International Journal of Engineering Science Technologies最新文献

{"title":"VALIDATION OF LEAD (Pb) ANALYSIS METHOD IN FISH MEAL MATRIX BY ELECTROTHERMAL ATOMIC ABSORPTION SPECTROPHOTOMETRY","authors":"Suwari, S. M. Ledoh, P. Rozari","doi":"10.29121/ijoest.v5.i5.2021.215","DOIUrl":"https://doi.org/10.29121/ijoest.v5.i5.2021.215","url":null,"abstract":"ABSTRACT \u0000Validation of analytical methods is the process of proving that the methods used are scientifically good and suitable for certain purposes. The aim of this study was to validate the analytical method of lead in fish meal matrix by electrothermal atomic absorption spectroscopy (ETAAS) using a phosphate modifier. The research begins with optimization of the analytical conditions that include pyrolysis (ashing) and atomizing temperature, and continues with the validation process by evaluating the analytical performance parameters using a certified reference material (CRM). Method validation was carried out by determining the level of accuracy and precision as well as lead content in a CRM Cod Muscle-422 from BCR. Each experiment was conducted at a wavelength of 283.3 nm, a lamp current of 9.0 amperes, a slit width of 1.3 nm and an argon carrier gas. The optimal pyrolysis and atomizing temperature of lead obtained by adding phosphate modifier was 650 oC and 2000 oC, respectively. The results obtained in this study indicate that the ETAAS lead analysis method using a phosphate modifier is feasible as a test method with an RSD of 3.79%, precision of 0.0043, relative error of 4.0%, accuracy of 104% and recovery of 98% ± 3%. The results of the validation method obtained that the 95% confidence interval for Pb content was 0.088 ± 0.023 µg/g, still within the range of Pb levels in the certificate, namely 0.085 ± 0.015 µg/g of Pb. \u0000Keywords: Validation, CRM, Cod Muscle, ETAAS, Lead","PeriodicalId":331301,"journal":{"name":"International Journal of Engineering Science Technologies","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115409046","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"APPLICATIONS OF TRAVELING SALESMAN PROBLEM ON THE OPTIMAL SIGHTSEEING ORDERS OF MACAO WORLD HERITAGE SITES WITH REAL TIME OR DISTANCE VALUES BETWEEN EVERY PAIR OF SITES","authors":"Kin Neng Tong, Iat In Fong, Inge Li, Chi Him Anthony Cheng, Soi Chak Choi, Hau Xiang Ye, W. Lee","doi":"10.29121/ijoest.v5.i5.2021.220","DOIUrl":"https://doi.org/10.29121/ijoest.v5.i5.2021.220","url":null,"abstract":"The optimal route of sightseeing orders for visiting every Macao World Heritage Site at exactly once was calculated with Simulated Annealing and Metropolis Algorithm (SAMA) after considering real required time or traveling distance between pairs of sites by either driving a car, taking a bus, or on foot. We found out that, with the optimal tour path, it took roughly 78 minutes for driving a car, 115 minutes on foot, while 117 minutes for taking a bus. On the other hand, the optimal total distance for driving a car would be 13.918 km while for pedestrians to walk, 7.844 km. These results probably mean that there is large space for the improvement on public transportation in this city. Comparison of computation time demanded between the brute- force enumeration of all possible paths and SAMA was also presented, together with animation of the processes for the algorithm to find out the optimal route. It is expected that computation time is astronomically increasing for the brute-force enumeration with more number of sites, while it only takes SAMA much less order of magnitude in time to calculate the optimal solution for larger number of sites. Several optimal options of routes were also provided in each transportation method. However, it is possible that in some types of transportation there could be only one optimal route having no circular or mirrored duplicates.","PeriodicalId":331301,"journal":{"name":"International Journal of Engineering Science Technologies","volume":"4 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131692513","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A CONCEPTUAL APPROACH TO MANAGING THE PROCESS OF TRANSITION OF ORGANIZATIONS TO WORK IN THE CONDITIONS OF THE EIGHTH TECHNOLOGICAL ORDER","authors":"V. Glushchenko","doi":"10.29121/ijoest.v5.i4.2021.211","DOIUrl":"https://doi.org/10.29121/ijoest.v5.i4.2021.211","url":null,"abstract":"The subject of the article is the development of a concept for the transition of organizations to the eighth technological mode; the object of the article is the eighth technological mode; the purpose of the work is to increase the efficiency of the processes of transition of organizations to the eighth technological mode; to achieve this goal, the following tasks are solved: the geopolitical and socio-economic roles and results of the transition of organizations to the eighth technological mode are described; a system analysis of technological modes is carried out (tables of elements and properties of technological modes are developed); - development and description of practical tasks of the policy of transition of organizations to the eighth technological order; the structure of the policy and the content of the elements of the policy of transition to the eighth technological order are described; the criteria for evaluating the effectiveness of the policy of transition of organizations to the eighth technological order are given; the scientific methods of this article are system, historical, logical and comparative analysis, heuristic synthesis, political science, system approach, heuristic forecasting, expert methods, efficiency theory; the scientific novelty of the work is determined by the synthesis of the policy of transition of organizations to the eighth technological order, the formation of a set of criteria for assessing the geopolitical and socio-economic effectiveness of the policy of organizations for the transition to the eighth technological order","PeriodicalId":331301,"journal":{"name":"International Journal of Engineering Science Technologies","volume":"132 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114827997","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"THE MISSION AND ESSENCE OF THE THEORY OF TECHNOLOGICAL ORDERS","authors":"V. Glushchenko","doi":"10.29121/IJOEST.V5.I4.2021.205","DOIUrl":"https://doi.org/10.29121/IJOEST.V5.I4.2021.205","url":null,"abstract":"Abstract: the subject of the article is the mission and essence of the theory of technological orders; the object of the article is the process of technological development of the economy and society; the purpose of the work is to increase the efficiency of the processes of formation of the sixth technological structure in the economy and society.; description of the methods of modernization of enterprises ' products during the transition to the sixth technological mode; description of the scientific and practical significance of the general theory of technological modes; scientific methods in this article are the methodology and philosophy of science, logic, system analysis, synthesis, system approach, functional-decomposition representation of complex technological systems, forecasting, expert methods; scientific novelty of the work is associated with the development of the methodology of the general theory of technological modes and the description of the scientific and practical significance of this general theory.","PeriodicalId":331301,"journal":{"name":"International Journal of Engineering Science Technologies","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114876927","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"COMPARISON OF THREE OPTION PRICING MODELS FOR INDIAN OPTIONS MARKET","authors":"A. Chauhan, Ravi Gor","doi":"10.29121/ijoest.v5.i4.2021.203","DOIUrl":"https://doi.org/10.29121/ijoest.v5.i4.2021.203","url":null,"abstract":"\u0000 \u0000Black-Scholes option pricing model is used to decide theoretical price of different Options contracts in many stock markets in the world. In can find many generalizations of BS model by modifying some assumptions of classical BS model. In this paper we compared two such modified Black-Scholes models with classical Black-Scholes model only for Indian option contracts. We have selected stock options form 5 different sectors of Indian stock market. Then we have found call and put option prices for 22 stocks listed on National Stock Exchange by all three option pricing models. Finally, we have compared option prices for all three models and decided the best model for Indian Options. \u0000Motivation/Background: \u0000In 1973, two economists, Fischer Black, Myron and Robert Merton derived a closed form formula for finding value of financial options. For this discovery, they got a Nobel prize in Economic science in 1997. Afterwards, many researchers have found some limitations of Black-Scholes model. To overcome these limitations, there are many generalizations of Black-Scholes model available in literature. Also, there are very limited study available for comparison of generalized Black-Scholes models in context of Indian stock market. For these reasons we have done this study of comparison of two generalized BS models with classical BS model for Indian Stock market. \u0000Method: \u0000First, we have selected top 5 sectors of Indian stock market. Then from these sectors, we have picked total 22 stocks for which we want to compare three option pricing models. Then we have collected essential data like, current stock price, strike price, expiration time, rate of interest, etc. for computing the theoretical price of options by using three different option pricing formulas. After finding price of options by using all three models, finally we compared these theoretical option price with market price of respected stock options and decided that which theoretical price has less RMSE error among all three model prices. \u0000Result: \u0000After going through the method described above, we found that the generalized Black-Scholes model with modified distribution has minimum RMSE errors than other two models, one is classical Black-Scholes model and other is Generalized Black-Scholes model with modified interest rate. \u0000 \u0000","PeriodicalId":331301,"journal":{"name":"International Journal of Engineering Science Technologies","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125564628","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"OPTIMIZATION OF ADSORPTION OF Pb (II) AND Cr (VI) FROM AQUEOUS SOLUTION USING MODIFIED FELDSPAR COMPOSITE: ISOTHERM AND KINETIC STUDIES","authors":"K. A. Sanusi, Yakubu Yahaya, M. M. Ambrusa, Yakubu Yahaya, A. M. Hammed","doi":"10.29121/ijoest.v5.i4.2021.200","DOIUrl":"https://doi.org/10.29121/ijoest.v5.i4.2021.200","url":null,"abstract":" In this study modified feldspar composite (MFC) adsorbent based on feldspar and Theobroma cacao podas (TCP) was prepared, characterized and utilized for adsorption of Pb (II) and Cr (VI) in aqueous solution. The results showed that the cation exchange capacity of the modified feldspar composite (30.66 ± 0.21 meq/100 g) was 5 times higher than that of raw feldspar (6.42 ± 0.45 meq/100g). More so, the novel biohybrid material, MFC has a surface area of 53.60 ± 0.3 m2/g and particle size of 105.4 ± 0.18. X-ray diffraction peaks revealed that after the modification process, there is only slight shift in the position of some diffraction peaks of feldspar and the composite material suggestive of the retention of the crystalline properties of the feldspar in the novel composite (MFC). Infrared spectroscopy (FTIR) spectra showed that some functional groups present in the two starting materials were also available on the surface of the composite (MFC) indicating that the intercalation of TCP biomass into feldspar surface was successful. Response surface methodology (RSM) via a five-levels central composite design (CCD) was applied for optimization of  metal adsorption onto the adsorbent in 32 experiment runs considering the effect of pH, adsorbent dose, adsorbate concentration and contact time. Optimization results showed that the predicted and experimental values of Pb (14.021, 14.148 mg/g) and Cr (3.428, 3.504 mg/g) were close at the optimum condition of (pH 2, 5, 6; 0.5 g; 100 mg/L; 60-120 min and 3000K). Results of ANOVA analysis revealed the adequacy of the model with the good correlation between R2 values (0.9916-0.9998) and adjusted R2 (0.9919-0.9986) and F value of (≥ 147). Results showed that Pb (II) ions adsorption onto the adsorbents was well fitted to the Langmuir isotherm model while the Cr (VI) ions uptake onto FS and MFC adsorbents followed Freundlich isotherm model. The results of the kinetic studies showed that rate of Pb (II) removal followed pseudo second order model while the rate of adsorption of Cr (VI) onto the FS and MFC adsorbents best fitted pseudo first order model. Owing to its improved cation exchange capacity and eco-friendliness, the modified feldspar composite have a good potential application in wastewater treatment besides other industrial explorations.","PeriodicalId":331301,"journal":{"name":"International Journal of Engineering Science Technologies","volume":"192 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131493059","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"ROLE OF ORGANIZATIONAL STRUCTURE ON CONSTRUCTION WASTE MANAGEMENT AMONG KUANTAN MALAYSIAN CONSTRUCTION INDUSTRIES","authors":"F. Kamarosisam, A. Adeleke, T. T. Taiwo","doi":"10.29121/ijoest.v5.i3.2021.199","DOIUrl":"https://doi.org/10.29121/ijoest.v5.i3.2021.199","url":null,"abstract":"The construction industry is one of the sectors contributing to the Malaysian economy and is regarded as an important component of the Malaysian economy. At the same time, as the number of building projects rises, the amount of waste created by building projects also increases, which also has many negative effects on the environment and public health. To reduce the amount of waste created by construction projects, waste must be properly handled and effective practices in the management of construction waste must be implemented in all construction industries. This research paper aims to answer these problems above in order to: 1) to investigate the relationship between formalization structure and construction waste management in Pahang construction industries; and 2) to investigate the relationship between centralization structure and construction waste management in Pahang construction industries. Data were obtained from 107 respondents among construction companies in Pahang. The PLS-SEM technique was used to test both the measurement and structural models in this analysis. The outcome shows that there is an important connection between the formalization structure and the management of construction waste among the construction companies operating in Pahang. The structure of centralization and waste management for construction was also found to be positively associated in this study.","PeriodicalId":331301,"journal":{"name":"International Journal of Engineering Science Technologies","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126895068","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"INFLUENCE OF REWARDING AND PUNISHING ON PROJECT SUCCESS AMONG KUANTAN MALAYSIAN CONSTRUCTION INDUSTRIES","authors":"A. Adeleke, S. Aziz","doi":"10.29121/ijoest.v5.i3.2021.198","DOIUrl":"https://doi.org/10.29121/ijoest.v5.i3.2021.198","url":null,"abstract":"In project-based organizations, studies into the role of leadership have usually concentrated on project managers or top management but less on leaders who coordinate several projects in order to improve project performance. This study, therefore, examines the role of leadership behaviors (e.g. reward and punishment) on project success among Kuantan, Malaysian construction industries. Using a questionnaire survey, the data were collected from 107 respondents among Kuantan construction companies. PLS-SEM techniques were used in this research to assess both the measurement and structural models. The study found a positive and significant relationship between leadership behaviors measures with reward and punishment on project success in Kuantan, Malaysia. The study reinforces the relevance of leadership behaviours in improving project success and also highlights the necessity for project-based organizations to enhance their performance. ","PeriodicalId":331301,"journal":{"name":"International Journal of Engineering Science Technologies","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127441844","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"SOCIOLOGICAL AND STATISTICAL ANALYSIS BASED ON SURVEY AT THE YEREVAN AMERICAN CORNER","authors":"G. Petrosyan, Artur Tadevosyan","doi":"10.29121/ijoest.v4.i6.2020.130","DOIUrl":"https://doi.org/10.29121/ijoest.v4.i6.2020.130","url":null,"abstract":"Rapid social, economic, technological changes in the country leave their mark on each member of the society; alter their tastes, expectations, and needs. The visitors of the Yerevan American Corner are not an exception.  Thus, a necessity of a detailed analysis of the visitors’ demands and behavior arises, in order to amend or expand the realm of the service, to raise the popularity of the corner and to attract more visitors. With this purpose, we offer to conduct polls and interviews among users of the American Corner, to do a specific social analysis of programs and services. Overall, 550 people will take part in the survey.  The analyses will help to understand the attitude of patrons, non-patrons and random visitors towards the Yerevan American Corner (its space, resources, activities, projects, services, technical devices, and staff). This will also help to evaluate the effectiveness of current activities and services, such as clubs, courses, public talks and various meetings.     ","PeriodicalId":331301,"journal":{"name":"International Journal of Engineering Science Technologies","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128713059","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The INFLUENCE OF MECHANICAL AND PHYSICAL PROPERTIES OF PALM NUT SHELL- PLASTIC COMPOSITE","authors":"Reneta Nafu Yakum, Wannyuy Kingsly Mofor, Ngwe Nnoko Ngaaje","doi":"10.29121/ijoest.v4.i6.2020.128","DOIUrl":"https://doi.org/10.29121/ijoest.v4.i6.2020.128","url":null,"abstract":"Increasing population levels, booming economy and rapid urbanization have greatly accelerated the municipal solid waste (MSW) in our country; in our cities (Bamenda, Buea, Douala, Yaoundé etc.), poor management of solid waste constitutes an urgent problem: flood, deterioration of the urban environment in the form of air, water, and land pollution. Options like recycling and material recovery for subsequent re-use present enormous opportunities for waste management with economic and ecological benefits, wastes as well as plastic and palm nut shell have not yet been recycled satisfactorily; the performances of palm nut shell-plastic composites of 30% palm kernel shell with particle sizes varying from 1mm to 5mm and 70% of polyethylene were used to produce different samples The effects of palm kernel shell particles’ size on mechanical and physical properties of the new composite were studied by the help of different mechanical (flexural and compressive test) and physical tests (density and water absorption). Results showed a better interaction of polyethylene and palm kernel shell particles at 1mm sieve with compressive stress and water absorption higher at 1mm, ultimate flexural stress and the young’s modulus of the material increased as the particle size of the palm kernel shell increased, relatively higher density were obtained at 3mm of the palm kernel shell (PKS) size. \u0000  \u0000 ","PeriodicalId":331301,"journal":{"name":"International Journal of Engineering Science Technologies","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122229318","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}