58178 research outputs found
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MSG368 - Sample Survey and Sampling Technique
Get PDFFirst Semester Examination 2023/2024 Academic Sessio
MAT251 - Introduction to Operations Research
Get PDFSecond Semester Examination 2023/2024 Academic Sessio
MSG384 – Introduction to Geometric Modelling
Get PDFSecond Semester Examination 2023/2024 Academic Sessio
Analysable Chaos-based Design Paradigms For Cryptographic Applications
Get PDFChaos-based cryptography has garnered significant attention, with many designs focusing on obscuring security through complex designs that make them difficult to analyze, improper design structures (ad-hoc designs) with inaccurate keyspace justification. These compromise the standards of well designed, simple, and secure design principles in cryptographical design protocol and do not facilitate future cryptanalytic efforts. Moreover, to date, there have not been any chaos-based cryptosystems being implemented to secure real-world communications. This study proposes simple and analyzable paradigms based on well-established cryptographic principles (SPN and Feistel) to address these issues. First, an in-depth review is conducted on the current state-of-the-art in the field of chaos-based cryptographic algorithms to identify the challenges of various design and evaluation methods that have been developed over the years. A comprehensive analysis into a largely overlooked problem in chaos-based cryptosystems is conducted, highlighting their unusually large keyspaces. Multiple examples demonstrate instances of chaos-based ciphers overestimating keyspaces and reveal practical and theoretical challenges in key generation approaches. The study highlights recommendations and alternative solutions for utilizing secret keys in chaos-based cryptography. Then, a simple chaos-based key schedule that ensures the involvement of every bit of the secret key in the generation of round keys is proposed. The proposed key schedule successfully passed both the NIST and ENT statistical test suites, indicating that highly complex designs are unnecessary to achieve desirable security properties
Zero Waste Campus A Framework And Digital Learning Module For Sustainable Environmental Practices In Higher Education Institution
Get PDFThe global rise in population and living standards has led to increased waste production, a significant issue in Malaysian universities where existing waste management methods such as recycling and reusing are inadequate. Guided by Saunders Research Onion methodology, this study examines the awareness and participation of Malaysian university communities in zero-waste initiatives focused on waste prevention. Utilizing a mixed-method approach with focus group discussions and in-depth interviews, the research identified ten key factors influencing Pro-Environmental Behaviour: personal experiences, environmental education, social technology, social responsibility, self-awareness, reinforcement contingencies, policy, leadership, community engagement, and environmental goals. These factors were synthesized into a framework that integrates an adapted Knowledge, Attitudes, Practices, Values, and Technology (KAPVT) theoretical framework with Kollmuss and Agyeman's PEB Model, Theory of Planned Behavior, and Value-Belief-Norm Theory, providing a comprehensive view of PEB. Structural Equation Modelling - Confirmatory Factor Analysis validated the relationships within this expanded framework using survey data from 393 respondents across three Malaysian universities. The findings demonstrated significant positive correlations between factors, leading to the creation of a digital Zero-Waste Campus Learning Module to promote sustainable practices. This provides a robust framework for enhancing national waste reduction strategies and advancing campus sustainability
The Use Of Assistive Technology And Its Impact On Students With Autism Spectrum Disorder In The Inclusive Classroom From Teachers’ Perspectives
Get PDFThe UAE is actively promoting the use of modern technologies, especially for individuals facing special challenges. This study explores the role of knowledge, attitudes, and challenges in shaping teachers' opinions about the impact of assistive technologies on the academic achievement, language, and behavior of students with autism spectrum disorder (ASD) in inclusive classrooms. The study aimed to determine the categories of students with autism spectrum disorder that benefit most from high-tech assistive technologies, the challenges facing school teachers when they use assistive technologies within the inclusive classroom, and to explore teachers’ knowledge about autism spectrum disorder and their attitudes toward integrating them into inclusive classrooms. The study methodology was exploratory and descriptive, and 275 teachers and 11 educational coordinators participated in the study. Quantitative data through questionnaires and qualitative data through interviews were used. The results of the study showed that first-level students on the autism spectrum benefit most from high-tech assistive technology. The most important challenges facing teachers were presented, and solutions were proposed. The study also explored teachers' knowledge about autism, their attitudes toward its inclusion, and the impact of these variables on their opinions about the impact of high-tech assistive technologies on students with autism spectrum disorder
In Vitro And In Vivo Effects Of Bisphenol A On Cell Growth, Lipid Accumulation And Inflammation In Liver Cell Line, Rat Adipose And Colorectal Tissues
Get PDFBisphenol A (BPA) is an exogenous endocrine disruptor that mimics hormones closely associated with health complications, such as cancer progression. BPA is also linked to an increase in the prevalence of obesity and obesity-related diseases due to its obesogenic action. The present study aimed to evaluate the effects of BPA on human liver cells and animal tissues. The BPA-treated THLE-2 cell viability was first evaluated using an MTT assay. Cytoplasmic lipid accumulation was then examined in the BPA-treated THLE-2 cells using Oil Red O staining. The expression of various adipogenesis genes in lipid metabolism, including clusterin, PPARs, CYPs, UCP1, and BRS3 in BPA-treated THLE‑2 cells, was investigated using real-time PCR. Subsequently, flow cytometry measured the DNA synthesis in BPA-treated THLE-2 cells was performed using BrdU/PI staining. The pro-inflammatory proteins IL6 and CCL2 in the conditioned media and cytoplasmic proteins of the BPA-treated THLE-2 cells were examined by ELISA. After that, various adipogenesis genes’ expression in lipid metabolism, including clusterin, PPARs, CYPs, UCP1 and BRS3, in adipose and colorectal tissues of the rats fed a diet (normal or high fat) supplemented with and without BPA was investigated using real-time PCR
Development Of Novel And Environmentally Friendly Bio- Active Dermal Drug Delivery Wound Patch For Wound Healing
Get PDFHaving a wound-healing dermal patch or medicated dressings that work well in wound healing and doesn't harm the environment is crucial. The commercially available synthetic dermal patches, plasters, and wound dressings in the market today are non- biodegradable, posing significant environmental issues. As a result, it is a great idea to reuse agro-waste to make a biodegradable dermal wound patch and, eventually, reduce environmental problems. Elaeis guineensis plant was reported with good wound healing activity in the literature and is commonly left as agro-waste at plantation areas. Therefore, this study was conducted to develop an environmentally friendly bio-active dermal drug-delivery wound patch containing E. guineensis for wound healing. The E. guineensis leaf was extracted using methanol by maceration extraction techniques, which yielded a dark brown paste-like crude extract. Subsequently, E. guineensis leaf extract was blended with polyvinyl alcohol (PVA) to develop a biodegradable dermal wound patch. Several physicochemical properties were evaluated and reported, such as appearance, average weight, thickness, moisture content, viscosity, and pH. The developed dermal wound patch had an average thickness of 0.020 mm and a weight of
3.87 mg with 17.61% of moisture content. The pH of the prepared dermal wound patch solution was 6.97, with a viscosity value of 2.56 cp. These results showed that the developed dermal wound patch is an appropriate and safe candidate to be utilized as a wound-healing agent
Heat Responsive Solar Shading In Double Skin Façade For Tropical Climates
Get PDFDouble skin façade (DSF) has emerged as a pivotal strategy for enhancing thermal performance and energy efficiency in office buildings, particularly in tropical climates. However, the full aptitudes of DSF have yet to be realized, and energy savings may not be substantial. This study investigates the potential of DSF for building thermal enhancement and energy saving, incorporating heat-responsive solar shading using thermo-bimetal louvers in the thermal cavity of DSF in Köppen-classified tropical climates. The research adopts calculation and computational simulation, EnergyPlus software. Findings indicate that both single skin façade (SSF) and DSF perform differently in respective tropical climate categories, influencing the thermal and energy performance of DSF accordingly. However, the DSF of each tropical climate group has the potential to enhance thermal performance in buildings with slightly varying annual energy efficiency rates. The study also reveals that the shading device significantly impacted the thermal and energy performance of DSF. Furthermore, thermo-bimetal louvers within the DSF cavity not only reduce the need for artificial light in DSF but also improve its thermal performance and energy efficiency. Overall, a well-designed DSF with the integration of heat-responsive solar shading has the capacity to enhance thermal behavior and energy efficiency in terms of both cooling and lighting in office buildings in tropical climates