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.
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Showing 1 to 20 of 939 for “"SIGMA"”.
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ACE vs. Six Sigma
… popular and well known of these systems is Six Sigma that was developed by Motorola and successfully adopted by others such as Allied Signal (now Honeywell) and most notably, General Electric. Six Sigma can be characterized as a highly formalized, process oriented improvement tool that is data …
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Sigma Ratings Case Study
… study focuses on MIT startup and delta v alumnus Sigma Ratings, a non-credit agency, founded in 2017 by Gabrielle Haddad and Stuart Jones Jr. It immerses the reader in the decision-making process of the company, after its business model revealed major flaws necessitating a pivot to ensure its …
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The reactions K-p -> Sigma±pi±, Sigma±pi±pi+pi-, and Sigma±pi±K+K- at 4.1 GeV/c and 5.5 GeV/c
… results from lower energies. The data for Sigma+pi- is interpreted in terms of the Regge pole model. A search for the existence of hyperorin resonances in the mass region above 1900 MeV/c2 is made in the Sigma±pi±K+K- data, but no evidence for such resonances is found. Consistent with …
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Structural Analysis of an RNA Polymerase Sigma Factor and Its Anti-sigma: sigma28/FLGM
<p>Eubacterial sigma (σ) factors are required during the initiation of transcription, where they play key roles in promoter recognition, melting, and transcriptional regulation, sigma is a dissociable subunit of RNA polymerase (RNAP), and sequence-specifically recognizes promoters, but only after …
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Sigma Models with Repulsive Potentials
<p>Motivated by questions arising in the study of harmonic maps and Yang Mills theory, we study new techniques for producing optimal monotonicity relations for geometric partial differential equations. We apply these results to sharpen epsilon regularity results. As a sample application, we analyze …
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Aspects of Topological Sigma Models
… subsector of certain N = (0, 2) nonlinear sigma models1 is. Additionally, A-twisted Landau-Ginzburg models---twisted nonlinear sigma models with superpotentials---are analyzed and related via renormalization group flow to correlation functions in topological conformal field theories. In …
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Measurement of the ratios of the branching fractions [Beta](B⁰[sigma] --> D⁻[sigma][pi]⁺ [pi]⁺[pi]⁻)/[Beta](B⁰ --> D⁻[pi]⁺ [pi]⁺[pi]⁻) and [Beta](B⁰[sigma] --> D⁻[sigma][pi]⁺)/[Beta](B⁰ --> D⁻[pi]⁺ [pi]⁺[pi]⁻).
We present the measurement of the ratios of branching fractions B... to B..., and B... to B... We analyze data taken with the CDF II detector that corresponds to an integrated luminosity of 355 pb - 1 in pp collisions at ... TeV at the Fermilab Tevatron. Using a novel displaced track trigger we …
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Six Sigma methodology in automobile industry.
… are needed for efficiently implementing six-sigma in the organization to Improve Process. The Analysis aims to reduce/eliminate customer complaints, PTD (Prior to delivery-Dealers) warranty & 0 to 90 days warranty (Customer) costs caused by Steering Wheel Alignment claims. Six-Sigma …
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Applications of gauged linear sigma models
… to a study of applications of gauged linear sigma models. First, by constructing (0,2) analogues of Hori-Vafa mirrors, we have given and checked proposals for (0,2) mirrors to projective spaces, toric del Pezzo and Hirzebruch surfaces with tangent bundle deformations, checking not only …
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Progettazione e sintesi di ligandi sigma selettivi
ABSTRACT Ligandi selettivi per recettori sigma-1 e sigma-2, possono essere farmaci potenzialmente utili per il trattamento di diverse condizioni patologiche, quali disturbi psichiatrici, abuso di cocaina, memoria e disturbi di apprendimento, discinesia e reazioni distoniche indotte da farmaci …
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Torus equivariant elliptic cohomology and sigma orientations
… applications, we construct global sections for sigma functions and relates these sections to the elliptic orbifold genera.
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Circuit level synthesis for delta-sigma converters
… a discrete-time, one-bit, oversampling delta-sigma analog-to-digital modulator circuit synthesis tool in MATLAB script. With the parameters of center frequency, loop order, oversampling ratio, and minimum capacitor size, a user can utilize the program to generate a semi-optimized transistor …
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A bandpass sigma delta modulator IF receiver
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1997.
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Applying Six Sigma to Tenneco Automotive manufacturing
… Fortune 500 companies have had with Six Sigma. The information was obtained through a series of interviews with people, mostly senior managers, who have had direct experience leading a portion of their company's Six Sigma efforts. ** Six Sigma Models: This section reports the financial …
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A fourth order [Sigma] [Delta] bandpass modulator
A fourth order bandpass [Sigma] [Delta] modulator is proposed to digitize signals from a MEMS gyroscope. The modulator samples the amplitude-modulated signal at eight times the carrier frequency and achieves an SNR of 82dB with a sampling frequency of 640kHz and a bandwidtn o 1.oKnz. ms document …
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Gauged Linear Sigma Model and Mirror Symmetry
… thesis is devoted to the study of gauged linear sigma models (GLSMs) and mirror symmetry. The first chapter of this thesis aims to introduce some basics of GLSMs and mirror symmetry. The second chapter contains the author's contributions to new exact results for GLSMs obtained by applying …
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Expression of sigma receptors in human cancer cell lines and effects of novel sigma-2 ligands on their proliferation
Sigma receptors originally thought to be an opioid receptor is now categorized as a distinct class of receptor. There are two main subtypes, the sigma-1 receptor and an uncharacterised binding site, named the sigma-2 binding site. The presence of the sigma-2 binding site shows high correlation with …
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Sigma gyártósor korszerűsítése a Lego Manufacturing kft. - nél
A gyártósoron, a termékek szállítására használt paletta mechanikus, rugós csappal van ellátva, melynek pozícióját pneumatikus munkahenger állítja át annak függvényében, hogy a termék minösége megfelelö -e, vagy nem. Ezen technológia kiváltásra kerül olyan termékazonosítási technológiával, mely …
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ALL-OPTICAL DELTA-SIGMA MODULATOR DESIGN AND IMPLEMENTATION
… to design and implement all-optical delta-sigma modulator (ODSM) has been expanded. The two main blocks of this modulator are “leaky integrator” and “bi-stable switch” designed and implemented by using active element like semiconductor optical amplifier (SOA) and other passive elements like …
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