Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

Wyszukujesz frazę "Hong, Nguyen Thi" wg kryterium: Autor


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
Artykuł
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
Artykuł
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
Artykuł
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
Artykuł
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
Artykuł
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
Artykuł
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
Artykuł
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
Artykuł
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
Artykuł
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
Artykuł
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
Artykuł
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
Artykuł
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
Artykuł
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
Artykuł
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
Artykuł

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies