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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
101

9-11 klasių berniukų staigiosios jėgos ir fizinio pajėgumo ryšys / The relation between the explosive strength and physical capacity for 9-11 grade boys

Matutis, Raimondas 06 September 2013 (has links)
Darbo objektas – 9 – 11 klasių berniukų staigiosios jėgos ir fizinio pajėgumo ryšys. Tyrimo tikslas – nustatyti 9-11 klasių berniukų fizinio pajėgumo ir staigiosios jėgos ryšį. Tyrimo uždaviniai: 1. Nustatyti 9-11 klasių berniukų fizinį pajėgumą. 2. Nustatyti 9-11 klasių berniukų staigiąją jėgą. 3. Nustatyti berniukų fizinio pajėgumo ir staigiosios jėgos ryšį. Hipotezė – tarp fizinio pajėgumo ir staigiosios jėgos yra ryšys. Pagrindiniai tyrimo rezultatai. Naudojant EUROFIT (2002) orientacines vertinimo skales buvo orientuotasi kokiam vertinimo lygiui galima priskirti rezultatų vidurkius. Palyginus visus testų rezultatus, galime teigti, kad geriausiai išlavintas berniukų lankstumas – 5,7 balo (testas „Sėstis/siekti“). Vertinant pagal Lietuvos gyventojų fizinio pajėgumo testavimo ir fizinės būklės nustatymo metodiką (2007), lankstumas būtų patenkinamas, jei tai yra 25,8 cm. Blogiausiai išlavinta širdies ir kvėpavimo sistemos ištvermė - 3,9 balo (testas „20 m bėgimas šaudykle“). Išvados: 1. Nustatyta, kad tiriamųjų 9-11 klasių berniukų fizinio pajėgumo testų rezultatai buvo vidutiniai 5,1 balo vertinant pagal moksleivių fizinio pajėgumo moksleivių fizinio pajėgumo referencines skales: 10x5 m bėgimas šaudykle (vikrumas) – 5,4 balai, sėstis/gultis (liemens jėga) – 5,3 balai, sėstis/siekti (lankstumas) – 5,7 balai, 20 m bėgimas šaudykle (širdies ir kvėpimo sistemos ištvermės) – 3,9 balai. 2. 9-11 klasių berniukų šuolis į tolį iš vietos (staigioji jėga) testo rezultatas buvo... [toliau žr. visą tekstą] / The object of the research – the relation between the explosive strength and physical capacity for 9-11 grade boys. The purpose of the research – to identify the liaison between the explosive strength and physical capacity in the group of 9-11 grade boys. The objectives of the research: 1. To find out what is the physical capacity of the 9-11 grade boys. 2. To identify the level of the explosive strength of the 9-11 grade boys. 3. To identify the liaison between the explosive strength and physical capacity in the group of 9-11 grade boys. The hypothesis - that there is a liaison between physical capacity and explosive strength. The main results of the research. Using EUROFIT (2002) reference scales it was concentrated on which evaluation level we can attribute the averages of the results. After comparing the results of all the tests, we can see that the best educated skill of boys is flexibility – 5,7 points (test „Sit/Reach“). Based on „Lithuanian population physical fitness testing and physical methodologies, 2007“, the flexibility is average if it is 25,8 cm. The worst educated skill for boys is heart and breathing endurance – 3,9 points (test „20min shuttle run“). Conclusion: 1. It was found out that physical capcity tests results for the respondents in the group of 9-11 grade boys are in average 5,1 points based on the reference tables for students‘ physical capacity: 10x5 m shuttle run (agility) - 5.4 points, sit / lie (waist strength) - 5.3 points, to sit / reach... [to full text]
102

Raseinių "Rasų" vyrų krepšinio komandos parengiamojo periodo analizė / Pre-season analysis of Raseiniu "Rasai" mens basketball team

Vilimas, Robertinas 10 September 2013 (has links)
Tyrimo tikslas – Ištirti Raseinių „Rasų“ vyrų krepšinio komandos greitumo jėgos (20 m bėgimas), jėgos greitumo (20 m bėgimas su 5 proc. kūno masės svorio slide) bei staigumo jėgos (20 m bėgimas su krypties keitimu) rodiklius parengiamąjame periode. Hipotezė: Manome, kad dėl mūsų taikytos specializuotos krepšinio programos Raseinių „Rasų“ vyrų krepšinio komandos greitumo jėgos, jėgos greitumo bei staigumo jėgos testų rodikliai parengiamąjame periode gerės ir prieš varžybinį periodą bus patys geriausi. Tyrimo metodika ir organizavimas. Mūsų organizuotame tyrime dalyvavo 10 Regionų krepšinio lygoje dalyvaujančios Raseinių „Rasai“ komandos žaidėjų. Pirmojo testavimo metu krepšininkai atliko 20 m bėgimo, 20 m bėgimo su krypties keitimu ir 20 m bėgimo su 5% kūno masės svorio slide testus. Po šių testų sekė parengiamojo etapo treniruočių programa. Antrojo testavimo metu atlikti testai buvo identiški pirmąjam testavimui. Bėgimuose krepšininkams buvo leidžiama atlikti po du bandymus, statistinei analizei buvo naudojamas aukštesnis rezultatas. Uždaviniai: 1. Ištirti Raseinių „Rasų“ komandos greitumo jėgos rodiklio kaitą parengiamąjame periode. 2. Ištirti Raseinių „Rasų“ komandos jėgos greitumo rodiklio kaitą parengiamąjame periode. 3. Ištirti Raseinių „Rasų“ komandos staigiosios jėgos rodiklio kaitą parengiamąjame periode. Rezultatai. Tyrimo rezultatai parodė, kad po dviejų mėnesių trukmės treniruočių programos komandos žaidėjų greitumo... [toliau žr. visą tekstą] / Aim: The aim of this study was to investigate changes of speed strength (20 m dash), strength speed (20 m dash with sled 5% of bodyweight) and explosive strength (20 m run with change of direction) in pre-season of Raseiniu „Rasai“ mens‘s basketball team. Methods. 10 male team Raseiniu “Rasai“ basketball players attended our organized research. In first testing, players did 20 m dash, 20 m dash with sled 5% of bodyweight and 20 m run with change of direction. After these tests, players did pre-season training program. In second test, players did the exactly same tests they did before. Basketball players were allowed to make two runs, better result was taken for statistical analysis. Hypothesis: We presume that our training programme will have tendency to improve speed strength, strength speed and explosive strength indicators in Raseiniu „Rasai“ mens‘s basketball team during the pre-season period and will be the best before the competition stage. Proposition: 1. To examine Raseiniu „Rasai“ team speed strenght index alternation in pre-season. 2. To examine Raseiniu „Rasai“ team strenght speed index alternation in pre-season. 3. To examine Raseiniu „Rasai“ team explosive strenght index alternation in pre-season. Results: Test results show that after two months of pre-season training program team players increased their averange speed strenght by 0.57 percent., but no significant changes were found (p > 0,05). Strenght speed indicator significantly (p < 0,05) enhaced... [to full text]
103

DEVELOPMENT OF 15 PSI SAFE HAVEN POLYCARBONATE WALLS FOR USE IN UNDERGROUND COAL MINES

Meyr, Rex Allen, Jr. 01 January 2013 (has links)
Following three major mining accidents in 2006, the MINER Act of 2006 was enacted by MSHA and required every underground coal mine to install refuge alternatives to help prevent future fatalities of trapped miners in the event of a disaster. The following research was performed in response to NIOSH’s call for the investigation into new refuge alternatives. A 15 psi safe haven polycarbonate wall for use in underground coal mines was designed and modeled using finite element modeling in ANSYS Explicit Dynamics. The successful design was tested multiple times in both half-scale and small scale using a high explosive shock tube to determine the walls resistance to blast pressure. The safe haven wall design was modeled for an actual underground coal mine environment to determine any responses of the wall within a mine. A full scale design was fabricated and installed in an underground coal mine to determine any construction constraints and as a final step in proof of concept for the safe haven design.
104

The effects of a combined resisted jump training and rugby-conditioning program on selected physical, motor ability and anthropometric components of rugby players / Jacobus Johannes Oosthuizen

Oosthuizen, Jacobus Johannes January 2013 (has links)
Plyometrics is primarily used by coaches and sport scientists to improve explosive power among athletes who participate in dynamic, high intensity type of sports. One of the plyometric-related training methods that has received attention in recent years, is loaded or resistance (resistive) jump training. Limited research does, however, exist with regard to the benefits and use of this training method as well as in conjunction with other training methods, especially among team sport participants. It is against this background that the research objectives of this study were firstly, to examine the effects of a 4-week combined rugby-conditioning and resisted jump training program compared to a combined rugby-conditioning and normal jump training program, on selected physical, motor ability and anthropometric components of university-level rugby players. The second objective was to examine the acute effects of a resisted compared to a normal jump training session on selected physical and motor ability components of university-level rugby players. Thirty rugby players (age: 19.60 ± 0.79 years) from the first and second u/19 and u/21 rugby teams of a university in South Africa were randomly selected to participate in the first part of study. For the second part of the study thirty senior rugby players (1st and 2nd senior teams) (age: 21.78 ± 1.86 years) of the Rugby Institute at a university in South Africa were randomly selected to participate in the study. For both studies the thirty players were in turn randomly divided into two groups of fifteen players each. One group formed the experimental and the other group the control group. The first objective was tested by subjecting the players to a 4-week combined sport-specific and resisted plyometric training program (experimental group) or a combined sport-specific and normal plyometric training program to investigate the adaptations of body composition, lower body flexibility, explosive leg power, speed, agility and leg strength. After a 10-week period (“wash-out period”) during which subjects continued with their normal rugby-conditioning program, the same testing procedures as before, were executed by following a crossover design. In order to test the second objective of the study players’ body weight and height were firstly measured after which they were subjected to a thorough warm-up, followed by the execution of the flexibility;Vertical Jump Test (VJT); 5-, 10- and 20 m speed tests; the Illinois Agility Run Test (IART) and the 6RM (repetition maximum) Smith Machine Squat Test (6RM-SMST). The experimental group was subject to the resisted jump training session on the Vertimax whereas the control group executed the same exercises on the floor. Directly after the training session each of the players again completed the test battery. After the first week, a crossover design was implemented. Although the overall study (independent t-test and main effect ANOVA) results of the first study suggested that the experimental group experienced more positive changes, especially with regard to the body fat, skeletal mass and somatotype-related anthropometric and flexibility-related measurements, only relaxed upper-arm girth, ectomorphy, left Active-straight-leg-raise-test and the left Modified Thomas Quadriceps Test values showed significant differences (p < 0.05) when the two groups of players were compared. Although the experimental group demonstrated significantly better average scores in the majority of the last-mentioned components, this group experienced a significantly higher reduction in relaxed upper-arm girth due to the conditioning program than the control group. The main effect ANOVA results of the acute study showed that no significant differences were obtained for any of the measured components between an acute resisted and normal jump training session. To conclude, the study revealed that a 4-week combined rugby-conditioning and resisted jump training program (experimental group) did not benefit university-level rugby players significantly more with regard to selected physical, motor ability and anthropometric components than a combined rugby-conditioning and normal jump training program (control group). Furthermore, despite the fact that the acute resisted and normal jump training exercises met all the requirements to produce post-activation potentiation, the study results showed that these exercise sessions did not lead to any significant acute changes in the physical and motor ability components of university-level rugby players. / MA (Sport Science), North-West University, Potchefstroom Campus, 2014
105

Šešių savaičių trukmės koncentruotų jėgos greitumo krūvių įtaka karate sportininkų staigiosios jėgos ir smūgio ranka rodikliams / Concentrated force quickness loads on the karate athletes explosive force and punch indexes on six weeks

Ronaitis, Edvinas 18 June 2014 (has links)
Aktualumas. Karate yra viena iš populiarių dvikovinių sporto šakų Lietuvoje. Karate kovotojui išskirtinai svarbios yra tokios fizinės ypatybės kaip jėga, galingumas, lankstumas ir pusiausvyra (Probst, Fletcher, Seeling, 2007). Manoma, kad didelę įtaką smūgio ranka efektyvumui turi nugaros ir pilvo preso raumenų funkcinis pajėgumas, tačiau tai nėra patvirtinta moksliniais tyrimais. Yra žinoma, kad pliometrinės treniruotės gali ženkliai padidinti smūgio jėgą, galingumą ir nesportuojantiems asmenimis (Drinkwater et al., 2007), ir suaugusiems sportininkams, tačiau nėra žinoma, ar po šešių savaičių nugaros ir pilvo raumenų stiprinimo programos padidės sportininkų smūgių jėga. Keliama hipotezė, kad nugaros, pilvo preso raumenų staigiosios jėgos padidėjimas turės reikšmingos įtakos karate sportininko smūgio ranka efektyvumui. Objektas – raumenų funkcinių grupių pajėgumo sąsajos. Tikslas – nustatyti pilvo preso ir nugaros raumenų pajėgumo įtaką dvikoves sporto šakas kultivuojančių asmenų smūgio ranka efektyvumui. Uždaviniai: 1. Nustatyti karate sporte taikomų kontrolinių pratimų staigiosios jėgos vertinimui atkartotinumą. 2. Nustatyti šešių savaičių trukmės koncentruotų jėgos greitumo krūvių įtaką karate sportininkų raumenų staigiosios jėgos rodikliams. 3. Nustatyti šešių savaičių trukmės koncentruotų jėgos greitumo krūvių įtaką karate sportininkų smūgio ranka efektyvumui. Darbe buvo taikyti šie metodai: literatūros šaltinių analizė; dinamometrija (smūgio jėgos nustatymas „Kiktest-1... [toliau žr. visą tekstą] / Karate is one of the most popular sports in Lithuania. It is exceptionally important for karate fighter such physical abilities as strength, power, flexibility, and balance (Probst, Fletcher, Seeling, 2007). It is believed that a great influence on the efficiency of the hand to strike back and abdominal muscle functional capacity, but it is not confirmed by scientific research. It is known that pliometrinės workout can significantly increase the impact strength, power and nonathletes parties (Drinkwater et al., 2007), and adult athletes, but it is not known whether the six weeks of back and abdominal muscle strengthening program for athletes to increase the force of impact. Hypothesis of this study was that the increase of spinal and abdominal muscle explosive strength will have a significant impact on the effectiveness of karate sportsmen strike hand . Object –interface of muscle function abilities. Purpose – to determine the influence of abdominal and spinal muscle‘s strength on hand shock performance in duel sports. Goals: 1. Identify the accuracy of testing exercises aplied in karate sport for control of explosive strength. 2. To determine the effectiveness of six weeks of concentrated power speed workloads influence karate athletes muscular explosive strength indicators. 3. Set of six weeks of concentrated power for speed workloads influence karate athletes strike arm efficiency. Methods: review of literature sources; dynamometry (strike force of „Kiktest-100“... [to full text]
106

Etude des mécanismes de dispersion par choc et des régimes de combustion de nuages de particules d'aluminium. / Study of explosive dispersal of solid particles and detonability of two-phase oxygen-aluminium particles mixtures

Sturtzer, Camille-Andréa 18 September 2014 (has links)
Pour une meilleure compréhension des mécanismes d’explosions de nuages réactifs hétérogènes, la dispersion de particules solides par choc ainsi que la détonabilité des mélanges diphasiques aluminium-oxygène ont été étudiés expérimentalement et numériquement.La dispersion des particules solides est réalisée par l’explosion en champ libre de charges sphériques composées d’un explosif solide central entouré par une couche de particules solides inertes. Les données expérimentales sont obtenues à l’aide de capteurs de pression, d’un piège à particules et d’une caméra rapide.La compaction puis la décompaction de la couche est suivie de la formation d’agglomérats, tandis que certaines particules sont brisées par le choc. Le choc frontal est retardé et l’effet de souffle nettement réduit. Les particules sont réparties dans le nuage en fonction de leur taille. Les simulations numériques 1D sont en accord raisonnable avec les résultats expérimentaux.La détonabilité de mélanges diphasiques oxygène-particules d’aluminium en suspension a été étudiée en initiant une détonation divergente non confinée, dont on enregistre l’évolution temporelle de la pression et la structure cellulaire. Lors d’un amorçage avec 200-250g d’explosif solide (C4), la détonation se forme à une distance  1,6m. Les caractéristiques maximales sont observées à une distance de 2,3m (limite du nuage expérimental) et sont en accord avec les caractéristiques théoriques CJ. La structure cellulaire a été mise en évidence pour la première fois dans ce type de mélange ; sa taille est 10-15cm. Les simulations numériques 2D cylindriques, effectuées avec le code EFAE, donnent une taille de cellule légèrement supérieure. / Explosive dispersal of solid particles and detonability of two-phase oxygen-aluminum particles mixtures have been investigated experimentally and numerically in order to get a better understanding of the mechanisms governing the explosion of reactive heterogeneous mixtures.Solid particles were dispersed by the free-field explosion of spherical charges made of a central booster of solid explosive surrounded by a loose-packed density shell of inert particles. Pressure gauges, a particles trap and a high frame rate camera were used to gather experimental data. Compaction and decompaction of the layer are followed by the formation of particle agglomerates, whereas some other particles are burst by the shock. The leading shock is delayed and the blast effect is strongly damped. Particles are spread into the cloud accordingly to their size. 1D numerical simulations agree in general with the experimental results.The detonability of two-phase oxygen-aluminum particles mixtures was studied by initiating an unconfined diverging detonation, during which the temporal pressure evolution and the cellular structure were recorded. The detonation wave formed at 1,6m. With an ignition charge of 200-250g C4, the maximal values of pressure and velocity recorded at a radial distance of 2,3m (corresponding to the border of the cloud) are consistent with the CJ values. The cellular structure was observed for the first time in this kind of mixture with a cell size of 10-15cm. The cell size calculated with a 2D cylindrical simulation (performed with the EFAE code) is slightly larger.
107

Efeitos de uma pré temporada em parâmetros anaeróbios e comparação de parâmetros aeróbios e anaeróbios de futebolistas de diferentes categorias /

Campos, Eduardo Zapaterra. January 2010 (has links)
Orientador: Pedro Balikian Júnior / Banca: Marcelo Papoti / Banca: Claudio Alexandre Gobatto / Resumo: O presente estudo investigou desempenho em saltos verticais e em teste de wingate (TW) de jogadores de futebol profissional no início da temporada e após 7 semanas de treinamento. Treze jogadores profissionais de futebol participantes da segunda divisão do campeonato paulista, foram avaliados no início da pré temporada (T1) e após 07 semanas (T2) de treinamento. Os jogadores realizaram testes de saltos verticais: squat jump (SJ) e countermovement jump (CMJ), índice de força reativa (IFR=CMJ-SJ) e TW, potência pico (PP), média (PM) e índice de fadiga (IF). Após o TW, foram coletados 25 μl de sangue do lóbulo da orelha no 7º, 9º e 11º minuto para determinação da concentração pico de lactato ([Lac]). A comparação entre as variáveis foi realizada pelo teste t de Student para amostras dependentes, sendo adotado o nível de significância de 5% (p<0,05). Foram observadas melhoras significantes no SJ (T1= 32,76 ± 3,88; T2= 38,03 ± 5,49), CMJ (T1= 37,76 ± 4,88; T2= 40,86 ± 5,62), PP (T1= 10,97 ± 0,90; T2= 12,32 ± 1,12) e PM (T1= 8,34 ± 0,82; T2= 9,78 ± 0,99), respectivamente. No entanto, alterações no IF e [Lac] não foram ... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: The present study investigated vertical jump and wingate test (TW) performance of soccer players in the beginning of season and after 7 weeks of training. Thirteen professional second division soccer players from the Paulista championship were tested on the beginning of the pre-season (T1) and after seven weeks (T2) of training. The players were submitted to vertical jump tests: squat jump (SJ) and countermovement jump (CMJ), reactive force index (IFR=CMJ-SJ) and TW, peak power (PP), mean power (PM) and fatigue index (IF). After TW, 25 μl blood was collected from the earlobe on the 7º, 9º and 11º minute to determine the highest blood lactate concentration ([Lac]). Comparison between variables was performed by Students' t test for dependent sample, with a significance level of 5%. Were found significant improvements on SJ (T1= 32,76 ± 3,88; T2= 38,03 ± 5,49), CMJ (T1= 37,76 ± 4,88; T2= 40,86 ± 5,62), PP (T1= 10,97 ± 0,90; T2= 12,32 ± 1,12) e PM (T1= 8,34 ± 0,82; T2= 9,78 ± 0,99), respectively. Nevertheless, IF and [Lac] changes were ... (Complete abstract click electronic access below) / Mestre
108

Local and global effects on navigation in small-world networks and explosive percolation

Reis, Saulo-Davi Soares e January 2012 (has links)
REIS, Saulo Davi Soares e. Local and global effects on navigation in small-world networks and explosive percolation. 2012. 86 f. Tese (Doutorado em Física) - Programa de Pós-Graduação em Física, Departamento de Física, Centro de Ciências, Universidade Federal do Ceará, Fortaleza, 2012. / Submitted by Edvander Pires (edvanderpires@gmail.com) on 2015-06-16T20:35:22Z No. of bitstreams: 1 2012_tese_sdsreis.pdf: 3097854 bytes, checksum: 3798beb23c0415893113a8072fc802fe (MD5) / Approved for entry into archive by Edvander Pires(edvanderpires@gmail.com) on 2015-06-18T18:21:41Z (GMT) No. of bitstreams: 1 2012_tese_sdsreis.pdf: 3097854 bytes, checksum: 3798beb23c0415893113a8072fc802fe (MD5) / Made available in DSpace on 2015-06-18T18:21:41Z (GMT). No. of bitstreams: 1 2012_tese_sdsreis.pdf: 3097854 bytes, checksum: 3798beb23c0415893113a8072fc802fe (MD5) Previous issue date: 2012 / A significant number of real networks have well-defined local and nonlocal features. We investigate the influence of these features in the navigation through small-world networks and in explosive percolation. First, we investigate the navigation problem in lattices with long-range connections and subject to a cost constraint. Our network is built from a regular d-dimensional lattice to be improved by adding long-range connections (shortcuts) with probability $P_{ij} sim r_{ij}^{-alpha}, where $r_{ij}$ is the Manhattan distance between nodes $i$ and $j$, and a is $alpha$ variable exponent. We find optimal transport in the system for $alpha = d+1$. Remarkably, this condition remains optimal, regardless of the strategy used for navigation being based on local or global knowledge of the network structure. Second, we present a cluster growth process that provides a clear connection between equilibrium statistical mechanics and the nonlocal explosive percolation process. We show that the following two ingredients are sufficient for obtaining an abrupt transition in the fraction of the system occupied by the largest cluster: (i) the size of all growing clusters should be kept approximately the same, and (ii) the inclusion of merging bonds (i.e., bonds connecting nodes in different clusters) should dominate with respect to the redundant bonds (i.e., bonds connecting nodes in the same cluster). Finally, we introduce a generalization of the product rule for explosive percolation that reveals the effect of nonlocality on the critical behavior of the percolation process. Precisely, pairs of unoccupied bonds are chosen according to a probability that decays as a power law of their Manhattan distance, and only that bond connecting clusters whose product of their sizes is the smallest becomes occupied. Our results for d-dimensional lattices at criticality shows that the power law exponent of the product rule has a significant influence on the finite-size scaling exponents for the spanning cluster, the conducting backbone, and the cutting bonds of the system. For all these types of clusters, we observe a clear transition from ordinary to (nonlocal) explosive percolation. / Um número significativo de redes reais possui características locais ou não-locais bem definidas. Nós estudamos como estas características podem influenciar processos de navegação e processos percolativos que venham a ocorrer nas mesmas. Primeiramente, estudamos o problema de navegação em redes regulares com ligações de longo alcance e sujeitas a um vínculo de custo. Neste caso, a rede é construída a partir de uma rede regular de dimensão d a ser melhorada por meio da adição de ligações de longo alcance (atalhos) com uma probabilidade $P_{ij} sim r_{ji}^{-alpha}$ , onde $r_{ij}$ é a distância de Manhattan entre os sítios $i$ e $j$. Mostramos que a condição de navegação ótima, $alpha = d+1$, permanece ótima, independente da estratégia de navegação utilizada, seja ela baseada em um conhecimento local ou global da estrutura da rede. Em seguida, apresentamos um processo de crescimento de agregados que fornece uma clara conexão entre a Mecânica Estatística no equilíbrio e o processo percolativo não-local conhecido como Percolação Explosiva. Mostramos que dois ingredientes são suficientes para obter uma transição abrupta na fração do sistema ocupada pelo maior agregado: (i) os tamanhos de todos os agregados devem ser mantidos aproximadamente iguais durante o processo percolativo e (ii) a inclusão de ligações de fusão (i.e., ligações que conectam agregados diferentes) deve dominar o processo em detrimento de ligações redundantes (i.e., ligações que conectam sítios em um mesmo agregado). Por último, introduzimos um modelo que generaliza a regra do produto para Percolação Explosiva que revela os efeitos da não-localidade no comportamento crítico do processo de percolação. Mais precisamente, pares de ligações não ocupadas são escolhidos de acordo com uma probabilidade que decai em lei de potência com sua distância de Manhattan, e apenas a ligação que conecta agregados para os quais o produto de seus tamanho é o menor, é ocupada. Nossos resultados para redes regulares finitas em diversas dimensões sugerem que, na criticalidade, o expoente da lei de potência tem uma influência significativa nos expoentes de escala, onde observa-se uma transição nos expoentes da percolação tradicional para os expoentes da percolação explosiva (não-local) em determinados casos.
109

Pós-humanismo na máquina anímica : visões explosivas do humano na animação japonesa / Posthumanism in the animetic machine : explosive visions of the human in japanese animation

Longo, Angela January 2017 (has links)
Nesta pesquisa procuramos investigar a animação japonesa como uma máquina para compreendermos como a copresença evolucionária de outros seres — técnicos e animais — potencializa outras compreensões sobre o humano. Com esse posicionamento, procuramos demonstrar como o humanismo, além de se constituir como um modelo filosófico, científico e civilizacional, também propôs uma visão estética sobre o humano. Para realizar uma abertura dessa herança, procuramos traçar uma genealogia do humano e dos objetos técnicos em correlação. A compreensão do anime como uma máquina parte da teoria de Thomas Lamarre, em conjunto com as teorizações de Gilbert Simondon, Félix Guattari e Gilles Deleuze. O viés da análise tem o pressuposto de que, se a construção da animação se dá por layers, ou camadas que misturam diferentes técnicas e perspectivas visuais, poderíamos dizer que elas revelam a suis generis de pensamento em ação na animação. O humano também é pensado como uma construção, assim a relação de explosão do humanismo e da implosão do antropocentrismo visa desterritorializar o humano nos seus componentes teóricos e poéticos. O surgimento da teoria pós-humanista foi inicialmente pavimentado graças à desterritorialização posta sobre o humano no pós-estruturalismo. Para aprofundar esse argumento partimos da herança em Nietzsche e Derrida até autores pós-humanistas como Donna Haraway, Cary Wolfe, Rosi Braidotti e Stefan Herbrechter. Após estabelecermos um panorama da animação de ficção científica no Japão, iremos nos debruçar na análise das animações Rebuild of Evangelion 3.0: You Can (Not) Redo (2012) dirigida por Hideaki Anno e Ghost in the Shell: Innocence (2004) dirigida por Mamoru Oshii. De uma maneira geral a pesquisa foi dividida em três seções: pós-humanismo e techno-poética, máquina anímica e visões explosivas do humano. Na primeira, procuramos evidenciar uma genealogia do humano com atenção à sua coevolução e historicidade com os objetos técnicos, estabelecendo relações entre regimes de pensamento e estese. A segunda seção diz respeito às configurações da máquina anímica, suas relações com a tradição estética japonesa e com elementos da estética humanista, tal qual a perspectiva cartesiana. Procuramos demonstrar a existência de outros modelos visuais como uma abertura da heterogênese da máquina. A terceira seção é na qual iremos analisar as visões explosivas do humano na animação japonesa através das categorias analíticas propostas por Lamarre. Nossa hipótese é demonstrar como a máquina anímica poderia permitir uma heterogênese pós-humana através da dobra comunicacional do intervalo anímico. / In this research, we seek to investigate Japanese animation as a machine to understand how the evolutionary coo presence of other beings — technical and animal — enhances new understandings about the human. With this position, we try to demonstrate how humanism, besides constituting itself as a philosophical, scientific and civilizational model, also proposed an aesthetic vision about the human. To open this inheritance, we traced the genealogy of human and technical objects in correlation. The understanding of anime as a machine starts with the theory of Thomas Lamarre, together with the theorizations of Gilbert Simondon, Felix Guattari and Gilles Deleuze. Our analysis approach has the assumption that if the construction of the animation is made of layers that mix different techniques and visual perspectives, we could say that they reveal the suis generis of thought in action in the animation. We affirm that the human is a construction, so the relation of humanism explosion and the implosion of anthropocentrism aims to deterritorialize the human in its theoretical and techno-poetic components. The emergence of post-humanist theory has a debt to the deterritorialization put on the human in the post-structuralist theory. To deepen this argument we start from the inheritance in Nietzsche and Derrida to posthumanist authors like Donna Haraway, Cary Wolfe, Rosi Braidotti and Stefan Herbrechter. After we stablished an overview of science fiction animation in Japan, we will focus our analyses with the animations Rebuild of Evangelion 3.0: You Can (Not) Redo (2012) directed by Hideaki Anno and Ghost in the Shell: Innocence (2004) directed by Mamoru Oshii. In general, the research was divided into three sections: posthumanism and techno-poetics, the animetic machine and explosive visions of the human. In the first, we try to show a genealogy of the human with attention to its coevolution and historicity with the technical objects, establishing relations between regimes of thought and aesthetic. The second section concerns the configurations of the animetic machine, its relations with the Japanese aesthetic tradition, and elements of humanistic aesthetics, such as the Cartesian perspective. We try to demonstrate the existence of other visual models as an opening of the heterogenesis of the animetic machine. The third section is where we will analyze the explosive visions of the human in Japanese animation through the analytical categories proposed by Lamarre. Our hypothesis is to demonstrate how the animetic machine could allow a post-human heterogenesis through the communication fold of the animetic interval.
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Transitions in Eruption Style at Silicic Volcanoes: From Stable Domes to Pyroclastic Flows and Explosive Plumes

January 2016 (has links)
abstract: Silicic volcanoes produce many styles of activity over a range of timescales. Eruptions vary from slow effusion of viscous lava over many years to violent explosions lasting several hours. Hazards from these eruptions can be far-reaching and persistent, and are compounded by the dense populations often surrounding active volcanoes. I apply and develop satellite and ground-based remote sensing techniques to document eruptions at Merapi and Sinabung Volcanoes in Indonesia. I use numerical models of volcanic activity in combination with my observational data to describe the processes driving different eruption styles, including lava dome growth and collapse, lava flow emplacement, and transitions between effusive and explosive activity. Both effusive and explosive eruptions have occurred recently at Merapi volcano. I use satellite thermal images to identify variations during the 2006 effusive eruption and a numerical model of magma ascent to explain the mechanisms that controlled those variations. I show that a nearby tectonic earthquake may have triggered the peak phase of the eruption by increasing the overpressure and bubble content of the magma and that the frequency of pyroclastic flows is correlated with eruption rate. In 2010, Merapi erupted explosively but also shifted between rapid dome-building and explosive phases. I explain these variations by the heterogeneous addition of CO2 to the melt from bedrock under conditions favorable to transitions between effusive and explosive styles. At Sinabung, I use photogrammetry and satellite images to describe the emplacement of a viscous lava flow. I calculate the flow volume (0.1 km3) and average effusion rate (4.4 m3 s-1) and identify active regions of collapse and advance. Advance rate was controlled by the effusion rate and the flow’s yield strength. Pyroclastic flow activity was initially correlated to the decreasing flow advance rate, but was later affected by the underlying topography as the flow inflated and collapsed near the vent, leading to renewed pyroclastic flow activity. This work describes previously poorly understood mechanisms of silicic lava emplacement, including multiple causes of pyroclastic flows, and improves the understanding, monitoring capability, and hazard assessment of silicic volcanic eruptions. / Dissertation/Thesis / Doctoral Dissertation Geological Sciences 2016

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