Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 160 for “"Tightening"”.
-
Tightening curves and graphs on surfaces
… to such local operations as homotopy moves. Tightening is the process of deforming given curves into their minimum position; that is, those with minimum number of self-intersections. While such operations and the tightening process has been studied extensively, surprisingly little is known …
-
Does Tightening Auditing Standards Improve or Impair Welfare?
This study investigates the effects of tightening auditing standards in a setting of an oligopolistic audit market and a competitive capital market. I look at how tightening auditing standards affects audit quality, audit fee, audit market share, stock price, and investment decisions. Two audit …
-
Bound tightening to improve branch-and-bound mixed-integer programming
Includes bibliographical references.
-
Digital phase tightening for improved spatial resolution in millimeter-wave imaging systems
… system using a technique called digital phase tightening for improved spatial resolution. Digital phase tightening uses feedback and oversampling to accurately measure the amplitude and phase of an incoming signal. Furthermore, it can be implemented using only a delay-lock loop, an …
-
Democratizing innovation in the Department of Defense : a model for improving innovation in an era of fiscal tightening
Democratized innovation is a paradigm characterized by users moving beyond the traditional construct that portrays them as passive recipients of firm-developed products. This field of research was launched by Professor Eric von Hippel in the 1970s with his landmark study on the scientific …
-
An Investigation of Anchor Nut Loosening and Review of Tightening Procedures for Anchor Rods in Highway Ancillary Structures
… There is concern regarding the current tightening procedures specified in the various federal and state specifications. Improper tightening can potentially lead to anchor nut loosening under the effect of wind-induced vibrations. In ancillary structures, the anchor rods and nuts are …
-
The Variability of Strains in Bolts and the Effect on Preload in Jointed Structure
… wrenches are the most common method used for tightening bolts; however, this method can cause a large amount of uncertainty in the resulting bolt preload. With the inability to determine the preload in bolted structures precisely, overdesign is necessary for bolts to meet safety requirements …
-
Evaluation of Training Technique as a Means of Influencing Safety Knowledge, Risk Perception and Proper Respirator Donning Ability Among Respiratory Protection Users
… in ability to properly convey headstrap tightening. Based on QFT pass/fail results, the systematic interactive multimedia training was shown to be more effective at training headstrap tightening for full-facepiece than half-facepiece respirators, as it resulted in the least number of QFT …
-
Essays in Liquidity and Financial Markets
… estimations, this study provides evidence that a tightening of funding liquidity increases spreads, effect which is three times larger in magnitude for high-CDS entities compared to low-CDS firms. Moreover, this paper highlights the impact of the 'CDS Small Bang' regulatory changes, especially the …
-
Becoming-Virgin: Re-Virginisation Practices in Turkey
… hymenoplasty (sometimes accompanied by vaginal tightening surgery) or buy a product called artificial hymen (accompanied by vaginal tightening cream). Based on 55 in-depth interviews with healthcare staff, artificial hymen retailers, re-virginisers, and women and men who are not directly related …
-
Stress Estimation Using Clock Spring Modeling Techniques in Twist Capsule Design
… two layers of Kapton, which rolls onto itself tightening against the shaft at one extreme and rolling out against the frame at the other extreme. This cyclic tightening and loosing can cause stresses on these flex tapes consequently, resulting in their failure due to fatigue. Therefore, it is …
-
Variable horizon model predictive control: robustness and optimality
… parameters. In addition, a modified constraint tightening formulation is introduced to provide robust completion in the presence of bounded disturbances. Different contingency scenarios are presented and numerical simulations demonstrate the formulation’s efficacy. Next, complexity reduction is …
-
Key receiver circuits for digital beamforming in millimeter-wave imaging
… of 107mW. A new technique called digital phase tightening reduces phase noise from receiver front-end circuits to allow precise phase estimation for digital beamforming. This technique leverages the large ratio between the MMW carrier frequency and the low frame rates in imaging applications. By …
-
The Unreasonable Usefulness of Approximation by Linear Combination
… on those that can be systematically improved by tightening numerical parameters such that as the parameter approaches zero the approximation becomes exact. These techniques are first applied to Hartree-Fock theory and then we attempt to design a linear scaling massively parallel electron …
-
Three essays on energy economics: Policy options and evaluation
… of my dissertation studies the effects of tightening renewable energy standards on carbon dioxide emissions and renewable generation. My co-author and I first use an analytical general equilibrium model to explain why tightening a state's Renewable Portfolio Standard (RPS) unambiguously …
-
DESIGN & DEVELOPMENT OF PLANAR SOLID OXIDE FUEL CELL STACK
… stack compression system to determine the proper tightening torque to be applied: this value was 50N. Although this calculation took into consideration the loss of tightening torque at high temperatures, some marks were found in housing and micas during the stack inspection after disassembly. …
-
Essays on Macroeconomics and Banking
… information acquisition by their lenders. Tightening credit standards reduces the rate of non-performing loans, but it also decreases the availability of credit. In response, firms strengthen their lending relationships by concentrating in a smaller number of lenders. When the model is …
-
Determinants of credit spreads on U.S. dollar-denominated Asian corporate bonds
… U.S. monetary easing than to the U.S. monetary tightening, and they also react more strongly to widening U.S. credit spreads than to narrowing U.S. credit spreads.
-
Planning and scheduling proximity operations for autonomous orbital rendezvous
… to the constraints in the modes. Relaxing or tightening the restrictions on the resources illuminates the algorithm's responsiveness to practical resource demands. Changes to the definition of optimality via a cost function indicate that the scheduler reacts to a diverse set of parameters.
-
Cutting Planes for Convex Objective Nonconvex Optimization
This thesis studies methods for tightening relaxations of optimization problems with convex objective values over a nonconvex domain. A class of linear inequalities obtained by lifting easily obtained valid inequalities is introduced, and it is shown that this class of inequalities is sufficient to …
Page 1 of 8