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1
Brown, Jillian. « Bacterial community composition, TCE degradation, isotopic fractionation and toxicity of a TCE contaminated aquifer ». Thesis, Available from the University of Aberdeen Library and Historic Collections Digital Resources, 2009. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?application=DIGITOOL-3&owner=resourcediscovery&custom_att_2=simple_viewer&pid=33520.
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Menezes, Filho Carlos. « A influência da Escola de Contas e Gestão do TCE na percepção da mudança da imagem da marca do TCE : a percepção dos servidores ». reponame:Repositório Institucional do FGV, 2008. http://hdl.handle.net/10438/17020.
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O objetivo deste estudo é levantar a influência da criação da Escola de Consta e Gestão do Tribunal de Contas do Estado do Rio de Janeiro na mudança da percepção da imagem da marca coorporativa do Tribunal de Contas do Estado do Rio de Janeiro segundo a percepção dos servidores. O estudo foi feito sob o enfoque da fenomenologia, sendo dado tratamento de categorias filosóficas para a percepção e para a imagem. O conceito de marca foi analisado sob o enfoque do marketing. A pesquisa de campo foi feita por meio de entrevistas semi-estruturadas e desenhos elaborados pelos respondentes. Chegou-se à conclusão que a criação da ECG influenciou a percepção de mudança na imagem do TCE, embora tal influência não tenha sido notada na percepção da missão institucional da organização.
3
Costa, Ingrid Biermann de Azevedo. « A GED no TCE-PB : representações sociais de seus usuários ». Universidade Federal da Paraíba, 2014. http://tede.biblioteca.ufpb.br:8080/handle/tede/5914.
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Previous issue date: 2014-02-20Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES
Identify the GED user s social representations in TCE-PB, by tracing the user s profile and reconstructing the deployment process. The approach used was qualitative and quantitative, using the theory of social representations and discourse of the collective subject method. There were used as technical procedures the literature research and fieldwork procedures. Data were collected through the application of mixed questionnaires sent by mail or delivered by hand to the TCE-PB server s that work in the departments of management municipal auditory I and II. This study found that the GED has improved the daily executions tasks and work routines, required less time and effort to fulfill the goals and that users are satisfied with the current conditions. Even brought negative evidences that need to be improved, such as dissatisfaction with the network speed and with the functionality and information foment to SAGRES system, as well as the possibility that current working conditions may affect health.
Apreender as representações sociais dos funcionários do TCE-PB a respeito da GED, traçando-se o perfil dos usuários e reconstruindo-se o processo de implantação. A abordagem utilizada foi qualiquantitativa, com a utilização da teoria das representações sociais e o método do discurso do sujeito coletivo. Utilizaram-se como procedimentos técnicos a pesquisa bibliográfica documental e a pesquisa de campo. Os dados foram coletados através da aplicação de questionários mistos enviados por e-mail ou entregues em mãos aos funcionários do TCE-PB lotados nos Departamentos de Auditoria da Gestão Municipal I e II. O estudo apontou que o GED melhorou as execuções cotidianas das tarefas e rotinas de trabalho, exigiu menos tempo e esforço para o cumprimento das metas e que os usuários encontram-se satisfeitos com as atuais condições de trabalho. Trouxe ainda evidências negativas que precisam ser melhoradas, como insatisfação com a velocidade da rede e com a funcionalidade e fomento de informações do SAGRES, assim como a possibilidade de que as atuais condições de trabalho possam afetar a saúde.
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Plett, James. « Metolachlor and TCE Plume Characteristics in a Dolostone Aquifer Using a Transect ». Thesis, University of Waterloo, 2006. http://hdl.handle.net/10012/2966.
Texte intégralRésumé :
Much is known about natural attenuation of contaminants in granular aquifers because many contaminant plumes in these aquifers have been intensively monitored with detailed sampling along cross sections positioned across the plumes (i. e. transects). However, little is known about natural attenuation of contaminant plumes in fractured rock. In this thesis study, strong natural attenuation of a persistent co-mingled plume of trichloroethylene (TCE) and an herbicide (metolachlor) in a 100 m thick dolostone aquifer used for municipal water supply in Cambridge, Ontario is shown based on detailed delineation of groundwater contaminant concentrations along a single transect located 150 m downgradient from the area where the metolachlor entered the dolostone and 300 m downgradient from the TCE source area. This delineation was accomplished using depth-discrete, multilevel groundwater monitoring systems in five cored holes and detailed analyses of contaminant concentration in rock cores. The maximum metolachlor concentration on the transect is a factor of 20 below the maximum concentration in the metolachlor source area and the maximum TCE concentration on the transect is lower by a factor of 100 from the TCE source area. Matrix diffusion and strong temporal variability of the groundwater flow system caused by pumping of nearby municipal wells have likely caused strong natural attenuation of metolachlor and TCE and degradation has likely contributed to even stronger TCE attenuation. The transect shows rock core concentrations much higher than the groundwater concentrations in the multilevel systems at the same locations and in the conventional monitoring wells, which indicates that plume persistence is likely maintained by back diffusion from the rock matrix, which has very low hydraulic conductivity but substantial porosity, into the active groundwater flow in the fractures.
Metolachlor has been observed at very low concentrations and has persisted at these concentrations in the nearest municipal pumping well located approximately 780 m downgradient of the transect, however this well shows no detectable TCE. The relatively low concentrations along the transect and the replenishment of the plume by back diffusion suggests that a substantial increase of metolachlor or TCE in the municipal well is unlikely.
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Mattson, Kelli M. « Investigating the Biostimulating Effects of ESO Addition to a TCE Contaminated Site ». Thesis, Virginia Tech, 2004. http://hdl.handle.net/10919/40871.
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Remediation of chlorinated ethene contaminated sites presents a problem for the environmental industry. Many innovative technologies exist to remove these chemicals from the subsurface; however, most of these technologies require extensive time and incur significant cost. A technology called bioremediation utilizes microorganisms to break down contaminants such as perchloroethene (PCE), trichloroethene (TCE), dichloroethene (DCE), and vinyl chloride (VC) to non-toxic compounds in a process called reductive dechlorination.
Microorganisms that are capable of dechlorination usually require reducing conditions as well as bioavailable hydrogen and carbon sources. Emulsified vegetable oil has emerged as a cost-effective source of degradable organic matter to facilitate reductive dechlorination in the subsurface. Through Æ Ã -oxidation, microorganisms can break down the long chain fatty acids in vegetable oil into smaller fatty acids such as acetate, propionate, and butyrate. The fermentation of the oil provides reduced conditions as well as a slow release of hydrogen and carbon into the subsurface.
This study consisted of an evaluation the effectiveness of emulsified vegetable oil in stimulating reductive dechlorination using sixteen laboratory microcosms constructed from soil and groundwater from an aquifer contaminated with TCE located at the Naval Weapons Station in Charleston, South Carolina. Each microcosm was monitored for chloroethenes, volatile fatty acids, long chain fatty acids, and total carbon on a weekly basis. Results show successful fermentation of fatty acids and reduced conditions favorable for dechlorination.Master of Science
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Braga, Bernardo Drummond. « Devemos monitorar a pressão intracraniana de pacientes com TCE grave marshall II ? » Universidade Federal de Minas Gerais, 2013. http://hdl.handle.net/1843/BUBD-9GHHJA.
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Introduction: Intracranial pressure (ICP) monitoring is considered the standard of care for severe traumatic brain injury (TBI). A recent clinical trial concluded that care focused on maintaining monitored intracranial pressure at 20 mm Hg or less was not shown to be superior to care based on imaging and clinical examination. Purpose: Evaluate the relationship of intracranial hypertension with an increase of brain lesions, mortality and morbidity in patients with severe TBI Marshall II. Determine whether these patients need to have ICP monitored. Methods: Prospective observational cohort study on severe TBI patients (GCS8), Marshall CT classification II. Results: Seventy patients were divided into 2 groups based on ICP in the first 48h; G1: ICP 20mmHg (49 patients) and G2 ICP > 20mmHg (21 patients), 90% male, mean age 30.8 years, 78,5% sustained motor vehicle crash or pedestrian injuries, mean GCS 6. The most common CT findings were: subarachnoid hemorrhages and contusions (22 and 18 respectively). Seven patients died in G2 (33%) compared to 2 deaths in G1 (4%) (p<0.05). The OR of death was 11,7 times greater in G2 (95%CI: 2.2- 63,1). The median Glasgow outcome scale (GOS) score at 90 days was 2 in G2 and 5 in G1. New CT findings or progression were detected in 15 (71%) of G2 patients and in 5 (10%) G1 patients (p<0.05). The OR of new CT finding or progression was 22 times greater in G2 than G1 (95%CI: 5,02- 106,9). Two patients in G2 required surgery, none in G1. Conclusions: Severe TBI patients with Marshall score II and intracranial hypertension, are at greater risk for new CT abnormalities, worse prognosis, and higher mortality than those with no hypertension. ICP monitoring was crucial to define prognosis. Severe TBI Marshall II patients should be monitored.Introdução: A monitoração da pressão intracraniana (PIC) é considerada o tratamento padrão para pacientes com traumatismo cranioencefálico grave (TCE). Um ensaio clinico recente demonstrou que pacientes tratados conforme protocolos em que o foco é manter a PIC menor que 20mmhg, não foi superior a protocolos de tratamento baseado em imagens e exame físico. Objetivos: Avaliar a relação da hipertensão intracraniana com crescimento de lesões, mortalidade e morbidade em pacientes com TCE grave Marshall II. Determinar se esses pacientes precisam monitorar a PIC. Método: Estudo de coorte observacional prospectivo em pacientes com TCE grave classificados como Marshall II. Resultados: setenta pacientes foram divididos em dois grupos baseado na PIC: G1- PIC 20mmHg (49 pacientes) e G2- PIC > 20mmHg (21 pacientes). Sendo: 90% masculino, idade média de 30.8 anos, 78,5% tendo como mecanismo de trauma o acidente automobilistico ou atropelamento. A escala de coma de glasgow (ECG) média foi igual a 6. Os achados mais comuns na tomografia foram hemorragias subaracnóideas e as contusões (22 e 18 respectivamente). Sete pacientes morreram no G2 (33%) comparado a duas mortes no G1 (4%) (p<0,05). O OR de mortalidade foi 11,7 vezes maior no G2 (IC 95%: 2,2 a 63,1). A mediana da Escala de Desfecho de Glasgow após 90 dias foi de 2 para o G2 e de 5 para o G1. Novos achados ou progressões de lesões ocorreram em 15 (71%) dos pacientes do G2 e em 5 (10%) dos pacientes do G1 (p<0,05). O OR de um novo achado na TC foi vinte e duas vezes maior no G2 em comparação ao G1 (IC 95%: 5,02 a 106,9). Dois pacientes do G2 precisaram de cirurgia e nenhum do G1. Conclusões: Pacientes com TCE grave Marshall II, com hipertensão intracraniana, tem maior risco para crescimento de lesões na TC de controle, pior prognóstico e maior mortalidade que aqueles sem hipertensão. A monitoração destes pacientes foi definitiva para determinar o prognóstico. Pacientes com TCE grave Marshall II deverão ser monitorados.
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Oliveira, Priscila Pinto de. « A influência da imprensa no processo de ampliação da transparência no TCE-RS ». Pontifícia Universidade Católica do Rio Grande do Sul, 2012. http://hdl.handle.net/10923/1956.
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Previous issue date: 2012This dissertation analyses the media influence on introduction of transparency processes at Tribunal de Contas do Estado do Rio Grande do Sul (TCE-RS) between 2008 and 2011. In order to achieve this purpose, first we present the concepts of public transparency and accountability according the literature. The focus is to show how the media acts as an agent of social responsiveness. After, we expose the political context and the institutional changes that occurred at TCE-RS during the period in analyses. The media view of this time is also focused. The objective is to show the context of the decision making moments regarding transparency. Then, we analyses four interviews made with the men who were president of TCE-RS during the period in focus. The interview intent is to reveal factors that influenced the introduction of transparency processes at TCE-RS. Our findings indicate that media played a key role at these institutional changes.
Esta dissertação analisa a influência da imprensa na adoção de mecanismos de transparência pelo Tribunal de Contas do Estado do Rio Grande do Sul (TCE-RS) entre 2008 e 2011. Para contextualizar o tema, são apresentados os conceitos de transparência pública e accountability, além de suas dimensões e vertentes. O objetivo é jogar luz sobre a atuação da mídia como agente de responsabilização social. Em um segundo momento, é realizado um apanhado histórico do surgimento e da consolidação dos tribunais de contas do país, especialmente no Rio Grande do Sul. Em seguida, são expostas a conjuntura política e as mudanças institucionais sofridas pelo TCE-RS no período estudado e a visão da imprensa sobre a instituição à época. A intenção é reconstituir o cenário existente nos momentos de tomada de decisão em relação à transparência. Por último, a partir de entrevistas com os presidentes que estiveram à frente da instituição no período enfocado, busca-se demonstrar os fatores que influenciaram a Corte no sentido de ampliar a transparência das suas ações e de instituir canais de comunicação com a sociedade. A pesquisa indica que a imprensa foi um dos fatores fundamentais nessa mudança institucional.
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Sehnem, Clarissa Garcia Corrêa. « Cooperação interorganizacional no setor público : o arranjo entre a EG/FDRH e a ESGC/TCE-RS ». reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2017. http://hdl.handle.net/10183/165639.
Texte intégralRésumé :
Esta dissertação buscou analisar um arranjo de cooperação interorganizacional no setor público direcionado para a qualificação dos servidores públicos no que tange à gestão e fiscalização de contratos. O objetivo principal foi compreender como se formou o arranjo de cooperação entre a Escola de Governo (EG)/FDRH e a Escola de Gestão e Controle Francisco Juruena/TCE-RS, assim como sua atuação na legitimação de práticas padronizadas relacionadas à gestão e fiscalização de contratos públicos no âmbito do Rio Grande do Sul através da operacionalização de um curso na modalidade EAD. Trata-se de um estudo de caso predominantemente qualitativo com base em: 1) pesquisa documental para compreensão dos fatores históricos e características das duas organizações que realizaram a cooperação; 2) entrevistas semiestruturadas com os principais atores que participaram do processo decisório em relação à formação, operacionalização e avaliação dos principais resultados do arranjo de cooperação; e 3) questionários enviados aos alunos aprovados na primeira edição do curso para identificar sua percepção sobre a relevância do Curso de Gestão e Fiscalização de Contratos EAD. Como principais resultados desta pesquisa, percebe-se que o curso vem atingindo seus objetivos ao padronizar a atividade dos fiscais e gestores de contratos públicos, assim como as edições EAD suportadas pelo arranjo de cooperação interorganizacional atingiram um número maior de alunos/servidores, com menor custo e com abrangência de servidores de um maior número de municípios.This dissertation had the intent to analyze an interorganizational arrangement within the public sector related to the qualification of the public sector employees regarding inspections and Management of Contracts. The main objective was to understand how the cooperation arrangement between the Government School/ FDRH and the Management and Control School Francisco Juruena/TCE-RS was established, as well as its performance in the legitimation of isomorphic practices related to the management and inspection of public contracts within Rio Grande do Sul’s scope, via the operationalization of an EAD course. This is a predominantly qualitative study based on: 1) documented research to understand the historical factors and characteristics of the two organizations that practiced the cooperation; 2) semi-structured interviews with the main players who participated in the decision-making process regarding the establishment, operationalization and evaluation of the main results of the cooperation arrangement; and 3) questionnaires sent to the course’s first edition approved students in order to capture their perception about the relevance of the EAD Contracts Management and Inspection course. It was perceived, via the main results of this research, that the course reached its objectives as part of an institutionalization process that seeks to standardize the activity of inspection and public contract managers; As well as the EAD editions supported by the interorganizational cooperation arrangement reached a greater number of students /employees, with lower cost and with the inclusion of public employees from a greater number of municipalities;
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Secrist, Philip Moyer III. « A Numerical Model (SEAM3D) to Assess the Biotransformation of Chlorinated Ethenes at a TCE/BTEX Contaminated Site ». Thesis, Virginia Tech, 2002. http://hdl.handle.net/10919/42433.
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Numerical models (GMS MODFLOW, SEAM3D, and SEAM3D Interface) were applied to simulate groundwater flow, petroleum hydrocarbon compound (PHC) transport and biodegradation, and the transport and biotransformation of chlorinated ethenes at Site FT-002 Plattsburgh Air Force Base (PAFB), NY. Site FT-002 was contaminated with waste jet fuel and chlorinated ethenes used as a fire source during fire fighting training. The results of groundwater analysis indicated that the aquifer exhibited aerobic, nitrate reducing, ferrogenic, sulfate reducing and methanogenic conditions due to the biodegradation of the PHCs. Additional groundwater analysis showed the biotransformation of TCE to DCE, VC, and ethene. A numerical model was developed to simulate and assess the extent to which reductive dechlorination and direct anaerobic oxidation were responsible for the biotransformation of the chlorinated ethenes. Reductive dechlorination accounted for the 100%, 98.3%, and 97.5% of the biotransformation of TCE, DCE, and VC respectively. Direct anaerobic oxidation accounted for 1.7% and 2.5% of the biotransformation of DCE and VC respectively. Though direct anaerobic oxidation only accounted for a small percentage of total biotransformation it was necessary to fully develop the biotransformation of the DCE and VC in the ferrogenic zone. This study focused on the mechanisms responsible for the biotransformation of chlorinated ethenes, specifically reductive dechlorination and direct anaerobic oxidation. By further defining the NAPL source and initial conditions it could be used as a tool to accurately predict the monitored natural attenuation (MNA) of the FT-002 contaminant plume.Master of Science
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Ogundare, Ojo Oluwaseun. « Optimization and Analysis of a Slow-Release Permanganate Gel for TCE Plume Treatment in Groundwater ». Ohio University / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou161797021188483.
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Murphy, Samantha E. M. « Characterization of a TCE-contaminated aquifer using tritium-helium dating and geochemical tracers, Valcartier, Quebec, Canada ». Thesis, University of Ottawa (Canada), 2009. http://hdl.handle.net/10393/28386.
Texte intégralRésumé :
The groundwater supply in the Valcartier area of Quebec is contaminated with trichloroethylene (TCE) from multiple sources, and hydrogeologic characterization is being carried out to understand its origin and migration patterns. A geochemical investigation was undertaken to independently verify groundwater flow and TCE transport in Valcartier groundwater to improve a numerical model that is currently being developed.
3H-3He ages were obtained along flow paths stemming from two main source zones and compared with advective model ages produced at corresponding locations. Ages obtained above and below a prodeltaic silty aquitard in the eastern part of the study area were used to calculate an average vertical hydraulic conductivity (Kv) of 1.3-3.1x10-8 m/s. 3H-3He ages were compared with modelled ages at different values of porosity (n) and recharge; the bestcorrespondence was found to be at 0.35 and 300 mm/yr, respectively. Anomalously high concentrations of terrigenic He and unexpectedly old 3H-3He ages in some areas indicate areas where groundwater in the underlying proglacial aquifer may flow upward into the deltaic sand aquifer.
Geochemical parameters measured in groundwater along the flow paths as well as in Shannon and in the proglacial aquifer were examined for patterns. Multivariate statistics (Principal components analysis and cluster analyses) were applied to the data to distinguish different types of groundwater; the geochemistry of each group reflects recharge origin and lithology encountered. The groups verify flow paths delineated by the groundwater model, and help distinguish groundwater of different origins downgradient of source zones. One facies in particular is associated with high TCE concentrations and occurs where groundwater upflow from the proglacial aquifer in Shannon inferred from the 3H-3He data. This appears to be TCE coming from a previously unrecognized source in the south part of the study area, possibly an old bedrock dump.
This study demonstrates the value of integrating geochemical information in groundwater characterization programs with existing information to refine the understanding of groundwater flow, especially in the development of numerical models.
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Oliveira, Priscila Pinto de. « A influ?ncia da imprensa no processo de amplia??o da transpar?ncia no TCE-RS ». Pontif?cia Universidade Cat?lica do Rio Grande do Sul, 2012. http://tede2.pucrs.br/tede2/handle/tede/4708.
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Previous issue date: 2012-07-30This dissertation analyses the media influence on introduction of transparency processes at Tribunal de Contas do Estado do Rio Grande do Sul (TCE-RS) between 2008 and 2011. In order to achieve this purpose, first we present the concepts of public transparency and accountability according the literature. The focus is to show how the media acts as an agent of social responsiveness. After, we expose the political context and the institutional changes that occurred at TCE-RS during the period in analyses. The media view of this time is also focused. The objective is to show the context of the decision making moments regarding transparency. Then, we analyses four interviews made with the men who were president of TCE-RS during the period in focus. The interview intent is to reveal factors that influenced the introduction of transparency processes at TCE-RS. Our findings indicate that media played a key role at these institutional changes.
Esta disserta??o analisa a influ?ncia da imprensa na ado??o de mecanismos de transpar?ncia pelo Tribunal de Contas do Estado do Rio Grande do Sul (TCE-RS) entre 2008 e 2011. Para contextualizar o tema, s?o apresentados os conceitos de transpar?ncia p?blica e accountability, al?m de suas dimens?es e vertentes. O objetivo ? jogar luz sobre a atua??o da m?dia como agente de responsabiliza??o social. Em um segundo momento, ? realizado um apanhado hist?rico do surgimento e da consolida??o dos tribunais de contas do pa?s, especialmente no Rio Grande do Sul. Em seguida, s?o expostas a conjuntura pol?tica e as mudan?as institucionais sofridas pelo TCE-RS no per?odo estudado e a vis?o da imprensa sobre a institui??o ? ?poca. A inten??o ? reconstituir o cen?rio existente nos momentos de tomada de decis?o em rela??o ? transpar?ncia. Por ?ltimo, a partir de entrevistas com os presidentes que estiveram ? frente da institui??o no per?odo enfocado, busca-se demonstrar os fatores que influenciaram a Corte no sentido de ampliar a transpar?ncia das suas a??es e de instituir canais de comunica??o com a sociedade. A pesquisa indica que a imprensa foi um dos fatores fundamentais nessa mudan?a institucional.
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Brucha, Gunther. « Avaliação da diversidade microbiana de consórcios anaeróbios enriquecidos a partir de amostras de sedimento lacustre na degradação anaeróbia do tricloroetileno - TCE, empregando-se a técnica de eletroforese em gel com gradiente desnaturante - DGGE ». Universidade de São Paulo, 2001. http://www.teses.usp.br/teses/disponiveis/18/18139/tde-30012017-102026/.
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Sedimento do reservatório hipereutrófico de Salto Grande, localizado na cidade de Americana, São Paulo, foi cultivado em condições anaeróbias em meio mineral adicionado de compostos orgânicos (ácidos voláteis e álcoois) com a finalidade de favorecer a metanogênese do sistema. Com a produção de 70% de metano o sedimento foi utilizado para o teste de degradação anaeróbica do TCE. Os testes foram realizados sob atmosfera de N2/CO2 (70:30%) em frascos reatores a 25ºC e agitação constante de 150 rpm. Os frascos reatores foram preparados com meio mineral, acrescido de fontes orgânicas (5 mM de ácidos acético, fórmico e butírico, mas 2,5 mM de ácido lático e 5 mM de etanol e metanol) e inoculado com 5 g de sólidos totais voláteis por litro. Foram preparados frascos com 12 e 6 mg de tricloroetileno por litro. Dois tipos de controles foram preparados, um sem tricoroetileno e outro sem inóculo. Análise da diversidade microbiana utilizando a metodologia do DGGE - Eletroforese em Gel com Gradiente Desnaturante - foram feitas com amostras dos frascos reatores no final do experimento. O DNA da comunidade foi extraído de acordo com o protocolo descrito por TSAI & OLSON (1991) e fragmentos do DNAr 16S foram amplificados com \"primers\" do Domínio Archaea e Bacteria. Os resultados dos testes de degradação do TCE demonstraram a remoção biótica de 68% e 66% nos reatores contendo 6 e 12 mg TCE/L, respectivamente, depois de 56 dias de incubação. No final do experimento morfologias similares aos gêneros Methanosarcina e Methanosaeta estavam presentes. A análise da diversidade microbiana não revelou uma significativa na comunidade após a adição do TCE, demonstrando que a microbiota enriquecida proveniente do reservatório de Salto Grande foi resistente à concentração do TCE estudada podendo ser responsável pelo processo de degradação sob metanogênese.Sediments from the supereutrophic reservoir of Salto Grande, City of Americana, São Paulo State, Brazil, were cultivated under anaerobic conditions in a mineral medium added of organic compounds (volatile fatty acids and alcohols) in order to produce methane. Under 70% of methane production, sediment samples were used for tests of TCE anaerobic degradation. The tests were carried out under N2/CO2 (70:30%) atmosphere in reactor flasks, at 25°C, and constant shaking at 150 rpm. The reactor flasks were prepared with mineral medium, added with organic sources [5 mM of acetic, formic and butyric acids, plus 2.5 mM of lactic acid and 5 mM of ethanol and methanol each], and inoculated with 5 g of STV/L of the sediments. Amounts of 6 and 12 mg/L of TCE concentrations were evaluated. Two types of control reactors were prepared, without TCE and without sediments. Diversity analyses using the DGGE - Denaturing Gradient Gel Eletrophoresis - technique were done with samples from the reactor flasks at the end of the experiment. The community DNA was extracted as described by TSAl & OLSON (1991) and fragments of the 16SDNAr were magnified using the PCR methodology, with Bacteria and Archaea domain primers. The results showed degradation of 40% of TCE at concentrations of 6 mg/L and 12 mg/L after 13 days of incubation time, and complete organic acids removal with 40% of methane in the atmosphere. A second addition of 9 mM of the former organic acids indicated and 4.5 mM of lactic acid resulted in 90% of TCE removal, with 50% of methane, after 56 days of incubation time. Morphologies similar to the genera Methanosarcina, Methanosaeta and Methanospirillum were verified. The microbial diversity analysis did not reveal significant differences among Bacteria and Archaea domains under TCE additions. It was possible to assume that the enriched microbiota from the Salto Grande reservoir was resistant to the concentrations of TCE studied and can be responsible for the degradation processes under methanogenesis.
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Jorge, Francisco Xavier. « Auditoria ambiental : a efetividade da auditoria ambiental de resíduos sólidos urbanos no município de Manaus – indicadores do TCE/AM : 2010 a 2014 ». Universidade Federal do Amazonas, 2016. http://tede.ufam.edu.br/handle/tede/5102.
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CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
The current legislation requires the State Audit Courts to ensure the healthy environment, so one of the mechanisms that the Amazonas State Court of Auditors - ECA/AM can be used is the Environmental Audit. The overall objective of the research is to evaluate the Environmental Audits Indicators of Municipal Solid Waste, applied by the ECA/AM in the years 2010 and 2014 in Manaus, by comparing the structural problems and environmental management identified by examination with the Master Plan indicators solid waste of Manaus and indicators of sustainability for MSW management in environmental / ecological dimension of the scientific literature to see if the audit reports fairly present the problems of environmental management of solid waste in the city of Manaus. As for the procedures it is classified as a documentary and bibliographical research. Made use of public documents published on the Internet by the ECA/AM and Environmental audit reports carried out. It identified the Environmental Audit indicators used by the ECA/AM, by reviewing the scientific literature, audit reports of the ECA/AM. The audit of the ECA found environmental risk. It found the record that the waters of the stream of Matrinxã from its entrance on the outskirts of the ACM and the groundwater in wells closest to the landfill, are compromised. Contamination of water resources surrounding the ACM are from environmental liabilities arising from the unlawful disposal of solid waste in the former "dump" for over 20 years, linked to inadequate implementation. We also found that the acceleration of the effluents of the output process of . slurry ponds because of rainwater and entrained soil from the erosion in the surrounding embankments research proved the reasonableness of audit reports when they reveal the environmental management problems of solid waste from the city of Manaus in the period 2010 and 2014.
A legislação vigente obriga aos Tribunais de Contas Estaduais a garantirem o meio ambiente saudável, assim um dos mecanismos que o Tribunal de Contas do Estado do Amazonas -TCE/AM, pode utilizar-se é a Auditoria Ambiental. O objetivo geral da pesquisa é Avaliar os Indicadores de Auditorias Ambientais de Resíduos Sólidos Urbanos, aplicadas pelo TCE/AM nos anos de 2010 a 2014 em Manaus, mediante a comparação dos problemas estruturais ede gestão ambiental identificados pelo exame com os indicadores do Plano Diretor de Resíduos Sólidos de Manaus e Indicadores de sustentabilidade para a gestão de RSU na dimensão ambiental/ecológica da literatura científica para comprovar se os relatóriosde Auditoria apresentam razoavelmente os problemas de gestão ambiental dos resíduos sólidos do Município de Manaus.Quanto aos procedimentos é classificada como uma pesquisa bibliográfica e documental. Fez uso de documentos públicos publicados na internetpelo TCE/AM e relatórios de Auditorias Ambientais realizadas.Identificou-se os indicadores de Auditoria Ambiental utilizados pelo TCE/AM, por meio da revisão da literatura científica, relatórios de auditorias do TCE/AM. A Auditoria do TCE encontrou situações de risco ambiental. Constatou-se o registro de que as águas do igarapé do Matrinxã, a partir de sua entrada nos limites do ACM, bem como às águas subterrâneas nos poços mais próximos ao Aterro, estão comprometidas. A contaminação dos recursos hídricosno entorno do ACM são provenientes do passivo ambiental relativo à deposição irregular de resíduos sólidos no antigo “lixão" por mais de 20 anos, atrelado à operacionalização inadequada. Também constatou-se a aceleração do processo de saída dos efluentes das lagoas de chorume em virtude das águas pluviais e de solo arrastado, proveniente das erosões nos taludes do entorno. A pesquisa comprovou a razoabilidade dos relatórios de Auditoria quando revelam os problemas de gestão ambiental dos resíduos sólidos do Município de Manaus no período 2010 a 2014.
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Longley, Kirsi. « The feasibility of poplars for phytoremediation of TCE contaminated groundwater a cost-effective and natural alternative means of groundwater treatment / ». Online pdf file accessible through the World Wide Web, 2007. http://archives.evergreen.edu/masterstheses/Accession86-10MES/Longley_K%20MESThesis%202007.pdf.
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Machado, Maria Goreti Farias. « A promoção da accountability na fiscalização de municípios do Rio Grande do Sul : a atuação do TCE na implementação do FUNDEB de 2007 a 2009 ». reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2012. http://hdl.handle.net/10183/49811.
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Este estudo teve por objetivo caracterizar a accountability da administração pública evidenciada nas práticas do Tribunal de Contas do Estado do Rio Grande do Sul (TCE-RS) no acompanhamento da implementação do Fundeb no Rio Grande do Sul, no período de 2007 a 2009. Abrange diretrizes e mecanismos de accountability da administração pública, com base na investigação de orientações e procedimentos exercidos pelo TCE-RS em relação a administrações públicas municipais no estado. Foi adotada uma abordagem qualitativa de pesquisa, sendo estudadas, principalmente, normas vigentes relativas ao tema, de âmbito nacional e estadual, e documentos do TCE. Elementos da análise de conteúdo serviram de referência no tratamento e no exame de dados e informações, organizando-os em categorias de análise. A fundamentação teórica envolveu os conceitos e as dimensões dos mecanismos (instrumentos institucionais) de controle externo na perspectiva da accountability política. O propósito foi discutir conceitos, dimensões e implicações da accountability na consolidação das novas democracias, buscando uma aproximação para o caso brasileiro, com vistas a situar o TCE-RS como órgão responsável pela fiscalização da administração pública na perspectiva da accountability. Nesta perspectiva, foi empreendida uma incursão pelas diversas concepções e interpretações para a expressão accountability, em especial por conceitos e dimensões abordadas por O’Donnell. Tratou, ainda, do aparato legal para o financiamento da educação e da administração pública brasileira, assim como da estrutura e do funcionamento do TCE-RS enquanto órgão auxiliar fiscalizador da administração pública, por meio da abordagem de suas práticas e procedimentos. Dentre os resultados do estudo foi possível identificar que, mesmo com o aparato de procedimentos, orientações e práticas exercidas pelo TCE-RS na fiscalização da aplicação dos recursos da educação, que criam condições para a promoção da accountability, o resultado do rito processual de prestação de contas apresenta limites, materializados especialmente na falta de acompanhamento do cumprimento das sanções imputadas aos gestores e na fragilidade do funcionamento dos sistemas de controle interno das administrações municipais.This study aimed to characterize the accountability of public administration evidenced on the practices of the Rio Grande do Sul State Court of Auditors (TCE-RS) in monitoring the implementation of Fundeb in Rio Grande do Sul between 2007 and 2009. It covers guidelines and mechanisms of accountability in public administration, based on the investigation of conducts and procedures exercised by TCE-RS regarding municipal governments in the state. A qualitative approach of research was adopted, studying especially the rules related to the subject, in national and regional scope, and documents of TCE. Content analysis elements were used as reference to process and exam data and information, organizing them into analysis categories. The theoretical background involved the concepts and the dimensions of external control mechanisms (institutional instruments) from the perspective of political accountability. The purpose was to discuss concepts, dimensions and implications of accountability in the consolidation of new democracies, seeking an approach to the Brazilian case, in order to situate TCE-RS as an organ responsible for overseeing public administration in the perspective of accountability. In this perspective, it was undertaken a study on the various conceptions and interpretations of the term accountability, especially on concepts and dimensions dealt by O’Donnell. It was also referred the legal apparatus for the financing of education and public administration in Brazil, as well as the structure and operation of TCE-RS as an auxiliary organ of government oversight, through the approach of its practices and procedures. Among the results of the study it was found that, even with the apparatus of procedures, guidelines and practices adopted by TCE-RS in monitoring the implementation of educational resources, which create conditions for the promotion of accountability, the result of procedural rite of accountability has limits especially materialized in the absence of attending observance of the sanctions set against managers and in the fragility of internal control systems of the municipal administrations.
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Cabral, Sânzio Fernandes. « Fluxo de operações ligadas à análise de contas no TCE/PB sob a ótica dos modos de conversão do conhecimento organizacional ». Universidade Federal da Paraíba, 2008. http://tede.biblioteca.ufpb.br:8080/handle/tede/3788.
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Previous issue date: 2008-03-04Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES
In the current context of transformation, the so called knowledge organizations seek to integrate, at least, three important components: infrastructure, people and technology. In this study, it is supposed that the process of knowledge management should consider this trilogy integrated. This research aimed to describe the main flow of operations related to the Analysis of Municipal Accounts in TCE-PB, external controlization of the state of Paraiba, from the perspective of modes of conversion of organizational knowledge. This investigation characterized itself as a basic search, with a mixed qualitative and quantitative as well as descriptive and exploratory approach, also using as technical procedures the bibliographic review, and the single case study method, limited to five Divisions of Monitoring of Municipal Management. The search tools used were the questionnaire, the focus group, quantitative statistical analysis and qualitative analysis of content, respectively. Through this case, it was found the need of technology to be properly harnessed, because it is used merely as tool for serving data without significant support for people, despite a good infrastructure. In addition to conditioning factors of the process of knowledge management, such as centralization of decisions and organizational culture in the public sector, it has shown that the knowledge creation process faces a number of baniers such as the absence of the practice of outsourcing and socialization, due to a misunderstanding of the concepts of socialization and combination. It was conclued that the flow of operations in the review of municipal accounts are handcared lack of incentive to the best practices of dissemination of tacit knowledge between servers and preservation of organizational memory, such as formation of discussion groups, expertises maps and disclosure of creative methods of network analysis.
No atual contexto de transformação, as chamadas organizações do conhecimento buscam integrar, pelo menos três componentes essenciais: infraestrutura, pessoas e tecnologia. Neste estudo, entende-se que o processo de gestão do conhecimento deve considerar essa trilogia integrada. O objetivo da pesquisa foi descrever o fluxo das operações relacionadas à Análise de Prestação de Contas no TCE-PB, órgão de controle externo do Estado da Paraíba, sob a ótica dos modos de conversão do conhecimento organizacional. Tal investigação se caracterizou como uma pesquisa básica, com abordagem mista quantitativo-qualitativa, enfoque descritivo-exploratório, usando também como procedimentos técnicos a pesquisa bibliográfica e documental e o método de estudo de caso único, limitado ao âmbito de cinco Divisões de Acompanhamento da Gestão Municipal do TCE-PB, envolvidas na análise de contas. Como instrumento de pesquisa, para a técnica de coleta e tratamento de dados, utilizaram-se o questionário, o grupo focal e a análise de conteúdo qualitativa e de procedimentos estatísticos, respectivamente. Por intermédio desse caso, foi constatada a necessidade de a tecnologia ser adequadamente aproveitada, pois é utilizada meramente como instrumento de veiculação de dados, sem expressivo suporte para as pessoas, apesar de uma boa infra-estrutura. Além de fatores condicionantes do processo de Gestão do Conhecimento, como centralização das decisões e a cultura organizacional do setor público, evidenciou-se que o processo de criação do conhecimento enfrenta uma série de lacunas, a partir da ausência da prática da externalização e da socialização, bem como da concepção equivocada entre o conceito de socialização e de combinação. Concluiu-se que o fluxo de operações da análise de prestação de contas municipais fica prejudicado pela falta de incentivo às melhores práticas de disseminação do conhecimento tácito entre servidores e à preservação da memória organizacional, tais como: formação de grupos de discussão, mapas de expertises e uso de métodos criativos de análise em rede.
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Kan, Ayse Nur [Verfasser], et Martin [Akademischer Betreuer] Hennenberg. « Effekte des selektiven Phosphodiesterase 10 A Inhibitors TCE- 5005 auf die glattmuskuläre Relaxation der humanen Prostata / Ayse Nur Kan ; Betreuer : Martin Hennenberg ». München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2020. http://d-nb.info/1212795989/34.
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Hadiuzzaman, Md. « Sustainable phytoremediation of chromium (VI) contaminated soil and tetrachloroethylene (PCE)/trichloroethylene (TCE) contaminated groundwater from a Superfund site using sunflower (Helianthus annuus L.) ». OpenSIUC, 2019. https://opensiuc.lib.siu.edu/theses/2614.
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Cr (VI) contaminated soil and tetrachloroethylene (PCE)/trichloroethylene (TCE) contaminated groundwater from a Superfund site were phytoremediated using sunflower (Helianthus annuus L.), a plant with strong adaptability and a hyperaccumulator which possesses great potential for phytoremediation. The Cr (VI) concentration was low of 0.16±0.04 mg/kg in the contaminated soil, and concentrations of PCE and TCE in irrigation water used to reflect influence of groundwater were 2.68±0.27 and 0.80±0.14 mg/L, respectively. For Cr (VI) remediation, physical characteristics, uptake of Cr (VI), bioaccumulation factor (BAF) and translocation factor (TF) were quantified. Analysis of the plants and the soils suggested that Cr (VI) was phytoextracted by roots, then transported from roots to shoots, leaves, seeds and stored within the parts. Both low nitrogen chemical fertilizer and biosolids were used as soil amendments to compare the efficiency of both the amendments on phytoextraction of Cr (VI), and the biosolids treated soil plants showed comparable phytoextraction to low nitrogen fertilizer treated soil plants. During the remediation of Cr (VI) from the co-contaminated soil matrix of both Cr (VI) and PCE/TCE, PCE and TCE were removed >99.9% from the soil matrix while Cr (VI) remediation, and neither PCE nor TCE were detected in effluents, plant tissues and soils after phytoremediation. The remediation of PCE/TCE were accomplished possibly by plant dehalogenation, degradation, plant volatilization, or soil volatilization. Cr (VI) in plant seeds from the contaminated soil plants was 0.36±0.08 mg/kg, which is much lower than the limit of 5.00 mg/kg in soil that will bring health concern. Concerning biodiesel properties, acid value and density were within American Society for Testing and Materials (ASTM) standard limits. Therefore, the produced biodiesel could be used as a potential renewable fuel. In addition, microbial biomass in rhizosphere soil was also studied before and after the remediation. The results showed that after phytoremediation, both biomass carbon and nitrogen increased for both Cr (VI) contaminated and Cr (VI)/PCE/ TCE co-contaminated rhizosphere soil, compared to their control ones. Increase of biomass carbon and nitrogen should be due to and could help the phytoremediation process. In sum, phytoremediation of low concentration Cr (VI) using H. annuus L. with biodiesel production could be a sustainable approach for solving both the environmental pollution problem and the energy crisis issue.
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Mourelle, Jose Indalécio Moreira. « A contribuição das auditorias de natureza operacional na preparação do TCE-RJ para atender às demandas do novo paradigma público administrativo da administração gerencial ». reponame:Repositório Institucional do FGV, 2008. http://hdl.handle.net/10438/3322.
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Previous issue date: 2008It is difficult to be precise as to the history of auditing. Everyone who has the responsibility to verify the legitimacy of economic-financial data and answer to one¿s superior may be considered to be an auditor. Verbal audit reports were used during the time of the Roman Empire. In the current world, public administration applies advanced auditing techniques. Brazil is going through a complex process of change in regard to breaking away from the present bureaucratic administrative model toward the management administrative model. Consequently, the procedures of Brazil¿s Audit Courts are adapting to a new administrative paradigm outlined in this study. Operational audits were analyzed beginning with the theoretical basis and presuppositions in the defined context and compared with the traditional audit model, identifying possible contributions to the management administrative model. This qualitative research seeks to explore such contributions beginning with a critical reading of the research of six operational type audits made in the Federal area by the Audit Court, but does not intend to be strictly classified as a theoretical-critical basis to the extent and depth that a study of this type requires, nevertheless, it intends to approach this position. The results obtained of the systematic reading and criticism of the implemented procedures and the filed final reports of the six examples studied demonstrated that they are a model of operational audits with emphasis on the actions of public administrators ¿ evaluating the aspects of competence, productivity and effectiveness of the public administration ¿ not just to be adequate, but essential to the operation of management administration. The final considerations highlight the basic presupposition of management administration, that is, the accountability of public management based on the results of its management obtained with the use of operational audit techniques, seeking the expected rigor of public management in benefit of society.
É difícil precisar quando começa a história da auditoria. Toda a pessoa que possua função de verificar a legitimidade de fatos econômico-financeiros, prestando contas a um superior, pode ser considerada auditor. O Império Romano já utilizava relatórios verbais de auditoria. Na atualidade, mundial, a administração pública emprega técnicas avançadas de auditoria. O Brasil passa por um complexo processo de mudança no que tange ao rompimento como o modelo de administração burocrática, em direção ao modelo de administração gerencial. Em decorrência, há necessidade de adaptação dos procedimentos dos Tribunais de Contas do país ao novo paradigma administrativo que este estudo delimita, no Tribunal de Contas da União - TCU. O modelo de auditorias operacionais foi analisado a partir de fundamentos teóricos e pressupostos no contexto indicado e comparado ao modelo tradicional de auditoria, identificando possíveis contribuições à administração gerencial. A pesquisa qualitativa busca explorar tais contribuições, realizando uma leitura crítica a partir da pesquisa de seis auditorias de natureza operacional, na área federal, por parte do TCU, sem a pretensão de estar rigorosamente classificada como base teórico-crítica, na extensão e profundidade que uma pesquisa desse tipo requer, ela se aproxima dessa posição. Os resultados extraídos da leitura sistemática e critica dos procedimentos implementados e dos relatórios finais apresentados, segundo os seis casos estudados, revelou ser o modelo de auditorias operacionais, com sua ênfase nas ações dos gestores públicos - avaliando os aspectos de eficiência, eficácia e efetividade da administração pública - não só adequado, mas imprescindível à operacionalização da administração gerencial. As considerações finais destacam pressuposto básico da administração gerencial, isto é, a responsabilização do gestor público fundamentada nos resultados de sua gestão, alcançada com a utilização das técnicas de auditorias operacionais, buscando o rigor esperado da gestão pública em beneficio social
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GAMBACORTA, VALENTINA. « Novel Insights into the Immunobiology of Leukemia Relapse after Allogeneic Hematopoietic Cell Transplantation ». Doctoral thesis, Università degli Studi di Milano-Bicocca, 2020. http://hdl.handle.net/10281/259336.
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Il numero di pazienti affetti da leucemia mieloide acuta (LMA) trattati con trapianto di cellule ematopoietiche allogeniche (TCE-allo) è in costante aumento. L'efficacia terapeutica di questa procedura si basa principalmente sul trasferimento dal donatore al paziente di cellule immunitarie, in grado di riconoscere ed eliminare le cellule tumorali residue. Tuttavia, fino al 50% dei pazienti trapiantati con LMA va incontro a recidiva e la prognosi di questi pazienti rimane estremamente negativa. Pertanto, lo scopo del mio lavoro di tesi era quello di migliorare la comprensione attuale dell'immunobiologia della recidiva post-trapianto, studiando i) come le terapie e la leucemia stessa influenzano la ricostituzione immunitaria, ii) come perfezionare il rilevamento della ricomparsa della leucemia nella fase di malattia minima residua (MMR) e iii) come scoprire i meccanismi molecolari alla base dell’evasione della leucemia dal sistema immune.
In particolare, presenterò per la prima volta i risultati di uno studio prospettico volto a valutare l'utilità clinica di monitorare il chimerismo specifico del paziente sul sangue periferico, anziché sul midollo osseo attualmente utilizzato, impiegando la PCR quantitativa (PCRq) per la diagnosi precoce delle recidive di leucemia dopo trapianto.
In seguito, saranno presentati i risultati di due studi sulla dinamica della ricostituzione delle cellule NK e T dopo il TCE-allo. Entrambi gli studi mirano a comprendere i determinanti dell'insufficienza del sistema immunitario del donatore nel controllo della recidiva della malattia LMA con la possibilità di utilizzare le caratteristiche identificate come biomarcatori per prevedere la recidiva post-trapianto.
Nelle ultime sezioni presenterò dati sia pubblicati che non pubblicati sui meccanismi biologici della recidiva della malattia post-trapianto, riferendo in che modo questa conoscenza possa essere facilmente tradotta in nuove opzioni terapeutiche per combattere la recidiva della malattia.
In queste sezioni sono incluse due recensioni che ho scritto di recente, focalizzate, rispettivamente, sull'immunobiologia della recidiva post-trapianto e sulle attuali terapie epigenetiche all’avanguardia per la LMA e i loro effetti sul sistema immunitario.The number of acute myeloid leukemia (AML) patients cured through allogeneic hematopoietic cell transplantation (allo-HCT) is constantly increasing. The therapeutic effectiveness of this procedure mainly relies on the transfer from the donor to the patient of immune cells, capable of recognizing and eliminating residual tumor cells. Still, up to 50% of transplanted AML patients will eventually relapse, and the prognosis of these patients remains extremely poor. Thus, aim of my thesis work was to improve current understanding on the immunobiology of post-transplantation relapse, by investigating i) how therapies and leukemia itself affect immune reconstitution, ii) how to refine detection of leukemia reappearance at the stage minimal residual disease (MRD), and iii) how to uncover the molecular mechanisms at the basis of leukemia immune evasion. In particular, I will first present the results of a prospective study aiming at evaluating the clinical utility of monitoring patient-specific chimerism on peripheral blood, instead of the currently used bone marrow specimens, employing quantitative PCR (qPCR) for the early detection of leukemia relapses after transplantation. Will next present the results of two studies on the dynamics of recovery of NK and T cells after allo-HCT. Both studies aim at understanding the determinants of donor immune system failure in controlling AML disease recurrence with the potential implications of using the identified features as biomarkers to predict post-transplantation relapse. In the last sections I will present both published and unpublished data on the biological mechanisms underlying post-transplantation disease relapse, reporting how this knowledge can be easily translated in novel therapeutic rationales to combat disease recurrence. Included in these sections are two recent reviews I authored, focused, respectively, on the immunobiology of post-transplantation relapse, and on current state-of-the art epigenetic therapies for AML and their effects on the immune system.
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Oliveira, Roberto Vasconcellos de. « Auditoria operacional : uma nova ótica dos tribunais de contas auditarem a gestão pública, sob o prisma da eficiência, economicidade, eficácia e efetividade, e o desafio de sua consolidação no TCE/RJ ». reponame:Repositório Institucional do FGV, 2008. http://hdl.handle.net/10438/3361.
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Previous issue date: 2008Este estudo objetiva investigar o estágio em que se encontra a auditoria operacional no Tribunal de Contas do Estado do Rio de Janeiro (TCE-RJ), quais as suas modalidades já foram realizadas, os benefícios gerados para a melhoria da gestão do gasto público e os estágios que faltam para ser considerada plenamente implementada. A pesquisa parte do pressuposto de que no TCE-RJ a auditoria operacional ainda se encontra num estágio embrionário, assim como em quase todos os Tribunais de Contas dos demais estados, e necessita avançar mais para alcançar o estágio pleno, uma vez que este tipo de auditoria amplia os seus papéis para além da fiscalização legal das ações governamentais, ao ter que verificar a existência de eficiência, eficácia, economicidade e efetividade nessas ações. Além de proporcionar o fortalecimento dos controles internos e aperfeiçoamento das rotinas e procedimentos dos órgãos auditados e abrir um canal para interação com os gestores públicos. Para materializar os objetivos fixados, levantamos todas as auditorias com enfoque de auditoria operacional ou de avaliação de programas realizados nos últimos dois anos no TCE-RJ, selecionamos então uma delas para uma análise detalhada dos seus conteúdos e benefícios gerados ao aperfeiçoamento da gestão pública. O estudo analisou, ainda, como os técnicos gestores do Tribunal percebem auditoria operacional, a fim de identificar os benefícios que ela traz e os estágios a serem alcançados para a sua plena implementação.
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Craven, Daniel Shawn. « A formal analysis of the MLS LAN : TCB-to-TCBE, Session Status, and TCBE-to-Session Server Protocols ». Thesis, Monterey, California. Naval Postgraduate School, 2004. http://hdl.handle.net/10945/1448.
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Approved for public release; distribution is unlimited.This thesis presents a formal analysis process and the results of applying that process to the MLS LAN: TCB-to- TCBE, Session Status, and TCBE-to-Session Server Protocols. The formal analysis process consists of several distinct stages: the creation of a detailed informal protocol description, analyzing that description to reveal assumptions and areas of interest not directly addressed in the protocol description, the transformation of that description and the related assumptions into a formal Strand Space representation, analyzing that representation to reveal assumptions and areas of interest, and concluding with an application of John Millen's automated Constraint Checker analysis tool to the Strand Space representations under an extremely limited set of conditions to prove certain protocol secrecy properties.
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Craven, Daniel Shawn. « A formal analysis of the MLS LAN : TCB-to-TCBE, Session Status, & ; TCBE-to-Session Server Protocols / ». Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://library.nps.navy.mil/uhtbin/hyperion/04Sept%5FCraven.pdf.
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Chaves, Carlos Bráulio da Silveira. « A razoável duração do processo frente à implantação do processo eletrônico perante o Tribunal de Contas do Estado da Paraíba ». Universidade Federal da Paraíba, 2013. http://tede.biblioteca.ufpb.br:8080/handle/tede/5887.
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Previous issue date: 2013-06-28Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES
Na sociedade da informação, os órgãos julgadores, dentre os quais se inclui o Tribunal de Contas do Estado da Paraíba, são incansavelmente cobrados por métodos cada vez mais eficiente, célere e eficaz no desempenho de suas atribuições evitando transtornos e consequências prejudiciais aos que a eles recorrem para resolução de suas lides. Nessa perspectiva, a egrégio Corte de Contas Paraibana dentro de uma nova ordem processual, procedeu à mudança nos processos sobre a sua jurisdição de procedimentos do suporte em meio físico para o eletrônico, regulamentado pela Lei Complementar estadual n.º 91, de 29 de outubro de 2009. Nessa pesquisa, o caso analisado é um estudo objetivando apreciar se o procedimento eletrônico implantado pelo TCE/PB, contribui, com a diminuição do prazo para julgamento dos processos de prestação de contas, garantindo assim o cumprimento do Princípio da Celeridade Processual e Duração Razoável do Processo. Para concretização da pesquisa se realizou uma pesquisa do tipo exploratória, seguindo uma abordagem quantitativa baseado nos elementos da estatística descritiva, utilizando-se de um estudo de caso tendo como universo o próprio TCE/PB, de onde foram extraídos os dados da pesquisa através do sistema eletrônico de tramitação-TRAMITA. Quanto aos Sujeitos apreciou-se a média de dias para julgamento das prestações de contas anuais das camaras municipais, Prefeituras, órgão integrantes da administração pública Indireta, assembleia legislativa, governo do Estado e Tribunal de Justiça, durante os exercícios de 2008 a 2011. Com isso, foi possível demonstrar, que a implementação do procedimento eletrônico pelo Tribunal de Contas do Estado da Paraíba,tem logrado êxito no cumprimento do Princípio da Celeridade Processual e Duração Razoável do Processo .
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Ellis, James Brian. « The Feasibility of Bioaugmentation for the Remediation of Chlorinated Solvents : A Microcosm Study ». Thesis, Virginia Tech, 2005. http://hdl.handle.net/10919/41386.
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Chlorinated solvents are among the most prevalent contaminants at Superfund sites. Perchloroethylene (PCE) and its degradative byproducts pose a particular problem because of their persistence in the subsurface and their threat to ecological health. In this study, microcosms were used to test the viability of bioaugmentation as a possible remediation strategy at a PCE contaminated site at the Naval Amphibious Base at Little Creek located in Virginia Beach, Virginia. All microcosms were created in duplicate using spatially diverse soils and the bioaugmented series innoculated with a mixed microbial culture provided by the Dr. Frank Loffler. This culture has been found to be capable of completely degrading PCE to ethene. The aqueous ethene concentration was monitored over time. It is clear from the results that bioaugmentation successfully increased the degree of reductive dechlorination over their static counterpart. Without innoculation, shallow static microcosms showed an accumulation of cis-DCE, while deep soils never showed conversion beyond TCE. Shallow bioaugmented microcosms showed the production and loss of vinyl chloride indicated probable complete conversion of PCE to ethene while deep soils showed the production of cis-DCE. These differences in dechlorination between shallow and deep soils indicate a possible disparity in reduction capacity. At day 78, microcosms were spiked with higher concentrations of PCE resulting in a reduction in dechlorination activity. Static microcosms exhibited similar degradative trends but bioaugmented batches experienced dramatic reductions in dechlorination activity indicating possible inhibition effects of native organisms due to concentration or potential toxic shock. It appears that bioaugmentation is a remediation alternative worthy of further study including possible delivery methods, toxicity or inhibition effects of concentration, and fate/transport studies.Master of Science
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Ulsamer, Signe Martha. « A Model to Characterize the Kinetics of Dechlorination of Tetrachloroethylene and trichloroethylene By a Zero Valent Iron Permeable Reactive Barrier ». Digital WPI, 2011. https://digitalcommons.wpi.edu/etd-theses/979.
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"A one dimensional, multiple reaction pathway model of the dechlorination reactions of trichloroethylene (TCE) and tetrachloroethylene (PCE) as these species pass through a zero valent iron permeable reactive barrier (PRB) was produced. Three different types of rate equations were tested; first order, surface controlled with interspecies competition, and surface controlled with inter and intra species competition. The first order rate equations predicted the most accurate results when compared to actual data from permeable reactive barriers. Sensitivity analysis shows that the most important variable in determining TCE concentration in the barrier is the first order rate constant for the degradation of TCE. The velocity of the water through the barrier is the second most important variable determining TCE concentration. For PCE the concentration in the barrier is most sensitive to the velocity of the water and to the first order degradation rate constant for the PCE to dichloroacetylene reaction. Overall, zero valent iron barriers are more effective for the treatment of TCE than PCE. "
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Galizia, Francesco Giovanni. « Modellazione numerica del flusso e del trasporto per l’applicazione integrata di geotermia a bassa entalpia e bonifica ». Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/11881/.
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L’obbiettivo che si pone questo lavoro è quello di combinare in un unico impianto due tecnologie utilizzate per scopi differenti (impianto integrato): un impianto di climatizzazione geotermico a bassa entalpia di tipo open-loop ed un impianto di bonifica delle acque di falda di tipo Pump&Treat. Il sito selezionato per lo studio è ubicato in via Lombardia, nell’area industriale di Ozzano dell’Emilia (BO), ed è definito “Ex stabilimento Ot-Gal”: si tratta di una galvanotecnica con trattamento di metalli, dismessa alla fine degli anni ’90. Durante una precedente fase di caratterizzazione del sito condotta dalla ditta Geo-Net Srl, sono stati rilevati in falda dei superamenti delle CSC previste dal D.lgs. 152/2006 di alcuni contaminanti, in particolare Tricloroetilene (TCE) e 1.1-Dicloroetilene (1.1-DCE).
Successivamente, nel 2010-2011, Geo-net Srl ha eseguito una parziale bonifica delle acque di falda attraverso l’utilizzo di un impianto Pump and Treat. Grazie a tutti i dati pregressi riguardanti i monitoraggi, le prove e i sondaggi, messi a disposizione per questo studio da Geo-Net Srl, è stato possibile eseguire una sperimentazione teorica, in forma di modellazione numerica di flusso e trasporto, dell’impianto integrato oggetto di studio. La sperimentazione è stata effettuata attraverso l’utilizzo di modelli numerici basati sul codice di calcolo MODFLOW e su codici ad esso comunemente associati, quali MODPATH e MT3DMS. L’analisi dei risultati ottenuti ha permesso di valutare in modo accurato l’integrazione di queste due tecnologie combinate in unico impianto. In particolare, la bonifica all’interno del sito avviene dopo 15 dalla messa in attività. Sono stati anche confrontati i costi da sostenere per la realizzazione e l’esercizio dell’impianto integrato rispetto a quelli di un impianto tradizionale. Tale confronto ha mostrato che l’ammortamento dell’impianto integrato avviene in 13 anni e che i restanti 7 anni di esercizio producono un risparmio economico.
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Pramik, Paige N. « Optimization and Analysis of a Slow-Release Permanganate Gel for Dilute DNAPL Plume Remediation in Groundwater ». Ohio University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1493742241376089.
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Mukherjee, Dibyendu. « Degradation of Chlorinated Ethenes in Mesocosms Simulating a Constructed Wetland, at WPAFB, Ohio ». Wright State University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=wright1206563697.
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Freire, Sérgio Manuel Silva. « A TCP-layer name service ». Master's thesis, Universidade de Aveiro, 2008. http://hdl.handle.net/10773/1941.
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Mestrado em Engenharia Electrónica e TelecomunicaçõesA Internet ´e hoje a maior rede mundial mas para al´em disso, ´e tamb´em e essencialmente um meio de disponibiliza¸c˜ao de acesso a conhecimento e a servi¸cos diversos. Tendo como base o protocolo de encaminhamento IP, ´e poss´ıvel endere¸car e comunicar com pessoas, servi¸cos, m´aquinas e dispositivos variados. Uma forma de comunica¸c˜ao usual assenta no protocolo TCP, que permite um di´alogo bidirecional entre servi¸cos locais e/ou remotos, com tolerˆancia e recupera¸c˜ao face a erros e perda de pacotes. No TCP, um servi¸co ´e identificado pelo n´umero do porto a que fica associado, o que tem algumas consequˆencias menos positivas. A mais ´obvia ´e o varrimento de portos (port scanning) para posteriores tentativas de ataque a vulnerabilidades nos servi¸cos identificados/associados a esses portos. Esta tese pretende extender o conceito de endere¸camento dum determinado servi¸co associando-o primordialmente a um nome, ou seja, dotar o TCP dum servi¸co pr´oprio de resolu¸c˜ao de nomes. A fase de estabelecimento da liga¸c˜ao TCP, baseada no three-way handshake, pode ser substancialmente evolu´ıda para suportar mecanismos de resolu¸c˜ao e de autentica¸c˜ao. A solu¸c˜ao encontrada tem a seguran¸ca sempre como um aspecto presente e essencial, por forma a combater diversos tipos de ataque. A resolu¸c˜ao de nomes sugerida pode ser integrada com mecanismos de autentica¸c˜ao/valida¸c˜ao atrav´es do uso de dom´ınios de interpreta¸c˜ao (DOI - domain of interpretation). Os DOIs possibilitam uma forma flex´ıvel de adicionar mecanismos de resolu¸c˜ao e autentica¸c˜ao mais ou menos complexos ao pr´oprio estabelecimento da liga¸c˜ao TCP. ABSTRACT: Internet is the largest network deployed worldwide but besides that it’s also and essentially a way of accessing and distributing knowledge and a way to to interact with services. By using the IP routing protocol it’s possible to address and communicate with other persons, services, hosts or network enabled devices. An usual way for establishing a dialogue between internet endpoints is based on the TCP protocol, permitting a bidirectional, reliable and fault-tolerant data exchange. In TCP a service is identified by an associated port number which by itself has some less positive consequences. The obvious one consists on guessing which services are available by find out the available port numbers (port scanning) so that attacks on service vulnerabilities can take place. The purpose of this thesis is to extend the current concept used for addressing TCP services by associating them with names, or simply to provide TCP an in-band name resolution. The connection establishment phase, three-way handshake, can be improved in order to support simple name resolution mechanisms or even complex authentication. Security aspects towards avoiding attacks was a major concern that is present in the foundations of the proposed architecture. The name resolution model can be integrated with several mechanisms for authentication/validation, implemented as logic defined within domains of interpretation (DOI). DOIs allow a flexible and extensible way for adding those mechanisms to the connection establishment procedures of TCP.
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Alberti, Paolo. « Analisi per via simulativa del protocollo tcp a ritrasmissione asimmetrica anticipata su wifi ». Master's thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amslaurea.unibo.it/6210/.
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Hu, Xuenan, et Tingxian Zhou. « TCP EXTENSIONS FOR A SATELLITE CHANNEL ». International Foundation for Telemetering, 2003. http://hdl.handle.net/10150/607480.
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International Telemetering Conference Proceedings / October 20-23, 2003 / Riviera Hotel and Convention Center, Las Vegas, NevadaThe usage of Internet is explosively growing. Satellite has become a choice solution breaking through the bandwidth bottleneck and the terrain limit. TCP, which is well suited to terrestrial networks, performs poorly on a satellite channel. The reduced efficiency and QoS(Quality of Service) mainly result from three characteristics of a satellite link: higher bit error rate, the high latency, asymmetry. For this issue, the paper presents connection-subsection network architecture, and brings forward S-TCP based on the architecture.
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Yupanqui, Zaa Carmen Lourdes. « Dechlorinating and Iron Reducing Bacteria Distribution in a Trichloroethene Contaminated Aquifer ». DigitalCommons@USU, 2008. https://digitalcommons.usu.edu/etd/41.
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The Operable Unit 5 (OU 5) area of Hill Air Force Base currently has two trichloroethene-contaminated groundwater plumes underneath residential areas in Sunset and Clinton, Utah. Bioremediation by biological reductive dechlorination can be an important mechanism for the removal of chlorinated compounds from the plumes. The presence of suitable bacteria to carry on reductive dechlorination is the key in the bioremediation process. The goal of this study was to determine the distribution and population density of the 16S rRNA genes of Bacteria, Dehalococcoides ethenogenes, Desulfuromonas michiganensis, Geobacter spp and Rhodoferax ferrireducens-like bacteria, as well as the functional genes trichloroethene reductive dehalogenase (tceA) and vinyl chloride reductase gene (vcrA). This study also evaluated the influence of the physical-chemical properties of the OU 5 aquifer material on the observed bacterial distribution. Twenty OU 5 soil cores were obtained from a 14-ha area that included a trichloroethene (TCE) plume. DNA was extracted from each core. Molecular analysis with qRT-PCR was used to quantify the densities of the mentioned 16S rRNA and functional genes. Separately, total arsenic and iron in the II and II+III oxidation states were extracted by two methods (HCl and hydroxylamine HCl in HCl) in each core. Concentrations of TCE, cis-dichloroethene (cis-DCE), vinyl chloride (VC) and ethane in well water were included. Dehalococcoides population density was low and its distribution was uneven with densities lower than 3.2x104 copies/g (detection limit of 2.5x103). D. michiganensis distribution was not uniform but was clustered near the TCE-source area with densities of 7.9x103-1x105 copies/g (detection limit of 6.3x103). Geobacter spp. distribution was uneven but broader, with densities of 4x103-1.6x106 copies/g (detection limit of 3.2x103). The vcrA gene distribution was relatively uniform and broad. Densities were the lowest measured (detection limit of 63 copies/g). TceA was measured in two cores with densities close to detection limit of 1.6x103 copies/g. Rhodoferax ferrireducens-like bacteria had a broader distribution with the highest densities of 1.6x106-1.3x108 copies/g (detection limit of 7.9x103). Total Bacteria were measured in all cores with densities 3.2x104-3.2x106 copies/g (detection limit of 1x103). Three multivariate statistical methods were used to determine the effect of physical-chemical properties on the target gene distributions. Cluster and discriminant analysis selected five properties (pH, sand and silt content, NO3--N and NH4+-N) as the most discriminating factors among thirty-one physical-chemical properties. However, no effect in the bacterial distribution was observed. The tree classification method identified nine variables that described higher or lower densities of the target genes. Variables such as Bacteria, Fe(II+III) (by hydroxylamine HCl in HCl), organic matter and cis-DCE were selected by the method.. All methods agreed on the selection of pH and sand content as the physical/chemical factors most influencing in the bacterial distribution. Based on the findings of low densities of dechlorinating bacteria and dechlorinating-associated functional genes, low available carbon donor and sandy mineral composition, the partial TCE-dechlorination at this site can be ascribed to the nature of the site and incomplete set of required factors for complete reductive dechlorination.
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Castaño, Monsalve Beatriz. « Características Clínicas y Evolución Psicopatológica de los cambios conductuales secundarios a Traumatismo Cráneo encefálico ». Doctoral thesis, Universitat Autònoma de Barcelona, 2014. http://hdl.handle.net/10803/133263.
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El traumatismo cráneo encefálico (TCE) moderado y severo produce una gran variedad de alteraciones que pueden ser físicas, cognitivas y conductuales.
Los cambios conductuales y emocionales son una de las secuelas más devastadoras del TCE. Diferentes trabajos señalan la disminución que provocan en la calidad de vida del paciente; de sus capacidades vitales, laborales, relacionales y afectivas; pero también el gran impacto que tienen en la familia ya que generan situaciones de gran dependencia que exigen una reorganización con la consiguiente sobrecarga del cuidador principal.
El presente estudio fue realizado con pacientes afectos de traumatismo cráneo encefálico moderado y severo y sus familiares, con el objetivo de valorar los síntomas conductuales, su evolución en el tiempo y la repercusión que estos tienen en la funcionalidad del paciente y en la sobrecarga del cuidador.
Se estudió un grupo de 150 pacientes mediante mediciones transversales y también mediante un seguimiento longitudinal a un año de un sub-grupo de 50 individuos.
Las valoraciones se realizaron mediante entrevista clínica utilizando criterios DSM-IV-TR; así como a partir de la administración de escalas neuroconductuales tales como el Inventario Neuropsiquiátrico (NPI) y la Escala Comportamental de Sistemas Frontales (FrSBe).
Los resultados permiten afirmar que alrededor de un 90% de los individuos, desde los primeros seis meses del traumatismo y hasta ocho años después de la lesión, presentan algún grado de psicopatología. Los síntomas predominantes son la apatía, la irritabilidad, la desinhibición y las alteraciones de la alimentación.
Síntomas de tipo psicótico como alucinaciones, delirios y comportamientos motores aberrantes fueron infrecuentes en nuestra población.
La valoración subjetiva de los familiares indica que hasta en un 32% de los individuos aparecen cambios positivos en la personalidad como ser más cariñoso, amable, abierto, expresivo de las emociones y sociable; pero también ser menos impulsivo e irritable.
Los factores de riesgo para desarrollar alteraciones conductuales fueron la duración de la amnesia postraumática y la historia de consumo de tóxicos.
En nuestro estudio, el diagnostico clínico de cambio orgánico de la personalidad según criterios DSM-IV-TR se correlacionó con la psicopatología medida con la escala NPI.
Un resultado consistente fue la repercusión negativa que tienen las alteraciones conductuales en los familiares de los pacientes con TCE moderado y severo.
Debido a la elevada prevalencia de psicopatología en estos pacientes y a la sobrecarga que genera en los familiares, se recomienda hacer una búsqueda activa de los trastornos conductuales en los servicios de daño cerebral y a realizar una adecuada intervención como parte del proceso integral neurorrehabilitador.The moderate and severe traumatic brain injury (TBI) produces a variety of impairments that can be physical, cognitive and behavioral. Behavioral and emotional changes are one of the most devastating consequences of TBI. Different studies show that the behavioral disorders cause a decrease in the quality of life for patients, their life skills, but also their labor and social integration. They have a great impact on the family and caregiver burden because the high dependency situations that generate. This study was conducted with moderate and severe TBI patients and their families, with the aim of assessing the behavioral symptoms, their evolution over time and the impact they have on the functionality of the patient and caregiver burden. We studied a group of 150 patients with transverse measurements and also by a one-year longitudinal follow-up of a sub-sample of 50 subjects. The assessments were performed by clinical interview using DSM- IV -TR , as well as the administration of neurobehavioral scales such as the Neuropsychiatric Inventory ( NPI) and the Frontal Systems Behavior Scale (FrSBe). The results support that about 90 % of individuals, from the first six months after the injury and up to eight years after the injury, present some degree of psychopathology. The predominant symptoms are apathy, irritability, disinhibition and eating disorders. Psychotic symptoms such as hallucinations, delusions and aberrant motor behaviors were infrequent in our population. Subjective evaluation of the family members indicates that up to 32 % of individuals have some positive changes in personality as being more loving, kind , open, expressive of emotions and sociable, but also be less impulsive and irritable. Risk factors for developing behavioral disorders were the duration of posttraumatic amnesia and history of drug and alcohol consumption. In our study, the clinical diagnosis of organic personality change according to DSM -IV-TR correlated with psychopathology as measured by the NPI. A consistent finding was the negative impact that the behavioral disorders produce in relatives of patients with moderate and severe TBI. Due to the high prevalence of psychopathology in these patients and the burden generated to the family, it is recommended to actively search behavioral disturbances in brain injury services and appropriate intervention as part of comprehensive neurorehabilitation.
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Lönndahl, Henrik. « Introducing TCP in a 3G load generator ». Thesis, Linköping University, Department of Computer and Information Science, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-15299.
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In this thesis we investigate, implement and evaluate a solution for introducing the TransmissionControl Protocol (TCP) into the software of a load generator. The load generator is a simulator usedfor simulating end-user generated activities in the Universal Mobile Telecommunication System(UMTS) network. The purpose of simulating traffic on the network is in this case to verify thefunctionality and robustness of the Radio Network Controller (RNC) node within the UMTSnetwork.TCP is a protocol that provides reliable data transfer over unreliable underlying networkprotocols. It is used as the main transport protocol of the Internet, thus it is also used in the UMTSnetwork in order to provide connectivity for user equipment, such as 3G mobile phones, to servicesover the Internet. For the load generator to be able to produce more realistic traffic scenarios is itdesirable to give it the ability to use TCP.This thesis presents a solution of the problem where an open-source implementation of the TCPfunctionality was chosen, ported to the running platform of the load generator and then tested in asimulated test environment. The choice of the open source implementation of TCP was made byperforming an investigation of available options. In the investigation an open source TCP/IP stackcalled lwIP was chosen. lwIP was then ported to the running platform of the load generator bywrapping and modify the source code. The tests of the ported TCP implementation were made in asimulated test environment with focus on testing basic TCP functionality. The tests showed that theTCP implementation produced provided the basic functionality that was asked for.
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Ding, Yiqun. « Solver for TCP flows in a network ». Thesis, University of Ottawa (Canada), 2004. http://hdl.handle.net/10393/26624.
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Quality of Service (QOS) of a congested network can be evaluated by some key factors such as packets discarding rate, queueing delay and the throughput of a bottleneck buffer. A network designer needs to predict these parameters in order to dimension a network properly.
This thesis developed a solver for predicting the stability of a TCP network when servers implement Active Queue Management (AQM) schemes. The solver analyzes two AQM schemes. One is Random Early Detection (RED) and the other is Dynamic Random Early Detection (DRED). We verify the analysis of the solver through the simulation of a small network with multiple bottlenecks carrying a large number of TCP connections.
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Pyk, Axel. « Multipath TCP : Performance in a LTE Environment ». Thesis, Linköpings universitet, Databas och informationsteknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-129123.
Texte intégralRésumé :
The market penetration of mobile access devices with multiple network interfaces has increased dramatically over the last few years. As a consequence, the quest for a widespread multi-path transport protocol that takes advantage of all available interfaces simultaneously to increase data throughput and improve robustness, has received considerable attention. One prominent protocol introduced by the IETF is Multipath TCP (MPTCP). MPTCP is an extension to the predominant single-path transport protocol, the Transport Control Protocol (TCP) that enables multihomed devices to aggregate available resources transparently to the applications. Combining multiple radio access technologies, like LTE and Wi-Fi, with diverse characteristics in terms of transmission rates and fluctuations opens for novel challenges that may disrupt and even harm the data throughput. Therefore MPTCP must take path heterogeneity into account. For MPTCP to supersede single-path TCP it is required that MPTCP always achieve at least the throughput of the best individual TCP path. This thesis investigates if MPTCP with uncoupled congestion control fulfills this condition, and if so, how much it improves the throughput. By examining the protocol in a deterministic emulated environment defined by the characteristics of LTE, we conclude two key factors impacting the outcome: the download size and the difference in characteristics between the paths. Our experiments show that MPTCP overall fulfills this task, especially during path homogeneity with near aggregated results. But we also show that MPTCP may decrease data throughput with 16% compared to TCP during path heterogeneity. Hence MPTCP does not always fulfill the goal of throughput. We therefore conclude further intelligence is needed for the packet scheduling mechanism to avoid throughput degradation in the initial phase of a transmission.
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Pedrini, Mirko. « TCP a ritrasmissione asimmetrica anticipata su WiFi ». Master's thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amslaurea.unibo.it/4993/.
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Di, Chiappari Alain. « TCP a ritrasmissione asimmetrica anticipata su WiFi ». Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amslaurea.unibo.it/6625/.
Texte intégralRésumé :
Nell'ambito dell'architettura RWMA per l'aumento della qualità del servizio in ambiente wireless, si colloca la ritrasmissione asimmetrica anticipata su wifi.
Lo scopo è migliorare ed ottimizzare la comunicazione nel livello datalink tra Access Point e Nodo Mobile per quanto riguarda le connessioni TCP.
Il progetto è sviluppato nell'ambiente simulativo OMNET++/INET.
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Pacholik, Lucy C. « USE OF FUNCTIONALIZED BIMETALLIC MEMBRANES FOR TREATMENT OF CONTAMINATED GROUNDWATER AT A HAZARDOUS WASTE SITE IN KENTUCKY ». UKnowledge, 2019. https://uknowledge.uky.edu/ce_etds/83.
Texte intégralRésumé :
Providing access to clean drinking water will continue to be a challenge for civil engineers for generations to come. Since many communities around the world rely on groundwater as a source of drinking water, remediation technologies must be implemented at sites where groundwater contamination exists due to years of mismanagement of hazardous waste. Using nanosized zero-valent metals such as iron and zinc embedded within and on the surface of functionalized (PAA) membrane filters has shown to be an effective dechlorination technique for contaminated groundwater. Introducing a noble metal such as Pd or Ni increases reaction rates by acting a catalyst for the dechlorination reaction.
This study focuses on the treatment of contaminated groundwater at a hazardous waste site in Louisville, Kentucky. Once a chlorinated organic chemical manufacturing plant, the site now operates a treatment system for the contaminated groundwater to prevent migration into the nearby Ohio River. A portable membrane treatment system, built at the University of Kentucky, incorporates this functionalized bimetallic membrane technology for treatment of the groundwater found at the former manufacturing plant. Three bench scale tests were performed with membrane treatment system using DI water spiked with the chemical trichloroethylene (TCE). Results showed that using the functionalized Fe/Pd membranes significant decreased TCE concentrations over time. While further tests should be conducted to verify the results of the preliminary bench-scale tests, the membrane treatment system shows potential for use at the hazardous waste site in Kentucky.
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Montgomery, David Rogers 1976. « A fast Prolac TCP for the real world ». Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/80556.
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Nightingale, Todd 1979. « A simulation study of reordering-resilient TCP enhancements ». Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/29693.
Texte intégralRésumé :
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2003.Includes bibliographical references (leaves 57-59).
TCP traffic makes up a large portion of the Internet's load. The throughput TCP connections are able to obtain depends heavily on the underlying network providing in-order packet delivery. IP networks do not guarantee in-order delivery, but the design of hardware, networks, protocols have been influenced by TCP's in-order requirement. Despite this the Internet today does reorder packets on some links. More importantly, more throughput could be achieved if techniques such as multipath routing could be used. Unfortunately, the parallelism in these schemes results in packet reordering and a resulting TCP performance loss. This work examines methods for allowing TCP connections to obtain high throughput in the presence of packet reordering. We review the existing proposals, describe a new, receiver based proposal, and provide a detailed simulation-based evaluation. In this thesis we present results which show that our modified receiver with an unmodified Reno sender was able to perform as well or better than any of the other proposed solutions. In addition, Eifel is able to consistently out perform DSACK despite using much less packet overhead and internal state.
by Todd Nightingale.
M.Eng.
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Massey, Dale P. « TCP/IP Remote Control of a Ground Station ». International Foundation for Telemetering, 1998. http://hdl.handle.net/10150/609652.
Texte intégralRésumé :
International Telemetering Conference Proceedings / October 26-29, 1998 / Town & Country Resort Hotel and Convention Center, San Diego, CaliforniaSatellite tracking ground stations are under continuous pressure to automate. Autonomy is generally the desired goal, but if the ground stations are in a Commercial Ground Network(CGN) setup to support many missions simultaneously, remote control of such stations is of much more importance. The proliferation of Low Earth Orbiting (LEO) science, earth resources and eventually global communications satellites either in orbit or planned, requires a much lower cost methodology for ground support. A CGN of TCP/IP remotely controlled ground stations lowers much of the manpower that was historically required to operate such stations. This paper will cover the remote control aspects needed for a satellite ground tracking station and offer a unique remote control topology utilizing TCP/IP.
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Pitko, Erik. « Převodník mezi protokoly Modbus-RTU a Modbus-TCP ». Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2021. http://www.nusl.cz/ntk/nusl-445515.
Texte intégralRésumé :
The main objective of this work is to inform the reader of the communication protocols Modbus TCP and Modbus RTU and create an embedded device based on the microprocessor STM32 capable of conversion between Modbus RTU and Modbus TCP protocols. The device should be capable of simple first run configuration with simple user interface.
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Viklander, Johan. « Simulation of a TCU Node on a Virtual CAN Bus ». Thesis, Umeå universitet, Institutionen för fysik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-119477.
Texte intégralRésumé :
Electrical Control Units (ECUs) communicating on Controller Area Networks (CAN buses) are widely used in vehicle electrical systems. Being able to simulate these circuits and buses in a computer environment is beneficial during the development phase when access to test benches is limited and expensive. Simulations can also give a very detailed view of the entire system which in an ordinary lab setup would be practically impossible. BAE Systems Örnsköldsvik SIL Lab department works in the simulation environment CANoe supplied by Vector Informatik GmbH. BAE Systems have a simulation model of their central communication circuit. Unlike the less complicated circuits on the bus it cannot be integrated in the CANoe simulation environment. The less complicated nodes are modelled to usable extent but this is not possible with the central communication circuit. This report presents a possible solution to facilitate communication between the simulated ECU and the CANoe simulation environment under certain real-time constraints. A solution was achieved with a combination of an external program which handled shared memory with callback functions and Vector's Fast Data eXchange protocol (FDX).
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Lacroix, France. « T cell receptor (TCR) for antigen : A comparative study between the TCR alpha/beta and TCR gamma/delta subsets in noninfected and HIV infected individuals ». Thesis, University of Ottawa (Canada), 1993. http://hdl.handle.net/10393/6937.
Texte intégralRésumé :
HIV infection is associated with characteristic quantitative changes in T-lymphocyte subsets: progressive depletion of the CD4$\sp{+}$ T-lymphocytes and an increased number of the CD8$\sp{+}$ T-lymphocyte. In this study, I report the results of a flow cytometric analysis of the expression of CD3, CD4, CD8, TCR$\alpha$/$\beta$, and TCR$\gamma$/$\delta$ antigens. I observed that CD8$\sp{+}$TCR$\alpha$/$\beta\sp{+}$ cells increased early in HIV disease (p 0.01) whereas the frequency of CD4$\sp{+}$TCR$\alpha$/$\beta\sp{+}$ cells was relatively unchanged. The frequency of TCR$\gamma$/$\delta\sp{+}$ cells remained unchanged. However, the mean fluorescence intensity (MFI), reflecting surface antigenic density, varied and allowed a clear distinction among different stages of infection. The expression of three activation markers (HLA-DR, CD38, CD57) was clearly increased in HIV infected individuals. The TCR$\alpha$/$\beta$ subset showed more substantial variation for activation markers. In the TCR$\gamma$/$\delta$ subset, the CD57 antigen seemed to be the most affected by the state of the disease and showed the greatest increase (p 0.01). (Abstract shortened by UMI.)
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GUPTA, RAHUL. « A TCP ANALYSIS : IMPACT OF RECEIVER PERCEIVED INFORMATION ON THE PERFORMANCE OF TCP OVER Ad Hoc NETWORKS ». University of Cincinnati / OhioLINK, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1037305279.
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Gupta, Rahul. « A TCP analysis impact of receiver perceived information on the performance of TCP over ad hoc networks / ». Cincinnati, Ohio : University of Cincinnati, 2002. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=ucin1037305279.
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Holl, David J. « A performance analysis of TCP and STP implementations and proposals for new QoS classes for TCP/IP ». Link to electronic thesis, 2003. http://www.wpi.edu/Pubs/ETD/Available/etd-0501103-111419.
Texte intégralRésumé :
Thesis (M.S.)--Worcester Polytechnic Institute.Keywords: TCP; RED; satellite; PEP; STP; performance enhancing proxy; segment caching; IP-ABR; Internet; bandwidth reservation; IP-VBR; congestion avoidance; bandwidth sharing. Includes bibliographical references (p. 98-99).