5,730 research outputs found

    Antenna simulator permits preinstallation system checkout

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    Antenna simulator provides for evaluation checkout of corporate feeds, monopulse sum-and-difference networks, etc., in a shielded environment prior to system checkout on an antenna pattern range. This technique is useful wherever simulation of monopulse antenna element characteristics is desired for checkout of ancillary equipment in a controlled environment

    Monopulse system with an electronic scanner

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    Electronic and mechanical scanning control system for monopulse tracking antenn

    The Analysis of Process in Selected Speeches of President Susilo Bambang Yudhoyono

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    One aim of this article is to show many kinds of speeches of process in speech. The example of speech is the speech of President Susilo Bambang Yudhoyono. The purpose of this journal is to find out types of processes, they are; material process, mental process, relational process, behavioral process, verbal process, and existential process. It was found that the types of processes in the five speeches of President Bambang Yudhoyono are 1387 verbs and classified the verb into 868 verbs as Material process (62.58%), 46 verbs as Mental process (3.31%), 130 verbs as Relational process (9.37%), 208 verbs as Behavioral process (15%), 25 verbs as Verbal process (1.80%), and 110 verbs as Existential process (7.94%). From the data, it could be known that the dominant process in the selected speech of President Susilo Bambang Yudhoyono was Material process

    Task oriented nonlinear control laws for telerobotic assembly operations

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    The goal of this research is to achieve very intelligent telerobotic controllers which are capable of receiving high-level commands from the human operator and implementing them in an adaptive manner in the object/task/manipulator workspace. Initiatives by the authors at Integrated Systems, Inc. to identify and develop the key technologies necessary to create such a flexible, highly programmable, telerobotic controller are presented. The focus of the discussion is on the modeling of insertion tasks in three dimensions and nonlinear implicit force feedback control laws which incorporate tool/workspace constraints. Preliminary experiments with dual arm beam assembly in 2-D are presented

    Interannual variability of gps heights and environmental parameters over europe and the mediterranean area

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    Vertical deformations of the Earth’s surface result from a host of geophysical and geological processes. Identification and assessment of the induced signals is key to addressing outstanding scientific questions, such as those related to the role played by the changing climate on height variations. This study, focused on the European and Mediterranean area, analyzed the GPS height time series of 114 well-distributed stations with the aim of identifying spatially coherent signals likely related to variations of environmental parameters, such as atmospheric surface pressure (SP) and terrestrial water storage (TWS). Linear trends and seasonality were removed from all the time series before applying the principal component analysis (PCA) to identify the main patterns of the space/time interannual variability. Coherent height variations on timescales of about 5 and 10 years were identified by the first and second mode, respectively. They were explained by invoking loading of the crust. Single-value decomposition (SVD) was used to study the coupled interannual space/time variability between the variable pairs GPS height–SP and GPS height–TWS. A decadal timescale was identified that related height and TWS variations. Features common to the height series and to those of a few climate indices—namely, the Arctic Oscillation (AO), the North Atlantic Oscillation (NAO), the East Atlantic (EA), and the multivariate El Niño Southern Oscillation (ENSO) index (MEI)—were also investigated. We found significant correlations only with the MEI. The first height PCA mode of variability, showing a nearly 5-year fluctuation, was anticorrelated (– 0.23) with MEI. The second mode, characterized by a decadal fluctuation, was well correlated (+0.58) with MEI; the spatial distribution of the correlation revealed, for Europe and the Mediterranean area, height decrease till 2015, followed by increase, while Scandinavian and Baltic countries showed the opposite behavior

    Socio-demographic determinants of access to climate change information among tomato growing farmers in Mvomero district, Tanzania

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    This study investigated tomato farmers’ access to climate information in Mvomero District in Tanzania. This study used mixed approach where both quantitative and qualitative methods were used. The study comprised of 60 farmers’ who were systematically randomly selected. Questionnaires, focus group discussions (FGDs), and in-depth interviews were the methods used in data collection. Quantitative data were analysed by using SPSS while content analysis was used for qualitative data. Key findings show that majority of farmers use radio as a source of climate change information. The study discovered that gender, marital status, age, level of education and income were the socio-demographic factors influencing access to climate change information. The study concludes that socio-demographic factors influence farmers’ adaptation to climate change. The study recommends the establishment of ICT climate change information systems that can provide timely, relevant, and reliable climate change information to farmers. The study also suggests the use of mobile phone technology to reach out a wider population of farmers

    Analysis of top cited papers in library and information science that have stood the test of time

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    Analysis of 10 top cited papers in the field of library and information science was carried out to understand their main characteristics and features such as bibliographic details, authorship collaboration, author affiliation, citation counts and specialty. This list of classic papers was extracted from Google Scholar Metrics in June 2018. These most cited articles were published in 2006 and the list was released in June 2017. The findings indicate that these 10 papers originated from 10 different institutions in six countries mostly in North America and Europe. The number of citations ranged from 410 to 3051, the mean number of authors per article is 2.3 and the mean number of citations per year was 98. Nine out of the 10 articles reported citation analyses. This suggests that LIS research has shifted towards exploring scientific publications and their impact through citation analysis, bibliometrics and scientometrics.Keywords: citation analysis, classic papers, library and information science, scientometrics, bibliometric
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