scholarly journals Nghiên cứu đặc điểm ống tiêu hóa và hệ số béo của cá bống cát tối Glossogobius aureus Akihito & Meguro, 1975

2021 ◽  
Vol 57 (Environment and Climate change) ◽  
pp. 184-190
Author(s):  
Minh Quang Đinh ◽  
Hoàn Giẻo Phan ◽  
Trọng Ngôn Trương ◽  
Sỹ Nam Trần ◽  
Hữu Đức Tôn Nguyễn
Keyword(s):  
Hoa Binh

Bài báo này bổ sung thông tin về đặc điểm hình thái của ống tiêu hoá và sự biến thiên của hệ số béo Clark ở loài cá bống cát tối Glossogobius aureus. Nghiên cứu được thực hiện trong 12 tháng (từ tháng 01 đến tháng 12 năm 2020) tại bốn địa điểm gồm: Cái Răng, Thành phố Cần Thơ (CRCT); Long Phú, tỉnh Sóc Trăng (LPST); Hòa Bình, tỉnh Bạc Liêu (HBBL) và Đầm Dơi, tỉnh Cà Mau (DDCM). Trong tổng số 742 cá thể thu được bằng lưới đáy có 382 cá đực và 360 cá cái, tất cả đều được dùng để xác định đặc điểm ống tiêu hoá và hệ số béo Clark của loài cá này. Kết quả cho thấy miệng cá có cấu trúc hướng lên, trên hàm có hai hàng răng xếp không đều, chiều dài ruột ngắn, cho thấy loài Glossogobius aureus thuộc nhóm cá ăn động vật. Loài cá này có cỡ miệng biến động theo giới tính và nhóm chiều dài có ý nghĩa thống kê ở mức 5%. Hệ số béo Clark của loài cá này thay đổi giữa giới tính, nhóm chiều dài và mùa vụ nhưng không ý nghĩa thống kê ở mức 5%, nhưng thay đổi ý nghĩa thống kê ở mức 5% theo địa điểm. Môi trường ở CRCT và DDCM có thể thuận lợi về nguồn thức ăn cho loài cá này vi hệ số béo Clark ở hai địa điểm này cao hơn so với HBBL và LPST. Ngoài ra, hệ số béo Clark còn bị ảnh hưởng bởi sự tương tác giới tính ´ địa điểm, mùa vụ ´ địa điểm. Kết quả nghiên cứu đã góp phần cung cấp thêm thông tin dẫn liệu về đặc điểm dinh dưỡng của loài...

Asymmetric information among stakeholders and consequences in vocational training for ethnic minority youth in Hoa Binh province

2019 ◽  
Vol 5 (5) ◽  
pp. 619-631
Keyword(s):  
Ethnic Minority ◽  
Vocational Training ◽  
Minority Youth ◽  
Ethnic Minority Youth ◽  
Specific Population ◽  
State Management ◽  
Principal Agent Problem ◽  
Training Institutions ◽  
The Government ◽  
Hoa Binh

The government supports vocational training in order to improve social security for specific population groups, such as the ethnic minority youth. However, there exists information asymmetry among the stakeholders in vocational training, including the ethnic minority youth, local authorities, training institutions, enterprises and state management agencies, leading to adverse selection, moral hazard and principal-agent problem. These problems have negatively impacted the effectiveness of vocational training for ethnic minority youth. Received 19th September 2019; Revised 20th October 2019; Accepted 24th October 2019

Establishment of the ecological environmental map for Hoa binh town based on the study of ecological landscape and ecological environment

2018 ◽  
Vol 25 (2) ◽  
pp. 185-189
Author(s):  
Nguyễn Thế Thôn
Keyword(s):  
Ecological Environment ◽  
The Matrix ◽  
Ecological Landscape ◽  
Environmental Map ◽  
Hoa Binh

Based on the ecolandscape theory and using the Map Info software, the author has established the ecological environmental map for Hoa Binhtown. In this map all of natural environmental components, poilution, degradation, catastrophe and break-down of environment are described.Annotation of the map have two parts : 1) the ecolandscape (ecological environment of the territory) is described with matrix ; 2) the pollution,degradation, catastrophe and break-down of environment are described with description table and that is under the matrix.

Spatial Prediction of Landslides Along National Highway-6, Hoa Binh Province, Vietnam Using Novel Hybrid Models

2021 ◽  
pp. 1-22
Author(s):  
Ha Thi Hang ◽  
Hoang Tung ◽  
Pham Duy Hoa ◽  
Nguyen Viet Phuong ◽  
Tran Van Phong ◽  
...  
Keyword(s):  
Spatial Prediction ◽  
Hybrid Models ◽  
National Highway ◽  
Hoa Binh

scholarly journals Biological and ecological characteristics of Rhus tree - Toxicodendron succecdanea (L.) Kuntze planted in Da Bac district, Hoa Binh province

2017 ◽  
Vol 33 (1S) ◽  
Author(s):  
Nguyen Phuong Giang ◽  
Doan Huong Mai ◽  
Do Thi Xuyen
Keyword(s):  
Total Phosphorus ◽  
The Body ◽  
Industrial Plant ◽  
Microstructure Characteristics ◽  
Ecological Characteristics ◽  
Total Potassium ◽  
Hoa Binh

Rhus tree - Toxicodendron succecdanea (L.) Kuntze is an industrial plant that provides precious and unique plastics in Vietnam. Rhus tree was originally planted in Phu Tho province, but so far many areas have been experimenting with Son and Da Bac (Hoa Binh) as one of the pilot sites for planting rhus tree. This study described the morphology and microstructure characteristics of Son trees grown in Cao Son commune, Hao Ly district, Da Bac district, Hoa Binh province. Especially latex tubes are present in both the body, roots and leaves, the number of tubes are many, usually forming the ring around the trunk and roots, the size of the tube large latex. Besides, the Ph of soil in Cao Son ranges from 3.71 to 4.32; In Hao Li from 3.68 to 3.98; Humus index in soil 0.47-3.98; N (%) is 0.08-0.25, Ca2 + is 0.25-2.5; Mg2 + is 0.5-2.38; Total phosphorus is 0.38-0.40; Phosphorus is readily digested at 43.43-59.06; Total potassium is 0.13 to 2.2. Land for growing mild soils or medium soils

Nghiên cứu quy trình chiết xuất và tinh chế Rotudin từ củ bình vôi (Stephania rotunda lour.) trồng tại tỉnh Hòa Bình

2020 ◽  
Vol 14 (1) ◽  
pp. 122-131
Author(s):  
Nguyễn Minh Hoàng ◽  
Tôn Nữ Yên Quỳnh
Keyword(s):  
Hoa Binh

Củ bình vôi (Stephania rotunda Lour.) trồng tại tỉnh Hòa Bình được sử dụng làm nguyên liệu để chiết xuất l-tetrahydropalmatine (tên hoạt chất thuốc là Rotundin) C21H25NO4 - một alkaloid có tác dụng an thần, gây ngủ, giảm mất trí nhớ. Mục đích của nghiên cứu là tìm ra một quy trình chiết xuất rotudin đơn giản, rẻ tiền, hiệu quả để có thể ứng dụng. Kết quả thu được cho thấy: - Phương pháp ngâm chiết với tỉ lệ 1/6 giữa bột khô củ bình vôi và thể tích dung dịch H2SO4 1% cho hiệu suất trích ly cao nhất 0,35%. Hợp chất thu được đạt độ tinh khiết 98% (trên HPLC). - Cấu trúc hóa học được xác nhận trên phổ NMR.

Knowledge and practice of handwashing with soap among mothers of children aged under 11 in some mountainous provinces in Vietnam, 2019

2021 ◽  
Vol 31 (4) ◽  
pp. 92-99
Author(s):  
Tran Quynh Anh ◽  
Le Thi Huong Ly ◽  
Nguyen Thi Lien Huong
Keyword(s):  
Associated Factors ◽  
Economic Status ◽  
Cross Sectional Study ◽  
Sectional Study ◽  
Cross Sectional ◽  
Childhood Illnesses ◽  
Diary Method ◽  
Knowledge And Practice ◽  
Handwashing With Soap ◽  
Hoa Binh

Handwashing with soap (HWWS) practice among mothers is critical in preventing childhood illnesses. This study aims to describe HWWS knowledge and practice among mothers of children aged under 11 and associated factors. This cross-sectional study was conducted on 319 mothers in 4 provinces in Vietnam, namely Dien Bien, Tuyen Quang, Hoa Binh, and Dak Lak, representing the region Northern Mountains and Central Highlands 2019. Knowledge of HWWS is measured through questionnaire interviews. HWWS practice is measured by the “Sticker Diary” method. Results show that while the proportion of mothers with knowledge on HWWS after defecation/toilet/using latrine is 84.6%, only 19.4% of mothers said that they need to HWWS after cleaning a child’s bottom/child’s feces, 17.6% before feeding children, and 39.2% HWWS before cooking/serving food. Less than 50% of mothers practice washing their hands with soap at critical times. The study shows a signifcant association between attributes such as educational level, occupation, economic status, and knowledge of HWWS. The study also fnds an association between the ethnic group, fnancial situation, knowledge, and practice HWWS among mothers of children under age 11.

scholarly journals Application of Long Short-Term Memory (LSTM) Neural Network for Flood Forecasting

Water ◽  
2019 ◽  
Vol 11 (7) ◽  
pp. 1387 ◽  
Author(s):  
Le ◽  
Ho ◽  
Lee ◽  
Jung
Keyword(s):  
Neural Network ◽  
River Basin ◽  
Input Data ◽  
Short Term Memory ◽  
Flood Forecasting ◽  
Data Sets ◽  
Short Term ◽  
Term Memory ◽  
Long Short Term Memory ◽  
Hoa Binh

Flood forecasting is an essential requirement in integrated water resource management. This paper suggests a Long Short-Term Memory (LSTM) neural network model for flood forecasting, where the daily discharge and rainfall were used as input data. Moreover, characteristics of the data sets which may influence the model performance were also of interest. As a result, the Da River basin in Vietnam was chosen and two different combinations of input data sets from before 1985 (when the Hoa Binh dam was built) were used for one-day, two-day, and three-day flowrate forecasting ahead at Hoa Binh Station. The predictive ability of the model is quite impressive: The Nash–Sutcliffe efficiency (NSE) reached 99%, 95%, and 87% corresponding to three forecasting cases, respectively. The findings of this study suggest a viable option for flood forecasting on the Da River in Vietnam, where the river basin stretches between many countries and downstream flows (Vietnam) may fluctuate suddenly due to flood discharge from upstream hydroelectric reservoirs.

scholarly journals Real-time optimisation of the Hoa Binh reservoir, Vietnam

2011 ◽  
Vol 42 (2-3) ◽  
pp. 217-228 ◽  
Author(s):  
Bertrand Richaud ◽  
Henrik Madsen ◽  
Dan Rosbjerg ◽  
Claus B. Pedersen ◽  
Long L. Ngo
Keyword(s):  
Real Time ◽  
Flood Control ◽  
Hydropower Generation ◽  
Operating Rules ◽  
Forecast Lead Time ◽  
Conflicting Objectives ◽  
Simulation Optimisation ◽  
On Line ◽  
Hoa Binh

Multi-purpose reservoirs often have to be managed according to conflicting objectives, which requires efficient tools for trading-off the objectives. This paper proposes a multi-objective simulation-optimisation approach that couples off-line rule curve optimisation with on-line real-time optimisation. First, the simulation-optimisation framework is applied for optimising reservoir operating rules. Secondly, real-time and forecast information is used for on-line optimisation that focuses on short-term goals, such as flood control or hydropower generation, without compromising the deviation of the long-term objectives from the optimised rule curves. The method is illustrated for optimisation of the Hoa Binh reservoir in Vietnam. The approach is proven efficient to trade-off conflicting objectives. Selected by a Pareto optimisation method, the preferred optimum is able to mitigate the floods in the downstream part of the Red River, and at the same time to increase hydropower generation and to save water for the dry season. The real-time optimisation procedure further improves the efficiency of the reservoir operation and enhances the flexibility for the decision-making. Finally, the quality of the forecast is addressed. The results illustrate the importance of a sufficient forecast lead time to start pre-releasing water in flood situations.

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