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Quang Vang DANG(Quang Vang DANG ),Viet Thanh Truc TRAN(Viet Thanh Truc TRAN ),Hieu PHAM(Hieu PHAM ),Van Nam MAI(Van Nam MAI ),Quoc Duy VUONG(Quoc Duy VUONG ) 한국유통과학회 2023 The Journal of Asian Finance, Economics and Busine Vol.10 No.2
This paper investigates the determinants of credit accessibility and the effect of credit on the income of farm households borrowing from Vietnam Bank for Agriculture and Rural Development, Giong Rieng District Branch, Kien Giang Province. Based on the primary data of 200 farming households who are the customer of the bank, the study applied the Probit regression model to examine determinant factors of credit accessibility of farm households and employed the Propensity score matching method to investigate the impact of credit on households’ income. The findings of the Probit regression shown that three independent variables that significantly influence the access to credit of households are household size, income source, and farm size. Besides that, the Propensity score matching method results showed a difference of 23.799 million VND/year between the income of borrowing households and that of non-borrowing households at the significance level of 1%. The difference in the imcome from the interval and central matching methods are VND 24.700 million VND/year and VND 24.633 million VND/year, respectively. Given empirical findings suggetsted that several recommendations to increase the credit accessibility of farm households, thereby creating favorable conditions for improving their income.
( Pham Quang ),( Do Minh Nghiep ) 대한금속재료학회(구 대한금속학회) 2016 대한금속·재료학회지 Vol.54 No.3
The plastic deformation behavior of pure Ti during equal channel angular pressing (ECAP) is simulated using the three-dimension finite volume method and is experimentally investigated. The calculated effective strain and effective stress distributions and histories are analyzed to understand the local and global deformation characteristics. The predicted plastic deformation behavior of the Ti workpiece during the ECAP process was compared with the theoretical total strain for every pass at RAM speed v of 10 mm/s and at constant temperature of 400 ℃. The simulated strain and stress distributions are homogenous in the central region of the ECAP processed Ti. The experimental ECAP performed with four, eight, and twelve passes at 400 ℃ results in refined grain sizes of approximately 5-10 μm, 0.4-0.5 μm and 0.1-0.2 μm, respectively.
2P-390 Stabilization of Cathode-Electrolyte Interface in a High-Voltage Lithium-ion Battery
( Pham Quang Hieu ),( Hee-yeol Lee ),( Young-gil Kwon ),( Eui-hyeong Hwang ),송승완 한국공업화학회 2017 한국공업화학회 연구논문 초록집 Vol.2017 No.1
Li-rich and Mn-rich layered oxide cathode material is known to deliver high specific capacities ≥ 250 mAhg<sup>-1</sup> on the high-voltage operation above 4.6 V vs. Li/Li<sup>+</sup> by de-intercalating more number of Li<sup>+</sup> ion. This point makes this material as a promising cathode active material for advanced high-energy density Li-ion batteries. The limited anodic instability of conventional carbonate-based organic electrolytes above 4.2 V vs. Li/Li<sup>+</sup> however makes the attainment of high-capacity difficult. To mitigate the anodic instability problem of conventional electrolyte, we have been developing new high-voltage electrolyte components to stabilize high-voltage interface between Li-rich layered oxide cathode and electrolyte. Studies of high-voltage electrochemical processes and cathode-electrolyte interfacial phenomena and their relations to cycling performance would be discussed.
Pham, Quang Nghia,Trinh, Kieu The Loan,Tran, Nguyen Khoi Song,Park, Tae-Sik,Lee, Nae Yoon The Royal Society of Chemistry 2018 The Analyst Vol.143 No.23
<P>We fabricate a three-dimensional (3D) microdevice operated with minimal peripheral accessories, including a portable pump for semi-automated sample delivery and a single heater for temperature control, for performing reverse transcription polymerase chain reaction (RT-PCR) integrated with a downstream fluorescence detection module for semi-quantitative assessment of gene expression. The microdevice was fabricated by wrapping a polytetrafluoroethylene (PTFE) tube around a pre-designed polycarbonate mold to create a seamless microchannel for both the reverse transcription (RT) of RNA and the amplification of complementary DNA. In addition, a silicone tube, which underwent a two-step surface modification mediated by polyethyleneimine and glutaraldehyde coating, was connected at the outlet to capture amplicons downstream of the PTFE tube for on-site fluorescence detection. This fabrication method enabled continuous-flow RT-PCR (CF RT-PCR) using the 3D CF RT-PCR microdevice as a reactor, a single heater for the temperature control of both RT and PCR processes, and a disposable plastic syringe for semi-automated sample delivery. The microdevice was successfully implemented for the identification of the β-actin gene, a constitutively expressed gene in all cells, and the sphingosine-1-phosphate lyase 1 gene, a potential pharmacological target gene in the diagnosis of cancer, diabetes, and atherosclerosis. This portable integrated microdevice offers a potential approach towards preliminary studies of gene expression and identification of RNA viruses.</P>
Preparation of the Transparent Conductive ZnO Nano Material by Means of Pulsed Spray Pyrolysis
Pham Hoang Ngan,Nguyen Quang Tien,Do Thanh Dat,Pham Van Nho 한국물리학회 2008 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.52 No.5
Transparent conductive ZnO lms play an important role in nano science and nanotechnology. Many methods have had various successes in preparing ZnO. In this contribution, we present some results from using a pulsed spray method and subsequent annealing in a hydrogen atmosphere for the preparation of transparent conductive ZnO films. The performances of ZnO produced by using various precursors and in various technology conditions were investigated. We attained ZnO films with sheet resistances below 100 and an average transparency of about 80 % in the visible region of the light spectrum. Those values are of the same magnitude as ones prepared by using other methods. The mechanism of annealing effect in a hydrogen environment is discussed. Transparent conductive ZnO lms play an important role in nano science and nanotechnology. Many methods have had various successes in preparing ZnO. In this contribution, we present some results from using a pulsed spray method and subsequent annealing in a hydrogen atmosphere for the preparation of transparent conductive ZnO films. The performances of ZnO produced by using various precursors and in various technology conditions were investigated. We attained ZnO films with sheet resistances below 100 and an average transparency of about 80 % in the visible region of the light spectrum. Those values are of the same magnitude as ones prepared by using other methods. The mechanism of annealing effect in a hydrogen environment is discussed.
Pham Quang Vu,Jong-Taek Oh 대한설비공학회 2019 대한설비공학회 학술발표대회논문집 Vol.2019 No.-
Two-phase flow pressure drop measurements were made during the condensation process with four refrigerants R32, R410A, R290 and R1234yf at the saturation temperature of 48℃ in a horizontal multiport mini-channel tube. The experimental work is carried outin a test apparatus which the variation mass flux of 50 to 500kg/m2s and mass flux of 3 to 12 kW/m2. The results showed that the two-phase pressure drop is higher at a higher mass flux and vapor quality, but insignificant for the raising of heat flux. Based on the experimental data, a correlation equation was proposed for the two-phase pressure drop.