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 | Contributors |
| Effect of nozzle rotation angles and sizes on thermal characteristic of swirl anti-icing t /Mohd Azmi Ismail , Jian Wang The Federal Aviation Administration requires all ai rcraft manufacturers to ad here to maximum noise level standards. Thus, a bias acoustic l i ner is introduced. to intensi fy the noise eq u ipment system. as well as preven t ice accumulation on the nacelle 0-chamber. The hotspot phenomenon. by the Piccolo tu be anti-i<.:ing sysh:m. cou ld da... | 3/3/2020 | 5/18/2018 | Mohd Azmi Ismail - Author Jian Wang - Author | |
| Numerical analysis of TBM tunnel lining behavior using shotcrete constitutive model /Prof Madya Dr. Mohd Ashraf Mohd Ismail Shotcrete is a ftlndamental support element for tunnels and underground constructions. Shortly after application, shotcrete linings undergo a high load while the ordinary concrete is not fully hardened yet. Therefore, the time-dependent behaviour of the shotcrete material must consider. Traditional approaches assume a linear elastic behaviour using... | 3/9/2020 | 5/5/2018 | Prof Madya Dr. Mohd Ashraf Mohd Ismail - Author | |
| Melamine-nitrogenated mesoporous activated carbon derived from rice husk for carbon dioxide adsorption in fixed-bed / A.L. Yaumi, M.Z. Abu Bakar This work presents the preparation of melamine-nitrogenated mesoporous activated carbon from rice husk via single step chemical activation with phosphoric acid and subsequent modifica tion with mel amine for efficient carbon dioxide adsorption. The nitrogen-containing carbons were characterized for their textural and chemical properties an... | 12/30/2019 | 5/2/2018 | Yaumi, A.L. - Author Abu Bakar M.Z. - Author | |
| Effect of calophyllum inophyllum biodiesel-diesel blends on combustion, performance, exhaust particulate matter and gaseous emissions in a multi-cylinder diesel engine /H.G.How , H.H. Masjuki In this work, the effects of adding of inedible Calophyllum Inophyllum biodiesel to diesel fuel on performance, gaseous emissions, particulate matter (PM) and combustion characteristics were studied in a medium-duty, highpressure common-rail turbocharged four-cylinder diesel engine under different speed and torque conditions. The key physicochemica... | 2/26/2020 | 4/16/2018 | H.G., How - Author H.H. Masjuki - Author | |
| Effect of freezing temperature on the pore formation of beta /Dr. Nurazreena Ahmad . Beta-tricalcium phosphate (P-TCP) has been widely used for biomedical application due to its excellent mechanical strength, good tissue compatibility and outstanding chemical stability. There are several methods to fabricate porous scaffolds including solvent casting, phase separation, rapid prototyping and electrospinning methods. In the present... | 2/26/2020 | 3/1/2018 | Dr. Nurazreena Ahmad - Author | |
| Application of shotcrete constitutive model to the time dependent behavior of tbm tunnel lining/Heyam H. Shaalan, Mohd Ashraf Mohamad Ismail, Romziah Azit Shotcrete is ordinary concrete applied to the surface under high pressure. It demonstrates a highly time-dependent behaviour after few hours of application. Traditional approaches assume a simple linear elastic behaviour using a hypothetical young modulus to investigate the time-dependency and creep effects. In this paper, a new constitutive model ... | 3/9/2020 | 1/1/2018 | Heyam H. Shaalan - Author Mohd Ashraf Mohamad Ismail - Author Romziah Azit - Author | |
| Environmental monitoring and controlling system for mushroom farm with online interface /Arjuna Marzuki, Soh Yan Ying Agriculture sensors play an important role in modern agriculture. The use of sensors in various agriculture sectors minimizes the environmental impact on crops, helps in increasing yield and saving cost of operation. Among all agriculture industries in Malaysia, the mushroom industry is a comparatively new and small. As most of the mushroom farms i... | 3/9/2020 | 1/1/2018 | Arjuna Marzuki - Author Soh Yan Ying - Author | |
| Solid state lighting driver ic modeling using behavioral simulation technique/A. Marzuki, S. R. Abdul Aziz, Tun Zainal Ami Zulkifli Solid state lighting (SSL) technology has a potential to provide artificial lighting more efficiently, low cost and longlasting alternatives to conventional incandescent and fluorescent lighting sources. As the LED technology evolves, the applications involving LEDs are innumerable and its varieties impose a clear demand on design of controllable S... | 3/9/2020 | 1/1/2018 | Marzuki A. - Author Abdul Aziz S. R - Author Tun Zainal Ami Zulkifli - Author | |
| Analysis of pedestrian walking characteristics at vertical facilities in underground train station /Nur Sabahiah Abdul Sukor Kuala Lumpur is the national capital of Malaysia as well as the center of attraction for people looking for jobs. Thus, in the future people will tend to use public transport including the Light Rail Transit (LRT) more often than driving their vehicle. This is especially so due to critical traffic congestion on the road especially durin... | 12/21/2020 | 1/1/2017 | Nur Sabahiah Abdul Sukor - Author | |
| Analysis of pedestrian walking characteristics at vertical facilities in underground train station / Nur Sabahiah Abdul Sukor Kuala Lumpur is the national capital of Malaysia as well as the center of attraction for people looking for jobs. Thus, in the future people will tend to use public transport including the Light Rail Transit (LRT) more often than driving their vehicle. This is especially so due to critical traffic congestion on the road especially durin... | 12/30/2019 | 1/1/2017 | Nur Sabahiah Abdul Sukor - Author | |
| Asymptotic crack tip fields of surface cracked panels under non-hardening bending loads / Rizman Hariz Abdul Latiff and Feizal Yusof In this paper, the investigation of in-plane constraint loss in a semi-elliptical surface cracked panei(SCP)
specimen based on a detailed non-hardening finite element analysis with aspect ratios ale ofO.S and relative depths aft of 0.33 and 0.5 under bending loads. The asymptotic stress field solutions were compared to the fully constrained Prandt... | 12/21/2020 | 1/1/2017 | Rizman Hariz Abdul Latiff - Author Feizal Yusof - Author | |
| Evaluation of tunnel seismic prediction (tsp) result using the japanese highway rock mass classification system for pahang-selangor raw water transfer tunnel_W. C. Von , M. A. M. Ismail The knowing of geological profile ahead of tunnel face is significant to minimize the risk in tunnel excavation work and cost control in preventative measure. Due to mountainous area, site investigation with vertical boring is not recommended to obtain the geological profile for Pahang-Selangor Raw Water Transfer project. Hence, tunnel seismic pred... | 3/5/2020 | 1/1/2017 | Von, W. C. - Author smail, M. A. M. - Author | |
| Novel piezoelectric material characterization with hysteresis, creep, vibration and saturation non-linearity effects/Dr. Ahmad Zhafran Ahmad Mazlan, Prof. Dr Zaidi Mohd Ripin This research aims to investigate the presence of four non-linear characteristics (i.e., hysteresis, saturation, creep and vibration) when a piezoelectric patch material is acted as actuator for the AVC of a beam. The parameters such as frequencies and voltages are taken into account for the piezoelectric patch material characterization and the vib... | 12/18/2020 | 1/1/2017 | Dr. Ahmad Zhafran Ahmad Mazlan - Author Prof. Dr Zaidi Mohd Ripin Mohd Ripin - Author | |
| The effect of space holder content and sintering temperature of magnesium foam on microstructural and properties prepared by sintering dissolution process (sdp) using carbamide space holder/S.F. Aida , H. Zuhailawati , A.S. Anasyida Magnesium foam has gained a significant interest in structural application due to low density and greater strength than aluminium foam. In this study, magnesium foam was produced by sintering dissolution process (SDP) using spherical carbamide as the space holder. Magnesium foam was prepared using SDP at sintering temperatures (600 'C, 630 0 C, 650... | 3/5/2020 | 1/1/2017 | Aida S.F. - Author Zuhailawati H. - Author Anasyida A.S. - Author | |
| Evaluation of spalling fallout on excavation disturbed zone under deep hard rock tunnel / Romziah Azit The prediction of compressive stress-induced failures is of concern when designing and constructing facilities in rock for deep underground excavation. The purpose of this study is to model compressive stress-induced failure and fallouts with appropriate material models and strength parameters for deep hard rock tunnel excavation. Three method of n... | 3/5/2020 | 1/1/2017 | Romziah Azit - Author | |
| A single-stage led driver with voltage doubler rectifier/Nurul Asikin, Zawawi , Shahid Iqball, Mohamad Kamarol, Mohd Jamil In this paper, a configuration of a single-stage AC-DC converter and a high voltage resonant controller IC 1.6598 for LED street light driver is discussed. The converter is obtained by integrating two boost circuits and a half-bridge LLC resonant circuit. A voltage double rectifier circuit is adopted as output to lower the voltage stress on transfo... | 3/4/2020 | 12/2/2016 | Nurul Asikin - Author Shahid Iqball - Author Mohamad Kamarol - Author | |
| A grid-insensitive lda method on triangular grids solving the system of euler equations/Hossain Chizari, Farzad Ismail The performance of the classic upwind-type residual distribution (RD) methods on skewed triangular grids are rigorously investigated in this paper. Based on an improved signals distribution, an improved second order RD method based on the LDA approach is proposed to faithfully replicate the flow physics on skewed triangular grids. It will be mathem... | 2/26/2020 | 11/17/2016 | Hossain Chizari - Author Farzad Ismail - Author | |
| Developments of entropy-stable residual distribution methods for conservation laws 1 scalar problems /Farzad Ismail , Hossain Chizari This paper presents preliminary developments of entropy-stable residual distribution methods for scalar problems. Controlling entropy generation is achieved by formulating a entropy conserved signals distribution coupled with an entropy-stable signals distribution.Numerical results of the entropy-stable residual distribution methods are accurate an... | 2/26/2020 | 11/2/2016 | Farzad Ismail - Author Hossain Chizari - Author | |
| Modeling stress-induced failure for deep tunnel excavation of pahang-selangor raw water transfer project / Romziah Azita, Mohd Ashraf Mohamad Ismail The stress-induced failure, such as spalling and rock burst are considered as engineering disasters in deep underground excavations in hard rock. A practical predictive technique or a model to evaluate these stress-induced failures and a spalling strength is a concern in the design of support systems and excavations in underground tunnels. In the p... | 3/9/2020 | 10/18/2016 | Romziah Azit - Author Mohd Ashraf Mohamad Ismail - Author | |
| Effect ofnacl as a space holder in producing open cell A356 aluminium foam by gravity die casting process/ S.F. Aida , M.N. Hijrah, A.H.Amirah, H. Zuhailawati , A.S. Anasyida Gravity die casting is the technique which enables fabrication of open-cell A356 aluminium foam as a suitable absorber material with good quality performance. A356 aluminium alloy was used with varies amount of sodium chloride (NaCI) particles as a space holder to fabricate the aluminium foam using gravity die casting. Microstructural analysis, por... | 3/4/2020 | 1/1/2016 | Dr. Zuhailawati Hussain - Author Anasyida Abu Seman - Author | |
| Asymptotic crack tip fields of surface cracked panels under non-hardening bending loads / Rizman Hariz, Abdul Latiff , Feizal Yusof In this paper, the investigation of in-plane constraint loss in a semi-elliptical surface cracked panei(SCP)
specimen based on a detailed non-hardening finite element analysis with aspect ratios ale ofO.S and relative depths aft of 0.33 and 0.5 under bending loads. The asymptotic stress field solutions were compared to the fully constrained Prandt... | 12/30/2019 | 1/1/2016 | Rizman Hariz - Author Abdul Latiff - Author Feizal Yusof - Author | |
| Fabrication and characterization of hypoeutectic open-cell al-si foams using gravity die casting and squeeze casting /Samsudin Fitri Aida, Mirsad Nur Hijrah, Amirah Ahmad Hamdi, Hussain Zuhailawati, Abu Seman Anasyida Gravity die casting and squeeze casting are the techniques used for the fabrication of hypoeutectic open-cell Al-Si foams which are characterized and studied for their energy absorbing quality in compression tests. The effect of different amounts of sodium chloride (NaCl) (up to 56 vol.%) as a space holder in the casting of aluminum foam on the mor... | 3/4/2020 | 1/1/2016 | Zuhailawati, Hussain - Author Samsudin Fitri - Author Anasyida Abu Seman - Author | |
| The effect of space holder content and decomposition methods in fabrication of aluminum foams by powder metallurgy method using carbamide space holder/A. H. Amirah, M. S. Nurulakmal, And A. S. Anasyida The effect of space holder amount and decomposition methods on the morphology, density and porosity and compressive properties of aluminum foams were investigated. Aluminum foam was fabricated by powder metallurgy method using spherical carbamide as space holder using three different decomposition method of carbamide includes; dissolution process, ... | 3/5/2020 | 1/1/2016 | Amirah A. H. - Author Nurulakmal M. S. - Author Anasyida A. S. - Author | |
| Time-dependency behavior of steel fiber reinforced shotcrete lining under rock overstressing using shotcrete model / Heyam Shaalan A numerical analysis is implemented to estimate the time-dependent behavior of the steel fiber reinforced shotcrete lining (SFRS) using the constitutive model of shotcrete. Based on the concept of elasto—plastic strain hardening/softening plasticity, a new model of shotcrete is formulated, in which the time dependent strength, stiffness, creep and ... | 3/9/2020 | 1/1/2016 | Heyam Shaalan - Author | |
| An improved method to model semi-elliptical surface cracks using element mismatch in abaqus / R. H. A. Latiff , F. Yusof The purpose of this paper is to propose and investigate the feasibility of using multiple element types in a single model, termed element mismatch, for a three-dimensional semi-elliptical crack problem. The purpose behind the exploration of this method is to ease the meshing process in complex models. Multiple semi-elliptical surface ... | 12/21/2020 | 1/1/2016 | Latiff R. H. A. - Author Yusof F. - Author |
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