Anomaly Detection
Mostrando 13-24 de 28 artigos, teses e dissertações.
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13. Vinasse influence detection in soil electrical resistivity by geophysics data analysis : a case study at Sepe, Tiaraju, settlement of landless agricultural laborers, SP / Detecção da influencia da vinhaça na resistividade do solo atraves da analise de dados geofisicos : um estudo de caso no assentamento Sepe, Tiaraju, SP
The vinasse, a waste produced in the proportion of 13 liters for each liter of alcohol. It has a high potential of polluting groundwater and superficial water resources, changes the soil behaviour and can also develop sanilization problems. This work aims to evaluate the efficiency of the DC-resistivity method in detecting and mapping anomalies caused by, in
Publicado em: 2008
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14. Airborne geophysical and geological data applied to the selection of groudwater potential areas in crystalline rocks of Ceara, Brazil / Dados aerogeofisicos e geologicos aplicados a seleção de areas favoraveis para agua subterranea no dominio cristalino do Ceara, Brasil
The location of water well in Northeast Brazil is usually based on the interpretation of structural lineaments in aerial-photographs and electromagnetic and electrical resistivity ground geophysics surveys. However, the success of these techniques is variable, and the small coverage area is another limitation. This Thesis favors a different approach, the use
Publicado em: 2008
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15. Uma metodologia para detecção de ataques no tráfego de redes baseada em redes neurais / A Methodology for attack detection in the network traffic based on neural networks
A fim de precaver-se contra situações inesperadas e indesejadas e impedir a proliferação dos ataques continuamente lançados contra diferentes alvos na rede, são implantados mecanismos de proteção, tais como firewalls, antivírus, sistemas de autenticação, mecanismos de criptografia e sistemas de detecção de intrusão nos ambientes de rede por tod
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/05/2007
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16. Electric power system protection considering safety aspects of the communication network / Proteção de sistemas elétricos considerando aspectos de segurança da rede de comunicação
Modern world is more connected each day by all technological means available. This allows more people to communicate, turning the virtual communication road obligatory to the survival of small, medium and large companies, whether public or private. The great technological advance of the 20th century was the large use of the PCs (personal computer), usually c
Publicado em: 2007
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17. A Methodology for attack detection in the network traffic based on neural networks / Uma metodologia para detecção de ataques no tráfego de redes baseada em redes neurais
A fim de precaver-se contra situações inesperadas e indesejadas e impedir a proliferação dos ataques continuamente lançados contra diferentes alvos na rede, são implantados mecanismos de proteção, tais como firewalls, antivírus, sistemas de autenticação, mecanismos de criptografia e sistemas de detecção de intrusão nos ambientes de rede por tod
Publicado em: 2007
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18. DetecÃÃo de variantes somaclonais de bananeira âPrata AnÃâ (AAB) micropropagada / Detection of somaclonal variants of micropropagated banana plants âPrata Anaâ (AAB)
The in vitro culture, also known as micropropagation, is a technique used in the attainment of plants with commercial value. This technique is useful in achievement for free pathogenic plants and to maintain the genetic characteristics of the mother plant. However, the micropropagation can lead to phenotypic changes in the plants, known as somaclonal variati
Publicado em: 2007
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19. Somatic cytogenetic and azoospermia factor gene microdeletion studies in infertile men
The objective of the present study was to determine the frequency of somatic chromosomal anomalies and Y chromosomal microdeletions (azoospermia factor genes, AZF) in infertile males who seek assisted reproduction. These studies are very important because the assisted reproduction techniques (mainly intracytoplasmic sperm injection) bypass the natural select
Brazilian Journal of Medical and Biological Research. Publicado em: 2006-04
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20. Detecção de intrusão em redes de computadores com estatísticas PDF e classificadores neurais
This work is a study about architectures, methods and results on computer networks intrusion detection to avoid Denial-of-Services attacks. The main techniques used were: packet-oriented window observation, structured hierarchical processes, anomaly based network intrusion detection by monitoring several network traffic parameters simultaneously. The Probabi
Publicado em: 2006
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21. Detection of determinant genes and diagnostic via Item Response Theory
This work presents a method to analyze characteristics of a set of genes that can have an influence in a certain anomaly, such as a particular type of cancer. A measure is proposed with the objective of diagnosing individuals regarding the anomaly under study and some characteristics of the genes are analyzed. Maximum likelihood equations for general and par
Genetics and Molecular Biology. Publicado em: 2004
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22. Estudo do cariotipo constitucional e dos tecidos envolvidos na lesão de crianças portadoras de defeito do tubo neural (DTN) por meio de analise citogenetica convencional e FISH
The association between chromosomal abnormalities, specially aneuploidies and neural tube defects (NTDs) is well known, principally when NTD is not the only malformation present. Recently, research in animal models, using fluorescence in situ hybridization (FISH) identified aneuploidy in neural tissues. The aims of this work were to identify the frequency of
Publicado em: 2004
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23. Classificação e monitoramento fenológico foliar da cobertura vegetal na região da floresta Nacional do Tapajós - Pará, utilizando dados multitemporais do sensor "thematic mapper" (TM) do Landsat / Phenology foliar classification and monitoring the vegetation cover in the Tapajós National Forest region Pará State, utilization multitemporal data from Landsat Thematic Mapper (TM) sensor
The relative importance of accuracy in forest cover mapping is given by the necessity to obtain improvement in the elaboration of a management plan of natural resources and in the definition of priority areas for conservation, as well as in landscape analysis. Other aspect that has raised even more interest in the scientific community is concerned to modelin
Publicado em: 2002
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24. Fetal echocardiography in detecting anomalous pulmonary venous connection: four false positive cases.
Prenatal detection of congenital heart disease is possible from the 16th week of pregnancy, the ideal time being the mid-trimester, when most cardiac abnormalities can be detected. However, identification of anomalous pulmonary venous connection is difficult before birth and the sensitivity of fetal echocardiography in detecting this anomaly is low. Four cas