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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.
1

Buyer supplier relationships, lot sizing decisions and payment terms in a supply chain

Pujawan, I. Nyoman January 2000 (has links)
No description available.
2

Interplay of charge and spin ordering in Pr0.65Ca0.35-xSrxMnO3

Huang, Hui-Long 31 May 2002 (has links)
The manganites of the type RMnO3 (R=La, Nd, Pr, Sm) are antiferromagnetic and the end (n= µ) members of the so-called Ruddlesden-Popper series, Rn+1MnnO3n+1. These oxide materials illustrate many interesting properties like colossal magnetoresistance (CMR)1-13, charge ordering (CO)14-21, magnetic field induced structural and ferromagnetic transitions22-24 when R is partially substituted by divalent cation A (=Ca, Sr, Ba, Pb) as R1-xAxMnO3. According our results of resistivity (r) and specific heat (C) on the Pr1-xCaxMnO3 series, we confirmed the Pr0.65Ca0.35MnO3 is the good choice to investigate the interplay of double exchange (DE) interaction and charge(CO)/orbital(OO) ordering. A systematic study of r, magnetization (M) and C on polycrystalline Pr0.65Ca0.35-xSrxMnO3 (x=0-0.35) perovskite manganites has been reported. The T-x phase diagram presenting their electrical and magnetic properties is prevailed. The Pr0.65Ca0.25Sr0.1MnO3 (for x=0.1) sample is particularly unique showing a CO transition at TCO ~ 200K, an antiferromagnetic (AFM) ordering transition at TN ~ 175K, a metal-insulator (MI) transition at TMI ~ 80K and a ferromagnetic (FM) ordering transition at TC ~ 45K in the absence of magnetic fields. However, the C data of it do not show any anomaly at TMI for MI transition but illustrates a much smaller anomaly than expected one at TC and is suppressed by magnetic fields. This may indicate that the FM ordering in it, commonly related to MI transition, is of meta-stable characteristic and is ascribed to electronic and magnetic instability induced by spin fluctuations. This is established from the T-H phase diagram, as well as the thermal and magnetic hysteresis in r, M and C.
3

Neutron scattering studies of spin waves and spinons

Tennant, David Alan January 1994 (has links)
No description available.
4

First-principles investigations of ordering in binary alloys / 978-91-7501-880-5

Rahaman, Moshiour January 2013 (has links)
The aim of the thesis is to study ordering in binary alloys on the basis of first-principles or {\it ab-initio} techniques employing density functional theory (DFT). The ordering phenomena of materials are of crucial importance for technological applications. The results of the thesis are intended to demonstrate the applicability of the first-principles calculations to provide fundamental insight to the true, namely electronic structure, nature of ordering in binary alloys. The main part of the thesis focuses on atomic short- and long-range order phenomena in binary alloys as a function of both temperature and chemical composition in FeCo and NiCr alloys. In particular, the influence of magnetism on atomic ordering in FeCo alloys is investigated using the disordered local moment.A large number of concentration dependent effective cluster interactions, derived without the use of any adjustable parameters, are obtained by the SGPM as it is implemented in the EMTO within the CPA. The SGPM interactions can subsequently be used in thermodynamic Monte-Carlo simulations or mean field approximations to determine the ordering phenomena in binary alloys. First-principles calculations of intrinsic stacking-fault energies (SFE) andanti-phase boundary energies (APBE) in Al$_{3}$Sc and the effects of temperature on SFE and APBE are investigated by using the axial Ising model and supercellapproach. Temperature effects have been taken into consideration byincluding the one-electron thermal excitations in the electronicstructure calculations, and vibrational free energy in the harmonicapproximation as well as by using temperature dependent lattice constants.The latter has been determined within the Debye-Gr{\"u}neisen model,which reproduces well the experimental data. Within the framework of the quasiharmonic approximation, the thermodynamics and elastic properties of B2- FeCo alloy are studied using first-principles calculations. The calculated thermal and elastic properties are found to be in good agreement withthe available measured values when the generalized gradientapproximations is used for the exchange correlation potential.The calculated finite temperature elastic constants show thatthe FeCo alloy is mechanically stable in the ordered phase.Meanwhile, a large elastic anisotropy exhibits a moderate dependence ontemperature. / <p>QC 20130927</p>
5

Production policies under varying degrees of demand uncertainty

Frick, Lynette January 2003 (has links)
No description available.
6

Capitalism, managerialism and the market : the problem of politics in the culture of bureaucratic individualism

McMylor, Peter Martin January 1987 (has links)
This thesis addresses a core problem of the human sciences: the relationship between communal and individual forms of life. In so doing it seeks to raise questions about the acceptance of liberal individualism. This is achieved by the development of certain themes in the work of the philosopher Alasdair Maclntyre, especially those present within his major work After Virtue. This thesis is not a critical study of Maclntyre, but instead attempts to extract, from the work of this major anti-liberal philosopher, elements that can be profitably developed by the human sciences and contribute to a renewal of a socialist politics which is more than one more version of liberal progressivism. The introductory chapter outlines the nature of the problems posed for any kind of communal ism in a liberal polity, the major themes from Maclntyre's work in the last three decades are outlined, in relationship to the question of liberal modernity. This is followed in Chapter One by an outline of some cultural themes concerning concepts of self and community briefly touched on in Maclntyre's work. Chapter Two looks at the impact of liberal culture on its major ideological competitor, Marxism, stressing Maclntyre's complex relationship with the Marxian tradition. Chapters Three and Four examine some of the historical assumptions embodied within Maclntyre's After Virtue. Chapter Three looks at the impact of the capitalist market on our social and moral attitudes. The account of this process is shown to be closely related to the work of the historian Karl Polanyi. Chapter Four looks at the historical relationship between liberalism and bureaucratic practices. In conclusion, Chapter Five examines Maclntyre's alternative to liberal individualism, and connects his narrative account of a human life with other recent developments, in thought and experience.
7

Formal specification and analysis of digital hardware circuits in LOTOS

He, Ji January 2000 (has links)
No description available.
8

Flow-induced ordering of particles in coatings

Jansma, Jon Bennett January 1993 (has links)
No description available.
9

A temporal message ordering and object tracking application

Lakshman, Kaveti January 1900 (has links)
Master of Science / Department of Computing and Information Sciences / Gurdip Singh / TinyOS is an operating system designed for wireless embedded sensor network which supports the component based development language called Nesc. Wireless sensor network are becoming increasingly popular and are being used in various applications including surveillance applications related to object tracking. Wireless sensor devices called motes can generate an event in the network whenever there is some object moving in its vicinity. This project aims to develop an application which detects the path information of object moving in the sensor field by capturing the order of events occurs in the network. This application builds a logical topology called DAG (Directed acyclic graph) between the motes in the network which is similar to the tree topology where a child can have multiple parents which are in communication range and a level closer to the root. Using a DAG, motes can communicate efficiently to order the events occurring in the sensor field. The root of the DAG is the base station which receives all the events occurred in the network and orders them based on the information it has from previous events received. Every event occurring in the network is assigned a time stamp and is identified by a tuple (mote_id, timestamp) which describes that the mote with identity id has detected the object with the timestamp, and ordering all such events based on the timestamps we get the path information. There are two time stamping algorithms written in this project. In the first time stamping algorithm, whenever any event occurs, it updates the timestamp information of the entire neighboring mote in the field and when the object enters in the detection range of neighboring mote of previous detected mote, it assigns the new timestamp. The second time stamping algorithm just send the message to the parent and it passes on to its parent until the message is received at the base station, and base station itself assigns the timestamps based the event on first come first serve basis. The application is tested by displaying the path information received and ordered at the base station.
10

Graph structures and well-quasi-ordering

Liu, Chun-Hung 27 August 2014 (has links)
Robertson and Seymour proved that graphs are well-quasi-ordered by the minor relation. In other words, given infinitely many graphs, one graph contains another as a minor. An application of this theorem is that every property that is closed under deleting vertices, edges, and contracting edges can be characterized by finitely many graphs, and hence can be decided in polynomial time. In this thesis we are concerned with the topological minor relation. We say that a graph G contains another graph H as a topological minor if H can be obtained from a subgraph of G by repeatedly deleting a vertex of degree two and adding an edge incident with the neighbors of the deleted vertex. Unlike the relation of minor, the topological minor relation does not well-quasi-order graphs in general. However, Robertson conjectured in the late 1980's that for every positive integer k, the topological minor relation well-quasi-orders graphs that do not contain a topological minor isomorphic to the path of length k with each edge duplicated. This thesis consists of two main results. The first one is a structure theorem for excluding a fixed graph as a topological minor, which is analogous to a cornerstone result of Robertson and Seymour, who gave such a structure for graphs that exclude a fixed minor. Results for topological minors were previously obtained by Grohe and Marx and by Dvorak, but we push one of the bounds in their theorems to the optimal value. This improvement is needed for the next theorem. The second main result is a proof of Robertson's conjecture. As a corollary, properties on certain graphs closed under deleting vertices, edges, and "suppressing" vertices of degree two can be characterized by finitely many graphs, and hence can be decided in polynomial time.

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