Dissertations / Theses on the topic 'Length measurement'
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Tompkins, Michael. "Automated Method For Fiber Length Measurement." NCSU, 2006. http://www.lib.ncsu.edu/theses/available/etd-05222006-130435/.
Full textIkiz, Yuksel. "Fiber Length Measurement by Image Processing." NCSU, 2000. http://www.lib.ncsu.edu/theses/available/etd-20000809-225316.
Full textIKIZ, YUKSEL. Fiber Length Measurement by Image Processing. (Under the direction of Dr. Jon P. Rust.) This research studied the accuracy and feasibility of cotton fiber length measurement by image processing as an alternative to existing systems. Current systems have some weaknesses especially in Short Fiber Content (SFC) determination, which is becoming an important length parameter in industry. Seventy-two treatments of five factors were analyzed for length and time measurements by our own computer program. The factors are: Sample preparation (without fiber crossover and with fiber crossover), lighting (backlighting and frontlighting), resolution (37-micron, 57-micron, 106-micron, and 185-micron), preprocessing (4-neighborhood and 8-neighborhood), and processing (outlining, thinning, and adding broken skeletons). The best results in terms of accuracy, precision and analysis time for images without fiber crossovers were: 106-micron resolution with frontlighting using an 8-neighborhood thresholding algorithm and using an outline algorithm for length determination. With fiber crossovers, 57-micron resolution with backlighting using an 8-neighborhood thresholding algorithm and using a thinning algorithm combined with an adding algorithm for combining broken skeletons. Using the above conditions, 1775 area can be analyzed using our current equipment in 15 seconds. In the case of images with crossovers, only 117 can be analyzed in 15 seconds. This research demonstrates that successful sample preparation without fiber crossovers would create the best fiber length measurement technique, however with fiber crossovers the system efficiency has been proven as well.
Hodgson, David Zhuang. "Residual stress measurement across different length scales." Thesis, University of Bristol, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.544354.
Full textClay, G. A. "Automatic fibre length measurement by image analysis." Thesis, University of Manchester, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.305598.
Full textBallard, Norman. "Electrode length measurement in electric arc furnaces." Master's thesis, University of Cape Town, 1995. http://hdl.handle.net/11427/18232.
Full textWilcox, Eva. "Novel Neutron Detector for n-n Scattering Length Measurement." Diss., CLICK HERE for online access, 2005. http://contentdm.lib.byu.edu/ETD/image/etd900.pdf.
Full textLove, Peter. "In vivo sarcomere length measurement and total body irradiation." Thesis, University of Canterbury. Physics, 1996. http://hdl.handle.net/10092/8116.
Full textSheikh, Zahoor Ahmad. "Measurement of the coherence length of atomic two-photon radiation." Thesis, University of Stirling, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.359253.
Full textWeale, Cecil Jack. "Investigating the association between Leucocyte Telomere length and glucose intolerance." Thesis, Cape Peninsula University of Technology, 2017. http://hdl.handle.net/20.500.11838/2722.
Full textBackground: Telomeres are DNA-proteins situated at the ends of linear chromosomes, responsible for genome stabilization. A link has been previously described between leucocyte telomere length (LTL) and age-related inflammatory disorders such as atherosclerosis, rheumatoid arthritis and cancer. Since diabetes mellitus has been described as a chronic inflammatory condition, it has been hypothesized that there is significant LTL shortening in individuals with dysglycaemia. Aim: To investigate leucocyte telomere length in patients with pre-diabetes, newly diagnosed, known diabetics on treatment and to compare the results to normoglycaemic individuals. Methods: A total of 205 eligible subjects (78% women) median age 56 years, from the Bellville-South community were followed-up between 2008 and 2011. Baseline and follow-up data collections included glucose tolerance status, anthropometric, blood pressure, lipids, insulin, γ-glutamyl transferase, cotinine, and HbA1c. In all participants, telomere length was measured using the absolute telomere q-PCR method performed on a Bio-Rad MiniOpticon Detector. Results: Although there was a change in individuals’ glycaemic status over the 3 years, no significant differences were observed in LTL across glycaemic status: (Baseline p = 0.7618, 3 Year Follow-up p = 0.2204). However, in a multiple regression model, adjusted for age and gender, LTL was negatively associated with age and GGT, and positively associated with high density lipoproteins (HDL) (all p < 0.05). Discussion and conclusion: This research study was the first longitudinal study of LTL in Africans. We show that LTL shortening is not evident within three years, nor is it associated with glycaemia. Our findings also corroborate previous notions associating LTL with age. The lack of association between LTL and glycaemia has been previously reported, however further studies are required using larger sample and broader BMI spread.
Gedela, Naga Venkata Praveen babu. "MEASUREMENT AND ITS HISTORICAL CONTEXT." Kent State University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=kent1226037175.
Full textScotti, Duane Michael. "Iliotibial Band Length and Patellofemoral Pain Syndrome: Relationship Between Two Measurement Techniques." Diss., NSUWorks, 2017. https://nsuworks.nova.edu/hpd_pt_stuetd/60.
Full textBrockhurst, Veronica. "Development of novel DNA-based methods for the measurement of length polymorphisms (microsatellites)." Thesis, Queensland University of Technology, 2001.
Find full textWu, Lan. "IMPROVED VEHICLE LENGTH MEASUREMENT AND CLASSIFICATION FROM FREEWAY DUAL-LOOP DETECTORS IN CONGESTED TRAFFIC." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1387558066.
Full textMcPhail, Diane. "Area : the big cover-up." Thesis, View thesis, 2007. http://handle.uws.edu.au:8081/1959.7/27435.
Full textPratihar, Sumit. "Residual stress measurement on different length scales using neutron and synchrotron X-ray diffraction." Thesis, Open University, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.439239.
Full textReeder, D. Benjamin (Davis Benjamin) 1966. "Acoustic scattering by axisymmertic finite-length bodies with application to fish : measurement and modeling." Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/29252.
Full textIncludes bibliographical references (leaves 140-148).
This thesis investigates the complexities of acoustic scattering by finite bodies in general and by fish in particular through the development of an advanced acoustic scattering model and detailed laboratory acoustic measurements. A general acoustic scattering model is developed that is accurate and numerically efficient for a wide range of frequencies, angles of orientation, irregular axisymmetric shapes and boundary conditions. The model presented is an extension of a two-dimensional conformal mapping approach to scattering by irregular, finite-length bodies of revolution. An extensive series of broadband acoustic backscattering measurements has been conducted involving alewife fish (Alosa pseudoharengus), which are morphologically similar to the Atlantic herring (Clupea harengus). A greater-than-octave bandwidth (40-95 kHz), shaped, linearly swept, frequency modulated signal was used to insonify live, adult alewife that were tethered while being rotated in 1-degree increments over all angles of orientation in two planes of rotation (lateral and dorsal/ventral). Spectral analysis correlates frequency dependencies to morphology and orientation. Pulse compression processing temporally resolves multiple returns from each individual which show good correlation with size and orientation, and demonstrate that there exists more than one significant scattering feature in the animal.
(cont.) Imaging technologies used to exactly measure the morphology of the scattering features of fish include very high-resolution Phase Contrast X-rays (PCX) and Computerized Tomography (CT) scans, which are used for morphological evaluation and incorporation into the scattering model. Studies such as this one, which combine scattering models with high-resolution morphological information and high-quality laboratory data, are crucial to the quantitative use of acoustics in the ocean.
by D. Benjamin Reeder.
Ph.D.
Langrock, Stefanie. "Measurement of the Rayleigh scattering length and background contributions during early data taking phases at SNO+." Thesis, Queen Mary, University of London, 2017. http://qmro.qmul.ac.uk/xmlui/handle/123456789/24647.
Full textMcPhail, Diane. "Area the big cover-up /." View thesis, 2007. http://handle.uws.edu.au:8081/1959.7/27435.
Full text"A thesis submitted to the University of Western Sydney, College of Arts, School of Education in fulfilment of the requirements for the degree of Doctor of Philosophy." Includes bibliography.
Roberge, Douglas M. "Experimental crack length measurement under variable temperature using a thin film AC potential difference technique." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq23477.pdf.
Full textSosale, Guruprasad. "Measurement and analysis of surface topography over multiple length scales: application to titanium bone implants." Thesis, McGill University, 2007. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=18433.
Full textLa performance des implants osseux dépend de façon critique de l'interaction entre la surface de l'implant et le tissu osseux environment. Le but de cette thèse est de développer une méthodologie fiable pour mesurer et analyser la topographie de surfaces non périodiques à différentes échelles. Ainsi, deux techniques de mesure extrêmement utilisées, la microscopie à force atomique et l'interférométrie à lumière blanche ont été comparées et confrontées. Un programme développé sur le logiciel MATLAB a été conçu pour analyser les images obtenues par ses deux instruments et en extraire quatorze différents paramètres topographiques statistiques. Les erreurs associées à la mesure et à l'analyse d'image ont été ensuite identifiées et des recommandations ont été suggérées pour minimiser leurs effets. Cette méthodologie a été ensuite appliquée pour mesurer les topographies de deux implants en titane communément utilisés. Il apparaît que ces deux surfaces ont une moyenne quadratique similaire pour la rugosité, mais présentent néanmoins des réponses biologiques différentes. Dans cette recherche, il a été démontré que les deux surfaces présentent, en plus, plusieurs différences pour d'autres paramètres topographiques, notamment de façon significative, pour l'inclinaison des surfaces, la courbure des pics et l'aire interraciale développée. Ces différences dépendent fortement d'un facteur d'échelle, et forment la base pour d'autres études afin de développer des relations quantitatives entre la topologie de la surface et les réponses biologiques associées.
Roe, John Andrew. "How important is length? : mechanical testing and measurement of a cemented, polished, tapered femoral implant." Thesis, Queensland University of Technology, 2011. https://eprints.qut.edu.au/53200/1/John_Roe_Thesis.pdf.
Full textRydefalk, Staffan. "Particle Measurements Using Fluctuations in the Regular Transmittance of Light Through a Particle Dispersion : Concentration and Particles size - Theory, Measurement Principles and Applications for Pulp and Paper Production." Doctoral thesis, KTH, Industriell produktion, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-10639.
Full textQC 20100806
Masetti, Lucia [Verfasser]. "Measurement of the Ke4 form factors and of the pi-pi scattering length alpha00 / Lucia Masetti." Aachen : Shaker, 2007. http://d-nb.info/1170527108/34.
Full textRozler, Michael. "Development of a scanning tunneling potentiometry system for measurement of electronic transport at short length scales /." May be available electronically:, 2009. http://proquest.umi.com/login?COPT=REJTPTU1MTUmSU5UPTAmVkVSPTI=&clientId=12498.
Full textOng, Chiou Perng. "Measurement of minority charge carrier diffusion length in Gallium Nitride nanowires using Electron Beam InducedCurrent (EBIC)." Thesis, Monterey, California : Naval Postgraduate School, 2009. http://edocs.nps.edu/npspubs/scholarly/theses/2009/Dec/09Dec%5FOng_Chiou%20Perng.pdf.
Full textThesis Advisor: Haegel, Nacy M. Second Reader: Karunasiri, Gamani. "December 2009." Description based on title screen as viewed on January 26, 2010. Author(s) subject terms: Minority charge carrier, diffusion length, GaN, nanowires, EBIC. Includes bibliographical references (p. 71-73). Also available in print.
Saliba, Michael Angelo. "A precision measurement of the neutron-neutron scattering length from the reaction [pi]-d -> [gamma] nn." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape15/PQDD_0015/NQ27236.pdf.
Full textIshijima, Ken. "Length of the Eustachian tube and its postnatal development : Computer-aided three-dimensional reconstruction and measurement study." Kyoto University, 2001. http://hdl.handle.net/2433/150190.
Full textKyoto University (京都大学)
0048
新制・論文博士
博士(医学)
乙第10768号
論医博第1757号
新制||医||781(附属図書館)
UT51-2001-N240
(主査)教授 塩田 浩平, 教授 橋本 信夫, 教授 伊藤 壽一
学位規則第4条第2項該当
Galles, Lindsay Lee Ann. "Measurement of Telomere Length in Rat Endothelial Cells: Modification of a Technique Used in Human Mononuclear Cells." Thesis, The University of Arizona, 2010. http://hdl.handle.net/10150/146251.
Full textGibson, Millan-John. "Fibre Length Distribution and Dispersion during the Injection Moulding Process: An experimental study evaluating fibre length attrition and dispersion during processing of long glass fibre reinforced polymer composites in injection moulding including an evaluation of long glass fibre measurement techniques." Thesis, University of Bradford, 2018. http://hdl.handle.net/10454/17360.
Full textDuncan, Warwick. "The measurement and modelling of the intracrystalline diffusion of cyclohexane in ZSM-5 using zero length column chromatography." Doctoral thesis, University of Cape Town, 2001. http://hdl.handle.net/11427/8743.
Full textZeolites are important solid acid catalysts largely because of their microporous nature giving them strong shape selective properties. This shape selectivity may be improved by depositing an inert (e. g. silaceous) layer on the surface of the catalyst crystals, which inertises non-shape selective surface acid sites and increases diffusional transport resistances. This thesis presents an investigation, using the zero length column (ZLC) method, into changes in the diffusional properties of cyclohexane in ZSM-5 that has had tetraethoxysilane deposited on the surface in the liquid phase. Theoretical analyses of the ZLC technique and its use in a detailed study of cyclohexane in unmodified ZSM-5 were performed in order to prove the reliability of the technique and measure baseline behaviour of the selected system. The ZLC method is a chromatographic technique for the measurement of diffusion coefficients in porous sorbents. Originally developed for gaseous hydrocarbon / zeolite powder systems, it has been experimentally extended to the measurement of liquid sorbate systems, macroporous zeolite pellets and resins and the measurement of self-diffusion through tracer exchange. The technique is robust against the intrusion of external heat and mass transfer effects by the use of relatively high flow rates and small catalyst samples, Analysis of the desorption curves is simple: the slope of the linear (on semilogarthmic axes) long time region gives the diffusional time constant. This so-called 'long time' analysis gives an accurate result for the diilusional time constant.
Coholic, Alexander, and Fanny Hellberg. "Reliability and precision of root length measurements in cone beam CT images: a study of adolescents." Thesis, Malmö universitet, Odontologiska fakulteten (OD), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-19758.
Full textBackground: An orthodontic treatment may cause root resorption of varying extent on the involved teeth. The resulting root resorption can be measured in cone beam computed tomography (CBCT) images. However, measurement results may vary among different raters because of measurement errors, affecting the reliability of the method of measurement. Objectives: To evaluate reliability and precision of measurement of root length following orthodontic treatment in CBCT images. Methods: Ten adolescents participating in a trial of orthodontic treatment were examined with CBCT of both jaws. Five raters measured root length in preselected CBCT images of 100 roots from 90 teeth. The measurements were later repeated by the same raters. Reliability was expressed as intra-class correlation coefficient (ICC 2.1). Measurement error was calculated with Dahlberg’s formula and standard moment of measure variance estimator (MME)formula. Results: The inter-rater reliability for all raters had an ICC-value of 0,88 for the first measurement and an ICC-value of 0,87 for the second measurement. The intra-rater reliability for all raters had an ICC-value between 0,84-0,92. Measurement error calculated with the Dahlberg's formula ranged between 0,44-0,64 mm for all teeth for all raters. The largest difference of measurement error between raters was observed in canines, 0,44-1,15 mm. The smallest measurement error was observed in molars, 0,42-0,53 mm. Measurement errors calculated by the MME formula showed similar results. Conclusion: Root length measurements in CBCT-images show high intra- and inter rater reliability. The precision varies between raters and tooth groups but measurements of severe root resorptions (>2 mm) are reliable with this method. The reliability and precision of a method should always be considered when conducting measurement studies. CBCT could be considered a reliable method for measurement of root resorption following orthodontic treatment with different orthodontic appliances.
Marshall, L. "Year 7 students' understanding of the relationship between area and perimeter." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 1997. https://ro.ecu.edu.au/theses/900.
Full textPagliazzi, Marco. "Time domain, near-infrared diffuse optical methods for path length resolved, non-invasive measurement of deep-tissue blood flow." Doctoral thesis, Universitat Politècnica de Catalunya, 2019. http://hdl.handle.net/10803/667682.
Full textLa medición no invasiva y, a menudo, continua de la hemodinámica del cuerpo, y para los propósitos principales de esta tesis, del cerebro, es conveniente porque tanto los valores instantáneos como sus variaciones en el tiempo se adaptan constantemente a las condiciones que afectan el cuerpo humano y su entorno. Estas suelen alterarse en situaciones patológicas o como respuesta a una mayor función. Es deseable que estas mediciones sean continuas, confiables, mínimamente invasivas y relativamente asequibles. En los últimos años, las técnicas ópticas que, mediante el uso de luz difusa para medir los tejidos en profundidad (hasta unos pocos centímetros) mediante niveles de intensidad que son seguros para la piel, combinan las características arriba mencionadas, se han utilizado cada vez más tanto en entornos clínicos como de investigación. Sin embargo, al día de hoy hay, por un lado, la necesidad de ampliar el número y el ámbito de los estudios translacionales y, por el otro, de suplir a las deficiencias como por ejemplo la contaminación de volúmenes de tejido no deseados (efectos de volumen parcial). Otro objetivo importante es aumentar la profundidad de penetración de la luz sin afectar la naturaleza no invasiva de la óptica difusa. Mi doctorado está destinado a mejorar varios aspectos de este problema; (i) el desarrollo de nuevos métodos más avanzados, es decir, el método resuelto en el tiempo/trayectoria de los fotones, para mejorar la diferenciación entre los tejidos superficiales y profundos, (ii) la exploración de nuevas áreas de aplicación, es decir, para caracterizar el estado microvascular de los huesos, para estudiar la respuesta funcional del cerebro en los niños, y (iii) para mejorar el control de calidad de los sistemas, es decir, mediante la introducción de un phantom dinámico de larga vida útil. En orden conceptual, primero voy a introducir estándares de referencia de larga vida útil para la espectroscopia de correlación difusa (DCS). En segundo lugar, voy a describir el uso de un sistema híbrido espectroscopia tiempo-resuelta (TRS) con DCS ya existente para monitorizar los cambios que algunas condiciones patológicas, en este caso la osteoporosis y la infección por el virus de la inmunodeficiencia humana, pueden comportar para muchos aspectos del tejido óseo humano que actualmente no se pueden medir con facilidad (es decir, se van evaluado de forma invasiva) mediante técnicas convencionales. En tercer lugar, voy a describir el desarrollo de una novedosa técnica óptica en el dominio temporal que combina íntimamente, introduciendo muchos avances previamente no cumplidos, TRS y DCS. Por primera vez pude producir un dispositivo y un protocolo tiempo-resueltos para medir el flujo de la sangre en la cabeza y en los músculos de seres humanos sanos. Por último, en esta tesis voy a describir un dispositivo y un método que he usado para monitorear los cambios en el flujo sanguíneo como marcadores de activación del cerebro debida a estímulos visivos en bebés entre tres y cinco meses de edad. En general, este trabajo amplia los limites de la tecnología que hace uso de la luz difusa para monitorizar, de forma mínimamente invasiva, continua y confiable los marcadores endógenos de procesos patológicos y fisiológicos en el cuerpo humano.
Walker, Eric C. "The importance of using SEM when studying multiple dimensions of marital satisfaction : measurement invariance across relationship length and gender /." Diss., CLICK HERE for online access, 2009. http://contentdm.lib.byu.edu/ETD/image/etd3008.pdf.
Full textPrieskorn, Zachary Ryan. "Design and testing of a NITPC X-ray polarimeter with applications for the measurement of SGR burst polarization." Diss., University of Iowa, 2011. https://ir.uiowa.edu/etd/1061.
Full textAslan, Gokhan. "Cepstral Deconvolution Method For Measurement Of Absorption And Scattering Coefficients Of Materials." Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/3/12608021/index.pdf.
Full textAbdelnaser, Amany Abdelaty Mohammed [Verfasser], and Peter [Akademischer Betreuer] Lemmens. "Development of a Double-Ended Gauge Block Interferometer for Measurement of the Absolute Length / Amany Abdelaty Mohammed Abdelnaser ; Betreuer: Peter Lemmens." Braunschweig : Technische Universität Braunschweig, 2012. http://d-nb.info/1175824593/34.
Full textTaulbee, Timothy Dale. "Measurement and model prediction of proton-recoil track length distributions in NTA film dosimeters for neutron energy spectroscopy and retrospective dose assessment." Cincinnati, Ohio : University of Cincinnati, 2009. http://www.ohiolink.edu/etd/view.cgi?acc_num=ucin1235764236.
Full textAdvisors: Henry Spitz PhD (Committee Chair), Bingjing Su PhD (Committee Member), John Christenson PhD (Committee Member). Title from electronic thesis title page (viewed May 1, 2009). Keywords: NTA; proton-recoil; neutron spectroscopy; dose assessment; track length; Monte Carlo; neutron transport; neutron interactions. Includes abstract. Includes bibliographical references.
Doorn, Jan van, and Fredrik Karlsson. "Influence of speech task and utterance length on the measurement of pitch variability in the speech of Parkinson's disease patients after deep brain stimulation." Umeå universitet, Logopedi, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-73374.
Full textIntonation och rytm i talet hos personer med Parkinsons sjukdom - en longitudinell jämförelse mellan sjukdomens effekter och effekter av behandling
Pinto, Manuela Martins. "Correlações macroscópicas e ultrassonográficas das dimensões prostáticas no cão." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/10/10137/tde-24032011-090718/.
Full textThe purpose of this study was to verify the accuracy of the formulas previously established in other studies to determine values of prostate size and suggest a new formula that considers other characteristics of the animal besides the weight to provide a quantitative analysis of prostate. Prostatic ultrasonographic evaluation were performed in 63 non-castrated and healthy dogs of 6 years old in maximun. We obtained the animal\'s weight, height and length of the back. Immediately after death the animals underwent prostatectomy and the actual glandular volume was determined through water column displacement and its mass had been determined by weighting it on an analytical scale. We calculated through pre-established formulas the values of measures prostate as height, length, volume and weight. The weight and volume obtained from the formulas were compared with values obtained weight after weighing and the volume obtained after water column displacement. The values of length and height measurements obtained by the formulas were compared to values of sonographic linear measurements. We obtained the Residual Mean Square (RMS) and percentage to test the adherence of these formulas. After linear regression it was observed a bigger correlation in using the animal\'s measures as various explanation in formulas to calculate the values of length and height measures of the prostate. Measure prostatic length (CL) and height (AL) can be predicted using through formulas: CL = 1,59 + (0,06 * P) + (0,01 * CD) (0,01 * AA) (cm) and AL = 1,06 + (0,05 * P) + (0,003 * CD) + (0,04 * AA) (cm).
Skupin, Katharina. "Absolute Längenmessung prismatischer Körper mit dem beidseitig antastenden Interferometer der PTB." Doctoral thesis, Humboldt-Universität zu Berlin, 2020. http://dx.doi.org/10.18452/21614.
Full textThe present thesis adresses the setup and characterization of PTB´s double-ended interferometer, which allows for absolute length measurement of prismatic bodies without the need for wringing to a platen, which prevents deformation caused by their interaction. In comparison with PTB´s prototype, the measurement uncertainty has been substantially reduced due to an improved temperature measurement system, a temperature stabilized vacuum chamber, optics of better flatness and cameras with higher resolution. Further reduction of the measurement uncertainty has been achieved by the developed adjustment procedure including an autocollimation scanning and a correction of the influence of wavefront aberrations. Multiple configurations of orientation of the beamsplitter plate wedges were tested to minimize the influence of parasitic interferences. Comparison measurements against single-ended interferometers on a steel and a filter glas gauge block resulted in deviations of the measured length in the range of 0.4 to 2.6 nm, which is in good agreement with measurement uncertainties. This proves the capability of absolute length measurement of the double-ended interferometer. Comparison measurements on silicon gauge blocks resulted in significantly shorter lengths than those measured in single-ended interferometers with a reproducible length difference of 4 nm for the different used wavelengths of 532 and 633nm. Those effects are presumably based on material and surface characteristics which seem to have a much stronger impact on the measured length when the sample is not wrung to a platen. Due to the large contribution of the roughness and the phase change on reflection to the measurement uncertainty, the full potential of the double ended interferometer will unfold for measurements on lengths changes, like measurement of the thermal expansion or long term stability of different materials, for which the influence of the roughness and phase change on reflection can be neglected.
Hájková, Alena. "Návrh interní metodiky pro měření výrobků a dílů na přístroji CMM UPMC Zeiss na pracovišti ČMI Brno." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-417433.
Full textMasetti, Lucia. "Measurement of the K± -> p+p-e±v(-)e [K ± pi + pi - e + - (-) v e] form factors and of the pp [pi pi] scattering length a00." [S.l.] : [s.n.], 2006. http://deposit.ddb.de/cgi-bin/dokserv?idn=981815189.
Full textJung, Christian [Verfasser], Reiner [Akademischer Betreuer] Klingenberg, and Ian C. [Akademischer Betreuer] Brock. "Measurement of the mass of the top quark using the transverse decay length and lepton transverse momentum techniques / Christian Jung. Betreuer: Reiner Klingenberg. Gutachter: Ian C. Brock." Dortmund : Universitätsbibliothek Dortmund, 2014. http://d-nb.info/1096507153/34.
Full textD'Agostini, Carla 1978. "Prematuridade e comprimento do colo do útero em gestantes com menos de dezesseis anos." [s.n.], 2013. http://repositorio.unicamp.br/jspui/handle/REPOSIP/310399.
Full textDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Ciências Médicas
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Resumo: O nascimento prematuro é a principal causa de morbidade e mortalidade perinatal. Os estudos avaliando a influência da adolescência na prematuridade são controversos, principalmente em gestantes acima de 16 anos, que não costumam ter desfechos piores que as gestantes adultas. Um dos principais marcadores de risco para o nascimento prematuro em uso é a medida do comprimento do colo do útero por ultrassonografia transvaginal. Avaliar se as gestantes abaixo de 16 anos têm risco aumentado de prematuridade e se têm colos mais curtos é necessário, pois pode ajudar a delinear estratégias de seguimento ou intervenções baseadas no comprimento do colo como marcador de risco. Este estudo subdivide-se em dois capítulos. O primeiro capítulo trata-se de um artigo de revisão sistemática que objetiva verificar se as gestantes com menos de 16 anos têm um risco de prematuridade maior que as gestantes adultas. Foi realizada pesquisa nas bases de dados MEDLINE e LILACS nos últimos dez anos com: os descritores gravidez na adolescência e nascimento prematuro; os descritores gravidez na adolescência e trabalho de parto prematuro; o descritor gravidez na adolescência e a palavra-chave: prematuridade. Foram incluídos 14 estudos, sendo a maioria coortes retrospectivas. Sete destes estudos realizaram controle de possíveis vieses em suas análises estatísticas. Dez dos quatorze estudos avaliados demonstraram associação da idade inferior a 16 anos com nascimento prematuro, sendo que quatro destes tiveram um grande número de pacientes avaliadas com controle de vieses em suas análises (odds ratios variando de 1,5 a 1,7). Podemos concluir que a gestação abaixo de 16 anos está provavelmente associada a um risco inerente de prematuridade quando comparada à gestação adulta. Medidas de prevenção da gestação nesta faixa etária, bem como programas de assistência com o objetivo de minimizar o risco de prematuridade destas pacientes devem ser empregados. O segundo capítulo trata-se de um artigo original que tem por objetivo comparar o comprimento do colo do útero de primigestas menores de 16 anos com primigestas adultas, sendo um estudo transversal, observacional e analítico realizado em primigestas do sistema público de saúde do município de Blumenau (Brasil). Aferiram-se os colos uterinos de primigestas menores de 16 anos e adultas através de técnica previamente validada entre 21 e 24 semanas de idade gestacional. A média do comprimento do colo uterino foi comparada entre os grupos (teste de Mann-Whitney) e a associação da adolescência com colos abaixo de 25 mm foi avaliada (teste exato de Fisher). Oitenta pacientes foram avaliadas (40 adolescentes e 40 adultas). A média do comprimento do colo encontrada nas adolescentes foi de 28 ± 6,6 mm, significativamente menor do que nas adultas (33 ± 4,1 mm) (p <0,0001). A proporção de colos abaixo de 25 mm foi de 27,5% nas adolescentes e 7,5% nas adultas (p <0,02). Assim, conclui-se que as primigestas adolescentes jovens formam um grupo de pacientes com colos mais curtos do que as adultas e com maior proporção de colos menores que 25 mm, merecendo atenção especial na assistência pré-natal quanto ao risco de nascimento prematuro
Abstract: Premature birth is the leading cause of perinatal morbidity and mortality. Studies evaluating the influence of adolescence on prematurity are controversial, especially in pregnant women over 16 years who do not usually have worse outcomes than adult pregnants. The measurement of cervical length by transvaginal ultrasound is one of the main markers of risk for preterm birth. Assess whether women under 16 have an increased risk of prematurity and have shorter cervices is important to outline strategies for follow-up or intervention based on cervical length as a risk marker. This study has two articles. The first article aimed to verify whether pregnant women younger than sixteen years have a higher risk of prematurity than adult women. For this, we did a systematic review of studies comparing preterm birth in teenagers under 16 with adult pregnant women in the last ten years. Fourteen studies were included in the first article, mostly retrospective cohorts. Seven of these studies were accomplished with control of possible biases in its statistical analyses. Ten of the fourteen studies reviewed found an association of age below 16 years with premature birth, and four of these had a large number of patients evaluated, with control of possible biases in its statistical analyses (odds ratios ranging from 1.5 to 1.7). We conclude that pregnancy under 16 years old is probably associated with an inherent risk of preterm birth. Actions to prevent pregnancy in this age group should be employed, as well as specific assistance programs in order to minimize the risk of prematurity in these patients. The second article aimed to compare the length of the cervix in primigravidae under 16 years old with adult primigravidae. An analytical, observational and cross-sectional study was performed with primigravidae under 16 and adults in the public health system in the city of Blumenau (Brazil). Cervical measurements through transvaginal ultrasonography were performed by using a previously validated method, between 21 and 24 weeks of gestation to compare the mean cervical length (Mann-Whitney test) and the frequency of cervices below 25 mm among young adolescents and adult primigravidae (Fisher's exact test). The cervical lengths of 80 patients were measured (40 adolescents and 40 adults). The average length of the uterine cervix found in adolescents was of 28 + / - 6.6 mm and in adults 33 + / - 4.1 mm (p<0.0001) and the proportion of cervices below 25 mm were 27, 5% in adolescents and 7.5% in adults (p<0.02). We concluded that adolescent primigravidae under 16 have shorter cervices than adults, with a higher proportion of cervices shorter than 25 mm. This may be associated with increased risk of preterm delivery in those adolescents who need special attention in prenatal care
Mestrado
Saude da Criança e do Adolescente
Mestra em Ciências
Noorkoiv, Marika. "Neuromuscular adaptations of joint angle-specific force change after isometric training." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2013. https://ro.ecu.edu.au/theses/531.
Full textRocha, Elizabeth Matos. "Uso de instrumentos de mediÃÃo no estudo da grandeza comprimento a partir de sessÃes didÃticas." Universidade Federal do CearÃ, 2006. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=418.
Full textABSTRACT This work approaches a study of âlargeness lengthâ in a real environment of a classroom. According to my researches, authors such as Miguel and Miorim (1986), Duarte (2002), Lima e Bellemain (2002) verify some postures from the school community, which seriously compromise the Geometry teaching, especially in the study field of geometry largeness. Among these postures, I can cite the emphasis given to the contents directed toward to Arithmetic, such as basic Math operations and fractions, while some Geometry topics are superficially approached. From this evidence, I applied and elaborated didactic sessions which the central objective consisted of investigating the use of measurement instruments as a support for the learning of âlargeness lengthâ. The theoretical references that give direction to the cognitive aspect are tied with the Piagetâs assimilation and accommodation processes (1982), in the social interaction process of Vygotsky (1994) and also tied with some Math education elements. This research is of qualitative nature, and in its approach of study of case (LÃDKE & ANDRÃ, 1986) it had a pedagogical practice, through didactic intervention sessions with some students, ages from 11 to 15, in a public school of FortalezaÂs city. As a result, it was confirmed that the work using measurement instruments with students has showed itself as a very efficient resource for the knowledge growth of the considered subject. I hope the evidence of this fact, helps in the destruction of a bad habit created by the school system regarding the approach given to the Math study field âGeometry largenessâ, and not to make students use the adopted textbook as the only didactic resource anymore. Key-Words: largeness length, didactic sessions, instruments of measurement.
Šrámek, Jan. "Stanovení přesnosti měření v nanometrologii." Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-409079.
Full textTan, Sisman Gulcin. "Sixth Grade Students." Phd thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/3/12612004/index.pdf.
Full textconceptual and procedural knowledge and word problem solving skills in the domain of length, area, and volume measurement with respect to gender, previous mathematics achievement, and use of materials. Through the Conceptual Knowledge test (CKT), the Procedural Knowledge Test (PKT), and the Word Problems test (WPT) and the Student Questionnaire, the data were collected from 445 sixth grade students attending public schools located in four different main districts of Ankara. Both descriptive and inferential statistics techniques (MANOVA) were used for the data analysis. The results indicated that the students performed relatively poor in each test. The lowest mean scores were observed in the WPT, then CKT, and PKT respectively. The questions involving length measurement had higher mean scores than area and volume measurement questions in all tests. Additionally, the results highlighted a significant relationship not only between the tests but also between the domains of measurement with a strong and positive correlation. According to the findings, whereas the overall performances of students on the tests significantly differed according to previous mathematics achievement level, gender did not affect the students&rsquo
performance on the tests. Moreover, a wide range of mistakes were found from students&rsquo
written responses to the length, area, and volume questions in the tests. Besides, the results indicated that use of materials in teaching and learning measurement was quite seldom and either low or non-significant relationship between the use of materials and the students&rsquo
performance was observed.
Fulová, Silvia. "Stanovení nejistoty měření optického měřicí stroje pomocí laserinterferometru." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-443250.
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