32,492 research outputs found
A 2 h periodic variation in the low-mass X-ray binary Ser X-1
No full textSpectroscopy of the low-mass X-ray binary Ser X-1 using the Gran Telescopio Canarias have revealed a ?2 h periodic variability that is present in the three strongest emission lines. We tentatively interpret this variability as due to orbital motion, making it the first indication of the orbital period of Ser X-1. Together with the fact that the emission lines are remarkably narrow, but still resolved, we show that a main-sequence K dwarf together with a canonical 1.4 M? neutron star gives a good description of the system. In this scenario, the most likely place for the emission lines to arise is the accretion disc, instead of a localized region in the binary (such as the irradiated surface or the stream-impact point), and their narrowness is due instead to the low inclination (?10°) of Ser X-1
Origin of the stereoselectivity of the intramolecular 1,2-hydrogen shift in singlet chlorocarbenes. A theoretical study
No full textThe stereochemistry of 1,2-H migration in ethylchlorocarbene (1) and chloromethylchlorocarbene (2) has been studied by ab initio methods. Geometries of the ground and transition states of a conformational equilibrium and the 1,2 rearrangement were optimized at the DFT (B3LYP) and MP2 levels of theory using 6-31G(D) and 6-311+G(D,P) basis sets. Final energies were obtained at the MP4/6-311+G(D,P)//MP2/6-311+G(D,P) level. It has been shown that the equilibrium between cis- and trans-conformers of 1 and 2 is shifted moderately toward the trans-conformer for carbene 1 and strongly toward the cis-conformer in the case of 2. The calculated barriers of rotation about the CC bond in carbene 1 (Delta G double dagger = 2.3 kcal mol(-1)) and 2 (5.3 kcal mol(-1)) are lower than the smallest predicted barriers of the 1,2-H shift (8.0 and 8.5 kcal mol(-1), respectively). In accordance with the Curtin-Hammett principle, kinetic control of stereochemistry of the rearrangement proceeding classically is realized. The predicted preferable formation of the Z-isomer of 1-chloropropene (3) and 1,2-dichloroethylene (4) is in good agreement with the experimental data obtained under conditions of the high-temperature thermolysis of the corresponding diazirines. Electronic factors influencing the relative stability of the cis- and trans-isomers of carbenes 1 and 2 and their transition states for 1,2-H migration are discussed.PT: J; CR: ABELL PJ, 1969, J CHEM THERMODYN, V28, P333 BECKE AD, 1988, PHYS REV A, V38, P3098 BECKE AD, 1993, J CHEM PHYS, V98, P5648 BONNEAN Y, 1996, J AM CHEM SOC, V118, P3829 BONNEAU R, 1989, J AM CHEM SOC, V111, P5973 CRAIG NC, 1971, J PHYS CHEM-US, V75, P1453 CRUMP JW, 1963, J ORG CHEM, V28, P953 DIX EJ, 1993, J AM CHEM SOC, V115, P10424 DIX EJ, 1994, RES CHEM INTERMEDIAT, V20, P149 DIX EJ, 1994, THESIS U ROCHESTER N ELIEL EL, 1994, STEREOCHEMISTRY ORGA EPIOTIS ND, 1974, J AM CHEM SOC, V96, P4075 EVANSECK JD, 1990, J AM CHEM SOC, V112, P9148 EVANSECK JD, 1990, J PHYS CHEM-US, V94, P5518 FREY HM, 1970, J CHEM SOC A, P1916 FRISCH MJ, 1995, GAUSSIAN 94 REVISION JONES WM, 1980, REARRANGEMENT GROUND, P95 JORGENSEN WL, 1973, ORGANIC CHEM BOOK OR LAVILLA JA, 1989, J AM CHEM SOC, V111, P6877 LEE C, 1988, PHYS REV B, V37, P785 LIU MTH, 1974, CAN J CHEM, V52, P246 LIU MTH, 1989, J ORG CHEM, V54, P486 LIU MTH, 1990, J AM CHEM SOC, V112, P3915 LIU MTH, 1994, ACCOUNTS CHEM RES, V27, P287 MCQUARRIE DA, 1973, STATISTICAL THERMODY MOSS RA, 1994, ADV CARBENE CHEM, V1 NICKON A, 1993, ACCOUNTS CHEM RES, V26, P84 NICKON A, 1993, TETRAHEDRON LETT, V34, P1391 PITZER KS, 1954, J AM CHEM SOC, V76, P1493 PROCHAZKA M, 1980, COLLECT CZECH CHEM C, V45, P1388 ROSENBERG MG, 1996, TETRAHEDRON LETT, V37, P3235 SHIN SH, 1996, J AM CHEM SOC, V118, P7626 STORER JW, 1993, J AM CHEM SOC, V115, P10426 TOMIOKA H, 1980, J AM CHEM SOC, V102, P7818 TOMIOKA H, 1984, J CHEM SOC CHEM COMM, P476 TOMIOKA H, 1985, TETRAHEDRON LETT, P1651 TOMIOKA H, 1986, J CHEM SOC CHEM COMM, P693 VOSKO SH, 1980, CAN J PHYS, V58, P1200 WOOD RE, 1941, J AM CHEM SOC, V63, P1650 YAMAMOTO Y, 1970, TETRAHEDRON, V26, P1235 ZEFIROV NS, 1977, TETRAHEDRON, V33, P2719; NR: 41; TC: 17; J9: J PHYS CHEM A; PG: 5; GA: WQ630Source type: Electronic(1
Journal of Psychotherapy Practice and Research 5 (4)
No full textVolume 5(4): Winter 1996. This item contains the PDF files for the entire issue. Limited to on-campus access only. Off-campus users must use VPN to access files within this item.Tasman, A., & Kay, J. A Need for Advocacy. 277-278.
Rush, A. J., Gabbard, G. O., Thase, M. E., & Sledge, W. H. Research and the Practice of Psychotherapy. 279-281.
Gabbard, G. O. Response. 281-282.
Thase, M. E. Response. 283-284.
Sledge, W. H. Response. 285-286.
Horwitz, L., Gabbard, G. O., Allen, J. G., Colson, D. B., Frieswyk, S. Newsom, G. E., & Coyne, L. Tailoring the Psychotherapy to the Borderline Patient. 287-306.
Mergenthaler, E., & Kachele, H. Applying Multiple Computerized Text-Analytic Measures to Single Psychotherapy Cases. 307-317.
Caligor, E. Annotated Psychodynamic Bibliography for Residents in Psychiatry. 318-340.
Kay, J., Gabbard, G. O., & Greist, J. Is Psychoanalytic Psychotherapy Relevant to the Treatment of OCD? 341-354.
Book Reviews. 355-357.
Letter. 358
Seeking according to G. H.
No full textThe aim of the M.A. thesis The Seeking according to G. H. is to introduce the prose The Passion According to G. H. by Brazilian writer Clarice Lispector (1920-1977) and examine this literary work in relation to biblical motives which appear in the novel. First, the author presents Lispectorʼs life and work and mentions her contribution to the Brazilian literary canon. Then he thoroughly analyses and interprets the prose The Passion According to G. H. In the next section, he focuses on selected Biblical motives and shows semantic shifts in the work. The thesis is subsequently concluded by a brief reflection on the function of Biblical themes. Keywords: Clarice Lispector, The Passion According to G. H., Brazilian literature of the twentieth century, intertextuality, biblical theme
Groups of transformations of a G-structure whic H leave invariant a substructure
No full textThe author considers an m-dimensional manifold M, two closed subgroups G, H of GL(m;R) with G containing H, and a G-structure p:A!M. A Lie group of transformations of A is said to be inessential if there exists anH-structure B in A such that Aut(B). The aim of this paper is to impose conditions onM, G,H,A and so that is inessential.Depto. de Álgebra, Geometría y TopologíaFac. de Ciencias MatemáticasTRUEpu
Sorption Enhanced Water Gas Shift for H2 production using sour gases as feedstock
No full textEven though hydrogen is considered the future of energy carrier, it is still produced from fossil fuels therefore with no benefits for the CO2 emission reduction. This paper discusses an innovative concept for hydrogen production which combines the Acid Gas to Syngas (AG2S (TM)) concept and the Sorption Enhanced Water Gas Shift (SEWGS) process. The AG2S (TM) process produces H-2 and elemental Sulfur from H2S and CO2, then H-2 purification is performed through amine scrubbing. The SEWGS technology is a Pressure Swing Adsorption process where the CO2 and H2S are adsorbed on hydrotalcite-based material. With respect to amine scrubbing, SEWGS takes advantage of a higher operating temperature of 350 degrees C -400 degrees C which reduces temperature swing losses, lower regeneration energy and the possibility to recycle the H2S while capturing the CO2. This study aims at exploring the potential of the SEWGS technology by means of the evaluation of detailed mass and energy balances, showing the potentialities of the AG2S (TM)+SEWGS technologies which more than double the H-2 production efficiency (25.0%) with respect to the amine scrubbing configuration (10.7%). Including the steam production, the overall process efficiency can be higher than 90% which is again more than twice the value of the AG2S (TM) reference case. (C) 2019 The Author(s). Published by Elsevier Ltd on behalf of Hydrogen Energy Publications LLC
H. G. Adler (1910-1988)
No full textThe result of my extensive research project is the first comprehensive study on the life and work of H. G. Adler, an important member of the circle around Elias and Veza Canetti, Erich Fried etc., whose ground-breaking scholarly work long overshadowed his reputation as a creative writer. Adler, a German-Jewish writer, born in Prague in 1910, was the inmate of various National Socialist concentration camps (Theresienstadt, Auschwitz) during the Second World War and lived in exile in London from 1947 until his death in 1988.
Both as a scholar and as a creative writer, this prolific author is one of the most interesting and most versatile personalities in postwar history. In addition to publishing seminal works on the Holocaust, he left behind an important and to a large extent unpublished body of work, consisting of narrative prose, poetry and drama as well as scholarly articles and books on history, sociology, politics, psychology, language and literature, music, arts, philosophy, theology and Jewish studies. The works of H. G. Adler address central contemporary concerns, cover a large number of areas of interest (European cultural and intellectual history, 20th century German literature, exile studies, Holocaust research etc.) and shall thus - so I hope - attract considerably more attention in the future.
This monograph attempts to close a major gap in exile studies that has often been complained about in the past. Its most important topical areas are: H. G. Adler's biography, Theresienstadt (Terezín), exile in England, the development and interdependence of scholarly work and literature, H. G. Adler's position amongst writers such as Karl Kraus, Franz Kafka, George Orwell, Elias Canetti and W. G. Sebald, H. G. Adler as Franz Baermann Steiner's literary executor, H. G. Adler's position amongst London émigrés, H. G. Adler and Austria (despite his exile in England, Adler throughout his life remained closely associated with Austrian culture).
This study focuses on Adler's most important and best known works "Theresienstadt 1941-1945" and "Die verheimlichte Wahrheit", books and articles like "Die Dichtung der Prager Schule" and "Der Kampf gegen die 'Endlösung der Judenfrage'", which have hitherto been neglected by academic research, the voluminous autobiographically structured or autobiographically influenced novels "Panorama", "Eine Reise" and "Die unsichtbare Wand" as well as numerous unpublished texts, documents and photographs from Adler's literary estate. It is rounded off by a complete bibliography of H. G. Adler's publication from 1947 to 1988.
The time for a monograph about H. G. Adler is ideal: 2008 - 20th anniversary of H. G. Adler's death; 2010 - H. G. Adler's 100th birthday
Contribution of Information and Communication Technology (ICT) in Country’S H-Index
No full textThe aim of this study is to examine the effect of Information and Communication Technology (ICT) development on country’s scientific ranking as measured by H-index. Moreover, this study applies ICT development sub-indices including ICT Use, ICT Access and ICT skill to find the distinct effect of these sub-indices on country’s H-index. To this purpose, required data for the panel of 14 Middle East countries over the period 1995 to 2009 is collected. Findings of the current study show that ICT development increases the H-index of the sample countries. The results also indicate that ICT Use and ICT Skill sub-indices positively contribute to higher H-index but the effect of ICT access on country’s H-index is not clear
The construction of Karen Karnak: The multi-author-function
No full textThis thesis is situated within the comparatively recent developments of Web 2.0 and the emergence of interactive WikiMedia, and explores the mode of authorship within a Read/Write culture compared to that of a Read/Only tradition. The hypothesis of this study is that the role of the audience has become merged with the author, and as such, represents new functions and attributes, distinct from a more conventional concept of authorship, in which the roles of audience and author are more separate. Read/Write and participatory culture, as defined by this study, is focused on collaboration, and includes the influences of D.I.Y. culture, Open-Source practices and the production of text by multiple authors. Multi-authorship presents a re-thinking of several concepts which support the notion of the individual author, since the focus of multi-authorship is not on attribution and ownership of a finished text, but on the continued malleability of a text. Modes of multi-authorship, demonstrated in the use of the pseudonyms Alan Smithee and Karen Eliot, represent declarative authors whose names signify multiple origins, whilst concurrently indicating a distinct body of work. The function of these names form an important context to this study, since primary research involves the construction of an experimental mode of multi-authorship utilising WikiMedia technology and the interaction of thirty nine participants, who are invited to create a body of work under the collective pseudonym Karen Karnak. The data generated by this experiment is analysed using aspects of Michel Foucault's author-function to identify and determine power structures inherent in the WikiMedia context. The interplay of power structures, including concepts such as identity, ownership and the body of work, affect the resulting mode of authorship and contribute to the construction of Karen Karnak, suggesting further areas of research into the emerging multi-author
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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