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Jasbinschek, dos Reis Pinheiro Katia. "Mantle electrical conductivity estimates from geomagnetic jerk observations /." Zürich : ETH, 2009. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=18259.
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Kinney, Justin P. "Jerk limited reference trajectory generation for motion control." Thesis, Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/16024.
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Abuasaker, Sufyan. "Anti-jerk controller with optimisation-based self-tuning." Thesis, University of Surrey, 2016. http://epubs.surrey.ac.uk/810442/.
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One of the major phenomena compromising the comfort of the passenger vehicles is jerk. Jerk occurs as a response to the transient in the driver torque demand. The transient provokes torsional oscillation of the drivetrain, which results in oscillations and jerk of the vehicle. These oscillations and jerk are transmitted to the driver and can cause discomfort to the driver and thus affecting the drivability of the vehicle. The aim of this work is to develop an anti-jerk controller to achieve smooth response of the vehicle and enhance the drivability metrics. The drivability analysis in this thesis focused on the longitudinal dynamic response during the tip-in manoeuvre. The anti-jerk controller introduced in this work is an optimisation-based controller. It is developed by using two models, i.e. a linear model and non-linear model. The developed models include detailed description of the drivetrain system such as clutch, primary shaft, secondary shaft, differential, half-shaft, tyres and the vehicle. The engine was modelled using the engine map. To achieve high confidence of the models fidelity, the models were verified by experimental data which ensures that the models are accurate and characterised by the required details. The anti-jerk controller is an optimised controller and uses a gain scheduling where the gain scheduling optimisation was performed off-line to reduce the engineering time in the controller gain tuning. The simulation results of the models with the controller show a significant improvement of the drivability, which is measured by the overshoot and the rise time on the acceleration profile.
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Lang, H. M., R. Lund, T. K. Ficklin, and Caleb D. Bazyler. "The Effect of Two Jerk Techniques on Barbell Kinematics." Digital Commons @ East Tennessee State University, 2018. https://dc.etsu.edu/etsu-works/3829.
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The split jerk and power jerk are two commonly used lifts among strength and conditioning coaches, as well as lifts included in the sport of Olympic weightlifting. However, it is unknown which of these jerk techniques exhibit more advantageous barbell kinematics. PURPOSE: To compare the barbell kinematics between a power jerk and a split jerk at a constant load. METHODS: Twelve men were recruited for this study (height = 1.8 ± 0.1 m; mass = 85.3 ± 10.2 kg; age = 23.4 ± 2.4 years). All subjects had been completing the jerk for a minimum of six months, and reported their split jerk 1 repetition maximum (1-RM: 105.3 ± 19.1 kg). Subjects completed 3 repetitions of each jerk technique, at 85% of their split jerk 1-RM. The data were collected using 6 3D video cameras, with a sampling rate of 200Hz and were analyzed using Vicon software. A multivariate paired t-test was used to determine the effect of jerk technique on all kinematic variables. Paired samples t-tests were used as post hoc analyses when necessary. An alpha level of (p<0.05) was used for all inferential statistics. RESULTS: No significant differences were found between the two techniques for starting barbell position, lowest barbell position and maximum concentric velocity. Peak barbell height, range and displacement were all found to be significantly greater in the power jerk when compared to the split jerk (p<0.05). CONCLUSIONS: Results suggest that more work is done on the barbell, and greater range of motion, occur during the power jerk. The results suggest that more work may be done on the body during the split jerk due to the technique of dropping quickly under the bar for the catch. Less work done on the barbell could result in higher absolute loads, making the split jerk the superior technique for populations such as weightlifting athletes.
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Georgii-Hemming, Bo. "Träd : ett försök till lacansk läsning av Walter Ljungquists berättelser särskilt Jerk Dandelinsviten /." Uppsala : Almqvist & Wiksell, 1997. http://catalogue.bnf.fr/ark:/12148/cb411495512.
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Dissertation--Uppsala, 1997.Bibliogr. p. 371-406. Résumé en anglais sous le titre : "Tree : an attempt at a Lacanian reading of Walter Ljungquist's narratives, with special regard to the Jerk Dandelin series"
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Smith, Christian. "Input Estimation for Teleoperation : Using Minimum Jerk Human Motion Models to Improve Telerobotic Performance." Doctoral thesis, KTH, Datorseende och robotik, CVAP, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-11590.
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This thesis treats the subject of applying human motion models to create estimators for the input signals of human operators controlling a telerobotic system.In telerobotic systems, the control signal input by the operator is often treated as a known quantity. However, there are instances where this is not the case. For example, a well-studied problem is teleoperation under time delay, where the robot at the remote site does not have access to current operator input due to time delays in the communication channel. Another is where the hardware sensors in the input device have low accuracy. Both these cases are studied in this thesis. A solution to these types of problems is to apply an estimator to the input signal. There exist several models that describe human hand motion, and these can be used to create a model-based estimator. In the present work, we propose the use of the minimum jerk (MJ) model. This choice of model is based mainly on the simplicity of the MJ model, which can be described as a fifth degree polynomial in the cartesian space of the position of the subject's hand. Estimators incorporating the MJ model are implemented and inserted into control systems for a teleoperatedrobot arm. We perform experiments where we show that these estimators can be used for predictors increasing task performance in the presence of time delays. We also show how similar estimators can be used to implement direct position control using a handheld device equipped only with accelerometers.QC 20100810
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Salmond, Layne Hancock. "Characterization of Smoothness in Wrist Rotations." BYU ScholarsArchive, 2014. https://scholarsarchive.byu.edu/etd/4322.
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Smoothness is a hallmark of healthy movement and has the potential to be used as a marker of recovery in rehabilitation settings. While much past research has focused on shoulder and elbow movements (reaching), little is known about movements of the wrist despite its importance in everyday life and its impairment in many neurological and biomechanical disorders. Our current lack of knowledge regarding wrist movement prevents us from improving current models, diagnosis, and treatment of wrist disorders. In particular, while movement smoothness is a well-known characteristic of reaching movements and may potentially be used to diagnose and monitor recovery from neurological impairments, little is known about the smoothness of wrist rotations. Therefore, because the smoothness of wrist rotations has not been characterized, it cannot be used as a marker for diagnosis and evaluation. This study examines the smoothness of wrist rotations in comparison to the known baseline of reaching movements. Subjects were asked to perform wrist and reaching movements under a variety of conditions, including different speed and direction. To measure movement smoothness, this study used an established metric of speed profile number of maxima and presents a novel method for characterizing smoothness by fitting a minimum-jerk trajectory to real movement data.The results show that 1) wrist rotations are significantly less smooth than reaching movements (p≤0.0016), 2) smoothness decreases significantly as speed decreases (p<0.0001), and 3) wrist movements exhibit a pattern of smoothness that varies significantly between targets and outbound/inbound movement directions (p<0.0001). Potential causes for results 1 and 3 are presented and tested by simulation or reference to prior studies, because these findings were previously unknown. The decrease in smoothness with speed (result 2) has been found in prior studies of smoothness in reaching and finger movements. The reasoning behind the first result is explored by testing whether the difference in smoothness between wrist and reaching movements was due to differences in mechanical, muscular, neural, or protocol-related properties. The reasoning behind the third result is explored by testing whether the difference in wrist direction was due to anisotropy in musculoskeletal dynamics or anisotropy in movement duration. The simulations show that the wrist’s bandwidth is greater than that of the arm, and that there is nonvoluntary power in the bandwidth of the wrist that would be low-pass filtered in reaching movements, indicating that at least some of the difference in smoothness between wrist and reaching movements is due to differences in mechanical properties. Differences in muscular, neural, or protocol-related properties (signal-dependent noise, proprioceptive acuity, and the speed requirements of the task, respectively) do not appear to be the cause of the difference in smoothness between wrist and reaching movements. Differences in wrist smoothness between movement directions appears to be related to differences in movement duration between directions.
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Huitson, Niki Rae. "An exploratory analysis of the emergence and implications of Breed Specific Legislation: knee-jerk reaction or warranted response? /." Burnaby B.C. : Simon Fraser University, 2005. http://ir.lib.sfu.ca/handle/1892/2361.
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Oberhauser, Joseph Q. "Design, Construction, Control, and Analysis of Linear Delta Robot." Ohio University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1460045979.
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Hradil, Jan. "Optimalizace přímého pohonu posuvové osy pomocí hltiče vibrací." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229516.
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This diploma thesis deals with the application of three methods to limit resonances of critical frequencies and with a description of their influence on speed control loop of linear drive. The first damping method involved the use of an electro-magnetic tilger attached to the structure of stand on critical locations. The second method involved the use of a jerk decoupling in linear direct drives. A Cauer-filter that was activated in the controller of linear motor was added to both methods. The appropriate measuring technique for these frequencies was systematically analysed and selected. Further in this document models of mechanical structure and controlling are described. Matlab®/Simulink® software was used for the data processing and the modification of models according to the real structure.
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Travis, Spencer K. "Preparing for a National Weightlifting Championship: A Case Series." Digital Commons @ East Tennessee State University, 2018. https://dc.etsu.edu/etd/3435.
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The purpose of this thesis was to observe psychological, physiological, and performance changes to determine when two high-level weightlifters were peaked for a major competition. We addressed this purpose by conducting a two-part case study series with one USA international level female and one USA national level male weightlifter. Both athletes were considered to be peaked on competition day. The results support our hypothesis that jumping performance would be peaked on competition day corresponding with an increased recovery and decreased stress state. However, contrary to our hypothesis, each athlete exhibited small decreases in muscle size leading into the competition relative to baseline values. Further, changes in inflammatory markers were inconsistent for each athlete and were not reduced as hypothesized. Based on our findings, this investigation supports the use of overreaching and tapering for individual strength-power athletes providing insight into underlying psychological and physiological basis for observed changes in performance.
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Sharker, Saberul Islam. "Water Entry Impact Dynamics of Diving Birds." DigitalCommons@USU, 2017. https://digitalcommons.usu.edu/etd/6441.
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Some seabirds (such as Northern Gannets and Brown Boobies) can dive from heights as high as 30 m reaching speeds of up to 24 m/s as they impact the water surface. It is perceived that physical geometry, particularly of the beak, allows them to endure relatively high impact forces that could otherwise kill non-diving birds. Acceleration data from simplified models of diving birds agree with simulated data for one species (Northern Gannet), however, no reliable experimental data with real bird geometries exist for comparison purposes. This study utilizes eleven 3D printed diving birds (five plunge-diving, five surface-diving and one dipper) with embedded accelerometers to measure water-entry impact accelerations for impact velocities ranging between 4.4 - 23.2 m/s. Impact forces for all bird types are found to be comparable under similar impact conditions and well within the safe zone characterized by neck strength as found in recent studies. However, the time each bird requires to reach maximum impact acceleration and its effect represented here by the derivative of acceleration (i.e., jerk), is different based on its beak and head shape. We show that surface diving birds cannot dive at high speeds as the non-dimensional jerk experienced exceeds a safe limit estimated from human impact analysis, whereas those by plunge divers do not.
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Beudaert, Xavier. "Commande numérique ouverte : interpolation optimisée pour l'usinage 5 axes grande vitesse des surfaces complexes." Phd thesis, École normale supérieure de Cachan - ENS Cachan, 2013. http://tel.archives-ouvertes.fr/tel-00918816.
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Le processus de fabrication des pièces usinées arrive à maturité concernant la fabrication assistée par ordinateur et la maîtrise du procédé d'usinage. Aujourd'hui, les perspectives d'améliorations importantes sont liées à l'optimisation de la commande numérique et de ses interactions avec le reste du processus de fabrication. L'objectif de cette thèse est donc de maîtriser les briques de base de la commande numérique pour optimiser le processus d'usinage 5 axes grande vitesse des surfaces complexes. La création d'une commande numérique ouverte nécessite le développement des algorithmes qui transforment le programme d'usinage en consignes échantillonnées pour les axes de la machine. La première partie des travaux consiste à rendre la géométrie suffisamment continue notamment pour les trajets interpolés linéairement en 5 axes qui présentent des discontinuités en tangence. Ensuite, l'interpolation temporelle du trajet crée la trajectoire d'usinage respectant les contraintes cinématiques et en particulier le jerk de chacun des 5 axes de la machine. L'implémentation matérielle de ces algorithmes permet de piloter une machine d'usinage grande vitesse 5 axes avec une commande numérique ouverte. Ainsi, les verrous technologiques associés aux commandes numériques industrielles sont levés et la chaîne numérique est entièrement contrôlée de la CFAO jusqu'au déplacement des axes. La maîtrise complète de la commande numérique offre la possibilité de définir exactement le trajet d'usinage à partir de la CAO sans introduire les écarts géométriques inhérents aux formats de description standards. L'interpolation de la trajectoire d'usinage directement sur la surface à usiner améliore de manière significative la qualité et la productivité de l'usinage des surfaces complexes. La commande numérique PREMIUM-OpenCNC permet la validation expérimentale de ces travaux et ouvre de nombreuses autres voies d'amélioration du processus de fabrication.
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Reinert, Senia Smoot. "Enhancing Posturography Stabilization Analysis and Limits of Stability Assessment." University of Dayton / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1470227622.
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Patarot, Alexandre. "Inertial and radio positioning in challenging environments." Thesis, Evry, Institut national des télécommunications, 2015. http://www.theses.fr/2015TELE0014.
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Les systèmes de navigation par satellites permettent les applications de positionnement en extérieur, dont la navigation routière. Dans les environnements contraints, comme l'intérieur des bâtiments où ces signaux satellitaires sont dégradés, la continuité du service de positionnement est nécessaire. Les applications adaptées aux citoyens modernes avec leurs appareils nomades posent des contraintes fortes de mobilité, de coûts et de limitations des infrastructures existantes. Les larges possibilités de déplacements dans des environnements hétérogènes accroissent les difficultés. Un état de l'art alimenté par une décennie de travaux académiques et industriels présente un ensemble de technologies qui visent disponibilité et performance. L'accent porte ensuite sur les systèmes inertiels pédestres à bas coût, avec une première contribution permettant d'abandonner la détection de pas au profit d'une mobilité facilitée, mais reste limitée par la connaissance de la distance parcourue pendant une phase de calibration. Cette approche nouvelle est confrontée à celle classique au pied, puis éprouvée pour différents capteurs et piétons au travers d'expérimentations répétées en conditions réalistes. Une seconde contribution décline une constellation radio locale pour estimer la distance avec une infrastructure allégée à deux émetteurs. Elle s’inspire d’une conception satellitaire sur radio programmable pour faciliter sa compatibilité avec l’existant et explorer ses performances. Une surveillance du rapport signal à bruit inter-canal améliore la précision du positionnement. Le couplage de ces systèmes asynchrones et distribués est évalué en intérieur sur une plateforme automatiséeThe global navigation satellite systems allow outdoor positioning applications, including car navigation. In challenging environments, such as the buildings where satellite signals are mitigated, georeferenced points of interest or navigation applications require a continuity of the positioning service. The applications adapted to modern citizens and their mobile devices raise strong constraints on mobility, costs and limitations of the existing infrastructure. The wide variety of displacements in heterogeneous environments increases the challenge. A state of the art fed by a decade of academic and industrial works presents a set of technologies that target availability and performance. The emphasis follows on the low cost pedestrian inertial systems, with a first contribution allowing to give up the step detection for the benefit of an easier mobility, but remains limited to the knowledge of the distance traveled during a calibration phase. This new approach is compared with the classical foot-mounted approach, and then benchmarked with several sensors and pedestrians through repeated experiments in real conditions. A second contribution operates a local radio constellation to estimate the distance with a minimal infrastructure with two emitters. The signals and the algorithm are based on a reproduction of satellite systems to ease the compatibility but are implemented on a programmable radio to explore the performances. A monitoring of the difference of carrier to noise ratio between the radio channels improves the distance estimation. The hybridization of these distributed, asynchronous and multi-rates inertial and radio systems is evaluated indoor on a motorized platform
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Travis, Spencer Kyle, Satoshi Mizuguchi, Michael H. Stone, William A. Sands, and Caleb D. Bazyler. "Preparing for a National Weightlifting Championship: A Case Series." Digital Commons @ East Tennessee State University, 2019. https://dc.etsu.edu/etsu-works/5785.
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Preparing for a national weightlifting championship: A case series. J Strength Cond Res XX(X): 000–000, 2019—This study aimed to characterize psychological, physiological, and performance changes of a high-level female (24.5 years; 53.8 ± 0.3 kg; 155.4 cm) and male (25.8 years; 92.7 ± 1.2 kg; 189 cm) weightlifter over 28 weeks while preparing for a national championship. Body mass, hydration, psychological inventories, serum biomarkers, vastus lateralis muscle cross-sectional area (CSA), and squat jump (SJ) performance were assessed weekly beginning 11 weeks from the competition date. Weightlifting performance goals were met for the female athlete (actual total = 159 kg) but not for the male athlete (actual total = 292 kg). Reductions in vastus lateralis CSA possibly took place the week leading into competition for both athletes. Both athletes reported positive recovery-stress states on the day of competition relative to baseline values. Fluctuations between steroid hormone concentrations and inflammatory markers were unpredictable and inconsistent for both athletes throughout the training program. Unloaded SJ height and rate of force development were the highest on competition day for both athletes. Based on these findings, it is possible for high-level male and female weightlifters to achieve and maintain peak preparedness 3–4 days before competition following a 1-week overreach and 3-week exponential taper, where training volume-load is reduced by half and intensity maintained or slightly increased relative to pretaper values. Furthermore, the short recovery and stress scale and SJ testing seem to be useful tools for sport scientists and coaches when monitoring high-level weightlifters preparing for competition.
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Coutinho, Canuto Jânio. "Biomechanical online signature modeling applied to verification." Thesis, Evry, Institut national des télécommunications, 2014. http://www.theses.fr/2014TELE0026/document.
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Cette thèse porte sur la modélisation et vérification des signatures en ligne. La première partie a pour thème principal la modélisation biomécanique des mouvements de la main. Un modèle basé sur le critère de Minimum de Secousse (MS) a été choisi parmi plusieurs théories du contrôle moteur. Ensuite, le problème de la segmentation des trajectoires en traits qui correspondent au modèle cinématique choisi a été étudié, ce qui a conduit à la mise au point d'une méthode de segmentation itérative. Le choix du modèle et de la méthode de segmentation sont basé sur le compromis entre la qualité de reconstruction et la compression. Dans la deuxième partie, le modèle polynomial issu du critère de MS est volontairement dégradé. Les zéros non-Réels des polynômes sont jetés et les effets de cette dégradation sont étudiés dans une perspective de vérification biométrique. Cette dégradation est équivalente à la technique connue sous le nom d’Infinity Clipping, initialement appliqué à des signaux de parole. Pour les signatures en ligne, comme pour la parole, la préservation de l'information essentielle a été observée sur des tâches de vérification de signature. En fait, en utilisant seulement la distance de Levenshtein sur la représentation dégradée, un taux d'erreur comparable à ceux des méthodes plus élaborées a été obtenu. En outre, la représentation symbolique issue de l’Infinity Clipping permet d’établir une relation conceptuelle entre le nombre de segments obtenus par la segmentation itératif basée sur le MS et la complexité de Lempel-Ziv. Cette relation est potentiellement utile pour l'analyse des signatures en ligne et pour l’amélioration des systèmes de reconnaissanceThis thesis deals with the modelling and verification of online signatures. The first part has as main theme the biomechanical modelling of hand movements associated to the signing gesture. A model based on the Minimum Jerk (MJ) criterion was chosen amongst the several available motor control theories. Next, the problem of signature trajectory segmentation into strokes that better fit the chosen kinematic model is studied, leading to the development of an iterative segmentation method. Both the choice of the model and the segmentation method are strongly based on the tradeoff between reconstruction quality and compression. On the second part, the polynomial model provided by the MJ criterion is intentionally degraded. The non-Real zeroes of the polynomials are discarded and the effects of this degradation are studied from a biometric verification perspective. This degradation is equivalent to the signal processing technique known as Infinity Clipping, originally applied to speech signals. On signatures, as for speech, the preservation of essential information was observed on signature verification tasks. As a matter of fact, using only the Levenshtein distance over the infinitely clipped representation, verification error rates comparable to those of more elaborate methods were obtained. Furthermore, the symbolic representation yielded by the infinity clipping technique allows for a conceptual relationship between the number of polynomial segments obtained through the Minimum Jerk-Based iterative segmentation and the Lempel-Ziv complexity. This relationship is potentially useful for the analysis of online signature signals and the improvement of recognition systems
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Lysell, Roland. "Bo Georgii-Hemming, Träd. Ett försök till lacansk läsning av Walter Ljungquists berättelser, särskilt Jerk Dandelinsviten. (Skrifter utgivna av Litteraturvetenskapliga institutionen vid Uppsala universitet 33) Uppsala 1997." Uppsala : Svenska Litteratursällskapet, 1997. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-201033.
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Baux, François. "Étude portant sur la construction de la méthode en escalade de bloc chez des grimpeurs experts et de son étayage par l’introduction d’un artefact au sein d’un dispositif de formation." Thesis, La Réunion, 2019. http://www.theses.fr/2019LARE0035.
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Les capacités de l’athlète à déchiffrer un passage rapidement et à déterminer l’enchaînement des actions permettant de le réussir sont cruciales en escalade et constituent des objets de formation et d’entraînement majeurs. Cette thèse se propose d’étudier l’activité d’exploration de la méthode de grimpeurs experts en bloc et propose des modalités d’intervention destinées à développer ces capacités d’exploration. Cette étude s’inscrit dans un programme de recherche anthropoculturel (Bertone, 2011, Chaliès, 2012). Initialement orienté sur l’étude de la construction du sujet professionnel en formation, ce cadre emprunte ses principaux présupposés théoriques à la philosophie analytique de Wittgenstein (2004). Deux protocoles ont été menés. Le premier consistait à modéliser l’activité de construction de la méthode de grimpeurs experts sur un bloc inconnu en milieu naturel. Le second dispositif a été conçu à partir des avancées épistémiques du premier. Des mesures macroscopiques de la cinématique d’un grimpeur expert (JERK) métaphorisées par un entraineur-chercheur ont ainsi fait l’objet d’un travail collaboratif entre les deux acteurs dans le but de, 1) étayer l’activité exploratoire de l’athlète et 2) étayer l’activité d’observation d’un entraineur-chercheur. Les principaux résultats montrent que les grimpeurs effectuent deux types d’exploration. Le premier, à dominante macroscopique, permet d’identifier une architecture globale de la méthode. Le second, à dominante plus microscopique, correspond à l’identification de sensations fines synchroniquement à l’ascension. Cette exploration se révèle à la fois complexe à identifier-décrire pour le grimpeur (et pour un observateur) et centrale dans la construction de la méthode. Les acteurs signifient des perceptions sensorielles singulières indexées à des expériences antérieures, interprétées in situ. La dynamique globale des explorations prend des formes de type plurilemmatique au cours desquelles les options s’alternent et/ou se chevauchent, impliquant une exploration-interprétation permanente, quel que soit le niveau d’avancement de la méthode. Les résultats du second dispositif montrent l’étayage de l’activité du grimpeur lui permis d’échantillonner à grain fin des méthodes contre-intuitives et fécondes au prix d’une perturbation non rédhibitoire de son exploration. Plus précisément, l’étayage à l’aide d’un outil de type biomécanique destiné à offrir une description macroscopique de la fluidité du grimpeur (le JERK) a permis à l’athlète et au chercheur-formateur de réaliser un travail d’enquête collaboratif. Celui-ci s’est traduit par de nouvelles focalisations et discriminations dans l’activité du grimpeur, mais également par une modalité d’exploration microscopique délaissée ordinairementFor climbers, the abilities to quickly sight-read a problem and quickly determine the sequence of actions that enable you to solve this problem are crucial. These abilities constitute the main subjects of training and coaching courses. This thesis intends to study the activity of expert climbers’ beta exploration in bouldering, and offer intervention methods meant to develop these exploration abilities. This study is part of an anthropocultural research program (Bertone, 2011, Chaliès, 2012), originally focused on the construction of professionals in training courses. This theoretical framework is based on Wittgenstein’s analytic philosophy (2004). Two protocols were led. The first one involves modelling the climbing beta construction activity of expert climbers facing an unknown natural boulder problem in outside climbing conditions. The second dispositive was designed from the epistemic advances of the first one. Macroscopic measures of an expert climber cinematic were backed by a coach-researcher in order to elaborate a collaborative work between the two actors. The goals were 1) to support the athlete exploration activity, commonly known as route reading, and 2) to support the observation activity of a coach-researcher. The main results show that climbers perform two types of explorations. The first one is mainly macroscopic and enables to identify a global framework of the beta. The second one is mainly microscopic and corresponds to the identifications of acute sensations felt during the ascent. For the climber and the observer this exploration is both complex to identify and describe, and also the central part of the beta elaboration. The actors notify specific feeling perceptions relatives to their past experiences, which are interpreted in-situ. Multilemma characterise the global dynamic of the explorations. During them choices alternate and/or imbricate with each other requiring a permanent exploration-interpretation and this at any stage of the beta advancement. The results of the second protocol show that the support of the climber activity enables him to sample, at a fine grain level, fecund and counter-intuitive betas at the cost of a non-negligible perturbation of his exploration. More specifically, scaffolding using a biomechanical tool meant to provide a macroscopic description of the climber’s fluidity (the JERK) allowed the athlete and the researcher-trainer to carry out collaborative and investigative work. This work resulted in new focuses and discrimination within the climber’s activity but also in a, usually neglected, new microscopic exploration method
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Dreyer, Sonette. "An investigation into the immediate effect of patellar taping on knee control in patients with adult acquired hemiplegia due to stroke." Thesis, Stellenbosch : University of Stellenbosch, 2009. http://hdl.handle.net/10019.1/1671.
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Thesis (MScPhysio (Physiotherapy))--University of Stellenbosch, 2009.The ability to walk has been rated by stroke patients as one of the most important goals of their rehabilitation. Knee control is a key element in normal gait. Currently, treatment options aimed at improving poor knee control in stroke patients are often costly, need specialised equipment and have poor patient compliance. The purpose of the current study was to assess whether medial patellar taping could improve knee control in stroke patients. Gait speed, dynamic standing balance, knee alignment and whether the subjects experienced any subjective stabilising effect on the knee after taping were tested. Twenty subjects diagnosed with hemiplegia after a stroke served as their own controls in a repeated measures experimental study. Results indicated that dynamic standing balance as tested by the Step Test (p=0.063) and the Timed-up-and-go test (p=0.099) (Wilcoxon test) showed marginal improvement after taping. This improvement in dynamic standing balance may indicate that neuro-motor control and/or eccentric knee control had improved. There was no change in walking speed and knee alignment as tested by change in the Q-angle (Wilcoxon test). However, a decrease in the Q-angle correlated with an improvement in dynamic standing balance as tested by the Step Test (p=0.029) (Spearman‟s test). Participants with decreased Q-angles after taping possibly had better knee alignment and were more willing to accept weight on their affected leg indicating a change in quadriceps activation. No change in walking speed (p=0.351) (Wilcoxon test) before and after taping may indicate that there was no change in the magnitude of contraction and/or concentric activity in the quadriceps muscle. Thirty percent of the participants reported a subjective change in knee stability after taping. Subjective change did not, however, significantly correlate with either of the balance tests, walking speed or Q-angle measurements. The possibility that medial patellar taping may be useful in treating poor knee control in stroke patients during dynamic balance activities should be investigated further.
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Uffreduzzi, Alessio. "Strumentazione mediante sensori inerziali di test per la valutazione delle funzioni visuo-spaziali costruttive in età evolutiva: uno studio preliminare." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2017.
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L’obiettivo di questa tesi è quello di indagare la possibilità di strumentare mediante sensori inerziali indossabili alcuni test per la valutazione delle competenze visuo-costruttive: “Salvadanaio” (Posting Coins), “Invertire i pioli” (Turning Pegs) e “Laccio” (Threading Lace) della batteria Movement ABC. A tal fine si è valutata la possibilità di utilizzare parametri quantitativi utilizzati in analisi del movimento per la caratterizzazione della performance dell’arto superiore durante compiti che richiedono appunto abilità visuo-costruttive.
Hanno preso parte allo studio undici soggetti adulti giovani sani e quattro bambini con sviluppo tipico. Dopo aver posizionato i sensori inerziali sui polsi è stato richiesto ai soggetti di svolgere i test sopraelencati come da manuale di riferimento. Da questo studio preliminare, i parametri che sono risultati più rilevanti per la caratterizzazione delle abilità visuo-costruttive sono stati la complessità (misurata con la Multiscale Entropy) e la frequenza mediana, stimate sul segnale accelerometrico dell’arto che eseguiva l’esercizio. Questi parametri hanno mostrato, come atteso, un trend diverso tra soggetti adulti e quelli in età evolutiva. I risultati di questo studio potranno essere utilizzati come base di partenza per ulteriori sviluppi futuri.
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Marciszko, Fredrik. "Torque Sensor based Powertrain Control." Thesis, Linköping University, Department of Electrical Engineering, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2248.
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The transmission is probably the drivetrain component with the greatest impact on driveability of an automatic transmission equipped vehicle. Since the driver only has an indirect influence on the gear shift timing, except for situations like kick-down accelerations, it is desirable to improve shift quality as perceived by the driver. However, improving shift quality is a problem normally diametrically opposed to minimizing transmission clutch energy dissipation. The latter has a great impact on transmission lifetime, and has to be defined and taken into consideration along with the notion of shift quality. The main focus of this thesis is the modeling of a drivetrain of an automatic transmission vehicle, and the implementation in MatLab/Simulink, including the first to second gear upshift. The resulting plant based on the derived equations is validated using data from a test vehicle equipped with a torque sensor located at the transmission output shaft. The shaft torque is more or less proportional to the driveline jerk, and hence of great interest for control purposes. Control strategies are discussed and a PID controller structure is developed to control the first to second gear upshift, as opposed to the traditional open-loop upshift control. Furthermore, the proposed controller structure uses the transmission output torque and the differential speed of the engaging clutch as inputs, to control the clutch pressure and the engine output torque, respectively. The structure is unsophisticated and transparent compared to other approaches, but shows great theoretical results in terms of improved shift quality and decreased clutch wear.
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Frank, Rafael. "Silagem de grãos úmidos de milho na alimentação de frangos Label Rouge com suplementação de acidificante." Universidade Estadual do Oeste do Paraná, 2014. http://tede.unioeste.br:8080/tede/handle/tede/1572.
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The objective of this study was to determine the aerobic stability, centesimal composition and energy values and the amino acids digestibility of high moisture corn grain silage (HMCS), and evaluate the effect of HMCS inclusion in different levels in diets on performance and gut parameters of Label Rouge broilers. In Experiment 1, to determine the applicability of inoculants usage the growth of main microorganisms involved in fermentation of high moisture corn grain silage was evaluated among time periods, as well as aerobic stability when silages were made with or without the addition of inoculum Lactobacillus plantarum + Propionibacterium acidipropionici. Significant changes were observed for temperature and pH as a function of storage time and use of inoculum. For the population of fungi and entero-bacteria a significant decrease in function of the storage time was observed more expressive for silages in which the inoculum was applied. Changes in all populations of microorganisms studied as a function of storage time were observed. For the chemical composition differences were obtained for dry matter, neutral detergent fiber and acid detergent fiber, when we used silage additive and changes in the concentration of acid detergent fiber in function of the different storage times. Aerobic stability was of 156 hours for silage ensiled by 28 days, without significant difference for inoculation. When ensiled for 56 days, the silage inoculated presented greater stability (60 hours) when compared to no inoculant (32 hours). The high moisture grain corn silage with microbial inoculum based on Lactobacillus plantarum and Propionibacterium acidipropionici was able to reduce the population of fungi and enterobacteria. In Experiment 2, to determine the energy values of high moisture corn silage (HMCS), male broilers from 21 to 31 days old were used, averaging 765 ± 1.70 g. The experimental period lasted ten days, five of adaptation and five for collection. The HMCS replaced in 10, 20, 30 and 40% the reference ration (RR). The method of analysis was the total excreta collection for subsequent analysis of apparent metabolizable energy (AME) and AME corrected for nitrogen balance (AMEn) of HMCS. To determine the amino acid values, the technique of forced feeding was applied in 12 cecectomized Leghorn roosters, with average weight of 1912.10 ± 133.73 g. Six animals received HMCS and the other six were fasted. At the end of the excreta collection period, the essential amino acid profile was determined, as the true digestibility coefficients and the true digestible content of amino acids in HMCS. This food presented average values of 2283 kcal/kg of EMA and 2272 kcal/kg of AMEn, and these energy values were negatively influenced by the inclusion levels of HMCS. Cystine presented the lower digestibility coefficients while leucine and glutamine had the highest digestibility and digestible amino acids values. In Experiment 3, one thousand and two hundred Label Rouge chicks with an average initial weight of 41 ±0.55g were distributed in a completely randomized design, in a factorial 2x5 (with and without the addition of acidifying X 0, 25, 50, 75 and 100% of high-moisture corn grain silage - HMCS). The weight gain (WG), feed intake (FI) and feed conversion (F:G) were determined, beyond the intestinal morphometric analysis and microbiota, carcass yield and cuts. From 1-28 and 1-63 days there was a quadratic effect (P<0.05) of HMCS on FI and F:G. There was interaction (P<0.05) between the levels of HMCS and the addition of acidifying for carcass yield and cuts (wing and chest) and liver of females. Males presented interaction (P<0.05) between levels of HMCS and acidifying for carcass, drumstick, chest and fat. There was an interaction (P<0.05) between HMCS and the inclusion of acidifying in the counting of Lactobacillus and Clostridium at 28 days old and for Lactobacillus at 63 days old. At 28 days there was an interaction (P<0.05) between HMCS and the inclusion of acidifying for villi height. At 63 days there was and quadratic effect of HMCS and the acidifying for crypts, which presented higher diameter for treatments without acidifying. The results suggest that jerk chickens fed up to 50% of HMCS with acidifying had good carcass yield and cuts and had no damage on intestinal development
O objetivo deste trabalho foi determinar a estabilidade aeróbica, a composição bromatológica e energética e a digestibilidade de aminoácidos da silagem de grãos úmidos de milho (SGUM), além de avaliar o desempenho e parâmetros intestinais de frangos Label Rouge recebendo diferentes níveis de SGUM na alimentação. No Experimento 1, para determinar a aplicabilidade da utilização de inóculos, foi avaliado o crescimento dos principais microrganismos envolvidos na fermentação da SGUM ao longo do tempo, assim como a estabilidade aeróbia quando silagens foram confeccionadas com ou sem adição de inóculo Lactobacillus plantarum + Propionibacterium acidipropionici. Foram observadas alterações significativas para temperatura e pH em função de tempo de estocagem e utilização de inóculo. Para a população de fungos e enterobactérias foi observada redução significativa em função do tempo de armazenamento de forma mais expressiva para as silagens em que foi aplicado o inóculo. Observou-se alteração em todas as populações de microrganismos estudados em função do tempo de armazenamento. Para a composição química, foram obtidas diferenças para matéria seca, fibra em detergente neutro e fibra em detergente ácido, quando foi utilizado inoculante, e alterações na concentração de fibra em detergente ácido em função dos diferentes tempos de armazenagem. A estabilidade aeróbica foi de 156 horas para silagens ensiladas por 28 dias, sem diferença significativa para inoculação. Quando ensilada por 56 dias, a silagem inoculada apresentou maior estabilidade (60 horas) quando comparada à sem inoculante (32 horas). A ensilagem de grão úmido de milho com inóculo microbiano à base de Lactobacillus plantarum e Propionibacterium acidipropionici foi capaz de reduzir a população de fungos e enterobactérias. No Experimento 2, para a determinação dos valores energéticos da SGUM, foram utilizados frangos de corte machos, dos 21 aos 31dias de idade, com peso médio de 765 ± 1,70 g. O período experimental teve duração de dez dias, sendo cinco de adaptação e cinco de coleta. A SGUM substituiu em 10, 20, 30 e 40% uma ração referência (RR). O método de análise foi o de coleta total de excretas, para posterior análises de energia metabolizável aparente (EMA) e EMA corrigida pelo balanço de nitrogênio (EMAn) da SGUM. Para a determinação dos valores de aminoácidos, foi usada a técnica de alimentação forçada em 12 galos Leghorn cecectomizados, com peso médio de 1912,10 ±133,73g. Seis animais receberam a SGUM e os outros seis permaneceram em jejum. Ao final do período de coleta de excretas, foi determinado o perfil de aminoácidos essenciais, coeficientes de digestibilidade verdadeira e o conteúdo digestível verdadeiro dos aminoácidos no alimento. A SGUM apresentou valores médios de 2283 kcal/kg de EMA e 2272 kcal/kg de EMAn, sendo que os valores energéticos foram negativamente influenciados pelos níveis de inclusão da SGUM. A cistina apresentou o menor coeficiente de digestibilidade, enquanto que a leucina e a glutamina apresentaram os maiores coeficientes de digestibilidade e os valores de aminoácidos digestíveis. No Experimento 3, foram utilizados 1200 pintos da linhagem Label Rouge, com peso médio inicial de 41 ±0,55g, distribuídos em um delineamento inteiramente casualizado, em esquema fatorial 2x5, (com e sem acidificante X 0, 25, 50, 75 e 100% de silagem de grãos úmidos de milho - SGUM). Foram determinados o ganho de peso (GP), consumo de ração (CR), conversão alimentar (CA), além da análise morfométrica e de microbiota intestinal, rendimento de carcaça e de cortes. De 1 a 28 e de 1 a 63 dias, houve efeito quadrático (P<0,05) da SGUM sobre o CR e CA. Houve interação (P<0,05) entre os níveis de SGUM e a adição de acidificante para o rendimento de carcaça e de cortes (asa, peito) e fígado das fêmeas. Os machos apresentaram interação (P<0,05) entre os níveis de SGUM e o acidificante para carcaça, sobrecoxa, peito e gordura. Houve interação (P<0,05) da inclusão de SGUM e a adição ou não de acidificante para a contagem de Lactobacillus e Clostridium aos 28 dias de idade e Lactobacillus aos 63 dias de idade. Aos 28 dias, houve interação (P<0,05) entre os níveis de SGUM e a adição de acidificante para a altura dos vilos. Aos 63 dias, foi observado efeito quadrático da SGUM para o tratamento com acidificante e as criptas apresentaram maior diâmetro para o tratamento sem acidificante. Os resultados sugerem que frangos caipiras alimentados com até 50% de SGUM com acidificante apresentam boas características de carcaça e de cortes e não sofrem danos sobre os parâmetros intestinais
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UNO, Yoji, Takahiro KAGAWA, Shunta TOGO, 洋二 宇野, 高弘 香川, and 俊太 東郷. "歩行中の手先振動抑制に対する視覚情報の役割." 電子情報通信学会, 2012. https://search.ieice.org/.
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Jansson, Lovisa, and Amanda Nilsson. "Evaluation of Model-Based Design Using Rapid Control Prototyping on Forklifts." Thesis, Linköpings universitet, Reglerteknik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-158715.
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The purpose of this thesis is to evaluate Rapid Control Prototyping which is apart of the Model-Based Design concept that makes it possible to convenientlytest prototype control algorithms directly on the real system. The evaluation ishere done by designing two different controllers, a gain-scheduled P controllerand a linear Model Predictive Controller (mpc), for the lowering of the forks of aforklift.The two controllers are first tested in a simulation environment. The thesis con-tains two different simulation models: one physical where only minor parameteradjustments are done and one estimated black-box model. After evaluating thecontrollers in a simulation environment they are tested on a real forklift with areal-time target machine.The designed controllers have different strengths and weaknesses as one is non-linear and single variable, the P controller, and the other linear and multivariable,thempc. The P controller has a smooth movement in all situations without be-ing slow, unlike thempc. The disadvantage of the P controller compared to thempcis that there is no guarantee that the P controller will keep the speed limit,whereas thempcapproach gives such a guarantee.The better performance of the P controller outweighs the speed limit guaranteeand thus a conclusion is drawn that the nonlinearities of the system has a largereffect than the multivariable aspect. Also, another conclusion drawn is that work-ing with Model-Based Design and Rapid Control Prototyping makes it possibleto test many different ideas on a real forklift without spending a lot of time onimplementation.Syftet med detta examensarbete är att utvärdera Rapid Control Prototyping vil-ket är en del av modellbaserad utveckling som gör det möjligt att enkelt testamodeller av styralgoritmer direkt på det riktiga systemet. Utvärderingen är gjordgenom att testa två olika regulatorer, en P-regulator med parameterstyrning ochen linjär modelbaserad prediktionsregulator (mpc), för sänkningen av gafflarnapå en truck.De två regulatorerna testas först i en simuleringsmiljö. I arbetet används två olikasimuleringsmodeller: en fysikalisk där endast mindre parameterjusteringar görsoch en estimerad black-box modell. Efter att regulatorerna utvärderas i simule-ringsmiljön testas de även på en riktig truck med hjälp av automatisk kodgenere-ring och exekvering på en dedikerad hårdvaruplattform.De konstruerade regulatorerna har olika för- och nackdelar eftersom en är olinjäroch envariabel, P-regulatorn, och en är linjär men flervariabel,mpc:n. P-regulatornhar en mjuk rörelse i alla lägen utan att bli för långsam, till skillnad frånmpc:n.Nackdelen med P-regulatorn, jämfört medmpc:n är att det inte finns någon ga-ranti för att P-regulatorn håller hastighetsbegränsningen sommpc:n gör.P-regulatorns bättre prestanda överväger garantin om att hålla hastighetsbegräns-ningen och därför dras slutsatsen att olinjäriteterna i systemet överväger effekter-na av det faktum att det också är flervariabelt. En annan slutsats är att modell-baserad utveckling och Rapid Control Prototyping gör det möjligt att testa fleraolika idéer på en riktig gaffeltruck utan att spendera för mycket tid på implemen-tationen.
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Michaelson, Peter. "Sensorimotor characteristics in chronic neck pain : possible pathophysiological mechanisms and implications for rehabilitation." Doctoral thesis, Umeå : Univ, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-368.
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Valdifiori, Marika. "Strumentazione mediante sensori inerziali di test per la valutazione della funzione grafo-motoria in età evolutiva: studi preliminari." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2017.
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L'obiettivo di questa tesi è stato effettuare una valutazione preliminare sull'utilizzabilità dei sensori inerziali per la valutazione del movimento fine durante attività di coordinazione manuale. Lo scopo finale è valutare la possibilità di utilizzare parametri quantitativi utilizzati in analisi del movimento per la caratterizzazione della performance dell’arto superiore durante compiti che richiedono abilità grafo-motorie.
A questo scopo sono stati selezionati alcuni test che potessero fornire un quadro completo delle funzioni grafo-motorie tra quelli maggiormente utilizzati nella pratica clinica: il test DGMP (per la valutazione del livello di automatizzazione di qualità e di apprendimento della scrittura in corsivo) e i test Cycle Trail e Flower Trail, scelti fra la batteria di Test Movement ABC-2 (per la valutazione di destrezza manuale).
Hanno preso parte allo studio undici soggetti adulti giovani sani e quattro bambini con sviluppo tipico. Dopo aver posizionato i sensori inerziali sui polsi è stato richiesto ai soggetti di svolgere i test sopraelencati in diverse condizioni: "migliore" e "veloce", "lenta" e "veloce", mano destra e mano sinistra. Sono stati applicati gli indici (RMS accelerazione, RMS Jerk, MIJerk, IJerk, MSE) al segnale di accelerazione dell’arto che eseguiva l’esercizio ed è stato valutato se gli indici analizzati fossero in grado di distinguere diverse condizioni di esecuzione.
Da questo studio preliminare, i parametri utilizzati (RMS accelerazione, RMS Jerk, MIJerk, IJerk, MSE) hanno mostrato una specificità sufficiente nel distinguere le diverse condizione analizzate, supportando quindi sviluppi futuri per l’applicazione dei sensori inerziali per la valutazione oggettiva della coordinazione fine durante attività grafo-motorie.
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Liao, James Yu-Chang. "Evaluating Multi-Modal Brain-Computer Interfaces for Controlling Arm Movements Using a Simulator of Human Reaching." Case Western Reserve University School of Graduate Studies / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=case1404138858.
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de, Wit Tjaart Cornelis. "Wavelet analysis of geomagnetic jerks." Master's thesis, University of Cape Town, 2013. http://hdl.handle.net/11427/6620.
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Geomagnetic jerks, or secular variation impulses, are abrupt changes in the slope of the first time derivative of the Earth's magnetic field. These changes occur on time scales of the order of a year. It has been demonstrated that the jerks might be more singular than previously supposed; their """"regularity"""" is closer to 1.5 than to 2. Although discovered over 30 years ago, geomagnetic jerks remain poorly understood. Their origin probably lies in the magnetohydrodynamics that is responsible for the maintenance of the Earth's magnetic field produced within the Earth's liquid and convecting core (through a so-called geo-dynamo process). A wavelet tool was programmed in MATLAB and a wavelet analysis applied to detect and characterize singular events, or jerks, in the time series made of monthly mean values of the east component of the geomagnetic field from 45 selected worldwide observatories. The analysis was first performed on various synthetic series made up of a """"main"""" signal of smooth variation intervals separated by singular events, a white noise and an """"external"""" signal made up of the sum of a few harmonic signals. Conditions, in which the singular events could be clearly isolated and their associated """"regularities"""" recovered, are highlighted. Geomagnetic jerks were detected globally in 1969, 1978, 1991 and 1999. Furthermore, geomagnetic jerks are also thought to have also occurred in 1901, 1913 and 1925, but due to the small number of observatories with long enough records to allow for detection during this period, their extent is unclear. Two further geomagnetic jerks were found to have occurred around 1937 and 1952, but due to these events not being detected by all the observatories with records covering this period, these events might not be of the same extent or origin. The results of the geomagnetic jerks detected here and the phase jumps detected in the Chandler wobble are compared and the remarkable coincidence highlighted. The spatio-temporal behaviour of jerks, for example where jerks arrive in the northern hemisphere before the southern hemisphere, is explored. Using k-means clustering, an antipodal relationship is proposed between regional trends in the time delay in the detection of geomagnetic jerks at the surface of the Earth. It is possible that this finding may shed some new light on the origin of geomagnetic jerks. The wavelet analysis was also used to investigate whether the nature of geomagnetic jerks could be classified into one of the following three categories: geomagnetic jerks are the result of some instability starting at the time of the jerk; geomagnetic jerks are the result of some continuous oscillations; that geomagnetic jerks possibly reflect a process ending at the time of the jerk. A startling pattern emerged that suggested that the 1969 jerk corresponded to an event starting at that time, the 1978 jerk corresponding to an event ending at that time, and lastly an event again starting in 1990. This implied that the 1969 and 1978 jerks might have been the result of a common phenomenon starting in 1969 and ending almost a decade later in 1978.
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Herath, Shanaka, and Gunther Maier. "Informational efficiency of the real estate market: A meta-analysis." Hanyang Economic Research Institute, 2015. http://dx.doi.org/10.17256/jer.2015.20.2.001.
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The growing empirical literature testing informational efficiency of real estate markets uses data from various contexts and at different levels of aggregation. The results of these studies are mixed. We use a distinctive meta-analysis to examine whether some of these study characteristics and contexts lead to a significantly higher chance for identification of an efficient real estate market. The results generated through meta-regression suggest that use of stock market data and individual level data, rather than aggregate data, significantly improves the probability of a study concluding efficiency. Additionally, the findings neither provide support for the suspicion that the view of market efficiency has significantly changed over the years nor do they indicate a publication bias resulting from such a view. The statistical insignificance of other study characteristics suggests that the outcome concerning efficiency is a context-specific random manifestation for the most part. (authors' abstract)
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Cheatham, Robert M. "A Geometry-Based Motion Planner for Direct Machining and Control." BYU ScholarsArchive, 2007. https://scholarsarchive.byu.edu/etd/1411.
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Direct Machining And Control (DMAC) is a new method of controlling machine tools directly from process planning software. A motion planning module is developed for the DMAC system that operates directly off path geometry without pre-tessellation. The motion planner is developed with the intent to process Bezier curves. The motion planning module includes a deterministic predictor-corrector-type curve interpolator, a dynamics limiting module, and a two-pass jerk-limited speed profiling algorithm. The methods are verified by machining an automotive surface in a clay medium and evaluating the resultant machine dynamics, feed rate, and chordal error throughout the machining process.
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Travis, S. Kyle, Jacob R. Goodin, George K. Beckham, and Caleb D. Bazyler. "Identifying a Test to Monitor Weightlifting Performance in Competitive Male and Female Weightlifters." Digital Commons @ East Tennessee State University, 2018. https://dc.etsu.edu/etsu-works/3775.
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Monitoring tests are commonly used to assess weightlifter’s preparedness for competition. Although various monitoring tests have been used, it is not clear which test is the strongest indicator of weightlifting performance. Therefore, the purpose of this study was to (1) determine the relationships between vertical jump, isometric mid-thigh pull (IMTP) and weightlifting performance; and (2) compare vertical jumps to IMTP as monitoring tests of weightlifting performance in a large cohort of male and female weightlifters. Methods: Fifty-two competitive weightlifters (31 males, 21 females) participated in squat and countermovement jump testing (SJ, CMJ), and IMTP testing performed on force plates. All laboratory testing data was correlated to a recent competition where the athletes had attempted to peak. Results: Squat jump height (SJH) was the strongest correlate for men and women with the Sinclair Total (r = 0.686, p ≤ 0.01; r = 0.487, p ≤ 0.05, respectively) compared to countermovement jump height (r = 0.642, p ≤ 0.01; r = 0.413, p = 0.063), IMTP peak force allometrically scaled to body mass (r = 0.542, p ≤ 0.01; r = −0.044, p = 0.851) and rate of force development at 200 ms (r = 0.066, p = 0.723; r = 0.086, p = 0.711), respectively. Further, SJH was a stronger correlate of relative weightlifting performance compared to IMTP peak force in females (p = 0.042), but not male weightlifters (p = 0.191). Conclusions: Although CMJ and IMTP are still considered strong indicators of weightlifting performance, SJH appears to be the most indicative measure of weightlifting performance across a wide-range of performance levels. Thus, SJH can be used as a reliable measure to monitor weightlifting performance in male and female weightlifters.
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Espitia, Felicia Danielle. "Validation of Texas beef jerky processing." [College Station, Tex. : Texas A&M University, 2006. http://hdl.handle.net/1969.1/ETD-TAMU-1719.
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Patarot, Alexandre. "Inertial and radio positioning in challenging environments." Electronic Thesis or Diss., Evry, Institut national des télécommunications, 2015. http://www.theses.fr/2015TELE0014.
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Les systèmes de navigation par satellites permettent les applications de positionnement en extérieur, dont la navigation routière. Dans les environnements contraints, comme l'intérieur des bâtiments où ces signaux satellitaires sont dégradés, la continuité du service de positionnement est nécessaire. Les applications adaptées aux citoyens modernes avec leurs appareils nomades posent des contraintes fortes de mobilité, de coûts et de limitations des infrastructures existantes. Les larges possibilités de déplacements dans des environnements hétérogènes accroissent les difficultés. Un état de l'art alimenté par une décennie de travaux académiques et industriels présente un ensemble de technologies qui visent disponibilité et performance. L'accent porte ensuite sur les systèmes inertiels pédestres à bas coût, avec une première contribution permettant d'abandonner la détection de pas au profit d'une mobilité facilitée, mais reste limitée par la connaissance de la distance parcourue pendant une phase de calibration. Cette approche nouvelle est confrontée à celle classique au pied, puis éprouvée pour différents capteurs et piétons au travers d'expérimentations répétées en conditions réalistes. Une seconde contribution décline une constellation radio locale pour estimer la distance avec une infrastructure allégée à deux émetteurs. Elle s’inspire d’une conception satellitaire sur radio programmable pour faciliter sa compatibilité avec l’existant et explorer ses performances. Une surveillance du rapport signal à bruit inter-canal améliore la précision du positionnement. Le couplage de ces systèmes asynchrones et distribués est évalué en intérieur sur une plateforme automatiséeThe global navigation satellite systems allow outdoor positioning applications, including car navigation. In challenging environments, such as the buildings where satellite signals are mitigated, georeferenced points of interest or navigation applications require a continuity of the positioning service. The applications adapted to modern citizens and their mobile devices raise strong constraints on mobility, costs and limitations of the existing infrastructure. The wide variety of displacements in heterogeneous environments increases the challenge. A state of the art fed by a decade of academic and industrial works presents a set of technologies that target availability and performance. The emphasis follows on the low cost pedestrian inertial systems, with a first contribution allowing to give up the step detection for the benefit of an easier mobility, but remains limited to the knowledge of the distance traveled during a calibration phase. This new approach is compared with the classical foot-mounted approach, and then benchmarked with several sensors and pedestrians through repeated experiments in real conditions. A second contribution operates a local radio constellation to estimate the distance with a minimal infrastructure with two emitters. The signals and the algorithm are based on a reproduction of satellite systems to ease the compatibility but are implemented on a programmable radio to explore the performances. A monitoring of the difference of carrier to noise ratio between the radio channels improves the distance estimation. The hybridization of these distributed, asynchronous and multi-rates inertial and radio systems is evaluated indoor on a motorized platform
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Karlsen, Silje Sæther. "Effekter av metaller i laksesmolt : Hovedsakelig jern og kobber." Thesis, Norges Teknisk-Naturvitenskaplige Universitet, 2013. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-20993.
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Denne masteroppgaven ble skrevet etter ønske fra Nofima i Sunndalsøra. Oppgaven skal i første omgang omfatte hvordan tungmetaller, med hovedfokus på jern og kobber, påvirker laksesmolten. Tungmetallene aluminium, sink og mangan er også tatt med i resultat- og diskusjonsdelen. Disse fem metallene er plukket ut fordi de kan ha stor påvirkning på fiskehelsen, og Nofima ønsket å se om samspillet mellom jern og kobber påvirker smolten mer enn det er dokumentert.Utførelsen bygger på prøvetaking av brønnvannet som pumpes opp i fire tanker som forsyner fisketankene på anleggsområdet. Nofima er en landbasert forskningsstasjon på akvakultur, og har kontroll over hele livssyklusen til blant annet laks. Det ble tatt filtrerte- og ufiltrerte vannprøver hver dag uten helgene fra fire tanker, tre brønner og en fra en elv lokalisert ved brønnene. Prøveperioden varte fra 01.03.12 til 21.03.12. Parallelt med vannprøvene ble det målt temperatur, pH, redokspotensial og konduktivitet. I tillegg ble det tatt DOC-prøver, satt ut DGT og tatt faststoffprøver. Og når prøvetakingsperioden var over, ble fiskene som hadde gått i to ulike kar med forskjellig vannkvalitet prøvetatt, og sendt inn gjelleprøver til analyse. Slik kunne vannkvaliteten på de to typene vann sjekkes ut mot hverandre, og bli sammenlignet med tanke på fiskehelse.Det ble gjennomført to tilleggsprosjekter der to ulike typer biofilter som brukes i tankene på Nofima, ble sjekket med tanke på hvor mye metaller som lakk ut ved forandring av pH verdien.Resultatene indikerer forskjeller på de to vannkvalitetene, både med tanke på innhold av metaller, pH og redoksverdier. Noe som gjenspeiler seg i fiskeprøvene. Vannkvaliteten i de to ulike karene ga signifikante forskjeller på vekst og lengde til de to fiskegruppene. Visuelt ser man fra gjennomsnittene at det er høyere konsentrasjoner av jern i den minste fisken, men dette er kun tilfelle for jern og ikke for kobber, aluminium, sink og mangan. Noe som kan indikere en negativ påvirkning av jern for fiskehelsen. Om det har en sammenheng med konsentrasjonen av kobber er vanskelig å slå fast, men DOC prøvene viser at når konsentrasjonen av jern øker, øker også konsentrasjonen av kobber (svak korrelasjon). I tillegg viser vannprøvene at vannet som den største fisken gikk i inneholdt generelt mer kobber, men minst jern. Dette kan indikere et komplisert samspill mellom jern og kobber for fiskens helse men det må flere eksperimenter til for å fastslå noe. Både gjennomsnittlig jern og kobber ligger under grenseverdiene som er anbefalt for oppdrettsanleggene.
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Jers, Filip. "Så blev jag munspelare. Resan fram till Filip Jers Kvartett." Thesis, Kungl. Musikhögskolan, Institutionen för jazz, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kmh:diva-943.
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Oberholtzer, Ashlan S. "Development and Evaluation of a New Salmon Jerky Snack Product." Fogler Library, University of Maine, 2005. http://www.library.umaine.edu/theses/pdf/OberholtzerAS2005.pdf.
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Coradini, Marcia Goulart Lopes. "Ocorrência de Listeria monocytogenes em linha de processamento de Beef Jerky." Universidade Federal de Pelotas, 2015. http://repositorio.ufpel.edu.br:8080/handle/prefix/3085.
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Sem bolsa
A busca crescente dos consumidores por praticidade destaca-se dentre as principais tendências de consumo de alimentos no mundo. Neste contexto, enquadra-se o Beef Jerky, um produto cárneo produzido através de processo térmico, que não necessita de refrigeração no ponto de venda. Entretanto, por ser um alimento pronto para o consumo, deve-se garantir sua segurança e uma das bactérias patogênicas que, uma vez presente neste alimento, pode causar danos à saúde dos consumidores, é Listeria monocytogenes. O objetivo deste estudo foi avaliar a ocorrência de L. monocytogenes em uma linha de produção de Beef Jerky localizada no município de Bagé, Rio Grande do sul- Brasil. Foram realizadas sete coletas, nas quais se avaliaram 12 pontos ao longo da linha de processamento, dentre eles a matéria-prima, superfícies com e sem contato com o produto, bem como o produto final. As amostras foram analisadas no equipamento Mini Vidas® bioMérieux e, aquelas que apresentaram resultado positivo para L. monocytogenes, foram submetidas a PCR, utilizando-se o gene prs para confirmação de gênero, e os genes inlA, inlC e inJ para confirmação da espécie L. monocytogenes. A ocorrência global de L. monocytogenes foi de 7,14%, sendo 21,42% em superfícies sem contato com produto, 1,78% em superfícies de contato com produto, e 28,57% na matéria-prima, entretanto, não se identificou o patógeno no produto final. Observa-se que a matériaprima é uma importante fonte de contaminação e introdução de L. monocytogenes na indústria produtora de Beef Jerky e que a contaminação por esse microorganismo em superfícies de contato e sem contato com o alimento, reforça a importância dos programas de higienização como forma de evitar contaminação cruzada para o produto final. Entretanto, como o produto final (Beef Jerky) não apresentou contaminação por L. monocytogenes, as etapas do processo de produção que envolvem barreiras à multiplicação de patógenos e morte microbiana, podem ter sido efetivas no controle do patógeno.
The growing demand of consumers for convenience, stands out among the main trends in food consumption in the world. In this context is the beef jerky a meat product produced by thermal process that does not require refrigeration at the point of sale, ensuring practicality of use. However, being a food ready for consumption, should ensure its security and one pathogenic bacteria that, once present, can harm the health of consumers is Listeria monocytogenes. The objective of this research was to identify the occurrence of L. monocytogenes in a Beef Jerky production line located in the municipality of Bage, Rio Grande do Sul- Brazil. We evaluated 12 points along the processing line, including the raw materials, surfaces with and without contact with the product as well as the final product, in seven collections. Samples were analyzed in Mini Vidas® bioMérieux equipment and those that tested positive for L. monocytogenes, were subjected to PCR using the prs gene for gender confirmation and the inlA genes, inlC and inlJ to confirm the species L. monocytogenes. The overall occurrence of L. monocytogenes was 7.14% and 21.42% on surfaces without contact with product, 1.78% on product contact surfaces, and 28.57% in the raw material, however, it did not identify the pathogen in the final product. It is observed that the raw material is a major source of contamination and introduction of L. monocytogenes in producer Beef Jerky industry and the contamination by that micro-organism contact surfaces without contact with food, reinforces the importance of cleaning programs in order to avoid cross-contamination of the final product. However, since the final product (Beef Jerky) showed no contamination by L. monocytogenes, the steps of the production process involving barriers to multiplication of pathogens and microbial death, may have been effective in pathogen control.
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Kurevija, Mirna [Verfasser], Stefan [Akademischer Betreuer] Jeuk, Arne [Akademischer Betreuer] Wrobel, Stefan [Gutachter] Jeuk, and Arne [Gutachter] Wrobel. "Grammatik in Texten im Deutschunterricht (Deutsch als Zweitsprache und Deutsch als Fremdsprache) - ein internationaler Vergleich Deutschland - Kroatien / Mirna Kurevija ; Gutachter: Stefan Jeuk, Arne Wrobel ; Stefan Jeuk, Arne Wrobel." Ludwigsburg : Pädagogische Hochschule Ludwigsburg, 2019. http://d-nb.info/1201821827/34.
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Jeck, Sandra [Verfasser], and M. [Akademischer Betreuer] Kind. "Zum Phasengleichgewicht und Stofftransport in vernetzten Polymersystemen / Sandra Jeck ; Betreuer: M. Kind." Karlsruhe : KIT Scientific Publishing, 2012. http://d-nb.info/1184492468/34.
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Jerg, Marcus [Verfasser]. "Eine Analyse der Unternehmergesellschaft (haftungsbeschränkt) unter besonderer Berücksichtigung des Gläubigerschutzes / Marcus Jerg." Frankfurt : Peter Lang GmbH, Internationaler Verlag der Wissenschaften, 2013. http://d-nb.info/1042417741/34.
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Jeck, Jennifer [Verfasser]. "Bevacizumab bei Temozolomid refraktären malignen Gliomen: eine retrospektive unizentrische Analyse / Jennifer Jeck." Ulm : Universität Ulm, 2016. http://d-nb.info/1122195559/34.
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Bellanger, Éric. "Jerks géomagnétiques, rotation de la Terre et variations irrégulières du champ externe." Paris, Institut de physique du globe, 2002. http://www.theses.fr/2002GLOB0003.
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Grâce au travail des observateurs, nous avons accès à de longues séries de données géophysiques régulièrement échantillonnées (e. G. Paramètres de rotation de la Terre ou champ magnétique en un observatoire). Ces séries sont librement accéssibles depuis fort longtemps et cependant, il est encore possible, à l'aide de méthodes d'analyse de signaux parfois assez simples, d'en tirer de nouvelles informations. Ce manuscrit se décompose en deux parties principales. Dans la première partie, consacrée au lien entre les jerks (ou secousses) géomagnétiques et la rotation de la Terre, nous montrons que l'occurrence des jerks est corrélée avec celle de sauts de phase dans l'oscillation de Chandler. Un modèle cinématique de jerk nous permet de montrer que le couple nécessaire pour générer de tels sauts de phase est compatible avec les observations magnétiques. Une telle corrélation induit des contraintes fortes sur la dynamique du noyau et sur l'efficacité du couplage noyau-manteau. Dans la seconde partie, nous caractérisons l'agitation d'un signal à l'aide d'une méthode non-linéaire : la dérivée absolue moyenne. Cet outil, appliqué à la longueur du jour, permet de déterminer avec précision le coefficient de réponse zonale associé à la marée luni-solaire de période 13,63 jours. Appliqué aux séries magnétiques enregistrées dans une quarantaine d'observatoires répartis à la surface du globe, il permet d'étudier les caractéristiques des variations irrégulières du champ externe. Ce champ de variations se sépare en une fonction d'activité universelle et en un champ de vecteur immuable indiquant une géométrie essentiellement dipolaire associée à l'anneau de courant. Un chapitre est enfin consacré à l'étude de la préditibilité des orages magnétiques
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Nagao, Hiromichi. "Characteristics of geomagnetic jerks and their relation to lower mantle conductivity anomalies." 京都大学 (Kyoto University), 2002. http://hdl.handle.net/2433/149555.
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Santoro, Maurizio. "Estimation of biophysical parameters in boreal forests from ERS and JERS SAR interferometry." Göteborg : Dep. of Radio and Space Science, Chalmers Univ. of Technology, 2003. http://deposit.d-nb.de/cgi-bin/dokserv?idn=969498845.
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Andrade, Cláudia Oliveira de. "Construção e avaliação do Jogo Educativo sobre Registro de Enfermagem (JERE): estudo metodológico." Universidade Federal Fluminense, 2017. https://app.uff.br/riuff/handle/1/5887.
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Mestrado Profissional em Enfermagem Assistencial
Introdução: O registro é um instrumento de documentação do cuidado de enfermagem. No entanto, estudos têm comprovado que uma das maiores dificuldades na utilização do mesmo na prática cotidiana é a falta de conhecimento do uso do processo de enfermagem com sistemas de linguagens padronizadas. Torna-se necessário a construção de ferramentas de ensino-aprendizagem que facilitem a formação e a educação permanente de enfermeiros para a realização de um registro de enfermagem de qualidade. Jogos educativos exercitam a habilidade mental e a imaginação, portanto, podem oferecer uma oportunidade de desmistificação das dificuldades do uso do registro no dia a dia de enfermeiros. Este estudo teve como objetivo geral construir um jogo educativo direcionado ao ensino-aprendizagem de registro de enfermagem sob a ótica do processo de enfermagem com sistemas de linguagens padronizadas. E, como específicos, descrever as etapas da construção do jogo educativo sobre registro de enfermagem, e; avaliar o jogo educativo quanto aos objetivos, organização, estilo da escrita, a aparência e a motivação. Método: Estudo metodológico realizado em duas fases: desenvolvimento e avaliação do jogo. A elaboração do jogo teve a colaboração de duas designers e quatro pesquisadores/docentes do Grupo de Estudos em Sistematização da Assistência de Enfermagem da Universidade Federal Fluminense. Na segunda fase, foi realizada uma avaliação por enfermeiros e acadêmicos através de um questionário validado para uso no Brasil. Foram selecionados 14 juízes. Os dados foram organizados e analisados com auxílio do SPSS 20.0 e foi realizada análise descritiva. Resultados: Foi desenvolvido um jogo de tabuleiro com perguntas e respostas sobre registro de enfermagem, contendo dois dados, 20 cartas histórico de enfermagem, 20 cartas diagnóstico de enfermagem, 20 cartas intervenções de enfermagem e 20 cartas resultados de enfermagem. A identidade visual do jogo foi estabelecida através das iniciais J, E, R e E, que explicitam Jogo Educativo Registro de Enfermagem. Os avaliadores foram predominantemente do sexo feminino (71,4%), com média de idade de 26,4 anos, atuam em instituições públicas (57,1%), Destes (85,7%) possuem experiência prévia com sistematização da assistência de enfermagem e participam de grupos de pesquisa na área (71,4%). Dos 14 avaliadores, 50% consideraram o objetivo do jogo totalmente adequado, 57,1% afirmaram que o jogo ajuda durante o trabalho/ atividades cotidianas, porém 42,9% apontaram que o JERE está parcialmente adequado para ser utilizado pelo público-alvo. Conclusão: O JERE é relevante, pois poderão mediar práticas educativas em grupo, no intuito de tornar mais estimulantes o ensino-aprendizagem de diagnósticos, intervenções e resultados com sistemas de linguagens padronizadas, proporcionando a troca de saberes de acadêmicos de enfermagem e enfermeiros. Portanto, trará subsídios para inovação no ensino-aprendizagem do registro de enfermagem
Introduction: The registry is a documentation instrument for nursing care. However, studies have shown that one of the greatest difficulties in using it in everyday practice is the lack of knowledge of the use of the nursing process with standardized language systems. It is necessary to construct teaching-learning tools that facilitate the training and the permanent education of nurses to carry out a quality nursing record. Educational games exercise mental ability and imagination, therefore, can offer an opportunity to demystify the difficulties of using the registry in the day to day of nurses. The purpose of this study was to construct and evaluate an educational game directed to the teaching-learning of nursing record from the point of view of the nursing process with standardized language systems. And, as specific, carry out a search in the literature of scientific productions on the use of games in the teaching process nursing record learning; Develop the educational game for nursing record (JERE), and; Evaluate content and the appearance of JERE regarding the target audience, goals, organization, writing style and motivation. Method: A three-phase methodological study: the first was an integrative review of the literature in the databases online: PUBMED, BDENF and LILACS. In the second was built the game and its rules. To this end, two designers and four researchers / professors from GESAE_UFF collaborated, teaching or researching the systematization of nursing care. In the third phase an evaluation was made by nurses and academics about the appearance and content of the educational game through a questionnaire validated for use in Brazil. Sixteen judges were selected for evaluation of content and appearance. The data were organized and analyzed using SPSS 20.0 and a descriptive analysis was performed. RESULTS: Three studies were identified in the review, but after reading the titles and abstracts it was found that there were no duplications and 02 articles were excluded because they did not answer the question of the study. A board game was developed with questions and answers about nursing records, containing two data, 20 charts of nursing history, 20 letters of nursing diagnosis, 20 letters of nursing interventions and 20 letters of nursing results. The visual identity of the game was established through the initials J, E, R and E, Which explain the Educational Game Nursing Registry. The evaluators were predominantly female (71.4%), with an average age of 26.4 years, work in public institutions (57.1%), of which (85.7%) had prior experience with nurses and participated in research groups in the area (71.4%). Of the 14 evaluators, 50% considered the goal of the game to be totally adequate, 57.1% stated that the game helps during work / day-to-day activities, but 42.9% indicated that JERE is partially suitable for use by the target audience. Conclusion: JERE is relevant because it can mediate group educational practices in order to stimulate teaching and learning of diagnoses, interventions and results with standardized language systems, providing the exchange of knowledge of nursing academics and nurses. Therefore, it will provide subsidies for innovation in the teaching-learning of the nursing record
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Khurana, Sandeep K. Clarke Andrew Douglas. "Effect of different marinade treatments on survival and morphology of pathogens in beef jerky." Diss., Columbia, Mo. : University of Missouri--Columbia, 2009. http://hdl.handle.net/10355/5355.
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The entire thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file; a non-technical public abstract appears in the public.pdf file. Title from PDF of title page (University of Missouri--Columbia, viewed on December 29, 2009). Thesis advisor: Dr. Andrew D. Clarke. Includes bibliographical references.
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Arab, Mohammad-Waseem. "Étude et conception d'un groupe motopropulseur électrique à faibles niveau vibratoire et sonore pour véhicule électrique. Aspects "contrôle - commande"." Thesis, Paris 11, 2015. http://www.theses.fr/2015PA112231/document.
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Dans un contexte mondial régi par de multiples facteurs économiques, énergétiques et environnementaux, la transition vers des modes de transport à zéro émission polluante semble inévitable. De ce fait, les constructeurs automobiles s’investissent de plus en plus dans le développement de groupes motopropulseurs électriques afin d’anticiper les besoins du marché. Parmi les différentes technologies de machines électriques considérées pour cette application, la Machine à Réluctance Variable à Double Saillance (MRVDS) présente des caractéristiques très attractives pour le milieu industriel.Les travaux présentés dans cette thèse visent à élaborer des solutions qui répondent aux points qui bloquent encore l’adoption de la MRVDS dans les véhicules électriques. Dans un premier temps, la commande en couple d’une MRVDS destinée à la traction électrique est analysée. En prenant en considération les exigences imposées par l’application envisagée, une stratégie de commande en couple est développée en intégrant deux méthodes complémentaires sur le plan de fonctionnement de la MRVDS choisie.Dans la deuxième partie, l’asservissement en courant est abordé. Les problématiques du contrôle propres à la MRVDS à forte dynamique de courant sont d’abord identifiées. Ensuite, deux régulateurs de courant, qui répondent à différents conditions d’implantation, sont présentés et validés par simulation.La dernière partie de cette thèse aborde le problème des à-coups d’accélération induits à basse vitesse et de leurs répercussions sur l'agrément de conduite. En effet, ce type de motorisation électrique introduit un nouvel aspect sur cette problématique. Une loi de commande anti-à-coups, composée de deux actions, est développée. Les simulations ont montré la conformité de la performance obtenue en utilisant la loi de commande proposée avec le cahier des charges industriel viséIn a global context governed by multiple economic, energetic and environmental factors, the transition towards transportation modes with zero polluting emissions seems inevitable. Hence, automotive manufacturers are investing increasingly in the development of electric powertrains in anticipation of the market needs. Among the different electric motors technologies considered for this application, the switched reluctance motor (SRM) presents attractive characteristics for the industry.The work presented in this thesis aims to elaborate solutions in response to the points still hindering the adoption of the SRM in electric vehicles. First, torque regulation of an SRM intended for an electric traction is analyzed. Taking into consideration the requirements of the application in hand, a regulation strategy is developed through the integration of two methods which complement each other over the studied SRM range of operation.In the second part, the subject of current regulation in the SRM is discussed. The issues related to current regulation in SRMs disposing of high current dynamics are firstly identified. Then, two current regulators, each adapted to different implementation conditions, are presented and validated through simulations.The last part of this thesis discusses the acceleration jerks induced at very low speeds and their repercussions on driving comfort . Indeed, electric traction introduces a new aspect on this rather classic issue. An anti-jerk control law, composed of two control actions, is developed. Simulations have shown the conformity of the performance obtained with the proposed control law with the target industrial specifications
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Al-Mahri, Abdullah Khzam. "JERS-1 SAR and Landsat-5 TM image data fusion : an application approach for lithological mapping." Thesis, University College London (University of London), 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.419943.
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Galvani, Marco. "Optimal-Control-Based Adas for Driver Warning and Autonomous Intervention Using Manoeuvre Jerks for Risk Assessment." Doctoral thesis, Università degli studi di Trento, 2013. https://hdl.handle.net/11572/368952.
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In this research work, two ADAS have been proposed, both based on optimal control and manoeuvre jerks as parameters for threat assessment. The first is named “Codriver†, and is a system for driver warning. The second is a sort of completion of the first, since it is designed for autonomous vehicle intervention if the driver does not react to the warnings. The Codriver has been developed by the Mechatronics Group of the University of Trento, which the author is part of, in the framework of the European Project “interactIVe†, to warn the driver for all-around threats safety. It has been then implemented on a real vehicle of Centro Ricerche Fiat, which has been widely tested at the end of the project. On the other hand, for the second system only the main components have been developed by the author during a research period at the University of Tokyo, Japan, and its application is restricted to autonomous obstacle avoidance. In particular, a motion planning algorithm has been used together with a control loop de- signed to execute the planned trajectories.
Both systems exploit Optimal Control (OC) for motion planning: the Codriver uses OC to plan real-time ma- noeuvres with humanlike criteria, so that they can be compared to what the driver is doing in order to infer his/her intentions, and warn him if these are not safe; the second system uses OC instead to plan emergency manoeuvres, i.e. neglecting driver actuation limitations and pushing the vehicle towards its physical limits. The initial longitudinal and lateral jerks of the planned manoeuvres are used by both the systems as parameters for risk assessment. Manoeuvre jerks are proportional to pedal and steering wheel velocities, and their initial values thus describe the entity of the correction needed by the driver to achieve a given goal. Since human drivers plan and act with minimum jerk criteria, and are jerk-limited, more and more severe manoeuvres at a given point are not reachable anymore by a human driver, since they require too high initial jerks: initial jerks can be thus considered proportional to the risk level of current situation. For this reason, when the manoeuvres to handle current scenario require jerks beyond a given threshold, the Codriver outputs a warning. This threshold must be lower than driver limits, so that he/she will be able to react to the warning and still have the chance to perform a safe manoeuvre. When the required jerks exceed drivers’ actuation limits, the risk level raises to an upper step, where driver warning would be not effective and autonomous vehicle intervention should be enabled.
In obstacle avoidance scenarios, it was demonstrated during driving simulator tests that manoeuvre jerks are more robust parameters for risk assessment than for example time headways, since they are less affected by driver’s age and gender.