Dissertations / Theses on the topic 'Impact forces'
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Haas, Trevor Neville. "Numerical (FEA) evaluation of crane end buffer impact forces." Thesis, Lilnk to the online version, 2007. http://hdl.handle.net/10019/633.
Full textRobertson, Erin Mhray. "Impact forces in female recreational runners track versus treadmill running /." Diss., Connect to online resource - MSU authorized users, 2008.
Find full textAttumaly, Ashok Benjamin Basil. "A Wedge Impact Theory Used to Predict Bow Slamming Forces." ScholarWorks@UNO, 2013. http://scholarworks.uno.edu/td/1721.
Full textArrhenius, Niklas B. "Ground Forces Impact on Release of Rotational Shot Put Technique." BYU ScholarsArchive, 2014. https://scholarsarchive.byu.edu/etd/4295.
Full textMANGIATERRA, Marco. "Lubricants impact on cutting forces - Torque reduction in tapping process." Thesis, KTH, Industriell produktion, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-245178.
Full textMachining processes are an important part of the manufacturing industry. Companies within the manufacturing industry are required to continuously improve their processes and make them more efficient, to reduce the ecological impact and operational costs. The aim of this thesis is to be able to improve a circular broaching process for an automotive company. The broaching tool is made from solid High-Speed Steel and TiN coated, which is pulled through a hole in the workpiece. Due to multiple cutting edges acting simultaneously, the cutting force is high. With a low relief angle of the cutting tool and low cutting speed, the lubricant plays a critical role in the broaching process. The thesis studies different cutting fluids in a laboratory, by simulating the impact of cutting fluids in a broaching process with tapping operations under similar conditions. The torques values and the behaviour of it during the process have been recorded for different lubricants. The lubricants were found to have a strong influence in the torque required and the chip formation. The relation between lubricant viscosity and lubrication performance was studied. In addition, the relation between chip formation and torque behaviour was explored, showing the importance of chip evacuation capacity. The process has been carried out by using different lubricants to examine the required cutting forces and how they evolved throughout the process. The results and the consecutive analysis have shown an influence of the viscosity in the process. The viscosity is inversely proportional to the capacity of the fluid to access certain critical areas, increasing the friction forces and the generation of long chips. Both the chip size and the ability of the lubricant to evacuate have strong influences on the process.
Lee, Youngjae. "Effects of Fall Technique Training on Impact Forces when Falling from Standing." Thesis, Virginia Tech, 2019. http://hdl.handle.net/10919/89931.
Full textMaster of Science
As falls and fall-related injuries are a major cause of injuries, the purpose of this study was to investigate whether, and to what extent, the stage combat fall technique training could reduce the impact forces of falls from standing. Twenty-six healthy young adults (14 males and 12 females) participated in our study, and were randomly assigned to either a training group or non-training (control) group. Both groups completed a pre-intervention and a post-intervention fall testing session, separated by two weeks, in which they performed naturalistic falls. The training group was required to receive four 1-hour training sessions in the two-week intervention period, led by a certified stage combat fall technique training instructor. The training group then completed a post-intervention fall testing session where they performed naturalistic falls and also falls using the fall technique they learned. The results showed that, following stage-combat fall training, the training group exhibited nearly a 1/3rd reduction in impact forces for both forward and backward falls, while the control group only exhibited 5% and 2% reductions respectively. Our analysis also showed that the training group achieved this reduction in impact force by increasing the impact time and spreading out their bodies more, to distribute the impact over a larger area. To our knowledge, this was the first study to investigate the stage combat fall technique training and demonstrate its effectiveness as an intervention to reduce impact forces of falls, thereby exploring the potential to reduce the number of fall-related injuries.
Pang, Tao, and tony_pang@hotmail com. "Studies on Wheel/Rail Contact Impact Forces at Insulated Rail Joints." Central Queensland University. Centre for Railway Engineering, 2008. http://library-resources.cqu.edu.au./thesis/adt-QCQU/public/adt-QCQU20080410.154708.
Full textPreston, James Franklin. "Technology's impact on student understanding and retention of motion and forces." Diss., Connect to online resource - MSU authorized users, 2008.
Find full textTitle from PDF t.p. (viewed on July 28, 2009) Includes bibliographical references (p. 87-89). Also issued in print.
Dohy, Jennifer Marie. "The Impact of School Policing Practices on Student Behaviors in Ohio Public Schools." Cleveland State University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=csu1463267974.
Full textWilcox, Sylvia Joan. "Ground Reaction Forces Generated by Twenty-eight Common Hatha Yoga Postures." BYU ScholarsArchive, 2010. https://scholarsarchive.byu.edu/etd/2306.
Full textPiché, Steffanie. "Numerical Modeling of Tsunami Bore Attenuation and Extreme Hydrodynamic Impact Forces Using the SPH Method." Thèse, Université d'Ottawa / University of Ottawa, 2014. http://hdl.handle.net/10393/30456.
Full textOlofson, Helena. "Rolling resistance during cornering - Impact of lateral forces for heavy-duty vehicles." Thesis, KTH, Optimeringslära och systemteori, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-177113.
Full textVi betraktar först den enspåriga cykelmodellen och ställer upp samband mellan däckens sidokrafter och kurvradien. Genom däcksmodellen fås ett samband för hur sidokrafterna beror av slipvinklarna. De extra rullmotståndskrafterna för kurvor fås via linjär approximation som funktion av slipvinklarna. Cykelmodellen valideras mot en däcksmodell från Adams. Cykelmodellen tillämpas sedan på ett optimeringsproblem där den optimala hastigheten längs en bana för några givna testfall bestäms så att energiförlusten blir så liten som möjligt. Resultat presenteras för hur mycket bränsle det är möjligt att spara genom att köra med optimal hastighet jämfört med fix medelhastighet. Optimeringsproblemet tillämpas på en specifik lastad lastbil.
Gruden, Gabriella. "The impact of haemodynamic forces on glomerular cells : relevance to diabetic nephropathy." Thesis, King's College London (University of London), 2005. https://kclpure.kcl.ac.uk/portal/en/theses/the-impact-of-haemodynamic-forces-on-glomerular-cells--relevance-to-diabetic-nephropathy(ce003660-55d2-4c8a-abb5-c5daeab4dacd).html.
Full textAltoyan, Abdulaziz S. "Impact of oil and other economic forces on the Saudi stock market." Thesis, University of Leicester, 2004. http://hdl.handle.net/2381/31113.
Full textMoyo, Doice. "Characterisation and optimisation of waterjet impact forces and energy parameters during hydroentanglement." Thesis, Nelson Mandela Metropolitan University, 2012. http://hdl.handle.net/10948/d1020134.
Full textFitzgerald, Meaghan (Meaghan E. ). "Forces and time delay due to impact with gates in ski racing." Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/105708.
Full textCataloged from PDF version of thesis.
Includes bibliographical references (page 37).
In an effort to better understand impacts with gates during ski racing competition, on-snow measurements and observations were made of both standard gates and inflatable gates. These observations highlighted the importance of impact force and time. Two additional experiments were done to analyze these factors and compare their values for standard gates and inflatable gates. Gates were hit with a controlled weighted pendulum and force sensor to measure the impact force. To measure time, slow motion footage was taken of the gates clamped in a baseball pitching machine. The baseball's velocity was scaled to model the skier using conservation of energy principles. The footage was analyzed with position tracker software. Inflatable gates were found to have a lower mean impact force of 28.55 ± 5.89 N compared to the standard gate impact force of 44.55 ± 7.12 N. Although they exhibited lower impact force, the inflatable gates had a longer time to clear out of the skier travel path due to isolated bending in the small area of impact. The time for the tip of the inflatable gate to clear was 0.63 ± 0.1s compared to the 0.43 ± 0.03s it took for the tip of the standard gate to clear. From these results, it can be concluded that inflatable gates have a softer impact force, but require a modification in racing form in order to increase the impact area and thus decrease momentum and balance losses due to gate bending around extremities.
by Meaghan Fitzgerald.
S.B.
Dafny, Leemore S. (Leemore Sharon). "The impact of market forces and public health insurance on inpatient care." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/8653.
Full textIncludes bibliographical references (leaves 98-100).
This dissertation considers both private and public-sector influences on inpatient care, focusing first on the impact of strategic hospital behavior on entry into new procedure markets, and second on the effect of changes in Medicaid and Medicare on hospital care. Chapter 1, "Entry Deterrence in Hospital Procedure Markets: A Simple Model of Learning-by-Doing," investigates whether incumbent hospitals threatened by entry in profitable procedure markets take advantage of learning-by-doing in these markets to erect barriers to entry. By focusing on incumbent behavior following a positive shock to the profitability of a procedure, and comparing this behavior across markets with different levels of entry-deterrence incentives, I am able to detect limited evidence consistent with entry deterrence through learning-by-doing in three case studies: electrophysiological studies, liver transplants, and prostatectomy. Chapter 2, "Does Public Insurance Improve the Efficiency of Medical Care? Medicaid Expansions and Child Hospitalizations," addresses the relationship between health insurance availability and the nature and frequency of hospitalization. Together with co-author Jonathan Gruber, I find that the Medicaid expansions from 1983 to 1996 were associated with a 22% decline in "avoidable hospitalizations," hospitalizations that can potentially be averted by timely outpatient care. However, the increased insurance coverage had a larger, offsetting impact on other types of hospitalizations, yielding a 10% overall increase in child hospitalizations.
(cont.) The effects on intensity of care once in the hospital are ambiguous, but the data show that more children were treated in for-profit facilities, and fewer in public institutions as a result of the expansions in Medicaid. Chapter 3, "Hospital Responses to Changes in Average Reimbursement Rates: An Assessment of a Natural Experiment," explores the effect of increased reimbursement to hospitals on billing practices (specifically, "upcoding") and intensity of care. Because the hospital industry is highly-regulated and predominantly not-for-profit, standard theories of firm behavior may not apply to hospitals, yielding ambiguous a priori predictions of hospital responses to reimbursement changes. My empirical analysis suggests that large increases in reimbursement for particular diagnoses were not met with increased spending on care for patients in those diagnoses. If upheld in future research, this finding has important implications for providers of health insurance, both public and private. Accounting for one-third of health expenditures, and over 4 percent of GDP overall, the hospital sector is critical both to healthcare and to the economy at large. Understanding hospital behavior will require additional investigation of competitive practices as well as public interventions.
by Leemore Sharon Dafny.
Ph.D.
Nolan, Karen J. "The influence of variations in shoe midsole density on the impact force and kinematics of landing in female volleyball players." See Full Text at OhioLINK ETD Center (Requires Adobe Acrobat Reader for viewing), 2004. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=toledo1083796438.
Full textTypescript. "A dissertation [submitted] as partial fulfillment of the requirements of the Doctor of Philosophy degree in Exercise Science." Bibliography: leaves 119-125.
Miller, David Elston. "The fiscal blank check policy and its impact on Operation Iraqi Freedom." Thesis, Monterey, Calif. : Naval Postgraduate School, 2006. http://bosun.nps.edu/uhtbin/hyperion.exe/06Dec%5FMiller%5FDavid.pdf.
Full textBodily, Kyle Gordon. "The Water Entry of Slender Axisymmetric Bodies: Forces, Trajectories and Acoustics." BYU ScholarsArchive, 2013. https://scholarsarchive.byu.edu/etd/4173.
Full textHove, Progress. "The impact of technological marketing on Porter's competitive forces model and SMEs' performance." Thesis, University of Fort Hare, 2012. http://hdl.handle.net/10353/d1007120.
Full textDespret, Ghislain Noël Henri. "Impact du vrillage sur les forces électromagnétiques dans l’entrefer : Applications aux machines asynchrones." Thesis, Ecole centrale de Lille, 2018. http://www.theses.fr/2018ECLI0003/document.
Full textThe induction machine is the reference in railway traction motors. Numerous constraints dictated by standards, particularly regarding acoustic noise, are driving the industry to develop quieter engines. The skewing known to reduce torque ripples seems to also provide a real solution to reduce vibration and noise emitted by the machine. In this context, the project is realized in collaboration with Alstom-Transport located in Ornans with the support of MEDEE (regional pole on energy control). This thesis focuses on the calculation of magnetic forces in the air gap which originate vibration, noise and torque. Analytical and finite element models, which estimate electromagnetic forces and integrate skewing, are presented and compared with experimental measurements of vibration, noise and torque. The models used are valid for the squirrel-cage induction machines but are easily adaptable for synchronous machines. This allows one to understand the origin of the electromagnetic forces responsible for the noise, and to find configurations of less noisy machines. Various parameters such as skewing can be modified to reach this goal, as well as the number of pole pairs, the stator and rotor teeth number, the slot shape, the winding distribution, and so on
Muller, Christopher Dustin. "Shear Forces, Floc Structure and their Impact on Anaerobic Digestion and Biosolids Stability." Diss., Virginia Tech, 2006. http://hdl.handle.net/10919/28768.
Full textPh. D.
Tuchtan, Torrents Lucile. "Etude de la transmission des forces à l’extrémité céphalique suite à un impact facial." Thesis, Aix-Marseille, 2019. http://www.theses.fr/2019AIXM0597.
Full textEstablishing the relationship between the death of an individual and a violent event is a common practice in forensic science. Many cases of death by violence are relatively obvious for the medical examiner. However, the process of identifying the causes of the death is sometimes solely without confirmation of the injury mechanisms. This situation may be the case when anatomical signs of the injury mechanisms are absent, illustrated by cases of death secondary to facial impact, observed at the Institut médico legal, where only histological lesions were objectified.To answer this problematic, a first finite element model of head was realized initially to study the forces transmission to the skull starting from a mandibular impact. We observed a decrease of the efforts transmissions at the skull base following a mandibular impact as well as constraints of Von Mises at the level of the brainstem in particular. This model was enhanced by the addition of a neck and cervical spinal cord to more accurately study brainstem strains, uppercut or anteroposterior mandibular impact, cerebral junction and hyperextension of the cord are observed.These lesional mechanisms involving stresses in the area of the cerebral peduncles, are in agreement with our results of numerical simulations by finite elements. This level of stress observed, very close to the threshold value reflecting brain lesions, suggests possible axonal lesions.Biological parameters are different in each individual, and by using digital modeling they can be modulated at will for a realistic approach of forensic applications
Luckscheiter, Jochen. "Impact investing in South Africa: identifying the global and local forces shaping this emerging investment market." Master's thesis, University of Cape Town, 2014. http://hdl.handle.net/11427/29003.
Full textRitchie, Stephen Harvey. "An investigation of the prevalence and impact of organisational learning in UK police forces." Thesis, Robert Gordon University, 2010. http://hdl.handle.net/10059/590.
Full textLee, Jee Hye Hwang Johye. "Luxury marketing the impact of motivations as psychological forces on attitudes toward luxury restaurants /." Diss., Columbia, Mo. : University of Missouri-Columbia, 2008. http://hdl.handle.net/10355/6075.
Full textThe entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description,or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on August 19, 2009) Includes bibliographical references.
Callaway, Anthony Leonard. "A century of child soldiers : a critical review of their impact on land forces." Thesis, King's College London (University of London), 2015. http://kclpure.kcl.ac.uk/portal/en/theses/a-century-of-child-soldiers(2329fb60-b5fb-451a-976e-a128a7714ee0).html.
Full textLogan, Suzanna Jean. "Ground Reaction Force Differences Between Running Shoes, Racing Flats, and Distance Spikes in Runners." BYU ScholarsArchive, 2007. https://scholarsarchive.byu.edu/etd/925.
Full textMurphy, Marc Patrick Henry Joseph. "A psychophysical study to determine maximum acceptable hand impact forces during door trim installation, effects of hand posture and impact gloves." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape9/PQDD_0009/MQ52617.pdf.
Full textAndersdotter, Matilda, and Evelina Rosenlöf. "Correcting Societal Issues Through Business : A Multiple Case Study of Inhibiting Factors for Scaling Social Impact in Sweden." Thesis, Högskolan i Jönköping, Internationella Handelshögskolan, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-39599.
Full textIdowu, Ifeolu Mobolaji. "Numerical evaluation (FEA) of end stop impact forces for a crane fitted with hydraulic buffers." Thesis, Stellenbosch : University of Stellenbosch, 2010. http://hdl.handle.net/10019.1/5399.
Full textENGLISH ABSTRACT: End stop impact forces are horizontal longitudinal forces imposed by the crane on the end stops. Both the previous South African loading code SABS 0160:1989 and the current South African loading code SANS 10160 , classify end stop impact force as an accidental load case , hence they are not expected to occur within the expected lifetime when the guide lines for crane operation are strictly adhered to. In the estimation of end stop impact force, the previous South African loading code SABS 0160:1989 gives two guidelines for estimating the end stop impact force. The first guideline is simplistic in its approach and it’s based on the assumption that the crane and its supporting structure act as rigid bodies; hence calculation is based on rigid body mechanics. Literature reviewed reveals that this is not correct. The second guideline is more explicit in its approach as it takes into account the crane speed, resilience of the buffers and resilience of the end stops. The current South African loading code, SANS 10160 gives a better representation of the dynamics of the crane movement. However, the dynamic factor recommended for the estimation of end stop impact force is empirical in nature and thus lacks adequate scientific backing. One of the purposes of this research was to investigate the influence of the stiffness of the crane bridge on the end stop impact force. This was achieved by conducting a series of FEA simulations on the double bridge EOHTC fitted with elastomeric buffers. For this set of simulations, the effect of each influencing parameter on the end stop impact force was investigated, and the maximum end stop impact force was obtained using a constraint optimization technique. From the results obtained, comparison was then made with the existing maximum end stop impact force for a single bridge EOHTC fitted with elastomeric buffers. Another purpose of this research was to investigate the end stop impact force for an electric overhead travelling cranes (EOHTC) fitted with hydraulic buffers taking into account the dynamics involved in the movement of the EOHTC. This was achieved by a series of experimental and numerical investigation. The numerical investigation was conducted using an existing numerical model of an EOHTC which captures the crane and its supporting structure as a coupled system. Finite element analysis (FEA) impact force histories obtained were calibrated to the base experimental impact force histories. Thereafter, a series of FEA simulations were conducted by changing the parameters which have a substantial effect on the end stop impact forces. This yielded various maximum impact peaks for various parameters. The maximum impact force was then mathematical obtained from the FEA impact force histories for a given level of reliability using a constraint optimization technique. Also, codified end stop impact forces were calculated for the SABS 0160:1989 and SANS 10160-6:2010. From the results obtained, comparison was made between the codified end stop impact force and the maximum impact force obtained from the constraint optimization technique.
AFRIKAANSE OPSOMMING: Ent buffer impak kragte is horisontale kragte wat deur die kraan op die entbuffers aangewend word. Beide die Suid Afrikaanse las kode SABS 0160:1989 en die voorgestelde Suid Afrikaanse las kode SANS 10160, klasifisseer die entbuffer impak kragte as ‘n ongeluks las geval, dus word die kragte nie verwag tydens die verwagte leeftyd van die kraan wanneer die riglyne van die kraan prosedures streng gevolg word nie. Volgens die Suid-Afrikaanse las kode SABS 0160:1989 word daar twee riglyne voorgestel om die entbuffer kragte te bepaal. Die eerste riglyn is ‘n eenvoudige riglyn en word gebaseer op die aaname dat die kraan en die ondersteunende struktuur as ‘n starre ligame reageer en dus word die kragte bereken deur star ligaam meganika, alhoewel, uit die literatuur word dit bewys as inkorrek. Die tweede riglyn is ‘n meer implisiete benadering aangesien dit die kraan snelheid, elastisiteit van die buffers sowel as die elastisiteit van die end stoppe in ag neem. SANS 10160-6:2019 gee ‘n beter benadering van die dinamiese beweging van die kraan. Die voorgestelde dinamiese faktor waarmee die ent_buffer_kragte bereken word, is empiries van natuur . Een van die doelstellings vir die navorsings projek was om te bepaal wat die invloed van die kraan brug se styfheid op die entbuffer kragte is. ‘n Aantal Eindige Element Analise (FEA) simulasies is uitgevoer op ‘n dubbel brug elektriese aangedrewe oorhoofse kraan met elastomeriese buffers. Van die stel FEA simulasies kan die invloed van elke parameter op die entbuffer impak_kragte bepaal word. Die maksimum entbuffer impak_kragte is bepaal met behulp van ‘n beperking optimiserings tegniek. Vanaf hierdie resultate is ‘n vergelyking gemaak met die bestaande maksimum ent_buffer impak_kragte vir ‘n enkel brug elektriese oorhoofse aangdrewe kraan met elastomeriese buffers. ‘n Tweede doel rede vir die navorsing was om te bepaal wat die ent buffer impak_kragte op ‘n elektriese aangedrewe oorhoofse kraan met hidrouliese buffers is. Dit is bepaal deur ‘n aantal eksperimentele en numeriese toetse uit te voer. Die numeriese toetse is uitgevoer deur gebruik te maak van ‘n huidige numeriese model van ‘n elektriese aangedrewe oorhoofse kraan wat die kraan en die ondersteunende struktuur as ‘n. Die Eindige Element Analise impak_kragte is gekalibreer teen die eksperimenteel bepaalde impak- kragte. Daarna is ‘n reeks Eindige Element Analise simulasies uitgevoer en sodoende die parameters te verander wat die mees beduidende invloed op die end stop impak_kragte het. Dit het verskeie impak_krag pieke vir verskillende parameters meegebring. Die maksimum impak kragte is bepaal van die impak kragte van die Eindige Element Analise vir ‘n gegewe vlak van betroubaarheid deur gebruik te maak van die beperking optimiserings tegniek. Daarmee saam is die gekodifiseerde ent buffer impak kragte bereken volgen SABS 0160:1989 en die SANS 10160- 6:2010. Vanaf hierdie resultate is ‘n vergelyking gemaak tussen die gekodifiseerde entbuffer impak_kragte en die maksimum impak_kragte wat bepaal is deur die (beperking optimiserings tegniek).
James, Aricatt John, and Devarajan Velmurugan. "Determination of stresses and forces acting on a Granulator knife by using FE simulation." Thesis, Tekniska Högskolan, Högskolan i Jönköping, JTH. Forskningsmiljö Produktutveckling - Simulering och optimering, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-28297.
Full textLucchesi, David. "Effets des forces non-gravitationnelles sur les satellites LAGEOS : impact sur la détermination de l'effet Lense-Thirring." Nice, 2001. http://www.theses.fr/2001NICE5691.
Full textThis Ph. D. Thesis has been concentrated upon the study of the non-gravitational perturbative effects on LAGEOS satellites orbit and on the influence of these perturbations with regard to the geodynamical applications and to the Lense-Thirring effect determination. Indeed, laser ranging from Earth bound stations of these passive satellites has allowed the first direct measurement of the relativistic precession of the satellite orbital plane due to the Earth angular momentum, the so called Lense-Thirring effect. In this work we have investigated the perturbative effects due to the following non-conservative forces: i) direct solar radiation pressure, ii) Earth albedo radiation pressure, iii) solar Yarkovsky thermal thrust, iv) Earth Rubincam thermal thrust and v) anisotropic reflectivity of the satellite hemispheres. Our studies and analyses have been focused on the subsequent elements of the satellites orbit: a) eccentricity vector excitations components, b) argument of perigee rate, c) inclination rate and d) node rate. These studies have been performed both analytically and numerically, integrating the satellites orbits over a 7 years period. We have been particularly interested to LAGEOS II orbit analysis, and indeed these studies are new for several of the cited elements in the case of LAGEOS II. We have analysed 4. 7 years of LAGEOS II perigee and node residuals with respect to a reference orbit and we estimated from their fit the satellite parameters characteristic of the Yarkovsky effect and of the anisotropic reflectivity. The results obtained are totally new for LAGEOS II. Then we have estimated how the uncertainties of these non-gravitational effects influence the measurement of the Lense-Thirring effect. Finally we have given – over a 7-year period – the error budget estimate for the Lense-Thirring effect measurement due to different perturbations
Olivero, Lara Humberto Jose. "Quantifying the Ergonomic Impact on Healthcare Workers Using a Needle-free Injector Device." Scholar Commons, 2013. http://scholarcommons.usf.edu/etd/4739.
Full textChiarenza, Antonio. "Professions, legitimacy and change : the impact of political and economic forces on a large city library system in Britain." Thesis, University of Leicester, 2000. http://hdl.handle.net/2381/30733.
Full textCastro, Ricardo Borges de. "The impact of the European Union on the guardianship role of the Turkish armed forces : from democratization to desecularization?" Thesis, University of Oxford, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.547738.
Full textBitsini, Nkosinathi. "Investigating the impact of institutional forces on the operations of an organisation-implemented ERP system in a developing country." Master's thesis, University of Cape Town, 2016. http://hdl.handle.net/11427/23658.
Full textFriedrich, Christian [Verfasser], Reiner [Akademischer Betreuer] Quick, and Dirk [Akademischer Betreuer] Schiereck. "Corporate Misconduct and the Impact of Market Forces, Regulatory Change, and Auditor-Provided Services / Christian Friedrich ; Reiner Quick, Dirk Schiereck." Darmstadt : Universitäts- und Landesbibliothek, 2021. http://d-nb.info/1228537488/34.
Full textAravindababu, Sumanth Ram. "Investigation of sources of wheel-rail impact force deviation through dynamic simulations." Thesis, KTH, Fordonsdynamik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-302783.
Full textPå grund av den ökade efterfrågan på godstransporter är det nödvändigt attundvika förseningar för att säkerställa att varorna når sin destination i tid. Deviktigaste faktorerna som orsakar störningar i trafiken på huvudlinjen är stopp ispår av fordon, främst på grund av skadade hjul. De skadade hjulen identifierasmed hjälp av mätningar av slagkraft mellan hjul och spår som tillhandahållsav hjulbelastningsdetektorer (WILD). Detta kräver ett optimerat schema förunderhåll av hjulsatser och vagnar i allmänhet. Under underhållet kontrollerartjänstemännen manuellt för defekta hjul och utbytet av hjulsatser utförs baserat på typen av skada. Klassificeringen av hjulskador spelar en viktig roll närdet gäller att underlätta identifiering av skador och ge insikt för att bedöma enstrategi för hjulbyte. I den här studien görs ett försök att klassificera de skadade hjulsatserna genom att analysera data från slagkraften mellan spår ochhjul från detektorer. Uppgifterna från detektorerna hämtas från PredgeAB, enLuleå-baserad uppstartsbolag som är pionjärer för att ge beslutsstöd om optimala underhållsscheman och prediktivt underhåll av järnvägshjul. Genom sinadetekterings- och prediktiva lösningar observerades att 10% av alla hjul märktasom skadade av detektorerna var oskadade. Källan till avvikelsen i slagkraftavläsningarna kan hjälpa Predge att göra bättre uppskattningar när det gällerupptäckning och förutsägelse av skador. I den här studien studeras de källorsom bidrar till avvikelsen med simuleringar av flera kroppar i GENSYS. En nymetod för modellering av hjulskador har utvecklats för att övervinna programvarans brister. Resultaten av denna studie skulle kunna användas på lämpligtsätt för att göra klassificeringar av hjulskador.
Horsten, Sharon. "The impact of competition on the product-market strategies of entities in the pharmaceutical industry / Sharon Horsten." Thesis, North-West University, 2004. http://hdl.handle.net/10394/549.
Full textThesis (M.Com. (Management Accounting))--North-West University, Potchefstroom Campus, 2005.
Bretz, David A. "A computer simulation approach to the study of effects of deck surface compliance on initial impact impulse forces in human gait." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2000. http://handle.dtic.mil/100.2/ADA378301.
Full textThesis advisor(s): Kwon, Young W.; McGhee, Robert B. "March 2000." Includes bibliographical references (p. 79-82). Also available online.
Malmström, Martin, and Henrik Orre. "The driving forces on the Swedish compressed natural gas market and the impact on OKQ8's strategy : A qualitative study." Thesis, Uppsala universitet, Företagsekonomiska institutionen, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-127163.
Full textBomo, Jérémy. "Impact des forces de tension sur le phénotype hépatocytaire in vitro : caractérisation de la matrice de collagène dans la fibrose hépatique par microscopie SHG." Thesis, Rennes 1, 2014. http://www.theses.fr/2014REN1S163/document.
Full textLiver fibrosis is a real public health problem. This pathology is characterized by an excessive accumulation of extracellular matrix, mainly composed of collagen, increasing liver rigidity. Approximately 90% of hepatocellular carcinomas develop from a fibrotic/cirrhotic liver, suggesting a relationship between tissue rigidity and tumor development. To investigate the role of stiffness on the hepatic phenotype, we have developed a 3D culture model of collagen gels of varying stiffness. Our results show a better survival, an increase of proliferation and differentiation of liver cells in rigid matrices. In addition, the cells are able to modify the collagen matrix and to form collagen signatures TACS (Tumor Associated Collagen Signatures). An analysis of the signaling pathways involved in the formation of TACS 3 allowed us to determine that 2 pathways are important for these mechanisms: MEK/ERK and MLCK. The high level of differentiated functions and biotransformation of the hepatic cells make 3D collagen cultures an excellent model for applications in biotechnology. Using the SHG microscopy, we have also developed a standardized and automated quantification of collagen to detect small amount of collagen in a mouse liver fibrosis model. This technique allows us to characterize qualitatively the collagen and to strengthen the discrimination between fibrotic scores. The characterization of the collagen cross-links by this approach is under study and would allow to study the reversion capacity
Lokmanis, Arnis. "From independence to alliance : NATO impact on Latvian Security environment in the Post Cold War era /." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://library.nps.navy.mil/uhtbin/hyperion/04Dec%5FLokmanis.pdf.
Full textThesis Advisor(s): Mikhail Tsypkin, Hans-Eberhard Peters. Includes bibliographical references (p. 57-58). Also available online.
Viero, Fernanda Todeschini. "Análise cinética do soco no karatê em postura natural e avançada." Universidade do Estado de Santa Catarina, 2011. http://tede.udesc.br/handle/handle/237.
Full textCoordenação de Aperfeiçoamento de Pessoal de Nível Superior
The main objective of this study was to analyze the kinetic characteristics of the punch in karate in natural stance and advanced where the proposed specific objectives were to verify the strength values (component orthogonal to the fixed target) generated by karate straight punch during the impact on fixed target; measuring ground reaction forces in three orthogonal directions: vertical (z), antero-posterior (y) and medio-lateral (x); compare the peak force of the punch normalized by body weight between the natural posture and stance; and compare the percentage of body weight at the time of peak force of the punch between the natural posture and stance. The study included nine practitioners of Traditional Shotokan Karate, male, graduated from the first dan, and over the age of eighteen years, all invited to participate voluntarily in the study. For the collection of ground reaction forces were used two force platforms AMTI model OR6-GT and the analysis of the punch device was developed with a fixed target instrumented. Data collection was divided into two stages, the first was rated the straight punch in front stance and the second was evaluated in a natural posture. We collected data from participants, the anthropometric characteristics taken after heating the same individual adjusted to the pre-determined position, on the force platforms in front of the column, where your equipment with the target fixed for the execution of instrumented punches average level. The kinetic parameters analyzed were interpreted with the aid of a software routine in scilab-5.3.3 (INRA, France). To present the data we used descriptive statistics. Additionally, we used the paired t-test for detecting differences in performance parameters between the punch and natural stance. All tests were carried out using SPSS 17.0 software (SPSS, USA) at a significance level of 5%. The results showed that the absolute values of impact found in this independent study confirm the stance taken karate as the art of teaching the final blow. In terms of ground reaction forces in three orthogonal directions (z, y, x), results were obtained with the forces in the orthogonal directions z and y, being that on the other hand for ortogonal direction x, the same one was rejected ahead of the necessity for a more accurate analysis. As for comparisons were obtained significant results (p <0.05) for the intensities of punches between the advanced and natural postures and non-significant results (p> 0.05) for the percentage weights at the moment of peak force between the punch advanced postures and natural. Finally, it was stressed that it seems the hip rotation is so important in the efficiency of the blow given that you can make a relationship between the intensity obtained from the impact of the blow and magnitude of the binary system generated by the actions of the feet.
O principal objetivo deste estudo foi analisar as características cinéticas do soco no Karatê em postura natural e avançada onde os objetivos específicos propostos foram verificar os valores de força (componente ortogonal ao alvo fixo) gerados pelo soco direto do karatê durante o impacto no alvo fixo; medir forças de reação do solo nas três direções ortogonais: vertical (z), ântero-posterior (y) e médio lateral (x); comparar o pico de força do soco normalizado pelo peso corporal entre a postura natural e a postura avançada; e comparar o percentual do peso corporal no momento de pico de força do soco entre a postura natural e a postura avançada. Participaram deste estudo nove praticantes de Karatê Shotokan Tradicional, do sexo masculino, graduados a partir do 1o dan, e com idade superior a dezoito anos, todos convidados a participar voluntariamente do estudo. Para as coletas das forças de reação do solo foram utilizadas duas plataformas de força AMTI modelo OR6-GT e para a análise do soco foi desenvolvido um dispositivo com o alvo fixo instrumentado. A coleta de dados foi dividida em duas etapas, na primeira foi avaliado o soco direto na postura avançada e na segunda foi avaliado na postura natural. Foram coletados os dados dos participantes, tomadas as características antropométricas e após aquecimento individual, o mesmo ajustou-se à posição pré-estabelecida nas plataformas de força em frente à coluna, onde se encontrava o aparato com o alvo fixo instrumentado para a execução dos socos a nível médio. Os parâmetros cinéticos analisados foram interpretados com auxílio de uma rotina no software Scilab-5.3.3 (INRA, França). Para apresentar os dados foi utilizada a estatística descritiva. Adicionalmente, foi utilizado o teste t pareado para verificar diferenças nos parâmetros da execução do soco entre a postura avançada e natural. Todos os testes foram realizados com auxílio do software SPSS 17.0 (SPSS, EUA) a um nível de significância de 5%. Pelos resultados verificou-se que para os valores absolutos de impacto encontrados neste estudo independente da postura adotada confirmam o karatê como sendo a arte da doutrina do golpe definitivo. No que tange às forças de reação do solo nas três direções ortogonais (z, y, x), respostas foram obtidas para as forças nas direções ortogonais z e y, sendo que em contrapartida para a direção ortogonal x, a mesma foi desprezada diante da necessidade de uma análise mais acurada. Quanto às comparações se obtiveram resultados significativos (p<0,05) para as intensidades dos socos entre as posturas avançada e natural e resultados não significativos (p>0,05) para os pesos percentuais durante o momento de pico de força do soco entre as posturas avançada e natural. Por fim, destacou-se que ao que parece o giro do quadril tem tanta importância na eficiência do golpe haja vista que se pode fazer uma relação entre a intensidade obtida através do impacto do golpe e magnitude do sistema binário gerado pelas ações dos pés.
Soumbo, Marvine. "Adsorption des protéines sur les surfaces de couches minces de silice seules ou additivées de nanoparticules d'argent : impact sur les forces d'adhésion de Candida albicans." Thesis, Toulouse 3, 2019. http://www.theses.fr/2019TOU30258.
Full textMicrobial adhesion on solid surfaces is the source of multiple negative impacts in many areas. This step is considered prior to biofilm formation. It might be influenced by the presence of a conditioning layer generated after protein adsorption on the surface. Thus, strategies to act during the initial phase of microbial adhesion represent an appropriate approach to prevent bio-contamination of solid surfaces. However, they require understanding of the underlying mechanisms at the molecular level. In this context, nanocomposite materials based on silver nanoparticles (AgNPs) and silica (SiO2) appear as relevant tools. This thesis focuses on the use of nanocomposite thin layers containing a plan of AgNPs exposed on their surfaces or buried in a SiO2plasma matrix at a controlled distance of a few nanometers from the surface in order to explore, on the one hand, the adhesion of model proteins (Bovine Serum Albumin, DsRed and Fibronectin) and their conformational changes and secondly, the kinetics of detachment of the yeast Candida albicans under the different conditions. AgNPs are well known for their antimicrobial activities but also for their optical properties allowing detection of molecular signatures at their proximities. Following the application of surface-enhanced Raman spectroscopy using AgNP-based nanocomposite layers, the detection of three conformations of DsRed (red fluorescent protein) adsorbed and dehydrated on plasmonic substrates was achieved. The obtained results show that the conformational changes of proteins with a strong internal coherence are reversible. In parallel, we have evaluated the dynamics of the organization and behavior of BSA, Fn and DsRed in contact with thin silica layers or silica layers containing AgNPs. Contact angle measurements of droplets of different protein concentrations showed increasing hydrophilic interaction with thermal SiO2th. For the nanocomposite layers, the surface hydrophobicity is modified. The thickness and optical properties of the adsorbed protein layers were evaluated by spectroscopic ellipsometry. Depending on the protein concentration in solution the results show the evolution of a non-continuous and non-dense protein monolayer to a more compact and complex monolayer at high concentrations. [...]
Yu, Tsung-Chi Max. "The impact of US-China relations on Taiwan's military spending (1966-1992)." Thesis, University of North Texas, 2002. https://digital.library.unt.edu/ark:/67531/metadc3100/.
Full textStates, Eliza. "A Discussion of the Impact of Political and Economic Forces on Equitable Access to Potable Water in Ecuador and Recommendations for Improvement through Better Watershed Management." Scholarship @ Claremont, 2014. http://scholarship.claremont.edu/pitzer_theses/52.
Full textShackelford, Philip Clayton. "On the Wings of the Wind: The United States Air Force Security Service and Its Impact on Signals Intelligence in the Cold War." Kent State University Honors College / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=ksuhonors1399284818.
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