TRA VINH UNIVERSITY JOURNAL OF SCIENCE; ISSN: 2815-6072; E-ISSN: 2815-6099最新文献_第8页

COMPARING THE FINANCIAL EFFICIENCY OF TRADITIONAL VERSUS ORGANIC RICE FARMING IN TIEU CAN DISTRICT, TRA VINH PROVINCE, VIETNAM 比较越南越共省忠灿区传统与有机水稻种植的财务效率

TRA VINH UNIVERSITY JOURNAL OF SCIENCE; ISSN: 2815-6072; E-ISSN: 2815-6099 Pub Date : 2022-06-29 DOI: 10.35382/tvujs.1.47.2022.920

Thai Hoa Dang

引用次数: 0

INVESTIGATION ON HYDROLOGIC PERFORMANCE OF PERVIOUS CONCRETE PAVEMENT BY FINITE ELEMENT ANALYSIS 透水混凝土路面水文性能的有限元分析研究

TRA VINH UNIVERSITY JOURNAL OF SCIENCE; ISSN: 2815-6072; E-ISSN: 2815-6099 Pub Date : 2022-03-28 DOI: 10.35382/tvujs.1.46.2022.862

Hung T. Nguyen, Truong Phu Nguyen, Tan Nhat Phan, P. T. Tran, Phu Ba Nguyen

{"title":"INVESTIGATION ON HYDROLOGIC PERFORMANCE OF PERVIOUS CONCRETE PAVEMENT BY FINITE ELEMENT ANALYSIS","authors":"Hung T. Nguyen, Truong Phu Nguyen, Tan Nhat Phan, P. T. Tran, Phu Ba Nguyen","doi":"10.35382/tvujs.1.46.2022.862","DOIUrl":"https://doi.org/10.35382/tvujs.1.46.2022.862","url":null,"abstract":"Pervious concrete pavement has been used widely as an effective practice for water management in low-impact development techniques. The hydrologic performance of pervious concrete pavement depends significantlyon the rainfall intensity and the designed slope. This study assessed the hydrologic performance of pervious concrete pavement by evaluating the time for surface ponding via finite element analysis. A series of simulations were carried out to explore the relationship between hydrologic performance and pervious concrete pavement by the Hydrus 2D program. The research’s results showed that as the slope increased, the time of surface ponding also increased. The data indicated that the slope variable had a low impact on the water level in pervious concrete pavement under a constant rainfall intensity. Observation of the effect of rainfall intensity showed that when the rainfall intensity increased twofold, the time for surface ponding dropped about two times. Furthermore, when surface ponding appeared, pervious concrete pavement at higher rainfall intensity had lower water content. The rainfall intensity also significantly affects the hydrologicperformance of the pervious concrete pavement. This study only assessed the hydrologic performance by using the time for surface ponding via finite element analysis. Further experimental studies should be conducted to examine the relationship of other factors to the hydrologic performance of pervious concrete pavement.","PeriodicalId":159074,"journal":{"name":"TRA VINH UNIVERSITY JOURNAL OF SCIENCE; ISSN: 2815-6072; E-ISSN: 2815-6099","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133665785","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

THE BUILDING OF SAND MOUNTAIN CEREMONY: SYMBOL OF RELIGIOUS CULTURE AT THE KHMER NEW YEAR IN SOUTHERN VIETNAM 建沙山仪式:南越高棉新年宗教文化的象征

TRA VINH UNIVERSITY JOURNAL OF SCIENCE; ISSN: 2815-6072; E-ISSN: 2815-6099 Pub Date : 2022-03-28 DOI: 10.35382/tvujs.1.46.2022.916

D. Son

引用次数: 0

REASERCH ON DETERMINATION FOR THE LIMITED COMPRESSIVE STRENGTH AND BENDING MOMENT OF THE STEEL COLUMN BASE USING EFFECTIVE AREA PANDEMIC 利用有效面积流行病确定钢柱基础极限抗压强度和弯矩的研究

TRA VINH UNIVERSITY JOURNAL OF SCIENCE; ISSN: 2815-6072; E-ISSN: 2815-6099 Pub Date : 2022-03-28 DOI: 10.35382/tvujs.1.46.2022.863

Hao Phuoc Bui

{"title":"REASERCH ON DETERMINATION FOR THE LIMITED COMPRESSIVE STRENGTH AND BENDING MOMENT OF THE STEEL COLUMN BASE USING EFFECTIVE AREA PANDEMIC","authors":"Hao Phuoc Bui","doi":"10.35382/tvujs.1.46.2022.863","DOIUrl":"https://doi.org/10.35382/tvujs.1.46.2022.863","url":null,"abstract":"In the design of steel column base, parameters of limited compressive strength NRd and limited bending moment MRd are the control conditions that need to be paid due attention, otherwise it will damage the concrete foundation block at the foot of the column. The objective of the article is to use the effective area method in Eurocode 3 standard to determine NRd and MRd of the steel column base, then perform numericalcalculations to check the calculation results. The results show that the NRd and MRd of the steel column base tends to increase when increasing the thickness of the base plate and the grade of the concrete foundation block. Then, corresponding to each thickness of the base plate (from t=18 mm to t=36 mm) and each concrete grade (from C16/20 to C50/60) will give corresponding results for each NRd and MRd. However, it is important to note that the compressive capacity and bending moment of the column base will be limited, can not increase forever, for example, can not overcome the compressive strength Npl;Rd = 1596 kN and the limit bending strength Mpl;Rd=131.3 kN.m of the concrete foundation block at the base of the column. The article recommends using the results of this study to choose the thickness of the base plate and the grade of theconcrete foundation block in the most effective, accurate and economical way.","PeriodicalId":159074,"journal":{"name":"TRA VINH UNIVERSITY JOURNAL OF SCIENCE; ISSN: 2815-6072; E-ISSN: 2815-6099","volume":"2013 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128817664","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

APPLICATION OF PID METHOD TO CONTROL TRACTION ON THE VEHICLES THROUGH CONTROLLING THE BRAKE MOMENT AT THE TWO DRIVING WHEELS 应用pid方法通过控制两个驱动轮的制动力矩来控制车辆的牵引力

TRA VINH UNIVERSITY JOURNAL OF SCIENCE; ISSN: 2815-6072; E-ISSN: 2815-6099 Pub Date : 2022-03-28 DOI: 10.35382/tvujs.1.46.2022.864

Tai Tan Phan, Ha Thanh Ngo, Banh Thanh Huynh

引用次数: 0

THE ISSUE OF NATIONALISM IN NATIONAL LITERATURE EDUCATION IN VIETNAM BEFORE 1945 AND THE LESSONS FOR THE AGE OF GLOBALIZATION 1945年前越南民族文学教育中的民族主义问题及其对全球化时代的启示

TRA VINH UNIVERSITY JOURNAL OF SCIENCE; ISSN: 2815-6072; E-ISSN: 2815-6099 Pub Date : 2022-03-28 DOI: 10.35382/tvujs.1.46.2022.860

Trang Doan Thuy Nguyen

引用次数: 0

EVALUATION OF GENETIC DIVERSITY OF THE BLACK GLUTINOUS RICE BASED ON AGRO-MORPHOLOGICAL CHARACTERS 基于农业形态特征的黑糯米遗传多样性评价

TRA VINH UNIVERSITY JOURNAL OF SCIENCE; ISSN: 2815-6072; E-ISSN: 2815-6099 Pub Date : 2022-03-28 DOI: 10.35382/tvujs.1.46.2022.868

A. Trinh, Thanh T. Nguyen, H. Phan, L. Nguyen, Thuy Nguyen Thi, Kim Nhu Tran Thi, Vy Mai, Tuyet Mai Nguyen Thi, Thuc Truong Vo

{"title":"EVALUATION OF GENETIC DIVERSITY OF THE BLACK GLUTINOUS RICE BASED ON AGRO-MORPHOLOGICAL CHARACTERS","authors":"A. Trinh, Thanh T. Nguyen, H. Phan, L. Nguyen, Thuy Nguyen Thi, Kim Nhu Tran Thi, Vy Mai, Tuyet Mai Nguyen Thi, Thuc Truong Vo","doi":"10.35382/tvujs.1.46.2022.868","DOIUrl":"https://doi.org/10.35382/tvujs.1.46.2022.868","url":null,"abstract":"The study assessed the variations in nine agro-morphological characters among and within the black glutinous rice (Oryza sativa) population from Chau Thanh District, Tra Vinh Province. The nine quantitative agromorphological characters that were measured include culm length, leaf length, leaf width, number of panicles, panicle length, grain length, grain width, number of firm grain, and number of grain per panicle. The unweighted pair group method with arithmetic mean method and principal coordinate analysis by the NTSYS program were applied in this study to classify the nine agro-morphological characters. In addition, tocompare the variations in quantitative characters between O. sativa populations, one-way analysis of variance (ANOVA) was used. The results showed significant differences between the black glutinous rice populations for all quantitative agro-morphological characters. Moreover, some agro-morphological characters showed positive correlations to each other. The dendrogram generated from the analysis process of the agromorphological data divided the O. sativa populations into two groups with unfamiliar features. However, the O. sativa populations assessed exhibited a wide range of variations in morphological characteristics, both within the same population and among other populations with the same strains.","PeriodicalId":159074,"journal":{"name":"TRA VINH UNIVERSITY JOURNAL OF SCIENCE; ISSN: 2815-6072; E-ISSN: 2815-6099","volume":"1657 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129314478","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

CONDITIONS FOR DEVELOPMENT OF NIGHT TOURISM ACTIVITIES IN BAC LIEU CITY, BAC LIEU PROVINCE, VIETNAM 越南北寮省北寮市夜间旅游活动发展条件

TRA VINH UNIVERSITY JOURNAL OF SCIENCE; ISSN: 2815-6072; E-ISSN: 2815-6099 Pub Date : 2022-03-28 DOI: 10.35382/tvujs.1.46.2022.855

T. Pham

引用次数: 0

WATER QUALITY STATUS OF WHITE LEG SHRIMP FARMING AREAS IN BINH DAI DISTRICT, BEN TRE PROVINCE, VIETNAM 越南本特省平代区白腿虾养殖区水质状况

TRA VINH UNIVERSITY JOURNAL OF SCIENCE; ISSN: 2815-6072; E-ISSN: 2815-6099 Pub Date : 2022-03-28 DOI: 10.35382/tvujs.1.46.2022.866

Trang Cong Nguyen, D. N. Phan, Hạnh Nguyễn Thị, Kim Ngan Nguyen Ngoc, Yen Loan Dang Ngo

{"title":"WATER QUALITY STATUS OF WHITE LEG SHRIMP FARMING AREAS IN BINH DAI DISTRICT, BEN TRE PROVINCE, VIETNAM","authors":"Trang Cong Nguyen, D. N. Phan, Hạnh Nguyễn Thị, Kim Ngan Nguyen Ngoc, Yen Loan Dang Ngo","doi":"10.35382/tvujs.1.46.2022.866","DOIUrl":"https://doi.org/10.35382/tvujs.1.46.2022.866","url":null,"abstract":"This study focused on water quality assessment of farmed shrimp ponds in Binh Dai District, Ben Tre Province. The goals of the study were to provide chemical parameters of pond water for farmers, to identify problems and causes in farmed shrimp related to water quality and disease, and to help managers find appropriatesolutions to minimize damage to local shrimp farming. Water samples were collected monthly from January to June 2021 from 90 vannamei farmers in six different areas, including Vang Quoi Dong, Dinh Trung Binh Thoi, Phu Long, Phu Vang, and Binh Thang of Binh Dai District. Parameters investigated in this study included pH,alkalinity, NH4+, NH3, NO2- and three other minerals. Water quality parameters were analyzed based on APHA standard analysis methods. The results showed that the water quality of shrimp farming areas in Binh Dai fluctuated from time to time, and water quality parameters were suitable for vannamei shrimp farming. However, the concentration of NO2- was always higher than the permitted threshold. The results fromcluster analysis and MANOVA testing showed that water quality of the shrimp farming areas in Binh Dai was significantly different (p < 0.05), especially NO2-, Ca, Mg and alkalinity. These findings suggest that farmers must apply proper solutions for water quality management in each farming area to maximize crop production.","PeriodicalId":159074,"journal":{"name":"TRA VINH UNIVERSITY JOURNAL OF SCIENCE; ISSN: 2815-6072; E-ISSN: 2815-6099","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125741937","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

POTENTIAL BENEFITS OF ARBUSCULAR MYCORRHIZA FUNGI IN SUSTAINABLE AGRICULTURAL CULTIVATION 丛枝菌根真菌在可持续农业栽培中的潜在效益

TRA VINH UNIVERSITY JOURNAL OF SCIENCE; ISSN: 2815-6072; E-ISSN: 2815-6099 Pub Date : 2022-03-28 DOI: 10.35382/tvujs.1.46.2022.865

Lưu Thị Thúy Hải, Nga Huynh, L. Le

{"title":"POTENTIAL BENEFITS OF ARBUSCULAR MYCORRHIZA FUNGI IN SUSTAINABLE AGRICULTURAL CULTIVATION","authors":"Lưu Thị Thúy Hải, Nga Huynh, L. Le","doi":"10.35382/tvujs.1.46.2022.865","DOIUrl":"https://doi.org/10.35382/tvujs.1.46.2022.865","url":null,"abstract":"The Arbuscular Mycorrhiza fungi have a mutualistic relationship with 80% of terrestrial plants. Arbuscular Mycorrhiza fungi are considered as a biofertilizer source because of their positive effects on plant growth andproductivity They can help to reduce the amount of chemical fertilizers by up to 50% due to their ability in enhancing crops to uptake mineral nutrients efficently such as nitrogen, phosphorus, potassium, calcium, zinc. . . thereby increasing crop yield. Moreover, this endosymbiotic fungus also shows its potential as a biopesticide due to its ability to biologically antagonize a wide range of fungi, viruses, and nematodes, which cause diseases on plants. Besides, Arbuscular Mycorrhiza fungi also help plants to resist to abiotic streeses such as drought, salinity, and toxicity of heavy metals. The glomalin compound secreted by mycorrhizal fungi has the ability tobind tiny soil particles together to form a stable soil structure and aggregates, helping to improve soil qualitỵ Thus, Arbuscular Mycorrhiza fungi have a high use potential in sustainable agricultural development under the context of climate change such as drought, salinity intrusion.","PeriodicalId":159074,"journal":{"name":"TRA VINH UNIVERSITY JOURNAL OF SCIENCE; ISSN: 2815-6072; E-ISSN: 2815-6099","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127994500","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