European Journal of Engineering Research and Science https://ejers.org/index.php/ejers <table width="80%" cellpadding="10" align="center"> <tbody> <tr> <td rowspan="4" valign="top" width="20%"><img src="/public/site/images/editor_in_chief/dergi_issue2.jpg" alt="jets" align="left" border="0" hspace="30"> <button style="background: #10C9F5; cursor: pointer; font-size: 15px; font-style: bold; text-align: center; color: white; margin: 5px; padding: 5px 5px 5px 5px; border-radius: 15px; border: 2px solid #0D0A0A; width: 275px;" type="button"><strong>DOI</strong> : 10.240818/EJERS</button> <button style="background: #10C9F5; cursor: pointer; font-size: 15px; font-style: bold; text-align: center; color: white; margin: 5px; padding: 5px 5px 5px 5px; border-radius: 15px; border: 2px solid #0D0A0A; width: 275px;" type="button"><strong>ISSN</strong> : 2506-8016</button> <button style="background: #10C9F5; cursor: pointer; font-size: 15px; font-style: bold; text-align: center; color: white; margin: 5px; padding: 5px 5px 5px 5px; border-radius: 15px; border: 2px solid #0D0A0A; width: 275px;" type="button"><strong>Impact Factor</strong> : 0,69</button> <button style="background: #10C9F5; cursor: pointer; font-size: 15px; font-style: bold; text-align: center; color: white; margin: 5px; padding: 5px 5px 5px 5px; border-radius: 15px; border: 2px solid #0D0A0A; width: 275px;" type="button"><strong>Publication Frequency:</strong> Monthly</button> <button style="background: #10C9F5; cursor: pointer; font-size: 15px; font-style: bold; text-align: center; color: white; margin: 5px; padding: 5px 5px 5px 5px; border-radius: 15px; border: 2px solid #0D0A0A; width: 275px;" type="button"><strong>Country of Origin:</strong> Belgium</button></td> <td align="right" valign="bottom" width="20%" height="70px">&nbsp;<img src="/upload/documents/new10_e0.gif" alt="gif" border="0"></td> <td align="left" valign="bottom" height="125px"><button style="background: #A2E3FF; cursor: pointer; font-size: 15px; font-style: bold; text-align: center; color: blue; padding: 8px 16px; border-radius: 10px; border: 2px solid #4CAF50; width: 300px;" type="button">CALL FOR PAPER - NOVEMBER 2018</button></td> </tr> <tr> <td rowspan="3" align="right" valign="top" width="20%">&nbsp;</td> <td align="left" valign="top" height="75px"><button style="background: #A2E3FF; cursor: pointer; font-size: 15px; font-style: bold; text-align: center; color: blue; padding: 8px 16px; border-radius: 10px; border: 2px solid #4CAF50; width: 300px;" type="button">SUBMIT YOUR PAPER FOR PEER REVIEW</button> &nbsp;</td> </tr> <tr> <td align="left" valign="middle" height="100px"><img src="/public/site/images/editor_in_chief/crossref_badge2.png" alt="Natural" width="110" height="60"> <img src="/public/site/images/editor_in_chief/open_access.jpg" alt="Natural" width="110" height="60"> <img src="/public/site/images/editor_in_chief/indexing_policy2.jpg" alt="Natural" width="220" height="60"> <img src="/public/site/images/editor_in_chief/no_plagiarism2.jpg" alt="Natural" width="220" height="60"> <img src="/public/site/images/editor_in_chief/clockss_lockss.png" alt="Natural" width="100" height="60"></td> </tr> <tr> <td align="left" valign="top"> <p style="font-size: 14px; margin: 6px;">Submit&nbsp;<a href="/index.php/ejers/user/register"><span style="text-decoration: underline;"><strong>Online</strong></span>&nbsp;</a>or by&nbsp;<span style="text-decoration: underline;"><a href="mailto:editor@ejers.org"><strong>E-mail</strong></a></span>&nbsp;to&nbsp;<a href="mailto:editor@ejers.org">editor@ejers.org</a></p> </td> </tr> </tbody> </table> <table style="width: 100%;" cellpadding="7"> <tbody> <tr> <td>&nbsp; <iframe src="https://www.youtube.com/embed/jW1fB2qUlOU" width="450" height="250" frameborder="0"></iframe></td> <td valign="top" bgcolor="FAFAFA"> <p><span style="color: blue;">&nbsp;<strong><span style="font-size: 140%; color: blue;"> ►&nbsp;</span> <span style="font-size: 140%; color: blue; text-decoration: underline;">What does EJERS do</span></strong></span> <strong><span style="font-size: 140%; color: blue;"> ?</span></strong><strong><em>&nbsp;</em></strong></p> <p><strong>European Journal of Engineering Research and Science</strong>&nbsp;(EJERS) is a peer reviewed&nbsp;international journal publishes&nbsp;<strong>monthly</strong>&nbsp;full length state-of-the-art&nbsp;research papers, reviews, case studies related to <strong>all areas of Engineering and Science</strong>.&nbsp;</p> <p>All submitted articles:</p> <ul> <li class="show">must be <strong>original</strong></li> <li class="show">must be<strong> previously unpublished research results</strong></li> <li class="show">must be <strong>experimental or theoretical</strong></li> <li class="show">and will be <strong>peer-reviewed</strong></li> <li class="show">may not be <strong>considered for publication elsewhere at any time during the review period</strong></li> </ul> <p><strong>&nbsp;</strong>EJERS is published by<strong>&nbsp;<a href="http://www.europapublishing.org">European Open Access Publishing (EUROPA Publishing)</a></strong>&nbsp;</p> </td> </tr> </tbody> </table> <p>&nbsp;</p> <table style="width: 100%;" cellpadding="3"> <tbody> <tr> <td valign="top" bgcolor="FAFAFA"> <p><strong><span style="font-size: 140%; color: blue;">&nbsp; &nbsp; ►&nbsp;</span><span style="text-decoration: underline; font-size: 140%; color: blue;">Why do we do it</span><span style="font-size: 140%; color: blue;"> ?<em>&nbsp;</em></span> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;</strong>&nbsp;</p> <p>We believe that academic publishing should be a&nbsp;<strong>not-for-profit</strong>&nbsp;enterprise undertaken for the good of mass dissemination, not predicated upon exclusionary paywalls. Thus, EJERS aims to decrease the <strong><a href="/index.php/ejers/about/submissions#authorFees">Article Processing Charge (APC)</a></strong>&nbsp;to acceptable boundaries.&nbsp;</p> <p>&nbsp;</p> <p><strong>&nbsp; &nbsp; &nbsp;<span style="font-size: 140%; color: blue;">►&nbsp;<span style="text-decoration: underline;">How do we do it</span></span> <span style="font-size: 140%; color: blue;"> ?</span>&nbsp;&nbsp;</strong>&nbsp;</p> <p><strong>Open Access Policy</strong><br><br>EJERS provides immediate open access to its content on the principle that making research freely available after publication on the journal website to the public supports a greater global exchange of knowledge.</p> <p><img src="/public/site/images/editor_in_chief/open_access.jpg" alt=""></p> <hr align="left" width="250px"> <p><strong>Zero Tolerance for Plagiarism&nbsp;</strong></p> <p>EJERS has a policy of “Zero Tolerance on the Plagiarism”. We check the plagiarism issue through two methods: reviewer check and plagiarism prevention tool (iThenticate.com).</p> <p>All submissions will be checked by plagiarism prevention software before being sent to reviewers.</p> <p>&nbsp;<img src="/public/site/images/editor_in_chief/no_plagiarism2.jpg" alt=""></p> <hr align="left" width="250px"> <p><strong>Digital Archiving Policy&nbsp;</strong></p> <p>EJERS uses LOCKSS system as digital archiving policy. LOCKSS ensures long-term survival of Web-based scholarly publications. Namely, your publication will remain digitally available forever for free under Creative Commons License.</p> <p><img src="/public/site/images/editor_in_chief/clockss_lockss.png" alt=""></p> <hr align="left" width="250px"> <p>&nbsp;&nbsp;<strong>Indexing&nbsp;</strong></p> <p><br><span class="auto-style5">All EJERS content is indexed with&nbsp;<a href="http://www.crossref.org/">CrossRef</a>&nbsp;and assigned a&nbsp;<a href="http://www.doi.org/">Digital Object Identifier (DOI)</a>. This means that all of our references are made available so that citations can be tracked by the publishing community.</span></p> <p><span class="auto-style5">In addition, EJERS is indexed in :</span></p> <ul> <li class="show"><a style="background-color: #ffffff;" href="https://scholar.google.com/citations?hl=en&amp;user=A_Gus1kAAAAJ"><span class="auto-style5">Google Scholar</span></a></li> <li class="show"><a style="background-color: #ffffff;" href="https://portal.issn.org/resource/ISSN/2506-8016"><span class="auto-style5">ROAD</span></a></li> <li class="show"><a style="background-color: #ffffff;" href="https://www.scilit.net/pub/article/10.24018"><span class="auto-style5">SCILIT</span></a></li> <li class="show"><a style="background-color: #ffffff;" href="https://www.worldcat.org/search?q=so%3AEuropean+Journal+of+Engineering+Research+and+Science&amp;qt=results_page"><span class="auto-style5">WorldCat</span></a></li> <li class="show"><a style="background-color: #ffffff;" href="https://www.scienceopen.com/user/3eed4386-308b-4036-abc4-d2d83df0dcdd"><span class="auto-style5">ScienceOpen</span></a></li> </ul> <img src="/public/site/images/editor_in_chief/indexing_policy.png" alt="Natural" width="1200" height="60"><hr align="left" width="250px"> <p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;</p> <p><strong>Paper Selection and Publishing Process</strong></p> <p><em>a) Submission Acknowledgement</em></p> <p>When you submit a manuscript online, you will receive a submission acknowledgement letter sent by the online system automatically. For email submissions, the editor or editorial assistant sends an email confirmation to the authors within one to three working days. If you fail to receive this confirmation, please check your bulk email box or contact the editorial assistant.</p> <p><em>b) Basic Review</em></p> <p>The editor or editorial assistant determines whether the manuscript fits the journal’s focus and scope. Next a check for the similarity index is done by using CrossCheck, powered by iThenticate. Any manuscripts that are out of the journal’s scope or containing plagiarism, including self-plagiarism, are rejected.</p> <p><em>c) Peer Review</em></p> <p>We use a double-blind system for peer reviewing; both reviewers’ and authors’ identities remain anonymous&nbsp;to each other. The paper will be peer-reviewed by two or three experts;&nbsp;one is an editorial staff and the other two are external reviewers.&nbsp;The review process may take two to four weeks.</p> <p><em>d) Decision&nbsp;</em></p> <p>The decision&nbsp;(Acception, Revision or Decline)&nbsp;is based on the suggestions of reviewers. If there is a different opinion between reviewers, the editor will arrive to a balanced decision based on all the comments, or a second round of peer-reviewing may be initiated.&nbsp;</p> <p><em>e) Publication Fee</em></p> <p>In order to start the copyediting procedures, <a href="/index.php/ejers/about/submissions#authorFees">Paper Publication Fee</a>&nbsp;must be paid.&nbsp;</p> <p><em>f) Copyediting Process-Step 1 : Journal Template Adaptation</em></p> <p>The authors need to re-edit the paper, using the template. The re-edited paper should use the template provided by us and meet the formatting requirements outlined in the Author Guidelines.</p> <p>All accepted manuscripts are obligated to adapt the layout of the paper according to the journal's template. EJERS provides a <a href="/upload/documents/EJERS_template.docx">.DOCX template format</a>, and also accepts <a href="https://www.ieee.org/conferences/publishing/templates.html">IEEE journal LaTeX template format</a>.</p> <p><em>g) Copyediting Process-Step 2</em></p> <p>After receiving the revised paper. Our editing staff will work on the layout and format. After the process, we will invite you to check the paper again.</p> <p><em>h) Online Publication &amp; Indexing</em></p> <p>E-journal in .PDF &nbsp;format will be available on the journal’s webpage free of charge for download. In addition, a DOI identifier will be assigned to your paper, and you will be informed regarding to the DOI number.</p> <p>&nbsp;&nbsp;</p> <p>&nbsp;</p> </td> </tr> </tbody> </table> European Open Access Publishing en-US European Journal of Engineering Research and Science 2506-8016 <p>The names and email addresses entered in this journal site will be used exclusively for the stated purposes of this journal and will not be made available for any other purpose or to any other party.</p> <p>Submission of the manuscript represents that the manuscript has not been published previously and is not considered for publication elsewhere.&nbsp;</p> Design and Simulation of a Unified Power Quality Conditioner by Fuzzy Logic for Egyptian Power Grid Connected to Zafarana Egypt Wind System https://ejers.org/index.php/ejers/article/view/1459 <p>Wind energy system is lately receiving a lot of attention, because they are cost inexpensive, environmental safe and clean renewable energy source, as compared with nuclear and fossil fuel power generation. The operational characteristics of wind electric turbines has considerable dissatisfaction and stress on the quality of electric power system. Harmonics, variations of voltage and reactive power are most of power quality issues for grid connected with wind turbine. This paper introduces a design and simulation of unified power quality conditioner using a fuzzy controller to improve the power quality for Egyptian power grid connected to Zafarana Egypt wind system. The proposed performance of the unified power quality conditioner system is verified by simulating the model using MATLAB/SIMULINK environment. The simulation results showed that the proposed unified power quality conditioner provide efficient cancellation of both load current &nbsp;harmonics &nbsp;and supply voltage sag in addition to compensation of reactive power, and thus making the electrical grid connected wind energy system more efficient by improving the quality of power.</p> Montaser Abd El Sattar Adel A. Elbaset Ali H. KasemAlaboudy Wessam Arafa Hafez Copyright (c) 2019 Montaser Abd El Sattar, Adel A. Elbaset, Ali H. KasemAlaboudy, Wessam Arafa Hafez http://creativecommons.org/licenses/by/4.0 2019-09-04 2019-09-04 4 9 1 8 10.24018/ejers.2019.4.9.1459 The Effect of Calcium Carbonate Filler on Self-Compacting Concrete Using Different Aggregate Sizes https://ejers.org/index.php/ejers/article/view/1485 <p>In this research work, the effect of Calcium Carbonate Filler was studied on the compressive strength and the workability of self-compacting Concrete (SCC) at different grades (M60, M65 and M70) and different coarse aggregate sizes (6.3mm, 10mm and 20mm). Calcium Carbonate Filler (Limestone powder) and Rice Husk Ash (RHA) were added in percentages of 2.5% and 5% to check its effect on the workability and strength properties of SCC and Normally Vibrated Concrete. Experimental investigations were carried out on SCC and normally vibrated concrete (NVC) samples of grade M60, M65 and M70 using different aggregate sizes of 6.3mm, 10mm and 20mm. The workability test results obtained showed values within specification. &nbsp;The compressive and Tensile strengths for SCC (with powder and 2.5% RHA) are higher than that with powder and 5% RHA and NVC. Generally, the use of Calcium Carbonate Filler improved the strength and densities for SCC design mix and decreased its workability. It is concluded that the use of SCC with designed Fillers ratio and RHA (≤5%) will improve the strength properties of SCC.</p> Wasiu John Agbawhe Okeoghene Oghenekume Tuleun Lawrence Zahemen Copyright (c) 2019 Wasiu John, Agbawhe Okeoghene Oghenekume, Tuleun Lawrence Zahemen http://creativecommons.org/licenses/by/4.0 2019-09-05 2019-09-05 4 9 9 16 10.24018/ejers.2019.4.9.1485 A Brief Review of Growth Techniques for Obtaining of III-V Semiconductor Compounds https://ejers.org/index.php/ejers/article/view/1477 <p>Electronic devices have essential importance in our quality of life. Our species has multiple comforts and benefits obtained by current technology, such as microelectronics, optoelectronics, and nanotechnology. However, few are interested in the different physical phenomena that are behind our technology. This paper presents a brief review of four growth techniques for the obtaining of III-V semiconductors compounds. Techniques such as metalorganic chemical vapor deposition, hot filament chemical vapor deposition, liquid phase epitaxy, and molecular beam epitaxy are described in a simple way to motivate the understanding of the theoretical concepts that make operated our technology.</p> Erick Gastellóu G. García A. M. Herrera C. Morales R. García G. A. Hirata M. Robles J. A. Rodríguez I. E. García Copyright (c) 2019 Erick Gastellóu, G. García, A. M. Herrera, C. Morales, R. García, G. A. Hirata, M. Robles, J. A. Rodríguez, I. E. García http://creativecommons.org/licenses/by/4.0 2019-09-10 2019-09-10 4 9 17 21 10.24018/ejers.2019.4.9.1477 DNS Data Exfiltration Detection Using Online Planning for POMDP https://ejers.org/index.php/ejers/article/view/1500 <p>This paper addresses a problem of blocking Domain Name System (DNS) exfiltration in a computer network. DNS exfiltration implies unauthorized transfer of sensitive data from the organization network to the remote adversary. Given detector of data exfiltration in DNS lookup queries this paper proposes an approach to automate query blocking decisions. More precisely, it defines an L-parametric Partially Observable Markov Decision Process (POMDP) formulation to enforce query blocking strategy on each network egress point, where L is a hyper-parameter that defines necessary level of the network security. The efficiency of the approach is based on (i) absence of interactions between distributed detectors, blocking decisions are taken individually by each detector; (ii) blocking strategy is applied to each particular query, therefore minimizing potentially incorrect blocking decisions.</p> Yakov Bubnov Copyright (c) 2019 Yakov Bubnov http://creativecommons.org/licenses/by/4.0 2019-09-10 2019-09-10 4 9 22 25 10.24018/ejers.2019.4.9.1500 Distant Measuring and Regulating of Ecological Parameters of the Air in Closed Spaces https://ejers.org/index.php/ejers/article/view/1482 <p>For providing a high socio-economic level of the population of a country high technical equipment of the enterprises producing and processing agricultural products has quite an essential value, especially in the newly developing countries such as Armenia. The introduction of modern leading technologies into the farms and agricultural enterprises will support the fast growth of production that will in its turn result in the increase of the social level of the population and decrease of the poverty. The aim of this paper is the development and creation of an experimental sample of “Ecology-Microclimate” agricultural controlling-measuring automatic electronic system, which is intended for distant measuring and regulating of the air temperature and relative humidity of the closed spaces or areas of the enterprises (farms) as well as for controlling the concentration of polluting/harmful gases (methane and ammonia). The introduction of the “Ecology-Microclimate” system in the poultry factories and other farms and greenhouse enterprises as well as grain product stores will undoubtedly lead to the increase of the production and safe long-term storage.</p> Ruben Asatryan Hamlet Karayan Norayr Khachatryan Copyright (c) 2019 Ruben Asatryan, Hamlet Karayan, Norayr Khachatryan http://creativecommons.org/licenses/by/4.0 2019-09-10 2019-09-10 4 9 26 28 10.24018/ejers.2019.4.9.1482 Necessity of General-Purpose Operating Systems for Wearable Computing Environments https://ejers.org/index.php/ejers/article/view/1492 <p>The wearable technology is carefully expected as a next generation business platform which can lead to changes from the smartphone-based hardware and software market. In this paper, we consider whether wearable computing environment with unlimited potential would require an operating system or not by comparing with other computing environment such as a general-purpose computer. In addition, a brief history of wearable technology and the necessity of studying about operating systems for highly merged wearable devices with software systems will be discussed. We also review the features of existing operating systems in different computing environments and discuss the elements that a wearable operating system should have.</p> HyunChul Joh JooYoung Lee Copyright (c) 2019 HyunChul Joh, JooYoung Lee http://creativecommons.org/licenses/by/4.0 2019-09-12 2019-09-12 4 9 29 36 10.24018/ejers.2019.4.9.1492 Data-Driven Hint Generation in Intelligent Tutoring Systems for Learning Microeconomics https://ejers.org/index.php/ejers/article/view/1510 <p>Scientific&nbsp;inquiry&nbsp;skills&nbsp;is&nbsp;used in all educational areas. In the context of microeconomics, it is widely known that the development of scientific inquiry skills is central to the construction of ideas that enable understanding. Intelligent&nbsp;tutoring&nbsp;systems&nbsp;(ITSs)&nbsp;have&nbsp;been&nbsp;shown&nbsp;to be effective in supporting students'&nbsp;domain-level learning through guided&nbsp;problem solving practice. ITSs provide personalized feedback (in the form of hints) to students and improve learning at effect sizes approaching that of human tutors. However, creating an ITS to adapt to individual students requires the involvement of experts to provide knowledge about both the academic domain and novice student behavior in that domain’s curriculum. Creating&nbsp;an&nbsp;ITS requires time,&nbsp;resources, and multidisciplinary skills. Because of the large possible range of problem solving behavior for any individual topic, the amount of expert involvement required to create an effective, adaptable tutoring system can be high, especially in open-ended problem solving domains. Data-driven ITSs have shown much promise in increasing effectiveness by analyzing past data in order to quickly generate hints to individual students. However, the fundamental long term goal was to develop “better, faster, and cheaper” ITSs. The main goal of this paper is to: 1) presents ITSs used in the microeconomics education; and 2) introduce data-driven ITSs for microeconomics education.</p> <p><strong>&nbsp;</strong></p> Bui Trong Hieu Bui Thi Kim Uyen Copyright (c) 2019 Bui Trong Hieu, Bui Thi Kim Uyen http://creativecommons.org/licenses/by/4.0 2019-09-13 2019-09-13 4 9 37 40 10.24018/ejers.2019.4.9.1510 An Overview Study of Camless Combustion Engines https://ejers.org/index.php/ejers/article/view/1511 <p>The internal combustion engine (ICE) finds its place in the market with latest design modifications in various components to improve efficiency, economy and overall performance. However, one component has remained unchanged in the internal combustion engine development i.e., the camshaft, has been the primary means of controlling the valve actuation and timing, and therefore, influencing the overall performance of the vehicle. Camless technology is capturing the future of internal combustion engines. It has been known to man that if valves could be controlled independently in an Internal Combustion Engine then there would be benefits like increased power, reduced emissions and increased fuel economy. In the camless technology valve motion is operated by valve actuators of electro-mechanical and electro-hydraulic type. In this paper we compare camless valve operation with conventional valve operation and we deal with the valve actuating mechanisms of camless engine by considering the electromechanical and electrohydraulic actuators as the important types of actuating valves in camless engines.</p> Thanh Hai Truong Van Huong Dong Copyright (c) 2019 Thanh Hai Truong, Van Huong Dong http://creativecommons.org/licenses/by/4.0 2019-09-15 2019-09-15 4 9 41 45 10.24018/ejers.2019.4.9.1511 Analysis of Low Temperature Process for Technical Application https://ejers.org/index.php/ejers/article/view/1512 <p>In the technical work on low temperature so far lacks a full analysis of the basis of thermodynamic processes using modern methods. Meanwhile, the low temperature conventions widely used in different fields. The purpose of this section is to give readers tools for thermodynamic studies and presents changes in the system on a fairly low temperature, intuitive nature and practices for analysis low-temperature processes related to cold and depth on the basis of using a unified approach. The low temperature process is applied in a number of techniques including basic process repeated. So it is best to preliminary studies the changing characteristics of our energy to then study the overall process.</p> Thi Minh Hao Dong Thanh Hai Truong Copyright (c) 2019 Thi Minh Hao Dong, Thanh Hai Truong http://creativecommons.org/licenses/by/4.0 2019-09-15 2019-09-15 4 9 46 51 10.24018/ejers.2019.4.9.1512 Design and Implementation of Empower English Program Online (EEPO) for Students and Learners of Ho Chi Minh City University of Transport https://ejers.org/index.php/ejers/article/view/1513 <p>Technology and computers have affected teaching and learning English in tertiary education worldwide. It is seen as an important resource for instruction in foreign language teaching. There is a wide use of its ability to create online environments in which students can take the benefits from them. The Department of Foreign Languages (DFL) ​​of Ho Chi Minh City University of Transport (UT-HCMC) recognizes the importance and the effectiveness of online English learning in the information technology era. Just a networked computer or smart phone, a headset and a course account, students can learn English anytime, anywhere. Online English learning can match different learning styles and use different activities. Currently, the Department is using the Social Learning software of Knowledge Transmission Publisher, with the simple content, high cost and the relatively low level compared to the required learning outcomes stipulated by Vietnam Ministry of Education and Training (MOET). The DFL wishes to build our own online English program to overcome the above disadvantages. Thus, this research paper explores teachers’ and students’ viewpoints on the present online program which has been used for the UT-HCMC students for the past 5 years- The Online Connected Program (OCP). The analysis of the responses to the questionnaires for teachers and students provides us with their perspectives as well as the difficulties they face when using OCP. The teachers’ and students’ suggestions are also collected. The findings obtained from this study will be used as the basis for designing a self-study online curriculum in the near future as a supplementary teaching adapted for both UT-HCMC students’ needs and UT-HCMC teachers’ expectations. The researchers present some conclusions supported by quotations from the previous papers in an attempt to draw the research theory and practice.</p> Vu Thi Lan Anh Nguyen Phuc Hung Ngo Thi Phuong Thao Copyright (c) 2019 Vu Thi Lan Anh, Nguyen Phuc Hung, Ngo Thi Phuong Thao http://creativecommons.org/licenses/by/4.0 2019-09-15 2019-09-15 4 9 52 57 10.24018/ejers.2019.4.9.1513 Hardware co-simulation of 1024-point FFT and it's Implementation, in Simulink, Xilinx Vivado IDE on Zynq-7000 FPGA https://ejers.org/index.php/ejers/article/view/1501 <p>In this paper a 1024-point FFT Algorithm is implemented on Zynq-7000 FPGA device. The design implementation uses Hardware co-simulation in Simulink and Xilinx Vivado environments with Zynq-7000 FPGA target evaluation board using JTAG setup. &nbsp;The power parameter for the configured FFT IP core for 1024 point and the signal source DDS block are estimated. The DDS with both sine and cosine signal outputs enabled, consume a power of 0.277 W, whereas, the 1024 point FFT core consume a power of 0.044 W. Further when 2 DDSs were instanced to generate orthogonal sine and cosine sources for OFDM signals of same frequency 1MHz each, a total of 0.277W power is consumed. When a single DDS core is configured for both sine or cosine signal only configuration by instancing a 1024-point FFT core the total power consumed is 0.268W and 0.267W, respectively, a 1mW higher to cosine case. Further, when 1024 point FFT core power alone is calculated it is found to be 0.044W (or 44mW). When a single DDS is instanced for OFDM signal generation by opting both the sine cosine signals, it consumed a total power of 0.233 W saving a power of 0.044W or 44mW by sine or cosine data re-use from the LUT ROM of DDS. Thus saving a power of 44mW by using data re-use through LUT’s of DDS. This is a significant power saving. In this, hardware co-simulation process, Xilinx system generator tool (Sysgen) is used. This implementation is coded using Verilog HDL, verified on Xilinx Vivado platform on the &nbsp;Zynq-7000 FPGA device. Note that Zynq-7000 is supporting hardware co-simulation, hence the 1024-point FFT&nbsp; has been implemented on this device. The simulation results are captured on Xilinx signal viewer for a proper conclusion.</p> K. S. Shashidhara H. C. Srinivasaiah Copyright (c) 2019 K. S. Shashidhara, H. C. Srinivasaiah http://creativecommons.org/licenses/by/4.0 2019-09-15 2019-09-15 4 9 58 64 10.24018/ejers.2019.4.9.1501 East Sea - Natural Resources in Vietnam https://ejers.org/index.php/ejers/article/view/1516 <p>In Vietnam, status is mentioned a lot in recent economic and management documents. The scientific basis of the position resources for socio-economic development is still a new issue in our country, and it is not accessible in the world. However, this is a significant direction that the right awareness will create a new perspective on the rational use of resources, spatial organization, and planning of rational and sustainable socio-economic development. Vietnam is particularly crucial in Southeast Asia thanks to a territory stretching over three thousand kilometers on the western edge of the South China Sea and a territorial sea area of over one million square kilometers, three times the area of the territory. The Vietnam Sea is located in a tropical monsoon region, with world-class rivers that the basin covers six countries. The Vietnam Sea plays an essential role in the environment, the ecology of the East Sea and the region, an exclusive transitional zone between the Indian Ocean and the Pacific Ocean in terms of biological and maritime geography. The development of an industrialized and modernized economy must inevitably be linked to the maritime potential of the ocean. This article presents the initial findings on the coastal and coastal status of Vietnam.</p> Le Hung Duong Thi Minh Hao Dong Copyright (c) 2019 Le Hung Duong, Thi Minh Hao Dong http://creativecommons.org/licenses/by/4.0 2019-09-15 2019-09-15 4 9 65 69 10.24018/ejers.2019.4.9.1516 The Current Environmental Situation and Green Solutions for Vietnam's East Sea https://ejers.org/index.php/ejers/article/view/1517 <p>The South China Sea, including the Vietnam Sea, is witnessing significant changes under the impact of both nature and man. These are the impacts of climate change and ocean change with "extreme" signs such as increasing storms, coastal floods, sea level rise, sea acidification, pollution and environmental incidents, ... occur thicker, more intense and irregular. Especially serious degradation of the environment and biodiversity of the sea, increasing environmental incidents, including oil spills, ... due to human impact. Especially the large-scale destruction of coral reefs, seagrass beds in island clusters off the South China Sea has been happening at a worrying rate. The destructive fishing activities of humans in the South China Sea have caused ecosystem degradation and the extinction of some species, such as sea turtles, some sharks and another species. Other fish, especially the giant mussel, the consequence is a decrease in the natural capital of the sea, leading too prolonged "ecological disturbances". The reserves of seafood in the Spratly region (of Vietnam) and the West Sea in the East Sea have decreased by about 19% compared to before 2017. Therefore, the improvement of marine environment quality, including biodiversity conservation and major marine ecosystems are to preserve marine natural assets, contributing to the implementation of Vietnam's green growth strategy and action plan. This is the path that Vietnam has chosen to both grow marine economy, adapt to climate change, and protect the environment both in the short and long term, towards sustainable development.</p> Thi Minh Hao Dong Huu Cuong Le Thanh Hai Truong Copyright (c) 2019 Thi Minh Hao Dong, Huu Cuong Le, Thanh Hai Truong http://creativecommons.org/licenses/by/4.0 2019-09-15 2019-09-15 4 9 70 74 10.24018/ejers.2019.4.9.1517 Development of a Naturally Flavored Ready to Serve (RTS) Fruit Beverage https://ejers.org/index.php/ejers/article/view/1338 <p>Fruit based beverages are one of the foremost categories of beverages that are consumed globally. Since fruit beverages are easily digestible, health conscious, highly refreshing, thirst quenching, appetizing and nutritionally far superior to most of the synthetic beverages available in the market, consumption of fruit based beverages have been increased dramatically. Natural extracts of tropical fruits such as <em>Carica papaya (</em>papaya)<em>, Passiflora edulis </em>(passion fruit), and natural flavor extract of <em>Camellia sinensis </em>(leaves) and <em>Cinnamomum verum </em>(Cinnamon barks) were extracted and used as the main ingredients of this product while sugar, Citric acid, pectin were used as the supplementary ingredients. The best fruit pulp ratio and the best natural flavoring agent out of tea and cinnamon was determined through structured sensory evaluations by participating 30 semi trained panelists. Further experiments were also performed&nbsp;&nbsp; to find the optimum amount of pectin to reduce hard packing and to determine the shelf life of the developed beverage and to develop the natural pectin extraction method by using unutilized parts of the <em>Passiflora edulis fruit. </em>Proximate analysis studies and microbiological studies were also carried out. Collected data were statistically analyzed using Kruskal-Wallis non parametric analysis and sample 293 which is containing 15% total fruit pulp with papaya to passion fruit ratio 2:1 and cinnamon as the flavoring agents was the best product formulae. According to the proximate analysis data, fat, protein, carbohydrates, fiber and the ash content were 0.41%, 0.11%, 13.13%, 0.052%, 3.028% and 83.27% respectively. The total plate count was 12 cfu/ml and yeast and molds were 0 cfu/ml of the product and Physico-chemical studies reveals that, the product can be preserved for 30 days under 4±1 <sup>0</sup>C condition. The average pectin percentage of <em>Passiflora edulis </em>and <em>Carica papaya </em>were 6.9 % and 4.5 % respectively.</p> K. N. Karunarathne Rumesh Prasanga Liyanage Indira Wickramasinghe Copyright (c) 2019 K. N. Karunarathne, Rumesh Prasanga Liyanage, Indira Wickramasinghe http://creativecommons.org/licenses/by/4.0 2019-09-15 2019-09-15 4 9 75 77 10.24018/ejers.2019.4.9.1338 Generation of UV Photons Produced by Lightning in Vacuum Conditions: https://ejers.org/index.php/ejers/article/view/1400 <p>In the following work, a theoretical proposal is presented on the mechanism of generation UV photons produced by lightning in vacuum conditions under anisotropic medium (gas) using the quantum model of near field electrodynamics through paths integrals. The aim is calculate and sensing the number of photons that can generate a lightning discharge under a voltage of 2000 volts AC in t seconds</p> Omar Rodriguez Pinilla Wilmar Hernández Copyright (c) 2019 Omar Rodriguez Pinilla, Wilmar Hernández http://creativecommons.org/licenses/by/4.0 2019-09-16 2019-09-16 4 9 78 80 10.24018/ejers.2019.4.9.1400 Implementation of 1024-point FFT Soft-Core to Characterize Power and Resource Parameters in Artix-7, Kintex-7, Virtex-7, and Zynq-7000 FPGAs https://ejers.org/index.php/ejers/article/view/1515 <p>This Paper presents implementation of 1024-point Fast Fourier Transform (FFT). &nbsp;The MatLab simulink environment&nbsp; approach is used to implement the complex 1024-point FFT. The FFT is implemented on different FPGAs such as the following four: Artix-7, Kintex-7, Virtex-7, and Zynq-7000. The comparative study on power and resource consumption has been carried out as design parameters of prime concern. The results show that Artix-7 FPGA &nbsp;consumes less power of 3.402W when compared with its contemporary devices, mentioned above. The resource consumption remains same across all the devices. The resource estimation on each FPGA is carried on and its results are presented for 1024-point FFT function implementation. This Comprehensive analysis provides a deep insight with respect to power and resources. The synthesis and implementation results such as RTL Schematic, I/O Planning, and Floor Planning are generated and analyzed for all the above devices.</p> K. S. Shashidhara H. C. Srinivasaiah Copyright (c) 2019 K. S. Shashidhara, H. C. Srinivasaiah http://creativecommons.org/licenses/by/4.0 2019-09-16 2019-09-16 4 9 81 88 10.24018/ejers.2019.4.9.1515 Impact of Machine Parameters on Knit Fabric GSM and Shrinkage https://ejers.org/index.php/ejers/article/view/1497 <p>Knitted fabrics have a tendency to undergo some dimensional changes and GSM variation due to different knitting parameters. The investigation was carried out to relate the effect of different yarn counts, stitch lengths, machine gauge on fabric thickness variation and shrinkage behavior of the fabric. In this study the experimental results showed that fabric GSM varies as machine gauge changes by using same yarn count. On the contrary, when machine gauge and yarn count was fixed, the changes of fabric GSM was very negligible. For finer yarn count with different machine gauge GSM variation is more compared to coarser yarn count. But with same machine gauge GSM was very closer for both of finer and coarser yarn count. Fabric shrinkage both in lengthwise and widthwise is more fore finer yarn count than coarser yarn count. This study supports that, selection yarn count and calculation of stitch length was not only the way to meet buyer requirements regarding fabric thickness and shrinkage properties. The results found from this work will guide the determination to pick up right machine gauge, management of correct yarn diameter along with meticulous stitch length estimation.</p> Mohammad Mohsin Ul Hoque Md. Anisuzzaman Rassel Copyright (c) 2019 Mohammad Mohsin Ul Hoque, Md. Anisuzzaman Rassel http://creativecommons.org/licenses/by/4.0 2019-09-16 2019-09-16 4 9 89 92 10.24018/ejers.2019.4.9.1497 Barcode Image Restoration for Recognition of Product Information https://ejers.org/index.php/ejers/article/view/1522 <p>Barcode attached on product is to transfer information to users. In practice, many barcodes are degraded over time and they are difficult for users to recognize product information. Therefore, barcode image restoration plays an important role due to clearly showing product information for users. This paper proposed a restoration approach of barcode- EAN 13 images with different degraded characteristics such as vertical lines, blurring, dashed lines. In particular, the degraded barcode images are pre-processed for restoring before recognition, in which a radon method is applied for rotating barcode image and an Otsu segmentation method is employed to split the barcode image from an original image. Therefore, bars in each barcode image are determined for recognition of the correct barcode. Barcode image datasets are collected from different practical products with different quality for restoration before recognizing them. Experimental results show to illustrate the proposed approach for the barcode recognition is the effectiveness</p> Dung D. Vo Duy T. Nguyen Hai Thanh Nguyen Viet B. Ngo Copyright (c) 2019 Dung D. Vo, Duy T. Nguyen, Hai Thanh Nguyen, Viet B. Ngo http://creativecommons.org/licenses/by/4.0 2019-09-19 2019-09-19 4 9 93 100 10.24018/ejers.2019.4.9.1522 Structural Performance of Externally Strengthened Rectangular Reinforced Concrete Beams by Glued Steel Plate https://ejers.org/index.php/ejers/article/view/1480 <p>This paper examines both flexural and shear behaviour of eight full-scale (2700×160×100-mm) reinforced concrete rectangular beams subjected to one-third point load. Two types of beams were investigated; Type-E and Type-C. Type-E are reinforced concrete rectangular beams strengthened externally by 1.5mm thick structural steel plate glued to the tensile face with epoxy as adhesive while type-C are reinforced concrete rectangular beams without structural steel plate glued to the tensile face. An average concrete strength of 30N/mm<sup>2</sup> at 28 days was used. Required internal reinforcement according to BS 8110-1:1997 was provided for the concrete rectangular beams. Before the beams were externally strengthened, the beam surface to be plated was gritted to take off the cement membrane and to open up the aggregates. Epoxy adhesive was applied as a paste to both the plate and concrete surfaces: the two surfaces were then put together and held in place under pressure of 3.84kN/m<sup>2</sup> until the glue was cured.&nbsp; The beams were subjected to flexural testing after 28 days, using loading frame. Each of the rectangular beams support at both ends were subjected to one-third point load, deflection readings were recorded using a dial gauge at every 1.82kN increment. At ultimate load, the beams failed by a crack initiated at the bottom fiber of the beams. From the test results, an average flexural and shear strengths of Type-C beams are; 21.91N/mm<sup>2 </sup>and 1.05N/mm<sup>2</sup> respectively, while type-E beams are; 28.91N/mm<sup>2</sup> and 1.39N/mm<sup>2</sup> respectively. The results of the investigation showed that flexural and shear strengths of reinforced concrete rectangular beam increased when strengthened externally by bonded steel plate. A straightforward analytical procedure was developed to validate the experiment results of type-E and type-C beams, using rectangular stress block for concrete. Experimental average failure load for beams Type-C and Type-E are 22.44kN and 29.60kN respectively while theoretical failure load for Type-C and Type-E beams are 20.86kNand 31.2kN respectively. Generally, there were acceptably fair correlations between analytical and experimental failure loads of Type-C and Type-E beams.</p> A. T. John E. Nwankwo Solomon Teminusi Orumu S. O. Osuji Copyright (c) 2019 A. T. John, E. Nwankwo, Solomon Teminusi Orumu, S. O. Osuji http://creativecommons.org/licenses/by/4.0 2019-09-19 2019-09-19 4 9 101 106 10.24018/ejers.2019.4.9.1480 The Crisis of Plastic Waste in Vietnam is Real https://ejers.org/index.php/ejers/article/view/1523 <p>The issue of "white pollution" at popular tourist destinations of environmental pollution is rising at an alarming rate. According to statistics, Vietnam currently ranks fourth in the world in volume of plastic waste, with approximately 730,000 tons of plastic waste going to the sea every year. Vietnam is also known as a country with twice the amount of plastic waste compared to low-income countries. Plastic waste in the ocean will destroy the natural environment, negatively affecting the lives of aquatic products. On land, plastic waste is abundant in many places and has serious impacts on human health and life. Analysts point out that, if the pace of use of plastic products continues to increase, there will be an additional 33 billion tons of plastic produced by 2050 and thus more than 13 billion tons of plastic waste will be buried. backfill into landfills or into the ocean. Meanwhile, the recycling of Vietnam's plastic waste, has not been developed. The rate of waste sorting at the source is very low, most types of waste are put together and collected by waste trucks. Plastic recycling technology used in Vietnam's major cities is outdated, low in efficiency, high in costs and polluting the environment. The paper presents the current situation of plastic waste in Vietnam as of June 2019. The authors focus on highlighting the serious "white pollution" in Vietnam, a country with a very long coastline. But the coast is really threatened by plastic waste. This is really a wake-up call to the authorities about the promulgation of policies and the people on the morality of survival with nature.</p> Thanh Hai Truong Hai Nam Vu Copyright (c) 2019 Thanh Hai Truong, Hai Nam Vu http://creativecommons.org/licenses/by/4.0 2019-09-19 2019-09-19 4 9 107 111 10.24018/ejers.2019.4.9.1523 Traffic Congestion https://ejers.org/index.php/ejers/article/view/1524 <p>Congestion is essentially a relative phenomenon that is linked to the difference between the roadway system performance that users expect and how the system actually performs. The approach to traffic congestion (TC) from the different perspectives of countries around the world helps Vietnamese experts to better understand and come up with a consensus on how to understand the problem. this topic. Since then, in the management of traffic safety and control, to curb traffic congestion, traffic police and other departments have the basis to perform the work, properly assess the level of traffic safety to implement the task; doing well the reporting, statistics, building databases on TC; create integration in the context of international cooperation with other countries. Solving the problem of traffic congestion in large cities in Vietnam is a problem that cannot be solved overnight. This problem requires the synchronous participation of many ministries, branches and people in traffic. All measures need to get feedback from the people, thoroughly resolve the critic before implementation. This article briefly presents the situation of traffic congestion in Hanoi and Ho Chi Minh City. The team also focused on analyzing the causes of traffic congestion and proposed solutions to solve this urban problem.</p> Minh Quyen Nguyen Thi Thanh Xuan Pham Thi Thuy Hoa Phan Copyright (c) 2019 Minh Quyen Nguyen, Thi Thanh Xuan Pham, Thi Thuy Hoa Phan http://creativecommons.org/licenses/by/4.0 2019-09-19 2019-09-19 4 9 112 116 10.24018/ejers.2019.4.9.1524 Urban Transport in Vietnam: https://ejers.org/index.php/ejers/article/view/1525 <p>Environmental pollution has become a problem not only for one nation, one region but also for the common concern of all humanity. The process of socio-economic development of the countries in the world has led to tremendous impacts on the environment, causing the human environment to change and become increasingly degraded. important. These are climate change - global warming, depletion of the ozone layer and acid rain ... especially air pollution caused by transportation. In Vietnam, environmental pollution in big cities is becoming a pressing problem. The problem of overcrowding of transport in big cities, which has been very difficult, now adds a serious situation of pollution that is increasing to worrying levels. What a challenging problem that is posing on the shoulders of managers. The paper presents the realities of environmental pollution, especially air pollution from vehicle emissions. Besides, also initially offering solutions to reduce pollution caused by urban transport in Vietnam.</p> Thi Hoa Nguyen Thi Thuy Hoa Phan Copyright (c) 2019 Thi Hoa Nguyen, Thi Thuy Hoa Phan http://creativecommons.org/licenses/by/4.0 2019-09-19 2019-09-19 4 9 117 122 10.24018/ejers.2019.4.9.1525 A Vision for Vietnam in the Revolution 4.0: https://ejers.org/index.php/ejers/article/view/1526 <p>The fourth industrial revolution, also known as the digital revolution, has taken place since the beginning of the 21st century. The characteristic of this industrial revolution is the increasing popularity of artificial intelligence and automated machines. chemistry, bringing a combination of virtual systems and reality. This revolution has a strong impact on many fields and many aspects of social life, in which a special human resource of high quality is indispensable; but human resources are the direct object of education – training. Education and training play an important role as a key factor and a driving force for the development of the economy. Not only in Vietnam but also in most other countries in the world, governments consider education as a top national policy. So why is education and training so important to the country's development strategy? The quality of Vietnamese education is really alarming in all aspects. If we don't recognize the true nature of the problem, if we just want to have great achievements, want our students to be rewarded and forget about the problem, the future of education will have a lot of defective products. The future of education is the future of the country, the future of every family. Therefore, each person in different positions but with the sincerity of education to join hands will hope for the change. The content of this article will revolve around the inadequacies of Vietnamese education about the status quo, about the reasons why Vietnamese education has not kept up with international friends, thereby proposing solutions for difficulties. the current challenges of the Vietnamese education industry, and the need for innovative reforms to fulfill the mission of the education sector. Good coordination between the three environments including family, school and society will be the key to solving the problem of improving the quality of education in Vietnam. That is the objective of this paper, as the solution improves the connection and interaction efficiency of the three environments mentioned above<strong><em>.</em></strong></p> Minh Thi Vu Thi Minh Hao Dong Copyright (c) 2019 Minh Thi Vu, Thi Minh Hao Dong http://creativecommons.org/licenses/by/4.0 2019-09-19 2019-09-19 4 9 123 128 10.24018/ejers.2019.4.9.1526 Policy for Industrial Development in Era 4.0 In Some Pioneering Countries and Proposing to Vietnam https://ejers.org/index.php/ejers/article/view/1527 <p>Vietnam is considered to be a country with the advantage of a young and abundant labor force, which will not be a strength because robots will replace all manual jobs. In the future, people will lose their jobs, because robot technology can affect all industries such as textiles, services, entertainment to health, transportation, education. The paper analyzes policies that pave the way for 4.0 industry development in the eight most representative countries of the European Union. The author points out the most basic content and clarifies the key points of the policy that the so-called countries have followed, including identifying policy space, pursuing goals, and supply. funding, efficiency brought about, the focus and impacts of policies, governance and implementation, specific barriers and obstacles in each country. From there, draw lessons learned in planning, as well as implementing policies at the national level on industry 4.0 in Vietnam today. The author also made some suggestive suggestions about the policy direction to create a solid condition for Industry 4.0 to develop<strong><em>. </em></strong></p> Phan Thi Thuy Hoa Nguyen Thi Hoa Pham Thi Minh Chau Copyright (c) 2019 Phan Thi Thuy Hoa, Nguyen Thi Hoa, Pham Thi Minh Chau http://creativecommons.org/licenses/by/4.0 2019-09-19 2019-09-19 4 9 129 134 10.24018/ejers.2019.4.9.1527 Popular Coastal Environment Issues and Orientation for Solutions in Vietnam https://ejers.org/index.php/ejers/article/view/1528 <p>The process of interaction and exchange of material between continents and oceans in coastal areas (DVB) creates a dynamic balance on environment, ecology and natural resource structure. Due to anthropogenic impacts and climate change, this balance is disrupted and leads to many negative consequences. The coastal area of ​​Vietnam is located in the monsoon tropical region where large rivers with basins in six countries enter and the outer sea has ecological and environmental relations with the waters of many countries in the region. This is a very sensitive area and ecosystems, especially coral reefs, mangroves, seagrass beds, etc. very vulnerable to environmental impacts. Along with economic development and population growth, humanitarian activities have a major impact on the coastal environment. People, environment and coastal ecosystems are also affected by abnormal climatic and hydrological changes that have recently increased. Not to mention the risk of natural disasters, including volcanoes, earthquakes and tsunamis, has not been fully assessed. Environmental stresses and coastal catastrophes are generated not only locally but also from continents and oceans. Therefore, the strategy for coastal environmental protection needs to be viewed from the macro-relations of the continental-ocean interaction in the coastal region.</p> Nguyen Van Quy Thi Minh Hao Dong Copyright (c) 2019 Nguyen Van Quy, Thi Minh Hao Dong http://creativecommons.org/licenses/by/4.0 2019-09-19 2019-09-19 4 9 135 142 10.24018/ejers.2019.4.9.1528 Some Matters relating to Urban Management aiming to Reduction of Environmental Pollution https://ejers.org/index.php/ejers/article/view/1529 <p>Urban areas are constantly developing and rapidly, especially in recent times. According to the United Nations, in 1950 the global urban population accounted for only 29% of the world's population; this figure was 50% in 2009 and will be 60% in 2030 with about 5 billion people. In Vietnam, urban population is projected to account for 38% of the country's population by 2015, 45% of the country's population in 2020 and 50% of the national population by 2025 with about 25 million. In the process of urbanization with growth and development, cities often face significant challenges. These are: 1) Unbalanced development, over-focus on large cities makes the development gap between urban and rural areas more and more increasing; 2) Unsustainable development, rapid technical and social infrastructure systems degrading rapidly, especially housing and environmental sanitation; 3) The administrative management capacity of urban governments must often chase the rapid growth of urban areas; 4) Poverty, crime and unemployment often occur in rapidly growing cities but lack solid economic and technical bases. In order to have an identity of sustainable urban development, development cannot be separated from preserving stability in which urban management is always a very important task.</p> Cong Tri Tran Van Huong Dong Copyright (c) 2019 Cong Tri Tran, Van Huong Dong http://creativecommons.org/licenses/by/4.0 2019-09-19 2019-09-19 4 9 143 148 10.24018/ejers.2019.4.9.1529