The beauty! The walking sitck is one that Bob is working on.
I was sitting in our vendor booth at the Florida Flywheelers show in January when I saw what looked like a downsized Model T Ford coming down the aisle. I snapped a picture and asked the couple about their vehicle.
It turns out that this unique "automobile" was the creation of Bob and Carole Ramoski of Lakeland, Florida. Bob told me that he in fact made the vehicle from scratch. Carole is responsible for the finish on the wood, including maintaaining the beautiful finish by means of constant touch ups with sanding and re-varnishing the surfaces.
Bob made cardboard templates for each of the wood body parts. Cypress wood was used for everything except the bumpers. Bob explained that cypress is a very soft wood not suitable for bumpers of a vehicle. As you look at this beauty you keep seeing the marvelous details that they added to this machine. The headlights are original 1914 headlamps that Bob wired for electric lights, as the original were oil lamps. There is a Mercury hood ornament, and old buggy steps for the entering and exiting of the vehicle. Tailights were origianlly wood, but one of Bob's neighbors cast them in iron for him, along with the hinges for the top.
Model T Ford foot pedals are used on the finished cypress floorboard protected with a carpet. Bob made an attractive trunk behind the seat for storage. Motorcycle wheels are on the ground, complete with wooden hubcaps. Plant hangers make perfect armrests. A brass door knob finishes out the steering tiller. The powerplant for the vehicle is a Honda engine that drives the golf cart transmission.
Bob and Carole, originally from Pennsylvania, now call Lakeland, Florida home. They have been coming to the Florida Flyhweelers shows for several years. They always drive their beauty of a vehicle in the parade each show. Carole shared that these times at the Flywheelers are a great time for them to relax and just enjoy these fun events.
I enjoyed my conversation with Bob and Carole. We discussed Sher and my adventures on the road and they were gracious and generous with their time telling me the history of their neat home-made creation. Part of the enjoyment of travel is meeting interesting folks like the Ramoski's.
Thanks Bob and Carole. I enjoyed our conversation as well as the whole show!


Software visionary regains title as the world's richest man despite losing $18 billion in the past 12 months.
Software visionary regains title as the world's richest man despite losing $18 billion in the past 12 months. Stepped down from day-to-day duties at Microsoft last summer to devote his talents and riches to the Bill & Melinda Gates Foundation. Organization's assets were $30 billion in January; annual letter lauds endowment manager Michael Larson for limiting last year's losses to 20%. Gates decided to increase donations in 2009 to $3.8 billion, up 15% from 2008. Dedicated to fighting hunger in developing countries, improving education in America's high schools and developing vaccines against malaria, tuberculosis and AIDS. Appointed Microsoft Office veteran Jeffrey Raikes chief exec of Gates Foundation in September. Gates remains Microsoft chairman. Sells shares each quarter, redeploys proceeds via investment vehicle Cascade; more than half of fortune invested outside Microsoft. Stock down 45% in past 12 months. "Creative capitalist" wants companies to match profitmaking with doing good.


This article details how to create a Manual Playlist in the Manager.
Manual Playlists allow users to make a playlist of any videos regardless of category or keyword, but the user has to manually update the playlist to add new videos. Manual Playlists are more flexible than Smart Playlists in this regard, but do require more direct user management.
To create a Manual Playlist, log into the Field59 Video Manager and click the orange New button in the upper-right portion of the main menu, then choose Manual Playlist from the drop-down menu that appears to open the Create New Manual Playlist screen.
Give your playlist a meaningful Title and Description so it is easy to search/locate later if you need to update it.
In the Asset Criteria area, use the search to find your videos for the playlist. The Manual Playlist search will return any Title, Description, or Keyword tag that matches your search query. You can also filter by category, account (if your user has access to multiple accounts) and/or date range to further refine your search if needed.
To preview a video, click on the item title in the search results area to open a popup preview player. To add an item from the search results to your Manual Playlist, click the "plus sign" button to the left of the title. The item is added to the playlist in the Playlist Assets area. You can remove items already in your playlist by clicking on the "minus sign" button. There is a 100-item limit on manual playlists.
To reorder the items in your playlist, you can drag-and-drop items as needed by clicking to the right of an item in the playlist. The playlist will play the items from top to bottom.
When you are satisfied with your playlist, click the Save button to save your item to create the playlist.


text:
Kelvis Ochoa (born in 1970) is a Cuban author, composer, and singer.

At age 3, his parents moved to Isla de la Juventud ("Isle of Youth") where he grew up, situated about 100 kilometres south of the Havana, Cuba shore.

He is generally considered to be very popular with young Cubans and famous worldwide for having co-composed the original soundtrack from the movie Habana Blues. He is also part of the Cuban band Habana Abierta.

History

Childhood

Ochoa was born in Las Tunas, Cuba in 1970.

Ochoa's father was a percussionist in his grandfather's band, and when he heard them perform it inspired him to pursue music. Ochoa started playing conga tunes in the streets with his friends, and had his first stage performance when he was 14. At the performance he sang a tune by Cuban Sucu Sucu player Mongo Rives at an inter-school festival. He started to take guitar lessons and write poetry and songs. He tended to avoid any form of classical music training. Press agents called him "the Idol of Youth from the Isle of Youth".

Musical Style
His hometown had a substantial influence on his current music. La Isla de la Juventud is the cradle of the musical style known as sucu-sucu, where a soloist improvises in response to a repeated chorus, and is also accompanied by the instruments. This very traditional Cuban music became the trademark of Kelvis Ochoa; he mixes traditional Cuban rhythms (Sucu Sucu, Cha Cha Cha, Macuta, Songo, etc.) with modern music like funk, rock, and international pop.

Career
After moving to Havana in 1992 and forming a rock band called Cuatro Gatos (Four Cats), a significant moment for Kelvis Ochoa's arrived when he met the Cuban musician Pável Urkiza. Urkiza, who was part of the well-known Cuban duo "Gema y Pavel," was starting to make his name in the music production field and decided to produce Kelvis Ochoa on Habana Oculta. This was a July 1996 compilation of Cuban artists on the Madrid-based Nubenegra label. This record led to the formation of the band that would call itself Habana Abierta. They were rapidly met with success with the hit record Havana Abierta on the Spanish label BMG Ariola. After selling out concerts in Spain in the 1990s, they triumphantly returned to Cuba in 2003 for a show at La Tropical. A documentary was filmed about them, directed by Jorge Perugorría and Arturo Soto.

Kelvis Ochoa also started a solo career with his album Kelvis (BMG Ariola, 2001). Descemer Bueno, another Cuban musician, produced and co-wrote the album Amor y Música, released in 2009 on Cuba's EGREM label.

Together, the two men won the 2006 Goya and the 2006 "Premio de la Musica of the best movie soundtrack" for Havana Blues.

In 2013-14, Swiss film-maker Beat Borter made a documentary: "Yo sé de un lugar - Música y vida de Kelvis Ochoa" (I Know of a Place - the music and life of Kelvis Ochoa): Musician, poet, cook, dreamer… The ongoing voyage of Kelvis Ochoa living his music. Places and personalities have marked his life, work, generation, and Cuban culture.

Awards
2006: Premio de la Musica of the best movie soundtrack for Habana Blues (Madrid, Spain)
2006: Goya of the best movie soundtrack for Habana Blues (Academia de las Artes y las Ciencias Cinematográficas de España)

Discography
 1996: Habana Oculta (compilation, BMG Ariola)
 1997: Habana Abierta (with Habana Abierta, BMG Ariola)
 1999: 24 Horas (with Habana Abierta, BMG Ariola)
 1999: La Isla
 2001: Kelvis (BMG Ariola)
 2005: Boomerang (con Habana Abierta)
 2008: Amor Y Musica (EGREM)
 2014: Dolor con amor se cura (BIS)
 2018: Calle Amores (Universal)
 2021: 50 Grados (BisMusic)

References

havana-cultura.com

External links
 Myspace page

 Para Dar A Luz by Kelvis Ochoa Y 4 Gatos on Yahoo
 cubaabsolutely.com/music/contemporary.htm
 "Havana, Havana!", PBS TV documentary series, July 27, 2012. Interview with Kelvis Ochoa.
  http://vimeo.com/100750847  Trailer "Yo sé de un lugar - Música y vida de Kelvis Ochoa". Documentary. Switzerland/Cuba 2014, 97'

1970 births
Cuban musicians
Living people

redpajama_set_name: RedPajamaWikipedia


text:
Q: How to get an image from queued request body (Workbox PWA) I am using Workbox in my PWA. If app is offline and image posting request fails - it is automatically added to IndexedDB.
    const post = (file: File) => {
        const formData = new FormData()
        formData.append("image", file);
        axios.post('http://some.com/upload', formData, {
            headers: {
                'Content-Type': 'multipart/form-data'
            }
        }).then(...)

I want to show user all images of queued requests in offline mode. How i get requests:
import { openDB } from 'idb';
const db = await openDB('workbox-background-sync');
const queuedRequests = await db.getAllFromIndex('requests', 'queueName');

Body of request is ArrayBuffer (how request is stored in IndexedDB is showed on the picture). I don't understand how to "extract" image and pass it to
createObjectURL( imageBlob ).
If i decode body like this:
let view = new Uint8Array(body);
let bodyAsString = new TextDecoder().decode(view);

I got post body which contains image bytes after "image/png\r\n\r\n":
------WebKitFormBoundaryfc7IW9qvYqE2SdSm\r\nContent-Disposition: form-data; name="image"; filename="1.png"\r\nContent-Type: image/png\r\n\r\n�PNG\r\n\x1A\n\x00\...

I don't think that parsing payload using regexp, then encoding it is a good approach. How can this be done?

redpajama_set_name: RedPajamaStackExchange


text:
Deputy FM attends Tokyo int'l conference on African development
Hanoi, September 1 (VNA) – A Vietnamese delegation led by Deputy Foreign Minister Nguyen Quoc Cuong attended the seventh Tokyo International Conference on African Development (TICAD) in the Japanese prefecture of Yokohama from August 27 – 30.
VNA Sunday, September 01, 2019 18:00
Vietnam attends Tokyo int'l conference on African development
Vietnam, South Africa agree to maintain defence policy dialogue
At the event (Photo: VNA)
Hanoi (VNA) – A Vietnamese delegation led by Deputy Foreign Minister Nguyen Quoc Cuong attended the seventh Tokyo International Conference on African Development (TICAD) in the Japanese prefecture of Yokohama from August 27 – 30.
The event attracted representatives from 50 African countries, including 29 heads of State and government leaders.
Themed "Advancing development in Africa through people, technology and innovation", the conference focused its discussions on promoting economic transformation and business environment improvement via innovation and participation of private sector, building a sustainable and resilient society, and strengthening security and stability.
At the event, many African countries set the goal of soon becoming emerging economies with high level of industrialisation via establishing economic zones that offer incentives to foreign investors.
Speaking highly of Africa's bright prospects, international organisations and the private sector forecast that the continent's economy could grow by 6 percent annually and achieve a gross domestic product of nearly 2.6 trillion USD next year.
Participants adopted the Yokohama Declaration 2019 and issued an action programme to realise the document.
The Vietnamese delegation actively joined discussions at the event, affirming Vietnam's commitment to partnering with TICAD process and its wish to share development experience in fields of strength, especially in agriculture under public-private partnership model.
On the sidelines of the event, Cuong met bilaterally with Foreign Minister of Cameroon Lejeune Mbella and Director of the OECD Development Centre Mario Pezzini to discuss ways deepening bilateral ties in the near future.
He also held bilateral meetings with Secretary General of the Liberal Democratic Party of Japan and Chairman of the Japan – Vietnam Friendship Parliamentary Alliance Nikai Toshihiro, Parliamentary Vice-Minister for Foreign Affairs of Japan Suzuki Norikazu, Deputy Secretary General of National Security Secretariat and Assistant Chief Cabinet Secretary Kanehara Nobukatsu, and Governor of Kanagawa prefecture Kuroiwa Yuji to talk Vietnam – Japan ties as well as ties between Kanagawa prefecture and Vietnamese cities and provinces.-VNA
Deputy Foreign Minister Nguyen Quoc Cuong Vietnamplus Vietnam News Agency Tokyo International Conference on African Development TICAD Japanese prefecture of Yokohama Related stories Japan Related stories Vietnam
Deputy Minister of National Defence Sen. Lieut. Gen. Hoang Xuan Chien on January 20 hosted a reception for Colonel Eugene Vincent Jeoffrey Dudley, the new South African Defense Attaché in Vietnam.
Deputy minister receives outgoing, new Russian defence attaché
Deputy Minister of National Defence Sen. Lieut. Gen. Hoang Xuan Chien hosted a reception in Hanoi on January 19 for outgoing Russian defence attaché to Vietnam Col. Roman Boytsov and new defence attache Col. Govorov Alexey Arkadievich.
A resolution on fiscal and monetary policies supporting the socio-economic recovery and development programme was ratified at the 15th National Assembly's first extraordinary session (January 4 -11, 2022).
NA Standing Committee concludes seventh session
The National Assembly (NA) Standing Committee wrapped up its seventh sitting under the chair of Chairman Vuong Dinh Hue on January 19.
Prime Minister Pham Minh Chinh chaired a Government meeting to discuss lawmaking issues in Hanoi on January 19.

redpajama_set_name: RedPajamaCommonCrawl


Team Sweden was hoping for a chance to settle a score with host Finland at the 2016 IIHF World Championship, and their wish has come true after the Swedes earned a semi-final berth with a 6-0 win over Slovakia in a quarterfinal game at Helsinki Ice Hall.
The win means that Sweden will face Finland in the next round, although the Swedes may have been hoping for a gold medal game showdown to turn the tables on the Finns, who won gold at this event in Sweden two years ago after defeating the Swedes in overtime on a goal by Rasmus Ristolainen.
Six different players found the net in Sweden's win over Slovakia, with Joel Eriksson Ek (MIN), Oskar Lindblom (PHI), Cristoffer Ehn (DET), Adrian Kempe (LAK), Jens Looke (ARI), and Alexander Nylander (2016) beating goaltender Adam Huska (NYR) in the victory. Kempe, Looke, Axel Homstrom (DET) and Jakob Forsbacka-Karlsson (BOS) each produced two-point games, with Linus Soderstrom (NYI) posting his second shutout of the tournament.
Holmstrom and Forsbacka-Karlsson spoke with Hockey's Future following the win, with their comments being included in this HF video.
Game highlights from the Sweden-Slovakia game can be viewed below.


text:
all: release-std

# dependencies installs all of the dependencies that are required for building
# Sia.
dependencies:
	# Consensus Dependencies
	go get -u github.com/NebulousLabs/demotemutex
	go get -u github.com/NebulousLabs/fastrand
	go get -u github.com/NebulousLabs/merkletree
	go get -u github.com/NebulousLabs/bolt
	go get -u golang.org/x/crypto/blake2b
	go get -u golang.org/x/crypto/ed25519
	# Module + Daemon Dependencies
	go get -u github.com/NebulousLabs/entropy-mnemonics
	go get -u github.com/NebulousLabs/errors
	go get -u github.com/NebulousLabs/go-upnp
	go get -u github.com/NebulousLabs/muxado
	go get -u github.com/NebulousLabs/threadgroup
	go get -u github.com/klauspost/reedsolomon
	go get -u github.com/julienschmidt/httprouter
	go get -u github.com/inconshreveable/go-update
	go get -u github.com/kardianos/osext
	go get -u github.com/inconshreveable/mousetrap
	# Frontend Dependencies
	go get -u github.com/bgentry/speakeasy
	go get -u github.com/spf13/cobra/...
	# Developer Dependencies
	go install -race std
	go get -u github.com/client9/misspell/cmd/misspell
	go get -u github.com/golang/lint/golint
	go get -u github.com/NebulousLabs/glyphcheck

# pkgs changes which packages the makefile calls operate on. run changes which
# tests are run during testing.
run = .
pkgs = ./api ./build ./compatibility ./crypto ./encoding ./modules ./modules/consensus                                  \
       ./modules/explorer ./modules/gateway ./modules/host ./modules/host/contractmanager                               \
       ./modules/renter ./modules/renter/contractor ./modules/renter/hostdb ./modules/renter/hostdb/hosttree            \
       ./modules/renter/proto ./modules/miner ./modules/wallet ./modules/transactionpool ./persist ./siac               \
       ./siad ./sync ./types

# fmt calls go fmt on all packages.
fmt:
	gofmt -s -l -w $(pkgs)

# vet calls go vet on all packages.
# NOTE: go vet requires packages to be built in order to obtain type info.
vet: release-std
	go vet $(pkgs)

# will always run on some packages for a while.
lintpkgs = ./modules ./modules/gateway ./modules/host ./modules/renter/hostdb ./modules/renter/contractor ./persist
lint:
	@for package in $(lintpkgs); do                           \
		golint -min_confidence=1.0 $$package                  \
		&& test -z $$(golint -min_confidence=1.0 $$package) ; \
	done

# spellcheck checks for misspelled words in comments or strings.
spellcheck:
	misspell -error .

# dev builds and installs developer binaries.
dev:
	go install -race -tags='dev debug profile netgo' $(pkgs)

# release builds and installs release binaries.
release:
	go install -tags='debug profile netgo' $(pkgs)
release-race:
	go install -race -tags='debug profile netgo' $(pkgs)
release-std:
	go install -tags 'netgo' -a -ldflags='-s -w' $(pkgs)

# clean removes all directories that get automatically created during
# development.
clean:
	rm -rf release doc/whitepaper.aux doc/whitepaper.log doc/whitepaper.pdf

test:
	go test -short -tags='debug testing netgo' -timeout=5s $(pkgs) -run=$(run)
test-v:
	go test -race -v -short -tags='debug testing netgo' -timeout=15s $(pkgs) -run=$(run)
test-long: clean fmt vet lint
	go test -v -race -tags='testing debug netgo' -timeout=500s $(pkgs) -run=$(run)
test-vlong: clean fmt vet lint
	go test -v -race -tags='testing debug vlong netgo' -timeout=5000s $(pkgs) -run=$(run)
test-cpu:
	go test -v -tags='testing debug netgo' -timeout=500s -cpuprofile cpu.prof $(pkgs) -run=$(run)
test-mem:
	go test -v -tags='testing debug netgo' -timeout=500s -memprofile mem.prof $(pkgs) -run=$(run)
bench: clean fmt
	go test -tags='debug testing netgo' -timeout=500s -run=XXX -bench=$(run) $(pkgs)
cover: clean
	@mkdir -p cover/modules
	@mkdir -p cover/modules/renter
	@mkdir -p cover/modules/host
	@for package in $(pkgs); do                                                                                \
		go test -tags='testing debug' -timeout=500s -covermode=atomic -coverprofile=cover/$$package.out ./$$package -run=$(run) \
		&& go tool cover -html=cover/$$package.out -o=cover/$$package.html                                                      \
		&& rm cover/$$package.out ;                                                                                \
	done

# whitepaper builds the whitepaper from whitepaper.tex. pdflatex has to be
# called twice because references will not update correctly the first time.
whitepaper:
	@pdflatex -output-directory=doc whitepaper.tex > /dev/null
	pdflatex -output-directory=doc whitepaper.tex

.PHONY: all dependencies fmt install release release-std xc clean test test-v test-long cover cover-integration cover-unit whitepaper

redpajama_set_name: RedPajamaGithub


JumpCloud® Directory-as-a-Service® offers next generation single sign-on (SSO) capabilities for modern organizations, which includes a SAML 2.0 SSO connector for PluralSight. Read this Knowledge Base article to learn how to connect your JumpCloud identities to your PluralSight accounts.
PluralSight is a learning solution that inspires users to create the future. With Pluralsight, users can keep up with the speed of an ever changing technological world. Employees can work smarter and more efficiently, gaining valuable skills in areas like cloud, mobile, security, and data. In short, Pluralsight enables you to test your skills, learn something new, and repeat.
JumpCloud is directory services for the modern workplace. Admins who use JumpCloud for system management, LDAP authentication, and RADIUS networking can also manage user access to PluralSight accounts with the cloud directory service. By consolidating identity and access management, JumpCloud provides True Single Sign-On™ for organizations.


text:
Netflix Announces "Tribes of Europa" – German Sci-Fi Drama Coming February
By MaFt On December 18, 2020 In Netflix Originals, Netflix Worldwide, News, Release Dates, Trailers	Netflix Originals, Netflix Worldwide, News, Release Dates, Trailers 0
Netflix has released a teaser trailer for an upcoming young-adult sci-fi drama, "Tribes of Europa". The German series will arrive on February 19th and is set in 2074 after a mysterious global catastrophe… What remains of Europe is fractured into countless micro-states with several so-called 'Tribes' fighting for dominance over the continent. The film is described as a 'post-apocalyptic, adventurous saga' and follows three siblings who are forced to set out to change the fate of this new "EUROPA."


text:
Ökologie & soziale Verantwortung
Manual für die Umsetzung
Revisionsverfahren
Zulassungsverfahren für Textilhilfsmittel
Zugelassene Zertifizierungsstellen
Bedingungen für Zertifizierungsstellen
Zertifikatsvorlagen
Lizenzierung und Kennzeichnung
Produktkennzeichnung
Lizenzierungs- und Labelling Leitfaden
Öffentliche Datenbanken
Suche nach Firmen und Produkten
Informations-zentrum
abboniert
Unsere Vision, unsere Mission
Rat der Zertifizierer
Entwicklung und Umsetzungsstatus
Was ist RSS ?
Elif Yarasik appointed as GOTS Representative in Turkey
Zuletzt aktualisiert: Dienstag, 23. Mai 2017 22:54
GOTS is pleased to announce Elif Yarasik as the regional representative in Turkey. Turkey is the country with the second most GOTS certified facilities worldwide (469 in 2015) which makes it a very important sourcing market.
Previously Elif has worked in textile both in manufacturing and sourcing industry since 1993, among others for Turkey offices of Nike, Hanesbrands, Next and Puma and for big vertical garment suppliers of Turkey. She has an extensive experience on understanding manufacturing and sourcing side of business in addition to technical side. Her main expertise is the implementation and managing the ecological, environmental, social compliance requirements of textile suppliers as per brand specific requirements which includes global legislations. Certification management in supply chain in correlation with buying/sourcing decisions also taking consideration the manufacturing possibilities is another achievement on her carrier. She also has technical experience for process and quality testing, dying and finishing of fabrics addition to project management for sourcing the machineries and process efficiency in dye-houses.
Elif holds a bachelor degree as a Chemist from Middle East Technical University.
Elif will be based in Istanbul and can be reached at
GOTS at BioFach India 2016
Zuletzt aktualisiert: Montag, 06. Mai 2019 15:17
GOTS INVITES YOU TO ITS BOOTH AT BIOFACH INDIA 2016, NEW DELHI, INDIA
We are glad to invite you again to be a part of BIOFACH INDIA together with INDIA ORGANIC 2016, going to be held in New Delhi, India from 10th to 12th November, 2016. GOTS remains pledged to increasing awareness about certified organic textiles and educating about the concerns regarding conventional textile processing.
All exhibitors and visitors are invited to meet with Mr. Sumit Gupta, GOTS Representative in India, at the GOTS Information booth to learn about opportunities in India in the field of organic textiles. Mr. Gupta will be present for three days to answer all your queries about organic textiles certification, traceability, benefits and any other related questions.
GOTS is proud to be supporting the event (annual BIOFACH INDIA together with INDIA ORGANIC) for the fifth year. It will be held at NSIC Exhibition Grounds, Okhla, New Delhi, India from 10th to 12th November, 2016. If you also wish to exhibit there, you can get in touch with Mr. Gupta:
Please download and read through Biofach India 2016 Textile Factsheet for more details.
SDC Lecture in PSG College, Coimbatore, India
Society of Dyers and Colourists EC, India organized an Expert Lecture in PSG College of Technology, Coimbatore, India. GOTS Representative in India Mr. Sumit Gupta, who also an associate (ASDC) of SDC, UK was invited as an external expert. The lecture was held on 12th September, 2015. The audience comprised of students of B.Tech Textile Technology from the institute.
As Mr. Gupta is also an Hon. Trustee of SDC EC, he started with a small introduction of SDC and its activities in India. This was followed by technical presentation on the subject, "Compliance and Certification requirements in Organic Textiles". Mr. Gupta informed the students about hazardous chemicals in conventional textile processing and associated health risks. He also spoke about some certifications in field of sustainable textiles like GOTS, OCS, GRS etc. as well as the traceability of products along textile supply chain. Furthermore, he encouraged students to take up research projects that are focused on environment friendly materials and processes.
GOTS Participated in Textile Exchange Sustainability Conference 2015
GOTS Deputy Technical Director Mr. Sumit Gupta spoke at Integrity 101 Session at TE Conference in Mumbai, India on 6th October, 2015. His presentation gave an overview about GOTS standard, key criteria across supply chain and labelling guidelines. The presentation was followed by a very interesting exercise for the participants, wherein they were asked to find out correct and incorrect label uses from 5 given examples. Other speakers in the session were Mr. Lee Tyler from Textile Exchange and Mr. Richard Cepeda from prAna. Attendees of the conference can download a copy of the presentation from the link.
GOTS was also one of the sponsors of 'Organic Cotton Round Table', held on 8th October, 2015. Mr. Gupta participated along with Ms. Prachi Gupta (Technical Office Manager India) and also hosted a Lunch Table Discussion during the 'Eat and Greet' session on the topic, "Relevance of Supply Chain Certifications at Later Stages of Production". There was a mix of academicians, fibre manufacturer, non-retailer brands, retail brands, natural dyes manufacturer at the table. One of the clear conclusions of the discussion was need for formation of Regional Working Groups, including brands, retailers and representatives of Standard Owner/ Certification Body. These groups will work towards promoting use of labels instead of self-claims. A summary of OCRT can be read at the link.
GOTS invited to speak at 'Smart Vision 2020' by SASMIRA, Mumbai
The Synthetic and Art Silk Mills' Research Association organized a gathering of its alumni on 14th October, 2015 in Mumbai, India. The theme of the event was 'Smart Vision 2020'. GOTS representative in India Mr. Sumit Gupta was invited as an external expert to speak on 'Sustainability and GOTS Certification for Holistic Growth'. Mr. Gupta spoke about basic features of GOTS as a sustainability standard and how sustainability related research initiatives are vital to holistic growth of textile industry.
He emphasized that the entrepreneurs need to take a top-down approach to sustainability and the top management must adopt sustainable practices as a management approach for long term competitive gains, rather than responding to external demands for compliances and sustainable products. The lecture was much appreciated by the organisers and attendees, which comprised of both industry professionals and entrepreneurs.
GOTS participated in Heimtextil India Exhibition and Sustainability Seminar
GOTS Conducts Annual Workshops in ESMOD, Berlin
GOTS at Intertextile Shanghai Apparel Fabrics - Autumn Edition 2015
Click here to subscribe to the GOTS-newsletter


text:
Lakeshore Players Dorval > OPENING NIGHT
Whisper on the Wind is about to make its theatrical debut and director Richard Hyde-Finch is eager for accolades. If only the unpredictable actors and audience members would "follow the script" on opening night. This laugh-a-minute comedy shines a whimsical spotlight on the Canadian theatre scene and will have you shouting BRAVO!
THE BOX OFFICE IS OPEN!
* NEW THIS SEASON: Opening night of OPENING NIGHT will begin at 7:30 pm and will be followed by a reception (with refreshments) in our lobby where audience members will be able to meet and mingle with the cast and production team.
SHOW DATES & TIMES
Thursday May 9th, 2019 at *7:30 PM*
Friday May 10th, 2019 at 8:00 PM
Saturday May 11th, 2019 at 8:00 PM
Sunday Matinee May 12th, 2019 at 2:00 PM
Thursday May 16th, 2019 at 8:00 PM
Saturday Matinee May 18th, 2019 at 2:00 PM
– Cast & Crew BIOGRAPHIES –
Corey CASTLE – Director
Corey has directed numerous productions in and around Montreal, including Cabaret (Theatre Lac Brome and Centaur Theatre), Into the Woods (Concordia University), Blokes, Blokes II, Troubadours Through Time, Mainly Montreal (Centaur Theatre, starring Bowser and Blue), The Last Five Years (Hudson Village Theatre), many musicals (Lyric Theatre) and Gilbert & Sullivan operettas (Montreal West Operatic Society, Lakeshore Light Opera). This is Corey's sixth time directing for Lakeshore Players Dorval. He is a graduate of the American Musical and Dramatic Academy in New York. While there he assisted in the off-Broadway production of the musical Falsettoland.
Tommy FURINO – Jack Tisdale
This will be Tommy's third show with Lakeshore Players Dorval. He was most recently seen as PC Ramsden and Bailiff in Rough Justice from last season. His previous show with LPD was Not Now, Darling (Harry McMichael) in 2015. Other favourite theatre credits include I Am Yours (Toilane) and Featuring Loretta (Dave) , both with Tableau D'Hôte Theatre, Twelfth Night (Sir Toby Belch and Sebastian) and A Midsummer Night's Dream (Demetrius and Francis Flute), both with Montreal Shakespeare Theatre Company, Chapter Two (Leo Schneider) with Pier 21 Productions, and Closer (Daniel Woolf) with Acts to Grind Theatre. He would like to thank all of you for coming out to watch and for your support of theatre.
Jeffrey FREEMAN – Clayton Fry
Jeff moved to Montreal in 2002 from England and quickly became involved in the Montreal West Operatic Society, taking his first Canadian role as the Mikado, followed by Lord Chancellor in Iolanthe and Roddy-Doddy in Ruddigore, before stage-directing Yeomen of the Guard. With a private group, he performed in The Bat Goes To The Ball (Die Fledermaus). Past U.K. roles include, among others, Pozzo in Waiting for Godot, Mannering in Gaslight, Hook in Peter Pan, Don Pedro in Much Ado About Nothing, Polixenes in The Winter's Tale and Stephano in The Tempest. Jeff stage managed the semi-professional Dorset Opera for two seasons and, with The Riverside Players, he directed an outdoor production of John Gay's The Beggar's Opera. Jeff is looking forward to his first outing with Lakeshore Players Dorval.
Lisa McCORMACK – Cilla Fraser
Lisa is so pleased to be back on stage for this production, having spent the 2018-19 Lakeshore Players Dorval season in Front of House in her new role as Business Manager on LP's Board of Directors. Previous stage roles include Elmire in Tartuffe and Jean Highwood in Rough Justice during last year's LP season, as well as the Jester in Hudson Music Club's META-nominated production of Once Upon a Mattress. When she's not working, she can usually be found hanging out with her two lovely daughters, Kayla and Reilly – her reason for being. Enjoy the show!
Sterling MAWHINNEY – Michael Craig
Sterling is pleased to be back for another Lakeshore Players Dorval production. Sterling has been lucky to appear in the LP productions of The Cat's Meow, The Real Inspector Hound, Picasso at the Lapine Agile, Rehearsal for Murder, The Mousetrap, Boeing Boeing, Vanya and Sonia and Masha and Spike, Calendar Girls, and Rough Justice. Other selected credits include Lion in the Streets (Bill) and Seven Stories (Rodney) for Tableau D'Hôte Theatre, Man of La Mancha (Juan) for the Segal Centre, The Crucible (Hopkins) for the Centaur Theatre and Rope (Rupert Cadell) for La Maison Theatre. Sterling most recently appeared in LP's The Odd Couple, Female Version. Thanks to the cast and crew for all the laughs. Enjoy the show.
Elisa MacLEOD – Libby Husniak / Properties & Décor
Elisa is a graduate of the Dawson Professional Theatre Program. She has worked extensively with groups such as The Montreal West Operatic Society and the Stratford Shakespeare School, and is currently playing Helena in a touring production of A Midsummer Night's Dream. This is her second season with Lakeshore Players Dorval, having played Marianne in Tartuffe and Elaine in Calendar Girls during last season.
Mary VUORELA – Ruth Tisdale
"All the world's a stage, and all the men and women merely players; they have their exits and their entrances, and one man in his time plays many parts." Mary's professional stage management credits include On a First Name Basis (starring Norm Foster), The Woman in Black, Brigit's Reel and Harvest. Acting credits include The Melville Boys, Opening Night (Libby in 1998 and Cilla in 2008), The Long Weekend, Ethan Claymore and On Golden Pond. Directing credits include The Tempest, A Midsummer Night's Dream, Campbell's Sutra and Queen Milli of Galt (for Lakeshore Players Dorval in 2009). Mary wishes to thank this supportive and brilliant cast and crew for allowing her to make this hat trick.
Don FLETCHER – Richard Hyde-Finch
Don has been a member of Lakeshore Players Dorval for the past 15 years, last appearing on stage in their 2008 production of Silver Dagger. Since then, Don has been mostly working behind the scenes, building sets for the last 30+ shows with his dad Bill and brother Derek. But after appearing in last year's Improv Challenge, pitting Lakeshore Players Dorval against Hudson Players Club, it looks like he's caught the acting bug again. Working with director Cory Castle has been so much fun that it may not be another 10 years before you see him on stage again. He hopes that's a good thing.
Kevin STELIGA – Tom Delaney
Kevin is excited to be participating in his first Lakeshore Players Dorval production. Kevin appeared in the John Abbott production of You Can't Take it With You (2016) and The Crucible (2017). He has also performed with the former Espresso Theatre of the Montreal School of Performing Arts, including Archie and Pals (2007), Robin Hood: There Will Be Tights (2008)and The Treasure Pile (2010). Having recently completed the three-year John Abbott Professional Theatre Program, Kevin is looking forward to becoming more involved with community theatre, starting with this wonderful play from Canada's own Norm Foster. Thanks to the cast and crew for making this such great fun.
Sean BIRD – Co-Producer
This is Sean's first time producing for Lakeshore Players Dorval, but he's been helping backstage and front-of-house for the last 10 years. He debuted on the LP stage in their 2014 production of the hilarious comedy Don't Dress for Dinner. Prior to that, he appeared in The Good, the Bad and the Ugly Sisters (Room to Grow Productions, 2015) and Whose Wives Are They Anyway? (Hudson Players Club, 2016). He has also appeared in many of the annual murder-mystery dinner theatre productions at Dorval Strathmore United Church, and several Christmas Pantos at Hudson Village Theatre. He is grateful to the outstanding cast and crew of Opening Night for their commitment to bringing you the very best of community theatre. He would like to thank his co-producer, Wayne, for showing him a few of the producing ropes.
Wayne SARAY – Co-Producer
This is Wayne's second time producing for Lakeshore Players Dorval, after producing and appearing in The Curious Savage (2016). He has appeared in two other LPD productions: You Can't Take It With You (2013) and Not Now, Darling (2015). He has also produced and stage managed for Hudson Players Club, and appeared in HPC's A Midsummer Night's Dream (Shakespeare by the Lake, 2015), The Great Gatsby (2016), and Samuel Beckett's enigmatic but compelling Endgame (2017), in which he spent 90 minutes in a garbage bin. Yeah, you had to be there. He is thrilled to share his passion for the theatre with our wonderfully supportive audience, without whom all we'd have are words on a page. He'd like to thank his wife, Sharon, who has always encouraged him to go out and play, the dedicated and talented cast and crew of Opening Night, and his co-producing partner in crime, Sean, for his help in herding the cats.
Susan FREED – Stage Manager
Susan has experience in all aspects of community theatre. She has worked on many Lakeshore Players Dorval shows for more than 25 years. She recently returned to Montreal after completing a BFA in Film Production at York University where she made several short films. Currently she has a feature length screenplay in development. Susan is thrilled to be working with a great cast and crew on yet another wonderful LPD production.
Mélanie DESJARDINS – Apprentice Stage Manager
This is Melanie's fifth year with Lakeshore Players Dorval and her first time working behind the scenes as apprentice stage manager to the wonderful Susan Freed. She is grateful to be learning from such a pro. In the past, you may have seen on stage as Alice in You Can't Take it With You (2013), Janie McMichael in Not Now, Darling (2015), Puck in Shakespeare in Hollywood (2015), Gloria in Boeing Boeing (2016), Mary in The Inspector General (2016), and Sylvie in The Odd Couple, Female Version (2019). She's thankful to be working with such a talented team.
Jean-Claude OLIVIER – Set Designer
Jean-Claude is an award-winning set designer and scenic artist whose work has been seen across Canada for more than forty years. A graduate of McGill University and Université de Montréal, he also studied at the National Theatre School of Canada, and was taught and mentored by noted designer Robert Prévost. He has designed for Les Grands Ballets, Théâtre du Rideau Vert, and Théâtre du Nouveau Monde, and he also worked one season at the Stratford Festival. Locally, his work has graced productions by the Segal Centre, the Lyric Theatre, and Hudson Village Theatre, as well as the Beth Israel, Beth Tikvah and Arcadians musical theatre groups, including many Gilbert & Sullivan operettas along the way. In 2006, he won the OVATION Award for Best Scenic Design for Peter Pan (Vancouver), for which he was also received a JESSIE nomination. And in 2008, he received a second OVATION Award for Best Scenic Design for The Drowsy Chaperone, a co-production of the National Arts Centre and the Vancouver Playhouse. He has also worked in Drayton (Ontario), Toronto and Quebec City. Recent Hudson Village Theatre productions include Jack of Diamonds, Savannah Sipping Society, Snow White (the Panto), The Drowsy Chaperone, One Flew Over the Cuckoo's Nest and Rumors. JC is pleased to be designing again for Lakeshore Players Dorval. Past LPD credits include Amadeus, Anne of 1000 Days, Matchmaker, Pygmalion and My Three Angels.
Alex SMITH – Lighting Design
Alex is a Montreal-based lighting designer, stage manager and playwright, and is pleased to be back with Lakeshore Players Dorval again after designing for The Miracle Worker earlier this season. As a designer, his work has toured as far afield as Halifax, Winnipeg and New York. Additionally, Alex serves as a resident stage manager for Dawson College's Professional Theatre Department.
Holli DRUM – Assistant Stage Manager
Holli has been a Lakeshore Players Dorval staple for almost 25 years and a priceless member of the backstage team. She and Gillian have worked every LP production over the last several years. In her other life, Holli works with seniors and is very involved with the Girl Guides as a Brownie and Ranger leader in Dorval.
Gillian GILBERT – Assistant Stage Manager
Originally from the U.K., Gillian always loved the theatre and music, singing in rock bands (notably with Steve Hackett of Genesis). In Canada she appeared at Le Festin du Gouverneur and with the Mount Royal Operatic Society before joining Lakeshore Players Dorval. Over the years, Gillian has absolutely loved being part of the "Players" family, appearing on stage in the fabulous Calendar Girls, Shakespeare in Hollywood and Jane Eyre, and behind the curtains with her backstage "sister" Holli and all the wonderful casts and crews over the years. Thanks to you all for making community theatre such a rich and rewarding experience. Now, turn off your cell phones and enjoy the show!
Jim VOYSEY – Board Operator
Jim appeared on stage for the first time with Lakeshore Players Dorval in the 2016 production of The Inspector General as Bobby Frick. Since then he has co-produced four other LPD shows: Crimes of the Heart in 2016 and the META-nominated Calendar Girls in 2018, both with Kosta Kokosopoulos, and Rough Justice last season, with Vicky Kuchlein. He then did double duty as co-producer and lighting board operator for The Odd Couple, Female Version. He returns once again as board operator so he hopes he has figured it all out and won't leave us in the dark!
Elena CERROLAZA – Props Manager
Elena has been involved with just about every aspect of community theatre, both onstage and behind the scenes. She has performed in a dozen Gilbert & Sullivan operettas and has directed Ruddigore, The Gondoliers, and Trial by Jury for the Montreal West Operatic Society. More recently, she has focused on set and prop design and construction. She is delighted to have the opportunity to work with the Lakeshore Players Dorval creative team.
Karen PEARCE – Costume Designer
Karen has been involved in many aspects of theatre production over the years – producer, director, choreographer – but at some point she realized that costuming was a great excuse to expand her wardrobe, engage in a genetically predetermined hoarding tendency ("It's not my fault, it's in my genes."), and stay in shape (weight training!). She's on her way to having the biggest walk-in closet on the West Island (some people call them garages). If you're a Lakeshore Players Dorval regular, you will have seen Karen's work in Picasso at the Lapin Agile, The Cat's Meow, And Then There Were None, The Mousetrap, last season's Tartuffe and Calendar Girls, and this season's opening production, The Miracle Worker. Karen loves to paint a picture with colour, pattern and sparkle; some say they can recognize her costumes even before reading the program. (She hopes this is a good thing.) Karen is grateful to LPD for their confidence and support.
Liana NAVROZIDIS – Board Operator
Liana's first encounter with live theatre was as Orphan #2 in a school production of Oliver Twist and, subsequently, Elsa in The Sound of Music. After a life spent as an audience member, she has decided to throw herself into the production side of this wondrous business. Liana is thrilled to be behind the scenes of her first theatrical production, and she thanks Lakeshore Players Dorval for their vote of confidence.
Steve WOODWARD & Bill FLETCHER – Set Construction
Steve Woodward and Bill Fletcher are true Lakeshore Players Dorval veterans. Steve started set-building for LP in the late 1980s and, after a 20-year absence, returned to the fold in 2010 and has worked on every show since then, as well as developing set designs for The Mousetrap and The Curious Savage. Bill came to LPD for a part in My Three Angels in 1995 and is still haunting the wings, serving as Production Manager on more than 30 shows since 2001.
Eric SAUVÉ – Sound Designer
Ahhh, finally, opening night. All those months of preparation are coming to fruition… OPENING NIGHT!!! Already!?! I completely forgot to do the sound cues! Oh boy, oh boy, oh boy! Where's my laptop… where's the power supply… where's the mouse… OH NO! the power just went out… It's ok, it's ok, I'll just hum the songs into my phone, yeah, that's the ticket… Who's calling me now!?! I've just won a cruise!?! Nice! Ok, the power just came back on. What's this play about again? Ok, focus… opening night… what could go wrong? Enjoy the show.


SVA Event RID 225. "Is Figuration a Reaffirmation of the Status Quo?" Audrey Flack, Leon Golub, Alfred Leslie, Thomas Lawson, moderator Corinne Robins. 17 November 1981.
Panel discussions and talks sponsored by the Fine Arts Department in the heady conceptual late-70s and early-80s often adopted a DIY or punk aesthetic in their announcements. The gritty, hand-composed images reinforced the impression of open-ness of work that dispensed with, or critiqued, illusion.
SVA Event RID 152. An Informal Talk With Lee Krasner. 9 December 1977.
SVA Event RID 213. Symposium. With Ingrid Sischy, Carol Squiers, Alan Moore, Diego Cortez, Julian Schnabel, Jenny Holzer, and Barbara Kruger. Organized by Joseph LaPlaca and Randolph Black, 4 May 1981.
Oh look who they almost forgot there. More posters for a Fine Arts Film Series next week.


Cologne, August 4. Dr. Gottschalk had his three first interrogations published in the Zeitung des Arbeiter-Vereines zu Köln. As a punishment, the warders he has had up to now have been removed and a new gaoler appointed in the person of warder Schröder.
Public proceedings in the Rhine Province are a sheer illusion as long as they are supplemented by "Spanish Inquisition proceedings".
In order to appreciate Gottschalk's arrest, one should read the Gervinus Zeitung. [Deutsche Zeitung] The forceful intervention of the Public Prosecutor, it says, has restored confidence once more. On the other hand, the approaching festivities [600th anniversary of the Cologne Cathedral in August 1848] are diverting the attention of the frivolous citizens of Cologne from all thought of politics. And these same citizens of Cologne, to whom the Government has handed over Gottschalk and the Cathedral festivities, these same ungrateful citizens, the Gervinus Zeitung exclaims, forget all these good deeds of the Prussian Government as soon as it stammers the first word about a compulsory loan!
The arrest of Gottschalk and Anneke, the press trials, and so on, have restored confidence. In the city, confidence is the basis of public credit. Therefore lend the Prussian Government money, a great deal of money, and it will lock up even more people, stage even more press trials, manufacture even more confidence. More arrests, more press trials, more reaction from the Government. But in honest exchange — mark this well — more money, more and more money from the citizens!
We advise the Prussian Government in its financial difficulties to take refuge in a measure tried and tested under Louis XIV and Louis XV. Let it sell Lettres de cachet! Lettres de cachet! Lettres de cachet! as a means of restoring confidence and filling up the Prussian treasury!


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In 2008, Fabrice managed to write, produce, direct "Good Boys go to Heaven and Bad Boys go to Europe" (in Tomsk, Siberia), his first feature-length documentary film.
The film premiered at the prestigious Cultural Center (800 seats) of Tomsk State University, the first University in Siberia, and is currently in the process of being distributed.
The initial introduction of the film will be followed by the screening of "Good Boys go to Heaven and Bad Boys go to Europe" (52min-).
The screening will be followed by a Q & A session.


text:
Articles of Significant Interest Selected from This Issue by the Editors
DOI: 10.1128/MCB.00074-17
L2hgdh Deficiency Causes Brain Defects
l-2-Hydroxyglutarate aciduria (L-2-HGA) is an autosomal recessive neurometabolic disorder caused by a mutation in the l-2-hydroxyglutarate dehydrogenase gene (L2HGDH) and characterized by the accumulation of l-2-hydroxyglutarate (L-2-HG) in the body fluids. The progression of this disease is poorly understood. Ma et al. (e00492-16) generated L2hgdh knockout (KO) mice and observed a robust increase of L-2-HG levels in the brain and testis, which was accompanied by increased histone methylation. L2hgdh KO mice exhibit progressive leukoencephalopathy, impaired adult hippocampal neurogenesis, and late-onset neurodegeneration. These findings provide insights into how L-2-HG accumulation leads to L-2-HGA pathogenesis.
Deciphering the Role of FBXL5 during Brain Development
FBXL5 (F box and leucine-rich repeat protein 5) mediates the degradation of iron regulatory proteins (IRPs) and is a key upstream regulator of intracellular iron levels. Yamauchi et al. (e00470-16) found that the loss of FBXL5 resulted in a progressive increase in the number of neural stem progenitor cells in the cerebral cortex of mouse embryos. The iron accumulation due to FBXL5 loss induced production of reactive oxygen species, which in turn activated signaling by the mammalian target of rapamycin (mTOR). The findings provide important new insight into the importance of iron homeostasis mediated by FBXL5 in the brain.
PP2A-B56 Prevents Autophosphorylation-Mediated Cyclin E Degradation
The SCFFbw7 ubiquitin ligase targets cyclin E for degradation following cyclin E autophosphorylation at S384 by cyclin-dependent kinase 2 (CDK2). Davis et al. (e00657-16) investigated how cyclin E-CDK2 complexes—which have key roles in exit from quiescence and S-phase entry—can phosphorylate cell cycle proteins prior to initiating cyclin E destruction. They found that PP2A-B56 phosphatases dephosphorylate cyclin E specifically at S384. Additionally, preventing S384 dephosphorylation by PP2A-B56 knockdown decreases cyclin E kinase activity and half-life at the G1/S transition. Thus, cyclin E dephosphorylation counteracts its autocatalytic degradation during the portion of the cell cycle where its function is most important.
NDR1 Regulation of Kindlin-3 Controls High-Affinity LFA-1 Binding and Immune Synapse Organization
LFA-1/ICAM-1 interactions play an important role in formation of the immune synapse (IS), a specialized adhesion structure between T cells and antigen-presenting cells. However, the dynamics and regulatory mechanism of adhesive interactions have been unclear. Kondo et al. (e00424-16) have established a novel method by which synaptic interactions of LFA-1/ICAM-1 can be measured at the single-molecule level and found that high-affinity binding occurred in a zone enriched for activated Rap1 and kindlin-3. The authors demonstrate that NDR1 activated by Rap1 signaling controls kindlin-3 recruitment to IS, which in turn mediates high-affinity binding and IS organization, resulting in antigen-triggered stopping and proliferation of T cells.
Low Doses of Tumor Necrosis Factor Alpha Improve Osteogenesis by Modulating Gs-Coupled Receptor Signals
Daniele et al. (e00442-16) investigated the beneficial effects of the proinflammatory cytokine tumor necrosis factor alpha (TNF-α) on mesenchymal stem cell (MSC) differentiation to osteoblasts. The effect of the cytokine was probed for modulation of expression/activity of the A2B adenosine receptor (A2BAR), a G-protein-coupled receptor (GPCR) that exerts anabolic effects on bone. Low TNF-α concentrations induced a prodifferentiating effect on MSCs and, by regulating GPCR-regulated kinase 2 turnover/expression, impaired A2BAR desensitization, increasing in turn the pro-osteogenic effects elicited by A2BAR agonists. Thus, receptor desensitization plays a pivotal role in osteogenesis, and its manipulation may be useful to favor bone remodeling.
Copyright © 2017 American Society for Microbiology.
Molecular and Cellular Biology Mar 2017, 37 (8) e00074-17; DOI: 10.1128/MCB.00074-17
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当前期刊: Journal of the Optical Society of America A Go to current issue 加入关注
Temporal coherence and polarization modulation of pulse trains by resonance gratings
J. Opt. Soc. Amer. A (IF 1.861) Pub Date : 2019-12-02
Henri Pesonen, Peng Li, Tero Setälä, and Jari Turunen
Twisted elliptical multi-Gaussian Schell-model beams and their propagation properties
Haiyun Wang, Xiaofeng Peng, Lin Liu, Fei Wang, and Yangjian Cai
Evolution properties of the orbital angular momentum spectrum of twisted Gaussian Schell-model beams in turbulent atmosphere
Mengyao Zhou, Weichen Fan, and Gaofeng Wu
Diffraction of plane electromagnetic waves by a resistive half-screen for skew incidence
Yusuf Ziya Umul
Relativistic photography with a wide aperture
Norman Gray, Ruaridh O'Donnell, Ross MacSporran, Stephen Oxburgh, and Johannes Courtial
Analytic design of a spherochromatic singlet
Rafael G. González-Acuña and Julio C. Gutiérrez-Vega
Continuous phase-shifting holography
Sergey G. Kalenkov, Georgy S. Kalenkov, and Alexander E. Shtanko
Subtraction method via phase mask enables contrast enhancement in scanned Bessel light-sheet microscopy
Suhui Deng, Peng Wang, Yulong Zhang, Huilin Zhou, Jianzhong Yang, and Mingping Liu
Pixel reassignment in image scanning microscopy: a re-evaluation
Colin J. R. Sheppard, Marco Castello, Giorgio Tortarolo, Takahiro Deguchi, Sami V. Koho, Giuseppe Vicidomini, and Alberto Diaspro
Signal magnitude nonlinearity to an absorption coefficient in photoacoustic imaging
DongYel Kang
Adaptive exposure control for image-based visual-servo systems using local gradient information
Zhushun Ding, Xin Chen, Zhe Jiang, and Cheng Tan
Deep intrinsic decomposition trained on surreal scenes yet with realistic light effects
Hassan A. Sial, Ramon Baldrich, and Maria Vanrell
Phase retrieval based on the vectorial model of point spread function
Nguyen Hieu Thao, Oleg Soloviev, and Michel Verhaegen
V-groove-shaped silicon-on-insulator photopolarized activated modulator (SOIP2AM): a polarizing transistor
Jeremy Belhassen, Amos Frisch, Yuval Kapellner, Zeev Zalevsky, and Avi Karsenty
Global polarizability matrix method for efficient modeling of light scattering by dense ensembles of non-spherical particles in stratified media
Maxime Bertrand, Alexis Devilez, Jean-Paul Hugonin, Philippe Lalanne, and Kevin Vynck
Focused and defocused retinal images with Bessel and axicon pupil functions
Gerald Westheimer
Gaussian pulsed beam decomposition for propagation of ultrashort pulses through optical systems
Norman G. Worku and Herbert Gross
Theoretical analysis of quantum random walks with stress-engineered optics
Kevin Liang, Ashan Ariyawansa, Omar S. Magaña-Loaiza, and Thomas G. Brown
CIE self-luminous gray-scale calculation: inflections, parameters, and high-contrast limiting behavior
Iterative phase retrieval for digital holography: tutorial: publisher's note
Tatiana Latychevskaia
This publisher's note corrects the paper type and title of J. Opt. Soc. Am. A 36, D31 (2019) [CrossRef] .
Turning the page: editorial
P. Scott Carney
Editor-in-Chief P. Scott Carney introduces the Journal's newest Topical Editors, Irina V. Larina and Jonathan Petruccelli.
Digital Holography and 3D Imaging: introduction to the joint feature issue in Applied Optics and Journal of the Optical Society of America A
Pascal Picart, Partha Banerjee, Marc Georges, Juan Liu, Liangcai Cao, and Pierre-Alexandre Blanche
The OSA Topical Meeting on Digital Holography and 3D Imaging (DH) was held 20–23 May 2019 in Bordeaux, France. Feature issues based on the DH meeting series have been released by Applied Optics (AO) since 2007. This year, AO and the Journal of the Optical Society of America A (JOSA A) jointly decided to have one such feature issue in each journal. This feature issue includes 46 papers in AO and 9 in JOSA A and covers a large range of topics, reflecting the rapidly expanding techniques and applications of digital holography and 3D imaging. The upcoming DH Conference (DH 2020) will be held from 22 to 26 June in Vancouver, Canada, as part of the OSA Imaging and Applied Optics Congress.
Phase curvature compensation in digital holographic microscopy based on phase gradient fitting and optimization
Hongqiang Yu, Shuhai Jia, Jun Dong, Di Huang, and Shunjian Xu
We propose a numerical method for phase curvature compensation in digital holographic microscopy, in which the phase curvature is compensated for by subtracting a numerical phase mask from the distorted phase. The parameters of the phase mask are obtained based on phase gradient fitting and optimization, in which the initial mask parameters are obtained by fitting the phase gradient, and then more accurate mask parameters are determined using a spectrum energy search. The compensation can be executed in a hologram without extra devices or any prior knowledge of the setup and specimen. A computer simulation and experimental results demonstrated the feasibility of the proposed method.
Mean gradient descent: an optimization approach for single-shot interferogram analysis
Sunaina Rajora, Mansi Butola, and Kedar Khare
Complex object wave recovery from a single-shot interference pattern is an important practical problem in interferometry and digital holography. The most popular single-shot interferogram analysis method involves Fourier filtering of the cross term, but this method suffers from poor resolution. To obtain full pixel resolution, it is necessary to model the object wave recovery as an optimization problem. The optimization approach typically involves minimizing a cost function consisting of a data consistency term and one or more constraint terms. Despite its potential performance advantages, this method is not used widely due to several tedious and difficult tasks such as empirical tuning of free parameters. We introduce a new optimization approach, mean gradient descent (MGD), for single-shot interferogram analysis that is simple to implement. MGD does not have any free parameters whose empirical tuning is critical to the object wave recovery. The MGD iteration does not try to achieve minimization of a cost function but instead aims to reach a solution point where the data consistency and the constraint terms balance each other. This is achieved by iteratively progressing the solution in the direction that bisects the descent directions associated with the error and constraint terms. Numerical illustrations are shown for recovery of a step phase object from its corresponding off-axis as well as on-axis interferograms simulated with multiple noise levels. Our results show full pixel resolution as evident from the recovery of the phase step and excellent rms phase accuracy relative to the ground truth phase map. The concept of MGD as presented here can potentially find applications to a wider class of optimization problems.
Hybrid method for speckle noise reduction in digital holography
Jun Dong, Shuhai Jia, and Hongqiang Yu
In digital holography, the inherited speckle noise degrades imaging quality due to the coherent laser source. To overcome this problem, a hybrid method for speckle noise reduction is presented by combining a novel angular diversity approach with the block-matching and 3D filtering (BM3D) algorithm. A serial of holograms is first captured by the proposed recording approach, and then the image with high signal-to-noise ratio is obtained by averaging multiple reconstructed intensity images. Finally, the residual noise in the averaged image is further eliminated by the BM3D filtering algorithm. The speckle noise is significantly suppressed, and a nearly speckle-free image can be obtained. Experimental results demonstrate the effectiveness of the proposed method.
Crafting a 1.5 µm pixel pitch spatial light modulator using Ge2Sb2Te5 phase change material [Invited]
Yong-Hae Kim, Seong M. Cho, Kyunghee Choi, Chi Young Hwang, Gi Heon Kim, Sanghoon Cheon, and Chi-Sun Hwang
For this research, we have developed key technologies for a 1.5 µm pixel pitch spatial light modulator (SLM) using ${\rm{Ge}_{2}}{\rm{Sb}_{2}}{\rm{Te}_{5}}$ (GST) phase change material. To uniformly modulate each pixel, we designed a lateral pixel structure in which a heating current flows through a bottom indium tin oxide layer. To check hologram reconstruction both after multilevel fabrication processes and before implementing full source and driver circuits, we fabricated an $8\,\,{\rm{K}} \times 2\,\,{\rm{K}}$ hologram on the topology by changing the GST film's phase using laser irradiation. To overcome the limitation of SLM size, we tested a physical tiling structure and found that flatness of tiled SLMs was the most important factor in the realization of holographic displays.
Iterative phase retrieval for digital holography: tutorial
This paper provides a tutorial of iterative phase retrieval algorithms based on the Gerchberg–Saxton (GS) algorithm applied in digital holography. In addition, a novel GS-based algorithm that allows reconstruction of 3D samples is demonstrated. The GS-based algorithms recover a complex-valued wavefront using wavefront back-and-forth propagation between two planes with constraints superimposed in these two planes. Iterative phase retrieval allows quantitatively correct and twin-image-free reconstructions of object amplitude and phase distributions from its in-line hologram. The present work derives the quantitative criteria on how many holograms are required to reconstruct a complex-valued object distribution, be it a 2D or 3D sample. It is shown that for a sample that can be approximated as a 2D sample, a single-shot in-line hologram is sufficient to reconstruct the absorption and phase distributions of the sample. Previously, the GS-based algorithms have been successfully employed to reconstruct samples that are limited to a 2D plane. However, realistic physical objects always have some finite thickness and therefore are 3D rather than 2D objects. This study demonstrates that 3D samples, including 3D phase objects, can be reconstructed from two or more holograms. It is shown that in principle, two holograms are sufficient to recover the entire wavefront diffracted by a 3D sample distribution. In this method, the reconstruction is performed by applying iterative phase retrieval between the planes where intensity was measured. The recovered complex-valued wavefront is then propagated back to the sample planes, thus reconstructing the 3D distribution of the sample. This method can be applied for 3D samples such as 3D distribution of particles, thick biological samples, and other 3D phase objects. Examples of reconstructions of 3D objects, including phase objects, are provided. Resolution enhancement obtained by iterative extrapolation of holograms is also discussed.
Relationship between the source size at the diffuser plane and the longitudinal spatial coherence function of the optical coherence microscopy system
Kashif Usmani, Azeem Ahmad, Rakesh Joshi, Vishesh Dubey, Ankit Butola, and Dalip Singh Mehta
Coherence properties of light sources are indispensable for optical coherence microscopy/tomography as they greatly influence the signal-to-noise ratio, axial resolution, and penetration depth of the system. In the present paper, we report the investigation of longitudinal spatial coherence properties of a pseudothermal light source (PTS) as a function of the laser spot size at the rotating diffuser plate. The laser spot size is varied by translating a microscope objective lens toward or away from the diffuser plate. The longitudinal spatial coherence length, which governs the axial resolution of the coherence microscope, is found to be minimum for the beam spot size of 3.5 mm at the diffuser plate. The axial resolution of the system is found to be equal to an $\sim{13}\,\,{\rm \unicode{x00B5}{\rm m}}$ at 3.5 mm beam spot size. The change in the axial resolution of the system is confirmed by performing the experiments on standard gauge blocks of a height difference of 15 µm by varying the spot size at the diffuser plate. Thus, by appropriately choosing the beam spot size at the diffuser plane, any monochromatic laser light source can be utilized to obtain high axial resolution irrespective of the source's temporal coherence length. It can provide speckle-free tomographic images of multilayered biological specimens with large penetration depth. In addition, a PTS avoids the use of any chromatic-aberration-corrected optics and dispersion-compensation mechanism unlike conventional setups.
Phase-error correction in digital holography using single-shot data
Samuel T. Thurman
In remote-sensing applications, digital holography data often includes both phase errors from atmospheric turbulence and fully developed laser speckle from rough objects. When processing single-shot data, i.e., data from a single hologram, the high speckle contrast makes it more difficult to correct for atmospheric phase errors compared to scenarios where multiple speckle realizations are available for processing. A Bayesian phase-error correction algorithm [J. Opt. Soc. Am. A 34, 1659 (2017) [CrossRef] ] was recently developed for use with single-shot data. The features of this approach are discussed and used to implement an alternative algorithm based on image-sharpness maximization. Algorithm performance is tested using simulated data for a range of signal-to-noise ratios (SNRs) and turbulence conditions. Using a combination of appropriate parameterization of the phase-error estimates and spatial binning for speckle-contrast reduction, the image-sharpness algorithm achieves performance comparable (better in the high-SNR regime but worse in the low-SNR regime) to the Bayesian approach. Limited experimental results are also presented.
From Fienup's phase retrieval techniques to regularized inversion for in-line holography: tutorial
Fabien Momey, Loïc Denis, Thomas Olivier, and Corinne Fournier
This paper includes a tutorial on how to reconstruct in-line holograms using an inverse problems approach, starting with modeling the observations, selecting regularizations and constraints, and ending with the design of a reconstruction algorithm. A special focus is placed on the connections between the numerous alternating projections strategies derived from Fienup's phase retrieval technique and the inverse problems framework. In particular, an interpretation of Fienup's algorithm as iterates of a proximal gradient descent for a particular cost function is given. Reconstructions from simulated and experimental holograms of micrometric beads illustrate the theoretical developments. The results show that the transition from alternating projections techniques to the inverse problems formulation is straightforward and advantageous.
Two improved defocus quantitative phase imaging methods: discussion
Yijun Bao and Thomas K. Gaylord
Multifilter phase imaging with partially coherent light (MFPI-PC) and phase optical transfer function recovery (POTFR) are two viable defocus-based, two-dimensional quantitative phase imaging (QPI) methods. While both methods use transfer function inversion, MFPI-PC is based on the in-focus intensity derivative, while POTFR is based on the intensity difference between symmetrically defocused images. This paper compares and contrasts MFPI-PC and POTFR. Six disadvantages (five in MFPI-PC and one in POTFR) are identified. Improvement strategies to overcome each of the six shortcomings are identified and implemented, and both methods are shown to be clearly improved. The revised MFPI-PC is shown to be more accurate than the original MFPI-PC and generally more accurate than the revised POTFR. The revised POTFR is shown to be inherently faster than the original POTFR and also slightly faster than the revised MFPI-PC.
SNR advantage of anisotropy in oceanic optical wireless communications links
Yahya Baykal
Signal-to-noise ratio (SNR) of an optical wireless communication (OWC) link that operates in anisotropic oceanic turbulence is evaluated. To find the SNR advantage of the anisotropy in the oceanic turbulent medium, SNR in anisotropic oceanic turbulence is normalized by the SNR in isotropic oceanic turbulence. The dB values of this normalized SNR are examined versus the oceanic turbulence parameters of the ratio of temperature to salinity contributions to the refractive index spectrum, the rate of dissipation of mean-squared temperature, the rate of dissipation of kinetic energy per unit mass of fluid at various oceanic anisotropic factors, the avalanche multiplication factors, the radii of receiver aperture, link lengths, and detector responsivity values. It is found that as the oceanic turbulence becomes more anisotropic, at any link parameter, the SNR of the OWC link becomes advantageous over the isotropic counterpart.
Some theorems on "arctic mirages": hillingar effect and superior mirages
L. Dettwiller
In a stratified or a spherically symmetric atmosphere, we consider some cases where a curved light ray connects two points, $A$ and $S$, on the sea or the ground, at the same height as in some cases of superior mirages or "arctic mirages." We study the range $D$ of this ray (i.e., the geodesic distance between $A$ and $S$) as a function of ${\alpha _S}$, the ray inclination with respect to the vertical at $A$ or $S$. The fundamental expression of $D$ is an improper integral. We show that a change of variable, also used to calculate the astronomical refraction, usually gives a well-behaved integral. In a spherically symmetric atmosphere, this happens when the refraction coefficient exceeds unity on the entire ray, producing a hillingar effect (alias strong looming for an erect image) or superior mirages. We then find a nice expression of ${{{\rm d}D}/{{\rm d}{\alpha _S}}}$, which is usually negative. Inverted images (i.e., mirages in the strict sense) show up when ${{{\rm d}D}/{{\rm d}{\alpha _S}}}$ is positive; for this, we find a necessary condition in each atmospheric model. The strength of these results comes from not requiring precise knowledge of the ray paths.
Effective tensor approach for simulating the propagation of partially coherent Hermite–sinh–Gaussian beams through an ABCD optical system in turbulent atmosphere
Hongjie Ma, Jinsong Li, and Pengjie Sun
An efficient tensor approach is used to simulate the propagation of partially coherent Hermite–sinh–Gaussian (H–ShG) beams through an ABCD optical system in a turbulent atmosphere. Analytical expressions for the average intensity are derived. The properties of the average intensity of the beam are studied numerically. It is found that the average intensity distribution of the beam is almost independent of the structure constant of turbulence when the spatial coherence length is very small and the beam with larger spatial coherence length is less affected by the turbulent atmosphere. Moreover, the transition from an H–ShG beam into a Gaussian beam becomes quicker with smaller beam order and smaller Sh parameters.
Average capacity analysis of underwater optical wireless communication links over anisotropic strong oceanic turbulence channels
Muhsin Caner Gökçe
The effect of anisotropy on the channel capacity of underwater optical wireless communication (OWC) links operating in strong oceanic turbulence is investigated. We consider a Gaussian beam wave propagating through a turbulent oceanic fading channel whose statistical distribution is modelled by a gamma–gamma function. To numerically calculate the channel capacity of the OWC system, related entities of the propagating beam such as coherence length, received signal intensity, and the scintillation index are formulated. Further, in this way, the received signal-to-noise ratio and fading distribution of the channel are obtained. The channel capacity examinations analyzed in this paper depend on the oceanic turbulence parameters, especially for the anisotropic factor of oceanic turbulence, and also depend on the other system parameters such as wavelength, link distance, noise variance, and the quantum efficiency of the photodetector.
Scintillation index of an optical wave propagating through moderate-to-strong oceanic turbulence
Xiaohui Luan, Peng Yue, and Xiang Yi
In this paper, based on the extended Rytov theory that combines modified large-scale and small-scale amplitude spatial-frequency filters, we theoretically derive the scintillation index (SI) of the plane and spherical waves by means of the approximate oceanic refractive-index spectrum with the variable eddy diffusivity ratio propagating through moderate-to-strong oceanic turbulence. The mean bit-error rate (BER) of the underwater optical wireless communication systems is analyzed by use of the predicted SI and the gamma–gamma distribution model. Numerical results show that the obtained SI models are in good agreement with the results in weak-fluctuation regions. Also, we find that in weak turbulence, the mean BER drops sharply with the increase in mean signal-to-noise ratio, while in moderate-to-strong turbulence, the situation is opposite. We also note that the mean BER differs between the cases of unity and the variable eddy diffusivity ratio.
Tunneling optical resonances in light–droplet interactions: simulations of spaceborne cloud droplet observations
Rouba Yaacoub, Olivier Pujol, and Philippe Dubuisson
A fruitful approach for light–droplet interaction in atmospheric optics, the quantum optical analogy combined with partial wave analysis, is used to characterize (location, width) very sharp tunneling optical resonances (TORs). For this purpose, a fast and flexible technique of computation, the transfer matrix method, has been developed; it is described herein. This paper proposes explicit calculations of TORs, considering isolated droplets and a droplet population, and so goes further than earlier studies. Applied in the context of POLDER observations, from the visible to the near infrared, it is shown that TORs enhance cross sections with respect to Mie's theory as currently computed in atmospheric optics. Precisely, for a typical warm cloud droplet population, this enhancement can reach almost 30% in the case of absorption. Scattering and extinction cross sections are also higher than those of Mie's theory, but to a lesser extent. As a conclusion, it is suggested that tunneling should be taken into account more explicitly when addressing light scattering by droplets. No scattering inversion technique is investigated in this paper, but for the time being, the results presented can be used as look-up tables (at least orders of magnitude) for practical computations in atmospheric remote sensing. Finally, the approach presented herein is proposed as a perspective to be used in different situations involving other spherical (or almost spherical) scatterers that otherwise should be addressed approximately.
Coherence modification and phase singularities on scattering by a sphere: Mie formulation
Hugo F. Schouten, David G. Fischer, and Taco D. Visser
When light that is spatially partially coherent, such as sunlight, is incident on a sphere, the scattered field exhibits surprising coherence properties. The observed oscillatory behavior with deep minima means that the field in certain pairs of directions is highly correlated, whereas in others, it is essentially uncorrelated, and can even have correlation singularities. Because any subsequent scattering event is strongly affected by the state of coherence, these results are particularly important for multiple scattering in discrete disordered media.
Efficient propagation of the coherency matrix inspired by plenoptic field representations of nonparaxial Wigner functions
Jeremy Wittkopp and Jonathan C. Petruccelli
The angle-impact Wigner function (AIWF) is a tool that assigns weights to rays in a way such that ray tracing can be used to exactly model the irradiance and polarization properties of nonparaxial, partially coherent, partially polarized electromagnetic fields. Although the AIWF offers computational advantages over more conventional wave propagation integrals, in practice, the large number of rays that must be traced has proved to be a significant bottleneck. We demonstrate an efficient method to implement AIWF propagation algorithms inspired by a plenoptic field representation. We illustrate the method by computing irradiance and polarization properties of several paraxial and nonparaxial fields.
Metameric effects on peridot by changing background color
Jun Tang, Ying Guo, and Chang Xu
Peridot's yellowish-green color is not only produced by ${{\rm Fe}^{2+}}$ but is also influenced by background, observer, illuminance, and color temperature of the light source. In this research, we studied the most effective background for peridot color grading under a 6504K fluorescent lamp. Ninety-five gem-quality peridot samples from China, Pakistan, and Myanmar were studied using electron probe micro-analyzer, spectrophotometer, Munsell neutral gray backgrounds, and standard gold alloy backgrounds. The results provided the color effects of 24K, 22K, 20K, 18K, and 16K gold alloy backgrounds and Munsell neutral gray backgrounds on the peridot's color. It was found that the Munsell N9 background seems to be the most effective background for peridot color grading. Using the Munsell N9 background, peridot colors were graded into three levels from good to bad: Fancy Intense, Fancy Deep, and Fancy by using K-means clustering analysis and Fisher discriminant analysis methods. The peridot's color level reverse phenomenon should be considered when the background varies between Munsell N7 and N9 gray.
Propagation properties of radially and azimuthally polarized chirped Airy–Gaussian vortex beams through slabs of right-handed materials and left-handed materials
Guowei Liang, Jinxin Li, Zhiming Luo, Jinyu Luo, Yanquan Chen, and Dongmei Deng
By using Huygens–Fresnel diffraction integral formula and the transfer matrix method, the analytical expression of radially and azimuthally polarized chirped Airy–Gaussian vortex beams through left-handed materials and right-handed materials can be obtained. We study the effects of the chirp factor and the distribution factor on the radially and azimuthally polarized chirped Airy–Gaussian vortex beams in the propagation process, including the light intensity, the phase distribution, the propagation path, the peak intensity, and the radiation force. The focal position of the beams can be adjusted by the chirp parameter.
Analysis of volume-phase-grating characteristics that a variety of refractive index distributions influence. Part 2: Analysis of spectral bandwidths and angular bandwidths, and the derivation of these equations
K. Nakajima
To expand the spectral bandwidths with high diffraction efficiency of volume phase (VP) gratings, it is important to know the influence of a variety of refractive index distributions (RIDs) inside the recording material on the bandwidths. The influence of various graded types of RIDs on the full width at half the maximum of the spectral bandwidth (${\lambda _{\rm FWHM}}$) and the angular bandwidth (${\theta _{\rm FWHM}}$) is investigated in the Bragg regime. It becomes clear that various graded types of RIDs influence their bandwidths and the characteristics, and the combination of the RIDs and refractive index modulation (${{ n}_m}$) is the most important factor for obtaining the large bandwidths of VP gratings. Theoretically, the ${\lambda _{\rm FWHM}}$ are obtained as the values of 149.7 nm and 257.6 nm (${{ n}_m} = {0.045}$) for the wavelengths of 900 nm and 1550 nm, respectively. Furthermore, I have succeeded in developing the expression for ${\lambda _{\rm FWHM}}$ and ${\theta _{\rm FWHM}}$, using the proportional characteristics of VP gratings investigated in this work. The correlative coupling-length coefficients "G-factors" devised as a variety of RID functions in the previous paper are introduced into them. It is apparent that the derived equations of the bandwidths can be adapted to any graded type of RID that changes continuously from a triangular type to a rectangular type of VP grating, which has not been reported yet. The equations have made it easy to design ${\lambda _{\rm FWHM}}$ and ${\theta _{\rm FWHM}}$ of VP gratings.
Paraxial lens design of double-telecentric anamorphic zoom lenses with variable magnifications or fixed conjugate
Jinkai Zhang, Xue Wang, Xiaobo Chen, Fajia Li, Haining Liu, Huanyong Cui, and Xuan Sun
This paper presents a paraxial lens design method for anamorphic zoom lenses with double telecentricity. Four types of such lens systems are provided, which are the Y-X-Y-Y type, the Y-Y-Y-X type, the Y-X-Y-X type, and the Y-X-X-Y type. For each lens type, it can work in two different conditions: (a) the distance between the object and the image is fixed during anamorphic zooming, or (b) the magnifications in the tangential plane and the sagittal plane can be changed independently by changing the interval lens distances. For each condition, given the optical power of each lens component and the design parameters, such as the total length, the magnifications in the tangential plane and the sagittal plane, and the anamorphic ratio, formulas determining the interval distances between lens components, the object position, and the stop position are provided. Eight examples of double-telecentric anamorphic zoom lenses are provided, and all the examples are tested in Zemax, which shows the validity of the proposed design method.
Estimating field-dependent nodal aberration theory coefficients from Zernike full-field displays by utilizing eighth-order astigmatism
Eric M. Schiesser, Aaron Bauer, and Jannick P. Rolland
When using freeform surfaces in optical design, the field dependence of the aberrations can become quite complex, and understanding these aberrations facilitates the design process. Here we calculate the field dependence of low-order Zernike astigmatism (Z5/6) up to the eighth order in nodal aberration theory (NAT). Expansion of NAT astigmatism terms to the eighth order facilitates a more accurate fit to the Zernike astigmatism data. We then show how this estimated field dependence can be used to quantitatively analyze a freeform telescope design. This analysis tool adds to the optical designer's arsenal when up against the challenge of designing with freeform optics.
Predictive search algorithm for phase holography
Peter J. Christopher, Youchao Wang, and Timothy D. Wilkinson
We present an algorithm for generating high-quality holograms for computer generated holography: holographic predictive search. This approach is presented as an alternative to traditional holographic search algorithms such as direct search (DS) and simulated annealing (SA). We first introduce the current search-based methods and then introduce an analytical model of the underlying Fourier elements. This is used to make prescient judgments regarding the next iteration of the algorithm. This approach is developed for the case of phase-modulating devices with phase-sensitive reconstructions. When compared to conventional iterative approaches such as DS and SA on a multiphase device, holographic predictive search offered a fivefold improvement in quality as well as up to a 10-fold improvement in convergence time. This comes at the cost of an increased iteration overhead.
Numerical approach for reducing out-of-focus light in bright-field fluorescence microscopy and superresolution speckle microscopy
Awoke Negash, Thomas Mangeat, Patrick C. Chaumet, Kamal Belkebir, Hugues Giovannini, and Anne Sentenac
The standard two-dimensional (2D) image recorded in bright-field fluorescence microscopy is rigorously modeled by a convolution process involving a three-dimensional (3D) sample and a 3D point spread function. We show on synthetic and experimental data that deconvolving the 2D image using the appropriate 3D point spread function reduces the contribution of the out-of-focus fluorescence, resulting in a better image contrast and resolution. This approach is particularly interesting for superresolution speckle microscopy, in which the resolution gain stems directly from the efficiency of the deconvolution of each speckle image.
Linearly polarized laser beam with generalized boundary condition and non-paraxial corrections
Huan Wang, Loïc Amoudry, Kevin Cassou, Kevin Dupraz, Wenhui Huang, Aurélien Martens, Daniele Nutarelli, Chuanxiang Tang, Lixin Yan, and Fabian Zomer
Linearly polarized Gaussian beams, under the slowly varying envelope approximation, tightly focused by a perfect parabola modeled with the integral formalism of Ignatovsky are found to be well approximated with a generalized Lax series expansion beyond the paraxial approximation. This allows obtaining simple analytic formulas of the electromagnetic field in both the direct and momentum spaces. It significantly reduces computing time, especially when dealing with the problem of simulating direct laser acceleration. The series expansion formulation depends on integration constants that are linked to boundary conditions. They are found to depend significantly on the region of space over which the integral formulation is fit. Consequently, the net acceleration of electrons initially at rest is extremely sensitive to the chosen set of initial parameters due to the extreme focusing investigated here. This suggests avoiding too tight focusing schemes in order to obtain reliable predictions when the process of interest is sensitive mainly to the field and not the intensity.
Efficient full-vectorial modal analysis based on immersed interface method for dielectric chiral optical fibers
Yusheng Cao
This paper presents the application of an immersed interface method in efficient modal analysis of dielectric chiral optical fibers. Under the easily implemented finite-difference framework, the second- and fourth-order accuracy formulations are developed, which in principle are applicable for automatically computing various types of modes in dielectric chiral optical fibers with an arbitrary, electromagnetic parameters piecewise constant profile. To validate the developed formulations, numerical examples are given for the guided, leaky, and surface modes in dielectric chiral step-profile and Bragg fibers.
Divide and conquer algorithm for nondiffracting beams
Alberto F. Martínez-Herrera, Armando Céspedes-Mota, and Servando Lopez-Aguayo
We put forward a robust technique to encode a plethora of arbitrary images as nondiffracting beams by optimizing their respective phase components. This technique works directly under the constraint of a ring of infinitesimal width in Fourier space. The procedure reported is based on a stochastic direct search and global optimization: the differential evolution method. Unlike previous methods reported, the present approach is also able to optimize the spatial frequency of the image used. Remarkably, this technique also demonstrates that it is possible to encode even more arbitrary images on demand into nondiffracting forms by allowing a segmentation of the profile. We provide some codes to generate nondiffracting beams by using this algorithm.
Calculating and fitting morphology-dependent resonances of a spherical particle with a concentric spherical shell
Benjamin Vennes and Thomas C. Preston
Determining the size and composition of core-shell particles using morphology-dependent resonances (MDRs) is a computationally intensive problem due to the large parameter space that needs to be searched during the fitting process. Very often, it is not even practical to consider a reasonable range of physical parameters due to time constraints, leading to restrictive assumptions concerning the system being studied. The lengthy computational time is so limiting that there has, to date, to the best of our knowledge, been no comprehensive study of fitting measured MDRs for core-shell particles. In this work, we address the issue of fitting speed by developing an algorithm that (i) reduces the multi-dimensional grid search to a one-dimensional search using a least squares method and (ii) implements a new method for calculating MDRs that is much faster than previous methods. With the program presented here, we analyze the best-fits for core-shell MDRs across a large range of physically relevant scenarios using noise levels typical for conventional spectroscopic experiments. For many cases, it has been found that excellent fits can be quickly determined. However, there are also some surprising situations where accurate best-fits are not possible (e.g., if only one mode order is present in the measured MDR set).
Classical optics in France: introduction
Yannick Berthoumieu, Christine Fernandez-Maloigne, David Alleysson, Sylvain Gigan, and Olivier Haeberlé
This special issue of the Journal of the Optical Society of America A (JOSA A) is devoted to the wide array of French researchers from universities and state research organisms, offering them the opportunity to share and showcase their current research in the fields of optics and imaging sciences to the global community.
Versatile inversion tool for phaseless optical diffraction tomography
Kevin D. Unger, Patrick C. Chaumet, Guillaume Maire, Anne Sentenac, and Kamal Belkebir
Optimization of fast spectrally encoded Mueller polarimeters for real-time monitoring
Sylvain Rivet, Matthieu Dubreuil, and Yann Le Grand
Versatile transmission/reflection tomographic diffractive microscopy approach
Ludovic Foucault, Nicolas Verrier, Matthieu Debailleul, Jean-Baptiste Courbot, Bruno Colicchio, Bertrand Simon, Laurent Vonna, and Olivier Haeberlé
Confidence-based dynamic optimization model for biomedical image mosaicking
Romuald Perrot, Pascal Bourdon, and David Helbert
Modeling, measuring, and using BRDFs: significant French contributions
Lionel Simonot, Gael Obein, Benjamin Bringier, and Daniel Meneveaux
Angular reflectance model for ridged specular surfaces, with comprehensive calculation of inter-reflections and polarization
Dorian Saint-Pierre, Pierre Chavel, Lionel Simonot, and Mathieu Hébert
Clinical evaluation of a device providing simultaneous white-light and fluorescence video streams as well as panoramic imaging during fluorescence assisted–transurethral resection of bladder cancer
Marine Amouroux, Julia Salleron, Cécile Huin-Schohn, Sharib Ali, Stéphane Berthaud, Philippe Rizo, Sylvain Schneider, Christine Vever-Bizet, Geneviève Bourg-Heckly, François Guillemin, Patricia Le Coupanec, Ernest Galbrun, Joël Daouk, Christian Daul, Walter Blondel, and Pascal Eschwège
Advancing Fourier: space–time concepts in ultrafast optics, imaging, and photonic neural networks
Luc Froehly, François Courvoisier, Daniel Brunner, Laurent Larger, Fabrice Devaux, Eric Lantz, John M. Dudley, and Maxime Jacquot
Influence of the CTAB surfactant layer on optical properties of single metallic nanospheres
Artur Movsesyan, Sylvie Marguet, Alina Muravitskaya, Jérémie Béal, Pierre-Michel Adam, and Anne-Laure Baudrion


This weekend we decided to head out to the fair! Let's be real...I was going to try all the food. And of course the family fun was a plus...but that food. Some think it's gross, but I get giddy with excitement over fair food! I started off strong with a corn dog and fresh squeezed lemonade right when we walked in the gate, and I certainly was not disappointed. We had a lot of fun just people watching and checking out all the sites. We looked at the Clydesdales for awhile...Manny was fascinated. They are so beautiful and just huge! I love watching them prance...I know there's an official name for it, but I can't think of it. They also had a little petting zoo where you could feed the animals. They had goats, llamas, kangaroos, a zebra, and a few other things. The zebra looked depressed and never would come to the edge...poor guy. But it was fun to see Manny interact with the animals. He wasn't sure about some of them, but liked it overall.
Then when we were leaving there, The Village People were coming on stage, so we decided to check that out for a little bit. Talk about entertainment! A.) How OLD are these guys?! and B.) Definitely some of the best people watching I've experienced in a long time. Am I the only one who likes to people watch? Anyway, we only stayed for 2 songs but Manny really liked it. In the bottom right picture he was jamming out to Macho Man but it was hard to get a picture because he wouldn't sit still. Great times at the fair...I'm so glad we went.
September 17 - This is me and my friend Cassie right before the wedding I was in that day. The bride paid for us to have our make-up done, and I will say I gasped when I looked in the mirror after she finished. I thought it was way too much make-up, but I got used to it and it photographed well I think. I need to get better about actually doing my make-up (I don't mean this much) but I'm just not good at it....specifically eye make-up. If you have any tutorials you'd recommend, please do share!
September 18 - We stayed at a hotel in Tulsa so we wouldn't have to drive home after the wedding, and this is my dad and Manny at breakfast the next morning. It was a little cold so I tried to get Manny to wear his hood, but he was not going for it.
September 19 - My brother, sister-in-law, and their daughters Lani & Laci came to OKC for some appointments. You might remember Laci got a cochlear implant last November, and next month she is going to get the other ear implanted. She is the funniest thing, and Lani is so sweet and mature...I just love them both to pieces. We were able to have lunch with them while they were here, and it was so much fun! Manny was sad to see them go.
September 20 - We found a great new grocery store to shop at, and Manny LOVES it because it has a car thing in it. He steered both steering wheels almost the whole time. Anything with a steering wheel he loves right now.
September 21 - This was the day we were at the park and saw the dog. Shortly after that, Manny was running and took a little fall, so Patrick picked him up to calm him down. I couldn't resist this picture of them cuddling.
September 22 - Manny shopping at Target and munching on some Earth's Best sweet potato cinnamon puffs. Those things are good!
September 23 - We went to the mall this evening and Manny was riding in the stroller. A sales lady walked up to us with this firetruck buggy thing and offered to let us use it. We said no, that's okay...but Manny had other plans. Yes, we gave in and let him ride in it and he was absolutely thrilled.
Adorable!! Seems like Manny had a great time at the fair. I second @ Katie's comment!! One of the my favorite reasons to go to the fair is the FOOD!! :) Looking forward to taking my little one this year...Texas State fair opens this FRIDAY...can't wait!!
Great fair pictures! We finally bought some sheets from Potterybarn when they were offering a great deal and now I dont know if I will ever be able to buy the regular sheets again they are wonderful!
Oh those buggies shaped like cars and trucks! Last year on our vacation Ava had a perfectly good stroller at the outlet mall and was a holy terror - so I paid for one of those dumb buggies and got to shop in peace the next 2 hours! Money well spent! Glad you guys seem to be settling in well in OK! I LOVE seeing Patrick more b/c I know that means he's not working as much! Happy for y'all, friend!!!
Looks like fun at the fair. Really cute photos.
Love some fair food!! Vinegar Fries!!! Cute Pics!
Love your blog:) I found it while I was pregnant with my 1st son and was looking for new mommies with baby boys in the bloggy world.
I buy all my sheets from the Company Store catalog (or their online site). They have such a wide selection of colors, styles and are always great quality. With the holiday season coming up, I love throwing some cute decorative sheets on the beds...it adds just a little bit more festivity every time I turn back the covers. Last year, Target had the cutest and CHEAPEST set of flannel Christmas/winter themed sheets. They were surprisingly soft, and I ended up buying several sets b/c I knew anything that inexpensive would not stand up for the next season.