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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
Artykuł
Tytuł:
Determination of methane content at Maokhe coal mine from curent mining to -450 level in Vietnam
Określenie zawartości metanu w wietnamskiej kopalni węgla Mao Khe do poziomu 450
Autorzy:
Nguyen, VanThinh
Nguyen, CaoKhai
Nguyen, VanQuang
Tran, XuanHa
Powiązania:
https://bibliotekanauki.pl/articles/318056.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Przeróbki Kopalin
Tematy:
methane
coal mine
Vietnam
metan
kopalnia węgla kamiennego
Wietnam
Opis:
Methane gas is one of the most serious dangers of underground coal mining as its buildup can lead to methane gas explosion. In QuangNinh province- Vietnam, several coal mines such as TrangKhe II-III coal mine, Khe Cham coal mine, especially MaoKhe mine that have high methane content. At the MaoKhe coal mine,experimental data showed thatthe concentration of methane in coal seams at different depths were not similar.In order to ensure safety, this report has been undertaken to determine a pattern of changing methane contents of coal seams at different exploitation depths in MaoKhe underground coal mine.
Źródło:
Inżynieria Mineralna; 2019, 21, 2/2; 2-7
1640-4920
Pojawia się w:
Inżynieria Mineralna
Dostawca treści:
Biblioteka Nauki
Artykuł
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
Artykuł
Tytuł:
Social capital and digital transformation of startups in Vietnam: the mediating role of access to resources
Autorzy:
Nguyen, Dat Hoang Anh
Tran, Ghi Nha
Tran, Khoa Dang
Nguyen, Thach Ha
Powiązania:
https://bibliotekanauki.pl/articles/18029939.pdf
Data publikacji:
2023
Wydawca:
Uniwersytet Zielonogórski. Wydział Ekonomii i Zarządzania
Tematy:
social capital
access to resources
digital transformation
kapitał społeczny
dostęp do zasobów
transformacja cyfrowa
Opis:
The purpose of this study is to use social capital theory to explain how startups in Vietnam undergo the digital transformation process. The study investigates the connection between social capital, resource access, and digital transformation in Vietnamese startups. 230 managers were analyzed using the Partial Least Squares Structural Model (PLS-SEM). The study found a positive correlation between social capital, resource access, and digital transformation. Additionally, the study looked at the role of resource access as a mediator between social capital and digital transformation. The findings of this study hold immense importance for managers seeking to establish social capital with stakeholders, including government agencies, customers, competitors, and suppliers in the digital platform services industry. Leveraging social capital can increase managers’ access to crucial resources, especially during the Covid-19 pandemic. The study acknowledges its limitations and identifies areas for future research.
Źródło:
Management; 2023, 27, 1; 1d84--200
1429-9321
2299-193X
Pojawia się w:
Management
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
General Geometric Model of GNSS Position Time Series for Crustal Deformation Studies – A Case Study of CORS Stations in Vietnam
Autorzy:
Tran, Dinh Trong
Nguyen, Quoc Long
Nguyen, Dinh Huy
Powiązania:
https://bibliotekanauki.pl/articles/2019404.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Przeróbki Kopalin
Tematy:
geometric model
GNSS position time series
crustal deformation
CORS stations
Vietnam
model geometryczny
GNSS
Wietnam
Opis:
In processing of position time series of crustal deformation monitoring stations by continuous GNSS station, it is very important to determine the motion model to accurately determine the displacement velocity and other movements in the time series. This paper proposes (1) the general geometric model for analyzing GNSS position time series, including common phenomena such as linear trend, seasonal term, jumps, and post-seismic deformation; and (2) the approach for directly estimating time decay of postseismic deformations from GNSS position time series, which normally is determined based on seismic models or the physical process seismicity, etc. This model and approach are tested by synthetic position time series, of which the calculation results show that the estimated parameters are equal to the given parameters. In addition they were also used to process the real data which is GNSS position time series of 4 CORS stations in Vietnam, then the estimated velocity of these stations: DANA (n, e, u = -9.5, 31.5, 1.5 mm/year), HCMC (n, e, u = -9.5, 26.2, 1.9 mm/year), NADI (n, e, u = -10.6, 31.5, -13.4 mm/year), and NAVI (n, e, u = -13.9, 32.8, -1.1 mm/year) is similar to previous studies.
Źródło:
Inżynieria Mineralna; 2021, 2; 183--197
1640-4920
Pojawia się w:
Inżynieria Mineralna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sharing and connecting information in the context of the Covid-19 pandemic and training skills for employees to meet the needs of businesses in digital transformation
Autorzy:
Hang, Nguyen Thi
Tran, Trong Quyen
Powiązania:
https://bibliotekanauki.pl/articles/2174423.pdf
Data publikacji:
2022
Wydawca:
Uniwersytet Zielonogórski. Wydział Ekonomii i Zarządzania
Tematy:
digital economy
digital education
digital transactions
high-quality human resources
digital enterprise
Opis:
In the context of the strong outbreak of the Covid-19 pandemic leading to increasing social distancing, it is difficult for businesses to access the labor market. Therefore, it is necessary to create a connection channel between the employer and the labor supplier. That helps to adapt to the context of the Covid-19 pandemic, while also taking advantage of the achievements from the Industrial Revolution 4.0. The development of a training model that connects human resource trainers with human resource users who are businesses is considered an important requirement in the context of the Covid-19 pandemic. The university-enterprise model demonstrates active cooperation and has a profound impact on teaching and scientific research activities in universities. Since then, constantly improving the quality of training to create labor products that meet the rigorous needs of enterprises. This study uses exploratory factor analysis methods to screen observations to analyze, evaluate and draw conclusions about the formation of a university-enterprise linkage model. Thereby helping to create a bridge in cooperation between universities and businesses. On that basis, propose solutions to promote cooperation between universities and businesses in the current Vietnamese conditions, contributing to creating high-quality labor for society, meeting the needs of digital businesses.
Źródło:
Management; 2022, 26, 1; 93--117
1429-9321
2299-193X
Pojawia się w:
Management
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The extensive 1-median problem with radius on networks
Autorzy:
Nhan, Tran Hoai Ngoc
Hung, Nguyen Thanh
Nguyen, Kien Trung
Powiązania:
https://bibliotekanauki.pl/articles/29519649.pdf
Data publikacji:
2024
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
extensive facility
median problem
tree
convex
Opis:
The median location problem concerns finding locations of one or several new facilities that minimize the overall weighted distances from the existing to the new facilities. We address the problem of locating one new facility with a radius r on networks. Furthermore, the radius r is flexible and the objective function is the conic combination of the traditional 1-median function and the value r. We call this problem an extensive 1-median problem with radius on networks. To solve the problem, we first induce the so-called finite dominating set, that contains all points on the underlying network and radius values which are candidate for the optimal solution of the problem. This helps to develop a combinatorial algorithm that solves the problem on a general network G = (V,E) in O(|E||V|3) time. We also consider the underlying problem with improved algorithm on trees. Based the convexity of the objective function with variable radius, we develop a linear time algorithm to find an extensive 1-median with radius on the underlying tree.
Źródło:
Opuscula Mathematica; 2024, 44, 1; 135-149
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Social capital and digital transformation of startups in Vietnam during the COVID-19 pandemic: the mediating role of human capital and access to resources
Autorzy:
Nguyen, Thi Thuy Quynh
Ghi, Tran Nha
Nguyen, Tan Trung
Powiązania:
https://bibliotekanauki.pl/articles/27315592.pdf
Data publikacji:
2023
Wydawca:
STE GROUP
Tematy:
access to resources
digital transformation
human capital
social capital
Opis:
Based on social network theory, the study explained the digital transformation process of startups in Vietnam during the outbreak of the COVID-19 pandemic. The study examined the relationship between social capital, human capital, access to resources, and digital transformation of startups in Vietnam. The study used Partial Least Squares - Structural Equation Modelling (PLS-SEM) with a sample size of 230 startups managers. The results show that there are positive and statistically significant relationships between social capital, human capital, access to resources, and digital transformation. The results also reveal the partial mediating roles of access to resources and human capital in the relationship between social capital and digital transformation. The results proposed some managerial implications for startups managers in building relationship networks with stakeholders such as government agencies and business partners (customers, competitors, suppliers, and providers of digital platform services). Through managers' social capital, accessible resources and the improvement of human capital have accelerated digital transformation for startups to escape the crisis of the COVID-19 pandemic. Finally, the study presented some limitations and directions for further research.
Źródło:
Management Systems in Production Engineering; 2023, 1 (31); 33--42
2299-0461
Pojawia się w:
Management Systems in Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Variation in the Lipid Profile of Pacific Oyster (Crassostrea gigas) Cultured in Khanh Hoa Coast, Vietnam, Based on Location and Harvest Period
Autorzy:
Nguyen, Minh V.
Kakooza, Derrick
Tran, Anh P.
Tran, Vy T.
Powiązania:
https://bibliotekanauki.pl/articles/28408446.pdf
Data publikacji:
2024-01-26
Wydawca:
Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
Tematy:
fatty acids
farming location
harvest season
lipid profile
phospholipids
thrombogenicity index
Opis:
The lipid profiles of the oyster Crassostrea gigas cultured in Khanh Hoa coast at three locations and harvested in different months throughout the year were compared. Seasonal and locational changes in total lipid (TL) content, phospholipid content, free fatty acid content, fatty acid (FA) composition, and thrombogenicity index were found. The total lipid content and n-3/n-6 ratio in oysters from Ninh Hoa were higher compared to those from Cam Lam and Van Ninh. For oyster from all three farming areas, the total lipid content was the lowest during the two spawning seasons (May and September). Lipids from C. gigas were separated into neutral and polar lipid fractions using silica gel column chromatography. The amount of neutral lipids recovered from the oyster muscle was significantly higher than that of the polar lipids. The FA composition showed that C. gigas was abundant in saturated fatty acids (30.89–39.16 g/100 g TL), followed by polyunsaturated fatty acids (28.13–35.88 g/100 g TL), and monounsaturated fatty acids (19.32–23.75 g/100 g TL). The dominant polyunsaturated fatty acids of oysters from the three farming areas were eicosapentaenoic acid (9.09–13.77 g/100 g TL) and docosahexaenoic acid (6.71–16.47 g/100 g TL). Based on the present findings, it can be concluded that the Pacific oyster C. gigas cultured in Khanh Hoa, Vietnam is a promising source of highly nutritious exploitable lipids.
Źródło:
Polish Journal of Food and Nutrition Sciences; 2024, 74, 1; 16-25
1230-0322
2083-6007
Pojawia się w:
Polish Journal of Food and Nutrition Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
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:
Risk management under impacts of macro economic factors in a big seafood Ex-Import Firm - AnGiang Fisheries Ex-Import jsc. in Vietnam
Autorzy:
Thach, Nguyen Ngoc
Huy, Dinh Tran Ngoc
Powiązania:
https://bibliotekanauki.pl/articles/2064454.pdf
Data publikacji:
2021
Wydawca:
Uniwersytet Zielonogórski. Wydział Ekonomii i Zarządzania
Tematy:
risk management
macroeconomic factors
Vietnam
AGF stock price
GDP growth
inflationary
risk free rate
market interest rate
zarządzanie ryzykiem
czynniki makroekonomiczne
Wietnam
akcje AGF
wzrost PKB
inflacja
rynkowa stopa procentowa
Opis:
AnGiang Fisheries Ex-Import Joint Stock Company (AGF) was established in 2001. Agifish has traditionally been a leader in the fields of production and business activities, scientific research in the field of fingerling production, seafood processing technology and the development of value added products processed from Basa-fish, Tra-fish. Agifish cares about building a spirit of solidarity between leaders, managers and workers striving for the development of the Company. Because we figure out there isa research gap in which many previous studies forgot to explore both internal and external macroeconomic elements and their impacts on stock price of Agifish (AGF), a big Vietnam fisheries firm, in the context Viet Nam and the US economies receive impacts from global economic crisis. With the using of quantitative analysis and statistics, regression OLS, together with qualitative methods including synthesis, comparison and explanatory methods, authors recognize that, in a six factor model, AGF stock price goes up together with effects from increase in GDP growth and lending rate declines. Last but not least, our research model can be expanded to other markets.
Źródło:
Management; 2021, 25, 1; 172--185
1429-9321
2299-193X
Pojawia się w:
Management
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Abstraction layer for development and deployment of cloud services
Autorzy:
Nguyen Minh, B.
Tran, V.
Hluchy, L.
Powiązania:
https://bibliotekanauki.pl/articles/305457.pdf
Data publikacji:
2012
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
cloud computing
abstraction
service development
service deployment
interoperability
Opis:
In this paper, we will present an abstraction layer for cloud computing, which intends to simplify the manipulation with virtual machines in clouds for easy and controlled development and deployment of cloud services. It also ensures interoperability between different cloud infrastructures and allows developers to create cloud appliances easily via inheritance mechanisms.
Źródło:
Computer Science; 2012, 13 (3); 79-88
1508-2806
2300-7036
Pojawia się w:
Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Land Subsidence Detection in Tan My-Thuong Tan Open Pit Mine and Surrounding Areas by Time Series of Sentinel-1 Images
Wykrywanie osiadania powierzchni terenu górniczego w kopalni odkrywkowej Tan My-Thuong Tan i okolicach na podstawie wieloczasowych satelitarnych obrazów Sentinel-1
Autorzy:
Tran, Van Anh
Bui, Xuan‑Nam
Nguyen, Quoc Long
Tran, Tuan-Anh
Powiązania:
https://bibliotekanauki.pl/articles/319075.pdf
Data publikacji:
2020
Wydawca:
Polskie Towarzystwo Przeróbki Kopalin
Tematy:
open-pit mines
PSInSAR
land subsidence
Sentinel-1
Tan My-Thuong Tan
kopalnia odkrywkowa
osiadanie terenu
kamieniołom Tan My-Thuong Tan
Opis:
Open-pit or underground mining both causes environmental impacts such as air, soil, water pollution, etc., especially causing land subsidence of mines and surrounding areas. Research on mining subsidence is often carried out by field survey, the advantage of this method is high accuracy, but it is usually applied in a small scale. Recently, with the development of radar technology, there have been many studies applying this Radar Interferometry technique to determine surface subsidence over a wide range with a few millimeters accuracy. In this paper, 24 Sentinel-1 images were used as input materials, using the Permanent Scatter Interferometry (PSInSAR) method to determine the land subsidence of the Tan My-Thuong Tan quarries and surrounding areas. The results were compared with the average annual subsidence of 20 surveying points using GNSS technology from 1/2018 to 3/2020. The correlation coefficient of annual average land subsidence of the two methods is 0.83, showing the feasibility of applying InSAR Sentinel-1 data processed by PSInSAR method for determining mine surface deformation and surrounding area.
Zarówno górnictwo odkrywkowe, jak i podziemne powodują osiadanie powierzchni terenu górniczego i na otaczających obszarach. Badania osiadań górniczych są często prowadzone metodą monitorowania punktów stabilizowanych na liniach obserwacyjnych. Zaletą tej metody jest duża dokładność, ale najczęściej stosowana jest na niewielkim obszarze. Satelitarna interferometria radarowa InSAR jest teledetekcyjną techniką służącą do pozyskiwania danych osiadań powierzchni terenu w określonym przedziale czasu. Odpowiednie opracowanie dwóch radarogramów pozwala na uzyskanie izolinii okresowych niecek obniżeniowych na dużym obszarze. W artykule, przedstawiono wyniki zastosowania 24 obrazów satelitarnych Sentinel-1 wykorzystując metodę Permanent Scatter Interferometry (PSInSAR) do określenia osiadań powierzchni terenu górniczego kamieniołomu Tan My-Thuong Tan i okolic. Wyniki porównano ze średnimi rocznymi osiadaniami 20 punktów pomiarowych wykorzystujących technologię GNSS od 1/2018 do 3/2020. Współczynnik korelacji średnich rocznych osiadań gruntów obu metod wynosi 0,83, co wskazuje na możliwość wykorzystania danych InSAR Sentinel-1 przetworzonych metodą PSInSAR do wyznaczenia osiadań powierzchni terenu kopalni i otaczającego ją obszaru.
Źródło:
Inżynieria Mineralna; 2020, 1, 2; 171-180
1640-4920
Pojawia się w:
Inżynieria Mineralna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research and Development of Real-time High-precision GNSS Receivers: A Feasible Application for Surveying and Mapping in Vietnam
Autorzy:
Pham, Cong Khai
Nguyen, Gia Trong
Nguyen, Van Hai
Tran, Trong Xuan
Powiązania:
https://bibliotekanauki.pl/articles/2020209.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Przeróbki Kopalin
Tematy:
GNSS/CORS
low-cost high-precision
GNSS receivers
real-time high-precision GNSS receivers
NTRIP
BD970 Trimble
ZED-F9P
GNSS
geodezja
Wietnam
Opis:
In recent years, the Global Navigation Satellite System (GNSS) has been widely applied in surveying and mapping. Currently, in Vietnam, dual-frequency GNSS receivers are quite extensively applied with the real-time kinematic (RTK) measurement technique using a continuously operating reference station network. However, high-accuracy GNSS receivers are often expensive, sometimes not meeting the needs of users for specific applications. This research develops two types of low-cost highprecision GNSS receivers for RTK positioning for different purposes. First, the millimeter precision GNSS receiver used in real-time displacement monitoring is based on Trimble's BD970 mainboard technology and some other modules. These components are interconnected according to a standard design scheme and assembled in an enclosure to form a GNSS receiver. In addition, a GNSS data transmission in the National Marine Electronics Association standard format by Networked Transport of Radio Technical Commission for Maritime Services via Internet Protocol (NTRIP) has been designed and developed. The GNSS receiver after development is loaded with program code written in the C# programming language, using the Arduino programming tool. Second, the GNSS receivers have the centimeter accuracy for RTK positioning used in surveying and mapping based on U-blox's mainboard technology and some other modules. These modules are also connected together according to a standard design scheme and assembled in an enclosure to form a complete GNSS receiver. The evaluation results show that the designed and developed GNSS receivers completely meet the requirements of surveying and mapping in coal mines in Vietnam, such as real-time monitoring of landslides, surveying and topographical mapping and other surveying works to serve the mining process.
Źródło:
Inżynieria Mineralna; 2021, 2; 391--404
1640-4920
Pojawia się w:
Inżynieria Mineralna
Dostawca treści:
Biblioteka Nauki
Artykuł
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