[지역기획보도 부문_제173회 이달의 방송기자상] 아무도 주목하지 않은 병을 조명하다 : 〈기획보도 ‘욕창이 온다’〉 2023년 2월 20일~23일 보도 KBS대구 류재현, 최동희, 박가영 기자

류재현 (사)방송기자연합회 2023 방송기자 Vol.72 No.-

[지역기획보도 부문]〈비상 재정 대구시, 안 쓴 예산만 수천억 원〉_2024년 1월 22일~24일 보도 KBS대구 류재현, 김석현 기자 : 데이터와 사례로 살펴본 ‘대구시 비효율적 예산 집행’

류재현 (사)방송기자연합회 2024 방송기자 Vol.77 No.-

코로나19 관련 장기요양 분야 사회반응 분석

류재현,이정석,이희승 한국노년학회 2021 한국노년학회 학술발표논문집 Vol.2021 No.1

Effect of Hydro-meteorological and Surface Conditions on Variations in the Frequency of Asian Dust Events

류재현,홍성욱,유상진,정주용,신인철,조재일 대한원격탐사학회 2018 大韓遠隔探査學會誌 Vol.34 No.1

The effects of hydro-meteorological and surface variables on the frequency of Asian dust events (FAE) were investigated using ground station and satellite-based data. Present weather codes 7, 8, and 9 derived from surface synoptic observations (SYNOP) were used for counting FAE. Surface wind speed (SWS), air temperature (Ta), relative humidity (RH), and precipitation were analyzed as hydro-meteorological variables for FAE. The Normalized Difference Vegetation Index (NDVI), land surface temperature (LST), and snow cover fraction (SCF) were used to consider the effects of surface variables on FAE. The relationships between FAE and hydro-meteorological variables were analyzed using Z-score and empirical orthogonal function (EOF) analysis. Although all variables expressed the change of FAE, the degrees of expression were different. SWS, LST, and Ta (indices applicable when Z-score was < 0) explained about 63.01, 58.00, and 56.17% of the FAE, respectively. For NDVI, precipitation, and RH, Asian dust events occurred with a frequency of about 55.38, 67.37, and 62.87% when the Z-scores were > 0. EOF analysis for the FAE showed the seasonal cycle, change pattern, and surface influences related to dryness condition for the FAE. The intensity of SWS was the main cause for change of FAE, but surface variables such as LST, SCF, and NDVI also were expressed because wet surface conditions suppress FAE. These results demonstrate that not only SWS and precipitation, but also surface variables, are important and useful precursors for monitoring Asian dust events.

한중일 지방정부의 다자간 국제교류협력체에 관한 유형론적 비교연구 - 부산, 상하이, 후쿠오카를 중심으로

류재현 한국자치행정학회 2012 한국자치행정학보 Vol.26 No.2

지방정부의 국제교류협력은 현실적으로 활성화되지 못하고 초보단계인 형식적 회의체의 수준에 머물러있다. 특히 지방정부간 국제교류협력의 효과적 방안이 될 수 있는 다자간 국제교류협력체의 운영수준은 형식적, 상징적, 비경제적 교류협력에 그치고 있을 뿐만 아니라 다자간 국제교류협력에 관한 연구는 현재 시론 또는 담론수준에 머물고 있다. 따라서 본 연구는 한국의 부산시와 중국의 상하이시 및 일본의 후쿠오카시를 대상사례로 선정하여 그들의 다자간 국제교류협력체를 목적, 구성, 운영 측면에서의 유형론으로 비교분석하여 대상사례의 상대적 특성을 파악했을 뿐만 아니라 지방정부의 다자간 국제교류협력체가 가지고 있는 일반성을 도출하였다. 그 결과를 통해 지방정부의 다자간 국제교류협력은 경제적 관점, 국지적 경제통합, 국제화전략수립, 통합형 운영거버넌스, 공공민간거버넌스체계, 그리고 실행계획 및 사업개발 등을 지향해야 한다고 정책제언 하였다.

한중 지방정부의 국제교류협력행정에 관한 비교연구: 부산시와 상하이시를 중심으로

류재현 한국자치행정학회 2011 한국자치행정학보 Vol.25 No.2

세방화 시대를 맞이하여 지방정부는 세계사의 주체로서 적극적으로 도시외교를 활성화시켜 국제교류협력의 증대를 통해 지역발전을 이룩해야 할 과제를 안고 있음에도 불구하고 현실은 여전히 소극적 사고와 의례적 활동에 그치고 있으며, 동 분야에 관한 연구 또한 사례분석이나 실용적 연구에 의한 정책연구가 미진하다. 이러한 현실적, 이론적 동기에 의해 본 연구는 한국의 부산시와 중국의 상하이시를 대상사례로 선정하여 그들의 국제교류협력행정을 비교분석함으로써, 대상사례의 상대적 특성을 파악할 뿐만 아니라 지방정부의 국제교류협력행정이 가지고 있는 일반성을 도출하며, 그리고 그 결과를 통해 한중 지방정부간의 국제교류협력 증대방안과 함께 지방정부의 국제교류협력에 관한 정책제언을 시사하고자 하는 데에 주된 목적을 두었다. 한국 부산시와 중국 상하이시의 국제교류협력행정을, 즉 행정기구와 조직, 인사, 재정과 예산, 분장사무와 활동, 시책과 사업내용, 그리고 거버넌스체계 등을 지방정부 국제교류협력의 목적론적, 유형론적, 운영론적 관점에서 비교분석하였다. 그 결과로서 부산시 국제교류협력행정의 특성과 개선방안, 상하이시 국제교류협력행정의 특성과 개선방안, 지방정부 국제교류협력행정의 특징, 그리고 지방정부의 국제교류협력에 관한 정책제언 등을 도출하였다. This Study aims to extract the general and relative characteristics of international exchanges and cooperations administration in local governments by the comparative analysis. And to suggest the implications and alternatives of activating it. This Study not only analyzes the organization, personnel, budget, operation, policy and environment of international exchanges and cooperations administration in local governments by the case analysis on the Busan metropolitan government and Shanghai renmin government. But also analyzes the cases by the comparative analysis on the teleological, typological and operational perspective. As results, this study suggests the characteristics and improvements on the international exchanges and cooperations administration in Busan and Shanghai. And provides local governments to the policy implications and alternatives of promoting it.

H∞ Lateral Control of an Autonomous Vehicle using the RTK-DGPS

류재현,이상훈,이만형,김창섭 한국자동차공학회 2007 International journal of automotive technology Vol.8 No.5

This paper describes the development of the H∞ lateral control system for an autonomous ground vehicle operating a limited area using the RTK-DGPS (Real Time Kinematic-Differential Global Positioning System). Before engaging in autonomous driving, map data are acquired by the RTK-DGPS and used to construct a reference trajectory. The navigation system contains the map data and computes the reference yaw angle of the vehicle using two consecutive position values. The yaw angle of the vehicle is controlled by the H∞ controller. A prototype of the autonomous vehicle by the navigation method has been developed, and the performance of the vehicle has been evaluated by experiment. The experimental results show that the H∞ controller and the RTK-DGPS based navigation system can sufficiently track the map at low speed. We expect that this navigation system can be made more accurate by incorporating additional sensors.

Predictive Factors of Prostate Cancer at Repeat Biopsy in Patients with an Initial Diagnosis of Atypical Small Acinar Proliferation of the Prostate

류재현,김윤범,이정기,김윤정,정태영 대한비뇨의학회 2010 Investigative and Clinical Urology Vol.51 No.11

Purpose: The factors that predict prostate cancer detection on repeat biopsy were evaluated in patients with atypical small acinar proliferation (ASAP) on the initial biopsy. Materials and Methods: From 2003 to 2008, 3,130 men with suspected prostate cancer underwent a prostate needle biopsy, and 244 (7.8%) were diagnosed as having ASAP. One hundred seventy of 244 patients were rebiopsied at least once more. They were classified into a prostate cancer group and a noncancer group according to the final pathological diagnosis. The database of rebiopsied patients included age, initial prostate-specific antigen (PSA), PSA density (PSAD), PSA velocity (PSAV), total prostate volume (TPV), and transitional zone volume of the prostate (TZV). We compared differences in the aforementioned parameters between the 2 groups. Results: A total of 57 patients (33.5%) with ASAP were ultimately shown to have prostate cancer. Univariate analysis showed that PSAD (p=0.002), PSAV (p=0.001), TPV (p=0.035), and TZV (p=0.005) differed significantly between the cancer and noncancer groups. The results of the multivariate analysis showed that PSAD (p=0.022), PSAV (p<0.001), and TPV (p=0.037) had a statistically significant correlation with cancer detection. Conclusions: PSAD, PSAV, and TPV are predictive factors of prostate cancer in patients with an initial diagnosis of ASAP of the prostate. Although repeat biopsy is mandatory irrespective of PSA values, the follow-up of PSA may help to estimate the probability of cancer in these men. Purpose: The factors that predict prostate cancer detection on repeat biopsy were evaluated in patients with atypical small acinar proliferation (ASAP) on the initial biopsy. Materials and Methods: From 2003 to 2008, 3,130 men with suspected prostate cancer underwent a prostate needle biopsy, and 244 (7.8%) were diagnosed as having ASAP. One hundred seventy of 244 patients were rebiopsied at least once more. They were classified into a prostate cancer group and a noncancer group according to the final pathological diagnosis. The database of rebiopsied patients included age, initial prostate-specific antigen (PSA), PSA density (PSAD), PSA velocity (PSAV), total prostate volume (TPV), and transitional zone volume of the prostate (TZV). We compared differences in the aforementioned parameters between the 2 groups. Results: A total of 57 patients (33.5%) with ASAP were ultimately shown to have prostate cancer. Univariate analysis showed that PSAD (p=0.002), PSAV (p=0.001), TPV (p=0.035), and TZV (p=0.005) differed significantly between the cancer and noncancer groups. The results of the multivariate analysis showed that PSAD (p=0.022), PSAV (p<0.001), and TPV (p=0.037) had a statistically significant correlation with cancer detection. Conclusions: PSAD, PSAV, and TPV are predictive factors of prostate cancer in patients with an initial diagnosis of ASAP of the prostate. Although repeat biopsy is mandatory irrespective of PSA values, the follow-up of PSA may help to estimate the probability of cancer in these men.

Accuracy evaluation of near-surface air temperature from ERA-Interim reanalysis and satellite-based data according to elevation

류재현,한경수,박은빈 대한원격탐사학회 2013 大韓遠隔探査學會誌 Vol.29 No.6

In order to spatially interpolate the near-surface temperature (Ta) values, satellite and reanalysis methods were used from previous studies. Accuracy of reanalysis Ta was generally better than that of satellite-based Ta, but spatial resolution of reanalysis Ta was large to use at local scale studies. Our purpose is to evaluate accuracy of reanalysis Ta and satellite-based Ta according to elevation from April 2011 to March 2012 in Northeast Asia that includes various topographic features. In this study, we used reanalysis data that is ERA-Interim produced by European Centre for Medium-Range Weather Forecasts (ECMWF), and estimated satellite-based Ta using Digital Elevation Meter (DEM), Normalized Difference Vegetation Index (NDVI), difference between brightness temperature of 11μm and 12μm, and Land Surface Temperature (LST) data. The DEM data was used as auxiliary data, and observed Ta at 470 meteorological stations was used in order to evaluate accuracy. We confirmed that the accuracy of satellite-based Ta was less accurate than that of ERA-Interim Ta for total data. Results of analyzing according to elevation that was divided nine cases, ERA-Interim Ta showed higher accurate than satellite-based Ta at the low elevation (less than 500 m). However, satellite-based Ta was more accurate than ERA-Interim Ta at the higher elevation from 500 to 3500 m. Also, the width of the upper and lower quartile appeared largely from 2500 to 3500 m. It is clear from these results that ERA-Interim Ta do not consider elevation because of large spatial resolution. Therefore, satellite-based Ta was more effective than ERA-Interim Ta in the regions that is range from 500 m to 3500 m, and satellite-based Ta was recommended at a region of above 2500 m.

대장암에서 5-FU 감수성의 지표로서 현미부수체 불안정성과 Dihydropyrimidine Dehydrogenase 발현의 연관성에 대한 연구

류재현,이석환,이우인,이령아,김광호,정순섭,박응범 대한대장항문학회 2005 Annals of Coloproctolgy Vol.21 No.3