Integrating groupware technology into the learning environment

This paper presents the hard lessons learned from the introduction of groupware technology within a final‐year software engineering module. The module began in 1997 and is now in its fourth year. The paper provides a detailed account of our successes and failures in each year, and describes what the authors now feel is a successful model for integrating groupware into the learning environment. The paper is important because it provides a longitudinal study of the use of groupware within a learning environment and an insight into the key success factors associated with the use of groupware. Success factors relate not only to the technology but also to social factors such as group facilitation and social protocols, to factors associated with monitoring and assessment, and to factors related to the skills development associated with being a member of a global team

INTEGRATING ISLAMIC AND MODERN KNOWLEDGE—PHILOSOPHICAL CONCEPTS AND THEIR PRACTICAL APPLICATIONS

The study of nature by itself will not lead to God no matter how deeply one delves into the world of matter. The heart of the observer must be responsive to the ‘wonders of God’ so that nature does not present itself as facts to be cast into neat mathematical formulas or just inspire awe and appreciation with no further elevation of the soul. Knowledge of the natural world reinforces evidence for the existence of the almighty Creator and strengthens the belief in meeting with Him (bi liqā’ rabbihim yūqinūn) for those who have opened their hearts to receive the eternal message contained in each speck of the universe. Doing more science will not make Muslims better morally or spiritually unless these values are actively sought and inculcated in their personal lives. Moral and spiritual training is an essential part of education and this training should be built into science education as well. Studying natural phenomena will lead to the knowledge of Allah (ma‘rifatullāh) only if they are recognized as the signs of Allah (āyātullāh).

The electrochemical behaviour of zinc-cadmium based anode materials in potassium hydroxide

A review is presented on the historical background to the development of primary cells, their performance characteristics and their fundamental electrochemistry

Laser powder bed fusion processing and heat treatment of Ni-base superalloys: microstructure and properties

Nickel-base superalloys are indispensable materials for the energy and aerospace industries. The additive manufacturing (AM) of these materials by powder bed fusion – laser beam (PBF-LB) presents a valuable opportunity to improve component performance and ease manufacturing and supply chain complexity in these industries. However, only a limited number of Ni-base superalloys are currently available for PBF-LB. This is due to several challenges encountered during PBF-LB processing, including microcracking, post-process cracking, development of an AM-specific microstructure, and lack of heat treatment optimization.The aim of this thesis study is to develop better understanding of the extent of these issues in different superalloys, their causes, and potential remedies. To understand aspects of processability, the alloy Haynes\uae 282\uae was studied to assess its feasibility for manufacture by means of PBF-LB, including susceptibility to cracking. Results showed excellent processibility of Haynes\uae 282\uae by PBF-LB, allowing to reach full-density crack-free components over the wide range of energy input, while also being resistant to post-process cracking.Conventionally manufactured superalloys – cast or wrought – are currently considered as the benchmark in terms of mechanical performance. The microstructure and mechanical performance of PBF-LB processed Haynes\uae 282\uae after standard heat treatment was evaluated and compared to its wrought counterpart from the literature. PBF-LB processed Haynes\uae 282\uae showed finer grain sizes and discontinuous grain boundary carbides compared to wrought microstructure. Despite excellent room temperature tensile properties, clear anisotropy in high temperature mechanical performance of PBF-LB processed Haynes\uae 282\uae was observed, which is proposed to be addressed by heat treatment optimization.Heat treatment is a critical post processing step for any precipitation strengthened alloy, and this is especially true for PBF-LB processed superalloys. Heat treatments developed for cast or wrought alloys may not be optimal for the same alloys in PBF-LB processed form because PBF-LB processed superalloys have a starting microstructure that is very different from equivalent cast or wrought microstructures. This aspect was studied in detail by evaluation of the as-built microstructure of Inconel 939, a high γ’-fraction superalloy. No γ’ precipitates were found in the as-built microstructure, however, η phase was found at inter-dendritic regions. This secondary phase was observed to grow upon ageing, lowering the ductility of the material. This demonstrates the importance of a solution treatment for Inconel 939, regardless of γ’ in the as-built condition. Further study also aimed to optimize the ageing heat treatment steps for PBF-LB manufactured Inconel 939. This resulted in a proposed ageing heat treatment which is shorter than the one used for conventional cast Inconel 939, which also produces improved and more isotropic tensile performance. Another aspect of heat treatment in PBF-LB processing is potential contamination of an alloy from the stress relief heat treatment carried out while a part is fused to a dissimilar building platform material. This was addressed in a study on Haynes\uae 282\uae built onto a carbon steel building platform. The study showed that no large-scale change in chemical composition occurred, suggesting that steel platforms are suitable for use with Ni-base superalloys

Impact of Speed Training and Plyometric Exercise On Triple Jump Performance Among Fewer Than 17 Boys

The present study is an experimental research which was concluded to find out the impact of speed training and plyometric exercise on Triple Jump performance among under 17 age boys athlete of International Indian School, Dammam, Saudi Arabia. To achieve this purpose training method was designed in which the subjects were divided from the group of two hundred and twenty -five triple jumpers which were chosen randomly for this study and they were divided into three equal groups of seventy-five each. The three experimental groups were Group A - Speed, Group B - Plyometric exercise and Group C – Speed Training. In which A & B were experimental group and C being control group. This research was based on pre-test, Treatment and post - test equivalent group design. Before the training program a pre- test for all the three groups was held. A Six-week training program was given to experimental group of Speed Training and Plyometric Exercise groups. The control group did not get the training but they had participated in other physical activities. After the Six-week training program the post - test was held for all the three groups. To analyze data, descriptive statistics was used. Further to check the effectiveness of each training program ANCOVA was applied with the pre-data as a covariate. Least significant difference was applied for post hoc analysis of variables where F-ratio was significant. The descriptive statistics for the gross scores of Spikers, Set-upper and Libero, which pertain to Mean, Standard Deviation, Minimum, Maximum, Range, Kurtosis, Skewness and Standard Error

Postoperative outcome of early appendectomy in patients having appendicular mass by laparoscopic surgery

Objective: To determine the frequency of postoperative outcome of early appendectomy in patients having appendicular mass by laparoscopic surgery.Methodology: It was a descriptive & case series study. Study was conducted in the department of surgery Liaquat University Hospital Jamshoro/Hyderabad, during the time period of Jan 2015 to Dec 2017. Patients were both gender and patients aged between 10-40 years having tender and palpable right iliac fossa mass on clinical examination confirmed on ultrasound abdomen as appendicular mass. Patients with mass in right iliac fossa but with associated features like fixed and immobile mass for more than 1 month, bleeding per rectum, history of weight loss, cardio respiratory diseases like recent myocardial infarction, congestive cardiac failure, chronic obstructive pulmonary disease and renal diseases like glomerulonephritis, nephrotic syndrome and renal failure etc, gynecological and obstetrical diseases in female patients were excluded from the study. The postoperative hospital stay was counted and wound infection was noted.Results: During the study period of one year, total of 73 patients with appendicular mass were included in this study.  The age range 10 to 40 years with mean age ± SD (range) was 25.75±9.2 years. Out of them 46 (63.0%) were male whereas 27(37.0 %) were females During operation we found appendicular abscess in 12(16.43%) cases followed by perforated appendix in   10(13.69%) cases, while during operations we found in adhesions in 15(20.5%) cases and difficulty in localisation of appendix 06 (8.21%) cases. The mean hospital stay + SD (range) was 4.91 +1.65 (3-9 days).  Wound infection was seen in 15(20.5 %) cases.Conclusion: Early appendectomy can be safely performed in appendix mass without any increased risk of mortality and morbidity. The outcome of early surgical management of appendicular lump showed benefits for single hospitalization, shorter hospital stay and lower treatment costs

Investigating the Impact of Visuohaptic Simulations for the Conceptual Understanding of Electric Field for Distributed Charges

The present study assessed the benefits of a multisensory intervention on the conceptual understanding of electric field for distributed charges in engineering and technology undergraduate students. A novel visuohaptic intervention was proposed, which focused on exploring the forces around the different electric field configurations for distributed charges namely point, infinitely long line and uniformly charged ring. The before and after effects of the visuohaptic intervention are compared, wherein the intervention includes instructional scaffolding. Three single-group studies were conducted to investigate the effect among three different populations: (a) Undergraduate engineering students, (b) Undergraduate technology students and (c) Undergraduate engineering technology students from a different demographic setting. The findings from the three studies suggests that the haptic modality intervention provides beneficial effects by allowing students to improve their conceptual understanding of electric field for distributed charges, although students from groups (b) and (c) showed a statistically significant increase in the conceptual understanding. The findings also indicate a positive learning perception among all the three groups