Academic literature on the topic 'Post CVA'
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Journal articles on the topic "Post CVA":
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Sharma, Shweta, and Kamli Prakash. "Effect of Teaching Programme regarding Home Care on Knowledge and Practice of Informal Caregivers of CVA Patients in a Selected Hospital in Dehradun (Uttarakhand)." Nursing Journal of India CVII, no. 03 (2016): 139–43. http://dx.doi.org/10.48029/nji.2016.cvii301.
Abstract:
Objectives of the study were to determine the effectiveness of a teaching programme regarding home care of CVA patients on knowledge and practice of informal caregivers, to find association between pre-test knowledge and practice scores of informal caregivers with their selected demographic variables, and to find correlation between post-test knowledge score and post-test practice score of informal caregivers of CVA patients. Quantitative research approach and pre-experimental one group pre-test and post-test design was adopted. Total sample were 45 informal caregivers of CVA patients; purposive sampling technique was used. The findings showed the mean of pre-test knowledge score of 13.24 and mean of post-test knowledge score as 25.96 with calculated ‘t’ value 28.96, which was more than tabulated ‘t’ value at p
2
Drexler, MS, LRT/CTRS, Karen. "Case history: Use of the Nintendo Wii to increase fine motor dexterity post cerebral vascular accident." American Journal of Recreation Therapy 8, no. 3 (July 1, 2009): 41–46. http://dx.doi.org/10.5055/ajrt.2009.0020.
Abstract:
Use of the low cost commercially available gaming console (Nintendo Wii) is a current trend in the rehabilitation environment. Released in 2006 by Nintendo, Veterans Affairs Medical Centers across the country are just setting one, Wii is being used as a physical, social, and cognitive tool. This case report seeks to provide evidence of its use as a rehabilitation tool for individuals who have experienced a recent stroke. By using whole body movements, the Wii sports games help in both gross motor and fine motor skills as well as in hand–eye coordination. This case study involves an older adult who is recovering from a cerebral vascular accident (CVA) and how using the Wii bowling game assisted to increase his fine motor strength and dexterity. CVA or stroke also called a “brain attack” can affect various parts of the brain. There are various signs and symptoms of CVA and these vary in each individual. Some of the signs that an individual having CVA shows are: sudden numbness or weakness of the face, arm or leg (especially on one side of the body), sudden confusion, trouble speaking, or understanding speech, sudden trouble seeing in one or both eyes, sudden trouble walking, dizziness, loss of balance or coordination, sudden severe headache with no known cause. This case study involved an older adult who experienced a CVA involving hemorrhage in the right cerebellum as revealed in a CT scan. This CVA affected the right hand of this individual. Hemorrhagic stroke occurs when a blood vessel in the brain ruptures. This lets blood to spill into nearby brain tissue, which damages the cells. Some brain cells die because their normal blood supply is cut off. Certified Therapeutic Recreation Specialist and Author of this case article utilized the Salisbury Veterans Affairs Medical Center Recreational Therapy initial intake assessment and discovered per patient’s report that he had decreased strength and fine motor dexterity in the fingers of his right hand status post CVA. This patient reported that after his stroke, he was not able to hold a utensil in his right hand. This case study speaks the use of the Nintendo Wii in assisting patient to regain use of the fingers of the hand that was affected by the CVA. This article can provide information for other Certified Therapeutic Recreation Specialists as to the use of the Nintendo Wii™ as a treatment modality. This device can demonstrate outcomes of improving fine motor dexterity for those who are recovering from a CVA.
3
Habot, Beno, H. Rabinovitz, Julie B. Friedman, J. Schwartz, and Theodore H. Tulchinsky. "Sexual Function among Male Hemiparetic Post-CVA Patients." Journal of the American Geriatrics Society 37, no. 10 (October 1989): 1003–4. http://dx.doi.org/10.1111/j.1532-5415.1989.tb07289.x.
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Osowicka-Kondratowicz, Magdalena, Joanna Białkowska, and Paweł Białkowski. "Specyfika pracy oraz rola logopedy w interdyscyplinarnym modelu opieki nad chorym po udarze mózgu." Prace Językoznawcze 20, no. 4 (September 16, 2019): 181–96. http://dx.doi.org/10.31648/pj.4491.
Abstract:
The interdisciplinary team involved in the rehabilitation process of the post-CVA patient requires close co-operation among all involved health care professionals in order to ensure a continuous exchange of information and to relate the same information to the patient. The lack of awareness of each team member’s work-related tasks could jeopardize the effectiveness of the rehabilitation process instead of enhancing it. Therapeutic goals cannot be achieved during the rehabilitation process if there is inadequate team cooperation when treating a patient. For example, unfamiliarity with the treatment approach that is utilized by the speech therapist may cause developing pathological movement patterns in CVA patients. Interdisciplinary teamwork is a complex process which needs to be based on exchanging knowledge and skills to impact patient care. The purpose of this article is to describe the speech therapy approach to the rehabilitation of a post CVA patient. This type of approach needs to be included in the planning of a complex care for a population of patients with neurological disorders, especially for those suffering from CVA. These patients comprise the majority of neurological disorders.
5
Linsenmeyer, Todd A. "Post-CVA voiding dysfunctions: Clinical insights and literature review." NeuroRehabilitation 30, no. 1 (February 15, 2012): 1–7. http://dx.doi.org/10.3233/nre-2012-0721.
6
Eberly, V. J., C. J. Newsam, S. J. Mulroy, W. B. Weiss, J. K. Gronley, and J. Perry. "CLINICAL INDICATIONS FOR AFO PRESCRIPTION IN INDIVIDUALS POST CVA." Journal of Neurologic Physical Therapy 28, no. 4 (December 2004): 186. http://dx.doi.org/10.1097/01253086-200412000-00055.
7
Bhatti, Sameera Ayub, Ayesha Butt, and Afifa Khanam. "The Effects of Dictionary Vocabulary Learning Versus Contextual Vocabulary Acquisition on the Vocabulary Development of Pakistani EFL Learners." Global Regional Review IV, no. IV (December 31, 2019): 140–48. http://dx.doi.org/10.31703/grr.2019(iv-iv).16.
Abstract:
The vocabulary of a language refers to the range of words used in it. A number of strategies are used in EFL classrooms to teach vocabulary, where the most common are Dictionary Vocabulary Learning (DVL) and Contextual Vocabulary Acquisition (CVA) The present study investigates the difference between the vocabulary development of EFL learners undergone the mentioned strategies. The study is experimental and the population is the BS students of Punjab (Pakistan). The sample was forty EFL students, divided as group 1 and group 2, where group 1 was taught by using DVL while group 2 was taught by CVA. Pre and Post tests were used to see the effects of DVL on group 1 and of CVA on group 2. Results indicated that the vocabulary development of the students taught by using CVA was higher than the students taught by DVL.
8
Baran, Jane A., Richard W. Bothfeld, and Frank E. Musiek. "Central Auditory Deficits Associated with Compromise of the Primary Auditory Cortex." Journal of the American Academy of Audiology 15, no. 02 (February 2004): 106–16. http://dx.doi.org/10.3766/jaaa.15.2.2.
Abstract:
The subject of this study was a 46-year-old female who had suffered a cerebrovascular accident (CVA). Magnetic resonance imaging revealed damage in the area of the distribution of the middle cerebral artery involving most, if not all, of the primary auditory area of the left hemisphere. No auditory problems were noted prior to the CVA; however, following the CVA, the subject reported a number of auditory difficulties. Pure-tone thresholds were normal post-CVA, and performance on speech recognition testing was good in both ears if ample time was provided between a response and the presentation of the next test item. Duration pattern, intensity discrimination, and middle latency response test results were abnormal for both ears, and right ear deficits were evident on an auditory fusion test and two dichotic speech tests (digits and rhymes). This case is significant in that it demonstrates a good correlation between damage to known key auditory regions and central auditory test results.
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Benedetto, Umberto, Mario F. Gaudino, Arnaldo Dimagli, Stephen Gerry, Alastair Gray, Belinda Lees, Marcus Flather, et al. "Postoperative Atrial Fibrillation and Long-Term Risk of Stroke After Isolated Coronary Artery Bypass Graft Surgery." Circulation 142, no. 14 (October 6, 2020): 1320–29. http://dx.doi.org/10.1161/circulationaha.120.046940.
Abstract:
Background: Postoperative atrial fibrillation (pAF) after coronary artery bypass grafting is a common complication. Whether pAF is associated with an increased risk of cerebrovascular accident (CVA) remains uncertain. We investigated the association between pAF and long-term risk of CVA by performing a post hoc analysis of 10-year outcomes of the ART (Arterial Revascularization Trial). Methods: For the present analysis, among patients enrolled in the ART (n=3102), we excluded those who did not undergo surgery (n=25), had a history of atrial fibrillation (n=45), or had no information on the incidence of pAF (n=9). The final population consisted of 3023 patients, of whom 734 (24.3%) developed pAF with the remaining 2289 maintaining sinus rhythm. Competing risk and Cox regression analyses were used to investigate the association between pAF and the risk of CVA. Results: At 10 years, the cumulative incidence of CVA was 6.3% (4.6%–8.1%) versus 3.7% (2.9%–4.5%) in patients with pAF and sinus rhythm, respectively. pAF was an independent predictor of CVA at 10 years (hazard ratio, 1.53 [95% CI, 1.06–2.23]; P =0.025) even when CVAs that occurred during the index admission were excluded from the analysis (hazard ratio, 1.47 [95% 1.02–2.11]; P =0.04). Conclusions: Patients with pAF after coronary artery bypass grafting are at higher risk of CVA. These findings challenge the notion that pAF is a benign complication.
10
Saha, Somnath, Anton Dev X, and Prithvi Das. "Evaluation of Language in Post-CVA Patients: A Clinicophonological Study." International Journal of Phonosurgery & Laryngology 11, no. 2 (February 28, 2021): 54–60. http://dx.doi.org/10.5005/jp-journals-10023-1229.
Dissertations / Theses on the topic "Post CVA":
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Read, Jennifer Louise. "Recovery of language and reading in post-CVA aphasia : A longitudinal study." Thesis, University of Manchester, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.508550.
2
Van, Dokkum Elisabeth Henriëtte. "Unfolding movement in time and space : defining upper-limb recovery post-stroke." Thesis, Montpellier 1, 2013. http://www.theses.fr/2013MON14004/document.
Abstract:
Plusieurs champs de recherche ont été combinés - mettant en évidence l'utilité de l'analyse cinématique, non seulement afin d'évaluer le comportement moteur, mais aussi afin de contribuer à la compréhension de la récupération motrice post-AVC. Au travers d'analyses cinématiques, les mouvements du membre supérieur hémiplégique ont été décomposés dans le temps et l'espace, afin d'en extraire l'échelle et les composantes structurelles. Cette décomposition systématique, d'abord connue pour son bien-fondé clinique, nous a permis d'identifier les marqueurs les plus pertinents du contrôle du membre supérieur parétique : i.e., la fluidité, la rectitude et la vitesse. Subséquemment, il a été démontré que i) les changements cinématiques se stabilisent au cours de la phase de rééducation, indiquant potentiellement la nécessité de modifier la stratégie thérapeutique; ii) les patient post-AVC sont capables de percevoir la fluidité du mouvement en réalité virtuelle, cette perception étant meilleure lorsque le feedback visuel ne concerne que le point du travail du membre; iii) l'espace de travail post-AVC n'est pas isotrope pour un patient hémiplégique; iv) chez les patients post-AVC, le niveau de ‘bruit neuromoteur' est augmenté; et v) la cinématique reflète la conséquence des stratégies d'adaptation à l'augmentation du bruit, ces stratégies étant basées sur un compromis entre des modes de contrôle d'erreur en feedforward et en feedback des actions motrices. Ainsi, il peut être conclut que la décomposition du mouvement dans le temps et l'espace est un moyen simple et efficace d'appréhender contrôle moteur chez l'Homme en situation normale et âpres AVC. L'enjeu est maintenant d'implémenter ces méthodes d'analyse cinématique dans les protocoles de rééducation post-AVC quotidienne afin de développer de larges bases de données permettant, à l'aide de méthodes de modélisation, de définir des profils de récupération et ainsi personnaliser de façon optimale la rééducation à chaque patient particulierMultiple research fields were combined – highlighting the value of kinematic analysis, not only to evaluate motor behaviour, but also to contribute to the understanding of motor recovery post-stroke. By means of kinematics, hemiplegic upper-limb movements were unfolded in time and space, to extract the scaling and structural components of the movement. This systematic decomposition, first proven to have clinical relevance, allowed us to identify the most pertinent markers of paretic upper-limb control: i.e. smoothness, directness and velocity. Subsequently it was shown that i) change in kinematics levels off over rehabilitation, possibly indicating that treatment may profit from change; ii) people post-stroke are able to perceive movement fluency in virtual realities, whereby simple end-point displays facilitate perception; iii) the workspace post-stroke is heterogeneous; iv) stroke patients have increased levels of neuromotor noise; and v) kinematics reflect the outcome of adaptation strategies to the increased noise in relation to the automaticity of error-corrections on the trade-off between feedforward and feedback based motor control. It may thus be concluded that unfolding the movement in space and time, is a simple and powerful way to define human motor control. The challenge is to implement kinematic analysis in daily post-stroke practice to develop a large database enabling the definition of recovery profiles contributing to provide each individual patient with the right therapy at the right time
3
Meziani, Yeser. "A Kinematic Framework for Upper Extremity Rehabilitation Assessment : Expectation- Maximization as a Motor Learning Model." Electronic Thesis or Diss., Université de Lorraine, 2022. http://www.theses.fr/2022LORR0096.
Abstract:
L'apprentissage moteur en tant que mécanisme de récupération est supposé être un cadre qui a guidé les principes de la thérapie physique et qui, depuis l'avènement de la robotique, fait de même pour les dispositifs de réadaptation. Le processus de réadaptation représente l'intersection de nombreuses facettes interconnectées qui co-interagissent pour produire des mouvements récupérés. L'utilisation de la technologie présente de nombreux avantages tout en contribuant à la complexité du phénomène en question. Nous intéressons notre recherche à l'entraînement passif par exosquelette du membre supérieur. Nous proposons une échelle d'évaluation adaptative intra-patient qui est capable de détecter les changements de performance intra-patient pendant l'entraînement robotique. L'apprentissage moteur, le processus par lequel notre cerveau acquiert de nouvelles capacités motrices ou réapprend celles qu'il a perdues suite à un incident neurologique ou traumatique, est notre entrée pour étudier ce phénomène. L'interaction du système composé de l'appareil, de l'incitation sous forme de jeux sérieux et des patients avec tous leurs niveaux d'existence, physiologiques, psychologiques et cognitifs est le système d'étude. Les composants présentent des qualités hétérogènes et des changements dynamiques. La sortie du système sous la forme de trajectoires exécutées est notre instrument de mesure pour étudier les interactions au sein du système. Nous formulons le modèle de trajectoire comme une chaîne de Markov et utilisons le filtre de Kalman pour estimer les états lissés. Alors que la dynamique varie dans le temps, nous modélisons les hypothèses sur le mouvement dans une formulation dynamique et estimons ses paramètres à partir des données. Pour tenir compte de la variabilité temporelle,nous introduisons une source de bruit parallèle à la dynamique et l'estimons à l'aide d'un algorithme d'espérance-maximisation. La nature temporelle n'étant qu'une seule facette du phénomène cinématique, nous supposons un alignement temporel variable et l'estimons en utilisant l'itération d'espérence-maximisation pour augmenter la vraisemblance du modèle estimé par rapport aux trajectoires observées. Une fois appris, les paramètres dépendants du modèle et extraits sont utilisés pour comparer les différences de performance. Les propriétés des outils d'évaluation clinique sont étudiées et les résultats sont formulés pour répondre aux besoins communément signalés. En partant des mêmes principes fondamentaux de l'apprentissage moteur, nous avons cherché à définir un nouvel instrument d'évaluation visuelle destiné à répondre au besoin d'un formulaire de retour d'information facile à communiquer pour le patient. Nous présentons et évaluons les propriétés cliniques de l'outil tout en fournissant des résultats de validation sur des données cliniques attestant de la sensibilité longitudinale de l'outil. L'hypothèse sous-jacente de la visualisation a ensuite été évaluée à l'aide d'une mesure objective de la valeur de probabilité maximale dérivée d'un modèle probabiliste des trajectoires et appliquée sur un modèle de trajectoire hautement probable appris à l'aide d'un régresseur Kernel K-Nearest Neighbors (KNN)Motor learning as a recovery mechanism is assumed to be a framework that drived and guided physical therapy and now since the advent of robotics doing the same to the rehabilitation devices. The rehabilitation process presents the intersection of many different interconnected facets that co-interact to produce recovered movements. The use of the technology introduces many benefits while contributing to the complexity of the phenomena at hand. We interest our research to the passive exosquelette training of the upper limb. We propose an adaptive intra patient assessment scale that is capable of detecting intra-patient performance changes during robotic training. Motor learning, the process of our brain's acquiring newer motor skills or relearning those he lost due to neurological or traumatic incident is our portal to investigating this phenomenon. The interaction of the system that is composed of the device, the incentive in form of exercise games and the patients with all its level of existence, physiological, psycho-logical, and cognitive is the system of study. The components present heterogeneous qualities and dynamically driven changes. The system output in the form of the trajectories executed is our gauging instrument to investigate the interactions within the system. We formulate the trajectory model as a Markov Chain and use the Kalman Filter to estimate the smoothed states. While dynamics are variant in time we model the assumptions about the movement into a dynamical formulation and estimate its parameters from data. To account for the time variability we introduce parallel noise source to the dynamics and estimate it using an Expectation-Maximization algorithm. The temporal nature being only a single facet of the kinematic phenomena, we assume a variable temporal alignment and estimate it using Expectation-Maximization iteration to increase the likelyhood of the estimated model compared to the observed trajectories. Once learned the model dependent and extracted parameters are used to compare between differences in performance. The properties of the clinical assessment tools are investigated and results are formulated to answer the commonly reported needs. Stemming from the same fundamentals of motor learning, we aimed to define a new visual assessment instrument that is intended to fulfill the need of patient-first easily communicated feedback form. We present and assess clinical properties of the tools while providing validating results on clinical data attesting the longitudinal sensitivity of the tool. The underlying assumption of the visualization was then assessed using an objective measure of maximum probability value derived using a probabilistic model of the trajectories and expected on a highly likely trajectory model learned using a Kernel-Near-Neighbors Regressor
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Pina, Josefina da Costa. "A pessoa com depressão pós Acidente Vascular Cerebral." Master's thesis, Instituto politécnico de Setúbal. Escola Superior de Saúde, 2013. http://hdl.handle.net/10400.26/6157.
Abstract:
Relatório do Trabalho de Projeto realizado no âmbito do I Curso de Mestrado em Enfermagem de Saúde Mental e Psiquiatria.Depressão Pós Acidente Vascular Cerebral (DPAVC) é a complicação mais frequente no Acidente Vascular Cerebral (AVC), com uma taxa de prevalência estimada em 60% (Sequeira et al 2006). As repercussões da doença são significativas pelo grau de limitação funcional que provocam (Terroni et al, 2008). De acordo com Ginkel et al (2010), é realçada a importância e o papel do enfermeiro na reabilitação física da pessoa com AVC, comparativamente à reabilitação mental, sendo pouco conhecidas as intervenções terapêuticas que podem ser realizadas nesta área. Consciencializados para a problemática existente e com intenção de intervir visando a promoção da Saúde Mental, abordamos neste documento a necessidade da continuidade de cuidados especializados em enfermagem de Saúde Mental, à pessoa com DPAVC. Para salientar o trabalho desenvolvido e as atividades realizadas de acordo com a intervenção pretendida, elaboramos um Projeto de Intervenção em Serviço (PIS). O PIS assenta na prática baseada na evidência em contexto da prática clínica e baseou-se na Metodologia de Projeto, com as etapas a ele inerentes. A etapa diagnóstica que serviu de base para este documento, relacionou-se com a identificação das necessidades no domínio dos cuidados especializados em enfermagem de Saúde Mental, em pessoas com DPAVC. A problemática da situação centrou-se na pessoa com depressão pós AVC, sem acompanhamento em Saúde Mental após alta do hospital. Com base na metodologia de projeto procedemos à deteção de alterações emocionais em pessoas internadas numa Unidade de Acidente Vascular Cerebral (UAVC), de um hospital numa região no sul do país. Para tal, foi aplicada a Escala Hospitalar de Ansiedade e Depressão – HADS (Hospital Anxiety Depression Scale). As intervenções de enfermagem planeadas apoiaram-se nas relações interpessoais e visaram a continuidade dos cuidados de enfermagem em Saúde Mental na comunidade, assentes numa parceria com os Cuidados de Saúde Primários (CSP), através da Unidade de Cuidados na Comunidade (UCC), na referida localização. Este Trabalho de Projeto permitiu a aquisição e o desenvolvimento de competências ao nível da intervenção especializada, contribuindo para a qualidade dos cuidados. Para a sua concretização foi realizada uma revisão bibliográfica de vários autores e de artigos de investigação localizados e reunidos nas bases de dados Medline, Cinahl e Cochrane.
Abstract: The Post Stroke Depression (PSD) is the most frequent complication in stroke (CVA) with a prevalence rate estimated at 60 % (Sequeira et al 2006). The repercussions of the disease are significant degree of functional limitation that cause (Terroni et al, 2008). According Ginkel et al (2010), is highlighted the importance and role of the nurse in the physical rehabilitation of people with stroke , compared to mental rehabilitation, being little known therapeutic interventions that can be performed in this area. Made aware to the problems existing with intent to intervene for the promotion of mental health, in this paper we address the need for continuity of care in skilled nursing Mental Health, the person with PSD. To highlight the work and activities undertaken in accordance with the intended intervention, we prepared a Draft Intervention Service (PIS). The PIS is based on evidence-based practice in the context of clinical practice and based on the Project Methodology, with steps attached thereto. The diagnostic phase which formed the basis for this document was related to the identification of needs in the area of specialized nursing care of Mental Health, people with PSD. The problematic situation focused on the person with depression after stroke, unaccompanied Mental Health after discharge from hospital. Based on the design methodology proceeded to the detection of emotional changes in people hospitalized in Unidade de Acidente Vascular Cerebral (UAVC), a hospital in the south region of the country. To this end, we applied the Hospital Anxiety and Depression – HADS (Hospital Anxiety Depression Scale). Nursing interventions planned relied on interpersonal relations and aimed continuity of care in mental health nursing in the community, based on a partnership with the Primary Health Care, through the Community Care Unit at said location. This Project work allowed the acquisition and development of skills in the specialized intervention, contributing to the quality of care. For its realization was a literature review of several authors and research articles located and gathered in the databases Medline, CINAHL and Cochrane.
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Nilsson, Tina. "EX POST COST-BENEFIT ANALYS : En studie om metodik för att utföra efterkalkyler utifrån exempel från Trafikverket." Thesis, Luleå tekniska universitet, Institutionen för ekonomi, teknik och samhälle, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-69702.
Abstract:
Syftet är att analysera ex post CBA utifrån exempel från Trafikverket. Metoden är att utgå från ekonomisk teori och identifiera relevanta steg för att upprätta ex ante och ex post CBA. Utifrån de steg som anses vara relevanta vid upprättande av ex post jämför studien för- och efterkalkyler för två åtgärder inom transportinfrastrukturen. Studien har avgränsats till att jämföra ex ante och ex post för en järnvägsåtgärd och en vägåtgärd. Resultatet visar att Trafikverkets metodik för att upprätta ex post fem år efter att en vägåtgärd är färdigbyggd lider av ett principiellt problem med avseende på tidsperioden, som orsakar systematiska skillnader mellan ex ante och ex post i beräknad samhällsekonomisk lönsamhet, vilket är missvisande när det används som jämförbart. Ingen meningsfull jämförelse utförs ex post fem år efter att en järnvägsåtgärd är slutförd, och den verbala beskrivningen av den förändrade samhällsekonomiska lönsamheten är missvisande utifrån att det är en ögonblicksbild, jämfört med ex ante som baseras på en längre period.The aim of this study is to analyze ex post CBA based on examples from the Swedish Transport Administration. The method is to use economic theory and identify relevant steps for establishing CBA ex ante and ex post. The study is delimited to compare ex ante and ex post for one railway- and road project. The results show that the Swedish Transport Administration methodology ex post for road projects five years after completion suffers from a fundamental problem regarding the period of time, which causes systematic differences between ex ante and ex post in calculated socio-economic profitability, which is misleading when used as comparable. No meaningful comparison is made ex post for rail projects five years after completion. Only a verbal description of the socio-economic profitability is done which is misleading as it is a snapshot, compared to ex ante that is based on an extended period of time.
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Pathirana, Dilan. "Numerical Modelling of Blood Flow for Coarctation of the Aorta: Pre- and Post-treatment Simulations." Thesis, Griffith University, 2019. http://hdl.handle.net/10072/387287.
Abstract:
Coarctation of the Aorta (CoA) is a disease that is present in newborns and is
commonly described as a short section of narrowing in the aorta. This thesis uses
mathematical and numerical modelling to investigate both pre- and post-treatment
issues experienced by CoA patients, by examining the effect of the coarctation, some
associated cardiovascular abnormalities, as well as treatments for CoA, on blood flow
properties.
CoA is a serious congenital heart disease, and the mean age of mortality has
been estimated to be 34 years. Treatments generally focus on resolving the physical
restriction in the aorta, which is the coarctation, although CoA is associated with
many cardiovascular abnormalities. Despite the availability of several treatments,
treated CoA patients experience late hypertension and have a decreased life expectancy
compared to normal people. Two examples of treatments are resection
and end-to-end anastomosis (REA) and stents. REA is a surgical treatment that
involves excising the coarctation and suturing the remaining aorta together. Stents
are a catheter-based intervention where a catheter is inserted into the artery and
used to expand a metal stent into the coarctation. It is unclear whether a particular
treatment is superior, as there is insufficient long-term data for some treatments.
Several reviews of treatments for CoA have concluded that additional data are
required to understand whether these recently utilised treatments result in superior
long-term outcomes.
Numerical simulation of mathematical models of blood flow in arteries can be used
to investigate and compare treatments where clinical data are lacking, and difficult or
expensive to obtain. This thesis uses existing one-dimensional mathematical models
of blood flow in arteries, which have been shown to reproduce the main features of
hemodynamics. Equations are developed to implement altered arterial properties,
such as artery wall stiffness and cross-sectional luminal area, in the models. These are
used in simulations to investigate the effect of various conditions that are observed
in CoA patients, pre- and post-treatment, on blood flow properties that are related
to negative outcomes.
Treatments for coarctation necessarily affect the compliance and wall properties
of the aorta, in the region where they are implemented. REA involves excising the
coarctation and suturing the remaining aorta together, and is studied as a short
section of increased stiffness in the aorta wall in this thesis. Stents are studied as a
longer region of increased stiffness.
First a single tube model of the aorta is used to investigate the local effects
of the REA and stent treatments. It is found that the increased stiffness in the
aorta wall from REA and stent treatments, compared to normal people, results in
increased blood pressure and increased radial expansion of the artery walls, which may
contribute to the incidence of hypertension and aneurysms in treated CoA patients.
This increased blood pressure and radial expansion is found in both untapered and
tapered aortas. Flow in a tapered stent, which narrows with the aorta in a tapered
aorta model, is also simulated and compared to flow in a straight stent in a tapered
aorta. Unexpectedly, the straight stent produces some superior (closer to normal)
blood flow properties, compared to the tapered stent.
To identify possible causes of isolated systolic hypertension, which is common in
CoA patients, parameters in the model are modified and simulations are performed
to identify the effect of altered parameters on blood flow properties. Of the parameters
tested, artery wall stiffness is identified as a suitable parameter for further
investigation, based on the results of this thesis, as well as other studies that have
shown increased stiffness in the upper body arteries of CoA patients.
Next a network model of the major arteries is adapted to incorporate a range of
coarctation severities, various increases to the stiffness in the arteries in the upper
body, the REA and stent treatments used in the previous aorta model, and eccentric
left ventricular hypertrophy, which are all present in some CoA patients pre- or
post-treatment. CoA is known to be difficult to diagnose and is underdiagnosed
in early life, and simulation results suggest CoA with mild or moderate severity
coarctations may not produce the symptoms that are typically associated with CoA.
The artery stiffness associated with CoA is known to increase with age in untreated
patients, and simulations show that increased stiffness may increase the severity
of CoA symptoms, which may explain why some CoA patients are not diagnosed
until later in life. This increased stiffness is known to persist post-treatment, and it
results in increased systolic blood pressure when simulated, which may explain why
hypertension persists in treated patients.
Two blood velocity indices, Gosling’s pulsatility index and Pourcelot’s resistivity
index, are calculated from results in the models, in an attempt to find measurements
that could be tested in patients to aid in diagnosis. Gosling’s pulsatility index, which
is a calculation involving systolic, diastolic and average blood velocity, is found to
differentiate between mild, moderate and severe coarctations, which may improve
diagnosis rates in infants.
The stent and REA treatments are also compared in the network artery model.
REA is found to produce the most normal blood flow properties, which suggests that
the REA treatment is likely to produce better long-term outcomes for patients than
the stent treatment.
Eccentric left ventricular hypertrophy is an increase in the mass of the left
ventricle of the heart, without a relative increase in wall thickness, and is detected
in a significant number of CoA patients, including post-treatment. In all presented
simulations, the inflow from the heart into the aorta is specified as a flow waveform,
and eccentric left ventricular hypertrophy is modelled as a scaling of the waveform.
The results in this thesis suggest that this type of hypertrophy could be associated
with the hypertension and aneurysms observed in CoA patients. Other results that
are found suggest that the diagnosis and treatment of CoA patients may be affected
by eccentric left ventricular hypertrophy.
Although CoA increasingly appears to have life-long negative outcomes despite
treatment, it is hoped that the findings in this thesis may help to explain and improve
these outcomes for patients.Thesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Environment and Sc
Science, Environment, Engineering and Technology
Full Text
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Azad, Arsalan Afzal. "Characterising a role for acetyl-coenzyme A synthetase 2 in the regulation of autophagy." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/277748.
Abstract:
The important role of the central intermediary metabolite acetyl-coenzyme A (AcCoA)for several anabolic and catabolic pathways is well characterised. However, the role of AcCoA as the only known donor of acetyl groups for protein acetylation in regulation of enzyme activities, protein complex stability as well as epigenetic status off chromatin, is only recently emerging. Among multiple other pathways, the autophagy pathway has now been shown to be directly regulated by protein acetylation and deacetylation. Therefore, it was reasoned that the availability of AcCoA, via the modulation of AcCoA generating enzymes, may regulate autophagy. This study has focussed on the role of the acetate-mediated route to nuclear-cytosolic AcCoA synthesis, catalysed by AcCoA synthetase 2 (ACSS2), in the regulation of autophagy.
8
Santandrea, Sara. "Valutazione delle performance sismiche di pareti in c.a. a cavi post-tesi mediante confronto con pareti tradizionali incastrate alla base." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019.
Abstract:
Con il presente elaborato ci si pone l’obbiettivo di determinare le performance delle pareti prefabbricate in c.a. a cavi post-tesi. Questi sistemi nascono con lo scopo di ottenere un sistema sismo resistente che sia in grado di far fronte alla sollecitazione di progetto con limitati danneggiamenti e spostamenti residui. Questi obbiettivi vengono raggiunti inserendo nella parete dei cavi post-tesi; essi collegano la parete alla fondazione e ne consentono il meccanismo di “rocking”, ovvero l’oscillazione che prevede l’apertura e chiusura del giunto di base. In questo modo a danneggiarsi, in minima parte, sono solo gli spigoli di base sui quali la parete fa perno nell’oscillazione. Inoltre la presenza dei cavi, progettati per rimanere in campo elastico per la sollecitazione sismica di progetto, ricentra il sistema in seguito all’evento sismico minimizzando gli spostamenti residui. Questi sistemi però sono in grado di dissipare solo una piccola quantità di energia sismica e di conseguenza possono sperimentare elevati spostamenti. Per ovviare a questo problema si possono utilizzare dissipatori, ovvero dispositivi facilmente sostituibili che, aumentando l’energia dissipata, migliorano le performance del sistema. Basandosi sulle campagne di sperimentazione finora svolte sulle pareti a cavi post-tesi è stato possibile dimensionare uno di questi sistemi, modellarlo in un software agli elementi finiti e sottoporlo ad analisi dinamiche non lineari. La stessa cosa è stata fatta per una parete in c.a. tradizionale incastrata alla base, che è stata dimensionata seguendo le indicazioni della normativa vigente e sottoposta alle stesse analisi. È stato quindi possibile confrontare le pareti sulla base di parametri ingegneristici e in relazione ai diversi stati limite che caratterizzano la progettazione sismica.
9
Alia, Claudia. "Studying and modulating post-stroke neuroplasticity to improve motor recovery." Doctoral thesis, Scuola Normale Superiore, 2016. http://hdl.handle.net/11384/86002.
Abstract:
Limited restoration of motor function occurs spontaneously during a plastic time window after stroke. A deeper understanding of post-stroke plasticity is critical to devise more effective pharmacological and rehabilitative treatments.
Here, I have characterized the spontaneous evolution after a photothrombotic lesion in mice, both in terms of motor deficit and plasticity in the perilesional cortex. In generalized motor tasks such as the Gridwalk and Schallert Cylinder test, motor deficits were stable for at least 30 days after photothrombotic stroke in the Caudal Forelimb Area (CFA). The skilled reaching test, performed once a week, showed a trend for spontaneous improvement over time in the number of correct graspings. However, kinematic analysis, evaluated by means of an innovative semi-automated tool, revealed a persistent alterations in grasping movements, pointing to the development of compensatory strategies.
The perilesional cortex has been proposed as the area mediating functional recovery. I found a reorganization of the motor maps in sensorimotor cortex around to the lesion. Particularly, I observed a significant shrinkage of the forelimb area, in favour of hindlimb representation using Intracortical Microstimulation (ICMS). Moreover, neuroanatomical markers, previously characterized in the literature as “neuroplasticity brakes” (i.e. Perineuronal nets, Parvalbumin- and Somatostatin-positive cells) spontaneously decrease after stroke, suggesting an enhancement of the potential for plastic rearrangements. Altogether these results, suggest a spontaneous attempt to reopen a critical period characterized by sprouting and plasticity phenomena, that needs to be amplified and properly guided for maximizing recovery.
The GABAergic system is one of the key modulators of plasticity in the brain, and its role has been amply studied in relation to opening and closure of the “critical period” in sensory cortices during development. To test whether reductions in GABAergic signalling were causally involved in motor improvements, we treated animals during an early post-stroke period with a benzodiazepine inverse agonist, which impairs GABAA receptor function. We found that hampering GABAA signalling led to significant restoration of function in general motor tests such as the gridwalk and the pellet reaching tasks, with no significant impact on the kinematics of reaching movements. Improvements were persistent as they remained detectable about three weeks after treatment.
Using electrophysiological recordings I found an electrical imbalance between the two hemispheres. In particular, contralesional motor cortex was found to exert an enhanced transcallosal inhibition over the spared, perilesional tissue. Silencing the healthy hemisphere using cortical infusion of Botulinum Neurotoxin E, partially improved motor recovery in the gridwalk test.
We then established a rehabilitation protocol that combined intensive and highly repeatable exercise of the mouse forelimb with a robotic platform with reversible inactivation of the healthy, contralesional motor cortex. We found that such treatment promoted recovery in both Gridwalk and Schallert Cylinder tests and in end point measures during Skilled reaching test. Remarkably, the combined therapy also restores pre-lesion movement patterns during reaching movement, as evaluated by kinematic analysis. Furthermore, such rehabilitated animals showed a more plastic perilesional cortex, with an additional significant decrease in plasticity brakes.
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Törö, Tuukka. "Cooperation or Aid? A Corpus-Assisted Critical Discourse Analysis of Finland’s Development Policy." Thesis, Malmö universitet, Fakulteten för kultur och samhälle (KS), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-22715.
Abstract:
The current Finnish development policy, published in 2016, follows the United Nations 2030 Agenda for Sustainable Development and its 17 sustainable development goals. With the help of a few tools from corpus linguistics, this study conducts a critical discourse analysis of the policy, using Norman Fairclough’s three-dimensional method for CDA as its methodologicalframework and post-development theory as its main theoretical background. The study focuses on the definitions of development and its implementation as put forward by the policy, and how the policy text relates to its production and consumption as well as to the social and political context in which it is situated. Rather than working toward cooperation and participation which it promises, the policy reinforces the image of top-down aid dictated by institutions of the global North. It juxtaposes Finland as a giver and saviour with countries in the global South as vulnerable receivers of aid, granting little agency for the institutions,let alone the people of its development partners.
Books on the topic "Post CVA":
1
Chŏn, Chun-yŏng. Sara namŭn cha ŭi nunmul. 8th ed. Taejŏn Kwangyŏksi: Orum Edition, 2020.
2
Mariotti, Marcella, Maria Roberta Novielli, Bonaventura Ruperti, and Silvia Vesco. Rethinking Nature in Post-Fukushima Japan. Venice: Edizioni Ca' Foscari, 2018. http://dx.doi.org/10.30687/978-88-6969-264-2.
Abstract:
This volume brings together the papers presented at the international symposium Rethinking Nature in Contemporary Japan: Facing the Crisis held at Ca’ Foscari University of Venice in March 2015, as the last of a three-years research project on post-Fukushima Japan funded by the Japan Foundation. The book focuses on Religion and Thought, Fine Arts, Music, Cinema, Animation and Performing Arts (Theatre and Dance), from a multidisciplinary perspective.
3
Flagstaff House Museum of Tea Ware (Hong Kong), ed. Zhongguo tao ci cha ju: Cha ju wen wu guan Luo Guixiang zhen cang. Xianggang: Shi zheng ju, 1991.
4
Olmsted, Kathryn S. Challenging the secret government: The post-Watergate investigations of the CIA and FBI. Chapel Hill: University of North Carolina Press, 1996.
5
Kamiya, Niji. Cha nora pose: Tamunhwa ihae rŭl wihan Han-Il ch'ukche. 8th ed. Kyŏnggi-do Kunp'o-si: T'ohyang, 2008.
6
Bernstein, Carl. Zong tong de ren ma: 2 ming ji zhe, 700 tian zhui zong, shui men an diao cha bao dao jing dian yuan zhu. 8th ed. Taibei Shi: Mai tian chu ban, 2016.
7
Honorato, Cezar Teixeira. O polvo e o porto: A Cia. Docas de Santos, 1888-1914. São Paulo: Editora Hucitec, 1996.
8
Zheng, Shiyuan. Zhongguo gang kou fei lü, tou zi he cha yi hua gui zhi yan jiu. 8th ed. Shanghai Shi: Shanghai jiao tong da xue chu ban she, 2011.
9
Scott-Smith, Giles. The politics of apolitical culture: The Congress for Cultural Freedom, the CIA and post-war American hegemony. London: Routledge, 2002.
10
Shanxi Sheng kao gu yan jiu yuan. Cong Chang'an dao Lasa: 2014 Tang Fan gu dao kao cha ji hang = Between Chang'an and Lhasa : notes of 2014 expedition about ancient roads between Tang dynasty and Bod regime. 8th ed. Shanghai: Shanghai gu ji chu ban she, 2017.
Book chapters on the topic "Post CVA":
1
Visser, Harry John. "Case #18: Tendon Lengthening Management of Rigid Equinoadductovarus Foot Deformity Post CVA." In Challenges in Foot and Ankle Reconstructive Surgery, 123–28. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-07893-4_18.
2
Etemad, Elizabeth. "Man with Downhill Post-CVA Course Complicated by Loss of Wife’s Support Due to Her Own Illness." In Integrated Care for Complex Patients, 105–9. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-61214-0_14.
3
Wanjiru, Stanley Mwangi. "(In)dependence Cha Cha Cha! Post-Colonialism, Situated." In Black Iconography and Colonial (re)production at the ICC, 20–50. London: Routledge, 2022. http://dx.doi.org/10.4324/9781003304173-2.
4
von Maurich, Ingo, Lukas Heberle, and Tim Güneysu. "IND-CCA Secure Hybrid Encryption from QC-MDPC Niederreiter." In Post-Quantum Cryptography, 1–17. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-29360-8_1.
5
Boyen, Xavier, and Qinyi Li. "Direct CCA-Secure KEM and Deterministic PKE from Plain LWE." In Post-Quantum Cryptography, 116–30. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-25510-7_7.
6
Zafar, Ali. "An Alternative: Flexible Exchange Rates and Post-Pandemic Recovery." In The CFA Franc Zone, 151–55. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-71006-4_25.
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Zafar, Ali. "Ten-Step Exchange Rate Reform for a Post-Pandemic World." In The CFA Franc Zone, 201–12. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-71006-4_34.
8
Nguyen, Viet Thanh, and Chi Zhang. "Assessment of the Influence of TH Port’s Breakwater on the Hydrodynamic Regime in Cua Lo and Cua Hoi Estuaries, Nghe an Province, Vietnam." In Lecture Notes in Civil Engineering, 46–56. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-1260-3_5.
Abstract:
AbstractTH Port is in offshore of Cua Lo estuary, Nghe An Province, Vietnam. In master plan from 2021 to 2030 and vision to 2050 years, an offshore breakwater will be built to protect the harbour basin of the port. This paper will be investigated the influence of the offshore breakwater on the hydrodynamics changes by a couple numerical model. The results indicated that the hydrodynamic regime control by the presence of offshore breakwater in monsoon and storm conditions and the offshore breakwater plays an important role in protection of TH port in NE monsoon and storm waves conditions and the presence of breakwater induced circulations in front of two estuaries and the mid area of Cua Lo beach.
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Stokowska, Anna, and Marcela Pekna. "Complement C3a: Shaping the Plasticity of the Post-stroke Brain." In Cellular and Molecular Approaches to Regeneration and Repair, 521–41. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-66679-2_26.
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Hoffmann, Clément, Benoît Libert, Charles Momin, Thomas Peters, and François-Xavier Standaert. "POLKA: Towards Leakage-Resistant Post-quantum CCA-Secure Public Key Encryption." In Lecture Notes in Computer Science, 114–44. Cham: Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-31368-4_5.
Conference papers on the topic "Post CVA":
1
EMILIA, OPRISAN, and CHIRIAC ILONA. "Using Video Games for Kinect System in Post-CVA Recovery." In Psychology and the realities of the contemporary world. Romanian Society of Experimental Applied Psychology, 2016. http://dx.doi.org/10.15303/rjeap.2016.si1.a49.
2
Berson, Arganthae¨l, Gae¨lle Poignand, Philippe Blanc-Benon, and Genevie`ve Comte-Bellot. "A New Procedure to Capture Temperature Fluctuations Using Cold Wires: Application to Thermoacoustic Systems." In ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting collocated with 8th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2010. http://dx.doi.org/10.1115/fedsm-icnmm2010-30788.
Abstract:
The improvement of the thermal coupling between the stack of a thermoacoustic refrigerator and the heat exchangers is necessary to achieve high-efficiency and stable operation. Heat transport by the thermoacoustic effect depends on both the velocity and temperature fields. Inside the stack, it can be described by the linear theory of thermoacoustics. However, departures from linear behaviours are expected near the edges of the stack and in the heat-exchangers due to the generation of vorticity and temperature harmonics. The present work focuses on the experimental characterization of temperature harmonics near the edges of a thermoacoustic stack. Experiments are conducted in an 18cm-long resonator operated with air at atmospheric pressure at the resonance frequency of approximately 464Hz. Drive ratios up to 3% are achieved, which corresponds to temperature oscillation amplitudes up to 2.5K. Temperature measurements are performed using a novel procedure recently proposed by Berson et al., Rev. Sci. Instrum. 81, 015102 (2010). The instantaneous temperature is measured with a cold wire operated by a Constant-Current Anemometer (CCA). In addition, we record the output signal of the same wire, under the same flow conditions — which is made possible by the periodicity of the acoustic wave — and operated in the heated mode by a Constant-Voltage Anemometer (CVA). During post-processing, the thermal inertia of the cold wire operated with the CCA is corrected using the CVA signal. This procedure does not require any physical properties of the wire such as the diameter. In addition, it does not require the knowledge of a heat-transfer/velocity relationship for the wire. This is all the most important for thermoacoustic systems since no such relationship is available in oscillating flows. Results validate the generation of temperature harmonics near the stack edges. The spatial distributions of the first and second harmonic amplitudes are compared with a one-dimensional model. The model is an extension of an analytical model from the literature [Gusev et al., J. of Sound and Vibration 235, (2000)] that takes into account axial conduction. Experimental results show an excellent qualitative agreement with the model and demonstrate the importance of axial conduction on the nonlinear thermal field behind the stack.
3
Tannus, Julia, Gabriel Cyrino, Edgard Lamounier, Alexandre Cardoso, and Alcimar Soares. "Geometric and Behavioral Modeling Techniques in Construction of a Virtual Environment for Rehabilitation of Post-CVA Patients through a Serious Game." In 2018 20th Symposium on Virtual and Augmented Reality (SVR). IEEE, 2018. http://dx.doi.org/10.1109/svr.2018.00044.
4
Hui, K. S., and Christopher Y. H. Chao. "Conversion of Coal Fly Ash Into Zeolite 4A and Its Applications in Waste Water Treatment and Greenhouse Gas Reduction." In ASME 2007 International Mechanical Engineering Congress and Exposition. ASMEDC, 2007. http://dx.doi.org/10.1115/imece2007-41361.
Abstract:
This study applied a novel conversion method to convert coal fly ash (CFA) into pure form (without mixture of CFA residue), single phase and high crystalline zeolite 4A. This novel conversion method allows a reduction by half of the total conversion time while maintaining a high degree of crystallinity of zeolite 4A which exists in a narrower particle size distribution. Applications of the CFA converted zeolite 4A (C4A) in waste water treatment of multi-heavy-metal-ions and in catalytic methane combustion were evaluated. In waste water treatment, for C4A and commercial zeolite 4A, the equilibrium sorption data were well fitted by the Langmuir model and showed the affinity order: Cu2+ > Cr3+ > Zn2+ > Co2+ > Ni2+. Compared to commercial zeolite 4A, the C4A and the treated CFA residue (TCFAR) were effective in removing multi-heavy-ions in water and could be an alternative material for treatment of wastewater. In catalytic methane combustion, post-treatment of C4A was performed to enhance catalytic activity of the catalyst. Catalytic methane combustion was conducted at atmospheric pressure and gas hourly space velocity (GHSV) between 3230 and 16150 h−1 under different lean fuel concentrations (equivalence ratio of 0.1–0.4) at 500 °C. Thermogravimetry analysis (TGA) results showed the catalyst (M(250)-C4A) could be operated at a temperature of 700 °C without damage to the zeolite structure. At 500 °C, higher combustion efficiency was achieved by either reducing the GHSV under the same fuel concentration or reducing the fuel concentration under the same GHSV. Comparing to a commercial catalyst 2%Pd/Al2O3, the catalyst (M(250)-C4A) achieved a higher methane conversion % in the GHSV range of 3230–9690 h−1. Finally, economic and environmental aspects of converting CFA to zeolite 4A were discussed.
5
Yao, Yuan, Hanghang Tong, Feng Xu, and Jian Lu. "Predicting long-term impact of CQA posts." In KDD '14: The 20th ACM SIGKDD International Conference on Knowledge Discovery and Data Mining. New York, NY, USA: ACM, 2014. http://dx.doi.org/10.1145/2623330.2623649.
6
Lin, Liwei. "MEMS Post-Packaging by Localized Heating." In ASME 2000 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/imece2000-1156.
Abstract:
Abstract This work addresses important post-packaging issues for microelectromechanical systems (MEMS) and introduces specific research directions by means of localized heating and bonding. MEMS packaging has become a major research subject due to the stringent packaging requirements in the emerging filed of MEMS. Establishing a versatile post-packaging process not only advances the field scientifically but also helps product commercialization in industry. An innovative post-packaging approach by localized heating and bonding is proposed and presented in this paper. Various post-packaging processes are demonstrated, including an integrated LPCVD (Low Pressure Chemical Vapor Deposition) sealing process, localized silicon-gold eutectic bonding, localized silicon-glass fusion bonding, localized solder bonding and localized CVD bonding processes.
7
Busnaina, Ahmed A., and Naim Moumen. "Slurry Residue Removal in Post Chemical Mechanical Polishing." In ASME 1999 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/detc99/cie-9049.
Abstract:
Abstract The megasonic cleaning process proved to be an essential process in cleaning silicon wafers after processes such as pre-oxidation, pre-CVD, pre-EPI, post-ASH and lately post-CMP. Current post-CMP cleans are contact cleaning techniques. These contact techniques have a low throughput and may cause wafer scratching. In addition, in contact cleaning, brush shedding which occurs under many operating conditions causes additional particulate contamination. There is a need for an effective post-CMP cleaning process. Megasonic cleaning provides the best alternative or compliment to brush clean.
8
Astrizi, Thiago, Ricardo Custódio, and Lucia Moura. "Post-quantum signature with preimage chameleon hashing." In Simpósio Brasileiro de Segurança da Informação e de Sistemas Computacionais. Sociedade Brasileira de Computação - SBC, 2020. http://dx.doi.org/10.5753/sbseg.2020.19228.
Abstract:
In this work, we propose a generalization of the concept of chameleon hash first described in [Krawczyk and Rabin 1998], which we call preimage chameleon hash. While in the conventional chameleon hash, the trapdoor allows a user to compute second preimages, in this generalization, it is possible to compute first preimages. We show how to adapt the post-quantum chameleon hash from [Cash et al. 2010] to a preimage chameleon hash and use this modified construction to build a new signature scheme based on [Mohassel 2011]. A preimage chameleon hash allows the signer to encode in its signature chosen information to be checked during verification. We prove our signature scheme to be strongly unforgeable under a chosen message attack (SUF-CMA).
9
Marrocco, T., D. Harvey, and T. Hussain. "Characterisation of Corrosion Resistant Deposits by Cold Gas Dynamic Spray." In ITSC2010, edited by B. R. Marple, A. Agarwal, M. M. Hyland, Y. C. Lau, C. J. Li, R. S. Lima, and G. Montavon. DVS Media GmbH, 2010. http://dx.doi.org/10.31399/asm.cp.itsc2010p0482.
Abstract:
Abstract Despite much research effort and many application development studies, corrosion resistant alloy (CRA) coatings, prepared by thermal spraying still provide greatly inferior corrosion resistance when compared to parent material of the same composition, due to a network of oxides and pores in the coatings. However, the recent development of Cold Gas Dynamic Spray (CGDS) technology has made possible the deposition of low porosity and oxide-free CRA coatings. This paper describes the corrosion performance of Ni-based Alloy 625 following cold spraying onto steel substrates both as-sprayed and following heat treatment. Microstructures and oxygen content of powders and coatings were investigated, and coating microhardness and strength were determined in both as-sprayed and post treated conditions. Mercury intrusion was used to measure the interconnected porosity in the as-deposited and post-treated coatings. Finally, the corrosion behaviour of the sprayed and post-treated coatings was measured using a standard test (ASTM B117-07a).
10
Goubergrits, L., R. Mevert, P. Yevtushenko, J. Schaller, S. Meyer, E. Riesenkampff, and T. Kuehne. "Treatment of the Aortic Coarctation: Prediction of the Hemodynamic Impact." In ASME 2013 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/sbc2013-14397.
Abstract:
Aortic coarctation (CoA) accounts for approximately 10% of congenital heart diseases 1. CoA causing high pressure gradient can be successfully treated surgical or catheter-based. Long-term results, however, revealed decreased life expectancy associated with abnormal hemodynamics 1. To develop a next-generation personalized diagnostic-prognostic tools allowing treatment optimization and thus to improve life expectance, the innovative combination of imaging science, biofluid mechanics, and computer modeling is necessary. Patient-specific computational fluid dynamics (CFD) models of the CoA based on MRI data were created to analyze pre- and post-treatment hemodynamics with a focus on pressure gradient.
Reports on the topic "Post CVA":
1
Smith, D. L. Post-decontamination and dismantlement (D&D) characterization report for CFA-669 site. Office of Scientific and Technical Information (OSTI), January 1995. http://dx.doi.org/10.2172/34454.
2
Atherosclerosis Biomarkers by Computed Tomography Angiography (CTA). Chair Andrew Buckler, Luca Saba, and Uwe Joseph Schoepf. Radiological Society of North America (RSNA) / Quantitative Imaging Biomarkers Alliance (QIBA), March 2023. http://dx.doi.org/10.1148/qiba/20230328.
Abstract:
The clinical application of Computed Tomography Angiography (CTA) is widely available as a technique to optimize the therapeutic approach to treating vascular disease. Evaluation of atherosclerotic arterial plaque characteristics is currently based on qualitative biomarkers. However, the reproducibility of such findings has historically been limited even among experts (1). Quantitative imaging biomarkers have been shown to have additive value above traditional qualitative imaging metrics and clinical risk scores regarding patient outcomes (2). However, many definitions and cut-offs are present in the current literature; therefore, standardization of quantitative evaluation of CTA datasets is needed before becoming a valuable tool in daily clinical practice. To establish these biomarkers in clinical practice, techniques are required to standardize quantitative imaging across different manufacturers with cross-calibration. Moreover, the post-processing of atherosclerotic plaque segmentation needs to be optimized and standardized. The goal of a Quantitative Imaging Biomarker Alliance (QIBA) Profile is to provide an implementation guide to generate a biomarker with an effective level of performance, mostly by reducing variability and bias in the measurement. The performance claims represent expert consensus and will be empirically demonstrated at a subsequent stage. Users of this Profile are encouraged to refer to the following site to understand the document’s context: http://qibawiki.rsna.org/index.php/QIBA_Profile_Stages. All statistical performance assessments are stated in carefully considered metrics and according to strict definitions as given in (3-8), which also includes detailed, peer-reviewed rationale on the importance of adhering to such standards. The expected performance is expressed as Claims (Section 1.2). To achieve those claims, Actors (Scanners, Reconstruction Software, Image Analysis Tools, Imaging Physicians, Physicists, and Technologists) must meet the Checklist Requirements (Section 3) covering Subject Handling, Image Data Acquisition, Image Data Reconstruction, Image QA, and Image Analysis. This Profile is at the Clinically Feasible stage (qibawiki.rsna.org/index.php/QIBA_Profile_Stages) which indicate that multiple sites have performed the Profile and found it to be practical and expect it to achieve the claimed performance. QIBA Profiles for other CT, MRI, PET, and Ultrasound biomarkers can be found at qibawiki.rsna.org
3
Hardwick, Jonathan C. Porting a Vector Library: A Comparison of MPI, Paris, CMMD and PVM (or, I'll Never Have to Port CVL Again"). Fort Belvoir, VA: Defense Technical Information Center, November 1994. http://dx.doi.org/10.21236/ada290231.
4
Fromm, A., Avihai Danon, and Jian-Kang Zhu. Genes Controlling Calcium-Enhanced Tolerance to Salinity in Plants. United States Department of Agriculture, March 2003. http://dx.doi.org/10.32747/2003.7585201.bard.
Abstract:
The specific objectives of the proposed research were to identify, clone and characterize downstream cellular target(s) of SOS3 in Arabidopsis thaliana, to analyze the Ca2+-binding characteristics of SOS3 and the sos3-1 mutant and their interactions with SOS3 cellular targets to analyze the SOS3 cell-specific expression patterns, and its subcellular localization, and to assess the in vivo role of SOS3 target protein(s) in plant tolerance to salinity stress. In the course of the study, in view of recent opportunities in identifying Ca2+ - responsive genes using microarrays, the group at Weizmann has moved into identifying Ca2+-responsive stress genes by using a combination of aqeuorin-based measurements of cytosolic Ca and analysis by DNA microarrays of early Ca-responsive genes at the whole genome level. Analysis of SOS3 (University of Arizona) revealed its expression in both roots and shoots. However, the expression of this gene is not induced by stress. This is reminiscent of other stress proteins that are regulated by post-transcriptional mechanisms such as the activation by second messengers like Ca. Further analysis of the expression of the gene using promoter - GUS fusions revealed expression in lateral root primordial. Studies at the Weizmann Institute identified a large number of genes whose expression is up-regulated by a specific cytosolic Ca burst evoked by CaM antagonists. Fewer genes were found to be down-regulated by the Ca burst. Among the up-regulated genes many are associated with early stress responses. Moreover, this study revealed a large number of newly identified Ca-responsive genes. These genes could be useful to investigate yet unknown Ca-responsive gene networks involved in plant response to stress.
5
Redhouse, Danielle. Radiation Characterization Summary: NETL Beam Port 1/5 Free-Field Environment at the 128-inch Core Centerline Adjacent (NETL-FF-BP1/5-128-cca). Office of Scientific and Technical Information (OSTI), November 2022. http://dx.doi.org/10.2172/1898256.
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LI, Zhendong, Hangjian Qiu, xiaoqian Wang, chengcheng Zhang, and Yuejuan Zhang. Comparative Efficacy of 5 non-pharmaceutical Therapies For Adults With Post-stroke Cognitive Impairment: Protocol For A Bayesian Network Analysis Based on 55 Randomized Controlled Trials. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, June 2022. http://dx.doi.org/10.37766/inplasy2022.6.0036.
Abstract:
Review question / Objective: This study will provide evidence-based references for the efficacy of 5 different non-pharmaceutical therapies in the treatment of post-stroke cognitive impairment(PSCI). 1. Types of studies. Only randomized controlled trials (RCTs) of Transcranial Magnetic Stimulation(TMS), Transcranial Direct Current Stimulation(tDCS), Acupuncture, Virtual Reality Exposure Therapy(VR) and Computer-assisted cognitive rehabilitation(CA) for PSCI will be recruited. Additionally, Studies should be available in full papers as well as peer reviewed and the original data should be clear and adequate. 2. Types of participants. All adults with a recent or previous history of ischaemic or hemorrhagic stroke and diagnosed according to clearly defined or internationally recognized diagnostic criteria, regardless of nationality, race, sex, age, or educational background. 3.Types of interventions and controls. The control group takes non-acupuncture treatment, including conventional rehabilitation or in combination with symptomatic support therapy. The experimental group should be treated with acupuncture on basis of the control group. 4.The interventions of the experimental groups were Transcranial Magnetic Stimulation(TMS), Transcranial Direct Current Stimulation(tDCS), Acupuncture, Virtual Reality Exposure Therapy(VR) or Computer-assisted cognitive rehabilitation(CA), and the interventions of the control group takes routine rehabilitation and cognition training or other therapies mentioned above that were different from the intervention group. 5.Types of outcomes. The primary outcomes are measured with The Mini-Mental State Examination (MMSE) and/or The Montreal Cognitive Assessment Scale (MoCA), which have been widely used to evaluate the cognitive abilities. The secondary outcome indicator was the Barthel Index (BI) to assess independence in activities of daily living (ADLs).
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Reid, M. S., X. Wang, N. Utting, and C. Jiang. Comparison of water chemistry of hydraulic-fracturing flowback water from two geological locations at the Duvernay Formation, Alberta, Canada. Natural Resources Canada/CMSS/Information Management, 2021. http://dx.doi.org/10.4095/329276.
Abstract:
We analyzed and compared the water chemistry between 17 Fox Creek region samples, each from a different well, and 23 Three Hills region samples from a single well. Overall, the two regions were similar in chemical composition but showed small differences in some lower abundance dissolved elements. Additionally, we investigated changes in water chemistry of FPW over time from a single well. The majority of water quality parameters and water chemistry remained constant over the 7-month sampling time. Major ion chemistry showed increasing concentrations of Ca and Mg, and a decreasing concentration of SO4. Several trace elements also showed small trends of both increasing and decreasing concentrations over time. There was a strong correlation between Ca and Mg concentrations in both the Fox Creek region samples and Three Hills region samples, which is an indication of the mixing of formation water. However, the correlation between B and Sr was different among two region samples, which is likely due to the delayed mixing of formation water with the fracturing fluids during the flowback at different time periods of post fracturing. Likewise, Fox Creek region samples showed correlations between concentrations of Cl and Ca, Na and Ca, and Na and Mg, but these correlations were not seen in the Three Hills region samples. Geochemical modeling demonstrates that there are potential scales formed in the flowback water, but most of the minerals are still in the dissolution state in the formation. Stable isotopic analysis confirmed the mixing of injection water and the formation water.
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Kim, Ann Y., Tyler Reeb, Jaylee Jordan, and Youngjin Song. Curriculum Evaluation of the Academy of Global Logistics Program: Connections to STEM Education. Mineta Transportation Institute, June 2023. http://dx.doi.org/10.31979/mti.2023.2246.
Abstract:
The Academy of Global Logistics (AGL) is a career technical education program developed in collaboration with the Port of Long Beach and the Long Beach Unified School District and with support from the Center for International Trade and Transportation. Students enrolled in the program, implemented at a high school in Long Beach, CA, learn global logistics and supply chain management over the course of their high school career. The program culminates in a capstone project that is evaluated by industry leaders. This research project applies qualitative coding methods to find connections between the AGL curriculum and CA mathematics and science curriculum standards and AGL curriculum and project-based learning. The project’s findings identified that the AGL curriculum provided students with numerous opportunities to engage in mathematics and science practices in a project-based learning environment. Recommendations for policymakers and higher education institutions are discussed in order to advocate for best practices to serve California's youth.
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Liaga, Emmaculate Asige. Towards Local Approaches and Inclusive Peacebuilding in South Sudan. RESOLVE Network, October 2021. http://dx.doi.org/10.37805/pn2021.24.lpbi.
Abstract:
The post-liberation peacebuilding in South Sudan, which largely drew from liberal peace theory, was employed between 2005 (after the signing of the Comprehensive Peace Agreement (CPA) and before the referendum, secession, and independence in 2011) and December 2013 (when it imploded into a civil conflict) and proved insufficient to sustain the fragile peace that briefly existed after the country’s secession from Sudan. After a protracted conflict lasting almost half a decade and the presence of multiple peace actors, the lack of a comprehensive and coordinated peacebuilding strategy proved detrimental. This failure is partly due to poor coordination between stakeholders and lack of local/domestic legitimacy, leading to insufficient peacebuilding and an aggravation of the 2013 conflict. Over the years, liberal peacebuilding strategies, which emphasize formal institution-building and statebuilding in fragile and conflict-affected environments, continue to produce mixed to poor results and fragile peace. This decline has resulted in the shifting of discourses and operations within peacebuilding, a paradigm shift that pays greater attention to localization and the local context in the conceptualization of peacebuilding objectives and strategies. This transformation promotes local ownership and inclusivity in peace processes and their dividends. The dialogue on inclusive peace has thus gained momentum, bearing a need to fully engage both states and societies in this process. The “local” in peacebuilding forms an important resource when solving root causes of conflicts, as in South Sudan, by improving awareness of the cultural and historical diversity in a given context.
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Selvaraju, Ragul, Hari Shankar, and Hariharan Sankarasubramanian. Metamodel Generation for Frontal Crash Scenario of a Passenger Car. SAE International, September 2020. http://dx.doi.org/10.4271/2020-28-0504.
Abstract:
A frontal impact scenario was simulated using a Finite Element Model of a Hybrid III 50th percentile male (LSTC, Livermore CA) along with seatbelt, steering system and driver airbags. The boundary conditions included acceleration pulse to the seat and the outputs including injury measures in terms of Head Injury Criterion (HIC), Normalized Neck Injury Criterion (NIJ) and Chest Severity Index (CSI) were extracted from the simulations. The kinematics of the Hybrid III were validated against the kinematics of post mortem human surrogates (PMHS) available in the literature. Using the validated setup, metamodels were generated by creating a design of varying different parameters and recording the responses for each design. First, the X and Z translation of dummy along the seat is provided as input for which there was no variation in the head injury criterion (HIC). Next, the input pulse to the seat is parameterized along with the seatbelt loading and the results are obtained respectively. The outputs, in terms of injury measures, are generated in the form of metamodels as a function of the parameters. The occupant model used for the frontal crash scenario in LS-Dyna is validated against the previously available crash experimental data. A total of 100 design points was generated with a varying combination of parameters. An increase in various injury measures was observed with an increase in the scale factor of the acceleration pulse. Also, it was found that chest severity index increased with an increase in the scale factor of the seat belt loading force.