1,354,187 research outputs found
Jerzy Bossak. Sketch for a portrait
No full textThe article presents a profile of Jerzy Bossak (1910–1989), an outstanding Polish filmmaker, head of the Polish Film Chronicle and the Kamera film team, and a long-time distinguished pedagogue at the Łódź Film School
Phase transition at high pressure in Cu2CO3(OH)(2) related to the reduction of the Jahn-Teller effect
No full textHydroxycarbonates with the general formula Me-2(CO3)(OH)(2) are widely used materials in industrial processes and are widespread in nature. The Cu term, malachite, Cu2CO3(OH)(2), is monoclinic, P2(1)/a. Substitution of Cu2+ with other bivalent cations such as Mg, Zn, Fe, Cu or Ni is possible and leads to a different structure type, rosasite, P2(1)/a or P2(1)/b11 in the same cell setting as malachite. Rosasite structure is topologically similar to malachite, but the symmetry elements are oriented differently with respect to structural units. The stability of the malachite-like structure (MS) compared with the rosasite-like structure (RS) has been suggested to be related to the Jahn-Teller effect in CuO6 coordination polyhedra. For this reason the hypothesis of the phase transition of malachite, Cu2CO3(OH)(2), to a rosasite structure at high pressure, as a result of the reduced Jahn-Teller effect, has been tested and confirmed by powder and single-crystal diffraction structural studies: above 6 GPa the malachite structure is no longer stable and transforms to a RS structure. RS Cu2CO3(OH)(2) is 3% more dense than malachite and the bulk modulus is remarkably higher, 80 (2) GPa compared with 48 (4) GPa. The longer apical Cu-O bonds in the distorted Me1 octahedral site are progressively shortened with increasing pressure, revealing a decrease in the Jahn-Teller effect at high pressure. The transition has a first-order character, is reversible with a significant hysteresis, and there is no evidence of any intermediate phase between the two structures. We then have further evidence that in the Me-2(CO3)(OH)(2) compounds, the two main structural types, MS and RS, are closely related. The former structure is stabilized only when Cu is the prevalent cation in the octahedral sites, and it can transform directly to the RS as a function of thermodynamic changes
Jerzy Bossak. Szkic do portretu (1910–1989)
No full textThe article presents a profile of Jerzy Bossak (1910–1989), an outstanding Polish filmmaker, head of the Polish Film Chronicle and the Kamera film team, and a long-time distinguished pedagogue at the Łódź Film School.The article presents a profile of Jerzy Bossak (1910–1989), an outstanding Polish filmmaker, head of the Polish Film Chronicle and the Kamera film team, and a long-time distinguished pedagogue at the Łódź Film School
(Un)forgotten Jerzy Bossak
No full textJerzy Bossak (właść. Jerzy Burger-Naum; 1910-1989), tworzył także pod pseudonimami (najbardziej znany - Jerzy Szelubski); reżyser filmów dokumentalnych, twórca Polskiej Kroniki Filmowej, organizator życia filmowego, według Andrzeja Wajdy był jedynym prawdziwym producentem filmowym w latach PRL. Artykuł przybliża mniej nagłośnione aspekty życia niesłusznie zapomnianego reżysera, proponując również interpretację pewnych wątków jego twórczości.Jerzy Bossak (Jerzy Burger-Naum; 1910-1989), he also wrote under pseudonyms (best known - Jerzy Szelubski); director of documentary films, creator of the Polish Film Chronicle, organizer of film life, according to Andrzej Wajda, he was the only real film producer in the communist period. The article introduces the less publicized aspects of the life of an unjustly forgotten director, also proposing an interpretation of certain threads in his work.Jerzy Bossak (Jerzy Burger-Naum; 1910-1989), písal aj pod pseudonymami (najznámejší - Jerzy Szelubski); režisér dokumentárnych filmov, tvorca Poľskej filmovej kroniky, organizátor filmového života, podľa Andrzeja Wajdu bol jediným skutočným filmovým producentom v období komunizmu. Článok približuje menej medializované stránky života neprávom zabudnutého režiséra a ponúka aj výklad niektorých tém v jeho tvorbe
Ethnography of Horse Racing Gamblers’ Lives. Constructing Biographical Narratives in the Process of Interviewing
No full textIn this paper, we analyze the narrative strategies employed by horse racing gamblers in the context of their interactions within interviews. The empirical base consisted of 20 semi-structured interviews conducted with long-term regular gamblers from Warsaw, Poland. First, we state our position in the context of interviews with people aware they may be assessed negatively regarding a very important part of their lives. Second, we discuss how the interlocutors presented their biographies and employed discursive methods of protection against negative interpretation. The research reveals how bettors justify their passion by referring to individual myths about the origins of their interest in gambling. We reveal how bettors consciously employ emotive discursive methods that alleviate the discourse of addiction. Emotions are not presented as triggered by compulsively realized needs but as a result of intellectual passion, pursued by like-minded people joined by a drive for agency
Coordinative unsaturated CuI entities are crucial intermediates governing cell internalization of copper. A combined experimental ESI-MS and DFT study
No full textModel peptides relevant to hCtr1 transchelate CuI from the anti-tumour [CuI(PTA)4]+ complex before metal internalization into tumor cells. ESI(+)MS experiments corroborated by DFT calculations indicate that tetracoordinated-CuII and linear-CuI arrangements of in situ generated copper-peptide products play a crucial role in promoting the transfer of copper from the terminal MDH portion into adjacent HSH peptide sequence
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
No full text“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
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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