Application of Risk Metrics for Role Mining

Incorporating risk consideration in access control systems has recently become a popular research topic. Related to this is risk awareness which is needed to enable access control in an agile and dynamic way. While risk awareness is probably known for an established access control system, being aware of risk even before the access control system is defined can mean identification of users and permissions that are most likely to lead to dangerous or error-prone situations from an administration point of view. Having this information available during the role engineering phase allows data analysts and role engineers to highlight potentially risky users and permissions likely to be misused. While there has been much recent work on role mining, there has been little consideration of risk during the process. In this thesis, we propose to add risk awareness to role mining. We aggregate the various possible risk factors and categorize them into four general types, which we refer to as risk metrics, in the context of role mining. Next, we propose a framework that incorporates some specific examples of each of these risk metrics before and after role mining. We have implemented a proof-of-concept prototype, a Risk Awareness system for Role Mining (aRARM) based on this framework and applied it to two case studies: a small organizational project and a university database setting. The aRARM prototype is automatically able to detect different types of risk factors when we add different types of noise to this data. The results from the two case studies draw some correlation between the behavior of the different risk factors due to different types and amounts of noise. We also discuss the effect of the different types and amounts of noise on the different role mining algorithms implemented for this study. While the detection rating value for calculating the risk priority number has previously been calculated after role mining, we attempt to find an initial estimate of the detection rating before role mining

ETS (Efficient, Transparent, and Secured) Self-healing Service for Pervasive Computing Applications

To ensure smooth functioning of numerous handheld devices anywhere anytime, the importance of self-healing mechanism cannot be overlooked. Incorporation of efficient fault detection and recovery in device itself is the quest for long but there is no existing self-healing scheme for devices running in pervasive computing environments that can be claimed as the ultimate solution. Moreover, the highest degree of transparency, security and privacy attainability should also be maintained. ETS Self-healing service, an integral part of our developing middleware named MARKS (Middleware Adaptability for Resource discovery, Knowledge usability, and Self-healing), holds promise for offering all of those functionalities

Knowledge and public health practices during lockdown towards COVID-19 in Bangladesh

The study aimed to assess the role of having knowledge and essential hygiene practices to prevent coronavirus pandemic and to find out the relationship between people’s knowledge and good hygiene practices with socio-demographic variables during coronavirus disease 2019 (COVID-19) pandemic situation. In this study, data were collected from 248 respondents for cross-sectional study using voluntary response sampling from April, 30 2020 to May, 30 2020, during lockdown situation in Bangladesh. Descriptive statistics were done to calculate the frequencies and percentages by using Stata SE 14.2 (StataCorp). Chi-square was performed at the significance level of 5% to find the factors which were associated with knowledge about COVID-19. After knowing about COVID-19, 86.29% respondents had taken preventive measures and 71.37% respondents had agreed to stay at home. Among the respondents, 47.98% were involved in services and were positively associated with good general knowledge of preventive practices. Our present findings indicated significant relationship between good general knowledge and practice of general people towards COVID-19 outbreak in Bangladesh. The findings of the study are helpful for the researchers and the population to follow all good promotional practices for preventive measures against coronavirus

The Anthrax Outbreak

DOI: 10.3329/bsmmuj.v3i2.7052BSMMU J 2010; 3(2): 6

Drug used pattern by self-medication among the RT-PCR positive health workers in Dhaka city

Background: To date there is no effective treatment against COVID-19. Self-medication played one of the major modes of treatment among general population as well as the health workers during this pandemic. Studying the pattern of self-medication among the health care workers (HCWs) may indicate their knowledge and skills towards rational use of medicines. The aim of the study was to assess the pattern self-medication among the COVID-19 affected HCWs.Methods: This cross-sectional survey assessed the pattern of drug used by self-medication among the health workers who were RT-PCR positive in context to Bangladesh.Results: A total of 267 HCWs data were collected. Most of the HCWs were in middle age group between 31-40 years with the mean age of 32.2±5.2. Doctors (83.9%) enrolled five times more than the nurses (16.1%). Most of the HCWs (60.3%) commenced medications just after appearance of symptoms and 27.0% went for the RT-PCR testing. Only 3.7% went to health care facilities for treatment. More than sixty percent of the respondents took medication by themselves just after start the symptoms, 19 (33.7%) took advised from the specialists and attended at health facilities 2.6%. Most of the patients (42.7%) used azithromycin as antimicrobial agent. Paracetamol was the most used drug among the participants (78.65%) followed by antihistamines (67.79%). Average number of drugs used by patients 3.1% and percentage of antibiotics per patients 42.6%.Conclusions: The prescribing practice of antibiotics shows deviation from the standard recommendation. Awareness regarding essentials drug list should be needed.

Formative assessment and productive pedagogy in Finnish Classroom assessment: In the lens of curriculum materials

The motivating forces of directing this thesis are: the strong position of curriculum resources for teachers planning and practice as well as curriculum design matters for classroom instruction and pupils learning outcomes; potentiality of formative assessment in teaching-learning process to improve students experience of learning; worldwide recognition of productive pedagogy as a research tool to improve students learning; and the expected benefits through escalating the knowledge in the area of curriculum materials. Therefore, the study aimed to investigate what content of productive pedagogy is represented in Finnish curriculum materials and teacher s practices. It aimed to dig more deeply into the features of the support the curriculum materials offer to design the formative assessment in classroom practice. To do so, the study investigates the features and map the formative assessment and productive pedagogy components for classroom practices as construed in national core curriculum, Finnish teacher guides and teacher practices. The data consist of two Finnish teacher guides in mathematics for Grade vii, national core curriculum and seven teachers from seven comprehensive schools who are responsible for mathematics and science teaching. The analytical tools were developed based on OECD given six key components of formative assessment and Queensland School Reform Longitudinal Study (1998-2001) research team given productive pedagogy components. The study extended also to analyze other issues, i.e. the views of teachers in role of classroom assessment and challenges they faced. As such, the results of this study map the terrain over how formative assessment requirements are described, how components of productive pedagogy merged and how teacher practices both formative assessment and productive pedagogy in classroom assessment. The study provides insights into the strengths and weaknesses in offered for formative assessment environment and nurturing productive pedagogy. However, it was found that peer assessment is deficient in both teacher guides and teachers practices. Teachers could use the study results as insights when making decisions about how to use curriculum materials, and to possibly reconsider how to organize the enactment of the teacher guides and national curriculum in order to develop formative assessment environment and to construct pedagogy productively in their classroom. The analyses could provide authors of teacher guides with appreciated information to consider regarding organization and design

Modeling And Control Of Lane Keeping System For Autonomous Vehicle

Control of autonomous ground vehicle has been one of the most vital topic of research in recent times. Among many features, lane keeping of ground vehicle has caught the attention of the researchers for its immense need in the passenger cars to avoid accidents and congestion. In this research a mathematical model of ground vehicle is developed from the lateral dynamics. The steering angle and the road curvature acts as the control input and the disturbance input of the vehicle respectively. Then with the help of conventional control method the vehicle is controlled to keep the lane. Later, model predictive control is applied for controlling the vehicle model. For both conventional and model predictive control approaches, the stability and robustness of the closed loop control system is conducted on dry and wet road condition. For robustness analysis, parametric uncertainty is added in the vehicle model, where road-tire friction coefficient and look ahead distance are assumed as uncertain parameters. Robustness of the proportional, integral, derivative control is not satisfactory in the presence of parametric uncertainty but the model predictive controller is robust enough in the presence of uncertain road-tire friction coefficient and look ahead distance

Effect of dissolution rate and subsequent ion release on cytocompatibility properties of borophosphate glasses

Present work explores the relationship between the composition, dissolution rate, ion release and cytocompatibility of a series of borophosphate glasses. While, the base glass was selected to be 40mol%P2O5-16mol%CaO-24mol%MgO-20mol%Na2O, three B2O3 modified glass compositions were formulated by replacing Na2O with 1, 5 and 10 mol% B2O3. Ion release study was conducted using inductively coupled plasma atomic emission spectroscopy (ICP-AES). The thermal scans of the glasses as determined by differential scanning calorimetry (DSC) revealed an increment in the thermal properties with increasing B2O3 content in the glasses. On the other hand, the dissolution rate of the glasses decreased with increasing B2O3 content. To identify the effect of boron ion release on the cytocompatibility properties of the glasses, MG63 cells were cultured on the surface of the glass discs. The in vitro cell culture study suggested that glasses with 5 mol% B2O3 (P40B5) showed better cell proliferation and metabolic activity as compares to the glasses with 10 mol% (P40B10) or with no B2O3 (P40B0). The confocal laser scanning microscopy (CLSM) images of live/dead stained MG63 cells attached to the surface of the glasses also revealed that the number of dead cells attached to P40B5 glasses were significantly lower than both P40B0 and P40B10 glasses

Ubi-App: A Ubiquitous Application for Universal Access from Handheld Devices

Universal access from a handheld device (such as a PDA, cell phone) at any time or anywhere is now a reality. Ubicomp Assistant (UA) (Sharmin et al. in Proceedings of the 21st annual ACM symposium on applied computing (ACM SAC 2006), Dijon, France, pp 1013–1017, 2006) is an integral service of MARKS (Sharmin et al. in Proceedings of the third international conference on information technology: new generations (ITNG 2006), Las Vegas, Nevada, USA, pp 306–313, 2006). It is a middleware developed for handheld devices, and has been designed to accommodate different types of users (e.g., education, healthcare, marketing, or business). This customizable service employs the ubiquitous nature of current short range, low-power wireless connectivity and readily available, low-cost lightweight mobile devices. These devices can reach other neighbouring devices using a free short-range ad hoc network. To the best of the authors’ knowledge, the UA service is the only service designed for these devices. This paper presents the details of Ubi-App, a ubiquitous application for universal access from any handheld device, which uses UA as a service. The results of a usability test and performance evaluation of the prototype show that Ubi-App is useful, easy to use, easy to install, and does not degrade the performance of the device