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Arllentar, Vitko Jacobo Nataniel, Quichca Franklin Alex Sulca, Cumpa Carlos Elías Fernández, and Maldonado Gian Carlos Sanchez. "Thunder." Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2020. http://hdl.handle.net/10757/653205.
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El presente trabajo de investigación fue realizado por alumnos de la Universidad Peruana de Ciencias Aplicadas con habilidades en el desarrollo de nuevos emprendimientos. Como parte de esta investigación se identificó en el mercado actual la necesidad de brindar un servicio de recarga de baterías para vehículos eléctricos menores, el cual tiene un público que se encuentra en incremento. Para satisfacer esta necesidad se desarrolló Thunder.
El objetivo de Thunder es brindar un servicio rápido y eficiente para toda aquella persona que posea un vehículo eléctrico con el fin de trasladarse a su centro de labores o para fines sociales, haciendo que estos puedan contar con la suficiente cantidad de carga para desplazarse con mayor autonomía y, a su vez, genere rentabilidad como nuevo modelo de negocio.
Nuestra propuesta de valor es brindar un servicio donde la carga de energía y el tiempo de carga son las principales necesidades para satisfacer en los usuarios. La fidelización de nuestros clientes será sostenida por una interacción activa con los usuarios, logrando a través del marketing WOM (boca a boca) la conversión de los clientes potenciales.
El reemplazar la carga de estos vehículos en casa no solo genera practicidad al cliente, sino mayor disponibilidad de uso; la idea es que tengan la inyección de energía que necesitan para movilizarse sin preocupaciones.This research work is carried out by students of the Peruvian University of Applied Sciences with skills in the development of new ventures, where we identify the need in today's market for the option of providing a battery recharging service with a public in increase that is transferred by minor electric vehicles. Thunder's objective is to provide a fast and efficient service for anyone who owns an electric vehicle to move to their work center or for social purposes, making them able to have enough cargo to move with them. greater autonomy and, in turn, generate profitability as a new business model. Our value proposition is to provide a service where energy charging and charging time are the main needs to satisfy users. The loyalty of our clients will be sustained by an active interaction with the users, achieving through conversion WOM (word of mouth) the conversion of potential clients. Replacing the load of these vehicles at home not only generates practicality for the customer but also greater availability of use; the idea is that they have the injection of energy they need to move without worries.
Trabajo de investigación
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Hultberg, Niklas. "Operation Rolling Thunder." Thesis, Försvarshögskolan, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:fhs:diva-4096.
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This paper provides an explanation of the concepts John A. Warden III describes regarding the use of air power and if this theory can be found, within the confines of an unconventional war. The U.S. ability to air power is overwhelming, however the right kind of warfare can force this great power to abandon their military and political objectives by exhausting its resources over time as it becomes increasingly costly, both economically, politically and morally, to wage war. The research deals with operation Rolling Thunder and John A. Warden IIIs theory in relation to this massive bombing campaign. Firstly, you will find an analysis of John. A. Warden III's works. Five concepts can be found: Airspace Control, center of gravity, air interdiction, the enemy as a system and parallel attack. Secondly, a content analysis of relevant literature in the context of a case study on Operation Rolling Thunder. Thirdly a comparative analysis between the two results with a subsequent discussion relating the main problem and an effort is made to determine the outcome of the investigation and if the purpose of this paper has been met. Within the implementation phases of Operation Rolling Thunder, it is possible to distinguish som of Wardens key concepts regarding air power utilization. Even though the four phases illustrate a continuous change in strategy, Wardens theory The Enemy as a system was never implemented.Denna uppsats ger en förklaring av John A. Warden IIIs teori om nyttjande av luftmakt och de begrepp som utgör grunden för denna. Frågan om grundbegreppen går att återfinna inom ramarna för ett otraditionellt krig tas upp. USAs förmåga till luftmakt är stor, men med rätt sorts krigföring kan även denna makt tvingas överge sina militära och politiska mål genom utmattning över en längre tidsperiod eftersom det blir allt dyrare, både ekonomiskt, politiskt och moraliskt, att föra krig. Här avhandlas operationen Rolling Thunder och John A. Warden IIIs teoris anknytning till denna enorma bombkampanj. Inledningsvis återfinns en innehållsanalys av John. A. Warden IIIs litteratur, vilket utmynnar i fem begrepp: Luftrumskontroll, tyngdpunkter, flyganfall på djupet, fienden som ett system och parallell attack. Efter det följer en innehållsanalys av relevant litteratur inom ramen för en fallstudie om Rolling Thunder och slutligen påträffas en komparativ analys mellan de två resultaten och en efterföljande diskussion knyter an till problemformuleringen och försöker utröna resultatet av undersökningen och om syftet med uppsatsen uppfyllts. I genomförandefaserna av Operation Rolling Thunder är det möjligt att urskilja vissa av Wardens centrala begrepp och tankar om luftmaktens nyttjande, men hans teori som helhet går inte att återfinna i genomförandet av Rolling Thunder. Trots att de fyra faserna åskådliggör en upprepad förändring i strategi, användes aldrig Wardens teori om fienden som ett system.
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Moback, Filip. "Misslyckandet i Operation Rolling Thunder." Thesis, Försvarshögskolan, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:fhs:diva-9170.
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This paper aspires to answer the question of what mistakes the United States Air Force committed during operation rolling thunder in the Vietnam war. The purpose of this is to contribute to a deeper understanding of the operation and moreover to contextualise the mistakes that were made and that according to modern papers of military failures are continuing to be made. There have been studies that have sought to explain the operations failures but by using the framework of the prevalent theorists John A. Warden and Robert A. Papes theories i hope to shed new light on this topic. By using John A. Warden and Robert A. Papes theories concerning the use and implementation of airpower important factors missing from the planning or execution of this operation can be identified. One overarching problem with the operation is the continued meddling by politicians and civilian cabinet members in the planning and execution of the operation. A fear of Chinese involvement also lead to incredibly strict rules of engagements that forbade american pilots from even returning fire in some instances. A lack of commitment and constant ceasefires hindered the operation from succeeding in putting enough pressure on the north vietnamese and allowed them to rebuild what was destroyed. One last key factor was the lack of coordination between the aerial and ground forces, this deminitied the effectiveness of both.
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Mahmoudiandehkordi, Soroush. "Energy Harvesting With A THUNDER Piezoelectric." Thesis, Southern Illinois University at Edwardsville, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10243311.
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Piezoelectric materials have a unique characterization which can absorb energy from the environment and convert it to electrical energy. In this conducted research energy harvesting of the THin layer UNimorph DrivER (THUNDER) were investigated. THUNDER is a curved PZT which bring considerable benefits in compare of flat PZT such as better vibration absorption capacity and higher energy recovery efficiency. Also one of the most important characteristics of THUNDER is its low resonance frequency. Because the maximum power a harvester can achieve is at its resonance frequency. So it has application in low resonance frequency situations. In this work, general constitutive law for piezoelectric materials is reduced because it is assumed THUNDER is thin and modeled as a Euler-Bernoulli beam. To obtain mechanical-electrical coupling equations, Hamilton principle is used. Hamilton principle is using kinetic and potential energy and work due to the external force as its input. As a result, modals and natural frequency of THUNDER are obtained. Then based on boundary condition, natural frequency can be achieved. By using Rayleigh-Ritz approach and in-extensional assumption and assuming excitation is sinusoidal, discretize mechanical-electrical coupling equations can be written. For the experiment part, two modes energy harvesting circuit is used, the first one is full bridge rectifier in low-level excitation and steps down converter in high-level excitation. Also, resistor and battery are used as an external load. Because rectified voltage is equal battery voltage, so the model needs to be adjusted by putting a step-down converter in the circuit to adjust Voltage and get the maximum power from the model. In the case of the resistor as an external load, the maximum power will achieve near resonance frequency and also by increasing the amplitude of resistors, more power can be achieved by the circuit. Also, step down converter is used in two modes, continuous conduction mode(CCM) and Discontinuous conduction mode(DCM). Power harvesting in this two mode also compared.
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Taylor, Brian. "BLOOD & THUNDER CLASSICS, VOL. 2." VCU Scholars Compass, 2009. http://scholarscompass.vcu.edu/etd/1835.
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A MAGAZINE – A game of Chutes and Ladders – a network of pools connected by streams, rivulets, creeks and rivers. Concerns: aluminum, sculpture, film, an endless image or an image-object, cork, shoulders as the center of movement, archery, wicker, nystagmus, darkness or the penumbral near-darkness, constant movement, beer, tone, musical forms, bells, gongs, The Titanic, purple, black and white, indeterminacy, Ghostface, yodeling, John Smith, John Adams, David Hammons, Beyoncé, Honda CR-V’s, Har-khebi, Ahnighito, Hermann Doomer, Prince, Yvonne Rainer, perception, double rainbows, composers from Transylvania, Los Angeles, and chandeliers. “Everything is everything.” and “A woman is the first teacher.”
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Herbert, David. "Last Stand at Big Thunder Mountain." VCU Scholars Compass, 2006. http://scholarscompass.vcu.edu/etd/1049.
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I seek to pose questions about what people overlook or don't consider when viewing art in order to interpret what they see. When working on a project, I purposely retain the effect of my hand. The false crudeness is enhanced by my use of seemingly impoverished materials. This is akin to seeing the fishing wire holding up the miniature spaceship as it flies through the sky. This document was created with Microsoft Word XP.
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CARNAVALE, THIAGO DE SOUZA. "SOIL-THUNDER INTERACTION: A FIELD MONITORING ANALYSIS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2018. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=36899@1.
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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIROCONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO
FUNDAÇÃO DE APOIO À PESQUISA DO ESTADO DO RIO DE JANEIRO
BOLSA NOTA 10
A presente tese tem como objetivo avaliar a interação trovão-solo no que toca a ocorrência de trovões e suas características microssísmicas, apontando a influência de vibrações induzidas para a redução do fator de segurança em uma análise (pseudo-estática) de estabilidade de encostas. Considerando a abordagem inédita, foi efetuado um levantamento teórico com o intuito de apresentar as principais características dos relâmpagos e suas correlações com o solo. Como material, foi utilizado um solo coluvionar, composto principalmente de quartzo, feldspato e biotita. O referido foi caracterizado através de métodos padrão (complementados com o uso da microtomografia 3D), e a retenção e disponibilidade de água foram reveladas. Foi efetuado um monitoramento de campo de longo prazo para avaliar a correlação entre os dados climáticos (incluindo incidência de raios) e o potencial hídrico dos solos. Por fim, foi utilizado uma estação para monitoramento sismográfico para captar as vibrações induzidas por trovões nos solos. Os resultados mostram 39 ocorrências de raios próximos ao local de monitoramento de campo. O monitoramento sísmico mostrou que os trovões causam sinais microssísmicos compostos por acelerações de pico do solo até 0,02 m/s ao quadrado. Em conclusão, para fins geotécnicos, o trovão é um assunto que pode ser avaliado à luz de um carregamento sísmico.
The present thesis aims to evaluate thunder-soil interaction verifying the influence of its induced vibrations to the reduction of the factor of safety in a pseudo-static slope stability analysis. In order to carry out this research, considering the unpublished approach, a theoretical survey was made in order to present the main characteristics of the lightning and its correlations with the soil. As a material, a colluvial soil, mainly composed of quartz, feldspar and biotite was characterized by standard methods (supplemented with the use of 3D microtomography) in order to reveal its mineral composition, structural arrangement and water retention. After field and laboratory calibration of the water potential and volumetric moisture sensors, a long-term field monitoring was performed to evaluate the correlation between climatic data (including lightning incidence) and soil water potential. Finally, a seismographic monitoring station was used to capture the vibrations induced by thunder in the soils. The results depicted 39 lightning events near the field monitoring site. However, no rapid variation of water potential was revealed during thunderstorm days. Seismic monitoring showed that thunder caused micro-seismic signals composed of ground peak accelerations up to 0.02 m/s squared. In conclusion, for geotechnical purposes, thunder is a subject that can be evaluated in the light of pseudostatic loads. However, further researches are required to verify the vibrations of larger magnitudes, induced by rays that occur at smaller distances of the seismic monitoring point.
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Breen, India R. "Miniature thunder: Inscribing the self in ekphrastic poetry." Thesis, Queensland University of Technology, 2017. https://eprints.qut.edu.au/106744/1/India_Breen_Thesis.pdf.
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This practice-led research project considers how the figure of poetic self is inscribed in the ekphrastic poem and looks at how ekphrasis can intersect with confessional poetics to form a hybrid mode. This mode of hybridity guides my own creative practice and creates an expansion of the term ekphrasis, as ekphrasis illuminates that it is never a static interaction, but a mode that entails a verbal representation of the artwork as well as aspects of the confessional self.
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Donovan, Ian. "Advances in recycle mill supervisory control at Avenor Thunder Bay." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0024/MQ52051.pdf.
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Scott, John Thomas. "James McGready: Son of Thunder, Father of the Great Revival." W&M ScholarWorks, 1991. https://scholarworks.wm.edu/etd/1539623808.
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This dissertation is a biography of James McGready (c.1760-1817), a Presbyterian revivalist minister who lived and worked primarily in Pennsylvania, North Carolina, Kentucky, and Indiana. He is best known as the Father of the Great Revival, an evangelical revival that spread throughout the southeastern United States between 1800 and 1805, and the creator of the camp meeting, which soon became an institutional part of American revivalism. Historians have generally described McGready as an innovator in matters of doctrine and revivalist methodology. This study argues that McGready is better understood as a traditionalist. This interpretation follows several recent works that have outlined a Scottish and Scotch-Irish Presbyterian revivalist tradition dating from the 1620s.;The study traces McGready's educational background, outlines a variety of his theological positions, describes his intense homiletical style, and details his professional career. Research revealed that McGready was educated in several small Presbyterian-run schools that had direct links to the Presbyterian revivalism mentioned above. In doctrine, an examination of such varied topics as the process of conversion, limited atonement and predestination, and millennialism, showed McGready to be a firm Presbyterian Calvinist at every turn. In his homiletical style McGready followed a one hundred and fifty year old pattern of preaching known as the plain style and avoided the unstructured, extemporaneous preaching increasingly favored by revivalists in the nineteenth century. During his professional career, and especially during the Cumberland controversy of 1805-1809, McGready sided with the mainline church and eschewed those with schismatic inclinations.;The reinterpretation of McGready as a traditionalist casts doubt on much of the historiography of American revivalism. Historians have generally argued that revivalism arose in America and especially on the frontier. Understanding McGready, one of the foremost revivalists of the period, as a traditionalist tends to undermine that position. Additionally, this work re-emphasizes the transference of European forms to the New World, even past the American Revolution. Finally, McGready's professional struggles point up the remarkable fluidity in American religion during the early national period.
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Dunk, Thomas W. (Thomas William). ""It's a workin' man's town" : class and culture in Northwestern Ontario." Thesis, McGill University, 1988. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=74063.
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Mouhli, Makram. "ANALYSIS AND SHAPE MODELING OF THIN PIEZOELECTRIC ACTUATORS." VCU Scholars Compass, 2005. http://scholarscompass.vcu.edu/etd/1552.
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The field of smart materials is an increasingly growing area of research. In aerodynamics applications especially, transducers have to fulfill a series of requirements such as light weight, size, energy consumption, robustness and durability. Piezoelectric transducers, devices which transform an electrical signal into motion, fulfill many of these requirements. Specifically, piezoelectric composites are of interest due to their added toughness and ease of integration into a structure. Resulting composites have a characteristic initial curvature with accompanying residual stresses that are responsible for enhanced performance, relative to flat actuators, when the active material is energized. A number of transducer designs based on composites have been developed. Two of these piezoelectric composites called Thunder® and Lipca are analyzed. Thunder is a composite of steel, polyimide adhesive, PZT, polyimide adhesive, and aluminum; and Lipca is a composite of fiberglass epoxy, carbon/epoxy, PZT, and fiberglass epoxy.Room temperature shapes of circular and rectangular Thunder® and Lipca actuators are predicted by using the Rayleigh-Ritz model. This technique is based on the assumption that the stable geometric configuration developed in the actuator after manufacturing, is the configuration that minimizes the total potential energy. This energy is a function of the displacement field which can be approximated by two functions, a four term model, and a twenty-three term model. The coefficients in the models are determined by minimizing the total potential energy of the actuator. The actuator deformations are assumed to obey the Kirchhoff hypothesis and the actuator layers are assumed to be in the state of plane stress.The four coefficient model produces results not comparable to three-dimensional surface topology maps. The twenty-three coefficient model however, is shown to have generally good agreement with the data for all studied actuators. To quantify the difference, at the cross section of each actuator, a profile is fitted by using a quadratic equation obtaining regression coefficients above 99%. For all actuators, the error between experimental and the calculated centerline data is less than 6%. For the 6R model however, the error is approximately 25%. One of the possible reasons for the error may be the tolerance of the thickness of the PZT layer. By changing the PZT thickness ±6% of the nominal value, over predicts the experimental dome height by 20%. Another possible reason for the discrepancy is the thickness of the actuator, thicker than all actuators used in this study, which might contradict the validity of the thin actuator assumption. Furthermore, by calculating the side-length-to-thickness ratio, 115 in this case, as stated by Aimmanee & Hyer (2004), may cause instability, and could result in unexpected behavior.The neutral axis position, calculated by using a force balance at equilibrium under the assumption of pure bending, for all actuators used in this study is determined and compared to the ceramic layer position. The results indicated that for all Thunder® models the neutral axis is located below the ceramic layer indicating that the PZT wafer may be in total tension. For the Lipca C2 device however, the neutral axis is found to be above the ceramic layer, indicating that the piezoelectric layer may be in total compression.Strain fields are also predicted with contradicting results when compared to the theory that the ceramic is in tension in the Thunder actuators. The contradiction on the strain calculations can be explained by the manner the strain field is derived: by differentiating and squaring the high-order polynomials of the approximated displacement component losing accuracy when it comes to predicting normal and shear strains.The Rayleigh-Ritz technique can become a tool to perform parametric studies of the key elements for manufacturing to optimize specific features of the actuators.
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St-Amand, Olivier. "Modélisation semi-analytique dynamique d'un actionneur THUNDER utilisé en isolation vibratoire." Thesis, Université Laval, 2012. http://www.theses.ulaval.ca/2012/28744/28744.pdf.
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Hasan, Md Nahid. "Design Study of a Piezoelectric Curved THUNDER via Finite Element Modeling." Thesis, Southern Illinois University at Edwardsville, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10837336.
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A piezoelectric-coupled finite element model for a THUNDER harvester (THin layer UNimorph DrivER) is developed and studied in this work. THUNDER is a curved piezoelectric energy generator developed by NASA Langley Research Center, which has better vibration absorption and higher energy recovery efficiency at low-frequency vibration compared to a flat PZT harvester. To apprehend the piezoelectric effect of the THUNDER harvester, finite element method was used to perform the piezoelectric coupled field analysis. Piezoelectric THUNDER harvester was studied under cantilever boundary condition. In the model, the excitation forces are distribution force allied on the top of the dome line. An electric circuit element was used to create load resistance across the electrodes to obtain the generated voltage and power. The effect of the geometric parameter was investigated via the varying radius of curvature which affects the resonance frequency, voltage and power output of the THUNDER. Good agreement between finite element analysis and experimental results were also observed. In finite element analysis: Modal analysis was carried out to find the resonance frequency at which maximum performance characteristics of the THUNDER can be achieved. Then, the harmonic analysis was performed to distinguish the voltage and power output variation as the load resistance changes. The effects of the varying radius of curvature on the power efficiency of the THUNDER were summarized.
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Hanson, Phillip S. "Between flash and thunder: an investigation of the figure-ground dynamic." The Ohio State University, 2001. http://rave.ohiolink.edu/etdc/view?acc_num=osu1327598522.
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Robertson, Haileigh Elouise. "'Imitable thunder' : the role of gunpowder in seventeenth-century experimental science." Thesis, University of York, 2015. http://etheses.whiterose.ac.uk/11919/.
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The role of gunpowder as a military propellant has been widely studied. Less well understood, however, is its important role in seventeenth-century experimental science. Francis Bacon (1561-1626) called it ‘imitable thunder’, a designation indicative of its manifestation of nature’s occult powers. In the subsequent promotion of an experimental philosophy grounded on Bacon’s demands for a union of theory and practice, gunpowder appears frequently in experiments, discussions and controversies among Bacon’s followers. This thesis focuses on the transference of gunpowder from the battlefield to the laboratory. The Baconians re-valued and redefined it as an inquisitional material. To get to grips with the complex nature of this transition, the approach taken here fuses intellectual history, materials history, and the reworking of historical experiments. This integration reflects the Baconian call for a union of theorising and experiment. It also highlights how common substances could be reconfigured as scientific materials. Furthermore, this thesis demonstrates the diversity of Baconian endeavours to transfer gunpowder from the battlefield to the laboratory. There was little coherence among putative Baconians. While Bacon and Boyle saw gunpowder as a means to understand and appropriate the occult powers of matter, many fellows of the early Royal Society were more concerned to exploit gunpowder’s explosive energies for more immediate fruits. For them, harnessing the power of gunpowder symbolised the usefulness of natural inquiry and hence a valued role for the nascent Royal Society itself. Thus, locating gunpowder’s role in early modern science illustrates the programmatic, inquisitional, and symbolic roles of an everyday, but hugely powerful material. Moreover, this focus on gunpowder offers further exploration of early modern Baconian cultures of experiment, as well as valuable insights into efforts to implement Bacon’s project. Last but by no means least, gunpowder illustrates the benefits for historians of science of reworking historical processes and experiments.
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Paris, Chiara <1992>. "«Diventar femina»: storie di emigrazione matrimoniale a Thunder Bay, 1954-1966." Master's Degree Thesis, Università Ca' Foscari Venezia, 2018. http://hdl.handle.net/10579/13527.
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L’elaborato si propone di analizzare il fenomeno dell’emigrazione transoceanica nel secondo dopoguerra attraverso le storie individuali di otto donne incontrate nella città canadese di Thunder Bay. La tesi assume la forma di una collana di interviste rielaborate in forma narrativa e corredate da altre tipologie di fonti: fotografie, registri di matrimonio, documenti personali (carta d’identità, libretto di lavoro, passaporto). Una posizione centrale è assunta dal genere come categoria storiografica fondamentale per cogliere il fenomeno dell’emigrazione di tipo matrimoniale. Inoltre viene data particolare rilevanza alle esperienze lavorative e alla mediazione tra ambiti di lavoro: casalingo e extradomestico. L’affondo nel particolare delle storie di vita viene infine riportato a una serie di temi generali che descrivono il contesto socio culturale dell’Italia nel decennio a cavallo tra anni Cinquanta e Sessanta: l’abbandono delle campagne, la ricerca di un maggiore benessere materiale, la mutazione di pratiche culturali e usi quotidiani.
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Törnesson, Martin. "The leadership and understanding of the unexpected failure of Operation Rolling Thunder." Thesis, Försvarshögskolan, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:fhs:diva-9156.
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Operation Rolling Thunder was a United States led operation, with the political aims of interdicting and preventing the North Vietnamese support of the South Vietnam rebellion, during the later stage of the Vietnam war. Despite being a superpower, Operation Rolling Thunder failed, and the USA lost the war. In this essay, the air power theorists John A. Warden and Robert A. Pape, and their theories regarding how air power should be used to reach success, are used to analyze this failure. The use of these theories in a parallel manner enables to comprehend empirical sources and in turn recognize anomalies in the decision making and missteps of the American leadership. By keeping the case of Rolling Thunder in focus and thereby try and understand what happened, the aim is to create an understanding for why the potent power of the US Air Force made an inadvertent turn despite exercising air superiority throughout most of the operation. This examination concludes that there were three deciding factors in the American failure, which are: (i) absence of efficient attacks against the North Vietnamese leadership, (ii) lack of correlation between strategy and political aim, (iii) lack of experience and communication within the American leadership.
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Liu, Junjiang. "On p-adic decomposable form inequalities." Thesis, Bordeaux, 2015. http://www.theses.fr/2015BORD0258/document.
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Soit F ∈ Z[X1, . . . ,Xn] une forme décomposable, c’est-à-dire un polynôme homogène de degré d qui peut être factorisé en formes linéaires sur C. Notons NF (m) le nombre de solutions entières à l’inégalité |F(x)| ≤ m et VF (m) le volume de l’ensemble {x ∈ Rn :|F(x)| ≤ m}. En 2001, Thunder [19] a prouvé une conjecture de W.M. Schmidt, énonçant que, sous des conditions de finitude appropriées, on a NF (m) << m n/d où la constante implicite ne dépend que de n et d. En outre, il a montré une formule asymptotique NF (m) = m n/d V (F) + OF (m n/(d+n−2)) où, cependant, la constante implicite dépend de F. Dans des articles ultérieurs, la préoccupation de Thunder était d’obtenir une formule asymptotique similaire, mais avec la borne supérieure du terme d’erreur |NF (m) −m n/dV (F)| ne dépendant que de n et d. Dans [20] et [22], il a réussi à prouver que si gcd(n, d) = 1, la constante implicite dans le terme d’erreur peut en effet être fonction uniquement de n et d. L’objectif principal de cette thèse est d’étendre les résultats de Thunder au cadre p-adique. `A savoir, nous sommes intéressés par les solutions à l’inégalité |F(x)| · |F(x)|p1 . . . |F(x)|pr ≤ m en x = (x1, x2, . . . ,xn) ∈ Zn avec gcd(x1, x2, . . . ,xn, p1 · · · pr) = 1. (5.4.9) où p1, . . . , pr sont des nombres premiers distincts et |·|p désigne la valeur absolue p-adique habituelle. Le chapitre 1 est consacré au cadre p-adique de ce problème et aux preuves des lemmes auxiliaires. Le chapitre 2 est consacré à l’extension des résultats de Thunder de [19]. Dans le chapitre 3, nous montrons l’effectivité de la condition sous laquelle le nombre de solutions de (5.4.9) est fini. Le chapitre 4 et le chapitre 5 généralisent les résultats de Thunder dans [20], [21] et [22]Let F ∈ Z[X1, . . . ,Xn] be a decomposable form, that is, a homogeneous polynomial of degree d which can be factored into linear forms over C. Denote by NF (m) the number of integer solutions to the inequality |F(x)| ≤ m and by VF (m) the volume of the set{x ∈ Rn : |F(x)| ≤ m}. In 2001, Thunder [19] proved a conjecture of W.M. Schmidt, stating that, under suitable finiteness conditions, one has NF (m) << mn/d where the implicit constant depends only on n and d. Further, he showed an asymptotic formula NF (m) = mn/dV (F) + OF (mn/(d+n−2)) where, however, the implicit constant depends on F. In subsequent papers, Thunder’s concern was to obtain a similar asymptotic formula, but with the upper bound of the error term |NF (m)−mn/dV (F)| depending only on n and d. In [20] and [22], hemanaged to prove that if gcd(n, d) = 1, the implicit constant in the error term can indeed be made depending only on n and d.The main objective of this thesis is to extend Thunder’s results to the p-adic setting. Namely, we are interested in solutions to the inequality |F(x)| · |F(x)|p1 . . . |F(x)|pr ≤ m in x = (x1, x2, . . . ,xn) ∈ Zn with gcd(x1, x2, . . . ,xn, p1 · · · pr) = 1. (5.4.3)where p1, . . . , pr are distinct primes and | · |p denotes the usual p-adic absolute value.Chapter 1 is devoted to the p-adic set-up of this problem and to the proofs of the auxiliary lemmas. Chapter 2 is devoted to extending Thunder’s results from [19]. In chapter 3, we show the effectivity of the condition under which the number of solutions of (5.4.3) is finite. Chapter 4 and chapter 5 generalize Thunder’s results from [20], [21] and [22]
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CARNAVALE, THIAGO DE SOUZA. "DEVELOPMENT OF A PHYSICAL MODEL FOR THE ANALYSIS OF THUNDER EFFECTS IN SOILS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2013. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=35624@1.
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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIROCOORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR
PROGRAMA DE EXCELENCIA ACADEMICA
O trabalho foi motivado pela grande incidência de descargas atmosféricas no desastre ocorrido na Região Serrana do Estado do Rio de Janeiro, em 2011. No episódio foram contabilizados mais de 900 óbitos e até o presente momento, as causas dos escorregamentos ainda não foram completamente encontradas. Esta pesquisa apresenta o desenvolvimento de um modelo físico para avaliar os efeitos das ondas sonoras, oriundas dos trovões, em solos. Para o alcance do referido objetivo, foi desenvolvida uma câmara à qual um bloco indeformado de solo foi instrumentado com tensiômetros, TDR s e acelerômetros. Os materiais utilizados nos ensaios são provenientes da encosta situada nos domínios da PUC-Rio e do condomínio localizado no bairro de Conquista - Nova Friburgo. Os solos foram dispostos em blocos livres ou confinados em uma caixa de compensado naval de 19 mm e a seguir os mesmo foram submetidos às ondas de sonoras replicadas da modelagem dos trovões. Os resultados abrangem o desenvolvimento de ensaios com umidades diferentes, para os dois tipos de materiais, nas condições livre e confinada, e foram satisfatórios.
The work was motivated by the high incidence of lightning in the disaster occurred in the mountainous region of the State of Rio de Janeiro in 2011. In the episode was recorded more than 900 deaths and up to the present time, the causes of landslides have not been fully met. This research presents the development of a physical model to assess the effects of sound waves coming from the thunder in soils. To achieve the above goal, we developed a camera to which an undisturbed block of soil, instrumented with tensiometers and TDR s accelerometers was tested on a table. The materials used in the tests are from hillside located in the areas of PUC-Rio and condo located in the Conquista, Nova Friburgo. Soils were willing blocks free or confined in a box of 19mm plywood and then were subjected to the sound waves replicated modeling of thunder. The results include the development of assays with different humidities for both types of materials and conditions, free and confined.
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Marks, Kristian Matthew. "“Like thunder and lightning:” British force projection in the West Indies, 1739-1800." The Ohio State University, 1999. http://rave.ohiolink.edu/etdc/view?acc_num=osu1283183447.
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Miller, Jeanette Leigh. "Beat Women: The Thunder Before the Storm-An Analysis of Feminism's Bridge Generation." OpenSIUC, 2014. https://opensiuc.lib.siu.edu/theses/1486.
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The 1950s saw the height of the Beat literature movement. Within this movement moved a cohort of women who helped revolutionize gender relations in the early Cold War era, leading to the emergence of the women's liberation movement of the 1960s and 1970s. By questioning social gender norms and harnessing their artistic, sexual, and economic autonomy, Beat women built lives of lived art outside proscribed social norms building the base for a new era in gender relations.
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Frenette, Margaret Elizabeth. "The Great War's defeats, doing your bit on Thunder Bay's home front, 1914-1919." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1996. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/MQ33375.pdf.
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Wang, Baoduo. "Loud thunder, small raindrops, how the market economy is redefining print media in China." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/MQ27032.pdf.
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Loope, Henry Munro. "Deglacial chronology and glacial stratigraphy of the western Thunder Bay lowland, northwest Ontario, Canada." Connect to Online Resource-OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1172777038.
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Kassel, Michael E. "Thunder on high Cheyenne, Denver and aviation supremacy on the Rocky Mountain Front Range /." Laramie, Wyo. : University of Wyoming, 2007. http://proquest.umi.com/pqdweb?did=1445035911&sid=1&Fmt=2&clientId=18949&RQT=309&VName=PQD.
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Harris, Ryan J. "Optimization and statistical evaluation of GOES cloud-top properties for nowcasting lightning initiation." Thesis, Monterey, California : Naval Postgraduate School, 2010. http://edocs.nps.edu/npspubs/scholarly/theses/2010/Mar/10Mar%5FHarris.pdf.
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Thesis (M.S. in Meteorology)--Naval Postgraduate School, March 2010.Thesis Advisor(s): Durkee, Philip A. Second Reader: Nielsen, Kurt E. "March 2010." Description based on title screen as viewed on April 27, 2010. Author(s) subject terms: Lightning, Thunderstorm, GOES, Geostationary, Satellite, Convection, Convective Initiation, Lightning Initiation, Nowcast, Applied Meteorology. Includes bibliographical references (p. 97-101). Also available in print.
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Fischer, Ronald W. "A comparative study of two Civil War prisons : Old Capitol prison and Castle Thunder prison /." Thesis, This resource online This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-02092007-102017/.
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Reuterbrink, Christopher. "Att Uppleva Tid : En Undersökande Läsning av The Time Machine och "A Sound of Thunder"." Thesis, Karlstads universitet, Institutionen för språk, litteratur och interkultur, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-36874.
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The purpose of the following essay is to examine various works of fiction featuring time travel and their underlying common theme. The main focus of the essay is the novella The Time Machine by H. G. Wells and the short story ”A Sound of Thunder” by Ray Bradbury, but a number of other texts from various different periods in time are also taken into account, mainly to provide a background for the analysis of the chosen texts. The essay is written based on the assumption that there are two distinct subcategories of time travel fiction. There is a significant difference in time travel literature written before and after The Time Machine: mainly because this work was written in a period when the concept of 'time' was changing in the public mind, due to the scientific and cultural advances in the fields of physics, philosophy and psychology. The conclusion of the study is that all examples of time travel fiction (or at least those brought up in this essay) share a common theme, namely the relation to the alien and the uncanny. Furthermore, the analysed texts seem to be firmly rooted in their respective era. Older time travel fiction in particular demonstrates that time travel is used as an alienating effect on the traveller, who is transported (willingly or not) into an unfamiliar time and is hopelessly lost in an inescapable situation. The alienation theme lives on in more modern examples of the narrative as well, but since the introduction of the The Time Machine, the time travelling protagonists have a way of fighting back against the alienation, by trying to take control of their unfamiliar situation.Syftet med följande uppsats är att undersöka olika litterära verk innehållande tidsresor, samt det underliggande gemensamma motivet. Uppsatsens huvudfokus är kortromanen The Time Machine av H. G. Wells och novellen ”A Sound of Thunder” av Ray Bradbury, men ett antal andra texter från olika tidsperioder tas också i beaktande, främst för att tillhandahålla en bakgrund för analysen av de utvalda texterna. Uppsatsen är baserad på antagandet att det i tidsreselitteraturen finns två distinkta underkategorier. Det finns en väsentlig skillnad i de verk som publicerades före respektive efter The Time Machine, vilket främst beror på att denna text skrevs i en tid då föreställningen om vad 'tid' är var på väg att förändras i det publika medvetandet, med anledning av de vetenskapliga och kulturella landvinningarna inom fysik, filosofi och psykologi. Studiens slutsats visar att all tidsreselitteratur (eller åtminstone de exempel som tas upp i uppsatsen) har ett gemensamt tema, nämligen relationen till det främmande och det kusliga. Vidare tycks de analyserade texterna vara tydligt förankrade i sina respektive tidsperioder. Äldre tidsreselitteratur i synnerhet använder sig av en alienerande effekt på resenären, som förflyttas (frivilligt eller ej) till en främmande tid och blir hopplöst förlorad i en ofrånkomlig situation. Alienationstemat lever vidare även i mer moderna tidsreseexempel, men sedan The Time Machine publicerades har de tidsresande protagonisterna möjligheten att slå tillbaka mot alienationen genom att försöka (och ibland till och med lyckas) att ta kontroll över den obekanta situationen.
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Shine, Matthew David. "Gotta Travel On: A View of the American Road from Bob Dylan's Rolling Thunder Revue, 1975." W&M ScholarWorks, 1992. https://scholarworks.wm.edu/etd/1539625713.
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Bottan, Brian J. "Exploring the human dimension of Thunder Bay moose hunters with focus on choice behaviour and environmental preferences." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/MQ52042.pdf.
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Engström, Victor. "Funktionen av stokastisk musik i datorspel : En undersökning av stokastiskt rekombinerad musiks påverkan i spelet Thunder League." Thesis, Högskolan i Skövde, Institutionen för informationsteknologi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-12846.
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Denna studies syfte var att undersöka om det finns någon skillnad i hur stokastiskt rekombinerad musik upplevs jämfört med linjär musik i datorspelet Thunder League (2015, Hellion Studios). Åtta informanter spelade två olika versioner av spelet, en med stokastiskt rekombinerad och en med linjär uppspelning av samma musik. Därefter intervjuades de om sin upplevelse och vilka skillnader de lade märke till mellan versionerna. Resultatet på undersökning visar att informanterna oftare tyckte att den stokastiskt rekombinerade musiken var bättre än den linjära. Resultatet visade också att informanterna inte överväldigande upplevde någon av metoderna mindre repetitiv. Frågan skulle kunna undersökas igen för att säkerställa resultaten igenom till exempel en större undersökning med tillhandahållande av spelet och formulär över internet för att på ett mer resurseffektivt sätt nå ut till fler människor.
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Goldstein, Andre L. "Control of Sound Transmission with Active-Passive Tiles." Diss., Virginia Tech, 2006. http://hdl.handle.net/10919/27913.
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Nowadays, numerous applications of active sound transmission control require lightweight partitions with high transmission loss over a broad frequency range and simple control strategies. In this work an active-passive sound transmission control approach is investigated that potentially addresses these requirements. The approach involves the use of lightweight stiff panels, or tiles, attached to a radiating base structure through active-passive soft mounts and covering the structure surface. The resulting double-partition configuration was shown to have good high frequency passive isolation, but poor low frequency transmission loss due to the coupling of the tiles to the base vibration through the air gap. The low frequency transmission loss performance of the partition was increased by using the active mounts to cancel the local volume velocity of the tiles. The use of a decentralized control approach with independent single channel controllers for each tile facilitates the implementation of a multiple tile system in a large scale application.
A coupled structural-acoustic model based on an impedance mobility matrix approach was formulated to investigate the potential performance of active-passive tile approach in controlling sound transmission through plates. The model was initially applied to investigate the sound transmission characteristics of a double-panel partition consisting of a single tile-plate configuration and then extended to model a partition consisting of multiple-tiles mounted on a plate. The system was shown to have significant passive performance above the mass-spring-mass resonance of the double-panel system. Both feedback and feedforward control approaches were simulated and shown to significantly increase the transmission loss of the partition by applying control forces in parallel with the mounts to reduce the tile normal velocity. A correspondent reduction in sound radiated power was obtained over a broad frequency range limited by the tile stiffness.
The experimental implementation of the active-passive tile approach for the control of sound transmission through plates was also performed. Two main experimental setups were utilized in the investigations, the first consisting of a single tile mounted on a clamped plate and the other consisting of four active tiles mounted of a simply supported plate. Tile prototypes were implemented with lightweight stiff panels and integrated active-passive mounts were implemented with piezoelectric Thunder actuators. Both analog feedback and digital feedforward control schemes where designed and implemented with the objective of reducing the normal velocity of the tiles. Experimental results have demonstrated significant broad frequency range reductions in the sound transmission through the partition by active attenuation of the tile velocity. In addition, the experiments have shown that decentralized control can be successfully implemented for multiple tiles systems. The active-passive sound transmission control characteristics of the systems experimentally studied were observed to be in accordance with the analytical results.Ph. D.
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Prichard, Susan J. "Spatial and temporal dynamics of fire and vegetation change in Thunder Creek watershed, North Cascades National Park, Washington /." Thesis, Connect to this title online; UW restricted, 2003. http://hdl.handle.net/1773/5601.
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Green, Christopher W. "Low Frequency Energy Harvesting Using Clamped Pre-Stressed Unimorph Diaphragms." VCU Scholars Compass, 2006. http://scholarscompass.vcu.edu/etd_retro/30.
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Wireless sensors are an emerging technology that has the potential to revolutionize the monitoring of simple and complex physical systems. One of the biggest challenges with wireless sensors technology is power management and hence cost. A wireless sensor system incapable of managing its power consumption either by maintaining long battery life and/or harvesting from its surroundings, is simply not cost effective. Prolonging or eliminating the battery entirely would reduce the cost of battery replacement and maintenance. A viable family of materials for this purpose is piezoelectric materials because of their inherent ability to convert vibrations into electrical energy. Currently, a wide variety of piezoelectric materials are available and the appropriate choice for harvesting energy depends on their characteristics and properties. In addition to the material choice, energy harvesting circuitry is needed to efficiently convert and filter the signal from the piezoelectric device into a form that can be used by a load (battery). This thesis addresses the theoretical and experimental use of a type of pre-stressed PZT-5A Unimorph called a Thunder® to actively convert mechanical vibrations into useable power. Two types of devices of Thunder diaphragms are used: (1) a composite made of stainless steel, plain polyimide, a piezoelectric layer, plain polyimide, and copper; (2) and a second composite made with the same materials except that micro nickel inclusions are suspended into the polyimide layer. The first type produced a maximum average power of 2,585μW (~2.6mW) with a power density of 1411μW/cm2 (~1.4mW). The maximum total energy was 541,114μJ (~0.54J). The second type produced a maximum average power of 3,800μW (~3.8mW) with a power density of 2,073μW/cm2 (~2mW/cm2). The maximum total energy produced 1,187,939μJ (~1.19J). Based on these energy calculations, it was found that a plain polyimide diaphragm could theoretically charge a 1000mA-hr battery in a range from 3.32 hours to 32.32 hours depending on the energy harvesting circuit while nickel polyimide diaphragm could charge it in a range from 3.38 hours to 20.01 hours. These results show that THUNDER can effectively generate power from a steady sinusoidal source at frequencies below 10 Hz for the charging of batteries or for directly powering a device.
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Gallin, Louis-Jonardan. "Caratérisation acoustique des éclairs d'orage." Thesis, Paris 6, 2014. http://www.theses.fr/2014PA066418/document.
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L'objectif est d'étudier la transformation du tonnerre (amplitude, spectre) pendant sa propagation depuis le canal d'éclair jusqu'à un détecteur en se basant sur deux approches complémentaires. Dans un premier temps, l'analyse des enregistrements acoustiques (audibles et infrasons) obtenus par un réseau acoustique de petite taille (50 mètres), durant une campagne d'observations qui s'est déroulée dans le Sud de la France (Automne 2012), nous fournit des cartes 3D des sources infrasonores présentes dans un canal de foudre. Nous montrons qu'elles sont parfaitement corrélées aux résultats fournis par des outils électromagnétiques très précis. Des spectres de tonnerre ont pu être associés aux différentes phases de la décharge. Des caractéristiques acoustiques (fréquence, amplitude) ont pu être précisément reliées aux différentes sources acoustiques identifiées à l'intérieur des éclairs. Il apparaît que la propagation de l'onde acoustique perturbe la localisation pour les distances supérieures à 20km. Dans un second temps le code de calcul Flhoward a été développé pour simuler la propagation non linéaire des ondes de choc acoustiques à travers un modèle de météo réaliste. Il permet d'étudier les formes d'ondes au cours de leur propagation. La simulation numérique avec Flhoward aide à comprendre l'impact des profils météorologiques sur la propagation des signatures de tonnerreThe goal is to study the transformation of thunder (amplitude, spectrum) during its propagation from to lightning channel towards a detector, based on two complementary approaches.In a first time, the analysis of the acoustic records (audible and infrasounds) obtained with an acoustic network of small size (50 meters), during an observation campaign which took place in South of France (Autumn 2012), produces 3D maps of infrasounds sources present in a lightning channel.We show they are perfectly correlated to results obtained from very precise electromagnetic tools.Frequency contents were successfully associated to the different parts of the discharge.Acoustic parameters (frequency, amplitude) were clearly linked to the different acoustic sources identified inside the lightning channels.It appears that the propagation of the acoustic wave impacts the localization for distances greater than 20km.In a second step, the computing code Flhoward was developed to simulate the nonlinear propagation of acoustic shock waves through a realistic meteorological profile.It allows to study the waveforms during their propagation.The numerical simulation with Flhoward helps to understand the impact of the meteorological profiles on the propagation of the thunder signatures
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Aimmanee, Sontipee. "Deformation and Force Characteristics of Laminated Piezoelectric Actuators." Diss., Virginia Tech, 2003. http://hdl.handle.net/10919/11219.
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This research discusses the mechanical characteristics of laminated piezoelectric actuators that are manufactured at an elevated temperature, to cure the adhesive bonding the layers together, or to cure the layers made of polymeric composite material, and then cooled to a service temperature. Mainly discussed are actuators that are composed of layers of passive materials and a layer of piezoelectric material. THUNDER (THin layer UNimorph ferroelectric DrivER and sensor) and LIPCA (LIghtweight Piezo-composite Curved Actuator) actuators, which consist of layers of metal, adhesive and piezoelectric material, and carbon-epoxy, glass-epoxy and piezoelectric material, respectively, are studied and investigated in detail to understand the thermal effects due to the elevated manufacturing temperature. Owing to the large out-of-plane deformations of the THUNDER actuators as a result of cooling to the service temperature, inclusion of geometric nonlinearities in the kinematic relations is taken into consideration for prediction of the thermally-induced deformations and residual stresses. The deformations and residual stresses are predicted by using a 23-term Rayleigh-Ritz approach and more rigorous, time-consuming, finite-element analyses performed with ABAQUS. The thermally-induced deformations of THUNDER actuators can result in multiple room-temperature manufactured shapes, whereas those of LIPCA actuators (LIPCA-C1 and LIPCA-C2) exhibit single room-temperature manufactured shape. Actuation responses of these actuators caused by a quasi-static electric field applied to the piezoelectric layer are also studied with the Rayleigh-Ritz approach. It is shown that geometrical nonlinearities play an important role in the actuation responses, and these nonlinearities can be controlled by the choice of actuator geometry and the materials in the passive layers. In addition, blocking forces representing load-carrying capability of THUNDER and LIPCA actuators are determined. Support conditions and again geometrical nonlinearities are vital factor in load-resisting performances. Amongst the actuators considered, the actuated deflection and blocking forces are compared. Finally, based on the outcome of this study, new criteria for designing a new type of laminated piezoelectric actuators with improvement of performance characteristics are proposed.Ph. D.
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Gause, Matěj. "Marketing počítačové hry z pohledu youtubera." Master's thesis, Vysoká škola ekonomická v Praze, 2015. http://www.nusl.cz/ntk/nusl-201805.
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The goal of the dissertation Marketing of PC game from the view of Youtuber is to characterize the latest practices in influencing masses of players of War Thunder PC game through video service Youtube and social network Facebook. This is a real project during which author created a large community of fans around the game counting more than 10 000 people on Youtube and almost 4 500 people on Facebook. Author applied the latest trends and the most innovative practices in connection with a traditional promotion of gaming content. This work shows that both channels can have a positive impact on the gaming company revenue from microtransactions based on freemium business model. Author also describes detailed and comprehensive view on one of the biggest gaming phenomenon in history.
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Gallo, Antonio. "Temporal variation in the carabid (Coleoptera: carabidae) community structure at five sites east of a kraft paper mill in Thunder Bay, Ontario /." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape16/PQDD_0002/MQ33376.pdf.
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Mane, Poorna. "Experimental Design and Analysis of Piezoelectric Synthetic Jets in Quiescent Air." VCU Scholars Compass, 2005. http://scholarscompass.vcu.edu/etd/768.
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Flow control can lead to saving millions of dollars in fuel costs each year by making an aircraft more efficient. Synthetic jets, a device for active flow control, operate by introducing small amounts of energy locally to achieve non-local changes in the flow field with large performance gains. These devices consist of a cavity with an oscillating diaphragm that divides it, into active and passive sides. The active side has a small opening where a jet is formed, whereas and the passive side does not directly participate in the fluidic jet.Research has shown that the synthetic jet behavior is dependent on the diaphragm and the cavity design hence, the focus of this work. The performance of the synthetic jet is studied under various factors related to the diaphragm and the cavity geometry. Four diaphragms, manufactured from piezoelectric composites, were selected for this study, Bimorph, Thunder®, Lipca and RFD. The overall factors considered are the driving signals, voltage, frequency, cavity height, orifice size, and passive cavity pressure. Using the average maximum jet velocity as the response variable, these factors are individually studied for each actuator and statistical analysis tools were used to select the relevant factors in the response variable. For all diaphragms, the driving signal was found to be the most important factor, with the sawtooth signal producing significantly higher velocities than the sine signal. Cavity dimensions also proved to be relevant factors when considering the designing of a synthetic jet actuator. The cavities with the smaller orifice produced lower velocities than those with larger orifices and the cavities with smaller volumes followed the same trend. Although there exist a relationship between cavity height and orifice size, the orifice size appears as the dominant factor.Driving frequency of the diaphragm was the only common factor to all diaphragms studied that was not statistically significant having a small effect on jet velocity. However along with waveform, it had a combined effect on jet velocity for all actuators. With the sawtooth signal, the velocity remained constant after a particular low frequency, thus indicating that the synthetic jet cavity could be saturated and the flow choked. No such saturation point was reached with the sine signal, for the frequencies tested. Passive cavity pressure seemed to have a positive effect on the jet velocity up to a particular pressure characteristic of the diaphragm, beyond which the pressure had an adverse effect. For Thunder® and Lipca, the passive cavity pressure that produced a peak was measured at approximately 20 and 18kPa respectively independent of the waveform utilized. For a Bimorph and RFD, this effect was not observed.Linear models for all actuators with the factors found to be statistically significant were developed. These models should lead to further design improvements of synthetic jets.
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Williams, Sandra Deena Seodial. "Destruction of the Caribbean Landscape Through Colonization in Edgar Mittelholzer's Corentyne Thunder, Jean Rhys' Wide Sargasso Sea, and Wilson Harris' Palace Of The Peacock." [Greenville, N.C.] : East Carolina University, 2010. http://hdl.handle.net/10342/2834.
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Pecora, Alethea Aires. "Trovão: eu sou... entre a paz e a violência: um estudo sobre trovão - mente perfeita da biblioteca copta de Nag Hammadi." Pontifícia Universidade Católica de São Paulo, 2012. https://tede2.pucsp.br/handle/handle/1865.
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This dissertation focuses on Thunder: Perfect Mind, cryptic writing found among the dozens of other titles (mostly unknown until then) that make up what is now called the Nag Hammadi Library, produced between the third and fourth centuries of our era. After a presentation of the latter, with the codex that make up (a task we set ourselves in the first chapter of this work), we propose an approach to Thunder, that offer a translation and a commentary on all the units that compose it (Chapter II). From here we review the opinions that have been issued regarding this writing, and especially question the characterization of the writing as a Gnostic (Chapter III). At the end we launched a few suggestions for a renewed approach of the writing, pointing to the possibility of a dual origin for it, sending it to both the mythical universe of Middle Eastern world as to the everyday of violence experienced particularly by women of that social-history context
A presente dissertação concentra-se em Trovão: Mente Perfeita, enigmático escrito encontrado em meio a dezenas de outros títulos (quase todos desconhecidos até então), que compõem o que hoje se chama Biblioteca de Nag Hammadi, produzida entre os séculos III e IV de nossa era. Após uma apresentação desta última, com os códices que a compõem (tarefa a que nos propusemos no primeiro capítulo deste trabalho), propomos uma aproximação a Trovão, de que oferecemos uma tradução e um comentário do conjunto das suas unidades (capítulo II). A partir daí passamos em revista as opiniões que têm sido emitidas a respeito desta obra, e especialmente questionamos a caracterização do escrito como gnóstico (capítulo III). Ao final, lançamos algumas sugestões para uma renovada abordagem do escrito, apontando para a possibilidade de uma dupla origem para ele, remetendo-o tanto ao universo mítico do mundo médio-oriental como para a experiência cotidiana de violência vivida particularmente por mulheres daquele contexto sócio-histórico.
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Jansson, Erik. "Kombinerade vapen : hur det kan förklara taktisk framgång." Thesis, Försvarshögskolan, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:fhs:diva-9255.
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A trend in modern warfare is to conduct war both conventionally and unconventionally. This modern era sets high demands on conventional forces to face the contemporary threat. Most of the modern conventional forces conduct war through maneuver warfare and uses the practice of combined arms to organize and fight, but is the method of combined arms still a valid method? This study examines Robert Leonhard’s theory of combined arms in the Yom Kippur war 1973 and during the American Thunder Runs in Baghdad 2003. The research question that this study is trying to answer is how the combined arms theory can explain the tactical success in the two cases. Previous studies about the theory explains how it could be understood, not how it is used. The theory encompasses three principles which is applied to the two cases to allow a structured analysis. The results show that both the Israelis and the Americans use the combined arms theory to achieve tactical success. What the analysis also shows is that the theory is not the only element that achieved success, but also technical advantage, moral and experience made an impact on the outcome of the cases.
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Schwantje, Travis R. "Towards a Formal Total Synthesis of Triptolide Via a Gold-catalyzed Cyclization Cascade." Thèse, Université d'Ottawa / University of Ottawa, 2013. http://hdl.handle.net/10393/23712.
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This thesis discusses the progress made towards a formal total synthesis of triptolide, a naturally occurring diterpenoid triepoxide molecule. Isolated from a Chinese vine, triptolide features some interesting structural characteristics and has demonstrated a broad range of interesting medicinal effects. It has demonstrated remarkable cytotoxicity against a number of cancer cell lines, immunosuppressive activity, and reversible male sterility. This biological activity has made it a target of a number of total syntheses spanning from 1980 to 2010.
Gold-catalyzed transformations are an emerging field in synthetic organic chemistry, but their efficacy and potential uses are gaining much recognition among the synthetic organic community. Our research group is extremely interested in the applications of such gold-catalyzed organic transformations in natural product synthesis. Here, we discuss our investigations towards accessing the tetracyclic core of triptolide using a gold-catalyzed cyclization cascade reaction.
We explored a number of synthetic routes towards a common linear precursor, and our successes and failures are discussed herein. We also report numerous unsuccessful efforts towards an oxidative gold-catalyzed cyclization cascade to form the tetracyclic core of triptolide. Finally, we investigated the use of a photocatalytic radical cyclization cascade to access the desired core. We report some promising preliminary results, and this study is ongoing in the Barriault group.
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Romagnoli, Matteo. "Sviluppo e integrazione in ambiente di simulazione di modelli tridimensionali per la rappresentazione grafica della dinamica di velivoli ad ala rotante." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2020.
Find full textAbstract:
Sin dallo sviluppo dei primi velivoli in grande scala si è evidenziata la necessità di poter usufruire di modelli matematici e di simulazione dinamica che potessero restituire stime affidabili del comportamento che i prototipi sottoposti ai test avrebbero potuto presentare in volo.
La capacità di poter prevedere i comportamenti che i velivoli sviluppano in contesti operativi si rivela la soluzione vincente per risparmiare denaro e per poter identificare tutte quelle manovre che possono costituire un pericolo, sia per quanto riguarda problemi di carattere aeroelastico e strutturale, sia, di conseguenza, per la vita dei collaudatori e per quella dei futuri occupanti del mezzo.
Tali simulazioni mantengono inizialmente livelli di difficoltà di modello minimi per poi affinarsi per approssimazioni successive, passo dopo passo, con lo scopo di fornire una sempre più precisa previsione del comportamento in volo del velivolo.
Lo scopo del seguente lavoro di tesi è proporre il modello di un elicottero in scala a pilotaggio remoto disegnato in ambiente CAD e implementato in ambiente Simulink® SimScape. La finalità del lavoro qui proposto è schematizzare in maniera il più semplice possibile la meccanica di volo di un elicottero riducendo le attuazioni a: rotazione del rotore principale, rotazione del rotore di coda, inclinazione del passo delle pale del rotore principale, inclinazione del passo delle pale del rotore di coda, assetto del velivolo.
Per fare ciò i passi fondamentali sono essenzialmente due:
la modellazione del velivolo nelle sue componenti fondamentali (fusoliera, rotore principale e di coda, pale) e le simulazioni in ambiente matematico per mezzo di input forniti dall’esterno.
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Cepeda, Raquel. "Three-dimensional seismic stratigraphic interpretation of the upper miocene to lower pleistocene deep-water sediments of the Thunder Horse-Mensa area, southern Mississippi Canyon, northern deep Gulf of Mexico." Diss., Connect to online resource, 2005. http://wwwlib.umi.com/cr/colorado/fullcit?p1427771.
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Lacroix, Arthur. "Reconstruction, caractérisation et modélisation acoustiques des éclairs d'orages." Thesis, Sorbonne université, 2018. http://www.theses.fr/2018SORUS428.
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Le tonnerre est le son produit par les éclairs. Bien qu’audible, il contient une importante composante infrasonore (f < 20Hz) dont l’origine est toujours en débat. Le tonnerre a été mesuré, dans le cadre de la campagne européenne HyMeX, pendant deux mois (septembre – octobre 2012), dans les Cévennes à partir de deux réseaux de capteurs couvrant la bande de fréquence [0.5–180] Hz. La participation à cette campagne a également permis d’obtenir des mesures électromagnétiques donnant la localisation au sol des décharges de foudre (réseau opérationnel EUCLID) et la reconstruction tridimensionnelle de la décharge orageuse (réseau de recherche HyLMA). De cette base de données, vingt-sept flashes ayant eu lieu à moins de 25 km de la station ont été sélectionnés. Une méthode acoustique originale, permettant la reconstruction et la séparation des différentes composantes d’un même flash a été développée, permettant d’isoler le contenu acoustique des arcs en retour et de montrer sans ambiguïté qu’ils émettent la majorité de l’énergie acoustique, en particulier les infrasons. Par ailleurs, une étude statistique a montré une forte dépendance de certains paramètres acoustiques, telle l’énergie acoustique, à la distance à l’éclair. Un nouveau modèle théorique a ensuite été développé et a montré que le caractère cylindrique de l’éclair favorise l’émanation des infrasons tandis que la tortuosité du canal de foudre apporte une très forte variabilité à champ proche. Les résultats statistiques sur la simulation montrent un très bon accord avec les mesures du terrain. Enfin, un lien entre l’énergie déposée à la source et l’énergie acoustique par longueur de l’éclair a été mis en évidenceThunder is the sound made by lightning. In addition to the audible content thunder also includes an important infrasound component (f < 20Hz). The origin of this component is still in debate. In the context of the European campaign HyMeX, thunder was recorded in the Cevennes through two sensors networks covering the frequency range [0.5–180.0] Hz). Electromagnetic measures were also obtained allowing to locate stroke impact location (EU- CLID operational network) and build 3D reconstruction of the storm cell (HyLMA research network). 27 flashes occurring less than 25 km from the station were selected. An original method allowing the separation, within the acoustical signal, of Cloud-to-Ground (CG) from Intra-Cloud (IC) parts of the discharge was developed. A total of 36 CG signals and associated spectra was obtained, along with IC signals and shows clearly that the main origin of infrasound is the CG. Moreover, a statistical study has shown a strong dependency of some acoustical parameters such as the acoustical energy and the distance to the lightning stroke. These new results cannot be explained by the two existing models. That is why a new one was developed. Many cases of simulated thunder have been carried out and have shown that the cylindrical and extended aspect of the lightning channel favors infrasound emission while the tortuous shape leads to a strong variability in the close field. Statistical analysis like the one lead on the experimental data was realized to compare the model to the field measures. Results show a good agreement between both. Finally, a link between source released energy and acoustic energy was shown
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Emelie, Wennerdahl. "Change in Thunderstorm Activity in a Projected Warmer Future Climate: a Study over Europe." Thesis, Uppsala universitet, Luft-, vatten och landskapslära, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-337148.
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In the last 100 years, a rise in the global mean temperature has been noted, and projections show even higher temperatures in the future. The temperature rise can lead to changes in the weather patterns and therefore the thunderstorm activity in a future warmer climate has been investigated in this study. The future projections were made with an ensemble of 8 General Circulation Models downscaled with the regional climate model RCA4, developed at SMHI. Temperature and humidity data at four different levels in the atmosphere has been used to compute three different stability indices. Stability indices indicate potential for deep convection in the atmosphere, from which thunderstorms are developed. It was found that the projections show an increase in thunderstorm potential in a warmer future climate. In Sweden, the projections show an increase with about 15 more days with risk of thunderstorms at the end of the 21st century for the RCP4.5 scenario, corresponding to an increase of 40% in the south, and an even larger increase in the north. For the RCP 8.5 scenario, the projected change in days with risk of thunderstorms corresponds to an increase about 20 days, or about 60% more thunderstorm days in south of Sweden. In other parts of Europe, the increase is expected to be even larger, mainly in the mountain regions. It was also found that the thunderstorm season is projected to be extended in the future, with more days with risk of thunder in May and September. The increase in number of days with risk of thunderstorms is a result of the greater amount of water vapour that the atmosphere is able to hold in a warmer climate. Even if thunderstorms are projected to increase, other factors counteract, such as a decrease in the vertical temperature gradient and a decrease in the difference between moisture in the upper and the middle atmosphere. Yet, taken together the days with risk of thunderstorms are projected to become more frequent.Under de senaste hundra åren har medeltemperaturen på jorden ökat med cirka 1°C, vilket har medfört förändringar i klimatet. Temperaturen kommer att fortsätta stiga på grund av den redan förhöjda halten växthusgaser i atmosfären, och om växthusgaser fortsätter släppas ut kan det förväntas bli ännu varmare. I och med att temperaturen fortsätter stiga är det mycket som pekar på att vädret i allmänhet kommer förändras, som till exempel förändrat mönster i åskoväder. I denna studie har risken för åska i ett framtida klimat studerats. Åska och konvektion bildas framförallt på grund av tre komponenter: instabilitet i atmosfären, fuktigheten i luften och en mekanism som får luften att lyftas från marken. En instabil luftmassa fås framförallt en varm sommardag när solen värmer marken, vilket medför att luften vid marken blir betydligt varmare än luften ovanför. Den andra faktorn är beroende av fuktigheten i luften, om luften är tillräckligt fuktig finns risk att större åskmoln kan bildas. De första två faktorerna kan beskrivas med vad som kallas stabilitetsindex. I denna studie beräknades risken för djup konvektion med hjälp utav stabilitetsindex. Temperatur-och fuktighetsdata från den regionala klimatmodellen RCA4, framställd på SMHI, användes för att beräkna dessa stabilitetsindex. Studien visar på att dagar med risk för åska förväntas öka i slutet av detta seklet med omkring 10-15 dagar per år över Sverige, med ännu fler dagar med risk för åska i södra Europa. En förhöjd åskrisk kan även förväntas vid bergskedjor så som svenska fjällen och Alperna. Den främsta anledningen till att åska förväntas bli vanligare är till följd av att temperaturstigningen möjliggör högre halt vattenånga i atmosfären, och därmed kommer fuktigheten i luften att öka. En längre åsksäsong har även noteras, med tidigare start i maj, och även förlängd i september.
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Cicero-Erkkila, Erica Eileen. "Negotiating Self: Strategies of Selfhood in Austen, Brontë, and Alcott." Kent State University Honors College / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=ksuhonors1336078019.
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Bittner, David. "Gonad deformations in whitefish (Coregonus spp.) from Lake Thun, Switzerland : a population genetic and transcriptomic approach /." [S.l.] : [s.n.], 2009. http://www.ub.unibe.ch/content/bibliotheken_sammlungen/sondersammlungen/dissen_bestellformular/index_ger.html.
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