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Filote, Andra [Verfasser]. "Three Empirical Studies in Political Economics / Andra Filote." Konstanz : Bibliothek der Universität Konstanz, 2016. http://d-nb.info/1133479863/34.
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Dvořák, Petr. "Přizpůsobený filtr." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-218956.
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The main objective of this work is to study methods of reducing BER and suggest possible resolution of matched filter. In the first part, the methods are theoretically analyzed and subsequently their function models are sugested in the computer programme Matlab Simulink. On these models, the behaviour for different input values is simulated and on their basis, the output depending on probability of the false income on SNR for each of models is worked out. In the second part, the design of the laboratory preparation with a view to the matched filter is described. This suggestion is divided into the parts which are subsequently described and outputs from the implementation of the suggested resolution are added. Thereinafter, the implementation of the proposed resolution and the results achieved at measurement of the realized produkt are closely described. This product is to be made for educational and laboratory purposes in terms of lessons The Theory of Communication.
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Tjus, Emil, and Henrik Gustafsson. "Fillet optimization on impact piston." Thesis, Örebro universitet, Institutionen för naturvetenskap och teknik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-29863.
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At Örebro University, a part of the Bachelor of Science in Mechanical Engineering, a degree project of 15 credits is to be made at the end of the education. This project can be performed at the university or at a company, and the purpose is to prepare the student for the upcoming employment after examination. This degree project were performed by Emil Tjus and Henrik Gustafsson during the spring of 2013 at Atlas Copco Rock Drills AB in Örebro on the department of Applied Mechanics. The subject of this project was to configure and execute an optimization of a fillet on an impact piston from Atlas Copco Rock Drills AB. The reason to optimize the fillet were founded in the wish to increase the fatigue lifetime of the impact piston. The optimization was performed in HyperWorks 12.0, a software that the department of Applied Mechanics not normally uses. This caused finite element models from previous work to be converted and evaluated to ensure that the models were correct configured in HyperWorks. The steps that was taken in HyperWorks towards an optimization were done by setting up an approach called Design Of Experiments. The results were then evaluated in the next step, an approach called Fit. After this step, an approach called Optimization were run to generate specific design parameters with the lowest possible stress range of the model. These parameters were then applied to a finite element model and an analysis was made to verify the result from the optimization. The results of the optimization lowered the total stress range in a fictitious impact piston from 1146,1 MPa to 717,4 MPa. This result was to be compared with the reference value of 604,7 MPa and the reference impact piston had a simple radial fillet. The result of this project did not yield any improvements of the impact piston. However, an optimization of the fillet was configured and completed in HyperWorks and this can hopefully be at use in future analysis.Vid Örebro universitet, en del av högskoleingenjörsexamen i maskinteknik, skall ett examensarbete om 15 hp göras i slutet av utbildningen. Detta projekt kan utföras vid universitetet eller på ett företag och syftet är att förbereda studenten för kommande arbetsliv. Detta examensarbete utfördes av Emil Tjus och Henrik Gustafsson under våren 2013 på Atlas Copco Rock Drills AB i Örebro på avdelningen Applied Mechanics. Ämnet för detta projekt var att konfigurera och genomföra en optimering av en radieövergång på en slagkolv från Atlas Copco Rock Drills AB. Orsaken till optimeringen av radieövergången är en önskan att öka utmattningslivslängden på slagkolven. Optimeringen utfördes i HyperWorks 12.0, en programvara som avdelningen Applied Mechanics normalt inte använder. Finita element modeller från tidigare arbeten behövde därför konverteras och utvärderas för att säkerställa att modellerna var korrekt konfigurerade i HyperWorks. De moment som vidtagits i HyperWorks mot en optimering utfördes genom ett steg kallat Design Of Experiments. Detta steg korskör 3 geometrier med 5 olika värden i totalt 125 olika analyssteg. Resultaten utvärderades i nästa steg som kallas Fit. Vidare startades optimeringsalgoritmen vilket genererade specifika värden på de designvariabler som resulterade i en geometri med lägsta möjliga spänningsomfång. Dessa värden applicerades sedan på en finita element modell och gjordes en analys för att verifiera resultatet från optimeringen. Resultatet av optimeringen sänkte den totala spänningsvidden i en fiktiv slagkolv från 1146,1 MPa till 717,4 MPa. Resultatet jämfördes med referensvärdet på 604,7 MPa och referenskolven hade en enkel radieövergång. Resultatet av detta projekt gav inte några förbättringar av slagkolven jämfört med referensvärdet. Emellertid konfigurerades och genomfördes en optimering av radieövergången i HyperWorks vilket kan ses som en möjlighet för framtida analyser.
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Filous, Michael N. [Verfasser]. "Lizenzierungsgerechte Produktentwicklung / Michael N. Filous." München : Verlag Dr. Hut, 2012. http://d-nb.info/1022535110/34.
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Myers, James C. (James Clinton). "Behavior of fillet sealant joints." Thesis, Massachusetts Institute of Technology, 1989. http://hdl.handle.net/1721.1/14301.
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Fröhlich, Lubomír. "Adaptivní kmitočtový filtr." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2008. http://www.nusl.cz/ntk/nusl-217533.
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ABSTRACT My diploma thesis is called „Adaptive frequency filter“ and I divided it into four parts. I read up basic qualities of selective functional block 1. and 2. rate of ARC filters at the beginning. Next, I processed possibilities of analogue and digital control of active RC filters´ parameters. The second part deals with a suitable choice of universal functional block 2. rate realizing more types of transfer functions. To the effect I chose Ackerberg – Mossberg´s wiring of universal filter, and I made a designs of particular parameters for it. In the third part I focused on simulations of this filter by the help of the programme Spice for different values and operating opportunities of its parameters. At the close of my diploma work I created a functional sample and I made many experimental metering with both analogue and digital control.
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Kříž, Petr. "Adaptivní kmitočtový filtr." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2010. http://www.nusl.cz/ntk/nusl-218632.
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The aim of this work is to design a filter of the type low–pass of order 5th with Butterworth’s approximation in the range of over-tuning 10 – 100 kHz and if it will be possible so! achieve even higher marginal frequencies. To compare two typical representatives of the frequency filters cascading and non-cascading synthesis from the viewpoint the accuracy of an! approximation function, sensitivity to the tolerance values of components, number of the components (mainly OZ) and viability, especially the possibility of electronic over-tuning in selected frequency range. On the basis of these conditions will be chosen one design, which will be realized later. Further it will be necessary to consider the possibilities of electronic over-tuning and to choose for this over-tuning suitable component, to design user management changes of marginal frequency fm by the help of keyboard + LCD and control application on the PC. For this hardware will be programmed appropriate control software. At the end of this work will be constructed appropriate device, which fullfils requirements written above and will be subjected to the laboratory measurements that verify function of this device. The constructional details of the filter are presented in the enclosure at the end of this work. At the CD are available all materials, which were created during the master’s thesis or which are necessarily concerned.
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Liang, Li. "Analyses of failures of fillet welds." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/43340.
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MERIAUX, CATHERINE. "Transport de magmas dans les filons." Paris 7, 1996. http://www.theses.fr/1996PA077098.
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Le transport de magma dans des filons est traite dans deux situations geodynamiques. La premiere concerne l'ascension verticale de magma au travers de la lithosphere. Elle est traitee dans un espace a deux dimensions. L'ecoulement du fluide visqueux est envisage au travers de deux plaques elastiques, dont la hauteur delimite la distance entre la surface terrestre et le reservoir de magma. Il est montre que l'ascension est conditionnee par l'initiation des filons dans la lithosphere. La montee de magma est caracteristique de trois phases successives marquees par une vitesse quasi constante, une periode d'acceleration et, a l'arrivee a la surface, une deceleration. L'ascension s'accompagne du transport quasi-passif d'une zone d'activite elastique. L'autre situation concerne les zones de rifts volcaniques. Elle est appliquee au volcan kilauea a hawaii. Il est montre trois points. L'activite eruptive localisee le long des rifts est associee a de larges reservoirs superficiels soumis a de faible taux d'injection qui resulte d'une source profonde. Le comportement oscillatoire observe sur ce type de volcan et, notamment signale par des sequences d'inflation-deflation du reservoir superficiel, n'est pas conciliable avec un systeme hydraulique connecte depuis une source profonde a pression constante a la zone de rift. Deux raisons sont invoquees. Les effets possibles de perturbations a partir d'un etat quasi-stationnaire, qui est montre associe a un faible flux profond, sont exclues. Elles ne sont pas de type oscillatoire. Quelles que soient les conditions dynamiques, l'injection de la zone de rift ne correspond a aucune deflation du reservoir superficiel. L'alternative d'un modele qui necessite une montee en pression du reservoir jusqu'a un seuil de rupture est testee. Les deflations obtenues sont difficilement conciliables avec les flux profonds et les seuils de rupture preconises
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Tasca, Arianna <1988>. "IL FILONE POLIZIESCO. CARLOTTO ED ERVAS." Master's Degree Thesis, Università Ca' Foscari Venezia, 2014. http://hdl.handle.net/10579/4045.
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Marlard, Sylvain. "Différenciation de filets de poisson frais de filets congelés/décongelés sur le modèle du bar (Dicentrarchus labrax)." Thesis, Littoral, 2013. http://www.theses.fr/2013DUNK0411.
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En alimentation humaine, le poisson représente non seulement une source importante de protéines mais il apporte aussi des acides gras essentiels et des minéraux. Actuellement, en France, il est majoritairement consommé sous forme fraîche et préparé en filets sans peau. Cependant, face à la diminution des captures, à l'augmentation de la demande et à l'évolution des modes de consommation, l'importation de produits de la mer est de plus en plus importante dans notre pays. Or, depuis quelques années, les importateurs suspectent des fraudes consistant à vendre des filets de poisson décongelés sous la dénomination "frais". Ces produits entrent ainsi en concurrence directe avec les produits de la pêche française. L'objectif de la thèse consiste à mettre au point et à optimiser des méthodes de différenciation des filets de poisson frais de filets décongelés. La technique de l'électrophorèse bidimensionnelle comparative couplée à la spectrométrie de masse nous a permis d'identifier la parvalbumine comme marqueur de différenciation frais/décongelé à partir des exsudats de filets de bar (Dicentrarchus labrax). Nous avons utilisé la composition des exsudats comme source potentielle d'autres indicateurs pour différencier les filets frais des filets décongelés. Nous nous sommes ainsi intéressés à différents paramètres tels que l'activité de l'α-glucosidase lysosomique (marqueur historique), le dosage du calcium libre et le dosage des nucléotides et de leurs dérivés, des protéines et des parvalbumines. Nous avons procédé à une analyse statistique par Classification Hiérarchique Ascendante (CHA) et nous avons ainsi mis en évidence trois groupes dissimilaires : les indicateurs de lyse cellulaire, les indicateurs d'altération des nucléotides et les indicateurs d'altération des protéines. Nous disposons ainsi d'outils de différenciation frais/décongelé complémentaires, rapides et peu onéreux susceptibles de répondre aux attentes des industriels de la filièreInhuman diet, seafood is an important source of proteins, essential fatty acids and minerals. Nowadays, in France, fresh fish is mainly consumed as skinless fillets. Due to the decrease of the fishing and the increase and evolution of fish consumption, the importation of fish becomes more significant in our country. Since several years, the importers suspect fraudulent pratices consisting in selling thawed fish fillets labeled as fresh ones. These products are directly in competition with the national fish market. The main aim of this thesis consisted in developing and improving methods to differentiate fresh versus frozen/thawed fish fillets. A comparative two-dimensional electrophoresis and tandem mass spectrometry proteins identification strategy, performed on fish fillet exudates of European sea bass (Dicentrarchus labrax) allowed us to identify parvalbumin as a protein marker for differentiation. Further analysis of exudates composition could be a good way to find other indicators. The lysosomal alpha-glucosodase activity is already used to differentiate fresh versus frozen/thawed fillets. Two new indicators were studied : concentration of the nucleotides and their derivatives and free calcium concentration. The total protein and the parvalbumin concentrations were also measured. An Ascendant Hierarchical Clustering (AHC) was done to aggregate the variables into three dissimular clusters : the cellular lysis indicators, the proteins damages indicators and the nucleotides alteration
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Šotner, Roman. "Vícefunkční přeladitelný aktivní filtr." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2008. http://www.nusl.cz/ntk/nusl-217657.
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The diploma thesis deals about design of the ARC multifunctional filters using modern functional blocks. These active blocks are for example voltage feedback operational amplifiers (OAs), operational transconductance amplifiers (OTAs), current conveyors (CCIIs) or current mode analog multipliers, current feedback amplifiers (CFAs), integrated circuits with switched capacitors building blocks (SCs) and digital potentiometers. The filters are studied with ideal circuit models and models of third level (3) based on voltage controlled voltage sources, voltage controlled current sources etc. (analog behavioral modelling). The professional macromodels are used for example LT 1364 (Linear Technology), EL 2045 (Intersil), LT 1228 (Linear Technology), LM 13700 (National Semiconductor), EL 2082 (Intersil), AD 844 (Analog Devices) and others. The circuits of the designed filters are simulated in PSpice (OrCAD), parasite effects and effects of the real parts are studied. Tuning and electronic adjusting parameters these filters are discussed and controlled by simulation in PSpice. Properties some simulated circuits are compare with experimental results. In conclusion individual filters are discussed and compared their properties. The constructional details of the some filters are presented at the end of this work.
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Ficici, Ferhan. "Three Dimensional Fracture Analysis Of Fillet Welds." Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/3/12608351/index.pdf.
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The aim of this study is to model three dimensional surface crack problems in fillet welds. It is assumed that weld material has the same material properties with the sheet metals. The surface crack is considered to occur at two regionsone at the weld root and the other at the weld toe. The surface crack is assumed to have a semi &ndash
elliptical crack front profile. The surface crack problem is analyzed under mechanical loading and the models are built up by three dimensional finite elements. Around the crack front, strain singularity is taken into account by using degenerated 20 &ndash
node quarter &ndash
point solid elements. The main results of this work are the stress intensity factors around the crack front for the test specimen model subjected to axial and bending loads.
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Sampos, Athanasios G. "Fracture of fillet welds under extreme loading." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/40240.
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Thesis (Nav. E.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1996, and Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Materials Sciences and Engineering, 1996.Includes bibliographical references (leaves 114-120).
by Athanasios G. Sampos.
M.S.
Nav.E.
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Nascimento, Amanda Florentina do. "Modulação imunológica da relação mãe e filhote." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/10/10133/tde-29102013-151724/.
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O comportamento maternal (CM) em mamíferos tem características específicas. O período logo após o parto é particularmente sensível a alterações fisiológicas que podem modular a expressão deste comportamento importante. Mudanças comportamentais observadas em animais doentes são consideradas comportamento doentio (CD). A exposição ao LPS, uma endotoxina derivada da parede de uma bactéria gran negativa, durante a gravidez pode causar doenças mentais. A fim de investigar, uma possível relação entre CM e CD, os animais foram tratados com LPS. Para o estudo do CM e agressivo, quarenta ratas foram divididos em quatro grupos, dois controles e dois grupos experimentais, com dez animais cada. O grupo experimental recebeu 100µg/kg de LPS por via i.p, e grupo controle o veículo de endotoxina, após quarenta e oito horas de administração de LPS, ou seja, no quinto dia de lactação, as observações começaram. Para escolha deste dia, ratas virgens e ratas lactantes foram divididas em quatro grupos, dois controles e dois experimentais, com dez fêmeas cada. O peso corporal, consumo de água, ração, e a temperatura corporal foram medidas para cento e vinte horas. As fêmeas do grupo controle foram observadas da mesma forma, mas foram tratados com o veículo do LPS. Observamos que: 1) Em ratas virgens e lactantes o tratamento com LPS modificou a temperatura e peso corporal, consumo de água e ração; 2) No período de lactação houve redução da latência para busca do primeiro filhote. Na prole verificou-se que: 3) Houve alteração no padrão de vocalização dos filhotes cujas mães foram expostas ao LPS no terceiro dia de lactação; 4) houve alteração no burst e fagocitose de enutrofilos no vigésimo primeiro dia de lactação após desafio com a endotoxina indicativo de maior resposta ao LPS. Concluiu-se que a exposição de ratos ao LPS facilita o comportamento maternal, mas promove alterações na sua prole relacionadas à interação entre mãe-filhote e aumento na resposta a um desafio imunológico.Maternal behavior (MB) in mammals has specific characteristics. The time period just after parturition is particularly sensitive to physiological changes that can modulate the expression of this important behavior. Behavioral changes observed in sick animals, are considered as sick behavior (SB). Exposure to LPS, an endotoxin derived from the wall of a gran negative bacteria, during pregnancy might cause mental diseases. In order to investigate, a possible relationship between MB and SB, animals were treated with LPS. For the study of MB and maternal aggressive behavior, 40 rats were divided in 4 groups, 2 control and 2 experimental groups. The experimental group received 100µg/kg LPS by ip, and control group the vehicle of endotoxin, after 48 hours of LPS administration the observations of SB began. For choice these days, 20 virgin and 20 lactating rats were divided in 4 groups, 2 control and 2 experimental. They received ip 100µg/kg. Body weight, water and feed consumption, and body temperature were measured for 120h. Control females were observed in the same way, but they were treated with vehicle of LPS. The results showed that: 1) In 48 hours after the LPS treatment, virgin and lactating rats showed increased body temperature, loss of body weight, increased water consumption and decreased food consumption, 2) In 48 hours after the treatment with LPS, lactating rats showed reduced latency to retrieve the first pup to the nest. In the offspring of mothers treated with LPS it was found that: 3) Pups form mothers treated with LPS on the 5th day of lactation showed changes in the vocalization pattern; 4) Those pups showed changes in oxidative burst and phagocytosis on 21th day of lactation. It is concluded that exposure of rats to LPS promoted changes in the in the interaction between mother and pups.
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Couvreur, Stéphanie. "Instabilités de filets liquides sur plan incliné." Paris 7, 2013. http://www.theses.fr/2013PA077061.
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Que ce soit pour refroidir ou nettoyer un solide, la même technique est utilisée : du liquide, le plus souvent de l'eau, est mis en écoulement sur ce substrat. Il se forme alors des filets liquides. Il est donc fondamental de comprendre la dynamique et le comportement de ces filets sur des plans inclinés. Pour cette raison, nous avons étudié les filets liquides sur deux types de substrat. D'un côté, nous nous sommes intéressés aux substrats superhydrophobes, avec lesquels les liquides n'ont qu'une très petite surface de contact. Nous avons étudié la friction sur ces substrats ainsi que l'instabilité de Rayleigh-Plateau : la forme de filet liquide est instable et le filet se brise en gouttes. De l'autre côté, nous avons considéré des surfaces en mouillage partiel où la friction avec le liquide est très grande ; elles sont caractérisées par une forte hystérésis de mouillage qui induit une force d'accrochage sur le substrat. Sur ce type de surfaces, se développe une instabilité inertielle sinueuse appelée instabilité de méandrage. Nous avons cherché à comprendre les mécanismes de cette instabilité et notamment sa sensibilité au bruit des conditions initiales. Cela nous a enfin mené à étudier la réponse de filets liquides à des forces extérieuresIn order to clean or cool a solid surface, one generally flows liquid (mostly water) on the surface; the liquid does not generally flow as a homogeneous sheet, but instead forms liquid rivulets. It is important to understand the dynamics and the behavior of these liquid rivulets on inclined solid surfaces. For this reason, we studied rivulets on two different substrates. First, we used superhydrophobic substrates, where rivulets have a very low contact surface. We are interested in the friction on these substrates and in the rivulet stability: the cylindrical shape is unstable (Rayleigh-Plateau instability) and the rivulet breaks up into droplets. In a second part, we used partially wetting substrates with a strong contact angle hysteresis and large friction between the liquid and the substrate. On these surfaces, a sinuous instability called meandering instability develops. We studied the instability mechanisms in detail and demonstrate the role of the initial conditions on the critical flow rate at which meandering appears. We also investigated the effect of external forces on the shapes of the rivulets
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Azzara', Silvia. "Studi sulla tradizione papiracea di Filone Alessandrino." Doctoral thesis, Scuola Normale Superiore, 2008. http://hdl.handle.net/11384/86177.
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Santorelli, Ottavia <1989>. "Studio di filati sintetici contenenti fibra acrilica: caratterizzazione e test di invecchiamento di filati Dralon® e Leacril®." Master's Degree Thesis, Università Ca' Foscari Venezia, 2017. http://hdl.handle.net/10579/10045.
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In questo lavoro di tesi sono stati studiati dei filati sintetici commerciali denominati Dralon® e Leacril®. Si tratta di filati contenenti fibra acrilica (prodotti dalla Bayer e dalla Montefibre a partire dal 1954 e dal 1972, rispettivamente) e provenienti da due cataloghi della filatura Smeraldo per le collezioni dell’anno 1985-86. Si tratta di filati di largo impiego nell’arte contemporanea e nel design ma ancora poco studiati. I filati sono stati caratterizzati mediante diverse tecniche diagnostiche. Per indagare la struttura interna della fibra si sono utilizzate la spettroscopia infrarossa in riflettanza totale attenuata (FTIR-ATR) e la pirolisi accoppiata alla gas cromatografia-spettrometria di massa mentre per la misura del peso molecolare medio si è utilizzato un viscosimetro a capillare. L’analisi dinamico meccanica (DMA) poi è stata impiegata per studiare il comportamento viscoelastico delle fibre. I filati inoltre sono stati sottoposti a tre tipi di invecchiamento accelerato (alta temperatura, ambiente ad umidità elevata e trattamento solare artificiale) per studiarne il comportamento e la stabilità nel tempo. Per il monitoraggio dei trattamenti e per la caratterizzazione dei filati si è utilizzata la microscopia ottica (microscopio a luce riflessa e microscopio polarizzatore a luce trasmessa) ed elettronica (SEM-EDX) per lo studio delle caratteristiche ottiche e morfologiche. Infine per monitorare le variazioni di colore durante i trattamenti si è impiegata la spettroscopia di riflettanza nel visibile unitamente all’analisi colorimetrica.
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Tichý, Jakub. "Filtr s akustickou povrchovou vlnou." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2010. http://www.nusl.cz/ntk/nusl-218598.
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The theoretical part of this thesis deals with principles and characteristics of the surface acoustic wave filter. It explained the principle of magnetostriction and piezoelectric effect, which uses a filter. In the practical part in the program Comsol Multiphysics are made three simple models of SAW filter. Some modes are founded and are compared to previously known results. In the next phase of project is further studied using the parametric analysis. In the last phase of project is applied global optimization PSO at admittance characteristic from simple 2D structure. The results are compared with the commercially produced devices.
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Sedláčková, Eva. "Vlnkový wienerovský filtr EKG signálů." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2014. http://www.nusl.cz/ntk/nusl-220843.
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The aim of this work is introduction with method of filtering the ECG signals using wavelet transformation and use of this method for filtering of signal disturbed with myopotencials. The work deals with general properties and with genesis of ECG signals and describes ECG curve. Next part of work is focused on wavelet transformation, types of wavelet transformation and different methods calculation thresholds and thresholding. Design part of work is focused on design Wiener filter for remove myopotencials from ECG signals and finding optimal parameters of this filter using optimization algorithm. For optimization is used simplex method. Discovered optimal parameters are assessed on CSE and MIT-BIH Arrhythmia database and compared with results of other authors.
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Janů, Joshua. "Vlnkový wienerovský filtr EKG signálů." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2014. http://www.nusl.cz/ntk/nusl-220872.
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The thesis focuses on the use of wavelet wiener filtration to remove muscular interference from ECG signals. As part of it, a filter has been implemented in the MATLAB programming environment. The main part of the thesis deals with the optimization of numerical parameters of the proposed filter. The results of the filtration are compared with the results reported by other authors.
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La, Porta Neto Dante Gageiro. "Avaliação das distorções angulares em juntas de filete." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2017. http://hdl.handle.net/10183/164589.
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Distorções geométricas em partes metálicas unidas através de soldagem a arco elétrico são consequências inerentes ao processo devido ao elevado fluxo de calor necessário para fusão dos metais de base e adição (quando houver). Embora inevitáveis, estas distorções podem ser reduzidas ou eliminadas através do prévio conhecimento do comportamento da junta de acordo com energia aplicada, características geométricas, propriedades do material, entre outros fatores, possibilitando assim a redução de custos com possíveis retrabalhos por meio de alterações de projeto ou ações que as previnam durante a soldagem. Este trabalho utilizou a metodologia de Projeto de Experimentos para avaliar o efeito da energia de soldagem, espessura da aba e espessura da alma na distorção angular em juntas de filete soldadas pelo processo MIG/MAG com modo de transferência curto-circuito. Foi aplicada a Análise de Variância para as distorções angulares das amostras e identificou como significativo o efeito linear da energia de soldagem, o efeito quadrático da espessura da aba e a interação dos fatores energia de soldagem e espessura da aba na distorção angular de juntas de filete. Observou-se mínimas distorções para a combinação de maior energia de soldagem e menor espessura de aba, sendo mínimas também as distorções angulares para a combinação de menor energia de soldagem e maior espessura de aba, independente da espessura da alma para as condições estudadas. Através das macrografias das amostras, identificou-se que razão entre a área total do metal de solda e espessura da aba que gera maior distorção angular é aproximamente 5, com menores distorções angulares para valores inferiores e superiores a esse. Através de um modelo numérico, demonstrou-se que o gradiente de temperatura na aba da junta não determina a máxima distorção angular, e sim a máxima temperatura atingida na superfície inferior da aba, com máxima distorção angular obtida para a amostra que atingiu aproximadamente 425 ºC em ponto na superfície inferior da aba e paralelo à margem do cordão. Por fim, para distorções angulares em função da razão entre a energia de soldagem conduzida pela aba e espessura de aba ao quadrado, observou-se que a distorção angular é crescente até atingir 15,00 J/mm³, e menores distorções angulares para relações superiores a esse valor.Welding deformation on metallic parts joined by electric arc welding are inherent consequences of the process due to the high heat flux required for melting the base and filler metals (when used). Although unavoidable, these deformations can be reduced or eliminated through prior knowledge of joint behavior in accordance with applied heat input (welding energy), geometric characteristics, material properties, among other factors, thus reducing costs with possible rework through design changes or actions that prevent them during welding. This work uses a methodology proposed by Experimental Design theories to evaluate the effect of heat input, flange thickness and web thickness on angular distortion in fillet joints welded by the GMAW process with short-circuit transfer mode. Was applied Analysis of Variance for the angular distortions of the test specimens and there are significant the linear effect of heat input, the quadratic effect of flange thickness and the interaction of heat input and flange thickness on the angular distortion of fillet joints, observing minimum distortion for the combination of higher heat input and lower flange thickness, and also angular distortions for the combination of lower heat input and higher flange thickness, regardless of the thickness of the web are minimal. Through the macrographs of the samples, it was identified that the ratio of a region of the weld metal to the flange thickness that generates the greatest angular distortion is approximately 5, with smaller angular distortions for lower values and higher than that. Through a numerical model, it has been shown that the temperature gradient in the flange does not determine the maximum angular distortion, but the maximum temperature reached in the lower surface of the flange, with maximum angular distortion obtained for the sample that reached approximately 425ºC in point on the surface bottom of the flange and parallel to the edge of the weld bead. Finally, for angular distortions as a function of the ratio between the heat input conducted by the flange and the squared flange thickness, it was observed that the angular distortion is increasing until reaching 15,00 J/mm³, and smaller angular distortions for higher relations to this value.
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Saudelli, Lucia. "Eraclito e la testimonianza di Filone di Allesandria." Università degli studi di Urbino Carlo Bo (Urbino, Italie), 2008. http://www.theses.fr/2008EPHE5008.
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Cette recherche est l’étude du témoignage fourni sur Héraclite d’Éphèse (vers 520 – vers 460 av. J. -C. ) par Philon d’Alexandrie (15 av. J. -C. – 50 ap. J. -C. Environ), le représentant majeur du judaïsme hellénistique, qui interprète la « parole de Moïse » de la Septante, la Bible grecque, à travers le platonisme d’époque impériale ou médioplatonisme. Les textes de Philon sur Héraclite et sur la doctrine héraclitéenne sont analysés et confrontés avec ceux de testimonia antérieurs et surtout postérieurs de l’Antiquité tardive, puis utilisés afin d’approcher de façon plus précise la signification de la pensée d’Héraclite. La recherche se structure en deux parties, qui correspondent aux unités thématiques dans lesquelles sont regroupées les références de Philon à Héraclite. La Partie I est consacrée à la physis, c’est-à-dire au concept héraclitéen de nature sous tous ses aspects, alors que la Partie II est consacrée à la psychê, c’est-à-dire à la nature de l’âme humaine. La Partie I sur la physis se divise en trois sections. La première concerne la nature qui aime à se cacher, à savoir le fragment 123 DK d’Héraclite ; la deuxième section concerne les contraires, à savoir la conception héraclitéenne de l’unité et de la distinction de la réalité en couples d’opposés ; la troisième et dernière section concerne la relation entre dieu et le cosmos, à savoir les fragments 10, 50, 65 et 90 DK d’Héraclite dans les deux passages où ils reviennent. La Partie II sur la psychê se compose de deux sections. La première concerne le cycle cosmo-biologique de vie et mort de l’âme, à savoir les fragments 36, 60 et 62 d’Héraclite ; la seconde section concerne le cycle auquel est soumis l’être humain, à savoir les fragments 96 et 118 DK, ainsi que le témoignage 19 DK. Les conclusions générales synthétisent enfin les conclusions partielles, en déterminant et en précisant les concepts particuliers et les aspects généraux de la pensée d’Héraclite qui ont été mis en lumière par PhilonThis research is a study of the testimony of Heraclitus of Ephesus (ca. 520 B. C. – 460 B. C. ) by Philo of Alexandria (ca. 15 B. C. – 50 A. D. ), the major representative of Hellenistic Judaism, who interprets the « word of Moses » of the Septuagint, the Greek Bible, through the Platonism of the Imperial Period or Middle Platonism. Philo’s passages on Heraclitus and Heraclitean doctrine are analyzed and compared with anterior and especially posterior testimonia of Late Antiquity, and then used to approach more specifically the significance of Heraclitus’ thinking. This study is structured into two parts which correspond to the thematic units which group the references of Philo to Heraclitus. Part I is concerned with the physis , i. E. The Heraclitean concept covering all the aspects of nature as a whole while Part II deals with the psyché, i. E. The nature of the human soul. Part I on the physis is divided into three sections. The first section treats the liking for nature to hide itself, i. E. The 123 DK Heraclitean fragment; the second section treats the contraries, i. E. The Heraclitean concept of the unity and distinction of reality in opposing couples; the third and last section treats the relation between God and the cosmos, i. E. Heraclitus’ fragments 10, 50, 65 and 90 DK in the two passages where they recur. Part II on the psyché is divided into two sections. The first section deals with the cosmo-biological cycle of the life and death of the soul, i. E. Heraclitus’ fragments 30, 60 and 62 DK; the second section deals with the cycle of the human being, i. E. Heraclitus’ fragments 96 and 118 DK as well as the testimony 19 DK. The general conclusions present a synthesis of the partial conclusions by insisting on the particular concepts as well as on general aspects of Heraclitean thinking which have been brought to light by Philo
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Dvořák, Martin. "Anticurtaining - obrazový filtr pro elektronovou mikroskopii." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2021. http://www.nusl.cz/ntk/nusl-445537.
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Tomographic analysis produces 3D images of examined material in nanoscale by focus ion beam (FIB). This thesis presents new approach to elimination of the curtain effect by machine learning method. Convolution neuron network is proposed for elimination of damaged imagine by the supervised learning technique. Designed network deals with features of damaged image, which are caused by wavelet transformation. The outcome is visually clear image. This thesis also designs creation of synthetic data set for training the neuron network which are created by simulating physical process of the creation of the real image. The simulation is made of creation of examined material by milling which is done by FIB and by process displaying of the surface by electron microscope (SEM). This newly created approach works precisely with real images. The qualitative evaluation of results is done by amateurs and experts of this problematic. It is done by anonymously comparing this solution to another method of eliminating curtaining effect. Solution presents new and promising approach to elimination of curtaining effect and contributes to a better procedure of dealing with images which are created during material analysis.
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Ševčík, Břetislav. "Elektronicky řiditelný aktivní filtr 2. řádu." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2009. http://www.nusl.cz/ntk/nusl-217790.
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The diploma thesis deals with the modern design of the control circuits for digital potentiometers and their application in analog systems. The concept of the digital control is demonstrated on the electronically controlled active 2-nd order filter and programmable oscillator. The proposed design of the active filter describes a programmable active 2-nd order filter Sallen-Key. In this circuit it is possible independently programme cut-off frequency, Q factor and type of approximation with very good accuracy. The circuits of the designed filter and designed oscillator are simulated in PSpice (OrCAD), parasite effects and effects of the real parts are studied. Properties simulated circuits are compare with experimental results. These results appreciate quality and efficiency of the digitally controlled potentiometers in dependence on variable input circuit parameters. Integral part of this project is author’s universal control program called Digipot and comunications interface for many types of digital potentiometers with I2C, SPI or Up/Down interface. It is possible to use this device for many applications. The constructional details of the filter are presented at the end of this work. The software equipment is availability on enclosed CD.
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Fillot, Nicolas Berthier Yves. "Etude mécanique de l'usure Modélisation par Eléments Discrets des débits de troisième corps solide /." Villeurbanne : Doc'INSA, 2005. http://docinsa.insa-lyon.fr/these/pont.php?id=fillot.
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Ribeiro, Alcidio Pinheiro. "Avaliação do emprego de filito como carga em plastisol." Universidade de São Paulo, 2003. http://www.teses.usp.br/teses/disponiveis/3/3134/tde-15092011-111453/.
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Apresenta-se aqui a caracterização do filito e a avaliação da sua aplicação como carga mineral na produção de materiais plásticos. Amostras de jazidas em lavra no município de Itapeva, sudoeste do Estado de São Paulo, foram preparadas em laboratório, através de secagem e peneiramento, e analisadas física e quimicamente, sendo comparadas com outros minérios utilizados comumente como cargas minerais. Uma dessas amostras, após sua preparação, foi aplicada como carga na produção de peças plásticas no Centro Técnico de Serviços CTS da empresa Braskem S.A., a partir de pastas formadas com PVC e plastificantes, conhecidas como plastisóis. O filito foi incorporado em varias formulações de compostos utilizados para produção de bolas plásticas comuns. Os resultados, em termos de resistência mecânica, foram comparados com os de compostos contendo carbonato de cálcio natural, moído, em malha inferior a 44 m. O carbonato de cálcio natural, ou calcita, constitui a carga mais tradicionalmente utilizada nesse setor industrial. Os testes realizados indicaram que o filito confere ao material polimérico produzido, composto de polímeros, aditivos e cargas, propriedades desejáveis de resistência mecânica e acabamento, algumas propriedades resultando melhores que as obtidas com o uso da calcita para determinadas proporções e formulações. Os resultados obtidos permitem concluir que o filito beneficiado comporta-se similarmente a minerais industriais tradicionais e pode vir a ser empregado na indústria de plásticos dito reforçados na geração de produtos diversos tais como bolas de parque, cabeças de bonecas, tapetes, tubos plásticos flexíveis e painéis de veículos, entre outros segmentos do setor.This paper presents the characterization of the White-phyllite and an evaluation of its application as filler in the production of plastic materials. Phyllite samples with origin in ore body located in the district of Itapeva, southwest area of Sao Paulo State, they were beneficiated, prepared in laboratory through granulometric separation and drying and applied in the production of reinforced thermoplastic (Plastisol) in laboratories of the Braskem S. A. located in São Paulo city. The accomplished tests indicated that the beneficiated phyllite checks to the material plastic produced desirable properties of mechanical resistance and finish. The use of the phyllite it was compared with the calcite in the production of the plastics materials in several composition and proportions, showing in some compositions strips better than obtained results them with the calcite, traditional filler used for those products. The obtained results allow to conclude that the phyllite, properly beneficiated, is similar to traditional industrial minerals and it can benefit the industry of plastics reinforced in the production, among others, of balls, doll heads, rubber rugs, flexible plastic tubes, panels of vehicles.
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BERTOCCHI, Giorgio. "Modellazione e criteri di sintesi di alimentatori di filato." Doctoral thesis, Università degli studi di Bergamo, 2011. http://hdl.handle.net/10446/873.
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Pallone, Alessandra <1993>. "Bottled water market in China: the Acqua Filette experience." Master's Degree Thesis, Università Ca' Foscari Venezia, 2018. http://hdl.handle.net/10579/13898.
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This Master Thesis' subject is water, considered all over the world as one of the life's basic requirements, that from a simple natural element becomes, in the form of bottled water, a commercial product on the international market.
The thesis summarizes the results of the analysis conducted on the methods of use, management and control of mineral waters for human consumption, arriving then to what is the world of bottled water, starting from the birth of the product and its industry, passing through the affirmation of a constantly growing market. The aim is to underline how, what we simply call "water" is instead a synonym for business and status symbol, particularly in the Asia-Pacific Region's countries.
Through market surveys we know that, in the recent years, China has been one of the first countries in the world in the consumption of bottled water. Today, in fact, what we could only consider as a daily routine gesture - to buy and drink bottled water - is not only a need that comes from a special attention for a healthy body, but also means, especially for the Chinese population, to make a buying experience of a particular brand, to follow a social trend.
In this context, the focus of this work is to analyze the Chinese bottled water market, considering national and foreign brands. In particular, we see how an Italian bottling company, Acqua Filette s.r.l., has decided to enter the Chinese market, which are the distribution channels used by the company, its strategies and market sales.
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Arias, Valdivia Francisco Fernando, and Mispireta Jorge Luis Huapaya. "Requisitos técnicos del Organismo Nacional de Sanidad Pesquera - SANIPES que dificultan la importación y comercialización del filete de tilapia congelado proveniente de un nuevo productor chino en función de la experiencia de la empresa Umi Foods S.A.C. durante los años 2017 - 2018." Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2019. http://hdl.handle.net/10757/626294.
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El presente trabajo de investigación busca describir las dificultades que ha ocasionado el protocolo técnico de registro sanitario de importación de productos pesqueros y acuícolas congelados impuesto por la autoridad sanitaria competente del Perú respecto a la importación y comercialización del filete de tilapia congelado proveniente de un nuevo productor chino a partir de la experiencia de la empresa Umi Foods S.A.C., por lo tanto nuestro estudio se divide en cuatro (4) capítulos, los cuales son detallados a continuación.
El primer capítulo se centra en el plan de investigación, por medio del cual planteamos la pregunta, el problema y los objetivos, tanto principales como específicos y la formulación de la hipótesis inicial de la investigación. El segundo capítulo da a conocer los antecedentes de la investigación, tanto nacionales como internacionales y el marco teórico del estudio, así como las restricciones para la importación y los requisitos para la comercialización del filete de tilapia congelado. El tercer capítulo se centra en la metodología de la investigación, donde detallamos el tipo, propósito, categorías, delimitación, diseño y tamaño de muestra de la investigación. Asimismo, en este capítulo desarrollamos las entrevistas de profundidad, las cuales serán de utilidad para el recojo de información.
Finalmente, el cuarto capítulo se enfoca en el respectivo análisis y discusión de resultados de nuestra investigación para así encontrar los hallazgos y realizar tanto las conclusiones como las recomendaciones finales por medio del análisis de documentos y de la información obtenida mediante las entrevistas de profundidad desarrolladas en nuestro estudio.The present research seeks to describe the difficulties caused by the technical protocol of import sanitary registration for frozen fishery and aquiculture products from the sanitary authority of Peru regarding the import and commercialization of frozen tilapia fillet that comes from a new Chinese producer and according to the experience of the company Umi Foods S.A.C., therefore our study is divided into four chapters that are detailed as below. The first chapter focuses on the planning research, which is about proposing the research question, the main and specific problems and objectives. In this chapter we also make known about the starting hypothesis of our working research. In the second chapter we present the national and international backgrounds and the theory framework of the research as well as the import restrictions and the commercialization requirements of the frozen tilapia fillet. The third chapter explains the methodology research, which we detail the type, purpose, categories, delimitation, design and sampling size of the research. Also, in this chapter we develop depth interviews that will be very useful for the research’s collecting information. Finally, the fourth chapter is about the respective analysis and discussion of the research´s results in order to get the findings of the study and make the final conclusions and recommendations according to the documents’ analysis and to the obtained information from held depth interviews in our research.
Tesis
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Vyskočil, Jiří. "Filtr na bázi vlnovodu integrovaného do substrátu." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-218850.
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In this thesis is discussed a filter design of a band-pass substrate integrated waveguide filter on the frequency of 5 GHz. It also includes design theory, filter synthesis, filter analysis in the program CST Microwave Studio® and the results of measurement on a vector network analyzer. The analysis results are compared with the measured results. Good agreement between simulated and measured results is observed.
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Vlček, Pavel. "Lineární aktivní filtr napájecího napětí „Ripple Blocker“." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2015. http://www.nusl.cz/ntk/nusl-221086.
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This work deals with a methods for increasing the PSRR of the linear active filters of supply voltage or if linear regulators and voltage range of supply, primarily his minimal value. In the work are used ideal parts of reference voltage source and reference current source. The work describes how to eliminate effect of feedback loop on the PSRR, how to decrrease minimal power supply voltage and how to set stability of total schematic.
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Arminio, Liliana. "Sopravvivenza di Clostridium Sporogenes in filetti di baccalà trattati termicamente." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2018. http://amslaurea.unibo.it/15985/.
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I prodotti trasformati del merluzzo sono molto diffusi grazie alla loro conservabilità, dovuta ai processi di salagione ed essicamento cui vengono sottoposti, che riducono la proliferazione microbica. Tuttavia essi necessitano di una lunga fase di reidratazione prima dell’uso, e per questo l’industria ha interesse nel mettere a punto prodotti reidratati e precotto che ne faciliti l’utilizzo. A questo scopo è fondamentale, ai fini della sicurezza e shel-life del prodotto, definire il trattamento termico da adottare. In questo lavoro si è validato il processo di pastorizzazione mediante challenge test, ossia inoculando su filetti di baccalà un ceppo di Clostridium sporogenes (utilizzato come surrogato di Clostridium botulinum) per valutarne il comportamento durante il trattamento e la successiva conservazione a 4°C. I risultati hanno evidenziato la presenza cariche cellulari variabili, sia per il trattamento “breve”, sia per il trattamento “lungo”. In particolare, i dati hanno mostrato che i trattamenti applicati non sembrano in grado di garantire una sicurezza commerciale al prodotto poiché, già dopo 30 giorni di conservazione, 5 campioni su 12 presentavano evidenti alterazioni organolettiche. Il carico cellulare di C. sporogenes sembra essersi ridotto immediatamente dopo il trattamento termico, ma in alcuni campioni i clostridi sono presenti ad una concentrazione di 3-4 log UFC/g dopo 30 giorni. Questo può essere dovuto al fatto che una parte delle spore sopravvissute al trattamento sia germinata durante la fase di conservazione. Oltre al microrganismo target, è stata riscontata anche la presenza di altri microrganismi responsabili dell’alterazione del prodotto, in particolare batteri ascrivibili al genere Bacillus che sono in grado di sviluppare anche in assenza di ossigeno. Tutto ciò può essere dovuto ad una disomogeneità di trattamento all’interno della camera di pastorizzazione, per cui sarà necessario effettuare ulteriori studi per verificarne l’efficacia.
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Boulware, Paul C. "A methodology for the robust procedure development of fillet welds." Connect to resource, 2006. http://hdl.handle.net/1811/6453.
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Thesis (Honors)--Ohio State University, 2006.Title from first page of PDF file. Document formatted into pages: contains v, 35 p.; also includes graphics. Includes bibliographical references (p. 35). Available online via Ohio State University's Knowledge Bank.
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Portofée, Clemens. "Untersuchungen zur Gewinnung von Viktoriabarsch (Lates niloticus) - Filets in Uganda /." Hannover : [s.n.], 2000. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=009435974&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.
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Olivieri, Orlando Sebastien. "Studio petrografico e geochimico dei filoni granitoidi in alta Val Codera." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2018. http://amslaurea.unibo.it/16495/.
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L’obiettivo dello studio è quello di caratterizzare i filoni granitoidi affioranti in alta Val Codera, definiti in letteratura come “micrograniti”, dal punto di vista petrografico e geochimico. Inoltre si intende stabilire i rapporti di intersezione tra i filoni granitoidi e i filoni pegmatitici ed aplitici che caratterizzano l’area e confrontare i dati ottenuti con quelli riguardanti il granito di S. Fedelino, descritto in letteratura come lo stock magmatico che ha generato i filoni granitoidi dell’alta Val Codera.
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Nascimento, Amanda Florentina do. "Influência do LPS e do zinco na interação mãe e filhote." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/10/10133/tde-04052016-152636/.
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O comportamento materno consiste em um conjunto de mudanças comportamentais e fisiológicas, exercidas pelos indivíduos adultos em torno dos indivíduos reprodutivamente imaturos, garantindo sua sobrevivência e a propagação de sua espécie. A interação mãe e filhote é tida tipicamente como simbiótica. Os filhotes quando separados da mãe sinalizam para serem recolhidos através de dicas olfativas, visuais e da vocalização que representa uma forma de comunicação filhote e mãe. O modelo de febre clássico e amplamente empregado envolve a utilização do lipopolissacarídeo (LPS), principal componente da parede celular de bactérias Gram-Negativas. Além da febre, as infecções apresentam uma cadeia de respostas não especificas do hospedeiro que se sabe estarem envolvidos em muitas das funções vitais, incluindo a resposta imune estas incluem a hipozinquemia. Sendo assim, fêmeas virgens, gestantes e lactantes receberam LPS (100 µg/kg, i.p.) e foram tratadas com zinco (2 mg/kg, s.c.) O peso corporal, consumo de água, ração, e a temperatura corporal foram medidas por noventa e seis horas, duas horas após a administração do LPS. No quinto dia de lactação foram observados o comportamento maternal, a atividade geral em campo aberto e a vocalização ultrassônica nos filhotes. No dia do desmame os filhotes dessas fêmeas receberam um desafio com LPS (50 µg/kg, i.p.) e duas horas após a administração, foram observados a atividade geral em campo aberto, e o burst e fagocitose de neutrófilos. Observamos que: 1) Em ratas virgens, gestantes e lactantes, a exposição ao LPS e o tratamento com zinco modificou de forma específica a temperatura e peso corporal, consumo de água e ração e a atividade geral observadas em campo aberto; 2) No período de lactação, houve redução da latência para busca do primeiro filhote. Na prole das fêmeas lactantes verificou-se que: 3) Houve alteração no padrão de vocalização dos filhotes; 4) houve alteração na atividade geral observada em campo aberto e no burst e fagocitose de neutrófilos no vigésimo primeiro dia pós natal, após um desafio com a endotoxina, Assim, os resultados indicam que a administração de LPS e o tratamento com zinco têm seus efeitos modulados conforme o estágio fisiológico em que a fêmea se encontra, e interfere com a interação mãe/filhote, resultando em efeitos de curto e longo prazo sobre o comportamento dos filhotes. A partir deste trabalho, a possibilidade da exposição de mães à endotoxina bacteriana e da modulação de seus efeitos pelo zinco programar as respostas inflamatórias dos filhos torna-se factívelThe maternal behavior consists of a set of behavioral and physiological changes, performed by adults around the reproductively immature individuals, ensuring their survival and propagation of their species. The mother and pups’ interaction is typically seen as symbiotic. Puppies give signal to be collected when separated from their mother, through olfactory, visual and vocalization tips that represents a form of communication between mother and pup. The classic disease model is widely used involves the use of lipopolysaccharide (LPS), the major component of the cell wall of Gram-negative bacteria. In addition to fever, infections present a chain of non-specific host responses known to be involved in many vital functions, including the immune response these include hypokinemia. Therefore, virgin, pregnant and lactating female rats received LPS (100 µg/kg, ip) and were treated with zinc (2 mg/kg, sc). Temperature and Body weight, water and food consumptions were measured for ninety-six hours, two hours after LPS administration. On the fifth day of lactation were observed maternal behavior, the overall activity in the open field and ultrasonic vocalization in puppies. On the day of weaning pups of these females received a challenge with LPS (50 µg/kg, ip) two hours after administration were observed general activity in the open field and the burst and phagocytosis of leukocytes. We observed that: In virgin, pregnant and lactating, the exposure to LPS and the treatment with zinc, modified of the form differentially between these females, the temperature and body weight, water and food consumption, and the general activity observed in the open field; In the lactation period the latency to search the first pup was reduced. In the offspring, it was found that: There was a change in the pattern of vocalization of the puppies; changes in general activity observed in the open field and in burst and phagocytosis of leukocytes in the twenty-first day of lactation after challenge with endotoxin. Thus, the results indicate that administration of LPS and treatment with zinc have effects modulated according to the physiological stage when the female is, and interferes with the interaction between mother and puppies, resulting in short and long term effects on behavior their offspring. From this work, the possibility of the exposure of mothers to bacterial endotoxin modulates the effects caused by zinc, programing the inflammatory responses in their offspring, becomes feasible
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Trevisan, Daniela Mascarenhas de Queiroz. "Filhote - ferramenta de suporte à análise e interpretação de dados biológicos." Universidade Federal do Tocantins, 2015. http://hdl.handle.net/11612/684.
Full textAbstract:
Este trabalho apresenta uma proposta para a estruturação dos dados de peixes coletados
na região da Usina Hidrelétrica Luís Eduardo Magalhães (ou Usina de Lajeado),
no período de 1999 a 2012, e o desenvolvimento de uma ferramenta, chamada Filhote,
para a administração destes dados. O principal objetivo é oferecer um meio de manipulação
e armazenamento eficiente aos dados obtidos possibilitando a construção de séries
históricas com a agregação de resultados de futuras coletas. Para isto, foi desenvolvido
um modelo de dados para o armazenamento estruturado desta série, visando servir de
alicerce aos estudos de monitoramento da fauna de peixes em ambientes com e sem
reservatório. Tomando este modelo como base, a ferramenta Filhote foi integrada à
aplicação de Mineração de Dados WEKA com o intuito de prover ao pesquisador um
meio de análise de dados através da geração de regras de associação. O modelo de dados
e a ferramenta desenvolvida são viáveis para o tratamento dos dados existentes e se
apresentam como uma boa alternativa para projetos que coletam dados neste mesmo
sentido, possibilitando a expansão dos módulos de armazenamento, bem como com a
inclusão de novos algoritmos de mineração de dados.This work presents a proposal to structure the data of fishes collected in the region of hydroelectric plant Luís Eduardo Magalhães (or hydroelectric plant of Lajeado), during the 1999-2012 period and also a tool development, called Filhote, for the administration of these data. The main purpose is to provide an efficient way to manipulate and store the obtained data, enabling the construction of time series aggregating results from future collections. To this intent, it was developed a data model for the structured storage of this set, aiming to provide the basis for studies on the monitoring of fish fauna in environments with and without reservoir. Taking this model as the basis, the Filhote tool has been integrated into the application of Data Mining WEKA in order to provide the researcher a means of data analysis through the generation of association rules. The data model and the developed tool are viable to treatment of existing data and they are presented as a good alternative for projects that collect data in this same direction, enabling the expansion of the storage modules, as well as the inclusion of new data mining algorithms.
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Ferreira, Charles Francisco. "Efeitos do estresse perinatal sobre a relação mãe-filhote de ratas." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2010. http://hdl.handle.net/10183/25529.
Full textAbstract:
O comportamento maternal em ratas consiste de vários elementos integrados que estão relacionados com a nutrição e o cuidado dos filhotes. Interações na relação mãe-filhote são importantes para o crescimento e desenvolvimento adequados dos mamíferos. A interrupção de estímulos sensoriais providos pela mãe tem efeitos negativos no desenvolvimento da ninhada em muitas espécies. Em modelos animais tratamentos estressores às fêmeas prenhas ocasionam mudanças notáveis na fisiologia e no comportamento de sua ninhada, podendo causar numerosas disfunções tanto nas mães quanto em seus filhotes O presente trabalho tem por objetivo investigar os efeitos de dois tipos de eventos estressores ambientais durante o período perinatal - restrição de substrato para a construção do ninho e apresentação de um predador natural - bem como suas diferentes combinações, sobre o padrão comportamental da relação da mãe para com sua cria, em ratas wistar, bem como seu padrão de comportamento agressivo, possíveis comportamentos tipo-depressivos e o nível de ansiedade destes animais. Como resultado, observa-se no presente trabalho que, os estresses ambientais aplicados durante o período perinatal não ocasionaram alterações significativas nos comportamentos relacionados ao cuidado maternal ou ao comportamento agressivo maternal. Entretanto, observou-se um padrão diferenciado de cuidado maternal nas fêmeas submetidas aos eventos estressores estudados. Além disso, não foram observados comportamentos tipo-depressivos (medidos pelo teste agudo de nado forçado) ou aumento do nível de ansiedade (medido pelo teste de labirinto em cruz elevado) destas mães submetidas a estes paradigmas.Maternal behavior in rats consists of several integrated elements that are related to nutrition and care of the offspring. Mother-pup interactions are important for proper growth and development of mammals. The interruption of sensory stimulation provided by the mothers has negative effects on offspring’s development in many species. In animal models stressors treatment aplplied to pregnant females causes dramatic changes in their offspring’s physiology and behavior, which may cause many disorders in both mothers and pups. This study aimed to investigate the effects of two types of environmental stressors during the perinatal period - the restriction of substrate for nest building and exposure to a natural predator - as well as their different combinations on the behavioral pattern of the mother’s relationship towards their offspring in Wistar rats, as well as their pattern of aggressive behavior, possible depressive-like behavior and anxiety level. As a result it was observed in this study that the environmental stresses applied during the perinatal period did not produce significant changes in behaviors related to maternal care or maternal aggressive behavior in females subjected to the stressful events studied. However, there was a distinct pattern of maternal care in females subjected to stressful events studied. Furthermore, depressive-like behaviors (measured by acute forced swim test) or anxiety (measured by the elevated plus maze test) were not observed in these mothers subjected to these paradigms.
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Dewitz, Michael B. "The effect of a fillet on a wing/body junction flow." Thesis, Virginia Tech, 1988. http://hdl.handle.net/10919/43843.
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Jung, Gonghyun. "Plasticity-Based Distortion Analysis for Fillet Welded Thin Plate T-Joints." The Ohio State University, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=osu1047434566.
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Niro, Serena. "Innovazione di processo e di prodotto in formaggi a pasta filata." Doctoral thesis, Università degli studi del Molise, 2011. http://hdl.handle.net/11695/66330.
Full textAbstract:
In Italia nonostante la vasta gamma di prodotti caseari, i prodotti che assumono una reale importanza sul mercato sono pochi e spesso limitati a prodotti tipici o prodotti freschi. Inoltre le produzioni innovative sono spesso gestite da grandi produttori nazionali, e sono oggetto di diversi lavori di ricerca. Per tali motivi l’acquisizione di fette di mercato da parte di piccole realtà produttive quali quelle esistenti in un piccola regione come il Molise, deve necessariamente puntare su produzioni ad elevato contenuto innovativo di processo e di prodotto e sull’azione sinergica con le produzioni tradizionali.
Gli obiettivi del presente lavoro di dottorato hanno visto la realizzazione di formaggi a pasta filata a breve e media stagionatura con un’innovazione di processo e prodotto in modo da soddisfare la presente domanda del mercato, nel rispetto della tradizionalità del prodotto finito.
L’innovazione di processo ha riguardato la standardizzazione e la razionalizzazione di un impianto di asciugatura/stagionatura per prodotti lattiero caseari nel rispetto della tipicità e tradizionalità del prodotto finito. L’impianto, dotato di un sistema di deumidificazione dell’aria a basse temperature, è stato testato su prodotti a pasta filata a breve stagionatura come le scamorze passite e su prodotti a media stagionatura come i caciocavalli. L’impianto ha permesso la standardizzazione e il miglioramento della qualità dei prodotti riducendone al contempo i tempi di asciugatura. Infine ha mostrato facilità d’uso, minimo ingombro e quindi immediata applicabilità anche in piccole realtà produttive.
L’innovazione di prodotto ha invece riguardato l’ottenimento di prodotti a pasta filata a breve e media stagionatura derivanti da latte vaccino miscelato con latte ovino e caprino.
La realizzazione di prodotti caseari a pasta filata innovati nelle formulazioni se è una realtà già consolidata in Italia per i formaggi bufalini, evidenzia, per i prodotti realizzati con latte vaccino/ovino e vaccino/caprino, pochissimi casi in Europa, soprattutto in virtù della differente composizione del latte di partenza che ne condiziona la tecnologia di produzione e la resa. Essendo inoltre il solo latte vaccino vincolato alla produzione dalle quote latte, l’obiettivo di sviluppare la filiera a partire da diverse tipologie di latte potrebbe avere ricadute particolarmente positive sul territorio. I prodotti ottenuti hanno mostrato buone caratteristiche chimico-fisiche e organolettiche evidenziando inoltre caratteristiche distintive positive e peculiari che possono permettere una diversificazione di prodotto.In Italy, despite the wide range of dairy products, the products having a real importance on the market are few and often limited to the local or fresh products. In addition, innovative products are often realized by large national brewers, after different research studies. For these reasons, the acquisition of market by smaller companies such as those existing in a small region such as Molise, have to necessarily focus on highly innovative production processes and product and on synergistic action with the traditional productions. The aim of this PhD project is the realization of pasta filata cheeses at short and medium ripening, innovated both in technologies and in formulations so as to satisfy present market demands, with respect of traditionality of finished products. The process innovation focus on the standardization and rationalization of innovated ripening methods of traditional pasta filata cheeses with respect to the typical, traditional, and microbiological aspects of finished product. The drying plant used was equipped with an air dehumidification system operating a low temperature. Cheeses at short (scamorza passita) and long ripening (caciocavallo) were dried. The innovative drying led to time saving and allowed to standardize the process. Moreover the tested plant could be used in small dairies for its small size and facility of use. Product innovation focused on the production of short-and medium-ripened pasta filata cheeses obtained from cow's milk mixed with ewe or goat milk. The realization of pasta filata products innovated in formulation is a strong reality in Italy for buffalo cheese. Instead for cow/ewe cheeses and for cow/goat cheeses few production are found in Europe, since milk composition influences technology and yield. The “quota latte” limits the cow milk production, therefore products realized with different milk may have different positive effects on territory. The obtained products showed good physical-chemical and organoleptic characteristics, having distinctive and positive characteristics that can allow a product diversification.
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Simeoni, Francesca. "Trascendenza e cambiamento in Filone di Alessandria. La chiave del paradosso." Doctoral thesis, Università degli studi di Padova, 2017. http://hdl.handle.net/11577/3425718.
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The thesis explores the connection between immutability and change as a key to the relationship between man and God within the thought of Philo of Alexandria. Considering the divine name expressed in Ex. 3,14, where God presents himself as Being, divine identity is conceived by Philo as essentially exempt from beginning and mutation. On the other hand, man and cosmos are marked by a state of change and their becoming is characterized by fatigue, effort and instability. Starting from this preliminary analysis, the thesis develops the issue of ethical and cognitive human progress toward the transcendent God. Knowledge has the task of reaching the unknowable Being and virtue coincides with platonic assimilation to a God which is however radically dissimilar to man. The relationship between man and God is therefore enlightened by the role of paradox. Paradox was a logic and ethical tool connected to the rational power of the stoic sage. It is converted by Philo toward the act of abdication of the virtuous man who recognizes the radical otherness of God.La tesi esplora il nesso tra immutabilità e cambiamento come chiave del rapporto tra uomo e Dio nel pensiero di Filone di Alessandria. A partire dall’identità tra Dio ed Essere individuata dall’Alessandrino in Ex. 3,14, la configurazione del divino viene strutturata come essenzialmente estranea a origine e mutamento. D’altro canto il cosmo e l’uomo sono contrassegnati dalla condizione generata e diveniente: in essi il cambiamento si traduce in fatica e instabilità. A partire da quest’analisi preliminare, la tesi indaga poi il percorso conoscitivo ed etico proposto all’uomo in rapporto alla trascendenza. Il pensiero è chiamato alla conoscenza dell’inconoscibile e la virtù coincide con l’assimilazione platonica a un Dio però radicalmente dissimile dall’uomo. Per questo il rapporto tra uomo e Dio viene illuminato dal paradosso: strumento logico ed etico decisivo nello Stoicismo, esso viene trasformato da Filone in una chiave capace di illuminare il movimento di rinuncia del saggio di fronte alla radicale alterità divina.
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Kufa, Martin. "Planární fraktální filtr na substrátu s porušenou zemí." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2012. http://www.nusl.cz/ntk/nusl-219832.
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The diploma thesis is focused on the design of planar filters combining fractal layouts and defected ground substrates. The diploma thesis can be divided into three main parts. First, basic knowledge about fractals is presented (creation of Minkowski Island and Koch loop, e.g.). Then, the principle of defected ground structure is described, and a combination of fractal motives with a defected ground structure is briefly introduced. Properties of investigated structures are verified by CST Microwave Studio and Ansoft HFSS. Second, different defected ground structures under the 50 transmission line are designed, and conventional equivalent filters are created. Filters are simulated and compared. In final, the investigated filters are recalculated for the substrate Arlon 25N, simulated, manufactured, measured and confronted with a conventional filter on the defected ground substrate.
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Jébrak, Michel. "Contribution à l'histoire naturelle des filons (F, Ba) du domaine varisque français et marocain : essai de caractérisation structurale et géochimique des filons en extension et en décrochement /." Orléans : BRGM, 1985. http://catalogue.bnf.fr/ark:/12148/cb34874040z.
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Escamilla-Elizalde, Jesús David. "La "Respuesta a sor Filotea" : una pública defensa de la "Carta Atengórica"." Thesis, McGill University, 1998. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=29396.
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The thesis focuses on two letters written by Sor Juana Ines de la Cruz: The "Carta Atenagorica" (1690) and The "Respuesta a sor Filotea" (1691), as well as on the "Carta de sor Filotea de la Cruz a sor Juana Ines de la Cruz" (1690), written by Manuel Fernandez de Santa Cruz, bishop of Puebla. The "Respuesta a sor Filotea," inspired by the "Carta de sor Filotea," presents an elaborated defence of the "Carta Atenagorica" and the right to discuss theological principles that the author claims on her behalf.The thesis was inspired by the main theme of the "Respuesta a sor Filotea" as well as the polemical content of the other two letters. The introduction briefly presents the historical context in which the polemic took place. It also explains the objectives of the thesis and comments some of the critical work related to this theme. Chapters one and two analyse the "Carta Atenagorica," focusing on the theological discussion.
Chapters three and four analyse the "Carta de sor Filotea." Chapter three examines the intentions of the bishop of Puebla when he published Sor Juana's letter under the title of "Atenagorica." The analysis of the bishop's letter is in chapter four.
Chapter five examines, in the light of the preceding chapters, the "Respuesta a sor Filotea" and presents the conclusion.
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Reis, Adolfo Rodrigues. "Mecanismos subjacentes ao efeito da manipulação neonatal sobre o vínculo mãe/filhote." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2014. http://hdl.handle.net/10183/153266.
Full textAbstract:
Ao nascerem, os mamíferos não estão com o sistema nervoso plenamente desenvolvido e os primeiros dias de vida representam uma fase crítica para o desenvolvimento desse sistema. De fato, nesta fase o encéfalo está passando por diversos processos fundamentais como organização funcional das redes neurais, proliferação neuronal, migração, diferenciação, além de gliogênese e mielinização. Em ratos, um procedimento simples, como “manipular” os filhotes por alguns minutos durante a primeira semana de vida, pode marcar decisivamente o desenvolvimento do indivíduo. Assim, a manipulação neonatal tem sido muito utilizada para se examinar os mecanismos pelos quais variações ambientais podem afetar o desenvolvimento do filhote. A manipulação neonatal promove uma série de alterações comportamentais e neuroendócrinas que se caracterizam basicamente por uma diminuição do medo e da resposta ao estresse no adulto. Embora muitos autores até caracterizem a manipulação como uma intervenção positiva ela também pode provocar graves déficits em comportamentos sociais e reprodutivos para a prole aparecendo desde o inicio do desenvolvimento e persistindo até a vida adulta. Além de seu efeito sobre os filhotes, estudos tem demostrado que intervenções na prole no período neonatal também afetam de forma duradoura a resposta ao estresse das genitoras, mas este tema ainda é muito pouco explorado pela literatura Portanto, na primeira parte desta tese, iremos estudar os efeitos da manipulação neonatal sobre a formação do vínculo mãe-filhote, tentando associar mudanças no comportamento da mãe ao longo dos 10 primeiros dias pós-parto com a preferencia pelo odor do ninho em filhotes testados no labirinto em Y. Na segunda parte desta tese iremos abordar os efeitos da manipulação sobre a resposta ao estresse agudo e crônico em ratas que tiveram seus filhotes manipulados no período neonatal, para isso submetemos genitoras dos grupos controle e manipulado após o desmame a um dos dois protocolos descritos a seguir: com estresse (estresse por contenção de movimentos 1h/dia por 7 dias) ou sem estresse (nenhuma intervenção após o desmame) e testamos os animais através do teste de nado forçado para observar mudanças na resposta emocional. Também medimos os níveis de BDNF e corticosterona no plasma após o teste e medimos o peso das adrenais para verificar o efeito da manipulação na resposta ao estresse das genitoras Os resultados dessa tese mostram que a manipulação neonatal afeta a estrutura do comportamento maternal, mudando a sequencia e a sincronia do comportamento da mãe com o filhote, o que poderia ser em parte a causa da alteração no comportamento de preferencia pelo odor do ninho observado em animais manipulados, principalmente nas fêmeas. Além disso, observamos que a manipulação afeta de forma duradoura a resposta ao estresse (agudo e crônico) das genitoras, podendo alterar a resposta emocional desses animais e predispor a sintomas do tipo depressivo em resposta ao estresse agudo Esses resultados reforçam a ideia de que o estudo dos efeitos duradouros da manipulação não só nos filhotes, mas também no organismo materno, podem servir como uma importante ferramenta para elaboração de projetos clínicos, visando a exploração da existência de comportamentos similares em humanos. Isso ajudará na elaboração de politicas de saúde publica que visem minimizar os efeitos de eventos adversos acontecidos no inicio da vida sobre a saúde física e mental tanto da mãe quanto da criança.Mammals are not born with fully developed nervous system, and the first days of life represent a critical stage in the development of this system. In fact, at this stage, the brain is undergoing many fundamental processes such as functional organization of neural networks, neuronal proliferation, migration, differentiation, gliogenesis and myelination. In rats, a simple procedure such as "handling" the pups for a few minutes during the first week of life can decisively mark the development of the individual. Thus, neonatal handling has been widely used to examine the mechanisms by which environmental adversity can affect the development of the pups. Neonatal handling promotes a series of behavioral and neuroendocrine changes that are characterized primarily by a decrease of fear and stress responses in the adult. Although many authors characterize the handling procedure as a positive intervention, it is also associated with severe deficits in social and reproductive behaviors of the offspring that appear early during development and persist into adulthood. Apart from its effect on the pups, studies have shown that interventions in the offspring during the neonatal period can also induce long lasting effects in the maternal stress response, but this subject is still little explored in the literature Therefore, in the first part of this thesis, we will study the effects of neonatal handling on the mother-pups’ bond formation, trying to associate changes in maternal behavior over the first 10 days postpartum with the preference for the odor of the nest in pups tested the Y maze. The second part of this thesis will address the effects of neonatal handling on the acute and chronic stress response in dams that had their pups handled. For this purpose, we submitted mothers of control and manipulated groups after weaning to: stress (restraint 1h/day for 7 days) or no stress (no intervention after weaning) and tested the animals using the forced swim test to observe changes in emotional response. We also measured plasma BDNF and corticosterone levels after the test and the adrenals’ weight to verify the effect of handling on the dam’s stress response. The results of this thesis show that neonatal handling affects the structure of maternal behavior, changing the behavioral sequence and synchrony of the mother with her pups, which could be in part the cause of the altered social behaviors observed in handled pups, especially in females. Moreover, we observed that handling affects the dam´s response to stress (acute and chronic), and may alter the emotional response of the dams increasing the susceptibility to developing psychiatric disorders such as depression at least in response to acute stress These results reinforce the idea that investigating the long lasting effects of handling not only in the young, but also in the dam’s physiology becomes an important tool for the development of clinical studies, aiming at exploring the existence of similar effects in humans. The final goal will be the elaboration of public health policy to minimize the effects of early life adverse events on physical and mental health of both mothers and their children.
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LE, BRIS FABIEN. "Etude numerique et experimentale des filets souples immerges -applications aux cages piscicoles-." Nantes, 1999. http://www.theses.fr/1999NANT2078.
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Cette these constitue le troisieme volet concernant la determination des formes et des tensions des filets souples immerges. Apres les premieres etudes statiques menees par f. Theret, j. S bessonneau developpait les methodes de calcul pour determiner le comportement dynamique de l'ensemble du train de peche dans differentes conditions. Nous avons repris les principes de base de ces chercheurs. La structure reticulee est decomposee en barreaux rigides articules autour de liaisons rotules. Le principe de resolution consiste a ecrire les equations de la dynamique du point materiel en chaque noeud du treillis. L'application aux cages piscicoles nous amene a developper nos algorithmes pour, par exemple, empecher un noeud de la structure de traverser une nappe de filet. Nous proposons a cet effet deux methodes de traitement du contact sans frottement en dynamique. La methode classique des penalites est conditionnellement stable et necessite l'introduction de deux parametres. La seconde alternative, basee sur une methode de prediction-correction, donne de tres bons resultats au prix d'un temps de calcul plus important. Enfin, ces travaux etaient egalement un pretexte pour mener une etude experimentale des filets souples immerges. Un dispositif de mesure des efforts hydrodynamiques agissant sur des panneaux de filets tendus en travers d'un courant nous permet de confirmer la validite du modele de landweber-richtmeyer sauf aux faibles incidences. Nous avons egalement effectue des mesures de champ de vitesse derriere les mailles du filet par velocimetrie laser.
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Abourezq, Ibraheem. "VOIDS IN SONIC FILLTM RESTORATIONS COMPARED TO TRADITIONAL INCREMENTALLY-FILLED COMPOSITE RESTORATIONS." Master's thesis, Temple University Libraries, 2014. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/282233.
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Oral BiologyM.S.
SonicFillTM is a new composite resin and delivery system designed to provide rapid filling of cavity preparations by decreasing viscosity through application of sonic energy. However, it may produce unwanted air voids in the final restoration due to the short filling time. Air voids compromise long-term performance by providing weak foci, discontinuity at cavosurface margins and at internal cavity walls, and potential crack propagation. This study assessed the locations, sizes, and numbers of voids in SonicFill restorations compared with traditional composite resin restorations in a set of extracted molars with mesio-occlusal-distal (MOD) cavity preparations. Fifty noncarious intact extracted third molars were collected randomly from a large collection of discarded anonymous tooth specimens. Standardized MOD cavity preparations were cut, and teeth were assigned randomly to one of two groups (n = 25). The first group was restored with SonicFill composite in two steps. The second group was restored with Herculite UltraTM using an multiple increment layering technique (1-2 mm per layer). Cross-sectional images of the filling were taken by digital microscope. A total of 196 voids were found in the 50 specimens: 97 in SonicFill restorations and 99 in conventional restorations. Mean number of voids in SonicFill restorations was 3.88 versus 3.96 for conventional restorations. Mean percentage of void area in SonicFill restorations was 0.588% versus 0.508% for conventional restorations. Unpaired t tests for these differences indicated no statistically significant differences (p =.931 and p =.629, respectively). One-way ANOVA tests for mean void count and mean void area percentage differences by three location zones for conventional and SonicFill restorations also indicated no significant differences among the groups. The bulk-fill SonicFill system does not result in increased or decreased numbers or ii area of voids within Class II MOD restorations compared with a conventional composite resin layering system.
Temple University--Theses
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Ghoussoub, Leyla. "Analyse de quelques éléments du comportement des écrans de filets pare-blocs." Thesis, Paris Est, 2014. http://www.theses.fr/2014PEST1171/document.
Full textAbstract:
Les écrans de filets pare-blocs sont des structures complexes hétérogènes formés d'un filet métallique maintenu par des câbles, des poteaux et des haubans munis de dissipateurs d'énergie. Le filet intercepte la trajectoire du bloc rocheux et résiste à sa perforation en dissipant l'énergie cinétique de l'impact dans les différents éléments de la structure. Le problème de modélisation posé par ces structures met en jeu de nombreuses non-linéarités tant matérielles que géométriques : l'impact dynamique rapide, les grandes déformations du filet et des câbles, les glissements et les frottements (dans le filet, du filet sur les câbles ou des câbles sur les supports), la plastification du filet ou des éléments dissipateurs, ainsi qu'un très grand nombre de paramètres géométriques ou technologiques (type de filet, type de dissipateur, type d'architecture de kit).Les travaux de doctorat présentés ici proposent deux nouvelles approches pour la modélisation numérique de deux principaux éléments du comportement des écrans de filets pare-blocs : les propriétés élastiques intrinsèques des filets et l'effet rideau, c'est-à-dire le glissement du filet sur les câbles de rives. Sur le premier point, il est à noter que les recherches qui ont été consacrées jusqu'à présent à l'étude du filet se concentrent pour l'essentiel sur des typologies particulières. Dans ce travail, les propriétés intrinsèques des différentes technologies de filets sont déterminées à l'aide de la méthode d'homogénéisation des milieux périodiques discrets dans laquelle chaque filet est remplacé par une membrane homogène. Une comparaison des comportements non-linéaires des principales technologies de filets est effectuée et met en évidence des différences remarquables dans la distribution des efforts aux bords de chaque filet et les caractéristiques des déformations. Concernant le deuxième point, plusieurs études ont montré l'importance de la modélisation des câbles glissants pour reproduire le comportement réel de la structure. Dans la deuxième partie de la thèse, l'effet rideau est modélisé. Un modèle analytique de câble glissant à « n » nœuds est développé. Ensuite, ce modèle est implémenté dans un algorithme numérique mettant en œuvre une utilisation avancée du logiciel de calcul par éléments finis code-aster en statique et en dynamique. Cet algorithme est validé par des calculs analytiques et les limites de la méthode utilisée sont exposées. Enfin, des tests numériques sont conduits sur des modèles de filets en tenant compte de l'effet rideau pour évaluer l'influence du modèle développé sur les résultats. Des remarques, observations et conseils sont déduits afin d'aboutir à un outil numérique d'aide à la conception des écrans de filets pare-blocsSoft rockfall barriers are complex structures that generally consist of a metallic net supported by steel posts and cables with brake elements. Several experimental and numerical studies have been carried out to evaluate their behaviour and a technical agreement in EU was recently established to certify these barriers based on experimental tests. Actually, manufacturers develop rockfall kits with their own technical specificities. The objective of the present work is to determine the intrinsic properties of most common nets technologies and to investigate their influence on the overall mechanical behaviour of the structure. To this end, a comprehensive comparison between the local behaviours of the different nets is first presented using equivalent homogeneous membranes. Results derived for square nets under static concentrated loading illustrate the influence of the manufacturing technology on the deflection and stresses distribution. Then, a numerical and analytical model for the so-called “curtain effect” is developed and validated. It is focused on the capacity of the proposed methodology to study and evaluate the response of the whole barrier