• Animal Bioscience
• /
• 제34권4호
• /
• pp.734-742
• /
• 2021

Objective: The present study aimed to investigate the occurrence and species of coagulase-positive staphylococci (CoPS) and coagulase-negative staphylococci (CoNS) in retail pork meat samples collected during nationwide monitoring. The staphylococcal isolates were characterized for antimicrobial and zinc chloride resistance and enterotoxigenic potential. Methods: A total of 260 pre-packaged pork meat samples were collected from 35 retail markets in 8 provinces in Korea for isolation of staphylococci. Antimicrobial and zinc chloride resistance phenotypes, and genes associated with the resistance phenotypes were determined on the isolates. Furthermore, the presence and distribution of 19 staphylococcal enterotoxin (SE) genes and enterotoxin-like genes among the pork-associated staphylococci were determined by multiplex polymerase chain reaction-based assays using the specific primer sets. Results: A total of 29 staphylococcal strains (29/260, 11.1%) were isolated from samples of retail pork meat, 24 (83%) of which were CoNS. The four CoNS species identified were S. saprophyticus (n = 16, 55%), S. sciuri (n = 3, 10%), S. warneri (n = 3, 10%), and S. epidermidis (n = 2, 7%). Among the 29 isolates, four methicillin-resistant CoNS (MR-CoNS; three S. sciuri and one S. epidermidis) and one methicillin-resistant CoPS (MR-CoPS; one S. aureus) were identified. In addition, a relatively high level of tetracycline (TET) resistance (52%) was confirmed in CoNS, along with a predominant distribution of tet(K). The most prevalent SEs were sep (45%), and sen (28%), which were carried by 81% of S. saprophyticus. Conclusion: These findings suggest that CoNS, especially S. saprophyticus strains, in raw pork meat could be a potential risk factor for staphylococcal food poisoning (SFP), and therefore, requires further investigation to elucidate the role of SEls in SFP and virulence of the pathogen. Our results also suggest that CoNS from raw pork meat may act as a source for transmission of antimicrobial resistance genes such as staphylococcal cassette chromosome mec and tet(K).

• 조명전기설비학회논문지
• /
• 제21권9호
• /
• pp.57-63
• /
• 2007

The occurrence of a corona is that electrical discharge due to the heterogeneity that occurs when an electrical field is concentrated in an electrode due to a cusp formed on said electrode. Wire treatment at the end of a 154[kV] dead end clamp for end users accelerates the occurrence of corona, which in turn leads to power loss and noise. In this study, the characteristics of the corona which occurs between porcelain insulators and support clamps of overhead lines used in 154[kV] power receiving facilities for end users were investigated. The corona, which cannot be identified by one common method, was measured utilizing a UV image camera. A risk assessment for fire damage and its status was suggested. The stress distribution of the electrical field by length of bare wire was suggested by means of the finite element method(FEMLAB). As a result, it was found to affect a porcelain insulators. These results can be utilized for the enhancement of clamp installation and safety in power facilities.

• 한국신뢰성학회지:신뢰성응용연구
• /
• 제17권1호
• /
• pp.11-21
• /
• 2017

Purpose: The occurrence ranks of failure modes can come from the real failure but the severity ranks of failure modes require a highly subjective point of view of users. The severity ranks have to find more objective and scientific values. Methods: We found the optimal values by using the correlation analysis between failure mode effects and the criticality number like RPN (Risk Priority Number) in RCM. Result: This paper shows the result that verified whether the weighted values on each failure effect in criticality number calculation is suitable to the actual failures or not. To get the verification, it used the 5 year data and correlation analysis. Based on the analyzed result, We proposed the more suitable values. Conclusion: This correlation analysis approach can provide guidance of RCM analysis across many industries and situations.

• 전력전자학회:학술대회논문집
• /
• 전력전자학회 2018년도 전력전자학술대회
• /
• pp.278-279
• /
• 2018

Due to the frequent occurrence of dangerous wild animals in rural or mountainous areas. it has been increasing damage of crops in every year. Fight bell or electric fence is typically installed to chase those wild animals. But there are problems that it is impossible to drive out birds and spends high installation and maintenance cost. In addition, it is inefficient to the risk of electric shock effect. In this study, the proposed system can drive out hazardous wildlife and birds regardless of installation location through realtime detection with the multi-sensing based IoT platform technology. This study showed a very large significance effect that can reduce crop damage by wildlife and birds.

• Asian Pacific Journal of Cancer Prevention
• /
• 제14권10호
• /
• pp.5671-5674
• /
• 2013

Incidence of breast cancer shows geographical variation, even within areas of ethnic homogeneity. Saudi Arabia has witnessed an increase in occurrence of breast cancer in its unexplored ethnic populations over the past few years. We aimed at determining whether any association exists between single nucleotide polymorphisms in breast cancer associated gene 1 (BRCA1) and breast cancer associated gene 2 (BRCA2) and the risk of breast cancer. TaqMan based Real Time Polymerase chain reaction genotyping assays were used to determine the frequency of single nucleotide polymorphisms in BRCA1 (rs799917) and BRCA2 (rs144848) in a group of 100 breast cancer patients and unaffected age matched controls of Saudi Arabian origin. The present data revealed that neither BRCA1 nor the BRCA2 studied variant show any significant association with the disease. This study failed to find any role of the concerned variants in breast cancer either as risk or as prognostic factors. The small number of patients registered was one of the limitations of this study. In summary, comparison of mutation profile with other ethnic populations and regions reflected both differences and similarities indicating co-exposure to a unique set of risk factors. The differences could be due to exposure to particular environmental carcinogens; different lifestyle, reproductive pattern; dietary or cultural practices of Saudi Arabian women that need further investigations.

• Safety and Health at Work
• /
• 제11권2호
• /
• pp.127-135
• /
• 2020

A safe work environment is crucial in high-risk industries, such as construction refurbishment. Safety incidents caused by uncertainty and unexpected events in construction refurbishment systems are difficult to control using conventional safety management techniques. Resilience engineering (RE) is proposed as an alternative to traditional safety management approaches. It presents a successful safety management methodology designed to deal with uncertainty in high-risk work environments. Despite the fact that RE resides in the safety domain, there is no common set of RE indicators to measure and assess resilient in the work environment. The main aim of this research is to explore RE indicators that have been identified as important in developing and assessing the resilient work environment in high-risk industries, particularly in construction refurbishment. Indicators have been attained through a systematic literature review of research and scholarly articles published between the years 2004 and 2019. The literature review explored RE indicators in various industries. Descriptive analysis and co-occurrence-based network visualization were used for data analysis. The findings revealed 28 RE indicators in 11 different high-risk industries. The results show that the four commonly used indicators were: top-management commitment, awareness, learning, and flexibility, all of which have a strong relationship with RE. The findings of this study are useful for stakeholders when making decisions concerning the most important RE indicators in the context of their research or practice as this would avoid the ambiguity and disparity in the identification of RE indicators.

• 농업과학연구
• /
• 제48권1호
• /
• pp.33-43
• /
• 2021

Along with the widespread use of pesticides in the world, concerns over human health impacts are rapidly growing. There is a large body of evidence on the relationship between the exposure to pesticides and the elevated rate of chronic diseases such as different types of cancers, diabetes, neurodegenerative disorders like Parkinson, Alzheimer, and amyotrophic lateral sclerosis (ALS), birth defects, and reproductive disorders. This research assessed the health risk of pesticide residues by the dietary intake of vegetables collected from the agro-based markets of Dhaka, Bangladesh. As some of the banned pesticides were also found in vegetable samples, they may pose a higher risk because of cheaper availability and hence the government of Bangladesh should take strong measures to control these banned pesticides. Five organo phosphorus (chlorpyrifos, parathion, ethion, acephate, fenthion) and two carbamate (carbaryl and carbofuran) pesticide residues were identified in twenty four samples of two common vegetables (tomato and brinjal). The pesticide residues ranged from below a detectable limit (< 0.01) to 0.36 mg·kg^-1. Acephate, chlorpyrifos, ethion, and carbaryl were detected in only one sample, while co-occurrence occurred twice for parathion. Continuous monitoring and strict regulation should be enforced regarding the control of pesticide residues in fresh vegetables and other food commodities in Bangladesh.

• 한국방재안전학회논문집
• /
• 제15권4호
• /
• pp.79-86
• /
• 2022

국립공원공단에서는 낙석위험지역에 낙석방지시설(낙석방지망, 낙석방지울타리, 피암터널 등)을 설치하거나 우회탐방로를 개설하는 등 안전 환경 조성을 위한 노력을 하고 있다. 그러나 기후변화에 따른 집중호우나 겨울철 이상 고온, 지반의 노령화로 인한 풍화와 절리현상으로 매년 낙석 발생이 증가하는 추세이며, 기존 낙석위험지역 관리방안에 대한 개선의 필요성이 대두되었다. 본 연구에서는 우리나라 국립공원 중 치악산 국립공원 황골지구를 대상으로 하여 낙석 발생의 위험이 있는 시범지역을 선정한 후 Rockfall 프로그램을 이용한 낙석 분석을 수행하였으며, 분석 결과에 따라 시범지역에 계측시스템과 결합한 대책공법을 적용하여 모니터링을 실시하였다. 이를 통해 낙석의 지속적 관리와 모니터링을 위한 낙석 관리방안을 제시하였다.

• 한국방재안전학회논문집
• /
• 제16권2호
• /
• pp.99-104
• /
• 2023

최근 들어 이상기후 발생이 급증하여 집중호우의 발생 빈도가 증가하고 있다. 이로 인해 안정적인 수자원관리가 어려운 실정이며, 인적·물적 피해가 과거에 비해 늘어나고 있다. 집중호우로 인한 피해저감을 위해 여러 대책을 마련하고 있으나 소규모 산지유역의 경우 상대적으로 기본계획 수립부재 등으로 인하여 관리에 어려움을 겪고 있다. 본 연구는 안전한 국립공원의 관리를 위한 기초 연구로서 소백산 국립공원 내 연화동 유역을 대상으로 강우-유출모형을 활용해 유출량을 산정하였다. 소백산 연화동 유역은 재현빈도 50년 이상의 강우가 발생했을 때의 홍수위와 과거 발생한 홍수흔적수위를 비교했을 때 모형의 적합성을 확인하였다.

• 한국문헌정보학회지
• /
• 제56권1호
• /
• pp.253-275
• /
• 2022

Niklas Luhmann은 사회학 이론가들 중 가장 논쟁적이고 난해한 학자이면서 동시에 근 10년간 후속연구가 증가하고 있는 학자이다. 이 연구의 목적은 Luhmann의 후속연구들이 Luhmann의 난해한 개념을 어떻게 사용하고 있는지를 관찰하는 것이다. 이 연구는 선행연구와 달리 분석의 단위를 논문이 아니라 키워드로 채택하였다. 키워드는 개념을 관찰 가능하게 만드는 언어적 구성물이기 때문이다. Web of Science의 검색결과 나온 139편의 사회과학 분야 논문의 키워드를 동시출현빈도 분석하였다. 연구 결과는 다음과 같다. 첫째, 가장 중요한 키워드가 Luhmann의 이름과 이론의 이름이었다. 둘째, 클러스터링은 사회적 체계 이론, 일반체계이론, 법 체계와 정치체계, Luhmann 이론의 사회이론적 의의 등 4가지로 묶였다. 셋째, 핵심어가 'systems theory(일반체계이론)', 'communication(소통)', 'Autopoiesis(자기생산)', 'risk(위험)', 'legal system(법 체계)', 'functional differentiation(기능적 분화)', 'environment(환경)', 'social theory(사회적 이론)', 'sociological theory(사회학적 이론)', 'structural coupling(구조적 연결)', 'systems(체계들)', 'evolution(진화)'로 도출되었다. 이 연구의 의의는 다음과 같다. 첫째, 핵심어를 도출해내 Luhmann의 이론을 처음 접근하는 사람들에게 유용한 접근점을 제공하였다. 둘째, 난해한 이론적 연구의 동향 분석에도 키워드 네트워크를 통한 내용분석이 가능함을 증명하였다.