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Commercial fishery assessment of Malaysian water offshore structure
Mohd Hairil Mohd,Mohd Izzat Mohd Thiyahuddin,Mohd Asamudin A Rahman,Tan Chun Hong,Hii Yii Siang,Nor Adlina Othman,Azam Abdul Rahman,Ahmad Rizal Abdul Rahman,Ahmad Fitriadhy 한국수산과학회 2022 Fisheries and Aquatic Sciences Vol.25 No.9
To have a better understanding of the impact of the PETRONAS oil and gas platform on commercial fisheries activities, Universiti Malaysia Terengganu (UMT) examined two approaches which are data collection from satellite and data collection from fishermen and anglers. By profiling the anglers who utilize reefed oil and gas structures for fishing, it can determine if the design and location of the reef platforms will benefit or negatively impacts those anglers and fisherman. Furthermore, this assessment will be contributing to the knowledge regarding the value of offshore oil and gas platforms as fisheries resources. Collectively, the apparent fishing activity data included, combined with the findings in the reefing viability index will help to inform PETRONAS’s future decommissioning decisions and may help determine if the design and proposed locations for future rigs-to-reefs candidates would benefit commercial fishing groups, further qualifying them as appropriate artificial reef candidates. The method applied in this study is approaching by using a data satellite known as Google’s Global Fishing Watch technology, which is one of the applications to measure commercial fishing efforts around the globe. The apparent commercial fishing effort around the selected twelve PETRONAS platforms was analyzed from January 2012 to December 2018. Using the data collection from fishermen which is the total estimation of commercial fish value cost (in Malaysia ringgit, MYR [RM]) in Peninsular Malaysia Asset, Sabah Asset, and Sarawak Operation region. The data were extracted every month from 2016 to 2018 from the National Oceanic and Atmospheric Administration database. Most of the selected platforms that show a high frequency of vessels around the year are platform KP-A, platform BG-A and platform PL-B. The estimated values of commercial fishes varied between platforms, with ranged from RM 10,209.92 to RM 89,023.78. Thus, platforms with high commercial fish value are selected for reefing in-situ and will serve multi-purposes and benefit the locals as well as the country. The current study has successfully assessed the potential reefing area of the Malaysian offshore environment with greater representativeness and this paper focused on its potential as a new fishing ground.
Mohd Azlin Mohd Nor,Salit Mohd Sapuan,Mohd Zuhri Mohamed Yusoff,Edi Syams Zainudin 한국섬유공학회 2022 Fibers and polymers Vol.23 No.10
Composite mats based on submicron biopolyester fibers, such as poly(3-hydroxyalkanoate)s, and zinc oxide(ZnO) nanoparticles have been exploited in medicine and environmental areas, as antibacterial wound dressings or filters. Generally, the resulting mat
Composite PD and Fuzzy Logic Approach for Vibration of Elastic Joint Manipulator
Mohd Ashraf Ahmad,Raja Mohd Taufika Raja Ismail,Mohd Syakirin Ramli,Mohd Anwar Zawawi,Mohd Helmi Suid 제어로봇시스템학회 2010 제어로봇시스템학회 국제학술대회 논문집 Vol.2010 No.10
The increased complexity of the dynamics of robots manipulator considering joint elasticity makes conventional model-based control strategies complex and difficult to synthesize. This paper presents investigations into the development of composite collocated proportional-derivative (PD) and Fuzzy Logic Control for trajectory tracking and vibration control of a flexible joint manipulator respectively. To study the effectiveness of the controllers, a collocated PD Controller is developed for tip angular position control of a flexible joint manipulator. This is then extended to incorporate a non-collocated Fuzzy Logic Controller for vibration reduction of the flexible joint system. Simulation results of the response of the flexible joint manipulator with the controllers are presented in time and frequency domains. The performances of the composite control schemes are examined in terms of input tracking capability, level of vibration reduction and time response specifications. Finally, a comparative assessment of the control techniques is presented and discussed.
Rohani Mohd Fazrin Mohd,Yonan Siti Nurshahirah Mohd,Tagiling Nashrulhaq,Zainon Wan Mohd Nazlee Wan,Udin Yusri,Nawi Norazlina Mat 대한척추외과학회 2020 Asian Spine Journal Vol.14 No.5
Study Design: Retrospective study.Purpose: This study aims to semiquantitatively evaluate the standardized uptake value (SUV) of <sup>99m</sup>Tc-methylene diphosphonate (MDP) radionuclide tracer in the normal vertebrae of breast cancer patients using an integrated single-photon emission computed tomography (SPECT)/computed tomography (CT) scanner.Overview of Literature: Molecular imaging techniques using gamma cameras and stand-alone SPECT have traditionally been utilized to evaluate metastatic bone diseases. However, these methods lack quantitative analysis capabilities, impeding accurate uptake characterization.Methods: A total of 30 randomly selected female breast cancer patients were enrolled in this study. The SUVmean and SUVmax values for 286 normal vertebrae at the thoracic and lumbar levels were calculated based on the patients’ body weight (BW), body surface area (BSA), and lean body mass (LBM). Additionally, 106 degenerative joint disease (DJD) lesions of the spine were also characterized, and both their BW SUVmean and SUVmax values were obtained. A receiver operating characteristic (ROC) curve analysis was then performed to determine the cutoff value of SUV for differentiating DJD from normal vertebrae.Results: The mean±standard deviations for the SUVmean and SUVmax in the normal vertebrae displayed a relatively wide variability: BW=3.92±0.27 and 6.51±0.72, BSA=1.05±0.07 and 1.75±0.17, and LBM=2.70±0.19 and 4.50±0.44, respectively. Generally, the SUVmean had a lower coefficient of variation than the SUVmax. For DJD, the mean±standard deviation for the BW SUVmean and SUVmax was 5.26±3.24 and 7.50±4.34, respectively. Based on the ROC curve, no optimal cutoff value was found to differentiate DJD from normal vertebrae.Conclusions: In this study, the SUV of <sup>99m</sup>Tc-MDP was successfully determined using SPECT/CT. This research provides an approach that could potentially aid in the clinical quantification of radionuclide uptake in normal vertebrae for the management of breast cancer patients.
Bending Behaviour of Different Types of Timber I-Joist
Wan Mohd Nazri Wan Abdul Rahman,Nor Yuziah Mohd Yunus,Mohd Omar Mohd Khaidzir,Mohd Syahrul Hisyam Mohd Sani 대한토목학회 2022 KSCE JOURNAL OF CIVIL ENGINEERING Vol.26 No.5
Engineered wood I-joist is a structural system that comprises of flanges and web elements, and utilised as beams in buildings. Both elements must work together as a structural system to fit and meet the strength behaviour of a solid wood beam. The main objective of the study was to determine the bending strength behaviour of I-joist which produced from three types of jointed technique (finger, L-butt and nail plate) of oriented strand board (OSB) web element with two types of flange element (Keruing solid wood and laminated veneer lumber (LVL)). A total of 18 specimens of I-joist were tested to determine the bending behaviour, especially the modulus of elasticity (E) and modulus of rupture (MR). From the result of testing, LVL flanges specimen were obtained almost as strong as the specimens with solid wood flanges. Additionally, either solid wood or LVL flange was shown non-significant variances in bending strength behaviour because the MR values of the I-joist were insignificantly affected by flange element material. The I-joist specimen with finger jointed web was observed to be the strongest specimen when compared with other joints. Furthermore, the weakest joint among the three types of joints were fabricated with nail plate jointed web. The failures mode of the I-joist specimens were observed to fail due to tension or compression.
Siti Asma’ MOHD ROSDI(Siti Asma’ MOHD ROSDI ),Mohamad Rohieszan RAMDAN(Mohamad Rohieszan RAMDAN ),Sabrinah ADAM(Sabrinah ADAM ),Nursyazwani Mohd FUZI(Nursyazwani Mohd FUZI ),Azila ABDUL RAZAK(Azila AB 한국유통과학회 2022 유통과학연구 Vol.20 No.11
Purpose: This article explores the experiences of Research Universities (RU) on distribution-support technologies in commercialisation with a specific focus in the Malaysian context. Research design, data and methodology: A qualitative research was carried out, in which six RU were interviewed. A structured interview was conducted. To analyse and interpret the data was using an approach adopted in qualitative thematic strategy. The findings were transcribed using Atlas.ti software to analyse related themes through a thematic analysis approach to link theories. Results: The findings provide useful insights into the significant roles of distribution-support technologies on the commercialisation strategy and impacts on the ecosystem of innovation and commercialisation in providing the importance of Distribution-support Technologies to strengthen the role of university-industry-community relation to drive the economy towards a high-income nation. Conclusions: This study will contribute theory through commercialisation literature by adding new knowledge concerning the link between universities and distribution-support technologies in commercialisation. Therefore, the practical contributions are significant for universities; industries; research institutes; government and societies to develop and plan strategically for effective, strategic and sustainable distribution-support technologies in innovation and commercialisation ecosystem.
Optical Anisotropy in Micromechanically Rolled Carbon Nanotube Forest
Mohd Asyraf bin Mohd Razib,Masud Rana,Tanveer Saleh,Harrison Fan,Andrew Koch,Alireza Nojeh,Kenichi Takahata,Asan Gani Bin Abdul Muthalif 대한금속·재료학회 2017 ELECTRONIC MATERIALS LETTERS Vol.13 No.5
The bulk appearance of arrays of vertically aligned carbonnanotubes (VACNT arrays or CNT forests) is dark as theyabsorb most of the incident light. In this paper, two postprocessingtechniques have been described where the CNTforest can be patterned by selective bending of the tips of thenanotubes using a rigid cylindrical tool. A tungsten tool wasused to bend the vertical structure of CNTs with predefinedparameters in two different ways as stated above: bendingusing the bottom surface of the tool (micromechanicalbending (M2B)) and rolling using the side of the tool(micromechanical rolling (M2R)). The processed zone wasinvestigated using a Field Emission Scanning ElectronMicroscope (FESEM) and optical setup to reveal the surfacemorphology and optical characteristics of the patterned CNTson the substrate. Interestingly, the polarized optical reflection from the micromechanical rolled (M2R) sample was found to besignificantly influenced by the rotation of the sample. It was observed that, if the polarization of the light is parallel to thealignment of the CNTs, the reflectance is at least 2 x higher than for the perpendicular direction. Furthermore, the reflectancevaried almost linearly with good repeatability (~10%) as the processed CNT forest sample was rotated from 0° to 90°.
Experimental Analysis of Cold-Formed Steel C-Sections with the Notch Subjected to Axial Compression
Mohd Syahrul Hisyam Mohd Sani,Fadhluhartini Muftah,Cher Siang Tan 대한토목학회 2020 KSCE JOURNAL OF CIVIL ENGINEERING Vol.24 No.4
Studies on the use of cold-formed steel (CFS) C-section, which is a civil engineering material, in building and civil engineering work are still on-going. The advantages of the CFS C-section are becoming so interesting that it is often being used as a roof truss system, storage rack, and wall framing. In order to have a roof truss system with a strong, safe, and stable condition, a study on truss member was carried out using the cut-curving process. Before the CFS C-section was curved, the process started by cutting the section in a proper way. A parametric study was conducted to determine the suitability of the cut pattern which recognised as a notch in the section and find out whether or not the notch depth would affect the ultimate load of the CFS C-section column. The study of CFS C-section was separated into two parts; firstly, to investigate the mechanical behaviour of the column in different notch depths and secondly, to investigate the behaviour in different column height with fixed notch depth. The notch width of 3 mm and notch spacing of 100 mm for both parts were fixed. Total specimen for both parts were 15 specimens. The results of the study showed that the reduction of the ultimate load was about 56 – 65% of the variation of notch depth section when compared with the normal section. Therefore, the ultimate load of the section with the notch decreased when the notch depth increased. In addition, the study illustrated that the reduction of the ultimate load was 64 – 82% of the variation of column height between 100 mm to 500 mm. Finally, the average percentage of the column height was 72% which can use in the modification of CFS C-section without notch to CFS C-section with notch calculation.