Description of the GDC program for the graphic display of three-dimensional models prepared by the combinatorial geometry technique

Computer programming for graphic display of combinatorial geometr

Reaction Rates and Nuclear Properties Relevant for Nucleosynthesis in Massive Stars and Far From Stability

Explosive nuclear burning in astrophysical environments produces unstable nuclei which again can be targets for subsequent reactions. In addition, it involves a large number of stable nuclides which are not fully explored by experiments, yet. Thus, it is necessary to be able to predict reaction cross sections and thermonuclear rates with the aid of theoretical models. Such predictions are also of interest for investigations at radioactive ion beam facilities. An extended library of theoretical cross sections and reaction rates is presented. The problem of alpha+nucleus potentials is addressed and new parametrizations presented. The problem of properly predicting cross sections at low level densities is illustrated by the 62Ni(n,gamma) reaction.Comment: 7 pages, invited talk, to appear in proceedings of CGS11 (Prague), World Scientific (new version: fixed typo in potential parameters; note: they will still be incorrect in the printed version

Multiple origins for the DLA at zabs=0.313z_\mathrm{abs}=0.313 toward PKS 1127−-145 indicated by a complex dust depletion pattern of Ca, Ti, and Mn

We investigate the dust depletion properties of optically thick gas in and around galaxies and its origin we study in detail the dust depletion patterns of Ti, Mn, and Ca in the multi-component damped Lyman-$\alpha$ (DLA) absorber at $z_\mathrm{abs}=0.313$ toward the quasar PKS 1127$-$145.} We performed a detailed spectral analysis of the absorption profiles of CaII, MnII, TiII, and NaI associated with the DLA toward PKS 1127$-$145, based on optical high-resolution data obtained with the UVES instrument at the Very Large Telescope (VLT). We obtained column densities and Doppler-parameters for the ions listed above and determine their gas-phase abundances, from which we conclude on their dust depletion properties. We compared the Ca and Ti depletion properties of this DLA with that of other DLAs. One of the six analyzed absorption components shows a striking underabundance of Ti and Mn in the gas-phase, indicating the effect of dust depletion for these elements and a locally enhanced dust-to-gas ratio. In this DLA and in other similar absorbers, the MnII abundance follows that of TiII very closely, implying that both ions are equally sensitive to the dust depletion effects. Our analysis indicates that the DLA toward PKS 1127$-$145 has multiple origins. With its narrow line width and its strong dust depletion, component 3 points toward the presence of a neutral gas disk from a faint LSB galaxy in front of PKS 1127$-$145, while the other, more diffuse and dust-poor, absorption components possibly are related to tidal gas features from the interaction between the various, optically confirmed galaxy-group members. In general, the Mn/CaII ratio in sub-DLAs and DLAs possibly serves as an important indicator to discriminate between dust-rich and dust-poor in neutral gas in and around galaxies.Comment: 10 pages, 8 figures, accepted for A&

Espejos hiperrealistas: los testimonios al óleo del historiador Exequiel Martínez

Este artículo examina los usos y sentidos de los cuadros pintados por el capitán de reserva y retirado Exequiel Martínez, sobre la guerra aérea en el conflicto anglo-argentino por las Malvinas e Islas del Atlántico Sur (1982). Dichos cuadros, definidos como "hiperrealistas" por su autor, desempeñan varias funciones en la vida cotidiana y ceremonial de la Fuerza Aérea, y también de sus protagonistas fuera de los ámbitos institucionales y en el circuito público del mercado de las láminas. Por eso las pinturas de Martínez ayudan a definir y a establecer una bella e informada memoria de la actuación de los pilotos de la Fuerza Aérea en el Atlántico Sur.Fil: Guber, Rosana. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Pque. Centenario. Centro de Investigaciones Sociales. Instituto de Desarrollo Economico y Social. Centro de Investigaciones Sociales; Argentin

Los comienzos en los confines: la no-opción por la antropología social de Leopoldo J. Bartolomé y Carlos A. Herrán

Sección 1. Leopoldo: inicios y formación de un creador de instituciones. Buena parte de la literatura histórica argentina identifica a la antropología social con una disciplina orientada por el compromiso social, el estudio de la modernidad y las problemáticas del mundo contemporáneo. En esa literatura participaron sus mismos cultores, es decir, los antropólogos que formaron parte de y que historizaron a la subdisciplina. Sin embargo, son pocos los trabajos que se detienen a interrogar estas premisas. Revisar las trayectorias formativas y profesionales de Leopoldo Bartolomé y Carlos Herrán nos ayuda a mostrar aspectos desconocidos aún de nuestra disciplina, señalando cómo la “antropología social” se articuló con otras ramas preexistentes, a través de sus materias, sus cultores y sus campos empíricos. También nos ayudan a relativizar las denominaciones y a prestar más atención a las preguntas y los enfoques de la investigación

Utility of Routine Versus Selective Upper Gastrointestinal Series to Detect Anastomotic Leaks After Laparoscopic Gastric Bypass

Background: In up to 4% of laparoscopic Roux-en-Y gastric bypass (LRYGB) procedures, anastomotic leaks occur. Early detection of gastrointestinal leakage is important for successful treatment. Consequently, many centers advocate routine postoperative upper gastrointestinal (UGI) series. The aim of this study was to determine the utility of this practice after LRYGB. Methods: Eight hundred four consecutive patients undergoing LRYGB from June 2000 to April 2010 were analyzed prospectively. The first 382 patients received routine UGI series between the third and fifth postoperative days (group A). Thereafter, the test was only performed when clinical findings (tachycardia, fever, and drainage content) were suspicious for a leak of the gastrointestinal anastomosis (group B; n = 422). Results: Overall, nine of 804 (1.1%) patients suffered from leaks at the gastroenterostomy. In group A, four of 382 (1%) patients had a leak, but only two were detected by the routine UGI series. This corresponds to a sensitivity of 50%. In group B, the sensitivity was higher with 80%. Specificities were comparable with 97% and 91%, respectively. Routine UGI series cost only 1.6% of the overall costs of a non-complicated gastric bypass procedure. With this leak rate and sensitivity, US $86,800 would have to be spent on 200 routine UGI series to find one leak which is not justified. Conclusions: This study shows that routine UGI series have a low sensitivity for the detection of anastomotic leaks after LRYGB. In most cases, the diagnosis is initiated by clinical findings. Therefore, routine upper gastrointestinal series are of limited value for the diagnosis of a lea

Reproducibility of straylight measurement by C-Quant for assessment of retinal straylight using the compensation comparison method

Background: Straylight gives the appearance of a veil of light thrown over a person's retinal image when there is a strong light source present. We examined the reproducibility of the measurements by C-Quant, and assessed its correlation to characteristics of the eye and subjects' age. Participants and Methods: Five repeated straylight measurements were taken using the dominant eye of 45 healthy subjects (age 21-59) with a BCVA of 20/20: 14 emmetropic, 16 myopic, eight hyperopic and seven with astigmatism. We assessed the extent of reproducibility of straylight measures using the intraclass correlation coefficient. Results: The mean straylight value of all measurements was 1.01 (SD 0.23, median 0.97, interquartile range 0.85-1.1). Per 10years of age, straylight increased in average by 0.10 (95%CI 0.04 to 0.16, p < 0.01]. We found no independent association of refraction (range −5.25 dpt to +2 dpt) on straylight values (0.001; 95%CI −0.022 to 0.024, p = 0.92). Compared to emmetropic subjects, myopia reduced straylight (−.011; −0.024 to 0.02, p = 0.11), whereas higher straylight values (0.09; −0.01 to 0.20, p = 0.09) were observed in subjects with blue irises as compared to dark-colored irises when correcting for age. The intraclass correlation coefficient (ICC) of repeated measurements was 0.83 (95%CI 0.76 to 0.90). Conclusions: Our study showed that straylight measurements with the C-Quant had a high reproducibility, i.e. a lack of large intra-observer variability, making it appropriate to be applied in long-term follow-up studies assessing the long-term effect of surgical procedures on the quality of visio