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Viktor Hamburger, Embryologist  

NSDL National Science Digital Library

An online encyclopedia entry about the embryologist, Viktor Hamburger, including a photo and links to other articles about his associates and work. A photo of him in 1933 is linked to this submission.

Adam R Navis (Arizona State University Center for Biology and Society)



FPGA DCT (Discrete Cosine Transform) , , Ronald Scrofano, Viktor K. Prasanna  

E-print Network

FPGA DCT (Discrete Cosine Transform) , , Ronald Scrofano, Viktor K. Prasanna : (DCT) , JPEG MPEG . , DCT . PE DCT . . , , (trade-off) , Xilinx IP . Abstract: The 2-D discrete cosine transform (DCT) is an integral part of video and image processing

Jang, Ju-Wook


European Influences on the Theory and Philosophy of Viktor Lowenfeld.  

ERIC Educational Resources Information Center

Discusses how the work of art theorists, art educators, psychologists, and anthropologists who were predecessors or contemporaries of Viktor Lowenfeld influenced Lowenfeld's philosophy and theory of art education. Included are Friedrich Froebel, James Sully, Franz Cizek, Siegfried Levinstein, Max Verworn, Walter Krotzsch, George Luquet, and Karl

Michael, John A.; Morris, Jerry W.



A view from the top: Russia's minister Viktor N. Mikhailov  

SciTech Connect

Minister Viktor N. Mikhailov has logged thousands of miles in his Moscow-Washington, DC orbit since he was appointed head of the Ministry for Atomic Energy (Minatom) of the Russian Federation two years ago. First, Commerce's uranium dumping case. Next, the suspension agreements. And, today, the landmark HEU deal between America and Russia in which he and his ministry are leading the Russian negotiating team. The view from Minatom is very revealing. It's giving us a fuller picture of Russia's fissile inventories. What the Minister confirmed during the course of his interview with the NUKEM Market Report on September 9, 1993 was fairly remarkable-that the 500 metric tons of warhead HEU up for sale represent from 30 to 40 per cent of Russia's entire HEU stockpile. That is upwards of 1,250 metric tons. Until recently, the best estimates for Russia's HEU supply were still in the 500-600 metric-ton range. Mikhailov, a gifted scientist and scholar turned government leader, puts his stamp on the ministry he runs.

Martin, E.




E-print Network

NON-POSITIVE CURVATURE AND THE PTOLEMY INEQUALITY THOMAS FOERTSCH, ALEXANDER LYTCHAK, VIKTOR are not uniquely geodesic. On the other hand, we show that locally compact, geodesic Ptolemy metric spaces and Ptolemy. 1. Introduction A metric space X is called a Ptolemy metric space, if the inequality (1) |xy

Lytchak, Alexander


Viktor Krivulin and Aleksandr Mironov: The Quest for Sacred Language in 1970s Russian Poetry  

Microsoft Academic Search

This article looks at the prevalence of religious, specifically Christian, imagery in the poetry of two prominent members of the cultural underground in 1970s Leningrad, Viktor Krivulin and Aleksandr Mironov. Taking into account the two poets' concern for the renewal of poetic language and their fascination with the modernist aesthetic, I find in their practice of art as a quasi-religious

Josephine von Zitzewitz



Hard superconducting nitrides Xiao-Jia Chen*, Viktor V. Struzhkin*, Zhigang Wu*, Maddury Somayazulu  

E-print Network

Hard superconducting nitrides Xiao-Jia Chen*, Viktor V. Struzhkin*, Zhigang Wu*, Maddury Somayazulu, and hardness of selected superconducting transition-metal nitrides reveals inter- esting correlations among their physical properties. Both the bulk modulus and Vickers hardness are found to decrease with increas- ing

Wu, Zhigang


Introduction to Object-Oriented Concepts using Fortran90 Viktor K. Decyk  

E-print Network

Introduction to Object-Oriented Concepts using Fortran90 Viktor K. Decyk Department of Physics-8099 email: Abstract Fortran90 is a modern, powerful language with features, and dynamic dispatching, and how to implement them in Fortran90. As a result, a methodology can be developed

Varela, Carlos


Russia`s atomic tsar: Viktor N. Mikhailov  

SciTech Connect

Minatom (Ministry of Atomic Energy) was created to manage Russia`s nuclear weapons program in the age of disarmament. The ministry is responsible for the development, production, and maintenance of nuclear weapons, warhead dismantlement, the production of nuclear materials for weapons, the disposition of nuclear materials disassembled from warheads, the administration of Russia`s vast nuclear weapons complex, the development of policy for the future role of Russia`s nuclear complex and payment of employees entrusted with such tasks. Thus, Minatom is instrumental in the implementation of arms control, disarmament and nonproliferation agreements. The director of Minatom, Viktor N. Mikhailov, wields a great deal of power and influence over Russia`s nuclear infrastructure. He is an important player amidst efforts to reduce the threats posed by Russia`s decaying nuclear complex. There are certainly other personalities in the Russian government who influence Minatom; however, few affect the ministry as profoundly as Mikhailov. His ability to influence Russia`s nuclear complex has been clearly demonstrated by his policies in relation to the US purchase of Russian highly enriched uranium, the planned fissile material storage facility at Mayak, materials protection, control and accountability programs, and his unwavering determination to sell Iran commercial nuclear technology. Mikhailov has also been a key negotiator when dealing with the US on issues of transparency of weapons dismantlement and fissile material disposition, as well as the use of US threat reduction funds. His policies and concerns in these areas will affect the prospects for the successful negotiation and implementation of future nuclear threat reduction programs and agreements with Russia.

Reams, C.A. [Los Alamos National Lab., NM (United States). Center for International Security Affairs



A SRAM-based Architecture for Trie-based IP Lookup Using FPGA Hoang Le, Weirong Jiang, Viktor K. Prasanna  

E-print Network

A SRAM-based Architecture for Trie-based IP Lookup Using FPGA Hoang Le, Weirong Jiang, Viktor K, Reconfigurable Hardware, Field Programm- able Gate Array (FPGA). 1. Introduction With the rapid growth of the Internet, design of high speed IP routers has been a major area of research. Advances in optical networking

Hwang, Kai


Scalable High Throughput and Power Efficient IP-Lookup on FPGA Hoang Le and Viktor K. Prasanna  

E-print Network

Scalable High Throughput and Power Efficient IP-Lookup on FPGA Hoang Le and Viktor K. Prasanna-power SRAM- based linear pipeline architecture for IP lookup. Using a single FPGA, the proposed architecture a major area of research. Ad- vances in optical networking technology are pushing link rates in high speed

Prasanna, Viktor K.


An FPGA-Based Floating-Point Jacobi Iterative Solver Gerald R. Morris and Viktor K. Prasanna  

E-print Network

An FPGA-Based Floating-Point Jacobi Iterative Solver Gerald R. Morris and Viktor K. Prasanna program- mable gate arrays (FPGA) are no longer restricted to their traditional role as substitutes new architectures allow end-users to, in effect, create reconfigurable coprocessors targeting

Prasanna, Viktor K.


Franz-Viktor Kuhlmann 210 McLean Hall, Tel. 6111 INTS 398.3 (02): Cryptography, T2, 2005-06  

E-print Network

Franz-Viktor Kuhlmann 210 McLean Hall, Tel. 6111 INTS 398.3 (02): Cryptography, T2, 2005-06 COURSE OUTLINE This course will consist of an introduction to the mathematical foundations of cryptography. We Press, 1996. ISBN: 0-8493-8523-7 J. A. Buchmann: Introduction to Cryptography. Undergraduate Texts

Kuhlmann, Franz-Viktor


A pact with the embryo: Viktor Hamburger, holistic and mechanistic philosophy in the development of neuroembryology, 1927-1955.  


Viktor Hamburger was a developmental biologist interested in the ontogenesis of hte vertebrate nervous system. A student of Hans Spemann at Freiburg in the 1920s, Hamburger picked up a holistic view of the embryo that precluded him from treating it in a reductionist way; at the same time, he was committed to a materialist and analytical approach that eschewed any form of vitalism or metaphysics. This paper explores how Hamburger walked this thin line between mechanistic reductionism and metaphysical vitalism in light of his work on the factors influencing growth of neurons into limb buds, and the discovery of nerve growth factor, work carried out with Rita Levi-Montalcini and Stanley Cohen. PMID:15685742

Allen, Garland E



An Adaptive Cryptographic Engine for IPSec Architectures Andreas Dandalis and Viktor K. Prasanna  

E-print Network

of cryptographic algorithms. In addition, IPSec architectures have to be flexible enough to adapt to diverse.g., cryptographic algorithms, crypto- graphic operation mode, key). In this paper we focus on the encryption component. FPGA configurations of cryptographic algorithms are stored in the memory in the form

Prasanna, Viktor K.


Synchrotron Moessbauer Spectroscopy and Resistivity Studies of Iron Oxide Under High Viktor V. Struzhkin1  

E-print Network

role in the formation of a variety of electronic and magnetic properties of the transition metal oxides, electronic, optical, and magnetic properties of transition metal oxides. With the development of the high and Kondo systems. A variety of different electronic, magnetic, transport and optical properties

Lin, Jung-Fu "Afu"


Soviet conspiracy theories and political culture in Ukraine: Understanding Viktor Yanukovych and the Party of Regions  

Microsoft Academic Search

Conspiracy theories in Ukraine draw on inherited Soviet political culture and political technology imported from Russia where such ideas had gained ascendancy under President Vladimir Putin. Eastern Ukrainian and Russian elites believed that the US was behind the 2000 Serbian Bulldozer, 2003 Georgian Rose and 2004 Orange democratic revolutions. The Kuchmagate crisis, impending succession crisis, 2004 presidential elections and Orange

Taras Kuzio



ModelML: a Markup Language for Automatic Model Synthesis Cong Zhang Amol Bakshi Viktor K. Prasanna  

E-print Network

are developed based on an exhaustive characterization of the underlying domain, and are used by the designer- driven reservoir management. In model driven reservoir management, the reservoir engineer relies on simulations (and hence simulation models) to make key operational de- cisions pertaining to the reservoir

Hwang, Kai


Scalable and Modular Algorithms for Floating-Point Matrix Multiplication on Ling Zhuo and Viktor K. Prasanna  

E-print Network

. The processing elements(PEs) used in our algo- rithms are modular so that floating-point units can be easilyScalable and Modular Algorithms for Floating-Point Matrix Multiplication on FPGAs £ Ling Zhuo, we propose two FPGA-based algorithms for floating-point matrix multiplication, a fundamental kernel

Prasanna, Viktor K.


Analysis of High-performance Floating-point Arithmetic on FPGAs Gokul Govindu, Ling Zhuo, Seonil Choi and Viktor Prasanna  

E-print Network

(for off-chip communication to either processors or memory). Platform FPGAs also include embedded parameters like the paral- lelism, number of compute elements and storage elements, throughput/latency, etc

Prasanna, Viktor K.


Runtime Checking for Separation Logic Huu Hai Nguyen 1 , Viktor Kuncak 2 , and WeiNgan Chin 1,3  

E-print Network

approach for specifying properties of recursive mutable data structures. Several existing systems verify a subclass of separation logic specifications using static analysis techniques. Checking data structure and code by detecting concrete counterexamples to their validity. This paper presents Separation Logic

Chin, Wei Ngan


SmAll That Jazz  

ERIC Educational Resources Information Center

This article describes how Viktor Schreckengost's work had been a learning experience for the students of Grant Elementary School. Viktor's most famous work, "Jazz Bowl," was the focus of the author's curriculum. Viktor created this punch bowl for Eleanor Roosevelt in the 1930s. The bowl was so popular that a series of them were produced. The

Bluemel, Dina



Phonon-mediated superconducting transitions in layered cuprate superconductors Xiao-Jia Chen, Viktor V. Struzhkin, Zhigang Wu, Russell J. Hemley, and Ho-kwang Mao  

E-print Network

transition temperature Tc and oxygen isotope exponent on the doping level, number of CuO2 layers, pressurePhonon-mediated superconducting transitions in layered cuprate superconductors Xiao-Jia Chen for the superconducting transitions in other homologous series such as the bismuth- and thallium-based family. Our results

Wu, Zhigang


Franz-Viktor Kuhlmann 210 McLean Hall, Tel. 6111 Introduction to Calculus _ Math 110.3 (04) T2, 1998-99  

E-print Network

) If g is the inverse function of f(x) = 3 + 2x + lnx, find g0(5). 2) A bacteria culture starts with 1000 bacteria and the population triples every 20 minutes. (i) Find an expression for the number of bacteria after t minutes. (ii) Find the number of bacteria after 1 hour. (iii) When will the population

Kuhlmann, Franz-Viktor


FranzViktor Kuhlmann 210 McLean Hall, Tel. 6111 Introduction to Calculus ---Math 110.3 (09) T1, 199899  

E-print Network

(x) = 3x + ln x, find g 0 (3). 2) a) A bacteria culture starts with 2000 bacteria and the population triples every half­hour. (i) Find an expression for the number of bacteria after t minutes. (ii) Find the number of bacteria after 20 minutes. (iii) When will the population reach 10,000? b) After ten hours

Kuhlmann, Franz-Viktor


FranzViktor Kuhlmann 210 McLean Hall, Tel. 6111 Introduction to Calculus ---Math 110.3 (04) T2, 199899  

E-print Network

) If g is the inverse function of f(x) = 3 + 2x + ln x, find g 0 (5). 2) A bacteria culture starts with 1000 bacteria and the population triples every 20 minutes. (i) Find an expression for the number of bacteria after t minutes. (ii) Find the number of bacteria after 1 hour. (iii) When will the population

Kuhlmann, Franz-Viktor


Franz-Viktor Kuhlmann 210 McLean Hall, Tel. 6111 Introduction to Calculus _ Math 110.3 (09) T1, 1998-99  

E-print Network

culture starts with 2000 bacteria and the population triples every half-hour. (i) Find an expression(x) = log3(x3 - 8) . d) If g is the inverse function of f(x) = 3x + lnx, find g0(3). 2) a) A bacteria for the number of bacteria after t minutes. (ii) Find the number of bacteria after 20 minutes. (iii) When

Kuhlmann, Franz-Viktor


Shirakatsi Crater on the Moon  

NASA Astrophysics Data System (ADS)

One of the Moon's craters is named after Anania Shirakatsi. It was named due to Viktor Ambartsumian's application to the International Astronomical Union. The crater has 51km diameter and is coupled with the neighboring crater Dobrovolski.

Harutyunyan, G. S.



The Marine Biological Laboratory Embryology Course  

NSDL National Science Digital Library

An article about the history of the Woods Hole MBL Embryology Course, including a link to the PDF of the historic lab notes by the embryologist, Viktor Hamburger when he was an instructor at Woods Hole in 1942.

Jane Maienschein (Arizona State University Center for Biology and Society)



CNN Newsroom Classroom Guides. September 1998.  

ERIC Educational Resources Information Center

These classroom guides, designed to accompany the daily CNN (Cable News Network) Newsroom broadcasts for the month of September, provide program rundowns, suggestions for class activities and discussion, student handouts, and a list of related news terms. Topics include: the reaction of world markets to Russia's Duma rejection of Viktor

Turner Educational Services, Inc., Atlanta, GA.


High-Throughput IP-Lookup Supporting Dynamic Routing Tables using FPGA  

E-print Network

High-Throughput IP-Lookup Supporting Dynamic Routing Tables using FPGA Hoang Le and Viktor K 90089, USA Email: {hoangle, prasanna} Abstract--Advances in optical networking technology Programmable Gate Arrays (FPGA) along with external SRAM, the proposed architecture can support over 2M

Prasanna, Viktor K.


Oscillatory concentration pulses of some divalent metal ions induced by a redox oscillator  

E-print Network

by a pH oscillator backward and forward, we now couple a redox core oscillating reaction to two reactions between the input reagents of the core oscillator and the target non- redox ion. This modifiedOscillatory concentration pulses of some divalent metal ions induced by a redox oscillator Viktor

Epstein, Irving R.


Semantic Web Technologies for Event Modeling and Analysis: A Well Surveillance Use Case  

E-print Network

SPE-128708 Semantic Web Technologies for Event Modeling and Analysis: A Well Surveillance Use Case Tao Zhu, Univ. of Southern California; Amol Bakshi, SPE, Chevron; Viktor K. Prasanna, SPE, Univ. of Southern California; Roger Cutler, Chevron; Scott Fanty, Chevron Copyright 2010, Society of Petroleum

Prasanna, Viktor K.

34 Vol. 23 No. 26 July 12 2013  

E-print Network

of shape memory polymers is demonstrated for deformable, pro- grammable, and shape-memorizing micro and the formation of crosslinked shape memory polymer networks can be achieved in a single step via compression Yu, Shuodao Wang, Viktor Malyarchuk, Tao Xie,* and John A. Rogers* 1. Introduction Shape memory

Rogers, John A.


The Language of Ideology: Lingual Manipulation of Readers in German Literature of the Third Reich  

Microsoft Academic Search

In recognizing more than just hyperbole in their critical studies of National Socialist language, post- war philologists Viktor Klemperer (1946) and Eugen Seidel (1961) credit persuasive words and syntax with the expansion of Hitler's ideology among the German people. This popular explanation is being revisited by contemporary philologists, however, as new historical argument holds the functioning of the Third Reich


A Tragic Optimism: The Existential Vacuum and God in the Poetic Vision  

Microsoft Academic Search

In Man's Search for Meaning psychiatrist Viktor Frankl diagnoses the malaise of humankind as an ?existential vacuum,? a sense of meaninglessness. He suggests that help for this malaise may be found in creativity, love, and the freedom of moral choice. Whether acknowledged or not, these human gifts are reflections of God, of a higher way--or what Frankl calls ?another dimension,

Barbara A. Heavilin; Charles W. Heavilin


Lowenfeld at Hampton (1939-1946): Empowerment, Resistance, Activism, and Pedagogy  

ERIC Educational Resources Information Center

Viktor Lowenfeld (1903-1960) has been abundantly documented as having influenced art teaching in the United States. Scarce attention, however, has been given to the significant and remarkable advancements he made to resist structures of institutionalized racism and promote inter-racial cooperation. Lowenfeld was a mentor to several notable African

Holt, Ann



Lowenfeld Teaching Art: A European Theory and American Experience at Hampton Institute.  

ERIC Educational Resources Information Center

Describes European Viktor Lowenfeld's version of the visual-haptic theory. Recounts how Lowenfeld modified the theory while serving as a studio art teacher in a black U.S. college from 1939 to 1946. Compares Lowenfeld's European and U.S. transformations of the theory. (BSR)

Smith, Peter



For More Information:  

E-print Network

Cohen and Viktor Hamburger discovered the first neuronal trophic factor: nerve growth factor. Today for Neurological Disorders · The Alzheimer's Disease Research Center · The Neurofibromatosis Center for Medical Research in Alzheimer's Disease (3) · Pew Scholar in Biomedical Sciences · Potamkin Prize

Stormo, Gary


Nature Macmillan Publishers Ltd 1997 Superconductivity at 1017K  

E-print Network

Nature © Macmillan Publishers Ltd 1997 Superconductivity at 10­17K in compressed sulphur Viktor V lower pressures) in the heavier superconducting chalcogenides Se and Te. Moreover, at the transformation-pressure measurements of superconductivity in Se and Te show evidence for maximum critical temperatures of 5.6 and 7.4 K

Hemley, Russell J.


Experimental and modeling studies of imaging with curvilinear electronic eye cameras  

E-print Network

Experimental and modeling studies of imaging with curvilinear electronic eye cameras Viktor of the imaging properties of planar, hemispherical, and elliptic parabolic electronic eye cameras are compared.-J. Yu, J. B. Geddes 3rd, J. Xiao, S. Wang, Y. Huang, and J. A. Rogers, "A hemispherical electronic eye

Rogers, John A.


Children's Artistic Development and the Influence of Visual Culture  

E-print Network

...............................................................................................................5 Viktor Lowenfeld .........................................................................................6 Jean Piaget ...................................................................................................7 Lev Vygotsky... are not involved in art beyond this stage when asked to draw, their adult artwork will exhibit the typical characteristics of a twelve year old (Lowenfeld & Brittian, 1982). Jean Piaget. Like Lowenfeld, Jean Piaget noted detailed stage characteristics...

Grandstaff, Lindsey Jean



Secure extensions of FPGA soft core processors for symmetric key cryptography  

E-print Network

Secure extensions of FPGA soft core processors for symmetric key cryptography Lubos GASPAR, Viktor by a cryptographic accelerator ­ crypto-coprocessor. Secret keys are usually stored in the internal registers and the cryptographic extension is accessed as an ordinary peripheral ­ a coprocessor. Although the interfacing

Paris-Sud XI, Université de


VOLUME 83, NUMBER 10 P H Y S I C A L R E V I E W L E T T E R S 6 SEPTEMBER 1999 Raman Spectroscopy of Dense H2O and the Transition to Symmetric Hydrogen Bonds  

E-print Network

of Dense H2O and the Transition to Symmetric Hydrogen Bonds Alexander F. Goncharov, Viktor V. Struzhkin,* Ho-kwang Mao, and Russell J. Hemley Geophysical Laboratory and Center for High Pressure Research changes associated with the transition to the nonmolecular, symmetric hydrogen-bonded state. At 60 GPa

Hemley, Russell J.


Contemporary approaches to aviation safety show a dynamic endeavour to identify a variety of components that minimize the  

E-print Network

, Alex de Voogt; GAP: assessment of performance in teams ­ a new attempt to increase validity, Viktor to improve coping skills for aircrew and air traffic controllers, and organisational approaches to error objective performance measures, Matt Ebbatson, Don Harris, John Huddlestone and Rodney Sears; Civil pilots


Electronic spin state of iron in lower mantle perovskite  

E-print Network

-bearing samples exhibit a mixed spin state. The residual magnetic moment in the aluminum-bearing perovskite on the magnetic, thermoelastic, and transport properties of the lower mantle, and on the distribution of ironElectronic spin state of iron in lower mantle perovskite Jie Li* , Viktor V. Struzhkin*, Ho

Shen, Guoyin


Development and Evaluation of LAV: an SMT-Based Error Finding Platform  

E-print Network

Vujosevi´c-Janici´c1 and Viktor Kuncak2 1 Faculty of Mathematics, Studentski trg 16, 11000 Belgrade, Serbia for compilation and analysis. LAV uses symbolic execution to construct a first-order logic formula that mod- els the behavior of each basic blocks. It models the relationships between basic blocks using propositional

Kuncak, Viktor



Microsoft Academic Search

Acknowledgments My first feeling of gratitude is for my advisor, Prof. Viktor K. Prasanna, whose guid- ance over the past several years further enriched this life-changing experience. What I have learned from him will guide my actions throughout my research career. This work would not have been possible without him. I would also like to express my gratitude to my

Animesh Pathak



Cosmic balloons  

NASA Astrophysics Data System (ADS)

A team of French high-school students sent a weather balloon into the upper atmosphere to recreate Viktor Hesss historical experiment that demonstrated the existence of ionizing radiation from the skylater called cosmic radiation. This discovery earned him the Nobel Prize for Physics in 1936.

El Abed, Mohamed



Lyon, le 28 novembre 2014 Communiqu de presse  

E-print Network

le virus d'Ebola L'équipe "Bases moléculaires de la pathogénicité virale", animée par Viktor Volchkov'échelle moléculaire pour comprendre l'origine de la dangerosité du virus Ebola. Elle a publié le 20 novembre dans la revue PLOS Pathogens un article éclairant de quelle manière une protéine du virus Ebola provoque une

van Tiggelen, Bart


Soviet Gothic-fantastic: a study of Gothic and supernatural themes in early Soviet literature  

E-print Network

-fantastic stories by Orest Somov, Aleksandr Pushkin, A.K. Tolstoi, and others.#2; Ironic Gothic refers to postmodern reprises of the genre by novelists such as Boris Akunin and Viktor Pelevin.#2; The third category includes self-conscious transposition of Gothic... of excess fascination with transgression and the anxiety over cultural limits and boundaries.#2; The stock features of Gothic fiction include tortuous, fragmented narratives, highly ornamented prose and emotion-driven aesthetics, mysterious...

Maguire, Muireann



Particle Astrophysics in NASA's Long Duration Balloon Program  

E-print Network

A century after Viktor Hess' discovery of cosmic rays, balloon flights still play a central role in the investigation of cosmic rays over nearly their entire spectrum. We report on the current status of NASA balloon program for particle astrophysics, with particular emphasis on the very successful Antarctic long-duration balloon program, and new developments in the progress toward ultra-long duration balloons.

Gorham, Peter W



The Knorre astronomers' dynasty  

NASA Astrophysics Data System (ADS)

We attempt to throw light upon the poorly known astronomical dynasty of Knorre and describe its contribution to astronomy. The founder of the dynasty, Ernst Christoph Friedrich Knorre (1759-1810), was born in Germany in 1759, and since 1802 he was a Professor of Mathematics at the Tartu University, and observer at its temporary observatory. He determined the first coordinates of Tartu by stellar observations. Karl Friedrich Knorre (1801-1883) was the first director of the Naval Observatory in Nikolaev since the age of 20, provided the Black Sea navy with accurate time and charts, trained mariners in astronomical navigation, and certified navigation equipment. He compiled star maps and catalogues, and determined positions of comets and planets. He also participated in Bessel's project of the Academic Star Charts, and was responsible for Hora 4, published by the Berlin Academy of Sciences. This sheet permitted to discover two minor planets, Astraea and Flora. Viktor Knorre (1840-1919) was born in Nikolaev. In 1862 he left for Berlin to study astronomy. After defending his thesis for a doctor's degree, he went to Pulkovo as an astronomical calculator in 1867. Since 1873 Viktor worked as an observer of the Berlin Observatory Fraunhofer refractor. His main research focussed on minor planets, comets and binary stars. He discovered the minor planets Koronis, Oenone, Hypatia and Penthesilea. Viktor Knorre also worked on improving astronomical instrumentation, e.g. the Knorre / Heele equatorial telescope mounting.

Pinigin, G.



Identification of Close Relatives in the HUGO Pan-Asian SNP Database  

E-print Network

samples collected from 71 Asian populations. For studies of human population genetics such as genetic in the HUGO Pan-Asian SNP Database. PLoS ONE 6(12): e29502. doi:10.1371/journal.pone.0029502 Editor: ToomasIdentification of Close Relatives in the HUGO Pan-Asian SNP Database Xiong Yang, Shuhua Xu

Xu, Shuhua


THE JOURNAL OF CHEMICAL PHYSICS 134, 054507 (2011) Interaction potential and infrared absorption of endohedral H2 in C60  

E-print Network

. The vibrational frequency and the rotational constant of endohedral H2 are smaller than those of H2 in the gas of the C60 cavity is close to spherical. The local envi- ronment of H2 has a negligible inhomogeneous for spectroscopic and theoretical investi- a)Electronic mail: gations of interactions between

Turro, Nicholas J.


News and Views: A total solar eclipse over Rapa Nui; ESA's vision; International team wins first Ambartsumian Prize; Thinner thermosphere; ESA funds games; Team finds starspots  

NASA Astrophysics Data System (ADS)

Francisco Diego recorded spectacular images of the 11 July 2010 total solar eclipse from Rapa Nui (Easter Island), making the most of modern digital technology - much of which originated from astronomical research - in taking and processing the images. The European Space Agency has set out its priorities for the decade starting in 2015, in a report entitled Cosmic Vision. The first Viktor Ambartsumian International Prize, in memory of the distinguished Armenian theorist, goes to the team led by Prof. Michel Mayor of the Observatory of Geneva, for ``their important contribution in the study of relation between planetary systems and their host stars''.



Neuroscience in Nazi Europe Part III: victims of the Third Reich.  


In Part I, neuroscience collaborators with the Nazis were discussed, and in Part II, neuroscience resistors were discussed. In Part III, we discuss the tragedy regarding european neuroscientists who became victims of the Nazi onslaught on non-Aryan doctors. Some of these unfortunate neuroscientists survived Nazi concentration camps, but most were murdered. We discuss the circumstances and environment which stripped these neuroscientists of their profession, then of their personal rights and freedom, and then of their lives. We include a background analysis of anti-Semitism and Nazism in their various countries, then discuss in depth seven exemplary neuroscientist Holocaust victims; including Germans Ludwig Pick, Arthur Simons, and Raphael Weichbrodt, Austrians Alexander Spitzer and Viktor Frankl, and Poles Lucja Frey and Wladyslaw Sterling. by recognizing and remembering these victims of neuroscience, we pay homage and do not allow humanity to forget, lest this dark period in history ever repeat itself. PMID:23230611

Zeidman, Lawrence A; Kondziella, Daniel



Armenian Astronomical Heritage  

NASA Astrophysics Data System (ADS)

A review is given on the Armenian Astronomical Heritage from ancient times to nowadays. Armenian ancient astronomy includes the division of the skies into constellations, rock art, ancient Armenian calendar, ancient observatories (such as Metsamor and Karahunge), records of astronomical events (such as Halley's Comet recorded on Tigranes the Great's coin), ancient names of celestial bodies (planets, stars, constellations), etc. The Medieval Armenian astronomy includes two more calendars, Anania Shirakatsi's scientific heritage, the record of 1054 Supernova, sky maps by Luca Vanandetsi and Mkhitar Sebastatsi, etc. Modern Armenian astronomical heritage first of all consists of the famous Byurakan Astrophysical Observatory founded in 1946 by Viktor Ambartsumian, as well as Yerevan Astronomical Observatory, Armenian Astronomical Society, Armenian Virtual Observatory, Yerevan State University Department of Astrophysics, Astrofizika journal, and brilliant young students who systematically win high positions at International Astronomical Olympiads.

Mickaelian, A. M.



The Antarctic Impulsive Transient Antenna: A Suborbital Ultra-high Energy Particle Observatory  

NASA Astrophysics Data System (ADS)

We report on recent results, the current status, and future plans for the ANITA long-duration balloon payload. ANITA has completed three Antarctic flights, including the original prototype ANITA-lite, and will fly a third time in late 2013. ANITA has now extended its range of radio-detection capabilities to include geosynchrotron emission from ultra-high energy cosmic rays air showers as well as neutrinos, and has paved the way for potential new suborbital and even space-based instruments to probe the highest energy particles in the universe. A hundred years after Viktor Hess' first balloon flights to measure low-energy cosmic rays, balloon payloads still play a crucial role in cosmic ray measurements, now even at the very highest cosmic ray energies.

Gorham, Peter



Theoretical Modeling for the X-ray Spectroscopy of Iron-bearing MgSiO3 under High Pressure  

NASA Astrophysics Data System (ADS)

The behaviors of iron (Fe) in MgSiO3 perovskite, including valence state, spin state, and chemical environments, at high pressures are of fundamental importance for more detailed understanding the properties of the Earth's lower mantle. The pressure induced spin transition of Fe-bearing MgO and MgSiO3 are detected often by using high-resolution K-edge X-ray emission spectroscopy (XES) [1,2,3] and confirmed by theoretical simulations. [4,5] Since the Fe K-edge XES is associated to the 3p orbital, which is far from the valence orbitals (3d and 4s), it provides no information about its coordination environments. However, the Fe L-edge XES and X-ray absorption spectroscopy (XAS) can directly present the distribution and intensity of Fe-3d character. To identify both the spin states and the coordination environments of iron-bearing MgSiO3, we systematically investigate the L-edge XAS, XES and X-ray photoelectron (XPS) spectroscopy of Fe2+- and Fe3+-bearing MgSiO3 under high pressure by using the first-principles density functional method combined with the slater-transition method. Our results show that Fe2+ and Fe3+ can be distinguished easily by taking the XPS spectra. The spin transition of Fe2+ and Fe3+ can also be clearly certified by XAS and XES. Interestingly, the broadness of L-edge XES of Fe changes depending on the iron position, meaning that its coordination environment might also be distinguishable by using high-resolution XES measurements. Research supported by the Ehime University G-COE program and KAKENHI. [1] James Badro, Guillaume Fiquet, Franois Guyot, Jean-Pascal Rueff, Viktor V. Struzhkin, Gyrgy Vank, and Giulio Monaco. Science 300, 789 (2003), [2] James Badro, Jean-Pascal Rueff, Gyrgy Vank, Giulio Monaco, Guillaume Fiquet, and Franois Guyot, Science 305, 383 (2004), [3] Jung-Fu Lin, Viktor V. Struzhkin, Steven D. Jacobsen, Michael Y. Hu, Paul Chow, Jennifer Kung, Haozhe Liu, Ho-kwang Mao, and Gussell J. Hemley, Nature 436, 377 (2005). [4] Taku Tsuchiya, Renata M. Wentzcovitch, Cesar R.S. da Silva, and Stefano de Gironcoli, Phys. Rev. Lett. 96, 198501 (2006). [4] Han Hsu, Peter Blaha, Matteo Cococcioni, and Renata M. Wentzcovitch, Phys. Rev. Lett. 106, 118501 (2011).

Wang, X.; Tsuchiya, T.



"Making strange": a role for the humanities in medical education.  


Stories, film, drama, and art have been used in medical education to enhance empathy, perspective-taking, and openness to "otherness," and to stimulate reflection on self, others, and the world. Yet another, equally important function of the humanities and arts in the education of physicians is that of "making strange"-that is, portraying daily events, habits, practices, and people through literature and the arts in a way that disturbs and disrupts one's assumptions, perspectives, and ways of acting so that one sees the self, others, and the world anew. Tracing the development of this concept from Viktor Shklovsky's "enstrangement" (ostranenie) through Bertolt Brecht's "alienation effect," this essay describes the use of this technique to disrupt the "automaticity of thinking" in order to discover new ways of perceiving and being in the world.Enstrangement may be used in medical education in order to stimulate critical reflection and dialogue on assumptions, biases, and taken-for-granted societal conditions that may hinder the realization of a truly humanistic clinical practice. In addition to its ability to enhance one's critical understanding of medicine, the technique of "making strange" does something else: By disrupting fixed beliefs, this approach may allow a reexamination of patient-physician relationships in terms of human interactions and provide health care professionals an opportunity-an "open space"-to bear witness and engage with other individuals during challenging times. PMID:24751976

Kumagai, Arno K; Wear, Delese



Posters of the Russian Civil War, 1918-1922  

NSDL National Science Digital Library

This rather unique collection of posters from the Russian Civil War comes from Harold Manchester Fleming, who happened to be a field inspector for the American Relief Administration after World War I. Fleming acquired over 100 posters from the period, and they made their way to the New York Public Library's Manuscripts and Archives Division in the 1970s. Later, the collection grew with items donated by Paul S. Hall and Dorothy F. Hall and Alex Rabinovich from the same period. On this site, visitors can browse through posters by internationally known graphic artists such as Dmitrii Moor, Vladimir Maiakovskii, and Viktor Deni. All of the works here represent dramatic departures from the previous established design and artistic traditions in Russia at the time, and they address topics like industrialization, collectives, and urban life. All told, there are over 210 items here, and visitors can create their own scrapbook of images for future reference and also look over detailed records for each visual item.


Freedom and mystery: an intellectual history of Jaspers' General Psychopathology.  


The Kantian idea of freedom was introduced to psychiatry methodologically by Karl Jaspers. It influenced the genesis and design of his doctrine of understanding, General Psychopathology, even more decisively than Nietzsche's topos of resentment did. This article places Jaspers' work in the framework of a history of ideas. It begins by pursuing Nietzsche's perspective in the context of Darwinism, then focuses on the role concealed resentment played for Jaspers' genealogical concept of understanding in the first (1913) edition of General Psychopathology, which is primarily oriented towards Max Weber, before examining the idea of Kantian freedom, which was to become crucial for Jaspers' later work. The antinomy of freedom already shapes the suicidology contained in Jaspers' Philosophy of 1931. The idea gains prominence in the final, philosophically grounded revision of GeneralPsychopathology published in 1941/1942. Jaspers' reception of Kantian idealism leads him to develop a concept of critical understanding that clearly distinguishes itself from speculative understanding, whose hazards Jaspers illustrates on the basis of Viktor von Weizscker's theory of medicine. This goes far beyond Kant, embracing Schelling and Hegel philosophically. As it were, Jaspers and von Weizscker represent critical and postcritical thought in psychopathology and psychosomatics. The epilogue sums up by placing the inquiry in the context of Jaspers' life and work. PMID:23942461

Bormuth, Matthias



A scramble for data on Arctic radioactive dumping  

SciTech Connect

On 15 August, a Russian research vessel, the Viktor Buynitskiy, will leave the Norwegian port of Kirkenes packed with surveying equipment and scientists. Its mission will be to check out one of the more alarming environmental stories that have drifted out of the former Soviet Union since its collapse last fall: a claim that the Arctic is being polluted by tons of radioactive waste spilled or dumped by the Soviet military. Since May, US officials have been searching for information to confirm or disprove the reports about Russian radiation. The basic concern, is as follows: Arctic waters - and, potentially, fisheries near Norway and Alaska - are in danger of being contaminated by radioactive isotopes leaking from two major sources. One is the area around Novaya Zemlya, an archipelago where the Soviets conducted bomb tests, scuttled submarines, and disposed of waste canisters. The other is freshwater runoff into the Arctic Ocean - including the Ob and Yenisey Rivers - carrying isotopes from weapons plants, waste ponds, and accident sites in Siberia.

Marshall, E.



Political and Economic Crisis in Russia  

NSDL National Science Digital Library

This week's In the News examines the tumultuous state of affairs in Russia. The ten resources discussed offer background, news, analysis, and commentary. In recent weeks, political turmoil and economic chaos have severely threatened Russia's stability as an emerging free-market democracy, prompting regional governor and former general Alexander Lebed to say that "the situation in Russia is catastrophic--worse than in 1917." Russia's latest political upheaval began on August 23 when the unpredictable President Boris Yeltsin discharged his prime minister, Sergei Kiriyenko, and reinstalled the previous prime minister, Viktor Chernomyrdin (see the April 7, 1998 Scout Report for Social Sciences). Chernomyrdin plans to create an "economic dictatorship" in Russia and to print billions of rubles to avoid total economic collapse. Yesterday, in an approval ballot to reinstate Chernomyrdin as prime minister, the Duma rejected his appointment for the second time in two weeks. Analysts predict that next week a subsequent ballot for approval will fail, the Duma will dissolve, and Yeltsin will rule by decree, without a functioning government, until new parliamentary elections are held. Russian political dissension has been induced by the country's severe financial crisis. On September 6, the Russia economy suffered a blow when the European Union decided not to offer money to Russia and spurned a moratorium on debts Russia owes to EU members. Today in another setback, chairman of the central bank, Sergei Dubinin, tendered his resignation. These events, compounded by ruble devaluation, limited tax revenue, and skittish foreign investments, have left the economy in shambles, despite the recent receipt of an enormous loan from the International Monetary Fund (discussed in the July 16, 1998 Scout Report for Business & Economics).

Osmond, Andrew.



PREFACE: 2nd Russia-Japan-USA Symposium on the Fundamental and Applied Problems of Terahertz Devices and Technologies (RJUS TeraTech - 2013)  

NASA Astrophysics Data System (ADS)

The 2nd Russia-Japan-USA Symposium 'The Fundamental & Applied Problems of Terahertz Devices & Technologies' (RJUS TeraTech - 2013) Bauman Moscow State Technical University Moscow, Russia, 3-6 June, 2013 The 2nd Russia-Japan-USA Symposium 'The Fundamental & Applied Problems of Terahertz Devices & Technologies' (RJUS TeraTech - 2013) was held in Bauman Moscow State Technical University on 3-6 June 2013 and was devoted to modern problems of terahertz optical technologies. RJUS TeraTech 2013 was organized by Bauman Moscow State Technical University in cooperation with Tohoku University (Sendai, Japan) and University of Buffalo (The State University of New York, USA). The Symposium was supported by Bauman Moscow State Technical University (Moscow, Russia) and Russian Foundation for Basic Research (grant number 13-08-06100-g). RJUS TeraTech - 2013 became a foundation for sharing and discussing modern and promising achievements in fundamental and applied problems of terahertz optical technologies, devices based on grapheme and grapheme strictures, condensed matter of different nature. Among participants of RJUS TeraTech - 2013, there were more than 100 researchers and students from different countries. This volume contains proceedings of the 2nd Russia-Japan-USA Symposium 'The Fundamental & Applied Problems of Terahertz Devices & Technologies'. Valeriy Karasik, Viktor Ryzhii and Stanislav Yurchenko Bauman Moscow State Technical University Symposium chair Anatoliy A Aleksandrov, Rector of BMSTU Symposium co-chair Valeriy E Karasik, Head of the Research and Educational Center 'PHOTONICS AND INFRARED TECHNOLOGY' (Russia) Invited Speakers Taiichi Otsuji, Research Institute of Electrical Communication, Tohoku University, Sendai, Japan Akira Satou, Research Institute of Electrical Communication, Tohoku University, Sendai, Japan Michael Shur, Electrical, Computer and System Engineering and Physics, Applied Physics, and Astronomy, Rensselaer Polytechnic Institute, NY, USA Natasha Kirova, University Paris-Sud, France Andrei Sergeev, Department of Electrical Engineering, The University of Buffalo, The State University of New Your, Buffalo, NY, USA Magnus Willander, Linkoping University (LIU), Department of Science and Technology, Linkopings, Sweden Dmitry R Khohlov, Physical Faculty, Lomonosov Moscow State University, Russia Vladimir L Vaks, Institute for Physics of Microstructures of Russian Academy of Sciences, Russia

Karasik, Valeriy; Ryzhii, Viktor; Yurchenko, Stanislav



The Russian Federation's Ministry of Atomic Energy: Programs and Developments  

SciTech Connect

This paper reviews select programs driving the Ministry of Atomic Energy of the Russian Federation's (Minatom) efforts to raise funds, comments on their potential viability, and highlights areas likely to be of particular concern for the US over the next three to five years. The paper's findings are: (1) Despite numerous cabinet displacements throughout the Yeltsin administration, Yevgeny Adamov was reappointed Minister on four occasions. With Boris Yeltsin's January 1, 2000 resignation, Adamov's long-term position as the head of the Ministry is more tenuous, but he will likely retain his position until at least the March 2000 elections. Acting President Vladimir Putin is unlikely to reorganize his cabinet prior to that date and there are no signs that Putin is dissatisfied with Adamov's leadership of Minatom. (2) Adamov's chief priorities are downsizing Minatom's defense sector, increasing the oversight of subsidiary bodies by the central bureaucracy and consolidating commercial elements of the Ministry within an umbrella organization called Atomprom. (3) Viktor Mikhaylov, Adamov's predecessor and critic of his reform efforts, has been relieved of his duties as First Deputy Minister. While he retains his positions as Chief of the Science Councils and Chief Scientist at Arzamas-16, his influence on Minatom's direction is greatly diminished. Adamov will likely continue his efforts to further marginalize Mikhaylov in the coming year. (4) Securing extra-budgetary sources of income continues to be the major factor guiding Minatom's international business dealings. The Ministry will continue to aggressively promote the sale of nuclear technology abroad, often to countries with questionable nonproliferation commitments. (5) Given the financial difficulties in Russia and Minatom's client states, however, few nuclear development programs will come to fruition for a number of years, if ever. Nevertheless, certain peaceful nuclear cooperation agreements should be carefully monitored--particularly those negotiated with Cuba, Iran, Libya and Syria. (6) Waste management has also risen in importance for Minatom. Opportunities for raising funds by reprocessing, storing and permanently disposing of spent fuel from foreign states are being explored. Although currently prohibited by federal law, the Russian Parliament will likely pass legislation in support of this program.

CM Johnson




NASA Astrophysics Data System (ADS)

The JENAM symposium "Physics of Stars" took place on the 5th and 6th July of 2011 in Saint-Petersburg. This symposium had a wide-ranging look at observational and theoretical studies of stars and stellar systems. Several talks were devoted to accurate determination of fundamental stellar parameters, such as star's mass, radius, effective temperature, surface gravity, chemical composition. This is particularly crucial to fully exploit the data from the new generation of large ground-based telescopes and future space missions like the GAIA one. Viktor Orlov reported the measurements of stellar mass for a few multiple systems and also the investigation of their dynamical stability. To improve the determination of parameters of the components in an eclipsing binary system including a Wolf-Rayet star, Eleonora Antokhina and her co-workers updated their synthesis model by accounting for the absorption in the expanding stellar wind. The variable stars are excellent laboratories to study the physical processes either occurring at certain stages of stellar evolution or caused by the interaction of a star with its companion or circumstellar medium. Nikolay Samus reported the discovery of hundreds of new variable stars in their work on digitalization of the Moscow stacks of sky photographs. The exotic star VSX J052807.9+725606, with a very strong asymmetry of maxima, wavelength dependence of amplitude, and the shift of the secondary minimum from the phase 0.5, was discovered by Natalia Virnina. Michael E. Contadakis and his co-workers presented the additional observational evidences for weak transient optical oscillations of the red dwarf AD Leo. Spectral variability of the two massive luminous stars in the M33 galaxy was studied by Olga Maryeva. Alex Dudorov and Sergei Zamozdra and Alexander Grigoriev et al. discussed the theoretical and observational problems of star formation. Galina Dremova presented the numerical algorithm for computing the tidal torque constants for a given close eclipsing binary. Natalia Shakht and her co-workers reported the estimation of the central body mass for several globular clusters with the measured dispersion of stellar radial velocities.

Mashonkina, Lyudmila I.



Novel itinerant transverse spin waves  

NASA Astrophysics Data System (ADS)

In 1956, Lev Davidovich Landau put forth his theory on systems of interacting fermions, or fermi liquids. A year later, Viktor Pavlovich Silin described spin waves that such a system of fermions would support. The treatment of the contribution of the molecular field to the spin wave dispersion was a novel aspect of these spin waves. Silin predicted that there would exist a hierarchy of spin waves in a fermi liquid, one for each component of the spherical harmonic expansion of the fermi surface. In 1968, Anthony J. Leggett and Michael J. Rice derived from fermi liquid theory how the behavior of the spin diffusion coefficient of a fermi liquid could be directly experimentally observable via the spin echo effect [24]. Their prediction, that the diffusion coefficient of a fermi liquid would not decay exponentially with temperature, but rather would have a maximum at some non-zero temperature, was a direct consequence of the fermi liquid molecular field and spin wave phenomena, and this was corroborated by experiment in 1971 by Corruccini, et al. [13]. A parallel advancement in the theory of fermi liquid spin waves came with the extension of the theory to describe weak ferromagnetic metals. In 1959, Alexei Abrikosov and I. E. Dzyaloshiski put forth a theoretical description of a ferromagnetic fermi liquid [1]. In 2001, Kevin Bedell and Krastan Blagoev showed that a non-trivial contribution to the dispersion of the ferromagnetic current spin wave arises from the necessary consideration of higher harmonic moments in the distortion of the fermi surface from its ground state [8]. In the chapters to follow, the author presents new results for transverse spin waves in a fermi liquid, which arise from a novel ground state of a fermi liquid-one in which an l = 1 harmonic distortion exists in the ground state polarization. It is shown that such an instability can lead to spin waves with dispersions that are characterized by a linear dependence on the wave number at long wavelengths, or can lead to spin waves that are characterized by a square root dependence on the wave number at long wavelength. The author also presents new results for spin waves in a fermi liquid that has a spin density wave in its ground state. A spin density wave is characterized by a spiral magnetization in the ground state, and is observed to occur in materials such as MnSi.

Feldmann, John Delaney


Bewehrte Betonbauteile unter Betriebsbedingungen: Forschungsbericht  

NASA Astrophysics Data System (ADS)

Vorwort. Teil I: Ribreiten (Gert Knig) 1 Ein mechanisches Modell zur Erhhung der Vorhersagegenauigkeit ber die Ribreiten unter Betriebsbedingungen (Gert Knig und Michael Fischer). 1.1 Einleitung und Zielsetzung. 1.2 Versuchsprogramm. 1.3 Metechnik. 1.4 Belastung und Versuchsdurchfhrung. 1.5 Literatur. 2 Ribreiten und Verformungszunahme vorgespannter Bauteile unter wiederholter Last - und Zwangbeanspruchung (Gert Knig und Michael Fischer). 2.1 Einleitung und Zielsetzung. 2.2 Versuchsprogramm. 2.3 Auswertung. 2.4 Ausblick. 2.5 Literatur. 3 Riverhalten von Beton bei pltzlicher Abkhlung (Viktor Mechtcherine und Harald S. Mller). 3.1 Einleitung. 3.2 Experimentelle Untersuchungen. 3.3 Formulierung eines Stoffgesetzes fr thermisch beanspruchten Beton. 3.4 Ri entwicklung in einer Betonplatte unter Temperaturschock. 3.5 Zusammenfassung. 3.6 Literatur. 4 Stahlfaserbeton unter Betriebsbedingungen bei Dauerbeanspruchung (Bo Soon Kang, Bernd Schntgen und Friedhelm Stangenberg). 4.1 Einleitung. 4.2 Wirkung von Stahlfasern im Beton. 4.3 Versuchsprogramm. 4.4 Untersuchungen zum Verbundverhalten. 4.5 Untersuchungen zum Verhalten unter Biegebeanspruchung. 4.6 Theoretische Untersuchungen. 4.7 Literatur. 5 Experimentelle Untersuchungen an Stahlbeton-Zugkrpern unter wiederholter Belastung zur Ermittlung des versteifenden Einflusses der Mitwirkung des Betons zwischen den Rissen (Petra Seibel und Gerhard Mehlhorn). 5.1 Einleitung. 5.2 Ansatz zur Bestimmung der Mitwirkung des Betons zwischen den Rissen nach Eurocode 2, Model Code 90 und Gnther. 5.3 Experimentelle Untersuchungen. 5.4 Ergebnisse. 5.5 Zusammenfassung. 5.6 Literatur. 6 Ri- und Verformungsverhalten von vorgefertigten Spannbetontrgern unter Betriebsbedingungen bei besonderer Bercksichtigung des Betonalters (Monika Maske, Heinz Meichsner und Lothar Schubert). 6.1 Einleitung. 6.2 Beschreibung der Fertigteiltrger. 6.3 Belastungsversuche. 6.4 Ergebnisse. 6.5 Zusammenfassung. 6.6 Literatur. Teil II: Verbundfragen (Rolf Eligehausen). 1 Ein mechanisches Modell zur Beschreibung des Verbundverhaltens zwischen Stahl und Beton (Gert Knig, Nguyen V. Tue und Wolfgang Kurz). 1.1 Einleitung. 1.2 Beschreibung der Kraftbertragung zwischen Stahl und Beton. 1.3 Vorstellung des Modells. 1.4 Materialgesetze fr die Berechnung der Verformung des Fachwerks. 1.5 Vergleich zwischen Versuch und Modell. 1.6 Zusammenfassung und Ausblick. 1.7 Literatur. 2 Verbund unter nicht ruhender Beanspruchung (Rainer Koch und Gyrgy L. Balzs). 2.1 bersicht ber die durchgefhrten Versuche. 2.2 Versuchkrper und Materialien. 2.3 Versuchseinrichtungen. 2.4 Versuche und Ergebnisse. 2.5 Zusammenfassung und Ausblick. 2.6 Literatur. 3 Trag- und Verformungsverhalten von Stahlbetontragwerken unter Betriebsbelastung (Thomas M. Sippel und Rolf Eligehausen). 3.1 Einleitung. 3.2 Allgemeines. 3.3 Rechenmodell und Materialmodelle. 3.4 Vergleich zwischen Versuchen und Rechnung. 3.5 Parameterstudien. 3.6 Vereinfachtes Rechenmodell. 3.7 Zusammenfassung. 3.8 Literatur. 4 Verbundverhalten von Spanngliedern mit nachtrglichem Verbund unter Betriebsbedingungen (Josef Hegger, Norbert Will und Heiner Cordes). 4.1 Einfhrung. 4.2 Verbundverhalten von Spanngliedern. 4.3 Zeitabhngige Effekte des Verbunds. 4.4 Versuche unter statischer Langzeitbeanspruchung. 4.5 Versuche unter dynamischer Langzeitbeanspruchung. 4.6 Bemessungsvorschlag fr Verbundkennwerte. 4.7 Zusammenfassung. 4.8 Literatur. 5 Spannungsumlagerungen in gemischt bewehrten Querschnitten (Josef Hegger, Heiner Cordes und Matthias Rudlof). 5.1 Problemstellung und Zielsetzung. 5.2 Spannungsumlagerungen bei gemischter Bewehrung. 5.3 Versuche an zentrischen Zugkrpern. 5.4 Versuchsergebnisse. 5.5 Ermittlung und Vergleich von Verbundkennwerten. 5.6 Zusammenfassung. 5.7 Literatur. Teil III: Bauteile (Karl Kordina). 1 Einflu von Lngsbeanspruchungen auf den Neigungswinkel der Schubrisse (Marek Los und Ulrich Quast). 1.1 Einleitung. 1.2 Ungerissener Zustand. 1.3 Gerissener Zustand. 1.4 FEM-Berechnungen. 1.5 Zusammenfassung. 1.6 L

Eligehausen, Rolf; Kordina, Karl; Schiel, Peter




SciTech Connect

Radioecology is the study of the fate and transport and potential effects of radionuclides and associated contaminants in the environment. In short, it is the science that describes the fundamental connection between environmental health and human health risks. As such, radioecology can and has provided the credible, consistent and defensible basis for the successful and cost-effective environmental cleanup and closure of nuclear production and waste sites. In addition, radioecology also provides the technical basis for making timely and reliable decisions on cleanup in the aftermath of nuclear incidents such as Chernobyl and Fukushima. The 1986 Chernobyl Nuclear Power Plant (ChNPP) accident resulted in catastrophic health, social, and economic consequences in many countries, predominantly, Ukraine, Belarus, and Russia. The extent of radioactive contamination, levels and forms of contamination, and diversity of the ecosystems affected by the accident did not have any precedent and provided unique opportunities for environmental scientists around the world. Following the natural course of their development, populations of species and their communities found themselves in conditions of chronic radiation exposure that exceeded the natural background by factors of hundreds and thousands. Anything similar would have been extremely difficult if not impossible to recreate in a scientific laboratory. Consequently, since the first few years after the accident, many teams of scientists have visited the Chernobyl Exclusion Zone (ChEZ). The knowledge gained by studying the consequences of this accident has tremendous importance. The concept of an international research and technical center to address the problems involving nuclear and radiological accidents became a reality with the establishment of the International Chernobyl Center (ICC). In May 1995, the US and Ukraine signed a Protocol of Intent on establishment of the ICC, and the government of Ukraine appealed to the international scientific community to support ICC and join its activities (Chernobyl Center 2006). In December 1995, a memorandum of understanding (MOU) on the ChNPP closure was signed by the government of Ukraine, all of the G7 governments, and the European Commission. The ICC foundation was considered critical to ensure the safe decommissioning of the ChNPP reactor units and improvement of the safety of the Chernobyl Containment Shelter. On the 10th anniversary of the Chernobyl accident (26 April 1996), Mr. Viktor Yushchenko, the President of Ukraine, issued a decree to establish the Chernobyl Center for Nuclear Safety, Radioactive Waste and Radioecology (Chernobyl Center). On the same day, a MOU involving the US participation in Chernobyl Center activities was signed by the US and Ukraine (Chernobyl Center 2006). In July 1998, the US and Ukraine signed an agreement to establish the International Radioecology Laboratory (IRL) as part of the Chernobyl Center. The creation of IRL was a logical continuation of previous programs to conduct scientific research in radioecology and provide Ukraine and the rest of the world with the necessary infrastructure and scientific basis to conduct research in radioecology, radiobiology, dosimetry, and environmental protection in the ChEZ (Chernobyl Center 2006). A recent collaborative effort with IRL has been implemented through a project titled 'Long-term impacts from radiation/contamination within the Chernobyl Exclusion Zone' (Farfan et al. 2008; Gerdes et al. 2009; Marra et al. 2010). This collaboration had the following objectives: (1) Assess the long-term impacts to the environment from radiation exposure within the ChEZ; (2) Provide information on remediation guidelines and ecological risk assessment within radioactively contaminated territories based on the results of long-term field monitoring, analytical measurements, and numerical modeling of soils and groundwater radioactive contamination; and (3) Recommend the development and testing of effective cleanup technologies to reduce environmental and health risks. Based o

Farfan, E.



EDITORIAL: Message from the Editor Message from the Editor  

NASA Astrophysics Data System (ADS)

As usual, being an even year, the 23rd IAEA Fusion Energy Conference took place at Daejeon, Korea. The event was notable not just for the quality of the presentations but also for the spectacular opening ceremony, in the presence of the Prime Minister, Kim Hwang-sik. The Prime Minister affirmed the importance of research into fusion energy research and pledged support for ITER. Such political visibility is good news, of course, but it brings with it the obligation to perform. Fortunately, good performance was much in evidence in the papers presented at the conference, of which a significant proportion contain 'ITER' in the title. Given this importance of ITER and the undertaking by the Nuclear Fusion journal to publish papers associated with Fusion Energy Conference presentations, the Nuclear Fusion Editorial Board has decided to adopt a simplified journal scope that encompasses technology papers more naturally. The scope is available from but is reproduced here for clarity: Nuclear Fusion publishes articles making significant advances to the field of controlled thermonuclear fusion. The journal scope includes: the production, heating and confinement of high temperature plasmas; the physical properties of such plasmas; the experimental or theoretical methods of exploring or explaining them; fusion reactor physics; reactor concepts; fusion technologies. The key to scope acceptability is now '....significant advances....' rather than any particular area of controlled thermonuclear fusion research. It is hoped that this will make scope decisions easier for the Nuclear Fusion office, the referees and the Editor.The Nuclear Fusion journal has continued to make an important contribution to the research programme and has maintained its position as the leading journal in the field. This is underlined by the fact that Nuclear Fusion has received an impact factor of 4.270, as listed in ISI's 2009 Science Citation Index. The journal depends entirely on its authors and referees and so I would like to thank them all for their work in 2010 and look forward to a continuing, successful collaboration in 2011. Refereeing The Nuclear Fusion editorial office understands how much effort is required of our referees. The Editorial Board decided that an expression of thanks to our most loyal referees is appropriate and so, since January 2005, we have been offering the top ten most active referees over the past year a personal subscription to Nuclear Fusion with electronic access for one year, free of charge. This year, two of the top referees have reviewed four or more manuscripts in the period November 2009 to November 2010 and provided particularly detailed advice to the authors. We have excluded our Board Members, Guest Editors of special editions and those referees who were already listed in the last four years. Guest Editors' work on papers submitted to their special issues is also excluded from consideration. The following people have been selected: Osamu Naito, Japan Atomic Energy Agency, Naka, Japan Masahiro Kobayashi, National Institute for Fusion Science, Toki, Japan Duccio Testa, Lausanne Federal Polytechnic University, Switzerland Vladimir Pustovitov, Russian Research Centre, Kurchatov Insitute, Russia Christopher Holland, University of California at San Diego, USA Yuri Gribov, ITER International Organisation, Cadarache, France Eriko Jotaki, Kyushu University, Japan Sven Wiesen, Jlich Research Centre, Germany Viktor S. Marchenko, Ukraine National Academy of Sciences, Ukraine Richard Stephens, General Atomics, USA In addition, there is a group of several hundred referees who have helped us in the past year to maintain the high scientific standard of Nuclear Fusion. At the end of this issue we give the full list of all referees for 2010. Our thanks to them! Authors The winner of the 2010 Nuclear Fusion Award was J.E. Rice et al for the paper entitled 'Inter-machine comparison of intrinsic toroidal rotation in tokamaks' (2007 Nucl. Fusion 47 1618-24). The prize was awarde

Thomas, Paul



Vigrishinite, Zn2Ti4 - x Si4O14(OH,H2O,?)8, a new mineral from the Lovozero alkaline complex, Kola Peninsula, Russia  

NASA Astrophysics Data System (ADS)

A new mineral vigrishinite, epistolite-group member and first layer titanosilicate with species-defining Zn, was found at Mt. Malyi Punkaruaiv, in the Lovozero alkaline complex, Kola Peninsula, Russia. It occurs in a hydrothermally altered peralkaline pegmatite and is associated with microcline, ussingite, aegirine, analcime, gmelinite-Na, and chabazite-Ca. Vigrishinite forms rectangular or irregularly shaped lamellae up to 0.05 2 3 cm flattened on [001]. They are typically slightly split and show blocky character. The mineral is translucent to transparent and pale pink, yellowish-pinkish or colorless. The luster is vitreous. The Mohs' hardness is 2.5-3. Vigrishinite is brittle. Cleavage is {001} perfect. D meas = 3.03(2), D calc = 2.97 g/cm3. The mineral is optically biaxial (-), ? = 1.755(5), ? = 1.82(1), ? = 1.835(8), 2 V meas = 45(10), 2 V calc = 50. IR spectrum is given. The chemical composition (wt %; average of 9 point analyses, H2O is determined by modified Penfield method) is as follows: 0.98 Na2O, 0.30 K2O, 0.56 CaO, 0.05 SrO, 0.44 BaO, 0.36 MgO, 2.09 MnO, 14.39 ZnO, 2.00 Fe2O3, 0.36 Al2O3, 32.29 SiO2, 29.14 TiO2, 2.08 ZrO2, 7.34 Nb2O5, 0.46 F, 9.1 H2O, -0.19 O=F2, total is 101.75. The empirical formula calculated on the basis of Si + Al = 4 is: H7.42(Zn1.30Na0.23Mn0.22Ca0.07Mg0.07K0.05Ba0.02)?1.96(Ti2.68Nb0.41Fe{0.18/3+}Zr0.12)?3.39(Si3.95Al0.05)?4 20.31F0.18. The simplified formula is: Zn2Ti4- x Si4O14(OH,H2O,?)8 ( x < 1). Vigrishinite is triclinic, space group P , a = 8.743(9), b = 8.698(9), c = 11.581(11), ? = 91.54(8), ? = 98.29(8), ? = 105.65(8), V = 837.2(1.5) 3, Z = 2. The strongest reflections in the X-ray powder pattern ( d, , - I[ hkl]) are: 11.7-67[001], 8.27-50[100], 6.94-43[01, 10], 5.73-54[11, 002], 4.17-65[020, 2, 200], and 2.861-100[30, 22, 004, 11]. The crystal structure model was obtained on a single crystal, R = 0.171. Vigrishinite and murmanite are close in the structure of the TiSiO motif, but strongly differ from each other in part of large cations and H-bearing groups. Vigrishinite is named in honor of Viktor G. Grishin (b. 1953), a Russian amateur mineralogist and mineral collector, to pay tribute to his contribution to the mineralogy of the Lovozero Complex. The type specimen is deposited in the Fersman Mineralogical Museum of Russian Academy of Sciences, Moscow.

Pekov, I. V.; Britvin, S. N.; Zubkova, N. V.; Chukanov, N. V.; Bryzgalov, I. A.; Lykova, I. S.; Belakovskiy, D. I.; Pushcharovsky, D. Yu.



EDITORIAL: Focus on Carbon Nanotubes  

NASA Astrophysics Data System (ADS)

The study of carbon nanotubes, since their discovery by Iijima in 1991, has become a full research field with significant contributions from all areas of research in solid-state and molecular physics and also from chemistry. This Focus Issue in New Journal of Physics reflects this active research, and presents articles detailing significant advances in the production of carbon nanotubes, the study of their mechanical and vibrational properties, electronic properties and optical transitions, and electrical and transport properties. Fundamental research, both theoretical and experimental, represents part of this progress. The potential applications of nanotubes will rely on the progress made in understanding their fundamental physics and chemistry, as presented here. We believe this Focus Issue will be an excellent guide for both beginners and experts in the research field of carbon nanotubes. It has been a great pleasure to edit the many excellent contributions from Europe, Japan, and the US, as well from a number of other countries, and to witness the remarkable effort put into the manuscripts by the contributors. We thank all the authors and referees involved in the process. In particular, we would like to express our gratitude to Alexander Bradshaw, who invited us put together this Focus Issue, and to Tim Smith and the New Journal of Physics staff for their extremely efficient handling of the manuscripts. Focus on Carbon Nanotubes Contents <;A article="1367-2630/5/1/117">Transport theory of carbon nanotube Y junctions R Egger, B Trauzettel, S Chen and F Siano The tubular conical helix of graphitic boron nitride F F Xu, Y Bando and D Golberg Formation pathways for single-wall carbon nanotube multiterminal junctions Inna Ponomareva, Leonid A Chernozatonskii, Antonis N Andriotis and Madhu Menon Synthesis and manipulation of carbon nanotubes J W Seo, E Couteau, P Umek, K Hernadi, P Marcoux, B Lukic, Cs Mik, M Milas, R Gal and L Forr Transitional behaviour in the transformation from active end planes to stable loops caused by annealing M Endo, B J Lee, Y A Kim, Y J Kim, H Muramatsu, T Yanagisawa, T Hayashi, M Terrones and M S Dresselhaus Energetics and electronic structure of C70-peapods and one-dimensional chains of C70 Susumu Okada, Minoru Otani and Atsushi Oshiyama Theoretical characterization of several models of nanoporous carbon F Valencia, A H Romero, E Hernndez, M Terrones and H Terrones First-principles molecular dynamics study of the stretching frequencies of hydrogen molecules in carbon nanotubes Gabriel Canto, Pablo Ordejn, Cheng Hansong, Alan C Cooper and Guido P Pez The geometry and the radial breathing mode of carbon nanotubes: beyond the ideal behaviour Jeno Krti, Viktor Zlyomi, Miklos Kertesz and Sun Guangyu Curved nanostructured materials Humberto Terrones and Mauricio Terrones A one-dimensional Ising model for C70 molecular ordering in C70-peapods Yutaka Maniwa, Hiromichi Kataura, Kazuyuki Matsuda and Yutaka Okabe Nanoengineering of carbon nanotubes for nanotools Yoshikazu Nakayama and Seiji Akita Narrow diameter double-wall carbon nanotubes: synthesis, electron microscopy and inelastic light scattering R R Bacsa, E Flahaut, Ch Laurent, A Peigney, S Aloni, P Puech and W S Bacsa Sensitivity of sin



PREFACE: International Conference on Functional Materials and Nanotechnologies 2013 (FM&NT2013)  

NASA Astrophysics Data System (ADS)

The International Conference Functional Materials and Nanotechnologies (FM&NT - 2013) was held in Tartu, 21-24 April 2013 at the Dorpat Conference Centre. The conference was organised by Institute of Physics, University of Tartu. The FM&NT conference series was started in 2006 by scientists from the Institute of Solid State Physics, University of Latvia. It is an annual conference bringing together researchers from the whole world. The warm and open atmosphere of this scientific conference has turned it into event where people from different fields meet under the common name of functional materials and nanotechnology. It is particularly important for early stage scientists who are looking for new knowledge and contact with people from various fields. Our Latvian colleagues with their success in internationalization made us neighbouring Estonians so envious that we could not withstand proposing that we host the conference in every second year in Estonia. Actually this is in a way the continuation of the idea of the famous Baltic seminars which took place over several decades during the last century. Due to political constraints these seminars were only opened to scientist of the former Eastern European countries, but which were extremely popular and attracted attendees from over the whole Soviet Union. Much fruitful cooperation started from the initial personal contacts of scientists at these seminars held twice per year, once in Latvia and the second time in Estonia. At the last FM&NT 2012 conference, the decision was made that Institute of Physics, University of Tartu would organise the event in Tartu in 2013. Along with traditional topics such as multifunctional materials, nanomaterials, materials for sustainable energy applications and theory, this conference focused on studies using synchrotron radiation and other novel light sources. The number of registered participants from 21 countries was nearly 300. During the three days of the conference 14 invited, 45 oral, and 5 commercial talks were delivered and more than 200 posters were presented. In the framework of conference more than 20 papers were submitted to a topical issue of Physica Scripta. Based on the work presented at the conference, 62 articles are included in this volume of IOP Conference Series: Materials Science and Engineering. Additional information about FM&NT-2013 is available at its homepage The Organizing Committee would like to thank all the speakers, contributors, session chairs, referees and other involved staff for their efforts in making FM&NT-2013 successful. Special thanks for their hard work dealing with the conference papers goes to the Guest Editors: Professor Mikhail Brik, Dr Svetlana Zazubovits, Dr Arvo Kikas, Dr Rainer Prna. The Organizing Committee hopes that Conference gave participants good insight into recent developments in nanotechnology, sustainable energetics, processing and modelling of multifunctional materials and research done using synchrotron radiation or other novel light sources. We sincerely hope that conference has provided support for the sharing of information and has brought together many young and experienced scientists from different fields, leading to fruitful discussions. We hope that all participants had good and memorable time in Tartu. On the behalf of organising committee Professor Ergo Nmmiste Dr Marco Kirm Dr Toomas Plank The PDF also contains lists of the committees, the conference photograph and the sponsor's logos.

Nmmiste, Ergo; Kirm, Marco; Plank, Toomas