SOLID SUPPORT ON THIOSALICYLATE BASED IONIC LIQUID FOR METAL EXTRACTION

Providing safe drinking water for human being has always been the subject of interests for many scientists. Since decades ago, serious efforts have been taken to solve the drinking water pollution issue especially those cases that involved the lethal effects on human. Cleaning water from heavy metal such as nickel, cadmium, lead and iron is always be very challenging since some conventional methods used such as solvent extraction method has harmful effects on environment. In this research the choice of having metal extraction using greener technology will be applied by using ionic liquid as the extraction agent. Octylpyridinium thiosalicylate ionic liquid are stable at high temperature will be the modified by syntheses process with silica as the absorbent material. The syntheses of ionic liquid will involve the process of quarternization, purification, drying and metathesis. The parameters that will be varied in order to get high efficiency of metal removal is the variation of silica loading. Analysis on the efficiency of this method will be evaluated through the results obtained from Atomic Absorption Spectrometer (AAS) reading

Hole Integrity Of Carbon Fiber Reinforced Epoxy Composites Using Combined Punching And Drilling Techniques

The use of the fiber reinforced polymer (FRP) has been increased in recent year in many industries, mostly in automotive, aircraft and marine structures due to strength to the weight ratio, better fatigue life, corrosion resistance and tailored-made properties. One of major advantage is that structure can be moulded easily to the net shape. However, there is still a need to joint to assemble the composite structures into the final product. This is essential when the design of the product is too complicated to be moulded into single part or the structure need a frequent inspection and replacement for maintenance. Therefore, to assemble the structures together, the use of mechanical joint in composite structures is inevitable. The capability of the mechanical joints (bolted joint, pin joints, and rivet joints) depends on the hole quality and performance since the load transmitted via fastener give rise to stress concentration around the hole-fastener boundary. Drilling is the most common technique in hole making technique of composite panel. But due to wear, quality of the produce hole is severely affected. At the same time cost will increase as the frequent regrinding is required. From previous study, punching was proposed. Wear problem is not an issue in punching, but hole quality become the major issue. This experimental study aims to investigate the quality of hole prepared via conventional drilling technique and the combined technique (punching + conventional drilling) on carbon fiber reinforced polymer (CFRP). The effect of the both hole making techniques (combined technique and conventional drilling) to the hole quality and performance were evaluated by conducting experimental based on surface roughness and bearing strength. The surface roughness measurement was performed over a sampling length of 3.6 mm along at the four quadrant points of the hole wall. A bearing test a was conducted using modified fixture. The failure modes resulting from an experiment are quantified and compared to literature. The results confirm that the use of the combined technique in hole making on CFRP is almost similar to the conventional drilling alone in terms of bearing strength and failure mode as well as surface roughness

An evaluation of cultural roles and usability attributes in learning management system

The purpose of this exploratory study was to explore the relationship between cultural dimensions and the usability attributes of a learning system management (myLMS) in Open University Malaysia

Understanding the structural properties of feasible chemically reduced graphene

The production of pristine graphene materials for industrialization, often limited by the complicated synthesis route, has introduced other graphene derivatives with a workable and facile synthesis route, especially for mass production. For the chemical exfoliation process, the synthesis involves oxidants and reducing agents to exfoliate the graphene layer from the 3D graphite and remove excess oxygen-containing functional groups yielding graphene-like materials known as reduced graphene oxide (rGO). This work feasibly produces rGO with nanoplatelet morphology through the green solution-processable method. Upon reduction, the crystallite size for the a-axis (La) is more prominent (22.50 Å) than the crystallite size for the c-axis (Lc) (11.50 Å), suggesting the nanoplatelets structure of the end product, which is also confirmed by the morphology. The integrated intensity (ID/IG) ratio and average defect density (nD) of as-prepared rGO confirmed the sp2 restoration in the graphitic structure. Overall, the Raman and X-ray diffraction (XRD) characterization parameters validate the production of rGO nanoplatelets, especially with four graphene layers per domain, suggesting that high-quality rGO are achievable and ready to be implemented for the large-scale production

A Hybrid AHP-TOPIS-Based Marine Economic Activities Evaluation Model for Marine Geospatial Data Infrastructure

Marine economic activities are related to the economics of marine resources and maritime sectors, particularly for Marine Geospatial Data Infrastructure (MGDI) and the blue economy. Malaysia has different resource-based economic activities within its maritime delineation zones (MDZs), characterized to be a multi-criteria decision-making (MCDM) problem. However, previous studies have not adequately examined these activities across the MDZs. This paper assesses Malaysia's marine economic activities in these zones through a novel and hybrid framework incorporating the Analytic Hierarchy Process (AHP) and the Techniques for Order Preference by Similarity to Ideal Solution (TOPSIS) models. AHP was used to evaluate the economic criterion of MGDI, while, the priorities obtained serve as part of the input data for the TOPSIS model that examined the trends in economic activities across the MDZs and rank them in order of preference. The results suggest that naval administration, sovereignty, and defense are highly prioritized among the five marine economic activities considered, with a value of 42%. Meanwhile, the Contiguous Zone was the highest-ranked MDZ for economic activities in Malaysian waters, with a computed  values of 27.7%. This approach provides stakeholders with an evaluation model to assess marine economic activities in different MDZs, providing a robust framework for effective evaluations of MCDM, and marine operations

Harnessing Learners' Insight of Online Courses and Learning Management System

The frequency of online courses using web-based learning has continued to increase in terms of demand and access. However the effectiveness of online courses particularly in relation to individual learners’ needs, perceptions, performance and outcomes are sometimes being questioned. To support for a successful learning system, this study will harness learners’ insight of online courses and learners’ use of learning management system (LMS). Much of this study is based on learner insights of the quality and quantity of their interactions and learning experiences using LMS and social presence in online courses. Only by understanding learners’ insights can we develop strategies or guidelines for creating a more inclusive and effective LMS and online courses. This study was conducted on 224 respondents from the Faculty of Information Technology and Multimedia Communication, Open University Malaysia. This study allows for learners’ feedback and an opportunity for the institution to improve the learning system and nurture e-learning. (Authors' abstract

Success factors affecting the healthcare professionals to utilize cloud computing services

Integrating the new technologies to improve the healthcare services can be seen as one of the research trends nowadays, as earlier studies have recommended the potential of emerging technologies in enhancing healthcare service practices by means of providing more opportunities to carry out activities essential for prevention, diagnosis, monitoring, and treatment of the disease. Involving the cloud computing services in healthcare domain can offer a way for handling and maintaining health data by making use of software applications hosted on the Internet. To ensure successful cloud computing utilization, a pre-examination on the context of usage should be applied in order to collect the real needs to guarantee getting all the possible benefits of this technology. In Iraq, the health records of public hospitals consist of various types of data which continue to increase in velocity, volume, and variety progressively. This has led to several major issues to the health sectors from two perspectives, data complexity and low IT integrity. For that reason, managing and maintaining all these health data are essential to healthcare organizations. In this paper, we collected the success factors that may influence the healthcare professionals to utilize cloud computing services for the health sector in Iraq. This is done by conducting an interview with 30 physicians and technicians from four hospitals in Iraq, then a literature survey was carried out to verify that all the gathered factors are within the circumstance of healthcare. It has been found that eight factors may affect the perspective of healthcare professionals to utilize cloud computing services. Finally, a conceptual model was developed based on the findings

A study on the capacity constraint and production output at First Solar (M) Sdn Bhd / Abdul Rashid Mohd Ghazalli...[et al.]

From operation management view, the capacity of an operation is defined as the maximum level of value-added activity that the process can achieved under normal operating conditions. More often, especially in manufacturing sector, capacity is defined as the maximum production or output rate. Despite having good capacity, the production rate / capacity are highly depending on the constraint available, which limited the company to achieve its current and future demand as well as opportunity available. In First Solar Kulim, the company is facing problem on it existing capacity. The existing production capacity is unable to manage and fulfil existing and additional demand on its solar panel. This is due to the First Solar German's factory and operation has been suspended, which had affected First Solar global production output. Increasing demand for solar panels products is another contributing factor. Without involving new investments, the problems of capacity constraints need to be addressed and resolved in order for First Solar to remain competitive in the market. In this study, the researchers have investigated on how to overcome the capacity constraints to enable First Solar Kulim to achieve its existing and future demand for its products. The researchers have focused on the process improvements at finishing area hich is the last process and become bottleneck in an existing First Solar throughput. There are four tests being conducted in order to find the best options for process improvement. All four tests have given significant results in terms of production output. However, the best option is selected based on the criteria of acceptable product quality such as panel dryness and visual specifications. This study could help to enable First Solar Kulim to manage its capacity constraints by doing a process improvement in order to achieve its maximum production output

Effect of sulfur content in the crude oil to the corrosion behavior of internal sur-face of API 5L X65 petroleum pipeline steel

This work discussed the corrosion behaviour of the internal surface of pipeline steel caused by petroleum products’ composition, particularly crude oil. Internal and external pipeline corrosion is the notable cause of pipeline failure in Malaysia’s oil and gas industry. However, internal corrosion is preferred to be concerned in this work because it involved one of the significant corrosive media in crude oil, such as sulfur content. This project aims to find the sulfur concentration in the crude oil using Fourier transform infrared spectroscopy and atomic absorption spectroscopy. The corrosion rate, corrosion current and corrosion potential of the API 5L X65 grade carbon steel pipeline in different simulated H2SO4 solution concentrations were carried out using the Tafel extrapolation technique. The samples’ corrosion properties were morphologically measured through the optical microscope, scanning electron microscope, and energy dispersive X-ray analyses. The results showed pipeline steel’s corrosion rate significantly increased with increasingH2SO4 concentrations. The corrosion products formed on the pipeline steel surfaces were mainly composed of iron sulphate, iron sulphide, and iron oxide. These findings are crucial to understanding the corrosion behaviour caused by crude oil and should be further investigated with the other influential factors such as temperature and petroleum flowing velocity

Revolusi Perindustrian 4.0 : Teknologi Masa Kini, Manfaat Masa Depan

Pada era kecerdasan buatan dan pengkomputeran awan ini, pengetahuan asas berkaitannya begitu penting kepada masyarakat umum. Buku ini memberi pendedahan asas berkaitan teknologi cetakan tiga dimensi, Internet Benda, data raya dan kenderaan tanpa pemandu. Di samping itu, topik menarik seperti pengkomputeran tersulam, realiti maya dan terimbuh, serta robotik termaju pasti memberi perspektif baharu kepada pembaca sekalian. Buku ini ditutup dengan menyingkap aplikasi 4IR dalam pelbagai bidang seperti pertanian, pendidikan dan perubatan. Fakta-fakta teknikal yang sarat dalam buku ini ditulis secara santai, namun sampai kepada pembacanya. Semoga pembaca dapat memahaminya dengan mudah. Buku ini bermanfaat bagi penyelidik, pemain industri, kakitangan kerajaan mahupun swasta, wartawan dan pihak media, pelajar dan seterusnya masyarakat awam. Semoga kita semua bersedia mendepani ledakan revolusi perindustrian 4.0