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Viktor Ambartsumian: Life and Activities  

NASA Astrophysics Data System (ADS)

The booklet is dedicated to the outstanding Armenian astronomer and one of the great scientists of the XX century Viktor Ambartsumian. He has fundamentally contributed in various fields of astronomy and astrophysics, cosmogony, theoretical physics, mathematics, and philosophy. Ambartsumian was a great organizer of science, important political and public figure. He was the Director of BAO in 1946-1988, the President of the Armenian Academy of Sciences in 1947-1993, the President of the International Astronomical Union (IAU) in 1961-1964 and the President of the International Council of Scientific Unions (ICSU) in 1968-1972.

Mickaelian, Areg M.



Photoaligned Vertical Aligned Nematic Mode in Liquid Crystals Viktor KONOVALOV  

E-print Network

of liquid crystal (LC) aligning in liquid crystal display (LCD) cells is widely used and providesPhotoaligned Vertical Aligned Nematic Mode in Liquid Crystals Viktor KONOVALOV Ã? , Vladimir; published January 13, 2004) The photoaligned vertical aligned nematic (VAN) mode in liquid crystals (LC

Kwok, Hoi S.


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

Microsoft Academic Search

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




E-print Network

ENERGY EFFICIENT PARAMETERIZED FFT ARCHITECTURE Ren Chen, Hoang Le, and Viktor K. Prasanna Ming Fourier Transform (FFT) for energy efficient designs on FPGAs. Parameterized FFT ar- chitecture parallelism, that char- acterize the decomposition based FFT algorithms. After em- pirical selection

Prasanna, Viktor K.


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.



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 with the neutron scattering data. The cubic -NbN superconducting phase possesses a bulk modulus of 348 GPa

Wu, Zhigang


Quasi-Online Reinforcement Learning for Robots Bram Bakker, Viktor Zhumatiy, Gabriel Gruener, and Jurgen Schmidhuber  

E-print Network

-Lugano, Switzerland, {viktor, juergen} CSEM, Alpnach, Switzerland, §TU Munich: while a robot is exploring its environment, in the back- ground a probabilistic model of the environment is built on the fly as new experiences arrive; the policy is trained concurrently based on this model using

Schmidhuber, Juergen


The Search for Meaning in the Shadow of Auschwitz: Tadeusz Borowski and Viktor Frankl.  

ERIC Educational Resources Information Center

Recommends using the work of psychoanalyst and concentration camp survivor, Viktor Frankl, as a counterpoint and complement to the death camp stories of Tadeusz Borowski. Frankl's work on his own and others' experiences provides a context and approach to Borowski's cynical and nihilistic stories. (MJP)

Dumbleton, Susanne; Soleau, Jeffrey K.



100+ Gbps IPv6 Packet Forwarding on Multi-Core Thilan Ganegedara, Viktor Prasanna  

E-print Network

100+ Gbps IPv6 Packet Forwarding on Multi-Core Platforms Thilan Ganegedara, Viktor Prasanna Ming, prasanna} Abstract--The migration from IPv4 to IPv6 addressing is gradually taking place and route IPv6 packets. However, with the increased complexity of the lookup operation and storage

Prasanna, Viktor K.


Phantm: PHP Analyzer for Type Mismatch Etienne Kneuss Philippe Suter Viktor Kuncak  

E-print Network

for PHP 5 based on data­flow analysis. Phantm is an open­source tool written in Scala and available fromPhantm: PHP Analyzer for Type Mismatch Etienne Kneuss Philippe Suter Viktor Kuncak School in PHP applications. Phantm can infer types for nested arrays, and can lever­ age runtime information

Kuncak, Viktor


Phantm: PHP Analyzer for Type Mismatch Etienne Kneuss Philippe Suter Viktor Kuncak  

E-print Network

for PHP 5 based on data-flow analysis. Phantm is an open-source tool written in Scala and available fromPhantm: PHP Analyzer for Type Mismatch Etienne Kneuss Philippe Suter Viktor Kuncak School in PHP applications. Phantm can infer types for nested arrays, and can lever- age runtime information

Kuncak, Viktor


Developing a Multigrid Solver for Standing Wave Equation By: Janis Voigtlander, Viktor Kuncak  

E-print Network

Developing a Multigrid Solver for Standing Wave Equation By: Janis Voigtl¨ander, Viktor Kuncak technique is adapted for solving standing one-dimensional wave equation with radiation boundary conditions the multigrid technique is used to solve the discrete problems, obtained by discretization of standing wave

Kuncak, Viktor


Developing a Multigrid Solver for Standing Wave Equation By: Janis Voigtlander, Viktor Kuncak  

E-print Network

Developing a Multigrid Solver for Standing Wave Equation By: Janis VoigtlË?ander, Viktor Kun technique is adapted for solving standing one­dimensional wave equation with radiation boundary conditions the multigrid technique is used to solve the discrete problems, obtained by discretization of standing wave

Kuncak, Viktor


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



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 a Xilinx Virtex-II Pro as the target FPGA device. Implementation statistics and perfor- mance estimates

Prasanna, Viktor K.


Viktor Suvorov and Operation Barbarossa: Tukhachevskii Revisited  

Microsoft Academic Search

On the sixth of July 1941 at 0330 hrs Moscow Time, tens of thousands of Soviet guns tore the silence into shreds, informing the world that the Red Army’s great liberating march had begun. The Red Army’s artillery, in numbers and quality, is superior to the rest of the whole world’s titanic reserves of ammunition were concentrated at the Soviet

David M. Humpert



FranzViktor Kuhlmann Henselian Function Fields  

E-print Network

for valued fields when I started my thesis. The negative result states that algebraically complete fields the axiom system may possibly be completed. At several instances throughout my work it turned out are called "defectless", and the following is a main question studied in my work: when does an extension

Kuhlmann, Franz-Viktor



E-print Network

and all polynomials f in K[X1,...,Xn], the set {f(a1,...,an) | a1,...,an in the valuation ring} has a maximum (which is allowed to be infinity, which is the case if f has a zero in the valuation ring, inimitable way which will make you want to take part, to roll up your sleeves, and to see beyond the horizon

Sinnamon, Gordon J.


FranzViktor Kuhlmann: Teaching Philosophy (2 pages) Page 1 FranzViktor Kuhlmann: Teaching Philosophy  

E-print Network

are one of the main gateways to science. Let me give some details about undergraduate courses that I have discussed with students and colleagues the problem of harmonizing the curriculum of mathematics to write mathematics (on a computer, whenever possible). The subject and the amount of material

Kuhlmann, Franz-Viktor


ORIGINAL ARTICLE Jarmila Navra tilova . Viktor Horva th . Alois Kozubik .  

E-print Network

. Joseph Lipsick . Jan S marda p53 arrests growth and induces differentiation of v-Myb-transformed monoblasts Received August 23, 2006; accepted in revised form December 5, 2006 Abstract The p53 protein can expression of p53 can resume capability of cell cycle arrest, differentiation, and apop- tosis in various

Lipsick, Joseph S.



E-print Network

century [1]. In the 18th century, the Swiss mathematician Leonhard Euler found a closed form expression. History 1 2. Definition and basic properties 1 3. Euler product 2 4. Evaluating zeta at particular points. Euler product Euler gave this identity: (s) = k=1 1 1 - p-s k where pk is the k-th prime number. Proof

May, J. Peter


Reducing Dynamic Power Dissipation in Pipelined Forwarding Engines Weirong Jiang and Viktor K. Prasanna  

E-print Network

to perform an IP lookup, This work is supported by the United States National Science Founda- tion under 90089, USA {weirongj, prasanna} Abstract-- Power consumption has become a limiting factor low power. This paper proposes several novel architecture-specific techniques to reduce the dynamic

Prasanna, Viktor K.


Survey on Directed Model Checking Stefan Edelkamp, Viktor Schuppan, Dragan Bosnacki, Anton Wijs, Ansgar  

E-print Network

the burden to find short coun- terexamples for design bugs quickly. Driven by the success of directed state of probabilistic counterexamples, and for scheduling problems. 2 History of Directed Model Checking Elements

Paris-Sud XI, Université de


Looking back, What's ahead Yves Robert Per Stenstrom Viktor K. Prasanna  

E-print Network

-dimensional Systems developed and implemented a simulation code that gives insight into how electromagnetic waves can of software. If the past history of this adaptive nature of linear algebra software is any guide to radio frequency (RF) waves in the fast wave time scale leads to solving the generalized Helmholtz

Dongarra, Jack


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 with strong electron correlations is high- pressure-induced insulator-metal transition (I-M), which

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



Small dependencies and large actuarial risks Willem Albers, Wilbert C.M. Kallenberg and Viktor Lukocius  

E-print Network

is developed, which covers what happens in practice in a realistic way. Moreover, it is also flexible hurricanes or floods hitting numerous insured at the same time). For quite some time, such effects as compared to the corresponding independent case. Hence there is ample cause to take small dependence effects

Al Hanbali, Ahmad


Issues in Designing Middleware for Wireless Sensor Yang Yu, Bhaskar Krishnamachari, and Viktor K. Prasanna  

E-print Network

routing and communication protocols for WSNs [1], the fundamental problem of identifying and developing, a WSN consists of hundreds to thousands of tiny sensor nodes that communicate over wireless channels. Therefore, the design of the network protocols and applications are usually closely-coupled, or even

Krishnamachari, Bhaskar


Adaptive Matrix Multiplication in Heterogeneous Environments Bo Hong and Viktor K. Prasanna  

E-print Network

con- tract F33615-99-1-1483 monitored by Wright Patterson Air force Base and in part by the National at run time. This is particularly true in £ Supported by the DARPA Data Intensive Systems Program under a numerical linear algebra library for the Grid. This library is based on ScaLAPACK [14]. However, Sca

Prasanna, Viktor K.


Smart grid research Viktor K. Prasanna is the Charles Lee Powell Chair in Engineering in the Ming Hsieh  

E-print Network

of Southern California. He is the executive director of the USC-Infosys Center for Advanced Software/IT for integrating and optimizing assets in the energy domain. Areas of research Software architecture to support Management ­ IAM) IAM A comprehensive transformation app

Levi, Anthony F. J.


Towards a Model-based Application Integration Framework for Smart Oilfields Cong Zhang, Amol Bakshi, Viktor Prasanna  

E-print Network

with each other. With an integration framework, completely new synergies, such as new optimizations, col in which another software project can be or- ganized and developed [3]. Generally, a framework consists to communicate; (ii) data transformation logic; (iii) abstract interfaces to insulate the framework from existing

Prasanna, Viktor K.


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



[Viktor Emil v. Gebsattel and Maria v. Stach. New light on two participants of the 3rd psychoanalytical congress at Weimar (1911)].  


Starting from the famous group photo of the Weimar congress, the article focuses on two of the participants portrayed who up to now have remained more or less unidentified, providing an outline of their lives. While v. Gebsattel was just about to start his career as psychotherapist in 1911, the feminist journalist v. Stach seems to have withdrawn into private life. PMID:22164712

von Minden, Stephan



Magnetic transition in compressed Fe3C from x-ray emission spectroscopy Jung-Fu Lin, Viktor V. Struzhkin, Ho-kwang Mao, and Russell J. Hemley  

E-print Network

of hexagonal close packed layers of iron atoms with carbon atoms occupying interstitial sites. The iron atoms-principles calculations also show that the nonmagnetic phase has a high bulk modulus K0 of 316 GPa [with the pressure derivative of the bulk modulus K0 of 4.3]. The possible transition has consequences for the pos- sible

Lin, Jung-Fu "Afu"


Aircraft Microphysical Documentation from Cloud Base to Anvils of Hailstorm Feeder Clouds in Argentina  

E-print Network

Weather Consultants, Littleton, Colorado TERRENCE W. KRAUSS AND VIKTOR MAKITOV Weather Modification, Inc was implemented by Weather Modification, Inc., (WMI) of Fargo, North Dakota, for the Ministry of Economy

Daniel, Rosenfeld


Axisymmetric flows in Hall-MHD: A tendency towards finite-time singularity formation  

E-print Network

,1, Viktor Ruban,2, and Rainer Grauer1, 1 Theoretische Physik I, Ruhr-Universit¨at Bochum, Germany statistics in Burgers turbulence [11­13]. A further example of the importance of nearly singular structures

Grauer, Rainer


Run-Time Adaptation for Grid Environments Ammar H. Alhusaini  

E-print Network

Run-Time Adaptation for Grid Environments Ammar H. Alhusaini Computer Engineering Department Kuwait University P.O. Box 5969, Safat 13060 Kuwait C.S. Raghavendra and Viktor K. Prasanna

Hwang, Kai


The Astronomical Journal, 145:155 (15pp), 2013 June doi:10.1088/0004-6256/145/6/155 C 2013. The American Astronomical Society. All rights reserved. Printed in the U.S.A.  

E-print Network

. Michael Wood-Vasey17 , Eric Agol15 , Carlos Allende Prieto8,9 , Rory Barnes15 , Dmitry Bizyaev18 , Phillip , Martin Paegert1 , Kaike Pan18 , Joshua Pepper1 , Elena Malanushenko18 , Viktor Malanushenko18 , Rafael

Barnes, Rory


New Book Information Interdisciplinarity for the 21st Century  

E-print Network

in Mathematics, Science, and the Arts, Viktor Freiman and Bharath Sriraman. Intercultural Positioning Competence, and the Learning of Mathematics, Tinne Hoff Kjeldsen. The Role of the Aesthetic in Mathematical

Gideon, Rudy A.


-In press at Information Age Publishing, Charlotte, NC-Interdisciplinarity for the 21st Century  

E-print Network

in Mathematics, Science and Arts Viktor Freiman, Bharath Sriraman 2. Intercultural Positioning in Mathematics competence and the learning of mathematics Tinne Hoff Kjeldsen 4. The role of the aesthetic in mathematical

Bardsley, John


FPGA FFT(Fast Fourier Transform) 1 FPGA FFT(Fast Fourier Transform)  

E-print Network

FPGA FFT(Fast Fourier Transform) 1 FPGA FFT(Fast Fourier Transform) Gokul Govindu Viktor K. Prasanna FPGA (FFT) . FPGA FFT . , . . ,radix, Xilinx Virtex-2 . Xilinx 57% 78% . --(EAT) , Xilinx 3-13 . 1) : FFT

Jang, Ju-Wook


Pressure-induced electronic spin transition of iron in magnesiowustite-,,Mg,Fe...O Jung-Fu Lin,1 Alexander G. Gavriliuk,2,3,4 Viktor V. Struzhkin,2 Steven D. Jacobsen,2 Wolfgang Sturhahn,5 Michael Y. Hu,6  

E-print Network

, a classical Mott insulator, is an important member of the highly correlated transition metal monoxide TMO group including NiO, CoO, and MnO.10­18 The Mott insulator- metal transition results from the closure, resulting in the collapse of magnetic state.10 Although Mott insulator-metal transitions in TMO have been

Jacobsen, Steven D.


Bottom up modeling of the connectome: Linking structure and function in the resting brain and their changes in aging  

E-print Network

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 Brain structure changes in agingReview Bottom up modeling of the connectome: Linking structure and function in the resting brain and their changes in aging Tristan T. Nakagawa a, , Viktor K. Jirsa b , Andreas Spiegler b , Anthony R. McIntosh c

Deco, Gustavo



E-print Network

STUDY OF THE PROPERTIES OF BIOTIN-STREPTAVIDIN SENSITIVE BIOFETS Thomas Windbacher, Viktor Keywords: BioFET, Field-effect biosensor, Biotin-streptavidin, Simulation, Multi-scale problem, Interface conditions. Abstract: In this work the properties of a biotin-streptavidin BioFET have been studied

Ringhofer, Christian


Cosmic Balloons  

ERIC Educational Resources Information Center

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

El Abed, Mohamed



Chance, Creativity, and the Discovery of the Nerve Growth Factor  

Microsoft Academic Search

This essay analyzes the history of the Nerve Growth Factor (NGF) discovery, relating some of the principles of the theory of scientific creativity to the cognitive and personal qualities of the scientists that participated in the discovery, particulary Rita Levi-Montalcini and Viktor Hamburger. The discovery of NGF is especially attractive for the history of science as it involves chance, luck,

Ana Cecilia Rodríguez de Romo



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



International Workshop on Function Spaces and Applications  

E-print Network

. Besov Steklov Institute Moscow / Russia Viktor I. Burenkov Peoples Friendship University of Russia, Moscow / Russia Michail Gol'dman Peoples Friendship University of Russia, Moscow / Russia Dorothee D://www.schloss- This huge castle on the east side of the Unstrut river valley was founded

Novak, Erich


cover image Symmetry-breaking transitions  

E-print Network

: coping with uncertainty Andreas Winter 641 Statistical physics: Physicists get social Luciano Pietronero of the class Alison Wright review article 645 high-temperature superconductivity in iron-based materials a symmetry breaking transition Roman Yusupov, Tomaz Mertelj, Viktor V. Kabanov, Serguei Brazovskii, Primoz

Loss, Daniel


The Importance of Self-Identification in Art, Culture, and Ethnicity  

ERIC Educational Resources Information Center

The Lowenfeld Award was established in 1960 by friends and former students of Viktor Lowenfeld (widely acknowledged as the most influential art educator of the 20th century) to honor an NAEA member who has made significant contributions to the field of art education through the years. This article reports on the 2012 recipient, Bernard Young,…

Young, Bernard



Church attendance, meaningfulness of religion, and depressive symptomatology among adolescents  

Microsoft Academic Search

Self-administered questionnaires were completed by 451 adolescents at a public high school in Texas during the spring semester 1989. The instrument used contained the Beck Depression Inventory (BDI) and items to determine participants' gender, frequency of church attendance, and meaningfulness of one's religion. Based on social support research and the writings of Carl Jung and Viktor Frankl, it was predicted

Loyd S. Wright; Christopher J. Frost; Stephen J. Wisecarver



POSTER PRESENTATION Open Access Dynamics of neural systems in epilepsy  

E-print Network

POSTER PRESENTATION Open Access Dynamics of neural systems in epilepsy Kenza EL Houssaini* , Viktor 2013 Epilepsy is a nervous system disorder. It is characterized by a brain dysfunction activity in epilepsy. BMC Neuroscience 2013 14(Suppl 1):P124. * Correspondence: UMR 1106

Paris-Sud XI, Université de


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



Radiative conductivity in the Earth's lower mantle Alexander F. Goncharov1  

E-print Network

. The lower mantle extends from the 660-km seismic discontinuity to the core­mantle boundary at 2,900 km depthLETTERS Radiative conductivity in the Earth's lower mantle Alexander F. Goncharov1 , Benjamin D. Haugen1,2 , Viktor V. Struzhkin1 , Pierre Beck1 & Steven D. Jacobsen3 Iron in crustal and mantle minerals

Jacobsen, Steven D.


The Montana Mathematics Enthusiast ISSN 1551-3440  

E-print Network

Alaeiyan, Iran University of Science and Technology, Iran Miriam Amit, Ben-Gurion University of the Negev Blomhøj, Roskilde University, Denmark Robert Carson, Montana State University- Bozeman, USA Mohan, Ben-Gurion University of the Negev, Israel Paul Ernest, University of Exeter, UK Viktor Freiman

Gideon, Rudy A.


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.


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.


VOLUME 78, NUMBER 23 P H Y S I C A L R E V I E W L E T T E R S 9 JUNE 1997 Cascading Fermi Resonances and the Soft Mode in Dense Ice  

E-print Network

in this pres- sure range. The frequencies of the infrared modes de- crease from 3150 3220 cm21 (ice I at zero Resonances and the Soft Mode in Dense Ice Viktor V. Struzhkin,* Alexander F. Goncharov, Russell J. Hemley resonances in compressed H2O and D2O ices up to and through the transition to the symmetric hydrogen

Hemley, Russell J.


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 Hess’s historical experiment that demonstrated the existence of ionizing radiation from the sky—later called cosmic radiation. This discovery earned him the Nobel Prize for Physics in 1936.

El Abed, Mohamed



Nature Macmillan Publishers Ltd 1997 Superconductivity at 1017K  

E-print Network

for a transition to a metallic phase at 90 GPa (room temperature)2 . Subsequent X-ray diffraction studies3-pressure measurements of superconductivity in Se and Te show evidence for maximum critical temperatures of 5.6 and 7.4 KNature © Macmillan Publishers Ltd 1997 Superconductivity at 10­17K in compressed sulphur Viktor V

Hemley, Russell J.


Frankl's concept of time: Existential psychotherapy with couples and families  

Microsoft Academic Search

In this article, Viktor Frankl's ideas about time are used to outline the basic curative factors in an Existential approach to psychotherapy with couples and families. In this approach, the future includes meaning potentials that are available to the couple or family; the present is the time to actualize such meaning potentials; and the past includes these meaning potentials which

Jim Lantz



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.


Frontiers of Energy Resources Saturday, June 26th  

E-print Network

324 Dr. Anupam Madhukar 12:15 pm Lunch EVK 1:45 pm Nuclear Energy: Fission,Breeder and Fusion Reactors.John Heidemann 2 30 I t t d A t M t RTH 3242:30 pm Integrated Asset Management RTH 324 Dr.Viktor Prasanna 3:00 pm

Shahabi, Cyrus


International Conference on Parallel and Distributed  

E-print Network

, U. of Calif. at San Diego, USA Susanne E. Hambrusch, Purdue U., USA Y. Han, U. of Missouri at Kansas, Old Dominion U., USA Michael A. Palis, Rutgers U., USA Yi Pan, Georgia State U., USA Viktor Prasanna of Adaptive Space Sharing to Parallel Job Structure and I/O Models Liuhong Wang and Sivarama Dandamudi

Choi, Byung K.


FPGA-based Cryptography for Internet Security  

E-print Network

communications over the Internet. It is also rapidly becoming the industry standard for VPNs [3]. The remarkable1 FPGA-based Cryptography for Internet Security Viktor K. Prasanna and Andreas Dandalis {prasanna the Internet. However, for transmitting confidential data, the cost-effectiveness and globalism provided

Prasanna, Viktor K.


US and Russia broadly expand science and technology cooperation  

SciTech Connect

The US and Russia agreed late last month to spur cooperation in a broad variety of science- and technology-related programs. The two countries signed agreements boosting collaboration in such areas as basic sciences and engineering, space, biomedical research, environmental protection, nuclear disarmament, energy, and geosciences during a visit to the US by Russian Prime Minister Viktor S. Chernomyrdin. The accords were signed in Washington, DC, at the third meeting of the US-Russian Joint Commission on Economic Technological Cooperation.

Seltzer, R.



Existential psychotherapy with fast-track, suburban couples  

Microsoft Academic Search

In this article, the authors describe the existential situation of the fast-track suburban couple and a treatment approach\\u000a based upon the philosophical concepts of Gabriel Marcel and Viktor Frankl. In this treatment approach, the therapist uses\\u000a availability, primary reflection and secondary reflection treatment experiences to host the client couple's discovery and\\u000a actualization of the meaning potential in their intimate life.

Jim Lantz; Mike Witter



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


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.



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''.



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.



Mutual Lewis Acid–Base Interactions of Cations and Anions in Ionic Liquids  

PubMed Central

Solute properties are known to be strongly influenced by solvent molecules due to solvation. This is due to mutual interaction as both the properties of the solute and of the solvent strongly depend on each other. The present paper is based on the idea that ionic liquids are cations solvated by anions and anions solvated by cations. To show this (in this system strongly pronounced) interaction the long time established donor–acceptor concept for solvents and ions in solution by Viktor Gutmann is extended to ionic liquids. A number of solvent parameters, such as the Kamlet–Abboud–Taft and the Dimroth–Reichardt ET scale for ionic liquids neglect this mutual influence, which, however, seems to be in fact necessary to get a proper description of ionic liquid properties. It is shown how strong such parameters vary when the influence of the counter ion is taken into account. Furthermore, acceptor and donor numbers for ionic liquids are presented. PMID:23180598

Holzweber, Markus; Lungwitz, Ralf; Doerfler, Denise; Spange, Stefan; Koel, Mihkel; Hutter, Herbert; Linert, Wolfgang



Ambartsumyan's concept of active galactic nuclei  

NASA Astrophysics Data System (ADS)

As Victor Ambartsumyan, himself, noted, the concept of active galactic nuclei occupies a special place among his scientific ideas. It was proposed more than half a century ago and was recognized by the U.S. National Academy of Sciences as revolutionary, on a copernican scale. However, by no means all of its propositions were accepted at once by large parts of the astronomy community. Nevertheless, as the American astrophysicist A. R. Sandage has written, “today, not one astronomer would deny the mystery surrounding the nuclei of galaxies or that the first to recognize the rich reward held in this treasury was Viktor Ambartsumian.” The purpose of this article is to acquaint the reader with the major stages in the formation and development of the concept of active galactic nuclei and with some of the work on this topic done at the Byurakan and other astrophysical observatories throughout the world.

Khachikian, E. Ye.



The Aryl Hydrocarbon Receptor: A Review of Its Role in the Physiology and Pathology of the Integument and Its Relationship to the Tryptophan Metabolism  

PubMed Central

The aryl hydrocarbon receptor (AHR) is a cytosolic receptor for low molecular weight molecules, of which the most widely recognized ligand is 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD), and the most widely recognized effect, chloracne. Adverse effects of manipulation were most recently and graphically demonstrated by the poisoning of Viktor Yushchenko during the Ukrainian presidential elections of 2004. However, recent research has revealed a receptor with wide-ranging, and at times, paradoxical actions. It was arguably among the first biological receptors to be utilized by dermatologists, dating from the time of topical tar preparations as a therapeutic agent. I provide a review outlining the role AHR plays in the development, cellular oxidation/antioxidation, responses to ultraviolet light, melanogenesis, epidermal barrier function, and immune regulation and its relationship to tryptophan metabolism. Finally, I will review the role of AHR in diseases of the integument. PMID:25733915

Noakes, Rowland



Dreams of death: Von Weizsäcker's Dreams in so-called endogenic anorexia: a research note.  


Viktor Von Weizsäcker's paper "Dreams in so-called endogenic Magersucht (anorexia," first published in the Deutsche Medizinische Wochenschrift in 1937 (translation in M. Kaufman & M. Heiman [1964]. Evolution of psychosomatic concepts: Anorexia nervosa: A paradigm (pp. 181-197), New York: International Universities Press, has been described as a noteworthy and historically important contribution to the recognition of anorexia nervosa as a psychosomatic illness. Von Weizsäcker analyzed the dreams of patients he was treating for "endogenous anorexia" (magersucht). He claimed that in the bulimic phase his patients experienced nightmares dealing with themes of death, but that in the anorectic phases of restricted eating more pleasant dreams dealt with themes of blissful contentment. The authors draw current attention to his work as another early example of the treatment of the theme of death and death symbolism in the literature on eating disorders, and suggest some reappraisal of von Weizsäcker's interpretations of his own material. PMID:8477306

Jackson, C; Beumont, P J; Thornton, C; Lennerts, W



[The human being from the point of view of animals or, "Who knows whether the breath of men goes upwards?" (Ecclesiastes 3:21)].  


The question of whether animals have souls has been asked since as early as the Old Testament. Where this is believed to be true, fiction has provided interesting models in literature: The human being as seen by animals has been a popular subject since Apuleius' 'Asinus aureus' and how man appears from the perspective of a donkey or a beetle, that is to say the perspective from below, becomes controversial. Examples may be found in all languages and centuries in Jonathan Swift, Miguel Cervantes, E. T. A. Hoffmann, Ludwig Tieck, Heinrich Heine, Viktor von Scheffel, Franz Kafka and others. Résumé at the end: How does man answer this question or his own self-questioning? PMID:10379104

Arendt, D



Ultimate, provisional, and personal meaning of life: differences and common ground.  


Building on Viktor Frankl's clinical approach of Logotherapy and the works of subsequent theoreticians, three types of meaning of life were theoretically derived and empirically investigated, Ultimate, Provisional, and Personal meaning. These types were characterized, first, by the amount of agreement of subjects, second, by sources of Life Meaning, which were assessed by content analyses, third, by correlations, and fourth by prediction with ratings of important life concepts from the domains of Well-being, Religiosity, and Prosocial Behavior. 192 German adults, 45 men and 147 women, whose M age was 31.6 yr. (SD = 11.9), participated. Analysis indicated different sources for the Ultimate meaning compared with the other meaning types, which seem to display more similarities with each other. Other important life concepts, such as Belief, Harmony, Happiness, and Human Goodness were related to the investigated types of meaning of life. Some implications for clinical applications, research perspectives, and Positive Psychology are discussed. PMID:17037460

Auhagen, Ann Elisabeth; Holub, Franziska



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, FranÇois Guyot, Jean-Pascal Rueff, Viktor V. Struzhkin, György VankÓ, and Giulio Monaco. Science 300, 789 (2003), [2] James Badro, Jean-Pascal Rueff, György VankÓ, Giulio Monaco, Guillaume Fiquet, and FranÇois 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.



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.



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.


"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



Higher Order Geometric Effects and Profile Variation in a 3D Gyrokinetic Flux-Tube Simulation  

NASA Astrophysics Data System (ADS)

New results from a three-dimensional toroidal gyrokinetic flux tube simulation will be presented. The code utilizes a one dimensional domain decomposition(We thank Viktor Decyk, UCLA and Minh Tran, EPFL for use of the Fortran90 PLIB particle sorting routines.) in the direction along the field line (z=qR ?) and employs proper toroidal periodicity. No spectral decomposition is done in the z-direction. Instead, digital filtering is used in z, with the correct toroidal and poloidal periodicity. We will report the current performance and scaling on the SGI Origin 2000s at ACL, LANL and the T3Es at NERSC, LBNL. Preliminary results show better performance (by a factor of 2-5) than the T3E. Simulation results will show the effects of including higher order geometric corrections to the field-line-following approximation, such as radial temperature and density profile variation and radial variation of the B field, q, and q'. The sensitivity to initial conditions is currently being investigated, and will also be discussed. Finally, we will present detailed comparisons with global (whole plasma volume) simulations.

Kim, Charlson; Parker, Scott E.



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 Weizsäcker's theory of medicine. This goes far beyond Kant, embracing Schelling and Hegel philosophically. As it were, Jaspers and von Weizsäcker 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



Apparent discordant redshift QSO-galaxy associations  

NASA Astrophysics Data System (ADS)

An "exotic" idea proposed by Viktor Ambartsumian was that new galaxies are formed through the ejection from older active galaxies. Galaxies beget galaxies, instead of the standard scenario in which galaxies stem from the evolution of the seeds derived from fluctuations in the initial density field. This idea is in some way contained in the speculative proposal that some or all QSOs might be objects ejected by nearby galaxies, and that their redshift is not cosmological(Arp, G./M. Burbidge and others). I will discuss some of the arguments for and against this scenario; in particular, I shall talk about the existence of real physical connections in apparently discordant QSO-galaxy redshift associations. On the one hand, there are many statistical correlations of high-redshift QSOs and nearby galaxies that cannot yet be explained in terms of gravitational lensing, biases, or selection effects; and some particular configurations have very low probabilities of being a projection of background objects. Our understanding of QSOs in general is also far from complete. On the other hand, some cases which were claimed to be anomalous in the past have found an explanation in standard terms. As an example, I will show some cases of our own research into this type: statistics of ULXs around nearby galaxies, and the Flesch & Hardcastle candidate QSOs catalog analysis. My own conclusion is neutral.

Lopez-Corredoira, Martin



Up The Down Staircase  

NASA Astrophysics Data System (ADS)

The title of this presentation is taken from a well-known novel to emphasize that a renaissance in Soviet astronomy and space research took place after World War II under conditions of national tragedy. After a decade of political repression and war, the Soviet government had resolved that fundamental science should serve as a foundation for Communism, and this policy stimulated titanic new efforts that were intended to benefit Soviet science. Having been destroyed totally during the war, Pulkovo Observatory was rebuilt on its old foundation according to its original plan. The decision to rebuild Pulkovo can not be justified on scientific grounds, however, because of the proximity of a large city (Leningrad) and generally cloudy weather. Thus the rebuild- ing of Pulkovo in spite of the most difficult living conditions must be seen primarily as a great symbol. The Academy of Sciences of the Armenian Republic also was founded in the aftermath of World War II, and its president, Viktor Ambartsumian, introduced astronomy to Armenia with the construc- tion of Byurakan Observatory. (It is noteworthy that con- currently two leaders of republican academies were astronomers: Evgenii Kharadze, director of the Abastumani Observatory, in Georgia and Ambartsumian in Armenia.) In addition to Byurakan, several other large and well-equipped astronomical institutions were founded after the war--among them the Crimean Astrophysical Observatory and the Principal Astronomical Observatory of the Ukrainian Academy of Sciences near Kiev. As a natural consequence of this institution-building, the General Assembly of the IAU held its 1958 meeting in Moscow. Indeed, this meeting was the first large international scientific event in the Soviet Union following Stalin's death. At the time of the Assembly the Soviet government declared, as a counterpart to the launch of the first sputnik, its ambitious program to build the largest optical telescope in the world.

Gurshtein, A. A.



Coverage of Russian psychological contributions in American psychology textbooks.  


Internationalizing psychology is an important component of current globalization trends. American textbooks on the history of psychology and introductory psychology were surveyed for the presence of historical and contemporary important Russian psychologists to assess the current status of Russian-American crossfertilization. Of a list of 97 important Russian psychologists, as determined by the editors of the Russian journal Methodology and History in Psychology, less than 22% are mentioned in the reviewed texts. The most common names were Pavlov, Luria, and Vygotsky. As the internet is arguably the single most important factor affecting the increase of international communication and dissemination of knowledge, we also searched for these 97 names on various websites, most notably Wikipedia and Google. Forty-one internet sites contained some amount of biographical information about Russian psychologists. On Wikipedia, 14 Russian psychologists had articles documenting biographical information. We also developed a rubric to determine the amount of information available on the internet for these psychologists and compared Wikipedia's mean score with various other websites. Wikipedia pages on average had a significantly higher score than the rest of the internet. Recommendations to improve Russian coverage in America are provided and include: (1) developing pages on Wikipedia and other virtual venues highlighting Russian contributions, (2) soliciting articles for US journals from Russian psychologists, and (3) incorporating Russian contributions in introductory and historical textbooks. We provide a partial bibliography of Russian contributions that can be used by authors of such textbooks. We would like to thank Dr Viktor Fedorovich Petrenko and Dr Igor Nikolaevich Karitsky from the journal Methodology and History of Psychology for supplying the names of the Russian psychologists. We would also like to express our appreciation to Robert García for reviewing and editing an earlier version of this manuscript. PMID:22047002

Aleksandrova-Howell, Maria; Abramson, Charles I; Craig, David Philip Arthur



Gravothermal Star Clusters - Theory and Computer Modelling  

NASA Astrophysics Data System (ADS)

In the George Darwin lecture, delivered to the British Royal Astronomical Society in 1960 by Viktor A. Ambartsumian he wrote on the evolution of stellar systems that it can be described by the "dynamic evolution of a gravitating gas" complemented by "a statistical description of the changes in the physical states of stars". This talk will show how this physical concept has inspired theoretical modeling of star clusters in the following decades up to the present day. The application of principles of thermodynamics shows, as Ambartsumian argued in his 1960 lecture, that there is no stable state of equilibrium of a gravitating star cluster. The trend to local thermodynamic equilibrium is always disturbed by escaping stars (Ambartsumian), as well as by gravothermal and gravogyro instabilities, as it was detected later. Here the state-of-the-art of modeling the evolution of dense stellar systems based on principles of thermodynamics and statistical mechanics (Fokker-Planck approximation) will be reviewed. Recent progress including rotation and internal correlations (primordial binaries) is presented. The models have also very successfully been used to study dense star clusters around massive black holes in galactic nuclei and even (in a few cases) relativistic supermassive dense objects in centres of galaxies (here again briefly touching one of the many research fields of V.A. Ambartsumian). For the modern present time of high-speed supercomputing, where we are tackling direct N-body simulations of star clusters, we will show that such direct modeling supports and proves the concept of the statistical models based on the Fokker-Planck theory, and that both theoretical concepts and direct computer simulations are necessary to support each other and make scientific progress in the study of star cluster evolution.

Spurzem, Rainer



Ciliation and gene expression distinguish between node and posterior notochord in the mammalian embryo.  


The mammalian node, the functional equivalent of the frog dorsal blastoporal lip (Spemann's organizer), was originally described by Viktor Hensen in 1876 in the rabbit embryo as a mass of cells at the anterior end of the primitive streak. Today, the term "node" is commonly used to describe a bilaminar epithelial groove presenting itself as an indentation or "pit" at the distal tip of the mouse egg cylinder, and cilia on its ventral side are held responsible for molecular laterality (left-right) determination. We find that Hensen's node in the rabbit is devoid of cilia, and that ciliated cells are restricted to the notochordal plate, which emerges from the node rostrally. In a comparative approach, we use the organizer marker gene Goosecoid (Gsc) to show that a region of densely packed epithelium-like cells at the anterior end of the primitive streak represents the node in mouse and rabbit and is covered ventrally by a hypoblast (termed "visceral endoderm" in the mouse). Expression of Nodal, a gene intricately involved in the determination of vertebrate laterality, delineates the wide plate-like posterior segment of the notochord in the rabbit and mouse, which in the latter is represented by the indentation frequently termed "the node." Similarly characteristic ciliation and nodal expression exists in Xenopus neurula embryos in the gastrocoel roof plate (GRP), i.e., at the posterior end of the notochord anterior to the blastoporal lip. Our data suggest that (1) a posterior segment of the notochord, here termed PNC (for posterior notochord), is characterized by features known to be involved in laterality determination, (2) the GRP in Xenopus is equivalent to the mammalian PNC, and (3) the mammalian node as defined by organizer gene expression is devoid of cilia and most likely not directly involved in laterality determination. PMID:17316383

Blum, Martin; Andre, Philipp; Muders, Kerstin; Schweickert, Axel; Fischer, Anja; Bitzer, Eva; Bogusch, Susanne; Beyer, Tina; van Straaten, Henny W M; Viebahn, Christoph



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: Algebra, Geometry, and Mathematical Physics 2010  

NASA Astrophysics Data System (ADS)

This proceedings volume presents results obtained by the participants of the 6th Baltic-Nordic workshop 'Algebra, Geometry, and Mathematical Physics (AGMP-6)' held at the Sven Lovén Centre for Marine Sciences in Tjärnö, Sweden on October 25-30, 2010. The Baltic-Nordic Network AGMP 'Algebra, Geometry, and Mathematical Physics' was created in 2005 on the initiative of two Estonian universities and two Swedish universities: Tallinn University of Technology represented by Eugen Paal (coordinator of the network), Tartu University represented by Viktor Abramov, Lund University represented by Sergei Silvestrov, and Chalmers University of Technology and the University of Gothenburg represented by Alexander Stolin. The goal was to promote international and interdisciplinary cooperation between scientists and research groups in the countries of the Baltic-Nordic region in mathematics and mathematical physics, with special emphasis on the important role played by algebra and geometry in modern physics, engineering and technologies. The main activities of the AGMP network consist of a series of regular annual international workshops, conferences and research schools. The AGMP network also constitutes an important educational forum for scientific exchange and dissimilation of research results for PhD students and Postdocs. The network has expanded since its creation, and nowadays its activities extend beyond countries in the Baltic-Nordic region to universities in other European countries and participants from elsewhere in the world. As one of the important research-dissimilation outcomes of its activities, the network has a tradition of producing high-quality research proceedings volumes after network events, publishing them with various international publishers. The PDF also contains the following: List of AGMP workshops and other AGMP activities Main topics discussed at AGMP-6 Review of AGMP-6 proceedings Acknowledgments List of Conference Participants

Stolin, A.; Abramov, V.; Fuchs, J.; Paal, E.; Shestopalov, Y.; Silvestrov, S.



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



The origin of galactic cosmic rays  

NASA Astrophysics Data System (ADS)

One century ago Viktor Hess carried out several balloon flights that led him to conclude that the penetrating radiation responsible for the discharge of electroscopes was of extraterrestrial origin. One century from the discovery of this phenomenon seems to be a good time to stop and think about what we have understood about Cosmic Rays. The aim of this review is to illustrate the ideas that have been and are being explored in order to account for the observable quantities related to cosmic rays and to summarize the numerous new pieces of observation that are becoming available. In fact, despite the possible impression that development in this field is somewhat slow, the rate of new discoveries in the last decade or so has been impressive, and mainly driven by beautiful pieces of observation. At the same time scientists in this field have been able to propose new, fascinating ways to investigate particle acceleration inside the sources, making use of multifrequency observations that range from the radio, to the optical, to X-rays and gamma rays. These ideas can now be confronted with data. I will mostly focus on supernova remnants as the most plausible sources of Galactic cosmic rays, and I will review the main aspects of the modern theory of diffusive particle acceleration at supernova remnant shocks, with special attention for the dynamical reaction of accelerated particles on the shock and the phenomenon of magnetic field amplification at the shock. Cosmic-ray escape from the sources is discussed as a necessary step to determine the spectrum of cosmic rays at the Earth. The discussion of these theoretical ideas will always proceed parallel to an account of the data being collected especially in X-ray and gamma-ray astronomy. In the end of this review I will also discuss the phenomenon of cosmic-ray acceleration at shocks propagating in partially ionized media and the implications of this phenomenon in terms of width of the Balmer line emission. This field of research has recently experienced a remarkable growth, in that H? lines have been found to bear information on the cosmic-ray acceleration efficiency of supernova shocks.

Blasi, Pasquale




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.




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, Jülich 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



Time- and Space-Domain Measurements of the Thermal Conductivity in Diamond Anvil Cells  

NASA Astrophysics Data System (ADS)

I will give an overview of recent developments of experimental techniques to measure the thermal conductivity in diamond anvil cell (DAC) under conditions of high pressure and high temperature (P-T) which are relevant for the planetary interiors. To measure the lattice contributions to the thermal conductivity, we developed a transient heating technique (THT) in the diamond anvil cell (DAC) [1]. This technique utilizes a periodic front surface temperature variation (measured by the spectroradiometry) of a metallic absorber surrounded by the material of interest and exposed to a pulsed laser radiation (10 nanoseconds pulses). We extract the thermal diffusivity of minerals by fitting the experimental results to the model finite element (FE) calculations. We have recently modified this technique for microseconds laser pulses as this allows avoiding nonequilibrium heat transfer processes. We have measured the thermal conductivity of Ar up to 50 GPa and 2500 K; the results are in agreement with the theoretical calculations [2] in the limit of high temperatures. In collaboration with a group from the University of Illinois we have utilized a time-domain thermoreflectance (TDTR)- ultrafast (femtosecond) laser pump-probe technique for measurement of the lattice thermal conductivity at high P-T conditions. We have measured the thermal conductivity of MgO up to 60 GPa and 300 K and up to 45 GPa at 600 K. The detailed results of this study will be presented in a separate paper at this Meeting. Finally, we have combined static and pulsed laser techniques to determine the thermal conductivity of Fe and its temperature dependence at high pressures up to 70 GPa and 2000 K [3]. A thin plate of Fe was positioned in an Ar medium, laser heated from one side and the temperature is being measured from both sides of the sample radiometrically. The thermal conductivity has been determined by fitting the results of FE calculations to the experimental results. These examples demonstrate that different techniques can be successfully used to determine the thermal conductivity of materials loaded in the DAC. The choice of the technique depends on material properties, sample preparation method, and P-T range needed. I thank D. Allen Dalton, David Cahill, Viktor Struzhkin, Wen-Pin Hsieh, Zuzana Konopkova, Peter Lazor, Javier A. Montoya for critically contributing to this work. I acknowledge support from NSF EAR 0711358 and EAR-1015239, Carnegie Institution of Washington, DOE/ NNSA (CDAC), and EFree, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Award No. DESC0001057. 1. P. Beck, A. F. Goncharov, V. V. Struzhkin, B. Militzer, H. K. Mao, R. J. Hemley (2007). Measurement of thermal diffusivity at high pressure using a transient heating technique, Appl Phys. Lett. 91, 181914. 2. K. V. Tretiakov and S. Scandolo (2004). Thermal conductivity of solid argon at high pressure and high temperature: A molecular dynamics study. Journal of Chemical Physics 121, 11177-11182. 3. Z. Konopkova, P. Lazor, A. F. Goncharov, V. V. Struzhkin (2011). Thermal conductivity of hcp iron at high pressure and temperature, High Pressure Research, 31, 228-236.

Goncharov, A. F.



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)Å, ? = 91.54(8)°, ? = 98.29(8)°, ? = 105.65(8)°, V = 837.2(1.5) Å3, Z = 2. The strongest reflections in the X-ray powder pattern ( d, Å, - 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.



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 Pärna. 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 Nõmmiste Dr Marco Kirm Dr Toomas Plank The PDF also contains lists of the committees, the conference photograph and the sponsor's logos.

Nõmmiste, Ergo; Kirm, Marco; Plank, Toomas




NASA Astrophysics Data System (ADS)

The present issue of SERBIAN ASTRONOMICAL JOURNAL is the last one edited by the two of us. We resigned not because we were tired of our service to the astronomical community but due to the old tradition of the Belgrade Astronomical Observatory that its Director is automatically the Editor-in-Chief of its publications. We therefore gladly give the opportunity to the new Director, in charge since July 1st. 2002, to organize the publishing activity according to his conceptions. One of us (M.S.D.) was appointed Editor on January 1st. 1984 (from No. 135), becoming the Editor-in-Chief in 1987 (from No. 137). The other one (L.C.P.) is the Editor since 1994 (from No. 150). During this period the Bulletin de l'Observatoire Astronomique de Belgrade merged with the Publications of the Department of Astronomy, changing its name into Bulletin Astronomique de Belgrade from No. 145 in 1992, to finally become Serbian Astronomical Journal in 1998, from No. 157. Accordingly, of a "Bulletin" we made a "Journal". For example, in the period 1971-1984 (Nos. 125-134) in Bull. Obs. Astron. Belgrade, practically only the associates of the Belgade Observatory published their papers, save for a few individuals from the Belgrade University. We found within this period the name of one sole foreign astronomer - from the USSR - namely V. A. Fomin, among the authors. In the period 1985-2002 in the Serbian Astronomical Journal published their communications not only astronomers from Yugoslavia but also from Belgium, China, France, Italy, Moldova, Romania, Russia, Spain, Ukraine, USA. Our authors from outside of Yugoslavia are: J. P. Anosova C. Beuyninx Cristina Blaga Paul A. Blaga Veronique Bommier N. M. Bronnikov Alberto Celino Pierre Cugnon D. R. Davis Henry Debehogne Veronique Dehant P. Farinella Alex Gaina R. I. Gumerov R. S. Izmailov V. B. Kapkov F. F. Khalikhevich S. A. Kilioner Tatiana R. Kirian N. G. Litkevich Evencio G. Mediavilla O. Mihai Andrea Milani Vasile Mioc Jose A. Munoz Viktor V. Orlov Paolo Paolicchi Paul Paquet Genadij I. Pinigin Sylvie Sahal-Brechot Dan Selaru N. D. Simonenko Eduardo Simonneau A. Shul'ga Magdalena Stavinschi Cristina Stoica T. I. Suchkova Emil Tatomir Svetlana A. Tolchelnikova-Muri V. I. Turenkov Margarita Yu. Volyanskaya A. Yu. Yacenko Vincento Zappala G. Zhen-Nian We are grateful to these authors for having chosen our journal, thereby conferring on the Serbian Astronomical Journal an international standing. This is also a suitable opportunity to thank the numerous referees who contributed to our Journal being better. During this period the referees officially registered (a number of them, mainly belonging to the editorial boards, remain unregistered) have been (in Brackets is the number of papers they reviewed): Trajko Angelov (11) Jelisaveta Arsenijevic (4) Olga Atanackovic-Vukmanovic (4) Milutin Blagojevic (1) Markyan S. Chubey (1) B. Ciric (2) Miodrag Dacic (2) Milan S. Dimitrijevic (43) Gojko Djurasevic (1) B. Djuric (1) Dragutin Djurovic (5) Stevica Djurovic (3) Petar Grujic (5) Slobodan Jankov (1) Zoran Knezevic (7) Nikola Konjevic (6) Vladimir Krsljanin (2) Aleksandar Kubicela (12) Mike Kuzmanoski (10) Jaroslav Labat (1) Jovan Lazovic (1) Ilija Lukacevic (5) Jovan Malisic (1) Milan Mijatov (1) Jelena Milogradov-Turin (2) Vladeta Milovanovic (6) Ljubisa Mitic (22) Radovan Mrkic (1) Ranko Muzijevic (4) Slobodan Ninkovic (30) Dragomir Olevic (3) Nada Pejovic (1) Georgije Popovic (18) Luka C. Popovic (12) Sofija Sadzakov (28) Jovan Simovljevic (7) Nicholas Spyrou (1) Bozidar Stanic (1) Miroljub Starcevic (1) S. Starcevic (1) Magdalena Stavinschi (1) Dragoljub Stefanovic (1) Dusan Saletic (9) Stevo Segan (1) Branislav Sevarlic (16) Djordje Teleki (10) Istvan Vince (42) Mirjana Vukicevic-Karabin (1) Vincento Zappala (1) Danilo Zulevic (2) In our register, in which M.S.D. began entering the submitted articles from January 1st, 1984, up to now, 455 of them are inscribed. A part of them has been published in Publications of the Astronomical Observatory of Belgrade, only 24 of them having been tur

Dimitrijevic, M. S.; Popovic, L. C.