Skocz do pozycji: 1.

Tytuł:

Badania numeryczno-eksperymentalne efektu sprzężenia termomechanicznego : rozprawa doktorska

Autorzy:

Nguyen, Hong Phong.

Współwytwórcy:

Niezgoda, Tadeusz. Promotor
Pyrzanowski, Paweł. Recenzja
Małachowski, Jerzy. Recenzja

Data publikacji:

2016

Wydawca:

Warszawa : WAT

Tematy:

Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego (Warszawa) dysertacje naukowe
Mechanika
Mechanika budowli
Metody badawcze
Rozprawy doktorskie (2016)

Dostawca treści:

Bibliografia CBW

/5

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Skocz do pozycji: 2.

Tytuł:

Effective energy integral functionals for thin films with three dimensional bending moment in the Orlicz-Sobolev space setting

Autorzy:

Laskowski, Włodzimierz
Nguyen, Hong

Powiązania:

https://bibliotekanauki.pl/articles/729638.pdf

Data publikacji:

2016

Wydawca:

Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii

Tematy:

Γ-convergence
3D-2D dimension reduction
quasiconvex relaxation
minimizers of variational integral functionals
thin films
elastic membranes
effective energy integral functional
bulk and surface energy
equilibrium states of the film
non-power-growth-type bulk energy density
reflexive Orlicz and Orlicz-Sobolev spaces

Opis:

In this paper we consider an elastic thin film ω ⊂ ℝ² with the bending moment depending also on the third thickness variable. The effective energy functional defined on the Orlicz-Sobolev space over ω is described by Γ-convergence and 3D-2D dimension reduction techniques. Then we prove the existence of minimizers of the film energy functional. These results are proved in the case when the energy density function has the growth prescribed by an Orlicz convex function M. Here M is assumed to be non-power-growth-type and to satisfy the conditions Δ₂ and ∇₂.

Źródło:

Discussiones Mathematicae, Differential Inclusions, Control and Optimization; 2016, 36, 1; 7-31
1509-9407

Pojawia się w:

Discussiones Mathematicae, Differential Inclusions, Control and Optimization

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 3.

Tytuł:

Numerical Study on Effects of Airflow Parameters on the Air Temperature the at Mechanized Longwall of Mongduong Coal Mine

Autorzy:

Nguyen, Hong Thi
Nguyen, Quang Van

Powiązania:

https://bibliotekanauki.pl/articles/27323262.pdf

Data publikacji:

2023

Wydawca:

Polskie Towarzystwo Przeróbki Kopalin

Tematy:

numerical modelling
Ansys CFX
mechanized longwall
temperature of air mine
velocity of air mine
Mongduong coal mine
modelowanie numeryczne
temperatura
powietrze kopalniane
Wietnam

Opis:

The increasing depth of extraction and the degree of mechanization leading to the risk of workers working in poor microclimate conditions has become one of the major safety issues in coal mines. During the survey of the current microclimate in Mongduong coal mine, it showed that the temperature of the mechanized longwall exceeded the permissible regulations (t°≤ 30°C), the air humidity is about 95–100%. The reason for the increase of air temperature in longwall is due to geothermal, heat radiated from the longwall equipment and the inlet wind high temperature. To improve the thermal environment in the mechanized longwall area, Vietnam's coal mines open use ventilation, but the efficiency is not high. Therefore, the paper evaluated the influence of airflow on the temperature of the longwall, 7 models with different air flow velocities and 3 models with inlet air temperature have been created in ICM-CFD and simulated by Ansys CFX software. The environment temperature of each model was evaluated by analyzing the average temperature of the roadway section, the cross-section distribution of the roadway temperature and the velocity streamline of the whole roadway. As a result, the air flow rate increases leading to the air temperature in the longwall decreases, however the wind speed is limited. The inlet temperature of the gas stream is an important factor that affects the thermal environment in the longwall. The results of the article are the basis for making solutions to improve the thermal environment suitable for high-temperature longwall.

Źródło:

Inżynieria Mineralna; 2023, 2; 89--96
1640-4920

Pojawia się w:

Inżynieria Mineralna

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 4.

Tytuł:

Identifying the factors affecting the consumer behavior in switching to e-wallets in payment activities
Identyfikacja czynników wpływających na zachowania konsumentów przy przejściu na e-portfela w działalności płatniczej

Autorzy:

Nguyen, Hong Thu
Nguyen, Ngoc Tien

Powiązania:

https://bibliotekanauki.pl/articles/27315291.pdf

Data publikacji:

2022

Wydawca:

Politechnika Częstochowska

Tematy:

consumers
consumer behavior
e-wallets
payments
konsumenci
zachowania konsumenckie
e-portfele
płatności

Opis:

Cryptocurrency has been growing and gradually accepted in payment transactions. Therefore, e-wallets were created to meet the payment needs of consumers. Nevertheless, the factors affecting consumer behavior in switching to using e-wallets in payment need further investigation. This study aims to determine the factors affecting the consumer behavior of switching to e-wallets in payment activities in Vietnam. A typical survey was conducted on 150 consumers in the Southeast region of Vietnam, with the quantitative approach being applied to gather, process and scrutinize data. Quantitative research tools employed include descriptive statistics, Cronbach’s Alpha Analysis, exploratory factor analysis, and multivariable regression analysis with the support of SPSS 22.0. The research results show that five factors affect behavior toward switching to e-wallets in payment activities of the consumer, including (i) Consumer perception of the usefulness of switching to e-wallets, (ii) Consumer attitudes towards switching to e-wallets, (iii) Consumer perception of safety for e-wallets, (iv) Consumer perception of the ease of use of e-wallets and (v) Consumer behavior in readiness for the transition to e-wallets. Accordingly, research has suggested that payment service providers through e-wallets who want to attract consumers to use e-wallet services need to focus on the usefulness, safety, ease of use and convenience of e-wallet services. Once the issues of usefulness, safety and ease of use of e-wallet services are considered, consumers’ attitudes towards e-wallets will gradually change; thereby making the consumer behavior of using e-wallets more and more popular, increasing its frequency.
Kryptowaluta rośnie i stopniowo jest akceptowana w transakcjach płatniczych. Dlatego e-portfele powstały z myślą o potrzebach płatniczych konsumentów. Niemniej jednak czynniki wpływające na zachowanie konsumentów przy przechodzeniu na korzystanie z e-portfeli w płatnościach wymagają dalszych badań. Niniejsze badanie ma na celu określenie czynników wpływających na zachowania konsumentów związane z przechodzeniem na e-portfele w działaniach płatniczych w Wietnamie. Typowe badanie przeprowadzono na 150 konsumentach w południowo-wschodnim regionie Wietnamu, stosując podejście ilościowe do gromadzenia, przetwarzania i analizowania danych. Zastosowane ilościowe narzędzia badawcze obejmują statystyki opisowe, analizę alfa Cronbacha, eksploracyjną analizę czynnikową i wielowymiarową analizę regresji przy wsparciu SPSS 22.0. Wyniki badań pokazują, że pięć czynników wpływa na zachowanie konsumentów wobec przejścia na e-portfele w czynnościach płatniczych, w tym (i) postrzeganie przez konsumentów użyteczności przejścia na e-portfele, (ii) postawy konsumentów wobec przejścia na e-portfele, (iii) Postrzeganie przez konsumentów bezpieczeństwa portfeli elektronicznych, (iv) Postrzeganie przez konsumentów łatwości korzystania z portfeli elektronicznych oraz (v) Zachowanie konsumentów w gotowości do przejścia na portfele elektroniczne. W związku z tym badania sugerują, że dostawcy usług płatniczych za pośrednictwem e-portfeli, którzy chcą przyciągnąć konsumentów do korzystania z usług e-portfela, muszą skupić się na użyteczności, bezpieczeństwie, łatwości użytkowania i wygodzie usług e-portfela. Po rozważeniu kwestii użyteczności, bezpieczeństwa i łatwości korzystania z usług e-portfela, stosunek konsumentów do e-portfeli będzie się stopniowo zmieniał; tym samym spopularyzując zachowania konsumenckie związane z korzystaniem z e-portfeli, zwiększając jego częstotliwość.

Źródło:

Polish Journal of Management Studies; 2022, 25, 1; 292--311
2081-7452

Pojawia się w:

Polish Journal of Management Studies

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 5.

Tytuł:

Factors affecting urban people’s intention to use buses in Vietnam

Autorzy:

Thai, Nguyen Hong
Quan, Thach Minh

Powiązania:

https://bibliotekanauki.pl/articles/27314058.pdf

Data publikacji:

2023

Wydawca:

Politechnika Śląska. Wydawnictwo Politechniki Śląskiej

Tematy:

bus
influencing factors
intention to use buses
autobus
czynniki wpływające
zamiar korzystania z autobusów

Opis:

Despite strong development in Vietnam’s major cities, buses only contribute to city traffic. Bus services in Vietnamese towns do not yet meet passengers’ current needs and are not popular with passengers, especially in terms of time and convenience. This article analyzes the factors affecting urban people’s intention to use buses in Vietnam and, on that basis, makes recommendations to the authorities in cities to enhance the attractiveness of bus usage. Twenty-seven factors have been identified as affecting the need to travel by bus. The survey results show that there are still many barriers to attracting passengers using bus services in urban metropolitan areas. Therefore, urban governments in Vietnam need to adjust the current bus route network to suit the needs of the people, especially students, to increase its coverage.

Źródło:

Transport Problems; 2023, 18, 1; 89--101
1896-0596
2300-861X

Pojawia się w:

Transport Problems

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 6.

Tytuł:

Research on optimizing spray parameters for Cr3C2 – NiCr coating created on alloy steel by plasma spraying technique

Autorzy:

Dang, Thao Xuan
Son, Nguyen Hong
Cuong, Pham Duc

Powiązania:

https://bibliotekanauki.pl/articles/2171770.pdf

Data publikacji:

2022

Wydawca:

Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych

Tematy:

Cr3C2-NiCr
plasma spraying
coating
optimization
E355 alloy steel

Opis:

In this work, Cr3C2-NiCr ceramic coating with NiCr content of 30% was created on E355 (St 52-3)/1.0060 alloy steel substrate by air plasma thermal spraying (APS) method. The adhesion, tensile strength of the coating were studied in relation to spray parameters including current intensity, powder feed rate, and stand-off distance according to experimental planning. Experiments were designed based on Central Composite Design method. The adhesion and tensile strength of the coatings were measured by a tensile-compression machine. Analysis of variance (ANOVA) were used to build regression functions expressing the relationship between each property and spray parameters. The experimental results showed that those spray parameters significantly influence the properties of the coating. ANOVA results indicated that the spray parameters have different influences for each coating properties. In addition, regression model of the properties gives prediction results very close to experimental results. The optimization problem was solved in order to achieve the maximum value of adhesion and tensile strength of the coating. Values of the spray parameters for Cr3C2 – NiCr coating to achieve the above criteria have been determined and proposed in this study.

Źródło:

Journal of Machine Engineering; 2022, 22, 4; 43--53
1895-7595
2391-8071

Pojawia się w:

Journal of Machine Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 7.

Tytuł:

Hybrid variable neighborhood search for solving school bus-driver problem with resource constraints

Autorzy:

Ban, Ha-Bang
Nguyen, Hong-Phuong
Pham, Dang-Hai

Powiązania:

https://bibliotekanauki.pl/articles/27312916.pdf

Data publikacji:

2023

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH

Tematy:

SBDP-RC
metaheuristic
VNS

Opis:

The School Bus-Driver Problem with Resource Constraints (SBDP-RC) is an optimization problem with many practical applications. In the problem, the number of vehicles is prepared to pick a number of pupils, in which the total resource of all vehicles is less than a predefined value. The aim is to find a tour minimizing the sum of pupils’ waiting times. The problem is NP-hard in the general case. In many cases, reaching a feasible solution becomes an NP-hard problem. To solve the large-sized problem, a metaheuristic approach is a suitable approach. The first phase creates an initial solution by the construction heuristic based on Insertion Heuristic. After that, the post phase improves the solution by the General Variable Neighborhood Search (GVNS) with Random Neighborhood Search combined with Shaking Technique. The hybridization ensures the balance between exploitation and exploration. Therefore, the proposed algorithm can escape from local optimal solutions. The proposed metaheuristic algorithm is tested on a benchmark to show the efficiency of the algorithm. The results show that the algorithm receives good feasible solutions fast. Additionally, in many cases, better solutions can be found in comparison with the previous metaheuristic algorithms.

Źródło:

Computer Science; 2023, 24 (3); 297--325
1508-2806
2300-7036

Pojawia się w:

Computer Science

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 8.

Tytuł:

A Review of Customer Acceptance and Mobile Marketing
Przegląd akceptacji klientów i marketingu mobilnego

Autorzy:

Nguyen, Thi Hong Ngoc

Powiązania:

https://bibliotekanauki.pl/articles/1925922.pdf

Data publikacji:

2021-04

Wydawca:

Uniwersytet Warszawski. Wydawnictwo Naukowe Wydziału Zarządzania

Tematy:

mobile marketing
mobile customer behavior
mobile marketing research
customers’ acceptance
marketing mobilny
mobilne zachowania klientów
mobilne badania marketingowe
akceptacja klientów

Opis:

Purpose: This article aims to organize and classify research on consumer behavior in mobile marketing, namely customer acceptance. Methods/design: To facilitate the search and synthesis of studies, the first step in the approach is to build a classification model that will be used to synthesize articles and research proposals. In the second step, the author conducted a thorough review and analysis of the content of selected articles from 2014 to early 2019 and removed sections that were not related to consumer acceptance of mobile marketing. In the third step, after an accurate review, the relevant studies were identified. Seventy-eight publications were selected for detailed analysis. Results: Through classification and analysis, articles are divided into groups of topics: fields in mobile marketing, research models, research methods. The results provided a conceptual framework of mobile marketing materials that can assess the researcher’s level of attention for each sub-area. Research limitations: This study has certain limitations. The classified publications appeared only in a few journals found. Therefore, the synthesis may not cover all the research on consumer adaptation to mobile marketing. Extensive research is essential in the future. Originality/value: A results framework is analyzed and provided, summarizing the customer acceptance research process as regards mobile marketing. From there on, new research directions are established for the future.
Cel: uporządkowanie i scharakteryzowanie badań nad zachowaniami konsumentów w marketingu mobilnym, a mianowicie nad akceptacją klientów. Metodologia: aby ułatwić wyszukiwanie i syntezę badań, na pierwszym etapie zbudowano model klasyfikacyjny, który posłużył do syntezy artykułów i propozycji badawczych; na drugim – dokonano dokładnego przeglądu i analizy treści wybranych artykułów od 2014 do początku 2019 roku oraz usunięto sekcje niezwiązane z akceptacją marketingu mobilnego przez konsumentów. Na trzecim etapie, po dokładnym przeglądzie, zidentyfikowano odpowiednie badania. Do szczegółowej analizy wybrano siedemdziesiąt osiem publikacji. Wyniki: artykuły poprzez klasyfikację i analizę zostały podzielone na grupy tematyczne: obszary marketingu mobilnego, modele badawcze, metody badawcze. Wyniki dostarczyły ram koncepcyjnych dla mobilnych materiałów marketingowych, które mogą ocenić poziom uwagi badacza dla każdego podobszaru. Ograniczenia/implikacje badawcze: sklasyfikowane publikacje pojawiły się tylko w kilku znalezionych czasopismach. Dlatego synteza może nie obejmować wszystkich badań dotyczących adaptacji konsumentów do marketingu mobilnego. W przyszłości niezbędne są szeroko zakrojone badania. Oryginalność/wartość: przeanalizowano i dostarczono ramy wyników, które podsumowują proces badania akceptacji klienta w marketingu mobilnym oraz zapewnia ono nowe kierunki badań na przyszłość.

Źródło:

Problemy Zarządzania; 2021, 19, 1/2021 (91); 51-64
1644-9584

Pojawia się w:

Problemy Zarządzania

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 9.

Tytuł:

Seasonal and Tidal Influence on Surface Water Quality – A Case Study in the Hau River Segment, Vietnamese Mekong Delta Province

Autorzy:

Ni, Duong Van
Viet, Le Hoang
Ly, Nguyen Hong Thao

Powiązania:

https://bibliotekanauki.pl/articles/2173269.pdf

Data publikacji:

2022

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

surface water quality
Hau Giang
season
discriminant analysis
tide

Opis:

The study aimed to evaluate the influence of seasons and tides on surface water quality of Hau River in Hau Giang province, Vietnam. The water quality data were collected at six locations at low tide and high tide. The monitoring parameters included pH, dissolved oxygen (DO), biochemical oxygen demand (BOD), chemical oxygen demand (COD), total suspended solids (TSS), ammonium (NH4+-N), nitrate (NO3--N), orthophosphate (PO43--P), total phosphorus (TP), total nitrogen (TN), iron (Fe) and Coliform. One-way analysis of variance (One-way ANOVA), cluster analysis (CA) and discriminant analysis (DA) were applied to determine the influence of tides and seasons on water quality. The surface water quality was compared with the national technical regulation on surface water quality in column A1 (QCVN 08-MT:2015/BTNMT). The results showed that surface water in the study area had organic pollution and high eutrophication potential. The BOD, COD, TN, TP, Fe and coliform parameters in low tide tended to be higher than those in high tide. Five parameters, including TSS, TP, TN, PO43--P and coliform had a significant difference between the wet season and the dry season by DA analysis. Cluster analysis classified the water quality into three clusters, mainly by the BOD, COD, TSS, PO43--P and Fe parameters. The study provides important information on the water quality of the Hau River in the Hau Giang province for water uses and monitoring.

Źródło:

Journal of Ecological Engineering; 2022, 23, 8; 290--298
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 10.

Tytuł:

Protection of Female Workers rights in Employment and Incomes in Vietnam

Autorzy:

Nguyen, Thi Hong Loan
Pham, Thu Trang
Nguyen, Thi Ngoc Anh
Bui, Thi Thu Thuy
Nguyen, Hong Thai

Powiązania:

https://bibliotekanauki.pl/articles/2020248.pdf

Data publikacji:

2021

Wydawca:

Polskie Towarzystwo Przeróbki Kopalin

Tematy:

rights of female worker
employment and income
Labor Law
Covid-19 epidemic
praca kobiet
prawo pracy
Wietnam
Covid-19

Opis:

As an important task of the country's socio-economic development, protecting the rights of female workers in employment and income is concerned and implemented by international organizations and all countries in the world. The COVID-19 pandemic has been affecting the global economy and hurt the incomes and employment of many female workers. In Vietnam nowadays, there is an increase in the unemployment rate of female workers, gender inequality in employment and income, and the ability to secure their jobs and income. The article analyzes the current regulations and their implementation in the employment and income of Vietnamese female workers in the context of the COVID-19 pandemic. The article also proposes some recommendations on legal provisions related to training backup jobs, arranging and employing female employees, providing income support for female employees during leave due to the COVID-19 epidemic; and policies related to female workers and their employers. These recommendations will improve Vietnam's labor law on female workers’ rights in employment and income and enhance the efficiency of human resource use and socio-economic development.

Źródło:

Inżynieria Mineralna; 2021, 2; 505--512
1640-4920

Pojawia się w:

Inżynieria Mineralna

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 11.

Tytuł:

Research, Calculation and Proposal of Ventilation Solution for Duong Huy Coal Mine when Mining Down to -250 m Depth

Autorzy:

Dao, Van Chi
Le, Tien Dung
Vu, Thai Tien Dung
Nguyen, Hong Cuong

Powiązania:

https://bibliotekanauki.pl/articles/2020250.pdf

Data publikacji:

2021

Wydawca:

Polskie Towarzystwo Przeróbki Kopalin

Tematy:

main fan
working mode
ventilation
airflow
air pressure
air velocity
wentylacja
ciśnienie
powietrze

Opis:

At present, according to the extraction plan in the year 2020 of Duong Huy Coal Company - Vinacomin, the mining is divided into three main zones: Central Zone extracts 06 faces; South Zone extracts 2 faces and Northeast Zone extracts 2 faces. The designated total production of all zones is 1,880,000 tons/year. To ensure the production of each mining zone, exhaust fan stations are installed at ventilation roadway adits with a total of 05 main fan stations. However, in the near future, to ensure and maintain production activities, the mine is being planned and operated using 03 main fan stations. The calculation results for the reasonable working mode of fan stations are as follows: for fan station FBCDZ8-№32B at level +47 m, airflow is 167.69 m3 /s and air pressure is 243.74 mm H2O; for fan station 2K56- №30 level +40 m, airflow is 123.37 m3 /s and air pressure is 324.79 mm H2O; for fan station FBCDZ-8- №32B at level +44 m, airflow is 167.69 m3 /s and air pressure is 354.99 mm H2O.

Źródło:

Inżynieria Mineralna; 2021, 2; 513--520
1640-4920

Pojawia się w:

Inżynieria Mineralna

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 12.

Tytuł:

Impact of ownership concentration on the innovation of small and medium-sized enterprises
Wpływ koncentracji własności na innowacyjność małych i średnich przedsiębiorstw

Autorzy:

Oanh, Dao Le Kieu
Nguyen, Hong Thu
Linh, Nguyen Tran Xuan
Nhan, Do Thi Thanh

Powiązania:

https://bibliotekanauki.pl/articles/27315295.pdf

Data publikacji:

2022

Wydawca:

Politechnika Częstochowska

Tematy:

ownership concentration
innovation
SMEs
FDI
Bayes
koncentracja własności
innowacje
MŚP
BIZ

Opis:

The study was conducted to assess the impact of ownership concentration on the innovation of Small and Medium-sized Enterprises (SMEs) in Vietnam. Furthermore, innovation is seen as an important element in creating competitiveness to achieve long-term development for a company. This topic has been reported in many previous pieces of research where innovation is often measured through the number of patents. However, this study measures the innovation of SMEs through whether these businesses introduce products/services or introduce a new production process or new technology in 3 years. By Logit Bayes regression method, the research results show that ownership concentration harms the innovation of SMEs in Vietnam. The authors explain this result through channels like "access to capital" and the "Risk aversion" channels.
Badanie przeprowadzono w celu oceny wpływu koncentracji własności na innowacyjność małych i średnich przedsiębiorstw (MŚP) w Wietnamie. Ponadto innowacyjność postrzegana jest jako ważny element tworzenia konkurencyjności w celu osiągnięcia długoterminowego rozwoju firmy. Ten temat został poruszony w wielu poprzednich badaniach, w których innowacyjność jest często mierzona liczbą patentów. Jednak badanie to mierzy innowacyjność MŚP poprzez to, czy te firmy wprowadzają produkty/usługi lub wprowadzają nowy proces produkcyjny lub nową technologię w ciągu 3 lat. Wyniki badań metodą regresji Logit Bayes pokazują, że koncentracja własności szkodzi innowacyjności MŚP w Wietnamie. Autorzy wyjaśniają ten wynik kanałami, takimi jak „dostęp do kapitału” i „niechęć do ryzyka”.

Źródło:

Polish Journal of Management Studies; 2022, 25, 1; 312--326
2081-7452

Pojawia się w:

Polish Journal of Management Studies

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 13.

Tytuł:

AN EXPLORATORY STUDY OF ICT USE IN ENGLISH LANGUAGE LEARNING AMONG EFL UNIVERSITY STUDENTS

Autorzy:

Tri, Dang Hoang
Nguyen, Nhung Hong Thi

Powiązania:

https://bibliotekanauki.pl/articles/941305.pdf

Data publikacji:

2014

Wydawca:

Uniwersytet Marii Curie-Skłodowskiej w Lublinie. IATEFL Poland Computer Special Interest Group

Tematy:

ICT
EFL

Opis:

There has been a large volume of published studies describing the attitudes of teachers and students towards ICT usage to study English; nevertheless, limited research has been conducted to examine the use of ICT in terms of frequency of use, purposes, perceptions, and expectations among EFL students. Thus, the purpose of the current study was to address this research problem. The research used a convenience sample of 149 English major students who were invited to respond to the questionnaire survey. The findings indicated that the participants spent more time using ICT for private purposes than for English learning purposes. Most of them showed their positive attitudes towards ICT use to study English and expected that ICT should be used more frequently in the classroom in order to maximize language learning and teaching. Gaining an understanding of the way the learners employ ICT for their non-educational purposes may help “shed light on how best to determine their educational uses” (Fujimoto, 2012, p.165). Pedagogical implications were also given in this current inquiry.

Źródło:

Teaching English with Technology; 2014, 14, 4; 32-46
1642-1027

Pojawia się w:

Teaching English with Technology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 14.

Tytuł:

Effect of Power Quality on the Performance of Explosion-Proof Transformers in Mining in Vietnam

Autorzy:

Do, Nhu Y.
Ngo, Xuan Cuong
Nguyen, Thi Hong

Powiązania:

https://bibliotekanauki.pl/articles/25212166.pdf

Data publikacji:

2023

Wydawca:

Polskie Towarzystwo Przeróbki Kopalin

Tematy:

power quality
performance
explosion-proof transformer
fuzzy system
górnictwo
jakość energii
Wietnam

Opis:

When meeting customer demand, utility companies must consider power quality. Currently, the industrial power network in general and the underground mine power network in particular have long feeder lines, supplying power to many nonlinear loads and power electronic converters, which reduces power quality. Poor power quality can damage sensitive equipment and lead to costly repairs, leading to lost time, data corruption, and lower productivity. In this paper, a fuzzy system is developed to determine the power quality of the power network for different operating conditions and study its influence on the performance of the explosion-proof transformer in the underground mine power network in Vietnam. The simulations and calculations were performed on Matlab-Simulink software for a three-phase, 630-kVA, 6/1.2 kV explosion-proof transformer in power networks with variable power quality. A fuzzy system is developed with four measurable inputs, including frequency deviation, voltage unbalance factor, total harmonic distortion of supply voltage, total harmonic distortion of current, and an output variable, power quality. The simulation results show that the explosion-proof transformer's performance decreases when the power quality degrades, and the proposed fuzzy system can accurately diagnose this.

Źródło:

Inżynieria Mineralna; 2023, 2; 61--69
1640-4920

Pojawia się w:

Inżynieria Mineralna

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 15.

Tytuł:

Poly(L-lactic acid)/deproteinized natural rubber blends with enhanced compatibility
Mieszaniny poli(kwas L-mlekowy)/zdeprotonowany kauczuk naturalny o zwiększonej kompatybilności

Autorzy:

Mahendra, I Putu
Nghia, Phan Trung
Phuong, Nguyen Thi Hong
Hang, Tring Thi
Alias, Nur Fazreen
Ismail, Hanafi

Powiązania:

https://bibliotekanauki.pl/articles/1789434.pdf

Data publikacji:

2021

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej

Tematy:

compatibility
PLLA
DPNR
low molecular weight
natural rubber
grafting
kompatybilność
kauczuk naturalny o małym ciężarze cząsteczkowym
szczepienie

Opis:

PLLA-g-LMWNR (LMWNR – low molecular weight natural rubber) was used as a compatibilizer (1–3 wt %) of poly(L-lactic acid)/deproteinized natural rubber (PLLA/DPNR) blend (95/5 w/w). The LMWNR was prepared using TiO2/ZnO (9 : 1 w/w) and H2O2 as co-catalyst. The obtained LMWNR was grafted with 0–12 wt % maleic anhydride (LMWNR-g-MA) and then with PLLA (PLLA-g-LMWNR). A significant improvement in the mechanical properties of the PLLA/DPNR blend was found in the blend that contained 3 wt % PLLA-g-LMWNR. Scanning electron microscopy showed a decrease in the pore diameter from 5.44 to 1.56 μm. The thermal analysis of PLLA/DPNR blends showed that the Tg value of PLLA phase shifted from 63.1 to 61.4°C. These results confirmed that PLLA-g-LMWNR can enhance the compatibility of the PLLA/DPNR blend.
PLLA-g-LMWNR (LMWNR – kauczuk naturalny o małym ciężarze cząsteczkowym) stosowano jako kompatybilizator (1–3% mas.) mieszaniny PLLA/DPNR [poli(L-kwas mlekowy)/zdeprotonowany kauczuk naturalny] (95/5 w/w). LMWNR otrzymano z DPNR przy użyciu TiO2/ZnO (9 : 1 w/w) i H2O2 jako kokatalizatora, a następnie szczepiono bezwodnikiem maleinowym w ilości 0–12% mas. (LMWNR-g-MA). PLLA-g-LMWNR uzyskano w wyniku szczepienia PLLA z LMWNR-g-MA. Stwierdzono poprawę właściwości mechanicznych mieszaniny PLLA/DPNR zawierającej 3% mas. PLLA-g-LMWNR. Metodą SEM wykazano zmniejszenie średnicy porów z 5,44 do 1,56 μm. Wartość temperatury zeszklenia Tg fazy PLLA mieszaniny PLLA/DPNR, wyznaczona metodą analizy termicznej, zmniejszyła się z 63,1 do 61,4°C. Uzyskane wyniki potwierdziły, że dodatek PLLA-g-LMWNR zwiększa kompatybilność mieszaniny PLLA/DPNR.

Źródło:

Polimery; 2021, 66, 2; 105--111
0032-2725

Pojawia się w:

Polimery

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 16.

Tytuł:

Cellular internalization analysis of folatetargeted PLA-PEG filomicelles loaded with new betulin derivative

Autorzy:

Paduszyński, Piotr
Jelonek, Katarzyna
Kasperczyk, Janusz
Li, Suming
Nguyen, Thi Hong Nhung
Orchel, Janusz
Chodurek, Ewa
Jaworska-Kik, Marzena
Chrobak, Elwira
Bębenek, Ewa
Boryczka, Stanisław
Jarosz-Biej, Magdalena
Smolarczyk, Ryszard
Foryś, Aleksander

Powiązania:

https://bibliotekanauki.pl/articles/285051.pdf

Data publikacji:

2019

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów

Źródło:

Engineering of Biomaterials; 2019, 22, no.153; 67
1429-7248

Pojawia się w:

Engineering of Biomaterials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 17.

Tytuł:

Hemifacial asymmetries in age perception: the left cheek looks older for females, but not males

Autorzy:

Lindell, Annukka K
Cianchetta, Rhiannon O
Azim, Sana M
Freeman, Cody G
de Oliveira, Nicole C
Saban, Sakire
Messina, Julia L
Wilson, Kira Elise
Egan, Alanna
Caspar, Megan D
Grey, Emma J
McDonald, Bryce A
Croxford, Kylie N
Bui, Thu Trang
Aiello, Ashley A
Heywood-Smith, Victoria M
Kidd, Andrew J
Stanley, Shenae C
Wakeling, Alarna
Hoggan, Stephanie A.L
Morriss, Ashleigh S
Trinh, Thi Phuong Mai
Thai-Nguyen, Hong
Fonte, Melissa
Agolli, Franceska

Powiązania:

https://bibliotekanauki.pl/articles/2106020.pdf

Data publikacji:

2019-12-18

Wydawca:

Fundacja Edukacji Medycznej, Promocji Zdrowia, Sztuki i Kultury Ars Medica

Tematy:

emotion
asymmetry
hemisphere
laterality
age

Opis:

The left hemiface expresses emotion more intensely than the right. Because emotional expressions contract the facial muscles and wrinkle the skin, theoretically the left hemiface’s greater expressivity should prompt more pronounced expression lines and wrinkles on the left than right side of the face. As wrinkles are the most salient age cue, we investigated whether the left hemiface consequently appears older than the right. Two hundred and sixty participants (F=148; M=112) viewed booklets containing pairs of left-left and right-right chimeric faces of eight models (M=F). For each trial participants were asked to make a two alternative forced choice response indicating which image looked older. Results confirmed a left cheek bias, with participants more likely to select left-left than right-right chimeras. Whilst participant gender did not influence perceptions, model gender predicted cheek selections: responses to female models drive the overall left cheek bias. The left cheek (56.8%) appeared older than the right cheek (43.2%) for female models, whereas there was little difference in perceived age between male models' left (50.8%) and right (49.2%) cheeks. Given that youth influences perceptions of female beauty, these findings complement previous research and offer a potential explanation for why the left side of females’ faces are judged less attractive: the right cheek appears younger.

Źródło:

Acta Neuropsychologica; 2019, 17(4); 417-426
1730-7503
2084-4298

Pojawia się w:

Acta Neuropsychologica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 18.

Tytuł:

Genotype TNF-α(-308) and Silicosis on Factory Workers in Vietnam in 2020

Autorzy:

Nguyen, Viet
Nguyen, Thi Thu Huyen
Dao, Xuan Dat
Vu, Xuan Quy
Pham, Thi Quan
Le, Thi Kim Chung
Tran, Huy Thinh
Le, Thi Huong
Nguyen, Ngoc Anh
Nguyen, Viet Nhung
Nguyen, Ngoc Hong
Luong, Mai Anh
Le, Thi Thanh Xuan

Powiązania:

https://bibliotekanauki.pl/articles/2020235.pdf

Data publikacji:

2021

Wydawca:

Polskie Towarzystwo Przeróbki Kopalin

Tematy:

silicosis
genotype
TNF-α
Vietnam
Wietnam
genotyp

Opis:

The studFigy aims to determine the TNF-α single-nucleotide polymorphism TNF-α (-308) and assess the association of TNF-a(-308) SNP with the risk of silicosis among workers directly exposed to silica dust in Vietnam. A study was undertaken among 78 cases with silicosis and 103 controls without silicosis in Vietnam. Blood samples were collected for genomic DNA extraction from each subject. The phenotyping of TNF-α(-308) was performed using polymerase chain reaction‐based restriction fragment length polymorphism (PCR‐RFLP) and dye termination sequencing. Results: The average exposure time of the case group was slightly higher than that of the control group (12.46 ± 6.732 years vs. 12.09 ± 7.854 years). The majority of genotypes in both silicosis and non-silicosis was GG. When analyzing the concentration of TNF-α in the study participants' blood, it is shown that the average concentration of TNFα in the case group was higher than that in the control group. The genotype AG in the case group was 1.368 times higher than that in the control group. The percentage of all A alleles in the case group with silicosis was 1.342 times higher than the control group without the disease, similar to previous studies. Conclusion: The majority of genotypes in both groups was GG. The average concentration of TNF-α in blood, genotype AG, and the percentage of all A alleles in the case group was higher than that in the control group.

Źródło:

Inżynieria Mineralna; 2021, 2; 459--466
1640-4920

Pojawia się w:

Inżynieria Mineralna

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 19.

Tytuł:

Virtual MRTD – an indirect method to measure MRTD of thermal imagers using computer simulation

Autorzy:

Chrzanowski, Krzysztof
Hong Viet, Nguyen

Powiązania:

https://bibliotekanauki.pl/articles/1835813.pdf

Data publikacji:

2020

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

MRTD
minimum resolvable temperature difference
virtual MRTD
indirect method
computer simulation
thermal imager

Opis:

Minimum resolvable temperature difference (MRTD) is considered as the most important parameter of thermal imagers. A new method of MRTD measurement without drawbacks of other methods is presented in this paper. Proposed MRTD measurement method coded as virtual MRTD is based on a three steps measurement concept using semi-automatic objective measurements and computer simulation. First, objective parameters of the tested thermal imager are measured. Second, software simulates this tested thermal imager and generates the image of 4-bar target of specified spatial frequency (size) and contrast (temperature difference). Third, a human observer analyses the images of the 4-bar target generated by the software on the screen of PC set and measures MRTD of the simulated thermal imager at specified set of spatial frequencies. The proposed method offers higher measurement speed, lower cost and typically better accuracy in comparison with the typical MRTD measurement method.

Źródło:

Optica Applicata; 2020, 50, 4; 671-688
0078-5466
1899-7015

Pojawia się w:

Optica Applicata

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 20.

Tytuł:

The change of the ancestor worship belief in the Vietnamese family nowadays
Zmiana w wierze w kult przodków we współczesnej wietnamskiej rodzinie

Autorzy:

Thuy, Ta Thi
Hong, Nguyen Thi

Powiązania:

https://bibliotekanauki.pl/articles/442094.pdf

Data publikacji:

2017-06-30

Wydawca:

Towarzystwo Wiedzy Powszechnej w Szczecinie

Tematy:

ancestor worship
tradition
ethnic culture
kult przodków
tradycja
kultura etniczna

Opis:

The belief of ancestor worship is one of the ancient traditions of the Vietnamese which is present in almost every activity of ethnic culture. Through time, ancestor worship has still a lasting vitality in the Vietnamese mind and is respected by people although the current market economy has had an impact on this belief. Thus, we find the core values of the ancestor worship tradition in the family of Vietnam today that are still conserved by each person and each family.
Wiara w kult przodków to jedna ze starożytnych tradycji wietnamskich, wciąż obecna w niemal w każdym działaniu kultury etnicznej. Mimo upływu czasu kult przodków wciąż żyje w wietnamskich umysłach i jest przez ludzi respektowany, chociaż obecna gospodarka rynkowa miała na niego wpływ. Odnajdujemy zatem w wietnamskich rodach podstawowe wartości tradycji czczenia przodków, które są wciąż chronione przez każdą osobę i każdą rodzinę.

Źródło:

Edukacja Humanistyczna; 2017, 1; 145-152
1507-4943

Pojawia się w:

Edukacja Humanistyczna

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 21.

Tytuł:

An application of the Negative Malmquist model for Vietnamese garment and textiles industry

Autorzy:

Nguyen, Thi Kim Lien
Nguyen, Xuan-Huynh
Pham, Hong V.

Powiązania:

https://bibliotekanauki.pl/articles/2175875.pdf

Data publikacji:

2022

Wydawca:

STE GROUP

Tematy:

negative malmquist model
data envelopment analysis
garment and textile company
efficiency

Opis:

The study purpose is to measure the performance of the Vietnamese garment and textiles industry by means of the Negative Malmquist model using the data envelopment analysis (DEA) method. The empirical results presented the efficient, inefficient cases, and average efficiency for all garment and textile companies in Vietnam during from 2016 to 2020. The main findings determined that five companies, including HTG, TET, MSH, M10, and BDG possessed efficiency scores in whole terms. An overall picture of the garment and textiles industry in Vietnam is used to evaluate the operational process. The research recommends a feasible alternative method to deal with inefficient cases.

Źródło:

Management Systems in Production Engineering; 2022, 1 (30); 74--79
2299-0461

Pojawia się w:

Management Systems in Production Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 22.

Tytuł:

Phase Diagrams of the Excitonic Insulator State: Analyzing the Excitonic Susceptibility

Autorzy:

Do, Thi Hong Hai
Nguyen, Thi Hau

Powiązania:

https://bibliotekanauki.pl/articles/2019421.pdf

Data publikacji:

2021

Wydawca:

Polskie Towarzystwo Przeróbki Kopalin

Tematy:

unrestricted Hartree-Fock approximation
Falicov-Kimball model
excitonic insulator
excitonic susceptibility
rare-earth chalcogenide
izolatory
model Falicova-Kimballa
materiały rzadkie

Opis:

In this paper, the formation of the excitonic insulator state in the rare-earth chalcogenides has been investigated through the extended Falicov-Kimball model. Adapting the unrestricted Hartree-Fock approximation, we have derived a set of explicitly self-consistent equations determining expectation values and the excitonic susceptibility in the system. Analyzing the excitonic susceptibility, we have established phase diagrams of the excitonic insulator state depending on the model parameters. The phase structures confirmed the excitonic insulator state is found at low temperature and between two critical values of the Coulomb interaction. The effect of the external pressure on the formation of the excitonic insulator state is also shown.

Źródło:

Inżynieria Mineralna; 2021, 2; 199--206
1640-4920

Pojawia się w:

Inżynieria Mineralna

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 23.

Tytuł:

The impact of related parties’ trading on the listed company’s earnings management - evidence in Vietnam

Autorzy:

Hong, Nguyen Thi Phuong
Loi, Tran Van

Powiązania:

https://bibliotekanauki.pl/articles/1818335.pdf

Data publikacji:

2020

Wydawca:

Uniwersytet Zielonogórski. Wydział Ekonomii i Zarządzania

Tematy:

listed company
earnings management
related parties trading
modified Jones model
spółki giełdowe
zarządzanie zyskami
partner handlowy
model Jonesa

Opis:

This study considers the impact of related parties’ trading (RPTs) on the listed company’s earnings management level (EM) in Vietnam’s securities market, of which EM is measured according to the modified Jones model by Dechow and Associates (1995). Through using 5 more control variables as public. How auditing firm, firm size, financial leverage, revenue growth and operating cash flow affect EM, The research results show that RPTs impact the same dimension on EM level. The study provides empirical evidence of the impact of RPTs on the EM level of companies listed on Vietnam’s securities market. Among its results to science is that it indicated with evidence, the higher the RPTs are, the greater its EM level becomes. We also identify practical contributions and limitations shown in the conclusion section.

Źródło:

Management; 2020, 24, 2; 181-208
1429-9321
2299-193X

Pojawia się w:

Management

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 24.

Tytuł:

International tort law in Vietnam – Taking stock and the case for reform

Autorzy:

Doan, Luong Duc
Nguyen, Trinh Thi Hong

Powiązania:

https://bibliotekanauki.pl/articles/2143011.pdf

Data publikacji:

2020

Wydawca:

Polska Akademia Nauk. Instytut Nauk Prawnych PAN

Tematy:

applicable law
conflict of law
place of damage
tort
Vietnam

Źródło:

Polish Yearbook of International Law; 2020, 40; 255-271
0554-498X

Pojawia się w:

Polish Yearbook of International Law

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 25.

Tytuł:

Exposure to Noise Induced at Work and Prevention Practice Among Workers of Stone Mining Company, An Giang, 2018
Narażenie na hałas podczas pracy i praktyka prewencyjna wśród pracowników pracujących w kamieniołomach w rejonie prowincji An Giang, 2018

Autorzy:

Nguyen, Ngoc Bich
Huynh, thi Hong Giang

Powiązania:

https://bibliotekanauki.pl/articles/971091.pdf

Data publikacji:

2020

Wydawca:

Polskie Towarzystwo Przeróbki Kopalin

Tematy:

noise
occupational exposure
prevention practice
stone mining
vietnam
zanieczyszczenie hałasem
narażenie zawodowe
praktyka profilaktyczna
wydobycie kamienia
An Giang

Opis:

Noise is one of the most common occupational hazards in Vietnam, causing occupational hearing impairement. Stone mining is among the high-risk working environment. This study aims to describe noise exposure and prevention practice among workers of stone mining in An Giang province. A cross-sectional study using a quantitative method was conducted in 2018. 176 noise samples were collected, and 215 workers were interviewed using a structured questionnaire. Results show that workers at grinding section exposed with the high level of noise (compared to national standards) and they did not practice adequately to protect themselves from the hazard. Workers aged above 39 years old and had more than 10-year working experience had better prevention practice than the other groups. The differences were statistically significant. It is concluded that workers were exposed to the high level of noise at work, their practice regarding hearing impairement prevention was not adequate, and age, years of working were associated factors with prevention practice among workers.
W kamieniołomach na rejonie prowincji An Giang występuje szereg źródeł lub procesów emitujących hałas, który powoduje uciążliwość akustyczną przede wszystkim na stanowiskach pracy. Część procesów/źródeł pozostaje poza możliwościami zastosowania wyciszeń użycie materiałów wybuchowych w kopalni czy stosowanie ciężkiego sprzętu do transportu urobku. Uciążliwe dźwięki mogą być szkodliwe nie tylko dla słuchu, ale mają negatywny wpływ na cały organizm. Niniejsze badanie ma na celu opisanie narażenia na hałas i praktyk zapobiegawczych wśród pracowników górnictwa kamienia w prowincji An Giang. W 2018 roku przeprowadzono badanie przekrojowe metodą ilościową. Pobrano 176 próbek hałasu i przeprowadzono wywiady z 215 pracownikami za pomocą ustrukturyzowanego kwestionariusza. Wyniki pokazują, że pracownicy sekcji szlifowania narażeni byli na wysokim poziomie hałasu (w porównaniu z normami krajowymi) i nie ćwiczyli odpowiednio, aby chronić się przed zagrożeniem. Pracownicy w wieku powyżej 39 lat i mający ponad 10-letnie doświadczenie zawodowe mieli lepsze praktyki profilaktyczne niż inne grupy. Stwierdzono, że pracownicy byli narażeni na wysokim poziomie hałasu w miejscu pracy, ich praktyka w zakresie profilaktyki wad słuchu nie była adekwatna, a wiek, lata pracy były czynnikami związanymi z praktyką profilaktyczną wśród pracowników.

Źródło:

Inżynieria Mineralna; 2020, 1, 2; 283-289
1640-4920

Pojawia się w:

Inżynieria Mineralna

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 26.

Tytuł:

Experimental study of the hydraulic jump length in a smooth trapezoidal channel

Autorzy:

Ngoc, Nguyen Minh
Cuong, Pham Hong
Son, Tran Thanh
Nam, Nguyen Van
Phong, Nguyen Thanh

Powiązania:

https://bibliotekanauki.pl/articles/35547843.pdf

Data publikacji:

2022

Wydawca:

Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie

Tematy:

jump lenght
roller length
hydraulic jump
trapezoidal channel
spillway

Opis:

The article showed the result of investigation of the length of hydraulic jump in trapezoidal channel. In this study, the basic factors that affect the length (Lj) and roller length (Lr) of hydraulic jump were investigated by physical trapezoidal channel’s model. The experiment carried out in purpose to establish a new empirical equation for calculating the roller length (Lr) of the jump in the horizontal trapezoidal channel with the upstream flow Froude number 4.0 to 9.0 (the steady jump). The hydraulic characteristics of forced jump were measured and statistically calculated by excel software. The results of data analysis showed that the MAPE was relatively small (< 5%), and R2 > 0.9 (strong correlation between predicted and observed values) and other statistical indicators are less than 0.1 (MSE = 0.004, RMSE = 0.062 và MEA = 0.047). Therefore, the equation found could be appropriated and applied to calculate characteristics of hydraulic jump trapezoidal channel.

Źródło:

Scientific Review Engineering and Environmental Sciences; 2022, 31, 1; 63-76
1732-9353

Pojawia się w:

Scientific Review Engineering and Environmental Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 27.

Tytuł:

Modeling labor productivity in high-rise building construction projects using neural networks

Autorzy:

Nguyen, Duc Anh
Tran, Dung Quang
Nguyen, Thoan Ngoc
Tran, Hai Hong

Powiązania:

https://bibliotekanauki.pl/articles/2203438.pdf

Data publikacji:

2023

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Opis:

Labor productivity in building construction has long been a focused research topic due to the high contribution of labor cost in the building total costs. This study, among a few studies that used scaled data that were collected directly from measuring equipment and onsite activities, utilized neural networks to model the productivity of two main construction tasks and influencing factors. The neural networks show their ability to predict the behaviors of labor productivity of the formwork and rebar tasks in a test case of a high-rise building. A multilayer perceptron that had two layers and used sigmoid as its activation function provided the best effectiveness in predicting the relations among data. Among eleven independent factors, weather (e.g., temperature, precipitation, sun) generally played the most important role while crew factors were distributed in the mid of the ranking and the site factor (working floor height) played a mild role. This study confirms the robustness of neural networks in productivity research problems and the importance of working environments to labor productivity in building construction. Managerial implications, including careful environmental factors and crew structure deliberation, evolved from the study when labor productivity improvement is considered.

Źródło:

Archives of Civil Engineering; 2023, 69, 1; 675--692
1230-2945

Pojawia się w:

Archives of Civil Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 28.

Tytuł:

Intention of the Households in Domestic Waste Classification in Vinh Chau Town, Soc Trang Province, Vietnam

Autorzy:

Giao, Nguyen Thanh
Kiet, Nguyen Tuan
Nhien, Huynh Thi Hong
Phuc, Son

Powiązania:

https://bibliotekanauki.pl/articles/2202374.pdf

Data publikacji:

2023

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

domestic solid waste
household
intention to segregate garbage
Vinh Chau town
Soc Trang province

Opis:

The study was conducted to determine the factors affecting the intention of people to segregate garbage in Vinh Chau town, Soc Trang province, Vietnam by surveying 198 households. Cronbach’s alpha analysis method, EFA analysis, and linear regression analysis were used in the study. The analysis results of Cronbach’s Alpha index, KMO and Bartlett's test showed that the questionnaire data used in the study was highly reliable and were suitable for EFA analysis. The results of linear regression analysis identified three factors including "subjective norm", "control of cognitive behavior" and "perceived level of garbage classification information" that had positive impact on intention of domestic solid waste classification of local people in Vinh Chau town, Soc Trang province, in which "subjective norm" was considered to be the most influential factor on the intention to classify domestic solid waste in the study area. Besides, the intention of the people to segregate the domestic solid waste was highly appreciated, but it has not been widely implemented in the locality. Therefore, the study proposed some governance implications based on the factors affecting the intention of people to classify household solid wastes. In particular, local authorities should pay special attention to propagating and disseminating policies and guidelines on the information of domestic solid waste and implementing a model of waste segregation at source.

Źródło:

Journal of Ecological Engineering; 2023, 24, 2; 1--11
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 29.

Tytuł:

Application of supply chain management in construction industry

Autorzy:

Nguyen, Phong Thanh
Nguyen, Vi Nguyen
Pham, Luan Hong
Nguyen, Thu Anh
Nguyen, Quyen Le Hoang Thuy To
Huynh, Vy Dang Bich

Powiązania:

https://bibliotekanauki.pl/articles/103168.pdf

Data publikacji:

2018

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

supply chain management (SCM)
limiting factor
construction industry
zarządzanie łańcuchem dostaw
czynnik ograniczający
przemysł budowlany

Opis:

The application of the supply chain management (SCM) in industry has achieved much success, especially in the manufacturing sector. In the current market, the Vietnamese construction companies must compete not only with domestic companies but also with foreign ones, the application of SCM is essential to improve efficiency and increase their competitive advantage. In this paper, a survey was carried out to identify factors that cause limitation in applying SCM to the Vietnamese construction industry. A qualitative approach was based on prime contractor’s perspective at the construction phase of the project. The survey questionnaire was designed by synthesizing and inheriting the previous studies and consultation with experts. The survey participants are those who have had working experience with main contractors and joined in the construction projects. The face-to-face interviews were conducted to collect data. Descriptive statistics analysis and Exploratory Factor Analysis (EFA) were used to analyze data. The results indicated seven leading causes which limited the application of SCM in the construction industry.

Źródło:

Advances in Science and Technology. Research Journal; 2018, 12, 2; 11-19
2299-8624

Pojawia się w:

Advances in Science and Technology. Research Journal

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 30.

Tytuł:

Exposure to Noise Induced at Work and Prevention Practice Among Workers of Stone Mining Company, An Giang, 2018
Narażenie na hałas podczas pracy i praktyka prewencyjna wśród pracowników pracujących w kamieniołomach w rejonie prowincji An Giang, 2018

Autorzy:

Nguyen, Ngoc Bich
Huynh, thi Hong Giang
Vo, Tan Khoa
Nguyen, Anh Tuan
Nguyen, Thuy Quynh

Powiązania:

https://bibliotekanauki.pl/articles/317894.pdf

Data publikacji:

2020

Wydawca:

Polskie Towarzystwo Przeróbki Kopalin

Tematy:

noise
occupational exposure
prevention practice
stone mining
Vietnam
zanieczyszczenie hałasem
narażenie zawodowe
praktyka profilaktyczna
wydobycie kamienia
An Giang

Opis:

Noise is one of the most common occupational hazards in Vietnam, causing occupational hearing impairement. Stone mining is among the high-risk working environment. This study aims to describe noise exposure and prevention practice among workers of stone mining in An Giang province. A cross-sectional study using a quantitative method was conducted in 2018. 176 noise samples were collected, and 215 workers were interviewed using a structured questionnaire. Results show that workers at grinding section exposed with the high level of noise (compared to national standards) and they did not practice adequately to protect themselves from the hazard. Workers aged above 39 years old and had more than 10-year working experience had better prevention practice than the other groups. The differences were statistically significant. It is concluded that workers were exposed to the high level of noise at work, their practice regarding hearing impairement prevention was not adequate, and age, years of working were associated factors with prevention practice among workers.
W kamieniołomach na rejonie prowincji An Giang występuje szereg źródeł lub procesów emitujących hałas, który powoduje uciążliwość akustyczną przede wszystkim na stanowiskach pracy. Część procesów/źródeł pozostaje poza możliwościami zastosowania wyciszeń użycie materiałów wybuchowych w kopalni czy stosowanie ciężkiego sprzętu do transportu urobku. Uciążliwe dźwięki mogą być szkodliwe nie tylko dla słuchu, ale mają negatywny wpływ na cały organizm. Niniejsze badanie ma na celu opisanie narażenia na hałas i praktyk zapobiegawczych wśród pracowników górnictwa kamienia w prowincji An Giang. W 2018 roku przeprowadzono badanie przekrojowe metodą ilościową. Pobrano 176 próbek hałasu i przeprowadzono wywiady z 215 pracownikami za pomocą ustrukturyzowanego kwestionariusza. Wyniki pokazują, że pracownicy sekcji szlifowania narażeni byli na wysokim poziomie hałasu (w porównaniu z normami krajowymi) i nie ćwiczyli odpowiednio, aby chronić się przed zagrożeniem. Pracownicy w wieku powyżej 39 lat i mający ponad 10-letnie doświadczenie zawodowe mieli lepsze praktyki profilaktyczne niż inne grupy. Stwierdzono, że pracownicy byli narażeni na wysokim poziomie hałasu w miejscu pracy, ich praktyka w zakresie profilaktyki wad słuchu nie była adekwatna, a wiek, lata pracy były czynnikami związanymi z praktyką profilaktyczną wśród pracowników.

Źródło:

Inżynieria Mineralna; 2020, 1, 2; 283-289
1640-4920

Pojawia się w:

Inżynieria Mineralna

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 31.

Tytuł:

Applying Electrical Impedance Tomography Techniques for Detection of Decay Inside Trees

Autorzy:

Kieu, Duy Thong
Vu, Hong Duong
Nguyen, Thi Thu Hang
Nguyen, Thu Thuy

Powiązania:

https://bibliotekanauki.pl/articles/2020936.pdf

Data publikacji:

2021

Wydawca:

Polskie Towarzystwo Przeróbki Kopalin

Tematy:

electrical impedance tomography
tree investigation
resistivity
conductivity
impedancja
przewodnictwo
opór elektryczny

Opis:

Trees play a critical role in creating green spaces in public areas such as streets, parks, schools, offices. Over time, the trees often get pests and diseases, and then rotten trees can break. To care for and conserve the trees, it is necessary to determine the condition inside the trunk, especially the possibility of having a hollow or not. Wood decay, modifications of moisture and ion content, density due to biotic and abiotic stress agents of water extremity, salinity, and infection strongly change (di-) electrical properties of wood. Hence, we propose to use electrical impedance tomography to detect the change in electrical properties inside the trees that can link to wood decay. In electrical impedance tomography, an array of electrodes is attached around the tree trunk, and small alternating currents are injected via these electrodes, so the resulting voltages are measured. Processing the data, we can construct the spatial distribution of impedance (or resistivity) of the object. In this work, we will present the preliminary results of our group research. We will show theoretical forward modeling results, followed by laboratory experiments and real data application. The results illustrate that electrical impedance tomography can be useful to define several decay scenarios inside the trees.

Źródło:

Inżynieria Mineralna; 2021, 2; 31--40
1640-4920

Pojawia się w:

Inżynieria Mineralna

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 32.

Tytuł:

Integration of Mobile and Meb GIS Technologies to Promote Smart and Sustainable Tourism in Vietnam

Autorzy:

Nguyen, Mai Dung
To, Xuan Ban
Le, Hong Anh

Powiązania:

https://bibliotekanauki.pl/articles/27323289.pdf

Data publikacji:

2023

Wydawca:

Polskie Towarzystwo Przeróbki Kopalin

Tematy:

mobile GIS
WebGIS
location-based services
smart and sustainable tourism
GIS
turystyka
Wietnam

Opis:

Tourism is one of the most important factors in economic growth in Vietnam. However, it requires the balance between economics, social-cultures, and ecology because of their big impacts. In this paper, we propose a platform with mobile and web-based applications that can support smart and sustainable tourism in Vietnam for both local governments and visitors. The mobile application allows visitors to access location-based services to explore the visiting area, such as finding nearby natural attractions, as well as information to minimize the negative effects of tourism on the environment and the local community. It also enables users to report negative impacts to local government. The web application allows local authorities to monitor the status and trends of the habitant, natural environment, tourism infrastructure and activities in the area. The system uses geographic information systems (GIS) and remote sensing techniques to collect, analye and visualize various indicators of sustainability. The platform is developed with open-source technologies such as NodeJS, PostgreSQL, and Flutter. The paper demonstrates the feasibility and usefulness of the proposed platform through case studies in Hoa Binh and BacKan, two provinces have many attractive natural sites.

Źródło:

Inżynieria Mineralna; 2023, 2; 225--230
1640-4920

Pojawia się w:

Inżynieria Mineralna

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 33.

Tytuł:

A syntactic component for Vietnamese language processing

Autorzy:

Le-Hong, P.
Roussanaly, A.
Nguyen, T. M. H.

Powiązania:

https://bibliotekanauki.pl/articles/103931.pdf

Data publikacji:

2015

Wydawca:

Polska Akademia Nauk. Instytut Podstaw Informatyki PAN

Tematy:

language
parsing
segmentation
syntactic component
tagging
tree-adjoining grammar
Vietnamese

Opis:

This paper presents the development of a grammar and a syntactic parser for the Vietnamese language. We first discuss the construction of a lexicalized tree-adjoining grammar using an automatic extraction approach. We then present the construction and evaluation of a deep syntactic parser based on the extracted grammar. This is a complete system that produces syntactic structures for Vietnamese sentences. A dependency annotation scheme for Vietnamese and an algorithm for extracting dependency structures from derivation trees are also proposed. This is the first Vietnamese parsing system capable of producing both constituency and dependency analyses. It offers encouraging performance: accuracy of 69.33% and 73.21% for constituency and dependency analysis, respectively.

Źródło:

Journal of Language Modelling; 2015, 3, 1; 145-184
2299-856X
2299-8470

Pojawia się w:

Journal of Language Modelling

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 34.

Tytuł:

Digital Transformation in Mining Sector in Vietnam
Transformacja cyfrowa w sektorze wydobywczym w Wietnamie

Autorzy:

Van Hau, Nguyen
Khanh Ly, Chau Thi
Quynh Nga, Nguyen
Hong Duyen, Nguyen Thi
Huong Hue, Tran Thi

Powiązania:

https://bibliotekanauki.pl/articles/2172085.pdf

Data publikacji:

2022

Wydawca:

Polskie Towarzystwo Przeróbki Kopalin

Tematy:

digital transformation
coal-mineral industry
mechanization
transformacja cyfrowa
przemysł węglowo-mineralny
mechanizacja

Opis:

Digital transformation is one of the inevitable trends in today’s world. Vietnam is one of the pioneer countries following this trend and has launched a national digital transformation program. Digital transformation has attracted great interest from both the community of scientists and managers in general and in the field of coal mining and other minerals. Currently, researchers have been focusing on issues, such as the theory of digital transformation in both state and the business sector, the relationships between digital transformation and the building of e-government or digital government, and between digital transformation and effective national administration. In this study, the method of document-based analysis (Desk review) was used to analyze and evaluate the current situation of digital transformation of the coal and mineral mining industry and identify achievements as well as limitations of the digital transformation process in the coal and mineral mining industry in Vietnam. The study presents the following issues: (1) Some general issues about digital transformation, in which the concept of digital transformation is clarified; Meaning of digital transformation in the field of coal and mineral mining; Requirements for digital transformation in the field of coal-mineral mining. (2) The current status of digital transformation in coal-mineral mining in Vietnam, including applying advanced technologies in exploration and mining, and application of advanced technologies in mining and environmental protection.
Cyfrowa transformacja to jeden z nieuniknionych trendów w dzisiejszym świecie. Wietnam jest jednym z pionierskich krajów podążających za tym trendem i uruchomił krajowy program transformacji cyfrowej. Transformacja cyfrowa cieszy się dużym zainteresowaniem zarówno środowiska naukowców, jak i menedżerów w ogóle oraz w obszarze górnictwa węgla kamiennego i innych kopalin. Obecnie badacze koncentrują się na takich zagadnieniach, jak teoria transformacji cyfrowej zarówno w państwie, jak iw sektorze biznesowym, związki między transformacją cyfrową a budową e-government lub cyfrowego rządu oraz między transformacją cyfrową a efektywną administracją państwową. W niniejszym opracowaniu metoda analizy dokumentów (Desk review) została wykorzystana do analizy i oceny aktualnej sytuacji transformacji cyfrowej górnictwa węgla kamiennego i kopalin oraz identyfikacji osiągnięć i ograniczeń procesu transformacji cyfrowej w górnictwie węglowym i mineralnym. przemysł wydobywczy minerałów w Wietnamie. W opracowaniu przedstawiono następujące zagadnienia: (1) Niektóre ogólne zagadnienia dotyczące transformacji cyfrowej, w których doprecyzowano pojęcie transformacji cyfrowej; Znaczenie transformacji cyfrowej w obszarze górnictwa węglowego i mineralnego; Wymagania transformacji cyfrowej w obszarze górnictwa węglowo-mineralnego. (2) Aktualny stan transformacji cyfrowej w górnictwie węglowo-mineralnym w Wietnamie, w tym zastosowanie zaawansowanych technologii w eksploracji i wydobyciu oraz zastosowanie zaawansowanych technologii w górnictwie i ochronie środowiska

Źródło:

Inżynieria Mineralna; 2022, 2; 21--30
1640-4920

Pojawia się w:

Inżynieria Mineralna

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 35.

Tytuł:

Assessment of Occurrence, Ecological and Health Risk of Heavy Metals in Agricultural Soil in the Hau Giang Province, Vietnam

Autorzy:

Hong, Tran Thi Kim
Dan, Truong Hoang
Giao, Nguyen Thanh

Powiązania:

https://bibliotekanauki.pl/articles/2173352.pdf

Data publikacji:

2022

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

agricultural soil
ecological risk
health risk
Hau Giang province

Opis:

The study aimed to evaluate the occurrence of some heavy metals in agricultural soil in the Hau Giang province, Vietnam. The geographical accumulation index (Igeo), pollutant load index (PLI) and ecological risk index (RI) are used to assess the pollution levels and potential ecological risks due to the presence of heavy metals in agricultural soil. The results showed that the mean concentrations of Cu, Pb and Zn in the soil ranged from 16.25–40.32, 18.05–29.92 and 52.78–147.22 mg/kg, respectively, within the limits of QCVN 03-MT:2015/BTNMT. Cluster analysis showed that Pb originated from the process of using fertilizers, especially phosphate fertilizers in farming. Cu and Zn possibly share a common origin from the use of pesticides and fungicides in agricultural production. The Igeo value of Cu, Pb and Zn gradually increases in the order of Cu < Zn < Pb. The PLI (1.03–1.97) reflected that the soil in the study area is moderately polluted. The RI (14.80–25.33) represented a low potential ecological risk. In particular, position D3 had the highest level of pollution and risk among the study sites. Pb had the highest level of accumulation in soil with the highest single ecological risk factor; thus, measures should be taken to limit the source of Pb generation. The results of the study also indicated that ingestion route is the main exposure pathway by which heavy metals can be harmful to humans.

Źródło:

Journal of Ecological Engineering; 2022, 23, 9; 61--71
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 36.

Tytuł:

Analysis of Spatial-Temporal Variations of Surface Water Quality in the Southern Province of Vietnamese Mekong Delta Using Multivariate Statistical Analysis

Autorzy:

Hong, Tran Thi Kim
Viet, Le Hoang
Giao, Nguyen Thanh

Powiązania:

https://bibliotekanauki.pl/articles/2173256.pdf

Data publikacji:

2022

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

surface water
organic pollution
multivariate statistical analysis
Tien Giang province

Opis:

The study aimed to assess the variation in surface water quality in the Tien Giang province, Vietnam, and at the same time identify the main sources of water pollution. The surface water quality samples were collected at 34 locations (NM01-NM34) with 17 surface water quality indicators in March, June, September and November in canals and rivers in the Tien Giang province. Multivariate statistical analysis methods, including principal component analysis (PCA), cluster analysis (CA) and numerical discriminant analysis (DA), were used to analyze the variability and key indicators affecting the effect of multivariate statistical analysis. The analysis results show that the surface water quality in the study area is contaminated with organic (low DO, high BOD and COD) and nutrients (NH4+-N, NO2--N, PO43--P and TP), salinity (high Cl-). The PCA results showed that 14/17 surface water environmental parameters to be monitored are pH, temperature, TSS, BOD, COD, NH4+-N, NO2--N, PO43--P, TP, SO42-, Cl-, coliform and Fe. The PCA analysis showed that PC1-PC4 accounted for 79.70% of the variation in surface water quality in the study area. Potential surface water polluting sources include hydrological regime, domestic waste, agricultural production, industrial production activities. The CA results showed that 34 monitoring locations can be reduced to 27 locations, with a frequency of 4 times/year to ensure surface water quality representativeness. The DA indicated that the indicators of EC, SO42- and Cl- made the difference of the surface water quality between the wet and dry seasons. The current results provide important information on the current state of water quality for different uses and contribute to the improvement of the surface water quality monitoring system in the Tien Giang province.

Źródło:

Journal of Ecological Engineering; 2022, 23, 7; 1--9
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 37.

Tytuł:

Developing Criteria for Assessing The Stability of Water Supply Models in High Mountains and Water-Scare Areas

Autorzy:

Nguyen, Manh Truong
Dinh, Anh Tuan
Nguyen, Tiep Tan
Vu, Thi Hong Nghia
Do, Van Binh

Powiązania:

https://bibliotekanauki.pl/articles/27323245.pdf

Data publikacji:

2023

Wydawca:

Polskie Towarzystwo Przeróbki Kopalin

Tematy:

criteria
water supply
high mountain
Vietnam
kryteria
Wietnam
woda

Opis:

The article presents the scientific basis for assessing the stability of water supply models and develops a suitable set of criteria to assess the stability of water supply works, which includes the water supply part for water supply works and systems (including headworks and water distribution systems) in high mountains and water-scarce areas in Vietnam. Research results indicate that in order to improve the stability and availability of water of the models that have been, are and will be built, it is necessary to have a common method of evaluating effectiveness for scientific models of domestic water supply. Accordingly, it is necessary to build obtain a suitable set of criteria to assess the stability of the water supply model (source + water supply works) in the high mountains, water-scarce areas in Vietnam.

Źródło:

Inżynieria Mineralna; 2023, 2; 179--186
1640-4920

Pojawia się w:

Inżynieria Mineralna

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 38.

Tytuł:

Comparison of the Resampling Methods for Gridded DEM Downscaling
Porównanie metod ponownego próbkowania dla skalowanego w dół zmniejszania DEM

Autorzy:

Nguyen, Quang Minh
Nguyen, Thi Thu Huong
La, Phu Hien
Duong, Thi Tuyet Nhung
Nguyen, Thi Minh Hong
Vu, Van Anh

Powiązania:

https://bibliotekanauki.pl/articles/318242.pdf

Data publikacji:

2019

Wydawca:

Polskie Towarzystwo Przeróbki Kopalin

Tematy:

próbkowanie
skalowanie
DEM
resampling
downscaling

Opis:

In this paper, a comparison and evaluation of three resampling methods for gridded DEM is implemented. The evaluation was based on the results of bilinear resampling, bi-cubic and Kriging resampling methods for an experiment using both degraded and sampled datasets at 20 m and 60 m spatial resolutions. The evaluation of the algorithms was accomplished comprehensively with visual and quantitative assessments. The visual assessment process was based on direct comparison of the same topographic features in different downscaled images, scatterplots and profiles. The quantitative assessment was based on the most commonly used parameters for DEM accuracy assessment such as root mean square errors (RMSEs), linear regression parameters m and b, and correlation coefficient R. Both visual and quantitative assessment revealed greater accuracy of the Kriging over the other two conventional methods.

Źródło:

Inżynieria Mineralna; 2019, 21, 2/2; 240-248
1640-4920

Pojawia się w:

Inżynieria Mineralna

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 39.

Tytuł:

Ecological Risk Assessment for Occurrence of Toxic Elements in Various Land Use Types in Vietnamese Mekong Delta Province

Autorzy:

Nhien, Huynh Thi Hong
Mi, Le Thi Diem
Giao, Nguyen Thanh

Powiązania:

https://bibliotekanauki.pl/articles/2173267.pdf

Data publikacji:

2022

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

An Giang
ecological risk
heavy metals
land use type
pollution index

Opis:

A total of 316 soil samples in the An Giang province were collected from the industrial zone (48 samples), mining (40 samples), farming (112 samples), landfills (88 samples) and cemeteries (28 a samples) to analyze toxic elements, including Cu, Zn, Pb, Cd and As. The geoaccumulation index (Igeo), pollutant load index (PLI) and potential ecological risk index (RI) were used to assess pollution levels and ecological risks. The results showed that the concentrations of heavy metals were almost still within the allowable limits of national standards. Cd was not detected. Heavy metals were detected in the soil in the following order: As < Pb < Cu < Zn, mining < industrial < landfill < cultivation < cemetery areas. The heavy metals contributing to soil environmental variability were similarly identified in the cemetery with industry and landfill with farming. The value of Igeo shows that As has a high potential to accumulate in soil in all land uses. The ranges of PLI values presented that the soil in industrial, farming, mining and landfills areas were classified moderate, while the cemetery areas has been rated at a high level. The RI values identified very high, high, and moderate ecological risks for cemetery, industrial and farming land and landfill, mining, respectively. The combination of PLI and RI indices showed that the cemetery areas were at the highest levels of pollution and risk. The results of this study provide scientific information on pollution level and ecological risks in various land use types supporting environmental zoning and managing strategies in the An Giang province.

Źródło:

Journal of Ecological Engineering; 2022, 23, 7; 121--130
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 40.

Tytuł:

Fatty Acid Composition and Anticancer Activity of Neutral and Polar Lipids of Pacific Oyster (Crassostrea gigas) Cultured in Khanh Hoa Coast in Vietnam

Autorzy:

Nguyen, Minh V.
Kakooza, Derrick
Do, Thi Hong Tuoi
Tran, Anh P.
Nguyen, Han T.
Tran, Ngoc Q.

Powiązania:

https://bibliotekanauki.pl/articles/31341116.pdf

Data publikacji:

2024-05-24

Wydawca:

Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie

Tematy:

anticancer activity
fatty acid profile
lipid fraction
n3/n6 ratio
thrombogenicity

Opis:

In this study, we investigated the fatty acid composition and anticancer activity of neutral and polar lipid fractions extracted from Crassostrea gigas oysters cultured in Nha Phu Lagoon, Khanh Hoa Coast, harvested during the five months of January, April, May, September, and November. Analysis revealed that saturated fatty acids (SFAs) were the most abundant fatty acids in the neutral lipid fraction, followed by monounsaturated fatty acids (MUFAs) and polyunsaturated fatty acids (PUFAs). Conversely, the polar lipid fraction exhibited a different order, with PUFAs being the most abundant, followed by MUFAs and SFAs. Eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) were identified as the most prevalent polyunsaturated fatty acids, while oleic acid and palmitic acid were the predominant monounsaturated and saturated fatty acids, respectively. Notably, the combined content of EPA and DHA in the polar lipid fraction consistently exceeded 30% throughout all five months of analysis. Thrombogenicity index (TI) values ranged from 0.13 to 0.29 for the polar lipid fraction and from 0.6 to 1.1 for the neutral lipid fraction. Moreover, the polar lipid fraction exhibited significantly higher n3/n6 ratios compared to the neutral lipid fraction. The polar lipid fraction exhibited stronger inhibitory effects on the growth of the three cancer cell lines (HepG2, MDA-MB-231, and RD) compared to the neutral lipid fraction. The findings of the present study show that lipids extracted from C. gigas oysters cultured in Khanh Hoa Coast have a weak anticancer activity but may still aid in prevention and treatment of certain cancer types.

Źródło:

Polish Journal of Food and Nutrition Sciences; 2024, 74, 2; 169-176
1230-0322
2083-6007

Pojawia się w:

Polish Journal of Food and Nutrition Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 41.

Tytuł:

Sediment discharge and storage over the last deglacial highstand period on the central Vietnam shelf off Nha Trang

Autorzy:

Dung, Bui Viet
Stattegger, Karl
Kieu, Nguyen Van
Thanh, Nguyen Trung
Thong, Bui Xuan
Vu, Pham Nguyen Ha
Man, Ha Quang
Trang, Pham Hong

Powiązania:

https://bibliotekanauki.pl/articles/2058662.pdf

Data publikacji:

2019

Wydawca:

Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy

Tematy:

sediment budget
Nha Trang shelf
central Vietnam
Holocene highstand
sequence stratigraphy

Opis:

A sediment budget for the central Vietnam shelf off Nha Trang over the last deglacial Holocene highstand period has been investigated on the basis of shallow seismic and sediment core data and empirical equations. The annual suspended sediment discharge to the Nha Trang shelf ranges from: 4.3 to 5.4 Mt/year. Estimates based on published empirical equations suggest that the sediment discharge by three main local mountainous rivers (the Cai, Dinh and Van Phong rivers) that enter the Nha Trang shelf ranges between 1.7 and 4 Mt/year, which implies that the local rivers discharge approximately 75% of the total annual sediment input to the shelf. The annual sediment supply of the Cai River is approximately 2 and 6 times higher than that of the Dinh and Van Phong rivers, respectively. The highstand sediment depocentre of the Nha Trang shelf is mostly attached to the local river outflows, indicating their importance as the principal sediment supply sources to the shelf. Additional sources of sediment supply to the Nha Trang shelf can probably be related to along-shore transport from the nearby shelves. Calculations based on seismic and sediment core data indicate that the net sediment volume storage on the Nha Trang shelf is approximately 2.15 Mt/year. Approximately 50% of the total sediment yield supplied to the shelf is probably transported along-shore to the south. The sediment budget model for highstand deposits on the Nha Trang shelf is typical for a small mountainous river basin, which is significantly different from that of the large river delta systems in Vietnam such as the Mekong and Red rivers where 90% of the river sediments are captured on the delta plain/subaqueous part and only 10% of the river sediments are transported to the nearby shelf. In contrast, most of the sediments supplied by small mountainous rivers off Nha Trang are transported to the mid-shelf, forming a shore-parallel mud depocentre.

Źródło:

Geological Quarterly; 2019, 63, 2; 395--406
1641-7291

Pojawia się w:

Geological Quarterly

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 42.

Tytuł:

Variation in Growth and Yield of Sacha Inchi (Plukenetia Volubilis L.) under Different Ecological Regions in Vietnam

Autorzy:

Van, Quang Vu
Thi, Ngoc Yen Pham
Thi, Tram Nguyen
Van, Muoi Nguyen
Van, Thanh Le
Thi, Bich Ngoc Vu
Thi, Bich Hong Nguyen

Powiązania:

https://bibliotekanauki.pl/articles/2173335.pdf

Data publikacji:

2022

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

ecological region
growth
sacha inchi
selection
yield

Opis:

The sacha inchi seeds (Plukenetia Volubilis L.), collected from different ecological regions of Vietnam (the Northern Mountainous region, the North Central region, and Central Highlands Area), were sown in the spring crop (March 2020) in Gia Lam district, Hanoi city, Vietnam. The variety S18 was copyrighted by Ministry of Agriculture and Rural Developmentof Vietnam in 2019 as a special medicinal plant variety. During the period of 26 months after planting, the agronomical parameters, growth and development characteristics (leaf form, number of inflorescences per branches, number of female flowers per inflorescences, etc.), pests and diseases, yields and yield components (number of seeds per fruit, seed weight, seed grain, etc.), ratio of kernel per seed and ratio of oil per seed were evaluated. The evaluation results show that the collected sacha inchi lines have a time from sowing to flowering and fruiting of 108–125 days, a fruiting to ripening of 123–125 days, and a time from sowing to harvesting the first batch of 244–250 days. The annual harvest is carried out at two main times: May–June and November–January. The actual yield of the first two periods is high (2.66–3.07 tons per hectare), and the highest yield is collected in the Northern Mountainous area is 3.07 tons per hectare (in Tuyen Quang province), while and 3.01 tons per hectare are collected in the North Central region (in Thanh Hoa province). In the nursery, root rot caused 2.1–5.3% deaths and green wilt caused 3.1–4.8% deaths of seedlings. In the planting garden, fruit borers, stem borers, cavity worms and red spiders were discovered, causing more serious damage than other types (from 5 to over 50%). The results of evaluation of growth, development, yield components and yield showed that the sacha inchi lines collected in the North Central region (in Thanh Hoa province) and the Northern Mountainous region (in Tuyen Quang province) is the best.

Źródło:

Journal of Ecological Engineering; 2022, 23, 8; 162--169
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 43.

Tytuł:

Utility of GSMap Precipitation and Point Scale in Gauge Measurements for Stream Flow Modelling – A Case Study in Lam River Basin, Vietnam

Autorzy:

Kha, Dang Dinh
Nhu, Nguyen Y.
Long, Vu Viet
Van, Dao Thi Hong

Powiązania:

https://bibliotekanauki.pl/articles/123552.pdf

Data publikacji:

2020

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

GSMaP
SWAT model
merging
Lam river basin
flow modelling

Opis:

The benefit from integrating the information from multi-source was confirmed in the research of hydrologic processes in river basins. However, the use of satellite-based rainfall products in hydrologic stream flow modeling has been limited because of the perceived uncertainty associated with such data. In this study the authors presented the simulated streamflow from a SWAT model driven by merging rainfall between satellite and gauge-observed rainfall for the Lam River Basin. The results demonstrate the usefulness of merging rainfall data for stream flow modelling at a monthly time step.

Źródło:

Journal of Ecological Engineering; 2020, 21, 2; 39-45
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 44.

Tytuł:

Identifying Key Parameters Influencing Soil Quality at Various Depths in Tram Chim National Park, Dong Thap Province, Vietnam

Autorzy:

Giao, Nguyen Thanh
Nhien, Huynh Thi Hong
Dan, Truong Hoang
Ni, Duong Van

Powiązania:

https://bibliotekanauki.pl/articles/2202379.pdf

Data publikacji:

2023

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

soil quality
national park
organic matter
alkaline soil
multivariate analysis

Opis:

This study used multivariate statistics including cluster analysis (CA) and principal component analysis (PCA) to evaluate the variability and key indicators causing changes in soil quality in Tram Chim National Park, Dong Thap province, Vietnam. Soil samples were collected in the dry season at the habitats of Ischaemum rugosum (CM), Panicum repens (CO), Nelumbo nucifera (LS), Eleocharis dulcis (NO), Oryza rufipogon (LM), Rice field (RL), Melaleuca cajuputi (T) in two layers: A (0–20 cm) and B (20–40 cm). The parameters of pH, total nitrogen (TN), total phosphorus (TP), total acidity (TA), organic matter (OM), total iron (Fe) and exchanged aluminum (Al3+) were used to assess soil quality. The results showed that soil pH was low in both A and B layers. Fe and Al were both high, and the concentrations of these metals in layer A were higher than those in layer B. The OM content was medium while the TN and TP levels were very low. Most of the soil quality indicators tended to decrease with the depth (except for TA). The results of CA analysis showed that there was almost no major change in soil quality between the two soil layers; however, the soil quality in rice field habitat was different from other habitats. The cause may be due to human impact in adding fertilizers/pesticides during farming practices. The PCA results showed at least five influencing factors, explaining 99.7% and 99.9% of soil quality variation in A and B layers. The Al3+, TA, OM, and TP parameters had the main influence on the soil quality of layer A. Meanwhile, the pH, Al3+, TA, TN, Fet indicators had influence on the soil quality of layer B. These indicators need to be future surveyed to assess the evolution of soil quality in the study area.

Źródło:

Journal of Ecological Engineering; 2023, 24, 2; 81--91
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 45.

Tytuł:

Monitoring Vegetation Cover Changes by Sentinel-1 Radar Images Using Random Forest Classification Method

Autorzy:

Tran, Van Anh
Le, Thi Le
Nguyen, Nhu Hung
Le, Thanh Nghi
Tran, Hong Hanh

Powiązania:

https://bibliotekanauki.pl/articles/2020227.pdf

Data publikacji:

2021

Wydawca:

Polskie Towarzystwo Przeróbki Kopalin

Tematy:

vegetation cover change,
Sentinel-1
Random Forest
Binh Duong
Vietnam
Wietnam
wegetacja

Opis:

Vietnam is an Asian country with hot and humid tropical climate throughout the year. Forests account for more than 40% of the total land area and have a very rich and diverse vegetation. Monitoring the changes in the vegetation cover is obviously important yet challenging, considering such large varying areas and climatic conditions. A traditional remote sensing technique to monitor the vegetation cover involves the use of optical satellite images. However, in presence of the cloud cover, the analyses done using optical satellite image are not reliable. In such a scenario, radar images are a useful alternative due to the ability of radar pulses in penetrating through the clouds, regardless of day or night. In this study, we have used multi temporal C band satellite images to monitor vegetation cover changes for an area in Dau Tieng and Ben Cat districts of Binh Duong province, Mekong Delta, Vietnam. With a collection of 46 images between March 2015 and February 2017, the changes of five land cover types including vegetation loss and replanting in 2017 were analyzed by selecting two cases, using 9 images in the dry season of 3 years 2015, 2016 and 2017 and using all of 46 images to conduct Random Forest classifier with 100, 200, 300 and 500 trees respectively. The result in which the model with nine images and 300 trees gave the best accuracy with an overall accuracy of 98.4% and a Kappa of 0.97. The results demonstrated that using VH polarization, Sentinel-1 gives quite a good accuracy for vegetation cover change. Therefore, Sentinel-1 can also be used to generate reliable land cover maps suitable for different applications.

Źródło:

Inżynieria Mineralna; 2021, 2; 441--451
1640-4920

Pojawia się w:

Inżynieria Mineralna

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 46.

Tytuł:

Variation in Root Development Response of Napier Grass to Drought Stress

Autorzy:

Nguyen, Loc Van
Tran, Ngoc Minh Thi
Nguyen, Long Viet
Phan, Hong Nhung Thi
Rumanzi, Mbaraka Saidi
Pham, Cuong Van
Tang, Hanh Thi

Powiązania:

https://bibliotekanauki.pl/articles/1955525.pdf

Data publikacji:

2021

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

drought level
Napier grass
root response
root length

Opis:

Global climate change and increasing agricultural activity are the main causes of biotic and abiotic stresses, which negatively affect the plant growth and crop yields. The plant root system is the first organ for sensing the soil moisture limitation; therefore root growth under elevated water deficit is an important indicator for plant’s drought tolerance. Although the previous studies focused on the morphological traits of Napier grasses under water stresses, the root growth changes due to drought levels remain largely unclear. In order to evaluate variation in root performance to respond to drought stress, four cultivars named "Cỏ voi thuần" (CVT), King grass, Packchong, and VA06 were grown for 10 days under drought conditions under polyethylene glycol 6000 (PEG6000): 0% PEG6000 as control, 5% PEG6000, 10% PEG6000, 15% PEG6000 and 20% PEG6000. As compared to control, the root growth of all cultivars was reduced under drought treatments; however, significant variation in the root development response to drought levels was found. Among Napier cultivars, "Cỏ voi thuần" expressed drought-tolerant genotypes. The information on the root length, diameter, surface area and volume of the cultivars reveals interesting guidelines for further studies to explore the mechanisms behind root adaptation of Napier grasses to drought.

Źródło:

Journal of Ecological Engineering; 2021, 22, 8; 64-74
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 47.

Tytuł:

Research on social security through Buddhism in the Tran dynasty
Badania nad zabezpieczeniem społecznym przez buddyzm w dynastii Tran

Autorzy:

(Rev. Thich Thanh Dien), Duong Quang Dien
Thi Phuong Chi, Nguyen
Van Tuan, Nguyen
Van Kieu (Most Rev. Thich Dao Thinh), Bui
Thi Minh Hong (Bhikkhuni Thich Dieu Tam), Cao
Thi Nga, Nguyen

Powiązania:

https://bibliotekanauki.pl/articles/1790768.pdf

Data publikacji:

2021

Wydawca:

Towarzystwo Wiedzy Powszechnej w Szczecinie

Tematy:

Social security
amnesty
Buddhism
Tran dynasty
amnestia
Buddyzm
dynastia Tran.
zabezpieczenie spoełczne

Opis:

During the period from 8th Century to early decades of the 14th Century, Dai Viet was in the course of prosperous development with reigns of Tran Thai Tong (ruled from 1226-1258), Tran Thanh Tong (1258-1278), Tran Nhan Tong (1278-1293), Tran Anh Tong (1293-1314), Tran Minh Tong (1914-1329), and Trang Hien Ton (1329-1341). We can say that this is time of prosperity and advance of Tran Dynasty. The Tran Kings’ piety upon Buddhism had a great impact on thought and government policies, especially the spirit of equality and humanity. Kings of Tran express a great care on life of the people, try to relieve their toils, reduce their duties, help the poor, and enhance the social security.116 From Tran Du Tong onwards, all was not as before anymore. Research on social security by Buddhism in Tran dynasty can be presented in many aspects, but this article just focuses on clarifying the social security through Buddhism’s care on material and spiritual life of the people.
W okresie od VIII wieku do wczesnych dekad XIV wieku - za czasów panowania: Tran Thai Tong (rządził od 1226-1258), Tran Thanh Tong (1258-1278), Tran Nhan Tong (1278-1293), Tran Anh Tong (1293-1314), Tran Minh Tong (1914-1329), i Trang Hien Ton (1329-1341) - Dai Viet był w na drodze rozwoju. Można powiedzieć, że jest to czas prosperity i postępu dynastii Tran. Pobożność królów Tranu wobec buddyzmu miała wielki wpływ na myślenie i politykę rządu, zwłaszcza na ducha równości i człowieczeństwa. Królowie dynastii Tran wyrażają wielką troskę o życie ludzi, starają się ulżyć im w trudach, zmniejszają ich obowiązki, pomagają biednym i zwiększają bezpieczeństwo społeczne. Od czasów Tran Du Tong, wszystko nie było już takie jak dawniej. Badania nad zabezpieczeniem społecznym przez Buddyzm w dynastii Tran można przedstawić w wielu aspektach, niniejszy artykuł koncentruje się jednak tylko na wyjaśnieniu zabezpieczenia społecznego poprzez opiekę Buddyzmu nad materialnym i duchowym życiem ludzi.

Źródło:

Edukacja Humanistyczna; 2021, 1, 44; 171-193
1507-4943

Pojawia się w:

Edukacja Humanistyczna

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 48.

Tytuł:

Hybrid end-to-end approach integrating online learning with face-identification system

Autorzy:

Nguyene, Dat Van
Nguyen, Son Trung
Pham, Thi Hong Anh
Pham, Van Toan
Hoang, Thao Thu
Thanh, Ta Minh

Powiązania:

https://bibliotekanauki.pl/articles/27312886.pdf

Data publikacji:

2023

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH

Tematy:

facial recognition
visual search engine
end-to-end applications
online learning
ElasticSearch (ES)
ES

Opis:

Facial recognition has been one of the most intriguing and exciting research topics over the last few years. It involves multiple face-based algorithms such asfacial detection, facial alignment, facial representation, and facial recognition. However, all of these algorithms are derived from large deep-learning architectures, leading to limitations in development, scalability, accuracy, and deployment for public use with mere CPU servers. Also, large data sets that contain hundreds of thousands of records are often required for training purposes. In this paper, we propose a complete pipeline for an effective face-recognition application that requires only a small data set of Vietnamese celebrities and a CPU for training, solving the problem of data leakage, and the need for GPU devices. The pipeline is based on the combination of a conversion algorithm from face vectors to string tokens and the indexing & retrieval process by Elasticsearch, thereby tackling the problem of online learning in facial recognition. Compared with other popular algorithms on the same data set, our proposed pipeline not only outperforms the counterpart in terms of accuracy but also delivers faster inference, which is essential to real-time applications.

Źródło:

Computer Science; 2023, 24 (1); 141--161
1508-2806
2300-7036

Pojawia się w:

Computer Science

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 49.

Tytuł:

Effects of social marketing on attitudes and behavior related to road traffic in Hanoi city

Autorzy:

Nhung, Ngo Thi Hong
Hai, Do Huu
Dung, Vu Tri
Thong, Le Ngoc
Trung, Pham Quang
Cuong, Nguyen Hung

Powiązania:

https://bibliotekanauki.pl/articles/27314064.pdf

Data publikacji:

2023

Wydawca:

Politechnika Śląska. Wydawnictwo Politechniki Śląskiej

Tematy:

social marketing
attitude
behavior
road traffic
marketing społeczny
postawa
zachowanie
ruch drogowy

Opis:

Dangerous and risky actions while traveling on traffic routes that threaten the health, spirit and life of vehicle drivers and others. However, to raise community awareness, make them care about traffic safety behavior takes time and influence attitudes to create behavior change in a sustainable way. Research based on Ajzen’s theory of planned behavior [1, 2] and the theory of social marketing was conducted to identify the factors influencing the road traffic attitudes and behaviors of people in Hanoi and the degrees of their influence. The results show that road traffic attitudes are affected, in descending order, by partnership, resources, distribution, promotion, price, product, and public. The road traffic behavior of people is determined, in descending order, by age, moderator variables (the law and the validity of the law and weather), attitude, and education level. Based on the results, several recommendations to government officials and policymakers have been made.

Źródło:

Transport Problems; 2023, 18, 1; 193--202
1896-0596
2300-861X

Pojawia się w:

Transport Problems

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 50.

Tytuł:

Strategy in Dispatching Trucks and Shovels with Different Capacity to Increase the Operating Efficiency in Cao Son Surface Coal Mine, Vietnam

Autorzy:

Pham, Van Hoa
Tran, Trung Chuyen
Le, Hong Anh
Le, Thi Thu Hoa
Pham, Van Viet
Nguyen, Anh Tuan
Le, Thi Huong Giang

Powiązania:

https://bibliotekanauki.pl/articles/2020238.pdf

Data publikacji:

2021

Wydawca:

Polskie Towarzystwo Przeróbki Kopalin

Tematy:

truck dispatching
truck-shovel system
dispatching strategy
detailed match factor
górnictwo odkrywkowe
Wietnam
strategia

Opis:

In surface mining operations, the operating costs of truck-shovel system constitutes 50-60% of the total. Only a little save in the operation costs in this system will bring large profit for the mines. Due to many investment periods, the capacity of both trucks and shovels in Cao Son surface coal mine is different. This leads to the low efficiency and the difficulty in dispatching strategy for the mine. This paper presents the current situation and selection of advanced dispatching strategy for increasing the efficiency trucks and shovels at this surface coal mine. The results show the detailed match factor reflects the state of each team of loader and trucks and should be use as the indicator for dispatching decision for the heterogeneous truck and shovel fleet at Cao Son surface coal mine.

Źródło:

Inżynieria Mineralna; 2021, 2; 487--494
1640-4920

Pojawia się w:

Inżynieria Mineralna

Dostawca treści:

Biblioteka Nauki

/5

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