일 권역응급의료센터 내원 환자의 체류시간 및 관련 요인

천숙진(Cheon, Suk-jin),이병숙(Lee, Byoungsook) 계명대학교 간호과학연구소 2012 계명간호과학 Vol.16 No.2

Purpose: This study was conducted to analyze the length of stay and related factors of patients admitted in regional emergency medical center. Method: The subjects included were 162 patients who visited the regional emergency medical center in a metropolitan city. The length of stay from reception to the physician's response, decision for admission, length of stay in the emergency medical center were measured and analyzed. Results: The average length of stay from reception to the physician's response was 49.00 minutes, decision for admission was 884.29 minutes, and the average length of stay was 1056.62minutes. According to patients' levels of severity and the types of admission and discharge, the length of stay from physician's response, from decision for admission, and total length of stay were significantly different. Logistic regression showed the length of stay for physician's response, stay for decision of admission were the significant predictors for the delayed stay. As the stay for the physician response were delayed one minute, the possibility of the delayed stay in the emergency medical center is 1.36 times higher. As the stay for decision of admission is delayed one minute, the possibility of the delayed stay in the emergency medical center is 1.16 times higher. The most . frequent reason for the delayed stay was the shortage of hospital rooms (11.8%). Conclusion: The results showed the length of stay from the physician's response, from the decision for admission and total length of stay in a regional emergency medical center were considerably delayed. The predictable factors for the total length of stay were the stay from the physician's response and from the decision for admission.

흰베도라치 (Pholis fangi) 자어의 사망률과 부화량 추정법

차성식 ( Seong Sig Cha ),천숙진 ( Sook Jin Chun ) 한국어류학회 2004 韓國魚類學會誌 Vol.16 No.2

2003년 새만금 해역 어류플랑크톤의 종조성과 출현량

차성식 ( Seong Sig Cha ),천숙진 ( Sook Jin Chun ),양재삼 ( Jae Sam Yang ),최강원 ( Kang Won Choi ) 한국어류학회 2004 韓國魚類學會誌 Vol.16 No.4

Estimation of Fractional Vegetation Cover in Sand Dunes Using Multi-spectral Images from Fixed-wing UAV

최석근,이승기,정성혁,최재완,최도연,천숙진 한국측량학회 2016 한국측량학회지 Vol.34 No.4

Since the use of UAV (Unmanned Aerial Vehicle) is convenient for the acquisition of data on broad or inaccessible regions, it is nowadays used to establish spatial information for various fields, such as the environment, ecosystem, forest, or for military purposes. In this study, the process of estimating FVC (Fractional Vegetation Cover), based on multi-spectral UAV, to overcome the limitations of conventional methods is suggested. Hence, we propose that the FVC map is generated by using multi-spectral imaging. First, two types of result classifications were obtained based on RF (Random Forest) using RGB images and NDVI (Normalized Difference Vegetation Index) with RGB images. Then, the result map was reclassified into vegetation and nonvegetation. Finally, an FVC map-based RF were generated by using pixel calculation and FVC map-based GI (Gutman and Ignatov) model were indirectly made by fixed parameters. The method of adding NDVI shows a relatively h igher a ccuracy compared t o t hat of a dding only RGB, a nd i n particular, t he GI model shows a lower RMSE (Root Mean Square Error) with 0.182 than RF. In this regard, the availability of the GI model which uses only the values of NDVI is higher than that of RF whose accuracy varies according to the results of classification. Our results showed that the GI mode ensures the quality of the FVC if the NDVI maintained at a uniform level. This can be easily achieved by using a UAV, which can provide vegetation data to improve the estimation of FVC.

UAV-based Land Cover Mapping Technique for Monitoring Coastal Sand Dunes

최석근,김구혁,최재완,이승기,최도연,정성혁,천숙진 한국측량학회 2017 한국측량학회지 Vol.35 No.1

In recent years, coastal dune erosion has accelerated as various structures have been developed around the coastal dunes. A land cover map should be developed to identify the characteristics of sand dunes and to monitor the condition of sand dunes. The Korean Ministry of Environment’s land cover maps suffer from problems, such as limited classes, target areas, and durations. Thus, this study conducted experiments using RGB and multispectral images based on UAV (Unmanned Aerial Vehicle) over an approximately one-year cycle to create a land cover map of coastal dunes. RF (Random Forest) classifier was used for the analysis in accordance with the experimental region’s characteristics. The pixel- and object-based classification results obtained by using RGB and multispectral cameras were evaluated, respectively. The study results showed that object-based classification using multispectral images had the highest accuracy. Our results suggest that constant monitoring of coastal dunes can be performed effectively.

붉은귀거북 (Trachemys scripta elegans)과 리버쿠터 (Pseudemys concinna), 국내종 남생이 (Mauremys reevesii) 간 알의 외형적 특징 비교

천승주,함충호,박승민,배주희,이주희,조성익,천숙진,성하철 한국환경생물학회 2023 환경생물 : 환경생물학회지 Vol.41 No.2

The main factor of biodiversity decline in major biological populations around the world is invasion of alien species. To protect native species, it is necessary to manage alien species. Recently, to eradicate ecosystem disturbance caused by alien species in Korea, many efforts have been made to capture individuals using nets and purchase captured individuals. However, there is no standard for classifying species due to the form of nest site or external characteristics of eggs of freshwater turtles. Thus, Mauremys reevesii eggs might be discarded due to mistaking as eggs of alien turtles. Based on more data, this study aims to compare and analyze external differences among eggs of Trachemys scripta elegans, Pseudemys concinna, and M. reevesii and use them as reference materials in the process of eradicating alien turtles. This study measured characteristics of eggs of the three turtle species. As a result of comparison, all variables of external characteristics of alien turtles and M. reevesii eggs showed significant differences. The shape of egg was also different, with eggs of T. scripta elegans and P. concinna showing a bicone shape and those of M. reevesii showing an ellipsoid shape. In conclusion, based on results of previous studies and the present study, eggs of M. reevesii, T. scripta elegans, and P. concinna are different in shape and structure. Thus, it is possible to distinguish between M. reevesii and invasive alien turtle using their eggs. 전 세계 주요 생물군의 생물다양성 저하의 주요 요인은 외래종의 침입이다. 국내종의 보호를 위해서 외래종의 관리가 필요한 실정이며, 최근 들어 국내에서 생태계교란 외래종의 퇴치를 위해 그물을 이용한 개체 포획, 포획된 개체들에 대한 수매 사업 등 많은 노력을 기울이고 있으며, 외래종 거북의 개체수를 줄이기 위해 산란된 알을 집중적으로 찾아서 폐기하고 있다. 그러나 현재 남생이 (Mauremys reevesii)와 생태계교란 민물거북의 산란지 형태나 알의 외형적 특징으로 종을 구분하는 기준은 제시된 바 없기에, 외래종 거북의 퇴치 과정에 외래종 거북의 알로 오인되어 폐기되는 남생이 알이 발생할 가능성을 배제할 수 없다. 따라서 본 연구에서는 보다 많은 자료들을 바탕으로 붉은귀거북 (Trachemys scripta elegans)과 리버쿠터 (Pseudemys concinna), 남생이 간 알의 외형적 차이를 비교·분석하여 외래종 거북의 현장 퇴치 과정에 참고자료로 활용하고자 한다. 본 연구는 민물거북 3종의 알 특징을 측정하였다. 비교 결과 외래 거북과 남생이 알의 외형적 특성에서 모든 변수가 유의미한 차이를 보였다. 알의 모양 또한 붉은귀거북과 리버쿠터는 마름모형 (Bicone), 남생이는 타원형 (Ellipsoid)으로 차이를 보였다. 결론적으로, 선행 연구와 본 연구의 결과를 통하여 확인된 바와 같이 남생이와 붉은귀거북, 리버쿠터의 알은 모양과 구성 모두 다르기 때문에 현장에서 민물거북의 산란지를 발견할 경우 알을 이용하여 남생이와 외래거북의 구분이 가능할 것으로 판단된다.

지상라이다를 이용한 미기록 외래종 갯쥐꼬리풀(Spartina Alterniflora)의 분포특성과 관리방안 연구 -다도해 해상국립공원 진도 남동리 해안을 사례로-

박정원 ( Jung Won Park ),김하송 ( Ha Song Kim ),장성건 ( Seong Geon Jang ),천숙진 ( Sook Jin Chun ),육관수 ( Kwan Soo Yuk ) 한국도서(섬)학회 2015 韓國島嶼硏究 Vol.27 No.3

Spartina alterniflora is native to the Atlantic coast from Newfoundland, the south of Canada and northern Argentina. There it forms a dominant part of brackish coastal saltmarshes. Due to its strong growth, the Spartina alternifolra was introduced to the rider area and coast as a use for ecological engineering. The Spartina alterniflora community can crowd out native species, reduce the biodiversity of saltmarsh and alter the environment. As a result, the invertebrates living in mud flats disappeared due to the encroaching of Spartina alterniflora, and the birds which eat off invertebrates went along as well. The Spartina alterniflora was first introduced in South Korea in 2008 and is known to have flowed in the Dadohaehaesang National Park. Compared to 2008, in 2015 the distribution area of the Spartina alterniflora has increased 550 times. (11.54㎡ in 2008 to 6,394.22㎡ in 2015). The large increase of Spartina alterniflora calls for urgent management and additionary study on the subject. Thus, this study analyzed the geo-spatial information on the Spartina alterniflora such as its distribution area, the height of habitats and expected expansion area, and can act as the preliminary data for management.