• 한국수산과학회지
• /
• 제57권3호
• /
• pp.302-309
• /
• 2024

This study estimates the target strength of anchovy Engraulis japonicus required for studying their distribution and density using acoustics and evaluates the acoustic scattering characteristics of anchovies by frequency using the Kirchoff ray mode (KRM) model. The experiment was conducted on 30 anchovies with 4.7-21.5 cm total length. The maximum TS_cm (Simming angle, 9.1°; standard deviation, ± 13.1°) according to total length was -66.9, -65.2, -64.4, and -63.4 dB at 38, 70, 120, and 200 kHz, respectively. The average TS_cm (Simming angle: 9.1°, standard deviation: ± 13.1°) according to total length was -68.9, -68.8, -69.6, and -70.0 dB at 38, 70, 120, and 200 kHz, respectively. The results of this study provide an important basis for future studies that use acoustics to estimate the target strength of anchovies.

• 대한간호학회지
• /
• 제38권5호
• /
• pp.730-738
• /
• 2008

Purpose: The purpose of this study was to identify the mediating effect of depression in the relationship between muscle strength of extremities and falls among community-dwelling elderly. Methods: Two hundred forty-seven participants were recruited from a public health center, a hall for the aged and a school for the aged in B city. Face-to-face interviews were conducted using questionnaires from May to September of 2007. Data was analyzed with descriptive statistics, Pearson correlation, and multiple regression using the SPSS WIN 14.0 program. Results: There was a significantly negative relationship between muscle strength of lower extremities and falls, muscle strength of left upper extremity and falls, and muscle strength of right upper extremity and falls. Depression positively correlated with falls. Depression showed mediating effects between muscle strength of extremities and falls. Weakness of muscle strength of extremities increased depression and the increased depression increased the frequencies of falls. Conclusion: For the effective management and prevention of community-dwelling older adults' falls, exercise programs including depression-decreasing strategies should be established. These exercise programs can decrease depression which is the mediator role between the degrees of muscle strength of extremities and falls.

• 한국건축시공학회:학술대회논문집
• /
• 한국건축시공학회 2018년도 추계 학술논문 발표대회
• /
• pp.42-43
• /
• 2018

The research is to suggest the compensating strength values depending on various managing periods of concrete based on the strength development model calculated with equivalent age method for 20% of blast furnace slag replaced concrete. As a result, for 28 days of managing period, 9, 6, and 3MPa of compensating strength values were suggested when the temperatures were from 4 to 6℃, from 6 to 12℃, from 12 to 17℃, respectively. Additionally, for 42 days of managing period, 6 and 3MPa of compensating strength value was suggested when the temperature was from 4 to 7℃, from 7 to 12℃, and for 56 days of managing period, 3MPa of compensating strength value was suggested when the temperature was from 4 to 9℃. Furthermore, for 28, 42, 56, and 91 days of managing periods, any compensating strength values were needed when the temperature were higher than 17, 12, 9, and 4℃, respectively.

• 가족자원경영과 정책
• /
• 제26권2호
• /
• pp.53-70
• /
• 2022

이 연구는 다양한 가정의 건강성 증진 이라는 건강가정정책 및 제 4차 건강가정기본계획의 강조점에 주목하여 한부모가족의 건강성 지표를 개발하여 제시하고자 한다. 이 지표를 통해 현장의 한부모가족 사업 효율화 및 활성화에 기여하고자 한다. 본 연구가 개발한 한부모가족 건강성 지표는 특히 현장을 방문한 가족이 건강성 지표를 측정하여 강점과 취약점을 발견할 수 있고 이에 근거하여 컨설팅과 사례관리, 교육/상담/자조모임 등 프로그램과의 연계 등으로 이어질 수 있다는 점에서, 다양한 가족에 대한 맞춤형의 사업을 수행할 수 있는 기반이 될 것이다. 한부모가족 건강성 지표를 개발하기 위한 연구방법과 절차로는 먼저, 선행연구를 통해 가정의 건강성, 한부모가족의 실태와 요구를 파악하여 한부모가족 건강성 지표의 영역을 검토하였다. 예비조사를 통해 건강성 지표 초안을 마련하였고, 본조사의 결과를 통계분석하여 지표의 타당성과 신뢰도를 검증하였다. 이러한 과정을 통해 최종적으로 5개 영역(기본적 토대, 부모역할, 일-생활 균형, 사회적 네트워크, 라이프스타일, 가정경영과 생애설계)5개 영역, 총 48개 항목으로 구성된 한부모가족 건강성 지표를 확정하였다. 이 연구가 개발하여 제시한 한부모가족 건강성 지표는 생활과학이나 가정관리학, 가정복지학 등의 고유한 관점을 반영하였다는 점에서 그 의의를 찾을 수 있다. 가정의 건강성은 생활과학, 가정관리학, 가정복지학 등에서 지속적으로 연구해 온 주제이다. 따라서 건강가정지원센터, 가족센터와 같은 현장에서 사업을 할 때 건강성 지표를 활용함으로써 다른 기관 사업과의 차별화를 모색할 수 있다. 나아가 맞벌이가정, 다문화가족, 조손가족, 분거가족 등 다양한 형태의 가정에게 적용할 수 있는 건강성 지표 개발의 선행 자료로서의 유용성도 함께 강조할 수 있을 것이다.

• 가족자원경영과 정책
• /
• 제27권1호
• /
• pp.25-39
• /
• 2023

이 연구는 한부모가족의 특성에 따른 가족건강성의 차이를 분석하였다. 가족의 건강성은 오래전부터 생활과학, 가정관리학, 가족자원경영학 등 학문 분야에서 연구해 온 주제이다. 2004년 건강가정기본법 제정을 계기로 가족의 건강성은 순수한 연구주제에 국한되지 않고 정책의 방향성으로 그리고 현장의 사업에 적용되면서 연구 범주가 확장되었고 이를 통해 연구의 실천성도 함께 강화되었다. 따라서 가족의 건강성 척도를 적용하여 실태조사를 할 때 건강성에 영향 미치는 변수를 탐색할 수 있고, 이 결과에 토대하여 가족건강성 향상을 위한 대안을 마련할 수 있다. 이 연구는 2021년도에 개발된 한부모가족 건강성 척도를 사용하여 267명의 한부모가족 여성(어머니)을 대상으로 한 실태조사 자료를 분석하였다. 분석 결과, 한부모가족 생활 기간, 동거가족 유무, 전배우자와 교류, 근로 형태, 가구소득에 따른 한부모가족의 생활 영역별 건강성의 차이를 발견하였다. 연구결과에 근거한 제안점은 다음과 같다. 한부모가족을 위한 정책 설계나 사업 기획에서 한부모가족으로 산 기간을 고려하고 한부모가족 대상 요구조사에 한부모로 산 기간을 포함해야 한다는 점이다. 이를 통해 한부모가족으로 산 기간에 따른 가족의 특성과 요구를 파악할 수 있고 이 자료는 한부모가족을 위한 맞춤형의 사업에 반영될 수 있다. 나아가 전일제로 일하고 있는 한부모가족의 경우 가정경영과 생활설계 영역에서의 가족건강성 증진을 위해 가족자원경영학이 전문성을 가진 시간관리, 생애설계 등의 연구결과를 현장의 사업으로 전환하여 실천성을 강화할 필요가 있다.

• 한국건축시공학회:학술대회논문집
• /
• 한국건축시공학회 2015년도 추계 학술논문 발표대회
• /
• pp.70-71
• /
• 2015

Construction period is longer than the non-disclosure in civil construction of apartment house. And this process is intensive at the beginning and end of construction. Because this project management expertise is required. Nevertheless, subsidiary work(Working avoid a tendency of advanced technician, Frequent turnover and employment contracts, etc.) management attention of construction is at a lower level. Because of, there are the bad factors(trial and error, finish degradation, etc.). Therefore, this study analyzed Hindrance Factor of quality control on apartment complex construction work and presented importance of civil construction engineer's role. Also, forms of civil construction engineer, Performance experience and technical Strength of apartment complex construction was investigated for the construction. To this end, It analyzes the relationship between forms of civil construction engineer, Performance experience and technical Strength of apartment complex construction and Construction of evaluation as required by Construction Technology Management Act.

• 지식경영연구
• /
• 제17권3호
• /
• pp.23-44
• /
• 2016

This study examined the cause-and-effect relationships among developmental network characteristics, developmental functions, and career identity. The study analyzed the data of employees with more than two years of experience and a college degree or over qualifications, from domestic companies. For analysis, the structural equation model was applied. Most of all, it was substantiated that the structural relationships among the developmental network characteristics, developmental functions, and career identity. The specific results were as follows. First, tie strength had a positive effect on all of developmental functions but psychosocial support mediated the relationship between the tie strength and career identity. Second, an indirect relationship between indicators of network diversity and identity was not found or the indirect relationship was very weak.

• Advances in concrete construction
• /
• 제10권5호
• /
• pp.369-379
• /
• 2020

Reduction of disposal of waste materials due to construction demolition has become a great concern in recent decades. The research work presents the hardened properties of concrete where the partial substitution of recycled coarse aggregate with natural aggregate in amount of 0%, 10%, 30% and 50%. By using different mixed proportions, fresh and hardened properties of concrete were conducted for this investigation. These properties were compared with control concrete. It can be seen that all of the hardened properties of concrete were decreased with the increasing percentage of recycled aggregate in concrete mixes. It was noticed that up to 30% recycled aggregate replacement can be yielded the optimum strength when it used in normal concrete. Finally, it can be said that disposed recycled concrete utilizing as a partial replacement in natural aggregate is a great way to reuse and reduce environmental hazards which achieve sustainability approach in the construction industry.

• 대한안전경영과학회지
• /
• 제10권4호
• /
• pp.127-134
• /
• 2008

The objective of this study is to evaluate the mechanical behaviors and structural integrity of the weldment of high strength steel by using an acoustic emission (AE) techniques. Monotonic simple tension and AE tests were conducted against the 3 kinds of welded specimen. In order to analysis the effectiveness of weldability, joinability and structural integrity, we used K-means clustering method as a unsupervised learning pattern recognition algorithm for obtained multi-variate AE main data sets, such as AE counts, energy, amplitude, hits, risetime, duration, counts to peak and rms signals. Through the experimental results, the effectiveness of the proposed method is discussed.

• Journal of Contemporary Eastern Asia
• /
• 제22권1호
• /
• pp.49-81
• /
• 2023

South Korea is currently facing many changes and challenges. To make matters worse, society has struggled to function as it did before COVID-19. This study describes the past and current COVID-19 situation to offer lessons on management during and after COVID-19. We provide implications from COVID-19 and the foundation for future disasters by employing the strengths, weaknesses, opportunities, and threats (SWOT) analysis and indigenous administrative conceptual framework on culture, institution, and instrument to add a circumstance perspective. This study used secondary data from prior research and literature. Resolutions for these policy issues are presented using the strength-opportunity (SO), strength-threat (ST), weakness-opportunity (WO), and weakness-threat (WT) strategies. We suggest utilizing instruments that consider diverse societies and preventing the disease with climate change by collaborating with social institutions. We hope these implications and resolutions will provide insights for the future and other countries.