• Journal of Platform Technology
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• 제10권4호
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• pp.91-96
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• 2022

오늘날 기술이 국가 경쟁력과 직결되는 기술패권 경쟁의 흐름 속에서 연구개발 투자뿐만 아니라 연구개발에 대한 보안중요성이 강조되고 있다. 그러나 연구개발 보안사고 발생이 가져오게 되는 위험성에도 불구하고 연구산출물에 대한 유출사고는 계속해서 발생하고 있다. 본 연구는 이러한 문제를 해결하고자 연구개발 산출물에 대한 유출사고의 사례를 분석하여, 연구기관 중심의 거시적인 보안관리체계보다는 연구현장에 있는 연구자에 대한 규정 개발이 시급하다는 1차적 결론을 도출하였고, 그 다음 현장 관찰방법론을 통해 연구자 중심의 보안대책 설계 방향을 크게 4가지로 세분화하였다. 본 연구를 통해 도출된 연구자 보안대책 설계 방향은 향후 연구 현장에 특화된 규정 및 연구기관 보안 관리 체계 개발을 위한 기초자료로 활용될 것으로 기대한다.

• 한국지반공학회논문집
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• 제22권11호
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• pp.101-111
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• 2006

사면안정해석은 많은 불확실한 요인을 내포하는 지반공학적 문제이다. 이러한 불확실성 중 일부는 해석 수행과정에 필요한 지반 물성의 변동성과관련이 있다 본 연구에서는 확률론적 사면안정 해석기법을 개발하기 위하여 절편법의 일종인 Spencer의 방법을 바탕으로 한 결정론적 해석방법을 지반정수의 불확실성과 공간적 변동성을 고려할 수 있도록 확장하였다. 제안된 방법은 Hasofer-Lind의 신뢰지수를 구하는 일차신뢰도법과 Monte-Carlo Simulation을 바탕으로 한다. 지반정수의 변화에 따른 파괴확률의 변화를 구하기 위해 단일지층과 2층 지반의 사면에 대한 확률론적 사면안정 해석을 수행하였다. 예제의 결과는 사면안정해석에 대한 지반의 불확실성을 고려할 수 있는 관점을 제시하며 확률론적 해석결과에 미치는 지반정수의 공간적 변동성의 영향을 보여준다.

• Advances in concrete construction
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• 제15권4호
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• pp.251-267
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• 2023

In this paper, an experimental investigation is carried out to assess the inherent self-compacting properties of geopolymer mortar and its impact on flexural strength of thin-walled ferro-geopolymer box beam. The inherent self-compacting properties of the optimal mix of normal geopolymer mortar was studied and compared with self-compacting cement mortar. To assess the flexural strength of box beams, a total of 3 box beams of size 1500 mm × 200 mm × 150 mm consisting of one ferro-cement box beam having a wall thickness of 40 mm utilizing self-compacting cement mortar and two ferro-geopolymer box beams with geopolymer mortar by varying the wall thickness between 40 mm and 50 mm were moulded. The ferro-cement box beam was cured in water and ferro-geopolymer box beams were cured in heat chamber at 75℃ - 80℃ for 24 hours. After curing, the specimens are subjected to flexural testing by applying load at one-third points. The result shows that the ultimate load carrying capacity of ferro-geopolymer and ferro-cement box beams are almost equal. In addition, the stiffness of the ferro-geoploymer box beam is reduced by 18.50% when compared to ferro-cement box beam. Simultaneously, the ductility index and energy absorption capacity are increased by 88.24% and 30.15%, respectively. It is also observed that the load carrying capacity and stiffness of ferro-geopolymer box beams decreases when the wall thickness is increased. At the same time, the ductility and energy absorption capacity increased by 17.50% and 8.25%, respectively. Moreover, all of the examined beams displayed a shear failure pattern.

• 한국전문물리치료학회지
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• 제30권3호
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• pp.237-244
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• 2023

Background: The external rotation (ER) exercise in performed at a 90° abduction of the shoulder joint is an effective to strengthen the infraspinatus. However, failure of the humeral head to control axial rotation during exercise can be increased the posterior deltoid over activity. Biofeedback training is an effective method of promoting motor learning and control it could look forward to activate the infraspinatus selectively by controlling the humeral head during exercise. Objects: The aim of this study was investigated that whether biofeedback for axial rotation was effective to activate selectively the infraspinatus during ER exercise. Methods: The 15 healthy males participated, and all subjects performed both ER exercise in a sitting position with shoulder abducted 90° under conditions with and without axial rotation biofeedback. Exercise was performed in a range of 90° ER, divided into three phases: concentric, isometric, and eccentric. The infraspinatus and posterior deltoid muscle activity were observed using surface electromyography. Results: Both infraspinatus activity (p < 0.01) and infraspinatus to posterior deltoid activity ratio (p = 0.01) were significantly higher with biofeedback however, posterior deltoid activity was significantly lower with biofeedback (p = 0.01). The infraspinatus muscle activity and muscle activity ratio were the highest in the isometric contraction type, and there were significant differences for all contraction types (p < 0.05). Whereas, the posterior deltoid activity was the lowest in the isometric contraction type, and showed a significant difference between isometric and other two contraction types (p < 0.05), but no significant different between concentric and eccentric contraction. Conclusion: Our results indicate that the axial rotation biofeedback during sitting ER exercise might be effective method to activating selective infraspinatus muscle and recommended to enhance the dynamic stability of the shoulder joint.

• 대한토목학회논문집
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• 제29권5A호
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• pp.503-510
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• 2009

본 연구의 목적은 LMC로 덧씌우기 또는 보수 된 형태의 RC 보의 정적 거동 특성을 파악하는데 있다. 따라서, LMC로 덧씌우기 및 보수된 RC 보를 상대습도 60%, 온도 $20^{\circ}C$의 조건에서 양생을 실시하여 제작하였으며, 제작된 시험체를 4점 휨 실험을 수행하여 균열양상, 파괴거동 및 극한강도 등의 거동을 고찰하였다. 실험결과 전단철근이 보강된 보수형태의 RC보의 경우 100%이상의 내하력을 회복하여 보수 효과가 뛰어난 것을 알 수 있었고, LMC로 압축부에 덧씌우기 된 시험체의 경우 덧씌우기 두께가 증가함에 따라 내하력이 크게 증진되었다. 그러나, 전단철근이 보강되지 않은 보수형태의 시험체와 인장부 덧씌우기된 시험체는 부착계면 파괴양상을 보여주어 보수 및 보강 효과가 거의 없는 것으로 나타났다. 또한 부착계면의 거동특성을 파악하기 위하여 전단흐름 개념을 도입하여 LMC로 압축 덧씌우기된 시험체를 대상으로 하중증가에 따른 전단흐름량을 계산하여 부착계면 특성을 수치적으로 나타내었다.

• Earthquakes and Structures
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• 제25권2호
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• pp.89-97
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• 2023

In order to obtain the impact of socket connection interface forms and socket gap sizes on the seismic performance of reinforced concrete (RC) socket prefabricated bridge piers, quasi-static tests for three socket prefabricated piers with different column-foundation connection interface forms and reserved socket gap sizes, as well as to the corresponding cast-in-situ reinforced concrete piers, were carried out. The influence of socket connection structure on various seismic performance indexes of socket prefabricated piers was studied by comparing and analyzing the hysteresis curve and skeleton curve obtained through the experiment. Results showed that the ultimate failure mode of the socket prefabricated pier with circumferential corrugated treatment at the connection interface was the closest to that of the monolithic pier, the maximum bearing capacity was slightly less than that of the cast-in-situ pier but larger than that of the socket pier with roughened connection interface, and the displacement ductility and accumulated energy consumption capacity were smaller than those of socket piers with roughened connection interface. The connection interface treatment form had less influence on the residual deformation of socket prefabricated bridge piers. With the increase in the reserved socket gap size between the precast pier column and the precast foundation, the bearing capacity of the prefabricated socket bridge pier component, as well as the ductility and residual displacement of the component, would be reduced and had unfavorable effect on the energy dissipation property of the bridge pier component.

• 운동영양학회지
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• 제16권1호
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• pp.27-33
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• 2012

This study was conducted to investigate the effect of a 24-week combined exercise training program in older women with hypertension. Women with hypertension who were 70 years and older were randomized into two groups: combined exercise group (CE; n = 15) and a control group (n = 15). The CE group performed a combined exercise training program four times per week for 24 weeks and the control group did not. Five factors, including body composition (percent body fat and skeletal muscle mass), health-related physical fitness, adipocytokines (interleukin-6 [IL-6] and tumor necrosis factor-alpha [TNF-α]), kidney risk factors (glomerular filtration rate [GFR] and cystatin C), and systolic and diastolic blood pressure were measured before and after the program. The findings showed that total muscle mass, health-related physical fitness factors, and GFR increased significantly in the CE group compared to those in the control. Additionally, systolic and diastolic blood pressure and IL-6, TNF-α, and cystatin C levels in the CE group decreased significantly after the intervention. In contrast, total muscle mass decreased significantly and blood pressure remained unchanged in the control group. These results suggest that CE training may positively impact circulating levels of adipocytokines and cystatin C and improve physical fitness levels in elderly women with hypertension. Therefore, CE training helps to prevent renal disease and improve health-related physical fitness, eventually leading to a better quality of life.

• 국제학술발표논문집
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• The 8th International Conference on Construction Engineering and Project Management
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• pp.343-352
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• 2020

Modular integrated construction (MiC) is an innovative construction method where components of a building are manufactured in an offsite factory, trucked to the job site in sections, set in place with cranes, and assembled together to form a whole building. Where circumstances merit, favorable conditions exist and implemented effectively; MiC improves project performance. However, several key factors need to converge during implementation to realize the full benefits of MiC. Thus, a thorough understanding of the factors which are critical to the success of MiC projects is imperative. Drawing on a systematic review of 47 empirical studies, this research identified 25 key success factors (KSFs) for MiC projects. Of these, the five topmost cited KSFs for MiC projects include effective working collaboration and communication among project participants; standardization, optimization, automation and benchmarking of best practices; effective supply chain management; early design freeze and completion; and efficient procurement method and contracting. The study further proposed a conceptual model of the KSFs, highlighting the interdependences of people, processes, and technology-related KSFs for the effective accomplishment of MiC projects. The set of KSFs is practically relevant as they constitute a checklist of items for management to address and deal with during the planning and execution of MiC projects. They also provide a useful basis for future empirical studies tailored towards measuring the performance and success of MiC projects. MiC project participants and stakeholders will find this research useful in reducing failure risks and achieving more desired performance outcomes. One potential impact of the study is that it may inform, guide, and improve the successful implementation of MiC projects in the construction industry. However, the rigor of the analysis and relative importance ranking of the KSFs were limited due to the absence of data.

• Asia Marketing Journal
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• 제14권4호
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• pp.35-56
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• 2013

The era of globalization provides us with both opportunities and threats. The success of a multinational corporation depends largely on its ability to adapt itself to new market environment. We believe that understanding and implementing multicultural PR strategy can be a key to the multinational corporations' success in foreign markets. We argue in this paper that even a global iconic company such as Google needs to focus on how to understand local consumers' needs and preferences before formulating and implementing PR strategy. Having a global hit product or service is not sufficient enough to be successful in some foreign markets. It is especially more evident in the industries where companies deal with individual consumers, and perceptions and sentiments play a large role in their purchase decisions. The objective of this research is to find out the relationship between multicultural PR strategy and business performance. Therefore, our main hypothesis is; better implementation of multicultural PR strategy by a multinational corporation will result in higher performance in the foreign markets. To prove the relationship between multicultural PR strategy and performance, we designed a framework that uses Rudan's (2004) five rules for multicultural PR strategy. It is a contribution to the business academics as there are very few studies that directly focus on and analyze the multicultural aspects of a multinational company's PR strategy. Through our research, we found strong evidence that there is a positive relationship between the level and effectiveness of a company's multicultural PR strategy and its performance in the foreign markets. This offers some meaningful implications to the managers of the multinational corporations and those who are considering going into a foreign market for the first time. We also suggested a way of measuring the implementation of multicultural PR strategy. By applying five rules for multicultural PR strategy to Google's PR activities, it allowed us to convert qualitative information into quantitative data. This kind of tool can be helpful for multinational corporations that want to evaluate their own PR activities.

• Asia Marketing Journal
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• 제10권1호
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• pp.1-23
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• 2008

고객만족경영을 통하여 기업이 이윤의 증진을 도모하는 것은 자명한 일이다. 따라서 고객만족과 기업성과와의 직접적인 관계를 밝히는 것은 학술적으로나 실무적으로 매우 중요하다. 고객만족이 기업경영성과에 미치는 영향에 관한 지금까지의 연구에서는 주로 당기의 고객만족이 당기의 기업경영성과에 미치는 현재효과를 분석하였다. 그러나 마케팅활동이 동태적 효과를 갖는다는 연구에 의하면 고객만족이 현재뿐만 아니라 미래의 기업 경영성과에 미치는 동태적 효과의 검증이 필요하다. 만약 이 효과가 존재함에도 불구하고 이를 충분히 측정하지 못한다면 고객만족의 효과는 낮게 평가될 것이다. 이에 본 연구에서는 패널자료분석을 통하여 기업의 수익성과 기업가치에 미치는 고객만족의 동태적 효과를 추정하였다. 연구결과, 고객만족은 기업의 수익성과 기업가치에 긍정적인 영향을 주며, 동태적 효과를 갖는 것으로 분석되었다. 또한 모형 추정결과, 모형의 적합도에서 이유재와 이청림(2006)보다 개선이 이루어 졌다. 한편 고객만족의 과거 항을 2기까지 추가한 비교모형은 추정결과의 해석이 어렵고, 다중공선성 문제가 있는 것으로 분석되었다.