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강성현(Seong-Hyeon Kang),김태형(Tae-Hyung Kim) 한국지반신소재학회 2014 한국토목섬유학회 학술발표회 Vol.2014 No.11
Settlement prediction has been conducted using Hyperbolic, Hoshino, and Monden methods, etc in the fields. These methods are only able to predict settlement after finishing the final filling stage. A new method is proposed to make up for such a weak point. This method was named as Kang"s method, which can be able to predict the settlement both the final filling stage and the staged filling from the initial filling stage in soft ground. To verify the applicability of this method, the measured settlement curve history was compared with the predicted one. The predicted settlement is well matched with the measured one. From the study, the Kang"s method can be possible to predict settlement during the staged filling with only the initial settlement data.
도재전장관용 비귀금속합금과 도재의 융착결합에 관한 연구
강성현,Kang, Sung-Hyun 대한치과보철학회 1980 대한치과보철학회지 Vol.18 No.1
The adhesive mechanisms on the metal-ceramic restorations have been reported to be mechanical interlocking, chemical bonding, compressive force, and Van der Waal's force, etc. Of these, the mechanical interlocking and chemical bonding forces are thought to affect the adhesive force between Ni-Cr alloy and porcelain. This study investigates the adhesion of Ni-Cr alloy to porcelain according to surface treatment. For this purpose, the following experiments were made; The compositions of Ni-Cr alloy as cast by emission spectrograph, and the oxides produced on Ni-Cr alloy during degassing at $1850^{\circ}F$ for 30 minutes in air and in vacuum were analyzed by X-ray diffractograph. The metal phases of Ni-Cr alloy were observed according to porcelain-baking cyclic heat treatment by photo microscope and the distribution and the shift of elements of Ni-Cr alloy and porcelain and the failure phases between Ni-Cr alloy and porcelain by scanning electron microscope. The adhesive force between Ni-Cr alloy and porcelain was measured according to surface treatment with oxidization and roughening by Instron Universal Testing Machine. Results were as follows; 1. The metal phases of Ni-Cr alloy as cast and degassing state showed the enlarged and fused core, but when subjected to porcelain-baking cyclic heat treatment, showed a dendrite growing. 2. The kinds of metal oxides produced on Ni-Cr alloy during degassing were found to be NiO and $Cr_2O_3$. 3. The distribution of elements at the interface of Ni-Cr alloy and porcelain in degassing state showed demarcation line, but in roughening state, showed mechanical interlocking phase. 4. The shift of elements at the interface occurred in both states, but the shift amount was found to be larger in roughening than in degassing. 5. The adhesive force between Ni-Cr alloy and porcelain was found to be $3.45{\pm}0.93kg/mm^2$, in degassing and $3.82{\pm}0.99kg/mm^2$, in roughening. 6. The failure phase between Ni-Cr alloy and porcelain showed the mixed type failure.
상악중절치(上顎中切齒)와 절치유두(切齒乳頭)와의 위치적(位置的) 관계(關係)
강성현,Kang, Sung-Huyn 대한치과보철학회 1976 대한치과보철학회지 Vol.14 No.1
The author has performed a statistical study on the vertical and horizontal distance between maxillary central incisors and incisive papilla, the maxillary intercanine width, and the form of maxillary dental arch. Stone models of maxillary dental arch were made in 403 Korean adults (300 male, 103 female) from 20 to 30. years of age. The results were as follows; 1. The vertical distance between maxillary central incisors and incisive papilla was 6.0mm.. 2. The horizontal distance between maxillary central incisors and incisive papilla was 9.0mm.. 3. The maxillary intercanine width was 37.7mm.. 4. The U type of maxillary dental arch was the greatest percentage with 68.2 %, the percentage for O type was about 21.4% and the V type 10.4%.
영양각탕(羚羊角湯)이 뇌혈류량(腦血流量)에 미치는 영향(影響)
강성현,윤용갑,Kang Sung-Hyun,Yun Young-Gab 대한한의학방제학회 2002 大韓韓醫學方劑學會誌 Vol.10 No.1
Yongyanggaktang has been used in oriental medicine as a therapeutic agent for cerebral disease and eclampsia for many years. The purpose of this study was to determine the effect of Yongyanggaktang and its exception of Cornu Saigae Tataricae(羚羊角) in YYG about regional cerebral blood flow(rCBF) in rats. 1. rCBF was increased by Yongyanggaktang in dose dependently. 2. rCBF was increased by exception of Cornu Saigae Tataricae(羚羊角) in YYG at high dosages. 3. rCBF was decreased by Yongyanggaktang pretreated propranolol. 4. L-NNA did not affect rCBF. 5.ODQ did not affect rCBF. Above the results. Yongyanggaktang relates to the symphathetic action.
복부 CT 영상의 화질 개선을 위한 total variation 기반의 노이즈 제거 알고리즘 최적화
강성현(Seong-Hyeon Kang),박민지(Minji Park),이도화(Do Hwa Lee),최혜란(Hye Ran Choi),이영진(Youngjin Lee) 대한전자공학회 2021 대한전자공학회 학술대회 Vol.2021 No.6
본 연구에서는 복부 CT 영상의 화질을 개선하기 위해 total variation (TV) 기반의 노이즈 제거 알고리즘을 최적화하고자 하였다. 이를 위해 인체의 뼈와 조직을 모사할 수 있는 Female Adult meSH (FASH) 팬텀을 이용하여 Gaussian noise가 모델링 된 시뮬레이션기반의 복부 CT 영상을 획득하였다. 또한, TV 기반의 노이즈 제거 알고리즘을 모델링한 후 다양한 평활화 인자를 설정하여 획득한 복부 CT 영상에 적용한 후에 대한 화질 평가를 위해 coefficient of variation (COV) 및 contrast to noise ratio (CNR)을 평가하였다. 결과적으로 COV 및 CNR 모두 0.01부터 0.21의 평활화 인자를 설정하였을 때 급격한 개선도를 보였으며 0.21 이후의 평활화 인자에서는 거의 일정한 값을 유지하였다. 결론적으로, 복부 CT 영상으로부터 TV 기반의 노이즈 제거 알고리즘을 적용할 때 최적화된 평활화 인자를 적용하는 것이 중요함을 증명하였다.
항암치료제로서의 면역관문 억제제에 관한 최근 연구 동향
강성현 ( Sung-hyun Kang ),박용빈 ( Yong-bin Park ),신희종 ( Hee-jong Shin ) 서울대학교 인구의학연구소 2015 人口醫學硏究論集 Vol.28 No.-
Immune checkpoint receptors are crucial molecules for adjusting immune responses. Checkpoint signaling dampens T cell activation to avoid autoimmunity and the destructive effects of an excessive inflammatory response. It is well established that tumors use several mechanisms to avoid elimination by the immune system. Checkpoint blockade therapy utilizes monoclonal antibodies to release the brakes from suppressed T cells, allowing them to be activated and recover their antitumor activity. This therapeutic approach has revolutionized cancer immunotherapy, and extraordinary increases in overall survival were noted, first with anti-CTLA-4 (cytotoxic T lymphocyte associated protein-4) and subsequently with anti-PD-l (programmed cell death receptor-I) in melanoma and other malignancies. The complex biology of immune checkpoint pathways still contains many mysteries, and the full activity spectrum of checkpoint blocking drugs is currently the subject of intense study. In this review, we discuss the discovery of immune checkpoints, the clinical application of their inhibitors and the future directions of this highly interesting class of molecules.
강성현(Kang, Sung-Hyun) 역사비평사 2015 역사비평 Vol.- No.113
The “9.23 Anti-Communist mass meeting” was held immediately after the Law on Punishment of Anti-National Activities had been enacted. But this meeting ended up with a failure of a national attempt on Pro-Japanese Punishment blaming the opponents for being communists (Red-Enemy) or Anti-Communist Propaganda. Jong-Hyoung Lee who once had been devoted into the independence movement but then became a Japanese-apologist, reporting independent activists to the authority so led them to be arrested and executed. After liberation, he fought in the front line against Pro-Japanese Punishment Act movement using both pen (newspaper) and gun (assassination).
강성현(Kang, Sung-hyun) 역사비평사 2014 역사비평 Vol.- No.109
This study analyses and evaluates issues relating to the “reconstruction of truth” of the Sewol Ferry disaster and past events, and suggests solutions to find the basic logic and method for the “reconstruction of truth” of the disaster. This study also defines the meaning of “reconstruction of truth” based on a review of the history of past settlements and models in Korea. From this review an evaluation of issues pertinent to a “reconstruction of truth” of the Sewol Ferry disaster is made that suggests limitations and tasks that need to be done with respect to the existing special law relating to the event. The main issues reviewed are the organization, status and independency of the committee examining the disaster, participation and leadership of the victim"s advocacy, the authority of investigation, examination and prosecution, and the time of investigation.