A PUF based Lightweight Hardware Security Architecture for IoT

With an increasing number of hand-held electronics, gadgets, and other smart devices, data is present in a large number of platforms, thereby increasing the risk of security, privacy, and safety breach than ever before. Due to the extreme lightweight nature of these devices, commonly referred to as IoT or `Internet of Things\u27, providing any kind of security is prohibitive due to high overhead associated with any traditional and mathematically robust cryptographic techniques. Therefore, researchers have searched for alternative intuitive solutions for such devices. Hardware security, unlike traditional cryptography, can provide unique device-specific security solutions with little overhead, address vulnerability in hardware and, therefore, are attractive in this domain. As Moore\u27s law is almost at its end, different emerging devices are being explored more by researchers as they present opportunities to build better application-specific devices along with their challenges compared to CMOS technology. In this work, we have proposed emerging nanotechnology-based hardware security as a security solution for resource constrained IoT domain. Specifically, we have built two hardware security primitives i.e. physical unclonable function (PUF) and true random number generator (TRNG) and used these components as part of a security protocol proposed in this work as well. Both PUF and TRNG are built from metal-oxide memristors, an emerging nanoscale device and are generally lightweight compared to their CMOS counterparts in terms of area, power, and delay. Design challenges associated with designing these hardware security primitives and with memristive devices are properly addressed. Finally, a complete security protocol is proposed where all of these different pieces come together to provide a practical, robust, and device-specific security for resource-limited IoT systems

Evaluation of FWD software and deflection basin for airport pavements

Falling Weight Deflectometer (FWD) test data are processed by backcalculation software to obtain modulus of layer materials of airport pavements. Currently, several backcalculation software are available. However it is not known which software produces accurate and consistence modulus values. In this study three backcalculation software; namely, BAKFAA, EVERCALC, and MODULUS are evaluated for consistency and accuracy. To examine accuracy, software predicted modulus values are compared to the laboratory tested modulus values of soils, aggregate, and asphalts. Consistency is examined by statistical analysis using three sets of FWD deflection data produced by three loads with magnitudes of 9, 12, and 16 kip at an identical location of an airport pavement. It is shown that EVERCALC software produces more consistent and accurate modulus values than the BAKFAA and MODULUS software. A concern with the available backcalculation software is that their analysis algorithms are based on layered elastic theory with linear materials models. In addition, they consider static loading, which is not the true representation of the dynamic loads applied in a FWD test in the field. To this end, this study performs a dynamic analysis of the FWD deflection basin using a finite element method (FEM) with the consideration of non-linear materials models. Results show that FEM predicted deflections have similar trends of the field measured deflections. However, a number of trial combinations of inputs and FEM models may be required to produce an identical match between the predicted and measured deflections. It is recommended that this approach be the subject of future studies

Shifting the Paradigm of Corporate Social Responsibility (CSR) towards Corporate Social Entrepreneurship (CSE): An Exploratory Study to Develop a Theoretical Framework

The main aim of the study is to explore and understand the potential for CSR practices to generate and confer unique benefits to a firm from their involvement in its activities, and exploring the scope to connect CSR and its accompanying benefits with the entrepreneurial practices of the firm. Following social constructionist philosophy this study was conducted to understand the construction of reality at the interface of CSR and entrepreneurship in large exemplary CSR practicing and entrepreneurial firms. Focusing on strategic CSR (SCSR) theories and opportunity based view of entrepreneurship, this study followed corporate entrepreneurship (CE) and social entrepreneurship (SE) theoretical underpinnings to establish a link between CSR and firm entrepreneurship to develop a theoretical framework for corporate social entrepreneurship (CSE) for creating economic, social and shared value. This is a qualitative exploratory study and the research site was Bangladesh. Case study method was used as the main method in this study and semi structured interviews as the main method for data for case studies. Secondary sources of information, company records, project profiles and other archival data were also used in this study. Four purposively selected case firms which are exemplary CSR and entrepreneurial firms operating in Bangladesh are selected for case study along with other external stakeholders. Two phases of fieldwork were carried out as per the research plan to collect rich and deep data. Data analysis considered 32 usable interviews of first phase of fieldwork and 9 follow-up interviews of second phase of fieldwork. During the first phase of fieldwork after initial purposive sampling, snowballing also followed to capture deep and thick data to generate rich insights. Since this study mainly followed qualitative cross case analysis, four purposively selected case firms comprised main data set which are exemplary CSR and entrepreneurial firms operating in Bangladesh. Cross case analyses were done to draw out the findings. Transcribed interview data were analyzed using Atlas.ti qualitative data analysis software. Open coding was used to analyze data following thematic coding process. Code co-occurrence analyses were used to do cross case analysis. Within the fields of CSR and entrepreneurship, this study explored the interaction between CSR and firm entrepreneurship focusing on corporate entrepreneurship and social entrepreneurship domains. Findings of the study suggest that the interaction of CSR practices with firm entrepreneurship may bring a better climate for exploring and exploiting business opportunities through promoting entrepreneurial behaviour, scope for innovation and better strategic and entrepreneurial practices for creating shared value. Moreover, this interaction along with social oriented vision, strategic management practices, internal environment and value based culture together are conducive for enacting corporate social entrepreneurship (CSE) to promote robust CSR practices and greater value creation. Due to qualitative cross case analysis involving limited number of cases and primarily dependency on the interview data, generalizability of the findings are limited to theoretical inference. Based on the empirical work, developed CSE theoretical model is the outcome of data analysis in a triangulating fashion which offers validity and reliability. The main implications of this study is that addressing social problems through exploring and exploiting opportunities in the shared value creation space, managers may create an enabling environment and pursue strategies which are conducive for socio-entrepreneurial business practices. Also, CSE theoretical framework is expected to be strategic and entrepreneurial simultaneously which can be effective in bringing competitive advantage for firms

Green Bond Issuance Frequency and Corporate Cost of Capital

This thesis examines the controversial cost-of-capital advantage of green bonds over conventional bonds in the green bond market. While anecdotal evidence suggested a cheaper cost of capital for green bonds, previous studies mostly focused on market reactions, coupon rates, and environmental scores, leaving a literature gap regarding the effect of green bond issuance on the corporate cost of capital. To address this gap, the thesis investigates the impact of frequent green bond issuance on the corporate cost of capital, comparing it to companies issuing a single green bond or only conventional bonds. Employing the difference-in-difference (DiD) method, the study analyzes changes in the cost of capital components, debt, and equity following multiple green bond issuances. A sample of 1462 green bonds issued by 787 universe public corporations between January 2015 and January 2023 is utilized, alongside a benchmark group of conventional bond issuers without green bonds for comparison. The dataset includes both bondlevel and firm-level data retrieved from the Thomson Reuters Eikon datastream. This study contributes to the literature by uniquely focusing on the relationship between green bond issuance frequency and the issuer's cost of capital, shedding light on financial implications. The findings of the study suggest that repetitive green bond issuers experience a lower cost of equity compared to first-time issuers of both green and conventional bonds. However, there is no significant evidence supporting a lower overall cost of capital for firms with frequent green bond issuance, which aligns with previous research by Flammer (2020) that find no pricing differential for corporate green bonds. This contradicts the cost of capital argument, which suggests that companies would issue green bonds to benefit from a cheaper source of financing.nhhma

Compare the out-of-sample performance of mean-variance optimization relative to equally weighted or naîve 1/N portfolio

Masteroppgave i finansiering og investering - Nord universitet 202

Seipin oligomers can interact directly with AGPAT2 and lipin 1, physically scaffolding critical regulators of adipogenesis

This work was supported by a Merit Scholarship from the Islamic Development Bank (to M.M.U.T.), The Agency for Science, Technology and Research, Singapore (A*STAR) (M.F.M.S), the Medical Research Council (MRC) [NIRG GO800203 and Research Grant MR/L002620/1 (to J.J.R.), Program GrantG09000554 (to S.O.R)], The Wellcome Trust [078986/Z/06/Z (to S.O.R.)], the MRC Centre for Obesity and Related Metabolic Disorders (MRC-CORD) [GO600717] and the NIHR Comprehensive Biomedical Research Centre [CG50826].Peer reviewedPublisher PD

Analysis of naturally occurring mutations in the human lipodystrophy protein seipin reveals multiple potential pathogenic mechanisms

Peer reviewedPublisher PD

Chemical Enhancer: A Simplistic Way to Modulate Barrier Function of the Stratum Corneum

Human skin could be a prime target to deliver drugs into the human body as it is the largest organ of human body. However, the main challenge of delivering drug into the skin is the stratum corneum (SC), the outer layer of epidermis, which performs the main barrier function of the skin. Scientists have developed several techniques to overcome the barrier properties of the skin, which include other physical and chemical techniques. The most common and convenient technique is to use special formulation additives (chemical enhancers, CEs) which either drags the drug molecule along with it or make changes in the SC structure, thereby allowing the drug molecule to penetrate in to the SC. The main focus is to deliver drugs in the certain layers of the skin (for topical delivery) or ensuring proper percutaneous absorption (for transdermal delivery). However, skin drug delivery is still very challenging as different CEs act in different ways on the skin and they have different types of interaction with different drugs. Therefore, proper understanding on the mechanism of action of CE is mandatory. In this article, the effect of several CEs on skin has been reviewed based on the published articles. The main aim is to compile the recent knowledge on skin-CE interaction in order to design a topical and transdermal formulation efficiently. A properly designed formulation would help the drug either to deposit into the target layer or to cross the barrier membrane to reach the systemic circulation

The Study of Hypoglycemic effect of microencapsulated Glimepiride In Long Evans Rats

In this study glimepiride was used as a model drug to evaluate the hypoglycemic effect of microencapsulated or mucoadhesive drug delivery system. Sodium alginate based Microbeads of Glimepiride was prepared using Glycerine monostearate (GMS) for oral sustained release by Orifice-ionic gelation method. The microbeads were evaluated for physical appearance, floating properties, In-Vitro release study and In-Vivo evaluation. The microbeads were free flowing, spherical in shape and have the good content of uniformity of drugs. The spherical microbeads of 2 mm diameter were prepared by dropping sodium alginate incorporated with Glimepiride solution into aqueous solution of calcium chloride, causing the precipitation of calcium alginate. These Microbeads released the drug for a prolonged residence time of more than 2 hours. The hypoglycemic effect of the mucoadhesive floating drug delivery system is a valuable method for the long term delivery of Glimepiride on Long Evans Rats

Role of Mothers’ Nutritional Knowledge, Nutritional Factors on The School Performance

A cross sectional study was carried out to investigate the effects of mothers’ nutritional knowledge, health and nutritional factors and socio-economic parameters on school performance among class five students of University Laboratory School, Dhaka. All of the eighty students were selected for this study. This study found there is a strong relationship between mother’s knowledge score and school performance. It was found that mothers’ knowledge score was responsible for 91.1 percent change in school performance. The mean BMI of the mothers was 20.44. We found that the school performance measured by class roll number of the students is significantly related with mothers BMI. There was an imperfect negative association between socio-economic parameters and school performance. But the relationship between the school performances with socio-economic parameters was strongly significant. This study also observed the relationship between Individual Dietary Diversity Score (IDDS) of respondent and marks achieved in class 4 final exam. It is alarming that consumption percentage were low for eggs (30) and milk and milk products (37.5), but majority of the students who consumed milk and milk products (63.3%) and eggs (66.7%) got the highest marks