Effect of Lubricant Content to the Properties of Fe-based Components Formed at above Ambient Temperature

AbstractThis paper presents the outcomes of an experimental investigation on the effect of lubricant content to the mechanical properties and microstructure of components formed at above ambient temperature. A lab-scale uni-axial die compaction rig was designed and fabricated which enabled the powder forming at elevated temperature. Iron powder ASC 100.29 was mechanically mixed with different quantity of lubricant, i.e., zinc stearate for 10, 30, and 60minutes, respectively. Green compacts were generated by forming the prepared powder mass at 180°C through simultaneous upward and downward axial loading. The defect-free green compacts were subsequently sintered in argon gas fired furnace and characterized for their physical and mechanical properties as well as their microstructures were evaluated. The results revealed that the characteristics of final products were affected by lubricant content and mixing time. From this study, the suitable zinc stearate content and mixing time were identified for the production of high quality components through warm forming route

Kinetic study of phytochemical extraction and antioxidant potential of hibiscus cannabinus L.

Kenaf Hibiscus cannabinus L.) is a valuable plant originating from Africa. It has multifunction among the old folk community and recently, it is employed in biochemical for functional food and structural engineering application in biocomposite materials. In Malaysia, kenaf plant is used as a material to the process of obtaining fiber for structural application. It also has excellent medicinal value for treating diseases through biochemical processing, but its profiling is still limited in the literature. This study aimed to (i) screen the secondary metabolite compound, and (ii) investigate the potential of kenaf leaf as a new functional food. The qualitative and quantitative phytochemical screenings of leaf extracts, as per the standard protocols were performed to identify the feasibility of kenaf leaf for use as a functional food. Bioactive compounds were found in both young and old kenaf leaves. In quantitative results, TPC, flavonoid and tannin, estimation of vitamin C, and DPPH test were carried out. This kinetic study showed that old leaf contained higher bioactive compounds than the young one. Kenaf leaf has the potential to be used as promising prototypes sources of functional food, and it is rich in antioxidants and bioactive compounds which are beneficial to human health

Ferrographic Analysis of Wear Particles of Various Machinery Systems of a Commercial Marine Ship

AbstractThe objective of this paper is to present the ferrographic analysis of wear particles contained in used lubricant oil samples that collected from the engines, generators and gearboxes of a commercial marine ship. Flash point, viscosity measurement, ferrography analysis and energy dispersive X-ray analysis (EDX) have been employed to extract the relevant information about the physical aspects of used oil and the wear condition of the parts from generator, gearbox and main engine. The study showed that the application of wear particle analysis and ferrography in particular is an effective means to identify and respond to maintenance needs of marine ships machineries

Pengaruh Financial Technology Terhadap Profitabilitas Perbankan Di Indonesia(Studi Komparasi Bank BUMN Periode 2017-2019)

The rapid development of science and technology gave birth to various innovations. One of the innovations currently emerging is innovation in financial services. This innovation combines a financial service system with the latest technology. As a bank that is controlled by the government, state-owned banks are flapping their wings by cooperating with this innovation as a form of their efforts to increase company profitability. This study aims to analyze the effect of financial technology on the profitability of state-owned banks. This research is a descriptive analysis research type with a quantitative approach to a comparative study of profitability ratios with samples taken from state-owned banks for the 2017-2019 period that have collaborated with fintech start-ups, namely Bank Rakyat Indonesia (BRI), Bank Mandiri, Bank Tabungan Negara (BTN), and Bank Negara Indonesia (BNI). The Paired T-Test and Wilcoxon Signed Rank Test methods are used to get a comparison before and after collaborating with fintech start-ups. The results of this study indicate that for the most part there is no significant difference in the profitability ratios of ROA, ROE, NIM and BOPO after collaborating with fintech start-ups

Architecture and network-on-chip implementation of a new hierarchical interconnection network

A Midimew-connected Mesh Network (MMN) is a minimal distance mesh with wrap-around links network of multiple basic modules (BMs), in which the BMs are 2D-mesh networks that are hierarchically interconnected for higher-level networks. In this paper, we present the architecture of the MMN, addressing of node, routing of message, and evaluate the static network performance of MMN, TESH, mesh and torus networks. In addition, we propose the network-on-chip (NoC) implementation of MMN. With innovative combination of diagonal and hierarchical structure, the MMN possesses several attractive features, including constant degree, small diameter, low cost, small average distance, moderate bisection width and high fault tolerant performance than that of other conventional and hierarchical interconnection networks. The simple architecture of MMN is also highly suitable for NoC implementation. To implement all the links of level-3 MMN, only four layers are needed which is feasible with current and future VLSI technologies

Time-cost effective factor of a Midimew connected Mesh network

Hierarchical Interconnection Network (HIN) is indispensable for the practical implementation of future generation massively parallel computer systems which consists of hundred thousands nodes or even millions of nodes. Because it yields good performance with low cost due to reduction of communication links and by exploring the locality in the communication & traffic patterns. A Midimew connected Mesh Network (MMN) is an HIN comprised of numerous basic modules, where the basic modules are 2D-mesh networks and they are hierarchically interconnected using midimew network to construct the higher level networks. In this paper, we present the architecture of a MMN and evaluate the time-cost effective factor of MMN, TESH, mesh, and torus networks. It is found that the proposed MMN yields slightly high time-cost effectiveness factor with small diameter and average distance as compared to other networks. Overall, performance with respect to time-cost effectiveness factor with small diameter and average distance suggests that the proposed MMN will be a indispensable choice for the next generation massively parallel computer systems

Cost effective factor of a midimew connected mesh network

Background and Objective: Hierarchical Interconnection Network (HIN) is very much essential for the practical implementation of future generation Massively Parallel Computers (MPC) systems which consists of millions of nodes. It yields better performance with low cost due to reduction of wires and by exploring the locality in the communication\and traffic patterns. The main objective of this paper is to analyze the static cost effective factor of Midimew connected Mesh Network (MMN). Materials and Methods: A Midimew connected Mesh Network (MMN) is a HIN comprised of numerous basic modules, where the basic modules are 2D-mesh networks and they are hierarchically interconnected using midimew network to assemble the higher level networks. Results: This study, present the architecture of a MMN and evaluate the cost effective factor of MMN, TESH (Tori-connected Mesh), mesh and torus networks. The results shows that the cost effective factor of MMN was trivially higher than that of mesh and torus network. Conclusion: It was revealed that the proposed MMN yields a little bit high cost effectiveness factor with small diameter and average distance. Overall, performance with respect to cost effective factor with small diameter and average distance suggests that the MMN will be a promising choice for next generation MPC system

Effect of methanolic extract of Piper sarmentosum leaves on neointimal foam cell infiltration in rabbits fed with high cholesterol diet

Previous research has shown the beneficial effects of aqueous extract of Piper sarmentosum (P.s) on atherosclerosis. The first stage in atherosclerosis is the formation of foam cell. The aim of this study was to investigate the effect of the methanol extract of P.s on fatty streaks by calculating neointimal foam cell infiltration in rabbits fed with high cholesterol diet. Thirty six male New Zealand white rabbits were divided equally into six groups: (i) C: control group fed normal rabbit chow; (ii) CH: cholesterol diet (1 % cholesterol); (iii) PM1: 1 % cholesterol with methanol extract of P.s (62.5 mg/kg); (iv) PM2: 1 % cholesterol with methanol extract of P.s (125 mg/kg); (v) PM3: 1 % cholesterol with methanol extract of P.s (250 mg/kg); (vi) SMV group fed 1 % cholesterol supplemented with Simvistatin drug (1.2 mg/kg). All animals were treated for 10 weeks. At the end of the treatment, the rabbits were fasted and sacrificed and the aortic tissues were collected for histological studies to measure the area of the neointimal foam cell infiltration using software. The thickening of intima ratio of atherosclerosis and morphological changes by scanning electron microscope were measured. The results showed that the atherosclerotic group had significantly bigger area of fatty streak compared to the control group. The area of fatty streak in the abdominal aorta was significantly reduced in the treatment groups which were similar with the SMV group. Similarly, there was a reduction in the number of foam cell in the treatment groups compared to the atherosclerotic group as seen under scanning microscope. In conclusion, histological study demonstrated that the methanol extract of the P.s could reduce the neointimal foam cell infiltration in the lumen of the aorta and the atherosclerotic lesion

The usage of building information modelling (BIM) in Malaysia's architecture industry

Over the last few decades, the architecture field have seen tremendous developments in skills level, work processes and professional culture with the adoption of computer software technologies. Investment in technology has always been to increase effectiveness and overall performance in the design and construction process that results in a return of investment. Today, more and more digital technologies have been developed and created to accommodate the high demands of the market over the years, including Building Information Modelling (BIM). This research paper aims to look into the insight of how architect firms in Malaysia are coping up with the adoption of BIM in the country. This research was originally conducted in 2013-14 and has seen its preliminary findings published over the years. However, this paper uncovers the sequential parts of the research that has yet to be published. The main data collecting instrument used was a nationwide survey that was conducted on all the architectural firms in Malaysia and the findings was used as a foundation for subsequent research phases on the subject matter. From the findings, it is revealed that BIM-based practice is still at an infancy level and that the industry and government bodies need to put on greater effort and produce better strategies to make BIM an industry standard technology

Blockchain sadaqa mechanism for disaster aid crowd funding

There exist many online donation platform in the world and yet issues concerning extra fees, accountability and processing delay still exist.In this paper, we propose a decentralized, authentic and transparent donation system to address these issues. We explored several blockchain technologies and formulate smart contracts to be used in this sadaqa system to provide an efficient means to raising funds and managing aid relief for victims during disasters