• Journal of the Economic Geographical Society of Korea
• /
• v.14 no.3
• /
• pp.437-451
• /
• 2011

The purpose of this study is to identify the factors that influence commuting patterns of Seoul residents after the construction of new towns. To find the determinants of commuting time for residents with jobs in Seoul, a multiple regression analysis is performed using household survey data. Overall, the findings present a plausible picture of the spatial configuration in Seoul, where younger residents with growing families move out to the suburbs to become owners of apartment homes, and drive or use mass transportation to get to work. As they get older and wealthier, other things being equal, they gravitate towards the city centre in order to reduce the time wasted on commuting. While their occupations appear to play little role, it seems that the entrapment hypothesis on female workers is supported as well. In addition, excess commuting is still prevalent due to jobs-housing mismatch in Seoul, although it is less severe than in the past. Based on these results, planners should devise better strategies to solve the inefficient commuting problem.

• The KIPS Transactions:PartD
• /
• v.9D no.2
• /
• pp.215-226
• /
• 2002

Considering the rapid process of media's breakthrough and diverse patterns of consumptions's analysis, a uniform analysis might be much rooms to be desired for interpretation of new phenomena. In special, the products happening intensive sails on around an anniversary or fresh food have the restricted marketing hours. Moreover, traditional association rule discovery algorithms might not be appropriate for analysis of sales pattern given in a specific time because existing approaches require iterative scan operation to find association rule in large scale transaction databases. in this paper, we propose an incremental candidate set management model based on twin-hashing technique to find association rule in special sales pattern using database trigger and stored procedure. We also prove performance of the proposed model through implementation and experiment.

• Journal of the Institute of Electronics Engineers of Korea SD
• /
• v.46 no.5
• /
• pp.1-8
• /
• 2009

Since scan based testing is very efficient and widely used for testing large sequential circuits. However, since test patterns are serially injected through long scan chains, scan based testing requires very long test application time. Also, compared to the normal operations, scan shifting operations drastically increase power consumption. In order to solve these problems, this paper presents a new scan architecture for both test application time and test power reduction. The proposed scan architecture partitions scan chains into several segments and bypasses some segments which do not include any specified bit. Since bypassed segments are excluded from the scan shifting operation, the test application time and test power can be significantly reduced.

• The Journal of the Korea institute of electronic communication sciences
• /
• v.13 no.1
• /
• pp.199-206
• /
• 2018

This study was to investigate the Influence of smart phone use on gait in healthy adults. Twenty healthy adults were recruited in this study. All subjects performed twice for each normal gait and smart phone gait. The normal gait walked at their chosen speed, and the smart phone gait walked while watching the video. GAITRite system was used to identify the temporal and spatial variables related to the gait pattern during walking. Statistical analysis was analyzed by paired t-test. In comparison of temporal variables, smart phone gait was significantly lower in gait speed and cadence than in normal gait(p<.05), and was significantly longer in single support time and double support time(p<.05). In comparison of spatial variables, smart phone gait was significantly shorter in step length and stride length than in normal gait(p<.05) and significantly longer in step width(p<.05). The results of this study demonstrated that smartphone use can negatively affect the correct gait patterns during walking.

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.26 no.1
• /
• pp.162-169
• /
• 2022

In a dynamically changing time-varying network environment, the optimal moving pattern of edge devices can be applied to distributing computing resources to edge cloud servers or deploying new edge servers in the FEC(Fog/Edge Computing) environment. In addition, this can be used to build an environment capable of efficient computation offloading to alleviate latency problems, which are disadvantages of cloud computing. This paper proposes an algorithm to extract the optimal moving pattern by analyzing the moving path of multiple edge devices requiring application services in an arbitrary spatio-temporal environment based on frequency. A comparative experiment with A^* and Dijkstra algorithms shows that the proposed algorithm uses a relatively fast execution time and less memory, and extracts a more accurate optimal path. Furthermore, it was deduced from the comparison result with the A^* algorithm that applying weights (preference, congestion, etc.) simultaneously with frequency can increase path extraction accuracy.

• The KIPS Transactions:PartB
• /
• v.13B no.2 s.105
• /
• pp.127-132
• /
• 2006

K-NN (k-Nearest Neighbors), which is a well-known instance-based learning algorithm, simply stores entire training patterns in memory, and uses a distance function to classify a test pattern. K-NN is proven to show satisfactory performance, but it is notorious formemory usage and lengthy computation. Various studies have been found in the literature in order to minimize memory usage and computation time, and NGE (Nested Generalized Exemplar) theory is one of them. In this paper, we propose RPA (Recursive Partition Averaging) and IRPA (Incremental RPA) which is an incremental version of RPA. RPA partitions the entire pattern space recursively, and generates representatives from each partition. Also, due to the fact that RPA is prone to produce excessive number of partitions as the number of features in a pattern increases, we present IRPA which reduces the number of representative patterns by processing the training set in an incremental manner. Our proposed methods have been successfully shown to exhibit comparable performance to k-NN with a lot less number of patterns and better result than EACH system which implements the NGE theory.

• Proceedings of the Korean Society of Broadcast Engineers Conference
• /
• 2016.06a
• /
• pp.384-387
• /
• 2016

본 논문에서는 4K UHD 방송장비 중 디스플레이기기와 인코더의 성능 시험을 위해 개발된 패턴 발생장비를 소개하고 있다. 패턴의 제작 및 재생 방법에 따라 표출되는 패턴의 종류를 그래픽/실사, 정지/동영상으로 구분할 수 있는데 본 논문에서는 모션블러, 모션져더, AV lip sync, 텍스트 주변 인코딩 화질 열화 확인, 화이트 노이즈, 프레임 누락, HDR 확인, 지연시간 측정, 계단현상 확인, 이미지 스티킹 등 그래픽 동영상 패턴에 대해 각각의 제작 의도를 설명하고 이를 통해 디스플레이기기와 인코더의 성능을 평가하는 방법에 대한 간략한 소개와 개발된 패턴발생장비의 입출력 사양을 제시하고 있다.

• Smart Media Journal
• /
• v.9 no.2
• /
• pp.33-38
• /
• 2020

Order preserving matching refers to the problem of reporting substrings of a given text where there exists order isomorphism with the pattern. In this paper, we propose a new algorithm based on filtering and evaluation. The proposed algorithm is simple and easy to implement, and runs in linear time on average. Experimental results show that it works efficiently with real world data.

• Journal of Korea Game Society
• /
• v.4 no.3
• /
• pp.43-47
• /
• 2004

Fast games such as first person shooting games and action games gives notiming surplus to analyze both states of enemys and my status normally. Behavioral of enemy characters in these games are generally produced by patterns. However It was weekpoints of exposure of patterns when gamers try many times. In this paper, we study the new patterns of enemy characters after analysing patterns of gamers

• Annual Conference of KIPS
• /
• 2001.10a
• /
• pp.335-338
• /
• 2001

디자인패턴은 디자인 경험을 표현하기 위한 새로운 메커니즘으로 미래의 유사 상황에서 다시 적용될 수 있는 과거에 잘 정의된 설계에 대한 정보를 기록하는 것이며 소프트웨어 개발 설계에서 재사용성을 증가시킨다. 그러나 광범위한 관심과 활용에도 불구하고, 패턴명세와 활용은 주로 개발자의 수작업을 통해 이루어지기 때문에 일관된 형태의 분석과 활용이 어렵다. 이로 인해 오류 발생 빈도를 높일 뿐 아니라 프로그램 개발이 어렵고 많은 시간을 필요로 한다. 따라서 본 논문에서는 디자인패턴을 구조화된 전자문서로 표현하기 위한 XML 표기방법과 디자인패턴 활용시스템 구조를 제시한다. 또한 이러한 표기법과 활용구조를 통해 소스코드 자동생성 지원 시스템을 제시하고, 적용 예를 보이고자한다. XML을 이용한 구조화된 문서활용은 소스코드 생성시 사용자들에게 더 작은 코드를 작성하게 만들고, 더 안정된 시스템을 구축한 수 있게 한다. 또한 XML의 다양한 기술에 접목함으로써 패턴 활용을 극대화할 수 있다.