• Proceedings of the Korea Information Processing Society Conference
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• 2023.05a
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• pp.394-395
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• 2023

"이성적이며 이상적인 합리적 인간"을 가정하는 기존 경제학의 이론이 항상 실제 상황과 일치하지는 않는 것으로 알려져 있다. 이의 대안으로 나온 행동경제학은, 인간의 경제적 의사결정에 심리, 인지, 감정, 사회문화적 배경 등이 영향을 미친다고 본다. 본 연구에서는 행동경제학에 의거하여, 개인의 감정과 경험이 경제적 의사결정에 영향을 미치는지 여부를 빅데이터 모델을 활용하여 분석하였다. SNS 여론으로는 Reddit, 주가지수로는 S&P 500 을 선정하였다. 수집한 텍스트 데이터를 전처리와 감정분석을 통해 독립변수 값으로 사용했고, 주가지수 등락의 방향성을 종속변수로 사용하여 로지스틱 모형을 구성했다. 모델을 활용하여 분석한 결과 Public sentiment 와 Market sentiment 간 양의 상관관계를 확인할 수 있었다. 또한, lag 를 설정하는 모델이 정확도가 더욱 높음을 확인해, 기존 경제학의 EMH 와 대립되는 바를 확인할 수 있었다. 하지만 최적의 lag 산정을 위해, 더 광범위한 데이터를 바탕으로 한 후속연구가 필요하다.

• The KIPS Transactions:PartD
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• v.17D no.3
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• pp.233-244
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• 2010

This research aims to examine the efficiency and effectiveness of the governmental policies promoting IPTV by verifying their influences on the adoption empirically. The government unveiled several policies including creating demands in public sectors, developing diverse public contents, subsidizing the production of converged contents, easing the regulations to promote IPTV industry. While a lot of previous literature has already proved that a system quality, a content quality, and a perceived price have influences on the adoption of IPTV, the effects of governmental policies are not well understood despite of their contributions to the adoption. Rather, most of existing research on governmental policies in the context of technology adoption have focused on regulatory frameworks. The results of the study show that governmental policies have influences on consumers' perceived system quality and content quality. It is also found that perceived system quality, content quality and perceived price have influences on adoption intention. This study can contribute to the field in a way that it proves the important roles of governmental policies in the diffusion of new technologies including IPTV.

• Spatial Information Research
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• v.23 no.3
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• pp.79-89
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• 2015

Once the building is higher than certain size, the wind effect plays very important role in structure design. Moreover, this is more important in Korea because dangerous phenomena like typhoons are common. Rational wind resistant design is being magnified considering the global flow and climate changes. This research presented the estimation method of design wind load using spatial information analysis based on 1:5,000 digital map and performed comparative analysis with actual application cases. The wind velocity pressure exposure coefficient and topographic coefficient turned out to be more quantitative and rational when calculated through the proposed method. The time and cost are comparatively low when compared with traditional method which contribute to the economic and rational wind resistant design.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.10 no.1
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• pp.87-97
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• 1990

There is the need to balance safety, economy and serviceability in all phases of society problems. This is especially true in structural code formulation. where a framework is established by which practicing structural engineers can be assured of designing structures that reasonably meet the above three objectives. The existing design codes, which are generally based on the structural theory and certain engineering experience, do not realistically consider the uncertainties of loads and resistances and the basic reliability concepts. The purpose of the present study is therefore to develop the realistic reliability-based design criteria to secure adequate safety arid reliability, and to derive the models for partial and combined resistance factor formats. To this end, the reliability levels of our existing design code for concrete structures are first evaluated and the target reliabilities are determined, the new code formats are evolved from these target reliabilities. The present study indicates that the proposed formats exhibit relatively-uniform reliability and reasonably take into account the different material characteristics of concrete and steel in concrete structures.

• Journal of Animal Science and Technology
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• v.53 no.5
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• pp.497-502
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• 2011

The present survey was conducted to provide basic information on Hanwoo calf weaning age and farmer's understanding of early weaning. Eight hundred and sixty-two Hanwoo breeding farms from all nine provinces were surveyed via personal interviews. The percentages of farms categorized by herd size were 30.5%, 32.8%, 26.0% and 10.7% for <50 heads, 51~100 heads, 101~200 heads and >200 heads, respectively. The percentage of farms weaning calves at three months of age were 39.2% and 12% of farms weaned calves less than two months of age. But the percentage of farms weaning at or over four months of age were still high, being 16.1% at four months of age and 16.6% over five months of age, respectively. The result of the present study showed that calf weaning age in Hanwoo was inconsistent and higher percentage of farms wean calves at three months of age among the surveyed farms. The improvement of cow reproductive performance was answered as the biggest merit of early weaning.

• Journal of Korean Philosophical Society
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• v.116
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• pp.281-312
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• 2010

Der vorliegende Beitrag problematisiert die Zeichen einer Zeit, in der nach der 'Wende des Sprachparadigmas' alle Prozesse einer Posttranszendenz, die in der heutigen philosophischen Problemsituation versucht werden, $bel{\ddot{a}}chelt$ werden, der Relativismus, Partikularismus und Skeptizismus $verst{\ddot{a}}rkt$ wird, und als Resultat die Kritik, Ablehnung und das Desinteresse an der Ideologie der Vernunft und Wahrheit sich verbreitet. Ich werde daher umgekehrt gerade an diesem Punkt ansetzen und ${\ddot{u}}ber$ die Notwendigkeit und Dringlichkeit der Rehabilitierung der "$Realit{\ddot{a}}t$ einer moralischen Vernunft" nachdenken. Zweck dieses Beitrags ist es, in Zusammenhang mit der Rehabilitierung der $Realit{\ddot{a}}t$ einer moralischen Vernunft, aufzuzeigen, welche theoretische Erkenntnis bzw.moralische Erkenntnis wahr ist, d.h., dass ein 'bewiesenes', da 'objektiv gerechtfertigtes' Argument existiert. $Daf{\ddot{u}}r$ werde ich als erstes auf das Problem der Relativistischen und Skeptizistischen Anhaltspunkte philosophisch eingehen(2), zur ${\ddot{U}}berwindung$ dieser Anhaltspunkte eine Rechtfertigung der rationelen und moralischen $Begr{\ddot{u}}ndung$ versuchen(3). In Folge soll betrachtet werden, dass die Rechtfertigung der rational moralischen $Begr{\ddot{u}}ndung$ mit dem Problem der $Letztbegr{\ddot{u}}ndung$ in enger Verbindung steht(4), und nachdem darauf hingewiesen wird, dass dies durch eine Konfrontation mit der Fallibilismus These zu erkenntnistheoretisch objektiver $G{\ddot{u}}ltigkeit$ gelangt(5), werde ich den Beitrag $abschlie{\ss}en$(6).

• Korean Journal of Construction Engineering and Management
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• v.16 no.4
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• pp.3-11
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• 2015

Apartment developers consider the initial sales rate as an important indicator for their success of apartment development projects. They tried to achieve a secure level of initial sales rate. In spite of its importance, there is little research on the initial sales rate because of the difficulties in gathering proper data for analysis. This study, however, collects the data in initial sales rates in Su-won from various sources such as construction companies, marketing companies, sales companies and so on. By using this rare data, this study analyses the initial contract rate of apartment and estimates the initial contract rate by sales price. The result of this study shows that important of land area ratio, brand, and distance to park. It is expected that the proposed model will be used for apartment developers in sales planning phase.

• Journal of Korean Society of Transportation
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• v.22 no.2 s.73
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• pp.121-130
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• 2004

In these days, multiple-path generation method is highly demanded in practice and research areas, which can represents realistically travelers behavior in choosing possible alternative paths. The multiple-path generation algorithm is one of the key components for policy analysis related to ATIS, DRGS and ATMS in ITS. This study suggested a method to generate multiple Possible paths from an origin to a destination. The approach of the suggested method is different from an other existing methods(K-shortest path algorithm) such as link elimination approach, link penalty approach and simulation approach. The result of the multi-label vine-building shortest path algorithm(MVA) by Kim (1998) and Kim(2001) was used to generate multiple reasonable possible paths with the concept of the rational upper boundary. Because the MVA algorithm records the cost, back-node and back-back node of the minimum path from the origin to the concerned node(intersection) for each direction to the node, many potential possible paths can be generated by tracing back. Among such large number of the potential possible paths, the algorithm distinguishes reasonable alternative paths from the unrealistic potential possible paths by using the concept of the rational upper boundary. The study also shows the very simple network examples to help the concept of the suggested path generation algorithm.

• Journal of Korean Tunnelling and Underground Space Association
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• v.3 no.3
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• pp.15-29
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• 2001

For the pertinent use of NMT method, both characteristics of joints (JRC, JCS and ${\phi}_r$) and characteristics of rock mass (Q-Value) must be investigated carefully. The main objective of the study presented is to investigate how sensitive the predicted behaviour of an underground excavation is to various realistic assumptions about some input parameter for the jointed rock mass. Joint pattern in the tunnel is predicted by statistical approach (chi-square test). In this paper, sensitivity studies involving in joint characteristics were carried out. The parametric studies involving change in Barton-Bandis joint model have shown that JCS is relatively insensitive to JRC and ${\phi}_r$. An increase in JRC value may not, according to the Barton-Bandis model, necessarily lead to a decrease in displacement. The importance of dilation in predicting the behaviour of a rock mass around an excavation is emphasized from a comparison of the Barton-Bandis joint behaviour model with the Mohr-Coulomb model. The Barton-Bandis model predicted higher stress, which allow for the build-up of stress caused by dilatant behaviour.

• Korean journal of communication and information
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• v.50
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• pp.5-28
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• 2010

The theoretical scope of the public sphere has been dramatically expanded as a result of new academic inquiries into the nature of the political and the public in contemporary societies. While appreciating the value of the concept of the public sphere for understanding democratic roles of the media, scholars began to raise questions on Habermasians' exclusive focus on news and public affairs programs, arguing that various entertainment programs also can invoke political deliberation. Terms like affective public sphere, emotional public sphere, aesthetic public sphere, expressive public sphere were used to capture this new conception. To comprehend the theoretical and practical implications of the conceptual expansion of the public sphere for media studies, this study attempted to provide a typology of media-public sphere relationships. By using public-private and rational-emotional axes as two criteria for classification, we created four prototypes of the public sphere (i.e., political public sphere, populism, difference pluralism, and intimacy/privacy) and discussed the characteristics of each type. After setting out media communication as a form of meta-public sphere that mediates and coordinates the four different types of the public sphere, we presented public service broadcasting as an exemplar meta-public sphere in the contemporary society of multiple social antagonisms and differences.