Penyelenggaraan struktur penahan cerun rock shed: langkah mitigasi runtuhan tanah di Simpang Pulai - Blue Valley, Perak

Industri pembinaan merupakan industri yang sangat mencabar bukan sahaja di Malaysia malah di seluruh dunia yang merangkumi skop 3D dirty, difficult and dangerous. Industri ini juga meruapakan antara penyumbang terbesar KDNK iaitu sebanyak 7.4 peratus pada tahun 2016, walaupun industri ini antara penyumbang terbesar dari aspek keselamatan iaitu kemalangan (CIDB, 2017). Justeru itu, pihak yang bertanggungjawab seharusnya memandang serius mengenai masalah-masalah yang dihadapi supaya industri ini mampu bersaing di peringkat antarabangsa

Isu dan masalah sink hole terhadap penyelenggaraan jalan raya di Johor Bahru

Penyelenggaraan jalan adalah satu proses kerja-kerja yang terlibat bagi tujuan mengekalkan keadaan jalan seperti keadaan asalnya dari segi ciri-ciri geometri dan juga kekuatan strukurnya (Salleh, 2011). Selain itu, penyelenggaraan jalan merupakan kerja-kerja menjaga dan memperelokkan jalan dan bahagian-bahagian jalan yang telah siap dibina. Penyelenggaraan jalan juga melibatkan lain- lain struktur binaan yang terdapat pada jalan raya dan jalan yang mengalami kadar kerosakan yang bermula setelah siap dibina dan mula digunakan. Kerja-kerja penyelenggaraan dijalankan bagi mengawal kerosakan, menjamin jalan yang dibina boleh mencapai jangka hayat yang lama, menjaga jalan raya untuk kegunaan trafik dan memperbaiki perjalanan sistem trafik (JKR, 2009)

An overview of out-of-step protection in power systems

Power system is subjected to an extensive variety of little or bigger disturbance to the system during the operation. The power system that designed as one of the main requirement is to survive from the larger type of disturbances like faults. The power swing in certain system is the variation in three phase power flow in the power system. This paper mainly discussed the power swing and distance relay and the effect of the power swing on the distance relay and demonstrate about the basic power system stability and power swing phenomena. Moreover, out of step protection and detection applications are revised as well. At the end, the paper also demonstrated the past study of out of step application of TNB 275 KV network

The implementation of persuasive technology principles in mobile application development: a qualitative study

Preceding studies of persuasive technology have mentioned several benefits on the implementation of persuasive design features of the Persuasive System Design (PSD) model such as creating users' engagement and acceptance and continuous usage. However, available literatures have not sufficiently address the implementation of these design principles particularly in the context of mobile application development as compared to system development. Furthermore, there are low numbers of discussion that have relate the implementation of these design principles towards the achievement of the persuasive system developed. Hence, this study was conducted to qualitatively explore the way persuasive design principles were implemented as well as the mobile application development process followed in three different levels of mobile applications' attainments. Within this study, seven semi-structured interviews were conducted with the involvement of fifteen (15) Android mobile applications in the area of utilities category. These mobile applications were then categorized into successful, partially successful and less successful categories based on their numbers of mobile application downloaded for three consecutive years which is from 2013 until 2015. The results from the content analysis conducted have shown that the mobile applications of the successful category have implemented a lot more persuasive design principles as compared to the other two categories. Moreover, it is also found that all of the mobile applications of the category had follow a more detailed process of mobile application development with the emphasizing on product introduction to the users. A model of the implementation of persuasive design principles in mobile application development was then proposed based on the findings gained from this research. The results from this study have provided contribution to the body of knowledge by leveraging the domain of persuasive technology studies particularly in mobile application development

Pseudo-solidification of dredged marine soils with cement - fly ash for reuse in coastal development

The dislodged and removed sediments from the seabed, termed dredged marine soils, are generally classified as a waste material requiring special disposal procedures. This is due to the potential contamination risks of transporting and disposing the dredged soils, and the fact that the material is of poor engineering quality, unsuitable for usage as a conventional good soil in construction. Also, taking into account the incurred costs and risk exposure in transferring the material to the dump site, whether on land or offshore, it is intuitive to examine the possibilities of reusing the dredged soils, especially in coastal development where the transportation route would be of shorter distance between the dredged site and the construction location. Pseudo-solidification of soils is not a novel idea though, where hydraulic binders are injected and mixed with soils to improve the inherent engineering properties for better load bearing capacity. It is commonly used on land in areas with vast and deep deposits of soft, weak soils. However, to implement the technique on the displaced then replaced dredged soil would require careful study, as the material is far more poorly than their land counterparts, and that the deployment of equipment and workforce in a coastal environment is understandably more challenging. The paper illustrates the laboratory investigation of the improved engineering performance of dredged marine soil sample with cement and fly ash blend. Some key findings include optimum dosage of cement and fly ash mix to produce up to 30 times of small strain stiffness improvement, pre-yield settlement reduction of the treated soil unaffected by prolonged curing period, and damage of the cementitious bonds formed by the rather small dosage of admixtures in the soil post-yield. In short, the test results show a promising reuse potential of the otherwise discarded dredged marine soils

The Implementation of Energy Efficiency For Buildings In Algeria: A Perspective of Stakeholders

Abstract: The implementation of the building design provides the sustainability of the building and the environment. However, it offers many benefits to building owners and users to reduce maintenance costs and extend the service life, which is a feature of the building design. The intent of this research is to implement the energy efficiency for building constructions in Algerian perspective of stakeholders. There are two objectives in this study which are to investigate the challenges of building designs in achieving energy efficiency and to recommend the possible ways of investigation of building designs for energy efficiency. Besides the populations in this study are 210 architect firms but only 136 architect samples are selected according to the recommended Kerjie Morgan table for sampling. The quantitative approach is used in this study where samples distributed by set of questionnaire and analyzed by using Statistical Package for the Social Sciences 23.0 (SPSS 23.0). The result for this study is measured by average mean which is looking for the highest factor to the lowest factor. The highest factor is challenge of sustainability for energy efficiency in building design, followed by challenge of energy minimising consumption in building due to building services, third challenge of high cost of building design for energy analysis, the fourth is challenge of knowledge of energy efficiency during building design and the last factor is challenge of the high cost of energy efficiency in building. Eventually this study produced several recommendations for future research, there are stakeholders must use the natural resources in lighting and ventilation and also the electrical side in the building design. they have to aware about the high value of energy wasting, government must create a regulation for energy consumption in construction in order to control the energy use in buildings, Algerian government must support the implementation of energy efficiency in building design and provide training centre, workshop, conferences about the possibility of energy efficiency analysis to elaborate daylighting analysis, and energy analysis during the design stage. This recommendation is to improve the sustainability in energy efficiency for a better future for a better generation.   Keywords: Construction, sustainability, energy, efficiency, consumption, building desig

Penyelenggaraan dan faedah sistem penuaian air hujan (Spah)

Industri pembinaan memainkan peranan yang sangat penting dalam pertumbuhan ekonomi sesebuah negara. Ia membantu dalam meningkatkan kualiti hidup penduduknya dengan menyediakan infrastruktur sosioekonomi yang diperlukan seperti jalan raya, hospital, sekolah dan kemudahan asas lain. Bagaimanapun, tahap prestasi industri pembinaan di Malaysia dilihat tidak memuaskan, terutamanya dalam pembinaan projek awam. Industri pembinaan telah membawa banyak kesan negatif kepada alam sekitar. Inilah sebab mengapa teknologi hijau sangat digalakkan untuk digunakan dalam industri pembinaan untuk memberi persekitaran yang mampan. Oleh itu, kajian ini bertujuan untuk mengenal pasti penerapan teknologi hijau dan mengapa ia perlu digunakan dalam industri pembinaan

Synthesis of Construction Quality Assessment Model in Construction Industry

The achievement of quality is an important component in every handover of a residential project. Good quality plays an important role in creating a good identity for the developer as well as fulfill customer’s satisfaction level. Thus, Malaysian developers have started to implement quality assessment in their residential projects. Quality assessment is carried out to evaluate quality of project. However, even though quality assessment is implemented in most of construction projects, it is still a struggle to reach customer’s satisfaction level due to the number of defects in their residential properties. Therefore, this research carries the objective of investigate lacking of construction quality assessment and developing a framework on quality assessment to reduce defects in residential projects. This paper review requirements on construction quality assessment models which has been proposed by different researchers. The result of this study used to develop a framework on construction quality assessment to fulfil the important indicators which should be included in a quality assessment. The significance of this study may help contractors to develop projects with less defects and quality residential project

Estimation of the state of health (SOH) of batteries using discrete curvature feature extraction

Lithium battery applications in a variety of engineering sectors must be safe and reliable while maintaining a high level of energy efficiency. An accurate assessment of the battery's state of health (SOH) is critical in battery management systems (BMS). In recent years, it has been proved that machine learning is effective at estimating SOH. This work proposes a novel approach of health indicator (HI) extraction based on the U-chord curvature model, based on a complete analysis of battery aging data. In contrast to previous approaches for feature extraction, our method splits the discharge process into various phases based on the curvature of the discharge curve and extracts many HIs with a high correlation to battery SOH in the discharge platform stage of the discharge curve. To demonstrate the superiority of the proposed model, several well-known machine learning algorithms are employed to estimate SOH using extracted attributes. Long short-term memory (LSTM) and artificial neural networks (ANNs) are examples of these techniques. Accuracy, reliability, and robustness of the proposed model are evaluated using three publicly available data sets. According to the data, the model appears to be capable of accurately calculating the battery's SOH, with a mean absolute error of less than 1.08% and a root mean square error of less than 1.46% for various battery types

A hybrid SDS and WPT-IBBO-DNM based model for ultra-short term photovoltaic prediction

Accurate photovoltaic (PV) power prediction has been a subject of ongoing study in order to address grid stability concerns caused by PV output unpredictability and intermittency. This paper proposes an ultra-short-term hybrid photovoltaic power forecasting method based on a dendritic neural model (DNM) in this paper. This model is trained using improved biogeography-based optimization (IBBO), a technique that incor�porates a domestication operation to increase the performance of classical biogeography-based optimization (BBO). To be more precise, a similar day selection (SDS) technique is presented for selecting the training set, and wavelet packet transform (WPT) is used to divide the input data into many components. IBBO is then used to train DNM weights and thresholds for each component prediction. Finally, each component’s prediction results are stacked and reassembled. The suggested hybrid model is used to forecast PV power under various weather conditions using data from the Desert Knowledge Australia Solar Centre (DKASC) in Alice Springs. The simulation results indicate that the proposed hybrid SDS and WPT-IBBO-DNM model has the lowest error of any of the benchmark models and hence has the potential to considerably enhance the accuracy of solar power forecasting (PVPF)