Backpropagation 학습알고리즘을 이용한 형상검출

박경우,조정래,이기준 광주보건대학 1997 論文集 Vol.22 No.-

The Backpropagation learning method is composed of input layer, Middle layer, and Output layer as a Hierarchical Network. Because we can settle Weight of Middle layer using difference which is output value of Output layer and Error value, in proportion to the times of learning, we can obtain a good quality of output layer.

2급 와동 수복시 사용방법에 따른 복합 레진 인레이의 변연누출에 관한 실험적 연구

박경준,계기성,고영무,김경남 大韓齒科器材學會 1993 대한치과재료학회지 Vol.20 No.1

The purpose of this in vitro study was to evaluate the marginal microleakage of Class Ⅱ composite resin inlay restoration and to compare the marginal leakage of inlay with indirectly placed composite restoration and that of direct filling composite restoration. MO or DO cavity preparations were cut in 60 extracted human permanent molars. The experimental group was restored with Herculite XR inlay, Clearfil inlay, and E.O.S. inlay with dual cement. The control group was directly filled with Herculite XR after being etched and applied with dentin bonding agent. The specimens were thermocycled 1,000 times between 5℃ and 55℃. Microleakage was evaluated by use of the Methylene bule staining technique. The depth of microleakage was measured with stereomicroscope after the teeth were sectioned. The obtained results were as follows : 1. The marginal leakage was reduced in the order of Clearfil inlay, Herculity XR-inlay, E.O.S. inlay, and Herculite XR-direct filling group at the occlusal margin. 2. The marginal leakage was reduced in the order of Clearfil inlay, Herculity XR-inlay, Herculite XR-direct filling group and E.O.S. inlay at the gingival margin. 3. Generally, the marginal leakage was more greatly showed at the gingival margin than at the occlusal margin. 4. The marginal leakage was greatest at the gingival margin of E.O.S. inlay, and was the least at the occlusal margin of Clearfil inlay.

납착방법에 따른 임플란트 지지 보철물의 정확성

박상현,허진경,계기성 조선대학교 구강생물학연구소 2003 口腔生物學硏究 Vol.27 No.1

The Purpose of this study was to measure and compare the gap distance between implant fixture and implant framework fabricated by three techniques; (1) one-piece casting technique. (2) at the same time soldering technique after casting. (3) at the different time soldering technique after casting. Four 3i (diameter 4.0 ㎜) implant fixtures were fixed in the stone block. Implant bar framework was completed with type 111 gold alloys after it was waxed up with wax sleeve. Implant bar framework was soldered after it was cut with 0.2 ㎜ gap distance and fixed with pattern resin. Gap distances between each implant fixture and abutment, each gap distances were measured by means of stereomicroscope and micrometer ruler. The results were as follows : 1. In comparison of gap distance between implant fixture and abutment, one-piece casting technique group was 531 ㎛, soldering at the same time group was 250 ㎛,soldering at the different time group was 46 ㎛. Therefore, marginal adaptation of soldering technique group was higher than one-piece casting technique group. And marginal adaptation of soldering at the different time technique was higher than soldering at the same time technique. 2. In comparison of distance between abutment and abutment, one-piece casting technique group was 44.100 ㎜, soldering at the same time technique was 44.064 ㎜, soldering at the different time was 44.059 ㎜ and there were not significant differences.

정서강도와 정서인식의 명확성, 정서조절양식이 대인관계에 미치는 영향

박경옥,박기환 가톨릭대학교 사회과학연구소 2007 社會科學硏究 Vol.23 No.-

본 연구는 정서강도, 정서인식의 명확성, 정서조절양식이 대인관계 성향에 어떤 영향을 미치는지를 살펴보았다. 다시 말해, 정서표현갈등이 대인관계와 유의한 상관이 있다는 연구를 토대로, 정서를 표현하기 위해 선행되어야 할 정서강도 정서인식의 명확성, 정서조절양식이 대인관계에 미치는 영향을 살펴봄으로써 내담자의 대인관계 문제를 해결하기 위해 어떤 정서적 특징들을 다루어야 하는지를 탐색하는 것이 본 연구의 목적이었다. 이를 위해 서울과 충청지역에 소재하고 있는 대학교의 대학생 322명을 대상으로 정서강도, 정서인식의 명확성, 정서조절양식, 그리고 대인관계 성향을 측정하기 위한 설문조사를 실시하였다. 본 연구의 결과는 다음과 같다. 첫째, 정서강도는 대인관계 성향과 모두 상관이 있었으나, 특히 사회관계성향과 상관이 높았다. 둘째, 정서인식의 명확성은 대인관계 성향 중 사회 관계성향과 상관이 높았다. 셋째, 정서조절양식 중 능동적 양식은 대인관계 성향 모두와 상관이 있었으나, 그 중 역할성향과 상관이 가장 높았다. 회피분산적 양식은 표현성향과 상관이 높았으며, 지지추구적 양식은 사회관계성향과 상관이 높았다. 본 연구 결과는 내담자가 정서를 경험하는 정도, 내담자가 자신이 느낀 정서를 얼마나 명확히 아는지의 정도, 내담자가 사용하는 정서조절양식을 상담자가 잘 이해하게 되면, 대인관계에서 정서표현을 어려워하는 내담자를 더 효율적으로 도울 수 있다는 것을 시사한다. In this research, we studied the relationship of emotional intensity, emotional clarity and emotion regulation style with interpersonal relations, based on the assumption that emotion is included in interpersonal relations(Lehman, Ellard, & Wortman, 1986). This is on the basis of the research that ambivalence in emotional expression is closely connected with interpersonal relations. Therefore it is important to investigate the effects of emotional intensity, emotional clarity and emotion regulation style on interpersonal relations. 322 undergraduate students were asked to complete the questionnaires of emotional intensity, emotional clarity and interpersonal relations disposition. The results were summarized as follows: First, emotional intensity had significantly related to all interpersonal relations disposition, especially it was closely related to the social relations disposition. Second, emotional clarity was closely correlated with social relations disposition among the interpersonal relations disposition. Third, active style among the emotion regulation style was correlated with all interpersonal relations disposition, especially it was closely related to role disposition. And avoidance style was closely related to expression disposition. Lastly, support-seeking style was closely related to social relations disposition. This results can be used as a basic data for counselor to solve the client’s problems of interpersonal relations. If the counselor can understand the emotion regulation style of the client, the counselor may easily help the client who has experienced a difficulty of emotional expression in interpersonal relations.

임상검사 측정의 정확도 관리용 요 표준시료의 제조와 중금속 성분의 분석

박창준,조경행,서정기 大韓産業醫學會 1995 대한직업환경의학회지 Vol.7 No.2

Urine certified reference material(CRM) has been developed to help clinical labolatories control analytical accuracy. Two levels of freeze-dried urine were prepared. The low level CRM was made from normal urine and the abnormal level CRM was prepared by spiking th normal urine with As, Cd, Cr, Cu, Hg, Ni and Pb. Urine reference materials were analyzed by graphite furnace atomic absorption spectrometry(GFAAS) and inductively coupled plasma mass spectrometry(ICP-MS). Analyte elements were separated from matrix elements by using ion exchange resin and hydride generation. Isotope dilution method was employed to enhance analytical accuracy. Round robin test results are also presented which were carried out with 5 clinical laboratories.

천연 고미물질이 김치의 숙성에 미치는 영향

박인경,서기용,김순동 대구효성가톨릭대학교 식품과학연구소 1997 식품과학지 Vol.9 No.-

고미물질이 함유된 상치, 쑥갓, 치커리를 첨가한 김치를 10℃에서 숙성시키면서 pH, 산도, 색상, 관능검사를 실시하였다. 그 결과 대조구보다 고미물질 첨가군이 pH는 보다 높게, 산도는 보다 낮게 유지되었고 색상의 변화에 있어서도 뚜렷한 차이는 없었으나 고미물질 첨가군이 양호하였으며 신맛과 종합적인 맛을 평가한 관능검사에 있어서도 고미물질첨가군이 신맛의 증가가 낮으면서도 시원한 맛과 상큼한 쓴맛으로 인해서 종합적인 맛도 좋은 것으로 평가되었다. The effects of some vegegables containing bitter substance(VCBS) such as lettuce, crowndaisy, chicory on the quality and shelf-life of kimchi were investigated. The changes in pH, acidity, color, sensory quality such as sour, overall taste were determined during fermentation. The decrease in pH and increase in acidity were lower in the kimchi added VCBS than in control products. There were no differences in color changes between the kimchi added VCBS and control products during fermentation. The kimchi added VCBS was higher score than control products in sour and overall taste. These results suggest that addition VCBS was observed to influence the shelf-life and quality of kimchi.

하악 무치악 부위의 임플란트 이식을 위한 전산화단층촬영 영상의 비교 평가

선경훈,정호걸,박혁,박창서,김기덕 대한구강악안면방사선학회 2009 Imaging Science in Dentistry Vol.39 No.1

Purpose : The purpose of this study was to evaluate the clinical usefulness of the recently developed multi-detector computed tomography and cone beam computed tomography in pre-operative implant evaluation, by comparing them with the single detector computed tomography, already confirmed for accuracy in this area. Materials and Methods : Five partially edentulous dry human mandibles, with 1×1 mm gutta percha cones, placed in 5 mm intervals posterior to the mental foramen on each side of the buccal part of the mandible, were used in this study. They were scanned as follows: 1) Single detector computed tomography: slice thickness 1 mm, 200 mA, 120 kV 2) Multi-detector computed tomography: slice thickness 0.75 mm, 250 mA, 120 kV 3) Cone beam computed tomography: 15 mAs, 120 kV Axial images acquired from three computed tomographies were transferred to personal computer, and then reformatted cross-sectional images were generated using V-Implant 2.0 (CyberMed Inc., Seoul, Korea) software. Among the cross-sectional images of the gutta percha cone, placed in the buccal body of the mandible, the most precise cross section was selected as the measuring point and the distance from the most superior border of the mandibular canal to the alveolar crest was measured and analyzed 10 times by a dentist. Results : There were no significant intraobserver differences in the distance from the most superior border of the mandibular canal to the alveolar crest (p>0.05). There were no significant differences among single detector computed tomography, multi-detector computed tomography and cone beam computed tomography in the distance from the most superior border of the mandibular canal to the alveolar crest (p>0.05). Conclusion : Multi-detector computed tomography and cone beam computed tomography are clinically useful in the evaluation of pre-operative site for mandibular dental implants, with consideration for radiation exposure dose and scanning time.

학동기 비만아동의 피부두께의 통계적 관찰

김경석,나기찬,정은경,문경래,박상기,박영봉 朝鮮大學校 附設 醫學硏究所 1993 The Medical Journal of Chosun University Vol.18 No.1

The measurements of triceps skinfold thickness, body weight and height were done in children aged 7 to 12 years(3,142 boys and 2588 girls) in Kwangju in 1992. The author also observed degree of obesity, prevalence of obesity and average value of triceps skinfold thickness. The results were summarized as follows: 1) The mean value of triceps skinfold thickness acceding to age in male was 7 years 10.5mm, 8 years 10.5mm, 9 years 10.2mm, 10 years 12.3mm, 11 years 13.8mm, 12 years 12.3mm. In the female it was 7 years 11.9mm, 8 years 11.9mm, 9 years 11.6mm, 10 years 12.6mm, 11 years 14.1mm, 12 years 13.6mm. 2) The mean value of triceps skinfold thickness acceding to age in obese male was 7 years 16.3mm, 8 years 17.3mm, 9 years 16.0mm, 10 years 19.5mm, 11 years 23.7mm, 12 years 20.1mm. In the obese female it was 7 years 17.3mm, 8 years 17.9mm, 9 years 18.4mm, 10 years 19.5mm, 11 years 21.2mm, 12 years 20.3mm.

소아 백혈병의 혈청 철, 총 철결합능 Transferrin포화율 및 Ferritin치에 관한 연구

문경래,정은경,박상기 朝鮮大學校 附設 醫學硏究所 1991 The Medical Journal of Chosun University Vol.16 No.1

Author reviewed the clinical symtoms, hematological findings and serum Fe, total iron binding capadty(TIBC), transferrin saturation and levels of 40 children diagnosed as leukemia at the pediatric department of Chosun University hospital during a period of 7 years from Jan. 1983 to Dec. 1989. Also, 20 normal children as control group were studied. The results were summarized as follows: 1) The Mean±S.D. levels of the serum Fe, TIBC, transferrin saturation and ferrtin of leukemia 40 cases and control group were 126.8±37.8㎍/㎗, 276.1±37.8㎍/㎗, 47.1±15.6%, 244.5±52.7ng/㎖ and 107.2±34.2㎍/㎗, 309.9±31.8㎍/㎗, 34.7±11.4%, 69.6±30.8ng/㎖, respectively. The difference of the serum Fe levels between leukemia and normal control was statistically not significant (P>0.1) but the serum Fe, TIBC, transferrrin saturation and ferritin levels were significantly different(P<0.05, P<0.01, P<0.001). 2) The differences in the mean levels of the serum Fe, TIBC, transferrin saturation and ferfitin among the types of leukemia were not significant. 3) The differences of the serum TIBC, transferrin saturation and ferritin levels between leukemia and normal control were statistically significant. From the very high serum ferritin levels, it is thought that serum ferritinemia as tumor marker may be useful in diagnosis of leukemia.

정신분열병의 경과 중 발생하는 우울증

곽경환,박두병,최태영,민경준,이영식,기백석,나철 大韓神經精神醫學會 2002 신경정신의학 Vol.41 No.3

연구목적 : 정신분열병을 음성증상군과 양성증상군으로 나누어 두 군 사이에 우울증이 차이가 있는지를 조사하고 정신분열별의 증상과 우울증과의 연관과 정신분열병의 경과 중 보이는 우울증사의 특징에 대해서 알아보고자 하였다. 방 법 : 중앙대학병원에 입원한 총 31명(남자 13명, 여자 18명)의 정신분열병 환자를 대상으로 PANSS, BDI, HDRS와 Simpson Angus Scale을 시행하였다. 결 과 : 1) BDI 21점 이상을 기준으로 했을 때, 정신분열병의 경과 중 우울증이 발생한 환자는 총 18%였으며, 양성증상군과 음성증상군 간에 차이는 없었다. 2) 양성증상군과 음성증상군 간에 BDI, HDRS 그리고 PANSS-D 등의 점수의 차이는 없었다. 3) 주관척도인 BDI와 객관척도인 HDRS와 PANSS-D 사이의 연관은 없었다. 결 론 : 정신분열병의 우울증은 양성증상이나 음성증상의 한 부분으로 생각하기보다는 또 다른 영역으로 받아들여야 할 것으로 보인다. 임상적으로 정신분열병에서 우울증은 발생되는 비율의 정도를 고려할 대 다른 증상과 더불어 집중적인 관심이 필요하며 이와 함께 우울증으로 인한 결과와 예후의 심각성을 고려할 때 우울증에 대한 인식 및 진단과 치료에 더 많은 진전이 있어야 한다. Objective : The heterogeneity of symptomatology within the group of schizophrenias is still a major obstacle for defining clinically useful subgroups of these disorders. One of these symptoms is depression. Recently there is a growing evidence suggesting that depressive symptoms and related mood disturbances are important in treating schizophrenia. This so because of the improvement of such side effects as extraphramidal symptoms with increasing use of atypical antipsychotics. Althought depression is known to be a serious problems of many schizophrenic patients, the nature and course of depression in schizophrenia remain unknown. Methods : The author examined the depressive features in 31 patients with schizophrenia. Rating on the PANSS, BDI and HDRS were obtained. Eighteen percent of the total patients had BDI score above 21, considered depressed. Results : There were no difference in BDI, hDRS and PANSS-D between positive symptoms group and negative synptom group. There was also no correlation between subject scale(BDI) and objective scales(HDRS, PANSS-D). Conclusions : Depression in schizophrenia needs intensive studies. It is also considered as another hereogeneous domain beside negative or positive symptom domain. Out of respect for the high prevalence and serious outcome of depression in schizophrenia, a more differentiated assessment, analysis, and treatment of depressive symptom is recommended.