Дисертації з теми "Ping test"
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Smith, Micah David 1976. "Pin-joint test rig design and scaling laws." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/88851.
Повний текст джерелаFredriksson, Emelie. "Tent isolation experiment in an advanced Scots pine seed orchard." Thesis, Umeå universitet, Institutionen för ekologi, miljö och geovetenskap, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-76290.
Повний текст джерелаBariola, Louis A. "PREP and DROPP for Controlling Pink Bollworm in 1986 Tests." College of Agriculture, University of Arizona (Tucson, AZ), 1987. http://hdl.handle.net/10150/204495.
Повний текст джерелаHenneberry, T. J., Jech L. Forlow, and R. A. Burke. "Steinernematid Nematode Infections of Pink Bollworm Larvae in Field Tests." College of Agriculture, University of Arizona (Tucson, AZ), 1997. http://hdl.handle.net/10150/211105.
Повний текст джерелаSundman, Ann-Sofie. "Personality in piglets : Is there a difference in personality traits between pigs from different teat order positions?" Thesis, Linköpings universitet, Institutionen för fysik, kemi och biologi, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-69596.
Повний текст джерелаVendrame, Saimon. "Integridade superficial do aço-rápido AISI M3:2 após o processo de retificação /." Bauru, 2019. http://hdl.handle.net/11449/191113.
Повний текст джерелаResumo: Aços-rápidos são materiais que exibem elevada resistência ao desgaste abrasivo, aliada a uma tenacidade relativamente alta, propriedades estas que os tornam adequados para se fabricar ferramentas de corte. Grande parte de suas propriedades se deve a presença de carbonetos na microestrutura. Ao mesmo tempo que estas propriedades mecânicas são favoráveis para a utilização como ferramentas, tornam-se desafios na sua fabricação. O processo de retificação é empregado nas últimas etapas de fabricação de ferramentas de corte como machos e brocas e a presença dos carbonetos afetam a eficiência dos rebolos. Neste contexto, este trabalho visa investigar o quanto a diferença de microestrutura de aços-rápidos classe AISI M3:2, obtidos de diferentes fornecedores, influencia na retificação, levando em consideração a integridade superficial. Os materiais, aqui nomeados como M-A, M-B e M-C, foram avaliados sob três aspectos: características da microestrutura, resistência à abrasão e integridade da superfície após a retificação. Da microestrutura os carbonetos tipo MC e M6C, foram descritos quanto à forma e a distribuição, utilizando para isso MEV e EDS. A resistência à abrasão dos materiais foi medida recorrendo ao método de ensaio tribológico pino-lixa. Após esta caracterização, foram realizados ensaios de retificação tangencial plana com rebolo de Carboneto de Silício (SiC) em várias penetrações de trabalho (entre 10 µm e 30 µm). As superfícies das amostras foram avaliadas mensurando a rug... (Resumo completo, clicar acesso eletrônico abaixo)
High-Speed Steels are materials that exhibit high abrasive wear resistance coupled withrelatively high toughness, properties that make them suitable for making cutting tools. Much ofits properties are due to the presence of carbides in the microstructure. While these mechanicalproperties are favorable for use as tools, they impose challenges in their manufacture. Thegrinding process is employed in the final stages of the cutting tools manufacturing, such as tapsand drills and the presence of carbides affects the efficiency of the grinding wheels. In thiscontext, this work aims to investigate how the microstructure difference of class AISI M3: 2steel, obtained from different suppliers, influences the grinding, taking into consideration thesurface integrity. The materials, here named M-A, M-B, and M-C, were evaluated under threeaspects: microstructure characteristics, abrasion resistance, and surface integrity after grinding.From the microstructure, carbides type MC and M6C were described regarding the shape anddistribution, using for this purpose SEM and EDS. The abrasive wear resistance of the materialswas measured using the pin-abrasive tribological test. After this characterization, flat tangentialgrinding tests were performed, using silicon carbide grinding wheel (SiC), in various workdepths (between 10 μm and 30 μm). The ground samples surfaces were evaluated by measuringthe roughness parameters, evaluated by SEM, and the microhardness profil
Doutor
RUPNIEWSKI, JAKUB JAN. "Evaluation of linear force actuators in a pin-on-disc test rig application." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-286015.
Повний текст джерелаExamensarbetet utvärderar och jämför två linjära manöverdon för att applicera en last på en stiftmot-skiva tribologitestrigg. Det första manöverdonet är en DC-motor med en kulskruv. Det andra manöverdonet är en talspole. Manöverdonen behöver följa kraftprofilsreferensen som motsvarar kontaktfriktionen i gängorna vid en skruvdragning. En Simulink modell av en stiftmot- skiva testrigg skapades för att jämföra manöverdonen. Styrenheterna för båda manöverdonen designades med samma designmetod. 27 experiment genomfördes i Simulink med varierande kraftreferenser, modellparametrar och störningar. Resultaten av alla experiment utvärderades med det kvadratiska medelvärdet för att jämföra de två manöverdonen. Talspolen var överlägsen DC-motorn med kulskruven i alla experiment. Talspolen användes därför i stiftmot-skiva testriggen för att undersöka friktionsvariationen under en skruvdragning. Simuleringarna visade en stor betydelse av skivvåg på kraftvariation. Friktion som förekommer i linjära ställdon är en viktig fråga vid korrekt prestanda för referenskraftprofilspårning, och därför ska ställdonen utformas noggrant och väljas för att minimera friktionen. Den utvecklade simuleringsmodellen ska valideras i framtiden för att bevisa att avhandlingens resultat överensstämmer med verkligheten. När modellen väl har validerats kan den användas för att prova olika styrenhetsarkitekturer och hitta den som passar bäst i referensstyrningsprofilens spårningsapplikation.
Xiang, Bin. "Genetic Analysis of Diallel Tests of Loblolly Pine (Pinus taeda L.)." NCSU, 2001. http://www.lib.ncsu.edu/theses/available/etd-20010105-093243.
Повний текст джерелаAbstractBIN XIANG Genetic Analysis of Diallel Tests of Loblolly Pine (Pinus taeda L.) (Under the direction of Dr. Bailian Li)A new approach was developed for analyzing diallel tests with SAS PROC MIXED and PROC IML. The new method can estimate variance components, obtain BLUE (best linear unbiased estimators) of fixed effects and BLUP (best linear unbiased predictors) of random genetic effects simultaneously. A new formula based on BLUP was further developed to predict individual tree breeding values. This new analytical method was validated using computer simulation and was compared with other existing programs. To analyze disconnected diallel mating designs with more than one diallel, simulated data generated with known parameters were analyzed using BLUP to compare three alternative models, which include diallel as fixed effect (Model 1), random effect (Model 2) or no diallel effect (Model 3). Both Model 1 and Model 3 produced unbiased GCA (general combining ability) variance estimates, while Model 2 resulted in downward biased GCA variance estimate. The accuracy of BLUP prediction for three models was very close, with Model 3 slightly better than the other two. Statistical approaches were also evaluated for combining multiple disconnected diallel test series in a given region. The best GCA sample variance prediction in the class of linear combination of local variance estimates was derived. Simulation study showed that a checklot adjustment was very critical to improve the prediction of genetic values obtained using BLUP analysis. Additional adjustment with improved GCA sample variance prediction could improve the correlation slightly beyond checklot adjustment.Analysis of annual measurement through age 8 from a total of 275 parents, 690 full-sib families from 23 diallel tests of loblolly pine in Northern, Coastal and Piedmont test regions showed: 1) dominance variance was small (20-40% of total genetic variance) relative to additive variance; 2) heritability increased over time, and the magnitude of heritabilities for diameter at breast height (DBH) and volume was comparable with the corresponding heritabilities for height; 3) DBH and volume had higher genetic correlation with 8-year volume than height. Genetic gain prediction in year-8 volume for selection on height and volume indicated that: 1) selection on volume yielded more gain than selection on height; 2) Coastal population had the greatest correlated response, followed by Piedmont and Northern population; 3) family plus within family selection based on total genetic component can capture the most genetic gain; 4) for all selection methods, additional gain (10-40%) can be achieved by capturing non-additive genetic component.Selection efficiency study of height and volume for three test regions indicated that earlier selection appeared to be more efficient than direct selection on year-8 volume in most selection methods. Family selection can be performed at age 2 or 3 for height and at age 4 for DBH and volume. Combined selection (family plus within family) was highly efficient at age 3 or 4.
Schöpf, Roberto Alexandre. "Estudo do desgaste abrasivo e adesivo em aços ferramenta por meio do ensaio de pino-disco." Universidade do Estado de Santa Catarina, 2011. http://tede.udesc.br/handle/handle/1776.
Повний текст джерелаCoordenação de Aperfeiçoamento de Pessoal de Nível Superior
Among several mechanisms of wear of materials, abrasive and adhesive wear respond for the largest contribution in tools and equipment failures at the mechanical industry. Tooling used in the manufacture of stators, known as lamella, fails due to these types of wear. The failures have origin in sliding wear and remove the enamel from the wire of the stator during the injection process. The removal of enamel results in short circuit between turns and consequent risk for the final consumer. It is common to correlate the wear resistance as a function dependent only on hardness of the involved materials in contact, however, there are other characteristics that also influence the wear such as: the type of crystalline structure and the presence of precipitates in the metal matrix, as well as the nature of them. The present study has analyzed the wear mechanisms existent in tool wear. The pin-on-disc test was used to evaluate eight different tool steels, positioning them in the same scale and comparing with the steel currently used at the process. Two groups of tool steels were evaluated, those manufactured by powder metallurgy and those obtained by conventional metallurgical method. Two types of pin-on-disc tests were performed. In the first test, as counter-face or disc, a grinding wheel made with silicon carbide was used; the main objective of this test was to evaluate the abrasive wear resistance. In the second test, the discs were manufactured using low alloy electric steel; the wear resistance predominantly adhesive was the response variable for this test. The results were correlated with some characteristics of the steels studied: hardness, the energy absorbed during Charpy impact test, density and content of alloying elements that are hard carbide formers. The results have shown a better wear resistance for steels produced by the Powder Metallurgy process. Steels with higher levels of alloying elements achieve better results, particularly in the adhesive wear test. CPM9V and Sinter 30 tool steels presented the best performances for wear resistance. Considering the application of these results in operation conditions, the CPM9V steel has advantage of a lower hardness and consequently greater toughness which is an important characteristic as well.
Entre os diversos mecanismos de desgaste, os desgastes abrasivo e adesivo são os que respondem pela maior contribuição nas falhas em equipamentos e ferramentais da indústria mecânica. Ferramentas utilizadas na fabricação de estatores, conhecidas como lamelas, falham em decorrência destes tipos de desgaste. As falhas têm procedência no desgaste por deslizamento e provocam remoção do isolante dos fios do estator durante o processo de inserção. A remoção do esmalte resulta em curto circuito entre espiras e conseqüente risco ao usuário final. É comum relacionar a resistência ao desgaste como uma função dependente apenas da dureza dos materiais envolvidos, no entanto, existem outras características que também influenciam no desgaste, tais como: o tipo de estrutura cristalina, existência de precipitados na matriz metálica e sua homogeneidade, bem como, a natureza dos mesmos. Por meio do presente estudo, analisaram-se os mecanismos presentes no desgaste de aços ferramenta utilizados na fabricação de estatores. Utilizandose o teste pino-disco, avaliou-se a resistência ao desgaste de oito diferentes aços ferramenta, classificando-os quanto à resistência ao desgaste e situando-os frente ao aço atualmente utilizado neste processo. Dois grupos de aços foram avaliados, os fabricados pela metalurgia do pó e os obtidos pelo método convencional de metalurgia. Dois tipos de ensaios pino-disco foram realizados. No primeiro teste, como contra-face ou disco, foi utilizado um rebolo de carbeto de silício; neste teste o objetivo principal foi avaliar a resistência ao desgaste abrasivo. No segundo teste, o disco foi fabricado com aço de baixa liga, neste teste, a resistência ao desgaste predominantemente adesivo foi à variável resposta. Os resultados obtidos foram correlacionados com determinadas características dos aços estudados: dureza, energia absorvida no impacto do ensaio Charpy, densidade, percentual de elementos de liga formadores de carbonetos de alta dureza e microestrutura. Os resultados mostraram que os aços fabricados pelo processo de Metalurgia do Pó apresentaram maiores resistências ao desgaste. Os aços ferramenta com teores maiores de elementos de liga obtiveram melhores resultados, sobretudo no ensaio de resistência ao desgaste adesivo. Os aços ferramenta CPM9V e Sinter 30 foram os que apresentaram maior desempenho na resistência ao desgaste. Considerando a aplicação deste resultados nas condições de operação, o aço CPM9V possui como vantagem uma menor dureza e conseqüente maior tenacidade, característica também importante para a função.
Gaskill, Sally Ann. "A detailed investigation of acoustic distortion from human and guinea-pig ears." Thesis, University of Sussex, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240009.
Повний текст джерелаPrzybylowicz, Eric Thomas. "Weldability Evaluation of High-Cr Ni-Base Filler Metals using the Cast Pin Tear Test." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1429792705.
Повний текст джерелаVasconcelos, Rafaela Andrade de [UNESP]. "Avaliação da influência de materiais obturadores endodônticos sobre a resistência de união adesiva de pinos de fibra de vidro cimentados." Universidade Estadual Paulista (UNESP), 2016. http://hdl.handle.net/11449/138113.
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
O propósito deste estudo foi avaliar, in vitro, a influência de remanescente de materiais obturadores endodônticos, após desobturação e preparo para pino, sobre a resistência de união adesiva de pinos de fibra de vidro cimentados. Foram utilizados 60 dentes humanos unirradiculados sem coroa. As raízes foram preparadas pela técnica coroa-ápice com sistema Reciproc. Para obturação, as raízes foram divididas em grupos (n = 10) de acordo com o cimento endodôntico utilizado: SO= sem obturação; GP=guta percha sem cimento; AHP= guta-percha + AHPlus; SLP= guta-percha + Sealapex; IRT= guta-percha + iRoot SP; e ERZ= guta-percha + EndoRez. As raízes foram obturadas pela técnica do cone único. A cimentação dos pinos de fibra de vidro Rebilda n.12 foi realizada com sistema adesivo futurabond DC e cimento Rebilda DC em 10 mm do comprimento da raiz. Após esse período, as raízes foram seccionadas obtendo-se discos de 2 mm de espessura em cada terço da raiz (3 discos por raiz) que foram submetidos ao teste de push out, análise por meio de uma lupa estereoscópica (40x) para identificação através de scores da presença de remanescente de material obturador na luz do canal e avaliação por espectroscopia de energia dispersiva (EDS) para identificação de remanescente de componentes químicos do cimento endodôntico presentes nos túbulos dentinários. Os dados obtidos foram analisados estatisticamente pelos testes de Kruskal Wallis, Qui Quadrado e teste de Anova e Tukey, todos com nível de significância de 5%. Não houve diferença estatística para a resistência adesiva entre os cimentos na região cervical (p = 0,49), media (p = 0,28) e apical (p = 0,09). Os grupos SLP e ERZ apresentaram menos remanescente de material obturador nas regiões cervical (p = 0,045) e apical (p = 0,006). Significantes diferenças de remanescentes de componentes químicos foram observadas na região apical dos grupos AHP, IRT e SLP. Conclui-se que os materiais endodônticos não influenciaram na resistência de união adesiva de pinos de fibra de vidro.
The purpose of this study was to evaluate the influence of remnants endodontic filling material in root canal on the bond strength of fiberglass posts cemented. Sixty single-rooted human teeth were used.Crowns were removed. The roots were prepared by crown-down technique with Reciproc system. For fillings, the roots were divided (n = 10) according to the sealer used: SO- without fillings; GP-gutta-percha without sealer; AHP- gutta-percha + AHPlus; SLP- gutta-percha + Sealapex; IRT-gutta-percha + iRoot SP; ERZ-and gutta-percha + EndoRez. Single cone obturation technique was used. After root canal fillings, the teeth were kept in an oven 37 0C for 7 days. Cementing fiberglass posts Rebilda n.12 was performed with fiber adhesive system Futurabond DC and cement Rebilda DC in 10 mm of root length, getting stored in an oven at 37 0C for 48 h. After this period, roots were sectioned obtaining 1 disc of 2 mm thickness in each third of the root (3 discs per root), this discs were underwent to push out test, analyzed by means of a stereomicroscope (40x) to identify the presence of remnants of filling material in the lumen of the canal, and then evaluated by energy dispersive spectroscopy (EDS) for identification of chemical components remnants sealer present in the dentinal tubules. Datas were analyzed with Kruskal-Wallis test, Chi square test, and also Anova and Tukey test, 5% of significance. There were no significant differences in push-out bond strengths among the different groups in the coronal (p = 0.49), middle (p = 0.28) or apical third (p = 0.09). Sealeapex and EndoRez groups showed significantly less remnants of filling material at coronal (p = 0.045) and apical levels (p = 0.006).Significant differences of chemical components remnants were found in AHP, IRT and SLP groups on apical third. It is concluded that residual endodontic filling material does not influence on the bond strength of fiberglass.
Moore, William McGee. "Habitat use and activity patterns of Gopher Tortoises (Gopherus polyphemus) inhabiting military test ranges and forested sandhills at Eglin Air Force Base, Florida." Thesis, Virginia Tech, 2019. http://hdl.handle.net/10919/94559.
Повний текст джерелаMaster of Science
The Gopher Tortoise is an important component of a number of upland ecological communities throughout the southeastern U.S., but populations have experienced significant declines over the past century, largely in conjunction with the loss of longleaf pine (Pinus palustris) forests. Military installations have preserved large tracts of longleaf pine, often while implementing prescribed fires that mimic natural lightning-ignited fires (frequent low intensity fire is a necessary component of longleaf pine communities), which in turn has provided refuges for many imperiled longleaf associates, including the Gopher Tortoise. Eglin Air Force Base in the western Florida panhandle presents a unique situation in which large tracts of longleaf pine sandhill (suitable Gopher Tortoise habitat) are available, but tortoise sub-populations on base are small, and many tortoises currently inhabit treeless military testing and training ranges (test ranges) rather than typical forested sandhill. My objectives were therefore to identify factors that may have been influencing use of test ranges as habitat by gopher tortoises and that might explain observed differences in burrow densities among sites. In Chapter 1, I compared vegetation structure, composition, and burrow site selection among sites and between forested and test range vegetation types. I also attempted to identify relationships between vegetation characteristics and variation in burrow densities (a proxy for abundance within a given area) among sites. In Chapter 2, I distributed a questionnaire to other military installations throughout the southeast to identify common management techniques used to maintain testing and training areas at other tortoise-occupied military installations, as these techniques likely affect their suitability as tortoise habitat. In Chapter 3, I compared surface activity patterns of juvenile Gopher Tortoises between forested and test range vegetation types, as surface activity in these vulnerable, but important size classes may affect survival rates. I found that test ranges generally had greater herbaceous vegetation cover than forested sites (greater forage availability), were highly species diverse in terms of groundcover plants, and had herbaceous communities that shared a number of common sandhill plant species with forested sites, but also were unique in a number of ways. I also found that adult tortoises (burrow site selection) and juvenile tortoises (surface activity) may have exhibited different behaviors in novel test range vegetation types compared to individuals inhabiting more natural longleaf pine sandhill on base. However, I did not find strong evidence that current vegetation structure or composition was related to observed differences in burrow densities among sites and that other factors might have played a greater role in structuring Eglin’s remnant tortoise sub-populations.
Johansson, Nathalie. "Teat position and personality in piglets, Sus scrofa." Thesis, Linköpings universitet, Zoologi, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-70783.
Повний текст джерелаSantos, Larissa Germiniani dos. "Phrases in Noise Test (PINT): adaptação cultural para o português brasileiro e aplicabilidade na avaliação do sistema de frequência modulada." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/25/25143/tde-02062015-161419/.
Повний текст джерелаTo evaluate the communication and listening skills of children with hearing loss is extremely important since the monitoring of hearing developing for verification and planning of the habilitation or rehabilitation process is essential. On the national scene there is no standardized test for assessment children speech perception in noise. This study proposes a cultural adaptation of the speech perception procedure Phrases in Noise Test into Brazilian Portuguese, the validation and verification of its effectiveness in the evaluation of the Frequency Modulation System. The test phrases were translated. Speech and noise stimuli were adapted and adjusted using an audio editor program in order to equalize the intelligibility of sentences. Before the test application in children, a calibration with 10 normal hearing adults was performed to adjust the intensity of the speech signal. Two sentences that could influence the final result of the test in children with hearing loss were excluded and 10 phrases with equally intelligibility between them were selected. Six test lists of the Portuguese Brazilian version of the test were created and each phrase was repeated twice a list in a pseudo-randomized order. The test begins with the phrases at a signal-to-noise relation descending from a +15dB to a -12dB and ends ascending from a -12 to a +15 signal-to-noise relation with a fixed intensity and varying noise. The listening position adopted was the speech presented at 0-degree azimuth and noise at 180-degree azimuth. Verification and validation of lists were obtained with the test application in 10 children with normal hearing and 12 children with hearing loss users of cochlear implant and Frequency Modulation System. The results showed that was not found learning effect in the lists used in children with normal hearing. There were no significant differences in test application sequences and at the ages in the group of children with hearing loss. The conditions with the Frequency Modulation System were statistically different from conditions without it, confirming the importance and improved signal-to-noise relation using this device. Concurrent and convergent validity measures were assessed for test validation. This study concluded that the Phrases in Noise Test was translated, adapted and validated for Brazilian Portuguese, being named PINT Brazil, and is effective to assess speech perception in noise from four years old children with hearing loss users of the cochlear implant and Frequency Modulation System.
Svensson, Malin. "Personality types and teat order in piglets." Thesis, Linköpings universitet, Molekylär genetik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-69509.
Повний текст джерелаCarvalho, Carlos Augusto Ramos de. "Efeito da técnica úmida simplificada de adesão com etanol na cimentação intraradicular de pinos de fibra." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/25/25131/tde-05122011-092428/.
Повний текст джерелаThis study evaluated the push-out bond strength of glass fiber posts adhesively bonded to intraradicular dentin using a standard unfilled resin as luting agent in combination with an experimental and a commercially available adhesive. Twenty extracted single-rooted human teeth were endodontically treated. Specimens were assigned to 4 dentin bonding strategies: Group 1 (co-monomers to ethanol on ratio 1:1) and Group 2 (co-monomers to ethanol on ratio 1:2): Experimental adhesives applied in accordance with the simplified ethanol-wet bonding technique; Group 3: One-Step Plus (OSP) applied in accordance with the simplified ethanol-wet bonding technique; Group 4: OSP applied following manufacturers instructions. Bonded specimens were sectioned in 1-mm-thick slices and the push-out test was performed. Representative specimens were selected for ultrastructural examination. No statistical differences in push-out bond strength were found among the tested bonding strategies (p>0.05). The major failure pattern was between the post and the luting cement. From this study the ethanol technique should be considered as a promising approach in the luting of fiber posts into the root canal due to the possible benefits of highly hydrophobic resins. Further studies are needed to validate the use of the ethanol-wet bonding technique when luting a fiber post.
Harrison-Snyder, Jill Elizabeth. "Pink Lines and Yellow Tables: A Production of Charles L. Mee's BIG LOVE." Master's thesis, Temple University Libraries, 2011. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/208821.
Повний текст джерелаM.F.A.
A dramatic analysis and directorial reflection on Temple Theaters' production of Charles L. Mee's BIG LOVE, a modern rendering of Aeschylus' THE SUPPLIANT WOMEN. This thesis explores the entire process of directing the production, from research and text analysis, to visual collaboration and rendering, to casting and rehearsal, to tech and production. Ultimately, it is the author's intention to reveal a specific directorial perspective of BIG LOVE and the corresponding creative process utilized to render this interpretation.
Temple University--Theses
Carreras, Ubach Ricard. "The cognitive bias test as a measure of emotional state in pigs." Doctoral thesis, Universitat Autònoma de Barcelona, 2016. http://hdl.handle.net/10803/392711.
Повний текст джерелаThe assessment of animal emotions is a crucial goal in the study of animal welfare science. The cognitive bias (CB) test has been proposed as a measure to assess the valence (positive vs. negative) and the intensity of animal emotions and is based on the premise that subjects in negative emotional state will judge an ambiguous stimulus more negatively than subjects in positive emotional state. The aims of our first study were to assess the applicability and the consistency of the CB test (CBT) in pigs. Our results showed that pigs were able to learn the spatial discrimination task necessary to subsequently perform the CBT. However, there was lack of consistency between the responses of the CBT performed twice, leaving 5 weeks between them. This result suggests that pigs changed the perception of the ambiguous stimulus due to its ability to remember the outcome of the ambiguous stimulus during the second CBT or due to uncontrolled factors such as their age or hunger state over time. The aims of our second study were 1) to assess the effect of the gender and the halothane genotype on CB (using the CBT) and on the level of fear (using a novel object test, NOT), 2) to assess the relationship between the CB and the level of fear and 3) contrast the results of the CBT and the NOT with the concentrations of several brain neurotransmitters. No differences were found between genders and genotypes regarding the CB and regarding the level of fear but a positive correlation was found between the CBT and the NOT results, suggesting that fear plays an important role in the decision taken by the pig dealing with ambiguous stimuli. Moreover, more fearful pigs had lower concentration of dopamine on the prefrontal cortex, supporting the relationship between this neurotransmitter and the fear response. The aims of the third study were 1) to assess the effect of handling on the CB (assessed by a CBT), on the fear (assessed by NOT) and on the defence cascade response (assessed by the defence cascade test; DCT), 2) to assess the effect of handling on serum, saliva and hair cortisol concentration and 3) to assess the relationship between behavioural tests (CBT, NOT and DCT) and between these tests and cortisol concentrations. No differences between positive and negative handling were found regarding the behavioural tests and cortisol concentrations, suggesting that the handling treatment carried out was not powerful enough to induce such differences or that the measures used were not valid or not sensitive enough to assess such differences. Nevertheless, positive correlations were found between behavioural tests supporting that individual factors such as the fear level, the motivation or the coping style had an effect on pigs’ affective state. The fourth study carried out was aimed to assess the effect of housing conditions on the CBT, on the qualitative behaviour assessment (QBA), on the serum cortisol concentration and on the number of wounds on pigs’ carcass. The results showed that pigs raised in enriched housing conditions had better QBA scores, lower serum cortisol concentration and lower number of carcass lesions than pigs raised in barren housing conditions. However, the results of the CBT did not showed those differences suggesting that the test is not valid or not sufficiently sensitive to detect emotional variation in those pigs. In conclusion, is feasible to apply the CBT in pigs, as they performed correctly the required learning process, however, the test showed no consistency and no validity questioning its utility to assess the emotional state in pigs.
Orr, Michael Romanoff. "Solidification Cracking Performance and Metallurgical Analysis of Filler Metal 82." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1470067177.
Повний текст джерелаSchreibeis, Amanda Danielle. "Cross Sensitization of Depressive-Like Behavior through Two Depression Related Paradigms: Maternal Separation and Its Effect on the Forced Swim Test In the Guinea Pig." Wright State University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=wright1484638271891606.
Повний текст джерелаSales, Marcel Willian Reis. "Conector de cisalhamento tipo pino com cabeça para viga mista aço-concreto com laje alveolar." Universidade Federal de Goiás, 2014. http://repositorio.bc.ufg.br/tede/handle/tede/4382.
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES
Composite beams of steel and concrete are studied for some time. The mechanism of transfer of longitudinal shear stresses on the interface between the beam and the slab usually occurs by means of shear connectors. In this case, the set of two materials behavior depends on the strength and rigidity of the connector on the interface, being well known for connectors with pin-type head associated with massive concrete slab. However, there is little information on shear connectors with pin-type head associated with hollowcore slab concrete. This study aims to determine, by means of direct shear tests, the resistance of connectors with pin-type head when associated with cellular slab and precast concrete presence of cover concrete. Hollow core slabs are analyzed with two different heights and concrete cover of 40 mm in thickness. Is also varied the strength of concrete fill and rate of shear reinforcement at the link. The results are compared with normative prescriptions and suggestions for other jobs. At the end, we propose the modification of an expression commonly used to evaluate the resistance of stud bolt and alveolar slab so as to adapt it to the situation of cellular concrete slab with hood.
As vigas mistas de aço e concreto são estudadas há bastante tempo. O mecanismo de transferência de tensões de cisalhamento longitudinais pela interface entre a viga e a laje normalmente se dá por meio de conectores de cisalhamento. Nesse caso, o comportamento conjunto dos dois materiais depende da resistência e da rigidez do conector na interface, sendo bem conhecido para os conectores do tipo pino com cabeça associados com laje maciça de concreto. Entretanto, há pouca informação sobre conectores de cisalhamento do tipo pino com cabeça associados com laje alveolar de concreto pré-moldado. Este trabalho tem por objetivo determinar, por meio de ensaios de cisalhamento direto, a resistência de conectores do tipo pino com cabeça quando associados com laje alveolar de concreto pré-moldado e presença de capa de concreto. São analisadas lajes alveolares com duas alturas diferentes e capa de concreto de 40 mm de espessura. Também é variada a resistência do concreto de preenchimento e a taxa de armadura transversal à ligação. Os resultados são comparados com prescrições normativas e sugestões de outros trabalhos. Ao final, é proposta a modificação de uma expressão normalmente utilizada para avaliar a resistência do conector tipo pino com cabeça e laje alveolar de modo a adequá-la à situação de laje alveolar com capa de concreto.
Vidal, Marjorie. "Optimisation des stratégies d'amélioration génétique du pin maritime grâce à l'utilisation de marqueurs moléculaires." Thesis, Bordeaux, 2016. http://www.theses.fr/2016BORD0044/document.
Повний текст джерелаMaritime pine (Pinus pinaster Ait.) is one of the main economical forest species in France, providing about twenty five percent of the national round wood production. A breeding program, implemented since the 60’s, offers genetically improved varieties for growth and stem straightness.This PhD explores the use of molecular markers in breeding strategies for maritime pine in Aquitaine. Molecular markers were used for pedigree recovery in a polycross progeny trial to test assumptions of backward selection on one hand, and to evaluate the feasibility of a new breeding strategy on the other hand. First, the pedigree of 984 progeny was recovered with 63 SNPs allowing to verify the assumptions of backward selection. We also showed that genetic parameters and maternal breeding value estimates were not much modified by inclusion of full pedigree information. Then, the best progenies in the polycross trial were preselected and genotyped to investigate the possibility of carrying out a forward selection strategy. Finally, establishment of clonal seed orchards were simulated from various breeding strategies (backward, forward, mixed) in order to compare genetic gains from the improved varieties obtained thereby.This study opens new perspectives towards an implementation of forward selection in the French maritime pine breeding program, to speed the selection cycles up and to increase the frequency of variety renewal. Moreover, the set of SNP markers developed is now used in different steps of the breeding program
Machado, José Arimatéia Rabelo. "Viabilidade técnica e econômica da conservação e uso da Araucaria angustifolia (Bert.) O. Ktze em teste de procedências e progênies." Universidade Estadual Paulista (UNESP), 2018. http://hdl.handle.net/11449/157229.
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Araucaria angustifolia (Bertol.) O. Kuntze ou pinheiro-do-paraná é uma espécie florestal fornecedora de madeira valiosa e sementes de alto valor nutritivo, mas considerada em risco de extinção. A manutenção de plantios com a finalidade de conservação da espécie é uma estratégia complementar para reduzir a possibilidade de erosão genética em seu habitat natural. Assim, este trabalho teve por objetivo avaliar a viabilidade técnica e econômica da conservação genética da Araucaria angustifolia a partir de um teste de procedências e progênies, que será transformado em uma área de produção de sementes, com a finalidade de manter uma representação da base genética da espécie e fornecer material genético de qualidade para fins de produção de madeira e sementes. Estabeleceu-se o experimento em abril de 1982, na Estação Experimental de Itapeva, do Instituto Florestal, no Estado de São Paulo. O delineamento experimental adotado foi em blocos de famílias compactas com três repetições, cinco procedências (parcelas), 14 a 26 progênies/procedência (subparcelas), 10 plantas por subparcela e espaçamento de 3,0 x 2,0 metros. Avaliou-se o experimento aos 33 anos de idade tendo sido considerado os seguintes caracteres: sobrevivência (%), altura total (m), diâmetro à altura do peito (DAP, cm) e volume (m³). A análise genético-estatística do experimento com o auxílio do software Selegen estimou os parâmetros genéticos, conforme a metodologia do modelo linear misto univariado aditivo REML/BLUP (Restricted maximum likelihood/Best linear unbiased prediction). A viabilidade econômica foi avaliada a partir dos cenários de produção e manejo, obtidos com o auxílio do software SISAraucaria, e da estimação dos parâmetros econômicos pelo software Planin. Os parâmetros genéticos indicaram boas condições tanto para a conservação quanto para o melhoramento, sugerindo haver viabilidade técnica para a transformação do teste em uma área de produção de sementes. Os parâmetros econômicos indicaram viabilidade da conservação, com a exploração da madeira, apesar do baixo crescimento e manejo inadequado do experimento. A exploração conjunta de madeira e pinhão se revelou uma estratégia altamente rentável, viável e recomendável, considerando os parâmetros econômicos estimados. A produção de sementes com qualidade genética superior poderá subsidiar novos plantios com maior produtividade do que à encontrada na população atual. Conclui-se que a conservação genética da araucária pelo uso é uma estratégia de conservação ex situ viável técnica e economicamente.
Araucaria angustifolia (Bertol.) O. Kuntze is a kind forest species supplier wooden valuable and seeds of recognized nutritional value, however considered threatened on extinction. Plantations maintenance with species conservation purpose is a complementary strategy to reduce genetic erosion in natural areas. So, the aim of this work was to evaluate technical and economic viability of Araucaria angustifolia genetic conservation by the use. The analyzed provenance and progeny test was established in 1982 at Itapeva Experimental Station – São Paulo State, from Forestry Institute, following a compact family blocks design with 110 open-pollinated progenies, from five natural populations, three replicates, ten plants per subplot, spaced from 3,0 x 2,0 meters. At age 33 the trial was measured for following traits: total height, diameter at breast height (DBH), wood volume and survival. The variance components and genetic parameters estimates were performed by REML/BLUP methods (Restricted maximum likelihood/Best linear unbiased prediction) using Selegen software. The production and management scenarios were obtained by using SisAraucaria software. Sensitivity analysis and economic parameters estimates were obtained through several methods of economic evaluation using the Planin software. In general, genetic parameters indicated that the evaluated population has enough variability for both conservation and breeding, and it suggests a technical viability use in seedling seed orchard. The economic parameters indicated viability of conservation with wood exploitation, despite the low growth and the inadequate trial management. Exploitation of both: wood and seeds has proved to be a highly profitable, viable and recommended strategy facing the excellent estimates of economic parameters. The production of seeds with genetic quality may also support new plantations with higher productivity than those from current population. In conclusion, the araucaria genetic conservation by use is an technically and economic viable ex situ conservation strategy.
Mets, Berend. "Lignocaine extraction ratio and clearance as an indicator of hypoxic hepatic injury : a study using the in situ and the isolated perfused pig liver." Doctoral thesis, University of Cape Town, 1992. http://hdl.handle.net/11427/27152.
Повний текст джерелаSilva, Camila Cristina Machado da. "Desenvolvimento e teste de protótipos de brincos para identificação eletrônica em suínos." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/74/74131/tde-11052011-103708/.
Повний текст джерелаIs the more relevant subject in tariffs around the world, where the need for food safety and consumer concern about the product consumed leading to the vision of the need to ensure the health, quality and origin of the product. With increasing computing power at a cost flexible techniques of digital signal processing systems coupled to electronic instrumentation, come to shaping up the casting quality control and optimizing in animal production. Today a significant importance of electronic animal identification as a tool for the traceability of animal production, the objective of this project was to evaluate the electronic identification system with RFID technology for identification of pigs from the point of view electronics, such as livestock, evaluating the use of electronic identification devices, coupled to ear tags of different models, ease of application and remain in the animal. We used prototypes of 6 models of electronic ear tags, and checking the efficiency in the laboratory and in animals in the field. We have ear tags with excellent reading ability of data transmission, and the best models for the adaptation observed in animals at all stages of production, and that showed no falls, problems in animal behavior and welfare, and poorly healing were the model 4 and 5. With this result we can verify the efficiency and consistency of data generated and the use of earrings in pigs. With the project it was possible to examine the viability of ear tags in swine, in a scientific manner and to provide a new product to market domestic pig, the ear tags in swine identification of in order to provide a new national product to market swine.
Růžička, Jakub. "Přizpůsobení ohřívatelného tribometrického nástroje pro sériové zkoušky." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-231040.
Повний текст джерелаAndersson, Simon. "Pellet production of Sicklebush, Pigeon Pea, and Pine in Zambia : Pilot Study and Full Scale Tests to Evaluate Pellet Quality and Press Configurations." Thesis, Karlstads universitet, Institutionen för miljö- och livsvetenskaper, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-55393.
Повний текст джерелаAguilar, Louie. "Effect of Interstitial Elements on the Weldability of Ni-base Alloys." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1563367451520424.
Повний текст джерелаSilva, Luciana Mendonça da. "Resistência da união da cimentação adesiva de pinos de fibra de vidro frente ao teste de remoção por extrusão." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/25/25131/tde-29052009-100558/.
Повний текст джерелаThis work evaluated the bond strength of glass fiber posts to dentin using a conventional and a self-adhesive resin cement. Thirty bovine incisors had their roots sectioned 17mm from their apices, endodontically treated and assigned into 3 groups (n=10): group 1, conventional resin cement RelyX ARC + ScotchBond Multi Purpose Plus (SBMP) light activated + glass fiber post; Group 2, RelyX ARC+ SBMP chemically activated + glass fiber post; Group 3, self-adhesive resin cement RelyX U100 + glass fiber post. After luting, specimens were stored for 24 hours in distilled water at 37oC. Roots were sliced under water irrigation to obtain 1mm thick slices. Push-out test was performed on each slice with a universal testing machine with a crosshead speed of 0,5mm/min. All fractured specimens were observed using a light microscope to identify modes of failure. Values were submitted to two-way ANOVA and Tukeys test (p0,05). Mean values (MPa) and standard deviation for groups 1, 2 and 3 were, respectively: 4.87 (±3.65); 5.89(±3.72); e 8.50(±4.52). Regional bond strength values for the cervical, medium and apical were: G1- 5.26(±3.44); 5.11(±3.33); 5.01(±3.17); G2- 7.45(±3.82); 5.88(±2.50); 4.91(±2.74); G3- 10.11(±3.11); 9.12(±3.70); 4.99(±3.28). The highest bond strength values were obtained using the self-adhesive cement. Regional bond strengths were similar in the cervical and medium region in groups 2 and 3. All cements had the same performance on the apical region. Bond strength was influenced by the type of cement used and radicular region, but was not altered by the activation mode of the bonding system.
Lima, Gerson Silva de. "Padroniza??o de um Teste de Soroaglutina??o Macrosc?pica para Diagn?stico da Leptospirose em Su?nos." Universidade Federal Rural do Rio de Janeiro, 2008. https://tede.ufrrj.br/jspui/handle/tede/871.
Повний текст джерелаLeptospirosis is considered a global health problem in human and veterinary medicine. It is a zoonotic disease caused by bacteria of the genus Leptospira, prevalent on every continent. The development of an effective macroscopic serum agglutination test against leptospirosis is justified, since the available ones are expensive, cumbersome and restricted to specialized laboratories. In Brazil, leptospirosis in pigs has been a major cause of reproductive failure in several states, mainly in the south and southeast regions of the country. Among the animals used in production of rural ecosystems, pigs have the most frequent clinical manifestations in the reproductive sphere with abortions, usually in the final third of pregnancy. Infertility, sterility or birth of debilitated or dead pigs which dies in the first days of life are signs of the presence of the bacteria in the breeding matrix. In the present study, six suspensions formulations of antigenic serovars pomona, icterohaemorrhagiae and copenhageni were used in single suspension form or in two serovars combinations. These were tested against pig serum with no clinical suspicion of leptospirosis compared with the microscopic agglutination test that is accepted as the gold standard by the World Health Organization (WHO). Among the six proposed suspensions the combination of serovars pomona + icterohaemorrhagiae showed the best result. The results demonstrates a percentage of 89% sensitivity and specificity of 89% for the suspension with the serovars combination of pomona + icterohaemorrhagiae and 87% for positive predictive value and 90% negative predictive value for the same combination, demonstrated by the statistics methods such as Chi-square, Kappa and Linear Logistic Model. Given the importance of leptospirosis in pigs and economic impact that it causes worldwide, in addition to the lack of current information, this study aimed to develop a screening rapid test for the diagnosis of pigs kept in variable dimension farms from rural regions of the Rio de Janeiro state.
A leptospirose ? considerada um problema global de sa?de na ?rea humana e veterin?ria. ? uma zoonose causada por bact?rias do g?nero Leptospira, prevalente em todos os continentes. O desenvolvimento de um teste de soro aglutina??o macrosc?pica eficaz contra a leptospirose se justifica, j? que os existentes s?o caros, trabalhosos e restritos a laborat?rios especializados. No Brasil, a leptospirose em su?nos tem sido uma das principais causas de falhas reprodutivas em v?rios estados, principalmente nas regi?es sul e sudeste do pa?s. Dentre os animais de produ??o explorados em ecossistemas rurais os su?nos apresentam as manifesta??es cl?nicas mais freq?entes na esfera reprodutiva com abortamentos, usualmente no ter?o final da gesta??o. A infertilidade, a esterilidade o nascimento de leit?es debilitados que morrem nos primeiros dias de vida s?o sinais da presen?a da bact?ria nas matrizes reprodutoras. No presente estudo, utilizou-se seis formula??es de suspens?es antig?nicas dos sorovares pomona, icterohaemorrhagiae e copenhageni em forma de suspens?o ?nica ou em combina??es de dois sorovares. Foram testadas frente a soros de su?nos sem suspeita cl?nica de leptospirose comparando com a soroaglutina??o microsc?pica que ? o teste aceito como padr?o ouro pela Organiza??o Mundial de Sa?de (OMS). Dentre as seis suspens?es propostas a combina??o dos sorovares pomona + icterohaemorrhagiae apresentou o melhor resultado. Os resultados obtidos demonstraram um percentual de 89% de sensibilidade e 89% de especificidade para a suspens?o com a combina??o dos sorovares pomona + icterohaemorrhagiae e de 87% de valor preditivo positivo e 90% de valor preditivo negativo para a mesma combina??o, comprovado pelos m?todos estat?sticos Qui-quadrado, Kappa e Modelo Linear Log?stico. Dada ? import?ncia da leptospirose em su?nos e o impacto econ?mico que causa mundialmente, al?m da car?ncia de informa??es atuais, este trabalho teve por objetivo desenvolver um teste r?pido de triagem para diagn?stico em su?nos mantidos em cria??es rurais de diferentes regi?es e tamanhos no Estado do Rio de Janeiro.
Figueiredo, Mariana Diehl [UNESP]. "Influência de soluções irrigadoras na resistência adesiva de pinos de fibra de vidro utilizando cimento resinoso: avaliação através do teste de push-out." Universidade Estadual Paulista (UNESP), 2011. http://hdl.handle.net/11449/90376.
Повний текст джерелаCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Atualmente, os pinos de fibra de vidro têm surgido como uma alternativa para restaurar dentes tratados endodonticamente. Entretanto, a perda da retenção do pino é uma das principais causas de falhas. Portanto, o objetivo deste estudo foi avaliar a resistência de união e o tipo de falha adesiva, em diferentes regiões da raiz, de pinos de fibra de vidro transparente cimentados no canal radicular com cimento de cura dual, variando-se a solução irrigadora utilizada durante o preparo dos canais, através do teste de push-out. Para o estudo, foram utilizados 30 dentes humanos, todos igualmente preparados. No momento da cimentação dos pinos, as soluções irrigadoras foram: solução de soro fisiológico, hipoclorito de sódio 2,5% e solução de clorexidina 2%; e o cimento resinoso utilizado foi de cura dual. Após a cimentação, os espécimes foram seccionados, obtendo-se 2 fatias de aproximadamente 2 mm cada, suas faces cervicais foram marcadas, e então, submetidas ao teste de push-out. Foram realizados os testes ANOVA e Tukey, com nível de significância de 5 %, para a análise do ensaio mecânico e realizada análise qualitativa do tipo de falha ocorrida. Pôde-se observar que o grupo irrigado com hipoclorito de sódio 2,5% apresentou menor valor da média de resistência adesiva (3,870 ± 3,799 MPa), comparado com o grupo da clorexidina 2% (4,215 ± 2,098 MPa) e com o grupo do soro (4,510 ± 1,186 MPa). Já em relação aos terços, a região média foi a que apresentou maior valor da média de resistência adesiva (4,803 ± 3,14 MPa) quando comparado com a região cervical (3,593 ± 1,717 MPa), porém não houve diferença estatística significante, nem entre as regiões e nem entre as soluções irrigadoras. A maioria das falhas ocorridas foram do tipo adesiva 70%, enquanto que 23,33% foram fraturas coesivas, e 6,66% foram do tipo mistas. Assim, é possível concluir que os...
Currently, the fiberglass posts have emerged as an alternative to restore endodontically treated teeth. However, the loss of retention of the pin is a major cause of failure. Therefore, the aim of this study was to evaluate and compare the bond strength of transparent fiberglass posts, using a dual cure cement, varying the irrigating solution used during the preparation of the root canals through the push-out test and then a qualitative analysis of types of adhesion failures was made by reading into a stereomicroscope. For the study, 30 human teeth were used, all equally prepared. At the time of cementation of the posts, the irrigating solutions were: normal saline solution, sodium hypochlorite 2.5%, and 2% chlorhexidine solution, and the resin cement used was dual-curing. After cementation, specimens were sectioned, yielding two slices of about 2 mm each, their cervical faces were marked, and then subjected to push-out test, the data obtained were analyzed by descriptive and inferential statistics. The tests performed were ANOVA and Tukey, with a significance level of 5% for the analysis of mechanical test, and the type of failure occurred was qualitatively evaluated. It could be observed that the group irrigated with sodium hypochlorite 2.5% showed the lowest mean bond strength (3.870 ± 3.799 MPa), compared with 2% chlorhexidine group (4.215 ± 2.098 MPa) and the normal saline solution group (4.510 ± 1.186 MPa). In relation to the thirds, the middle region showed the highest value of bond strength average (4.803 ± 3.14 MPa) compared with the cervical (3.593 ± 1.717 MPa), but differences were not statistically significant, nor between regions nor between irrigating solutions. Most failures were adhesive type 70%, while 23.33% were cohesive fractures, and 6.66% were mixed type. Thus, we conclude that the irrigation protocols evaluated in this study did not exert effects on the bond ... (Complete abstract click electronic access below)
Figueiredo, Mariana Diehl. "Influência de soluções irrigadoras na resistência adesiva de pinos de fibra de vidro utilizando cimento resinoso : avaliação através do teste de push-out /." São José dos Campos : [s.n.], 2011. http://hdl.handle.net/11449/90376.
Повний текст джерелаBanca: Renato Miotto Palo
Banca: Márcia Carneiro Valera
Resumo: Atualmente, os pinos de fibra de vidro têm surgido como uma alternativa para restaurar dentes tratados endodonticamente. Entretanto, a perda da retenção do pino é uma das principais causas de falhas. Portanto, o objetivo deste estudo foi avaliar a resistência de união e o tipo de falha adesiva, em diferentes regiões da raiz, de pinos de fibra de vidro transparente cimentados no canal radicular com cimento de cura dual, variando-se a solução irrigadora utilizada durante o preparo dos canais, através do teste de push-out. Para o estudo, foram utilizados 30 dentes humanos, todos igualmente preparados. No momento da cimentação dos pinos, as soluções irrigadoras foram: solução de soro fisiológico, hipoclorito de sódio 2,5% e solução de clorexidina 2%; e o cimento resinoso utilizado foi de cura dual. Após a cimentação, os espécimes foram seccionados, obtendo-se 2 fatias de aproximadamente 2 mm cada, suas faces cervicais foram marcadas, e então, submetidas ao teste de push-out. Foram realizados os testes ANOVA e Tukey, com nível de significância de 5 %, para a análise do ensaio mecânico e realizada análise qualitativa do tipo de falha ocorrida. Pôde-se observar que o grupo irrigado com hipoclorito de sódio 2,5% apresentou menor valor da média de resistência adesiva (3,870 ± 3,799 MPa), comparado com o grupo da clorexidina 2% (4,215 ± 2,098 MPa) e com o grupo do soro (4,510 ± 1,186 MPa). Já em relação aos terços, a região média foi a que apresentou maior valor da média de resistência adesiva (4,803 ± 3,14 MPa) quando comparado com a região cervical (3,593 ± 1,717 MPa), porém não houve diferença estatística significante, nem entre as regiões e nem entre as soluções irrigadoras. A maioria das falhas ocorridas foram do tipo adesiva 70%, enquanto que 23,33% foram fraturas coesivas, e 6,66% foram do tipo mistas. Assim, é possível concluir que os ... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: Currently, the fiberglass posts have emerged as an alternative to restore endodontically treated teeth. However, the loss of retention of the pin is a major cause of failure. Therefore, the aim of this study was to evaluate and compare the bond strength of transparent fiberglass posts, using a dual cure cement, varying the irrigating solution used during the preparation of the root canals through the push-out test and then a qualitative analysis of types of adhesion failures was made by reading into a stereomicroscope. For the study, 30 human teeth were used, all equally prepared. At the time of cementation of the posts, the irrigating solutions were: normal saline solution, sodium hypochlorite 2.5%, and 2% chlorhexidine solution, and the resin cement used was dual-curing. After cementation, specimens were sectioned, yielding two slices of about 2 mm each, their cervical faces were marked, and then subjected to push-out test, the data obtained were analyzed by descriptive and inferential statistics. The tests performed were ANOVA and Tukey, with a significance level of 5% for the analysis of mechanical test, and the type of failure occurred was qualitatively evaluated. It could be observed that the group irrigated with sodium hypochlorite 2.5% showed the lowest mean bond strength (3.870 ± 3.799 MPa), compared with 2% chlorhexidine group (4.215 ± 2.098 MPa) and the normal saline solution group (4.510 ± 1.186 MPa). In relation to the thirds, the middle region showed the highest value of bond strength average (4.803 ± 3.14 MPa) compared with the cervical (3.593 ± 1.717 MPa), but differences were not statistically significant, nor between regions nor between irrigating solutions. Most failures were adhesive type 70%, while 23.33% were cohesive fractures, and 6.66% were mixed type. Thus, we conclude that the irrigation protocols evaluated in this study did not exert effects on the bond ... (Complete abstract click electronic access below)
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Suh, Sanghyun. "Weldability Evaluation in Autogenous Welds of Alloys 230, 800H, and 825." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1471581194.
Повний текст джерелаChidoski, Filho Julio Cezar. "Influência de técnica restauradora alternativa com diferentes tipos de resina composta para reforço radicular em raízes enfraquecidas." Universidade Estadual de Ponta Grossa, 2018. http://tede2.uepg.br/jspui/handle/prefix/2585.
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Avaliou-se a influência do tipo e viscosidade da resina composta utilizada para reforço radicular (RR) em dentes com canais radiculares excessivamente alargados na adesão de pinos de fibra de vidro (PFV) ao canal radicular. Foram selecionados 78 dentes permanentes unirradiculares, os quais tiveram suas coroas removidas e suas raízes tratadas endodonticamente. Após uma semana, foi realizado o preparo dos condutos para posterior RR. Nesse momento, as raízes foram aletoriamente divididas em 6 grupos (n=13), sendo um grupo controle positivo (GCP – em que os canais não estavam alargados), um grupo controle negativo (GCN – em que os canais estavam alargados, porém sem RR), e 4 grupos de RR dos canais alargados de acordo com a combinação dos seguintes fatores: tipo de resina composta: bulk ou convencional e viscosidade da resina composta: fluida ou regular. Após a cimentação dos PFV, para cada raiz foram obtidas seis fatias (duas representativas de cada região radicular - terço coronário, médio e apical). Em seguida, para cada grupo, 7 raízes foram avaliados em resistência de união (RU) pelo teste de push-out, 6 raízes foram avaliados em nanoinfiltração (NI) e microdureza Vickers. Os dados obtidos de RU e NI foram submetidos a ANOVA dois fatores (grupo experimental vs região radicular) e Tukey (α=0,05), e de microdureza a ANOVA um fator e Tukey para cada grupo experimental (α= 0,05). Os grupos de RR com as resinas tipo bulk em ambas as viscosidades apresentaram resultados de adesão superiores estatisticamente ao GCN em todas as regiões radiculares (maior RU e menor NI). Pode-se concluir que a técnica de reforço radicular com resinas composta do tipo bulk, tanto com viscosidade regular quanto com viscosidade fluida, pode ser uma técnica alternativa interessante previamente à cimentação de PFV em raízes enfraquecidas com canais radiculares alargados.
The influence of the type and viscosity of the composite resin used for root reinforcement (RR) was evaluated in teeth with excessively wide root canals in the adhesion of glass fiber post (GFP) to the root canal. It was selected 78 uniradicular permanent teeth, which had their crowns removed and their roots treated endodontically. After one week, the conduits were prepared for later RR. At that time, the roots were randomly divided into 6 groups (n = 13): positive control group (PCG - where the root canals were not enlarged), negative control group (NCG - where the root canals were widened - but without RR), and 4 groups of RR of the widened root canals according to the combination of the following factors: type of composite resin: bulk or conventional and viscosity of composite resin: flow or regular. After the cementation of the GFP, six slices were obtained for each root (two representatives of each root region - coronary, middle and apical third). Then, for each group, 7 teeth were evaluated in bond strength (BS) by the push-out test, 6 teeth were evaluated in nanoleakage (NL) and Vickers microhardness (VHN). The data obtained from BS and NL were submitted to two-way ANOVA (experimental group vs root region) and Tukey (α = 0.05), and from VHN to one-way ANOVA and Tukey for each experimental group (α = 0.05). The RR groups with bulk composite resins at both viscosities showed statistically superior adhesion results to GCN in all root regions (higher BS and lower NL). It can be concluded that the radicular reinforcement technique with bulk composite resins, both with regular and flow viscosities, may be an interesting alternative technique prior to the GFP cementation in weakened roots with widened root canals.
Neto, Tatiany de Mendonça. "Avaliação da resistência adesiva, por meio do teste de microtração, da interface pino de fibras de vidro / cimento / dentina radicular variando-se cimentos, adevivos dentinários e tempo de armazenamento." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/25/25135/tde-09112007-145259/.
Повний текст джерелаThis study evaluated the microtensile bond strengths of the fiber post-resin / resin cement/ root dentin when were varied the resin cement, dentin bonding system and longterm water storage. Were used for this study, human canines teeth extracted for periodontal reasons. The crown was sectioned and root canals were prepared for fiber post-resin (Fibrekor). The teeth were randomly assigned into experimental groups (n = 10) when were varied the resin luting technique and term water storage. The resin cements were (1) Panavia F, (2) Variolink II, (3) Enforce mediated by their respective adhesives. Experimental groups, using Panavia F and Enforce, were prepared in the same way, except that the additional layer of a low-viscosity bonding resin (Scotchbond Multi-Purpose Plus [SBMP]) was placed on the bonded root dentin surface before luting the fiber post-resin. The teeth were stored for 3 months and subsequently prepared for microtensile bond strength testing. Beams of approximately 1mm2 were tested in tension at 0,5mm/mim in a universal testing machine. Fractured surfaces were examined under X 40 stereomicroscope to determine the mode of fracture. The data were divided into cervical, middle and apical regions and analyzed using ANOVA and Tukey\'s test (p < 0,05). The results of tensile bonding strengths showed (1) significant differences among resin cements and root dentin regions, were presented higher mean bond strength values to Variolink II, when compared with others; (2) the cervical third of Variolink II demonstrated higher values, to Panavia F and Enforce demonstrated lower values for that regions; (3) the application of the additional layer of the hydrophobic adhesive resulted in significant improved in the tensile bonding strength; (4) water storage for 3 months produced bond strengths that were significant lower for Variolink II e Enforce; (5) after storage, the Variolink II reduced bond strengths in the cervical third and Enforce in the middle and apical regions. The cervical and middle third of Panavia F presented higher mean bond strength values and apical regions demonstrated lower values; (6) No cohesive fractures within resin cement, fiber-reinforced composite resin post, or root dentin were identified.
Evans, William Charles. "Advancements in Joining Armor Grade Steels." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1556816907125644.
Повний текст джерелаSkogsfjord, Michael, and Minna Blom. "Naturliga filtermaterial för reduktion av metaller i dagvatten." Thesis, Mälardalen University, Mälardalen University, Department of Public Technology, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-4301.
Повний текст джерелаFörorenat dagvatten från Stena Gotthards metallåtervinningsanläggning i Eskilstuna har filtrerats genom kolonner innehållande två olika adsorbenter, torv och furubarksflis. Torv är en organisk jordart som främst används som bränsle och furubarksflis är en biprodukt från skogsindustrin. Båda filtermaterialen är relativt billiga och finns i stora kvantiteter i Sverige. Filtermaterialen har visat sig ha varierande kapacitet att adsorbera metaller i vatten på grund av själva materialet samt vattnets sammansättning. Resultatet från den här studien visar att av de två undersökta filtermaterialen så har furubarksflis störst kapacitet att reducera bly, koppar och zink från det specifika dag vattnet.
Polluted storm water from a metal recycling industry has been filtrated through columns that contained two different adsorbents, peat and pine bark. Peat is an organic soil, mainly used for energy production, and pine bark, a by-product from the forest industry. In Sweden, there are a lot of resources of peat as well as pine bark. Used as filter materials, they are relatively cheep and, like other kinds of filtermaterial used as adsorbents, they have varied capacity to adsorb metals in water. The capacity for the filter materials to adsorb metals depends on the physical structure and chemical contents of the peat and pine bark as well as the water metal composition. Results from this study show that pine bark had the highest adsorption capacity to reduce copper, lead and zinc from the specific storm water.
Luskin, Timothy Clark. "Investigation of Weldability in High-Cr Ni-base Filler Metals." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1366210427.
Повний текст джерелаRakotoniaina, Volana Astérie. "Co-méthanisation des déchets fermiers et alimentaires : expérimentation et modélisation." Thesis, La Réunion, 2012. http://www.theses.fr/2012LARE0013/document.
Повний текст джерелаThe two main objectives of this thesis are to develop theoretical and experimental aspects of the anaerobic co-digestion of farm wastes associated with food. Our general studies have for objectives the elimination as much as possible the maximum of organic waste into non-hazardous landfills, reduce pollution of natural environments (water, soil, air) by the effluent livestock, sewage sludge, and dispose of energy via the produced biogas.Firstly, we carried out experiments on the anaerobic co-digestion of the liquid effluents association (pig slurry, sewage sludge, vinasse effluents) and the mixture of animal slurries, manures, and food waste. The aim of these experiments was to follow the evolution of the reactor behavior according to the component of the co-digested mixture.Secondly, BMP tests of mixture of association several types of organic waste under different physical condition (liquid, semi liquid, pasty, solid) were carried out. We have been tried to know, which proportion of each mono-substrate will give the best BMP among waste to mix? We used a statistical tool, the mixture design to define the mixtures to be tested. For a mixture with 3 components (cow dung, pig slurry, food waste), the optimum number of experiments to realize was 13.The realization of the mixture design, i.e. the experiment series on the anaerobic co-digestion of the 13 proposed mixtures enabled us to observe that the BMP of a mixture firstly depends on its texture (physical state) at the entry of the process. A mixture containing a maximum in proportion in liquid substrate (pig slurry) associated with food waste gave us the best biogas and methane potential. This observation was confirmed by the conversion rate of dry matter to volatile solid (VS) of the mixture. These results were proven by the activity (synergism, antagonism) of mixtures components influencing to BMP tests.The empiric law defined to predict the BMP of a mixture must to account the rate of VS/DM of a mixture, and the interactions between components of the mixture. This law must also include the positive effect (synergism) and negative (antagonism) between components of the mixture. This law has been defined in order to predict the potential methane mixtures of cow dung, pig slurry and food wastes and being within the experimental domain defined by the limits on minimum and maximum proportions of each component of the mixture. However, this definite law is applicable only to the mixtures of cow dung, pig slurry and food waste. The definite law is limited for prediction of mixtures BMP. However, this empiric law can not be used to follow reactor process. Model with three stages (hydrolysis of soluble substrate, acidogenic production stage and methanogenic stage) was used to predict daily and cumulative of biogas and methane production of anaerobic digestion of farm waste associated with vegetable waste. This model must be adapted with substrate type used and experimentations conditions (batch and mesophilic conditions). An adjustment of the model equations describing hydrolysis polymers stage was necessary in order to take into account of the concentration of polymers in particulate forms contained in complex substrates such as manure, slurry, and vegetable food waste. This adapted model was called model of Coupling. Indeed, a calibration of the most influential parameters of the model of Coupling, on the output must be carried out in order to validate the model.Daily and cumulative predictions of biogas and methane production of anaerobic digestion of farm waste associated with food waste were obtained by using adapted dynamical model. Model parameters values depend on the substrate type using in experimentation processes. Moreover, parameters values must be verified, needing further work
Blažek, Petr. "Analýza vybraného podniku." Master's thesis, Vysoké učení technické v Brně. Fakulta podnikatelská, 2013. http://www.nusl.cz/ntk/nusl-223992.
Повний текст джерелаBlom, Åsa, and Mikael Bergström. "Above Ground Durability of Swedish Softwood." Doctoral thesis, Växjö universitet, Institutionen för teknik och design, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:vxu:diva-395.
Повний текст джерелаFořt, Tomáš. "Charakterizace nanostruktur deponovaných PVD a CVD technologiemi." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2009. http://www.nusl.cz/ntk/nusl-233449.
Повний текст джерелаFarina, Ana Paula. "Estudo ex vivo da resistência de união de pinos de fibra às paredes do canal radicular utilizando diferentes cimentos." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/58/58131/tde-19022009-163351/.
Повний текст джерелаThe objective of this study was to evaluate ex vivo the Bond strength of glass-fiber posts (GF) and carbon-fiber posts (CF) to cervical, medium, and apical thirds of root canals after luting with two types of resinous cements: Self-adhesive (RX) and conventional (CP). Forty maxillary canines were divided into 4 groups (n=10) according to the luting cement and fiber post used. After roots were perpendicularly sectioned in 2mm-thick slices, bond strength teste (0.5mm/min) were perform in coronal, midlle and apical thirds. Five specimens were selected from each group for analysis in Scanning Electron Microscopy to observe the type of fracture. The data were analyzed by 2-way ANOVA (Bonferonis test, p<0.05). The results showed that highest bond strength values to GF, for both luting cements (RX and CP). Regard the type of luting cement, posts (GF and CF) luting with RX had the best performance (p<0.05) that CP. For all groups, bond strength values were higher at cervical third, followed by midlle and apical thirds. The failure analysis demonstrated a predominance of post-cohesive failure for RX, and dentin-adhesive-cement and mixed failure for CP. It was concluded that bond strength was affected by the type of fiber post and type of luting cement, where the highest bond strength values were showed by GF-post and RX-luting cement.
Lenzo, Jansen C. Lenzo. "Evaluation of the Effect of Tungsten and Boron Additions on the Microstructure and Solidification Cracking Susceptibility of Fe-Mn-C Filler Metals." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1470829433.
Повний текст джерелаNicklisch, Felix. "Ein Beitrag zum Einsatz von höherfesten Klebstoffen bei Holz-Glas-Verbundelementen." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-204784.
Повний текст джерелаWooden constructions are on the rise again – encouraged by a strong public and economic trend towards sustainable and resource efficient buildings. Spurred by this growing interest novel design principles and material assemblies in architecture and the building industry evolve. These developments require further research due to the absence of evaluation tools and insufficient knowledge about their design. Load-bearing timber-glass composite elements could contribute to a more efficient use of materials in façade constructions. In this case a linear adhesive bond connects the glass pane to the timber substructure. This enables an in-plane loading of the glass whose capacity is not used to its full potential in conventional façades as it is solely applied as an infill panel. The quality of the adhesive bond defines the characteristics and the performance of the whole structural component. Structural sealants such as silicones, which are typically used for the joint, provide a high flexibility and only a low load-bearing capacity. Considering such elements being part of a bracing system, the mentioned characteristics limit the application range to buildings with not more than two stories. This thesis widens the scope with an in-depth examination of high-modulus adhesives, which have not yet been evaluated for their use in building constructions. Timber-glass composite elements used as a bracing component in façades are the focus of this work. Neither the full structural component nor the adhesive have yet been included into German building standards. Hence it is essential to assess the general requirements of their application. The relevant aspects are clarified in the context of glass constructions. In addition to the scientific discussion of the results, this approach facilitates also a practical evaluation of the findings, which is a unique feature of this work. The deformability of the adhesive becomes a crucial criterion when selecting the individual materials and designing the timber-glass composite elements. A case study assesses the influence of the adhesive stiffness on the behavior of a single element and its interaction with other members of the structural system. Based on the results, three different stiffness classes are introduced to support the selection process of the adhesives to be examined in further investigations. The experimental part of this work is initiated by a comprehensive characterization of seven shortlisted adhesives. The results enable a further differentiation of suitable materials. Two adhesives qualified as suitable for the main experiments. A silicone adhesive complements the test series to serve as a reference material to the current practice. In the next phase attention is drawn to the ageing stability and on the time-dependent material behavior of the adhesives under long-term loading. Small-scale specimens made from adhesively joint timber and glass pieces are exposed to different ageing scenarios which relate to the impacts typically encountered in façades. Beyond that, creep tests are carried out on small and large shear specimen. The latter provide extra benefit as they comprise long linear adhesive joints resembling virtually the situation in a real-size element. A specific long-term test rig was developed for this purpose comprising a loading unit with gas pressurized springs. Based on the results it can be concluded that joints with adhesives of high and intermediate stiffness enable an increase of characteristic failure loads and a significant reduction of deformation. With the stiffer joint near-surface rupture of timber fibers becomes the prevailing failure mechanism. The timber strength limits further loading of the adhesive joint. However, ageing and creep testing reveal also shortcomings of the adhesives. Their application can only be recommended if redundant compensation measures are taken or the joint is protected against critical environmental impacts. Appropriate solutions are proposed with the final recommendations of this work. Methods and assessment tools that have been developed and tested for this work offer the possibility of a more straight-forward evaluation of further promising adhesives and their use in load-bearing timber-glass composites
Joly, Damien. "Usinabilité de la fonte à graphite vermiculaire." Thesis, Tours, 2010. http://www.theses.fr/2010TOUR4042/document.
Повний текст джерелаThis study deals with machinability of compacted graphite iron. This material is in-between grey cast iron and nodular cast iron due to the graphite particle shape. It is used for manufacturing diesel engine blocks so as to increase performances and reduce carbon emissions to comply with Euro 5 norm. It is necessary to compare one material to a reference material to evalute machinability criterium. In our case, compacted graphite iron has been compared to grey cast iron. Tensile tests have given us mechanical properties of our test pieces batch used for machining tests. It helped us to qualify the material in its own material range. Inserts have been characterized by nanoindentation. PVD and CVD coatings were benchmarked in microscratch way to determine their respective adhesion to theirs substrates A design of experiment has been setted up so as to reduce number of inserts protypes to be manufactured. Pin on disk tribologic tests gave few hints to have a better understanding of friction phenomena and wear during compacted graphite iron machining
Coyle, Shannon Jean. "Improving Accurate Diagnosis and Treatment for Acute Viral Conjunctivitis." UNF Digital Commons, 2014. https://digitalcommons.unf.edu/etd/526.
Повний текст джерелаDratnal, Lukáš. "Analýza vad typu nekovových vměstků v odlitcích hlav motorů a návrh metod jejich odstranění." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-241731.
Повний текст джерелаTománek, Jakub. "Testovací rozhraní integrovaných obvodů s malým počtem vývodů." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2017. http://www.nusl.cz/ntk/nusl-320175.
Повний текст джерела