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Determining the dimensions of mobile app usability in the context of Vietnam's tourism: A theoretical approach 确定越南旅游背景下移动应用程序可用性的维度:一种理论方法
Journal of Science and Technology Issue on Information and Communications Technology Pub Date : 2022-12-31 DOI: 10.31130/ud-jst.2022.489e
TrangKhanh Tran, Le Van Huy Le, Nguyen Huu Thai Thinh Nguyen
{"title":"Determining the dimensions of mobile app usability in the context of Vietnam's tourism: A theoretical approach","authors":"TrangKhanh Tran, Le Van Huy Le, Nguyen Huu Thai Thinh Nguyen","doi":"10.31130/ud-jst.2022.489e","DOIUrl":"https://doi.org/10.31130/ud-jst.2022.489e","url":null,"abstract":"Nowadays, along with the popularity of mobile devices, mobile apps gradually become an essential part of users. To improve competitiveness and recover from the Covid-19 pandemic, tourism businesses need to know how to take advantage of the power of mobile technology, especially mobile apps. Therefore, this study concentrates on identifying and explaining the dimensions that comprise mobile app usability in the tourism sector. For this purpose, the authors have used a qualitative method of an in-depth interviews technique. The results indicated that there are 7 dimensions of mobile tourism app usability, including App design; App utility; Interface graphic; Interface input; Interface output; Interface structure; and App dependability. The findings have provided tourism managers with useful knowledge to improve the usability of tourism apps to attract more users.","PeriodicalId":262140,"journal":{"name":"Journal of Science and Technology Issue on Information and Communications Technology","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122192186","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
Embodiment experience in some orientational metaphors in English and Vietnamese newspapers 英语和越南语报纸中一些方位隐喻的体现经验
Journal of Science and Technology Issue on Information and Communications Technology Pub Date : 2022-12-31 DOI: 10.31130/ud-jst.2022.065e
Huynh Ngoc Mai Kha Huynh, Nguyen Hoang Thuc Anh Nguyen
{"title":"Embodiment experience in some orientational metaphors in English and Vietnamese newspapers","authors":"Huynh Ngoc Mai Kha Huynh, Nguyen Hoang Thuc Anh Nguyen","doi":"10.31130/ud-jst.2022.065e","DOIUrl":"https://doi.org/10.31130/ud-jst.2022.065e","url":null,"abstract":"The article aims to investigate the impact of embodiment theory by Lakoff & Johnson on some orientational metaphorical structures identified through the examining of some official electronic newspapers in the UK and Vietnam. Based on the data collected via the use of Metaphor Identification Procedure by Kovecses, the article has made an illumination over the operation and determination of embodied experiential principles on human’s mind, which sets foundation for mankind’s conceptualization about the world through their interactive experience with their surrounding environment. Based on acquired explanations about embodiment experience, the article has proposed some initial conclusions about embodiment in metaphorical expressions which include both universality and peculiarity in language & culture of a nation.","PeriodicalId":262140,"journal":{"name":"Journal of Science and Technology Issue on Information and Communications Technology","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134501992","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
Effect of loaded-pad thickness on the static behaviors of five-pad hydrodynamic journal bearings 加载垫厚对五垫流体动压滑动轴承静态性能的影响
Journal of Science and Technology Issue on Information and Communications Technology Pub Date : 2022-12-31 DOI: 10.31130/ud-jst.2022.503e
Dang Phuoc Vinh Dang
{"title":"Effect of loaded-pad thickness on the static behaviors of five-pad hydrodynamic journal bearings","authors":"Dang Phuoc Vinh Dang","doi":"10.31130/ud-jst.2022.503e","DOIUrl":"https://doi.org/10.31130/ud-jst.2022.503e","url":null,"abstract":"The use of tilting pad journal bearings (TPJBs) has increased in the recent past due to their stabilizing effects on the rotor bearing system. Most of the studies about steady state and dynamic behaviors of TPJBs are usually evaluated by means of thermohydrodynamic models assuming nominal dimensions for the bearing. However, machining errors could lead to actual bearing geometry and dimensions different from the nominal ones. In particular, for TPJB the asymmetry of the bearing geometry leads to unexpected behavior of the bearing. In this paper, effects of non-uniform clearance on TPJBs’ performances such as clearance profile, shaft locus, power loss, pad tilt angle, and pressure distribution are evaluated using an analytical model. The results show that effects of non-uniform clearance on static characteristics of TPJBs are considerable when evaluating the efficiency of the bearing in particular and system in general.","PeriodicalId":262140,"journal":{"name":"Journal of Science and Technology Issue on Information and Communications Technology","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124578368","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 Method for Fast Synchronization of Chaotic Systems and Its Application to Chaos-based Secure Communication 一种混沌系统快速同步方法及其在基于混沌的保密通信中的应用
Journal of Science and Technology Issue on Information and Communications Technology Pub Date : 2022-12-31 DOI: 10.31130/ud-jst.2022.541ict
Tho Nguyen Van, Ngoc Do Thanh Bao, Ninh Mai Thi An, Rin Nguyen Vy, Dung Le Dinh
{"title":"A Method for Fast Synchronization of Chaotic Systems and Its Application to Chaos-based Secure Communication","authors":"Tho Nguyen Van, Ngoc Do Thanh Bao, Ninh Mai Thi An, Rin Nguyen Vy, Dung Le Dinh","doi":"10.31130/ud-jst.2022.541ict","DOIUrl":"https://doi.org/10.31130/ud-jst.2022.541ict","url":null,"abstract":"Chaos theory is one of the fields of research that has many practical applications. An important application of chaos in communication is that it can be used for secure communication. To be able to use the chaotic signal in communication, we need to synchronize the chaotic signal between the receiver and the transmitter. In this paper, a sliding mode controller is proposed for global synchronization between two chaotic systems. The interesting point of this controller is that it can help reduce the synchronization time based on the selection of the appropriate gain parameter. This method has also been applied to a secure communication system with chaos masking. Finally, numerical simulations are given to illustrate the effectiveness of the proposed method.","PeriodicalId":262140,"journal":{"name":"Journal of Science and Technology Issue on Information and Communications Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131238043","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
Labor and infrastructure factors affecting provincial distribution of foreign direct investment in Vietnam 劳动力和基础设施因素对越南外商直接投资省级分布的影响
Journal of Science and Technology Issue on Information and Communications Technology Pub Date : 2022-12-31 DOI: 10.31130/ud-jst.2022.547e
Huynh Huynh, Huynh Huynh
{"title":"Labor and infrastructure factors affecting provincial distribution of foreign direct investment in Vietnam","authors":"Huynh Huynh, Huynh Huynh","doi":"10.31130/ud-jst.2022.547e","DOIUrl":"https://doi.org/10.31130/ud-jst.2022.547e","url":null,"abstract":"The study assesses the influence of labor and infrastructure on attracting foreign direct investment (FDI) to the provinces of Vietnam in the period of 2009 - 2020. Research results from linear regression model and random effects estimation method have confirmed the importance of human capital and infrastructure in attracting FDI. The labor-related aspects in this study confirm that tendency of MNEs focusing on labor-intensive industries in Vietnam has not changed. The study also provides policy implications as building and improving the quality of infrastructure with the main goal of reducing inequality in attracting more FDI inflows to Vietnam's provinces in the near future. In addition, the workforce needs to have a plan to prepare themselves with solid knowledge and necessary skills to hone and absorb the know-how transferred from foreign investment companies, to have an ability to contribute to the development of the quality of our country's human resources.","PeriodicalId":262140,"journal":{"name":"Journal of Science and Technology Issue on Information and Communications Technology","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132054617","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
Proposing a distributed generation curtailment optimization model to minimize total power losses of distribution network 提出了一种以配电网总损耗最小为目标的分布式弃电优化模型
Journal of Science and Technology Issue on Information and Communications Technology Pub Date : 2022-12-31 DOI: 10.31130/ud-jst.2022.178e
Le Hong Lam Le, Phan Minh Nhat Phan, Phan Quang An Phan
{"title":"Proposing a distributed generation curtailment optimization model to minimize total power losses of distribution network","authors":"Le Hong Lam Le, Phan Minh Nhat Phan, Phan Quang An Phan","doi":"10.31130/ud-jst.2022.178e","DOIUrl":"https://doi.org/10.31130/ud-jst.2022.178e","url":null,"abstract":"In recent years, Distributed Generation has grown explosively, especially solar power, and the impact of the COVID-19 which has lowed the load, caused the unbalance between electricity supply and demand. In order to solve this problem, the Ministry of Industry and Trade has taken measures to direct Vietnam Electricity to manually reduce this energy source. At present, the member Electricity companies only curtail equally for all investors, this curtailment model is not optimal in terms of power losses. In this study, an optimization model is developed to help power companies obtain an optimal curtailment result in terms of minimizing the power losses on the distributed grid when needed. The proposed model is validated with the real data provided by Thue Thien Hue Power company and commercial software.","PeriodicalId":262140,"journal":{"name":"Journal of Science and Technology Issue on Information and Communications Technology","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132932793","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
Research on the use of agricultural waste to manufacture highly hygroscopic materials for agricultural applications 利用农业废弃物制造农业用高吸湿性材料的研究
Journal of Science and Technology Issue on Information and Communications Technology Pub Date : 2022-12-31 DOI: 10.31130/ud-jst.2022.443e
N. Nguyên, Huynh Huynh, Nguyen Dinh Lam Nguyen
{"title":"Research on the use of agricultural waste to manufacture highly hygroscopic materials for agricultural applications","authors":"N. Nguyên, Huynh Huynh, Nguyen Dinh Lam Nguyen","doi":"10.31130/ud-jst.2022.443e","DOIUrl":"https://doi.org/10.31130/ud-jst.2022.443e","url":null,"abstract":"Material based on hydrogel from rice-straw with high absorption capacity and slow water release was prepared by cryogenic method, using citric acid as cross-linker and without creating waste stream to the environment. The structure and properties of the material were characterized by SEM, XRD, FTIR and TGA method. The results showed that the largest water absorbency of the material reached 30.67g/g, 4.48 times higher than the original rice-straw. The material was able to slowly release water in 6 days at room temperature and return water absorption of 3.97 g/g when reusing the material. In addition, the material is biodegradable and biocompatible. With the obtained results and simple, inexpensive, environmentally friendly method, this is a material that can be industrially produced and widely used in green agriculture.","PeriodicalId":262140,"journal":{"name":"Journal of Science and Technology Issue on Information and Communications Technology","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131676125","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
Torque ripple and mass minimization of a 20-MW direct drive offshore wind generator 20兆瓦直接驱动海上风力发电机的转矩脉动和质量最小化
Journal of Science and Technology Issue on Information and Communications Technology Pub Date : 2022-12-31 DOI: 10.31130/ud-jst.2022.318e
Hoang Trung Kien Hoang, Nguyen Thi Khanh Huyen Nguyen
{"title":"Torque ripple and mass minimization of a 20-MW direct drive offshore wind generator","authors":"Hoang Trung Kien Hoang, Nguyen Thi Khanh Huyen Nguyen","doi":"10.31130/ud-jst.2022.318e","DOIUrl":"https://doi.org/10.31130/ud-jst.2022.318e","url":null,"abstract":"This article investigates the structural optimization of a 20-MW offshore wind generator to minimize the torque ripple and mass. The surface-mounted permanent magnet topology will be chosen for the generator. In addition, the double-layer armature winding configuration will be utilized. The direct-drive technology will be adopted to increase the reliability of the offshore wind energy conversion system. The multi-objective optimization of the generator is carried out based on the particle swarm algorithm. Results show that the torque ripple of the optimal model is significantly reduced to as much as 0.41% at full-load conditions making the configuration suitable for the high-power offshore wind generator.","PeriodicalId":262140,"journal":{"name":"Journal of Science and Technology Issue on Information and Communications Technology","volume":"1891 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130033350","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
Brain MRI Images Generating Method Based on Cyclegan 基于Cyclegan的脑MRI图像生成方法
Journal of Science and Technology Issue on Information and Communications Technology Pub Date : 2022-12-31 DOI: 10.31130/ud-jst.2022.310ict
Hinh Van Nguyen, T. Trong
{"title":"Brain MRI Images Generating Method Based on Cyclegan","authors":"Hinh Van Nguyen, T. Trong","doi":"10.31130/ud-jst.2022.310ict","DOIUrl":"https://doi.org/10.31130/ud-jst.2022.310ict","url":null,"abstract":"Generating tumor images on a brain MRI image at random locations can help medical researchers and medical students in predicting possible tumor possibilities. In this study, we propose to apply CycleGan to create MRI images with brain tumors from MRI images without brain tumors, thereby increasing the number of MRI images with brain tumors. With the initial data set of 660 images without brain tumors, the CycleGan model has created a new data set of 660 images with brain tumors, aiming to increase the number of brain MRI images for future studies. The received results will be evaluated and compared to others studied based on FID score.","PeriodicalId":262140,"journal":{"name":"Journal of Science and Technology Issue on Information and Communications Technology","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116657518","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
Anti-inflammatory activities of compounds isolated from Amanita caesarea collected in Lam Dong province 林同省产产金刚伞化合物的抗炎活性研究
Journal of Science and Technology Issue on Information and Communications Technology Pub Date : 2022-12-31 DOI: 10.31130/ud-jst.2022.295e
To Dao Cuong To, N. D. Nguyen, Phi Hung Nguyen Phi, Nguyen Huu Kien Nguyen, Ngu Truong Nhan Ngu, Nguyen Thi Nguyen, Manh Hung Tran Manh
{"title":"Anti-inflammatory activities of compounds isolated from Amanita caesarea collected in Lam Dong province","authors":"To Dao Cuong To, N. D. Nguyen, Phi Hung Nguyen Phi, Nguyen Huu Kien Nguyen, Ngu Truong Nhan Ngu, Nguyen Thi Nguyen, Manh Hung Tran Manh","doi":"10.31130/ud-jst.2022.295e","DOIUrl":"https://doi.org/10.31130/ud-jst.2022.295e","url":null,"abstract":"Five natural secondary metabolites as cinnamic acid (1), (+)-catechin (2), (-)-epicatechin (3), p-coumaric acid (4), and ferulic acid (5) were isolated from Amanita caesarea based on anti-inflammatory activity-guided extraction. Their structures (1-5) were determined by NMR spectra as well as by comparison with previously reported literature. Compounds 3 and 5 have been isolated from A. caesarea for the first time. The anti-inflammatory activity through inhibition of nitric oxide (NO) production of isolates (1-5) was evaluated. Among them, compounds 2 and 3 exhibited strong inhibitory activity with IC50 values of 4.8 and 5.7 μM, respectively. Compounds 4 and 5 with IC50 values of 18.4 and 9.6 μM, respectively showed moderate inhibitory activity. The results proposed that A. caesarea might exert anti-inflammatory effects due to its mainly NO-inhibitory constituents","PeriodicalId":262140,"journal":{"name":"Journal of Science and Technology Issue on Information and Communications Technology","volume":"159 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123167224","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
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