국내·외 무역을 위한 해상운송의 양적증가는 선박 및 해양오염사고 증가의 주요한 원인 중 하나이다. 선박에 의한 해양오염 사고 예방 및 경감을 위한 각국의 관련 법․제도 시행에도 불구하고, 선박 종사자에 의한 인적과실(부주의․고의 등)이 해양오염사고 발생의 가장 큰 원인으로 보고되고 있다. 선박 기인 해양오염사고 경감에 가장 효과적인 방법 중 하나는 선박 종사자에 대한 체계적인 교육․훈련을 통해 인적과실을 줄이는 것이다. 따라서 본 연구에서는 「해양환경관리법」등의 국내법령에 근거하여 시행 중인 선박 해양오 염방지관리인에 대한 법정 교육․훈련 교육과정의 적절성을 검토하고 개선방안을 제시하고자 하였다. 이를 위해 법․제도가 우리나라와 유사한 일본의 해양오염 및 해상재해 방지 관련 법정교육․일반교육 과정과 비교․분석을 수행하였으며, 우리나라에서 시행 중인 육상오염방지 및 안전관리 담당 전문가에 대한 법정교육 사례를 조사․검토하였다.

Korea’s elevator industry is one of the world’s eighth-largest industrial sectors and the third largest in the world by new installations. This year, the number of elevators has exceeded 700,000, and the number of new installations is 30,000-40,000 every year. However, the news of elevator-related accidents is reported continuously through the media and the accident rate is not decreasing. In particular, among the recent accidents related to elevators, accidents related to elevator workers are increasing, causing social problems. This year, the National Assembly’s Environmental Labor Relations Commission’s National Auditors lost five lives a year and 12 elevator workers were killed in fall and stenosis accidents during the installation, maintenance and replacement of the elevators for about two years since 2018. It took place to adopt the representatives of four domestic elevator companies as witnesses. An elevator worker is a collective term for workers involved in the design, manufacturing, installation, replacement, maintenance, inspection, management, and supervision related to the elevator industry, and the related accidents are called elevator worker accidents. Analysis of elevator-related accidents in the past has shown that the fault of the user accounted for 70% of the total, and the fault of the worker accounted for about 2.5%, and the accident occurred to the user or the user due to carelessness of the worker during the lift-related work. Currently, elevator-related accidents are reported by the Korea Elevator Safety Agency under Article 48 of the Elevator Safety Management Act under the Ministry of Interior and Safety. If deemed necessary for the prevention and prevention of recurrence of an elevator accident, the cause and condition of the elevator accident may be investigated. However, the current draft law is limited only to elevators after installation inspection, and is separated from the Ministry of Employment and Labor’s data on accidents occurring in the manufacturing and installation stages related to the elevator industry. This study analyzes the recent safety accidents of elevator workers and prepares safety measures to prevent them through the risk analysis, and also draws out the problems and improvements of the current elevator worker accident investigation to find the elevator worker accident rate that is on the increase trend.

Royal jelly (RJ) is a gelatinous substance that bees produce to feed bees and queen bees. It’s frequently sold as a dietary supplement to treat a variety of physical ailments and chronic diseases. While it has long been used in traditional medicine, its applications in Western medicine remain controversial. The inhibitory effect of royal jelly on osteoarthritis was investigated in primary cultured rat cartilage cells and monosodium-iodoacetate (MIA)-induced arthritis rat model 10-hydroxy-2-decenoic acid (10-HAD) is the main fatty acid present in RJ. Among the criteria for RJ quality analysis, 10-HAD content has been proposed as a freshness parameter. We investigated the effect of RJ on the improvement of osteoarthritis on SD rats and they were divided into five groups. In this study, we examined the effect of enzymatic royal jelly (ERJ) administration on osteoarthritis. To determine the antiinflammatory effects of RJ, tumor necrosis factor alpha (TNF-α) and Interleukin-6 (IL-6) expression were measured after lipopolysaccharide (LPS) activation in RAW 264.7 cells. In in vivo animal study, osteoarthritis was induced by intra-articular injection of MIA into knee joints of rats. As a results, ERJ showed that TNF-α and IL-6 levels were decreased by ERJ treatment in a dosedependent manner. In conclusion, ERJ extract was able to inhibit articular cartilage degeneration by preventing extracellular matrix degradation and cartilage cell damage. It was considered that ERJ extract may be a potential therapeutic treatment for degenerative osteoarthritis.

Artificial intelligence (AI) has been applied to most industries by enhancing automation and contributing greatly to efficient processes and high-quality production. This research analyzes the applications of AI-based automobile accident prevention systems. It deals with AI-based collision prevention systems that learn information from various sensors attached to cars and AI-based accident detection systems that automatically report accidents to the control center in the event of a collision. Based on the literature review, technological and institutional changes are taking place at the national levels, which recognize the effectiveness of the systems. In addition, start-ups at home and abroad as well as major car manufacturers are in the process of commercializing auto parts equipped with AI-based collision prevention technology.

본 연구에서는 고추의 수확 및 유통 단계에서 미생물 오염 수준과 그 발생원인을 확인하였고, 이를 바탕으로 수확 단계에 사용된 작업자 장갑의 교체와 온도 관리 및 소형 플라즈마 발생장치를 사용하여 신선 고추에 대한 미생물 오염에 저감화 방안을 모색하고자 하였다. 작업자 장갑 미교체 시 3시간 기준으로 작업 전과 후의 일반세균 미생물 오염증가율이 약 190% 증가하는 것으로 확인되었고, 이에 반해 교체한 작업자의 장갑의 미생물 오염증가율은 15% 증가하는 것으로 나타났다. 유통과정 중 보관 온도는 냉장 보관 보다 상온 보관일 때 미생물 오염 수준이 더 높은 것으로 나타나 냉장 보관이 미생물 오염 예방 에 더 효과적인 것으로 나타났다. 추가로 소형 플라즈마를 이용하였을 때 초기 균 수 대비 5일차에서 일반세균 3.0 log CFU/g 감소, 대장균군, 효모/곰팡이는 불검출로 나타났고 플라즈마 발생장치 없는 경우 5일차에 대장균군이 2.1 log CFU/g 수준으로 검출되어 소형 플라즈마 발생장 치가 보관 및 유통과정 중의 미생물의 저감에 효과적일 것으로 판단되었다. 이상의 결과로 볼 때 수확단계에서 미생물학적 위해요소 발생원인 중 하나인 작업자의 장갑을 주기적으로 교체하고 현장에서 쉽게 수행 가능한 냉장 유통 방법과 신선 고추의 수확 후 보관 및 유통 중에 소형 플라즈마 장치를 이용한다면 고추의 미생물 오염을 감소 시키는데 효과적인 것을 확인할 수 있었다. 또한 고추 이외에도 다른 신선농산물의 수확, 선별 단계나 유통단계에 미생물의 오염을 예방 또는 저감화 하는데 이용이 가능할 것으로 생각된다.

The purpose of this study was to prevent excessive softening of seasoned spinach by heating and freezing through the pre-heating treatment in calcium chloride solution. The pre-heating temperature was set at 60℃, which supports the highest activity of pectinesterase around 60℃. Pre-heating spinach in calcium solution does not affect the chromaticity characteristics of spinach leaves and significantly improves its texture compared to conventional blanching only and pre-heating in water. The improvement of the firmness is related to the formation of strongly cross-linkages between carboxyl groups and Ca2+ by the action of the pectinesterase in spinach. For reheated spinach, the firmness of calcium chloride treated stems were 37.80~44.44 kg, and the control was 28.73 kg. The firmness of calcium chloride treated leaves was 19.73~40.79 kg, and the control was 9.63 kg. Additionally, the total aerobic bacteria in the fresh samples were 3.25~3.99 log CFU/g and 1.97~2.72 log CFU/g in the reheated samples. And the total coliform was not detected in the reheated samples. Considering the color, texture, microbial characteristics and taste quality, the optimum pre-treatment conditions to prevent excessive softening of spinach were 3% calcium chloride solution and 15minutes of treatment.

Electric of using in daily life is always exposed to risk of electrical fire and electric shock. Only degree of risk is different, there is no risk free electrical product. Generally, the higher voltage, the risk of electric shock is high. The much electric current, the risk of electrical fire is high. But, we can’t help using electric because of risk and we effort to reduce the risk of electrical fire and electric shock. This study deal with the fire prevention generated on heating equipment using SSR for current.

해양환경보호, 해양생태계 및 인류의 건강을 보호하기 위한 목적으로 선박으로부터 배출되는 해양오염물질과 유해수중생물 및 병원균을 규제하는 IMO의 MARPOL협약과 선박평형수관리협약이 전 세계적으로 이행되고 있다. 특히 국제해운산업의 특징은 선박이 타 국가의 영역을 넘나들며 종사하는 물류수송이 특징이기 때문에 해양환경오염을 감소 또는 통제하거나 외래생물의 유입을 방지하기 위한 선박의 설계, 구조 및 설비기준 그리고 규제물질의 배출기준은 국제협약을 통해서 이행될 수밖에 없다. 그러나 해상물동량의 증가와 함께 선박의 대형화로 인해 연안국의 해양환경피해가 심각해지면서 국제협약의 기준과 합치하지 않는 일방적인 국가행위가 일부 국가들의 의해서 실행되고 있다. 이 같은 행위에 대해서 국가는 국내법을 원용하거나 또는 국제협약의 예외규정을 인용하여 정당성을 주장하지만, 상황에 따라서 국제법적 정당성은 달리 판단할 수 있는 여지가 있으며, 선박의 권리를 침해한다는 논란이 제기될 수 있다. 이 논문에서는 선박기인 해양오염물질 규제를 위한 일방적인 국가행위 사례를 알아보고, 국제분쟁해결기구의 판단과 일반국제법상 국가책임의 위법성 조각사유에 대한 분석을 통해서 일방적인 국가행위의 정당성을 판단하는 기준을 고찰하였다. 일부 선진국의 해양환경보호 정책과 연관된 일방적인 국가행위로 인해 국가 간의 분쟁이 발생할 가능성이 높으며, 국제분쟁해결기구의 판단에서도 일방적 인 국가행위의 위법성을 인정하고 있음에 주목해야 할 것이다. 유엔해양법협약은 선박기인 해양오염과 관련하여 국가관할권의 예외를 규정하고 있지 않지만, 일반국제법상의 위법성 조각사유 적용이 가능하리라 판단되며, 설사 해양환경 보호를 위한 국가의 행위라 할지라도 매우 제한된 상황의 일방적인 국가행위만 이 정당성을 인정받을 수 있을 것이다

To investigate the effects of antioxidant activities and hair loss prevention of extracts from Platycodon grandiflorum, we’ve prepared chloroform (CF) and ethylacetate fractions (EA) extracted from P. grandiflorum. In the results of DPPH radical scavenging assay, the two fractions showed dose-dependent antioxidant activities. Furthermore, in the ABTS assay, the two fractions exhibited the inhibitory effect over 90% at 10, 50, 100, 200 mg/mL. To investigate the inflammation inhibitory effect, we used RAW264.7 cells, these extracts were inhibited inflammatory reaction by suppressing the production of nitric oxide (NO) and prostaglandin E2 (PGE2) in dose-dependent manner. In the assay of HaCaT cells’ proliferation, the 24 hr treatment of the extracts significantly accelerarted cell proliferation in the range of concentrations used. The two fractions inhibited the proliferation of Malssezia furfur, the bacteria induce the dandruff. Finally, the CF could significantly inhibit the DHT production at 1, 10, 50, 100 μg/mL, but EA showed the inhibitory effect at the concentration over 50 μg/mL. The overall results of this study suggest that the chloroform (CF) and ethylacetate fractions (EA) from P. grandiflorum could be a useful raw material for the hair loss prevention products.

The objective of this study was to investigate the effect of shoe dust on the indoor environment, and the effectiveness of shoe dust control on indoor air quality. Test dust was resuspended to reach a mass concentration of particles (2.5-10 μm size) more than 3 times compared to background level, and 1.5 times for particles less than 1 μm in size. The shoes, which were used for actual walking purposes in the outdoor environment, increased indoor PM10 concentration by 118±9%. The removal of shoe dust by water washing and mechanical suction brought about an improvement of indoor air quality. In particular, in circumstances where 27 people walked for one hour into the indoor environment, the mechanical suction of shoe dust decreased PM10 concentration by about 17% (based on the mass balance analysis).

본 연구는 상사의 성과코칭이 지식공유행동에 미치는 영향을 밝히고자 하였다. 그 과정에서 ‘개인이 대상을 자신의 것처럼 느끼는 상태’로 정의되는 심리적 주인의식을 향상적 주인의식과 방어적 주인의식 으로 구분하였으며, 그중에서 긍정적인 향상적 주인의식의 매개효과를 검증하였다. 또한, 방어적 주인의 식이 향상적 주인의식의 영향을 조절하는 효과를 검증하였다. 본 연구를 수행하기 위해 국내 서울 및 경기 지역의 직장인 260명을 대상으로 설문을 수집하였다. 수집한 자료를 바탕으로 위계적 다중회귀분석을 진행한 결과, 상사의 성과코칭이 지식공유행동에 정적인 영향을 미치는 것으로 나타났다. 또한, 그 관계를 향상적 주인의식이 완전매개한다는 것을 확인하였으며, 향상적 주인의식과 지식공유행동의 관계에서 방어적 주인의식이 유의미하게 조절하는 것으로 나타났다. 이러한 연구결과를 바탕으로 본 연구의 학문적 의의와 실무적 의의를 논의하고, 제한점과 향후 연구과제에 대해 제시하였다.

Background: Fall-related injuries in older adults are a major health problem, and the risks and mechanisms of these injuries should be affected by race, culture, living environment, and/or economic status. Objects: Research articles have been systematically reviewed to understand fall-related injuries in older adults in South Korea. Methods: 128 published research papers have been found through the Korea Citation Index and the Korean Studies Information Service System, and reviewed in various perspectives, including incidents, fall death rates, medical costs, causes, injury sites and types, locations where falls occurred, prevention strategies, scholarly fields interested in fall injuries, and the role of physical therapy. Results: Fall-related injuries were found to be more common in women than in men, and the number of incidents increased with age, with the highest rate found in individuals over 85 years old. Risk of fall injury was associated with education level, comorbidities, and fear of falling. Common places where falls occurred included the bathroom, living room, stairs, and hallway. Common types of injury included bruises, fractures, and sprains in the lower extremities. Intervention strategies included exercise programs, education, and protective clothing. Scholarly fields interested in fall-related injuries in older adults included medicine, nursing, physical therapy, occupational therapy, physical education, pharmacology, oriental medicine, biomedical engineering, design, clothing, and textiles. Physical therapy intervention using proprioceptive neuromuscular facilitation has been used to improve one’s balance. Conclusion: Any movement during the activities of daily living can lead to a fall. Physical therapists are highly educated to analyze human movements and should be involved in more research and practices to solve fall-related injuries in older adults.

본 연구는 심뇌혈관질환 예방프로그램이 지역사회 노인의 심혈관 위험요인과 삶의 질에 미치는 효과를 확인하고자 실시하였다. 유사실험설계의 비동등성 대조군 전후설계를 이용하였다. 연구대상자는 지역사회 노인으로 실험군 22명, 대조군 22명 총 44명을 편의표집하였고, 심뇌혈관질환 예방프로그램을 제 공하고 심혈관 위험요인과 삶의 질을 측정하였다. 심뇌혈관 예방프로그램에 참여한 실험군은 대조군에 비해 심혈관 위험요인인 수축기 혈압(t=-2.419, p= .020), 이완기 혈압(t=-2.226, p= .031), 혈당(t=-2.071, p= .045)이 유의하게 감소하였고 삶의 질은 향상되었다(t=2.511, p= .016). 그러나 총콜레스테롤과 고밀도 지단백콜레스테롤은 유의한 변화가 없었다. 이에 심뇌혈관질환 예방프로그램이 지역사회 노인의 심혈관 위험요인 감소와 삶의 질 향상에 효과적임을 확인할 수 있었다.

The purpose of this study was to determine the safe and effective method for preventing the occurrence of Oryctes rhinoceros Nudivirus in Allomyrina dichotoma on agricultural farms. There is a high demand for the use of A. dichotoma larvae in animal feed and as pet for educational purpose. Recently, we reported that OrNV is fatal virus diagnosed in A. dichotoma larvae in local farms in Korea. Mulberry leaves contain 1-deoxynojirimycin that represented anti-inflammatory, anti-virus, and anti-tumor effects. To prevent OrNV, we have fed the sawdust combined with 1% and 5% mulberry leaves powder to OrNV infected 2nd and 3rd stage larvae of A. dichotoma, and identified the mortality rate(%) during ten weeks. As a results, the 2nd stage larvae which were fed the sawdust combined with 5% mulberry leaves treatment recorded 60% mortality rate after ten weeks compared to the 100% mortality rate in the control. And the fatality rate of 3rd stage larvae which were fed 5% mulberry leaves treatment decreased 70% compared to the control. Therefore, application sawdust combined with mulberry leaves might be effective in the prevention and control of OrNV disease in A. dichotoma. Additionally, in the ten insect breading farms application test, OrNV virus disease have not appeared in the mulberry leaf powder treatment group.