The Professional Discussions of Catalogers: A Content Analysis of AUTOCAT

This study reports on a content analysis conducted on AUTOCAT, an electronic mailing list dedicated to cataloging. The study was conducted to determine the trends and patterns that exist among the discussions occurring on AUTOCAT. This was done by analyzing the email messages posted on AUTOCAT according to topic, function, job title of message author, and institutional affiliation of message author. A systematic random sample of 567 messages was chosen from an estimated total of 10,300 messages posted to AUTOCAT during 2007. The findings of the study indicate that AUTOCAT is being used by cataloging professionals as a valuable resource for solving immediate cataloging questions, especially for message posters who are affiliated with academic libraries that are not members of the Association of Research Libraries (ARL). Also, the study suggests that message posters who are affiliated with ARL libraries tend to use AUTOCAT as a discussion forum for general cataloging standards and policies. Other cataloging topics that appear to be heavily discussed on AUTOCAT are professional concerns and technology issues

Особенности формирования сварного шва в изделиях из титанового сплава Ti-6Al-4V, полученных аддитивными методами

В данной работе проводился сравнительных анализ микроструктуры и микротвердости сварных соединений, полученных методом электроннолучевой сварки (ЭЛС). В качестве образцов исследовались пластины, полученные прокаткой и аддитивным методом EBF{3} (electronbeam freeform fabrication - электронно-лучевое изготовление свободной формы). Выявлено аналогичное формирование трех сварочных зон после ЭЛС в 3D-напечатанных образцах. Показано влияние исходной структуры на процесс формирования сварного соединения. Из результатов дюрометрического анализа следует, что зона плавления (FZ) характеризуется повышенной микротвердостью относительно основного материала. Однако в случае образцов, полученных методом EBF{3}, характер повышения отличается, что связано с особенностями формирования сварного шва.Comparing analysis of the microstructure and microhardness has been investigated in electron-beam welded Ti-6Al-4V alloy parts obtained by rolling and additive manufacturing. Electron-beam welding produced three distinct zones (FZ - the fusion zone, HAZ - the heat affected zone, BM - the base metal) in the welded material. The influence of the BM on the structure of welded joint is shown. According to the results of microhardness testing, it follows that in the FZ the microhardness is higher than in the BM. However, for samples obtained by EBF{3}, the nature of the increase is different due to the features of the formed microstructure during welding

High prevalence of missed information related on bone health in orthogeriatric patients with fragility fractures of the pelvis-an institutional register-based analysis

This is the first study that highlighted the amount of missed information related on bone health in orthogeriatric patients suffering fragility fractures of the pelvis and also evaluated its prevalence and differing etiology in the assessed patients, regarding osteoporosis and/or osteomalacia, based on laboratory and instrumental measurements. This evaluation should become a standardized procedure in the treatment of orthogeriatric patients presenting with a FFP. INTRODUCTION Fragility fractures of the pelvis (FFP) are common in orthogeriatric patients. Secondary fracture prevention regarding evaluation and treatment of an underlying osteoporosis or osteomalacia is still often neglected. The purpose of this study was to evaluate the amount of missed information related on bone health in older adult FFP patients, the prevalence of vitamin D deficiency in assessed patients, and if fracture type-dependent distribution patterns could be observed. METHODS A retrospective analysis of prospectively collected data of an institutional register was performed. Patients aged 80~years and older (n = 456) admitted with a FFP from 01/2003 until 12/2019 to a level I trauma center were included. RESULTS In 456 patients, FFP type II were leading (66.7%). Diagnostics were conducted in 37.1% of the patients regarding measurement of vitamin D levels and 21.7% regarding DXA measurements; vitamin D deficiency was observed in 62.7%, indicators for an underlying osteomalacia in 45.8%, and an osteoporosis in 46.5% of the assessed patients. CONCLUSION Although FFP are common and will increase, there is still a lack of secondary fracture prevention, starting with information related on bone health. In the assessed patients, a high prevalence of vitamin D deficiency was present, but no significant correlation between vitamin D level and type of fracture was observed. Ongoing education for varying etiology and specific treatment of these fractures is necessary, as surgical treatment was unified, but drug therapy remains different

High throughput optical readout of dense arrays of nanomechanical systems for sensing applications

N. F. Martínez et al...We present an instrument based on the scanning of a laser beam and the measurement of the reflected beam deflection that enables the readout of arrays of nanomechanical systems without limitation in the geometry of the sample, with high sensitivity and a spatial resolution of few micrometers. The measurement of nanoscale deformations on surfaces of cm2 is performed automatically, with minimal need of user intervention for optical alignment. To exploit the capability of the instrument for high throughput biological and chemical sensing, we have designed and fabricated a two-dimensional array of 128 cantilevers. As a proof of concept, we measure the nanometer-scale bending of the 128 cantilevers, previously coated with a thin gold layer, induced by the adsorption and self-assembly on the gold surface of several self-assembled monolayers. The instrument is able to provide the static and dynamic responses of cantilevers with subnanometer resolution and at a rate of up to ten cantilevers per second. The instrumentation and the fabricated chip enable applications for the analysis of complex biological systems and for artificial olfaction.The authors acknowledge financial support from the Spanish Science Ministry through Project Nos. TEC2009– 14517-C02, TRA2009–0117, and CSD2007–00010.Peer reviewe

Community structure of vascular epiphytes:A neutral perspective

Vascular epiphytes form a diverse group of almost 30 000 species, yet theory concerning their community structure is still largely lacking. We therefore employed the simplest models of biodiversity, (near-)neutral models, to generate hypotheses concerning their community structure. With recently developed tools for (near-)neutral models we analyzed species abundance data from many samples in Central and South America which we divided into four metacommunities (Mesoamerica, Central America, Amazonia and Paraná), where for each metacommunity we considered two subsets differing in dispersal syndrome: an animal-dispersed guild and a wind-dispersed guild. We considered three models differing in the underlying speciation mode. Across all metacommunities, we found observed patterns to be indistinguishable from patterns generated by neutral or near-neutral processes. Furthermore, we found that subdivision in different dispersal guilds was often supported, with recruitment limitation being stronger for animal-dispersed species than for wind-dispersed species. This is the first time that (near-)neutral theory has been applied to epiphyte communities. Future efforts with additional data sets and more refined models are expected to further improve our understanding of community structure in epiphytes and will have to test the generality of our findings

Measurement of gamma p --> K+ Lambda and gamma p --> K+ Sigma0 at photon energies up to 2.6 GeV

The reactions gamma p --> K+ Lambda and gamma p --> K+ Sigma0 were measured in the energy range from threshold up to a photon energy of 2.6 GeV. The data were taken with the SAPHIR detector at the electron stretcher facility, ELSA. Results on cross sections and hyperon polarizations are presented as a function of kaon production angle and photon energy. The total cross section for Lambda production rises steeply with energy close to threshold, whereas the Sigma0 cross section rises slowly to a maximum at about E_gamma = 1.45 GeV. Cross sections together with their angular decompositions into Legendre polynomials suggest contributions from resonance production for both reactions. In general, the induced polarization of Lambda has negative values in the kaon forward direction and positive values in the backward direction. The magnitude varies with energy. The polarization of Sigma0 follows a similar angular and energy dependence as that of Lambda, but with opposite sign.Comment: 21 pages, 25 figures, submitted to Eur. Phys. J.

Конверсия попутных нефтяных газов С3-С4 в жидкие углеводороды на модифицированных цеолитных катализаторах

Исследованы влияние модифицирования цеолита типа MFI и активированные плазмой, на кислотные и каталитические свойства в конверсии пропан-бутановой фракции в арены.The effect of modification of MFI zeolite activated by plasma on acid and catalytic properties in the conversion of the propane-butane fraction into arenes was investigated

Evidence for the positive-strangeness pentaquark Θ+\Theta^+ in photoproduction with the SAPHIR detector at ELSA

The positive--strangeness baryon resonance $\Theta^+$ is observed in photoproduction of the $\rm nK^+K^0_s$ final state with the SAPHIR detector at the Bonn ELectron Stretcher Accelerator ELSA. It is seen as a peak in the $\rm nK^+$ invariant mass distribution with a $4.8\sigma$ confidence level. We find a mass $\rm M_{\Theta^+} = 1540\pm 4\pm 2$ MeV and an upper limit of the width $\rm \Gamma_{\Theta^+} < 25$ MeV at 90% c.l. From the absence of a signal in the $\rm pK^+$ invariant mass distribution in $\rm\gamma p\to pK^+K^-$ at the expected strength we conclude that the $\Theta^+$ must be isoscalar.Comment: 9 pages, 4 figure

K0-Sigma+ Photoproduction with SAPHIR

Preliminary results of the analysis of the reaction p(gamma,K0)Sigma+ are presented. We show the first measurement of the differential cross section and much improved data for the total cross section than previous data. The data are compared with model predictions from different isobar and quark models that give a good description of p(gamma,K+)Lambda and p(gamma,K+)Sigma0 data in the same energy range. Results of ChPT describe the data adequately at threshold while isobar models that include hadronic form factors reproduce the data at intermediate energies.Comment: 4 pages, Latex2e, 4 postscript figures. Talk given at the International Conference on Hypernuclear and Strange Particle Physics (HYP97), Brookhaven National Laboratory, USA, October 13-18, 1997. To be published in Nucl. Phys. A. Revised version due to changes in experimental dat