• Asia pacific journal of information systems
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• 제32권3호
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• pp.461-476
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• 2022

AI is recognized to be a key technology for digital transformation (DT) and the value of AI is considered to determine the future of the company. However, in reality, although managers acknowledge the future value of AI and have plans to introduce it, most are not sure what to expect from AI or how to apply it to their business. This study compares two company cases to demonstrate how an organization has successfully achieved AI led organizational change while another failed. Specifically, by taking institutionalist's view, this study examines how the legitimacy enables and constrains AI led organizational changes in organization's practices, processes, and infrastructure. The results of this study indicate that for the success of AI led organizational changes, the legitimacy plays an important role by reducing the challenges from stakeholders and increasing the institutional momentum to move through the phases of the change.

• Journal of Korean Neurosurgical Society
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• 제52권3호
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• pp.172-178
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• 2012

Objective : The aim of this study was to determine the role of intra-arterial (IA) nimodipine injections for cerebral vasospasm secondary to ruptured subarachnoid hemorrhage (SAH) and to investigate the factors that influence vasodilation and clinical outcomes. Methods : We enrolled 29 patients who underwent aneurysm clipping for ruptured cerebral aneurysms between 2009 and 2011, and who received IA nimodipine after subsequently presenting with symptomatic vasospasm. The degree of vasodilation shown in angiography was measured, and the correlation between the degree of vasodilation and both the interval from SAH to cerebral vasospasm and the interval from clipping to cerebral vasospasm was determined. The change in blood flow rate after IA injection was assessed by transcranial Doppler ultrasound. Multiple clinical parameters were completed before and after IA nimodipine injection to evaluate any improvements in clinical symptoms. Results : For eight patients, Glasgow Coma Scale (GCS) scores increased by two or more points. The regression analysis demonstrated a positive correlation between the change in GCS scores after IA nimodipine injection and the change in blood vessel diameter (p=0.025). A positive correlation was also observed between the interval from SAH to vasospasm and the change in diameter (p=0.040); and the interval from clipping to vasospasm and the change in diameter (p=0.022). Conclusion : IA nimodipine injection for SAH-induced vasospasm led to significant vasodilation in angiography and improvement in clinical symptoms without significant complications. Our findings suggest that IA nimodipine injection should be utilized when intractable vasospasm develops despite rigorous conservative management.

• 국제초고층학회논문집
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• 제6권2호
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• pp.197-205
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• 2017

The conflict between indoor environmental quality and energy consumption has become an unneglectable problem for highrise office buildings, where occupants' productivity is highly affected by their working environment. An effective Façade, therefore, should play the role of an active building skin by adapting to the ever-changing external environment and internal requirements. This paper explores the energy-saving and indoor environment-improving potential of a phase-change material (PCM) integrated Façade. Building performance simulations, combined with parametric study and sensitivity analysis, are adopted in this research. The result quantifies the potential of a PCM-integrated Façade with different configurations and PCM properties, taking as an example a south-oriented typical office room in Shanghai. It is found that a melting temperature of around $22^{\circ}C$ for the PCM layer is optimal. Compared to a conventional Façade, a PCM-integrated Façade effectively reduces total energy use, peak heating/cooling load, and operative temperature fluctuation during the periods of May-July and November-December.

• 한국가정과교육학회지
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• 제31권4호
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• pp.149-161
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• 2019

현재 우리는 지금까지 아무도 예측하지 못할 정도의 인공지능의 발달과 빠른 기술혁신에 따른 4차 산업혁명시대로의 변화시점에 있다. 본 연구는 '4차 산업혁명시대로의 변화에 따라 가정과교육은 어떤 역할을 수행해야 하는가?'의 문제의식에서 출발하였으며, 구체적으로 4차 산업혁명시대의 특징과 교육의 방향에 따른 가정과교육의 역할에 초점을 맞추어 연구를 진행하였다. 4차 산업혁명의 특징은 인공지능(AI), 클라우드 컴퓨팅(Cloud Computing), 사물인터넷(IoT), 빅 데이터(Big Data), O2O(Online to Offline) 등으로, 일상생활뿐만 아니라 사회체제와 과학기술, 그리고 직업의 구조에 급격한 변화를 가져올 것이다. 그 과정에서 비인간화되어가는 현상, 로봇과 인공지능의 발전에 따른 인간의 도덕성과 윤리적인 면에 문제를 줄 수 있기 때문에, 4차 산업혁명 시대 교육의 방향은 미래 공동체를 위해 함께하는 인성과 시민의식을 갖춘 미래 인재를 양성하는 방향으로 총체적인 변화가 모색되어져야 한다. 또한 초지능, 초연결 사회로의 변화를 가져올 4차 산업혁명이 교육에 주는 시사점은 인간이 인간으로서의 가치를 스스로 내면화하도록 교육의 역할이 강조되어져야 한다는 것이다. 인성교육은 교육과정의 통합 속에서 개념이 정립되고 보편타당한 내면화된 의식으로 자리 잡아야 하며 구체적인 실천적 전략들이 마련되어져야 한다. 결론적으로 4차 산업혁명시대 가정과교육의 역할은 다음과 같다. 첫째, 4차 산업혁명시대 가정과교육은 인간의 본성인 인성교육의 중추적 역할을 담당하여야 한다. 인성교육을 주도적으로 담당해야 한다는 것이다. 또한 4차 산업혁명시대 가정과교육은 인간의 다양한 삶의 본질적인 개선에 선도적 역할을 담당하여야 한다. 4차 산업혁명은 인간의 정신적, 육체적 활동뿐만 아니라, 인간의 정체성도 바뀌어 갈 것이다. 3차 산업혁명 이후의 사회에서는 산재해 있는 지식을 얼마나 신속하고 정확하게 습득할 수 있느냐가 중요했다면 4차 산업혁명의 지능정보화사회에서는 빠른 변화 속에서 인간의 본성을 지키기 위해 지식을 어떻게 활용할 것인지를 배우는 것이 요구된다. 이렇듯 4차 산업혁명은 우리 삶을 형성하는 시스템에 영향을 끼침으로써 가족과 조직, 공동체를 긍정적으로 이끌어갈 수 있는 방향성을 모색하게 되는데 가정과교육이 이러한 역할을 선도적으로 담당해야 한다.

• 가정과삶의질연구
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• 제34권5호
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• pp.1-19
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• 2016

This study attempted to assess the durability of the trend in increasing childcare time and to get some clues based on research findings to make efficient policy interventions in case there is a need to continue or reverse course for such trend. In doing so, a total of 9,668 diaries from the 2004, 2009, and 2014 Korean Time Use Survey were analyzed targeting parents with a preschooler as their eldest child. Parental time was regressed on parents' weekly work hours, mother's relative income, parents' education and gender role attitudes. Furthermore, increase in parental childcare time was decomposed into parts that were attributable to differences in the means and slopes of associated factors. Analytic results revealed that; parents' weekly work hours were associated with time spent on childcare from 2004 to 2014; the negative relationship between mother's relative earnings and her childcare time in 2004 and 2009 was reversed to a positive one in 2014; parent's education had stronger positive effects on father's than on mother's childcare time; parents' gender role attitudes had a weak association with childcare time; social and cultural changes such as decrease in work hours, higher education, more egalitarian gender role attitudes, and rise in women's wages contributed to the increase in parental childcare time, but in a different way for mothers and fathers. By taking into account the social and cultural context behind the changes, this study is able to provide a more constructive implications for childcare policy in Korea.

• 한국수학교육학회지시리즈A:수학교육
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• 제47권3호
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• pp.261-271
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• 2008

First, we have reviewed the concepts of technology as tools, artefacts, and instruments and then introduced constructivism, mathematical communication, and anthropological views on the technology as instruments. Next, this study has supported the anthropological studies considering the facts that learners develop instrumented schemes in the interactions among learners, tools, and mathematical knowledge, and has discussed the change of paradigm. Finally, we have argued that curriculum, epistemology, and relevant studies should be changed to the new paradigm, and then we have discussed that the change of paradigm should be established on the nature, the purpose, the contents, and the assessment in mathematics learning and the role of teachers.

• 수산해양교육연구
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• 제26권3호
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• pp.611-626
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• 2014

Based on adolescents' perspectives, this study attempts to explore the distinguishing characteristics of teachers that influence students to positively change in areas such as psychological adaptation and development of their potential. Essays focusing on memories of twenty seven significant teachers written by eighteen adolescents in middle schools and high schools in Daegu, Korea in 2011 were used for analyzing the factors that have influenced them to positively change. Subsequently, five critical factors were identified: warmness and acceptance; encouragement and support; communication and understanding; respect and care; modeling and expectation. The adolescents perceived that those factors not only contributed to their psychological wellbeing but also enabled them to positively change and achieve more in life. Moreover, the educational implications focusing on teachers' productive function and healing power were discussed. The role of teachers in reinforcing and building the character students in order to facilitate their holistic development was dealt with. Finally, the reference for promotion of further studies of the research field was made.

• 한류연구
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• 제1권2호
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• pp.11-18
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• 2022

International negotiation and cooperation for sustainable development currently emphasize three themes on which environmental policies are developed. South Korea emphasizes two of the three themes; climate change and the 2030 Agenda for Sustainable Development. South Korea has taken a leadership role in the international arena regarding these topics, actively participating in the United Nations Framework Convention on Climate Change (UNFCCC) and the negotiations for the 2030 Agenda (Jung, 2018). South Korea has taken a number of steps to address climate change, both domestically and internationally. Domestically, it has implemented several policies and methods to lessen GHG emissions and transition to a low-carbon economy. It has implemented an Emissions Trading Scheme, the largest in the world, a renewable energy portfolio standard, and aimed at accomplishing carbon neutrality by 2050. South Korea is also actively involved in executing the Sustainable Development Goals (SDGs) and has established a national committee to ensure their successful implementation. The group is made up of representatives from the private sector, government ministries, and civil society organizations. It is focused on monitoring the progress of the SDGs and providing policy and financial support for their implementation.

• 한국농공학회논문집
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• 제59권4호
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• pp.27-42
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• 2017

The global rise in atmospheric $CO_2$ concentration and its associated climate change have significant effects on agricultural productivity and hydrological cycle. For food security and agricultural water resources planning, it is critical to investigate the impact of climate change on changes in agricultural productivity and water consumption. APEX-Paddy model, which is the modified version of APEX (Agricultural Policy/Environmental eXtender) model for paddy ecosystem, was used to evaluate rice productivity and evapotranspiration based on climate change scenario. Two study areas (Gimjae, Icheon) were selected and the input dataset was obtained from the literature. RCP (Representitive Concentration Pathways) based climate change scenarios were provided by KMA (Korean Meteorological Administration). Rice yield data from 1997 to 2015 were used to validate APEX-Paddy model. The effects of climate change were evaluated at a 30-year interval, such as the 1990s (historical, 1976~2005), the 2025s (2011~2040), the 2055s (2041~2070), and the 2085s (2071~2100). Climate change scenarios showed that the overall evapotranspiration in the 2085s reduced from 10.5 % to 16.3 %. The evaporations were reduced from 15.6 % to 21.7 % due to shortend growth period, the transpirations were reduced from 0.0% to 24.2 % due to increased $CO_2$ concentration and shortend growth period. In case of rice yield, in the 2085s were reduced from 6.0% to 25.0 % compared with the ones in the 1990s. The findings of this study would play a significant role as the basics for evaluating the vulnerability of paddy rice productivity and water management plan against climate change.

• Molecules and Cells
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• 제38권6호
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• pp.482-495
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• 2015

Sphingolipids such as ceramide, sphingosine-1-phosphate and sphingomyelin have been emerging as bioactive lipids since ceramide was reported to play a role in human leukemia HL-60 cell differentiation and death. Recently, it is well-known that ceramide acts as an inducer of cell death, that sphingomyelin works as a regulator for microdomain function of the cell membrane, and that sphingosine-1-phosphate plays a role in cell survival/proliferation. The lipids are metabolized by the specific enzymes, and each metabolite could be again returned to the original form by the reverse action of the different enzyme or after a long journey of many metabolizing/synthesizing pathways. In addition, the metabolites may serve as reciprocal biomodulators like the rheostat between ceramide and sphingosine-1-phosphate. Therefore, the change of lipid amount in the cells, the subcellular localization and the downstream signal in a specific subcellular organelle should be clarified to understand the pathobiological significance of sphingolipids when extracellular stimulation induces a diverse of cell functions such as cell death, proliferation and migration. In this review, we focus on how sphingolipids and their metabolizing enzymes cooperatively exert their function in proliferation, migration, autophagy and death of hematopoetic cells, and discuss the way developing a novel therapeutic device through the regulation of sphingolipids for effectively inhibiting cell proliferation and inducing cell death in hematological malignancies such as leukemia, malignant lymphoma and multiple myeloma.