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농업용 저수지에서 Chl-a와 COD, TN, TP 간의 상관관계 분석
이새봄 ( Lee Sae-bom ),윤춘경 ( Yoon Chun-gyeong ),정광욱 ( Jung Kwang-wook ),김형철 ( Kim Hyung-chul ) 한국농공학회 2005 한국농공학회 학술대회초록집 Vol.2005 No.-
Monitoring data from agricultural reservoirs throughout the country were analyzed to evaluate the limiting factor for algal growth and correlationship between Chl-a, total phosphorus (TP), total nitrogen (TN), and chemical oxygen demand (COD). It was used for the analysis to monitored data of 394 reservoirs such as TP, TN, Chl-a, and COD from 1999 to 2003. This study analyzed water quality items in terms of areas, seasons. It turned out that phosphorus in agricultural reservoirs (about 80%) was dominant limiting factor for algal growth. Therefor, it appears that the appropriate managements of phosphorus in the agricultural watershed are crucial to prevent excessive on algal growth. Generally, there is correlation between Chl-a and TP while Chl-a do not have effect on TN. Also, Chl-a have influence on COD. This study could be used beneficially for water quality management of agricultural reservoirs and related water quality modeling.
모바일 인스턴트 메신저 이용자의 만족도, 충성도와 전환의도에 영향을 미치는 요인 연구
이새봄 ( Sae Bom Lee ),왕아금 ( Ya Qin Wang ),서영호 ( Yung Ho Suh ) 한국품질경영학회 2015 품질경영학회지 Vol.43 No.4
Purpose: The Purposes of this study are (1) to examine why users are communicating through MIM (2) to understand what factors impact these users’satisfaction and loyalty.Methods: We use a questionnaire survey to collect 256 data on users’perceptions of Kakaotalk. We also use a structural equation modeling method by using AMOS 18.0.Results: Company trust, communication voice, connectedness, and perceived network size are found to be statistically significant factors affecting. Also, satisfaction influence on word of mouth and intention to switch.Conclusion: This study develops a research model from the MIM context. We suggest three points of view as company characteristics, device interactivity, and social factor. We examine the determinants of users’satisfaction and loyalty. The results can offer valuable insights for future mobile services research.
이새봄(Sae Bom Lee),문재영(Jae Young Moon),곽준식(Jun Sik Kwak) 한국콘텐츠학회 2014 한국콘텐츠학회논문지 Vol.14 No.12
본 연구는 SNS 이용에 있어서 테크노스트레스 유발요인은 무엇이며, 테크노스트레스가 이용자들의 대응방식에 미치는 영향은 무엇인지 알아보고자 하는 실증연구이다. 전 세계적으로 스마트폰 사용의 증가에 따라 모바일 내 인터넷 이용이 다각화되면서 점차 SNS 이용자가 증가하였지만 개인 정보유출, 게시물의 과부하 등과 같은 역기능으로 SNS 이용에 따른 피로감 또는 부담감을 느끼고 있는 실정이다. 따라서 본 연구에서는 페이스북을 중심으로 SNS 소비자, 즉 이용자들의 행태가 테크노스트레스에 의해 어떻게 변화되는지 살펴보고자 하였다. 본 연구는 SNS 사용자의 테크노스트레스에 대한 초기연구로서 테크노스트레스 유발요인과 테크노스트레스를 SNS 상황에 맞게 재정립하였다는 점에서 의의가 있다. The purpose of this paper is to find technostress stressors using SNS and technostress is influencing coping based on empirical study. Increasing use of Smart phone, Internet access has diversified and SNS users have increased in the world. However many of them feel SNS fatigue or pressure from Privacy damage and information overload. This research studied behavior change of SNS’ consumers affected by the technostress on facebook. It is significant as an initial study on technostress of SNS users. Also, this paper were redefined that technostress and technostress stressors to fit the SNS situation.
이새봄 ( Lee Sae Bom ),윤춘경 ( Yoon Chun Gyeong ),정광욱 ( Jung Kwang-wook ),장재호 ( Jang Jae-ho ),한정윤 ( Han Jung-yoon ) 한국농공학회 2006 한국농공학회 학술대회초록집 Vol.2006 No.-
Monitoring data of 48 agricultural reservoirs from 1999 to 2004 was analyzed for water quality characteristics including biochemical oxygen demand (BOD5), chemical oxygen demand (COD), total nitrogen (TN), total phosphorus (TP), and chl-a. Land uses of the watersheds associated with these reservoirs were determined for residential, forest, upland, paddy and miscellaneous, and regressed against water quality characteristics. Regression analyses showed that forest land use was negatively correlated with all the water quality characteristics implying it's beneficial effects in water quality perspectives. Other land uses including residential, upland, and paddy generally illustrated positive correlation with water quality characteristics, which indicates most human activities of the watershed could degrade water quality of the receiving water bodies. Paddy land use partially contributed to the water quality degradation in contrast to the previous studies. It might be attributed to the relatively clean water quality of the study area, where even slight pollutant loading could degrade sensitively water quality. Further investigation is recommended for the effect of proximity as well as land use portions on the water quality of receiving water body.
병사용 진단서 발부 유무에 따른 젊은 남성 턱관절 장애 특징에 관한 연구
채새봄 ( Chae Sae-bom ),이연희 ( Lee Yeon-hee ),박희경 ( Park Hee-kyung ) 국군의무사령부 2017 대한군진의학학술지 Vol.48 No.1
Objectives: The purpose of this study is to examine the influence of issuing medical certificate on clinical, psychological and radiological characteristics of temporomandibular joint disorders (TMD). In some studies, the degree of TMD in patients with litigation was more than who don’t. But, there was no study to figure out the influence among Korean young male who were in the age of obligatory military age. Methods: To find out the influence or issuing medical certificate for military service on TMD, patients who visited Orofacial Pain and Oral Medicin clinic of Seoul National University Dental Hospital from September 1, 2010 to August 31, 2015, were included. They were all patients with TMD under the Korean military obligatory services age and evaluated with the TMJ X-ray, TMJ MRI, TMD diagnostic analysis charting and SCL-90R. The statistical analysis were done by logistic regression and chi square test. Results: A total 180 patients with TMD was consisted of 78 TMD patients with issuing medical certificate and 102 TMD patients without issuing. In radiographic characteristics, TMD patients who issued medical certificate showed that disc displacement was significantly higher and effusion was significantly lower. In clinical characteristics, TMD patients who issued medical certificate showed both PI and CMI were significantly higher. Conclusions: Issued medical certificate showed significant differences in radiographic and clinical characteristics.
연구논문 : 출구조사에서 무응답 메카니즘 식별 및 대체에 대한 연구: 제19대 국회의원 선거 출구조사에의 응용
전새봄 ( Sae Bom Jeon ),이수정 ( Soo Jung Lee ),박유성 ( You Sung Park ) 한국조사연구학회 2014 조사연구 Vol.15 No.3
무응답은 출구조사 예측실패의 가장 큰 원인 중 하나로, 이러한 무응답문제를 해결하기 위한 많은 연구들이 진행되었다. 대표적인 무응답 대체(imputation)방법으로, 조사기관에서 이용하는 사후층화법, 무응답 매커니즘가정에 따른 ML(maximum likelihood) 추정법, 그리고 베이지안(Bayesian) 추정법 등이 있다. 그러나 기존의 무응답 대체방법들은, 무응답 매커니즘을 판별할 수 있는 명확한 기준의 부재와 MNAR(missing not at random) 가정하에서 발생하는 변방값 문제(boundary solution)로 인해 한계가 있다. 본 논문에서는 무응답 매커니즘의 정의 및 무응답 매커니즘에 따른 변방값 문제발생의 특성을 이용하여 MAR(missing at random)과 MNAR을 판별하는 새로운 방법을 제안하고 있다. 또한 MNAR 가정하에서 발생하는 변방값 문제를 해결하기 위한 새로운 ML 추정방법을 제안하고 있다. 이를 2012년 제19대 국회의원 출구조사 자료를 이용하여 실증분석하였다. 그 결과, 본 연구방법에서 제안한 매커니즘 판정 및 추정 결과가, 기존의 여론조사기관의 예측결과 및 ML, 베이지안 방법보다 더 우수한 예측 정확도를 보였다. Non-response is one of the biggest causes of failure in the exit poll prediction, and many studies have been in progress to solve this non-response problem. Typical non-response imputation methods include post-stratification used by research institutions, ML estimation and Bayesian method according to the non-response mechanism. However, these imputation methods have limits to determine the mechanisms of non-response in the absence of clear standards, and to solve the boundary solution occurred in the MNAR assumption. In this paper, we propose a way to distinguish MNAR from MAR using the definition of the non-response mechanism as well as the characteristics of the boundary solution problems under each mechanism. In addition, we also propose a new ML method to solve the boundary solution problem under MNAR assumption. We demonstrated the empirical analysis using the exit polls of 19th member of congress in 2012. As a result, the mechanism determination proposed in this research showed better prediction compared to the poll institution, ML and Bayesian imputation.