저전력 10 Gbps CMOS 병렬-직렬 변화기

심재훈 ( Jae Hoon Shim ) 한국센서학회 2010 센서학회지 Vol.19 No.6

This paper presents a 10Gbps CMOS parallel-to-serial converter for transmission of sensor data. A low-noise clock multiplying unit(CMU) and a multiplexer with controllable data sequence are proposed. The transmitter was fabricated in 0.13 urn CMOS process and the measured total output jitter was less than 0.1 UIpp(unit-interval, peak-lo-peak) over 20 kHz to 80 MHz bandwidth. The jitter of the CMU output only was measured as 0.2 ps,rms. The transmitter dissipates less than 200 mW from 1.5 VI2.5 V power supplies.

商末 周初 山西省의 세력판도를 통해 본 晉國 봉건의 새로운 이해

沈載勳(Jae-hoon Shim) 동양사학회 1999 東洋史學硏究 Vol.66 No.-

大河口 霸伯墓 출토 西周 청동예악기 파격의 양면성

沈載勳(Jae-hoon Shim) 동양사학회 2013 東洋史學硏究 Vol.125 No.-

The recent excavations of the Peng ? cemetery at Hengshui 橫水, Jiang Prefecture 絳縣 and Ba ? cemetery at Dahekou 大河口, Yicheng Prefecture 翼城縣 in southwestern Shanxi provide valuable information on the development of regional polities there led by the state of Jin 晉 in the Western Zhou period. This study examines various issues on the excavations critically, especially pointing out that the previous scholarships on the nature of the two polities, Peng and Ba, toward Jin, the feudal state of Zhou in the region, have been obsessed with the dichtomy of “independence” or “subordination.” Instead, focusing on the unbalance and exception of the funerary practices in the two Dahekou tombs (M1 and M1017) of Ba rulers, this study suggests the ambivalence of the regional Ba and Peng polities. This ambivalence seems to have signified the process of the assimilation from the pro-Shang indigenous polities to the regional polities under the Zhou realm. Therefore, it is more evident to propose the role Jin, the feudal state of Zhou, played for overseeing the neighboring polities such as Ba and Peng in southwestern Shanxi.

柞伯鼎과 西周 후기 전쟁금문에 나타난 왕과 제후의 군사적 유대

심재훈(Jae-hoon Shim) 중국고중세사학회 2013 중국고중세사연구 Vol.29 No.-

Most scholars working on the Western Zhou consider its late period as the time of decline. As for the reason, they note the alienation between the royal house and feudal states caused by the weakening of the “Lineage Law” (zongfa 宗法) and “Fengjian” 封建 systems. However, the late Western Zhou warfare inscriptions such as the Zuobo ding clearly show that the royal house maintained strong military ties with feudal lords even in the late Western Zhou period. The general understanding of their estrangement followed by the royal decline seems to contradict with their strong military alliance documented in the late Western Zhou warfare inscriptions. This inconsistency cannot be understood well in the dichotomy between the royal house and the feudal lords which has been prevailed in the theoretical studies of the Western Zhou state. Rather, the new conceptual division between the "Zhou Polity" (Zhoubang 周邦) and the “Others” (Tabang 他邦) could be a new vista to explain the contradiction. The consciousness of the “Zhou Polity” increasingly shared by the royal house and the feudal states must have motivated their strong military ties against the “Others” even in the late Western Zhou when the authority of the king was already in decline.

민족주의적 동아시아 고대사 서술과 그 자료 새롭게 보기

沈載勳(Shim Jae-hoon) 역사학회 2010 역사학보 Vol.0 No.208

Comparing the development of the nationalistic historiography of Japan, China and Korea during the 20th century, this study finds a general trend in the respective development. The current Chinese drive to the height of the nationalistic historiography seems to correspond with that of Japan's during the 1930s-40s and Korea's during the 1980s-90s. Such an understanding may ease the suspicion many Koreans have had about the political intention under the Chinese history projects such as the "Northeast Project." The abundant paleographic materials recently discovered in China, especially the Warring States bamboo slips, have provided a new insight into the received texts at our disposal. Most transmitted texts seem to have been recreated or rewritten during the Han period. This is the reason why the philological studies both for the plaeographic and transmitted texts will be a new vista in understanding ancient East Asia. It would be desirable for Korean scholars to free from "the obsession to ours," considering early China and its sources as the cradle of the East Asian civilization.

농업부산물 바이오매스 자원의 부존특성 및 활용방안

심재훈 ( Shim Jae Hoon ),홍성구 ( Hong Seong Gu ) 한국농공학회 2004 한국농공학회 학술대회초록집 Vol.2004 No.-

농촌지역에서 발생되는 주요 농업부산물 바이오매스 가운데, 과수 전정가지와 밭작물 부산물을 중심으로 단위면적당 발생량, 함수비 및 발열량을 조사하였다. 단위면적당 발생량은 밭작물이 0.3kg/m²이상, 과수의 경우 최대 5.104kg/m²까지 나타났다. 과수의 경우 재배년수나 품종에 따라서 발생량이 크게 변화하는 것으로 파악되어 앞으로 장기적인 조사가 요구된다. 발열량 조사결과 조사된 모든 농업부산물이 4,000kcal/kg 이상을 가지고 있으며, 밭작물의 경우 함수비가 20% 미만으로 활용조건이 양호한 것으로 나타났다. 자동원소분석기에 의한 원소조성비는 탄소와 수소의 구성비율이 각각 45%, 6% 내외로 나타났다. 질소는 대부분 1% 미만이고 황은 검출한계 미만으로 나타났다. 대상 지역의 배, 포도, 고추, 깨 재배지를 GPS 측량을 통해서 얻은 자료를 GIS에 레이어로 구현하였다. 이 자료는 바이오매스 이용을 위한 시설의 위치선정과 수집 · 운송계획에 필요한 중요한 자료로 활용할 수 있을 것이며 시설입지 후 관리에도 용이하게 활용될 수 있다. 앞으로 꾸준히 좀 더 많은 지역을 조사하여 Database를 구축할 필요성이 요구된다. 대상지역의 겨울철 에너지 소비량이 93.5TOE이고 부산물 바이오매스 에너지는 107.437TOE 이므로 대상지역 55가구의 겨울철 난방을 대체 할 수 있다. 또한 조사대상 지역의 한 가구당 에너지 사용량을 대체할 수 있는 재배면적은 대상지역의 한 가구당 에너지 사용량이 1.7TOE 이므로 포도, 배, 고추, 깨의 재배면적은 0.36ha, 0.45ha, 1.20ha, 0.87ha로 계산된다. 대상지역을 좀더 확대하여 연구가 진행된다면 부산물 바이오매스의 대체에너지로써의 활용가능성이 더욱 커질 것으로 전망된다. 과수 부산물의 경우 재배년수와 품종등에 따라 부산물 발생량이 크게 달라지므로 이에 대한 추가의 조사가 요구된다. 본 조사연구에서 얻어진 결과는 앞으로 농촌지역에서 바이오매스자원의 활용계획을 수립하는데 효과적으로 발생되는 각종 부산물을 포함시킨다면 농촌지역에서의 바이오매스자원의 대체에너지 개발과 발전시설 도입에 효과적으로 이용될 수 있을 것으로 전망된다. Biomass resources for the agricultural region don’t manage and affect adversely to adaptable environment. Pertinent application is effectived not only development of substitute energy but also environmental preservation. In this study is presented to natural trait of agricultural biomass through gathering and analysis of unit energy production, elemental analysis and unit production.

하향식 가스화 장치를 이용한 바이오매스로부터의 합성가스 생산

심재훈 ( Shim Jae-hoon ),홍성구 ( Hong Seong-gu ) 한국농공학회 2005 한국농공학회 학술대회초록집 Vol.2005 No.-

Syngas or fuel gas production through biomass gasification is a century old technology. Biomass gasification is getting more and more interest recently as one of competitive renewable energy technologies. It does not contribute to increasing greenhouse gases(GHG). A down-draft gasifier was designed and tested for syngas quality using different fuel sets in this study. The gasifier was of about 100kW capacity. Tests were conducted at air flow rates ranging from 10 to 60㎥/hr. Fuels tested included wood chips and wood char. The results showd that gas quality in terms of flammability was reasonably good when the temperatures were over 600℃ inside the gasifier. Although 800℃ or higher is recommended, gas quality was reasonably good. If insulation was provided outside the gasifier, the temperature would increase. When wood chips were used, the temperature was below 600℃ and gas quality was not good. It seemed that calorific values of fuel and height of reduction zone in the gasifier are very important. The results of the tests would provide important information for designing more improved gasifier and its operation.

Alum 응집을 이용한 Scrubber 순환수의 불소제거

심재훈 ( Jae-hoon Shim ),김진수 ( Jin-su Kim ),이한슬 ( Han Seol Lee ),강민구 ( Min-koo Kang ),이상일 ( Sang-lll Lee ) 한국물환경학회(구 한국수질보전학회) 2015 한국물환경학회·대한상하수도학회 공동 춘계학술발표회 Vol.2015 No.-

평왕은 정말 어디로 갔을까? - 전통 역사지리학의 오인과 동천의 재구성 -

沈載勳(Jae-hoon Shim) 동양사학회 2021 東洋史學硏究 Vol.154 No.-

The Xinian in the second volume of the Tsinghua Bamboo Slips provides a different understanding of the so-called eastward relocation (dongqian) of the Zhou royal house than suggested in transmitted texts such as the Shiji and Zhushu jinian. Introducing the controversial issues concerning the relocation in the Xinian, this study focuses mostly on the problematic place name Shao E, where King Ping is said to have stayed for a while until Lord Wen of Jin brought him back to the capital region and enthroned him. In particular, while criticizing the later commentators’ identification of E with Xiangning, Shanxi, this study argues that Shao E in the Xinian should be more properly located in the Nanyang region. This relocation suggests that the year 770 BCE, inscribed for so long as the turning point between the Western Zhou and the Eastern Zhou periods, is problematic. It further proposes that the narrative on the eastward relocation in the Xinian does not necessarily contradict the transmitted texts, but rather tends to resolve some inconsistencies inherent in those texts.

계층적 픽셀 예측과 컨텍스트 적응적 산술 부호화를 이용한 이미지 적응 무손실 압축

심재훈(Shim, Jae Hoon),김세윤(Kim, Seyun),조남익(Cho, Nam Ik) 한국방송·미디어공학회 2022 한국방송공학회 학술발표대회 논문집 Vol.2022 No.6

본 논문에서는 계층적 픽셀 예측과 컨텍스트 적응적 산술 부호화를 이용한 이미지 적응 무손실 압축 알고리즘을 제안한다. 입력 RGB 이미지는 먼저 가역적 색상 변환이 적용된다. Y 채널 이미지는 기존의 무손실 압축 인코더로 압축되고, U와 V채널 이미지는 Y 채널 이미지를 기반으로 예측된다. 원본과의 차이는 컨텍스트 적응적 산술 부호화를 통해 압축된다. 본 논문에서 제안된 알고리즘에서는 입력 이미지의 성질에 따라 산술 부호화에 사용되는 인코더의 개수를 적응적으로 변화시킨다. 또한 저주파 성분에 상대적으로 많은 자원을 집중시킴으로써 압축 성능을 향상시켰다. 제안된 방법은 기존에 사용되던 압축 방식들과 비교했을 때에도 의미 있는 성능을 보였다.