DSpace Cris Angular :: Browsing by Type "Conference paper"

Browsing by Type "Conference paper"

Now showing 1 - 20 of 950

Accidental Explosions, Beirut ANFO Blast, Ghana Truck Explosion, Global Terrorism Index 2021-22, and Blast Mitigation: A Review
(EDP Sciences, 2024)
Anas S.M.
;
Al-Dala'ien R.N.
;
Akram S.
;
Alam M.
;
57219929545
;
57219563631
;
58657980400
;
57213805388
Explosions are continually occurring without ceasing in many parts of the world endangering human lives and seriously affecting the health of infrastructures and facilities. Industry accidental mishaps that occurred recently, like those in Ghana (2022; 17 deaths), Russia (2021; 18 deaths), Beirut (2020; 220 deaths; $8bn economic loss), and Tientsin (2015, 173 deaths; $6.86bn economic loss), indicate the severity of the industrial devastation one could gauge that explosions may cause. Very recently, another industrial blast occurred at a rocket and explosive factory in the capital city of Turkey leading to the collapse of a nearby building and causing 5 deaths and serious injuries to over 50 civilians, is an eye-opener. This article offers a condensed examination of subjects related to explosions, including accidental detonations, the Beirut ANFO explosion, and the Ghana truck explosion. The report findings from the global terrorism index 2021-22 are analyzed and discussed. Additionally, strategies for both active and passive measures to mitigate the impact of explosions on infrastructure and facilities are emphasized. To ensure safety and durability against damage, the structure needs to possess resilience in the face of explosions. Therefore, it is crucial to analyze how the structure responds to extreme loading in order to enhance the design philosophy. Currently, there is still a lack of understanding regarding the mechanism of blast and how it affects masonry structures. Consequently, further research is required to delve deeper into this subject. ? 2024 EDP Sciences. All rights reserved.
6
Adoption and implementation of IoT technology for hybrid renewable energy system
(American Institute of Physics, 2024)
Ismail F.B.
;
Dihrab S.
;
Al-Bazi A.
;
Azahar N.A.H.
;
58027086700
;
25653977800
;
35098298500
;
59180747300
The Internet of Things (IoT) in the renewable energy sector is a communication network that connects the sensors in different renewable energy resources and the software for exchanging data or carrying out functions. Continuous monitoring, forecasting of electric energy usage, and renewable energy power generation are needed for optimal power use and consumption. New networking and data processing tools are being used in projects to promote the integration of renewable energies and leverage their resources. This study shows the result of using IoT to monitor hybrid renewable systems for stand-alone in rural areas. This study aims to implement and adopt a better and more efficient wireless monitoring system to access information and create an automated workflow. Solutions based on IoT protocol allow remote monitoring and optimizing power management. The system consists of a solar panel, charge controller, battery, inverter, load, and IOT system to monitor its electrical parameters. The result of the study shows that the system has high accuracy with 98.6%. ? 2024 Author(s).
3
Advancements in solar updraft towers: a comprehensive review
(EDP Sciences, 2024)
Natarajan R.
;
Sambath Y.
;
Chinnasamy S.
;
Prakash K.B.
;
Mohanty A.
;
Suresh Kumar M.
;
Arul M.
;
57221382498
;
59413729700
;
57207983571
;
57209849755
;
55521129800
;
58930486700
;
57211646009
The desire for a carbon-free planet has prompted a few experts to advocate for the most abundant energy known to us i.e Solar Energy. There are lots of solar powered energy systems in which the solar chimney power plant has been significant among passive methods in generating carbon free power. There are many attempts taken both experimentally as well as theoretically in developing efficient solar chimneys. This article reviews the major activities carried out in the various topographical regions covering significant research articles. In addition, the survey focuses on experimental research, understanding and recreational works, applications, and analogous work references, all of which are based on a broad range reference. Further, discussion on the research gap in each of the section is included with recommendations for future enhancement of this technology. ? 2024 EDP Sciences. All rights reserved.
1
Analysing type of plants for reducing noise pollution in climate change adaptation
(Institute of Physics, 2024)
Hashim W.
;
Jamaludin S.M.
;
Mohamed R.M.A.R.
;
Gunasekaran S.S.
;
Thabit R.
;
Gohel H.
;
11440260100
;
57337154300
;
59231501800
;
55652730500
;
58891173100
;
59230372100
The noisier a region or city is, the faster the rate of global warming. Noise is not a substance. However, most sources of carbon dioxide and other greenhouse gases are also sources of noise; for example, busy highways in cities can occasionally see as many as 100 cars per hour. Planting trees to mitigate noise pollution has been identified as one of the most sustainable methods to employ, since plants may function as a buffer and absorb sounds. Several plant species were chosen to assess noise absorption based on parameters such as leaf thickness, breadth, surface area, and length. The initial goal of this study is to estimate the noise absorption on the selected flora native to the Malaysian environment, where the noise was measured using an in-house developed impedance tube to discover the effective acoustic characteristics of leaves. The investigation was then carried on by assessing the data on the correlation coefficient parameter in order to determine the link between noise absorption and leaf features. Because of the freshness and perishability of the materials, measurements were repeated twice. Only 100% and 50% vegetation quantity size were measured for 10 sample species during the initial data collection. According to the findings, half of the leaves' features were connected with noise absorption. This might be owing to the freshness state, which cannot be maintained for an extended period of time. To acquire a better value, the experiment was repeated within the permissible freshness time. The findings are as predicted, with the maximum noise absorption and features correlation at 100% plant density including twigs. When the vegetation amount is lowered to 50%, this will progressively diminish. The notion is confirmed by the fact that a tube packed with thicker samples absorbs more noise. The correlation study identifies that each leaf has its unique capacity for noise absorption dependent on its properties and freshness level. ? Published under licence by IOP Publishing Ltd.
4
Analysis on voltage stability on power grid connected to solar PV
(American Institute of Physics, 2024)
Kamaruddin M.I.
;
Kamil K.
;
Hashim H.
;
Chong K.H.
;
Mansor M.H.
;
58968192400
;
57195622807
;
56644250200
;
36994481200
;
56372667100
Electricity is essential to human being and is a key factor in a country's economic growth. Researchers have been urged to concentrate on improving power supply, efficiency and reliability as a result of electricity issues. This pursuit has increased the desire to integrate renewable energy which in terms of solar photovoltaic (PV) into the power grid in order to address the issue of energy scarcity. However, the significant rise in solar power generations and decreasing the power production of synchronous generators in the grid also may present technological complications and major impacts on system stability. Voltage stability refers to the power system network's ability to sustain fixed tolerable voltage across all network buses under standard operating conditions as well as after a disruption. This research focuses on the impact of solar PV energy as a source of network disruption. This is due to the fact that this type of energy source has now advanced to a higher level of integration into the national grid. Furthermore, Voltage Stability Indices (VSI) were being introduced to indicates the voltage stability of the system. Under VSI there were several voltage stability indicators can be used to determine the weakest area and voltage stability of the system. To achieve the main research objectives, the network system is developed based on the test case of the IEEE 30-bus system by using Power System Simulator for Engineering software (PSSE). Voltage stability indicators such as the Fast Voltage Stability Index (FVSI) and Line Stability Factor (LQP) were proposed in this project. FVSI is used to identify the weakest area of the system, while LQP is used to analyse the voltage stability of the system. Last but not least the impact of solar PV on line loading percentage is also being observed. The reason for this is that if there is a higher output of solar PV integrated into the system, it may affect the system's line loading percentage. The simulation results will be elucidated based on the results obtained to strengthen the theory behind the related works. ? 2024 Author(s).
5
Assessing customer satisfaction on service quality of Light Rail Transit (LRT) transportation in Malaysia
(American Institute of Physics, 2024)
Azlan N.N.I.M.
;
Norhisham S.
;
Roslan R.
;
Yuzainee M.Y.
;
Bakar M.F.A.
;
Ismail N.
;
Rais N.M.
;
Yukawa S.
;
Wakijan A.
;
Masjuki S.A.
;
57208010131
;
54581400300
;
59047788000
;
59012175000
;
58294061800
;
26649849000
;
55838141000
;
57221600592
;
58651929900
;
57205237952
The public transportation system is a crucial component of core infrastructure and plays a significant role in the country's growth. Rail transportation is the preferred mode of travel for many users due to its dedicated railway lines, distinguishing it from other forms of public transportation that share the road with other vehicles. However, in Malaysia, there is a lack of safety and security at Light Rail Transit (LRT) stations, which has resulted in accidents involving passengers falling onto the tracks. Such incidents can erode customers' trust in the quality of LRT service. Therefore, this research aims to evaluate customer satisfaction with the service quality of LRT in Malaysia. The data for this study were collected through survey questionnaires from 139 respondents who use the LRT as their daily mode of transportation. These data were then categorized into seven dimensions of service quality: assurance, empathy, reliability, responsiveness, tangibility, safety and security, and accessibility. Importance-Performance Analysis (IPA) was used to analyze the data. The research findings revealed that the most critical and top-priority dimension of LRT service is accessibility, as it falls within the first quadrant of the IPA matrix. Based on these results, LRT operators and stakeholders can focus on improving customer satisfaction by addressing the various dimensions accordingly. Overall, this study highlights the importance of evaluating customer satisfaction with LRT service quality and provides insights that can be utilized to enhance the overall customer experience. ? 2024 Author(s).
9
Assessing the Sectoral Economics Consequences of Carbon Price Using Price-Output Model Analysis
(Institute of Physics, 2024)
Salim S.
;
Mardhiah S.
;
Mustapa
;
Indati S.
;
59350403700
;
59350054600
;
57201436857
;
59349827100
A carbon pricing policy is featured in the Twelfth Malaysia Plan as a considered measure for Malaysia to achieve its net-zero emissions goal by 2050.This study utilised price and output model analysis using Eora Multi-Region Input-Output Table 2016 (MRIO) database to assess the impact of carbon tax policy on price and output changes. The study reveals that the manufacturing sector is the most sensitive to the introduction of a carbon tax, with pronounced effects including a price escalation of 0.54% and a reduction in output of 0.81%. The ranks of sensitivity then followed by agriculture, services, mining and construction sector. the services sector presents a compelling opportunity for policymakers, offering a robust tax revenue stream while displaying lower vulnerability to the tax's effects. This observation underscores the importance of a strategic approach in carbon tax policy, where the potential for revenue generation is balanced against the differential impacts on sectoral vulnerability. This study provides an insightful information for policymakers to develop strategic plans to ensure a smooth transition towards carbon pricing policy and foster sustainable economic development. ? 2024 Institute of Physics Publishing. All rights reserved.
2
Assessing thermophysical properties of Nanostructured Cellulose Nano Crystal (CNC) and Graphene Nanoplatelets (GNP) Additives in Palm Oil-Based Heat Transfer Fluid
(EDP Sciences, 2024)
Kulandaivel S.
;
Samykano M.
;
Wai Keng N.
;
Suraparaju S.K.
;
Kumar Rajamony R.
;
58931248000
;
57192878324
;
58930087700
;
57210569066
;
57218845246
This study explores the examination of the thermophysical characteristics of eco-friendly CNC-Palm oil, GNP-Palm oil and CNC/GNP-palm oil mono and hybrid nanofluids. The stability assessment involves a comprehensive analysis, incorporating visual observations and thermal conductivity assessments. Notably, it was observed that an elevated proportion of hybrid mixture contributed to the enhanced stability of the nanosuspension, ensuring the uniform dispersion of nanomaterials within the base liquid for an extended period. The results indicate that hybrid nanofluids containing CNC/GNP and formulated with palm oil exhibit substantial stability. A comprehensive visual examination over an impressive 30-day duration reveals minimal accumulation, underscoring the enduring stability of these nanofluids. The study also examines crucial thermal and physical properties, including thermal conductivity and viscosity about temperature. The most significant enhancement was witnessed in thermal conductivity, achieving a noteworthy 100% increase in the 0.1w/v% concentrated CNC/GNP/Palm Oil hybrid nanofluid at 70�C, demonstrating a significant improvement compared to the base fluid. Furthermore, there are noticeable increments in viscosity, albeit with a more modest enhancement compared to thermal conductivity. These outcomes suggest a direct relationship between the increased concentrations can improve stability and thermal conductivity. This study contributes valuable insights into utilizing CNC/GNP in nanofluid applications, with implications for fields requiring enhanced thermal performance and fluid stability. ? 2024 EDP Sciences. All rights reserved.
3
Beyond the Screen: A Blueprint for Student Resilience?Essential Features in Mental Health Application
(Springer Science and Business Media Deutschland GmbH, 2024)
Baharum A.
;
Ismail R.
;
Abdul Rahim E.
;
Halamy S.
;
Mat Noor N.A.
;
Ramli N.A.
;
55916175500
;
36080877900
;
59333589000
;
57197830951
;
54791122900
;
57532878900
It is essential to have a mobile app with features that enhance mental health and well-being to promote improved mental health outcomes and make mental health resources available to students. This study aims to determine which mental health mobile app features students require for optimal mental health management. A questionnaire survey was distributed regarding mental health state in the previous and most recent months throughout the study and the primary and general features of mental health applications. In addition, an open-ended question was posed to provide further insight into students? required features. According to the findings, most students agreed with prior studies reviewed and proposed mental health mobile app features. Responses to the open-ended questions indicate that students desire apps with gamification elements, customizability, and high privacy. For better mental health management, a mobile app for mental health should be resourceful and exciting so that students continue to use it over the long term. This study will inform app designers and developers on how to develop a mobile app for mental health that is suitable for students. ? The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.
7
Biochar and syngas from wet torrefaction of oil palm empty fruit bunches and palm oil mill effluent: A renewable energy approach
(Institute of Physics, 2024)
Mohamad Aziz N.A.
;
Ling Y.K.
;
Mohamed H.
;
Zainal B.S.
;
Zaman H.B.
;
Alsultan A.G.
;
57222026676
;
59229914500
;
57136356100
;
57200914760
;
57226220128
;
57196716802
Palm oil mill effluent (POME) and oil palm empty fruit bunches (EFB) constitute the highest waste generated in the mill. This study investigates thermochemical approaches, specifically wet torrefaction and gasification, aiming to transform these wastes into higher-value products such as biochar. Wet torrefaction was initially applied to EFB and POME at 200 �C, with a heating rate of 5 �C/min for 30-min residence time under nitrogen-inert conditions, resulting in a solid yield of 82%. This process led to a notable increase in the heating value of raw EFB by 30.6%, from 17.3 to 22.6 MJ/kg. Subsequently, the product underwent gasification at various temperatures ranging from 600 to 800 �C, with a constant heating rate of 10 �C/min, gas flow rate of 20 ml/min, and a retention time of 30 min. The gasification reaction improved the solid yield and resulted in the generation of liquid products and syngas. The results indicated that 45-59% of biochar, 12-17% of bio-oil, and 30-39% of syngas were produced. The syngas composition, determined using gas chromatography, revealed the presence of CO2, H2, CH4, and CO. The solid product, characterised by a higher heating value, is a viable alternative for solid fuel. The findings suggested that both wet torrefaction and the gasification process have the potential to address the abundance of palm mill waste issues and offer an alternative approach for utilising and generating energy within the mill. ? Published under licence by IOP Publishing Ltd.
5
Challenges in Eye-Gaze Interaction Systems: A Survey
(Institute of Electrical and Electronics Engineers Inc., 2024)
Baharum A.
;
Ismail R.
;
Turumogan P.
;
Ismail I.
;
Noor N.A.M.
;
Deris F.D.
;
55916175500
;
36080877900
;
57208598614
;
57202772646
;
54791122900
;
56285335200
Eye-gaze, also referred to as eye tracking, enables users to control their computers or communication devices using their eyes as a mouse. Achieving accurate and precise eye-gaze positioning with low-cost devices is a crucial advancement in this field. This paper presents a survey of eye-gaze-based interaction systems, aiming to identify current techniques employed in this domain. Key issues related to eye-gaze-based interaction systems are discussed, along with the challenges they pose and potential future developments. Recent eye-gaze system review methods are also presented. Additionally, the paper provides a summary of research findings on eye-gaze methods, comparing the main phases of eye-gaze-based interaction. Over the past few years, researchers have proposed various methods and solutions to enhance the accuracy and performance of eye-gaze-based systems. These techniques find applications in diverse areas, such as virtual keyboard typing, immersive video technologies, virtual communication, assistive devices, screen control, effortless scrolling, and enriched reading experiences. Overall, eye-gaze-based interaction systems have the potential to enhance user-human experiences by identifying eye-gaze positions or points, thereby improving users' lifestyles and understanding of their machine. ? 2024 IEEE.
9
Characterization and Absorption Test of Cellulose from Oil Palm Empty Fruit Bunch for Potential Use in Oil Spill Clean-Up
(Springer Science and Business Media Deutschland GmbH, 2024)
Afandi N.F.
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Tan A.W.-Y.
;
Mariappan P.
;
Mahalingam S.
;
Manap A.
;
57189231851
;
56177750900
;
58985653200
;
55434075500
;
57200642155
Empty fruit bunch (EFB) is among the major agricultural waste from the oil palm industry, but its cellulose extract has the potential to clean up hazardous and large-scale oil spills. This research aims to extract cellulose from the oil palm empty fruit bunch fiber and study the water absorption rate of the cellulose. First, extraction processes were conducted using 15% sodium hydroxide (NaOH) and 10% hydrogen peroxide (H2O2). Then, the morphology of empty fruit bunch fiber, crystalline index, and phase identification was characterized using scanning electron microscopy (SEM), and X-Ray diffraction (XRD), respectively. The extracted cellulose was found to have a smaller diameter (8?50��m). Alkaline treatment assisted in the removal of hemicellulose, while bleaching aided in the removal of lignin and discoloration. As a result, the extracted cellulose showed a high crystalline index of 30.67%. Moreover, the water absorption rate of the extracted cellulose is calculated, and the maximum water absorption rate of the extracted cellulose was recorded at 269.50%. Hence, this research provides an efficient method for extracting cellulose from oil palm empty fruit bunch fiber and the highest yield of water absorption from the extracted cellulose, primarily used as aerogel in oil spill cleaning. ? The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.
8
Combined and Substituted Use of Battery Electric Vehicles and Hydrogen in Nanogrid Configurations
(Institute of Electrical and Electronics Engineers Inc., 2024)
Dahiru A.T.
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Tan C.W.
;
Lau K.Y.
;
Rosmin N.
;
Ibrahim O.
;
Toh C.L.
;
57211084199
;
35216732200
;
37665178700
;
36171008900
;
56888507100
;
8690228000
Renewable energy systems consider energy storage against uncertainties of weather resources and customer demands. Battery energy storage dominates recent renewable energy-based system developments. Factors for the battery dominance include the extended life-cycle, high energy density and low per unit kWh cost. However, hydrogen storage had a significant drop in per kWh cost and longer periods of energy storage. Electric vehicles have a high percentage of lifespan spent parking implying low energy storage usage. This paper investigates the technoeconomics of a residential nanogrid's energy storage system configured using battery, electric vehicles and hydrogen fuel cells. The Photovoltaic/Wind/Storage nanogrid configurations were optimized using nested integer linear programming with energy storage planned in combined and substituted modes for cost/capacity benefits. The nanogrid's energy costs in substituted storage were 44%, 22% and 39% in battery, electric vehicles and hydrogen storage lower than the combined storage's 0.0018 $/kWh. The substituted storages are 30%, 24% and 44% lower than the combined storage's $111,330 annualized total cost. However, hydrogen storage's 65 kW capacity is larger compared to electric vehicle's 55 kW and battery's 50 kW. Electric vehicles are envisaged to have better economic advantages under optimal load management. ? 2024 IEEE.
9
Comparative Analysis for Loss Control in Power Transmission System via Composite Compensation Scheme
(Institute of Electrical and Electronics Engineers Inc., 2024)
Ismail S.A.
;
Musirin I.
;
Mansor M.H.
;
Hamid Z.A.
;
Senthil Kumar A.V.
;
Abdullah A.
;
Jelani S.
;
57218371054
;
8620004100
;
56372667100
;
36559455000
;
56888921600
;
57197864035
;
57193388570
Loss minimization in power system is still relevant in power system community. Its presence may lead to overcompensation or under-compensation if no proper compensation strategy is properly planned, especially a reliable optimization technique. One important initiative to alleviate the transmission burden which meets the load demand can be rectified by composite compensation scheme. This paper proposed a composite compensation which integrates the multiunit of distributed generation (DG) and optimal reactive power dispatch (ORPD) which identifies the amount of reactive power to be dispatched by the generators in the system. In this study, a new and fast mutation technique is introduced to the original evolutionary programming (EP) optimization technique. It is termed Integrated Cloning Accelerated Mutation Evolutionary Programming (ICAMEP). ICAMEP was introduced to alleviate the weakness in the standalone EP and AIS which normally stuck as local optima. The study identifies optimal locations and sizes for composite compensation in the power transmission system, demonstrating its superiority over traditional EP and artificial immune systems (AIS). The impact of multi DGs installation, validated on IEEE 30-Bus Reliability Test System (RTS) was analyzed which can help the relevant utility to make future plan and decision. ? 2024 IEEE.
8
Comparative Analysis in DG Installation Scheme for Resilience Enhancement
(Institute of Electrical and Electronics Engineers Inc., 2024)
Zakaria F.B.
;
Musirin I.B.
;
Aminudin N.B.
;
Johari D.B.
;
Shaaya S.A.
;
Ibrahim N.F.B.
;
55646310800
;
8620004100
;
24733969500
;
24733632200
;
16022846200
;
55140240400
This paper presents a comparative analysis of the Distributed Generation (DG) scheme for resilience enhancement. This study models categories of hurricanes as disruptive events, considering data on the fragility of transmission towers concerning wind speeds. The simulation involves generating sustained winds corresponding to different categories of hurricanes, following the Saffir-Simpson Hurricane scale. The transmission power system will encounter power outages when the transmission tower collapses. The installation of DG is one of the suitable efforts to alleviate this phenomenon where it is used as a compensating device to improve power grid resilience. In this study, the Evolutionary Programming (EP) and Artificial Immune System (AIS) optimization techniques are used to determine sizing and strategic locations for the placement of multiple DG units for loss control in the power system. The resilience status of the system is also observed. The proposed optimization techniques are validated on the IEEE 30-Bus Reliability Test System (RTS) under varying loads. Verification was conducted through a comparison of optimization outcomes obtained from EP and AIS techniques. The findings illustrate the effectiveness of these algorithms in significantly reducing total loss and improving the resilience of the tested system. ? 2024 IEEE.
9
Comparison of Water Velocity of Physical and Numerical Modelling Analysis on a Downscale Spillway
(Springer Science and Business Media Deutschland GmbH, 2024)
Nurhikmah F.
;
Zawawi M.H.
;
Hassan N.H.
;
Zahari N.M.
;
57204810651
;
39162217600
;
57204683370
;
54891672300
The study on the effect of velocity on the spillway was done conducted using physical and numerical model analysis. The 1:40 scale physical model was developed, where the velocity was measured in fourteen measurements points for three different velocity flows. Numerical modelling was analysed using Computational Fluid Dynamic (CFD) to compare the accuracy of the physical model analysis. Results from the study indicate that the maximum percentage difference between the physical model and numerical analysis in velocity values do not exceed 10% for all three cases. Point Q3 shows the highest value of velocity with 0.036�m/s for the physical model and 0.039�m/s for numerical modelling. The percentage of difference at point Q3 for numerical modelling and the physical model result is 7.69%. Meanwhile, points P5 and S5 indicate the lowest value of velocity, where the physical model and numerical modelling shows the same which is 0.006�m/s. The percentage of difference at points P9 and S5 for numerical modelling and the physical model result is 0.00%. It can be concluded that the velocity flow is higher at the energy dissipater parts compared to the stilling basin area due to the dispersion of water flow along the spillway. ? The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd 2024.
7
Complementary Reflectance and Carbon Dots Fluorescence Imaging Using Endoscopic Scanner
(Institute of Electrical and Electronics Engineers Inc., 2024)
Leong Y.S.
;
Bakar M.H.A.
;
Mokhtar M.H.H.
;
Arsad N.
;
Zan M.S.D.
;
Bakar A.A.A.
;
57202929965
;
57373306400
;
16022476200
;
24723397100
;
24767242400
;
56926940300
Endoscopic imaging plays a crucial role in biomedical research, offering insights into biological structures and chemical processes. In this study, we present a fibre pair cantilever-based endoscopic scanner capable of employing confocal reflectance and carbon dots-based fluorescence imaging. Fluorescent microspheres were used to verify the fluorescence detection capability of the proposed scanner. Subsequently, a carbon dots-labelled sample was imaged and analysed. The results show that the confocal reflectance images capture the surface profile of the sample while the fluorescence images detect the emitted fluorescence signals. The findings show the complementary strength between confocal reflectance and carbon-dots based fluorescence modalities for precise localisation of fluorescence signals within the sample. The proposed endoscopic scanner shows the potential of multimodal endoscopic imaging for advancing biomedical research. ? 2024 IEEE.
4
Compressive Strength Development and Homogeneity of Concrete Incorporating Fly Ash and Used Engine Oil as Chemical Admixture
(Springer Science and Business Media Deutschland GmbH, 2024)
Saad S.A.
;
Jamaluddin A.N.
;
Masjuki S.A.
;
Husain N.M.
;
Hassan W.N.F.W.
;
Azahar W.N.A.W.
;
Kasim N.
;
Beddu S.
;
57190063308
;
57881729000
;
57205237952
;
36782412900
;
58825956300
;
56386164600
;
57194070344
;
55812080500
In this paper, the hardened properties of concrete with the utilization of waste materials of pulverized fly ash (PFA) and used engine oil (UEO) as chemical admixtures are conducted in order to improve concrete properties in terms of its compressive strength development and its homogeneity. Ordinary Portland cement (OPC) is replaced by PFA at the percentage of 20% and 40%, respectively. Meanwhile, UEO is added by the dosage of 0.15 and 0.3%, subsequently. Slump test was done for determination of rheological properties of fresh concrete. Compression test and ultrasonic pulse velocity (UPV) test are conducted to analyze the mechanical properties of hardened concrete and its homogeneity. Based on the non-destructive test, UPV test recorded the highest value with concrete sample of 20% PFA and 0.3% UEO of 4.19�km/s at 28�days, which demonstrate a high integrity of a concrete. For a destructive test, it also follows the same trend having concrete sample of 20% PFA and 0.3% UEO recorded the highest compressive strength which was at 42.74�MPa at 90�days. It can be concluded that, utilization of these waste materials improves properties of fresh concrete without much adverse effect on properties of hardened concrete. ? The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd 2024.
14
Computational Fluid Dynamic Analysis at Dam Spillway Due to Different Upstream Water Levels
(Springer Science and Business Media Deutschland GmbH, 2024)
Hassan N.H.
;
Kamarulbahrin S.Z.A.S.
;
Zawawi M.H.
;
Mazlan A.Z.A.
;
Abas M.A.
;
Zainol M.R.R.M.A.
;
Kamaruddin M.A.
;
57204683370
;
58805861600
;
39162217600
;
57216895962
;
56893346700
;
58601268100
;
44361188400
This paper analyses the fluid dynamic on the dam spillway structure when the water spilling event occurred. The parameters determined in this study are velocity and pressure. A 3D Computational Fluid Dynamics (CFD) model of the dam spillway structure and the fluid boundary condition was developed using FLUENT. The result of the CFD model shows that hydrostatic pressure for all water levels was observed at the upstream section. The highest velocity and pressure occur at the highest water level which are 3.2�m/s and 1.526�MPa, respectively, at the spillway wall. High water velocity may contribute to critical stress due to the high pressure. All of the cases from 146 to 153�m water level show the fluid flows which are at reasonable velocity and pressure at the spillway. However, the continuous interaction with water towards the granite may affect the scouring effect of the granite in the long-term run. ? The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd 2024.
13
Constructing a chaos proofing pre-development framework to manage chaos in a chaos-prone systems development environment
(2008)
Othman M.
;
Zin A.M.
;
Hamdan A.R.
;
24824928800
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When plans are disrupted to accommodate changes in a software development project, the environment becomes unstable. This brings about chaos. "Chaos" is real and we need to deal with it. This research is based on the premise that I. Chaos has a pattern, and that it is possible to learn this pattern and 2. If we are able to measure chaos, we will be able to better manage the situation brought by chaos. This paper put forth a list of chaos triggers based on findings from a case study of a chaos-prone system development project based in Malaysia. Lessons learned based on findings from a focus-group depth interview leads to the construction of a Pre Development Framework to chaos-proof system development environment. � 2008 IEEE.
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