(The) effects of social identity as a second language user on college students' spoken english ability

임지완 Hanyang University 1999 국내석사

This study aims at confirming the concept of "social identity as a second language user": There are interaction effects between personal and social factors that affect second language learning. The study also asserts that the Socid Scale could predict college students' spoken English ability. Two general hypotheses were formulated. General Hypotheses Hypothesis 1: Interactions between personal and social sub-factors of the Socid Scale work jointly to influence learners' spoken English learning. Hypothesis 2: The Socid Scale is a predictor of college students' spoken English ability, i.e., listening comprehension and speaking proficiency. Each of the two general hypotheses mentioned above comprehends specific sub-hypotheses to be tested separately in the study. The subjects were 102 college students who had participated in PEC (Practical English for Communication) program taught by native speaker instructors at Hanyang University. Two-way ANOVA was used to test for interaction effects between personal and social sub-factors of the Socid Scale. The independent variable was the Socid Scale score and the dependent variables were college students' spoken English ability, i.e., listening comprehension (LC) and speaking proficiency (SP). Multiple regression was used to test the predictive power of the Socid Scale on spoken English ability. The control variables included EXP (travel abroad, English study abroad, live abroad, extra-curricula English conversation class) and KSAT (scores on the English part of the Korean Scholastic Aptitude Test). Results of the test were as follows: 1. The Socid Scale score correlated with the dependent variables, LC and SP score. (respectively, .340** and .549**, **p<.001) 2. Several interaction effects of paired combinations of personal and social sub-factors of the Socid Scale were shown. 3. The Socid Scale could be used to predict college students' spoken English ability and learning potential. As revealed above, Socid Scale could be used as an instrument to predict students' spoken English ability. It should also be considered that 'social identity as a second language ability' is a very important concept in learning and teaching English in Korea.

Survival Conditions of Strange Nuggets Formed in the Early Universe : 초기 우주에 형성된 strange nugget의 생존 조건

서인생 The Graduate School of Hanyang University 1990 국내박사

Social indentity as a second language user and its effects on second language learning

Kastner, Michael The Graduate School of Hanyang University 1998 국내박사

본 연구는 하나의 학습변수로서 제2언어 사용자의 사회적 정체성 개념을 제시하고, 의사소통중심 EFL학습환경에서 제2언어 사용자의 사회적 정체성을 측정함으로써 학습자 행동을 예측하고자 한다. 이와 같은 목적을 달성하기 위하여 본 연구자는 EFL환경에서 한국인 학습자의 사회적 정체성을 측정하기 위한 도구로서 세 가지의 개인적 요인과 두 가지의 사회적 요인이 포함된 Socid척도 (Social Identity as a Second Language User Scale) 를 개발하였다. 본 연구에서는 Socid척도를 활용하여 다음의 세 가지의 가설을 검증하고자 하였는데, 이는 첫째, 사회적, 개인적 학습변수 들간에는 상호작용이 있으며, 둘째, Socid 척도는 학습자의 학습참여 및 활동을 예측해주고, 셋째, Socid척도는 학습자 성취도를 효과적으로 예측해 준다는 것이다. Socid 척도의 개인적 변수와 사회적 변수 간의 상호작용 효과를 검토하기 위해서는 이원변량 분석이 사용되었다. 6명의 영어 모국어 사용자가 교수자로 있는 수업에 참여한 340명의 학생들을 대상으로 한 분석 결과는 사회적 변수는 개인적 변수와 상호 작용하여 제2언어습득의 학습에 영향을 끼친다는 것을 보여준다. Socid 척도의 학습참여 및 학업성취도 예측능력 측정을 위해서는 교수자들의 평가와 학습자들의 자기평가 보고서를 종속 변인으로 삼아 다중회귀분석 방법을 적용하였다. 지금까지의 제2언어 습득 연구 분야에서 사회적 정체성에 관한 연구가 많지 않기 때문에 본 연구에서는 사회적 정체성 개념의 근원과 관련된 문헌들을 사회과학 측면에서 고찰하고 이를 제2언어 습득 분야에 적용시켜보고자 하였으며, 한국에서의 영어교육 및 학습에 대한 실제적 적용을 시도하였다. The study proposes the concept of “social identity as a second language user” as a learner variable that influences second language learners’ readiness and willingness to use the second language (i.e., English) and therefore to learn it better. An instrument was developed to measure Korean EFL learners’ social identities as English language users. The validity and reliability of the instrument, called the Socid Scale (Social Identity as a Second Language User Scale) was tested through Factor analysis, the Cronbach test of scale reliability, and through consultation with experts in second language education. The Socid Scale includes five sub-factors, three of which are labeled “personal” and three of which are labeled “social” in nature. The Socid Scale was used to test three major hypotheses: 1) There are interaction effects among social and personal learning variables that contribute to second language learning. 2) The Socid Scale is a predictor of classroom active participation (learning behavior) in using the second language communicatively. 3) The Socid Scale exerts direct and intervening effects on second language learning. The sample included 340 male, college freshmen, (all engineering majors) who had participated in a communicative EFL program taught in 16 learning groups by six native speaker instructors at Hanyang University. Factorial analysis of variance (using two-way ANOVA) was used to test for interaction effects between paired combinations of personal and social sub-factors of the Socid Scale. The dependent variables included listening and reading comprehension scores, active participation in class activities as measured by native speaker instructors and self-reports of students, and student course grades in a communicative EFL college class taught by a native speaker instructor. To test the Socid Scale's power to predict active participation in communicative EFL classes, multiple regression analysis of evaluation scores of native speaker instructors and of self-reports by participants concerning their active participation in their EFL classes were done on the Socid Scale along with control variables. The control variables included background experience in learning and using English and scores on the English part of the Korean Scholastic Aptitude Test (KSAT). Multiple regression analysis was again used to test the third major hypothesis. This time the two variables representing active participation were entered into the equation as independent variables along with Socid and the other control variables with the dependent variables (listening comprehension, reading comprehension, course grade, and so forth). In this way the direct and intervening effects of Socid on the dependent variables could be ascertained. Each of the three major hypotheses included specific sub-hypotheses that are stated and tested separately in the study. Results of most of the tests were encouraging and supported the hypotheses.

International Comparative Study of Policies to Introduce and Implement Electric Vehicles in the Taxi Service. : 택시 서비스의 전기자동차 도입 및 운영 활성화 정책의 국제비교 연구

EDWIN ALONSO VACCA MELO HANYANG UNIVERSITY GRADUATE SCHOOL OF URBAN STUDIE 2017 국내석사

Abstract in Korean 본 연구는 택시 서비스에 전기 자동차를 도입하기 위한 가장 적절한 공공 정책을 규명하기 위하여 일부 국가의 공공 정책을 분석하는 것을 목적으로 한다. 이 분석을 위하여 중국, 미국, 노르웨이, 한국 등 4 개 국가가 선정되었다. 이번 비교 및 설명 연구를 위해 선택된 4개의 국가 중 앞에 세 개의 국가는 각기 다른 대륙(아시아, 아메리카 및 유럽) 에서 2016 년 12 월까지 경량 플러그인 전기 자동차 글로벌 판매 건수에 따라 선정되었다. 해당 기준은 세계 각극의 공공 정책 효과와 직접적인 연관이 있는 지표이기 때문에 전 세계 3 대 국가 선정 기준으로 세계 전기 자동차 판매량이 지적됐다. 중국의 경우, 전세계 경량 플러그인 전기 자동차의 최대 판매국가 일뿐만 아니라 전세계에서 가장 많은 이산화탄소 배출국이며 최대 자동차 생산국가로서 선정이 되었다. 반면에 미국은 중국의 바로 뒤를 잇는 경량 플러그인 전기 자동차 판매 순위2위 자리를 차지하고 있다. 또한 미국은 세계에서 두 번째로 큰 연소 자동차 생산국이자 이산화탄소 배출 국가이다. 마지막으로, 노르웨이는 2013년부터 2016년 사이에 신차 총 판매량 중 경량 플러그인 전기차 판매 점유율이 전세계에서 4위, 유럽에서는 1위를 차지한다. 또한 노르웨이는 전세계에서 도시 오염이 가장 덜한 국가 중 하나이다. 4개국가 중 도시 오염이 가장 심각한 나라는 한국이다. 한국은 세계에서 여섯 번째로 큰 자동차 생산국 일뿐 아니라 본 연구가 한국에서 이루어졌기 때문에 비교국가에 포함되었으며 맥락적인 부분으로서 분석에 유용하였다. 이 조사에서는 선택된 4개 국가들의 각기 다른 공공 정책의 각 단계의 시작과 종료 일자뿐 아니라 각국의 전기 자동차 판매량, 목표 달성도를 비교했다; 이 연구의 대상 국가들에서 그것이 존재할 때와 그 날짜, 충전소 수, 충전소 당 소형 전기 자동차의 수, 이들 국가에서 택시로 사용되는 전기 자동차에 대한 프로그램이나 전기 자동차의 시장이 포함되다. 선별 된 각 국가의 분석을 보충하기 위해, 전기 차량에 대한 지방 정부 정책에 대해보다 이해를 돕고 심층적 인 연구를 수행하기 위해 특정 지역을 사례 연구로 선정했다. 이 지역은 미국의 경우 캘리포니아, 중국은 베이징, 노르웨이의 경우 오슬로, 한국은 제주도이다. 2차 데이터 분석이 이 연구에 사용 된 기법 이다. 이 연구의 공공 정책 비교 분석을 위한 보조 데이터는 정책 문서, 신문 및 전문 잡지 기사, 연구 보고서 및 정부 보고서를 기반으로했다. 전기 자동차 판매량, 목표성취, 충전소 수, 충전소 당 전기 자동차 수, 전기 자동차의 택시로 사용되는 프로그램 또는 정책의 존재 여부, 전기 자동차의 시장 점유율 등의 수집 된 비교 및 요약 부가 데이터는 표 형식으로 등록되다. 이 연구를 마치는 시점에는 이들 4 개국의 가장 효과적인 공공 정책 관행을 참고하여 연소 모델 자동차와 유사한 사양의 전기 자동차의 가격을 줄이고 보상하는 방안을 중심으로 택시 서비스에 전기 자동차를 도입하는 가장 적절한 공공 정책을 선별하는 것이 가능해질 것이다. 주요 용어: 택시 서비스, 전기 자동차, 정책. Abstract International Comparative Study of Policies to Introduce and Implement Electric Vehicles in the Taxi Service Edwin Alonso Vacca Melo Department of Urban and SOC Planning Graduate School of Urban Studies Hanyang University Advised by Professor Jeong Hyun Rho Combustion taxis are one of the leading cause of air pollution but cleaner vehicles can help to solve this issue. One of these cleaner vehicles is the electric car. An electric car is an automobile moved by an electric motor which uses electric energy stored in a rechargeable battery. One special characteristic of the electric vehicles over the combustion cars is that the electric motors are approximately three times as efficient as combustion motors. On the other hand, hydroelectricity dams do not burn any fossil fuels, they are claimed to not directly produce pollutants. Hydroelectricity produces the least number of externalities of any other kind of electric power generation and the cost of hydroelectricity is relatively low compared with other energy sources. Consequent to this order of ideas, to prevent the emissions because of the internal combustion taxis, to replace them with electric vehicles moved by renewable energy, it is necessary to identify the most appropriate public policy to introduce electric cars in the taxi service in terms of economic and non-economic incentives. The methodology used in this research was comparative policy analysis. Qualitative case-oriented study is the research approach of this investigation. This study aims to analyze the public policies of the selected countries with the intention of identifying the most appropriate public policies to introduce electric cars in the taxi service. Four countries were selected for this analysis which are China, United States, Norway and South Korea. As complement to the analysis of each one of the chosen nations, one specific local area was selected as a case study in order to do a more comprehensive and deeper research for the local governmental policies for the plug-in electric vehicles. These local places are California for the United States of America, Beijing for China, Oslo for Norway and Jeju Island for South Korea. The technique used for this research was the analysis of secondary data. The secondary data for the comparative public policy analysis of this research was based on policy documents, newspaper and specialized magazines articles, research reports and governmental reports. The analyzed secondary data items of number of sales of electric cars, milestone achievement, number of charging stations, number of electric vehicle per charging stations, the existence of programs or policies for electric cars as taxis in these countries and share market of the electric cars were registered in tables which were the instrument for the analysis and abridgment the collected data. In a more specific policy measurement in this research, five categories were analyzed. These five categories are regular incentives, direct consumer incentives, indirect consumer incentives, charging infrastructure, and complementary policies. Based on this comparison it is possible to conclude the following: Regulatory incentives for the case of Bogota are, to replace the approximately 50,000 combustion taxis for battery electric vehicles and reduce the 3,080 tons of CO2 emitted per day. In the case of direct consumer incentive, the exoneration of registration tax and the exemption of VAT for battery electric vehicles, and the subsidy for BEV until making equal the price of the electric taxi with a similar combustion car model, are the policies selected as the most appropriate public subvention to promote the use of electric cars in the taxi service in terms of economic incentives. For the indirect consumer incentives, free or lower charging costs is an incentive that encourage the use of battery electric vehicles as taxis because it increases the earnings of this business model offering an indirect economy benefit. In the incentive category of charging stations, subventions for home charging points and for apartments edifices, charging stations in public parking lots, charging points each one in a radius of at least two kilometers in the metropolitan area and high inversion in fast public charging infrastructure, are the most accurate incentives in this category, especially high inversion in fast public charging infrastructure because electric vehicles in the taxi service are assets that need electric energy to produce money, therefore, if the electric taxi takes a long time for recharging it will mean a loss of money. For the last incentive category, the complementary policies of the mock sound of a combustion engine, reduction of petroleum dependence, development of new technologies to reduce the cost of the electric vehicles and increase their autonomy are the best incentives in this category for the battery electric vehicles in the taxi service. Keywords: internal combustion taxis, electric car, public policies, economic and non-economic incentives, taxi service.

(A) study on the performance evaluation of precast concrete without steam curing by use of calcium based hardening accelerator

민태범 Hanyang University 2015 국내박사

ABSTRACT A Study on the Performance Evaluation of precast concrete without steam curing by use of calcium based hardening accelerator Min, Tae Beom Dept. of Frontier Architectural and Urban Environmental Engineering The Graduate School Hanyang University Researches have been mainly focused on aspects of structures and construction like improvement of structure performance of connectors, prestress introduction, Half PC and efficiency of lifting, but has shortage on concrete material. Especially, for precast concrete, steam curing is widely used in construction site and this method in particular is mainly used to speed up the curing process to achieve early strength of concrete in the production of precast concrete and is done for 12 h per days. Thus the problem that a large amount of energy is consumed is raised. Additionally, the production of precast concrete member needs expensive steel forms to use in an efficient and fast procedure so as to reduce the initial cost of production generally. Under this background, this study focused on the development of compressive strength of concrete without steam curing. Various experiments were conducted to produce more than 10 MPa as early-stage strength at age of 6 h curing at room temperature without steam curing using hardening accelerator and high early strength cement that containing high C3S. This thesis is composed of 6 chapters with the purpose of development of precast concrete without steam curing, contents of each chapter is given below. Chapter 1 covers background, necessity, purpose and method. Chapter 2 covers production process of process and existing research about early compressive strength of concrete. Chapter 3 deals with suggestion of experimental analysis on performance evaluation of hardening accelerator, its mechanism with high early portland cement and provned cement hydration mechanism. Chapter 4 covers mixing technology and application of site performing mock-up test with precast concrete satisfying 10 MPa within 6 hours based on concrete quality required in its plant to develop precast concrete without steam curing. Chapter 5 deals with economic and CO2 evaluation of precast concrete. Chapter 6 contains summary of results of this study as follows. 1. Suggestion for hydration mechanism of hardening accelerator and high early portland cement 1) Hardening accelerator enhances development of compressive strength by stimulating C3A, C4AF initially, and stimulating C3S from 2 hours age. 2) Increasement of initial compressive strength by using calcium hardening accelerator is been measured because main component of hardening accelerator, Ca2+ ion, is dissolved, makes faster reaching on supersaturation and then stimulates C3S initially.

中性微子 質量과 中性微子 振動

김종복 Graduate School, Hanyang University 1983 국내석사

(A) study on university technology holding company in Korea : strategy and policy implication

Kim, Young-Kook Hanyang University 2016 국내석사

AN LFG APPROACH TO ANAPHORA : THE CASES OF KOREAN AND ENGLISH

노명헌 HANYANG UNIVERSITY 1987 국내박사

波動間의 非線形 相互作用에 對한 攝動分析

Han, Kook Yong Graduate School, Hanyang University 1984 국내석사

AMOLED 패널 측정 시스템을 위한 소면적 고해상도 범용 데이터 드라이버 IC : A Small-Area and High-Resolution Universal Data Driver IC for AMOLED Panel Test Systems

설현천 Hanyang University 2017 국내박사

Active-matrix organic light emitting diode (AMOLED) displays have been highlighted as alternatives to liquid crystal displays (LCDs) due to their outstanding performance including high contrast ratio, fast response time, wide viewing angle, and high color reproducibility. Moreover, since AMOLED displays do not require a backlight unit, they can be manufactured in a light and thin form factor, thereby being widely employed in multimedia products. However, the non-uniform electrical characteristics of thin-film transistors (TFTs) and OLED degradation, which deteriorate image quality, prevent AMOLED displays from dominating the display market. To solve these issues, various external compensation systems have been studied. To implement an accurate external compensation system, its driving and sensing ranges should be properly determined according to the initial variations in the electrical characteristics of the TFTs and OLEDs of the target panel. Therefore, a panel test system that can accurately measure the initial variations in electrical characteristics is necessary for testing prior to assembling the external compensation system with the panel. However, since conventional panel test systems have been developed only for panels with specific backplane structures, they cannot be used for panels with various backplane structures and should be redeveloped whenever a new AMOLED panel with a different backplane structure is made. This leads to an increase in the research-and-development cost and the turn-around time for developing AMOLED displays. Therefore, this dissertation proposes a panel test system including small-area and high-resolution data driver ICs, a general purpose architecture for various backplane structures, and a fast and accurate measurement method to achieve high-image quality and low-development cost of AMOLED displays. First, an area-efficient and high-resolution resistor-string digital-to-analog converter (R-DAC) with a reverse ordering scheme is proposed. The proposed R-DAC is designed in a two-stage DAC along with a DAC-embedded amplifier. The proposed reverse ordering scheme decreases the area of the proposed R-DAC, which occupies most of the area of the data driver IC. To verify the proposed reverse ordering scheme, a 640-channel data driver IC with a 12-bit two-stage DAC was fabricated using a 0.18-μm CMOS process with 1.8 V and 18 V devices. The fabricated 12-bit two-stage DAC consists of a 10-bit R-DAC with the reverse ordering scheme and a 2-bit DAC-embedded amplifier. The proposed 10-bit R-DAC occupies only 50.1% of the area of the conventional 10-bit R-DAC. Measurement results show that the differential nonlinearity and integral nonlinearity are +0.25/-0.26 LSB and +0.54/-0.42 LSB, respectively. The measured inter-channel and inter-chip deviation of voltage outputs are 2.40 mV and 7.42 mV, respectively. Second, a small-area and low-power data driver IC using a two-stage DAC with a capacitor array is proposed. The proposed data driver IC employs a capacitor array in the two-stage DAC so as to both decrease the DAC area and eliminate the need for the resistor-string, which has high power consumption. To verify the proposed two-stage DAC, a 20-channel data driver IC with the proposed 10-bit two-stage DAC was fabricated using a 0.18-μm CMOS process with 1.8 V and 6 V CMOS devices. The proposed 10-bit two-stage DAC occupies only 43.8% of the area of a conventional 10-bit two-stage DAC. Measurement results show that the differential nonlinearity and integral nonlinearity are +0.58/-0.52 LSB and +0.62/-0.59 LSB, respectively. The measured inter-channel deviation of the voltage outputs is 8.8 mV, and the measured power consumption of the 20-channel data driver IC decreases to 7.1 mW, which is less than half of the power consumed by the conventional one. Finally, a test system for AMOLED panels with various backplane structures with external compensation method is proposed. The proposed AMOLED panel test system employs universal data drive ICs to measure the current of a driving TFT and the anode voltage of the OLED in various backplanes by only programming the field-programmable gate array in the proposed test system. The universal data driver IC is fabricated and implemented in the proposed AMOLED panel test system whose test board is assembled with a 55-inch full high-definition AMOLED panel. A fabricated universal data driver IC includes 640 data channels with a 12-bit linear gamma DAC and 12-bit variable current sources. To evaluate the repeatability error of the proposed panel test system, the driving TFT current is repeatedly measured and the measured maximum repeatability error is 9.8 nA. Moreover, to evaluate the measurement accuracy of the proposed panel test system, the variation in the currents of the driving TFTs are measured and compensated for, and its maximum value after compensation is measured to be 26 nA.