고성능 델타-시그마 모듈레이터 설계

고대영 한양대학교 대학원 2022 국내석사

복잡한 집적회로 기술의 발전에 따라 주변 환경 및 다양한 기기와의 통신을 위해 여러 형태의 신호를 변환하는 기술의 중요성이 지속해서 커지고 있다. 이에 따라, 낮은 전력 소모와 높은 신뢰성을 가지는 저전력 고해상도 델타-시그마 모듈레이터의 연구가 활발하게 진행되고 있다. 본 논문에서는 높은 해상도를 가지는 3차 델타-시그마 모듈레이터 (delta-sigma modulator, DSM) 기법을 이용한 두 가지 응용 분야에 관하여 연구하였다. 저전력 기법들을 적용한 저전력 고해상도 아날로그-디지털 변환기 (analog-to-digital converter, ADC) 회로와 기준 클록이 포함하고 있는 시간 정보를 디지털 정보로 변환하기 위한 시간-디지털 변환기 (time-to-digital converter, TDC) 회로를 소개한다. 설계된 두 가지 회로는 28nm complementary metal oxide semiconductor (CMOS) 공정을 이용하여 제작되었다. ADC 회로의 OSR은 40이고 샘플링 주파수는 2MHz로 동작한다. 0.1~25kHz 신호 대역에서 signal-to-noise ratio(SNR)는 101.9dB를 달성하였다. 1V 공급 전압에서 640uW의 전력을 소모하며 칩의 면적은 0.28〖mm〗^2이다. TDC 회로의 OSR은 50이고 샘플링 주파수는 100MHz로 동작한다. 1MHz 주파수에서 노이즈 플로우는 -`98dB이고, 1V 공급 전압에서 사용 전력은 9.33mW이다. In this paper, two application fields using a high-resolution third-order delta-sigma modulator (DSM) technique is presented. A low-power high-resolution analog-to-digital converter (ADC) using continuoustime delta-sigma modulator structure and a time-to-digital converter (TDC) using discrete-time delta-sigma modulator structure are introduced. The two designed circuits were fabricated using a 28nm CMOS process. The ADC circuit has an OSR of 40 and a sampling frequency of 2MHz. The signal-to-noise ratio (SNR) in the 0.1~25kHz signal band achieved 101.9dB. The total power consumption is 640uW at 1V supply voltage and the chip area is 0.28 𝑚𝑚2 . The OSR of the TDC circuit is 50 and the sampling frequency is 100MHz. At 1MHz frequency, the noise floor is - 98dB, and at 1V supply voltage, the total power consumption is 9.33mW.

PVDF와 EVA 양이온교환 불균질막의 제조 및 탈염특성

고대영 忠南大學校 大學院 2016 국내석사

Recently, the use of ion exchange membranes has sharply increased. Ion exchange membranes are used in the following applications: desalting electrodialysis for water treatment, water splitting electrodialysis for the production of freshwater. In this study a heterogeneous cation exchange membrane was prepared by mixing ethylene vinyl acetate (EVA) and commercial cation exchange resin, Polyvinylidene fluoride (PVDF), commercial cation exchange resin and sulfonated poly(phenylene oxide)(sPPO) to determine the optimum preparation conditions and to compare the properties of this material to those of commercial membrane. A comparison of the heterogeneous cation exchange membrane and commercial membrane revealed that the added weight % of ion exchange resin higher than 70% to obtain enhanced physical properties such as the ion exchange capacity and electrical resistance. A tensile strength that was more than four times higher was also achieved in the heterogeneous cation membrane with a mixing ratio of 30:70. When EVA heterogeneous membrane, the superior electric properties were due to the excellent durability of the EVA resin. Therefore, based on the chemical and mechanical properties, the optimum mixing ratio of EVA and the ion exchange powder was 30:70, which resulted in an electrical resistance of 4~10 Ω⋅cm2, an ion exchange capacity of 0.8~1.0 meq/g, and a mechanical strength of 40~60 kgf/cm2. And when PVDF heterogeneous membrane, despite the weak durable membrane of PVDF resin, chemical and mechanical properties are considered, the optimum mixing ratio between PVDF, IER and SPPO were at 30 : 70, by which electric resistance was measured as 3~5 Ω⋅cm2, ion exchange capacity as 0.6~1.0 meq/g, while mechanical strength was in a range of 12~15 kgf/cm2.

2015, 2022 개정 교육과정 고등학교 ‘윤리와 사상’ 교과서의 퇴계-율곡 사상 서술의 양상 및 개선 방향에 관한 연구

고대영 국립공주대학교 교육대학원 2025 국내석사

Effective March 1, 2025, the 2022 Revised Curriculum officially began for first-year high school students in South Korea. A key feature of this curriculum is the High School Credit System which allows students to select and complete subjects based on their career paths and interests. For students choosing to take 'Ethics and Ideas' under this new system, their motivation will likely be a blend of external factors, such as favorable student record entries for university admissions and high grades, and strong internal interest in the subject itself. This heightened internal motivation underscores the critical importance of accurate knowledge delivery In the school setting, teachers are the primary conduits of knowledge, and they design their teaching and learning processes around textbooks. Therefore, it's crucial that textbook content accurately reflects the original intentions of the thinkers and aligns with their primary works. While the 'content elements' to be taught in 'Ethics and Ideas' are predefined, multiple publishers produce textbooks, leading to variations in how these elements are presented. Some publishers, however, may not provide descriptions that truly align with the original writings of the thinkers. Consequently, there's a clear need to analyze the current state of content description across different publishers and verify their consistency with the original works of the philosophers. This analysis would empower teachers to deliver accurate knowledge and help students minimize confusion arising from differing explanations across publishers. Furthermore, as the 2015 Revised Curriculum is phasing out and the 2022 Revised Curriculum is commencing, a comparative analysis of the textbooks from both curricula is timely and relevant. Although the 2015 curriculum is ending, second and third-year high school students in the 2025 academic year are still under its framework. Moreover, 'Ethics and Ideas' is typically offered in the second or third year of high school within the 2022 curriculum's structure, meaning full-scale classes under the new curriculum haven't yet begun. By thoroughly examining both curricula to identify improvements or areas needing revision, we can ensure a successful conclusion to the 2015 curriculum and a smooth transition into the 2022 curriculum. It's also worth noting that no 'Ethics and Ideas' textbooks for the 2022 Revised Curriculum have been officially approved by the Ministry of Education. Instead, only two recognized textbooks, approved by regional education offices, have been published. Given the high probability of more recognized 'Ethics and Ideas' textbooks being published by regional education offices in the future, this research could serve as a valuable guide for their future compilation.

현대국어의 후치사에 대한 연구 : '없이, 밖에, 말고'를 중심으로

고대영 성균관대학교 대학원 2006 국내석사

현대국어의 후치사에 대한 연구 -'없이, 밖에, 말고'를 중심으로-

가입자망의 대역제한방식에 관한 연구

고대영 목원대학교 2006 국내석사

Subscriber network is developing to Broadband Convergence Network(BcN) that increase of bandwidth and composition service by super high speed internet service subscriber's increase. BcN do offer 50~100Mbps bandwidth and communication broadcasting fusion service to Wire and Wireless subscriber. To subscriber network applies subscriber traffic of asymmetry form in network device of ethernet base that is consisted of symmetry, rate limiting is applied. Compared method about Rate limiting in technology connected with Quality of Service in subscriber network in this treatise that measure Performance through an experiment. Method of class rate limit did not consider subscriber bandwidth of lower column switch. This shows method of class rate limit do not consider subscriber of lower column switch in multi stage network that is amiss in rate limiting service. Method of MAC certification rate limiting uses MAC, although division of terminal that subscriber uses is available without considering subscriber's use bandwidth, dissipation according to subscriber's use bandwidth ratio occurred. In case terminal that Method of MAC certification rate limiting uses increases, embodiment and administration's complexity increase, and there is difficulty in integral management of subscriber unit. Method of Subscriber division rate limiting guaranteed subscriber's bandwidth who use bandwidth is less reducing gradually rate limiting as subscriber. Even if subscriber's terminal of method of subscriber division rate limiting increases, embodiment is easy and there is advantage that administration is easy.

有機物-無機物 界面 作用을 이용한 炭酸칼슘結晶 成長의 制御에 관한 硏究

고대영 高麗大學校 大學院 1998 국내석사

唐 前半期 줄다리기의 歷史的 性格 考察

고대영 忠南大學校 大學院 2019 국내석사

During the first half of the Tang Dynasty in China, peace was on the way after a long period of war, and various forms of play and folklore developed due to the open social climate. Especially tug-of-war(拔河) is concentrated in records during the emperor Zhongzong and Xuanzong's reign. The tug-of-war was a very unique example of folklore enjoyed by all Chinese at that time, from the general people up to the emperors during the period. In this regard, It is necessary to examine the phenomenon and the historical significance of prevalence of the tug-of-war in such a short period of time. The tug-of-war originated as a folklore in the mid-part of the Yangtze River region, and was originally part of military training. Since then, the tug-of-war has developed into a farming ritual to pray for good harvest. During the Tang Dynasty, it was transmitted to nearby regions and was prevalent throughout the country. Generally, participants were approximately between a hundred and a thousand, and small ropes were attached to the thick main rope to make it easy to pull. A flag was placed in the middle of the rope so that it was easy to judge. It was generally played on the Qingming Festival when the farming starts in earnest. In the private sector, hundreds of village residents played tug-of-war for the food and fortune rewards, pulling the rope in various ways, depending on the region. Meanwhile, in the imperial court, royal ladies or the dignitaries and generals performed the game to please the emperor. There is also a record that many thousands of emperor's soldiers were ordered to play the tug-of-war so that the emperor, bureaucrats, and even the generals and foreigners could enjoy. The tug-of-war in China in the first half of the Tang Dynasty was played as a festival and feast for the majority of the villagers, praying for good harvests, betting on food and money. Unlike other folklore and play events, hundreds to thousands people participating at one time would have played a positive role in bringing all the villagers together. In addition, it helped to strengthen the cooperation and the sense of belonging among the community members so that they could perform intensive role in agriculture before entering into full-scale farming. Furthermore, the soldiers in charge of armed services in the capital city also enjoyed playing the tug-of-war as a physical training and play. On the other hand, the tug-of-war played in the royal court had a strong political purpose, including strengthening the emperor's power. The emperor led the game, directing the royal ladies and dignitaries, but the emperor himself did not participate. Through the game, he confirmed his position as a master of the microcosm and its order, and his intention was to imprint the image of the monarch as an absolute person. In addition, he ordered his soldiers to play the game to accomplish two purposes by letting many domestic and international people see it. First, he wanted to show off Tang's strong national power through the tug-of-war game composed by a large group of a thousand people. In fact, it gave a strong impression to the foreign messengers and put them in a psychological pressure, according to the literary works. Second, the emperor Xuanzong was able to capture the power of the royal guards and his military. Through the game, he was able to compensate for the winners and to incorporate it as a solid base of his support. 중국의 당 전반기에는 오랜 전란이 끝나고 평화가 찾아왔으며, 개방적인 사회풍토로 인해 다양한 놀이와 민속이 발달했다. 특히 줄다리기, 즉 拔河(ba he)는 중종과 현종 치세 기간동안 집중적으로 기록에 나타나고 있다. 줄다리기는 동일 기간 동안 위로는 황제부터 아래로는 일반 백성까지 당시 중국인 모두가 즐겼던 민속으로 매우 독특한 사례이다. 이러한 줄다리기가 단기간동안 성행했던 현상과 그 역사적 의의를 검토할 필요가 있다. 줄다리기는 형초지역의 민속으로 기록에 따르면 원래 군사훈련의 일환으로 시작되었다. 이후 줄다리기는 풍년을 기원하는 농경의례로 발전하였는데, 당대에 이미 남방의 형초지역을 벗어나 당의 여러 지역에서 전승, 유행하였다. 참가자는 대체적으로 100~ 1,000여명에 이르며 가운데 굵은 줄에 작은 줄을 붙여 당기기 좋게 한다. 줄에 깃발을 두어 승패를 가리기에 용이하도록 한다. 시기는 대체로 본격적으로 농사가 시작되는 청명절에 행해졌다. 민간에서는 마을 주민들 수백명이 음식과 재물을 걸고 줄다리기를 하였고, 지역에 따라 조금씩 다른, 다양한 형태로 줄을 당겼다. 한편, 황실에서는 궁 내에서 황제의 지시로 궁녀들이 줄을 당기거나, 고관들과 장군들이 줄다리기를 행했고, 황제 역시 이를 보며 즐거워 했다. 또한, 황제의 친위대 군인들 천여명에게 명하여 줄다리기를 하게끔 하고, 이를 황제를 비롯하여, 관료와 장군, 외국의 번객을 포함한 수많은 사람들이 구경하였다는 기록이 남아있다. 중국 당 전반기의 줄다리기는 민간에서는 마을 주민들간 풍년을 기원하고 음식과 재물, 돈을 걸고 내기를 하는 등 마을 주민 대부분이 참여하는 하나의 축제이자 잔치로서 이루어졌다. 다른 민속이나 놀이 종목과 달리 한번에 수백~천여명에 이르는 참여인원은 마을 주민 모두를 하나로 묶어주는 긍정적인 역할을 수행했을 것이다. 또한 본격적인 농사에 들어가기 전인 청명에 집약적 농업을 할 수 있도록 마을 공동체 구성원간 협력과 공동체성을 강화하는데 일조했다고 볼 수 있다. 또한 장안에서의 숙위를 담당한 군인들 역시 하나의 체육이자 놀이로서 줄다리기를 즐겨 행했다. 한편, 황실의 줄다리기는 황제의 권력 강화를 비롯한 정치적인 목적이 강했다. 황제는 줄다리기를 주도하고, 궁녀들과 고관들에게 지시하되, 본인은 참여하지 않았다. 이는 줄다리기를 통해 소우주의 구현과 질서의 주재자라는 자신의 입지를 확인하고, 신하들에게도 절대자로서의 군주의 모습을 각인하려는 의도가 있었다. 아울러 황제의 친위대에게 줄다리기를 지시하고, 이를 수많은 국내외 인사들이 보게끔 함으로써 2가지 목표를 이룰 수 있었다. 우선 천여명에 이르는 대규모의 집단이 구성하는 줄다리기를 통해 당시 당의 강력한 국력을 과시할 수 있었다는 점이다. 당시 문학작품에도 남아있지만, 실제로 이를 통해 외국 사신들에게 강한 인상을 주고, 이들을 심리적으로 압박하는 효과를 거둘 수 있었다. 또한, 당시 황제인 현종이 권력을 잡고 황제에 등극할 수 있도록 했던 군사적 기반인 친위대, 북군을 이러한 줄다리기를 통해 장악하고, 승자에게 보상을 해주면서 확실한 본인의 지지기반으로 포섭할 수 있었다.

관리종목기업의 감사의견 및 이익조정에 관한 연구

고대영 전남대학교 대학원 2003 국내석사

본 연구는 1997∼2001년도에 관리종목으로 지정되어 증권거래소가 공시한 '2002년도에 상장폐지기준일이 도래하는 기업'을 대상으로 정상기업과 관리종목 기업의 감사의견 및 이익조정에 차이가 있을 것이라는 가설을 검증하였다. 두 집단의 감사의견 및 이익조정의 차이를 검증하기 위하여 각 연도별 관리종목으로 지정된 기업을 제외한 나머지 기업을 주요 통제표본으로 선정하였다. 두 집단의 감사의견 차이 여부를 검증하기 위해 관리종목지정여부와 감사의견을 변수로 하여 로짓모형을 사용하였고 이익조정 차이여부를 검증하기 위해 총발생액의 평균차이 검증, 회계이익과 현금흐름간의 상관관계 검증, 관리종목기업의 지정 전·후 총발생액에 대해 분산분석을 이용하였다. 실증분석 결과 두 집단간 감사의견의 차이는 관리종목기업일수록 비적정의견을 받을 가능성이 높은 것으로 나타났다. 지정 1년 전과 2년 전 모두 차이가 있는 것으로 나타났고 지정 전 3년은 차이가 없었다. 두 집단간 이익조정의 차이는 지정 1년 전, 지정연도, 지정 후 1년에 관리종목기업이 정상기업과 비교하여 오히려 회계이익을 감소시키는 방향으로 계상해 차이가 있는 것으로 나타났다. 회계이익과 현금흐름간의 상관관계는 관리종목기업이 지정 후 1년에 심각한 음의 상관관계를 나타냈다. 총발생액에 대한 분산분석은 관리종목기업이 지정시점을 기준으로 이익조정에 차이가 있게 나타난 반면 정상기업은 지정시점을 기준으로 차이가 나타나지 않고 전반적으로 차이가 있는 것으로 나타났다. This study investigated 85 Korean insolvent enterprises during the period 1997-2001 to confirm if there were diffrences in earnings management and audting opinion between the test group and the control firm. The logistic regression technique was applied to test differences of audit opinion between the test group and the control firm. I found that there were differences in audit opinion in the two years preceding the auditor designation. The result shows that the test group was given more adverse opinions than the control firm. In order to test difference in earnings management between the groups, this study used analysis of variance, analysis of correlation and t-test using TA(total accrual). I found that there were differences in earnings management in the preceding year, the year of auditor designation and the year following. The result shows that the test group tend to decrease reported earnings. Also, the test group appeared to seriously manage earnings in the year following.

Advances in demand analysis and forecasting of new products using discrete choice models and empirical applications

고대영 서울대학교 대학원 2007 국내박사

SiN passivation 이 HEMT 소자에 미치는 영향에 대한 연구

고대영 서울大學校 大學院 2002 국내석사