bluuebunny/crossref_metadata_2025 huggingface dataset:
Malaysian public survey on the current carry-on luggage handling onboard commercial transport aircraft
Authors: I Romli Fairuz , Hidayah Ariffin Nur
Published: November 2018

The current handling of carry-on luggage inside the aircraft cabin has led to several issues such as inefficient boarding and disembarking processes. Due to the number and size of current carry-on luggage, the boarding process has been slowed down due to aisle blocking and luggage overcrowding in the overhead storage bins. To improve this situation, an automated cabin luggage system has been proposed. A public survey has been conducted to explore the general passengers' perception of current carry-on luggage handling inside the cabin and to identify potential rooms for improvement that can be catered by the automated cabin luggage system. The responses obtained from the survey indicate that the current carry-on luggage handling does have several weaknesses that can be improved by the proposed automated system.Â Â
Fire behavioural and mechanical properties of carbon fibre reinforced aluminium laminate composites for aero-engine
Authors: Mohammed Ibrahim , Rahim Abu Talib Abd , Thariq Hameed Sultan3 Mohamed , Sadoon Syamimi
Published: November 2018

Two different properties of fibre-metal laminate composites (FML), including the fire behaviour and mechanical properties, were experimentally studied in this paper. The fibre-metal laminate composites studied were made of aluminium alloy 2024-T3, carbon fibre, flax, kenaf and epoxy resin/hardener arranged in different forms. The aims of the study are to assess the fire behaviour of the composites using ISO2685 standard and mechanical properties of the composite after withstanding the burn-through according to the standard. The fire test was carried out using ISO2685 standard using a propane-air burner, whereby the propane gas and air serves as the fluid to the system. The universal testing machine of the 100 kN load cell and gun tunnel were used for the mechanical properties test according to each test standard. The fire results showed that three of the FML composites considered in the study are fireproof composites while carbon fibre kenaf reinforced aluminium laminate (CARALL4) is a fire resistant composite. Carbon fibre reinforced aluminium laminate with aluminium alloy at the front and the rear face (CARALL2) withstood higher flame temperature than the other FML composites with 14.4%, 49.0% and 82.8% greater than CARALL1, CARALL3 and CARALL4 in terms of thermal conductivity. In terms of mechanical properties, it was also CARALL2 that has higher tensile, compressive, flexural and impact strength. Therefore, the study showed that carbon fibre flax reinforced aluminium laminate (CARALL3) which is the hybrid composite with green fibre can compete with fibre-metal laminate composites of pure synthetic fibre in terms of their properties.Â Â
An overview of passive and active drag reduction methods for bluff body of road vehicles
Authors: Chuan Eun Lay , Shakrine Mohd Rafie Azmin , Wiriadidjaja Surjatin , Faruqi Marzuki Omar
Published: November 2018

This paper is an overview of results done on bluff body road vehicleâ€™s base drag reduction either by experimental or numerical methods. Two categories of devices are divided that prove certain degrees of effectiveness in reducing the base drag, namely passive and active. The reduction of drag coefficient achieved in existing research ranging from 5% to 50%, which varies for each method and device. However, the higher the achieved drag reduction is, the greater the compensation required is. The compensation comes in various forms to achieve the desirable drag reduction. For passive drag reduction, hump shaped bluff body with boat-tail shows significant drag reduction by 50.9% compared to the other methods. Meanwhile, one of the potential of active drag reductions is by utilizing rotating cylinder. The rotating can reduce the drag on the bluff body by influencing the separation of boundary layer. The drag can be further reduced by enhancing the rotating cylinder with surface roughness and rotation speed. A notable 23% reduction of drag coefficient using rough surface on bluff body vehicleâ€™s is achieved compared to the smooth surface.Â Â
Sensitivity analysis on the model input parameters of flapping wing kinematics for optimum level flight via particle swarming optimization
Authors: Faisal Abdul Hamid Mohd , . .
Published: November 2018

A systematic reviewing process to assess the sensitivity of the input parameters of flapping wing kinematics for optimum level flight is presented. This is done prior to the development of a stroke optimization model to predict the aerodynamic performance of an insect (hawk moth) during flight. A systematic iterative process-population-based stochastic algorithm, known as particle swarming optimization, is used. In the search for an optimal realistic wing kinematic motion, several constraints for stable flight are defined following the observational wing kinematics data from experiments on real insects. This is to avoid any physically-unrealistic solutions of the wing motion. Two stages of sensitivity analyses are conducted via partial sensitivity analysis, or one-atâ€“a-time. First, sensitivity screening analyses are performed to gauge the dependability of the solution output, i.e. total force and total power, on each model input parameter; a total of 9 model input parameters. Then, the second stage of sensitivity analysis to measure on how the most sensitive model input parameters will affect the optimized kinematics are conducted. The results have shown that the wing length and the wing translational lift coefficient are the most sensitive aerodynamic model input parameters among other inputs.Â
Performance measure of satellite flying in coplanar and non-coplanar formation
Authors: Affendy Yahya Nor , Varatharajoo Renuganth , Salahuddin M Harithuddin A , Azrad Syaril
Published: November 2018

In order to fulfil specific mission objective demand, spacecraft performance can be further optimized by means of various methods or configurations. Like for instance, selection of orbit type and inclination with a periodically repeated ground track will ensure the high efficiency of ground target coverage be accomplished throughout the whole duration of mission. Unfortunately, a single monolithic satellite most often unable to accommodate the requirement solicitated by many multi background users. So, to deal with the issue, an alternative solution would be to operate a swarm of satellites flying in synchronized formation. In this paper, three satellites flying in co-planar and non-coplanar formation were simulated. Here, the resulting model of two deputy satellites operating in the same orbital plane but different phase angle moved along the orbit path while both still maintaining constant relative distance with the non-coplanar chief spacecraft throughout the whole orbit period were presented. The use of unique projected circular orbit (PCO) formation arrangement allows the assessment of some important performance measure parameters like average overlapping coverage area and optimum swath width coverage distance. For the determination of area on the surface of the Earth overlapped by three satellites, the analysis was done using the multiple boundary overlap condition. Parametric studies were conducted involving different formation distance and formation height to observe pattern variation of average total overlapping area and maximum coverage distance. Preliminary result showed that at a specific Earth central angle, the total overlapped area decreased substantially with the increased distance in formation. Height factor does not have significant influence in the total overlapped area variation due to constraint imposed on satellites operating in Low Earth Orbit (LEO) altitude regime. Results were tabulated using 3-dimensional graphs to study the relationships exist between multiple variables. Finally, conclusions were made based on our findings with regards to the performance of positioning satellites in such configuration.Â
Preventing human error at an approved training organization using Dirty Dozen
Authors: Ghani Abdul Samad Abdul , Khudri Johari Muhd , Omar Sabri
Published: November 2018

Following a recently-submitted review on a few human factor identification models (interpretations of Professor Edwardsâ€™ SHELL Model, Boeingâ€™s Maintenance Error Decision Aid (MEDA), Professor Reasonâ€™s Swiss Cheese Model, and Dupontâ€™s Dirty Dozen), researchers have unanimously agreed on choosing the Dirty Dozen model for this quantitative study before its official implementation in hangars and workshops at Universiti Kuala Lumpur â€“ Malaysian Institute of Aviation Technology (UniKL MIAT). This study measures the levels of awareness and effectiveness of UniKL MIATâ€™s current human factor safety practices. A specifically-tailored, comprehensive, Dirty Dozen checklist is produced and distributed as survey questionnaire to 120 UniKL MIATâ€™s students. Data from all 48 questions related to all 12 domains of Dirty Dozen are analyzed. The results shows that out of all 12 domains, six (Lack of communication, Lack of teamwork, Norm, Pressure, Lack of attention, Stress) are marked with â€œAgreedâ€ and the other half (Complacency, Lack of knowledge, Lack of resources, Distraction, Lack of authority, Exhaustion) are marked as â€œNot Sureâ€ in terms of awareness and effectiveness of their current human factorâ€™s safety practices. These results will be reviewed by the top management of the university to take preventive actions and improvements for future human factor safety implementations. As Dirty Dozen is known to be the simplest technique to measure human error, it is significantly appropriate to be applied as this experimentâ€™s variable, especially for students who are still studying and have no industrial working experiences.Â Â Â
Development of an aircraft load planning system for distribution of passenger baggage
Authors: A Jumat N , J Abdullah E
Published: November 2018

Airplane has been widely used as transportation compared to ship or car due to the short time journey. This phenomenon contributes to high demand or airline network for many places around the world and resulted in more competition for the airline industry due to changes in economy and increase in number of airlines. Besides, the increase in price of fuel can also be a major burden to the airline to maintain or gain profit. In order to overcome the fuel and cost problem, few measures can be taken including implementing effective aircraft loading system to optimize fuel weight and manage centre of gravity (CG), an aerodynamically clean aircraft, flight planning based on good data and optimal use of systems for example bleed, flaps and gear. For this study, load planning system for a Boeing 737-800 aircraft is considered to obtain a good position of CG for better fuel consumption. A load planning system was designed and developed using LabVIEW 2016 which can easily be integrated with sensors to produce a complete system. This system capable of receiving baggage weight as input and arranging the baggage to ensure the CG location is within the stipulated range. The efficiency of this system was validated by testing an aircraft model inside a wind tunnel and observing the performance of the aircraft when loads were arrange randomly and also based on the proposed arrangement by the system. As a result from the testing, by arranging the loads using the system that has been developed, a better flight performance in term of lift to drag ratio can be obtained which was 10.2 compared to randomly arranging the loads which was 7.9. Thus, by having a good load planning can reduce the fuel consumption and also improve the flight performance.Â
Development of attitude control system for hybrid airship vehicle
Authors: Malek Azizi , F Sedan M , S M Harithuddin A
Published: November 2018

This paper documents and presents the development of attitude control system of Hybrid Airship Unmanned Aerial Vehicle (HAU) that should be able to change its attitude condition based on the response processed from the provided input. This is accomplished by data acquisition method that retrieves data from a flight controller and processes it into the control system without looking in deep on the mathematical model of the airship. Besides that, PID controller is used in order to create a good stable response for the hybrid airship. A working hybrid airship prototype was successfully developed and built, which is five meters in length and has four propellers that is symmetrically distanced to each other. A quadcopter attitude control mechanism is adopted into the hybrid airship to allow for good hovering capability and direct pure attitude control. Outdoor flight tests have been conducted to prove its stability in responding to attitude input given to the hybrid airship attitude controller. A data monitoring software is also written to make the data observation on the behaviour of the hybrid airship response to be easier and understandable. Result demonstrates that the hybrid airship does response to pitch, roll and yaw input from the operator, albeit the lack response stability and speed which can be improved in conservative continuation of research on the airship attitude control system.Â Â
Investigation of closed compartment moulding for pull-winding process
Authors: Malek Yaâ€™acob Abdul , Daniel Aizat Mohd Razali Mohamad , Abdillah Anwar Umar , Arif Hakimi Mohd Radhi Mohd , Aizat Afifi  Ishak Muhammad , Minhat Mulia , Dahri Mohd Aris Khairul , Khudri Johari Muhd , Teh Casey
Published: November 2018

This project investigates the closed compartment moulding design for pull-winding process. This is a continuation of an initial study that involved discovering how the permeability effect inside a close compartment in pull-winding processing. The mould has been designed to ensure resin penetration to the preform. The mould design has been divided into three parts for easy installation, maintenance and also cleaning after use. The mould has been tested on an actual production line at TenAsia Sdn. Bhd. The test is conducted by pulling mechanism where the machine pulls the preform winding forward when it is switched on. In this process, the resin is flowing through the hose and it has been sprayed out by the nozzle inside the mould to the preform. The test has been done using 2, 4 and 6 nozzles with various pressures to determine which one is the most suitable for penetration and covering up the preform. Based on the results, the most economical and productive design has been identified as spray type with 2 upper and lower nozzles running at an appropriate pressure of 20 psi. This pressure has been chosen based on the area covered on the preform surfaces and time taken to penetrate the preform layer. In conclusion, 20 psi pressure works better due to the resinâ€™s deeper penetration in shorter time, less mist and very minimal excess resin.Â Â
Performance analysis of an Organic Rankine Cycle system with superheater utilizing exhaust gas of a turbofan engine
Authors: A M Nasir N , Saadon S , R Abu Talib A
Published: November 2018

Waste heat recovery is recognized as one of the methods to overcome this energy saving issue. In this paper, the Organic Rankine Cycle (ORC) system has been introduced for the waste heat recovery. The main objective of the study is to convert the unused heat into useful power, which could reduce the fuel consumption and also minimize the harmful exhaust transmission. A thermodynamic model of the waste heat recovery cycle is developed and validated. The eventual results depict a reasonable agreement for the ORC power output and its thermal performance, especially at higher turbine inlet pressure. Consequently, this ORC model is then connected to a turbofan engine. The performance analysis of the engine depicts that the lowest Thrust Specific Fuel Consumption (TSFC) is at 0.68 lbm/lbf.h with the thrust force of 7000 lbf, thus lower than the base cycle without ORC as waste heat recovery.Â Â
Lift force for cylindrical and elliptical CoandÄƒ aircraft design
Authors: Faisal Abdul Hamid Mohd , Shakrine Mohd Rafie Azmin , Gires Ezanee , Rahim Abu Talib Abd.
Published: November 2018

Small aerial vehicles possess advantages in terms of size and accessibility in performing a variety of tasks. Presently, their design and performance is dependent on variations of conventional aerodynamic configurations (fixed- and rotary-wing). A disadvantage for these configurations is the aerodynamic potential between the mainstream airflow and the body surfaces are not fully utilized. To solve this issue, the CoandÄƒ effect is proposed whereby a high-velocity jet is blown tangentially over a curved surface to increase circulation and lift. Prior to the costly approach (experimental and numerical), an analytical formulation (via control volume analysis) to predict the aerodynamic CoandÄƒ lift force of the design concept is developed. This is an extended version of the existing mathematical formulations, capturing viscous flow effects. It is also pertinent for circular and elliptical-shaped designs. The results obtained show that the total lift force is dependent on the jet velocity, outflow angle, dimensions of the jet slot, the projected surface area, and the viscous effect. The approach has demonstrated how this modelling technique is effective in calculating the lift force for cylindrical and elliptical CoandÄƒ aircraft design.Â Â Â
Semi-infinite solid heat transfer limitation
Authors: Ramdhaney Mohd Saiah Helmey , Shakrine Mohd Rafie Azmin , Izzuddin Romli Fairuz , Salahuddin Mohd Harithuddin Ahmad
Published: November 2018

One-dimensional semi-infinite heat transfer solution is a common solution for transient heat transfer experiments. This solution is valid for a short certain amount of time before the semi-infinite solid became invalid. Crank Nicolson solution has been chosen to address this issue. This paper reports the time limitation for semi-infinite solid solution and justify the usability of Crank Nicolson solution given the same boundary conditions. The flat plate heat transfer experiment has been conducted. With the same boundary conditions, at Fourier number 0.1, the resultant heat transfer coefficient and adiabatic wall temperature have shown a good agreement between the semi-infinite solid solution and the Crank Nicolson solution. Beyond this Fourier number, both solutions have given inaccurate results. The inaccurate results are due to unsuitable boundary conditions. Future work will involve modification of the back face boundary conditions to address the time limitation of the one-dimensional semi-infinite solid heat transfer solution.Â Â
Parametric study of varying ribs orientation and sweep angle of un-tapered wing box model
Authors: Nee Chan Ying , Yazdi Harmin Mohammad , Safuan Othman Mohd
Published: November 2018

A simple un-tapered wing box model was considered to illustrate an aeroelastic tailoring of varying ribs orientation with respect to a range of sweep angles. This approach allows the bending-torsional modes characteristic to be altered hence offering possibility for improvement in aeroelastic performance without having to compromise its overall weight. Two cases of ribs orientation were considered for a range of sweep angles. The first case was by allowing one individual ribs to be orientated at a time and the second case considering all possible combination of ribs orientation. The finding shows that the torsional modes are greatly influenced by the rib orientation while the bending modes are not significantly affected. Therefore, this enable the frequency gap between the flutter modes to be altered; hence resulting into significant impact to aeroelastic performances. It has been found that for all the considered sweep angles, the varying ribs orientation can lead into an improvement of nearly 80-90% when compared to its corresponding baseline configuration. Therefore, this provides a leverage for an advancement in aeroelastic performance without having to penalize the total weight of the wing structure.Â Â
Review of improvements on heat transfer using nanofluids via corrugated facing step
Authors: Hilo Ali , Rahim Abu Talib Abd , R. Nfawa Sadeq , Thariq Hameed Sultan Mohamed , Faisal Abdul Hamid Mohd
Published: November 2018

Nanofluids are considered to offer significant advantages as thermodynamic fluids because of their admirable properties on thermal conduction, thermal convection, boiling heat transfer and stability. This paper presents numerous researches focusing on the improvement of heat transfer via facing step and corrugated channels using nanofluids and without it. Exploration on the convective heat transfer was done through numerical modeling. It was reported that experimental studies were carried out in corrugated and facing step channels through the application of nanofluids and conventional fluids for heat transfer enhancement. The turbulent and laminar flows along corrugated and facing step channels have been presented. The numerical and experimental findings in maximizing the heat transfer rate are in accord. Comparisons between thermal conductivity measurement methods were done. Innovative design of corrugated facing step channel is being proposed. The heat transfer enhancements reach 60% by using facing step channel under laminar flow with nanofluid. The dimensions of new channel such as height and width of the baffle, the height of the step, shape and height of corrugated are needed to compare that might to provide the ideal rate of heat transfer.Â Â
Simulation framework for civil tiltrotor mission performance
Authors: Gires Ezanee , . .
Published: November 2018

A simulation framework for the overall mission performance of a civil tiltrotor system is presented. In this work, a numerical model of a benchmark tiltrotor aircraftâ€™s flight dynamics is paired with a high-fidelity simulation of the turboshaft powerplant. The gas turbine simulation of the baseline engine is shown to have high accuracy with its available performance data from flight and stationary tests. The simulation is further validated by the obtained maximum range and endurance performance based on the XV-15 tiltrotor. The power requirements during the different phases of tiltrotor flight are also modelled including the transition phases between rotary- to fixed-wing. A mission framework is designed to show the estimated fuel burn and emissions. The mission procedures are based on the flight envelope data available in the public domain as well as modern helicopter operations. This work can be used as the baseline for the modelling of conceptual configurations of civil tiltrotors, particularly for variations in powerplant technologies.Â Â
CFD simulation of local exhaust ventilation for aviation fire-test lab
Authors: S H Al-Ammari Aiman , S M Altarazi Yazan , Rahim Abu Talib Abd. , Nadiir Bheekhun M
Published: November 2018

Excellent indoor air quality in an enclosed area has always become a major safety aspect in designing a building. Issues with regards to circulation of air and exhaust system must be first resolved before the said building can be used for any purposes. The goal of this study is to identify ways to improve air quality in the aviation fire test room at the Propulsion Laboratory that is located in Universiti Putra Malaysia (UPM), Selangor, Malaysia. A computational fluid dynamics (CFD) method was employed to predict the air contaminant inside the lab. When performing the activities, the indoor air quality have to be ensure circulated and ventilated in the lab. Using a mechanical fans and natural ventilation are a traditional method to provide indoor air quality into the propulsion. Whereby, this method may not be enough to provide the required indoor air quality for specific aviation fire-test setup. Such labs may suffer from increasing air contaminant based on the improper and irregular air distribution. A grid independent test (GIT) was done to reduce the effects of meshing on the results was carried out to estimate the discretization error. Computational fluid dynamic (CFD) method was carried out to identify a suitable ventilation system that would result in the greatest improvement in the indoor air quality (IAQ) inside the lab. The results of using the CFD simulation show that installing Local Exhaust Ventilation (LEV) at the lab could significantly improve the IAQ inside the lab. The airflow increase by 84% and the CO, CO2 and NO reduce by 84%, 89 and 81%, respectively. Improvement of the IAQ by increasing the airflow and reducing in the air CO, CO2, and NO, which can be considered as very significant achievement.Â Â  Â
Aerodynamic performance of X-plane with two different types of inboard stores
Authors: Azrad S , I Hassim M
Published: November 2018

Renewable energy plant research such as wind energy has been on the rise for the past few decades. The objective of this paper is to do a conceptual exploration of the new type of wind harvesting system known as Airborne Wind Energy System (AWES) to be used in Pulau Perhentian Kecil using Model-Based Systems Engineering Approach (MBSE) where the final selection is chosen using TOPSIS method. There are several types of concept designs to choose from based on their unique mode of operation. The candidate concept designs are from Ampyx Power B.V, Magenn Power, Makani and Altaeros Energies. From the TOPSIS analysis, Ampyx Power B.V has been selected due to its highest fulfilment of the requirements. This exploration into several potential AWES may help solve the deficiency of the current systems and advantageously utilise the suitable geographical factors of Pulau Perhentian Kecil.Â
FPGA implementation of 1000base-x Ethernet physical layer core
Authors: Salem Eman , Zekry Abdelhalim , Labeb Hossam , Tawfik Radwa
Published: November 2018

This paper introduces the field programmable gate array FPGA implementation of 1000BASE-X PHY Physical Layer for gigabit Ethernet over fiber optic cable. The implementation is achieved by developing VHDL model for all its building blocks including the physical coding sub layer, PCS, and the physical medium attachment, PMA. The VHDL code is simulated using XILINX ISE14.7 and synthesized on Xilinx Virtex6 FPGA chip. Measured results show that the designed and implemented Ethernet transceiver works successfully at 1.32 Gb/s, 2.5V supply with reduced power consumption.
AOCR: adaptive on chip router algorithm for multicore domain controller platform
Authors: Shanmuganathan T , Ramachandraiah U
Published: November 2018

In the recent years, with the rapid development of semiconductor technologies and increasing demand for more effective multi-Core Domain Controller platforms, there is a clear demand for effective routing algorithms that can be used to route the packets between these platforms, while enhancing an on chip network performance, achieving a better latency and throughput. This paper proposes an adaptive on Chip Router algorithm with a simple adaptive routing algorithm based on runtime weighted arbitration and resource allocation methodology, where the routing decisions are minimized for applications-specific MDCU platforms. The proposed scheme is evaluated by simulations and its performance in terms of latency, area, power consumption and cost reduction per vehicle are presented. The results show that, 24.5% of latency reduction, 62.25% area utilization optimization and 63.76% of energy efficient compare with existing methods.
Improvement of sub region matching illumination transfer in hybrid shadow removal method for moving vehicle video
Authors: Setiyono Budi , Ratna Sulistyaningrum Dwi , . Soetrisno , Al-Habib Hasanuddin
Published: November 2018

Intelligent Transportation System (ITS) is a concept to manage transportation based on technology development. Video from surveillance cameras can be used for monitoring the number of vehicles and speed using digital image processing. Shadows on the vehicle is one of the noise that must be removed in order to obtain better accuracy. Shadow is caused by the reflection of objects exposed to the light. In this study, we combined two methods to eliminate shadows on moving vehicle, the subregion illumination transfer method and the background-based Gaussian mixture model. Foreground image is used for sub-Region Illumination Transfer and gamma decoding processes is used to detect the presence of shadows The detected shadow is removed by replacing it with the background in that position. Experiments are done by making simulated video of moving objects without shadows and objects that have a shadow. By using the proposed method, the shadow will be omitted, and the results are compared with the object without the shadow. The experimental results are: mean value of PSNR for objects moving closer to the camera with a light intensity of 0.8 is 53.47. While on the moving object with a small shadow area, we obtained an average PSNR of 51.87927dB.
Empirical Evaluation of Design Level Metrics for Aspect Oriented Business Process Execution Language in SOA
Authors: S Senthil Velan , M Sam Jaffray
Published: November 2018

Service Oriented Architecture (SOA) facilitates seamless application integration through standards-based predefined web services. During integration, Business Process Execution Language (BPEL) plays a vital role in composing existing Web Services thereby achieving a service based workflow model.   Due to frequently changing business requirements, it becomes very much essential for an SOA application to have the capability to dynamically bind with an alternate service rather than statically fixing the services in a given composition. However, BPEL lacks support for the run-time inclusion of a new Web Service or functionality. Aspects overcome this limitation by providing support to independently encapsulate the cross-cutting functionalities by separating them from the core business logic. Using AOP, it is possible to achieve dynamic binding in web service composition. To illustrate the embedding of AOP constructs into a BPEL process, this paper implements a case study on distributed e-HealthCare system. Further, two core design level properties namely, cohesion and coupling have been measured and the impact of introduction of AO into a composed BPEL process has also been discussed. Empirical evaluation of the design level properties shows that cohesion improves by the introduction of AOP in BPEL.
Robot navigation with obstacle avoidance in unknown environment
Authors: Kumar Neerendra , Vámossy Zoltán
Published: November 2018

In this paper, a robot navigation model is constructed in MATLAB-Simulink. This robot navigation model make the robot capable for the obstacles avoidance in unknown environment. The navigation model uses two types of controllers: pure pursuit controller and fuzzy logic controller. The role of the pure pursuit controller is to generate linear and angular velocities to drive the robot from its current position to the given goal position. The obstacle avoidance is achieved through the fuzzy logic controller. For the fuzzy controller, two novel fuzzy inference systems (FISs) are developed. Initially, a Mamdani-type fuzzy inference system (FIS) is generated. Using this Mamdani-type FIS in the fuzzy controller, the training data of input and output mapping, is collected. This training data is supplied to the adaptive neuro-fuzzy inference system (ANFIS) to obtain the second FIS as of Sugeno-type. The navigation model, using the proposed FISs, is implemented on the simulated as well as real robots.
Glaucoma diagnosis using discrete wavelet transform and histogram features from fundus images
Authors: Kirar Bhupendra , Agrawal Dheeraj
Published: November 2018

Glaucoma is one of the main eye diseases; it cause progressive deterioration of optic nerve fibers due to increased fluid pressure. The existing methods of glaucoma diagnosis are time consuming, expensive and require practiced clinicians to understand the eye problems. Hence fast, cheap and more accurate glaucoma diagnosis methods are needed. This paper presents an innovative idea for diagnosis of glaucoma using third level two dimensional discrete wavelet transform (2D DWT) and histogram features from fundus images. The 2D DWT is used to decompose the glaucoma and healthy images and histogram features are extracted from 2D DWT decomposed sub band images. The least square support vector machine (LS-SVM) is used as a classifier which classifies the glaucoma and healthy images using the extracted features. The proposed method yielded classification accuracy of 88.33%, 87.50%, and 86.67% for ten, eight and fivefold cross validation respectively. The obtained classification accuracy, sensitivity and specificity are 88.33%, 90.00%, and 85.00% for tenfold cross validation respectively. Obtained results prove that the performance of the proposed method is better compared to the existing methods. It may considerably increases the diagnosis speed of ophthalmologists.
An investigation on design innovation, fabrication and experiment of a soy bean peeling machine-scale
Authors: Nguyen Van Thanh Tien , Anh Dang Van , Thoai Tran Ngoc , Hoang Nguyen Cong , Hoa Vo Dai , Khoa Nguyen Dang , Lam Nguyen Ngoc , Lam Nguyen Quang , Long Tieu Thien , Nam Bui Tan , Bao Tran Tien
Published: November 2018

This study on the mentioned machine is to intend to peel seed coat of dried soybean that applies the friction principles between the seed coat and the conveyor belt. Creating largely frictional contact on the surface of the soybeans leads to the broken link of the seed coat which is responsible for peeling away the seed coat from the soybeans completely. This work demonstrates the design parameters and the fabrication method including the number of rotations of the two conveyors, the contact distance between the conveyor and soybeans. The recommended values of the parameters after studying are carried out as following: the revolution is 120 rpm, the gap between the conveyor and the bean is 6 mm and the conveyor belt width is 400 mm. Based on these results, the finished product reaches around 80.06 percent and the productivity achieves 15 kilograms per hour.
Water content effect on biofilm formation and bio-corrosion process in biodiesel-diesel storage tank
Authors: Nur Ramadhani Aida , Harimawan Ardiyan , Devianto Hary
Published: November 2018

This study focused in the effect of water content on biofilm and bio-corrosion, and knowing its influence on biodiesel-diesel blends’ quality. Biodiesel is hygroscopic and less stable, makes this fuel needs more attention in storing. Fuel is usually stored in a storage tank of carbon steel which easily corroded by microorganisms, such as Bacillus megaterium. Corrosion occurs because microorganisms use fuel as nutrients and water content in hygroscopic biodiesel supports to grow and metabolize. Experiments were carried out by immersing carbon steel in medium 30% biodiesel (B30) for 21 days with water content variation of 0%, 5%, and 10% volume. The number of colonies in biofilms increased up to 1,3 times in a 10% water content. A uniform biofilm provides an inhibitory effect on corrosion per time, also layer of iron phosphate formed on water content variation, so the highest 0.642 ± 0.28 mm/year on 0% water content. Fe2O3, Fe3O4, and FeOOH are the corrosion product by Bacillus megaterium. The highest biodegradation efficiency achieved by variation water content both 5% and 10% were 68.5% and 67.23%, and then followed by no water content at 60.40%.
A systematic literature study of regression test case prioritization approaches
Authors: Dahiya Omdev , Solanki Kamna
Published: November 2018

Regression testing is about running the entire test ensemble again to ensure that amendments do not negatively affect the system. A popular approach in regression testing is test case prioritization which reorders test cases in such a way that those with higher priorities are run earlier than those with lower priorities based on some criterion. Numerous researchers have worked on different aspects of prioritization approaches. This paper presents the result of the study conducted on different prioritization approaches showing mostly stressed areas by researchers and the areas where there is a future scope. For it, studies related to test case prioritization in regression testing from the year 2004 to 2018 are analyzed by dividing this time period into three slots of five years each. 36 studies were selected from 948 studies to answer the research questions framed for this study. The trends followed in TCP along with the approaches evolved are thus documented to find the current trends and future scope for the researchers to work upon.
SSVEP-based brain-computer interface for computer control application using SVM classifier
Authors: Sutjiadi Raymond , John Pattiasina Timothy , Lim Resmana
Published: November 2018

In this research, a Brain Computer Interface (BCI) based on Steady State Visually Evoked Potential (SSVEP) for computer control applications using Support Vector Machine (SVM) is presented. For many years, people have speculated that electroencephalographic activities or other electrophysiological measures of brain function might provide a new non-muscular channel that can be used for sending messages or commands to the external world. BCI is a fast-growing emergent technology in which researchers aim to build a direct channel between the human brain and the computer. BCI systems provide a new communication channel for disabled people. Among many different types of the BCI systems, the SSVEP based has attracted more attention due to its ease of use and signal processing. SSVEPs are usually detected from the occipital lobe of the brain when the subject is looking at a twinkling light source. In this paper, SVM is used to classify SSVEP based on electroencephalogram data with proper features. Based on the experiment utilizing a 14-channel Electroencephalography (EEG) device, 80 percent of accuracy can be reached by our SSVEP-based BCI system using Linear SVM Kernel as classification engine.
The choice of district road construction by the method of analytical hierarchy process and simple multi attribute rating technique
Authors: Widyaningsih Nunung , Purwoko Kusumo Bintoro Bambang , Purwoko Kusumo Bintoro Bambang , Hidayat Renggah Rahmat , Hidayat Renggah Rahmat
Published: November 2018

The choice of country road construction applying the method of Analytic Hierarchy Process and Simple Multi Attribute Rating Technique for the aim of the formulation and decision-making for the choice of road construction between flexible pavement and rigid pavement. The case study takes a road in the area of Poso, Center of Sulawesi, Indonesia. Data is taken by using a detailed questionnaire and distributed to respondents at random by 30 people. From the analysis of the obtained results are as follows as the selection of the path using the method of Analytic Hierarchy Process by weighting variables long-term durability and maintenance, the Simple Multi Attribute Rating Technique method by trading and cost benefit. Based on long-term durability, road construction should be resistant to weather is the first priority, and to resistant of traffic density and the road construction must be impervious to the ground shifting. Based on maintenance. The first priority is the path should be a period of excellent treatment and ease implemented of construction. Road construction to be used based on Analytic Hierarchy Process and Simple Multi Attribute Rating Technique is the flexible pavement. The weighting of the results seen from long-term durability and maintenance are obtained that the road asphalt has the highest weight value is 61.4% while the concrete path is 38.6%. The cost of the flexible pavement has a price of Rp. 365.788.000,-value benefit of/km is 61.40%, whereas for rigid path have a price amounting is Rp. 708.029.000,-value benefit of/km is 38.60%.
Information system planning strategy on higher education institution based computer: a case study of a STIKOM yos sudarso purwokerto Indonesia
Authors: Wibowo Adhi , Nugroho Ariadi , Marbun Padosroha , Chika Fransi Diandra
Published: November 2018

The study aims to describe planning strategies of information technology and information system on higher education based computer, especially College of Computer Science Yos Sudarso Purwokerto or “Sekolah Tinggi Ilmu Komputer Yos Sudarso Purwokerto” (STIKOM Yos Sudarso Purwokerto) Indonesia. The method was Enterprise Architecture Framework, in which each components of framework must utilities some analysis like SWOT analysis, IT Balanced Scorecard and Portfolio Application Framework. The result from Enterprise Architecture Framework documentation, can give a description to institution about development strategy of information system which is compatible with higher education institution vision and mission, as well as give input related to technology infrastructure condition and resource of institution. It is hoped that the blueprint can be implemented as a manual for developing institution.
Prediction of dyslexia using support vector machine in distributed environment
Authors: Prabha A Jothi , R Bhargavi , Ragala Ramesh
Published: November 2018

Dyslexia is a learning disorder characterized by lack of reading and /or writing skills, difficulty in rapid word naming and also poor in spelling. Dyslexic individuals have great difficulty to read and interpret words or letters. Research work is carried out to classify dyslexic from non-dyslexics by various approaches such as machine learning, image processing, understanding the brain behavior through psychology, studying the differences in anatomy of brain. In addition to it several assistive tools are developed to support dyslexics. In this work, brain images are used for screening individuals who have high risk to dyslexia. This work also motivates the application of machine learning in distributed environment. The proposed predictive model uses the machine-learning algorithm Support Vector Machine (SVM). The model is designed in Apache SPARK framework to support voluminous data. The prediction accuracy of 92.5% is achieved using SVM.
Video object extraction using optimized smoothed dirichlet process multi-view learning with improved adaptive modified Markova random field
Authors: S. Gowri G , P. Ponmuthuramalingam Dr.
Published: November 2018

Video object extraction (VOE) using segmentation from a video sequence is a very important task in editing and multimedia analysis for film making. Most of the VOE approaches required prior knowledge about background and foreground to extract target objects. In this paper, an Optimized smoothed Dirichlet Process Multi-view learning with improved adaptive Modified Markov Random Field which is enhanced by adaptive shape prior modified graph cut (OsDPMVL-IASMMRF) model has been extended for video-based object extraction. The contour tracking has been additionally included OsDPMVL-IASMMRF for VOE. The Teh–Chin algorithm has been used with OsDPMVL-IASMMRF for predicting the contour in the current frame by matching the extracted object contour from the previous segmented frame. The contour tracking propagates the shape of the target object, whereas the OsDPMVL-IASMMRF segmentation refined the object boundary and the shape for enhancing the accuracy of video segmentation. The experimental outcomes show that the proposed approach provides better segmentation results in terms of accuracy, precision and recall.
Factors impeding the industrialized building system (IBS) implementation of building construction in Malaysia
Authors: Md. Ali Massofia , Haslinda Abas Nor , Mohd Affandi Haryanti , Ain Abas Nor
Published: November 2018

In Malaysian construction industry, Industrialised Building System (IBS) has been introduced to replace the traditional construction method. While the government has been making significant efforts to encourage the IBS adoption, the uptake of IBS in Malaysia construction projects remains low. This study seeks to identify the barriers to the uptake of IBS and to propose the strategies to enhance the implementation IBS in Malaysian housing construction process from the perspectives of consultants. Interviews were conducted with five selected experienced individuals who were working with consultants (civil and structure engineer and quantity surveyor). The results revealed that, lack of knowledge and insufficient skilled workers are the main factors that impede the IBS uptake in Malaysia. Meanwhile, the most strategy proposed by the interviewees is to increase the facilities and incentives in order to expand research and development in IBS.
A review on deterministic and stochastic models for electrical treeing initiation and propagation in solid insulation systems from the perspective of prediction assessment techniques
Authors: H Balamurugan. , S Venkatesh.
Published: November 2018

Electrical treeing is a challenging prospect related to degradation mechanism in dielectrics that eventually leads to its breakdown. Treeing propagation depends on dielectric and electrode configuration thus leading to types such as branch, filamentary, bush etc. Though researchers have attempted a gamut of studies related to treeing, it is evident that appropriate choice of prognostic model is essential for prediction of ageing of insulation that emulate features such as dendrite length, channel width, space charge etc. Although studies related to treeing modeling have taken up depictions such as Diffusion Limited Aggregation, Field Limiting Space Charge etc. to obtain estimates of electric potential based on boundary value equations (Laplace and Poisson) utilizing tools such as Fractal Analysis, Cellular Automata etc., challenges such as space charge, inhomogeneity factor etc. continue to confront researchers. This research gives a detailed insight into a wide spectrum of studies related to treeing and ageing prediction assessment of insulation based on physical, electrical, numerical and analytical models developed thus far. This study also summarizes succinctly, the merits and limitations in each method and avenues for improvement. Finally, this research gives clues into important future opportunities related to methodologies for development pertaining to treeing prediction and ageing assessment.
A compact slot antenna with improved bandwidth and gain for wireless applications
Authors: Pant Aadya , Ch Swapna , Bharat Manish
Published: November 2018

A wide-slot antenna is investigated to achieve a bandwidth of about 162%. The ground plane includes a rectangular slot with dual SRR and two semicircular defects in the bottom side of the rectangular slot. A fork like feed-line with two parasitic stubs to increase the bandwidth is used to feed the slot. 37*37*0.8 mm3 is the size of the proposed antenna and the dielectric substrate used is FR4. The measured bandwidth ranges from 1.8-17.5 GHz which is approximately 162%. Significant improvement in gain for the frequency range of 1.8-6.1 GHz is observed. The proposed antenna has radiation patterns that are stable and omnidirectional in both E and H planes in all the six frequency points for entire frequency range. The simulated and measured results are in good agreement.