DCM을 사용하는 MB-OFDM 시스템에서 채널 정보를 이용한 향상된 연판정 복조 기법

구본욱,강병수,송형규,Koo, Bon-Wook,Kang, Byung-Su,Song, Hyoung-Kyu 한국통신학회 2007 韓國通信學會論文誌 Vol.32 No.5A

MB-OFDM UWB 시스템은 고속의 전송률을 달성하기위해 16-QAM형태의 dual carrier modulation(DCM)방식을 이용한다. DCM의 기본 아이디어는 4개의 입력비트를 서로 다른 형태의 2개의 16-QAM을 이용해 변조하고 2개의 변조결과를 최대한 멀리 떨어져 있는 2개의 OFDM 부반송파에 나눠서 중복 전송함으로써 하나의 부반송파가 복구할 수 없는 페이딩을 겪게 되더라도 다른 하나의 부반송파에 실려온 정보를 이용하여 전송한 4비트를 복조할 수 있다는 것이다. 두 개의 부반송파가 모두 열악한 페이딩을 겪게 될 확률은 매우 작으므로 DCM을 이용함으로써 성능향상을 기대할 수 있다. 기본적인 ML검출방식을 이용하여 신호를 복호할 경우 채널정보를 이용하지 않기 때문에 DCM의 본래 목적이라고 할 수 있는 다이버시티의 손실(loss in diversity)을 줄이자는 생각과 부합되지 않는다. 본 논문에서는 채널 상태 정보라는 여분의 신뢰할 만한 정보를 이용함으로써 더 좋은 성능을 얻을 수 있는 향상된 연판정 복조기법을 제안한다. MB-OFDM (Multiband-orthogonal frequency division multiplexing) UWB (ultra wide band) system uses DCM (dual carrier modulation) scheme to achieve high-data rate transmission. The basic idea of DCM is that to transmit the 4 bits more reliably two 16-QAM (quadrature amplitude modulation) symbols are used and the two 16-QAM sysmbols are allocated to each subcarrier of OFDM with maximum-distance. In the case of using the DCM, if one 16-QAM symbol is broken by deep fadding channel, a receiver can detect the transmitted signal by using another 16-QAM symbol. In the conventional ML(maximum likelihood) decision scheme, since the receiver does not use the CSI (channel state information), loss in diversity can not be reduced. In this paper, we propose improved soft-decision scheme with CSI for higher performance of MB-OFDM UWB systemn.

이태리 포플러의 화학적 전처리 공정을 통한 효소가수분해 영향 인자 분석

구본욱 ( Bon Wook Koo ),박나현 ( Na Hyun Park ),여환명 ( Hwan Myeong Yeo ),김훈 ( Hoon Kim ),최인규 ( In Gyu Choi ) 한국목재공학회 2009 목재공학 Vol.37 No.3

초임계수를 이용한 표고버섯 골목의 가수분해

구본욱 ( Bon Wook Koo ),이재원 ( Jae Won Lee ),최준원 ( Joon Weon Choi ),최돈하 ( Don Ha Choi ),최인규 ( In Gyu Choi ) 한국목재공학회 2006 목재공학 Vol.34 No.6

두문동(杜門洞) 칠십이현(七十二賢)과 송은(松隱) 구홍(具鴻)의 절의정신(節義精神)

구본욱 ( Bon Wook Koo ) 경북대학교 퇴계학연구소 2005 퇴계학과 유교문화 Vol.37 No.-

표고버섯 골목의 사용연수에 따른 화학적, 물리적 성상 및 폭쇄처리 후 변화 관찰

구본욱 ( Bon Wook Koo ),박준영 ( Jun Yeong Park ),이수민 ( Soo Min Lee ),최돈하 ( Don Ha Choi ),최인규 ( In Gyu Choi ) 한국목재공학회 2005 목재공학 Vol.33 No.1

카페인 커피 섭취 기간이 무산소성 운동능력과 혈중 피로물질에 미치는 영향

구본욱(Koo, Bon-Wook),신재숙(Shin, Jae-Suk),송창훈(Song, Chang-Hun),허유섭(Huh, Yu-Sub) 한국체육과학회 2015 한국체육과학회지 Vol.24 No.4

In this study, a test on the anaerobic exercise capacity and the change measurement on the blood fatigue substance are conducted to find influences from the caffeine coffee intake period to the anaerobic exercise capacity and the blood fatigue substance by classifying 32 subjects into the control group and the one day, the three days and seven days intake groups. One-way ANOVA is employed for the data analysis to examine the differences according to the caffeine intake period among the groups in the anaerobic power test while Two-way repeated measures ANOVA is used to analyze the differences of variables in the blood fatigue substances, ammonia, lactic acid and inorganic-phosphorus. The acquired conclusions are as followings. 1. No significant difference is found on PP, AP, MP, PD, MSR and DP in the anaerobic power test among the groups according to the caffeine intake period(p〉.05). 2. Although no difference is found in ammonia, lactic acid and inorganic-phosphorus among the groups(p〉.05).

고령지역 국채보상운동의 전개과정에 관한 고찰- 홍와 이두훈 가(家)의 고문서를 중심으로 -

구본욱 ( Koo Bon-wook ),이경규 ( Lee Keong-gwoo ) 대구가톨릭대학교 인문과학연구소 2017 인문과학연구 Vol.0 No.31

This thesis deals with how the National Debt Redemption Movement, which had originally gotten started in Daegu, spread to and developed in the Goryeong area, how the donation for the cause materialized and how the donated fund found its way for the redemption. Up to the present time, most of the studies concerning the movement have been conducted around secondary sources such as newspapers clips published at the time of the movement. Then came a turning point in 2013 in the study when primary sources were unearthed in the Yi Doo-hoon`s household. What were found there were not only original official documents exchanged between Daegu, the then head place of the movement, and Goryeong but also those sent to the United National Debt Assembly in Seoul. Their excavations brought about calls requesting a transfer in the way of the studies from around secondary sources to around primary ones which are, of course, original texts. Capitalizing on these original texts, this thesis focuses on the national debt redemption movement in the Goryeong area. Since the texts were written nearly a century ago, there are quite a number of differences in the linguistic usages between now and then. In that context, this thesis has translated and contemplated the original texts with the texts marked in the footnotes. It is ture that this thesis limits its study sphere to the Goryeong area, but a further application of this case is sure to provide a clue to finding out how such movements spread out to other areas and eventually to the nation.

Effects of Tianeptine on The Activity of Glutamate Transporter EAAT3 Expressed in Xenopus Oocytes

Bon-Wook Koo(구본욱),Hyo-Seok Na(나효석),Jung-Hee Ryu(유정희),Jung-Seok Choi(최정석),Sang-Hwan Do(도상환),Zhiyi Zuo(주오지이) 대한생물치료정신의학회 2020 생물치료정신의학 Vol.26 No.3

배경:티아넵틴(tianeptine)은 최근 주목받고 있는 항우울제로 기존의 모노아민 항우울제(monoaminergic antidepressants)와 달리 케타민(ketamine)과 같이 글루타메이트(glutamate)의 신경전달에 영향을 미치는 것으로 알려져 있다. 글루탐산염 전달체, 특히 흥분성 아미노산 전달체 3형(Excitatory Amino Acid Transporter 3, EAAT3)에 대한 연구가 계속되어 왔지만 티아넵틴이 EAAT3에 미치는 영향에 대한 연구는 부족하다. 방법:개구리(Xenopus laevies) 난모세포에 EAAT3의 mRNA를 세포질내 주입하여 발현시킨 후, 2개의 전극을 이용한 전압클램프를 사용하여 L-glutamate 투여 전, 중, 후로 막전위를 측정하였다. 반응값은 막전위의 변화를 적분하여 구하였으며, microcoulomb 단위로 제시하였다. 데이터는 평균 ± 표준오차로 표기하였다. 결과:티아넵틴은 EAAT3의 활성도를 농도의존적으로(0.1~100μM) 감소시켰으며 1mM 티아넵틴을 72시간 동안 노출 시켰을 때 Km(27.0±7.6 vs. 23.3±4.9mM, n=84, p=0.72)의 변화없이 Vmax(6.9±0.6 vs. 4.8±0.3mC, n=84, p<0.05)를 유의미하게 줄였다. 결론:개구리 난모세포에 티아넵틴을 72시간 동안 노출시켰을 때 농도의존적으로(1~100mM) EAAT3의 활성도를 감소시켰다. 이번 연구의 결과는 티아넵틴이 EAAT3의 이용 가능한 수나 회전률을 감소시킴으로써 활성도를 감소시키는 것을 시사한다. Objectives : Tianeptine is an antidepressant that has drawn attention recently. Unlike traditional monoaminergic antidepressants, tianeptine is known to affect glutamate neurotransmission like ketamine. However, there has been paucity of studies investigating the role of tianeptine on glutamate transporters, especially excitatory amino acid transporter type 3 (EAAT3). Methods : After expression of EAAT3 by intracellular injection of EAAT3 mRNA, we investigated the effect of tianeptine on the activity of EAAT3, by measuring membrane current in response to L-glutamate administration using Xenopus oocyte expression system and two-electrode voltage clamps. Results : Tianeptine (1mM for 72h) significantly reduced Vmax (6.9±0.6 vs. 4.8±0.3mC, n=14-22, p<0.05) without changing Km (27.0±7.6 vs. 23.3±4.9mM, n=14-22, p=0.72). Conclusion : When tianeptine was exposed for 72h, it decreased the activity of EAAT3 in a concentration-dependent manner (1-100mM). Our results suggest that tianeptine decreases EAAT3 activity by reducing the available number or turnover rate of EAAT3.

증례보고 : 복부구획 증후군 환자의 마취 경험

구본욱 ( Bon Wook Koo ),김상태 ( Sang Tae Kim ) 대한마취과학회 2007 Korean Journal of Anesthesiology Vol.52 No.1

Abdominal compartment syndrome (ACS) is a life-threatening emergency requiring prompt treatment. In these cases, a patient cannot ventilate effectively and oliguria can occur because of the high intra-abdominal pressure (IAP). The mortality rate is very high. Treatment is abdominal decompression and secondary closure. There are very few reports of the anesthetic management of a patient with ACS. We report a 38-year-old male patient who was diagnosed with ACS at the operating room. The IAP was measured and emergency abdominal decompression and "Bogota bag" apply were performed. The respiratory and hemodynamic parameters improved after this treatment. (Korean J Anesthesiol 2007; 52: 111~4)

논문(論文) : 계동(溪東) 전경창(全慶昌)의 연보작성(年譜作成)을 위한 시론(試論)

구본욱 ( Bon Wook Koo ) 대구사학회 2012 대구사학 Vol.107 No.-

Gyedong Jeon Kyung-chang(溪東 全慶昌) was a Confucian scholar who was born in Daegu in the mid-Chosun Dynasty. At the age of 24, he passed jinsasi(進士試), the first state examination for office. When he was 42, he passed gwageo(科擧), the highest-level state examination for civil service. After various government posts, he finally reached the position of jipyong(持平) in the Ministry of Saheonbu(司憲府). As a disciple of Toegye Yi Hwang(退溪 李滉), he became the first one to initiate Toegye Studies(退溪學) throughout the Daegu area. He didn`t live long enough, though. At the age of 54, he passed away in Seoul away from home. Later on, when the Japanese Invasion of Korea(壬辰倭亂) broke out in 1592, most of his posthumous works were lost, leaving behind, in his collection of works, just one prose(賦), five verses(詩), three letters of appeal to the king(疏) and two miscellaneous articles(雜著). Actually, it was from various writings of his colleagues that considerable data on him could be acquired. On the basis of such data, a chronology could be completed within this thesis so that it could help with further researches on his life, his learning, his lectures, his life as a civil servant and his influences on younger students. The thesis divides his life into four phases and looks into his teacher-pupil relationships which cover from his teacher Toegye(退溪) to such Confucian scholars as Son Choe-null(孫處訥), Yi Joo(李輳), Seo Sa-won(徐思遠), Kwak Jae-gyum(郭再謙), Ryu Yo-shin(柳堯臣) and Jung Kwang-chon(鄭光天). His literary colleagues pursued studies at such lecture halls as Yeongyeong Seowon School(硏經書院), Sonsajae School(仙査齋) and Youngmodang School(永慕堂), elevating Confucianism in the Daegu area to a distinguished academic order. Jeon Kyung-chang provided a foundation for the Daegu Confucianism to open a dawn of the Renaissance. The chronology in the thesis is mainly on Jeon Kyung-chang. However, it, at the same time, deals with his contemporary colleagues who were with him in the quest for academic scholarship, therefore providing knowledge on the flow and development of the Daegu Confucianism. Also included in the chronology are articles written by his older brother, his nephews and his daughters` descendants, since his academic scholarly works were succeeded by them along with his literary colleagues. The chronology encompasses not only his 54 years of life but also the following 424 years after his death in an effort to organize those items involving him even after his passing. The fact that Confucianism in and around Daegu is still under his influence is another reason for the chronology to extend into his after-death periods. At the end of the thesis is a list of eulogies, both verses and proses, offered by the officials and friends in his memory after his death. The list of literary works referred in the making of the chronology is also available at the end of the thesis.