1,720,961 research outputs found
Uzaktan kontrollü ikincil emisyon iyonizasyon kalorimetri modülleri ile yüksek enerjili kozmik ve gama radyasyon ölçümü
Full text linkThe demand for precise, robust, and reliable radiation-resistant particle detectors and ionization calorimeters intensifies, due to the escalating luminosity and unprecedented radiation conditions at particle colliders and accelerators. Secondary Emission (SE) Ionization Calorimetry is a novel technology designed to measure the energy of electromagnetic and hadronic particles, particularly in extreme radiation conditions. In this study, we have tested and investigated the development and radiation test of the novel SE modules. The modules were developed by modifying the conventional Hamamatsu single anode R7761 Photomultiplier Tubes. Three different voltage conditions for the same module were developed and the new modules were tested by using cosmic, gamma (Co-60) and neutron (AmBe) radiation sources. The results show that all three modes have good sensitivity to electromagnetic showers, and they are suitable for harsh radiation environments. This study also shows that SE module is a promising technology shedding light on future radiation-resistant nuclear and high-energy detectors. Here, we discuss the technical design, test characteristics and cosmic and particle interaction results of the newly developed SE modules. Since such detector systems are either in a high radiation area or in a closed room/box, remote mode changes allow us to continue the experimental process without interruption. By adding these signals to the interface where the modes are controlled, we can instantaneously observe the modes' effects.Parçacık çarpıştırıcıları ve hızlandırıcılarında artan parlaklık ve çok yüksek radyasyon koşulları nedeniyle hassas, sağlam ve güvenilir radyasyona dayanıklı parçacık dedektörleri ve iyonizasyon kalorimetrelerine olan talep artmaktadır. İkincil Emisyon (SE) İyonizasyon Kalorimetrisi, özellikle aşırı radyasyon koşullarında elektromanyetik ve hadronik parçacıkların enerjisini ölçmek için tasarlanmış yeni bir teknolojidir. Bu çalışmada, yeni SE modüllerinin geliştirilmesini ve radyasyon ölçümü test ettik ve araştırdık. Modüller, geleneksel Hamamatsu tek anotlu R7761 Foto çoğaltıcı Tüpleri modifiye edilerek geliştirilmiştir. Aynı modül için üç farklı voltaj modu geliştirilmiş ve yeni modüller kozmik, gama (Co-60) ve nötron (AmBe) radyasyon kaynakları kullanılarak test edilmiştir. Sonuçlar, her üç modun da elektromanyetik akıya karşı iyi bir duyarlılığa sahip olduğunu ve zorlu radyasyon ortamları için uygun olduklarını göstermektedir. Bu çalışma aynı zamanda SE modülünün gelecekteki radyasyona dayanıklı nükleer ve yüksek enerjili dedektörlere ışık tutan umut verici bir teknoloji olduğunu göstermektedir. Burada, yeni geliştirilen SE modüllerinin teknik tasarımı, test özellikleri ve kozmik ve parçacık etkileşim sonuçları tartışılmaktadır. Bu tür dedektör sistemleri ya yüksek radyasyonlu bir alanda ya da kapalı bir oda/kutu içerisinde olduğu için uzaktan kontrol ile mod değişimleri deneysel süreci kesintiye uğratmadan devam ettirmemizi sağlar. Bu sinyalleri modların kontrol edildiği arayüze ekleyerek modların etkilerini anlık olarak gözlemleyebiliriz
Nonequilibrium phase diagrams in a multilayer Ising ferrimagnet system: The Glauber type stochastic dynamics approach
No full textMultilayer Ising ferrimagnet system is studied with nonequilibrium phase diagrams employing the Glauber stochastic dynamics approach. Firstly, nonequilibrium phase transition temperatures and their phase transition nature are investigated in detail. The study shows that the system displays both the second and first-phase transition behaviors. Then, it is determined that the essential phases of nonequilibrium phase diagrams consist of five phases (i1, i2, nm1, nm2, p), four mixed phases (i1+ p, nm1 +nm2, nm2 + p, i1 + nm2), and four special points (A, B, E, TP). Lastly, the study demonstrates that the dynamic magnetic characteristics of the system exhibit a significant dependence on the parameters of the Hamiltonian
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Exploring Nonequilibrium Hysteresis in Sr2FeMoO6 Double Perovskites through Glauber Dynamics
No full textHerein, nonequilibrium hysteresis properties of the double perovskite (DP) Sr2FeMoO6 are investigated using mean field theory and the Glauber dynamics approach within the Ising model framework. The phase region of the system is determined by analyzing the time-varying average (Formula presented.) and (Formula presented.) magnetizations. The dynamic Fe and Mo magnetizations are calculated depending on the temperature to get the dynamic transition points for different ratio of the system parameters. The effects of temperature and single-ion anisotropy on dynamic hysteresis behaviors are examined in depth. Some recognizable characteristics are discovered, such as the occurrence of a triple hysteresis loop for appropriate crystal field and temperature values. The Sr2FeMoO6 system exhibits hysteresis behavior similar to DPs such as A2FeMoO6, Sr2VMoO6, and Sr2CrWO6
Variations on the Author
Full text link“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
Full text linkWe 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
Full text linkWe 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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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