Universiti Teknikal Malaysia Melaka: UTeM Open Journal System
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Finite Element Analysis of Spreader Bar by Utilizing the Arrangement and Connection of Padeyes
Get PDFHeavy lifting is one of several methods used for marine installation of heavy equipment while spreader bar (SB) is widely used in heavy lifting. The application of SB is mainly to avoid an overstress in the structure when being lifts which due to sling arrangement in bridle. SB is typically made of high strength tubular pipe with padeye/trunnion attached. Comparison between 3 types of padeye arrangements on SB is made based on its strength properties as reflected in API RP 2A 22nd edition to ensure its optimum design centred on material’s weight and welding work criteria. The buckling load for lightest pipe among 3 types of SB is then calculated. Finite element analysis (FEA) is performed to verify design stresses and buckling load of selected pipe. From observation, the thickness of tubular pipe can be reduced up to 50 percent compared to other SB types by setting the centre line (CL) of upper padeye to be in line with tubular pipe axis
Effect of Tensile Load on Electrical Resistivity of Stretchable Conductive Ink (SCI)
Get PDFTo date, research has tended to focus on emerging Electrical Conductive Adhesive (ECA) with stretchable and flexible substrate or known as Stretchable Conductive Ink (SCI). SCI is more flexible, stretchable and multi-purpose compare with the traditional printed circuit. Limitation on the chatacreization of SCI performance especially on it electrical performane under tensile stress has motivate this study. The aim of this research is to investigate the conductivity of the conductive ink under tensile stress at different elongation. The conductive ink carbon black was used to print on the thermoplastic polyurethane (TPU) and cure in the oven at 120°C for 30 minutes. The conductive ink was clamp using in-house stretching equipment with different elongation. The resistivity was measured by four-point probe while surface structure was observed by using Axioscope 2 MAT microscope. The result shows that the resistance increased when the elongation increased. For 40mm length of conductive ink, the initial resistance is 0.562 kΩ and its become 1.217 kΩ when stretch until 18% of its initial length. The sheet resistance of the conductive ink also increased due to the defection (porosity) on the surface of conductive ink after stretching. The strain level for 40mm and 60mm also increase form 0.14 to 0.16 that cause incerase in resistance. However, since there are no crack/defection observes at 80mm after maximum elongaton, the resistance start to decrease that cause increase in SCI conductivity
PENGARUH GAYA KEIBUAN TERHADAP PENERIMAAN MEDIA SOSIAL DALAM KALANGAN PELAJAR SEKOLAH MENENGAH (Influences of Parenting Style towards the Social Media Acceptance among the Secondry School Students)
Get PDFPenggunaan media sosial pada hari ini akan menjadikan proses pembelajaran menjadi mudah. Tidak kira di mana pelajar itu berada sama ada berada di kawasan sekolah, di luar sekolah, ataupun di rumah sendiri, pelajar tersebut boleh berhubung selagi liputan rangkaian internet berfungsi dengan baik. Kini, remaja dilihat banyak terdedah kepada penggunaan media sosial dan tidak dapat dinafikan bahawa media sosial mempunyai pengaruh yang besar dalam kehidupan remaja terutama yang bergelar pelajar. Apabila wujudnya penggunaan media sosial yang berleluasa, tidak akan terlepas dari kesan penggunaan media sosial tersebut. Justeru, kajian ini akan lebih menfokuskan penggunaan media sosial dalam konteks gaya keibuan dalam kalangan pelajar sekolah. Oleh itu, tujuan kajian ini adalah bagi mengenalpasti faktor-faktor yang mempengaruhi penerimaan media sosial berdasarkan gaya keibuan autoritatif, autoritarian dan permisif. Kajian ini melibatkan 313 pelajar sekolah menengah kebangsaan yang dipilih secara persampelan berstrata di daerah Kota Setar dan Kuala Muda. Hasil kajian dengan menggunakan analisis regresi berganda menunjukkan terdapat enam faktor yang didapati mempengaruhi gaya keibuan autoritatif dan autoritarian serta empat faktor mempengaruhi gaya keibuan permisif. Secara keseluruhannya, penerimaan media sosial dalam kalangan pelajar sekolah menengah didapati dipengaruhi oleh faktor gaya keibuan autoritatif, autoritarian dan permisif. Dapatan merumuskan bahawa ibu kepada responden dalam kajian ini mengamalkan gaya keibuan autoritatif, autoritarian dan permisif yang didapati mempengaruhi pelajar dalam penerimaan media sosial. Kata Kunci: media sosial; keibubapaan; keibuan; analisis regresi Using social media today make learning process easy. Either at school or home, students can connect to social media as long as the network coverage properly functions. Nowadays, teens seen much exposure to use social media and it is undeniable that social media has a greatE-ISSN: 2289-8115 ISSN: 1985-7012 Vol. 12 No. 1 January - June 2019 2 influence teenagers lives especially students. There are effects of the widespread of social media using. Thus, this study focuses on social media using in context of parenting style among student. Thus, the aim of this study is to identify the factors that affect students in accepting or using social media based on authoritative, authoritarian and permissive motherhood styles. The study involved 313 secondary school students were selected by stratified sampling in Kota Setar and Kuala Muda. By using multiple regression analysis it is found that there were six factors that affect motherhood authoritative and authoritarian style and four factors influencing motherhood permissive style. Overall, the acceptance of social media among students was found to be influenced by authoritative, authoritarian and permissive motherhood styles. The findings conclude that mother in this study adopt an authoritative, authoritarian and permissive motherhood style found to influence students in acceptance of social media. Keywords: social media; parenting; motherhood; regression analysi
THE EFFECT OF FACEBOOK ADVERTISING ON GENERATION Y PURCHASE DECISION
Get PDFThis research is to benefit the marketers to more effectively reach Generation Y customers as in this globalisation era. Hence, the aims of this research is to investigate the effect of Facebook advertising on Gen Y purchase decision and moderating effect of demographic factors on the relationship between perception of Facebook and purchase decision. The three perceptions proposed in the model, namely perceived trust, perceived informativeness and perceived risk with moderating effects of gender between perceptions of Facebook advertising and consumer purchasing decision. The quantitative research was used for 300 respondents from Gen Y participated were selected from Generation Y in Johor, Malaysia. Results of the research shows that perceived trust and perceived risk have a significant relationship with purchase decision, but perceived informativeness does not have a significant relationship with purchase decision. In addition, gender had a significant moderating effect on the relationship between perception of Facebook ads and purchase decision
The Effect Of Refolding Conditions On The Protein Solubility Recovered From Inclusion Bodies
Get PDFRecombinant proteins are expressed as inclusion bodies in bacterial enriched native-like secondary structure and thus give a great potential in biotechnological utilities. However, the quality of soluble proteins recovered from inclusion bodies is questionable because the refolded protein with wrong conformation will assemble to form aggregates. In this study, enhanced green fluorescent protein-inclusion bodies was used as the model protein to investigate the effects of protein concentration and purity on protein refolding. Three different types of solubized enhanced green fluorescent protein-inclusion bodies were refolded which were solubized inclusion bodies with cell debris, solubized inclusion bodies with detergent washing, and purified solubized inclusion bodies using preparative native urea-polyacrylamide gel electrophoresis. For the first and second conditions, the solubized enhanced green fluorescent protein-inclusion bodies were refolded at a high protein concentration and low protein purity environment. Polyacrylamide gel images show the refolded protein changed in conformation and increased in size when the solubized inclusion bodies underwent various refolding periods. Meanwhile, the refolded protein under the third refolding condition has a correct protein conformation and achieved the highest refolding yield. Studying the effects of refolding conditions using different types of solubized inclusion bodies may provide researchers with possible approaches to avoid soluble aggregates formation
Evaluation Study an Integrated Vital Sign Device by using Glucose Sensor for Auto-Capture of Biological Data
No full textNowadays, a lot of medical equipment has been integrated with the electronic device to make the medical equipment more users friendly. In this project, a device using glucose sensor to automatically capture the biological data will be develop to help the doctor to follow up the patient health information. The traditional medical equipment is to take the reading such as blood pressure, blood glucose level, temperature and etc. manually. Normally the traditional method will have many errors occur when taking the reading like parallax error or human error. Other than that, the traditional method also consumes lot of time when taking the biological data. In this project, a innovative device will be design and develop to take the biological data automatically which replace the traditional method of taking the glucose tests manually. The integrated device is expected to be designed for collecting the blood glucose data from the designed blood glucose measuring mechanism that is attached on a medical checkup chair and consequently integrate them into the personal medical database that can be transmitted through an USB device to a server. The traditional method consumes too much time from collecting sample until recording the data into the computer and human error may be occurring during recording the data. Hence, less time consume and fast action can be made by nurse and medical doctor to observe the patient current health information in order to provide the most suitable treatment to the patient from time to time
Flexible Parallel Bar for Physiotherapy Purposes
Get PDFThe utilization of parallel bars in rehabilitative and active recuperations is crucially critical in the medicinal services calling. Parallel bars are utilized to enable individuals to recover their quality, adjust, scope of movement, and freedom. For individuals recouping from wounds, ailments, and other crippling conditions, parallel bars are importance things of active recuperation, recovery, and exercise hardware. However, there are some obstacles while adjusting the bar height according to patient’s height. This is because the height of bar is adjusted manually by a physiotherapist. It will take time before the patient’s allowed to use it. Therefore, Flexible Parallel Bar is designed to address this problem. This design consists of a control unit that will control bar on the left and right. Control panel comprises a selection switch (left and right) and up/down button. Forward reverse motor is used to downward and upward the shaft according to the desired height. In addition, the parallel bar design is portable. This allows the family member assemble the parallel bar at home. This can save time to commute from home to a physiotherapy center where as the physiotherapy exercises can be done at home or everywhere that request by patient
Virtual Path Navigation using Two Rotary Encoders
Get PDFThe aim of this project is to evaluate the feasibility of the use of two rotary encoders in navigating an automated guided vehicle (AGV) in more complex virtual paths that include 90 and 180 degree turning from one to another desired positions. The proposed AGV was remotely controlled using a Bluetooth in a smart phone. The proposed AGV consisted of a microcontroller,two rotary encoders, an ultrasonic sensor, and a Bluetooth. The overshoot and systematic error was minimized using experiment data when the AGV was turning. The readings of the rotary encoders were mapped to the actual travel distance via calibration experiments so that the AGV can be redesigned to travel in different desired path without repeating the calibration experiments.Findings indicate that the proposed navigation method can navigate the AGV from one location to another location without installing any physical path or track
EXPERIMENTAL DESIGN APPROACH FOR STUDYING OVERHANGING FEATURES IN SELECTIVE LASER MELTING
Get PDFAs additive manufacturing (AM) processes become more refined and widely used, it is essential for engineers and designers to understand the processes in order to effectively use them within manufacturing systems; however, most of the existing methods for analyzing AM processes are too complex and specialized for use in practice. This study proposes a simple technique to derive information about the behavior of unsupported overhanging features in parts made using selective laser melting (SLM) using a first-principles finite element model and factorial experiment. This method can be used to assist with design decisions without production of prototypes, resulting in improved design and reduced cost. The case study presented examined five factors (laser power, laser spot size, scan speed, feature thickness, and the use of support material) in a 25 full-factorial arrangement with two stress and two deformation responses. An analysis of variance (ANOVA) was completed on the results, showing the significance of both the factors and the interactions between them. Two materials were studied (Ti-6Al-4V and 316L stainless steel). The results were compared to some similar stress and deformation results from experimental literature and were found to match well with the greatly simplified approach
EFFECT OF MAGNESIUM SURFACTANT ON WETTABILITY OF CARBON NANOTUBE IN A356 ALLOY COMPOSITE
No full textMWCNT-A356 alloy composite is a promising material for automotive applications owing to its excellent casting fluidity, good mechanical properties, high corrosion resistance and low density. However, wettability problem between the reinforced particles and alloy matrix is the major concerns. Poor wetting also caused inhomogeneity dispersion of the particles in the matrix. The present study investigated the effects of additional pure magnesium surfactant into the liquid state processing method on the mechanical properties of the composite. A thixoforming and short T6 heat treatment have also been applied to the composite. The composites were characterized using optical microscopy, field emission secondary electron microscopy and mechanical testing. As results, the weight fraction of 0.5 wt% of Mg, added into the 0.5 wt% MWCNT-A356 alloy composite improves the hardness, yield strength, and ultimate tensile strength by 1.4%, 9.2% and 4.0%, respectively. Some agglomeration of MWCNT was also detected in the 1.0 wt% MWCNT-A356 alloy composite. Evidences of bridging and pull-out structures of MWCNT were clearly observed indicating good wettability and load transfer strengthening mechanism. The results prove that the additional of small weight fraction of magnesium into the alloy matrix has positive impact to the mechanical strength of the composite