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이경용,Lee, Kyoung-yong 한국기록학회 2002 기록학연구 Vol.0 No.6
Let me conclusion the regulation of the archival management organizations and it's development From the 1894(甲午改革) First, the archival management organizations(記錄局, 總務局) had been made in the office of prime ministry(議政府) and each ministry, which had managed the records and archives in the era of 1894. Second, the archival management organizations had been changed by the beginning of cabinet system from the march of 1895. They had been divided into three parts. One(參事官室) had managed the current records Another one(記錄局) had managed the compilation. Third, from the 1896(俄館播遷) to 1904(露日戰爭), the archival management organizations had been returned to old system of the era of 1894. I mean that the records management ministry(文書課) and the one (記錄局) had been reduced to the small office each other. For more effect research, I studied from the archival aspect. So I focused the archival institution (記錄局, 記錄課) and the related regulations(各府各衛門通行規則)in the era of 甲午改革. My conclusion is they had introduced directly from the regulations(各省官制通則) of Japan. And I did find the related regulations of some agencies (內部, 度支部, 宮內府 奎章閣). From the research of these regulations, I concluded these had been introduced directly from the regulations of Japan, too.
R134a 터보냉동기용 원심압축기의 성능특성에 관한 수치해석적 연구
이경용,최영석,박운진,Lee, Kyoung-Yong,Choi, Young-Seok,Park, Woon-Jean 한국유체기계학회 2004 한국유체기계학회 논문집 Vol.19 No.4
In this study, the overall performance and the local flow field of the centrifugal compressor with the refrigerant HFC-l34a were numerically studied using CFX-TASCflow. The thermodynamic and transport properties of the refrigerant gas were modeled by REFPROP which is NIST refrigerant properties database. The impacts of a grid qualify, discretization scheme, turbulent model and interaction between a impeller and a cascade diffuser were analyzed comparatively. The results were compared with experimental data and 1-D design results using COMPAL and agreed well with others. The numerical method and data obtained in this study can be applied to the design and modification of centrifugal compressors with real gases
전력케이블에서 반도전 재료의 이온성 불순물에 따른 열적 특성
이경용,최용성,박대희,Lee, Kyoung-Yong,Choi, Yong-Sung,Park, Dae-Hee 한국전기전자재료학회 2004 전기전자재료학회논문지 Vol.17 No.12
In this paper, we have investigated thermal properties and Impurities content of specimens showing by changing the content of carbon black that is semiconductive materials for underground power transmission. Specimens were made of sheet form with the three of existing resins and the nine of specimens for measurement. Impurities content of specimens was measured by ICPAES(Inductively Coupled Plasma Atomic Emission Spectrometer). Heat capacity(ΔH) and melting temperature(Tm) were measured by DSC(Differential Scanning Calorimetry). The ranges of measurement temperature were from $0^{\circ}C$ to 20$0^{\circ}C$, and heating temperature was 4$^{\circ}C$/min. And then thermal diffusivity was measured by LFA 447. The measurement temperature was $25^{\circ}C$. Impurities content was highly measured according to increasing the content of carbon black from ICPAES results. And heat capacity and melting temperature from the DSC results were simultaneously decreased according to increasing the content of carbon black, while thermal diffusivity was increased according to increasing the content of carbon black. Because ionic impurities of carbon black containg Fe, Co, Mn, Al, and Zn were rapidly increasing kinetic energy by vibration of ionic impurities through the applied heat energy.
정상 안저 소견을 보이는 제2형 당뇨 환자에서 대비감도 변화와 내측 망막두께 분석
이경용(Kyoung Yong Lee),신승주(Seong Joo Shin),문지선(Ji Sun Moon) 대한안과학회 2021 대한안과학회지 Vol.62 No.5
목적: 정상 안저 소견을 보이는 제2형 당뇨 환자와 정상인의 대비감도를 비교하고 당뇨 환자의 내측 망막두께를 분석하여 대비감도 변화에 영향을 미치는 인자를 분석하고자 하였다. 대상과 방법: 정상 안저 소견의 당뇨 환자 75안과 정상인 41안을 대상으로 암소시와 명소시 조건하에서 6.3°, 4.0°, 2.5°, 1.6°, 1.0°, 0.64°의 시각(degree)을 가진 시표에 대해 대비감도 역치를 측정하였고, 당뇨 환자에서는 빛간섭단층촬영을 이용하여 전체 망막두께, 망막신경섬유층(retinal nerve fiber layer, RNFL) 및 신경절세포-내망상층(ganglion cell-inner plexiform layer, GC-IPL)의 두께를 측정하였다. 결과: 당뇨 환자군은 대조군에 비해 암소시 및 명소시의 모든 시각에서 대비감도 역치가 감소되었다. 당뇨 환자 중 대비감도 역치가 감소된 군은 감소되지 않은 군에 비해 유병 기간이 길었고, 전체 망막두께와 평균 GC-IPL 두께, 상측 RNFL과 상측 및 이측 GC-IPL 두께가 얇았다. 대비감도 저하의 위험인자는 당뇨 유병 기간과 전체 망막두께로 나타났다(각각 odds ratio=1.117, 0.942). 결론: 제2형 당뇨 환자에서 당뇨의 유병 기간이 길어질수록 대비감도가 감소되며, 신경망막의 변성은 내측 망막 및 전체 망막두께 변화를 야기하고 대비감도 변화에 영향을 미칠 수 있는 것으로 사료된다. 따라서 유병 기간이 긴 당뇨 환자에서는 정상 안저 소견을 보인다 하여도 대비감도 변화와 빛간섭단층촬영상 망막두께의 변화에 유념할 필요가 있다. Purpose: To compare the contrast sensitivities of type 2 diabetic patients without retinopathy and healthy subjects, and to assess the risk factors associated with a change in contrast sensitivity in diabetes. Methods: A total of 75 (diabetic patients without retinopathy) and 41 (healthy subjects) eyes were reviewed from the medical records. The threshold of contrast sensitivity was measured at 6.3°, 4.0°, 2.5°, 1.6°, 1.0°, and 0.64° under scotopic and photopic states. Optical coherence tomography (OCT) imaging was used to measure the retinal nerve fiber layer (RNFL) thickness and ganglion cell-inner plexiform layer (GC-IPL) thickness in diabetic patients. Results: Diabetic patients showed a lower threshold of contrast sensitivity at all degree measures than did the controls under both scotopic and photopic states. In subgroup analyses, diabetic patients with abnormal contrast sensitivity showed a longer duration of diabetes, decreased total retinal thickness, and decreased average GC-IPL, superior RNFL, superior GC-IPL, and temporal GC-IPL thicknesses. Multivariate logistic regression analyses showed that the duration of diabetes and total retinal thickness were significant predictive factors of decreased contrast sensitivity (odds ratio = 1.117 and 0.942, respectively). Conclusions: As the duration of diabetes increased, the contrast sensitivity decreased in type 2 diabetic patients. Neuroretinal degeneration changes both the inner retinal thickness and total retinal thickness and affects contrast sensitivity. Therefore, for longer-term diabetic patients, it is necessary to consider the changes in contrast sensitivity and retinal thickness on OCT evaluation, even if the patient presents with normal fundus findings.
XLPE 절연층과 반도전층 재료의 비열 및 열전도 측정
李慶龍(Kyoung-Yong Lee),梁鍾錫(Jong-Seok Yang),崔龍成(Yong-Sung Choi),朴大熙(Dae-Hee Park) 대한전기학회 2006 전기학회논문지C Vol.55 No.1
To improve mean-life and reliability of power cable, we have investigated specific heat (Cp) and thermal conductivity of XLPE insulator and semiconducting materials in 154[㎸] underground power transmission cable. Specimens were respectively made of sheet form with EVA, EEA and EBA added 30[wt%], carbon black, and the other was made of sheet form by cutting XLPE insulator in 154[㎸] power cable. Specific heat (Cp) and thermal conductivity were measured by DSC (Differential Scanning Calorimetry) and Nano Flash Diffusivity. Specific-heat measurement temperature ranges of XLPE insulator were from 20[℃] to 90[℃], and the heating rate was 1[℃/min]. And the measurement temperatures of thermal conductivity were 25[℃], 55[℃] and 90[℃]. In case of semiconducting materials, the measurement temperature ranges of specific heat were from 20[℃] to 60[℃], and the heating rate was 1[℃/min]. And the measurement temperatures of thermal conductivity were 25[℃] and 55[℃]. In addition we measured matrix of semiconducting materials to show formation and growth of carbon black in base resins through the SEM. From these experimental results, both specific heat and thermal conductivity were increased by heating rate because volume of materials was expanded according to rise in temperature.
증례 : 순환기 ; 심실중격결손에 의해 과다 폐색전증의 증상이 발현되지 않은 1예
이경용 ( Kyoung Yong Lee ),정우조 ( Woo Cho Chung ),김경중 ( Kyung Joong Kim ),두영재 ( Young Jae Doo ),최지욱 ( Jiwook Choi ),윤영섭 ( Yeong Seop Yun ),이재범 ( Jae Beom Lee ) 대한내과학회 2015 대한내과학회지 Vol.89 No.1
과다 폐색전증, 심실중격결손과다 폐색전증(massive pulmonary thromboembolism)은 빠른 치료가 사망률을 낮출 수 있기 때문에 폐색전증 중에서도 초기에 진단하는 것이 중요하다. 그러나 환자의 여러 요인으로 인해 폐색전증은 다른 양상의 혈역학적 효과를 보일 수있으므로 초기 진단이 어려울 수 있으며, 이는 사망률을 높이게 될 수 있다. 저자 등은 72세 여자 환자에서 2개월 전부터 서서히 악화된 호흡곤란을 급성 관동맥 증후군으로 생각하여 검사를 진행하였으나, 결과적으로는 흉부 전산화 단층 촬영을 통해 과다 폐색전증을 진단하였다. 폐색전증 환자에서 일반적 병태생리와 다른 경우에는 심실중격결손의 합병유무에 대해서도 염두에 둘 필요가 있을 것으로 보인다. 저자 등은 72세 여자 환자에서 심실중격결손에 의해 숨겨졌던과다 폐색전증의 증례를 경험하였기에 문헌 고찰과 함께 보고하는 바이다. Patients with massive pulmonary embolism may present with severe dyspnea at rest, syncope, or cardiac arrest. Early diagnosis and treatment are essential to reduce mortality; however, patient-specific factors can influence the hemodynamic effect of pulmonary embolism. Here, we present a case of massive pulmonary embolism masked by a ventricular septal defect in a 73-year-old female. (Korean J Med 2015;89:85-90)