DEFORMATION PROPERTIES OF ENGINEERED CEMENTITIOUS COMPOSITE (ECC) WITH NANO SILICA

In this study, the deformation properties of Engineered Cementitious Composite (ECC) with Nano-Silica (nS) are tested based on four deformation properties with two different tests conducted, all the test conducted are based on the standard testing method following the American Standard Testing Method (ASTM). For this purposed, Initially 20 mixture of ECC were prepared by varying the percentage of Polyvinyl Alcohol (PVA) Fiber (0.5%-2%) and nS (0%-4%). From each mixture, 3 cylinders (100 mm x 200 mm), and 3 prisms (25 mm x 25 mm x 285 mm) are prepared. These samples are then cured in curing tank for 28 days before testing were conducted. The first test were conducted to monitor the shrinking properties of ECC after 28-days samples are cured and the second test were conducted to analyze the ECC strain behavior under applied compressive load. The ECC mixture consist of Fly Ash, Ordinary Portland Cement (OPC), Sand, Water, PVA Fiber and also Super Plasticizer (SP), a percentage of nS is added into the ECC mixture to investigate the effect of the nano size particle material in the ECC mixture towards the deformation properties. It is expected that at some amount of nS will be ideal to fill the pore spaces in the ECC mixture and improves the performance of materials of ECC, thus result in significant improvement in the deformation parameters

The Optimization Of T6 Heat Treatment On Microstructure And Mechanical Properties Of Thixoformed LM4 Aluminium Alloy

Thixoforming process is an attractive process that produces near net shape product with complex geometry. This process also produces lightweight parts that would reduce fuel consumption while maintaining their good mechanical properties. In this work, LM4 (light metal) aluminium alloys is used due to its low density among metals, high specific energy, good specific strength, high wear and high corrosion resistance. Thixoforming consists of three main processes that are thixotropic feedstock production, reheating and forming. The feedstock material for thixoforming was produced through cooling slope casting under argon gas atmosphere. Thixotropic feedstock is cast using cooling slope (CS) casting technique by pouring at 660 °C at 45 ° tilt angle with 400 mm slope length. The grains size and the shape factor is identified using the Image-J software. Differential scanning calorimetry (DSC) test is used to determine the heat flow and liquid fraction profile of LM4 aluminium alloy before thixoforming. The feedstock is then reheated in the induction furnace and heated up to their semisolid temperature at 580 °C (50 % of liquid content) followed by forming process by using vertical hydraulic press. After the thixoforming process, T6 heat treatment is conducted towards the thixoformed LM4 aluminium alloy with various combination of solution treatment (ST) and ageing temperature and time. The solution treatment is conducted at 510 °C to 530 °C for 30 min, 60 min and 120 min respectively followed by quenching and ageing at 160 °C to 180 °C for 2 hours, 4 hours and 6 hours respectively. Microstructure and phase formation were analysed using an optical microscope, scanning electron microscopy and X-ray diffraction while mechanical properties, coefficient of friction (CoF) and corrosion rate (CR) were obtained from hardness and tensile tests, wear test and corrosion test respectively. The result indicates that the solution treatment at 530 °C for 30 min, quenching in water and followed by ageing at 180 °C for 2 hours resulted in increased of the mechanical properties, wear resistance and corrosion resistance. The tensile strength, surface hardness, coefficient of friction and corrosion resistance of the thixoformed heat treated alloys is increased up to 252.387 MPa, 98.9 HV, 0.4259, 0.0102 mmpy respectively as compared to the thixoformed sample 184.526 MPa, 88.9 HV, 0.4321 and 0.0165 mmpy respectively. The microstructures of the T6 heat treated samples showed a spheroidization of eutectic silicon and the intermetallic phase Al2Cu, β-Al5FeSi and Al5Cu2Mg8Si6 were distributed homogenously in the sample. Based on the analysis, the new T6 heat treatment schedule with the solution treatment of 30 minutes showed a significant effect to increase the mechanical properties of the thixoformed alloys

Sinkretisme dalam adat masyarakat Bajau di Sabah

The spread of Islam in the Archipelago especially in Sabah has produced two forms of interactions which are Islamization and sincretizing. Islamization process that occured subtly and gradually at that time caused Bajau community easy to accept Islam without being forced. However, there are some practices of Bajau community that closely linked to the animism belief still being practiced to produced a process of syncretism. The objective of this article is to introduce Islamic methods by suggesting guidelines or legislation parameter in interacting with syncretism in traditions of Bajau community in Sabah. In facing syncretism between the traditional practices of Bajau with the teaching of Islam, there are at least three Islamic approaches towards the developed culture among Bajau community which are to accept, modify or reject. Therefore, an appropriate method of Islamic law need to prevail to handle the phenomenon in ensuring the balance between idealism contained in Islamic law with the reality of its implemantation in Bajau community. The study found that there are many symptoms of syncretism occured in tradition and culture of Bajau community which are difficult to know whether it is a genuine Islamic teachings or a relic of pre-Islamic tradition

Staff perspectives toward quality management practices at UNITI College, Pasir Panjang, Port Dickson, Negeri Sembilan / Azizul Abbas and Mohd Hijan Faiz Haddi

Quality management practices in organization are the prerequisite in seeking for achieved high performance. One of the tools used by many organizations including Higher Education Providers (HEP) is Malcolm Baldrige National Quality Award Criteria (MBNQA). UNITI College in Port Dickson, Negeri Sembilan is the one of HEP that have their own objective to get ISO certification by applying quality management practices based on MBNQA education for excellence criteria’s. The MBNQA criteria highlighted in this study are Leadership, Strategic Planning, Customer and Market Focus, Measurement, Analysis, Knowledge Management and Business Result. The purpose of this research is to assist the management of UNITI College in implementing quality management practices at their college before they applied for ISO certification. The significances of this research covered the top management, academic staff, student and researcher

DEFORMATION PROPERTIES OF ENGINEERED CEMENTITIOUS COMPOSITE (ECC) WITH NANO SILICA

In this study, the deformation properties of Engineered Cementitious Composite (ECC) with Nano-Silica (nS) are tested based on four deformation properties with two different tests conducted, all the test conducted are based on the standard testing method following the American Standard Testing Method (ASTM). For this purposed, Initially 20 mixture of ECC were prepared by varying the percentage of Polyvinyl Alcohol (PVA) Fiber (0.5%-2%) and nS (0%-4%). From each mixture, 3 cylinders (100 mm x 200 mm), and 3 prisms (25 mm x 25 mm x 285 mm) are prepared. These samples are then cured in curing tank for 28 days before testing were conducted. The first test were conducted to monitor the shrinking properties of ECC after 28-days samples are cured and the second test were conducted to analyze the ECC strain behavior under applied compressive load. The ECC mixture consist of Fly Ash, Ordinary Portland Cement (OPC), Sand, Water, PVA Fiber and also Super Plasticizer (SP), a percentage of nS is added into the ECC mixture to investigate the effect of the nano size particle material in the ECC mixture towards the deformation properties. It is expected that at some amount of nS will be ideal to fill the pore spaces in the ECC mixture and improves the performance of materials of ECC, thus result in significant improvement in the deformation parameters

Laporan cadangan rekabentuk dalaman bagi Highway Hotel di kawasan Rehat & Rawat Seremban, KM 273 Lebuhraya Utara Selatan, Negeri Sembilan / Mohd Azizul Zakaria

Projek ini adalah merupakan projek merekabentuk ruang dalaman untuk Highway Hotel di Kawasan Rehat dan Rawat Seremban, KM 273 Lebuhraya Utara Setatan, Negeri Sembilan Darul Khusus untuk tetuan Paradise Group. Tujuan projek ini dilakukan adalah untuk menangani masalah kemalangan yang berlaku di lebuhraya terutama waktu malam. Selain itu, ia dapat menyediakan tempat berehat yang selesa dan pengguna dapat beristirehat yang secukupnya bagi menyambung perjalanan atau ke destinasi seterusnya dengan selamat. Dengan ada projek seperti ini ia dapat membantu mengurangkan kadar kemalangan di negara ini dan dapat merealisasikan impian kerajaan dalam menangani masalah ini

Investigation on the effect of heat treatment process on corrosion enhancement of Co-Ni-Fe coated mild steel \ Mohd Azizul Sulaiman

Mild steel is the metal that usually used by oil and gas industry because it is a cheap material and easy to obtain in large-scale quantity but it has low corrosion resistance. Therefore, it is needed to be coated to increase its corrosion resistance. The objective of this research is to produce CoNiFe coating on the mild steel by using electrodeposition method. By applying heat treatment on mild steel that have been coated with nanoparticle CoNiFe, it is believed that it can produce a better coated mild steel with less porosity and lower corrosion rate. Heating process also provide a better surface hardness due to decrease size of the pore. Control of temperature and heating time is important in sintering process. Hence, this project was focused on the effect of heating temperatures and times on the corrosion and physical properties of CoNiFe coating. The coating parameters that were used are the optimum parameters that have been obtained from previous research. They are 3 pH value of electrolyte, 50 ± 5oC temperature of electrolyte, 30 minutes deposition time, 0.45A direct current and 0.025 A/cm2 of current density. Heat treatment process was conducted in a tube furnace in argon gas atmosphere to avoid oxidation during sintering process. Different times of 1, 2, 3 hours and different temperatures of 700, 750, 800, 850, 900oC, were used respectively. Coating by using electrodeposition method observed all element of CoNiFe are distributed evenly and homogenous. The effect of heat treatment was observed to produce a better corrosion resistance if compared with non- heat treated coating in 3.5% NaCl solution environment. The surface roughness and hardness was increased gradually with the increment of particle size and decrement of pore size respectively. Due to insufficient argon gas during heat treatment, oxygen was observed in EDX analysis as a result of oxidation

A model of engaging gamification mechanics for achieving MOOC learning outcomes among TVET learners

Gamification is the integration of game-like design elements into non-game context to engage learners. In tertiary education, researchers and practitioners have been seeking for effective ways to improve student engagement and promote learning. A number of study analyses examining the relationship between MOOC and learning engagement indicated that 25% of learner did not do activities and only 11.7% learner exceed learning goal. This study is conducted to introduce a model of engaging online learning using gamification mechanic (EG-MOOC) in achieving MOOC TVET learning outcomes. There are three objectives to be achieved in this study. The first objective is to determine what are the best appropriate gamification elements for TVET learners, the second objective is to propose a model of engaging online learning using gamification mechanics in achieving MOOC learning outcomes among TVET learners and the third objective is to validate the proposed engaging gamification massive open online courses model. This study applied quantitative methods. In analysis and design phase, the elements of EG-MOOC model were identified through data analysis from Analytical Hierarchy Process Analysis (AHP), documents review and finally validated by five experts. A prototype of EG-MOOC that integrates six gamification elements which are Virtual Goods, Wally’s Game, Trophies-Badged, Rewards, Skill Points and Peer Grading to measure learner’s engagement was implemented in Multimedia Systems subject through Open Learning platform. A total of 138 undergraduates from Bachelor of Computer Science (Interactive Media) in a Universiti Teknikal Malaysia Melaka (UTeM) had participated in a quasi-experiment. A pre-test-post-test design with control and experiment group was set up to examine the effects of gamification mechanics. There were three testing instruments used in this research, namely pre-test and post-test, administrative data from system and online survey of learner perception in gamification system. The research model is tested via Partial Least Squares Structured Equation Model. The findings show that overall model explaining 69.7% variance in learning engagement. Besides that, the result revealed that Badge for Behaviour had strong relationship in a direct effect towards learners learning engagement. Non-parametric test which is Wilcoxon Signal-Ranked Test was run to assess the student performance. Pre-test and post-test findings show that there is a positive effect on student performance. In conclusion, EG-MOOC model has a positive impact in improving learners’ engagement and encourage learners to achieve learning outcomes. Conceptual design of EG-MOOC system can be used as a guideline and model in the produce of gamification-oriented learning model and framework for other student groups

Effect of PAO-based γ-Fe2O3 and surfactant concentration on viscosity characteristic

This is a preliminary study on the viscosity characteristics of polyalphaolefin (PAO)- based γ-Fe2O3 under zero magnetic fields. By varying the concentration of magnetic nanoparticles (MNPs), PAO-based γ-Fe2O3 with different concentrations were synthesized by co-precipitation method. The effect of this factor on the viscosity characteristic of γ-Fe2O3 (< 30 nm) was investigated on the basic of a series of rheological measurement. The use of oleic acid (OA) as a coating agent and surfactant was also investigated by varying its concentration. The results show the concentration of MNPs and the amount of OA has obvious effect on viscosity characteristics of PAO-based γ-Fe2O3. In the case of comparison between the concentrations of MNPs, higher concentration of MNPs increased the viscosity of the PAO-based γ-Fe2O3 and exhibit nearly Newtonian behavior. The large amount of OA also exhibits the increment on viscosity characteristic of MNPs. The experimental data were compared with the Bingham and Casson model and the results revealed that the rheology of the polyalphaolefin (PAO)-based γ-Fe2O3 fitted the Casson model better

The Design and Implementation of Middleware for Application Development within Honeybee Computing Environment

Computing technology is now moving from ubiquitous computing into advanced ubiquitous computing environment. An advanced ubiquitous environment is an extension of ubiquitous environment that improve connectivity between devices. This computing environment has five major characteristics, namely: large number of heterogeneous devices; new communication technology; mobile ad hoc network (MANET); peer-to-peer communication; and Internet of Things. Honeybee computing is a concept based on advanced ubiquitous computing technology to support Smart City Smart Village (SCSV) initiatives, which is a project initiated within Digital Malaysia. This paper describes the design and implementation of a middleware to support application development within Honeybee computing environment