GROUNDWATER TREATMENT TECHNOLOGIES FOR THE NATIONAL PROGRAM "CLEAN WATER AND ENVIRONMENTAL SANITARY" OF HOCHIMINH CITY AND SOUTHERN PROVINCES

Joint Research on Environmental Science and Technology for the Eart

The Viet Nam National Innovation System: A Diagnostic Review

National Innovation Systems (NIS) plays a crucial role in countries’ efforts to catch up with technological advances which are critical for the long-term sustainable economic growth and development of countries. This paper provides a diagnostic review of the NIS in Viet Nam such that appropriate policies could be devised and im - plemented. This paper provides an analysis of the institutions, policies and linkages that characterize Viet Nam’s national innovation system. It focuses on the strengths and weaknesses of the nation’s system of innovation that Viet Nam has put in place in order to promote technological innovation for economic growth and development. The first part provides an overview of Viet Nam’s 20 years of economic reform as the context within which innovation takes place. The remainder offers a deeper insight into Viet Nam’s NIS, starting with the legal framework and institutions, including laws on science and technology, legislative government bodies and other supporting agencies. The current funding of R&D activities in general and in different sectors is given along with government’s attempts to encourage investment or financial support for R&D. The key actors in Viet Nam’s NIS are identified and investigated. The conclusion is a summary of rooms for improvement in Viet Nam’s NI

Study on structure of the Earth’s crust in Thua Thien-Hue province and adjacent areas by using gravity and magnetic data in combination

This paper presents the structural characteristics of the Earth’s crust in Thua Thien-Hue province and adjacent area based on interpretation of gravity and magnetic data in combination. Research results have shown that: The depth of crystalline basement varies complicatedly, in the range of 0–11 km. The depth of Conrad surface increases from Northeast (12 km) to Southwest (18 km) and the depth of Moho surface is 23–34 km; The density of sedimentary layer changes from 2.61 g/cm3 to 2.65 g/cm3. Meanwhile, the density of granitic layer is in the range of 2.68–2.73 g/cm3. The basaltic layer has the density value of 2.88–2.93 g/cm3 and the average density of lower layer of the Earth’s crust is about 3.30 g/cm3; The depth of second-order faults, Red River and A Luoi - Rao Quan, is through the Earth’s crust. Meanwhile, the depth of influence of third-order faults, Chay river, Dong Ha - Phu Vang, Vinh Linh, Hue - Son Tra and Tam Ky - Phuoc Son, is within the thickness of the Earth’s crust

A Tourists' Travel Intention in the Context of Covid-19 in Viet Nam

The novel coronavirus pneumonia has seriously affected the development of tourism in Vietnam and even the whole world. Combining the current of VietNam's mitigation and the gradual recovery of tourism, this paper puts the research perspective on tourists' travel intention, and constructs a new theoretical structure by using TPB and TRA theory, This study presents the findings of a research which examined the relationship Subject norms and perceived behavioral control have a significant impact on Attitude and tourists' desire to travel;  the Attitude and desire to travel has a significant positive impact on tourists' travel intention, a little empirical study investigates these relationships together. This article investigates these relationships using SEM with data 437 tourists in the Vietnam. Findings of the study revealed that Attitude mediates the relationship between Subject norms, Perceived Behavioral Control, and Travel intention. Desire to travel mediates the relationship between Subject Norm, Perceived Behavioral Control and Travel intention. Based on the study findings, implications for theory and practice are discussed. Keywords: COVID-19, Theory of planned behaviour(TPB), Theory of reasoned action(TRA),Viet Nam DOI: 10.7176/EJBM/13-14-07 Publication date:July 31st 202

Application of the cut-off projection to solve a backward heat conduction problem in a two-slab composite system

The main goal of this paper is applying the cut-off projection for solving one-dimensional backward heat conduction problem in a two-slab system with a perfect contact. In a constructive manner, we commence by demonstrating the Fourier-based solution that contains the drastic growth due to the high-frequency nature of the Fourier series. Such instability leads to the need of studying the projection method where the cut-off approach is derived consistently. In the theoretical framework, the first two objectives are to construct the regularized problem and prove its stability for each noise level. Our second interest is estimating the error in -norm. Another supplementary objective is computing the eigen-elements. All in all, this paper can be considered as a preliminary attempt to solve the heating/cooling of a two-slab composite system backward in time. Several numerical tests are provided to corroborate the qualitative analysis.Peer reviewe

Some preliminary results of paleo-tsunami study in the coastal region of the Nghe An province, Vietnam

In the coastal region of the Nghe An province, the geomorphology is characterized by appearances of fields of arca granosa with placura placenta and hills of placura placenta with arca granosa, namely: The hills of placura placenta with the arca granosa shells in the Quynh Van and Nghi Tien communes; the fields of arca granosa with the placura placenta: deep-seated in the Quynh Nghia, Dien Chau and along the Nghi Yen coast  which have age of 4,500 - 4,300 yrs.; The appearance of the placura placenta-arca granosa shell’s fields and hills which do not originate from either marine transgression in the Holocene epoch, tectonic movement or artificiality; Our results suggest that there were three tsunami events occurring in the past during the periods of 4,500 - 4,300; 4,100 - 3,900 and 900 - 600 yrs., respectively in the region

Modeling the determinants of job satisfaction in Vietnam

The study focuses on a number of policy-relevant variables such as wage policy and training plans for workers, as well as absolute and relative wages, union membership, and job position. Possible differences in job satisfaction of workers in domestic versus Foreign Direct Investment (FDI) firms are examined. The research utilizes a unique employer-employee matched survey conducted by the North-South Institute (Canada) to investigate the determinants of job satisfaction, and survey data from the Center of Analysis and Forecasting, the Vietnam Academy of Social Sciences