Tạp chí Phát triển Khoa học và Công nghệ Đại học Quốc gia Thành phố Hồ Chí Minh
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A program for establishing the relationship between failure stream parameters and working time of details with sudden failure and determining their optimized repair cycles with considering the repair costs
Tạp chí Phát triển Khoa học và Công nghệ Đại học Quốc gia Thành phố Hồ Chí Minh - Tập 18 Số 4 - Trang 117-125 - 2015
The paper presents the process of building a computer program to establish the
relationship between failure stream parameters and working time of details with
sudden failure; determining their optimized repair cycles with considering the
cost of the planned repair and sudden repair
Density functional theory insights into the bonding of CH3OH and CH3O with Ir(111) surface
Tạp chí Phát triển Khoa học và Công nghệ Đại học Quốc gia Thành phố Hồ Chí Minh - Tập 24 Số 1 - Trang 833-839 - 2021
Introduction: Understanding the adsorption characteristics of CH3OH and CH3O on
the noble metal surfaces is essential for designing better catalysts for the
on-board production of hydrogen from CH3OH. This study aims to provide insights
into the adsorption behavior of these molecules on Ir(111) surface. Methods: The
adsorption structure, the adsorption energy, and the bonding mechanism of CH3OH
an...
#Ir(111) #CH3OH #CH3O #adsorption #bonding #charge transfer #DFT
Topic based object Influence analysis in Social networks
Tạp chí Phát triển Khoa học và Công nghệ Đại học Quốc gia Thành phố Hồ Chí Minh - Tập 16 Số 4 - Trang 68-78 - 2013
In this article, we focus on researching models in social networks analysis and
use them to develop the system which enables users to exactly find topics as
well as necessary research of authors. In this research, we study Author –
Conference – Topic (ACT) model to find out the topic relevant to users’
requirements. With each of these topics, the system will create a graph of
Topical Affinity Prop...
SET UP A SCREENING PROTOCOL FOR ANTIMITOTIC ACTIVITIES OF PLANT EXTRACTS
Tạp chí Phát triển Khoa học và Công nghệ Đại học Quốc gia Thành phố Hồ Chí Minh - Tập 7 Số 7 - Trang 43-47 - 2021
We set up a protocol to screen and determine antimitotic activities of plant
extracts. The two-step protocol consists of: (1) screening of active substances
through cytotoxic effect in Artemia saline, (2) antimitotic effect determination
on human tumour cell lines. Applied on two plant substances, gossypol and
plumbagin, the protocol shows close relationship between results obtained in the
two ste...
SONOCHEMICAL SYNTHESIS OF BIODIESEL FROM CATFISH FAT
Tạp chí Phát triển Khoa học và Công nghệ Đại học Quốc gia Thành phố Hồ Chí Minh - Tập 12 Số 3 - Trang 51-61 - 2020
Biodiesel was prepared from catfish fat by alkaline-catalyzed
transesterification with methanol. Using ultrasonic irradiation considerably
sped up the transesterification and the phase separation as well as reduced
by-product formation in the product in comparison with the heat-chemical method.
The basis factors, such as content of catalysts, reaction time, dissolved time
of catalyst in methanol, ...
Study on growth and lipid biosynthesis of microalgae strains isolated in Vietnam
Tạp chí Phát triển Khoa học và Công nghệ Đại học Quốc gia Thành phố Hồ Chí Minh - Tập 17 Số 2 - Trang 15-26 - 2014
Microalgal biodiesel is considered an alternative to fossil fuel and also
potentially reduce the introduction of new CO2 by displacing fossil hydrocarbon
fuels. Nowadays, researching on renewable energy is mainly focus on biodiesel
from microalgae due to their fast growth rates and high-yield production. In
order to improve this field in Vietnam, we isolated some local species and used
rapid scree...
THE NEW RELATIONSHIP BETWEEN IMAGE FEATURES AND LOSSY CODING PERFORMANCE
Tạp chí Phát triển Khoa học và Công nghệ Đại học Quốc gia Thành phố Hồ Chí Minh - Tập 5 Số 11 - Trang 48-56 - 2021
Nowadays, we need to compress and decompress many types of images such as
natural, PC integrated, medical ones ... Depending on the characteristic of
images, PSNR values can vary up to 30 dB with the same lossy coder. How to
establish a new relationship between the features of different types of images
and the lossy coding performance PSNR? In this paper, we introduce some measures
of image charac...
Characterization of the silver thin films produced at different substrate temperatures
Tạp chí Phát triển Khoa học và Công nghệ Đại học Quốc gia Thành phố Hồ Chí Minh - Tập 22 Số 4 - Trang 356-364 - 2019
Introduction: In recent decades, the antimicrobial surfaces/coating properties
towards a longlasting microbicidal effect have drawn enormous attention by
researchers, they have been developed and used in a wide variety of high-touch
hospital devices as a potential approach. Methods: In this work, Ag NPs was
synthesized by sputtering method at the different annealing temperatures of
100◦C, 200◦C, 3...
#Silver nanoparticles #antibacterial mechanism #vacuum deposition techniques #toxicity
Application of swat model in assesment water resources of upper stream of Thi Nai lagoon serving sustainable develoment of Binh Dinh province
Tạp chí Phát triển Khoa học và Công nghệ Đại học Quốc gia Thành phố Hồ Chí Minh - Tập 17 Số 2 - Trang 109-123 - 2014
Water resources from Kôn and Hà Thanh river basin, upstream areas of Thi Nai
lagoon plays a very essential role on hydrological in economic – social
development of Binh Dinh province. Assessment of potential water resources in
the region can be servered for water resources planning toward sustainable
development. In this paper, the SWAT model was applied in this study to evaluate
river flow in the...
An approximate Hahn-Banach-Lagrange theorem
Tạp chí Phát triển Khoa học và Công nghệ Đại học Quốc gia Thành phố Hồ Chí Minh - Tập 19 Số 4 - Trang 169-177 - 2016
In this paper, we proved a new extended version of the Hahn-Banach-Lagrange
theorem that is valid in the absence of a qualification condition and is called
an approximate Hahn-Banach-Lagrange theorem. This result, in special cases,
gives rise to approximate sandwich and approximate Hahn-Banach theorems. These
results extend the Hahn-Banach-Lagrange theorem, the sandwich theorem in [18],
and the ce...
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