• Nuclear Engineering and Technology
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• 제54권5호
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• pp.1845-1850
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• 2022

In-vessel corium retention (IVR) during external reactor vessel cooling (ERVC) is a key severe accident management strategy adopted in advanced nuclear power plants. The injection of nanofluids has been regarded as a means of enhancing CHF when using the IVR-ERVC strategy to safeguard high-power nuclear reactors. However, a critical practical concern is that various types of debris flowing from the contaminant sump during operation of an ERVC system might degrade CHF enhancement by nanofluids. Our objective here was to experimentally assess the viability of nanofluid use to enhance CHF in practical ERVC contexts (e.g., when fluids contain various types of debris). The types and characteristics of debris expected during IVR-ERVC were examined. We performed pool boiling CHF experiments using nanofluids containing these types of debris. Notably, we found that debris did not cause any degradation of the CHF enhancement characteristics of nanofluids. The nanoparticles are approximately 1000-fold smaller than the debris particles; the number of nanoparticles in the same volume fraction is 1 billion-fold greater. Nanofluids increase CHF via porous deposition of nanosized particles on the boiling surface; this is not hindered by extremely large debris particles.

• 국제초고층학회논문집
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• 제12권1호
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• pp.35-47
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• 2023

The transport system and its infrastructure are not only the fundamental means of sustaining the operation of contemporary cities, but also important drivers for the evolution of urban form. Rail transit, critical to improving the operational efficiency and optimizing the spatial layout in cities, is one of the critical conditions for high-density areas with limited land and concentrated resources to be compact to take on complex challenges. As a node element of infrastructure, rail transit entrances are the most important points connecting the rail transit system with urban space. Although influenced by urban form, their quantity and location also influence and shape the evolution of urban space form. Based on the development gap of high-density areas in various contexts, focusing on various rail transit stations in Asia, this research analyzes the correlation between rail transit entrances and peripheral high-density urban form in a delicate, dynamic and granular way. The research considers both horizontal and vertical perspectives, in combination with the urban evolution process in time series, to explore the development trend of high-density urban form in Asia from the aspect of correlation, and building a new foundation for research on urban form, suitable for different types of cities.

• 연구윤리
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• 제4권1호
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• pp.1-7
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• 2023

Purpose: Poor anonymity and confidential strategies by a researcher not only develop unprecedented and precedented harm to participants but also impacts the overall critical appraisal of the research outcomes. Therefore, understanding and applying anonymity and confidentiality in research is key for credible research. As such, this research expansively presents the importance of anonymity and confidentiality for research surveys through critical literature reviews of past works. Research design, data and methodology: This research has selected the literature content approach to obtain proper literature dataset which was proven by high degree of validity and reliability using only books and peer-reviewed research articles. The current authors have conducted screening procedure thoroughly to collect better fitted resources. Results: Research findings consistently mentioned the confidentiality and anonymity principles are preserved and implemented as a means of protecting the privacy of all individuals, establishing trust and rapport between researchers and study participants, as a way of critically upholding research ethical standards, and preserving the integrity of research processes. Conclusions: Confidentiality and anonymity are research ethical principles that help in providing informed consent to participants assuring subjects of the privacy of their personal data. As provided by research bodies and organizations, every research process has to incorporate the principles to meet credibility.

• 중환자간호학회지
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• 제17권2호
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• pp.71-82
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• 2024

Purpose : This study aims to identify the factors influencing field adaptation among nurses who have undergone department transfers, by examining the levels of and the relationships between their nursing work environment, interpersonal skills, grit, and field adaptation. Methods : The study involved 137 nurses who had experienced at least one department transfer within the last three years across two hospitals. Data analysis was performed using SPSS/WIN 29.0, involving descriptive statistics, means, standard deviations, independent t-tests, one-way ANOVA, Scheffé post-hoc tests, Pearson correlation coefficients, and multiple regression analysis (enter method). Results : Factors affecting field adaptation included the nursing work environment (β=.37, p<.001), interpersonal skills (β=.19, p=.021) and grit (β=.18, p=.025), with a total explanatory power of 31% (F=12.16, p<.001). Conclusion : This study contributes insights into effective nursing personnel management, offers foundational data for managing department transfers, and aims to improve the overall quality of nursing care.

• 대한간호학회지
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• 제31권1호
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• pp.68-80
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• 2001

The purpose of this study is to analyze ER patient's Triage and other statistical data. The subjects were 12,618 patients who visited the ER during the year 1998. The study showed the following results; 1. The male vs female ratio was 1.3 : 1.0, the male were in the majority (56.6%), and the age range of 20-29 old was the majority (15.3). The patients who visited ER at 8-10 pm were the majority (11.5%). On Sunday the number of patients who visited the ER were 2,189, and the majority were 17.4%. On Saturday the number of patients was visited the ER were 1,944 patients the second majority (15.4%). Their traffic means : the general passenger cars (75.5%), 119 or hospital ambulance (11.3%). 2.The reasons of visiting ER were : diseases (59.2%), injuries (23.7%). The disease vs injury ratio was 100 : 69. 3. Triage : urgent 40.7%, non-urgent 38.2%, acute 17.8%, and critical 3.2%. 4. The time of waiting and staying in the ER by the Triaget: the average time was 572 minutes (9.53 hrs.). The majority of critical patients (20.5%), acute patients (24.7%) and urgent patients (21.2%) stayed 12-24 hrs., but the majority of non-emergent (27.8%) stayed not longer than one hour. 5. Treatments by the Triage : the 42.9% of critical patients, and 61.3% of acute patients, 57.5% of urgent patients were admitted. But 91.8% of the non-emergents were discharged and 4.7% was admitted. Mortality of total ER visiter were 1.7%. DAA portion was 0.86%. 26.6% of the critical patients were DAA. DAA vs DOA ratio was 1.3 : 1.0. 6. Visiting time, monthly and seasonal distribution by the Triage : the majority of critical patients (12.2%), visited 10-12 am. The majority of acute (12.9%) and urgent (11.7%) visited 4-6 pm, but the majority of non-emergents (15.1%) visited during 8-10 pm. Autumn visiter were the majority (27.6%). The percentage of non-emergent visited in Spring was 41.4% and Autumn was 41.3%. The percentage of urgents who visited in the Summer was 45.3% and the Winter was 40.4%. By clinical departments: the 48.0% of critical patients was NS. The 45.5% of acute and the 33.6% of urgent patients were IM. But the majority of non-emergent patients was PS (21.2%), and the second majority of non-emergent patients was oral Surgery (12.8%).

• 기독교교육논총
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• 제70권
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• pp.11-35
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• 2022

본 연구의 목적은 기독교교육학의 실천신학적 접근에 대한 연구로서 실천신학적 접근의 유형에 따른 아홉 가지 교육목회 유형을 제시하는데 있다. 이를 위해 사역의 현장으로서 교회, 사회 이외에 개인적 자아의 차원과 사역을 강조하고자 하며, 이미 논의된 철학적이며 신학적 관점에서의 개인적 실존적 차원, 발달심리학적 관점에서의 삶의 주기 신학의 차원 이외에 사회문화적 차원에서 포스트 디지털 시대가 주는 함의에 기초하고자 한다. 포스트 디지털 시대는 디지털의 인간화로 말미암는 친인간적 디지털 문화를 의미하며, 따뜻한 디지털 문화를 특징으로 하는 시대를 말한다. 이와 연관된 세대를 포스트 디지털 세대라고 한다. 포스트 디지털 세대를 위한 교육목회는 기존의 교회적 차원 및 사회적 차원과 함께 개인적 차원을 포함한다. 세 가지의 교육목회 현장에 대해 간학문적 특성에 따라 비판적 과학적 방법, 비판적 고백적 방법, 비판적 상관 관계적 방법 등으로 아홉 가지의 교육목회 유형이 분류된다. 아홉 가지의 교육목회 유형들에 따른 포스트 디지털 세대가 함양해야 할 대표적인 핵심역량들은 미디어 리터러시, 관계적 정체성, 의사소통, 하이터치, 제자로서의 삶, 매체활용, 통합적 소명, 협업능력, 그리고 다문화 가정 아동 및 청소년의 사회적 회복탄력성 등이다. 포스트 디지털 시대에 포스트 디지털 세대를 위한 교육목회는 역량들에 대한 함양을 필요로 한다.

• 기술혁신연구
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• 제9권1호
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• pp.149-165
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• 2001

This paper analyses characteristics of the numerical controller industry in market formation and the flow of information between users and producers and the characteristic of knowledge base of the industry and discuses the difficulties derived, from the characteristics, in accumulation of technological capability. In market formation between users and producers, the multi-layered market is not favorable to domestic producers in that lower end market is not large enough to provide cradle market to them which produce inferior quality and lower price than imported products. The credibility of the performance of a product is different to prove until a critical mass of products are sold. Therefore gaining market share is deterred by unproven credibility of the performance of the product. The flow of information between users and producers is limited. The flow of information on users environment through mass market to producers is essential for improving credibility of a product. The nature of knowledge base is tacit and the means of knowledge transmission is limited. Technological licensing and reverse engineering, which have been conventional means of knowledge transmission, are not useful in the numerical controller industry. These characteristics provide conditions of vicious circle in accumulation of technological capability of the numerical controller industry. This paper argues that these characteristics of the industry challenge existing approach to R&D management and framework of science and technology policy.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2004년도 학술대회지
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• pp.729-734
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• 2004

The e-Logistics means the virtual business activity and service architecture among the logistics companies based on the Internet technology. The management of vehicles' location in most conventional vehicle tracking system has some critical defects when it deals with data which are continuously changed. It means the conventional vehicle tracking system based on the conventional database is unable eventually to cope with the environment that should manage the frequently changed location of vehicles. The important things in the evaluation of the vehicle tracking system is to determine the threshold of cost of database ,update period and communication period between vehicles and the system. In other words, the difference between the reallocation of vehicle and the data in database can evaluate the overall performance of vehicle tracking systems. Most of the previous works considers only the information that is valid at the current time, and is hard to manage efficiently the past and future information. To overcome this problem, the efforts on moving objects management system(MOMS) and uncertainty processing have been started from a few years ago. In this paper, we propose an uncertainty processing model and system implementation of moving object that tracks the location of the vehicles. We adopted both linear-interpolation method and trigonometric function to chase up the location of vehicles for the past time as well as future time, respectively. We also explain the comprehensive examples of MOMS and uncertainty processing in parcel application that is one of major application of e-Logistics domain.

• Applied Biological Chemistry
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• 제13권3호
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• pp.261-268
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• 1970

1. 대체적(大體的)으로 본(本) 실험(實驗)에서 공시(供試)에서 토양(土壤)의 A-value는 $40{\sim}50kg/10a$(as $P_2O_5$) 선(線)으로 추산(推算)되었다. 2. 시용(施用) 인산(燐酸)의 기여도(寄與度)는 10%선(線)으로 어림할 수 있었다. 3. 이들 시용(施用) 인산(燐酸)의 기여도(寄與度) 및 A-value는 품종(品種) 상호간(相互間)에 상당(相當)한 차(差)를 인정(認定)할 수 있었으며 그 폭(幅)은 대강 30%선(線)이었다. 4. 가급태(可給態) 인산량(燐酸量)의 최대치(最大値)인 A-value와 최소(最少値)인 체내흡수기존(體內吸收旣存) 토양(土壤) 인산량간(燐酸量間)의 비(比)(A/M-value)는 작물체(作物體)에 대한 가급(可給) 한계선(限界線)을 설정(設定)할 수 있는 지표적(指標的) 수치(數値)라고 보아 무방(無妨)할 것으로 생각된다.

• 한국통신학회논문지
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• 제31권4B호
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• pp.349-354
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• 2006

외부 IP 네트워크와 연동하여 다양한 패킷기반 서비스를 제공하는 3G 네트워크 환경에서 서비스의 end-to-end QoS 제공은 중요한 문제이다. 3GPP 진영은 정책기반 네트워크 자원관리 아키텍처를 표준으로 제안하고 있으며, 실제적으로 정책을 수행하는 수단으로 IntServ와 DiffServ의 사용이 권장되고 있다. 본 논문에서는 DiffServ-aware MPLS를 정책 수행 수단으로 사용하는 것을 제안한다. 이 방식을 이용하면, DiffServ에 의해 트래픽의 QoS를 차별적으로 보장하는 것은 물론, MPLS를 통해 다중 경로를 활용할 수 있어 네트워크 자원 이용도를 높일 수 있다. 이러한 장점들은 실시간 트래픽과 비실시간 트래픽이 동시에 서비스되는 환경에서 제안방식을 시뮬레이션 하여 검증하였다.