• Journal of the Korea Society of Computer and Information
• /
• v.26 no.6
• /
• pp.29-35
• /
• 2021

In this paper, we propose a method that combines KNN(K-Nearest Neighbor), Local Map Classification and Bayes Filter as a way to increase the accuracy of location positioning. First, in this technique, Local Map Classification divides the actual map into several clusters, and then classifies the clusters by KNN. And posterior probability is calculated through the probability of each cluster acquired by Bayes Filter. With this posterior probability, the cluster where the robot is located is searched. For performance evaluation, the results of location positioning obtained by applying KNN, Local Map Classification, and Bayes Filter were analyzed. As a result of the analysis, it was confirmed that even if the RSSI signal changes, the location information is fixed to one cluster, and the accuracy of location positioning increases.

• The Journal of Korea Robotics Society
• /
• v.8 no.3
• /
• pp.206-216
• /
• 2013

We investigate the role of contact location information on the perception of local features during contour following in a virtual environment. An absolute identification experiment is conducted under force-alone and force-plus-contact-location conditions to investigate the effect of the contact location information. The results show that the participants identify the local features significantly better in terms of higher information transfer for the force-plus-contact-location condition, while no significant difference was found for measures of the efficacy of contour following between the two conditions. Further data analyses indicate that the improved identification of local features with contact location information is due to the improved identification of small surface features.

• Journal of Institute of Control, Robotics and Systems
• /
• v.14 no.8
• /
• pp.760-766
• /
• 2008

This paper proposes an efficient location technique to find an indoor location under the IEEE 802.11 wireless local area networks. The proposed method is based on the range measurements obtained from a simple radio frequency propagation model. Thus, unlike the radio frequency fingerprint correlation method, it does not suffer from the computational burden during the real-time location service period and can quickly reply the location requests of many users at the same time. To increase the location accuracy in spite of the frequent non-line-of-sight error occurrences, the proposed method calibrates the distortion of the non-line-of-sight error by a simple measurement surveying procedure that does not require the surveyor's manual interaction. Experimental results show the capability of the proposed method.

• The Transactions of The Korean Institute of Electrical Engineers
• /
• v.61 no.3
• /
• pp.373-379
• /
• 2012

This paper presents a fault location algorithm based on the adaptively estimated value of the local sequence source impedance for faults on a parallel transmission line. This algorithm uses only the local voltage and current signals of a faulted circuit. The remote current signals and the zero-sequence current of the healthy adjacent circuit are calculated by using the current distribution factors together with the local terminal currents of the faulted circuit. The current distribution factors consist of local equivalent source impedance and the others such as fault distance, line impedance and remote equivalent source impedance. It means that the values of the current distribution factors can change according to the operation condition of a power system. Consequently, the accuracy of the fault location algorithm is affected by the two values of equivalent source impedances, one is local source impedance and the other is remote source impedance. Nevertheless, only the local equivalent impedance can be estimated in this paper. A series of test results using EMTP simulation data show the effectiveness of the proposed algorithm. The proposed algorithm is valid for a double-circuit transmission line system where the equivalent source impedance changes continuously.

• Journal of the Korea Society for Simulation
• /
• v.19 no.2
• /
• pp.137-145
• /
• 2010

This study presents an RTS(Real-time Traffic System) based on an LBS(Location Based Service) using 5.8~5.9GHz RSU(Road Side Unit). The proposed LBI(Location based Broadcast system on ITS) is a local information-based service supported by RSU for drivers, which has a feature of convergence between T-DMB system and ITS-based RTS. The convergence of local broadcasting station and ITS is realized by two-way communication and supports LBS(Location Based Service) by identifying of vehicle's location using RSU. Real-time information delivery and various services could be provided by information exchanges between LMM and local broadcasting stations. Furthermore, conventional technical limitations have been solved mutually such as transmission area limitation in RTS and one-way communication problem in T-DMB. This support real-time two-way communication to each driver. Therefore, it can be expected that traffic dispersion effects and services expansion for drivers by RTS and LBI. Finally, it is proposed to built and implement test-bed around institute.

• Journal of environmental and Sanitary engineering
• /
• v.19 no.1
• /
• pp.24-36
• /
• 2004

This study is to investigate the present condition of waste disposal establishment and to analysis problems which could be produced at location selection formalities of waste disposal establishment. It proposed building methods of waste disposal establishment to lead spontaneous participation of local resident according to case analysis of waste disposal establishment. There are research results; i) Opposition of inhabitants was the majority of reason at the business abandonment or delay of waste disposal establishment. Therefore agreement formation course with local inhabitants is most important position. ii) Many estimate have been needed for waste disposal establishment, but support estimate of government was 30-50% that is really low compare with other environmental establishment. So that it need to increase of government estimate. iii) Location collection is carried out based on law and final collected location must be executed without delay of relation business as soon as possible. iv) Standard of location collection has to divide into small, middle and large size and to apply with same rule according to divided location. v) It must be change public subscription before and location selection after and maintain continuance of information offer to local inhabitants and offered information. vi) after building of waste disposal establishment for solving distrust of waste disposal establishment. It must be planed and carried on useful support countermeasure to local inhabitants in actuality.

• Journal of the Korean Institute of Rural Architecture
• /
• v.21 no.2
• /
• pp.11-18
• /
• 2019

This study aims to identify the actual condition of local food stores that serve as a regional activation space within the highway rest area. It analyzes and examines user awareness, and presents desirable directions for the establishment of new local food stores and improvement of existing facilities. The research method was conducted as follows: the status of 226 rest areas were examined which were installed on national highways, location conditions and convenience facilities. Second, a physical survey was conducted on 116 local food stores(floor area, location) and a user awareness survey on 63 local food stores. The results of the analysis and review have been concluded as follows. First, it is necessary to consider the establishment of a local food store in order to promote the local community by using various cultural and environmental conditions in the highway rest area, and to secure a public space to promote exchanges with local residents and revitalize the local economy. Second, considering the continuous increase of highway users, location, and traffic conditions, diversification of convenience functions including local food stores should be considered even if it is a medium and small highway rest area. Third, the floor area of local food stores is generally planned within a range of $75m^2$ to $125m^2$, and its location should be integrated with the rest area as much as possible. Inevitably, when you need to construct separately at the exit or entrance, you need to consider a unique design that ensures accessibility and visibility.

• Journal of the Korean Institute of Rural Architecture
• /
• v.1 no.2
• /
• pp.119-131
• /
• 1999

College is a component of local community, which is not separated from the community, seeks the local development through the extension of opportunity for the local students to enter higher schools, improvement of local culture and environment, extension of production education, research on local community, supply of side job manpower and lecture attendance system and affects the local community with the increase of young population. It is found that after the College is founded in the research area, the whole image of physical and psychological evolution of College according to the change factors like the change of use of neighboring regions and business items is relatively active, has the connection to the region and shows the strong continuous image. Accordingly, College must seek the mutually organic relationship which local community and be a foundation for the local development by leading to the formation of neighboring region around campus.

• Journal of Distribution Science
• /
• v.16 no.9
• /
• pp.35-41
• /
• 2018

Purpose - The purpose of was paper is to do a conceptual analysis of the determination of local superior commodities using the location quotient technique and an analysis of the contribution of superior products to the regional economy. The results of determining superior commodities are used to determine regional product specialization and its contribution to the regional economy. Local superior commodities are dynamic and selected based on the potential to increase regional income. Research design, data, and methodology - This study used location quotient techniques and regional economic analysis with annual data rocks, production data in the agriculture, plantation, fishery and forestry sectors. Local superior commodities are calculated to contribute to regional economists. Result - The findings obtained showed the location quotient technique can determine local superior commodities and local superior commodities contributed positively to the regional economy. The test results were carried out in Jember Regency, East Java Province, Indonesia. Conclusion - The ass well main commodities of Jember Regency are tobacco. Tobacco commodities contribute positively to the regional economy, they were not significantly due to affected by the low of commodity prices in harvest. The low prices indicate the strength of the weak bargaining position of farmers towards the market.

• Journal of the Korean Society of Safety
• /
• v.20 no.1 s.69
• /
• pp.55-61
• /
• 2005

The purpose of this study is to investigate the effect of circumferential location of local wall thinning defect on the collapse behavior of an elbow. Thus, the present study conducts three-dimensional finite element analysis on the 90-degree elbow containing a local wall thinning at intrados, crown and extrados of bend region and evaluates the collapse moment of wall thinned elbow under various thinning shapes and loading conditions. Combined internal pressure and bending moment are considered as an applied load. The internal pressure of $0\~20MPa$ and both closing and opening mode bending are employed. The results of analysis show that the reduction in collapse moment of the elbow by local wall thinning is more significant for a defect locating at crown than for a defect locating at intrados or at extrados. Also, the effect of internal pressure on the collapse moment of wall thinned elbow depends on the circumferential location of thinning defect and applied bending mode.