•Journal•ISSN: 1018-3639
Journal of King Saud University: Engineering Sciences
Elsevier BV
About: Journal of King Saud University: Engineering Sciences is an academic journal published by Elsevier BV. The journal publishes majorly in the area(s): Materials science & Ultimate tensile strength. It has an ISSN identifier of 1018-3639. It is also open access. Over the lifetime, 988 publications have been published receiving 13791 citations. The journal is also known as: Journal of King Saud University. Engineering sciences.
Topics: Materials science, Ultimate tensile strength, Compressive strength, Composite material, Flexural strength
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TL;DR: This paper presents a survey on the sentiment analysis challenges relevant to their approaches and techniques, and presents a summary of current techniques and approaches used for sentiment analysis.
Abstract: With accelerated evolution of the internet as websites, social networks, blogs, online portals, reviews, opinions, recommendations, ratings, and feedback are generated by writers. This writer generated sentiment content can be about books, people, hotels, products, research, events, etc. These sentiments become very beneficial for businesses, governments, and individuals. While this content is meant to be useful, a bulk of this writer generated content require using the text mining techniques and sentiment analysis. But there are several challenges facing the sentiment analysis and evaluation process. These challenges become obstacles in analyzing the accurate meaning of sentiments and detecting the suitable sentiment polarity. Sentiment analysis is the practice of applying natural language processing and text analysis techniques to identify and extract subjective information from text. This paper presents a survey on the sentiment analysis challenges relevant to their approaches and techniques.
437 citations
TL;DR: In this paper, the authors proved that the cost of solar energy will be less than that of fossil fuel energy if the costs of the environmental and health damages are taken into account.
Abstract: The continued rise of electricity demand in Saudi Arabia means that power generation must expand. Conventional generation is a major cause of environmental pollution and negatively impacts human health through greenhouse gas emissions. It is therefore essential that an alternative method of generation is found that preserves the environment and health and would support existing conventional generation during peak hours. Saudi Arabia is geographically suitable because it is located in the so-called sun belt, which has led it to become one of the largest solar energy producers. Solar energy is a serious competitor to conventional generation when the indirect costs of fossil fuels are included. Thus, processing sunlight via photovoltaic cells is an important method of generating clean energy. This article proves that the cost of solar energy will be less than the cost of fossil fuel energy if the cost of the environmental and health damages is taken into account.
159 citations
TL;DR: In this article, a survey questionnaire was conducted on a randomly selected sample of large construction firms in Saudi Arabia to identify a set of KPIs that can be implemented by construction executives in measuring the performance at the company level.
Abstract: Slow economic growth, high competition, and construction industry restructuring have put a strong pressure on construction companies to continually improve their productivity and performance. Many studies on performance measurement have been carried out at the project level. However, recently, the demand for performance evaluation and management at the company level has increased. This paper aims to identify a set of KPIs that can be implemented by construction executives in measuring the performance at the company level in Saudi Arabia. List of 47 potential performance indicators have been identified through the literature review. A survey questionnaire was conducted on a randomly selected sample of large construction firms in Saudi Arabia. The statistical analysis of the collected responses was provided in 10 significant KPIs. Findings indicate that the traditional financial measures can no more be the sole determinant of firm success. Other performance indicators such as external customer satisfaction, safety, business efficiency, and effectiveness of planning are increasingly becoming important. The results of the study is a set of KPIs that are useful as a first step in developing a national benchmarking system for enhancing the performance of construction firms in the Kingdom of Saudi Arabia.
131 citations
TL;DR: In this paper, a new brake pad produced using banana peel waste to replace asbestos and Phenolic resin (phenol formaldehyde), as a binder was investigated, and the results showed that compressive strength, hardness and specific gravity of the produced samples were seen to be increasing with an increase in wt% of resin addition, while oil soak, water soak, wear rate and percentage charred decreased as the wt % of resin increased.
Abstract: The use of asbestos fibre is being avoided due to its carcinogenic nature that might cause health risks. A new brake pad produced using banana peel waste to replace asbestos and Phenolic resin (phenol formaldehyde), as a binder was investigated. The resin was varying from 5 to 30 wt% with an interval of 5 wt%. Morphology, physical, mechanical and wear properties of the brake pad were studied. The results show that compressive strength, hardness and specific gravity of the produced samples were seen to be increasing with an increase in wt% of resin addition, while oil soak, water soak, wear rate and percentage charred decreased as the wt% of resin increased. Overall samples, containing 25 wt% in uncarbonized banana peels (BUNCp) and 30 wt% in carbonized (BCp) gave better properties. The result of this research indicates that banana peel particles can be effectively used as a replacement for asbestos in brake pad manufacture.
130 citations
TL;DR: In this article, the effects of eggshell particles (ES) on the microstructures and properties of Al-Cu-Mg/ES particulate composites have been studied, where a total of 2-12.% ES particles were added.
Abstract: The effects of eggshell particles (ES) on the microstructures and properties of Al–Cu–Mg/ES particulate composites have been studied. A total of 2–12 wt.% ES particles were added. The microstructures of the Al–Cu–Mg/eggshell particulate composites produced were examined by a scanning electron microscope with energy dispersive spectrometer (SEM/EDS). The physical and mechanical properties measured included: density, tensile strength, hardness values and impact energy. The results revealed that the tensile strength increased by 8.16% at 12 wt.% uncarbonized ES and 14.28% at 12 wt.% carbonized ES, the hardness values increased by 10.01% at 12 wt.% uncarbonized ES and 25.4% at 12 wt.% carbonized ES with decrease in the density by 6.50% at 12 wt.% uncarbonized ES and 7.4% at 12 wt.% carbonized ES. The impact energy decreased by 23.5% at 12 wt.% uncarbonized ES and 24.67% at 12 wt.% carbonized ES particles, respectively. These increases in strength and hardness values are attributed to the distribution of hard phases of the ES particles in the ductile Al–Cu–Mg alloy matrix. These results showed that using the carbonized eggshell as reinforcement in the Al–Cu–Mg alloy gives better physical and mechanical properties as compared to uncarbonized ES particles. Hence addition of ES particles upto 12 wt.% can be used as a low cost reinforcement for the production of metal matrix composites for engineering applications.
129 citations