• 한국토양비료학회지
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• 제46권3호
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• pp.143-152
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• 2013

No-till farming system has been extensively studied all over the world as the effective method for maintaining the soil fertility. The general advantages of this system have been well known for reducing the labor, fuel, machinery, and irrigation cost as well as for increasing the soil quality through soil aggregation, water infiltration, microbial population and etc. Recently, it becomes more popular with the increase of interest on sustainable agriculture, especially because of its higher carbon sequestration potential compared to conventional tillage. Crop residue management should be essentially included to look forward to achieving the positive effect on reduction of greenhouse gas. Nonetheless, there are also negative opinions on effect of no-till farming system. For example, some researchers reported that soil physical properties were not improved by no-till under certain soil and climatic conditions. This means no-till farming systems were strongly affected by the soil characters and climatic conditions. Therefore, the researches to meet the specific-regional characters are greatly needed in order for no-till farming system to successfully settle in Korea. The objective of the review article is to present the future direction and perspective on no-till farming system in Korea. For this purpose, we summarized the results of domestic and foreign researches about no-till farming system until now. Specifically, the chapter on foreign research consisted of four parts: positive and negative effects, the effect in paddy soil, and latest research direction (2012-2013) of no-till farming systems. Whereas, review for domestic researches was divided into two main parts: paddy and upland soils. In the final chapter, the priorities for the optimum conservation tillage in Korea were discussed and proposed through the previous researches.

• 한국노년학
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• 제38권3호
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• pp.705-723
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• 2018

본 연구의 목적은 "한국노년학" 학회지에 40년간 게재된 보건 의료 건강분야 연구의 동향을 전반적으로 고찰하고 "한국노년학" 연구의 다학문적 특성과 관련하여 보건 의료 건강 부분이 나아갈 방향을 조망하기 위함이다. 이를 위해 한국노년학 창간호부터 2017년 12월 말까지 40년간 게재된 논문 중 2008년 30주년에 "한국노년학" 1권(1980년)부터 28권(2008년) 2호까지에 게재된 논문 중 건강 간호분야 및 노인보건정책 논문 분석 연구를 검토하고, 최근 10년간 게재된 논문(2008년 3호~2017년 4호) 총 655편 중 237편(전체의 36.2%)을 대상으로 분석하였고, 다음과 같은 연구동향을 확인하였다. 첫째, 최근 10년간의 연구 주제를 대표저자의 전공별로 분석한 결과 보건, 의료, 간호, 체육 분야 저자들은 주로 신체적 건강 주제의 연구를 수행하였고 복지분야 저자들은 정신적 건강 주제의 연구를 주로 다뤘다. 즉, 전반적으로 보건 의료 건강 영역에서는 신체적 건강의 연구가 주로 수행되었다. 둘째, 연구방법 분석결과, 최근 10년간 연구에서는 양적연구가 89.9%를 차지하고 있었고, 지난 30년간(1980-2008)의 연구에서도 양적연구가 81.5%로 대다수를 차지하고 있다. 최근 10년간 수행 된 질적연구는 총 11편으로 나타나 양적연구에 비해 비중이 작은 것으로 나타났으며, 포커스그룹 인터뷰 방법을 활용한 연구가 33.3%로 가장 많은 비중을 차지하는 것으로 나타났다. 셋째, 연구유형은 지난 30년간의 분석에서는 비실험연구가 82.7%였지만, 최근 10년간의 연구에서는 비실험연구가 65.4%를 차지하고 있는 것으로 나타나 보건 의료 건강영역에서 문제해결을 위한 실험연구가 증가하고 있는 것을 알 수 있었다. 넷째, 연구대상은 최근 10년간의 연구에서 건강한 노인, 도시거주 노인, 재가 노인 대상으로 한 연구가 많은 비중을 차지하였으며, 대상노인의 연령은 65세 이상 노인을 대상으로 한 연구가 60.0%로 지난 30년간의 연구에서의 42.7%보다 그 비중이 증가하였다. 대상노인의 성별에 따라 연구동향은 최근 10년간의 연구에서 남녀 모두를 대상으로 한 연구가 81.6%로 나타나 지난 30년 연구의 88.5%에 비해 조금 감소한 것으로 나타났다. 이와 같은 연구결과는 최근 10년간 보다 다양한 연구 접근이 시도되긴 하였으나 여전히 신체건강을 주제로 비실험연구설계를 적용하는 연구가 주를 이루고 있었다. 향후 노인 건강증진연구에서 통합적 다학제적 접근 및 예방적 사전적 관점의 필요성과 함께 급속한 고령화를 경험하고 초고령화가 임박한 한국적 상황을 다각적으로 분석할 수 있는 종단 연구, 질적 연구, 메타 분석 등 다양한 연구방법을 통한 심층적이고 체계적인 연구설계의 필요성을 시사하고 있다.

• 한국보육지원학회지
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• 제13권1호
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• pp.19-41
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• 2017

Objective: This study aimed to provide policy implications by studying the class size of early childhood education institutes. Methods: By looking through researches, the educational influence of class size was examined. By using the latest statistical data, class size standard and status were compared. After class size perception in the field was considered and the main results of advanced researches were summarized and analyzed, the actual condition of class size was diagnosed. Furthermore, the national research trend was analyzed. Results: First, class size was an influencing factor on young children and teachers and its importance was reconfirmed. Second, as for standard in relation to class size in Korea, the maximum class size and teacher-child ratio were not presented together. In respect of overseas standards, infancy has similar standards, but early childhood has a little higher ratio. In the educational fields, there was growing awareness that class size should be modified. Third, there were not enough domestic researches on class size and they tended to be biased in terms of the method, targets, and contents. Conclusion/Implications: It is suggested that it is necessary to establish a class size policy for future early childhood education institutes, to implement a system, and to perform follow-up studies.

• Journal of Information Technology Applications and Management
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• 제19권2호
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• pp.249-263
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• 2012

Recently the open innovation is considered as one of the important issues for the survival strategy of a company in the industry. There have been several researches and practices on this topic. However, previous researches are mainly focused on the study of successful cases and some statistical analyses on the relationship between the open innovation and its performance. There are rare researches on the hindrance factors in the practical level. This paper tries to find some hinderance factors for the open innovation in Korean large-scale companies based on the WFGM(Want-Find-Get-Manage) model proposed by Gene Slowinski(2006). Especially this research focused on each processes of open innovation by in-depth interviews for two representative large companies in Korea. From the result of this research we come to know that the critical hindrance factor in the WANT step is the uncertain definition of the necessary technologies for the company. Issues on establishing and maintaining the innovation network are in the FIND step. Technology evaluation, technology introduction channel and technology copying issues are in the GET step. Communication issues, technology feasibility and lack of competition are in the MANAGE step. This paper finds some hindrance factors in each process step of open innovation, which gives some implications for the companies that want to adopt open innovation.

• 한국학교ㆍ지역보건교육학회지
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• 제16권3호
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• pp.17-29
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• 2015

Objectives: The purpose of this study is to examine the trend of adolescent's smart phone addiction researches from 2012 to 2014 in Korea, and to propose further study for prevention of adolescent's smart phone addiction. Methods: Subjects were 169 researches about adolescent's smart phone addiction from 2012 to 2014 in Korea, and the theme was summarized as following: variables associated with adolescent's smart phone addiction, prevention and intervention strategies of it, the status and development of adolescent's smart phone addiction scale, awareness and prevention of smart phone addiction. Results: As a result of this study, 63.3% were as the most source of researches in 2014, and master's thesis was 74.6 percent. According to the theme of research, the most effects on smart phone addition is self-control and parenting and the most relational variables with smart phone addition are anxiety and parenting. The most affected by smart phone addiction is adaption of school life and conversational breakdown. The studies about prevention of smart phone addiction and intervention examine the effect of therapy program and group consultation. Conclusions: The educational program for using smart phone should be made and applied for preventing adolescent's smart phone addiction.

• 한국정보과학회:학술대회논문집
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• 한국정보과학회 2003년도 가을 학술발표논문집 Vol.30 No.2 (3)
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• pp.49-51
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• 2003

Developers of network games have used several prediction techniques for hiding transmission delay to support the real­time requirement of network games. Nowadays many researches that are related with network game are in progress to solve delay problems more radically, such as to propose new routers architecture and transport protocols suitable to characteristics of network game traffic. So for these advanced researches the tasks to grasp the traffic characteristics of a network game are needed. In this paper we aimed to capture the traffic of MMORPG and present the statistical analysis of measured data. The measurement and the analysis were accomplished with the server of 'Lineage' that regarded as the most successful MMORPG. Next, we have implemented a traffic generator that reflects the characteristics of MMORPG and shown that the trace generated by MMORPG traffic generator had identical characteristics with actual traffic using statistical testing method. We expect that this traffic generator can be used in many researches related with a network game.

• 대한기계학회논문집A
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• 제28권1호
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• pp.55-62
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• 2004

Although the previous researches evaluated the fatigue behavior of glass fiber/epoxy laminates using the traditional fracture mechanism, their researches were not sufficient to do it: the damage zone of glass fiber/epoxy laminates was occurred at the delamination zone instead of the crack-metallic damages. Thus, previous researches were not applicable to the fatigue behavior of glass fiber/epoxy laminates. The major purpose of this study was to evaluate delamination behavior using the relationship between crack length and delamination width in hybrid composite material such as Al/GFRP laminate. The details of investigation were as follows : 1) Relationship between crack length and delamination width, 2) Relationship between delamination aspect ratio and delamination area rate, 3) Variation of delamination growth rate is attendant on delamination shape factors. The test results indicated that the delamination growth rate depends on delamination width delamination aspect ratio and delamination shape factors.

• 한국컴퓨터정보학회논문지
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• 제21권6호
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• pp.83-88
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• 2016

In this research aimed to deduce internal marketing factors, purpose, and their practical application by analyzing preceding researches on internal marketing of Korean medical service organization and investigating the recent trend of its research. Subjects of research are ten preceding researches that have been published in KCI records for the last five years from 2011 to 2016. Summarize result of researches, first, internal factors that were most frequently used were internal communication, compensation system, and education and training, which were used by 8(.8). Second, occupations that had most interest in the internal marketing research appeared to be nursing(.9) and administration(.3). Third, the practical application of the internal marketing appeared to be job satisfaction(.8), followed by customer orientation(.6), and organizational commitment(.4). Suggestion do, necessary to develop subordinate factors regarding the realistic internal marketing, such as both-sided internal communication enhancement, education and training, compensation system differentiated by individuals and teams, fairness in performance rating, work environment improvement, delegation of authority, career development, shared organizational vision in order to maximize job satisfaction, job commitment, and organizational commitment of employees as internal customers, before establishing strategies to satisfy patients and guardians who are external customers.

• 한국항해학회지
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• 제24권1호
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• pp.23-34
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• 2000

The human error or error involved with human is still the major portion of the causes of marine casualties and attracting a great concern in ship operation. However, there are not so many researches conducted to investigate or develop methodologies for analyzing such causes of human error in maritime industry, which may be caused by the variety of factors affecting the performance of ship operation and the characteristics of human being. This paper aims to study the methodologies used in investigating human factors or errors in maritime field through the investigation of researches performed so far. The methodology for human factors can be usually classified into one of three types; descriptive studies, experimental research and evaluation research. Also there are many different kinds of applied researches for some specific subjects. Prior to the investigation of the root cause of marine accident related with human error, clear concept of the human factors and systematic taxonomy shall be established. Moreover, it is very important considerations in case of casualty inspection on human factors that the inspector on the accident shall have adequate knowledges, understandings on the concept of human factors including the way of research more than those of methodologies and techniques.

• Journal of the Korean Physical Society
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• 제73권9호
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• pp.1197-1210
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• 2018

Since the first detection of gravitational-wave (GW), GW150914, September 14th 2015, the multi-messenger astronomy added a new way of observing the Universe together with electromagnetic (EM) waves and neutrinos. After two years, GW together with its EM counterpart from binary neutron stars, GW170817 and GRB170817A, has been observed. The detection of GWs opened a new window of astronomy/astrophysics and will be an important messenger to understand the Universe. In this article, we briefly review the gravitational-wave and the astrophysical sources and introduce the basic principle of the laser interferometer as a gravitational-wave detector and its noise sources to understand how the gravitational-waves are detected in the laser interferometer. Finally, we summarize the search algorithms currently used in the gravitational-wave observatories and the detector characterization algorithms used to suppress noises and to monitor data quality in order to improve the reach of the astrophysical searches.