Samarium hexaboride both conductor and insulator
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A research team from the University of Cambridge discovered that samarium hexaboride has unique electrical properties. It acts as both a conductor and insulator depending on temperature - the surface is conductive like a metal at low temperatures, while the interior is insulating. This challenges traditional understandings of materials as either purely metallic conductors or insulating insulators. The research, led by Professor Suchitra Sebastian, found samarium hexaboride is a good room temperature conductor that becomes a topological insulator with a complex, special electron interaction in its interior at low temperatures.
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- The learning objectives are to understand materials structure-property relationships and apply concepts to materials synthesis and different applications areas like nanomaterials.
Arc discharge method
This document describes the arc discharge method for synthesizing nanomaterials. It discusses how an arc discharge works by thermionic emission to vaporize electrode materials and form a plasma. The document provides details on the experimental setup, conditions for producing single-walled carbon nanotubes, and applications of the arc discharge method such as synthesizing carbon nanotubes, metal nanoparticles, and nanowires.
Metals, semiconductors and semiconductors
The document discusses the properties of metals and their crystalline structure. It begins by explaining that metals have a closely packed crystalline structure, usually face centered cubic, body centered cubic, or hexagonal close packed. This gives metals their high conductivity of heat and electricity as well as their malleability, ductility, and high melting and boiling points. Metals also have metallic luster and can emit electrons through thermionic or photoemissive processes due to their mobile electrons.
ORTHODONTICS wires 1
The document discusses the evolution of materials used in orthodontics from early materials like gold and brass to modern superelastic nickel-titanium alloys. It describes the basic properties of materials including their atomic structure, crystalline structure, and how properties like strength and ductility can be modified through processes like cold working and annealing. The ideal properties for orthodontic archwires are also discussed.
Solids state of matter
Solids are rigid substances that have a definite shape and volume. In solids, atoms, ions, and molecules are held tightly together by strong bonds, causing solids to lack the ability to flow. There are two main types of solids - crystalline and amorphous. Crystalline solids have a regular repeating pattern of atoms and sharp melting points, while amorphous solids lack this organized structure. The positions of particles in a crystalline solid form a crystal lattice defined by a repeating unit cell. Methods like X-ray crystallography use the diffraction pattern of X-rays hitting the crystal structure to determine atomic positions.
Iron – carbon phase diagram
The document discusses atomic structure and how it relates to the properties and applications of engineering materials. It explains that atomic structure determines bonding types, which then affect material properties like strength, conductivity, and ductility. The document discusses different bonding structures like metallic, ionic, and covalent bonding, and how they influence material properties. It then gives examples of materials that exhibit different bonding types and properties.
Similar to Samarium hexaboride both conductor and insulator (20)
Study of Boron Based Superconductivity and Effect of High Temperature Cuprate...
Study of Boron Based Superconductivity and Effect of High Temperature Cuprate...
More from Richard Castle
Products presentation Rare Earths Minor Metals Chemical Compounds Sputtering ...
Zegen Metals&Chemical Limited
Product Presentation Including Rare Earths, Minor Metals, Chemical Compounds and Sputtering Targets
MSDS Silvery White Liquid Mercury Hg
This document provides a safety data sheet for mercury. Mercury is classified as highly toxic if inhaled and may damage fertility or harm the unborn child through prolonged or repeated exposure. It is also very toxic to aquatic life with long lasting effects. Personal protective equipment including respiratory protection is required when handling mercury. In the event of accidental release, personnel should evacuate and only trained responders using proper protective equipment should approach the area.
Catalog 201804 Zegen Metals&Chemicals Limited
Company Presentation and Product Catalog Update On April, 2018
Zegen Metals&Chemicals Limited
Rare Earths, Minor Metals, Alloys, Derivates, Chemical Compounds, Sputtering Target
New car battery developed by lg chem
LG Chem has developed a new lithium-ion battery pack for electric vehicles that can provide a cruising range of up to 300 miles, surpassing Tesla's current battery technology. The battery pack has a capacity between 80-120 kWh, higher than Tesla's 85 kWh battery. LG Chem has supplied battery technology to many electric vehicles from various automakers and their new battery is expected to be used in the 2017 Chevy Bolt, Audi Q6 E-Tron, and Porsche models.
Germanene
A European research group developed germanene, a single layer of germanium atoms that may have applications in electronics. It was reported in the New Journal of Physics in September 2014. Researchers had previously tried to synthesize germanene by depositing germanium onto silver substrates, but this failed. They were able to synthesize it by depositing germanium onto platinum substrates. Analysis and modeling confirmed the material's structure and properties. Researchers believe germanene grown on gold film substrates may enable larger scale production due to lower cost and its potential for quantum computing applications at room temperature.
New conductive ink print circuit in clothes
A new conductive ink allows circuits to be printed directly onto clothes without damaging them. The ink is made of fluorine, organic solvents, and silver pieces, allowing it to be flexible and durable even when stretched to three times its original length. This ink enables circuits to be integrated into fabrics and withstand stresses without breaking.
Supercapacitor of high performance, flexible
Researchers at MIT have developed a new type of flexible supercapacitor made from niobium nanowires that could be well-suited for wearable devices. The supercapacitor has a high power density of 55W/cc, which is 3.5 times greater than supercapacitors made from carbon nanotubes. It is also small in size and does not require a metal support structure. While still in the experimental stage, the researchers believe this supercapacitor can be mass produced and is made from abundant, low-cost materials.
Dielectric elastomers newly used in artificial joint
Zegen Metals&Chemicals Limited is a company located in Hongjian Building 5028, Cai’e North Road, Kaifu District, Changsha, China. Their website is http://www.zegmetal.com and their phone number is 0086 189 7490 5158. A new research report found that dielectric elastomers, a soft and lightweight material, can be used in artificial joints and commit bending of negative angles, flapping like bird wings. This material has potential applications in soft robotics and energy efficient robots.
Energy storage systems comparison
Zegen Metals&Chemicals Limited provides a comparison of various energy storage systems, including hydrogen fuel cells, aluminum air batteries, flow batteries, and graphene batteries. Hydrogen fuel cells have advantages but producing, storing, and transporting hydrogen poses real challenges. Aluminum air batteries have high energy density but low power density and issues with aluminum's chemical properties. Flow batteries have higher energy density than traditional batteries but still low densities that limit their use to energy storage stations rather than vehicles. Graphene batteries can charge and discharge fast but have short lifespans in experiments so far.
Energy storage systems comparison
Zegen Metals&Chemicals Limited provides a comparison of 4 energy storage systems:
1) Hydrogen fuel cells have advantages of being environmentally friendly but challenges in hydrogen production, storage, transportation due to its high pressure and low temperature requirements.
2) Aluminum air batteries have high energy density but low power density, and challenges in guaranteeing safe and stable performance of aluminum.
3) Flow batteries have higher energy density than normal chemical cells but still have low energy density limiting their use to energy storage stations not vehicles. Recent research increased electrolyte density but is still experimental.
4) Graphene batteries can increase capacity but in experiments provide only short battery life despite fast charging and discharging.
Prospects of graphene
Prospects of graphene, applications of graphene, uses of graphene, graphene industry, semiconductor graphene, electric graphene
New light weight metal matrix composite
New metal matrix composite solve hardness and weight limits, which get great prospects in amphibious car or warship. It is a kind of new metal chemical compound.
Zegen Metals And Chemicals Limited
Zegen Metals&Chemicals Limited presents itself as a resource-oriented enterprise that deals in minor metals and chemicals, most of which are rare and precious. The company is located in Hong Kong to take advantage of resources from mainland China. It produces a variety of tellurium, bismuth, vanadium, gallium, germanium, and other metal products in various forms like ingots, granules, powders, and more. It aims to guarantee high quality and efficient service to customers. The document provides details on the company's location and products.
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Dielectric elastomers newly used in artificial joint
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Recently uploaded
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 skills3D Hybrid PIC simulation of the plasma expansion (ISSS-14)
3D Particle-In-Cell (PIC) algorithm,
Plasma expansion in the dipole magnetic field.
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:
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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
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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
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.
The debris of the ‘last major merger’ is dynamically young
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.
Shallowest Oil Discovery of Turkiye.pptx
The Petroleum System of the Çukurova Field - the Shallowest Oil Discovery of Türkiye, Adana
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.
Thornton ESPP slides UK WW Network 4_6_24.pdf
ESPP presentation to EU Waste Water Network, 4th June 2024 “EU policies driving nutrient removal and recycling
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Immersive Learning That Works: Research Grounding and Paths Forward
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.
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
8.Isolation of pure cultures and preservation of cultures.pdf
Isolation of pure culture, its various method.
Cytokines and their role in immune regulation.pptx
This presentation covers the content and information on "Cytokines " and their role in immune regulation .
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.
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.
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Evaporation step counter work. I have done a physical experiment.
(Work in progress.)
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Applied Science: Thermodynamics, Laws & Methodology.pdf
Applied Science: Thermodynamics, Laws & Methodology.pdf
The debris of the ‘last major merger’ is dynamically young
The debris of the ‘last major merger’ is dynamically young
aziz sancar nobel prize winner: from mardin to nobel
aziz sancar nobel prize winner: from mardin to nobel
The binding of cosmological structures by massless topological defects
The binding of cosmological structures by massless topological defects
Immersive Learning That Works: Research Grounding and Paths Forward
Immersive Learning That Works: Research Grounding and Paths Forward
Deep Software Variability and Frictionless Reproducibility
Deep Software Variability and Frictionless Reproducibility
8.Isolation of pure cultures and preservation of cultures.pdf
8.Isolation of pure cultures and preservation of cultures.pdf
Cytokines and their role in immune regulation.pptx
Cytokines and their role in immune regulation.pptx
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...
Compexometric titration/Chelatorphy titration/chelating titration
Compexometric titration/Chelatorphy titration/chelating titration
20240520 Planning a Circuit Simulator in JavaScript.pptx
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Samarium hexaboride both conductor and insulator
- 1. Http://www.zegmetal.com Samarium Hexaboride: Both Conductor and Insulator Recently, research team from University of Cambridge found samarium hexaboride of fantasic electrical characteristics, which positvely prove topological insulator ( close to rattan insulators), when low temperature, surface of SmB6 present conductive characteristics of metal property, but inner of material, it present characteristics of insulator. This research prove an new kind of conductive characteristics of materials, which challenge people perceive of traditional metal and insulating material. The research group is leaded by professor Suchitra Sebastian, who found special and difficult- explaining materials, Samarium hexaboride, which is good conductor at room temperature and it turn topological insulator whose manner of inner electron is complex and interaction is special.