viet quoc - Academia.edu (original) (raw)

Papers by viet quoc

Advances in economics, business and management research, 2023

This article aims to analyze the influence of the Audit Committee (AC) in the organizational stru... more This article aims to analyze the influence of the Audit Committee (AC) in the organizational structure of the joint stock company on the timeliness of the Financial Statements (FS). AC is a new part of the organizational structure of the joint-stock company in Vietnam, which had just been legislated and took effect in 2021. AC aims to inspect and supervise the company's activities to enhance the truthfulness, reasonableness, and timeliness of Financial Statements (FS). Under the effect of the Covid-19 epidemic and the ongoing trade war, the global business environment has become unpredictable in recent years as well as in the coming years. Since then, it has significantly impacted the production and business situation, and the time of publishing FS of companies. A quantitative study method is conducted by collecting data from the year 2017 to 2021 from all listed companies that have established AC. The authors analyzed the impact of Audit Committees on the timing of the FS publication. The results showed that AC with a compact personnel structure has played an active role in improving the timeliness of FS. When the company has an Audit Committee, the probability that FS information is timely published increases by 14.34%. This finding encourages joint-stock companies to examine the provisions of Enterprise Law 2020 when selecting a management structure to enhance the timeliness of financial statement information in the present unpredictable business climate.

- Đặt vấn đề: Rối loạn chuyển hóa khoáng - xương thường gặp ở bệnh thận mạn trong đó tình trạng t... more - Đặt vấn đề: Rối loạn chuyển hóa khoáng - xương thường gặp ở bệnh thận mạn trong đó tình trạng thiếu vitamin D khá phổ biến và có vai trò quan trọng trong điều hòa nội môi cơ thể. Hiện tại còn ít công trình báo cáo về tình trạng thiếu vitamin D và những ảnh hưởng trên xương ở bệnh nhân bệnh thận mạn. - Đối tượng - phương pháp: Thu thập dữ kiện lâm sàng và cận lâm sàng (bao gồm 25 - hydroxyvitamin D huyết thanh) và mật độ xương đo bằng phương pháp DEXA (Dual Energy X-ray Absorptiometry) cho tất cả bệnh nhân được chẩn đoán bệnh thận mạn có độ lọc cầu thận ước tính (e-GFR) dưới 60 ml/phút/1,73m2 da tại khoa Thận - Thận nhân tạo Bệnh viện Trưng Vương từ 08/2020 - 08/2021. - Kết quả: Tổng số 96 bệnh nhân, bệnh nhân nữ là 63 (65,6%), tuổi trung bình: 62,3 ± 10,4 tuổi, chỉ số khối cơ thể (BMI) trung bình: 22,8 ± 3,4 kg/m2 và eGFR trung bình: 10,1 ± 7,3 ml/phút. Bệnh nhân bệnh thận mạn giai đoạn 3 là 13 (13,5%), giai đoạn 4 là 19 (19,8%), giai đoạn 5 có và không có lọc máu là 64 (66,7%). Mức vitamin D huyết thanh trung bình là 21,3 ± 12,6 ng/ml. Bệnh nhân giảm vitamin D máu là 74 (77,1%), trong đó, giảm vitamin D nhẹ là 19 (25,7%), giảm trung bình là 33 (44,6%), giảm nặng là 22 (29,7%). Mật độ xương (BMD - Bone Mineral Density) trung bình vùng cổ xương đùi là 0,725 ± 0,157 g/cm2 thấp hơn vùng cột sống thắt lưng là 0,873 ± 0,201 g/cm2. Bệnh nhân thiếu xương và loãng xương tại vị trí cổ xương đùi so với cột sống thắt lưng lần lượt là 43 (44,8%) và 19 (19,8%) so với 39 (40,6%) và 17 (17,7%). Có mối liên quan có ý nghĩa thống kê giữa mức vitamin D huyết thanh và mật độ xương ở cả hai vị trí: tại cổ xương đùi (hệ số hồi qui: 3,3.10- 3, hệ số xác định: 0,09), tại cột sống thắt lưng (hệ số hồi qui: 5,1.10-3, hệ số xác định: 0,063). - Kết luận: Tình trạng thiếu vitamin D ở bệnh nhân bệnh thận mạn có eGFR < 60 ml/phút/1,73m2 là phổ biến. Có mối liên quan mức độ yếu có ý nghĩa thống kê giữa mức vitamin D huyết thanh và mật độ xương ở cả hai vị trí cổ xương đùi và cột sống thắt lưng. - Background: Mineral and Bone Disorder (MBD) is common in chronic kidney disease (CKD), in which vitamin D deficiency is quite common and plays an important role in body homeostasis. There are currently few studies reporting vitamin D deficiency and its effects on bone in patients with CKD. - Methods: We collected clinical data, laboratory results (including 25 - hydroxyvitamin D serum levels) and BMD measured by DEXA (Dual energy x-ray absorptiometry) of all the patients diagnosed with CKD with eGFR < 60 mL/min/1.73m2 at the Department of Nephrology and Dialysis at Trung Vuong Hospital from 08/2020 - 08/2021. - Results: A total of 96 patients in whom females stood at 63 (65.6%) was included. The mean age were 62.3 ± 10.4 years old; the average BMI were 22.8 ± 3.4 kg/m2 and the mean eGFR is 10.1 ± 7.3 ml/min. The patients with CKD stage 3 was 13 (13.5%), stage 4 was 19 (19.8%), stage 5 with or without dialysis was 64 (66.7%). The mean serum vitamin D level represented 21.3 ± 12.6 ng/ml. Hypovitaminosis D happened in 74 (77.1%) cases, in which, slight reduction was 19 (25.7%), average reduction was 33 (44.6%), severe reduction was 22 (29.7%). The mean BMD in the femoral neck area became 0.725 ± 0.157 g/cm2 lower than the lumbar spine region which was 0.873 ± 0.201 g/cm2. The patients with osteopenia and osteoporosis at the femoral neck relative to the lumbar spine were 43 (44.8%) and 19 (19.8%) compared with 39 (40.6%) and 17 (17,7%). There was a statistically significant relationship between serum vitamin D levels and BMD at both locations at the femoral neck (the regression coefficient: 3.3.10-3; the coefficient of determination: 0.09); as well as at the lumbar spine (the regression coefficient: 5.1.10-3; the coefficient of determination: 0.063). - Conclusion: Vitamin D deficiency in CKD patients with eGFR < 60 ml/min/1.73m2 is common. There was a statistically significant weak relationship between serum vitamin D levels and BMD in both the femoral neck and lumbar spine.

Journal of International Economics and Management, 2023

HAL (Le Centre pour la Communication Scientifique Directe), 2004

In this paper, we seek to model the elastic and plastic behavior of a rotor engine under extreme ... more In this paper, we seek to model the elastic and plastic behavior of a rotor engine under extreme radial load conditions, such as when blade loss occurs. In particular, we focus on the resistance to plastic collapse of the rotor bearing support structure when a large radial force is acting in a circular orbit on the inside of the bearing housing. In our numerical model, we have used a new type of element, labeled Enhanced Assumed Strain (EAS), which presents an improved flexural behavior. This element allows us to keep the advantages of volume elements, while reproducing the good behavior of shells in bending. In a first stage, we have considered simple, hat-shaped geometries, with two different materials: mild steel, and titanium. In a second stage, a numerical model of a real front bearing support structure (FBSS) was studied. Comparison with experimental results from CERES contributed to the validation of the proposed modeling approach.

Journal of Nanomaterials, Feb 4, 2021

A low-cost and simplistic approach for the synthesis of nanosized SO 4 2-/TiO 2 photocatalyst was... more A low-cost and simplistic approach for the synthesis of nanosized SO 4 2-/TiO 2 photocatalyst was successfully performed using Binh Dinh ilmenite ore and H 2 SO 4 as titanium and sulfur sources, respectively. The experimental results indicate that the obtained material exists in the form of particles with a size of about 22 nm and has a specific surface area of about 49 m 2 g-1. Compared with the TiO 2 sample, the SO 4 2-/TiO 2 sample shows much higher photocatalytic degradation of rhodamine B (RhB) under the sunlight irradiation. In more details, the nanosized SO 4 2-/TiO 2 sample obtained is capable of completely decomposing RhB after 9 hours of irradiation by a 60 W LED lamp with a corresponding intensity of 9,500 Lux. However, when the SO 4 2-/TiO 2 is irradiated by the sunlight with the intensity of 65,000 Lux, it only takes 2 hours to completely decompose rhodamine B (RhB), facilitating the use of SO 4 2-/TiO 2 as a potential photocatalyst for the RhB photodegradation.

Tạp chí Kiểm nghiệm và An toàn thực phẩm, Sep 12, 2022

Currently, solid phase extraction (SPE) with immunoaffinity columns is applied in most standardiz... more Currently, solid phase extraction (SPE) with immunoaffinity columns is applied in most standardized methods for mycotoxin determination to purify extracts and analysis by HPLC-FLD, HPLC-UV/VIS or LC-MS/MS. Therefore, sample preparation and analysis by instruments are time-consuming and high operating costs. The novel method allow simultaneously identify nine mycotoxin compounds with selective, stable and accurate results. The new method has been evaluated through three stages including validation as requirements of CEN/TR 16059:2010 (phase 1), comparison with current standard methods (phase 2), evaluate the method using an interlaboratory comparison program (phase 3). Cereal samples were extracted by QuEChERS and analyzed by LC-MS/MS. The limit of quantitation (LOQ) was 0,5 μg/kg for each aflatoxin compound and 40 μg/kg, 25 μg/kg, 1 μg/kg, 75 μg/kg for deoxynivalenol, zearalenone, ochratoxin A, each toxin fumonisin (B1&B2), respectively. The recovery is in the range of 70-120%, relative standard deviation RSD < 20%. The novel method also gives the same results compared to the individual standardized methods, using the immunoaffinity column in the extraction stage. At the present, the method is being evaluated through an interlaboratory comparison program with two rounds: round 1 (for survey) and round 2 (official round), which is expected to be implemented in 2022.

Tạp chí Y Dược học, Dec 1, 2021

A pre-clinical sign of atherosclerisis is hypertrophy of arterial wall. Femoral intima-media thic... more A pre-clinical sign of atherosclerisis is hypertrophy of arterial wall. Femoral intima-media thickness is noninvasive marker of arterial wall alteration, which can easily be assessed by high resolusion B mode ultrasound. Aims: To investigate the correlation between femoral intima-media thickness and the severity of coronary artery diseases. Methods: 111 consecutive patients with coronary artery diseases were enrolled. Femoral intima-media thickness was assessed by B mode ultrasound with 7.5 - 10 MHz probe about 10 - 15 mm before bifurcation to profond and superfacial femoral arteries. The femoral intima-media thickness < 1.0 mm is named as “normal”, ≥ 1.0 mm is “thick” and ≥ 1.5 mm is defined as “atherosclerosic femoral plaque”. The severity of coronary artery diseases was calculated by Gensini Score. Results: Mean femoral intima-media thickness was 1.57 ± 1.23 mm, 55% patients with abnormal femoral intima-media thickness (male 57.0% vs female 50.0%), 36.9% of patients with coronary artery diseases had atherosclerosic femoral plaque. There was a good correlation between femoral intima-media thickness and severity of coronary artery diseases by Gensini score and its risk factors (age, plasma glucose, smoking, hypertension…). Conclusion: Patients with coronary artery diseases are likely to have concomittant peripheral artery disease with high frequency of femoral artery wall changes. Femoral intima-media thickness could be a helpful diagnostic marker and therapeutic points. Key words: atherosclerisis, Femoral intima-media thickness, coronary artery diseases, femoral intimamedia thickness (F.IMT).

CrystEngComm, 2017

Oxide heterostructures based on cubic perovskite have been studied widely but there has been litt... more Oxide heterostructures based on cubic perovskite have been studied widely but there has been little interest in the combination of different polymorphs, such as hexagonal and cubic manganites, into a single heterostructure.

Functional Plant Biology, Mar 28, 2022

Calcium signals serve an important function as secondary messengers between cells in various biol... more Calcium signals serve an important function as secondary messengers between cells in various biological processes due to their robust homeostatic mechanism, maintaining an intracellular free Ca2+ concentration. Plant growth, development, and biotic and abiotic stress are all regulated by Ca2+ signals. Ca2+ binding proteins decode and convey the messages encoded by Ca2+ ions. In the presence of high quantities of Mg2+ and monovalent cations, such sensors bind to Ca2+ ions and modify their conformation in a Ca2+-dependent manner. Calcium-dependent protein kinases (CPKs), calmodulins (CaMs), and calcineurin B-like proteins are all calcium sensors (CBLs). To transmit Ca2+ signals, CPKs, CBLs, and CaMs interact with target proteins and regulate the expression of their genes. These target proteins may be protein kinases, metabolic enzymes, or cytoskeletal-associated proteins. Beyond its role in plant nutrition as a macroelement and its involvement in the plant cell wall structure, calcium modulates many aspects of development, growth and adaptation to environmental constraints such as drought, salinity and osmotic stresses. This review summarises current knowledge on calcium sensors in plant responses to osmotic stress signalling.

Journal of Magnetism and Magnetic Materials, Jul 1, 2019

In this work, we have investigated the bismuth-substituted yttrium iron garnet (Bi-YIG) thin film... more In this work, we have investigated the bismuth-substituted yttrium iron garnet (Bi-YIG) thin films prepared on glass substrate by modified metal-organic decomposition method. Real-time Faraday rotation spectrometer was used to characterize the magneto-optical properties of Bi-YIG films. The reliability of the measurement system and optimized analyzer setup was confirmed by comparing the Jones matrix calculations and measured results. The effect of annealing condition on the structural, magnetic and magneto-optical properties was investigated. A clear garnet-phase without secondary phase was observed for the Bi-YIG films annealed above 800°C. Faraday rotation spectra of these films reveal the correlation between their crystallinity and magneto-optical properties. The highest Faraday rotation angle of −3.1°/μm was achieved for 800°C annealed sample. Simultaneous evaluation of real-time Faraday rotation spectra and the corresponding hysteresis loops can establish a path for the application of time-resolved magneto-optical spectroscopic analysis of magnetic thin films.

Keywords: Psychologie et sociologie ; Medias ; communication et culture ; Section SIE ; Section I... more Keywords: Psychologie et sociologie ; Medias ; communication et culture ; Section SIE ; Section IN Reference SHS-STUDENT-2008-136 Record created on 2008-07-07, modified on 2017-05-12

Известия высших учебных заведений, Apr 22, 2018

Tạp chí Kinh tế và Phát triển

Đại dịch Covid-19 đã đi qua nhưng nó vẫn đang tạo ra rất nhiều hệ lụy và ảnh hưởng đến tâm lý, cu... more Đại dịch Covid-19 đã đi qua nhưng nó vẫn đang tạo ra rất nhiều hệ lụy và ảnh hưởng đến tâm lý, cuộc sống và sự gắn kết với công việc của người lao động, đặc biệt là những người làm việc tại các công ty có vốn đầu tư nước ngoài. Nghiên cứu này tập trung tìm hiểu và phân tích tác động của tình trạng căng thẳng vì Covid-19, hỗ trợ của tổ chức tới cân bằng công việc - cuộc sống và sự gắn kết với công việc của người lao động. Nghiên cứu sử dụng bảng hỏi được cấu trúc sẵn để khảo sát cán bộ quản lý người Việt tại công ty Samsung Display Vietnam với kích cỡ mẫu là 154. Mô hình cấu trúc tuyến tính PLS-SEM và phần mềm Smart PLS 3.3.3 được dùng trong phân tích và kiểm định giả thuyết nghiên cứu. Kết quả nghiên cứu chỉ ra rằng: (1) Hỗ trợ của tổ chức tác động tích cực trong khi căng thẳng vì Covid-19 là yếu tố tác động tiêu cực lên cân bằng công việc - cuộc sống và sự gắn kết với công việc; (2) Mức độ ảnh hưởng tới cân bằng công việc - cuộc sống và sự gắn kết với công việc của nhân tố hỗ trợ c...

International Journal of Management and Enterprise Development

Tiếp biến văn hóa là lý thuyết về sự biến đổi văn hóa khi có giao lưu văn hóa. Theo lý thuyết này... more Tiếp biến văn hóa là lý thuyết về sự biến đổi văn hóa khi có giao lưu văn hóa. Theo lý thuyết này, để có biến đổi văn hóa thì hai nền văn hóa khác nhau phải có sự tiếp xúc trực tiếp và liên tục. Tuy nhiên, muốn biết những biến đổi văn hóa đó sẽ có mức độ và xu hướng ra sao, cần nghiên cứu các yếu tố cụ thể tác động, chi phối quá trình biến đổi văn hóa trong giao lưu. Qua nghiên cứu trường hợp giao lưu văn hóa giữa người Bố Y với các tộc người khác, chúng tôi sẽ chỉ ra một số yếu tố nổi bật nhất trong đó.

Abstractive text summarization using sequence-to-sequence networks have been successful for short... more Abstractive text summarization using sequence-to-sequence networks have been successful for short text. However, these models have shown their limitations in summarizing long text as they forget sentences in long distance. We propose an abstractive summarization model using rich features to overcome this weakness. The proposed system has been tested with two datasets: an English dataset (CNN/Daily Mail) and a Vietnamese dataset (Baomoi). Experimental results show that our model significantly outperforms recently proposed models on both datasets.

Ceramics International, 2021

Abstract In this study, we examined the dependence of surface morphology and spin Seebeck effect ... more Abstract In this study, we examined the dependence of surface morphology and spin Seebeck effect (SSE) voltages on the poly[vinylpyrrolidone] (PVP) concentration in polycrystalline Y3Fe5O12 (YIG) ultrathin films on a silicon substrate synthesized by metal-organic decomposition followed by a crystallization process. During fabrication, PVP concentrations of 0.5 to 2 g were used while all other conditions remained fixed. Atomic force microscopy and grazing incidence X-ray diffraction (XRD) measurements revealed a strong dependence of crystallinity and sample morphology on PVP concentration. The 1-g PVP sample had the smoothest surface, with a root mean square roughness of 0.2 nm, as well as superior bulk uniformity with respect to the shape and intensity of XRD reflection peaks. This was confirmed by scanning electron microscopy measurements of a cross-section of the sample that revealed a uniform film without pores. SSE measurements were performed to obtain the output SSE voltages (VSSE) of all samples, to which a platinum layer was added as a spin-detection layer. Repeatedly, the 1-g PVP sample had the best performance, demonstrating the importance of film crystallinity and morphology in the spin-to-charge conversion efficiency of YIG films.

Epidemiology and Health, 2021

OBJECTIVES: An A/H5N1 vaccine (IVACFLU-A/H5N1) was accepted for use in Vietnam; however, antibody... more OBJECTIVES: An A/H5N1 vaccine (IVACFLU-A/H5N1) was accepted for use in Vietnam; however, antibody persistence after vaccination has not been well characterized. We examined post-vaccination antibody persistence and related risk factors in individuals enrolled in the phase II IVACFLU-A/ H5N1 vaccine trial in Ninh Hoa, Vietnam, who received a 15-μg dose (2 injections 21 days apart).METHODS: We used a longitudinal study design to follow 86 participants, without a control group. The participants tested as anti-A/H5N1 immunoglobulin G seronegative at baseline and received both doses of the vaccine. Blood was drawn at 30 months and 36 months after the complete vaccination to assess antibody status. Antibody persistence status was compared by demographic characteristics and exposure risk factors using univariate logistic regression.RESULTS: In total, 84.9% and 52.3% of the population showed persistence of at least 1/10 of the A/H5N1 antibodies at 30 months and 36 months after IVACFLU-A/H5N...

SCIENTIFIC JOURNAL OF TAN TRAO UNIVERSITY, 2020

Sự nghiệp vĩ đại của Chủ tịch Hồ Chí Minh gắn với đấu tranh loại bỏ chủ nghĩathực dân kiểu cũ, gi... more Sự nghiệp vĩ đại của Chủ tịch Hồ Chí Minh gắn với đấu tranh loại bỏ chủ nghĩathực dân kiểu cũ, giải phóng dân tộc, xác lập quyền sống trong hòa bình, tự do vàgiải phóng con người triệt để. Đó là những giá trị nhân văn cao đẹp, vĩnh hằng,phản ánh tầm vóc tư tưởng, đạo đức, phong cách của một trong những vĩ nhânlàm thay đổi lịch sử của thời đại.