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Wyszukujesz frazę "Nguyen, V." wg kryterium: Autor


Tytuł:
Development of Solution for Safe Ship Considering Seakeeping PERformance
Autorzy:
Yoon, H.K.
Nguyen, V.M.
Nguyen, T.T.
Powiązania:
https://bibliotekanauki.pl/articles/116617.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
seakeeping
seakeeping performance
safe ship
safe ship considering
optimal weather routing
container ship
Dynamic Programming (DP)
Changwon National University (CWNU)
Opis:
In recent years, safety of a ships has become one important issues needed to solved as soon as possible in ship navigation. Optimal weather routing is one of best solution for ensuring safe operation of a ship with a with short passage time or minimum energy to avoid a certain excessive motion. This paper introduced the development of solution for safety and optimal weather routing a ship considering seakeeping performance based on model test result. This study introduced how to apply A* algorithm based on result of the seakeeping model test for determining the optimal ship routes. Seakeeping model test of 8600 TEU container ship was carried out in Changwon National University's seakeeping basin and its RAOs at various frequencies were used to predict the RMS motion values in irregular waves. The specially modelled path-cost function and the safety constraints were proposed for finding the optimal path of the ship. The comparison of ship performances estimated by great circle’s path and estimated optimal route during the voyage of the ship was investigated.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2018, 12, 3; 517-525
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Luminescence Spectra of ZnAl$\text{}_{2}$O$\text{}_{4}$:Cr$\text{}^{3+}$ Spinel Nanopowders
Autorzy:
Luc, H. H.
Nguyen, T. K.
Nguyen, V. M.
Suchocki, A.
Kamińska, A.
Le, V. K.
Nguyen, V. H.
Luong, T. T.
Powiązania:
https://bibliotekanauki.pl/articles/2037040.pdf
Data publikacji:
2003-12
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.60.-b
72.80.Ga
81.05.Je
81.05.Mh
Opis:
The synthetic ZnAl$\text{}_{2}$O$\text{}_{4}$ spinels doped with Cr$\text{}^{3+}$ ions are prepared from ZnSO$\text{}_{4}$, Al$\text{}_{2}$(SO$\text{}_{4}$)$\text{}_{3}$, and Cr$\text{}_{2}$(SO$\text{}_{4}$)$\text{}_{3}$. The spinel single phase is detected from X-ray diffraction. Luminescence properties of Cr$\text{}^{3+}$ in ZnAl$\text{}_{2}$O$\text{}_{4}$ were studied by low temperature luminescence and decay measurements. Four luminescence lines at 14570, 14520, 14460, and 14330 cm$\text{}^{-1}$ were found to originate from structure distortion and the line at 14175 cm$\text{}^{-1}$ - from chromium pairs. The broad emission band at about 13540 cm$\text{}^{-1}$ is considered to arise from a new Cr$\text{}^{3+}$ center in ZnCr$\text{}_{2}$O$\text{}_{4}$.
Źródło:
Acta Physica Polonica A; 2003, 104, 6; 581-587
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Femtosecond Optical Breakdown as a Source of the Extreme States of Matter
Autorzy:
Janulewicz, K.
Rehman, Z.
Nguyen, V.
Le, N.
Tran, K.
Grigorov, Y.
Powiązania:
https://bibliotekanauki.pl/articles/1030649.pdf
Data publikacji:
2018-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
79.20.Eb
64.60.A-
47.40.Nm
Opis:
It is well known that from the two fundamental thermodynamic parameters pressure p is much more efficient in transformation of the matter state than temperature T. Optical breakdown in a form of microexplosion proved to be a simple, cheap, and efficient source of transient extreme pressure and temperature. Our interest is focused on the breakdown performed with femstosecond laser pulses both on a surface and in the bulk of material. The paper delivers some examples of the transformation effects observed mostly in the transparent dielectrics under irradiation with femtosecond laser pulses.
Źródło:
Acta Physica Polonica A; 2018, 133, 2; 292-295
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modeling of Spatial Solitons in Twisted Nematics Waveguides
Autorzy:
Karpierz, M. A.
Brzdąkiewicz, K. A.
Nguyen, Q. V.
Powiązania:
https://bibliotekanauki.pl/articles/2035666.pdf
Data publikacji:
2003
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.65.Wi
42.70.Df
Opis:
Theoretical analysis of light beam propagation in twisted nematic liquid crystalline waveguides is presented. Due to the optical reorientation nonlinearity, the light beam changes the direction of propagation and optical spatial soliton is formed. Modeling of such behavior is presented by using (2+1)-dimensional vector beam propagation method as well as simplified (1+1)-dimensional method. Although both approaches give similar results, the differences are discussed in detail.
Źródło:
Acta Physica Polonica A; 2003, 103, 2-3; 169-175
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
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:
Enhancing emotional engagement through relational contracts, management receptiveness, and employee commitment as a stimulus for job satisfaction and job performance in the public sector
Autorzy:
Nguyen, Phuong V.
Nguyen, Loi Tan
Doan, Khanh Ngoc Van
Tran, Hoa Quynh
Powiązania:
https://bibliotekanauki.pl/articles/22444351.pdf
Data publikacji:
2021
Wydawca:
Instytut Badań Gospodarczych
Tematy:
emotional engagement
job satisfaction and performance
relational contract
management receptiveness
employee communication
PLS-SEM
public sector
Opis:
Research background: In the private sector and on social media, corporate emotional interaction has lately become a hot topic. In the background of the public sector, however, it has scarcely been discussed and very little is known about its determinants and implications. Purpose of the article: This research investigates the role of organizational emotional engagement through relational contracts, senior management receptivity, and upward communication of employees in the public sector in stimulating work satisfaction and job efficiency. Methods: This research was based on data collected between April 1, 2020, and May 31, 2020, from 335 state employees from various governmental organizations in Ho Chi Minh City (HCMC), Vietnam. To evaluate the hypothesized model, partial least squares-structural equation modeling was used. Findings & value added: Our results illustrate that relational contracts have a powerful effect on emotional engagement. Positive relationships were confirmed between employee engagement and the voice of employees and between employee engagement and job performance. Moreover, the findings also support the role of senior management receptiveness in stimulating organizational emotional engagement. This study addresses questions about absence of academic studies on organizational emotional engagement in the public sector. The results highlight the important role of emotional engagement in stimulating job satisfaction and job performance through relational contracts, senior management receptiveness, and upward employee communication.
Źródło:
Equilibrium. Quarterly Journal of Economics and Economic Policy; 2021, 16, 1; 203-224
1689-765X
2353-3293
Pojawia się w:
Equilibrium. Quarterly Journal of Economics and Economic Policy
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:
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:
Numerical modeling of open pit (OP) to underground (UG) transition in coal mining
Autorzy:
Nguyen, P. M. V.
Niedbalski, Z.
Powiązania:
https://bibliotekanauki.pl/articles/178661.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
coal mining
numerical modeling
transition from OP to UG
surface deformation
Opis:
The primary objective of the present paper is an attempt at evaluating the influence of sub-level caving operations on the slope stability of a still-functioning open pit coal mine in Vietnam. Initially, various methods of predicting the impact of under- ground mining on surface stability are discussed. Those theoretical considerations were later utilized in the process of constructing a Flac-2D-software-based numerical model for calculating the influence of underground operation on the deformation and possible loss of stability of an open pit slope. The numerical analysis proved that the values of open pit slope displacements were affected mainly by underground exploitation depth, direction of operation (i.e., from one slope to the other) and the distance from the slope plane. Real geomechanical strata parameters from the Vietnamese coal basin of Cam Pha were used in the modeling process. The paper is, therefore, a critical review of the hitherto proposed methods of predicting the impact of underground operation (UG) on open pit mining (OP), illustrated with selected examples of case studies on OP-UG interaction, followed by an original experiment based on numerical modeling method. This is first such study for the genuine conditions of the coal mining in Vietnam. The obtained results, however, should not be generalized due to a highly specific character of the analyzed phenomenon of mining-induced surface deformation. The practical implications of the study may occur extremely useful in the case of an UG-OP transition. Such a transition is often necessary for both technical and economical reasons, as in some coal basins open pit operations at greater depths occur unfeasible, which calls for a proper selection of parameters for a planned underground operation.
Źródło:
Studia Geotechnica et Mechanica; 2016, 38, 3; 35-48
0137-6365
2083-831X
Pojawia się w:
Studia Geotechnica et Mechanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Gaze-J2K: gaze-influenced image coding using eye trackers and JPEG 2000
Autorzy:
Nguyen, A.
Chandran, V.
Sridharan, S.
Powiązania:
https://bibliotekanauki.pl/articles/309070.pdf
Data publikacji:
2006
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
eye tracking
image compression
importance map
JPEG 2000
region of interest
Opis:
The use of visual content in applications of the digital computer has increased dramatically with the advent of the Internet and world wide web. Image coding standards such as JPEG 2000 have been developed to provide scalable and progressive compression of imagery. Advances in image and video analysis are also making human-computer interaction multi-modal rather than through the use of a keyboard or mouse. An eye tracker is an example input device that can be used by an application that displays visual content to adapt to the viewer. Many features are required of the format to facilitate this adaptation, and some are already part of image coding standards such as JPEG 2000. This paper presents a system incorporating the use of eye tracking and JPEG 2000, called Gaze-J2K, to allow a customised encoding of an image by using a user's gaze pattern. The gaze pattern is used to automatically determine and assign importance to fixated regions in an image, and subsequently constrain the encoding of the image to these regions.
Źródło:
Journal of Telecommunications and Information Technology; 2006, 1; 3-10
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cultural characteristics and cordycepin production of some Cordyceps militaris strains under artificial cultivation conditions
Autorzy:
Nguyen, L.T.
Le, V.V.
Nguyen, B.T.T.
Ngo, N.X.
Nguyen, H.T.T.
Nguyen, Q.D.
Mulla, S.
Powiązania:
https://bibliotekanauki.pl/articles/2096987.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Cordyceps militaris
mycelial
fruiting body
cordycepin
Opis:
Cordyceps militaris, a precious medical mushroom, has attracted wide attention in industrial fields. Currently, the degeneration phenomenon of C. militaris commercial strains is amongst the major challenges for cultivation at the industrial scale. The screening for superior strains with high yield and medicinal value is considered a realistic approach to overcome degeneration problems. In the present study, the mycelial growth, primordia formation, yield performance, and cordycepin content of five strains (DT1, DT2, DT3, DT4, and DT5) under artificial cultivation conditions were investigated. All strains showed mycelial growth on SDAY and liquid medium. The strains were successfully cultivated in brown rice medium and required 18 (strain DT3) to 25 days (strain DT5) to form primordia. Additionally, morphological characteristics of fruiting bodies varied among the strains. Strains DT4 and DT3 exhibited the highest fruiting body length with 74.23 ± 5.13 mm and 72.63 ± 2.62 mm, respectively whereas the highest diameter was recorded for strains DT1 (4.05 ± 0.18 mm) and DT2 (3.63 ± 0.12 mm). Of note, among the investigated strains, strain DT3 exhibited the highest biological efficiency (8.95 ± 0.07%) and cordycepin content (1.68 mg/g). Therefore, strain DT3 could be selected as a potential strain for commercial cultivation.
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2020, 101, 2; 135-145
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
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:
Movability and limits of polyhedra
Autorzy:
Laguna, V.
Moron, M.
Nguyen, Nhu
Sanjurjo, J.
Powiązania:
https://bibliotekanauki.pl/articles/1208564.pdf
Data publikacji:
1993
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Opis:
We define a metric $d_S$, called the shape metric, on the hyperspace $2^X$ of all non-empty compact subsets of a metric space X. Using it we prove that a compactum X in the Hilbert cube is movable if and only if X is the limit of a sequence of polyhedra in the shape metric. This fact is applied to show that the hyperspace $(2^ℝ^2}, d_S)$ is separable. On the other hand, we give an example showing that $2^ℝ^2}$ is not separable in the fundamental metric introduced by Borsuk.
Źródło:
Fundamenta Mathematicae; 1993, 143, 3; 191-201
0016-2736
Pojawia się w:
Fundamenta Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cuckoo search algorithm for optimal placement and sizing of static var compensator in large-scale power systems
Autorzy:
Nguyen, K. P.
Fujita, G.
Dieu, V. N.
Powiązania:
https://bibliotekanauki.pl/articles/91782.pdf
Data publikacji:
2016
Wydawca:
Społeczna Akademia Nauk w Łodzi. Polskie Towarzystwo Sieci Neuronowych
Tematy:
Cuckoo search algorithm
optimal placement and sizing
shunt VAR compensator
optimal power flow
FACTS
Opis:
This paper presents an application of Cuckoo search algorithm to determine optimal location and sizing of Static VAR Compensator. Cuckoo search algorithm is a modern heuristic technique basing Cuckoo species’ parasitic strategy. The L´evy flight has been employed to generate random Cuckoo eggs. Moreover, the objective function is a multiobjective problem, which minimizes loss power, voltage deviation and investment cost of Static VAR Compensator while satisfying other operating constraints in power system. Cuckoo search algorithm is evaluated on three case studies and compared with the Teaching-learning-based optimization, Particle Swarm optimization and Improved Harmony search algorithm. The results show that Cuckoo search algorithm is better than other optimization techniques and its performance is also better.
Źródło:
Journal of Artificial Intelligence and Soft Computing Research; 2016, 6, 2; 59-68
2083-2567
2449-6499
Pojawia się w:
Journal of Artificial Intelligence and Soft Computing Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Erosion and deposition processes from field experiments of hydrodynamics in the coastal mangrove area of Can Gio, Vietnam
Autorzy:
Nguyen, H.T.L.
Luong, H.P.V.
Powiązania:
https://bibliotekanauki.pl/articles/48128.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
hydrodynamics
erosion process
depositional process
field experiment
mangrove area
suspended sediment concentration
Can Gio area
Vietnam
Źródło:
Oceanologia; 2019, 61, 2
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł

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