• 한국경영과학회지
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• 제34권2호
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• pp.91-100
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• 2009

"How does advertising affect sales?" is the fundamental issue of modern advertising research. There is an interesting issue for estimating carryover effects of advertising on sales, and the aggregated data biases exist in the duration of advertising effect. This research suggests an extended model of Koyck Model which is employed for micro-data (Koyck 1954) to estimate aggregated advertising data, and empirically shows the aggregated data bias. Our developed model with the aggregated level of actual advertising data is more appropriate than the basic Koyck model for micro-data. The result figures out that it is important to consider the disaggregated data level in the analysis of dynamic effects of adverting such as carryover effects.

• The Journal of Korean Physical Therapy
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• 제16권2호
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• pp.116-127
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• 2004

The purpose of this study was to determine the effect of shoe lift of the affected limb in subjects with hemiplegia. The subjects of this study were 18 post-stroke hemiplegics. For the study, insole of the paretic side was lifted 10 mm higher, and static weight bearing was measured before and after the lift application. For the measurement of carry-over effect of lift, we got data of those three items prior to and 3 weeks after lift application and 3 days after removal of the lift. Static weight bearing was significantly increased both just after and continuous application of lift for 3 weeks than before. According to this study, lift applied to the shoe of the paretic limb was effective in inducing static weight bearing in the paretic limb. This study suggests that symmetry, induced by shoe lift applied to the paretic limb, could help correct abnormal posture that would be caused in standing and prevent development of abnormal muscle tone in subjects with hemiplegia caused by unilateral stroke.

• 한국경영과학회:학술대회논문집
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• 한국경영과학회 2008년도 추계학술대회 및 정기총회
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• pp.319-323
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• 2008

"How does advertising affect sales?" is the fundamental issue of modern advertising research. There is an interesting issue for estimating carry over effects of advertising on sales, and the aggregated data biases exist in the duration of advertising effect. This research suggests a modified model at micro-data using Koyck model (Koyck 1954) by estimated model the aggregate data, and empirically shows the aggregated data bias. Our modified model with the aggregated level of actual data is more appropriate than the base model for micro-data. The result shows that it is very important to consider the disaggregated data level in the analysis of dynamic effects of adverting such as lagged effects.

• 청정기술
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• 제21권3호
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• pp.191-199
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• 2015

선박용 디젤엔진에서 배출되는 황산화물(SO_x)은 건강과 자연에 대해 악영향을 끼친다. 선박운항이 많은 지역별로 전 세계 곳곳에서는 황산화물 배출규제지역(SECA)을 설정하여 엄격한 배출규제를 설정하여 관리를 강화하고 있는 데 선박으로부터 배출되는 황산화물을 줄이기 위한 방법으로 습식스크러버(wet scrubber)의 적용이 확대되고 있다. 본 연구에서는 분무형 습식스크러버의 유동 내부에서 이루어지는 액체의 운동을 모사하기 위한 수치적 모델을 구성하여 전산유동역학적 방법을 이용하여 액적의 거동을 해석하였다. 실제 습식스크러버 적용 시 문제가 되는 액적의 캐리오버(carry over) 문제를 개선하기 위한 방법을 모색하는 것을 특별주제로 하여 스크러버의 배기부에 굽은 판형 액적제거기(wave plate mist eliminator)를 설치하여 액적의 캐리오버 감소효과를 검토하였다. 전산해석은 총 두 단계로 이루어졌는데, 1차적으로 액적제거기가 없는 기본 스크러버에 대해서 해석을 실시하여 스크러버에서 배출되는 기본적인 캐리오버 양을 확인하고, 다음으로 액적제거기를 부착하여 개선효과를 계산하고 비교하였다. 해석결과, 기본형상에서 비산되는 액적은 제안된 분포의 액적 양의 42.0%가 출구로 비산되었으며, 액적 제거기를 설치한 후에는 비산되는 액적은 제안된 분포의 액적 양의 3.4%로 감소함으로서 액적 제거기의 설치로 인해 비산되는 액적이 감소효과를 확인할 수 있었다.

• Geomechanics and Engineering
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• 제5권1호
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• pp.17-36
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• 2013

Settlement of the piled raft can be estimated even after years of completing the construction of any structure over the foundation. This study is devoted to carry out numerical analysis by the finite element method of the consolidation settlement of piled rafts over clayey soils and detecting the dissipation of excess pore water pressure and its effect on bearing capacity of piled raft foundations. The ABAQUS computer program is used as a finite element tool and the soil is represented by the modified Drucker-Prager/cap model. Five different configurations of pile groups are simulated in the finite element analysis. It was found that the settlement beneath the piled raft foundation resulted from the dissipation of excess pore water pressure considerably affects the final settlement of the foundation, and enough attention should be paid to settlement variation with time. The settlement behavior of unpiled raft shows bowl shaped settlement profile with maximum at the center. The degree of curvature of the raft under vertical load increases with the decrease of the raft thickness. For the same vertical load, the differential settlement of raft of ($10{\times}10m$) size decreases by more than 90% when the raft thickness increased from 0.75 m to 1.5 m. The average load carried by piles depends on the number of piles in the group. The groups of ($2{\times}1$, $3{\times}1$, $2{\times}2$, $3{\times}2$, and $3{\times}3$) piles were found to carry about 24%, 32%, 42%, 58%, and 79% of the total vertical load. The distribution of load between piles becomes more uniform with the increase of raft thickness.

• 대한물리치료과학회지
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• 제8권2호
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• pp.1073-1080
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• 2001

The purpose of this study was to determine the effect of lift to the shoe of the affected limb on gait patterns in subjects with hemiplegia. The subjects of this study were 18 post-stroke hemiplegics. For the study, insole of the paretic side was lifted 10 mm higher, and duration of dynamic weight bearing was measured. before and after the lift application. For the measurement of carry-over effect of lift, we got data of there three items prior to and 3 weeks after lift application and 3 days after removal of the lift. Dynamic weight bearing was significantly decreased in heel contact and footflat phases only when just after application of the lift, without any change after 3 weeks application. In heel-off phase, dynamic weight bearing did not show any significant difference between before and just after application of lift whereas significantly decreased after 3 weeks application. According to this study, lift applied to the shoe of the paretic limb was not significantly effect in inducing dynamic weight bearing, but changed a dynamic weight bearing.

• 농약과학회지
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• 제2권3호
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• pp.85-89
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• 1998

작물 생육에 끼치는 토양 잔류 Paraquat의 영향을 검토하고, 더불어 작물 재배 전후의 paraquat 토양 잔류량 변화와 작물체 중 잔류량을 조사하였다. 1996년도 우리나라 과원 paraquat 토양 잔류량 조사에서 최고 수준인 30.2 ppm을 나타낸 사과원 토양에서 생육시킨 콩(품종: 알천콩)과 보리(품종: 사천6호)의 약해, 입모수 및 초장에 대한 paraquat의 영향은 없었다. 토양 잔류량은 파종일에 약 $9{\sim}9.8$ ppm 수준이었으며, 90일간의 재배기간 중 약간 더 감소되었다. 또한 작물체내 paraquat 잔류량은 모두 0.5 ppm 검출한계 미만이었다. 한편 파종일에 토양잔류량을 약 $27{\sim}32$ ppm으로 강화시켰던 토양에서의 콩(품종: 단엽콩)과 보리(품종: 탑골보리)의 생육도 paraquat에 의하여 영향을 받지 않았으며, 작물체내 잔류량도 0.5 ppm 검출한께 미만이었다. Paraquat 토양 잔류량은 파종후 30일 동안 크게 변하지 않았다. 이상의 실험 결과는 paraquat 토양 잔류량 30 ppm 수은 후 작물 생육에 영향을 끼치지 않으며, 또한 현재 우리나라 과원 토양에서의 작물이 재배될 경우 작물 생육 및 잔류에 있어서 문제가 없음을 시사하여 주었다.

• 한국경영과학회지
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• 제31권3호
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• pp.97-105
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• 2006

Brand Pricing is the most important issue for the brand manager in the dynamic market. in the typical dynamic pricing model, a linear function has been used based on the assumption that the non-Price Influences and the price influences were independent. However, to incorporate the characteristics of the dynamic market, it is natural to consider the multiplicative relationship. We are going to try the multiplicative linkage between the non-price Influences and the price influences and suggest a new dynamic pricing model with e multiplicative functional form. An empirical study of 19 brands in the Korean cigarette market shows the feasibility of the suggested model.

• 한국농공학회:학술대회논문집
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• 한국농공학회 2001년도 학술발표회 발표논문집
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• pp.335-339
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• 2001

The Tropical Rainfall Measuring Mission(TRMM) Satellite was launched in November 1997, carrying into orbit the first space-borne Precipitation Radar(PR). The purpose of this study is to identify the relationship between TRMM/PR and AWS raingage data, and test the possibility to apply storm runoff prediction. Four TRMM/PR data in 1999 for Yongdam watershed was adopted and made a simple linear regression equation using AWS data. By using the equation, the storm runoff was estimated with the adjusted rainfall. TRMM/PR rainfall and runoff was overall underestimated by the carry-over effect of rainfall error and SCS-CN value selection.

• ETRI Journal
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• 제28권5호
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• pp.638-647
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• 2006

This paper investigates two kinds of strategic combinations carried out by the European telecom operators between 1986 and 2001: acquisitions, on the one hand, and strategic alliances, on the other. The aim of the paper is twofold. First, it analyzes the behavior adopted by these companies to adapt to an environment that, after the processes of globalization and privatization presents a clearly different structure. Second, it focuses on the effect that internationalization and diversification could exert over the returns obtained by the European telecom firms involved in acquisitions and alliances, differentiating when such strategic combinations are more profitable for the shareholders of the firms that carry them out.