He linear electron resonator is constructed on a Ag (111) surface at 6 K substrate temperature. The silver cluster at the middle (at the initial part of the movie) is produced by gently crashing the STM-tip into the substrate. The cluster is then broken into smaller clusters using the STM-tip. The individual silver atoms are extracted from the cluster on an atom-by-atom basis.
This document provides an overview of nanotechnology, including key facts about its scale in nanometers, major public investments in research, approaches such as top-down and bottom-up, potential applications in areas like food and cosmetics, and implementation tools like atomic force microscopes. It also touches on ongoing work in nanotoxicology, health and environmental concerns, and the story so far in regulation.
With this presentation developed within the NANOYOU project you will discover some of the secrets of the nanoscale and will learn about the applications of nanotechnologies.
For more resources on nanotechnologies you can visit: www.nanoyou.eu
Translations to several languages are also availabe in the NANOYOU website.
Nanotechnologies: Benefits and risks for developed and developing countriesNANOYOU
With this presentation developed within the NANOYOU project you will learn about the ethical, legal and social aspects of nanotechnologies, with a special emphasis on the benefits and risks for the developed and developing countries.
For more materials on nanotechnologies visit: www.nanoyou.eu
Translations to several languages are also availabe in the NANOYOU website.
Nanotechnology has applications in agriculture to address challenges like declining soil quality and nutrient deficiencies. It can be used to precisely deliver nutrients and pesticides to promote productivity while ensuring environmental safety. Examples include nano-fertilizers, nano-herbicides, and nano-sensors. Nanotechnology is also being used in food packaging to increase shelf life, such as bottles that prevent carbon dioxide leakage and films packed with nanoparticles to reduce oxygen flow and moisture leakage. Nanosensors can also detect bacteria, contaminants, and food spoilage.
Nanotechnology involves manipulating matter at the atomic or molecular scale. It has the potential to impact many fields like electronics, materials science, and medicine. Some key points:
- Richard Feynman first proposed the concept of nanotechnology in 1959, and the term was coined in 1974. Major developments include the discovery of buckyballs and carbon nanotubes in the 1980s and 1990s.
- Nanotechnology can be used to create new materials with unique properties due to their small size. It allows engineering at the molecular level.
- Applications include using nanoparticles for drug delivery, more efficient solar cells, stain-resistant textiles, and lightweight materials for vehicles and aerospace. Challenges include high costs
Nanotechnology involves manipulating and controlling materials at the nanoscale, which is approximately 1 to 100 nanometers. It has applications in many areas such as electronics, energy, medicine, and water filtration. Some key benefits of nanotechnology include developing stronger and lighter materials, more effective cancer treatments, and improved solar cells and membranes for water filtration that remove particles down to a few nanometers in size. The future of nanotechnology involves further development of self-assembly techniques to build complex structures at the nanoscale.
This document provides information about the "Innovation in Environmental Monitoring" conference being held on September 21-22, 2016 at the University of York. The conference will bring together leaders from academia, industry, and regulatory organizations to discuss current practices and future opportunities for monitoring air, soil, and water quality. The program includes keynote speakers, sessions on various environmental monitoring topics, and a panel discussion on the future of the field.
The two-day conference brought together leaders in academia, industry, and regulators to discuss innovation in environmental monitoring of air and water. Over the course of presentations and panel discussions, attendees explored current practices and future opportunities in areas like pollution assessment, sensor technology, water quality monitoring, and more. The University of York hosted the event, which was organized by CAPACITIE and Sensor100 and included keynotes on monitoring air quality, emerging pollutants, and low-cost sensor networks. Poster presentations addressed topics such as passive sampling and calibrating low-cost sensors.
This document provides an overview of nanotechnology, including key facts about its scale in nanometers, major public investments in research, approaches such as top-down and bottom-up, potential applications in areas like food and cosmetics, and implementation tools like atomic force microscopes. It also touches on ongoing work in nanotoxicology, health and environmental concerns, and the story so far in regulation.
With this presentation developed within the NANOYOU project you will discover some of the secrets of the nanoscale and will learn about the applications of nanotechnologies.
For more resources on nanotechnologies you can visit: www.nanoyou.eu
Translations to several languages are also availabe in the NANOYOU website.
Nanotechnologies: Benefits and risks for developed and developing countriesNANOYOU
With this presentation developed within the NANOYOU project you will learn about the ethical, legal and social aspects of nanotechnologies, with a special emphasis on the benefits and risks for the developed and developing countries.
For more materials on nanotechnologies visit: www.nanoyou.eu
Translations to several languages are also availabe in the NANOYOU website.
Nanotechnology has applications in agriculture to address challenges like declining soil quality and nutrient deficiencies. It can be used to precisely deliver nutrients and pesticides to promote productivity while ensuring environmental safety. Examples include nano-fertilizers, nano-herbicides, and nano-sensors. Nanotechnology is also being used in food packaging to increase shelf life, such as bottles that prevent carbon dioxide leakage and films packed with nanoparticles to reduce oxygen flow and moisture leakage. Nanosensors can also detect bacteria, contaminants, and food spoilage.
Nanotechnology involves manipulating matter at the atomic or molecular scale. It has the potential to impact many fields like electronics, materials science, and medicine. Some key points:
- Richard Feynman first proposed the concept of nanotechnology in 1959, and the term was coined in 1974. Major developments include the discovery of buckyballs and carbon nanotubes in the 1980s and 1990s.
- Nanotechnology can be used to create new materials with unique properties due to their small size. It allows engineering at the molecular level.
- Applications include using nanoparticles for drug delivery, more efficient solar cells, stain-resistant textiles, and lightweight materials for vehicles and aerospace. Challenges include high costs
Nanotechnology involves manipulating and controlling materials at the nanoscale, which is approximately 1 to 100 nanometers. It has applications in many areas such as electronics, energy, medicine, and water filtration. Some key benefits of nanotechnology include developing stronger and lighter materials, more effective cancer treatments, and improved solar cells and membranes for water filtration that remove particles down to a few nanometers in size. The future of nanotechnology involves further development of self-assembly techniques to build complex structures at the nanoscale.
This document provides information about the "Innovation in Environmental Monitoring" conference being held on September 21-22, 2016 at the University of York. The conference will bring together leaders from academia, industry, and regulatory organizations to discuss current practices and future opportunities for monitoring air, soil, and water quality. The program includes keynote speakers, sessions on various environmental monitoring topics, and a panel discussion on the future of the field.
The two-day conference brought together leaders in academia, industry, and regulators to discuss innovation in environmental monitoring of air and water. Over the course of presentations and panel discussions, attendees explored current practices and future opportunities in areas like pollution assessment, sensor technology, water quality monitoring, and more. The University of York hosted the event, which was organized by CAPACITIE and Sensor100 and included keynotes on monitoring air quality, emerging pollutants, and low-cost sensor networks. Poster presentations addressed topics such as passive sampling and calibrating low-cost sensors.
This document discusses nanotechnology and product liability from the perspective of Lovells LLP. It provides an overview of nanotechnology, including definitions, structures, properties and applications. It also discusses challenges in assessing risks from nanomaterials due to issues like detection and toxicity testing. Concerns are raised about carbon nanotubes resembling asbestos fibers. The document reviews regulations like REACH that may apply to nanomaterials and concludes with a discussion of how new technologies impact concepts of defect in product liability law.
4460 lwdlib02 #2319260-v2-biicl-presentationRubel Alam
This document discusses nanotechnology and product liability from the perspective of Lovells LLP. It provides an overview of nanotechnology, including definitions, structures, properties and applications. It also discusses challenges in assessing risks from nanomaterials due to issues like detection and toxicity testing. Concerns are raised about carbon nanotubes resembling asbestos fibers. The document reviews regulations like REACH and their application to nanomaterials. It concludes by outlining issues around new technology, development risks, and relative responsibilities for innovators, suppliers and regulators regarding product liability for nanotechnology.
This document discusses nanotechnology and product liability from the perspective of Lovells LLP. It provides an overview of nanotechnology, including definitions, structures, properties and applications. It also discusses challenges in assessing risks from nanomaterials due to issues like detection and toxicity testing. Concerns are raised about carbon nanotubes resembling asbestos fibers. The document outlines regulations like REACH that may apply to nanomaterials and open questions around developing an understanding of risks and responsibilities for innovation.
This document discusses the challenges and opportunities of nanotechnology. It begins by defining nanotechnology and nanoscience and providing examples of nanostructures. It then discusses some applications of nanotechnology while also outlining potential risks such as health effects. The document focuses on challenges like assessing risks given nanoparticles' small size and difficulty in detection. It provides details on challenges regulating nanotechnology under existing frameworks. Carbon nanotubes are discussed as an area of both opportunity and health concern, like possible similarities to asbestos.
shiva guru 922219114020 -nanotechnology.pptThalaJeeva
Nanotechnology promises benefits but also raises questions about risks. Precisely defining nanoscale materials is difficult given properties change significantly below 100nm. Research shows varied health effects depending on dose, type and purity of nanomaterials like carbon nanotubes. Regulating nanotechnology poses challenges as effects are often unknown and current tests may not apply. Adaptations of laws like REACH aim to ensure safety but coverage of novel nanomaterials is uncertain given lack of data and testing guidelines. More research is clearly needed to understand health and environmental impacts and inform appropriate oversight of nanotechnology.
The design, characterization, and application of structures, devices, and systems by controlled manipulation of size and shape of materials at the nanometer scale (atomic, molecular, and macromolecular scale
The document summarizes key concepts about nanotechnology including:
1. Nanotechnology involves creating functional materials and devices at the nanoscale (1-100 nm) where new properties and functionalities emerge.
2. Some applications of nanotechnology include more efficient energy production, improved medical treatments and diagnostics, enhanced consumer products, and information technology.
3. While nanotechnology promises many benefits, health and environmental risks from exposure to nanomaterials need further research as their effects are still uncertain. Careful assessment of nanomaterial interactions is important.
Lorie Sheremeta_ A life cycle approach to understanding and managing risks an...Ne3LS_Network
This document discusses a life-cycle approach to understanding and managing risks and benefits of nanotechnology. It covers definitional issues related to nanotechnology, materials of interest from R&D to end of life, challenges, and the need for international coordination on environmental, health and safety research and regulations. Key points discussed include differentiating nanomaterials, nanoparticles and nanowaste; properties that change at the nanoscale; regulatory complexity; priority materials for risk assessment; and applications in environmental remediation and potential issues like ocean iron fertilization. Maintaining public trust through education, engagement and responsible development is emphasized.
The document discusses the potential applications of nanotechnology for site remediation. It describes how nanomaterials like nanoparticles and nanoscale zeolites could be used to detect, filter, and break down environmental contaminants more efficiently. The document outlines EPA research on using nanotechnology to address challenges in green manufacturing, contamination cleanup, and waste treatment. It also provides examples of how nanomaterials like thiol-functionalized nanoparticles and swellable organosilica are being tested and applied to remediate mercury, volatile organic compounds, and other pollutants in soils and water.
Nanotechnology involves manipulating matter at the atomic and molecular scales. Key tools in nanoscience include scanning probe microscopes like the scanning tunneling microscope and atomic force microscope, which can image surfaces at the atomic level. Potential applications of nanotechnology include improving medicine through more targeted drug delivery, enhancing energy storage and conversion, treating diseases, and addressing environmental problems like pollution. While nanotechnology holds promise, its health and environmental risks require further research and regulation to ensure its safe development and use.
The document discusses nanoparticles and carbon nano tubes. It summarizes topics from a workshop including assessing the environmental aspects and latest research on nanoparticles, establishing material safety standards for producers and consumers, and properties of nanoparticles less than 100nm. It notes nanoparticles have different properties than bulk materials and discusses exposure concerns from manufacturing, the environment, and public health. It stresses the need to determine nanoparticle chemistry, physics, and biology to understand uptake and effects, and establish standards while considering exposure levels during risk assessments.
Nanotechnology involves working with materials at the nanoscale, between 1 to 100 nanometers. At this scale, materials exhibit unique properties and phenomena. Nanomaterials are being used in a variety of applications due to their small size and novel properties. However, their small size also poses challenges for assessing potential risks to human health and the environment.
Nanotechnology involves manipulating materials at the nanoscale (1-100 nm) to create structures with novel properties. There are different classifications of nanostructures based on their dimensions, including zero-dimensional (0D), one-dimensional (1D), two-dimensional (2D), and three-dimensional (3D). Nanotechnology has applications in medicine such as drug delivery and tissue engineering, information/communication such as memory storage and displays, heavy industry such as catalysis, and consumer goods such as foods and cosmetics. Environmental applications include using nanoparticles for carbon capture, pollutant sensors, heavy metal remediation, and wastewater treatment.
Nanotechnology involves working at the nanoscale level between 1 to 100 nanometers. It can be used to create new materials and devices with unique properties not seen in larger structures. There are two main approaches - top-down and bottom-up. Top-down begins with bulk material and cuts it down to the nano size, while bottom-up builds nanostructures from individual atoms and molecules. Nanotechnology has many applications in medicine like drug delivery, electronics with smaller transistors, renewable energy, and more. However, there are also concerns about potential health effects and environmental impacts that require further research before widespread adoption. The future of nanotechnology looks promising but careful development is needed to address challenges.
This document discusses the risks of nanotechnology related to soil, air and water pollution. It begins by outlining the objectives of understanding the nature and characteristics of nanoparticles, the manufacturing processes used and their byproducts, and how nanoparticles may behave in the environment. It then discusses some examples of consumer products containing nanoparticles and potential health issues if nanoparticles are inhaled, ingested or absorbed through skin. Environmental groups are concerned about a lack of research on nanoparticle impacts and the need for regulation and oversight of nanotechnology. In conclusion, while nanotechnology has potential benefits, new risk assessment and regulatory approaches may be needed to understand and mitigate potential negative environmental and health impacts.
chaminaameen@gmail.com
Amina Ameen
Ask me for any other help for PowerPoint slides on my email I'd. I will love to help you in your PowerPoint assignments.
Thanks.
Nanotechnology has applications in combating cancer and reducing pollution, energy use, and greenhouse gas emissions. The NCI Alliance for Nanotechnology in Cancer is working to ensure responsible development of nanotechnologies for cancer treatment and diagnosis. While nanoparticles exist naturally and as byproducts of human activities, their small size raises health and safety concerns that require careful study. The NCI's Nanotechnology Characterization Laboratory evaluates over 125 nanoparticles intended for medical use to better understand their impacts and ensure safety.
ESPP presentation to EU Waste Water Network, 4th June 2024 “EU policies driving nutrient removal and recycling
and the revised UWWTD (Urban Waste Water Treatment Directive)”
hematic appreciation test is a psychological assessment tool used to measure an individual's appreciation and understanding of specific themes or topics. This test helps to evaluate an individual's ability to connect different ideas and concepts within a given theme, as well as their overall comprehension and interpretation skills. The results of the test can provide valuable insights into an individual's cognitive abilities, creativity, and critical thinking skills
This document discusses nanotechnology and product liability from the perspective of Lovells LLP. It provides an overview of nanotechnology, including definitions, structures, properties and applications. It also discusses challenges in assessing risks from nanomaterials due to issues like detection and toxicity testing. Concerns are raised about carbon nanotubes resembling asbestos fibers. The document reviews regulations like REACH that may apply to nanomaterials and concludes with a discussion of how new technologies impact concepts of defect in product liability law.
4460 lwdlib02 #2319260-v2-biicl-presentationRubel Alam
This document discusses nanotechnology and product liability from the perspective of Lovells LLP. It provides an overview of nanotechnology, including definitions, structures, properties and applications. It also discusses challenges in assessing risks from nanomaterials due to issues like detection and toxicity testing. Concerns are raised about carbon nanotubes resembling asbestos fibers. The document reviews regulations like REACH and their application to nanomaterials. It concludes by outlining issues around new technology, development risks, and relative responsibilities for innovators, suppliers and regulators regarding product liability for nanotechnology.
This document discusses nanotechnology and product liability from the perspective of Lovells LLP. It provides an overview of nanotechnology, including definitions, structures, properties and applications. It also discusses challenges in assessing risks from nanomaterials due to issues like detection and toxicity testing. Concerns are raised about carbon nanotubes resembling asbestos fibers. The document outlines regulations like REACH that may apply to nanomaterials and open questions around developing an understanding of risks and responsibilities for innovation.
This document discusses the challenges and opportunities of nanotechnology. It begins by defining nanotechnology and nanoscience and providing examples of nanostructures. It then discusses some applications of nanotechnology while also outlining potential risks such as health effects. The document focuses on challenges like assessing risks given nanoparticles' small size and difficulty in detection. It provides details on challenges regulating nanotechnology under existing frameworks. Carbon nanotubes are discussed as an area of both opportunity and health concern, like possible similarities to asbestos.
shiva guru 922219114020 -nanotechnology.pptThalaJeeva
Nanotechnology promises benefits but also raises questions about risks. Precisely defining nanoscale materials is difficult given properties change significantly below 100nm. Research shows varied health effects depending on dose, type and purity of nanomaterials like carbon nanotubes. Regulating nanotechnology poses challenges as effects are often unknown and current tests may not apply. Adaptations of laws like REACH aim to ensure safety but coverage of novel nanomaterials is uncertain given lack of data and testing guidelines. More research is clearly needed to understand health and environmental impacts and inform appropriate oversight of nanotechnology.
The design, characterization, and application of structures, devices, and systems by controlled manipulation of size and shape of materials at the nanometer scale (atomic, molecular, and macromolecular scale
The document summarizes key concepts about nanotechnology including:
1. Nanotechnology involves creating functional materials and devices at the nanoscale (1-100 nm) where new properties and functionalities emerge.
2. Some applications of nanotechnology include more efficient energy production, improved medical treatments and diagnostics, enhanced consumer products, and information technology.
3. While nanotechnology promises many benefits, health and environmental risks from exposure to nanomaterials need further research as their effects are still uncertain. Careful assessment of nanomaterial interactions is important.
Lorie Sheremeta_ A life cycle approach to understanding and managing risks an...Ne3LS_Network
This document discusses a life-cycle approach to understanding and managing risks and benefits of nanotechnology. It covers definitional issues related to nanotechnology, materials of interest from R&D to end of life, challenges, and the need for international coordination on environmental, health and safety research and regulations. Key points discussed include differentiating nanomaterials, nanoparticles and nanowaste; properties that change at the nanoscale; regulatory complexity; priority materials for risk assessment; and applications in environmental remediation and potential issues like ocean iron fertilization. Maintaining public trust through education, engagement and responsible development is emphasized.
The document discusses the potential applications of nanotechnology for site remediation. It describes how nanomaterials like nanoparticles and nanoscale zeolites could be used to detect, filter, and break down environmental contaminants more efficiently. The document outlines EPA research on using nanotechnology to address challenges in green manufacturing, contamination cleanup, and waste treatment. It also provides examples of how nanomaterials like thiol-functionalized nanoparticles and swellable organosilica are being tested and applied to remediate mercury, volatile organic compounds, and other pollutants in soils and water.
Nanotechnology involves manipulating matter at the atomic and molecular scales. Key tools in nanoscience include scanning probe microscopes like the scanning tunneling microscope and atomic force microscope, which can image surfaces at the atomic level. Potential applications of nanotechnology include improving medicine through more targeted drug delivery, enhancing energy storage and conversion, treating diseases, and addressing environmental problems like pollution. While nanotechnology holds promise, its health and environmental risks require further research and regulation to ensure its safe development and use.
The document discusses nanoparticles and carbon nano tubes. It summarizes topics from a workshop including assessing the environmental aspects and latest research on nanoparticles, establishing material safety standards for producers and consumers, and properties of nanoparticles less than 100nm. It notes nanoparticles have different properties than bulk materials and discusses exposure concerns from manufacturing, the environment, and public health. It stresses the need to determine nanoparticle chemistry, physics, and biology to understand uptake and effects, and establish standards while considering exposure levels during risk assessments.
Nanotechnology involves working with materials at the nanoscale, between 1 to 100 nanometers. At this scale, materials exhibit unique properties and phenomena. Nanomaterials are being used in a variety of applications due to their small size and novel properties. However, their small size also poses challenges for assessing potential risks to human health and the environment.
Nanotechnology involves manipulating materials at the nanoscale (1-100 nm) to create structures with novel properties. There are different classifications of nanostructures based on their dimensions, including zero-dimensional (0D), one-dimensional (1D), two-dimensional (2D), and three-dimensional (3D). Nanotechnology has applications in medicine such as drug delivery and tissue engineering, information/communication such as memory storage and displays, heavy industry such as catalysis, and consumer goods such as foods and cosmetics. Environmental applications include using nanoparticles for carbon capture, pollutant sensors, heavy metal remediation, and wastewater treatment.
Nanotechnology involves working at the nanoscale level between 1 to 100 nanometers. It can be used to create new materials and devices with unique properties not seen in larger structures. There are two main approaches - top-down and bottom-up. Top-down begins with bulk material and cuts it down to the nano size, while bottom-up builds nanostructures from individual atoms and molecules. Nanotechnology has many applications in medicine like drug delivery, electronics with smaller transistors, renewable energy, and more. However, there are also concerns about potential health effects and environmental impacts that require further research before widespread adoption. The future of nanotechnology looks promising but careful development is needed to address challenges.
This document discusses the risks of nanotechnology related to soil, air and water pollution. It begins by outlining the objectives of understanding the nature and characteristics of nanoparticles, the manufacturing processes used and their byproducts, and how nanoparticles may behave in the environment. It then discusses some examples of consumer products containing nanoparticles and potential health issues if nanoparticles are inhaled, ingested or absorbed through skin. Environmental groups are concerned about a lack of research on nanoparticle impacts and the need for regulation and oversight of nanotechnology. In conclusion, while nanotechnology has potential benefits, new risk assessment and regulatory approaches may be needed to understand and mitigate potential negative environmental and health impacts.
chaminaameen@gmail.com
Amina Ameen
Ask me for any other help for PowerPoint slides on my email I'd. I will love to help you in your PowerPoint assignments.
Thanks.
Nanotechnology has applications in combating cancer and reducing pollution, energy use, and greenhouse gas emissions. The NCI Alliance for Nanotechnology in Cancer is working to ensure responsible development of nanotechnologies for cancer treatment and diagnosis. While nanoparticles exist naturally and as byproducts of human activities, their small size raises health and safety concerns that require careful study. The NCI's Nanotechnology Characterization Laboratory evaluates over 125 nanoparticles intended for medical use to better understand their impacts and ensure safety.
ESPP presentation to EU Waste Water Network, 4th June 2024 “EU policies driving nutrient removal and recycling
and the revised UWWTD (Urban Waste Water Treatment Directive)”
hematic appreciation test is a psychological assessment tool used to measure an individual's appreciation and understanding of specific themes or topics. This test helps to evaluate an individual's ability to connect different ideas and concepts within a given theme, as well as their overall comprehension and interpretation skills. The results of the test can provide valuable insights into an individual's cognitive abilities, creativity, and critical thinking skills
Current Ms word generated power point presentation covers major details about the micronuclei test. It's significance and assays to conduct it. It is used to detect the micronuclei formation inside the cells of nearly every multicellular organism. It's formation takes place during chromosomal sepration at metaphase.
When I was asked to give a companion lecture in support of ‘The Philosophy of Science’ (https://shorturl.at/4pUXz) I decided not to walk through the detail of the many methodologies in order of use. Instead, I chose to employ a long standing, and ongoing, scientific development as an exemplar. And so, I chose the ever evolving story of Thermodynamics as a scientific investigation at its best.
Conducted over a period of >200 years, Thermodynamics R&D, and application, benefitted from the highest levels of professionalism, collaboration, and technical thoroughness. New layers of application, methodology, and practice were made possible by the progressive advance of technology. In turn, this has seen measurement and modelling accuracy continually improved at a micro and macro level.
Perhaps most importantly, Thermodynamics rapidly became a primary tool in the advance of applied science/engineering/technology, spanning micro-tech, to aerospace and cosmology. I can think of no better a story to illustrate the breadth of scientific methodologies and applications at their best.
The technology uses reclaimed CO₂ as the dyeing medium in a closed loop process. When pressurized, CO₂ becomes supercritical (SC-CO₂). In this state CO₂ has a very high solvent power, allowing the dye to dissolve easily.
EWOCS-I: The catalog of X-ray sources in Westerlund 1 from the Extended Weste...Sérgio Sacani
Context. With a mass exceeding several 104 M⊙ and a rich and dense population of massive stars, supermassive young star clusters
represent the most massive star-forming environment that is dominated by the feedback from massive stars and gravitational interactions
among stars.
Aims. In this paper we present the Extended Westerlund 1 and 2 Open Clusters Survey (EWOCS) project, which aims to investigate
the influence of the starburst environment on the formation of stars and planets, and on the evolution of both low and high mass stars.
The primary targets of this project are Westerlund 1 and 2, the closest supermassive star clusters to the Sun.
Methods. The project is based primarily on recent observations conducted with the Chandra and JWST observatories. Specifically,
the Chandra survey of Westerlund 1 consists of 36 new ACIS-I observations, nearly co-pointed, for a total exposure time of 1 Msec.
Additionally, we included 8 archival Chandra/ACIS-S observations. This paper presents the resulting catalog of X-ray sources within
and around Westerlund 1. Sources were detected by combining various existing methods, and photon extraction and source validation
were carried out using the ACIS-Extract software.
Results. The EWOCS X-ray catalog comprises 5963 validated sources out of the 9420 initially provided to ACIS-Extract, reaching a
photon flux threshold of approximately 2 × 10−8 photons cm−2
s
−1
. The X-ray sources exhibit a highly concentrated spatial distribution,
with 1075 sources located within the central 1 arcmin. We have successfully detected X-ray emissions from 126 out of the 166 known
massive stars of the cluster, and we have collected over 71 000 photons from the magnetar CXO J164710.20-455217.
The debris of the ‘last major merger’ is dynamically youngSérgio Sacani
The Milky Way’s (MW) inner stellar halo contains an [Fe/H]-rich component with highly eccentric orbits, often referred to as the
‘last major merger.’ Hypotheses for the origin of this component include Gaia-Sausage/Enceladus (GSE), where the progenitor
collided with the MW proto-disc 8–11 Gyr ago, and the Virgo Radial Merger (VRM), where the progenitor collided with the
MW disc within the last 3 Gyr. These two scenarios make different predictions about observable structure in local phase space,
because the morphology of debris depends on how long it has had to phase mix. The recently identified phase-space folds in Gaia
DR3 have positive caustic velocities, making them fundamentally different than the phase-mixed chevrons found in simulations
at late times. Roughly 20 per cent of the stars in the prograde local stellar halo are associated with the observed caustics. Based
on a simple phase-mixing model, the observed number of caustics are consistent with a merger that occurred 1–2 Gyr ago.
We also compare the observed phase-space distribution to FIRE-2 Latte simulations of GSE-like mergers, using a quantitative
measurement of phase mixing (2D causticality). The observed local phase-space distribution best matches the simulated data
1–2 Gyr after collision, and certainly not later than 3 Gyr. This is further evidence that the progenitor of the ‘last major merger’
did not collide with the MW proto-disc at early times, as is thought for the GSE, but instead collided with the MW disc within
the last few Gyr, consistent with the body of work surrounding the VRM.
Remote Sensing and Computational, Evolutionary, Supercomputing, and Intellige...University of Maribor
Slides from talk:
Aleš Zamuda: Remote Sensing and Computational, Evolutionary, Supercomputing, and Intelligent Systems.
11th International Conference on Electrical, Electronics and Computer Engineering (IcETRAN), Niš, 3-6 June 2024
Inter-Society Networking Panel GRSS/MTT-S/CIS Panel Session: Promoting Connection and Cooperation
https://www.etran.rs/2024/en/home-english/
Describing and Interpreting an Immersive Learning Case with the Immersion Cub...Leonel Morgado
Current descriptions of immersive learning cases are often difficult or impossible to compare. This is due to a myriad of different options on what details to include, which aspects are relevant, and on the descriptive approaches employed. Also, these aspects often combine very specific details with more general guidelines or indicate intents and rationales without clarifying their implementation. In this paper we provide a method to describe immersive learning cases that is structured to enable comparisons, yet flexible enough to allow researchers and practitioners to decide which aspects to include. This method leverages a taxonomy that classifies educational aspects at three levels (uses, practices, and strategies) and then utilizes two frameworks, the Immersive Learning Brain and the Immersion Cube, to enable a structured description and interpretation of immersive learning cases. The method is then demonstrated on a published immersive learning case on training for wind turbine maintenance using virtual reality. Applying the method results in a structured artifact, the Immersive Learning Case Sheet, that tags the case with its proximal uses, practices, and strategies, and refines the free text case description to ensure that matching details are included. This contribution is thus a case description method in support of future comparative research of immersive learning cases. We then discuss how the resulting description and interpretation can be leveraged to change immersion learning cases, by enriching them (considering low-effort changes or additions) or innovating (exploring more challenging avenues of transformation). The method holds significant promise to support better-grounded research in immersive learning.
The ability to recreate computational results with minimal effort and actionable metrics provides a solid foundation for scientific research and software development. When people can replicate an analysis at the touch of a button using open-source software, open data, and methods to assess and compare proposals, it significantly eases verification of results, engagement with a diverse range of contributors, and progress. However, we have yet to fully achieve this; there are still many sociotechnical frictions.
Inspired by David Donoho's vision, this talk aims to revisit the three crucial pillars of frictionless reproducibility (data sharing, code sharing, and competitive challenges) with the perspective of deep software variability.
Our observation is that multiple layers — hardware, operating systems, third-party libraries, software versions, input data, compile-time options, and parameters — are subject to variability that exacerbates frictions but is also essential for achieving robust, generalizable results and fostering innovation. I will first review the literature, providing evidence of how the complex variability interactions across these layers affect qualitative and quantitative software properties, thereby complicating the reproduction and replication of scientific studies in various fields.
I will then present some software engineering and AI techniques that can support the strategic exploration of variability spaces. These include the use of abstractions and models (e.g., feature models), sampling strategies (e.g., uniform, random), cost-effective measurements (e.g., incremental build of software configurations), and dimensionality reduction methods (e.g., transfer learning, feature selection, software debloating).
I will finally argue that deep variability is both the problem and solution of frictionless reproducibility, calling the software science community to develop new methods and tools to manage variability and foster reproducibility in software systems.
Exposé invité Journées Nationales du GDR GPL 2024
Unlocking the mysteries of reproduction: Exploring fecundity and gonadosomati...AbdullaAlAsif1
The pygmy halfbeak Dermogenys colletei, is known for its viviparous nature, this presents an intriguing case of relatively low fecundity, raising questions about potential compensatory reproductive strategies employed by this species. Our study delves into the examination of fecundity and the Gonadosomatic Index (GSI) in the Pygmy Halfbeak, D. colletei (Meisner, 2001), an intriguing viviparous fish indigenous to Sarawak, Borneo. We hypothesize that the Pygmy halfbeak, D. colletei, may exhibit unique reproductive adaptations to offset its low fecundity, thus enhancing its survival and fitness. To address this, we conducted a comprehensive study utilizing 28 mature female specimens of D. colletei, carefully measuring fecundity and GSI to shed light on the reproductive adaptations of this species. Our findings reveal that D. colletei indeed exhibits low fecundity, with a mean of 16.76 ± 2.01, and a mean GSI of 12.83 ± 1.27, providing crucial insights into the reproductive mechanisms at play in this species. These results underscore the existence of unique reproductive strategies in D. colletei, enabling its adaptation and persistence in Borneo's diverse aquatic ecosystems, and call for further ecological research to elucidate these mechanisms. This study lends to a better understanding of viviparous fish in Borneo and contributes to the broader field of aquatic ecology, enhancing our knowledge of species adaptations to unique ecological challenges.
Or: Beyond linear.
Abstract: Equivariant neural networks are neural networks that incorporate symmetries. The nonlinear activation functions in these networks result in interesting nonlinear equivariant maps between simple representations, and motivate the key player of this talk: piecewise linear representation theory.
Disclaimer: No one is perfect, so please mind that there might be mistakes and typos.
dtubbenhauer@gmail.com
Corrected slides: dtubbenhauer.com/talks.html
Immersive Learning That Works: Research Grounding and Paths ForwardLeonel Morgado
We will metaverse into the essence of immersive learning, into its three dimensions and conceptual models. This approach encompasses elements from teaching methodologies to social involvement, through organizational concerns and technologies. Challenging the perception of learning as knowledge transfer, we introduce a 'Uses, Practices & Strategies' model operationalized by the 'Immersive Learning Brain' and ‘Immersion Cube’ frameworks. This approach offers a comprehensive guide through the intricacies of immersive educational experiences and spotlighting research frontiers, along the immersion dimensions of system, narrative, and agency. Our discourse extends to stakeholders beyond the academic sphere, addressing the interests of technologists, instructional designers, and policymakers. We span various contexts, from formal education to organizational transformation to the new horizon of an AI-pervasive society. This keynote aims to unite the iLRN community in a collaborative journey towards a future where immersive learning research and practice coalesce, paving the way for innovative educational research and practice landscapes.
Authoring a personal GPT for your research and practice: How we created the Q...Leonel Morgado
Thematic analysis in qualitative research is a time-consuming and systematic task, typically done using teams. Team members must ground their activities on common understandings of the major concepts underlying the thematic analysis, and define criteria for its development. However, conceptual misunderstandings, equivocations, and lack of adherence to criteria are challenges to the quality and speed of this process. Given the distributed and uncertain nature of this process, we wondered if the tasks in thematic analysis could be supported by readily available artificial intelligence chatbots. Our early efforts point to potential benefits: not just saving time in the coding process but better adherence to criteria and grounding, by increasing triangulation between humans and artificial intelligence. This tutorial will provide a description and demonstration of the process we followed, as two academic researchers, to develop a custom ChatGPT to assist with qualitative coding in the thematic data analysis process of immersive learning accounts in a survey of the academic literature: QUAL-E Immersive Learning Thematic Analysis Helper. In the hands-on time, participants will try out QUAL-E and develop their ideas for their own qualitative coding ChatGPT. Participants that have the paid ChatGPT Plus subscription can create a draft of their assistants. The organizers will provide course materials and slide deck that participants will be able to utilize to continue development of their custom GPT. The paid subscription to ChatGPT Plus is not required to participate in this workshop, just for trying out personal GPTs during it.
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The challenges of nanotechnology
• Spectacular promises, benefits for all
• ...but at what price?
– these questions arising in a world in which consumers
are increasingly intolerant to risk
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Definition
• Most widely used definition:
– Nanoscience is the study of phenomena and
manipulation of materials at atomic, molecular and
macromolecular scales, where properties differ
significantly from those at a larger scale.
– Nanotechnologies are the design, characterisation,
production and application of structures, devices and
systems by controlling shape and size at nanometre
scale.
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Millimetre scale (1 m = 1000 mm)
ant and flea
• 5 mm
• 3mm
• 1mm
http://www.nation
alinsectweek.co.u
k/resources/buzz
_ant_06.pdf
www.nanotec.org.uk/report/chapter2.pdf
http://commons.wiki
media.org/wiki/File:D
rosophila_melanogas
ter_-_front_(aka).jpg
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Micrometre scale (1 mm = 1000 µm)
eye of a fruit fly and a red blood cell
• 400 µm
• 8 µm
http://www.molbio1.princeton.edu/facility/confocal/sem/imagelist1.html
www.mta.ca/dmf/blood.htm
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Volume to surface area ratio
• As objects get
smaller they have a
much greater
surface area to
volume ratio
2 cm cube has
a surface area
of 24 cm2
and a
volume of 8 cm3
(ratio = 3:1)
10 cm cube has a
surface area of 600
cm2
and a volume of
1000 cm3
(ratio =
0.6:1)
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Physical properties
• At very small sizes physical properties (magnetic,
electric and optical) of materials can change
dramatically.
http://www.omicron.de/index2.html?/re
sults/spin_polarized_tunneling_induce
d_luminescence_microcopy_sp_tilm/in
dex.html~Omicron
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Why is there so much interest/concern about
nanotechnology?
• Enormous potential
• Huge gaps in knowledge concerning the possible
risks
• Difficulty in detecting and removing
• Absence of regulation
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Potentials risks associated with nanotechnology
• Adverse health effects in humans from deliberate or
accidental exposure
• Adverse effects on the environment from deliberate or
accidental exposure
• Potentially explosive properties of nanostructures
• “Grey goo”
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Risk assessment problems
• Very difficult to detect without sophisticated equipment
• Difficult to predict how particles will behave in the environment
(dispersed/clumped)
• Small size may result in particles passing into the body more easily
(inhalation, ingestion, absorption)
• May be more reactive due to surface area to volume ratio
• Potential to adsorb toxic chemicals
• Persistence - Longevity of particles in the environment and body are
unknown
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Toxicological difficulties
• All structures are likely to have a unique
toxicological profile
• Standardised terminology agreed recently
• Particle size may be less important than the
surface characteristics of the material
• Standard dose-response tests may not be
appropriate
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Carbon Nanotubes
• Commercially produced by companies such as
Thomas Swan
• Desirable product
http://www.tennis.com/yo
urgame/gear/racquets/bab
olat/babolat.aspx?
id=56932
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Potential applications of carbon nanotubes
Materials & Chemistry
- Ceramic and metallic CNT composites
- Polymer CNT composites (heat
conducting polymers)
- Coatings (e.g. conductive surfaces)
- Membranes and catalysis
- Tips of Scanning Probe Microscopes
(SPM)
Medicine & Life Science
- Medical diagnosis (e.g. Lab on a Chip
(LOC))
- Medical applications (e.g. drug delivery)
- Chemical sensors
- Filters for water and food treatment
Electronics & ICT
- Lighting elements, CNT based field
emission displays
- Microelectronic: Single electron transistor
- Molecular computing and data storage
- Ultra-sensitive electromechanical sensors
- Micro-Electro-Mechanical Systems
(MEMS)
Energy
- Hydrogen storage, energy storage (super
capacitors)
- Solar cells
- Fuel cells
- Superconductive materials
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Carbon nanotubes
• Have raised concerns due to a superficial
likeness to asbestos fibres and extreme durability
• Potential exposures during manufacturing,
processing, product use and disposal
• Have been researched more than most
manufactured nanostructures
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CNT Research
• Results have been variable dependent on dose, testing model, purity and
type of nanostructure
• Research results to date:
– Some coated CNTs appear to move freely throughout the body (mice) whereas
others are rapidly excreted
– Installation experiments have shown inflammatory, fibrotic and immune changes
– Inhalation experiments have shown small changes in the lung
– Effects on the immune system
– Effects on cell growth and death
– Modification of tube coating by aquatic organisms
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IOM HARN Report
• Funded by Defra
• Objective – "to undertake a scoping
study to review the existing literature
on industrial fibres and HARN to
determine whether high aspect ratio
nanoparticles (HARN) should raise the
same concerns as do asbestos fibres"
• "This review has identified many
similarities between HARN and
asbestos with regard to their physico-
chemical properties and toxicological
effects and has concluded that there is
sufficient evidence to suggest that
HARN which have the same
characteristics (diameter, length and
biopersitence) as pathogenic fibres are
likely to have similar pathology.
This review has also highlighted the
lack of data in key areas of toxicology,
exposure and assessment."
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Regulation
• New generic nanotechnology regulations would be difficult to devise.
• More likely that current regulations/legislation will be adapted to take
account of developments at the nanoscale.
• Review by the European Commission* on the regulatory aspects of
nanotechnology : chemicals (REACH), worker protection (e.g.
Directive 89/391/EEC), products (e.g. General Product Safety
Directive), environmental protection (e.g. Directive 2006/12/EC on
waste)
• "Current legislation covers in principle the potential health, safety and
environmental risks in relation to nanomaterials ...."
*Regulatory Aspects of Nanomaterials – Communication from the European Commission 2008
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REACH
• Regulation (EC) No 1907/2006 of the European Parliament and of the
Council on the Registration, Evaluation, Authorisation and Restriction of
Chemicals
• "REACH is based on the principle that manufacturers, importers and
downstream users have to ensure that they manufacture, place on the
market or use such substances that do not adversely affect human health or
the environment."
• Places an obligation on importers/manufacturers to produce a registration
dossier for any substance that is imported/manufactured in a quantity greater
than 1 tonne (>10 tonnes – chemical safety report)
• Commission report states "There are no provisions in REACH referring
explicitly to nanomaterials. However, nanomaterials are covered by the
“substance” definition in REACH."
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REACH and nanomaterials
• Registration document will need to be updated if a
nanoversion of a material is introduced
– however novel nanomaterials may not reach the weight threshold
for notification
• Current testing guidelines may need to be modified – in
the interim testing should be carried out according to
existing guidelines
• Substances of high concern require special authorisation
– effects of most nanomaterials are unknown
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October 2008
• Amendment (Commission Regulation (EC) No 987/2008)
concerning the removal of carbon and graphite from lists
of exempt materials:
• "The review carried out by the Commission pursuant to
Article 138(4) has revealed that three substances listed in
Annex IV should be removed from that Annex, as
insufficient information is known about these substances
for them to be considered as causing minimum risk
because of their intrinsic properties ... This is also the
case with carbon and graphite, in particular due to the
fact that the concerned Einecs and/or CAS numbers are
used to identify forms of carbon or graphite at the nano-
scale, which do not meet the criteria for inclusion in this
Annex."
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Nanotechnology and product liability
1. New technology and the concept of "defect"
2. Development risks
• what is "discoverable"?
• emerging knowledge and the benefit of hindsight
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Nanotechnology and product liability
• Regulatory intervention and regulatory
compliance
• Implications of REACH-style regulation
• Relative responsibilities
• innovators
• other suppliers
• regulators
• Duties to research/test/investigate/inquire
Editor's Notes
The Royal Society & The Royal Academy of Engineering - Nanoscience and nanotechnologies July 2004]
The Royal Society & The Royal Academy of Engineering - Nanoscience and nanotechnologies July 2004]
The Royal Society & The Royal Academy of Engineering - Nanoscience and nanotechnologies July 2004]
The Royal Society & The Royal Academy of Engineering - Nanoscience and nanotechnologies July 2004]
Royal Society Engineering
Each component of the compound eye is about 10 um in diameter which is equivalent to 10,000 nm in diameter
(a) Adenovirus. (b) Rotavirus.
Caption: Micrograph of pyramid-shaped quantum dots grown from indium, gallium, and arsenic.Each dot is about 20 nanometers wide and 8 nanometers in height.
Quantum Confinement between Self-Organized Pt Nanowires on Ge(001)(Result of the month 10/2005)
The existence of one-dimensional (1D) electronic states between self-organised Pt nanowires spaced 1.6 or 2.4 nm apart on a Ge(001) surface is revealed by low-temperature scanning tunneling microscopy. These perfectly straight Pt nanowires act as barriers for a surface state (located just below the Fermi level) of the underlying terrace. The energy positions of the 1D electronic states are in good agreement with the energy levels of a quantum particle in a well. Spatial maps of the differential conductivity of the 1D electronic states conclusively reveal that these states are exclusively present in the troughs between the Pt nanowires.
During 2008 there were several high profile research publications linking CNTs with pathological changes similar to those seen following exposure to asbestos. These publications suggested a strong possibility that some CNTs may have the potential to cause similar effects to asbestos. This possibility was being investigated by the IOM in association with ? who last month published their report on high aspect ratio nanoparticles (HARN).
Current legislation or associated guidance and technical documents may need to be update/amended in order to be effective in relation to nanomaterials
However, many of the properties of nanomaterials are unknown.
The Royal Society & The Royal Academy of Engineering - Nanoscience and nanotechnologies July 2004]
The Royal Society & The Royal Academy of Engineering - Nanoscience and nanotechnologies July 2004]