European Journal of Engineering Research and Science最新文献

Experimental Study of Twin Connected Pipe Jets 双连接管射流的实验研究

European Journal of Engineering Research and Science Pub Date : 2020-12-30 DOI: 10.24018/ejers.2020.5.12.2314

S. Sourav, Ashraful Hossain Rifat, Muhammed Hasnain Kabir Nayeem, Md. Abu. Taher Ali

引用次数: 0

Introducing Secondary Education Students to Programming through Sound Alerts 透过声音提醒向中学学生介绍程式设计

European Journal of Engineering Research and Science Pub Date : 2020-12-30 DOI: 10.24018/ejers.2020.5.12.2298

Theofani S. Sklirou, Areti Andreopoulou, A. Georgaki, N. Tselikas

{"title":"Introducing Secondary Education Students to Programming through Sound Alerts","authors":"Theofani S. Sklirou, Areti Andreopoulou, A. Georgaki, N. Tselikas","doi":"10.24018/ejers.2020.5.12.2298","DOIUrl":"https://doi.org/10.24018/ejers.2020.5.12.2298","url":null,"abstract":"It is considered hard to teach programming in secondary education while achieving the aims of curriculum. However, when teaching is supported by suitable methodologies, learning can be ameliorated. Under this premise, this paper discusses different teaching approaches to programming in secondary education and examines the potential benefit of sound-alerts as a complementary teaching tool. Such alerts were created by pairing different sound stimuli to specific programming actions and operations. Both the selection of the sound stimuli, as well as the potential impact of the use of sound alerts on programming are evaluated through subjective studies. Results showed that participants preferred synthesized to natural (pre-recorded) stimuli for all types of alerts. It was also revealed that users prefer sound-alerts associated to pending actions, errors, successful code execution, conditional statements and code looping over alerts highlighting the step-by-step execution of the code. Finally, the test results showed that students understand both the meaning and the use of code commands more clearly when they use a sound-enriched programming environment instead of a conventional one. These results were the motivation for the initial creation of an audio and voice messages’ data base and the initial design of a new comprehensive educational tool using sound.","PeriodicalId":12029,"journal":{"name":"European Journal of Engineering Research and Science","volume":"80 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72913196","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}

引用次数: 0

Development and Assessment of Cracking and Sorting Processes of Palm Kernel Nut Machine 棕榈仁果仁机裂化分选工艺的开发与评价

European Journal of Engineering Research and Science Pub Date : 2020-12-30 DOI: 10.24018/ejers.2020.5.12.2258

A. Bakri, T. Ajayi, K. O. Oladerin, A. Mogbojuri

{"title":"Development and Assessment of Cracking and Sorting Processes of Palm Kernel Nut Machine","authors":"A. Bakri, T. Ajayi, K. O. Oladerin, A. Mogbojuri","doi":"10.24018/ejers.2020.5.12.2258","DOIUrl":"https://doi.org/10.24018/ejers.2020.5.12.2258","url":null,"abstract":"This paper presents a research on the Development and Assessment of the cracking and sorting processes of palm kernels nuts in a mechanical cracking machine. The palm kernel oil is an important agricultural produce, it has a wide range of usage aside from cooking. In attempt to reduce energy exploitation, in conjunction with the regular high rate of demand for products been extracted from palm kernel nut, the need to improve on the manual method of cracking and sorting became eminent. The mechanical cracker was made up of two units: the cracking and sorting unit. Experimental studies of properties of machine components were considered with the purpose of avoiding fatigue failure and fracture on the palm nuts during the processing duration. The mechanical cracker was designed, fabricated and performance evaluation carried out using locally sourced materials. It was developed with a 5hp electric motor to drive the machine coupled with belts and pulleys. The average data assessment shows a 2.01% of un-cracked nuts, 2.36% of partially cracked nuts, 93.58% of un-cracked nut and 2.05% broken nuts. The cracking-sorting efficiency was estimated at 94% and throughput capacity was determined to be 80kg/h while the overall palm kernel recovery efficiency was 85%. These suggest that the machine is very suitable for separating the palm kernel nuts from the cracked shells clearly and completely.","PeriodicalId":12029,"journal":{"name":"European Journal of Engineering Research and Science","volume":"416 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74126706","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}

引用次数: 0

Chemical Characterization of Nine Locally Made Cement Products for Quality Assurance in Nigeria Cement Industry 为保证尼日利亚水泥工业的质量，对九种本地水泥产品的化学特性进行了分析

European Journal of Engineering Research and Science Pub Date : 2020-12-30 DOI: 10.24018/ejers.2020.5.12.2008

S. A. Odewale, A. A. Oladunni, B. O. Oyewale

{"title":"Chemical Characterization of Nine Locally Made Cement Products for Quality Assurance in Nigeria Cement Industry","authors":"S. A. Odewale, A. A. Oladunni, B. O. Oyewale","doi":"10.24018/ejers.2020.5.12.2008","DOIUrl":"https://doi.org/10.24018/ejers.2020.5.12.2008","url":null,"abstract":"Chemical characterization of Portland limestone cement products collected across the nine existing cement manufacturing plants in Nigeria was conducted using Energy Dispersive X-ray Fluorescence Spectrometer (EDXRF) with the aim of determining conformity with global and local standards and investigating likely variation in quality resulting from differences in the sources of major raw materials, especially limestone used in production. The cement samples are composed essentially of CaO, SiO2, Al2O3, Fe2O3, MgO, Na2O, K2O and SO3 while P2O5, MnO and TiO2 were present in trace amount. In addition to oxide compositions, the mineralogical components: Alite (C3S), Belite (C2S), Celite (C3A), and Ferrite (C4AF), and other cement quality control variables such as Lime Saturation Factor, Silica Modulus and Alumina Modulus of all the nine cement samples analyzed in this study are in agreement with the specifications for Portland limestone cement published by the Standard Organisation of Nigeria (SON), the American Society for Testing and Materials (ASTM), and the British Standards Institution (BSI). The nine cement products also have their compositions in close proportion indicating none of the products is superior in quality irrespective of manufacturer or production site, a common misconception in the Nigerian cement market.","PeriodicalId":12029,"journal":{"name":"European Journal of Engineering Research and Science","volume":"64 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78252663","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}

引用次数: 0

Optimal Sizing of a PV System in Golpayegan, Iran Using Thermal Modeling-based Load Demand 基于负荷需求热建模的伊朗Golpayegan光伏系统的最优规模

European Journal of Engineering Research and Science Pub Date : 2020-12-30 DOI: 10.24018/ejers.2020.5.12.2295

A. Zare, M. Iqbal

引用次数: 2

A Decision Making in Selection of Bricks Using Multiple Attribute Decision Making Methods 基于多属性决策方法的砖块选择决策

European Journal of Engineering Research and Science Pub Date : 2020-12-29 DOI: 10.24018/ejers.2020.5.12.2292

S. Jain

引用次数: 0

Potentials of Processed Palm Kernel Shell Ash (Local Stabilizer) and Model Prediction of CBR and UCS Values of Ntak Clayey Soils in Akwa Ibom State, Nigeria 尼日利亚阿夸伊博姆州Ntak粘土CBR和UCS值的模型预测及棕榈仁壳灰(局部稳定剂)的潜力

European Journal of Engineering Research and Science Pub Date : 2020-12-28 DOI: 10.24018/ejers.2020.5.12.2143

S. Assam, J. Agunwamba

{"title":"Potentials of Processed Palm Kernel Shell Ash (Local Stabilizer) and Model Prediction of CBR and UCS Values of Ntak Clayey Soils in Akwa Ibom State, Nigeria","authors":"S. Assam, J. Agunwamba","doi":"10.24018/ejers.2020.5.12.2143","DOIUrl":"https://doi.org/10.24018/ejers.2020.5.12.2143","url":null,"abstract":"It is very essential to improve on the study of stabilization, as we investigate the potential of Processed Palm Kernel Shell Ash (PPKSA) as a Local stabilizer in stabilizing clay soil. The ever-increasing cost of construction materials in Nigeria and other developing countries has created the need for improved research into locally and readily available materials and also on how to convert these local materials such as Palm Kernel Shell Ash for use in construction and soil improvement. To achieve this; soil samples were collected from Ntak – Uyo, Akwa Ibom State classified as an A-2-5 soil on AASHTO and CL on UNIFIED SYSTEM of classification, were sieved and passed through sieve No. 36. It was then stabilized with (2-7%) Processed Palm Kernel Shell Ash (PPKSA) by weight of the dry soil. The investigation includes evaluation of the engineering and geotechnical properties of the soil. \u0000The results obtained shows that the increase in PPKSA content at 4.5% increase the Optimum Moisture Content (OMC) by 16.74%, Maximum Dry Density (MDD) by 1.89 gm/cm3, Unconfined Compressive Strength (UCS) by 433.12 kN/m2, California Bearing Ratio (CBR) by 55% for unsoak and 36% for soak while there was a significant reduction in the value of Liquid Limit (LL) by 30.92% and Plasticity Index (PI) by 10%. The predictive models were developed, and these models showed a good correlation with experimental results in the control tests as they possess a reasonable significant difference and a strong relationship between the measured and predicted values. \u0000The study concluded that PPKSA can be used to improve the properties of soil for construction purposes and 4.5% PPKSA content was observed to yield maximum improvement for OMC, MDD, CBR and UCS values.","PeriodicalId":12029,"journal":{"name":"European Journal of Engineering Research and Science","volume":"142 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80174482","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}

引用次数: 2

Vision, Challenges and Future Perspectives of Low Constrained Devices IOT Operating Systems: A Systematic Mapping Review 低约束设备物联网操作系统的愿景、挑战和未来展望:系统映射回顾

European Journal of Engineering Research and Science Pub Date : 2020-12-28 DOI: 10.24018/ejers.2020.5.12.2284

Sumera Rounaq, M. Iqbal

{"title":"Vision, Challenges and Future Perspectives of Low Constrained Devices IOT Operating Systems: A Systematic Mapping Review","authors":"Sumera Rounaq, M. Iqbal","doi":"10.24018/ejers.2020.5.12.2284","DOIUrl":"https://doi.org/10.24018/ejers.2020.5.12.2284","url":null,"abstract":"Now the far-fetched reality has become true with the prominence of IOT (Internet of Things) technology. Various individual devices get connected with each other to establish communication. These devices are built on a microcontroller which is responsible to receive and send information. These devices are very small and appropriate Operating Systems are required on the basis of particular device architecture, scheduling methods, network technologies and programming models. IOT Operating Systems are enormously facilitating low constrained devices to deliver their throughput efficiently in a timely manner. This concept helped a lot in emergence of IOT, which has translated our physical world into a digital cyber world. IOT devices consumes less power, less memory and less energy, therefore they need appropriate Operating Systems to act as interfaces. Low constrained Operating Systems are especially designed to provide support to these low constrained devices. Many researches have been conducted to discuss Operating Systems for these low constrained devices. In this study, capsulization of Internet of Things and its building blocks, architecture of IOT Operating System and network stack architecture of state-of -the art IOT Operating Systems such as Contiki, Tiny OS, Free RTOS, RIOT, Zephyr and Mbed OS is investigated. Moreover this, detailed overview of related work is presented with the comparative analysis of this study with the existing surveys. In addition, open research areas are discussed with recommendations.","PeriodicalId":12029,"journal":{"name":"European Journal of Engineering Research and Science","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86872144","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}

引用次数: 1

Using Cellular Automata as a Basis for Procedural Generation of Organic Cities 基于元胞自动机的有机城市程序生成

European Journal of Engineering Research and Science Pub Date : 2020-12-28 DOI: 10.24018/ejers.2020.5.12.2293

Melek B. Temuçin, I. Kocabas, Kaya Oguz

{"title":"Using Cellular Automata as a Basis for Procedural Generation of Organic Cities","authors":"Melek B. Temuçin, I. Kocabas, Kaya Oguz","doi":"10.24018/ejers.2020.5.12.2293","DOIUrl":"https://doi.org/10.24018/ejers.2020.5.12.2293","url":null,"abstract":"Procedural content generation (PCG) methods are commonly employed in computer games, simulations, and other related industries. While these methods are used for levels, terrains, stories and missions, their usage for procedural city generation is relatively rare because cities are heterogeneous structures with different components such as roads, layouts and buildings that depend on and affect each other. Additionally, ancient cities grew organically to areas that are safe and to those that provide food and water. This resulted in cities that do not have apparent regular patterns, such as rectangular building blocks. We propose an approach that uses cellular automata (CA) that generates clusters of areas. The CA is repeated for each cluster to hierarchically create different levels of the city. This procedure creates an organic city layout with fractal properties. The layout specifies the building blocks, main roads, and foliage. We also present a set of methods that can transform this layout into a three-dimensional model of the city. The results are promising; cities can be created in under a minute with minimal required input, and the resulting virtual city looks organic, rather than an algorithmic layout that has repeating patterns. ","PeriodicalId":12029,"journal":{"name":"European Journal of Engineering Research and Science","volume":"67 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85647314","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}

引用次数: 2

Effects of Two Pre-Treatment Methods on Water Absorption Property of Polyester-Fibre Composites 两种预处理方法对聚酯-纤维复合材料吸水性能的影响

European Journal of Engineering Research and Science Pub Date : 2020-12-23 DOI: 10.24018/ejers.2020.5.12.2266

P. N. Obianuko, T. U. Onuegbu

{"title":"Effects of Two Pre-Treatment Methods on Water Absorption Property of Polyester-Fibre Composites","authors":"P. N. Obianuko, T. U. Onuegbu","doi":"10.24018/ejers.2020.5.12.2266","DOIUrl":"https://doi.org/10.24018/ejers.2020.5.12.2266","url":null,"abstract":"The use of plant fibres as reinforcement in composite materials is finding increasing interest in the automotive and building industry, and the properties of plant fibre composites have been addressed in numerous research studies. The replacement of synthetic fibres with natural fibres in composites is based on their renewable and environmentally friendly nature. \u0000The aim of this work is to investigate the effects of two chemical pre-treatment methods on the water absorption property of polyester-fibre composites. Fully grown kenaf (hibiscus cannabalis) bast fibres were manually retted from the stalk, washed, and cut into short fibre lengths of about 10 cm. One portion of the fibres was pre-treated with 5% pbw NaOH solution before immersing it in glacial acetic acid and then in acetic anhydride. The second portion was pre-treated with 5%pbw of NaOH and 0.125% of KMnO4 in acetone. The third portion of fibres was untreated to serve as control. The ground fibre was incorporated into ortho unsaturated polyester and cast with Teflon square shaped mould. The cured samples were weighed and immersed in water at room temperature until no further gain in weight was observed. The SEM of the fibres and the composites was taken. The results showed that the acetylation pre-treatment method reduced the water absorption property of the composites by a minimum of 46.0% across all fibre volume fractions while the permanganate pre-treatment reduced it by at least 25.5%. Chemical pre-treatment of fibres can therefore","PeriodicalId":12029,"journal":{"name":"European Journal of Engineering Research and Science","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86301641","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}

引用次数: 0