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LCD 디스플레이에 적용 가능한 오토제로 방식과 핑퐁 방식을 혼합한 새로운 옵셋 저감 회로 설계
김한슬(Hanseul Kim),손상희(Sang-Hee Son) 한국정보기술학회 2013 한국정보기술학회논문지 Vol.11 No.10
In this paper, new structure is proposed to compensate for the shortcomings of offset voltage cancellation circuit of operational amplifier in previous auto-zero method. Proposed circuit has two offset cancellation circuit operating in auto-zero method and offset reduction is accomplished by controlling them with ping-pong mode. So, offset voltage cancellation is realized more effectively contrast to the previous auto-zero method. Circuit simulations are executed with the design rule of TSMC 1.8V, 0.18㎛ CMOS process and Cadence Spectre simulator. From the simulation results. It is verified that offset voltage of operational amplifier with 30mV is reduced to under 1mV. So, it is confirmed that proposed circuit is effective for compensation of offset voltage. Also, proposed circuit is reducing the offset voltage continuously and so it generates the stable output waveform compared to the previous method. Additional frequency modulation circuit is not needed in proposed circuit because it is not necessary to control the duty ratio in sampling phase. So, proposed offset cancellation circuit is suitable for buffer of LCD display panel.
「동의보감」 精 氣 神론에 근거한 한방무용치료프로그램의 치료적 가능성에 관한 연구
김한슬 ( Hanseul Kim ),윤미라 ( Mira Yoon ) 한국무용과학회 2021 한국무용과학회지 Vol.38 No.4
본 연구는 각기 다른 분야인 한의학과 무용치료의 두 가지 학문적 특징에 따른 한방무용치료의 공통적인 접점원리를 살펴본 후, 한방무용치료라는 학문적 영역에 관한 이론적 틀을 확립시키고 그에 따라 건강증진을 위한 한방무용치료프로그램의 치료적 기능과 역할, 예방의학으로써 치료적 가능성에 대한 문헌적 토대를 마련하기 위해 수행되었으며 그 결과는 다음과 같다. 첫째, 「동의보감」 精 氣 神론과 동양의학 사상을 바탕으로 한 한방무용치료의 원리를 고찰하고, 이 원리를 적용한 ‘산조 기무’와 ‘오행경혈기무’를 제시함으로서 이들이「동의보감」精 氣 神론과의 연관성을 통해 치료적 요소를 제시할 수 있도록 이론에 근거하여 귀납하였다. 둘째, 한방무용치료프로그램을 수행함에 있어서 개개인의 건강증진 및 삶의 질 향상에 영향을 미칠 수 있을 것으로 기대된다. 본 연구를 통하여 한방무용치료프로그램의 포괄적인 필요성 및 치료적 가능성이 더 나아가 예방 의학으로써 적합한 선진성 제고를 위하여 후속연구에 중요한 예측요인이 되었다는 것으로 판단되며 더 많은 연구가 진행되기를 기대해본다. This study was conducted to systematically establish theoretical principles and lay the groundwork after examining the common contact principles of oriental dance therapy according to two academic characteristics of oriental medicine and dance therapy. Also, by grasping the theoretical basis of the theory of 「Donguibogam」Essence(精) Qi(氣) Spirit(神) from the perspective of oriental medicine, the oriental medicine dance therapy program that applied dance movements based on the ideas of oriental medicine and the basic concept and academic characteristics of the theory of 「Donguibogam」Essence(精) Qi(氣) Spirit(神) were used to derive the two correlations. Therefore, this study aims to establish a theoretical framework for the therapeutic possibility of oriental dance therapy program for improving individual health and quality of life. Summarizing the results of this study, 「Donguibogam」Essence(精) Qi(氣) Spirit(神) theory became an important predictive factor that ultimately affects individual health promotion and quality of life improvement in performing oriental medicine dance therapy program. Accordingly, oriental dance therapy programs can be used to develop movement programs for individual constitution and clinical symptoms of each disease, as well as for health promotion.
디스플레이 패널에 적용 가능한 offset average 방식과 auto-zero 방식을 혼합한 새로운 옵셋 저감 회로에 관한 연구
김한슬(Hanseul Kim),손상희(Sang-Hee Son),정원섭(Won-Sup Chung) 한국정보기술학회 2014 한국정보기술학회논문지 Vol.12 No.2
Offset voltage reducing circuit is newly proposed in this paper to make up for the weakness of auto-zero and offset averaging method. Proposed circuit has the mixing structure of auto zero and offset averaging method and it is designed to compensate for the weak points of above two methods by using capacitors and switches, at the same time. Computer simulations are executed to prove the operations of proposed circuit by using TSMC 1.8V, 0.18um CMOS process parameters and Cadence Spectre simulator. From the simulation results. it is verified that proposed circuit makes the offset voltage of 30mV in op-amp. to reduce under 1mV. So proposed offset cancellation circuit is used in buffer of LCD display panel, it reduces the offset voltage comparing to the previous method, effectively.
듀얼 커패시터를 이용한 새로운 연산증폭기 옵셋 저감 회로에 관한 연구
김한슬(Hanseul Kim),손상희(Sang-Hee Son) 한국정보기술학회 2013 한국정보기술학회논문지 Vol.11 No.5
In this paper, circuit of reducing the offset voltage in operational amplifier, effectively in high frequency range, is newly proposed to make up for the weak points of previous auto-zeroing method. Proposed offset cancellation circuit is constructed by using dual capacitor structure, which is added a capacitor and few switches to previous auto-zeroing structure. It is simple and can be easily realized and generate the stable output waveform. Circuit simulations are executed with HSPICE by using the TSMC 1.8V, 0.18㎛ CMOS process. From the simulation results. it is verified that applying the proposed method to operational amplifier with offset voltage of 30mV at 1GHz, magnitude of offset voltage is decreased to 1mV. So, it is confirmed that proposed circuit is good for compensation of offset voltage better than previous auto-zeroing offset cancellation method.
완벽주의 성향이 대학생의 강점인식 및 자기계발 유형에 미치는 영향
김동건(Donggeon Kim),김한슬(Hanseul Kim),김규태(Gyutae Kim),박은정(Eunjeong Park),채민호(Minho Chae),허창구(Changgoo Heo) 경북대학교 사회과학기초자료연구소 2021 연구방법논총 Vol.6 No.1
본 연구는 대학생의 자기계발 유형과 기질적 및 인지적 선행요인의 영향관계를 확인하기 위해 다차원 완벽주의와 강점인식이 자기계발 유형(향상적, 예방적, 강박적)에 미치는 직접효과와 간접효과를 살펴보았다. 주요 연구결과는 첫째, 자기 지향 완벽주의는 강점인식 수준을 높이지만 사회부과 완벽주의는 강점인식 수준을 낮추었고, 자기지향 완벽주의에 비해 사회부과 완벽주의의 영향이 더 강한 것으로 나타났다. 둘째, 자기지향 완벽주의는 모든 자기계발 유형의 수준을 높였으나 사회부과 완벽주의는 강박적 자기계발 수준만을 높이는 것으로 나타났다. 셋째, 강점인식은 향상적 및 예방적 자기계발 수준을 높였지만, 강박적 자기계발과는 관련성을 보이지 않았다. 넷째, 강점인식은 다차원 완벽주의가 향상적 및 예방적 자기계발에 미치는 영향을 매개하는 것으로 나타났다. 결론적으로 향상적 및 예방적 자기계발은 강점인식에 기반한 적응적 자기계발로 볼 수 있으며, 강박적 자기계발은 사회부과 완벽주의가 발생시킨 불안에 기초한 부적응적 자기계발로 볼 수 있었다. 본 연구의 주요 제한점은 연구모형에 정서적 요인을 포함시키지 않아 사회부과 완벽주의가 자기계발 유형에 미칠 수 있는 간접효과를 확인하지 못했다는 점이다. 본 연구 결과를 바탕으로 진로 및 취업을 위해 자기계발에 노력을 기울이고 있는 대학생들에게 인지적 개입 뿐 아니라 정서적 개입을 제공함으로써 적응적 자기계발을 유도할 필요성을 제안하였다. The purpose of this study is to identify the influence of their temperamental factors and cognitive factors on university students" self-development efforts. For this purpose, the direct and indirect effects of multidimensional perfectionism and strength knowledge on various types of self-development (promotive, preventive, obsessive) were examined. The main results of the study are as follows: First, self-oriented perfectionism increased strength knowledge, while socially-prescribed perfectionism lowered strength knowledge. Second, self-oriented perfectionism increased all types of self-development, but socially-prescribed perfectionism increased obsessive self-development. Third, strength knowledge increased promotive and preventive self-development, but it did not show any relationship with obsessive self-development. Fourth, the strength knowledge mediated the effect of multidimensional perfectionism on promotive and preventive self-development. In conclusion, promotive and preventive self-development based on strength knowledge can be seen as adaptive self-development, and obsessive self-development based on anxiety caused by socially-prescribed perfectionism can be seen as maladaptive self-development. The main limitation of this study is that it did not include emotional factors along with temperamental factors and cognitive factors, so it does not confirm the indirect effect of socially prescribed perfectionism on self-development type.
임광희(Kwanghee Im),김승기(Seungki Kim),김태훈(Taehun Kim),김한슬(Hanseul Kim),David K. Hsu,박제웅(Jewoong Park),양인영(Inyoung Yang) 한국자동차공학회 2008 한국자동차공학회 지부 학술대회 논문집 Vol.2008 No.11
It is very important to detect fiber orientation error in composite laminates because the layup of a CFRP composite laminates affects the properties of the laminate, including stiffness, strength and thermal behavior. An NDE technique for stacking orientation determination would be very beneficial because of layup orientation influence to the laminate stiffness. Usually, it is found that ultrasonic shear wave is pretty sensitive to fiber direction of CFRP composite laminates. An investigation of shear wave ultrasonic technique was carried out in order to detect stacking orientation error for quasi-isotropy composite laminates. Also, a jig is developed for generating a shear wave. A pyramid with an isosceles triangle with two 45° was made of aluminum to generate shear waves using two longitudinal transducers based on ultrasonic-polarized mechanism. Also, the signal splitter was connected to the pulser jack on the pulser/receiver and to the longitudinal transducers. An investigation of shear wave ultrasonic technique was carried out in order to generating shear wave.