Network forensics is a young member of the bigger family of digital forensics discipline. In particular, it refers to digital forensics in networked environments. It represents an important extension to the model of network security where emphasis is traditionally put on prevention and to a lesser extent on detection. It focuses on the collection, and analysis of network packets and events caused by an intruder for investigative purposes. A key challenge in network forensics is to ensure that the network itself is forensically-ready, by providing an infrastructure to collect and analyze data in real-time. In this thesis, we propose an agent-based network forensics system, which is intended to add real-time network forensics capabilities into a controlled network. We also evaluate the proposed system by deploying and studying it in a real-life environment. Another challenge in network forensics arises because of attackers ability to move around in the network, which results in creating a chain of connections; commonly known as connection chains. In this thesis, we provide an extensive review and taxonomy of connection chains. Then, we propose a novel framework to detect them. The framework adopts a black-box approach by passively monitoring inbound and outbound packets at a host, and analyzing the observed packets using association rule mining. We assess the proposed framework using public network traces, and demonstrate both its efficiency and detection capabilities. We, finally, propose a profiling-based framework to investigate connection chains that are distributed over several ip addresses. The framework utilizes a simple yet extensible hacker model that integrates information about a hacker's linguistic, operating system and time of activity. We establish the effectiveness of the proposed approach through several simulations and an evaluation with real attack data.

A sample of $ L dt = 3.67 pb{-1} of minimum bias events observed using the ATLAS detector at the Large Hadron Collider at $\s=7 TeV is analyzed for Missing Transverse Energy (MET) response in the presence of in-time pile-up. We find that the MET resolution ($\sigma_\text{X,Y}$) is consistent with a simple model of the detector response for minimum bias events, scaling with respect to the sum of the scalar energy ($\sum E_\text{T}$) as $\sigma_\text{X,Y}=A\sqrt{\sum E_\text{T} }$. This behavior is observed in the presence of in-time pile-up and does not vary with global calibration schemes. We find a bias in the mean ($\mu_\text{X,Y}$) of the MET that is linear with respect to $\sum E_\text{T}$, leading to an asymmetry in the $\phi_\text{X,Y}$ distribution of the MET. We propose an explanation for this problem in terms of a misalignment of the nominal center of the ATLAS detector with respect to its real center. We contrast the data with a Monte Carlo sample produced using PYTHIA. We find that the resolution, bias and asymmetry are all approximately reproduced in simulation. / Graduate

Children’s entry into school at appropriate ages and their successful progression through the primary grades are strong predictors of later life opportunities and successes. This retrospective study focuses on factors that can influence age appropriate school entry and grade progression with children who were eight at the time of the study and who live in a peri-urban community in Uganda. Children in this resource constrained community face risks of educational exclusion and longer term underachievement that arise from social, health and economic disadvantages, inequalities and inadequate services. The most disadvantaged children, those who live in households with life stress events such as the absence of one or more parents or the impact of diseases such as HIV and AIDS, are at risk of not enrolling in school at an appropriate age or not advancing successfully. Such risks may be mediated through family composition and family demographic variables and may be ameliorated through the presence of community programs designed for young children. This study examined the influence of family variables, home environment life stress events, and exposure to early childhood development (ECD) services on the educational transitions of young children. The study determined that children living with biological parents, and parents with higher educational levels, had more opportunities of exposure to community-based ECD programs, had higher success in enrolling in school at an age-appropriate time, and more successfully progressed through the grade levels. For the purposes of this study, data were collected from 535 children and their 535 caregivers in the peri-urban community of Kyanja in Kampala, the capital city of Uganda. The findings provide a backdrop for a discussion regarding the relationship between home environment life stress events, community ECD services for young children, and the current educational status of children aged eight years. A major focus lies on whether enrolment in ECD can help close the gap created by events in and the structure of the home environment. / Graduate

A high-resolution record of organic-walled dinoflagellate cyst production in Guaymas Basin, Gulf of California (Mexico) reveals a complex paleoceanographic history over the last ~40 ka. Guaymas Basin is an excellent location to perform high resolution studies of changes in Late Quaternary climate and paleo-productivity because it is characterized by high primary productivity, high sedimentation rates, and low oxygen bottom waters. These factors contribute to the deposition and preservation of laminated sediments throughout large portions of the core MD02-2515. In this study we document dinoflagellate cyst production at a centennial to millennial scale throughout the Late Quaternary. Based on the cyst assemblages three major dinoflagellate cyst zones, with seven subzones were established. The most dominant dinoflagellate cyst taxa found throughout the core were Brigantedinium spp. and Operculodinium centrocarpum. Dansgaard-Oeschger events 5-8 are inferred in the dinoflagellate cyst records on the basis of increases in warm taxa, such as Spiniferites pachydermus. Preceding and during the Last Glacial Maximum cysts of Polykrikos cf. kofoidii increase in abundance, responding to oceanographic changes in the Gulf of California perhaps caused by a regression in sea-level. Other intervals of interest are the Younger Dryas where cooler conditions are not recorded, and the Holocene which is characterized by the consistent presence of warm water species Stelladinium reidii, Tuberculodinidum vancampoae, Bitectatodinium spongium and an increase in Quinquecuspis concreta. Changes in cyst assemblages, concentrations and species diversity, along with geochemical data reflect major millennial scale climatic and oceanographic changes. / Graduate

An assessment of the costs and benefits of antiterrorism policies has a number of challenges. Canada’s situation is particularly complex because of its asymmetric and integrative economic and geographic relationship with the United States. Few theoretical models of international antiterrorism policy exist and none fit well this asymmetric relationship. This thesis attempts to fill this void by understanding the motives behind Canadian antiterrorism policies and the related spending, and how these are affected by the relationship with the United States. We explore a two country theoretical model with strategic interactions, focusing on relative spending. What is found is that the economics and geography of the two countries play a large role in motivating spending and can drastically alter antiterrorism spending beyond that needed solely for public safety in Canada. / Graduate / 0511 / 0501 / 0616 / kyleburak@gmail.com

De senaste åren har det skett en nedprioritering av risk- och krisföreberedande arbete på kommunal nivå, främst gällande naturkatastrofer. En av anledningarna till detta är att de kommunala medlen prioriteras mot andra saker som exempelvis skola, vård och omsorg. Syftet med uppsatsen är att undersöka lärdomar och förmåga rörande hanteringen av naturkatastrofer på olika myndighetsnivåer i Sverige. Lärdomar studeras utifrån ett verkligt exempel: skogsbranden i Västmanland sommaren 2014. Huvudfokus för uppsatsen är att studera Uppsala kommuns förmåga att hantera en eventuell framtida naturkatastrof. För att undersöka syftet används två teoretiska modeller: Framgångsfaktorer för krishantering samt DROP-modellen. Framgångsfaktorerna används sedan för att se om lärdomar har inhämtats ur skogsbrandskatastrofen. Uppsala kommuns förmåga analyseras genom DROP-modellen, som delas in i ett antal steg. Den kommunala förmågan analyseras i varje steg i modellen för att diskutera om motståndskraft mot en eventuell naturkatastrof finns. Resultatet av undersökningarna visar att lärdomar kan inhämtas från skogsbrandsstudien, men det som är avgörande för om lärdom verkligen tas är om myndigheterna själva aktivt väljer att ta åt sig av erfarenheterna. Dock är det osäkert om Uppsala kommun har förmåga att klara en eventuell naturkatastrof, då det finns prioriterings- och tolkningsproblematik i det beredskapsförebyggande arbetet.

Darbo tikslas. Išaiškinti ligoninės gydytojų ir slaugytojų požiūrį į pacientų saugos gerinimo galimybes. Uždaviniai. Ištirti gydytojų ir slaugytojų nuomonę apie sveikatos priežiūros profesionalų tobulinimo ir pacientų mokymo svarbą ir tematiką saugiai sveikatos priežiūrai užtikrinti; išaiškinti gydytojų ir slaugytojų nuomonę apie tinkamiausią nepageidaujamų įvykių registravimo sistemų pobūdį; palyginti gydytojų ir slaugytojų nuomones apie profesinio tobulinimosi ir pacientų mokymo svarbą bei tinkamiausią nepageidaujamų įvykių registravimo sistemų pobūdį. Tyrimo metodika. Gydytojų ir slaugytojų požiūrio į pacientų saugos gerinimo galimybes tyrimas atliktas „N“ ligoninėje, taikant anoniminės anketinės apklausos metodą. Tyrime dalyvavo 182 medicinos darbuotojai - 45,6 proc. gydytojų ir 54,4 proc. slaugytojų (atsako dažnis 88,3 proc.). Statistinė duomenų analizė atlikta SPSS 21 for Windows. Statistinių hipotezių tikrinimui naudotas chi kvadrato kriterijus. Rezultatai. 64,8 proc. apklaustųjų mano, jog medicinos darbuotojams tobulintis, norint pagerinti pacientų saugą, yra svarbu. Jų nuomone, profesionalus svarbiausia yra mokyti apie NĮ, jų prevenciją, komandinį SP profesionalų darbą bei SP profesionalų - pacientų bendravimą. Statistiškai reikšmingai didesnė dalis gydytojų negu slaugytojų mano, kad SP profesionalus yra labai svarbu mokyti apie NĮ, jų prevenciją bei SP profesionalų - pacientų bendravimą. 70,9 proc. apklaustųjų teigia, kad pacientus mokyti jų saugos klausimais yra... [toliau žr. visą tekstą] / Aim of the study. To find out the opinion of physicians and nurses about the possibilities to improve patient safety. Objectives. To explore the opinion of physicians and nurses about the importance and subjects of health care professionals and patients education to ensure the safety of health care; to clarify the opinion of physicians and nurses about the most appropriate type of adverse event reporting system; to compare the opinions of physicians and nurses about the importance of health care professionals and patients education and the most appropriate type of adverse event reporting system. Methods. The study of the opinion of physicians and nurses about the possibilities to improve patient safety was conducted in "N" hospital, using an anonymous questionnaire survey method. There were 182 medical staff participating in the survey – 45.6 percent of them were physicians and 54.4 percent - nurses (response rate – 88.3 percent). Statistical data analysis was performed by using SSPS 21 program for Windows. Chi-square test was used to test the statistical hypothesis. Results. 64.8 percent of respondents believe that it is important for medical staff to participate in training courses in order to improve patient safety. They state that the key subjects of medical staff training courses are adverse events, prevention, teamwork in health care and health care professionals-patients communication. A statistically significantly greater proportion of physicians than nurses believe... [to full text]

Tyrimo tikslas – nustatyti chirurgijos ir terapijos skyrių slaugytojų patiriamų stresogeninių įvykių ir profesinio perdegimo sąsajas. Tyrimo uždaviniai: 1. Nustatyti ir palyginti chirurgijos ir terapijos skyrių slaugytojų profesinį perdegimą, atsižvelgiant į sociodemografinius duomenis. 2. Nustatyti ir palyginti chirurgijos ir terapijos skyrių slaugytojų profesinį perdegimą, atsižvelgiant į darbe patiriamų stresogeninių įvykių pobūdį. 3. Nustatyti ir palyginti chirurgijos ir terapijos skyrių slaugytojų profesinį perdegimą, atsižvelgiant į asmeniniame gyvenime patiriamų stresogeninių įvykių pobūdį. Tyrimo metodika: tyrimas buvo atliktas VšĮ Kauno klinikinės ligoninės ir Respublikinės Kauno ligoninės chirurgijos ir terapijos skyriuose 2013 metų gruodžio mėn. Tyrimui naudotą anketą sudarė sociodemografinis klausimynas, stresogeninių įvykių klausimynas (sudarytas darbo autorės su bendraautorėmis M. Antanaitiene ir A. Rapulskyte), stresogeninių įvykių asmeniniame gyvenime klausimynas, PP („profesinio perdegimo“) klausimynas, (adaptuotas medicinos darbuotojams, paruoštas N. Vodopjanovos). Rezultatai: Tyrime dalyvavo 198 slaugytojos, iš kurių 92 dirba chirurginiuose skyriuose, o 106 – terapiniuose skyriuose. Chirurginių ir terapinių skyrių darbuotojų emocinio išsekimo, depersonalizacijos bei asmeninių pasiekimų nuvertinimo subskalių vidurkiai yra vienodi, tačiau skiriasi šių skyrių slaugytojų emocinio išsekimo subskalės balai. Nustatytas ryšys tarp darbo krūvio ir emocinio išsekimo... [toliau žr. visą tekstą] / The research identified its aim to determine the relations between stressogenic events and professional burnout experienced by the nurses at Surgery and Therapy departments. The following tasks were raised: 1. To ascertain and compare nurses’ professional burnout at the departments of Surgery and Therapy by socio-demographic indexes. 2. To identify and compare nurses’ professional burnout at the departments of Surgery and Therapy by the nature of stressogenic events. 3. To determine and compare nurses’ professional burnout at the departments of Surgery and Therapy by the nature of stressogenic events experienced in personal lives. Research methodology: the study was conducted in December, 2013, at the departments of Surgery and Therapy, Kaunas Clinical Hospital and Republican Hospital of Kaunas. The research used socio-demographic questionnaire and the questionnaire of stressogenic events at work (prepared by the author and coauthors – M. Antanaitienė and A. Rapulskytė), as well as the questionnaire of stressogenic events in personal life and Professional Burnout questionnaire (adapted for medical employees and prepared by N. Vodopjanova). Results: 198 nurses participated in the research. 92 of the subjects work at the Surgery departments, whereas 106 – at the Therapy departments. The means of the Surgery and Therapy employees’ burnout, depersonalization and personal achievements subscale indexes are even, but their emotional burnout subscale scores are different. The... [to full text]

国立情報学研究所で電子化したコンテンツを使用している。

Thesis (MPsy(Clinical))--University of South Australia, 2002.