Displaying publications 41 - 60 of 88 in total

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  1. Noor Azlinda Ahmad, Zawani Amirah Rasid, Zuraimy Adzis
    MyJurnal
    Lightning is among the most deadly natural phenomena to mankind. This phenomenon
    is seen to increase globally as well as in Malaysia. Lightning does strike open areas
    such as playing fields and playgrounds and these areas are places people gather.
    Sensors that can detect the early occurrence of lightning have been developed for
    detecting approaching lightning activity in this project. The main objective is to provide
    early lightning warning system to the public and hence to reduce the number of
    fatalities due to lightning strike. The warning circuit was designed and simulated using
    Multism11. Basic operational method of the circuit is based on the comparative
    voltage method using LM339N integrated circuit comparator (IC). Light Emitting Diodes
    (LEDs) were used as indicators to indicate if the incoming voltage level is higher or
    lower than that of the safety level.
  2. Bilkisu Maijama'a, Engku Muhammad Nazri Engku Abu Bakar
    MyJurnal
    For the past few years, government-funded universities in Malaysia faced an uphill
    battle to strategize their management budget due to significant budget cut by the
    Malaysian Government. One portion of the budget will be spent towards achieving the
    key performance indicators (KPIs) set by the universities to achieve their annual
    targets. Unfortunately, some universities set up their specific strategies to achieve the
    KPIs without ample consideration to the limited available resources where less
    attention is channeled to the cost of achieving the KPIs. Setting priorities and making
    decisions on allocation and reallocation of resources based on the direction of the
    strategies must be executed with transparency and accountability and will be of great
    importance. In this paper we illustrate how integer programming was applied to
    allocate budget based on the KPIs set for one of the government-funded Malaysian
    universities’ (U-XYZ’s) research and publication agenda. Two models were developed
    and successfully solved. The first model was to determine the total budget needed if
    all the KPIs were to be achieved while the second model was to distribute the allocated
    budget set by U-XYZ, for all the activities planned for the agenda. The result showed
    that in order to achieve the target, U-XYZ has to increase its budget allocation by
    RM2.164 million. Otherwise, U-XYZ can only expect to obtain 1.578 out of 1.593 points
    that is required to be achieved.
  3. Brintha Ganapathy, Yieng, Ying Choi, Norahim Ibrahim
    MyJurnal
    Microbial Fuel Cell (MFC) is a device that generates electricity from the metabolism of
    bacteria simultaneously treats wastewater by decolourizing the azo dye in wastewater.
    In this work, the effect of different external loads and bacterial loads were examined.
    The maximum open circuit voltage generated was 390 mV by using 7 consortia of
    bacteria while the maximum current generated was 50 µA using 10 Ω resistor. 97%
    decolourization efficiency of 0.1 g/L of azo dye was achieved after 5 days of operation.
    Besides, the maximum current density and power density achieved were 17.9 µA/cm2
    and 460 µW/cm2
    respectively. Polarization curve was plotted and Scanning Electron
    Microscope was applied to visualize the bacterial community attachment onto the
    graphite felt electrode. Cyclic voltammetry was applied to study the redox properties
    of the Azo dye using microorganisms in MFC. Overall, these 7 bacterial strains used in
    this work showed the capability in decolourizing the Azo dye simultaneously producing
    electricity in MFC.
  4. Firdaus Abd Latib, Haziq Zul Asyraf Zahari, Abdul Rahim Abdul Hamid, Kevin Chester Wong How Yee
    MyJurnal
    The probability of the construction accident to happen is high due the nature of
    Construction work that involves complex activities, methods, machineries, materials
    and hazards. The occupational safety and health (OSH) law and regulations are
    mandatory for every construction project to uphold. Responsibilities to ensure the
    safety and health at the workplace lies with those who create the risk and with those
    who work with the risk. The owner or client of the construction project has the upper
    hand in determining the standard of OSH implementation in their project through
    contract documents. If the contract documents comprehensively spell out OSH
    requirements and cover all OSH cost, then the issues of contractor not implementing
    OSH measures could be minimized. The objective of this study is to identify
    Occupational Safety and Health requirements (OSH) in the contract document of
    selected construction projects. To achieve this objective, a total of seven contract
    document was collected from several construction companies. The qualitative analysis
    was performed to identify the extent of OSH requirements and costs are being
    mentioned in the contract documents. The finding shows that most of the contract
    document contains very little emphasis on OSH requirements and budgeting. Only one
    contract contains, an appendix that spell out about the safe work practices for
    construction works. The visible allocated budget for OSH requirements for all seven
    contracts is very minute range from 0.21% to 1.99% of contract value. In order to
    ensure that occupational safety and health is properly implemented, safety needs must
    be included in the budget because implementation it is not free, this can be achieved
    by making it a permanent feature in all bills of quantity of the project.
  5. Noor Fateen Afikah Yahya, Negar Dasineh Khiavi, Norahim Ibrahim
    MyJurnal
    Due to high energy demand worldwide, finding an alternative renewable and
    sustainable energy source is of great interest. Plant microbial fuel cell (P-MFC) is one
    of the most promising methods to generate green energy. In P-MFC, a plant is placed
    into the anode compartment. Mutual interaction between plant root rhizodeposits
    and bacterial community results in the biofilm formation at the vicinity of the
    rhizosphere area in plant root could be utilized to generate electricity. Indeed, in PMFC,
    bacteria metabolize rhizodeposits into electrons and protons. These electrons
    could be then converted into green electricity. The objectives of this research are to
    utilize Epipremnum aureum plant collected from Kota Tinggi’s lake to generate
    electricity and observe current generation by different resistors, to characterize
    immobilized bacteria attached on the anode surface then identify the optimum growth
    temperature for isolated bacteria. Five plant microbial fuel cells were constructed in a
    H-shape (dual- chambers) configuration in the plastic container. Maximum current
    density for 20 days for P-MFC by external resistance of 100k Ω was 0.1 µA/cm2
    with
    maximum power density of 0.85 µW/cm2 and the open circuit voltage (OCV) was
    measured at 195 mV. Besides, fresh biomass averages increased 5g after 20 days of
    experiments below and above ground as compared to the initial fresh biomass. Five
    isolated bacterial strains from the graphite felt surface found on the anode were
    screened by nine biochemical tests such as catalase, TSI (triple sugar iron agar), gelatin
    and etc. The immobilized bacteria attached to anode electrode in P-MFC were further
    examined with Fast Electron Scanning Electron Microscopy (FESEM). The isolated
    bacterial growth curves were determined at two different temperatures of 25 °C and
    37 °C. The optimum growth temperature predominantly for them was 37 °C.
  6. Ameera Syaheerah Abdul Aziz, Nurul Syahirah Mohamad Nasir, Norahim Ibrahim, Adibah Yahya
    MyJurnal
    In this study, we investigate the ability of the bacterial isolates from an Iraqi oil
    reservoir, namely POS and PCO Oil to decolorize commercially used model azo dye Acid
    Red-27(AR-27). The effects of inoculation volume and glycerol concentrations were
    optimized to develop an economically feasible decolourization process. The isolates
    were able to decolourize azo dye (AR27) at the highest decolorization efficiency of 98%
    in 10 mL bacterial solution consisted of POS and PCO Oil and in the presence of 6.34
    g/L glycerol. An optimized MFC using this bacterial consortium (POS + PCO Oil) and
    graphite rod electrodes produced a maximum open circuit voltage (OCV) of 175 mV, in
    the presence of potassium ferricyanide as the electron acceptor at the cathode. The
    maximum current density of 1.7 μA/cm² and power density of 59.3 μW/cm² were
    achieved when an external load of 5 kΩ was applied. Morphological analysis was
    performed using Scanning Electron Microscope (SEM) to prove the bacterial
    attachment onto the anode surface (graphite rod) in the MFC operation. This work
    proposed that the bacterial strains POS and PCO Oil possess the ability to decolorize
    Azo dye AR27 and generate electricity in the absence of nitrogen source.
  7. Deraman, R.F., Mahayadin, M., Mohd Ruslan, S.Z., Othman, N.I., Nasir, M.A.S.
    MyJurnal
    Many nonlinear problems that arise in various science and engineering fields can be
    modelled by the Goursat partial differential equations. Modelling these non-linear
    problems using the Goursat partial differential equations has not received much
    attention especially the theoretical aspect . The proposed scheme of solution is
    supported by examining a nonlinear Goursat problem. The verification of the
    theoretical results from several series of numerical experiments are discussed. Results
    obtained from Taylor series expansion show that the proposed new scheme is
    consistent. By using the von Neumann analysis and essence of stability, the proposed
    new scheme is found to be unconditionally stable. In addition, the trend of the
    numerical results shows that the new scheme is also convergent.
  8. Chee, L.P., Wan Alwi, S.R., Lim, J.S.
    MyJurnal
    Aggregate planning acts as a blueprint for all operational planning activities. Despite
    the substantial amount of research that has been done in determining methods to
    improve aggregate planning approaches, the industry is still at a loss when it comes
    to working on the tactical planning aspect, especially in aggregate production.
    Therefore, this research work aims to present a comprehensive and generalised
    framework that will formulate a realistic batch production environment using an
    interactive Production Decision Support System. This system consists of an aggregate
    planning framework that combines a simulation model and a Pinch Analysis graphical
    approach to improve the effectiveness and efficiency of the decision-making process.
    The target is to allow operational opportunities to be captured at first sight and thus,
    maximise organisational profit. The simplicity and practicality of this new Production
    Decision Support System is demonstrated through two illustrative examples where a
    total of four heuristics were identified and turned into the new strategies to avoid the
    stock-out scenarios.
  9. Mohamed Ibrahim J. Ibrahim, Mohd Zuhri Mohamed Yusoff
    MyJurnal
    This study presents an investigation about the effect of size variation on mechanical
    performance of square core interlocking structures, by using finite element analysis
    (FEA). The material used in this study is flax fibre reinforced polypropylene (PP)
    composite. Abaqus software was used for modelling and visualizing number of six
    interlocking honeycomb structures with different cell sizes and heights. In the first
    analysis, Abaqus/standard was performed on the perfect models by applying quasistatic
    loading to identify the imperfection shape and obtaining the buckling Eigenmodes
    for the models, then the Eigen-modes from abaqus/standard were imported
    to abaqus/explicit to run post-buckling analysis and simulate the overall imperfection
    behaviour of models. The numerical results from the finite element analysis
    simulation were used to plot load-displacement curve to each model. The area under
    the load-displacement curve represents the total absorbed energy, energy absorption
    per unit mass indicates the specific energy absorption, and the highest value of
    specific energy absorption represents the optimum size. The findings demonstrated
    that the square interlocking structure exhibits good energy absorption performance
    in some geometrical cases, and also revealed that the natural fibre composites have
    unique energy absorption capability under quasi-static loads.
  10. Nur Dini Jamil, Adekunle Qudus Adeleke
    MyJurnal
    This paper assessed the relationship between team competency and design risk
    management among Kuantan construction industries. Similarly, a survey was
    conducted among 10 local and national construction industries in Kuantan with a
    stratified random sampling. The returned questionnaires yielded 10 responses which
    was used for data analysis. Five point Likert scale categories of risk management from
    the previous studies was used and statistical analysis affirmed that there is positive
    relationship between team competency and design risk management among Kuantan
    construction industries.
  11. Nur Fazlina Abdul Rahman, Adekunle Qudus Adeleke
    MyJurnal
    In this paper, the influence of effective communication in construction risk
    management among Kuantan Malaysian construction industries was assessed. Then a
    survey was conducted on pilot test among 10 local construction industries in Kuantan
    Malaysian, using stratified random sampling, out of which 10 questionnaires were
    collected for data analysis. Methodologically, this research is perhaps the first to
    study the influence of effective communication on construction risk management
    among Kuantan Malaysian construction industries. Using the five point Likert scale
    categories of risk management from previous studies. Pearson Correlation anaylysis
    output results affirmed that there is a strong positive relationship between effective
    communication and construction risk management among Kuantan construction
    industries.
  12. Mohamed Khatif Tawaf, Doris Asmani Mat Yusof, Shahrul Nizam Mohamad, Diana Che Lat, Mohd For Mohd Amin
    MyJurnal
    Rock with moderate strengths (20 to 70 MPa) effectively excavated by ripping
    method which is considered as shallow excavation or surface striping method.
    Disputed between client and contractor often occur due to the lack of proper
    assessment to determine the rippabality of hard material. Practically, rippability of in
    situ rock is assessed based on field ripping test that being conducted using actual
    ripper dozer which is time-consuming and expensive. Therefore the assessment of
    rippability of rock based on specific laboratory tests able to resolve the conflict that
    occurs on ripping method. The correlation between specific energy with surface
    hardness and tensile strength is chose as the material properties to assess in order to
    determine the rippability of rock in this study. Few samples of Sandstone undergone
    several laboratory tests such as laboratory ripping test, Brazilian's test and Schmitt
    hammer test in order to obtain the required parameters in this study. The average
    tensile strength (σT) obtained was 4.62MPa with a range of value from 3.19 to 7.50
    MPa whilst the average rebound number (R) obtained for Sandstone was 26.6 with a
    range between 19.0 and 34.0. The specific energy (SE) obtained indicates an average
    value of 3.95 MJ/m3
    with a range value between 1.73MJ/m3
    and 6.45 MJ/m3
    . The
    correlation of R and σT with SE shows a relatively good relationship. Parameters of R
    and σT are acceptable and reliable for assessing rippability of Sandstone based on the
    value of regression coefficient (R2) which is consistence above 0.8 for both
    correlation between SE, R and σT.
  13. Nur Syafiqah Abdul Malik, Adekunle Qudus Adeleke
    MyJurnal
    This paper assessed the significant relationship between organizational culture and
    material risk among Kuantan Malaysian construction industries. Survey was
    conducted among 10 registered G7 contractors operating in Kuantan construction
    industry. Proportionate stratified random sampling was used out of which 10
    questionnaires were distributed for pilot study. Methodologically, this research is
    perhaps the first to assess the relationship between organizational culture and
    material risk among Malaysian construction industries with five point Likert scale
    categories of material risk from previous studies. Statistical analysis affirmed a
    significant positive relationship between organizational culture and material risk
    among Malaysian construction industries through Statistical Package for Social
    Sciences (SPSS).
  14. Nur A'shirah Mohd Azman, Adekunle Qudus Adeleke
    MyJurnal
    This paper assessed the effect of time overruns on apartment building among
    Kuantan Malaysian construction industries. A survey was conducted among 10
    construction industries in Kuantan Pahang. Using proportionate stratified random
    sampling, out of which 10 questionnaires were distributed for data analysis. Using
    five point Likert scale categories from previous studies, statistical analysis affirmed a
    significant positive relationship between time overruns and apartment building
    among Kuantan Malaysian construction industries.
  15. David Olugbenga Taiwo, Nooraini Yusoff, Norsiah Abdul Aziz
    MyJurnal
    Housing is ranked second as a basic human need after food. Generally, there is
    inadequate housing both in the rural and urban centres in most of the developing
    countries. The issue of housing quality seems to be common in the rural areas
    whereas the major housing problem in urban areas is more of insufficient supply
    from which the people can make choices. In any preference and choice situation,
    certain underlying motivational factors make it possible for an individual to evaluate
    available alternatives. Preferences and choices are dynamic operational activities
    individuals make based on changing circumstances and situations. The study
    examines housing choices and preferences within the Nigerian housing delivery
    systems. The study employed quantitative method of data collection. A total of 434
    questionnaires were distributed to selected households in the South West,
    geopolitical zone of Nigeria. The analysis was based on 359 retrieved questionnaires
    that represented 82.7 percent response rate. Descriptive statistics, relative
    importance index and regression analysis was used for the analysis. Using relative
    importance index, the study found out that 41 percent of the respondents preferred
    3 bedroom flat with a relative importance index of 0.74, followed by 2 bedrooms flat
    with RII of 0.64, self-contain with RII of 0.61. The study also revealed that the state of
    the national economy plays a prominent role in individual’s housing preferences and
    choices and increasingly a large number of Nigerians find housing to be beyond the
    family budget. The authors are also of the opinion that policy measures that
    incorporate the design of low-cost social housing and the creation of conducive
    environment for developers such as the granting of tax break and provision of
    subsidy may promote a better housing delivery system. Consideration of user
    preferences for housing is a requirement to meeting and satisfying housing needs.
  16. Ahmed, Ibrahim Galadima, Abdurrahman Abubakar, Sulaiman Mohammed, Abdulkarim Ali Deba
    MyJurnal
    Phytoremediation is considered as a cost-effective and environmentally friendly
    technique for decontaminating environments that have been contaminated with
    heavy metal ions. The technique describes the use of plants and their concomitant
    microbes to mitigate environmental contaminations. However, conventional
    remediation techniques like chemical, thermal and physical treatment methods are
    too costly, and may end of causing more contamination to the environment.
    Phytoremediation practice provides a major information on the utilization of plants
    and their materials in decontaminating polluted environments. Heavy metals and
    other organic contaminants are among the most precarious substances released into
    the environment which have an eminent level of toxicity and sturdiness of both
    aquatic and terrestrial organisms. The review aimed at providing a broad
    understanding of utilizing various plants and their materials in decontaminating
    polluted environments with heavy metals and other organic contaminants. It also
    provided the general methods used in treating the aforementioned contaminants in
    an environment. The review further discussed the classes of phytoremediation like
    phytoextraction, phytovolatilisation, phytostabilization, phytotransformation,
    phytodegradation and phytofiltration. The generalized advantages and disadvantages
    of phytoremediation were ultimately highlighted.
  17. Nurushshahirah Sabodin, Adekunle Qudus Adeleke
    MyJurnal
    This paper examined the significant relationship between government regulation and
    construction waste management among Malaysian construction industries. Survey
    was conducted among 10 contractors registered G7, using proportionate stratified
    random sampling, out of which 10 questionnaire were collected for data analysis with
    five point Likert scale categories of waste management from previous studies,
    statistical analysis affirmed a significant positive relationship between government
    regulation and construction waste management in Malaysian construction industries
    through Statistical Package for the Social Sciences.
  18. Hamami, G., Mazni, M., Amir, M. S., Sukarman, F., Katon, M.
    MyJurnal
    In the local path planning navigation, a particular focus is given to local minimum
    problem. This problem occurs when a robot manoeuvre towards a desired target with no initial
    information of the environment and gets trapped in an infinite loop or also known as a dead
    end trap. Besides the local minimum situation, there are even worse situation in which when a
    mobile robot encounters two or more dead ends in a row. This situation is known as “multiple
    minimum” situation. The situation is forming more complicated problem than the local
    minimum situation. In this paper, a complete review is given on the local minimum and multiple
    minimum problems and the available solutions for these situations are discussed in detail.
    Copyright © 2016 Penerbit Akademia Baru - All rights reserved.
  19. Mohammad, R., Amin, Z., Abdul Aziz, S., Othman, N.
    MyJurnal
    The aim of this paper is to measure the safety awareness level of workers by means of
    hand related injury accident recorded in Production Department of Metal Fabrication Process
    Company located in southern peninsular Malaysia. Base on the accident data obtained from year
    2008 until 2012, it showed an increasing numbers of accidents involving hand. In year 2008 the rate
    is 36.3%, year 2009 is 30%, year 2010 is 37.5%, year 2011 is 33.3% and year 2012 is 37.5%. Site
    observation has been conducted to assess the hazards involve (safety and ergonomic) to the metal
    fabrication activities being carried out. Survey Questionnaires have been distributed to 80
    respondents from different job trade. The Respondent data was analysed to obtain the safety
    awareness level for each worker’s trade. Copyright © 2015 Penerbit Akademia Baru - All rights
    reserved.
  20. Kadir, Z. A., Mohammad, R., Othman, N.
    MyJurnal
    Purpose of this study to be conducted is to identify the risk factor of low back pain amongst port crane operator and to improve the health management program in the company. The objectives of this study are to evaluate the major group of port crane operator that having low back pain problem, to analyse the risk factors that associated to low back pain problem (WBV, Awkward prolonged sitting and shift work-psychological) , individual characteristics (sport activity or hobby), to analyse the associated rate operator’s absence from work (medical leave) and low back pain problem and to propose the basic ergonomic assessment checklist for management to investigate health incident cases and fit-to-work (ergonomics) screening checklist for new recruitment. A survey research design through the distribution of the questionnaire and interview & field observation will
    be used for research methodology. The population of this study consists of port crane operatorsRubber Tyred Gantry Operator (RTG). Questionnaire method used to collect all relevant information from correspondence. Interview also will be conducted to gain further details information. Data were analyzed with the usage of Statistical Package for the Social Sciences (SPSS) to make the process of analysis easier. As result, firstly, the study shown that there are association of risk factor for working posture and years of exposure with Low back Pain. The null hypothesis was rejected and there is probability that these risk factors have influence the low back pain. It was also concluded that the null hypothesis was accepted which means there are no correlation of risk factors for heavy physical works, previous job experience, previous accident with low back pain problem. Thirdly, the study
    shown there are no correlation of rate operator’s absence from work (medical leave) with low back pain problem as the null hypothesis was accepted with p value <0.05
    Keywords: Port, Low Back Pain, Ergonomics, Occupational Safety & Health, Rubber tyre gantry, Back Pain
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