Science.gov

Sample records for andrzej bernacki tomasz

  1. Andrzej PȨKALSKI Networks of Scientific Interests with Internal Degrees of Freedom Through Self-Citation Analysis

    NASA Astrophysics Data System (ADS)

    Ausloos, M.; Lambiotte, R.; Scharnhorst, A.; Hellsten, I.

    Old and recent theoretical works by Andrzej Pȩkalski (APE) are recalled as possible sources of interest for describing network formation and clustering in complex (scientific) communities, through self-organization and percolation processes. Emphasis is placed on APE self-citation network over four decades. The method is that used for detecting scientists' field mobility by focusing on author's self-citation, co-authorships and article topics networks as in Refs. 1 and 2. It is shown that APE's self-citation patterns reveal important information on APE interest for research topics over time as well as APE engagement on different scientific topics and in different networks of collaboration. Its interesting complexity results from "degrees of freedom" and external fields leading to so called internal shock resistance. It is found that APE network of scientific interests belongs to independent clusters and occurs through rare or drastic events as in irreversible "preferential attachment processes", similar to those found in usual mechanics and thermodynamics phase transitions.

  2. Committees and organizers

    NASA Astrophysics Data System (ADS)

    2011-07-01

    Chairman:Jozef Spałek (Kraków) Program Committee:Stephen Blundell (Oxford), J Michael D Coey (Dublin), Dominique Givord (Grenoble), Dariusz Kaczorowski (Wrocław), Roman Micnas (Poznań), Marek Przybylski (Halle), Ludiwig Schultz (Dresden), Vladimir Sechovsky (Prague), Jozef Spałek (Kraków), Henryk Szymczak (Warszawa), Manuel Vázquez (Madrid) Publication Committee:Dariusz Kaczorowski, Robert Podsiadły, Jozef Spałek, Henryk Szymczak, Andrzej Szytuła Local committee:Maria Bałanda, Anna Majcher, Robert Podsiadły, Michał Rams, Andrzej Ślebarski, Krzysztof Tomala Editors of the Proceedings:Jozef Spałek, Krzysztof Tomala, Danuta Goc-Jagło, Robert Podsiadły, Michał Rams, Anna Majcher Plenary, semi-plenary and tutorial speakers:Ernst Bauer (Wien)Stephen Blundell (Oxford)J Michael D Coey (Dublin)Russell P Cowburn (London)Burkard Hillebrands (Kaiserslautern)Claudine Lacroix (Grenoble)Lluís Mañosa (Barcelona)María del Carmen Muñoz (Madrid)Bernard Raveau (Caen)Pedro Schlottmann (Tallahassee)Frank Steglich (Dresden)Oliver Waldmann (Freiburg) Invited speakers within symposia: R Ahuja (Uppsala)A Kirilyuk (Nijmegen) M Albrecht (Vienna)L Theil Kuhn (Roskilde) K Bärner (Göttingen)J Liu (Dresden) U Bovensiepen (Duisburg)G Lorusso (Modena) V Buchelnikov (Chelyabinsk)M M Maska (Katowice) B Chevalier (Bordeaux)Y Mukovskii (Moscow) O Chubykalo-Fesenko (Madrid)M Pannetier-Lecoeur (Saclay) A V Chumak (Kaiserslautern)G Papavassiliou (Athens) J M D Coey (Dublin)K R Pirota (Campinas) B Dabrowski (DeKalb)P Przyslupski (Warszawa) S Das (Aveiro)M Reiffers (Košice) A del Moral (Zaragoza)K Sandeman (London) V E Demidov (Muenster)D Sander (Halle) B Djafari-Rouhani (Lille)M Sawicki (Sendai/Warsaw) H A Dürr (Menlo Park)J Schaefer (Würzburg) J Fassbender (Dresden)H Schmidt (Wetzikon) J Fontcuberta (Barcelona)J Spałek (Kraków) V Garcia (Orsay)L Straka (Helsinki) J N Gonçalves (Aveiro)A Szewczyk (Warszawa) M E Gruner (Duisburg)Y Taguchi (Wako) G Gubbiotti (Perugia)A Thiaville

  3. Structural Biology Reveals the Secrets of Disease

    SciTech Connect

    Joachmiak, Andrzej

    2012-01-01

    Argonne's Structural Biology Center Director, Andrzej Joachimiak, talks about the work done at the SBC in analyzes the genetic makeup of pathogens to better understand how harmful bacteria and viruses can affect humans and animals.

  4. Papers and Studies in Contrastive Linguistics. Vol. 6. The Polish-English Contrastive Project.

    ERIC Educational Resources Information Center

    Fisiak, Jacek

    This volume of contrastive studies of English and Polish includes the following papers: (1) "Contrastive Analysis in a New Dimension," by Tomasz P. Krzeszowski; (2) "On the Feasibility of Pedagogical Contrastive Sociolinguistics," by Karol Janicki; (3) "The Lexicon and Contrastive Language Studies," by Miroslaw Nowakowski; (4) "Variation and…

  5. Papers and Studies in Contrastive Linguistics, Volume Twenty-One.

    ERIC Educational Resources Information Center

    Fisiak, Jacek, Ed.

    A collection of papers on contrastive linguistics includes: "Prototypes and Equivalence" (Tomasz P. Krzeszowski); "Comparing the Incomparable? English Adjectives in "-able" and Their Rendering in Modern Chinese" (Arthur Mettinger); "Classification and Distribution of Lexical Errors in the Written Work of German Learners of English" (Rudiger…

  6. Great figures of Polish Nephrology - Participants of the Warsaw Uprising 1944.

    PubMed

    Muszytowski, M; Ostrowski, J; Rutkowski, B

    2016-02-01

    In 1944, during the World War II, many doctors and many medical students participated in the Warsaw Uprising. This group also comprised future nephrologists, professors of medicine, founders of Polish nephrology, dialysis and transplantology centers. We presented 3 of great polish nephrologists who participated in medical services in the Warsaw Uprising: Zygmunt Hanicki, Andrzej Manitius and Tadeusz Orłowski. PMID:26913890

  7. Studying Russian and Soviet History.

    ERIC Educational Resources Information Center

    Ascher, Abraham, Ed.

    These essays were written to assist teachers in the task of making Russian history intelligible to young U.S. students. In "An Approach to Russian History," Edward Keenan proposes that students need to gain a better understanding of how Russians perceive themselves and their history. In "Pre-Petrine Russia," Andrzej S. Kaminski focuses on the…

  8. Predicting Treatment Effect from Surrogate Endpoints and Historical Trials | Division of Cancer Prevention

    Cancer.gov

    By Stuart G. Baker (wrote software), Daniel J. Sargent, Marc Buyse, and Tomasz Burzykowski The key function is Surr[data] where data={data1x,data2x,data3x,...} datax={x,infovec} x = matrix of counts:rows are trialscolumns are cells (000,001,010,011,100,101,110,111) infovec={control,name0,name1,surrtime,truetime,units,datatype} |

  9. Sampling errors in free energy simulations of small molecules in lipid bilayers.

    PubMed

    Neale, Chris; Pomès, Régis

    2016-10-01

    Free energy simulations are a powerful tool for evaluating the interactions of molecular solutes with lipid bilayers as mimetics of cellular membranes. However, these simulations are frequently hindered by systematic sampling errors. This review highlights recent progress in computing free energy profiles for inserting molecular solutes into lipid bilayers. Particular emphasis is placed on a systematic analysis of the free energy profiles, identifying the sources of sampling errors that reduce computational efficiency, and highlighting methodological advances that may alleviate sampling deficiencies. This article is part of a Special Issue entitled: Biosimulations edited by Ilpo Vattulainen and Tomasz Róg. PMID:26952019

  10. Republication of: The geometry of free fall and light propagation

    NASA Astrophysics Data System (ADS)

    Ehlers, Jürgen; Pirani, Felix A. E.; Schild, Alfred

    2012-06-01

    This is a reprinting of the paper by Jürgen Ehlers, Felix Pirani and Alfred Schild, first published in 1972 in a separate volume containing articles written in hounour of J. L. Synge. The original book is long out of print and almost forgotten by today. The authors present a method of deriving the Lorentzian geometry from compatible conformal and projective structures on a four dimensional manifold. The paper has been selected by the Editors of General Relativity and Gravitation for re-publication in the Golden Oldies series of the journal. This republication is accompanied by an editorial note written by Andrzej Trautman.

  11. Republication of: Relativistic cosmology

    NASA Astrophysics Data System (ADS)

    Robertson, H. P.

    2012-08-01

    This is a reprinting of the paper by Howard Percy Robertson, first published in 1933 in Rev. Mod. Phys., that is a very authoritative summary of relativistic cosmology at the stage at which it was up to 1933. The paper has been selected by the Editors of General Relativity and Gravitation for re-publication in the Golden Oldies series of the journal. This republication is accompanied by an editorial note written by George Ellis, and by Robertson's biography, compiled by Andrzej Krasinski from printed sources.

  12. [Diseases and death of Joseph Pilsudski].

    PubMed

    Jeśman, Czesław; Młudzik, Agnieszka; Kula, Agnieszka

    2012-06-01

    Marshal Joseph Pilsudski did not belong to individuals who cared for their health. He avoided physicians and treatment. He appreciated only legion physicians such as Gen. Dr Stanisław Ruppert, Col. Dr Marcin Wroczyński and Col. DrAndrzej Mozołowki. Joseph Pilsudski was a heavy smoker and suffered from pulmonary emphysema for many years. In 1933 he caught a severe flu accompanied by some hepatic ailments and began losing his weight. In 1935, his liver became enlarged. He started vomiting and was very weak. All consultations were ineffective. He died from primary carcinoma of bile ducts on 12 May, 1935. PMID:22891570

  13. EDITORIAL: Microwave Moisture Measurements

    NASA Astrophysics Data System (ADS)

    Kaatze, Udo; Kupfer, Klaus; Hübner, Christof

    2007-04-01

    Microwave moisture measurements refer to a methodology by which the water content of materials is non-invasively determined using electromagnetic fields of radio and microwave frequencies. Being the omnipresent liquid on our planet, water occurs as a component in most materials and often exercises a significant influence on their properties. Precise measurements of the water content are thus extremely useful in pure sciences, particularly in biochemistry and biophysics. They are likewise important in many agricultural, technical and industrial fields. Applications are broad and diverse, and include the quality assessment of foodstuffs, the determination of water content in paper, cardboard and textile production, the monitoring of moisture in sands, gravels, soils and constructions, as well as the measurement of water admixtures to coal and crude oil in reservoirs and in pipelines. Microwave moisture measurements and evaluations require insights in various disciplines, such as materials science, dielectrics, the physical chemistry of water, electrodynamics and microwave techniques. The cooperation of experts from the different fields of science is thus necessary for the efficient development of this complex discipline. In order to advance cooperation the Workshop on Electromagnetic Wave Interaction with Water and Moist Substances was held in 1993 in Atlanta. It initiated a series of international conferences, of which the last one was held in 2005 in Weimar. The meeting brought together 130 scientists and engineers from all over the world. This special issue presents a collection of some selected papers that were given at the event. The papers cover most topics of the conference, featuring dielectric properties of aqueous materials, electromagnetic wave interactions, measurement methods and sensors, and various applications. The special issue is dedicated to Dr Andrzej W Kraszewski, who died in July 2006 after a distinguished career of 48 years in the research of

  14. Functionalized lipids and surfactants for specific applications.

    PubMed

    Kepczynski, Mariusz; Róg, Tomasz

    2016-10-01

    Synthetic lipids and surfactants that do not exist in biological systems have been used for the last few decades in both basic and applied science. The most notable applications for synthetic lipids and surfactants are drug delivery, gene transfection, as reporting molecules, and as support for structural lipid biology. In this review, we describe the potential of the synergistic combination of computational and experimental methodologies to study the behavior of synthetic lipids and surfactants embedded in lipid membranes and liposomes. We focused on select cases in which molecular dynamics simulations were used to complement experimental studies aiming to understand the structure and properties of new compounds at the atomistic level. We also describe cases in which molecular dynamics simulations were used to design new synthetic lipids and surfactants, as well as emerging fields for the application of these compounds. This article is part of a Special Issue entitled: Biosimulations edited by Ilpo Vattulainen and Tomasz Róg. PMID:26946243

  15. Role of charged lipids in membrane structures - Insight given by simulations.

    PubMed

    Pöyry, Sanja; Vattulainen, Ilpo

    2016-10-01

    Lipids and proteins are the main components of cell membranes. It is becoming increasingly clear that lipids, in addition to providing an environment for proteins to work in, are in many cases also able to modulate the structure and function of those proteins. Particularly charged lipids such as phosphatidylinositols and phosphatidylserines are involved in several examples of such effects. Molecular dynamics simulations have proved an invaluable tool in exploring these aspects. This so-called computational microscope can provide both complementing explanations for the experimental results and guide experiments to fruitful directions. In this paper, we review studies that have utilized molecular dynamics simulations to unravel the roles of charged lipids in membrane structures. We focus on lipids as active constituents of the membranes, affecting both general membrane properties as well as non-lipid membrane components, mainly proteins. This article is part of a Special Issue entitled: Biosimulations edited by Ilpo Vattulainen and Tomasz Róg. PMID:27003126

  16. The good, the bad and the user in soft matter simulations.

    PubMed

    Wong-Ekkabut, Jirasak; Karttunen, Mikko

    2016-10-01

    Molecular dynamics (MD) simulations have become popular in materials science, biochemistry, biophysics and several other fields. Improvements in computational resources, in quality of force field parameters and algorithms have yielded significant improvements in performance and reliability. On the other hand, no method of research is error free. In this review, we discuss a few examples of errors and artifacts due to various sources and discuss how to avoid them. Besides bringing attention to artifacts and proper practices in simulations, we also aim to provide the reader with a starting point to explore these issues further. In particular, we hope that the discussion encourages researchers to check software, parameters, protocols and, most importantly, their own practices in order to minimize the possibility of errors. The focus here is on practical issues. This article is part of a Special Issue entitled: Biosimulations edited by Ilpo Vattulainen and Tomasz Róg. PMID:26862882

  17. Force Field Development for Lipid Membrane Simulations.

    PubMed

    Lyubartsev, Alexander P; Rabinovich, Alexander L

    2016-10-01

    With the rapid development of computer power and wide availability of modelling software computer simulations of realistic models of lipid membranes, including their interactions with various molecular species, polypeptides and membrane proteins have become feasible for many research groups. The crucial issue of the reliability of such simulations is the quality of the force field, and many efforts, especially in the latest several years, have been devoted to parametrization and optimization of the force fields for biomembrane modelling. In this review, we give account of the recent development in this area, covering different classes of force fields, principles of the force field parametrization, comparison of the force fields, and their experimental validation. This article is part of a Special Issue entitled: Biosimulations edited by Ilpo Vattulainen and Tomasz Róg. PMID:26766518

  18. Gold nanoparticles in model biological membranes: A computational perspective.

    PubMed

    Rossi, Giulia; Monticelli, Luca

    2016-10-01

    The electronic, optical, catalytic, and magnetic properties of metal nanoparticles (NPs) make them extremely interesting for biomedical applications. In this rapidly moving field, monolayer-protected gold nanoparticles emerge both as a reference system and as promising candidates for drug and gene delivery, photothermal treatment, and imaging applications. Despite the technological relevance, there is still poor understanding of the molecular processes driving the interactions of metal nanoparticles with cells, and with cell membranes in particular. In this paper we review molecular-level computational studies of the interaction between monolayer-protected gold NPs and model lipid membranes. Our review comprises a brief description of the most relevant experimental results in this field and of the questions they raised, followed by a description of the computational achievements reported so far. This article is part of a Special Issue entitled: Biosimulations edited by Ilpo Vattulainen and Tomasz Róg. PMID:27060434

  19. Computer simulations of lung surfactant.

    PubMed

    Baoukina, Svetlana; Tieleman, D Peter

    2016-10-01

    Lung surfactant lines the gas-exchange interface in the lungs and reduces the surface tension, which is necessary for breathing. Lung surfactant consists mainly of lipids with a small amount of proteins and forms a monolayer at the air-water interface connected to bilayer reservoirs. Lung surfactant function involves transfer of material between the monolayer and bilayers during the breathing cycle. Lipids and proteins are organized laterally in the monolayer; selected species are possibly preferentially transferred to bilayers. The complex 3D structure of lung surfactant and the exact roles of lipid organization and proteins remain important goals for research. We review recent simulation studies on the properties of lipid monolayers, monolayers with phase coexistence, monolayer-bilayer transformations, lipid-protein interactions, and effects of nanoparticles on lung surfactant. This article is part of a Special Issue entitled: Biosimulations edited by Ilpo Vattulainen and Tomasz Róg. PMID:26922885

  20. Cell membranes: A subjective perspective.

    PubMed

    Simons, Kai

    2016-10-01

    Cell membranes have developed a tremendous complexity of lipids and proteins geared to perform the functions cells require. The lipids have for long remained in the background and are now regaining their role as important building blocks of cells. Their main function is to form the matrix of our cell membranes where they support a variety of functions essential for life. This 2-dimensional fluid matrix has evolved unexpected material properties that involve both lipid-lipid and lipid-protein interactions. This perspective is a short summary of the challenges that this field faces and discusses potential ways and means for coming to grips with the properties of this incredible fluid. This article is part of a Special Issue entitled: Biosimulations edited by Ilpo Vattulainen and Tomasz Róg. PMID:26827711

  1. Teichoic acid-containing muropeptides from Streptococcus pneumoniae as substrates for the pneumococcal autolysin.

    PubMed Central

    Garcia-Bustos, J F; Tomasz, A

    1987-01-01

    Pneumococcal cell walls in which the normal phosphorylcholine component of the wall teichoic acids is replaced with phosphorylethanolamine cannot absorb the homologous autolytic enzyme and are completely resistant to autolytic degradation (S. Giudicelli and A. Tomasz, J. Bacteriol. 158:1188-1190, 1984). We have now isolated and characterized soluble teichoic acid-containing muropeptides from such cell walls and tested them as substrates for the pneumococcal autolytic enzyme. Both choline- and ethanolamine-containing muropeptides were hydrolyzed to the same extent by the enzyme. Furthermore, free choline concentrations that totally inhibited the digestion of pneumococcal cell walls in vivo and in vitro were without effect when the soluble substrates were used. PMID:2879828

  2. Lipid interaction sites on channels, transporters and receptors: Recent insights from molecular dynamics simulations.

    PubMed

    Hedger, George; Sansom, Mark S P

    2016-10-01

    Lipid molecules are able to selectively interact with specific sites on integral membrane proteins, and modulate their structure and function. Identification and characterization of these sites are of importance for our understanding of the molecular basis of membrane protein function and stability, and may facilitate the design of lipid-like drug molecules. Molecular dynamics simulations provide a powerful tool for the identification of these sites, complementing advances in membrane protein structural biology and biophysics. We describe recent notable biomolecular simulation studies which have identified lipid interaction sites on a range of different membrane proteins. The sites identified in these simulation studies agree well with those identified by complementary experimental techniques. This demonstrates the power of the molecular dynamics approach in the prediction and characterization of lipid interaction sites on integral membrane proteins. This article is part of a Special Issue entitled: Biosimulations edited by Ilpo Vattulainen and Tomasz Róg. PMID:26946244

  3. Permeability across lipid membranes.

    PubMed

    Shinoda, Wataru

    2016-10-01

    Molecular permeation through lipid membranes is a fundamental biological process that is important for small neutral molecules and drug molecules. Precise characterization of free energy surface and diffusion coefficients along the permeation pathway is required in order to predict molecular permeability and elucidate the molecular mechanisms of permeation. Several recent technical developments, including improved molecular models and efficient sampling schemes, are illustrated in this review. For larger penetrants, explicit consideration of multiple collective variables, including orientational, conformational degrees of freedom, are required to be considered in addition to the distance from the membrane center along the membrane normal. Although computationally demanding, this method can provide significant insights into the molecular mechanisms of permeation for molecules of medical and pharmaceutical importance. This article is part of a Special Issue entitled: Biosimulations edited by Ilpo Vattulainen and Tomasz Róg. PMID:27085977

  4. PREFACE: Conference Committee

    NASA Astrophysics Data System (ADS)

    2016-02-01

    ORGANISING COMMITTEE: Alexander Petrov - Chairman, Kiril Blagoev - Vice-Chairman, Margarita Grozeva - Scientific secretary, Kostadinka Gesheva, Anna Szekeres, Hassan Chamati, Diana Nesheva, Peter Rafailov, Yordan Marinov, Emilia Dimova, Tatyana Ivanova, Radostina Kamburova, Ekaterina Iordanova, Julia Genova, Alexander Donkov, Emilia Vlaikova SCIENTIFIC COMMITTEE: Alexander Petrov, Bulgaria; Nikola Sabotinov, Bulgaria; Kiril Blagoev, Bulgaria; Nicholay Tonchev, Bulgaria; Hassan Chamati, Bulgaria; Marin Gospodinov, Bulgaria; Peter Rafailov, Bulgaria; Emil Vlakhov, Bulgaria; Kostadinka Gesheva, Bulgaria; Anna Szekeres, Bulgaria; Diana Nesheva, Bulgaria; Albena Paskaleva, Bulgaria; Tatyana Ivanova, Bulgaria; Alexander Dreischuh, Bulgaria; Evgenia Valcheva, Bulgaria; Miglena Nikolaeva-Dimitrova, Bulgaria; Sanka Gateva, Bulgaria; Frank Hamelmann, Germany; Nicola Scaramuzza, Italy; G.M.W. Kroesen, Netherlands; Jan van Dijk Netherlands; Andrzej Szewczyk, Poland; Henryk Szymczak, Poland; Krzistof Rogacki, Poland; Ion Mihailescu, Romania; Claes-Goran Granqvist, Sweden; Mikael Jonsson, Sweden; Andrew Livingston, UK; Ludmila Peeva, UK

  5. Meeting report for "OddPols" 2014: the odds invite an even.

    PubMed

    Roy-Engel, Astrid M

    2015-02-01

    The Ninth International Biennial Conference on RNA Polymerases I and III (the "OddPols") was held on June 19-21, 2014 at the University of Michigan, Ann Arbor, USA. Sponsored by New England Biolabs, the Cayman Chemical Company, the Rackham Graduate School and the University of Michigan Health System, and organized by David Engelke, Craig Pikaard, Lawrence Rothblum, Andrzej Wierzbicki and Astrid Engel. This year at the conference, the "odds" were increased by expanding the usual topics on the advances in RNA polymerases I and III research to include presentations on RNA polymerase IV and V. The keynote speaker, Craig Pikaard, opened the meeting with his presentation entitled "Five nuclear multisubunit RNA polymerases". The meeting drew attendees from fourteen countries that shared their research discoveries through oral and poster presentations. The talks were organized into 11 sessions covering seven distinct topics. Here we present some of the highlights from the meeting using summaries provided by the participants. PMID:25445280

  6. PREFACE: Joint European Magnetic Symposia - JEMS 2010

    NASA Astrophysics Data System (ADS)

    Spałek, Jozef

    2011-07-01

    łekChairman of JEMS 2010 Symposia 1. Plenary, Semi-plenary, Tutorials 2. Magnetization Processes Spin Excitations and Ultrafast DynamicsCoordinator: Andrzej Maziewski (Bialystok) 3. Hard Magnetic Materials and MagnetocaloricsCoordinator: Henryk Figiel (Kraków) 4. Magnetic HydridesCoordinators: Ladislav Havela (Praha), Zbigniew Tarnawski (Kraków) 5. Interface of Magnetic Thin FilmsCoordinators: Jürgen Fassbender (Dresden), N-T H Kim-Ngan (Kraków) 6. Magnonic CrystalsCoordinators: Bahram Djafari-Rouhani (Lille), Henryk Puszkarski (Poznan) 7. Magnetism of Metals, Alloys, and IntermetallicsCoordinator: Andrzej Szytula (Kraków) 8. Molecular MagnetismCoordinators: Stephen Blundell (Oxford), Maria Balanda (Kraków) 9. Magnetooptics of NanomagnetsCoordinators: Kamil Postava (Ostrava), Marek Kisielewski (Bialystok) 10. NanomagnetismCoordinators: Marek Przybylski (Halle), Jürgen Kirschner (Halle) 11. Other topics - Biomagnetism, Domain Walls, InstrumentationCoordinator: Henryk Figiel (Kraków) 12. Magnetic Perovskites and MultiferroicsCoordinator: Henryk Szymczak (Warszawa) 13. Magnetic Semiconductors and InsulatorsCoordinators: Klaus Baerner (Göttingen), Tadeusz Gron (Katowice) 14. Magnetic Shape Memory Effects and Related PhenomenaCoordinators: Oliver Gutfleisch (Dresden), Sebastian Fähler (Dresden) 15. Soft Magnetic MaterialsCoordinators: Julian González (San Sebastian), Krzysztof Kulakowski (Kraków) 16. SpintronicsCoordinator: Maciej Sawicki (Warszawa) 17. Strongly Correlated Electron Systems, Magnetism and SuperconductivityCoordinator: Andrzej Slebarski (Katowice) The next Joint European Magnetic Symposia, JEMS 2012, will be held in Parma, Italy, 9-14 September 2012.www.jems2012.itCo-Chairs:Franca Albertini, Institute of Materials for Electronics and Magnetism (IMEM), CNR, ParmaRoberto De Renzi, Department of Physics, University of Parma

  7. Membrane pore formation in atomistic and coarse-grained simulations.

    PubMed

    Kirsch, Sonja A; Böckmann, Rainer A

    2016-10-01

    Biological cells and their organelles are protected by ultra thin membranes. These membranes accomplish a broad variety of important tasks like separating the cell content from the outer environment, they are the site for cell-cell interactions and many enzymatic reactions, and control the in- and efflux of metabolites. For certain physiological functions e.g. in the fusion of membranes and also in a number of biotechnological applications like gene transfection the membrane integrity needs to be compromised to allow for instance for the exchange of polar molecules across the membrane barrier. Mechanisms enabling the transport of molecules across the membrane involve membrane proteins that form specific pores or act as transporters, but also so-called lipid pores induced by external fields, stress, or peptides. Recent progress in the simulation field enabled to closely mimic pore formation as supposed to occur in vivo or in vitro. Here, we review different simulation-based approaches in the study of membrane pores with a focus on lipid pore properties such as their size and energetics, poration mechanisms based on the application of external fields, charge imbalances, or surface tension, and on pores that are induced by small molecules, peptides, and lipids. This article is part of a Special Issue entitled: Biosimulations edited by Ilpo Vattulainen and Tomasz Róg. PMID:26748016

  8. A molecular insight into the electro-transfer of small molecules through electropores driven by electric fields.

    PubMed

    Casciola, Maura; Tarek, Mounir

    2016-10-01

    The transport of chemical compounds across the plasma membrane into the cell is relevant for several biological and medical applications. One of the most efficient techniques to enhance this uptake is reversible electroporation. Nevertheless, the detailed molecular mechanism of transport of chemical species (dyes, drugs, genetic materials, …) following the application of electric pulses is not yet fully elucidated. In the past decade, molecular dynamics (MD) simulations have been conducted to model the effect of pulsed electric fields on membranes, describing several aspects of this phenomenon. Here, we first present a comprehensive review of the results obtained so far modeling the electroporation of lipid membranes, then we extend these findings to study the electrotransfer across lipid bilayers subject to microsecond pulsed electric fields of Tat11, a small hydrophilic charged peptide, and of siRNA. We use in particular a MD simulation protocol that allows to characterize the transport of charged species through stable pores. Unexpectedly, our results show that for an electroporated bilayer subject to transmembrane voltages in the order of 500mV, i.e. consistent with experimental conditions, both Tat11 and siRNA can translocate through nanoelectropores within tens of ns. We discuss these results in comparison to experiments in order to rationalize the mechanism of drug uptake by cells. This article is part of a Special Issue entitled: Biosimulations edited by Ilpo Vattulainen and Tomasz Róg. PMID:27018309

  9. Computer modelling studies of the bilayer/water interface.

    PubMed

    Pasenkiewicz-Gierula, Marta; Baczynski, Krzysztof; Markiewicz, Michal; Murzyn, Krzysztof

    2016-10-01

    This review summarises high resolution studies on the interface of lamellar lipid bilayers composed of the most typical lipid molecules which constitute the lipid matrix of biomembranes. The presented results were obtained predominantly by computer modelling methods. Whenever possible, the results were compared with experimental results obtained for similar systems. The first and main section of the review is concerned with the bilayer-water interface and is divided into four subsections. The first describes the simplest case, where the interface consists only of lipid head groups and water molecules and focuses on interactions between the lipid heads and water molecules; the second describes the interface containing also mono- and divalent ions and concentrates on lipid-ion interactions; the third describes direct inter-lipid interactions. These three subsections are followed by a discussion on the network of direct and indirect inter-lipid interactions at the bilayer interface. The second section summarises recent computer simulation studies on the interactions of antibacterial membrane active compounds with various models of the bacterial outer membrane. This article is part of a Special Issue entitled: Biosimulations edited by Ilpo Vattulainen and Tomasz Róg. PMID:26825705

  10. Potencjał turystyczny Roztocza Tomaszowskiego na przykładzie gminy miejsko-wiejskiej Krasnobród

    NASA Astrophysics Data System (ADS)

    Brzezińska-Wójcik, Teresa; Skowronek, Ewa

    2009-01-01

    The urban-rural commune of Krasnobród, situated in the central part of Tomaszów Roztocze, ranks among the top seven communes in the Lublin Province with regard to the volume of tourist traffic. It is also the most dynamically developing tourist area in Roztocze. Features of the natural environment, including its therapeutic properties, historical and cultural determinants and the state of tourist infrastructure constitute the most significant internal factors determining the intensity of tourism-related phenomena in the commune. The most important external factor is the commune's location within the Krasnobród Landscape Park and in the vicinity of the Roztocze National Park. An analysis of the determinants of tourism development in the commune revealed a wide range of forms of tourism, most notably recreational, wellness, adventure, sightseeing and religious tourism. The structure of the tourism potential of the town and commune of Krasnobród was analysed, enabling the identification of its strengths and weaknesses as well as the opportunities and threats to the development of tourism. The results achieved may prove helpful in adjusting the commune's tourist offer to the needs of a specific customers, diversifying the tourist offer, determining a suitable direction of the development of tourism in the commune and minimising conflicts between tourism and the natural environment.

  11. Tear film lipid layer: A molecular level view.

    PubMed

    Cwiklik, Lukasz

    2016-10-01

    Human cornea is covered by an aqueous tear film, and the outermost layer of the tear film is coated by lipids. This so-called tear film lipid layer (TFLL) reduces surface tension of the tear film and helps with the film re-spreading after blinks. Alterations of tear lipids composition and properties are related to dry eye syndrome. Therefore, unveiling structural and functional properties of TFLL is necessary for understanding tear film function under both normal and pathological conditions. Key properties of TFLL, such as resistance against high lateral pressures and ability to spread at the tear film surface, are directly related to the chemical identity of TFLL lipids. Hence, a molecular-level description is required to get better insight into TFLL properties. Molecular dynamics simulations are particularly well suited for this task and they were recently used for investigating TFLL. The present review discusses molecular level organization and properties of TFLL as seen by these simulation studies. This article is part of a Special Issue entitled: Biosimulations edited by Ilpo Vattulainen and Tomasz Róg. PMID:26898663

  12. Closing the gap: The approach of optical and computational microscopy to uncover biomembrane organization.

    PubMed

    Eggeling, Christian; Honigmann, Alf

    2016-10-01

    Biological membranes are complex composites of lipids, proteins and sugars, which catalyze a myriad of vital cellular reactions in a spatiotemporal tightly controlled manner. Our understanding of the organization principles of biomembranes is limited mainly by the challenge to measure distributions and interactions of lipids and proteins within the complex environment of living cells. With the recent advent of super-resolution optical microscopy (or nanoscopy) one now has approached the molecular scale regime with non-invasive live cell fluorescence observation techniques. Since in silico molecular dynamics (MD) simulation techniques are also improving to study larger and more complex systems we can now start to integrate live-cell and in silico experiments to develop a deeper understanding of biomembranes. In this review we summarize recent progress to measure lipid-protein interactions in living cells and give examples how MD simulations can complement and upgrade the experimental data. This article is part of a Special Issue entitled: Biosimulations edited by Ilpo Vattulainen and Tomasz Róg. PMID:27039279

  13. An overview of molecular dynamics simulations of oxidized lipid systems, with a comparison of ELBA and MARTINI force fields for coarse grained lipid simulations.

    PubMed

    Siani, P; de Souza, R M; Dias, L G; Itri, R; Khandelia, H

    2016-10-01

    Biological membranes and model lipid systems containing high amounts of unsaturated lipids and sterols are subject to chemical and/or photo-induced lipid oxidation, which leads to the creation of exotic oxidized lipid products (OxPLs). OxPLs are known to have significant physiological impact in cellular systems and also affect physical properties of both biological and model lipid bilayers. In this paper we (i) provide a perspective on the existing literature on simulations of lipid bilayer systems containing oxidized lipid species as well as the main related experimental results, (ii) describe our new data of all-atom and coarse-grained simulations of hydroperoxidized lipid monolayer and bilayer systems and (iii) provide a comparison of the MARTINI and ELBA coarse grained force fields for lipid bilayer systems. We show that the better electrostatic treatment of interactions in ELBA is able to resolve previous conflicts between experiments and simulations. This article is part of a Special Issue entitled: Biosimulations edited by Ilpo Vattulainen and Tomasz Róg. PMID:27058982

  14. Encapsulated membrane proteins: A simplified system for molecular simulation.

    PubMed

    Lee, Sarah C; Khalid, Syma; Pollock, Naomi L; Knowles, Tim J; Edler, Karen; Rothnie, Alice J; R T Thomas, Owen; Dafforn, Timothy R

    2016-10-01

    Over the past 50years there has been considerable progress in our understanding of biomolecular interactions at an atomic level. This in turn has allowed molecular simulation methods employing full atomistic modelling at ever larger scales to develop. However, some challenging areas still remain where there is either a lack of atomic resolution structures or where the simulation system is inherently complex. An area where both challenges are present is that of membranes containing membrane proteins. In this review we analyse a new practical approach to membrane protein study that offers a potential new route to high resolution structures and the possibility to simplify simulations. These new approaches collectively recognise that preservation of the interaction between the membrane protein and the lipid bilayer is often essential to maintain structure and function. The new methods preserve these interactions by producing nano-scale disc shaped particles that include bilayer and the chosen protein. Currently two approaches lead in this area: the MSP system that relies on peptides to stabilise the discs, and SMALPs where an amphipathic styrene maleic acid copolymer is used. Both methods greatly enable protein production and hence have the potential to accelerate atomic resolution structure determination as well as providing a simplified format for simulations of membrane protein dynamics. This article is part of a Special Issue entitled: Biosimulations edited by Ilpo Vattulainen and Tomasz Róg. PMID:26946242

  15. Molecular modeling of lipid probes and their influence on the membrane.

    PubMed

    Faller, Roland

    2016-10-01

    In this review a number of Molecular Dynamics simulation studies are discussed which focus on the understanding of the behavior of lipid probes in biomembranes. Experiments often use specialized probe moieties or molecules to report on the behavior of a membrane and try to gain information on the membrane as a whole from the probe lipids as these probes are the only things an experiment sees. Probes can be used to make NMR, EPR and fluorescence accessible to the membrane and use fluorescent or spin-active moieties for this purpose. Clearly membranes with and without probes are not identical which makes it worthwhile to elucidate the differences between them with detailed atomistic simulations. In almost all cases these differences are confined to the local neighborhood of the probe molecules which are sparsely used and generally present as single molecules. In general, the behavior of the bulk membrane lipids can be qualitatively understood from the probes but in most cases their properties cannot be directly quantitatively deduced from the probe behavior. This article is part of a Special Issue entitled: Biosimulations edited by Ilpo Vattulainen and Tomasz Róg. PMID:26891817

  16. Committees and Sponsors

    NASA Astrophysics Data System (ADS)

    2012-05-01

    Local Organizing Committee J Fernando Barbero González (IEM, CSIC) Laura Castelló Gomar (Univ. Complutense, Madrid) Mikel Fernández Méndez (IEM, CSIC) Iñaki Garay Elizondo (Univ. País Vasco) Luis J Garay Elizondo (Univ. Complutense, Madrid) Mercedes Martín-Benito (Perimeter Institute, Canada) Daniel Martín de Blas (IEM, CSIC) Guillermo A Mena Marugán (IEM, CSIC) Javier Olmedo Nieto (IEM, CSIC) Gonzalo Olmo Alba (IFIC, CSIC) Tomasz Pawlowski (Warsaw University, Poland) Eduardo J Sánchez Villaseñor (Univ. Carlos III, Madrid) Scientific International Committee Abhay Ashtekar (Penn State University, USA) J Fernando Barbero González (IEM, CSIC, Spain) John Barrett (University of Nottingham, UK) José Manuel Cidade Mourão (Instituto Superior Técnico de Lisboa, Portugal) Laurent Freidel (Perimeter Institute, Canada) Jerzy Lewandowski (Warsaw University, Poland) Guillermo A Mena Marugán (IEM, CSIC, Spain) Jorge Pullin (Louisiana State University, USA) Carlo Rovelli (Univ. Méditerranée, Marseille, France) Thomas Thiemann (Univ. Erlangen-Nürnberg, Germany) Sponsors MinisterioBBVA CSICESF UniCarlosCPAN

  17. Effects of protein crowding on membrane systems.

    PubMed

    Guigas, Gernot; Weiss, Matthias

    2016-10-01

    Cellular membranes are typically decorated with a plethora of embedded and adsorbed macromolecules, e.g. proteins, that participate in numerous vital processes. With typical surface densities of 30,000 proteins per μm(2) cellular membranes are indeed crowded places that leave only few nanometers of private space for individual proteins. Here, we review recent advances in our understanding of protein crowding in membrane systems. We first give a brief overview on state-of-the-art approaches in experiment and simulation that are frequently used to study crowded membranes. After that, we review how crowding can affect diffusive transport of proteins and lipids in membrane systems. Next, we discuss lipid and protein sorting in crowded membrane systems, including effects like protein cluster formation, phase segregation, and lipid droplet formation. Subsequently, we highlight recent progress in uncovering crowding-induced conformational changes of membranes, e.g. membrane budding and vesicle formation. Finally, we give a short outlook on potential future developments in the field of crowded membrane systems. This article is part of a Special Issue entitled: Biosimulations edited by Ilpo Vattulainen and Tomasz Róg. PMID:26724385

  18. The cellular membrane as a mediator for small molecule interaction with membrane proteins.

    PubMed

    Mayne, Christopher G; Arcario, Mark J; Mahinthichaichan, Paween; Baylon, Javier L; Vermaas, Josh V; Navidpour, Latifeh; Wen, Po-Chao; Thangapandian, Sundarapandian; Tajkhorshid, Emad

    2016-10-01

    The cellular membrane constitutes the first element that encounters a wide variety of molecular species to which a cell might be exposed. Hosting a large number of structurally and functionally diverse proteins associated with this key metabolic compartment, the membrane not only directly controls the traffic of various molecules in and out of the cell, it also participates in such diverse and important processes as signal transduction and chemical processing of incoming molecular species. In this article, we present a number of cases where details of interaction of small molecular species such as drugs with the membrane, which are often experimentally inaccessible, have been studied using advanced molecular simulation techniques. We have selected systems in which partitioning of the small molecule with the membrane constitutes a key step for its final biological function, often binding to and interacting with a protein associated with the membrane. These examples demonstrate that membrane partitioning is not only important for the overall distribution of drugs and other small molecules into different compartments of the body, it may also play a key role in determining the efficiency and the mode of interaction of the drug with its target protein. This article is part of a Special Issue entitled: Biosimulations edited by Ilpo Vattulainen and Tomasz Róg. PMID:27163493

  19. The earliest mollusc dominated seep fauna from the Early Jurassic of Argentina

    NASA Astrophysics Data System (ADS)

    Kaim, Andrzej; Jenkins, Robert; Parent, Horacio; Garrido, Alberto; Moriya, Kazuhiro

    2015-04-01

    The earliest mollusc dominated seep fauna from the Early Jurassic of Argentina Andrzej Kaim, Robert G. Jenkins, Horacio Parent, Alberto C. Garrido The hydrocarbon seep deposits are known from Early Jurassic of Argentina since the report of Gomez-Perez (2003). The latter author identified very negative δ13C values (down to -33) and several fabrics typical for seep carbonates. Nevertheless she identified no macrofaunal assemblages apart from worm tubes. We re-visited the locality of Gomez-Perez (named here La Elina) and we were able to collect several molluscs associated with the seep carbonate. The most common and diversified are molluscs and worm tubes. We identified at least three species of gastropods, including the oldest-known species of neomphalids, lucinid and protobranch bivalves and numerous ammonoids. Unlike another known Early Jurassic seep from Oregon and the only Late Triassic seep (also from Oregon) there are no brachiopods associated with this seep. Therefore we consider the seep at La Elina as the oldest seep of modern aspect where the fauna is dominated by molluscs and not brachiopods.

  20. Applying the new genomics to alcohol dependence.

    PubMed

    Farris, Sean P; Pietrzykowski, Andrzej Z; Miles, Michael F; O'Brien, Megan A; Sanna, Pietro P; Zakhari, Samir; Mayfield, R Dayne; Harris, R Adron

    2015-12-01

    This review summarizes the proceedings of a symposium presented at the "Alcoholism and Stress: A Framework for Future Treatment Strategies" conference held in Volterra, Italy on May 6-9, 2014. The overall goal of the symposium titled "Applying the New Genomics to Alcohol Dependence", chaired by Dr. Adron Harris, was to highlight recent genomic discoveries and applications for profiling alcohol use disorder (AUD). Dr. Sean Farris discussed the gene expression networks related to lifetime consumption of alcohol within human prefrontal cortex. Dr. Andrzej Pietrzykowski presented the effects of alcohol on microRNAs in humans and animal models. Alcohol-induced alterations in the synaptic transcriptome were discussed by Dr. Michael Miles. Dr. Pietro Sanna examined methods to probe the gene regulatory networks that drive excessive alcohol drinking, and Dr. Samir Zakhari served as a panel discussant and summarized the proceedings. Collectively, the presentations emphasized the power of integrating multiple levels of genetics and transcriptomics with convergent biological processes and phenotypic behaviors to determine causal factors of AUD. The combined use of diverse data types demonstrates how unique approaches and applications can help categorize genetic complexities into relevant biological networks using a systems-level model of disease. PMID:25896098

  1. Editorial.

    PubMed

    Dudek, Dominika; Sobański, Jerzy A; Klasa, Katarzyna

    2015-01-01

    Dear Readers, In no time, we are almost halfway through 2015. Currently many issues concern psychiatrists, and does not fill them with optimism: an uncertain future implementation of the National Mental Health Protection Programme, or the recent amendment of criminal law, entering into force on 01.07.2015, on the significant enlargement of implementation of treatment and precautionary measures in psychiatric institutions. Prof. J.K. Gierowski [1] wrote in Psychiatria Polska about the misunderstanding and even conflict in this matter, between politicians, lawyers and psychiatric community, almost one and a half year ago. Several tragic, dramatic events (German Wings plane crash, the recent murder in Tworki) creates a bad social attitude towards the mentally ill. Our environment does not remain indifferent and is actively involved in the discussion - it is expressed by Letters to Editor, written by Elwira Marszałkowska-Krześ and Andrzej Brodziak, published in the current issue of the magazine. We are all aware of our responsibility - on the one hand for a safe environment for patients while ensuring adequate treatment to the ill, and on the other for creating the image of psychiatry and psychiatrists [2, 3]. (...). PMID:26276911

  2. Dynamical systems theory and applications

    NASA Astrophysics Data System (ADS)

    Awrejcewicz, Jan

    2006-08-01

    The 7th International Conference devoted to "Dynamical Systems-Theory and Applications" hold in 8-11 December, 2003 in Łódź, Poland, and it was organized by the staff of Department of Automatics and Biomechanics of the Technical University of Łódź. It was financially supported by the Rector of the Technical University of Łódź and the Department of Education and Physical Culture of the Łódź City Hall. The members of the International Scientific Committee included: Igor V. Andrianov (Dniepropetrovsk), Jan Awrejcewicz (Łódź), Iliya Blekhman (Sankt Petersburg), Roman Bogacz (Warszawa), Dick van Campen (Eindhoven), Zbigniew Engel (Kraków), Lothar Gaul (Stuttgart), Józef Giergiel (Kraków), Michał Kleiber (Warszawa), Vadim A. Krysko (Saratov), Włodzimierz Kurnik (Warszawa), Claude-Henri Lamarque (Lyon), Leonid I. Manevitch (Moscow), Jan Osiecki (Warszawa), Wiesaw Ostachowicz (Gdańsk), Ladislav Pust (Prague), Giuseppe Rega (Rome), Tsuneo Someya (Tokyo), Zbigniew Starczewski (Warszawa), Eugeniusz Świtoński (Gliwice), Andrzej Tylikowski (Warszawa), Tadeusz Uhl (Kraków), Aleksander F. Vakakis (Illinois), Józef Wojnarowski (Gliwice).

  3. Sublimation TiN Coating of RF Power Components

    NASA Astrophysics Data System (ADS)

    Lorkiewicz, J.; Kula, J.; Pszona, S.; Sobczak, J.; Bilinski, A.

    2008-03-01

    Titanium evaporation in a reactive atmosphere of ammonia has been chosen to deposit thin (up to 10 nm) protective surface layers containing titanium nitride and titanium oxinitrides which suppress secondary electron emission. The coating procedure, applied by the author in DESY (Hamburg) for TESLA couplers anti-multipactor protection, has been recently implemented in The Andrzej Soltan Institute for Nuclear Studies (IPJ) where a new coating device is used, equipped with a special titanium sublimation setup in a 100 1 vacuum chamber. Several arrays of cylindrical and coaxial RF coupler windows have been coated so far after optimizing the processing parameters. A check of the obtained surface layers ability to attenuate secondary electron emission has been performed; measurements of the secondary electron yield from TiN layers deposited on alumina samples were done in IPJ on as-delivered coated samples, then after vacuum bake-out and finally after additional electron bombardment of their surfaces. Also chemical composition of the surface layers has been studied using XPS in the Institute of Physical Chemistry (IChF).

  4. Efficient preparation and analysis of membrane and membrane protein systems.

    PubMed

    Javanainen, Matti; Martinez-Seara, Hector

    2016-10-01

    Molecular dynamics (MD) simulations have become a highly important technique to consider lipid membrane systems, and quite often they provide considerable added value to laboratory experiments. Rapid development of both software and hardware has enabled the increase of time and size scales reachable by MD simulations to match those attainable by several accurate experimental techniques. However, until recently, the quality and maturity of software tools available for building membrane models for simulations as well as analyzing the results of these simulations have seriously lagged behind. Here, we discuss the recent developments of such tools from the end-users' point of view. In particular, we review the software that can be employed to build lipid bilayers and other related structures with or without embedded membrane proteins to be employed in MD simulations. Additionally, we provide a brief critical insight into force fields and MD packages commonly used for membrane and membrane protein simulations. Finally, we list analysis tools that can be used to study the properties of membrane and membrane protein systems. In all these points we comment on the respective compatibility of the covered tools. We also share our opinion on the current state of the available software. We briefly discuss the most commonly employed tools and platforms on which new software can be built. We conclude the review by providing a few ideas and guidelines on how the development of tools can be further boosted to catch up with the rapid pace at which the field of membrane simulation progresses. This includes improving the compatibility between software tools and promoting the openness of the codes on which these applications rely. This article is part of a Special Issue entitled: Biosimulations edited by Ilpo Vattulainen and Tomasz Róg. PMID:26947184

  5. Rational design of liposomal drug delivery systems, a review: Combined experimental and computational studies of lipid membranes, liposomes and their PEGylation.

    PubMed

    Bunker, Alex; Magarkar, Aniket; Viitala, Tapani

    2016-10-01

    Combined experimental and computational studies of lipid membranes and liposomes, with the aim to attain mechanistic understanding, result in a synergy that makes possible the rational design of liposomal drug delivery system (LDS) based therapies. The LDS is the leading form of nanoscale drug delivery platform, an avenue in drug research, known as "nanomedicine", that holds the promise to transcend the current paradigm of drug development that has led to diminishing returns. Unfortunately this field of research has, so far, been far more successful in generating publications than new drug therapies. This partly results from the trial and error based methodologies used. We discuss experimental techniques capable of obtaining mechanistic insight into LDS structure and behavior. Insight obtained purely experimentally is, however, limited; computational modeling using molecular dynamics simulation can provide insight not otherwise available. We review computational research, that makes use of the multiscale modeling paradigm, simulating the phospholipid membrane with all atom resolution and the entire liposome with coarse grained models. We discuss in greater detail the computational modeling of liposome PEGylation. Overall, we wish to convey the power that lies in the combined use of experimental and computational methodologies; we hope to provide a roadmap for the rational design of LDS based therapies. Computational modeling is able to provide mechanistic insight that explains the context of experimental results and can also take the lead and inspire new directions for experimental research into LDS development. This article is part of a Special Issue entitled: Biosimulations edited by Ilpo Vattulainen and Tomasz Róg. PMID:26915693

  6. Spin transistor action via tunable Landau-Zener transitions in magnetic semiconductor quantum wells

    NASA Astrophysics Data System (ADS)

    Weiss, Dieter

    2013-03-01

    Spin-transistors, employing spin-orbit interaction like Datta-Das prototypes, principally suffer from low signal levels due to limitations in spin injection efficiency, fast spin relaxation and dephasing processes. Here we present an alternative concept to implement spin transistor action where efficiency is improved by keeping spin transport adiabatic. To this end a helical stray field B, generated by ferromagnetic Dysprosium stripes, is superimposed upon a two-dimensional electron system in (Cd,Mn)Te, containing Mn ions with spin 5/2. Due to the giant spin splitting, occurring at low temperatures and small B in (Cd,Mn)Te quantum wells, the B-helix translates into a spin-helix and the electron spins follow adiabatically the imposed spin texture. Within this approach the transmission of spin-polarized electrons between two contacts is regulated by changing the degree of adiabaticity, i.e. an electron's ability to follow the spin helix. This is done by means of a small applied homogeneous magnetic field while the degree of adiabaticity is monitored by the channel resistance. Our scheme allows spin information to propagate efficiently over typical device distances and provides an alternative route to realize spintronics applications. We note that our concept is not restricted to a particular choice of materials, temperature, methods of spin injection, manipulation as well as detection. Work done in cooperation with Christian Betthausen, Institute of Experimental and Applied Physics, University of Regensburg, D-93040 Regensburg, Germany; Tobias Dollinger, Henri Saarikosi, Institute of Theoretical Physics, University of Regensburg, D-93040 Regensburg, Germany; Valeri Kolkovsky, Grzegorz Karczewski, Tomasz Wojtowicz, Institute of Physics, Polish Academy of Sciences, PL-02668 Warsaw, Poland; and Klaus Richter, Institute of Theoretical Physics, University of Regensburg. Financial support from the Deutsche Forschungsgemeinschaft through SFB 689, WE 247618, and FOR 1483 is

  7. Atomistic resolution structure and dynamics of lipid bilayers in simulations and experiments.

    PubMed

    Ollila, O H Samuli; Pabst, Georg

    2016-10-01

    Accurate details on the sampled atomistic resolution structures of lipid bilayers can be experimentally obtained by measuring C-H bond order parameters, spin relaxation rates and scattering form factors. These parameters can be also directly calculated from the classical atomistic resolution molecular dynamics simulations (MD) and compared to the experimentally achieved results. This comparison measures the simulation model quality with respect to 'reality'. If agreement is sufficient, the simulation model gives an atomistic structural interpretation of the acquired experimental data. Significant advance of MD models is made by jointly interpreting different experiments using the same structural model. Here we focus on phosphatidylcholine lipid bilayers, which out of all model membranes have been studied mostly by experiments and simulations, leading to the largest available dataset. From the applied comparisons we conclude that the acyl chain region structure and rotational dynamics are generally well described in simulation models. Also changes with temperature, dehydration and cholesterol concentration are qualitatively correctly reproduced. However, the quality of the underlying atomistic resolution structural changes is uncertain. Even worse, when focusing on the lipid bilayer properties at the interfacial region, e.g. glycerol backbone and choline structures, and cation binding, many simulation models produce an inaccurate description of experimental data. Thus extreme care must be applied when simulations are applied to understand phenomena where the interfacial region plays a significant role. This work is done by the NMRlipids Open Collaboration project running at https://nmrlipids.blogspot.fi and https://github.com/NMRLipids. This article is part of a Special Issue entitled: Biosimulations edited by Ilpo Vattulainen and Tomasz Róg. PMID:26809025

  8. Transcurrent nature of the Teisseyre-Tornquist Zone in Central Europe: results of the POLCRUST-01 deep reflection seismic profile

    NASA Astrophysics Data System (ADS)

    Narkiewicz, M.; Maksym, A.; Malinowski, M.; Grad, M.; Guterch, A.; Petecki, Z.; Probulski, J.; Janik, T.; Majdański, M.; Środa, P.; Czuba, W.; Gaczyński, E.; Jankowski, L.

    2015-04-01

    Teisseyre-Tornquist Zone (TTZ) corresponds to a crustal boundary between the Precambrian East European Platform (EEP) and the Palaeozoic West European Platform. Although the zone has been controlling Phanerozoic evolution of large parts of Central Europe, its course, geometry and origin are still poorly constrained. Deep reflection seismic profile POLCRUST-01, recently acquired in SE Poland, for the first time allowed a precise comparison of the Ediacaran and later tectonic patterns to the deep crustal features of the TTZ and adjacent areas. The TTZ corresponds to the subvertical Tomaszów Fault separating the Radom-Kraśnik Elevation, composed of the typical EEP crust, from the Biłgoraj-Narol Block (BNB) in the SW, with a thinned crystalline basement showing affinities to the EEP crust. The BNB is a part of the larger Caledonian Łysogóry Terrane as evidenced by its Lower Palaeozoic stratigraphy and gravity data. Thus, for the first time, the proximal Baltican affinity of this unit has been documented unambiguously. The Łysogóry Terrane is delimited from the SW by the subvertical Cieszanów Fault Zone, corresponding to the Holy Cross Suture. The adjacent Małopolska Terrane is characterized by a distinct Early Palaeozoic stratigraphy, and lower-middle crust exhibiting SW-dipping reflective packages interpreted as NE-verging thrust and shear zones of a Neoproterozoic orogen. The observations from the POLCRUST-01 profile and regional comparisons indicate that the TTZ is a major Caledonian transcurrent zone between Poland and East Romania. In central Poland, the TTZ likely forms a narrow subvertical contact between the EEP and a proximal Kuiavia Terrane, as constrained by the deep refraction seismic data. To the NW, the zone extends towards the Pomeranian part of the Caledonide fold-and-thrust belt related to the Avalonia-Baltica collision zone (Thor Suture). South-east of Poland the TTZ corresponds to the Rava Ruska Fault Zone established as a Caledonian suture

  9. Non-Brownian diffusion in lipid membranes: Experiments and simulations.

    PubMed

    Metzler, R; Jeon, J-H; Cherstvy, A G

    2016-10-01

    -binding particles. We discuss how membrane compartmentalisation and the particle-membrane binding energy may impact the dynamics and response of lipid membranes. This article is part of a Special Issue entitled: Biosimulations edited by Ilpo Vattulainen and Tomasz Róg. PMID:26826272

  10. Computational studies of plasma lipoprotein lipids.

    PubMed

    Pan, Lurong; Segrest, Jere P

    2016-10-01

    atomistic detail. This review discusses the current status of computational methods including all-atom MD (AAMD), coarse-grain MD (CGMD), and MD-simulated annealing (MDSA) and their applications in lipoprotein structural dynamics and biological assemblies. Results from MD simulations are discussed and compared across studies in order to identify key findings, controversies, issues and future directions. This article is part of a Special Issue entitled: Biosimulations edited by Ilpo Vattulainen and Tomasz Róg. PMID:26969087

  11. Geophysical constraints on the crustal structure of the East European Platform margin and its foreland based on the POLCRUST-01 deep reflection seismic profile

    NASA Astrophysics Data System (ADS)

    Malinowski, M.; Guterch, A.; Narkiewicz, M.; Petecki, Z.; Janik, T.; Środa, P.; Maksym, A.; Probulski, J.; Grad, M.; Czuba, W.; Gaczyński, E.; Majdański, M.; Jankowski, L.

    2015-06-01

    A new 240-km long, deep seismic reflection profile (POLCRUST-01) was recently acquired in SE Poland crossing the East European Platform (EEP) margin south-east of the North-German-Polish Caledonides (NGPC). Here we document geophysical field work and subsequent data processing and modeling. Results obtained from reflection seismic data are augmented by results of the first-arrival tomography applied to co-located extended-offset refraction data, as well as potential field modeling and comparison with the available wide-angle reflection/refraction data. Our preferred model of the crustal structure, derived by integrating seismic, potential field and geological data, is composed of crustal blocks (terranes) separated by nearly-vertical faults. These are: (I) intact part of the EEP; (II) Łysogóry Terrane; (III) Małopolska Terrane; and (IV) Carpathian Mts. with their basement. Reflective lower crust of the EEP can be an inherited feature of crustal extension (rifting) or compressional tectonics acting at the cratonic margin. The Teisseyre-Tornquist Zone (TTZ) is depicted as a Caledonian transcurrent accretion zone corresponding with the near-vertical Tomaszów Fault, bounding the Łysogóry Terrane to the east. The crust of the Łysogóry Terrane suggests EEP affinity, although its middle/lower crust thickness is highly reduced. The Małopolska Terrane seems to be internally subdivided into blocks of different magnetic properties of the lower crust. The Carpathian frontal thrust is associated with a change in the rock properties in the deep basement (an unknown crustal block?) which is not visible in seismic data alone. The interpreted structure of the Caledonian terranes and their tectonic boundaries favors a transcurrent style of a crustal accretion along the central and SE Polish segments of the TTZ, implying a very complex nature of the Caledonian accretionary belt of Central Europe: from an array of terranes displaced along the TTZ to an accretionary wedge of

  12. A kinetic model of TBP auto-regulation exhibits bistability

    PubMed Central

    2010-01-01

    dimer is not very important in restoring the system to steady state. This model demonstrates the use of mathematical modelling to investigate system behaviour and generate hypotheses governing the dynamics of such nonlinear biological systems. Reviewers This article was reviewed by Tomasz Lipniacki, James Faeder and Anna Marciniak-Czochra. PMID:20687914

  13. [Princess Anna Vasa--her fascinating life story and skeleton].

    PubMed

    During, Ebba

    2005-01-01

    The Princess Anna Vasa was born in Sweden in 1568 and spent her first 19 years there. She was the daughter of the Swedish king Johan III and his wife, the Polish Royal Princess Katarina Jagellonica. She was brought up as a Catholic but converted to be a Protestant already in 1583 and remained a fervent Protestant to the end of her life. She was an exceptionally intelligent and extensively educated woman. When her brother became king, Sigismund III of Poland, she accompanied him there. She exerted great influence on Sigismund who was brought up to be a Catholic. She was persistent in her religion, yet working for religious liberty. "The Swedish Princess" was also named "the Queen of Polish Botany". She was never married and she died 57 years old in 1625. For religious reasons her body had to wait 11 years for a funeral of royal standing. The funeral took place in 1636 in St Mary's Church in Torun, Poland. During restoration work at the church in April 1994, Anna Vasa's skeleton was removed from the tomb, and an antropological investigation in order to establish her identity was carried by Dr Andrzej Florkowski at the Dept of Anthrop, Nicholas Copernicus University of Torun. I was invited to Torun to examine her remains in May 1995. The skeleton was in a rather good state of preservation. However, her grave had been plundered at least twice. Her skeleton lacked the right forearm and hand, probably as the result of the pillage of her rings and bracelets. Some other bones and teeth were also missing. At our ocular examination the skeleton revealed a number of anatomical deformations and pathological changes. A conventional radiography and CT of Anna Vasa's skeletal remains was later carried out in 1995 by M. Grzegorzewski, Z. Boron and W. Lasek at the Dept of Radiology, Med. Acad. of Bydgoszcz, Polen. A DNA-analysis was carried out by Dr Anders Götherström at the Archaeol. Res. Lab., Stockholm Univ. An odontological and radiological study was performed by Dr Sigrid I

  14. PREFACE: 10th Summer School on Theoretical Physics 'Symmetry and Structural Properties of Condensed Matter'

    NASA Astrophysics Data System (ADS)

    Lulek, Tadeusz; Wal, Andrzej; Lulek, Barbara

    2010-03-01

    also for several valuable discussion. We would like to express our thanks to all those who prepared manuscripts, to all referees who spent their time to significantly improve our elaborations, and thus the quality of this volume, to all members of our International Advisory Committee and to chairmen for their polite and efficient leading of sessions. It is our pleasure to express special gratitude to The Nicolas C Metropolis Mathematics Foundation (Los Alamos, USA) for substantial financial support of our three last SSPCM schools. Indeed, it provided an essential basis for performing these meetings. We direct this gratitude to Professor James D Louck, the President of this Foundation. Also, we were happy to hear from Professor Louck that this series of schools has had an important influence on his activities on application of unitary groups in physics. It has resulted in a new monograph: James D Louck, 'Unitary Symmetry and Combinatorics', World Scientific, New Jersey 2008, which was presented at our jubilee meeting. Tadeusz Lulek, Andrzej Wal and Barbara Lulek

  15. Dynamics of Populations of Planetary Systems (IAU C197)

    NASA Astrophysics Data System (ADS)

    Knezevic, Zoran; Milani, Andrea

    2005-05-01

    1. Resonances and stability of extra-solar planetary systems C. Beaugé, N. Callegari, S. Ferraz-Mello and T. A. Michtchenko; 2. Formation, migration, and stability of extrasolar planetary systems Fred C. Adams; 3. Dynamical evolution of extrasolar planetary systems Ji-Lin Zhou and Yi-Sui Sun; 4. Dynamics of planetesimals: the role of two-body relaxation Eiichiro Kokubo; 5. Fitting orbits Andrzej J. Maciejewski, Krzysztof Gozdziewski and Szymon Kozlowski; 6. The secular planetary three body problem revisited Jacques Henrard and Anne-Sophie Libert; 7. Dynamics of extrasolar systems at the 5/2 resonance: application to 47 UMa Dionyssia Psychoyos and John D. Hadjidemetriou; 8. Our solar system as model for exosolar planetary systems Rudolf Dvorak, Áron Süli and Florian Freistetter; 9. Planetary motion in double stars: the influence of the secondary Elke Pilat-Lohinger; 10. Planetary orbits in double stars: influence of the binary's orbital eccentricity Daniel Benest and Robert Gonczi; 11. Astrometric observations of 51 Peg and Gliese 623 at Pulkovo observatory with 65 cm refractor N. A. Shakht; 12. Observations of 61 Cyg at Pulkovo Denis L. Gorshanov, N. A. Shakht, A. A. Kisselev and E. V. Poliakow; 13. Formation of the solar system by instability Evgeny Griv and Michael Gedalin; 14. Behaviour of a two-planetary system on a cosmogonic time-scale Konstantin V. Kholshevnikov and Eduard D. Kuznetsov; 15. Boundaries of the habitable zone: unifying dynamics, astrophysics, and astrobiology Milan M. Cirkovic; 16. Asteroid proper elements: recent computational progress Fernando Roig and Cristian Beaugé; 17. Asteroid family classification from very large catalogues Anne Lemaitre; 18. Non-gravitational perturbations and evolution of the asteroid main belt David Vokrouhlicky, M. Broz and W. F. Bottke, D. Nesvorny and A. Morbidelli; 19. Diffusion in the asteroid belt Harry Varvoglis; 20. Accurate model for the Yarkovsky effect David Capek and David Vokrouhlicky; 21. The

  16. BOOK REVIEW: Image-Guided IMRT

    NASA Astrophysics Data System (ADS)

    Mayles, P.

    2006-12-01

    This book provides comprehensive coverage of the subject of intensity modulated radiotherapy and the associated imaging. Most of the names associated with advanced radiotherapy can be found among the 80 authors and the book is therefore an authoritative reference text. The early chapters deal with the basic principles and include an interesting comparison between views of quality assurance for IMRT from Europe and North America. It is refreshing to see that the advice given has moved on from the concept of individual patient based quality control to more generic testing of the delivery system. However, the point is made that the whole process including the data transfer needs to be quality assured and the need for thorough commissioning of the process is emphasised. The `tricks' needed to achieve a dose based IMRT plan are well covered by the group at Ghent and there is an interesting summary of biological aspects of treatment planning for IMRT by Andrzej Niemierko. The middle section of the book deals with advanced imaging aspects of both treatment planning and delivery. The contributions of PET and MR imaging are well covered and there is a rather rambling section on molecular imaging. Image guidance in radiotherapy treatment is addressed including the concept of adaptive radiotherapy. The treatment aspects could perhaps have merited some more coverage, but there is a very thorough discussion of 4D techniques. The final section of the book considers each site of the body in turn. This will be found useful by those wishing to embark on IMRT in a new area, although some of the sections are more comprehensive than others. The book contains a wealth of interesting and thought provoking articles giving details as well as broad principles, and would be a useful addition to every departmental library. The editors have done a good job of ensuring that the different chapters are complementary, and of encouraging a systematic approach to the descriptions of IMRT in

  17. PREFACE: International Conference on the Use of X-ray (and related) Techniques in Arts and Cultural Heritage (XTACH 11)

    NASA Astrophysics Data System (ADS)

    Hamdan, Nasser; El-Khatib, Sami

    2012-07-01

    The International Conference on the Use of X-Ray (and related) Techniques in Arts and Cultural Heritage (XTACH11) was held on 7 and 8 December 2011 at the American University of Sharjah (AUS) in the United Arab Emirates. The conference was organized in collaboration with the International Atomic Energy Agency (IAEA) and the National X-ray Fluorescence Laboratory (NXFL). The conference was inaugurated by Dr Peter Heath, Chancellor of the American University of Shrjah and attended by Mr Kwaku Aning, deputy Director General of the International Atomic Energy and Ambassador Hamad Al-Kaabi, Ambassador of the UAE to the International Atomic Energy university officials, faculty and students. The conference covered a variety of topics including the use of x-ray and micro beam x-ray analysis, synchrotron based techniques, ion beam and neutron based techniques, optical imaging and mass spectroscopy and chromatography techniques as well as best conservation practices. XTACH11 provided an excellent forum for scientists in the region to interact, exchange ideas and to initiate collaborations with each other as well as with the international community. It showcased some of the latest technical developments in the field of non-destructive testing for the diagnosis and conservation of cultural heritage materials. In addition to the presentations by the invited speakers (Rene van Grieken and K Janssens, University of Antwerp, Belgium; Thomas Calligaro, Centre de Recherche et de Restauration des Musees de France; Stefano Ridolfi, Ars Mensurae, Rome, Italy, and Andrzej Markowicz, IAEA, Austria), a total of 25 other research papers were also presented and discussed. Scientists from many countries participated in the conference: Austria, Belgium, Egypt, Italy, India, Iran, Iraq, Jordan, Lebanon, Qatar, Saudi Arabia, Spain, Sri Lanka, Syria, Thailand, the United Arab Emirates and Yemen. The conference concluded with a Discussion Panel. Thomas Calligaro (Centre de Recherché et de

  18. PREFACE: DISCRETE 2012 - Third Symposium on Prospects in the Physics of Discrete Symmetries

    NASA Astrophysics Data System (ADS)

    Branco, G. C.; Emmanuel-Costa, D.; González Felipe, R.; Joaquim, F. R.; Lavoura, L.; Palomares-Ruiz, S.; Rebelo, M. N.; Romão, J. C.; Silva, J. P.

    2013-07-01

    Romão, J P Silva and J I Silva-Marcos International Advisory CommitteeLocal Organising Committee Francisco del Águila (Granada)From CFTP Jose Bernabéu (Valencia) Francisco Botella (Valencia)G C Branco Andrzej Buras (Munich)D Emmanuel-Costa Marcos Cerrada (Madrid)R González Felipe Pierluigi Campana (CERN)F R Joaquim Antonio Di Domenico (Rome)L Lavoura John Ellis (CERN)S Palomares-Ruiz Fernando Ferroni (Rome)M N Rebelo Luis Garrido (Barcelona)J C Romão Marcello Giorgi (Pisa)J P Silva Neville Harnew (Oxford)J I Silva-Marcos Maria José Herrero (Madrid) David Hitlin (Caltech)From LIP Gino Isidori (Frascati) Guido Martinelli (Rome)G Barreira Antonio Masiero (Padua)J Varela Nickolaos Mavromatos (London) Vasiliki Mitsou (Valencia) Hitoshi Murayama (Berkeley) Tatsuya Nakada (Lausanne) Antonio Pich (Valencia) Apostolos Pilaftsis (Manchester) Stefan Pokorski (Warsaw) Fabio Zwirner (Padua) Secretariat Dulce Conceição Sandra Oliveira Cláudia Romão discrete2012@cftp.ist.utl.pt http://indico.cern.ch/event/discrete2012 Sponsors CFTP - Centro de Física Teórica de Partículas LIP - Laboratório de Instrumentação e Física Experimental de Partículas IST - Instituto Superior Técnico FCT - Fundação para a Ciência e a Tecnologia Group picture The PDF also contains the conference poster and a list of participants.

  19. List of Participants

    NASA Astrophysics Data System (ADS)

    2011-09-01

    KhodelVictorKurchatov Institute, Moscowvak@wuphys.wustl.edu KimuraMasaakiHokkaido University, Sapporomasaaki@nucl.sci.hokudai.ac.jp LacroixDenisGANIL, Caenlacroix@ganil.fr LiangHaozhaoPeking University, Beijinghzliang@pku.edu.cn MargueronJérômeIPN Orsayjerome.margueron@ipno.in2p3.fr MassotElisabethIPN Orsaymassot@ipno.in2p3.fr MengJiePeking University, Beijingmengj@pku.edu.cn MillerTomaszWarsaw University of Technologymillert@student.mini.pw.edu.pl MoghrabiKassemIPN Orsaymoghrabi@ipno.in2p3.fr NapolitaniPaoloIPN Orsaynapolita@ipno.in2p3.fr NeffThomasGSI Darmstadtt.neff@gsi.de NguyenVan GiaiIPN Orsaynguyen@ipno.in2p3.fr OtsukaTakaharuUniversity of Tokyootsuka@phys.s.u-tokyo.ac.jp PilletNathalie-MarieCEA-DAM, Arpajonnathalie.pillet@cea.fr QiChongKTH Stockholmchongq@kth.se RamananSunethraICTP Triestesramanan@ictp.it RingPeterTU Munichring@ph.tum.de Rios HuguetArnauUniversity of Surreya.rios@surrey.ac.uk RivetMarie-FranceIPN Orsayrivet@ipno.in2p3.fr RobledoLuisUniversidad Autonoma de Madridluis.robledo@uam.es Roca MazaXavierINFN Milanoxavier.roca.maza@mi.infn.it RöpkeGerdRostock Universitygerd.roepke@uni-rostock.de RowleyNeilIPN Orsayrowley@ipno.in2p3.fr SagawaHiroyukiUniversity of Aizusagawa@u-aizu.ac.jp SandulescuNicolaeIFIN-HH, Bucharestsandulescu@theory.nipne.ro SchuckPeterIPN Orsayschuck@ipno.in2p3.fr SedrakianArmenGoethe Universität Frankfurtsedrakian@th.physik.uni-frankfurt.de SeveryukhinAlexeyJINR Dubnasever@theor.jinr.ru SogoTakaakiIPN Orsaysogo@ipno.in2p3.fr SomàVittorioCEA Saclayvittorio.soma@cea.fr StrinatiGiancarloUniversità di Camerinogiancarlo.strinati@gmail.com SuharaTadahiroKyoto Universitysuhara@ruby.scphys.kyoto-u.ac.jp SukhoruchkinSergeiPetersburg Nuclear Physics Institutesergeis@pnpi.spb.ru SuzukiToruTokyo Metropolitan Universitysuzukitr@tmu.ac.jp SuzukiToshioNihon University, Tokyosuzuki@chs.nihon-u.ac.jp TarpanovDimitarINRNE, Sofiadimitert@yahoo.co.uk Tohsaki-SuzukiAkihiroOsaka Universitytohsaki@rcnp.osaka-u.ac.jp TypelStefanGSI Darmstadts

  20. Editorial

    NASA Astrophysics Data System (ADS)

    2003-06-01

    . Vol 35, No 21 (14 November 2002) L461-L467 A Bose-Einstein condensate in an optical lattice J Hecker Denschlag, J E Simsarian, H Häffner, C McKenzie, A Browaeys, D Cho, K Helmerson, S L Rolston and W D Phillips J. Phys. B: At. Mol. Opt. Phys. Vol 35, No 14 (28 July 2002) 3095-3110 Locality of a class of entangled states I R Senitzky J. Phys. B: At. Mol. Opt. Phys. Vol 35, No 14 (28 July 2002) 3029-3039 Solitons and vortices in ultracold fermionic gases Tomasz Karpiuk, Miroslaw Brewczyk and Kazimierz Rzazewski J. Phys. B: At. Mol. Opt. Phys. Vol 35, No 14 (28 July 2002) L315-L321 Stable islands in chaotic atom-optics billiards, caused by curved trajectories M F Andersen, A Kaplan, N Friedman and N Davidson J. Phys. B: At. Mol. Opt. Phys. Vol 35, No 9 (14 May 2002) 2183-2190 Emission probability and photon statistics of a coherently driven mazer Jin Xiong and Zhi-Ming Zhang J. Phys. B: At. Mol. Opt. Phys. Vol 35, No 9 (14 May 2002) 2159-2172 The Li+-H2 system in a rigid-rotor approximation: potential energy surface and transport coefficients I Røeggen, H R Skullerud, T H Løvaas and D K Dysthe J. Phys. B: At. Mol. Opt. Phys. Vol 35, No 7 (14 April 2002) 1707-1725 The stochastic Gross-Pitaevskii equation C W Gardiner, J R Anglin and T I A Fudge J. Phys. B: At. Mol. Opt. Phys. Vol 35, No 6 (28 March 2002) 1555-1582 Oxygen ion impurity in the TEXTOR tokamak boundary plasma observed and analysed by Zeeman spectroscopy J D Hey, C C Chu, S Brezinsek, Ph Mertens and B Unterberg J. Phys. B: At. Mol. Opt. Phys. Vol 35, No 6 (28 March 2002) 1525-1553 Electron-hexafluoropropene (C3F6) scattering at intermediate energies Czeslaw Szmytkowski, Pawel Mozejko and Stanislaw Kwitnewski J. Phys. B: At. Mol. Opt. Phys. Vol 35, No 5 (14 March 2002) 1267-1274 High-resolution investigations of C2 and CN optical emissions in laser-induced plasmas during graphite ablation S Acquaviva and M L De Giorgi J. Phys. B: At. Mol. Opt. Phys. Vol 35, No 4 (28 February 2002) 795-806 New definition of a

  1. EDITORIAL: Focus on Cloud Physics FOCUS ON CLOUD PHYSICS

    NASA Astrophysics Data System (ADS)

    Falkovich, Gregory; Malinowski, Szymon P.

    2008-07-01

    condensation nuclei Antonio Celani, Andrea Mazzino and Marco Tizzi Laboratory and modeling studies of cloud-clear air interfacial mixing: anisotropy of small-scale turbulence due to evaporative cooling Szymon P Malinowski, Miroslaw Andrejczuk, Wojciech W Grabowski, Piotr Korczyk, Tomasz A Kowalewski and Piotr K Smolarkiewicz Evolution of non-uniformly seeded warm clouds in idealized turbulent conditions Stanislav Derevyanko, Gregory Falkovich and Sergei Turitsyn Lagrangian statistics in two-dimensional free turbulent convection A Bistagnino and G Boffetta Turbulence, raindrops and the l1/2 number density law S Lovejoy and D Schertzer Effects of turbulence on the geometric collision rate of sedimenting droplets. Part 2. Theory and parameterization Orlando Ayala, Bogdan Rosa and Lian-Ping Wang Effects of turbulence on the geometric collision rate of sedimenting droplets. Part 1. Results from direct numerical simulation Orlando Ayala, Bogdan Rosa, Lian-Ping Wang and Wojciech W Grabowski Collisions of particles advected in random flows K Gustavsson, B Mehlig and M Wilkinson Turbulent collision efficiency of heavy particles relevant to cloud droplets Lian-Ping Wang, Orlando Ayala, Bogdan Rosa and Wojciech W Grabowski

  2. PREFACE: DISCRETE '08: Symposium on Prospects in the Physics of Discrete Symmetries

    NASA Astrophysics Data System (ADS)

    Bernabéu, José; Botella, Francisco J.; Mavromatos, Nick E.; Mitsou, Vasiliki A.

    2009-07-01

    guideline of Symmetry and Symmetry Breaking was an added value to the interest of such an event. The Symposium was attended by 160 participants, among which 63 from Spain, 77 coming from the rest of Europe, 10 from USA and 10 from the rest of the world. The Symposium started with a welcome address by Dr Vasiliki Mitsou, Co-Chair of the Organising Committee, and Professor Francisco J Botella, Director of IFIC. The scientific plenary sessions started with a discussion on the search for Time Reversal Violation, independent of CP and/or CPT symmetries, by Helen Quinn. Related to this important subject, David Wark made a presentation of the state of the art in the measurement of Electric Dipole Moments. The status and prospects of CP-violation Experiments was reviewed by Tatsuya Nakada, whereas Andrzej Buras made a comprehensive discussion on the search for New Physics with Rare Decays and CP Violation. The implications for Cosmology were presented by Mikhail Shaposhnikov with a talk on Baryogenesis. The pending understanding of the Flavour Problem was discussed by Graham G Ross in his presentation on Family Symmetries. Going beyond the paradigm imposed by local quantum field theories, Nikolaos Mavromatos described the scenario of CPT Violation and Decoherence in Quantum Gravity. Antonio Di Domenico presented the status on the search for CPT Violation and Decoherence in the Neutral Kaon System and José L F Barbón covered the territory of Strings, Symmetry and Holography. The problem of the Quantum Vacuum was addessed by Mariano Quirós in his presentation on the nature of the Electroweak Higgs sector. In Cosmology, Pierre Binetruy treated the fascinating question of the possible concepts to explain the Dark Energy in the Universe. On the theme of High Energy Messengers from the Cosmos, Graciela Gelmini presented the solved and unsolved questions associated with the High Energy Cosmic Rays, Manel Martínez discussed methods to study Fundamental Physics with Cosmic Gamma Rays

  3. Mathcad in the Chemistry Curriculum Symbolic Software in the Chemistry Curriculum

    NASA Astrophysics Data System (ADS)

    Zielinski, Theresa Julia

    2000-05-01

    collection of peer-reviewed documents is developing through this column at the JCE Internet Web site, http://jchemed.chem.wisc.edu/JCEWWW/Features/ McadInChem/index.html. With this column we add three peer-reviewed and tested Mathcad documents to the JCE site. In Linear Least-Squares Regression, Sidney H. Young and Andrzej Wierzbicki demonstrate various implicit and explicit methods for determining the slope and intercept of the regression line for experimental data. The document shows how to determine the standard deviation for the slope, the intercept, and the standard deviation of the overall fit. Students are next given the opportunity to examine the confidence level for the fit through the Student's t-test. Examination of the residuals of the fit leads students to explore the possibility of rejecting points in a set of data. The document concludes with a discussion of and practice with adding a quadratic term to create a polynomial fit to a set of data and how to determine if the quadratic term is statistically significant. There is full documentation of the various steps used throughout the exposition of the statistical concepts. Although the statistical methods presented in this worksheet are generally accessible to average physical chemistry students, an instructor would be needed to explain the finer points of the matrix methods used in some sections of the worksheet. The worksheet is accompanied by a set of data for students to use to practice the techniques presented. It would be worthwhile for students to spend one or two laboratory periods learning to use the concepts presented and then to apply them to experimental data they have collected for themselves. Any linear or linearizable data set would be appropriate for use with this Mathcad worksheet. Alternatively, instructors may select sections of the document suited to the skill level of their students and the laboratory tasks at hand. In a second Mathcad document, Non-Linear Least-Squares Regression, Young and

  4. PREFACE: Symmetry and Structural Properties of Condensed Matter

    NASA Astrophysics Data System (ADS)

    Lulek, Tadeusz; Wal, Andrzej; Lulek, Barbara

    2008-03-01

    tradition. We would also like to acknowledge the support of European Physical Society. On behalf of the organizers of SSPCM 2007 Tadeusz Lulek, Andrzej Wal and Barbara Lulek Editors

  5. PREFACE: Physics and biology of neurodegenerative diseases Physics and biology of neurodegenerative diseases

    NASA Astrophysics Data System (ADS)

    Pastore, Annalisa

    2012-06-01

    -imaging and quantification of human substantia nigra using synchrotron radiation based x-ray fluorescence—in relation to Parkinson's diseaseMagdalena Szczerbowska-Boruchowska, Anna Krygowska-Wajs and Dariusz Adamek Explaining the length threshold of polyglutamine aggregationPaolo De Los Rios, Marc Hafner and Annalisa Pastore The role of iron in neurodegeneration—Mössbauer spectroscopy, electron microscopy, enzyme-linked immunosorbent assay and neuroimaging studiesJolanta Galazka-Friedman, Erika R Bauminger, Karol Szlachta and Andrzej Friedman Crowding versus molecular seeding: NMR studies of protein aggregation in hen egg whiteD Sanfelice, M Adrover, G Martorell, A Pastore and P A Temussi

  6. PREFACE: International Conference on the Use of X-ray (and related) Techniques in Arts and Cultural Heritage (XTACH 11)

    NASA Astrophysics Data System (ADS)

    Hamdan, Nasser; El-Khatib, Sami

    2012-07-01

    The International Conference on the Use of X-Ray (and related) Techniques in Arts and Cultural Heritage (XTACH11) was held on 7 and 8 December 2011 at the American University of Sharjah (AUS) in the United Arab Emirates. The conference was organized in collaboration with the International Atomic Energy Agency (IAEA) and the National X-ray Fluorescence Laboratory (NXFL). The conference was inaugurated by Dr Peter Heath, Chancellor of the American University of Shrjah and attended by Mr Kwaku Aning, deputy Director General of the International Atomic Energy and Ambassador Hamad Al-Kaabi, Ambassador of the UAE to the International Atomic Energy university officials, faculty and students. The conference covered a variety of topics including the use of x-ray and micro beam x-ray analysis, synchrotron based techniques, ion beam and neutron based techniques, optical imaging and mass spectroscopy and chromatography techniques as well as best conservation practices. XTACH11 provided an excellent forum for scientists in the region to interact, exchange ideas and to initiate collaborations with each other as well as with the international community. It showcased some of the latest technical developments in the field of non-destructive testing for the diagnosis and conservation of cultural heritage materials. In addition to the presentations by the invited speakers (Rene van Grieken and K Janssens, University of Antwerp, Belgium; Thomas Calligaro, Centre de Recherche et de Restauration des Musees de France; Stefano Ridolfi, Ars Mensurae, Rome, Italy, and Andrzej Markowicz, IAEA, Austria), a total of 25 other research papers were also presented and discussed. Scientists from many countries participated in the conference: Austria, Belgium, Egypt, Italy, India, Iran, Iraq, Jordan, Lebanon, Qatar, Saudi Arabia, Spain, Sri Lanka, Syria, Thailand, the United Arab Emirates and Yemen. The conference concluded with a Discussion Panel. Thomas Calligaro (Centre de Recherché et de

  7. EDITORIAL: Strongly correlated electron systems Strongly correlated electron systems

    NASA Astrophysics Data System (ADS)

    Ronning, Filip; Batista, Cristian

    2011-03-01

    -dependent Zeeman splitting in strontium ruthenate Emil J Rozbicki, James F Annett, Jean-René Souquet and Andrew P Mackenzie Thermodynamics of itinerant metamagnetic transitions A M Berridge Magnon-mediated pairing and isotope effect in iron-based superconductors Jiansheng Wu and Philip Phillips Nernst quantum oscillations in bulk semi-metals Zengwei Zhu, Huan Yang, Aritra Banerjee, Liam Malone, Benoît Fauqué and Kamran Behnia Signatures of a quantum Griffiths phase in a d-metal alloy close to its ferromagnetic quantum critical point Almut Schroeder, Sara Ubaid-Kassis and Thomas Vojta Influence of super-ohmic dissipation on a disordered quantum critical point Thomas Vojta, José A Hoyos, Priyanka Mohan and Rajesh Narayanan The van Hemmen-Kondo model for disordered cerium systems S G Magalhaes, F M Zimmer and B Coqblin Chemical pressure, dilution and disorder in the heavy fermion compounds Ce3 - xLaxPd20Si6 (x = 1/3, 2/3) H Winkler, K-A Lorenzer, S Laumann, J Custers, A Prokofiev and S Paschen Magnetism of fine particles of Kondo lattices, obtained by high-energy ball-milling E V Sampathkumaran, K Mukherjee, Kartik K Iyer, Niharika Mohapatra and Sitikantha D Das Heavy fermion scaling: uranium versus cerium and ytterbium compounds J M Lawrence, C H Wang, A D Christianson and E D Bauer Temperature dependence of hybridization gaps in metallic heavy-fermion systems Xiaodong Yang, Peter S Riseborough and Tomasz Durakiewicz Low-energy properties of the Kondo lattice model O Bodensiek, R Žitko, R Peters and T Pruschke Temperature dependence of the zero-bias anomaly in the Anderson-Hubbard model: insights from an ensemble of two-site systems R Wortis and W A Atkinson A charge density wave in the hidden order state of URu2Si2 Jung-Jung Su, Yonatan Dubi, Peter Wölfle and Alexander V Balatsky Field-induced suppression of the heavy-fermion state in YbRh2Si2 Gertrud Zwicknagl Discontinuous Hall coefficient at the quantum critical point in YbRh2Si2 Sven Friedemann, Niels Oeschler, Steffen

  8. PREFACE: Particles and Fields: Classical and Quantum

    NASA Astrophysics Data System (ADS)

    Asorey, M.; Clemente-Gallardo, J.; Marmo, G.

    2007-07-01

    BERETTA, Gian Paolo: Università di Brescia, Italy BHAMATHI, Gopalakrishnan: University of Texas at Austin, USA BOYA, Luis Joaquín: Universidad de Zaragoza, Spain CARIÑENA, José F.: Universidad de Zaragoza, Spain CELEGHINI, Enrico: Università di Firenze & INFN, Italy CHRUSCINSKI, Dariusz: Nicolaus Copernicus University, Torun, Poland CIRILO-LOMBARDO, Diego: Bogoliubov Laboratory of Theoretical Physics (JINR-Dubna), Russia CLEMENTE-GALLARDO, Jesus: BIFI-Universidad de Zaragoza, Spain DE LUCAS, Javier: Universidad de Zaragoza, Spain FALCETO, Fernando: Universidad de Zaragoza, Spain GINOCCHIO, Joseph: Los Alamos National Laboratory, USA GORINI, Vittorio: Universitá' dell' Insubria, Como, Italy INDURAIN, Javier: Universidad de Zaragoza, Spain KLAUDER, John: University of Florida, USA KOSSAKOWSKI, Andrzej: Nicolaus Copernicus University, Torun, Poland MARMO, Giuseppe: Università di Napoli Federico II, Italy MORANDI, Giuseppe: Universitá di Bologna-Italy MUKUNDA, Narasimhaiengar: Indian Institute of Science, Bangalore, India MUÑOZ-CASTAÑEDA, Jose M.: University of Zaragoza, Spain NAIR, RANJIT: Centre for Philosophy & Foundations of Science, New Delhi, India NILSSON, Jan S: University of Gothenburg, Sweden OKUBO, Susumu: University of Rochester, USA PASCAZIO, Saverio: Universitá di Bari, Italy RIVERA HERNÁNDEZ, Rayito: Université Pierre et Marie Curie, Paris, France RODRIGUEZ, Cesar: University of Texas - Austin, USA SCOLARICI, Giuseppe: Universitá del Salento, Lecce, Italy SEGUI, Antonio

  9. List of Participants

    NASA Astrophysics Data System (ADS)

    2008-11-01

    cole Polytechnique, Palaiseau and University of Crete Denis KleversPhysikalisches Institut, Universität Bonn Paul Koerber Max-Planck-Institut für Physik, München Simon Koers Max-Planck-Institut für Physik, München Karl KollerLudwig-Maximilians-Universität, München Peter Koroteev Institute for Theoretical and Experimental Physics (ITEP), Moscow and Max-Planck-Institut für Gravitationsphysik (AEI), Potsdam Alexey KoshelevVrije Universiteit, Brussel Costas KounnasÉcole Normale Supérieure, Paris Daniel KreflCERN, Geneva Charlotte KristjansenNiels Bohr Institute, København Finn LarsenCERN, Geneva and University of Michigan Arnaud Le DiffonÉcole Normale Supérieure, Lyon Michael LennekCentre de Physique Théorique, École Polytechnique, Palaiseau Alberto Lerda Università del Piemonte Orientale, Alessandria Andreas LiberisUniversity of Patras Maria A Lledo Universidad de Valencia Oscar Loaiza-Brito CINVESTAV, Mexico Florian Loebbert Max-Planck-Institut für Gravitationsphysik (AEI), Potsdam Yolanda Lozano University of Oviedo Dieter Luest Ludwig-Maximilians-Universität, München Tomasz Łukowski Jagiellonian University, Krakow Diego Mansi University of Crete Alberto Mariotti Università di Milano-Bicocca Raffaele Marotta Istituto Nazionale di Fisica Nucleare, Napoli Alessio Marrani Istituto Nazionale di Fisica Nucleare and LNF, Firenze Andrea Mauri University of Crete Liuba Mazzanti École Polytechnique, Palaiseau Sean McReynoldsUniversità di Milano-Bicocca AKM Moinul Haque Meaze Chittagong University Patrick Meessen Instituto de Física Teórica, Universidad Autónoma de Madrid Carlo MeneghelliUniversità di Parma and Albert-Einstein-Institut, Golm Lotta Mether University of Helsinki and CERN, Geneva René Meyer Max-Planck-Institut für Physik, München Georgios MichalogiorgakisCenter de Physique Théorique, École Polytechnique, Palaiseau Giuseppe Milanesi Eidgenössische Technische Hochschule (ETH), Zürich Samuel Monnier Université de Genève Wolfgang Mueck

  10. BOOK REVIEW Cracking the Einstein Code: Relativity and the Birth of Black Hole Physics With an Afterword by Roy Kerr Cracking the Einstein Code: Relativity and the Birth of Black Hole Physics With an Afterword by Roy Kerr

    NASA Astrophysics Data System (ADS)

    Carr, Bernard

    2011-02-01

    , where he wrote his seminal paper. The second strength of this book is that it shows how Kerr's discovery related to other developments in the field. Progress in physics is rarely made in isolation and there is a strong supporting cast in this drama. The key to his breakthrough was the simplification of Einstein's equations entailed in studying what are termed `shear-free' solutions. The first clue came from Ray Sachs, whose studies of asymptotically shear-free bundles of light-rays reduced Einstein's equations to manageable form. Ivor Robinson and Andrzej Trautman then considered bundles which are shear-free everywhere but they were looking for solutions with gravity waves rather than time-independent ones and so missed the great discovery. Kerr learnt about these developments at a 1962 meeting on Gravitation and General Relativity in Warsaw, which clearly played a seminal role in the development of his ideas. But what most excited him was the enthusiastic summary of Vitaly Ginzburg, extolling the virtues of general relativity and emphasizing the need to understand strong gravity effects such as rotation. In any case, he returned to Austin convinced that he had the tools required to solve the problem. At first, he was discouraged when Newman claimed to prove that no shear-free space is possible but fortunately Kerr found a mistake in this work. By using coordinates which incorporated the rotational symmetry of the problem, he was able to find an exact solution in which the metric contains an event horizon and is asymptotically rotating. Since the Warsaw meeting played such a crucial role, it is interesting to recall that Richard Feynman also attended the meeting and described it in rather unflattering terms in a letter to his wife [2]: `I am not getting anything out of the meeting. I am learning nothing. Because there are no experiments, this field is not an active one, so few of the best men are doing work in it. The result is that there are hosts of dopes here and it