Overview of the sensitivity of Ge- and Al-doped silicon dioxide optical fibres to ionizing radiation

This paper reviews the thermoluminescence sensitivity of Ge- and Al- doped SiO2 optical fibre subjected to various ionizing radiations. It is found that the Ge- doped SiO2 optical fiber has the thermoluminescence response superior to Al-doped SiO2 optical fibre at certain energy and dose range in alpha, beta, photon and electron irradiation. High thermoluminescence intensity per unit dose goes to photon and electron irradiation than alpha and beta irradiation of lower energy. This probably due to the linear energy transfer that influence the dose deposition in the material as incident ionizing radiation striking the surface of Ge- and Al- doped SiO2 optical fibre. However, both doped SiO2 optical fibres show good linearity at studied dose range. It has been proven by researchers providing great potential as a dose absorbed measuring devices especially in radiotherapy energy and dose rang

Study Of The Clinker Characteristics And Grindability During Cement Production.

The quality of cement product is dependent on a number of factors such as the quality of the raw material, the chemical changes during burning and cooling stages and the fineness of the grinding. Mineralogical and chemical studies on clinker will provide information about clinker characteristics and about conditions occurring at various stages of the manufacturing process

Exploring Islamic retailer store attributes from consumers perspectives: an empirical investigation

Retailers’ interest in using various combinations of store attributes to form an Islamic retail mix and project their image as an Islamic store is significantly increasing. This is due to the fact that scholars and practitioners are aware of the increasing purchasing power and significant size of the Muslim consumer segment. A review of the literature reveals that most studies conceptually and theoretically examined the principles and elements that constitute an Islamic marketing mix or retail mix. The purpose of this study is to empirically examine the stores’ attributes and how they reflect an Islamic retailer from the perspective of Muslim consumers. Data were collected through a self-administered questionnaire consisting of 300 consumers from shopping malls in Kuala Lumpur, Malaysia. Factor analysis indicated various store attributes correlate to reveal four dimensions of an Islamic retailer which are Trustworthy Pricing, Conforming Store Atmosphere, Trustworthy Product and Ethical Promotion

Changes in the structure of talc by continuous jet milling in relation to imposed specific kinetic energy

Ultra fine talc is used in many industries such as paper, paints, polymers, cosmetics and pharmaceutical. Emerging demand with stringent specification from these industries has marked jet mill as one of the essential grinding mill to produce ultra fine talc. Ultra fine grinding testwork of talc was carried out in opposed fluidized bed jet mill by varying the feed rate, classifier rotational speed and grinding pressure at three levels. In this jet mill, grinding and classification took place simultaneously. The ground products were characterized in terms of particle size distribution and mechanochemical effect via X-ray diffraction. The ground product exhibited poly-modal distribution and the minimum size obtained was 4.28 µm at 4 kg/h, 13000 rpm and 4 bar. Besides size reduction in micron range, mechanochemical effect was exhibited by the product ground in jet mill as jet mill is classified as high-energy mill. Reduction in peak intensity and peak base broadening was observed which indicates fine grinding process in jet mill induced mechanochemical effect. Furthermore preferential distortion of (00l) planes was observed as well. The degree of crystallinity of ground sample, which ranged from 26.5% to 85.3% reduces as the specific kinetic energy increase and its reduction gradient varies according to the classifier rotational speed. The crystallite size and lattice strain of talc ranged from 147.69 nm to 353.72 nm and 0.08 to 0.2 respectively

Development Of Nanocrysta Lite Cati03 Via High Intensity Grinding Using Value Added Local Raw Materials.

Mechanochemical synthesis of calcium titanate, CaTi03 was carried out in planetary mill by varying the milling time and mill rotational speed at three levels. CaC03 and Ti02 (anatase) was used as starting materials

Nutrient content in rice husk ash of some malaysian rice varieties

Analysis performed on more than 60 samples of 10 different paddy varieties showed 21.33% of the rough rice comprised rice husk, while 13% of the husk constituted rice husk ash. The nutrient content of rice husk ash was 80.26% silica, 0.38% phosphorus, 1.28% potassium, 0.21% magnesium and 0.56% calcium. Statistically, nutrient composition is significantly influenced by varietal differences. As a potential material for fertilizer use, the estimates of total nutrient supplementation available from rice husk ash per annum are discussed

Critical review of dark tourism: tourists’ perceptions and behaviour

There is a growing interest in dark tourism as evident in the increased number of publications discussing dark tourism, as well as the number of dark destinations and tourists visiting dark destinations all over the world. Past literature has concentrated on the designation and theoretical aspects of dark tourism. Emphasis was given on the scope of dark tourism, site typology, managerial aspects and issues in developing dark destinations. Thus, less is known on the travel behaviour to these places. In addition, the early studies on tourists’ behaviour to the dark destination are majorly speculated. Among the most frequently cited factors influencing travel behaviour are tourists’ motivation and experience, emotions, and perceptions towards dark tourism. Therefore, this paper will critically review the definitions of dark tourism, tourist motivation to visit dark destinations and other travel behaviours on dark tourism

Kuang Ming Packaging Industries Sdn. Bhd. (KMPI)

This case focused on Kuang Ming Packaging Industries Sdn. Bhd (KMPI) a company that produced and provided packaging and labeling materials which was incorporated in 1992. KMPI served domestic and international business buyers with a steady profit and sales. However an urgent request made by one of its main and longtime buyers for a reassessment of their contract had surfaced many weaknesses of the company. If KMPI does not respond to this problem and symptoms, they would risk losing a RM15 million contract from their customers and more importantly in the long run they would risk losing the steady profits and sales. This case requires students to critically analyze and apply the relevant marketing concept and theories in order to help resolve KMPI problem and improve their business operations

Experimental investigation on the effect of natural tropical weather on interfacial bonding performance of CFRP-concrete bonding system

The existing reinforced concrete structures may require rehabilitation and strengthening to overcome deficiencies due to defect and environmental deterioration. Fibre Reinforced Polymer (FRP)-concrete bonding systems can provide solution for the deficiencies, but the durability of the bonded joint needs to be investigated for reliable structural performance. In this research the interfacial bonding behaviour of CFRP-concrete system under tropical climate exposure is main interest. A 300 mm concrete prism was bonded with CFRP plate on its two sides and exposed for 3, 6, and 9 months to laboratory environment, continuous natural weather, and wet-dry exposure in 3.5% saltwater solution at room and 40 °C temperature. The prisms were subjected to tension and compression load under bonding test to measure the strain and determine stress distribution and shear stress transfer behaviour. The results of the bonding test showed that load transfer was fairly linear and uniform at lower load level and changed to non-linear and non- uniform at higher load level. The force transfers causes the shear stress distribution being shifted along the bonded length. The combination of climate effects may have provided better curing of the bonded joints, but longer duration of exposure may be required to weaken the bond strength. Nevertheless, CFRP-concrete bonding system was only minimally affected under the tropical climate and salt solution

Assessing the Effect of Digital Social Media towards Face to Face Communication during Pandemic COVID-19 in Higher Educational Institutions

This paper will assess the effect of social media on face-to-face (F2F) communication among students in a higher education institution. Previous scholars found that social media is a platform to connect people, especially in the current pandemic COVID-19. However, another study has shown the negative effect of social media among university students because it hampers students' real-life experiences. A literature survey has been selected to explore the effect of social media on F2F communication among students in a higher education institution. This paper also highlights the significant role of social media in higher education institutions during the pandemic of Covid19. Keywords: F2F communication, social media, Social Networking Sites (SNS), technology eISSN: 2398-4287 © 2022. The Authors. Published for AMER ABRA cE-Bs by E-International Publishing House, Ltd., UK. This is an open-access article under the CC  BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). Peer-review under the responsibility of AMER (Association of Malaysian Environment-Behavior Researchers), ABRA (Association of Behavioral Researchers on Asians), and cE-Bs (Centre for Environment-Behavior Studies), Faculty of Architecture, Planning & Surveying, Universiti Teknologi MARA, Malaysia