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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
81

Migrace na Angular 6 v projektu InfiSpector

Veškrna, Tomáš January 2019 (has links)
The primary goal of this diploma thesis is to migrate project InfiSpector to anewer version of Angular framework. In the begining is described project InfiSpec-tor itself followed by an analysis of Angular framework, Druid database, streamingplatform Kafka and Test Driven Development process. Metodology chapter presentsan outline of theoretical plan for a practical part. The practical part describes theprocess of project InfiSpector migration and presents solutions for obstacles met onthe way. The conclusion summarizes thesis results.
82

Cosmology and galactic angular momenta

Hays, Marmion Michael Richard 01 January 1961 (has links)
The plan of this paper is to present some observations and then in subsequent chapters to examine the two basic cosmological ideas in the light of these observations. The first of the observations involves an estimate of the angular momentum in a given volume of space and the ratio of this momentum to the mass or number of nucleons in the given volume. We therefore wish to obtain a rough estimate of the angular momentum in that part of the universe which man may call his immediate surroundings, i.e., the solar system and galaxy.
83

A description of some excited states in O16 in terms of axially symmetric 3p - 3h and 4p - 4h bands.

Tng, Whee-Keng. January 1969 (has links)
No description available.
84

Two-Neutron Stripping Reactions Leading to the 153Sm, 178Yb, and 180Hf Nuclei

Nowikow, Igor George 03 1900 (has links)
<p> The (t,p) reaction has been performed on targets of 151Sm, 176Yb and 178Hf. The experiment was performed with 15 MeV tritons. The outgoing protons were analyzed with the Enge split-pole spectrograph. Angular distributions were measured for all three nuclei with special emphasis being placed on L=0 transitions.</p> <p> The angular distributions for the 151Sm(t,p)153Sm reaction showed that the distribution of L=0 strength among the low-lying states is not consistent with expectations based on the detailed wavefunctions for 151Sm and 153Sm calculated by two independent groups; Katajanheimo and Hammaren (1978) and Rekstad et al. (1978). The distributions also showed that the total L=0 strength, summed over the four observed states in 153Sm, is much less than for neighbouring nuclei.</p> <p> Angular distributions of the (t,p) reaction on 176Yb and 178Hf targets showed strong L=0 transitions to levels at ~ 1.3 MeV excitation. It is believed that the N=108 energy gap in the Nilsson diagram is the cause of the large L=0 strength observed. At present no quanitative calculation has reproduced the observed phenomenon, however a calculation based on the Volkov model is presently being considered.</p> / Thesis / Master of Science (MSc)
85

Study of the neutron deficient Cerium region : a quasiboson model approach

Antaki, Paul January 1980 (has links)
No description available.
86

Impact Biomechanics of the Head and Neck in Football

Rowson, Steven 22 July 2008 (has links)
The research presented in the thesis explores the biomechanics of the head and neck during impacts in football. The research related to the head is geared towards advancing the current understanding of the mechanisms of mild traumatic brain injury, specifically by investigating head accelerations experienced by football players during impacts. To do this, a six degree of freedom sensor that could be integrated into existing football helmets and is capable of measuring linear and angular acceleration about each axis of the head was developed and validated. This sensor was then installed in the helmets of 10 Virginia Tech football players and data was recorded for every game and practice during the 2007 football season. A total 1712 impacts were recorded, creating a large and unbiased dataset. No instrumented player sustained a concussion during the 2007 season. From 2007 head acceleration dataset, 24 of the most severe impacts were modeled using a finite element head model, SIMon (Simulated Injury Monitor). Besides looking at head acceleration, the force transmitted to the mandible by chin straps in football helmets was investigated through impact testing. Little research has been conducted looking at the mandible-chin strap interface in the helmet, and this may be an area of helmet design that can be improved. The research presented in this thesis related to the neck is based on stingers. Football players wear neck collars to prevent stingers; however, their designs are largely based on empirical data, with little biomechanical testing. The load limiting capabilities of various neck collars were investigated through dynamic impact testing with anthropomorphic test devices. It was found that reductions in loads correlate with the degree to which each collar restricted motion of the head and neck. To investigate the differences in results that using different anthropomorphic test devices may present, the matched neck collar tests were performed with the Hybrid III and THOR-NT 50th percentile male dummies. The dummies exhibited the same trends, in that either a load was reduced or increased; however, each load was affected to a different degree. / Master of Science
87

Development of the Adaptive Collision Source Method for Discrete Ordinates Radiation Transport

Walters, William Jonathan 08 May 2015 (has links)
A novel collision source method has been developed to solve the Linear Boltzmann Equation (LBE) more efficiently by adaptation of the angular quadrature order. The angular adaptation method is unique in that the flux from each scattering source iteration is obtained, with potentially a different quadrature order used for each. Traditionally, the flux from every iteration is combined, with the same quadrature applied to the combined flux. Since the scattering process tends to distribute the radiation more evenly over angles (i.e., make it more isotropic), the quadrature requirements generally decrease with each iteration. This method allows for an optimal use of processing power, by using a high order quadrature for the first few iterations that need it, before shifting to lower order quadratures for the remaining iterations. This is essentially an extension of the first collision source method, and is referred to as the adaptive collision source (ACS) method. The ACS methodology has been implemented in the 3-D, parallel, multigroup discrete ordinates code TITAN. This code was tested on a variety of test problems including fixed-source and eigenvalue problems. The ACS implementation in TITAN has shown a reduction in computation time by a factor of 1.5-4 on the fixed-source test problems, for the same desired level of accuracy, as compared to the standard TITAN code. / Ph. D.
88

Extracting the Rotational Degrees of Freedom From a Reconstructed Three-Dimensional Velocity Field Along With an Analytical Demonstraton and a Proposed Method for Experimental Verification

DeVlaminck, James Raymond 26 July 2001 (has links)
A theoretical method for extracting the rotational degrees of freedom from a reconstructed three-dimensional velocity field has been developed. To extract the angular velocities the curl of the translational velocities must be performed. The three-dimensional velocity field is to be equally spaced so that the DFT-IDFT technique of taking partial derivatives of the translational velocities is used. A program was written in C along with MATLAB® which performed the theoretical calculations. Two proposed methods of experimentally verifying the angular velocity data is developed using a Kistler translational/angular piezobeam accelerometer to compare against the DFT-IDFT partial derivative technique for calculating the angular velocities. / Master of Science
89

An Ultrasonic Angular Measurement System

Redd, Justin D. 10 1900 (has links)
International Telemetering Conference Proceedings / October 25-28, 1993 / Riviera Hotel and Convention Center, Las Vegas, Nevada / An original design is presented for a system capable of measuring the relative angle of a flat surface using reflected ultrasonic wave pulses. No physical contact with the surface is necessary. The measurement range is from 0 to 54 degrees. Theoretical resolution is 5 minutes of arc, with actual measured resolution of approximately 20 minutes of arc. The system has performed successfully in limited flight tests, is capable of rates up to 80 angle measurements per second, and has a solid-state memory recording capacity of 24,000 bytes. The measurements are time-tagged as they are recorded and may be transferred to a personal computer at a later time over a standard RS-232 serial communications link. The system is small (approx. 6 by 4 by 1.5 inches) and uses two standard 9-volt batteries as its power source.
90

[en] A STUDY OF THE ANGULAR RESOLUTION OF THE PIERRE AUGER OBSERVATORY / [pt] ESTUDO DA RESOLUÇÃO ANGULAR DO OBSERVATÓRIO PIERRE AUGER

CLAUDIA ELENA FRACCHIOLLA LOPEZ 28 December 2007 (has links)
[pt] O Observatório Pierre Auger, cuja construção na Província de Mendoza, na Argentina está na sua fase final, tem por objetivo medir as características dos raios cósmicos de grande energia. O Observatório está produzindo dados desde o início de 2004, à medida em que a rede de detectores vai aumentando. Um dos principais temas de pesquisas, usando os dados produzidos pelo detector, é o exame da anisotropia na direção de origem dos raios cósmicos energéticos. Para isto é necessário entender-mos a resolução angular do detector. Nesta tese, estudamos a resolução angular dos detectores de Superfície (ou detectores de radiação de Cherenkov). O principal elemento que limita a acuracidade angular dos detectores de superfície é a precisão temporal do registro dos sinais de chegada dos raios cósmicos. Este estudo está baseado na comparação dos sinais em um conjunto de tanques que estão muito próximos um do outro (11 metros). / [en] The Pierre Auger Observatory, in the Province of Mendoza Argentina, is in its final phases of construction. Its aimed to determine the characteristics of high energy cosmic rays. The Observatory is collecting data since the beginning of 2004, while the size of the array continue increasing. One of the main topics of research of Auger, is the study of the anisotropy of the arrival direction of the energetic cosmic rays. For that purpose it is necessary to have a good estimative of the angular resolution of the detector. The main limiting element on the accuracy of the angular determination is the arrival time of the particles generated by the cosmic ray in the detectors. In this thesis we study the angular resolution of the Surface Detector (or the Cherenkov radiation detector). This study is based on the comparison of the signals in a subset of detectors deployed very close one from the other (11 m).

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