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Faster Web Development with Virtual Machines
Thu Oct 7, 2010, 2:23 PM by jekor
At deviantART, every developer gets their own virtual machine. Our VMs are our private laboratories. In them we work, test, and experiment, with no fear of harming the site.
The VM is also the most significant change we've made to our deployment chain in the past 6 years.
How Does a Virtual Machine Improve Development?
Fewer Commits
If you have to commit to the repository on a staging server every time you need to test a change, you end up with a lot of commits. Not only does this take time, but it creates a lot of noise. Before the VM, a single change could result in as many as 20 commit messages. We found it very difficult to keep track of what was changing on the site. Now, developers tend to commit code in single logical chunks with meaningful messages.
Reduced Contention for the Staging Server
Staging acts as a final check for code that's already been tested on a VM. It uses the production databases and other production daemons, and it gives us a good idea of what performance will be like. But it's a shared resource, and when it's locked it can very quickly prevent other developers from getting work done. Fewer, more well-tested commits keep the staging server in a known-good state for longer periods of time.
Freedom to Experiment
Some code changes would be too tedious or dangerous to test on the staging server. Branches can help in some cases, but you also need to isolate or create copies of resources (such as the database), which can be impractical and time-consuming. Better to test the changes on a machine that doesn't have a connection to anything in production.
This isolation of the VM also helps developers learn new systems faster. Developers can break their VMs like kids breaking apart their parents' expensive electronics to figure out how they work. The worst that can happen is that the developer has to build a new VM.
How the VM is Made
Almost all deviantART servers run off of a common base netboot image. We took this netboot image, converted it to a VMWare disk image, and added a boot loader. Then, we configured it to download and install the same binary packages used by the live servers. Most packages require some conditional tweaks in their configuration files, but they're all relatively straightforward.
Creating a new VM is mostly automatic. A developer downloads a disk image, adds it to VMWare, and then runs a setup script from within the VM. The script downloads the correct versions of the necessary binaries, configures them, and starts any associated daemons. All that's left for the developer is to mount the source code directory on their host via SSHFS.
What to Do About Databases
Accessing the production databases from the VM is out of the question. The VM cannot be allowed to make changes to any production resource. Additionally, the added latency would make testing on the VM much more tedious. For example, if a page on production runs 45 queries in 30ms, the same page on the VM would take no less than 2 seconds to run the same queries (assuming 50ms of round-trip latency). Instead, we have to bring a copy of the databases to the VM.
Imagine a parallel universe in which deviantART only has a handful of members. That's essentially what the VM is. We take more than 2TB of database data and extract the approximately 50MB used by just the developers' accounts.
We wrote a program that pulls this data from the production database servers nightly. The program is driven by a configuration file editable by developers. The file begins with a list of usernames; only data on these users will be pulled. To protect users' data, we only add developer usernames. Next, the file defines how various data is related (sort of like foreign key relations, but not quite). These relationships are used to define the subsets of data required to be pulled from each of the database tables.
As the program runs, it outputs a .sql (text) file resembling the output of mysqldump. When complete, it places the file on a server and rotates the previous files as backups. At any time, a developer can run a command to automatically update their VM's database with the latest data (or optionally roll it back to some point in the past).
What to Do with Resources
Even after reducing the database to 50MB, the associated image files would still be too large to download and store locally. Luckily, we don't need to. Instead, requests for images and other non-CSS/JS files are proxied (transparently) by Apache to the live site. For us, this is simplified by the fact that these files are hosted on distinct subdomains, but you can achieve the same with any regular directory structure.
Sometimes, though, you don't want the request to be proxied. For example, when testing uploads and submissions, we don't want to have to upload the test file to the site itself. Instead, we upload it to the VM. Apache, instead of proxying the request immediately, checks to see if the file exists locally first and serves it from the VM filesystem if it does.
Hosting the VM on a Separate Domain
Originally, we edited our /etc/hosts file to point deviantart.com to the VM when we wanted to work with it. But doing so was quite a hassle, especially considering you had to switch browsers or use a cookie switching plugin to avoid cookie collisions. Also, it wasn't always clear if you were browsing the VM or the live site. So we decided to move the VM to its own domain: deviantart.lan.
deviantART is unusual in that it has millions of subdomains: 1 for each registered member, as well as a collection of reserved subdomains. Enumerating all the possible subdomains in /etc/hosts would be tedious and error prone. So instead, we setup an instance of tinydns on the VM to answer requests for *.deviantart.lan. Tinydns can be configured to then proxy DNS requests for domains it's not responsible for to another DNS server. Or, if you're using OS X you can create a file in /etc/resolver to tell OS X to pass any (and only) requests for deviantart.lan domains to the VM.
Avoiding Code Changes
Making the VM respond to deviantart.lan posed a new problem. All of our code was written with the assumption that we're responding to deviantart.com. We first tried removing all literal occurrances of the string "deviantart.com" from the code and replacing it with a constant/global variable reference (which could vary between the VM and production). But there were too many places in the code to change, and it would be easy to forget and commit a literal "deviantart.com" later.
We decided to move back to solve the problem: we'd translate the name at the HTTP level. We looked first at using an Apache directive or extension. Unfortunately, none handled rewriting both the body and the headers (necessary for catching cookies and redirects) in both directions. So we wrote a daemon: tcpbf.
tcpbf
tcpbf is our "TCP Bi-directional Filter". It's a simple program that allows us to make regexp-based replacements in the requests to and responses from the VM. For example, we change "deviantart.lan" to "deviantart.com" on the way in and vice versa on the way out. Additionally, we strip any Accept-Encoding header on requests to prevent the response coming back as gzipped data (which we couldn't do text replacement on).
This explains why we chose ".lan" as the new TLD for the virtual deviantART: keeping it to 3 letters keeps the Content-Length of the response correct. If we didn't, we'd have a mismatch that would break browsers that use chunked transfer encoding, like Chrome and IE.
To handle SSL traffic, we have 2 copies of stunnel running with tcpbf sitting between them. That way both the browser and Apache see SSL packets while tcpbf sees cleartext.
Getting to 100% Accurate Emulation
The VM isn't perfect. Sometimes it's missing data. Occassionally changes are made on production that aren't compatible with it. Sometimes we hit an edge case on the VM we wouldn't have hit on the productions servers due to a difference in resource limits, and vice versa. Luckily, the emulation doesn't have to be 100% accurate to produce benefits. The most important thing we did was make it good enough that developers wanted to use it. Ever since everyone has adopted it, it's been improving naturally over time.
Like the idea of working on stuff like this? Check out the open developer positions at deviantART.
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Faster Web Development with Virtual Machines October 7, 2010 37 Comments 1 Favourite
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I am very a systematic person (I guess I am). If something is not in order, I will rearrange it. This also apply to my drives letter in My Computer. Sometimes my Windows XP will change my USB drive letter and not in alphabetically order. Sometimes the Mobile Connect drive letter is J: and sometimes it is K:. Depending on which device it detects first.
I prefer for the Mobile Connect drive letter to stick with J: so if I insert a thumb drive, Windows will set the drive letter accordingly. J:, K:, L: and so on. But if Mobile Connect drive letter is not J:, I will change the drive letter by using Computer Managementtool.
Go to Control Panel > Administrative Tools > Computer Management. Now, under Storage, click on Disk Management. It will display all drives and removable storages found on your PC.
Let say I want to change my thumb drive letter which is Cypher256Mb (K) to Cypher256Mb(L). I right click the volume and choose Change Drive Letter and Paths… Then I click on the Change button and choose L: from the dropdown list. And then, click Ok to accept the changes. Now, my thumb drive letter has changed to L:.
It is really easy to change drive letter. But be warned! Don't ever change the Windows drive letter. I don't know what will happen but I am sure you will be in lot of trouble if you do so.
Awesome info, was looking for this for a while.
THANK YOU! Been wondering how to do this for a while! I have my music on an external harddrive, and sometimes my laptop decides it wants to toy with my emotions by changing the drive directory just so iTunes can't find my music, causing mayhem for me and my iPod. Score total is now Stu: 2, Laptop: 1569.
Thanx u saved ma day. All ma files were hidden bt I was able to unhide them in a snap.


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About Xtex » Meet The Team
Polythene Films
Dan Bentley - Wilsden/Huddersfield
When Dan joined the company in 1992, he only planned to stay for 4-6 weeks until he got a 'proper job'!
His first jobs included sweeping up, going to the shop, making the tea and coffee and occasionally running machines.
Eventually he got the opportunity to run the machines full time, and then after 18 months he joined the maintenance team.
In 2002 he became involved with the office side of the company and in 2006 he was promoted to General Manager of Xtex.
Dan now has oversight of Xtex Polythene Ltd, at both the Wilsden and Huddersfield sites.
Daniel Polzella - Wilsden
Daniel joined Xtex in January 2016 as Sales Co-ordinator and took to the role like a duck to water, quickly becoming a well-established member of staff.
He is able to guide customers, who are sometimes unsure of what they require, through the various stages to enable them to obtain the product they need; this can often involve advice on size, thickness and polymer type, as well as sourcing art work and printing plates.
We often hear excellent feedback regarding the service he gives and he has built up an excellent rapport with existing and new customers alike.
Liz Lister - Wilsden
Liz joined Xtex in 1988 as Office Administrator, and has seen many changes in systems and personnel over the years.
Liz is now in charge of the Book-keeping department of the business, a job that suits her perfectly.
She has a great memory regarding customers and has a good working relationship with them all, which makes her an invaluable member of staff.
Rob Bentley - Wilsden/Huddersfield
In 1999, at the ripe old age of 49, after 33 years working in the local wool trade, Rob was asked to join Xtex and BGM, where he quickly reorganised the structure of the company, and put it on a solid foundation.
Rob has now taken a back seat – but this does mean that from time to time he can be a bit of a back-seat driver!
One day he intends to fully retire - although it has been noted that his holidays are becoming longer and more frequent.
Dave Roberts - Huddersfield
Dave started at the Huddersfield site in 1998, initially as a Bagging Machine Operator; he then moved to the Warehouse and soon got the place 'ship shape'.
He then started to work alongside Val in the office when the General Manager was on annual leave, and helped with the production and planning side of the operation.
Dave is now the General Manager at the Huddersfield site.
Val Jaques - Huddersfield
Val started at the Huddersfield site in 1992 in the admin department on a job share basis, but shortly after joining she took the role on full time.
She quickly established herself as a pivotal member of the office team, forging a great working relationship with all the customers.
As we keep updating our office/computer systems, Val has become the 'chief tester'. If it can go wrong, she can make it happen!
Val is also adept at spotting spelling mistakes (mainly Dan's), and correcting everyone's grammatical errors.
Val has become the go-to person if there are any issues to be addressed, given her vast experience
Luke Sutcliffe King
Huddersfield Maintenance

redpajama_set_name: RedPajamaCommonCrawl


A Pomeroy woman who lost her uncle to cancer 10 years ago has decided to give something back to the hospice that cared for him in his dying days.
Elaine Simpson, who works as a community nurse in Moneymore, knows personally the value of the services provided by Southern Area Hospice.
As well as caring for those with cancer, the charity offers palliative care to those suffering from a range of other illnesses such as Multiple Sclerosis, Motor Neurone Disease, HIV and Aids.
But, just to maintain the level of care they now provide, the hospice - which relies heavily on charitable donations - must raise an astonishing £6,301 a day [£2.3m per year].
To help them reach that target the brave nurse has decided to put her own fears aside to take on the biggest challenge of her life - trekking across an active volcano and mountains in Iceland.
"I just want to give something back," she told the Mail.
But the fundraising is only part of the challenge. Elaine will have to cover almost 50km in five days - passing an active volcano and scaling mountains and gorges on her way.
"I am nervous," she told the Mail, "it's a personal challenge as well as everything else.
"I have a fear of heights and I hate flying," she said.


Amadeus Director's Cut (C)2001, Supplementary Material Compilation (C)2009 The Saul Zaentz Company. Package Design (C)2009 The Saul Zaentz Company and Warner Bros. Entertainment Inc. All rights reserved. "ACADEMY AWARDS(R) " is the registered trademark and service mark of the Academy of Motion Picture Arts and Sciences.


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Big-Business Lobby Group Supports So-Called Stimulus and Obamacare and then Has Gall to Complain about Big Government
Posted in Uncategorized on June 24, 2010| Leave a Comment »
Regular readers of this blog know that big corporations often are enemies of free markets and individual liberty. So it is hardly suprising to know that the Business Roundtable, a lobby representing CEOs of major companies, supported the wasteful and ineffective stimulus pprogram in 2009 and the bloated new healthcare entitlement in 2010. Big companies, after all, are quite proficient at working the system to obtain unearned wealth and to rig the rules against smaller competitors.
What is surprising, however, is that representatives of that organization now have the chutzpah to complain about a "hostile environment for investment and job creation." Equally galling, the group has published a document called "Policy Burdens Inhibiting Economic Growth." We've all heard the joke about the guy who murders his parents and then asks the court for mercy because he's an orphan. The Business Roundtable has adopted that strategy, except this time taxpayers are the butt of the joke. Here's an excerpt from the Washington Post report:
The chairman of the Business Roundtable, an association of top corporate executives that has been President Obama's closest ally in the business community, accused the president and Democratic lawmakers Tuesday of creating an "increasingly hostile environment for investment and job creation." Ivan G. Seidenberg, chief executive of Verizon Communications, said that Democrats in Washington are pursuing tax increases, policy changes and regulatory actions that together threaten to dampen economic growth and "harm our ability . . . to grow private-sector jobs in the U.S." …The final straw, said Roundtable president John Castellani, was the introduction of two pieces of legislation, now pending in Congress, that the group views as particularly bad for business. One, a provision of the administration's financial regulation overhaul, would make it easier for shareholders to nominate corporate board members. The other would raise taxes on multinational corporations. The rhetoric accompanying the tax proposals has been particularly harsh, Castellani said, with Democrats vowing to campaign in this fall's midterm elections on a platform of punishing companies that move jobs overseas. …Seidenberg polled the members of the Business Roundtable and a sister organization, the Business Council. The result was a 54-page document, delivered to Orszag on Monday, chock full of bullet points about actions taken or considered by a wide array of executive agencies, including the White House Middle Class Task Force and the Food and Drug Administration. We believe the cumulative effect of these proposals will help defeat the objectives we all share — reducing unemployment, improving the competitiveness of U.S. companies and creating an environment that fosters long-term economic growth," Seidenberg wrote in a cover letter for the document, titled "Policy Burdens Inhibiting Economic Growth."
European Central Bank President Wants to Exacerbate Continent's Fiscal Crisis
Posted in Bailout, Big Government, Centralization, Elitism, Euro, Europe, European Commission, Fiscal Policy, Government Spending, Greece, International bureaucracy, Redistribution, Socialism, Sovereignty, Statism, Tax Competition, Tax Harmonization, Welfare, Welfare State, tagged Big Government, Euro, Europe, European Commission, Fiscal Sovereignty, Redistribution, Sovereignty, Welfare, Welfare State on June 24, 2010| 6 Comments »
It's been amusing, in an I-told-you-so fashion, to follow the fiscal crises in Greece, Spain, and other European welfare states.And I feel like a voyeuristic ghoul as I observe the incredibly misguided bailout policies being adopted by the political elites (who are trying to bail out the business elites who made silly loans to corrupt nations in Southern Europe). But I'm not sure how to describe my emotions (dumbfounded fascination?) about the latest bad idea emanating from Europe – to have a fiscal federation that would give bureaucrats in Brussels power over national budgets. It's quite possible that this would result in some externally-imposed discipline for a basket case such as Greece, so it would not always lead to terrible results. But most of the decisions would be bad, particularly since the Euro-crats would use new powers to curtail tax competition in order to enhance the ability of governments to impose bad tax policy in order to seize more money. Moreover, fiscal centralization would exacerbate the main problem in Europe by creating a new avenue – cross-border subsidies – for people who want to mooch by getting access to other people's money. The Wall Street Journal Europe has a good editorial on the issue:
Of all the possible responses to Europe's sovereign debt woes, the notion of centralizing fiscal authority in Brussels may well be the most destructive. But that was exactly what European Central Bank President Jean-Claude Trichet proposed in testimony before the European Parliament Monday. Mr. Trichet's idea is that an independent body within the European Commission should have broad power to sanction national governments for fiscal or macroeconomic policies that threatened the stability of the euro. This would amount, in Mr. Trichet's words, to the "equivalent of a fiscal federation" for the euro zone. Mr. Trichet has spent nearly 40 years as a civil servant in one form or another, which may explain his belief that Europe's budgetary problems can be solved by technocrats. …Fiscal centralization would also undermine competition between different fiscal and macroeconomic policies within the euro zone. That would delight some countries, and probably some at the European Commission as well. During this crisis, French Finance Minister Christine Lagarde has criticized Germany for becoming too competitive for the euro zone's own good. And a decade ago, France was among the euro-zone countries that attacked Ireland for lowering its corporate income-tax rate to 12.5% to attract investment. …Ireland's 12.5% corporate tax rate was an experiment that contributed to a lowering of rates around the world in the succeeding years.
Great Moments in Government Stupidity
Posted in Flat Tax, Government intervention, Government stupidity, Housing, Income tax, Tax Reform, tagged Flat Tax, Government intervention, Government stupidity, Housing, Income tax, Tax Reform on June 24, 2010| 2 Comments »
There really isn't much I can add to this story in USA Today about the IRS giving money to prisoners. Yes, it is a story about typical government incompetence. But it also shows the inevitable problems that occur when government engages in industrial policy and social engineering via the tax code. Let's call this argument 1,549,628 in favor of the flat tax.
Despite efforts by the IRS to combat scams, thousands of individuals — including nearly 1,300 prison inmates — have defrauded the government of millions of dollars in home buyer credits, Treasury's inspector general reported Wednesday. …1,295 prisoners, including 241 serving life sentences, received $9.1 million in credits, even though they were incarcerated at the time they reported that they purchased their home. These prisoners didn't file joint returns, so their claims could not have been the result of purchases made with or by their spouses, the report said. 2,555 taxpayers received $17.6 million in credits for homes purchased before the dates allowed by law. 10,282 taxpayers received credits for homes that were also used by other taxpayers to claim the credit. In one case, 67 taxpayers used the same home to claim the credit.


For ultra fine finishing having hard-to-abrasion feature.
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Good sharpness with having oil within. Also good for setting the teeth of a saw.
This stone, originally conveyed from the United States, contains rich oil and has sharp breaking ability. It is good for setting cutlery and finishing for various kinds of tools.
This stone is suitable for operations where more accurate surfaces are needed than A Oil Stone. Because of the ultra minute tissue of this stone, little transformations of works happen.
A natural stone with high density and high hardness. Good for finest finishing.
This natural stone is produced only in the United States and has highly dense and ultra hard tissue. It is suitable for ultra fine finishing of watch, gauge and precision machinery.
SUPER STONE has a new.
Ceramic Stone with high strength and elasticity. Good for reciprocating and Ultra Sonics.
Fine and ultra fine finishing.
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strength and elasticity are significantly higher than convenient stones. Higher grade polished surface are gained with better effectiveness.


text:
package com.tomahim.jsonUtils.api;

import static org.junit.Assert.*;

import java.util.ArrayList;
import java.util.Date;
import java.util.List;

import javax.json.JsonArray;
import javax.json.JsonObject;
import javax.json.JsonValue.ValueType;

import org.junit.Before;
import org.junit.Test;

import com.tomahim.jsonUtils.api.JsonUtils;
import com.tomahim.jsonUtils.configuration.JsonUtilsSettings;
import com.tomahim.jsonUtils.entities.Person;
import com.tomahim.jsonUtils.entities.PersonGenerator;

public class JsonUtilDepthTest {

	public PersonGenerator personGenerator;

	public Person depth0;

	public Person depth1;

	public Person depth2;

	public Person depth3;

	public List<Person> personsDepth3;

	@Before
	public void initData() {
		JsonUtilsSettings.resetSettings();

		personGenerator = new PersonGenerator();

		depth1 = personGenerator.createPerson(1, 2);

		depth2 = personGenerator.createPerson(1, 2);

		Person uncleDeep1 = personGenerator.createPerson();
		Person uncleDeep2 = personGenerator.createPerson();
		uncleDeep1.addUncle(uncleDeep2);
		depth2.addUncle(uncleDeep1);

		depth3 = (Person) depth2.clone();
		Person friendDeep1 = personGenerator.createPerson();
		Person friendDeep2 = personGenerator.createPerson();
		Person friendDeep3 = personGenerator.createPerson();
		friendDeep2.addFriend(friendDeep3);
		friendDeep1.addFriend(friendDeep2);
		depth3.addFriend(friendDeep1);

		personsDepth3 = new ArrayList<Person>();
		personsDepth3.add(depth3);
		personsDepth3.add(depth3);
		personsDepth3.add(depth3);
	}

	@Test
	public void testJsonContructionDepth0() {
		JsonObject jsonObject = JsonUtils.toJson(depth1, 0);

		//It should contain deep level 0 data
		assertTrue(CommonTestMethods.jsonObjectContainKeys(jsonObject, "id", "name", "isMale", "birthDate"));

		//It shouldn't contain deep level 1 data
		assertFalse(CommonTestMethods.jsonObjectContainKeys(jsonObject, "friends", "uncles"));
	}

	@Test
	public void testJsonContructionDepth1() {

		JsonObject jsonObject = JsonUtils.toJson(depth1, 1);

		//It should get deep level 1 data
		assertTrue(jsonObject.containsKey("friends"));
		assertTrue(jsonObject.get("friends").getValueType().equals(ValueType.ARRAY));
		assertTrue(jsonObject.get("uncles").getValueType().equals(ValueType.ARRAY));

		assertTrue(jsonObject.getJsonArray("friends").size() == 1);
		assertTrue(jsonObject.getJsonArray("uncles").size() == 2);

		//It shouldn't get deep level 2 data
		JsonObject jsonObject2 = JsonUtils.toJson(depth2, 1);
		JsonArray uncles = jsonObject2.getJsonArray("uncles");

		assertTrue(uncles.size() == 3);

		JsonObject thirdUncle = uncles.getJsonObject(2);

		assertNotNull(thirdUncle);
		assertTrue(thirdUncle.getValueType().equals(ValueType.OBJECT));
		assertNull(thirdUncle.getJsonArray("uncles"));
 	}

	private void testDepth2(JsonObject jsonObject) {
		//It should get deep level 1 data
		assertTrue(jsonObject.containsKey("friends"));

		JsonArray friendsDeep1 = jsonObject.getJsonArray("friends");

		assertTrue(friendsDeep1.size() == 2);

		JsonObject friendDeep1 = friendsDeep1.getJsonObject(1);

		//It should get deep level 2 data
		assertTrue(friendDeep1.containsKey("friends"));

		JsonArray friendsDeep2 = friendDeep1.getJsonArray("friends");

		assertTrue(friendsDeep2.size() == 1);

		JsonObject friendDeep2 = friendsDeep2.getJsonObject(0);

		//It shouldn't get deep level 2 data
		assertFalse(friendDeep2.containsKey("friends"));
	}

	@Test
	public void testJsonContructionDepth2() {
		JsonObject jsonObject = JsonUtils.toJson(depth3, 2);
		testDepth2(jsonObject);
	}

	@Test
	public void testArrayConstructionDepth2() {
		JsonArray jsonArray = JsonUtils.toJsonArray(personsDepth3, 2);
		assertTrue(jsonArray.size() == 3);
		for(int i = 0; i < jsonArray.size(); i++) {
			testDepth2(jsonArray.getJsonObject(i));
		}
	}

}

redpajama_set_name: RedPajamaGithub


Monday 28 Aug 2017 • On Saturday 26th August a wonderful day was enjoyed by all at Shiresmill as we welcomed Sam Orde, Chairman of RDA national, on this leg of 'The Big Ride', a series of events nationwide to raise funds for a major new RDA centre.
A Great Day at Culross Fete!
Sunday 20 Aug 2017 • Thanks to everyone who came to visit our stall at Culross Fete today. The Shiresmill team loved meeting everyone and we hope you all enjoyed our cake and candy that seemed to go down a treat!
Culross Village Fete and Farmers Market 2017- This Weekend!
Special Thanks to our School Holiday Superstars!
Saturday 5 Aug 2017 • At Shiresmill we are so very grateful for the time, hard work and enthusiasm we receive from all our amazing volunteers, and this month we'd like to say a very special 'Thank You' to our young volunteers who have chosen to work at the Centre during the school holidays.
Saturday 5 Aug 2017 • Wednesday this week was saddle fitting day at Shiresmill.
Exxon Mobil Team Comes to Shiresmill!
Friday 4 Aug 2017 • Earlier this week Danielle Miller and several of her colleagues from Exxon Mobil Cowdenbeath came out to Shiresmill to help out for the day.
Very Special Guests 'The Patryns' to Play at Fun Day 2017!
Tuesday 1 Aug 2017 • We are thrilled to announce that local band 'The Patryns' will be playing at Shiresmill Fun Day on 3rd September 2017!
Tuesday 1 Aug 2017 • Fun Day 2017 is shaping up to be the best yet! We are delighted to announce that our event will be opened by the one and only Jim Leishman!
Tuesday 1 Aug 2017 • On the afternoon of Saturday 26th August, Shiresmill Therapy Riding Centre are excited to be hosting Sam Orde, Chairman of RDA UK, on this leg of 'Sam's Big Ride'!
Shiresmill is now on Instagram!
Monday 24 Jul 2017 • We are ShiresmillTRC. Please follow us for images from our Centre, of our beautiful Sensory Park and of course our gorgeous ponies!


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UK's Theresa May Says Next Vote Is on Brexit Delay
Both Britain and the EU have ramped up planning for a no-deal Brexit, which would rip up decades of rules for travel and trade between Britain and the bloc
Published at 8:09 pm on March 13, 2019
British Prime Minister Theresa May says Parliament will vote Thursday on whether to seek a delay to Britain's March 29 departure from the European Union.
May said lawmakers are at the point where they must approve a withdrawal agreement in coming days and request a short postponement to Brexit day or request a "much longer" extension from the EU to negotiate a new arrangement.
The prime minister warned that a long extension would mean Britain would have to take part in European Parliament elections in late May.
She says this is not her preferred outcome and urged Parliament to "face up" to the consequences of the decisions it has made.
Britain's political crisis sparked anxiety across the European Union on Wednesday as fears rose that Britain would crash out of the bloc on March 29 without a withdrawal agreement to smooth the way.
Residents, businesses and politicians across Britain and the bloc were bracing for a chaotic Brexit after British lawmakers rejected Prime Minister Theresa May's Brexit agreement for a second time by a decisive 391-242 vote on Tuesday.
Parliament was due to vote later Wednesday on whether to rule out leaving the EU on March 29 without a deal — though that won't eliminate the risk it could happen anyway.
As Britain teeters ever closer to the edge of the Brexit cliff, lawmakers are trying to seize control from the divided and squabbling government, although it's far from clear if they can agree on a way forward. There are competing factions that support May's deal, a "softer" deal that would keep close ties with the EU, a no-deal Brexit, or even a new referendum on Britain's EU membership.
A weakened May, her authority shredded by successive Brexit defeats in Parliament, said her Conservative lawmakers could vote Wednesday night according to their conscience, rather than having to follow a party line.
Even her voice was almost gone. Environment Secretary Michael Gove opened the House of Commons debate as a stand-in for the prime minister, who was hoarse as she answered questions earlier in the day.
Opposition Labour Party Brexit spokesman Keir Starmer said "a no-deal Brexit could be terminal for Britain's manufacturing."
He said May's "mantra of 'my deal or no deal' needs to be dead and buried tonight."
Across the Channel, top EU officials warned that the prospect of no deal could not be eliminated unless the U.K. Parliament approved some type of exit deal. By law, Britain will leave the EU on March 29, with or without a deal, unless it cancels Brexit or secures a delay from the EU.
"The risk of a no-deal has never been higher," chief EU negotiator Michel Barnier said.
"I urge you please not to underestimate the risk or its consequences," he told European lawmakers in Strasbourg, France.
Both Britain and the EU have ramped up planning for a no-deal Brexit, which would rip up decades of rules for travel and trade between Britain and the bloc. Economists say it could cause huge upheaval, with customs checks causing gridlock at U.K. ports, new tariffs triggering sudden price increases and red tape for everyone from truckers to tourists.
The U.K. government announced its plans for the Irish border in the event of a no-deal Brexit, saying it wouldn't impose new checks, duties or controls on goods coming from EU member Ireland into Northern Ireland. It also said it wouldn't slap tariffs on 87 percent of goods coming into Britain from the EU — though there would be new levies on imports of some items including meat and cars.
The tariffs, intended to be temporary, wouldn't apply to goods crossing from Ireland to Northern Ireland, raising fears the plan would spark a rise in smuggling.
In Irish border communities and U.K. ports, no-deal anxiety was mounting.
"Potentially it is going to be a nightmare," said Michael Eddy, a district councilor who lives in the aptly named town of Deal, a few miles from the major Channel port of Dover on England's south coast.
He says local authorities have modeled potential disruptions and believe that even "a two-minute delay for every truck going through the port of Dover" would lead to a 50-mile (80-kilometer) traffic jam.
"What then happens with local people wanting to go about their business, wanting to get to hospitals, wanting to get their kids to school, all of that kind of stuff?" he said.
U.K. Brexit Secretary Stephen Barclay told the BBC the government was prepared but acknowledged "no-deal is going to be very disruptive for the economy."
Carolyn Fairbairn, director-general of the Confederation of British Industry, said the no-deal arrangements would be "a sledgehammer for our economy."
If a no-deal Brexit is ruled out, Parliament will vote Thursday on whether to ask the EU to delay Britain's departure. The EU — openly exasperated by Britain's continuing Brexit crisis — warned that the U.K. would need to present a strong reason for any extension.
"I am against every extension — whether an extension of one day, one week, even 24 hours — if it's not based on a clear opinion of the House of Commons for something," said the European Parliament's chief Brexit official, Guy Verhofstadt. "Please make up your minds in London, because this uncertainty cannot continue."
The European Parliament, meanwhile, approved measures to ameliorate the immediate hardships of a no-deal Brexit. It backed emergency plans to provide continuity for everything from air, port and road traffic to foreign students to the fishing industry.
The U.K. Parliament has twice rejected the withdrawal agreement that May spent two years negotiating with the EU, and the bloc insists there will be no more talks.
German Foreign Minister Heiko Maas issued a warning to British lawmakers.
"Whoever rejects the (Brexit) agreement plays with the welfare of their citizens and the economy in a reckless way," he said.
Yet May has not given up on a third attempt to get her deal through Parliament again.
"I am confident that we will do a deal," said U.K. Treasury chief Philip Hammond.
Many Britons wish they could share his optimism.
"I think that a bit of unity would be helpful now," said Katharine Beaugie, an artist in Dover. "It would be much better if we could have found some sort of decision."
Renee Graham, Danica Kirka, Frank Jordans and Angela Charlton contributed.


text:
Giulio Troncarelli
After graduating from the Polytechnic University of Turin in 1992 with a degree in Electronic Engineering, between 1994 and 1998 Giulio was a member of the Governing Board of AEM Torino (now Iren) where he was responsible for tasks in the field of organisation and strategic planning.
In 1999 he joined the Altran Group where he developed the Energy and Utilities Practice. He then became Director for Italy and a member of the International Board. As part of the integration of Arthur D. Little into the Altran group, he helped develop a new change management and market positioning strategy.
In 2013 he joined Arthur D. Little in the Practice Technology and Innovation Management sector where he was involved with M&A operations and supported the start-up of technology companies.
From 2006 to 2013 he was a member of the Executive Committee of AIGET (the Italian Association of Energy Wholesalers and Traders) during which time he assumed the role of Coordinator of the Gas Area and represented the Association during the creation of the Gas Exchange.
Since 2015 he has been pursuing an entrepreneurial path in the field of energy markets. He has launched two start-ups and taken on the role of Advisor at leading Energy, Energy Efficiency and Innovation companies.
After graduating from the Polytechnic University of Turin in 1996 with a degree in Computer Engineering, between 1995 and 1996 Massimo worked at a leading Robotics company where he developed a robot for three-dimensional laser cutting.
In 1996, he continued to build on his previous experience by working at a software development company where he consolidated his knowledge of complex network architectures and the object oriented approach to application development.
Since 1999 he has been working on another initiative with Mec Informatica, a leading company operating in the supply of applications for the management of real estate assets and public works. As Technical and Architectural Manager, he oversees the technical choices made by the company and is the contact person for the company's main Clients, including national banks and insurance companies.
In 2003, he joined the Altran Group where he was tasked with developing an IT platform to manage the, then new, process of liberalising the energy markets. Thanks to this experience he soon became the company's point of reference for issues related to shipping gas. He also took on the role of external consultant for the activities of AIGET (the Italian Energy Wholesalers and Traders Association).
In 2008, again within the Altran group, he assumed the role of Manager and then Senior Manager. During this time, he was responsible for developing the ICT market/Organisation of Utilities by managing national relations with leading Italian energy companies and coordinating employees based throughout the country.
In 2013 he decided to leave the Altran group to join Arthur D. Little where he was involved with Practice Technology and Innovation Management to support the start-up processes of technology companies in the energy market.
Since 2015, he has pursued an entrepreneurial path in the energy markets sector. He has launched two start-ups, taken on CIO and CEO positions and contributed to the creation of a Cloud services platform for the energy market.


I don't remember the last time I left the house without something on my lips. A bold lip is honestly my signature at this point, and being as Clarins is a favorite brand of mine, I was excited to try their new Instant Light Lip Comfort Oils. The lip oil can be worn alone as a moisturizer or it can be applied before or after lipstick as either a primer or a gloss. I like to keep my lips moisturized, but semi-matte, so the lip oils have been serving as a great primer for me. I just swipe some on as I prep my face for makeup and then my lips are fully moisturized by the time I apply lipstick.
The oils come in seven different color options, some shimmery and one even comes in mint flavored. My favorites are the Candy and Tangerine shades which react to your lips' PH to give you a customized shade of pink. I love the subtle plumping benefits and the massive paddle shaped applicator, which actually feels like velvet. The formula is thick, but the oil melts on your lips and leaves them feeling hydrated and soft.
Shop Clarins Instant Light Lip Comfort Oils.
*Thank you Clarins for sponsoring this post!


A fun and helpful tool to help children in writing their first letters!
Learn and have fun with this cool magnetic alphabet and number doodle pad for kids!
The Magnetic Drawing Tablet is a wonderful learning tool that provides an immersive, early writing lesson.
Following the directional arrows, use the magnetized pen to trace over the letters or numbers and the beads will pop to the surface with an audible click revealing the shape.
Press them back down with your finger or the pen and start over.
Made from the highest quality materials, the magnet never comes out of the pens and the balls are completely self-contained and stay securely in the board.
The engaging Magnetic Alphabet and Number Doodle Pad is ideal for kids to use on their own as they learn their ABCs and 123s and master the art of penmanship.
Magnetic Drawing Tablet is ideal to help a child making their first steps in writing letters or numbers!
Kids writing their first numbers will get helpful up, down and sideways instructions via easy-to-follow arrows. A magnetic stylus pulls beads up to create solid lines. No paper or pen is involved. It is a simple, effective practice at writing for ages 3 and above.
Explore creativity and learning with sensory-reinforced play. Learn letters and numbers, uppercase and lower, print and cursive; trace the numbered arrows as the stylus pulls the beads up to form a solid line.


In March, 2003* the Wall Street Journal Magazine of Personal Business, Smart Money, featured a special report on how one's home values are boosted by good landscape.
At the time, the then president-elect of the National Association of Realtors, Walt McDonald, had advised; "when people ask me how they can get strong interest in their property, I always tell them to fix up their landscaping". Studies showed that a design-wise, landscape investment of about 5% of a home's value would result in as much as a 150% return. In most any market or region, a home on the market at $500,000 with an extra $25,000 invested in new landscape could result in an easy 7.5% / $12,500 of additional profit.
The Smart Money article suggested four distinct ways to invest in, and enhance, your home and property values – both for your own living as well as for future sale.
First – concentrate on Curb-Appeal – everything that can be seen from the street or during the approach to your home. Curb-Appeal is enhanced through landscape beds, staggered and layered height plantings (ground covers to taller shrubs), shade and special interest trees, walkways, pedestrian and vehicular arrivals and an attention to spacing, massing, scale, framing and accenting.
We live in a very mobile society. International travel for education and leisure is now commonplace. Travel, whether spur-of-the-moment short duration trips or well-planned group or individual extended excursions are becoming the norm for families and friends. People seem to gravitate, through curiosity and inquisitiveness, to the pursuit of new experiences. For many, the acquisition of these experiences is far more satisfying than being the beneficiary of gifts and material goods.
I believe that folks have many "a-ha" moments during their travels. I think that more and more people are developing an understanding and appreciation of the role that art, architecture, urban design and public space play in illuminating cultural connections and inspiring our lives.
The foremost architect / architectural theorist / urban planner, Leon Krier, is a champion of the European city and village as a model for community building. He has been quoted as stating, "The architecture of the city and public space is a matter of common concern to the same degree as laws and language. They are the foundation of civility and civilization".
Usually, in a suburban context, the public realm is not surrounded and framed by interesting, modern or historic architecture. The suburban public realm can, however, be as diverse – albeit, more spacious and interwoven throughout the built elements of the community. It is visually and experientially evident and it is critical to defining a sense-of-place that distinguishes a community.
When you shop for that perfect place for your residence – be cognizant and alert to the natural character and spirit of the place as much as you are focused on the features and appointments of the home itself.
Of course, individual recreational parks, pocket-parks and trailheads, community social buildings and amenities are the anchors for the suburban public realm, in most master-planned communities. But in a more grand manner, the public realm of the community is displayed in its open space – its vistas and view corridors – its setting and backdrop – its natural complexion and its conservation of sensitive lands. Neighborhood sidewalks, paths, trails, bike lanes, fields and fairways, lakes and waterways and even the manner in which the streets and roads were threaded – all come together to showcase the public realm.
Each community and its collection of neighborhoods is different. Those whose public realm was consciously considered and designed into the fabric of the place are those that beckon and attract the most interest. They are the places that offer true respite – beyond the walls of the house.
Comfort and commons, comradery and community are the key attributes of great neighborhoods. When the public realm of a community is celebrated and cared for – values for everyone are enhanced.
Find the place that serves you the best – one that feels right – not just one that fits your budget. And, when you do find that special place, be a part of its public realm care and stewardship. When you do – you will protect yours and your neighbors values and you will enjoy a more balanced, healthy and happy lifestyle.


Comprehensive terminal emulation for Windows® operating systems.
TTWin 4 is the latest evolution of Turbosoft's premier Terminal Emulation software. The culmination of 30 years of experience in providing high quality terminal emulation solutions, Version 4 of TTWin maintains the highest level of accuracy, quality and reliability across a wide range of protocols and terminals.
TTWin 4 introduces new features designed to improve automation and terminal enhancement as well an updated interface and technical additions that will ensure your terminal emulation software remains relevant and compatible with modern desktop and network environments.
As always TTWin continues to offer high quality, reliable and accurate emulations for more than 80 different terminal emulations and numerous communications protocols giving users access to all hosts from the one product.
Keyboard, hotspot, mouse events may be customized to execute menu commands, macros, scripts, emulation keystrokes and more.
The table below illustrates the range of terminals emulated by TTWin 4. The Red, Green and Blue columns denote the three different 'packs' that TTWin is distributed in. The only difference between these packs are the terminal emulations supplied in each.
To download a free, fully functional demo of TTWin4, please visit the trial software page.
The choice of native 64 bit and 32 bit versions, TTWin is available for your current and future Windows operating system.
TTWin supports both IPv4 and IPv6. When you need to make the transition, TTWin has the capability.
The emulations you need are available in the one pack, at the one price. TTWin provides the power to create an individual environment to meet the specific needs without compromise, future proofing your organization.
TTWin's keyboard mapping is extremely flexible. Users can map text strings, macros, host sequences or emulation keys to any key combination on a PC keyboard. Keyboard mapping may be performed either through the intuitive graphical keyboard mapper, or through the non-graphical method.
Turbosoft regards data security to be an essential part of a terminal session and as such, we supply industry standard encryption as standard.
TTWin has extensive support for pass through printing. This function is totally configurable and implements print through in a way that is highly effective in every environment. Screen printing is also supported, allowing regions of the screen to be printed. 3287 and 3812 support is offered for printing with IBM 3270 and 5250 emulations.
ActiveX API, HLLAPI support, Hotspots, a built in scripting language and macros help automate complex tasks and customize host interaction. A smart Macro Assistant, new in TTWin 4, makes creating complex macros quick and easy.
TTWin allows you to create your own Hotspots providing a Windows style of point-and-click style functionality. Hotspots can be employed to simplify complex tasks, enhances productivity and improve the user experience.
TTWin has powerful character selection facilities to cater for the complex character set requirements found in many languages. TTWin comes with full code page support. Emulations may use as many code pages as required. What's more, each emulation can do this independently from other sessions. TTWin version 4 offers support for double byte character fonts, such as Chinese, Korean, and Japanese language fonts.
TTWin's powerful scripting language offers a wide range of possibilities for automating tasks, improving the user experience and enhancing legacy applications. It's based on Visual Basic for Applications (VBA) and includes an Integrated Development Environment for rapid learning, developement and debugging.
Use TTWin's OCX Interface to take advantage of Turbosoft's proven and powerful terminal emulation capabilities and integrate the functionality of TTWin into your application.


text:
Justia Patents For Circumference Of CrownUS Patent for Head-mounted display Patent (Patent # 10,634,923)
Head-mounted display
Aug 30, 2019 - STARVR CORPORATION
A head-mounted display includes a body, a bearing base, a knob, a guiding element, and a head belt set. The knob is pivoted to the bearing base and located outside the bearing base. The guiding element is pivoted to the bearing base and located inside the bearing base and is configured to be driven by the knob to rotate. The guiding element includes a first gear and a second gear. The head belt set connects the body and the bearing base. The head belt set includes a first side head belt, a second side head belt, and an auxiliary head belt. The first gear is configured to drive the first side head belt and the second side head belt to move. The second gear is configured to drive the auxiliary head belt to move.
Latest STARVR CORPORATION Patents:
VIRTUAL REALITY POSITIONING DEVICE, VIRTUAL REALITY POSITIONING SYSTEM, AND MANUFACTURING METHOD OF VIRTUAL REALITY POSITIONING DEVICE
HEAD MOUNT DISPLAY
Head-mounted display having quick assembly and detachment design
EYE TRACKING DEVICE AND HEAD MOUNTED DISPLAY
Head-mounted display apparatus and acoustic device
CROSS-REFERENCE TO RELATED APPLICATION
This application claims the priority benefit of Taiwan application serial no. 107130732, filed on Aug. 31, 2018. The entirety of the above-mentioned patent application is hereby incorporated by reference herein and made a part of this specification.
BACKGROUND Technical Field
The disclosure relates to a display device, and in particular to a head-mounted display.
Description of Related Art
The so-called virtual reality refers to the use of computer simulation to generate a three-dimensional (3D) virtual environment that provides users with sensory simulations such as sight, smell or touch. As a result, the users can acquire a sensation of immersion as if they are present on the scene.
Generally speaking, the user needs to wear a head-mounted display to obtain the image of the 3D virtual environment. The head-mounted display may be roughly divided into two main parts, that is, a body and a head belt set, and the head belt set may be roughly divided into two side head belts passing over the left side and the right side of the user's head and an auxiliary head belt passing over the top of the user's head. By adjusting the lengths of the two side head belts or the auxiliary head belt, the user is able to control the degree of tightness when wearing the head-mounted display. Although the lengths of the two side head belts may be adjusted synchronously through the same adjustment mechanism, the length of the auxiliary head belt needs to be adjusted through another adjustment mechanism. Therefore, in the case where the lengths of the two side head belts and the length of the auxiliary head belt cannot be synchronously adjusted, the user needs to spend more time adjusting the degree of tightness when wearing the head-mounted display.
The disclosure provides a head-mounted display that is convenient to use.
A head-mounted display of the disclosure includes a body, a bearing base, a knob, a guiding element, and a head belt set. The bearing base is disposed opposite to the body. The knob is pivoted to the bearing base and located outside the bearing base. The guiding element is pivoted to the bearing base and located inside the bearing base and is configured to be driven by the knob to rotate. The guiding element includes a first gear and a second gear configured to stack on the first gear. The head belt set connects the body and the bearing base, and the head belt set includes a first side head belt, a second side head belt, and an auxiliary head belt. The first side head belt has a first gear rack portion extending into the bearing base, and the second side head belt has a second gear rack portion extending into the bearing base; wherein the second gear rack portion is configured to stack on the first gear rack portion, and the first gear is engaged with a first internal gear rack of the firth gear rack portion and a second internal gear rack of the second gear rack portion. The auxiliary head belt has an auxiliary gear rack portion extending into the bearing base, wherein the auxiliary gear rack portion is configured to stack on the second gear rack portion, and the second gear is engaged with an auxiliary internal gear rack of the auxiliary gear rack portion.
Based on the above, the head-mounted display of the disclosure may synchronously control the movements of the first side head belt, the second side head belt and the auxiliary head belt, so that the degree of tightness may be quickly adjusted when the user wears the head-mounted display. In other words, the head-mounted display of the disclosure is convenient to use.
To make the aforementioned and other features and advantages of the disclosure more comprehensible, several embodiments accompanied with drawings are described in detail as follows.
The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification. The drawings illustrate exemplary embodiments of the disclosure and, together with the description, serve to explain the principles of the disclosure.
FIG. 1 is a schematic view of a head-mounted display according to an embodiment of the disclosure.
FIG. 2 is a schematic partial enlarged view showing a location of a knob in the head-mounted display according to an embodiment of the disclosure.
FIG. 3 is a schematic partial enlarged view showing a bearing base, a first side head belt and a second side head belt in the head-mounted display according to an embodiment of the disclosure.
FIG. 4 is a schematic partial enlarged view showing the bearing base, the first side head belt, the second side head belt and an auxiliary head belt in the head-mounted display according to an embodiment of the disclosure.
DESCRIPTION OF THE EMBODIMENTS
FIG. 1 is a schematic view of a head-mounted display according to an embodiment of the disclosure. FIG. 2 is a schematic partial enlarged view showing a location of a knob in the head-mounted display according to an embodiment of the disclosure. FIG. 3 is a schematic partial enlarged view showing a bearing base, a first side head belt, and a second side head belt in the head-mounted display according to an embodiment of the disclosure. FIG. 4 is a schematic partial enlarged view showing the bearing base, the first side head belt, the second side head belt, and an auxiliary head belt in the head-mounted display according to an embodiment of the disclosure. Particularly, a knob 130 of FIG. 2 is shown in dashed lines, so as to clearly present the internal structural configuration. FIG. 3 and FIG. 4 omit illustration of a part of the casing of a bearing base 120, so as to clearly present the internal structural configuration.
Referring to FIG. 1 and FIG. 2, in the present embodiment, a head-mounted display 100 includes a body 110, a bearing base 120, a knob 130, a guiding element 140, and a head belt set 150. The body 110 is configured to send and receive signals or information, process signals or information, receive power and display images, and the body 110 is disposed opposite to the bearing base 120. Further, when a user wears the head-mounted display 100, the body 110 is closely placed in front of the user's eyes, and the bearing base 120 is abuts against the back of the user's head. On the other hand, the knob 130 is pivoted to the bearing base 120 and located outside the bearing base 120. In other words, the knob 130 and the body 110 are located at two opposite sides of the bearing base 120, respectively. The guiding element 140 is pivoted to the bearing base 120 and located inside the bearing base 120 and is covered by the knob 130. Further, the knob 130 and the guiding element 140 may be separated from each other or may be abutted against each other due to the rotation of the knob 130. When the knob 130 is rotated to push against the guiding element 140, the guiding element 140 can be rotated synchronously with the knob 130.
The bearing base 120 includes an internal ratchet portion 121. Specifically, the knob 130 is pivoted onto the internal ratchet portion 121 and includes driving portions 131 (which are schematically shown as plural). The driving portions 131 are, for example, bumps that protrude from one side of the knob 130 facing the bearing base 120, and are located inside the internal ratchet portion 121. The guiding element 140 includes a shaft portion 141, a positioning portion 142, and a stopping portion 143. The shaft portion 141 is pivoted to the internal ratchet portion 121 and located inside the internal ratchet portion 121. The positioning portion 142 and the stopping portion 143 are connected to the outer peripheral surface of the shaft portion 141. Specifically, the positioning portion 142 and the stopping portion 143 are located inside the internal ratchet portion 121, and the positioning portion 142 is configured to engage with a plurality of internal ratchet teeth 122 of the internal ratchet portion 121. On the other hand, the number of the positioning portions 142 and the number of the stopping portions 143 may be plural and may be, for example, the same as the number of the driving portions 131. Each positioning portion 142 has an engaging portion 142a and a driven portion 142b opposite to each other. The driven portions 142b and the stopping portions 143 are connected to the outer peripheral surface of the shaft portion 141. Also, each stopping portion 143 is located at one side of the corresponding driven portion 142b, or one stopping portion 143 is disposed between any two adjacent driven portions 142b.
As described above, each engaging portion 142a is connected to the corresponding driven portion 142b and extends to one side of the corresponding stopping portion 143, and engages at least a part of the internal ratchet teeth 122 by one side of the engaging portion 142a facing away from the shaft portion 141. On the other hand, each driving portion 131 is located between the corresponding engaging portion 142a and driven portion 142b. In other words, there is a receding space between each engaging portion 142a and the corresponding driven portion 142b to accommodate the corresponding driving portion 131. For instance, the knob 130 is configured to rotate clockwise or counterclockwise with respect to the bearing base 120. When the knob 130 is rotated clockwise with respect to the bearing base 120, each driving portion 131 rotates with respect to the internal ratchet portion 121 to push the corresponding driven portion 142b to move, so as to drive the guiding element 140 to rotate synchronously along the same direction. When the knob 130 stops rotating, structural interference occurs between the engaging portions 142a and the internal ratchet teeth 122. The structural interference between the engaging portions 142a and the internal ratchet teeth 122 has to be removed before the knob 130 and the guiding element 140 can be rotated clockwise or counterclockwise again with respect to the bearing base 120 depending on the requirements.
When the knob 130 is rotated counterclockwise with respect to the bearing base 120, each driving portion 131 pushes the corresponding engaging portion 142a to move, so as to make the corresponding engaging portion 142a elastically deformed toward the shaft portion 141, which thereby removes the structural interference with the at least a part of the internal ratchet teeth 122. On the other hand, a gap G is maintained between each engaging portion 142a and the shaft portion 141. Each stopping portion 143 is located in the corresponding gap G, and each stopping portion 143 can be used to limit the degree of deformation of the corresponding engaging portion 142a to prevent the engaging portions 142a from being overly deformed. Further, the knob 130 continues to be rotated counterclockwise with respect to the bearing base 120. Each driving portion 131 pushes the corresponding engaging portion 142a to move to drive the guiding element 140 to rotate synchronously along the same direction. When the knob 130 stops rotating, structural interference occurs between the engaging portions 142a and the internal ratchet teeth 122. The structural interference between the engaging portions 142a and the internal ratchet teeth 122 has to be removed before the knob 130 and the guiding element 140 can be rotated clockwise or counterclockwise again with respect to the bearing base 120.
Referring to FIG. 1 to FIG. 4, in the present embodiment, the guiding element 140 further includes a first gear 144 and a second gear 145 configured to stack on the first gear 144. Specifically, the shaft portion 141 passes through the bearing base 120 to connect the first gear 144, and the shaft portion 141, the first gear 144, and the second gear 145 can rotate synchronously. The head belt set 150 connects the body 110 and the bearing base 120, and includes a first side head belt 151, a second side head belt 152, and an auxiliary head belt 153. When the user puts on the head-mounted display 100, the first side head belt 151 and the second side head belt 152 respectively extend by the left and right sides of the user's head, and the auxiliary head belt 153 extends over the top of the user's head. Through adjusting the lengths of the first side head belt 151, the second side head belt 152, and the auxiliary head belt 153, the degree of tightness of the head-mounted display 100 when put on the user can be controlled.
The first side head belt 151 has a first gear rack portion 151a extending into the bearing base 120, and the second side head belt 152 has a second gear rack portion 152a extending into the bearing base 120. Specifically, the second gear rack portion 152a is configured to stack on the first gear rack portion 151a, and the first gear 144 is engaged with a first internal gear rack 151b of the first gear rack portion 151a and a second internal gear rack 152b of the second gear rack portion 152a. On the other hand, the auxiliary head belt 153 has an auxiliary gear rack portion 153a extending into the bearing base 120. Specifically, the auxiliary gear rack portion 153a is configured to stack on the second gear rack portion 152a, and the second gear 145 is engaged with an auxiliary internal gear rack 153b of the auxiliary gear rack portion 153a. Further, the second internal gear rack 152b is located between the first gear rack portion 151a and the auxiliary gear rack portion 153a. The auxiliary gear rack portion 153a is perpendicular to the first gear rack portion 151a and the second gear rack portion 152a, and the first gear rack portion 151a, the second gear rack portion 152a, and the auxiliary gear rack portion 153a can move relatively to each other.
When the knob 130 is rotated clockwise with respect to the bearing base 120, the guiding element 140 is driven by the knob 130 to rotate synchronously. Meanwhile, the first gear 144 and the second gear 145 are rotated synchronously as well. Specifically, the first gear 144 drives the first gear rack portion 151a and the second gear rack portion 152a to move along two opposite directions, respectively, and the second gear 145 drives the auxiliary gear rack portion 153a to move in a direction perpendicular to the first gear rack portion 151a and the second gear rack portion 152a. In other words, with the integrated design of the knob 130 and the double gears (i.e., the first gear 144 and the second gear 145), the user can drive the double gears (i.e., the first gear 144 and the second gear 145) to rotate through rotating the knob 130, and can drive the first side head belt 151, the second side head belt 152, and the auxiliary head belt 153 to move synchronously through the synchronously rotated double gears (i.e., the first gear 144 and the second gear 145), so as to quickly adjust the degree of tightness of the head-mounted display 100 when put on the user.
For example, the gear ratio of the first gear 144 to the second gear 145 may be 7:4. With such a design, during the process of driving the first side head belt 151, the second side head belt 152, and the auxiliary head belt 153 to synchronously move through the synchronously rotated double gears (i.e., the first gear 144 and the second gear 145), the moving amounts of the first side head belt 151 and the second side head belt 152 are larger than the moving amount of the auxiliary head belt 153, so as to fit the contour differences between different regions of the head, such as the contour differences between the left and right sides of the head and the top of the head. In other embodiments, the gear ratio of the first gear to the second gear may be additionally adjusted according to the requirements of design.
In the present embodiment, the bearing base 120 includes a plurality of limiting portions 123 that are located around the first gear 144 and the second gear 145 and are used to define a first limiting channel 124 and a second limiting channel 125 perpendicular to each other. Further, the first gear rack portion 151a and the second gear rack portion 152a are slidably disposed inside the first limiting channel 124, and the auxiliary gear rack portion 153a is slidably disposed inside the second limiting channel 125, so as to increase the stability of the first side head belt 151, the second side head belt 152, and the auxiliary head belt 153 when moving.
Based on the above, with the integrated design of the knob and the double gears in the disclosure, the user may drive the double gears to be rotated by rotating the knob, and the auxiliary head belt, the first side head belt and the second side head belt may be driven to move synchronously by the synchronously rotating double gears. As a result, the degree of tightness may be quickly adjusted when the user wears the head-mounted display. In other words, the head-mounted display of the disclosure is convenient to use.
Although the embodiments are already disclosed as above, these embodiments should not be construed as limitations on the scope of the disclosure. It will be apparent to those skilled in the art that various modifications and variations can be made to the disclosed embodiments without departing from the scope or spirit of this disclosure. In view of the foregoing, it is intended that the disclosure covers modifications and variations provided that they fall within the scope of the following claims and their equivalents.
1. A head-mounted display comprising:
a body;
a bearing base, disposed opposite to the body;
a knob, pivoted to the bearing base and located outside the bearing base;
a guiding element, pivoted to the bearing base and located inside the bearing base and configured to be driven by the knob to rotate, the guiding element comprising a first gear and a second gear stacked on the first gear; and
a head belt set, connecting the body and the bearing base, the head belt set comprising: a first side head belt, having a first gear rack portion extending into the bearing base; a second side head belt, having a second gear rack portion extending into the bearing base, wherein the second gear rack portion is configured to stack on the first gear rack portion, and the first gear is engaged with a first inner gear rack of the first gear rack portion and a second inner gear rack of the second gear rack portion; and an auxiliary head belt, having an auxiliary gear rack portion extending into the bearing base, wherein the auxiliary gear rack portion is configured to stack on the second gear rack portion, and the second gear is engaged with an auxiliary inner gear rack of the auxiliary gear rack portion.
2. The head-mounted display according to claim 1, wherein the bearing base comprises an internal ratchet portion, the knob is pivoted onto the internal ratchet portion, and the guiding element further comprises a positioning portion, wherein the positioning portion is located inside the internal ratchet portion and is configured to engage with a plurality of internal ratchet teeth of the internal ratchet portion.
3. The head-mounted display according to claim 2, wherein the knob comprises a driving portion located inside the internal ratchet portion, and the positioning portion has an engaging portion and a driven portion opposite to each other, wherein the driving portion is located between the engaging portion and the driven portion, and the driving portion is configured to rotate with respect to the internal ratchet portion to push the driven portion or the engaging portion to move.
4. The head-mounted display according to claim 3, wherein the guiding element further comprises a shaft portion and a stopping portion, and the shaft portion passes through the bearing base to connect the first gear, wherein the driven portion and the stopping portion are connected to an outer peripheral surface of the shaft portion, the stopping portion is located at one side of the driven portion, and the engaging portion is connected to the driven portion and extends to one side of the stopping portion.
5. The head-mounted display according to claim 4, wherein a gap is maintained between the engaging portion and the shaft portion, and the stopping portion is located in the gap.
6. The head-mounted display according to claim 1, wherein the bearing base comprises a plurality of limiting portions located around the first gear and the second gear and configured to define two limiting channels, wherein the first gear rack portion and the second gear rack portion are slidably disposed inside one of the two limiting channels, and the auxiliary gear rack portion is slidably disposed inside the other one of the two limiting channels.
7. The head-mounted display according to claim 1, wherein the auxiliary gear rack portion is perpendicular to the first gear rack portion and the second gear rack portion.
8. The head-mounted display according to claim 1, wherein a gear ratio of the first gear to the second gear is 7:4.
3329968 July 1967 Gordon
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Patent number: 10634923
Filed: Aug 30, 2019
Date of Patent: Apr 28, 2020
Patent Publication Number: 20200073130
Assignees: STARVR CORPORATION (New Taipei), Acer Incorporated (New Taipei)
Inventors: Wei-Chih Wang (New Taipei), Kuan-Lin Chen (New Taipei), Yen-Chou Chueh (New Taipei), Hui-Ping Sun (New Taipei), Chun-Hsien Chen (New Taipei)
Primary Examiner: Adrian S Wilson
Application Number: 16/556,242
Current U.S. Class: For Circumference Of Crown (2/418)
International Classification: G02B 27/01 (20060101); H05K 7/16 (20060101);


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Robertson 'striving' to make US roster for World Junior Championship
The determined Stars forward prospect will get his chance to earn a spot at the World Junior Summer Showcase
by Mark Stepneski @StarsInsideEdge / Inside Edge
There is still a long way to go until October, but there will be some players hitting the ice later this week in Kamloops, British Columbia.
Many of the top under-20 players in the world will take part in the World Junior Summer Showcase, a camp that is the first step in determining the rosters of the United States, Canada, Sweden, and Finland for the 2019 World Junior Championship.
Among the players participating will be Dallas Stars forward prospect Jason Robertson, who will be vying for a spot on Team USA's roster for World Juniors, which will be held in Vancouver and Victoria, British Columbia beginning in late December.
[FOLLOW THE STARS: Stay up to date with every summer move with the official Stars offseason tracker]
"It's a priority," Robertson said. "My No. 1 priority is to play for the Dallas Stars eventually, but (the World Junior team) is a separate goal and something I am going to work to be on. I've talked to the head coach, and he personally invited me there, so I think that is a good start."
This will be Robertson's second appearance at the World Junior Summer Showcase. He was invited to last year's event in Plymouth, Michigan and it was a learning experience for Robertson, who has never played for the USA internationally at any level. He was among the first players cut from the USA roster at last year's World Junior Summer Showcase, but expects to be better prepared this time around.
"My first time was, I wouldn't say awkward, but I wasn't in the groove doing anything USA related," Robertson said. "Going into the second year, I know what to expect. It was the first time I had ever played a Swedish team or a Finnish team. I had just watched it, never played it. Going into my second year, I understand what they are going to play like and how I should play. I am looking forward to it, and the (U.S. World Junior team) is something I want to play on."
Robertson, who turned 19 on Sunday, is coming off a second straight superb season with the Kingston Frontenacs of the Ontario Hockey League. Robertson tallied 87 points (41 goals, 46 assists) in 68 games in 2017-18, tying for sixth in the league in goals and tying for seventh in points. His 15 power-play goals tied for fifth in the league and he led the OHL with 308 shots on goal.
Video: Bogorad on why 'the countdown to October is on'
"He's got extremely quick hands, slick hands," said Rich Peverley, the Stars' player development coordinator. "You can tell he's getting a little more explosive and that's probably from the off-ice training. His shot is an NHL shot now. He can pick corners. He's got great hands and instincts around the net."
In the postseason, Robertson recorded 18 points (10 goals, eight assists) in 16 games as the Frontenacs made it to the Eastern Conference championship series, losing to fellow Stars prospect Nick Caamano's Hamilton Bulldogs. It was Kingston's longest playoff run in a quarter century.
Ask Robertson about his season, and he doesn't focus on his statistics. He prefers to talk about the deep playoff run and the leadership role he played on the team. Robertson was an alternate captain for the Frontenacs last season, wearing the "A" on his jersey during home games.
"They knew going into my third year I needed to be more of a leader not only on the ice but off the ice," Robertson said. "It was just being a confident player and being consistent every night is something I strived to do this past year to try to show how I play. I thought I did that this year. Statistically, it is what it is. Stats are stats. On the ice, I try to work hard to be a great leader for my teammates.
"We acquired some very skilled players and tried to build around that. I was lucky to be a part of that and be one of the guys they could lean on in order to make this run. It was a good season although we eventually got knocked out in the third round. It was good to get Kingston in the third round for the first time in 25 years. It was really special to do that."
The Stars selected Robertson in the second round (39th overall) of the 2017 NHL Draft. He might have gone higher, but there were questions among some scouts about his skating. That's an area he continues to work on and improve. The 6-foot-2, 200-pound Robertson, who plays right wing and shoots left-handed, made strides in other areas as well over the past year.
"The grit part, harder to get more pucks. Using my body -- my 6-2 frame -- to my advantage," he said. "The two years before, I don't think I used that a lot and didn't play as hard as a game that I could play. This past year, I've been a lot more gritty, hard to play against, harder on pucks, forechecking, and driving the net."
Video: Behind the scenes of the Stars first-round pick
Robertson was named to the OHL's Third All-Star team last season and in the annual OHL Coaches Poll he finished among the top three vote-getters in four categories in the Eastern Conference: Smartest Player (second); Most Dangerous in Goal Area (third); Best Shot (third); and Best Shootout Shooter (third).
Not long after Robertson's season ended, the Stars announced they had signed Robertson to a three-year entry-level contract, and then he headed south to spend some time with the Texas Stars. Robertson didn't play for Texas, but he got to soak up the experience of what it is like in the pros.
"It was an eye-opener. To be able to see them in the playoffs and see all these players training as hard as they can," Robertson said. "I flew in there by myself and was the only Black Ace at the time, the new guy. Some guys came in with other guys, but it was just me, and I had a lot of one-on-one time with J.J. (McQueen, a Stars player development coordinator). He went through a lot of stuff and things I need to work on. I took that back to Toronto, where I am training this summer."
Robertson is expected to play one more season in juniors, but he is paving his path to the pro ranks. He is working out this summer with highly-respected Gary Roberts, who trains many NHL players and other top prospects.
"He's taken a huge step. The door has been kicked open for him to be a professional hockey player," Peverley said. "He's training with Gary Roberts this summer, which is a huge commitment on his part. He's living up there by himself. He's training with other guys that are taking that big step, and that is ultimately going to make him a better player next year."
And while that should help push Robertson toward his long-term goal of becoming a Dallas Star, he'll take on a more immediate goal this week as he looks to put his best foot forward at the World Junior Summer Showcase in hopes of landing a spot on the USA's World Junior team.
"It wasn't meant to be last year," Robertson said. "This year is something I am really striving for, and I think I have a good chance."
2018 World Junior Summer Showcase
Robertson won't be the only Dallas prospect at the World Junior Summer Showcase, which runs from Saturday, July 28 to Saturday, Aug. 4. Forward Ty Dellandrea (first round/2018) is on Canada's roster and forward Oskar Back (third round/2018) is on Sweden's roster.
Teams will hold practice sessions over the weekend and then begin playing games on Monday, July 30.
This story was not subject to the approval of the National Hockey League or Dallas Stars Hockey Club.
Mark Stepneski is an independent writer whose posts on DallasStars.com reflect his own opinions and do not represent official statements from the Dallas Stars. Follow him on Twitter @StarsInsideEdge.
Read more: Jason Robertson, World Junior Championship, Dallas Stars
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When creating a series of workflows to help expedite your company's processes in Pipedrive, it may be helpful to know of any technical limitations that might inform how you design your workflows.
In Pipedrive's Gold plan, each user in your Pipedrive account can create 30 active workflows in the Pipedrive company account. In the Platinum plan, however, each user in your Pipedrive account can create 60 active workflows.
Each of those workflows can also have a maximum of ten actions built into it.
And each of the unique triggers for a workflow can occur once in a one-minute window, in order to prevent unmanageable loops in your process.
A company Pipedrive account can have one workflow execute a maximum of 5,000 times in a ten-minute window. That same company Pipedrive account can have all of their programmed workflows execute a maximum of 10,000 times in a ten-minute window.
Note: If you are using action events that involve your email provider, please note that your provider may also have limitations regarding how many emails that can be sent in a specific timeframe.
With how the Workflow Automation feature in Pipedrive is built, a company Pipedrive account could do up to 1,000 workflow executions in the span of one minute!


Shea Forkan (right) visits during the April 19 meet and greet.
Northwestern Energy hosted an open-house style meet-and-greet at the Lincoln Community Hall Thursday, Apr. 19, encouraging locals to stop in and get to know Lincoln's new Northwestern Energy Town Manager, Shea Forkan.


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Но после добавления нижней функции все вроде бы заработало, Но!, при нажатии на пункт меню оно закрывается, все хорошо, а при повторном открытии меню(не обновляя страницу) пункты пропадают, становятся невидимыми.
Как это исправить ?
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Kareena Kapoor wooed hers fans when she gyrated in a red saree to the tune of 'Chammak Challo'. But rival item number 'Chikni Chameli' took all the icing from Kareena's platter at the end of the year.
That did not demoralise Kareena who is staging a come back with another "desi" item number- a 'mujra'.
Her new item number, 'Dil Mera Muft Ka' is her first mujra for boyfriend Saif Ali Khan's home production 'Agent Vinod'.
Kareena has no formal training in classical dance. Owing to which the actress had to toil extra bit to get her act perfect as a dancer. She took nearly 22 hours to wrap up the song sequence.
Ace choreography Saroj Khan taught her the fine nuances of kathak (classical dance) while Manish Malhotra designed her costume. The red hot apparel with loosely tied hair completed her mujra look. The lyrics of the song 'Fenke Nazar Ke Sikke Usne... Bik Gayi Hoo Main', have already caught the fancy of netizens.
Dancing in the tune of an item songs was 'not-so-happening' thing for our Bollywood divas few years back. It was a thing for the vamps.
But now the tune has indeed changed; now if you want to seal your fate in B-town you need to do it with an item number. The original item girls like Rakhi Sawant have vanished. It's now the lead actresses like Katrina, Deepika, Bipasha, Priyanka Chopra and Kareena who will do anything for an item number in a movie.
Kareena leaped a notch ahead this time with a mujra in 'Agent Vinod'.
It seems Bebo darling is giving all out for beau Saif Ali Khan's home production. And why not, while trying to impress Chote Nawab she might also end up giving the Munnis and the Shielas a run for their money.