International journal of engineering and technology最新文献_第8页

Recycling sterile gold mining waste for use as construction aggregate 回收金矿无菌废料作建筑骨料

International journal of engineering and technology Pub Date : 2020-12-31 DOI: 10.21817/IJET/2020/V12I6/201206014

E. Quintero, Carlos Alberto Ríos Reyes, Wilmarie Rios

{"title":"Recycling sterile gold mining waste for use as construction aggregate","authors":"E. Quintero, Carlos Alberto Ríos Reyes, Wilmarie Rios","doi":"10.21817/IJET/2020/V12I6/201206014","DOIUrl":"https://doi.org/10.21817/IJET/2020/V12I6/201206014","url":null,"abstract":"Gold is found in part by the thousands in rocks, which makes it necessary to mine a large quantity of rock in order to obtain a minimum quantity of gold. This leads to the generation of a significant amount of solid waste product because of the crushing and grinding of the material that generates waste from block size to sandy and fine granulometry. These residues end up as deposits on the surface or slopes that generate the danger of landslides or damage in the soil, another large part of the ground material ends up dumped in rivers and streams, which increases the rate of sedimentation and the deposition of heavy metals. In Colombia, the areas that are dedicated to the exploitation of gold encompass large regions, which generates that a significant amount of water sources are affected, in addition, the mines are in some cases close to the paramos such as the Santurban paramo, an important source of water in the north of Colombia. In the field studies, it was observed that 6 tons of sterile waste is generated per day that meets the standards as a construction aggregate for use in the concrete mix. In the tests carried out it was found that it can be used for structural concrete. Petrographic and chemical analyzes revealed significant silica content from plagioclase, quartz, and micas that make up the sterile residue. KeywordWaste Minimization, Aggregate Concrete, Sustainability, mining, gold","PeriodicalId":14142,"journal":{"name":"International journal of engineering and technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79424522","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

A Technique For Lock-In Prediction On A Fluid Structure Interaction Of Naca 0012 Foil With High Re 高Re Naca 0012箔流固相互作用的锁相预测技术

International journal of engineering and technology Pub Date : 2020-12-30 DOI: 10.24003/EMITTER.V8I2.543

N. Arini, S. Turnock, M. Tan

{"title":"A Technique For Lock-In Prediction On A Fluid Structure Interaction Of Naca 0012 Foil With High Re","authors":"N. Arini, S. Turnock, M. Tan","doi":"10.24003/EMITTER.V8I2.543","DOIUrl":"https://doi.org/10.24003/EMITTER.V8I2.543","url":null,"abstract":"A numerical lock-in prediction technique of a NACA 0012 hydrofoil, immersed in a flow having a Re of 3.07x106 is proposed in this paper. The technique observes the foil’s response as part of a fluid-structure interaction analysis. The response is modelled by foil’s vibration which is represented by spring and damper components. The technique identifies and predicts the foil’s lock-in when it vibrates. The prediction is examined using the Phase Averaged Method which employs the Hilbert Transform Method. The aim of this paper is to propose a numerical way to identify a lock-in condition experienced by a NACA 0012 foil in a high Reynolds number flow. The foil’s mechanical properties are selected and its motions are restricted in two modes which are in the pitch and heave directions. The rotational and transverse lock-in modes are identified in the model. The existence of lock-in is verified using pressure distribution plot, the history of trailing edge displacement and fluid regime capture. The history of total force coefficients is also shown to justify the result. The result shows that the technique can predict reliably the lock-in condition on the foil’s interaction. Three main fluid induced vibration frequencies are generated in the interaction. None of them are close to natural frequency of the foil and lock-in is apparently not found in the typical operational condition.","PeriodicalId":14142,"journal":{"name":"International journal of engineering and technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79199036","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: 3

Thermal Analysis of Solar Air Heater with Ventilator Turbine and Fins 带透平和翅片的太阳能空气加热器的热分析

International journal of engineering and technology Pub Date : 2020-12-28 DOI: 10.24003/EMITTER.V8I2.584

A. G. Safitra, L. Diana, Denny Muhammad Agil, Julfan Hafiz Fareza, N. Arini

{"title":"Thermal Analysis of Solar Air Heater with Ventilator Turbine and Fins","authors":"A. G. Safitra, L. Diana, Denny Muhammad Agil, Julfan Hafiz Fareza, N. Arini","doi":"10.24003/EMITTER.V8I2.584","DOIUrl":"https://doi.org/10.24003/EMITTER.V8I2.584","url":null,"abstract":"Solar air heater (SAH) is a renewable energy application for the drying process. SAH has a challenge to produce high performance under uncertain weather. The performance of SAH can be enhanced by providing the absorber plate by adding the fins. This study aims to evaluate the thermal performance of SAH with rectangular fins SAH at low air velocity. This study compares the performance of SAH without fins and SAH with rectangular fins. Two variations of a tilt angle of SAH are 0° and 30° which are observed in this study. The SAH uses a ventilator turbine to suck air into the collector box. The air velocity is 0.01 m/s. The method is experimental. The SAH is tested under real condition from 9 a.m. to 4 p.m. The measurement tools consist of a pyranometer, an anemometer, a temperature sensor in the inlet section, 3 sensors in the absorber plate, a sensor in the outlet section, 6 temperature sensors in the drying cabinet. The result showed the thermal efficiency of SAH with rectangular fins is 29.67 % higher than SAH without fins at 0 ̊ tilt of angle at noon. The thermal efficiency of SAH with rectangular fins is 25.26 % higher than that of without fins at 30 ̊ tilt of angle at noon.","PeriodicalId":14142,"journal":{"name":"International journal of engineering and technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77779895","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

Science in mobile apps for education: tackling online learning within pandemic outbreak 教育移动应用中的科学:在大流行爆发期间解决在线学习问题

International journal of engineering and technology Pub Date : 2020-12-25 DOI: 10.14419/IJET.V10I1.31150

NH Kamarudin, E. Ong, WS Chung

{"title":"Science in mobile apps for education: tackling online learning within pandemic outbreak","authors":"NH Kamarudin, E. Ong, WS Chung","doi":"10.14419/IJET.V10I1.31150","DOIUrl":"https://doi.org/10.14419/IJET.V10I1.31150","url":null,"abstract":"In adapting the issues of pandemic, educational sectors in Malaysia from the lower school level till university levels are encouraged to forecast any specific tools that may help in cater the needs in utilizing online learning. It is by right the issues that been face by global outbreak for everyone on earth as Covid19 that embarked big challenges in face to face and normal daily classes and learning method. Therefore this paper is written to give a general overview, uncover the possible models in used and technologies that may overcome the needs of online education specifically focused for improving the usage of online educational tools especially with the use of mobile ap-plication for learning itself. The concept of manual for pen and paper reporting can makes the reporting very slow especially in terms of communication and sharing of information. Plus, within the outbreak patterns may will provide inaccurate information and may also late results to be achieved. This paper is discussing model in plan and the implementation proposed with overcome results of the post results questionnaire conducted to get the major feedback on usage of the current proposed app.","PeriodicalId":14142,"journal":{"name":"International journal of engineering and technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76487877","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

Determining the maximum sediment dispersion in an ocean disposal site for dredged material in Buenaventura, Colombia 确定哥伦比亚布埃纳文图拉疏浚材料海洋处置场地的最大沉积物分散

International journal of engineering and technology Pub Date : 2020-12-18 DOI: 10.14419/IJET.V9I4.31267

Leydis Villadiego Rojas, Ricardo Daza González, Bladimir Salcedo Castilla

引用次数: 0

Implementation and Integration of Fuzzy Algorithms for Descending Stair of KMEI Humanoid Robot KMEI类人机器人下楼梯模糊算法的实现与集成

International journal of engineering and technology Pub Date : 2020-12-02 DOI: 10.24003/emitter.v8i2.535

Wulandari Puspita Sari, R. S. Dewanto, D. Pramadihanto

引用次数: 1

Review of wireless body sensor networks 无线身体传感器网络综述

International journal of engineering and technology Pub Date : 2020-11-10 DOI: 10.14419/IJET.V9I4.31193

Sondous Sulaiman Wali, M. N. Abdullah

引用次数: 2

Comparison of seismic provisions of Andean countries 安第斯国家地震规定的比较

International journal of engineering and technology Pub Date : 2020-11-10 DOI: 10.14419/IJET.V9I4.31219

Adriana Mattos-Rodríguez, Stevens Barraza, Camilo Verbel Almario

引用次数: 0

Study on the Numerical Analysis of In-Line Type Separator for Oil-Water Multiphase 油水多相直列式分离器数值分析研究

International journal of engineering and technology Pub Date : 2020-11-01 DOI: 10.7763/ijet.2020.v12.1184

Hyunji Kim, GwiNam Kim, Young-Ju Kim, N. Woo, Sunchul Huh

引用次数: 0

Performance Analysis of a Laboratory Carbon Dioxide Absorption Setup Using Aqueous Monoethanolamine Solution 使用单乙醇胺水溶液的实验室二氧化碳吸收装置性能分析

International journal of engineering and technology Pub Date : 2020-11-01 DOI: 10.7763/ijet.2020.v12.1185

Naruphol Janwiruch, Thananat Lungkadee, N. Tippayawong

引用次数: 0