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Sample records for crystal institute kent

  1. The Kent Face Matching Test.

    Science.gov (United States)

    Fysh, Matthew C; Bindemann, Markus

    2018-05-01

    This study presents the Kent Face Matching Test (KFMT), which comprises 200 same-identity and 20 different-identity pairs of unfamiliar faces. Each face pair consists of a photograph from a student ID card and a high-quality portrait that was taken at least three months later. The test is designed to complement existing resources for face-matching research, by providing a more ecologically valid stimulus set that captures the natural variability that can arise in a person's appearance over time. Two experiments are presented to demonstrate that the KFMT provides a challenging measure of face matching but correlates with established tests. Experiment 1 compares a short version of this test with the optimized Glasgow Face Matching Test (GFMT). In Experiment 2, a longer version of the KFMT, with infrequent identity mismatches, is correlated with performance on the Cambridge Face Memory Test (CFMT) and the Cambridge Face Perception Test (CFPT). The KFMT is freely available for use in face-matching research. © 2017 The British Psychological Society.

  2. Preliminary assessment report for Kent National Guard Facility (Installation 53065), 24410 Military Road, Kent, Washington

    International Nuclear Information System (INIS)

    Ketels, P.; Aggarwal, P.; Rose, C.M.

    1993-08-01

    This report presents the results of the preliminary assessment (PA) conducted by Argonne National Laboratory at the Washington Army National Guard property in Kent, Washington. Preliminary assessments of federal facilities are being conducted to compile the information necessary for completing preremedial activities and to provide a basis for establishing corrective actions in response to releases of hazardous substances. The principal objective of the PA is to characterize the site accurately and determine the need for further action by examining site activities, quantities of hazardous substances present, and potential pathways by which contamination could affect public health and the environment

  3. NATO Advanced Study Institute on Electronic Structure of Polymers and Molecular Crystals

    CERN Document Server

    Ladik, János

    1975-01-01

    The NATO Advanced Study Institute on "Electronic Structure of Polymers and Molecular Crystals" was held at the Facultes Universi­ taires de Namur (F.U.N.) from September 1st till September 14th, 1974. We wish to express our appreciation to the NATO Scientific Affairs Division whose generous support made this Institute possible and to the Facultes Universitaires de Namur and the Societe Chimique de Belgique which provided fellowships and travel grants to a number of students. This volume contains the main lectures about the basic principles of the field and about different recent developments of the theory of the electronic structure of polymers and molecular crystals. The school started with the presentation of the basic SCF-LCAO theory of the electronic structure of periodic polymers and molecular crystals (contributions by Ladik, Andre & Delhalle) showing how a combination of quantum chemical and solid state physical methods can provide band structures for these systems. The numerical aspects of these ...

  4. Existential contextuality and the models of Meyer, Kent, and Clifton

    International Nuclear Information System (INIS)

    Appleby, D.M.

    2002-01-01

    It is shown that the models recently proposed by Meyer, Kent, and Clifton (MKC) exhibit a novel kind of contextuality, which we term existential contextuality. In this phenomenon it is not simply the pre-existing value but the actual existence of an observable which is context dependent. This result confirms the point made elsewhere, that the MKC models do not, as the authors claim, 'nullify' the Kochen-Specker theorem. It may also be of some independent interest

  5. Chloroform anesthesia and the Saville Kent murder in 1860.

    Science.gov (United States)

    Hutcheon, Duncan E

    2010-01-01

    The discovery of the anesthetic properties of chloroform by Sir James Simpson is one of the therapeutic triumphs of the 19th century. Queen Victoria requested chloroform anesthesia for the birth of her second son, Prince Leopold, and from then until the end of century chloroform was the most popular general anesthetic for obstetrics and surgery. Chloroform was so pleasant to inhale that it became a drug of abuse and was involved in all sorts of criminal activity. Despite its wide usage, chloroform was not thought to be part of the brutal murder of 3-year-old Saville Kent on the night of June 30, 1860, outside his manor house in southwest England. The events surrounding and after the murder have recently been documented by Kate Summerscale in a book entitled, "The Suspicions of Mr. Whicher," the Detective Inspector assigned to the case by Scotland Yard. According to Ms Summerscale's records, Mr Whicher ignored the possibility that chloroform was involved in Saville's death. However, evidence supports the view that chloroform played a critical role in the crime and indicates that the guilty plea by Samuel Kent's daughter, Constance, for which she spent 20 years to the day in prison, was as inaccurate as it was incomplete.

  6. Cascade Apartments - Deep Energy Multifamily Retrofit , Kent, Washington (Fact Sheet)

    Energy Technology Data Exchange (ETDEWEB)

    None, None

    2014-02-01

    In December of 2009-10, King County Housing Authority (KCHA) implemented energy retrofit improvements in the Cascade multifamily community, located in Kent, Washington (marine climate.)This research effort involved significant coordination from stakeholders KCHA, WA State Department of Commerce, utility Puget Sound Energy, and Cascade tenants. This report focuses on the following three primary BA research questions : 1. What are the modeled energy savings using DOE low income weatherization approved TREAT software? 2. How did the modeled energy savings compare with measured energy savings from aggregate utility billing analysis? 3. What is the Savings to Investment Ratio (SIR) of the retrofit package after considering utility window incentives and KCHA capitol improvement funding.

  7. Kent in space: Cosmic dust to space debris

    Science.gov (United States)

    McDonnell, J. A. M.

    1994-10-01

    The dusty heritage of the University of Kent's Space Group commenced at Jodrell Bank, Cheshire, U.K., the home of the largest steerable radio telescope. While Professor Bernard Lovell's 250 ft. diameter telescope was used to command the U.S. deep space Pioneer spacecraft, Professor Tony McDonnell, as a research student in 1960, was developing a space dust detector for the US-UK Ariel program. It was successful. With a Ph.D. safely under the belt, it seemed an inevitable step to go for the next higher degree, a B.T.A.] Two years with NASA at Goddard Space Flight Center, Greenbelt, provided excellent qualifications for such a graduation ('Been to America'). A spirited return to the University of Kent at Canterbury followed, to one of the green field UK University sites springing from the Robbins Report on Higher Education. Swimming against the current of the brain drain, and taking a very considerable reduction in salary, it was with some disappointment that he found that the UK Premier Harold Wilson's 'white-hot technological revolution' never quite seemed to materialize in terms of research funding] Research expertise, centered initially on cosmic dust, enlarged to encompass planetology during the Apollo program, and rightly acquired international acclaim, notching up a history of space missions over 25 years. The group now comprises 38 people supported by four sources: the government's Research Councils, the University, the Space Agencies and Industry. This paper describes the thrust of the group's Research Plan in Space Science and Planetology; not so much based on existing international space missions, but more helping to shape the direction and selection of space missions ahead.

  8. 2008 Kent award lecture: an historian interprets the future of gerontology.

    Science.gov (United States)

    Achenbaum, W Andrew

    2010-04-01

    Donald Peterson Kent believed that gerontology would grow through innovative inquiry, effective teaching, and well-evaluated policies and programs that benefited the elderly people. Because advances in research, education, and practice sustain each other, Kent's tripartite agenda continues to be instructive as globalization presents fresh challenges and opportunities for gerontologists to advance our multifaceted, multidisciplinary, multinational enterprise. Donald Kent's vision offers a compelling blueprint for interpreting the field's future as gerontologists engage in theory building, educational trail blazing, and redefining older people's roles in aging societies.

  9. 2009 Federal Emergency Management Agency (FEMA) Topographic LiDAR: Fort Kent, Maine

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Camp Dresser McKee Inc. contracted with Sanborn Map Company to provide LiDAR mapping services for Fort Kent, Maine. Utilizing multi-return systems, Light Detection...

  10. 2006 Maryland Department of Natural Resources Lidar: Caroline, Kent and Queen Anne Counties

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Maryland Department of Natural Resources requested the collection of LIDAR data over Kent, Queen Anne and Caroline Counties, MD. In response, EarthData acquired the...

  11. crystal

    Science.gov (United States)

    Yu, Yi; Huang, Yisheng; Zhang, Lizhen; Lin, Zhoubin; Sun, Shijia; Wang, Guofu

    2014-07-01

    A Nd3+:Na2La4(WO4)7 crystal with dimensions of ϕ 17 × 30 mm3 was grown by the Czochralski method. The thermal expansion coefficients of Nd3+:Na2La4(WO4)7 crystal are 1.32 × 10-5 K-1 along c-axis and 1.23 × 10-5 K-1 along a-axis, respectively. The spectroscopic characteristics of Nd3+:Na2La4(WO4)7 crystal were investigated. The Judd-Ofelt theory was applied to calculate the spectral parameters. The absorption cross sections at 805 nm are 2.17 × 10-20 cm2 with a full width at half maximum (FWHM) of 15 nm for π-polarization, and 2.29 × 10-20 cm2 with a FWHM of 14 nm for σ-polarization. The emission cross sections are 3.19 × 10-20 cm2 for σ-polarization and 2.67 × 10-20 cm2 for π-polarization at 1,064 nm. The fluorescence quantum efficiency is 67 %. The quasi-cw laser of Nd3+:Na2La4(WO4)7 crystal was performed. The maximum output power is 80 mW. The slope efficiency is 7.12 %. The results suggest Nd3+:Na2La4(WO4)7 crystal as a promising laser crystal fit for laser diode pumping.

  12. NATO Advanced Study Institute on Advances in the Computer Simulations of Liquid Crystals

    CERN Document Server

    Zannoni, Claudio

    2000-01-01

    Computer simulations provide an essential set of tools for understanding the macroscopic properties of liquid crystals and of their phase transitions in terms of molecular models. While simulations of liquid crystals are based on the same general Monte Carlo and molecular dynamics techniques as are used for other fluids, they present a number of specific problems and peculiarities connected to the intrinsic properties of these mesophases. The field of computer simulations of anisotropic fluids is interdisciplinary and is evolving very rapidly. The present volume covers a variety of techniques and model systems, from lattices to hard particle and Gay-Berne to atomistic, for thermotropics, lyotropics, and some biologically interesting liquid crystals. Contributions are written by an excellent panel of international lecturers and provides a timely account of the techniques and problems in the field.

  13. 78 FR 78311 - Approval and Promulgation of Implementation Plans; Washington: Kent, Seattle, and Tacoma Second...

    Science.gov (United States)

    2013-12-26

    ... Amendments. The Washington Department of Ecology (Ecology) and the Puget Sound Clean Air Agency (PSCAA... prohibition on open burning, and industrial emission controls. These control measures were highly successful with monitoring data showing Kent, Seattle, and Tacoma meeting the PM 10 NAAQS since 1987, 1990, and...

  14. Managing Selection for Electronic Resources: Kent State University Develops a New System to Automate Selection

    Science.gov (United States)

    Downey, Kay

    2012-01-01

    Kent State University has developed a centralized system that manages the communication and work related to the review and selection of commercially available electronic resources. It is an automated system that tracks the review process, provides selectors with price and trial information, and compiles reviewers' feedback about the resource. It…

  15. [Standardization of the Kent Infant Development Scale: implications for primary care pediatricians].

    Science.gov (United States)

    García-Tornel Florensa, S; Ruiz España, A; Reuter, J; Clow, C; Reuter, L

    1997-02-01

    The purpose of this study was the standardization of an infant assessment protocol based on behavioral observations of Spanish parents. The Kent Infant Development (KIDS) scale was translated into Spanish and named "Escala de Desarrollo Infantil de Kent" (EDIK). The EDIK normative data were collected from the parents of 662 healthy infants (ages 1 to 15 months) in pediatric clinics. Infants born more than 2 weeks premature or who had serious physical or neurological illness were not included. EDIK raw scores of Spanish infants were converted to developmental ages by comparing them with the number of behaviors for each age group in the normative sample. We obtained the mean score and standard deviation for the full scale and different domains (cognitive, motor, social, language, and self-help). This study shows that EDIK is sensitive to differences in ages and a good instrument that allows one to make a classification between normal infants or those at risk. It should prove useful in developmental pediatric practice.

  16. Broad and Visionary. Commentary on Allen Kent (1977) Information Science. (Journal of Education for Librarianship, 17(3), 131-139)

    Science.gov (United States)

    Bates, Marcia J.

    2015-01-01

    Allen Kent was a pioneer in many aspects of library and information science (LIS), and yet, as this author reads Kent's 1977 article, there is not much in it that has become ancient, irrelevant history. The questions he discusses are still alive in the discipline in 2014, whether it is called LIS (library and information science), information…

  17. Prize for Industrial Applications of Physics: Reflective Cholesteric Liquid Crystals - Innovations in Materials, Display Technology, and Commercialization

    Science.gov (United States)

    Khan, Asad

    Reflective Cholesteric Liquid Crystals have been the subject of much research, development, and commercialization - in display technology as well as other embodiments, such as sensors, privacy films, etc. The liquid Crystal Institute (LCI) at Kent State University (KSU) served as a hot bed of much of the research and development in this field in the early 1990's. From here, the reflective technology was licensed to Kent Displays (KDI) to further develop and commercialize. The 90's saw some development in flexible technologies, drive scheme, display design, as well as materials. The early part of the century took a turn with a strong effort in encapsulation based flexible display development. In 2006, KDI engineers and technologists started firming up ambitious plans for the world's first roll-to-roll manufacturing line for bistable cholesteric displays. In 2009, this became a reality! In early 2010, the first eWriter product was launched into the consumer market under the brand Boogie Board®. Within months, this became a success forcing the rapid development of the manufacturing process for the flexible displays. Today, the company has two manufacturing lines, 24 hour roll-to-roll production of flexible displays, millions of Boogie Board products in the global market place, and a growing OEM business in the Boogie Board technology. KDI continues to do basic research, development, and exploration in the bistable display field. It also has had to become an expert in the supply chain management of the unique raw materials needed for flexible display manufacturing, while still managing global operations with sales offices in several continents and a growing and diversified group of individuals. In this presentation, we will present the story, research, development, technology, and latest trends in bistable cholesteric liquid crystal materials with a particular emphasis on the eWriter technology and market.

  18. Adaptation of the landscape for biodiversity to climate change : terrestrial case studies Limburg (NL), Kent and Hampshire (UK)

    NARCIS (Netherlands)

    Rooij, van S.A.M.; Baveco, J.M.; Bugter, R.J.F.; Eupen, van M.; Opdam, P.F.M.; Steingröver, E.G.; Taylor, S.; Steenwijk, van H.

    2007-01-01

    This study is part of the BRANCH project, aimed at assessing the impact of climate change on species and habitats and formulating strategies for adaptation. It focuses on the local scale in three terrestrial case studies, Limburg (NL) and in Kent and Hampshire (UK). We developed and tested: (a) a

  19. First GB records of the invasive Asian shore crab, Hemigrapsus sanguineus from Glamorgan, Wales and Kent, England.

    OpenAIRE

    Seeley, B; Sewell, J; Clark, PF

    2015-01-01

    The present contribution reports on the capture of two adult male specimens of the Asian/Japanese shore crab, Hemigrapsus sanguineus (de Haan, 1835) from Glamorgan, south Wales and Kent, southern England. These represent the first records of this species from mainland Great Britain.

  20. Kent County Health Department: Using an Agency Strategic Plan to Drive Improvement.

    Science.gov (United States)

    Saari, Chelsey K

    The Kent County Health Department (KCHD) was accredited by the Public Health Accreditation Board (PHAB) in September 2014. Although Michigan has had a state-level accreditation process for local health departments since the late 1990s, the PHAB accreditation process presented a unique opportunity for KCHD to build on successes achieved through state accreditation and enhance performance in all areas of KCHD programs, services, and operations. PHAB's standards, measures, and peer-review process provided a standardized and structured way to identify meaningful opportunities for improvement and to plan and implement strategies for enhanced performance and established a platform for being recognized nationally as a high-performing local health department. The current case report highlights the way in which KCHD has developed and implemented its strategic plan to guide efforts aimed at addressing gaps identified through the accreditation process and to drive overall improvement within our agency.

  1. Interview with a quality leader: Kent Bottles, MD, president of ICSI, on transforming care for the future. Interview by Susan V. White.

    Science.gov (United States)

    Bottles, Kent

    2010-01-01

    Kent Bottles, MD, President of the Institute for Clinical Systems Improvement (ICSI). Dr. Bottles is a board-certified pathologist who specialized in surgical and cyto-pathology. He earned a medical degree from Case Western Reserve University in Ohio. He has extensive experience in integrated healthcare delivery systems, research, academia, commercial laboratories, genomics, proteomics, and management of biotech start-up companies. Dr. Bottles was vice president and chief medical officer of the Iowa Health System. Before that, he served as president and CEO of Grand Rapids Medical Education and Research Center for Health Professions, a multi-institutional consortium of healthcare organizations, and as president of Genomics Repository and chief knowledge officer, Genomics Collaborative Inc. Dr. Bottles has extensive academic experience, serving as Professor and Acting Head, Department of Pathology and Laboratory Medicine at the University of Iowa. He was also the founding medical director of managed care plans for University of Iowa employees. Dr. Bottles has addressed topics ranging from quality and patient safety and disruptive technology to patient-physician relationships and the future of medicine. He has received numerous honors, including the Rodney T. West Literary Achievement Award for the most important article on medical management presented by the American College of Physician Executives. He has broad clinical experience with the University of Iowa and the San Francisco General Hospital, and has been a national leader in changing the practice of pathology and laboratory medicine to meet the challenges of managed care.

  2. Non-invasive diagnostic method using the phase image for the Kent fiber position in Wolff-Parkinson-White (WPW) syndrome

    Energy Technology Data Exchange (ETDEWEB)

    Konishi, Tokuji; Makino, Katsutoshi; Ichikawa, Takehiko; Futagami, Yasuo; Hamada, Masayuki (Mie Univ., Tsu (Japan). School of Medicine)

    1983-10-01

    Gated blood pool scintigraphy with sup(99m)Tc-RBC was performed in patients with WPW syndrome and healthy controls. The contraction of the normal ventricle and the Kent fiber position in cases of WPW syndrome were observed on the phase image obtained by Fourier-transformation of the time activity curve. This method is considered to be more valuable than the other non-invasive procedures in cases of WPW syndrome, especially in the preoperative examination for transecting Kent fibers.

  3. Comparative study of polycyclic aromatic hydrocarbons in coral tissues and the ambient sediments from Kenting National Park, Taiwan

    International Nuclear Information System (INIS)

    Ko, Fung-Chi; Chang, Chiung-Wen; Cheng, Jing-O.

    2014-01-01

    Surface sediments and corals (Acropora sp. and Montipora sp.) from the coastline of Kenting were analyzed in 2009 and 2010 for content levels of polycyclic aromatic hydrocarbons (PAHs) using gas chromatography-mass spectrometry. The total PAH concentrations (t-PAH) in corasls (143–1715 ng g −1 dw) were significantly higher than in the ambient sediments (2–59 ng g −1 dw) indicating the bioaccumulation of PAHs in corals. The spatial and seasonal variation in PAH levels suggested that land-loaded contaminants may be the main source of PAHs in the Kenting coral reefs. Based on molecular indices, PAHs were substantially of petroleum origin. The major PAH components were phenanthrene, pyrene and fluorine, but PAH congeners in corals and sediments still have characteristic composition patterns which would be altered by the bio/accumulation mechanisms. Further study is essential to assess and understand the impacts of these chemicals on coral reefs. Highlights: • PAH concentrations in Kenting coral reefs ranked minor in the worldwide comparison. • Isomeric ratios of PAHs suggested an important contribution of petrogenic sources. • PAHs have characteristic composition patterns which would be altered by the bio/accumulation mechanisms. • Higher levels of PAHs were found in coral tissues than in sediments (bioaccumulation). • Coral body burdens of PAHs were significantly correlated to adjacent sediments only at the areas with higher levels of PAHs. -- PAH levels in coral tissues were higher than in adjacent sediments (bioaccumulation)

  4. Institute news

    Science.gov (United States)

    1999-11-01

    : Heriot-Watt University 4 Nov: Strathclyde University 17 Nov: York University 24 Nov: Bristol University 1 Dec: Open University 7 Dec: Kent University 14 Dec: Cardiff University 15 Dec: University of Wales, Swansea 24 Jan: Reading University 10 Feb: Abingdon School 16 Feb: Plymouth University 2 Mar: Sheffield University 7 Mar: CLRC Daresbury Laboratory 8 Mar: Liverpool University 9 Mar: Manchester 10 Mar: Lancaster University 15 Mar: Surrey University 16 Mar: Brighton University 17 Mar: St Vincent College, Gosport 22 Mar: Leeds University 23 Mar: Loughborough Grammar School 24 Mar: Oakham School 30 Mar: St Peter's School, Wolverhampton 18 May: University of Hertfordshire 11 Jul: Science Museum 12 Jul: Royal Institution The assistance of the Engineering and Physical Sciences Research Council, CLRC Daresbury Laboratory and DERA Malvern is acknowledged in staging this year's events. Courses, lectures and competitions `Physics in perspective', the study course for sixth-formers and college students, will take place in London on 6 - 8 February 2000, offering insights into many different aspects of physics. The programme commences during the afternoon of Sunday 6 February at King's College London with a Balloon debate, followed by Brian O'Rourke's talk on the `Physics of Formula 1 cars'. On Monday 7 February at the Royal Institution, John Avison (former Honorary Editor of Physics Education) will develop the `Thinking physics' theme by presenting the audience with varied topics in an unusual and challenging way. The second talk of the afternoon, by Professor Roy Sambles, will cover `Lasers, light and liquid crystals'. On the final day (Tuesday 8 February), again at the Royal Institution, Sara Ellison will lead the audience in `Heavenly pursuits', whilst later Dr Colin Wright will entertain with `Juggling - theory and practice'. Futher information and bookings for the course can be made by contacting Mrs Leila Solomon at The Institute of Physics, 76 Portland Place, London W1N 3DH

  5. Multisite outbreak of norovirus associated with a franchise restaurant--Kent County, Michigan, May 2005.

    Science.gov (United States)

    2006-04-14

    The majority of cases of foodborne gastroenteritis in the United States are caused by noroviruses. This report summarizes an investigation by the Kent County Health Department (KCHD) in Michigan into three norovirus outbreaks and a cluster of community cases that were associated with a national submarine sandwich franchise restaurant during May 3-9, 2005. The investigation identified a potential source, a food handler who had returned to work within a few hours of having symptoms of gastrointestinal illness while he was still excreting norovirus in his stools. To prevent norovirus outbreaks, food service workers should be educated regarding norovirus transmission and control. In 2005, new guidelines for state health departments regarding norovirus containment were published by the Food and Drug Administration (FDA); guidelines for local health departments in Michigan were issued by the state's Department of Community Health and Department of Agriculture. The new guidelines for Michigan recommend that food service workers with suspected norovirus not return to work until they are asymptomatic for 48-72 hours.

  6. Late Wisconsinan Glacial Geomorphology of the Kent Interlobate Complex, Ohio, USA

    Directory of Open Access Journals (Sweden)

    João Bessa Santos

    2012-06-01

    Full Text Available The northern sector of the Kent Interlobate Complex, created by twomajor ice lobes of the Laurentide Ice Sheet during late Wisconsinan times, dominates the glacial landscape of northeast Ohio. The geomorphology of this impressive complex reveals the presence of large hummocks, kettle lakes and substantial esker chains. The esker chains,usually smaller than 1.3 km long, run parallel to the interlobate complex geographic orientation of northeast-southwest. Gravel pits present on large hummocks display bedded and sorted sedimentary units of gravel, sand and gravel and climbing ripple laminated sand with folds, which demonstrate that the northern sector of the interlobate complex is primarily a glaciofluvial feature. Topping these hummocks is a massive clast-supported diamicton interpreted to be a debris flow. These geomorphic and sedimentary characteristics seem to indicate that hummocks present in the interlobate area are in fact kames and that the entire northern sector of the interlobate complex is a product of late Wisconsinan time transgressive ice stagnation that occurred between two major ice lobes.

  7. Deconstructing The Stereotypes Of Women Throough A Female Voice In Burial Rites (2013 By Hannah Kent

    Directory of Open Access Journals (Sweden)

    Paramita Ayuningtyas

    2015-11-01

    Full Text Available Patriarchal society regulates how women should behave and act. If a woman obeys the social rules, she will be labeled as a good woman. On the other hand, if a woman does not follow the social values, she will be immediately categorized as an evil woman and given negative stereotypes. This binary opposition between a good woman and a bad woman is often criticized by the feminists because they think this categorization burdens women. This issue is also highlighted by Hannah Kent in her novel Burial Rites (2013. This novel is set in a rural society in Iceland in the 19th century with its patriarchal values, focusing on a woman named Agnes that will soon be executed. This theme interested the researcher to study Burial Rites more deeply using feminist perspective. Characters, setting and point of view are the intrinsic elements discussed in this research. The result of the analysis shows that through these three elements, Burial Rites describes society’s stereotypes about ‘evil women’ and there is an effort from the author to deconstruct the stereotype through a female voice.

  8. Lecture capture: enhancing learning through technology at the Kent State University College of Podiatric Medicine.

    Science.gov (United States)

    DiBacco, Priscilla M; Hetherington, Vincent J; Putman, David

    2012-01-01

    The intent of this research was to evaluate the Mediasite lecture capture system at the Kent State University College of Podiatric Medicine (formerly the Ohio College of Podiatric Medicine) to determine the acceptance, use and benefits to both students and faculty and to identify any concerns, limitations, and suggestions for expansion. There is extreme debate on the effect of lecture capture on student attendance included in the research. Two surveys were compiled, one each for students and faculty. These were distributed by email to the entire student body and all full-time and part-time faculty. Responses were voluntary. The questions sought to identify the priorities of the participant, reasons for viewing lectures compiled by course, to assess any effect on class attendance and to evaluate the ease and use of the technical function. There was also a section for subjective responses and suggestions. The tabulations proved a very high use of the program with the most important reason being to prepare for exams. The question of class attendance is still open to interpretation. Technically, the Mediasite system was ranked easy to use by both groups. The results of this survey confirm the concept of lecture capture as an integral segment of advanced education. Though this system should not replace class attendance, it is a vital supplement to course work and study. By reviewing all of the components of the survey those who may have concerns on its effectiveness are also aware of the advantages. The results of this study met all the objectives to evaluate use and obtain viewpoints to improve and expand the program.

  9. Yerel Dokusunu Yitirmekte Olan Bir Kent: Malatya A City Losing Its Local Texture: Malatya

    Directory of Open Access Journals (Sweden)

    Zaliha İnci KARABACAK

    2013-07-01

    ışı, modern kentleşme politikaları, ekonomik çıkarlar gibi çeşitli nedenlerle dönüşüme uğramaktadırlar. Bazı durumlarda, kentin çehresinde meydana gelen değişim kentin özüne zarar vermektedir. Günümüzde değişim bu yönüyle birçok şehirde etkisini göstermektedir. Bu durum ülkemizdeki birçok kentin yerel dokusunu kaybetmesine neden olmaktadır. Malatya; ekonomik, coğrafi, sosyal ve kültürel birtakım özellikleri ile öne çıkan bir şehirdir. Ancak bu ayırt edici değerlerin önemli bir bölümü değişime yenik düşmektedir. Bu bağlamda çalışmada, özellikle kente dünya çapında ekonomik bir değer kazandıran kayısı meyvesinin yetiştiği yeşil alanların ve kentin yerel mimari dokusunu oluşturan geleneksel Malatya evlerinin modern bir kent oluşturmak adına kente eklemlenen bulvar, kavşak, çok katlı konutlar gibi yapıların inşasında yaşadığı yaprak dökümü üzerinde durulmaktadır. Malatya’nın yitirmekte olduğu bu değerler, şehirde yakın tarihte çekilen bazı fotoğraflar aracılığıyla görsel olarak da ifade edilmektedir. Çalışmada, gündelik şehir yaşamında birçoğumuzun sıkça karşılaşarak içselleştirdiği benzeri değişimler Malatya örneği ile bir kez daha gündeme getirilmektedir. Böylece birey ve yurttaş olarak bu değişimlere daha duyarlı olma bilinci uyandırılmaya çalışılmaktadır.

  10. Research on the Selection Strategy of Green Building Parts Supplier Based on the Catastrophe Theory and Kent Index Method

    Directory of Open Access Journals (Sweden)

    Zhenhua Luo

    2016-01-01

    Full Text Available At present, the green building and housing industrialization are two mainstream directions in the real estate industry. The production of green building parts which combines green building and housing industrialization, two concepts, is to be vigorously developed. The key of quality assurance in the assembly project is choosing reliable and proper green building parts suppliers. This paper analyzes the inherent requirements of the green building, combined with the characteristics of the housing industrialization, and puts forward an evaluation index system of supplier selection for green building parts, which includes product index, enterprise index, green development index, and cooperation ability index. To reduce the influence of subjective factors, the improved method which merges Kent index method and catastrophe theory is applied to the green building parts supplier selection and evaluation. This paper takes the selection of the unit bathroom suppliers as an example, uses the improved model to calculate and analyze the data of each supplier, and finally selects the optimal supplier. With combination of the Kent index and the catastrophe theory, the result shows that it can effectively reduce the subjectivity of the evaluation and provide a basis for the selection of the green building parts suppliers.

  11. Non-invasive diagnostic method using the phase image for the Kent fiber position in Wolff-Parkinson-White (WPW) syndrome

    International Nuclear Information System (INIS)

    Konishi, Tokuji; Makino, Katsutoshi; Ichikawa, Takehiko; Futagami, Yasuo; Hamada, Masayuki

    1983-01-01

    Gated blood pool scintigraphy with sup(99m)Tc-RBC was performed in patients with WPW syndrome and healthy controls. The contraction of the normal ventricle and the Kent fiber position in cases of WPW syndrome were observed on the phase image obtained by Fourier-transformation of the time activity curve. This method is considered to be more valuable than the other non-invasive procedures in cases of WPW syndrome, especially in the preoperative examination for transecting Kent fibers. (Namekawa, K.)

  12. Bystander Cardiopulmonary Resuscitation Is Clustered and Associated With Neighborhood Socioeconomic Characteristics: A Geospatial Analysis of Kent County, Michigan.

    Science.gov (United States)

    Uber, Amy; Sadler, Richard C; Chassee, Todd; Reynolds, Joshua C

    2017-08-01

    Geographic clustering of bystander cardiopulmonary resuscitation (CPR) is associated with demographic and socioeconomic features of the community where out-of-hospital cardiac arrest (OHCA) occurred, although this association remains largely untested in rural areas. With a significant rural component and relative racial homogeneity, Kent County, Michigan, provides a unique setting to externally validate or identify new community features associated with bystander CPR. Using a large, countywide data set, we tested for geographic clustering of bystander CPR and its associations with community socioeconomic features. Secondary analysis of adult OHCA subjects (2010-2015) in the Cardiac Arrest Registry to Enhance Survival (CARES) data set for Kent County, Michigan. After linking geocoded OHCA cases to U.S. census data, we used Moran's I-test to assess for spatial autocorrelation of population-weighted cardiac arrest rate by census block group. Getis-Ord Gi statistic assessed for spatial clustering of bystander CPR and mixed-effects hierarchical logistic regression estimated adjusted associations between community features and bystander CPR. Of 1,592 subjects, 1,465 met inclusion criteria. Geospatial analysis revealed significant clustering of OHCA in more populated/urban areas. Conversely, bystander CPR was less likely in these areas (99% confidence) and more likely in suburban and rural areas (99% confidence). Adjusting for clinical, demographic, and socioeconomic covariates, bystander CPR was associated with public location (odds ratio [OR] = 1.19; 95% confidence interval [CI] = 1.03-1.39), initially shockable rhythms (OR = 1.48; 95% CI = 1.12-1.96), and those in urban neighborhoods (OR = 0.54; 95% CI = 0.38-0.77). Out-of-hospital cardiac arrest and bystander CPR are geographically clustered in Kent County, Michigan, but bystander CPR is inversely associated with urban designation. These results offer new insight into bystander CPR patterns in mixed urban and rural

  13. An investigation into the move towards electronic journals: a case study of NHS libraries in Kent, Surrey and Sussex.

    Science.gov (United States)

    England, Rebecca

    2013-09-01

    Electronic journals are so embedded into practice in academic libraries that it is easy to forget that this is not the case everywhere. In NHS libraries, for example, the staff face a particular set of issues. This article is based on Rebecca England's dissertation on this topic, completed as part of the MSc Econ course in Information and Library studies at Aberystwyth University. Rebecca is E-resources Librarian at the Maidstone and Tunbridge Wells NHS Trust. She investigated the momentum towards electronic journals in NHS libraries in the Kent, Surrey and Sussex region and the potential for a regional purchasing consortium. © 2013 The author. Health Information and Libraries Journal © 2013 Health Libraries Group.

  14. Kent Mobilyalarının Bulundukları Mekânlara Etkileri: Düzce Örneği

    Directory of Open Access Journals (Sweden)

    Emine ÇOBAN

    2014-09-01

    Full Text Available Kent mobilyaları kentsel açık alanların vazgeçilmez öğeleridir. Düzce ili önemli ölçüde açık alanlara sahiptir. Bu alanların planlanması, kullanımı, tasarımı konusunda çalışmalar yapılmaktadır. Kentsel mobilyalarda bu tasarım çalışmalarının önemli bir parçasıdır. Kentsel mobilyaların işlevsel, anlamsal, simgesel ve psikolojik etkileri göz önünde bulundurularak çalışmalara yön verilebilir. Bu bağlamda bu çalışmada kent mobilyaları ve yer aldıkları mekânlara etkileri ortaya konulmaya çalışılmıştır. İl genelinde farklı özellikler içeren alanlar (ticari, eğitim, sanayi vb seçilerekbu mekânlarda bulunan aynı kent mobilyalarının farklı etkileri ve farklı kent mobilyalarının aynı etkileri değerlendirilmiş sonuç olarak kent mobilyaları bulundukları mekânların fonksiyonelliklerini arttırdığı, bulundukları mekânları daha fonksiyonel hale getirdiği ve mekânların estetik kalitesini arttırdığı bulgulanmıştır

  15. An investigation into dental digital radiography in dental practices in West Kent following the introduction of the 2006 NHS General Dental Services contract.

    Science.gov (United States)

    Mauthe, Peter W; Eaton, Kenneth A

    2011-04-01

    The primary aims of the study were to investigate the use of digital radiography within primary dental care practices in the West Kent Primary Care Trust (PCT) area and general dental practitioners' (GDPs) self-reported change in radiographic prescribing patterns following the introduction of the nGDS contract in 2006. Data were gathered via a piloted, self-completed questionnaire, and circulated to all GDPs listed on the National Health Service (NHS) Choices website as practising in the West Kent PCT area. There were three mailings and follow-up telephone calls. The resulting data were entered into a statistical software database and, where relevant, statistically tested, using the chi-square test and Pearson correlation coefficient. Of 223 GDPs, 168 (75%) responded. There were 163 usable questionnaires. The respondents represented 85% of the general dental practices in West Kent. Eighty (49%) respondents were using digital intra-oral radiography. Of those who used digital radiography, 44 (55%) reported that they used phosphor plate systems and 36 (45%) that they used direct digital sensors. Eighty-three (51%) had a panoramic machine in their practice, 46 of whom (55%) were using digital systems; of these, 32 (67%) were using a direct digital system. Seventy-one GDPs reported that they worked exclusively or mainly in private practice. Forty (56%) of these 'mainly private' GDPs reported that they used digital radiographic systems, whereas only 40 (44%) of the 89 'mainly NHS' GDPs reported using digital radio-graphic systems. On average, mainly private GDPs made the transition to a digital radiographic system six months before mainly NHS GDPs. Of those who provided NHS dentistry before and after April 2006, only 18 (14%) reported taking fewer radiographs and seven (6%) taking more. In February 2010, of the West Kent GDPs who responded to the questionnaire, just under 50% used digital radio graphy. Mainly private GDPs were more likely to use digital radiography than

  16. A PILOT PROJECT FOR THE DEVELOPMENT OF EDUCATIONAL RESEARCH TECHNIQUES AND PROCEDURES SUITABLE FOR THE MEASUREMENT OF INSTITUTIONAL STABILITY AND CHANGE.

    Science.gov (United States)

    TURNEY, DAVID T.

    THE PROBLEM INVESTIGATED IN THIS STUDY INVOLVED THE DEVELOPMENT OF TECHNIQUES AND PROCEDURES THAT COULD YIELD MEASURES OF INSTITUTIONAL STABILITY AND CHANGE ALONG A TIME CONTINUUM. THE STUDY FOCUSED ON THE PUPILS AND TEACHERS IN THE UNIVERSITY SCHOOL OF KENT STATE UNIVERSITY (658 PUPILS IN KINDERGARTEN CLASSES THROUGH GRADE 12 AND 29 INSTRUCTORS).…

  17. Role of institutional controls in selection of remedial measures

    International Nuclear Information System (INIS)

    Bakr, A.A.; Agoston, E.N.; McLeod, R.V.; Hicks, H.T.

    1992-01-01

    This paper explores the regulatory intent of CERCLA's definition and applicability of institutional controls at hazardous substance release sites undergoing remedial action and institutional controls that have been defined and implemented at selected CERCLA (Superfund) sites in the United States. Under provisions of CERCLA, institutional controls can be components of, or supplements to, interim or final remedial measures for hazardous substance [as defined under CERCLA 101(14)] releases. The use of institutional controls has been proposed in a number of RODs for large Superfund sites (e.g., Times Beach, Missouri; the Clothier Disposal Site in Oswego County, New York; and the Wildcat Landfill in Kent County, Delaware). In these cases, the selected remedial actions combine active response measures with institutional controls to protect human health and the environment. These RODs provide insight to how widely the concept of institutional controls is used and under what conditions. The use of institutional controls at large federal facilities is also discussed

  18. Chatham-Kent Hydro 2005 conservation and demand management plan : turn it off, turn it down, trade it in

    International Nuclear Information System (INIS)

    2005-01-01

    An outline of Chatham-Kent Hydro's conservation and demand management (CDM) plan was presented. The goal of the plan was to reduce energy consumption while assisting customers to achieve higher levels of energy efficiency. The plan was designed to support and expand on Chatham-Hydro's efforts in public education and interval metering, and also introduced other CDM programs such as smart metering; real time monitoring and load control; line loss improvements; power factor correction; and load displacement. The energy efficiency programs will use educational and financial incentives to help consumers save money. Educational programs were designed to explain the benefits of energy efficiency to consumers and service providers. All the programs are intended to provide consumers with the information necessary to pursue efficiency measures as well as to train service providers to increase their ability to provide efficient services. Various financial incentives will also be used to make the purchase of efficient technologies more economically feasible. It was noted that CDM programs will be monitored and evaluated based on costs, priorities and calculated annual financial savings before implementation. A budget summary was also included. Issues concerning commercial and industrial energy efficiency were examined, and details of low and fixed income customer programs were outlined. Strategies for municipal street lighting, heating, ventilation and air conditioning (HVAC) systems and new construction were presented. 1 tab., 1 fig

  19. La memoria del último exilio español en la escritura de tres mujeres: Victoria Kent, Dolores Ibárruri y Carmen Parga

    Directory of Open Access Journals (Sweden)

    Bettina Pacheco

    2011-11-01

    Full Text Available Resumo: Este artigo realiza uma breve análise de três obras de testemunhos do exílio escritas por mulheres: Victoria Kent, destacada advogada socialista cromprometida com o governo da República Espanhola; Dolores Ibárruri, a mítica Pasionária; e Carmen Parga, republicana exilada na Rússia e México. As três dão sua visão, a sua maneira e através da escrita, sobre o drama vivido oferecendo sua concepção particular do exílio. Antes de entrar nas obras aludidas, examina-se brevemente as duas concepções sobre a dramática experiência do exilado que Cláudio Guillén reconheceu na escrita dos clássicos: Ovídio e Plutarco.Palavras-chave: Literatura comparada; literatura espanhola; Victoria Kent; Dolores Ibárruri; Carmen Parga; literatura latina; Ovídio; Plutarco; exílio.Resumen: Este artículo realiza um somero análisis de três obras testimoniales del exílio escritas por mujeres: Victoria Kent, destacada abogada socialista comprometida com el gobierno de la República Española; Dolores Ibárruri, la mítica Pasionaria; y Carmen Parga, republicana exiliada en Rusía y México. Las tres dan su visión, a su manera y a través de la escritura, sobre el drama vivido ofreciendo su concepción particular del exílio. Antes de entrar en las obras aludidas, se examina brevemente las dos concepiones sobre la dramática experiencia del exilado que Cláudio Guillén há reconocido em la escritura de dos clássicos: Ovídio y Plutarco.Palabras-clave: Literatura comparada; literatura española; Victoria Kent; Dolores Ibárruri; Carmen Parga; literatura latina; Ovídio; Plutarco; exílio.Keywords: Comparative literature; Spanish literature; Victoria Kent; Dolores Ibárruri; Carmen Parga; latin literature; Ovid; Plutarch; exile.

  20. Puente muscular de conducción entre aurículas y ventrículos simulando el haz de Kent

    Directory of Open Access Journals (Sweden)

    Francisco Montoya P.

    1985-01-01

    Full Text Available Because of the economical impossibility of the Colombian Hospitals to finance the ever increasing costs of the pacemakers, we have been forced to look for an alternate biological solution. Using as our anatomical model the bundle of Kent in patients suffering from WPW, we have devised a simple surgical technique to form a muscular conductíve "bypas" between the auricles and the ventricles. Of the four dogs that were subjected to this technique, two suggest that effective conduction occurs. The resulting EKG's were similar to those from patients with WPW in one case, and in the other paroxistic tachicardias were observed.

  1. [A new method for evaluating psychomotor development based on information from parents. The Spanish version of the Kent Infant Development Scale].

    Science.gov (United States)

    García-Tornel Florensa, S; García García, J J; Reuter, J; Clow, C; Reuter, L

    1996-05-01

    The purpose of this dissertation research was to design, standardize and validate the Spanish version of the Kent Infant Development Scale (KIDS). This questionnaire is based on information obtained from the parents. It was translated into Spanish and named "Escala de Desarrollo Infantil de Kent" (EDIK). The EDIK normative data were collected from the parents of 662 healthy infants (ages 1 to 15 months) in pediatric clinics in Catalonia (Spain). Test-retest reliability (r = 0.99; p < 0.001), interjudge reliability (r = 0.98; p < 0.001) and internal consistency (Cronbach alpha = 0.9947) were determined. An "r' of 0.96 was obtained when EDIK scores were compared to their estimated developmental ages obtained from the Denver Developmental Scale. The correlation of the infants' chronological age and their EDIK was 0.96 (p < 0.001). The high reliability and validity correlation coefficients demonstrate the sound psychometric properties of the EDIK. It appears to be a useful and acceptable instrument in measuring the developmental status of infants by using the reports of their parents.

  2. CAMBIOS EN LA COMPOSICIÓN DE ALMIDÓN, PECTINAS Y HEMICELULOSAS DURANTE LA MADURACIÓN DE MANGO (Mangifera indica cv. KENT

    Directory of Open Access Journals (Sweden)

    Wendy Guadalupe Cárdenas-Coronel

    2012-01-01

    y se mantuvo en valores cercanos a los 250 mg·100 g-1 peso fresco (pf en los distintos estados de madurez; sin embargo, la disminución de glucosa y galactosa fue de 50 % durante el ablandamiento inicial. La fracción péctica predominante fue la hidrosoluble, que presentó una relación urónicos:azúcares cercana a 2:1, y el azúcar neutro de mayor concentración fue arabinosa. Durante el ablandamiento de los frutos de mango ¿Kent¿, se presentaron cambios en la solubilidad y grado de polimerización de polisacáridos pécticos y hemicelulósicos.

  3. Formerly utilized MED/AEC sites remedial action program post-remedial-action radiological survey of Kent Chemical Laboratory, the University of Chicago, Chicago, IL

    International Nuclear Information System (INIS)

    Wynveen, R.A.; Smith, W.H.; Sholeen, C.M.; Justus, A.L.; Flynn, K.F.

    1983-05-01

    A comprehensive radiological assessment of Kent Laboratory was conducted during September 1977, by the ANL Radiological Survey Group to determine if any radioactive contamination remained. The results of the assessment indicated the need for remedial action. Since 1977, the University has decontaminated this laboratory building, and in May 1983, the Department of Energy requested the ANL Radiological Survey Group to conduct a post-remedial-action survey. All the contaminated areas identified during the 1977 assessment were rechecked. Contamination remained in six of the rooms. Further decontamination of these areas was conducted by university personnel, and as a result, these areas are now free of contamination. However, a contaminated clay pipe in the attic remained. The clay pipe has since been removed and disposed of as solid radioactive waste. During the post-remedial-action survey, six soil samples were collected from excavation trenches dug in Rooms 1 and 2 as part of the University's remedial action efforts. Also, four sludge samples were taken from below the manhole covers in the basement of Kent Chemical Laboratory to assess the radiological condition of the sewer system. A radiological assessment of the sewer system had not been accomplished during the 1977 survey as per program direction. Radiochemical (fluorometric) and gamma-spectral analyses indicated that eight out of ten soil and sludge samples contained levels of radioactivity above expected background concentrations. The soil has since been further excavated. The building is now free of radioactive contamination in excess of background levels; however, the sewers do contain radioactive materials above background levels since contamination was found at appropriate access points. 6 references, 16 figures, 7 tables

  4. Crystals in crystals

    DEFF Research Database (Denmark)

    Christensen, Claus H.; Schmidt, I.; Carlsson, A.

    2005-01-01

    A major factor governing the performance of catalytically active particles supported on a zeolite carrier is the degree of dispersion. It is shown that the introduction of noncrystallographic mesopores into zeolite single crystals (silicalite-1, ZSM-5) may increase the degree of particle dispersion....... As representative examples, a metal (Pt), an alloy (PtSn), and a metal carbide (beta-Mo2C) were supported on conventional and mesoporous zeolite carriers, respectively, and the degree of particle dispersion was compared by TEM imaging. On conventional zeolites, the supported material aggregated on the outer surface...

  5. Virtual Crystallizer

    Energy Technology Data Exchange (ETDEWEB)

    Land, T A; Dylla-Spears, R; Thorsness, C B

    2006-08-29

    Large dihydrogen phosphate (KDP) crystals are grown in large crystallizers to provide raw material for the manufacture of optical components for large laser systems. It is a challenge to grow crystal with sufficient mass and geometric properties to allow large optical plates to be cut from them. In addition, KDP has long been the canonical solution crystal for study of growth processes. To assist in the production of the crystals and the understanding of crystal growth phenomena, analysis of growth habits of large KDP crystals has been studied, small scale kinetic experiments have been performed, mass transfer rates in model systems have been measured, and computational-fluid-mechanics tools have been used to develop an engineering model of the crystal growth process. The model has been tested by looking at its ability to simulate the growth of nine KDP boules that all weighed more than 200 kg.

  6. single crystals

    Indian Academy of Sciences (India)

    2018-05-18

    May 18, 2018 ... Abstract. 4-Nitrobenzoic acid (4-NBA) single crystals were studied for their linear and nonlinear optical ... studies on the proper growth, linear and nonlinear optical ..... between the optic axes and optic sign of the biaxial crystal.

  7. Crystal Systems.

    Science.gov (United States)

    Schomaker, Verner; Lingafelter, E. C.

    1985-01-01

    Discusses characteristics of crystal systems, comparing (in table format) crystal systems with lattice types, number of restrictions, nature of the restrictions, and other lattices that can accidently show the same metrical symmetry. (JN)

  8. Monomial Crystals and Partition Crystals

    Science.gov (United States)

    Tingley, Peter

    2010-04-01

    Recently Fayers introduced a large family of combinatorial realizations of the fundamental crystal B(Λ0) for ^sln, where the vertices are indexed by certain partitions. He showed that special cases of this construction agree with the Misra-Miwa realization and with Berg's ladder crystal. Here we show that another special case is naturally isomorphic to a realization using Nakajima's monomial crystal.

  9. RNA Crystallization

    Science.gov (United States)

    Golden, Barbara L.; Kundrot, Craig E.

    2003-01-01

    RNA molecules may be crystallized using variations of the methods developed for protein crystallography. As the technology has become available to syntheisize and purify RNA molecules in the quantities and with the quality that is required for crystallography, the field of RNA structure has exploded. The first consideration when crystallizing an RNA is the sequence, which may be varied in a rational way to enhance crystallizability or prevent formation of alternate structures. Once a sequence has been designed, the RNA may be synthesized chemically by solid-state synthesis, or it may be produced enzymatically using RNA polymerase and an appropriate DNA template. Purification of milligram quantities of RNA can be accomplished by HPLC or gel electrophoresis. As with proteins, crystallization of RNA is usually accomplished by vapor diffusion techniques. There are several considerations that are either unique to RNA crystallization or more important for RNA crystallization. Techniques for design, synthesis, purification, and crystallization of RNAs will be reviewed here.

  10. Crystallization mechanisms of acicular crystals

    Science.gov (United States)

    Puel, François; Verdurand, Elodie; Taulelle, Pascal; Bebon, Christine; Colson, Didier; Klein, Jean-Paul; Veesler, Stéphane

    2008-01-01

    In this contribution, we present an experimental investigation of the growth of four different organic molecules produced at industrial scale with a view to understand the crystallization mechanism of acicular or needle-like crystals. For all organic crystals studied in this article, layer-by-layer growth of the lateral faces is very slow and clear, as soon as the supersaturation is high enough, there is competition between growth and surface-activated secondary nucleation. This gives rise to pseudo-twinned crystals composed of several needle individuals aligned along a crystallographic axis; this is explained by regular over- and inter-growths as in the case of twinning. And when supersaturation is even higher, nucleation is fast and random. In an industrial continuous crystallization, the rapid growth of needle-like crystals is to be avoided as it leads to fragile crystals or needles, which can be partly broken or totally detached from the parent crystals especially along structural anisotropic axis corresponding to weaker chemical bonds, thus leading to slower growing faces. When an activated mechanism is involved such as a secondary surface nucleation, it is no longer possible to obtain a steady state. Therefore, the crystal number, size and habit vary significantly with time, leading to troubles in the downstream processing operations and to modifications of the final solid-specific properties. These results provide valuable information on the unique crystallization mechanisms of acicular crystals, and show that it is important to know these threshold and critical values when running a crystallizer in order to obtain easy-to-handle crystals.

  11. EFEITO DE ÓLEOS ESSENCIAIS E REVESTIMENTOS COMESTÍVEIS SOBRE PODRIDÕES PÓS-COLHEITA EM MANGA, CV. KENT

    Directory of Open Access Journals (Sweden)

    MARCELO DE MENEZES CRUZ

    2012-01-01

    Full Text Available The search for new antimicrobial agents from plants is intense due to the increasing resistance of pathogenic microorganisms to synthetic products. Moreover, the long term use of pesticides cause negative impacts to society and the environment due to pollution caused by chemical waste. The aim of this paper was to evaluate the effect of Lippia sidoides and Piper aduncum oils, carnauba wax and dextrin to control stem-end rot of mango. Fruits of mango cv. Kent were inoculated with suspensions of 106 (conidia/mL of Lasiodiplodia theobromae or Botryosphaeria dothidea, and after 24 hours there were applied the treatments. The experiment was organized on a completely randomized design with three replications and the experimental unit was composed of a tray containing six fruits. After eight days in cold storage (10 ± 2 º C the fruits were placed for five days at room temperature (25 ± 2 º C when were evaluated daily for the disease severity. The best treatments were Lippia sidoides and Piper aduncum oils that showed specificity to control stem-end rot caused by L. theobromae and B. dothidea on mango.

  12. Reversion of left ventricular systolic dysfunction and abnormal stress test: by catheter ablation, in a patient with Wolff-Parkinson-White syndrome from Para-Hisian Kent bundle.

    Science.gov (United States)

    Tu, Chung-Ming; Chu, Kai-Ming; Cheng, Cheng-Chung; Cheng, Shu-Mung; Lin, Wei-Shiang

    2010-01-01

    The diagnosis of Wolff-Parkinson-White syndrome is typically reserved for patients who experience ventricular pre-excitation and symptoms that are related to paroxysmal supraventricular tachycardia, such as chest pain, dyspnea, dizziness, palpitations, or syncope. Herein, we report the case of a 38-year-old woman who presented at our outpatient department because of exercise intolerance. Cardiac auscultation revealed a grade 2/6 pansystolic murmur over the left lower sternal border. Twelve-lead electrocardiography showed sinus rhythm at a rate of 76 beats/min, with a significant delta wave. Transthoracic echocardiography revealed abnormal left ventricular systolic function. The results of a thallium stress test were also abnormal. Coronary artery disease was suspected; however, coronary angiography yielded normal results. Electrophysiologic study revealed a para-Hisian Kent bundle and a dual atrioventricular nodal pathway. After radiofrequency catheter ablation was performed, the patient's left ventricular function improved and her symptoms disappeared. In Wolff-Parkinson-White syndrome, left ventricular systolic dyssynchrony can yield abnormal findings on echocardiography and thallium scanning--even in persons who have no cardiovascular risk factors. Physicians who are armed with this knowledge can avoid performing coronary angiography unnecessarily. Catheter ablation can reverse the dyssynchrony of the ventricle and improve the patient's symptoms.

  13. Maduración de los Frutos de las Variedades de Mango Tommy Atkins y Kent, Bajo Temperatura y Humedad Relativa Controladas

    Directory of Open Access Journals (Sweden)

    Lagos Roa Edilberto

    1992-12-01

    Full Text Available La presente investigación se llevó a cabo entre finales del año de 1987 y comienzos del año 1988 en el laboratorio de fisiología vegetal de la Facultad de Agronomía de la Universidad Nacional de Colombia, sede de Bogotá. El objetivo principal del trabajo consistió en determinar algunos índices que permitieran conocer los momentos más adecuados de maduración de los frutos de mango en las variedades Tommy Atkins y Kent. Para el efecto, se midió la tasa de respiración durante la maduración del fruto y simultáneamente se determinaron los contenidos de: azúcares totales, almidón, s6lidos solubles, acidez titulable, pH y características organoléptica, Los resultados permitieron concluir que se pueden emplear como índices de maduración: los contenidos mínimos de almidón y acidez titulable, los altos y estables contenidos de azúcares totales, un pH por encima de 4,8 y también las características organolépticas como coloración, aroma y consistencia.

  14. Impact of a commercial peat moss operation on water quality and biota in a small tributary of the Richibucto River, Kent County, New Brunswick, Canada.

    Science.gov (United States)

    Surette, C; Brun, G L; Mallet, V N

    2002-05-01

    The St-Charles Plain (Kent County, New Brunswick, Canada) commercial peat moss operation has been ongoing since 1983. To process the peat, a dry extraction method is used that requires extensive drainage of the peat bog. The water is directed toward sedimentation ponds, where it drains into a small brook, which feeds into a river affected by tidal salt water. Water discharge from the bog contains large amounts of peat particles that deposit in the surrounding watershed. As a result, the pH of the freshwater sites that receive the drainage water from the commercial operation, is fairly acidic (pH 3.9-4.7). Water samples from or near the peat moss operation have a higher concentration of total phosphorous and total organic carbon. The peat particles contain relatively high levels of total mercury, as reflected by analysis of peat sediments. However, the water samples contained low levels of dissolved mercury. Indigenous samples of biota-namely, sand shrimps (Crangon septemspinosa) and mummichogs (Fundulus heteroclitus)-did not contain mercury levels higher in the impacted sites than in the reference sites. Introduced blue mussels (Mytilus edulis) did not accumulate significant amounts of mercury during a 62-day exposure in the study area. Overall, the data suggest that although relatively large amounts of mercury-containing peat particles are discharged into the ecosystem, bioaccumulation of mercury in the biota does not occur.

  15. KENT MARKASI VE İMAJININ BELİRLENMESİ: RİZE ÖRNEĞİ - DETERMINATION OF THE CITY BRAND AND IMAGE: RIZE SAMPLE CASE

    Directory of Open Access Journals (Sweden)

    Mevlüde Canan CAN

    2014-08-01

    Full Text Available ÖzetGünümüzde, küreselleşme ile birlikte pek çok alan rekabet içine girmektedir. Bunlar arasında yerler(mekânlar, ülkeler, kentler yer almaktadır. Bu araştırmada; “Rize Kent Markası ve Marka İmajınınBelirlenmesi, Rize Kentinin imajının hangi unsurlardan oluştuğunun tespiti ve kentin, fiziki ve soyutözellikleri ile kent halkının, nasıl algılandığının ölçümlenmesi hedeflenmiştir. Bu bağlamda araştırmadaRizeli olmayan kişiler çalışma evreni olarak seçilmiştir. Araştırmanın örnek büyüklüğü; zaman vemaliyet kısıtlaması nedeniyle araştırma verileri Rize Sosyal Bilimler Meslek Yüksek Okulu’nda okuyanTürkiye’nin farklı kentlerinden gelen öğrencilerin yaşadıkları şehirlerdeki gönüllü katılımcılar üzerindekolayda örnekleme yoluyla anket yöntemi ile yapılmıştır. Araştırma SPSS 16 programı ile analiz edilmiştir.Araştırma sonuçları frekans, betimleyici istatistik ile değerlendirilmiştir. Araştırmada, Rize denilincecevaplayıcıların akıllarına ilk önce “Çay” kelimesi gelirken bunu “Doğal güzellik” ve “Başbakan” ifadeleriizlemektedir. Katılımcılara göre Rize’yi en iyi ifade eden kavram “Doğal Güzelliklere Sahip” olması iken;en az tercih edilen kavram şehrin “Dışa Açık” bir il olmasıdır. Rize halkını en iyi ifade eden kavramlar ise“Çalışkan” ve Dindar” olmasıdır. Katılımcıların büyük çoğunluğu Üniversitenin Rize›nin tanınmasındayararlı olacağını düşünmektedir. Ankete katılanlar turizm açısından Rize’yi en iyi ifade eden özelliğin“doğal güzelliklere sahip olan bir il” olduğunu belirtmişlerdir. Yürütülen çalışma; Rize ilinin tanınırlığıile turizm potansiyeli arasında doğrudan bir ilişki olduğunu ortaya koymaktadır. Tanınırlık ve kent imajıarttıkça turizm çeşitliliği ve geliri de artmaktadır. Bu nedenle; kent imajının yüksek olması gelecekte

  16. KENT MARKASI VE İMAJININ BELİRLENMESİ: RİZE ÖRNEĞİ - DETERMINATION OF THE CITY BRAND AND IMAGE: RIZE SAMPLE CASE

    Directory of Open Access Journals (Sweden)

    Mevlüde Canan CAN

    2014-07-01

    Full Text Available ÖzetGünümüzde, küreselleşme ile birlikte pek çok alan rekabet içine girmektedir. Bunlar arasında yerler(mekânlar, ülkeler, kentler yer almaktadır. Bu araştırmada; “Rize Kent Markası ve Marka İmajınınBelirlenmesi, Rize Kentinin imajının hangi unsurlardan oluştuğunun tespiti ve kentin, fiziki ve soyutözellikleri ile kent halkının, nasıl algılandığının ölçümlenmesi hedeflenmiştir. Bu bağlamda araştırmadaRizeli olmayan kişiler çalışma evreni olarak seçilmiştir. Araştırmanın örnek büyüklüğü; zaman vemaliyet kısıtlaması nedeniyle araştırma verileri Rize Sosyal Bilimler Meslek Yüksek Okulu’nda okuyanTürkiye’nin farklı kentlerinden gelen öğrencilerin yaşadıkları şehirlerdeki gönüllü katılımcılar üzerindekolayda örnekleme yoluyla anket yöntemi ile yapılmıştır. Araştırma SPSS 16 programı ile analiz edilmiştir.Araştırma sonuçları frekans, betimleyici istatistik ile değerlendirilmiştir. Araştırmada, Rize denilincecevaplayıcıların akıllarına ilk önce “Çay” kelimesi gelirken bunu “Doğal güzellik” ve “Başbakan” ifadeleriizlemektedir. Katılımcılara göre Rize’yi en iyi ifade eden kavram “Doğal Güzelliklere Sahip” olması iken;en az tercih edilen kavram şehrin “Dışa Açık” bir il olmasıdır. Rize halkını en iyi ifade eden kavramlar ise“Çalışkan” ve Dindar” olmasıdır. Katılımcıların büyük çoğunluğu Üniversitenin Rize›nin tanınmasındayararlı olacağını düşünmektedir. Ankete katılanlar turizm açısından Rize’yi en iyi ifade eden özelliğin“doğal güzelliklere sahip olan bir il” olduğunu belirtmişlerdir. Yürütülen çalışma; Rize ilinin tanınırlığıile turizm potansiyeli arasında doğrudan bir ilişki olduğunu ortaya koymaktadır. Tanınırlık ve kent imajıarttıkça turizm çeşitliliği ve geliri de artmaktadır. Bu nedenle; kent imajının yüksek olması gelecekte

  17. Engineering Institute

    Science.gov (United States)

    Projects Past Projects Publications NSEC » Engineering Institute Engineering Institute Multidisciplinary engineering research that integrates advanced modeling and simulations, novel sensing systems and new home of Engineering Institute Contact Institute Director Charles Farrar (505) 665-0860 Email UCSD EI

  18. Principles of crystallization, and methods of single crystal growth

    International Nuclear Information System (INIS)

    Chacra, T.

    2010-01-01

    Most of single crystals (monocrystals), have distinguished optical, electrical, or magnetic properties, which make from single crystals, key elements in most of technical modern devices, as they may be used as lenses, Prisms, or grating sin optical devises, or Filters in X-Ray and spectrographic devices, or conductors and semiconductors in electronic, and computer industries. Furthermore, Single crystals are used in transducer devices. Moreover, they are indispensable elements in Laser and Maser emission technology.Crystal Growth Technology (CGT), has started, and developed in the international Universities and scientific institutions, aiming at some of single crystals, which may have significant properties and industrial applications, that can attract the attention of international crystal growth centers, to adopt the industrial production and marketing of such crystals. Unfortunately, Arab universities generally, and Syrian universities specifically, do not give even the minimum interest, to this field of Science.The purpose of this work is to attract the attention of Crystallographers, Physicists and Chemists in the Arab universities and research centers to the importance of crystal growth, and to work on, in the first stage to establish simple, uncomplicated laboratories for the growth of single crystal. Such laboratories can be supplied with equipment, which are partly available or can be manufactured in the local market. Many references (Articles, Papers, Diagrams, etc..) has been studied, to conclude the most important theoretical principles of Phase transitions,especially of crystallization. The conclusions of this study, are summarized in three Principles; Thermodynamic-, Morphologic-, and Kinetic-Principles. The study is completed by a brief description of the main single crystal growth methods with sketches, of equipment used in each method, which can be considered as primary designs for the equipment, of a new crystal growth laboratory. (author)

  19. Institutional advantage

    NARCIS (Netherlands)

    Martin, Xavier

    Is there such a thing as institutional advantage—and what does it mean for the study of corporate competitive advantage? In this article, I develop the concept of institutional competitive advantage, as distinct from plain competitive advantage and from comparative institutional advantage. I first

  20. Evolutionary institutionalism.

    Science.gov (United States)

    Fürstenberg, Dr Kai

    Institutions are hard to define and hard to study. Long prominent in political science have been two theories: Rational Choice Institutionalism (RCI) and Historical Institutionalism (HI). Arising from the life sciences is now a third: Evolutionary Institutionalism (EI). Comparative strengths and weaknesses of these three theories warrant review, and the value-to-be-added by expanding the third beyond Darwinian evolutionary theory deserves consideration. Should evolutionary institutionalism expand to accommodate new understanding in ecology, such as might apply to the emergence of stability, and in genetics, such as might apply to political behavior? Core arguments are reviewed for each theory with more detailed exposition of the third, EI. Particular attention is paid to EI's gene-institution analogy; to variation, selection, and retention of institutional traits; to endogeneity and exogeneity; to agency and structure; and to ecosystem effects, institutional stability, and empirical limitations in behavioral genetics. RCI, HI, and EI are distinct but complementary. Institutional change, while amenable to rational-choice analysis and, retrospectively, to criticaljuncture and path-dependency analysis, is also, and importantly, ecological. Stability, like change, is an emergent property of institutions, which tend to stabilize after change in a manner analogous to allopatric speciation. EI is more than metaphorically biological in that institutional behaviors are driven by human behaviors whose evolution long preceded the appearance of institutions themselves.

  1. Quality of Life Through Gender Role Perspective in Candidate Renal Transplant Recipients: A Report From Başkent University Using the Short Form 36 Health Survey.

    Science.gov (United States)

    Akyüz Özdemir, Aydan; Sayın, Cihat Burak; Erdal, Rengin; Özcan, Cihangir; Haberal, Mehmet

    2018-03-01

    The aim of the study was to evaluate the quality of life of patients with end-stage renal disease through a "gender role perspective." Patients were on hemodialysis treatment and on a wait list for transplant. This study was conducted at the Başkent University Adana, Ankara, and Istanbul hemodialysis centers. Patients completed Short Form 36 Health Survey questionnaires voluntarily to evaluate quality of life. The questions were answered independently by patients while they were undergoing hemodialysis treatment. The mean age of participants was 54 ± 16.5 years. Quality of life was found to be higher in men (44.7 ± 19.2), and there was a negative correlation between quality of life and age in both sexes, as well as marriage age, number of pregnancies, and age of patient at the first live birth in women (P < .05). We found statistically significant differences between men and women regarding physical health and mental health dimensions. Quality of life scores increased with level of education (P < .001). In addition, patients in Ankara had the highest quality of life compared with Istanbul and Adana (P < .01). Average time on hemodialysis treatment, the number of weekly hemodialysis sessions, mean time of the disease, and mean duration of abandoning hemodialysis sessions were negatively associated with all components of quality of life (P < .05). We found that sex, education level, social status, and home city of patients had a high impact on quality of life. Thus, it is essential to educate both male and female patients regarding sex/gender and health issues before transplant to increase the recipient's physical and mental health dimensions.

  2. Institutional entrepreneurship:

    DEFF Research Database (Denmark)

    Gretzinger, Susanne

    2018-01-01

    Institutional entrepreneurship pays specific attention to the process and outcomes of agents who are willing and capable of changing institutions. It has some common ground with the political entrepreneur, a concept that proposes change in norms and institutions because of commitment and activities...... of agents or organisations in the policy arena. The present chapter understands institutional entrepreneurship as the process of changing institutionalised practices. Based on a literature review, it describes the triggers, activities and potential effects of institutional entrepreneurs. The chapter...... concludes by tentatively arguing that political entrepreneurs can be institutional entrepreneurs, but institutional entrepreneurship can be considered as the broader concept that incorporates strategies and visions as well as interpretative-discursive power into the conceptual framework....

  3. Behavior of 11 Foodborne Bacteria on Whole and Cut Mangoes var. Ataulfo and Kent and Antibacterial Activities of Hibiscus sabdariffa Extracts and Chemical Sanitizers Directly onto Mangoes Contaminated with Foodborne Bacteria.

    Science.gov (United States)

    Rangel-Vargas, Esmeralda; Luna-Rojo, Anais M; Cadena-Ramírez, Arturo; Torres-Vitela, Refugio; Gómez-Aldapa, Carlos A; Villarruel-López, Angélica; Téllez-Jurado, Alejandro; Villagómez-Ibarra, José R; Reynoso-Camacho, Rosalía; Castro-Rosas, Javier

    2018-05-01

    The behavior of foodborne bacteria on whole and cut mangoes and the antibacterial effect of Hibiscus sabdariffa calyx extracts and chemical sanitizers against foodborne bacteria on contaminated mangoes were investigated. Mangoes var. Ataulfo and Kent were used in the study. Mangoes were inoculated with Listeria monocytogenes, Shigella flexneri, Salmonella Typhimurium, Salmonella Typhi, Salmonella Montevideo, Escherichia coli strains (O157:H7, non-O157:H7 Shiga toxin-producing, enteropathogenic, enterotoxigenic, enteroinvasive, and enteroaggregative). The antibacterial effect of five roselle calyx extracts (water, ethanol, methanol, acetone, and ethyl acetate), sodium hypochlorite, colloidal silver, and acetic acid against foodborne bacteria were evaluated on contaminated mangoes. The dry extracts obtained with ethanol, methanol, acetone, and ethyl acetate were analyzed by nuclear magnetic resonance spectroscopy to determine solvent residues. Separately, contaminated whole mangoes were immersed in five hibiscus extracts and in sanitizers for 5 min. All foodborne bacteria attached to mangoes. After 20 days at 25 ± 2°C, all foodborne bacterial strains on whole Ataulfo mangoes had decreased by approximately 2.5 log, and on Kent mangoes by approximately 2 log; at 3 ± 2°C, they had decreased to approximately 1.9 and 1.5 log, respectively, on Ataulfo and Kent. All foodborne bacterial strains grew on cut mangoes at 25 ± 2°C; however, at 3 ± 2°C, bacterial growth was inhibited. Residual solvents were not detected in any of the dry extracts by nuclear magnetic resonance. Acetonic, ethanolic, and methanolic roselle calyx extracts caused a greater reduction in concentration (2 to 2.6 log CFU/g) of all foodborne bacteria on contaminated whole mangoes than the sodium hypochlorite, colloidal silver, and acetic acid. Dry roselle calyx extracts may be a potentially useful addition to disinfection procedures of mangoes.

  4. SERPUKHOV: Focusing particles by a crystal

    International Nuclear Information System (INIS)

    Anon.

    1991-01-01

    With several Laboratories having shown how bent crystals can be used to steer particle beams, a team working at the Institute for High Energy Physics (IHEP) at Serpukhov, near Moscow, has shown how these crystals can also be used to focus particle beams

  5. Helium crystals

    International Nuclear Information System (INIS)

    Lipson, S.G.

    1987-01-01

    Hexagonal close-packed helium crystals in equilibrium with superfluid have been found to be one of the few systems in which an anisotropic solid comes into true thermodynamic equilibrium with its melt. The discovery of roughening transitions at the liquid-solid interface have shown this system to be ideal for the study of the statistical mechanics of interface structures. We describe the effect of roughening on the shape and growth of macroscopic crystals from both the theoretical and experimental points of view. (author)

  6. Colonial Institutions

    DEFF Research Database (Denmark)

    McAtackney, Laura; Palmer, Russell

    2016-01-01

    and the USA which reveal that the study of colonial institutions should not be limited to the functional life of these institutions—or solely those that take the form of monumental architecture—but should include the long shadow of “imperial debris” (Stoler 2008) and immaterial institutions....

  7. Institutional upbringing

    DEFF Research Database (Denmark)

    Gulløv, Eva

    2008-01-01

    In the chapter, I discuss the role day care institutions play in the construction of the idea of proper childhood in Denmark. Drawing on findings from research on ethnic minority children in two Danish day care institutions, I begin with a discussion of how childcare institutions act as civilising...... agents, empowered with the legitimate right to define and control normality and proper ways of behaving oneself. I aim to show how institutions come to define the normal child and proper childhood in accordance with current efforts toward reinventing national culture, exemplified by legislation requiring...... current testing of Danish language fluency levels among pre-school minority children. Testing language skills marks and defines distinctions that reinforce images of deviance that, in turn, legitimize initiatives to enrol children, specifically minority children, in child care institutions....

  8. Does routine child health surveillance contribute to the early detection of children with pervasive developmental disorders? – An epidemiological study in Kent, U.K.

    Directory of Open Access Journals (Sweden)

    Ritchie Jane

    2004-03-01

    Full Text Available Abstract Background Recently changed guidelines for child health surveillance in the United Kingdom (U.K. suggest targeted checks only, instead of the previously conducted routine or universal screening at 2 years and 3.5 years. There are concerns that these changes could lead to a delay in the detection of children with autism and other pervasive developmental disorders (PDD. Recent U.K. studies have suggested that the prevalence of PDD is much higher than previously estimated. This study establishes to which extent the routine checks contributed to the early detection and assessment of cases of PDD. Simultaneously we have evaluated the process involved and estimate the prevalence of PDD in our district. Methods Retrospective study design utilising community medical files. Headteachers of schools (n = 75 within Maidstone district (Kent were asked to report all children with an established diagnosis of autism or PDD attending year 4 (born '91 and '92 / n = 2536 in October 2000 based on educational records. Results 59 schools (78.7% took part in the study. A total of 33 children were reported. 21 fulfilled the inclusion criteria (12 falsely reported. The prevalences were (per 10,000: PDD 82.8 (male to female ratio 6:1, childhood autism 23.7, Asperger's syndrome 11.8 and autistic spectrum disorder 47.3. Co-existing medical conditions were noted in 14.3%; 52.4% were attending mainstream schools. In 63.2% of cases concerns – mainly in the area of speech and language development (SLD – had been documented at the 2 year check. At the 3.5 year check concerns were noted in 94.1% – the main area was again SLD (76.5%, although behavioural abnormalities were becoming more frequent (47.1%. A total of 13 children (68.4% were referred for further assessment as a direct result of the checks. Conclusions The prevalences for different types of PDD were similar to figures published recently, but much higher than reported a few years ago. Analysis of our

  9. Kasv tuleb europrojektidest / Madli Kents

    Index Scriptorium Estoniae

    Kents, Madli

    2003-01-01

    Audiitorfirmade TOP 50 3. koht. Deloitte & Touche Eesti AS-i nõukogu esimehe Tiit Järve sõnul saavutas ettevõte konkurentsieelise europrojektide ja rahvusvahelise emafirma toetuse tõttu. Diagramm: Tänavu ootab ees parem tulemus. Kommenteerib Mati Nõmmiste

  10. Institutional actorhood

    DEFF Research Database (Denmark)

    Madsen, Christian Uhrenholdt

    In this paper I describe the changing role of intra-organizational experts in the face of institutional complexity of their field. I do this through a qualitative investigation of the institutional and organizational roles of actors in Danish organizations who are responsible for the efforts...... to comply with the Danish work environment regulation. And by doing so I also describe how institutional complexity and organizational responses to this complexity are particular important for the changing modes of governance that characterizes contemporary welfare states....

  11. Institutional Investors

    DEFF Research Database (Denmark)

    Birkmose, Hanne Søndergaard; Strand, Therese

    Research Question/Issue: Institutional investors are facing increased pressure and threats of legislation from the European Union to abandon passive ownership strategies. This study investigates the prerequisites for – and potential dissimilarities in the practice of, active ownership among...... institutional investors in two Scandinavian countries with diminutive legal and cultural distance in general. Research Findings/Insights: Using data on shareholder proposals from Danish and Swedish annual general meetings from 2006 throughout 2010, we find that institutional investors are approximately....../Policy Implications: Regulators should be aware of the impact by local governance mechanisms, and how shareholders react under different legal and practical prerequisites. The paper also highlights legal elements that differ between Denmark and Sweden, and which might affect institutional activism....

  12. Institutional Controls

    Data.gov (United States)

    U.S. Environmental Protection Agency — This dataset consists of institutional control data from multiple Superfund sites in U.S. EPA Region 8. These data were acquired from multiple sources at different...

  13. Institutional Assessment

    International Development Research Centre (IDRC) Digital Library (Canada)

    Many approaches can and have helped research institutions in the developing .... There are many good texts on project and program evaluation, not to ...... has challenged managers and students of organizational development for decades.

  14. Magnetophotonic crystals

    Energy Technology Data Exchange (ETDEWEB)

    Inoue, M [Toyohashi University of Technology, Toyohashi, Aichi 441-8580 (Japan); Fujikawa, R [Toyohashi University of Technology, Toyohashi, Aichi 441-8580 (Japan); Baryshev, A [Toyohashi University of Technology, Toyohashi, Aichi 441-8580 (Japan); Khanikaev, A [Toyohashi University of Technology, Toyohashi, Aichi 441-8580 (Japan); Lim, P B [CREST, Japan Science and Technology Agency, Saitama 332-0012, Japan (Japan); Uchida, H [Toyohashi University of Technology, Toyohashi, Aichi 441-8580 (Japan); Aktsipetrov, O [Lomonosov Moscow State University, Leninskie Gory, Moscow, 119992 (Russian Federation); Fedyanin, A [Lomonosov Moscow State University, Leninskie Gory, Moscow, 119992 (Russian Federation); Murzina, T [Lomonosov Moscow State University, Leninskie Gory, Moscow, 119992 (Russian Federation); Granovsky, A [Lomonosov Moscow State University, Leninskie Gory, Moscow, 119992 (Russian Federation)

    2006-04-21

    When the constitutive materials of photonic crystals (PCs) are magnetic, or even only a defect introduced in PCs is magnetic, the resultant PCs exhibit very unique optical and magneto-optical properties. The strong photon confinement in the vicinity of magnetic defects results in large enhancement in linear and nonlinear magneto-optical responses of the media. Novel functions, such as band Faraday effect, magnetic super-prism effect and non-reciprocal or magnetically controllable photonic band structure, are predicted to occur theoretically. All the unique features of the media arise from the existence of magnetization in media, and hence they are called magnetophotonic crystals providing the spin-dependent nature in PCs. (topical review)

  15. Magnetophotonic crystals

    International Nuclear Information System (INIS)

    Inoue, M; Fujikawa, R; Baryshev, A; Khanikaev, A; Lim, P B; Uchida, H; Aktsipetrov, O; Fedyanin, A; Murzina, T; Granovsky, A

    2006-01-01

    When the constitutive materials of photonic crystals (PCs) are magnetic, or even only a defect introduced in PCs is magnetic, the resultant PCs exhibit very unique optical and magneto-optical properties. The strong photon confinement in the vicinity of magnetic defects results in large enhancement in linear and nonlinear magneto-optical responses of the media. Novel functions, such as band Faraday effect, magnetic super-prism effect and non-reciprocal or magnetically controllable photonic band structure, are predicted to occur theoretically. All the unique features of the media arise from the existence of magnetization in media, and hence they are called magnetophotonic crystals providing the spin-dependent nature in PCs. (topical review)

  16. Women Factor in Urban Economy of Eyup in Tulip Era (LALE DEVRİ EYÜP KENT EKONOMİSİNDE KADIN FAKTÖRÜ

    Directory of Open Access Journals (Sweden)

    Yasemin Keskin

    2016-07-01

    Full Text Available Osmanlı toplumunda kadınların ekonomik alanda aktif olmadıkları kanaati yaygındır. Hâlbuki son zamanlarda yapılan bazı araştırmalar ve kaynaklardaki veriler bunun doğru olmadığını göstermiştir. Kadınların da İslam hukukunun bir gereği olarak babalarından ve kocalarından bağımsız bir şekilde mal, mülk ve servet sahibi oldukları görülmüştür. Onların servetleri menkul (ev eşyası, giyim-kuşam, ziynet, takı eşyaları, ziraat aletleri vs. ve gayrimenkul mallar (ev, arsa, tarla, bağ, bahçe, değirmen, dükkân, çiftlik, nakit para, köle ve cariyelerden oluşmaktadır. Bu servetlerini iki yoldan elde etmişlerdir. Ticaret ve emekleriyle elde ettikleri kazançlar, kira gelirleri ve vakıf görevleri sebebiyle aldıkları ücretler onların doğrudan gelirlerini oluştururken, miras, çeyiz, mihr (mihr-i muaccel, mihr-i müeccel, nafaka (evlilik, iddet, hidane ve çocuk hibe ve tazminatlar (öldürme veya yaralama ise onların dolaylı gelirlerini oluşturmuştur. Erkekler kadar yoğun bir çalışma hayatında olmasalar da ev ve ziraat işleri ile aile ekonomisine katkıda bulunan kadınlar, daha ziyade satarak veya tüketerek kent ekonomisinin pasif aktörü olmuşlardır. Abstract: It is a common idea that women did not take an active role in Ottoman society. However, collected data from sources and recent research show that this is not accurate. As a requirement of the Islamic Law, women are found to have property, domain and fortune separately from their husband and father. Their fortune consists of personal (furniture, tureng, jewellery, jewellery items, agricultural tools etc and immovable properties (house, buildingland, field, vineyard, garden, mill, shop, farm, cash, slave and odalisque. They generate this income in two ways. Whereas rental income, commercial and charitable foundation earning constitute women’s direct income; inheritance, dowery, bridewealth (mihr-i muaccel, mihr-i m

  17. Institutional Awareness

    DEFF Research Database (Denmark)

    Ahlvik, Carina; Boxenbaum, Eva

    Drawing on dual-process theory and mindfulness research this article sets out to shed light on the conditions that need to be met to create “a reflexive shift in consciousness” argued to be a key foundational mechanism for agency in institutional theory. Although past research has identified...... in consciousness to emerge and argue for how the varying levels of mindfulness in the form of internal and external awareness may manifest as distinct responses to the institutional environment the actor is embedded in....

  18. European Institutions?

    NARCIS (Netherlands)

    Meacham, Darian

    2016-01-01

    The aim of this article is to sketch a phenomenological theory of political institutions and to apply it to some objections and questions raised by Pierre Manent about the project of the European Union and more specifically the question of “European Construction”, i.e. what is the aim of the

  19. Institution Morphisms

    Science.gov (United States)

    Goguen, Joseph; Rosu, Grigore; Norvig, Peter (Technical Monitor)

    2001-01-01

    Institutions formalize the intuitive notion of logical system, including both syntax and semantics. A surprising number of different notions of morphisim have been suggested for forming categories with institutions as objects, and a surprising variety of names have been proposed for them. One goal of this paper is to suggest a terminology that is both uniform and informative to replace the current rather chaotic nomenclature. Another goal is to investigate the properties and interrelations of these notions. Following brief expositions of indexed categories, twisted relations, and Kan extensions, we demonstrate and then exploit the duality between institution morphisms in the original sense of Goguen and Burstall, and the 'plain maps' of Meseguer, obtaining simple uniform proofs of completeness and cocompleteness for both resulting categories; because of this duality, we prefer the name 'comorphism' over 'plain map.' We next consider 'theoroidal' morphisms and comorphisims, which generalize signatures to theories, finding that the 'maps' of Meseguer are theoroidal comorphisms, while theoroidal morphisms are a new concept. We then introduce 'forward' and 'semi-natural' morphisms, and appendices discuss institutions for hidden algebra, universal algebra, partial equational logic, and a variant of order sorted algebra supporting partiality.

  20. Copper co-crystallization and divalent metal salts cross-influence effect: A new optimization tool improving crystal morphology and diffraction quality

    Czech Academy of Sciences Publication Activity Database

    Kutá-Smatanová, Ivana

    2007-01-01

    Roč. 306, č. 2 (2007), s. 383-389 ISSN 0022-0248 Institutional research plan: CEZ:AV0Z60870520 Keywords : crystal * crystallization Subject RIV: CF - Physical ; Theoretical Chemistry Impact factor: 1.950, year: 2007

  1. Photonic time crystals.

    Science.gov (United States)

    Zeng, Lunwu; Xu, Jin; Wang, Chengen; Zhang, Jianhua; Zhao, Yuting; Zeng, Jing; Song, Runxia

    2017-12-07

    When space (time) translation symmetry is spontaneously broken, the space crystal (time crystal) forms; when permittivity and permeability periodically vary with space (time), the photonic crystal (photonic time crystal) forms. We proposed the concept of photonic time crystal and rewritten the Maxwell's equations. Utilizing Finite Difference Time Domain (FDTD) method, we simulated electromagnetic wave propagation in photonic time crystal and photonic space-time crystal, the simulation results show that more intensive scatter fields can obtained in photonic time crystal and photonic space-time crystal.

  2. Institutional obligation

    International Nuclear Information System (INIS)

    Rowan, S.S.; Berwager, S.D.

    1988-01-01

    The institutional obligation is to act to meet primary responsibilities in the face of risks. There are risks involved in taking action, both of a quantifiable and unquantifiable nature. This paper explores weighing the risks, choosing approaches that balance primary obligations with broader ones, and presenting ethical philosophies upon which policies and strategies are based. Federal government organizations and utilities--and Bonneville Power Administration qualifies as both--have a variety of responsibilities to the public they serve. The common responsibility is that of service; for Bonneville the primary responsibility is to serve the energy related needs. It is this primary institutional obligation, as it relates to other responsibilities--and the resulting strategy for handling indoor air quality in Bonneville's new homes program--that this paper examines

  3. Photonic Crystal Fibers

    National Research Council Canada - National Science Library

    Kristiansen, Rene E

    2005-01-01

    This report results from a contract tasking Crystal Fibre A/S as follows: Crystal Fibre will conduct research and development of large mode area, dual clad multi-core Yb-doped photonic crystal fiber...

  4. Institutional ethnography

    DEFF Research Database (Denmark)

    Lund, Rebecca; Tienari, Janne

    2016-01-01

    The study of M&As is dominated by positivist and functionalist world views and the use of quantitative methods. Although extant research also uses qualitative and mixed methods, it can be criticized for viewing its subject matter through an abstract and external lens. The researcher is placed in ......, and point to some of the problems in M&A studies identified through this lens. Finally, we argue why institutional ethnography, in comparison with other methods of inquiry, is particularly fruitful in the study of mergers and acquisitions....

  5. Pressure cryocooling protein crystals

    Science.gov (United States)

    Kim, Chae Un [Ithaca, NY; Gruner, Sol M [Ithaca, NY

    2011-10-04

    Preparation of cryocooled protein crystal is provided by use of helium pressurizing and cryocooling to obtain cryocooled protein crystal allowing collection of high resolution data and by heavier noble gas (krypton or xenon) binding followed by helium pressurizing and cryocooling to obtain cryocooled protein crystal for collection of high resolution data and SAD phasing simultaneously. The helium pressurizing is carried out on crystal coated to prevent dehydration or on crystal grown in aqueous solution in a capillary.

  6. Investigation of lactose crystallization process during condensed milk cooling using native vacuum-crystallizer

    Directory of Open Access Journals (Sweden)

    E. I. Dobriyan

    2016-01-01

    Full Text Available One of the most general defects of condensed milk with sugar is its consistency heterogeneity – “candying”. The mentioned defect is conditioned by the presence of lactose big crystals in the product. Lactose crystals size up to 10 µm is not organoleptically felt. The bigger crystals impart heterogeneity to the consistency which can be evaluated as “floury”, “sandy”, “crunch on tooth”. Big crystals form crystalline deposit on the can or industrial package bottom in the form of thick layer. Industrial processing of the product with the defective process of crystallization results in the expensive equipment damage of the equipment at the confectionary plant accompanied with heavy losses. One of the factors influencing significantly lactose crystallization is the product cooling rate. Vacuum cooling is the necessary condition for provision of the product consistency homogeneity. For this purpose the vacuum crystallizers of “Vigand” company, Germany, are used. But their production in the last years has been stopped. All-Russian dairy research institute has developed “The references for development of the native vacuum crystallizer” according to which the industrial model has been manufactured. The produced vacuum – crystallizer test on the line for condensed milk with sugar production showed that the product cooling on the native vacuum-crystallizer guarantees production of the finished product with microstructure meeting the requirements of State standard 53436–2009 “Canned Milk. Milk and condensed cream with sugar”. The carried out investigations evidences that the average lactose crystals size in the condensed milk with sugar cooled at the native crystallizer makes up 6,78 µm. The granulometric composition of the product crystalline phase cooled at the newly developed vacuum-crystallizer is completely identical to granulometric composition of the product cooled at “Vigand” vacuum-crystallizer.

  7. 76 FR 57748 - National Cancer Institute Notice of Closed Meetings

    Science.gov (United States)

    2011-09-16

    ... Logistics Branch, Division of Extramural Activities, National Cancer Institute, 6116 Executive Boulevard... Crystal City, 2799 Jefferson Davis Highway, Arlington, VA 22202. Contact Person: Sergei Radaev, PhD..., Scientific Review Officer, Special Review Logistics Branch, Division of Extramural Activities, National...

  8. Optimized dipole antennas on photonic band gap crystals

    International Nuclear Information System (INIS)

    Cheng, S.D.; Biswas, R.; Ozbay, E.; McCalmont, S.; Tuttle, G.; Ho, K.

    1995-01-01

    Photonic band gap crystals have been used as a perfectly reflecting substrate for planar dipole antennas in the 12--15 GHz regime. The position, orientation, and driving frequency of the dipole antenna on the photonic band gap crystal surface, have been optimized for antenna performance and directionality. Virtually no radiated power is lost to the photonic crystal resulting in gains and radiation efficiencies larger than antennas on other conventional dielectric substrates. copyright 1995 American Institute of Physics

  9. Crystallic silver amalgam – a novel electrode material

    Czech Academy of Sciences Publication Activity Database

    Daňhel, A.; Mansfeldová, Věra; Janda, Pavel; Vyskočil, V.; Barek, J.

    2011-01-01

    Roč. 136, č. 118 (2011), s. 36563662 ISSN 0003-2654 Institutional research plan: CEZ:AV0Z40400503 Keywords : crystallic silver amalgam * electrode materials * electrochemistry Subject RIV: CG - Electrochemistry Impact factor: 4.230, year: 2011

  10. Crystal structure of vanadite: Refinement of anisotropic displacement parameters

    Czech Academy of Sciences Publication Activity Database

    Laufek, F.; Skála, Roman; Haloda, J.; Císařová, I.

    2006-01-01

    Roč. 51, 3-4 (2006), s. 271-275 ISSN 1210-8197 Institutional research plan: CEZ:AV0Z30130516 Keywords : anisotropic displacement parameter * crystal structure * single-crystal X-ray refinement * vanadinite Subject RIV: DB - Geology ; Mineralogy

  11. Crystal growth and scintillation properties of Lu substituted CeBr.sub.3./sub. single crystals

    Czech Academy of Sciences Publication Activity Database

    Ito, T.; Yokota, Y.; Kurosawa, S.; Král, Robert; Kamada, K.; Pejchal, Jan; Ohashi, Y.; Yoshikawa, A.

    2016-01-01

    Roč. 452, Oct (2016), s. 65-68 ISSN 0022-0248. [American Conference on Crystal Growth and Epitaxy /20./ (ACCGE) / 17th Biennial Workshop on Organometallic Vapor Phase Epitaxy (OMVPE) / 2nd 2D Electronic Materials Symposium. Big Sky, MT, 02.08.2015-07.08.2015] Institutional support: RVO:68378271 Keywords : radiation * halides * scintillator materials * crystal growth Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 1.751, year: 2016

  12. CRYSTALLIZATION IN MULTICOMPONENT GLASSES

    Energy Technology Data Exchange (ETDEWEB)

    KRUGER AA; HRMA PR

    2009-10-08

    In glass processing situations involving glass crystallization, various crystalline forms nucleate, grow, and dissolve, typically in a nonuniform temperature field of molten glass subjected to convection. Nuclear waste glasses are remarkable examples of multicomponent vitrified mixtures involving partial crystallization. In the glass melter, crystals form and dissolve during batch-to-glass conversion, melter processing, and product cooling. Crystals often agglomerate and sink, and they may settle at the melter bottom. Within the body of cooling glass, multiple phases crystallize in a non-uniform time-dependent temperature field. Self-organizing periodic distribution (the Liesegnang effect) is common. Various crystallization phenomena that occur in glass making are reviewed.

  13. Crystallization In Multicomponent Glasses

    International Nuclear Information System (INIS)

    Kruger, A.A.; Hrma, P.R.

    2009-01-01

    In glass processing situations involving glass crystallization, various crystalline forms nucleate, grow, and dissolve, typically in a nonuniform temperature field of molten glass subjected to convection. Nuclear waste glasses are remarkable examples of multicomponent vitrified mixtures involving partial crystallization. In the glass melter, crystals form and dissolve during batch-to-glass conversion, melter processing, and product cooling. Crystals often agglomerate and sink, and they may settle at the melter bottom. Within the body of cooling glass, multiple phases crystallize in a non-uniform time-dependent temperature field. Self-organizing periodic distribution (the Liesegnang effect) is common. Various crystallization phenomena that occur in glass making are reviewed.

  14. Crystallization of carbohydrate oxidase from Microdochium nivale

    Czech Academy of Sciences Publication Activity Database

    Dušková, Jarmila; Dohnálek, Jan; Skálová, Tereza; Ostergaard, L. H.; Fuglsang, C. C.; Kolenko, Petr; Štěpánková, Andrea; Hašek, Jindřich

    2009-01-01

    Roč. 65, č. 6 (2009), s. 638-640 ISSN 1744-3091 R&D Projects: GA AV ČR IAA500500701; GA ČR GA305/07/1073 Institutional research plan: CEZ:AV0Z40500505 Keywords : carbohydrate oxidase * crystallization * data processing Subject RIV: CD - Macromolecular Chemistry Impact factor: 0.551, year: 2009

  15. Formation of structured nanophases in halide crystals

    Czech Academy of Sciences Publication Activity Database

    Kulveit, Jan; Demo, Pavel; Polák, Karel; Sveshnikov, Alexey; Kožíšek, Zdeněk

    2013-01-01

    Roč. 5, č. 6 (2013), s. 561-564 ISSN 2164-6627 R&D Projects: GA ČR GAP108/12/0891 Institutional support: RVO:68378271 Keywords : halide crystals * nucleation Subject RIV: BM - Solid Matter Physics ; Magnetism http://www.aspbs.com/asem.html#v5n6

  16. New crystals for dual-readout calorimetry

    Czech Academy of Sciences Publication Activity Database

    Akchurin, N.; Bedeschi, F.; Cardini, A.; Carosi, R.; Ciapetti, G.; Ferrari, R.; Franchino, S.; Fraternali, M.; Gaudio, G.; Hauptman, J.; Incagli, M.; Korzhik, M.; Lacava, F.; La Rotonda, L.; Livan, M.; Meoni, E.; Nikl, Martin; Pinci, D.; Policicchio, A.; Popescu, S.; Scuri, F.; Sill, A.; Vandelli, W.; Vedda, A.; Venturelli, T.; Voena, C.; Volobouev, I.; Wigmans, R.

    2009-01-01

    Roč. 604, č. 3 (2009), s. 512-526 ISSN 0168-9002 Institutional research plan: CEZ:AV0Z10100521 Keywords : calorimetry * Cherenkov light * high-Z scintillating crystals Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 1.317, year: 2009

  17. Maximizing Macromolecule Crystal Size for Neutron Diffraction Experiments

    Science.gov (United States)

    Judge, R. A.; Kephart, R.; Leardi, R.; Myles, D. A.; Snell, E. H.; vanderWoerd, M.; Curreri, Peter A. (Technical Monitor)

    2002-01-01

    A challenge in neutron diffraction experiments is growing large (greater than 1 cu mm) macromolecule crystals. In taking up this challenge we have used statistical experiment design techniques to quickly identify crystallization conditions under which the largest crystals grow. These techniques provide the maximum information for minimal experimental effort, allowing optimal screening of crystallization variables in a simple experimental matrix, using the minimum amount of sample. Analysis of the results quickly tells the investigator what conditions are the most important for the crystallization. These can then be used to maximize the crystallization results in terms of reducing crystal numbers and providing large crystals of suitable habit. We have used these techniques to grow large crystals of Glucose isomerase. Glucose isomerase is an industrial enzyme used extensively in the food industry for the conversion of glucose to fructose. The aim of this study is the elucidation of the enzymatic mechanism at the molecular level. The accurate determination of hydrogen positions, which is critical for this, is a requirement that neutron diffraction is uniquely suited for. Preliminary neutron diffraction experiments with these crystals conducted at the Institute Laue-Langevin (Grenoble, France) reveal diffraction to beyond 2.5 angstrom. Macromolecular crystal growth is a process involving many parameters, and statistical experimental design is naturally suited to this field. These techniques are sample independent and provide an experimental strategy to maximize crystal volume and habit for neutron diffraction studies.

  18. Cities and Socialization of Libraries in Medieval Europe Ortaçağ Avrupası'nda Kent Olgusu ve Kütüphanelerin Toplumsallaşma Süreci -II-

    Directory of Open Access Journals (Sweden)

    Dilek Bayır

    2000-12-01

    Full Text Available In this study, socialization of libraries in Mediavel Europe has been examined by means of the growing of cities and movements of ideologies. Cities, as results of economic based changes, caused the appearance of merchantiles in produce and consumption flows. Cities, by selecting an area outside of feudal city walls, and by consisting new living habits which shows differances from village living habits took its place in Mediavel Feudal Regime. While cities consist their conceits, conceits consists the specialisatians which identifies the city from the village. Technologic developments, innovations, the movements of different social classes, the changes in produce and consumption models, movements of ideologies; carried Medieval Europe to Enlighment Period after very long and difficult experiements. While the man in "Enlighment Period" ideologically based on rationalism and critical thinking; it realized knowledge as a product of rationalism. That realisation gave start to the socialisation of libraries and books and books which includes the "knowledge" stating with the innovation of press, the gobalization of books and the movements in cities gave speed to the interaction between cultures and effected the extansion of knowledge in a positive way. While knowledge was socialized by means of the opportunities of cities, libraries became space which knowledge can easily reachable by society. Cities arosed in Middle ageesand by effecting social structures, they became an indirect effect for reaching of libraries to society and moneyfree service. Bu çalışmada Ortaçağ Avrupası'nda kütüphanelerin toplumsallaşma süreci, kent olgusu ve düşünsel hareketlilikler bağlamında irdelenmektedir. Kentler; toplumların ekonomik temelli değişim süreçlerinin bir uzantısı olarak üretim-tüketim akışı içinde tüccar (burjuvazi sınıfını yaratmıştır. Tüccarlar kendilerine surlar dışında bir mekan (yaşam alanı seçerek g

  19. Cities and Socialization of Libraries in Medieval Europe Ortaçağ Avrupası'nda Kent Olgusu ve Kütüphanelerin Toplumsallaşma Süreci -I-

    Directory of Open Access Journals (Sweden)

    Dilek Bayır

    2000-09-01

    Full Text Available In this study, socialization of libraries in Medieval Europe has been examined by means of the growing of cities and movements of ideologies. Cities, as results of economic based changes, caused the apperance of merchantiles in produce and consumption flows. Cities, by selecting an area outside of feudal city walls, and by consisting new living habits which shows differances from village living habits took its place in Medieval Feudal Regime. While cities consist their conceits, conceits consists the specialisatians which identifies the city from the village. Technologic developments, innovations, the movements of different social classes, the changes in produce and consumption models, movements of ideologies; carried Medieval Europe to Enlighment Period after very long and difficult experiements. While the man in "Enlighment Period" ideologically based on rationalism and critical thinking; it realized knowledge as a product of rationalism. That realisation gave start to the socialisation of libraries and books and books which includes the "knowledge" stating with the innovation of press, the gobalization of books and the movements in cities gave speed to the interaction between cultures and effected the extansion of knowledge in a positive way. While knowledge was socialized by means of the opportunities of cities, libraries became space which knowledge can easily reachable by society. Cities arosed in Middle ageesand by effecting social structures, they became an indirect effect for reaching of libraries to society and moneyfree service. Bu çalışmada Ortaçağ Avrupası'nda kütüphanelerin toplumsallaşma süreci, kent olgusu ve düşünsel hareketlilikler bağlamında irdelenmektedir. Kentler; toplumların ekonomik temelli değişim süreçlerinin bir uzantısı olarak üretim-tüketim akışı içinde tüccar (burjuvazi sınıfını yaratmıştır. Tüccarlar kendilerine surlar dışında bir mekan (yaşam alanı seçerek g

  20. Photonic crystal pioneer

    Science.gov (United States)

    Anscombe, Nadya

    2011-08-01

    Over the past ten years, Crystal Fiber, now part of NKT Photonics, has been busy commercializing photonic crystal fibre. Nadya Anscombe finds out about the evolution of the technology and its applications.

  1. Crystallization Pathways in Biomineralization

    Science.gov (United States)

    Weiner, Steve; Addadi, Lia

    2011-08-01

    A crystallization pathway describes the movement of ions from their source to the final product. Cells are intimately involved in biological crystallization pathways. In many pathways the cells utilize a unique strategy: They temporarily concentrate ions in intracellular membrane-bound vesicles in the form of a highly disordered solid phase. This phase is then transported to the final mineralization site, where it is destabilized and crystallizes. We present four case studies, each of which demonstrates specific aspects of biological crystallization pathways: seawater uptake by foraminifera, calcite spicule formation by sea urchin larvae, goethite formation in the teeth of limpets, and guanine crystal formation in fish skin and spider cuticles. Three representative crystallization pathways are described, and aspects of the different stages of crystallization are discussed. An in-depth understanding of these complex processes can lead to new ideas for synthetic crystallization processes of interest to materials science.

  2. Photonic Crystal Nanocavity Arrays

    National Research Council Canada - National Science Library

    Altug, Hatice; Vuckovic, Jelena

    2006-01-01

    We recently proposed two-dimensional coupled photonic crystal nanocavity arrays as a route to achieve a slow-group velocity of light in all crystal directions, thereby enabling numerous applications...

  3. Growth of dopamine crystals

    Energy Technology Data Exchange (ETDEWEB)

    Patil, Vidya, E-mail: vidya.patil@ruparel.edu; Patki, Mugdha, E-mail: mugdha.patki@ruparel.edu [D. G. Ruparel College, Senapati Bapat Marg, Mahim, Mumbai – 400 016 (India)

    2016-05-06

    Many nonlinear optical (NLO) crystals have been identified as potential candidates in optical and electro-optical devices. Use of NLO organic crystals is expected in photonic applications. Hence organic nonlinear optical materials have been intensely investigated due to their potentially high nonlinearities, and rapid response in electro-optic effect compared to inorganic NLO materials. There are many methods to grow organic crystals such as vapor growth method, melt growth method and solution growth method. Out of these methods, solution growth method is useful in providing constraint free crystal. Single crystals of Dopamine have been grown by evaporating the solvents from aqueous solution. Crystals obtained were of the size of orders of mm. The crystal structure of dopamine was determined using XRD technique. Images of crystals were obtained using FEG SEM Quanta Series under high vacuum and low KV.

  4. Apparatus for mounting crystal

    Science.gov (United States)

    Longeway, Paul A.

    1985-01-01

    A thickness monitor useful in deposition or etching reactor systems comprising a crystal-controlled oscillator in which the crystal is deposited or etched to change the frequency of the oscillator. The crystal rests within a thermally conductive metallic housing and arranged to be temperature controlled. Electrode contacts are made to the surface primarily by gravity force such that the crystal is substantially free of stress otherwise induced by high temperature.

  5. ALICE photon spectrometer crystals

    CERN Multimedia

    Maximilien Brice

    2006-01-01

    Members of the mechanical assembly team insert the last few crystals into the first module of ALICE's photon spectrometer. These crystals are made from lead-tungstate, a crystal as clear as glass but with nearly four times the density. When a high-energy particle passes through one of these crystals it will scintillate, emitting a flash of light allowing the energy of photons, electrons and positrons to be measured.

  6. Crystal Growth Technology

    Science.gov (United States)

    Scheel, Hans J.; Fukuda, Tsuguo

    2004-06-01

    This volume deals with the technologies of crystal fabrication, of crystal machining, and of epilayer production and is the first book on industrial and scientific aspects of crystal and layer production. The major industrial crystals are treated: Si, GaAs, GaP, InP, CdTe, sapphire, oxide and halide scintillator crystals, crystals for optical, piezoelectric and microwave applications and more. Contains 29 contributions from leading crystal technologists covering the following topics: General aspects of crystal growth technology Silicon Compound semiconductors Oxides and halides Crystal machining Epitaxy and layer deposition Scientific and technological problems of production and machining of industrial crystals are discussed by top experts, most of them from the major growth industries and crystal growth centers. In addition, it will be useful for the users of crystals, for teachers and graduate students in materials sciences, in electronic and other functional materials, chemical and metallurgical engineering, micro-and optoelectronics including nanotechnology, mechanical engineering and precision-machining, microtechnology, and in solid-state sciences.

  7. Food crystallization and eggs.

    Science.gov (United States)

    Egg products can be utilized to control crystallization in a diverse realm of food products. Albumen and egg yolk can aid in the control of sugar crystal formation in candies. Egg yolk can enhance the textural properties and aid in the control of large ice crystal formation in frozen desserts. In...

  8. Magnetic, electrical and optical properties of liquid crystals

    International Nuclear Information System (INIS)

    Florea, S.C.

    1980-01-01

    This thesis lays stress on the study of thermotrop nematic liquid crystals. But the crystals whose mesomorphism is achieved by an increase and decrease in temperature and the crystal category exhibiting a mesomorphism in a deep freezing phase are also studied. The results of the research carried out in the laboratory of ''active media, lasers and matter-radiation interactions'' of the Institute for Physics and Technology of Radiation Apparata as well as in the laboratories of liquid crystals and nuclear magnetic resonance of the Polytechnical Institute of Bucharest during seven years have had in view two main objectives: to elucidate and prove experimentally a new mechanism of nuclear relaxation in liquid crystals, proposed by the author; to use the current experimental techniques and methods applied in the above-mentioned laboratories to characterize and test some foreign mesomorphic media which are synthesized locally, providing a wide range of applications, such as colour television. (author)

  9. Protein Crystal Growth

    Science.gov (United States)

    2003-01-01

    In order to rapidly and efficiently grow crystals, tools were needed to automatically identify and analyze the growing process of protein crystals. To meet this need, Diversified Scientific, Inc. (DSI), with the support of a Small Business Innovation Research (SBIR) contract from NASA s Marshall Space Flight Center, developed CrystalScore(trademark), the first automated image acquisition, analysis, and archiving system designed specifically for the macromolecular crystal growing community. It offers automated hardware control, image and data archiving, image processing, a searchable database, and surface plotting of experimental data. CrystalScore is currently being used by numerous pharmaceutical companies and academic and nonprofit research centers. DSI, located in Birmingham, Alabama, was awarded the patent Method for acquiring, storing, and analyzing crystal images on March 4, 2003. Another DSI product made possible by Marshall SBIR funding is VaporPro(trademark), a unique, comprehensive system that allows for the automated control of vapor diffusion for crystallization experiments.

  10. Photonic crystal light source

    Science.gov (United States)

    Fleming, James G [Albuquerque, NM; Lin, Shawn-Yu [Albuquerque, NM; Bur, James A [Corrales, NM

    2004-07-27

    A light source is provided by a photonic crystal having an enhanced photonic density-of-states over a band of frequencies and wherein at least one of the dielectric materials of the photonic crystal has a complex dielectric constant, thereby producing enhanced light emission at the band of frequencies when the photonic crystal is heated. The dielectric material can be a metal, such as tungsten. The spectral properties of the light source can be easily tuned by modification of the photonic crystal structure and materials. The photonic crystal light source can be heated electrically or other heating means. The light source can further include additional photonic crystals that exhibit enhanced light emission at a different band of frequencies to provide for color mixing. The photonic crystal light source may have applications in optical telecommunications, information displays, energy conversion, sensors, and other optical applications.

  11. How far could energy transport within a single crystal

    Science.gov (United States)

    Zhang, Yifan; Che, Yanke; Zhao, Jincai; Steve, Granick

    Efficient transport of excitation energy over long distance is a vital process in light-harvesting systems and molecular electronics. The energy transfer distance is largely restricted by the probability decay of the exciton when hopping within a single crystal. Here, we fabricated an organic single crystal within which the energy could transfer more than 100 μm, a distance only limited by its crystal size. Our system could be regarded as a ``Sprint relay game'' performing on different surface of tracks. Photoinduced ``athletes'' (excitons) triggered intermolecular ``domino'' reaction to propagate energy for a long distance. In addition, athletes with the same ability runs much farther on smooth ideal track (single crystal assembled from merely van der Waals interaction) than bumpy mud track (crystal assembled from combination of pi-stacking, hydrogen bond and van der Waals interactions). Our finding presents new physics on enhancing energy transfer length within a single crystal. Current Affiliation: Institute for Basic Science, South Korea.

  12. Scintillation crystal mounting apparatus

    International Nuclear Information System (INIS)

    Engdahl, L.W.; Deans, A.J.

    1982-01-01

    An improved detector head for a gamma camera is disclosed. The detector head includes a housing and a detector assembly mounted within the housing. Components of the detector assembly include a crystal sub-assembly, a phototube array, and a light pipe between the phototube array and crystal sub-assembly. The invention provides a unique structure for maintaining the phototubes in optical relationship with the light pipe and preventing the application of forces that would cause the camera's crystal to crack

  13. CMS lead tungstate crystals

    CERN Multimedia

    Laurent Guiraud

    2000-01-01

    These crystals are made from lead tungstate, a crystal that is as clear as glass yet with nearly four times the density. They have been produced in Russia to be used as scintillators in the electromagnetic calorimeter on the CMS experiment, part of the LHC project at CERN. When an electron, positron or photon passes through the calorimeter it will cause a cascade of particles that will then be absorbed by these scintillating crystals, allowing the particle's energy to be measured.

  14. Macromolecular crystallization in microgravity

    International Nuclear Information System (INIS)

    Snell, Edward H; Helliwell, John R

    2005-01-01

    Density difference fluid flows and sedimentation of growing crystals are greatly reduced when crystallization takes place in a reduced gravity environment. In the case of macromolecular crystallography a crystal of a biological macromolecule is used for diffraction experiments (x-ray or neutron) so as to determine the three-dimensional structure of the macromolecule. The better the internal order of the crystal then the greater the molecular structure detail that can be extracted. It is this structural information that enables an understanding of how the molecule functions. This knowledge is changing the biological and chemical sciences, with major potential in understanding disease pathologies. In this review, we examine the use of microgravity as an environment to grow macromolecular crystals. We describe the crystallization procedures used on the ground, how the resulting crystals are studied and the knowledge obtained from those crystals. We address the features desired in an ordered crystal and the techniques used to evaluate those features in detail. We then introduce the microgravity environment, the techniques to access that environment and the theory and evidence behind the use of microgravity for crystallization experiments. We describe how ground-based laboratory techniques have been adapted to microgravity flights and look at some of the methods used to analyse the resulting data. Several case studies illustrate the physical crystal quality improvements and the macromolecular structural advances. Finally, limitations and alternatives to microgravity and future directions for this research are covered. Macromolecular structural crystallography in general is a remarkable field where physics, biology, chemistry and mathematics meet to enable insight to the fundamentals of life. As the reader will see, there is a great deal of physics involved when the microgravity environment is applied to crystallization, some of it known, and undoubtedly much yet to

  15. Active Photonic Crystal Waveguides

    DEFF Research Database (Denmark)

    Ek, Sara

    This thesis deals with the fabrication and characterization of active photonic crystal waveguides, realized in III-V semiconductor material with embedded active layers. The platform offering active photonic crystal waveguides has many potential applications. One of these is a compact photonic...... due to photonic crystal dispersion. The observations are explained by the enhancement of net gain by light slow down. Another application based on active photonic crystal waveguides is micro lasers. Measurements on quantum dot micro laser cavities with different mirror configurations and photonic...

  16. A crystal barrel

    CERN Multimedia

    2007-01-01

    The production of crystals for the barrel of the CMS electromagnetic calorimeter has been completed. This is an important milestone for the experiment, which received the last of its 62,960 crystals on 9 March. The members of the team responsible for the crystal acceptance testing at CERN display the last crystal for the CMS electromagnetic calorimeter barrel. From left to right: Igor Tarasov, Etiennette Auffray and Hervé Cornet.One of the six machines specially developed to measure 67 different parameters on each crystal. Igor Tarasov is seen inserting the last batch of crystals into the machine. The last of the 62,960 CMS barrel crystals arrived at CERN on 9 March. Once removed from its polystyrene protection, this delicate crystal, like thousands of its predecessors, will be inserted into the last of the 36 supermodules of the barrel electromagnetic calorimeter in a few days' time. This marks the end of an important chapter in an almost 15-year-long journey by the CMS crystals team, some of whose member...

  17. Automation in biological crystallization.

    Science.gov (United States)

    Stewart, Patrick Shaw; Mueller-Dieckmann, Jochen

    2014-06-01

    Crystallization remains the bottleneck in the crystallographic process leading from a gene to a three-dimensional model of the encoded protein or RNA. Automation of the individual steps of a crystallization experiment, from the preparation of crystallization cocktails for initial or optimization screens to the imaging of the experiments, has been the response to address this issue. Today, large high-throughput crystallization facilities, many of them open to the general user community, are capable of setting up thousands of crystallization trials per day. It is thus possible to test multiple constructs of each target for their ability to form crystals on a production-line basis. This has improved success rates and made crystallization much more convenient. High-throughput crystallization, however, cannot relieve users of the task of producing samples of high quality. Moreover, the time gained from eliminating manual preparations must now be invested in the careful evaluation of the increased number of experiments. The latter requires a sophisticated data and laboratory information-management system. A review of the current state of automation at the individual steps of crystallization with specific attention to the automation of optimization is given.

  18. Crystallization Formulation Lab

    Data.gov (United States)

    Federal Laboratory Consortium — The Crystallization Formulation Lab fills a critical need in the process development and optimization of current and new explosives and energetic formulations. The...

  19. Institutions as Knowledge Capital

    DEFF Research Database (Denmark)

    Foss, Nicolai Juul; Garzarelli, Giampaolo

    The paper revisits the socioeconomic theory of the Austrian School economist Ludwig M. Lachmann. By showing that the common claim that Lachmann's idiosyncratic (read: eclectic and multidisciplinary) approach to economics entails nihilism is unfounded, it reaches the following conclusions. (1......) Lachmann held a sophisticated institutional position to economics that anticipated developments in contemporary new institutional economics. (2) Lachmann's sociological and economic reading of institutions offers insights for the problem of coordination. (3) Lachmann extends contemporary new institutional...... theory without simultaneously denying the policy approach of comparative institutional analysis. (90 words.)KeywordsComparative institutional analysis, coordination, expectations, institutionalevolution, interpretative institutionalism.JEL CodesB31, B52, B53, D80....

  20. What are Institutional Logics

    DEFF Research Database (Denmark)

    Berg Johansen, Christina; Waldorff, Susanne Boch

    This study presents new insights into the explanatory power of the institutional logics perspective. With outset in a discussion of seminal theory texts, we identify two fundamental topics that frame institutional logics: overarching institutional orders guides by institutional logics, as well...... as change and agency generated by friction between logics. We use these topics as basis for an analysis of selected empirical papers, with the aim of understanding how institutional logics contribute to institutional theory at large, and which social matters institutional logics can and cannot explore...

  1. Thermotropic Ionic Liquid Crystals

    Science.gov (United States)

    Axenov, Kirill V.; Laschat, Sabine

    2011-01-01

    The last five years’ achievements in the synthesis and investigation of thermotropic ionic liquid crystals are reviewed. The present review describes the mesomorphic properties displayed by organic, as well as metal-containing ionic mesogens. In addition, a short overview on the ionic polymer and self-assembled liquid crystals is given. Potential and actual applications of ionic mesogens are also discussed. PMID:28879986

  2. Thermotropic Ionic Liquid Crystals.

    Science.gov (United States)

    Axenov, Kirill V; Laschat, Sabine

    2011-01-14

    The last five years' achievements in the synthesis and investigation of thermotropic ionic liquid crystals are reviewed. The present review describes the mesomorphic properties displayed by organic, as well as metal-containing ionic mesogens. In addition, a short overview on the ionic polymer and self-assembled liquid crystals is given. Potential and actual applications of ionic mesogens are also discussed.

  3. Thermotropic Ionic Liquid Crystals

    OpenAIRE

    Axenov, Kirill V.; Laschat, Sabine

    2011-01-01

    The last five years’ achievements in the synthesis and investigation of thermotropic ionic liquid crystals are reviewed. The present review describes the mesomorphic properties displayed by organic, as well as metal-containing ionic mesogens. In addition, a short overview on the ionic polymer and self-assembled liquid crystals is given. Potential and actual applications of ionic mesogens are also discussed.

  4. Photonic crystal fibers

    DEFF Research Database (Denmark)

    Lægsgaard, Jesper; Hansen, K P; Nielsen, M D

    2003-01-01

    Photonic crystal fibers having a complex microstructure in the transverse plane constitute a new and promising class of optical fibers. Such fibers can either guide light through total internal reflection or the photonic bandgap effect, In this paper, we review the different types and applications...... of photonic crystal fibers with particular emphasis on recent advances in the field....

  5. Tactical Miniature Crystal Oscillator.

    Science.gov (United States)

    1980-08-01

    manufactured by this process are expected to require 30 days to achieve minimum aging rates. (4) FUNDEMENTAL CRYSTAL RETRACE MEASUREMENT. An important crystal...considerable measurement time to detect differences and characterize components. Before investing considerable time in a candidate reactive element, a

  6. Crystals in the LHC

    CERN Multimedia

    Antonella Del Rosso

    2012-01-01

    Bent crystals can be used to deflect charged particle beams. Their use in high-energy accelerators has been investigated for almost 40 years. Recently, a bent crystal was irradiated for the first time in the HiRadMat facility with an extreme particle flux, which crystals would have to withstand in the LHC. The results were very encouraging and confirmed that this technology could play a major role in increasing the beam collimation performance in future upgrades of the machine.   UA9 bent crystal tested with a laser. Charged particles interacting with a bent crystal can be trapped in channelling states and deflected by the atomic planes of the crystal lattice (see box). The use of bent crystals for beam manipulation in particle accelerators is a concept that has been well-assessed. Over the last three decades, a large number of experimental findings have contributed to furthering our knowledge and improving our ability to control crystal-particle interactions. In modern hadron colliders, su...

  7. What are Institutional Logics

    OpenAIRE

    Berg Johansen, Christina; Bock Waldorff, Susanne

    2015-01-01

    This study presents new insights into the explanatory power of the institutional logics perspective. With outset in a discussion of seminal theory texts, we identify two fundamental topics that frame institutional logics: overarching institutional orders guided by institutional logics, as well as change and agency generated by friction between logics. We use these topics as basis for an analysis of selected empirical papers, with the aim of understanding how institutional logics contribute to...

  8. Optically Anomalous Crystals

    CERN Document Server

    Shtukenberg, Alexander; Kahr, Bart

    2007-01-01

    Optical anomalies in crystals are puzzles that collectively constituted the greatest unsolved problems in crystallography in the 19th Century. The most common anomaly is a discrepancy between a crystal’s symmetry as determined by its shape or by X-ray analysis, and that determined by monitoring the polarization state of traversing light. These discrepancies were perceived as a great impediment to the development of the sciences of crystals on the basis of Curie’s Symmetry Principle, the grand organizing idea in the physical sciences to emerge in the latter half of the 19th Century. Optically Anomalous Crystals begins with an historical introduction covering the contributions of Brewster, Biot, Mallard, Brauns, Tamman, and many other distinguished crystallographers. From this follows a tutorial in crystal optics. Further chapters discuss the two main mechanisms of optical dissymmetry: 1. the piezo-optic effect, and 2. the kinetic ordering of atoms. The text then tackles complex, inhomogeneous crystals, and...

  9. Progress on photonic crystals

    CERN Document Server

    Lecoq, P; Gundacker, S; Hillemanns, H; Jarron, P; Knapitsch, A; Leclercq, J L; Letartre, X; Meyer, T; Pauwels, K; Powolny, F; Seassal, C

    2010-01-01

    The renewal of interest for Time of Flight Positron Emission Tomography (TOF PET) has highlighted the need for increasing the light output of scintillating crystals and in particular for improving the light extraction from materials with a high index of refraction. One possible solution to overcome the problem of total internal reflection and light losses resulting from multiple bouncing within the crystal is to improve the light extraction efficiency at the crystal/photodetector interface by means of photonic crystals, i.e. media with a periodic modulation of the dielectric constant at the wavelength scale. After a short reminder of the underlying principles this contribution proposes to present the very encouraging results we have recently obtained on LYSO pixels and the perspectives on other crystals such as BGO, LuYAP and LuAG. These results confirm the impressive predictions from our previously published Monte Carlo simulations. A detailed description of the sample preparation procedure is given as well ...

  10. Organic semiconductor crystals.

    Science.gov (United States)

    Wang, Chengliang; Dong, Huanli; Jiang, Lang; Hu, Wenping

    2018-01-22

    Organic semiconductors have attracted a lot of attention since the discovery of highly doped conductive polymers, due to the potential application in field-effect transistors (OFETs), light-emitting diodes (OLEDs) and photovoltaic cells (OPVs). Single crystals of organic semiconductors are particularly intriguing because they are free of grain boundaries and have long-range periodic order as well as minimal traps and defects. Hence, organic semiconductor crystals provide a powerful tool for revealing the intrinsic properties, examining the structure-property relationships, demonstrating the important factors for high performance devices and uncovering fundamental physics in organic semiconductors. This review provides a comprehensive overview of the molecular packing, morphology and charge transport features of organic semiconductor crystals, the control of crystallization for achieving high quality crystals and the device physics in the three main applications. We hope that this comprehensive summary can give a clear picture of the state-of-art status and guide future work in this area.

  11. Disorder in Protein Crystals.

    Science.gov (United States)

    Clarage, James Braun, II

    1990-01-01

    Methods have been developed for analyzing the diffuse x-ray scattering in the halos about a crystal's Bragg reflections as a means of determining correlations in atomic displacements in protein crystals. The diffuse intensity distribution for rhombohedral insulin, tetragonal lysozyme, and triclinic lysozyme crystals was best simulated in terms of exponential displacement correlation functions. About 90% of the disorder can be accounted for by internal movements correlated with a decay distance of about 6A; the remaining 10% corresponds to intermolecular movements that decay in a distance the order of size of the protein molecule. The results demonstrate that protein crystals fit into neither the Einstein nor the Debye paradigms for thermally fluctuating crystalline solids. Unlike the Einstein model, there are correlations in the atomic displacements, but these correlations decay more steeply with distance than predicted by the Debye-Waller model for an elastic solid. The observed displacement correlations are liquid -like in the sense that they decay exponentially with the distance between atoms, just as positional correlations in a liquid. This liquid-like disorder is similar to the disorder observed in 2-D crystals of polystyrene latex spheres, and similar systems where repulsive interactions dominate; hence, these colloidal crystals appear to provide a better analogy for the dynamics of protein crystals than perfectly elastic lattices.

  12. Photonic Crystals: Physics and Technology

    CERN Document Server

    Sibilia, Concita; Marciniak, Marian; Szoplik, Tomasz

    2008-01-01

    The aim of the work is give an overview of the activity in the field of Photonic Crystal developed in the frame of COST P11 action . The main objective of the COST P11 action was to unify and coordinate national efforts aimed at studying linear and nonlinear optical interactions with Photonic Crystals (PCs), without neglecting an important aspect related to the material research as idea and methods of realizations of 3D PC, together with the development and implementation of measurement techniques for the experimental evaluation of their potential applications in different area, as for example telecommunication with novel optical fibers, lasers, nonlinear multi-functionality, display devices , opto-electronics, sensors. The book contain contributions from authors who gave their lecture at the Cost P11 Training School. Training School was held at the Warsaw University (2007) and National Institute of Telecommunications (May 23), Warsaw. It was attended by 23 students. The focus of the School was on the work of...

  13. Crystals in light.

    Science.gov (United States)

    Kahr, Bart; Freudenthal, John; Gunn, Erica

    2010-05-18

    We have made images of crystals illuminated with polarized light for almost two decades. Early on, we abandoned photosensitive chemicals in favor of digital electrophotometry with all of the attendant advantages of quantitative intensity data. Accurate intensities are a boon because they can be used to analytically discriminate small effects in the presence of larger ones. The change in the form of our data followed camera technology that transformed picture taking the world over. Ironically, exposures in early photographs were presumed to correlate simply with light intensity, raising the hope that photography would replace sensorial interpretation with mechanical objectivity and supplant the art of visual photometry. This was only true in part. Quantitative imaging accurate enough to render the separation of crystalloptical quantities had to await the invention of the solid-state camera. Many pioneers in crystal optics were also major figures in the early history of photography. We draw out the union of optical crystallography and photography because the tree that connects the inventors of photography is a structure unmatched for organizing our work during the past 20 years, not to mention that silver halide crystallites used in chemical photography are among the most consequential "crystals in light", underscoring our title. We emphasize crystals that have acquired optical properties such as linear birefringence, linear dichroism, circular birefringence, and circular dichroism, during growth from solution. Other crystalloptical effects were discovered that are unique to curiously dissymmetric crystals containing embedded oscillators. In the aggregate, dyed crystals constitute a generalization of single crystal matrix isolation. Simple crystals provided kinetic stability to include guests such as proteins or molecules in excited states. Molecular lifetimes were extended for the preparation of laser gain media and for the study of the photodynamics of single

  14. Magnetic ions in crystals

    CERN Document Server

    Stevens, K W

    2014-01-01

    There have been many demonstrations, particularly for magnetic impurity ions in crystals, that spin-Hamiltonians are able to account for a wide range of experimental results in terms of much smaller numbers of parameters. Yet they were originally derived from crystal field theory, which contains a logical flaw; electrons on the magnetic ions are distinguished from those on the ligands. Thus there is a challenge: to replace crystal field theory with one of equal or greater predictive power that is based on a surer footing. The theory developed in this book begins with a generic Hamiltonian, on

  15. Silumins alloy crystallization

    Directory of Open Access Journals (Sweden)

    S. Pietrowski

    2009-07-01

    Full Text Available This paper presents the results of research, by ATD method, of hypo-, near- and hyperutectic silumins crystallization containing the following alloying additives: Mg, Ni, Cu, Cr, Mo, W, V. It has been shown that, depending on their concentration may crystallize pre-eutectic or eutectic multicomponent phases containing these alloy additives. It has been revealed that any subsequent crystallizable phase nucleate and grows near the liquid/former crystallized phase interface. In multiphases compound also falls the silicon, resulting in a reduction in its quantity and the fragmentation in the eutectic mixture. As a result, it gets a high hardness of silumins in terms of 110-220HB.

  16. Hypersonic phononic crystals.

    Science.gov (United States)

    Gorishnyy, T; Ullal, C K; Maldovan, M; Fytas, G; Thomas, E L

    2005-03-25

    In this Letter we propose the use of hypersonic phononic crystals to control the emission and propagation of high frequency phonons. We report the fabrication of high quality, single crystalline hypersonic crystals using interference lithography and show that direct measurement of their phononic band structure is possible with Brillouin light scattering. Numerical calculations are employed to explain the nature of the observed propagation modes. This work lays the foundation for experimental studies of hypersonic crystals and, more generally, phonon-dependent processes in nanostructures.

  17. Genome sequencing for obstetricians & gynaecologists | Kent ...

    African Journals Online (AJOL)

    The medical profession has been waiting for a decade to be invigorated by the sequencing of the human genome, arguably the greatest scientific project ever. The technology has been spectacular but the results of the project have yielded more unexpected results than definitive answers – many about the very nature of our ...

  18. Questioning screening | Kent | Obstetrics and Gynaecology Forum

    African Journals Online (AJOL)

    This article raises new evidence about screening and argues for the evaluation in all screening on a benefits/harms ratio and then the choice being agreed by the care-giver and patient. As the evidence changes, so do our prejudices come under scrutiny. Are we prepared to objectively review our position in the light of new ...

  19. Synchrotron radiation gives insight in smaller and smaller crystals

    International Nuclear Information System (INIS)

    Hintsches, E.

    1983-01-01

    Scientists from the ''Max-Planck-Institut fuer Festkoerperforschung'' in Stuttgart have extended the method of X-ray analysis to study the structure of very small crystals. For the first time a crystal with 6 μm linear dimension has been successfully analysed using the synchrotron radiation from the DESY electron synchrotron at Hamburg. Thus this important method of analysis has been demonstrated to be usefull for structural studies of crystals, which are smaller by a factor of 20 than hitherto. (orig.) [de

  20. Institutional Logics in Action

    DEFF Research Database (Denmark)

    Lounsbury, Michael; Boxenbaum, Eva

    2013-01-01

    This double volume presents state-of-the-art research and thinking on the dynamics of actors and institutional logics. In the introduction, we briefly sketch the roots and branches of institutional logics scholarship before turning to the new buds of research on the topic of how actors engage...... institutional logics in the course of their organizational practice. We introduce an exciting line of new works on the meta-theoretical foundations of logics, institutional logic processes, and institutional complexity and organizational responses. Collectively, the papers in this volume advance the very...... prolific stream of research on institutional logics by deepening our insight into the active use of institutional logics in organizational action and interaction, including the institutional effects of such (inter)actions....

  1. Canadian institute honours Hawking

    Science.gov (United States)

    Durrani, Matin

    2009-11-01

    The Perimeter Institute for Theoretical Physics in Waterloo, Canada, has announced that a major new extension to its campus will be known as the Stephen Hawking Centre. The extension, which is currently being built, is due to open in 2011 and will double the size of the institute. It will also provide a home for the institute's Masters students, the first of whom joined the Perimeter Institute this autumn as part of its Perimeter Scholars international programme.

  2. Crystal Genetics, Inc.

    Science.gov (United States)

    Kermani, Bahram G

    2016-07-01

    Crystal Genetics, Inc. is an early-stage genetic test company, focused on achieving the highest possible clinical-grade accuracy and comprehensiveness for detecting germline (e.g., in hereditary cancer) and somatic (e.g., in early cancer detection) mutations. Crystal's mission is to significantly improve the health status of the population, by providing high accuracy, comprehensive, flexible and affordable genetic tests, primarily in cancer. Crystal's philosophy is that when it comes to detecting mutations that are strongly correlated with life-threatening diseases, the detection accuracy of every single mutation counts: a single false-positive error could cause severe anxiety for the patient. And, more importantly, a single false-negative error could potentially cost the patient's life. Crystal's objective is to eliminate both of these error types.

  3. Diffusion in Coulomb crystals.

    Science.gov (United States)

    Hughto, J; Schneider, A S; Horowitz, C J; Berry, D K

    2011-07-01

    Diffusion in Coulomb crystals can be important for the structure of neutron star crusts. We determine diffusion constants D from molecular dynamics simulations. We find that D for Coulomb crystals with relatively soft-core 1/r interactions may be larger than D for Lennard-Jones or other solids with harder-core interactions. Diffusion, for simulations of nearly perfect body-centered-cubic lattices, involves the exchange of ions in ringlike configurations. Here ions "hop" in unison without the formation of long lived vacancies. Diffusion, for imperfect crystals, involves the motion of defects. Finally, we find that diffusion, for an amorphous system rapidly quenched from Coulomb parameter Γ=175 to Coulomb parameters up to Γ=1750, is fast enough that the system starts to crystalize during long simulation runs. These results strongly suggest that Coulomb solids in cold white dwarf stars, and the crust of neutron stars, will be crystalline and not amorphous.

  4. Bipolarons in nonmetallic crystals

    International Nuclear Information System (INIS)

    Vinetskii, V.L.; Pashitskii, E.A.; Yanchuk, V.A.

    1987-01-01

    The binding energy of a bipolaron in an ionic crystal increases substantially in the case of strong anisotropy of the effective masses of the free carriers of the easy plane type or easy axis type. In the second case the polaron is cigar-like in shape and the coaxial configuration of bipolarons is energetically favorable. In this case a significant gain in the binding energy and in the width of the region of existence of the bipolaron, with respect to the dielectric constant and the magnitude of the electron-phonon interaction constant, compared with an isotropic crystal, is obtained only for quasi-two-dimensional, or layered, and quasi-one-dimensional, or chainlike, crystals. This work shows that a significant gain in the binding energy can be obtained by taking into account the anisotropy of the dielectric constant of the crystal and localization of the electron wave functions in directions perpendicular to the layers and chains of atoms

  5. Liquid Crystal Colloids

    Science.gov (United States)

    Smalyukh, Ivan I.

    2018-03-01

    Colloids are abundant in nature, science, and technology, with examples ranging from milk to quantum dots and the colloidal atom paradigm. Similarly, liquid crystal ordering is important in contexts ranging from biological membranes to laboratory models of cosmic strings and liquid crystal displays in consumer devices. Some of the most exciting recent developments in both of these soft matter fields emerge at their interface, in the fast-growing research arena of liquid crystal colloids. Mesoscale self-assembly in such systems may lead to artificial materials and to structures with emergent physical behavior arising from patterning of molecular order and nano- or microparticles into precisely controlled configurations. Liquid crystal colloids show exceptional promise for new discovery that may impinge on composite material fabrication, low-dimensional topology, photonics, and so on. Starting from physical underpinnings, I review the state of the art in this fast-growing field, with a focus on its scientific and technological potential.

  6. Creep of crystals

    International Nuclear Information System (INIS)

    Poirier, J.-P.

    1988-01-01

    Creep mechanisms for metals, ceramics and rocks, effect of pressure and temperature on deformation processes are considered. The role of crystal defects is analysed, different models of creep are described. Deformation mechanisms maps for different materials are presented

  7. Multinationals and Institutional Competitiveness

    DEFF Research Database (Denmark)

    Hull Kristensen, Peer; Morgan, Glenn

    This article discusses how institutional competitiveness and multinationals are mutually enriching concepts. Seen from the perspective of Multinationals, institutional competitiveness becomes expressed at two levels. At the level of corporate HQs institutional competitiveness proves itself...... competitiveness of Liberal Market Economies and Coordinated Markets Economies under the current competitive regime....

  8. Thermotropic Ionic Liquid Crystals

    Directory of Open Access Journals (Sweden)

    Sabine Laschat

    2011-01-01

    Full Text Available The last five years’ achievements in the synthesis and investigation of thermotropic ionic liquid crystals are reviewed. The present review describes the mesomorphic properties displayed by organic, as well as metal-containing ionic mesogens. In addition, a short overview on the ionic polymer and self-assembled liquid crystals is given. Potential and actual applications of ionic mesogens are also discussed.

  9. Building a crystal palace

    CERN Multimedia

    2007-01-01

    The end-caps of the CMS electromagnetic calorimeter (ECAL) take shape as the first quadrant was completed on Wednesday 3 October. 1831 crystals, organised into five by five blocks named ‘supercrystals’, make up the first quadrant of Dee 1.With the 61,200-crystal barrel of its electromagnetic calorimeter (ECAL) complete, CMS is now building the endcaps, on the tenth anniversary of their initial design. Crystals for the endcaps were the last to be made, so the race is now on to have them all in place and ready for the turn-on of the LHC next year. Assembly of the first of eight quadrants began in June and crystal mounting was completed on Wednesday 3 October. Each crystal is transparent, has a volume just larger than a CERN coffee cup yet weighs a huge 1.5kg. 1831 of these lead tungstate crystals went into the first quadrant from a total 14,648 in the endcaps. The lead and tungsten account for 86% of each crystal’s weight, but as project leader Dave Cockerill expl...

  10. Furthering critical institutionalism

    Directory of Open Access Journals (Sweden)

    Frances Dalton Cleaver

    2015-03-01

    Full Text Available This special issue furthers the study of natural resource management from a critical institutional perspective. Critical institutionalism (CI is a contemporary body of thought that explores how institutions dynamically mediate relationships between people, natural resources and society. It focuses on the complexity of institutions entwined in everyday social life, their historical formation, the interplay between formal and informal, traditional and modern arrangements, and the power relations that animate them. In such perspectives a social justice lens is often used to scrutinise the outcomes of institutional processes. We argue here that critical institutional approaches have potentially much to offer commons scholarship, particularly through the explanatory power of the concept of bricolage for better understanding institutional change.  Critical institutional approaches, gathering momentum over the past 15 years or so, have excited considerable interest but the insights generated from different disciplinary perspectives remain insufficiently synthesised. Analyses emphasising complexity can be relatively illegible to policy-makers, a fact which lessens their reach. This special issue therefore aims to synthesise critical institutional ideas and so to lay the foundation for moving beyond the emergent stage to make meaningful academic and policy impact. In bringing together papers here we define and synthesise key themes of critical institutionalism, outline the concept of institutional bricolage and identity some key challenges facing this school of thought.

  11. Entrepreneurship as institutional change

    DEFF Research Database (Denmark)

    Bjerregaard, Toke; Lauring, Jakob

    2012-01-01

    This paper responds to calls to make more explicit linkages between institutional theory and entrepreneurship research through studies on how entrepreneurs navigate and work with institutions. The research examines the micro-strategies and activities through which small-scale entrepreneurs maneuver...... between and exploit the multiple, potentially contradictory institutional logics of the different spheres in which they operate. While much research has elucidated how institutional entrepreneurs effect change, this study illustrates how effective entrepreneurs managing and exploiting institutional...... contradictions engage simultaneously in practices of maintaining and changing institutions to establish a balance between the poles on which their ventures depend. We illustrate this by two cases of small-scale entrepreneurship bridging institutional contradictions from an ethnographic study conducted under...

  12. From Institutional Change to Experimentalist Institutions

    DEFF Research Database (Denmark)

    Hull Kristensen, Peer; Morgan, Glenn

    2012-01-01

    Institutionalist theory has shown how work and employment relations are shaped by national contexts. Recent developments in these theories have been increasingly concerned with the issue of institutional change. This reflects a shift in the nature of the competitive environment of firms from...... and institutions. In this paper, we emphasize that in the current context of globalization, firms and actors within firms are continuously developing the way in which they organize work and employment to produce goods and services that are competitive in global markets. The paper argues that new market conditions...... lead firms to constant experimentation in work organization as they seek to position themselves within systems of production and innovation that are global in nature. This creates a pressure for institutional change to facilitate the process of firm-level experimentation; it also tends to create...

  13. Institutional Support : Ethiopian Development Research Institute ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    The Ethiopian Development Research Institute (EDRI) was established in 1999 and became operational in 2003 as a semi-autonomous organization accountable to ... International Water Resources Association, in close collaboration with IDRC, is holding a webinar titled “Climate change and adaptive water management: ...

  14. Crystal growth and scintillation properties of selected fluoride crystals for VUV scintillators

    Czech Academy of Sciences Publication Activity Database

    Pejchal, Jan; Fukuda, K.; Yamaji, A.; Yokota, Y.; Kurosawa, S.; Král, Robert; Nikl, Martin; Yoshikawa, A.

    2014-01-01

    Roč. 401, Sep (2014), s. 833-838 ISSN 0022-0248. [International Conference on Crystal Growth and Epitaxy /17./. Warsaw, 11.08.2013-16..08.2013] R&D Projects: GA MŠk LH12150 Institutional support: RVO:68378271 Keywords : vacuum-ultra-violet emission * micro-pulling-down method * barium -lutetium fluoride * erbium fluoride Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 1.698, year: 2014

  15. Texas Heart Institute

    Science.gov (United States)

    ... of seminars and conferences. Resources Texas Heart Institute Journal Scientific Publications Library & Learning Resources Resources for Physicians Fellowships & Residencies School of Perfusion Technology THI Spotlight Check out the ...

  16. Differences in crystallization of two LinB variants from Sphingobium japonicum UT26

    Czech Academy of Sciences Publication Activity Database

    Degtjarik, O.; Chaloupková, R.; Řezáčová, Pavlína; Kutý, M.; Damborský, J.; Smatanová, I.K.

    2013-01-01

    Roč. 69, č. 3 (2013), s. 284-287 ISSN 1744-3091 Institutional support: RVO:68378050 Keywords : protein crystallization * dehalogenase Subject RIV: EB - Genetics ; Molecular Biology Impact factor: 0.568, year: 2013

  17. Photosensitive bent-core liquid crystals based on methyl substituted 3-hydroxybenzoic acid.

    Czech Academy of Sciences Publication Activity Database

    Kohout, M.; Alaasar, M.; Poryvai, A.; Novotná, Vladimíra; Poppe, S.; Tschierske, C.; Svoboda, J.

    2017-01-01

    Roč. 7, č. 57 (2017), s. 35805-35813 ISSN 2046-2069 R&D Projects: GA ČR GA16-12150S Institutional support: RVO:68378271 Keywords : liquid crystals * photosensitivity * bent-core liquid crystals * 3-hydroxybenzoic acid Subject RIV: JJ - Other Materials OBOR OECD: Nano-materials (production and properties) Impact factor: 3.108, year: 2016

  18. Nanotag-enabled photonic crystal fiber as quantitative surface-enhanced Raman scattering optofluidic platform

    Czech Academy of Sciences Publication Activity Database

    Pinkhasova, P.; Chen, H.; Kaňka, Jiří; Mergo, P.; Du, H.

    2015-01-01

    Roč. 106, č. 7 (2015), 0711061-0711064 ISSN 0003-6951 R&D Projects: GA MŠk(CZ) LH11038 Institutional support: RVO:67985882 Keywords : Photonic crystal fibers * Raman scattering * Crystal whiskers Subject RIV: JA - Electronics ; Optoelectronics, Electrical Engineering Impact factor: 3.142, year: 2015

  19. Time crystals: a review

    Science.gov (United States)

    Sacha, Krzysztof; Zakrzewski, Jakub

    2018-01-01

    Time crystals are time-periodic self-organized structures postulated by Frank Wilczek in 2012. While the original concept was strongly criticized, it stimulated at the same time an intensive research leading to propositions and experimental verifications of discrete (or Floquet) time crystals—the structures that appear in the time domain due to spontaneous breaking of discrete time translation symmetry. The struggle to observe discrete time crystals is reviewed here together with propositions that generalize this concept introducing condensed matter like physics in the time domain. We shall also revisit the original Wilczek’s idea and review strategies aimed at spontaneous breaking of continuous time translation symmetry.

  20. Thermodynamics of Crystals

    Science.gov (United States)

    Navrotsky, Alexandra

    Thermodynamics of Crystals is a gold mine of a references bargain with more derivations of useful equations per dollar, or per page, than almost any other book I know. Useful to whom? To the solid state physicist, the solid state chemist working the geophysicist, the rock mechanic, the mineral physicist. Useful for what? For lattice dynamics, crystal potentials, band structure. For elegant, rigorous, and concise derivations of fundamental equations. For comparison of levels of approximation. For some data and physical insights, especially for metals and simple halides. This book is a reissue, with some changes and additions, of a 1970 treatise. It ages well, since the fundamentals do not change.

  1. Photonic Crystal Fibres

    DEFF Research Database (Denmark)

    Bjarklev, Anders Overgaard; Broeng, Jes; Sanchez Bjarklev, Araceli

    Photonic crystal fibres represent one of the most active research areas today in the field of optics. The diversity of applications that may be addressed by these fibres and their fundamental appeal, by opening up the possibility of guiding light in a radically new way compared to conventional...... optical fibres, have spun an interest from almost all areas of optics and photonics. The aim of this book is to provide an understanding of the different types of photonic crystal fibres and to outline some of the many new and exciting applications that these fibres offer. The book is intended for both...

  2. Fundamentals and Optimal Institutions

    DEFF Research Database (Denmark)

    Gonzalez-Eiras, Martin; Harmon, Nikolaj Arpe; Rossi, Martín

    2016-01-01

    of regulatory institutions such as revenue sharing, salary caps or luxury taxes. We show, theoretically and empirically, that these large differences in adopted institutions can be rationalized as optimal responses to differences in the fundamental characteristics of the sports being played. This provides...

  3. Political institutions since 1820

    NARCIS (Netherlands)

    Foldvari, Peter; Buzasi, Katalin

    2014-01-01

    Political institutions determine the degree of freedom people enjoy and their capacity to influence their social and political environment. This chapter provides historical evidence on the evolution of political institutions drawing upon two major research projects: the PolityIV dataset and the

  4. Astrophysical Institute, Potsdam

    Science.gov (United States)

    Murdin, P.

    2000-11-01

    Built upon a tradition of almost 300 years, the Astrophysical Institute Potsdam (AIP) is in an historical sense the successor of one of the oldest astronomical observatories in Germany. It is the first institute in the world which incorporated the term `astrophysical' in its name, and is connected with distinguished scientists such as Karl Schwarzschild and Albert Einstein. The AIP constitutes on...

  5. Discipline as Institutional Maintenance

    DEFF Research Database (Denmark)

    Rasche, Andreas; Hommel, Ulrich; Cornuel, Eric

    Drawing on the case of business school rankings, we study how institutions are maintained and remain persistent despite their contested nature. We argue that rankings as institutions can be maintained through subtle disciplinary practices that freeze power relations in recipient organizations. Ou...

  6. Institutional investor activism : Introduction

    NARCIS (Netherlands)

    Mc Cahery, Joseph; Bratton, William; Bratton, William; McCahery, Joseph A.

    2015-01-01

    The increase in institutional ownership of recent decades has been accompanied by an enhanced role played by institutions in monitoring companies’ corporate governance behaviour. Activist hedge funds and private equity firms have achieved a degree of success in actively shaping the business plans of

  7. Institutional Justification in Frames

    DEFF Research Database (Denmark)

    Baden, Christian; Schultz, Friederike

    consensus. It extents research on framing in mass communication by applying institutional theory and Boltanski and Thévenot’s (2006) theory on justification in order to explain how the success and failure of proposed interpretations depend on the mobilization of accepted social institutions to justify...

  8. On asymptotic isotropy for a hydrodynamic model of liquid crystals

    Czech Academy of Sciences Publication Activity Database

    Dai, M.; Feireisl, Eduard; Rocca, E.; Schimperna, G.; Schonbek, M.E.

    2016-01-01

    Roč. 97, 3-4 (2016), s. 189-210 ISSN 0921-7134 Grant - others:European Research Council(XE) MATHEF(320078) Institutional support: RVO:67985840 Keywords : liquid crystal * Q-tensor description * long-time behavior Subject RIV: BA - General Mathematics Impact factor: 0.933, year: 2016 http://content.iospress.com/articles/asymptotic-analysis/asy1348

  9. On a hyperbolic system arising in liquid crystals modeling

    Czech Academy of Sciences Publication Activity Database

    Feireisl, Eduard; Rocca, E.; Schimperna, G.; Zarnescu, A.

    2018-01-01

    Roč. 15, č. 1 (2018), s. 15-35 ISSN 0219-8916 EU Projects: European Commission(XE) 320078 - MATHEF Institutional support: RVO:67985840 Keywords : dissipative solution * liquid crystal * weak-strong uniqueness Subject RIV: BA - General Mathematics OBOR OECD: Pure mathematics Impact factor: 0.940, year: 2016 https://www.worldscientific.com/doi/abs/10.1142/S0219891618500029

  10. Crystallization and diffraction analysis of thioredoxin reductase from Streptomyces coelicolor

    Czech Academy of Sciences Publication Activity Database

    Koháryová, M.; Brynda, Jiří; Řezáčová, Pavlína; Kollárová, M.

    F67, č. 8 (2011), s. 917-921 ISSN 1744-3091 Institutional research plan: CEZ:AV0Z40550506; CEZ:AV0Z50520514 Keywords : flavoenzymes * potential antibiotic target * crystallization Subject RIV: EB - Genetics ; Molecular Biology Impact factor: 0.506, year: 2011

  11. Crystal growth and characterization of calcium metaborate scintillators

    Czech Academy of Sciences Publication Activity Database

    Fujimoto, Y.; Yanagida, T.; Kawaguchi, N.; Fukuda, K.; Totsuka, D.; Watanabe, K.; Yamazaki, A.; Chani, V.; Nikl, Martin; Yoshikawa, A.

    2013-01-01

    Roč. 703, MAR (2013), s. 7-10 ISSN 0168-9002 Institutional support: RVO:68378271 Keywords : Czochralski method * single crystal * scintillator * calcium metaborate * luminescence Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 1.316, year: 2013

  12. Magnetic structure of URhSi single crystal

    Czech Academy of Sciences Publication Activity Database

    Prokeš, K.; Andreev, Alexander V.; Honda, F.; Sechovský, V.

    2003-01-01

    Roč. 261, - (2003), s. 131-138 ISSN 0304-8853 R&D Projects: GA ČR GA202/02/0739 Institutional research plan: CEZ:AV0Z1010914 Keywords : URhSi single crystal * magnetization * neutron diffraction * magnetic structure determination Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 0.910, year: 2003

  13. Optimization of crystals for applications in dual-readout calorimetry

    Czech Academy of Sciences Publication Activity Database

    Akchurin, N.; Bedeschi, F.; Cardini, A.; Carosi, R.; Ciapetti, G.; Fasoli, M.; Ferrari, R.; Franchino, S.; Fraternali, M.; Gaudio, G.; Hauptman, J.; Incagli, M.; Lacava, F.; La Rotonda, L.; Lee, S.; Livan, M.; Meoni, E.; Nikl, Martin; Pinci, D.; Policicchio, A.; Popescu, S.; Scuri, F.; Sill, A.; Susinno, G.; Vandelli, W.; Vedda, A.; Venturelli, T.; Voena, C.; Volobouev, I.; Wigmans, R.

    2010-01-01

    Roč. 621, 1-3 (2010), 212-221 ISSN 0168-9002 Institutional research plan: CEZ:AV0Z10100521 Keywords : calorimetry * Cherenkov light * High-Z scintillating crystals Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 1.142, year: 2010

  14. New crystal-chemical data for marécottite

    Czech Academy of Sciences Publication Activity Database

    Plášil, Jakub; Škoda, R.

    2015-01-01

    Roč. 79, č. 3 (2015), s. 649-660 ISSN 0026-461X R&D Projects: GA ČR GP13-31276P Institutional support: RVO:68378271 Keywords : marécottite * uranyl sulfate * zippeite group * crystal structure * chemical composition * hydrogen bonds. Subject RIV: DB - Geology ; Mineralogy Impact factor: 2.212, year: 2015

  15. Characterization and crystal structures of new Schiff base macrocyclic compounds

    Czech Academy of Sciences Publication Activity Database

    Khalaji, A.D.; Ghoran, S.H.; Pojarová, Michaela; Dušek, Michal

    2015-01-01

    Roč. 56, č. 7 (2015), s. 1410-1414 ISSN 0022-4766 R&D Projects: GA ČR(CZ) GA14-03276S Institutional support: RVO:68378271 Keywords : synthesis * macrocyclic Schiff base * single crystal structure analysis * spectroscopy Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 0.536, year: 2015

  16. Chiral HPLC and physical characterisation of orthoconic antiferroelectric liquid crystals

    Czech Academy of Sciences Publication Activity Database

    Vojtylová, Terézia; Żurowska, M.; Milewska, K.; Hamplová, Věra; Sýkora, D.

    2016-01-01

    Roč. 43, č. 9 (2016), s. 1244-1250 ISSN 0267-8292 R&D Projects: GA MŠk(CZ) LD14007; GA ČR GA15-02843S Institutional support: RVO:68378271 Keywords : liquid crystals * chiral HPLC * orthoconic antiferroelectric LC Subject RIV: CB - Analytical Chemistry, Separation Impact factor: 2.661, year: 2016

  17. On asymptotic isotropy for a hydrodynamic model of liquid crystals

    Czech Academy of Sciences Publication Activity Database

    Dai, M.; Feireisl, Eduard; Rocca, E.; Schimperna, G.; Schonbek, M.E.

    2016-01-01

    Roč. 97, 3-4 (2016), s. 189-210 ISSN 0921-7134 Grant - others:European Research Council(XE) MATHEF(320078) Institutional support: RVO:67985840 Keywords : liquid crystal * Q-tensor description * long-time behavior Subject RIV: BA - General Mathematics Impact factor: 0.933, year: 2016 http://content.iospress.com/articles/asymptotic- analysis /asy1348

  18. Double minimum creep of single crystal Ni-base superalloys

    Czech Academy of Sciences Publication Activity Database

    WU, X.; Wollgramm, P.; Somsen, C.; Dlouhý, Antonín; Kostka, A.; Eggeler, G.

    2016-01-01

    Roč. 112, JUN (2016), s. 242-260 ISSN 1359-6454 R&D Projects: GA ČR(CZ) GA14-22834S Institutional support: RVO:68081723 Keywords : Single crystal Ni-base superalloys * Primary creep * Transmission electron microscopy * Dislocations * Stacking faults Subject RIV: JG - Metallurgy Impact factor: 5.301, year: 2016

  19. A Double-Crystal Monochromator for Neutron Stress Diffractometry

    Czech Academy of Sciences Publication Activity Database

    Em, V.; Balagurov, A. M.; Glazkov, V. P.; Karpov, I. D.; Mikula, Pavol; Miron, N. F.; Somenkov, V. A.; Sumin, V. V.; Šaroun, Jan; Shushunov, M. N.

    2017-01-01

    Roč. 60, č. 4 (2017), s. 526-532 ISSN 0020-4412 Institutional support: RVO:61389005 Keywords : neutron diffraction * double-crystal * monochromator Subject RIV: BM - Solid Matter Physics ; Magnetism OBOR OECD: Condensed matter physics (including formerly solid state physics, supercond.) Impact factor: 0.437, year: 2016

  20. The crystal structure of the phosphatidylinositol 4-kinase IIalpha

    Czech Academy of Sciences Publication Activity Database

    Bäumlová, Adriana; Chalupská, Dominika; Rozycki, B.; Jovic, M.; Wisniewski, E.; Klíma, Martin; Dubánková, Anna; Kloer, D. P.; Nencka, Radim; Balla, T.; Bouřa, Evžen

    2015-01-01

    Roč. 22, č. 1 (2015), s. 5 ISSN 1211-5894. [Discussions in Structural Molecular Biology. Annual Meeting of the Czech Society for Structural Biology /13./. 19.03.2015-21.03.2015, Nové Hrady] EU Projects: European Commission(XE) 333916 - STARPI4K Institutional support: RVO:61388963 Keywords : PI4K IIalpha * crystal structure Subject RIV: CE - Biochemistry

  1. The Crystal Hotel: A Microfluidic Approach to Biomimetic Crystallization.

    Science.gov (United States)

    Gong, Xiuqing; Wang, Yun-Wei; Ihli, Johannes; Kim, Yi-Yeoun; Li, Shunbo; Walshaw, Richard; Chen, Li; Meldrum, Fiona C

    2015-12-02

    A "crystal hotel" microfluidic device that allows crystal growth in confined volumes to be studied in situ is used to produce large calcite single crystals with predefined crystallographic orientation, microstructure, and shape by control of the detailed physical environment, flow, and surface chemistry. This general approach can be extended to form technologically important, nanopatterned single crystals. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

  2. Changing institutions of knowing

    DEFF Research Database (Denmark)

    Koch, Christian; Bertelsen, Niels Haldor

    2014-01-01

    paper is to analyze enablers and barriers for this institutional change. The vocational education system in Denmark is strongly institutionalised with unions, employerÕs associations and the schools in central roles. Drawing on institutional theory contributions on labour market -, educational......In order to reach the EU 2020 goals for the climate, Danish vocational training units are currently in a process of institutional change triggered by the need of providing energy, and new process competences for the skilled and semiskilled workforce active in construction. The aim of the present...... - and professional institutions, the paper presents a study of institutional work inside and across schools and craft disciplines working in SMEs involved in new building and renovation with an energy aspect. Collaboration between four education committees for carpenters, masons, electricians and plumbers...

  3. Induced defects in neutron irradiated GaN single crystals

    International Nuclear Information System (INIS)

    Park, I. W.; Koh, E. K.; Kim, Y. M.; Choh, S. H.; Park, S. S.; Kim, B. G.; Sohn, J. M.

    2005-01-01

    The local structure of defects in undoped, Si-doped, and neutron irradiated free standing GaN bulk crystals, grown by hydride vapor phase epitaxy, has been investigated by employing Raman scattering and cathodoluminescence. The GaN samples were irradiated to a dose of 2 x 10 17 neutrons in an atomic reactor at Korea Atomic Energy Research Institute. There was no appreciable change in the Raman spectra for undoped GaN samples before and after neutron irradiation. However, a forbidden transition, A 1 (TO) mode, appeared for a neutron irradiated Si-doped GaN crystal. Cathodoluminescence spectrum for the neutron irradiated Si-doped GaN crystal became much more broadened than that for the unirradiated one. The experimental results reveal the generation of defects with locally deformed structure in the wurtzite Si-doped GaN single crystal

  4. Hydrothermally grown zeolite crystals

    International Nuclear Information System (INIS)

    Durrani, S.K.; Qureshi, A.H.; Hussain, M.A.; Qazi, N.K.

    2009-01-01

    The aluminium-deficient and ferrosilicate zeolite-type materials were synthesized by hydrothermal process at 150-170 degree C for various periods of time from the mixtures containing colloidal reactive silica, sodium aluminate, sodium hydroxide, iron nitrate and organic templates. Organic polycation templates were used as zeolite crystal shape modifiers to enhance relative growth rates. The template was almost completely removed from the zeolite specimens by calcination at 550 degree C for 8h in air. Simultaneous thermogravimetric (TG) and differential thermal analysis (DTA) was performed to study the removal of water molecules and the amount of organic template cations occluded inside the crystal pore of zeolite framework. The 12-13% weight loss in the range of (140-560 degree C) was associated with removal of the (C/sub 3/H/sub 7/)/sub 4/ N+ cation and water molecules. X-ray diffraction (XRD) analysis and scanning electron microscope (SEM) techniques were employed to study the structure, morphology and surface features of hydrothermally grown aluminium-deficient and ferrosilicate zeolite-type crystals. In order to elucidate the mode of zeolite crystallization the crystallinity and unit cell parameters of the materials were determined by XRD, which are the function of Al and Fe contents of zeolites. (author)

  5. Poet Lake Crystal Approval

    Science.gov (United States)

    This September 19, 2016 letter from EPA approves the petition from Poet Biorefining-Lake Crystal, regarding non-grandfathered ethanol produced through a dry mill process, qualifying under the Clean Air Act for renewable fuel (D-code 6) RINs under the RFS

  6. Liquid crystal display

    International Nuclear Information System (INIS)

    Takami, K.

    1981-01-01

    An improved liquid crystal display device is described which can display letters, numerals and other necessary patterns in the night time using a minimized amount of radioactive material. To achieve this a self-luminous light source is placed in a limited region corresponding to a specific display area. (U.K.)

  7. Soap Bubbles and Crystals

    Indian Academy of Sciences (India)

    Home; Journals; Resonance – Journal of Science Education; Volume 11; Issue 6. Soap Bubbles and Crystals. Jean E Taylor. General Article Volume 11 Issue 6 June 2006 pp 26-30. Fulltext. Click here to view fulltext PDF. Permanent link: https://www.ias.ac.in/article/fulltext/reso/011/06/0026-0030. Keywords. Soap bubble ...

  8. Agile Photonic Crystals

    Science.gov (United States)

    2011-01-03

    75, pp. 3253-3256, Oct. 1995. [24] F. Benabid, J. C. Knight, and P. S. J. Russell, “Particle levitation and guidance in hollow-core photonic crystal...B. Mizaikoff, “Midinfrared sensors meet nanotechnology: Trace gas sensing with quantum cascade lasers inside photonic band-gap hollow waveguides

  9. The Crystal Set

    Science.gov (United States)

    Greenslade, Thomas B., Jr.

    2014-01-01

    In past issues of this journal, the late H. R. Crane wrote a long series of articles under the running title of "How Things Work." In them, Dick dealt with many questions that physics teachers asked themselves, but did not have the time to answer. This article is my attempt to work through the physics of the crystal set, which I thought…

  10. WORKSHOP: Scintillating crystals

    Energy Technology Data Exchange (ETDEWEB)

    Anon.

    1992-12-15

    Scintillating crystals are one of the big spinoff success stories of particle physics, and from 22-26 September an international workshop in Chamonix in the French Alps looked at the increasing role of these materials in pure and applied science and in industry.

  11. The CMS crystal calorimeter

    CERN Document Server

    Lustermann, W

    2004-01-01

    The measurement of the energy of electrons and photons with very high accuracy is of primary importance far the study of many physics processes at the Large Hadron Collider (LHC), in particular for the search of the Higgs Boson. The CMS experiment will use a crystal calorimeter with pointing geometry, almost covering 4p, as it offers a very good energy resolution. It is divided into a barrel composed of 61200 lead tungstate crystals, two end-caps with 14648 crystals and a pre-shower detector in front of the end-cap. The challenges of the calorimeter design arise from the high radiation environment, the 4 Tesla magnetic eld, the high bunch crossing rate of 40 MHz and the large dynamic range, requiring the development of fast, radiation hard crystals, photo-detectors and readout electronics. An overview of the construction and design of the calorimeter will be presented, with emphasis on some of the details required to meet the demanding performance goals. 19 Refs.

  12. Positrons in ionic crystals

    International Nuclear Information System (INIS)

    Pareja, R.

    1988-01-01

    Positron annihilation experiments in ionic crystals are reviewed and their results are arranged. A discussion about the positron states in these materials is made in the light of these results and the different proposed models. The positronium in alkali halides is specially considered. (Author)

  13. WORKSHOP: Scintillating crystals

    International Nuclear Information System (INIS)

    Anon.

    1992-01-01

    Scintillating crystals are one of the big spinoff success stories of particle physics, and from 22-26 September an international workshop in Chamonix in the French Alps looked at the increasing role of these materials in pure and applied science and in industry

  14. Thermoelectricity in liquid crystals

    Science.gov (United States)

    Mohd Said, Suhana; Nordin, Abdul Rahman; Abdullah, Norbani; Balamurugan, S.

    2015-09-01

    The thermoelectric effect, also known as the Seebeck effect, describes the conversion of a temperature gradient into electricity. A Figure of Merit (ZT) is used to describe the thermoelectric ability of a material. It is directly dependent on its Seebeck coefficient and electrical conductivity, and inversely dependent on its thermal conductivity. There is usually a compromise between these parameters, which limit the performance of thermoelectric materials. The current achievement for ZT~2.2 falls short of the expected threshold of ZT=3 to allow its viability in commercial applications. In recent times, advances in organic thermoelectrics been significant, improving by over 3 orders of magnitude over a period of about 10 years. Liquid crystals are newly investigated as candidate thermoelectric materials, given their low thermal conductivity, inherent ordering, and in some cases, reasonable electrical conductivity. In this work the thermoelectric behaviour of a discotic liquid crystal, is discussed. The DLC was filled into cells coated with a charge injector, and an alignment of the columnar axis perpendicular to the substrate was allowed to form. This thermoelectric behavior can be correlated to the order-disorder transition. A reasonable thermoelectric power in the liquid crystal temperature regime was noted. In summary, thermoelectric liquid crystals may have the potential to be utilised in flexible devices, as a standalone power source.

  15. Chemistry of microporous crystals

    International Nuclear Information System (INIS)

    Inui, Tomoyuki; Namba, Seitaro; Tatsumi, Takashi

    1991-01-01

    This volume contains three papers which are in INIS scope, entitled respectively: 129 Xe-NMR study of the crystallization of SAPO-37, NMR studies of cation localization in zeolites, developments in x-ray and neutron diffraction methods for zeolites. (H.W.). refs.; figs.; tabs

  16. Twinning processes in Cu-Al-Ni martensite single crystals investigated by neutron single crystal diffraction method

    Czech Academy of Sciences Publication Activity Database

    Molnar, P.; Šittner, P.; Novák, V.; Lukáš, Petr

    2008-01-01

    Roč. 481, Sp.Iss.SI (2008), s. 513-517 ISSN 0921-5093 R&D Projects: GA AV ČR IAA100480704 Institutional research plan: CEZ:AV0Z10480505 Keywords : Cu-Al-Ni * single crystals * neutron diffraction Subject RIV: BG - Nuclear, Atomic and Molecular Physics, Colliders Impact factor: 1.806, year: 2008

  17. Electrical properties of molecular crystals

    International Nuclear Information System (INIS)

    Barraud, A.

    1968-01-01

    This literature survey summarizes the electrical properties of molecular crystals: molecular crystal structure, transport and excitation mechanisms of charge-carriers, and differences compared to inorganic semi-conductors. The main results concerning the electrical conductivity of the most-studied molecular crystals are presented, together with the optical and photo-electrical properties of these crystals. Finally the different types of electrical measurements used are reviewed, as well as the limits of each method. (author) [fr

  18. SMEs, Institutions and Performance

    DEFF Research Database (Denmark)

    Jensen, Camilla; Low, Mei Peng

    2013-01-01

    for combining the resource-based theory with an institutions-based approach towards constructing a more practical and empirical oriented analytical framework. After the preliminary discussion and introduction to the different theories used, the authors then take a focus on the analytical framework used to study......This chapter addresses at the outset the topic of SMEs and economic development from an institutions perspective. The authors argue that the transaction cost theory is not helpful towards understanding the role that institutions play for SME performance for several reasons. Instead, they argue...

  19. Optimization of photonic crystal cavities

    DEFF Research Database (Denmark)

    Wang, Fengwen; Sigmund, Ole

    2017-01-01

    We present optimization of photonic crystal cavities. The optimization problem is formulated to maximize the Purcell factor of a photonic crystal cavity. Both topology optimization and air-hole-based shape optimization are utilized for the design process. Numerical results demonstrate...... that the Purcell factor of the photonic crystal cavity can be significantly improved through optimization....

  20. Production of polarizing Heusler crystals

    Energy Technology Data Exchange (ETDEWEB)

    Courtois, P. [Institut Max von Laue - Paul Langevin (ILL), 38 - Grenoble (France)

    1999-11-01

    Heusler crystals simultaneously produce monochromatized and polarized neutrons. However, in the past, it was difficult to produce these crystals. In collaboration with the neutron scattering group of CEA Grenoble and LLB Saclay, the production of high quality Heusler crystals has been established at ILL. (author) 3 refs., 2 figs., 1 tab.

  1. FPG Child Development Institute

    Science.gov (United States)

    ... shows how implicit racial biases are adversely affecting African American students--especially boys... read more Emphasis Areas ... Development, Teaching, and Learning The Frank Porter Graham Child Development Institute will partner with Zero to Three ...

  2. Joint Quantum Institute

    Data.gov (United States)

    Federal Laboratory Consortium — The Joint Quantum Institute (JQI) is pursuing that goal through the work of leading quantum scientists from the Department of Physics of the University of Maryland...

  3. Contributions to institutional matters

    International Nuclear Information System (INIS)

    The papers included in this document deal with the institutional aspects and the legal framework of spent fuel management. The international management and storage of plutonium and spent fuel is addressed. Licensing procedures are discussed

  4. Advanced Transportation Institute 2008.

    Science.gov (United States)

    2009-02-01

    The seventh version of the Advanced Transportation Institute (ATI-08) was conducted in 2008 to encourage high school students to pursue careers in the field of transportation engineering. The University Transportation Center for Alabama partnered wit...

  5. Advanced Transportation Institute 2009.

    Science.gov (United States)

    2009-09-01

    The eighth version of the Advanced Transportation Institute (ATI-09) was conducted in 2009 to encourage high school students to pursue careers in the field of transportation engineering. The University Transportation Center for Alabama partnered with...

  6. Southern Universities Nuclear Institute

    International Nuclear Information System (INIS)

    Anon.

    1977-01-01

    The Southern Universities Nuclear Institute was created in 1961 to provide postgraduate research and teaching facilities for the universities of Cape Town and Stellenbosch. The main research tool is the 6,0 MV Van de Graaff accelerator installed in 1964. Developments and improvements over the years have maintained the Institute's research effectiveness. The work of local research groups has led to a large number of M Sc and doctorate degrees and numerous publications in international journals. Research at the Institute includes front-line studies of basic nuclear and atomic physics, the development and application of nuclear analytical techniques and the application of radioisotope tracers to problems in science, industry and medicine. The Institute receives financial support from the two southern universities, the Department of National Education, the CSIR and the Atomic Energy Board

  7. Institutional profile questionnaire

    International Development Research Centre (IDRC) Digital Library (Canada)

    test

    Public (i.e., independent govt. body, corporate owned by govt., etc.) N.B. If you ... If yes, services threshold amount? ... How long is the procurement process? : ... Information on person authorized to sign financial reports on behalf of institution.

  8. Corruption, Institutions and Regulation

    OpenAIRE

    Michael Breen; Robert Gillanders

    2011-01-01

    We analyze the effects of corruption and institutional quality on the quality of business regulation. Our key findings indicate that corruption negatively aspects the quality of regulation and that general institutional quality is insignificant once corruption is controlled for. These findings hold over a number of specifications which include additional exogenous historical and geographic controls. The findings imply that policy-makers should focus on curbing corruption to improve regulat...

  9. Great Lakes Energy Institute

    Energy Technology Data Exchange (ETDEWEB)

    Alexander, J. Iwan [Case Western Reserve Univ., Cleveland, OH (United States)

    2012-11-18

    The vision of the Great Lakes Energy Institute is to enable the transition to advanced, sustainable energy generation, storage, distribution and utilization through coordinated research, development, and education. The Institute will place emphasis on translating leading edge research into next generation energy technology. The Institute’s research thrusts focus on coordinated research in decentralized power generation devices (e.g. fuel cells, wind turbines, solar photovoltaic devices), management of electrical power transmission and distribution, energy storage, and energy efficiency.

  10. Blogs in cultural institutions

    Directory of Open Access Journals (Sweden)

    Michał Kaczyński

    2013-03-01

    Full Text Available This article discusses examples of three blogs of the National Library, both in terms of their structure and content as highlighting elements that impact on the promotion of both the blog and the institutions they lead. Discussed the advantages of one of Poland’s most popular blogging platforms WordPress. It also presents a short briefings to customize the look of your blog based on WordPress platform needs to actuate the institution.

  11. Narrative and Institutional Economics

    Directory of Open Access Journals (Sweden)

    Vyacheslav V. Volchik

    2017-12-01

    Full Text Available This article addresses a range of questions associated with the occurrence of a new field of study – narrative economics, which is considered in the context of modern institutionalism. Pioneering works of R. Shiller, G. Akerlof and D. Snower spotlighted the importance of analyzing narratives and narrative influence when studying economic processes. In this paper, a qualitative study of narratives is seen through the prism of an answer to the question: «How do prescribed narratives influence institutions and change them? ». Narratives have much in common with institutions since very often, explicitly or implicitly, they contain value judgements about social interactions or normative aspects shaping behavioral patterns. The identification of dominating narratives enables us to understand better how institutions influence economic (social action. Repeated interactions among social actors are structured through understanding and learning the rules. Understanding of social rules comes from the language – we articulate and perceive the rules drawing on common narratives. Narratives and institutions are helpful when actors gain knowledge about various forms of social communication. Digital technologies, mass media and social networking sites facilitate the spread of narratives, values and beliefs; this process is characterized by increasing returns. Studying narratives and institutions is crucial for modern economic theory because it helps to improve qualitative and quantitative methods of analyzing empirical evidence and enables researchers to understand complex economic processes.

  12. Graphene-based photonic crystal

    International Nuclear Information System (INIS)

    Berman, Oleg L.; Boyko, Vladimir S.; Kezerashvili, Roman Ya.; Kolesnikov, Anton A.; Lozovik, Yurii E.

    2010-01-01

    A novel type of photonic crystal formed by embedding a periodic array of constituent stacks of alternating graphene and dielectric discs into a background dielectric medium is proposed. The photonic band structure and transmittance of such photonic crystal are calculated. The graphene-based photonic crystals can be used effectively as the frequency filters and waveguides for the far infrared region of electromagnetic spectrum. Due to substantial suppression of absorption of low-frequency radiation in doped graphene the damping and skin effect in the photonic crystal are also suppressed. The advantages of the graphene-based photonic crystal are discussed.

  13. Liquid crystals in tribology.

    Science.gov (United States)

    Carrión, Francisco-José; Martínez-Nicolás, Ginés; Iglesias, Patricia; Sanes, José; Bermúdez, María-Dolores

    2009-09-18

    Two decades ago, the literature dealing with the possible applications of low molar mass liquid crystals, also called monomer liquid crystals (MLCs), only included about 50 references. Today, thousands of papers, conference reports, books or book chapters and patents refer to the study and applications of MLCs as lubricants and lubricant additives and efforts are made to develop new commercial applications. The development of more efficient lubricants is of paramount technological and economic relevance as it is estimated that half the energy consumption is dissipated as friction. MLCs have shown their ability to form ordered boundary layers with good load-carrying capacity and to lower the friction coefficients, wear rates and contact temperature of sliding surfaces, thus contributing to increase the components service life and to save energy. This review includes the use of MLCs in lubrication, and dispersions of MLCs in conventional polymers (PDMLCs). Finally, new lubricating system composed of MLC blends with surfactants, ionic liquids or nanophases are considered.

  14. Liquid crystal dimers

    CERN Document Server

    Kumar Pal, Santanu

    2017-01-01

    This book covers in-depth discussion of design principles, synthesis and thermal behavior of all types of liquid crystal (LC) dimers. The text presents recent advances in the field of LC dimers consisting of different mesogenic units such as calamitic, discotic and bent-core molecules. It starts with a chapter on the introduction of liquid crystal dimers, including their odd-even behavior, basic classification of dimers and common mesophases in dimers. The text shows how the molecular architectures are being used to develop new materials to study a range of interesting phenomena such as the biaxial nematic phase containing rod-like and disc-like mesogenic units. Finally, the text presents perspectives related to technological relevance of these dimers such as dopants in LC display mixtures exhibiting faster relaxation time, strong flexoelectric coupling and others to effect control over the properties of these materials.

  15. Nonlinear Photonic Crystal Fibers

    DEFF Research Database (Denmark)

    Hansen, Kim Per

    2004-01-01

    Despite the general recession in the global economy and the collapse of the optical telecommunication market, research within specialty fibers is thriving. This is, more than anything else, due to the technology transition from standard all-glass fibers to photonic crystal fibers, which, instead....... The freedom to design the dispersion profile of the fibers is much larger and it is possible to create fibers, which support only a single spatial mode, regardless of wavelength. In comparison, the standard dispersion-shifted fibers are limited by a much lower index-contrast between the core and the cladding...... in 1996, and are today on their way to become the dominating technology within the specialty fiber field. Whether they will replace the standard fiber in the more traditional areas like telecommunication transmission, is not yet clear, but the nonlinear photonic crystal fibers are here to stay....

  16. Liquid crystal colloids

    CERN Document Server

    Muševič, Igor

    2017-01-01

    This book brings together the many concepts and discoveries in liquid crystal colloids contributed over the last twenty years and scattered across numerous articles and book chapters. It provides both a historical overview of the development of the field and a clear perspective on the future applications in photonics. The book covers all phenomena observed in liquid crystal colloids with an emphasis on experimental tools and applications of topology in condensed matter, as well as practical micro-photonics applications. It includes a number of spectacular manifestations of new topological phenomena not found or difficult to observe in other systems. Starting from the early works on nematic colloids, it explains the basics of topological defects in ordered media, charge and winding, and the elastic forces between colloidal particles in nematics. Following a detailed description of experimental methods, such as optical tweezing and particle tracking, the book eases the reader into the theoretical part, which de...

  17. Dosimetry for Crystals Irradiation

    CERN Document Server

    Lecomte, Pierre

    2005-01-01

    Before shipment to CMS, all PbWO4 crystals produced in China are irradiated there with 60 Co , in order to insure that the induced absorption coefficient is within specifications. Acceptance tests at CERNand at ENEA also include irradiation with gamma rays from 60 Co sources. There were initially discrepancies in quoted doses and doserates as well as in induced absorption coefficients. The present work resolves the discrepancies in irradiation measurements and defines common dosimetry methods for consistency checks between irradiation facilities.

  18. Crystals against cancer

    CERN Multimedia

    2009-01-01

    This is a remarkable example of direct technology transfer from particle physics to medicine. Clinical trials have begun in Portugal on a new medical imaging system for the diagnosis of breast cancer, which uses positron emission tomography (PET). The system, developed by a Portuguese consortium in collaboration with CERN and laboratories participating in the Crystal Clear collaboration, will detect even the smallest tumours and thus help avoid unnecessary biopsies.

  19. On crystallization of law

    Directory of Open Access Journals (Sweden)

    Szmodis Jenő

    2014-01-01

    Full Text Available The article introduces the problem of autonomy of law. The paper examines the medieval origins of legal positivism from a historical approach, sketching the main theories concerning the emergence of law, and phrasing some preliminary consideration for a historical and philosophical view of the problem of the birth of law. As a result of reasoning the article suggests some legal historical and human ethological ideas relating to the phenomena of crystallization of the law.

  20. Phononic crystals fundamentals and applications

    CERN Document Server

    Adibi, Ali

    2016-01-01

    This book provides an in-depth analysis as well as an overview of phononic crystals. This book discusses numerous techniques for the analysis of phononic crystals and covers, among other material, sonic and ultrasonic structures, hypersonic planar structures and their characterization, and novel applications of phononic crystals. This is an ideal book for those working with micro and nanotechnology, MEMS (microelectromechanical systems), and acoustic devices. This book also: Presents an introduction to the fundamentals and properties of phononic crystals Covers simulation techniques for the analysis of phononic crystals Discusses sonic and ultrasonic, hypersonic and planar, and three-dimensional phononic crystal structures Illustrates how phononic crystal structures are being deployed in communication systems and sensing systems.

  1. Quartz crystal fabrication facility

    Science.gov (United States)

    Ney, R. J.

    1980-05-01

    The report describes the design and operation of a five chamber, interconnected vacuum system, which is capable of cleaning, plating, and sealing precision quartz crystal units in ceramic flatpack enclosures continuously in a high vacuum environment. The production rate design goal was 200 units per eight hour day. A unique nozzle beam gold deposition source was developed to operate for extended periods of time without reloading. The source puts out a narrow beam of gold typically in the order of 2 1/2 deg included cone angle. Maximum deposition rates are in the order of 400 a/min at 5.5 in. 'throw' distance used. Entrance and exit air lock chambers expedite the material throughput, so that the processing chambers are at high vacuum for extended periods of time. A stainless steel conveyor belt, in conjunction with three vacuum manipulators, transport the resonator components to the various work stations. Individual chambers are normally separated from each other by gate valves. The crystal resonators, mounted in flatpack frames but unplated, are loaded into transport trays in a lid-frame-lid sequency for insertion into the system and exit as completed crystal units. The system utilizes molybdenum coated ball bearings at essentially all friction surfaces. The gold sources and plating mask heads are equipped with elevators and gate valves, so that they can be removed from the system for maintenance without exposing the chambers to atmosphere.

  2. Slotted Photonic Crystal Sensors

    Science.gov (United States)

    Scullion, Mark G.; Krauss, Thomas F.; Di Falco, Andrea

    2013-01-01

    Optical biosensors are increasingly being considered for lab-on-a-chip applications due to their benefits such as small size, biocompatibility, passive behaviour and lack of the need for fluorescent labels. The light guiding mechanisms used by many of them results in poor overlap of the optical field with the target molecules, reducing the maximum sensitivity achievable. This review article presents a new platform for optical biosensors, namely slotted photonic crystals, which provide higher sensitivities due to their ability to confine, spatially and temporally, the optical mode peak within the analyte itself. Loss measurements showed values comparable to standard photonic crystals, confirming their ability to be used in real devices. A novel resonant coupler was designed, simulated, and experimentally tested, and was found to perform better than other solutions within the literature. Combining with cavities, microfluidics and biological functionalization allowed proof-of-principle demonstrations of protein binding to be carried out. Higher sensitivities were observed in smaller structures than possible with most competing devices reported in the literature. This body of work presents slotted photonic crystals as a realistic platform for complete on-chip biosensing; addressing key design, performance and application issues, whilst also opening up exciting new ideas for future study. PMID:23503295

  3. Slotted Photonic Crystal Sensors

    Directory of Open Access Journals (Sweden)

    Andrea Di Falco

    2013-03-01

    Full Text Available Optical biosensors are increasingly being considered for lab-on-a-chip applications due to their benefits such as small size, biocompatibility, passive behaviour and lack of the need for fluorescent labels. The light guiding mechanisms used by many of them results in poor overlap of the optical field with the target molecules, reducing the maximum sensitivity achievable. This review article presents a new platform for optical biosensors, namely slotted photonic crystals, which provide higher sensitivities due to their ability to confine, spatially and temporally, the optical mode peak within the analyte itself. Loss measurements showed values comparable to standard photonic crystals, confirming their ability to be used in real devices. A novel resonant coupler was designed, simulated, and experimentally tested, and was found to perform better than other solutions within the literature. Combining with cavities, microfluidics and biological functionalization allowed proof-of-principle demonstrations of protein binding to be carried out. Higher sensitivities were observed in smaller structures than possible with most competing devices reported in the literature. This body of work presents slotted photonic crystals as a realistic platform for complete on-chip biosensing; addressing key design, performance and application issues, whilst also opening up exciting new ideas for future study.

  4. Discrimination between biological interfaces and crystal-packing contacts

    Directory of Open Access Journals (Sweden)

    Yuko Tsuchiya

    2008-11-01

    Full Text Available Yuko Tsuchiya1, Haruki Nakamura2, Kengo Kinoshita1,31Institute of Medical Science, The University of Tokyo, 4-6-1 Shirokanedai, Minatoku, Tokyo, 108-8639, Japan; 2Institute for Protein Research, Osaka University, 3-2 Yamadaoka, Suita, Osaka, 565-0871, Japan; 3Bioinformatics Research and Development, JST, 4-1-8 Honcho, Kawaguchi, Saitama, 332-0012, JapanAbstract: A discrimination method between biologically relevant interfaces and artificial crystal-packing contacts in crystal structures was constructed. The method evaluates protein-protein interfaces in terms of complementarities for hydrophobicity, electrostatic potential and shape on the protein surfaces, and chooses the most probable biological interfaces among all possible contacts in the crystal. The method uses a discriminator named as “COMP”, which is a linear combination of the complementarities for the above three surface features and does not correlate with the contact area. The discrimination of homo-dimer interfaces from symmetry-related crystal-packing contacts based on the COMP value achieved the modest success rate. Subsequent detailed review of the discrimination results raised the success rate to about 88.8%. In addition, our discrimination method yielded some clues for understanding the interaction patterns in several examples in the PDB. Thus, the COMP discriminator can also be used as an indicator of the “biological-ness” of protein-protein interfaces.Keywords: protein-protein interaction, complementarity analysis, homo-dimer interface, crystal-packing contact, biological interfaces

  5. On dewetting of thin films due to crystallization (crystallization dewetting).

    Science.gov (United States)

    Habibi, Mehran; Rahimzadeh, Amin; Eslamian, Morteza

    2016-03-01

    Drying and crystallization of a thin liquid film of an ionic or a similar solution can cause dewetting in the resulting thin solid film. This paper aims at investigating this type of dewetting, herein termed "crystallization dewetting", using PbI2 dissolved in organic solvents as the model solution. PbI2 solid films are usually used in X-ray detection and lead halide perovskite solar cells. In this work, PbI2 films are fabricated using spin coating and the effect of major parameters influencing the crystallization dewetting, including the type of the solvent, solution concentration, drying temperature, spin speed, as well as imposed vibration on the substrate are studied on dewetting, surface profile and coverage, using confocal scanning laser microscopy. Simplified hydrodynamic governing equations of crystallization in thin films are presented and using a mathematical representation of the process, it is phenomenologically demonstrated that crystallization dewetting occurs due to the absorption and consumption of the solution surrounding a growing crystal. Among the results, it is found that a low spin speed (high thickness), a high solution concentration and a low drying temperature promote crystal growth, and therefore crystallization dewetting. It is also shown that imposed vibration on the substrate can affect the crystal size and crystallization dewetting.

  6. Institutions and Modernity

    Directory of Open Access Journals (Sweden)

    Witold Morawski

    2013-09-01

    Full Text Available Purpose: Modernity consists of many confl icting aspects: It brings many empty promises, yet has resulted in new institutions that create bridges between the values and interests of millions of people who seek freedom, prosperity, quality of life, strengthened democracy and social justice. In this paper I attempt to a gain and loss account against modernity, because institutional rules are not only conducive to cooperative interactions, but to hostile interactions as well. People are not always guided by moral commitment, but rather more often driven by cold calculation or coercion.Methodology: Modernity has at least three defi nitions. The fi rst defi nition is based on ideas that took over the imagination of the era. The second defi nition is based on an analysis of the behavior of people who respond to reason as well as emotion and believe that they act more rationally than their ancestors or the traditional “others”. The third defi nition is the one closest to my heart, consisting of the use of institutional categories. Institutions offer practical ways of connecting ideas and people. The challenge for them is the result of deepening local and national interdependencies, but increasingly often also regional (e.g. European and global. Interdependencies are the result of the scientifi c and technological revolution, global markets, global governance mechanisms, the emergence of new social forces and cultural confl icts (against the background of reconciling identity and differences.Conclusions: The most important task is to identify the mechanisms of complex systems so that people know how to act under conditions of uncertainty, risk and crisis. Hence, the expectations toward institutions often exceed their abilities. Even though new institutions are being created and old ones are being fixed, we are witnessing and participating in, institutional paralysis and the decay (e.g. corruption. In this situation, it is imperative not only to

  7. Developing a bike-sharing program at Kent State University and Kent, Ohio.

    Science.gov (United States)

    2012-01-01

    Sustainable transportation frequently describes the use of non-motorized transportation : sources, primarily walking and bicycling (Toor and Havlick, 2004). Walking is a time : honored method of getting around that most people can easily access. But ...

  8. Unifying the crystallization behavior of hexagonal and square crystals with the phase-field-crystal model

    International Nuclear Information System (INIS)

    Yang Tao; Chen Zheng; Zhang Jing; Wang Yongxin; Lu Yanli

    2016-01-01

    By employing the phase-field-crystal models, the atomic crystallization process of hexagonal and square crystals is investigated with the emphasis on the growth mechanism and morphological change. A unified regime describing the crystallization behavior of both crystals is obtained with the thermodynamic driving force varying. By increasing the driving force, both crystals (in the steady-state) transform from a faceted polygon to an apex-bulged polygon, and then into a symmetric dendrite. For the faceted polygon, the interface advances by a layer-by-layer (LL) mode while for the apex-bulged polygonal and the dendritic crystals, it first adopts the LL mode and then transits into the multi-layer (ML) mode in the later stage. In particular, a shift of the nucleation sites from the face center to the area around the crystal tips is detected in the early growth stage of both crystals and is rationalized in terms of the relation between the crystal size and the driving force distribution. Finally, a parameter characterizing the complex shape change of square crystal is introduced. (paper)

  9. TTI Phase 2 Institutional Support: The Institute of Economic Affairs ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    TTI Phase 2 Institutional Support: The Institute of Economic Affairs, Ghana ... the Institute of Economic Affairs' (IEA-Ghana) role as a credible public policy ... public policy, facilitate private sector-led economic growth, and strengthen democracy.

  10. NUCOR Institute for Life Sciences

    International Nuclear Information System (INIS)

    Anon.

    1984-01-01

    The article discusses the Nucor Institute for Life Sciences. The institute was previously part of Nucor, but is now an autonomous institute of the University of Pretoria. The task of the institute is to promote the application of radioisotopes and radiation techniques in medicine and biology. Research projects of the institute are shortly discussed

  11. John Searle on Institutional Facts

    Directory of Open Access Journals (Sweden)

    m Abdullahi

    2010-09-01

    Here we argue that the essence of institutional facts is status functions. Humans recognize these functions which contain a set of deontic powers through collective intentionality. Therefore, institutional facts are ontologically subjective and epistemologically objective. Nevertheless, objectivity of institutional facts totally depends on language which itself is a fundamental institution for other institutions.

  12. Commercial and Institutional Waste

    DEFF Research Database (Denmark)

    Christensen, Thomas Højlund; Fruergaard, Thilde

    2011-01-01

    Commercial and institutional waste is primarily from retail (stores), hotels, restaurants, health care (except health risk waste), banks, insurance companies, education, retirement homes, public services and transport. Within some of these sectors, e.g. retail and restaurants, large variations...... are found in terms of which products and services are offered. Available data on unit generation rates and material composition as well as determining factors are discussed in this chapter. The characterizing of commercial and institutional waste is faced with the problem that often only a part of the waste...... is handled in the municipal waste system, where information is easily accessible. An important part of commercial and institutional waste is packaging waste, and enterprises with large quantities of clean paper, cardboard and plastic waste may have their own facilities for baling and storing their waste...

  13. International Environmental Institute

    International Nuclear Information System (INIS)

    DiSibio, R.R.

    1992-01-01

    The International Environmental Institute is being established at the Hanford Site to provide training and education in environmental restoration and waste management technologies and to serve as an interface for exchange of information among government laboratories, regional and federal governments, universities, and US industries. Recognized as the flagship of the nation's environmental management effort, the Hanford Site provides a unique living environmental laboratory that represents the most extensive, complex, and diverse cleanup challenges anywhere. An Environmental Institute director has been selected, the organizational structure has been established, and initial phases of operation have begun. The combined resources of the Hanford Site and the Environmental Institute offer unprecedented technological capabilities for dealing with the nation's environmental issues

  14. Institutional control and monitoring

    International Nuclear Information System (INIS)

    Bragg, K.

    2002-01-01

    This paper provides several possible principles to be used to guide future discussions and tries to place the need for institutional control into context for the various waste types. The proposed principles would allow institutional control to be used as one method to provide radiation protection in the future without presenting undue burdens to future generations. It also provides advice on how to apply the proposed principles in a practical manner. The key difference in the approach proposed is that institutional control should be viewed as a need to pass on information, knowledge and skills from one generation to the next. This would allow each successive generation to make its own decision as to whether such controls should be maintained. (author)

  15. Financial institutions as an example of institutions of public trust

    OpenAIRE

    Agata Jakubowska

    2013-01-01

    Financial institutions are commonly known as institutions of public trust and they are fundamental for activities of other economic entities. The level of trust determines the competitive position of financial institutions. That is why care about the best standards is the most important task for these institutions. Financial institutions are called institutions of public trust and thus high professionalism and more responsibility is demanded from them. This article presents basic problems con...

  16. Netherlands Interuniversity Reactor Institut

    International Nuclear Information System (INIS)

    1978-01-01

    This is the annual report of the Interuniversity Reactor Institute in the Netherlands for the Academic Year 1977-78. Activities of the general committee, the daily committee and the scientific advice board are presented. Detailed reports of the scientific studies performed are given under five subjects - radiation physics, reactor physics, radiation chemistry, radiochemistry and radiation hygiene and dosimetry. Summarised reports of the various industrial groups are also presented. Training and education, publications and reports, courses, visits and cooperation with other institutes in the area of scientific research are mentioned. (C.F.)

  17. Legal and institutional issues

    International Nuclear Information System (INIS)

    Anon.

    1991-01-01

    Leaving aside the natural desire to avoid the difficulties imposed by the enormously complex siting and certification process, a utility might decide to forego adding new capacity because of a variety of legal and institutional disincentives. Some of these are discussed in this chapter. The addition of new lines to support a competitive generating market also raises unique institutional issues. Perhaps the most important of these is the question of who should pay for the necessary capital expenditures. This issue also is discussed in this section

  18. Navigating Institutions and Institutional Leadership to Address Sexual Violence

    Science.gov (United States)

    Sisneros, Kathy; Rivera, Monica

    2018-01-01

    Using an institutional example, this chapter offers strategies to effectively navigate institutional culture, processes, and structures to engage the entire campus community in addressing sexual violence.

  19. Crystal structure and magnetic susceptibility of UOSe single crystals

    International Nuclear Information System (INIS)

    Kaczorowski, D.; Muenster Univ.; Poettgen, R.; Jeitschko, W.; Gajek, Z.; Zygmunt, A.

    1993-01-01

    The crystal structure and magnetic susceptibility behaviour of UOSe single crystals have been studied. UOSe crystalizes in the tetragonal PbFC1-type structure (space group P4/nmm) with the lattice parameters: a = 390.38(5) pm and c = 698.05(9) pm. It orders antiferromagnetically at T N =100±2 K and exhibits a very strong anisotropy in the susceptibility vs temperature variation. The magnetic and thermodynamic properties of UOSe are successfully interpreted in the framework of a perturbative ab initio crystal field approach. (Author)

  20. Crystal structure and magnetic susceptibility of UOSe single crystals

    Energy Technology Data Exchange (ETDEWEB)

    Kaczorowski, D. (Polish Academy of Sciences, Wroclaw (Poland). Inst. for Low Temperature and Structure Research Muenster Univ. (Germany). Anorganisch-Chemisches Inst.); Poettgen, R.; Jeitschko, W. (Muenster Univ. (Germany). Anorganisch-Chemisches Inst.); Gajek, Z.; Zygmunt, A. (Polish Academy of Sciences, Wroclaw (Poland). Inst. for Low Temperature and Structure Research)

    1993-01-01

    The crystal structure and magnetic susceptibility behaviour of UOSe single crystals have been studied. UOSe crystalizes in the tetragonal PbFC1-type structure (space group P4/nmm) with the lattice parameters: a = 390.38(5) pm and c = 698.05(9) pm. It orders antiferromagnetically at T[sub N]=100[+-]2 K and exhibits a very strong anisotropy in the susceptibility vs temperature variation. The magnetic and thermodynamic properties of UOSe are successfully interpreted in the framework of a perturbative ab initio crystal field approach. (Author).

  1. Crystallized Schroedinger cat states

    International Nuclear Information System (INIS)

    Castanos, O.; Lopez-Pena, R.; Man'ko, V.I.

    1995-01-01

    Crystallized Schroedinger cat states (male and female) are introduced on the base of extension of group construction for the even and odd coherent states of the electromagnetic field oscillator. The Wigner and Q functions are calculated and some are plotted for C 2 , C 3 , C 4 , C 5 , C 3v Schroedinger cat states. Quadrature means and dispersions for these states are calculated and squeezing and correlation phenomena are studied. Photon distribution functions for these states are given explicitly and are plotted for several examples. A strong oscillatory behavior of the photon distribution function for some field amplitudes is found in the new type of states

  2. Crystal structure of cafenstrole

    Directory of Open Access Journals (Sweden)

    Gihaeng Kang

    2015-08-01

    Full Text Available The title compound (systematic name: N,N-diethyl-3-mesitylsulfonyl-1H-1,2,4-triazole-1-carboxamide, C16H22N4O3S, is a triazole herbicide. The dihedral angle between the planes of the triazole and benzene ring planes is 88.14 (10°. In the crystal, C—H...O hydrogen bonds and weak C—H...π interactions link adjacent molecules, forming one-dimensional chains along the a axis.

  3. Liquid Crystal Airborne Display

    Science.gov (United States)

    1977-08-01

    Cum.nings, J. P., et al., Properties and Limitations oe Liquid Crystals for Aircraft Displays, Honeywell Corporate Researc ."I Center, Final Report HR-72...basic module could be used to build displays for both the commercial and military! 157- marhecs, and so would establi sh a broad and sizable market ... market for the display becomes a reality; therein lies, f TABLE 16 THE COURSE OF FUTURE DISPLAY DEVELOPMENT Today 1976-77 1980 1985 Display Size 2" 1 3.2

  4. Crystal structure of pseudoguainolide

    Directory of Open Access Journals (Sweden)

    Noureddine Beghidja

    2015-03-01

    Full Text Available The lactone ring in the title molecule, C15H22O3 (systematic name: 3,4a,8-trimethyldodecahydroazuleno[6,5-b]furan-2,5-dione, assumes an envelope conformation with the methine C atom adjacent to the the methine C atom carrying the methyl substituent being the flap atom. The other five-membered ring adopts a twisted conformation with the twist being about the methine–methylene C—C bond. The seven-membered ring is based on a twisted boat conformation. No specific interactions are noted in the the crystal packing.

  5. Radiation Damage in Scintillating Crystals

    CERN Document Server

    Zhu Ren Yuan

    1998-01-01

    Crystal Calorimetry in future high energy physics experiments faces a new challenge to maintain its precision in a hostile radiation environment. This paper discusses the effects of radiation damage in scintillating crystals, and concludes that the predominant radiation damage effect in crystal scintillators is the radiation induced absorption, or color center formation, not the loss of the scintillation light yield. The importance of maintaining crystal's light response uniformity and the feasibility to build a precision crystal calorimeter under radiation are elaborated. The mechanism of the radiation damage in scintillating crystals is also discussed. While the damage in alkali halides is found to be caused by the oxygen or hydroxyl contamination, it is the structure defects, such as oxygen vacancies, cause damage in oxides. Material analysis methods used to reach these conclusions are presented in details.

  6. Hopper Growth of Salt Crystals.

    Science.gov (United States)

    Desarnaud, Julie; Derluyn, Hannelore; Carmeliet, Jan; Bonn, Daniel; Shahidzadeh, Noushine

    2018-06-07

    The growth of hopper crystals is observed for many substances, but the mechanism of their formation remains ill understood. Here we investigate their growth by performing evaporation experiments on small volumes of salt solutions. We show that sodium chloride crystals that grow very fast from a highly supersaturated solution form a peculiar form of hopper crystal consisting of a series of connected miniature versions of the original cubic crystal. The transition between cubic and such hopper growth happens at a well-defined supersaturation where the growth rate of the cubic crystal reaches a maximum (∼6.5 ± 1.8 μm/s). Above this threshold, the growth rate varies as the third power of supersaturation, showing that a new mechanism, controlled by the maximum speed of surface integration of new molecules, induces the hopper growth of cubic crystals in cascade.

  7. Institute for Nuclear Theory

    International Nuclear Information System (INIS)

    Haxton, W.; Bertsch, G.; Henley, E.M.

    1993-01-01

    This report briefly discussion the following programs of the Institute for Nuclear Theory: fundamental interactions in nuclei; strangeness in hadrons and nuclei; microscopic nuclear structure theory; nuclear physics in atoms and molecules; phenomenology and lattice QCD; and large amplitude collective motion

  8. Rescaling or Institutional Flexibility?

    DEFF Research Database (Denmark)

    Hansen, Povl Adler; Serin, Göran Folke

    2010-01-01

    -border integration has given rise? Does a process exist whereby the ‘problem' and its solution are readily identified and absorbed by existing institutional structures with actions carried out through ‘selective competence delegation'? Based on two case studies, the integration of the labour market and the creation...

  9. Information for Institutional Renewal.

    Science.gov (United States)

    Spencer, Richard L.

    1979-01-01

    Discusses a planning, management, and evaluation system, an objective-based planning process, research databases, analytical reports, and transactional data as state-of-the-art tools available to generate data which link research directly to planning for institutional renewal. (RC)

  10. Danish Space Research Institute

    International Nuclear Information System (INIS)

    1991-01-01

    The present report presents a description of the activities and finances of the Danish Space Reserach Institute during 1989 and 1990. The research deals with infrared astronomy (ISOPHOT), X-ray astronomy (EXPECT/SODART), hard X-ray astronomy (WATCH), satellite projects and sounding rocket experiments. (CLS)

  11. International institutional law

    CERN Document Server

    Schermers, Henry G

    1972-01-01

    In several respects the present study is an enlargement of a former analysis about the specialized agencies of the United Nations to more organisations and into further detail. In particular the creation of the European Communities, adding new aspects to international institutional law, have received attention.

  12. Institute Born of Gratitude.

    Science.gov (United States)

    McLellan, Vin

    1980-01-01

    The Wang Institute of Graduate Studies plans to offer a master's degree in software engineering. The development of an academic program to produce superior, technically qualified managers for the computer industry's software production is discussed. (Journal availability: Datamation, 666 Fifth Ave., New York, NY 10103.) (MLW)

  13. Colorado Water Institute

    Science.gov (United States)

    Colorado Water Institute Colorado State University header HomeMission StatementGRAD592NewslettersPublications/ReportsCSU Water ExpertsFunding OpportunitiesScholarshipsSubscribeEmploymentAdvisory BoardStaffContact UsCommentsLinks Water Center Logo Water Resources Archive Office of Engagement Ag Water

  14. Global Green Growth Institute

    DEFF Research Database (Denmark)

    Müller, Anders Riel

    2017-01-01

    Har man fulgt historien om Venstres gruppeformand Lars Løkkes rejser på 1. klasse i forbindelse med formandsposten for Global Green Growth Institute (GGGI) er der sikkert nogle der undrer sig over, hvad GGGI er for en størrelse. Medierne præsenterer GGGI som en international klimaorganisation, der...

  15. Crystal growth and optical properties of Gd admixed Ce-doped Lu.sub.2./sub.Si.sub.2./sub.O.sub.7./sub. single crystals

    Czech Academy of Sciences Publication Activity Database

    Horiai, T.; Kurosawa, S.; Murakami, R.; Yamaji, A.; Shoji, Y.; Ohashi, Y.; Pejchal, Jan; Kamada, K.; Yokota, Y.; Yoshikawa, A.

    2017-01-01

    Roč. 468, Jun (2017), s. 391-394 ISSN 0022-0248 Grant - others:AV ČR(CZ) JSPS-17-18 Program:Bilaterální spolupráce Institutional support: RVO:68378271 Keywords : growth from melt * seed crystals * single crystal growth * oxides * scintillator materials Subject RIV: BM - Solid Matter Physics ; Magnetism OBOR OECD: Condensed matter physics (including formerly solid state physics, supercond.) Impact factor: 1.751, year: 2016

  16. Quasimetallic silicon micromachined photonic crystals

    International Nuclear Information System (INIS)

    Temelkuran, B.; Bayindir, Mehmet; Ozbay, E.; Kavanaugh, J. P.; Sigalas, M. M.; Tuttle, G.

    2001-01-01

    We report on fabrication of a layer-by-layer photonic crystal using highly doped silicon wafers processed by semiconductor micromachining techniques. The crystals, built using (100) silicon wafers, resulted in an upper stop band edge at 100 GHz. The transmission and defect characteristics of these structures were found to be analogous to metallic photonic crystals. We also investigated the effect of doping concentration on the defect characteristics. The experimental results agree well with predictions of the transfer matrix method simulations

  17. Conversation analysis and the study of social institutions: methodological, socio-cultural and epistemic considerations

    OpenAIRE

    Roca-Cuberes, Carles

    2014-01-01

    The objective of this study is to show how conversation analysis, a sociological discipline, approaches the study of social institutions. Social institutions are conceived as the crystallization of members’ communicative, interactional practices. Two institutional domains—psychiatric interviews and broadcast news interviews —and a specific interactional practice—‘formulations’—are examined in this study. The results show that (1) in psychiatric interviews the psychiatrist uses formulations to...

  18. Aluminum-air battery crystallizer

    Science.gov (United States)

    Maimoni, A.

    1987-01-01

    A prototype crystallizer system for the aluminum-air battery operated reliably through simulated startup and shutdown cycles and met its design objectives. The crystallizer system allows for crystallization and removal of the aluminium hydroxide reaction product; it is required to allow steady-state and long-term operation of the aluminum-air battery. The system has to minimize volume and maintain low turbulence and shear to minimize secondary nucleation and energy consumption while enhancing agglomeration. A lamella crystallizer satisfies system constraints.

  19. Physical Properties of Liquid Crystals

    CERN Document Server

    Gray, George W; Spiess, Hans W

    1999-01-01

    This handbook is a unique compendium of knowledge on all aspects of the physics of liquid crystals. In over 500 pages it provides detailed information on the physical properties of liquid crystals as well as the recent theories and results on phase transitions, defects and textures of different types of liquid crystals. An in-depth understanding of the physical fundamentals is a prerequisite for everyone working in the field of liquid crystal research. With this book the experts as well as graduate students entering the field get all the information they need.

  20. Wetting of cholesteric liquid crystals.

    Science.gov (United States)

    Silvestre, Nuno M; Figueirinhas Pereira, Maria Carolina; Bernardino, Nelson R; Telo da Gama, Margarida M

    2016-02-01

    We investigate theoretically the wetting properties of cholesteric liquid crystals at a planar substrate. If the properties of substrate and of the interface are such that the cholesteric layers are not distorted, the wetting properties are similar to those of a nematic liquid crystal. If, on the other hand, the anchoring conditions force the distortion of the liquid crystal layers the wetting properties are altered, the free cholesteric-isotropic interface is non-planar and there is a layer of topological defects close to the substrate. These deformations can either promote or hinder the wetting of the substrate by a cholesteric, depending on the properties of the cholesteric liquid crystal.

  1. Preventing Crystal Agglomeration of Pharmaceutical Crystals Using Temperature Cycling and a Novel Membrane Crystallization Procedure for Seed Crystal Generation

    Directory of Open Access Journals (Sweden)

    Elena Simone

    2018-01-01

    Full Text Available In this work, a novel membrane crystallization system was used to crystallize micro-sized seeds of piroxicam monohydrate by reverse antisolvent addition. Membrane crystallization seeds were compared with seeds produced by conventional antisolvent addition and polymorphic transformation of a fine powdered sample of piroxicam form I in water. The membrane crystallization process allowed for a consistent production of pure monohydrate crystals with narrow size distribution and without significant agglomeration. The seeds were grown in 350 g of 20:80 w/w acetone-water mixture. Different seeding loads were tested and temperature cycling was applied in order to avoid agglomeration of the growing crystals during the process. Focused beam reflectance measurement (FBRM; and particle vision and measurement (PVM were used to monitor crystal growth; nucleation and agglomeration during the seeded experiments. Furthermore; Raman spectroscopy was used to monitor solute concentration and estimate the overall yield of the process. Membrane crystallization was proved to be the most convenient and consistent method to produce seeds of highly agglomerating compounds; which can be grown via cooling crystallization and temperature cycling.

  2. Inelastic light scattering in crystals

    Science.gov (United States)

    Sushchinskii, M. M.

    The papers presented in this volume are concerned with a variety of problems in optics and solid state physics, such as Raman scattering of light in crystals and disperse media, Rayleigh and inelastic scattering during phase transitions, characteristics of ferroelectrics in relation to the general soft mode concept, and inelastic spectral opalescence. A group-theory approach is used to classify the vibrational spectra of the crystal lattice and to analyze the properties of idealized crystal models. Particular attention is given to surface vibrational states and to the study of the surface layers of crystals and films by light scattering methods.

  3. Tunable Topological Phononic Crystals

    KAUST Repository

    Chen, Zeguo; Wu, Ying

    2016-01-01

    Topological insulators first observed in electronic systems have inspired many analogues in photonic and phononic crystals in which remarkable one-way propagation edge states are supported by topologically nontrivial band gaps. Such band gaps can be achieved by breaking the time-reversal symmetry to lift the degeneracy associated with Dirac cones at the corners of the Brillouin zone. Here, we report on our construction of a phononic crystal exhibiting a Dirac-like cone in the Brillouin zone center. We demonstrate that simultaneously breaking the time-reversal symmetry and altering the geometric size of the unit cell result in a topological transition that we verify by the Chern number calculation and edge-mode analysis. We develop a complete model based on the tight binding to uncover the physical mechanisms of the topological transition. Both the model and numerical simulations show that the topology of the band gap is tunable by varying both the velocity field and the geometric size; such tunability may dramatically enrich the design and use of acoustic topological insulators.

  4. Crystal growth and doping

    International Nuclear Information System (INIS)

    Paorici, C.

    1980-01-01

    Section 1 contains a self-consistent review of the basic growth features. After a short introduction concerning the driving force acting in a crystallization process, three main topics are broadly discussed: (i) interface kinetics; (ii) transport kinetics, and (iii) growth stability conditions. On point (i), after definition of the nature of interface, using Temkin's model, the growth mechanisms predicted by Burton, Cabrera and Frank (BCF) and bidimensional nucleation theories are fully developed. On points (ii) and (iii), the differential equations of the constitutional (concentration) and thermal fields are presented and discussed in terms of relevant approximations, suitable boundary conditions and limit values expected in order to have growth stability. Section 2 reports various experimental procedures for growing bulk crystals from the melt, from solutions and from the vapour phase. The basic concepts of Section 1 are amply employed for a critical discussion of possibilities, advantages and drawbacks of the methods described. Along the same lines, in Section 3 the principal epitaxial deposition procedures are highlighted. Section 4 contains a brief account of doping and of stoichiometry-defect control procedures. There is a long, carefully chosen list of bibliographical references. (author)

  5. Liquid Crystals in Tribology

    Directory of Open Access Journals (Sweden)

    María-Dolores Bermúdez

    2009-09-01

    Full Text Available Two decades ago, the literature dealing with the possible applications of low molar mass liquid crystals, also called monomer liquid crystals (MLCs, only included about 50 references. Today, thousands of papers, conference reports, books or book chapters and patents refer to the study and applications of MLCs as lubricants and lubricant additives and efforts are made to develop new commercial applications. The development of more efficient lubricants is of paramount technological and economic relevance as it is estimated that half the energy consumption is dissipated as friction. MLCs have shown their ability to form ordered boundary layers with good load-carrying capacity and to lower the friction coefficients, wear rates and contact temperature of sliding surfaces, thus contributing to increase the components service life and to save energy. This review includes the use of MLCs in lubrication, and dispersions of MLCs in conventional polymers (PDMLCs. Finally, new lubricating system composed of MLC blends with surfactants, ionic liquids or nanophases are considered.

  6. Tunable Topological Phononic Crystals

    KAUST Repository

    Chen, Zeguo

    2016-05-27

    Topological insulators first observed in electronic systems have inspired many analogues in photonic and phononic crystals in which remarkable one-way propagation edge states are supported by topologically nontrivial band gaps. Such band gaps can be achieved by breaking the time-reversal symmetry to lift the degeneracy associated with Dirac cones at the corners of the Brillouin zone. Here, we report on our construction of a phononic crystal exhibiting a Dirac-like cone in the Brillouin zone center. We demonstrate that simultaneously breaking the time-reversal symmetry and altering the geometric size of the unit cell result in a topological transition that we verify by the Chern number calculation and edge-mode analysis. We develop a complete model based on the tight binding to uncover the physical mechanisms of the topological transition. Both the model and numerical simulations show that the topology of the band gap is tunable by varying both the velocity field and the geometric size; such tunability may dramatically enrich the design and use of acoustic topological insulators.

  7. Crystal Compton Camera

    Energy Technology Data Exchange (ETDEWEB)

    Ziock, Klaus-Peter [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Braverman, Joshua B. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Harrison, Mark J. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Hornback, Donald Eric [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Fabris, Lorenzo [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Newby, Jason [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

    2013-09-26

    Stand-off detection is one of the most important radiation detection capabilities for arms control and the control of illicit nuclear materials. For long range passive detection one requires a large detector and a means of “seeing through” the naturally occurring and varying background radiation, i.e. imaging. Arguably, Compton imaging is the best approach over much of the emission band suitable for long range detection. It provides not only imaging, but more information about the direction of incidence of each detected gamma-ray than the alternate approach of coded-aperture imaging. The directional information allows one to reduce the background and hence improve the sensitivity of a measurement. However, to make an efficient Compton imager requires localizing and measuring the simultaneous energy depositions when gamma-rays Compton scatter and are subsequently captured within a single, large detector volume. This concept has been demonstrated in semi-conductor detectors (HPGe, CZT, Si) but at ~ $1k/cm3 these materials are too expensive to build the large systems needed for standoff detection. Scintillator detectors, such as NaI(Tl), are two orders of magnitude less expensive and possess the energy resolution required to make such an imager. However, they do not currently have the ability to localize closely spaced, simultaneous energy depositions in a single large crystal. In this project we are applying a new technique that should, for the first time ever, allow cubic-millimeter event localization in a bulk scintillator crystal.

  8. Electron spectroscopy of crystals

    CERN Document Server

    Nemoshkalenko, V V

    1979-01-01

    This book is conceived as a monograph, and represents an up-to-date collection of information concerning the use of the method of X-ray photoelectron spec­ troscopy in the study of the electron structure of crystals, as well as a personal interpretation of the subject by the authors. In a natural way, the book starts in Chapter 1 with a recapitulation of the fundamentals of the method, basic relations, principles of operation, and a com­ parative presentation of the characteristics and performances of the most com­ monly used ESCA instruments (from the classical ones-Varian, McPherson, Hewlett Packard, and IEEE-up to the latest model developed by Professor Siegbahn in Uppsala), and continues with a discussion of some of the difficult problems the experimentalist must face such as calibration of spectra, prepara­ tion of samples, and evaluation of the escape depth of electrons. The second chapter is devoted to the theory of photoemission from crystal­ line solids. A discussion of the methods of Hartree-Fo...

  9. Reconfigurable topological photonic crystal

    Science.gov (United States)

    Shalaev, Mikhail I.; Desnavi, Sameerah; Walasik, Wiktor; Litchinitser, Natalia M.

    2018-02-01

    Topological insulators are materials that conduct on the surface and insulate in their interior due to non-trivial topology of the band structure. The edge states on the interface between topological (non-trivial) and conventional (trivial) insulators are topologically protected from scattering due to structural defects and disorders. Recently, it was shown that photonic crystals (PCs) can serve as a platform for realizing a scatter-free propagation of light waves. In conventional PCs, imperfections, structural disorders, and surface roughness lead to significant losses. The breakthrough in overcoming these problems is likely to come from the synergy of the topological PCs and silicon-based photonics technology that enables high integration density, lossless propagation, and immunity to fabrication imperfections. For many applications, reconfigurability and capability to control the propagation of these non-trivial photonic edge states is essential. One way to facilitate such dynamic control is to use liquid crystals (LCs), which allow to modify the refractive index with external electric field. Here, we demonstrate dynamic control of topological edge states by modifying the refractive index of a LC background medium. Background index is changed depending on the orientation of a LC, while preserving the topology of the system. This results in a change of the spectral position of the photonic bandgap and the topological edge states. The proposed concept might be implemented using conventional semiconductor technology, and can be used for robust energy transport in integrated photonic devices, all-optical circuity, and optical communication systems.

  10. Approaches to Identification of Institutions in Institutional Economics

    Directory of Open Access Journals (Sweden)

    Igor M. Shiriaev

    2017-03-01

    Full Text Available The paper deals with the methodology for identification of institutions from institutional economics perspective. The differences between the perspectives provided by old and new institutional economics are highlighted. These differences are interpreted in the context of compared pragmatist and postpositivist methodologies. This paper applies to the post-positivist approach to the identification of institutions. One example of institution is provided by power-property institution. Identification of this institution in the historical and economic research is based on several theoretical generalizations and supported by array of historical facts. Another example is provided by identification of institution and institutional change in higher education based on discourse analysis and interviews with the main actors. In this paper, the regulatory institutions of higher education are analyzed as well. The concept of power-property institution is extended to the higher education by proposing hypotheses on the functioning of state governing-regulating institution in this sphere. This institution prescribes the actors to behave in accordance with the objectives of public policy, which can only be implemented in the form of bureaucratization of higher education. The paper describes the behavioral regularity generated by an identified institution. Functioning of the governing-regulating institution in higher education is illustrated by examples of behavioral regularities emerging from activities in accordance with this institution. The paper also shows the possibility of falsification of proposed hypothesis.

  11. Structural investigations of Lu.sub.2./sub.O.sub.3./sub. as single crystal and polycrystalline transparent ceramic

    Czech Academy of Sciences Publication Activity Database

    Guzik, M.; Pejchal, Jan; Yoshikawa, A.; Ito, A.; Goto, T.; Siczek, M.; Lis, T.; Boulon, J.

    2014-01-01

    Roč. 14, č. 7 (2014), 3327 -3334 ISSN 1528-7483 Institutional support: RVO:68378271 Keywords : lutetium oxide * structure * crystal growth * ceramics Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 4.891, year: 2014

  12. Proteins and their crystals

    Czech Academy of Sciences Publication Activity Database

    Kutá-Smatanová, Ivana; Hogg, T.; Hilgenfeld, R.; Grandori, R.; Carey, J.; Vácha, František; Štys, D.

    2003-01-01

    Roč. 10, - (2003), s. 30-31 ISSN 1211-5894 R&D Projects: GA MŠk LN00A141; GA ČR GA206/00/D007 Institutional research plan: CEZ:MSM 123100001 Keywords : antiviral proteins Subject RIV: CD - Macromolecular Chemistry

  13. The crystal structure of Pd.sub.3./sub.HgTe.sub.3./sub., the synthetic analogue of temagamite

    Czech Academy of Sciences Publication Activity Database

    Laufek, F.; Vymazalová, A.; Drábek, M.; Dušek, Michal; Navrátil, Jiří; Černošková, E.

    2016-01-01

    Roč. 28, č. 4 (2016), s. 825-834 ISSN 0935-1221 Institutional support: RVO:68378271 ; RVO:61389013 Keywords : temagamite * crystal structure * crystal-structure solution * Pd-Hg telluride Subject RIV: BM - Solid Matter Physics ; Magnetism; CD - Macromolecular Chemistry (UMCH-V) Impact factor: 1.362, year: 2016

  14. Optics of globular photonic crystals

    International Nuclear Information System (INIS)

    Gorelik, V S

    2007-01-01

    The results of experimental and theoretical studies of the optical properties of globular photonic crystals - new physical objects having a crystal structure with the lattice period exceeding considerably the atomic size, are presented. As globular photonic crystals, artificial opal matrices consisting of close-packed silica globules of diameter ∼200 nm were used. The reflection spectra of these objects characterising the parameters of photonic bands existing in these crystals in the visible spectral region are presented. The idealised models of the energy band structure of photonic crystals investigated in the review give analytic dispersion dependences for the group velocity and the effective photon mass in a globular photonic crystal. The characteristics of secondary emission excited in globular photonic crystals by monochromatic and broadband radiation are presented. The results of investigations of single-photon-excited delayed scattering of light observed in globular photonic crystals exposed to cw UV radiation and radiation from a repetitively pulsed copper vapour laser are presented. The possibilities of using globular photonic crystals as active media for lasing in different spectral regions are considered. It is proposed to use globular photonic crystals as sensitive sensors in optoelectronic devices for molecular analysis of organic and inorganic materials by the modern methods of laser spectroscopy. The results of experimental studies of spontaneous and stimulated globular scattering of light are discussed. The conditions for observing resonance and two-photon-excited delayed scattering of light are found. The possibility of accumulation and localisation of the laser radiation energy inside a globular photonic crystal is reported. (review)

  15. Digitalization of daycare institutions

    DEFF Research Database (Denmark)

    Chimirri, Niklas Alexander

    in the intergenerational interaction with as well as the intragenerational interaction among daycare children. To some extent, digital media usage, foremost of tablet computers, has seen a discursive and material normalization across a number Danish daycare institutions before at all clarifying how it could be rendered...... as on situated sociomaterial approaches to critical psychological practice research in order to inquire into possible specificities of digital media device usage: How is this usage similar to and different from interacting via other material-communicative devices in a pedagogical practice? How do digital media......The digitalization of Danish daycare institutions is not only affecting the ways staff is documenting and reporting on its pedagogical work. It also appears to be redefining what pedagogical work itself is about, given the drastic increase in deployment of digital (mobile) media devices...

  16. Transportation Institutional Plan

    Energy Technology Data Exchange (ETDEWEB)

    1986-08-01

    This Institutional Plan is divided into three chapters. Chapter 1 provides background information, discusses the purposes of the Plan and the policy guidance for establishing the transportation system, and describes the projected system and the plans for its integrated development. Chapter 2 discusses the major participants who must interact to build the system. Chapter 3 suggests mechanisms for interaction that will foster wide participation in program planning and implementation and provides a framework for managing and resolving the issues related to development and operation of the transportation system. A list of acronyms and a glossary are included for the reader's convenience. Also included in this Plan are four appendices. Of particular importance is Appendix A, which includes detailed discussion of specific transportation issues. Appendices B, C, and D provide supporting material to assist the reader in understanding the roles of the involved institutions.

  17. Homogeneous group, research, institution

    Directory of Open Access Journals (Sweden)

    Francesca Natascia Vasta

    2014-09-01

    Full Text Available The work outlines the complex connection among empiric research, therapeutic programs and host institution. It is considered the current research state in Italy. Italian research field is analyzed and critic data are outlined: lack of results regarding both the therapeutic processes and the effectiveness of eating disorders group analytic treatment. The work investigates on an eating disorders homogeneous group, led into an eating disorder outpatient service. First we present the methodological steps the research is based on including the strong connection among theory and clinical tools. Secondly clinical tools are described and the results commented. Finally, our results suggest the necessity of validating some more specifical hypothesis: verifying the relationship between clinical improvement (sense of exclusion and painful emotions reduction and specific group therapeutic processes; verifying the relationship between depressive feelings, relapses and transition trough a more differentiated groupal field.Keywords: Homogeneous group; Eating disorders; Institutional field; Therapeutic outcome

  18. INSTITUT KESENIAN MAKASSAR

    Directory of Open Access Journals (Sweden)

    Fahrul Rizal

    2014-12-01

    Full Text Available Development of the value of art and culture in Makassar fading , while the higher the education that is expected to help develop arts and cultural preservation . The number of art enthusiasts are having trouble finding a good college and adequate facilities in Makassar divert them out of the area for study. The main purpose of this paper in order to plan and merancangan Art Institute building located in Makassar, which can accommodate the needs of artists to distribute and develop creativity, the result of design art institute building is located in the subdistrict Tamalanrea location is adjusted with the direction of the located area Spatial education, it is expected that the center will be able to accommodate students in distributing and developing creativity and the provision of facilities that can accommodate the development and preservation of local culture and art according to user requirements in accordance with the planning and design standards that apply.

  19. Institutions and poverty.

    Science.gov (United States)

    Tebaldi, Edinaldo; Mohan, Ramesh

    2010-01-01

    This study utilises eight alternative measures of institutions and the instrumental variable method to examine the impacts of institutions on poverty. The estimates show that an economy with a robust system to control corruption, an effective government, and a stable political system will create the conditions to promote economic growth, minimise income distribution conflicts, and reduce poverty. Corruption, ineffective governments, and political instability will not only hurt income levels through market inefficiencies, but also escalate poverty incidence via increased income inequality. The results also imply that the quality of the regulatory system, rule of law, voice and accountability, and expropriation risk are inversely related to poverty but their effect on poverty is via average income rather than income distribution.

  20. Hospitality and Institutional Meals

    DEFF Research Database (Denmark)

    Justesen, Lise; Strøjer, Anna-Lise

    2017-01-01

    Abstract: There is a growing interest in articulating institutional meal serving practices as a hospitality activity involving host and guest interactions. This study aims to qualify institutional hospitality and meal activities by exploring private hospitality events. The study is based......-structured interview, students reflected on their hospitality experiences. The interviews were transcribed and analyzed using a thematic analysis method. The emerging themes on hospitality activities were identified. It was found that hospitality activities could be characterized as a process where the individual...... was transformed into a guest. Information on purpose of the event and other information given in the invitation were part of this process. Furthermore, hospitality activities could be characterized by blurred host-guest relations and by being able to embrace unexpected events as well. The activities were...

  1. Institute for safety technology

    International Nuclear Information System (INIS)

    1991-01-01

    In the area of nuclear reactor safety studies, the Institute for Safety Technology (STI) concentrated its efforts in analysing experimentally and numerically phenomena which characterize highly-improbable but very severe accidents either for light water or for sodium cooled reactors. In the STI nuclear isle, three new laboratories for waste (PETRA), fusion (ETHEL) and safeguards, (PERLA) activities are approaching completion and have made substantial progress in their licensing procedure. The Institute started activities in the non-nuclear safety research area only a few years ago and has been able this year to present its first significant experimental and theoretical results in the areas of runaway reactions, accidental release of products and their deflagration/detonation. Concerning Reference Methods for the Evaluation of Structure Reliability a better understanding was gained of the nonlinear cyclic and dynamic behaviour of materials and structures by performing experiments and developing constitutive and structural member models leading to the computer simulation of complete structures

  2. Conventions and Institutional Logics

    DEFF Research Database (Denmark)

    Westenholz, Ann

    Two theoretical approaches – Conventions and Institutional Logics – are brought together and the similarities and differences between the two are explored. It is not the intention to combine the approaches, but I would like to open both ‘boxes’ and make them available to each other with the purpose...... of creating a space for dialog. Both approaches were developed in the mid-1980s as a reaction to rational-choice economic theory and collectivistic sociological theory. These two theories were oversimplifying social life as being founded either in actor-micro level analyses or in structure-macro level...... analyses. The theoretical quest of both Conventions and Institutional Logics has been to understand the increasing indeterminacy, uncertainty and ambiguity in people’s lives where a sense of reality, of value, of moral, of feelings is not fixed. Both approaches have created new theoretical insights...

  3. Jakartans, Institutionally Volatile

    Directory of Open Access Journals (Sweden)

    Masaaki OKAMOTO

    2014-01-01

    Full Text Available Jakarta recently has gained even more central political attention in Indonesia since Joko Widodo (Jokowi and Basuki Purnama (Ahok became, respectively, the province’s governor and vice-governor in 2012. They started a series of eye-catching and populist programmes, drawing popular support from not only the people of Jakarta, but also among Indonesians in general. Jokowi is now even the most popular candidate for the presidential election in 2014. Their rise is phenomenal in this sense, but it is understandable if we look at Jakartan voters’ behaviour and the institutional arrangement that leads to it. Jakarta, as the national capital, has a unique arrangement in that the province has no autonomous regency or city. This paper argues that this arrangement causes Jakartans to be more politically volatile and describes how this institutional arrangement was created by analysing the minutes of the meeting to discuss the laws concerning Jakarta Province.

  4. Amine free crystal structure: The crystal structure of d(CGCGCG)2 and methylamine complex crystal

    International Nuclear Information System (INIS)

    Ohishi, Hirofumi; Tsukamoto, Koji; Hiyama, Yoichi; Maezaki, Naoyoshi; Tanaka, Tetsuaki; Ishida, Toshimasa

    2006-01-01

    We succeeded in the crystallization of d(CGCGCG) 2 and methylamine Complex. The crystal was clear and of sufficient size to collect the X-ray crystallographic data up to 1.0 A resolution using synchrotron radiation. As a result of X-ray crystallographic analysis of 2F o - F c map was much clear and easily traced. It is First time monoamine co-crystallizes with d(CGCGCG) 2 . However, methylamine was not found from the complex crystal of d(CGCGCG) 2 and methylamine. Five Mg ions were found around d(CGCGCG) 2 molecules. These Mg ions neutralized the anion of 10 values of the phosphate group of DNA with five Mg 2+ . DNA stabilized only by a metallic ion and there is no example of analyzing the X-ray crystal structure like this. Mg ion stabilizes the conformation of Z-DNA. To use monoamine for crystallization of DNA, we found that we can get only d(CGCGCG) 2 and Mg cation crystal. Only Mg cation can stabilize the conformation of Z-DNA. The method of using the monoamine for the crystallization of DNA can be applied to the crystallization of DNA of long chain of length in the future like this

  5. Institute of physics

    International Nuclear Information System (INIS)

    Anon.

    1975-01-01

    A survey is given of the personnel and activities of the Institute of Physics. Research by staff of the Nuclear Physics Group includes mainly work on heavy ion reactions and investigations of rare earth nuclei. The Elementary Particle Group has studied antineutron and antiproton annihilations, neutral current pions minus and has used the CERN ISRs. The Cosmic Physics Group has used rockets, satellite data and balloons to study the electron and proton precipitation in the upper atmosphere and magnetosphere, and aurorae. (JIW)

  6. Institutional entrepreneurship and agency

    DEFF Research Database (Denmark)

    Weik, E.

    2011-01-01

    of collective entrepreneurship and institutional work to see if they can overcome these incongruities. I conclude that although they can remedy some of the problems, these notions run the risk of describing everything until they describe nothing. In order to limit and enable the entrepreneurship literature...... to discuss agency meaningfully, I argue, it needs to develop analytical frames of agency derived either from existing sociological theories or from further developing its own brand of agency theory. © 2011 Blackwell Publishing Ltd....

  7. The Francis Crick Institute.

    Science.gov (United States)

    Peters, Keith; Smith, Jim

    2017-04-01

    The Francis Crick Institute Laboratory, opened in 2016, is supported by the Medical Research Council, Cancer Research UK, the Wellcome Trust, and University College London, King's College London and Imperial College London. The emphasis on research training and early independence of gifted scientists in a multidisciplinary environment provides unique opportunities for UK medical science, including clinical and translational research. © Royal College of Physicians 2017. All rights reserved.

  8. First institutional congress

    International Nuclear Information System (INIS)

    Coto, Z.; Munoz, J.

    1992-01-01

    They explain the different uses of nuclear energy in a generalize way. The fields included are: intense radiations, tracers, nucleonic galgs. These applications are analyzed basically in the industrial field. They also analyze the present usefulness of these techniques and their expectatives for the future. They suggests that the industrial applications of nuclear energy can be considered within the institutional plans of development of the ITCR. 12 refs

  9. HOLIDAY AS SOCIAL INSTITUTE

    Directory of Open Access Journals (Sweden)

    Galaktionova Nelli Anatolyevna

    2013-05-01

    Full Text Available The article deals with holiday as social institute, stages of its institutionalization, such as emergence of need; formation of general objects and ideology proving them; development of social norms and rules;practical adoption of rules and procedures; establishment sanction system; creation of statuses and role system. On the example of Russian festive tradition the general institutional signs of a holiday are described, it is specified that the majority of holidays are at a stage of cultural symbol search having the behavior code; system of ideas; utilitarian and cultural lines; installations and examples of behavior. Taking into consideration the view of Nelli Galaktionova, we can say, that these principles explain the popularity of the Victory Day Holiday and not stable Russian holiday on the 12-th of June- day of Russia. It is stated that the absence of the ritual prevents the popularity of holiday in society. In the article obvious and latent functions of a holiday as social institute are described - regulatory function, integrative, broadcasting, function of reproduction of the social relations, socializing, educational, guarding, forming the culture, communicative, sociocultural, actable, function of leisure and rest organization, adaptive and compensatory, function of removal of ethical regulations. According to the author of article, the holiday is a basis of formation of national and state and civil identity.

  10. The Morse code effect: A crystal-crystal transformation observed in gel-grown lead (II) oxalate crystals

    Science.gov (United States)

    Lisgarten, J. N.; Marks, J. A.

    2018-05-01

    This paper reports on an unusual crystal-crystal transformation phenomenon, which we have called the Morse Code Effect, based on the change in appearance of lead(II) oxalate crystals grown in agarose gels.

  11. Institutional Investors as Minority Shareholders

    OpenAIRE

    Assaf Hamdani; Yishay Yafeh

    2013-01-01

    We examine the link between minority shareholders' rights and corporate governance by studying institutional investors' voting patterns in a concentrated ownership environment. Institutions rarely vote against insider-sponsored proposals even when the law empowers the minority. Institutions vote against compensation-related proposals more often than against related party transactions even when minority shareholders cannot influence outcomes. Potentially conflicted institutions are more likely...

  12. Endogenous and costly institutional deterrence

    Science.gov (United States)

    David C. Kingsley; Thomas C. Brown

    2014-01-01

    Modern economies rely on central-authority institutions to regulate individual behaviour. Despite the importance of such institutions little is known about their formation within groups. In a public good experiment, groups selected the level of deterrence implemented by the institution, knowing that the administrative costs of the institution rose with the level of...

  13. Institutional Strength in Depth

    International Nuclear Information System (INIS)

    Weightman, M.

    2016-01-01

    Much work has been undertaken in order to identify, learn and implement the lessons from the TEPCO Fukushima Daiichi nuclear accident. These have mainly targeted on engineering or operational lessons. Less attention has been paid to the institutional lessons, although there have been some measures to improve individual peer reviews, particularly by the World Association of Nuclear Operators, and the authoritative IAEA report published in 2015 brought forward several important lessons for regulators and advocated a system approach. The report noted that one of the contributing factors the accident was the tendency of stakeholders not to challenge. Additionally, it reported deficiencies in the regulatory authority and system. Earlier, the root cause of the accident was identified by a Japanese independent parliamentary report as being cultural and institutional. The sum total of the institutions, the safety system, was ineffective. While it is important to address the many technical and operational lessons these may not necessary address this more fundamental lesson, and may not serve to provide robust defences against human or institutional failings over a wide variety of possible events and combinations. The overall lesson is that we can have rigorous and comprehensive safety standards and other tools in place to deliver high levels of safety, but ultimately what is important is the ability of the nuclear safety system to ensure that the relevant institutions diligently and effectively apply those standards and tools — to be robust and resilient. This has led to the consideration of applying the principles of the strength in depth philosophy to a nuclear safety system as a way of providing a framework for developing, assessing, reviewing and improving the system. At an IAEA conference in October 2013, a model was presented for a robust national nuclear safety system based on strength in depth philosophy. The model highlighted three main layers: industry, the

  14. Growing Crystals on the Ceiling.

    Science.gov (United States)

    Christman, Robert A.

    1980-01-01

    Described is a method of studying growing crystals in a classroom utilizing a carrousel projector standing vertically. A saturated salt solution is placed on a slide on the lens of the projector and the heat from the projector causes the water to evaporate and salt to crystalize. (Author/DS)

  15. Photonic-crystal fibers gyroscope

    Directory of Open Access Journals (Sweden)

    Ali Muse Haider

    2015-01-01

    Full Text Available In this paper we proposed to use of a photonic crystal fiber with an inner hollow defect. The use of such fibers is not affected by a material medium on the propagation of optical radiation. Photonic crystal fibers present special properties and capabilities that lead to an outstanding potential for sensing applications

  16. Dipole plasma in molecular crystals

    International Nuclear Information System (INIS)

    Kotel'nikov, Yu.E.; Kochelaev, B.I.

    1976-01-01

    Collective oscillations in a system of electric dipoles of molecular crystals are investigated. It has been proved in the exciton approximation that in an elementary cell of a molecular crystal with one molecule there may exist energy fluctuations of the ''dipole'' plasma, analogous to plasma oscillations in the charged Fermi liquid

  17. Diffraction. Single crystal, magnetic

    International Nuclear Information System (INIS)

    Heger, G.

    1999-01-01

    The analysis of crystal structure and magnetic ordering is usually based on diffraction phenomena caused by the interaction of matter with X-rays, neutrons, or electrons. Complementary information is achieved due to the different character of X-rays, neutrons and electrons, and hence their different interactions with matter and further practical aspects. X-ray diffraction using conventional laboratory equipment and/or synchrotron installations is the most important method for structure analyses. The purpose of this paper is to discuss special cases, for which, in addition to this indispensable part, neutrons are required to solve structural problems. Even though the huge intensity of modern synchrotron sources allows in principle the study of magnetic X-ray scattering the investigation of magnetic structures is still one of the most important applications of neutron diffraction. (K.A.)

  18. Raman study of ? crystals

    Science.gov (United States)

    Pimenta, M. A.; Oliveira, M. A. S.; Bourson, P.; Crettez, J. M.

    1997-09-01

    In this work we present a polarized Raman study of 0953-8984/9/37/020/img7 single crystals for several values of the concentration 0953-8984/9/37/020/img8 made using different scattering geometries. The Raman spectra, composed of broad bands, have been fitted in accordance with a symmetry analysis which allowed us to assign the vibrational modes, and determine their frequencies and damping constants. The results are compatible with an average hexagonal symmetry for the solid solutions with x in the range 0953-8984/9/37/020/img9. In each of the spectra we found two bands at about 590 and 0953-8984/9/37/020/img10, probably associated with the existence of 0953-8984/9/37/020/img11 structures in the solid solutions.

  19. Taub-Nut Crystal

    Science.gov (United States)

    Imazato, Harunobu; Mizoguchi, Shun'ya; Yata, Masaya

    We consider the Gibbons-Hawking metric for a three-dimensional periodic array of multi-Taub-NUT centers, containing not only centers with a positive NUT charge but also ones with a negative NUT charge. The latter are regarded as representing the asymptotic form of the Atiyah-Hitchin metric. The periodic arrays of Taub-NUT centers have close parallels with ionic crystals, where the Gibbons-Hawking potential plays the role of the Coulomb static potential of the ions, and are similarly classified according to their space groups. After a periodic identification and a Z2 projection, the array is transformed by T-duality to a system of NS5-branes with the SU(2) structure, and a further standard embedding yields, though singular, a half-BPS heterotic 5-brane background with warped compact transverse dimensions. A discussion is given on the possibility of probing the singular geometry by two-dimensional gauge theories.

  20. Natural photonic crystals

    Energy Technology Data Exchange (ETDEWEB)

    Vigneron, Jean Pol, E-mail: jean-pol.vigneron@fundp.ac.be [Research Center in Physics of Matter and Radiation (PMR), University of Namur (FUNDP), rue de Bruxelles, 61, B-5000 Namur (Belgium); Simonis, Priscilla [Research Center in Physics of Matter and Radiation (PMR), University of Namur (FUNDP), rue de Bruxelles, 61, B-5000 Namur (Belgium)

    2012-10-15

    Photonic structures appeared in nature several hundred millions years ago. In the living world, color is used for communication and this important function strongly impacts the individual chances of survival as well as the chances to reproduce. This has a statistical influence on species populations. Therefore, because they are involved in evolution, natural color-generating structures are - from some point of view - highly optimized. In this short review, a survey is presented of the development of natural photonic crystal-type structures occurring in insects, spiders, birds, fishes and other marine animals, in plants and more, from the standpoint of light-waves propagation. One-, two-, and three-dimensional structures will be reviewed with selected examples.

  1. Crystal Ball at PEP

    International Nuclear Information System (INIS)

    Bartel, W.; Bulos, F.; Luke, D.; Peck, C.; Strauch, K.

    1975-01-01

    The modifications to the SPEAR version of the Crystal Ball required by the higher energies at PEP are discussed. Since the hadron multiplicity is expected to rise as log s, their average energy must rise. On the other hand, if the hadrons are produced in jets, the low energy part of their spectrum is not heavily depleted. This implies that modifications for high energy particles should not deteriorate low energy performance. An external iron calorimeter for measuring the high energy hadrons, charged and neutral, is considered. To improve the angular resolution on γ's, an active internal converter has been studied, estimates have been made of its expected performance, and difficulties requiring further study have been outlined

  2. Natural photonic crystals

    International Nuclear Information System (INIS)

    Vigneron, Jean Pol; Simonis, Priscilla

    2012-01-01

    Photonic structures appeared in nature several hundred millions years ago. In the living world, color is used for communication and this important function strongly impacts the individual chances of survival as well as the chances to reproduce. This has a statistical influence on species populations. Therefore, because they are involved in evolution, natural color-generating structures are - from some point of view - highly optimized. In this short review, a survey is presented of the development of natural photonic crystal-type structures occurring in insects, spiders, birds, fishes and other marine animals, in plants and more, from the standpoint of light-waves propagation. One-, two-, and three-dimensional structures will be reviewed with selected examples.

  3. Modeling liquid crystal polymeric devices

    Science.gov (United States)

    Gimenez Pinto, Vianney Karina

    The main focus of this work is the theoretical and numerical study of materials that combine liquid crystal and polymer. Liquid crystal elastomers are polymeric materials that exhibit both the ordered properties of the liquid crystals and the elastic properties of rubbers. Changing the order of the liquid crystal molecules within the polymer network can induce shape change. These materials are very valuable for applications such as actuators, sensors, artificial muscles, haptic displays, etc. In this work we apply finite element elastodynamics simulations to study the temperature induced shape deformation in nematic elastomers with complex director microstructure. In another topic, we propose a novel numerical method to model the director dynamics and microstructural evolution of three dimensional nematic and cholesteric liquid crystals. Numerical studies presented in this work are in agreement with experimental observations and provide insight into the design of application devices.

  4. Computational strain gradient crystal plasticity

    DEFF Research Database (Denmark)

    Niordson, Christian Frithiof; Kysar, Jeffrey W.

    2014-01-01

    A numerical method for viscous strain gradient crystal plasticity theory is presented, which incorporates both energetic and dissipative gradient effects. The underlying minimum principles are discussed as well as convergence properties of the proposed finite element procedure. Three problems...... of plane crystal plasticity are studied: pure shear of a single crystal between rigid platens as well as plastic deformation around cylindrical voids in hexagonal close packed and face centered cubic crystals. Effective in-plane constitutive slip parameters for plane strain deformation of specifically...... oriented face centered cubic crystals are developed in terms of the crystallographic slip parameters. The effect on geometrically necessary dislocation structures introduced by plastic deformation is investigated as a function of the ratio of void radius to plasticity length scale....

  5. General crystal in prebiotic context

    International Nuclear Information System (INIS)

    Simon, I.

    1993-09-01

    General crystal is an extension of the crystal concept to any form of matter which exhibit neighbour structure determination. This extension makes many results of solid state physics applicable to heterogeneous matter. Among other it includes the description of phase transition from random to unique structure. The advantage of the general crystal approach is demonstrated on globular protein, on of the most important macromolecules of life, which are capable to adopt unique 3D structure spontaneously, regardless of the heterogeneous character of their chemical structure and conformation. It is suggested that the use of general crystal concept may help to find candidates among heterogeneous matters capable to spontaneous self-organization in the same way as crystallization results in unique structure of homogeneous matter, and to apply some of the results of solid state physics to describe the phase transition and other behaviour of this matter. (author). 10 refs

  6. Bacterial Ice Crystal Controlling Proteins

    Science.gov (United States)

    Lorv, Janet S. H.; Rose, David R.; Glick, Bernard R.

    2014-01-01

    Across the world, many ice active bacteria utilize ice crystal controlling proteins for aid in freezing tolerance at subzero temperatures. Ice crystal controlling proteins include both antifreeze and ice nucleation proteins. Antifreeze proteins minimize freezing damage by inhibiting growth of large ice crystals, while ice nucleation proteins induce formation of embryonic ice crystals. Although both protein classes have differing functions, these proteins use the same ice binding mechanisms. Rather than direct binding, it is probable that these protein classes create an ice surface prior to ice crystal surface adsorption. Function is differentiated by molecular size of the protein. This paper reviews the similar and different aspects of bacterial antifreeze and ice nucleation proteins, the role of these proteins in freezing tolerance, prevalence of these proteins in psychrophiles, and current mechanisms of protein-ice interactions. PMID:24579057

  7. Crystallization of glycine with ultrasound

    DEFF Research Database (Denmark)

    Louhi-Kultanen, Marjatta; Karjalainen, Milja; Rantanen, Jukka

    2006-01-01

    Sonocrystallization has proved to be an efficient tool to influence the external appearance and structure of a crystalline product obtained by various crystallization methods. The present work focuses on high intensity sonocrystallization of glycine by varying amplitude of ultrasound with an ultr...... ultrasound power. This study also showed, the higher the ultrasound amplitude the smaller the crystals obtained.......Sonocrystallization has proved to be an efficient tool to influence the external appearance and structure of a crystalline product obtained by various crystallization methods. The present work focuses on high intensity sonocrystallization of glycine by varying amplitude of ultrasound...... with an ultrasound frequency of 20kHz at two temperature ranges 40-50 and 20-30 degrees C in a jacketed 250-ml cooling crystallizer equipped with a stirrer. The polymorph composition of the obtained crystals was analyzed with a temperature variable X-ray powder diffractometer (XRPD). XRPD results showed that...

  8. Springer Handbook of Crystal Growth

    CERN Document Server

    Dhanaraj, Govindhan; Prasad, Vishwanath; Dudley, Michael

    2010-01-01

    Over the years, many successful attempts have been made to describe the art and science of crystal growth. Most modern advances in semiconductor and optical devices would not have been possible without the development of many elemental, binary, ternary, and other compound crystals of varying properties and large sizes. The objective of the Springer Handbook of Crystal Growth is to present state-of-the-art knowledge of both bulk and thin-film crystal growth. The goal is to make readers understand the basics of the commonly employed growth processes, materials produced, and defects generated. Almost 100 leading scientists, researchers, and engineers from 22 different countries from academia and industry have been selected to write chapters on the topics of their expertise. They have written 52 chapters on the fundamentals of bulk crystal growth from the melt, solution, and vapor, epitaxial growth, modeling of growth processes and defects, techniques of defect characterization as well as some contemporary specia...

  9. Growth of emerald single crystals

    International Nuclear Information System (INIS)

    Bukin, G.V.; Godovikov, A.A.; Klyakin, V.A.; Sobolev, V.S.

    1986-01-01

    In addition to its use for jewelry, emerald can also be used in low-noise microwave amplifiers. The authors discuss flux crystallization of emerald and note that when emerald is grown by this method, it is desirable to use solvents which dissolve emerald with minimum deviations from congruence but at the same time with sufficient high efficiency. Emerald synthesis and crystal growth from slowly cooled solutions is discussed as another possibility. The techniques are examined. Vapor synthesis and growht of beryl crystals re reviewed and the authors experimentally study the seeded CVD crystallization of beryl from BeO, Al 2 O 3 and SiO 2 oxides, by using complex compounds as carrier agents. The color of crystals of emerald and other varieties of beryl is detemined by slelective light absorption in teh visible part of the spectrum and depends on the density and structural positions of chromphore ions: chromium, iron, vanadium, nickel, manganese and cobalt

  10. MyCrystals - a simple visual data management program for laboratory-scale crystallization experiments

    DEFF Research Database (Denmark)

    Løvgreen, Monika Nøhr; Løvgreen, Mikkel; Christensen, Hans Erik Mølager

    2009-01-01

    MyCrystals is designed as a user-friendly program to display crystal images and list crystallization conditions. The crystallization conditions entry fields can be customized to suit the experiments. MyCrystals is also able to sort the images by the entered crystallization conditions, which...

  11. Taking Stock on Institutional Entrepreneurship

    DEFF Research Database (Denmark)

    Leca, Bernard; Battilana, Julie; Boxenbaum, Eva

    2006-01-01

    This paper analyzes the literature that has been published on institutional entrepreneurship since Paul DiMaggio introduced this notion in 1988. Based on a systematic selection and analysis of articles, the paper outlines an emerging consensus on the definition and process of institutional entrep...... may use this paper to build targeted and sophisticated research designs that add value to the emerging body of literature on institutional entrepreneurship.Keywords: Institutional Entrepreneur, Institutional Change, Paradox of Embedded Agency...

  12. A macroscopic model for magnetic shape-memory single crystals

    Czech Academy of Sciences Publication Activity Database

    Bessoud, A. L.; Kružík, Martin; Stefanelli, U.

    2013-01-01

    Roč. 64, č. 2 (2013), s. 343-359 ISSN 0044-2275 R&D Projects: GA AV ČR IAA100750802; GA ČR GAP201/10/0357 Institutional support: RVO:67985556 Keywords : magnetostriction * evolution Subject RIV: BA - General Mathematics Impact factor: 1.214, year: 2013 http://library.utia.cas.cz/separaty/2012/MTR/kruzik-a macroscopic model for magnetic shape- memory single crystals.pdf

  13. Crystal structure of the uranyl-oxide mineral rameauite

    Czech Academy of Sciences Publication Activity Database

    Plášil, Jakub; Škoda, R.; Čejka, J.; Bourgoin, V.; Boulliard, J.C.

    2016-01-01

    Roč. 28, č. 5 (2016), s. 959-967 ISSN 0935-1221 R&D Projects: GA MŠk LO1603 EU Projects: European Commission(XE) CZ.2.16/3.1.00/24510 Institutional support: RVO:68378271 Keywords : rameauite * uranyl-oxide hydroxy-hydrate * crystal structure * Raman spectrum Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 1.362, year: 2016

  14. Proteins and their crystals

    Czech Academy of Sciences Publication Activity Database

    Kutá-Smatanová, Ivana; Hogg, T.; Hilgenfeld, R.; Grandori, R.; Carey, J.; Vácha, František; Štys, Dalibor

    2003-01-01

    Roč. 10, č. 1 (2003), s. 31-32 ISSN 1211-5894 R&D Projects: GA MŠk LN00A141; GA ČR GA206/00/D007 Institutional research plan: CEZ:AV0Z5051902; CEZ:MSM 123100001 Keywords : pokeweed antiviral protein * flavodoxin-like protein * PSII Subject RIV: EB - Genetics ; Molecular Biology

  15. Student Augmentation for Crystal Growth Research

    National Research Council Canada - National Science Library

    Prasad, V

    1999-01-01

    ... intelligent modeling, design and control of crystal growth processes. One doctoral student worked on integrating the radiation heat transfer model into MASTRAPP, the crystal growth model developed by the Consortium for Crystal Growth Research...

  16. Effects of impurities on crystal growth in fructose crystallization

    Science.gov (United States)

    Chu, Y. D.; Shiau, L. D.; Berglund, K. A.

    1989-10-01

    The influence of impurities on the crystallization of anhydrous fructose from aqueous solution was studied. The growth kinetics of fructose crystals in the fructose-water-glucose and fructose-water-difructose dianhydrides systems were investigated using photomicroscopic contact nucleation techniques. Glucose is the major impurity likely to be present in fructose syrup formed during corn wet milling, while several difructose dianhydrides are formed in situ under crystallization conditions and have been proposed as a cause in the decrease of overall yields. Both sets of impurities were found to cause inhibition of crystal growth, but the mechanisms responsible in each case are different. It was found that the presence of glucose increases the solubility of fructose in water and thus lowers the supersaturation of the solution. This is probably the main effect responsible for the decrease of crystal growth. Since the molecular structures of difructose dianhydrides are similar to that of fructose, they are probably "tailor-made" impurities. The decrease of crystal growth is probably caused by the incorporation of these impurities into or adsorption to the crystal surface which would accept fructose molecules in the orientation that existed in the difructose dianhydride.

  17. Nanoparticles in liquid crystals, and liquid crystals in nanoparticles

    Science.gov (United States)

    de Pablo, Juan

    2015-03-01

    Liquid crystals are remarkably sensitive to interfacial interactions. Small perturbations at a liquid crystal interface, for example, can be propagated over relatively long length scales, thereby providing the basis for a wide range of applications that rely on amplification of molecular events into macroscopic observables. Our recent research efforts have focused on the reverse phenomenon; that is, we have sought to manipulate the interfacial assembly of nanoparticles or the organization of surface active molecules by controlling the structure of a liquid crystal. This presentation will consist of a review of the basic principles that are responsible for liquid crystal-mediated interactions, followed by demonstrations of those principles in the context of two types of systems. In the first, a liquid crystal is used to direct the assembly of nanoparticles; through a combination of molecular and continuum models, it is found that minute changes in interfacial energy and particle size lead to liquid-crystal induced attractions that can span multiple orders of magnitude. Theoretical predictions are confirmed by experimental observations, which also suggest that LC-mediated assembly provides an effective means for fabrication of plasmonic devices. In the second type of system, the structure of a liquid crystal is controlled by confinement in submicron droplets. The morphology of the liquid crystal in a drop depends on a delicate balance between bulk and interfacial contributions to the free energy; that balance can be easily perturbed by adsorption of analytes or nanoparticles at the interface, thereby providing the basis for development of hierarchical assembly of responsive, anisotropic materials. Theoretical predictions also indicate that the three-dimensional order of a liquid crystal can be projected onto a two-dimensional interface, and give rise to novel nanostructures that are not found in simple isotropic fluids.

  18. How institutions matter for international business : Institutional distance effects vs institutional profile effects

    NARCIS (Netherlands)

    van Hoorn, Andre; Maseland, Robbert

    Extant institutional research has failed to make a distinction between the effects of institutional profile and institutional distance on MNEs. The problem stems from the fact that, due to the use of a single reference country, variation in institutional distance between the reference country and

  19. Institute annual report 2004

    International Nuclear Information System (INIS)

    2005-01-01

    The mission of the ITU (Institute for Transuranium Elements) is to protect the European citizen against risk associated with the handling and storage of highly radioactive elements. The JRC (Joint Research Center) provide customer-driven scientific and technical support for the conception, development, implementation and monitoring of EU policies. In this framework this annual report presents the TU actions in: basic actinide research, spent fuel characterization, safety of nuclear fuels, partitioning and transmutation, alpha-immunotherapy/radiobiology, measurement of radioactivity in the environment, safeguards research and development. (A.L.B.)

  20. Spaceborne Photonics Institute

    Science.gov (United States)

    Venable, D. D.; Farrukh, U. O.; Han, K. S.; Hwang, I. H.; Jalufka, N. W.; Lowe, C. W.; Tabibi, B. M.; Lee, C. J.; Lyons, D.; Maclin, A.

    1994-01-01

    This report describes in chronological detail the development of the Spaceborne Photonics Institute as a sustained research effort at Hampton University in the area of optical physics. This provided the research expertise to initiate a PhD program in Physics. Research was carried out in the areas of: (1) modelling of spaceborne solid state laser systems; (2) amplified spontaneous emission in solar pumped iodine lasers; (3) closely simulated AM0 CW solar pumped iodine laser and repeatedly short pulsed iodine laser oscillator; (4) a materials spectroscopy and growth program; and (5) laser induced fluorescence and atomic and molecular spectroscopy.

  1. Institute annual report 2004

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2005-07-01

    The mission of the ITU (Institute for Transuranium Elements) is to protect the European citizen against risk associated with the handling and storage of highly radioactive elements. The JRC (Joint Research Center) provide customer-driven scientific and technical support for the conception, development, implementation and monitoring of EU policies. In this framework this annual report presents the TU actions in: basic actinide research, spent fuel characterization, safety of nuclear fuels, partitioning and transmutation, alpha-immunotherapy/radiobiology, measurement of radioactivity in the environment, safeguards research and development. (A.L.B.)

  2. Positional Concerns and Institutions

    DEFF Research Database (Denmark)

    Landes, Xavier

    2013-01-01

    that invoking envy or subjective well-being is not fully satisfying for regulating positional concerns. More compelling reasons seem, in complement with efficiency, to be related to considerations for equality. In other words, if institutions could have strong reasons to pay attention to and regulate positional...... their implications for economics, positional concerns imply important normative dimensions. There have been presumed to be a symptom of envy, reduce people’s happiness, and create problems of social interaction or economic inefficiencies. Individuals are, for instance, prone to pick states of the world that improve...... concerns, it would be in virtue of their impact on the social product and individuals’ conditions of living....

  3. Institute for Sustainable Energy

    Energy Technology Data Exchange (ETDEWEB)

    Agrawal, Ajay [Univ. of Alabama, Tuscaloosa, AL (United States)

    2016-03-28

    Alternate fuels offer unique challenges and opportunities as energy source for power generation, vehicular transportation, and industrial applications. Institute for Sustainable Energy (ISE) at UA conducts innovative research to utilize the complex mix of domestically-produced alternate fuels to achieve low-emissions, high energy-efficiency, and fuel-flexibility. ISE also provides educational and advancement opportunities to students and researchers in the energy field. Basic research probing the physics and chemistry of alternative fuels has generated practical concepts investigated in a burner and engine test platforms.

  4. Photonics of liquid-crystal structures: A review

    Energy Technology Data Exchange (ETDEWEB)

    Palto, S. P., E-mail: palto@online.ru; Blinov, L M; Barnik, M I; Lazarev, V V; Umanskii, B A; Shtykov, N M [Russian Academy of Sciences, Shubnikov Institute of Crystallography (Russian Federation)

    2011-07-15

    The original results of studies of the electro-optical and laser effects which have been performed at the Laboratory of Liquid Crystals of the Institute of Crystallography, Russian Academy of Sciences, over the last few years are reviewed. Cholesteric liquid crystals as vivid representatives of photonic structures and their behavior in an electric field are considered in detail. The formation of higher harmonics in the periodic distribution of the director field in a helical liquid crystal structure and, correspondingly, the new (anharmonic) mode of electro-optical effects are discussed. Another group of studies is devoted to bistable light switching by an electric field in chiral nematics. Polarization diffraction gratings controlled by an electric field are also considered. The results of studies devoted to microlasers on various photonic structures with cholesteric and nematic liquid crystals are considered in detail. Particular attention is given to the new regime: leaky-mode lasing. Designs of liquid crystal light amplifiers and their polarization, field, and spectral characteristics are considered in the last section.

  5. Draft Transportation Institutional Plan

    International Nuclear Information System (INIS)

    1985-09-01

    The Department of Energy recognizes that the success of its program to develop and implement a national system for nuclear waste management and disposal depends on broad-based public understanding and acceptance. While each program element has its particular sensitivity, the transportation of the waste may potentially affect the greatest number of people, and accordingly is highly visible and potentially issue-laden. Therefore, the Office of Civilian Radioactive Waste Management has developed this Transportation Institutional Plan to lay the foundation for interaction among all interested parties for the purpose of identifying and resolving issues of concern. The Plan is divided into four chapters. Chapter 1 provides bachground information and discusses the purpose of the Plan and the policy guidance for establishing the transportation system. Chapter 2 introduces the major participants who must interact to build both the system itself and the consensus philosophy that is essential for effective operations. Chapter 3 suggests mechanisms for interaction that will ensure wide participation in program planning and implementation. And, finally, Chapter 4 suggests a framework for managing and resolving the issues related to development and operation of the transportation system. A list of acronyms and a glossary are included for the reader's convenience. The Plan's appendices provide supporting material to assist the reader in understanding the roles of the involved institutions. 4 figs., 1 tab

  6. CRIS and Institutional Repositories

    Directory of Open Access Journals (Sweden)

    A Asserson

    2010-04-01

    Full Text Available CRIS (Current Research Information Systems provide researchers, research managers, innovators, and others with a view over the research activity of a domain. IRs (institutional repositories provide a mechanism for an organisation to showcase through OA (open access its intellectual property. Increasingly, organizations are mandating that their employed researchers deposit peer-reviewed published material in the IR. Research funders are increasingly mandating that publications be deposited in an open access repository: some mandate a central (or subject-based repository, some an IR. In parallel, publishers are offering OA but replacing subscription-based access with author (or author institution payment for publishing. However, many OA repositories have metadata based on DC (Dublin Core which is inadequate; a CERIF (Common-European Research Information Format CRIS provides metadata describing publications with formal syntax and declared semantics thus facilitating interoperation or homogeneous access over heterogeneous sources. The formality is essential for research output metrics, which are increasingly being used to determine future funding for research organizations.

  7. Experimental Study of Electronic Quantum Interference, Photonic Crystal Cavity, Photonic Band Edge Effects for Optical Amplification

    Science.gov (United States)

    2016-01-26

    AFRL-RV-PS- AFRL-RV-PS- TR-2016-0003 TR-2016-0003 EXPERIMENTAL STUDY OF ELECTRONIC QUANTUM INTERFERENCE , PHOTONIC CRYSTAL CAVITY, PHOTONIC BAND...EDGE EFFECTS FOR OPTICAL AMPLIFICATION Shawn-Yu Lin Rensselaer Polytechnic Institute 110 8th Street Troy, New York 12180 26 Jan 2016 Final Report...2014 – 11 Jan 2016 4. TITLE AND SUBTITLE Experimental Study of Electronic Quantum Interference , Photonic Crystal Cavity, Photonic Band Edge Effects

  8. Deuteron NMR resolved mesogen vs. crosslinker molecular order and reorientational exchange in liquid single crystal elastomers

    Czech Academy of Sciences Publication Activity Database

    Milavec, J.; Domenici, V.; Zupančič, B.; Rešetič, A.; Bubnov, Alexej; Zalar, B.

    2016-01-01

    Roč. 18, č. 5 (2016), s. 4071-4077 ISSN 1463-9076 R&D Projects: GA ČR GA15-02843S; GA MŠk(CZ) LD14007 Grant - others:EU - ICT(XE) COST Action IC1208 Institutional support: RVO:68378271 Keywords : liquid single crystal elastomer * NMR * liquid crystal * molecular order * monomers Subject RIV: JJ - Other Materials Impact factor: 4.123, year: 2016

  9. Dichroic Liquid Crystal Displays

    Science.gov (United States)

    Bahadur, Birendra

    The following sections are included: * INTRODUCTION * DICHROIC DYES * Chemical Structure * Chemical and Photochemical Stability * THEORETICAL MODELLING * DEFECTS CAUSED BY PROLONGED LIGHT IRRADIATION * CHEMICAL STRUCTURE AND PHOTOSTABILITY * OTHER PARAMETERS AFFECTING PHOTOSTABILITY * CELL PREPARATION * DICHROIC PARAMETERS AND THEIR MEASUREMENTS * Order Parameter and Dichroic Ratio Of Dyes * Absorbance, Order Parameter and Dichroic Ratio Measurements * IMPACT OF DYE STRUCTURE AND LIQUID CRYSTAL HOST ON PHYSICAL PROPERTIES OF A DICHROIC MIXTURE * Order Parameter and Dichroic Ratio * EFFECT OF LENGTH OF DICHROIC DYES ON THE ORDER PARAMETER * EFFECT OF THE BREADTH OF DYE ON THE ORDER PARAMETER * EFFECT OF THE HOST ON THE ORDER PARAMETER * TEMPERATURE VARIATION OF THE ORDER PARAMETER OF DYES IN A LIQUID CRYSTAL HOST * IMPACT OF DYE CONCENTRATION ON THE ORDER PARAMETER * Temperature Range * Viscosity * Dielectric Constant and Anisotropy * Refractive Indices and Birefringence * solubility43,153-156 * Absorption Wavelength and Auxochromic Groups * Molecular Engineering of Dichroic Dyes * OPTICAL, ELECTRO-OPTICAL AND LIFE PARAMETERS * Colour And CIE Colour space120,160-166 * CIE 1931 COLOUR SPACE * CIE 1976 CHROMATICITY DIAGRAM * CIE UNIFORM COLOUR SPACES & COLOUR DIFFERENCE FORMULAE120,160-166 * Electro-Optical Parameters120 * LUMINANCE * CONTRAST AND CONTRAST RATIO * SWITCHING SPEED * Life Parameters and Failure Modes * DICHROIC MIXTURE FORMULATION * Monochrome Mixture * Black Mixture * ACHROMATIC BLACK MIXTURE FOR HEILMEIER DISPLAYS * Effect of Illuminant on Display Colour * Colour of the Field-On State * Effect of Dye Linewidth * Optimum Centroid Wavelengths * Effect of Dye Concentration * Mixture Formulation Using More Than Three Dyes * ACHROMATIC MIXTURE FOR WHITE-TAYLOR TYPE DISPLAYS * HEILMEIER DISPLAYS * Theoretical Modelling * Threshold Characteristic * Effects of Dye Concentration on Electro-optical Parameters * Effect of Cholesteric Doping * Effect of Alignment

  10. Pressure sensor using liquid crystals

    Science.gov (United States)

    Parmar, Devendra S. (Inventor); Holmes, Harlan K. (Inventor)

    1994-01-01

    A pressure sensor includes a liquid crystal positioned between transparent, electrically conductive films (18 and 20), that are biased by a voltage (V) which induces an electric field (E) that causes the liquid crystal to assume a first state of orientation. Application of pressure (P) to a flexible, transparent film (24) causes the conductive film (20) to move closer to or farther from the conductive film (18), thereby causing a change in the electric field (E'(P)) which causes the liquid crystal to assume a second state of orientation. Polarized light (P.sub.1) is directed into the liquid crystal and transmitted or reflected to an analyzer (A or 30). Changes in the state of orientation of the liquid crystal induced by applied pressure (P) result in a different light intensity being detected at the analyzer (A or 30) as a function of the applied pressure (P). In particular embodiments, the liquid crystal is present as droplets (10) in a polymer matrix (12) or in cells (14) in a polymeric or dielectric grid (16) material in the form of a layer (13) between the electrically conductive films (18 and 20). The liquid crystal fills the open wells in the polymer matrix (12) or grid (16) only partially.

  11. Spatial filtering with photonic crystals

    Energy Technology Data Exchange (ETDEWEB)

    Maigyte, Lina [Departament de Física i Enginyeria Nuclear, Universitat Politècnica de Catalunya, Rambla Sant Nebridi 22, Terrassa 08222 (Spain); Staliunas, Kestutis [Departament de Física i Enginyeria Nuclear, Universitat Politècnica de Catalunya, Rambla Sant Nebridi 22, Terrassa 08222 (Spain); Institució Catalana de Recerca i Estudis Avançats (ICREA), Pg. Lluís Companys 23, Barcelona 08010 (Spain)

    2015-03-15

    Photonic crystals are well known for their celebrated photonic band-gaps—the forbidden frequency ranges, for which the light waves cannot propagate through the structure. The frequency (or chromatic) band-gaps of photonic crystals can be utilized for frequency filtering. In analogy to the chromatic band-gaps and the frequency filtering, the angular band-gaps and the angular (spatial) filtering are also possible in photonic crystals. In this article, we review the recent advances of the spatial filtering using the photonic crystals in different propagation regimes and for different geometries. We review the most evident configuration of filtering in Bragg regime (with the back-reflection—i.e., in the configuration with band-gaps) as well as in Laue regime (with forward deflection—i.e., in the configuration without band-gaps). We explore the spatial filtering in crystals with different symmetries, including axisymmetric crystals; we discuss the role of chirping, i.e., the dependence of the longitudinal period along the structure. We also review the experimental techniques to fabricate the photonic crystals and numerical techniques to explore the spatial filtering. Finally, we discuss several implementations of such filters for intracavity spatial filtering.

  12. Crystal ball single event display

    International Nuclear Information System (INIS)

    Grosnick, D.; Gibson, A.; Allgower, C.; Alyea, J.; Argonne National Lab., IL

    1997-01-01

    The Single Event Display (SED) is a routine that is designed to provide information graphically about a triggered event within the Crystal Ball. The SED is written entirely in FORTRAN and uses the CERN-based HICZ graphing package. The primary display shows the amount of energy deposited in each of the NaI crystals on a Mercator-like projection of the crystals. Ten different shades and colors correspond to varying amounts of energy deposited within a crystal. Information about energy clusters is displayed on the crystal map by outlining in red the thirteen (or twelve) crystals contained within a cluster and assigning each cluster a number. Additional information about energy clusters is provided in a series of boxes containing useful data about the energy distribution among the crystals within the cluster. Other information shown on the event display include the event trigger type and data about π o 's and η's formed from pairs of clusters as found by the analyzer. A description of the major features is given, along with some information on how to install the SED into the analyzer

  13. Crystallization of copper metaphosphate glass

    Science.gov (United States)

    Bae, Byeong-Soo; Weinberg, Michael C.

    1993-01-01

    The effect of the valence state of copper in copper metaphosphate glass on the crystallization behavior and glass transition temperature has been investigated. The crystallization of copper metaphosphate is initiated from the surface and its main crystalline phase is copper metaphosphate (Cu(PO)3),independent of the (Cu sup 2+)/(Cu(total)). However, the crystal morphology, the relative crystallization rates, and their temperature dependences are affected by the (Cu sup 2+)/(Cu (total)) ratio in the glass. On the other hand, the totally oxidized glass crystallizes from all over the surface. The relative crystallization rate of the reduced glass to the totally oxidized glass is large at low temperature, but small at high temperature. The glass transition temperature of the glass increases as the (Cu sup 2+)/(Cu(total)) ratio is raised. It is also found that the atmosphere used during heat treatment does not influence the crystallization of the reduced glass, except for the formation of a very thin CuO surface layer when heated in air.

  14. Crystallization in polydisperse colloidal suspensions

    International Nuclear Information System (INIS)

    Martin, S.; Bryant, G.; Van Megen, W.

    2004-01-01

    Full text: Crystallization and glass formation in colloidal hard spheres has been a very active area of research over the last 15-20 years. For most of this time particle polydispersity has been considered to be a minor concern in these studies. However, over the last few years an increasing number of simulations, theoretical work and experiments have shown that consideration of the polydispersity is critical in understanding these phenomena. In this paper we provide an overview of recent crystallization studies on particles with two very different particle size distributions. These particles exhibit very different equilibrium crystal structures and crystallization kinetics. Based on these measurements and time lapse photographs, we propose a growth mechanism whereby crystallization occurs in conjunction with a local fractionation process near the crystal-fluid interface, which significantly alters the kinetics of crystallite nucleation and growth. This fractionation effect becomes more significant as polydispersity or skewness increases. The unusual crystal structures observed are explained using a schematic model that explains the structure in terms of stacks of planes, which are unregistered due to a high incidence of stacking faults caused by the incorporation of a large number of small particles

  15. INSTITUTIONAL REPOSITORY: EMPLOYMENT IN EDUCATION

    Directory of Open Access Journals (Sweden)

    Vasyl P. Oleksyuk

    2012-11-01

    Full Text Available The article investigated the concept of «institutional repository» and determined the aspects of institutional repositories in higher education. Institutional Repositories are information systems that allow preserving, storing and disseminating scientific knowledge produced in higher education and scientific research institutions. This study presented the main aspects using institutional repositories in educational process (such as storage of scientific and educational information, means of organization activity of students, object of studying. This article produced the structure of communities and collections of the institutional. It is described the experience of implementing of DSpace in the learning process.

  16. Institutional failures and transaction costs of Bulgarian private research institutes

    OpenAIRE

    Nozharov, Shteryo

    2016-01-01

    The paper analyses the reasons for poor performance of private research institutes in Bulgaria. In this regard the Institutional Economics methods are used. A connection between smart growth policy goals and Bulgarian membership in EU is made. The gaps in the institutional environment are identified as well as measures for their elimination are proposed. The main accent of the study is put on the identification of transaction costs, arisen as a result of the failures of the institutional envi...

  17. Changes in copper sulfate crystal habit during cooling crystallization

    Science.gov (United States)

    Giulietti, M.; Seckler, M. M.; Derenzo, S.; Valarelli, J. V.

    1996-09-01

    The morphology of technical grade copper(II) sulfate pentahydrate crystals produced from batch cooling experiments in the temperature range of 70 to 30°C is described and correlated with the process conditions. A slow linear cooling rate (batch time of 90 min) predominantly caused the appearance of well-formed crystals. Exponential cooling (120 min) resulted in the additional formation of agglomerates and twins. The presence of seeds for both cooling modes led to round crystals, agglomerates and twins. Fast linear cooling (15 min) gave rise to a mixture of the former types. Broken crystals and adhering fragments were often found. Growth zoning was pronounced in seeded and linear cooling experiments. Fluid inclusions were always found and were more pronounced for larger particles. The occurrence of twinning, zoning and fluid inclusions was qualitatively explained in terms of fundamental principles.

  18. Neutron scattering experiments of the ionic crystal deformed plastically with uniaxial compression under high temperature

    Energy Technology Data Exchange (ETDEWEB)

    Tsuchiya, Yoshinori; Minakawa, Nobuaki; Aizawa, Kazuya; Ozawa, Kunio [Japan Atomic Energy Research Inst., Tokai, Ibaraki (Japan). Tokai Research Establishment

    1996-04-01

    As an aim of huge growth of alkali halide (AH) single crystal, a mosaic structure of small size AH single crystal deformed plastically with uniaxial compression under high temperature was evaluated due to its neutron irradiation experiment. Using TAS-2 installed at JRR-3M guide hole of Japan Atomic Energy Research Institute, locking curve at a representative face factor of the specimen was measured to observe the mosaic structure accompanied with expansion of the crystal due to compression. As a result, though the specimen before compression could be supposed to be divided to some parts already, the locking curve under 10 sec. of compression time showed already some fracture to divisions to suppose finer degradation of the crystal, and division of the locking curve at 600 sec. of compression time could be observed onto its 220 face. And, every compressed specimens showed some changes of crystallization method from standard sample. (G.K.)

  19. Quality Assurance on Undoped CsI Crystals for the Mu2e Experiment

    Science.gov (United States)

    Atanov, N.; Baranov, V.; Budagov, J.; Davydov, Yu. I.; Glagolev, V.; Tereshchenko, V.; Usubov, Z.; Cervelli, F.; Di Falco, S.; Donati, S.; Morescalchi, L.; Pedreschi, E.; Pezzullo, G.; Raffaelli, F.; Spinella, F.; Colao, F.; Cordelli, M.; Corradi, G.; Diociaiuti, E.; Donghia, R.; Giovannella, S.; Happacher, F.; Martini, M.; Miscetti, S.; Ricci, M.; Saputi, A.; Sarra, I.; Echenard, B.; Hitlin, D. G.; Hu, C.; Miyashita, T.; Porter, F.; Zhang, L.; Zhu, R.-Y.; Grancagnolo, F.; Tassielli, G.; Murat, P.

    2018-02-01

    The Mu2e experiment is constructing a calorimeter consisting of 1,348 undoped CsI crystals in two disks. Each crystal has a dimension of 34 x 34 x 200 mm, and is readout by a large area silicon PMT array. A series of technical specifications was defined according to physics requirements. Preproduction CsI crystals were procured from three firms: Amcrys, Saint-Gobain and Shanghai Institute of Ceramics. We report the quality assurance on crystal's scintillation properties and their radiation hardness against ionization dose and neutrons. With a fast decay time of 30 ns and a light output of more than 100 p.e./MeV measured with a bi-alkali PMT, undoped CsI crystals provide a cost-effective solution for the Mu2e experiment.

  20. Thermal expansion of LATGS crystals

    International Nuclear Information System (INIS)

    Kassem, M.E.; Kandil, S.H.; Hamed, A.E.; Stankowska, J.

    1989-04-01

    The thermal expansion of triglycine sulphate crystals doped with L-α alanine (LATGS) has been studied around the phase transition temperature (30-60 deg. C) using thermomechanical analysis TMA. With increasing the content of admixture, the transition temperature (T c ) was shifted towards higher values, while the relative changes in the dimension of the crystals (ΔL/L 0 ) of the studied directions varied both in the para- and ferroelectric phases. The transition width in the case of doped crystals was found to be broad, and this broadening increases with increasing the content of L-α alanine. (author). 12 refs, 3 figs

  1. Crystallization peculiarities in metallic glasses

    International Nuclear Information System (INIS)

    Serebryakov, A.V.; Abrosimova, G.E.; Aronin, A.S.

    1985-01-01

    Methods of X-ray electron microscopy and X-ray diffraction analysis were used to investigate the peculiarities of crystallization of amorphous metallic Fe-B and Fe-Si-B alloys related to sufficient change of volume when passing from amorphous to crystalline state and the effect of sample prehistory on its thermal stability and crystallization kinetics. The dependence of morphology of crystalline phases formed during crystallization of amorphous Fe-B alloys on sample thickness was revealed and investigated. The model explaining this dependence was suggested. The observed differences are related, according to the model, with different diffusion ways of ''poles'' - elementary carriers of empty volume to their sinks

  2. Crystal structure determination of Efavirenz

    International Nuclear Information System (INIS)

    Popeneciu, Horea; Dumitru, Ristoiu; Tripon, Carmen; Borodi, Gheorghe; Pop, Mihaela Maria

    2015-01-01

    Needle-shaped single crystals of the title compound, C 14 H 9 ClF 3 NO 2 , were obtained from a co-crystallization experiment of Efavirenz with maleic acid in a (1:1) ratio, using methanol as solvent. Crystal structure determination at room temperature revealed a significant anisotropy of the lattice expansion compared to the previously reported low-temperature structure. In both low- and room temperature structures the cyclopropylethynyl fragment in one of the asymmetric unit molecules is disordered. While at low-temperature only one C atom exhibits positional disorder, at room temperature the disorder is present for two C atoms of the cyclopropane ring

  3. Random photonic crystal optical memory

    International Nuclear Information System (INIS)

    Wirth Lima Jr, A; Sombra, A S B

    2012-01-01

    Currently, optical cross-connects working on wavelength division multiplexing systems are based on optical fiber delay lines buffering. We designed and analyzed a novel photonic crystal optical memory, which replaces the fiber delay lines of the current optical cross-connect buffer. Optical buffering systems based on random photonic crystal optical memory have similar behavior to the electronic buffering systems based on electronic RAM memory. In this paper, we show that OXCs working with optical buffering based on random photonic crystal optical memories provides better performance than the current optical cross-connects. (paper)

  4. Institutional Churn: Institutional Change in United Kingdom Higher Education

    Science.gov (United States)

    Tight, Malcolm

    2013-01-01

    This article considers how higher education institutions change over time, using the United Kingdom system as an exemplar, and focusing on the 15-year period between 1994/95 and 2009/10. While there are many aspects of institutional change worthy of study, the focus here is on how institutions appear to others. Thus, the article examines the…

  5. California Institute for Water Resources - California Institute for Water

    Science.gov (United States)

    Resources Skip to Content Menu California Institute for Water Resources Share Print Site Map Resources Publications Keep in Touch QUICK LINKS Our Blog: The Confluence Drought & Water Information University of California California Institute for Water Resources California Institute for Water Resources

  6. Institutional Repositories at Small Institutions in America: Some Current Trends

    Science.gov (United States)

    Nykanen, Melissa

    2011-01-01

    The research reported in this article was undertaken to determine the level of implementation of institutional repositories (IRs) at small institutions enrolling fewer than 10,000 students. The study analyzed quantitative and qualitative data from IRs at a number of small institutions with the aim of observing relevant patterns and trends that may…

  7. Institutional Repositories: The Experience of Master's and Baccalaureate Institutions

    Science.gov (United States)

    Markey, Karen; St. Jean, Beth; Soo, Young Rieh; Yakel, Elizabeth; Kim, Jihyun

    2008-01-01

    In 2006, MIRACLE Project investigators censused library directors at all U.S. academic institutions about their activities planning, pilot testing, and implementing the institutional repositories on their campuses. Out of 446 respondents, 289 (64.8 percent) were from master's and baccalaureate institutions (M&BIs) where few operational…

  8. International Security Institutions, Domestic Politics, and Institutional Legitimacy

    Science.gov (United States)

    Chapman, Terrence L.

    2007-01-01

    Scholars have devoted considerable attention to the informational role of international institutions. However, several questions about the informational aspects of institutional behavior remain underexplored: What determines how audiences respond to institutional decisions? Through what channels does information provision affect foreign policy? To…

  9. TTI Phase 2 Institutional Support: Indian Institute of Dalit Studies ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    This funding will enhance the Indian Institute of Dalit Studies' (IIDS) role as a credible public policy institution in India by strengthening its ability to provide high-quality, influential, and policy-relevant research. About the Indian Institute of Dalit Studies IIDS is a social sciences research centre with a focus on development ...

  10. Institutional Repositories in Indian Universities and Research Institutes: A Study

    Science.gov (United States)

    Krishnamurthy, M.; Kemparaju, T. D.

    2011-01-01

    Purpose: The purpose of this paper is to report on a study of the institutional repositories (IRs) in use in Indian universities and research institutes. Design/methodology/approach: Repositories in various institutions in India were accessed and described in a standardised way. Findings: The 20 repositories studied covered collections of diverse…

  11. Crystal plasticity study of single crystal tungsten by indentation tests

    International Nuclear Information System (INIS)

    Yao, Weizhi

    2012-01-01

    Owing to its favorable material properties, tungsten (W) has been studied as a plasma-facing material in fusion reactors. Experiments on W heating in plasma sources and electron beam facilities have shown an intense micro-crack formation at the heated surface and sub-surface. The cracks go deep inside the irradiated sample, and often large distorted areas caused by local plastic deformation are present around the cracks. To interpret the crack-induced microscopic damage evolution process in W, one needs firstly to understand its plasticity on a single grain level, which is referred to as crystal plasticity. In this thesis, the crystal plasticity of single crystal tungsten (SCW) has been studied by spherical and Berkovich indentation tests and the finite element method with a crystal plasticity model. Appropriate values of the material parameters included in the crystal plasticity model are determined by fitting measured load-displacement curves and pile-up profiles with simulated counterparts for spherical indentation. The numerical simulations reveal excellent agreement with experiment. While the load-displacement curves and the deduced indentation hardness exhibit little sensitivity to the indented plane at small indentation depths, the orientation of slip directions within the crystals governs the development of deformation hillocks at the surface. It is found that several factors like friction, indentation depth, active slip systems, misoriented crystal orientation, misoriented sample surface and azimuthal orientation of the indenter can affect the indentation behavior of SCW. The Berkovich indentation test was also used to study the crystal plasticity of SCW after deuterium irradiation. The critical load (pop-in load) for triggering plastic deformation under the indenter is found to depend on the crystallographic orientation. The pop-in loads decrease dramatically after deuterium plasma irradiation for all three investigated crystallographic planes.

  12. Single Crystal Surfaces

    Science.gov (United States)

    Aguilar-Santillan, Joaquin

    2014-06-01

    The present work studies (0001) Al2O3 and (111) Al2MgO4 wetting with pure molten Al by the sessile drop technique from 1073 K to 1473 K (800 °C to 1200 °C) under Ar at PO2 10-15 Pa. Al pure liquid wets a smooth and chemically homogeneous surface of an inert solid, the wetting driving force ( t, T) can be readily studied when surface solid roughness increases in the system. Both crystals planes (0001) Al2O3 and (111) Al2MgO4 have crystallographic surfaces with identical O-2 crystalline positions however considering Mg2+ content in Al2MgO4 structure may influence a reactive mode. Kinetic models results under similar experimental conditions show that Al wetting on (0001) Al2O3 is less reactive than (111) Al2MgO4, however at >1273 K (1000 °C) (0001) Al2O3 transformation occurs and a transition of wetting improves. The (111) Al2MgO4 and Al system promotes interface formations that slow its wetting process.

  13. Patterned Colloidal Photonic Crystals.

    Science.gov (United States)

    Hou, Jue; Li, Mingzhu; Song, Yanlin

    2018-03-01

    Colloidal photonic crystals (PCs) have been well developed because they are easy to prepare, cost-effective, and versatile with regards to modification and functionalization. Patterned colloidal PCs contribute a novel approach to constructing high-performance PC devices with unique structures and specific functions. In this review, an overview of the strategies for fabricating patterned colloidal PCs, including patterned substrate-induced assembly, inkjet printing, and selective immobilization and modification, is presented. The advantages of patterned PC devices are also discussed in detail, for example, improved detection sensitivity and response speed of the sensors, control over the flow direction and wicking rate of microfluidic channels, recognition of cross-reactive molecules through an array-patterned microchip, fabrication of display devices with tunable patterns, well-arranged RGB units, and wide viewing-angles, and the ability to construct anti-counterfeiting devices with different security strategies. Finally, the perspective of future developments and challenges is presented. © 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

  14. Crystal structure of pymetrozine

    Directory of Open Access Journals (Sweden)

    Youngeun Jeon

    2015-07-01

    Full Text Available The title compound, C10H11N5O {systematic name: 6-methyl-4-[(E-(pyridin-3-ylmethylideneamino]-4,5-dihydro-1,2,4-triazin-3(2H-one}, C10H11N5O, is used as an antifeedant in pest control. The asymmetric unit comprises two independent molecules, A and B, in which the dihedral angles between the pyridinyl and triazinyl ring planes [r.m.s. deviations = 0.0132 and 0.0255 ] are 11.60 (6 and 18.06 (4°, respectively. In the crystal, N—H...O, N—H...N, C—H...N and C—H...O hydrogen bonds, together with weak π–π interactions [ring-centroid separations = 3.5456 (9 and 3.9142 (9 Å], link the pyridinyl and triazinyl rings of A molecules, generating a three-dimensional network.

  15. Productivity and Institutions

    Directory of Open Access Journals (Sweden)

    Gylfi Zoega

    2015-12-01

    Full Text Available Differences in productivity account for differences in output per capita between countries as well as changes in output and the standard of living for each country over long periods of time. During the first industrial revolution, one could already see the emergence of two groups of countries: the high- and the low-GDP per capita countries. The list of countries belonging to the highproductivity group has not changed much over the past century. Differences in institutions separate the two clubs. The high-productivity group is, amongst many other differences, characterized by less corruption, a better legal system, superior enforcement of contracts, a lower cost of starting a business and lower tariffs. Historical output series for Britain going back to the mid-19th century show that productivity has increased greatly and improved the standard of living.

  16. Budget institutions and taxation

    DEFF Research Database (Denmark)

    Aaskoven, Lasse

    2018-01-01

    While a number of different studies have explored the effects of budgetary procedures and the centralization of the budget process on government debt, deficits and spending, few of them have explored whether such fiscal institutions matter for public revenue. This article argues that centralizing...... the budget process raises the levels of taxation by limiting the ability of individual government officials to veto tax increases in line with common-pool-problem arguments regarding public finances. Using detailed data on budgetary procedures from 15 EU countries, the empirical analysis shows that greater...... centralization of the budget process increases taxation as a share of GDP and that both the type of budget centralization and level of government fractionalization matter for the size of this effect. The results suggest that further centralizing the budget process limits government debt and deficits...

  17. Institute for Atomic Energy

    International Nuclear Information System (INIS)

    1980-01-01

    The Institute has in 1980 changed its name to 'Institutt for Energiteknikk' and this reflects a de facto change in programme emphasis in which a large part of the activity in 1979 was in energy systems analysis, energy technology and conservation, petroleum technology,etc. However previous projects in environmental and safety aspects of nuclear power, risk analysis and fundamental physics using neutron beams, have continued. Nuclear technology is now concentrated in the Halden Reactor Project, whose work is outlined. Isotope production based on the JEEP II reactor and irradiation there and in the Co-60 plant, and isotope applications in environmental and resource investigations continue as previously. Waste processing and safeguards are also carried out as national responsibilities. (JIW)

  18. Relationships Between Culture and Institutions

    DEFF Research Database (Denmark)

    Schultz, Majken

    2012-01-01

    This article suggests four different relationships between institutionalism and organizational culture seen as two different levels of analysis. The relationships represent a continuum from a significant influence of the institutional level on organizational culture to a significant cultural...... influence on the formation and construction of institutions. The four relationships are defined as 1) cultural filtering of institutional pressure from isomorphism, 2) organizational culture as a source of new institutional elements, 3) organizational culture as a source of positioning towards institutions...... the relationships between culture and institutions and how they are connected. Finally, the article points at the influence of globalization challenging the national origin of many institutions when relating to a world of organizations, which increasingly are becoming global. For some companies, organizational...

  19. Social Movements and Institutions

    Directory of Open Access Journals (Sweden)

    Maria Francisca Pinheiro Coelho

    2017-04-01

    Full Text Available Abstract This study approaches the relationship between social movements and institutions in Brazil concerning three different stages of the process of re-democratization: the political transition; the National Constituent Assembly; and the new Constitutional Order. The general question is: what is the interface, reciprocity or conflict, between social movements and institutions in this context of social change? The paper examines the different roles of social movements and institutions in each specific period: in the pre-democratization moment, the movement for direct elections for president, Diretas-Já, is analyzed; in the National Constituent Assembly, the movement in defense for free public education is examined;  in the new constitutional order, the pro-reform political movement is studied.  The work focuses on the scope of the studies on social movements and democracy.  It belongs to the field of the studies about the representativeness and legitimacy of the demands of social movements in the context of democracy and its challenges. Key words: social movement, institution, reciprocity, conflict, democracy.   Social Movements and Institutions                               Resumen El estudio aborda la relación entre los movimientos sociales e instituciones en Brasil en tres etapas diferentes del proceso de redemocratización en las últimas décadas: la transición política; la Asamblea Nacional Constituyente; y el nuevo orden constitucional. La pregunta general es: ¿cuál es la relación, la reciprocidad o el conflito, entre los movimientos sociales y las instituciones en este contexto de cambio social? El artículo examina los diferentes roles de los movimientos sociales e instituciones en cada período específico: en el momento de la transición política analiza el movimiento de las elecciones directas para presidente, las Diretas-Já; en la Asamblea Nacional Constituyente aborda el movimiento en

  20. Channeling crystals for positron production

    International Nuclear Information System (INIS)

    Decker, F.J.

    1991-05-01

    Particles traversing at small angles along a single crystal axis experience a collective scattering force of many crystal atoms. The enormous fields can trap the particles along an axis or plane, called channeling. High energy electrons are attracted by the positive nuclei and therefore produce strongly enhanced so called coherent bremsstrahlung and pair production. These effects could be used in a positron production target: A single tungsten crystal is oriented to the incident electron beam within 1 mrad. At 28 GeV/c the effective radiation length is with 0.9 mm about one quarter of the amorphous material. So the target length can be shorter, which yields a higher conversion coefficient and a lower emittance of the positron beam. This makes single crystals very interesting for positron production targets. 18 refs., 2 figs

  1. Molecular mechanisms of crystal growth

    International Nuclear Information System (INIS)

    Pina, C. M.

    2000-01-01

    In this paper I present an example of the research that the Mineral Surface Group of the Munster University is conducting in the field of Crystal Growth. Atomic Force Microscopy (Am) in situ observations of different barite (BaSO4) faces growing from aqueous solutions, in combination with computer simulations of the surface attachment of growth units allows us to test crystal growth models. Our results demonstrate the strong structural control that a crystal can exert on its own growth, revealing also the limitation of the classical crystal growth theories (two dimensional nucleation and spiral growth models) in providing a complete explanation for the growth behaviour at a molecular scale. (Author) 6 refs

  2. Size effects in crystal plasticity

    DEFF Research Database (Denmark)

    Borg, Ulrik

    2007-01-01

    Numerical analyses of plasticity size effects have been carried out for different problems using a developed strain gradient crystal plasticiy theory. The theory employs higher order stresses as work conjugates to slip gradients and uses higher order boundary conditions. Problems on localization...... of plastic flow in a single crystal, grain boundary effects in a bicrystal, and grain size effects in a polycrystal are studied. Single crystals containing micro-scale voids have also been analyzed at different loading conditions with focus on the stress and deformation fields around the voids, on void...... growth and interaction between neighboring voids, and on a comparison between the developed strain gradient crystal plasticity theory and a discrete dislocation plasticity theory. Furthermore, voids and rigid inclusions in isotropic materials have been studied using a strain gradient plasticity theory...

  3. SYNTHESIS, CHARACTERIZATION AND CRYSTAL STRUCTURES ...

    African Journals Online (AJOL)

    B. S. Chandravanshi

    ABSTRACT. Reaction of [VO(acac)2] (acac = acetylacetonate) with ... Single crystal X-ray structural studies indicate that the hydrazone ligands coordinate to ..... Molecular structure of complex (1) at 30% probability displacement. Figure 4.

  4. SYNTHESIS, CHARACTERIZATION AND CRYSTAL STRUCTURE ...

    African Journals Online (AJOL)

    Preferred Customer

    Reaction of [MoO2(acac)2] (where acac = acetylacetonate) with N'-(2-hydroxy-4- ... Single crystal X-ray structural studies indicate that the hydrazone ligand coordinates .... Molecular structure of the complex at 30% probability displacement.

  5. SYNTHESIS, CHARACTERIZATION, AND CRYSTAL STRUCTURE ...

    African Journals Online (AJOL)

    a

    KEY WORDS: Barium, Crystal structure, 2,6-Pyridinedicarboxylic acid .... The rational design of novel metal-organic frameworks has attracted great ..... Bond, A.D.; Jones, W. Supramolecular Organization and Materials Design, Jones, W.; Rao,.

  6. Absence of Quantum Time Crystals.

    Science.gov (United States)

    Watanabe, Haruki; Oshikawa, Masaki

    2015-06-26

    In analogy with crystalline solids around us, Wilczek recently proposed the idea of "time crystals" as phases that spontaneously break the continuous time translation into a discrete subgroup. The proposal stimulated further studies and vigorous debates whether it can be realized in a physical system. However, a precise definition of the time crystal is needed to resolve the issue. Here we first present a definition of time crystals based on the time-dependent correlation functions of the order parameter. We then prove a no-go theorem that rules out the possibility of time crystals defined as such, in the ground state or in the canonical ensemble of a general Hamiltonian, which consists of not-too-long-range interactions.

  7. Magnonic crystals for data processing

    International Nuclear Information System (INIS)

    Chumak, A V; Serga, A A; Hillebrands, B

    2017-01-01

    Magnons (the quanta of spin waves) propagating in magnetic materials with wavelengths at the nanometer-scale and carrying information in the form of an angular momentum can be used as data carriers in next-generation, nano-sized low-loss information processing systems. In this respect, artificial magnetic materials with properties periodically varied in space, known as magnonic crystals, are especially promising for controlling and manipulating magnon currents. In this article, different approaches for the realization of static, reconfigurable, and dynamic magnonic crystals are presented along with a variety of novel wave phenomena discovered in these crystals. Special attention is devoted to the utilization of magnonic crystals for processing of analog and digital information. (paper)

  8. Nanoparticles Doped, Photorefractive Liquid Crystals

    National Research Council Canada - National Science Library

    Kaczmarek, Malgosia

    2005-01-01

    ...: The main objectives of this exploratory, short project will concern the study of the quality of liquid crystal cells with diluted suspensions of ferroelectric nanoparticles and their photorefractive properties...

  9. Legal Institutions and Economic Development

    NARCIS (Netherlands)

    Beck, T.H.L.

    2010-01-01

    Legal institutions are critical for the development of market-based economies. This paper defines legal institutions and discusses different indicators to measure their quality and efficiency. It surveys a large historical and empirical literature showing the importance of legal institutions in

  10. Protein Crystal Recombinant Human Insulin

    Science.gov (United States)

    1994-01-01

    The comparison of protein crystal, Recombiant Human Insulin; space-grown (left) and earth-grown (right). On STS-60, Spacehab II indicated that space-grown crystals are larger and of greater optical clarity than their earth-grown counterparts. Recombiant Human Insulin facilitates the incorporation of glucose into cells. In diabetics, there is either a decrease in or complete lack of insulin, thereby leading to several harmful complications. Principal Investigator is Larry DeLucas.

  11. Modeling of photonic Crystal Fibres

    DEFF Research Database (Denmark)

    Bjarklev, Anders Overgaard; Broeng, Jes; Barkou, Stig Eigil

    1999-01-01

    Diferent theoretical models for analysis of photonic crystal fibres are reviewed and compaired. The methods span from simple scalar approaches to full-vectorial models using different mode-field decompositions. The specific advantages of the methods are evaluated.......Diferent theoretical models for analysis of photonic crystal fibres are reviewed and compaired. The methods span from simple scalar approaches to full-vectorial models using different mode-field decompositions. The specific advantages of the methods are evaluated....

  12. Semiconductor crystal high resolution imager

    Science.gov (United States)

    Levin, Craig S. (Inventor); Matteson, James (Inventor)

    2011-01-01

    A radiation imaging device (10). The radiation image device (10) comprises a subject radiation station (12) producing photon emissions (14), and at least one semiconductor crystal detector (16) arranged in an edge-on orientation with respect to the emitted photons (14) to directly receive the emitted photons (14) and produce a signal. The semiconductor crystal detector (16) comprises at least one anode and at least one cathode that produces the signal in response to the emitted photons (14).

  13. Charge transport in organic crystals

    Energy Technology Data Exchange (ETDEWEB)

    Ortmann, Frank

    2009-07-01

    The understanding of charge transport is one of the central goals in the research on semiconducting crystals. For organic crystals this is particularly complicated due to the strength of the electron-phonon interaction which requires the description of a seamless transition between the limiting cases of a coherent band-transport mechanism and incoherent hopping. In this thesis, charge transport phenomena in organic crystals are studied by theoretical means. A theory for charge transport in organic crystals is developed which covers the whole temperature range from low T, where it reproduces an expression from the Boltzmann equation for band transport, via elevated T, where it generalizes Holstein's small-polaron theory to finite bandwidths, up to high T, for which a temperature dependence equal to Marcus' electron-transfer theory is obtained. Thereby, coherent band transport and thermally induced hopping are treated on equal footing while simultaneously treating the electron-phonon interaction non-perturbatively. By avoiding the approximation of narrow polaron bands the theory allows for the description of large and small polarons and serves as a starting point for computational studies. The theoretical description is completed by using ab initio material parameters for the selected crystals under study. These material parameters are taken from density functional theory calculations for durene, naphthalene, and guanine crystals. Besides the analysis of the transport mechanism, special focus is put on the study of the relationship between mobility anisotropy and structure of the crystals. This study is supported by a 3D-visualization method for the transport channels in such crystals which has been derived in this thesis. (orig.)

  14. Polariton effects in naphthalene crystals

    International Nuclear Information System (INIS)

    Robinette, S.L.

    1977-10-01

    The experimental verification of the two-step nature of energy dissipation of photon energy by a crystal is the subject of this dissertation. The α(O,O) Davydov component of the lowest energy singlet transition in pure strain-free napthalene single crystals is shown to exhibit an increase in absorption with increasing temperature, due to an increase in polariton damping via polariton-phonon scattering processes

  15. Adaptive Liquid Crystal Windows

    Energy Technology Data Exchange (ETDEWEB)

    Taheri, Bahman; Bodnar, Volodymyr

    2011-12-31

    Energy consumption by private and commercial sectors in the U.S. has steadily grown over the last decade. The uncertainty in future availability of imported oil, on which the energy consumption relies strongly, resulted in a dramatic increase in the cost of energy. About 20% of this consumption are used to heat and cool houses and commercial buildings. To reduce dependence on the foreign oil and cut down emission of greenhouse gases, it is necessary to eliminate losses and reduce total energy consumption by buildings. To achieve this goal it is necessary to redefine the role of the conventional windows. At a minimum, windows should stop being a source for energy loss. Ideally, windows should become a source of energy, providing net gain to reduce energy used to heat and cool homes. It is possible to have a net energy gain from a window if its light transmission can be dynamically altered, ideally electronically without the need of operator assistance, providing optimal control of the solar gain that varies with season and climate in the U.S. In addition, the window must not require power from the building for operation. Resolution of this problem is a societal challenge and of national interest and will have a broad global impact. For this purpose, the year-round, allclimate window solution to provide an electronically variable solar heat gain coefficient (SHGC) with a wide dynamic range is needed. AlphaMicron, Inc. (AMI) developed and manufactured 1ft × 1ft prototype panels for the world’s first auto-adjusting Adaptive Liquid Crystal Windows (ALCWs) that can operate from sunlight without the need for external power source and demonstrate an electronically adjustable SHGC. This novel windows are based on AlphaMicron’s patented e-Tint® technology, a guesthost liquid crystal system implemented on flexible, optically clear plastic films. This technology is suitable both for OEM and aftermarket (retro-fitting) lamination to new and existing windows. Low level of

  16. Protein crystal nucleation in pores.

    Science.gov (United States)

    Nanev, Christo N; Saridakis, Emmanuel; Chayen, Naomi E

    2017-01-16

    The most powerful method for protein structure determination is X-ray crystallography which relies on the availability of high quality crystals. Obtaining protein crystals is a major bottleneck, and inducing their nucleation is of crucial importance in this field. An effective method to form crystals is to introduce nucleation-inducing heterologous materials into the crystallization solution. Porous materials are exceptionally effective at inducing nucleation. It is shown here that a combined diffusion-adsorption effect can increase protein concentration inside pores, which enables crystal nucleation even under conditions where heterogeneous nucleation on flat surfaces is absent. Provided the pore is sufficiently narrow, protein molecules approach its walls and adsorb more frequently than they can escape. The decrease in the nucleation energy barrier is calculated, exhibiting its quantitative dependence on the confinement space and the energy of interaction with the pore walls. These results provide a detailed explanation of the effectiveness of porous materials for nucleation of protein crystals, and will be useful for optimal design of such materials.

  17. Hydrothermal Growth of Polyscale Crystals

    Science.gov (United States)

    Byrappa, Kullaiah

    In this chapter, the importance of the hydrothermal technique for growth of polyscale crystals is discussed with reference to its efficiency in synthesizing high-quality crystals of various sizes for modern technological applications. The historical development of the hydrothermal technique is briefly discussed, to show its evolution over time. Also some of the important types of apparatus used in routine hydrothermal research, including the continuous production of nanosize crystals, are discussed. The latest trends in the hydrothermal growth of crystals, such as thermodynamic modeling and understanding of the solution chemistry, are elucidated with appropriate examples. The growth of some selected bulk, fine, and nanosized crystals of current technological significance, such as quartz, aluminum and gallium berlinites, calcite, gemstones, rare-earth vanadates, electroceramic titanates, and carbon polymorphs, is discussed in detail. Future trends in the hydrothermal technique, required to meet the challenges of fast-growing demand for materials in various technological fields, are described. At the end of this chapter, an Appendix 18.A containing a more or less complete list of the characteristic families of crystals synthesized by the hydrothermal technique is given with the solvent and pressure-temperature (PT) conditions used in their synthesis.

  18. Spin waves in quantum crystals

    International Nuclear Information System (INIS)

    Kondratenko, P.S.

    1975-01-01

    The paper considers the spectrum of spin waves of a quantum magnetic crystal. It has been assumed that the crystal is characterized by gapless Fermi excitations. The properties of a single-particle Green function for a magnetic crystal are briefly outlined. The dispersion equation system describing the spin wave spectrum has been derived. The spectrum described by the equation system comprises a group of Goldstone modes and a family of spin waves of the zero sound type, associated with the group by an interaction. The maximum number of Goldstone modes in an antiferromagnet is three, whereas in a ferromagnet it is two. At frequencies higher than the characteristic frequencies of magnetic interactions, in an antiferromagnet all three modes have a linear spectrum, whereas in a ferromagnet the longitudinal mode is represented by a linear spectrum and the transverse mode, by a quadratic one. The dynamical susceptibility of a magnetically ordered crystal has been calculated. The thermodynamical potential of the crystal has been proved to vary as a function of the angular crystal orientation in a spin subspace. The results have been obtained by methods of the quantum field theory for the case of zero temperature

  19. Teacher Enhancement Institute

    Science.gov (United States)

    Marshall-Bradley, Tina

    1994-01-01

    During the 1980's, a period of intense concern over educational quality in the United States, few indicators of U.S. student achievement garnered the interest of policy makers and pundits as successfully as the results of international testing in mathematics and science. This concern was so great that as a part of the Goals 2000 initiative, President George Bush indicated that 'By the year 2000, U.S. students should be first in the world in mathematics and science.' The Clinton Administration is placing a major emphasis, not only on rigorous academic standards and creating a new system for assessing students' progress, but also including professional development as a major focus. The argument being that teachers need more sustained, intensive training to prepare them to teach to higher standards. Executive order 12821 mandates that national laboratories 'assist in the mathematics and science education of our Nation's students, teachers, parents and the public by establishing programs at their agency to provide for training elementary and secondary school teachers to improve their knowledge of mathematics and science'. These and other issues led to the development of ideas for a project that addresses the need for excellence in mathematics, science and technology instruction. In response to these initiatives the NASA/LaRC Teacher Enhancement Institute was proposed. The TEI incorporated systemic reform perspectives, enhanced content knowledge for teachers, and teacher preparation. Emphasis was also placed on recruiting those educators who teach in impoverished urban school districts with at-risk student populations who have been traditionally under represented in science, mathematics, technology and engineering. Participants in the Teacher Enhancement Institute were 37 teachers from grades K-8, teaching in Region 2 in the state of Virginia, as well as 2 preservice teachers from Norfolk State University and one teacher from Dublin, Virginia, where a Science

  20. Influence of clay content on the melting behavior and crystal structure of nonisothermal crystallized poly(L-lactic acid)/nanocomposites

    Czech Academy of Sciences Publication Activity Database

    Ublekov, F.; Baldrian, Josef; Kratochvíl, Jaroslav; Steinhart, M.; Nedkov, E.

    2012-01-01

    Roč. 124, č. 2 (2012), s. 1643-1648 ISSN 0021-8995 Institutional research plan: CEZ:AV0Z40500505 Keywords : biopolymers * nanocomposite s * crystal structures Subject RIV: CD - Macromolecular Chemistry Impact factor: 1.395, year: 2012

  1. Crystal structures and vibrational spectra of biuret co-crystals with cyanuric and glutaric acids, discussion of hydrogen bonding involving carbonyl groups

    Czech Academy of Sciences Publication Activity Database

    Matulková, I.; Mathauserová, J.; Císařová, I.; Němec, I.; Fábry, Jan

    2016-01-01

    Roč. 231, č. 5 (2016), s. 291-300 ISSN 2194-4946 R&D Projects: GA ČR GA14-05506S Institutional support: RVO:68378271 Keywords : biuret * crystal structure analysis * hydrogen bonding * vibrational spectroscopy * X-ray diffraction Subject RIV: CF - Physical ; Theoretical Chemistry Impact factor: 3.179, year: 2016

  2. Molecular crystals of 2-amino-1,3,4-thiadiazole with inorganic oxyacids – crystal engineering, phase transformations and NLO properties

    Czech Academy of Sciences Publication Activity Database

    Matulková, Irena; Cihelka, J.; Pojarová, Michaela; Fejfarová, Karla; Dušek, Michal; Císařová, I.; Vaněk, Přemysl; Kroupa, Jan; Němec, P.; Tesařová, N.; Němec, I.

    2014-01-01

    Roč. 16, č. 9 (2014), s. 1763-1776 ISSN 1466-8033 Grant - others:AVČR(CZ) Praemium Academiae Institutional support: RVO:68378271 Keywords : molecular crystals * inorganic salts * structure determination * second harmonic generation Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 4.034, year: 2014

  3. NEWS: Institute news

    Science.gov (United States)

    2000-03-01

    Recognition for teachers The Institute of Physics has continued its programme of recognition for inspiring teachers with nine Teachers Awards in 2000, one at primary level and eight at secondary. The quality and quantity of nominations for secondary awards was very encouraging, especially those nominations made by students, but the number of nominations for teachers in the primary sector was disappointing. The award winners are: Teacher of Primary Science Graham Tomlinson, Cockermouth School, Cumbria Gill Stafford, Greens Norton Church of England Primary School, Towcester, Northants Teachers of Physics (Secondary) John Allen, All Hallows High School, Penwortham, Preston Tim Gamble, Lings Upper School, Northampton Denise Gault, Dalriada School, Ballymoney, Co Antrim Ian Lovat, Ampleforth College, North Yorkshire David Smith, Highgate School, North London Clive Thomas, Newcastle Emlyn Comprehensive School Graham Tomlinson, Cockermouth School, Cumbria Mark Travis, Cape Cornwall School, St Just, Cornwall If you know a teacher in a local primary school who is doing an exceptional job in motivating youngsters and colleagues in the teaching and learning of science, why not consider nominating them for an award? Further details can be obtained from the Institute's Education Department (Steven Chapman) by post or e-mail (schools.education@iop.org .) Annual Congress More details are now available on the various activities at this event taking place on 27 - 30 March 2000 at the Brighton Conference Centre. Among those organized by the Education Department are general science and technology hands-on activities for pupils aged 10 to 12 and more specific physics activities on Static Electricity for older students: * A series of short talks with hands-on demonstrations of music and musical instruments given by musicians, manufacturers and physicists. * A chance for students in years 9 to 13 to experience music making from the professionals' perspective. Mornings, 28 to 30 March

  4. The California Hazards Institute

    Science.gov (United States)

    Rundle, J. B.; Kellogg, L. H.; Turcotte, D. L.

    2006-12-01

    California's abundant resources are linked with its natural hazards. Earthquakes, landslides, wildfires, floods, tsunamis, volcanic eruptions, severe storms, fires, and droughts afflict the state regularly. These events have the potential to become great disasters, like the San Francisco earthquake and fire of 1906, that overwhelm the capacity of society to respond. At such times, the fabric of civic life is frayed, political leadership is tested, economic losses can dwarf available resources, and full recovery can take decades. A patchwork of Federal, state and local programs are in place to address individual hazards, but California lacks effective coordination to forecast, prevent, prepare for, mitigate, respond to, and recover from, the harmful effects of natural disasters. Moreover, we do not know enough about the frequency, size, time, or locations where they may strike, nor about how the natural environment and man-made structures would respond. As California's population grows and becomes more interdependent, even moderate events have the potential to trigger catastrophes. Natural hazards need not become natural disasters if they are addressed proactively and effectively, rather than reactively. The University of California, with 10 campuses distributed across the state, has world-class faculty and students engaged in research and education in all fields of direct relevance to hazards. For that reason, the UC can become a world leader in anticipating and managing natural hazards in order to prevent loss of life and property and degradation of environmental quality. The University of California, Office of the President, has therefore established a new system-wide Multicampus Research Project, the California Hazards Institute (CHI), as a mechanism to research innovative, effective solutions for California. The CHI will build on the rich intellectual capital and expertise of the Golden State to provide the best available science, knowledge and tools for

  5. Formal Institutions and Subjective Wellbeing

    DEFF Research Database (Denmark)

    Bjørnskov, Christian; Dreher, Axel; Fischer, Justina A.V.

    2010-01-01

    A long tradition in economics explores the association between the quality of formal institutions and economic performance. The literature on the relationship between such institutions and happiness is, however, rather limited, and inconclusive. In this paper, we revisit the findings from recent...... cross-country studies on the institution-happiness association. Our findings suggest that their conclusions are qualitatively rather insensitive to the specific measure of 'happiness' used, while the associations between formal institutions and subjective well-being differ among poor and rich countries....... Separating different types of institutional quality, we find that in low-income countries the effects of economic-judicial institutions on happiness dominate those of political institutions, while analyses restricted to middle- and high-income countries show strong support for an additional beneficial effect...

  6. Institutional analysis for energy policy

    Energy Technology Data Exchange (ETDEWEB)

    Morris, F.A.; Cole, R.J.

    1980-07-01

    This report summarizes principles, techniques, and other information for doing institutional analyses in the area of energy policy. The report was prepared to support DOE's Regional Issues Identification and Assessment (RIIA) program. RIIA identifies environmental, health, safety, socioeconomic, and institutional issues that could accompany hypothetical future scenarios for energy consumption and production on a regional basis. Chapter 1 provides some theoretical grounding in institutional analysis. Chapter 2 provides information on constructing institutional maps of the processes for bringing on line energy technologies and facilities contemplated in RIIA scenarios. Chapter 3 assesses the institutional constraints, opportunities, and impacts that affect whether these technologies and facilities would in fact be developed. Chapters 4 and 5 show how institutional analysis can support use of exercises such as RIIA in planning institutional change and making energy policy choices.

  7. Studying institutional work in organizations

    DEFF Research Database (Denmark)

    Bjerregaard, Toke

    2011-01-01

    Purpose – In order to provide new and other directions to institutional studies in organization theory, Lawrence and Suddaby forward the notion of institutional work of actors aimed at maintaining, changing and disrupting institutions. The purpose of this paper is to further theory and method...... in studying the institutional work of people in organizations. Design/methodology/approach – Methodological insights from the ways in which theories of human agency in institutional contexts have co-evolved with field study methodologies are analyzed in related fields of research, particularly in sociology...... and anthropology. Findings – The ways have been analyzed in which social theories of human agency in institutional contexts and field methodology have co-evolved in an inter-disciplinary perspective. The analysis shows how field methodologies may provide inspirations to theory and method in studying institutional...

  8. Integrative Bioengineering Institute

    Energy Technology Data Exchange (ETDEWEB)

    Eddington, David; Magin,L,Richard; Hetling, John; Cho, Michael

    2009-01-09

    Microfabrication enables many exciting experimental possibilities for medicine and biology that are not attainable through traditional methods. However, in order for microfabricated devices to have an impact they must not only provide a robust solution to a current unmet need, but also be simple enough to seamlessly integrate into standard protocols. Broad dissemination of bioMEMS has been stymied by the common aim of replacing established and well accepted protocols with equally or more complex devices, methods, or materials. The marriage of a complex, difficult to fabricate bioMEMS device with a highly variable biological system is rarely successful. Instead, the design philosophy of my lab aims to leverage a beneficial microscale phenomena (e.g. fast diffusion at the microscale) within a bioMEMS device and adapt to established methods (e.g. multiwell plate cell culture) and demonstrate a new paradigm for the field (adapt instead of replace). In order for the field of bioMEMS to mature beyond novel proof-of-concept demonstrations, researchers must focus on developing systems leveraging these phenomena and integrating into standard labs, which have largely been ignored. Towards this aim, the Integrative Bioengineering Institute has been established.

  9. PSI Paul Scherrer Institute

    International Nuclear Information System (INIS)

    Lefrancois, M.; Pladys, D.

    2008-05-01

    From research activities focused on civil and military uses of nuclear energy and developed after the second world war, the Paul Scherrer Institute (PSI) has been able to diversify its activities following 2 axis. First, the Gantry proton-therapy that is characterized by a compact equipment and an accurate 3-dimensional treatment of tumors (more than 260 patients have been treated by Gantry from 1996 to 2005). Secondly, new technologies in the fields of energy and transport. Nevertheless, PSI has been able to keep a high of valuation of its staff in nuclear engineering and materials that are the core of its activities. The main equipment of PSI are: -) SLS (Swiss Light Source): a synchrotron radiation source that is both a microscope and an X-ray source; -) SINQ: a neutron source based on spallation reactions; -)SμS: a muon source; and -) the Philips accelerator that is used in radiochemistry and the production of isotopes used for the treatment of eye tumors. PSI has established a large cooperation with French research laboratories on issues like: nuclear reactor safety, synchrotron radiation, the transmutation of nuclear wastes, the design of a source of ultra-cold neutrons, or the development of a hydrogen-fueled light vehicle. The total budget of PSI for 2007 reached 174.2 million euros. (A.C.)

  10. Second crystal cooling on cryogenically cooled undulator and wiggler double crystal monochromators

    International Nuclear Information System (INIS)

    Knapp, G. S.

    1998-01-01

    Simple methods for the cooling of the second crystals of cryogenically cooled undulator and wiggler double crystal monochromators are described. Copper braids between the first and second crystals are used to cool the second crystals of the double crystal monochromators. The method has proved successful for an undulator monochromator and we describe a design for a wiggler monochromator

  11. Phase-field crystal simulation facet and branch crystal growth

    Science.gov (United States)

    Chen, Zhi; Wang, Zhaoyang; Gu, Xinrui; Chen, Yufei; Hao, Limei; de Wit, Jos; Jin, Kexin

    2018-05-01

    Phase-field crystal model with one mode is introduced to describe morphological transition. The relationship between growth morphology and smooth density distribution was investigated. The results indicate that the pattern selection of dendrite growth is caused by the competition between interface energy anisotropy and interface kinetic anisotropy based on the 2D phase diagram. When the calculation time increases, the crystal grows to secondary dendrite at the dimensionless undercooling equal to - 0.4. Moreover, when noise is introduced in the growth progress, the symmetry is broken in the growth mode, and there becomes irregular fractal-like growth morphology. Furthermore, the single crystal shape develops into polycrystalline when the noise amplitude is large enough. When the dimensionless undercooling is less than - 0.3, the noise has a significant effect on the growth shape. In addition, the growth velocity of crystal near to liquid phase line is slow, while the shape far away from the liquid adapts to fast growth. Based on the simulation results, the method was proved to be effective, and it can easily obtain different crystal shapes by choosing the different points in 2D phase diagram.

  12. A multistep single-crystal-to-single-crystal bromodiacetylene dimerization

    Science.gov (United States)

    Hoheisel, Tobias N.; Schrettl, Stephen; Marty, Roman; Todorova, Tanya K.; Corminboeuf, Clémence; Sienkiewicz, Andrzej; Scopelliti, Rosario; Schweizer, W. Bernd; Frauenrath, Holger

    2013-04-01

    Packing constraints and precise placement of functional groups are the reason that organic molecules in the crystalline state often display unusual physical or chemical properties not observed in solution. Here we report a single-crystal-to-single-crystal dimerization of a bromodiacetylene that involves unusually large atom displacements as well as the cleavage and formation of several bonds. Density functional theory computations support a mechanism in which the dimerization is initiated by a [2 + 1] photocycloaddition favoured by the nature of carbon-carbon short contacts in the crystal structure. The reaction proceeded up to the theoretical degree of conversion without loss of crystallinity, and it was also performed on a preparative scale with good yield. Moreover, it represents the first synthetic pathway to (E)-1,2-dibromo-1,2-diethynylethenes, which could serve as synthetic intermediates for the preparation of molecular carbon scaffolds. Our findings both extend the scope of single-crystal-to-single-crystal reactions and highlight their potential as a synthetic tool for complex transformations.

  13. NEWS: Institute news

    Science.gov (United States)

    2000-07-01

    When Mary took up her appointment in the Institute's Education Department in June 1997, she indicated that she wished to return to teaching in two or three years. We have just heard that in September she will be joining the staff of the Science Department at Camden Girls' School, London. Mary's departure from the Institute is a great loss to the Department, where she has worked tirelessly, and with great imagination, to support those who teach physics at all secondary levels - and at primary level too when the opportunity presented itself. She has made tremendous contributions to the careers side of the Department's work, supporting careers events, providing informal training for others willing to do the same, helping to develop new careers materials and identifying people whom the Institute could use as role models or as the subject of case studies in print or electronic publications. Mary has been equally happy and willing to support pupils, students and teachers, and has been a wonderful role model herself, coming from an industrial research background, training for teaching after a career break and willing and able to teach biology, chemistry and design technology as well as physics. Mary has also written and edited Phases virtually single-handed. We are delighted to hear that Mary will continue to support the department's work as one of its teacher `volunteers'. Ilya Eigenbrot We are pleased to report that Ilya Eigenbrot, who will be known to some through his work at the Royal Institution and his appearances at the Christmas Lectures in a technical support role, has agreed to give the IOP Schools (touring) Lecture next year. The subject will be Lasers and this will follow nicely on to Zbig's lecture this year. Resources (print) Physics on Course The tenth issue of the Institute's popular guide to higher education, Physics on Course 2001, will be published early in July and distributed to all schools and colleges in the United Kingdom and the Republic of

  14. Informal institutions and radical ideologies under institutional transformation

    Directory of Open Access Journals (Sweden)

    Irina Starodubrovskaya

    2015-06-01

    Full Text Available This article questions one of the central postulates of institutional economic theory, i.e., that of the sustainability and purely evolutionary changes of informal institutions. To study the phenomenon of the destruction of informal institutions and its consequences, we use the tools of sociological theory, which acknowledge that a period of intensive urbanization is characterized by anomie, i.e., a lack of norms, in which traditional institutions are destroyed, while new urban institutions have not yet taken shape. We reviewed the possible reactions of communities and individuals to the conditions of anomie, including the compensatory mechanisms of ideologies. In the case of the Dagestan Republic, we show how the proliferation of fundamentalist Islamic ideology is associated with the state of anomie and the consequences to which it could lead from an institutional point of view. The analysis of the situation in Dagestan is based on long-term field research conducted in the region.

  15. Prediction of molecular crystal structures

    International Nuclear Information System (INIS)

    Beyer, Theresa

    2001-01-01

    The ab initio prediction of molecular crystal structures is a scientific challenge. Reliability of first-principle prediction calculations would show a fundamental understanding of crystallisation. Crystal structure prediction is also of considerable practical importance as different crystalline arrangements of the same molecule in the solid state (polymorphs)are likely to have different physical properties. A method of crystal structure prediction based on lattice energy minimisation has been developed in this work. The choice of the intermolecular potential and of the molecular model is crucial for the results of such studies and both of these criteria have been investigated. An empirical atom-atom repulsion-dispersion potential for carboxylic acids has been derived and applied in a crystal structure prediction study of formic, benzoic and the polymorphic system of tetrolic acid. As many experimental crystal structure determinations at different temperatures are available for the polymorphic system of paracetamol (acetaminophen), the influence of the variations of the molecular model on the crystal structure lattice energy minima, has also been studied. The general problem of prediction methods based on the assumption that the experimental thermodynamically stable polymorph corresponds to the global lattice energy minimum, is that more hypothetical low lattice energy structures are found within a few kJ mol -1 of the global minimum than are likely to be experimentally observed polymorphs. This is illustrated by the results for molecule I, 3-oxabicyclo(3.2.0)hepta-1,4-diene, studied for the first international blindtest for small organic crystal structures organised by the Cambridge Crystallographic Data Centre (CCDC) in May 1999. To reduce the number of predicted polymorphs, additional factors to thermodynamic criteria have to be considered. Therefore the elastic constants and vapour growth morphologies have been calculated for the lowest lattice energy

  16. Prediction of molecular crystal structures

    Energy Technology Data Exchange (ETDEWEB)

    Beyer, Theresa

    2001-07-01

    The ab initio prediction of molecular crystal structures is a scientific challenge. Reliability of first-principle prediction calculations would show a fundamental understanding of crystallisation. Crystal structure prediction is also of considerable practical importance as different crystalline arrangements of the same molecule in the solid state (polymorphs)are likely to have different physical properties. A method of crystal structure prediction based on lattice energy minimisation has been developed in this work. The choice of the intermolecular potential and of the molecular model is crucial for the results of such studies and both of these criteria have been investigated. An empirical atom-atom repulsion-dispersion potential for carboxylic acids has been derived and applied in a crystal structure prediction study of formic, benzoic and the polymorphic system of tetrolic acid. As many experimental crystal structure determinations at different temperatures are available for the polymorphic system of paracetamol (acetaminophen), the influence of the variations of the molecular model on the crystal structure lattice energy minima, has also been studied. The general problem of prediction methods based on the assumption that the experimental thermodynamically stable polymorph corresponds to the global lattice energy minimum, is that more hypothetical low lattice energy structures are found within a few kJ mol{sup -1} of the global minimum than are likely to be experimentally observed polymorphs. This is illustrated by the results for molecule I, 3-oxabicyclo(3.2.0)hepta-1,4-diene, studied for the first international blindtest for small organic crystal structures organised by the Cambridge Crystallographic Data Centre (CCDC) in May 1999. To reduce the number of predicted polymorphs, additional factors to thermodynamic criteria have to be considered. Therefore the elastic constants and vapour growth morphologies have been calculated for the lowest lattice energy

  17. Synchrotron/crystal sample preparation

    Science.gov (United States)

    Johnson, R. Barry

    1993-01-01

    The Center for Applied Optics (CAO) of the University of Alabama in Huntsville (UAH) prepared this final report entitled 'Synchrotron/Crystal Sample Preparation' in completion of contract NAS8-38609, Delivery Order No. 53. Hughes Danbury Optical Systems (HDOS) is manufacturing the Advanced X-ray Astrophysics Facility (AXAF) mirrors. These thin-walled, grazing incidence, Wolter Type-1 mirrors, varying in diameter from 1.2 to 0.68 meters, must be ground and polished using state-of-the-art techniques in order to prevent undue stress due to damage or the presence of crystals and inclusions. The effect of crystals on the polishing and grinding process must also be understood. This involves coating special samples of Zerodur and measuring the reflectivity of the coatings in a synchrotron system. In order to gain the understanding needed on the effect of the Zerodur crystals by the grinding and polishing process, UAH prepared glass samples by cutting, grinding, etching, and polishing as required to meet specifications for witness bars for synchrotron measurements and for investigations of crystals embedded in Zerodur. UAH then characterized these samples for subsurface damage and surface roughness and figure.

  18. The Uranium Institute

    International Nuclear Information System (INIS)

    Mole, Ted

    1998-01-01

    Full text: The Uranium Institute has run a World Wide Web site since July 1995 and has seen user sessions reach around 5600 per week. The site comprises some 700 pages of news and information and has attracted a good deal of favourable comment. The site is intended as an information resource to augment the service provided by the UI Information Service and is aimed at both industry and non-industry web users. The actual user community includes UI members and others from the industry, mining and financial analysts, lots of students and school children, journalists and a large number of unknown individuals. Hopefully the workshop can be used to examine user reactions to industry sites and get some idea of the extent to which we are talking to ourselves over the net rather than talking to our 'publics'. Although the Ul was quite early on the web scene by nuclear standards, development of the UI site has proceeded fairly slowly and the accent has always been on good quality information. With 170,000 visitors per year site use indicates that there is a demand for nuclear information while responses indicate that there is a substantial body of quiet nuclear support which welcomes the opportunity to communicate with the industry. Does the web help to pull the industry and its supporters together? The WWW has often been portrayed as a vehicle which allows good news and information to be communicated direct to the 'public' but attempts to realise this opportunity have not always met with success. The UI has had a generally positive experience with its web site but this is not universally the case. I would like to explore the background to this both in my presentation and in the subsequent discussion. My general theme is to ask the question 'What do users want from a nuclear related web site and are we providing it?'. Conversely it is pertinent to ask the question, 'does what the users seem to want coincide with what we wish to supply?'. I will seek to address these

  19. Crystallization of isoelectrically homogeneous cholera toxin

    International Nuclear Information System (INIS)

    Spangler, B.D.; Westbrook, E.M.

    1989-01-01

    Past difficulty in growing good crystals of cholera toxin has prevented the study of the crystal structure of this important protein. The authors have determined that failure of cholera toxin to crystallize well has been due to its heterogeneity. They have now succeeded in overcoming the problem by isolating a single isoelectric variant of this oligomeric protein (one A subunit and five B subunits). Cholera toxin purified by their procedure readily forms large single crystals. The crystal form has been described previously. They have recorded data from native crystals of cholera toxin to 3.0-angstrom resolution with our electronic area detectors. With these data, they have found the orientation of a 5-fold symmetry axis within these crystals, perpendicular to the screw dyad of the crystal. They are now determining the crystal structure of cholera toxin by a combination of multiple heavy-atom isomorphous replacement and density modification techniques, making use of rotational 5-fold averaging of the B subunits

  20. Last crystals for the CMS chandelier

    CERN Multimedia

    2008-01-01

    In March, the last crystals for CMS’s electromagnetic calorimeter arrived from Russia and China. Like dedicated jewellers crafting an immense chandelier, the CMS ECAL collaborators are working extremely hard to install all the crystals before the start-up of the LHC. One of the last CMS end-cap crystals, complete with identification bar code. Lead tungstate crystals mounted onto one section of the CMS ECAL end caps. Nearly 10 years after the first production crystal arrived at CERN in September 1998, the very last shipment has arrived. These final crystals will be used to complete the end-caps of the electromagnetic calorimeter (ECAL) at CMS. All in all, there are more than 75,000 crystals in the ECAL. The huge quantity of CMS lead tungstate crystals used in the ECAL corresponds to the highest volume ever produced for a single experiment. The excellent quality of the crystals, both in ter...

  1. Organizational responses to institutional contradictions

    DEFF Research Database (Denmark)

    Bjerregaard, Toke; Jonasson, Charlotte

    to the stabilization and maintenance of its institutional opposite. The reported findings are based on an ethnographic field study of the institutional change processes that occurred in a South Korean credit card company in the aftermath of the Asian economic crisis in 1997 during the IMF intervention. The development...... of contradictory logics in the Korean field gave, in some companies, rise to social struggles for defining the direction and aim of the institutional changes....

  2. Marketing of an Educational Institution

    OpenAIRE

    Šijan, Pavel

    2009-01-01

    The main subject of this thesis is the area of marketing for educational institutions. First part is focused on general theoretical aspects of marketing of services, specificity of marketing for educational institutions and marketing communication. The operative part attends to a selection of an educational institution, an execution of an analysis of internal and external environment of the school, an implementation of a marketing research recognizing image of the school and based on that des...

  3. Workplace Innovation as Institutional Entrepreneurship

    DEFF Research Database (Denmark)

    Hvid, Helge Søndergaard; Scheller, Vibeke Kristine

    2017-01-01

    Workplace Innovation (WPI) ascribes to the tradition of Sociotechnical Systems (STS) in organisational development. Experiences of promoting STS show that neither economic arguments nor arguments of humanising work are sufficient to get companies to implement WPI activities. This chapter therefore...... that institutional alliances and coalitions are an important part of institutional entrepreneurship that creates change in the direction of WPI. The case studies also indicate that the sustainability of the introduced WPI activities depends on the institutional alliances related to their activity....

  4. Institutional Profiles: Some Strategic Tools

    Directory of Open Access Journals (Sweden)

    Frans van Vught

    2014-04-01

    Full Text Available In this paper we argue that both internal and external pressures and conditions urge contemporary higher education institutions to carefully think through their institutional profiles positions in domestic and global higher education contexts. We subsequently analyse strategic positioning from the strategic management literature and offer four tools — mapping, multi-dimensional ranking, benchmarking and degree profiling — to assist higher education institutions in their profiling and positioning strategies.

  5. Institutional shareholder activism in Nigeria

    OpenAIRE

    Uche, C.; Adegbite, E.; Jones, M.

    2016-01-01

    The file attached to this record is the author's final peer reviewed version. The Publisher's final version can be found by following the DOI link. Abstract Purpose-The purpose of this paper is to investigate institutional shareholder activism in Nigeria. It addresses the paucity of empirical research on institutional shareholder activism in sub-Saharan Africa. Design/Methodology-This study employs agency theory to understand the institutional shareholder approach to shareholde...

  6. Computational Strain Gradient Crystal Plasticity

    DEFF Research Database (Denmark)

    Niordson, Christian Frithiof; Kysar, Jeffrey W.

    2011-01-01

    A model for strain gradient crystal visco-plasticity is formulated along the lines proposed by Fleck andWillis (2009) for isotropic plasticity. Size-effects are included in the model due to the addition of gradient terms in both the free energy as well as through a dissipation potential. A finite...... element solution method is presented, which delivers the slip-rate field and the velocity-field based on two minimum principles. Some plane deformation problems relevant for certain specific orientations of a face centered cubic crystal under plane loading conditions are studied, and effective in......-plane parameters are developed based on the crystallographic properties of the material. The problem of cyclic shear of a single crystal between rigid platens is studied as well as void growth of a cylindrical void....

  7. On the nature of γ′ phase cutting and its effect on high temperature and low stress creep anisotropy of Ni-base single crystal superalloys

    Czech Academy of Sciences Publication Activity Database

    Jácome, L. A.; Nörtershäuser, P.; Somsen, C.; Dlouhý, Antonín; Eggeler, G.

    2014-01-01

    Roč. 69, MAY (2014), s. 246-264 ISSN 1359-6454 Institutional support: RVO:68081723 Keywords : Ni-base single crystal superalloys * Creep * Anisotropy * Dislocation * Rafting Subject RIV: JG - Metallurgy Impact factor: 4.465, year: 2014

  8. Imitation Modeling and Institutional Studies

    Directory of Open Access Journals (Sweden)

    Maksim Y. Barbashin

    2017-09-01

    Full Text Available This article discusses the use of imitation modeling in the conduct of institutional research. The institutional approach is based on the observation of social behavior. To understand a social process means to determine the key rules that individuals use, undertaking social actions associated with this process or phenomenon. This does not mean that institutions determine behavioral reactions, although there are a number of social situations where the majority of individuals follow the dominant rules. If the main laws of development of the institutional patterns are known, one can describe most of the social processes accurately. The author believes that the main difficulty with the analysis of institutional processes is their recursive nature: from the standards of behavior one may find the proposed actions of social agents who follow, obey or violate institutions, but the possibility of reconstructive analysis is not obvious. The author demonstrates how the institutional approach is applied to the analysis of social behavior. The article describes the basic principles and methodology of imitation modeling. Imitation modeling reveals the importance of institutions in structuring social transactions. The article concludes that in the long term institutional processes are not determined by initial conditions.

  9. Leadership in Islamic Education Institution

    Directory of Open Access Journals (Sweden)

    Supriadi Supriadi

    2014-11-01

    Full Text Available Education institution may not be separated by social system. It can be formal and informal education. A formal education institution such as school, Islamic school or Islamic boarding school is in social environment and bringing a basic value and law from its institution. Meanwhile, Islamic education institution is believed as tool to reach the aim of education. The aim of education is hard to reach if there is no leadership in it. Copyright © 2014 by Al-Ta'lim All right reserved

  10. Leadership in Islamic Education Institution

    OpenAIRE

    Supriadi Supriadi

    2014-01-01

    Education institution may not be separated by social system. It can be formal and informal education. A formal education institution such as school, Islamic school or Islamic boarding school is in social environment and bringing a basic value and law from its institution. Meanwhile, Islamic education institution is believed as tool to reach the aim of education. The aim of education is hard to reach if there is no leadership in it. Copyright © 2014 by Al-Ta'lim All right reserved

  11. North-South Institute Institutional Grant 2011-2012 | IDRC ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    The North-South Institute (NSI) is an established independent thinktank in Canada whose work focuses on international development, poverty reduction and global inequalities. Building on a long history of collaboration between NSI and IDRC, this grant will provide the Institute with core support for 2011-2012. NSI activities ...

  12. Institutional And Non-Institutional Credit Supply Services To Fisher ...

    African Journals Online (AJOL)

    Women in the study area prefer the informal, non institutional credit sources than the formal, institutional source as the poor fisher-folk require collateral for this which in most cases was not available. From the study, adequate finance with more relax conditions will go a long way in alleviating poverty and improving ...

  13. Fostering Institutional Creativity at Multiple Levels: Towards Facilitated Institutional Bricolage

    Directory of Open Access Journals (Sweden)

    Douglas J. Merrey

    2012-02-01

    Full Text Available Problems occur when institutional arrangements for collective management of food and water systems fail to meet demands. Many of the problems characterising river basins and other collectively managed water resource systems can be ascribed largely to the failure of institutions to enable problems beyond the individual to be managed collectively. The nature of these demands, and the institutional responses to them, vary widely and are not amenable to simple definitions and prescriptions. We begin with a brief review of conventional approaches to analysing institutions and organisations, focused largely, but not exclusively, on river basins. We observe that attempts to reduce the institutional landscape of river basins to over-simplistic formulas introduces more problems than solutions, because the reality is that institutions evolve through complex creative processes that adopt and adapt diverse ingredients – rather like making a stew. Despite such intricacies, institutions are clearly non-random, so we continue a search for a means of describing them. We adopt the concept of bricolage, as proposed by Cleaver and others, and use it to show the value of promoting and facilitating an organic creative approach to building and strengthening river basin and other water management institutions.

  14. Institutional Support : Kenya Institute for Public Policy Research and ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    In 2006 the Government of Kenya passed an Act of Parliament making the Kenya Institute for Public Policy Research and Analysis (KIPPRA) the government's lead socioeconomic research institute. The Act exerts enormous demands on KIPPRA at a time when it is trying to recover from the senior staff turnover suffered in ...

  15. Institutional Support : African Institute for Applied Economics (AIAE ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    The African Institute for Applied Economics (AIAE), Nigeria, is an independent policy research organization created in 2000. The Institute's mission is to promote evidence-based decision-making in the area of economic and social development. AIAE's strength is research and advocacy in the area of business environment, ...

  16. The Emergence of a Proto-institution

    DEFF Research Database (Denmark)

    Boxenbaum, Eva

    2004-01-01

    of inter-organizational networks, and actors embedded in multiple fields. The making of the proto-institution is intentional, yet the institutional building blocks and the apparent interests of actors are institutionally embedded. The results from this micro-dynamic analysis suggest revisions to current...... conceptualizations of institutional change processes. Keywords: Institutional change, proto-institution, cognition, institutional entrepreneurship, innovation, collaborative networks....

  17. Channeling and related crystal effects

    International Nuclear Information System (INIS)

    Uggerhoj, Erik

    1995-01-01

    Channeling, the interaction of particles with oriented crystals, has been applied in a wide variety of scientific and technological areas. A workshop at Aarhus, Denmark, this summer highlighted progress and future directions. Radiation emission has been explored and linked to coherent bremsstrahlung and other oriented crystal radiations. Dramatic effects have been found for ultra-relativistic electrons with Lorentz factors of 105 6. Single crystals are unique for investigations of quantum electrodynamics in strong external fields because probabilities for processes in axial/ planar fields are determined by the magnitude of these fields in the particle rest frame. Erik Uggerhoj of Aarhus reported on an extensive series of experiments concerning radiation emission, pair production, and shower formation carried out at CERN by the NA43 collaboration. As Vladimir Baier of Novosibirsk and Yuri Kononets of Kurchatov noted, theoretical treatment of these interconnected radiation distributions is challenging and much work needs to be done. In general, the agreement with the CERN experiments is good, but many areas like polarization phenomena and particle production need investigation. Prominent among high energy applications is extraction from accelerators. At the workshop, Alexei Asseev reported on beam extraction using a bent crystal at Serpukhov. Konrad Elsener and Jukka Klem reviewed recent CERN SPS studies driven by the possibility of using crystals for extraction of LHC beams. Thornton Murphy of Fermilab announced a step in that direction, with a demonstration this summer of extraction from the Tevatron at 900 GeV. Bent crystal channeling is also used for handling extracted high energy beams. Niels Doble presented a beautiful example of a beam for the CERN NA48 CP-violation experiment. Yuri Chesnokov reported that beams had been deflected through angles up to 150 milliradians at Serpukhov

  18. Characterization of PbWO4 crystals for high-energy physics experiments

    Science.gov (United States)

    Kim, M. J.; Park, H.; Kim, H. J.

    2016-09-01

    High-energy physics (HEP) experiments have employed many new types of scintillators. Specifically, bismuth germanate, thallium-doped cesium iodide, and lead tungstate (PbWO4, PWO) have been used for the L3 experiment; CLEO II, Belle and BES-III; and CMS, respectively. PWO has particularly beneficial properties, such as high density, fast decay time, short radiation length and radiation hardness. In this study, we tested the PWO crystals at low temperatures to determine their applicability in future calorimeters. Various crystals from the Proton Antiproton Annihilations at Darmstadt (PANDA) experiment in Giessen, the Bogoroditsk Techno-Chemical Plant (BTCP) in Russia and by Shanghai Institute of Ceramics, Chinese Academy of Sciences (SICCAS) in China were investigated. We studied the scintillation properties of PWO crystals, such as their X-ray luminescence, relative light yields, absolute light yields, energy resolutions, decay times and longitudinal uniformities of their light yields. In addition, we measured the temperature dependences of the light yields and decay times by using a 137Cs γ-ray source. The emission spectra of the PWO crystals consisted of a broad band from 350 nm to 700 nm, and the peak emission wavelength in each spectrum was 420 nm. The emission spectra of the PWO crystals from SICCAS were slightly shifted to longer wavelengths compared with those of the crystals from the other institutions.

  19. In-situ temperature field measurements and direct observation of crystal/melt at vertical Bridgman growth of lead chloride under stationary and dynamic arrangement

    Czech Academy of Sciences Publication Activity Database

    Král, Robert; Nitsch, Karel

    2015-01-01

    Roč. 427, Oct (2015), 7-15 ISSN 0022-0248 R&D Projects: GA MŠk(CZ) LH14266 Institutional support: RVO:68378271 Keywords : single crystal growth * temperature field measurements * crystal/melt interface * lead chloride * vertical Bridgman method Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 1.462, year: 2015

  20. Crystal study and econometric model

    Science.gov (United States)

    1975-01-01

    An econometric model was developed that can be used to predict demand and supply figures for crystals over a time horizon roughly concurrent with that of NASA's Space Shuttle Program - that is, 1975 through 1990. The model includes an equation to predict the impact on investment in the crystal-growing industry. Actually, two models are presented. The first is a theoretical model which follows rather strictly the standard theoretical economic concepts involved in supply and demand analysis, and a modified version of the model was developed which, though not quite as theoretically sound, was testable utilizing existing data sources.

  1. Metadynamics studies of crystal nucleation

    Science.gov (United States)

    Giberti, Federico; Salvalaglio, Matteo; Parrinello, Michele

    2015-01-01

    Crystallization processes are characterized by activated events and long timescales. These characteristics prevent standard molecular dynamics techniques from being efficiently used for the direct investigation of processes such as nucleation. This short review provides an overview on the use of metadynamics, a state-of-the-art enhanced sampling technique, for the simulation of phase transitions involving the production of a crystalline solid. In particular the principles of metadynamics are outlined, several order parameters are described that have been or could be used in conjunction with metadynamics to sample nucleation events and then an overview is given of recent metadynamics results in the field of crystal nucleation. PMID:25866662

  2. Metadynamics studies of crystal nucleation

    Directory of Open Access Journals (Sweden)

    Federico Giberti

    2015-03-01

    Full Text Available Crystallization processes are characterized by activated events and long timescales. These characteristics prevent standard molecular dynamics techniques from being efficiently used for the direct investigation of processes such as nucleation. This short review provides an overview on the use of metadynamics, a state-of-the-art enhanced sampling technique, for the simulation of phase transitions involving the production of a crystalline solid. In particular the principles of metadynamics are outlined, several order parameters are described that have been or could be used in conjunction with metadynamics to sample nucleation events and then an overview is given of recent metadynamics results in the field of crystal nucleation.

  3. Crystallization inhibitors for amorphous oxides

    International Nuclear Information System (INIS)

    Reznitskij, L.A.; Filippova, S.E.

    1993-01-01

    Data for the last 10 years, in which experimental results of studying the temperature stabilization of x-ray amorphous oxides (including R 3 Fe 5 O 12 R-rare earths, ZrO 2 , In 2 O 3 , Sc 2 O 3 ) and their solid solution are presented, are generalized. Processes of amorphous oxide crystallization with the production of simple oxides, solid solutions and chemical compounds with different polyhedral structure, are investigated. Energy and crystallochemical criteria for selecting the doping inhibitor-components stabilizing the amorphous state are ascertained, temperatures and enthalpies of amorpous oxide crystallization are determined, examination of certain provisions of iso,orphous miscibility theory is conducted

  4. Fundamentals of liquid crystal devices

    CERN Document Server

    Yang, Deng-Ke

    2014-01-01

    Revised throughout to cover the latest developments in the fast moving area of display technology, this 2nd edition of Fundamentals of Liquid Crystal Devices, will continue to be a valuable resource for those wishing to understand the operation of liquid crystal displays. Significant updates include new material on display components, 3D LCDs and blue-phase displays which is one of the most promising new technologies within the field of displays and it is expected that this new LC-technology will reduce the response time and the number of optical components of LC-modules. Prof. Yang is a pion

  5. Liquid Crystals for Nondestructive Evaluation

    Science.gov (United States)

    1978-09-01

    polarizers (e.g., where p is the distance of alignment or pitch, X is the Nicol, Rochon, and Wollaston prisms ) are based upon peak wavelength of scattered...RANGE OF so 45" 45 - EVENT SEVENT T(°C) TEMPERATUJRE TC)4"TEMPERATURE 40RANGE OF T(°) 0-RANGE OF 40LIQUID ’ ൫" CRYSTAL S 36 3S. 30 0 IS 90 180 - I...Temperatures TI > T2 > - > TS defects was possible using the liquid crystal. are the Average TemperatursI Thes Resptivegi. Kapfer , Burns, Salvo, and Doyle

  6. Lattice dynamics of ionic crystals

    International Nuclear Information System (INIS)

    Mahan, G.D.

    1990-01-01

    The theory of lattice dynamics for ionic and rare-gas crystals is derived in the harmonic approximation. We start from a Hamiltonian and average over electron coordinates in order to obtain an effective interaction between ion displacements. We assume that electronic excitations are localized on a single ion, which limits the theory to ionic crystals. The deformation-dipole model and the indirect-ionic-interaction model are derived. These two contributions are closely linked, and together provide an accurate description of short-range forces

  7. Gamma-ray relative energy response of Ce: YAG crystal

    International Nuclear Information System (INIS)

    Zhang Jianhua; Zhang Chuanfei; Hu Mengchun; Peng Taiping; Wang Zhentong; Tang Dengpan; Zhao Guangjun

    2010-01-01

    Gamma-ray relative energy response of Ce: YAG crystal, which is important for pulsed γ-ray measurement, was studied in this work.The Ce: YAG crystal, which was developed at Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, was aligned point by point with γ-rays scattered from an industrial 60 Co line source. The γ-ray relative energy response was calculated using the mass attenuation coefficient. The results show that the numerical calculation method of γ-ray relative energy response is reliable, and the experimental method with multi-energy point γ-ray by Compton scattering is also feasible, that can be used for checking up correctness of the numerical calculation results. (authors)

  8. Functional possibilities of nonlinear crystals for frequency conversion: uniaxial crystals

    Energy Technology Data Exchange (ETDEWEB)

    Andreev, Yu M [Institute of Monitoring of Climatic and Ecological Systems, Siberian Branch of the Russian Academy of Sciences, Tomsk (Russian Federation); Arapov, Yu D; Kasyanov, I V [E.I. Zababakhin All-Russian Scientific-Research Institute of Technical Physics, Russian Federal Nuclear Centre, Snezhinsk, Chelyabinsk region (Russian Federation); Grechin, S G; Nikolaev, P P [N.E. Bauman Moscow State Technical University, Moscow (Russian Federation)

    2016-01-31

    The method and results of the analysis of phase-matching and nonlinear properties for all point groups of symmetry of uniaxial crystals that determine their functional possibilities for solving various problems of nonlinear frequency conversion of laser radiation are presented. (nonlinear optical phenomena)

  9. Liquid Crystals in Decorative and Visual Arts

    Science.gov (United States)

    Makow, David

    The following sections are included: * INTRODUCTION * PIGMENT AND STRUCTURAL COLOURS AND THEIR RELEVANCE TO LIQUID CRYSTALS * LIQUID CRYSTAL MATERIALS AND TECHNIQUES FOR DECORATIVE AND VISUAL ARTS * Free cholesteric liquid crystals (FCLC's) * Encapsulated liquid crystals (ECLC's) * Nonsteroid Chiral nematics * Polymers with liquid crystalline properties (PLCs) * COLOUR PROPERTIES OF CHOLESTERIC LIQUID CRYSTALS (CLC's) * Molecular structure and the mechanism of colour production * Dependence of perceived colours on the angle of illumination and viewing * Dependence of perceived colours on temperature * Additive colour properties * Methods of doubling the peak reflectance of cholesteric liquid crystals * Colour gamut * Colours of superimposed and pigmented coatings * Colours in transmission * ACKNOWLEDGEMENTS * REFERENCES

  10. Introduction to crystal growth and characterization

    CERN Document Server

    Benz, Klaus-Werner

    2014-01-01

    This new textbook provides for the first time a comprehensive treatment of the basics of contemporary crystallography and crystal growth in a single volume. The reader will be familiarized with the concepts for the description of morphological and structural symmetry of crystals. The architecture of crystal structures of selected inorganic and molecular crystals is illustrated. The main crystallographic databases as data sources of crystal structures are described. Nucleation processes, their kinetics and main growth mechanism will be introduced in fundamentals of crystal growth. Some phase d

  11. Lunar Magma Ocean Crystallization: Constraints from Fractional Crystallization Experiments

    Science.gov (United States)

    Rapp, J. F.; Draper, D. S.

    2015-01-01

    The currently accepted paradigm of lunar formation is that of accretion from the ejecta of a giant impact, followed by crystallization of a global scale magma ocean. This model accounts for the formation of the anorthosite highlands crust, which is globally distributed and old, and the formation of the younger mare basalts which are derived from a source region that has experienced plagioclase extraction. Several attempts at modelling the crystallization of such a lunar magma ocean (LMO) have been made, but our ever-increasing knowledge of the lunar samples and surface have raised as many questions as these models have answered. Geodynamic models of lunar accretion suggest that shortly following accretion the bulk of the lunar mass was hot, likely at least above the solidus]. Models of LMO crystallization that assume a deep magma ocean are therefore geodynamically favorable, but they have been difficult to reconcile with a thick plagioclase-rich crust. A refractory element enriched bulk composition, a shallow magma ocean, or a combination of the two have been suggested as a way to produce enough plagioclase to account for the assumed thickness of the crust. Recently however, geophysical data from the GRAIL mission have indicated that the lunar anorthositic crust is not as thick as was initially estimated, which allows for both a deeper magma ocean and a bulk composition more similar to the terrestrial upper mantle. We report on experimental simulations of the fractional crystallization of a deep (approximately 100km) LMO with a terrestrial upper mantle-like (LPUM) bulk composition. Our experimental results will help to define the composition of the lunar crust and mantle cumulates, and allow us to consider important questions such as source regions of the mare basalts and Mg-suite, the role of mantle overturn after magma ocean crystallization and the nature of KREEP

  12. NATO Advanced Research Workshop on Incommensurate Crystals, Liquid Crystals, and Quasi-Crystals

    CERN Document Server

    Clark, N

    1988-01-01

    In this NATO-sponsored Advanced Research Workshop we succeeded in bringing together approximately forty scientists working in the three main areas of structurally incommensurate materials: incommensurate crystals (primarily ferroelectric insulators), incommensurate liquid crystals, and metallic quasi-crystals. Although these three classes of materials are quite distinct, the commonality of the physics of the origin and descrip­ tion of these incommensurate structures is striking and evident in these proceedings. A measure of the success of this conference was the degree to which interaction among the three subgroups occurred; this was facili­ tated by approximately equal amounts of theory and experiment in the papers presented. We thank the University of Colorado for providing pleasant housing and conference facilities at a modest cost, and we are especially grate­ ful to Ann Underwood, who retyped all the manuscripts into camera-ready form. J. F. Scott Boulder, Colorado N. A. Clark v CONTENTS PART I: INCO...

  13. Magnetic properties of a hydrogenation-extracted UCoSn single crystal

    Czech Academy of Sciences Publication Activity Database

    Kolomiets, A.; Andreev, Alexander V.; Havela, L.

    2009-01-01

    Roč. 471, 1-2 (2009), s. 21-23 ISSN 0925-8388 R&D Projects: GA MŠk OC 144 Institutional research plan: CEZ:AV0Z10100520 Keywords : uranium intermetallics * single crystal * ferromagnetism * hydrides Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 2.135, year: 2009

  14. Transition between metamaterial and photonic-crystal behavior in arrays of dielectric rods

    Czech Academy of Sciences Publication Activity Database

    Dominec, Filip; Kadlec, Christelle; Němec, Hynek; Kužel, Petr; Kadlec, Filip

    2014-01-01

    Roč. 22, č. 25 (2014), s. 30492-30503 ISSN 1094-4087 R&D Projects: GA ČR(CZ) GA14-25639S Institutional support: RVO:68378271 Keywords : metamaterials * photonic crystals * negative refractive index * dielectrics Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 3.488, year: 2014

  15. Synthesis, characterization and crystal structures of new organic compounds containing cyanoacrylic acid

    Czech Academy of Sciences Publication Activity Database

    Khalaji, A.D.; Mogheiseh, M.; Eigner, Václav; Dušek, Michal; Chow, T.J.; Maddahi, E.

    2015-01-01

    Roč. 1098, Oct (2015), s. 318-323 ISSN 0022-2860 R&D Projects: GA ČR(CZ) GA14-03276S Institutional support: RVO:68378271 Keywords : organic compounds * cyanoacrylic acid * single-crystal structure analysis * dye-sensitized solar cells * density functional theory Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 1.780, year: 2015

  16. Influence of seeding on crystallization behaviour of BaNaB9 glasses

    Indian Academy of Sciences (India)

    Administrator

    Influence of seeding on crystallization behaviour of BaNaB9. O15 glasses. RAHUL VAISH and K B R VARMA*. Materials Research Centre, Indian Institute of Science, Bangalore 560 012, India. MS received 18 August 2008. Abstract. Transparent BaNaB9O15 (BNBO) glasses were fabricated via the conventional melt- ...

  17. Crystallization processes in Ge2Sb2Se4Te glass

    Czech Academy of Sciences Publication Activity Database

    Svoboda, R.; Bezdička, Petr; Gutwirth, J.; Malek, J.

    2015-01-01

    Roč. 61, JAN (2015), s. 207-214 ISSN 0025-5408 Institutional support: RVO:61388980 Keywords : Chalcogenides * Glass es * Differential scanning calorimetry (DSC) * X-ray diffraction * Crystal structure Subject RIV: CA - Inorganic Chemistry Impact factor: 2.435, year: 2015

  18. Stress induced martensitic transformations in tension/torsion of CuAlNi single crystal tube

    Czech Academy of Sciences Publication Activity Database

    Šittner, Petr; Hashimoto, K.; Kato, M.; Tokuda, M.

    2003-01-01

    Roč. 48, - (2003), s. 1153-1159 ISSN 1359-6462 R&D Projects: GA AV ČR IAA1048107 Institutional research plan: CEZ:AV0Z1010914 Keywords : shape memory alloys(SMAs) * martensitic phase transformation * single crystal tube * tension test * torsion Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 1.633, year: 2003

  19. Quasi-static crack tip fields in rate-sensitive FCC single crystals

    Indian Academy of Sciences (India)

    In this work, the effects of loading rate, material rate sensitivity and constraint level on quasi-static crack tip fields in a FCC single crystal are studied. ... Global General Motors R&D, India Science Lab, GM Technical Centre (India), Bangalore 560 066, India; Department of Mechanical Engineering, Indian Institute of Science, ...

  20. Crystal structure determination from powder diffraction data of the coumarin vanillin chalcone

    Czech Academy of Sciences Publication Activity Database

    Ghouili, A.; Rohlíček, Jan; Ayed, T.B.; Hassen, R.B.

    2014-01-01

    Roč. 29, č. 4 (2014), s. 361-365 ISSN 0885-7156 Grant - others:AV ČR(CZ) Praemium Academiae Institutional support: RVO:68378271 Keywords : chalcone * absorption spectra * powder diffraction * crystal structure determination * coumarin derivatives Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 0.636, year: 2014

  1. H-1 NMR relaxometric study of molecular dynamics in a "de Vries" liquid crystal

    Czech Academy of Sciences Publication Activity Database

    Gradišek, A.; Domenici, V.; Apih, T.; Novotná, Vladimíra; Sebastiao, P.J.

    2016-01-01

    Roč. 120, č. 20 (2016), s. 4706-4714 ISSN 1520-6106 Grant - others:AVČR(CZ) M100101204 Institutional support: RVO:68378271 Keywords : liquid crystals Subject RIV: JJ - Other Materials Impact factor: 3.177, year: 2016

  2. Crystal structure and transport properties of Pd5HgSe

    Czech Academy of Sciences Publication Activity Database

    Laufek, F.; Vymazalová, A.; Drábek, M.; Navrátil, Jiří; Plecháček, T.; Drahokoupil, Jan

    2012-01-01

    Roč. 14, č. 10 (2012), s. 1476-1479 ISSN 1293-2558 R&D Projects: GA ČR GAP108/10/1315 Institutional support: RVO:61389013 ; RVO:68378271 Keywords : Pd5HgSe * Pd-Hg-Se system * crystal structure Subject RIV: CA - Inorganic Chemistry Impact factor: 1.671, year: 2012

  3. Crystal field effect in YbMnO.sub.3./sub..

    Czech Academy of Sciences Publication Activity Database

    Diviš, M.; Hölsä, J.; Lastusaari, M.; Litvinchuk, A. P.; Nekvasil, Vladimír

    2008-01-01

    Roč. 451, 1-2 (2008), s. 662-665 ISSN 0925-8388 R&D Projects: GA AV ČR IAA100100627 Institutional research plan: CEZ:AV0Z10100521 Keywords : ytterbium * manganites * IR spectroscopy * crystal field Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 1.510, year: 2008

  4. High-temperature and low-stress creep anisotropy of single-crystal superalloys

    Czech Academy of Sciences Publication Activity Database

    Jacome, L. A.; Nortershauser, P.; Heyer, J. K.; Lahni, A.; Frenzel, J.; Dlouhý, Antonín; Somsen, C.; Eggeler, G.

    2013-01-01

    Roč. 61, č. 8 (2013), s. 2926-2943 ISSN 1359-6454 R&D Projects: GA ČR(CZ) GA202/09/2073 Institutional support: RVO:68081723 Keywords : superalloy single crystals * creep anisotropy * rafting * dislocations * deformation mechanisms Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 3.940, year: 2013

  5. Xenon NMR of liquid crystals confined to cylindrical nanocavities: a simulation study

    Czech Academy of Sciences Publication Activity Database

    Karjalainen, J.; Vaara, J.; Straka, Michal; Lantto, P.

    2015-01-01

    Roč. 17, č. 11 (2015), s. 7158-7171 ISSN 1463-9076 R&D Projects: GA ČR(CZ) GA14-03564S Institutional support: RVO:61388963 Keywords : 129Xe NMR * liquid crystals * cylindrical cavities * phase transition s * Monte-Carlo simulations Subject RIV: CF - Physical ; Theoretical Chemistry Impact factor: 4.449, year: 2015

  6. Detection of low concentration of malachite green and crystal violet in water

    Czech Academy of Sciences Publication Activity Database

    Šafařík, Ivo; Šafaříková, Miroslava

    2002-01-01

    Roč. 36, - (2002), s. 196-200 ISSN 0043-1354 R&D Projects: GA ČR GA203/98/1145 Institutional research plan: CEZ:AV0Z6087904 Keywords : magnetic particles * crystal violet Subject RIV: EH - Ecology, Behaviour Impact factor: 1.611, year: 2002

  7. Crystal field and magnetism with Wannier functions: rare-earth dopedaluminum garnets

    Czech Academy of Sciences Publication Activity Database

    Mihóková, Eva; Novák, Pavel; Laguta, Valentyn

    2015-01-01

    Roč. 33, č. 12 (2015), 1316-1323 ISSN 1002-0721 R&D Projects: GA ČR GA13-09876S Institutional support: RVO:68378271 Keywords : crystal field * ab initio calculations * garnets * rare earths Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 2.188, year: 2015

  8. A kinetic model of the transformation of a micropatterned amorphous precursor into a porous single crystal

    Czech Academy of Sciences Publication Activity Database

    Fratzl, P.; Fischer, F. D.; Svoboda, Jiří; Aizenberg, J.

    2010-01-01

    Roč. 6, č. 3 (2010), s. 1001-1005 ISSN 1742-7061 R&D Projects: GA MŠk(CZ) OC10029 Institutional research plan: CEZ:AV0Z20410507 Keywords : Phase transformation * Crystallization * Nucleation and growth Subject RIV: BJ - Thermodynamics Impact factor: 4.824, year: 2010

  9. New banana-type liquid crystal with a methoxy group substituted near the central ring

    Czech Academy of Sciences Publication Activity Database

    Kašpar, Miroslav; Hamplová, Věra; Novotná, Vladimíra; Glogarová, Milada; Vaněk, Přemysl

    2002-01-01

    Roč. 12, - (2002), s. 2221-2224 ISSN 0959-9428 Institutional research plan: CEZ:AV0Z1010914 Keywords : bent-shaped liquid crystal * nm-chiral * B 2 phase Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 2.683, year: 2002

  10. Recent R&D trends in inorganic single crystal scintillator materials for radiation detection

    Czech Academy of Sciences Publication Activity Database

    Nikl, Martin; Yoshikawa, A.

    2015-01-01

    Roč. 3, č. 4 (2015), s. 463-481 ISSN 2195-1071 R&D Projects: GA MŠk(CZ) LH14266; GA ČR GAP204/12/0805 Institutional support: RVO:68378271 Keywords : scintillator * single crystal * luminescence Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 5.359, year: 2015

  11. EPR study of charge compensation of chromium centers in the strontium titanate crystal

    Czech Academy of Sciences Publication Activity Database

    Badalyan, A. G.; Azamat, Dmitry; Babunts, R.A.; Neverova, E.V.; Dejneka, Alexandr; Trepakov, Vladimír; Jastrabík, Lubomír

    2013-01-01

    Roč. 55, č. 7 (2013), 1454-1458 ISSN 1063-7834 R&D Projects: GA ČR GAP108/12/1941 Institutional support: RVO:68378271 Keywords : EPR spectroscopy * SrTiO3:Cr crystal * chromium centers Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 0.782, year: 2013

  12. Nucleation of polypropylene crystallization with gold nanoparticles. Part 2: relation between particle morphology and nucleation activity

    Czech Academy of Sciences Publication Activity Database

    Šlouf, Miroslav; Vacková, Taťana; Zhigunov, Alexander; Sikora, Antonín; Piorkowska, E.

    2016-01-01

    Roč. 55, č. 4 (2016), s. 393-410 ISSN 0022-2348 R&D Projects: GA ČR GAP205/10/0348; GA ČR(CZ) GA14-17921S Institutional support: RVO:61389013 Keywords : crystallization * gold nanoparticles * isotactic polyproplylene Subject RIV: JJ - Other Materials Impact factor: 0.828, year: 2016

  13. The study of crystal structures and vibrational spectra of inorganicsalts of 2,4-diaminopyrimidine

    Czech Academy of Sciences Publication Activity Database

    Matulková, I.; Mathauserová, J.; Císařová, I.; Němec, I.; Fábry, Jan

    2016-01-01

    Roč. 1103, Jan (2016), s. 82-93 ISSN 0022-2860 R&D Projects: GA ČR GA14-05506S Institutional support: RVO:68378271 Keywords : salts of 2,4-diaminopyrimidine * single crystal X-ray structural analysis * vibrational spectra Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 1.753, year: 2016

  14. Crystal structure determination of CoGeTe from powder diffraction data

    Czech Academy of Sciences Publication Activity Database

    Laufek, F.; Navrátil, Jiří; Plášil, J.; Plecháček, T.

    2008-01-01

    Roč. 460, č. 1-2 (2008), s. 155-159 ISSN 0925-8388 R&D Projects: GA ČR GA203/07/0267 Institutional research plan: CEZ:AV0Z40500505 Keywords : crystal structure Subject RIV: CA - Inorganic Chemistry Impact factor: 1.510, year: 2008

  15. A simple method of evaluating non-isothermal crystallization kinetics in multicomponent polymer systems

    Czech Academy of Sciences Publication Activity Database

    Kratochvíl, Jaroslav; Kelnar, Ivan

    2015-01-01

    Roč. 47, October (2015), s. 79-86 ISSN 0142-9418 R&D Projects: GA ČR(CZ) GA13-15255S Institutional support: RVO:61389013 Keywords : non-isothermal crystallization kinetics * cumulative curves * inflection point Subject RIV: JI - Composite Materials Impact factor: 2.350, year: 2015

  16. Broadband infrared detectors on the basis of PATGS/Pt(IV) single crystals

    Czech Academy of Sciences Publication Activity Database

    Novotný, Jan; Zelinka, Jiří; Moravec, František

    2005-01-01

    Roč. 119, č. 2 (2005), s. 300-304 ISSN 0924-4247 R&D Projects: GA MŠk(CZ) 1P04OCD14.40 Institutional research plan: CEZ:AV0Z20670512 Keywords : crystal growth * ferroelectric materials * sensors Subject RIV: CF - Physical ; Theoretical Chemistry Impact factor: 1.363, year: 2005

  17. INFLUENCE OF RARE-EARTH ELEMENTS ON THE ELECTRICAL AND OPTICAL PROPERTIES OF INP BULK CRYSTALS

    Czech Academy of Sciences Publication Activity Database

    Yatskiv, Roman; Zavadil, Jiří; Pekárek, Ladislav

    -, - (2011), s. 58-65 ISSN 1335-9053. [Development of Materials Science in Research and Education . Závažná Poruba, 31.08.2009-04.09.2009] Institutional research plan: CEZ:AV0Z20670512 Keywords : Crystal growth * REEs elements * Electrical properties Subject RIV: JA - Electronics ; Optoelectronics, Electrical Engineering

  18. Ledges and grooves at γ/γ′ interfaces of single crystal superalloys

    Czech Academy of Sciences Publication Activity Database

    Parsa, A. B.; Wollgramm, P.; Buck, H.; Kostka, A.; Somsen, C.; Dlouhý, Antonín; Eggeler, G.

    2015-01-01

    Roč. 90, MAY (2015), s. 105-117 ISSN 1359-6454 R&D Projects: GA ČR(CZ) GA14-22834S Institutional support: RVO:68081723 Keywords : Ni-base single crystal superalloys * γ/γ′ interfaces * Interface dislocations * Rafting * Grooves Subject RIV: JG - Metallurgy Impact factor: 5.058, year: 2015

  19. Nonlinear absorption of fullerene- and nanotubes-doped liquid crystal systems

    Czech Academy of Sciences Publication Activity Database

    Kamanina, N.; Reshak, Ali H; Vasiliev, P.Y.; Vangonen, A. I.; Studeonov, V. I.; Usanov, Y. E.; Ebothe, J.; Gondek, E.; Wojcik, W.; Danel, A.

    2009-01-01

    Roč. 41, č. 3 (2009), s. 391-394 ISSN 1386-9477 Institutional research plan: CEZ:AV0Z60870520 Keywords : nonlinear absorption properties * organic electrooptical systems * liquid crystal * fullerene s * nanotubes * PVK-derivatives Subject RIV: BO - Biophysics Impact factor: 1.177, year: 2009

  20. Luminescence-induced noise in single photon sources based on BBO crystals

    Czech Academy of Sciences Publication Activity Database

    Machulka, R.; Lemr, Karel; Haderka, Ondřej; Lamperti, M.; Allevi, A.; Bondani, M.

    2014-01-01

    Roč. 47, č. 21 (2014), s. 215501 ISSN 0953-4075 R&D Projects: GA ČR GAP205/12/0382 Institutional support: RVO:68378271 Keywords : luminescence * BBO crystal * photon source * noise * streak camera Subject RIV: BH - Optics , Masers, Lasers Impact factor: 1.975, year: 2014

  1. CrystalCMP: an easy-to-use tool for fast comparison of molecular packing

    Czech Academy of Sciences Publication Activity Database

    Rohlíček, Jan; Skořepová, E.; Babor, M.; Čejka, J.

    2016-01-01

    Roč. 49, č. 6 (2016), s. 2172-2183 ISSN 0021-8898 R&D Projects: GA ČR GA16-10035S Institutional support: RVO:68378271 Keywords : comparison * similarity packing * crystal structure * computer programs Subject RIV: JC - Computer Hardware ; Software Impact factor: 3.720, year: 2014

  2. Nonlinear magnetoelectric effect in paraelectric state of Co4Nb2O9 single crystal

    Czech Academy of Sciences Publication Activity Database

    Cao, Ym.; Deng, Gc.; Beran, Přemysl; Feng, Zj.; Kang, Bj.; Zhang, Jc.; Guiblin, N.; Dkhil, B.; Ren, W.; Cao, Sx.

    2017-01-01

    Roč. 7, č. 10 (2017), č. článku 14079. ISSN 2045-2322 Institutional support: RVO:61389005 Keywords : magnetoelectric * single crystal * neutron diffraction Subject RIV: BM - Solid Matter Physics ; Magnetism OBOR OECD: Condensed matter physics (including formerly solid state physics, supercond.) Impact factor: 4.259, year: 2016

  3. Nanodomains and nanometer-scale disorder in multiferroic bismuth ferrite single crystals

    Czech Academy of Sciences Publication Activity Database

    Jia, C.L.; Jin, L.; Wang, D.; Mi, S.B.; Alexe, M.; Hesse, D.; Reichlová, Helena; Martí, Xavier; Bellaiche, L.; Urban, K.W.

    2015-01-01

    Roč. 82, Jan (2015), s. 356-368 ISSN 1359-6454 Institutional support: RVO:68378271 Keywords : bismuth ferrite * crystal growth * high-resolution electron microscopy * atomic structure * first-principles calculations Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 5.058, year: 2015

  4. Scintillation properties of a La,Lu-admix gadolinium pyrosilicate crystal

    Czech Academy of Sciences Publication Activity Database

    Kurosawa, S.; Shishido, T.; Suzuki, A.; Sugawara, T.; Nomura, A.; Yubuta, K.; Shoji, Y.; Yokota, Y.; Pejchal, Jan; Ohashi, Y.; Kamada, K.; Yoshikawa, A.

    2015-01-01

    Roč. 784, Jun (2015), s. 115-118 ISSN 0168-9002 Institutional support: RVO:68378271 Keywords : scintillator * pyrosilicate crystal * Ce-doped (La, Lu, Gd) Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 1.200, year: 2015

  5. Lithium ions in the van der Waals gap of Bi2Se3 single crystals

    Czech Academy of Sciences Publication Activity Database

    Bludská, Jana; Jakubec, Ivo; Karamazov, S.; Horák, Jaromír; Uher, C.

    2010-01-01

    Roč. 183, č. 12 (2010), s. 2813-2817 ISSN 0022-4596 Institutional research plan: CEZ:AV0Z40320502 Keywords : intercalation * van Der Waals gap * Bi2Se3 crystals Subject RIV: CG - Electrochemistry Impact factor: 2.261, year: 2010

  6. Synthesis and crystal structure of tischendorfite, Pd8Hg3Se9

    Czech Academy of Sciences Publication Activity Database

    Laufek, F.; Vymazalová, A.; Drábek, J.; Navrátil, Jiří; Drahokoupil, Jan

    2014-01-01

    Roč. 26, č. 1 (2014), s. 157-162 ISSN 0935-1221 Institutional support: RVO:68378271 Keywords : tischendorfite * crystal structure * Pd-Hg selenides Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 1.483, year: 2014

  7. Photonic Crystal Structure and Coloration of Wing Scales of Butterflies Exhibiting Selective Wavelength Iridescence

    Czech Academy of Sciences Publication Activity Database

    Mika, Filip; Matějková-Plšková, J.; Jiwajinda, S.; Dechkrong, P.; Shiojiri, M.

    2012-01-01

    Roč. 5, č. 5 (2012), s. 754-771 ISSN 1996-1944 R&D Projects: GA MŠk ED0017/01/01 Institutional support: RVO:68081731 Keywords : butterfly scale * structure color * natural photonic crystal * E. mulciber * S. charonda * C. ataxus * T. aeacus Subject RIV: JJ - Other Materials Impact factor: 2.247, year: 2012

  8. Fine structures of wing scales in Sasakia charonda butterflies as photonic crystals

    Czech Academy of Sciences Publication Activity Database

    Matějková, Jiřina; Shiojiri, S.; Shiojiri, M.

    2009-01-01

    Roč. 236, č. 2 (2009), s. 88-93 ISSN 0022-2720 Institutional research plan: CEZ:AV0Z20650511 Keywords : Butterfly * field-emission scanning electron microscopy * photonic crystal * Sasakia charonda * wing scale Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 1.612, year: 2009

  9. Drag of a Cottrell atmosphere by an edge dislocation in a smectic-A liquid crystal

    Czech Academy of Sciences Publication Activity Database

    Oswald, P.; Lejček, Lubor

    2017-01-01

    Roč. 40, č. 10 (2017), s. 84-93 ISSN 1292-8941 Institutional support: RVO:68378271 Keywords : soft matter * liquid crystal Subject RIV: BE - Theoretical Physics OBOR OECD: Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect) Impact factor: 1.464, year: 2016

  10. Crystal field and magnetism with Wannier functions: Orthorhombic rare-earth manganites

    Czech Academy of Sciences Publication Activity Database

    Novák, Pavel; Nekvasil, Vladimír; Knížek, Karel

    358-359, MAY (2014), s. 228-232 ISSN 0304-8853 R&D Projects: GA ČR GA13-25251S Institutional support: RVO:68378271 Keywords : crystal field * rare- earth magnetism Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 1.970, year: 2014

  11. Alloy hardening of a smectic A liquid crystal doped with gold nanoparticles

    Czech Academy of Sciences Publication Activity Database

    Oswald, P.; Milette, J.; Relaix, S.; Reven, L.; Dequidt, A.; Lejček, Lubor

    2013-01-01

    Roč. 103, AUG (2013), "46004-p1"-"46004-p6" ISSN 0295-5075 Institutional support: RVO:68378271 Keywords : smectic A liquid crystals * gold nanoparticles * edge dislocation * precipitation hardening Subject RIV: BK - Fluid Dynamics Impact factor: 2.269, year: 2013

  12. CW frequency doubling of 1029 nm radiation using single pass bulk and waveguide PPLN crystals

    Czech Academy of Sciences Publication Activity Database

    Chiodo, N.; Du Burck, F.; Hrabina, Jan; Candela, Y.; Wallerand, J. P.; Acef, O.

    2013-01-01

    Roč. 311, 15 January (2013), s. 239-244 ISSN 0030-4018 R&D Projects: GA ČR GPP102/11/P820 Institutional support: RVO:68081731 Keywords : IR laser * second harmonic generation * waveguide and bulk crystals * periodically poled lithium niobate * 1029 nm wavelength Subject RIV: BH - Optics , Masers, Lasers Impact factor: 1.542, year: 2013

  13. Characterization of external refractive index sensitivity of a photonic crystal fiber long-period grating

    Czech Academy of Sciences Publication Activity Database

    Tian, F.; Kaňka, Jiří; Du, H.

    2015-01-01

    Roč. 13, č. 7 (2015), s. 0705011-0705013 ISSN 1671-7694 R&D Projects: GA MŠk(CZ) LH11038 Institutional support: RVO:67985882 Keywords : Carbon dioxide lasers * Crystal whiskers * Optical fiber fabrication Subject RIV: JA - Electronics ; Optoelectronics, Electrical Engineering Impact factor: 1.899, year: 2015

  14. Photonic crystal fiber for layer-by-layer assembly and measurements of polyelectrolyte thin films

    Czech Academy of Sciences Publication Activity Database

    Tian, F.; Kaňka, Jiří; Sukhishvili, S.; Du, H.

    2012-01-01

    Roč. 37, č. 20 (2012), s. 4299-4301 ISSN 0146-9592 R&D Projects: GA MŠk(CZ) LH11038 Institutional support: RVO:67985882 Keywords : Photonic crystal fiber * Long-period grating * Optical sensors Subject RIV: JA - Electronics ; Optoelectronics, Electrical Engineering Impact factor: 3.385, year: 2012

  15. Structure fits the purpose: photonic crystal fibers for evanescent-field surface-enhanced Raman spectroscopy

    Czech Academy of Sciences Publication Activity Database

    Oo, M. K .K.; Han, Y.; Kaňka, Jiří; Sukhishvili, S.; Du, H.

    2010-01-01

    Roč. 35, č. 4 (2010), s. 466-468 ISSN 0146-9592 R&D Projects: GA ČR GA102/08/1719 Institutional research plan: CEZ:AV0Z20670512 Keywords : Photonic crystal fiber * Raman spectroscopy * Fiber-optic evanescent sensor Subject RIV: JA - Electronics ; Optoelectronics, Electrical Engineering Impact factor: 3.316, year: 2010

  16. The nature of hydrogen bonding in R-2(2)(8) crystal motifs - a computational exploration

    Czech Academy of Sciences Publication Activity Database

    Deepa, Palanisamy; Solomon, R. V.; Vedha, S. A.; Kolandaivel, P.; Venuvanalingam, P.

    2014-01-01

    Roč. 112, č. 24 (2014), s. 3195-3205 ISSN 0026-8976 Institutional support: RVO:61388963 Keywords : NCI plot * hydrogen bonds * R-2(2)(8) motif * organic crystals * NBO * QTAIM analysis Subject RIV: CF - Physical ; Theoretical Chemistry Impact factor: 1.720, year: 2014

  17. INTRAMOLECULAR ALKOXIDE-TETHERED PERMETHYLTITANOCENE(III) COMPLEXES - SYNTHESIS AND CRYSTAL STRUCTURE

    Czech Academy of Sciences Publication Activity Database

    Varga, V.; Císařová, I.; Horáček, Michal; Pinkas, Jiří; Kubišta, Jiří; Mach, Karel

    2009-01-01

    Roč. 74, č. 3 (2009), s. 453-468 ISSN 0010-0765 R&D Projects: GA MPO FT-TA3/078; GA MŠk(CZ) LC06070 Institutional research plan: CEZ:AV0Z40400503 Keywords : titanocene * Permethyltitanocene * crystal structure Subject RIV: BL - Plasma and Gas Discharge Physics Impact factor: 0.856, year: 2009

  18. Synthesis crystal stuctrure and thermoelectric properties of the ternary skutterudite Fe2Pd2Sb12

    Czech Academy of Sciences Publication Activity Database

    Navrátil, Jiří; Laufek, F.; Plecháček, T.; Plášil, J.

    2010-01-01

    Roč. 493, 1-2 (2010), s. 50-54 ISSN 0925-8388 R&D Projects: GA ČR GA203/07/0267 Institutional research plan: CEZ:AV0Z40500505 Keywords : Fe2Pd2Sb12 * crystal structure * skutterudite Subject RIV: CA - Inorganic Chemistry Impact factor: 2.138, year: 2010

  19. Synthesis, characterization, crystal structures, QSAR study and antibacterial activities of organotin bisphosphoramidates

    Czech Academy of Sciences Publication Activity Database

    Gholivand, K.; Valmoozi, A.A.E.; Gholami, A.; Dušek, Michal; Eigner, Václav; Abolghasemi, S.

    2016-01-01

    Roč. 806, Mar (2016), s. 33-44 ISSN 0022-328X R&D Projects: GA ČR GA15-12653S Institutional support: RVO:68378271 Keywords : bisphosphoramidate * organotin compounds * crystal structure * antibacterial activity * QSAR Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 2.184, year: 2016

  20. Synthesis, crystal structure, spectral and thermal studies of (E)-4-dimethamino[(1-phenylethyl)iminomethyl]benzyne

    Czech Academy of Sciences Publication Activity Database

    Khalaji, A.D.; Rad, S.M.; Grivani, G.; Fejfarová, Karla; Dušek, Michal; Das, D.

    2011-01-01

    Roč. 41, č. 8 (2011), s. 1145-1149 ISSN 1074-1542 R&D Projects: GA ČR(CZ) GAP204/11/0809 Institutional research plan: CEZ:AV0Z10100521 Keywords : Shiff bases * crystal structure * X-ray diffraction Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 0.566, year: 2011

  1. Crystallization Kinetics of Nanocrystalline Materials by Combined X-ray Diffraction and Differential Scanning Calorimetry Experiments

    Czech Academy of Sciences Publication Activity Database

    Gil-González, E.; Perejón, A.; Sánchez-Jiménez, P. E.; Medina-Carrasco, S.; Kupčík, Jaroslav; Šubrt, Jan; Criado, J. M.; Pérez-Maqueda, L. A.

    2018-01-01

    Roč. 18, č. 5 (2018), s. 3107-3116 ISSN 1528-7483 Institutional support: RVO:61388980 Keywords : nanocrysalline alloys * combined X ray diffraction * crystallization kinetics Subject RIV: CA - Inorganic Chemistry OBOR OECD: Inorganic and nuclear chemistry Impact factor: 4.055, year: 2016

  2. Crystal growth and scintillation properties of Ce-doped sodium calcium lutetium complex fluoride

    Czech Academy of Sciences Publication Activity Database

    Wakahara, S.; Furuya, Y.; Yanagida, T.; Yokota, Y.; Pejchal, Jan; Sugiyama, M.; Kawaguchi, N.; Totsuka, D.; Yoshikawa, A.

    2012-01-01

    Roč. 34, č. 4 (2012), s. 729-732 ISSN 0925-3467 Institutional research plan: CEZ:AV0Z10100521 Keywords : scintillator * micro-pulling-down method * single crystal * gamma-ray stopping power Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 1.918, year: 2012

  3. Charge carrier transport in layers of discotic liquid crystals as studied by transient photocurrents

    Czech Academy of Sciences Publication Activity Database

    Rybak, A.; Pfleger, Jiří; Jung, J. Y.; Pavlík, Martin; Glowacki, I.; Ulanski, J.; Tomovic, Z.; Müllen, K.; Geerts, Y.

    2006-01-01

    Roč. 156, 2-4 (2006), s. 302-309 ISSN 0379-6779 Grant - others:NANOFUN-POLY(PL) 5709/R04/R05 Institutional research plan: CEZ:AV0Z40500505 Keywords : organic semiconductors * discotic liquid crystals * photoconductivity Subject RIV: CD - Macromolecular Chemistry Impact factor: 1.685, year: 2006

  4. Thermally induced crystallization of amorphous Fe40Ni40P14B6 alloy

    Czech Academy of Sciences Publication Activity Database

    Vasić, M.; Blagojević, V. A.; Begović, N. N.; Žák, Tomáš; Pavlović, V. B.; Minić, Dragica M.

    2015-01-01

    Roč. 614, AUG (2015), s. 129-136 ISSN 0040-6031 R&D Projects: GA MŠk(CZ) ED1.1.00/02.0068 Institutional support: RVO:68081723 Keywords : Amorphous alloy * Crystallization * Kinetics * Deconvolution * Impingement * Surface morphology Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 1.938, year: 2015

  5. Refikite from Krásno, Czech Republic: a crystal- and molecular-structure study

    Czech Academy of Sciences Publication Activity Database

    Pažout, R.; Sejkora, J.; Maixner, J.; Dušek, Michal; Tvrdý, J.

    2015-01-01

    Roč. 79, č. 1 (2015), s. 59-70 ISSN 0026-461X Grant - others:AV ČR(CZ) Praemium Academiae Institutional support: RVO:68378271 Keywords : refikite * crystal structure * infrared spectroscopy * Raman spectroscopy * NMR * high-resolution mass spectroscopy Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 2.212, year: 2015

  6. INSTITUTION vs. ORGANIZATION. CONCEPTUAL DELIMITATIONS

    Directory of Open Access Journals (Sweden)

    Andrea Sveda ANGEL

    2011-06-01

    Full Text Available Both organizations and institutions are social structures. On the basis of the institutions arethe formal rules and at the basis of the organizations are the interactions between peoples withcommon aims. The evolution of the institutions is explained by the institutionalism with its twoorientations: the new institutionalism and the old institutionalism. The last one was preoccupied bythe transformation of the economy and by the evolution of the technology and the newinstitutionalism explains the existence of the institutions from the individual’s point of view.Organizations were and are studied in present days from different point of views: organizationalstructure and culture, organizational change and development. The organization was classifiedaccording to several factors: aim, size, legal form, or their operational domain. Thecharacterization of the organization through metaphors such as machines, culture, brain, ororganism proves their complexity and diversity. Regarding to the relations between institution andorganization, the relationship could be characterised as interdependence because the organizationscan determine instituional changes, by offering a framework for the application of the rules.

  7. IAEA paper on institutional arrangements

    International Nuclear Information System (INIS)

    1979-01-01

    At its fifth series of meetings, Working Group 3 received a background paper prepared by the IAEA which had a threefold purpose: firstly, to provide an overview on institutional arrangements under consideration by the INFCE Working Groups; secondly, to explore potential relationships between the various institutional arrangements under consideration; and thirdly, to identify areas where further analysis might be desirable

  8. Does Institutional Theory Need Redirecting?

    DEFF Research Database (Denmark)

    Meyer, Renate; Höllerer, Markus A.

    2014-01-01

    Greenwood, Hinings and Whetten (2014) present two major criticisms of current institutional scholarship, and see need for a broad redirection: institutional organization theory, they argue, has lost sight of the claim to study organizations and, with its overwhelming focus on isomorphism and simi...

  9. Property rights institutions and investment

    OpenAIRE

    Saleh, Jahangir

    2004-01-01

    This paper examines the channels through which alternative property rights institutions affect investment. These institutions are defined by a society's enforced laws, regulations, governance mechanisms and norms concerning the use of resources. A transaction cost framework is used to analyze the incentive impact of various types of property rights, liability rules, and rules regarding con...

  10. Institute enriching students in Africa

    CERN Multimedia

    Burton, H

    2004-01-01

    In Cape Town, South Africa, the first annual African Summer Theory Institute is being held. This is a three-week conference for university science students throughout the whole of Africa, co-sponsored by Perimeter Institute as part of international outreach initiatives (1 page).

  11. Social Capital, Institutions and Trust

    NARCIS (Netherlands)

    Nooteboom, B.

    2006-01-01

    This paper analyzes the relations between social capital, institutions and trust.These concepts are full of ambiguity and confusion.This paper attempts to dissolve some of the confusion, by distinguishing trust and control, and analyzing institutional and relational conditions of trust.It presents a

  12. Institutional Interpretation of Participatory TA

    DEFF Research Database (Denmark)

    Nielsen, Rasmus Øjvind

    2014-01-01

    . The aim of the article is thus to relate the challenges of establishing and continuing pTA as a societal practice to the question of societal institutions and their logics. Towards this aim, the paper draws on a number of different theoretical directions within New Institutionalism and attempts to build...

  13. Experimentation and Bricolage on Institutions

    DEFF Research Database (Denmark)

    Cartel, Melodie; Boxenbaum, Eva; Aggeri, Franck

    This paper examines how innovative institutional arrangements are generated during processes of institutional bricolage. The aim of the paper is to highlight how an arrangement is selected among the others when many alternatives exist or are imaginable. To address this question, we present a qual...

  14. Phenomenon of ''self-cleaning'' of crystals

    International Nuclear Information System (INIS)

    Matveev, O.A.; Arkad'eva, E.N.; Goncharov, L.A.

    1975-01-01

    Crystals of germanium and cadmium telluride have been produced having the characteristics corresponding to the low content of electrically active impurities and crystal defects. The crystals have been grown under conditions of an equilibrium diffusion-concentration interaction of the impurities and crystal defects, with the donor alloying and controlling the acceptors concentration. These crystals have been studied with the help of the mass-spectral analysis, the Hall effect, photoelectroscopy, spectral photoconductivity and losses of collection of a charge from an ionizing particle on gamma-detectors fabricated of the crystals. Herein the doped composition of the crystals has been determined, the concentrations of the shallow and deep acceptors and donors have been measured separately, the life-times of the electrons and holes have been measured, the energetic position and the concentration of the carrier capture levels have been determined. The crystals grown possess all the characteristic features of rather pure crystals. The results of the mass-spectral analysis have shown that in the cadmium telluride crystals the impurities are present within 10 14 to 10 17 cm -3 . Therefore, a deep ''self-refining'' of the crystal takes place, which proceeds by means of deactivation of the electrically active centers with their associating into electrically inactive complexes. Thus a fact of the deep ''self-refining'' of germanium- and cadmium telluride crystals is stated. It is presumed that such a ''self-refining'' can actually proceed practically in all the crystals

  15. GENDER VIOLENCE IN EDUCATIONAL INSTITUTIONS

    Directory of Open Access Journals (Sweden)

    Rosalva Ruiz-Ramírez

    2016-01-01

    Full Text Available School violence is multifactorial. Social and cultural, family, personal, and institutional aspects, among others, influence educational institutions, in all academic levels. Because this type of violence is increasingly common and has serious consequences, there is a need to prevent and deal with the different types of violence practiced in schools, such as bullying, mobbing, gender violence, and others. Gender violence in institutions is not produced in this scope, in the strict sense, but rather has its origin in social and cultural aspects, rooted in the patriarchal and androcentric culture. Much has been written on the different forms in which violence affects mostly women in the educational system. This essay, without being thorough, attempts to answer three basic questions on gender violence in educational institutions: Why is there gender violence in educational institutions? How is gender violence manifested in schools? And finally, what actions have been taken to mitigate aggressions against women?

  16. Experimental Spaces and Institutional Innovation

    DEFF Research Database (Denmark)

    Cartel, Melodie; Boxenbaum, Eva

    and procedures that connect the prototype to the organizational field, hence increasing the likelihood of institutional innovation. We develop a process model of institutional institutionalization that, through temporal interactions between distancing work and anchoring work, enables the generation......This paper examines processes involved in designing experimental spaces for institutional innovation. Through a qualitative, process-oriented analysis of an experimental space related to the institutional innovation of carbon markets in Europe, we show how key actors in the European electricity...... sector deliberately designed an experimental space and engaged a range of stakeholders in experimenting incognito with a carbon market model. A mirror image of their prototype later appeared as European policy. Our findings show that the key actors engaged in two forms of institutional work, distancing...

  17. Sympathetic cooling and crystallization of ions in a linear Paul trap

    International Nuclear Information System (INIS)

    Drewsen, M.; Bowe, P.; Hornekaer, L.; Brodersen, C.; Schiffer, J.P.; Hangst, J.S.; Schiffer, J.P.

    1999-01-01

    Coulomb crystals, containing up to a few hundred ions of which more than 50% were cooled sympathetically by the Coulomb interaction with laser cooled Mg + ions, have been produced in a linear Paul trap. By controlling the balance of the radiation pressure from the two cooling lasers, the Coulomb crystals could be segregated according to ion species. Previous studies of ion crystals and molecular dynamics simulations suggest that the temperature may be around 10 mK or lower. The obtained results indicate that a wide range of atomic and molecular ions, which due to their internal structures are not amenable to direct laser cooling, can be effectively cooled and localized (crystallized) in linear Paul traps. For high resolution spectroscopy of such ions this may turn out to be very useful. copyright 1999 American Institute of Physics

  18. Homogeneous crystal nucleation in polymers.

    Science.gov (United States)

    Schick, C; Androsch, R; Schmelzer, J W P

    2017-11-15

    The pathway of crystal nucleation significantly influences the structure and properties of semi-crystalline polymers. Crystal nucleation is normally heterogeneous at low supercooling, and homogeneous at high supercooling, of the polymer melt. Homogeneous nucleation in bulk polymers has been, so far, hardly accessible experimentally, and was even doubted to occur at all. This topical review summarizes experimental findings on homogeneous crystal nucleation in polymers. Recently developed fast scanning calorimetry, with cooling and heating rates up to 10 6 K s -1 , allows for detailed investigations of nucleation near and even below the glass transition temperature, including analysis of nuclei stability. As for other materials, the maximum homogeneous nucleation rate for polymers is located close to the glass transition temperature. In the experiments discussed here, it is shown that polymer nucleation is homogeneous at such temperatures. Homogeneous nucleation in polymers is discussed in the framework of the classical nucleation theory. The majority of our observations are consistent with the theory. The discrepancies may guide further research, particularly experiments to progress theoretical development. Progress in the understanding of homogeneous nucleation is much needed, since most of the modelling approaches dealing with polymer crystallization exclusively consider homogeneous nucleation. This is also the basis for advancing theoretical approaches to the much more complex phenomena governing heterogeneous nucleation.

  19. Photonic-crystal waveguide biosensor

    DEFF Research Database (Denmark)

    Skivesen, Nina; Têtu, Amélie; Kristensen, Martin

    2007-01-01

    A photonic-crystal waveguide sensor is presented for biosensing. The sensor is applied for refractive index measurements and detection of protein-concentrations. Concentrations around 10 μg/ml (0.15μMolar) are measured with excellent signal to noise ratio, and a broad, dynamic refractive index se...

  20. Neutron Transmission through Sapphire Crystals

    DEFF Research Database (Denmark)

    of simulations, in order to reproduce the transmission of cold neutrons through sapphire crystals. Those simulations were part of the effort of validating and improving the newly developed interface between the Monte-Carlo neutron transport code MCNP and the Monte Carlo ray-tracing code McStas....