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Sample records for wilfried eckart schreiber

  1. Eckart ro-vibrational Hamiltonians via the gateway Hamilton operator: Theory and practice

    Science.gov (United States)

    Szalay, Viktor

    2017-03-01

    Recently, a general expression for Eckart-frame Hamilton operators has been obtained by the gateway Hamiltonian method [V. Szalay, J. Chem. Phys. 142, 174107 (2015) and V. Szalay, J. Chem. Phys. 143, 064104 (2015)]. The kinetic energy operator in this general Hamiltonian is nearly identical to that of the Eckart-Watson operator even when curvilinear vibrational coordinates are employed. Its different realizations correspond to different methods of calculating Eckart displacements. There are at least two different methods for calculating such displacements: rotation and projection. In this communication, the application of Eckart Hamiltonian operators constructed by rotation and projection, respectively, is numerically demonstrated in calculating vibrational energy levels. The numerical examples confirm that there is no need for rotation to construct an Eckart ro-vibrational Hamiltonian. The application of the gateway method is advantageous even when rotation is used since it obviates the need for differentiation of the matrix rotating into the Eckart frame. Simple geometrical arguments explain that there are infinitely many different methods for calculating Eckart displacements. The geometrical picture also suggests that a unique Eckart displacement vector may be defined as the shortest (mass-weighted) Eckart displacement vector among Eckart displacement vectors corresponding to configurations related by rotation. Its length, as shown analytically and demonstrated by numerical examples, is equal to or less than that of the Eckart displacement vector one can obtain by rotation to the Eckart frame.

  2. Eckart ro-vibrational Hamiltonians via the gateway Hamilton operator: Theory and practice.

    Science.gov (United States)

    Szalay, Viktor

    2017-03-28

    Recently, a general expression for Eckart-frame Hamilton operators has been obtained by the gateway Hamiltonian method [V. Szalay, J. Chem. Phys. 142, 174107 (2015) and V. Szalay, J. Chem. Phys. 143, 064104 (2015)]. The kinetic energy operator in this general Hamiltonian is nearly identical to that of the Eckart-Watson operator even when curvilinear vibrational coordinates are employed. Its different realizations correspond to different methods of calculating Eckart displacements. There are at least two different methods for calculating such displacements: rotation and projection. In this communication, the application of Eckart Hamiltonian operators constructed by rotation and projection, respectively, is numerically demonstrated in calculating vibrational energy levels. The numerical examples confirm that there is no need for rotation to construct an Eckart ro-vibrational Hamiltonian. The application of the gateway method is advantageous even when rotation is used since it obviates the need for differentiation of the matrix rotating into the Eckart frame. Simple geometrical arguments explain that there are infinitely many different methods for calculating Eckart displacements. The geometrical picture also suggests that a unique Eckart displacement vector may be defined as the shortest (mass-weighted) Eckart displacement vector among Eckart displacement vectors corresponding to configurations related by rotation. Its length, as shown analytically and demonstrated by numerical examples, is equal to or less than that of the Eckart displacement vector one can obtain by rotation to the Eckart frame.

  3. Amniogenesis in Schreiber's long-fingered bat Miniopterus ...

    African Journals Online (AJOL)

    Schreiber's long-fingered bat, Miniopterus schreibersii natalensis is seasonally monoestrous, carrying a single foetus in the right uterine horn. Implantation is superficial, the amnion being a pleuramnion. Lateral folds, originating from the ends of the caudal and cephalic folds, are the main contributors in the formation of the ...

  4. The importance of hydraulic groundwater theory in catchment hydrology: The legacy of Wilfried Brutsaert adn Jean-Yves Parlange

    NARCIS (Netherlands)

    Troch, P.A.; Berne, A.; Bogaart, P.W.; Harman, C.; Hilberts, A.G.J.; Lyon, S.W.; Paniconi, C.; Pauwels, V.R.N.; Rupp, D.E.; Selker, J.S.; Teuling, A.J.; Uijlenhoet, R.; Verhoest, N.E.C.

    2013-01-01

    Based on a literature overview, this paper summarizes the impact and legacy of the contributions of Wilfried Brutsaert and Jean-Yves Parlange (Cornell University) with respect to the current state-of-the-art understanding in hydraulic groundwater theory. Forming the basis of many applications in

  5. Nonlinear waves in an ultrarelativistic heat-conducting fluid II (Eckart formulation

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    Sebastiano Giambò

    2012-06-01

    Full Text Available In this paper a second-order theory for relativistic heat-conducting fluids is derived in the Eckart scheme, based on the assumption that the entropy 4-current should include quadratic terms in the heat flux. In the special case of ultrarelativistic fluids, the velocities of hydrodynamic and thermal weak discontinuity wave fronts are determined and, through the second-order compatibility conditions, the discontinuities associated to the waves and the transport equations for the amplitude of the discontinuities are found out. Finally, for heat wave, plane, cylindrical and spherical diverging waves are also investigated.

  6. Extended Eckart Theorem and New Variation Method for Excited States of Atoms

    CERN Document Server

    Xiong, Zhuang; Bacalis, N C; Zhou, Qin

    2016-01-01

    We extend the Eckart theorem, from the ground state to excited statew, which introduces an energy augmentation to the variation criterion for excited states. It is shown that the energy of a very good excited state trial function can be slightly lower than the exact eigenvalue. Further, the energy calculated by the trial excited state wave function, which is the closest to the exact eigenstate through Gram-Schmidt orthonormalization to a ground state approximant, is lower than the exact eigenvalue as well. In order to avoid the variation restrictions inherent in the upper bound variation theory based on Hylleraas, Undheim, and McDonald [HUM] and Eckart Theorem, we have proposed a new variation functional Omega-n and proved that it has a local minimum at the eigenstates, which allows approaching the eigenstate unlimitedly by variation of the trial wave function. As an example, we calculated the energy and the radial expectation values of Triplet-S(even) Helium atom by the new variation functional, and by HUM a...

  7. VizieR Online Data Catalog: Post common envelope binaries from SDSS. VIII (Schreiber+, 2010)

    Science.gov (United States)

    Schreiber, M. R.; Gaensicke, B. T.; Rebassa-Mansergas, A.; Nebot Gomez-Moran, A.; Southworth, J.; Schwope, A. D.; Mueller, M.; Papadaki, C.; Pyrzas, S.; Rabitz, A.; Rodriguez-Gil, P.; Schmidtobreick, L.; Schwarz, R.; Tappert, C.; Toloza, O.; Vogel, J.; Zorotovic, M.

    2010-03-01

    The file rv.dat contains the name of the WDMS binary, the time of the spectroscopic observation and the corresponding radial velocity. Using a spectral decomposition method we derived estimates of the stellar parameters and the distance to the system listed in sy.dat. This file also contains the statistical significance of the measured radial velocity variations derived from the velocities given in rv.dat. The stellar parameters have been taken from Rebassa-Mansergas et al. (2010, Cat. ) and Nebot-Gomez Moran (2010, A&A in prep.). The spectral decomposition method is described in Rebassa-Mansergas et al. (2007, Cat. ). Some radial velocities have been published earlier in Schreiber et al. (2008A&A...484..441S) (2 data files).

  8. Review: Wilfried Breyvogel (Ed.) (2005). Einführung in Jugendkulturen. Veganismus und Tattoos [Introduction to Youth Cultures. Veganism and Tattoos

    OpenAIRE

    Sebastian Schröer

    2007-01-01

    Wilfried BREYVOGEL's introductory textbook combines three individual texts. As well as an historic overview of diverse "youth cultures" there are two extensive contributions devoted to veganism (Thomas SCHWARZ) and tattoos (Tobias LOBSTÄDT). BREYVOGEL's contribution is a literature-based study, whereas SCHWARZ and LOBSTÄDT present work based on original research. However, expectations of an introductory textbook are disappointed because the book does not contain a well-founded and "tight" the...

  9. The importance of hydraulic groundwater theory in catchment hydrology: The legacy of Wilfried Brutsaert and Jean-Yves Parlange

    Science.gov (United States)

    Troch, Peter A.; Berne, Alexis; Bogaart, Patrick; Harman, Ciaran; Hilberts, Arno G. J.; Lyon, Steve W.; Paniconi, Claudio; Pauwels, Valentijn R. N.; Rupp, David E.; Selker, John S.; Teuling, Adriaan J.; Uijlenhoet, Remko; Verhoest, Niko E. C.

    2013-09-01

    Based on a literature overview, this paper summarizes the impact and legacy of the contributions of Wilfried Brutsaert and Jean-Yves Parlange (Cornell University) with respect to the current state-of-the-art understanding in hydraulic groundwater theory. Forming the basis of many applications in catchment hydrology, ranging from drought flow analysis to surface water-groundwater interactions, hydraulic groundwater theory simplifies the description of water flow in unconfined riparian and perched aquifers through assumptions attributed to Dupuit and Forchheimer. Boussinesq (1877) derived a general equation to study flow dynamics of unconfined aquifers in uniformly sloping hillslopes, resulting in a remarkably accurate and applicable family of results, though often challenging to solve due to its nonlinear form. Under certain conditions, the Boussinesq equation can be solved analytically allowing compact representation of soil and geomorphological controls on unconfined aquifer storage and release dynamics. The Boussinesq equation has been extended to account for flow divergence/convergence as well as for nonuniform bedrock slope (concave/convex). The extended Boussinesq equation has been favorably compared to numerical solutions of the three-dimensional Richards equation, confirming its validity under certain geometric conditions. Analytical solutions of the linearized original and extended Boussinesq equations led to the formulation of similarity indices for baseflow recession analysis, including scaling rules, to predict the moments of baseflow response. Validation of theoretical recession parameters on real-world streamflow data is complicated due to limited measurement accuracy, changing boundary conditions, and the strong coupling between the saturated aquifer with the overlying unsaturated zone. However, recent advances are shown to have mitigated several of these issues. The extended Boussinesq equation has been successfully applied to represent baseflow

  10. Handedness in the echolocating Schreiber's Long-Fingered Bat (Miniopterus schreibersii).

    Science.gov (United States)

    Zucca, Paolo; Palladini, Alessandra; Baciadonna, Luigi; Scaravelli, Dino

    2010-07-01

    Bats, in terms of variety of species and their absolute numbers, are the most successful mammals on earth. The anatomical and functional peculiarities of Microchiroptera are not confined only to the auditory system; the wings (hands) of bats are unique both from an anatomical point of view as from a sensorial one. They are much thinner than those of birds and their bony structure is much more similar to a primate hand than to the forelimb of other mammals of the bat's size; the thumb, is very small and on its distal end there is a little claw that bats use for crawling and manipulating food. However, despite this very frequent use of the hands for food catching and for walking, nothing is known about the existence of a preferential use of the hands in Microchiroptera. The present study investigates the existence of handedness in the Schreiber's Long-Fingered Bat by recording the preferential use of the hand while climbing the walls of a plastic cylinder. This bat species is lateralized at population level and shows a left forelimb bias when using hands for climbing/grasping. This result is the first evidence of population-level handedness in an echolocating bat species. Copyright (c) 2010 Elsevier B.V. All rights reserved.

  11. Efeito do meio Erd Schreiber no cultivo das microalgas Dunaliella salina, Tetraselmis chuii e Isochrysis galbana = Erd Schreiber medium effect in culture of microalgae Dunaliella salina, Tetraselmis chuii and Isochrysis galbana

    Directory of Open Access Journals (Sweden)

    Vera Lucia Mota Klein

    2006-04-01

    Full Text Available As microalgas são utilizadas como fonte de alimento em aqüicultura. Neste trabalho cultivaram-se D. salina, T. chuii e I. galbana. O objetivo do trabalho consistiu em determinar o efeito do meio Erd Schreiber sobre o seu crescimento. Iniciou-se o cultivo com a mistura de 200 mg de Na2HPO4,7H2O, 100 mg de NaNO3 e 50 mL de extrato de solo. No monitoramento, manteve-se a temperatura entre 24 - 28 oC, a salinidade a 34 ppt, à iluminação constante, a densidade celular com uma câmara de Neubauer e um microscópio binocular modelo ZEISS. Como resultado, I. galbana, D. salina e T. chuii atingiram 969 104 cel/mL, 457 x 104 cel/mL e 258,66 x 104 cel/mL, respectivamente, e oscoeficientes angulares b foram 3,76 x 104 cel./mL/dia, 6,84 x 104 cel./mL/dia e 2,08 x 104 cel./mL/dia respectivamente, indicando bom desempenho de todas as microalgas no meio Erd Shreiber.The microalgae is used as food source in aqüicultura. In this work they had cultivated D. salina , T. chuii and I. galbana . The objective of the work is to determine the effect of Erd Schreiber´s culture medium on the microalgae growth. The culture initiated mixting 200mg of Na2HPO4,7H2O, 100 mg of NaNO3 and 50 mL of soil extract. During the culture the temperature had varied between 24 and 28oC, the salinity was fixed on 34 %o, and the illumination was maintained constant. The assessment of the culture was made by a chamber of Neubauer and a binocular microscope ZEISS model. As result I. galbana D. salina and T.chuii reached 969 104 cel/mL, 457 x 104cel/mL and 258,66 x 104 cel/mL respectively and as angular coefficient 3,76 x 104 cel/mL/dia, 6,84 x 104 cel/mL/dia and 2,08 104 x cel/mL/dia respectively, showing good answer of the microalgae to the effect of Erd Schreiber´ s medium.

  12. The notes of Father Anselm Eckart, S. J., on some animals from the State of Grão-Pará and Maranhão (1785

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    Nelson Papavero

    2011-12-01

    Full Text Available The passages related to the fauna of the State of Grão-Pará and Maranhão, written by Father Anselm Eckart (1721-1807, S. J., in 1785, are translated and commented. Critical notes about every cited animal were included, bringing the species knowledge up to date and comparing the zoological and linguistic information compiled by the Jesuit with other contemporary documents and with the related scientific literature.

  13. Review: Wilfried Breyvogel (Ed. (2005. Einführung in Jugendkulturen. Veganismus und Tattoos [Introduction to Youth Cultures. Veganism and Tattoos

    Directory of Open Access Journals (Sweden)

    Sebastian Schröer

    2007-09-01

    Full Text Available Wilfried BREYVOGEL's introductory textbook combines three individual texts. As well as an historic overview of diverse "youth cultures" there are two extensive contributions devoted to veganism (Thomas SCHWARZ and tattoos (Tobias LOBSTÄDT. BREYVOGEL's contribution is a literature-based study, whereas SCHWARZ and LOBSTÄDT present work based on original research. However, expectations of an introductory textbook are disappointed because the book does not contain a well-founded and "tight" theoretical derivation on the topic of "youth cultures," and the two choice of the two exemplary youth cultures makes little sense. Furthermore, the individual contributions show flaws in both content and format. URN: urn:nbn:de:0114-fqs0703279

  14. Pseudospin symmetric solution of the Dirac–Eckart problem with a Hulthén tensor interaction in the tridiagonal representation

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    Jie Gao

    2017-06-01

    Full Text Available Under the condition of the pseudospin symmetry, the approximate analytical solution of the Dirac–Eckart problem with a Hulthén tensor interaction is investigated by working in a complete square integrable basis that supports a tridiagonal matrix representation of the wave operator. The pseudo-centrifugal term is treated with Greene and Aldrich's approximation scheme. The energy eigenvalue equation is obtained by diagonalization of the recursion relation and the corresponding spinor wave functions are presented in terms of Jacobi polynomials or hypergeometric functions.

  15. Operativität und Akteure des Literatursystems. Eine Replik auf Dominik Schreibers Artikel »Literarische Kommunikation« und Jörg Schönerts Kommentar

    Directory of Open Access Journals (Sweden)

    David-Christopher Assmann

    2011-11-01

    Full Text Available Die Replik nimmt Jörg Schönerts Kommentar zu Dominik Schreibers Artikel »Literarische Kommunikation« zum Anlass, die Frage literarischer Operativität mit dem Status von Akteuren im Literatursystem zu koppeln. Im Zentrum steht dabei der Vorschlag, zwischen Akteuren als Funktionen und Personen literarischer Kommunikation zu unterscheiden.

  16. Review: Birgit Schreiber (2006. Versteckt. Jüdische Kinder im nationalsozialistischen Deutschland und ihr Leben danach [Hidden. Jewish Children in National Socialist Germany and Their Lives Afterwards

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    Birgit Griese

    2007-09-01

    Full Text Available In her empirical study, Hidden. Jewish children in National Socialist Germany and their lives afterwards, Birgit SCHREIBER analyses five autobiographical interviews. She presents different perspectives to the reader: a the contemporary, political dimension of the topic concerning German history and recollection, b the (problematic structures of communication between German Jews and non-Jewish Germans (keywords: "crisis of witnesses", c a narrative prospect and analysis, and d a psychoanalytic access of the life stories of traumatized people. Its special potentials—partly innovation and, at the same time, its soft spots—lie in these "multidimensional prospects" of the study. On the one hand, it seems to be unclear where to put the emphasis; is it an Oral-History study, a structural narration, mainly autobiographical work or psychoanalytically substantiated research? On the other hand, the different perspectives allow a sensitive way of dealing with specific forms of communication and meeting and providing a special, empathetic way of analyzing data. Above all, this "mixture" offers the possibility of a wide discussion of basic topics within qualitative research—especially the relation between science and therapy, ethics in research and the construction of an empirically grounded typology. URN: urn:nbn:de:0114-fqs0703166

  17. 808-IJBCS-Article-Wilfried Bonou

    African Journals Online (AJOL)

    DR GATSING

    extraits aqueux de. Moringa oleifera ont été testés sur 1288 jeunes plants de 15 provenances de néré (Parkia biglobosa) pour évaluer leur croissance morphologique. Les provenances étaient issues de 15 villages échantillonnés dans les 5.

  18. 808-IJBCS-Article-Wilfried Bonou

    African Journals Online (AJOL)

    DR GATSING

    plantes dans les soins de plusieurs affections en Afrique de l'Ouest (Lejoly, 1990 ; Sokpon et Ouinsavi, 2004; Koura, 2005). Ces affections seraient pour la plupart les plaies par brûlures, les dermatoses, les oedèmes, les bronchites, la dysenterie, la stérilité, l'oreillon et la pneumonie (CIRAD-GRET-MAE, 2002). En plus, le ...

  19. 1220-IJBCS-Article- Koblan Wilfried Ebogninin

    African Journals Online (AJOL)

    hp

    interne des solutions de polymère, des mesures rhéologiques ont été effectuées (en régime dynamique). Il s'agit de mesurer : i) le module élastique ( )G′ (qui est proportionnel à l'énergie élastique emmagasinée et restituée au cours d'une période) et, ii) le module visqueux ( ). G′′ (l'énergie dissipée par frottement ...

  20. VizieR Online Data Catalog: Number counts produced by the EGG (Schreiber+, 2017)

    Science.gov (United States)

    Schreiber, C.; Elbaz, D.; Pannella, M.; Merlin, E.; Castellano, M.; Fontana, A.; Bourne, N.; Boutsia, K.; Cullen, F.; Dunlop, J.; Ferguson, H. C.; Michalowski, M. J.; Okumura, K.; Santini, P.; Shu, X. W.; Wang, T.; White, C.

    2017-03-01

    The Empirical Galaxy Generator (EGG) is a tool to produce mock galaxy catalogs for deep fields. This table compiles the number counts generated by the tool (v1.0.5) in multiple bands from the U band (0.35um) to the millimeter (2mm). These counts were generated from three different mock catalogs of increasing area and decreasing depth, to obtain a large dynamic range on the fluxes. The counts only include the contribution of the stellar and dust emission of galaxies. They do not account for emission from ionized/atomic/molecular gas, or active galactic nuclei, and they assume no attenuation by clouds from our own galaxy. Differential counts are defined as dN/dlog(flux)/dV. (1 data file).

  1. Serogroups and antimicrobial susceptibility among Escherichia coli isolated from farmed mink (Mustela vison Schreiber) in Denmark

    DEFF Research Database (Denmark)

    Vulfson, L.; Pedersen, Karl; Chriel, M.

    2001-01-01

    Escherichia coli is commonly found in outbreaks of diarrhoea in mink during the production season although its role as a primary causal organism remains unclear. The present study was undertaken to determine the serogroups and antimicrobial susceptibility of E. coli isolates from healthy and diar...

  2. Serogroups and antimicrobiological susceptability among Escherichia coli isolated from farmed mink (Mustela vison Schreiber) in Denmark

    DEFF Research Database (Denmark)

    Vulfson, L.; Pedersen, K.; Chriél, Mariann

    2001-01-01

    Escherichia coli is commonly found in outbreaks of diarrhoea in mink during the production season although its role as a primary causal organism remains unclear. The present study was undertaken to determine the serogroups and antimicrobial susceptibility of E. coli isolates from healthy and diar...

  3. Distribution and morphology of cholinergic, catecholaminergic and serotonergic neurons in the brain of Schreiber's long-fingered bat, Miniopterus schreibersii.

    Science.gov (United States)

    Maseko, Busisiwe C; Manger, Paul R

    2007-11-01

    The current study describes the nuclear parcellation and neuronal morphology of the cholinergic, catecholaminergic and serotonergic systems within the brain of a representative species of microbat. While these systems have been investigated in detail in the laboratory rat, and examined in several other mammalian species, no chiropterans, to the author's knowledge, have been examined. Using immunohistochemical stains for choline-acetyltransferase, tyrosine hydroxylase and serotonin, we were able to observe and document these systems in relation to the cytoarchitecture. The majority of cholinergic nuclei typically found in mammals were evident in the microbat, however we could not find evidence for choline-acetyltransferase immunopositive neurons in the Edinger-Westphal nucleus, parabigeminal nucleus, and the medullary tegmental field, as seen in several other mammalian species. A typically mammalian appearance of the catecholaminergic nuclei was observed, however, the anterior hypothalamic groups (A15 dorsal and ventral), the dorsal and dorsal caudal subdivisions of the ventral tegmental area (A10d and A10dc), and the ventral (pars reticulata) substantia nigra (A9v) were not present. The serotonergic nuclei were similar to that reported in all eutherian mammalian species studied to date. The overall complement of nuclei of these systems in the microbat, while different to the species examined in other orders of mammals, resembles most closely the complement seen in earlier studies of insectivore species, and is clearly distinguished from that seen in rodents, carnivores and primates. This data is discussed in terms of the phylogenetic relationships of the chiropterans.

  4. Assessment of the aerobic faecal microflora in mink (Mustela vison Schreiber) with emphasis on Escherichia coli and Staphylococcus intermedius

    DEFF Research Database (Denmark)

    Vulfson, L.; Pedersen, Karl; Chriél, Mariann

    2003-01-01

    The present study was undertaken to investigate the culturable aerobic faecal microflora of mink from newborn until adulthood with emphasis on the potential pathogens Escherichia coli and beta-haemolytic coagulase positive staphylococci. Rectal swabs were taken from 10 healthy dams and their offs...

  5. Wilfried Kürschner (Hg., Linguisten-Handbuch: Biographische und bibliographische Daten deutschsprachiger Sprachwissenschaftlerinnen und Sprachwissenschaftler der Gegenwart, I-II, Tübingen, Gunter Narr Verlag, 1994, XXX-1191 pp.

    Directory of Open Access Journals (Sweden)

    Žarko Muljačić

    1994-12-01

    Full Text Available Sebbene questo manuale fosse ideato nell'ormai lontano 1988 esso vede luce, a cura di W. Kurschner (1945-, professore di linguistica generale e germanica all'Universita di Osnabriick (sede di Vechta, appena ora. Una delle ragioni che hanno differito la sua pubblicazione è il fatto che fino al 1990 non esisteva un indirizzario dei linguisti attivi nella ex RDT. Le poche persone che già nel 1989 risposero all'appello dalla Germania Orientale appartenevano quasi esclusivamente all'Istituto Centrale di Linguistica dell'Accademia delle Scienze (ZISW di Berlino (Est e neanche essi erano liberi di rispondere all'intero Questionario (in base a ordini ricevuti hanno dovuto "saltare" ogni risposta alle domande Nr. 5, 6, 16, 18 e 31 (cf. W. Kurschner, "Notizen zur Entstehung des Linguisten-Handbuchs", vol. I, XII-XIV e il divertente e che queste domande si riferivano a cose del tutto "normali" (per es. ai numeri dei telefoni privato e d'ufficio e alle attività svolte fra la fine degli studi e l'ultimo incarico di lavoro.

  6. Offshore wind power systems in Schleswig-Holstein; Offshore in Schleswig-Holstein

    Energy Technology Data Exchange (ETDEWEB)

    Voigt, W. [Ministerium fuer Finanzen und Energie des Landes Schleswig-Holstein, Kiel (Germany)

    2002-07-01

    At a Rotarian meeting on Helgoland, Secretary of State Wilfried Voigt of the Schleswig-Holstein Energy Ministry held a much-discussed plea in favour of offshore wind power. [German] Anlaesslich einer Veranstaltung der Rotarier auf der Insel Helgoland hat Staatssekretaer Wilfried Voigt, Energieministerium Schleswig-Holstein, ein vielbeachtetes Plaedoyer fuer den Offshore Einsatz der Windenergie gehalten. (orig.)

  7. Editorial Comment on: D. Schreiber-Dietrich, M. Pohl, X.W. Cui, B. Braden, C.F. Dietrich, L. Chiorean Perihepatic lymphadenopathy in children with chronic viral hepatitis

    Directory of Open Access Journals (Sweden)

    Katarzyna Gruszczyńska

    2015-09-01

    Full Text Available The article entitled Perihepatic lymphadenopathy in children with chronic viral hepatitis(1 is an original paper of high clinical relevance – viral hepatitis B and C are the main causes of chronic hepatitis and liver cirrhosis in children. Based on ultrasound fi ndings, the authors assessed the presence of the perihepatic lymph nodes and their morphology in 49 children with chronic viral hepatitis B and C (38 and 11 children, respectively. The authors hoped that this investigation would help establish a new, non-invasive marker enabling screening examinations to be conducted in children with chronic viral hepatitis. In adults, a correlation was found between the activity of hepatitis and the morphology of the lymph nodes in a US examination, but such a correlation has, until now, not been reported in children(2–4. The results of the study have a clinically signifi cant aspect – the loops of the hepatoduodenal ligament are relatively readily available in a transabdominal examination, and ultrasonography is an inexpensive and safe method to be conducted in children.

  8. Myoglobin Test

    Science.gov (United States)

    ... MB , Troponin , Cardiac Biomarkers Conditions: Kidney Disease , Heart Disease , Heart ... 24, 2015) Schreiber D. Cardiac Markers. Medscape Reference. Available online at http://emedicine.medscape. ...

  9. Underwater Acoustics and the U.S. Navy: A Preliminary Historical Bibliography. Volume 1. 1917-1946

    Science.gov (United States)

    1983-12-16

    Camp, Glen D. and Eckart, Carl. Some Theoretical Studies of the PropagatLon of "Souni in Shallow Water. NDRC 6.1- sr30 -1208, Rpt. U-102, UCDWR, 15 Aug...1943.’ Eckart, Carl. The Attenuation of Sound in the Sea. NDRC 6.1- sr30 -1532, Service Project NS.-14, Rpt. •-236, UCDWR, 6 July 1944. S__

  10. Randall-Sundrum model with {lambda}<0 and bulk brane viscosity

    Energy Technology Data Exchange (ETDEWEB)

    Lepe, Samuel [Instituto de Fisica, Pontificia Universidad Catolica de Valparaiso, Casilla 4950, Valparaiso (Chile); Pena, Francisco [Departamento de Ciencias Fisicas, Facultad de Ingenieria, Ciencias y Administracion, Universidad de la Frontera, Avda. Francisco Salazar 01145, Casilla 54-D, Temuco (Chile); Saavedra, Joel [Instituto de Fisica, Pontificia Universidad Catolica de Valparaiso, Casilla 4950, Valparaiso (Chile)], E-mail: joel.saavedra@ucv.cl

    2008-04-17

    We study the effect of the inclusion of bulk brane viscosity on brane world (BW) cosmology in the framework of the Eckart's theory, we focus in the Randall-Sundrum model with negative tension on the brane.

  11. Shock structure in massless gases

    Directory of Open Access Journals (Sweden)

    Armando Majorana

    1991-05-01

    Full Text Available The shock structure problem is investigated in the framework of the Eckart theory of irreversible thermodynamics in the ultra relativistic limit. It is considered a neutrino gas and a gas in the approximation of hard sphere model.

  12. Etude de la Relation entre l'abondance des grands mammifères ...

    African Journals Online (AJOL)

    ... grands mammifères frugivores et celle des fruits dans le Parc National de Moukalaba-Doudou, Gabon. Fred Loïque Mindonga Nguelet, Christophe Roland Zinga Koumba, Jacques François Mavoungou, Ephrem Nzengue, Etienne François Akomo-Okoue, Yoshihiro Nakashima, Shun Hongo, Ghislain Wilfried Ebang Ella, ...

  13. International Journal of Biological and Chemical Sciences - Vol 10 ...

    African Journals Online (AJOL)

    Vegetarian diet in Guenon and Mangabey monkeys of Moukalaba-Doudou National Park, Gabon: similarities and differences · EMAIL FREE FULL TEXT EMAIL FREE FULL TEXT · DOWNLOAD FULL TEXT DOWNLOAD FULL TEXT. Lilian Brice Mangama-Koumba, Ghislain Wilfried Ebang Ella, Etienne François ...

  14. Vegetarian diet in Guenon and Mangabey monkeys of Moukalaba ...

    African Journals Online (AJOL)

    php/ijbcs http://indexmedicus.afro.who.int. Vegetarian diet in Guenon and Mangabey monkeys of Moukalaba-Doudou. National Park, Gabon: Similarities and Differences. Lilian Brice MANGAMA-KOUMBA1,2*, Ghislain Wilfried EBANG ELLA1,2,.

  15. Cancer bronchique à petites cellules et grossesse: à propos d'un ...

    African Journals Online (AJOL)

    Cancer bronchique à petites cellules et grossesse: à propos d'un cas avec revue de la literature. Fatima Safini, Hassan Jjouhadi, Asmaa Chehal, Farida Mernissi, Akpoo Wilfried, Zineb Bouchbika, Amina Taleb, Nadia Benchakroun, Nezha Tawfiq, Souha Sahraoui, Abdellatif Benider ...

  16. Tartu Ülikooli uued audoktorid

    Index Scriptorium Estoniae

    2003-01-01

    Tartu Ülikooli uued audoktorid on: Wilfried Schlüter, Liisa Marjatta Ahtee, Hans Hilmar Goebel, Tapani Ruutu, Jürgen Mittelstrass, Keijo Aarre Virtanen, Giovanni Romeo, José Luis Abbud Mas, Svennik Haeyer, Björn Wittrock

  17. To be continued ...

    Directory of Open Access Journals (Sweden)

    Wilfried Swoboda

    2012-09-01

    Full Text Available Eine Münze reist quer durch Europa – begleitet von einer Handy-Kamera und Youtube! Wilfried Swoboda nimmt uns mit auf eine Reise in das Medienkompetenztraining an der Schule Holzhausergasse und erläutert eingehend seine diesbezüglichen Erfahrungen.

  18. Explaining Iran’s Foreign Policy, 1979-2009

    Science.gov (United States)

    2010-12-01

    Press, 2007): 125. 88 Jason Brownlee , Authoritarianism in an Age of Democratization (New York: Cambridge University Press, 2007): 164. 89 Trita...York, NY: Random House, 2005): 324. 98 Trita Parsi, Treacherous Alliance (New Haven: Yale University Press, 2007): 221. 99 Jason Brownlee ...1984. Brownlee , Jason . Authoritarianism in an Age of Democratization. New York: Cambridge University Press, 2007. Buchta, Wilfried. Who Rules

  19. Ostrich: Journal of African Ornithology - Vol 75, No 4 (2004)

    African Journals Online (AJOL)

    Robert E Simmons, Phoebe Barnard, WR J Dean, Guy F Midgley, Wilfried Thuiller, Greg Hughes, 295-308. http://dx.doi.org/10.2989/00306520409485458 ... Short Note Co-operative breeding in the Pygmy Falcon Polihierax semitorquatus · EMAIL FULL TEXT EMAIL FULL TEXT · DOWNLOAD FULL TEXT DOWNLOAD ...

  20. The Effect of Tensor Interaction in Splitting the Energy Levels of Relativistic Systems

    Directory of Open Access Journals (Sweden)

    Mohammad Reza Shojaei

    2016-01-01

    Full Text Available We solve approximately Dirac equation for Eckart plus Hulthen potentials with Coulomb-like and Yukawa-like tensor interaction in the presence of spin and pseudospin symmetry for k≠0. The formula method is used to obtain the energy eigenvalues and wave functions. We also discuss the energy eigenvalues and the Dirac spinors for Eckart plus Hulthen potentials with formula method. To show the accuracy of the present model, some numerical results are shown in both pseudospin and spin symmetry limits.

  1. Exploiting Novel Calcium-Mediated Apoptotic Processes for the Treatment of Human Breast Cancers with Elevated Nqo1 Levels

    Science.gov (United States)

    2008-03-01

    Escherichia coli , which requires recA function and the presence of a duplicate genome. J Mol Biol 1977; 116:81–98. 2. D’Andrea AD, Haseltine WA. Modification...1716, 2001. 16. Nghiem, P., Park, P. K., Kim Ys, Y. S., Desai, B. N., and Schreiber, S. L. ATR is not required for p53 activation but synergizes with...Kim Ys YS, Desai BN, Schreiber SL. ATR is not required for p53 activation but synergizes with p53 in the replication checkpoint. J Biol Chem 2002;277

  2. Paleoecology of the Neogene Agbada formation, Niger Delta, Nigeria

    African Journals Online (AJOL)

    Paleoecology of the Neogene Agbada formation, Niger Delta, Nigeria. Bankole Samson, Eckart Schrank, Peter Adeonipekun. Abstract. Abundant and well preserved assemblages of pollen, spores, dinoflagellates, freshwater algae and fungal remains had been encountered and documented from three selected wells within ...

  3. HSR Rule Changes: A Look Back (and Ahead)

    OpenAIRE

    Deidre Johnson; Simone Waterbury; Jonathan Cheng; Adam Eckart

    2013-01-01

    Ultimately because ofâ۠or perhaps in spite ofâ۠the new 4(d), associates, and revenue disclosures, we have noted a positive clearance trend. Deidre Johnson, Simone Waterbury, Jonathan Cheng, & Adam Eckart (Ropes & Gray)

  4. Bound-state energy of double magic number plus one nucleon ...

    Indian Academy of Sciences (India)

    2017-01-03

    Jan 3, 2017 ... In this work, we have obtained energy levels and charge radius for the β-stability line nucleus, in ... levels of nuclei is to consider the nucleon–nucleon ..... A: Math. Gen. 34, 9827 (2001). [17] M R Shojaei and M Mousavi, Adv. High Energy Phys. 2016,. Article ID 8314784, 12 pages (2016). [18] C Eckart, Phys ...

  5. Bound-state energy of double magic number plus one nucleon ...

    Indian Academy of Sciences (India)

    Keywords. Shell model; Dirac equation; Eckart potential; Hulthen potential; parametric Nikiforov–Uvarov method. Abstract. In this work, we have obtained energy levels and charge radius for the β-stability line nucleus, in relativistic shell model. In this model, we considered a close shell for each nucleus containing double ...

  6. Spin-adapted matrix product states and operators

    Science.gov (United States)

    Keller, Sebastian; Reiher, Markus

    2016-04-01

    Matrix product states (MPSs) and matrix product operators (MPOs) allow an alternative formulation of the density matrix renormalization group algorithm introduced by White. Here, we describe how non-abelian spin symmetry can be exploited in MPSs and MPOs by virtue of the Wigner-Eckart theorem at the example of the spin-adapted quantum chemical Hamiltonian operator.

  7. Rate coefficients for hydrogen abstraction reaction of pinonaldehyde ...

    Indian Academy of Sciences (India)

    The H abstraction reaction from the –CHO group was found to be the most dominant reaction channelamong all the possible reaction pathways and its corresponding rate coefficient at 300 K is kEckart's unsymmetrical= 3.86 ×10-10 cm3 molecule-1 s-1. Whereas the channel with immediate lower activation energy is the ...

  8. Defining Adaptive Leadership in the Context of Mission Command

    Science.gov (United States)

    2011-06-10

    Schreiber. 2006. Complexity leadership theory : An interactive perspective on leading in complex adaptive systems. http://digitalcommons. unl.edu/cgi...Free Press. Schneider, Marguerite, and Mark Somers, Organizations as complex adaptive systems: Implications of complexity theory for leadership ...12 December 2010). Uhl-Bien, Mary, Russ Marion, and Bill McKelvey. Complexity leadership theory : Shifting leadership from the industrial age to the

  9. Die sprachliche Realisierung der Textsorte "politischer Appell" im Slowenischen

    Directory of Open Access Journals (Sweden)

    Marja Bešter

    1995-12-01

    Full Text Available Die Texte, die den Korpus für die folgende sprachliche Analyse bilden, möchte ich zuerst in bezug auf vier Kriterien darstellen: a in bezug auf den Kanal, b auf Zeit und Ort der Entstehung, c auf den Textverfasser bzw. Schreiber und d auf das Zielpublikum.

  10. Bivariate discrete Linnik distribution

    Directory of Open Access Journals (Sweden)

    Davis Antony Mundassery

    2014-10-01

    Full Text Available Christoph and Schreiber (1998a studied the discrete analogue of positive Linnik distribution and obtained its characterizations using survival function. In this paper, we introduce a bivariate form of the discrete Linnik distribution and study its distributional properties. Characterizations of the bivariate distribution are obtained using compounding schemes. Autoregressive processes are developed with marginals follow the bivariate discrete Linnik distribution.

  11. The Patient's Perception of the role of Prayer in the Family Practice ...

    African Journals Online (AJOL)

    Reticence, to research prayer, based on the potential of divine punitive .... Clerk. Foreman humanist. Teacher Agnostic humanist. Hindu ..... Their inquiry is inhibited by respect for the doctor.A respondent viewed her GP's inquiry about her religion as a sign of respect. Schreiber34 wrote that the lack of doctors' inquiry might ...

  12. Untitled

    Indian Academy of Sciences (India)

    Tamura Y, Fujii K 1991 A multi-dimensional upwind scheme for the Euler equations on structured grid. Proc. 4th Int, Symp. CFD. (Davis) 2: 1137-1142. Tweedt D L, Schreiber H A, Starken H 1988 Experimental investigation of the performance of a supersonic compressor cascade. Trans. ASME, J. Turbomach. 110: 456-466.

  13. Exploiting Novel-Calcium-Mediated Apoptotic Processes for the Treatment of Human Breast Cancers with Elevated NQO1 Levels

    Science.gov (United States)

    2007-03-01

    References 1. Krasin, F. and Hutchinson, F. Repair of DNA double-strand breaks in Escherichia coli , which requires recA function and the presence...S., Desai, B. N., and Schreiber, S. L. ATR is not required for p53 activation but synergizes with p53 in the replication checkpoint. J Biol Chem

  14. Notes on Salamandra salamandra ssp

    NARCIS (Netherlands)

    Hillenius, D.

    1968-01-01

    On 22-VII-1960 I caught some specimens of Salamandra salamandra fastuosa Schreiber between Lago Ercina and Lago Enol, ± 1000 m above Covadonga (Picos de Europa, Cantabrian Mountains, Spain). On 14-VIII-1961 from one of the salamanders two young were born (length 40 and 45 mm). Only one specimen

  15. Das Waldenserbekenntnís von Chanforan 1532 - ein reformiertes ...

    African Journals Online (AJOL)

    Herzog (1835:380) bemangelte noch das Fehlen der Thesen 6 bis 8 in der Dub liner Handschrift. Doch zeigt die sorgfaltige Wiedergabe des Textes durch V Vinay,. daB der Schreiber lediglich vergessen hat, die Thesen 3 und 4, wie auch die These. 21 zu markieren. Die Zahlung ist leicht einzufiigen, wie unten gezeigt wird.

  16. Book review

    African Journals Online (AJOL)

    Book review. * Dr Birgit Schreiber is the Director of the Centre for Student Support Services at the University of the. Western Cape, Cape Town, South Africa. Email: bschreiber@uwc.ac.za. Manuel Castells (2001), who is regarded as one of the most influential social scientists commenting on the role of higher education in ...

  17. Genetic Background and Environment Influence the Effects of Mutations in pykF and Help Reveal Mechanisms Underlying Their Benefit

    Science.gov (United States)

    2015-08-01

    1192. Christofk, H. R., M. G. Vander Heiden, M. H. Harris , A. Ramanathan, R. E. Gerszten, R. Wei, M. D. Fleming, S. L. Schreiber, and L. C. Cantley...with bacterial populations. Proc. Natl. Acad. Sci. USA 91:6808–6814. Lieberman, T. D., J. B. Michel, M. Aingaran, G. Potter -Bynoe, D. Roux, M. R. Davis

  18. Differential expression of PARP1 mRNA in leucocytes of patients ...

    Indian Academy of Sciences (India)

    myocardial infarction and ischaemia, which are characterized predominantly by programmed-necrotic cell death (Jagtap and Szabo 2005; Schreiber et al. 2006). Kannan et al. (2011) showed the interaction of hairy/ enhancer of split1 (HES1) and PARP1 in B cell acute lym- phoblastic leukaemia (B-ALL). In effect, they report ...

  19. The co-curriculum: Re-defining boundaries of academic spaces

    African Journals Online (AJOL)

    Re-defining boundaries of academic spaces. Birgit Schreiber*. Co-curriculum seminar 2014. The University of the Western Cape, South Africa, invited two renowned speakers to address issues concerning the co-curriculum in a colloquium on 14 May 2014 entitled. “The co-curriculum: An integrated practice or fragments at ...

  20. ‘Cultural encounters: Western scholarship and Fang statuary from Equatorial Africa’ [Inaugural address, delivered on the acceptance of an extraordinary professorship at Tilburg University, Netherlands, in 2011

    Directory of Open Access Journals (Sweden)

    Wilfried van Damme

    2014-12-01

    Full Text Available In this inaugural address, delivered on the acceptance of an extraordinary professorship at Tilburg University, Netherlands, in 2011, Wilfried van Damme examines three approaches that have been characteristically applied within the Western anthropology of art during the last half century. Illustrating these approaches with reference to the study of Fang statuary from equatorial Africa, he discusses a stylistic approach, focusing on anatomical details and proportions of Fang anthropomorphic sculptures; a culturalist approach, highlighting the local meaning and values these sculptures express; and a postcolonial approach, dealing with the Western appropriation and commodification of Fang statues.

  1. Swedish Masters of Modernism: A Review of Nicholas Adams, Gunnar Asplund’s Gothenburg: The Transformation of Public Architecture in Interwar Europe, and Janne Ahlin, Sigurd Lewerentz, Architect 1885–1975

    Directory of Open Access Journals (Sweden)

    Peter Blundell Jones

    2015-09-01

    Full Text Available Nicholas Adams, Gunnar Asplund’s Gothenburg: The Transformation of Public Architecture in Interwar Europe, University Park: Penn State University Press, 288 pages, 152 illustrations, 2014, ISBN: 978-0-271-05984-6 Janne Ahlin, Sigurd Lewerentz, Architect 1885–1975, with an epilog by Wilfried Wang, Zürich: Park Books, 204 pages, 29 colour and 307 b/w illustrations, plans and drawings, 2014, ISBN: 978-3-906027-48-7, (facsimile of the original edition by Byggförlaget, Stockholm and MIT Press, Cambridge MA, 1987

  2. Hilbert's programs and beyond

    CERN Document Server

    2013-01-01

    David Hilbert was one of the great mathematicians who expounded the centrality of their subject in human thought. In this collection of essays, Wilfried Sieg frames Hilbert's foundational work, from 1890 to 1939, in a comprehensive way and integrates it with modern proof theoretic investigations. Ten essays are devoted to the analysis of classical as well as modern proof theory; three papers on the mathematical roots of Hilbert's work precede the analytical core, and three final essays exploit an open philosophical horizon for reflection on the nature of mathematics in the 21st century.

  3. LHCb experiment magnets

    CERN Multimedia

    Maximilien Brice

    2004-01-01

    The leading members of the LHCb magnet project, from left to right: Pierre-Ange Giudici, who organized and supervised the industrial production of the coils; Marcello Losasso, who performed the 3D calculations to optimise the magnetic field; Olivier Jamet, responsible for the 3D design; Jean Renaud, in charge of the magnet assembly, and Wilfried Flegel, project leader. The LHCb detector will investigate matter-antimatter differences in B mesons at the LHC. The coils of the detector's huge dipole magnet are seen here in April 2004.

  4. Acoustofluidics 14: Applications of acoustic streaming in microfluidic devices.

    Science.gov (United States)

    Wiklund, Martin; Green, Roy; Ohlin, Mathias

    2012-07-21

    In part 14 of the tutorial series "Acoustofluidics--exploiting ultrasonic standing wave forces and acoustic streaming in microfluidic systems for cell and particle manipulation", we provide a qualitative description of acoustic streaming and review its applications in lab-on-a-chip devices. The paper covers boundary layer driven streaming, including Schlichting and Rayleigh streaming, Eckart streaming in the bulk fluid, cavitation microstreaming and surface-acoustic-wave-driven streaming.

  5. Orthogonal tensor decompositions

    Energy Technology Data Exchange (ETDEWEB)

    Tamara G. Kolda

    2000-03-01

    The authors explore the orthogonal decomposition of tensors (also known as multi-dimensional arrays or n-way arrays) using two different definitions of orthogonality. They present numerous examples to illustrate the difficulties in understanding such decompositions. They conclude with a counterexample to a tensor extension of the Eckart-Young SVD approximation theorem by Leibovici and Sabatier [Linear Algebra Appl. 269(1998):307--329].

  6. Did the 1982-1983 El Niño-Southern Oscillation Affect Seabirds in Alaska?

    Science.gov (United States)

    Hatch, Scott A.

    1987-01-01

    The causes and effects of the oceanographic and atmospheric phenomena known as El Nino and the Southern Oscillation (ENSO) have been studied intensively in recent years (Cane 1983, Rasmusson and Wallace 1983, Barber and Chave 1983, Cane and Zebiak 1985). ENSOs occur at semiregular intervals of 3-4 years, and the stronger events have important biological consequences, including reduced breeding success and survival of seabirds in the central and eastern tropical Pacific Boersma 1978, Barber and Chavez 983, Schreiber and Schreiber 1984, Duffy 1986). The ENSO event of 1982-1983 was perhaps the strongest of this century Cane 1983), and there is evidence that seabird populations as far north as the Oregon coast (42-46'N) were adversely affected (Hodder and Graybill 1985, Bayer 1986). Here I examine evidence for similar effects on seabirds along the Alaskan coast.

  7. Role of Activin A in Immune Response to Breast Cancer

    Science.gov (United States)

    2015-12-01

    The efficacy of radiotherapy relies upon induction of type i interferon- dependent innate and adaptive immunity . Cancer Res 2011;71:2488–96. 15...therapy: a paradigm shift. J Natl Cancer Inst 2013;105:256–65. 46. Gajewski TF, Schreiber H, Fu YX. Innate and adaptive immune cells in the tumor...associated olecular pattern (DAMP) molecules that alert the immune system f a potential threat, activating both innate and adaptive immunity 1]. However

  8. RLE Progress Report Number 122.

    Science.gov (United States)

    1980-01-01

    Edward R. Gruberg, Keith Grasse [Keith Grasse is with the Department of Psychology, Dalhousie University, Halifax, Nova Scotia.] We have begun...Field of a Pulsed Relativistic Magnetron (Phys. Fluids 22, 1584-1586 (1979)) D.E. Troxel, W.F. Schreiber, P. Curlander, A. Gilkes, R. Grass , and G. Hoover...Perry E. Lattes, Ana Luisa Becher, Charles E. Habashy, Tarek M. Laughlin, Robert B. Bennett, Charles L. Hackel, Richard P. Lawrence, Charles R. Bezdjian

  9. On the Potential Use of the Terminal Doppler Weather Radar Gust Front Detection Algorithm on the WSR-88D System. Part II: Detecting Non-gust Front Convergent Weather Phenomena

    Science.gov (United States)

    1991-10-01

    convergence lines collide with other lines or with old thunderstorms (Wilson and Schreiber, 1986). In a similar instance, Roberts and Wilson (1989) show a...vary in width, depth, length, strength, and location within a synoptic-scale storm ( Houze , et al., 1976). Rain and snow bands, for instance, are...of a warm frontal region. J. Atmos. Sci., 36, 2093-2107. Houze , R. A., P. V. Hobbs, K. Biswas, W. M. Davis, 1976: Mesoscale rain bands in extratropical

  10. On the Potential Use of the Terminal Doppler Weather Radar Gust Front Detection Algorithm on the WSR-88D System. Part 2: Detecting Non-Gust Front Convergent Weather Phenomena

    Science.gov (United States)

    1991-10-01

    Wilson and Schreiber, 1986). In a similar instance, Roberts and Wilson (1989) show a DCVZ case where a terrain induced boundary dissipated (presumably...enhanced precipitation are commonly observed and they can vary in width, depth, length, strength, and location within a synoptic-scale storm ( Houze , et al...Doppler radar study of a warm frontal region. J. Atmos. Sci., 36, 2093-2107. Houze , R. A., P. V. Hobbs, K. Biswas, W. M. Davis, 1976: Mesoscale rain bands

  11. Employment and the Welfare State: A Continental Dilemma

    OpenAIRE

    Scharpf, Fritz W.

    1997-01-01

    Estimates of the comparative health of the North Americanand Western European economies and societies have had their fashion cycles -from Servain-Schreiber's warnings that Europe was falling behind, rather thancatching up with, American technological leadership in the 1960s, to Europeanexasperation over American trade and budget deficits in the 1970s, to anxietiesover Eurosclerosis in the early 1980s and over the American loss ofinternational competitiveness in the late 1980s. Presently, by a...

  12. Buchbesprechungen

    OpenAIRE

    1987-01-01

    Rezensionen folgender Werke: Pohlmeier, H. /Deutsch, E./Schreiber, H.-L. (Hrsg.) (1986): Forensische Psychiatrie heute. Berlin. Müller, C. (Hrsg) (1986) Lexikon der Psychiatrie, 2. neubearb. u. erw. Aufl. Berlin. Franke, U. Artikulationstherapie bei Vorschulkindern. München. Speck, O. u.a. (Hrsg) Kindertherapie. Interdisziplinare Beitrage aus Forschung und Praxis. München. Jaeggi, E. (1986) Wir Menschenbummler. Autobiographie einer Psychotherapeutin. München. Lasch, ...

  13. Contextualizing Flow in Games

    OpenAIRE

    John, Salisbury; Penda, Tomlinson

    2014-01-01

    Flow, the concept developed by Mihaly Csikszentmihalyi over the last forty years or so (see Csikszentmihalyi 1975) has been invoked quite often with respect to the way players engage with digital games (e.g. Baron 2012; Cowley et al. 2008; Sweetser and Wyeth 2005; Brathwaite & Schreiber, 2009; Fullerton, Swain, & Hoffman, 2008; Schell, 2008). However Kubey & Csikszentmihalyi (2002) argue that ‘video games’ are in fact likely to promote undesirable experiences of a kind Csikszentmihalyi refers...

  14. Reconciling Csikszentmihalyi’s Broader Flow Theory: With Meaning and Value in Digital Games

    OpenAIRE

    Tomlinson, Penda; Salisbury, John Hamon

    2016-01-01

    Flow, the concept developed by Mihaly Csikszentmihalyi over the last forty years or so (see Csikszentmihalyi 1975) has been invoked quite often with respect to the way players engage with digital games (e.g. Baron 2012; Cowley et al. 2008; Sweetser and Wyeth 2005; Brathwaite & Schreiber, 2009; Fullerton, Swain, & Hoffman, 2008; Schell, 2008). However, Kubey & Csikszentmihalyi (2002) have argued that ‘video games’ are in fact likely to promote undesirable experiences of a kind Csikszentmihalyi...

  15. Tank 241-T-203, core 190 analytical results for the final report

    Energy Technology Data Exchange (ETDEWEB)

    Steen, F.H.

    1997-08-05

    This document is the analytical laboratory report for tank 241-T-203 push mode core segments collected on April 17, 1997 and April 18, 1997. The segments were subsainpled and analyzed in accordance with the Tank 241-T-203 Push Mode Core Sampling andanalysis Plan (TSAP) (Schreiber, 1997a), the Safety Screening Data Quality Objective (DQO)(Dukelow, et al., 1995) and Leffer oflnstructionfor Core Sample Analysis of Tanks 241-T-201, 241-T-202, 241-T-203, and 241-T-204 (LOI)(Hall, 1997). The analytical results are included in the data summary report (Table 1). None of the samples submitted for Differential Scanning Calorimetry (DSC), Total Alpha Activity (AT) and Total Organic Carbon (TOC) exceeded notification limits as stated in the TSAP (Schreiber, 1997a). The statistical results of the 95% confidence interval on the mean calculations are provided by the Tank Waste Remediation Systems (TWRS) Technical Basis Group in accordance with the Memorandum of Understanding (Schreiber, 1997b) and not considered in this report.

  16. Table Tennis Club

    CERN Multimedia

    Table Tennis Club

    2012-01-01

    The CERN Table Tennis club and the Meyrin CTT are organizing two Table Tennis workshops from 2 to 6 July and from 20 to 24 August 2012 inclusive in Meyrin. A professional would be with your children from 14.00 pm to 18.00 pm: an instructor J + S category A. Training courses with specific themes, individual courses would be given depending on the level of the child’s game, “discoveries –table tennis games” courses and games with the robot. Other activities (stretching, relaxation). Afternoons (from 18 to 20 children): 40 CHF per workshop and per child. Evenings (from 18 to 20 adults): 60 CHF per workshop and per adult. For further information, please contact Mr. Monteil : Mobile: (+33) 06 61 31 70 47 E-mail: wilfried.monteil@free.fr.

  17. Ideengeschichte der Physik

    CERN Document Server

    Kuhn, Wildfried

    2016-01-01

    Die Ideengeschichte der Physik geht neue Wege, indem sie den umfangreichen historischen Stoff nicht additiv darstellt, sondern wissenschaftstheoretisch reflektiert und nach thematischen Leitlinien (Materievorstellungen, Raum und Zeit, Erhaltungskonzepte, Extremalprinzipien, Theorie und Experiment) strukturiert. Damit vermittelt diese Darstellung im historischen Kontext ein tieferes Verständnis des physikalischen Denkens von der Antike bis heute und lotet zugleich die Dimension der Genesis physikalischer Begriffe aus, die in modernen Lehrbüchern zumeist nicht dargelegt wird. Das Credo Kuhns: Wer über die handwerkliche Handhabung von Physik hinausgehen will, muss sich zwingend mit der Frage befassen, was physikalisches Denken ausmacht und wie es entstanden ist. Die vorliegende zweite Auflage wurde ergänzt durch ein Vorwort von Prof. Dr. Oliver Schwarz, der im Institut Wilfried Kuhns forschen konnte und dabei dessen Denk- und Arbeitsweisen kennengelernt hat.

  18. The effect of solvation on the radiation damage rate constants for adenine

    DEFF Research Database (Denmark)

    Milhøj, Birgitte Olai; Sauer, Stephan P. A.

    2016-01-01

    It is a well known fact, that water plays an important part in almost all biological systems and that inclusion of solvation effects might therefore be of utmost importance in studies of radiation damage to DNA. In the present investigation we have studied the effect of different solvation models...... in calculations of Gibbs free energies and reaction rates for the reaction between the OH radical and the DNA nucleobase adenine using Density Functional Theory at the ωB97X-D/6-311++G(2df,2pd) level with the Eckart tunneling correction. The solvent, water, has been included through either the implicit...

  19. Hydrogen abstraction from CH3NH2, (CH3)2 NH, and (CH3)3 N by HO˙2 radicals: A theoretical study

    Science.gov (United States)

    Shi, J. C.; Shang, Y. L.; Du, S. Y.; Luo, S. N.

    2018-01-01

    Hydrogen abstraction from CH3NH2, (CH3)2 NH, and (CH3)3 N by HO˙2 radicals, is investigated via quantum chemistry calculations.The B3LYP/6-31G(2df, p) method is employed in geometry optimizations, frequencies, and intrinsic reaction coordinate calculations. The G4 method is applied in energy and thermodynamical property calculations. Rate constants are obtained from variation transition state theory and conventional transition state theory calculations with one-dimensional hindered rotor treatment and Eckart tunneling correction. A branching ratio analysis for each reaction system is further performed.

  20. 47{sup th} Annual meeting on nuclear technology (AMNT 2016). Key Topic / Outstanding know-how and sustainable excellence. Workshop: Preserving competence in nuclear technology

    Energy Technology Data Exchange (ETDEWEB)

    Steinwarz, Wolfgang

    2016-10-15

    On the 18{sup th} workshop Preserving Competence in Nuclear Technology 24 young scientists presented the scientific results from their work covering a broad spectrum of technical areas. This demonstrated again the strong engagement of the younger generation as part of the German nuclear society. Prof.Dr.-Ing. Eckart Laurin, Prof.Dr.-Ing. Marco K. Koch, Dr. Katharina Stummeyer, and Dr.-Ing. Wolfgang Steinwarz as members of the jury assessed the written compacts and the oral presentations to award the Siempelkamp Competence Price 2016 to Andreas Wanninger from Technische Universitaet Muenchen.

  1. Coordenadas cartesianas moleculares a partir da geometria dos modos normais de vibração Molecular cartesian coordinates from vibrational normal modes geometry

    Directory of Open Access Journals (Sweden)

    Emílio Borges

    2007-04-01

    Full Text Available A simple method to obtain molecular Cartesian coordinates as a function of vibrational normal modes is presented in this work. The method does not require the definition of special matrices, like the F and G of Wilson, neither of group theory. The Eckart's conditions together with the diagonalization of kinetic and potential energy are the only required expressions. This makes the present approach appropriate to be used as a preliminary study for more advanced concepts concerning vibrational analysis. Examples are given for diatomic and triatomic molecules.

  2. ΛCDM model with dissipative nonextensive viscous dark matter

    Science.gov (United States)

    Gimenes, H. S.; Viswanathan, G. M.; Silva, R.

    2018-03-01

    Many models in cosmology typically assume the standard bulk viscosity. We study an alternative interpretation for the origin of the bulk viscosity. Using nonadditive statistics proposed by Tsallis, we propose a bulk viscosity component that can only exist by a nonextensive effect through the nonextensive/dissipative correspondence (NexDC). In this paper, we consider a ΛCDM model for a flat universe with a dissipative nonextensive viscous dark matter component, following the Eckart theory of bulk viscosity, without any perturbative approach. In order to analyze cosmological constraints, we use one of the most recent observations of Type Ia Supernova, baryon acoustic oscillations and cosmic microwave background data.

  3. Higher holonomies: comparing two constructions

    DEFF Research Database (Denmark)

    Schaetz, Florian; Arias Abad, Camilo

    2015-01-01

    We compare two different constructions of higher-dimensional parallel transport. On the one hand, there is the two-dimensional parallel transport associated with 2-connections on 2-bundles studied by Baez–Schreiber [2], Faria Martins–Picken [11] and Schreiber–Waldorf [12]. On the other hand......, there are the higher holonomies associated with flat superconnections as studied by Igusa [7], Block–Smith [3] and Arias Abad–Schätz [1]. We first explain how by truncating the latter construction one obtains examples of the former. Then we prove that the two-dimensional holonomies provided by the two approaches...

  4. Streaming Induced by Ultrasonic Vibration in a Water Vessel

    Science.gov (United States)

    Nomura, Shinfuku; Murakami, Koichi; Sasaki, Yuuichi

    2000-06-01

    The flow pattern induced by ultrasonic vibration in a water vessel is investigated experimentally using several liquids. In tap water, vortex streaming of cavitation bubbles around the pressure node of a standing wave occurred because of the large number of cavitation bubbles generated by the ultrasonic vibration. Acoustic streaming of the Rayleigh type caused by cavitation bubble streaming is also induced in tap water. In a glycerin aqueous solution of 30%, Eckart streaming, which flowed upward from the vibrator, occurred due to the dissipation of ultrasonic energy caused by viscosity. On the other hand, in degassed water, streaming is hardly generated at all since a uniform and stable standing wave is formed in the water vessel. The velocity of the acoustic streaming generated in the water vessel by 27.8 kHz vibration is 1 to 6 mm/s. The cavitation bubble streaming in tap water is completely independent of normal Rayleigh or Eckart streaming. This bubble streaming is considerably faster than previous streaming.

  5. Controlling acoustic streaming in an ultrasonic heptagonal tweezers with application to cell manipulation.

    Science.gov (United States)

    Bernassau, A L; Glynne-Jones, P; Gesellchen, F; Riehle, M; Hill, M; Cumming, D R S

    2014-01-01

    Acoustic radiation force has been demonstrated as a method for manipulating micron-scale particles, but is frequently affected by unwanted streaming. In this paper the streaming in a multi-transducer quasi-standing wave acoustic particle manipulation device is assessed, and found to be dominated by a form of Eckart streaming. The experimentally observed streaming takes the form of two main vortices that have their highest velocity in the region where the standing wave is established. A finite element model is developed that agrees well with experimental results, and shows that the Reynolds stresses that give rise to the fluid motion are strongest in the high velocity region. A technical solution to reduce the streaming is explored that entails the introduction of a biocompatible agar gel layer at the bottom of the chamber so as to reduce the fluid depth and volume. By this means, we reduce the region of fluid that experiences the Reynolds stresses; the viscous drag per unit volume of fluid is also increased. Particle Image Velocimetry data is used to observe the streaming as a function of agar-modified cavity depth. It was found that, in an optimised structure, Eckart streaming could be reduced to negligible levels so that we could make a sonotweezers device with a large working area of up to 13 mm × 13 mm. Copyright © 2013 Elsevier B.V. All rights reserved.

  6. Influencia del contenido graso y de otras variables sobre la capacidad de fusión del queso Cremoso Argentino

    Directory of Open Access Journals (Sweden)

    Zalazar, Carlos A.

    2004-09-01

    Full Text Available The influence of the fat content, pH, the ripening degree and the incorporation of whey proteins, by two different methods, on the meltability of Cremoso Argentino cheese was examined. Different experimental cheeses were made at pilot plant scale and their meltabilities were determined by a modified Schreiber test. Ripening degree and fat content showed a good correlation with the meltability. Though, cheeses with incorporation of whey proteins showed poor meltability, despite their yields increased. No correlation was found between pH and meltability inside the pH working range studied.En el presente trabajo se estudió la influencia del contenido de materia grasa, pH, grado de maduración e incorporación de proteínas de suero mediante dos vías diferentes sobre la capacidad de fusión del queso Cremoso Argentino. Utilizando una técnica modificada del test de Schreiber se analizó la capacidad de fusión de distintos quesos experimentales elaborados a escala piloto. El contenido graso y el grado de maduración afectaron positivamente la capacidad de fusión. La incorporación de proteínas de suero produjo mayores rendimientos pero la capacidad de fusión se vio fuertemente disminuida. No se observó una influencia clara del pH dentro de los límites estudiados

  7. Helgoland und die Erforschung der marinen Benthosalgen

    Science.gov (United States)

    Mollenhauer, D.; Lüning, K.

    1988-09-01

    Early phycological research on the island of Helgoland was performed by amateur phycologists from the adjacent coastal regions of Germany (Bremen, Hamburg, Lower Saxony and Schleswig-Holstein). These pioneers were followed by professionals, and by collectors from the mainland universities, particularly from Berlin. This second phase group includes the naturalist Christian Gottfried Ehrenberg, the zoologists Johannes Müller, Ernst Haeckel and Anton Dohrn, and the botanists Alexander Braun, Nathanael Pringsheim, and Ferdinand Cohn. The leading marine phycologist in Germany, towards the end of the 19th century, was Johannes Reinke, who finally worked at the University of Kiel. Paul Kuckuck's doctoral thesis had been supervised by Reinke who recommended him for the post of the first curator of botany at the Biological Station of Helgoland, which was founded in 1892. Kuckuck worked on the island from 1892 to 1914. After World War I, and after Kuckuck's untimely death, Wilhelm Nienburg became the second curator of botany on Helgoland, from 1921 to 1923. The next permanent phycologist on the island, from 1925 to 1936, was Ernst Schreiber. He was followed in 1936 by Peter Kornmann, who retired in 1972 but still continues as a research worker, together with Paul-Heinz Sahling, who started to work as a technical assistant under the guidance of Ernst Schreiber in 1927.

  8. Kinetics and Thermodynamics of the Reaction between the (•)OH Radical and Adenine: A Theoretical Investigation.

    Science.gov (United States)

    Milhøj, Birgitte O; Sauer, Stephan P A

    2015-06-18

    The accessibility of all possible reaction paths for the reaction between the nucleobase adenine and the (•)OH radical is investigated through quantum chemical calculations of barrier heights and rate constants at the ωB97X-D/6-311++G(2df,2pd) level with Eckart tunneling corrections. First the computational method is validated by considering the hydrogen abstraction from the heterocyclic N9 nitrogen in adenine as a test system. Geometries for all molecules in the reaction are optimized with four different DFT exchange-correlation functionals (B3LYP, BHandHLYP, M06-2X, and ωB97X-D), in combination with Pople and Dunning basis sets, all of which have been employed in similar investigations in the literature. Improved energies are obtained through single point calculations with CCSD(T) and the same basis sets, and reaction rate constants are calculated for all methods both without tunneling corrections and with the Wigner, Bell, and Eckart corrections. In comparison to CCSD(T)//BHandHLYP/aug-cc-pVTZ reference results, the ωB97X-D/6-311++G(2df,2pd) method combined with Eckart tunneling corrections provides a sensible compromise between accuracy and time. Using this method, all subreactions of the reaction between adenine and the (•)OH radical are investigated. The total rate constants for hydrogen abstraction and addition for adenine are predicted with this method to be 1.06 × 10(-12) and 1.10 × 10(-12) cm(3) molecules(-1) s(-1), respectively. Abstractions of H61 and H62 contribute the most, while only addition to the C8 carbon is found to be of any significance, in contrast to previous claims that addition is the dominant reaction pathway. The overall rate constant for the complete reaction is found to be 2.17 × 10(-12) cm(3) molecules(-1) s(-1), which agrees exceptionally well with experimental results.

  9. APUAMA: a software tool for reaction rate calculations.

    Science.gov (United States)

    Euclides, Henrique O; P Barreto, Patricia R

    2017-06-01

    APUAMA is a free software designed to determine the reaction rate and thermodynamic properties of chemical species of a reagent system. With data from electronic structure calculations, the APUAMA determine the rate constant with tunneling correction, such as Wigner, Eckart and small curvature, and also, include the rovibrational level of diatomic molecules. The results are presented in the form of Arrhenius-Kooij form, for the reaction rate, and the thermodynamic properties are written down in the polynomial form. The word APUAMA means "fast" in Tupi-Guarani Brazilian language, then the code calculates the reaction rate on a simple and intuitive graphic interface, the form fast and practical. As program output, there are several ASCII files with tabulated information for rate constant, rovibrational levels, energy barriers and enthalpy of reaction, Arrhenius-Kooij coefficient, and also, the option to the User save all graphics in BMP format.

  10. Path integral solution for a Klein–Gordon particle in vector and scalar deformed radial Rosen–Morse-type potentials

    Science.gov (United States)

    Khodja, A.; Kadja, A.; Benamira, F.; Guechi, L.

    2017-12-01

    The problem of a Klein-Gordon particle moving in equal vector and scalar Rosen-Morse-type potentials is solved in the framework of Feynman's path integral approach. Explicit path integration leads to a closed form for the radial Green's function associated with different shapes of the potentials. For q≤-1, and 1/2α ln | q|wave functions are deduced for the l states using an appropriate approximation to the centrifugal potential term. When -10, it is shown that the quantization conditions for the bound state energy levels E_{nr} are transcendental equations which can be solved numerically. Three special cases such as the standard radial Manning-Rosen potential (| q| =1), the standard radial Rosen-Morse potential (V2→ -V2,q=1) and the radial Eckart potential (V1→ -V1,q=1) are also briefly discussed.

  11. Dissipative generalized Chaplygin gas as phantom dark energy

    Energy Technology Data Exchange (ETDEWEB)

    Cruz, Norman [Departamento de Fisica, Facultad de Ciencia, Universidad de Santiago, Casilla 307, Santiago (Chile)]. E-mail: ncruz@lauca.usach.cl; Lepe, Samuel [Instituto de Fisica, Facultad de Ciencias Basicas y Matematicas, Pontificia Universidad Catolica de Valparaiso, Avenida Brasil 2950, Valparaiso (Chile)]. E-mail: slepe@ucv.cl; Pena, Francisco [Departamento de Ciencias Fisicas, Facultad de Ingenieria, Ciencias y Administracion, Universidad de la Frontera, Avda. Francisco Salazar 01145, Casilla 54-D, Temuco (Chile)]. E-mail: fcampos@ufro.cl

    2007-03-15

    The generalized Chaplygin gas, characterized by the equation of state p=-A/{rho}{sup {alpha}}, has been considered as a model for dark energy due to its dark-energy-like evolution at late times. When dissipative processes are taken into account, within the framework of the standard Eckart theory of relativistic irreversible thermodynamics, cosmological analytical solutions are found. Using the truncated causal version of the Israel-Stewart formalism, a suitable model was constructed which crosses the w=-1 barrier. The future-singularities encountered in both approaches are of a new type, and not included in the classification presented by Nojiri and Odintsov [S. Nojiri, S.D. Odintsov, Phys. Rev. D 72 (2005) 023003].

  12. Bulk and shear viscosity in Hagedorn fluid

    Energy Technology Data Exchange (ETDEWEB)

    Tawfik, A.; Wahba, M. [Egyptian Center for Theoretical Physics (ECTP), MTI University, Faculty of Engineering, Cairo (Egypt)

    2010-11-15

    Assuming that the Hagedorn fluid composed of known particles and resonances with masses m <2 GeV obeys the first-order theory (Eckart) of relativistic fluid, we discuss the transport properties of QCD confined phase. Based on the relativistic kinetic theory formulated under the relaxation time approximation, expressions for bulk and shear viscosity in thermal medium of hadron resonances are derived. The relaxation time in the Hagedorn dynamical fluid exclusively takes into account the decay and eventually van der Waals processes. We comment on the in-medium thermal effects on bulk and shear viscosity and averaged relaxation time with and without the excluded-volume approach. As an application of these results, we suggest the dynamics of heavy-ion collisions, non-equilibrium thermodynamics and the cosmological models, which require thermo- and hydro-dynamics equations of state. (Abstract Copyright [2010], Wiley Periodicals, Inc.)

  13. Bulk viscosity, interaction and the viability of phantom solutions

    CERN Document Server

    Leyva, Yoelsy

    2016-01-01

    We study the dynamics of a bulk viscosity model in the Eckart approach for a spatially flat Friedmann-Robertson-Walker (FRW) universe. We have included radiation and dark energy, assumed as perfect fluids, and dark matter treated as an imperfect fluid having bulk viscosity. We also introduce an interaction term between the dark matter and dark energy components. Considering that the bulk viscosity is proportional to the dark matter energy density and imposing a complete cosmological dynamics, we find bounds on the bulk viscosity in order to reproduce a matter-dominated era (MDE). This constraint is independent of the interaction term. Some late time phantom solutions are mathematically possible. However, the constraint imposed by a MDE restricts the interaction parameter, in the phantom solutions, to a region consistent with a null value, eliminating the possibility of late time stable solutions with $w<-1$. From the different cases that we study, the only possible scenario, with bulk viscosity and interac...

  14. Lectures on quantum mechanics

    CERN Document Server

    Weinberg, Steven

    2013-01-01

    Nobel Laureate Steven Weinberg combines his exceptional physical insight with his gift for clear exposition to provide a concise introduction to modern quantum mechanics. Ideally suited to a one-year graduate course, this textbook is also a useful reference for researchers. Readers are introduced to the subject through a review of the history of quantum mechanics and an account of classic solutions of the Schrödinger equation, before quantum mechanics is developed in a modern Hilbert space approach. The textbook covers many topics not often found in other books on the subject, including alternatives to the Copenhagen interpretation, Bloch waves and band structure, the Wigner–Eckart theorem, magic numbers, isospin symmetry, the Dirac theory of constrained canonical systems, general scattering theory, the optical theorem, the 'in-in' formalism, the Berry phase, Landau levels, entanglement and quantum computing. Problems are included at the ends of chapters, with solutions available for instructors at www.cam...

  15. Searching for a question and an answer

    Directory of Open Access Journals (Sweden)

    J. Le Roux

    2012-02-01

    Full Text Available This article focusses on Eckart Otto’s theory of the Pentateuch, his contribution to Pro Pent (the “Project for the study of the Pentateuch” and his influence on our understanding of the first five books of the Hebrew Bible. There was something in his thinking that appealed to many South African scholars; an appeal that softened down the harsh criticism and blunted the sharp edges of Pentateuch study of the past two centuries. And this was accomplished by turning the focus to the theological and ethical issues, which were the driving forces behind the formation of the Pentateuch. Put differently: to show the Pentateuch as an answer to a question and Pentateuch criticism as a constant search for the questions to which the Pentateuch is answer.

  16. Deuteronomy between Pentateuch and the Deuteronomistic history

    Directory of Open Access Journals (Sweden)

    John van Seters

    2003-11-01

    Full Text Available The problem of how Deuteronomy relates to the Pentateuch and to the book of Joshua came to the fore with Noth’s thesis of a Deuteronomistic History, which was in conflict with the earlier support for a Hexateuch in the Documentary Hypothesis. With the current decline of the Documentary Hypothesis, one approach is to give greater emphasis to Pentateuchal and Hexateuchal redactors, often in place of the J and P sources, which either use Deuteronomy to conclude the Pentateuch or to build a bridge to the Deuteronomistic History. An alternative view, expressed in this paper, rejects the notion of such redactors and sees J and P as later than, and supplementary to, the Deuteronomistic History. To support this view, the article will examine Eckart Otto’s Pentateuchal redactor in Deuteronomy 4, at parallel texts in Numbers and Deuteronomy, and at Pentateuchal and Hexateuchal redactors in Deuteronomy 34 and Joshua 24.

  17. Tunneling Flight Time, Chemistry, and Special Relativity.

    Science.gov (United States)

    Petersen, Jakob; Pollak, Eli

    2017-09-07

    Attosecond ionization experiments have not resolved the question "What is the tunneling time?". Different definitions of tunneling time lead to different results. Second, a zero tunneling time for a material particle suggests that the nonrelativistic theory includes speeds greater than the speed of light. Chemical reactions, occurring via tunneling, should then not be considered in terms of a nonrelativistic quantum theory calling into question quantum dynamics computations on tunneling reactions. To answer these questions, we define a new experimentally measurable paradigm, the tunneling flight time, and show that it vanishes for scattering through an Eckart or a square barrier, irrespective of barrier length or height, generalizing the Hartman effect. We explain why this result does not lead to experimental measurement of speeds greater than the speed of light. We show that this tunneling is an incoherent process by comparing a classical Wigner theory with exact quantum mechanical computations.

  18. The formation of highly oxidized multifunctional products in the ozonolysis of cyclohexene

    DEFF Research Database (Denmark)

    Rissanen, Matti P.; Kurtén, Theo; Sipilä, Mikko

    2014-01-01

    Eckart tunneling corrections. The complementary investigation methods gave a consistent picture of a formation mechanism advancing by peroxy radical (RO2) isomerization through intramolecular hydrogen shift reactions, followed by sequential O2 addition steps, that is, RO2 autoxidation, on a time scale...... mechanism. Deuterated cyclohexene ozonolysis resulted in a less oxidized product distribution with a lower yield of highly oxygenated products and cis-6-nonenal ozonolysis generated the same monomer product distribution, consistent with the proposed mechanism and in agreement with quantum chemical modeling.......The prompt formation of highly oxidized organic compounds in the ozonolysis of cyclohexene (C6H10) was investigated by means of laboratory experiments together with quantum chemical calculations. The experiments were performed in borosilicate glass flow tube reactors coupled to a chemical...

  19. Ab initio calculations and mechanism of two proton migration reactions of ethoxy radical

    Science.gov (United States)

    Zhang, Yue; Zhang, Shaowen; Li, Qian Shu

    2005-01-01

    We present a direct ab initio and density functional theory dynamics study of the thermal rate constants of the two H-migration reactions of C 2H 5O radical. MPW1K/6-31+G(d,p) methods were employed to optimize the geometries of all stationary points and to calculate the minimum energy path (MEP). The energies of all the stationary points were refined at the QCISD(T)/aug-cc-pVTZ level of theory. The thermal gas phase rate constants were evaluated based on the energetics from the QCISD(T)/aug-cc-pVTZ//MPW1K/6-31+G(d,p) level of theory using both microcanonical variational transition state theory (μVT) and canonical variational transition state theory (CVT) with the Eckart tunneling correction in the temperature range of 200-2500 K. The extended Arrhenius expression fitted from the μVT/Eckart rate constants of 1,2 H-shift and 1,3 H-shift reactions of C 2H 5O radical in the temperature range of 200-2500 K are k = 3.90 × 10 -31T12.4e (-2.13 × 10 3/ T) and k = 2.83 × 10 -29T11.9e (-2.24 × 10 3/ T) s -1, respectively. The two isomerization rate constants exhibited positive temperature dependence in the calculated temperature region. The variational effects for the two isomerizations of ethoxy radical are small and the tunneling effects are important in the low temperature range. The titled reactions are minor and not essential compared to the decomposition pathways of ethoxy radical.

  20. Re-reading Riegl

    Directory of Open Access Journals (Sweden)

    Matthew Rampley

    2011-12-01

    Full Text Available Review of: Peter Noever, Artur Rosenauer and Georg Vasold, eds, Alois Riegl Revisited. Beiträge zu Werk und Rezeption. Contributions to the Opus and its Reception. Vienna: Österreichische Akademie der Wissenschaften, 2010. Michael S. Falser, Wilfried Lipp, Andrzek Tomaszewski, eds, Conservation and Preservation. Interactions between Theory and Practice. In Memoriam Alois Riegl (1858-1905. Proceedings of the International Conference of the ICOMOS International Scientific Committee for the Theory and the Philosophy of Conservation and Restoration, 23-27 April 2008, Vienna. Florence: Polistampa, 2010. This review examines two recent publications concerned with the legacy of Alois Riegl. It considers these books as examples of the changing landscape of Riegl scholarship, in which the traditional concern with issues of methodology (notably the meaning and function of Riegl’s concept of the Kunstwollen has given way to an engagement with his place in the wider cultural and academic politics of the Habsburg Empire. The review examines Riegl’s engagement with disciplines such as national economy, ethnology, Islamic studies and archaeology.

  1. Energy efficiency in the waste water system; Energieeffizienz im Abwasserbereich

    Energy Technology Data Exchange (ETDEWEB)

    Panckow, Kathrin; Wienke, Andreas (comps.)

    2008-08-15

    The volume 51 of the publication series of the Municipal Environmental Campaign U.A.N. (Hannover, Federal Republic of Germany) reports on the energy efficiency in the waste water section. This volume consists of the following contributions: (a) How much energy is necessary for the sewage plant? (Artur Mennerich); (b) Possibilities of energy saving in the sewer system (Wolfgang Buehler); (c) Possibilities of energy saving at sewage plants: a Survey (Ulf Theilen); (d) Possibilities of energy saving at sewage plants: Examples from the practice (Wilfried Osterloh); (e) Review of the possibilities of power generation at sewage plants (K.-H. Rosenwinkel, Linda Hinken); (f) Potentials of production and utilization of fouling gas (Johannes Mueller); (g) Realisation of a 5 MW biological gas facility with waste heat utilization for sewage sludge drying (Marc Stueben); (h) The micro gas turbine: An alternative for the compact cogeneration plant (Christian Schaum); (i) PR report: Energy efficiency - (rational utilization of energy), energy concepts - (analysis of energy, strategic perspectives) (Martin Mergelmeyer, Gerhard Seibert-Erling).

  2. The LHCb magnet design team

    CERN Multimedia

    Maximilien Brice

    2003-01-01

    Photos 01, 02: The LHCb magnet is equipped with resistive coils. Having a "warm " rather than a superconducting magnet, as was originally planned, was a design choice advocated by former Technical Coordinator Hans-Jurgen Hilke. Although this solution was adopted to keep the experiment on budget and on schedule, the geometry required and the need for good lateral homogeneity of the magnetic field called for an innovative design, developed by Wilfried Flegel. Jacques André, Claude Rosset and Olivier Jamet were responsible for the working drawings while Marcello Losasso did the 3-D calculations of the magnetic field. The LHCb magnet design team is pictured in front of one of the two magnet coils which recently arrived at CERN. Each coil comprises 15 individual monolayer ´pancakes´ of identical trapezoidal racetrack shape, and is bent at 45 degrees on the two transverse sides. Each pancake consists of 15 turns of conductor, wound from a 300-m length of extruded aluminium. Left to right: Olivier Jamet, Hans-Jur...

  3. Optimizing pain control through the use of implantable pumps

    Directory of Open Access Journals (Sweden)

    Boris Todoroff

    2008-10-01

    Full Text Available Wilfried Ilias1, Boris Todoroff21Dept Anesthesiology, Intensive Care Medicine and Pain Therapy, Academic Teaching Hospital St. John of God, Vienna, Austria; 2Dept. Plastic and Reconstructive Surgery, Hospital of St. Vincent, Vienna, AustriaAbstract: Intrathecal therapy represents an effective and well established treatment of nonmalignant as well as malignant pain. Devices available include mechanical constant flow pumps as well as electronic variable flow pumps with patient-controlled bolus release. The latter provide faster dose finding, individual pain control, and good acceptance by patients. New technologies such as membrane pumps and rechargeable devices are expected to be developed to clinical perfection. The available drugs for intrathecal therapy are listed according to the polyanalgesic consensus on intrathecal therapy. The integration of remote patient-controlled analgesia into electronic implantable devices, and the peptide analgesic ziconotide, have significantly improved intrathecal therapy. Complications include infections, catheter ruptures or disconnections, catheter granulomas, and technical dysfunctions. Further possibilities for optimizing intrathecal therapy include development of new drugs, drug side effects, catheter and pump technologies, and surgical techniques.Keywords: intrathecal therapy, implantable pumps, morphine pumps, intrathecal drugs, intrathecal catheters, intrathecal pain control

  4. Tank 241-T-105, cores 205 and 207 analytical results for the final report

    Energy Technology Data Exchange (ETDEWEB)

    Esch, R. A.

    1997-10-21

    This document is the final laboratory report for tank 241-T-105 push mode core segments collected between June 24, 1997 and June 30, 1997. The segments were subsampled and analyzed in accordance with the {ital Tank Push Mode Core Sampling and Analysis Plan} (TSAP) (Field,1997), the {ital Tank Safety Screening Data Quality Objective} (Safety DQO) (Dukelow, et al., 1995) and {ital Tank 241-T-105 Sample Analysis} (memo) (Field, 1997a). The analytical results are included in Table 1. None of the subsamples submitted for the differential scanning calorimetry (DSC) analysis or total alpha activity (AT) exceeded the notification limits as stated in the TSAP (Field, 1997). The statistical results of the 95% confidence interval on the mean calculations are provided by the Tank Waste Remediation Systems (TWRS) Technical Basis Group in accordance with the Memorandum of Understanding (Schreiber, 1997) and not considered in this report.

  5. Absorption Spectrum and Density of States of Square, Rectangular, and Triangular Frenkel Exciton Systems with Gaussian Diagonal Disorder

    Directory of Open Access Journals (Sweden)

    Ibrahim Avgin

    2017-01-01

    Full Text Available Using the coherent potential approximation, we investigate the effects of disorder on the optical absorption and the density of states of Frenkel exciton systems on square, rectangular, and triangular lattices with nearest-neighbor interactions and a Gaussian distribution of transition energies. The analysis is based on an elliptic integral approach that gives results over the entire spectrum. The results for the square lattice are in good agreement with the finite-array calculations of Schreiber and Toyozawa. Our findings suggest that the coherent potential approximation can be useful in interpreting the optical properties of two-dimensional systems with dominant nearest-neighbor interactions and Gaussian diagonal disorder provided the optically active states are Frenkel excitons.

  6. VizieR Online Data Catalog: SDSS WD main-sequence binaries. XII. (Nebot Gomez-Moran+, 2011)

    Science.gov (United States)

    Nebot Gomez-Moran, A.; Gaensicke, B. T.; Schreiber, M. R.; Rebassa-Mansergas, A.; Schwope, A. D.; Southworth, J.; Aungwerojwit, A.; Bothe, M.; Davis, P. J.; Kolb, U.; Mueller, M.; Papadaki, C.; Pyrzas, S.; Rabitz, A.; Rodriguez-Gil, P.; Schmidtobreick, L.; Schwarz, R.; Tappert, C.; Toloza, O.; Vogel, J.; Zorotovic, M.

    2013-02-01

    Table3.dat lists only radial velocities used for the identification of the binary as a close or wide binary candidate. Table4.dat contains the total number of spectra used for identification of the binary, the number of spectra from own spectroscopic follow-up observations and the statistical significance of the radial velocity variations. Table6.dat list radial velocities limited to the spectra used for the determination of the orbital period. Stellar parameters have been taken from Rebassa-Mansergas et al (2010, Cat., J/MNRAS/402/620, 2011, in prep.). Some radial velocities have already been published in Schreiber et al. (2008A&A...484..441S, 2010A&A...513L...7S) (5 data files).

  7. Tank 241-AX-103, cores 212 and 214 analytical results for the final report

    Energy Technology Data Exchange (ETDEWEB)

    Steen, F.H.

    1998-02-05

    This document is the analytical laboratory report for tank 241-AX-103 push mode core segments collected between July 30, 1997 and August 11, 1997. The segments were subsampled and analyzed in accordance with the Tank 241-AX-103 Push Mode Core Sampling and Analysis Plan (TSAP) (Comer, 1997), the Safety Screening Data Quality Objective (DQO) (Dukelow, et al., 1995) and the Data Quality Objective to Support Resolution of the Organic Complexant Safety Issue (Organic DQO) (Turner, et al., 1995). The analytical results are included in the data summary table (Table 1). None of the samples submitted for Differential Scanning Calorimetry (DSC), Total Alpha Activity (AT), plutonium 239 (Pu239), and Total Organic Carbon (TOC) exceeded notification limits as stated in the TSAP (Conner, 1997). The statistical results of the 95% confidence interval on the mean calculations are provided by the Tank Waste Remediation Systems Technical Basis Group in accordance with the Memorandum of Understanding (Schreiber, 1997) and not considered in this report.

  8. The effect of age on Cheddar cheese melting, rheology and structure, and on the stability of feed for cheese powder manufacture

    DEFF Research Database (Denmark)

    Ray, Colin Andrew; Gholamhosseinpour, Aliakbar; Ipsen, Richard

    2016-01-01

    and small angle oscillation measurements. Results showed increasing stiffness and reduced activation energy for initiation of milk fat melting with age. Cheese feeds for manufacture of cheese powder were made, with or without emulsifying salts (ES), and analysed for emulsion stability. In the absence of ES......Age-related changes to the rheology and structure of Cheddar for cheese powder manufacture, and how this influences the stability of cheese feed during pre-spray-drying storage, were investigated. Cheddar cheese (3, 5, 7, 9, 12 and 15 months old) was analysed for meltability by the Schreiber Test......, feeds made from 3 month old Cheddar were significantly more stable than those made from 5 month old cheese. A similar significant increase in emulsion stability was observed for cheeses of 7 months of age compared with 12 months, indicating the necessity to use Cheddar cheese aged 3 months or less...

  9. O BSC COMO SUPORTE NO DIAGNÓSTICO ORGANIZACIONAL DE GESTÃO DO CONHECIMENTO PROPOSTO PELO COMMONKADS: POSSIBILIDADES E PONTOS CRÍTICOS

    Directory of Open Access Journals (Sweden)

    Cláudia V. Viegas

    2006-08-01

    Full Text Available O CommonKADS, modelo de Engenharia e Gestão do Conhecimento desenvolvido por Schreiber et al. (2002, concebe o conhecimento em relação ao propósito e ao contexto, focado na ação. Nesse sentido, atesta que entre os benefícios esperados de um sistema de conhecimento estão o aumento da rapidez e a melhoria da qualidade na tomada de decisão. No entanto, apresenta pouco suporte quanto a mensurações em seus passos iniciais, voltados à definição dos modelos da organização, do agente e da tarefa. Por isso, o presente artigo propõe a utilização do Balanced Scorecard (BSC - um sistema de avaliação de desempenho formulado por Kaplan e Norton (1997 que busca o equilíbrio entre indicadores financeiros e não-financeiros - como apoio às etapas iniciais do CommonKADS. Supõe-se que o BSC, por estar relacionado aos processos de formulação e implementação de estratégias necessárias à tomada de decisão, possa contemplar mais detalhadamente os propósitos preliminares do CommonKADS. O artigo também leva em consideração abordagens críticas ao BSC e a sua relação com a Gestão do Conhecimento, incorporando-as para atender de modo mais adequado a proposta de integração entre este sistema e o CommonKADS, concebido por Schreiber et al. (2002. Palavras-chave: CommonKADS. Balanced Scorecard. Gestão do Conhecimento. Estratégia.

  10. Acute effects of intrapulmonary percussive ventilation in COPD patients assessed by using conventional outcome parameters and a novel computational fluid dynamics technique

    Directory of Open Access Journals (Sweden)

    Ides K

    2012-09-01

    Full Text Available Kris Ides,1–3 Wim Vos,3,4 Lieve De Backer,2,3 Dirk Vissers,1,2 Rita Claes,2,3 Glenn Leemans,1,2 Kevin Ongena,1 Oswald Peters,5 Wilfried De Backer1–31Department of Health Science, Artesis University College of Antwerp, Merksem, 2Faculty of Medicine and Health Sciences, University of Antwerp, Wilrijk, 3Department of Respiratory Medicine, Antwerp University Hospital, Edegem, 4FluidDa.nv, Groeningerlei, Kontich, Belgium, 5AZ Monica, Antwerp, BelgiumObjective: Chest physiotherapy enhances sputum evacuation in COPD patients. It can be applied as a single technique or as a combination of techniques including intrapulmonary percussive ventilation (IPV. Recently developed assessment techniques may provide new insights into the effect of airway clearance techniques.Participants: Five moderate to severe COPD patients (three females and two males; mean forced expiratory volume in 1 second of 39.49% predicted who were admitted in the hospital for an acute exacerbation were included in this study.Methods: A novel imaging technique was used, together with other conventional techniques, to visualize the short-term effects of a single IPV treatment in COPD patients.Results: No significant changes were noted in the lung function parameters or arterial blood gases measured within 1 hour after the end of the IPV session. Computed tomography images detected changes in the airway patency after the IPV treatment compared with before treatment. Local resistances, calculated for the three-dimensional models, showed local changes in airway resistance.Conclusion: The effects of a single IPV session can be visualized by functional imaging. This functional imaging allows a calculation of changes in local airway resistance and local changes in airway volume in COPD patients without affecting conventional lung function parameters.Keywords: IPV, lung function, forced oscillation technique, physical therapy, airway clearance technique

  11. Energetic use of renewable fuels. Logistics of energy carrier supply, technologies of usage, boundary conditions for economically efficient use of biomass. Proceedings; Energetische Nutzung nachwachsender Rohstoffe. Logistik der Energietraegerbereitstellung, Technologien der Energietraegernutzung, Rahmenbedinungen fuer den wirtschaftlichen Einsatz von Biomasse. Vortraege

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2009-07-01

    Within the workshop of the Fraunhofer Institute for Manufacturing Engineering and Automation IPA (Stuttgart, Federal Republic of Germany) at 6th October, 2009, in Stuttgart the following lectures were held: (1) State of the art and perspectives of the utilization of renewable raw materials in Germany (Helmut Lamp); (2) The Act on Power Generation from Renewable Energy Sources (EEWaermeG) and the German Energy Saving Ordinance (ENEV) (Martin Maslaton); (3) Biomass: Procurement and logistics in Europe (Hubert Roeder); (4) Obstacles with the mobilization of wood from the private forest (Frank Setzer); (5) Environmental effects of the production of field wood - Evaluation of long-term investigations (Volkhard Scholz, Juergen Kern, Antje Balasus); (6) Potentials of biomass and renewable raw materials in Hungary (Istvan Hagen, Andrea Hangosi, Zsolt Tegla); (7) Regional energy concepts for the extension of biomass utilization using the bio energy region ''Saxonian Switzerland - Eastern Erzgebirge'' as an example'' (Burkhard Zschau); (8) Biomass - wooden ash circular process at Baden Wuerttemberg as an example (Klaus von Wilpert); (9) Launching of a bio ampere technology of wood gasification (Dietmar Bendix, Rolf Noppen); (10) Wood gas power plant Senden - transformation - optimization - technology (Matthias Vitek); (11) A general view of heating installations with wood fuels with a performance of up to 70 kW and additional components for the energetic and emission technical optimization (Wilfried Linke); (12) Financial incentives for the innovative reduction of dust emissions for biomass furnaces according to the 1st German Federal Immission Control Act (Andrej Stanev); (13) Alternative fuels in heat generation plants up to 1 MW (Thomas Hening); (14) Industrial-scale pellet systems in Germany (Stefan Weiner); (15) Supercritical reformation of energy sources to syngas (Yevgeny Makhynya, Stefan Peil, Dieter Bathen); (16) The GoBiGas (Gothenburg

  12. Oxidative stress and free radicals in COPD – implications and relevance for treatment

    Directory of Open Access Journals (Sweden)

    Domej W

    2014-10-01

    Full Text Available Wolfgang Domej,1 Karl Oettl,2 Wilfried Renner31Division of Pulmonology, Department of Internal Medicine, 2Institute of Physiological Chemistry, 3Clinical Institute of Medical and Chemical Diagnostics, Medical University of Graz, Graz, AustriaAbstract: Oxidative stress occurs when free radicals and other reactive species overwhelm the availability of antioxidants. Reactive oxygen species (ROS, reactive nitrogen species, and their counterpart antioxidant agents are essential for physiological signaling and host defense, as well as for the evolution and persistence of inflammation. When their normal steady state is disturbed, imbalances between oxidants and antioxidants may provoke pathological reactions causing a range of nonrespiratory and respiratory diseases, particularly chronic obstructive pulmonary disease (COPD. In the respiratory system, ROS may be either exogenous from more or less inhalative gaseous or particulate agents such as air pollutants, cigarette smoke, ambient high-altitude hypoxia, and some occupational dusts, or endogenously generated in the context of defense mechanisms against such infectious pathogens as bacteria, viruses, or fungi. ROS may also damage body tissues depending on the amount and duration of exposure and may further act as triggers for enzymatically generated ROS released from respiratory, immune, and inflammatory cells. This paper focuses on the general relevance of free radicals for the development and progression of both COPD and pulmonary emphysema as well as novel perspectives on therapeutic options. Unfortunately, current treatment options do not suffice to prevent chronic airway inflammation and are not yet able to substantially alter the course of COPD. Effective therapeutic antioxidant measures are urgently needed to control and mitigate local as well as systemic oxygen bursts in COPD and other respiratory diseases. In addition to current therapeutic prospects and aspects of genomic medicine, trending

  13. Full dimensional Franck-Condon factors for the acetylene ˜{A} 1Au—{˜{X}} {^1Σ _g^+} transition. II. Vibrational overlap factors for levels involving excitation in ungerade modes

    Science.gov (United States)

    Park, G. Barratt; Baraban, Joshua H.; Field, Robert W.

    2014-10-01

    A full-dimensional Franck-Condon calculation has been applied to the tilde{A} 1Au—tilde{X} ^1Σ _g^+ transition in acetylene in the harmonic normal mode basis. Details of the calculation are discussed in Part I of this series. To our knowledge, this is the first full-dimensional Franck-Condon calculation on a tetra-atomic molecule undergoing a linear-to-bent geometry change. In the current work, the vibrational intensity factors for levels involving excitation in ungerade vibrational modes are evaluated. Because the Franck-Condon integral accumulates away from the linear geometry, we have been able to treat the out-of-plane component of trans bend (ν _4^' ' }) in the linear tilde{X} state in the rotational part of the problem, restoring the χ Euler angle and the a-axis Eckart conditions. A consequence of the Eckart conditions is that the out-of-plane component of ν _4^' ' } does not participate in the vibrational overlap integral. This affects the structure of the coordinate transformation and the symmetry of the vibrational wavefunctions used in the overlap integral, and results in propensity rules involving the bending modes of the tilde{X} state that were not previously understood. We explain the origin of some of the unexpected propensities observed in IR-UV laser-induced fluorescence spectra, and we calculate emission intensities from bending levels of the tilde{A} state into bending levels of the tilde{X} state, using normal bending mode and local bending mode basis sets. Our calculations also reveal Franck-Condon propensities for the Cartesian components of the cis bend (ν _5^' ' }), and we predict that the best tilde{A}-state vibrational levels for populating tilde{X}-state levels with large amplitude bending motion localized in a single C-H bond (the acetylene↔vinylidene isomerization coordinate) involve a high degree of excitation in ν _6^' } (cis-bend). Mode ν _4^' } (torsion) populates levels with large amplitude counter-rotational motion of

  14. Assessment of mercury exposure and maternal-foetal transfer in Miniopterus schreibersii (Chiroptera: Miniopteridae) from southeastern Iberian Peninsula.

    Science.gov (United States)

    Lisón, Fulgencio; Espín, Silvia; Aroca, Bárbara; Calvo, José F; García-Fernández, Antonio J

    2017-02-01

    Mercury (Hg) is a highly toxic and widely distributed metal that is bioaccumulated in insectivorous mammals and may cause adverse effects on the reproductive system. Bats are considered excellent Hg bioindicators due to their wide distribution, life span, trophic position, metabolic rate and food intake. However, few studies have analysed Hg residues in bats, and to the best of our knowledge, no studies have been made in the Iberian Peninsula. The main aim of this study was to undertake the first ever assessment of Hg exposure in Schreiber's bent-winged bats inhabiting a natural cave in the southeast of Spain. The findings suggest that Schreiber's bent-winged bats in the sampling area are chronically exposed to low levels of Hg. The Hg concentrations found in different tissues (fur, kidney, liver, muscle and brain) were below the threshold levels associated with toxic effects in mammals. Non-gestating females showed Hg concentrations in the brain and muscle that doubled those found in gestating females. This could be due to Hg mobilization from the mother to the foetus in gestating females, although other factors could contribute to explain this result such as variations in hunting areas and the insect-prey consumed and/or different energetic needs and average food consumption during the breeding season. Hg levels were 1.7 times higher, although not significant, in foetus' brains than in the maternal brains, and Hg concentration in foetus' brain was significantly correlated with levels in the corresponding mothers' kidney. These results suggest that there could be an active mother-to-foetus transfer of Hg in bats, which would be of special relevance in a scenario of higher Hg exposure than that found in this study. However, further research is needed to support this view due to the limited number of samples analysed. Given the scarce ecotoxicological data available for bats and their protected status, we encourage further opportunistic studies using carcasses found

  15. Theoretical and Shock Tube Study of the Rate Constants for Hydrogen Abstraction Reactions of Ethyl Formate

    KAUST Repository

    Wu, Junjun

    2017-08-03

    We report a systematic chemical kinetics study of the H-atom abstractions from ethyl formate (EF) by H, O(3P), CH3, OH, and HO2 radicals. The geometry optimization and frequency calculation of all the species were conducted using the M06 method and the cc-pVTZ basis set. The one-dimensional hindered rotor treatment of the reactants and transition states and the intrinsic reaction coordinate analysis were also performed at the M06/cc-pVTZ level of theory. The relative electronic energies were calculated at the CCSD(T)/cc-pVXZ (where X = D, T) level of theory and further extrapolated to the complete basis set limit. Rate constants for the tittle reactions were calculated over the temperature range of 500‒2500 K by the transition state theory (TST) in conjunction with asymmetric Eckart tunneling effect. In addition, the rate constants of H-abstraction by hydroxyl radical were measured in shock tube experiments at 900‒1321 K and 1.4‒2.0 atm. Our theoretical rate constants of OH + EF → Products agree well with the experimental results within 15% over the experimental temperature range of 900‒1321 K. Branching ratios for the five types of H-abstraction reactions were also determined from their individual site-specific rate constants.

  16. Unsteady magnetohydrodynamic thermal and diffusion boundary layer from a horizontal circular cylinder

    Directory of Open Access Journals (Sweden)

    Boričić Aleksandar Z.

    2016-01-01

    Full Text Available The unsteady 2-D dynamic, thermal, and diffusion magnetohydrodynamic laminar boundary layer flow over a horizontal cylinder of incompressible and electrical conductivity fluid, in mixed convection in the presence of heat source or sink and chemical reactions. The present magnetic field is homogenous and perpendicular to the body surface. It is assumed that induction of outer magnetic field is a function of longitudinal co-ordinate outer electric field is neglected and magnetic Reynolds number is significantly lower than one, i. e. considered the problem is in approximation without induction. Fluid electrical conductivity is constant. Free stream velocity, temperature, and concentration on the body are functions of longitudinal co-ordinate. The developed governing boundary layer equations and associated boundary conditions are made dimensionless using a suitable similarity transformation and similarity parameters. System of non-dimensionless equations is solved using the implicit finite difference three-diagonal and iteration method. Numerical results are obtained and presented for different Prandtl, Eckart, and Schmidt numbers, and values: magnetic parameter, temperature, and diffusion parameters, buoyancy temperature parameters, thermal parameter, and chemical reaction parameter. Variation of velocity profiles, temperature and diffusion distributions, and many integral and differential characteristics, boundary layer, are evaluated numerically for different values of the magnetic field. Transient effects of velocity, temperature and diffusion are analyzed. A part of obtained results is given in the form of figures and corresponding conclusions.

  17. Path-integral virial estimator for reaction-rate calculation based on the quantum instanton approximation.

    Science.gov (United States)

    Yang, Sandy; Yamamoto, Takeshi; Miller, William H

    2006-02-28

    The quantum instanton approximation is a type of quantum transition-state theory that calculates the chemical reaction rate using the reactive flux correlation function and its low-order derivatives at time zero. Here we present several path-integral estimators for the latter quantities, which characterize the initial decay profile of the flux correlation function. As with the internal energy or heat-capacity calculation, different estimators yield different variances (and therefore different convergence properties) in a Monte Carlo calculation. Here we obtain a virial (-type) estimator by using a coordinate scaling procedure rather than integration by parts, which allows more computational benefits. We also consider two different methods for treating the flux operator, i.e., local-path and global-path approaches, in which the latter achieves a smaller variance at the cost of using second-order potential derivatives. Numerical tests are performed for a one-dimensional Eckart barrier and a model proton transfer reaction in a polar solvent, which illustrates the reduced variance of the virial estimator over the corresponding thermodynamic estimator.

  18. Bulk viscosity, interaction and the viability of phantom solutions

    Energy Technology Data Exchange (ETDEWEB)

    Leyva, Yoelsy; Sepulveda, Mirko [Universidad de Tarapaca, Departamento de Fisica, Facultad de Ciencias, Arica (Chile)

    2017-06-15

    We study the dynamics of a bulk viscosity model in the Eckart approach for a spatially flat Friedmann-Robertson-Walker (FRW) Universe. We have included radiation and dark energy, assumed as perfect fluids, and dark matter treated as an imperfect fluid having bulk viscosity. We also introduce an interaction term between the dark matter and dark energy components. Considering that the bulk viscosity is proportional to the dark matter energy density and imposing a complete cosmological dynamics, we find bounds on the bulk viscosity in order to reproduce a matter-dominated era (MDE). This constraint is independent of the interaction term. Some late time phantom solutions are mathematically possible. However, the constraint imposed by a MDE restricts the interaction parameter, in the phantom solutions, to a region consistent with a null value, eliminating the possibility of late time stable solutions with w < -1. From the different cases that we study, the only possible scenario, with bulk viscosity and interaction term, belongs to the quintessence region. In the latter case, we find bounds on the interaction parameter compatible with latest observational data. (orig.)

  19. H + CH{sub 2}CO {yields} CH{sub 3} + CO at high temperature : a high pressure chemical activation reaction with positive barrier.

    Energy Technology Data Exchange (ETDEWEB)

    Hranisavljevic, J.; Kumaran, S. S.; Michael, J. V.

    1997-12-08

    The Laser Photolysis-Shock Tube (LP-ST) technique coupled with H-atom atomic resonance absorption spectrometry (ARAS) has been used to study reaction, H + CH{sub 2}CO {r_arrow} CH{sub 3} + CO, over the temperature range, 863-1400 K. The results can be represented by the Arrhenius expression, k = (4.85 {+-} 0.70) x 10{sup {minus}11} exp({minus}2328 {+-} 155 K/T) cm{sup 3} molecule{sup {minus}1} s{sup {minus}1}. The present data have been combined with the earlier low temperature flash photolysis-resonance fluorescence measurements to yield a joint three parameter expression, k = 5.44 x 10{sup {minus}14} T{sup 0.8513} exp({minus}1429 K/T) cm{sup 3} molecule{sup {minus}1} s{sup {minus}1}. This is a chemical activation process that proceeds through vibrationally excited acetyl radicals. However, due to the presence of a low lying forward dissociation channel to CH{sub 3} + CO, the present results refer to the high pressure limiting rate constants. Hence, transition state theory with Eckart tunneling is used to explain the data.

  20. The reaction mechanisms and kinetics of CF3CHFOCH 3 and CHF 2CHFOCF 3 with atomic chlorine: a computational study.

    Science.gov (United States)

    Liu, Fang-Yu; Long, Zheng-Wen; Tan, Xing-Feng; Long, Bo

    2014-09-01

    Due to their lack of effect on the ozone depletion, hydrofluoroethers are considered as potential candidates for third generation refrigerants. In the present work, the mechanisms and kinetics of reaction of the Cl atom with CF(3)CHFOCH(3) and CHF(2)CHFOCF(3) were investigated theoretically using quantum chemical methods and transition state theory. Four reaction pathways for the title reaction were explored. By using conventional transition state theory with Eckart tunneling correction, the rate constants of the title reaction were obtained over the temperature range 200-300 K. Kinetic calculations demonstrate that H-abstraction from the -CH(3) group in CF(3)CHFOCH(3) and H-abstraction from the -CHF2 group in CHF(2)CHFOCF(3) are major reaction pathways, with the barrier heights of the two paths calculated to be -1.04 and 4.33 kcal mol(-1), respectively. However, the contribution of H-abstraction from the -CHFO- group for the two reactions should also be taken into account with increased temperature. At 298 K, the calculated overall rate constants of the reaction of CHF(2)CHFOCF(3) with the Cl atom are 4.27 × 10(-15) cm(3) molecule(-1) s(-1), which is consistent with the experimental value of (1.2 ± 2.0) × 10(-15) cm(3) molecule(-1) s(-1).

  1. European National Society Cardiovascular Journals: Background, rationale and mission statement of the 'Editors' Club' (Task Force of the European Society of Cardiology).

    Science.gov (United States)

    Alfonso, F; Ambrosio, G; Pinto, F J; van der Wall, E E

    2008-06-01

    Anesti Kondili MD, Djamaleddine Nibouche MD, Karlen Adamyan MD, Kurt Huber MD, Hugo Ector MD, Izet Masic MD, Rumiana Tarnovska MD, Mario Ivanusa MD, Vladimír Stane k MD, Jørgen Videbaek MD, Mohamed Hamed MD, Alexandras Laucevicius MD, Pirjo Mustonen MD, Jean-Yves Artigou MD, Ariel Cohen MD, Mamanti Rogava MD, Michael Böhm MD, Eckart Fleck MD, Gerd Heusch MD, Rainer Klawki MD, Panos Vardas MD, Christodoulos Stefanadis MD, József Tenczer MD, Massimo Chiariello MD, Aleksandras Laucevicius MD, Joseph Elias MD, Halima Benjelloun MD, Olaf Rødevand MD, Piotr Kul/akowski MD, Edvard Apetrei MD, Victor A. Lusov MD, Rafael G. Oganov MD, Velibor Obradovic MD, Gabriel Kamensky MD, Miran F. Kenda MD, Christer Höglund MD, Thomas F. Lüscher MD, René Lerch MD, Moufid Jokhadar MD, Habib Haouala MD, Vedat Sansoy MD, Valentin Shumakov MD, Adam Timmis MD. (European National Society Cardiovascular Journals Editors, see Appendix for complete affiliations).

  2. A viable method to predict acoustic streaming in presence of cavitation.

    Science.gov (United States)

    Louisnard, O

    2017-03-01

    The steady liquid flow observed under ultrasonic emitters generating acoustic cavitation can be successfully predicted by a standard turbulent flow calculation. The flow is driven by the classical averaged volumetric force density calculated from the acoustic field, but the inertial term in Navier-Stokes equations must be kept, and a turbulent solution must be sought. The acoustic field must be computed with a realistic model, properly accounting for dissipation by the cavitation bubbles [Louisnard, Ultrason. Sonochem., 19, (2012) 56-65]. Comparison with 20kHz experiments, involving the combination of acoustic streaming and a perpendicular forced flow in a duct, shows reasonably good agreement. Moreover, the persistence of the cavitation effects on the wall facing the emitter, in spite of the deflection of the streaming jet, is correctly reproduced by the model. It is also shown that predictions based either on linear acoustics with the correct turbulent solution, or with Louisnard's model with Eckart-Nyborg's theory yields unrealistic results. Copyright © 2016 Elsevier B.V. All rights reserved.

  3. Acoustic streaming in the transducer plane in ultrasonic particle manipulation devices.

    Science.gov (United States)

    Lei, Junjun; Glynne-Jones, Peter; Hill, Martyn

    2013-06-07

    In acoustofluidic manipulation and sorting devices, Rayleigh streaming flows are typically found in addition to the acoustic radiation forces. However, experimental work from various groups has described acoustic streaming that occurs in planar devices in a plane parallel to the transducer face. This is typically a four-quadrant streaming pattern with the circulation parallel to the transducer. Understanding its origins is essential for creating designs that limit or control this phenomenon. The cause of this kind of streaming pattern has not been previously explained as it is different from the well-known classical streaming patterns such as Rayleigh streaming and Eckart streaming, whose circulation planes are generally perpendicular to the face of the acoustic transducer. In order to gain insight into these patterns we present a numerical method based on Nyborg's limiting velocity boundary condition that includes terms ignored in the Rayleigh analysis, and verify its predictions against experimental PIV results in a simple device. The results show that the modelled particle trajectories match those found experimentally. Analysis of the dominant terms in the driving equations shows that the origin of this kind of streaming pattern is related to the circulation of the acoustic intensity.

  4. Quantum instanton evaluation of the kinetic isotope effects

    Energy Technology Data Exchange (ETDEWEB)

    Vanicek, Jiri; Miller, William H.; Castillo, Jesus F.; Aoiz, F.Javier

    2005-04-19

    A general quantum-mechanical method for computing kinetic isotope effects is presented. The method is based on the quantum instanton approximation for the rate constant and on the path integral Metropolis Monte-Carlo evaluation of the Boltzmann operator matrix elements. It computes the kinetic isotope effect directly, using a thermodynamic integration with respect to the mass of the isotope, thus avoiding the more computationally expensive process of computing the individual rate constants. The method is more accurate than variational transition-state theories or the semiclassical instanton method since it does not assume a single reaction path and does not use a semiclassical approximation of the Boltzmann operator. While the general Monte-Carlo implementation makes the method accessible to systems with a large number of atoms, we present numerical results for the Eckart barrier and for the collinear and full three-dimensional isotope variants of the hydrogen exchange reaction H+H{sub 2} {yields} H{sub 2}+H. In all seven test cases, for temperatures between 250 K and 600 K, the error of the quantum instanton approximation for the kinetic isotope effects is less than {approx}10%.

  5. Foreword

    Directory of Open Access Journals (Sweden)

    Lorenzo Bartalesi

    2013-12-01

    Full Text Available Evolutionary Aesthetics emerges today as a young and lively field of studies whose main aim is to rethink the traditional questions of philosophical Aesthetics in the light of biological theories, in particular in the light of Darwin's evolutionary theory by means of natural selection. The aim of this issue is to introduce Evolutionary Aesthetics into the Italian philosophical debate. Contributions collected cover almost entirely the lively, multifaceted spectrum of the discipline: 1 the high-debated question of the adaptive value of aesthetic sense, artistic practices and art fruition (Stephen Davies, Zach Norwood, Joseph Carroll; 2 the evolutionary explanation of human sexual preferences and production of artefacts (Hannes Rusch & Eckart Voland; 3 the possibility for a Darwinian non-reductionist definition of art as a culturally differentiated behavior (Kathryn Coe; Nancy E. Aiken; Roberta Dreon; 4 a comparative analysis of aesthetic experience from a cognitive viewpoint (Gianluca Consoli and from a morphological one (Salvatore Tedesco; 5 the influence of Darwinian perspective beyond the English boundaries, with particular reference to the Italian scientific community in the Nineteenth century (Elena Canadelli and to the tradition of Gestaltpsychologie (Michele Gardini; 6 a naturalistic approach to aesthetic experience and medial experience (Antonino Pennisi & Francesco Parisi.

  6. Influence de l'acoustic streaming sur la stabilité d'une couche de fluide isotherme ou chauffée latéralement

    Science.gov (United States)

    Dridi, Walid; Henry, Daniel; BenHadid, Hamda

    2007-03-01

    The linear stability of acoustic streaming flows induced by ultrasound waves (Eckart streaming), for both isothermal and laterally heated fluids confined between two parallel horizontal infinite walls has been studied. The basic profiles were determined analytically, and the eigenvalue problem derived for the temporal stability analysis was solved by a spectral Tau Chebyshev method. In the isothermal case, a critical acoustic parameter A leading to an oscillatory instability was determined. A is minimum for an acoustic beam width (normalized by the height of the fluid layer) H=0.32 and increases when either H is decreased or increased. The other result concerns the influence of the acoustic streaming flow on the stability of the laterally heated layer (Hadley flow). For rather small beam widths, the acoustic streaming flow destabilizes the Hadley flow, but for large beam widths ( H>0.6), a range of acoustic parameter values was found for which the Hadley flow is stabilized (increase of the thresholds), before a sharp decrease of the thresholds for larger A. Let us underline that the stability of such flows has not been yet studied in the literature. To cite this article: W. Dridi et al., C. R. Mecanique 335 (2007).

  7. Influence de l' acoustic streaming sur les instabilités affectant une couche de fluide chauffée latéralement

    Science.gov (United States)

    Dridi, Walid; Henry, Daniel; BenHadid, Hamda

    2009-04-01

    The effect of acoustic streaming (more precisely the Eckart streaming) on the linear stability of a laterally heated fluid layer confined between two horizontal infinite walls (Hadley flow) has been studied. In the considered range of Prandtl number ( 4×10⩽Pr⩽1), three types of instabilities prevail in the absence of acoustic streaming: two-dimensional stationary instabilities for low Prandtl numbers, and three-dimensional oscillatory and then stationary instabilities for higher Prandtl numbers. When an acoustic beam of width H=0.8 (normalized by the layer depth) is applied, the thresholds of the two-dimensional modes, which become oscillatory, increase with the acoustic intensity (monitored through the parameter A) before strongly decreasing to reach the pure acoustic streaming instability threshold. Concerning the three-dimensional instabilities, the thresholds of the oscillatory modes increase while those of the stationary modes strongly decrease. For Pr=0.1, these evolutions induce the crossing of the critical curves of these two modes when A is increased, so that the oscillatory modes which are dominant for small values of A are replaced by the stationary modes for larger values of A. The position of the crossing depends on the width H of the acoustic beam. To cite this article: W. Dridi et al., C. R. Mecanique 337 (2009).

  8. Computational Chemistry of Cyclopentane Low Temperature Oxidation

    KAUST Repository

    El Rachidi, Mariam

    2015-03-30

    Cycloalkanes are significant constituents of conventional fossil fuels, but little is known concerning their combustion chemistry and kinetics, particularly at low temperatures. This study investigates the pressure dependent kinetics of several reactions occurring during low-temperature cyclopentane combustion using theoretical chemical kinetics. The reaction pathways of the cyclopentyl + O2 adduct is traced to alkylhydroperoxide, cyclic ether, β-scission and HO2 elimination products. The calculations are carried out at the UCCSD(T)-F12b/cc-pVTZ-F12//M06-2X/6-311++G(d,p) level of theory. The barrierless entrance channel is treated using variable-reaction-coordinate transition state theory (VRC-TST) at the CASPT2(7e,6o) level of theory, including basis set, geometry relaxation and ZPE corrections. 1-D time-dependent multiwell master equation analysis is used to determine pressure-and temperature-dependent rate parameters of all investigated reactions. Tunneling corrections are included using Eckart barriers. Comparison with cyclohexane is used to elucidate the effect of ring size on the low temperature reactivity of naphthenes. The rate coefficients reported herein are suitable for use in cyclopentane and methylcyclopentane combustion models, even below ~900 K, where ignition is particularly sensitive to these pressure-dependent values.

  9. Neutrino Oscillations, And Hadronic Physics When Considering A Large Number Of Colors In Quantum Chromodynamics

    CERN Document Server

    Martin, D R

    2005-01-01

    This document consists of three chapters. The first chapter includes a detailed description of neutrino oscillations with an emphasis on the naturalness of obtaining a small value Ue3 within the Maki-Nakagawa-Sakata mixing matrix. With the use of the seesaw mechanism, it is found that the upper bound on this particular element is approaching its lower limit when we assume a very natural set of criteria for the origins of leptonic mixing. Also obtained are some general expressions which could provide insight into the Majorana nature of neutrino oscillations. The second chapter explores the use of operator methods in a 1/ Nc expansion for magnetic moments in QCD. An analysis of the entire set of magnetic moments is provided, including an explicit calculation of all twenty seven corresponding operators. A prediction of the sixteen unknown magnetic moments is also given, which were found using only the Wigner-Eckart theorem and a simple least squares fit to the available data. Using the predicted magnetic moments...

  10. Environmental Effects in Earth Rotation Data from the Large Laser-Gyroscope 'G

    Science.gov (United States)

    Gebauer, André; Schreiber, Ulrich; Klügel, Thomas

    2010-05-01

    Large laser gyroscopes allow the observation of the global rotation rate of the Earth and provide a direct reference to the instantaneous axis of rotation with high temporal resolution. This measurement method is independent and complementary to the VLBI technique, because it does not depend on external reference objects. Periodic signals from geophysical processes are analyzed in the measured datasets. Based on changes of the G ring laser hardware (see contribution Schreiber et al., this session) the instrumental sensitivity and stability improved significantly. Thus more geophysical processes both on global and local scale become visible. The time series of the measurements also contain irregular transient signals of different origin and magnitude. Several studies were carried out to identify the origin of these signals. First studies showed that the contribution of barometric loading is too small to account for the observed rotational signals. Then the effect of wind load on a local scale was studied. A detailed Finite-Element (FE) Model was developed with a dimension of about 10 km x 10 km and a minimum height of about 2 km. The topography is derived from a digital terrain model (DTM) of 25 m spatial resolution. Depending on the topography and land use the measured wind force loads the model. The results yields rotations in comparable order of magnitude as the observed ring laser data. The talk outlines the current state of ring laser data treatment.

  11. New approaches to source-sink metapopulations decoupling demography and dispersal.

    Science.gov (United States)

    Bansaye, Vincent; Lambert, Amaury

    2013-09-01

    Source-sink systems are metapopulations of patches with different, and possibly temporally varying, habitat qualities, which are commonly used in ecology to study the fate of spatially extended populations. We propose new techniques that disentangle the respective contributions of demography and dispersal to the dynamics and fate of a single species in a source-sink system. Our approach is valid for a general class of stochastic, individual-based, stepping-stone models, with density-independent demography and dispersal, provided that the metapopulation is finite or else enjoys some transitivity property. We provide (1) a simple criterion of persistence, by studying the motion of a single random disperser until it returns to its initial position; (2) a joint characterization of the long-term growth rate and of the asymptotic occupancy frequencies of the ancestral lineage of a random survivor, by using large deviations theory. Both techniques yield formulas decoupling demography and dispersal, and can be adapted to the case of periodic or random environments, where habitat qualities are autocorrelated in space and possibly in time. In this last case, we display examples of coupled time-averaged sinks allowing survival, as was previously known in the absence of demographic stochasticity for fully mixing (Jansen and Yoshimura, 1998) or partially mixing (Evans et al., 2012; Schreiber, 2010) metapopulations. Copyright © 2013 Elsevier Inc. All rights reserved.

  12. Water mobility and thermal properties of smoked soft cheese

    Directory of Open Access Journals (Sweden)

    Hanna Maria Baranowska

    2017-01-01

    Full Text Available The main goal of the present study was to characterize the functional parameters of smoked soft cheese, with the emphasis on the behavior of water and milk fat, as analyzed by DSC, which was used to directly measure the melting/freezing phase transitions in the cheese. This study was complemented by NMR measurements of the organization and distribution of the aqueous phase within the emulsions constituting the cheese. The smoked and unsmoked cheeses were characterized by similar compositions in terms of protein (19.08-19.12 g∙100 g-1, fat (18.86-19.02 g∙100 g-1, and water content (59.86-60.27 g∙100 g-1. The water activity was higher in the unsmoked cheese (aw = 0.9736 than in the smoked cheese (aw = 0.9615. This result was confirmed by DSC (higher ice melting enthalpy and NMR (higher T1 value measurements. The smoking process led to differences in the distribution and binding of water to the lipid-protein matrix of the cheese. There was more non-freezed bound water in the smoked cheese which resulted in a more fragile and loosened structure in the smoked cheese than the unsmoked, which manifested in lower values of stretching and meltability. The meltability of the mozzarella smoked cheese was 1.5 times less than that of the unsmoked cheese (tube test and Schreiber test.

  13. Entropy Transfer between Residue Pairs and Allostery in Proteins: Quantifying Allosteric Communication in Ubiquitin.

    Science.gov (United States)

    Hacisuleyman, Aysima; Erman, Burak

    2017-01-01

    It has recently been proposed by Gunasakaran et al. that allostery may be an intrinsic property of all proteins. Here, we develop a computational method that can determine and quantify allosteric activity in any given protein. Based on Schreiber's transfer entropy formulation, our approach leads to an information transfer landscape for the protein that shows the presence of entropy sinks and sources and explains how pairs of residues communicate with each other using entropy transfer. The model can identify the residues that drive the fluctuations of others. We apply the model to Ubiquitin, whose allosteric activity has not been emphasized until recently, and show that there are indeed systematic pathways of entropy and information transfer between residues that correlate well with the activities of the protein. We use 600 nanosecond molecular dynamics trajectories for Ubiquitin and its complex with human polymerase iota and evaluate entropy transfer between all pairs of residues of Ubiquitin and quantify the binding susceptibility changes upon complex formation. We explain the complex formation propensities of Ubiquitin in terms of entropy transfer. Important residues taking part in allosteric communication in Ubiquitin predicted by our approach are in agreement with results of NMR relaxation dispersion experiments. Finally, we show that time delayed correlation of fluctuations of two interacting residues possesses an intrinsic causality that tells which residue controls the interaction and which one is controlled. Our work shows that time delayed correlations, entropy transfer and causality are the required new concepts for explaining allosteric communication in proteins.

  14. Horopters--definition and construction.

    Science.gov (United States)

    Vojniković, Bozo; Tamajo, Ettore

    2013-04-01

    The feature of Horopter was studied allready since the arabic and persian school, where Aguilonius defined it in 1613 for the first time. From those times til now, horopter was investigated as a geometrical feature, but also as a physiological feature of single vision. In general, there is the geometrical or theoretical horopter (Vieth, G. 1818, Muller, J. 1823) and the empirical horopter (Wheatstone, C. 1838, Panum, P L. 1858). Helmholtz includes cyclo-rotation of the eye and though geometrically defines the horopter as a "twisted cubic" fenomena, which accept also Schreiber, K.M. (2006). Our approach is geometrically and includes trigonometrical analysis of the visual lines and fixation points in space, but including the eye accommodation because the horopter plane in space is determined with the convergence angle of the bulbus and the accommodation sharpness of the eye near the fixation point and the whole presenting retina in the horopter space. We get the horopter with the presentation of both retinas in space, shaped as two spherical planes (calots), two semi-spheres with a common center of fixation. The width of their spacing which is the Panum's fusional area known as confusion of accommodation corresponds to the convergence angle of both bulbuae. If the fixation point is nearer, the Panum's fusional area is wider and hence the larger the disparation of imagies on the retina. The authors have mathematically estimated the radius of the horopter planes as: R = PD/2cosa.

  15. Shmuel Malkin (1934-2017) : Listening to photosynthesis and making music.

    Science.gov (United States)

    Herbert, Stephen K; Siderer, Yona; Govindjee

    2018-01-30

    We present here the life and work of Shmuel Malkin (1934-2017), an accomplished scientist and a gifted musician who touched the lives of many around the world. His early scientific work addressed the dynamics of light harvesting and electron transport in photosynthesis. Later, he used photoacoustic and photothermal methodologies to explore all aspects of photosynthesis. As a musician, Shmuel played the piano often for family and friends but after his formal retirement, he produced a body of original musical compositions, many of which were performed publicly. Throughout his life, Shmuel was a caring and deeply thoughtful man, respected and loved by colleagues, family, and friends. This tribute presents a summary of Shmuel's work as well as remembrances written by his wife, Nava Malkin, their son, Eyal Malkinson, and many of his colleagues: Michael Havaux from France; Sandra and Marcel Jansen from Ireland; David Cahen, Marvin Edelmann, Joop and Onnie de Graaf, Jonathan Gressel, Uri Pick, Yona Siderer, and Elisha Tel-Or from Israel; Ulrich Schreiber from Germany; James Barber and Alison Telfer from the UK; Govindjee, Stephen Herbert and Thomas Sharkey from the USA. Minnie Ho and Iris Malkin of the USA wrote contributions about Shmuel's music.

  16. A low-cost approach to electronic excitation energies based on the driven similarity renormalization group

    Science.gov (United States)

    Li, Chenyang; Verma, Prakash; Hannon, Kevin P.; Evangelista, Francesco A.

    2017-08-01

    We propose an economical state-specific approach to evaluate electronic excitation energies based on the driven similarity renormalization group truncated to second order (DSRG-PT2). Starting from a closed-shell Hartree-Fock wave function, a model space is constructed that includes all single or single and double excitations within a given set of active orbitals. The resulting VCIS-DSRG-PT2 and VCISD-DSRG-PT2 methods are introduced and benchmarked on a set of 28 organic molecules [M. Schreiber et al., J. Chem. Phys. 128, 134110 (2008)]. Taking CC3 results as reference values, mean absolute deviations of 0.32 and 0.22 eV are observed for VCIS-DSRG-PT2 and VCISD-DSRG-PT2 excitation energies, respectively. Overall, VCIS-DSRG-PT2 yields results with accuracy comparable to those from time-dependent density functional theory using the B3LYP functional, while VCISD-DSRG-PT2 gives excitation energies comparable to those from equation-of-motion coupled cluster with singles and doubles.

  17. Relación entre plasticidad y ejecución cognitiva: el potencial de aprendizaje en ancianos con deterioro cognitivo

    Directory of Open Access Journals (Sweden)

    Elena Navarro-González

    2011-08-01

    Full Text Available La vejez es una fase amplia de la vida caracterizada por importantes diferencias interindividuales y trayectorias vitales diferentes que han sido sintetizadas en tres modalidades de envejecimiento: usual, patológico y con éxito (Rowe y Khan, 1997. El estudio de las variables asociadas a dichos patrones y a la evolución cognitiva en la vejez ha generado numerosos estudios, entre los cuales destacamos el análisis del potencial de aprendizaje o la plasticidad cognitiva como herramienta evaluativa que permite establecer diferencias entre ancianos a un nivel mayor del que permiten las evaluaciones estáticas (Schreiber y Schneider, 2006. El objetivo de esta investigación es analizar en una muestra inicial de 312 ancianos con perfiles cognitivos diferentes el rendimiento en la prueba de evaluación del potencial de aprendizaje AVLT-PA para determinar en qué medida diferentes marcadores de la misma sirven para clasificar a los participantes de la manera más correcta y cuáles sirven para predecir la evolución cognitiva de los ancianos a largo plazo. Los resultados obtenidos muestran que el marcador más idóneo de la prueba AVLT-PA para clasificar a los ancianos y determinar su evolución cognitiva es la medida de recuerdo demorado de la prueba.

  18. Organizing for a Peaceful Crowd: An Example of a Football Match

    Directory of Open Access Journals (Sweden)

    Ingrid Hylander

    2010-03-01

    Full Text Available Crowd violence has interested researchers in social psychology for many years and is an important issue for sports psychology (STOTT, ADANG, LIVINGSTONE & SCHREIBER, 2007; STOTT, HUTCHINSON & DRURY, 2001; RUSSELL, 2004; MUSTONEN, ARMS & RUSSELL, 1996. Riots in crowds have been explained from different theoretical perspectives (HYLANDER, 2008, such as individual differences, de-individuation (PRENTICE-DUNN & ROGERS, 1989, group interaction (DRURY & REICHER, 2000, history (GUTTMAN, 1986, 1998 and cultural perspectives (CRABBE, 2003. In this study, a social psychology model focusing on group interaction, the Aggravation and Mitigation (AM model (GUVÅ & HYLANDER, 2008; GRANSTRÖM, 2008; GRANSTRÖM & ROSANDER, 2008, is used as a means of analysis. This article applies the AM model to a sporting event to identify if and how peacemaking processes can be detected. Furthermore, the intention is to discern and illuminate organizational strategies that maybe linked to peacemaking processes. The main results indicate that when arrangements are based on (a "festival-making," (b arrangements for basic needs and recognizable order and (c the creation of a superordinate identity, then the outcome of mass events may turn out peaceful, which is also in line with the AM model. URN: urn:nbn:de:0114-fqs100283

  19. Causality, transfer entropy, and allosteric communication landscapes in proteins with harmonic interactions.

    Science.gov (United States)

    Hacisuleyman, Aysima; Erman, Burak

    2017-06-01

    A fast and approximate method of generating allosteric communication landscapes in proteins is presented by using Schreiber's entropy transfer concept in combination with the Gaussian Network Model of proteins. Predictions of the model and the allosteric communication landscapes generated show that information transfer in proteins does not necessarily take place along a single path, but an ensemble of pathways is possible. The model emphasizes that knowledge of entropy only is not sufficient for determining allosteric communication and additional information based on time delayed correlations should be introduced, which leads to the presence of causality in proteins. The model provides a simple tool for mapping entropy sink-source relations into pairs of residues. By this approach, residues that should be manipulated to control protein activity may be determined. This should be of great importance for allosteric drug design and for understanding the effects of mutations on function. The model is applied to determine allosteric communication in three proteins, Ubiquitin, Pyruvate Kinase, and the PDZ domain. Predictions are in agreement with molecular dynamics simulations and experimental evidence. Proteins 2017; 85:1056-1064. © 2017 Wiley Periodicals, Inc. © 2017 Wiley Periodicals, Inc.

  20. Notes on the history of the Dr. Senckenbergische Anatomie in Frankfurt/Main. Part II. The Dr. Senckenbergische Anatomie during the Third Reich and its body supply.

    Science.gov (United States)

    Brehm, Thomas Theo; Korf, Horst-Werner; Benzenhöfer, Udo; Schomerus, Christof; Wicht, Helmut

    2015-09-01

    In order to be able to understand how body supply was maintained at the Dr. Senckenbergische Anatomie from 1933 to 1945 - with special emphasis on victims of the National Socialist regime - we have collected information from various and often fragmentary sources. The documents reveal that during this period at least 474 bodies were brought to the anatomical institute. Among them were the bodies of at least 71 prisoners, 51 of whom had been executed, and the bodies of 8 inmates of (labor-) camps. 356 unclaimed bodies were received, some of them may stem from victims of "euthanasia" programs. The sources of 39, as of yet, unnamed bodies could not be verified. The current collections and the catalogs were screened for remains of victims of the National Socialist regime, but none were found. The vast majority of the bodies were used for teaching purposes. Hans Schreiber, one of the directors of the institute, whose biography is provided here, used at least 9 additional executed individuals for his research. Wherever possible, we have identified the victims of the National Socialist regime, executed persons and the inmates of (labor-) camps, whose bodies were used by the anatomists in Frankfurt, by name. Among the victims was Georg Fröba, a communist philanthropist, whose biography is provided. Copyright © 2015 Elsevier GmbH. All rights reserved.

  1. Freed by interaction kinetic states in the Harper model

    Science.gov (United States)

    Frahm, Klaus M.; Shepelyansky, Dima L.

    2015-12-01

    We study the problem of two interacting particles in a one-dimensional quasiperiodic lattice of the Harper model. We show that a short or long range interaction between particles leads to emergence of delocalized pairs in the non-interacting localized phase. The properties of these freed by interaction kinetic states (FIKS) are analyzed numerically including the advanced Arnoldi method. We find that the number of sites populated by FIKS pairs grows algebraically with the system size with the maximal exponent b = 1, up to a largest lattice size N = 10 946 reached in our numerical simulations, thus corresponding to a complete delocalization of pairs. For delocalized FIKS pairs the spectral properties of such quasiperiodic operators represent a deep mathematical problem. We argue that FIKS pairs can be detected in the framework of recent cold atom experiments [M. Schreiber et al., Science 349, 842 (2015)] by a simple setup modification. We also discuss possible implications of FIKS pairs for electron transport in the regime of charge-density wave and high T c superconductivity.

  2. Prediction of process cheese instrumental texture and melting characteristics using dielectric spectroscopy and chemometrics.

    Science.gov (United States)

    Amamcharla, J K; Metzger, L E

    2015-09-01

    This study evaluated the potentiality of dielectric spectroscopy as a tool to predict the functional properties of process cheese. Dielectric properties of process cheese were collected over the frequency range 0.2 to 3.2GHz at 25°C. Dielectric spectra of process cheese were collected using a high-temperature, open-ended dielectric probe connected to a vector network analyzer. The present study was conducted using 2 sets of commercial process cheese formulations and a set of specially formulated process cheese. For the all the process cheese samples analyzed, a decrease in dielectric constant and dielectric loss factor was observed as the incident frequency increased. Partial least square regression (PLSR) and multilayer perceptron neural network models were developed using the dielectric spectra of process cheese to predict the hardness (gf), melting point (°C), and modified Schreiber melt diameter (mm) of process cheese. The prediction models were validated using the full cross-validation method. The ratio of prediction error to deviation was greater than 2 for melt diameter and hardness, indicating a good practical utility of the PLSR prediction models. The predictability of multilayer perceptron neural network was less than the PLSR models and could be due to the small number of training samples in the data sets. Dielectric spectroscopy coupled with PLSR could be a useful tool for the nondestructive measurement of functional properties of process cheese. Copyright © 2015 American Dairy Science Association. Published by Elsevier Inc. All rights reserved.

  3. Tank 241-TX-118, core 236 analytical results for the final report

    Energy Technology Data Exchange (ETDEWEB)

    ESCH, R.A.

    1998-11-19

    This document is the analytical laboratory report for tank 241-TX-118 push mode core segments collected between April 1, 1998 and April 13, 1998. The segments were subsampled and analyzed in accordance with the Tank 241-TX-118 Push Mode Core sampling and Analysis Plan (TSAP) (Benar, 1997), the Safety Screening Data Quality Objective (DQO) (Dukelow, et al., 1995), the Data Quality Objective to Support Resolution of the Organic Complexant Safety Issue (Organic DQO) (Turner, et al, 1995) and the Historical Model Evaluation Data Requirements (Historical DQO) (Sipson, et al., 1995). The analytical results are included in the data summary table (Table 1). None of the samples submitted for Differential Scanning Calorimetry (DSC) and Total Organic Carbon (TOC) exceeded notification limits as stated in the TSAP (Benar, 1997). One sample exceeded the Total Alpha Activity (AT) analysis notification limit of 38.4{micro}Ci/g (based on a bulk density of 1.6), core 236 segment 1 lower half solids (S98T001524). Appropriate notifications were made. Plutonium 239/240 analysis was requested as a secondary analysis. The statistical results of the 95% confidence interval on the mean calculations are provided by the Tank Waste Remediation Systems Technical Basis Group in accordance with the Memorandum of Understanding (Schreiber, 1997) and are not considered in this report.

  4. Adjusting wheal size measures to correct atopy misclassification

    Directory of Open Access Journals (Sweden)

    Zhang H

    2011-08-01

    Full Text Available Hongmei Zhang1,*, Wilfried Karmaus1,*, Jianjun Gan2, Weichao Bao1,*, Yan D Zhao3, Dewi Rahardja3, John W Holloway5, Martha Scott4,5, Syed Hasan Arshad4,51Department of Epidemiology and Biostatistics, The University of South Carolina, Columbia, SC, USA; 2GlaxoSmithKline, Research Triangle Park, NC, USA; 3Department of Clinical Science and Simmons Cancer Center, UT Southwestern Medical Center, Dallas, TX, USA; 4The David Hide Asthma and Allergy Research Center, St Mary’s Hospital, Newport, Isle of Wight, UK; 5School of Medicine, University of Southampton, Southampton, UK *These authors contributed equally to this articlePurpose: Skin prick testing (SPT is fundamental to the practice of clinical allergy identifying relevant allergens and predicting the clinical expression of disease. Wheal sizes on SPT are used to identify atopic cases, and the cut-off value for a positive test is commonly set at 3 mm. However, the measured wheal sizes do not solely reflect the magnitude of skin reaction to allergens, but also skin reactivity (reflected in the size of histamine reaction and other random or non-random factors. We sought to estimate wheal sizes exclusively due to skin response to allergens and propose gender-specific cutoff points of atopy.Methods: We developed a Bayesian method to adjust observed wheal sizes by excluding histamine and other factor effects, based on which revised cutoff points are proposed for males and females, respectively. The method is then applied to and intensively evaluated using a study population aged 18, at a location on the Isle of Wight in the United Kingdom. To evaluate the proposed approach, two sample t-tests for population means and proportion tests are applied.Results: Four common aeroallergens, house dust mite (HDM, grass pollen, dog dander, and alternaria are considered in the study. Based on 3 mm cutoff, males tend to be more atopic than females (P-values are between 0.00087 and 0.062. After applying the

  5. Photovoltaic reciprocity and quasi-Fermi level splitting in nanostructure-based solar cells (Conference Presentation)

    Science.gov (United States)

    Aeberhard, Urs

    2017-04-01

    The photovoltaic reciprocity theory relates the electroluminescence spectrum of a solar cell under applied bias to the external photovoltaic quantum efficiency of the device as measured at short circuit conditions [1]. So far, the theory has been verified for a wide range of devices and material systems and forms the basis of a growing number of luminesecence imaging techniques used in the characterization of photovoltaic materials, cells and modules [2-5]. However, there are also some examples where the theory fails, such as in the case of amorphous silicon. In our contribution, we critically assess the assumptions made in the derivation of the theory and compare its predictions with rigorous formal relations as well as numerical computations in the framework of a comprehensive quantum-kinetic theory of photovoltaics [6] as applied to ultra-thin absorber architectures [7]. One of the main applications of the photovoltaic reciprocity relation is the determination of quasi-Fermi level splittings (QFLS) in solar cells from the measurement of luminescence. In nanostructure-based photovoltaic architectures, the determination of QFLS is challenging, but instrumental to assess the performance potential of the concepts. Here, we use our quasi-Fermi level-free theory to investigate existence and size of QFLS in quantum well and quantum dot solar cells. [1] Uwe Rau. Reciprocity relation between photovoltaic quantum efficiency and electrolumines- cent emission of solar cells. Phys. Rev. B, 76(8):085303, 2007. [2] Thomas Kirchartz and Uwe Rau. Electroluminescence analysis of high efficiency cu(in,ga)se2 solar cells. J. Appl. Phys., 102(10), 2007. [3] Thomas Kirchartz, Uwe Rau, Martin Hermle, Andreas W. Bett, Anke Helbig, and Jrgen H. Werner. Internal voltages in GaInP-GaInAs-Ge multijunction solar cells determined by electro- luminescence measurements. Appl. Phys. Lett., 92(12), 2008. [4] Thomas Kirchartz, Anke Helbig, Wilfried Reetz, Michael Reuter, Jürgen H. Werner, and

  6. Functional respiratory imaging to assess the interaction between systemic roflumilast and inhaled ICS/LABA/LAMA

    Directory of Open Access Journals (Sweden)

    Vos W

    2016-02-01

    Full Text Available Wim Vos,1 Bita Hajian,2 Jan De Backer,1 Cedric Van Holsbeke,1 Samir Vinchurkar,1 Rita Claes,2 Annemie Hufkens,2 Paul M Parizel,3 Lieven Bedert,4 Wilfried De Backer2 1FLUIDDA nv, Groeningenlei, Kontich, 2Department of Respiratory Medicine, 3Department of Radiology, University Hospital Antwerp, Wilrijkstraat, Edegem, 4Department of Respiratory Medicine, ZNA Middelheim Hospital, Antwerp, Belgium Background: Patients with COPD show a significant reduction of the lobar hyperinflation at the functional residual capacity level in the patients who improved >120 mL in forced expiratory volume in 1 second (FEV1 after 6 months of treatment with roflumilast in addition to inhaled corticosteroids (ICSs/long-acting beta-2 agonists (LABAs/long-acting muscarinic antagonists (LAMAs.Methods: Functional respiratory imaging was used to quantify lobar hyperinflation, blood vessel density, ventilation, aerosol deposition, and bronchodilation. To investigate the exact mode of action of roflumilast, correlations between lobar and global measures have been tested using a mixed-model approach with nested random factors and Pearson correlation, respectively.Results: The reduction in lobar hyperinflation appears to be associated with a larger blood vessel density in the respective lobes (t=−2.154, P=0.040; lobes with a higher percentage of blood vessels reduce more in hyperinflation in the responder group. Subsequently, it can be observed that lobes that reduce in hyperinflation after treatment are better ventilated (t=−5.368, P<0.001. Functional respiratory imaging (FRI-based aerosol deposition showed that enhanced ventilation leads to more peripheral particle deposition of ICS/LABA/LAMA in the better-ventilated areas (t=2.407, P=0.024. Finally, the study showed that areas receiving more particles have increased FRI-based bronchodilation (t=2.564, P=0.017, leading to an increase in FEV1 (R=0.348, P=0.029.Conclusion: The study demonstrated that orally administered

  7. Modelling non-adiabatic effects in H₃⁺: solution of the rovibrational Schrödinger equation with motion-dependent masses and mass surfaces.

    Science.gov (United States)

    Mátyus, Edit; Szidarovszky, Tamás; Császár, Attila G

    2014-10-21

    Introducing different rotational and vibrational masses in the nuclear-motion Hamiltonian is a simple phenomenological way to model rovibrational non-adiabaticity. It is shown on the example of the molecular ion H3(+), for which a global adiabatic potential energy surface accurate to better than 0.1 cm(-1) exists [M. Pavanello, L. Adamowicz, A. Alijah, N. F. Zobov, I. I. Mizus, O. L. Polyansky, J. Tennyson, T. Szidarovszky, A. G. Császár, M. Berg et al., Phys. Rev. Lett. 108, 023002 (2012)], that the motion-dependent mass concept yields much more accurate rovibrational energy levels but, unusually, the results are dependent upon the choice of the embedding of the molecule-fixed frame. Correct degeneracies and an improved agreement with experimental data are obtained if an Eckart embedding corresponding to a reference structure of D(3h) point-group symmetry is employed. The vibrational mass of the proton in H3(+) is optimized by minimizing the root-mean-square (rms) deviation between the computed and recent high-accuracy experimental transitions. The best vibrational mass obtained is larger than the nuclear mass of the proton by approximately one third of an electron mass, m(opt,p)((v))=m(nuc,p)+0.31224m(e). This optimized vibrational mass, along with a nuclear rotational mass, reduces the rms deviation of the experimental and computed rovibrational transitions by an order of magnitude. Finally, it is shown that an extension of the algorithm allowing the use of motion-dependent masses can deal with coordinate-dependent mass surfaces in the rovibrational Hamiltonian, as well.

  8. Modelling non-adiabatic effects in H{sub 3}{sup +}: Solution of the rovibrational Schrödinger equation with motion-dependent masses and mass surfaces

    Energy Technology Data Exchange (ETDEWEB)

    Mátyus, Edit, E-mail: matyus@chem.elte.hu [Institute of Chemistry, Eötvös University, P.O. Box 32, H-1518 Budapest 112 (Hungary); Szidarovszky, Tamás [MTA-ELTE Research Group on Complex Chemical Systems, Pázmány Péter sétány 1/A, H-1117 Budapest (Hungary); Császár, Attila G., E-mail: csaszar@chem.elte.hu [Institute of Chemistry, Eötvös University, P.O. Box 32, H-1518, Budapest 112, Hungary and MTA-ELTE Research Group on Complex Chemical Systems, Pázmány Péter sétány 1/A, H-1117 Budapest (Hungary)

    2014-10-21

    Introducing different rotational and vibrational masses in the nuclear-motion Hamiltonian is a simple phenomenological way to model rovibrational non-adiabaticity. It is shown on the example of the molecular ion H{sub 3}{sup +}, for which a global adiabatic potential energy surface accurate to better than 0.1 cm{sup −1} exists [M. Pavanello, L. Adamowicz, A. Alijah, N. F. Zobov, I. I. Mizus, O. L. Polyansky, J. Tennyson, T. Szidarovszky, A. G. Császár, M. Berg et al., Phys. Rev. Lett. 108, 023002 (2012)], that the motion-dependent mass concept yields much more accurate rovibrational energy levels but, unusually, the results are dependent upon the choice of the embedding of the molecule-fixed frame. Correct degeneracies and an improved agreement with experimental data are obtained if an Eckart embedding corresponding to a reference structure of D{sub 3h} point-group symmetry is employed. The vibrational mass of the proton in H{sub 3}{sup +} is optimized by minimizing the root-mean-square (rms) deviation between the computed and recent high-accuracy experimental transitions. The best vibrational mass obtained is larger than the nuclear mass of the proton by approximately one third of an electron mass, m{sub opt,p}{sup (v)}=m{sub nuc,p}+0.31224 m{sub e}. This optimized vibrational mass, along with a nuclear rotational mass, reduces the rms deviation of the experimental and computed rovibrational transitions by an order of magnitude. Finally, it is shown that an extension of the algorithm allowing the use of motion-dependent masses can deal with coordinate-dependent mass surfaces in the rovibrational Hamiltonian, as well.

  9. Full dimensional Franck-Condon factors for the acetylene tilde{{A}} 1Au—{tilde{X}} {^1Σ _g^+} transition. I. Method for calculating polyatomic linear—bent vibrational intensity factors and evaluation of calculated intensities for the gerade vibrational modes in acetylene

    Science.gov (United States)

    Park, G. Barratt

    2014-10-01

    Franck-Condon vibrational overlap integrals for the tilde{A} {^1A_u}—{tilde{X}} {^1Σ _g^+} transition in acetylene have been calculated in full dimension in the harmonic normal mode basis. The calculation uses the method of generating functions first developed for polyatomic Franck-Condon factors by Sharp and Rosenstock [J. Chem. Phys. 41(11), 3453-3463 (1964)], and previously applied to acetylene by Watson [J. Mol. Spectrosc. 207(2), 276-284 (2001)] in a reduced-dimension calculation. Because the transition involves a large change in the equilibrium geometry of the electronic states, two different types of corrections to the coordinate transformation are considered to first order: corrections for axis-switching between the Cartesian molecular frames and corrections for the curvilinear nature of the normal modes at large amplitude. The angular factor in the wavefunction for the out-of-plane component of the trans bending mode, ν _4^' ' }, is treated as a rotation, which results in an Eckart constraint on the polar coordinates of the bending modes. To simplify the calculation, the other degenerate bending mode, ν _5^' ' }, is integrated in the Cartesian basis and later transformed to the constrained polar coordinate basis, restoring the conventional v and l quantum numbers. An updated tilde{A}-state harmonic force field obtained recently in the R. W. Field research group is evaluated. The results for transitions involving the gerade vibrational modes are in qualitative agreement with experiment. Calculated results for transitions involving ungerade modes are presented in Paper II of this series [G. B. Park, J. H. Baraban, and R. W. Field, "Full dimensional Franck-Condon factors for the acetylene tilde{A} {^1A_u}—{tilde{X}} {^1Σ _g^+} transition. II. Vibrational overlap factors for levels involving excitation in ungerade modes," J. Chem. Phys. 141, 134305 (2014)].

  10. Modulation of the activity of N-methyl-D-aspartate receptors as a novel treatment option for depression: current clinical evidence and therapeutic potential of rapastinel (GLYX-13

    Directory of Open Access Journals (Sweden)

    Vasilescu AN

    2017-03-01

    Full Text Available Andrei-Nicolae Vasilescu,1,* Nina Schweinfurth,2,* Stefan Borgwardt,2,* Peter Gass,1 Undine E Lang,2,* Dragos Inta,1,2,* Sarah Eckart2,* 1Department of Psychiatry and Psychotherapy, Central Institute of Mental Health, Medical Faculty Mannheim, Heidelberg University, Heidelberg, Germany; 2Department of Psychiatry (Universitäre Psychiatrische Kliniken, University of Basel, Basel, Switzerland *These authors contributed equally to this work Abstract: Classical monoaminergic antidepressants show several disadvantages, such as protracted onset of therapeutic action. Conversely, the fast and sustained antidepressant effect of the N-methyl-d-aspartate receptor (NMDAR antagonist ketamine raises vast interest in understanding the role of the glutamate system in mood disorders. Indeed, numerous data support the existence of glutamatergic dysfunction in major depressive disorder (MDD. Drawback to this short-latency therapy is its side effect profile, especially the psychotomimetic action, which seriously hampers the common and widespread clinical use of ketamine. Therefore, there is a substantial need for alternative glutamatergic antidepressants with milder side effects. In this article, we review evidence that implicates NMDARs in the prospective treatment of MDD with focus on rapastinel (formerly known as GLYX-13, a novel synthetic NMDAR modulator with fast antidepressant effect, which acts by enhancing NMDAR function as opposed to blocking it. We summarize and discuss current clinical and animal studies regarding the therapeutic potential of rapastinel not only in MDD but also in other psychiatric disorders, such as obsessive–compulsive disorder and posttraumatic stress disorder. Additionally, we discuss current data concerning the molecular mechanisms underlying the antidepressant effect of rapastinel, highlighting common aspects as well as differences to ketamine. In 2016, rapastinel received the Breakthrough Therapy designation for the treatment

  11. Nail psoriasis: clinical features, pathogenesis, differential diagnoses, and management

    Directory of Open Access Journals (Sweden)

    Haneke E

    2017-10-01

    Full Text Available Eckart Haneke1–4 1Department of Dermatology, Inselspital, University of Bern, Bern, Switzerland; 2Dermatology Practice Dermaticum, Freiburg, Germany; 3Centro de Dermatología Epidermis, Instituto CUF, Porto, Portugal; 4Department of Dermatology, University Hospital, Gent, Belgium Abstract: Psoriasis is the skin disease that most frequently affects the nails. Depending on the very nail structure involved, different clinical nail alterations can be observed. Irritation of the apical matrix results in psoriatic pits, mid-matrix involvement may cause leukonychia, whole matrix affection may lead to red lunulae or severe nail dystrophy, nail bed involvement may cause salmon spots, subungual hyperkeratosis, and splinter hemorrhages, and psoriasis of the distal nail bed and hyponychium causes onycholysis whereas that of the proximal nail fold causes psoriatic paronychia. The more extensive the involvement, the more severe is the nail destruction. Pustular psoriasis may be seen as yellow spots under the nail or, in case of acrodermatitis continua suppurativa, as an insidious progressive loss of the nail organ. Nail psoriasis has a severe impact on quality of life and may interfere with professional and other activities. Management includes patient counseling, avoidance of stress and strain to the nail apparatus, and different types of treatment. Topical therapy may be tried but is rarely sufficiently efficient. Perilesional injections with corticosteroids and methotrexate are often beneficial but may be painful and cannot be applied to many nails. All systemic treatments clearing widespread skin lesions usually also clear the nail lesions. Recently, biologicals were introduced into nail psoriasis treatment and found to be very effective. However, their use is restricted to severe cases due to high cost and potential systemic adverse effects. Keywords: nail psoriasis, etiology, pathology, quality of life, impact, treatment

  12. Characterization of HIFU transducers designed for sonochemistry application: Acoustic streaming.

    Science.gov (United States)

    Hallez, L; Touyeras, F; Hihn, J-Y; Bailly, Y

    2016-03-01

    Cavitation distribution in a High Intensity Focused Ultrasound sonoreactors (HIFU) has been extensively described in the recent literature, including quantification by an optical method (Sonochemiluminescence SCL). The present paper provides complementary measurements through the study of acoustic streaming generated by the same kind of HIFU transducers. To this end, results of mass transfer measurements (electrodiffusional method) were compared to optical method ones (Particle Image Velocimetry). This last one was used in various configurations: with or without an electrode in the acoustic field in order to have the same perturbation of the wave propagation. Results show that the maximum velocity is not located at the focal but shifted near the transducer, and that this shift is greater for high powers. The two cavitation modes (stationary and moving bubbles) are greatly affect the hydrodynamic behavior of our sonoreactors: acoustic streaming and the fluid generated by bubble motion. The results obtained by electrochemical measurements show the same low hydrodynamic activity in the transducer vicinity, the same shift of the active focal toward the transducer, and the same absence of activity in the post-focal axial zone. The comparison with theoretical Eckart's velocities (acoustic streaming in non-cavitating media) confirms a very high activity at the "sonochemical focal", accounted for by wave distortion, which induced greater absorption coefficients. Moreover, the equivalent liquid velocities are one order of magnitude larger than the ones measured by PIV, confirming the enhancement of mass transfer by bubbles oscillation and collapse close to the surface, rather than from a pure streaming effect. Copyright © 2015 Elsevier B.V. All rights reserved.

  13. Quantum tunneling during interstellar surface-catalyzed formation of water: the reaction H + H2O2 → H2O + OH.

    Science.gov (United States)

    Lamberts, Thanja; Samanta, Pradipta Kumar; Köhn, Andreas; Kästner, Johannes

    2016-12-07

    The final step of the water formation network on interstellar grain surfaces starting from the H + O2 route is the reaction between H and H2O2. This reaction is known to have a high activation energy and therefore at low temperatures it can only proceed via tunneling. To date, however, no rate constants are available at temperatures below 200 K. In this work, we use instanton theory to compute rate constants for the title reaction with and without isotopic substitutions down to temperatures of 50 K. The calculations are based on density functional theory, with additional benchmarks for the activation energy using unrestricted single-reference and multireference coupled-cluster single-point energies. Gas-phase bimolecular rate constants are calculated and compared with available experimental data not only for H + H2O2 → H2O + OH, but also for H + H2O2 → H2 + HO2. We find a branching ratio where the title reaction is favored by at least two orders of magnitude at 114 K. In the interstellar medium this reaction predominantly occurs on water surfaces, which increases the probability that the two reactants meet. To mimic this, one, two, or three spectator H2O molecules are added to the system. Eley-Rideal bimolecular and Langmuir-Hinshelwood unimolecular rate constants are presented here. The kinetic isotope effects for the various cases are compared to experimental data as well as to expressions commonly used in astrochemical models. Both the rectangular barrier and the Eckart approximations lead to errors of about an order of magnitude. Finally, fits of the rate constants are provided as input for astrochemical models.

  14. The equivalence myth of quantum mechanics-part II

    Science.gov (United States)

    Muller, F. A.

    The author endeavours to show two things: first, that Schrödingers (and Eckarts) demonstration in March (September) 1926 of the equivalence of matrix mechanics, as created by Heisenberg, Born, Jordan and Dirac in 1925, and wave mechanics, as created by Schrödinger in 1926, is not foolproof; and second, that it could not have been foolproof, because at the time matrix mechanics and wave mechanics were neither mathematically nor empirically equivalent. That they were is the Equivalence Myth. In order to make the theories equivalent and to prove this, one has to leave the historical scene of 1926 and wait until 1932, when von Neumann finished his magisterial edifice. During the period 1926-1932 the original families of mathematical structures of matrix mechanics and of wave mechanics were stretched, parts were chopped off and novel structures were added. To Procrustean places we go, where we can demonstrate the mathematical, empirical and ontological equivalence of 'the final versions of' matrix mechanics and wave mechanics. The present paper claims to be a comprehensive analysis of one of the pivotal papers in the history of quantum mechanics: Schrödingers equivalence paper. Since the analysis is performed from the perspective of Suppes structural view ('semantic view') of physical theories, the present paper can be regarded not only as a morsel of the internal history of quantum mechanics, but also as a morsel of applied philosophy of science. The paper is self-contained and presupposes only basic knowledge of quantum mechanics. For reasons of length, the paper is published in two parts; Part I appeared in the previous issue of this journal. Section 1 contains, besides an introduction, also the papers five claims and a preview of the arguments supporting these claims; so Part I, Section 1 may serve as a summary of the paper for those readers who are not interested in the detailed arguments.

  15. Neutrino oscillations, and hadronic physics when considering a large number of colors in quantum chromodynamics

    Science.gov (United States)

    Martin, Daniel R.

    2005-11-01

    This document consists of three chapters. The first chapter includes a detailed description of neutrino oscillations with an emphasis on the naturalness of obtaining a small value Ue3 within the Maki-Nakagawa-Sakata mixing matrix. With the use of the seesaw mechanism, it is found that the upper bound on this particular element is approaching its lower limit when we assume a very natural set of criteria for the origins of leptonic mixing. Also obtained are some general expressions which could provide insight into the Majorana nature of neutrino oscillations. The second chapter explores the use of operator methods in a 1/ Nc expansion for magnetic moments in QCD. An analysis of the entire set of magnetic moments is provided, including an explicit calculation of all twenty seven corresponding operators. A prediction of the sixteen unknown magnetic moments is also given, which were found using only the Wigner-Eckart theorem and a simple least squares fit to the available data. Using the predicted magnetic moments, we were also able to predict the six radiative decay widths corresponding to the Sigma*+, Sigma *0, xi*0, and xi*-. In the third chapter; using a formalism established to include systematic corrections to the leading order S-matrix elements, we derive expressions for the pion photoproduction amplitudes in the 1/Nc expansion of QCD, and obtain linear relations directly from this expansion that relate electromagnetic multipole amplitudes at all energies. The leading-order relations in 1/Nc compare favorably with available data, while the next-to-leading order relations seem to provide only a small improvement. However, when resonance parameters are compared directly, the agreement at O(1/Nc) or O(1/ N2c ) is impressive.

  16. The 6Hankel asymptotic approximation for the uniform description of rainbows and glories in the angular scattering of state-to-state chemical reactions: derivation, properties and applications.

    Science.gov (United States)

    Xiahou, Chengkui; Connor, J N L

    2014-06-07

    This paper considers the asymptotic (semiclassical) analysis of a forward glory and a rainbow in the differential cross section (DCS) of a state-to-state chemical reaction, whose scattering amplitude is given by a Legendre partial wave series (PWS). A recent paper by C. Xiahou, J. N. L. Connor and D. H. Zhang [Phys. Chem. Chem. Phys., 2011, 13, 12981] stated without proof a new asymptotic formula for the scattering amplitude, which is uniform for a glory and a rainbow in the DCS. The new formula was designated "6Hankel" because it involves six Hankel functions. This paper makes three contributions: (1) we provide a detailed derivation of the 6Hankel approximation. This is done by first generalizing a method described by G. F. Carrier [J. Fluid Mech., 1966, 24, 641] for the uniform asymptotic evaluation of an oscillating integral with two real coalescing stationary phase points, which results in the "2Hankel" approximation (it contains two Hankel functions). Application of the 2Hankel approximation to the PWS results in the 6Hankel approximation for the scattering amplitude. We also test the accuracy of the 2Hankel approximation when it is used to evaluate three oscillating integrals of the cuspoid type. (2) We investigate the properties of the 6Hankel approximation. In particular, it is shown that for angles close to the forward direction, the 6Hankel approximation reduces to the "semiclassical transitional approximation" for glory scattering derived earlier. For scattering close to the rainbow angle, the 6Hankel approximation reduces to the "transitional Airy approximation", also derived earlier. (3) Using a J-shifted Eckart parameterization for the scattering matrix, we investigate the accuracy of the 6Hankel approximation for a DCS. We also compare with angular scattering results from the "uniform Bessel", "uniform Airy" and other semiclassical approximations.

  17. Semiclassical methods in chemical reaction dynamics

    Energy Technology Data Exchange (ETDEWEB)

    Keshavamurthy, Srihari [Univ. of California, Berkeley, CA (United States)

    1994-12-01

    Semiclassical approximations, simple as well as rigorous, are formulated in order to be able to describe gas phase chemical reactions in large systems. We formulate a simple but accurate semiclassical model for incorporating multidimensional tunneling in classical trajectory simulations. This model is based on the existence of locally conserved actions around the saddle point region on a multidimensional potential energy surface. Using classical perturbation theory and monitoring the imaginary action as a function of time along a classical trajectory we calculate state-specific unimolecular decay rates for a model two dimensional potential with coupling. Results are in good comparison with exact quantum results for the potential over a wide range of coupling constants. We propose a new semiclassical hybrid method to calculate state-to-state S-matrix elements for bimolecular reactive scattering. The accuracy of the Van Vleck-Gutzwiller propagator and the short time dynamics of the system make this method self-consistent and accurate. We also go beyond the stationary phase approximation by doing the resulting integrals exactly (numerically). As a result, classically forbidden probabilties are calculated with purely real time classical trajectories within this approach. Application to the one dimensional Eckart barrier demonstrates the accuracy of this approach. Successful application of the semiclassical hybrid approach to collinear reactive scattering is prevented by the phenomenon of chaotic scattering. The modified Filinov approach to evaluating the integrals is discussed, but application to collinear systems requires a more careful analysis. In three and higher dimensional scattering systems, chaotic scattering is suppressed and hence the accuracy and usefulness of the semiclassical method should be tested for such systems.

  18. Improving runoff estimates from regional climate models: a performance analysis in Spain

    Directory of Open Access Journals (Sweden)

    D. González-Zeas

    2012-06-01

    Full Text Available An important step to assess water availability is to have monthly time series representative of the current situation. In this context, a simple methodology is presented for application in large-scale studies in regions where a properly calibrated hydrologic model is not available, using the output variables simulated by regional climate models (RCMs of the European project PRUDENCE under current climate conditions (period 1961–1990. The methodology compares different interpolation methods and alternatives to generate annual times series that minimise the bias with respect to observed values. The objective is to identify the best alternative to obtain bias-corrected, monthly runoff time series from the output of RCM simulations. This study uses information from 338 basins in Spain that cover the entire mainland territory and whose observed values of natural runoff have been estimated by the distributed hydrological model SIMPA. Four interpolation methods for downscaling runoff to the basin scale from 10 RCMs are compared with emphasis on the ability of each method to reproduce the observed behaviour of this variable. The alternatives consider the use of the direct runoff of the RCMs and the mean annual runoff calculated using five functional forms of the aridity index, defined as the ratio between potential evapotranspiration and precipitation. In addition, the comparison with respect to the global runoff reference of the UNH/GRDC dataset is evaluated, as a contrast of the "best estimator" of current runoff on a large scale. Results show that the bias is minimised using the direct original interpolation method and the best alternative for bias correction of the monthly direct runoff time series of RCMs is the UNH/GRDC dataset, although the formula proposed by Schreiber (1904 also gives good results.

  19. Intra-rater reliability and diagnostic accuracy of a new vaginal dynamometer to measure pelvic floor muscle strength in women with urinary incontinence.

    Science.gov (United States)

    Romero-Cullerés, Georgia; Peña-Pitarch, Esteban; Jané-Feixas, Celia; Arnau, Anna; Montesinos, Jesus; Abenoza-Guardiola, Montserrat

    2017-02-01

    The first choice treatment in urinary incontinence (UI) is rehabilitation of the pelvic floor in order to improve muscle strength. However, no entirely reliable instruments for quantifying pelvic floor muscle (PFM) strength are currently available. Our aim was to test the intra-rater reliability and diagnostic accuracy of a new vaginal dynamometer for measuring PFM strength. Test-retest reliability study. One hundred and four women with stress urinary incontinence (SUI) were recruited. Patients were excluded if they had a history consistent with urge urinary incontinence or pelvic organ prolapse, pregnancy, previous urogynecological surgery, severe vaginal atrophy, or neurological conditions. The examination comprised digital palpation quantified by the modified Oxford scale and by two consecutive dynamometry measurements obtained using a new prototype dynamometer. This instrument comprises a speculum in which an inductive displacement sensor (LVDTSM210.10.2.KTmodel, Schreiber) is attached to a spring of known stiffness constant (k). The intraclass correlation coefficient (ICC) was calculated to assess intra-rater reliability. Diagnostic accuracy was assessed using Receiver Operating Characteristics (ROC) curves analysis. Of the 104 subjects included, 59.6% presented scores between 0-2 on the Oxford scale. Intra-rater reliability was 0.98 (95%CI: 0.97-0.99). In the Bland & Altman plot, the distribution of disagreements was similar in the lowest and the highest strength values. The diagnostic accuracy of the dynamometer with regard to digital palpation showed an area under the curve of 0.85 (95%CI: 0.77-0.93). Our results suggest that this new vaginal dynamometer is a reliable and valid instrument for quantifying PFM strength. Neurourol. Urodynam. 36:333-337, 2017. © 2015 Wiley Periodicals, Inc. © 2015 Wiley Periodicals, Inc.

  20. Environment informatin systems. Data requests and acquisition of information acording to the theme environment and health; Umweltinformationssysteme. Datenanforderungen und Informationsgewinnung zum Themenbereich Umwelt und Gesundheit

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2010-12-15

    Within the workshop of the working group 'Environmental Information System' of the specialized group 'Informatics in environmental protection' from 27th to 28th May, 2010, in Leipzig (Federal Republic of Germany) the following lectures were held: (1) Environment and health: Data for deeds (Hedi Schreiber); (2) Fundamental data to describe health-related environmental pollution of humans in Germany (Andre Conrad); (3) Noxen information system NIS - a material information system for the Public Health Service (Cerstin Finke); (4) Biocide portal ''Fly-swatter instead of spray can' (Gunnar Minx); (5) The web supported information portal nature protection and health (NatGesIS) in the Federal Office for Nature Conservation (Beate Job-Hoben); (6) The information system of ecologic building materials WECOBIS (Rainer Weidemann); (7) Integration of remote sensing data, geodata and health data in geographical information infrastructure for the prediction of environmentally influenced health hazards - EO2HEAVEN (Silke Richter); (8) Transnational data of the state of soil tools and requirements from the view of the Federal Environment Office (Falk Hilliges); (9) Information system for the monitoring of forests in Europa data management in the EU project FutMon (Friedhelm Hosenfeld); (10) Environmental performance and urban development - On the urban space distribution of health relevant environmental pollution in the region Berlin (Heinz-Josef Klimeczek); (11) InGrid {sup registered} - a software for the development of environmental information systems (Fred Kruse); (12) Linked environmental data (Maria Ruether); (13) HIPPOLYTOS - Intuitive, overlapping research of environmental data and geological data by means of semantic technologies (Gergely Lukacs); (14) Tool for a flexible data exchange between specialized information systems (Rene Poeschel); (15) A technical concept of research information systems of the EU project ICT-ENSURE (Richard

  1. Best Paper Selection.

    Science.gov (United States)

    2017-08-01

    Lin FP, Pokorny A, Teng C, Dear R, Epstein RJ. Computational prediction of multidisciplinary team decision-making for adjuvant breast cancer drug therapies: a machine learning approach. BMC Cancer 2016 Dec 1;16(1):929 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5131452/ Marco-Ruiz L, Pedrinaci C, Maldonado JA, Panziera L, Chen R, Bellika JG. Publication, discovery and interoperability of Clinical Decision Support Systems: A Linked Data approach. J Biomed Inform 2016 Aug;62:243-64 http://www.sciencedirect.com/science/article/pii/S153204641630065X?via%3Dihub McEvoy DS, Sittig DF, Hickman TT, Aaron S, Ai A, Amato M, Bauer DW, Fraser GM, Harper J, Kennemer A, Krall MA, Lehmann CU, Malhotra S, Murphy DR, O'Kelley B, Samal L, Schreiber R, Singh H, Thomas EJ, Vartian CV, Westmorland J, McCoy AB, Wright A. Variation in high-priority drug-drug interaction alerts across institutions and electronic health records. J Am Med Inform Assoc 2017 Mar 1;24(2):331-8 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5391726/ Zamborlini V, Hoekstra R, Da Silveira M, Pruski C, ten Teije A, van Harmelen F. Inferring recommendation interactions in clinical guidelines. Semantic Web 2016;7(4):421-46 https://www.google.de/url?sa=t&rct=j&q=&esrc=s&source=web&cd=3&cad=rja&uact=8&ved=0ahUKEwin39e8r77VAhXEaFAKHeLkAC0QFgg_MAI&url=http%3A%2F%2Fwww.semantic-web-journal.net%2Fsystem%2Ffiles%2Fswj891.pdf&usg=AFQjCNF7CEXY49F929iQL09sRbGCl2Lc2A. Georg Thieme Verlag KG Stuttgart.

  2. Aqueducts and geoglyphs : the response of Ancient Nasca to water shortages in the desert of Atacama (Peru)

    Science.gov (United States)

    Masini, Nicola; Lasaponara, Rosa

    2016-04-01

    The desert of Atacama is a plateau in South America, covering a 1,000-kilometre strip of land on the Pacific coast, west of the Andes mountains, between Chile and Peru. Due to the confluence of a cold ocean current (the Humboldt Current) along with other climatic factors, connected to the particular topography and geomorphology of the region, Atacama desert is one of the most arid areas of the world. In particular, in Nasca region (Southern Peru) the lack of water was (and still is) due to the following causes: (i) the scarce pluvial precipitations and the (ii) high infiltration capacity, and the consequent yearly significant reduction of the surface water (Schreiber & Lancho Rojas 2009). Over the millennia long periods of drought occurred and frequently the lack of water was persistent for several decades. Despite the arid and extreme nature of the environment, this region was populated by important civilizations, such as Paracas and Nasca, which flourished in the Early Intermediate period (200 BCE-500 AD) (Silvermann & Proulx 2002). In particular the Nasca civilization is well-known for its refined and colourful pottery, characterized by a rich icononographic repertory, and, above all, by the huge and mysterious geoglyphs drawn on the arid plateaus of the Rio Grande de Nasca Basin. In order to practice agriculture, the Nasca developed adequate strategies to cope with hostile environmental factors and water scarcity, building a very efficient aqueduct system. They were aided by the fact that underground water was likely enough close to the surface and accessible by constructing wells and underground aqueducts, known with quechua name of puquios (Schreiber & Lancho Rojas 2009; Lasaponara & Masini 2012a; 2012b) The effectiveness of the techniques of hydraulic engineering depended on the climate and the weather events that sometimes underwent drastic changes, as results of the cyclical phenomenon of El Niño Southern Oscillation (commonly called ENSO). Hence the

  3. Book Reviews

    Directory of Open Access Journals (Sweden)

    Redactie KITLV

    2001-10-01

    Full Text Available -Doris Jedamski, René Witte, De Indische radio-omroep; Overheidsbeleid en ontwikkeling, 1923-1942. Hilversum: Verloren, 1998, 202 pp. -Edwin Jurriëns, Philip Kitley, Television, nation, and culture in Indonesia. Athens, Ohio: Ohio University Center for International Studies, 2000, xviii + 411 pp. [Research in International Studies, Southeast Asia Series 104.] -Gerrit Knaap, Scott Merrillees, Batavia in nineteenth century photographs. Richmond, Surrey: Curzon, 2000, 282 pp. -C.C. MacKnight, David Bulbeck ,Land of iron; The historical archaelogy of Luwu and the Cenrana valley; Results of the Origin of Complex Society in South Sulawesi Project (OXIS. Hull and Canberra: Centre for South-East Asian Studies, University of Hull / School of Archaeology and Anthropology, Australian National University, 2000, vi + 141 pp., Ian Caldwell (eds -Niels Mulder, Toh Goda, Political culture and ethnicity; An anthropological study in Southeast Asia. Quezon City: New Day, 1999, xviii + 182 pp. -Niels Mulder, Norman G. Owen, The Bikol blend; Bikolanos and their history. Quezon City: New Day, 1999, x + 291 pp. -Anton Ploeg, Donald Tuzin, Social complexity in the making; A case study among the Arapesh of New Guinea. London: Routledge, 2001, xii + 159 pp. -Henk Schulte-Nordholt, Maarten Kuitenbrouwer, Tussen oriëntalisme en wetenschap; Het Koninklijk Instituut voor Taal-, Land- en Volkenkunde in historisch verband 1851-2001. Leiden: KITLV Uitgeverij, 2001, ix + 362 pp. -Sri Margana, Peter Carey ,The archive of Yogyakarta, Volume II, Documents relating to economic and agrarian affairs. New York: Oxford University Press, 2000, 566 pp., Mason C. Hoadley (eds -Eric Venbrux, Wilfried van Damme, Bijdragen over kunst en cultuur in Oceanië/Studies in Oceanic Art and Culture. Gent: Academia Press, 2000, 122 pp. -Edwin Wieringa, Raharjo Suwandi, A quest for justice; The millenary aspirations of a contemporary Javanese wali. Leiden: KITLV Press, 2000, x + 229 pp

  4. Chemical Kinetics of Hydrogen Atom Abstraction from Allylic Sites by3O2; Implications for Combustion Modeling and Simulation.

    Science.gov (United States)

    Zhou, Chong-Wen; Simmie, John M; Somers, Kieran P; Goldsmith, C Franklin; Curran, Henry J

    2017-03-09

    Hydrogen atom abstraction from allylic C-H bonds by molecular oxygen plays a very important role in determining the reactivity of fuel molecules having allylic hydrogen atoms. Rate constants for hydrogen atom abstraction by molecular oxygen from molecules with allylic sites have been calculated. A series of molecules with primary, secondary, tertiary, and super secondary allylic hydrogen atoms of alkene, furan, and alkylbenzene families are taken into consideration. Those molecules include propene, 2-butene, isobutene, 2-methylfuran, and toluene containing the primary allylic hydrogen atom; 1-butene, 1-pentene, 2-ethylfuran, ethylbenzene, and n-propylbenzene containing the secondary allylic hydrogen atom; 3-methyl-1-butene, 2-isopropylfuran, and isopropylbenzene containing tertiary allylic hydrogen atom; and 1-4-pentadiene containing super allylic secondary hydrogen atoms. The M06-2X/6-311++G(d,p) level of theory was used to optimize the geometries of all of the reactants, transition states, products and also the hinder rotation treatments for lower frequency modes. The G4 level of theory was used to calculate the electronic single point energies for those species to determine the 0 K barriers to reaction. Conventional transition state theory with Eckart tunnelling corrections was used to calculate the rate constants. The comparison between our calculated rate constants with the available experimental results from the literature shows good agreement for the reactions of propene and isobutene with molecular oxygen. The rate constant for toluene with O 2 is about an order magnitude slower than that experimentally derived from a comprehensive model proposed by Oehlschlaeger and coauthors. The results clearly indicate the need for a more detailed investigation of the combustion kinetics of toluene oxidation and its key pyrolysis and oxidation intermediates. Despite this, our computed barriers and rate constants retain an important internal consistency. Rate constants

  5. A combined DFT and restricted open-shell configuration interaction method including spin-orbit coupling: application to transition metal L-edge X-ray absorption spectroscopy.

    Science.gov (United States)

    Roemelt, Michael; Maganas, Dimitrios; DeBeer, Serena; Neese, Frank

    2013-05-28

    A novel restricted-open-shell configuration interaction with singles (ROCIS) approach for the calculation of transition metal L-edge X-ray absorption spectra is introduced. In this method, one first calculates the ground state and a number of excited states of the non-relativistic Hamiltonian. By construction, the total spin is a good quantum number in each of these states. For a ground state with total spin S excited states with spin S' = S, S - 1, and S + 1 are constructed. Using Wigner-Eckart algebra, all magnetic sublevels with MS = S,..., -S for each multiplet of spin S are obtained. The spin-orbit operator is represented by a mean-field approximation to the full Breit-Pauli spin-orbit operator and is diagonalized over this N-particle basis. This is equivalent to a quasi-degenerate treatment of the spin-orbit interaction to all orders. Importantly, the excitation space spans all of the molecular multiplets that arise from the atomic Russell-Saunders terms. Hence, the method represents a rigorous first-principles approach to the complicated low-symmetry molecular multiplet problem met in L-edge X-ray absorption spectroscopy. In order to gain computational efficiency, as well as additional accuracy, the excitation space is restricted to single excitations and the configuration interaction matrix is slightly parameterized in order to account for dynamic correlation effects in an average way. To this end, it is advantageous to employ Kohn-Sham rather than Hartree-Fock orbitals thus defining the density functional theory∕ROCIS method. However, the method can also be used in an entirely non-empirical fashion. Only three global empirical parameters are introduced and have been determined here for future application of the method to any system containing any transition metal. The three parameters were carefully calibrated using the L-edge X-ray absorption spectroscopy spectra of a test set of coordination complexes containing first row transition metals. These

  6. A Systematic Approach for Computing Zero-Point Energy, Quantum Partition Function, and Tunneling Effect Based on Kleinert's Variational Perturbation Theory.

    Science.gov (United States)

    Wong, Kin-Yiu; Gao, Jiali

    2008-09-09

    In this paper, we describe an automated integration-free path-integral (AIF-PI) method, based on Kleinert's variational perturbation (KP) theory, to treat internuclear quantum-statistical effects in molecular systems. We have developed an analytical method to obtain the centroid potential as a function of the variational parameter in the KP theory, which avoids numerical difficulties in path-integral Monte Carlo or molecular dynamics simulations, especially at the limit of zero-temperature. Consequently, the variational calculations using the KP theory can be efficiently carried out beyond the first order, i.e., the Giachetti-Tognetti-Feynman-Kleinert variational approach, for realistic chemical applications. By making use of the approximation of independent instantaneous normal modes (INM), the AIF-PI method can readily be applied to many-body systems. Previously, we have shown that in the INM approximation, the AIF-PI method is accurate for computing the quantum partition function of a water molecule (3 degrees of freedom) and the quantum correction factor for the collinear H(3) reaction rate (2 degrees of freedom). In this work, the accuracy and properties of the KP theory are further investigated by using the first three order perturbations on an asymmetric double-well potential, the bond vibrations of H(2), HF, and HCl represented by the Morse potential, and a proton-transfer barrier modeled by the Eckart potential. The zero-point energy, quantum partition function, and tunneling factor for these systems have been determined and are found to be in excellent agreement with the exact quantum results. Using our new analytical results at the zero-temperature limit, we show that the minimum value of the computed centroid potential in the KP theory is in excellent agreement with the ground state energy (zero-point energy) and the position of the centroid potential minimum is the expectation value of particle position in wave mechanics. The fast convergent property

  7. The short live of the climate lie; Die kurzen Beine der Klimaluege

    Energy Technology Data Exchange (ETDEWEB)

    Thuss, Holger; Courtillot, Vincent; Shaviv, Nir (and others)

    2011-07-01

    -Karl Ewert); (14) The normality of the variable weather (Klaus-Eckart Pulse); (15) From Air Pollution to Climate Change - Report of an insider (Henrik Borchert).

  8. MTS-MD of Biomolecules Steered with 3D-RISM-KH Mean Solvation Forces Accelerated with Generalized Solvation Force Extrapolation.

    Science.gov (United States)

    Omelyan, Igor; Kovalenko, Andriy

    2015-04-14

    We developed a generalized solvation force extrapolation (GSFE) approach to speed up multiple time step molecular dynamics (MTS-MD) of biomolecules steered with mean solvation forces obtained from the 3D-RISM-KH molecular theory of solvation (three-dimensional reference interaction site model with the Kovalenko-Hirata closure). GSFE is based on a set of techniques including the non-Eckart-like transformation of coordinate space separately for each solute atom, extension of the force-coordinate pair basis set followed by selection of the best subset, balancing the normal equations by modified least-squares minimization of deviations, and incremental increase of outer time step in motion integration. Mean solvation forces acting on the biomolecule atoms in conformations at successive inner time steps are extrapolated using a relatively small number of best (closest) solute atomic coordinates and corresponding mean solvation forces obtained at previous outer time steps by converging the 3D-RISM-KH integral equations. The MTS-MD evolution steered with GSFE of 3D-RISM-KH mean solvation forces is efficiently stabilized with our optimized isokinetic Nosé-Hoover chain (OIN) thermostat. We validated the hybrid MTS-MD/OIN/GSFE/3D-RISM-KH integrator on solvated organic and biomolecules of different stiffness and complexity: asphaltene dimer in toluene solvent, hydrated alanine dipeptide, miniprotein 1L2Y, and protein G. The GSFE accuracy and the OIN efficiency allowed us to enlarge outer time steps up to huge values of 1-4 ps while accurately reproducing conformational properties. Quasidynamics steered with 3D-RISM-KH mean solvation forces achieves time scale compression of conformational changes coupled with solvent exchange, resulting in further significant acceleration of protein conformational sampling with respect to real time dynamics. Overall, this provided a 50- to 1000-fold effective speedup of conformational sampling for these systems, compared to conventional MD

  9. Reconstructing the redox conditions of Paleoproterozoic oceans: Insights from the Zaonega Formation

    Science.gov (United States)

    Patel, Neel; Zerkle, Aubrey; Izon, Gareth; Romashkin, Alexander; Rychanchik, Dmtriy; Upraus, Kärt; Kirsimäe, Kalle; Wing, Boswell; Lepland, Aivo

    2015-04-01

    -rich intervals. References: Lepland, A., Joosu, L., Kirsimäe, K., Prave, A.R., Romashkin, A.E., Crne, A.E., Martin, A.P., Fallick, A.E., Somelar, P., Üpraus, K., Mänd, K., Roberts, N.M.W., van Zuilen, M.A., Wirth, R., Schreiber, A., 2014. Potential influence of sulphur bacteria on Palaeoproterozoic phosphogenesis. Nat. Geosci. 7 (1), 20-24. Scott, C., Wing, A.B., Bekker, A., Planavsky, N.J., Medvedev, P., Bates, S.M., Yun, M., Lyons, T.W., 2014. Pyrite multiple-sulfur isotope evidence for rapid expansion and contraction of the early Paleoproterozoic seawater sulfate reservoir. Earth Planet. Sci. Lett. (389), 95-104.

  10. Tank 241-TX-104, cores 230 and 231 analytical results for the final report

    Energy Technology Data Exchange (ETDEWEB)

    Diaz, L.A.

    1998-07-07

    This document is the analytical laboratory report for tank 241-TX-104 push mode core segments collected between February 18, 1998 and February 23, 1998. The segments were subsampled and analyzed in accordance with the Tank 241-TX-104 Push Mode Core Sampling and Analysis Plan (TSAP) (McCain, 1997), the Data Quality Objective to Support Resolution of the Organic Complexant Safety Issue (Organic DQO) (Turner, et al., 1995) and the Safety Screening Data Quality Objective (DQO) (Dukelow, et.al., 1995). The analytical results are included in the data summary table. None of the samples submitted for Differential Scanning Calorimetry (DSC) and Total Alpha Activity (AT) exceeded notification limits as stated in the TSAP. The statistical results of the 95% confidence interval on the mean calculations are provided by the Tank Waste Remediation Systems Technical Basis Group in accordance with the Memorandum of Understanding (Schreiber, 1997) and are not considered in this report. Appearance and Sample Handling Attachment 1 is a cross reference to relate the tank farm identification numbers to the 222-S Laboratory LabCore/LIMS sample numbers. The subsamples generated in the laboratory for analyses are identified in these diagrams with their sources shown. Core 230: Three push mode core segments were removed from tank 241-TX-104 riser 9A on February 18, 1998. Segments were received by the 222-S Laboratory on February 19, 1998. Two segments were expected for this core. However, due to poor sample recovery, an additional segment was taken and identified as 2A. Core 231: Four push mode core segments were removed from tank 241-TX-104 riser 13A between February 19, 1998 and February 23, 1998. Segments were received by the 222-S Laboratory on February 24, 1998. Two segments were expected for this core. However, due to poor sample recovery, additional segments were taken and identified as 2A and 2B. The TSAP states the core samples should be transported to the laboratory within three

  11. Use of electronic brachytherapy to deliver postsurgical adjuvant radiation therapy for endometrial cancer: a retrospective multicenter study

    Directory of Open Access Journals (Sweden)

    William C Dooley

    2010-09-01

    Full Text Available William C Dooley1, John P Thropay2, Gary J Schreiber3, Mohamed Y Puthawala4, Steven C Lane5, James C Wurzer6, Charles E Stewart7, Gordon L Grado8, Harish G Ahuja9, Gary M Proulx101University of Oklahoma Health Sciences Center, Oklahoma City, OK; 2Beverly Oncology and Imaging Center, Montebello, CA; 3Swedish Covenant Medical Center, Chicago, IL; 4Rhode Island Hospital, Providence, RI; 5Signature Healthcare Brockton Hospital, Brockton, MA; 6AtlantiCare Regional Medical Center, Egg Harbor Township, NJ; 7St Francis Medical Center, Tulsa, OK; 8Southwest Oncology Centers, Scottsdale, AZ; 9Aspirus Regional Medical Center, Wausau, WI; 10Exeter Hospital, Exeter, NH, USABackground: This retrospective, multicenter study evaluated the feasibility and safety of high-dose rate electronic brachytherapy (EBT as a postsurgical adjuvant radiation therapy for endometrial cancer.Methods: Medical records were reviewed from 41 patients (age 40–89 years with endometrial cancer (Federation of International Gynecology and Obstetrics stages IA–IIIC treated at nine centers between April 2008 and October 2009. Treatment included intracavitary vaginal EBT alone (n = l6 at doses of 18.0–24.0 Gy in 3–4 fractions and EBT in combination with external beam radiation therapy (EBRT, n = 25 at a total radiation dose range of 40.0–80.4 Gy. Doses were prescribed to a depth of 5 mm from the applicator surface and to the upper third (n = 15 and the upper half (n = 26 of the vagina.Results: Median follow-up was 3.8 (range 0.5–12.0 months. All 41 patients received the intended dose of radiation as prescribed. Adverse events occurred in 13 of 41 patients and were mild to moderate (Grade 1–2, consisting primarily of vaginal mucositis, rectal mucosal irritation and discomfort, and temporary dysuria and diarrhea. There were no Grade 3 adverse events in the EBT-only treatment group. One patient, who was being treated with the combination of EBT and EBRT for recurrent endometrial

  12. Multiple Citation Indicators and Their Composite across Scientific Disciplines.

    Directory of Open Access Journals (Sweden)

    John P A Ioannidis

    2016-07-01

    Full Text Available Many fields face an increasing prevalence of multi-authorship, and this poses challenges in assessing citation metrics. Here, we explore multiple citation indicators that address total impact (number of citations, Hirsch H index [H], co-authorship adjustment (Schreiber Hm index [Hm], and author order (total citations to papers as single; single or first; or single, first, or last author. We demonstrate the correlation patterns between these indicators across 84,116 scientists (those among the top 30,000 for impact in a single year [2013] in at least one of these indicators and separately across 12 scientific fields. Correlation patterns vary across these 12 fields. In physics, total citations are highly negatively correlated with indicators of co-authorship adjustment and of author order, while in other sciences the negative correlation is seen only for total citation impact and citations to papers as single author. We propose a composite score that sums standardized values of these six log-transformed indicators. Of the 1,000 top-ranked scientists with the composite score, only 322 are in the top 1,000 based on total citations. Many Nobel laureates and other extremely influential scientists rank among the top-1,000 with the composite indicator, but would rank much lower based on total citations. Conversely, many of the top 1,000 authors on total citations have had no single/first/last-authored cited paper. More Nobel laureates of 2011-2015 are among the top authors when authors are ranked by the composite score than by total citations, H index, or Hm index; 40/47 of these laureates are among the top 30,000 by at least one of the six indicators. We also explore the sensitivity of indicators to self-citation and alphabetic ordering of authors in papers across different scientific fields. Multiple indicators and their composite may give a more comprehensive picture of impact, although no citation indicator, single or composite, can be expected to

  13. Multiple Citation Indicators and Their Composite across Scientific Disciplines.

    Science.gov (United States)

    Ioannidis, John P A; Klavans, Richard; Boyack, Kevin W

    2016-07-01

    Many fields face an increasing prevalence of multi-authorship, and this poses challenges in assessing citation metrics. Here, we explore multiple citation indicators that address total impact (number of citations, Hirsch H index [H]), co-authorship adjustment (Schreiber Hm index [Hm]), and author order (total citations to papers as single; single or first; or single, first, or last author). We demonstrate the correlation patterns between these indicators across 84,116 scientists (those among the top 30,000 for impact in a single year [2013] in at least one of these indicators) and separately across 12 scientific fields. Correlation patterns vary across these 12 fields. In physics, total citations are highly negatively correlated with indicators of co-authorship adjustment and of author order, while in other sciences the negative correlation is seen only for total citation impact and citations to papers as single author. We propose a composite score that sums standardized values of these six log-transformed indicators. Of the 1,000 top-ranked scientists with the composite score, only 322 are in the top 1,000 based on total citations. Many Nobel laureates and other extremely influential scientists rank among the top-1,000 with the composite indicator, but would rank much lower based on total citations. Conversely, many of the top 1,000 authors on total citations have had no single/first/last-authored cited paper. More Nobel laureates of 2011-2015 are among the top authors when authors are ranked by the composite score than by total citations, H index, or Hm index; 40/47 of these laureates are among the top 30,000 by at least one of the six indicators. We also explore the sensitivity of indicators to self-citation and alphabetic ordering of authors in papers across different scientific fields. Multiple indicators and their composite may give a more comprehensive picture of impact, although no citation indicator, single or composite, can be expected to select all the

  14. The effects of question types in textual reading upon retention of biology concepts

    Science.gov (United States)

    Leonard, William H.; Lowery, Lawrence F.

    Do instructional questions to students enhance learning? If so, do certain types of questions cause greater learning outcomes than others? The area of instructional questions and questioning strategies has generated much research over the past two decades. A number of studies have found instructional questions to account for a large fraction of teaching time (Bellack et al., 1963; Schreiber, 1967; Moyer, 1967). Teacher use of oral questions in instruction, especially higher level cognitive questions, has consistently shown positive effects on student achievement (Redfield & Rousseau, 1981). Questions asked after oral prose presentations in psychology have been found to enhance recall of factual information (Sefkow & Meyers, 1980). Some large teacher training programs have specific instruction in questioning strategies (Lanier & Davis, 1972; Lowery, 1974). Questioning in textual reading has also been investigated, especially in the social sciences and languages, with respect to both the presence of questions in a text and the position and type of such questions. Although there are conflicting results, in general, questions placed within text materials have appeared to cause significantly higher performance than reading the materials without questions (Rothkopf & Bisbicos, 1967; Rothkopf & Bloom, 1970; Watts & Anderson, 1971; Quellmalz, 1972; Reynolds, Standiford, & Anderson, 1979; Corrozi, 1971). Questions placed after the reading have been found to be significantly more productive than prequestions, or questions placed immediately before the reading passages (Rothkopf & Bisbicos, 1967; Frase, Patrick, & Schumer, 1970; Watts & Anderson, 1971). In one study, placing questions before the associated information reduced paragraph reading time from the time required when questions followed the information passage (Morasky & Wilcox, 1970). Finally, higher level cognitive post- and prequestions (comprehensive and application) have consistently produced more learning than

  15. Surrogate Data Generation By Gradual Wavelet Reconstruction (GWR): A General Method with Applications to Simulation, Hypothesis Testing and Uncertainty Analysis

    Science.gov (United States)

    Keylock, C. J.

    2015-12-01

    This presentation will introduce the Gradual Wavelet Reconstruction (GWR) method and highlight the diversity of potential applications of the technique in hydrology, geophysics and beyond. The starting point for the method is the Iterated Amplitude Adjusted Fourier Transform (IAAFT) method introduced nearly twenty years ago by Schreiber and Schmitz (Physical Review Letters, 1996). Given a chosen significance level, α, and a γ = {1,2}-tailed statistical test, if (γ/α) -1 surrogate series have been generated with IAAFT, if the value for a metric of nonlinearity for the original data lies outside the range for the surrogates then a significant difference is deemed to exist (the data are assumed non-linear). GWR generalises this idea, by postulating a continuum from ρ = 0 (phase randomised data) to ρ = 1 (the original data). Thus, given rejection of the null hypothesis using IAAFT surrogates, the question of how nonlinear the data are may be answered for the first time by determining the critical value for ρ. This then opens up other research possibilities including: (1) A method for generating synthetic data with an appropriate degree of nonlinearity; (2) Novel approaches to confidence limits for extreme value problems based on the surrogates in (1); and, (3) The testing of the sensitivity of different metrics for nonlinearity. GWR surrogates are produced in the wavelet domain rather than the Fourier one. The parameter ρ is the total energy of the time series that is fixed in place and not randomised. That is, given a wavelet coefficient, wj,k at scale, j, and position, k, the total wavelet energy is the summation of w2j,k over all scales and positions, Σw2j,k. If all the w2j,k are placed in descending rank order, GWR fixes in place n wavelet coefficients such that the total energy of these coefficients is ρ×Σw2j,k. The other coefficients are randomised such that the fidelity of the wavelet filtering operation is preserved. Because it is a completely

  16. Proceedings of the 26th International Cryogenic Engineering Conference - International Cryogenic Material Conference 2016

    Science.gov (United States)

    Datta, T. S.; Sharma, R. G.; Kar, S.

    2017-02-01

    International Conference ICEC 26 - ICMC 2016 was organized at New Delhi, India during March 7-11, 2016. Previous conference ICEC25-ICMC 2014 was held at the University of Twente, The Netherlands in July 2014. Next Conference ICEC 27- ICMC 2018 will be held at Oxford, UK during September 3-7, 2018 1. Introduction This is a biennial international conference on cryogenic engineering and cryogenics materials organized by the International Cryogenic Engineering Committee and the International Cryogenic Material Committee. For some years, the host country has been alternating between Europe and Asia. The present conference was held at the Manekshaw Convention Centre, New Delhi, India during March 7-11, 2016 and hosted jointly by the Indian Cryogenics Council (ICC) and the Inter-University Accelerator Centre (IUAC), New Delhi. Put all together as many as 547 persons participated in the conference. Out of these 218 were foreign delegates coming from 25 countries and the rest from India. 2. Inaugural Session & Course Lectures The pre conference short course lectures on “Cryocoolers” and “Superconducting Materials for Power Applications” were organized on 7th March. Cryocooler course was given jointly by Dr. Chao Wang from M/s. Cryomech, USA and Prof. Milind Atrey from IIT Bombay, India. The Course on Superconducting Materials was given by Prof. Venkat Selvamanickam from the University of Houston, USA. The conference was inaugurated in the morning of March 8th in a typical Indian tradition and in the presence of the Chief Guest, Dr. R Chidambaram (Principle Scientific Adviser to Govt. of India), Guest of Honour, Prof. H Devaraj (Vice Chairman University Grant Commission), Prof Marcel ter Brake ( Chair, ICEC Board), Prof. Wilfried Goldacker (Chair, ICMC board), Dr. D Kanjilal (Director IUAC), Dr R K Bhandari, (President, Indian Cryogenic Council ). Dr. T S Datta, Chair Local Organizing Committee coordinated the proceedings of the inaugural function. 3. Technical

  17. Book Reviews

    Directory of Open Access Journals (Sweden)

    Dieuwke Wendelaar Bonga

    1998-10-01

    Hahl, Gouverneursjahre in Neuguinea. Edited by Wilfried Wagner. Hamburg: Abera Verlag Meyer, 1997, xxxi + 230 pp. - Elly Touwen-Bouwsma, Dieuwke Wendelaar Bonga, Eight prison camps; A Dutch family in Japanese Java. Athens, Ohio: University Center for International Studies, 1996, xii + 219 pp. - Freek Colombijn, Anthony J. Whitten, The ecology of Sumatra. Yogyakarta: Gadjah Mada University Press, 1987 [First edition 1984], xxiii + 583 pp., photographs, figures, tables, index., Sengli J. Damanik, Jazanul Anwar (eds. - David Henley, Anthony J. Whitten, The ecology of Sulawesi. Yogyakarta: Gadjah Mada University Press, 1987, xxi + 777 pp., Muslimin Mustafa, Gregory S. Henderson (eds. - Peter Boomgaard, Tony Whitten, The ecology of Java and Bali. [Singapore]: Periplus Editions, 1996, xxiii + 969 pp. [The Ecology of Indonesia Series 2.], Roehayat Emon Soeriaatmadja, Surya A. Afiff (eds. - Han Knapen, Kathy MacKinnon, The ecology of Kalimantan. [Singapore]: Periplus Editions, 1996, xxiv + 802 pp., tables, figures, boxes, index. [The Ecology of Indonesia Series 3.], Gusti Hatta, Hakimah Halim (eds. - Bernice de Jong Boers, Manon Ossewiejer, Kathryn A. Monk, The ecology of Nusa Tenggara and Maluku. [Singapore]: Periplus Editions, Oxford: Oxford University Press, 1997, xvii + 966 pages, tables, figures, boxes, annexes, appendixes, index. [The Ecology of Indonesia Series 5.], Yance de Fretes, Gayatri Reksodiharjo-Lilley (eds. - Freek Colombijn, Tomas Tomascik, The ecology of the Indonesian seas [2 volumes]. Hong Kong: Periplus, 1997, xiv + vi + 1388 pp., photographs, figures, tables, indexes. [The Ecology of Indonesia Series 7-8.], Anmarie Janice Mah, Anugerah Nontji (eds.

  18. VOC and VOX in fluid inclusions of quartz: New chemical insights into hydrothermal vein mineralization by GC-MS and GC-IRMS measurements

    Science.gov (United States)

    Sattler, Tobias; Kirnbauer, Thomas; Keppler, Frank; Greule, Markus; Fischer, Jan; Spiekermann, Patrik; Schreiber, Ulrich; Mulder, Ines; Schöler, Heinz Friedrich

    2015-04-01

    , thermogenic or abiotic, and to investigate the relationship between aquifer rocks and FIs. Our results add new information to the evolution of FIs in hydrothermal systems and the potential role of hydrothermal fluids to the origin of life [6]. [1] Mulder et al., 2013 Chem. Geol., 358: 148-155 [2] Kirnbauer, 1998, Geologie und hydro-thermale Mineralisationen im rechtsrheinischen Schiefergebirge. - 328 pp [3] Kirnbauer et al., 2012, Ore Geol. Reviews, 48: 239-257. [4] Jordan, 2003, Handbook of Environmental Chemistry, Vol. 3, Part P: 121-139 [5] Schöler & Keppler, 2003 Handbook of Environ-mental Chemistry, Vol. 3, Part P: 63-84; [6] Schreiber et al., 2012 Origins of Life and Evolution of Biosphere, 42: 47-54.

  19. Electronic brachytherapy as adjuvant therapy for early stage breast cancer: a retrospective analysis

    Directory of Open Access Journals (Sweden)

    William C Dooley

    2011-01-01

    Full Text Available William C Dooley1, James C Wurzer2, Mohamed Megahy3, Gary Schreiber4, Tapan Roy5, Gary Proulx6, Susan Laduzinsky7, Steven Lane8, James Dalzell9, Kambiz Dowlatshahi10, Dwelvin Simmons11, John P Thropay12, Harish Ahuja13, Peter Beitsch14, Randall W Holt15, Charles A Lee161Oklahoma University Health Sciences Center, Oklahoma City, OK, USA; 2Atlanticare, Egg Harbor Township, NJ, USA; 3Maryville Oncology, Maryville, IL, USA; 4Swedish Covenant Hospital, Chicago, IL, USA; 5Cape Girardeau Cancer Center, Cape Girardeau, MO, USA; 6Exeter Hospital, Exeter, NH, USA; 7St. Elizabeth's Medical Center, Swansea, IL, USA; 8Brockton Hospital, Brockton, MA, USA; 9Nazha Cancer Center, Northfield, NJ, USA; 10Rush University Medical Center, Chicago, IL, USA; 11Florida Radiation Oncology Group, Jacksonville, FL, USA; 12Beverly Oncology and Imaging Center, Montebello, CA, USA; 13Aspirus Cancer Center, Wausau, WI, USA; 14Dallas Surgical Group, Dallas, TX, USA; 15Pacific Crest Medical Physics, Chico, CA, USA; 16Gulf Coast Cancer Treatment Center, Panama City, FL, USAPurpose: This multicenter, retrospective study evaluated treatment and clinical outcomes of patients with early stage breast cancer who received adjuvant high-dose rate (HDR electronic brachytherapy (EBT treatment post-lumpectomy using the Axxent® EBT system. Dosimetric data from the EBT treatment plans were compared with those based on iridium-192 HDR brachytherapy.Material and methods: Medical records of 63 patients with early stage breast cancer (Tis, T1a, T1b, T1c, and T2 who were treated post-lumpectomy with EBT alone or in combination with external beam radiation therapy were reviewed. The prescribed EBT dose was 34 Gy (10 fractions over 5 days, 3.4 Gy each to 1 cm from the balloon surface. Dosimetry data from 12 patients were compared with these of treatment plans using an iridium-192 source prepared for the same 12 patients.Results: The majority of patients (90.5% were older than 50 years and had one

  20. Use of regenerative energy sources and hydrogen technology. Proceedings; Nutzung regenerativer Energiequellen und Wasserstofftechnik 2008. Tagungsband

    Energy Technology Data Exchange (ETDEWEB)

    Luschtinetz, Thomas; Lehmann, Jochen (eds.)

    2008-07-01

    biomass and low temperature waste heat (W. Nowak, A. Borsukiewicz-Gozdur, A.A. Stachel); (17) Opportunities for small and medium sized enterprises and the regions by linking renewable energy sources with nationally made fuel cells (E. Oettel); (18) Accumulators - State of the arts and perspectives (D. Ohms, G. Schaedlich); (19) Comparisons of different power fruit rotations in Mecklenburg-Vorpommern under economic and ecological aspects (J. Peters); (20) Algae in biogas purification (M. Schlegel, G. Mann, R. Schumann, N. Kanswohl, D. Wiedow); (21) Development of a software for a process engineering design of bio network sites (M. Schreiber, H.J. Krautz, R. Mueller); (22) HyWindBalance - Results from the wind-hydrogen project Oldenburg (K. Stolzenburg, J. Linnemann, R. Steinberger-Wilckens, L.V. Tudela, H.-P. Waldl, M. Lange, H. Kroeger, S. Styrnol, U. Ziebell, D. Heinemann, H.-G. Holtorf); (23) Prospects of combined concentrating solar power plant technologies and solar cooling applications in Thailand (S. Sukchai, A. Pongtornkulpanich); (24) The way to increase the efficiency of new power sources (L. Vasiliev); (25) Hydrogen - production via electrolysis (M. Wenske); (26) Use of geothermic resources to meet the requirement of heat and coldness of modern buildings - Initial experiences about the operation of the university library at the university Rostock (P. Wickboldt); (27) Shell cross anemometer - diagonal incident flow? (H.-J. Winkel, M. Paschen, M. Jensch); (28) Energy biomass from rewetted peatlands for combined heat and power generation (A. Wulf, W. Wichtmann, M. Barz, M. Ahlhaus); (29) Electric and magnetic fields near wind power farms (M. Zenczak); (30) Ecologic aspects of the selection of solutions of energetic systems of fishing cutters (W. Zenczak); (31) An innovative company in the area of product development and technology development (MET Motoren- und Energietechnik GmbH Rostock); (32) GA cooperation network energy economy / power technology of the state

  1. Rotational Seismology Workshop of February 2006

    Science.gov (United States)

    Evans, John R.; Cochard, A.; Graizer, Vladimir; Huang, Bor-Shouh; Hudnut, Kenneth W.; Hutt, Charles R.; Igel, H.; Lee, William H.K.; Liu, Chun-Chi; Majewski, Eugeniusz; Nigbor, Robert; Safak, Erdal; Savage, William U.; Schreiber, U.; Teisseyre, Roman; Trifunac, Mihailo; Wassermann, J.; Wu, Chien-Fu

    2007-01-01

    seismology (Cochard, Igel, Schreiber, Teisseyre, Wassermann, Majewski), sensor-calibration issues (Evans, Hutt), and finally the summary and conclusions (Savage). As a direct result of the 2006 Workshop and the formation of IWGoRS, we held a special session at the Fall 2006 AGU meeting (convened by H. Igel, W.H.K. Lee, and M.I. Todorovska). Currently, the first formal Workshop of the IWGoRS is being organized by W.H.K. Lee, M. Celebi, and M. I. Todorovska with sponsorship by the USGS and assistance from many others; this First International Workshop on Rotational Seismology and Engineering Applications will be held in September 2007 at Menlo Park, California (http://pubs.usgs.gov/of/2007/1144/). The following summarizes presentations and discussions during and shortly after the informal Workshop of February 2006.

  2. The theory of canonical perturbations applied to attitude dynamics and to the Earth rotation. Osculating and nonosculating Andoyer variables

    Science.gov (United States)

    Efroimsky, Michael,; Escapa, Alberto

    2007-08-01

    noninertial frame), a mere amendment of the Hamiltonian makes the equations yield nonosculating Andoyer elements. To make them osculating, extra terms should be added to the equations (but then the equations will no longer be canonical). Calculations in nonosculating variables are mathematically valid, but their physical interpretation is not easy. Nonosculating orbital elements parameterise instantaneous conics not tangent to the orbit. (A nonosculating i may differ much from the real inclination of the orbit, given by the osculating i.) Nonosculating Andoyer elements correctly describe perturbed attitude, but their interconnection with the angular velocity is a nontrivial issue. The Kinoshita Souchay theory tacitly employs nonosculating Andoyer elements. For this reason, even though the elements are introduced in a precessing frame, they nevertheless return the inertial velocity, not the velocity relative to the precessing frame. To amend the Kinoshita Souchay theory, we derive the precessing-frame-related directional angles of the angular velocity relative to the precessing frame. The loss of osculation should not necessarily be considered a flaw of the Kinoshita Souchay theory, because in some situations it is the inertial, not the relative, angular velocity that is measurable [Schreiber, K. U. et al.: J. Geophys. Res. 109, B06405 (2004); Petrov, L.: Astron. Astrophys. 467, 359 369 (2007)]. Under these circumstances, the Kinoshita Souchay formulae for the angular velocity should be employed (as long as they are rightly identified as the formulae for the inertial angular velocity).

  3. Doctrine of "Fair Price” by Thomas Aquinas: background, laws of development and specific interpretation

    Directory of Open Access Journals (Sweden)

    Nureev Rustem, M.

    2015-03-01

    analyzed the "contribution" of Thomas Aquinas in the development of the labor theory of value. Such an ambiguous approach to a "fair" price led to what some researchers considered the forerunner of Thomas Aquinas, the cost of labor history: I. M. Kulisher (1906, R. H. Tawney (1926, J.-B. Kraus (1930, S. Hagenauer (1931, A. Fanfani (1935, O.V. Trachtenberg (1957, Y. Mike. (1994 - and others have tried to try on his views with utility theory (since it appeared demand Aquinas had to implement trade trying to try two beginnings consumer and labor: H. Contzen (1869, E. Schreiber (1913, O. Scbilling (1923, R. De Roover (1958, R. M. Nureev (2005. Therefore, in the second half of the XX century, many researchers refuse to consider a "fair price" as the basis of cost, and steel is identified with its current market price: A. Sapori (1955, J. T. Noonan (1957, L. W. Baldwin (1959, Dr. T. Stetsyura (2010. The paper analyzes the arguments "pro" and "contra" in favor of each of these approaches.

  4. CO Band Head Spectroscopy of IC 342: Mass and Age of the Nuclear Star Cluster

    Science.gov (United States)

    Böker, Torsten; van der Marel, Roeland P.; Vacca, William D.

    1999-08-01

    We have used the NASA Infrared Telescope Facility (IRTF) to observe the nuclear stellar cluster in the nearby, face-on, giant Scd spiral IC 342. From high-resolution (lambda/Deltalambda=21,500) spectra of the ^12CO (2-0) band head at 2.3 mum, we derive a line-of-sight stellar velocity dispersion sigma=(33+/-3) km s^-1. To interpret this observation we construct dynamical models based on the Jeans equation for a spherical system. The light distribution of the cluster is modeled using an archival Hubble Space Telescope (HST) V-band image and a new ground-based K-band image. Under the assumption of an isotropic velocity distribution, the observed kinematics imply a K-band mass-to-light ratio M/L_K=0.05, and a cluster mass M~6x10^6 M_solar. We compare the derived mass-to-light ratio with the ``Starburst99'' stellar population synthesis models of Leitherer and collaborators and infer a best-fitting cluster age in the range 10^6.8-7.8 yr. Although this result depends somewhat on a number of uncertainties in the modeling (e.g., the assumed extinction along the line of sight toward the nucleus, the initial mass function of the stellar population model, and the velocity dispersion anisotropy of the cluster), none of the model parameters can be plausibly modified to yield a significantly larger age. Also, the inferred age is consistent with that found in our previous study based on the near-infrared absorption-line equivalent widths of the cluster (Böker, Förster-Schreiber, & Genzel). Recent HST observations of large samples of spiral galaxies have shown that nuclear stellar clusters are very common in intermediate- to late-type spirals. The cluster in IC 342 is more luminous than the clusters found in most other nearby spiral galaxies. If the nuclear stellar clusters in spiral galaxies all have a mass similar to that of the cluster in IC 342, then stellar population synthesis models indicate a median age for these clusters of several Gyr. This may be consistent with a

  5. Editorial: Focus on Laser- and Beam-Driven Plasma Accelerators

    Science.gov (United States)

    Joshi, Chan; Malka, Victor

    2010-04-01

    , S Mangles, L O Silva, R Fonseca and P A Norreys Electro-optic shocks from blowout laser wakefields D F Gordon, A Ting, M H Helle, D Kaganovich and B Hafizi Onset of self-steepening of intense laser pulses in plasmas J Vieira, F Fiúza, L O Silva, M Tzoufras and W B Mori Analysis of laser wakefield dynamics in capillary tubes N E Andreev, K Cassou, F Wojda, G Genoud, M Burza, O Lundh, A Persson, B Cros, V E Fortov and C-G Wahlstrom Characterization of the beam loading effects in a laser plasma accelerator C Rechatin, J Faure, X Davoine, O Lundh, J Lim, A Ben-Ismaïl, F Burgy, A Tafzi, A Lifschitz, E Lefebvre and V Malka Energy gain scaling with plasma length and density in the plasma wakefield accelerator P Muggli, I Blumenfeld, C E Clayton, F J Decker, M J Hogan, C Huang, R Ischebeck, R H Iverson, C Joshi, T Katsouleas, N Kirby, W Lu, K A Marsh, W B Mori, E Oz, R H Siemann, D R Walz and M Zhou Generation of tens of GeV quasi-monoenergetic proton beams from a moving double layer formed by ultraintense lasers at intensity 1021-1023Wcm-2 Lu-Le Yu, Han Xu, Wei-Min Wang, Zheng-Ming Sheng, Bai-Fei Shen, Wei Yu and Jie Zhang Carbon ion acceleration from thin foil targets irradiated by ultrahigh-contrast, ultraintense laser pulses D C Carroll, O Tresca, R Prasad, L Romagnani, P S Foster, P Gallegos, S Ter-Avetisyan, J S Green, M J V Streeter, N Dover, C A J Palmer, C M Brenner, F H Cameron, K E Quinn, J Schreiber, A P L Robinson, T Baeva, M N Quinn, X H Yuan, Z Najmudin, M Zepf, D Neely, M Borghesi and P McKenna Numerical modelling of a 10-cm-long multi-GeV laser wakefield accelerator driven by a self-guided petawatt pulse S Y Kalmykov, S A Yi, A Beck, A F Lifschitz, X Davoine, E Lefebvre, A Pukhov, V Khudik, G Shvets, S A Reed, P Dong, X Wang, D Du, S Bedacht, R Zgadzaj, W Henderson, A Bernstein, G Dyer, M Martinez, E Gaul, T Ditmire and M C Downer Effects of laser prepulses on laser-induced proton generation D Batani, R Jafer, M Veltcheva, R Dezulian, O Lundh, F Lindau, A

  6. Why does the Size of the Laacher See Magma Chamber and its Caldera Size not go together? - New Findings with regard to Active Tectonics in the East Eifel Volcanic Field

    Science.gov (United States)

    Schreiber, Ulrich; Berberich, Gabriele

    2013-04-01

    decade, a second new seismically active zone developed in the Bad Ems/Nassau region with local magnitudes up to 4.4 (BNS 2012). Our data generated from a combination of mapped active strike-slip faults and gas analyses along these gaspermeable faults provide, besides a seismic monitoring, integrated knowledge on the future evolution of the East Eifel volcanic field. The gas analyses (carbon dioxide, helium, radon, hydrogen sulphide and methane) of mofettes and mineral springs were performed in several campaigns during the period 2008 to 2012 in the East Eifel volcanic field (Berberich 2010, Schreiber & Berberich 2012). Based on the results specific distribution patterns can be identified, which allow conclusions to be drawn to tectonic and magmatic activities. Our results show a split of the East Eifel volcanic field into two parts. Helium (He) anomalies with concentrations exceeding up to seven-fold the atmospheric standard of 5,220 ppb (Holland & Emmerson 1987) are evident in the northern and in the northwestern part of Laacher See, whereas Helium anomalies with concentrations up to 70-fold of the atmospheric standard are evident southeast of Laacher See, indicating a large-scale anisotropy in the tectonic depression of Neuwied Basin. East of Laacher See, Radon anomalies up to 130 Bq/l are found. H2S anomalies are evident northeast of Laacher See. The highest gas anomalies are evident in the mofette field (500 m length) in the Lahn River in Bad Ems: Helium anomalies with concentrations exceeding up to 150-fold the atmospheric standard, Radon anomalies up to 500 Bq/l and H2S anomalies up to 18 ppm were found. References: Acocella V (2007): Understanding caldera structure and development: An overview of analogue models compared to natural calderas, Earth-Science Reviews, 85 (3-4): 125-160. Berberich G (2010): Identifikation junger gasführender Störungszonen in der West- und Hocheifel mit Hilfe von Bioindikatoren. Dissertation. Essen, 293 S. BNS (2012): Earthquake data

  7. 7. Rostock bioenergy forum. Proceedings; 7. Rostocker Bioenergieforum. Tagungsband

    Energy Technology Data Exchange (ETDEWEB)

    Nelles, Michael (ed.)

    2013-10-01

    the generation of biofuels (K. Schiemenz); (20) BioBoost - Biomass based energy intermediates boosting bio-fuel production (A. Niebel); (21) Hydrothermal conversion of biomass to liquid energy sources (M. Kroeger); (22) Production of diesel fuels from vegetable oils by means of homogenous catalysed metathesis of methyl oleate (F. Erben); (23) Investigation on application properties of liquid fuels with biogenic compounds (M. Neulen); (24) ENIAK - Development of a non-motor injector coking test facility for alternative fuels (H. Hoffmann); (25) Quality control of mixtures consisting of engine oil and rapeseed oil by means of online oil sensors (K. Thuneke); (26) Plasma regeneration of mineral adsorbents for the precipitation of formaldehyde from exhaust gases of biogas engines (S. Mueller); (27) Economical efficiency of bio energy as the level of prices in the agricultural sector rises (H. Heilmann); (28) Sorghum as an alternative of cultivation to maize (K. Jaekel); (29) New findings on the biogas production from sugar beets (H. Bormann); (30) Losses of the potential in methane formation during the storage of sugar beet pulp in open ground basins (F. Weissbach); (31) Overlapping effects during the fermentation of substrate mixtures (N. Engler); (32) Rising the exploitation of substrates by thermal digestate processing (I. Seick); (33) Application of a qualitative image analysis on the evaluation of microbial process parameters of biogas plants (Y.S. Kim); (34) Practical application of the microbial activity analysis on the monitoring of the process biological stability of biogas plants (L. Neumann); (35) Requirement-specific use of trace element biogas additives under consideration of the bioavailability (A. Feher); (36) Application of the membrane technology on the exhaustive fermentation of renewable raw materials in biogas plants (A. Schreiber); (37) The opportunity of rising efficiency at biogas plants without BHKW (K. Wemken); (38) Quantification of diffuse

  8. First Results of 3 Year Monitoring of Red Wood Ants' Behavioural Changes and Their Possible Correlation with Earthquake Events

    Science.gov (United States)

    Berberich, Gabriele; Berberich, Martin; Grumpe, Arne; Wöhler, Christian; Schreiber, Ulrich

    2013-04-01

    (including climate data, earth tides, lunar phases and biological parameters) are recorded and correlated with the analysed daily activity. Additionally, nest air measurements (CO2, Helium, Radon, H2S and CH4) are performed at intervals. At present, an automated image analysis routine is being applied to the acquired more than 45,000 hours of video stream data. It is a valuable tool to objectively identify and classify the ants' activity on top of mounds and to examine possible correlations with earthquakes. Based on this automated approach, a statistical analysis of the ants' behaviour is intended. The investigation and results presented here are a first access to a completely new research complex. The key question is whether the ants' behavioural changes and their correlation with earthquake events are statistically significant and if a detection by an automated system is possible. Long-term studies have to show whether confounding factors and climatic influences can clearly be distinguished. Although the first results suggest that it is promising to consolidate and extend the research to determine a pattern for exceptional situations, there is, however, still a long way to go for a usable automated earthquake warning system. References Berberich G (2010): Identifikation junger gasführender Störungszonen in der West- und Hocheifel mit Hilfe von Bioindikatoren. Dissertation. Essen, 293 S. Berberich G, Klimetzek D, Wöhler C., and Grumpe A (2012): Statistical Correlation between Red Wood Ant Sites and Neotectonic Strike-Slip Faults. Geophysical Research Abstracts Vol. 14, EGU2012-3518 Berberich G, Berberich M, Grumpe A, Wöhler C., and Schreiber U (2012): First Results of 3 Year Monitoring of Red Wood Ants' Behavioural Changes and Their Possible Correlation with Earthquake Events. Animals, ISSN 2076-2615,. Special Issue "Biological Anomalies Prior to Earthquakes") (in prep.) Dologlou E. (2010): Recent aspects on possible interrelation between precursory electric signals

  9. Preface: Proceedings of the Colloidal Dispersions in External Fields II Conference (Bonn-Bad Godesberg, 31 March 2 April 2008)

    Science.gov (United States)

    Löwen, H.

    2008-10-01

    ), E Noruzifar (Mainz), M Oettel (Mainz), O Otto (Leipzig), S Overduin (Düsseldorf), E C Oğuz (Düsseldorf), T Palberg (Mainz), G Pauschenwein (Vienna), G Pellicane (Messina), F Pesth (Mainz), P Pfleiderer (Mainz), D J Pine (New York), D Pini (Milan), H Reiber (Mainz), V Reshetnyak (Kiev), M Rex (Düsseldorf), M Ripoll (Jülich), M Roth (Mainz), P Royall (Bristol), M Rubin-Zuzic (Garching), T Schilling (Mainz), A Schmidt (Düsseldorf), M Schmiedeberg (Berlin), H J Schöpe (Mainz), S Schreiber (Bayreuth), B Schumann (Düsseldorf), F Sciortino (Rome), L Shapran-Reiber (Mainz), M Siebenbürger (Bayreuth), S P Singh (New Delhi), R Siquieri (Aachen), F Smallenburg (Utrecht), I Snook (Melbourne), M Sperl (Cologne), J Stellbrink (Jülich), E Stiakakis (Jülich), T Szymborski (Warsaw), H Tanaka (Tokyo), P Tierno (Barcelona), U Tkalec (Ljubljana), A Tsigkri (Jülich), T Tückmantel (Düsseldorf), C Valeriani (Edinburgh), A van Blaaderen (Utrecht), E van den Pol (Utrecht), J van Meel (Amsterdam), P van Oostrum (Utrecht), R van Roij (Utrecht), S van Teeffelen (Düsseldorf), L Verhoeff (Utrecht), E Vermolen (Utrecht), R Vink (Göttingen), P Virnau (Mainz), T Voigtmann (Cologne), D Vollmer (Mainz), G J Vroege (Utrecht), H R Vutukuri (Utrecht), C Walz (Konstanz), M Walz (Erlangen), D A Weitz (Harvard), J Wenk (Düsseldorf), R Wensink (London), F Weyßer (Konstanz), L Willner (Jülich), R G Winkler (Jülich), A Wynveen (Düsseldorf), A Wysocki (Düsseldorf), J Zausch (Mainz), J Zhao (Mainz), M Zietara (Konstanz), U Zimmermann (Düsseldorf), J Zwanikken (Utrecht).

  10. EDITORIAL: Focus on Quantum Correlations in Tailored Matter

    Science.gov (United States)

    Muramatsu, Alejandro; Pfau, Tilman

    2008-04-01

    Kollath, I P McCulloch, T Giamarchi and U Schollwöck Exploring the growth of correlations in a quasi one-dimensional trapped Bose gas M Eckart, R Walser and W P Schleich How to fix a broken symmetry: quantum dynamics of symmetry restoration in a ferromagnetic Bose-Einstein condensate Bogdan Damski and Wojciech H Zurek Landau levels of cold atoms in non-Abelian gauge fields A Jacob, P Öhberg, G Juzeliunas and L Santos Atomic four-wave mixing via condensate collisions A Perrin, C M Savage, D Boiron, V Krachmalnicoff, C I Westbrook and K V Kheruntsyan Semifluxons in superconductivity and cold atomic gases R Walser, E Goldobin, O Crasser, D Koelle, R Kleiner and W P Schleich Disorder-induced trapping versus Anderson localization in Bose-Einstein condensates expanding in disordered potentials L Sanchez-Palencia, D Clément, P Lugan, P Bouyer and A Aspect Critical tunneling currents in the regime of bilayer excitons L Tiemann, W Dietsche, M Hauser and K von Klitzing Quantum phases of trapped ions in an optical lattice R Schmied, T Roscilde, V Murg, D Porras and J I Cirac Generation and detection of a spin entanglement in nonequilibrium quantum dots Stefan Legel, Jürgen König and Gerd Schön Slow light in inhomogeneous and transverse fields Leon Karpa and Martin Weitz FFLO state in 1-, 2- and 3-dimensional optical lattices combined with a non-uniform background potential T K Koponen, T Paananen, J-P Martikainen, M R Bakhtiari and P Törmä Geometry-dependent interplay of long- and short-range interactions in ultracold fermionic gases: models for condensed matter and astrophysics B Deb, G Kurizki and I E Mazets Fermionic renormalization group methods for transport through inhomogeneous Luttinger liquids V Meden, S Andergassen, T Enss, H Schoeller and K Schönhammer Luttinger hydrodynamics of confined one-dimensional Bose gases with dipolar interactions R Citro, S De Palo, E Orignac, P Pedri and M-L Chiofalo Towards deterministically controlled InGaAs/GaAs lateral quantum dot

  11. Surfing a Black Hole

    Science.gov (United States)

    2002-10-01

    other stars in this area. The new NACO instrument [3] was installed in late 2001 at the VLT 8.2-m YEPUN telescope. Already during the initial tests, it produced many impressive images, some of which have been the subject of earlier ESO press releases [6]. "The first observations this year with NACO gave us right away the sharpest and 'deepest' images of the Milky Way Centre ever taken, showing a large number of stars in that area in great detail" , says Andreas Eckart of the University of Cologne, another member of the international team that is headed by Rainer Schödel, Thomas Ott and Reinhard Genzel from MPE. "But we were still to be overwhelmed by the wonderful outcome of those data! " Combining their infrared images with high-resolution radio data, the team was able to determine - during a ten-year period - very accurate positions of about one thousand stars in the central area with respect to the compact radio source SgrA* , see PR Photo 23c/02 . "When we included the latest NACO data in our analysis in May 2002, we could not believe our eyes. The star S2 , which is the one currently closest to SgrA*, had just performed a rapid swing-by near the radio source. We suddenly realised that we were actually witnessing the motion of a star in orbit around the central black hole, taking it incredibly close to that mysterious object" , says a very happy Thomas Ott , who is now working in the MPE team on his PhD thesis. In orbit around the central black hole No event like this one has ever been recorded . These unique data show unambiguously that S2 is moving along an elliptical orbit with SgrA* at one focus, i.e. S2 orbits SgrA* like the Earth orbits the Sun, cf. the right panel of PR Photo 23c/02 . The superb data also allow a precise determination of the orbital parameters (shape, size, etc.). It turns out that S2 reached its closest distance to SgrA* in the spring of 2002, at which moment it was only 17 light-hours [5] away from the radio source, or just 3 times the Sun

  12. Deepest Infrared View of the Universe

    Science.gov (United States)

    2002-12-01

    presented in this Press Release is based on a research article ("Ultradeep Near-Infrared ISAAC Observations of the Hubble Deep Field South: Observations, Reduction, Multicolor Catalog, and Photometric Redshifts" by Ivo Labbé et al.) that will soon appear in the research journal "Astronomical Journal" (cf. astro-ph/0212236). A shorter account will appear in the December 2002 issue of ESO's house journal "The Messenger". Information, including photos and reduced data, is also available at the website of the FIRES project. Notes [1]: This press release is issued in coordination between ESO, Leiden Observatory, the Netherlands Research School for Research in Astronomy (NOVA) and the Netherlands Foundation for Research (NWO). A Dutch-language version is available here. [2]: The team consists of Ivo Labbé, Marijn Franx, Natascha M. Förster Schreiber, Paul van der Werf, Huub Röttgering, Lottie van Starkenburg, Arjen van de Wel and Konrad Kuijken (Leiden Observatory, The Netherlands), Gregory Rudnick (Max-Planck-Institut für Astrophysik, Garching, Germany), Hans-Walter Rix (Max-Planck-Institut für Astronomie, Heidelberg, Germany), Alan Moorwood and Emanuele Daddi (ESO, Garching, Germany) and Pieter G. van Dokkum (California Institute of Technology, Pasadena, USA). [3]: In astronomy, the redshift denotes the fraction by which the lines in the spectrum of an object are shifted towards longer wavelengths. The observed redshift of a remote galaxy provides an estimate of its distance.

  13. EDITORIAL: Focus on Molecular Electronics FOCUS ON MOLECULAR ELECTRONICS

    Science.gov (United States)

    Scheer, Elke; Reineker, Peter

    2008-06-01

    : American Scientific Publishers) [7] Petty M C 2007 Molecular Electronics, (Weinheim: Wiley-VCH) [8] 2006 Molecular Wires and Nanoscale Conductors Faraday Discuss. 131 1-420 Focus on Molecular Electronics Contents Model of mixed Frenkel and charge-transfer excitons in donor-acceptor molecular crystals: investigation of vibronic spectra I J Lalov, C Warns and P Reineker Suppressing the current through molecular wires: comparison of two mechanisms GuangQi Li, Michael Schreiber and Ulrich Kleinekathöfer Charge-memory effect in a polaron model: equation-of-motion method for Green functions Pino D'Amico, Dmitry A Ryndyk, Gianaurelio Cuniberti and Klaus Richter Determination of transport levels of organic semiconductors by UPS and IPS S Krause, M B Casu, A Schöll and E Umbach Electrical characterization of alkane monolayers using micro-transfer printing: tunneling and molecular transport C Kreuter, S Bächle, E Scheer and A Erbe Correlated charge transfer along molecular chains L Mühlbacher and J Ankerhold Non-equilibrium Green's functions in density functional tight binding: method and applications A Pecchia, G Penazzi, L Salvucci and A Di Carlo Asymmetric Coulomb blockade and Kondo temperature of single-molecule transistors Florian Elste and Felix von Oppen Electron-phonon scattering in molecular electronics: from inelastic electron tunnelling spectroscopy to heating effects Alessio Gagliardi, Giuseppe Romano, Alessandro Pecchia, Aldo Di Carlo, Thomas Frauenheim and Thomas A Niehaus Interlinking Au nanoparticles in 2D arrays via conjugated dithiolated molecules Jianhui Liao, Markus A Mangold, Sergio Grunder, Marcel Mayor, Christian Schönenberger and Michel Calame Conductance values of alkanedithiol molecular junctions M Teresa González, Jan Brunner, Roman Huber, Songmei Wu, Christian Schönenberger and Michel Calame Particularities of surface plasmon-exciton strong coupling with large Rabi splitting C Symonds, C Bonnand, J C Plenet, A Bréhier, R Parashkov, J S Lauret, E

  14. Astrophysical phenomena related to supermassive black holes

    Science.gov (United States)

    Pott, Jörg-Uwe

    2006-12-01

    The thesis contains the results of my recent projects in astrophysical research. All projects aim at pushing the limits of our knowledge about the interaction between a galaxy, the fundamental building block of today's universe, and a supermassive black hole (SMBH) at its center. Over the past years a lot of observational evidence has been gathered for the current understanding, that at least a major part of the galaxies with a stellar bulge contain central SMBHs. The typical extragalactic approach consists of searching for the spectroscopic pattern of Keplerian rotation, produced by stars and gas, when orbiting a central dark mass (Kormendy & Richstone 1995). It suggests that a significant fraction of large galaxies host in their very nucleus a SMBH of millions to billions of solar masses (Kormendy & Gebhardt 2001). In the closest case, the center of our Milky Way, the most central stars, which can be imaged, were shown to move on orbits with circulation times of a few decades only, evidencing a mass and compactness of the dark counter part of the Keplerian motion, which can only be explained by a SMBH (Eckart & Genzel 1996; Ghez et al. 2000; Schödel et al. 2002). Having acknowledged the widespread existence of SMBHs the obvious next step is investigating the interaction with their environment. Although the basic property of a SMBH, which is concentrating a huge amount of mass in a ludicrously small volume defined by the Schwarzschild radius, only creates a deep gravitational trough, its existence evokes much more phenomena than simply attracting the surrounding matter. It can trigger or exacerbate star formation via tidal forces (Morris 1993). It shapes the distribution of its surrounding matter to accretion discs, which themselves release gravitational potential energy as radiation, possibly due to magnetic friction (Blandford 1995). The radiation efficiency of such active galactic nuclei (AGN) can become roughly 100 times more efficient than atomic nuclear