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Lam, C. N. Catherine. "A study of advancing & receding contact angles and contact angle hysteresis." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ58840.pdf.
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Zimmerman, Harold C. "Angles in Britannia ethnic identity and its textual dissemination in Anglo-Saxon England /." [Bloomington, Ind.] : Indiana University, 2006. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3215200.
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Thesis (Ph.D.)--Indiana University, Dept. of English, 2006.Source: Dissertation Abstracts International, Volume: 67-04, Section: A, page: 1354. Adviser: Robert D. Fulk. "Title from dissertation home page (viewed June 18, 2007)."
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Kennedy, Richard C. "A Study on the Effect of Jumbo Angles on the Strength and Stiffness of Top-and-Seat Angle Connections." University of Cincinnati / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1416233620.
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Splittstoesser, Riley Emiel. "A simple method for predicting dynamic lumbar motion segment angles using measures of trunk angle and subject anthropomentry." The Ohio State University, 2001. http://rave.ohiolink.edu/etdc/view?acc_num=osu1302112152.
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Aung, Tin. "Molecular genetic studies of primary open angle and angle closure glaucoma." Thesis, University College London (University of London), 2004. http://discovery.ucl.ac.uk/1446768/.
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Glaucoma, a group of heterogeneous optic neuropathies characterized by progressive visual field loss, is the leading cause of irreversible blindness worldwide. The condition has a substantial heritable basis, as illustrated by the numerous loci and genes identified to date, and the large proportion of patients having a family history. Categorized according to the anatomy of the anterior chamber angle, there are 2 main forms of glaucoma, primary open angle glaucoma (POAG) and primary angle closure glaucoma (PACG). The first half of the thesis describes the molecular genetic study of POAG, while the latter deals with PACG. Primary open angle glaucoma (POAG) accounts for most glaucoma in Caucasian and Afro-Caribbean populations. The condition is classified according to the presence of elevated intraocular pressure (IOP) into high- tension glaucoma (HTG) or normal tension glaucoma (NTG). OPAl, the gene responsible for autosomal dominant optic atrophy represents an excellent candidate gene for POAG (in particular NTG). Single nucleotide polymorphisms on intervening sequence (IVS) 8 of the 0/M7gene (genotype IVS 8 +4 C/T; +32 T/C) were found to be strongly associated with a fifth of NTG cases and may be a marker for disease association, providing the first evidence of an association between OPAl and NTG. However this OPAl genotype was not found to be significantly associated with HTG. Further work did not detect a significant difference in a range of phenotypic features in NTG patients with and without these OPAl polymorphisms, suggesting that these specific genetic variations do not underlie any major phenotypic diversity in NTG. Optineurin (OPTTN), in the GLC1E interval on chromosome 10p, was recently identified as the second gene underlying POAG, with a common mutation, E50K, being found in 13.5% of families, and a M98K variant identified as a significant risk-associated genetic factor for POAG. However when a large panel of 315 sporadic adult POAG subjects were examined for these 2 OPTN sequence variants, the E50K mutation was identified in only 1.5% of NTG subjects, making it an infrequent cause of sporadic NTG. The M98K variant was found to be associated specifically with NTG but not HTG, suggesting allelic heterogeneity between these 2 phenotypes. A characteristic NTG phenotype comprising a young-adult age of onset, advanced visual loss and progressive disease, has been described in individuals carrying the E50K OPTN mutation. Primary angle closure glaucoma (PACG) is the main form of glaucoma in East Asian populations. Two large Singaporean PACG families were examined and the first locus for the disease was identified on chromosome 10 using linkage analysis. The disease interval was refined to 5.0 cM on chromosome 10qll flanked by the markers D10S225 and D10S568, with the maximum LOD score of 3.4 at 0=.00 for D10S220. Several genes, GDF10, TIM23, SLC18A3 and ASAH2 were excluded as candidates for this condition. This molecular genetic study of both POAG and PACG has contributed to our knowledge of glaucoma.
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Richards, Blair. "A comparison of staggered position one angle process color printing with four angle and one angle process color printing /." Online version of thesis, 1988. http://hdl.handle.net/1850/10419.
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Gao, Hua. "Sensor view angle and solar zenith angle effects on grassland canopy spectra." Thesis, The University of Arizona, 1991. http://hdl.handle.net/10150/277935.
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The experiment was conducted at the Kendall Site of the Walnut Gulch Experiment Watershed in southeastern Arizona during the 1990 growing season. A special apparatus for mounting a spectroradiometer and acquiring bidirectional reflectance data was constructed and used over a semi-desert grassland plot. For purposes of analyzing multidirectional vegetation spectral behavior, the Normalized Difference Vegetation Index (NDVI) and Soil Adjusted Vegetation Index (SAVI) were calculated as a function of view angle and solar zenith angle throughout the growing season. The results have shown that the SAVI considerably minimized anisotropic behavior whereas the NDVI was very sensitive to both solar zenith and view angles. With further refinement the SAVI offers a technique whereby satellite measurements of vegetation activity could be further understood.
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Chow, Kit-yee, and 周潔儀. "Angle coverage in wireless sensor networks." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2007. http://hub.hku.hk/bib/B39341835.
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Rodrigues, Vinay. "Triple junctions and low angle boundaries." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/35057.
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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2006.Includes bibliographical references (leaf 21).
Certain properties, such as cracking or corrosion, can occur mainly along grain boundaries. Certain types of boundaries may be more beneficial for material properties. The way that the boundaries are connected in a material can determine how boundaries will affect properties, for instance, whether or not crack resistant boundaries will arrest the growth of a crack. Boundaries in a polycrystalline material connect together at triple junctions. In this paper, we examine how the distribution of low angle boundaries at triple junctions varies with the texture of a material.
by Vinay Rodrigues.
S.B.
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Higgins, Adam. "Design of all-bolted extended double angle, single angle, and tee shear connections." [Gainesville, Fla.] : University of Florida, 2005. http://purl.fcla.edu/fcla/etd/UFE0009361.
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Kay, Andrew. "Angle and distance geometry problems." Thesis, University of Oxford, 1991. http://ora.ox.ac.uk/objects/uuid:6765f1e6-e07c-4029-993f-a5b0d9657050.
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Distance geometry problems (DGPs) are concerned with the construction of structures given partial information about distances between vertices. I present a generalisation which I call the angle and distance geometry problem (ADGP), in which partial angle information may be given as well. The work is primarily concerned with the algebraic and theoretical aspects of this problem, although it contains some information on practical applications. The embedding space is typically real three dimensional space for applications such as computer aided design and molecular chemistry, although other embedding spaces are possible. I show that both DGP and ADGP are NP-hard, but that in some sense the ADGP is more expressive than the DGP. To combat the problems of NP-hardness I present some graph theoretic heuristics which may be applied to both DGP and ADGP, and so reduce the time required by general purpose algorithms for their solution. I discuss the general purpose algorithms Cylindrical Algebraic Decomposition and Gröbner bases and their application to this field. In addition, I present an O(n) parallel algorithm for computing convex hulls in three dimensions, using O(n2) processors connected in a mesh-like topology with no shared memory.
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El-Gohary, Mahmoud Ahmed. "Joint Angle Tracking with Inertial Sensors." PDXScholar, 2013. https://pdxscholar.library.pdx.edu/open_access_etds/661.
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The need to characterize normal and pathological human movement has consistently driven researchers to develop new tracking devices and to improve movement analysis systems. Movement has traditionally been captured by either optical, magnetic, mechanical, structured light, or acoustic systems. All of these systems have inherent limitations. Optical systems are costly, require fixed cameras in a controlled environment, and suffer from problems of occlusion. Similarly, acoustic and structured light systems suffer from the occlusion problem. Magnetic and radio frequency systems suffer from electromagnetic disturbances, noise and multipath problems. Mechanical systems have physical constraints that limit the natural body movement. Recently, the availability of low-cost wearable inertial sensors containing accelerometers, gyroscopes, and magnetometers has provided an alternative means to overcome the limitations of other motion capture systems. Inertial sensors can be used to track human movement in and outside of a laboratory, cannot be occluded, and are low cost. To calculate changes in orientation, researchers often integrate the angular velocity. However, a relatively small error or drift in the measured angular velocity leads to large integration errors. This restricts the time of accurate measurement and tracking to a few seconds. To compensate that drift, complementary data from accelerometers and magnetometers are normally integrated in tracking systems that utilize the Kalman filter (KF) or the extended Kalman filter (EKF) to fuse the nonlinear inertial data. Orientation estimates are only accurate for brief moments when the body is not moving and acceleration is only due to gravity. Moreover, success of using magnetometers to compensate drift about the vertical axis is limited by magnetic field disturbance. We combine kinematic models designed for control of robotic arms with state space methods to estimate angles of the human shoulder and elbow using two wireless wearable inertial measurement units. The same method can be used to track movement of other joints using a minimal sensor configuration with one sensor on each segment. Each limb is modeled as one kinematic chain. Velocity and acceleration are recursively tracked and propagated from one limb segment to another using Newton-Euler equations implemented in state space form. To mitigate the effect of sensor drift on the tracking accuracy, our system incorporates natural physical constraints on the range of motion for each joint, models gyroscope and accelerometer random drift, and uses zero-velocity updates. The combined effect of imposing physical constraints on state estimates and modeling the sensor random drift results in superior joint angles estimates. The tracker utilizes the unscented Kalman filter (UKF) which is an improvement to the EKF. This removes the need for linearization of the system equations which introduces tracking errors. We validate the performance of the inertial tracking system over long durations of slow, normal, and fast movements. Joint angles obtained from our inertial tracker are compared to those obtained from an optical tracking system and a high-precision industrial robot arm. Results show an excellent agreement between joint angles estimated by the inertial tracker and those obtained from the two reference systems.
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Ivanov, Ivan Yavorov. "Etude biophysique et structurale du complexe de réplication des virus à ARN négatif." Thesis, Grenoble, 2011. http://www.theses.fr/2011GRENV083/document.
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Les rhabdovirus, dont les virus de la stomatite vésiculaire (VSV) et de la rage (RAV) constituent des prototypes, sont des virus enveloppés dont le génome est constitué d'une seule molécule d'ARN simple brin de polarité négative qui font partie de l'ordre des Mononegavirales (MNV). La machinerie de transcription/réplication de ces virus est constituée de l'ARN génomique et de trois protéines qui sont communes à tous les virus de l'ordre des MNV, la (N) qui encapside le génome viral, la grande sous-unité de l'ARN polymérase ARN dépendante (L) et la phosphoprotéine (P) qui est un cofacteur non-catalytique de la L et sert de chaperonne à la N. Le premier objectif de mon travail de thèse consistait à déterminer la structure cristallographique du domaine de dimérisation de la phosphoprotéine du virus de la rage. La P des rhabdovirus est une protéine modulaire qui contient deux régions intrinsèquement désordonnée, un domaine central responsable la dimérisation et un domaine C-terminal responsable de la fixation sur la matrice N-ARN. Le modèle atomique obtenu à une résolution de 1.5A montre que la structure est très différente de celle du domaine correspondant chez VSV. Le second objectif de mon travail était la caractérisation structurale de la grande sous-unité L de la polymérase du virus de la stomatite vésiculaire. Cette enzyme de 2109,aa, possède six régions conservées. Le domaine conservé III comprend les régions impliquées dans l'activité de polymérisation et les domaines V et VI sont responsables de la formation de la coiffe des ARNm. Plusieurs stratégies ont été envisagées successivement. (1) Sur la base de prédictions de structures secondaires et de prédictions de désordre, nous avons essayé d'exprimer différents fragments en système d'expression bactérien. Les constructions testées se sont avérées insolubles et certaines d'entre elles fixaient GroEL, indiquant un problème de repliement. (2) Nous avons alors essayé d'exprimer la L seule ou en complexe avec la P en système d'expression eucaryote. La purification s'est avérée impossible, la protéine L restant toujours associées à des protéines cellulaires visibles par coloration au bleu de Coommassie. (3) Finalement nous avons réussi à purifier la polymérase à partir de virus entier. La préparation de la polymérase était très homogène et a permis d'entreprendre une caractérisation par microscopie électronique. Une classification d'images a permis de construire un premier modèle à basse résolution. Le modèle révèle la présence d'un domaine annulaire avec plusieurs domaines structurés attachés au coeur de la polymérase. La cryo-microscopie électronique et la tomographie permettront d'obtenir plus de détails sur cette protéineRhabdoviruses, including vesicular stomatitis virus (VSV) and rabies virus (RAV), are enveloped viruses which genome is made of a single molecule of negative-sense RNA and are classified in the order Mononegavirales (MNV). The transcription/replication machinery of these viruses consists of the genomic RNA and of three proteins, which are common to all other viruses of the order MNV, a nucleoprotein (N) that encapsidates the viral genome, a large subunit of the RNA-dependent RNA polymerase (L) and a phosphoprotein (P) that acts as a non-catalytic cofactor of L and a chaperone of N. The first goal of my research project was to determine the crystallographic structure of the dimerization domain of the rabies virus phosphoprotein. The P protein of the rhabdoviruses is a modular protein, which contains two intrinsically disordered regions, a central dimerization domain and a C-terminal domain involved in binding to the N-RNA template. The atomic model obtained at a resolution of 1.5 A showed that the structure is different from that of the corresponding domain of VSV. The second goal was the structural characterization of the large subunit L of VSV polymerase. The enzyme of 2109 aa has six conserved regions. Conserved region III includes the residues involved in the RNA synthesis activity, whereas domains V and VI are involved in mRNA capping formation. Three strategies were successively developed: (1) On the basis of secondary structure and disorder predictions, we tried to express different fragments in bacterial expression systems. These constructions appeared to be insoluble and some of them bound GroEL suggesting a folding problem; (2) We tried to express L alone or co-express it with P in eukaryotic expression system. The purification appeared to be impossible, the L protein always remaining associated with host-cell proteins in amounts detectable by Coommassie staining; (3) We succeeded in purifying the L protein from the virus. The L samples were homogenous and allowed a characterization by electron microscopy. Image classes allowed the reconstruction of a first low-resolution model. This model revealed the presence of a large ring-like domain and several globular domains. Cryo-electron microscopy and tomography should lead to a more detailed description of this protein
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Chun, Hon Ming. "Large-angle slewing maneuvers for flexible spacecraft." Thesis, Massachusetts Institute of Technology, 1986. http://hdl.handle.net/1721.1/15093.
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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1986.MICROFICHE COPY AVAILABLE IN ARCHIVES AND SCIENCE.
Bibliography: leaves 210-218.
by Hon Ming Chun.
Ph.D.
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Nygren, Björn. "Angle Damping in Bundle Adjustment." Thesis, Umeå universitet, Institutionen för fysik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-160547.
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Bundle Adjustment is a common fine-tuning step used in photogrammetry. It uses different types of parameters, some of which can be considered to be almost linear while others can be considered to be highly nonlinear, e.g. the rotational parameters. However, in the Bundle Adjustment process all parameters are treated equal. In concert with a poor initial estimate, this might cause Bundle Adjustment to diverge. In this report, two novel methods based on the damped Gauss-Newton with Armijo linesearch, modified by giving rotational parameters a special treatment, are tested. These methods, Clamped Alpha and Linear Exponential Search, are compared to Gauss-Newton with Armijo linesearch, as well as to the undamped Gauss-Newton method, also known as the Gauss-Markov method. Parameter sweeps over different perturbation levels for the angular parameters show that each of the three damped methods outperform the Gauss-Newton method. Notably, the Clamped Alpha method also outperforms the other two damped methods, with as much as 16 times as many convergent cases for a given perturbation level. Meanwhile, the average number of iterations is increased by only 1.8 times that of the Gauss-Newton with Armijo linesearch. The results add to existing research arguing for the use of damped methods in Bundle Adjustment. In particular, the simple and cheap Clamped Alpha method is potentially attractive for problems where the uncertainty of the camera angles is significant. While the Clamped Alpha method show promising results, it should be noted that the experiments in this study are on synthetic data. In order to solidify these results, further investigations into the performance of Clamped Alpha using real-world data should be conducted.
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He, Mu. "The Torsion Angle of Random Walks." TopSCHOLAR®, 2013. http://digitalcommons.wku.edu/theses/1242.
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In this thesis, we study the expected mean of the torsion angle of an n-stepequilateral random walk in 3D. We consider the random walk is generated within a confining sphere or without a confining sphere: given three consecutive vectors →e1 , →e2 , and →e3 of the random walk then the vectors →e1 and →e2 define a plane and the vectors →e2 and →e3 define a second plane. The angle between the two planes is called the torsion angle of the three vectors. Algorithms are described to generate random walks which are used in a particular space (both without and with confinement). The torsion angle is expressed as a function of six variables for a random walk in both cases: without confinement and with confinement, respectively. Then we find the probability density functions of these six variables of a random walk and demonstrate an explicit integral expression for the expected mean torsion value. Finally, we conclude that the expected torsion angle obtained by the integral agrees with the numerical average torsion obtained by a simulation of random walks with confinement.
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Chizek, Larry Vernon. "Near-angle scattering and binary optics." Thesis, Monterey, California. Naval Postgraduate School, 1989. http://hdl.handle.net/10945/27158.
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Usta, Umit Y. "Comparison of quaternion and euler angle methods for joint angle animation of human figure models." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1999. http://handle.dtic.mil/100.2/ADA361544.
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Thesis (M.S. in Computer Science) Naval Postgraduate School, March 1999.Thesis advisor(s): Robert B. McGhee, Michael J. Zyda. "March 1999". Includes bibliographical references (p. 201-203). Also available online.
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Ouckama, Ryan. "Comparison of flexible electrogoniometers to a 3D optical tracking system for measurements of ankle angles during level walking and running." Thesis, McGill University, 2008. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=18818.
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Accurate measurement of joint motion is highly desirable for human gait analysis. Marker based optical motion capture is currently a gold standard in human gait studies but limited to a small field of view, exclusively in a laboratory setting. Where quantitative assessment is needed in the unconstrained environments (eg. factory floor, clinical wards), strain-gauge electrogoniometers provide portable operation and simple measurement of joint angles. These modern electrogoniometers have overcome problems associated with prior generations of fixed axis goniometers. The purpose of this study was to examine the kinematics obtained between the optically based 3D system with strain guage based elgons, for the measure of ankle angles. Ten subjects completed 20 barefoot walking and running trials with simultaneous recording from both measurement devices. Data revealed high correlations between devices (r2=0.78-0.97) and relatively small degrees of error (<2.5 degrees) particularly at slower walking speeds. Electrogoniometers may be considered as reliable and accurate devices for use in gait studies.Une mesure juste et fidèle du mouvement des articulations est extrêmement importante pour les différentes études d'analyse de la démarche humaine. À ce jour, la capture optique du mouvement à l'aide de marqueurs est un standard pour les études sur la démarche humaine, mais elle est sujette à des erreurs reliées au mouvement de la peau ou au mauvais placement des marqueurs réfléchissants. Une alternative à cette méthode consiste à utiliser des électrogoniomètres flexibles. Ces derniers sont portables et plus simples d'utilisation, mais ont tendance à provoquer un niveau indésirable de rétroaction. L'objectif de cette étude est d'examiner les différentes caractéristiques de ces deux techniques durant la mesure des angles de la cheville durant le cycle de marche, ce qui permettra de tester la validité des résultats obtenus avec les deux méthodes dans les études sur la démarche humaine. Dix sujets ont complété vingt essais de marche et de course à pieds nus alors que les résultats étaient enregistrés utilisant les deux techniques. Ces résultats présentent de très forte corrélations (R2=0.78-0.97), particulièrement à vitesse de marche, en plus de démontrer des différences non significatives entre les événements spécifiques à la démarche humaine. Les électrogoniomètres peuvent donc être considérés comme des appareils justes et fidèles pour l'étude de la démarche humaine.
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Angel, Thomas Emil. "Spectrophotometric, Mass Spectrometeric and Structural Studies of the Prototypical G Protein Coupled Receptor Rhodopsin." Thesis, Montana State University, 2007. http://etd.lib.montana.edu/etd/2007/angel/AngelT0507.pdf.
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Rhodopsin is the integral membrane protein responsible for black and white vision in low light conditions and is found at high concentration in the mammalian retina. Rhodopsin is a prototypical member of the G protein coupled receptor super family that control much of physiology. Improved understanding of rhodopsin signal transduction and amplification via coupling to the heterotrimeric G protein transducin may reveal conserved activation mechanisms that are relevant to other members of the GPCR super family. Described here are several studies that examine the molecular determinants responsible for heterotrimeric G protein coupling to metarhodopsin II, the active photointermediate of bovine rhodopsin. Employing uv-visible spectroscopy we have investigated the nature of the interaction between the C-terminal tail of transducin and metarhodopsin II. We have provided evidence that suggests the orientation of transducin when it interacts with metarhodopsin II. Mass spectrometry is a powerful technique for characterizing intact and digested proteins. We have optimized mass spectral methods for investigating integral membrane proteins, utilizing rhodopsin as a model system. The mass spectrometric studies provide the foundation for future investigations into agonist and antagonist interactions and the related G protein coupled receptors using molecular crosslinking. Development and validation of new tools for generating structural constraints for conformational states of proteins that are not amiable to more traditional structural determination techniques are described. Antibody imprinting studies on rhodopsin were advanced with the work presented here. The x-ray crystal structure of the anti-rhodopsin antibody K42-41L in complex with a synthetic epitope mimetic peptide is described. These studies led to the generation of a model of the third cytoplasmic loop of the photointermediate metarhodopsin I and constraints on the conformational changes in metarhodopsin II.
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Nivens, Ryan Andrew. "From Here to There: Linear and Angle Measurement." Digital Commons @ East Tennessee State University, 2018. https://dc.etsu.edu/etsu-works/2650.
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Tongbuasirilai, Tanaboon. "Accurate BRDF Modelling for Wide Angle Scattering." Thesis, Linköpings universitet, Medie- och Informationsteknik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-102746.
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In this thesis, a modified BRDF model for wide-angle scattering is presented. The proposed model is developed from empirical observations of several BRDF models. The model is an extention of the classical microfacet models. By replacing the two cosines of elevation angles with functions and exponent parameters, our model is able to give a special characteristic which we have not found in any other BRDF models. The characteristic at wide-angle scattering can be, for example, seen on the polyethylene material. In addition, our proposed model can greatly improve relative error from the reference model. The average relative error improvement is about 20 ercent for a cosine weighted error metric,E1 , and 10 percent for a logarithmic error metric, E 2,. Moreover, we also introduce a new optimization approach for the proposed terms. This approach can do optimization so that our proposed model gives at least an equivalent error to the reference model.
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Cao, Yuan Ph D. Massachusetts Institute of Technology. "Electronic transport in low-angle twisted bilayer graphene." Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/105685.
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Thesis: S.M., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2016.Cataloged from PDF version of thesis.
Includes bibliographical references (pages 47-48).
Graphene is a two-dimensional material with exotic electronic, optical and mechanical properties. By stacking two layers of graphene together with a small rotation angle between them, a superlattice of arbitrarily large size can be formed. The hybridization of the electronic states in the two layers can result in reduced Fermi velocity, van Hove singularities and a gapped band structure. In this work, a novel tear-and-stack technique is developed to reliably produce twisted bilayer graphene with controlled angle, and electronic transport measurements of the resulting high-quality samples are performed and discussed. We discover novel insulating states that purely results from the moiŕe superlattice band structure. The magnetotransport properties of these insulating states are studied and indicate that these states have different structure with those in either graphene or AB-stacked bilayer graphene; it shows a non-monotonous change of Fermi surface area which agrees with theoretical calculations. The results point toward a new pathway for graphene-related physics and material research.
by Yuan Cao.
S.M.
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Bauer, Thomas J. "Maxillary central incisor crown-root relationships in Class I normal occlusions and Class II division 2 malocclusions." Thesis, University of Iowa, 2014. https://ir.uiowa.edu/etd/4572.
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Introduction: The purposes of this study were several. The first was to establish a mean value for the crown-to-root angle, or collum angle (CA), for maxillary central incisors in Class I normal occlusions. The second was to create a new crown-to-root angle based on anatomic points, the labial crown-root angle (LCRA), and correlate it with the CA for Class I normal occlusions and Class II division 2 malocclusions. Third, torque values were measured for maxillary central incisors using these anatomic points, and mean values were calculated for Class I normal occlusions and Class II division 2 malocclusions. Finally, mean values for CA and LCRA were analyzed for Class I normal occlusions and Class II division 2 malocclusions to detect differences between the two groups. Methods: 51 Class I normal samples and 42 Class II division 2 samples who met the inclusion criteria were studied cephalometrically. Relevant landmarks were placed, analyzed for reliability, and recorded for the measurements of interest. Results: The mean CA for Class I normal occlusions was not statistically different from zero (p= .0657). A strong increasing correlation between CA and LCRA was found for all samples (Pearson's correlation coefficient = 0.88, p < .0001). Mean torque values for Class I normal occlusions and Class II division 2 malocclusions were statistically different (3.95±10.85 degrees vs. 12.54±5.82 degrees, p < .0001). The mean CA for Class I normal occlusions and Class II division 2 malocclusions were statistically different (4.29±5.77 degrees vs. 1.78±3.94 degrees, p = .0178). The mean LCRA for Class I normal occlusions and Class II division 2 malocclusions were statistically different (31.60±4.24 degrees vs. 34.84±5.95 degrees, p = .00037). Conclusions: The mean CA in Class I normal occlusions is not statistically different from zero degrees. The LCRA is strongly correlated with the CA in both Class I normal occlusions and Class II division 2 malocclusions. The mean maxillary central incisor torque values for Class I normal occlusions is similar to that found in bracket prescriptions currently offered. Patients with Class II division 2 malocclusion exhibit statistically higher mean CA and LCRA values than patients with Class I ideal occlusion.
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Kennedy, Graeme J. "Static and dynamic aspects of angle perception." Thesis, Glasgow Caledonian University, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.443161.
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Birner, Sabrina Marguerite. "Steep reference angle holography : analysis and applications." Thesis, Massachusetts Institute of Technology, 1989. http://hdl.handle.net/1721.1/71398.
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Boman, Katarina. "Low-angle estimation : Models, methods and bounds." Licentiate thesis, Uppsala universitet, Avdelningen för systemteknik, 2000. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-85998.
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In this work we study the performance of elevation estimators and lower bounds on the estimation error variance for a low angle target in a smooth sea scenario using an array antenna. The article is structured around some key assumptions on multipath knowledge, signal parameterization and noise covariance, giving the reader a framework in which Maximum Likelihood estimators exploiting different á priori information can be found. The crucial factor that determines the estimator accuracy is the multipath modeling, and there are three alternative levels of knowledge that can be used: 1) two unknown target locations 2) the target and its corresponding sea-reflection are related via simple geometry 3) the sea-reflection coefficient is known as a function of grazing angle. A compact expression for the Cramér–Rao lower bound is derived, including all special cases of the key assumptions. We prove that the Cramér–Rao bound is highly dependent on the multipath model, while it is the same for the different signal parameterizations and that it is independent of the noise covariance. However, the Cramér–Rao bound is sometimes too optimistic and not achievable. The tighter Barankin bound is derived to predict the threshold behavior seen at low SNR. At high SNR the Barankin bound coincides with the Cramér–Rao bound. Simulations show that the Maximum Likelihood methods are statistically efficient and achieve the theoretical lower bound on error variance, in case of high enough SNR. The bounds are also useful tools to design an improved array structure that can give better performance than the standard uniform linear array structure. The influence of the number of sensors and the number of snapshots on the error variance is also studied, showing the rate of improvement with more sensors or snapshots. Finally we discuss the use of multiple frequencies, which is mainly a tool for suppressing ambiguities. We show for which signal models it provides improved performance.
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Harris, Jason Marc. "The Angle of Desire and Other Stories." Bowling Green State University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1395068706.
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Bogner, Anthony John. "Interceptor guidance using angle-only measurements and discrete maneuvers." Thesis, Massachusetts Institute of Technology, 1990. http://hdl.handle.net/1721.1/42488.
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Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1990.Title as it appears in the June, 1990 M.I.T. Graduate List: An exoatmospheric interceptor guidance using angle-only measurements and discrete maneuvers.
Includes bibliographical references (leaf 109).
by Anthony John Bogner.
M.S.
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Dahlström, Markus. "Light Angle Influence: Designing an interactive research tool." Thesis, Malmö högskola, Institutionen för konst, kultur och kommunikation (K3), 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-22728.
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Ljusdesign är en viktig faktor i media som t ex spel, film och inredningsdesign. Att tänka i interaktions designs banor är inte alltid prioriterat när man skapar ett rum med ljus. Användarorienterade termer borde vara mer av en standard för designern eller ljussättaren för att uppnå den bästa möjliga upplevelsen för betraktaren när denne åskådar en scen/rum med någon form av ljussättning. Detta arbete kommer att beskriva det onlineverktyg som jag har skapat, designprocessen bakom den samt hur jag använt den för att söka efter människors känslomässiga respons på olika ljusvinklar projicerade mot människor eller objekt. Verktyget består av ett ansikte, fem uppgifter samt en ljuskälla. Ljuskällan rörs fritt runt ansiktet och uppgifterna tolkas helt individuellt av varje användare. Ett exempel på en uppgift är: Designa en djävul! Det finns inga rätt eller fel när användaren designar, det är helt och hållet upp till varje testperson hur de tycker att en djävul ser ut med endast en ljuskälla/ljusvinkel. Resultaten markeras ut på en så kallade ”facemap” för att visualisera statistiken bakom testerna. Resultaten som görs online av användare är analyserade och förklarade hur de används i studien för att försöka skapa ett nytt sätt att tänka inom ljusdesign. Detta med anledning att förbättra ljusdesign i filmer, foto och slutligen spel. Denna forskning samt prototyp kommer även att stödja fotografer och scensättare i deras artistiska skapande.Lighting design is an important factor in media such as games, movies and interior design. Interaction design thinking is not always the priority when designing a space with light. The user oriented terms of thinking should be more of a standard for the designer, enabling them to create the highest possible experience for the beholder when viewing a scene with a light set-up. This paper will explain the online test tool I have created, the design process behind it, and how I used it in the search for peoples emotional responses to different light angles projected onto humans or objects. The tool consists of a single face, five tasks and one light source. The light source is moved freely around the face and the tasks given are interpreted individually by each user. An example of one task is: Design a devil! There is no right or wrong when designing, it is completely up to each test person how they think a devil look like with only one light source/light angle. The results are mapped out on a “Facemap” to visualize the statistic outcome. The results from user test done with my tool online are analysed and explained how they are used in a study trying to create a new way of thinking when it comes to lighting design. All with the purpose of enhancing lighting design in movies, still images and eventually games. This research and prototype will also support photographers and stage coordinators when creating their sets.
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Castrillo, Pablo Ignacio. "Angel Of War." Digital Commons at Loyola Marymount University and Loyola Law School, 2013. https://digitalcommons.lmu.edu/etd/9.
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Rodriguez, Emily M. "Angel Financing: Matching Start-Up Firms with Angel Investors." Scholarship @ Claremont, 2011. http://scholarship.claremont.edu/cmc_theses/136.
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The hardest time to receive financing for a venture is at its earliest stage. These ventures are among the riskiest investments for an investor, which creates a gap in financing that is often bridged through a source of funding called Angel Financing. Angel investors are one of the best providers of early stage funding. This thesis will explain what angel investing is, how they work, and what angels look for. This information will help entrepreneurs be better equipped to find an angel investor for their venture.
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Leibly, Frank J. (Frank Joseph). "Measurement and digitization of phase angle modulated sensor data." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/37753.
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Liptay, Thomas John 1977. "Cavity filtered injection locking for large angle atomic interferometry." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/86793.
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Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science; and, (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, 2000.Includes bibliographical references (p. 54-55).
by Thomas John Liptay.
M.Eng.
S.B.
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Jami, Iqbal. "Estimation of angle of arrival and angle spread using a modified MUSIC algorithm and Kalman filtering for smart antenna applications." Thesis, Cranfield University, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.396498.
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De, Waal Andre Stephanus. "Comparison of an intra-oral approach using a contra-angle hand piece with the transbuccal technique for mandibular angle fracture repair." Thesis, University of the Western Cape, 2010. http://hdl.handle.net/11394/2540.
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Magister Chirurgiae Dentium - MChDPurpose: To compare the intra-oral approach using a contra-angled hand piece with the standard transbuccal approach in the treatment of mandibular angle fractures. Patients and Methods: Thirty patients with isolated fractures of the mandibular angle were treated by open reduction and internal fixation using one three-dimensional “strut” or “geometric” Synthes® angle plate. Patients were selected randomly for placement of two-millimeter self-threading screws, either through the standard transbuccal technique or with an intra-oral approach using a contra-angle hand piece. None of the patients were placed into post-surgical maxillomandibular fixation (MMF). Swelling and pain were measured pre-operatively and again twenty-four hours after surgery. The actual cutting time from first incision to placement of last suture was documented, as well as the perception of difficulty of the specific case by a single operating surgeon. Results: No statistically significant difference in perception of pain was experienced between the two groups of patients during the first twenty-four hours after surgery. There was also no statistically relevant difference in cutting time between the two placement techniques. A small statistically relevant difference (p-value = 0.089) was found in the amount of swelling post-operatively between the two groups, with more swelling in the control group. Conclusion: The use of a contra-angle hand piece to place screws in the compression band area in a mandible angle fracture is an acceptable alternative to the transbuccal approach.
South Africa
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Meng, Guanjie, and Shabnam Darman. "Label and Barcode Detection in Wide Angle Image." Thesis, Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-23979.
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Labels are used for managing warehouse environments by collecting information from existing items on shelves and racks. Labels enable description and identification of items accurately in a short time. Although lot of research have been done in the field of barcode detection, the present methods for detection are applicable at a short distance from the camera and with a clear background. Therefore, label detection from captured images is challenging especially with a large and complex background. Once a label is detected, it is ready for next process of recognition, to read out the stored information in texts and barcodes. In this thesis, we compared methods from previous works and implemented the most suitable one for detecting one-dimensional (1D) barcodes available on the captured images by standard lens. We created a dataset for label detection with an assumption on background color and we continued processing by K-means clustering and classification. After localizing label regions, a projection for determining a different candidate area is done. We have worked on two types of barcodes, one-dimensional (1D) and Data Matrix as a two-dimensional (2D) barcode. The results show a good performance of the system in terms of images, which are the most important issue in terms of industrial detection.
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Foss, Stig-Kyrre. "Depth consistent pp and ps seismic angle tomography." Doctoral thesis, Norwegian University of Science and Technology, Department of Mathematical Sciences, 2004. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-318.
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This thesis addressed the problem of finding background models yielding depth consistent migrated PP and PS images, i.e. geologically equivalent reflectors should be imaged at the same depth in the two images. The tomographic approach in search of a background medium, is performed as a combination of migration velocity analysis by differential semblance in angle and map migration. A practical strategy for obtaining estimates of all parameter values in a transversely isotropic medium with a known symmetry axis is presented. The approach combines the search of a background medium yielding optimum focusing ability by differential semblance and the matching of PP and PS key reflectors in depth by means of map migration. This can also be used to match the imaged reflectors with known depths e.g. from well markers.
For the purpose of fast and computationally inexpensive imaging and tomography in angle, a complete review and analysis for the 2.5-D case is performed. The theory is also extended to anisotropic media under necessary and sufficient assumptions. An analysis is performed with regards to parameter issues in 2.5-D in anisotropic media. All inversion and migration results are derived in the natural coordinate system, namely scattering/reflection angle at the imaging point by means of the generalized Radon transform.
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Colson, Tobias A., and tobiascolson@gmail com. "Large Angle Plasmon Scattering in Metals and Ceramics." RMIT University. Applied Sciences, 2007. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20090212.143048.
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This investigation is primarily concerned with the low loss, or plasmon region of an electron energy loss spectrum. Specifically, why these spectra have the shape and form that they do; what the significance of the material is in determining the shape and form of these spectra; what can be done with plasmon excited electrons; and how all of this fits in with the current theory of plasmon excitation. In particular, the concept of plasmon scattering being an energy transfer process of a coupled wave in the material is explored. This gives rise to slightly different explanations of the plasmon scattering process to the status quo. Multiple scattering is typically pictured as a combination of separate and independent, elastic and inelastic scattering events interactively contributing to a final exit wave function. However, this investigation explores the idea of the elastic and inelastic components being a coupled event, and what the consequences of this idea are from a conceptual point of view. The energy transfer process itself, does not deviate from a virtual particle exchange description that is consistent with the standard model. However, the two significant points made throughout the chapters are one: that the elastic and inelastic scattering events are coupled rather than separate, and two: that each succussive higher order scattering event in multiple scattering scenarios, are dependant and connecte d rather than independent.
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Liu, Chang Materials Science & Engineering Faculty of Science UNSW. "Bulk density and angle of repose of coal." Awarded by:University of New South Wales. Materials Science & Engineering, 2007. http://handle.unsw.edu.au/1959.4/40495.
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This thesis reports a study on the effects of size distribution, moisture content and oil addition on bulk density and angle of repose of coal. The experimental work includes four stages. The first stage is to develop reliable experimental techniques. The results confirm that ASTM cubic foot test is reliable for measurement of bulk density and angle of repose if properly operated, although the latter is better measured in a piling process. Stages 2 and 3 are to investigate the effects of size distribution by using -3.55mm% for stage 2 and mean size do.s for stage 3, water content and oil addition on bulk density and angle of repose of coal. For each of them, empirical equations are formulated to predict bulk density and angle of repose. The results indicate that the fraction -3.55mm cutting size in stage 2 does not affect bulk density significantly, while the increase of do.s decreases bulk density to a minimum and then increases. Particle size distribution does not affect angle of repose much. The increase of moisture content decreases bulk density and increases angle of repose significantly. The increase of oil addition increases bulk density while decreases angle of repose significantly. The correlation between bulk density and angle of repose can also be observed: the higher bulk density, the lower angle of repose. There are other variables affecting bulk density and angle of repose. They include oil type, absorption time discharging height and external loading. Their effects on bulk density and angle of repose are quantified in stage 4. The results suggest that, a higher discharging position or larger external loading increase bulk density significantly. Angle of repose decreases when increase the height of discharging position. Diesel oil performed better than waste oil addition in terms of bulk density enhancement. For most of the cases examined, bulk density and angle of repose become stable after ~24 hours oil absorption time.
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Thimmapuram, Vinod-Kumar. "FINITE ELEMENT MODELING AND STUDY OF ANGLE CONNECTIONS." University of Cincinnati / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1318878130.
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Roenker, Andrew T. "Testing of Torque-and-Angle High Strength Fasteners." University of Cincinnati / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1490701582262578.
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Rousseau, Carl Q. "Stresses and deformations in angle-ply composite tubes." Thesis, Virginia Polytechnic Institute and State University, 1987. http://hdl.handle.net/10919/51901.
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The objective of this study was to investigate, both experimentally and analytically, the stresses and deformations in angle-ply composite tubes subjected to axisymmetric thermal loading. For the theoretical portion, a generalized plane strain elasticity analysis was developed. The analysis included mechanical and thermal loading and temperature-dependent material properties. Using the elasticity analysis and a temperature range of 116 K to 450 K, stress levels were found to be high for the specific designs considered, compared to material failure levels. In addition, the use of temperature-dependent material properties was found to have a significant effect on the predicted stresses and deformations. The elasticity analysis was also used to study the effect of including a thin metallic coating on a graphite-epoxy tube. The stresses in the coatings were found to be quite high, exceeding the yield stress of aluminum. An important finding in the analytical studies was the fact that even tubes with a balanced-symmetric lamination sequence exhibited shear deformation or twist. The radial location of an off-axis ply was found to influence its effect on the overall torsional tube response. For the experimental portion, an apparatus was developed to measure torsional and axial response in the temperature range of 140 K to 360 K. Eighteen specimens were tested, combining three material systems, eight lamination sequences, and three off-axis ply orientation angles. For the twist response, agreement between analysis and experiment was found to be good. The axial response of the tubes tested was found to be greater than predicted by a factor of three. As a result of the study, it is recommended that the thermally-induced axial deformations be investigated further, both experimentally and analytically.Master of Science
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Hancock, Shirley A. "Structure and function in primary open angle glaucoma." Thesis, Aston University, 2000. http://publications.aston.ac.uk/14555/.
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The study utilised a Normal group, an Ocular Hypertensive (OHT) group and a Primary Open Angle Glaucoma (POAG) group to investigate two aspects. Firstly, the within- and between-visit variability for stereometric measurements of the optic nerve head (ONH) using the Heidelberg Retina Tomograph (HRT); retinal nerve fibre layer (RNFL) thickness using the HRT and using optical coherence tomography with the Optical Coherence Tomography Scanner (OCT); the visual field using white-on-white (W-W), short-wavelength (SWAP) and Frequency Doubling perimetry (FDT); and retinal haemodynamics using the Heidelberg Retinal Flowmeter (HRF). Secondly, the association demonstrated between some of the derived variables. The within- and between-visit variability for stereometric measurements of the entire ONH and the between-visit variability for sectoral measurements were similar for Normals and OHTs but greater for POAGs. The within-visit variability of the visual field pointwise parameters for SWAP were greater than for W-W and FDT particularly with increase in eccentricity and for the OHT group. The between-visit variability increased with increase in defect depth for the POAG group, across all types of perimetry. The MS was greater, the MD and PSD smaller and the examination duration shorter in FDT compared to W-W and SWAP across all groups. The within-visit variability was less than the between-visit variability for the OCT circumferential and sector RNFL thickness using the 1.5R, 2.0R and the fixed 1.73mm circular scan radii, across the three groups. The variability increased with decrease in the RNFL thickness, and was least for the 2.0R scan radius.
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Migdal, Clive. "Primary therapy for chronic open-angle glaucoma : the role of laser, medicine and surgery." Doctoral thesis, University of Cape Town, 1990. http://hdl.handle.net/11427/25679.
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Sobieski, Julian Witold. "Assessing steric bulk of protecting groups via a computational determination of exact cone angle and exact solid cone angle." Kent State University Honors College / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ksuhonors1528385706530151.
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Smadi, Mithkal Moh'd 1960. "TRENCH ETCHING IN SILICON WITH A CONTROLLABLE SIDEWALL ANGLE (TEMPERATURE)." Thesis, The University of Arizona, 1986. http://hdl.handle.net/10150/276593.
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McEvoy, Erica Lynn 1981. "Determining the jet opening angle of cosmic gamma-ray bursts." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/33943.
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Magina, Sandra Maria Pinto. "Investigating the factors which influence the child's conception of angle." Thesis, University College London (University of London), 1994. http://discovery.ucl.ac.uk/10021527/.
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The aim of the present study is to investigate the factors which influence the child's understanding of angle. Fifty-four students aged from 6 to 14, were set 92 activities to solve in three separate sections. The activities were elaborated according to six interwoven variables: (a) activities in static and dynamic perspectives carried out under (b) three different representational systems: oral (everyday life model), written (paper and pencil model), and bodysyntonic (Logo model). These were inserted in three situations (c), rotation, navigation and comparison, using (d) different materials. The children were asked (e) to perform an action or to recognise differences and similarities between angles, followed by an explanation, or description of what they had done. All activities involved (f) different sizes of angle. The findings were submitted to both quantitative and posteriori qualitative analysis. Cross-sectionally by age, the data indicate a strong trend of improved performance with age. This points to a developmental effect, but the school's influence has to be taken into account. The results suggest that the child's acquisition of the conception of angle has a dynamic perspective as its starting-point. In particular, the children performed better within activities which involved rotation. This does not imply that every child used the dynamic perspective of angle consistently across all tasks. In fact the choice of perspective frequently changedaccording to the meaning of the situation, which could sometimes be depended on cultural influences. This was particularly apparent in the watch arena, the situation which the children were most successful. In a comparison of representational systems, the best performances were achieved in activities on Logo, while activities conducted with paper & pencil proved to be the most difficult. Performance was also enhanced in tasks which required action by the children. These findings indicate that there exist various factors influencing a child's understanding of angle, and these factors are close interrelated.
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Chapuis, Bérengère. "Les symboliques de l’ange dans l’art et la littérature de 1850 à 1950." Thesis, Paris 4, 2010. http://www.theses.fr/2010PA040154.
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L’ange n’a jamais été aussi présent qu’à l’heure de la modernité, c’est-à-dire à l’époque où le religieux, en son expression, sa forme et sa substance, ses objets, se trouvait remis en question par l’intense réflexion philosophique et par les découvertes scientifiques et techniques issues des Lumières. C’est ce constat fondé sur l’omniprésence des anges tant dans l’art que dans la littérature du dix-neuvième et du vingtième siècles qui nous a conduit à nous poser une question simple : de quoi l’ange fait-il signe ? Que symbolise-t-il ? Quel sens donner à cette présence ?Nous avons décidé, pour le savoir, de remonter aux sources de l’ange afin de mettre au jour les fondements de ce qui, de toute évidence, s’affirme comme l’un des mythes les plus importants de notre imaginaire contemporain. Nous avons également décidé de montrer comment ce passage d’une figure biblique à un mythe profane avait été rendu possible et quels mécanismes cette métamorphose avait empruntés ;nous avons aussi cherché à savoir quels enjeux ce processus mettait en jeu.Cette étude se propose d’étudier les représentations des anges dans l’art et la littérature de 1850 à 1950 afin de découvrir comment l’on passe d’une figure traditionnelle à un véritable mythe moderne. En quoi les représentations modernes de l’ange témoignent-elles des nouveaux rapports qui se tissent au divin ? Il s’agit ensuite d’étudier ses deux symboliques majeures : celle de l’ange inspirateur et celle de l’ange gardien, en mettant au jour les procédés qui permettent à l’ange de devenir un mythe personnel de l’individu et du créateur en particulierThe angel was never as present as during the modernist era, that is at a time when thereligious figure, in its expression, its form, and even in its substance, its objects, waschallenged by the intense philosophical reflection and by the scientific and technicaldiscoveries stemming from the Enlightenment era. It is this acknowledgement basedon an omnipresence of angels, in nineteenth and twentieth art and literature alike,which led us to ask a simple question – what is the angel a sign of? What does itsymbolize? What meaning may be given its large presence?We have decided, to understand it, to get back to the sources of the angel in order toshed light onto the foundations of that which, quite obviously, establishes itself asone of the most important myths in the present-day imagination. We have alsodecided to show how the mutation from a biblical figure to a profane myth hadmanaged to happen and what were the mechanisms through which thismetamorphosis had taken place; we have also tried to know what was at stake in thisprocess.This study proposes to examine the representations of angels in art and literaturefrom 1850 to 1950 in order to discover how these traditional figures came to becomemodern myths. How can their contemporary representations testify of a newrelationship with the divine ? We'll try to answer this question by studying two majorsymbolics - the inspiring angel and the guardian angel - and by revealing the processin which the angel becomes a personal myth of the individual and especially of thecreator