The present thesis focuses on the issue of assessing the reliability of the operator while operating CNC laser Adige LaserTube 8. The objective of this study was to perform a review of literature, which concerns the issue of assessing the reliability of the human factor. On the basis of the analysis was to choose the appropriate method in order to identify and assess risks in their workplace and then to assess the reliability of the operator. The practical part is to propose suitable measures to increase the reliability of the operator.

Made available in DSpace on 2014-12-17T15:30:51Z (GMT). No. of bitstreams: 1 RejaneBL.pdf: 1880719 bytes, checksum: ed2067cb8297e83d902f9376183bbd03 (MD5) Previous issue date: 2006-05-19 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / This work is intended to bring a contribuition to the verification of the prevalance of malocclusion in the deciduous, permanent and mixed dentition in the student population in the city of Natal, Brazil. In this purpose, a sectional study of infantiles aging 5, 8 and 12 years old was carried out. The average prevalance of malocclusions in the group as a whole was 76,5%. Considering the different dentitions separately, the study showed malocclusion prevalence as follows: Deciduous Dentition 75,5%; Mixed Dentition 84% and Permanent Dentition 70,5%. The most common malocclusion cases found in the deciduous dentition were openbite (20.6%); overbite (16.6%) and maxillary overjet (14,7). Mixed Dentition: the most commonly found occlusional malfunctions in this dentitional phase were maxillary overjet (33,8%); crowding (28,3%), and mandillary discrepancy (19,9%). In the univaried analysis, he application of the Chi square test of independence, (significance 5%), has indicated a meaningful association of the variables social class (p=0,019), primata space (p = 0,036), habits (p= 0,002) and time-and-habit (P=0,03). The same test on the permanent dentition group revealed a significant association for the independent variables, as follows: Social class (p=O,OOO), School (p=O,OOI), Income (p=O,OOO), housing standard (p=0,001), facial pattem (p=0,004), caries record (p=0,031). No significant association was found in the mixed dentition. The Logistic Regression analysis on the deciduous dentition has shown that income, ethnicity, habit and canine relationship constitute factors of risk regardless of the other variables. As for the permanent dentition, only Facial Pattem was pointed as a factor of risk for the formation of malocclusion / O prop?sito deste estudo foi verificar a preval?ncia de oclusopatias, bem como dos seus determinantes nas denti??es dec?dua, mista e permanente na cidade de Natal/RN. Para tanto, foi realizado um estudo seccional com crian?as de 5, 8 e 12 anos (n=765). A preval?ncia geral de oclusopatias, observando-se as tr?s denti??es, foi de 76,5%. No que se refere ? preval?ncia para cada denti??o obteve-se 75,5% para a denti??o dec?dua, 84,8% e 70,5% para as denti??es mista e permanente, respectivamente. As principais oclusopatias encontrada na denti??o dec?dua foram a mordida aberta anterior (20,6%), seguida da mordida profunda (16,6%) e sobressali?ncia positiva (14,7%). Em rela??o ? denti??o mista, os problemas oclusais encontrados foram a sobressali?ncia positiva (33,8%), apinhamento (28,3%) e discrep?ncia maxilar (20,7%). Essa predomin?ncia permanece inalterada na denti??o permanente e, dessa forma, teve-se: sobressali?ncia positiva (27,4%), apinhamento (22,8%) e discrep?ncia maxilar (19,9%). Na an?lise univariada, atrav?s do teste Qui-quadrado (n?vel de signific?ncia de 5%), verificou-se associa??o significativa em rela??o ? presen?a de oclusopatias na denti??o dec?dua, para os fatores de risco: classe econ?mica (p=0,019), espa?o primata (p=0,036), rela??o dos caninos (p=0,000), h?bitos (p=0,002) e tempo e h?bito ?p=0,03). Para a denti??o permanente, associa??o significativa com a presen?a de oclusopatias, foi encontrada para classe econ?mica (p=0,000), escola (p=0,001), renda (=p0,000), tipo de moradia (p=0,001), padr?o facial (p=0,004) e experi?ncia de c?rie (p=0,031). N?o houve associa??o signifiacativa entre nenhum fatores de risco, e a presen?a de oclusopatias na denti??o mista. Na an?lise de regress?o log?sitica, para a denti??o dec?dua, observou-se que, renda, etnia, h?bito e rela??o dos caninos constitu?ram fator de risco, independente das outras vari?veis estudadas. Na denti??o permanente, apenas o padr?o facial (P= 0,025), foi fator de risco para o desenvolvimento de oclusopatias. Os achados desse estudo revelaram que, tanto a preval?ncia quanto a necessidade de tratamento apresentaram percentuais elevados e, portanto faz-se necess?rio a cria??o de estrat?gias para minimizar esse problema, bem como evitar exposi??es aos fatores de risco de interven??o, tais como, baixa renda e h?bitos e aos moduladores dos fatores de risco heredit?rios: etnia, rela??o dos caninos e pad?o facial

This study investigates E-banking Operational Risk Assessment (ORA) to enable the development of a new ORA framework and methodology. The general view is that E-banking systems have modified some of the traditional banking risks, particularly Operational Risk (OR) as suggested by the Basel Committee on Banking Supervision in 2003. In addition, recent E-banking financial losses together with risk management principles and standards raise the need for an effective ORA methodology and framework in the context of E-banking. Moreover, evaluation tools and / or methods for ORA are highly subjective, are still in their infant stages, and have not yet reached a consensus. Therefore, it is essential to develop valid and reliable methods for effective ORA and evaluations. The main contribution of this thesis is to apply Fuzzy Inference System (FIS) and Tree Augmented Naïve Bayes (TAN) classifier as standard tools for identifying OR, and measuring OR exposure level. In addition, a new ORA methodology is proposed which consists of four major steps: a risk model, assessment approach, analysis approach and a risk assessment process. Further, a new ORA framework and measurement metrics are proposed with six factors: frequency of triggering event, effectiveness of avoidance barriers, frequency of undesirable operational state, effectiveness of recovery barriers before the risk outcome, approximate cost for Undesirable Operational State (UOS) occurrence, and severity of the risk outcome. The study results were reported based on surveys conducted with Nigerian senior banking officers and banking customers. The study revealed that the framework and assessment tools gave good predictions for risk learning and inference in such systems. Thus, results obtained can be considered promising and useful for both E-banking system adopters and future researchers in this area.

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