345 research outputs found

    Satellite triangulation in Europe from WEST and ISAGEX data

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    Observational data that was acquired during the West European Satellite Triangulation (WEST) program and the International Satellite Geodesy Experiment (ISAGEX) campaign was obtained for the purpose of performing a geometric solution to improve the present values of coordinates of the European stations in the OSU WN14 solutions, adding some new stations and assessing the quality of the WN14 solution with the help of the additional data available. The status of the data as received, the preprocessing required and the preliminary tests carried out for the initial screening of the data are described. The adjustment computations carried out and the results of the adjustments are discussed

    Analysis of MAGSAT data of the Indian region

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    Data tapes were decoded and 24 tracks over the Indian region were reduced to common elevation. Profiles of raw scalar and vector field data and the residuals along few passes were prepared. An anomaly data set was created from the Investigator-B tape. Data was sampled on an 0.5 deg by 0.5 deg grid

    Exploring the Central India Art of the Gond People: contemporary materials and cultural significance

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    This is the full paper of the short paper accepted for the iV2016 - 20th International Conference, Information Visualisation on 19 - 22 July 2016 at Universidade NOVA de Lisboa, in Lisbon, Portugal.Prior to the Muslim invasions of the 14th century, the Gond people were a culturally significant tribe in central India. Today, their art and culture is being rediscovered by a local and international audience. This is due mainly to the events of exhibitions by the Gond artist Jangarh Singh Shyam's work in Paris and Japan, in 1988. Since then, other Gond artists have also had their work exhibited internationally. Despite this renewed interest in Gond art, little has been written about their work. While much is known about the people and their customs, little is known about their artworks and what motivates their style of art and the depiction of particular elements in their works. This paper begins to address this apparent gap in the literature by reviewing a recent contemporary art exhibition of Gond art at the Art Gallery of South Australia

    A generalized approach for computation of near field radiation pattern of an antenna

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    A generalized procedure in the form of an analytical formulation for the determination of radiation pattern of an antenna at any arbitrary distance which covers the near field as well as far field is presented in this paper. With the prior knowledge of either the current or field distribution on the radiating aperture, the proposed near field analysis is generic and can be applied for wide variety of antenna elements. The underlying principle of the generalized procedure is tantamount to considering the radiating aperture as an array of point electric and magnetic dipoles. The validity and novelty of the proposed new approach have been substantiated considering an open ended circular cylindrical waveguide and a conical horn as case studies and treating the far field as a special case of near field with pertinent distance criterion. The effect of change in the distance of observation ranging from reactive near field to far field on the radiation patterns of these antennas has also been discussed. The simulation studies reveal that the depicted normalized phase patterns of both the circular waveguide and conical horn follow the changes in the profile of the corresponding amplitude patterns

    Analysis of MAGSAT data of the Indian region

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    Progress in the development of software for reading MAGSAT data tapes and for the reduction of anomaly data, and in the preparation of data for magnetic anomaly maps is reported

    Experiments for improved positioning by means of integrated Doppler satellite observations and the NNSS broadcast ephemeris

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    An effort to improve station position recovery using broadcast ephemeris in Doppler data reduction was studied. A comparison of precise and broadcast ephemerides, treating the former as the standard, yielded information about the state disturbance that can be associated with the broadcast ephemeris. Statistical information about the state disturbance was used with current observational data for improved position recovery. The rank deficiency problem encountered in the short arc geodetic adjustment procedure was analysed and it was deduced that the fundamental rank deficiency is six, scale information being derivable from the wavelength of transmission. Coordinate differences between stations coobserving a pass are estimable. The uncertainty of the broadcast ephemeris, now in the WGS72 system, was assessed. It was conservatively estimated that its positional uncertainty may vary between 19 to 26 m in-track, 15 to 20 m cross-track and 9 to 10 m in radial directions depending on the incidence of the epoch of observations in the interinjection period

    Sart-3 Functions to Regulate Germline Sex Determination in C Elegans

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    Caenorhabditis elegans gene sart-3 was first identified as the homolog of human SART3 ( S quamous cell carcinoma A ntigen R ecognized by T -cells 3). In humans, expression of SART3 is associated with squamous cell carcinoma, thus most of the studies focus on its potential role as a target of cancer immunotherapy (Shichijo et al. 1998; Yang et al. 1999). Furthermore, SART3 is also known as Tip110 (Liu et al. 2002; Whitmill et al. 2016) in the context of HIV virus host activation pathway. Despite these disease related studies, the molecular function of this protein was not revealed until the yeast homolog was identified as spliceosome U4/U6 snRNP recycling factor (Bell et al. 2002). The function of SART3 in development, however, remains unknown. Here we report that the C. elegans sart-3 mutant hermaphrodites exhibit a Mog ( M asculinization O f the G ermline) phenotype in adulthood suggesting that sart-3 normally functions to regulate the switch from spermatogenic to oogenic gametic sex
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