JST: Engineering and Technology for Sustainable Development最新文献

Electric-Based Heating System for Cold Start and Idling Performances Enhancement of Carburetor Engine Fueled with Bio-Ethanol 提高生物乙醇燃料化油器发动机冷启动和怠速性能的电加热系统

JST: Engineering and Technology for Sustainable Development Pub Date : 2024-07-15 DOI: 10.51316/jst.175.etsd.2024.34.3.5

T. N. Duy, K. Duc, Truc Nguyen The

引用次数: 0

Research on the Feet of Men with Diabetes as a Basis for Designing Shoes and Insoles 以男性糖尿病患者的足部研究为基础设计鞋和鞋垫

JST: Engineering and Technology for Sustainable Development Pub Date : 2024-07-15 DOI: 10.51316/jst.175.etsd.2024.34.3.7

Bui Van Huan, Le Khanh

{"title":"Research on the Feet of Men with Diabetes as a Basis for Designing Shoes and Insoles","authors":"Bui Van Huan, Le Khanh","doi":"10.51316/jst.175.etsd.2024.34.3.7","DOIUrl":"https://doi.org/10.51316/jst.175.etsd.2024.34.3.7","url":null,"abstract":"Diabetes is a dangerous chronic disease and often causes foot complications. Foot ulcers are a dangerous complication in patients with diabetes and lead to the risk of amputation. Shoes for diabetic patients play an important role in reducing the risk of foot ulcers. Therefore, diabetic patients need to use their own footwear, designed on the basis of anthropometric research and assessment of their foot complications. The article presents the method and results of measuring the feet and evaluating thier complications of 332 male diabetic patients over the age of 40. The patients' feet were measured at Khoai Chau district medical center, Hung Yen province and at National Hospital of Endocrinology. The results showed that diabetic foot complications in men with diabetes tend to get worse over time of illness. Foot complications/pathologies are the cause of differences in measurements of height, width and circumference of male diabetic foot. This difference was independent of the patient's age. According to foot complications, about 97.2% of male patients need to use “Extra Depth Diabetic Shoes”; 21.8% of patients required “Custom Molded Inlays/insoles”; and 3.2% of patients required “Custom Molded Diabetic Shoes” and “Custom Molded Inlays”.","PeriodicalId":17641,"journal":{"name":"JST: Engineering and Technology for Sustainable Development","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141833481","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

Numerical Simulation of the Low-Reynold Flow through Tandem Circular Cylinders with the Middle Flat Plate 通过带中间平板的串联圆柱体的低雷诺流的数值模拟

JST: Engineering and Technology for Sustainable Development Pub Date : 2024-07-15 DOI: 10.51316/jst.175.etsd.2024.34.3.6

Van Tuyen Vu, V. D. Duong, Ich Long Ngo

{"title":"Numerical Simulation of the Low-Reynold Flow through Tandem Circular Cylinders with the Middle Flat Plate","authors":"Van Tuyen Vu, V. D. Duong, Ich Long Ngo","doi":"10.51316/jst.175.etsd.2024.34.3.6","DOIUrl":"https://doi.org/10.51316/jst.175.etsd.2024.34.3.6","url":null,"abstract":"The paper describes an investigation of the dynamic behaviors of the fluid flow through tandem circular cylinders with a middle flat plate. A low Reynold number of 100, which originated from appropriate applications, is considered. The Lattice Boltzmann Method is used and implemented in the Direct Numerical Simulation. The numerical model was well-validated by comparing results from the literature for either a single circular cylinder or two tandem cylinders without flat plates. Consequently, the dynamic behavior of the fluid flow through tandem circular cylinders with a middle flat plate is first revealed in this study. The numerical results show that these behaviors are affected significantly by the presence of the middle flat plate. Moreover, the pattern of vortex formation is also affected considerably when this flat plate is mounted between two cylinders, and this pattern changes at the threshold value of plate size. Hydrodynamic coefficients and the Strouhal number generally decrease with the increase in flat plate size. These results are very useful in reducing the losses caused by vortex formation and increasing the fatigue durability in potential applications, such as ocean engineering and civil engineering.","PeriodicalId":17641,"journal":{"name":"JST: Engineering and Technology for Sustainable Development","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141832649","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

Some Chemical Components from Gnetum montanum Markgr. in Vietnam 越南 Gnetum montanum Markgr.的一些化学成分

JST: Engineering and Technology for Sustainable Development Pub Date : 2024-07-15 DOI: 10.51316/jst.175.etsd.2024.34.3.4

Nguyen Thi, V. Thanh, Dang Thanh, Tung

引用次数: 0

Analyzing Barriers to Reverse Logistics Systems for E-Commerce in Vietnam 分析越南电子商务逆向物流系统的障碍

JST: Engineering and Technology for Sustainable Development Pub Date : 2024-07-15 DOI: 10.51316/jst.175.etsd.2024.34.3.8

Tran Thi Huong, Ngo Thuy, Pham Thi Anh Dung, Tu

{"title":"Analyzing Barriers to Reverse Logistics Systems for E-Commerce in Vietnam","authors":"Tran Thi Huong, Ngo Thuy, Pham Thi Anh Dung, Tu","doi":"10.51316/jst.175.etsd.2024.34.3.8","DOIUrl":"https://doi.org/10.51316/jst.175.etsd.2024.34.3.8","url":null,"abstract":"Efficient reverse logistics management not only reduces costs but also plays a crucial role in creating added value for businesses and protecting the environment. The objective of this study is to explore and classify barriers and then prioritize them based on their importance using pairwise comparison methods. To this end, a two-stage mixed-methods research design was employed. The initial qualitative stage involved a comprehensive literature review to identify key themes and categorize them into five main barrier groups: government, organization and management methods, coordination in supply chain, finance and economics, and infrastructure. The subsequent quantitative stage utilized the Analytical Hierarchy Process (AHP) and Relative Importance Index (RII) to analyze and prioritize the specific barriers within these groups. The results show that the unclear organizational structure for reverse logistics activities, the lack of mechanisms and support from the government, and a lack of coordination from customers are the biggest barriers. This paper proposed solutions for the government and e-commerce businesses to eliminate barriers and operate efficiently reverse logistics systems.","PeriodicalId":17641,"journal":{"name":"JST: Engineering and Technology for Sustainable Development","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141832959","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

"Synthesis of Zero-Valent Iron Nanoparticles on Polyester Non-Woven Fabric Using Green Chemistry Method for Wastewater Treatment in the Textile Dyeing Industry" "利用绿色化学方法在涤纶无纺布上合成零价铁纳米颗粒，用于纺织印染行业的废水处理"

JST: Engineering and Technology for Sustainable Development Pub Date : 2024-07-15 DOI: 10.51316/jst.175.etsd.2024.34.3.3

Duong Thi Hong, Bui Thi Ngoc, Bich, Van Dinh, Son Tho, Nguyen Nhat Trinh, Dang Trung Dung

{"title":"\"Synthesis of Zero-Valent Iron Nanoparticles on Polyester Non-Woven Fabric Using Green Chemistry Method for Wastewater Treatment in the Textile Dyeing Industry\"","authors":"Duong Thi Hong, Bui Thi Ngoc, Bich, Van Dinh, Son Tho, Nguyen Nhat Trinh, Dang Trung Dung","doi":"10.51316/jst.175.etsd.2024.34.3.3","DOIUrl":"https://doi.org/10.51316/jst.175.etsd.2024.34.3.3","url":null,"abstract":"Wastewater from the dyeing process is causing serious issues for the ecosystem and humans. Zero-valent iron nanoparticles have been proven as a promising material for environmental treatment through numerous previous studies. In this research, green-synthesized zero-valent iron nanoparticles were obtained from the leaf extract of the Cleistocalyx operculatus. These nanoparticles were then applied onto polyester non-woven fabric with alginate coating on the fabric surface. The polyester nonwoven fabric used in this study was (poly ethylene terephthalate) (PET) needle-punched non-woven fabric. The modified polyester non-woven fabric with alginate and zero-valent iron nanoparticles (PET/Alginate/nZVI), alginate-coated polyester non-woven fabric (PET/Alginate), and the original polyester non-woven fabric (PET) were evaluated for morphology and structure using scanning electron microscopy (SEM) and Fourier-transform infrared spectroscopy (FTIR). The capability of removing the organic dye Rhodamine B was assessed through UV-Vis spectroscopy. The influence of iron dosage, solution concentration, and solution pH on the dye removal capacity of the material was investigated. Results show that the material has been successfully synthesized for high-performance removal of Rhodamine B dye with an efficiency of 98% after 10 minutes of treatment, and it can be reused multiple times with an efficiency of over 70%.","PeriodicalId":17641,"journal":{"name":"JST: Engineering and Technology for Sustainable Development","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141832970","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

Adsorptive Removal and Photo-Fenton Degradation of Congo Red Dye from Water Using Modified Gadolinium Orthoferrite 利用改性钆正铁吸附去除和光-芬顿降解水中的刚果红染料

JST: Engineering and Technology for Sustainable Development Pub Date : 2024-07-15 DOI: 10.51316/jst.175.etsd.2024.34.3.1

Thi To, Nga Phan, Thi Thu, Huyen Nguyen

{"title":"Adsorptive Removal and Photo-Fenton Degradation of Congo Red Dye from Water Using Modified Gadolinium Orthoferrite","authors":"Thi To, Nga Phan, Thi Thu, Huyen Nguyen","doi":"10.51316/jst.175.etsd.2024.34.3.1","DOIUrl":"https://doi.org/10.51316/jst.175.etsd.2024.34.3.1","url":null,"abstract":"GdFeO3-incoporated zeolite (GFO/Z) was successfully prepared by the impregnation method followed by the calcination process and used for adsorption and photo-Fenton degradation of Congo Red (CR). The as-prepared GFO/Z material was characterized by X-ray Diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Brunauer–Emmett–Teller (BET) surface area, and optical absorption spectra (UV-Vis). The large specific surface area and accessible pores supported its high performance towards the adsorption of CR . Besides, due to its low band gap energy, the photo-Fenton catalytic activities of GFO/Z were also investigated for the degradation of CR under visible light irradiation. The use of GFO/Z led to a high removal rate (97.46%) of CR thanks to the synergistic effect between effective dark adsorption and visible-light-driven Fenton degradation, which was greater than those of pure GFO. Scavenger experiments were performed to reveal that the hydroxyl radicals (•OH) were the main active species in the photo-Fenton catalytic process. This work showed a promising application of GFO/Z in the degradation of organic compounds in wastewater.","PeriodicalId":17641,"journal":{"name":"JST: Engineering and Technology for Sustainable Development","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141832979","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

Fabrication of Graphene Oxide for Application in Removing Tetracycline Hydrochloride in Aqueous Solution 制造用于去除水溶液中盐酸四环素的氧化石墨烯

JST: Engineering and Technology for Sustainable Development Pub Date : 2024-07-15 DOI: 10.51316/jst.175.etsd.2024.34.3.2

Nguyen Thu, Huong, Võ Linh, Nguyen Ngoc, Thinh, Le Dieu, Tran Thi, Thu Huyền, N. Viet, Le Van Dung, Tran Vinh Hoang, Vu Anh, Tuan

{"title":"Fabrication of Graphene Oxide for Application in Removing Tetracycline Hydrochloride in Aqueous Solution","authors":"Nguyen Thu, Huong, Võ Linh, Nguyen Ngoc, Thinh, Le Dieu, Tran Thi, Thu Huyền, N. Viet, Le Van Dung, Tran Vinh Hoang, Vu Anh, Tuan","doi":"10.51316/jst.175.etsd.2024.34.3.2","DOIUrl":"https://doi.org/10.51316/jst.175.etsd.2024.34.3.2","url":null,"abstract":"Recently, antibiotic pollution has been recognized as an aquatic environmental pollution, due to its potential adverse effects on ecosystems and human health. Therefore, it is necessary to have an effective and environmentally friendly method to remove antibiotic residues in the aquatic environment. In this study, Graphene oxide (GO) was synthesized for the treatment of antibiotic residues in the aquatic environment. The characteristics of GO material were analyzed by the X-ray diffraction (XRD), Scanning electron microscopy (SEM), and Transmission electron microscopy (TEM, JEM-JEOL 2100) methods. The GO material was used for the adsorption of tetracycline hydrochloride (TCH) in an aqueous environment. The adsorption equilibration time is 30 min and an efficiency of approximately 88.57% with an initial TCH concentration of 20 mg/L. The factors that affect the adsorption process were investigated including the initial TCH concentration (10 to 40 mg/L), the GO dosage (0.1 to 0.5 g/L), and the pH solution (1 to 9). The adsorption process of TCH on GO material is consistent with the Freundlich isotherm model with a maximum adsorption capacity of 65.65 mg/g. The TCH adsorption process of GO material is exothermic.","PeriodicalId":17641,"journal":{"name":"JST: Engineering and Technology for Sustainable Development","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141833380","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

Initial Research on the 1%CuO – 6CeO2 – 4ZrO2 Catalysts by TPR-H2 for the Carbon Monoxide Preferential Oxidation (CO-PROX Reaction) 通过 TPR-H2 对一氧化碳优先氧化（CO-PROX 反应）的 1%CuO - 6CeO2 - 4ZrO2 催化剂的初步研究

JST: Engineering and Technology for Sustainable Development Pub Date : 2024-03-15 DOI: 10.51316/jst.172.etsd.2024.34.1.5

Ta Dinh Quang, Vuong Thanh Huyen, Le Minh Thang

{"title":"Initial Research on the 1%CuO – 6CeO2 – 4ZrO2 Catalysts by TPR-H2 for the Carbon Monoxide Preferential Oxidation (CO-PROX Reaction)","authors":"Ta Dinh Quang, Vuong Thanh Huyen, Le Minh Thang","doi":"10.51316/jst.172.etsd.2024.34.1.5","DOIUrl":"https://doi.org/10.51316/jst.172.etsd.2024.34.1.5","url":null,"abstract":"The 1wt%CuO – 6CeO2 – 4ZrO2 catalysts were synthesized by sol-gel method with two different procedures: (i) impregnating CuO on CeO2-ZrO2 support (CuO/CeO2-ZrO2), (ii) sol-gel of the Cu, Ce and Zr precursor together (CuO-CeO2-ZrO2). These catalysts were applied for the preferential oxidation of carbon monoxide (CO-PROX) to remove a small quantity of CO in an H2-rich stream (the new research direction in Viet Nam), fueling the proton exchange membrane fuel cell (PEMFC) energy system. The findings of the TPR-H2 experiment indicated that the catalyst produced through the first method exhibited an α reduction peak at 174 °C, which shows the effective dispersion of copper species. In combination with EPR results, the author anticipates a significant dispersion arising from isolated copper, which is recognized as a pivotal site in the CO-PROX reaction per numerous reputable studies. The catalyst synthesized by the second method did not provide a clear indication of the oxidation behavior of Cu-species. Therefore, it can be inferred that this catalyst is inappropriate for the low-temperature CO-PROX reaction.","PeriodicalId":17641,"journal":{"name":"JST: Engineering and Technology for Sustainable Development","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140391954","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 model-Based Mechatronic System Design and Integration Process 基于模型的机电一体化系统设计与集成流程

JST: Engineering and Technology for Sustainable Development Pub Date : 2024-03-15 DOI: 10.51316/jst.172.etsd.2024.34.1.8

Giang-Nam Le, Tra-Giang Nguyen

{"title":"A model-Based Mechatronic System Design and Integration Process","authors":"Giang-Nam Le, Tra-Giang Nguyen","doi":"10.51316/jst.172.etsd.2024.34.1.8","DOIUrl":"https://doi.org/10.51316/jst.172.etsd.2024.34.1.8","url":null,"abstract":"In contemporary mechatronic product development, embracing an interdisciplinary approach has become imperative to manage potential integration risks. This research paper introduces a viable solution that combines Automation Studio and the VDI 2206 methodology to design mechatronic systems. The study's findings highlight the efficacy of this interdisciplinary approach in effectively addressing early challenges associated with multi-domain integration. It enables simultaneous evaluation and resolution of limitations inherent in traditional design methods. Successfully applied to develop an automated garment folding machine with a PLC controller, the proposed process proves to be a valuable tool in optimizing mechatronic system development. The system, designed using this process, relies on a real-time computational model as its foundation, laying the groundwork for constructing a digital twin in the future. This ensures a comprehensive representation of the system, facilitating enhanced understanding and performance assessment during the development and operational phases. The adoption of such an approach signifies a significant step forward in advancing mechatronic engineering and ensuring the successful realization of complex and efficient systems.","PeriodicalId":17641,"journal":{"name":"JST: Engineering and Technology for Sustainable Development","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140391693","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