Internet Service Providers gather vast amounts of data in the form of trouble tickets created from connectivity related issues. This data is often stored and seldom used for proactive purposes. This thesis explores the feasibility of finding correlations in network support data through the use of data mining activities. Correlations such as these could be used for improving troubleshooting or staffing related activities. The approach uses the data mining methodology CRISP-DM to investigate typical data mining operations from the perspective of a Network Operation Center. The results show that correlations between the solving time and other ticket related attributes do exist and that support data could be used for the activities mentioned. The results also show that it exists a lot of room for improvement when it comes to data mining activities in network support data.

CoordenaÃÃo de AperfeiÃoamento de Pessoal de NÃvel Superior / FundaÃÃo Cearense de Apoio ao Desenvolvimento Cientifico e TecnolÃgico / O diabetes mellitus tipo 2 à uma doenÃa de importÃncia crescente na saÃde pÃblica, jà que sua incidÃncia e prevalÃncia tÃm avanÃado de forma assustadora, sendo causada por uma combinaÃÃo de fatores genÃticos e estilo de vida. Em face disso, a saÃde pÃblica indica a prevenÃÃo primÃria para identificar os fatores de risco para DM2 e traÃar estratÃgias com vistas a evitar a exposiÃÃo ao risco, retardando ou impedindo o aparecimento da doenÃa. Objetivou-se avaliar o risco para o desenvolvimento do DM2 entre adultos de Itapipoca-CE. Trata-se de pesquisa quantitativa, com delineamento transversal e observacional, realizada no perÃodo de janeiro a marÃo de 2010, com 419 usuÃrios da EstratÃgia SaÃde da FamÃlia do municÃpio de Itapipoca-CE, com idades entre 20 e 59 anos. Para a coleta de dados aplicou-se um formulÃrio no qual se registraram dados sociodemogrÃficos e clÃnicos e o Finnish Diabetes Risk Score. Os dados foram armazenados no Excel, sendo processados no Statistical Package for Science Social versÃo 18.0. O estudo foi aprovado pelo Comità de Ãtica em Pesquisa da Universidade Federal do Cearà sob protocolo 346/09. Dos 419 usuÃrios participantes, 88,1% eram do sexo feminino; a mÃdia de idade foi de 37 anos; 60,4% eram casados ou mantinham uniÃo estÃvel; 39,4% cursaram atà o ensino fundamental incompleto e 58,2% pertenciam Ãs classes econÃmicas D/E. Em relaÃÃo aos fatores de risco para DM2, 25,3% tinham idade ≥ 45 anos; 59,7% estavam com excesso de peso; 84% foram classificados em risco cardiovascular; 83,3% eram sedentÃrios; 53,7% relataram nÃo comer frutas e/ou verduras diariamente; 12,9% tomavam anti-hipertensivos; 5,3% mencionaram histÃria prÃvia de glicose alta e 47% histÃria familiar de DM2. Segundo observou-se, 5,2% da amostra foram classificados com hipertensÃo e apenas 0,7% com provÃvel diabetes. Quanto ao grau de risco para DM2, 24,6% estavam em baixo risco; 63% em risco moderado e 11,7% em alto risco. Entre os participantes com alto risco, 12,0% eram homens; 30,2% tinham idades ≥ 45 anos; 37,4 estavam com excesso de peso; 21,1% estavam em risco cardiovascular aumentado; 12,9% eram sedentÃrios; 14,7% nÃo comiam frutas/verduras diariamente; 31,5% tomavam anti-hipertensivos; 81,8% relataram histÃria de glicose alta e 23,9% histÃria familiar de DM2. Esse estudo abre portas para uma posterior pesquisa de intervenÃÃo no municÃpio, na qual os indivÃduos com alto risco para DM2 seriam acompanhados pelos profissionais de saÃde da ESF e dos NÃcleos de Apoio à SaÃde da FamÃlia, com orientaÃÃes quanto Ãs mudanÃas no estilo de vida, e com intervenÃÃes nos fatores de risco potenciais encontrados, objetivando reduzir ou retardar o aparecimento da doenÃa. / The type 2 diabetes mellitus is a disease of increasing importance in public health, since its incidence and prevalence have dauntingly advanced, and has been caused by a combination of genetic factors and lifestyle. In this view, public health indicates primary prevention to identify risk factors for T2DM and strategize in order to avoid exposure to risk by delaying or preventing the onset of the disease. The objective was to evaluate the risk for the development of T2DM among adults in Itapipoca town-CearÃ. It is a quantitative research with cross-sectional observational study conducted from January to March 2010, with 419 users of EstratÃgia SaÃde da FamÃlia (ESF) in Itapipoca town-CearÃ, the participants aged between 20 and 59 years. To collect data we applied a form in which demographic and clinical data and Finnish Diabetes Risk Score were registered. The data were stored in Excel, and processed in the Statistical Package for Social Science 18.0. The study was approved by the Ethics Committee of the Federal University of CearÃ, under protocol 346/09. Out of the 419 participating users, 88.1% were female and the average age was 37 years, 60.4% were married or had common law-marriage, 39.4% attended to part of primary school and 58.2% belonged to lower social classes. Regarding risk factors for T2DM, 25.3% were aged ≥ 45 years, 59.7% were overweight, 84% were classified as cardiovascular risk, 83.3% were sedentary, 53.7% reported not eating fruit and / or vegetables daily, 12.9% were taking anti-hypertensive, 5.3% reported a previous history of high glucose and 47% had family history of T2DM. As observed, 5.2% of the sample were classified as having hypertension, and only 0.7% with probable diabetes. As for the risk levels for T2DM, 24.6% were at low risk, 63% in moderate risk and 11.7% at high risk. Amongst participants with high risk, 12.0% were men, 30.2% were aged ≥ 45 years, 37.4% were overweight, 21.1% were at increased cardiovascular risk, 12.9% were sedentary; 14.7% did not eat fruit / vegetables daily, 31.5% took antihypertensive drugs, 81.8% reported a history of high glucose and 23.9% had family history of T2DM. This study opens doors for further intervention research in the town, in which individuals at high risk for T2DM would be accompanied by health professionals from the ESF and the NÃcleos de Apoio à SaÃde da FamÃlia. With the aim to reduce or delay the onset of the disease, the individuals would be given guidance as to changes in lifestyle and interventions on potential risk factors found.

Due to comfort, convenience, and flexibility, taxis become more and more prevalent in China, especially in large cities. According to a survey reported by Beijing Traffic Development Research Center, there were 696 million taxi person-rides in Beijing in 2011. However, many violations and road crashes that were related to taxi drivers occurred more frequently. The survey showed that there were a total of 17,242 taxi violations happened in Beijing in only one month in 2003, which accounted for 56% of all drivers' violations. Besides, taxi drivers also had a larger accident rate than other drivers, which showed that nearly 20% of taxi drivers had accidents each year. This study mainly focuses on investigating differences in driving behavior between taxi drivers and non-professional drivers. To examine the overall characteristics of taxi drivers and non-professional drivers, this study applied a hierarchical driving behavior assessment method to evaluate driving behaviors. This method is divided into three levels, including low-risk level, medium-risk level, and high-risk level. Low-risk level means the basic vehicle control. Medium-risk level refers to the vehicle dynamic decision. High-risk level represents the driver avoidance behavior when facing a potential crash. The Beijing Jiatong University (BJTU) driving simulator was applied to test different risk level scenarios which purpose is to find out the differences between taxi drivers and non-professional drivers on driving behaviors. Nearly 60 subjects, which include taxi drivers and non-professional drivers, were recruited in this experiment. Some statistical methods were applied to analyze the data and a logistic regression model was used to perform the high-risk level. The results showed that taxi drivers have more driving experience and their driving style is more conservative in the basic vehicle control level. For the car following behavior, taxi drivers have smaller following speed and larger gap compared to other drivers. For the yellow indication judgment behavior, although taxi drivers are slower than non-professional drivers when getting into the intersection, taxi drivers are more likely to run red light. For the lane changing behavior, taxi drivers' lane changing time is longer than others and lane changing average speed of taxi drivers is lower than other drivers. Another different behavior in high-risk level is that taxi drivers are more inclined to turn the steering wheel when facing a potential crash compared to non-professional drivers. However, non-professional drivers have more abrupt deceleration behaviors if they have the same situation. According to the experiment results, taxi drivers have a smaller crash rate compared to non-professional drivers. Taxi drivers spend a large amount of time on the road so that their driving experience must exceed that of non-professional drivers, which may bring them more skills. It is also speculated that because taxi drivers spend long hours on the job they probably have developed a more relaxed attitude about congestion and they are less likely to be candidates for road rage and over aggressive driving habits.

Human immunodeficiency virus (HIV) has become one of the world's most serious health and development challenges. It is important for African American female students who attend Historically Black Colleges and Universities (HBCUs), to engage in routine HIV testing and know their HIV status based on the high prevalence rate of HIV/AIDS among African American women and the risk of engaging in risky sexual behavior in a college. This qualitative study was developed to help gain a better understanding of how African American female students who attend HBCUs make the decision to engage in HIV testing and their attitudes toward HIV testing. Face-to-face individual interviews were conducted to collect data from African American female students who attend a HBCU. By using the theory of reasoned action and planned behavior (TRA/TPB), behaviors, intentions, attitudes, subjective norms and perceived behavioral control were explored by addressing questions and topics related to attitudes and decision making toward HIV testing. The women interviewed in this study had accepting and positive attitudes toward HIV testing. Perceived risk level was the leading a factor in making the decision to be tested for HIV among participating women. Understanding how these factors affect communities will help public health professionals, educators, community leaders, university personnel, policy makers, community organizations, and researchers develop the most effective strategies for the development and delivery of HIV testing messages that target African American female students who attend HBCUs.

Simplifying network security data to the point that it is readily accessible and usable by a wider audience is increasingly becoming important, as networks become larger and security conditions and threats become more dynamic and complex, requiring a broader and more varied security staff makeup. With the need for a simple metric to quantify the security level on a network, this thesis proposes: simplify a network’s security risk level into a simple metric. Methods for this simplification of an entire network’s security level are conducted on several characteristic networks. Identification of computer network port vulnerabilities from NIST’s Network Vulnerability Database (NVD) are conducted, and via utilization of NVD’s Common Vulnerability Scoring System values, composite scores are created for each computer on the network, and then collectively a composite score is computed for the entire network, which accurately represents the health of the entire network. Special concerns about small numbers of highly vulnerable computers or especially critical members of the network are confronted.

Background: The traditional neoclassical model of finance has assumed that all individuals act rationally and that they update their beliefs according to the information they have obtained to maximise their utility. This concept has been challenged by behavioural finance which has over the past decades become a new approach to better understand certain behaviours. Behavioural finance is a broad area which can be divided into different areas. One of them is investor behaviour, which will be the focus of this thesis. Research has shown that investors do not act rationally when deciding how much risk to take when considering an investment. Instead, it has been found that there are other factors that influence risk-taking in an investment, for instance gender, income, marital status and age. Purpose: The purpose of this thesis is to better understand if a selected group of demographic factors can affect the risk attitude investors in Sweden have with regard to their investments and to determine how well these factors explain the level of risk. The chosen demographic factors are gender, age, marital status and income. Method: This study is conducted using a deductive approach and employing a quantitative research method. A multinomial logistic regression was performed in the statistical program R. The data used is secondary data collected from financial counselling meetings of 111,265 clients during the period of 2018-01-03 to 2019-04-04. It is gathered from one of Sweden’s largest bank who measures customers’ risk tolerance by using a risk assessment tool that categorises risk tolerance into five levels where one is the lowest and five is the highest. Conclusion: Statistically significant results confirm that that the selected demographic factors have an effect on the risk level an investor takes. Males have higher risk tolerance than women, the older an individual is, the less risk the person wants to take, married people have higher risk tolerance than those that are not, and risk tolerance increases slightly with income.

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Damasio(1994)提出軀體標記假說（Somatic Marker Hypothesis）來解釋情緒如何影響行為決策，認為人們在決策前，與過去的情緒經驗關聯的生理反應會再現，幫助人們做出較好的決策判斷。並利用愛荷華賭博作業（Iowa Gambling Task）來模擬日常生活決策情境，並同時紀錄膚電反應(Skin conductance respons)，量測受試者決策前的預期膚電反應（Anticipatory SCR）和結果呈現後的回饋膚電反應(Feedback SCR)，加以佐證其神經生理機制。本研究將從三個方向進一步驗證其假說，分別是風險因素、生理證據和個別差異。在愛荷華賭博作業中，期望值負的牌也是高風險程度的牌，使結果無法清楚解釋是期望值或者風險程度造成的影響。而過去雖然有許多研究也使用膚電反應當做生理指標，但有許多相異的研究結果，並且較少研究利用事件關聯電位瞭解其中樞歷程。再者，過去相關研究發現個別差異的存在，但是缺乏一致的解釋。因此，本研究以修改版愛荷華賭博作業，控制期望值皆為零的狀況下，操弄風險程度，並且利用膚電反應和事件關聯電位當作周邊和和中樞的生理反應指標，探討受試者在單純風險情境，是否也會受到情緒軀體標記影響風險行為偏好，以及各項生理指標和風險行為偏好間的關聯，並瞭解不同風險偏好的受試者生理指標是否有所差異。結果發現，從行為上顯示有風險追逐和風險趨避兩組受試者，不同風險程度的牌損失回饋對受試者的歷程影響也不一樣，額葉的腦部回饋相關負波(Feedback-related Negativity，FRN)結果顯示，風險追逐的受試者對高低風險損失時的FRN沒有差異，風險趨避的受試者看到低風險損失時的FRN大於看到高風險損失時的FRN。此外，看到高風險酬賞比起低風險酬有較大回饋膚電反應的受試者，和看到高風險損失比起低風險損失有較小回饋膚電反應的受試者，接受高風險牌的比率也較高，其它生理變項對風險行為偏好沒有顯著的預測力。並且預期膚電反應並非過去研究認為單純扮演警訊或者誘因，而有更複雜的機制存在，受試者在接受非偏好的牌和拒絕偏好的牌前有較大的預期膚電反應。預期階段N170的結果顯示，受試者看到刺激之後會拒絕的N170會大於之後會接受的N170，顯示接受或拒絕兩種不同情境時受試者對刺激的處理歷程亦相異。 / Somatic Marker Hypothesis was proposed to explain the influence of emotion on decision making. To examine this hypothesis, Damasio and his colleagues designed the Iowa Gambling Task (IGT) and found that the “anticipatory skin conductance responses (SCR)”, i.e. somatic markers, was elevated before selecting from bad decks to serve as alarms and it warned participants not to select “bad deck” which was negative expected value. However, there are three unsolved problem in these IGT researches: the risk factor, inconsistent physiological evidences, and individual differences. In the original IGT, the bad decks are also more risky and that confounds the interpretations of participants’ choice behaviors and related physiological evidences. There are inconsistent evidences of how the anticipatory SCR and feedback SCR related with choice behaviors. Moreover, there are little event-related potential IGT studies. To solve these issues, the primary aim of the present study is to clarify whether decision making is influenced by risk level even when all options have the same expected value. A modified IGT with high risk deck and low risk deck was used and the expected values of two decks were all zero. Moreover, the procedure was different from original IGT. Participants saw a deck with mark first and then decided to accept or reject this deck. Thus, the role of anticipatory SCR could be clarified more clearly. In addition to SCR, ERP was also recorded for further physiological evidences. To elaborately clarify individual differences of choice behavior and physiological evidences, participants would group to risk-seeking (i.e., accepting more high risk deck and rejecting more low risk deck) and risk-aversion (i.e., accepting more low risk deck and rejecting more high risk deck) according their choice behaviors. The result revealed that the participant who accepted more high risk deck, their reward SCR was higher from high risk deck than from low risk decks, and induced lower punishment SCR from high risk deck than from low risk decks. Moreover, the anticipatory SCR was higher both before they decided to reject the liked deck and before they decided to accept the disliked deck. The results of feedback-related negativity (FRN) from ERP data in frontal region showed that the magnitude of FRN was larger under the conflict punishment (the punishment from low risk decks) condition for risk-aversion participants. The results of N170 from ERP data showed that the magnitude of N170 was larger under the reject condition. These results suggest that the SMH could be explained not only with expected value but also with risk preference. In conclusion, the interpretation of anticipatory SCR by previous study was not completed, and it reflected not merely the negative feeling or positive feeling. This strong anticipatory emotion affects people to change the routine behavior about their risk preference, and there exist individual differences of choice behavior and physiological evidences.