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Dissertations / Theses on the topic 'Spring constant'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Liu, Yang. "Calibration of Glass Fiber Microcantilevers." Ohio University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1268336942.

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2

Araujo, Maria Tereza de. "Medidas das constantes de mola, de amortecimento e da temperatura para átomos aprisionados e para uma de suas variantes espaciais." Universidade de São Paulo, 1995. http://www.teses.usp.br/teses/disponiveis/76/76131/tde-12052014-165601/.

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Devido à necessidade de caracterizar as armadilhas magneto-ópticas (AMO), as quais fornecem amostras densas de átomos frios, e de extrema importância o conhecimento dos valores das constantes mecânicas k e &#946 inerentes ao movimento harmônico super amortecido dos átomos nestas armadilhas. Neste trabalho, obtivemos estas constantes usando a técnica que aplica uma oscilação forçada aos átomos aprisionados através de um pequeno campo magnético oscilante adicional de forma a não perturbar o aprisionamento. Fizemos um estudo destas constantes como função de alguns parâmetros inerentes ao aprision

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3

Parkin, John D. "Microcantilevers : calibration of their spring constants and use as ultrasensitive probes of adsorbed mass." Thesis, University of St Andrews, 2013. http://hdl.handle.net/10023/3608.

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The dynamic properties of several rectangular and V-shaped microcantilevers were investigated. Particular attention was paid to the higher flexural eigenmodes of oscillation. The potential of the higher flexural modes was demonstrated through the use of cantilevers as standalone sensors for adsorbed mass. The mass adsorbed on the surface of a cantilever was in the form of a homogeneous water layer measured as a function of relative humidity. The minimum detectable water layer thicknesses were 13.7 Å, 3.2 Å, 1.1 Å, and 0.7 Å for the first four modes of a rectangular cantilever, clearly demonstr

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4

Shope, Ronald L. "Response of Wide Flange Steel Columns Subjected to Constant Axial Load and Lateral Blast Load." Diss., Virginia Tech, 2006. http://hdl.handle.net/10919/29521.

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The response of wide flange steel columns subjected to constant axial loads and lateral blast loads was examined. The finite element program ABAQUS was used to model W8x40 sections with different slendernesses and boundary conditions. For the response calculations, a constant axial force was first applied to the column and the equilibrium state was determined. Next, a short duration, lateral blast load was applied and the response time history was calculated. Changes in displacement time histories and plastic hinge formations resulting from varying the axial load were examined. The cases

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5

Sarangapani, Krishna Kumar. "Characterizing selectin-ligand bonds using atomic force microscopy (AFM)." Diss., Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/11650.

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The human body is an intricate network of many highly regulated biochemical processes and cell adhesion is one of them. Cell adhesion is mediated by specific interactions between molecules on apposing cell surfaces and is critical to many physiological and pathological processes like inflammation and cancer metastasis. During inflammation, blood-borne circulating leukocytes regularly stick to and roll on the vessel walls, which consist in part, adhesive contacts mediated by the selectin family of adhesion receptors (P-, E- and L-selectin). This is the beginning of a multi-step cascade that ult

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Barbieri, Rodrigo Antonio. "Influência da temperatura de sinterização nas propriedades mecânicas de molas de alumina injetadas em baixa pressão." reponame:Repositório Institucional da UCS, 2011. https://repositorio.ucs.br/handle/11338/613.

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Neste trabalho foram produzidas molas cerâmicas através do processo de moldagem por injeção em baixa pressão, utilizando-se como matéria-prima alumina submicrométrica, aditivada com ligantes a base de ceras. Dentro do tanque de uma injetora Pelstman, estes materiais foram homogeneizados e resultaram em uma suspensão de baixa viscosidade. Entre os objetivos deste trabalho estão a produção de molas cerâmicas helicoidais com perfil circular, a extração dos ligantes orgânicos utilizados durante a moldagem, a pré-sinterização das molas a 1000°C, o acabamento e a sinterização das molas em diferentes

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7

Meurk, Anders. "Force measurements using scanning probe microscopy : Applications to advanced powder processing." Doctoral thesis, Stockholm, 2000. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3023.

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8

Zerweck-Trogisch, Ulrich. "Auflösungsvermögen und Genauigkeit der Kelvinsonden-Rasterkraftmikroskopie und deren Anwendung an molekularen Systemen." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2007. http://nbn-resolving.de/urn:nbn:de:swb:14-1196782873906-79057.

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Die Arbeit befasst sich mit der Erforschung und Anwendung der Kelvinsonden-Rasterkraftmikroskopie. Die Technik wird bezüglich der Quantität der gemessenen Werte und der erzielbaren lateralen Auflösung untersucht und auf diverse Probensysteme angewandt. Die so erhaltenen nanoskopischen Werte werden mit markoskopischen Messergebnissen verglichen. Sowohl die elektrostatische Kraft zwischen der Messspitze und der Probenoberfläche als auch deren Gradienten können zur Minimierung der elektrostatischen Wechselwirkung herangezogen werden. Die Detektion des Kraftgradienten zum Aufbau eines Regelkreises

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9

MONTEIRO, Roana d’Ávila Souza. "Caracterização eletromecânica de mini molas superelásticas de nitinol em regime de efeito memória de forma sob carga constante." Universidade Federal de Campina Grande, 2015. http://dspace.sti.ufcg.edu.br:8080/jspui/handle/riufcg/453.

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Submitted by Kilvya Braga (kilvyabraga@hotmail.com) on 2018-04-23T13:32:14Z No. of bitstreams: 1 ROANA D'ÁVILA SOUZA MONTEIRO - DISSERTAÇÃO (PPGEM) 2015.pdf: 3977570 bytes, checksum: e1760f7cd8bdc07cce68f5b1aedd33a2 (MD5)<br>Made available in DSpace on 2018-04-23T13:32:14Z (GMT). No. of bitstreams: 1 ROANA D'ÁVILA SOUZA MONTEIRO - DISSERTAÇÃO (PPGEM) 2015.pdf: 3977570 bytes, checksum: e1760f7cd8bdc07cce68f5b1aedd33a2 (MD5) Previous issue date: 2015-08-31<br>Capes<br>As Ligas com Memória de Forma (LMF) constituem uma classe de materiais metálicos que possuem a capacidade de recuperar uma

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Hickerson, Jon D. (Jon David). "The Impact of Corporate Interlocks on Power and Constraint in the Telecommunications Industry." Thesis, University of North Texas, 1992. https://digital.library.unt.edu/ark:/67531/metadc500891/.

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Using the tools of structural and network analysis developed by Ronald R. Burt and others, this study investigated the communication patterns among corporate officers of American Telephone and Telegraph Corporation (A.T. & T.) and United Telecommunications Corporation (Sprint). Data on contacts, efficiency, network density, and constraint indicate that opportunities for power and constraint have remained relatively stable at United Telecommunications between 1980 and 1990. A. A.T. & T., on the other hand, was more affected by the drastic changes in the telecommunication industry. The span of A

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11

Tsai, Nien-Shiun, and 蔡念勳. "The Effect of Structure of Carbon Braid Composite Spiral Spring on Spring Constant." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/28600915706941563111.

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碩士<br>逢甲大學<br>紡織工程所<br>92<br>The envisioned benefits of a composite spring are the reduction of weight, better chemical resistance and electrical insulation. The feasibility of replacing a metal helical compression spring with a composite one having the same characteristics has been studied. Four different types structure of composite helical spring that are unidirectional laminates (AU), rubber core in the unidirectional laminates (UR), braid outer layer cover unidirectional laminates (BU),and rubber core in unidirectional laminates with braid outer layer (BUR)structures respectively, and the

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12

CHEN, CHUN-YUEH, and 陳君岳. "Design for Constant Pressure Gas Spring of the Air Flow Channel." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/31248000960120896861.

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碩士<br>建國科技大學<br>機械工程系暨製造科技研究所<br>100<br>This investigation conduct the basic design about constant pressure gas spring compressed air channel problem. The important term will focus on the performance for the machinery and for the compressed air consumption. In the meantime, the load and impact load is studied for the vibration of the constant pressure gas spring. The results are not the same owing to different design about flow channels. Suitable air flow channel design may sustain same force only a little compressed air. This investigation will use pressure sensor and data acquisition to meas

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13

Chen, Bo-Yi, and 陳伯毅. "Spring Constant of Atomic Force Microscope Cantilevers and Mechanical Property Measurement of Carbon Nanotubes." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/66556183366283442873.

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博士<br>國立清華大學<br>動力機械工程學系<br>96<br>Abstract Atomic force microscope (AFM) has many applications in science research under nano-scale or micro-scale. The mechanical properties of nanostructures can be measured from the deformation of cantilever of atomic force microscope. The accuracy of the mechanical properties depends on the precise calibration of the spring constant of AFM cantilevers. Thus, the spring constant of cantilever must be calibrated before measurement. Many parameters such as coating layers, material properties, geometries, tilt angles, and landing forces, significantly af

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14

Guo, Syuan-Wei, and 郭軒維. "Measuring the equivalent spring constant of the diaphragm by acoustic impedance and electrical impedance method." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/55zuj2.

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碩士<br>國立臺灣大學<br>工程科學及海洋工程學研究所<br>107<br>Moving-coil earphone is an integration of electrical, mechanical and acoustical system. Its performance is determined by the collaboration of these systems. Mechanical system converts electrical energy to acoustical energy, and diaphragm system, which composed of diaphragm and diaphragm rim is part of it. At low frequency, mechanical system can be simulated by an equivalent mass-spring-damper system. The equivalent mass, spring constant, and damping coefficient determine the performance of mechanical system at this frequency range. However, the equivalen

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15

Sung, Wei-lien, and 宋偉廉. "Measurement of Spring Constant of Optical Tweezers using Boltzmann Distribution Method and Power Spectrum Density Method." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/28188774120963807916.

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碩士<br>國立中正大學<br>光機電整合工程所<br>97<br>In this thesis, the historical background and development of an optical tweezers system were first reviewed. The introductory concepts for the basics of trapping a particle, the fundamental principles of operations and the detailed components for a typical optical tweezers were also presented. Subsequently, trapping and manipulation of polystyrene micro particles, bundles of polymer nanowires, and yeast cells were executed and demonstrated by an optical tweezers system set in lab. To describe the trapping force of an optical tweezers system quantitatively, cha

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16

Tsai, Wen-cheng, and 蔡文程. "A Study of Evaluating the Artery Stiffness with Spring Constant of Non-invasive Arterial Photoplethysmography (PPG) Pulse." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/90026192533505472697.

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碩士<br>朝陽科技大學<br>資訊與通訊系碩士班<br>100<br>Cardiovascular disease is the leading cause of mortality in the developed world. Current social changes in eating habits and the increasing economic pressures of life gradually results in the production of many diseases of civilization, such as heart disease, stroke, arteriosclerosis and etc. In this study, we measured the finger pulse of photoplethymography ( PPG) at one-point using a non-invasive way, and measured the radial pulse using pressure sensors. We then calculated the spring constants of both signals. We recruited forty- four subjects in Taichuang

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17

Ho, Tzong-Hsien, and 何宗憲. "Determination of the spring constant of optical tweezers from the Brownian motion of an optically trapped particle." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/44010210977868041883.

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18

Huang, Shu-Wen, and 黃蜀雯. "A Study of Using the Spring Constant of Radial Artery to Analyze the Arterial Elasticity of Atherosclerosis Patients." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/29715957044279333960.

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博士<br>朝陽科技大學<br>資訊管理系博士班<br>102<br>Arteriosclerosis must be detected and treated in its early stage to prevent the occurrence of cardiovascular disease. Particularly, this disease is prone to befall the carotid and coronary arteries. Early detection will help reduce the severity of the disease as the complications have caused a high mortality, so it is the prime task to develop the new technology for early diagnosis or new technique for examination at this moment. This study adopted the non-invasive pressure sensor to measure the radial artery of atherosclerosis patients, analyze the radia

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19

Hung, Li-Jen, and 洪莉珍. "Measurement of the nonlinear spring constant in optical tweezers and study of the interaction between Escherichia coli and substrate." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/35349875945127072750.

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碩士<br>國立陽明大學<br>生醫光電工程研究所<br>96<br>This thesis consists of two parts. In the first part, we report the application of a set of parallel dual tweezers, one stationary and one movable, to trap a polystyrene bead (suspended in de-ionized water) and drag it away from one of the trap centers beyond the linear (Hooke’s spring) regime, to probe the nonlinear optical force constants associate with the optical trap. Mathematically, we represent the nonlinear spring by a 5th order polynomial, with all the even orders absent because of the axial symmetry of the optical trap. By fitting the experimental d

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20

Metaxides, Evangelos. "Static and dynamic testing of a recumbent bicycle's suspension components, and design of a damping coefficient-spring constant test machine." Thesis, 1995. http://hdl.handle.net/1957/35229.

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The purpose of this study is to provide the necessary technical background and data for the development of a suspension system for a recumbent bicycle. For this reason, the customer requirements-design criteria for the development of the suspension system were set, and several static and dynamic tests were conducted on the bicycle's suspension components in order to determine their shock absorption properties. The shock absorption properties of the bicycle's components can be used as means of evaluating the specifications of the suspension system that will satisfy the established design criter

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21

Santos, Miguel Lino Diogo dos. "Relógio com turbilhão tri-axial de força constante." Master's thesis, 2014. http://hdl.handle.net/10316/39023.

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Dissertação de Mestrado Integrado em Engenharia Mecânica apresentada à Faculdade de Ciências e Tecnologia da Universidade de Coimbra<br>Pretende-se com esta tese, estudar e melhorar a cronometria de um relógio mecânico, introduzindo e combinando conceitos, mais ou menos recentes, desenvolvidos pelas indústrias relojoeiras de todo o mundo como o turbilhão tri axial, a espiral dupla e o mecanismo de força constante. Individualmente, figuram em diversos relógios mecânicos presentes no mercado e possuem todos, a característica de serem mecanismos implementados ao movimento com vista à melhori

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22

Cgu, Cheng-Chung, and 朱政仲. "Toward the Constant-Torque Linkage-Type Mechanisms Using Linear Springs." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/64082568982689815327.

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碩士<br>國立臺灣科技大學<br>機械工程系<br>105<br>This study explores the design possibility of a spring-type rigid-link mechanism that produces a constant torque. The mechanism we aim to devise should have rigid links and a spring only without the use of flexible rods and cams. In this thesis, we firstly reviewed the development of the torsional mechanisms. We then put forward two possible mechanism concepts to output constant-torque, and use these two concepts to design three nearly constant-torque mechanisms. Then we analyzed the output torque of each mechanism, and then use Matlab and Adams software to ve

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Mukherjee, Koyel. "Simulation of tetrahedral mesh based organ deformation using parameter optimized spring constants." 2008. http://hdl.handle.net/10106/1055.

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24

Chang, Po-Yuan, and 張柏元. "The Use of Infrared LED for the Detection of Blood Vessels Photoplethysmography and Blood Vessels Spring Constants." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/gnuy42.

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25

Liu, Chia-Hung, and 劉家宏. "Design of Spring Constants for Pressure Regulator and Flow-Field Analysis of the De-Humidifier for a Pneumatic System." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/64466801046921408813.

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碩士<br>龍華科技大學<br>工程技術研究所<br>98<br>Pneumatic system has been widely used in the industry as an essential power supply. For properly operating of the system, air pressure needs to be maintained at a stable range. However, air pressure is subject to change due to the load variation of the system. A pressure regulator is therefore installed to soothe the instability of the pressure. Pressure regulator is controlled by two springs, which acting on the valve of the regulator adjusts valve position for pressure control. The purpose of thisresearch is to propose a design method to determine the spring

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26

Lübbe, Jannis Ralph Ulrich. "Cantilever properties and noise figures in high-resolution non-contact atomic force microscopy." Doctoral thesis, 2013. https://repositorium.ub.uni-osnabrueck.de/handle/urn:nbn:de:gbv:700-2013040310741.

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Different methods for the determination of cantilever properties in non-contact atomic force microscopy (NC-AFM) are under investigation. A key aspect is the determination of the cantilever stiffness being essential for a quantitative NC-AFM data analysis including the extraction of the tip-surface interaction force and potential. Furthermore, a systematic analysis of the displacement noise in the cantilever oscillation detection is performed with a special focus on the thermally excited cantilever oscillation. The propagation from displacement noise to frequency shift noise is studied under c

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