한국 어린이의 골 성숙도와 치아 석회화 단계 간의 상관관계

김성진,송제선,김익환,김성오,최형준,Kim, Seong Jin,Song, Je Seon,Kim, Ik-Hwan,Kim, Seong-Oh,Choi, Hyung-Jun 대한소아치과학회 2021 大韓小兒齒科學會誌 Vol.48 No.3

이 연구의 목적은 한국 아동의 골 성숙 단계와 여러 치아들의 석회화 단계 간의 상관관계를 알아보고자 하는 것이다. 만 6 - 14세의 남아 359명, 여아 384명의 수완부 방사선사진, 측방두부규격 방사선사진, 파노라마 방사선사진을 분석하여 평가하였다. 하악 좌측의 7개 영구치의 치아 석회화 단계는 Demirjian이 제시한 방법에 의해 평가되었다. 골 성숙도 단계를 평가하기 위하여 수완부 방사선 사진은 Fishman이 제시한 skeletal maturity indicators(SMI)에 따라 평가되었고, 측방두부규격 방사선사진은 Baccetti가 제시한 cervical vertebral maturation(CVM) 방법에 따라 평가되었다. Spearman의 순위상관분석을 시행한 결과 치아 석회화 단계와 골 성숙도 간에 유의미하게 높은 상관관계가 나타났다(r = 0.40-0.84, p < 0.001). 7개의 영구치 중에서 하악 제2대구치가 골 성숙도와 가장 높은 상관관계를 보인 반면 중절치가 가장 낮은 상관관계를 나타내었다. 남녀 모두에서 하악 견치의 stage G와 하악 제2대구치의 stage F가 SMI 6단계와 CS 3단계에서 나타날 확률이 가장 높았다. 이 연구의 결과에 따르면 치아 성숙도와 골 성숙도 사이에 높은 상관관계가 있으므로, 파노라마 방사선사진에서의 치아 성숙도 평가는 성장기 아동의 골 성숙도를 평가하는 보조적 수단으로 활용될 수 있다. The aim of this study was to investigate the relationships between the stages of calcification of various teeth and skeletal maturity stages among Korean subjects. The samples were derived from hand-wrist, panoramic radiographs, and lateral cephalograms of 743 subjects (359 males and 384 females) with ages ranging from 6 to 14 years. Calcification of seven permanent mandibular teeth on the left side were rated according to the system of Demirjian. To evaluate the stage of skeletal maturation, hand-wrist radiographs were analyzed by skeletal maturity indicators (SMI) system of Fishman and lateral cephalograms by cervical vertebral maturation (CVM) method of Baccetti. Statistically significant relationships were found between dental calcification and skeletal maturity stages according to Spearman rank-order correlation coefficients (r = 0.40-0.84, p < 0.001). The second molar showed the highest correlation and central incisor showed the lowest correlation for female and male subjects. For both sexes, canine stage G and second molar stage F were related to SMI 6 and CS 3. Because of the high correlation coefficients, this study suggests that tooth calcification stages from panoramic radiographs might be clinically useful as a maturity indicator of the pubertal growth period in Korean patients.

한방의료이용 행태와 이에 영향을 미치는 요인 분석

김성진,남철현,김재돈,김병화,김기열,Kim Sung-Jin,Nam Chul-Hyun,Kim Jae-Don,Kim Byoung-Ha,Kim Gi-Yeol 대한예방한의학회 2004 대한예방한의학회지 Vol.8 No.1

This study was conducted to analyze community residents' behavior of Oriental medicine utilization and its related factors in order to provide basic data for formulation of policies on Oriental medicine. The subjects of this study was 500 residents who lived in big or medium sized cities and towns or villages Data were collected from March, 2002 to June, 2002. The results of this study can be summarized as follows. 1) According to socio-demographic characteristics of the respondents, female was 50.3%; 'over 50 years old' 29.9%, 'over college graduate' 39.7%, 'housewife' 23.0%, 'having spouse' 62.1%, 'Buddhist' 50.8%, 'living in big cities' 59.0%, 'middle economic class' 88.1%. 2) The highest proportion of frequency of Oriental medicine utilization was over 10 times(32.5%). The respondents visited Oriental medicine institutions for taking invigorant(51.1%), treatment of diseases in muscle or bone system(30.8%), treatment of diseases in digestive system(6.3%), etc. 3) According to the reasons of utilizing Oriental medicine, the proportion of good effect was highest(36.3%). 66.8% of the respondents replied that Oriental medical fee was expensive, while 0.8% of them replied that it was not expensive. 33.3% of them thought it was proper. 4) 35.5% of the respondents replied that treatment by Oriental medicine could cause side effect and 40.3% of them replied that the side effect could be caused by taking herb medicine. 5) 62.8% of the respondents replied that they would continuously receive opinions on Oriental medicine. The score of knowledge level of treatment by Oriental medicine $6.25{\pm}2.82$ points on the basis of 14 points. 6) The variables significantly influencing utilization of Oriental medicine includes taking diseases, living in big cities, male, upper (economic class, having religion, and effect of Oriental medicine. 7) The factors affecting effect of herb medicine were effect of treatment by Oriental medicine, marital status, knowledge level of Oriental medicine, having diseases, and frequency of receiving the treatment.

Planetary milling에 의한 $TiN_x$의 제조

김성진,김동식,라노,박성범,권원일,김문협,우흥식,안중호,Kim, Sung-Jin,Kim, Dong-Sik,Rahno, Khamidova,Park, Sung-Bum,Gwon, Won-Il,Kim, Moon-Hyup,Woo, Heung-Sik,Ahn, Joong-Ho 한국결정성장학회 2005 한국결정성장학회지 Vol.15 No.3

[ $TiN_x$ ] powder have been fabrication by making of reaction between titanium powder and $Si_3N_4$ bowl during a planetary milling. Milling times were maintained for 1 hour, 5 hours, and 10 hours, respectively. The XRD result showed existence of non-stoichiometric compound of $TiN_{0.26}$ after 5 hours milling and coexistence of TiN with $TiN_{0.26}$ after 10 hours milling. Particle size distribution was investigated by particle size analyzer and microstructure was analyzed by FE-SEM. The size of titanium was decreased with increasing the milling time and the mean size of $TiN_x$ after 10 hours milling was increased by 200 nm. Planetary milling법을 사용하여 Ti 분말과 $Si_3N_4$ bowl과의 반응을 유도하여 $TiN_x$을 제조하였으며, 이때 milling 시간은 1시간, 5시간, 10시간으로 조정하였다. 시편의 물성평가는 X선 회절분석을 통해 결정상의 변화를 분석한 결과 milling 시간이 5시간이 되면 비화학당량적 화합물인 $TiN_{0.26}$가 먼저 생성되고 10시간의 milling에서는 $TiN_{0.26}$과 TiN이 혼재되어 있는 것으로 확인되었다. 입도분석 및 FE-SEM으로 미세구조 분석을 한 결과, milling 시간이 증가함에 따라 Ti 입자사이즈가 감소하는 것으로 나타났으며, 10시간의 milling에서는 평균사이즈가 200nm의 $TiN_x$를 제조할 수 있었다.

스프레이 코팅된 탄소나노튜브 박막을 이용한 알코올 가스 센서

김성진,Kim, Seong-Jeen 한국전기전자재료학회 2008 전기전자재료학회논문지 Vol.21 No.9

We suggest a CNT-based gas sensor for breath alcohol measurement. The sensor was composed of single-walled carbon nanotubes (SWCNTs) thin film on flexible PES (polyethersulfone) substrate, and the SWCNTs thin film was formed by multiple spray-coating with SWCNTs solution which was well-dispersed, highly controlled and functionalized in ethanol solvent. In this work, three types of SWCNTs thin films were deposited with changes in the number of spray-coatings to 20, 40 and 60 times in order to compare electrical response properties of the SWCNTs thin films. from the fabricated sensors, conductance and capacitance responses were measured and discussed. Alcohol gas sensors have been commercialized widely as gauge for breath alcohol measurement which is applicable to checking whether car drivers are drinking-driving or not. Our alcohol gas sensors showed good sensitivity and linearity even at room temperature.

Unified Optimal Power Allocation Strategy for MIMO Candidates in 3GPP HSDPA

김성진,이광복,Hojin Kim 한국전자통신연구원 2005 ETRI Journal Vol.27 No.6

We compare the achievable throughput of time division multiple access (TDMA) multiple-input multiple-output (MIMO) schemes illustrated in the 3rd Generation Partnership Project (3GPP) MIMO technical report, versus the sum-rate capacity of space-time multiple access (STMA). These schemes have been proposed to improve the 3GPP high speed downlink packet access (HSDPA) channel by employing multiple antennas at both the base station and mobile stations. Our comparisons are performed in multi-user environments and are conducted using TDMA such as Qualcomm’s High Data Rate and HSDPA, which is a simpler technique than STMA. Furthermore, we present the unified optimal power allocation strategy for HSDPA MIMO schemes by exploiting the similarity of multiple antenna systems and multi-user channel problems.

전자저널 컨소시엄을 둘러싼 학술커뮤니케이션의 쟁점과 대응동향

김성진,정은경,한민혜,Kim, Sung-Jin,Jung, Eun-Kyung,Han, Min-Hae 한국과학기술정보연구원 과학기술정보센터 2008 Journal of Information Science Theory and Practice Vol.39 No.1

Electronic information, especially e-journals took their position as core resources in current scholarly communication. However, the publishing and pricing structure of e-journal licensing process have not yet succeeded to be reorganized in accord with newly changed electronic scholarly communication environment. That resulted in a lot of challenges scholarly communication now faced. This study aimed to analyze key issues regarding big deal, pricing, licensing, archiving, copyright and public access by conducting comprehensive literature review and examining movements of world wide scholarly institutes and alliances. And then this study eventually purposed to draw some strategies which domestic libraries and consortia should take in order to lead current changes in scholarly communication. 전자저널은 학술커뮤니케이션의 핵심자원으로 자리매김하였다. 그러나 학술시장의 출판 및 가격책정구조가 새롭게 변화한 전자환경에 발맞추어 합리적으로 변모하지 못함으로 인해 전자저널 컨소시엄을 둘러싼 학술커뮤니케이션은 여러 문제점에 봉착하였다. 본 연구는 포괄적인 문헌연구 및 각국의 학술연구 기관 및 단체의 활동 분석을 통해 전자저널 구독 관련 주요 쟁점사항을 빅딜, 가격모형, 라이선스 계약, 아카이빙, 독점 및 저작권 측면에서 검토하였다. 나아가 이러한 이슈들에 대한 국제적인 대응동향을 표준 라이선스 개발, 이용통계의 표준화, 전자저널 아카이빙, 공공접근 활성화 측면에서 살펴보며 변화하는 학술커뮤니케이션 환경에서 국내 도서관 및 컨소시엄이 취해야 하는 전략들을 고찰해보았다.

비휘발성 메모리소자로의 응용의 관점에서 PLZT(10/y/z) 박막에서의 Zr/Ti 농도변화 효과

김성진,강성준,윤영섭,Kim, Seong-Jin,Gang, Seong-Jun,Yun, Yeong-Seop 대한전자공학회 2001 電子工學會論文誌-SD (Semiconductor and devices) Vol.38 No.5

비휘발성 메모리 소자로의 응용의 관점에서, sol-gel 방법으로 La 을 10mo1% 로 고정시킨 PLZT (10/y/z) 박막을 제작하여 Zr/Ti 조성비에 따른 구조적 및 전기적 특성을 조사하였다. PLZT(10/40/60) 박막은 로제트와 파이로클로르 상이 관찰되었으며, Zr/Ti 조성비에서 Ti 함유량이 증가함에 따라, (100) 배향성, 결정립 크기와 표면 거칠기는 증가되었다. 또한 Zr/Ti 조성비에서 Ti 함유량이 증가함에 따라, 10㎑ 에서 비유전율은 600 에서 400 으로 감소된 반면, 유전손실은 0.028 에서 0.053 로 증가되었으며, 170 ㎸/cm 에서 누설전류밀도는 1.64×10/sup -6/ 에서 1.26×10/sup -7/A/㎠ 으로 감소되었다. 그리고 ± 170㎸/㎝ 에서 측정한 PLZT 박막의 이력곡선을 측정한 결과, Zr/Ti 조성비가 40/60 에서 0/100 로 변화함에 따라 PLZT 박막의 잔류분극과 항전계는 6.62 에서 12.86 μC/cm2, 32.15 에서 56.45㎸/㎝ 로 각각 증가되었으며, 피로와 retention 특성 역시 개선되었다. PLZT 박막에 ±5V 의 사각펄스를 10/sup 9/ 회 인가하여 피로특성을 측정한 결과, PLZT(10/40/60) 박막의 잔류분극은 초기분극값으로부터 50% 감소된 반면, PLZT(10/0/100) 박막은 30% 감소되었다. 또, 10/sup 5/ 초의 retention 결과에서 PLZT(10/0/100) 박막은 초기분극값에서 오직 11% 만이 감소된 반면, PLZT(10/40/60) 박막은 40% 감소되었다. The effects of Zr/Ti concentration ratio in PLZT (10/y/z) thin films prepared by sol-gel method are investigated for the NVFRAM application. Rosette and pyrochlore phase are observed in PLZT (10/40/60) thin film and the (100) orientation, the grain size, and the surface roughness of PLZT thin films increase due to the increase of Ti amount in Zr/Ti concentration ratio. As Ti amount of Zr/Ti concentration ratio increases, the dielectric constants at 10KHz decrease from 600 to 400, while the loss tangents increase from 0.028 to 0.053 and the leakage current densities at 170 kY/cm decrease from 1.64$\times$10$^{-6}$ to 1.26$\times$10$^{-7}$ A/$\textrm{cm}^2$. In the results of hysteresis loops measured at $\pm$ 170 ㎸/cm, the remanent polarization and the coercive field increase from 6.62 to 12.86 $\mu$C/$\textrm{cm}^2$ and from 32.15 to 56.45 ㎸/cm, respectively, according to the change from 40/60 to 0/100 in Zr/Ti concentration ratio. Fatigue and retention properties also improve much as the Zr/Ti concentration ratio change from 40/60 to 0/100. After applying 10$^{9}$ square pulses with $\pm$5V, the remanent polarization of the PLZT (10/40/60) thin film decreases 50% from the initial state while that of the PLZT (10/0/100) thin film decreases 30%. In the results of retention measurements of 10$^{5}$ s, the remanent polarization of the PLZT (10/0/100) thin film decreases only 11% from the initial state, while that of the PLZT (10/40/60) thin film decreases 40%.

전자저널 관리를 위한 이용통계의 효과적 활용 방안

김성진,Kim, Sung-Jin 한국과학기술정보연구원 과학기술정보센터 2010 Journal of Information Science Theory and Practice Vol.41 No.4

제한된 예산, 고가의 패키지 구독비, 출판사 주도의 라이선스 협상 등의 불리한 환경에서 자관의 실정에 맞는 전자저널을 구성하기 위해 도서관은 전자저널 이용데이터를 수집하고 분석해야 한다. 본 연구는 전자저널 이용통계 연구 동향 및 COUNTER 3판에 근거한 이용통계 제공 현황을 살펴보고 현장에서 쉽게 활용 가능한 이용통계 분석의 가이드라인을 제시하고자 하였다. 현재 제공되는 이용통계 보고서를 기반으로 분석할 수 있는 핵심 이용통계치로 저널별 원문이용도, 저널이용률, 원문이용단가, 고이용군, 저이용군을 제안함으로써 전자저널 관리를 위한 이용통계의 효과적인 활용 방안을 다루었다. Libraries are encountering hostile conditions around journal licensing such as limited budget, the high price of packages, and vendor-led negotiation. They need to collect and analyze usage data of electronic journals to develop electronic journal collection appropriate for their own circumstances. The purpose of this study is to suggest an practical guideline for librarians' analysis of electronic journal usage statistics. For this, the study reviewed related previous studies and examined current state on usage statistics provided from COUNTER release 3 compliant vendors. Finally this study proposed five core statistics including full-text article request per journal, journal using rate, price per full-text article request, most use group, and low use group, and further discussed how to use them effectively for the electronic journal management.

입원한 조현병 환자의 신체이미지 왜곡

김성진,문석우,김대호,Kim, Sung-Jin,Moon, Seok-Woo,Kim, Daeho 대한생물정신의학회 2012 생물정신의학 Vol.19 No.4

Objectives Body image distortion is found in eating disorder and obesity and there are some evidence that schizophrenia is associated with body image distortion. This study sought to find whether schizophrenic patients report more body image distortion than healthy individuals and whether it is related with symptomatology. Methods A total of 88 inpatients with schizophrenia and 88 healthy controls were recruited. Weight, height, and body image accuracy were assessed in all participants, and assessment of mood, psychotic symptom severity and self-esteem, and personal and social performance scale were conducted. Results The patients with schizophrenia had higher Body Mass Index (p < 0. 001) and underestimated their body size more than controls (26.14% vs. 5.13%, p < 0.001). Multiple regression analysis showed that lower depressive symptoms and higher scores of general psychopathology predicted underestimation of body size. Conclusion Weight gain and metabolic syndrome are common adverse events of pharmacological treatment of schizophrenia. Thus, underestimation of body size among patients with schizophrenia may interfere with effort to lose weight or seek weight reduction programs. Clinicians need to consider possible unterestimation of underestimation of body size in patients whose general symptomatology is severe.

청소년기 여아에서 만성적인 좌측 측복부 통증으로 진단된 골반울혈증후군 1례

김성진,심혜선,강성길,손병관,이병익,조순구,이지은,Kim, Sung-Jin,Shim, Hae-Sun,Kang, Sung-Gil,Son, Byong-Kwan,Lee, Byong-Ik,Cho, Soon-Ku,Lee, Ji-Eun 대한소아신장학회 2007 Childhood kidney diseases Vol.11 No.1

측복부 통증은 신, 상부 요로계 질환의 대표적인 척도로 여겨지나 드물게 골반울혈증후군도 감별해야 한다. 골반울혈증후군은 가임기 경산부 여성에서 호발하나 소아청소년기에 원인이 불명확한 측복부 통증을 호소할 때 고려해야 할 질환이다. 저자들은 청소년기 여아에서 만성적인 좌측측복부 통증으로 진단된 골반울혈증후군 1례를 경험하였기에 보고하는 바이다. Flank Pain is a leading indicator of renal and upper urinary tract disease or trauma, and rarely results from pelvic congestion syndrome. Although pelvic congestion syndrome occurs commonly in multi-parous women, pelvic congestion syndrome should also be considered as the cause of flank pain in an adolescent girl. We report the first case of pelvic congestion syndrome presenting with chronic left flank pain in an adolescent girl.