bluuebunny/crossref_metadata_2025 huggingface dataset:
A STUDY OF GROUND EFFECT USING ROTOR-FUSELAGEVORTEX MODEL
Authors:   Le Quy Don Technical University, Pham Thanh Dong
Published: September 2022

Từ mô hình xoáy cánh quay - thân trực thăng được xây dựng bằng phương pháp xoáy rời rạc phi tuyến không dừng, tác giả xây dựng công cụ tính toán đặc trưng khí động cánh quay trực thăng trong điều kiện có hiệu ứng mặt đất. Mô hình tính toán của bài báo xét trong trường hợp trực thăng hạ cánh xuống các bề mặt không bằng phẳng và có diện tích khác nhau. Hình dạng và kích thước các bề mặt được mô phỏng bằng các phần tử xoáy dạng khung tứ giác. Các phần tử xoáy mô phỏng các bề mặt tương tác với các khung xoáy tứ giác trên cánh quay và trên thân trực thăng, tạo ra hiệu quả mô phỏng tương tác khí động và xét đến ảnh hưởng của hiệu ứng mặt đất đối với đặc trưng khí động của trực thăng. Các kết quả tính toán nhận được phản ánh đúng các hiện tượng thực tế, là cơ sở khoa học để đưa ra các khuyến cáo trong quá trình vận hành khai thác trực thăng.
INFLUENCE OF THE GAS VENT POSITION ON THE INITIAL MOVEMENT OF THE BOLT-CARRIER FOR THE AMPHIBIOUS RIFLES WHEN SHOOTING UNDER WATER
Authors:   Le Quy Don Technical University, Nguyen Van Hung
Published: September 2022

This paper presents a mathematical model to study the effect of the gas vent position on the movement of the bolt-carrier for the amphibious rifles when shooting under water. This mathematical model was applied for the 5.56mm amphibious rifle for different gas vent positions. The result of this research indicates that under the impact of the initial water in the barrel bore and the gas cylinder, the bolt-carrier only moves when the distance between the position of the gas vent and the muzzle is not smaller 171mm.
The Relationship of Parenting Feeding Paterns to The Occurrence of Undernutrition in Children Under Five
Authors: Nurhamidah Octarya  , Kurnia Dewiani  , Linda Yusanti  , Suriyati  , Novianti  , Linda Yulyani
Published: September 2022

Malnutrition can cause growth and development disorders and decreased concentration power. Poor food parenting is one of the factors causing malnutrition. This study aims to determine the relationship between eating parenting and malnutrition in children under five in Bengkulu City. This research design uses a cross-sectional approach. Further, the sample amounted to 53 respondents. The data sampling used a purposive sampling technique. Based on the results of univariate analysis of 53 respondents, there were 40 people (75.5%) who were <35 years old, 23 people (43.4%) who had a high school education, 30 people (56.6%) whose family income was 1.5 million, 37 people (69.8%) who do not work, 34 people (64.2%) who have a history of illness last six months, 49 people (92.5%) have a history of exclusive breastfeeding, 48 people (90.6%) who have a history of complete immunization, the majority of 35 people who have a poor diet (66.0%), the majority who have a Z-Score value is significantly less 34 people (64.2%). The results of the bivariate analysis test, which were reviewed statistically using Chi-Square analysis, showed a p-value = 0.741 > 0.05. It can be concluded that there is no significant relationship between parenting feeding patterns and the incidence of malnutrition in children under five with an OR value of 1.220, which means that mothers who have poor food parenting will be at risk of 1,220 times having toddlers with poor nutritional status.
Renovation of primary school principal training activities based on the competency framework
Authors:   Department of Education and Training Thuan Nam district, Ninh Thuan province, Van Quang NGUYEN
Published: September 2022

Renovating primary school principal training activities based on the competency framework is an urgent requirement in the current context of educational reform. By defining the concept of competency and primary school principal competency framework, the article presents the concept of primary school principal training and proposes measures to renovate training activities of primary school principals upon the competency framework, which aims to improve the effectiveness of primary school management in the current period.
Proposition of some solutions to improve the motivation in English learning for the students of Garment Technology and Fashion Design
Authors:   Faculty of Foreign Languages, Hanoi University of Industry, Ha Noi, Vietnam, Viet Nga NGUYEN
Published: September 2022

Improving students’ motivation for English language learning has long been attracted much attention from educators in the world. This study was conducted to investigate students’ levels of motivation in English leaning by students of garment technology and fashion design, and then find out the influential factors as well as suggest some solutions to solve the problems. The study implemented the investigation through interviews and questionnaires. It involved 85 students who majored in Garment Technology and Fashion Design at Ha Noi University of Industry. The findings showed that the lecturer was considered as the most influential factor in enhancing student’s motivation. Moreover, their teaching methods were placed at the highest position in the motivation building scale. Lecturers’ enthusiasm was also taken as the most effective solution to improve student’s motivation to learn English.
Enhancing awareness of training quality and training quality assurance based on AUN-QA standards for managers and lecturers at private universities in Ho Chi Minh City
Authors:   Van Lang University, Ho Chi Minh City, Van Tuan VO
Published: September 2022

Private Universities currently play an important role in the higher education system, contributing to the training of highly qualified human resources for the country. However, the training quality at private universities has been evaluated lower than that at the public ones. One of the main reasons is that the quality assurance at private universities has not been taken care of. Especially, the awareness of managers and teaching staffs on training quality assurance relatively affects their ability to ensure the training quality. This study is conducted to raise awareness of the quality of training and ensure the training quality according to AUN-QA standards for managers and lecturers at private universities in Ho Chi Minh City. The author has proposed solutions to be implemented and methods to implement them to raise awareness of training quality and ensure training quality according to AUN-QA standards.
Competency-based evaluation of department deans at teacher training colleges/departments
Authors:   Ho Chi Minh City Party Committee Inspection Committee, Thanh Trung LA
Published: September 2022

In this paper, we focus on defining: 1) the role and significance of the competency-based evaluation of department deans at teacher training colleges/departments; 2) the reality of the competency-based evaluation of department deans at teacher training colleges/departments; 3) the methods of conducting the competency-based evaluation of department deans at teacher training colleges/departments.
Experiential activities and application of David A. Kolb model in teaching physics toward developing capacity for students at high schools
Authors:   Vinh University, Nghe An, Viet Nam, Thi Nhi NGUYEN , Ngoc Nhan BUI ,   Department of Education and Training of Quang Binh province, Vietnam
Published: September 2022

This article explores the experiential activities includes definition, content, characteristics, forms, and organizing rules of teaching experiential activities towards developing student’s capacity. Based on defining the role of experiential activities for student competency formation and by exploring the experience model of David A. Kolb, we propose directions, ways of organizing experiential activities in teaching kinetics and dynamics in the 10th grade physics programme at high schools.
Evaluate the longitudinal force - bearing capacity of small section piles on soft ground by static load test
Authors:   Department of Construction of Vinh Long, Vinh Long City, Vinh Long, Vietnam, Huu Nghia PHAN , Viet Hung TRAN ,   Faculty of Civil Engineering, Hanoi University of Transport, Hanoi, Vietnam
Published: September 2022

Currently, the small-section concrete piles foundation is applied relatively much for low-rise residential buildings in weak geological areas. This study assessed the longitudinal force - bearing capacity of small-section concrete piles on soft ground by static load test. The aim of the research is to evaluate the bearing capacity of single concrete pile. Piles were tested according to the procedure specified in TCVN9393: 2012. The results show that the bearing capacity of 15x15 cm concrete piles can be equal to 2 tons in the case of previously reinforced buildings, or old foundations, and 1.5 tons in other cases. The results of this study will contribute to the orientation for investors, design consultants, construction quality management agencies to select the appropriate foundation plan in weak geological conditions and for low-rise buildings.
Organisms carrying the microsporidian parasite Enterocytozoon hepatopenaei and some factors affect the microsporidian disease in brackish water shrimp
Authors:   Aquaculture Research Institute 1, Vietnam, Thi May LE , Thi My Hanh TRUONG ,   Aquaculture Research Institute 1, Vietnam, Thi Thanh Vinh TRUONG ,   2 Institute of Agriculture and Natural Resources, Vinh University, Vietnam
Published: September 2022

The microsporidian parasite (Enterocytozoon hepatopenaei - EHP) causes disease related to slow growth in the brackish water shrimp. The disease is determined to be transmitted both vertically (from broodstock to offspring) and horizontally (from infected individuals to heathy ones). This paper reviewed informations from both national and international publications reporting to the EHP cariers which could transmitte EHP to shrimp and some factors that affect EHP disease. The results showed that 15 species could be EHP carriers; those were shrimp (5 species), zooplankton (04 species), crab, eggs shrimps, small shrimps, snail, oysters and polychaete (1 species). EHP has been reported to exist in water, pond bottom and shrimp feces where there was not the present of host or carrier cell. Several factors affecting EHP have been recorded including farming season, age of shrimp, species of shrimp and white feces syndrome.
Analysis of construction project cost risk in bidding documents preparation phase
Authors:   Civil Engineering Department, Vinh University, Vietnam, Trong Ha NGUYEN , Van Long PHAN ,   Civil Engineering Department, Vinh University, Vietnam, Xuan Ha HOANG ,   Civil Engineering Department, Vinh University, Vietnam, Dinh Son LUONG ,   Civil Engineering Department, Vinh University, Vietnam
Published: September 2022

Construction projects usually involve high investments. Hence, the project cost risk analysis during the project bids phase is important. In fact, the costs of construction projects nearly always exceed the planned scenario. This research presents the cost risk analysis method during the project bids phase with the input parameter as the uncertainty variable. The uncertainty variable distribution in this research built on the historical data set of 130 projects invested in the period of 2015-2019. The research has shown that the input parameters as the uncertainty variables are the causes affecting the risks encountered when the contractor executes the project. Moreover, this research also has shown that the Monte Carlo simulation and sensitivity analysis is the tool to detect and risk management.
Species composition of amphibians from Pu Luong Nature Reserve, Thanh Hoa Province)
Authors:   Hong Duc University, Thanh Hoa, Quang Vinh DAU , Thi Hong TRINH ,   Hong Duc University, Thanh Hoa, Dinh Phuong LE ,   Pu Luong Nature Reserve, Thanh Hoa, Van Binh NGO ,   University of Education, Hue University
Published: September 2022

Twenty-eight species of amphibians were recorded from Pu Luong Nature Reserve, Thanh Hoa Province, and twenty-two of them are recorded for the first time from this nature reserve. In terms of conservation concern, three species are listed in the Vietnam Red Book (2007), namely are Megophrys palpebralespinosa, Rhacophorus kio, Ichthyophis bannanicus and twenty-four species are listed in the IUCN Red List (2020), and two species are currently known only from Vietnam.
Determination of vitamin D2 from higher fungi in Vietnam by ultra high performance liquid chromatography (UHPLC)
Authors:   Vinh University, Nghe An, Viet Nam, Van Trung HOANG , Van Quoc NGUYEN ,   Vinh University, Nghe An, Viet Nam, Xuan Thuy HO ,   Vinh University, Nghe An, Viet Nam
Published: September 2022

Vitamins are non-energy substances that are indispensable for the survival and development of organisms. All living processes associated with metabolism in the body are directly involved in the vitamin. In the present study, we determined optimal conditions to determine vitamin D2 content by ultra high performance liquid chromatography (UHPLC). The limit of detection (LOD) is 0.0064 μg/g, limit of quantification (LOQ) is 0.0195 μg/g. The precision and accuracy conforms to AOAC requirements. Thus, the method developed complies with international guides for the determination of vitamin D2 from higher fungi in North Central Vietnam. The results of vitamin D2 function analysis found in mushroom samples ranged from 6.221 - 11.755 μg/g.
Applying machine learning techniques on imbalanced datasets for early prediction of high school student dropout
Authors:   Institute of Engineering and Technology, Vinh University, Duc Quang VO ,   PhD student, Hanoi University of Science and Technology, Thi Lan Anh NGUYEN ,   Dong Hieu High School, Thai Hoa, Nghe An, Hong Man MAI ,   Class 58K4 Information Technology, Institute of Engineering and Technology, Vinh University, Thanh Son CAO ,   Institute of Engineering and Technology, Vinh University; PhD student, Hanoi University of Science and Technology
Published: September 2022

This paper proposes a model for the classification problem on imbalanced datasets, which uses a combination of the SMOTE model and the AdaBoost algorithm for the decision tree algorithm. We make a comparison between the proposed model and the decision tree algorithm using the Gini index and entropy on the collected datasets at Dong Hieu high school, Thai Hoa, Nghe An from 2014 to 2019. The research results can be used as a framework to develop applications supporting the early prediction of the ability of students’ dropout. Based on that results, the managers can analyze and come up with appropriate solutions in order to decrease the school dropout rate.
Triterpenoids from fruit body of Ganoderma australe (Fr.) Pat
Authors:   School of Natural Sciences Education, Vinh University, Vinh City, Nghe An Province, Vietnam, Xuan Hung DO , Trung Hieu TRAN ,   School of Natural Sciences Education, Vinh University, Vinh City, Nghe An Province, Vietnam, Ngoc Quang DANG ,   Department of Chemistry, Hanoi National University of Education, Vietnam, Dinh Thang TRAN ,   Institute of Chemical, Biological and Environmental Technology, Vinh University, Vietnam
Published: September 2022

Ganoderic acid Sz, ganoderic acid Y and ganoderal A were isolated from the methanolic extract of the fruit body of Ganoderma australe. The structures of these compounds were completely elucidated by using a combination of 1D- NMR (1H-, 13C-NMR, DEPT) and 2D NMR (COSY, NOESY, HMQC, HMBC) analyses.
Tunable intersubband absorption spectrum between Landau levels in GaAs/AlGaAs quantum well
Authors:   Vinh University, Nghe An, Viet Nam, The Ngo Vinh DOAN , Thanh Cong NGUYEN ,   https://vujs.vn/api/view.aspx?oldId=NT31-2020
Published: September 2022

Intersubband optical absorption spectrum was studied in quantum well structures in quantizing magnetic field tilted with respect to the structure layers. Violation of the selection rule forbidding optical intersubband transitions in structures made of quantum wells with an asymmetric potential is proposed. The importance of asymmetric structure design to achieve considerable values of optical absorption is demonstrated.
Thinking about training bachelor of law: Current situation and continuous innovation
Authors:   Faculty of Law, Vinh University, Ngoc Thang DINH , Van Dai NGUYEN ,   Faculty of Law, Vinh University
Published: September 2022

Higher education in our country has attained many achievements in recent years. However, in order to match its position and role, and to meet social needs, the standardization of quality assurance and gradual International integration should be raised and effectively implemented. One of the most urgent and long-term strategic issues of social concern is to build an increasingly high-quality education to contribute to improving the people’s intellectual standards and to enhance the quality of Vietnam's human resources in the process of industrialization, modernization, and international integration as well.
Assessing changes of mangrove forest in Bac Lieu Province using multi-temporal satellite images during 1988-2018
Authors:   Dong Thap University, Cao Lanh City, Dong Thap, Vietnam, Son TON , Thai Duong PHUNG ,   Dong Thap University, Cao Lanh City, Dong Thap, Vietnam
Published: September 2022

This study is done to determine the current status of mangrove forests (mangroves) in Bac Lieu Province over the years (1988, 1998, 2013 and 2018), assess the change in mangrove area over specific periods, and at the same time determine causes of disappear and recovery processes. Landsat 5-TM, 8-OLI remote sensing image and Maximum Likelihood Classifier - MCL method were used to classify and assess the changes in the area of mangrove forests in Bac Lieu Province over the period 1988-2018. The results of the image interpretation in 1988, 1998, 2013, 2018 and the overlapping of the above maps show the area of mangroves in Bac Lieu Province has increased continuously from 1988 to 2018. During the 30-year period from 1988 to 2018, the total mangrove area in Bac Lieu increased by 1,069.4 hectares, 1.5 times higher than the original. The recovery rate of mangroves was determined to be 64.3 ha/year, 2 times higher than their disappearance rate during this period (28,7 ha/year). The main reason to the disappearance of mangroves is the conversion from mangroves to aquaculture (accounting for 91.1%), coastal erosion (accounting for 7,9%). Mangroves are restored mainly from coastal seawater surface (accounting for 46,3%), from agricultural land (27.8%), planting mangroves in abandoned shrimp ponds or planting mangroves in combination with aquaculture (accounting for 25,8%).
Rhetorical comparison method in Han Mac Tu’s poems
Authors:   Nghe An College of Arts and Culture, Vietnam, Thi Thanh Duc NGUYEN
Published: September 2022

Han Mac Tu is one of the typical authors in the New Poetry Movement in Vietnam in the 20th Century. With a uniquely creative personality, by using the rhetorical comparison method with high frequency, he has brought to readers unique and surprising imagination, which has created new poetic images and excited fine feelings, mysterious moods, and sorrowful sentiments in human souls. Through the study of the rhetorical comparison method in poems of Han Mac Tu, we have more experience and conditions to reach the poetic language of other authors in the 1932-1945 New Poetry Movement in particular and that of contemporary authors in general.
Developing student self-study capacity through project based learning about saturated hydrocarbons (Chemistry 11) according to blended learning model
Authors:   Hanoi Pedagogical University 2, Van Dai NGUYEN , Thi Trang TRUONG ,   Hanoi Pedagogical University 2, Thi Quynh Anh BUI ,   Hanoi Pedagogical University 2, Thi Tuyet HA ,   Van Coc Secondary School, Hanoi
Published: September 2022

Self-study capacity development is an urgent task at high schools in the current stage of educational reform. This article presents the results of planning and organizing project based learning about saturated hydrocarbons (Chemistry 11) according to blended learning model. Empirical data have shown the feasibility and effectiveness of this measure in developing self-study capacity of students at high school.
Some solutions to develop problem-solving competency of students in General Physics
Authors:   Tran Dai Nghia University, Ho Chi Minh City, Ngoc Dung TRAN
Published: September 2022

Developing student’s problem-solving competency is one of the important tasks in teaching in general and teaching General Physics in particular. Based on the theoretical framework of competency-based learning, we propose a hypothesis on the measures to develop problem-solving competency for students and test it when teaching General Physics to experimental group of students at the School of Military Technical Officers. The three proposed measures include: guiding students to self-study, teaching strategically in class, and assessing learning outcomes. After applying the measures, we conduct a survey to assess the students’ progress in problem-solving competency. The results show that the three measures mentioned in the hypothesis are effective in developing students’ ability to detect and solve problems
Impacts of formative assessment on pedagogical English major’s learning motivation at teacher education universities in Vietnam
Authors:   Vinh University, Vietnam, Van Hai NGUYEN , Thi Mai Hoa NGUYEN ,   Banking Academy, Vietnam
Published: September 2022

The motivation of students to study is crucial to a teaching process, which contributes to shaping student’s attitude vis-à-vis what he/she is learning. Formative assessment, together with curriculum content design and teaching methodology, is recognised as one of the key factors facilitating motivation enhancement. The insights of formative assessment lead stakeholders to the right decision whether to apply formative assessment in one another way. A study on formative assessment literature gave a theoretical frame to mirror how the reality meets criteria. To investigate this reality, we conducted a survey of 116 lecturers and 228 students at three teacher education universities in Vietnam based on Yamane Taro’s simplified sample selection formula. Then the data were analysed by using the software SPSS to produce the percentage, mean value and standard deviation of each answer group. The results show important positive and negative impacts of formative assessment on English major’s motivation. Thence some solutions are suggested to improve student motivation and the quality of English teacher-student training.
Developing a competency framework of sexuality education for primary and secondary teachers
Authors:   Vinh University, Thi Phuong Nhung NGUYEN , Xuan Son PHAM ,   Vinh University
Published: September 2022

The effectiveness of sexuality education for primary and secondary school students is determined mainly by the capacity of teachers. The article publishes initial studies on the competency framework - a criterion for evaluating the competency of primary and secondary teachers in sexuality education, and the basis for teachers and administrators to be aware of the specific needs for sexuality education for students. Based on the Delphi method, which is commonly applied in education science, we have proposed a framework and criteria for assessing sexuality education capacity. The results published, based on consensus of experts, need to be experimentally studied to test their feasibility.
Digital transformation in higher education in Vietnam and its challenges nowadays
Authors:   Vinh University, Thi Duyen HO
Published: September 2022

In June 2020, the Prime Minister has approved the plan for National Digital Transformation Program to 2025, vision to 2030, in which education is one of the most prioritized domains. In this program, higher education takes the pioneer mission to accelerate innovation process, enhance education quality, actively contribute to the nationwide digital transformation. This article researches the meaning of the term “digital transformation” and its impacts, as well as analyzes the application of digital transformation in higher education, in relation to the traditional higher education in Vietnam, in order to understand the insufficiencies of the current model of education and the needs of applying digitalization. The article also names the challenges that education institutions must face when bringing this plan to reality. Defining these challenges is a prerequisite of providing solutions and building the strategy, to ensure the success of digital transformation mission in Vietnam higher education.
Some measures taken by school principals to foster the relationships between school, family and society
Authors:   Thai Phien High School, Ngo Quyen District, Hai Phong City, Anh Tuan HOANG
Published: September 2022

Developing the relationships between school, family and society is a standard set by the Standards for General Education School Principals. This study aims to assess the current situation and propose some solutions to this issue in Hai Phong City. Based on the conceptual framework of the Circular No. 14/2018/TT-BGDĐT on Standards for General Education School Principals, a survey is conducted to assess Hai Phong principals’ performance of the task. Three key solutions are suggested in order to help the principals strengthen the partnership between school, family and society.
Some biological, ecological characteristics of brown planthopper (Nilaparvata lugens Stal.) and chemical prevention measures in Dien Khanh District, Khanh Hoa Province
Authors:   Institute of Agriculture and Natural Resources, Vinh University, Thi Thanh NGUYEN , Thi Soa NGUYEN ,   Khanh Hoa Crop production and Plant protection Sub-Department
Published: September 2022

Brown planthopper Nilaparvata lugens Stal. is one of the current serious rice pests that significantly reduce the productivity of rice plants. Some biological and ecological characteristics of brown planthopper has been studied in different laboratory conditions using VHC rice as food. The experimental conditions included: room temperature at 260C, humidity of 72%; room temperature at 280C, humidity of 70%; room temperature at 300C, humidity of 68%. Their life cycle was recorded 28.80 ± 0.83 days, 27.83 ± 0.82 days and 26.64 ± 0.90 days, respectively. In the condition of temperature at 260C and humidity at 72%, brown planthopper has the highest fertility at 81.35 ± 13.62 eggs/adult, hatching rate is 96.3 ± 2.30%. In the Winter-Spring crop in 2018-2019 in Dien Khanh District, Khanh Hoa Province, brown planthoppers appeared from the tillering stage of rice. The highest density was reached at the stage of milk-ripening rice. The density of brown planthoppers in the early rice crop was lower than that of the main and late rice crops. The VHC rice was higher infected with planthoppers than TH6 variety. Using three chemical insecticides to control brown planthopper including in laboratory and field conditions indicates that Chess 50WG had the highest effectiveness after 7 days of treatment.
Effect of melaleuca biochar on the growth of water spinach (Ipomoea aquatica Forsk)
Authors:   College of Environment and Natural Resources, Can Tho University, Ngoc Thoa PHAM , Le Hoai Ngan TANG ,   College of Environment and Natural Resources, Can Tho University, Huu Chien NGUYEN ,   College of Environment and Natural Resources, Can Tho University
Published: September 2022

Experiments on the effects of melaleuca biochar on the growth of water spinach (Ipomoea aquatica Forsk) under net conditions were conducted at Can Tho University. In the light of these, melaleuca biochar has been adsorbed with nutrients from biogas and utilized in various dosages as a chemical fertilizer replacement for water spinach. Water spinach plants were fertilized with a combination of 25% chemical fertilizers and melaleuca biochar, which absorbed nutrients from biogas. As a result, when compared to chemical fertilizer treatment, they achieved the highest value in terms of plant height (38.6 cm), an average number of leaves (10 leaves), fresh biomass (16.23 g pot-1), and dry biomass (1.21 g pot-1). Furthermore, the nitrate concentration of the vegetable in (NT5) met international quality and safety standards (FAO/WHO, 2002). Henceforth, using melaleuca biochar with chemical fertilizers was able to boost crop productivity is a realistic choice.
Flavonoids and steroids from roots of Millettia speciosa
Authors:   Vinh University, Thi Huong NGUYEN ,   Hong Duc University, Thi Huyen NGUYEN ,   Vinh University, Tan Thanh NGUYEN ,   Vinh University, Xuan Luong NGO ,   Hong Duc University, Thi My Chau LE ,   Vinh University, Thi Hoa Nam PHAN ,   Vinh Technical Education University
Published: September 2022

Study on extracts of Millettia speciosa roots collected at Nghe An Province led to the isolation of two flavonoids, pterocarpine (1), quercetin-3-O-[-L-rhamnopyranosyl-(16)--D-glucopyranoside (2) and two steroids, -sitosterol (3), daucosterol (4). Their structure elucidation were determined on the basis of one and two-dimensional NMR and spectrometric methods in combination.
Reliability assessment of strength resistance of circular steel - reinforce concrete conjugate column considering metal atmospheric corrosion
Authors:   Civil Engineering Department, Vinh University, Trong Ha NGUYEN , Thanh Phuc VO ,   Hatecco Construction Company Limited, Vinh Long Province, Hoa Hiep NGUYEN ,   Graduate student of Course 27 - Civil Engineering, Vinh University, Viet Dong LE ,   Center of Experimental Practice, Vinh University
Published: September 2022

The bearing capacity of steel - reinforced concrete composite column depends on the geometrical dimensions, structural composition and mechanical properties of the material. In fact, these factors are random, especially when considering the atmospheric corrosion of metals. This paper presents the reliability assessment of strength resistance of circular steel - reinforced concrete composite column considering metal atmospheric corrosion. An uncertainty model is constructed based on the combination of deterministic design model according to Eurocode-4 with the input parameters and the corrosion model being random. The reliability of the column was assessed using Monte Carlo simulation method. The calculation program is built on Matlab platform allows the authors to conduct numerical surveys and draws conclusions and recommendations from the calculations results.
The diversity of Lauraceae family in Pu Huong Nature Reserve, Nghe An Province
Authors:   Vinh University, Tien Cuong NGUYEN , Ngoc Dai DO ,   Nghe An Economics University, Van Chung MAI ,   Vinh University, Hong Ban PHAM ,   Vinh University
Published: September 2022

This paper presents research results on family Lauraceae in Pu Huong Nature Reserve, Nghe An Province. Total 73 species belonging to 13 genera were identified. There were 6 genera and 15 species found as new records for the plant list of Pu Huong published in 2015. Cinnamomum was the richest genus (19 species), then followed by Litsea (17 species), Neolitsea (7 species), and other genera (1 to 6 species). In family Lauraceae of Pu Huong Nature Reserve there were 4 threatened species listed in the Red Data Book of Viet Nam (2007): Cinnamomum parthenoxylon, Cinnamomum balansae, Phoebe macrocarpa and Cinnamomum cambodianum. The useful species of the Lauraceae family is categorized as: 48 timber species, 38 essential oil species, 28 medicinal species, 16 fatty oil and 1 ornamental species. The spectrum of biology of the Lauraceae family in Pu Huong Nature Reserve is summarized as follows: Ph% = 13.70%Mg + 45.20%Me + 38.36%Mi + 1.37%Na + 1.37%Lp. The Lauraceae family in Pu Huong Nature Reserve mainly comprised of the tropical element (39.74%), endemic element (57.52%), temperate element (2.74%).
ON NILPOTENT COINVARIANT MODULES
Authors:   Department of Research and International Affairs, Vinh University, Duc Tai DINH , Viet Hung DINH ,   Vung Tau High School, Vung Tau
Published: September 2022

A module is called nilpotent-coinvariant if it is invariant under any nilpotent endomorphism of its projective cover. Some properties of this class of these modules were investigated by Truong Cong Quynh, Adel Abyzov, Dinh Duc Tai [8]. In this paper, we continue to study nilpotent-coinvariant modules over general covers
On nilpotent - invariant modules
Authors:   Dept. of Research and International Affairs, Vinh University, Duc Tai DINH
Published: September 2022

A module is called nilpotent-invariant if it is invariant under any nilpotent endomorphism of its injective envelope. The class of these modules is studied, and some of their properties are developed. In this paper, we continue to study nilpotent-invariant modules over general envelopes.
Research using the Wendland RBF for the RBF-FD method to solve the Poisson equation in 3D
Authors:   University of Information and Communication Technology, Thai Nguyen University, Manh Tuong NGO , Thi Thanh Giang NGUYEN ,   University of Information and Communication Technology, Thai Nguyen University, Thi Nhung NGUYEN ,   University of Information and Communication Technology, Thai Nguyen University
Published: September 2022

In recent years, the meshless finite difference method based on radial basis functions (RBF-FD) of solving partial differential equation in 3D has been studied by many scientists. To find the RBF-FD weight vector, the authors used the Power RBF interpolation, which does not depend on the shape parameter. This paper presents the research results of using Wendland RBF interpolation to find the weight vectors for the RBF-FD method to solve Poisson equations in 3D. The numerical experiments showed that the solution of the RBF-FD method using the Wendland function has good accuracy compared to the solution of the finite element method (FEM - Finite Element Method).
Free oscillation analysis of rectangular plate of porous FGM material placed on a Winkler elastic base by analytical method
Authors:   Department of Construction, Vinh University, Xuan Thuc PHAN , Thi Quynh NGUYEN ,   Department of Construction, Vinh University
Published: September 2022

In this paper, classical plate theory is used to analyse free oscillation of rectangular plates made of porous FGM material, edge joints on Winkler elastic base. Three different types of pore distribution: uniform distribution, symmetric irregular distribution and asymmetrical irregular distribution are investigated. The reliability of the analytical solution as well as the calculation program written on Matlab are verified with some published results and with the results calculated by the SAP2000 structural calculation software. The influence of the material parameters, the geometrical dimensions of the plate, as well as the background coefficient on the free oscillation frequency of the plate are evaluated.
The need for evaluation and review of life values in Vietnamese prose after Doi Moi from the perspectives of writer characters
Authors:   Faculty of Education, Khanh Hoa University, Nha Trang, Thi Thu Huong PHAM
Published: September 2022

The year 1986 marked an important milestone in Vietnamese society, creating important changes in all fields including literature. The article explores the need to review and re-evaluate life values Vietnamese prose in post-Doi Moi era from perspective of the writer characters system. Viewed from this type of character, it is possible to understand more about the cognitive needs of the authors, namely the writer's need to show their social responsibility, their awareness of the current state of the country, and their search for new art forms. By surveying a number of typical works that build the image of writer characters, the article aims to contribute to affirming the spirit of self-awareness in Vietnamese literature after Doi Moi.
Applying Ho Chi Minh’s thought to build and train the revolutionary ethics for cadres and civil servants in the new context
Authors:   Vinh University, Thai Son NGUYEN , Huu Loi NGUYEN ,   Go Cong Town, Tien Giang Province
Published: September 2022

Building a contingent of cadres and civil servants with sufficent capacity, quality and prestige to meet the requirements and tasks in the new context with noble revolutionary ethics is an urgent and important task to ensure the survival of the current Vietnamese political system. Applying the precious thoughts of President Ho Chi Minh to build and train revolutionary ethics for cadres and civil servants is the right way, the right measures that need to be further researched and promoted to bring about practical results. This article briefly presents the main points in Ho Chi Minh's thought on revolutionary ethics of cadres and civil servants, thereby proposing the main contents in applying Ho Chi Minh's thought to train revolutionary ethics for cadres and civil servants in the current context.
Colonial roads in Vietnam during the period 1884-1918
Authors:   Institute of History, Vietnam Academy of Social Sciences, Thi Hai TRUONG
Published: September 2022

Road traffic played an important role in the infrastructure construction plan of the French colonialists in Vietnam. That role is reflected in both military and economic aspects. Road traffic in the colonial society was divided into colonial roads, regional roads, infiltration roads, provincial roads, etc. In which, colonial roads were of national and transnational importance, which connected the Indochinese countries. This article aims to study colonial roads in Vietnam in the period 1884-1918. The main aspects examined include the description and evaluation of changes in the colonial road situation over the two periods namely 1884-1897 and 1897-1918, and the initial assessment of the effect of the improved road system on the French colonial rule and Vietnamese social life.
Protection mechanism of the business “brand” under the law of Vietnam
Authors:   Vinh University, Thi Thuy Lieu PHAM
Published: September 2022

Protection of “brand” (brand) aims at not only ensuring the quality of goods and services for consumers and consumption markets but also the development of enterprises for domestic and foreign markets. Brand is an intellectual property that needs to be considered, cared for and invested in because the value it brings to the success of the business is huge. The article focuses on researching legal issues of trademark protection, infringement acts and measures to protect trademarks of enterprises.
The role of Nguyen An Ninh with the organization “High aspiration Youth” from 1925 to 1935
Authors:   Department of Education and Training of Ho Chi Minh city, Van Gia Thuy NGUYEN
Published: September 2022

“High aspiration Youth”, the first political organization of the commoners in Cochinchina, was founded by Nguyen An Ninh in late 1924 and early 1925. The organization’s name is derived from the theme of the speech: “Idéal de la jeunesse Annamite” (The ideals of An Nam youth) by Nguyen An Ninh at the headquarters of Study Promotion Association in Saigon in 1923. Established in a state of political unrest, “High aspiration Youth” not only raised public awareness of politics, organized and directed people’s movements, but also contributed to the increasing power of the Communist Party in their leadership role of the Vietnamese revolution under the Flag of Marxism-Leninism. The article clarifies Nguyen An Ninh’s role with the foundation, activities and contributions of the “High aspiration Youth” in the national liberation movement in Cochinchina from the mid-20s to the mid-30s of the twentieth century.
Melatih Kecerdasan Visual-Spasial Siswa SMA dengan Scaffolding Berbantuan Media 3D
Authors: Kartika Hendra , Firmansyah Dani
Published: September 2022

Kecerdasan visual-spasial merupakan salah satu kecerdasan majemuk (multiple intelligence) yang dimiliki oleh setiap individu. Kecerdasan ini perlu dilatih dan dikembangkan pada diri individu karena setiap individu memiliki tingkat imajinasi dan kepekaan ruang yang berbeda-beda. Selain itu, perlu adanya metode yang dapat mengembangkan kecerdasan visual-spasial tersebut. Salah satu metode yang dapat digunakan adalah memberikan latihan penyelesaian masalah dengan scaffolding menggunakan media pembelajaran 3 dimensi (3D). Metode yang digunakan dalam kegiatan ini adalah pelatihan dengan scaffolding berbantuan media 3D. Pada kegiatan ini, siswa diberikan latihan soal visual-spasial. Hasil kegiatan menunjukkan bahwa terdapat peningkatan pemahaman siswa tentang pentingnya melatih kecerdasan visual-spasial untuk kegiatan psikotes masuk perguruan tinggi, tes masuk kerja, dan sebagainya.
The Guitar as an "Open-Air" Instrument in the Early Romantic Era
Authors: Poulopoulos Panagiotis
Published: September 2022

In the first decades of the nineteenth century, playing music outdoors became a popular trend in Europe and North America. This largely reflected the Romantic ideal of coming closer to nature, whose allure played a significant role in contemporary education, literature, art, fashion, and music. By investigating a wide variety of written and pictorial sources, as well as surviving instruments in museum collections, this article discusses the development of the guitar as an “open-air” instrument as epitomised by the invention of guitar variants for use “on the go”. Moreover, the article sheds new light on the guitar’s connections to other portable wind and keyboard instruments, such as the csakan or the orphica, which were designed to provide musical accompaniment “al fresco”.
Fernando Sor on the Move in the Early 1820s
Authors: Stenstadvold Erik
Published: September 2022

This article adds to our knowledge of Sor’s final months in London in 1822 and his subsequent Paris sojourn before he went to Russia in 1823. Central to Sor’s activity during this period was his involvement in the ballet Cendrillon, for which he wrote the music. Hitherto unknown reviews of the premiere at the King’s Theatre on March 26, 1822, show that both the ballet and the music were consistently well received by the London critics. This success led to action being taken to have the ballet staged at the Paris Opéra, and in the fall that same year Sor went to Paris, most probably in order to attend the preparations of the production there. During the long production period before the Paris premiere on March 3, 1823, Sor played in a number of concerts in the French capital, most of which have previously been unrecorded. Many of these concerts were reviewed in the press, and Sor was unanimously praised for his guitar playing. The Paris critics were, however, less enthusiastic about his ballet music than their London counterparts had been.
Meningkatkan Motivasi Kinerja Guru Melalui Kompetensi Manajerial Kepala Sekolah
Authors: Sudiarthi Tati
Published: September 2022

Penelitian ini dilaksanakan berdasarkan adanya permasalahan rendahnya motivasi kinerja guru. Rendahnya motivasi guru dalam mengajar hal ini disebabkan karena guru mengalami beban kerja yang terlalu sulit serta waktu dan peralatan kerja yang kurang memadai. Kondisi ini mengakibatkan tekanan besar pada guru sehingga motivasi kerja menurun. Tujuan penelitian ini adalah untuk menganalisis perkembangan kinerja guru melalui kompetensi manajerial kepala sekolah. Jenis penelitian ini adalah penelitian tindakan sekolah yang dilaksanakan dalam dua siklus. Setiap siklus dilaksanakan dengan empat tahapan, yaitu perencanaan, pelaksanaan tindakan, observasi, dan refleksi. Penelitian ini dilaksnakan pada tahun 2022 di SDN Sagara Kabupaten Majalengka dengan subjek penelitian para guru sekolah dasar sebanyak 8 orang. Metode pengumpulan data pada penelitian ini yaitu observasi dan kuisioner. Data yang terkumpul diolah dengan teknik analisis desriptif kualitatif. Hasil penelitian menunjukkan motivasi guru meningkat dari siklus I ke siklus II. Demikian dapat disimpulkan bahwa kepala sekolah dapat meningkatkan motivasi kinerja guru SDN Sagara Kabupaten Majalengka.
Supervisi Akademik Pengawas Sekolah Untuk Meningkatkan Kinerja Guru Sekolah Dasar
Authors: Dasti Dasti
Published: September 2022

Guru merupakan faktor kunci untuk mencapai tujuan pendidikan. Namun beberapa studi menunjukkan kinerja guru masih rendah, sehingga perlu dilakukan upaya untuk meningkatkannya. Penelitian ini berupaya untuk meningkatkan kinerja guru sekolah dasar melalui pelaksanaan supervisi akademik oleh pengawas sekolah. Penelitian ini merupakan penelitian tindakan sekolah dengan menerapkan tahapan perencanaan, pelaksanaan, pengamatan, refleksi. Penelitian ini dilaksanakan pada sekolah binaan di Kecamatan Argapura, Kabupaten Majalengka pada tahun 2022. Subjek penelitian ini adalah guru SD yang berada di kecamatan berjumlah 16 orang. Teknik pengumpulan data menggunakan teknik observasi, dengan mengamati indikator-indikator kinerja guru. Hasil penelitian menunjukkan bahwa kinerja guru sekolah dasar menunjukan peningkatan dari siklus 1 hingga siklus 2. Kesimpulan penelitian ini adalah pelaksanaan supervisi akademik dapat meningkatkan kinerja guru sekolah dasar di Kecamatan Argapura Kabupaten Majalengka.
Kajian Meta Analisis: Meningkatkan Hasil Belajar Siswa sekolah dasar Dengan Model Problem Based Learning
Authors: Olivia Mitha , Ananda Dea , Indarini Endang
Published: September 2022

Education is a very important thing for humans which aims to humanize humans and make the abilities and qualities possessed by humans to be superior and advance the life of the nation. The purpose of this study is to determine whether the Problem Based Learning Model from several published meta-analytical studies can have an effect on improving the learning outcomes of elementary school students. This study uses a type of meta-analysis research. The results of the Effect Size test prove that the Problem Based Learning model has a small effect on improving the learning outcomes of elementary school students. In addition, the results of the Ancova Problem Based Learning model have an average value of 80,0800. So it can be concluded that the Problem Based Learning learning model is effective if applied in improving the learning outcomes of elementary school students.
Keadilan Prosedural Partisipatif dan Pengembangan Karir Untuk Meningkatkan Kinerja Karyawan
Authors: Rusyanti Rusyanti
Published: September 2022

Performance is the work achieved by a person in carrying out his duties or work both in quantity and quality, namely in accordance with responsibilities and is the result of work that has been achieved by someone with predetermined standards. This research was conducted at PT. Pancaragam Toyindo Majalengka, as for the purpose of this study is to determine the effect of participatory procedural justice variables and career development on employee performance. The research method used in this research is a survey method with a descriptive verification approach. The data obtained are primary data, namely data from respondents' responses which are distributed to respondents. The population of all employees as many as 200 people and a sample taken is 100 people. The analytical tools used in this research are validity test, reliability test, classical assumption test, multiple linear regression, coefficient determination and hypothesis testing, for partial test using t-test and model feasibility test. Based on the results of hypothesis testing, participatory procedural justice has a positive and significant effect on employee performance. Career development has a positive and significant effect on employee performance.