Study on wafer fusion of GaN/inGaAIP and application to light-emitting diode

Tran, Vinh Hung 전북대학교 대학원 2002 국내석사

Characterization study of novel process and high purity-magnesium products recovered from brine and bitterns

Tran, Thi Khuyen Chonnam National University 2016 국내박사

Magnesium is known to be the lightest among the light metals. Due to its light weight and low density, Mg and its compounds have extensively been used in various applications such as in automotive, aerospace, electronics, agricultural and chemical industries, etc. Currently, magnesium is recovered from two major sources, namely seawater/brines/bittern and Mg – containing minerals. In this study, the recovery of Mg as carbonate was conducted using Uyuni salar brine (containing ~13.3 g/kg Mg) from Bolivia and bittern (containing ~41.1 g/kg Mg). Stabcal software was first used to investigate the stability of various magnesium species and Mg carbonate during the precipitation. Depending on the pH of solution, Stabcal predicts the formation of various Mg products such as Mg oxalate, magnesite, hydromagnesite, and magnesium hydroxide. The Mg recovery from Uyuni salar brine was conducted at different stoichiometries of 0.6 – 2.4:1 (corresponding to CO3/Mg molar ratio of 0.5 – 1.9:1) in the meanwhile a stoichiometry of 1:1 was used for the bittern. After precipitation, the solids were washed by distilled water prior to drying at 25, 65, and 100oC. X-Ray Diffraction results obtained for the samples recovered from brine as well as bittern confirmed the formation of dypingite – (MgCO3)4.Mg(OH)2.5H2O or (MgCO3)4.Mg(OH)2.8H2O at ambient temperature precipitation and drying while the drying at 65oC and 100oC formed hydromagnesite – (MgCO3)4.Mg(OH)2.4H2O. Field Emission – Scanning Electron Microscopy analysis showed that a sheet – like morphology was yielded for the hydromagnesite precipitated from the low – oxalate brine as well as bittern at room temperature precipitation and 100oC drying. Differential Thermal Analysis of dypingite – (MgCO3)4.Mg(OH)2.5H2O showed its total mass loss experimentally measured as 58.7 ± 0.1% including adsorbed water, equivalent to 41.2 ± 0.1% MgO in the residue. The total mass losses of hydromagnesite obtained at 65oC and 100oC drying were in the range of 54.8 – 56.7%, corresponding to 45.2 – 43.3% MgO in the residue. Theoretical mass losses of dypingite and hydromagnesesite should be 58.5% and 56.8%, respectively, representing 41.5% and 43.2% MgO in the residue. Chemical analysis showed that the hydromagnesite obtained from low – oxalate brine had a grade of 23.3 – 24.3%, corresponding to a content of 38.7 – 40.3% MgO. Meanwhile a grade of 25.3 – 25.9% Mg (~41.9 – 42.9% MgO) was yielded for hydromagnesite recovered from the high-oxalate brine and a 25.7 – 25.9% Mg (~42.7 – 42.9% MgO) was from bittern. Theoretical hydromagnesite should contain 26.0% Mg, representing 43.1% MgO. Differential Scanning Calorimetry analysis showed that the net endothermic energy released (heat adsorbed) during decomposition of hydromagnesite recovered from the low-oxalate brine was in the range –1173.1 to –1196.1 J/g. In the meanwhile those from high-oxalate brine and bittern were from –972.1 to –1073.8 J/g, and –585.1 to –591.2 J/g, respectively. Hydromagnesite obtained from the low-oxalate brine was found to have a highest endothermic energy.

베트남 빈증성 지역 진출 한국 자회사의 누적 생존율 및 영향 요인 분석

Tran, Thi Thanh Hang 부경대학교 2018 국내박사

In recent years, Vietnam has continued to attract foreign investment and has joined the Trans-Pacific Strategic Economic Partnership (TTP) and various trade agreements. In particular, since the Korea-Vietnam FTA came into effect in 2015, both the investment and trade volume between Korea and Vietnam have been rapidly increasing. Considering that overseas exits are on the rise in investment in Korea and Vietnam, the survival factors of subsidiaries need to be analyzed. The purpose of this study is to estimate the cumulative survival rate of Korean subsidiaries and analyze the factors affecting the survival rate of subsidiaries through data analysis of 435 Korean subsidiaries that entered in Binh Duong Province between 2005 and 2015. The Kaplan-Meier method was chosen to perform analyses on survival rate and its affecting factors. As a result, findings of the study showed that the business survival rate by the 5 year operating subsidiaries reached 86% and the 10-year cumulative survival rate was 45 %. The result was higher than those of the previous studies in Korea and Vietnam. An empirical analysis on the survival factors of firms used total six explanatory variables such as characteristics of firm(initial investment size, current size, CEO characteristics, investment type) and, regional characteristics(industrial zone vs general area). As a result, initial investment size and current size, investment type and regional characteristics of subsidiaries was positively related with survival rate. But CEO’s gender and nationality was not related with the survival rate of Korean Subsidiaries in Binh Duong Province.

EFFECT OF CHITOOLIGOSACCHARIDE SUPPLEMENTATION ON POULTRY

HOAI NAM TRAN 단국대학교 2017 국내석사

(ABSTRACT) EFFECT OF CHITOOLIGOSACCHARIDE SUPPLEMENTATION ON POULTRY Department of Bio-Resource Science Graduate School Dankook University HOAI NAM TRAN Advisor: Prof. IN HO KIM EXPERIMENT 1: EFFECT OF CHITTOOLIGOSACCHARIDE SUPPLEMENTATION ON PERFORMANCE, BLOOD CHARACTERISTICS, RELATIVE ORGAN WEIGHT, AND MEAT QUALITY IN BROILER CHICKENS This study was conducted to evaluate the effects of dietary supplementation with chitooligosaccharide (COS) on growth performance, blood characteristics, relative organ weight, and meat quality in broilers. A total of 480 broilers with an average initial BW of 45.04 g per chick were randomly allocated into 1 of the following 4 dietary treatments (20 broilers per pen with 6 pens per treatment): 1) CON (basal diet), 2) ANT (basal diet + 44 mg/kg of avilamycin), 3) COS0.2 (basal diet + 0.2% COS), 4) COS0.4 (basal diet + 0.4% COS). The experiment lasted for 5 wk and avilamycin was administered from d 0 to 21. Growth performance was measured on d 0, 21, and 35, and all other response criteria were measured on d 35. No change in feed conversion (G:F) was observed in response to any of the treatments throughout the experimental period (P > 0.05). However, BW gain and feed intake were greater (P < 0.05) in broilers provided with feed supplemented with COS than in those in the control group. In addition, broilers had significantly greater (P < 0.05) red blood cell and high-density lipoprotein cholesterol concentrations when they were provided with the COS0.4 diet, whereas the triglyceride concentration was lower (P < 0.05) in broilers in the COS0.2 treatment group. No other blood characteristics were affected by the treatments. Additionally, as the dietary COS concentration increased, the liver weight increased (P < 0.05). Conversely, as the concentrations of dietary COS increased, abdominal fat decreased (P < 0.05). Furthermore, meat yellowness decreased (P < 0.05) as the concentration of COS increased. Finally, the breast meat and abdominal fat of birds provided with feed supplemented with COS had a lower (P < 0.05) saturated fatty acid concentration but a greater concentration of total monounsaturated fatty acids (P < 0.05) than that of birds in the control. In conclusion, COS can improve the performance and breast meat quality of broilers while increasing the red blood cell and high-density lipoprotein cholesterol concentrations in blood. In addition, COS can induce a decrease in abdominal fat and improve meat quality. EXPERIMENT 2: EFFECT OF CHITTOOLIGOSACCHARIDE SUPPLEMENTATION ON EGG PRODUCTION, NUTRIENT DIGESTIBILITY, EGG QUALITY, AND BLOOD PROFILES IN LAYING HENS This study was conducted to evaluate the effects of dietary supplementation with chitooligosccharide (COS) on egg production, nutrient digestibility, egg quality and blood profiles in laying hens. A total of 240 Hy-line Brown laying hens were randomly allocated into one of the following 5 dietary treatments: i) CON, basal diet; ii) ANT, basal diet+44 mg/kg avilamycin; iii) COS0.2, basal diet+200 mg/kg COS; iv) COS0.4, basal diet+400 mg/kg COS; v) ANTCOS, basal diet+200 mg/kg COS+22 mg/kg avilamycin. The experiment lasted for 6 wk. No change in egg weight (P > 0.05) was observed during the trial period. Egg production in ANTCOS treatment was improved (P < 0.05) when compared to CON during weeks 4-6. The birds in the COS0.2, COS0.4 and ANTCOS groups had higher (P < 0.05) Haugh unit than those fed CON and ANT diets at the end of the 6th wk. The apparent digestibility of nitrogen in CON group was lower (P < 0.05) than in other treatments. The white blood cell (WBC) concentration of birds in the COS0.4 and ANTCOS group was higher (P < 0.05) than that of birds in other groups at the end of the 6th wk. In addition, the differences of WBC counts between the beginning and end of the experiment in COS0.4 and ANTCOS groups were higher (P < 0.05) than in CON and ANT groups. At the end of the experiment, the birds fed ANTCOS diet showed higher (P < 0.05) total blood protein concentration than those fed CON or ANT diets. In conclusion, dietary supplementation of COS appeared to increase egg production and quality by increasing nutrient digestibility. Additionally, COS improved WBC and total protein concentration.

Liquid Phase Sintering of BaY0.1Zr0.9O2.95 Proton Conducting Ceramics

니구겐 트란 휴엔 디에우 전남대학교 대학원 2013 국내석사

Liquid Phase Sintering of BaY0.1Zr0.9O2.95 Proton Conducting Ceramics For Use in Intermediate Temperature Solid Oxide Fuel Cells Huyen Dieu Nguyen Tran Department of Materials Science and Engineering Graduate School Chonnam National University (Supervised by Professor John Fisher) Abstract Ytrria-doped BaZrO3 with the perovskite structure shows potential as a proton conducting electrolyte for solid oxide fuel cells (SOFCs), which represent the state of the art in recent years. The present thesis consists of two research topics concerning Yttria-doped BaZrO3: in the first part, we have presented results on the influence of sintering aids on the densification of polycrystalline BaZr0.9Y0.1O3-δ (BZY10); in the second part, the solid state crystal growth method was used to grow single crystals of BaZr0.9Y0.1O3-δ and the structurally related material SrTiO3. In the first part, powders of BaZr0.9Y0.1O2.95 (BYZ10) were prepared by using the solid-state reaction method with BaCO3, Y2O3 and ZrO2 starting chemicals. The appropriate amounts of Bi2O3, MnCO3 and CuO were then added into the calcined powder as liquid phase sintering aids. The effects of sintering aids on densification, microstructure and electrical properties were studied. Samples were pressed into pellets by cold isostatic pressing at 1500 kg/cm2 (147 MPa) and sintered in the range of temperature from 1400ºC to 1700ºC for 5 hours. Densification of samples was measured by the bulk density method; the density of 3wt% MnCO3 and CuO doped BZY10 reached 93% and 93% theoretical density respectively. The microstructure of samples was studied by scanning electron microscopy (SEM). The structure of the sintered ceramics and the possibility of secondary phases were examined by X-ray diffraction (XRD). All samples were single phase perovskite with cubic structure. Electrical properties of the as-prepared samples was examined below 220?C with impedance spectroscopy. In polycrystalline ceramics, the electrical or ionic conductivity often consists of two components; a bulk conductivity and a grain boundary conductivity. In particular, for acceptor-doped BaZrO3 the grain boundary conductivity is substantially lower than that of the bulk conductivity and dominates the impedance plots. In order to study the bulk conduction mechanisms, it is necessary to grow single crystals of BZY or materials with a similar structure such as SrTiO3. In the second part of this work, the solid-state crystal growth (SSCG) technique is used to grow single crystals of BZY10 and SrTiO3. The principle of the SSCG method is based on inducing abnormal grain growth of the ceramic composition on a seed crystal. This method shows many advantages compared to other single crystal growth techniques e.g. it takes place without melting of the ceramic matrix, it does not need expensive Pts crucible or high temperature processing. Calcined powders of BYZ and Fe-doped SrTiO3 are used to grow single crystals using 8 mol % Yttrium doped ZrO2 and SrTiO3 seed crystals respectively. A single crystal of BZY10 has grown to a thickness of about 5μm on a <100> oriented YSZ seed. Single crystals of Fe-doped SrTiO3 grew to thicknesses of 5 - 25?m on <100> oriented SrTiO3 seeds, with the growth distance varying with sintering atmosphere.

Physics-based impedance modeling of mixed ionic electronic conductors, liquid/polymer/solid electrolytes, and human body segments

TRAN THI HUYEN TRAN 전남대학교 2024 국내박사

Impedance spectroscopy, with its roots extending over a century, remains a cornerstone technique in the characterization of material properties. Despite its extensive history, the inter- pretation of impedance data has often been fraught with challenges, with models frequently prioritizing curve fitting over a comprehensive understanding of the underlying mechanisms and material properties. A significant contributor to the problem is the over-reliance on the Constant Phase Element (CPE), which can obscure the true characteristics of the materials under investigation. This thesis addresses these critical issues, motivated by the necessity for more accurate and insightful impedance analysis. The scope of this research encompasses the characterization and modeling of impedance behavior across a diverse range of materials, including mixed electronic-ionic conductors, solid, liquid, and polymer electrolytes, as well as human body segments. By developing physics-based impedance models, this work aims to deliver a more thorough and precise understanding of these materials, thereby enhancing the reliability and applicability of impedance spectroscopy in material science. This dissertation investigates the electrical properties of mixed ionic-electronic conductors (MIECs) and human body segments through systematic in-situ impedance analysis. The primary focus is on cathode materials such as lithium vanadium phosphate (LVP) and sodium vanadium phosphate (NVP), exploring their charge transport mechanisms, phase transitions, and tempera- ture influences. X-ray diffraction (XRD) and differential scanning calorimetry (DSC) confirmed the successful synthesis and phase transitions, respectively. The study applies the transmission line model (TLM) to elucidate temperature-dependent parameters, providing insights into the ionic and electronic conductivities of NVP and LVP. Similarly, as for the ions and electrons in mixed conductors, Nernst-Planck flux model can be applied for cation and anion in liquid and polymer electrolytes for batteries. PEO:LiTFSI electrolyte is found to have Li+ transference number abound 0.1 independent of the temperature. The transference number of 1 M LiPF6 in EC/DMC increases with temperature from 0.01 at 10 °C to 0.25 at 60 °C. While the solid electrolytes like LLZO and LLTO have lithium transference number 1, electronic conduction is known to become substantial at grain boundaries to form dendrites. Heuristic modeling of temperature-dependent LLZO impedance is assisted by Python algorithms. Additionally, the research extends to biological impedance analysis, particularly in human body segments. Utilizing principles of porous electrode theory and the Nernst-Planck flux model for body solution within the transmission line framework, as for the battery liquid electrolytes, the study offers an innovative approach to understanding the complex impedance behavior of human body segments. The integration of stray capacitance in automated Keithley channel circuitry simulations revealed an average stray capacitance with mode-dependent variations. This incorporation improved the accuracy of impedance simulations, although challenges in merging high-frequency stray effects with analytical functions were noted. The work further employs Python simulations, based on Miran Gaberšček’s matrix tools, to enhance visualization and understanding of body fluid dynamics. The Nernst-Planck theory is applied to explain fluid distribution variations, with simulations corroborating the model’s accuracy. Despite the time-intensive nature of individual EIS data simulation, the study under- scores the need for developing approximate analytical models to efficiently analyze extensive impedance databases. 임피던스 분광법은 100년 이상의 역사를 가지며, 물질 특성화를 위한 핵심 기술로 자 리매김하고 있다. 그러나 임피던스 데이터 해석은 종종 도전적인 과제로 여겨지며, 모델이 기본 메커니즘과 물질 특성을 포괄적으로 이해하는 것보다 곡선 맞추기에 우선하는 경우가 많다. 이러한 문제에 크게 기여하는 요소 중 하나는 Constant Phase Element (CPE)에 대한 과도한 의존으로, 이는 조사 대상 물질의 진정한 특성을 가릴 수 있다. 이 논문은 더 정확하고 통찰력 있는 임피던스 분석의 필요성에 의해 이러한 중요한 문제를 해결하려고 하였다. 이 연구의 범위는 혼합 전자-이온 전도체, 고체, 액체 및 폴리머 전해질, 인체를 포함한 다양한 물질의 임피던스 거동을 특성화하고 모델링하는 것을 포함한다. 물리 기반 임피던스 모델 을 개발함으로써 이 연구는 이러한 물질에 대한 더 철저하고 정확한 이해를 제공하여 물질 과학에서 임피던스 분광법의 신뢰성과 적용 가능성을 향상시키는 것을 목표로 한다. 체계적인 인시투 임피던스 분석을 통해 혼합 이온-전자 전도체(MIECs)와 인체 분절의 전기적 특성을 조사하였다. 주요 초점은 리튬 바나듐 인산염(LVP) 및 나트륨 바나듐 인산염 (NVP)과 같은 캐소드 물질에 있으며, 이들의 전하 전달 메커니즘, 상 전이 및 온도 영향을 탐구하였다. X선 회절(XRD) 및 차등 주사 열량 측정(DSC)은 이러한 물질의 성공적인 합성 및 상 전이를 확인하였다. 이 연구는 전송선 모델(TLM)을 적용하여 온도 의존적 매개변수를 해명하며, NVP 및 LVP의 이온 및 전자 전도성에 대한 통찰력을 제공하였다. 혼합전도체에서의 이온나르개와 전자나르개 처럼, 배터리 액체 전해질 및 폴리머전 해질에서는 양이온과 음이온이 전하중성을 맞추는 Nernst-Planck 모델을 따르게 된다. PEO:LiTFSI 는 온도에 관계없이 0.1 정도의 t+ 를 보이는 반면 EC/DMC 용매에 1M LiPF6 액체전해질은 10도에서 0.01 에서 60도에서 0.25 로 증가하였다. 인체 임피던스 연구도 진행되었는데, 다공성 전극 이론과 생체액의 전해질 거동을 고 려한 Nernst-Planck 모델을 전송선 프레임워크 내에서 활용하여, 인체의 복잡한 임피던스 거동을 이해하기 위한 혁신적인 접근 방식을 제공하였다. 자동화된 Keithley 채널 회로의 불필요한 커패시턴스를 통합한 시뮬레이션은 모드 의존적 변동과 함께 평균 약 0.1 nF의 불필요한 커패시턴스를 밝혀내었다. 이러한 통합은 임피던스 시뮬레이션의 정확성을 향상 시켰지만, 고주파 불필요한 효과를 분석 함수와 결합하는 데 있어 어려움이 있었다. Miran Gabersˇcek ˇ 등이 제안한 수치해석적으로 구하는 불균일한 TLM 을 인체임피던스에 적용하 였다. 개별 EIS 해석을 위해 여러 패러미터 들을 최적화 해야 하므로, 근사해석모델 개발이 필요하다.

Pomegranate (Punica granatum) Seed Linolenic Acid Isomers : Selective Estrogen Receptor Modulators? = 석류(Punica granatum) 종자유에서 분리된 리노렌산 이성체들의 선택적 에스트로겐 리셉터 수식자 (SERMs) 로의 작용성 : Tran Hoang Ngoc Ai

Hoang, Ngoc Ai Tran 경북대학교 2006 국내석사

Discovery and Mode of action mechanism study of Novel Nrf2 activators in Macrophages from Natural products

Tran, Phi-Long Kangwon National University 2018 국내석사

패혈증 비브리오균 VarS/VarA two-component system의 분자생물학적 특성 구명

Tran Nguyen Thu Tam 전남대학교 대학원 2009 국내석사

패혈증 비브리오균(Vibrio vulnificus)은 간장질환 등의 기저질환이 있는 환자에서 주로 발생하고 급속히 진행하여 높은 사망률을 나타내는 치명적인 패혈증을 일으키는 호염성 병원성 세균이다. 병원성 세균은 환경의 변화를 인식하여 센서 (histidine kinase)와 반응 조절자 (response regulator) 쌍으로 구성된 다양한 two-component system에 의해 유전자 발현을 특이적으로 조절한다. VarS/VarA two-component system은 대장균(Escherichia coli)의 BarA/UvrY, 살모넬라(Salmonella typhimurium)의 BarA/SirA 및 비브리오 콜레라균(Vibrio cholera)의 VarS/VarA 등 다양한 그람 음성 세균에서 발견되고 있다. 이 시스템은 전사후 조절 기작에 주로 참여하여 일차와 이차 대사 사이의 스위치로서 작동하며 다양한 병원성 세균에서 여러 독력 인자의 발현을 조절하는 것으로 잘 알려져 있다. 본 연구에서는 패혈증 비브리오균에서 VarA homolog(Vv-VarA)를 동정하여 in-frame deletion mutant를 제작하여 그 특성을 구명하였다. Vv-VarA 결손 돌연변이는 투명형으로 집락형태의 변화 및 말기 지수성장기와 초기 정지기 사이에서 성장 결함을 나타냈으며 포유동물세포에 대한 세포 독성 및 마우스에 대한 치사력이 10배정도 감소되는 것으로 확인되었다. 이러한 결과는 VarA system이 패혈증 비브리오균의 독력 조절에 중요한 역할을 하고 있음을 시사한다. Pseudomonas 종의 VarS/VarA system homolog인 GacS/GacA 시스템이 small noncoding RNA RsmY-Z-RsmA의 전사를 조절하는 것으로 알려져 있으며 이는 E. coli의 BarA/UvYY/CsrB/C/CsrA system의 그것과 유사하다. 또한 V. cholerae에서는 VarS/VarA system이 carbon storage regulator protein인 CsrA에 결합하는 small noncoding RNA인 CsrB, CsrC 및 CsrD의 전사를 활성화 시키는 것으로 알려져 있다. 패혈증 비브리오균 유전체 (genome) 또한 두개의 small noncoding RNA인 CsrB와 CsrC homologue를 갖고 있으며 이들의 varA 돌연변이에 의해 억제되는 것으로 나타났다. 이상의 결과는 패혈증 비브리오균의 새로운 신호전달 시스템인 VarS/VarA/CsrB/C/CsrA가 독력조절에 중요한 역할을 하고 있음을 시사한다. Vibrio vulnificus, a halophilic estuarine bacterium, rapidly proliferates in susceptible human hosts and causes tissue necrosis and fatal septicemia. Pathogenic bacteria recognize environmental change and modulate specific gene expression by various two-component signal transduction systems composed of cognitive histidine kinase and response regulator pairs. The VarS/VarA two-component system homologues exist in a variety of gram-negative bacteria: they are BarA/UvrY in Escherichia coli, BarA/SirA in Salmonella typhimurium, and VarS/VarA in Vibrio cholerae. This system was reported to operate a switch between primary and secondary metabolism in response to environmental changes, with a major involvement in posttranscriptional control mechanisms. A number of virulence traits were reported to be under the control of this system in different pathogenic bacteria. We identified VarA homolog and constructed an in-frame deletion mutant of varA gene in a highly virulent V. vulnificus strain. The mutation altered colony morphology from opaque to translucent and caused a growth defect during both late exponential and early stationary phases. Cytotoxicity to eukaryotic cells was significantly decreased by the mutation. Those changes in the mutant could be complemented in trans by a plasmid encoding a wild-type allele of varA. Lethality of the var- mutant to mice was decreased by 10-fold. These results suggest that VarA may play an important role in virulence regulation of V. vulnificus. In other gram-negative bacteria, VarS/VarA homologues were reported to interact with noncoding regulatory RNAs. We identified two small nonconding RNAs, CsrB and CsrC, in the V. vulnificus genome, and found that they were down regulated in the varA deletion mutant. These results imply the existence of a virulence regulation signaling cascade in V. vulnificus: signals should be relayed in the sequence of VarS ' VarA ' CsrB/C ' CsrA ' yet unidentified effectors genes.

(A) Study on factors affecting the foreigners’ perception of Vietnam : Focus on Vietnamese cultural identity and foreigners’ experience

TRAN QUY CAT TUONG 한국외국어대학교 대학원 2024 국내석사

현대 시대에 국가 브랜딩은 모두 세계 정부에게 새로운 용어가 아니다. 한 나라의 긍정적인 이미지와 독특한 문화를 국제사회에 성공적으로 수출하기 위해서는 모든 국가에서 적절한 미디움을 선택하고 체계적인 커뮤니케이션 전략을 수립해야 한다 (Dinnie, 2008; 김유경, 2004; Jun & Choi, 2007). 따라서 국제 관객의 국가 인식에 영향을 미치는 요인을 파악하는 것이 필요하다 (Anholt, 2005; Kim Y. K. et al., 2009). 본 논문은 안홀트 (2005)의 국가 브랜드 육각형 차원의 개념적 틀을 바탕으로 외국인들이 베트남을 어떻게 인식하는지를 밝히는 것을 목표로 한다. 본 연구에서는 특히 베트남의 국가 브랜드 이미지를 구성하는 육각형 측면과 관련된 구성 요소에 대한 평가 및 만족도가 이러한 국제 청중의 태도에 어떤 영향을 미치는지 탐구했다. 베트남인이 아닌 시민을 대상으로 한 총 454 명의 적격 설문조사 응답에 따르면 이들 중 대부분은 베트남에서의 문화 경험에 만족했으며 대부분 베트남 국가에 대해 긍정적인 인식을 갖고 있는 것으로 나타났다. 이 실증적 연구 결과에 따르면 베트남의 요리 문화 체험과 전통 예술 체험에 대한 국제 관광객의 만족도는 베트남 문화 정체성에 대한 견해에 긍정적인 영향을 미치는 것으로 나타났다. 게다가, 이 연구는 또한 외국인의 문화적 정체성에 대한 평가, 베트남 국민 행위에 대한 평가, 국가통치에 대한 평가, 베트남의 경제환경 및 투자 잠재력에 대한 평가와 같은 요소를 설명했다. 관광 서비스 및 베트남산 제품에 대한 만족도는 외국인의 베트남에 대한 전반적인 인식에 긍정적인 영향을 미친다. 국제 청중이 국가를 브랜드로 인식하는 방식에 긍정적인 영향을 미치는 요소를 결정함으로써 (Anholt, 2005; 김유경 외, 2009; Dogan & Petkovic, 2016), 본 연구 결과는 적절한 미디움을 선택하고 효과적인 전략을 수립하며 동시에 베트남 정부의 시간과 국가 자원을 절약하는 데 도움이 될 것이다. A study on factors affecting the foreigners’ perception of Vietnam: Focus on Vietnamese cultural identity and foreigners’ experience Tran Quy Cat Tuong Department of Media Communication Graduate School Hankuk University of Foreign Studies In a contemporary era, nation branding is no longer a new term for governments. With the goal to successfully export positive images and unique culture of a country to the international public, building a systematic communication strategy and selecting appropriate communication tools are necessary in every nation (Dinnie, 2008; Kim Y. K., 2004; Jun & Choi, 2007). Therefore, it is significant to identify the factors which affect a nation's awareness of international audiences (Anholt, 2005; Kim Y. K. et al., 2009). Based on Anholt's conceptual framework of the Hexagon dimensions, this thesis aims to discover how foreign residents perceive Vietnam. The study particularly explored how these international audiences' attitudes were affected by the assessment and satisfaction towards components that are related to the Hexagon facets that constitute the Nation brand image of Vietnam. A total of 454 qualified survey responses from non-Vietnamese citizens revealed that most of them were satisfied with their cultural experiences in Vietnam and mostly have positive perception of the country. The findings of this empirical study indicated that international tourists' satisfaction with the culinary culture and traditional art experiences in Vietnam has a positive impact on their views of the Vietnamese cultural identity. Besides, the study also illustrated that factors such as foreigners' assessment of cultural identity, assessment of the Vietnamese people's behavior, assessment of national governance, assessment of the economic environment and investment potential in Vietnam; as well as satisfaction with tourism services and Vietnam-origin products have a positive impact on foreigners' general perception of Vietnam. By determining the elements that positively influence on how the international audience perceives the country as a brand, the findings benefit for the purpose to select suitable communication mediums and formulate effective strategies whilts saving time and national resources for the Vietnamese government.