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Initial Assessment on Feasibility of Remanufacturing Practice: Case of Air Conditioners
Full text linkAbstract- Due to the environmental regulations and economic viability, many industries show growing interest in the product recovery. Product recovery strategies (sometimes called end-of-life (EoL)) are recycling, remanufacturing, reuse, and refurbishment of components. Remanufacturing is a process that brings end-of-life product to its “like-new†conditions, the process recover product functions and quality, the remanufactured product is as its equivalent new with same warranty and less purchasing price. The price difference is associated with saving in energy, material and other resources recovered from the EoL product. The air-conditioning is the most energy consuming sector in Saudi Arabia (the geographical location of the study) where it consume 60-70% of the total residential energy. This study provide initial investigation and assessment of Business models for remanufacturing of window air-conditioner., a survey regarding the customer behavior has been conducted, it assesses how users deal with EoL Air-Conditioner, it also measures their perceptions about the remanufacturing process. Moreover, the paper describes the importance of remanufacturing in the context of reverse logistics. Results show that the cost structure is the driving force of conducting the remanufacturing of the air-conditioner.
Keywords: Remanufacturing; business model of remanufacturing; air conditioner
Detecting Attacks Using Big Data with Process Mining
Full text linkAbstract- In current digital world, Security has become the major issue for the organization. Every day the amount of data is growing in the world. Processing and analyzing of the data is becoming the new challenge for the analyzers. For this purpose, big data is useful to process the high volume of data in less time. Current security tools like existing firewalls and Intrusion Detection Systems are still not able to detect and prevent the attacks and intrusions in full proof manner and giving many false alarms. Big Data analytics concept could be very useful for analyzing, detection and providing full security to the organization because of the ability of handling the large amount of data. In this paper, we have described the concept and the roll of big data. We have also proposed a model using process mining to generate the alerts in the case of attacks.
Index Terms— Big Data, Process Mining, Intrusion Detection System, Logs
A Versatile Solar and Electric Water Distiller
Full text linkAbstract— The present paper discusses the feasibility and the features of a newly designed portable water desalinator/distiller. The goal is to design a small unit for desalinating or distilling brackish or soiled water. The proposed desalinator/distiller is a hybrid system that uses two sources of energy, namely: solar and electrical. It relies on solar energy when being used at locations where electricity is expensive or inaccessible. On the other hand, it uses electric energy when sunshine is unavailable for considerable periods of time, such as under rainy or cloudy skies, or during winter seasons when the sun radiation is weak or not enough to evaporate water. This innovative project is aimed to benefit communities in rural villages, long journey travelers in deserts and arid mountains, people living alongside polluted rivers and lakes, and people living in refugees’ camps. It can also benefit people with hard water supplies. The paper investigates and discusses the proposed hybrid desalinator/distiller (HDD). The work presented is based entirely on the work carried out by final year electrical engineering students, during their capstone design project. The project work, presented, is a manifestation of the students learning during previous semesters. It puts into practice the application of thermal and heat transfer principles, that the student learned in earlier courses.
Index Terms—Desalination,desalinator,distiller,solar still,solar energy
Hybrid Road Barrier Design As Aesthetic Safety Feature and Urban Furniture
Full text linkAbstract— There are various types of road barriers such as steel W beam, steel cable, concrete and wooden (timber) that have been used all over the World. They all have some advantages and disadvantages from different kinds of aspects such as construction time, ease of installation, low-cost, proven effectiveness, impact resistance, durability, service life, maintenance, etc. but to attain a more pleasant drive especially in historical and natural urban roads or scenic highways, installing wooden (timber) barriers can be considered as a more aesthetically pleasing alternative. In addition to aesthetic, wooden barriers can be preferred for their impact energy and sound absorption capabilities especially in urban roads. With the design, it is also estimated that light effect of oncoming traffic will be blocked. The main idea is to use hybrid barriers for both aesthetic safety feature in scenic or historical roads and urban furniture. This paper also summarizes comparisons among conventional road barrier systems considering the European standard EN 1317, Road Restraint Systems and provides a discussion of future designs.
Index Terms—road restraint system, timber barrier, hybrid barrier, road barrier, urban furnitur
Effects of Polymer Adsorption and Desorption on Polymer Flooding in Waterflooded Reservoir
Full text linkPolymer Flooding is one of the most well-known methods in Enhanced Oil Recovery (EOR) technology, resulting in favorable conditions for displacement mechanism to lower residual oil in the reservoir. Polymers can lower mobility ratio by increasing the viscosity of injected water, hereby increasing volumetric sweep efficiency. Moreover, polymer adsorption onto the rock surface can help decrease reservoir permeability contrast. Due to absolute permeability reduction, the effective permeability to water is also reduced. Once the polymer is adsorbed onto the rock surface, polymer molecules can be desorbed with a chaser. This study is performed to further evaluate the effects of the adsorption and desorption process of polymer solutions to yield benefits on the oil recovery mechanism. A reservoir model is constructed by the reservoir simulation program called STAR® from Computer Modeling Group (CMG). Various polymer concentrations, starting times of polymer flooding process and polymer injection rates were evaluated with selected degrees of polymer desorption including 0, 50 and 100%. According to the results, polymer desorption lowers polymer consumption, especially at low concentrations. Polymer desorption causes polymer re-employment that is previously adsorbed onto rock surface, resulting in an increase of sweep efficiency in the further period of polymer flooding process. Furthermore, the results show that waterflooding followed by earlier polymer flooding can increase the oil recovery factor whereas the higher injection rate also enhances the recovery. Polymer concentration has relationship with polymer consumption due to the two main benefits described above. Therefore, polymer slug size should be optimized based on polymer concentration
Molecular Confirmation on the Synonymy of Phaeanthusebracteolatusand P Ophthalmicusincluding Biological Activities of Its Phytochemical Constituent
Full text linkThe genus Phaeanthus Hook.f and Thomson of the family Annonaceae is a medicinal plant essentially characterized by inner petals that are longer than outer petals, numerous carpels and stamens, and monocarpous fruits. Previous studies have recognized Phaeanthus ebracteolatus as a synonym of P. ophthalmicus based on the morphological examination of limited herbarium specimens. In order to determine the validity of the finding, this study aims to verify the synonymy of P. ebracteolatusand P. ophthalmicus using combined matK and rbcL dataset, as well as computing its sequence divergence; and, to further explore the phytochemical and biochemical components of the plant.Collected plant samples were subjected to morphological characterization followed by molecular analysis through DNA extraction, amplification, purification, sequencing, sequence analysis and data analysis. The crude leaf extracts were subjected to phytochemical screening by thin layer chromatography and three colorimetric assays such as α-glucosidase inhibition, anti-tyrosinase and anti-Staphylococcus. This study confirms that the two Phaeanthus species are conspecific using combined matK and rbcL dataset which is strongly supported and computed sequence divergence which includes 5 bp (0.81%) and 3 bp (0.41%) in matK and rbcL regions, respectively. Overlapping morphological characters such as axillary inflorescence, valvate inner and outer petals, truncate stamens, club-shaped carpels, and globose monocarps also support the finding. The crude leaf extract yields positive to different antioxidant constituents and demonstrated a high potency in α-glucosidase inhibition. The study validated the synonymy of P. ebracteolatus and P. ophthalmicus using sequences and morphology, with P. ophthalmicus being acknowledged as its correct name. Furthermore, the plant extracts proved to be efficient as an α-glucosidase inhibitor
A Transportable Solar Power Generator
Full text linkThis paper presents the design of a 2kW portable photovoltaic (PV) stand-alone facility (PV generator) that converts directly solar irradiance into electricity for immediate use or storage. The project aims to build a stand-alone solar power source for use in rural villages, mountainous and remote areas that are distant from the national grid. It can also be very useful for powering camping tents, fishing boats, small farms, and greenhouses. Equally, it could be used for disaster stricken areas and during power outages. However, the proposed generator will be more suited for camping trips that Emiratis take almost in weekly basis. The paper will focus on presenting the main features of the designed prototype. It will also investigate the performance of the proposed stand-alone PV generator. Parameters investigated include geographic location, climate condition, solar irradiance, load consumption, ambient temperature, array voltage, battery voltage, and energy output from the array. The work presented is based entirely on the work carried out by final year electrical engineering students, during their capstone design project. The project work, presented, is a manifestation of the students learning during earlier semesters. It puts into practice the application of solar energy technology, that the student learned in his course on renewable energy systems
Comparative Content of Harmful Substances Contained In the Raw Material for Various Types of Printing Ink
Full text linkPrinting ink is one of the chemical industry that can be considered as a high risk industry due to it is a manufacture industry that involved all kinds of chemical materials. Thus, reliability data is important for the environmental safety in chemical industries. This study aims to compare the hazardous substances in raw materials for various printing ink production and propose the control measures in the ink production process. Three types of printing ink raw material i.e sheet-fed ink, cold-set ink and heat-set ink were considered in this study. This study was conducted by using a quantitative approaches. Data were collected through Material Safety Data Sheet (MSDS). Hazardous substances were identified from the Chemical Abstract Service (CAS) registry number of the raw materials. The result of the study shown that there are eight hazardous chemical substances in sheet-fed ink, cold-set ink and heat-set ink. The hazardous raw materials identified are mainly from the category of pigment, solvents and additives. From the study of the three types of ink printing, sheet-fed inks contain harmful chemicals that are the lowest of 33.27%, followed by thermal ink-set of 41.73% and cold-set inks of 61.86%. The results also shown that solvents are identified to contribute highest percentage as hazardous chemical substances in the printing ink, followed by additives and pigment. The results of the research shown that the production workers in the printing ink production process are at highly exposed to the hazards. The hierarchy of hazard control based on Department Occupational Safety and Health (DOSH) are proposed to control the hazardous chemical substances. The recommended control measures of possible hazards and risks based on the work activities are elimination, engineering control, administration control and personal protective equipment. This research is very important as it will enhance the precautions and safety knowledge of the employer and employee in handling the chemical substances in the printing ink production process
Experimental Researches in Tourism - A Bibliometric Analysis
Full text linkThe aim of the study is to reveal the empirical trends in the tourism literature by analyzing the experimental researches carried out in the field of tourism in terms of bibliometric. The research data comprise 648 studies published “empirical†and “experimental†topic title between 1982-2017 in the top five tourism journals according to the Journal Citation Reports which are Tourism Management(TM), Journal of Travel Research(JTR), Journal of Sustainable Tourism(JST), Cornell Hospitality Quarterly(CHQ) and Annals of Tourism Research(ATR) indexed in "Hospitality, Leisure, Sport and Tourism" research area. The journals are examined in terms of publication numbers by years, country cooperations, common publication citation networks and topic orientations. Social network analysis has been used to determine the country collaborations, common publication citation networks and topic orientations. According to the results obtained in the study; %92,1 of publications were published after 2000. 58.5% of the publications were published between 2011 and 2017. USA and Spain have an important role in country cooperations. “Multivariate Data Analysis†written by Joseph F. Hair, Jr et al. in 2010 is the most basic reference source that guides the studies. This book was effective especially in the period between 2014 and 2017. Behavioral intention, strategic planning researches and environmental innovation are the most studied topics
Classification of Fake Product Ratings Using a Timeline Based Approach
Full text link Abstract— Detection of fake review and reviewers is currently a challenging problem in cyber space. It is challenging primarily due to the dynamic nature of the methodology used to fake the review. There are several aspects to be considered when analyzing reviews to classify them effective into genuine and fake. Sentiment analysis, opinion mining and intend mining are fields of research that try to accomplish the goal through Natural Language Processing of the text content of the review. In this paper, an approach that uses the review ratings evaluated along a timeline is presented. An Amazon dataset comprising of ratings indicated for a wide range of products was used for the analysis presented here. The analysis of the ratings was carried out for an electronic product over a period of six years. The computed average rating helps to identify linear classifiers that define solution boundaries within the dataspace. This enables a product specific classification of review ratings and suitable recommendations can also be generated automatically. The paper explains a methodology to evaluate the average product ratings over time and presents the research outcomes using a novel classification tool. The proposed approach helps to determine the optimal point to distinguish between fake and genuine ratings for each product.
Index Terms: Fake reviews, Fake Ratings, Product Ratings, Online Shopping, Amazon Dataset