1,721,394 research outputs found
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No full textPK Singh, RK Pundir and DK Sadana (2015) Physical features and performance of unexplored Sanchori cattle population of Rajasthan state. Indian Journal of Animal Sciences 85 (8) : 923 - 926.Not AvailableNot Availabl
Wearable Dual-Band Quasi-Yagi Antenna for UHF-RFID and 2.4 GHz Applications
Get PDFA compact wearable dual-band quasi-Yagi RFID-reader antenna is designed for being incorporated into a smart glove. The antenna dual-band capability allows the integration of both the RFID reader at UHF band and a wireless data link at 2.4 GHz, into a single compact and wearable device. Dipole and loop antennas are combined into a quasi-Yagi structure to be placed on a hand back, in order to detect tagged objects close to the hand palm and fingers, during the operator normal activities. The dual-band driven element consists of a rectangular-shaped folded dipole (resonating at the ETSI UHF RFID band, 865-868 MHz) and a rhombus-shaped folded dipole (resonating at the WLAN band, 2400-2485 MHz). A few parasitic elements (reflector and directors) are included to focus the field in the required direction, namely out of the worker's hand. A prototype of the proposed textile antenna is developed on a stretchable fabric and its performance is measured in terms of read range and near-field distribution, at 868 MHz, and radiation pattern and gain at 2.45 GHz
A Compact and Wideband Dashboard Antenna for Vehicular LTE/5G Wireless Communications
Get PDFA wideband, low-profile, 3D automotive antenna for Long-Term Evolution (LTE) and 5G applications is presented in this paper. Different from other cellular antennas typically placed under the shark-fin cover or inside a car’s plastic spoiler, the proposed antenna is designed to be integrated inside the vehicle’s dashboard. The 35.5 × 40 × 45 mm3 antenna is compact, lightweight and robust. At the same time, this antenna is capable of operating from 670 up to 5000 MHz, covering the entire LTE/5G band (overall fractional bandwidth of 198%). A shunt stub was introduced between the monopole and ground plane to achieve a low LTE band and provide mechanical robustness for the proposed structure. Simulated performance in terms of reflection coefficient, radiation pattern and realized gain is described, showing a good agreement with the measurement results. Specifically, the antenna has a gain higher than −1 dBi at the low-frequency band (i.e., below 1 GHz) and higher than 3 dBi at the upper-frequency band (i.e., above 1.7 GHz). As per requirements, the ground plane size and layout can be properly chosen to fit the antenna into the available volume as well as to optimize the antenna’s performance
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Orf: an update on current research and future perspectives.
No full textOrf is one of the most widespread viral diseases around the world affecting mostly, small ruminants and sometimes, other species including wild animals. Of late, there have been an increasing number of reports of new species being affected by the disease, implying a dynamic host-pathogen interaction. The causative agent, orf virus, has been extensively investigated over recent years because of its zoonotic importance and growing host-range. The evasive mechanisms that the virus has developed to adapt and grow in the presence of an active immune response helps to explain the ability of the virus to repeatedly re-infect the same host.. Exposure of animals to stress or immunosupression as a result of therapy or primary viral infection can accentuate the severity of the disease. Genes homologous to host cytokines or their antagonists and that contribute to viral virulence have been found in the viral genome. A combination of electron microscopy, histology and polymerase chain reaction is the most accurate laboratory approach for confirmation of the disease although clinical signs are often typical. However, some infections may be confounded by similar clinical manifestations caused by other infections. The review presents, in brief, a recent understanding on the virus pathobiology, zoonotic significance, including novel approaches to disease management in field conditions
Performance Analysis of a Compact UHF RFID Ceramic Tag in High-Temperature Environments
Get PDFIn this paper an experimental analysis of the effect of high temperature on the performance of a compact UHF RFID tag is described and discussed. The tag is designed to be integrated into small cavities carved out of metal objects to identify themselves during the entire fabrication and assembly line. Since the UHF RFID tag is applied just after the die casting operations needed to model the metal component, it must be robust to high temperature manufacturing environments and processes. Tests demonstrated a significant chip input impedance variation by increasing the surrounding temperature, with a consequent read-range reduction. However, the considered ceramic tag can be detected at a satisfactory distance of 30 cm when employed with temperatures so high as up to 120 degrees C
Variations on the Author
Get PDF“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
Get PDFWe 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
Get PDFWe 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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