Submitted by Almir Azevedo (barbio1313@gmail.com) on 2016-09-22T18:14:48Z No. of bitstreams: 0 / Made available in DSpace on 2016-09-22T18:14:48Z (GMT). No. of bitstreams: 0 Previous issue date: 2016-07 / O projeto e desenvolvimento de uma nova linha de feixe dotada de um sistema que viabilize a irradiação no Cíclotron CV-28 do Instituto de Engenharia Nuclear de alvos extensos e de geometria variável tornaram-se necessário para a realização de estudos e desenvolvimento de aplicações de técnicas nucleares e análises de materiais por ativação em condições de irradiação até então não disponíveis. Este sistema que poderá ser utilizado em irradiações com feixes de prótons, alfas, deutério e hélions (He3) a energias variáveis, é composto por dispositivos de: proteção, interceptação, colimação e medição da intensidade do feixe, de forma a possibilitar a realização de irradiações em condições controláveis e reprodutíveis. Para tanto, peças em alumínio e PVC-foram usinadas de forma a construir os componentes do sistema, notadamente colimadores com 13mm e 9mm de diâmetro, um dispositivo de colimação de quatro setores, um "beam stop", duas flanges de isolamento elétrico e um porta alvo (com janela degradadora). Identificou-se também a necessidade de se dotar o sistema aqui desenvolvido de um circuito de refrigeração próprio à água deionizada que é responsável pela refrigeração de todos os seus componentes que possam ter contato com o feixe. O sistema conta ainda com conexões para vácuo, que possibilitam fazer um pré-vácuo em sua câmara de irradiação, de forma que a mesma possa interligada a linha de transporte de feixe de Cíclotron CV-28, sem causar danos ao vácuo do mesmo. A condição para se fazer esta interligação é a obtenção de um pré-vácuo no ordem de 10-4 torr. Os resultados experimentais obtidos com a realização de irradiações de alvos metálicos especialmente desenvolvidos para testar o sistema, que é tema da presente dissertação, atestam a confiabilidade e reprodutibilidade das condições de irradiação, o que viabilizam o desenvolvimento e emprego de novas unidades de irradiação a serem incorporadas ao mesmo. Esse sistema de irradiação já está sendo utilizado na linha 2 do CV-28

The advancement in solar panel and battery technology makes them useful for energy supply and storage. This thesis involves the modeling and charging control of a lithium ion battery system for solar panels. The proposed model is based on the parameters and characteristics of a realistic battery and solar panel system; and the hybrid control approach combines the advantages of the adaptive incremental conductance method and the perturb and observe method to track the maximum power point of the solar panel for charging the battery unit. Computer simulation results demonstrate that this proposed approach offers a faster convergence rate than the adaptive incremental conductance method, and less steady-state error than the perturb and observe method.

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In this paper, I sought to identify and develop a protocol on electrode arrays as a result of rapid aging by applying rapid current over time. We, however, apply a different approach by using phosphate buffer solution (PBS) to mimic the conditions of the body. Here we have established an in vitro protocol for accelerated aging, a process that involves testing in extreme conditions such as oxygen, heat, sunlight, humidity, and vibration aimed at speeding the normal aging process of items; on commercially available shape memory polymer electrode arrays from Qualia over a period of 30 days in PBS. Two electrode arrays were placed in 37°C and 2 were placed in 57°C. Open lead electrochemical impedance spectroscopy (EIS) was conducted on the electrode arrays. Overall, the results showed there were differences in average impedance during this accelerated aging protocol. At 37°C we see that the average impedance values increased as the electrodes were aged at 1kHz from an average of 4.15E6 to 9.14E6 Ohms. At 57°C electrode arrays 4 and 5 showed strong P values well above 0.05, but average impedance increased drastically from 3.27E6 to 9.97E6 and P value of 0.04 from measurement day 24 to day 30. This indicated to us that the electrode could be experiencing some delamination. In addition, this could be because the Qualia nerve cuffs tested were "B" grade, so changes in impedance could be due to the integrity of the device. This would tell us that these electrode arrays would not be capable to withstand long – term recording for up to 240 days. As a result, rejecting the hypothesis that this protocol would show no change in impedance levels for a simulated aging period of 240 days. Although this protocol was not in a perfect setting and the quality of the electrodes were not up to standard, this gave us insight into the electrochemical properties of SMP electrodes which will be useful when we bio-fabricate our own electrodes to study gastrointestinal (GI) disorders.

Preliminary plots are required when beginning a cruise for a timber sale in order to get an idea of how much variation in volume exists within the sale area. This variation is known as the coefficient of variation (CV) and is subsequently used to estimate the number of plots needed to implement the cruise to a desired level of accuracy (allowable error). By looking at a large number of sale inventories and finding similarities among key attributes (trees per acre, diameter at breast height and an estimate of variance), two models were derived based on simple stand observations to aid field personnel in determining a more accurate estimate of the CV. Furthermore, the models estimate the number of 1/10 acre plots needed to sample a stand to within a ± 10% allowable error at the 90% confidence level for total tonnage.

Recently, scientific publishing has experienced an expansion of journals and publishers whose primary goal is profit and whose peer review process is virtually non-existent. These “predatory” or “opportunistic” journals pose a threat to the credibility and integrity of legitimate scientific literature, and quality science. Unfortunately, many scientists choose to publish in these journals and/or serve on their editorial boards, either due to ease of rapid publication or naivety. Here, we highlight the extensive use of predatory publications or editorial board involvement by applicants applying for a faculty position in the Pharmaceutical Sciences department at the Bill Gatton College of Pharmacy at East Tennessee State University. We caution search committees at other pharmacy schools to thoroughly examine applicant curricula vitarum (CVs) for predatory publishing.

Optical music recognition (OMR) is the field of study which seeks to use computer vision to extract musical information from images. Most OMR work focuses on music symbols (such as notes, time signatures, clefs, etc.); to date, only two prior works pay attention to chord symbols (shorthand notation commonly used in jazz and popular music lead sheets to describe the harmony of the music) in musical documents. Chord symbols lay the foundation for jazz improvisation - a sequence of chord symbols is repeated during the improvisatory section, and the soloist and accompaniment (primarily, though not exclusively) use the chord symbols to inform their choice of notes and rhythms. In order to enable downstream work on computer-based improvisation, this work seeks to identify chords and extract musical structure from images of lead sheets with chord symbols. We contribute two new datasets for the chord identification task; one of handwritten symbols collected from students at UCF, and the other of printed symbols, collected from five different real book documents. We also propose a baseline chord identification and localization technique, using an OMR + grammar + deep learning approach to identify chord symbols and their location in the musical document, and describe baseline results on the printed and handwritten datasets. We also describe an implementation of musical form reconstruction from a lead sheet image, as well as an evaluation approach using string similarity metrics.

The recruiter’s first impression of a candidate is often formed through the candidate’s CV, and the CV plays a vital role in recruitment processes for convincing the recruiter to proceed with an applicant to a first interview. Thus, it needs to catch the recruiter’s attention and show whether the candidate is an ideal match for what the recruiter is looking for. With the aim to explore web-based CVs with interactive elements and examine users’ habits and requirements in IT consultant recruitment processes, this study asks the question: How can the user experience of an interactive CV page be improved to help facilitate the recruitment process of consultants? By applying an iterative, user-centered design approach, utilizing the Constructive Design Research framework, the study results in a prototype and proposes design suggestions drawing on knowledge generated from the prototype. Further, three characteristics essential to improve the user experience and help facilitate the recruitment process of consultants are suggested. / En rekryterareres första intryck av en kandidat bildas ofta genom kandidatens CV. Vidare spelar CV:t en avgörande roll i rekryteringsprocesser för att övertyga rekryteraren att gå vidare med en kandidat till en första intervju. Detta innebär att ett CV måste fånga en rekryterares uppmärksamhet och visa huruvida kandidaten är en idealistisk match för det rekryteraren letar efter. I syfte att utforska webbaserade CV:n med interaktiva element och undersöka användares vanor och krav i rekryteringsprocesser för IT-konsulter, ställer denna studie forskningsfrågan: Hur kan användarupplevelsen av en interaktiv CV-sida förbättras för att underlätta i rekryteringsprocessen av konsulter? Genom att tillämpa en iterativ användarcentrerad designstrategi där konstruktiv designforskning tillämpas, resulterar studien i en prototyp och föreslår dessutom designförslag utifrån kunskap genererad från prototypen. Vidare föreslås av studien tre attribut som anses vara väsentliga för att förbättra användarupplevelsen och hjälpa till att underlätta rekryteringsprocessen av konsulter.

Dar destino adequado ao resíduo de casca de arroz e promover seu reúso é tarefa premente, em razão dos problemas gerados pelo descarte no ambiente ou uso indiscriminado na área agrícola, sem que se conheça sua influência na planta e no solo. Estudos sinalizam diversidade de usos da casca de arroz queimada. O resíduo contém alta concentração de silício (Si) e também outros nutrientes. Pesquisas com algumas culturas demonstram resposta positiva do uso de silício (Si) no controle de nematoides, patógeno que pode reduzir a produtividade e qualidade da cenoura (Daucus carota L.). Esta pesquisa foi realizada com o objetivo de conhecer a contribuição da casca de arroz queimada como alternativa à redução de danos por nematoides em cenoura e sua ação nos atributos químicos do solo. No primeiro capítulo avaliou-se o efeito da dose de casca de arroz queimada e do tempo de incubação sobre os atributos químicos do solo. No segundo capítulo avaliou-se o uso da casca de arroz queimada com diferentes tempos de incubação e do silicato de cálcio e magnésio nos atributos químicos do solo, concentração de nutrientes na cenoura, componentes da produção e produtividade de raízes. Os dois experimentos foram desenvolvidos em casa de vegetação no Departamento de Produção Vegetal da Esalq, Piracicaba/SP. No primeiro experimento foram usadas quatro doses de massa de matéria seca de casca de arroz queimada (zero, 0,65 g, 6,5 g e 13 g dm-3 de solo) em cinco tempos de incubação (zero, 25, 50, 75 e 100 dias), avaliadas em relação as alterações que promoveram no pH, matéria orgânica do solo (MOS), fósforo (P), potássio (K), cálcio (Ca), magnésio (Mg) e silício (Si). No segundo experimento avaliou-se a ação da dose de 13 gramas de massa de matéria seca de casca de arroz queimada por dm-3 de solo com três diferentes tempos de incubação, e do silicato de cálcio e magnésio na dose de cinco gramas por dm-3 de solo, sobre os atributos químicos do solo, concentração de nutrientes na cenoura, componentes de produção e produtividade, em relação ao dano por Meloidogyne javanica. Para tal o experimento foi montado com cinco tratamentos com inoculação de nematoides (CN): CAQ90AS-CN (casca de arroz queimada incubada 90 dias antes da semeadura); CAQ45ASCN (casca de arroz queimada incubada por 45 dias antes da semeadura); CAQ00DS-CN (casca de arroz queimada incorporada na semeadura); SILIC-CN (silicato de cálcio e magnésio); TEST-CN (testemunha, com nematoides) e outros cinco tratamentos com igual composição, porém sem inoculação de nematoides (SN): CAQ90AS-SN; CAQ45AS-SN; CAQ00DS-SN; SILIC-SN; TEST-SN. Constatou-se no primeiro experimento, que a casca de arroz queimada, disponibilizou potássio (K) em quantidades diretamente proporcionais a dose, independente do tempo de incubação ao solo. Houveram incrementos nos teores de fósforo (P) e silício (Si) do solo, de forma linear para dose e tempo de incubação. A casca de arroz queimada apresentou efeito residual para fósforo (P) e, especialmente, para silício (Si). No segundo experimento a aplicação de casca de arroz queimada, na dose de 13 g dm-3 de matéria seca incubada por 90 dias no solo aumentou a massa de matéria fresca de raízes comercializáveis em 3,9 vezes em relação a do tratamento testemunha, com manutenção da produtividade da cenoura em solo infestado por Meloidogyne javanica. O silicato de cálcio e magnésio aumentou o pH do solo, com consequente redução de absorção de Mn e Zn pela cultura, menor desenvolvimento das cenouras e diminuição da massa de matéria fresca de raízes comercializáveis. Nenhuma das fontes de silício (Si), nas doses usadas na pesquisa, aumentou significativamente a concentração do nutriente nas plantas de cenoura. / A proper destination of rice husk to reuse this residue is a pressing task due to the problems generated by the discharge into the environment or indiscriminate use in agriculture without knowing its influence on plant and soil. Studies indicate a variety uses of carbonized rice husk. The residue contains a high concentration of silicon and also other nutrients. Research shows for some crops positive response using silicon to control nematodes pathogen that can reduce the yield and quality of carrot (Daucus carota L.). The objective of this research was evaluate the contribution of the carbonized rice husk as an alternative to reduce damage by nematodes in carrots and action in soil chemical properties. In the first chapter we evaluated the effect of dose and time of incubation of carbonized rice husk on soil chemistry attributes. In the second chapter we evaluated the use of carobonized rice husk with different incubation times and calcium magnesium silicate in soil chemical properties, concentration of nutrients in carrots, yield components and yield of roots. The two experiments were conducted in a greenhouse at Department of Crop Science, Esalq, Piracicaba/SP. In the first experiment four doses of carbonized rice husk (zero, 0,65 g, 6,5 g and 13 g dm-3 of soil) in five incubation times (zero, 25, 50, 75 and 100 days) were compared to pH, organic matter soil, phosphorus, potassium, calcium, magnesium and silicon. The second experiment evaluated the action of 13 g dm-3 of soil of carbonized rice husk with three incubation times, and five g dm-3 of soil of calcium and magnesium silicate on soil chemical properties, nutrient concentration in carrots , yield components and yield in relation to damage by Meloidogyne javanica by the following treatments: CAQ90AS-CN (incubated 90 days before sowing); CAQ45AS-CN (incubated for 45 days before sowing); CAQ00DS- CN (incorporated at sowing ); SILIC -CN (Ca and Mg silicate) ; TEST- CN (control with nematodes) and the same treatments without inoculation of nematodes (CAQ90AS - SN; CAQ45AS - SN; CAQ00DS - SN; SILIC - SN and TEST - SN). Based on the results of the first experiment we found that carbonized rice husk released potassium (K) in amounts directly proportional to dose applied, regardless of the incubation time on the ground. There were increases in the levels of phosphorus (P) and silicon (Si) soil linearly with the dose and time of incubation. The carbonized rice husk had residual effect on phosphorus (P), especially for silicon (Si). In the second experiment the application of carbonized rice husk at dose of 13 g dm-3, dry matter incubated for 90 days in the soil increased the fresh weight of marketable yield by 3.9 times compared to the control treatment, with maintaining productivity carrot in soil infested with Meloidogyne javanica. Calcium silicate and magnesium increased soil pH, with consequent reduction of manganese (Mn) and zinc (Zn) uptake by the crop, less development of carrots and decreased fresh weight of marketable roots. No sources of silicon (Si), the doses used in the study, significantly increased the concentration of the nutrient in carrot plants.

Made available in DSpace on 2017-07-25T19:29:39Z (GMT). No. of bitstreams: 1 Luciane Curtes Porfirio da Silva.pdf: 404496 bytes, checksum: f4f290399b0bc83914b1512ccbe10ac6 (MD5) Previous issue date: 2008-08-22 / Refrigerated storage is the main technology for maturity control and for minimizing deterioration of the fruit. However, because kaki (‘Fuyu’) is sensitive to cold temperatures, it can develop physiological disorders depending on the temperature and period of storing. Thus, considering its commercial value, this study aims to contribute with knowledge related to its postharvest quality. Commercial product Promalin® was applied to a plant sample of the fruit whereas another sample did not receive the product. The harvested fruit were stored in cold chamber (4ºC, commercial use) and in room temperature (20 to 26 ºC). The quality loss of the fruit was monitored during the storage. The cold chamber kept good fruit firmness quality for commercialization over 16 days, for both treatments, without and with the Promalin® application in the orchard, while in room temperature the periods were 16 and 8 days respectively. And Promalin® contributed for the bettering of firmness of these stored fruit, during the same time period, in the cold chamber. The Promalin® product anticipated the loss of firmness at room temperature compared to fruit that did not receive this product, and the activity of the poligalacturonase (PG) enzyme was coincident. The enzyme activity was coincident, whereas to what concerned to the poliphenoloxidase (PFO) enzyme, as long as the fruit presented acceptable firmness for its commercialization in cold chamber, there were not significant changes in its activity neither in those fruit without Promalin® nor in those which received the application of this product in the orchard. The total soluble solids, measured as °Brix, did not suffer significant change during its storage in cold chamber. / O armazenamento sob refrigeração é a principal tecnologia para retardar o metabolismo e consequentemente controlar a maturação e minimizar a deterioração de frutos. No entanto, o caqui por ser sensível ao frio, pode desenvolver desordens fisiológicas, dependendo da temperatura e do período de armazenagem. Assim, considerando a importância comercial do caqui ‘Fuyu’, essa pesquisa teve por meta fazer uma contribuição ao conhecimento relacionado com a pós-colheita desse fruto. Em frutos de uma amostra de plantas de caqui foi aplicado o produto comercial Promalin® e outra amostra não recebeu esse produto. Os frutos colhidos foram armazenados em câmara fria (4ºC, uso comercial) e em temperatura ambiente (20 a 26ºC). A qualidade dos frutos foi monitorada durante a armazenagem. A utilização da câmara fria manteve a boa firmeza dos frutos para a comercialização acima de 16 dias, para ambos os tratamentos, sem e com a aplicação de Promalin® no pomar, enquanto que, na temperatura ambiente os tempos foram de 16 e 8 dias, respectivamente. E o Promalin® contribuiu para a melhoria da firmeza desses frutos armazenados, em igual tempo, na câmara fria. O produto Promalin® antecipou a perda de firmeza de frutos armazenados à temperatura ambiente, em comparação com frutos que não receberam esse produto, e, a atividade da enzima poligalacturonase (PG) foi coincidente. Com relação à atividade da enzima polifenoloxidase (PFO), enquanto o fruto apresentou firmeza aceitável para a comercialização em câmara fria não houve mudança significativa de sua atividade, tanto nos sem Promalin® como nos frutos que receberam a aplicação desse produto no pomar. Os sólidos solúveis totais, medidos como °Brix, não sofreram mudança significativa durante o armazenamento em câmara fria.