한국 대학생들의 맞춤법 오용실태: 후속연구

이진성(Lee Jinsung) 한국사회언어학회 2014 사회언어학 Vol.22 No.3

This study is a follow-up study of Lee's(2001) “A study of malpractice of orthography among Korean college students-with a special emphasis on the influence of chatting language”. Within the similar research framework, Some malpractice of orthography in current college students' essays were compared with those of Lee's. The aim of this study, therefore, is to find out how, in what aspects and extents, the influence of chatting language on formal written language has manifested different characteristics after a span of 13 years. Regardless of the drastically increased use of chatting language these days, most of its characterizing features were found to be significantly declined in current students' essays, compared with Lee's(2001). Expressions or vocabularies mainly suitable for spoken colloquial language, however, were observed to be adopted much more frequently and freely in formal written essays. This study additionally investigated the Korean orthography rules on separating words, which were not dealt in Lee's. Violations relating to separating words were found to be seriously grave, which can be considered as a direct negative influence of general writing practice of chatting language, where the rules are routinely ignored chiefly for the economy of space and time.

Large Scale Gap 시험의 전산모사연구

이진성,박정수,이영신,Lee, Jin-Sung,Park, Jung-Su,Lee, Young-Shin 한국군사과학기술학회 2011 한국군사과학기술학회지 Vol.14 No.5

This study describes computational simulation results in 2-dimensional and 3-dimensional space concerning large scale gap test(LSGT) by using commercial hydrocode such as AUTODYN and LS-DYNA to analyze the detonation phenomenons of high explosives. To consider the possibilities of LSGT simulation, we used Lee - Tarver reaction rate model of PBX-9404 and Comp-B which were implemented AUTODYN's material library. Also we have tried the diverse numerical schemes such as Lagrangian, Eulerian and ALE(Arbitary Lagrangian Eulerian), SPH(Smoothed Particle Hydrodynamics) in LSGT simulations. After LSGT simulations, we compared the simulation results with published results to verify the LSGT simulations. According to the LSGT simulations, we have concluded as follows. In 2-dimensional and 3-dimensional space, Lagrangian solver provided the most reliable results based on analysis time and accuracy. When using two hydrocodes in 2-dimensional space, the simulation results are almost same except one explosive model. We have verified the modeling method and simulation results of the LSGT by using the commenrcial hydrocode in this study.

수면과 통증

이진성,정도언,Lee, Jin-Seong,Jeong, Do-Un 대한수면의학회 2012 수면·정신생리 Vol.19 No.2

The reciprocal interaction between sleep and pain has been reported by numerous studies. Patients with acute or chronic pain often complain of difficulty falling asleep, frequent awakenings, shorter sleep duration, unrefreshing sleep, and poor sleep quality in general. According to the majority of the experimental human studies, sleep deprivation may produce hyperalgesic changes. The selective disruption of slow wave sleep has shown this effect more consistently, while results after selective REM sleep deprivation remain unclear. Patients with chronic pain have a marked alteration of sleep structure and continuity, such as frequent sleep-stage shifts, increased nocturnal awakenings, decreased slow wave sleep (SWS), decreased rapid eye movement (REM) sleep, and alpha-delta sleep. Many analgesic medications can alter sleep architecture in a manner similar to the effects of acute and chronic pain, suppressing SWS and REM sleep.

대사질환의 응급 처치

이진성,Lee, Jin-Seong 대한유전성대사질환학회 2003 대한유전성대사질환학회지 Vol.3 No.1

귀금속 관리를 위한 900 MHz Near Field RFID 시스템에 관한 연구

이진성,이경환,정유정,Lee, Jin-Seong,Lee, Kyoung-Hwan,Chung, Chung-You 한국통신학회 2010 韓國通信學會論文誌 Vol.35 No.1b

본 논문에서는 귀금속 분야의 매장 업무 효율성 향상과 제품 정보 및 유통 이력 정보를 실시간으로 소비자에게 제공하기 위한 900 MHz 근거리 인식용 고정형 RFID 시스템에 관한 연구를 하였다. 개발된 귀금속 관리용 RFID 시스템은 리더, 리더 안테나, CPU로 구성되어 일체형이며, 전체 크기는 $38\;{\times}\;25\;{\times}\;19\;cm^3$, 안테나 동작 주파수는 905 ~ 926 MHz, 안테나의 최고 이득은 5.1 dBii(@910 MHz) 이다. 근거리 상용태그를 비교 하였을 때, 귀금속 분야에 가장 적합한 태그는 RSI사(社)의 Honeycomb이며, Honeycomb의 인식률을 높이기 위한 태그 부착 방법과 위치 등을 제안 하였다. 제안된 시스템에서 태그의 최대 인식거리는 16 cm이며, 태그의 인식률이 100 %가 되는 영역은 안테나의 레이돔에서 높이 10 cm까지 이다. A fixed 900 MHz near field RFID system is developed to provide information; market efficiency, jewelry information and the circulation history information in real time, to the customers. The developed RFID system for the jewelry management consists of a reader, antenna and a CPU in a integrated type. The system size is $38\;{\times}\;25\;{\times}\;19\;cm^3$, the operated frequency band of the reader antenna is 905 ~ 926 MHz. The maximum gain of the embedded reader antenna is 5.1 dBii(@ 910 MHz). Honeycomb tag manufactured by RSI Co. is suitable for the jewelry management than another other commercial near field tags. The tagging method and the tagging location of Honeycomb tag are suggested. In the suggested system, the maximum reading range is about 16 cm, and the zone with 100 % recognition rate is 10 cm from the radom of the reader antenna.

아르헨티나 화장품 용기시장 동향

이진성,Lee, Jin-Seong (사)한국포장협회 2020 包裝界 Vol.323 No.-

흉부 경피적 세침 흡인생검에서 비특이적인 결과의 의미

이진성,송군식,임태환,Lee, Jin-Seong,Song, Gun-Sik,Im, Tae-Hwan 대한영상의학회 2003 대한영상의학회지 Vol.48 No.5

목적: 흉부 경피적 세침 흡인생검(FNAB)에서 비특이적인 결과의 의미와 재검사의 유용성에 대해 알아 보고자 하였다. 대상과 방법: 1997년부터 2001년까지 본원에서 FNAB를 시행한 환자 1845예 중 비특이적인 결과를 보인 531예를 ‘부적합 조직‘과 ‘염증성 세포’,‘괴사조직’, ‘비정형적 세포’로 나누었으며 추적검사하여 최종진단을 통해 분석하였다. 또한 이들 중 임상적 혹은 방사선학적으로 악성종양이 의심되는 경우, 동일부위에서 1개월 이내에 2회 이상 재검사를 시행한 환자 207명을 대상으로 재검사 결과를 첫 번째 검사의 결과와 비교, 분석하였다. 결과: 첫 FNAB의 결과가 비특이적인 531예 중 255예에서 ‘염증성 세포’로 나왔고, 그 중 120예에서 추적검사상 병변의 크기가 감소하여 양성질환으로 판명되었다. 또 50예에서는 ‘비정형적 세포’가 나왔고, 이 중 58%인 29예에서 추후에 악성종양으로 진단되었다. 첫 FNAB의 결과가 비특이적으로 나온 531예에서 임상적 혹은 방사선학적으로 악성 종양이 의심되는 207예에서 재검사를 시행하였고, 이 중 101예에서는 비특이적인 결과를 얻었으며, 106예에서는 특이진단을 내릴 수 있었다. 특히 ‘비정형적 세포’로 나온 30예 중 73%인 22예에서 재검사를 통해 악성종양으로 진단되었다. 결론: FNAB를 시행하여 ‘비정형적 세포’가 나오면 악성 종양으로 진단될 확률이 58%이상으로 높았다. 또한 그 밖의 다른 비특이적인 결과를 얻은 경우에도 악성종양의 가능성을 무시할 수 없으며, 임상적 혹은 방사선학적으로 악성 종양이 의심된다면, FNAB를 반복 시행하는 것이 바람직하며, 재검사가 정확한 진단에 도움이 될 것이다. Purpose: To know what is the meaning of non-diagnostic results of fine needle aspiration biopsy (FNAB) and whether repeated aspiration is needed or not in those situations. Materials and Methods: We reviewed 1845 patients who underwent FNAB from 1997 to 2001. Non-diagnostic results of the first FNAB were divided into four groups: insufficient number of cells, inflammatory cells, necrotic debris and atypical cells. We analyzed final diagnosis of 531 patients who had non-diagnostic results from the first FNAB. Among them, 207 lesions were re-biopsied because of clinical and radiologic suspicion of malignancy. The diagnostic yield of repeated FNAB was analyzed and compared with the results of the first FNAB. Results: Among 255 cases with "inflammatory cells only"results, 120 cases were confirmed benignancy on follow-up. Twenty nine of 50 atypical cells (58%) were malignant on follow-up. One hundred one of 207 repeated FNAB resulted in the non-diagnostic reports, and 106 of 207 repeated FNAB were diagnosed as specific diagnosis. Among thirty lesions showing atypical cells on the repeated FNAB, 22 (73%) were identified as malignant neoplasms. Conclusion: When the specimen of FNAB shows atypical cells, the possibility of malignancy is very high. When the results of FNAB is non-diagnostic in the cases with clinical and radiological suspicion of malignancy, repeated FNAB procedures should be seriously considered and will be helpful for accurate specific diagnosis.

폐쇄성 수면무호흡증에서 지속적 상기도 양압술 압력 처방 검사 시 나타나는 수면분절의 감소

이진성,정도언,Lee, Jin-Seong,Jeong, Do-Un 대한수면의학회 2008 수면·정신생리 Vol.15 No.2

목 적:폐쇄성 수면무호흡증은 수면분절과 수면구조의 변화를 초래해 야간 수면의 질을 저하시킨다. 이 연구에서는 폐쇄성 수면무호흡증 환자에서 야간 수면다원검사와 지속적 상기도 양압술 처방압력 검사 중에 나타나는 수면분절지수의 변화와 이와 관련된 요인을 비교하였다. 방 법:야간 수면다원검사 결과 수면무호흡증으로 진단되고 지속적 상기도 양압술 처방압력 검사를 받은 환자 103명을 대상으로 하였다. 대상군의 임상적 특징을 조사하였으며 기초 측정일과 양압술 시행일의 수면분절지수를 포함한 수면 변인들을 비교하였다. 두 검사 사이의 변인 비교는 짝짓기 t-test로, 수면분절지수와 수면 변인의 관계는 Pearson 상관 분석으로 하였다(p<0.05, 양측 검정). 결 과:양압술 시행 시 기초 측정일에 비하여, 1단계수면 분율(%)은 유의하게 감소하였고 렘수면 잠복시간(REM latency)은 유의하게 단축되었다. 2단계수면 분율(%), 서파수면 분율(%) 그리고 렘수면 분율(%)은 증가하였다(p<0.05). 수면분절지수는 기초 측정일 $29.0{\pm}13.8$, 양압술 시행일 $15.2{\pm}8.8$로 감소하였다(t=9.7, p<0.01). 수면분절지수와 수면효율(%) 및 총수면시간은 음의 상관관계(r=-0.60, p<0.01;r=-0.45, p<0.01)가, 호흡장애지수와는 양의 상관관계(r=0.28, p<0.01)가 있었다. 결 론:폐쇄성 수면무호흡증에서 수면분절지수는 야간수면의 분절 정도 및 질환의 중증도를 잘 반영해주고 있어 진료에 보조적인 가치가 있을 것이다. Objectives: Obstructive sleep apnea syndrome (OSAS) not only causes respiratory disturbances during sleep but also decreases the quality of nocturnal sleep through sleep fragmentation and sleep structure change. We aimed at comparing the changes in sleep fragmentation and structure between baseline (diagnostic) nocturnal polysomnography (NPSG) and nCPAP (nasal continuous positive airway pressure) titration trial. Methods: One hundred and three patients with a baseline night of respiratory disturbance index (RDI) of 5 or greater and reduced RDI score during nCPAP titration night were retrospectively selected for the study. Sleep fragementation and sleep structure between baseline NPSG and the NPSG during nCPAP titration were compared. Sleep fragmentation index (SFI) was defined as the total number of awakenings and shifts to stage 1 sleep divided by the total sleep time in hour. SFI and other polysomnographic parameters were statistically compared between the two nights. Results: SFI during baseline NPSG and nCPAP titration nights were $29.0{\pm}13.8$ and $15.2{\pm}8.8$, respectively, indicating a significant SFI decrease during nCPAP titration (t=9.7, p<0.01). SFI showed significant negative correlations with sleep efficiency (r=-0.60, p<0.01) and total sleep time (r=-0.45, p<0.01) and a positive correlation with RDI (r=0.28, p<0.01). Conclusion: Use of nCPAP, even during the titration, significantly decreases sleep fragmentation and improves sleep structure in OSAS patients. We suggest that SFI may be utilized as a measure of assessing OSAS severity and nCPAP efficacy.

원통형 회전 히트파이프의 내부 유동 및 열전달 특성에 관한 연구

이진성,이재준,김철주,Lee, Jin Sung,Lee, Jae Jun,Kim, Chul Ju 대한기계학회 1998 大韓機械學會論文集B Vol.22 No.9

In order to elucidate the operational characteristics of rotating heat pipes, the internal flow patterns and heat transfer performance are investigated. Flow patterns and its transition are studied with various rotational speeds by visualizing flows established inside a rotating tube. To verify those results of analysis, 2 heat pipes of the same geometries but fill charge rates of 7, 30% were manufactured and submitted to operating tests. Comparison of experimental results on heat transfer rate show a fairly good agreement with the analytical results. The analysis reveals that the optimum charge ratio is ranged in 4~7% depending on the quantity of thermal loads. but the heat pipe with 7% of fill charge ratio reached dry-out limitation at heat flux of $q^{{\prime}{\prime}}=6.2kW/m^2$ lower than that of analytic results. Transition of flow regime was well related to the correlation by Semena & Khmelev on transient centrifugal Froude Number Frc. But hysteresis phenomenon was observed in transition of flow regime, when the rotational speed was stepwisely changed in the way to undergo 1 cycle.

규산염계 광물의 급여가 산란계분의 암모니아 발생과 생산성에 미치는 효과

이진성,강성원,윤진아,손용석,Lee, Jin-Sung,Kang, Sung-Won,Yoon, Jin-A,Son, Yong-Suk 한국축산환경학회 2009 축산시설환경학회지 Vol.15 No.3

산란계에 대한 비금속광물의 급여가 계사내 암모니아 발생 및 생산성에 미치는 영향을 평가하기 위하여, 49주령의 갈색 Lohman 종 산란계 1,020수에 대하여 사료용 공시광물로 소디움벤토나이트, 장석 및 세사를 사료섭취량의 2% 수준으로 첨가 급여하면서 분에서 발생하는 암모니아 농도 및 산란율, 난각강도 등을 조사하였다. 소디움벤토나이트 및 장석 급여구는 세사 급여구에 비해 계분에서 발생하는 암모니아 농도를 유의적으로 감소시키고(P<0.05) 계분 내 질소 함량은 증가시킴으로써 이들 규산염광물질의 급여가 암모니아 발생을 억제함을 보여줌과 동시에 친환경 유기질 비료로서의 가능성을 시사하였다. 또한 산란수에 있어서 처리구 간에 통계적으로 유의한 차이는 나타나지 않았으며(p>0.05), 난각강도의 경우 장석 급여군이 유의적으로 낮게 나타났으나(p<0.05) 기존에 보고된 연구결과와 비교해볼 때 우려할 만한 수준은 아닌 것으로 판단된다. 결론적으로 산란계에 대한 규산염계 광물 소디움벤토나이트와 장석의 급여는 생산성에 영향을 미치지 않으면서 계분의 암모니아 발생을 최소화시키는 효과를 발휘하는 것으로 사료된다. This study was conducted to investigate the effects of dietary silicate minerals on ammonia emission from the excreta and performance in laying hens. A total of one thousand and twenty 49 week-old Lohmann brown layers were divided into three treatment groups consisting two replicates of 170 birds each. The experimental diets were containing three kinds of silicate minerals (Sand, Na-bentonite and SY feldspar) added at the level of 2% by top-dressing. Ammonia emission from the excreta was significantly decreased (p<0.05) by the supplementation of Na-bentonite or SY feldspar. N concentration of the excreta was significantly higher (p<0.05) for the hens fed Na-bentonite or SY feldspar compared to those fed sand. However, no significant differences were observed in feed intake and laying performance with over 80% laying rate observed for all the treatments. Egg shell strength was diminished when SY feldspar was added to the diet. As a whole, the results obtained from the experiment indicated that supplementation of Na-bentonite or SY feldspar added at 2% to the laying hen diet should not affect laying performance but help to reduce ammonia from the excreta at the same time.