제품 호환성 아니면 제품 비호환성이 진입저지할 수 있을까?

WANG XIAO 경희대학교 대학원 2024 국내석사

제품 호환성 아니면 제품 비호환성이 진입저지할 수 있을까? WANG XIAO 경희대학교 경제학과 석사과정 지도교수: 김정유 본 논문에서는 오래된 문제를 다시 검토할 것이다. 즉, 망 외부성이 있는 산업에서 기존 기업들이 전략적으로 제품을 상호 호환되거나 호환되지 않는 것을 선택하여 잠재 진입자의 진입을 저지할 수 있는지 여부이다. 직관적으로 제품이 호환되면 기존 기업들이 자체 네트워크 규모를 확장하기 위한 가격 경쟁이 덜 치열해지기 때문에 기존 기업들의 가격은 제품이 호환되지 않을 때의 가격보다 높다는 것이다. 진입자의 가격은 전략적 보완성으로 인해 높을 수도 있고, 진입 기업은 상호 호환되는 제품을 제공하는 기존 기업으로 부터 시장 점유율을 빼앗기 위해 진입자의 가격은 낮을 수도 있다. 비호환 조건에서 진입자의 가격이 시장 점유율 증가 효과를 지배할 만큼 낮으면 진입을 저지하기 위해 기존 기업들이 비 호환적인 경향이 있지만, 진입자의 가격이 높으면 진입을 저지하기 위해 기존 기업들이 상호 호환되는 경향이 있다. 이러한 상충되는 직관이 존재하고, 기존 기업이 진입 위협에 직면했을 때 진입을 저지하기 위해 상호 호환되지 않는 경향이 있는 증거가 많이 있지만 우리의 분석에 따르면 기존 기업들이 항상 진입을 저지하기 위해 호환성을 선호한다. 우리는 Salop 의 제품 차별화 원형 도시 모델을 기반으로 분석할 것이다. 키워드: 진입위협, 비 호환성, 호환성, 망 외부성. Is Entry Deterred by Product Compatibility or by Product Incompatibility? WANG XIAO Master of Economics Advisor: Jeong-Yoo Kim In this paper, we reexamine an old issue of in an industry with network externality, whether incumbents strategically choose to make their products compatible or incompatible with each other to deter entry. The intuition is that if the products are compatible, the price competition between the incumbents to increase their own network size becomes less severe, so the prices of the incumbents will be higher than under their mutual incompatibility. Then, the entrant’s price can be either high due to strategic complementarity or low to recover its market share against the incumbents providing mutually compatible products. If the entrant’s price under incompatibility is low enough to dominate the resulting effect of increasing the market share, incumbents will prefer incompatibility to deter entry, but if the entrant’s price is higher under incompatibility, incumbents will prefer mutual compatibility to deter entry. Although there are such conflicting intuitions and there are also quite a few evidence supporting that incumbents prefer their mutual incompatibility in the face of entry threat, our analysis shows that incumbents always prefer compatibility to deter entry. We analyze based on Salop's product differentiation prototype city model. Key Words: entry deterrence, incompatibility, mutual compatibility, network externality

IPA기법을 활용한 방한 20대 중국 관광객의 공유숙박 선택속성에 관한 연구

WANG XIAO 경희대학교 대학원 2019 국내석사

Changes in the travel patterns of travelers and the development of new types of economic concepts have resulted in different accommodation types in the tourism industry. The development of the shared economy is the emergence of shared accommodation, a new type of accommodation, in the tourism industry. In addition, the growing market for individual Chinese tourists visiting Korea is drawing more attention as Chinese tourists in their 20s are gradually taking to the social stage. In line with the travel patterns of Chinese tourists in their 20s, shared accommodation in Korea has become an important part of the tourism industry. While many prior studies are being conducted on the characteristics of accommodation selection, studies on shared accommodation selection properties are still insignificant. This study could contribute to establishing an effective strategy and reducing trial and error for the shared lodging industry under these circumstances, and maximising profit margins. Also, this study is aimed at improving the Korean shared lodging market and developing marketing strategies in the market segment by analyzing the importance and satisfaction differences among the attributes by classifying the 20 Chinese tourists visiting Korea by demographics, targeting the growing number of Chinese tourists in their 20s. To achieve the purpose of this study, 30 shared accommodation selection attributes were derived based on the prior study and 350 samples were collected from April 15 to May 15, 2019 from 20 Chinese tourists with shared accommodation experience through performance questionnaire at Incheon International Airport or Hongdae to identify the differences between importance and satisfaction. In this study, IPA techniques were used to analyze technical statistics, reliability, feasibility, and analysis of IPA matrix by factor. According to the analysis, the factors of the characteristics of shared accommodation selection indicate that the reservation fee is reasonable, the reservation is easy to cancel and change, the foreign language translation is correct when using the platform, the location information of the accommodation provided by the platform is accurate, the evaluation score of previous users on the host, and the review is good. In particular, it is deemed urgent to prepare for the situation because it shows very low satisfaction compared to the importance of "the refund policy for accommodation is accurate" and "the location information of accommodation provided by the platform is accurate." However, this study has limitations that it is difficult to represent all Chinese tourists visiting Korea because it targets Chinese tourists in their 20s who use Korean shared accommodation, and that it is difficult to represent the entire Korean lodging service industry because it limited the number of Chinese tourists visiting Korea to research. In the future, a comparative study will have to be conducted between not only Korean sharing companies but also a number of lodging companies. 여행객의 여행 패턴의 변화와 새로운 형태의 경제개념의 발전에 따라 관광산업에서도 기존의 숙박유형과 차이를 가지는 숙박유형이 나타나게 되었다. 공유경제의 발전은 관광산업 부문에서 새로운 숙박유형인 공유숙박을 출현시킨 것이다. 또한 증가하고 있는 방한 중국 개별관광객 시장에 있어서도 20대 중국 관광객이 점차 사회 무대에 오르면서 이들의 소비 행위와 수요도 더욱 주목받고 있다. 20대 중국 관광객의 여행패턴과 맞물려 한국 공유숙박이 관광산업 내에서 중요한 부분이 된 것이다. 숙박시설 선택속성에 대한 많은 선행연구들이 진행되고 있지만 공유숙박 선택속성 관련 연구는 아직 미미한 실정이다. 본 연구는 이러한 상황에서 공유 숙박업자들에게 효과적인 전략 수립 및 시행착오 감소, 이를 통한 이윤 극대화에 기여할 수 있을 것이다. 또한 본 연구는 최근 증가하고 있는 한국 공유숙박을 이용하는 20대 중국 관광객을 대상으로 하여 그들의 공유숙박 성향과 그들이 중요하게 생각하는 선택의 속성은 무엇이며, 각 속성별 만족도는 어떠한지, 방한 20대 중국 관광객을 인구통계별로 분류하여 각 집단 간 속성별 중요도 및 만족도 차이를 분석하여 향후 한국 공유숙박시장을 개선하고 시장타켓 측면에서는 세분 시장 마케팅의 전략을 수립하고 발전방향을 모색하는 데에 목적이 있다. 본 연구의 목적달성을 위하여 가장 중요한 공유숙박 선택속성을 선행연구를 바탕으로 30개의 공유숙박 선택속성이 도출하였고 중요도와 만족도 간의 차이를 파악하기 위하여, 공유숙박 이용 경험을 지닌 20대 중국 관광객을 대상으로 2019년 4월 15일부터 5월 15일까지 인천공항이나 홍대에서 실적설문을 통하여 350개의 표본을 수집하였다. 본 연구에 IPA기법을 활용하여 기술통계와 신뢰성분석, 타당성분석, 요인별 IPA 매트릭스 분석을 실시하였다. 분석 결과 공유숙박 선택속성에서는 ‘숙박 요금이 합리적이다’, ‘숙박 환불정책이 정확하다’, ‘플랫폼에서 예약의 취소 및 변경이 쉽다’, ‘플랫폼 이용 시 외국어번역이 정확하다’, ‘플랫폼에서 제공하는 숙소의 위치정보가 정확하다’ 및 ‘호스트에 대한 이전 이용자의 평점, 리뷰가 좋다’ 등의 항목들이 중요도에 비해 낮은 만족도를 나타내고 있어 이들에 대한 중점적인 관리 및 개선이 필요한 것으로 나타났다. 특히 ‘숙박 환불정책이 정확하다’와 ‘플랫폼에서 제공하는 숙소의 위치정보가 정확하다’는 중요도에 비해 매우 낮은 만족도를 보이기 때문에 대비책이 시급한 것으로 판단된다. 그러나 본 연구에서는 한국 공유숙박을 이용한 20대 중국 관광객을 연구대상으로 하기 때문에 방한 중국 모든 관광객들을 대표하기 어렵고, 또한 공유숙박업만을 연구대상으로 한정했기 때문에 한국의 숙박서비스업 전체를 대표하기 어렵다는 한계가 있다. 이에 향후 연구에서는 한국 공유업체뿐만 아니라 다수의 숙박업체 간에 비교 연구가 이루어져야할 것이다.

Novel Polymer Adsorbents and Polymer/Hydroxyapatite Composite Adsorbents for Heavy Metal Removal : 고분자/hydroxyapatite 복합 흡착재의 중금속 제거특성에 관한 연구

Xiao Wang 금오공과대학교 대학원 2007 국내박사

고분자/hydroxyapatite 복합 흡착재의 중금속 제거특성에 관한 연구 / 왕샤오 금오공과대학교 대학원 섬유패션공학과 본 연구는 새로운 환경정화용 고분자계 신소재에 관한 것이다. 최근 환경과 식품 등에서 문제가 되고 있는 카드뮴이나 납 등의 중금속을 흡착제거하는 능력을 발휘하는 다공성 고분자 복합재의 개발을 위한 기반연구를 수행하는 것을 목적으로 하고 있다. 중금속 흡착기능성을 가지는 기능성 소재로서는 생체유기물인 키토산과 무기합성물인 Hydroxyapatite(HAp)를 사용하였으며 고분자 매트릭스로는 폴리비닐알코올(PVA)과 폴리아크릴로니트릴(PAN)을 사용하였다. 다공성 복합흡착재의 형성은 PVA 경우, 전분발포법을 이용하여 키토산과의 복합 스펀지형 다공체를 제조하는 연구와 PVA/HAp 복합수용액으로부터 동결융해법(freeze-thawing)에 의한 동결융해젤(cryogel)을 제조하였으며, PAN 경우 질산수용액을 NaOH수용액에 적하하며 비드(bead)를 생성할 때 CaCl2와 NaH2PO4를 원료로 in-situ 방법으로 HAp가 나노사이즈로 PAN 비드내에 합성되는 방법을 사용하였다. 각 다공성 복합흡착재의 제조공정의 파라메터에 따른 구조 및 물성의 변화를 고찰하였으며, 제조된 흡착재의 카드뮴 중금속 제거 성능을 Atomic Adsorption Spectroscopy로 분석하였다. Novel Polymer Adsorbents and Polymer/Hydroxyapatite Composite Adsorbents for Heavy Metal Removal Xiao Wang Department of Textile & Fashion Engineering,Graduate School, Kumoh National Institute of Technology Abstract The purpose of the present study is to design several novel adsorbents for heavy metal removal, to characterize the morphologies and structures of adsorbents, and to investigate adsorbent-forming mechanism, adsorption mechanism, adsorption kinetics, adsorption isotherm, and effects of various conducting parameters on adsorption behaviors of adsorbents. Based on the summary of previous reports on adsorbents, chitosan and hydroxyapatite have been known to have excellent adsorption properties towards metal cations and widely used for the purification of wastewaters. Taking into account the prerequisites of adsorbents such as porous structures, high surface area, functional groups and high abrasion resistance and thermal stability, functional material/polymer composite adsorbents were considered. The novel adsorbents in this study were designed as chitosan/poly(vinyl alcohol) composite foam, hydroxyapatite/ poly(vinyl alcohol) composite cryogel, hydroxyapatite/poly(vinyl alcohol) composite cryogel immobilized on PVA and PU foams, hydroxyapatite/ poly(vinyl alcohol) composite nanofiber through in-situ synthesis, polyacrylonitrile bead, hydroxyapatite/polyacrylonitrile composite bead through in-situ synthesis, and hydroxyapatite/poly(acrylic acid) composite spherical particle through in-situ synthesis. Macroporous chitosan/poly(vinyl alcohol) (PVA) foams made by a starch expansion process demonstrated an interconnected and open-cell structure with large pore sizes from denary ㎛ to centuple ㎛ and high porosities from 84.3% to 73.6%. The HAp/PVA cryogel fabricated through a freeze-thawing process provided interconnected macropores varying from 0.1 ㎛ to several ㎛ and well dispersed and immobilized HAp in cryogel. The cryogel strength depended on initial PVA concentration, HAp amount and thawing rate. Cryogelation mechanism was investigated using XRD, DSC and turbidity analysis. Water crystallization played an important role in the cryogelation process. The removal of Cd2+ by HAp/PVA cryogel was mainly due to ion-exchange, together with small contributions of surface complexation. The macropores of PU foams were found to be entangled with HAp/PVA cryogel to get a stable structure, whereas cryogel adhered to the wall of PVA foam after oven-drying. Freeze-dried foams were stuffed with HAp/PVA cryogel and the intrinsic big macropores were full of HAp/PVA cryogel with small macropores. The nanoscale size in the range of 50-200 nm of HAp was observed in composite nanofibers with diameters of 0.5-1 ㎛. XRD and ATR results confirmed the synthesis of HAp. Dense PAN and porous HAp/PAN beads were formed when dropping PAN or PAN/salts nitric acid system into NaOH coagulation bath. Three stages with diverse groups were suggested under different NaOH concentration and treating time according to the results of FTIR and XPS. Formation of HAp was verified by FTIR, XPS and XRD results. The highest yield of HAp was 59.02% through TGA evaluation. The groups -C=N-C, NH, NH2 and COO- of PAN beads provided binding sites for chelation of Cd ions, mainly -C=N-C and COO-. Moreover, COO- also acted as an ion-exchange group. HAp/PAA particles with diameters in the range of 20-100 ㎛ were made through inverse suspension polymerization. Nanosize HAp of about 100 nm was obtained through in-situ synthesis. The dominant functional group of COOH (COONa) was responsible for Cd2+ sorption. The fast sorption indicated that the complexaion and exchange of Cd2+ by COOH (COONa) may conduct quickly. The acrylate with neutralization degree of 20% presented surprisingly increased sorption amount of Cd2+. The reason was ascribed to the exaggerated absorbent property. Moreover, the carboxylate groups are more efficient to realize ion exchange than the carboxylic groups. Batch experiments were conducted to evaluate the removal of copper and cadmium representative of heavy metals from aqueous solutions by the adsorbents. Pseudo-first-order, pseudo-second-order and double-exponential kinetic models were employed to describe the adsorption kinetics. The results of adsorption were fitted to both the Langmuir and Freundlich isotherm models. The experiment data of all adsorbents correlated well with Langmuir model. The effects of glutaraldehyde amount, pH, temperature, sonication, sorption time, Cd2+ concentration, cryogel size, agitation rate, HAp/PVA ratio and PVA concentration, drying method, NaOH concentration, treating time, HAp amount, acrylate, addition of urea, monomer concentration, crosslinker amount, initiator amount, cyclohexane/water ratio, SPAN60 concentration, polymerization temperature, polymerization time and stirring speed were selectively discussed according to different adsorbents. High adsorption capacities of 50-200 mg g-1 were obtained from the adsorbents, which implied the considerably potential application in adsorption process for heavy metal removal. Keywords: Adsorbent; Heavy metals; Adsorption; Hydroxyapatite; Poly(vinyl alcohol); Polyacrylonitrile; Poly(acrylic acid); FTIR and XPS spectra

12주간의 복합운동 프로그램이 비만 중국 남자 대학생의 신체구성과 혈중지질 및 심폐기능에 미치는 영향

WANG XIAO 가천대학교 일반대학원 2023 국내박사

본 연구는 12주간 복합운동 프로그램이 비만 중국 남자 대학생의 신체구성, 혈중 지질 및 심폐기능에 미치는 영향을 규명함으 로써 비만 및 만성질환 예방에 효과적인 운동프로그램 기초자료를 제공 하는 데 그 목적이 있다. 본 연구의 대상자는 중국 대학교에 비만 중국 남자 대학생 총 36명을 대상으로 선정하였다.선정된 대상자들은 무선할당(Random assignment)하여 복합운동 집단 18명과 통제 집단 18명으로 구성하였으며, 실험 전 연구 내 용 및 목적을 충분히 설명하고 동의서를 작성한 후 실험을 진행 하였다.복합운동 집단은 1일 60분씩, 주 3회, 12주간 복합운동 프로그램을 실시하였다. 사전(0주) 및 사후(12주) 총 2회의 걸쳐 수집된 자료는 이원변량분석 {Two-way (2x2) RG . RM ANOVA)을 이용하여 각 집단과 측정 시기에 따른 상호작용 효과 검증을 실시하였고, 상호작용 효과가 통계적으로 유의할 경우 사 후검중 (Bonferroni )을 실시하였다. 모든 통계 분석의 유의수준(a)은.05로 설정하였다. 1. 12주간 복합운동 프로그램 실시 전·후 신체구성 변인의 변 화를 분석한 결과, BMI는 유의하게 개선되었다. 2. 12주간 복합운동 프로그램 실시 전.후 혈중지질의 변화를 분석한 결과, TC ,TG, Glucose이 유의하게 개선되었 다. 3. 12주간 복합운동 프로그램 실시 전.후 심폐기능 변인의 변화를 분석한 결과, 최대산소섭취량, 운동심박수, 휴식심박수, 최대심박수이 유의하게 개선되었다. 이상의 결과를 토대로, 12주간 복합운동 프로그램은 비만 중국 남자 대학생들의 신체구성, 혈중 지질 및 심폐기능 변인을 효과적으 로 개선함으로써 비만 및 만성질환을 예방 및 개선시키는 데 긍정적인 효과를 나타내는 것을 입증하였다 키워드: 복합운동, 대학생, 신체구성, 심폐지구력

사회통합프로그램 한국어 교재에 대한 연구

Wang, Xiao Tong 강원대학교 대학원 2023 국내석사

This study analyzes the composition and content of textbooks using Korean textbooks for social integration programs published in 2020 based on the theory of textbook research. Through this analysis, I would like to examine what kind of education is being conducted in the Korean language education field of the social integration program, identify the characteristics and problems in education, and propose to develop future textbooks. The main body will mainly study the system and contents of the research object in earnest. Chapter 2 is a systematic analysis, and not only teaching materials for learning, but also learning measures, instructions for teachers, and auxiliary materials are used. Chapters 3 to 5 are content analysis and will be analyzed in all directions through linguistic perspectives, integrated education perspectives of language functions, and cultural perspectives. Specifically, Chapter 3 will analyze the contents of linguistic education such as pronunciation education, vocabulary education, and grammar education. Chapter 4 will use the meta-analysis method and analyze the aspect of integrated language function education in the textbook. Chapter 5 will analyze textbooks from the perspective of cultural education. Comparative analysis methods are also used a lot in this area. Chapter 6 summarizes the contents of each chapter, reveals the characteristics of the textbook, and proposes problems and future directions for textbook development. 이 연구는 2020년에 출간된 사회통합프로그램 한국어 교재를 대상으로 하여 교재의 구성 및 내용을 분석하는 것이다. 이러한 분석을 통해 사회통합프로그램인 한국어 교육 현장에서 어떤 교육을 진행하고 있는지 살펴보며 프로그램에 사용되는 한국어 교육는 어떤 특징과 문제점을 갖고 있는지를 밝히고 향후 교재 개발을 제안하였다. 본론 부분은 교재의 체계와 내용을 검토하였다. 2장은 사회통합프로그램 한국어 교육의 상황을 검토한 다음에 학습용 주교재뿐만 아니라 익힘책, 교사용지도서, 보조자료를 대상으로 체계적인 분석을 하였다. 3장부터 5장까지는 사회통합프로그램인 한국어 교육 교재의 내용 분석으로, 언어학적 관점, 언어기능의 통합교육 관점, 문화적 관점을 통하여 다방면적으로 분석하였다. 구체적으로 3장에서는 발음 교육, 어휘 교육, 문법 교육 등 언어학적 교육 내용을 분석하였으며, 4장에서는 메타 분석 방법을 이용하여 교재의 언어기능 통합교육 양상을 분석하였다. 5장에서는 문화 교육의 관점에서 교재를 분석하였고, 비교분석법을 활용하였다. 6장에서 각 장의 내용을 정리하고 교재의 특징을 밝히고 문제점과 향후의 교재 개발 방향을 제안하였다.

Essays in Urban and Real Estate Economics

Wang, Xiao Betty ProQuest Dissertations & Theses University of Penn 2021 해외박사(DDOD)

Location Choice and Environmental Performance of Toxic-Releasing Facilities in the United States

Wang, Xiao ProQuest Dissertations & Theses University of Illi 2019 해외박사(DDOD)

Current efforts in the United States to reduce toxic chemical releases from facilities rely on information disclosure programs such as the Toxic Release Inventory (TRI). The disclosure intends to help local communities take information-based actions and generate pressure on the facilities to reduce emissions. However, depending on residents’ political resources for collective action and their education regarding the health risks related to pollution, communities’ pressure can vary, and is usually weak in poor, minority, and less educated communities. Facilities may react to community pressure after the information disclosure by moving away from or improving their environmental performance in the communities with stronger pressure, which usually have a high socio-economic status. This can lead to disproportionately high exposure of residents to toxic chemicals in those disadvantaged communities, which can aggravate the problem of environmental injustice. This dissertation seeks to empirically examine the responses of toxic-releasing facilities to community pressure in making their decisions to (re-)locate or to improve their environmental performance after the TRI information disclosure. The main body of this dissertation is composed of four distinct studies. The first three studies focus on facilities that existed before the TRI and continued operating after its first disclosure. The first study examines the effect of community socio-economic characteristics on the relocation decisions of facilities. The main results of this study show that facilities located in communities with high population density, high income, and high educational attainment have a higher likelihood of relocating; they are also observed to relocate into communities with low population density, low income, and low educational attainment on average. The next two studies examine the environmental performance of facilities. The second study examines the performance of facilities that relocated. The third study examines the performance of facilities that decided to stay at their existing location. The main results of these two studies show that both facilities that moved to other communities and facilities that stayed in original communities choose emission levels based on the characteristics of their locations; they are found to generate more emissions in communities with a low socio-economic status. The fourth study switches to the new facilities born after the TRI and examines whether their location choice and post-siting performance are also affected by the socio-economic characteristics of communities. This study shows that new facilities prefer entering communities with low population density and low educational attainment; facilities making this choice are also associated with high emission levels after siting. This study also shows that income and race of communities are not good at explaining the location choice and the post-siting emission levels of facilities after the economic factors are controlled for. The findings from this dissertation help to explain the source of environmental injustice from the behavior of polluting facilities through their location choice and environmental performance after an information disclosure. The findings suggest a distributional impact analysis on the environmental disclosure programs to protect the socio-economically disadvantaged communities, especially the less educated ones.

Characterization of Carotid Plaque Vulnerability using Quantitative Ultrasound and Strain Imaging

Wang, Xiao The University of Wisconsin - Madison 2015 해외박사(DDOD)

Stroke is the leading cause of serious, long-term disability and the fourth leading cause of death in the United States. In addition to clinically recognized stroke, "silent" strokes may occur, and are five times more prevalent. Silent strokes are not detected based on classical transient ischemic attack (TIA) symptoms and therefore difficult to prevent. It is also likely that these "silent" strokes may cause accumulated cognitive decline, due to cerebral micro-emboli caused by instability in carotid vulnerable plaque. Thus it is important to characterize carotid plaque and assess its vulnerability. Plaque instability may be characterized by increased strain variations over a cardiac cycle with arterial pulsation. Therefore, strain imaging to detect plaque vulnerability based on regions with large strain fluctuations, may be able to determine plaque regions at increased risk for rupture. In this dissertation, accumulated axial, lateral and shear strain indices were correlated with cognitive function assessed on human subjects. Significant correlation of these maximum strain indices and cognitive function was demonstrated, indicating the feasibility of using strain indices to predict cognitive decline. Carotid plaque along with adventitia layer was segmented to identify vulnerable regions. Ultrasound strain imaging may therefore be a useful surrogate in the clinic to detect vulnerability of plaque and assess potential risk of silent stroke. Statistical distributions of strain indices in different groups of patients and volunteers were also evaluated, followed by comparison of strain indices to trans-cranial Doppler (TCD) results. In addition to strain estimation along longitudinal scanning planes, an algorithm was developed to estimate radial and circumferential strain in a cross-sectional view of in vivo carotid artery using noninvasive ultrasound. Carotid plaque can also be characterized using quantitative ultrasound (QUS), to assess the acoustic properties of tissue. Differences in acoustic properties may reflect difference in tissue composition. A novel approach is proposed whereby localized calcified, fibrous and lipid regions within heterogeneous plaque using a region-to-region registration with 3D histology and 3D attenuation coefficient was performed. QUS may also provide improved characterization of vulnerable plaque composition using direct localization of plaque regions and structure to histology.

A New Paradigm for Practical Maliciously Secure Multi-party Computation

Wang, Xiao University of Maryland, College Park ProQuest Diss 2018 해외박사(DDOD)

Secure Multi-Party Computation (MPC) protocols allow a group of mutually distrusting users to compute a function jointly on their inputs without revealing any information beyond the output. For many years, implementations of MPC protocols have t. This thesis introduces a new paradigm to construct extremely efficient MPC protocols with malicious security. In particular, this thesis consists of three major contributions. (1) We introduce the authenticated garbling framework, and present an.

A Study on Internal Control and Financial Risk

WANG XIAO 가천대학교 일반대학원 2021 국내박사

In recent years, China's capital market has developed rapidly and has become the first among emerging capital markets. Behind the rapid development of the capital market, the brilliant halo of many listed companies is no longer bright, falling into a financial crisis, being dealt with by the CSRC, and even withdrawing from the stock market. The change of the external operating environment and the defects of the internal management system will lead to the emergence of the financial risk of the enterprise, but the internal factors such as the internal control of the enterprise and the imperfect corporate governance structure have the leading role. Improving internal control is the most direct and effective way for enterprises to reduce financial risks, and it is of great significance to promote the long-term development of enterprises. This paper first constructs the relationship between internal control and financial risk from the perspective of overall risk management, and then expounds the containment effect of internal control on the source of financial risk from the perspective of internal control motivation and financial risk, as well as the five elements of internal control. On this basis, the paper puts forward the hypothesis that internal environment, risk assessment, control activities, information and communication and the five elements of internal supervision are negatively related to financial risk. Establish and evaluate the internal control quality index of listed companies, use the available internal control self-evaluation report and authentication report as the index assignment, take 300 Chinese A stock listed companies from 2016 to 2018 as samples, put forward the internal environment, risk assessment, control activities, information and communication, control activities, information and communication and the five elements of internal supervision. The results show that internal environment, risk assessment, control activities, information and communication and the five elements of internal supervision are negatively correlated with financial risk, among which the internal environment, control activities, internal supervision and financial risk are more significantly correlated.