• Nuclear Engineering and Technology
• /
• 제50권7호
• /
• pp.1006-1016
• /
• 2018

Since the early forties, researchers from around the world have been studying the phenomenon of deadtime in radiation detectors. Many have attempted to develop models to represent this phenomenon. Two highly idealized models; paralyzable and non-paralyzable are commonly used by most individuals involved in radiation measurements. Most put little thought about the operating conditions and applicability of these ideal models for their experimental conditions. So far, there is no general agreement on the applicability of any given model for a specific detector under specific operating conditions, let alone a universal model for all detectors and all operating conditions. Further the related problem of pile-up is often confused with the deadtime phenomenon. Much work, is needed to devise a generalized and practical solution to these related problems. Many methods have been developed to measure and compensate for the detector deadtime count loss, and many researchers have addressed deadtime and pulse pile-up. The goal of this article is to summarize the state of science of deadtime; measurement and compensation techniques as proposed by some of the most significant work on these topics and to review the deadtime correction models applicable to present day radiation detection systems.

• 응용통계연구
• /
• 제35권1호
• /
• pp.35-47
• /
• 2022

Receiver operating characteristic (ROC) 곡선은 이항 반응 자료에 대한 마커의 분류 예측력을 측정하기 위해 널리 적용되어왔으며 최근에는 생존 분석에서도 매우 중요한 역할을 하고 있다. 여러 가지 유형의 중도 절단과 원인 불명 등 다양한 종류의 결측 자료를 포함한 생존 자료 분석에서 마커의 사건 발생 여부에 대한 예측력을 판단하기 위해 기존의 통계량을 확장하였다. 생존 분석 자료는 각 시점에서의 사건 발생 여부로 이해할 수 있으며, 따라서 시점마다 ROC 곡선과 AUC를 구할 수 있다. 본 논문에서는 우중도 절단과 경쟁 위험 모형하에서 사용되는 다양한 방법론과 관련 R 패키지를 소개하고 각 방법의 특성을 설명하고 비교하였으며 이를 검토하기 위해 간단한 모의실험을 시행하였다. 또한, 프랑스에서 수집된 치매 자료의 마커 분석을 시행하였다.

• 디지털융복합연구
• /
• 제12권4호
• /
• pp.171-182
• /
• 2014

사회의 여러 가지 공공문제가 부각될수록 공익광고의 중요성이 증대되고 있다. 또한 각 국가의 정치, 경제, 사회, 문화의 특성에 따라 공익광고의 주제가 다르며, 독특한 공익광고 운영체제를 갖추게 되었다. 본 연구는 한국과 중국의 정치, 사회, 문화 등의 차이로 인해 공익광고의 운영체제가 다를 것이라는 가정을 하게 되었다. 따라서 한국과 중국의 공익광고 운영 주체인 KOBACO와 CCTV에서 이루어지고 있는 공익광고 운영체제를 3가지 범주(공익광고 운영현황과 공익광고의 주제 및 공익광고 관리감독)로 구분하여 비교하였다. 문헌분석과 전문가 심층면접을 통해 자료를 수집하고 분석하였다. 이 자료에 근거하여 5가지 공익광고 발전정책을 제안하였다. 본 연구결과는 향후 한국과 중국의 공익광고 제작전략과 제도적 발전에 기여할 것이다.

• 한국의료질향상학회지
• /
• 제7권1호
• /
• pp.90-104
• /
• 2000

Background : This study was designed to assess the effects of information on the satisfaction of parents and families whose children underwent elective surgery in the Pediatric Operating Room. Methods : We measured parent and family satisfaction with information given before and after offering informational interventions. The data were collected from 510 patients parents and families whose children had undergone elective surgery in the Pediatric Operating Room of Seoul National University Hospital in Seoul. South Korea. The data collection ran from May 3. 1999 to May 30. 1999 and from September 6, 1999 to September 30, 1999. The research instrument consisted of four categories (pre-operative period, intra-operative period, post-operative period, others) and 24 questionnaires. SPSS was used to analyze the data. Results : The major findings of this study are summarized as follows: 1. Before surgery, the satisfaction with the following was increased: the explanations of the necessary preparation for the surgery (6.0%), the time the patient would enter the operating room (20.6%), the operative procedure (2.0%), and the use of the waiting room (10.0%). 2. During the operation, the satisfaction with the situation board (15.1%), public announcements in the waiting room (8.4%), and the answering of the families questions (12.2%) was increased. however, the satisfaction with the surgeons explanations of the surgical outcomes decreased by 8.3%, even though the frequency of these explanations increased by 5%. 3. After surgery, the satisfaction with the following was increased: the explanations of patient's status of recovery(10.3%) the time the patient would be moved from the recovery room (17.6%), how the patient would be transferred to the ward (19.2%), and post-operative care (6.3%). Conclusion : Based upon the above findings, we concluded that pre-, intra-, and post-operative informational interventions were effective in increasing the satisfaction of the parents and families of children undergoing elective surgery.

• 디지털융복합연구
• /
• 제16권6호
• /
• pp.271-281
• /
• 2018

본 연구는 수술실 간호사의 환자안전역량과 팀워크의 인식이 환자안전관리활동에서 미치는 영향을 규명하고자 시도되었다. 연구대상자는 종합병원 수술실에서 6개월 이상 임상경력을 가진 간호사 110명이다. 자가보고 설문지를 이용하여 자료를 수집하였으며, 분석방법은 SPSS 21.0을 이용하여 기술통계, 평균비교분석, 상관분석, 단계적 회귀분석을 이용하였다. 연령이 높은 군과 교육수준이 높은 군이 유의하게 환자안전역량점수가 높았다. 환자안전역량과 환자안전관리활동은 유의한 양의 상관(r=.37)을 보였고, 팀워크와 환자안전관리활동도 유의한 양의 상관(r=.21)을 나타냈다. 회귀분석결과 환자안전관리 활동에 유의한 영향을 미치는 변수는 환자안전역량과 팀워크 인식이었고, 이들 변수의 설명력은 15.7%로 나타났다. 따라서 수술실 간호사의 환자안전관리활동을 향상을 위해 환자안전역량과 팀워크 향상을 위한 노력이 필요하며, 추가적으로 환자안전관리활동에 영향을 미치는 다른 변수에 대한 연구가 필요하다.

• 해양환경안전학회지
• /
• 제20권4호
• /
• pp.398-404
• /
• 2014

우리나라 주요 항만에 규정되어 있는 정박지와 관련한 운영 세칙은 항만마다 정박지 운영 기준이나 정박지 선박수용능력에 대한 단위가 단일화 되어있지 않으며, 동일한 사안에 대해 다른 용어들을 사용하고 있다. 이로 인해 정박지를 운영하거나 이용하고자 하는 당사자들에게 큰 혼란을 주고 있는 상황이다. 본 연구에서는 국내 주요 항만의 정박지 운영 세칙을 검토하여 세칙명, 단위 및 용어의 단일화 방안을 제안하였다. 아울러 정박지 운영상의 혼란을 최소화하기 위하여 외국 주요 항만의 정박지 현황 검토를 통하여 향후 세칙 개정시 정박지 명칭 부여 원칙, 정박지 선박수용능력 단위 및 정박지의 수용가능한 선박 척수의 설정이 이루어지도록 제안하였다.

• 식품과학과 산업
• /
• 제53권3호
• /
• pp.307-315
• /
• 2020

식품산업과 국내외 환경변화 등에 따라 식품 R&D 추진체계에 대한 변화가 필요한 시점에서 유망 식품산업 육성을 위한 미래지향적 식품 R&D 추진 및 식품산업정책과 연계한 R&D 추진전략을 제안하였다. 국내외 식품산업 동향 및 글로벌 트렌드 분석에 기초하여 미래지향적인 식품산업 성장을 위한 연구개발 분야의 전략적 대응방안을 정리하고, 식품산업 R&D 현황과 개선점을 검토하여 향후 식품산업 R&D 추진방향을 설정하였다. 식품산업 R&D 추진체계를 고도화하기 위해 구체적으로 효율적인 R&D 사업추진을 위한 연구기획체계 강화, 연구수행 주체간의 역할 분담 및 협업 강화, 미래 기술기반 확보, 현안문제 해결 및 산업현장 맞춤형 지원체계 강화, 정책사업 연계 및 식품 R&D 관리시스템 효율화 방안을 제시하였다.

• Asia pacific journal of information systems
• /
• 제34권1호
• /
• pp.150-190
• /
• 2024

This article proposes a framework to elucidate the structural dynamics of the generative AI ecosystem. It also outlines the practical application of this proposed framework through illustrative policies, with a specific emphasis on the development of the Korean generative AI ecosystem and its implications of platform strategies at AI platform-squared. We propose a comprehensive classification scheme within generative AI ecosystems, including app builders, technology partners, app stores, foundational AI models operating as operating systems, cloud services, and chip manufacturers. The market competitiveness for both app builders and technology partners will be highly contingent on their ability to effectively navigate the customer decision journey (CDJ) while offering localized services that fill the gaps left by foundational models. The strategically important platform of platforms in the generative AI ecosystem (i.e., AI platform-squared) is constituted by app stores, foundational AIs as operating systems, and cloud services. A few companies, primarily in the U.S. and China, are projected to dominate this AI platform squared, and consequently, they are likely to become the primary targets of non-market strategies by diverse governments and communities. Korea still has chances in AI platform-squared, but the window of opportunities is narrowing. A cautious approach is necessary when considering potential regulations for domestic large AI models and platforms. Hastily importing foreign regulatory frameworks and non-market strategies, such as those from Europe, could overlook the essential hierarchical structure that our framework underscores. Our study suggests a clear strategic pathway for Korea to emerge as a generative AI powerhouse. As one of the few countries boasting significant companies within the foundational AI models (which need to collaborate with each other) and chip manufacturing sectors, it is vital for Korea to leverage its unique position and strategically penetrate the platform-squared segment-app stores, operating systems, and cloud services. Given the potential network effects and winner-takes-all dynamics in AI platform-squared, this endeavor is of immediate urgency. To facilitate this transition, it is recommended that the government implement promotional policies that strategically nurture these AI platform-squared, rather than restrict them through regulations and stakeholder pressures.

• Asian Pacific Journal of Cancer Prevention
• /
• 제13권2호
• /
• pp.437-441
• /
• 2012

Objective: Health risk appraisal is often utilized to modify individual's health behavior, especially concerning disease prevention, and web-based health risk appraisal services are being provided to the general public in Korea. However, little is known about the psychological effect of the health risk appraisal even though poorly communicated information by the web-based service may result in unintended adverse health outcomes. This study was conducted to explore the psychological effect of health risk appraisal using epidemiological risk factor profile. Methods: We conducted a randomized trial comparing risk factor list type health risk appraisal and risk score type health risk appraisal. We studied 60 women aged 30 years and older who had no cancer. Anxiety level was assessed using the Spielberger State-Trait Anxiety Inventory YZ. Results: The results of multivariate analysis showed that risk status was the independent predictors of increase of state anxiety after health risk appraisal intervention when age, education, health risk appraisal type, numeracy, state anxiety, trait anxiety, and health risk appraisal type by risk status interaction was adjusted. Women who had higher risk status had an odd of having increased anxiety that was about 5 times greater than women who had lower risk status. Conclusions: Our findings indicate that communicating the risk status by individual health risk appraisal service can induce psychological sequelae, especially in women having higher risk status. Hospitals, institutes, or medical schools that are operating or planning to operate the online health risk appraisal service should take side effects such as psychological sequelae into consideration.

• 지역사회간호학회지
• /
• 제1권1호
• /
• pp.582-594
• /
• 1989

The purpose of this study is to analyze the factors affecting the school health teachers' self-confidence. This study was conducted with 87 school health teachers working in Jeonbuk province, from September to December, 1986, The results are follows; 1. Demographic characteristics of school health teachers 1) Age mean ; 34, range; 23-54 2) School Nursing experience mean; 11 years, range; 0-24 3) Clinical experience mean; 1.5 years, range: 0-13 2. Status of school health resources & nursing activities 1) Personnel resource school health teacher: pupils : 1 : 1,436 'classes=1:31 'general teacher=1:39 2) Budget Total school operating budget: School health budget : 100 : 4.2 (52.2 thousand Won) Half of the school health budget expend on medicine. 3) Clinic 80% of all schools have health clinic seperately. 71.32 of all schools have less than $35m^2$, 23.9%, $36-66m^2$. 4) Only 20% of all schools have organization for health 5) Average of clinic visitor for 1 year; 2,084 Major problem is on digestive system. And other problem: respiratory, skin, musculo - skeletal system, dental problem, etc... 6) Literal message for 1 year; 12 times. For health education (4), vaccination (3), examination of parasites (2), etc... 3. The degrees of the school health teachers' self-confidence 1) Program planning & evaluation; 2.9. 2) Clinic management; 2.8 3) Health education; 2.8 4) Management of school environment; 2.7 5) Health care services; 2.5. 6) Operating of school health organization; 2.3 4. Significances to self-confidence on school health nursing activities 1) Program planning & evaluation: home message (r=.228, p<.05) No. of clinic visitor (r=.220, p<.05) expending time for clinic management (r=.229, p<.05) religion (t: 2.5, p<.05) level of school (F=6.3, p<.005) 2) Clinic management: age of school health teacher (r=-.202, p<.05) school health experience (r=-.211, p<.05) salary step (r=.187, p<.05) expending time for clinic management (r=.315, p<0.1) marital status (t=3.97, p<.005) level of school (F=3,139, p<0.5) 3) Management of school environment: level of school (F=3.899, p<.05) expending time for clinic management (r=-,216, p<0.5) 4) Health care service: age of school health teacher (r=-.186, p<.05) marital status (t= 3.67, pH.005) 5) Health education: expending times for clinic management (r=-.252, p<05) level of school (F=5.343, p<.01) 6) Operating of health organization; age of school health teacher (r=-.258, p<.01)salary step (r=.188, p<.05) Based on the above results, the suggestions are as follows; 1. Need to raise ,appointment rate school health teacher. 2. Need to raise self-confidence on school health nursing activities through the inservice education or re-inforcement. 3. Need to secure adequate budget for school health. 4. Participation of school health teacher and support of school master for school health services are required. 5. Need for use the health clinic seperately, adequate facilities and free utilization by visitors.