Recently, the government has provided support such as entering new markets, expanding sales channels, and supporting manpower, not just in the form of funding, to efficiently and effectively support limited national resources to improve corporate performance. In this study, we tried to find out the effect of government support for companies that have benefited from the Excellent Technology Research Center Project (ATC Project) and the World Class 300 project using propensity score matching. As a result of the analysis, the effect of government support for the ATC project became visible after the appointment period, while the effect of the World Class 300 project was insignificant. This means that when the size of the company is small, the effect of government support is more pronounced. This suggests that in order to maximize the effectiveness of government support, appropriate national policy interventions such as government innovation funding are needed when the size of the company is small. In this study, differences in the timing, performance indicators, and company size of policy support effects were found in the growth stage of a company from a mid- to long-term time series perspective, suggesting that support policies based on this need to be adjusted and redesigned.

The Ministry of Oceans and Fisheries promoted the installation of eel-ladder for the purpose of creating inland water resources. Currently, eel-ladder have been installed and operated at the Geumgang Estuary Bank (2018), Yeongam Embankment (2019), and Asanman Embankment (2020). In this study, the number of glass eels in eel-ladder in 2021 was monitored and factors affecting the rise that from ocean to river of eels were investigated. Glass eels in eel-ladder were found when the salinity was relatively low, and they started when the freshwater and seawater temperatures were above 20℃. Comparing the number of occurrences by year, the largest number of glass eels was observed in 2021, but it is judged that this is not according to the distribution of glass eels in sea, but rather as a result of the investigator’s eel-ladder repair and guidance on illegal fishing.

The leading source of occupational fatalities is a portable ladder in Korea because it is widely used in industry as work platform. In order to reduce victims, it is necessary to establish preventive measures for the accidents caused by portable ladder. Therefore, this study statistically analyzed injury death by portable ladder for recent 10 years to investigate the accident characteristics. Next, to monitor wearing of safety helmet in real-time while working on a portable ladder, this study developed an object detection model based on the You Only Look Once(YOLO) architecture, which can accurately detect objects within a reasonable time. The model was trained on 6,023 images with/without ladders and safety helmets. The performance of the proposed detection model was 0.795 for F1 score and 0.843 for mean average precision. In addition, the proposed model processed at least 25 frames per second which make the model suitable for real-time application.

본 논문에서는 해양플랜트에 주로 사용되는 알루미늄 사다리의 독자 모델을 개발하기 위하여, 개량형 알루미늄 합금(6082-T6) 을 적용하고 국제 기준에 부합한 구조강도 설계를 하였다. 국제기준은 ISO, NORSOK, Austria Standard를 참고하였으며, 모든 조건이 만족할 수 있도록 하중 조합을 하였다. 설계된 모델은 유한요소법 [Finite elements method]을 근간으로 하는 해양플랜트 전용 해석프로그램인 SACS를 사용하여 구조 안전성을 검증하여 응력 및 처짐이 모두 허용기준 이내에 만족함을 확인하였다. 개발모델은 모든 허용기준을 만족하면서도 가볍고, 생산성이 향상되어 향후 많은 분야에서 사용이 될 것으로 기대해본다.

This study aimed to investigate the effect of ladder-climbing exercise training on neurobiological markers in the hippocampus of mice with type 2 diabetes (T2DM). Twenty-one C57BL/6 male mice were randomly assigned to the non-diabetic control (NDC, n = 7), diabetic control (DC, n = 7), and diabetic training (DT, n = 7) groups. The DT group performed ladder-climbing training (LCT) five times a week for eight weeks. We measured the levels of hippocampal neurobiological markers (catalase [CAT], brain-derived neurotrophic factor [BDNF], nerve growth factor [NGF], amyloid-beta [Aβ], tau, and CC motif chemokine ligand 11 [CCL11]). The BDNF levels were significantly higher in the DT group than in the DC group (p < 0.05). The Aβ and CCL11 levels were significantly higher in the DC group than in the NDC and DT groups (p < 0.05). The tau levels were significantly higher in the DC group than in the NDC group (p < 0.05). However, there was no significant difference in CAT and NGF levels among the groups (p > 0.05). These results suggest that while T2DM could induce neurodegeneration, LCT may be effective in alleviating neurodegeneration caused by T2DM.

Among the industrial disasters caused by drop, ladder related drop disasters are occurred the mostly. The victims are occurred continuously. This study analyzed current situation of industrial disasters for recent 10 years(2005~2014) and compared・analyzed statistics of death disasters of ladder by workplace scale, age, occupation, employment type, working content, scarred area, etc. in detail. This study suggested direction of safety standard modification for ladder that is an original cause material of many drops, direction of safety training strengthening of small-scaled workplace, and safety model based on disaster statistics and should contribute to reduction of disaster rate for ladder working.

Polysilsesquioxanes are essentially hybrid materials consisting of inorganic framework and organic functional groups. A proof of concept study for a new type of gas separation membrane was considered based on the ladder-structured poly(phenyl-co-glycidoxypropyl) silsesquioxanes with phenyl:glycidoxypropyl copolymer ratio of 6:4 (LPG64), which were synthesized by a base-catalyzed sol-gel reaction. Also, by selectively introducing polyethylene oxide (PEO) groups covalently bound to the LPSQ, we effectively suppressed the PEO crystallization, allowing for excellent CO2/H2 and CO2/N2 separation under single as well as mixed gas conditions. Engineering molecular structures of LPSQs will be discussed in detail to investigate the fundamentals of gas transport in LPSQ-based membranes as well as their extended application.

본 연구는 사다리형 폴리실세스퀴옥산 구조에 CO2 친화적인 polyethylene oxide (PEO) 기를 도입하여 우수한 CO2 선택성을 지닌 분리막을 성공적으로 개발하였다. 보다 구체적으로, 세 가지 copolymer 비율 (즉, 40/60, 60/40, 80/20 mol/mol)로 poly(methoxy(polyethyleneoxy) propyl-co-methacryloxypropyl) silsesquioxane을 합성하였고, UV 광경화를 통하여 기계적으로 안정한 분리막을 제조하였다. 이중의 단단한 실록산 백본에 PEO를 공유결합 시킴으로써, PEO의 결정화를 효과적으로 억제하였고, 단일가스와 혼합가스 조건 모두 매우 우수한 CO2/H2 그리고 CO2/N2 분리성능을 지님을 증명하였다.

본 논문의 목적은 창세기에 등장하는 야곱의 사다리에 숨겨져 있는 메시지를 신화적 상징과 신학적 담론의 관점에서 분석하여, 동일한 사건이 신화, 종교, 교리의 문맥에 따라 다양한 의미로 수용되고 발전하는 과정을 추적하는 것이다. 창세기에 등장하는 야곱의 사다리를 신화적 상징과 신학적 담론이라는 두 관점에서 접근할 수 있는 근거는 이 일화가 신화적 상징과 신학적 의미를 동시에 포함하고 있기 때문이다. 유대교도나 기독교인이 아닌 사람의 시각에서 야곱의 사다리는 그리스 로마 신화를 포함한 다양한 신화에서 발견되는 보편적 상징체계로 해석될 수 있다. 하지만 구약성경을 자신의 종교경전으로 간주하는 유대인이 나 기독교인의 관점에서 보면, 야곱의 사다리는 야훼 하나님과 신도 사이의 관계를 설명하는 보다 구체적이며 제한된 신학적 담론 안에서 논의될 수 있다. 야곱의 사다리는 다시 유대교와 기독교의 신학적 담론 안에서 각기 다른 의미로 해석될 뿐 만 아니라, 동일한 기독교 안에서도 가톨릭과 개신교에서 각기 다른 신학적 담론을 형성한다. 본 논문은 이 같은 목적을 위해 네 부분으로 구성되었다. 신화의 영역은 주로 엘리아데의 “우주의 축”의 개념에 따라, 유대교, 가톨릭, 개신교의 영역은 각기 성전, 교황, 만인제사장의 신학적 담론 안에서 “야곱의 사다리”를 분석한다.

Luxury industry is one of the fastest growing fields in marketing research in which many studies have examined how consumers' background affects their preference for luxury products and luxury brands. Classical theories focused on the affluent social classes and their tendency to consume luxury products to consciously or unconsciously signal their wealth. Other studies argued that the internalised culture developed during the socialisation years may influence one’s tastes and preferences for luxuries. Whereas, “costly signal theory” and “affirmation resource theory” suggest that luxury consumption extends beyond the traditional symbolic value of luxury brands and the habituated taste consumption drivers. Despite the wealth of current theoretical approaches, there is little research on the context of status rankings of luxuries and luxury brands. Thus, main objective of the present study is to develop and empirically test a conceptual framework that links consumption of at different rungs of the luxury brand ladder to a number of variables that may act as moderators which will be defined below. The key predictors are economic resources, cultural capital, perceived social status and desired status. The dependent variable is consumption of luxury brands at different rungs in the luxury ladder. A number of hypotheses are proposed and empirically tested. The dependent variable was measured by survey data collected from a sample of US consumers. The results confirm that the frequency of luxury brand purchases is significantly and positively related to consumers’ economic resources and desire for status. The hierarchy of luxury brands consumed is driven by consumers’ economic resources, cultural capital and desire for social status. Regardless of economic resources and perceived social status, consumers with high desire for social status are more likely to buy brands which represent high level of luxury. Likewise, people with higher cultural capital would buy higher luxury grading brands regardless of their economic capabilities. Moreover, results showed that perceived social status is negatively correlated with preferences for higher tier luxury brands of cars. In particular, desire for social status seems to moderates the effect of perceived social status on the hierarchy of brand of luxury car preferences. Desire for status combined with high perceived social status leads to higher preference for higher tier luxury products. It can be concluded that economic resources are responsible for the frequency people buy luxury brands, whereas cultural capital is responsible for the luxury hierarchy of the consumed brands. Frequent consumption of luxury brands reflects one’s economic status whereas the grade of luxury brands his/her cultural status. However, desire for status seems to be a key variable as it affects both frequency and the ranks of luxury brands purchased. This is an important variable as desire for status is not related with neither the actual social status (i.e., economic resources and cultural capital) nor perceived social status.