Sammon 매핑을 사용한 모션 데이터의 대화식 표정 애니메이션

김성호,Kim, Sung-Ho 한국정보처리학회 2004 정보처리학회논문지 A Vol.11 No.2

본 논문은 다량의 고차원 얼굴 표정 모션 데이터를 2차원 공간에 분포시키고, 애니메이터가 이 공간을 항해하면서 원하는 표정들을 실시간 적으로 선택함으로써 얼굴 표정 애니메이션을 생성하는 방법을 기술한다. 본 논문에서는 약 2400여개의 얼굴 표정 프레임을 이용하여 표정공간을 구성하였다. 표정공간의 생성은 임의의 두 표정간의 최단거리의 결정으로 귀결된다. 표정공간은 다양체 공간으로서 이 공간내의 두 점간의 거리는 다음과 같이 근사적으로 표현한다. 임의의 마커간의 거리를 표시하는 거리행렬을 사용하여 각 표정의 상태를 표현하는 표정상태벡터를 정의한 후, 두 표정이 인접해 있으면, 이를 두 표정 간 최단거리(다양체 거리)에 대한 근사치로 간주한다. 그리하여 인접 표정들 간의 인접거리가 결정되면, 이틀 인접거리들을 연결하여 임의의 두 표정 상태간의 최단거리를 구하는데, 이를 위해 Floyd 알고리즘을 이용한다. 다차원 공간인 표정공간을 가시화하기 위해서는 Sammon 매핑을 이용하여 2차원 평면에 투영시켰다. 얼굴 애니메이션은 사용자 인터페이스를 사용하여 애니메이터들이 2차원 공간을 항해하면서 실시간으로 생성한다. This paper describes method to distribute much high-dimensional facial expression motion data to 2 dimensional space, and method to create facial expression animation by select expressions that want by realtime as animator navigates this space. In this paper composed expression space using about 2400 facial expression frames. The creation of facial space is ended by decision of shortest distance between any two expressions. The expression space as manifold space expresses approximately distance between two points as following. After define expression state vector that express state of each expression using distance matrix which represent distance between any markers, if two expression adjoin, regard this as approximate about shortest distance between two expressions. So, if adjacency distance is decided between adjacency expressions, connect these adjacency distances and yield shortest distance between any two expression states, use Floyd algorithm for this. To materialize expression space that is high-dimensional space, project on 2 dimensions using Sammon's Mapping. Facial animation create by realtime with animators navigating 2 dimensional space using user interface.

지역사회에서 소화불량 환자의 Helicobacter pylori 감염에 대한 집단검진 및 치료효과

김성호,홍대용,이경수,김석범,김상규,서정일,김미경,강복수,Kim, Seong-Ho,Hong, Dae-Yong,Lee, Kyeong-Soo,Kim, Seok-Beom,Kim, Sang-Kyu,Suh, Jeong-Ill,Kim, Mee-Kyung,Kang, Pock-Soo 대한예방의학회 2000 Journal of Preventive Medicine and Public Health Vol.33 No.3

본 연구는 지역사회에서의 소화불량환자의 Helicobacter pylori 양성률, 치료순응률 및 관련요인을 분석하고, 1년 후 요소호기검사로 추적검사를 실시하여 Helicobacter pylori 박멸률 및 관련 요인, Helicobacter pylori 박멸과 증상 호전과의 관계 등을 분석하고, Helicobacter pylori 치료 대안별 비용을 추정하고자 시행되었다. 경주시에 거주하는 30세 이상의 성인을 대상으로 1998년 3월 510명의 소화불량 증상 보유자를 선정하여 혈청검사 (ELISA)를 실시하였다. 대상자 510명 중 혈청검사 양성자 375명(73.5%)중 내시경검사에 동의한 304명에 대하여 CLO검사를 실시하였고, CLO검사 양성자 204명 에 게 tripotassium dicitrato bismuthate, amoxicillin, metronidazole의 3제요법을 실시하였다. 연구결과를 요약하면 다음과 같다. 소화불량자 510명 중 혈청검사에 의한 양성률은 73.5%였고, 혈청학적 검사 양성자 375명 중 내시경검사 수진율은 304명으로 81.1%였다. 이 중 CLO검사 양성자는 204명으로 67.1%였다. Helicobacter pylori 박멸여부를 판정하기 위한 1년 후 추적검사 완료자는 181명으로 88.7%였으며, 이 중 투약순응자는 122명으로 추적완료자의 67.4%였다. 추적완료자 중요소호기검사상 박멸된 대상자는 87명으로 박멸률은 48.1%였다. 투약순응자의 경우 122명 중 70명이 박멸되어 박멸률은 57.4%였다. CLO 양성여부와 대상자의 특성과의 관련성을 분석한 결과 연령, 성별, 주관적 경제적 수준, 흡연, 음주, 비타민 C 복용여부, 규칙적 식사 여부와 관련성이 없었다. 소화불량 증상 중 '상복부 통증' 이외의 모든 증상과 CLO양성 여부와는 유의한 관련성이 있었다(p<0.05). 추적검사 완료자에서 연령과 음주여부는 투약순응률과 유의한 관련성이 있었으나(p<0.05),성별, 흡연여부, 비타민 C 복용여부, 규칙적 식사 여부와는 관련성이 없었다. 치료순응여부와 Helicobacter pylori 박멱률간에는 통계적으로 유의한 관련성이 있었으나(p<0.01), 그외 대상자들의 특성과 Helicobacter pylori 박멸률 간에는 관련성이 없었다. Helicobacter pylori가 박멸된 군과 박멸되지 않은 군의 증상 호전율은 각각 62.1%, 59.6%였으나 통계적으로 유의하지는 않았다. 대안별 비용을 분석하였는데, 대안 I은 소화불량환자 전원에게 3제요법을 시행한 후 요소호기검사를 시행하는 방법이고, 대안 II는 소화불량환자를 대상으로 혈청검사를 시행 후 양성자에게 3제요법을 시행하고 요소호기검사를 시행하는 방법이며, 본 연구에서 적용된 대안 III은 소화불량환자를 대상으로 혈청검사를 시행 후 양성자에게 내시경검사와 CLO검사를 실시하고, 양성자에게 3제요법을 시행한 후 요소호기검사를 시행하는 방법이다. Helicobacter pylori 박멸을 위한 대안별 비용을 분석하면, 1인당 치료 비용은 대안 I 이 61,761원, 대안 II는 51,549원, 대안 III은 58,328원이었다. 대안별 비용과 항생제 내성 문제, 투약대상자의 수 등의 장 단점을 고려할 때 비용면에서는 대안 II가, 투약대상자수, 항생제 내성 문제, 위암의 조기발견 가능성 등을 고려하면 대안 III이 좋은 대안이라 할 수 있다. 지역사회 소화불량환자에서 혈청학적 검사 양성자 중 CLO 양성자율이 67.1%로 높고, 3제요법에 의한 치료율은 48.1%(치료순응자의 치료율은 57.4%)이고, 증상호전율은 60%를 상회하므로, Helicobacter pylori의 높은 감염률을 고려하면 지역사회에서 소화불량환자를 대상으로 한 집단검진 및 박멸사업의 시행은 의의가 있을 것으로 생각된다. 그러나 투약 대상자 선정을 위한 선행 검사와 Objectives : To investigate the positive rate of Helicobacter pylori in patients with dyspepsia; medical compliance and related factors; the eradication rate a year after screening and related factors; the relationship between the eradication of Helicobacter pylori and the improvement of symptoms; and the estimated cost of three alternative approaches to treat Helicobacter pylori in the community. Methods : A total of 510 subjects with dyspeptic symptoms were selected and given the serological test in March 1998. The subjects were all adults over 30 years of age residing in Kyongju city. Results : Of the 510 selected subjects, 375 (73.5%) subjects proved positive for Helicobacter pylori on serological testing. Of these 304 (81.1%) who consented to an endoscopic examination, underwent a Campylobacter-like organism (CLO) test. Of these 304 subjects, 204 (67.1%), who had positive CLO test results, were given the triple therapy - tripotassium dicitrato bismuthate, amoxicillin, and metronidazole. To determine the eradication rate of Helicobacter pylori, 181 (88.1%) out of the 204 subjects who were given the triple therapy completed a follow-up urea breath test one year later. Of these, the Helicobacter pylori of 87(48.1%) subjects was eradicated. Among the 122 subjects who were medication compliant, the Helicobacter pylori eradication rate was 57.4% (70 subjects), while the eradication rates was only 28.8% (17subjects) in the non-compliant group. The Helicobacter pylori eradication was significantly related to compliance (p<0.01), but not to other characteristics and habits. The symptom improvement rate tended to be higher 62.1%), in the Helicobacter pylori eradicated group than in the non-eradicated group (59.6%). Conclusions : When the advantages and disadvantages of each alternative treatment were considered in the light of cost, antibiotic tolerance and the number of patients to be treated, alternative II was favorable in terms of cost. Alternative III was favorable in terms of the number of patients to be treated, antibiotic tolerance and early detection of gastric cancer. Further long-term research analyzing the cost-benefit and cost-effectiveness of each treatment will be needed as supporting material in creating new policies.

ICR 마우스에서 방사선 조사 용량에 따른 혈액변화의 관찰

김성호,이종환,김세라,이해준,이윤실,김태환,류시윤,조성기,안미영,Kim, Sung-Ho,Lee, Jong-Hwan,Kim, Se-Ra,Lee, Hae-June,Lee, Yun-Sil,Kim, Tae-Hwan,Ryu, Si-Yun,Jo, Sung-Kee,An, Mi-Yeong 대한수의학회 2002 大韓獸醫學會誌 Vol.42 No.2

The effects of ionizing radiation on the peripheral blood elements of ICR mouse were examined after varying doses of whole-body gamma-irradiation. ICR mice (n=50) were exposed to 0, 2, 4, 6 and 8 Gy gamma-ray ($^{60}Co$) at 10 Gy/min. The animals were studied for their hematological response on days, 3, 7, 14, 21, 42 and 56 post irradiation. No significant change was noted in erythrocyte, hemoglobin and hematocrit values after irradiation with dose of 2 Gy. Decreasing erythrocyte, hemglobin and hematocrit values occured after irradiation with doses of more than 4 Gy on day 7 after irradiation followed by a sharp fall on day 14. A recovery in these values was noted after 3 weeks of irradiation. Thrombocyte counts decreased on day 3, reaching minimal values on day 7. The total number of leukocytes was reduced on day 3, mainly because of a decrease in the lymphocyte population. An evident lymphopenia and neutropenia occur almost on the day 3 and last up to the day 28 after irradiation. All of the hematological values decreased in the blood in a dose-dependent manner at the same time.

심부 혈전 증의 외과적 혈전제거술

김성호,이상호,Kim, Seong-Ho,Lee, Sang-Ho 대한흉부심장혈관외과학회 1991 Journal of Chest Surgery (J Chest Surg) Vol.24 No.12

From July 1988 to January 1991 six patients, aged 29 to 70 years underwent transfemoral thrombectomy for the treatment of deep vein thrombosis. Preoperative venograms showed thrombi in the following locations: calf veins[five], superficial femoral or popliteal veins [four], common femoral veins[three], and iliac veins[three], Durations of symptoms before admission were from 1 day to 20days. Operations were performed under local anesthesia and all the patients were requested for doing Valsalva maneuver during thrombectomies. All patients were received heparin pre-and postoperatively, which was switched to Coumadin for preventing of rethrombosis. One patient was transferred to other hospital 4 months after operation due to regional reason, and the remained five patients were evaluated with a mean follow-up time of 20 months. There was no evidence of postoperative pulmonary embolism. Three of five patients were clinically asymptomatic. One complained of the heaviness of involved leg in the evening, and the other had discomfort on walking Even though our cases were a few in number, we concluded that thrombectomy is a valuable treatment modality of deep vein thrombosis.

AANN-기반 센서 고장 검출 기법의 방재시스템에의 적용

김성호,이영삼,Kim Sung-Ho,Lee Young-Sam 한국해양학회 2006 바다 Vol.11 No.2

비선형 주성분 분석은 기존에 널리 알려져 있는 주성분 분석기법과 유사한 다변수 데이터 분석을 위한 새로운 접근 방법이다. 비선형 주성분 분석은 AANN(Auto Associative Neural Network)으로 PCA와 마찬가지로 변수들 간에 존재하는 상관관계를 제거함으로써 고차의 다변수 데이터를 정보의 손실을 최소화하면서 최소 차원의 데이터로 변환하는 기법이다. AANN기반 센서 고장 검출 기법을 실제 방재시스템에 적용하여 봄으로써 센서 드리프트 등과 같은 센서 고장의 검출 및 유효한 센서 보정 성능을 확인하였다. NLPCA(Nonlinear Principal Component Analysis) is a novel technique for multivariate data analysis, similar to the well-known method of principal component analysis. NLPCA operates by a feedforward neural network called AANN(Auto Associative Neural Network) which performs the identity mapping. In this work, a sensor fault detection system based on NLPCA is presented. To verify its applicability, simulation study on the data supplied from risk management system is executed.

NED를 사용하는 FH-CSS(Frequency Hopped - Chirp Spread Spectrum)의 항 재밍 성능 분석

김성호,김영재,황석구,조병각,신관호,김남,Kim, Sung-Ho,Kim, Young-Jae,Hwang, Seok-Gu,Jo, Byoung-Gak,Shin, Kwan-Ho,Kim, Nam 한국군사과학기술학회 2011 한국군사과학기술학회지 Vol.14 No.1

In the defence wireless communications, conventional Anti-Jamming techniques(Frequency Hopping/Spread Spectrum or Direct Sequence/Spread Spectrum) are used to overcome a intentional interfering signals which are single/multitone or partial band jammer etc. DS/SS techniques is very strong on tone jamming signal but not to be on a partial band jammer. So FH/SS AJ performances are expected method of an substitution of DS/SS, however FH/SS could not have good performance on some BMTJ(Band Multi-tone Jammer). So this paper proposes FH-CSS (Frequency Hopped - Chirp Spread Spectrum) to get more robustness against jammers(BMTJ, PBNJ) and analyze the AJ performances.

Bacillus sp. K-1과 그의 변이주가 생산하는 Biopolymer의 물성에 관한 연구

김성호,임무현,정낙현,Kim, Sung-Ho,Yim, Moo-Hyun,Choung, Nack-Hyun 한국응용생명화학회 1996 Applied Biological Chemistry (Appl Biol Chem) Vol.44 No.1

볏짚으로부터 분리한 Bacillus sp. K-1과 그 변이주 KM-21과 KM-83이 생산하는 biopolymer들의 물성학적 성질을 비교 조사하였다. 은도에 따른 biopolymer의 겉보기 점도는 온도가 높아짐에 따라 감소하였으며, $20^{\circ}C$일 때에 비해 $80^{\circ}C$일 때 KM-21 균주가 생산하는 biopolymer는 1.7배, K-1균주의 biopolymer는 2.7배, KM-83 균주의 biopolymer는 1.9배 정도로 낮은 점성을 보였다. Biopolymer 용액의 점성은 농도가 증가함에 따라 크게 증가하여 6%의 농도에서 가장 높게 나타났으며, 2%, 4%, 6% 모두 pseudoplastic특성을 나타내어 농도에 대한 의존성이 매우 높았다. 6%의 농도일 때 2%의 농도와 비교해서 전단 속도가 $93\;sec^{-1}$ 일 때 KM-21은 26배, K-1은 56배, KM-83은 28배로 모균주의 biopolymer인 K-1이 가장 높은 점성을 보었다. pH에 따른 점도 변화는 pH7.0에서 최고를 보였으며, 알칼리성 조건일 때에 비해 산성조건에서 상대적으로 낮은 값의 점성을 보였다. The rheological properties of biopolymers produced by Bacillus sp. K-1 and its mutant strains(KM-21, KM-83) were studied. Apparent viscosity of biopolymers decreased as rising the temperature. The biopolymer produced by KM-21 strain showed 1.7 times low viscosity, 2.7 times low viscosity by K-1 and 1.9 times low viscosity by KM-83 at $80^{\circ}C$ compared with at $20^{\circ}C$ respectively. The viscosity of biopolymer solution also increased with increasing the polymer concentration and showed pseudoplastic characteristics which is high temperature dependency in all concentration. The change of the biopolymer viscosity on the pH showed the highest value at the pH 7.0 and it showed lower at acidic condition than at alkaline condition comparatively.

대표적 근류 생약의 방사선 방호효과

김성호,오헌,김세라,조성기,변명우,김길수,이종환,신동호,Kim, Sung-ho,Oh, Heon,Kim, Se-ra,Jo, Sung-kee,Byun, Myung-woo,Kim, Kil-soo,Lee, Jong-hwan,Shin, Dong-ho 대한수의학회 2001 大韓獸醫學會誌 Vol.41 No.1

We performed this study to determine the effect of Jiegeng(Platycodon grandiflorum), Danggui(Angelica sinensis), Gancao(Glycyrrhiza glabla), Chaihu(Bupleurum falcatnosa), Shoudehuang(Rehmannia glutinosa), Huangqi(Satragalus membranaceus), Muxiang(Saussurea lappa), Yuanzhi(Polygala tenuifolia), Rensen(Panax ginseng) and Baishaoyao(Paeonia lactiflolia), as Oriental radices herbs, on jejunal crypt survival, endogenous spleen colony formation and apoptosis in jejunal crypt cells of mice irradiated with high and low dose of ${\gamma}-radiation$. Jiegeng(p<0.005), Danggui(p<0.0005), Gancao(p<0.005), Chaihu(p<0.05), Muxiang(p<0.05), Rensen(p<0.005) and Baishaoyao(p<0.005) were effective in intestinal crypt survival. Danggui(p<0.05), Chaihu(p<0.05), Shoudehuang(p<0.05), Huangqi(p<0.05), Rensan(p<0.005) and Baishaoyao(p<0.05) increased the formation of endogenous spleen colony. The frequency of radiation induced apoptosis was also reduced by pretreatment with Chaihu(p<0.05), Muxiang(p<0.005), Yuanzhi(p<0.05), Rensan(p<0.05) and Baishaoyao(p<0.05). Although the mechanisms of this effect remain to be elucidated, these results indicated that Danggui, Chaihu, Muxiang, Rensan and Baishaiyao might be a useful radioprotector, especially since it is a relatively nontoxic natural product.

개발 화약의 내폭풍압 측정

김성호,김정국,이준웅,Kim Sung-ho,Kim Jeong-kook,Lee Jun-wung 한국군사과학기술학회 2004 한국군사과학기술학회지 Vol.7 No.3

Internal blast performance test on developed explosives was carried out. Internal blast means a blast wave in closed chambers like tunnels, bunkers, operation center and chamber of ships. We used Anpa tunnel for our test facility. We performed two series of tests to measure internal blast of developed explosives. Three different kinds of cast PBXs, DXD-09, DXD-10, DXD-18, and conventional explosive, Tritonal, were used in our test. The explosives were cast as a charge of 108mm diameter in a plastic tube of a 3mm thickness. The length of charges 4ere adjusted as a weight 3kg. A melt-cast explosive, tritonal, was used as a reference. Pentolite booster was used. The cylindrical boosters have a 95mm diameter and 47.5mm height. The results showed that there may be some differences between the performances in the air blast tests and those in the internal blast tests. The results showed that DXD-10, the best performance in air blast tests, showed the poorest performance in internal blast among the explosives tested. On the other hand, DXD-18 showed exactly the opposite trend. This is probably due to the highest contents of aluminum and inert binder in DXD-18. DXD-18 has $38\;wt\;\%$ of aluminum and $17\;wt\;\%$ of inert binders.

마우스 동계골수이식 후 면역체계의 재생: I. 말초혈액 및 림프장기 세포의 숫적 변 화와 림프구아군의 분포

김성호,오헌,이송은,김순태,조성기,현병화,류시윤,Kim, Sung-Ho,Oh, Heon,Lee, Song-Eun,Kim, Soon-Tae,Jo, Sung-Kee,Hyun, Byung-Hwa,Ryu, Si-Yun,Daynes, Raymond A. 한국수의병리학회 1997 한국수의병리학회지 Vol.1 No.1

The cellularity and composition of the spleen lymph node thymus and peripheral blood and tempo of regeneration were studied at various time points after syngeneic bone marrow transplantation(BMT) in C3H/Hen mice. Significant depression of absolute lymphocyte count was noted on week 1 after lethal whole-body irradiation and BMT. In comparison to the lymph node thymus and spleen had an rapid regeneration of cellularity. The distinct cell populations($CD4^+,\;CD8^+,\;CD28^+,\;B220^+) have determined in the lymphoid tissue of mice subjected to irradiation. The relative representation of these subpopulations was significantly different from that in nonirradiated control. $CD4^+\;and\;CD8^+$ cells were present in very low numbers whereas the $B220^+$ cells reached more than normal range at 2 weeks after BMT. The number of $CD4^+$ cells returned to normal relatively soon than $CD8^+$ cell. At week 4 after BMT, the cellularity and composition of spleen lymph node and peripheral blood lymphocyte reached about 50% of the normal range therefore we can choose this time point for the other tests of immune function after BMT.