다시점 비디오의 색상 성분 보정을 위한 특징점 기반의 전처리 방법

박성희,유지상,Park, Sung-Hee,Yoo, Ji-Sang 한국정보통신학회 2011 한국정보통신학회논문지 Vol.15 No.12

본 논문에서는 특징점 기반 색상 보정을 통한 다시점 비디오 부호화 전처리 방법을 제안 한다. 다시점 영상은 조명 및 카메라 간의 특성차이로 인해 인접 시점 간 색상차를 갖게 된다. 이를 보정하기 위한 여러 가지 방법 중, 본 논문에서는 영상 간의 대응되는 특징점들을 기반으로 상대적인 카메라의 특성을 모델링하고 이를 통해 색상을 보정하는 방법을 제안한다. 대응되는 특징점을 추출하기 위해 Harris 코너 검출법을 사용하고, 모델링 된 수식의 계수는 가우스-뉴튼 순환 기법(Gauss-Newton circulation algorithm)으로 추정한다. 또한 참조 영상을 기준으로 보정해야할 타겟 영상의 색상값을 RGB 성분별로 보정한다. 테스트 영상을 가지고 실험한 결과 제안한 전처리 방법으로 보정을 하였을 경우, 전처리 과정을 거치지 않았을 때보다 화질 및 압축효율이 향상됨을 알 수 있었다. 또한 누적 히스토그램 기반의 전처리 방식과 비교했을 때, PSNR은 성분별로 0.5 dB ~ 0.8dB 정도 개선되고 bit rate 는 14% 정도 감소되는 성능을 확인하였다. In this paper we propose a new pre-processing algorithm applied to multi-view video coding using color compensation algorithm based on image features. Multi-view images have a difference between neighboring frames according to illumination and different camera characteristics. To compensate this color difference, first we model the characteristics of cameras based on frame's feature from each camera and then correct the color difference. To extract corresponding features from each frame, we use Harris corner detection algorithm and characteristic coefficients used in the model is estimated by using Gauss-Newton algorithm. In this algorithm, we compensate RGB components of target images, separately from the reference image. The experimental results with many test images show that the proposed algorithm peformed better than the histogram based algorithm as much as 14 % of bit reduction and 0.5 dB ~ 0.8dB of PSNR enhancement.

SVM 모델을 이용한 3차원 패치 기반 단백질 상호작용 사이트 예측기법

박성희,Park, Sung-Hee,Hansen, Bjorn 한국정보처리학회 2012 정보처리학회논문지D Vol.19 No.1

모노머 단백질의 상호작용 사이트 예측은 기능을 알지 못하는 단백질에 대해서 이것과 상호작용하는 단백질로부터 기능을 예측하거나 단백질 도킹을 위한 검색 공간의 감소에 중요한 역할을 한다. 그러나 상호작용사이트 예측은 대부분 단백질 상호작용이 세포 내에서 순간적 반응에 일어나는 약한 상호작용으로 실험에 의한 3차원 결정 구조 식별의 어려움이 따르며 이로 인해 3차원의 복합체 데이터가 제한적으로 양산된다. 이 논문에서는 모노머 단백질의 3차원 패치 계산을 통하여 구조가 알려진 복합체의 상호작용사이트와 비상호작용사이트에 대한 패치 속성을 추출하고 이를 기반으로 Support Vector Machine (SVM) 분류기법을 이용한 예측 모델 개발을 제시한다. 타겟 클래스의 데이터 불균형 문제 해결을 위해 under-sampling 기법을 이용한다. 사용된 패치속성은 2차 구조 요소와 아미노산 구성으로부터 총 9개가 추출된다. 147개의 단백질 복합체에 대해서 10 fold cross validation을 통해서 다양한 분류모델의 성능 평가를 하였다. 평가한 분류 모델 중 SVM은 92.7%의 높은 정확성을 보이고 이를 이용하여 분류 모델을 개발하였다. Predication of protein interaction sites for monomer structures can reduce the search space for protein docking and has been regarded as very significant for predicting unknown functions of proteins from their interacting proteins whose functions are known. In the other hand, the prediction of interaction sites has been limited in crystallizing weakly interacting complexes which are transient and do not form the complexes stable enough for obtaining experimental structures by crystallization or even NMR for the most important protein-protein interactions. This work reports the calculation of 3D surface patches of complex structures and their properties and a machine learning approach to build a predictive model for the 3D surface patches in interaction and non-interaction sites using support vector machine. To overcome classification problems for class imbalanced data, we employed an under-sampling technique. 9 properties of the patches were calculated from amino acid compositions and secondary structure elements. With 10 fold cross validation, the predictive model built from SVM achieved an accuracy of 92.7% for classification of 3D patches in interaction and non-interaction sites from 147 complexes.

두 음악가 이야기

박성희,Park, Seong-Hui 대한석유협회 1992 석유와 에너지 Vol.1992 No.6

환자안전 전담인력의 업무 지원을 위한 보조인력 도입에 관한 연구

박성희,곽미정,김철규,이상일,이순교,최윤경,황정해,Park, Seong-Hi,Kwak, Mi-Jeong,Kim, Chul-Gyu,Lee, Sang-il,Lee, Sun-Gyo,Cho, Yun-Kyoung,Hwang, Jeong-Hae 한국의료질향상학회 2020 한국의료질향상학회지 Vol.26 No.1

Purpose: The purpose of this study was to, present basic data on the necessity of introducing assistant staff to support administrative tasks related to patient safety. Methods: This was a cross-sectional study. The participants (n=103) of this study were nurses, working at general and long-term care hospitals in Korea. Data were collected using structured questionnaires on August 29, 2019 and analyzed with SPSS 25.0. Specifically, data analysis was conducted using frequencies, mean and standard deviation, independent t-test, and X²-test. Results: Assistant staff was needed to support patient safety tasks, but this required nurses who could fully perform patient safety tasks by supplementing their work experience rather than employees who only support administrative tasks. This is because the hospital's patient safety management activities are difficult to distinguish between administrative tasks and patient safety tasks, and even nurses with five years of work experience, must be aware of the basic concepts and should have knowledge of patient safety and have gained experience in managing the patient safety activities. Conclusion: Hospitals are calling for an improvement in the system that increases the number of workers in charge of patient safety affairs and lowers their work experience, rather than the introduction of assistant staff who help with patient safety work.

의료의 질 개선 전문가의 자격 시스템에 대한 현황

박성희,황정해,최윤경,이순교,Park, Seong-Hi,Hwang, Jeong-Hae,Choi, Yun-Kyoung,Lee, Sun-Gyo 한국의료질향상학회 2013 한국의료질향상학회지 Vol.19 No.2

Objectives: The purpose of this study is to provide comprehensive information of qualification systems of developed countries needed to establish our national system for QI(Quality improvement) specialists. Methods: All articles related to any applicable domestic or foreign countries' laws, operational status, and detailed programs for professional qualification system of QI were reviewed. Result: In the United States, a non-profit organization, Healthcare Quality Certification Commission (HQCC) has set the policies, procedures and standards in the field of health care quality. And qualification system of CPHQ (certified professional in healthcare quality) has been operated in order to authenticate the qualifications in the field of quality management. IBQH(international Board for quality in healthcare), a qualification system of experts in the United Kingdom, was designed to assist the qualification of professionals to improve the quality of healthcare. In addition, Health Research Center of Feinberg School of Medicine in Northwestern University has been operating Master's and doctoral degree programs in the field of the quality of care and patient safety and IHI (institute for healthcare improvement) open school was operating a professional training course related to the quality of care and patient safety. Conclusion: Quantity and complexity of information of the quality of care and patient safety have been increased. For reform of the health care system, a special training course of the expertise and leadership are needed. So far, there is no national professional certification courses in our nation. Therefore essential job skill should be acquired individually. For systematic and effective quality improvement activities, the educational and certification system with professional development model are needed.

A Study on Carrier Injection and Trapping by the High Field for MOS(Metal-$Al_2O_3$-p Si$) Structure

박성희,성만영,Park, Sung Hee,Sung, Man Young The Institute of Electronics and Information Engin 1987 전자공학회논문지 Vol.24 No.1

This study is carrier out to investigate the carrier injection and the characteristics of trapping for the CVD deposited Al2O3 film on Si substrates. Samples used are metal -Al2O3-Si Structure in which metal field plates are used with Aluminium or God. Canier injection and trapping, which result in flat band voltalge shift, occur at fields as low as 1~2 MV/cm. An approximate method is proposed for computing the location of the centroid of the trapped electrons in this paper. Results show that carriers are trapped near the injecting interface at fields less than about 5MV/cm. Because of continued charging, a steady state can not be reached. Therefore the unique I-V curve is obtained when the traps are initially empty. By utilization of applied voltage on each point of the fresh device sample, it is measured the I-V surves for two polarities of applied voltage. The current densities observed in the Al2O3 films are much larger than those obtained in SiO2.

일 병원의 외래진료대기시간 지연요인 분석

박성희,Park, Seong-Hi 한국의료질향상학회 2001 한국의료질향상학회지 Vol.8 No.2

Background : To shorten processing time for variety of medical affairs of the patient at the outpatient clinic of a big hospital is very important to qualify medical care of the patient. Therefore, patient's waiting time for medical examination is often utilized as a strong tool to evaluate patient satisfaction with a medical care provided. We performed this study to investigate factors delaying related with waiting time for medical examination. Methods : The data were collected from June 26 to July 30, 1999. A total 275 case of medical treatment and 5,634 patients who visited outpatient clinics of a tertiary hospital were subjected to evaluate the waiting time. The data were analyzed using frequency, t-test, ANOVA, $X^2$-test by SPSS Windows 7.5 program. Results : The mean patient's waiting time objectively evaluated ($30.9{\pm}33.9$ min) was longer than that subjectively by patient evaluated ($25.1{\pm}26.2$ min). Patient waiting time objectively evaluated was influenced by the starting time of medical examination, consultation hours, patients arriving time etc, as expected. The time discrepancy between two evaluations was influenced by several causative factors. Regarding the degree of patients accepted waiting time with the medical examination is 20 min. Conclusion : The results show that, besides the starting time of medical examination, consultation hours and patients arriving time, influence the patient's subjective evaluation of waiting time for medical examination and his satisfaction related with the service in the big hospital. In order to improve patient satisfaction related with waiting time for medical examination, it will be effective examination rather than to shorten the real processing time within the consultation room.

유가인하 - 연탄보일러에서 기름난방으로 바꾸고

박성희,Park, Seong-Hui 대한석유협회 1988 석유와 에너지 Vol.1988 No.11

화학요법을 받고 있는 암환아의 구토 및 식이양상

박성희,Park Sung Hee 한국아동간호학회 1997 Child Health Nursing Research Vol.3 No.1

The incidence of chemothrapy related among pediatric cancer patient was 90.1%. Adequate oral intake and nutrition have been shown to be important. These consideration prompted the decision to survey by means of a questionaire. The questionaire were included nausea-vomiting peak time, causing factor, coping method, education need, diet pattern change and food preference. Results are fellow 1. Almost(90.1%) pediatric cancer patient experienced nausea-vomiting during chemotherapy and required coping method or reducing method. 2 . The food preference form were Identified. Those were fluid form, cold and small amout and frequentry eating form. The patients preferred noodles, chickens, soap, juice. The results of the survey indicate that nasea-vomiting relief nursing intervention are required pediatric cancer patient received chemotherapy. Health care personnels recognize the pediatric cancer patient's diet pattern and encourage the nutritional counselling. The care of patient should be multidisciplinary team approach and the nurse occupies a key position with in this team, which includes the pediatrician, nutrionist.

Busduct의 특징 및 개발 동향

박성희,Park, Seong-Hui 한국전기전자재료학회 2010 전기전자재료 Vol.23 No.7