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    Wyświetlanie 1-18 z 18
    Tytuł:
    Quality Information and Quality Performance: Roles of Process Control as a Mediator and Shop Floor Leadership as a Moderator
    Autorzy:
    Anh, Nguyen Ngoc
    Phan, Anh Chi
    Thoa, Pham Thi Xuan
    Matsui, Yoshiki
    Powiązania:
    https://bibliotekanauki.pl/articles/2023958.pdf
    Data publikacji:
    2021-12
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    total quality management
    leadership
    quality performance
    high performance
    Opis:
    This study investigates (1) the effect of quality information on quality performance through process control and (2) the moderating role of shop floor leadership on the relationship between quality information and quality performance in the context of manufacturing plants on a global basis. The moderated mediation analysis with a bootstrapping approach was employed to analyse data for hypotheses testing. The data is from the fourth-round dataset of the High- Performance Manufacturing Project, collected from manufacturing plants worldwide. The results indicate that (1) quality information is positively associated with quality performance through process control, and (2) shop floor leadership (i.e., supervisory interaction facilitation) positively moderates the indirect effect of quality information on quality performance; that is, the shop floor leadership practice strengthens the effect of quality information on quality performance through process control. This study also has a practical implication for top managers who should consider the vital role of leadership practices adopted by shop floor supervisors in implementing total quality management practices and should raise awareness that leadership practices are not only for the ‘C-suite’ but also for shop floor supervisors.
    Źródło:
    Management and Production Engineering Review; 2021, 14, 4; 13-26
    2080-8208
    2082-1344
    Pojawia się w:
    Management and Production Engineering Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Numerical investigation of length to beam ratio effects on ship resistance using ranse method
    Autorzy:
    Le, Tat Hien
    Nguyen, Duy Anh
    Tran, Ngoc Tu
    Hoa, Nguyen Thi Ngọc
    Ngoc, Vu Minh
    Powiązania:
    https://bibliotekanauki.pl/articles/32917972.pdf
    Data publikacji:
    2023
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    length-beam ratio
    L/B
    resistance
    hull form
    RANSE
    Opis:
    The paper discusses the length to beam (L/B) ratio effects on ship resistance at three different Froude numbers using unsteady RANSE simulation. First, the JBC ship model was used as an initial hull form for verification and validation of predicted ship resistance results with measured data, and then the influence of the L/B ratio on ship resistance was carried out. Ship hull forms with different L/B ratios were produced from the initial one by using the Lackenby method. The numerical results obtained show the L/B ratio’s effect on ship resistance. Increases of the L/B ratio led to gradual reduction of the total ship resistance and vice versa. Analysis of the changing of the resistance components indicates that the pressure resistance changes are considerably larger than the frictional one. Finally, the paper analyses the difference in the flow field around the hull of the ship with variation of the L/B ratio to fully understand the physical phenomenon in the change of ship resistance at different L/B parameters.
    Źródło:
    Polish Maritime Research; 2023, 1; 13-24
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    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:
    Multi-objective optimization for weld track geometry in wire-arc directed energy deposition of ER308L stainless steel
    Autorzy:
    Nguyen, Van Canh
    Le, Van Thao
    Pham, Ngoc-Linh
    Nguyen, Anh-Thang
    Powiązania:
    https://bibliotekanauki.pl/articles/24084674.pdf
    Data publikacji:
    2023
    Wydawca:
    Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
    Tematy:
    wire-arc directed energy deposition
    weld track
    ER308L stainless steel
    multi-objective optimisation
    Opis:
    In this research, the weld track geometry in wire-arc DED (directed energy deposition) of ER308L stainless steel was predicted and optimized. The studied geometrical attributes of weld tracks include weld track width (WTW), weld track height (WTH), and contact angle (α). The experiment was designed based on Taguchi method with three variables (current I, voltage U, and weld velocity v) and four levels for each variable. The ANOVA was adopted to evaluate the accuracy of the models and impact levels of variables on the responses. The TOPSIS method was utilized to predict the optimal variables. The results indicated that the predicted models were built with high accuracy levels (R2 = 98.92%, 98.77%, and 98.91% for WTW, WTH, and α, respectively). Among the studied variables, U features the highest effects on WTW and α with 78.56% and 69.90% of contribution, respectively, while v is the variable that has the most impact on WTH with 39.82% of contribution. The optimal variables predicted by TOPSIS were U = 23 V, I = 140 A, and v = 300 mm/min, which allows building components with stable and regular geometry.
    Źródło:
    Journal of Machine Engineering; 2023, 23, 2; 123--134
    1895-7595
    2391-8071
    Pojawia się w:
    Journal of Machine Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Facies Analysis and Depositional Environmental Interpretation of The Upper Oligocene, Block 09- 2/10, Cuu Long Basin
    Autorzy:
    Nguyen, Muoi Duy
    Le, Anh Ngoc
    Nguyen, Hoa Minh
    Bui, Ngan Thi
    Powiązania:
    https://bibliotekanauki.pl/articles/27323232.pdf
    Data publikacji:
    2023
    Wydawca:
    Polskie Towarzystwo Przeróbki Kopalin
    Tematy:
    Cuu Long basin
    upper oligocene
    depositional environment
    seismic facies
    block 09-2/10
    Oligocen
    Wietnam
    sejsmika
    środowisko
    Opis:
    The article presents the facies and environment of the Upper Oligocene sediments in the area of block 09-2/10 based on the analysis of seismic facies and well data of the neighboring areas. The results of the interpretation of seismic data indicate that the upper Oligocene sediments are limited by the top C, top D seismic reflectors. The environment is formed from lagoons, lakes to deep lakes. Seismological facies analysis identified 03 facies including seismic facies with medium to poor reflection amplitude, medium continuous, low frequency reflecting the lacustrine sediments (80%) in most of the lake center. Strong reflective seismic facies, sigmoidal clinoforms reflect the lakeside sediments (15%) distributed in the lakeside shelf. The seismic facies with average and continuous amplitude poorly reflect alluvial sediments (5%) in the Northwest region. The direction of sediment transport is mainly from the Northwest and Southwest in the area. The sandstone sequences are distributed on the slopes of the lake and the lake bottom, which is potential reservoir.
    Źródło:
    Inżynieria Mineralna; 2023, 2; 155--162
    1640-4920
    Pojawia się w:
    Inżynieria Mineralna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Geological Controls on Evolution of Submarine Channels in Song Hong Basin, Offshore Vietnam
    Autorzy:
    Le, Anh Ngoc
    Nguyen, Hoan Minh
    Nguyen, Muoi Duy
    Thi, Ngan Bui
    Powiązania:
    https://bibliotekanauki.pl/articles/24200703.pdf
    Data publikacji:
    2023
    Wydawca:
    Polskie Towarzystwo Przeróbki Kopalin
    Tematy:
    Song Hong basin
    submarine channels
    channel complex
    3D seismic
    Opis:
    Song Hong basin is a very large basin with complicated onshore to offshore geological structure. The basin comprises the pre-Tertiary basement and Kainozoi sequences. This study focused on the evolution of submarine channel in Miocene sequence. The study interval is the major reservoir of the basin characterized as submarine channel complex and lower to Middle Miocene carbonates with the porosity of 15–25%. The channel is highly eroded into the substrate with c. 7 km wide and 20 km long, trending northwest-southeast. They are ‘U’ to ‘V’ shape, sub-parallel to deep faults which reactivated in the Early and Mid-Late Miocene. The channel deposit is characterized by cut and fill architecture and can be seen as high amplitude, bi-directional downlap. The channels are likely to be controlled by the two inverted phases in Late Oligocene and Middle-Late Miocene. The tectonic events are not only controls the flow directions but also modified the shape of the channels. The occurrence of well-developed submarine channel give a great hydrocarbon potential for the Song Hong basin.
    Źródło:
    Inżynieria Mineralna; 2023, 2; 7--12
    1640-4920
    Pojawia się w:
    Inżynieria Mineralna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of High–resolution Reflection Seismic Attributes for Researching 3D Shallow Marine Geology Structures
    Zastosowanie atrybutów sejsmicznych odbić o wysokiej rozdzielczości do badania struktur 3D płytkiej geologii morskiej
    Autorzy:
    Le, Cuong Van Anh
    Duong, Man Ba
    Nguyen, Thuan Van
    Nguyen, Truong Ngoc
    Powiązania:
    https://bibliotekanauki.pl/articles/2201256.pdf
    Data publikacji:
    2023
    Wydawca:
    Polskie Towarzystwo Przeróbki Kopalin
    Tematy:
    high-resolution seismic
    textural attribute
    bathymetry
    color-blend
    sejsmika wysokiej rozdzielczości
    atrybut tekstury
    batymetria
    mieszanie kolorów
    Opis:
    In river sedimentology and bathymetry study, high–resolution seismic approach equipped with a sub–bottom profiler is necessary. Difference of acoustic impedances resulted by varies of sediment stratigraphy layers can be visualized through dynamic seismic vibration. In marine environments, detection of young sediment as sand dunes or mud, mixtures of sand and clay, and clay formations can help policy makers to launch policies or regulations in safety of water transportation as well as civil building infrastructure. We have measured, analyzed, and interpreted an enormous collection of 2D seismic sub-bottom profiles in Can Gio offshore, Ho Chi Minh City, Vietnam for understanding its shallow subsurface young deposits. Our approach is to combine three key seismic textural attributes (i.e., Correlation, Variance, and Homogeneity) in the representation of color-blended attribute for picking distinguished geological features. In our result, 2D seismic horizons representing boundaries of diverse types of sediments can provide a great input for modeling 3D seabed and distribution of sand, sand-clay mixture, and clay sediments within the interest area. The sand layer useful for mining in this area is strongly affected by channels stemming from Soai Rap river.
    W badaniach sedymentologicznych i batymetrycznych rzek konieczne jest podejście sejsmiczne o wysokiej rozdzielczości wyposażone w profiler poddenny. Różnicę impedancji akustycznych wynikającą ze zmienności warstw stratygraficznych osadów można zwizualizować za pomocą dynamicznych drgań sejsmicznych. W środowiskach morskich wykrywanie młodych osadów, takich jak wydmy lub błoto, mieszanki piasku i gliny oraz formacje gliny, może pomoc decydentom we wprowadzaniu polityk lub przepisów dotyczących bezpieczeństwa transportu wodnego, a także infrastruktury budynków cywilnych. Zmierzyliśmy, przeanalizowaliśmy i zinterpretowaliśmy ogromny zbiór profili sejsmicznych 2D pod dnem w Can Gio na morzu w mieście Ho Chi Minh w Wietnamie, aby zrozumieć jego płytkie, podpowierzchniowe młode złoża. Nasze podejście polega na połączeniu trzech kluczowych atrybutów tekstury sejsmicznej (tj. Korelacji, Wariancji i Jednorodności) w reprezentacji atrybutu mieszania kolorów w celu wybrania wyróżniających się cech geologicznych. W naszym wyniku, poziomy sejsmiczne 2D reprezentujące granice rożnych typów osadów mogą stanowić doskonały materiał wejściowy do modelowania 3D dna morskiego i rozmieszczenia piasku, mieszanki piaskowo-gliniastej i osadów gliniastych w obszarze zainteresowania. Na warstwę piasku przydatnego do wydobycia na tym obszarze duży wpływ mają kanały wychodzące z rzeki Soai Rap..
    Źródło:
    Inżynieria Mineralna; 2023, 1; 175--184
    1640-4920
    Pojawia się w:
    Inżynieria Mineralna
    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
    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
    Artykuł
    Tytuł:
    Two-step Homogenization of Poroelastic Properties of a Limestone
    Dwu-etapowa homogenizacja właściwości poroelastycznych wapienia
    Autorzy:
    Trieu, Hung Truong
    Nguyen, Ngoc Bien
    Pham, Duc Tho
    Vu, Minh Ngoc
    Do, Ngoc Anh
    Nguyen, Sy Tuan
    Tran, Nam Hung
    Nguyen, Thi Thu Nga
    Powiązania:
    https://bibliotekanauki.pl/articles/318822.pdf
    Data publikacji:
    2020
    Wydawca:
    Polskie Towarzystwo Przeróbki Kopalin
    Tematy:
    oolitic limestone
    tow-step homogenization
    CSA
    poro-elastic properties
    differential self-consistent
    wapień oolityczny
    homogenizacja dwuetapowa
    właściwości poroelastyczne
    zróżnicowana spójność własna
    Opis:
    This study aims at deriving the effective poroelastic properties of the oolitic limestones based on the Hashin composite sphere assemblage (CSA) micromechanical theory. The microstructure of oolitic limestones generally exhibits an assemblage of grains (oolites) surrounded by a matrix. Grain and matrix are linked via the interfacial transition zone (ITZ). Pores exist in these three material phases (oolite, ITZ and matrix). A two-step homogenization method is proposed. The first step consists of upscaling the properties of each porous phase (i.e. porous oolite, porous ITZ and porous matrix) in which each phase contains two sub-phases including pore and solid. The differential self-consistent scheme is used for the first step. At the second step, the three different porous constituents (oolite, ITZ and matrix) are assembled in a CSA model. A mathematical analogy between thermoelasticity and poroelasticity is used to obtain the effective poroelastic properties. A comparison between the proposed model and test data on the oolitic limestone from Bourgogne (France) helps to calibrate the model parameters and to highlight the role of ITZ phase.
    W artykule, przedstawiono wyniki badań efektywnych właściwości poroelastycznych wapieni oolitowych w oparciu o teorię mikromechaniczną złożonego zespołu kul Hashin (CSA). Mikrostruktura wapieni oolitycznych wykazuje generalnie zbiór ziaren (oolitów) otoczonych matrycą. Ziarno i matryca są połączone za pośrednictwem międzyfazowej strefy przejściowej (ITZ). W tych trzech fazach materiału (oolit, ITZ i matryca) istnieją pory. Zaproponowano dwuetapową metodę homogenizacji. Pierwszy etap polega na zwiększeniu skali właściwości każdej porowatej fazy (tj. Porowatego oolitu, porowatej ITZ i porowatej matrycy), w której każda faza zawiera dwie podfazy: porową i stałą. W pierwszym etapie zastosowano różnicowy schemat samouzgodnienia. Na drugim etapie trzy różne porowate składniki (oolit, ITZ i matryca) są składane w modelu CSA. Matematyczne analogie między termosprężystością a poroelastycznością są wykorzystywane do uzyskania efektywnych właściwości poroelastycznych. Porównanie proponowanego modelu z danymi testowymi dotyczącymi wapienia oolitycznego z Bourgogne (Francja) pomaga skalibrować parametry modelu i podkreślić rolę fazy ITZ.
    Źródło:
    Inżynieria Mineralna; 2020, 1, 2; 31-39
    1640-4920
    Pojawia się w:
    Inżynieria Mineralna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Numerical Method for the Design of the U-Shaped Segmental Tunnel Lining under the Impact of Earthquakes: A Case Study of a Tunnel in the Hanoi Metro System
    Autorzy:
    Nguyen, Chi Thanh
    Do, Ngoc Anh
    Pham, Van Vi
    Gospodarikov, Alexandr
    Powiązania:
    https://bibliotekanauki.pl/articles/2020136.pdf
    Data publikacji:
    2021
    Wydawca:
    Polskie Towarzystwo Przeróbki Kopalin
    Tematy:
    numerical method
    U-Shaped segmental tunnel lining
    impact of earthquakes
    Hanoi metro system
    wstrząsy
    Wietnam
    metro
    Opis:
    Circular tunnels are usually encountered when excavation tunnel. However, the U-shaped tunnel lining is used a lot in practice because of it’s advantages. However, there are not many studies in the world to calculate and design for underground structures with U-shaped tunnel lining, especially in the case of tunnels being affected by earthquakes. This paper proposes a new numerical-HRM method approach for the analysis of U-shaped segmental tunnel lining under the impact of earthquakes. Hanoi is the capital of Vietnam, this is a big city with more than 8 million people. Hanoi is located between two major fault systems, the Red River fault system and the Son La-Dien Bien-Lai Chau fault system. Therefore, the Hanoi area is assessed as likely to be affected by earthquakes of magnitude Mw = 6.1 up to 6.5 Richter. The Hanoi metro system is constructed by TBM and the U-shaped segmental tunnel lining is also one of the types of tunnel lining considered for use in the construction of metro tunnels in Hanoi. The improved HRM method has been used to investigate the effect of joints in the tunnel lining from the Hanoi system metro under the impact of earthquakes is conducted considering from the results of the tunnel lining behavior in terms of bending moment (M), normal forces (N) and tunnel lining displacements (δn) in both cases: the U-shaped continuous tunnel lining and the U-shaped segmental tunnel lining.
    Źródło:
    Inżynieria Mineralna; 2021, 2; 305--320
    1640-4920
    Pojawia się w:
    Inżynieria Mineralna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Rule-based Classification of Airborne Laser Scanner Data for Automatic Extraction of 3D Objects in the Urban Area
    Autorzy:
    Bui, Ngoc Quy
    Le, Dinh Hien
    Duong, Anh Quan
    Nguyen, Quoc Long
    Powiązania:
    https://bibliotekanauki.pl/articles/2019227.pdf
    Data publikacji:
    2021
    Wydawca:
    Polskie Towarzystwo Przeróbki Kopalin
    Tematy:
    point cloud
    Lidar data
    NDVI index
    classification algorithms
    3D city
    chmura punktów
    indeks NDVI
    algorytm klasyfikacji
    Opis:
    LiDAR technology has been widely adopted as a proper method for land cover classification. Recently with the development of technology, LiDAR systems can now capture high-resolution multispectral bands images with high-density LiDAR point cloud simultaneously. Therefore, it opens new opportunities for more precise automatic land-use classification methods by utilizing LiDAR data. This article introduces a combining technique of point cloud classification algorithms. The algorithms include ground detection, building detection, and close point classification - the classification is based on point clouds’ attributes. The main attributes are heigh, intensity, and NDVI index calculated from 4 bands of colors extracted from multispectral images for each point. Data of the Leica City Mapper LiDAR system in an area of 80 ha in Quang Xuong town, Thanh Hoa province, Vietnam was used to deploy the classification. The data is classified into eight different types of land use consist of asphalt road, other ground, low vegetation, medium vegetation, high vegetation, building, water, and other objects. The classification workflow was implemented in the TerraSolid suite, with the result of the automation process came out with 97% overall accuracy of classification points. The classified point cloud is used in a workflow to create a 3D city model LoD2 (Level of Detail) afterward.
    Źródło:
    Inżynieria Mineralna; 2021, 2; 103--114
    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:
    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
    Artykuł
    Tytuł:
    Numerical study of effect of trim on performance of 12500DWT cargo ship using RANSE method
    Autorzy:
    Chuan, Tran Quoc
    Phuong, Nguyen Kim
    Tu, Tran Ngoc
    Quan, Mai Van
    Anh, Nguyen Duy
    Le, Tat-Hien
    Powiązania:
    https://bibliotekanauki.pl/articles/32891489.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    RANSE
    ship performance
    trim optimisation
    operating condition
    ship speed
    Opis:
    This paper deals with the results of studying the effect of trim on the performance of series cargo ship 12500DWT in full scale at two operating conditions by using the RANSE method. The Body Force Propeller method is used to simulate a rotating propeller behind the ship. The numerical predicted results at the ballast condition were verified and validated with sea trial data. The ship’s engine power curves for different trim conditions at two operating conditions were carried out to produce a data source to evaluate the effect of trim on the performance of the 12500DWT cargo ship. The results indicate that if the ship operates under optimum trim conditions, this can decrease the ship’s engine power in a range from 2.5 to 4.5% depending on different loading conditions and ship speeds. Finally, the paper also provides detailed differences in flow around the ship due to trim variation to explain the physical phenomenon of changing ship performance.
    Źródło:
    Polish Maritime Research; 2022, 1; 3-12
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    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
    Artykuł
    Tytuł:
    Effectiveness of a Mobile Application-Based Intervention to Improve Knowledge and Practice Regarding Silicosis Among High-Risk Workers of Dust Exposure in a Northern Province of Vietnam
    Autorzy:
    Nguyen, Thi Thu Huyen
    Ta, Thi Kim Nhung
    Pham, Thi Quan
    Nguyen, Thanh Thao
    Nguyen, Ngoc Anh
    Nguyen, Thi Lien Huong
    Le, Thi Huong
    Luong, Mai Anh
    Le, Thi Thanh Xuan
    Powiązania:
    https://bibliotekanauki.pl/articles/27323251.pdf
    Data publikacji:
    2023
    Wydawca:
    Polskie Towarzystwo Przeróbki Kopalin
    Tematy:
    knowledge
    practice
    workers
    silicosis
    mobile application
    effectiveness
    praca
    aplikacja mobilna
    Wietnam
    Opis:
    Objectives: to analyze changes in knowledge and practices regarding silicosis in groups of workers at high risk of silicosis before - after an intervention. Methods: The study was conducted from 2018 to 2019 based on structured questions related to knowledge and practices of silicosis of workers directly exposed to silica dust in a Northern province of Vietnam. The mobile app-based intervention was applied to steel workers, then compared with ironworkers in improvements in silicosis knowledge and practices. Results: Significant changes in the intervention group related to workers' knowledge about the signs suggestive of silicosis, disease consequences, measures to reduce the risk of silicosis, and participation in annual occupational disease examinations were reported. Conclusion: Mobile applicationbased interventions could improve silicosis knowledge and practice among workers at high risk of exposure to silica dust.
    Źródło:
    Inżynieria Mineralna; 2023, 2; 295--302
    1640-4920
    Pojawia się w:
    Inżynieria Mineralna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Impact of macro economic factors and financial development on energy projects - case in ASEAN countries
    Autorzy:
    Hanh, Hoang Thanh
    Huy, Dinh Tran Ngoc
    Phuong, Nguyen Thi Thanh
    Nga, Le Thi Viet
    Anh, Pham Tuan
    Powiązania:
    https://bibliotekanauki.pl/articles/1818318.pdf
    Data publikacji:
    2020
    Wydawca:
    Uniwersytet Zielonogórski. Wydział Ekonomii i Zarządzania
    Tematy:
    countries ASEAN
    commerce
    financial development
    energy project
    macroeconomic
    macro politicies
    kraje ASEAN
    handel
    rozwój finansowy
    projekty energetyczne
    makroekonomia
    makropolityka
    Opis:
    ASEAN (The Association of SouthEast Asian Nations) demand on energy is depending on economic growth of each country, resources, and political and regulations of each country. This study aims to investigate the role of international trade, financial development, foreign direct investment (FDI) on the consumption of renewable energy (RE) in ASEAN countries of the world. The findings explore that positive nexus among the international trade, real output, financial development, foreign direct investment and consumption of RE. Last but not least, this paper will propose several recommendations and policy suggestion for ASEAN countries to manage and encourage better renewable energy projects in the region. One of its original value is that, in the globalization and integration era, environment pollution will affect all ASEAN countries and in the region, so these nations need to link together to implement renewable projects for environment protection and for further generation.
    Źródło:
    Management; 2020, 24, 2; 146-157
    1429-9321
    2299-193X
    Pojawia się w:
    Management
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Method of Defining the Parameters for UAV Point Cloud Classification Algorithm
    Metoda wyznaczania parametrów do opracowania metod klasyfikacji danych chmur punktów zbudowanych z obrazów BSP
    Autorzy:
    Bui, Ngoc Quy
    Le, Dinh Hien
    Nguyen, Quoc Long
    Tong, Si Son
    Duong, Anh Quan
    Pham, Van Hiep
    Phan, Thanh Hai
    Pham, Thi Lan
    Powiązania:
    https://bibliotekanauki.pl/articles/318963.pdf
    Data publikacji:
    2020
    Wydawca:
    Polskie Towarzystwo Przeróbki Kopalin
    Tematy:
    UAV
    point cloud
    classification algorithms
    open-pit mines
    BSP
    chmura punktów
    algorytmy klasyfikacyjne
    kopalnie odkrywkowe
    Opis:
    Image data from Drones/Unmanned Aerial Vehicles (UAVs) has been studied and used extensively for establishing maps. The process of UAV data provides three main products including (Digital Surface Model) DSM, Point cloud and Ortho-photos, in which point cloud is a valuable data source in building 3D models and topographic surfaces as well. However, processing point cloud separately to achieve secondary products has not been received much attention from researchers. This study determines parameters to develop a method for classifying point cloud data constructed from UAV images. Consequently, A 3D surface of the ground is built by applying a developed algorithm for the point cloud data for an open-pit mine. The temporal or non-ground objects such as trees, houses, vehicles are automatically subtracted from the point cloud by the algorithms. According to this line, it is possible to calculate and analyze the amount of reserves, the exploited volume to evaluate the efficiency for each mine during operation with the support of UAV integrated camera.
    Dane uzyskane z dronów / bezzałogowych statków powietrznych (BSP) zostały zbadane i powszechnie wykorzystane do opracowania map. Przetwarzanie danych z BSP zapewnia trzy główne produkty, a mianowicie: Model numeryczny powierzchni (MNS), chmurę punktów i ortofotomapy, w których chmura punktów jest cennym źródłem danych przy budowaniu modeli 3D i powierzchni topograficznych. Dotychczas, kwestia przetwarzania chmury punktów osobno w celu uzyskania produktów wtórnych nie wzbudziła większego zainteresowania naukowców. W artykule, przedstawiono wyniki badania nad sposobem wyznaczenia parametrów niezbędnych do opracowania metod klasyfikacji danych chmur punktów zbudowanych z obrazów BSP. W efekcie tego procesu, powstaje trójwymiarowa powierzchnia powierzchni poprzez zastosowanie opracowanego algorytmu dla danych chmury punktów w kopalni odkrywkowej. Na tej podstawie, można służyć do pomiarów inwentaryzacyjnych, bieżącej kontroli zgodności postępu eksploatacji górniczej z planem ruchu zakładu górniczego, prowadzenia pomiarów postępu frontu eksploatacji w złożu oraz frontów, obejmujących proces zdejmowania nadkładu oraz wyeksploatowanego złoża.
    Źródło:
    Inżynieria Mineralna; 2020, 1, 2; 49-56
    1640-4920
    Pojawia się w:
    Inżynieria Mineralna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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