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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.
21

none

Hwang, Rong-shune 14 February 2007 (has links)
Inventory is that enterprises operate the indispensable goods, materials and equipments, inventory management and making policy for a quite important ring in business administration, the category of inventory management is very wide, there are also a lot of relevant documents, this research probes into the government undertaking under the circumstances that government's law of purchase is limited mainly, how to choose to purchase the way and build and purchase the rightest purchase way bestly. This research regards some government undertaking as the research object, take materials of this wide-band network modem ATU-R of company as an example, probe into the best way of purchasing, discover, under the current system, taking the competitive bidding way, because the result of the price that the market competes, the unit price of the award of bid is reduced year by year, can charge the advantage of saving the purchase cost, but because the purchasing case has one's tender accepted in the manufacturer all not the same each time, increasing will train and link and transport the cost in the future, propose considering and use selected bidding or call for bid restrictedly, make equipment to be simple to take, is it is it work simple and convenient to take to transport to link. In addition, this research utilizes the management theory of stocks, is it construct one order stock management style of spread delivery, expect in meet service level make stock total cost for being most low to build, discover, the materials of company's wide-band network modem ATU-R of the case, are suitable for adopting and ordering the management style of stocks regularly, best to order cycle one day, only for cooperate with supplies make an inventory the homework regularly every month such as Company such as case, order cycle and change to for 30 days, under meeting the service level that the case company sets up, the consumption that its safe stock should have three weeks at least, the supreme stock is 79,013 in busy season, the supreme stock is 61,425 usually. Company's personnel cost of the case increases year by year, and face privatization, personnel might in a large amount from retreat, the human resources fall short gradually, under the circumstances that other conditions do not change, it is 60 days to order cycle and extend, its total stock cost is average to only increase by 126,807 yuan every year, the case company depends on in the future visual manpower uses the situation, consider adopting for two months and ordering and taking second place in the order way.
22

The abundance of boron in diffuse interstellar clouds /

Ritchey, Adam M. January 2009 (has links)
Dissertation (Ph.D.)--University of Toledo, 2009. / Typescript. "Submitted to the Graduate Faculty as partial fulfillment of the requirements for the Doctor of Philosophy Degree in Physics." Bibliography: leaves 113-121.
23

Star formation in molecular clouds

Vutisalchavakul, Nalin 18 September 2015 (has links)
There has been many recent observations in the area of star formation. High-resolution observations of other galaxies enabled a study of extragalactic star formation in more detailed while large scale surveys of the Milky Way enabled a more comprehensive study of Galactic star formation. The main goal of this thesis is to use multi-wavelength, large-scale observations of the Milky Way to connect Galactic to extragalactic star formation and to study star formation regulation in molecular clouds. We tested the use of extragalactic star formation rate tracers on nearby molecular clouds and found that the total infrared and 24 μm luminosity underestimate star formation rates of nearby molecular clouds by a large factor, indicating a problem of using extragalactic tracers of star formation on small regions and regions with low mass or low star formation rates. We studied the relation between star formation and molecular gas distribution in a 11 square degree of the Galactic Plane on various spatial scales starting from a clump scale of around few parsecs to a scale of ≈ 200 parsec. The result shows a good correlation between molecular gas and star formation on a scale above ≈ 5 − 8′. The star formation relation that is seen on disk-averaged scales in other galaxies shows a large scatter on the small scales. We built a catalog of Galactic molecular clouds with measured star formation rates and studied the relations between properties of molecular clouds and star formation. We tested several models of star formation on the catalog of molecular clouds. We found that the dense gas mass shows significant correlations with star formation rates but the depletion time of dense gas varies with other properties of the clouds. We found that the free- fall efficiency is higher in dense gas compared to the general molecular gas of the clouds.
24

Conversion of one-way street pairs to two-way operations in downtown Birmingham

Chemmannur, Jugnu. January 2008 (has links) (PDF)
Thesis (M.S.)--University of Alabama at Birmingham, 2008. / Description based on contents viewed Feb. 10, 2009; title from PDF t.p. Includes bibliographical references (p. 74-75).
25

High resolution simulations of galactic cannibalism

Connors, Timothy W. January 2008 (has links)
Thesis (PhD) - Swinburne University of Technology, 2008. / A dissertation presented in fulfillment of the requirements for the degree of Doctor of Philosophy, Swinburne University of Technology - 2008. Typescript. Bibliography: p. 133-145.
26

A study of some problems of interstellar matter

Donn, Bertram. January 1952 (has links)
Thesis--Harvard University. / Bibliography: leaves 175-183.
27

Potential model of SU(3)-symmetry breaking for mesons

Khalil, A. B. January 1967 (has links)
No description available.
28

Radio studies of ionized hydrogen in the southern Milky Way

Gaylard, Michael John January 1990 (has links)
This thesis describes the results of a survey of the HI42ɑ recombination line emission at 2.3 GHz from HII regions in the Southern Milky Way, carried out with the 26 m diameter Hartebeesthoek radio telescope. The Galactic Longitude range covered was 290° to 40°. Single recombination lines were detected from 375 positions. Multiple lines were observed towards 90 positions in the inner Galaxy. No line emission could be detected in 28 positions. Continuum antenna temperatures were estimated from drift scans or radio maps observed for the purpose. LTE electron temperatures and turbulent velocities of the HII regions were calculated where possible. The properties of the sample were compared to those observed in HI09ɑ surveys. The lines observed from over 50 positions were first detections, of which half were associated with optically-identified HII regions. In about 150 cases the lines were only the second to be detected from those HII regions. The processes of the radio emission, detection, and analysis were simulated numerically. The detectability of the emission and the magnitude of non-LTE effects and pressure-broadening in multi-component HII regions was predicted and compared to observations. The radio luminosity function of the HII regions was determined over a range of three orders of magnitude in intrinsic brightness for the first time, using techniques which corrected for different types of incompleteness in the samples. The luminosity function was compared to those in five selected spiral galaxies, and shown to lie between those of M33 and M81. An alternate form of the luminosity function was developed for use with a numerical model of the spiral arm structure of the Milky Way. The physical parameters defining the major spiral arms were established by comparing synthesized diagrams of radial velocity versus Galactic Longitude with those actually observed. The faint, extended HII regions S9 and RCW129 in Scorpius, the Barnard Loop in Orion, and S296 in Canis Major were analyzed, using all available data. All the recombination lines from these HII regions were first detections
29

Multiple Testing Procedures for One- and Two-Way Classified Hypotheses

Nandi, Shinjini January 2019 (has links)
Multiple testing literature contains ample research on controlling false discoveries for hypotheses classified according to one criterion, which we refer to as `one-way classified hypotheses'. However, one often encounters the scenario of `two-way classified hypotheses' where hypotheses can be partitioned into two sets of groups via two different criteria. Associated multiple testing procedures that incorporate such structural information are potentially more effective than their one-way classified or non-classified counterparts. To the best of our knowledge, very little research has been pursued in this direction. This dissertation proposes two types of multiple testing procedures for two-way classified hypotheses. In the first part, we propose a general methodology for controlling the false discovery rate (FDR) using the Benjamini-Hochberg (BH) procedure based on weighted p-values. The weights can be appropriately chosen to reflect one- or two-way classified structure of hypotheses, producing novel multiple testing procedures for two-way classified hypotheses. Newer results for one-way classified hypotheses have been obtained in this process. Our proposed procedures control the false discovery rate (FDR) non-asymptotically in their oracle forms under positive regression dependence on subset of null p-values (PRDS) and in their data-adaptive forms for independent p-values. Simulation studies demonstrate that our proposed procedures can be considerably more powerful than some contemporary methods in many instances and that our data-adaptive procedures can non-asymptotically control the FDR under certain dependent scenarios. The proposed two-way adaptive procedure is applied to a data set from microbial abundance study, for which it makes more discoveries than an existing method. In the second part, we propose a Local false discovery rate (Lfdr) based multiple testing procedure for two-way classified hypotheses. The procedure has been developed in its oracle form under a model based framework that isolates the effects due to two-way grouping from the significance of an individual hypothesis. Simulation studies show that our proposed procedure successfully controls the average proportion of false discoveries, and is more powerful than existing methods. / Statistics
30

Secure Remote Access to Telemetry: A Study in How to Allow Remote Access to Satellite Telemetry Data

McClinton, Arthur T., Jr. 10 1900 (has links)
ITC/USA 2009 Conference Proceedings / The Forty-Fifth Annual International Telemetering Conference and Technical Exhibition / October 26-29, 2009 / Riviera Hotel & Convention Center, Las Vegas, Nevada / The need to allow remote access to telemetry data from closed networks has long existed. To ensure the correct engineers are available for anomaly resolution, NOAA developed the Secure Remote Access Server (SRAS) to allow transfer of satellite telemetry to an external secure server. SRAS uses one-way links to protect the ground system and secure communications for all communications with the user. After the SRAS was developed, a similar system was developed to support file transfers. This paper provides an overview of these systems and lessons learned in the development of one-way fiber systems.

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