bluuebunny/crossref_metadata_2025 huggingface dataset:
Data-driven machine learning models for decoding speech categorization from evoked brain responses
Authors: Mahmud Md Sultan , Yeasin Mohammed , Bidelman Gavin M
Published: March 2021

Objective. Categorical perception (CP) of audio is critical to understand how the human brain perceives speech sounds despite widespread variability in acoustic properties. Here, we investigated the spatiotemporal characteristics of auditory neural activity that reflects CP for speech (i.e. differentiates phonetic prototypes from ambiguous speech sounds). Approach. We recorded 64-channel electroencephalograms as listeners rapidly classified vowel sounds along an acoustic-phonetic continuum. We used support vector machine classifiers and stability selection to determine when and where in the brain CP was best decoded across space and time via source-level analysis of the event-related potentials. Main results. We found that early (120 ms) whole-brain data decoded speech categories (i.e. prototypical vs. ambiguous tokens) with 95.16% accuracy (area under the curve 95.14%; F1-score 95.00%). Separate analyses on left hemisphere (LH) and right hemisphere (RH) responses showed that LH decoding was more accurate and earlier than RH (89.03% vs. 86.45% accuracy; 140 ms vs. 200 ms). Stability (feature) selection identified 13 regions of interest (ROIs) out of 68 brain regions [including auditory cortex, supramarginal gyrus, and inferior frontal gyrus (IFG)] that showed categorical representation during stimulus encoding (0–260 ms). In contrast, 15 ROIs (including fronto-parietal regions, IFG, motor cortex) were necessary to describe later decision stages (later 300–800 ms) of categorization but these areas were highly associated with the strength of listeners’ categorical hearing (i.e. slope of behavioral identification functions). Significance. Our data-driven multivariate models demonstrate that abstract categories emerge surprisingly early (∼120 ms) in the time course of speech processing and are dominated by engagement of a relatively compact fronto-temporal-parietal brain network.
Noise-assisted multivariate empirical mode decomposition based causal decomposition for brain-physiological network in bivariate and multiscale time series
Authors: Zhang Yi , Yang Qin , Zhang Lifu , Ran Yu , Wang Guan , Celler Branko , Su Steven , Xu Peng , Yao Dezhong
Published: March 2021

Objective. Noise-assisted multivariate empirical mode decomposition (NA-MEMD) based causal decomposition depicts a cause and effect relationship that is not based on the term of prediction, but rather on the phase dependence of time series. Here, we present the NA-MEMD based causal decomposition approach according to the covariation and power views traced to Hume and Kant: a priori cause-effect interaction is first acquired, and the presence of a candidate cause and of the effect is then computed from the sensory input somehow. Approach. Based on the definition of NA-MEMD based causal decomposition, we show such causal relation is a phase relation where the candidate causes are not merely followed by effects, but rather produce effects. Main results. The predominant methods used in neuroscience (Granger causality, empirical mode decomposition-based causal decomposition) are validated, showing the applicability of NA-MEMD based causal decomposition, particular to brain physiological processes in bivariate and multiscale time series. Significance. We point to the potential use in the causality inference analysis in a complex dynamic process.
Fast Axis Servo Diamond Turning of Complex Surfaces
Authors: Liang Jiancheng , Dai Yifan , Guan Chaoliang , Tie Guipeng , Xue Shuai , Du Chunyang
Published: March 2021

Optical components with complex surfaces are widely applied. Ultra-precision diamond turning technology can fabricate these complex surfaces efficiently and accurately. Fast axis servo (FAS) system has the characteristics of large stroke and high frequency response. In this paper, Fast axis servo system based on linear rolling guide rail was used to process the complex surface. By the speed/acceleration feedforward and the position PID feedback control algorithm, the precision motion control of the fast axis servo system in large stroke and high frequency was realized. According to the principle of fast axis servo machining, the tool path generating for FAS cutting and machining surface simulation were carried out. The Machining experiments of typical complex surfaces were tested and analyzed, the results show that this method can produce the expected complex surface shape and has preferable servo machining performance.
A Preliminary Survey of Language Learning In Digital Age: Higher Thinking Order Skills and Technology Used
Authors: Mansor Noor Rohana , Zakaria Rosdi , Rashid Roswati Abd. , Azmy Sharipah Nur Mursalina Syed , Ahmad Mazlina , Rahim Badruel Hairiel Abd. , Zakaria Ruslimi
Published: March 2021

Nowadays, language educators are continually investigating ways to offer a suitable learning environment, improve cognitive skills with the affordances of digital tools. Therefore, identifying the overview of the current trends and requirement needed in language learning is important toward improving the learner’s motivation. Based on Bloom’s Taxonomy, the cognitive level of language learning can be improved with certain learner’s consideration. However, the interconnected elements between higher-order thinking and learning tool in language material are known as an important component in language study, but, it is less discussed in the literature especially, in the Arabic Language. This paper presents a survey of recent achievements in offering attractive and effective learning environments for language learning. Based on our review, several research questions have been identified. We have also briefly discussed a few promising further research direction based on our literature survey.
Does social influence affect continuance intention to use e-campus? A Study in Malaysian private higher institution
Authors: Mohamad Zuraini Binti , Kamarozaman Zarina Binti , Kassim Mohd. Fazzly Rassis BinMd. , Razak Fahmi Zaidi Abdul
Published: March 2021

The advancement of IT innovation has facilitated teaching and learning in higher education institutions. However, little research has been carried out regarding the role of social influence in post adoption stage. In order to answer the research question, this research will examine the role of social influence in explaining continuance intention. Data were collected from 500 undergraduate and postgraduate students from private university in Kuantan Malaysia using a validated set of questionnaire. A simple linear regression has been carried out to answer the research question. The results indicate that social influence was positively related to the continuance intention. Implications from these results are further discussed
Identification of content quality perspective for continuance intention in e-campus application: Insights from Malaysia
Authors: Dzulkepli Norhafizatul Sheha binti , Razak Fahmi Zaidi Abdul
Published: March 2021

This study enhances the existing literature on post acceptance study by examining the role of IS success contruct in explaining user continuance intention in higher learning institution context. In this study, we investigate how content quality influences user continuance intention to use e-campus. Data was obtained from 500 undergraduate and post graduate students from private higher learning in Malaysia through paper-and-pencil self-administered questionnaire survey. The findings show content quality is positively affect user continuance intention to use e-campus. The findings also indicate that the variance explained in continuance intention was 21 percent. Practical implications for this study are discussed.
Service quality, satisfaction and users’ continuance intention to use e-campus: A mediation analysis
Authors: Razak Fahmi Zaidi Abdul , Mokhtar Ahmad Effat , Rahman Asmadi Abdul , Abidin Mohd Zawavi Zainal
Published: March 2021

The continued use of the information system would ensure the effectiveness of the implementation of a given program. Since the deployment of the system will cost a lot of funds, continuous use is not an option. However little is known about the role satisfaction as a mediator in the relationship between service quality and continuance intention. Accordingly, this research will identify a mediation role of satisfaction which in turn contribute to the adoption of the e-campus. Data were collected from 500 undergraduate and postgraduate students from private university in Kuantan Malaysia using a validated set of questionnaire. A bootstrapping procedure has been performed to examine the mediation hypothesis. The results indicate that satisfaction plays a significant role as a mediator of such relationship. Implications from this results are further discussed.
The impact of system quality on satisfaction to use learning management system: E-campus perspective
Authors: Rahim Roszalina bt. Abdul , Razak Fahmi Zaidi Abdul
Published: March 2021

The use of online learning applications is becoming increasingly popular in higher education institutions. However, it requires a considerable amount of investment and, if consumers do not make use of it, the investment would not benefit and would be considered a failure. In order to prevent such failure, this research will identify the factors that contribute to the user satisfaction on e-campus. Data were collected from 500 undergraduate and postgraduate students from private university in Kuantan Malaysia using a validated set of questionnaire. A series of regression statistics has been performed to answer the research question. The findings indicate that the system quality (β= 0.63, p < 0.01) was positively related to user satisfaction of using e-campus, which explains a total variance of 40%.
The role of trust on continuance intention to use e-campus
Authors: Razak Fahmi Zaidi Abdul , Mokhtar Ahmad Effat b. , Rahman Asmadi Abdul , Abidin Mohd Zawavi Zainal
Published: March 2021

A sample of 315 subjects completed a questionnaire assessing trust towards continuance intentions. The objective of the present study was to determine the role of trust in predicting continuance intention to use e-campus. The study described in this paper used quantitative and survey research method. Data was analysed using simple linear regression analysis. The results indicate that trust were positively related to continuance intention explaining a total of 22% variance.
Understanding the effects of system quality on continuance intention to use student’s information system management: An empirical evidence from Malaysia
Authors: Sabarudin Aswahida Binti , Razak Fahmi Zaidi Abdul
Published: March 2021

This paper examines the role of system quality on continuance intention to use e-campus. The scale used in this study is adapted from previously validated instrument derive from the relevant literature. using a paper-and-pencil self-administered questionnaire survey, data was collected from 315 undergraduate and post graduate students from private higher learning institution in East Coast Malaysia. The results suggest that users’ continuance intention to use e-campus is determined by system quality. Implications for research and practice are discussed.
Measuring the impact of technical proficiency on continuance intention to use e-campus: Empirical study from Malaysia
Authors: Razak Fahmi Zaidi Abdul , Rahman Asmadi Abdul , Mokhtar Ahmad Effat b.
Published: March 2021

Inadequate use of technology has been the subject of IS scholars starting back with ECM (expectation-confirmation model) by [1]. This paper explores the effect of technical proficiency on continuance intention to use e-campus. Data were collected from 500 undergraduate and postgraduate students from private university in Kuantan Malaysia using a validated set of questionnaire. Simple linear regression statistics has been performed to answer the research question. The results suggest that user continuance intention is determined by their technical proficiency explaining a total variance of 24 per cent. Implications from this results are further discussed.
Factors influence the housing price in Kuala Lumpur by using AHP
Authors: Yeee Gan Fui , Sufahani Suliadi Firdaus , Wahab Mohd Helmy Abd , Idrus Syed Zulkarnain Syed
Published: March 2021

The housing affordability issue was bothered the B40 and M40 buyers where the income level of the buyers cannot afford the higher housing price in Kuala Lumpur. To understand the factors that contribute to the housing price can improve the planning for the buyers. The planning for purchasing the residential property should be construct by the buyers to analyze the financial ability. Analytical Hierarchical Process can show the hierarchical diagram for the factors interested which have the higher priority is define as the important factor towards the housing price.
Gain More Insight from Common Latent Factor in Structural Equation Modeling
Authors: Afthanorhan Asyraf , Awang Zainudin , Majid Norliana Abd , Foziah Hazimi , Ismail Izzat , Halbusi Hussam Al , Tehseen Shehnaz
Published: March 2021

There is a great deal of evidence that method bias is really sure influences item validities, measurement error, correlation and covariance between latent constructs and thus leading the researchers to erroneous conclusion due to inflation or deflation during hypothesis testing. To remedy this, the study provides a guideline to minimize the method bias in the context of structural equation modeling employing the covariance method (CB-SEM) using medical tourism model. A practical approach is illustrated for the identification of method bias based on the new construct namely common latent factor. Using this latent construct, we managed to identify which item has potential to permeate more variance from common latent factor. Nevertheless, we figure out that the method bias is do not exist in our developed model. Therefore, this measurement model is appropriate for structural model in order to achieve the research hypotheses. We hope that this discussion will help the researchers anticipate which items are likely exposed on method bias before proceed to advance modeling.
Use of Computer Technology in the Internet Using the Youtube in Teaching and Learning Student Basic Technique Dances Contemporary University of Malaysia Terengganu
Authors: Musa Azlina , Hashim Mohd Nasir , Ain Chua Abdullah Nurul , Musa Rabiu Mu’azu
Published: March 2021

This article will discuss the use of computers in internet access through the use of you tube in learning and teaching beginners the techniques of contemporary dances moves. In this regard, the application of internet usage is so widespread around the world that it has the potential to help the student learning process. Besides being able to stimulate students learning interest in learning and mastering basic techniques of body movement and learning as a beginner of dance moves. Besides, how to control the internet access like you tube is limited just to help students learn. In addition, using the internet as one of teaching tools in the classroom and learning the basic techniques of dance movement can help attract students with background in different programs of study taking dance classes in the classroom learning process. In addition, researching the effectiveness of implementing internet teaching applications has the potential to enhance the learning skills of students who attend dance classes. In addition researching the extent to which the internet can interest students in learning. In addition, research on the frequency of students use of computers from internet access includes you tube, cd rom, video during dance class learning. The design of the research is based on observations and questionnaires with a sample of twenty students who have taken basic dance classes at the University of Malaysia Terengganu. In addition, researching dance can create physical intelligence and improve student mindset. The questionnaire was used to measure the frequency of internet use in teaching basic dance techniques among students and to student’s interest in learning dance. Data collection was conducted on twenty students attending dance classes at University Malaysia of Terengganu. This data collection is done using a questionnaire that covers various items on the application of teaching you tube, cd rom, video in developing basic skills of dance technique in beginner to basic learning in dance class. Re-documenting this study could add further sources of reference to other researchers in the future.
Carbon Footprint Assessment of Hostel Building Construction Using the Industrialized Building System In Pauh Putra, Perlis
Authors: Ayob Afizah , Razali Norashikin , Hassan Zulkarnain , Rahim Mustaqqim Abdul , Zahid Mohd Zulham Affandi bin Mohd
Published: March 2021

This study performs a carbon footprint (CF) assessment in carbon dioxide equivalent tons (tCO2eq) for hostel building construction in Perlis, Malaysia, through a case study by using the Industrialized Building System construction method. Life cycle assessment from cradle-to-gate is conducted to calculate the CF produced by manufacturing prefabricated sandwich panels (Prefab-SP) for machinery operation and their actual site installation stages. Results show that the actual site installation of Prefab-SP component requires the extensive use of an excavator leaves a significantly high CF of 81.59 tCO2eq (34.00%), especially during the completion of floor construction. Building work contributes a notable CF of 159.32 tCO2eq (63.87%), followed by preliminary work, foundation, and earthwork with 35.08 (14.06%), 34.30 (13.75%), and 20.76 (14.06%) tCO2eq, respectively. The shortcrete mixture used for plastering works releases a high CF of 360.04 tCO2eq (73.11%) due to its high cement consumption and high embodied energy factor of extraction and production. Given the magnitude of the CF spike from the construction phase, its implications are expected to elicit the attention of policymakers in setting sustainability reduction targets for construction phases.
Comparative Analysis of Software Testing Techniques for Mobile Applications
Authors: AbuSalim Samah W.G. , Ibrahim Rosziati , Wahab Jahari Abdul
Published: March 2021

Software testing is the investigation process required to give sufficient information about the quality of the program and its conformity with the specifications that have been identified by the customer and to find problems and errors before they are discovered when the system or program is run by the user. It has an important role in software engineering, which is essential to Software Quality Assurance (SQA). Due to increasing numbers of mobile applications users, testing of mobile application is an essential phase in developing any application to ensure that software has zero defects. For that, many software testing techniques and tools are developed, each having its own features to test software. This paper describes and gives general overview of different strategies of software testing techniques that commonly used for detecting errors in mobile applications, which are: White box testing, Black box testing, Gray box testing, Mutation testing, Regression testing and Fuzzy testing. The primary goal of this paper is to emerge the effective technique of the mobile application testing. As a result of the research, most of testing techniques are currently used in mobile testing include Mutation, Regression and Fuzzy testing. The White box testing and Black box testing techniques are rarely used. Also, the latest research into mobile application testing focuses on GUI testing of mobile applications.
Comparison Analysis on the Performance of the Filtered Photovoltaic (PV) Module
Authors: Misran Mohd Fakhrur Razi , Zainun Wan Hairilamei Nik Wan , Wahab Mohd Nor Hakim Ab.
Published: March 2021

The photovoltaic system is the most significant conversion device for solar energy compared to other available systems. It converts solar radiation into electricity, but the performance of the PV module degrades as the PV temperature increases. This is because only selected bands of wavelength, 0.35 to 0.82 μm, are converted into electricity while the remaining solar radiation will generate heat in the PV system. In order to maintain PV performance, the operating PV temperature can be maintained by applying various cooling methods, which are either passive or active. Some wavelengths, such as UV and Infrared, need to be eliminated. Therefore, this research aims to investigate the effects related to the presence of water in the filtered PV module. At the end of this study, the performance of the PV with and without the water filter was compared, and the results show that the PV module with the water filter achieved a higher efficiency of 9.96% compared to the filtered PV module without water, which had an efficiency of 9.61%.
Effect of High Doses Gamma Irradiation on Texturing of Bi2Sr2CaCu2O8 (Bi-2212) Superconductor
Authors: Hamid Nasri A. , Mohiju Zaahidah Atiqah , Senduradesigen P.
Published: March 2021

The effect of high doses gamma irradiation on the texture and microstructure of Bi2Sr2CaCu2O8 (Bi-2212) superconductor is studied in order to observe the sustainability of the material in radiation environment such as gamma radiation. The prepared samples have been irradiated with 100 kGray (kGy) of gamma irradiation and investigated by powder X-ray diffraction (XRD) and scanning electron microsopy (SEM). The Texture Coefficient (TC) for both the non-irradiated and irradiated samples has been calculated. The XRD patterns of the samples showed the Bi-2212 phase as the dominant phase. However, reduction in the intensity of Bi-2212 phase is observed in the gamma irradiated sample. Furthermore the calculated TC percentage of the irradiated sample have lower values when compared to the non-irradiated sample. The SEM micrograph of the irradiated sample showed random grains orientation with poorly connected inter and intra-grain microstructure that are in agreement with the calculated TC percentage.
Ionic liquid modified PEEK-MWCNTs nanocomposites with enhanced thermomechanical properties
Authors: Ahmad Aqeel , Mahmood Hamayoun , Mansor Nurlidia , Iqbal Tanveer , Moniruzzaman Muhammad
Published: March 2021

Polyetheretherketone (PEEK) is a stable semi-crystalline thermoplastic polymer with excellent thermal and chemical properties and is used in many applications, especially as a biomaterial. However, poor mechanical properties: mismatching of elastic modulus to human bone retards the use of PEEK as a biomaterial for bone implant material. In the present study, ionic liquid (IL) modified multiwalled carbon nanotubes were used to prepare PEEK nanocomposites via internal mixer and compression molding processes. The morphologies, thermal and mechanical properties of the prepared nanocomposites were evaluated. Uniform and excellent distribution of MWCNTs into PEEK was achieved by optical microscopy. The thermogravimetric study showed that the decomposition temperature of the composites was boosted 7 % ± 0.9 as compared to those of PEEK composites prepared without IL. Moreover, the elastic modulus of the PEEK nanocomposites was improved by ionic liquid modified MWCNTs into the PEEK. Thus, the prepared PEEK nanocomposites have the potential to be used for fabricating bone implants.
Synthesis and determination of Surface tension of 1-butyl-3-methylimidazolium lauroyl sarcosinate IL and Tween 80
Authors: Nazar Masooma , Shah Mansoor ul Hassan , Goto Masahiro , Yahya Wan Zaireen Nisa , Moniruzzaman Muhammad
Published: March 2021

Ionic liquids (ILs) have unique physicochemical properties. ILs with long carbon chains are called surface-active ILs, and they have surfactant properties. In this study, we synthesize (1-butyl-3-methylimidazolium lauroyl sarcosinate) [BMIM] [Lausar] IL that have surfactant properties. Nuclear magnetic resonance spectroscopy (NMR) was used to confirm the chemical structure of the synthesized IL. The surface tension of [BMIM] [Lausar] was determined that it was almost 37.1mN/m. Tween 80 is the most famous commercial surfactant, and we also determine the surface tension of Tween 80. Afterword, we make the binary mixture of Tween 80 and IL-based surfactants. Based on our results, we can conclude that Tween 80 and [BMIM] [Lausar] both reduced surface tension and have excellent surface properties when combining and can be used as surfactants in many sectors.
Experimental Analysis for the Influence of Ignition Time on Combustion Characteristics of a Free Piston Engine Linear Generator
Authors: Raheem Ahmed T. , A Aziz A Rashid , Zulkifli Saiful A , Ayandotun Wasiu B , Zainal Ezrann Z , Elfakki Salah M
Published: March 2021

Free Piston Engine Linear Generator (FPELG) is a modern engine and promising power generation engine. It has many advantages compared to conventional engines such as less friction, few numbers of parts, and high thermal efficiency. The cycle-to-cycle variation one of the big challenges of the FPELG because it is influence on the stability and output power of the engine. Therefore, in this study, the effect of ignition time on combustion characteristics is investigated. The single-cylinder FPELG with spark ignition (SI) combustion type by using compressed natural gas (CNG) fuel type was set to run. LabVIEW is used to run the engine and control of input parameters. All experimental data have been collected and processed based on LabVIEW and Macro tool. The analysis results of the experimental based on ignition time show that the in-cylinder pressure with double peak shape was produced when the ignition delay after Top Dead Centre (TDC). On the other hand, the in-cylinder pressure and output power with ignition before TDC is higher in approximately (33.8%, and 17.8% respectively) compared to the in-cylinder pressure with ignition after TDC. Though investigate the influence of ignition time on the combustion characteristics but with further study and investigation for such as the combustion during expansion, exhaust gas temperature, and emission under various ignition time could be achieved in our future work.
Evaluation of the Impact of Short-Term Aging on Volumetric and Marshall Properties of Palm Oil Clinker Fine Modified Asphalt Concrete (POCF-MAC)
Authors: Yaro N S A , Napiah M , Sutanto M H , Usman A , Rafindadi A D , Saeed S M , Abdulrahman S
Published: March 2021

Disposal of palm oil mill waste material has become a significant factor impacting the environmental situation. Among the palm-oil waste the Palm Oil clinker (POC) is usually discarded in the landfill with no economic use. The use of waste materials as modifiers for bitumen mixtures is one of the better alternatives. For this study, the impact of short-term aging on Palm oil clinker fine (POCF) modified asphaltic mixtures was investigated. The POC chunks were initially grounded and sieved through the British standard (BS) 0.075 mm sieve to obtain the POCF that can be utilized as a bitumen modifier at 4%, 6%, and 8% by weight of bitumen. In this investigation, 4.9% optimum bitumen content was selected with a 60/70 penetration grade bitumen to investigates the properties of the POCF on the ACW 14 modified asphalt mixture before and after aging. The study implemented a laboratory simulation of short-time aging (S-TA). Volumetric and Marshall properties were evaluated and analysed to compare the unaged and aged samples. Furthermore, the regression model validates significantly (R2 value 0.89-0.99) that variation in the aging condition and POCF content is directly related to the variation in the Marshall and volumetric properties. The investigation shows that the aging condition and POCF content had a significant effect on voids, Marshall stability, and Marshall quotient, as the S-TA sample showed better results compared to unaged this finding was also verified by ANOVA analysis. The research finding indicates that mixtures with POCF-MB have better performance as compared to conventional mix even under S-TA.
The Novel Coronavirus Causes Impairment of Blood Vessels and Respiratory System with Head-to-Toe Symptoms and Vaccine Development: An Overview
Authors: Abd-Alhameed R. , Jamil M.M. Abdul , Ibrahim T.N.T , Qahwaji R. , Rasheed M.E.H. , Youseffi M.
Published: March 2021

Blood clotting was reported in April 2020 [1] as another serious symptom due to COVID-19, but also came other reports such as young adults dying due to strokes and heart attacks [2]. The currently known head-to-toe symptoms of COVID-19, seem to indicate vascular as well as respiratory diseases and that 40% of related death are due to cardiovascular complications [2]. In a recently published journal paper in Lancet [3], the authors found that SARS-CoV-2 virus can infect the endothelial cells that line the inside of blood vessels noting that endothelial cells protect the cardiovascular system and release proteins that influence everything from blood clotting to the immune response. In the same paper, the authors showed damage to endothelial cells in the lungs, heart, kidneys, liver, and intestines in patients with Covid-19. Therefore, the emerging belief is that the novel coronavirus is a respiratory illness to begin with, but as it spreads further into blood vessels it becomes a vascular illness that is capable of killing patients via vascular system.
Profiling and Relationship between Sprint Time and Cardiovascular Fitness during In-Season’s Training among Professional Soccer Players
Authors: Madarsa Nor Ikhmar , Mohamad Nur Ikhwan , Malek Nor Fazila Abd , Chinnasee Chamnan , Md Nadzalan Ali
Published: March 2021

The purpose of this study was to examine the sprint time and cardiovascular fitness among professional soccer players during in-season’s training sessions. Thirty participants who officially registered as Perbadanan Kemajuan Negeri Perak Football (PKNP) Club professional soccer players participated in this study. Data were collected during actual in-season training sessions from December 2016 to April 2017. Sprint time performance was determined by the 20m sprint test and 20m Yoyo Intermittent Recovery Test Level 1 was used to determine the cardiovascular fitness level of the players. Repeated Measures and Pearson Correlation Coefficient was used to analyzed the data, there was significant improvement (p<0.05) for sprinting performance from pre-test (3.59 ± 0.36 sec) to post-test (3.20 ± 0.14 sec). There was also a significant improvement for cardiovascular performance from pre-test (68.65 ± 3.88 mhkg-1·min-1) to post-test (75.40 ± 5.45 mhkg-1·min-1) throughout the four months of training periods. There was a significant relationship (p<0.05) between sprint time performance and cardiovascular fitness performance for all six series testing. Thus, it can be concluded that throughout the process of monitoring, the player’s performance can be identified, as showed in this study there was an improvement on sprinting performance and cardiovascular fitness performance throughout six series testing, which mean players undergone relevant training program during the in-season training session.
Spotted hyena optimizer for well-profile energy optimization
Authors: Biswas Kallol , Rahman Md Tauhidur , Negash Berihun Mamo , Askary Md Abu Hasan Al , Hai Tasmia Binte , Kabir Shihab Shahriar
Published: March 2021

In recent years, directional drilling becomes more popular in petroleum industry due to its more exposure to reservoir. During wellbore trajectory design for directional drilling, more importance should be given on safety issues. Well-profile energy is the key parameter which can assure a safe and efficient wellbore trajectory through proper optimization. In this work, the Spotted Hyena Optimizer (SHO) is proposed and implemented for optimizing the well-profile energy and compared with another state of art method named Particle Swarm Optimization (PSO) algorithm. The trajectory is mathematically formulated by using radius curvature method (RCM) considering 17 variables on which well-profile energy is depended. The SHO successfully obtained the optimum values of the 17 design variables which eventually given the minimum well-profile energy. The optimum well-profile energy obtained by SHO is 207.00 which is 18.28% better than PSO. Additionally, the sensitivity of the algorithm has been analysed by changing different operational parameter of SHO. It is observed that the efficiency of SHO increased with the increment in the number of search agents (hyenas). The minimum well-profile energy achieved through SHO ensure a less complex and safe wellbore trajectory.
Static Bending Performance of Mengkulang and Kasai LVL Beam in Structural Size
Authors: Kim Tan Khai , Noh Nur Ilya Farhana Md , Bhkari Norshariza Md , Ahmad Zakiah , Chen Lum Wei , Harun Mohd Shafee , Lin Ng Jing
Published: March 2021

The scarcity of good quality timber initiates the timber industry shift to engineered timber products. Laminated veneer lumber (LVL) promising high strength and more dimensionally stable as well as flexible compared to conventional timber components. However, most of the previous studies focus on softwood timber, and limited species utilized tropical timber. Thus, this study assessed the static bending performance of LVL produced from Malaysian tropical hardwoods, namely Mengkulang (Heritiera spp.) and Kasai (Pometia spp.) in structural size. A four-point bending test was conducted in accordance with BS EN 408:2010+A1:2012. The effect of loading direction in edgewise to the bending test sample are performed and evaluated in parallel and perpendicular to the timber grain. In this study, Kasai samples displayed higher bending strength in MOR and MOE values than Mengkulang samples. By grain directions, samples with grain parallel to span performed better in MOR and MOE values as compared to the perpendicular grain samples for both timber species.
Effect of organic and nitrogen loading rate in a rotating biological contactor for wastewater treatment
Authors: Waqas Sharjeel , Bilad Muhammad Roil , Man Zakaria B
Published: March 2021

A laboratory scale rotating biological contactor (RBC) bioreactor was evaluated for the synthetic municipal wastewater treatment. The decentralized RBC potential advantage of relatively simple design, low HRT and aeration requirement, high loading capacity and relatively high nitrogen removal. An increase in loading rates resulted in enhanced removal rates and decreased removal efficiency for both organics and nitrogen. The bioreactor was operated under loading conditions of 9.6-28.7 g COD/m2.d and 0.085-0.255 g N/m2.d resulted in 48.0-76.9% and 33.0-45% removal efficiency for organics and nitrogen, respectively. The average removal efficiency in terms of chemical oxygen demand, total nitrogen, ammonia and turbidity was 72.4±2.5 mg/L, 38.3±1.9 mg/L, 95.6±0.8 mg/L, and 78.9±0.3 NTU, respectively. Moreover, an energy consumption analysis RBC shows that it consumes significantly less energy compared to other biological processes. Overall results exhibit the effectiveness of the RBC to obtain superior biological performance thus significantly enhances environmental sustainability.
Malay SMS Spam Detection Tool Using Keyword Filtering Technique
Authors: Hanif Ellya Izatty , Foozy Cik Feresa Mohd , Hamid Isredza Rahmi A. , Mohamed Rozlini , Yusof Munirah Mohd , Aziz Ruhaya Ab. , Shamala Palaniappan
Published: March 2021

Message Service (SMS) Spam is one form of mobile device attack that can affect mobile user’s security and privacy. This study developed a Malay SMS Spam detection framework specifically for Malay language. The paper discusses about the spam word detection using keywords filtering technique and security question to enable authorized user reset password when forgot the password. The development of the detection tool is done using the Object Oriented Methodology (OOM). There are four phases in OOM which is Requirement Phase, Analysis Phase, Design Phase and Coding Phase. This detection tool is then further analyzed to evaluate the functionality. This project also compares the existing tool to know the lack of current existing tool. Most of the existing spam tools are capable of identifying English text-based messages but there are close to none to filter the Malay language text-based SMS spam. It is expected that the developed tool is able to detect the SMS spam by using keywords filtering technique in Malay language.
Graphical Password Authentication For Child Personal Storage Application
Authors: Yang Tay Yi , Shamala Palaniappan , Chinniah Muruga , Mohd Foozy Cik Feresa
Published: March 2021

Mobile applications are very popular among the children nowadays as children use it for many purposes such as entertainment, learning or education. Keeping hand written notes in hard copy is not a good choice as the accumulated papers would mess up child’s study space. Although there is high adoption of mobile application among children nowadays, but children are not educated to practice password to secure their personals in their primary school syllabus. Therefore, an application which can provide personal storage for children to store their notes in softcopy forms called Graphical Password Authentication for Child Personal Storage Application was proposed. The adoption of graphical password authentication in the proposed system is intended to cultivate children practice password to secure their files in an interesting method. The proposed system is developed in Android mobile application platform and the Object-oriented Mobile Application Development is applied as methodology of the project. The proposed system’s functional requirements are implemented according to user’s requirements and the application interfaces implementation also based on user’s characteristics that has been studied in literature reviews. The significance of the project is awareness on secure file keeping among the children. Children can use graphical password in their childhood age would be the advantage for them in the future because they would make a sense to protect privacy by setting up password. In terms of information security, the proposed system has mentioned some values that would be achieved which are authentication, confidentiality and availability.
Design of MIMO F-OFDM System Model for PAPR Reduction in the Growth of 5G Network
Authors: Noorazlina M.S , Sulong S.M. , Said M.Shahrizan M. , Ahmad I. , Idris A.
Published: March 2021

A compact 5G technology can be defined as a system which consist of high signal data transmission, maximizing frequency diversity and can combat noise interference. By theory, it is significantly to improve system’s performance in order to obtain better voice quality, tolerance to noise interference, excellent spectral efficiency, higher network capacity, low latency and frequency selective fading in multipath environment, which is robust to the channel impairments. 5G network uses multipath environment or multiple transmissions technique, which known as multiple input multiple output, (MIMO). MIMO operates with multiple antennas technology, which includes the multiple transmitters with receivers’ circuits to minimize errors and optimize data speed. For the transmission efficiency, multiple antenna system model is commonly put together with digital data encoding method called Orthogonal Frequency Division Multiplexer (OFDM), where the carrier signals have high spectral efficiency and immunity to frequency fading. MIMO-OFDM configuration has introduced to increase the diversity gain and improve the system capacity. Currently, filtering is implemented to overcome out-of-band radiation for the spectrum efficiency and meet the diversified expectation for the growth of 5G network. The main drawback in MIMO F-OFDM system is its high peak-to-average-power-ratio (PAPR). This paper discusses the parameter specification in reducing PAPR in MIMO F-OFDM system. The proposed parameters are utilizing block coding technique that is Enhancement Asymmetric Arithmetic Coding (EAAC), together with numbers of antenna configuration to overcome the problem of high PAPR. From the simulation results, the PAPR reduced at 6.85% using block coding technique and MIMO antenna configuration and it is verified with the existing system with MIMO-OFDM. Overall, the communication system model will lead to the mutual harmonization among society with new parameters of MIMO F-OFDM and block coding technique.
Effect Of Pressure On Density, Porosity And Flexural Strength During Cold Isostatic Press Of Alumina-Ysz-Chromia Cutting Tool
Authors: Norfauzi T. , Hadzley A.B. , Azlan U.A.A. , Azhar A.A. , Noorazizi S.
Published: March 2021

This study presented the effect of pressure on the density, porosity and flexural strength when cold isostatic press (CIP) was applied to compact the ceramic powders in the form of insert cutting tools. Specific composition of alumina (Al2O3) wt.90%, yittria stabilized zirconia (YSZ) wt.10%, chromium oxide(Cr2O3) wt.0.6% and polyethylene glycol (PEG) wt.0.6% were ball milled and hand pressed to form green body of ceramic inserts. These green body were undergone further compaction inside CIP with pressures variation of 200 MPa, 300 MPa, 400 MPa with 30 seconds and 60 seconds pressuring time. The ceramic composts were then sintered at 1440°C for 9 hours before being assessed with density, porosity, Rockwell hardness (HRC) and bending test. The results show that CIP use with 300 MPa parameters with 60 seconds shows the best mechanical properties with relative density 95.5%, porosity 4.5% and HRC 65.5 hardness. Further assessment of microstructure revealed that the particles size distributed evenly along fracture surface with coarse grain and porosity dominant in the certain area.
Non-Conformance Time As The Component Of Time Loss Measures In Assembly Processes
Authors: Rasib A.H.A. , Abdullah R. , Parnon M.A.A. , Abdullah Z. , Mansoor H. O.
Published: March 2021

Hidden Time Loss (HTL) occurs along the production processes that have a big implication on productivity. Overall Equipment Efficiency (OEE) is one of the most popular performance measurement tool used in the production line. The HTL has been provided by quality as one of the measure components of OEE. However, OEE doesn’t really suitable in measuring operation performance of assembly processes mainly in the semi-auto assembly and the manual assembly processes. There would be the amount of HTL have occurred along the semi-auto assembly and manual assembly processes that become crucial when to achieve high product variety at the same production assembly line. Therefore, the purpose of this paper is to introduce the Non-conformance Time (NCT) as one of the part of Hidden Time Loss Measures (HTLM) in assembly processes. Literature study on manufacturing assembly processes had been used to derive the structure of NCT. Then, two selected automotive manufacturing companies had been used as a case studies in order to validate the NCT structure. Based on semi-auto and manual assembly processes, the results show that the NCT is one of the parts of HTLM.
Experimental study on human physiology during repetitive workload simulated under high temperature and high relative humidity
Authors: Ismail Ahmad Rasdan , Jusoh Norfadzilah , Makhtar Nor Kamilah , Zein Raemy Md , Rahman Ismail Abdul , Abdull Wahab Shaik Farid , Othman Rohayu
Published: March 2021

Repetitive workload may cause fatigue and contributed to most cases of workplace related ergonomics injuries in the industries. The purpose of this study is to investigate the physiological responses induced by the repetitive lifting activities based on in the Malaysia construction workers being exposed under high heat and the relative humidity. To achieve the objectives, three male workers participated in this experiments. There were repeated experimental based on the Design of Experiments procedure simulated under environmental temperature (32°C and 25°C) and repetitive lifting task (15 min). The physiological responses measured where the heart rate (HR) and maximum oxygen consumption (VO2max). The experiments were conducted in a thermal climate simulation chamber and the parameters were set-up based on the real working environment. The results showed that the subjects highly experiencing fatigue when they were exposed to high temperature at 32°C. These phenomena were determined through their HR and VO2max, which were increased gradually under prolonged environment exposure. This study found that the significant heat stress increased the workload intensity in repetitive lifting tasks significantly correlated with the physiological responses of the subjects represented through the HR and VO2max. The study concluded the need of management to reconsider the impact of work environmental temperature and relative humidity to their workers especially to those work under tropical climate.
Research on Forecast of Gasoline Octane Loss Based on Neural Network
Authors: Zhang Zele
Published: March 2021

Low-sulfur gasoline has become the world’s fuel development trend. However, the existing technology generally reduces the gasoline octane number in the process of desulfurization and olefin reduction of FCC gasoline. How to predict the octane loss of gasoline is very important for subsequent related research. This paper analyzes and screens the refinery data of chemical plants, builds a neural network-based gasoline octane loss prediction model, inputs 12 main operating variables to predict the octane loss, and verifies it with real data. The results show that the training effect of the model is good, and the training error is within 1%, which provides a reference for the research on predicting the loss of gasoline octane number.
The Anti-Harmonic Ability and Power Quality Improvement of Smart Grids
Authors: Wu Junqi
Published: March 2021

The purpose of this paper is to evaluate the influence of harmonic interference on power transmission in photovoltaic power plants, and to add harmonic filters in the transmission process to maintain the operating standard of the distribution system. Finally, the technology status of smart grid and its influence on power quality are discussed.
Research on Wireless Sensor Network System Based on Zigbee Technology for Short Distance Transmission
Authors: Zhao Yong
Published: March 2021

Based on ZigBee technology and the development of ARM technology and the demand of the wireless data transmission system, this paper proposes a wireless sensor network based on ZigBee and ARM design scheme of system mainly include ZigBee node and ZigBee base stations, using MSP430F149 framework and CC2420 ZigBee nodes, with embedded ARM7 chip STR710FZ2T6 framework and CC2420 ZigBee base station node, a hardware platform of low power consumption, low cost, and USES the partial mesh topology, Z-Stack protocol Stack Development of software and on-demand routing algorithms, embedded Tiny OS system, ZigBee-based wireless data transmission system. At the same time, aiming at the wireless sensor network (WSN) in the process of clustering nodes distribution imbalance problem affecting the service life of the network, an improved particle swarm (IPSO) algorithm combined the technology of distributed spatial analysis (DSA) of wireless sensor network equilibrium density clustering method, in order to promote the network equilibrium distribution of energy consumption, avoid the working life of the hot issues and maximize the sensor network. The experimental results show that the proposed method is effective for energy balance clustering of network nodes, and has lower power consumption than other clustering techniques, so the network life is longer. Peer-to-peer communication can be realized between point to multi-point and two points, automatic configuration and automatic recovery of fast networking, and data communication can be realized through coordination between nodes.