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Your search keyword '"Kostelecky, J."' showing total 17 results
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17 results on '"Kostelecky, J."'

4. Final report of EURAMET.M.G-K3: regional comparison of absolute gravimeters

Author

Coskun, I., Falk, R., Palinkas, V., Wziontek, H., Rulke, A., Val'Ko, M., Ullrich, C., Butta, H., Kostelecky, J., Bilker-Koivula, M., Naranen, J., Prato, A., Mazzoleni, F., Kirbas, C., Coskun, Van Camp, M., Castelein, S., Bernard, J. D., Lothhammer, A., Schilling, M., Timmen, L., Iacovone, D., Nettis, G., Greco, F., Messina, A. A., Reudink, R., Petrini, M., Dykowski, P., Sekowski, M., Janak, J., Papco, J., Engfeldt, A., and Steffen, H.

Subjects
010309 optics, Gravimeter, Data harmonization, 0103 physical sciences, General Engineering, Constrained least squares, Geodetic datum, 010306 general physics, Geodesy, Mutual recognition, 01 natural sciences, Equivalence (measure theory), Mathematics
Abstract

The regional key comparison of absolute gravimeters, EURAMET.M.G-K3 and the simultaneously organized additional comparison, was held in Germany at the Geodetic Observatory Wettzell of the German Federal Agency for Cartography and Geodesy in the spring of 2018. Here we present the list of the participants who actually performed measurements during the comparison, the data submitted by the operators as well as the results of the determination of the gravity as a function of height at the comparison sites. The measurement strategy is briefly discussed and the results of the data harmonization is documented. Finally, the results of the constrained least squares adjustment are presented including the degrees of equivalence of each gravimeter and the key comparison reference values. Main text To reach the main text of this paper, click on Final Report. Note that this text is that which appears in Appendix B of the BIPM key comparison database kcdb.bipm.org/. The final report has been peer-reviewed and approved for publication by the CCM, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).

Published
2020

6. International GPS Service : 2001-2002 technical reports

Author

Feltens, J, Ray, J, Tregoning, P, Simek, J, Kostelecky, J, Woppelmann, G, Khoda, O, Garcia, C, Wonnakott, R, Schone, T, Slater, J, Boomkamp, H, Gendt, G, Sherwood, R, Beavan, J, Stowers, D, Moore, A, Combrinck, L, Habrich, H, Bock, Y, Gaulue, E, Noll, C, Drewes, H, Seemueller, W, Yamagiwa, A, Luton, G, Bruyninx, C, Hering, T, Nurutdinov, K, Rohde, J, Fang, P, Tetreault, P, Kass, W, Heflin, M, Dow, J. M, Hugentobler, U, Altamimi, Z, Ferland, R, Weber, R, Neilan, R, and Reigber, C

Abstract

Applications of the Global Positioning System (GPS) to Earth Science are numerous. The International GPS Service (IGS), a federation of government agencies and universities, plays an increasingly critical role in support of GPS-related research and engineering activities. Contributions from the IGS Governing Board and Central Bureau, analysis and data centers, station operators, and others constitute the 2001 / 2002 Technical Reports.

Published
2004

8. Results of the Seventh International Comparison of Absolute Gravimeters ICAG-2005 at the Bureau International des Poids et Mesures, Sèvres.

Author

Vitushkin, L., Jiang, Z., Robertsson, L., Becker, M., Francis, O., Germak, A., D΄Agostino, G., Palinkas, V., Amalvict, M., Bayer, R., Bilker-Koivula, M., Desogus, S., Faller, J., Falk, R., Hinderer, J., Gagnon, C., Jakob, T., Kalish, E., Kostelecky, J., and Lee, Chiungwu

Abstract

The International Comparison of Absolute Gravimeters ICAG-2005 was held at the Bureau International des Poids et Mesures (BIPM), Sèvres, France in September 2005. The organization of ICAG-2005, measurement strategy, calculation and presentation of the results were described in a technical protocol pre-developed to the comparison. Nineteen absolute gravimeters carried out 96 series of measurements of free-fall acceleration g at the sites of the BIPM gravity network. The vertical gravity gradients were measured by relative gravimeters. For the first time the budgets of uncertainties were presented. The g-values for the sites A and B of the BIPM gravity network at a height of 0.90 m are (980,925,702.2 ± 0.7) μGal and (980,928,018.5 ± 0.7) μGal, respectively. This result is in a good agreement with that obtained in ICAG-2001. [ABSTRACT FROM AUTHOR]

Published
2010
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9. Results of the European Comparison of Absolute Gravimeters in Walferdange (Luxembourg) of November 2007.

Author

Francis, O., van Dam, T., Germak, A., Amalvict, M., Bayer, R., Bilker-Koivula, M., Calvo, M., D΄Agostino, G.-C., Dell΄Acqua, T., Engfeldt, A., Faccia, R., Falk, R., Gitlein, O., Fernandez, M., Gjevestad, J., Hinderer, J., Jones, D., Kostelecky, J., Le Moigne, N., and Luck, B.

Abstract

The second international comparison of absolute gravimeters was held in Walferdange, Grand Duchy of Luxembourg, in November 2007, in which twenty absolute gravimeters took part. A short description of the data processing and adjustments will be presented here and will be followed by the presentation of the results. Two different methods were applied to estimate the relative offsets between the gravimeters. We show that the results are equivalent as the uncertainties of both adjustments overlap. The absolute gravity meters agree with one another with a standard deviation of 2 μgal (1 gal = 1 cm/s2). [ABSTRACT FROM AUTHOR]

Published
2010
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17. Planarians in toxicology. I. Physiology of sexual-only Dugesia dorotocephala: effects of diet and population density on adult weight and cocoon production.

Author

Kostelecky J, Elliott B, and Schaeffer DJ

Subjects
Animals, Body Weight physiology, Data Interpretation, Statistical, Diet, Planarians growth & development, Population Density, Reproduction physiology, Planarians physiology, Turbellaria physiology
Abstract

A rare sexual-only race of Dugesia dorotocephala produces offspring from cocoons rather than by fissioning, allowing individuals to be accurately aged. Because each animal possesses fully developed male and female reproductive systems and a true brain with synapses, many types of toxicological studies which normally use vertebrates are possible with these animals. Prior to using this race for toxicological studies, a 3(3) factorial study was carried out to determine the effects of environmental conditions on reproduction and growth. The factors studied were crowding (2, 4, or 8 animals/50 ml medium), age (17, 19, 21 months), and type of dietary protein (soy, liver, cooked egg yolk). Protein composition dramatically affected the numbers of cocoons deposited per planarian, mean weight, and temporal patterns of weight changes. During 65 days of observation, planarians fed liver deposited an average of 3.28 cocoons/planarian while those fed soya or egg yolk deposited an average of 0.24 cocoon/planarian. Crowding, but not age, affected the numbers of cocoons deposited. Statistical analysis showed that protein composition, age, and crowding, alone and in factorial combinations, affected both the absolute weight changes and the temporal patterns in weight changes in each group.

Published
1989
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