• 한국정보통신학회논문지
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• 제7권8호
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• pp.1674-1683
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• 2003

Markovian 신호의 간섭(interruption)하에서 Stop­-and-­Wait ARQ protocol을 적용한 패킷 데이터 다중화기의 성능을 분석한다. 시스템 모델을 살펴보면 입력 프로세스는 Poisson 프로세스로, 출력 채널은 연속되는 시간 슬롯(slot)으로 분할되고 데이터 패킷은 이 슬롯 시간 동안에 전송된다. 이 시스템에서, 프레임 시간은 왕복 지연 시간으로 정의되었다. 이 모델에서 출력 채널은 Markovian 간섭에 의해 데이타 전송이 중단되는 blocking state와 간섭이 없는 non-­blocking state로 구분된다. Markovian 간섭신호를 고려하면서, 2개의 연속적인 프레임이나 slot사이에 버퍼 상태에 관한 관계식을 고려하여 전체적인 시스템이 분석되었다. 분석된 자료 값이 시뮬레이션과 비교적 잘 일치함을 확인하였다.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 2011년도 정기 학술대회
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• pp.324-327
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• 2011

The design requirement for ground mounted sign structures are fairly well defined in the AASHTO Standard Specifications for Structural Supports for Highway Signs, Luminaries, and Traffic Signals and consists of applying an equivalent pseudo-dynamic loading to account for the dynamic effects of wind loads and ignores the dynamic effect due to moving vehicle loads. This design approach, however, should not be applied to the design of bridge mounted sign structures because ignoring the dynamic effects of the moving vehicle loads may produce non-conservative results, since the stiffness of the bridge structure can greatly influence the behavior. Not enough information is available in the literatures which provide guide lines to include the influence of moving vehicles in the design of the bridge mounted sign structures. This paper describes a theoretical methodology, Bridge-Vehicle Interaction Element, which can be utilized to account for the dynamic effect of moving vehicles. A case study is also included where this methodology was successfully applied. It was concluded that the bridge-vehicle interaction finite element developed can provide a more accurate representation of the behavior of bridge mounted sign structures. The result of these analysis enabled development of simple and effective retrofitting scheme for the existing support system of bridge-mounted-structure.

• 아태비즈니스연구
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• 제11권1호
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• pp.1-16
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• 2020

Purpose - The purpose of this research is to investigate the determinants of bakery revisit intention. This research selects Paris Baguette as the research context because the market share of Paris Baguette was the highest in Korean bakery market. Design/methodology/approach -This research employed revisit intention as the dependent variable, while this research chooses six attributes to account for revisit intention. Six attributes are price fairness, taste, product variety, accessibility, display, and membership. This research uses survey as the main instrument. For the data collection, online survey using Google survey form was implemented. The survey participants are domestic consumers of Paris Baguette. The number of observation is 245. For the data analysis, this study used frequency analysis, correlation matrix, exploratory factor analysis, reliability analysis, and multiple regression model. There are four control variables, which contains age, gender, visiting frequency, and monthly income. Findings - The results shows that price fairness, taste, product diversity, and accessibility are significant attributes with the positive effect. Among the significant attributes, taste presented the highest magnitude to explain the revisit intention. However, membership and display appeared as non-significant attributes to account for bakery revisit intention. Research implications or Originality - This study provides the bakery managers with the information to design their service and product. This study also contributes to the literature by understanding the consumer behavior more in the domain of bakery service.

• Steel and Composite Structures
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• 제18권2호
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• pp.375-394
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• 2015

This paper presents the results of four long-term experiments carried out to investigate the time-dependent behaviour of composite floor slabs with particular attention devoted to the development of non-uniform shrinkage through the slab thickness. This is produced by the presence of the steel deck which prevents moisture egress to occur from the underside of the slab. To observe the influence of different drying conditions on the development of shrinkage, the four 3.3 m long specimens consisted of two composite slabs cast on Stramit Condeck $HP^{(R)}$ steel deck and two reinforced concrete slabs, with the latter ones having both faces exposed for drying. During the long-term tests, the samples were maintained in a simply-supported configuration subjected to their own self-weight, creep and shrinkage for four months. Separate concrete samples were prepared and used to measure the development of shrinkage through the slab thickness over time for different drying conditions. A theoretical model was used to predict the time-dependent behaviour of the composite and reinforced concrete slabs. This approach was able to account for the occurrence of non-uniform shrinkage and comparisons between numerical results and experimental measurements showed good agreement. This work highlights the importance of considering the shrinkage gradient in predicting shrinkage deformations of composite slabs. Further comparisons with experimental results are required to properly validate the adequacy of the proposed approach for its use in routine design.

• 정보관리학회지
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• 제11권2호
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• pp.49-66
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• 1994

본 연구는 도서관에서의 비도서자료의 활용과 비도서자료에 대한 사서들의 인식 및 의견을 조사하였다. 설문지를 사용하여 129개의 데이터를 한국사회과학정보자료기관협의회의 31개 회원도서관과 98명의 사서로부터 수집하여 분석하였다. 분석결과, 도서관에서의 비도서자료의 활용은 매우 중요하다는 것이 밝혀졌다. 따라서 비도서자료의 활용은 좀더 활성화하기 위한 서지통정을 제안하였다.

• 한국언어정보학회지:언어와정보
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• 제3권2호
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• pp.13-30
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• 1999

There have been two opposing views on the structure of the so-called head internal relative construction(HIRC) in Korean/Japanese, i.e., a view that analyzes the HIRC categorially as a nominal projection and functionally as an argument(Kuroda 1992, Watanabe 1992, Hoshi 1996, Jhang 1991/1994, among others) vs. a view that analyzes the HIRC categorially as an adjunct clause and functionally as a non-argument(Murasugi 1994). This paper on the one hand points out several phenomena indicating that Murasugi's analysis is more viable, while on the other hand proposing a more complex structure than Murasugi's to account for other facts as well. The no/kes clause in the HIRC will be analyzed as the complement of a null perception verb whose projection constitutes part of an adjunct clause.

• 한국언어정보학회지:언어와정보
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• 제3권2호
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• pp.1-12
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• 1999

There have been two opposing views on the structure of the so-called head internal relative construction(HIRC) in Korean/Japanese, i.e., a view that analyzes the HIRC categorially as a nominal projection and functionally as an argument(Kuroda 1992, Watanabe 1992, Hoshi 1996, Jhang 1991/1994, among others) vs. a view that analyzes the HIRC categorially as an adjunct clause and functionally as a non-argument(Murasugi 1994). This paper on the one hand points out several phenomena indicating that Murasugi's analysis is more viable, while on the other hand proposing a more complex structure than Murasugi's to account for other facts as well. The no/kes clause in the HIRC will be analyzed as the complement of a null perception verb whose projection constitutes part of an adjunct clause.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제6권4호
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• pp.989-1005
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• 2012

In this paper, throughput of IEEE 802.11 carrier-sense multiple access (CSMA) with collision-avoidance (CA) protocols in non-saturated traffic conditions is presented taking into account the impact of imperfect channel sensing. The imperfect channel sensing includes both missed-detection and false alarm and their impact on the utilization of IEEE 802.11 analyzed and expressed as a closed form. To include the imperfect channel sensing at the physical layer, we modified the state transition probabilities of well-known two state Markov process model. Simulation results closely match the theoretical expressions confirming the effectiveness of the proposed model. Based on both theoretical and simulated results, the choice of the best probability detection while maintaining probability of false alarm is less than 0.5 is a key factor for maximizing utilization of IEEE 802.11.

• 대한원격탐사학회지
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• 제22권3호
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• pp.211-219
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• 2006

A random forests classifier is applied to multi-sensor data fusion for supervised land-cover classification in order to account for the importance of variable. The random forests approach is a non-parametric ensemble classifier based on CART-like trees. The distinguished feature is that the importance of variable can be estimated by randomly permuting the variable of interest in all the out-of-bag samples for each classifier. Two different multi-sensor data sets for supervised classification were used to illustrate the applicability of random forests: one with optical and polarimetric SAR data and the other with multi-temporal Radarsat-l and ENVISAT ASAR data sets. From the experimental results, the random forests approach could extract important variables or bands for land-cover discrimination and showed reasonably good performance in terms of classification accuracy.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제13권3호
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• pp.1450-1463
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• 2019

The problem towards crowd behavior recognition in a serious clustered scene is extremely challenged on account of variable scales with non-uniformity. This paper aims to propose a crowed behavior classification framework based on a transferring hybrid network blending 3D res-net with inception-v3. First, the 3D res-inception network is presented so as to learn the augmented visual feature of UCF 101. Then the target dataset is applied to fine-tune the network parameters in an attempt to classify the behavior of densely crowded scenes. Finally, a transferred entropy function is used to calculate the probability of multiple labels in accordance with these features. Experimental results show that the proposed method could greatly improve the accuracy of crowd behavior recognition and enhance the accuracy of multiple label classification.