CTU Journal of Innovation and Sustainable Development最新文献_第2页

Shoreline evolution in adjacent to a coastal structure in Hiep Thanh commune, Duyen Hai district, Tra Vinh province 茶荣省 Duyen Hai 县 Hiep Thanh 乡海岸结构附近的海岸线演变情况

CTU Journal of Innovation and Sustainable Development Pub Date : 2024-05-04 DOI: 10.22144/ctujoisd.2024.275

Van Duy Dinh, Thanh Tran, Dat Pham, Do Nhut An Lieu, Van Ty Tran

{"title":"Shoreline evolution in adjacent to a coastal structure in Hiep Thanh commune, Duyen Hai district, Tra Vinh province","authors":"Van Duy Dinh, Thanh Tran, Dat Pham, Do Nhut An Lieu, Van Ty Tran","doi":"10.22144/ctujoisd.2024.275","DOIUrl":"https://doi.org/10.22144/ctujoisd.2024.275","url":null,"abstract":"Coastal erosion is significant along the coastline in Hiep Thanh commune, Duyen Hai district, Tra Vinh province, Viet Nam. In order to address this severe coastal erosion, the local community has constructed a concrete embankment as an emergency solution to protect the coastline. However, this solution exacerbates the issue since the fundamental processes of coastal erosion remain inadequately explored and understood. Specifically, in beach sections without the concrete embankment, erosion still occurs. Therefore, this paper aims to investigate the shoreline changes adjacent to the embankment using an integrated approach with remote sensing and diffusion theory. The results show that beach erosion is occurring near the embankment at a rate of 44 meters per year, and the diffusion coefficient for longshore sand transport in the study area is 130 square meters per day. This study offers a practical approach to examining changes in the shoreline adjacent to a coastal structure, particularly valuable in situations where there is a scarcity of measured field data.","PeriodicalId":310835,"journal":{"name":"CTU Journal of Innovation and Sustainable Development","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141013592","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

Assessing reinforced pavement performance: Influence of geogrid position, axial stiffness, and applied stress 评估加固路面的性能：土工格栅位置、轴向刚度和外加应力的影响

CTU Journal of Innovation and Sustainable Development Pub Date : 2024-05-04 DOI: 10.22144/ctujoisd.2024.278

Tan-Hung Nguyen, Kyra Kamille A. Toledo, Trong‐Phuoc Huynh

{"title":"Assessing reinforced pavement performance: Influence of geogrid position, axial stiffness, and applied stress","authors":"Tan-Hung Nguyen, Kyra Kamille A. Toledo, Trong‐Phuoc Huynh","doi":"10.22144/ctujoisd.2024.278","DOIUrl":"https://doi.org/10.22144/ctujoisd.2024.278","url":null,"abstract":"This study examined the performance of pavement, considering geogrid’s position within the pavement layers, geogrid’s axial stiffness, and applied stress through the Plaxis 2D program. Results showed that the position of the geogrid has a significant effect on the pavement performance. Using geogrid at the top of the base layer produced a deformation of 2.357 mm, and one at the top of the subbase had a deformation of 2.433 mm. Thus, the use of geogrid on the top of the base layer could provide the highest effectiveness on the pavement performance. Additionally, the geogrid’s axial stiffness had a slight impact on the performance of reinforced pavement. When the axial stiffness increased 2.5 times, the deformation of the pavement decreased only about 0.061 mm. The response of the stress-strain of the reinforced pavement was found to be nonlinear for the static applied stress and to be linear for the dynamic applied stress. The results obtained in this study were theoretically extracted using finite element analysis and the discussions were based on those. Therefore, further studies for the pavement reinforced with geogrid by experiments in the laboratory and on-site should be carried out to understand the impact of geogrid on pavement performance.","PeriodicalId":310835,"journal":{"name":"CTU Journal of Innovation and Sustainable Development","volume":"2 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141014728","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

Beyond the pandemic: The changing landscape of technology integration in higher education in Central Visayas, Philippines 超越大流行病：菲律宾中米沙鄢地区高等教育技术整合的变化情况

CTU Journal of Innovation and Sustainable Development Pub Date : 2024-03-22 DOI: 10.22144/ctujoisd.2024.262

Charess E. Goles, Joje Mar Sanchez, Gino G Sumalinog, Janet A. Mananay, Isidro Max V. Alejandro

{"title":"Beyond the pandemic: The changing landscape of technology integration in higher education in Central Visayas, Philippines","authors":"Charess E. Goles, Joje Mar Sanchez, Gino G Sumalinog, Janet A. Mananay, Isidro Max V. Alejandro","doi":"10.22144/ctujoisd.2024.262","DOIUrl":"https://doi.org/10.22144/ctujoisd.2024.262","url":null,"abstract":"The pandemic has revealed the differences in how educators use technology to better serve students. This study explored teachers' lived experiences regarding technology use in their teaching functions before the pandemic altered the country's educational system and after the pandemic subsided. It employed descriptive phenomenology as a research design, involving eight college teachers from public and private higher education institutions in Central Visayas, Philippines. A semi-structured interview guide was used, and data were analyzed using the thematic analysis steps. After intensive interpretation and analysis of the data, six themes emerged: 1) pre-pandemic teaching and technology use; 2) changes in teaching and technology use during the pandemic; 3) post-pandemic teaching and technology use; 4) challenges in post-COVID teaching and technology use; 5) opportunities in post-COVID teaching and technology use; and 6) perceptions about the future of teaching and technology use. The results showed that technology has substantially enhanced teaching efficacy and improved technology skills. It is recommended that teachers equip themselves with technological knowledge to meet future demands. For future studies, researchers may focus on exploring how technology affects the health of both teachers and students.","PeriodicalId":310835,"journal":{"name":"CTU Journal of Innovation and Sustainable Development","volume":" 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140217564","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

Phytotoxicity activities and chemical composition of the seed essential oil of Monodora myristica 肉豆蔻种子精油的植物毒性活性和化学成分

CTU Journal of Innovation and Sustainable Development Pub Date : 2023-11-22 DOI: 10.22144/ctujoisd.2023.050

Awojide H. Shola, Ajayi T. Mercy, Oyewole A. Kehinde, Adeyemo G. Abayomi, F.E. Olumide, A. E. Adeleke, Abdullahi M. Tolani

{"title":"Phytotoxicity activities and chemical composition of the seed essential oil of Monodora myristica","authors":"Awojide H. Shola, Ajayi T. Mercy, Oyewole A. Kehinde, Adeyemo G. Abayomi, F.E. Olumide, A. E. Adeleke, Abdullahi M. Tolani","doi":"10.22144/ctujoisd.2023.050","DOIUrl":"https://doi.org/10.22144/ctujoisd.2023.050","url":null,"abstract":"The phytotoxic effect of essential oil from African nutmeg (Monodora myristica) seeds on growth of tomato (Solanum lycopersicum L)., maize (Zea mays), and cowpea (Vigna unguiculata) was examined. Essential oil from the seeds of M. myristica was extracted by hydrodistillation. The essential oil’s composition was examined by gas chromatography-mass spectrometry (GC-MS). The phytotoxicity of the essential oil formulation at different concentrations for five days was evaluated on the leaves and roots. The activity was ascertained by estimating the shoots’ and the roots’ lenght. The result of GC-MS showed α–phellandrene (43.2%) as the essential oil's main constituent. The essential oil reduced the growth of the root and shoot of tomato, maize, and cowpea. At 4 mL/L treatment, the percentage inhibition of roots ranged from 63.8 to 75.4% after five days, while that of the shoot was 100% after three days. A varying toxicity was reported on the leaves of the seedlings of the plants after 24 hours. Phytotoxic was more potent on the leaves of cowpea and lowest in tomato. Phototoxic activity was also noted when essential oil was administered to the Seedling’s roots. The three species showed notable phytotoxicity when exposed to the essential oil of M. myristica.","PeriodicalId":310835,"journal":{"name":"CTU Journal of Innovation and Sustainable Development","volume":"182 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139246438","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

Preparation and characterization of magnetic-lignin nanoparticles with potential applications for drug delivery 具有药物输送应用潜力的磁性木质素纳米粒子的制备与表征

CTU Journal of Innovation and Sustainable Development Pub Date : 2023-11-22 DOI: 10.22144/ctujoisd.2023.051

Luu Ngoc Hanh Cao, H. Luong, H. Dang, Quoc Phong Ho, Thi Nhu Y Vo, Thi Viet Anh Dang

{"title":"Preparation and characterization of magnetic-lignin nanoparticles with potential applications for drug delivery","authors":"Luu Ngoc Hanh Cao, H. Luong, H. Dang, Quoc Phong Ho, Thi Nhu Y Vo, Thi Viet Anh Dang","doi":"10.22144/ctujoisd.2023.051","DOIUrl":"https://doi.org/10.22144/ctujoisd.2023.051","url":null,"abstract":"This study successfully combined Fe3O4 nanoparticles (made by co-precipitation technique) and lignin (extracted from sugarcane bagasse) as magnetic-lignin nanoparticles. The factors affecting the synthesis such as ratio of Fe3O4/lignin and reaction time were investigated. Fe3O4@lignin nanoparticles were obtained at optimal conditions, including the ratio between Fe3O4 and lignin of 1:0.5 and the reaction time of 9 hours. The resulting nanoparticles were spherical and had a fairly uniform particle size distribution, with an average diameter of 53.42 ± 5.12 nm (obtained from SEM images). The thermal stability of Fe3O4/lignin nanoparticles is quite stable and lignin content in hybrid Fe3O4/lignin particles is estimated to account for about 32.82%. FTIR results show a successful combination of Fe3O4 and lignin. The magnetic saturation of Fe3O4/lignin nanoparticles was determined by a vibrating sample magnetometer (VSM) with values of 50.8 emu.g-1, showed that the material keeps its super-paramagnetic properties, which is critical for their application in drug delivery field.","PeriodicalId":310835,"journal":{"name":"CTU Journal of Innovation and Sustainable Development","volume":"12 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139248306","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 legal perspective on child support obligation after divorce: The Vietnamese case 从法律角度看离婚后的子女抚养义务：越南案例

CTU Journal of Innovation and Sustainable Development Pub Date : 2023-11-22 DOI: 10.22144/ctujoisd.2023.056

Linh Thi My Nguyen, Giang Thi Truc Huynh, Qui Khac Tran

引用次数: 0

Using lesson study for teacher development: A case study of Vietnamese EFL teachers’ reflections 利用课程研究促进教师发展：越南英语教师反思案例研究

CTU Journal of Innovation and Sustainable Development Pub Date : 2023-11-22 DOI: 10.22144/ctujoisd.2023.052

Van Thong Nguyen, Trung Cang Nguyen, Bich Nhu Ho

引用次数: 0

Review of the effects of Task-based Language Teaching on EFL learners’ speaking performance: What remains to be researched? 回顾任务型语言教学对 EFL 学习者口语表现的影响：还有哪些有待研究？

CTU Journal of Innovation and Sustainable Development Pub Date : 2023-11-22 DOI: 10.22144/ctujoisd.2023.048

Truong Sang Huynh, Van Loi Nguyen

引用次数: 0

Prevalence and antibiotic resistance of Staphylococcus aureus isolated from Pangasius fish and fish processing handlers in the Mekong Delta, Viet Nam 从越南湄公河三角洲的鱼芒鱼和鱼类加工处理人员体内分离出的金黄色葡萄球菌的流行率和抗生素耐药性

CTU Journal of Innovation and Sustainable Development Pub Date : 2023-11-22 DOI: 10.22144/ctujoisd.2023.055

Nguyen Trang Phan, Miyamoto Takahisa, Thi Anh Ngoc Tong

引用次数: 0

Synergistic and antagonistic medicinal activities of essential oil of Monodora myristica 肉豆蔻精油的协同和拮抗药用活性

CTU Journal of Innovation and Sustainable Development Pub Date : 2023-11-22 DOI: 10.22144/ctujoisd.2023.046

S. Awojide, Boluwatife Akinlade, K. Oyewole, Abayomi G. Adeyemo, Emmanuel O. Adeniyi, Olumide E. Fadunmade, A. J. Anifowose

{"title":"Synergistic and antagonistic medicinal activities of essential oil of Monodora myristica","authors":"S. Awojide, Boluwatife Akinlade, K. Oyewole, Abayomi G. Adeyemo, Emmanuel O. Adeniyi, Olumide E. Fadunmade, A. J. Anifowose","doi":"10.22144/ctujoisd.2023.046","DOIUrl":"https://doi.org/10.22144/ctujoisd.2023.046","url":null,"abstract":"Synergetic and antagonistic medicinal activities of crude and fractionated essential oil from the seed of Monodora myristica were investigated. The crude essential oil was extracted by steam distillation and then subjected to column chromatography; three fractions (N1, N2, and N3) were obtained. To identify the components, gas chromatography and mass spectrometry (GC-MS) investigation was utilized. The phytochemical parameters were determined by standard analytical methods. 2,2'-azino-bis (3-ethylbenzothiazoline-6-sulphonic acid) (ABTS) and 2,2-diphenyl-1-picrylhydrazyl (DPPH) were used to evaluate the antioxidative capacity. and, the anti-diabetic activity was performed using α-amylase and α-glucosidase assay. The Agar diffusion method was used to determine the antibacterial activities. The GC-MS analysis indicated p-cymene (21.12%) as the major component of the crude essential oil. The antioxidant activity using DPPH varied from 614 to 704 µg/mL, while the ABTS activity ranged between 281-342 µg/mL. The α-amylase assay showed fraction N1 with IC50 value of 3.21 µg/mL, while for α-glucosidase assay, fraction N2 with IC50 2.15 µg/mL recorded the least value. The minimum inhibitory concentration values for the crude extract and all the fractions against the strains of bacteria ranged from 6 to 12.5 mg/mL Both crude extract and fractionated essential oil showed antioxidant, anti-diabetic and antibacterial activities.","PeriodicalId":310835,"journal":{"name":"CTU Journal of Innovation and Sustainable Development","volume":"25 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139249562","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