text:
Project acronym 5D-NanoTrack
Project Five-Dimensional Localization Microscopy for Sub-Cellular Dynamics
Researcher (PI) Yoav SHECHTMAN
Host Institution (HI) TECHNION - ISRAEL INSTITUTE OF TECHNOLOGY
Summary The sub-cellular processes that control the most critical aspects of life occur in three-dimensions (3D), and are intrinsically dynamic. While super-resolution microscopy has revolutionized cellular imaging in recent years, our current capability to observe the dynamics of life on the nanoscale is still extremely limited, due to inherent trade-offs between spatial, temporal and spectral resolution using existing approaches. We propose to develop and demonstrate an optical microscopy methodology that would enable live sub-cellular observation in unprecedented detail. Making use of multicolor 3D point-spread-function (PSF) engineering, a technique I have recently developed, we will be able to simultaneously track multiple markers inside live cells, at high speed and in five-dimensions (3D, time, and color). Multicolor 3D PSF engineering holds the potential of being a uniquely powerful method for 5D tracking. However, it is not yet applicable to live-cell imaging, due to significant bottlenecks in optical engineering and signal processing, which we plan to overcome in this project. Importantly, we will also demonstrate the efficacy of our method using a challenging biological application: real-time visualization of chromatin dynamics - the spatiotemporal organization of DNA. This is a highly suitable problem due to its fundamental importance, its role in a variety of cellular processes, and the lack of appropriate tools for studying it. The project is divided into 3 aims: 1. Technology development: diffractive-element design for multicolor 3D PSFs. 2. System design: volumetric tracking of dense emitters. 3. Live-cell measurements: chromatin dynamics. Looking ahead, here we create the imaging tools that pave the way towards the holy grail of chromatin visualization: dynamic observation of the 3D positions of the ~3 billion DNA base-pairs in a live human cell. Beyond that, our results will be applicable to numerous 3D micro/nanoscale tracking applications.
The sub-cellular processes that control the most critical aspects of life occur in three-dimensions (3D), and are intrinsically dynamic. While super-resolution microscopy has revolutionized cellular imaging in recent years, our current capability to observe the dynamics of life on the nanoscale is still extremely limited, due to inherent trade-offs between spatial, temporal and spectral resolution using existing approaches. We propose to develop and demonstrate an optical microscopy methodology that would enable live sub-cellular observation in unprecedented detail. Making use of multicolor 3D point-spread-function (PSF) engineering, a technique I have recently developed, we will be able to simultaneously track multiple markers inside live cells, at high speed and in five-dimensions (3D, time, and color). Multicolor 3D PSF engineering holds the potential of being a uniquely powerful method for 5D tracking. However, it is not yet applicable to live-cell imaging, due to significant bottlenecks in optical engineering and signal processing, which we plan to overcome in this project. Importantly, we will also demonstrate the efficacy of our method using a challenging biological application: real-time visualization of chromatin dynamics - the spatiotemporal organization of DNA. This is a highly suitable problem due to its fundamental importance, its role in a variety of cellular processes, and the lack of appropriate tools for studying it. The project is divided into 3 aims: 1. Technology development: diffractive-element design for multicolor 3D PSFs. 2. System design: volumetric tracking of dense emitters. 3. Live-cell measurements: chromatin dynamics. Looking ahead, here we create the imaging tools that pave the way towards the holy grail of chromatin visualization: dynamic observation of the 3D positions of the ~3 billion DNA base-pairs in a live human cell. Beyond that, our results will be applicable to numerous 3D micro/nanoscale tracking applications.
Project acronym ATOMICAR
Project ATOMic Insight Cavity Array Reactor
Researcher (PI) Peter Christian Kjærgaard VESBORG
Host Institution (HI) DANMARKS TEKNISKE UNIVERSITET
Summary The goal of ATOMICAR is to achieve the ultimate sensitivity limit in heterogeneous catalysis: Quantitative measurement of chemical turnover on a single catalytic nanoparticle. Most heterogeneous catalysis occurs on metal nanoparticle in the size range of 3 nm - 10 nm. Model studies have established that there is often a strong coupling between nanoparticle size & shape - and catalytic activity. The strong structure-activity coupling renders it probable that "super-active" nanoparticles exist. However, since there is no way to measure catalytic activity of less than ca 1 million nanoparticles at a time, any super-activity will always be hidden by "ensemble smearing" since one million nanoparticles of exactly identical size and shape cannot be made. The state-of-the-art in catalysis benchmarking is microfabricated flow reactors with mass-spectrometric detection, but the sensitivity of this approach cannot be incrementally improved by six orders of magnitude. This calls for a new measurement paradigm where the activity of a single nanoparticle can be benchmarked – the ultimate limit for catalytic measurement. A tiny batch reactor is the solution, but there are three key problems: How to seal it; how to track catalytic turnover inside it; and how to see the nanoparticle inside it? Graphene solves all three problems: A microfabricated cavity with a thin SixNy bottom window, a single catalytic nanoparticle inside, and a graphene seal forms a gas tight batch reactor since graphene has zero gas permeability. Catalysis is then tracked as an internal pressure change via the stress & deflection of the graphene seal. Crucially, the electron-transparency of graphene and SixNy enables subsequent transmission electron microscope access with atomic resolution so that active nanoparticles can be studied in full detail. ATOMICAR will re-define the experimental limits of catalyst benchmarking and lift the field of basic catalysis research into the single-nanoparticle age.
The goal of ATOMICAR is to achieve the ultimate sensitivity limit in heterogeneous catalysis: Quantitative measurement of chemical turnover on a single catalytic nanoparticle. Most heterogeneous catalysis occurs on metal nanoparticle in the size range of 3 nm - 10 nm. Model studies have established that there is often a strong coupling between nanoparticle size & shape - and catalytic activity. The strong structure-activity coupling renders it probable that "super-active" nanoparticles exist. However, since there is no way to measure catalytic activity of less than ca 1 million nanoparticles at a time, any super-activity will always be hidden by "ensemble smearing" since one million nanoparticles of exactly identical size and shape cannot be made. The state-of-the-art in catalysis benchmarking is microfabricated flow reactors with mass-spectrometric detection, but the sensitivity of this approach cannot be incrementally improved by six orders of magnitude. This calls for a new measurement paradigm where the activity of a single nanoparticle can be benchmarked – the ultimate limit for catalytic measurement. A tiny batch reactor is the solution, but there are three key problems: How to seal it; how to track catalytic turnover inside it; and how to see the nanoparticle inside it? Graphene solves all three problems: A microfabricated cavity with a thin SixNy bottom window, a single catalytic nanoparticle inside, and a graphene seal forms a gas tight batch reactor since graphene has zero gas permeability. Catalysis is then tracked as an internal pressure change via the stress & deflection of the graphene seal. Crucially, the electron-transparency of graphene and SixNy enables subsequent transmission electron microscope access with atomic resolution so that active nanoparticles can be studied in full detail. ATOMICAR will re-define the experimental limits of catalyst benchmarking and lift the field of basic catalysis research into the single-nanoparticle age.
Project acronym B2C
Project Beasts to Craft: BioCodicology as a new approach to the study of parchment manuscripts
Researcher (PI) Matthew COLLINS
Summary The intention of Beasts to Craft (B2C) is to document the biological and craft records in parchment in order to reveal the entangled histories of animal improvement and parchment production in Europe from 500-1900 AD. B2C will lay the foundations for a new approach to the the study of parchment manuscripts —biocodicology— which draws evidence from the overlooked first stages in production, the raising of livestock and the preparation of the skins. 1. Parchment is an extraordinary but overlooked high resolution zooarchaeological record and a molecular archive. Livestock genetics is revealing breed diversity and markers of character traits such as fleece quality. B2C will exploit this new-found knowledge, using progressively older dated archival (sheep) parchments to study the history of improvement 1300 - 1900. Visual examination of the skins will search for direct evidence of disease and fleece quality. 2. Craft skills can be read from parchment and, when combined with chemical data and comparison with modern analogues, will produce the first European wide record of the craft from 500-1900. The size and scope of this the parchment archive means it is one of the largest and most highly resolved records of a specialist medieval craft. We will explore how these skills develop and when and where regional patterns appear and decline. These two remarkable records requires a large interdisciplinary team. However biocodicology draws from and informs upon a wide and diverse spectrum of existing scholarship in conservation, the arts and sciences. A third strand of the project will (i) furnish manuscript scholars with some of the information available to the scribe at time of production (ii) inform and shape attitudes to parchment conservation (iii) provide high resolution biological data on animal management, movement and health and (iv) explore methods to link datasets and promote data reuse.
The intention of Beasts to Craft (B2C) is to document the biological and craft records in parchment in order to reveal the entangled histories of animal improvement and parchment production in Europe from 500-1900 AD. B2C will lay the foundations for a new approach to the the study of parchment manuscripts —biocodicology— which draws evidence from the overlooked first stages in production, the raising of livestock and the preparation of the skins. 1. Parchment is an extraordinary but overlooked high resolution zooarchaeological record and a molecular archive. Livestock genetics is revealing breed diversity and markers of character traits such as fleece quality. B2C will exploit this new-found knowledge, using progressively older dated archival (sheep) parchments to study the history of improvement 1300 - 1900. Visual examination of the skins will search for direct evidence of disease and fleece quality. 2. Craft skills can be read from parchment and, when combined with chemical data and comparison with modern analogues, will produce the first European wide record of the craft from 500-1900. The size and scope of this the parchment archive means it is one of the largest and most highly resolved records of a specialist medieval craft. We will explore how these skills develop and when and where regional patterns appear and decline. These two remarkable records requires a large interdisciplinary team. However biocodicology draws from and informs upon a wide and diverse spectrum of existing scholarship in conservation, the arts and sciences. A third strand of the project will (i) furnish manuscript scholars with some of the information available to the scribe at time of production (ii) inform and shape attitudes to parchment conservation (iii) provide high resolution biological data on animal management, movement and health and (iv) explore methods to link datasets and promote data reuse.
Project acronym BeadsOnString
Project Beads on String Genomics: Experimental Toolbox for Unmasking Genetic / Epigenetic Variation in Genomic DNA and Chromatin
Researcher (PI) Yuval Ebenstein
Host Institution (HI) TEL AVIV UNIVERSITY
Summary Next generation sequencing (NGS) is revolutionizing all fields of biological research but it fails to extract the full range of information associated with genetic material and is lacking in its ability to resolve variations between genomes. The high degree of genome variation exhibited both on the population level as well as between genetically "identical" cells (even in the same organ) makes genetic and epigenetic analysis on the single cell and single genome level a necessity. Chromosomes may be conceptually represented as a linear one-dimensional barcode. However, in contrast to a traditional binary barcode approach that considers only two possible bits of information (1 & 0), I will use colour and molecular structure to expand the variety of information represented in the barcode. Like colourful beads threaded on a string, where each bead represents a distinct type of observable, I will label each type of genomic information with a different chemical moiety thus expanding the repertoire of information that can be simultaneously measured. A major effort in this proposal is invested in the development of unique chemistries to enable this labelling. I specifically address three types of genomic variation: Variations in genomic layout (including DNA repeats, structural and copy number variations), variations in the patterns of chemical DNA modifications (such as methylation of cytosine bases) and variations in the chromatin composition (including nucleosome and transcription factor distributions). I will use physical extension of long DNA molecules on surfaces and in nanofluidic channels to reveal this information visually in the form of a linear, fluorescent "barcode" that is read-out by advanced imaging techniques. Similarly, DNA molecules will be threaded through a nanopore where the sequential position of "bulky" molecular groups attached to the DNA may be inferred from temporal modulation of an ionic current measured across the pore.
Next generation sequencing (NGS) is revolutionizing all fields of biological research but it fails to extract the full range of information associated with genetic material and is lacking in its ability to resolve variations between genomes. The high degree of genome variation exhibited both on the population level as well as between genetically "identical" cells (even in the same organ) makes genetic and epigenetic analysis on the single cell and single genome level a necessity. Chromosomes may be conceptually represented as a linear one-dimensional barcode. However, in contrast to a traditional binary barcode approach that considers only two possible bits of information (1 & 0), I will use colour and molecular structure to expand the variety of information represented in the barcode. Like colourful beads threaded on a string, where each bead represents a distinct type of observable, I will label each type of genomic information with a different chemical moiety thus expanding the repertoire of information that can be simultaneously measured. A major effort in this proposal is invested in the development of unique chemistries to enable this labelling. I specifically address three types of genomic variation: Variations in genomic layout (including DNA repeats, structural and copy number variations), variations in the patterns of chemical DNA modifications (such as methylation of cytosine bases) and variations in the chromatin composition (including nucleosome and transcription factor distributions). I will use physical extension of long DNA molecules on surfaces and in nanofluidic channels to reveal this information visually in the form of a linear, fluorescent "barcode" that is read-out by advanced imaging techniques. Similarly, DNA molecules will be threaded through a nanopore where the sequential position of "bulky" molecular groups attached to the DNA may be inferred from temporal modulation of an ionic current measured across the pore.
Project acronym BeyondtheElite
Project Beyond the Elite: Jewish Daily Life in Medieval Europe
Researcher (PI) Elisheva Baumgarten
Summary The two fundamental challenges of this project are the integration of medieval Jewries and their histories within the framework of European history without undermining their distinct communal status and the creation of a history of everyday medieval Jewish life that includes those who were not part of the learned elite. The study will focus on the Jewish communities of northern Europe (roughly modern Germany, northern France and England) from 1100-1350. From the mid-thirteenth century these medieval Jewish communities were subject to growing persecution. The approaches proposed to access daily praxis seek to highlight tangible dimensions of religious life rather than the more common study of ideologies to date. This task is complex because the extant sources in Hebrew as well as those in Latin and vernacular were written by the learned elite and will require a broad survey of multiple textual and material sources. Four main strands will be examined and combined: 1. An outline of the strata of Jewish society, better defining the elites and other groups. 2. A study of select communal and familial spaces such as the house, the synagogue, the market place have yet to be examined as social spaces. 3. Ritual and urban rhythms especially the annual cycle, connecting between Jewish and Christian environments. 4. Material culture, as objects were used by Jews and Christians alike. Aspects of material culture, the physical environment and urban rhythms are often described as "neutral" yet will be mined to demonstrate how they exemplified difference while being simultaneously ubiquitous in local cultures. The deterioration of relations between Jews and Christians will provide a gauge for examining change during this period. The final stage of the project will include comparative case studies of other Jewish communities. I expect my findings will inform scholars of medieval culture at large and promote comparative methodologies for studying other minority ethnic groups
The two fundamental challenges of this project are the integration of medieval Jewries and their histories within the framework of European history without undermining their distinct communal status and the creation of a history of everyday medieval Jewish life that includes those who were not part of the learned elite. The study will focus on the Jewish communities of northern Europe (roughly modern Germany, northern France and England) from 1100-1350. From the mid-thirteenth century these medieval Jewish communities were subject to growing persecution. The approaches proposed to access daily praxis seek to highlight tangible dimensions of religious life rather than the more common study of ideologies to date. This task is complex because the extant sources in Hebrew as well as those in Latin and vernacular were written by the learned elite and will require a broad survey of multiple textual and material sources. Four main strands will be examined and combined: 1. An outline of the strata of Jewish society, better defining the elites and other groups. 2. A study of select communal and familial spaces such as the house, the synagogue, the market place have yet to be examined as social spaces. 3. Ritual and urban rhythms especially the annual cycle, connecting between Jewish and Christian environments. 4. Material culture, as objects were used by Jews and Christians alike. Aspects of material culture, the physical environment and urban rhythms are often described as "neutral" yet will be mined to demonstrate how they exemplified difference while being simultaneously ubiquitous in local cultures. The deterioration of relations between Jews and Christians will provide a gauge for examining change during this period. The final stage of the project will include comparative case studies of other Jewish communities. I expect my findings will inform scholars of medieval culture at large and promote comparative methodologies for studying other minority ethnic groups
Project acronym BNYQ
Project Breaking the Nyquist Barrier: A New Paradigm in Data Conversion and Transmission
Researcher (PI) Yonina Eldar
Summary Digital signal processing (DSP) is a revolutionary paradigm shift enabling processing of physical data in the digital domain where design and implementation are considerably simplified. However, state-of-the-art analog-to-digital convertors (ADCs) preclude high-rate wideband sampling and processing with low cost and energy consumption, presenting a major bottleneck. This is mostly due to a traditional assumption that sampling must be performed at the Nyquist rate, that is, twice the signal bandwidth. Modern applications including communications, medical imaging, radar and more use signals with high bandwidth, resulting in prohibitively large Nyquist rates. Our ambitious goal is to introduce a paradigm shift in ADC design that will enable systems capable of low-rate, wideband sensing and low-rate DSP. While DSP has a rich history in exploiting structure to reduce dimensionality and perform efficient parameter extraction, current ADCs do not exploit such knowledge. We challenge current practice that separates the sampling stage from the processing stage and exploit structure in analog signals already in the ADC, to drastically reduce the sampling and processing rates. Our preliminary data shows that this allows substantial savings in sampling and processing rates --- we show rate reduction of 1/28 in ultrasound imaging, and 1/30 in radar detection. To achieve our overreaching goal we focus on three interconnected objectives -- developing the 1) theory 2) hardware and 3) applications of sub-Nyquist sampling. Our methodology ties together two areas on the frontier of signal processing: compressed sensing (CS), focused on finite length vectors, and analog sampling. Our research plan also inherently relies on advances in several other important areas within signal processing and combines multi-disciplinary research at the intersection of signal processing, information theory, optimization, estimation theory and hardware design.
Digital signal processing (DSP) is a revolutionary paradigm shift enabling processing of physical data in the digital domain where design and implementation are considerably simplified. However, state-of-the-art analog-to-digital convertors (ADCs) preclude high-rate wideband sampling and processing with low cost and energy consumption, presenting a major bottleneck. This is mostly due to a traditional assumption that sampling must be performed at the Nyquist rate, that is, twice the signal bandwidth. Modern applications including communications, medical imaging, radar and more use signals with high bandwidth, resulting in prohibitively large Nyquist rates. Our ambitious goal is to introduce a paradigm shift in ADC design that will enable systems capable of low-rate, wideband sensing and low-rate DSP. While DSP has a rich history in exploiting structure to reduce dimensionality and perform efficient parameter extraction, current ADCs do not exploit such knowledge. We challenge current practice that separates the sampling stage from the processing stage and exploit structure in analog signals already in the ADC, to drastically reduce the sampling and processing rates. Our preliminary data shows that this allows substantial savings in sampling and processing rates --- we show rate reduction of 1/28 in ultrasound imaging, and 1/30 in radar detection. To achieve our overreaching goal we focus on three interconnected objectives -- developing the 1) theory 2) hardware and 3) applications of sub-Nyquist sampling. Our methodology ties together two areas on the frontier of signal processing: compressed sensing (CS), focused on finite length vectors, and analog sampling. Our research plan also inherently relies on advances in several other important areas within signal processing and combines multi-disciplinary research at the intersection of signal processing, information theory, optimization, estimation theory and hardware design.
Project acronym CartiLube
Project Lubricating Cartilage: exploring the relation between lubrication and gene-regulation to alleviate osteoarthritis
Researcher (PI) Jacob KLEIN
Summary Can we exploit insights from the remarkably lubricated surfaces of articular cartilage, to create lubricants that may alleviate osteoarthritis (OA), the most widespread joint disease, affecting millions? These, succinctly, are the challenges of the present proposal. They are driven by our recent finding that lubrication of destabilised joints leads to changes in gene-regulation of the cartilage-embedded chondrocytes to protect against development of the disease. OA alleviation is known to arise through orthopedically suppressing shear-stresses on the cartilage, and a central premise of this project is that, by reducing friction at the articulating cartilage through suitable lubrication, we may achieve the same beneficial effect on the disease. The objectives of this project are to better understand the origins of cartilage boundary lubrication through examination of friction-reduction by its main molecular components, and exploit that understanding to create lubricants that, on intra-articular injection, will lubricate cartilage sufficiently well to achieve alleviation of OA via gene regulation. The project will examine, via both nanotribometric and macroscopic measurements, how the main molecular species implicated in cartilage lubrication, lipids, hyaluronan and lubricin, and their combinations, act together to form optimally lubricating boundary layers on model surfaces as well as on excised cartilage. Based on this, we shall develop suitable materials to lubricate cartilage in joints, using mouse models. Lubricants will further be optimized with respect to their retention in the joint and cartilage targeting, both in model studies and in vivo. The effect of the lubricants in regulating gene expression, in reducing pain and cartilage degradation, and in promoting stem-cell adhesion to the cartilage will be studied in a mouse model in which OA has been induced. Our results will have implications for treatment of a common, debilitating disease.
Can we exploit insights from the remarkably lubricated surfaces of articular cartilage, to create lubricants that may alleviate osteoarthritis (OA), the most widespread joint disease, affecting millions? These, succinctly, are the challenges of the present proposal. They are driven by our recent finding that lubrication of destabilised joints leads to changes in gene-regulation of the cartilage-embedded chondrocytes to protect against development of the disease. OA alleviation is known to arise through orthopedically suppressing shear-stresses on the cartilage, and a central premise of this project is that, by reducing friction at the articulating cartilage through suitable lubrication, we may achieve the same beneficial effect on the disease. The objectives of this project are to better understand the origins of cartilage boundary lubrication through examination of friction-reduction by its main molecular components, and exploit that understanding to create lubricants that, on intra-articular injection, will lubricate cartilage sufficiently well to achieve alleviation of OA via gene regulation. The project will examine, via both nanotribometric and macroscopic measurements, how the main molecular species implicated in cartilage lubrication, lipids, hyaluronan and lubricin, and their combinations, act together to form optimally lubricating boundary layers on model surfaces as well as on excised cartilage. Based on this, we shall develop suitable materials to lubricate cartilage in joints, using mouse models. Lubricants will further be optimized with respect to their retention in the joint and cartilage targeting, both in model studies and in vivo. The effect of the lubricants in regulating gene expression, in reducing pain and cartilage degradation, and in promoting stem-cell adhesion to the cartilage will be studied in a mouse model in which OA has been induced. Our results will have implications for treatment of a common, debilitating disease.
Project acronym CHEMHEAT
Project Chemical Control of Heating and Cooling in Molecular Junctions: Optimizing Function and Stability
Researcher (PI) Gemma Solomon
Summary Nanoscale systems binding single molecules, or small numbers of molecules, in conducting junctions show considerable promise for a range of technological applications, from photovoltaics to rectifiers to sensors. These environments differ significantly from the traditional domain of chemical studies involving molecules in solution and the gas phase, necessitating renewed efforts to understand the physical properties of these systems. The objective of this proposal concerns one particular class of physical processes: understanding and controlling local heating in molecular junctions in terms of excitation, dissipation and transfer. Local heating and dissipation in molecular junctions has long been a concern due to the possibly detrimental impact on device stability and function. More recently there has been increased interest, as these processes underlie both spectroscopic techniques and potential technological applications. Together these issues make an investigation of ways to chemically control local heating in molecular junctions timely and important. The proposal objective will be addressed through the investigation of three challenges: - Developing chemical control of local heating in molecular junctions. - Developing chemical control of heat dissipation in molecular junctions. - Design of optimal thermoelectric materials. These three challenges constitute distinct, yet complementary, avenues for investigation with progress in each area supporting the other two. All three challenges build on existing theoretical methods, with the important shift of focus to methods to achieve chemical control. The combination of state-of-the-art computational methods with careful chemical studies promises significant new developments for the area.
Nanoscale systems binding single molecules, or small numbers of molecules, in conducting junctions show considerable promise for a range of technological applications, from photovoltaics to rectifiers to sensors. These environments differ significantly from the traditional domain of chemical studies involving molecules in solution and the gas phase, necessitating renewed efforts to understand the physical properties of these systems. The objective of this proposal concerns one particular class of physical processes: understanding and controlling local heating in molecular junctions in terms of excitation, dissipation and transfer. Local heating and dissipation in molecular junctions has long been a concern due to the possibly detrimental impact on device stability and function. More recently there has been increased interest, as these processes underlie both spectroscopic techniques and potential technological applications. Together these issues make an investigation of ways to chemically control local heating in molecular junctions timely and important. The proposal objective will be addressed through the investigation of three challenges: - Developing chemical control of local heating in molecular junctions. - Developing chemical control of heat dissipation in molecular junctions. - Design of optimal thermoelectric materials. These three challenges constitute distinct, yet complementary, avenues for investigation with progress in each area supporting the other two. All three challenges build on existing theoretical methods, with the important shift of focus to methods to achieve chemical control. The combination of state-of-the-art computational methods with careful chemical studies promises significant new developments for the area.
Project acronym CISS
Project Chiral Induced Spin Selectivity
Researcher (PI) Ron Naaman
Summary The overall objective is to fully understand the Chiral Induced Spin Selectivity (CISS) effect, which was discovered recently. It was found that the transmission or conduction of electrons through chiral molecules is spin dependent. The CISS effect is a change in the pradigm that assumed that any spin manipulation requiers magnetic materials or materials with high spin-orbit coupling. These unexpected new findings open new possibilities for applying chiral molecules in spintronics applications and may provide new insights on electron transfer processes in Biology. The specific goals of the proposed research are (i) To establish the parameters that affect the magnitude of the CISS effect. (ii) To demonstrate spintronics devices (memory and transistors) that are based on the CISS effect. (iii) To investigate the role of CISS in electron transfer in biology related systems. The experiments will be performed applying a combination of experimental methods including photoelectron spectroscopy, single molecule conduction, light-induced electron transfer, and spin specific conduction through magneto-electric devices. The project has a potential to have very large impact on various fields from Physics to Biology. It will result in the establishment of chiral organic molecules as a new substrate for wide range of spintronics related applications including magnetic memory, and in determining whether spins play a role in electron transfer processes in biology.
The overall objective is to fully understand the Chiral Induced Spin Selectivity (CISS) effect, which was discovered recently. It was found that the transmission or conduction of electrons through chiral molecules is spin dependent. The CISS effect is a change in the pradigm that assumed that any spin manipulation requiers magnetic materials or materials with high spin-orbit coupling. These unexpected new findings open new possibilities for applying chiral molecules in spintronics applications and may provide new insights on electron transfer processes in Biology. The specific goals of the proposed research are (i) To establish the parameters that affect the magnitude of the CISS effect. (ii) To demonstrate spintronics devices (memory and transistors) that are based on the CISS effect. (iii) To investigate the role of CISS in electron transfer in biology related systems. The experiments will be performed applying a combination of experimental methods including photoelectron spectroscopy, single molecule conduction, light-induced electron transfer, and spin specific conduction through magneto-electric devices. The project has a potential to have very large impact on various fields from Physics to Biology. It will result in the establishment of chiral organic molecules as a new substrate for wide range of spintronics related applications including magnetic memory, and in determining whether spins play a role in electron transfer processes in biology.
Project acronym CLIOARCH
Project Cliodynamic archaeology: Computational approaches to Final Palaeolithic/earliest Mesolithic archaeology and climate change
Researcher (PI) Felix RIEDE
Summary Late Pleistocene/early Holocene Europe is said to be the ideal laboratory for the investigation of human responses to rapidly changing climates and environments, migration and adaptation. Yet, pinpointing precisely how and why contemporaneous Final Palaeolithic/earliest Mesolithic (15,000-11,000 years BP) foragers migrated, and which environmental or other factors they adapted to – or failed to – has remained remarkably elusive. At the core of ClioArch is the radical but, in light of research-historical insights, necessary hypothesis that the current archaeological cultural taxonomy for this iconic period of European prehistory is epistemologically flawed and that operationalisations and interpretations based on this traditional taxonomy – especially those that seek to relate observed changes in material culture and land-use to contemporaneous climatic and environmental changes – are therefore problematic. Hence, novel approaches to crafting the taxonomic building blocks are required, as are novel analyses of human|environment relations in this period. ClioArch's premier ambition is to provide operational cultural taxonomies for the Final Palaeolithic/earliest Mesolithic of Europe and to couple these with interdisciplinary cultural evolutionary, quantitative ecological methods and field archaeological investigations beyond the state-of-the-art, so as to better capture such adaptations – almost certainly with major implications for the standard culture-historical narrative relating to this period. In so doing, the project will pioneer a fully transparent and replicable – and eminently transferable – methodology for the study of the impacts of climate change and extreme environmental events in deep history. In turn, such a quantitative understanding of past adaptive dynamics will position archaeology more centrally in contemporary debates about climate change, environmental catastrophe and their cultural dimensions.
Late Pleistocene/early Holocene Europe is said to be the ideal laboratory for the investigation of human responses to rapidly changing climates and environments, migration and adaptation. Yet, pinpointing precisely how and why contemporaneous Final Palaeolithic/earliest Mesolithic (15,000-11,000 years BP) foragers migrated, and which environmental or other factors they adapted to – or failed to – has remained remarkably elusive. At the core of ClioArch is the radical but, in light of research-historical insights, necessary hypothesis that the current archaeological cultural taxonomy for this iconic period of European prehistory is epistemologically flawed and that operationalisations and interpretations based on this traditional taxonomy – especially those that seek to relate observed changes in material culture and land-use to contemporaneous climatic and environmental changes – are therefore problematic. Hence, novel approaches to crafting the taxonomic building blocks are required, as are novel analyses of human|environment relations in this period. ClioArch's premier ambition is to provide operational cultural taxonomies for the Final Palaeolithic/earliest Mesolithic of Europe and to couple these with interdisciplinary cultural evolutionary, quantitative ecological methods and field archaeological investigations beyond the state-of-the-art, so as to better capture such adaptations – almost certainly with major implications for the standard culture-historical narrative relating to this period. In so doing, the project will pioneer a fully transparent and replicable – and eminently transferable – methodology for the study of the impacts of climate change and extreme environmental events in deep history. In turn, such a quantitative understanding of past adaptive dynamics will position archaeology more centrally in contemporary debates about climate change, environmental catastrophe and their cultural dimensions.


text:
Q: Permission denied in Python After installing Python on my Mac I probertly made an error.
Pressing the Build command it said
[Errno 13] Permission denied
[cmd: ['/usr/local/bin/python3.5', '-u', '/Users/peter/Library/Application Support/Sublime Text 3/Packages/User/test-module.py']]
[dir: /Users/peter/Library/Application Support/Sublime Text 3/Packages/User]
[path: /Library/Frameworks/Python.framework/Versions/3.6/bin:/Library/Frameworks/Python.framework/Versions/3.6/bin:/Library/Frameworks/Python.framework/Versions/3.6/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Users/peter/.nexustools]

How do I fix it?

A: You have not access to run python script in the account or the terminal. You can use to "sudo" or create virtualenv https://virtualenvwrapper.readthedocs.io/en/latest/

redpajama_set_name: RedPajamaStackExchange