bluuebunny/crossref_metadata_2025 huggingface dataset:
The British Columbia College of Teachers: An Obituary
Authors: Glegg Alastair
Published: March 2020

Abstract:The British Columbia College of Teachers operated from 1987 to 2011, a period extraordinary for the amount of conflict generated. The British Columbia Teachers’ Federation appeared to view the College not as a professional association, but as an extension of the union. It came into conflict with the universities over teacher training, and appeared reluctant to discipline members, or to listen to complaints against teachers. Following a highly critical report the College was replaced by the B.C. Teachers’ Council, a body much more tightly controlled by the Ministry of EducationRésumé:Le British Columbia College of Teachers (l’association professionnelle des enseignants de la Colombie Britannique) a existé de 1987 à 2011. Cependant, la Fédération des professeurs de cette province percevait ce regroupement non pas comme une association professionnelle mais plutôt comme un syndicat. Ce fut une période agitée due au nombre de conflits générés par cet organisme. Ainsi, le « College » est entré en conflit avec les universités au sujet de la formation des maîtres, il n'imposait aucune discipline à ses membres et ne tenait pas compte des plaintes formulées contre eux. À la suite d’un rapport très critique à son endroit, le « College » fut remplacé par le B.C. Teachers’ Council, organisme sous le contrôle rigoureux du ministère de l’Éducation.
Managing the Muses: Musical Performance and Modernity in the Public Schools of Late-Nineteenth Century Toronto
Authors: Booth Geoffrey
Published: March 2020

Abstract:This paper employs the lens of sensory historical analysis to examine public school music in the making of a modern middle class in late-Victorian Toronto. Its aim is to show how this subject both shaped and was shaped by the culture of modernity which increasingly pervaded large urban centres such as Toronto during the course of the nineteenth century. The paper goes beyond pedagogic and bureaucratic justification, to present the evolution of school music within a much broader acoustic framework, that is, to weave it into the increasingly-urban soundtrack of Toronto, to gain some appreciation of how it would have been heard and understood at the time. Its aim is to offer historians of education an understanding of what actually occurred in the classrooms of Toronto during the period by listening to these experiences and the acoustic environment in which they would have been understood.Résumé:Cet article analyse le rôle joué par les cours de musique dans les écoles publiques de Toronto dans le processus de formation de la classe moyenne à l'époque victorienne. L'auteur propose une analyse historique sensorielle afin de démontrer comment cette matière scolaire a influencé et était influencée par la culture de modernité dont s'imprégnaient graduellement les grands centres urbains au cours du dix-neuvième siècle. Au-delà des justifications pédagogiques et bureaucratiques, il présente l’évolution des cours de musique dans un cadre élargi en lien avec la musique diffusée dans cette ville aux sonorités de plus en plus urbaines. Il veut ainsi favoriser une meilleure compréhension de ce qu'était le contexte sonore et sa réceptivité chez les auditeurs à cette époque. Ce texte trace pour les historiens de l'éducation un portrait de l'évolution de l'enseignement de la musique dans les classes torontoises dans le contexte particulier de la nouveauté musicale.
Establishing Pathways for Woman in Education: Never-Married Women Career Teachers
Authors: Ensslen Christine , Corman June
Published: March 2020

Abstract:This paper examines the professional activities of never-married women teachers. The ‘spinster’ teacher was not considered a potential ideal career teacher, in part, because women were not considered long-term workers. Until the mid-1940s, most school districts refused to hire married women teachers and so remaining single was the only option to continue in the profession. These career teachers were forced to deal with the same short shrift faced by young short-term women teachers though they were trying to establish themselves in the profession. Without established pathways and facing discrimination in employment, these never-married women persevered to have long careers and to make contributions to their professional associations. These teachers were in the forefront of women who broke the glass ceiling into what had been male preserves in the profession and in teachers’ associations.Résumé:Cet article s'intéresse aux activités professionnelles des enseignantes qui ne se sont jamais mariées. Il était difficile d'imaginer des enseignantes « vieilles filles » comme des femmes faisant carrière en partie parce qu'on ne les voyait pas comme travailleuses à long terme. Jusqu’au milieu des années 1940, la plupart des commissions scolaires refusaient d’engager des enseignantes mariées et la seule option pour poursuivre dans l'enseignement était de rester célibataire. Ces femmes de carrière étaient confronté aux mêmes difficultés que les jeunes travaillant à court terme malgré leurs efforts pour s’établir dans le métier. Ne jouissant d'aucun précédent, elles ont eu à affronter de la discrimination à l’embauche. Pourtant, ces femmes célibataires ont persévéré en menant de longues carrières et en participant à leurs associations professionnelles. Ces enseignantes étaient au premier rang parmi ces femmes qui ont brisé le plafond de verre en entrant dans les domaines auparavant réservés exclusivement aux hommes tant au sein de la profession que dans les associations professionnelles.
Elaboration and pilot testing of a technology for production of sheet rolled products of cryogenic grade steels for liquidized natural gas storing
Authors: Pemov I. F. , Yakushev E. V. , Zubov S. P. , Pridein A. A. , Prokopenko L. V. , Samokhina O. V. , Nizhel’skii D. V.
Published: March 2020

The liquidized natural gas (LPG) as well as other liquidized gases, as oxygen, nitrogen, ethylene etc. are widely used in the today’s world economy. A perspective of LPG and liquidized gases application presented, foreign and domestic experience in production of materials, used for manufacturing tanks and reservoirs, intended for storing and transporting of LPG, considered. Influence of chemical composition of cryogenic steels on resistivity to fragile destruction at negative temperatures studied. Influence of various alloying elements, including nickel, manganese, chrome, molybdenum and other elements on operating properties of cryogenic steels were also studied. Specialists of JSC “Ural Steel” together with scientists of JSC “NPO “CNIITMASH” elaborated a comprehensive technology of industrial production of plates of cryogenic steels. Based on literature data, domestic practice of designing and manufacturing cryogenic equipment, specifications of the required application plates were elaborated and approved. The rolling of plates of wide range of thickness of pilot heat 0H6 steel was carried out. At present, the thermal treatment modes of the 0H6 steel rolled products are being adjusted.
Elaboration of design and calculation of energy and power parameters of a facility for lime unloading from a shaft furnace
Authors: Eron’ko S. P. , Danilov V. L. , Tkachev M. Yu. , Tinyakov V. V.
Published: March 2020

Operation of shaft furnaces for lime burning in the required technological mode to a great extent is effected by reliability and technical abilities of their finished product unloading systems. A system proposed for unloading a shaft furnace for lime burning, enabling to deliver in a stable mode crashed material providing it has large sintered pieces. The system includes a stationary round table, located symmetrically relating the vertical axis of the furnace body under the conical collector exit opening. The table has four semi-round scraper knives connected by hinges with four pushing rods, acting by drive hydraulic cylinders. Alternately one pair of cylinders is working for pushing, the other – for pulling the rods. It results in the scraper knives making turn motions relatively the table, rolling along its edge and pushing off it bulk material by their back round part. To design a pilot sample of the proposed unloading system for shaft burning furnace, a methodology was elaborated to calculate its power parameters. The methodology takes into account the technological loads, arising at the realization of the process of measured delivery of the burnt lime from the furnace. The proposed methodology enables to determine the required values of pressure and consumption of oil station working liquid. The oil station provide operation of the cinematically interconnected four hydraulic cylinders, which make the two pair of scraper knives moving along a set trajectory on the table surface of the furnace to deliver from it the bulk material. The rightness of the technical solutions applied to the design of the elaborated shaft furnace unloading system as well as the correctness of the proposed theoretical dependences used for calculation of its energy and power parameters, were confirmed by the experiments. The experiments were carried out at an operating physical model, manufactured in the scale 1:10 to the natural facility.
Smoking, vaping and hospitalization for COVID-19
Authors: Farsalinos Konstantinos , Barbouni Anastasia , Niaura Raymond
Published: March 2020

The study presents an analysis of the current smoking prevalence among hospitalized patients with COVID-19 in China, compared to the population smoking prevalence in China (52.1% in males and 2.7% in females). Through a systematic research of the literature (PubMed) we identified 7 studies examining the clinical characteristics of a total of 2352 hospitalized COVID-19 patients that presented data on the smoking status. The expected number of smokers was calculated using the formula Expected smokers = (males x 0.521) + (females x 0.027). An unusually low prevalence of current smoking was observed among hospitalized COVID-19 patients (8.7%, 95%CI: 7.6-9.9%) compared to the expected prevalence based on smoking prevalence in China (30.3%, 95%CI: 28.4-32.1%; z-statistic: 22.80, P < 0.0001). This preliminary analysis does not support the argument that current smoking is a risk factor for hospitalization for COVID-19, and might even suggest a protective role. The latter could be linked to the down-regulation of ACE2 expression that has been previously known to be induced by smoking. However, other confounding factors need to be considered and the accuracy of the recorded smoking status needs to be determined before making any firm conclusions. As a result, the generalized advice on quitting smoking as a measure to improve health risk remains valid, but no recommendation can currently be made concerning the effects of smoking on the risk of hospitalization for COVID-19. No studies recording e-cigarette use status among hospitalized COVID-19 patients were identified. Thus, no recommendation can be made for e-cigarette users.
Keywords. SARS-CoV-2, COVID-19, ACE2, expression, susceptibility, smoking, hospitalization, electronic cigarette.
THE ARCHITECTURE OF A VIETNAMESE 32-BIT RISC MICROPROCESSOR, THE VN1632
Authors: Ngo Hoang Duc , Hau Hoang Nguyen Thanh , Nguyen Quoc Phu , Do Quynh Ngoc
Published: March 2020

VN1632 is the first 32-bit Vietnamese-designed microprocessor. Its design is based on the Harvard 32-bit RISC architecture but with a five-stage pipeline. This article presents the architecture overview and the implementation of the microprocessor. The overview shows main features, the block diagram and descriptions of most salient blocks, namely registers and pipeline. The implementation describes the design detail of each block. A detailed simulation was carried out to check the overall performance of the design which was then entrusted to an American fab for fabrication using the 0.13um IBM process. Testing results of VN1632 proved that the architecture works correctly with desired performance.
CATALYSTS TO TREAT POLLUTION GASES OF THE INCINERATORS
Authors: Le Lu Van , Le Tiep Van
Published: March 2020

Incineration is a useful way to treat industrial and medical waste. However, the combustion process in the incinerators can produce many toxic gases like nitrogen oxides (NOx), monoxide carbon (CO), hydro cacbon (HC). In this paper we present the study and design of the deNOx and oxidation catalyst system, which can be used to treat pollution gases NOx, CO, HC that are produced in the incinerators. The study results show good prospect for applying the treatment system in Vietnam industry.
EFFECT OF HEAT TREATMENT ON NANOCLAY DISPERSING IN NATURAL RUBBER
Authors: Do Son Thanh Thanh
Published: March 2020

Nanocomposites of Nanocor® I.30E and natural rubber grade SVR 3L are investigated. The mixing process is conducted by two-roll mill at different conditions. The structures of clay in rubber matrix are characterized by XRD and SAXS. By premixing the material by two-roll mill at room temperature following with treating at high temperature (about 100°C) the interlayers spacing can reach to 5,17nm in case of surface heating in an oven and 4.73nm and more in case of internal heating in microwave oven. In some cases an exfoliation can be attained.
RESEARCH INTO FABRICATION PA6/CLAY-NANOCOMPOSITES IN ORDER TO MAKE WATER LUBRICATED STERN TUBE BEARINGS
Authors: Nguyen Nieu Huu , Duong Tien Tu , Nguyen Cuong Tien , Nguyen Duong Hoang
Published: March 2020

In this research, the preparations of PA6/Clay (4% namomer I.30TC) nanocomposites by melt-intercalation process were carried out. The mechanical properties, impact energy, heat deflection temperatures (HDT) and tribology properties of these nanocomposites in the case of being annealed and water saturation were determined and compared to PA6 and Capron. All of the properties of these nanocomposites were better than those of Russia’s Capron and PA6. These nanocomposites were used to make water lubricated stern tube bearings. The study shows promissing results.
ANTICORROSION OF STEEL IN CONCRETE BY MODELLING THE TIDAL ZONE CONDITIONS
Authors: Phan Dao Thi Anh , Nguyen Loc Thanh
Published: March 2020

The study of steel anticorrosion in concrete in tidal zone was performed in the laboratory with a model using sodium chloride solution with 10 % and 20% concentrations. We applied different metal protection methods including treatment of concrete environment, and treatment of rebars such as epoxy coating and electrochemical protection. Evaluation methods of the corrosion include stress test (TCVN 1824-1993) and polarization resistance measurement (ASTM G59-97 (2003)). The obtained results can be used to find the suitable solutions of corrosion protection for concrete in tidal zone.
BUILDING THE MODEL OF MANAGEMENT AND INFORMATION SHARING OF ENVIRONMENTAL WATER QUALITY – DONG NAI BASIN AS A CASE STUDY
Authors: Bui Long Ta , Cao Truong Duy , Hoang Huong Thi My
Published: March 2020

Recently, due to the impact of natural factors and human activities, the water quality in several basins in Vietnam has been seriously degraded. Pressing issues happening in the entire river basin-scale is polluted by waste from urban and industrial areas, oil spills and waste management. So far the system of policies and legal documents relating to protection of water quality basin is still missing and not synchronized, ensure funding for activities to protect water quality basin not meeting actual requirements. In particularly, there is no information data system to cater for the management of basin water quality which is the core of the problem of environmental protection of river basins. The main reason that make pollution happened at the entire river basin scale is bad waste management. which partly due to the lack of a good system of technical data and legal documents related to protection of river basin water quality. In this paper, we present research results from the process of building model for management and information sharing of environmental water quality at Dong Nai river basin.
FORECASTING ENVIRONMENT POLLUTION LEVELS BY INDUSTRIAL DEVELOPMENT ARISING TO 2020 IN LONG AN PROVINCE
Authors: Nguyen Phuoc Van , Nguyen Hien Thi Thu , Cao Truong Duy , Nguyen Lam Minh
Published: March 2020

In this article, the results of predicted environmental pollution load of air, water and solid waste by the operation of the park / industrial zones in Long An province by 2020 are presented. Two mathematic model, ISC3 and Mike 11, were used to determine the spread of environmental pollution of air and water. The results showed that, to make the air environment quality meet QCVN standard, we need to cut gas emission to 57% by 2015 and 80% by 2020. For water environment, the forecast maps on spread of water pollution can help to identify the source that cause water pollution.
PERFORMANCE BEHAVIOUR OF LABSA IN A COMBINED STEEL PICKLING AND DEGREASING SOLUTION
Authors: Nguyen Tru Nhi , Tran Han Mai , Nguyen Truc Tu Thuy Thanh
Published: March 2020

Steel degreasing and pickling effect of the acid solutions at various LABSA concentrations and different applied temperatures, combined with ultrasound sonication (35 kHz) has been investigated. From the obtained results, a solution with 10% H2SO4, 3.5 g/l hexamethylenetetramine and 2% LABSA could be used for combined steel degreasing and pickling. The degreasing activity of the solution is considerably increased when sonicating with 35kHz ultrasound, as well as when increasing treatment temperature. It was clarified that beside traditional degreasing effect of an anionic surfactant, LABSA could be used as an acid pickling component. LABSA is also incorporated into the interlayer space of rust to form an ordered organo-rust substances, which influence on the pickling activity of the solution.
APPLICATION OF REMOTE SENSING AND GIS MONITORING URBANIZATION IN HO CHI MINH CITY THROUGH IMPERVIOUS SURFACES
Authors: Tran Van Thi
Published: March 2020

Impervious surface can be used as an indicator in assessing urban environments. In this study, we have used method of remote sensing through the impervious surface to detect urban area in Hochiminh city with good accuracy above 96%. The high accuracy of the measurements come from the application of techniques such as extraction of training samples based on brand ratios, supervised classification in combination with suplement GIS data. This method, in combination with the Landsat image database, can be ultilized in monitoring the development of urbanization in Hochiminh city.
APPLICATION MONTE-CARLO METHOD TO ESTIMATE UNCERTAINTIES IN THE RESULTS OF AIR QUALITY MODELLING: THE CASE OF HO CHI MINH CITY
Authors: Ho Quoc Bang
Published: March 2020

Air pollution has deteriorated considerably the health of millions of people in Ho Chi Minh City (HCMC) due to high levels emissions. It has been showed that more than 90% of children under the age of 5 years old suffered from different respiratory illnesses in the city. The objectives of this research include: (1) studying the formation of the pollution plume over the city during a 3-day episode in February 2006 and (2) estimating uncertainties in the results of air quality simulations for HCMC. Research results show evidence of the development of a Ozone (O3) pollution plume in the north-western part of the city. A scenario for reduction of air pollution is studied in this work to help the local government to make decisions for managing air quality in HCMC. For making a better-informed decision, the probabilistic estimate for the photochemical model is carried out in this research. The Monte-Carlo method that is applied in this research for the uncertainty analyses is an efficient method of producing a probabilistic output from the photochemical model. The results of abatement strategy showed that if the local government follows the emission control plan: by 2020, the O3 concentration will be decreased by 30% compared to the recent O3 concentration.
PCDD/FS LEVEL IN HUMAN ADIPOSE TISSUE OF BIENHOA RESIDENTS IN COMPARISON WITH DEVELOPED INDUSTRIAL COUNTRIES
Authors: Mai Anh Tuan
Published: March 2020

Dioxin exhibits serious health effects when it reaches as concentration a few ppt in human body fat. Dioxin is a powerful hormone disrupting chemical. By binding to a cell's hormone receptor, it literally modifies the functioning and genetic mechanism of the cell, causing a wide range of effects, from cancer to reduced immunity, nervous system disorders, miscarriages and birth deformity. Median i-TEQ in adipose tissue of the BienHoa residents is comparable with that of the developed countries while mean i-TEQ of the Bien Hoa residents is higher in both groups, especially older people group. This group has some exceptional cases with i-TEQ value up to 1148.7pg/g. The i-TEQ value in our studies is higher than that conducted by other studies. However, our result supports a conclusion: at present, the dioxin concentration in natural environment and human bodies in Southern Vietnam is only a residue and not higher than that in developed countries.
ECONOMIC DEVELOPMENT UNDER REFORM AND WORLD INTEGRATION AND THE MAIN FACTORS INFLUENCING THE ECONOMIC GROWTH IN VIETNAM
Authors: Nguyen Canh Thi , Tran Son Hung
Published: March 2020

The purpose of this paper was to give an overview of economic development under reform and world integration and to evaluate the main factors influencing the growth of the Vietnamese economy during the reform period (1990-2009). Based on statistical data on the Vietnamese economy in the period of 1990-2009, this study analyzed the factors affecting economic growth. The policy changes, economic development, poverty rates and living standards of Vietnamese population are analyzed over the reform period using qualitative methods. The results of this study show that economic growth under reform and world integration has reduced the poverty rate and increased living standards of population in Vietnam. An evaluation of the factors influencing economic growth is made using a quantitative model of total factor productivity (TFP) and another econometric model. The findings from this quantitative analysis show that the growth of the Vietnamese economy was determined by two factors: (1) capital investments, including foreign direct investment (FDI) and (2) the growth of exports. The results of these qualitative and quantitative analyses lay the foundation for policy recommendations for Vietnam Government to develop economy in the future.
THE DETERMINANTS OF CAPITAL STRUCTURE FOR VIETNAM’S SEAFOOD PROCESSING ENTERPRISES
Authors: Nguyen Canh Thi , Nguyen Cuong Thanh
Published: March 2020

The goal in this paper is to assess the determinants of capital structure for Vietnam’s seafood processing enterprises (SEAs) in comparison with enterprises of other processing industries (DIFs). The result of this study was based on applying Shumi Akhtar’s model (2005) [22] and Shumi Akhtar, Barry Oliver’s (2005) [23] and using data of 302 enterprises, including 63 in fisheries industry, across 5 years from 2004 to 2008. Total observations were 772, including 284 and 488 for models applied to seafood processing enterprises and others respectively. The results show that capital structure differs between SEAs and DIFs. Accordingly, size and collateral value of assets were found to be significant determinants of capital structure for both SEAs and DIFs. For SEAs, profitability, growth, agency costs and interest expense affect the capital structure and play a crucial role. Meanwhile, bankruptcy risks and age of enterprises are essential determinants for DIFs. In relation to interaction effects, size and collateral value of assets are significant in explaining the differences in the capital structure of SEAs relative to that of DIFs. Finally, determinants of capital structure rarely varied over the sample period for both SEAs and DIFs. The findings suggest implications for Vietnam’s seafood processing enterprises (SEAs) on flexible usage of financial leverage. Specifically, to increase or decrease the level of financial leverage, SEAs need to take into account size, collateral assets, profitability and growth rate of enterprises as well as recommend measures to cope with shocks in variations of bank interest rates.
KEY DETERMINANTS OF THE INTENTION TO USE INTERNET BANKING IN VIETNAM
Authors: Khuu Van Hong , Nguyen Trang Thi Mai
Published: March 2020

This study investigates some key determinants of the intention to use internet banking in Vietnam. The research model was developed based on the Unified Theory of Acceptance and Use of Technology (UTAUT). The model was tested by a sample of 264 non users of internet banking in HCM city. The results show that performance expectancy, social influence, perceived credibility and anxiety significantly impact customers’ intention to adopt internet banking. In addition, results also show that effort expectancy and self-efficacy do not affect the intention to use internet banking.
SERVICE CONVENIENCE AND CUSTOMER SATISFACTION - A STUDY IN DOMESTIC AIRLINE SERVICE
Authors: Tran Thao Thi Phuong , Pham Thuy Ngoc
Published: March 2020

This study departs from the traditional approach to service customer satisfaction by introducing the concept of service convenience which emphasizes the engagement of customers in the process of buying and using the service. The analysis of data surveyed from 265 airline passengers shows that all five components of service convenience have positive impacts on customer satisfaction.
ANTECEDENTS AND OUTCOMES OF FASHION CLOTHING INVOLVEMENT
Authors: Huynh Tam Do Cong , Nguyen Trang Thi Mai
Published: March 2020

This study examines the antecedents and consequences of fashion clothing involvement. Data were gathered via a self-completed questionnaire with a sample size of 193 nontraditional students (working adults who attend college classes in the evenings) in three universities in HCM city. The results indicate that fashion clothing involvement is significantly effected by sign-value and hedonic-value. Further, it was found that fashion clothing involvement influences fashion clothing knowledge and fashion opinion leadership.
DEVELOPING HIGH QUALITY MANPOWER IN HOCHIMINH CITY
Authors: Nguyen Dzung Tien , Nguyen Hang Phan Thu
Published: March 2020

To strengthen its potential and advantages, Ho Chi Minh City (HCMC) has been oriented towards becoming an economic center with high value-added, prioritizing the development of service as well as industries which are characterized by science and high technology, cleaning industry, energy saving, good labor efficiency and high values, etc. To meet the requirements, HCMC pays special attention to the development of high quality human resources and the enhancement of manpower quality, which are defined to be one of the breakthrough programs in the period of 2011 – 2015. The paper shows systematic findings about characters and criteria of highly qualified manpower, requirements and solutions to the development of high quality manpower and the enhancement of manpower quality in the process of industrialization and modernization in our country, especially for HCMC, a city with the biggest human resources in the country, well-qualified technological and scientific teams (accounting for up to 30% of the whole country), but it is facing a serious shortage of specialized human resources in most fields. In the short run, HCMC needs to concentrate on rapidly building up high-quality manpower to meet the needs of construction, development and integration into international economy, especially to focus on manpower for industries which are characterized by their high value-added and technology in order to ensure the need of highly qualified labor for key services and industries, and to improve the training quality to meet the requirements of domestic labor and high-quality labor export.
PREPARATION OF VANADIUM PHOSPHORUS OXIDE CATALYST BY USING MICROWAVE IRRADIATION AND THEIR APPLICATION TO HYDROCARBON COMBUSTION
Authors: Co Thien Thanh , Nguyen Kien Trung , Ho Vu Pham Anh
Published: March 2020

Vanadium phosphorus oxide catalysts were prepared by conventional and microwave irradiation method. Both methods generated high yield (> 90%). Nevertheless, VPO catalysts prepared via microwave irradiation method appears to have different surface morphology from that of the catalysts prepared by conventional method. All the catalysts show excellent activities on hydrocarbon combustion reaction (up to 100%).
PEDAGOGICAL DOMAIN KNOWLEDGE FOR E-LEARNING
Authors: Le Long Duc , Nguyen Thuc Dinh , Nguyen Te An , Tran Hao Van , Hunger Axel
Published: March 2020

In e-Learning, the face-to-face communication between instructors and learners are more limited than in traditional learning form. This causes difficulties for the teaching and learning process. Besides, the developing learning materials in the conventional way are also becoming less and less effective to learners. Therefore, building the productive learning contents is one of the main problems for e-Learning systems. In this paper, we deal with the development of learning contents and propose a mathematical model as pedagogical domain knowledge for e-Learning, called Knowledge Graph. Based on pedagogical and teaching analyses, Knowledge Graph is able to ensure logical and complete qualities for necessary standard knowledge of a given curriculum. Especially, the model is useful for undergraduate education in the developing countries such as Vietnam, where the training context needs strong content knowledge, and good procedures for the building of training programs and curricula. It can help educational administrators, pedagogical experts, and instructors to design high quality teaching and learning materials .
PRELIMINARILY CHLOROPLAST TRANSFORMATION OF TOBACCO VARIETY V2 BY BOMBARDMENT
Authors: Phan Loc Tuong , Nguyen Ho Huu , Nguyen Thanh Thi
Published: March 2020

V2 is a high yield, large tobacco variety which is cultivated in many material areas of Vietnam. For successful chloroplast transformation, an efficient shoot regeneration system was required. Highest frequent regeneration was obtained when culturing V2 leaf discs on the basis medium supplemented NAA 0.1 mg/l and BA 1mg/l. Besides, the key factor in determining transgenic plants is consistently selective pressure. V2 variety of tobacco was sensitive to the antibiotics spectinomycin and streptomycin. At the concentration of 80 mg/l, spectinomycin inhibited completely shoot regeneration and plant growth. With streptomycin, the threshold is 125 mg/l. HIV-1 p24 and aadA genes were transferred to chloroplasts of the tobacco V2 variety by bombardment. Putatively transgenic plants were capable of resisting to streptomycin and spectinomycin up to 500 mg/l concentration. Through initial PCR testing, HIV-1 p24 was assumed present in the genome of the transgenics with the specific amplification band of 700 bp.
DETERMINATION OF CONTENT OF SOME ELEMENTS IN THE HUMAN BLOOD BY METHOD OF INSTRUMENTAL NEUTRON ACTIVATION ANALYSIS USING DALAT NUCLEAR REACTOR
Authors: Nguyen Hung Van
Published: March 2020

Neutron activation analysis using nuclear reactor has been used widely to determine of content of elements in environment, biology, geology, archaeology, etc. In this report, determination of content of some elements in the human blood by method of instrumental neutron activation analysis using Dalat nuclear reactor coupled with processing of results by k-zero method (using k0-Dalat code) and by relative one (using standard samples) is presented. 50 samples of the human blood are mainly collected from public objects in Lamdong province. They are prepared and activated together with the standard samples at the dry channel No. 7-1 and the rotary specimen rack (wet channel) of the reactor. Then they are directly measured by the HPGe gamma spectrometer and the measured data are processed. The experimental results for determination of ranges of contents and average values for 8 elements respectively are Na (1.06 - 2,48; 1.71 ± 0.30 mg/ml), Cl (1.10 - 3.75; 2.66 ± 0.71 mg/ml), Fe (0.26 - 0.72; 0.49 ± 0.09 mg/ml), K (0.31 - 1.14; 0.73 ± 0.15 mg/ml), Zn (4.55 - 13.97; 8.08 ± 1.24 μg/ml), Rb (2.73 - 7.92; 5.11 ± 0.86 μg/ml), Se (0.04 - 0.18; 0.08 ± 0.03 μg/ml) and Sc (0.22 – 1.61; 0.56 ± 0.24 ng/ml). Besides, content of sodium to be determined by the k-zero method and the relative one are compared also. The results for determination of contents of 8 elements in the human samples to be compared with those of other authers are shown that this method has had confidence, and it could be applied routinely in determination of contents of multi-elements.
NIKEN-NANO CeO2 COMPOSITE PLATING FOR CATALYTIC BOX USED TO TREAT ENGINE EXHAUST GAS
Authors: Nguyen Hung Duc , Dao Du Khanh , Pham Diep Xuan
Published: March 2020

Engine exhaust gases can be treated by the catalyst box made of CeO2 coated ceramic. In this study, Ni-CeO2 particles composite were coated on the working surface of the catalyst box by electroplating. Cesi dioxide was crushed in the mortar and ceramic ball for 48 h. The nanomicro size of the particles was confirmed by TEM and particle size distribution analysis. Ni-CeO2 composite coating was obtained by electroplating of Watt nickel solution with the addition of 4-8 g/l CeO2 at cathode current density of 1-2 A/dm2 and temperature of 40-50 oC. EDX analysis show that the CeO2 content in the coating is about 6%, which is equivalent to the content of CeO2 in the conventinal products.
OPTIMIZATION OF FUEL RELOADING PATTERNS FOR A RESEARCH REACTOR BY SIMULATED ANNEALING
Authors: Do Binh Quang
Published: March 2020

This article presents results obtained from a research into an application of simulated annealing method to the in-core fuel reloading pattern optimization for a research reactor. The decision variable of the optimization problem is a fuel reloading pattern for the next cycle after the present cycle finishes. The objective function maximizes the effective multiplication factor keff at the beginning of cycle while it is established to include an important safety paramater – the power peaking factor, in search process. A procedure for searching the optimal solutions was formed and a computer code was developed in the Fortran language running on PCs. Nuclear safety parameters for the optimization problem are provided from the results of the multigroup neutron diffusion theory computation program CITATION. A sample calculation was performed to find the optimal fuel reloading patterns for the second cycle of the Dalat research reactor and the results are presented in this article.
STUDY ON CREATING PROTECTOR Zn BY SEMI-LIQUID PRESSURE METHOD
Authors: Bui Xuan Ba , Nguyen Du Hong
Published: March 2020

Results of Zn based anode production by semi-liquid pressure method have been presented. Microstructure, electrochemical characteristics and protective effectiveness of the newly developed anodes have been demonstrated in relation with products manufactured by traditional method. The newly developed samples had a potential of -1.1462 V and corrosion rate of 0.27 mpy in comparison of -1.223 V and 0.4894 mpy for traditionally prepared anodes.
FROM ETHNOLOGY TO ANTHROPOLOGY APPROACH FROM RESEARCH METHODS
Authors: Ngo Le Van
Published: March 2020

In recent years, higher education in Vietnam has undergone a lot of changes in such various aspects as the formation of multidisciplinary, multi-field universities; of training forms etc. Especially, a lot of majors originating from advanced capitalist countries have been developed into training courses in Vietnamese universities, e.g. politics, international relations, religious studies, anthropology etc. The formation of institutions offering training courses on anthropology has broken the traditional structure of the organizing of training courses in the fields of ethnology and history in Vietnam higher education institutions. The paper does not aim at discussing the similarities nor differences between Ethnology and Anthropology, but focuses on the necessities to transform from Ethnology to Anthropology in every aspect from objectives, approach to methods, objects, research scope etc.
SOME URGENT ISSUES DURING THE INDUSTRIALIZATION AND ODERNIZATION PROCESS OF THE KHMER ETHNIC GROUPS AT THE MEKONG DELTA OF VIETNAM
Authors: Vo Sen Van , Tran Tien Nam
Published: March 2020

Khmer is an ethnic group among the community of 54 Vietnamese ethnic groups coexisting in Vietnam which mainly appears in the Mekong Delta. Since 1975, together with many major initiatives of the country under the leading role of the Vietnam Communist Party and different levels of government, Khmer ethnic has promoted the traditions of great effort to overcome difficulties, obtained the successes in many fields, and greatly contributed to the Doi moi career of the country. Despite the great changes in terms of manufacturing as well as living standard, the Khmer ethnic is still facing some urgent issues during the process of modernization and industrialization. The article will focus on examining three current urgent issues of the Khmer ethnic in the Mekong Delta include: agricultural land, poverty, and the relationship with other ethnic groups. The solutions for these issues will also be suggested as the outcome of examining process of the article.
MARINE FACTORS OF VIETNAMESE CULTURE IN SOUTHEAST ASIAN WATERS
Authors: Tran Luong Thi Thu
Published: March 2020

In Vietnamese culture, apart from the fact that water rice fields play the foundation role, marine element should be attached great importance to. In this light, the paper focuses on the analyzing and justifying the significance of marine element in Vietnamese traditional culture. The paper also emphasizes that Vietnam, with its current powerful potentials from the sea, needs to be deeply aware of marine element in its culture so as to rapidly integrate into marine economic network of Southeast Asia and of the world.
ACCULTURATION AT MULTIETHNIC COMMUNITIES (VIET, KHMER, CHINESE) AT BINH AN COMMUNE, KIEN LUONG RURAL DISTRICT, KIEN GIANG PROVINCE
Authors: Huynh Thu Ngoc
Published: March 2020

Acculturation is a concept that was introduced by Western anthropologists around the late 19th and early 20th century, focusing on cultural changes of ethnic peoples in multiethnic communities. It is the mutual relationship between two cultures. The mutuality sometimes is asymmetrical, which results in one culture being absorbed into, or in some cases being changed by the other; or the two being altered at the same time. Binh An commune, Kien Luong rural district, Kien Giang province is a long time resettlement of three ethnic peoples – the Viet, the Chinese and the Khmer which leads to inevitable acculturation among the peoples. The result is that there are some cultural features of each of the peoples having become common traits of the entire community while there are characters which reveal the changes in the cultures or converges in the community’s cultural practices.
MAIN STREAMS OF LE QUY DON'S THOUGHT ABOUT ONTOLOGY AND EPISTEMOLOGY
Authors: Nguyen Nghia Trong
Published: March 2020

Le Quy Don was a great talent in the history of Vietnamese ideology in feudal times. Many philosophical initiatives embodied in his works that he left behind has received much admiration. The main streams of ontological and epistemological thoughts is the thought of “Thai Cuc being one” - to be and not to be are two properties, two states of Thai Cuc. "Thai cuc being the first mixed gas", which is Le Quy Don's specific and original concept of "unique cosmology", is a core concept in his theory of Li Khi. To Le Quy Don, cognition of subjects is to cognize reasons, it means to make cognizance over its rules and natures, in order to find out internally hidden existence within the subjects. He appreciated the combination of “reasons” and “positions”, and human roles in social activities, etc.. Although Le Quy Don philosophical thought has not really broken out of dualism, idealism, mysticism, etc., his knowledges in philosophical field has been cultural works of significant value.
SUICIDE AS A DEVIANT BEHAVIOR – EMILE DURKHEIM’S VIEWPOINT ABOUT NORMLESSNESS
Authors: Truong Vy Van
Published: March 2020

Suicide is the problem, which is reaserched under the lots of viewpoints as biological, medical, psychological, sociological, ets. Emile Durkheim was a famous French sociologist. He had written the very famous of the world scientifical book in French “Le Suicide”, that is said about the negative phenomenon of self-killers. In the content of the book E. Durkheim had pointed out that suicide is a deviant behavior. He had called it the “anomie” (means “normlessness”).
STATE ADMINISTRATION’S DOCUMENTS HIGHLY RELIABLE AND ACCURATE HISTORIC MATERIAL SOURCES
Authors: Do Hoc Van
Published: March 2020

Based on the shown concept of the state administration’s documents, and by means of the brief view over the system of state administration’s documents through the historic periods in Vietnam such as: the feudality era, the French colonialist period, and from the August Revolution of 1945 till now..., the author made a state administration’s documents analysis if drafted and issued in complying with their basic characteristics as: - Documents stipulated under the name of the agencies, of organization, or of organization or agency ’s head, individual issue non concerning ; - Revealing the unilateral rights documents, with the power - submission relation expression; - The documents stipulated in regulated and unified forms, processing and presentation, as decided by the authorizing state agency. From these observations the author would like to determine the special outstanding value of state administration’s documents as material sources in historic study, under their archive form. Beside their characteristics as the holding of information from the past and as remaining archives - the state administration‘s documents are still highly reliable and accurate. As at the publishing, they are linked with the functions, the duties, the rights of the agency; linked with the authority; linked with the process and order of the publishing; with the unified form, presentation and layout as regulated by the state authorizing agency.
DEFORMATION ABILITY OF SINGLE POINT INCREMENTAL FORMING FOR THEMO-PLASTIC COMPOSITE MATERIALS
Authors: Pham Trung Van , Vo Cuong Van , Le Dien Khanh , Nguyen Nang Van , Phan Tuan Dinh , Nguyen Nam Thanh
Published: March 2020

The studies of theory and simulation for composite materials have not yet built model for analyzing the effects of temperature’s influence on the deformation ability of these materials. The article focused on studying the relationship between temperatures and deformation ability of composite sheets in SPIF method, building and analyzing simulation model, determining the limited deformation angle according to the temperatures and building the chart of limited forming for the polypropylene (PP) glass fiber type E mat composite material.
APPLYING THE ISF TECHNOLOGY TO PRODUCE THE CAR PART MODELS
Authors: Phan Tuan Dinh , Nguyen Binh Thien , Le Dien Khanh , Pham Phuong Hoang
Published: March 2020

The paper presents an application the research results previously done by group on the influence of technological parameters to the deformation angle and finish surface quality in order to choose technology parameters for the incremental sheet forming (ISF) process to produce products for the purpose of rapid prototyping or single-batch production, including all steps from design and process 3D CAD model, calculate and select the technological parameters, setting up manufacturing and the stage of post-processing. The samples formed successfully showed high applicability of this technology to practical work, the complex products with the real size can be produced in industries: automotive, motorcycle, civil...
MECHANICAL PROPERTIES OF THE VIET NAM SISAL FIBRE REINFORCED POLYPROPYLENE COMPOSITE
Authors: Nguyen Nieu Huu , Phan Binh Thanh , Huynh Sau
Published: March 2020

The static mechanical and dynamic mechanical properties of the treated sisal fiber reinforced polypropylene composites were improved by adding the compatiblizer PPgMA (polypropylene-grafted-maleic anghydride). The mechanical properties of the composites have been evaluated. By increasing PPgMA dosages from 2% and 3.5% by weight of PP matrix; the impact strength of the composites were significantly improved by 27% and 38%; the elongation increased by 21% and 36%; the tensile strength increased by 35% and 95%; the elastic modulus increased by 21% and 94% and the flexural modulus increased by 2% and 83% respectively. The dynamic mechanical properties (the storage modulus E’, the loss modulus E” and the loss factor tanδ) have been investigated in relation to the compatibility between the PP matrix and the treated sisal fibers. E’ and E” increased by increasing dosage of PPgMA and Tg decreased a little when increasing the contents of PPgMA. At higher temperatures, tanδ increased and at lower temperature tanδ decreased when increasing dosage of PPgMA. It is shown that PP/treated sisal fibers/PPgMA composites have shown the effects of cohesion when increasing the PPgMA. The fiber dispersion was studied by the transmission optical microscope (TOM). The morphology of the composites samples fractured by the impact strength tests have been studied using scanning electronic microscopy (SEM). The results show the improvement of the interaction forces between treated sisal fibers and PP matrix at higher levels of PPgMA.
DYNAMIC PROFILE REPRESENTATION AND MATCHING IN DISTRIBUTED SCIENTIFIC NETWORKS
Authors: Pham Vu Tran
Published: March 2020

Finding people having similar interests in online community is an interesting but challenging problem. Especially, in distributed multidisciplinary research network, locating scientists who share common interests to collaborate and solve large scientific problems is becoming more important. This paper introduces a method for extracting and modeling scientists’ interest profiles from their day-to-day interactions and a method for semantically matching interest profiles based on latent semantic analysis. These methods exclude the necessity of having ontology for semantic matching of profiles, while still maintain the ability to reason about the semantic meaning of words.
CPM: CUCKOO-BASED PATTERN MATCHING APPLIED FOR NIDS
Authors: Tran Thinh Ngoc
Published: March 2020

This paper describes the Cuckoo-based Pattern Matching (CPM) engine which based on a recently developed hashing algorithm called Cuckoo Hashing. We implemented the improved parallel Cuckoo Hashing suitable for hardware-based multi-pattern matching with arbitrary length. CPM is scalable with multi-character per clock cycle to sustain higher throughput rates with lower hardware resources. With the power of massively parallel processing, the speedup of CPM is up to 128X as compared with serial Cuckoo implementation. Compared to other hardware systems, CPM is far better in performance and save 30% of the area compared with the best system.
AN OVERVIEW OF SIMILARITY SEARCH IN TIME SERIES DATA
Authors: Duong Anh Tuan
Published: March 2020

Time series data occur in many real life applications, ranging from science and engineering to business. In many of these applications, searching through large time series database based on query sequence is often desirable. Such similarity-based retrieval is also the basic subroutine in several advanced time series data mining tasks such as clustering, classification, finding motifs, detecting anomaly patterns, rule discovery and visualization. Although several different approaches have been developed, most are based on the common premise of dimensionality reduction and spatial access methods. This survey gives an overview of recent research and shows how the methods fit into a general framework of feature extraction.
THE PILOT MODEL OF CAPACITY OF SUPPLEMENT FOR GROUNDWATER BY RAINFALL RESOURCE IN DORMITORY AREA OF VNU-HCM
Authors: Nguyen Ky Viet , Nguyen Tu Dinh
Published: March 2020

This paper reveals the capacity of supplement for groundwater by rainfall resource based on the monitoring and analyzing result of rainfall, evaporate, groundwater table of central-collecting well and monitoring wells as well as the geophysical test result in dormitory area of VNU-HCM from November 2007 to February 2009.