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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.
Abdullah Hairil Rizal,Lim Daniel Yan Zheng,Ke Yuhe,Salim Nur Nasyitah Mohamed,Lan Xiang,Dong Yizhi,Feng Mengling 대한마취통증의학회 2024 Korean Journal of Anesthesiology Vol.77 No.1
Background: To enhance perioperative outcomes, a perioperative registry that integrates high-quality real-world data throughout the perioperative period is essential. Singapore General Hospital established the Perioperative and Anesthesia Subject Area Registry (PASAR) to unify data from the preoperative, intraoperative, and postoperative stages. This study presents the methodology employed to create this database.Methods: Since 2016, data from surgical patients have been collected from the hospital electronic medical record systems, de-identified, and stored securely in compliance with privacy and data protection laws. As a representative sample, data from initiation in 2016 to December 2022 were collected.Results: As of December 2022, PASAR data comprise 26 tables, encompassing 153,312 patient admissions and 168,977 operation sessions. For this period, the median age of the patients was 60.0 years, sex distribution was balanced, and the majority were Chinese. Hypertension and cardiovascular comorbidities were also prevalent. Information including operation type and time, intensive care unit (ICU) length of stay, and 30-day and 1-year mortality rates were collected. Emergency surgeries resulted in longer ICU stays, but shorter operation times than elective surgeries.Conclusions: The PASAR provides a comprehensive and automated approach to gathering high-quality perioperative patient data.
Rasdin Ridwan,Hairil Rashmizal Abdul Razak,Mohd Ilham Adenan,Wan Mazlina Md Saad 한국식품영양과학회 2019 Preventive Nutrition and Food Science Vol.24 No.1
Nutritional intervention of fruit juice supplementation is able to maximize exercise performance. Watermelon [Citrullus lanatus (Thunb.) Matsum. and Nakai] contains high L-citrulline content and consumption of watermelon juice may promote ergogenic effects. The aim of the present study was to investigate the role of 100% flesh watermelon juice and 100% rind watermelon juice supplementation for 14 days on swimming performance in rats. Twenty four male Sprague-Dawley rats were randomly divided into four groups: Cx group of rats supplemented with filtered tap water (negative control), L-cit group of rats supplemented with L-citrulline (positive control), FR group of rats supplemented with 100% flesh watermelon juice, and RR group of rats supplemented with 100% rind watermelon juice. Each group was supplemented for 14 days ad libitum prior to swimming exercise protocol. The rats were performed swimming exercise for 3 days and swimming time until exhaustion was measured. Plasma samples were collected to measure lactate concentration, ammonia concentration, and nitric oxide production. Rats supplemented with 100% flesh watermelon juice demonstrated significantly prolonged of swimming time until exhaustion, reduction of lactate and ammonia concentrations, and increased of nitric oxide production compared to Cx and L-cit groups (P<0.05). These findings postulate that supplementation with 100% flesh watermelon juice improves endurance in swimming performance.
김도균,김한별,Mohd Hairil Mohd,백점기 대한조선학회 2013 International Journal of Naval Architecture and Oc Vol.5 No.1
This study compares the Residual ultimate longitudinal strength – grounding Damage index (R-D) diagrams produced by two analysis methods: the ALPS/HULL Intelligent Supersize Finite Element Method (ISFEM) and the design formula (modified Paik and Mansour) method – used to assess the safety of damaged ships. The comparison includes four types of double-hull oil tankers: Panamax, Aframax, Suezmax and VLCC. The R-D diagrams were calculated for a series of 50 grounding scenarios. The diagrams were efficiently sampled using the Latin Hypercube Sampling (LHS) technique and comprehensively analysed based on ship size. Finally, the two methods were compared by statistically analysing the differences between their grounding damage indices and ultimate longitudinal strength predictions. The findings provide a useful example of how to apply the ultimate longitudinal strength analysis method to grounded ships.
A risk-based inspection planning method for corroded subsea pipelines
Seo, Jung Kwan,Cui, Yushi,Mohd, Mohd Hairil,Ha, Yeon Chul,Kim, Bong Ju,Paik, Jeom Kee Elsevier 2015 Ocean engineering Vol.109 No.-
<P><B>Abstract</B></P> <P>Risk assessment procedures for subsea projects are a key component of design and maintenance and inspection efforts, as resulting operating time may cause aging damages to adjacent subsea equipment. In particular, for subsea pipeline management work, corrosion of pipelines may impinge on a vast number of subsea pipeline systems and can result in significant environmental and financial risks, unless the appropriate management methodologies are implemented. Hence, this paper presents risk based on probability of failure (PoF) and consequence of failure (CoF) estimation of a time-variant corrosion model and burst strength for the corroded oil pipelines. The probability of corrosion defect is calculated as PoF, which is a time-variant model from measured data in the subsea industry and CoF is considered as the burst strength of corroded pipelines. Pipeline consequence modelling is performed using regulation design codes to simulate the pipeline strength and calculate the probability. The proposed methodology offers a standardised procedure for incorporating both design and inspection/maintenance planning aspects of pipeline systems, thereby providing a more systematic, comprehensive procedure for risk-based inspection than previously available.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Proposed a risk-based inspection planning method for subsea pipelines. </LI> <LI> Provided calculation method for PoF and CoF of corroded pipeline. </LI> <LI> Provided the inspection planning and/or maintenance time using risk form. </LI> </UL> </P>
Othman Nor Adlina,Mohd Mohd Hairil,A Rahman Mohd Asamudin,Musa Mohd Azlan,Fitriadhy Ahmad 대한조선학회 2023 International Journal of Naval Architecture and Oc Vol.15 No.-
This paper investigates the corrosion factor to the global strength of aging offshore jacket platforms in different marine zones. The time-dependent corrosion wastage model from Melchers, an active corrosion expert, by considering different marine zones, i.e., atmospheric, splash, and immersion. In addition, three aged jacket platform models of the originally installed platform were selected to investigate the effect of corrosion wastage on global strength. The jacket platform's global strength is calculated by the Reserve Strength Ratio (RSR) value. RSR is obtained via nonlinear static pushover analysis and is always used to estimate overall structure strength reserves. Safety assessment is evaluated by the PETRONAS Technical Standard (PTS). According to this study, immersion zone corrosion is the most influential zone after splash zone corrosion. Furthermore, the study also predicts the lifetime of each jacket platform, and it is useful for structural engineers to estimate corrosion allowance at the early design stage.