Stack drilling of CFRPT/TI using coated and uncoated tools.

The aerospace industry is increasingly utilising composite-metal stacks due to their superior mechanical properties and variable physical functions. Energy saving and increased strength/weight ratio are the two main factors why manufacturers are replacing separate composites and metal alloys with the hybrid stacks. These stacks are drilled and joined together with mechanical fasteners such as rivets. Single-shot drilling is a relatively new method and allows for time and cost reduction. But, because of the disparate nature of materials, drilling them at the same time poses great manufacturing challenges. Tool wear, increased temperature and poor machining quality are some of the issues encountered. This study investigated the performance of tools coated with diamond-like carbon (DLC) and boron-aluminium-magnesium (BAM) coatings which were deposited using physical vapour deposition (PVD) method. Drilling experiments were carried out on CFRP/Ti stacks and tool wear and hole quality were assessed. Tool wear results showed that DLC 1 tool had the best performance, showing the least wear. For BAM coatings, higher thickness caused the tools to fail earlier than DLC and BAM 1 tools. Uncoated tool failed after 25 holes. Overall coated tools DLC 1 and BAM 1 showed best performance.PhD in Manufacturin

PERFORMANCE EVALUATION OF SINGLE-HOP PERIODIC SAFETY BEACONING FOR VEHICLE-TO-VEHICLE COMMUNICATION IN VANET

Saving human lives on road has become the prime objective of Vehicular Ad hoc Network (VANET). In order to achieve safety, vehicles maintain neighborhood awareness with the help of safety messages. Providing an efficient safety messaging mechanism is a challenging task in VANET, due to particular characteristics of VANET, i.e. high mobility, limited channel bandwidth, very short communication duration, and highly dynamic topology. In most of the safety messaging schemes proposed so far, Periodic Safety Beacons (PSBs) are generally considered dispensable in comparison with event-driven messages. However in reality, vehicle-to-vehicle (V2V) PSBs are used to collect critical information required by all the safety messaging schemes and cannot be dispensed. Thus, ensuring optimum QoS for V2V single-hop PSBs is essential for achieving acceptable level of safety. However, thorough performance evaluation of V2V single-hop PSBs is yet to be carried out. This research comprehensively investigates V2V single-hop periodic safety beaconing in the light of tunable parameters i.e. Beacon Generation Interval (BGI),Safety Beacon Size (SBS), and Communication Range (CR) that govern their behavior. Results from exhaustive simulations show that adjusting tunable parameters solely or combined does not fully satisfy the strict QoS criterion required for safety applications. Overall, an acceptable level of end-to-end delay can be achieved by dynamically adjusting tunable parameters with BGI > IOOms, but lower BGI is not suitable with larger SBS. In dense traffic conditions strict PDR criterion of 99% is never achieved beyond lOOm target CR. An exclusive comparison between tunable parameters shows that solely adjusting BGI can attain relatively higher PDR than other tunable parameters while SBS remains the least effective parameter. It is also validated that dynamic adjustment of CR and BGI is necessary for optimal output in terms of PDR. Furthermore, optimal combinations of tunable parameters for different highway service levels with respect to safety application requirements are also presented

PERFORMANCE EVALUATION OF SINGLE-HOP PERIODIC SAFETY BEACONING FOR VEHICLE-TO-VEHICLE COMMUNICATION IN V ANET

Saving human lives on road has become the prime objective of Vehicular Ad hoc Network (VANET). In order to achieve safety, vehicles maintain neighborhood awareness with the help of safety messages. Providing an efficient safety messaging mechanism is a challenging task in V ANET, due to particular characteristics of VANET, i.e. high mobility, limited channel bandwidth, very short communication duration, and highly dynamic topology. In most of the safety messaging schemes proposed so far, Periodic Safety Beacons (PSBs) are generally considered dispensable in comparison with event-driven messages. However in reality, vehicle-to-vehicle (V2V) PSBs are used to collect critical information required by all the safety messaging schemes and cannot be dispensed. Thus, ensuring optimum QoS for V2V single-hop PSBs is essential for achieving acceptable level of safety. However, thorough performance evaluation ofV2V single-hop PSBs is yet to be carried out. This research comprehensively investigates V2V single-hop periodic safety beaconing in the light of tunable parameters i.e. Beacon Generation Interval (BGI), Safety Beacon Size (SBS), and Communication Range (CR) that govern their behavior. Results from exhaustive simulations show that adjusting tunable parameters solely or combined does not fully satisfY the strict QoS criterion required for safety applications. Overall, an acceptable level of end-to-end delay can be achieved by dynamically adjusting tunable parameters with BGI > 1 OOms, but lower BGI is not suitable with larger SBS. In dense traffic conditions strict PDR criterion of 99% is never achieved beyond lOOm target CR. An exclusive comparison between tunable parameters shows that solely adjusting BGI can attain relatively higher PDR than other tunable parameters while SBS remains the least effective parameter. It is also validated that dynamic adjustment of CR and BGI is necessary for optimal output in terms of PDR. Furthermore, optimal combinations of tunable parameters for different highway service levels with respect to safety application requirements are also presented

An area-optimized N-bit multiplication technique using N/2-bit multiplication algorithm

A unique design for an optimized N-bit multiplier is proposed and implemented which utilizes a modified divide-and-conquer technique. The conventional technique requires four N/2-bit multipliers to perform N-bit multiplication, whereas the proposed design uses only one multiplier module in hardware to perform the functionality of four modules. It uses Dadda algorithm in its multiplier module. It has been implemented using Verilog HDL, and a good accuracy of results was observed in simulations which effectively verify its functionality. Design was also synthesized on various FPGAs including Spartan 3E, Virtex-5 and Virtex-7. Performance summary, after place and route, showed that the proposed approach significantly reduces hardware utilization. Furthermore, the proposed design is almost 75% more efficient in terms of resources utilization and operating frequency as compared to the conventional design

Lamento antecipado e norma moral na intenção dos consumidores de selecionar restaurantes de trabalho infantil: aumentando a teoria do comportamento planejado

Child labor is very severe social obstacle of the world of under develop nations like Pakistan. Still most of the young children are working in different sectors for the livelihood of their homes. This study explore the anticipated regret and moral norm in consumers’ intention to select child labor restaurants with the uses of augmenting the theory of planned behavior. Present study carried out in the five districts of south Punjab, Pakistan. There are three hundred questionnaires is filled from the owners of the restaurants from the selected regions. SPSS is used for the analysis of the data and multiple regression is used for testing the hypothesis. The results showed that theory of planned behavior constructs are significantly influence the intention of the child. Many owners took child as a labor because its cheap. While augmenting version of the planned behavior theory also good predictor of the child labor intentions. Government and NGOs take some actions to eliminate the child labor and sent into the schools.El trabajo infantil es un obstáculo social muy severo en el mundo de las naciones subdesarrolladas como Pakistán. Aún así, la mayoría de los niños pequeños están trabajando en diferentes sectores para el sustento de sus hogares. Este estudio explora el arrepentimiento anticipado y la norma moral en la intención de los consumidores de seleccionar restaurantes de trabajo infantil con el fin de aumentar la teoría del comportamiento planificado. Estudio actual realizado en los cinco distritos del sur de Punjab, Pakistán. Hay trescientos cuestionarios llenados por los propietarios de los restaurantes de las regiones seleccionadas. SPSS se utiliza para el análisis de los datos y la regresión múltiple se utiliza para probar la hipótesis. Los resultados mostraron que la teoría de los comportamientos planificados influye significativamente en la intención del niño. Muchos dueños tomaron al niño como mano de obra porque es barato. Si bien la versión aumentada de la teoría de la conducta planificada también es un buen predictor de las intenciones del trabajo infantil. El gobierno y las ONG toman algunas medidas para eliminar el trabajo infantil y las envían a las escuelas.O trabalho infantil é um obstáculo social muito grave do mundo dos países em desenvolvimento, como o Paquistão. Ainda a maioria das crianças jovens estão trabalhando em diferentes setores para o sustento de suas casas. Este estudo explora o lamento antecipado e a norma moral na intenção dos consumidores de selecionar restaurantes de trabalho infantil com o objetivo de aumentar a teoria do comportamento planejado. Presente estudo realizado nos cinco distritos do sul de Punjab, Paquistão. Existem trezentos questionários preenchidos pelos proprietários dos restaurantes das regiões selecionadas. O SPSS é usado para a análise dos dados e a regressão múltipla é usada para testar a hipótese. Os resultados mostraram que a teoria dos construtos de comportamento planejados influencia significativamente a intenção da criança. Muitos proprietários levaram criança como um trabalho de parto porque é barato. Enquanto aumenta a versão da teoria do comportamento planejado também bom preditor das intenções de trabalho infantil. O governo e as ONGs tomam algumas medidas para eliminar o trabalho infantil e enviá-las para as escolas

Usage and Perception of E-Resources by Undergraduate Students: A Case Study of Government Degree College Baramulla- J&K

We have witnessed a drastic change in the organization and operations of Library and Information Centres from last three decades or so. From storehouses of books to Information Centres, from preserving philosophy to access orientation, printed materials to digital information, manual system of operations to automatic service delivery systems and from in-house services to advanced consortia based remote access to flood of information resources, libraries as service centres have traversed a long journey with revolutionary and evolutionary ramifications. Modern-day libraries are flooded with lots of information sources both in print as well as in digital format. A major chunk of information resource in today’s libraries is in electronic and digital form which have tremendous advantages over their print counterparts. This study is an attempt to study the usage, preference, and perception of undergraduate students at the college level. Survey method of data collection has been employed with a sample size of 350 students across the 5 streams of study in the institution. The major findings of the study reveal that students are more inclined towards E-Resources in comparison to print sources. College library needs to market its services particularly E-Services among the students as the large percentage of users are not fully aware of the E-Resources and services available in their library

Synthesis and Characterization of Naproxen Intercalated Zinc Oxide Stacked Nanosheets for Enhanced Hepatoprotective Potential

Liver diseases pose a significant global health burden, with limited therapeutic options for chronic cases. Zinc oxide (ZnO) nanomaterials have emerged as promising candidates for hepatoprotection due to their antioxidant, anti-inflammatory, and regenerative properties. However, their potential remains hampered by insufficient drug loading and controlled release. The current study explores the intercalation of Naproxen (Nx), a potent anti-inflammatory and analgesic drug, within ZnO stacked nanosheets (SNSs) to address these limitations. Herein, an easy and solution-based synthesis of novel Nx intercalated ZnO SNSs was established. The obtained Nx intercalated ZnO SNSs were encapsulated with poly(vinyl acetate) (PVA) to make them biocompatible. The synthesized biocomposite was characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier transform infrared spectroscopy (FTIR), which confirm the successful synthesis and intercalation of Nx within the ZnO SNSs. The obtained outcomes showed that the configuration of ZnO nanosheets was altered when Nx was introduced, resulting in a more organized stacking pattern. An in vivo investigation of mice liver cells unveiled that the Nx intercalated ZnO SNss had increased hepatoprotective properties. The study’s results provide valuable insights into using Nx intercalated ZnO SNss for targeted drug delivery and improved treatment effectiveness, particularly for liver-related illnesses

Gender Stereotypes and Teachers Perceptions (The Case of Pakistan)

The purpose of this study is to investigate the attitude and perception of university teachers towards students’ gender role. A self-administrated questionnaire was used to engender the responses from 155 university teachers of private  and public sector  universities in Pakistan and responses were analyzed according to gender and education in order to find out that why they show biasness towards male and female students and how gender-stereotype is played out by teachers in the classroom. In this paper we will also analyze that how these demographic independent variables effects the belief and perception of teachers regarding students’ gender role. Results indicate that teachers have different behavior towards male and female students and it is due to teacher’s perceptions and attitude toward their students’ gender role. Result shows that discrimination by teachers towards the students’ gender role in public and private sector universities as well as age, qualification, designation, language, marital status and ownership have significant relationship with students’ gender biasness. This relationship has not been investigated in Pakistan before so our study is with the purpose to empirically get an insight to Pakistan. As teacher gender role stereotyping is the most considerable factor in educational differences of gender but there are few studies focusing on it. It is agreed that teachers have the greatest influence on educational stereotypes so; our study is part of the minority effort to deal with this problem. Keywords: Teachers ‘Demographics, Gender Stereotypes, Teachers' Perceptions and Belief, Students' Gender Roles; Pakistan

Human amniotic fluid contaminants alter thyroid hormone signalling and early brain development in Xenopus embryos.

Thyroid hormones are essential for normal brain development in vertebrates. In humans, abnormal maternal thyroid hormone levels during early pregnancy are associated with decreased offspring IQ and modified brain structure. As numerous environmental chemicals disrupt thyroid hormone signalling, we questioned whether exposure to ubiquitous chemicals affects thyroid hormone responses during early neurogenesis. We established a mixture of 15 common chemicals at concentrations reported in human amniotic fluid. An in vivo larval reporter (GFP) assay served to determine integrated thyroid hormone transcriptional responses. Dose-dependent effects of short-term (72 h) exposure to single chemicals and the mixture were found. qPCR on dissected brains showed significant changes in thyroid hormone-related genes including receptors, deiodinases and neural differentiation markers. Further, exposure to mixture also modified neural proliferation as well as neuron and oligodendrocyte size. Finally, exposed tadpoles showed behavioural responses with dose-dependent reductions in mobility. In conclusion, exposure to a mixture of ubiquitous chemicals at concentrations found in human amniotic fluid affect thyroid hormone-dependent transcription, gene expression, brain development and behaviour in early embryogenesis. As thyroid hormone signalling is strongly conserved across vertebrates the results suggest that ubiquitous chemical mixtures could be exerting adverse effects on foetal human brain development