Dissertations / Theses: 'Strokes'

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Іваненко, В. Ю. "Software system for early diagnosis of strokes «Strokeml»." Thesis, ХНУРЕ, 2021. https://openarchive.nure.ua/handle/document/16155.

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Scientific supervisor of work – Iryna Leshchynska Candidate of Technical Sciences, Associate Professor of the Department of Software Engineering
The aim of the work is to develop a software system that allows the user to be tested, analyzes its results and provides the user with information about his susceptibility to stroke disease. The software system also aims to preserve the results of tests and provide recommendations for nutrition and healthy living.

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Dina, Isæus-Berlin. "Dealing With Strokes." Thesis, Konstfack, Institutionen för Konst (K), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:konstfack:diva-7730.

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Dina Isæus-Berlin is an abstract painter. The essay examines an artistic practice, its intentions, methods and connection to aikido. Aikido is shortly presented as are the artistic process - how a painting is made. The studio and the dojo are central places. Knowledge, spontaneity, control, resistance, failure and other principles that affect the individual progress within both aikido and painting are reflected upon.
Dina Isæus-Berlin är en abstrakt målare. Essän behandlar en konstnärlig praktik, dess intentioner, metoder och beröringspunkter med aikidon. Aikidon presenteras i korthet och likaså den konstnärliga processen, hur en målning blir till. Ateljén och dojon är centrala platser. Det reflekteras över kunskap, spontanitet, kontroll, motstånd och misslyckande liksom andra principer som påverkar den egna utvecklingen både inom aikidon och måleriet.

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Edwards, Diana. "More than brush strokes." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape7/PQDD_0015/NQ45669.pdf.

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Kapral, Moira Kassia. "Sex differences in surgical risk, an analysis of strokes after stroke prevention surgery." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0006/MQ40713.pdf.

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WILLIS, ELIZABETH ANN. "THINK F.A.S.T.: AN EDUCATIONAL REVIEW OF STROKES." Thesis, The University of Arizona, 2016. http://hdl.handle.net/10150/613787.

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Strokes are the fifth leading cause of death in the United States, killing on average 800,000 Americans annually.^29 An overview of the three main components of the cardiovascular system (the heart, the blood, and the blood components) will be established with an in-‐depth look at the cerebral vasculature to explain the physiological mechanism of a stroke. There are two main categories of stroke, both with distinct causes and treatments, although they both occur without prior warning. A summary of the causes, treatment, and prevention methods are listed for both types of strokes, with some overlap between the two. Finally, a community outreach portion is included, comprised of a lesson plan to teach elementary students about strokes and explaining why it is important to teach young children about science in general.

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Parker-Taillon, Dianne. "Effects of right hemisphere strokes on psychomotor performance." Thesis, University of Ottawa (Canada), 1989. http://hdl.handle.net/10393/5681.

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Johamming, Lars. "Hydrodynamic damping of cylinders at high strokes parameter." Thesis, Imperial College London, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.406308.

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Parkinson, Jim. "The temporal order of strokes primes letter recognition." Thesis, University of Sussex, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.444019.

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9

Heckman, Stan. "Why does a lightning flash have multiple strokes?" Thesis, Massachusetts Institute of Technology, 1992. http://hdl.handle.net/1721.1/17300.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1992.
Includes bibliographical references (p. 127-132) and index.
by Stan Heckman.
Ph.D.

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10

Zadel, Mark. "Graphical performance software in contexts: explorations with different strokes." Thesis, McGill University, 2013. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=114205.

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This thesis proposes a novel approach to musical software analysis that prescribes testing a given software interface in a wide variety of hardware contexts, each providing unique insights into its design. This work is situated in the general context of graphical software performance, which we define as musical performance through manipulating an on-screen software interface to create music. The analysis strategy is investigated using the Different Strokes (DS) performance environment as a specific example. A series of software extensions to DS were undertaken to extend the application to new hardware contexts and use cases. These include extensions for the use of Different Strokes in an interdisciplinary performance work, d_verse; the adaptation of DS to work on a large multi-touch surface; the integration of a force-feedback input device; and the integration of the libmapper framework, allowing it to be easily interconnected with alternative input and output devices. The thesis also presents a historical overview of graphical software intended for live use, and a background on general issues in interface design for this usage context. An exploratory user test was performed with the force-feedback setup where participants used DS in the presence of simulated physical forces. While there was no clear preference for any of the haptic effects, the different physical forces present are demonstrated to have gestural implications. These kinds of implications should be taken into account when designing mappings from gesture to sound, and in the overall interaction design.
Cette thèse propose une nouvelle stratégie d'analyse de logiciels pour la musique par l'utilisation d'interfaces graphiques dans divers contextes matériels informatiques. Notre travail s'inscrit dans la perspective globale de « graphical software performance » définie ici comme la manipulation d'interfaces utilisateur lors de performances musicales. La stratégie d'analyse que nous proposons a été explorée à partir de Different Strokes (DS), un logiciel conçu pour la création musicale. Pour permettre l'utilisation de DS dans plusieurs contextes matériels et contextes d'utilisation nouveaux, nous avons développé un ensemble d'extensions. Ces extensions ont été élaborées, entre autres, pour l'utilisation de DS dans la série de performances interdisciplinaires d_verse. Nous avons également adapté DS pour qu'il soit compatible avec une surface « multi-touch » de grande taille, nous y avons intégré une interface haptique, et nous y avons ajouté libmapper, une bibliothèque logicielle facilitant l'interconnectivité d'interfaces d'acquisition et de restitution. Cette thèse présente, en outre, un survol de l'histoire des logiciels graphiques conçus pour l'usage en direct et une discussion des problèmes liés à la conception d'interfaces utilisateur dans ce contexte précis d'utilisation. Un test exploratoire a été effectué avec le système haptique intégré à DS. Lors du test, les participants ont utilisé Different Strokes en présence de différentes forces physiques simulées. Bien que nous n'ayons pas observé de préférence claire pour l'un ou l'autre des effets haptiques, nous démontrons que les différentes forces physiques présentes influencent néanmoins la gestuelle. Nous concluons que leur influence doit être prise en considération dans la conception de mappings entre le geste et le son et dans la conception d'interaction en général.

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Коленко, Оксана Іванівна, Оксана Ивановна Коленко, and Oksana Ivanivna Kolenko. "Проблеми і перспективи надання допомоги хворим на ЦВХ в місті Сумах." Thesis, Вид-во СумДУ, 2007. http://essuir.sumdu.edu.ua/handle/123456789/5631.

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Аналіз стану надання допомоги мешканцям міста Сум довів, що більший відсоток хворих (75%) отримали саме стаціонарну допомогу, тобто лікування було надано з урахуванням етіології захворювання. Сумчанам зараз доступна візуалізаційна діагностика, завдяки впровадженню в місті декількох комп’ютерних томографів та дуплексних сканерів. При цитуванні документа, використовуйте посилання http://essuir.sumdu.edu.ua/handle/123456789/5631

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Borodenko, A. A., Ye I. Dubovyk, Вікторія Юріївна Гарбузова, Виктория Юрьевна Гарбузова, Viktoriia Yuriivna Harbuzova, Олександр Васильович Атаман, Александр Васильевич Атаман, and Oleksandr Vasylovych Ataman. "The frequency of THR83Ala polymorphism of MGP gene Exon 4 in patients with atherothrombotic stroke." Thesis, Сумський державний університет, 2013. http://essuir.sumdu.edu.ua/handle/123456789/32195.

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Abnormal calcium salts depositing in the arterial vessels is considered to be a novel marker of atherosclerosis and related to cerebrovascular disease. Matrix gamma-carboxyglutamic acid protein (MGP) is one of the most potent inhibitors of ectopic mineralization, so it may be associated with calcification of atheromatous plaques, their instability and rupture, and thrombi formation. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/32195

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Ковчун, А. В., and І.-М. С. Закорко. "Варіанти і динаміка м'язово-тонічних порушень при півкульному ішемічному інсульті." Thesis, Сумський державний університет, 2013. http://essuir.sumdu.edu.ua/handle/123456789/32948.

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Розлад довільних рухів є найбільш вагомою причиною, що обмежує незалежність постінсультних хворих в повсякденній життєдіяльності. За даними літератури, до кінця гострого періоду інсульту геміпарези спостерігаються у 80-90% хворих, що вижили. При цитуванні документа, використовуйте посилання http://essuir.sumdu.edu.ua/handle/123456789/32948

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Gibson, Maryika Ivanova. "Effective Strategies for Recognition and Treatment of In-Hospital Strokes." ScholarWorks, 2019. https://scholarworks.waldenu.edu/dissertations/6756.

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In-hospital onset strokes represent 4% to 20% of all reported strokes in the United States. The variability of treatment protocols and workflows as well as the complex etiology and multiple comorbidities of the in-hospital stroke subpopulation often result in unfavorable outcomes and higher mortality rates compared to those who experience strokes outside of the hospital setting. The purpose of this project was to conduct a systematic review to identify and summarize effective strategies and practices for prompt recognition and treatment of in-hospital strokes. The results of the literature review with leading-edge guidelines for stroke care were corelated to formulate recommendations at an organizational level for improving care delivery and workflow. Peer-reviewed publications and literature not controlled by publishers were analyzed. An appraisal of 24 articles was conducted, using the guide for classification of level of evidence by Fineout-Overholt, Melnyk, Stillwell, and Williamson. The results of this systematic review revealed that the most effective strategies and practices for prompt recognition and treatment of in-hospital strokes included: staff education, creating a dedicated responder team, analysis and improvement of internal processes to shorten the time from discovery to diagnosis, and offering appropriate evidence-based treatments according to acute stroke guidelines. Creating organizational protocols and quality metrics to promote timely and evidence-based care for in-hospital strokes may result in a positive social change by eliminating the existing care disparities between community and in-hospital strokes and improving the health outcomes of this subpopulation of strokes.

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15

Hauryliuk, Vasili. "A Few Strokes to the Family Portrait of Translational GTPases." Doctoral thesis, Uppsala University, Department of Cell and Molecular Biology, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-8844.

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Protein biosynthesis is a core process in all living organisms. Assembly of the protein chain from aminoacids is catalysed by the ribosome, ancient and extremely complex macromolecular machine. Several different classes of accessory molecules are involved in translation, and one set of them, called translational GTPases (trGTPases), was in the focus of this work.

In this thesis properties of two trGTPases– EF-G and eRF3 - were studied by means of direct biochemical experiments. EF-G is a bacterial trGTPase involved in two steps of translation: translocation and ribosomal recycling. Translocation is a process of the ribosomal movement along the mRNA, and recycling as the step when upon completion of the protein ribosome is released from the mRNA via splitting in two ribosomal subunits. We found that off the ribosome EF-G has similar affinities to GDP and GTP, and thus given the predominance of the latter in the cell, EF-G should be present mostly in the complex with GTP. However, binding to the ribosome increases factors affinity to GTP drastically, ensuring that it is in the GTP-bound state. GDP can not promote neither translocation, not recycling, and GDPNP can not promote recycling. It can, however, promote translocation, but in so doing it results in an intermediate ribosomal state and translocation process can be reversed by addition of GDP, which is not the case for the EF-G•GTP-catalyzed reaction.

The second trGTPase we investigated is eukaryotic termination factor eRF3. This protein together with another factor, eRF1, is involved translation termination, which is release of the synthesized protein from the ribosome. We demonstrateed, that eRF3 alone has basically no propensity to bind GTP and thus resides in the GDP-bound state. Complex formation between eRF1 and eRF3 promotes GTP binding by the latter, resulting in the formation of the ternary complex eRF1•eRF3•GTP, which in turn is catalyzing the termination event.

Experimental investigations of trGTPases where rationalized within a generalized thermodynamical framework, accommoding the existent experimental observations, both structural and biochemical.

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Shah, Suryakumar. "Strokes and transient ischaemia : admissions, incidence, rehabilitation, and global outcomes." Thesis, Teesside University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.518729.

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17

Damian, Maxwell Simon, Andreas Hertel, Peter Seibel, Heinz Reichmann, Georg Bachmann, Walter Schachenmayr, Gustav Hoer, and Wolfgang Dorndorf. "Follow-Up in Carriers of the ‘MELAS’ Mutation without Strokes." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-133386.

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Eight carriers of the A3243G mutation of mitochondrial DNA without stroke-like episodes were monitored for up to 7 years in clinical and metabolic studies, by magnetic resonance imaging (MRI) and positron emission tomography (PET). None developed mitochondrial encephalopathy (MELAS), but 2 developed diabetes mellitus, 1 terminal kidney failure and 2 cardiomyopathy. One patient improved markedly under ubiquinone. Electroencephalography showed progressive slowing in 2 cases, but electrophysiological tests and MRI were otherwise noncontributary. PET showed widespread cortical and basal ganglion metabolic deficits in 6 cases. We conclude that internal medical complications are more common than MELAS in adult carriers of the mutation. PET findings, firstly reported in such patients, suggest that chronic subclinical encephalopathy is very frequent, and PET may play a role in monitoring in the future
Dieser Beitrag ist mit Zustimmung des Rechteinhabers aufgrund einer (DFG-geförderten) Allianz- bzw. Nationallizenz frei zugänglich

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Damian, Maxwell Simon, Andreas Hertel, Peter Seibel, Heinz Reichmann, Georg Bachmann, Walter Schachenmayr, Gustav Hoer, and Wolfgang Dorndorf. "Follow-Up in Carriers of the ‘MELAS’ Mutation without Strokes." Karger, 1998. https://tud.qucosa.de/id/qucosa%3A26458.

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Eight carriers of the A3243G mutation of mitochondrial DNA without stroke-like episodes were monitored for up to 7 years in clinical and metabolic studies, by magnetic resonance imaging (MRI) and positron emission tomography (PET). None developed mitochondrial encephalopathy (MELAS), but 2 developed diabetes mellitus, 1 terminal kidney failure and 2 cardiomyopathy. One patient improved markedly under ubiquinone. Electroencephalography showed progressive slowing in 2 cases, but electrophysiological tests and MRI were otherwise noncontributary. PET showed widespread cortical and basal ganglion metabolic deficits in 6 cases. We conclude that internal medical complications are more common than MELAS in adult carriers of the mutation. PET findings, firstly reported in such patients, suggest that chronic subclinical encephalopathy is very frequent, and PET may play a role in monitoring in the future.
Dieser Beitrag ist mit Zustimmung des Rechteinhabers aufgrund einer (DFG-geförderten) Allianz- bzw. Nationallizenz frei zugänglich.

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19

Jones, Hannah F., and L. Lee Glenn. "Group Size Limitations and Causes of Strokes in the Young." Digital Commons @ East Tennessee State University, 2013. https://dc.etsu.edu/etsu-works/7468.

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Excerpt: The recent study by Tiamkao et al 1 that was published in the Journal of Stroke and Cerebrovascular Diseases concluded that “Stroke in the young generally has a favorable outcome” and that “factors associated with a nonfavorable outcome of stroke in the young were cardiac abnormalities and alcohol intake.” However, this conclusion is not supported by the data in their study because of a slight misinterpretation of the data and limitations of the study, as explained subsequently.

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Bible, Stewart Andrew. "Study of the 'Poor Man's Navier Strokes' equation turbulence model." Lexington, Ky. : [University of Kentucky Libraries], 2003. http://lib.uky.edu/ETD/ukymeen2003t00104/Thesis.pdf.

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Thesis--University of Kentucky (M.S.), 2003.
Title from document title page. Document formatted into pages; contains ix, 110 p. : ill. Includes abstract and vita. Includes bibliographical references (p. 99-109).

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Challoner, Teresa. "Serial venesection : clinical, haemorheological and haematological sequelae." Thesis, University of Aberdeen, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.327829.

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Haematocrit in the high normal, as well as the pathological, range may be a risk factor for the development of stroke. As stroke is one of the most important causes of physical handicap attempts to reduce its incidence further are justified. Repeated small volume venesection without volume replacement is a simple method of haematocrit reduction which could be used in a controlled trial if shown to be safe and practicable. Forty three male patients (33 evaluable) with haematocrit above 0.46 without primary proliferative or secondary polycythaemia, were entered into an open study to assess the clinical, haemorheological and haematological sequelae of serial venesection. Haematocrit was reduced from a median of 0.49 to 0.385 which necessitated removal of 2.75 1 of blood (range 1.5 - 4.25 1). This resulted in a marked reduction in blood viscosity which correlated significantly with the change in haematocrit. Although haematocrit has been postulated to affect blood pressure through an effect on blood viscosity and hence peripheral resistance, no clinically significant reduction in blood pressure was observed. Despite producing a slight reactive thrombocytosis, serial venesection was not shown to increase thrombogenic activity. Bleeding time was prolonged significantly and there was a trend for a reduction in platelet adhesion. The reduction in platelet adhesion correlated significantly with the reduction in haematocrit. Maintenance of haematocrit below 0.45 necessitated further venesection on average once every 2 months during follow-up for one year. Two patients with a previous history suffered further strokes which were considered unlikely to be related to venesection. One patient had worsening of angina and 2 patients experienced intermittent palpitations when haematocrit was reduced to 0.40; these events were considered possibly due to an increase in cardiac output as a consequence of lowered haematocrit. Except in patients with cardiac disease, repeated small volume venesection without volume replacement is a safe and practicable method of reducing haematocrit.

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Perkins, Jeremy Michael Towers. "Changing cerebrovascular reactivity in occlusive carotid artery disease." Thesis, University of Bristol, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.245525.

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McIntosh, Robert D. "Unilateral neglect : visual and manual." Thesis, Glasgow Caledonian University, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.287857.

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Khan, Mahtab Ahmad [Verfasser]. "Mechanisms of ischemic brain damage in hyperglycemic strokes / Mahtab Ahmad Khan." Lübeck : Zentrale Hochschulbibliothek Lübeck, 2015. http://d-nb.info/107910500X/34.

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Zhang, Zhiqing. "Biomechanical analysis and model development applied to table tennis forehand strokes." Thesis, Loughborough University, 2017. https://dspace.lboro.ac.uk/2134/24902.

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Table tennis playing involves complex spatial movement of the racket and human body. It takes much effort for the novice players to better mimic expert players. The evaluation of motion patterns during table tennis training, which is usually achieved by coaches, is important for novice trainees to improve faster. However, traditional coaching relies heavily on coaches qualitative observation and subjective evaluation. While past literature shows considerable potential in applying biomechanical analysis and classification for motion pattern assessment to improve novice table tennis players, little published work was found on table tennis biomechanics. To attempt to overcome the problems and fill the gaps, this research aims to quantify the movement of table tennis strokes, to identify the motion pattern differences between experts and novices, and to develop a model for automatic evaluation of the motion quality for an individual. Firstly, a novel method for comprehensive quantification and measurement of the kinematic motion of racket and human body is proposed. In addition, a novel method based on racket centre velocity profile is proposed to segment and normalize the motion data. Secondly, a controlled experiment was conducted to collect motion data of expert and novice players during forehand strokes. Statistical analysis was performed to determine the motion differences between the expert and the novice groups. The experts exhibited significantly different motion patterns with faster racket centre velocity and smaller racket plane angle, different standing posture and joint angular velocity, etc. Lastly, a support vector machine (SVM) classification technique was employed to build a model for motion pattern evaluation. The model development was based on experimental data with different feature selection methods and SVM kernels to achieve the best performance (F1 score) through cross-validated and Nelder-Mead method. Results showed that the SVM classification model exhibited good performance with an average model performance above 90% in distinguishing the stroke motion between expert and novice players. This research helps to better understand the biomechanical mechanisms of table tennis strokes, which will ultimately aid the improvement of novice players. The phase segmentation and normalization methods for table tennis strokes are novel, unambiguous and straightforward to apply. The quantitative comparison identified the comprehensive differences in motion between experts and novice players for racket and human body in continuous phase time, which is a novel contribution. The proposed classification model shows potential in the application of SVM to table tennis biomechanics and can be exploited for automatic coaching.

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Shrewsbury-Gee, Joanne. "An investigation of compounds of potential value in experimental cerebral ischaemia." Thesis, University of Manchester, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.329110.

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Quick, Mason G., and E. Philip Krider. "Optical power and energy radiated by return strokes in rocket-triggered lightning." AMER GEOPHYSICAL UNION, 2017. http://hdl.handle.net/10150/626272.

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The broadband optical radiation covering the visible and near-infrared (VNIR) spectral regions (0.4-1.0 mu m) has been measured from 70 negative return strokes (RS) in rocket-triggered lightning; 17 events were recorded in 2011, and 53 were recorded in 2012. The radiometers were calibrated, and all measurements were time-correlated with currents measured at the channel base. The risetime and peak of an irradiance waveform are determined primarily by the RS current and by the geometrical growth and total length of channel that is in the field of view of the sensor. Following an initial peak, the irradiance decays faster than the current until there is a plateau or secondary maximum 20 to 40 mu s (median of 22 mu s) after the peak current, a time when the current itself is steadily decreasing. Estimates of the space-and time-average optical power per unit length (l(o)) that is emitted at the source during onset of RS have been computed using the measured slopes of 70 irradiance waveforms together with an assumption that the initial speed of propagation is 1.2 x 10(8) m/s. The values range from 0.25 to 9.5 MW/m, with a mean and standard deviation of 2.4 +/- 1.7 MW/m, and they are in good agreement with prior estimates of l(o) that were made by Quick and Krider (2013) for the subsequent return strokes in natural lightning that reilluminate a preexisting channel. The values of l(o) also agree with numerical estimates of the VNIR power per unit length that were computed by Paxton et al. (1986). Estimates of the peak optical power per unit length (l(R)) that is radiated at the source have been derived from the peaks of 53 irradiance waveforms, and the values range from 0.4 to 11 MW/m with a mean and standard deviation of 4.2 +/- 2.5 MW/m. Both l(o) and l(R) are approximately proportional to the square of the peak current at the channel base. Estimates of the total optical energy per unit length, J(o), that is radiated in the VNIR have been computed by integrating the irradiance waveforms over 2 ms. The values of J(o) have a mean and standard deviation of 150 +/- 140 J/m, and they are proportional to the total charge that is transported to ground in that interval. Plain Language Summary In order to understand the energy distribution of a lightning return stroke, we have built a set of radiometers to measure the power and energy emitted in the visible and near-infrared wavelengths by lightning triggered with a rocket and trailing wire. By recording the emitted power with a high time resolution of 100 ns, we are able to resolve the light impulse created by a lightning return stroke and compare it to the current impulse measured at the channel base. We find that rocket-triggered lightning has comparable power and energy to some natural lighting and that correlations exist between the current that traverses the channel and the light that is emitted by the channel.

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Hall, Betty Lou. "Rating of perceived exertion of four swimming strokes at a constant intensity /." View online, 1989. http://repository.eiu.edu/theses/docs/32211998880350.pdf.

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BARRETO, ARTHUR ANDRE LETO. "SIMULATION OF THERMAL EFFICIENCY AT TWO STROKES PROPULSION ENGINES UNDER TRANSIENT TORQUE." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2009. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=14547@1.

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PETRÓLEO BRASILEIRO S. A.
Atualmente o motor diesel é a propulsão básica utilizada por navios mercantes. Predominantemente o arranjo mais utilizado é o de um motor de dois tempos turboalimentado diretamente acoplado ao hélice. Estes motores são controlados por um regulador de velocidade onde um valor desejado da rotação é ajustado. O regulador opera acionando as réguas das bombas injetoras, movendo-as conforme a necessidade de manter a rotação desejada mesmo sob torque transiente. Se o rendimento térmico é reduzido, os índices das bombas injetoras terão que operar em valores mais altos, quando comparado ao funcionamento do motor com o rendimento térmico de projeto, e neste caso maior geração de fuligem deverá ocorrer. Em motores de combustão interna, a deposição de fuligem trás consequências à manutenção e eficiência do motor, e por isto os operadores possuem motivos para evitar este tipo de mecanismo. Este trabalho propõe um modelo termodinâmico dotado de sub modelo para regulador de velocidade e para a fluturação do torque, o que permite observar o rendimento térmico nas condições de transiência. Dados adquiridos por um sistema de aquisição de dados fornece as condições de contorno para ajustar o modelo proposto.
The marine diesel engine is today’s predominant prime mover for ships propulsion. For the modern merchant vessels, the arrangement of a single slow speed turbocharged two stroke diesel engine directly coupled is used. The task of control these engines are done by speed governors, where a fixed rotational speed is set. The governor works holding the adjusted value even under transient loads, moving the fuel pump rack when necessary. When vessel operates in harsh weather conditions, the propellers may be subjected to large thrust and torque fluctuations. These fluctuations are generated by the propeller periodic change of submergence condition which leads to ventilation (air suction) and partial or full propeller emergence, at same time the rudder action to keep the route introduce another torque fluctuation. Thus, propulsion turbocharged two strokes engines runs under transient load could run with low fuel/air ratio, once the turbocharger can not be able to cover this transient range with appropriate response time. Some models from literature, like control and thermodynamics models are examined and adjusted with sub models for transient torque simulation. One thermodynamic model dotted of sub models for governor, and transient load is proposed and the thermal efficiency under transient torque observed. Data from monitored vessel’s engine under operation, supplied the boundaries conditions to adjust the proposed model.

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Censullo, Alex. "Estimating the Relative Value of Individual Strokes Gained on the PGA Tour." Scholarship @ Claremont, 2017. http://scholarship.claremont.edu/cmc_theses/1695.

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This study compares the predictive ability of newly introduced strokes gained measures on PGA Tour earnings performance with that of more conventional golf statistics. It is found that the strokes gained measures explain slightly more of the variability in the distribution of earnings. Strokes gained on the approach shot are determined to be the most valuable relative to the other strokes gained metrics.

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31

Williams, Benjamin Kane. "A biomechanical evaluation of squash skill and shot accuracy in different strokes." Thesis, University of Sydney, 2020. https://hdl.handle.net/2123/23521.

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A fundamental skill within squash is the ability to hit the ball accurately using different strokes. Understanding the technique differences between player skill levels and the kinematics that determine shot accuracy could assist the construction of skill development programs. The purpose of this thesis was to advance the understanding and assessment of squash skill and shot accuracy in different strokes. A squash skills test was found to be a valid method of assessing the accuracy and skill of players when compared to match performance. Subsequently, this test was used to determine player skill level and assess shot accuracy within this thesis. A 3D kinematic analysis of forehand (FH) drive, volley and drop shots revealed that highly-skilled players utilised greater forearm pronation/supination range-of-motion and wrist extension angles at impact which resulted in a faster speed and less open racket angle at impact than less-skilled players. Further, during FH drive shots, highly-skilled players displayed a superior ability to adjust their technique in a functional manner to achieve more consistent task-relevant parameters than less-skilled players. An investigation into the ability of a magnetic-inertial measurement unit (MIMU) to estimate racket orientation angles indicated that it was an accurate and reliable method when compared to a gold standard system. Consequently, the MIMU was used to determine differences between accurate and inaccurate FH and backhand (BH) drive, volley and drop shots. Inaccurate BH drop shots had less racket roll angle than accurate shots and there was greater variability in racket angles during inaccurate FH drop and BH drive shots compared to accurate shots, highlighting how racket orientation angles can influence shot accuracy. In order to improve squash skill and shot accuracy, players should develop swing mechanics that allow for varying initial conditions so that appropriate racket orientations are consistently achieved at impact.

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Knechel, Nancy Alice. "The relationships between sleep disturbance and falls among Veterans who have experienced strokes." Thesis, Yale University, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10012503.

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Falls result in more than 2.4 million injuries each year and are the most common adverse events after a stroke. Sleep disturbance is common after stroke and may be a risk factor for falls. The purpose of this study was to determine the predictive value of sleep disturbance for falls among Veterans who experienced ischemic strokes. The study was a secondary analysis of the data from the Diagnosis and Treatment of Sleep Apnea in Cerebrovascular Disease (GoToSleep) Study, a longitudinal multi-site randomized controlled strategy trial. The sample included 187 post-stroke Veterans, with a mean age of 70 years, which was predominately male (96.8%) and White (81.3%). The mean Charlson Comorbidity Index score was 2.5, and mean number of comorbid conditions was 6.3. The sample did not have significant stroke-related disability (NIHSS M= 1.9), or physical dependence (Modified Rankin Scale M = 1.0) Data included PSG, medical record review, questionnaires (Epworth Sleepiness Scale, Berlin, Saint Louis University Mental Status), and self-reported falls and injuries. Seventy-two participants had CPAP treatment. Univariate frequency distributions with summary statistics for central tendency and variability, t-tests, Chi-square tests, Fisher's Exact tests, Pearson correlations, and binary and multivariate logistic regression analyses were conducted. Fallers had shorter sleep duration, more frequent awakenings, longer time in bed, more N1 sleep, more spontaneous arousals and respiratory-event related arousals (RERAs), and Periodic Limb Movements (PLMs) per hour than non-fallers. Only the associations between frequency of awakenings per hour and PLM index and falls remained statistically significant in the fully adjusted multivariate model that accounted for approximately 13% of variance beyond the clinical and demographic variables. The odds of a fall increased by 40% for each awakening and 2% for each PLM per hour. After controlling for use of continuous positive airway pressure (CPAP) treatment among the patients with significant sleep apnea, the effects of the sleep variables were not statistically significant. This suggests that treatment of sleep disordered breathing may reduce the odds of falling. Future research is needed to improve confirm and extend these findings, understand the biobehavioral mechanisms for these relationships, and to evaluate the effects of sleep treatment on falls risk.

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Hoffmann, Nico, Georg Drache, Edmund Koch, Gerald Steiner, Matthias Kirsch, and Uwe Petersohn. "Quantification and Classification of Cortical Perfusion during Ischemic Strokes by Intraoperative Thermal Imaging." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2018. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-230833.

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Thermal imaging is a non-invasive and marker-free approach for intraoperative measurements of small temperature variations. In this work, we demonstrate the abilities of active dynamic thermal imaging for analysis of tissue perfusion state in case of cerebral ischemia. For this purpose, a NaCl irrigation is applied to the exposed cortex during hemicraniectomy. The cortical temperature changes are measured by a thermal imaging system and the thermal signal is recognized by a novel machine learning framework. Subsequent tissue heating is then approximated by a double exponential function to estimate tissue temperature decay constants. These constants allow us to characterize tissue with respect to its dynamic thermal properties. Using a Gaussian mixture model we show the correlation of these estimated parameters with infarct demarcations of post-operative CT. This novel scheme yields a standardized representation of cortical thermodynamic properties and might guide further research regarding specific intraoperative diagnostics.

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Hoffmann, Nico, Georg Drache, Edmund Koch, Gerald Steiner, Matthias Kirsch, and Uwe Petersohn. "Quantification and Classification of Cortical Perfusion during Ischemic Strokes by Intraoperative Thermal Imaging." Technische Universität Dresden, 2016. https://tud.qucosa.de/id/qucosa%3A30658.

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Thermal imaging is a non-invasive and marker-free approach for intraoperative measurements of small temperature variations. In this work, we demonstrate the abilities of active dynamic thermal imaging for analysis of tissue perfusion state in case of cerebral ischemia. For this purpose, a NaCl irrigation is applied to the exposed cortex during hemicraniectomy. The cortical temperature changes are measured by a thermal imaging system and the thermal signal is recognized by a novel machine learning framework. Subsequent tissue heating is then approximated by a double exponential function to estimate tissue temperature decay constants. These constants allow us to characterize tissue with respect to its dynamic thermal properties. Using a Gaussian mixture model we show the correlation of these estimated parameters with infarct demarcations of post-operative CT. This novel scheme yields a standardized representation of cortical thermodynamic properties and might guide further research regarding specific intraoperative diagnostics.

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Head, Kathryn. "The design and evaluation of a valid dysphagia screening tool for acute stroke patients." Thesis, University of South Wales, 2010. https://pure.southwales.ac.uk/en/studentthesis/the-design-and-evaluation-of-a-valid-dysphagia-screening-tool-for-acute-stroke-patients(7248d017-b54f-4f87-9fe4-6fb563b17533).html.

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Screening acute stroke patients for dysphagia (difficulty swallowing) is recommended within 24 hours due to risks of morbidity and mortality. A review of the international literature identified no universal consensus for a valid method of screening. This thesis describes a multi-method Action Research (AR) programme of study focused on the design, development and evaluation of a reliable and valid dysphagia screening tool (the ‘Head Dysphagia Screen for Stroke’ or HeDSS) for use by Registered General Nurses (RGNs). As a component of the assessment phase of the AR programme, a survey of dysphagia screening practices in England and Wales highlighted widely varied screening practices. Many of these practices were based on limited research evidence, reflecting the lack of consensus for valid dysphagia screening criteria reported in the literature. The design phase of the AR programme involved the development of the HeDSS tool, which centred on the use of research-based screening criteria. Focus group activity determined nurses’ perceptions of the design and subsequent refinement of the HeDSS tool. The intervention and evaluation phases of the AR programme followed three empirical stages. Stage one established the inter-rater reliability of the Speech and Language Therapist Researcher’s (SLTR’s) clinical dysphagia assessment, which acted as a reference standard against which the validity of the HeDSS tool was to be measured. Clinical judgements for the presence and absence of dysphagia in the same 30 referred patients were compared between the SLTR and a Speech and Language Therapist (SLT) of equivalent experience. Inter-rater reliability was substantial (k = .71). The second empirical stage established inter-rater reliability of the HeDSS measurement outcomes (indicative signs of dysphagia and appropriateness of referral for SLT clinical dysphagia assessment) when employed by two RGNs compared against the SLTR when screening two samples of 20 acute stroke patients. Rater agreement was substantial (k = .71 and k = .79, for detection of signs of dysphagia and k = .79 and k = .87 for appropriateness of referral). The final empirical stage evaluated the concurrent validity of the HeDSS tool measurement outcomes when employed by a second sample of two RGNs compared with the SLTR’s clinical dysphagia assessment outcomes in a sample of 100 acute stroke patients. The HeDSS tool measurement outcomes correlated highly with the clinical dysphagia assessment outcomes (sensitivity .88 - .96 and specificity .85 - .88 for detection of dysphagia; sensitivity .90 - .96 and specificity .84 - .88 for determining patients appropriate for assessment). Correlation coefficient measures confirmed high concurrent validity for the HeDSS tool (Phi ranged between .76 - .82). This study is the first in the UK to establish a reliable and valid dysphagia screening tool for use with acute stroke patients and has significantly advanced the professional knowledge base within this domain of practice. It is recommended that a multi-centred programme of research be undertaken to replicate this study with a larger nurse and patient sample.

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36

Vanhook, Patricia M. "State Stroke Systems of Care-Tennessee." Digital Commons @ East Tennessee State University, 2007. https://dc.etsu.edu/etsu-works/7449.

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37

Vanhook, Patricia M. "The Importance of Research in Stroke Centers." Digital Commons @ East Tennessee State University, 2007. https://dc.etsu.edu/etsu-works/7450.

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38

Tickel, James. "Temporal Brush Strokes: Aspects of Temporality and Musical Narrative in Grisey’s Partiels and Talea." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1492782264976939.

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39

Rochoux, Mélanie Catherine. "Vers une meilleure prévision de la propagation d'incendies de forêt : évaluation de modèles et assimilation de données." Thesis, Châtenay-Malabry, Ecole centrale de Paris, 2014. http://www.theses.fr/2014ECAP0009/document.

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La prévision des incendies de forêt reste un défi puisque vitesse et direction de propagation dépendent des interactions multi-échelles entre la végétation, la topographie du terrain et les conditions météorologiques. Un modèle à l’échelle régionale peut donc difficilement prendre en compte le détail des processus physiques mis en jeu. Toute modélisation est entachée de nombreuses incertitudes (modélisation incomplète, méconnaissance du terrain, de la végétation et des interactions flamme/atmosphère, etc.) qu’il est nécessaire de quantifier et de corriger. Ces travaux de thèse proposent ainsi une modélisation régionale des incendies qui a des meilleures capacités de simulation et prévision, basée sur une évaluation des modèles et l’assimilation de données. L’évaluation de modèles a consisté à développer des simulations multi-physiques à l’échelle de la flamme, incluant la résolution des équations de Navier-Stokes réactives, l’évaluation du transfert radiatif vers la végétation, la construction d’un modèle de pyrolyse de la végétation ainsi que la modélisation de l’interface flamme/végétation afin de mieux comprendre la dynamique des incendies. La seconde approche proposée a consisté à mettre en place un prototype d’assimilation de données pour le suivi de la propagation du front de feu. L’idée est de rectifier la trajectoire simulée du front au fur et à mesure que de nouvelles observations sont mises à disposition, la différence entre les positions observées et simulées du front étant traduite en une correction des paramètres de vitesse de propagation ou directement de la position du front via l’algorithme du filtre de Kalman d’ensemble. Ces approches, tenant compte des incertitudes à la fois sur la modélisation des incendies et sur les observations disponibles, permettent ainsi d’améliorer la prévision de la dynamique des feux ainsi que des émissions atmosphériques, ce qui constitue un enjeu de taille pour la protection civile et environnementale
Because wildfires feature complex multi-physics occurring at multiple scales, our ability to accurately simulate their behavior at large regional scales remains limited. The mathematical models proposed to simulate wildfire spread are currently limited because of their inability to cover the entire range of relevant scales, because also of knowledge gaps and/or inaccuracies in the description of the physics as well as inaccuracies in the description of the controlling input parameters (i.e., the vegetation, topographical and meteorological properties). For this purpose, the uncertainty in regional-scale wildfire spread modeling must be quantified and reduced. In this context, the goals of this thesis are two-fold. First, multi-physics detailed simulations of fire propagation, solving for the flame structure using Navier-Stokes equations for multi-species reacting flow and including radiation heat transfer, biomass pyrolysis as well as a flame/vegetation interface, were performed at the flame scale. These simulations were compared to measurements to provide a comprehensive understanding of the mechanisms underlying fire propagation. Second, the use of a data-driven simulator that sequentially integrates remote sensing measurements and relies on an empirical spread model was explored for regional-scale fire front tracking. The idea underlying this data assimilation strategy was to translate the differences in the observed and simulated fire front locations into a correction of the input parameters of the empirical model or directly of the fire front location via the ensemble Kalman filter algorithm. Since these two approaches account for uncertainties in fire spread modeling and measurements, they improve our ability to forecast wildfire dynamics and plume emissions. These challenges have been identified as a valuable research objective with direct applications in fire emergency response for civil defense and environmental protection

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40

Tegos, Thomas Ioannis. "The identification of the unstable carotid plaque on ultrasound." Thesis, Imperial College London, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.367735.

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41

Vanhook, Patricia M. "The Domains of Stroke Recovery: A Synopsis of the Literature." Digital Commons @ East Tennessee State University, 2009. https://dc.etsu.edu/etsu-works/7452.

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Stroke is a leading cause of serious long-term disability in the United States. The neurological insult following a stroke may leave the survivor with a chronic illness encompassing a lifetime of recovery. Recovery for the stroke survivor entails more than the return of function. A synopsis of the literature indicates that there are three domains of stroke recovery: physical, psychological, and social. There are six categories that comprise the three domains: cognition, function, health perception, self-concept, relationships, and role change. Stroke is a multifaceted and complex disease. Individual aspects of stroke recovery do not occur in isolation and cannot be separated from one another. In the future, studies involving the integration of the domains of stroke recovery are needed to understand the interactive processes that support recovery.

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42

Vanhook, Patricia M., and Tracey Richmond. "Inside Case Management: Postacute Levels of Care for Stroke Survivors: A Tool for Referral." Digital Commons @ East Tennessee State University, 2008. https://dc.etsu.edu/etsu-works/7453.

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43

Vanhook, Patricia M. "Reintegration and Rehabilitation of Women Stroke Survivors." Digital Commons @ East Tennessee State University, 2008. https://dc.etsu.edu/etsu-works/7443.

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44

Vanhook, Patricia M. "Impact of Stroke on Rural Women." Digital Commons @ East Tennessee State University, 2009. https://dc.etsu.edu/etsu-works/7442.

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45

Brislin, Claire. ""His Strokes Rhyme Couplets Now" the "Prismatic light" of impressionist poetry in Walcott's Tiepolo's Hound /." Diss., Connect to the thesis, 2007. http://hdl.handle.net/10066/987.

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46

YU, Ting-Yin, and 余庭鄞. "Order of strokes assessment study Order of strokes assessment study stroke order assessment study for characteristic of stroke." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/34159228287180598660.

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碩士
國立臺中教育大學
教育測驗統計研究所
97
In recent years, due to the boom in China’s economy, the desire to learn Chinese is spreading all over the world. As a result, Chinese has become the first choice when choosing a new language to learn. This trend has made an impact on the ways in which Chinese Characters are taught. Because of constant improvements in technology, digital online assessment and teaching has become of central importance to educators. The purpose of this research is, by using an online stroke order assessment, to discuss the teaching of stroke order of Chinese Character in today’s elementary schools. Also, to analyze the difficulty of identifying stroke problems in a traditional paper-pen based character writing test. Moreover, to provide prompt feedback of the assessment and enable the teachers and the students to know the situation of stroke order writing and false stroke order writing habits. This assessment research not only analyzes the wrong orders of basic stokes in characters, but also sets up the characteristic stroke structures, using characteristic strokes to analyze and discuss elementary school students’ stroke writing order. Refer to the《Manual of Stroke Order of Frequently Used Chinese Characters》(Minister of Education, 1996) as the basis for the assessment of stroke orders. In accordance with the 17 kinds of basic stroke rules in the manual, 42 kinds of characteristic stroke order rules are derived as reference standard in this research assessment. This research studies sixth-grade students in an elementary school in Taichung city with stroke order pre-test and formal testing. According to the result of the pre-test, it examines whether the assessment system in this research achieves the expected effect. It also uses the results of the pre-test to make an appropriate adjustment to the setup of vocabulary and the stroke order rules. Followed by a formal test, a comparative analysis is made on the characteristic stroke orders. An investigation of the results analyzes the features of stroke order, the students’ false writing habits and clarifies the cause of the students’ wrong stroke writing problems.

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47

Wolin, Aaron David. "Segmenting Hand-Drawn Strokes." Thesis, 2010. http://hdl.handle.net/1969.1/ETD-TAMU-2010-05-7869.

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Pen-based interfaces utilize sketch recognition so users can create and interact with complex, graphical systems via drawn input. In order for people to freely draw within these systems, users' drawing styles should not be constrained. The low-level techniques involved with sketch recognition must then be perfected, because poor low-level accuracy can impair a user's interaction experience. Corner finding, also known as stroke segmentation, is one of the first steps to free-form sketch recognition. Corner finding breaks a drawn stroke into a set of primitive symbols such as lines, arcs, and circles, so that the original stoke data can be transformed into a more machine-friendly format. By working with sketched primitives, drawn objects can then be described in a visual language, noting what primitive shapes have been drawn and the shapes? geometric relationships to each other. We present three new corner finding techniques that improve segmentation accuracy. Our first technique, MergeCF, is a multi-primitive segmenter that splits drawn strokes into primitive lines and arcs. MergeCF eliminates extraneous primitives by merging them with their neighboring segments. Our second technique, ShortStraw, works with polyline-only data. Polyline segments are important since many domains use simple polyline symbols formed with squares, triangles, and arrows. Our ShortStraw algorithm is simple to implement, yet more powerful than previous polyline work in the corner finding literature. Lastly, we demonstrate how a combination technique can be used to pull the best corner finding results from multiple segmentation algorithms. This combination segmenter utilizes the best corners found from other segmentation techniques, eliminating many false negatives (missed primitive segmentations) from the final, low-level results. We will present the implementation and results from our new segmentation techniques, showing how they perform better than related work in the corner finding field. We will also discuss limitations of each technique, how we have sought to overcome those limitations, and where we believe the sketch recognition subfield of corner finding is headed.

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48

Lin, Yu-Chen, and 林佑臻. "User-Guided Abstraction of Image Strokes." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/78431115077816185519.

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碩士
國立清華大學
資訊工程學系
101
How to let user draw as an artist is always a difficult problem in Non-Photorealistic Rendering field. Several researches on image abstraction had proposed many algorithms, but most of them need to provide different parameters with respect to different images. In this study, we present a system that let the user join the creation of painting just like the artists do in real world. There are four stages in our system. First two stages are preprocessing and the other two are interactive processing. In the first stage, we apply Different-of-Gaussian (DoG) filter to source image. Then vectorize the image as the associated internal representation. Different DoG results with different parameters were used to build a database for further reference. In the third stage, we calculate matching weight from database when the strokes user drew. And in the final stage, the closest edges from the database were extracted and put into the final canvas. Our system is very intuitive and easy to use for novice user. User can draw stylish painting with a few strokes in short time.

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Lu, Yu-Hao, and 盧又豪. "Flow Strokes Transition in Oriental Paintings Animation." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/84463165060946655247.

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碩士
國立臺灣科技大學
資訊工程系
102
Rivers and falls are important elements in oriental paintings. They are generally drawn with ink-dispersion strokes to express surface sprays, smooth water lines, and coherent diffusion. However, it is not trivial to simultaneously consider flow physics and animate temporally and spatially consistent strokes among consecutive frames. This study designs a data-driven system to animate the strokes in an existing oriental painting. Our system extracts an initial flow pattern by analyzing the structure, placement density, and ink density of strokes and automatically computes a flow field according to water boundaries and obstacles in the water as well as the pattern. The computation is based on solving the Naiver-Stokes equations. At the same time, its painting style is also extracted as patterns of strokes with their location, oscillation style, brush pattern, and ink density. Finally, the extracted strokes are dynamically generated and animated with the constructed field with controllable smoothness and temporal coherence. Furthermore, our system can also use the extracted painting styles to animate the water flow of another oriental painting.

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Lu, Tzu-Hsiu, and 呂子修. "Use inertial sensor for counting crawl strokes." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/08418021044240828847.

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碩士
淡江大學
資訊工程學系碩士班
103
In the field of swimming motion analysis, the number of strokes in a single trip is an important parameter. This parameter can be used to infer the speed of swimming, stroke rate, distance per stroke, and swim efficiency. However, we found that the current arts for analyzing need expensive equipment and cannot be used when training. In this paper, we propose an algorithm for calculating the number strokes of front crawl by wearable inertial devices. Our approach can be divided into two phases. The first one is the sensory data processing phase. In this phase, we gather the inertial sensory values, filter noises, and find feature points. The second phase is the stroke dividing phase. In this phase, we adopt the concept of correlation coefficient concept to judge if the collected linear acceleration values have similar tendencies and then to accumulate strokes. We implement our design on an Android platform. The experiment results indicate that the proposed scheme can precisely dividing sensory values into strokes and calculate number of strokes.

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Dissertations / Theses on the topic 'Strokes'

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