Journal of Engineering and Sustainable Development最新文献_第9页

EVALUATION OF NITRATE REMOVAL FROM DAIRY WASTEWATER BY MEMBRANE DISTILLATION: A LABORATORY MODEL APPROACH 膜蒸馏法去除乳品废水中硝酸盐的实验室模型评价

Journal of Engineering and Sustainable Development Pub Date : 2023-01-03 DOI: 10.31272/jeasd.27.1.11

Ali A. Hasan

{"title":"EVALUATION OF NITRATE REMOVAL FROM DAIRY WASTEWATER BY MEMBRANE DISTILLATION: A LABORATORY MODEL APPROACH","authors":"Ali A. Hasan","doi":"10.31272/jeasd.27.1.11","DOIUrl":"https://doi.org/10.31272/jeasd.27.1.11","url":null,"abstract":"The dairy industry is considered one of the main industries not only in Iraq in particular but throughout the world. Different treatment methods have been used over time and in different countries. Here, membrane distillation has been used to treat wastewater generated by this industry to reduce the burden on the environment. In this paper, direct membrane distillation was used to remove nitrates from wastewater discharged from dairy plants. This method is easy to operate, easy to manage, and has many economic benefits. This article has been using the HACH instrument with all kits needed to achieve the tests. For determination of nitrates in samples by the Calmagite Colorimetric method. HACH Method 8030. 100 mL Marked Dropping Bottle. All other instruments have been achieved according to APHA, AWWA, and WEF. On the other hand, scanning electron microscopy (SEM) has been used to watch the formation of nitrate on membrane surfaces. The results obtained in treating the samples that were synthesized and prepared according to the characteristics of dairy wastewater showed the ability of this method to remove nitrates by up to 80-85%, on the other hand, temperature affects the value of MD and is directly relative to flux. The temperature of the treated water plays an important role in determining the percentage of nitrate removal through the membrane, as well as the latter's enjoying chemical and physical features that give them positive points in its removal of wastewater when the liquid temperature had been raised.","PeriodicalId":33282,"journal":{"name":"Journal of Engineering and Sustainable Development","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43281852","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

DESIGN AND SIMULATION OF HIGH GAIN SEPIC DC–DC CONVERTER 高增益专用dc-dc变换器的设计与仿真

Journal of Engineering and Sustainable Development Pub Date : 2023-01-03 DOI: 10.31272/jeasd.27.1.12

Ihsan A. Mejbel, Turki K. Hassan

引用次数: 0

COMPARISON OF TIME AND TIME-FREQUENCY DOMAINS IMPULSIVE NOISE MITIGATION TECHNIQUES FOR POWER LINE COMMUNICATIONS 电力线通信时频域脉冲噪声抑制技术的比较

Journal of Engineering and Sustainable Development Pub Date : 2023-01-01 DOI: 10.31272/jeasd.27.1.6

A. Mohammed, Maher K. Mahmood Al-Azawi

{"title":"COMPARISON OF TIME AND TIME-FREQUENCY DOMAINS IMPULSIVE NOISE MITIGATION TECHNIQUES FOR POWER LINE COMMUNICATIONS","authors":"A. Mohammed, Maher K. Mahmood Al-Azawi","doi":"10.31272/jeasd.27.1.6","DOIUrl":"https://doi.org/10.31272/jeasd.27.1.6","url":null,"abstract":"Impulsive noise is one of the foremost situations in power line communications that degrades the performance of orthogonal frequency division multiplexing used for the power line communications channel. In this paper, a channel version of the broadband power line communications is assumed when evaluating the bit error rate performance. Three impulsive noise environments are assumed, namely heavily, moderately, and weakly disturbed. The well-known time domain mitigation techniques are tested first. These are clipping, blanking, and mixing clipping with blanking. The results of Matlab simulations show that these time-domain mitigation techniques don't significantly improve the bit error rate performance. A hybrid domain of time and frequency mitigation techniques are used to enhance the bit error rate performance. The Matlab simulation results show that this hybrid domain of time and frequency approach outperforms time domain nonlinearities and can largely improve the bit error rate performance. Signal-to-noise ratio gains of about 8 dB, 10 dB, and 10 dB are obtained for heavily, moderately, and weakly disturbed channels, respectively, using the domains of time and frequency mitigation technique at a bit error rate of when compared to the blanking time domain technique.","PeriodicalId":33282,"journal":{"name":"Journal of Engineering and Sustainable Development","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45599557","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

SHEAR TRANSFER BEHAVIOR OF FIBROUS CONCRETE 纤维混凝土的剪切传递特性

Journal of Engineering and Sustainable Development Pub Date : 2023-01-01 DOI: 10.31272/jeasd.27.1.9

Eman Jwad, W. A. Waryosh

{"title":"SHEAR TRANSFER BEHAVIOR OF FIBROUS CONCRETE","authors":"Eman Jwad, W. A. Waryosh","doi":"10.31272/jeasd.27.1.9","DOIUrl":"https://doi.org/10.31272/jeasd.27.1.9","url":null,"abstract":"Fibrous concrete's shear strength behavior is important in structural design. Brackets, corbels, and ledger beams are examples of concrete members that might collapse in shear. Such a failure might be brittle and sudden. Fibers improve concrete's behavior by increasing residual shear transfer and reducing crack development and extension. In an experimental study, nine push-off specimens were divided into three groups and examined as part of the experiment. Conventional concrete, conventional concrete with 1% glass fiber, and conventional concrete with 1% steel fiber were the groups. There were three push-off specimens with various shear reinforcement ratios in each of the groups that were examined (0.0, 0.45, and 0.68%). The specimens utilized had dimensions of 500mm x 250mm x 125mm. The vertical slip and horizontal separation at the shear plane were measured using two-stroke linear variable displacement transducers (LVDT). The effect of fiber type and the ratio of transverse reinforcement across the shear plane were the parameters evaluated. The presence of fibers enhances final shear strength, which is more obvious in specimens without stirrups in the shear plane. Where the addition of 1% of glass fiber to normal strength concrete increased ultimate shear strength by 32.26%, 12.38%, and 12.5%, while adding 1% of steel fiber to normal strength concrete increased ultimate shear strength by up to 53.22%, 19%, and 25%, respectively, for the specimens without stirrups, two stirrups, and three stirrups. The fibrous specimens were stiffer and ductile failure was seen. Steel fibers improved overall concrete shear behavior better than glass fibers.","PeriodicalId":33282,"journal":{"name":"Journal of Engineering and Sustainable Development","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45776867","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

Heat transfer augmentation by using different techniques in heat sinks: A review study 在散热器中使用不同技术增强传热：综述研究

Journal of Engineering and Sustainable Development Pub Date : 2023-01-01 DOI: 10.31272/jeasd.27.1.4

Hiba Khayoon Mohsen, N. Hamza

引用次数: 0

EVALUATION OF THE PROCUREMENT MANAGEMENT SYSTEM FOR RESIDENTIAL COMPLEX PROJECTS IN ERBIL GOVERNORATE 埃尔比勒省住宅综合体项目采购管理体系评价

Journal of Engineering and Sustainable Development Pub Date : 2023-01-01 DOI: 10.31272/jeasd.27.1.5

A. Mohammed

{"title":"EVALUATION OF THE PROCUREMENT MANAGEMENT SYSTEM FOR RESIDENTIAL COMPLEX PROJECTS IN ERBIL GOVERNORATE","authors":"A. Mohammed","doi":"10.31272/jeasd.27.1.5","DOIUrl":"https://doi.org/10.31272/jeasd.27.1.5","url":null,"abstract":"This study aims to evaluate the procurement management system of residential complex projects in Erbil Governorate by adopting a case study for (20) constructed projects during 2007-2019, to calculate the percentage of procurement management practice and the risks that have a significant impact on cost, time, and quality. Based on a literature review and discussion with experienced construction managers and procurement officers, a questionnaire has been designed which represents a successful plan for a procurement management system that consists of ten phases, each of five items, and the risk results associated with the improper practice. The questionnaire was delivered to stakeholders working on residential complex projects to calculate the average practice of procurement management. It is revealed that 70% of residential complex projects practiced procurement management process with a percentage below 50%. Which is considered below the acceptable rate. The average practice of procurement management phases ranges between 33% for procurement risk management and 58.5% for forecasting. The study reviled that the practice of procurement management affects the cost and time mostly. There are 26 risks that range between high and significant categories for cost and 22 risks range between high and significant categories for time. The most significant factors for procurement management are creating an appropriate risk response plan, integrating the procurement plan with the budgeting, scheduling procurement due to dates and quantities, using the tendering procedure, and procurement quality assurance. This study may contribute to solving problems for future projects by improving the current system.","PeriodicalId":33282,"journal":{"name":"Journal of Engineering and Sustainable Development","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45373722","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

THE INFLUENCE OF INFILL DENSITY AND SPEED OF PRINTING ON THE TENSILE PROPERTIES OF THE THREE DIMENSION PRINTING POLYLACTIC ACID PARTS 填充密度和打印速度对三维打印聚乳酸件拉伸性能的影响

Journal of Engineering and Sustainable Development Pub Date : 2023-01-01 DOI: 10.31272/jeasd.27.1.8

Muhammed Kasim Mehdi, Bashar Owed

引用次数: 0

REDUCING THE CROSS-POLARIZATION PATTERN IN A DUAL-POLARIZED ANTENNA USING SPIRAL AND SPLIT RING RESONATORS 利用螺旋和分环谐振器降低双极化天线的交叉极化方向图

Journal of Engineering and Sustainable Development Pub Date : 2022-11-04 DOI: 10.31272/jeasd.26.6.4

Sadiq K. Ahmed, Madhukar Chandra, Zaid A. Abdul hassain

引用次数: 0

A REVIEW ON BOND PERFORMANCE OF FRP-CONCRETE SYSTEM AT VARIOUS ENVIRONMENTAL CONDITIONS FRP混凝土体系在不同环境条件下的粘结性能研究进展

Journal of Engineering and Sustainable Development Pub Date : 2022-11-04 DOI: 10.31272/jeasd.26.6.6

R. Al-Safy

{"title":"A REVIEW ON BOND PERFORMANCE OF FRP-CONCRETE SYSTEM AT VARIOUS ENVIRONMENTAL CONDITIONS","authors":"R. Al-Safy","doi":"10.31272/jeasd.26.6.6","DOIUrl":"https://doi.org/10.31272/jeasd.26.6.6","url":null,"abstract":"Strengthening concrete structures with Fibre Reinforced Polymer (FRP) is one of the most commonly used technique to repair and rehabilitate concrete members due to the advanced properties of FRP over other conventional materials such as steel plates. The required performance of FRP-concrete system is linked to achieve proper bond between FRP and concrete substrates that as exposed to different environmental conditions. In the current paper, a review is conducted to highlight the most reported work by other researchers regarding the bond behavior of concrete members that strengthened with FRP in shear-tension and exposed to temperature-based conditions and compared with ambient conditions. The current review focused on the conducted work on FRP/concrete system that strengthened with two different installation techniques (externally bonding (ES) and near–Surface mounted (NSM)) using two different bonding agents (epoxy-based adhesive (EBA) and cement-based adhesive (CBA)) with and without modification. The adoption of two specific bond test procedures (adhesion and single lap shear tests) at ambient conditions and temperature-based conditions was also reviewed intensively to clarify the advantages and drawbacks associated with each test. Some reported findings by others in conducting bond test methods for different FRP/concrete systems were highlighted as well to address the gap in knowledge and the need for further research in this regard.","PeriodicalId":33282,"journal":{"name":"Journal of Engineering and Sustainable Development","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49550707","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

الاستثمار واستدامة التراث العمراني من خلال إعادة الاستخدام 通过再利用投资和可持续城市遗产

Journal of Engineering and Sustainable Development Pub Date : 2022-11-04 DOI: 10.31272/jeasd.26.6.8

أريج كريم مجيد السدخان, كاظم محسن إبراهيم

{"title":"الاستثمار واستدامة التراث العمراني من خلال إعادة الاستخدام","authors":"أريج كريم مجيد السدخان, كاظم محسن إبراهيم","doi":"10.31272/jeasd.26.6.8","DOIUrl":"https://doi.org/10.31272/jeasd.26.6.8","url":null,"abstract":"تناول البحث مفردتي الاستثمار واستدامة التراث العمراني، لا بكونهما متضادين (يمثل الاستثمار حالة الانعتاق عن هذا التراث)، وإنما بوصفهما مركبتي التطوير من خلال تطويع التراث العمراني لمواكبة متطلبات الحياة المعاصرة مع الإبقاء على الصورة التقليدية للتراث، يمثل الاستثمار أداة التطوير فيه. \u0000ان الاهتمام بالتراث العمراني واستدامته بوصفه فعاليةً اقتصادية بالمعنى الأعم ومشروعاً استثماريا بالمعنى الأخص، يتطلب تطوراً في قراءة قيم التراث لتشمل القيم الاقتصادية فيه والتي تعد من الدراسات الحديثة التي تبنى عليها الجدوى الاقتصادية للاستثمار في مشاريع التراث العمراني بغية استدامته. \u0000 تمثلت مشكلة البحث في: الحاجة الى تعميق المعرفة في طبيعة الدور الذي يلعبه الاستثمار من خلال اعادة الاستخدام في استدامة التراث العمراني. يهدف البحث الى: تعميق المعرفة في علاقة الاستثمار باستدامة التراث العمراني من خلال اعادة الاستخدام. من خلال فرضيته المتمثلة في: إن الاستثمار الامثل في التراث العمراني يكون من خلال أعادة استخدام هذا التراث وهو الاسهام الامثل في استدامته. \u0000تم تقصي هذه العلاقة والتعزيز بالأمثلة المحلية والعربية والعالمية للتوصل الى إن إعادة الاستخدام بوظائف سياحية أو ثقافية مطلوبة لدى المجتمع المحلي تعد الطريقة الاقتصادية الأمثل لاستدامة التراث المعماري لما توفره من تمويل ذاتي لمتطلبات الاستدامة، وتسهم في جعل هذا التراث حيوياً وفاعلاً في الحياة الاجتماعية، فضلا عن المنافع المجتمعية المترتبة عليه.","PeriodicalId":33282,"journal":{"name":"Journal of Engineering and Sustainable Development","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41740876","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