Tạp chí Khoa học và Công nghệ Việt Nam最新文献_第2页

Influence of marketing communication on smartphone buying decision 营销传播对智能手机购买决策的影响

Tạp chí Khoa học và Công nghệ Việt Nam Pub Date : 2023-10-25 DOI: 10.31276/vjst.65(10).44-48

Thu Hoai Ao, Nhan Phuc Tran, Hai Tri Truong, Le Hoan Nhu Y Nguyen, Ngoc Tuong Vi Tran, Truong Nguyen

{"title":"Influence of marketing communication on smartphone buying decision","authors":"Thu Hoai Ao, Nhan Phuc Tran, Hai Tri Truong, Le Hoan Nhu Y Nguyen, Ngoc Tuong Vi Tran, Truong Nguyen","doi":"10.31276/vjst.65(10).44-48","DOIUrl":"https://doi.org/10.31276/vjst.65(10).44-48","url":null,"abstract":"Today, along with the increase in the number of smartphone users, marketing communications need to be personalised based on consumer interaction, with useful information while also providing a customer experience with high service quality to turn potential consumers into buyers. The mobile phone market in Vietnam is still growing market and is increasingly differentiated. The objective of the study is to explore the effects of marketing communication on the smartphone purchase decision of customers. The authors used qualitative and quantitative methods, applied to 255 consumer surveys using smartphones in Vietnam. The results show that there are 3 main groups of factors that affect the consumers' decision to buy smartphones, including communication by advertising through websites, communication through promotions, and communication by advertising through search engines. From the results obtained, the research team proposes some administrative implications for relevant organizations and businesses about the effects of marketing communications on the purchasing behaviour of the customer, thereby increasing consumers' smartphone purchase decisions.","PeriodicalId":494861,"journal":{"name":"Tạp chí Khoa học và Công nghệ Việt Nam","volume":"11 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135113235","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

Adaptive agricultural transitions to droughts and salinity intrusion in the Mekong delta: Policy issues 湄公河三角洲对干旱和盐碱入侵的适应性农业转型:政策问题

Tạp chí Khoa học và Công nghệ Việt Nam Pub Date : 2023-10-25 DOI: 10.31276/vjst.65(10).68-72

Kieu Nhan Dang, Chi Thinh Ho, Hieu Trung Nguyen

引用次数: 0

Optimisation of the process of acquiring tannin compounds with anti - Vibrio parahaemolyticusfrom the leaves of sea almond tree (Terminalia catappa L.) 从海扁桃叶中提取抗副溶血性弧菌单宁化合物的工艺优化

Tạp chí Khoa học và Công nghệ Việt Nam Pub Date : 2023-10-25 DOI: 10.31276/vjst.65(10db).35-41

Thi Huyen Le, Minh Ngoc Truong, Viet The Ho, Ba Tho Nguyen, Thi Lien Nguyen

{"title":"Optimisation of the process of acquiring tannin compounds with anti - Vibrio parahaemolyticusfrom the leaves of sea almond tree (Terminalia catappa L.)","authors":"Thi Huyen Le, Minh Ngoc Truong, Viet The Ho, Ba Tho Nguyen, Thi Lien Nguyen","doi":"10.31276/vjst.65(10db).35-41","DOIUrl":"https://doi.org/10.31276/vjst.65(10db).35-41","url":null,"abstract":"Terminalia catappa L. (so-called Bang in Vietnamese) is considered an important medicinal plant in folk medicine for the treatment of digestive disorders and other inflammatory conditions. This plant contains several medicinally essential components, especially the tannin group. This study evaluated a number of factors affecting tannin extraction from the leaves of sea almond tree with the help of response surface methodology (RSM). The factors used to evaluate are solvent concentration, solvent:material ratio (v/w) and soaking time (hours). Research results show that the highest total tannin content (TTC) is 1.54 mg GAE/g raw material, the optimal conditions are determined as follows: ethanol 54%, solvent:material ratio (S:MR) is 41:1 (v/w) and soaking time 2 hours. The experimental values (TTC=1.54±0.02 mg TAE/g raw material) show good agreement with the predicted value (TTC=1.54 mg TAE/g raw material). Experiments evaluating antibacterial activity show that the optimal extract of sea almond tree leaves has the ability to resist Vibrio parahaemolyticus bacteria. The results of this study could pave the way for the mass production of medicinal compounds containing tannins from sea almond tree leaves and improve the usage value of this popular plant.","PeriodicalId":494861,"journal":{"name":"Tạp chí Khoa học và Công nghệ Việt Nam","volume":"19 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135168125","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

Evaluation of the disintegrability of eco-friendly packaging under laboratory and pilot-scale composting conditions 实验室和中试堆肥条件下环保包装的可降解性评价

Tạp chí Khoa học và Công nghệ Việt Nam Pub Date : 2023-10-25 DOI: 10.31276/vjst.65(10db).67-72

Thi Nguyet Anh Tuong, Thi Thuy Le, Hoang Linh Doan, Tien Dat Nguyen, Ngoc Diep Nguyen, Xuan Quang Chu, Hung Thuan Tran, hao Yen Linh Dang

引用次数: 0

Investigating the effects of the laser quenching technology on the hardness and microstructure of P18 steel 研究了激光淬火工艺对P18钢硬度和显微组织的影响

Tạp chí Khoa học và Công nghệ Việt Nam Pub Date : 2023-10-25 DOI: 10.31276/vjst.65(10db).58-61

Van Thanh Nguyen, Thanh Hop Nguyen, Duy Dan Nguyen

{"title":"Investigating the effects of the laser quenching technology on the hardness and microstructure of P18 steel","authors":"Van Thanh Nguyen, Thanh Hop Nguyen, Duy Dan Nguyen","doi":"10.31276/vjst.65(10db).58-61","DOIUrl":"https://doi.org/10.31276/vjst.65(10db).58-61","url":null,"abstract":"The article introduces laser quenching technology and presents the results of surveying the hardness and microstructure of P18 steel sample after laser quenching. Laser quenching is a new candidate technique for having precise heat treatment, limiting warping, saving energy, and being environmentally friendly compared to traditional quenching. Before quenching samples (laser quenching or normal quenching), the φ22 mm diameter x 20 mm thickness samples were sequentially ground by abrasive papers with a grit size of #240, 400, 600, 1000, and 1200. This study aimed to investigate the influence of laser quenching power and traditional quenching on the hardness and microstructure of P18 steel... The microstructure and microhardness were observed by the Axiovert 40 MAT optical microscope and the Future Tech Corp FM-700e hardness tester, respectively. The results showed that the quenched sample hardness with a laser source power of 300, 500, 700, and 900 W are 280, 450, 940, and 1050 HV0.1, respectively, and compared to the traditional harden, it only reaches 650 HV0.1. Observation of the microstructure of the laser-hardened sample in cross-section, including a bright white high-hardness region and a dark transition region.","PeriodicalId":494861,"journal":{"name":"Tạp chí Khoa học và Công nghệ Việt Nam","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135169199","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 proposing solutions to reduce noise for the operation of air compressors in wastewater treatment system 污水处理系统中空气压缩机运行噪声降低方案的研究

Tạp chí Khoa học và Công nghệ Việt Nam Pub Date : 2023-10-25 DOI: 10.31276/vjst.65(10db).73-76

Khac Uan Do, Manh Cuong Nguyen, Van Tuyen Nguyen, Hung Thuan Tran, Xuan Quang Chu

{"title":"Research on proposing solutions to reduce noise for the operation of air compressors in wastewater treatment system","authors":"Khac Uan Do, Manh Cuong Nguyen, Van Tuyen Nguyen, Hung Thuan Tran, Xuan Quang Chu","doi":"10.31276/vjst.65(10db).73-76","DOIUrl":"https://doi.org/10.31276/vjst.65(10db).73-76","url":null,"abstract":"Currently, aerobic biological methods are widely used for wastewater treatment. During the wastewater treatment process, air is forced by an air compressor into the biological treatment tank with high capacity, so, noise pollution often occurs during the system operation. This is affecting the health environment for workers, staff, and the surrounding population. Therefore, it is necessary to investigate and design a cover to reduce noise for the air compressor but not affect the operating efficiency of the device. The results in this study showed that after 30 minutes of continuous operation, the temperature around the air compressor increased by 2.5oC (from 29.5 to 32.0oC). The noise reduction is 4.0 dBA in case a polyurethane foam layer of 5 cm is used, and the noise reduction is 14.0 dBA if it is replaced with a mineral wool layer of 5 cm. The noise reduction is 17.0 dBA when combining the outer with a 5 cm polyurethane foam layer and the inner with a 5 cm mineral wool layer. Further, the noise reduction is reduced up to 24.0 dBA in case two layers of mineral wool (5 cm thick each) are used to form a homogeneous mass. Thus, using porous materials combined with mineral wool allows to reduce the noise level in accordance with the requirements of the QCVN 26:2010/BTNMT regulation (70 dBA).","PeriodicalId":494861,"journal":{"name":"Tạp chí Khoa học và Công nghệ Việt Nam","volume":"26 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135169317","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 methods of improving safety for collaborative robot 提高协作机器人安全性的方法研究

Tạp chí Khoa học và Công nghệ Việt Nam Pub Date : 2023-10-25 DOI: 10.31276/vjst.65(10db).30-34

Van Thuong Nguyen, Xuan Thinh Tran, Manh Khoi Giang

引用次数: 0

Research and integrate laser marking system on plastic materials using 355 nm UV laser 研究并集成了355nm紫外激光在塑料材料上的激光打标系统

Tạp chí Khoa học và Công nghệ Việt Nam Pub Date : 2023-10-25 DOI: 10.31276/vjst.65(10db).62-66

Thi Van Anh Tran, Xuan Tien Do, Hong Kien Cung, Van Giang Dinh, Duc Toan Truong, Xuan Thinh Tran

引用次数: 0

Research and experiment the wireless passive surface acoustic wave technology for conductor temperature monitoring of high voltage equipment 研究和实验了用于高压设备导体温度监测的无线无源表面声波技术

Tạp chí Khoa học và Công nghệ Việt Nam Pub Date : 2023-10-25 DOI: 10.31276/vjst.65(10db).19-23

Quoc Tuan Le, Van Dua Nguyen, Quoc Hung Nguyen, Hoang Long Nguyen, Thi Thu Ha Nguyen, Thi Hue Nguyen

引用次数: 0

Optimisation of the drying temperature of star anise by low-temperature drying technique combined with microwave 微波低温干燥技术对八角茴香干燥温度的优化

Tạp chí Khoa học và Công nghệ Việt Nam Pub Date : 2023-10-25 DOI: 10.31276/vjst.65(10db).77-80

Ha Tran, Thi Bich Thao Ma, Phuong Nguyen, Thi Hong Nguyen, Van Lieu Vu

{"title":"Optimisation of the drying temperature of star anise by low-temperature drying technique combined with microwave","authors":"Ha Tran, Thi Bich Thao Ma, Phuong Nguyen, Thi Hong Nguyen, Van Lieu Vu","doi":"10.31276/vjst.65(10db).77-80","DOIUrl":"https://doi.org/10.31276/vjst.65(10db).77-80","url":null,"abstract":"The purpose of this study is to optimise the drying temperature of star anise fruit using the low-temperature drying technique combined with microwaves on a heat pump combined with microwave drying system so that the drying time is shortest and the essential oil is highest. The raw materials used for the research are fresh anise harvested in Van Quan district, Lang Son province in August 2021. Experimentally, the effects of drying temperatures at the levels: 30, 35, 40, 45, 50 and 55oC have been determined on drying time and essential oil content in dried anise fruit (moisture content of anise fruit after drying ≤10%). Research results have determined that the optimal temperature for drying anise fruits using the low-temperature drying technique combined with microwaves is 48.7±1oC, drying time is 530±5 minutes, and the essential oil content in dried star anise fruits reaches 9.9 ml/100 g. These experimental research results have provided a scientific basis for the essential oil content of Lang Son star anise fruit, and technical parameters for drying star anise fruit using low-temperature drying techniques combined with microwaves, helping the production and processing of anise on an industrial scale, increasing the value of goods and serving export purposes.","PeriodicalId":494861,"journal":{"name":"Tạp chí Khoa học và Công nghệ Việt Nam","volume":"26 8","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135169194","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