(A) study on the analysis of obstruction factors to effectiveness of the EU blue card directive

Zang, Yul Simong Hankuk University of Foreign Studies. Graduate Sch 2014 국내석사

Sitz und Verlegung des Sitzes einer Europaischen Aktiengesellschaft mit Sitz in Deutschland

Zang, Axel Peter Lang 2005 국내박사

Understanding consumers' responses to a shoppable social media platform

Zang, Xuan 고려대학교 대학원 2019 국내석사

This paper is focus on investigating consumers’ responses toward a shoppable social media. The author differentiates the definition between social commerce and social media commerce. By the development of social networking technology, the existing electronic-commerce platform have been added a function that consumers can communication with other buyers and share their opinion toward the product. It is the typical direction or the opportunity for the electronic commerce platform. However, when we talk about social media, many consumers may consider it as a community to share their lifestyle, follow the famous people, or it is a platform for building a good social networking interpersonally. Thus, when commerce has been blended into social media platform, so many marketers have been started to sell the product to social media users. Thus, this curiosity makes the author selected this academic direction. The research model was built based on theory of reasoned action (TRA) and technology acceptance model (TAM) model. The main antecedents (independent variables) were included in the model, which are perceived compatibility, perceived personality, perceived social value, perceived enjoyment and perceived usefulness and the dependent variable was consumer’s intention to purchase. The result showed that perceived compatibility and perceived social value were positively related to perceived enjoyment and perceived usefulness. In terms of perceived personalization, this antecedent was positively related to perceived usefulness and satisfaction. And all the relationship was supported the hypothesis. It can be illustrated that consumers consider the shopping behavior as one of their daily life. Thus, they would like to consume anything based on their lifestyle. Secondly, people always glance more on the personalized content. The algorithm calculated the content based on their searching behavior, which can be a gateway to save time in terms of shopping. Social value plays an important role when consumer shop online. This concept can link with electronic word-of-month (EWOM). These findings both bring practical value and academic value.

주한미군 전략적 유연성 논쟁과 중국의 인식

Zang, Qian 고려대학교 대학원 2008 국내석사

미국은 2000년 말 부시 대통령이 당선되면서부터 해외주둔 미군을 유연하게 배치해, 세계 어디에서든 신속하게 대응할 수 있도록 하는 해외주둔미군재배치계획(GPR)을 추진하였다. 이 계획은 미국 정부가 21 세기 새로운 안보환경에 맞추어 추진하는 해외주둔 미군의 전면적인 개편계획으로, 유사시 해외에 주둔하고 있는 미군을 세계 곳곳의 분쟁지역에 신속하게 파견해 전쟁임무를 수행할 수 있도록 하는 계획이다. 미국은 도전하는 중국과의 대규모 전쟁은 물론 다수의 불량국가들과의 소규모 전쟁 그리고 비국가 행위자들의 다양한 초국가적 위협행동 등 다양한 지역과 확대된 분쟁 스펙트럼에 대응한 군사태세를 정비하려 한다. 이와 같은 맥락에서 부시 행정부는 GPR을 추진하는 차원에서 주한미군의 조정-한반도내 재배치, 임무와 역할 조정 등의 문제를 ‘전략적 유연성’관점에서 접근하고 있다. 전략적 유연성은 주한미군이 더 이상 북한의 남침에 대비하는 붙박이 군이 아니라, 주한미군을 동북아 신속기동군으로 재편해 중국과 대만분쟁을 비롯한 동북아시아와 기타 분쟁지역에 투입하는 방향으로 전개되고 있다. 중국은 이러한 합의가 동북아 군사구조에 심각한 변화가 발생할 것임을 예시한 것으로 받아들였다. 중국은 주한미군의 전략적 유연성이 아태지역에서의 미국의 군사적 우위를 더욱 강화시킬 것이라는 우려를 견지해 왔다. 또한 전략적 유연성에 대한 한미 간의 합의로 인해 주한미군이 북한의 위협에 대응하는 ‘지방군’에서 동아시아에서 미국의 전략목표를 달성하는 ‘기동부대’가 되었다고 본다. 특히 중국은 전략적 유연성이 향후 주한미군으로 하여금 대만해협에서의 충돌에 개입할 수 있는 토대를 마련했다고 간주한다. 게다가 미국은 주한미군과 주일미군의 연계를 강화하고 있으며 한미동맹이 한반도 방어 중심의 국지 동맹에서 광역 동맹으로 바뀔 가능성도 없지 않다. 중국의 입장에서 주한미군의 전략적 유연성은 앞으로 미중간의 갈등의 소지가 될 수 있을 뿐만 아니라, 동북아 지역에서 분쟁이 증폭될 수 있는 새로운 요인으로 봐야 한다. 이와 같은 관찰을 바탕으로 본 연구는 중국의 입장에서 주한미군의 전략적 유연성에 대한 안보질서의 변화를 분석하고 중국의 전략적 대응을 전망하는 데에 목적이 있다. From Bush president was elected in 2000, U.S. promoted GPR which make a new arrangement of their overseas troops and aim to have them flexible enough can respond quickly anywhere. It is a overall restructuring plan of the U.S. overseas troops's posture to have them meet the 21st century’s new security environment, and can be quickly dispatched to anywhere around the world that the emergencies and conflicts are in. U.S. are trying to modulate their military posture to prepare the large-scale war with China, the challenges with small rogue countries, and a variety of threats with supranational actors. In the same context, Bush administration adjusted U.S. troops stationed in the South Korea approached by ‘strategic flexibility’ concept, including the military posture of the Korean peninsula, the troops' s mission and role. USFK would be arranged to become a maneuver force, is not only a built-in troops to contrast the North Korea's military threat, but also respond quickly with China, Taiwan dispute and any other threats in Northeast Asia or other areas. China thinks that USFK' s strategic flexibility agreement is a potential cause that would change the military force structures in Northeast Asia in the future. And China has been hold a point that U.S. military force of the Asia-Pacific region would be reinforced by USFK's strategic flexibility. In addition, China insisted that USFK would be a maneuver force in east Asia area to achieve U.S. strategic object by this agreement. In particular, China recognized that strategic flexibility of U.S. forces would make USFK to intervene the conflict in the Taiwan Strait. Based on such observations, this research is in order to analysis the regional security changes caused by USFK's strategic flexibility and seek out the china’s strategic measure.

Erythropoietin receptor signaling pathways

Zang, Hee-suk UMI Dissertation Services 2002 국내박사

(The) comparison of consumers' perception on luxury fashion brands between South Korea and Panama

Zang, Sonia Yau Daejeon University 2017 국내석사

Study for Prediction the Door Checker Effort by using 2D-Contact

Xiaokang Zang 한양대학교 2016 국내석사

With the development of the automotive industry, people are eager for better vehicle capability. One of them is the door opening and closing performance. Proper door effort opening and closing a vehicle can insure safety for passenger and pedestrian, while ensuring door operating convenience. Since checker effort is the important design parameter to determine door performance, analysis for a vehicle door checker effort is one section in early design with the door. In order to predict checker effort more accurately and rapidity for engineering applications, this thesis developed a new algorithm, applying the 2-dimension method to analyze the model by using dynamic analysis software DAFUL. Finally, this 2-dimension method has been verified with the comparable results between the analysis results and experimental results.

Deep reinforcement learning driven aggregate flow entries eviction in software defined networking

Junhan Zang Sungkyunkwan University 2023 국내석사

Software Defined Networking (SDN) isolates control from network parts and logically centralizes it in SDN controller to give global network control. Network devices like switches only forward data using flow tables installed by the controller. Managing flow tables' limited capacity is ongoing. Several research have explored eviction procedures to make room for new entries in flow tables, but all presume 1:1 entry-to-incoming-flow mapping. This assumption is flawed, as in real networks several incoming flows can be handled by a single Aggregate Flow Entry (AFE). This paper proposes a DRL framework to evict AFEs. The suggested framework calculates the degree of AFEs (i.e., how many flows it entertains) together with other factors to evict AFEs and minimize flow table overflows. The suggested framework decreases overflows by 37%, flow reinstallation by 87%, and control signaling overhead by 45% compared to Random and Least Recently Used Algorithm (LRU). SDN은 소프트웨어를 활용하여 네트워크를 중앙화된 컨트롤러에서 제어하는 방식이다. SDN은 기존 네트워크와 달리 컨트롤 플레인과 데이터 플레인을 분리하여 컨트롤러에서 스위치를 관리할 수 있게 한다. 스위치와 같은 네트워크 요소는 컨트롤러가 설치한 플로우 테이블의 항목을 데이터로 전달한다. 플로우 테이블의 용량은 제한적이며 지속적인 관리가 필요하다. 여러 SDN 연구에서 플로우 테이블에 새 엔트리를 위한 공간을 만들기 위해 방출 전략을 제안했지만 하나의 플로우는 하나의 엔트리와 대응되는 1대1 가정을 사용하고 있다. 실제 네트워크에서 많은 수신 흐름이 단일 AFE로 처리될 수 있으므로 이 가정은 주요 제한 사항이다. 이 논문에서는 AFE 제거를 위한 DRL 프레임워크를 제안하여 이러한 제한 사항을 극복하고자 한다. 제안된 프레임워크는 방출를 위해 AFE를 선택하기 위해 다른 매개변수와 함께 AFE의 연결도(얼마나 많은 플로우가 포함되는지)를 계산합니다. 여기서 주요 목표는 플로우 테이블 오버플로를 최소화하는 것입니다. 제안된 프레임워크는 전통 방식에 비해 오버플로 수를 37%, 흐름 재설치를 87%, 제어 시그널링 오버헤드를 45% 줄이는 것으로 나타났습니다.

Function and localization of myosin II during cytokinesis in Dictyostelium discoideum

Zang, Ji-Hong Stanford University 2000 해외박사(DDOD)

Work described in this thesis investigates the cellular function and localization of myosin II during cytokinesis in <italic>Dictyostelium discoideum</italic>. To investigate myosin II's role during cytokinesis, I examined <italic> Dictyostelium</italic> myosin II null cells under different conditions with the help of collaborators. Myosin II null cells could not form a furrow after mitosis under non-adhesive conditions. However, given an adhesive surface, they divided with morphologies similar to wild type cells. Therefore, there is an alternative mechanism of division that is myosin II independent and adhesion dependent. To study the molecular mechanism of myosin II's localization in the furrow region during cytokinesis, I examined several <italic>Dictyostelium</italic> myosin II mutants. An examination of a mutant myosin II in which both light chain binding sites are deleted reveals that the light chains are not essential for myosin II function or localization. To determine whether myosin motor function is required for its proper localization, I examined the localization of a mutant, GFP-loop2 myosin, which has no detectable ability to move actin filaments in an <italic>in vitro</italic> actin motility assay. However, it still localized to the cortex of the cleavage furrow during division on an adhesive surface, demonstrating that the motor activity of myosin II is not required for its cellular localization. To investigate whether actin binding ability is required for myosin II localization, I further examined the localization of a chimera, GFP-RLC-myosin rod, in which GFP replaces the motor domain of myosin II. Surprisingly, it still localized to the cleavage furrow region during cytokinesis on a surface, ruling out the more popular models of myosin II localization that require myosin to interact directly with actin. Experimental evidence has pointed to the importance of the bipolar thick filament form of myosin II for localization. A mutant myosin II lacking the C-terminal 34 kD of the tail is conjectured to be monopolar but is a functional myosin <italic>in vivo</italic>. To resolve this apparent paradox, I determined the structure of the ΔC34 myosin filament and found it to be bipolar. Therefore, the importance of bipolar thick filament formation in myosin II function and localization remains unchallenged.

Advanced Computational Methods for High-accuracy Refinement of Protein Low-quality Models

Zang, Tianwu ProQuest Dissertations & Theses Rice University 2016 해외박사(DDOD)

Predicting the 3-dimentional structure of protein has been a major interest in the modern computational biology. While lots of successful methods can generate models with 3∼5A root-mean-square deviation (RMSD) from the solution, the progress of refining these models is quite slow. It is therefore urgently needed to develop effective methods to bring low-quality models to higher-accuracy ranges (e.g., less than 2 A RMSD). In this thesis, I present several novel computational methods to address the high-accuracy refinement problem. First, an enhanced sampling method, named parallel continuous simulated tempering (PCST), is developed to accelerate the molecular dynamics (MD) simulation. Second, two energy biasing methods, Structure-Based Model (SBM) and Ensemble-Based Model (EBM), are introduced to perform targeted sampling around important conformations. Third, a three-step method is developed to blindly select high-quality models along the MD simulation. These methods work together to make significant refinement of low-quality models without any knowledge of the solution. The effectiveness of these methods is examined in different applications. Using the PCST-SBM method, models with higher global distance test scores (GDT_TS) are generated and selected in the MD simulation of 18 targets from the refinement category of the 10th Critical Assessment of Structure Prediction (CASP10). In addition, in the refinement test of two CASP10 targets using the PCST-EBM method, it is indicated that EBM may bring the initial model to even higher-quality levels. Furthermore, a multi-round refinement protocol of PCST-SBM improves the model quality of a protein to the level that is sufficient high for the molecular replacement in X-ray crystallography. Our results justify the crucial position of enhanced sampling in the protein structure prediction and demonstrate that a considerable improvement of low-accuracy structures is still achievable with current force fields.