L'utilisation d'alliages de magnésium est d'un intérêt majeur pour l’allègement des structures dans le domaine aéronautique. Leur principal inconvénient est leur forte oxydation rendant leur coulée hasardeuse. Aujourd'hui, l’association de la simulation numérique avec les procédés automatisés d'impression 3D de moule en sable et de coulée Basse-Pression (BP) promet l’amélioration de la robustesse de fabrication tout en limitant les itérations à l’échelle industrielles. Toutefois, ces méthodes récentes souffrent d’un manque de données sur la préparation et la génération des défauts lors du remplissage des alliages comme le RZ5.Dans ce travail, après avoir défini dans quelle mesure les règles métiers actuelles de préparation des alliages Mg-Zr sont adaptées au procédé BP, des essais de coulabilité expérimentaux à l’échelle industrielle ont été développés. L’analyse des données expérimentales et de simulations numériques des écoulements permettent d’établir des modèles analytiques de prédiction du risque inclusions d’oxydes et de malvenue. Ces modèles sont utilisés pour proposer une cartographie du procédé limitant les défauts de remplissage, et pour définir une méthodologie de conception des grappes de coulée spécifique à la BP appliquée sur une pièce industrielle en RZ5. / The use of magnesium alloys has a considerable interest to reduce the mass of components in the aeronautics industry. The main drawback of magnesium alloys is their high oxidization leading to hazardous casting conditions. Nowadays, a renewed interest for magnesium alloys is related to the association of casting simulation software with Low-Pressure Casting (LPC) and sand printing. It should improve process robustness and limit the part design iterations. Nevertheless, these recent process lack of data on melt refining and the castability of magnesium alloy as RZ5 in LPC.This work proposes an experimental analysis of the actual Mg-Zr refining rules to define in what extent they are suitable in LPC process. Experimental castability tests at the industrial scale are then developed and they are compared with fluid flow simulations. They permit to establish analytical models of oxide inclusions and misrun predictions to define a process map limiting these defects. A specific LPC part design methodology is proposed and is applied on an industrial part.

Cukrinis diabetas dažnai yra laikomas civilizacijos liga ir vienas sudėtingiausių klinikinės medicinos uždavinių specialistams, kurie rūpinasi jos gydymu. Tai lėtinė liga, trunkanti visą žmogaus gyvenimą nuo jos nustatymo dienos. Ji siejama su vakarietiškos gyvensenos plitimu: urbanizacija, populiacijos ir jos amžiaus didėjimu, stresais, socialiniais veiksniais, netinkamais mitybos įpročiais, mažu judrumus ir nutukimu. Raktiniai žodžiai : Cukrinis diabetas, masažas, kraujospūdis, gliukozė. Tyrimo objektas – masažo įtaka asmenims sergantiems cukriniu diabetu Tyrimo tikslas – ištirti masažo poveikį asmenims sergantiems cukriniu diabetu Tyrimo uždaviniai – 1) išanalizuoti cukrinio diabeto tipus ir eigą. 2) Apibendrinti masažo poveikį asmenims, sergantiems cukriniu diabetu. 3) Ištirti masažo poveikį kraujospudžiui ir cukraus kiekiui asmenims, sergantiems cukriniu diabetu. Tyrimas atliktas Lietuvos sporto universitete. Tyrime dalyvavo 9 moterys ir 1 vyras sergantys cukriniu diabetu. Išvada: Masažas veikia visas žmogaus funkcijas ir sistemas. Masažo poveikis žmonėms, sergantiems cukriniu diabetu teikia daug naudos, tačiau jie yra labai panašūs į bendrą masažo naudą. Masažas mažina kraujospūdį, skatina cukraus pasisavinimą raumenyse, pagerina insulino kasos aparato funkcijas, didina darbingumą, pagerina kraujo ir limfos apytaką audiniuose. Taip pat masažas mažina cukraus kiekį kraujyje. / Diabetes is often regarded as a disease of civilization and one of the toughest clinical challenges professionals who are taking care of her treatment. It is a chronic disease, lasting for the entire human life from its imposition. It is associated with the spread of Western lifestyles: urbanization, population growth and age, stress and social factors, poor eating habits, obesity, and low mobility. Keywords: Diabetes mellitus, massage, blood presure, glucose. The object of investigation: massage on individuals with diabetes The purpose of investigation: to explore massage on individuals with diabetes The tasks: 1) To analyze the type of diabetes and the course. 2) Summarize massage on individuals with diabetes mellitus. 3) To investigate the effect of massage on blood pressure and sugar level in individuals with diabetes mellitus. The study was conducted at the University of Lithuania sport. The study included nine women and one man with diabetes mellitus. Conclusion: Massage is all human functions and systems. Massage in humans with diabetes provides many benefits, but they are very similar to the overall benefits of massage. Massage lowers blood pressure, stimulates sugar uptake in muscles, improves insulin cash register functions, increases efficiency, improves blood and lymph tissues. Massage also lowers blood sugar levels.

Potential risk factors for development of Post-Traumatic Stress Disorder (PTSD) are still unclear. One potential risk factor for the development of PTSD is an individual’s cardiovascular reactivity and recovery in response to stressor tasks. The current study was conducted with 763 Army National Guard and Army Reserve soldiers. Participants completed a stressful induction along with self-report measures prior to deployment. Post-deployment, self-report measures were completed to assess PTSD symptomatology and experiences related to deployment and combat. Multiple regression was used to determine the ability of blood pressure response to stress to predict PTSD symptoms immediately and one-year after return from deployment. Results indicated that soldiers who had a less reactive systolic blood pressure response to and recovery from stressor tasks reported more PTSD symptomatology immediately after and one year after return from deployment. These results suggest that soldiers who develop PTSD after deployment have less pre-deployment emotion regulation ability.

A common problem associated with patient handling is the risk of bodily injury due to acute or cumulative trauma. The objective of this research was to develop an integrated solution, using commercially available components, to help health care providers handle patients in a safe manner. The objective was achieved by retrofitting a mannequin with flex sensors, electrogoniometers, pressure sensors, and photocells. The sensors were capable of quantifying angular displacement, skin pressure distribution and undignified exposure. All of these variables were monitored by a computer-based data acquisition system. The design of this integrated system was implemented using National Instruments LabView software, which possessed the capability to provide both spasm simulation process control and a history of the acquired sensor data. A virtual instrument, (VI), was developed using LabView as the interface between the user or instructor and the instrumented mannequin. The VI had the capability of displaying the history of the acquired data. With access to the data's history the trainer is able to analyze the sensor information and verify the procedural accuracy of the actions performed on the simulated patient by the student. The system technologies employed can help the instructor improve the training of health care workers. Additionally, providing the trainer with useful information about the student's skill building during interaction with a patient enhances evaluation of the student's performance. Once the data is collected, the instrumented mannequin is capable of identifying problems such as excessive force or pressure when health care providers are interacting with patients. This provides the healthcare community with useful information to improve and provide a safer and more comfortable environment for the patient. The instrumented mannequin will be a valuable tool in evaluating and assessing the merits of clinical procedures. It may also be used in biomechanical studies involving patient handling by caregivers.

The clinical hallmark of acute myocardial infarction is chest pain, typically located in the substernal region or sometimes in the epigastrium which frequently radiates to the neck, left arm and left shoulder. Anginal equivalents such as dyspnoea and epigastric discomfort may also occur. The physical findings can include diaphoresis, pale cool skin, sinus tachycardia and sometimes hypotension. The objective of my thesis is to describe the health-social overall impact. I have been interested in acute myocardial infarction problems since my first education as a rescuer. I used the method of classificatory frequency analysis of documents, comparing and analogy results each other. The main task was to show how the people live after acute myocardial infarction, if they are able to work or not. Graphical analysis shows patient{\crq}s social anamnesis, productivity, gender ratio and etc. Sample for analysis forms 109 patients, from that 16 forms employment history results, which are made separate.

Objetivo: O presente estudo investigou as respostas hemodinâmicas agudas da pressão arterial sistólica (PAS), pressão arterial diastólica (PAD) e frequência cardíaca (FC), imediatamente e nas 24 horas após o exercício, em idosas hipertensas, submetidas a 3 tipos de exercícios físicos e um momento controle (C). Métodos: Participaram do estudo 30 idosas hipertensas sob terapia medicamentosa. Todas as idosas foram submetidas aos protocolos de exercício aeróbio contínuo (AC), exercício aeróbio intervalado (AI), exercício resistido (ER) e a (C), com o intervalo mínimo de 7 dias para assegurar o efeito agudo de cada intervenção, em ordem randomizada. Todas as participantes foram submetidas previamente ao teste ergométrico, utilizando-se o protocolo de rampa devido a sua melhor acurácia para a população em estudo. A prescrição do AC e do AI foi feita por meio da frequência cardíaca máxima (FCM) obtida no teste. Na intervenção do AC foi calculada a frequência cardíaca de treinamento (FCT), com a intensidade de 70% FCM, com duração de 40 minutos de exercício. No AI foi utilizado a alternância de 80% da FCM no período de condicionamento, durante 2 minutos, e 60% da FCM, durante 2 minutos, para o período de recuperação, com duração de 40 minutos de exercício. O ER foi conduzido após obtenção de uma repetição máxima (1RM) em três exercícios para os principais grupos musculares: chest press, leg press e remada sentada e mais seis exercícios resistidos comumente utilizados para a prescrição do treinamento de força nas academias, utilizando o número de repetições adequadas por meio da escala de percepção subjetiva de esforço (PSE). A intensidade do ER foi de 50% de 1RM para dez repetições para o aquecimento específico e, após 1 minuto, a carga era ajustada para 70% de 1RM e realizava-se uma série entre 6 e 10 repetições para o condicionamento em todos os exercícios. Os valores da PAS, PAD e FC foram obtidos antes e após as sessões dos exercícios pelo método oscilométrico e, após cada sessão era realizada a monitorização ambulatorial da pressão arterial (MAPA) de 24 horas nos 4 momentos. Os dados foram avaliados pelo modelo de efeitos mistos. Resultados: Os dados obtidos no período pré e pós exercícios, mostraram redução em menor valor da variável PAS após a realização do AI e AC comparados ao ER no momento pós exercício (p<0,01). Na FC foi observado aumento no período pós exercício em AI e AC em comparação com ER e de ER em relação ao C (p<0,01). As observações nas 24 horas subsequentes foram obtidas por meio da MAPA, com maior redução da PAS em AI nas 24 horas do que nos outros grupos, sendo a redução da PAS em ER também maior do que em AC e C (p<0,01). Na PAD, a redução em AI e ER foram similares. Considerando apenas o período de vigília, a redução de PAS em AI foi superior aos outros grupos. No período de sono, AI e ER promoveram maiores reduções na PAS, com maior redução da variável PAD em ER (p<0,01). Conclusão: A prática de exercício físico intervalado e resistido promovem maior hipotensão pósexercício (HPE) ao longo das 24 horas subsequentes, em relação ao AC e C. O exercício aeróbio contínuo promove apenas redução da pressão arterial nas primeiras horas após o exercício. / Objective: The present study investigated the acute hemodynamic responses of systolic blood pressure (SBP), diastolic blood pressure (DBP) and heart rate (HR), immediately and within 24 hours after exercise, in hypertensive elderly women submitted to 3 types of physical exercise and control. Methods: Thirty hypertensive elderly women in drug therapy participated of the study. They all underwent to continuous aerobic exercise (CA), interval aerobic (IA), resistance exercise (RE) and control (C), with a minimum interval of 7 days, in random order. All participants were previously submitted to the treadmill stress test, using the ramp protocol due to its better accuracy for the study population. The prescription of the CA and the IA was done by maximum heart rate (MHR) obtained by the test. In the CA intervention, training heart rate (THR) was calculated, with the intensity of 70% MHR, with duration of 40 minutes of exercise. In the IA, we used 80% of the MHR during the conditioning period for 2 minutes and 60% of the MHR during 2 minutes for the recovery period, lasting 40 minutes. The ER was conducted after obtaining a maximal repetition (1RM) in three exercises for the main muscle groups: chest press, leg press and seated paddling, and six more commonly used resistance exercises for the prescription of strength training in the academies, using the number of adequate repetitions through the subjective perception of effort scale (PES). The RE intensity was 50% of 1RM for ten replicates for the specific heating and after 1 minute the load was adjusted to 70% of 1RM, and a range of 6 to 10 replicates were performed for the conditioning. The SBP, DBP and HR values were obtained before and after the exercise sessions by the oscillometric method and after that, 24-hour ambulatory blood pressure monitoring (ABPM) was performed in the 4 moments. The data were evaluated by the mixed effects model. Results: Data obtained in the pre and post exercise period showed a decrease in the SBP variable after IA and CA compared to the RE (p <0.01). In the HR, we observed increase in the post-exercise period in IA and CA compared to RE and RE in relation to C (p <0.01). The observations in the subsequent 24 hours were obtained through ABPM, with a greater fall in SBP in IA in 24 hours than in the other groups, with a decrease in RE also greater than in CA and C (p <0.01). In DBP, IA and RE fall were similar. Considering only the waking period, the SBP decrease in IA was higher than the other groups. In the sleep period, IA and RE promoted fall in SBP, with a greater fall in DBP in RE (p <0.01). Conclusion: The practice of interval aerobic and resistance exercise promoted greater post-exercise hypotension (PEH) during the subsequent 24 hours, compared to CA and C. Continuous aerobic exercise promotes only drop in the first hours after exercise.

Syfte: Syftet med denna studie var att undersöka hur statisk muskelkontraktion och cold pressor test påverkar kroppsegna smärtreglerande system (”Exercise induced analgesia” (EIA) och ”Conditioned pain modulation” (CPM)) hos patienter med kronisk ländryggssmärta kännetecknad av lumbal myalgi (LM) jämfört med friska kontroller. Försökspersoner och metod: Tjugosex friska köns- och åldersmatchade personer och tjugosex LM-patienter deltog. De utförde standardiserad statisk muskelkontraktion med m. Erector spinae (ME) i form av rygglyft och kontraktion av m. Quadriceps femoris (MQ) i form av knäledsextension. För att bedöma CPM användes sk cold pressor test. Smärttrösklar för tryck (PPTs) mättes över m. Deltoideus (MD), m. Erector spinae (ME) samt över m. Quadriceps (MQ) i vila och under resp. efter kontraktionen/cold pressor test. Under kontraktion mättes PPTs över den arbetande muskeln respektive över de två vilande musklerna. Dessutom undersöktes PPTs och känsligheten för övertrösklig trycksmärta (P7) i vila på 8 olika punkter på kroppen. Resultat: Kvinnliga LM-patienter hade ökad känslighet för trycksmärta (PPT) och övertrösklig trycksmärta (P7) jämfört med köns- och åldermatchade friska kontroller, medan manliga LM-patienter paradoxalt nog hade minskad känslighet för övertrösklig trycksmärta. Beträffande EIA fann vi att LM-patienter och kontroller kunde aktivera lokal EIA under kontraktion med ME. Vi fann dessutom en minskad förmåga hos LM-patienter att rekrytera generaliserad EIA under kontraktion med MQ. Slutligen hade LM-patienterna en normal funktion av CPM. Slutsats: LM-patienter kunde aktivera lokal EIA under kontraktion av ME, men hade mindre effektiv generaliserad EIA jämfört med kontrollerna, trots normal funktion av CPM. Våra resultat tyder på att muskelarbete med smärtande ryggmuskler skulle kunna användas för att minska smärtkänslighet i det drabbade området.

Objetivo: O presente estudo investigou as respostas hemodinâmicas agudas da pressão arterial sistólica (PAS), pressão arterial diastólica (PAD) e frequência cardíaca (FC), imediatamente e nas 24 horas após o exercício, em idosas hipertensas, submetidas a 3 tipos de exercícios físicos e um momento controle (C). Métodos: Participaram do estudo 30 idosas hipertensas sob terapia medicamentosa. Todas as idosas foram submetidas aos protocolos de exercício aeróbio contínuo (AC), exercício aeróbio intervalado (AI), exercício resistido (ER) e a (C), com o intervalo mínimo de 7 dias para assegurar o efeito agudo de cada intervenção, em ordem randomizada. Todas as participantes foram submetidas previamente ao teste ergométrico, utilizando-se o protocolo de rampa devido a sua melhor acurácia para a população em estudo. A prescrição do AC e do AI foi feita por meio da frequência cardíaca máxima (FCM) obtida no teste. Na intervenção do AC foi calculada a frequência cardíaca de treinamento (FCT), com a intensidade de 70% FCM, com duração de 40 minutos de exercício. No AI foi utilizado a alternância de 80% da FCM no período de condicionamento, durante 2 minutos, e 60% da FCM, durante 2 minutos, para o período de recuperação, com duração de 40 minutos de exercício. O ER foi conduzido após obtenção de uma repetição máxima (1RM) em três exercícios para os principais grupos musculares: chest press, leg press e remada sentada e mais seis exercícios resistidos comumente utilizados para a prescrição do treinamento de força nas academias, utilizando o número de repetições adequadas por meio da escala de percepção subjetiva de esforço (PSE). A intensidade do ER foi de 50% de 1RM para dez repetições para o aquecimento específico e, após 1 minuto, a carga era ajustada para 70% de 1RM e realizava-se uma série entre 6 e 10 repetições para o condicionamento em todos os exercícios. Os valores da PAS, PAD e FC foram obtidos antes e após as sessões dos exercícios pelo método oscilométrico e, após cada sessão era realizada a monitorização ambulatorial da pressão arterial (MAPA) de 24 horas nos 4 momentos. Os dados foram avaliados pelo modelo de efeitos mistos. Resultados: Os dados obtidos no período pré e pós exercícios, mostraram redução em menor valor da variável PAS após a realização do AI e AC comparados ao ER no momento pós exercício (p<0,01). Na FC foi observado aumento no período pós exercício em AI e AC em comparação com ER e de ER em relação ao C (p<0,01). As observações nas 24 horas subsequentes foram obtidas por meio da MAPA, com maior redução da PAS em AI nas 24 horas do que nos outros grupos, sendo a redução da PAS em ER também maior do que em AC e C (p<0,01). Na PAD, a redução em AI e ER foram similares. Considerando apenas o período de vigília, a redução de PAS em AI foi superior aos outros grupos. No período de sono, AI e ER promoveram maiores reduções na PAS, com maior redução da variável PAD em ER (p<0,01). Conclusão: A prática de exercício físico intervalado e resistido promovem maior hipotensão pósexercício (HPE) ao longo das 24 horas subsequentes, em relação ao AC e C. O exercício aeróbio contínuo promove apenas redução da pressão arterial nas primeiras horas após o exercício. / Objective: The present study investigated the acute hemodynamic responses of systolic blood pressure (SBP), diastolic blood pressure (DBP) and heart rate (HR), immediately and within 24 hours after exercise, in hypertensive elderly women submitted to 3 types of physical exercise and control. Methods: Thirty hypertensive elderly women in drug therapy participated of the study. They all underwent to continuous aerobic exercise (CA), interval aerobic (IA), resistance exercise (RE) and control (C), with a minimum interval of 7 days, in random order. All participants were previously submitted to the treadmill stress test, using the ramp protocol due to its better accuracy for the study population. The prescription of the CA and the IA was done by maximum heart rate (MHR) obtained by the test. In the CA intervention, training heart rate (THR) was calculated, with the intensity of 70% MHR, with duration of 40 minutes of exercise. In the IA, we used 80% of the MHR during the conditioning period for 2 minutes and 60% of the MHR during 2 minutes for the recovery period, lasting 40 minutes. The ER was conducted after obtaining a maximal repetition (1RM) in three exercises for the main muscle groups: chest press, leg press and seated paddling, and six more commonly used resistance exercises for the prescription of strength training in the academies, using the number of adequate repetitions through the subjective perception of effort scale (PES). The RE intensity was 50% of 1RM for ten replicates for the specific heating and after 1 minute the load was adjusted to 70% of 1RM, and a range of 6 to 10 replicates were performed for the conditioning. The SBP, DBP and HR values were obtained before and after the exercise sessions by the oscillometric method and after that, 24-hour ambulatory blood pressure monitoring (ABPM) was performed in the 4 moments. The data were evaluated by the mixed effects model. Results: Data obtained in the pre and post exercise period showed a decrease in the SBP variable after IA and CA compared to the RE (p <0.01). In the HR, we observed increase in the post-exercise period in IA and CA compared to RE and RE in relation to C (p <0.01). The observations in the subsequent 24 hours were obtained through ABPM, with a greater fall in SBP in IA in 24 hours than in the other groups, with a decrease in RE also greater than in CA and C (p <0.01). In DBP, IA and RE fall were similar. Considering only the waking period, the SBP decrease in IA was higher than the other groups. In the sleep period, IA and RE promoted fall in SBP, with a greater fall in DBP in RE (p <0.01). Conclusion: The practice of interval aerobic and resistance exercise promoted greater post-exercise hypotension (PEH) during the subsequent 24 hours, compared to CA and C. Continuous aerobic exercise promotes only drop in the first hours after exercise.

Hurricane is one of the most destructive and costly natural hazard to the built environment and its impact on low-rise buildings, particularity, is beyond acceptable. The major objective of this research was to perform a parametric evaluation of internal pressure (IP) for wind-resistant design of low-rise buildings and wind-driven natural ventilation applications. For this purpose, a multi-scale experimental, i.e. full-scale at Wall of Wind (WoW) and small-scale at Boundary Layer Wind Tunnel (BLWT), and a Computational Fluid Dynamics (CFD) approach was adopted. This provided new capability to assess wind pressures realistically on internal volumes ranging from small spaces formed between roof tiles and its deck to attic to room partitions. Effects of sudden breaching, existing dominant openings on building envelopes as well as compartmentalization of building interior on the IP were systematically investigated. Results of this research indicated: (i) for sudden breaching of dominant openings, the transient overshooting response was lower than the subsequent steady state peak IP and internal volume correction for low-wind-speed testing facilities was necessary. For example a building without volume correction experienced a response four times faster and exhibited 30-40% lower mean and peak IP; (ii) for existing openings, vent openings uniformly distributed along the roof alleviated, whereas one sided openings aggravated the IP; (iii) larger dominant openings exhibited a higher IP on the building envelope, and an off-center opening on the wall exhibited (30-40%) higher IP than center located openings; (iv) compartmentalization amplified the intensity of IP and; (v) significant underneath pressure was measured for field tiles, warranting its consideration during net pressure evaluations. The study aimed at wind driven natural ventilation indicated: (i) the IP due to cross ventilation was 1.5 to 2.5 times higher for Ainlet/Aoutlet>1 compared to cases where Ainlet/AoutletCFD based IP responses. Comparisons with ASCE 7-10 consistently demonstrated that the code underestimated peak positive and suction IP.

Text in Afrikaans / Die doel van hierdie studie was om te bepaal waarom kinders uit kinderhuise wegloop en om voorstelle ter voorkoming daarvan te maak. Ten opsigte van die fenomeen "wegloop" stateer die literatuur dat kinders wegloop vanaf onaangename omstandighede en/of wegloop na aangename omstandighede. Die belewing van gesinstres, gesinskonflik, portuurgroepdruk, utopiese voorstellings van wegloop, onaangename skoolbelewing en tiener swangerskap is aangeduide rolspelers onderliggend aan bogenoemde. Die empiriese studie na wegloop uit kinderhuise bet aan die lig gebring dat kinders uit kinderhuise wegloop weens traumatiese belewing van verwydering uit die ouerhuis, etikettering en inrigtingsversadiging. Voorts is bevind dat faktore wat onderliggend aan bogenoemde is, tot 'n groot mate voorkom kan word. Sekere aanbevelings ter voorkoming van wegloop uit kinderhuise is na aanleiding van die studie gedoen en kan gebruik word in die volwassene se bemoeienis met die kinderhuiskind. / The object of the study was to identify the reasons why children run away from children's homes and to make recommendations on how to prevent them from running away. On considering "run away" as a phenomenon, the literature states that children run away from harsh circumstances to acceptable or pleasant circumstances. Experiences such as family stress, conflict in the family, peer group pressure, romanticising the idea, harsh school experiences and teenage pregnancies are roll players subjacent to the above mentioned. The empirical study of "running away from children's homes" has confirmed that children run away because of traumatic separation from parental homes, labelling and institutional intolerance. Furthermore it was also found that factors subjacent to the above mentioned can be neutralised to a large extent. Certain guidelines have been recommended for adults when confronted with children in children's homes. / Psychology of Education / M. Ed. (Voorligting)