506 research outputs found
D-1603: 504 South Main, Logan, Utah, Paul R. and Eva G. Merrill/Rudolph and Alice Speth residence. Lot 5 Block 1 Plat D
No full textD-1603: 504 South Main, Logan, Utah, Paul R. and Eva G. Merrill/Rudolph and Alice Speth residence. Lot 5 Block 1 Plat
NAP to EVRS: a re-evaluation of the Dutch input and its impact on the realization of the European Vertical Reference System
No full textDouble degree of Master of Science in Applied Geophysics at Delft University of Technology, ETH Zürich and RWTH Aachen University. - In 2004, Rijkswaterstaat provided geopotential differences between the benchmarks of the Normaal Amsterdams Peil (NAP) network to the Bundesamt für Kartographie und Geodäsie (BKG) for the realization of the European Vertical Reference System (EVRS). This data was found to be incorrect, resulting in inaccurate transformations between EVRF2007 and the national height systems of the participating countries. To correct the realization of the EVRS and obtain accurate transformations between the height systems, it is essential that the BKG is provided with correct geopotential information on the NAP network. In this thesis, a computational procedure has been developed to obtain correct geopotential differences. The final procedure was implemented in a MATLAB software package that was provided to Rijkswaterstaat for future computations. The old results were compared with the newly computed results, in order to obtain insight into the origin of the errors made in 2004. The impact of these errors on realizations of the EVRS was examined as well. Finally, the connection of the NAP levelling network to the neighbouring countries, and thus the Unified European Levelling Network, (UELN) was investigated. Due to the available data, most steps in the computational procedure were already predefined. Therefore, the main development was a method for predicting gravity at the levelling benchmarks. Observed gravity was reduced to surface gravity anomalies to remove height dependency. This makes accurate 2-D interpolation possible. Four methods were tested for the interpolation of these gravity anomalies: ordinary Kriging, least-squares collocation, cubic spline and biharmonic spline. Biharmonic spline interpolation was selected as the gravity prediction method for the final procedure. For potentially further improvement of the gravity prediction, two gravity corrections were investigated as well: residual terrain modelling and correcting for a global gravity field model. Both corrections were found to cause negligible improvement to the gravity prediction with respect to the uncertainty of the levelling observations. Therefore, these corrections were not used in the final procedure. Large regional differences were observed between the newly obtained results and those of Rijkswaterstaat. These differences could predominantly be explained by a mistake in sign convention of the surface gravity anomalies when restoring the observed gravity. In an updated realization of the EVRS, using the new NAP geopotential information, a tilt of several millimetres within the Netherlands and Belgium is observed. When updated data from other countries are also considered, datum points heights varied in the centimetre range. Finally, there are a total of 28 Dutch-German cross-border observations at 13 locations, evenly distributed along the border. This lead to the conclusion that the connection between the NAP and the German levelling network is strong. The connection of the NAP with the Belgian network is much weaker, with only a single observation currently known at the BKG. Although, from the data used here it seems that more connections should be readily available.Civil Engineering and GeosciencesGeoscience and Remote SensingApplied Geophysics and Civil Engineerin
PALSAR InSAR Processing, Subsidence of agricultural highland regions in Yemen
No full textThe use of Interferometric Synthetic Aperture Radar (InSAR) to monitor ground subsidence and the general principles behind InSAR were studied and summarized. The obtained knowledge was used to process the Phased Array type L-band Synthetic Aperture Radar (PALSAR) data of the region between Sana’a and Dhamar, Yemen, from raw data to interferograms. During this processing unwrapping proved to be a difficult procedure creating phase jumps. This problem can increased in size when using wrong mask. After unwrapping in the best possible way and filtering the result, three basins turned out to subside with high rates. The biggest basin at an average maximum rate of 32 cm?yr and the smaller basin with an average maximum rate of 53 cm?yr. This subsidence is not linear during the year, in the summer subsidence is faster than during the winter.Applied Earth ScienceGeoscience & EngineeringCivil Engineering and Geoscience
Farmers, Hunters, and Colonists
No full textEight contributors discuss early trade relations between Plains and Pueblo farmers, the evolution of interdependence between Plains hunter-gatherers and Pueblo farmers between 1450 and 1700, and the later comanchero trade between Hispanic New Mexicans and the Plains Comanche. Contributors: Timothy G. Baugh Judith A. Habicht-Mauche Frances Levine Christopher Lintz David H. Snow John D. Speth Katherine A. Spielmann David R. Wilco
HIV-1 and its transmembrane protein gp41 bind to different Candida species modulating adhesion
No full textDiffractive production of vector mesons in Deep Inelastic Scattering within k<sub>t</sub>-factorization approach
No full textIn this work we give a theoretical description of the elastic vector meson production in diffractive DIS developed within the kt-factorization formalism. Since the kt-factorization scheme does not require large values of Q2+mV2, we conduct an analysis that is applicable to all values of Q2 from photo- up to highly virtual production of vector mesons. The basic quantity in this approach - the unintegrated gluon structure function - was for the first time extracted from the experimental data on F2p, thoroughly investigated, and consistently used in the vector meson production calculation. Moreover, by limiting ourselves to the lowest Fock state of the vector meson, we were able to construct in a closed form the theory of spin-angular coupling in the vector meson. This allowed us for the first time to address the production of a vector meson in a given spin-angular state. We performed an extensive analytical and numerical investigation of the properties of 1S, 2S, and D-wave vector meson production reactions. Treating the physical ground state vector mesons as purely 1S states, we observed a good overall agreement with all available experimental data on vector meson production. For the excited states, our analysis predicts a picture which is remarkably different from 1S-state, so that such reactions can be regarded as potential sources of new information on the structure of excited states in vector mesons
Reduction of myocardial infarction by postischemic administration of the calpain inhibitor A-705253 in comparison to the Na(+)/H(+) exchange inhibitor Cariporide (R) in isolated perfused rabbit hearts
No full textThe calpain inhibitor A-705253 and the Na(+)/H(+) exchange inhibitor Cariporide (R) were studied in isolated perfused rabbit hearts subjected to 60 min occlusion of the ramus interventricularis of the left coronary artery (below the origin of the first diagonal branch), followed by 120 min of reperfusion. The inhibitors were added to the perfusion fluid solely or in combination at the beginning of reperfusion. Hemodynamic monitoring and biochemical analysis of perfusion fluid from the coronary outflow were performed. Myocardial infarct size and area at risk (transiently not perfused myocardium) were determined from left ventricular slices after a special staining procedure with Evans blue and 2,3,5-triphenyltetrazolium chloride. The infarcted area (dead myocardium) was 72.7 +/- 4.0% of the area at risk in untreated controls, but was significantly smaller in the presence of the inhibitors. The largest effect was observed with 10(-6) M A-705253, which reduced the infarcted area to 49.2 +/- 4.1% of the area at risk, corresponding to a reduction of 33.6%. Cariporide (R) at 10(-6) M reduced the infarct size to the same extent. The combination of both inhibitors, however, did not further improve cardioprotection. No significant difference was observed between the experimental groups in coronary perfusion, left ventricular pressure, heart rate, or in the release of lactate dehydrogenase and creatine kinase from heart muscle
Cooperation through Information Interchange in StormCast
No full textrtificial intelligence/expert systems in the warning and forecast operations of the National Weather Service. Proceedings of Expert Systems in Government Symposium (McLean, VA, USA, 22-24 Oct. 1986). IEEE Comput. Soc. Press, Washington, DC, USA. pp. 578586. Renesse, R. van, H. van Staveren, J. Hall, M. Turnbull, B. Jansen, J. Jansen, S. Mullender, D. Holden, A. Bastable, T. Fallmyr, D. Johansen, Sj. Mullender, and W. Zimmer (1988). MANDIS/Amoeba: A widely dispersed objectoriented operating system. In R. Speth (Ed.), Research into Networks and Distributed Applications. Elsevier, Amsterdam. pp. 823-831. Sacerdoti, E. (1974). Planning in a hierarchy of abstraction spaces. Artificial Intelligence, 5, 115-135. Sacerdoti, E. (1977). A structure for plans and behavior. Elsevier, North-Holland, New York. Sarin, S.K., and N.A. Lynch (1987). Discarding obsolete information in a replicated database system. IEEE Transactions on Software Engineering, SE-13 (1), 39-47. Smith, R.G. (1980). The cont
Impact of the Volkswagen emissions control defeat device on US public health
No full textThe US Environmental Protection Agency (EPA) has alleged that Volkswagen Group of America (VW) violated the Clean Air Act (CAA) by developing and installing emissions control system 'defeat devices' (software) in model year 2009–2015 vehicles with 2.0 litre diesel engines. VW has admitted the inclusion of defeat devices. On-road emissions testing suggests that in-use NO[subscript x] emissions for these vehicles are a factor of 10 to 40 above the EPA standard. In this paper we quantify the human health impacts and associated costs of the excess emissions. We propagate uncertainties throughout the analysis. A distribution function for excess emissions is estimated based on available in-use NO[subscript x] emissions measurements. We then use vehicle sales data and the STEP vehicle fleet model to estimate vehicle distance traveled per year for the fleet. The excess NO[subscript x] emissions are allocated on a 50 km grid using an EPA estimate of the light duty diesel vehicle NO[subscript x] emissions distribution. We apply a GEOS-Chem adjoint-based rapid air pollution exposure model to produce estimates of particulate matter and ozone exposure due to the spatially resolved excess NO[subscript x] emissions. A set of concentration-response functions is applied to estimate mortality and morbidity outcomes. Integrated over the sales period (2008–2015) we estimate that the excess emissions will cause 59 (95% CI: 10 to 150) early deaths in the US. When monetizing premature mortality using EPA-recommended data, we find a social cost of ~840m in social costs compared to a counterfactual case without recall
Perspektiven des freiwilligen Engagements und der Engagement-forschung in den Niederlanden
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