BUCKY BALL
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Buckminsterfullerene (C60) is the smallest fullerene molecule that resembles a soccer ball, with carbon atoms at the corners of hexagons and bonds along the edges. It is about 1 nanometer in diameter and is the most common fullerene found in soot. C60 has potential medical and industrial applications. Carbon nanotubes are incredibly strong and flexible cylindrical molecules that could be used in nanotechnology. An egg-shaped fullerene molecule has also been discovered that contains a molecule of triterbium nitride inside.
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![Bucky Ball
Buckminsterfullerene (IUPAC name (C60-
Ih)[5,6]fullerene) is the smallest fullerene in
which no two pentagons share an edge. It is
also the most common in terms of natural
occurrence, as it can often be found in soot.
The structure of C60 is a truncated T=3
icosahedron, which resembles a soccer ball
of the type made of hexagons and
pentagons, with a carbon atom at the
corners of each hexagon and a bond along
each edge.
The diameter of a C60 molecule is about 1
nanometer (nm).
From AIDS medicines to superconductors to
flat-screen TVs, a wide range of medical
and industrial uses are envisioned for the
buckminsterfullerene, an incredibly strong
soccer-ball-shaped molecule that is the third
form of carbon after diamond and graphite.
http://en.wikipedia.org/wiki/Buckyball
•http://www.godunov.com/Bucky/fullerene.htm
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Sumio Iijima is credited with discovering carbon nanotubes in 1991. Carbon nanotubes are cylindrical structures made of carbon atoms that are many times longer than their diameter. They exist as single-walled nanotubes or multi-walled nanotubes. Carbon nanotubes have extraordinary strength and unique electrical properties that make them promising for many applications.
97 2003 carbon nanotubes
Sumio Iijima is credited with discovering carbon nanotubes in 1991. Carbon nanotubes are cylindrical structures made of carbon atoms that are many times longer than their diameter. They exist as single-walled nanotubes or multi-walled nanotubes. Carbon nanotubes have extraordinary strength and unique electrical properties that make them promising for many applications.
97 2003 carbon nanotubes
Sumio Iijima is credited with discovering carbon nanotubes in 1991. Carbon nanotubes are cylindrical structures made of carbon atoms that have unique mechanical and electrical properties. There are two main types: single-walled nanotubes and multi-walled nanotubes. Carbon nanotubes have a variety of potential applications due to their extraordinary strength, thermal conductivity, and other properties.
Carbon nanomaterials for transport
Carbon nanotubes have important implications for transport due to their fascinating electrical, thermal, and mechanical properties. They can conduct electricity better than copper and transmit heat better than diamond. Applications of carbon nanotubes in transport include use in aircraft and vehicle bodies, brakes, windscreens, and tires. Issues remain around efficiently dispersing and bonding nanotubes in materials to maximize their properties, but research continues to advance applications in automotive and aerospace components. Looking ahead, vehicles may one day help produce valuable carbon nanomaterials while reducing emissions.
Nanotechnology-unit 1.ppt
Nanotechnology notes for the preparation with definition and scope along with history and application in various sectors like security
Anthony crasto buckyball
The discovery of buckminsterfullerene (C60) in 1985 was an unexpected finding that generated significant interest. In experiments at Rice University in 1985, laser vaporization of graphite produced a strong peak for a carbon cluster with 60 atoms. The researchers concluded this extremely stable cluster was likely a hollow, spherical molecule. Inspired by geodesic dome designs of Buckminster Fuller, they proposed the cluster had the structure of a soccer ball formed from 20 hexagons and 12 pentagons. This buckminsterfullerene molecule, nicknamed "buckyball," launched interest in a new class of carbon structures called fullerenes. In 1990, a method was developed to produce buckyballs in gram quantities, enabling extensive study and applications
seminar report for carbon nanotubes
consists literature review, classification,synthesis methods, properties, advantages and limitations, applications,etc
Nano tubes Modern Technology
This document discusses carbon nanotubes and boron nanotubes. It provides details on their production methods, properties such as strength and electrical conductivity, applications, and potential health hazards. Carbon nanotubes are allotropes of carbon that exhibit extraordinary strength and unique electrical properties. They can be produced through arc discharge, laser ablation, and chemical vapor deposition. Boron nanotubes are anticipated to exist based on their similarity to carbon nanotubes, but have not been fully characterized. The document outlines some of their potential sorption properties.
Carbon nanotubes
The document discusses carbon nanotubes, including their discovery in 1991 by Sumio Iijima, their unique tubular structure made of rolled graphene sheets, and their extraordinary mechanical and electrical properties which make them useful for many applications. Carbon nanotubes exist as either single-walled or multi-walled structures and have a variety of properties depending on their exact structure, including being metallic or semiconducting conductors. Their small size but high strength and flexibility make them promising for applications in electronics, optics, and other nanotechnology fields.
carbon nanotubes
Carbon nanotubes are cylindrical carbon molecules that exhibit extraordinary strength and unique electrical properties. They can be produced through arc discharge, laser ablation, and chemical vapor decomposition. Carbon nanotubes have the highest tensile strength and modulus of elasticity of any known material. They are also very good conductors of heat and electricity. Potential applications of carbon nanotubes include building elevators into space, creating novel transistors smaller than conventional ones, and representing quantum bits for quantum computing. However, carbon nanotubes may pose health risks if inhaled in small sizes similar to asbestos fibers.
Seminar report on Carbon Nanotubes
Carbon nanotubes have extraordinary strength and unique electrical properties. They are classified as single-walled or multi-walled nanotubes. Common synthesis methods are arc discharge, laser ablation, and chemical vapor deposition. Key milestones include the discovery of 18.5 cm long nanotubes and the thinnest freestanding single-walled nanotube of about 4.3 Angstroms in diameter. Carbon nanotubes have immense strength, are harder than diamond, and are excellent thermal and electrical conductors.
OFFICIAL Pre-Masters Anderson Amaral
This document discusses quantum dots and quantum wires. It begins by providing a brief history of quantum dots, discovered in 1981 and coined in 1985. It describes their characteristics as semiconductor nanoparticles 1-100 atoms in diameter that exhibit quantum confinement. Applications include transistors, solar cells, LEDs and lasers. Health concerns relate to toxicity from cadmium. Quantum wires are nanowires that exhibit quantum effects, quantizing transverse energy. They may be used to link tiny circuit components. Various materials can be used including metals, semiconductors and insulators. Properties result from reducing dimensionality from quantum wells to wires to dots, decreasing degrees of freedom until full three-dimensional confinement in dots.
Similar to BUCKY BALL (20)
Nanobiotechnology introduction and role in biotechnology.pdf
Nanobiotechnology introduction and role in biotechnology.pdf
More from Vřáj Pàtêl
PREJUDICE AND DISCRIMINATION
Prejudice refers to preconceived, usually unfavorable judgments toward people or groups based on characteristics such as gender, race, religion or nationality. Early psychological research in the 1920s viewed prejudice as natural and sought to prove white supremacy, but perspectives changed in the 1930s-1940s with concerns about anti-Semitism. Prejudice and discrimination can occur on the basis of race, gender, social class, religion, age, language, nationality, species and other attributes, and controversies often arise regarding topics like nationalism, racism, classism and multiculturalism.
cultural heritage of INDIA
Indian architecture spans over 4,500 years, from the Indus Valley civilization to modern times. Key developments include ancient town planning in Harappa and Mohenjo-Daro, Buddhist architecture under Ashoka in the 3rd century BCE such as at Sanchi, southern Hindu temples beginning in the 8th century at places like Mahabalipuram, the ornate 10th century Chandella temples at Khajuraho, cave temples during the Rashtrakuta dynasty at Ellora and Ajanta between the 8th-10th centuries, and the iconic Mughal architecture such as the Taj Mahal. Indian architecture reflects the diversity of Indian culture, evolving over centuries through various invading influences.
Hydrocarbons
Hydrocarbons contain only hydrogen and carbon. They are divided into homologous series with general formulas that make the compounds chemically similar. The main homologous series are alkanes, alkenes, and cycloalkanes. Alkanes have the general formula CnH2n+2 and include gases, liquids, and waxy solids like methane, ethane, propane, butane, and larger hydrocarbons. Alkenes have the general formula CnH2n and all must have a C=C double bond. Cycloalkanes have the same general formula as alkenes, CnH2n, but are saturated rings rather than unsaturated. Crude oil is cracked
Coalpetroleum
Coal and petroleum are non-renewable sources of energy that were formed from ancient plant and animal remains over millions of years. Coal is a combustible rock formed from fossilized vegetation and is mined through surface or underground methods. Petroleum is a flammable liquid found beneath the earth's surface that was produced from the remains of sea creatures. Both coal and petroleum are used as fuel sources but their extraction and use also poses environmental risks like pollution and oil spills.
architectural heritage of india
Indian architecture spans over 4,500 years, from the Indus Valley civilization to modern times. Key architectural styles developed with the advent of Buddhism under Ashoka in the 3rd century BCE. Southern Hindu architecture flourished beginning in the 8th century CE, while the Chandellas built ornate temples at Khajuraho from 950-1030 CE. The Mughals greatly invested in monumental architecture, most famously the Taj Mahal. Indian architecture reflects the diversity of Indian culture, evolving over centuries through various invading influences.
Nanotechnolgy
This document provides an overview of nanotechnology, including definitions, history, tools and techniques, materials, applications, and future possibilities. Nanotechnology involves manipulating matter at the atomic or molecular scale (1-100 nanometers) and includes carbon nanotubes, nanorods, and potential future nanobots. It has a wide range of applications from drugs and fabrics to electronics, computers, and beyond. While nanotechnology promises benefits, potential pitfalls include health risks from nano-particles and potential military or replicating threats.
Nano science _technology
Matter and energy exist in various forms and interact in many ways. Nano materials are materials that have at least one dimension sized between 1 to 100 nanometers. They exhibit different properties than bulk materials due to greater surface area to volume ratio and quantum effects. Nanotechnology involves designing and engineering structures at the nanoscale to utilize these size-dependent properties. Nano materials find applications in industries such as electronics, energy, medicine, and more.
Air
The document discusses air and its composition, properties, and usefulness. It notes that air is a mixture of gases that forms the atmosphere surrounding Earth. Air has properties that make it useful, such as supporting plant and animal life. However, the document also mentions that air pollution from sources like vehicles and factories is a problem, as it can negatively impact both human and environmental health. In summary, the document outlines what air is, how it is useful, and some of the issues with air pollution.
ROBOTICS
George Charles Devol was an American inventor who was awarded the first patent for an industrial robot called Unimate in 1954. He coined the term "robot" and helped establish the first robotics company, Unimation. The first industrial robot revolutionized manufacturing by taking over dangerous and repetitive tasks from human workers. Since then, robots have been developed to perform a wide range of manual labor across industries like manufacturing, space exploration, healthcare, and more.
water and agriculture
Water is essential for all life on Earth but only fresh water from rivers, lakes, and rain is suitable for drinking and agriculture. Agriculture relies heavily on water, with irrigation being the most important use of fresh water in farming. Other key human uses of water include drinking, washing, fire extinguishing, and industrial applications like power generation. In India, agriculture is the main occupation and livelihood for 70% of the population, who depend on irrigation from tube wells, tanks, canals, and dams, as well as rainwater. The two main types of crops grown are food crops and cash crops.
Mineral wealth of india
Minerals are inorganic, naturally occurring substances found in rocks, dirt, and water. They are classified as metallic or non-metallic minerals. Examples of metallic minerals given are iron and gold. Iron is the most commonly used metal and is used to build structures and make magnets. Gold is a precious metal used to make ornaments. Non-metallic minerals described include coal and petroleum. Coal is a fossil fuel that can be burned for energy. Petroleum, also known as crude oil, occurs underground and can be refined into fuel, wax and other products.
Communication
Modern means of communication include the postal system, telephone, fax, computer, newspaper, radio, television, and satellite. The Indian postal system has over 1.5 million post offices. The telephone was invented by Alexander Graham Bell and allows people to talk across long distances. Fax machines scan printed documents and transmit them over telephone lines. Computers can be programmed to solve various problems. Newspapers and magazines provide daily information to mass audiences, while radio and television also communicate news and entertainment via audio and visual broadcasts. Satellites help enable international calls and live broadcasts by transmitting signals from space.
Constitution of india
The document provides an overview of the key concepts in the Constitution of India, including:
1) It defines what a constitution is - the set of rules and laws that determine the form of government and the relationship between citizens and the government.
2) It describes the framing of the Indian Constitution, including that Dr. Rajendra Prasad became the President of the Constituent Assembly and Dr. Bhimrao Ambedkar became the Chairman of its drafting committee in 1946.
3) The Preamble to the Indian Constitution sets out its guiding principles and purpose.
More from Vřáj Pàtêl (13)
Recently uploaded
Unlocking the mysteries of reproduction: Exploring fecundity and gonadosomati...
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.
Compexometric titration/Chelatorphy titration/chelating titration
Classification
Metal ion ion indicators
Masking and demasking reagents
Estimation of Magnisium sulphate
Calcium gluconate
Complexometric Titration/ chelatometry titration/chelating titration, introduction, Types-
1.Direct Titration
2.Back Titration
3.Replacement Titration
4.Indirect Titration
Masking agent, Demasking agents
formation of complex
comparition between masking and demasking agents,
Indicators/Metal ion indicators/ Metallochromic indicators/pM indicators,
Visual Technique,PM indicators (metallochromic), Indicators of pH, Redox Indicators
Instrumental Techniques-Photometry
Potentiometry
Miscellaneous methods.
Complex titration with EDTA.
Applied Science: Thermodynamics, Laws & Methodology.pdf
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.
Remote Sensing and Computational, Evolutionary, Supercomputing, and Intellige...
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/在线办理(salfor毕业证书)索尔福德大学毕业证毕业完成信一模一样
学校原件一模一样【微信：741003700 】《(salfor毕业证书)索尔福德大学毕业证》【微信：741003700 】学位证，留信认证（真实可查，永久存档）原件一模一样纸张工艺/offer、雅思、外壳等材料/诚信可靠,可直接看成品样本，帮您解决无法毕业带来的各种难题！外壳，原版制作，诚信可靠，可直接看成品样本。行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备。十五年致力于帮助留学生解决难题，包您满意。
本公司拥有海外各大学样板无数，能完美还原。
1:1完美还原海外各大学毕业材料上的工艺：水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠。文字图案浮雕、激光镭射、紫外荧光、温感、复印防伪等防伪工艺。材料咨询办理、认证咨询办理请加学历顾问Q/微741003700
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留信网认证的作用:
1:该专业认证可证明留学生真实身份
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
7:个人信誉贷款加10分
8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才
The binding of cosmological structures by massless topological defects
Assuming spherical symmetry and weak field, it is shown that if one solves the Poisson equation or the Einstein field
equations sourced by a topological defect, i.e. a singularity of a very specific form, the result is a localized gravitational
field capable of driving flat rotation (i.e. Keplerian circular orbits at a constant speed for all radii) of test masses on a thin
spherical shell without any underlying mass. Moreover, a large-scale structure which exploits this solution by assembling
concentrically a number of such topological defects can establish a flat stellar or galactic rotation curve, and can also deflect
light in the same manner as an equipotential (isothermal) sphere. Thus, the need for dark matter or modified gravity theory is
mitigated, at least in part.
Phenomics assisted breeding in crop improvement
As the population is increasing and will reach about 9 billion upto 2050. Also due to climate change, it is difficult to meet the food requirement of such a large population. Facing the challenges presented by resource shortages, climate
change, and increasing global population, crop yield and quality need to be improved in a sustainable way over the coming decades. Genetic improvement by breeding is the best way to increase crop productivity. With the rapid progression of functional
genomics, an increasing number of crop genomes have been sequenced and dozens of genes influencing key agronomic traits have been identified. However, current genome sequence information has not been adequately exploited for understanding
the complex characteristics of multiple gene, owing to a lack of crop phenotypic data. Efficient, automatic, and accurate technologies and platforms that can capture phenotypic data that can
be linked to genomics information for crop improvement at all growth stages have become as important as genotyping. Thus,
high-throughput phenotyping has become the major bottleneck restricting crop breeding. Plant phenomics has been defined as the high-throughput, accurate acquisition and analysis of multi-dimensional phenotypes
during crop growing stages at the organism level, including the cell, tissue, organ, individual plant, plot, and field levels. With the rapid development of novel sensors, imaging technology,
and analysis methods, numerous infrastructure platforms have been developed for phenotyping.
Bob Reedy - Nitrate in Texas Groundwater.pdf
Presented at June 6-7 Texas Alliance of Groundwater Districts Business Meeting
ESR spectroscopy in liquid food and beverages.pptx
With increasing population, people need to rely on packaged food stuffs. Packaging of food materials requires the preservation of food. There are various methods for the treatment of food to preserve them and irradiation treatment of food is one of them. It is the most common and the most harmless method for the food preservation as it does not alter the necessary micronutrients of food materials. Although irradiated food doesn’t cause any harm to the human health but still the quality assessment of food is required to provide consumers with necessary information about the food. ESR spectroscopy is the most sophisticated way to investigate the quality of the food and the free radicals induced during the processing of the food. ESR spin trapping technique is useful for the detection of highly unstable radicals in the food. The antioxidant capability of liquid food and beverages in mainly performed by spin trapping technique.
Cytokines and their role in immune regulation.pptx
This presentation covers the content and information on "Cytokines " and their role in immune regulation .
Deep Software Variability and Frictionless Reproducibility
Deep Software Variability and Frictionless ReproducibilityUniversity of Rennes, INSA Rennes, Inria/IRISA, CNRS
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
THEMATIC APPERCEPTION TEST(TAT) cognitive abilities, creativity, and critic...
THEMATIC APPERCEPTION TEST(TAT) cognitive abilities, creativity, and critic...Abdul Wali Khan University Mardan,kP,Pakistan
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 skillsbordetella pertussis.................................ppt
Bordettela is a gram negative cocobacilli spread by air born drop let
Micronuclei test.M.sc.zoology.fisheries.
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.
8.Isolation of pure cultures and preservation of cultures.pdf
Isolation of pure culture, its various method.
原版制作(carleton毕业证书)卡尔顿大学毕业证硕士文凭原版一模一样
原版纸张【微信：741003700 】【(carleton毕业证书)卡尔顿大学毕业证】【微信：741003700 】学位证，留信认证（真实可查，永久存档）offer、雅思、外壳等材料/诚信可靠,可直接看成品样本，帮您解决无法毕业带来的各种难题！外壳，原版制作，诚信可靠，可直接看成品样本。行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备。十五年致力于帮助留学生解决难题，包您满意。
本公司拥有海外各大学样板无数，能完美还原海外各大学 Bachelor Diploma degree, Master Degree Diploma
1:1完美还原海外各大学毕业材料上的工艺：水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠。文字图案浮雕、激光镭射、紫外荧光、温感、复印防伪等防伪工艺。材料咨询办理、认证咨询办理请加学历顾问Q/微741003700
留信网认证的作用:
1:该专业认证可证明留学生真实身份
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
7:个人信誉贷款加10分
8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才
EWOCS-I: The catalog of X-ray sources in Westerlund 1 from the Extended Weste...
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.
Recently uploaded (20)
Unlocking the mysteries of reproduction: Exploring fecundity and gonadosomati...
Unlocking the mysteries of reproduction: Exploring fecundity and gonadosomati...
Compexometric titration/Chelatorphy titration/chelating titration
Compexometric titration/Chelatorphy titration/chelating titration
Basics of crystallography, crystal systems, classes and different forms
Basics of crystallography, crystal systems, classes and different forms
Applied Science: Thermodynamics, Laws & Methodology.pdf
Applied Science: Thermodynamics, Laws & Methodology.pdf
Remote Sensing and Computational, Evolutionary, Supercomputing, and Intellige...
Remote Sensing and Computational, Evolutionary, Supercomputing, and Intellige...
The binding of cosmological structures by massless topological defects
The binding of cosmological structures by massless topological defects
aziz sancar nobel prize winner: from mardin to nobel
aziz sancar nobel prize winner: from mardin to nobel
ESR spectroscopy in liquid food and beverages.pptx
ESR spectroscopy in liquid food and beverages.pptx
Cytokines and their role in immune regulation.pptx
Cytokines and their role in immune regulation.pptx
Deep Software Variability and Frictionless Reproducibility
Deep Software Variability and Frictionless Reproducibility
THEMATIC APPERCEPTION TEST(TAT) cognitive abilities, creativity, and critic...
THEMATIC APPERCEPTION TEST(TAT) cognitive abilities, creativity, and critic...
bordetella pertussis.................................ppt
bordetella pertussis.................................ppt
8.Isolation of pure cultures and preservation of cultures.pdf
8.Isolation of pure cultures and preservation of cultures.pdf
EWOCS-I: The catalog of X-ray sources in Westerlund 1 from the Extended Weste...
EWOCS-I: The catalog of X-ray sources in Westerlund 1 from the Extended Weste...
BUCKY BALL
- 1. Bucky Ball Buckminsterfullerene (IUPAC name (C60- Ih)[5,6]fullerene) is the smallest fullerene in which no two pentagons share an edge. It is also the most common in terms of natural occurrence, as it can often be found in soot. The structure of C60 is a truncated T=3 icosahedron, which resembles a soccer ball of the type made of hexagons and pentagons, with a carbon atom at the corners of each hexagon and a bond along each edge. The diameter of a C60 molecule is about 1 nanometer (nm). From AIDS medicines to superconductors to flat-screen TVs, a wide range of medical and industrial uses are envisioned for the buckminsterfullerene, an incredibly strong soccer-ball-shaped molecule that is the third form of carbon after diamond and graphite. http://en.wikipedia.org/wiki/Buckyball •http://www.godunov.com/Bucky/fullerene.htm l
- 2. Bucky Tube The strength and flexibility of carbon nanotubes makes them of potential use in controlling other nanoscale structures, which suggests they will have an important role in nanotechnology engineering. The highest tensile strength an individual multi-walled carbon nanotube has been tested to be is 63 GPa. Carbon nanotubes have already been used as composite fibers in polymers to improve the mechanical, thermal and electrical properties of the bulk product. http://en.wikipedia.org/wiki/Carbon_nanotube
- 3. Bucky Egg An egg-shaped fullerene, or "buckyball egg" has been made and characterized by chemists at UC Davis, Virginia Tech and Emory and Henry College, Va. The unexpected discovery opens new possibilities for structures for fullerenes, which could have a wide range of uses. Beavers started to map out the structure, she found two pentagons next to each other, making the pointy end of the egg. Initially she thought that the results were a mistake, but she showed the data to Marilyn Olmstead, an expert on X-ray crystallography, and they decided that the results were real. The egg contains a molecule of triterbium nitride inside. •http://www.news.ucdavis.edu/search/news