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계획된 경로를 가진 이동 객체의 불확실한 미래 시간 추정
원호경 ( Ho Gyeong Won ),정영진 ( Young Jin Jung ),이양구 ( Yang Koo Lee ),류근호 ( Keun Ho Ryu ) 한국정보처리학회 2005 한국정보처리학회 학술대회논문집 Vol.12 No.2
이동 객체 데이터베이스에서 위치 불확실성은 이동 객체의 고유한 성질 중 하나이다. 이것은 모델링과 질의 처리 및 질의 결과에 예상치 못한 문제들을 야기시키기 때문에 이를 해결하기 위해 많은 연구들이 진행되어 왔다. 이전의 연구들은 객체의 최근 속력과 방향 정보를 사용하여 불확실한 객체의 위치를 추정하였다. 이 방법은 추정이 간단하고 가까운 미래의 위치와 시간 추정에는 유용하지만 계획된 경로를 가진 미래의 먼 위치와 시간의 추정에는 적합하지 않다. 따라서, 이 논문에서는 계획된 경로를 가진 이동객체의 미래의 불확실한 시간을 추정하는 방법을 제안한다. 계획된 경로를 이동하는 객체일지라도 기계적인 오류와 예기치 못한 상황들로 인하여 실제 객체의 위치와 계획된 경로는 정확히 일치 하지는 않는다. 그렇지만 객체의 위치는 계획된 경로에 근접하여 위치할 확률이 가장 높으므로 우리는 계획된 경로에 객체의 궤적을 투영시킨다. 또한 미래의 시간을 추정을 위하여 웹사이트에서 제공하는 차량의 평균속도를 사용한다. 제공된 평균 속도는 일반 차량의 평균 속도이므로 우리는 이를 가공하여 미래 시간을 추정한다.
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김현,원호경,김호중,이서영,이강현,황성오,Kim Hyun,Won Ho Kyong,Kim Ho Jung,Lee Seo Young,Lee Kang Hyun,Hwang Sung Oh 대한임상독성학회 2004 대한임상독성학회지 Vol.2 No.2
Purpose: This study was to investigate the effects of ethanol in ingested patients by analyzing data from a single institution's registry, Methods: We conducted a prospective study of 50 patients who has ingested drugs with/without ethanol came to emergency department from January 2004 to May 2004. Only patients over 18 years of age were included. Clinical characteristics, general and specific treatment, laboratory finding, complication, and clinical outcomes were obtained from protocol. Patients were divided into two groups: drug ingested with alcohol (ethanol group, n=18), and ingested without alcohol (non-ethanol group, n=32). Results: The age, the amout of ingestion, the time to treatment, the systolic blood pressure, the diastolic blood pressure and the shock duration were not different between two groups. The AST level with the ethanol group was higher than with the non-ethanol group ($230.94\pm518.88$ U/L vs $43.22\pm63.39$ U/L, p=0.002). The ALT level with the ethanol group was higher than with the non-ethanol group ($97.06\pm152.98$ U/L vs $32.75\pm43.10$ U/L, p=0.001). The lactic acid level with the ethanol group was higher than with the non-ethanol group ($7.40\pm6.33$ mmol/L vs $3.77\pm3.10$ mmol/L, p=0.001). The hospital stay duration and the admission rate were not different between two groups. Conlusions: The ethanol increased the levels of serum AST, ALT and lactic acid in intoxicated patients. But the ethanol dose not increase admission rate and duration of admission stay in intoxicated patients.
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약물중독에 의한 내원 전 심정지 환자의 특성과 심폐소생술 결과
김윤권,김현,원호경,이권일,오성범,문중범,이강현,황성오,Kim Yun Kwon,Kim Hyun,Won Ho Kyong,Lee Kwon Il,Oh Sung Bum,Moon Joong Bum,Lee Kang Hyun,Hwang Sung Oh 대한임상독성학회 2005 대한임상독성학회지 Vol.3 No.2
Purpose: This study was to investigate the resuscitation outcomes and the clinical characteristics of non-traumatic drug-induced out-of-hospital cardiac arrest by analyzing data from a single institution's registry. Method: We conducted a retrospective study of 795 patients who came to the emergency department with non-traumatic drug-induced out-of-hospital cardiac arrest during the period $1991{\~}2004$. Only patients over 18 years of age were included. Clinical characteristics. variables associated with cardiac arrest, and data during resuscitation were obtained from our cardiac arrest database. Patients were divided into two groups: drug-induced cardiac arrest (drug group, n=33), and non drug-induced cardiac arrest (non-drug group, n=762). Results: Spontaneous circulation was restored in 23 ($72{\%}$) patients in the drug group and in 314 ($45{\%}$) patients in the non-drug group ($x^2=0.020$). The patients who discharged alive number were 46 ($6{\%}$) in the non-drug group and 0 ($0{\%}$) in the drug group ($x^2=0.005$). The witnessed arrest, the epinephrine doses, and total defibrillation energy were not different between two groups. Conclusion: The return of spontaneous circulation rate was higher in the drug group than the non-drug group. However the drug group was lower survival discharge rate than in the non-drug group.
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비전형적인 급성충수염의 복부 전산화 단층촬영과 임상 소견의 비교
박경혜,이강현,김윤권,원호경,김선휴,장요수,김현,황성오,장용수 대한응급의학회 2006 大韓應急醫學會誌 Vol.17 No.4
Comparison of Abdominal ComputerizedTomography and Clinical Findings inAtypical AppendicitisKyung Hye Park, M.D., Kang Hyun Lee, M.D., YunKwon Kim, M.D., Ho Kyong Won, M.D., Seon HyuKim, M.D., Yong Soo Jang, M.D., Hyun Kim, M.D.,Sung Oh Hwang, M.D. Purpose: The frequency of computerized tomography (CT)for diagnosing of atypical acute appendicitis, as ordered byemergency physicians, was noted. According to abdominalCT findings, the severity of acute appendicitis is divided intosix grades that are used for diagnosis and treatment. However, whether or not the laboratory and clinical findingsof atypical acute appendicitis have a relation to the gradingof abdominal CT scans is unknown. This study was performedto evaluate the correlation between CT grades andsymptoms, signs and operative and pathologic findings ofatypical acute appendicitis. Methods: This study included 412 patients who wereadmitted and underwent an appendectomy from January2004 to June 2005. An abdominal and pelvic CT scan wasperformed in 114 patients who had atypical presentations inthe emergency room. The abdominal and pelvic CT scaleswere correlated with clinical signs, laboratory findings, andpathology reports. The CT scale for appendicitis is a sixgradescale from normal (grade 0) to periappendicealabscess (grade 5). Results: Sixty-six patients were male and 48 were female,and the mean age was 50.7±22.0 years old. On theabdominal CT, grade 0 (normal) was 3 patients (2.6%),grade 1 (probable appendicitis) 5 (4.4%), grade 2 (appendicitis)17 (14.8%), grade 3 (appendicitis with periappendicitis)47 (40.9%), grade 4 (appendicitis with rupture) 30(26.1%), and grade 5 (complicated appendicitis) 12(10.4%). There was no significant difference between CTgrades and either local tenderness or rebound tendernessin the right lower quadrant abdomen (p>0.296). Howeverincreased body temperature correlated with higher CTgrades (p=0.01). There were significant differences in theneutrophil count (p<0.001), but not the white blood cellcount (p=0.493). The severity of pathology of acute appendicitiscorrelated with the CT grade (R=0.468, p=0.004). Conclusion: There was no significant correlation of localand rebound tenderness on right lower quadrant abdomenand of white blood cell count with CT grading in appendicitis,but there was a high correlation of body temperatureand of neutrophil counts with the CT grades of appendicitisfor patients with atypical appendicitis. The CT grades ofappendicitis also correlated with the pathology.
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