• The Korean Journal of Applied Statistics
• /
• v.31 no.5
• /
• pp.599-610
• /
• 2018

The method of Mack and Skillings (Technometrics, 23, 171-177, 1981) is a nonparametric multiple comparison method in a randomized block design with replications. This method is likely to result in loss of information because each block is ranked using the average of observations instead of repeated observations. In this paper, we proposed a new nonparametric multiple comparison method in the randomized block model with replications using an alignment method proposed by Hodges and Lehmann (The Annals of Mathematical Statistics, 33, 482-497, 1962) that extend the joint placement method proposed by Chung and Kim (Communications for Statistical Applications and Methods, 14, 551-560, 2007). In addition, Monte Carlo simulation compared the family wise error rate and power with the parametric method and the nonparametric method.

• Journal of the Korea Institute of Building Construction
• /
• v.1 no.2
• /
• pp.191-195
• /
• 2001

When top down method is used, it could be a construction method trouble in column joint, between the former concrete and the latter. It could bring a void and weak concrete in column. The purpose of this study is finding a way to prevent concrete void and concrete suitable for top down , through V-metering for top down column and concrete experiment. To minimize the void of reverse placement joint, It is more effect to use the sheath method then direct method in concrete placement.

• ETRI Journal
• /
• v.32 no.6
• /
• pp.932-939
• /
• 2010

In this paper, a fast migration method is proposed. Our method executes local relocation on a model placement where an additional module is added to it for modification with a minimum number of displacements. This method is based on mean-field annealing (MFA), which produces a solution as reliable as a previously used method called simulated annealing. The proposed method requires substantially less time and hardware, and it is less sensitive to the initial and final temperatures. In addition, the solution runtime is mostly independent of the size and complexity of the input model placement. Our proposed MFA algorithm is optimized by enabling module rotation inside an energy function called permissible distances preservation energy. This, in turn, allows more options in moving the engaged modules. Finally, a three-phase cooling process governs the convergence of problem variables called neurons or spins.

• Journal of Korean Physical Therapy Science
• /
• v.4 no.2
• /
• pp.399-403
• /
• 1997

The purpose of this study was to determine the efficacy of electrode placement on procaine iontophoresis. Thirty-three healthy students with an age range of 19 to 34 years, were participated in this study. The subjects were randomly assigned into 3 groups. Each subjects received iontophoresis on the proximal 1/3 of volar surface of dominant forearm with soft cotton pad($3.5{\times}3.5cm$) soaked in 2 ml of 4% procaine hydrochloride (pH 5.1) at 4 mA for 10 minutes(total current 40 mA min) of anodal DC. In transversal electrode placement(TEP) group, dispersive electrode was placed on the proximal 1/3 of dorsal surface of the forearm. In longitudinal electrode placement (LEP) group and control group, dispersive electrode were placed on the distal 1/3 of volar surface of the forearm. After procaine iontophoresis, duration of anesthesia were evaluated at five minutes intervals on five random locations in the iontophoretically area using a 21-gauge sterile hypodermic needle pressed with 1 mm invagination until return the sharp pin-pricking pain sensation. The data were ana lysed with one-way ANOVA to determine signific~nt differences between groups. The results showed significantly differences in the local anesthetic duration between the 3 groups(p<0.001). The anesthetic durations of TEP group and LEP group were significantly longer when compared with control group(p<0.05). Anesthetic durations of TEP group and LEP group were not significantly difference, but anesthetic duration of LEP group tends to longer than TEP group. In view of these results, clinicians should consider the electrode placement method when performing the iontophoresis.

• The Transactions of the Korea Information Processing Society
• /
• v.4 no.12
• /
• pp.2971-2984
• /
• 1997

In this paper, we propose an efficient video block Placement scheme that utilize the current disk product that has MZR disk characteristic and users' skewed access pattern on VOD. Also, we evaluate its performance through simulation and modeling of VOD server. The basic placement rule is to place on MZR disks by LP, SHP methods according to the Zipf distribution of popularity. To verify the proposed scheme, we examined its performance on workstation with 2 MZR disks under varied skewed factors. The proposed placement scheme showed better response time than the random method. To extend proposed placement scheme to disk group, we analyzed the theoretical maximum numbers of concurrent users and the required buffer size per user. For performance parameters for the proposed scheme, we considered the disk head scheduling methods, the placement methods and the striping unit. The result of experiments showed that the proposed scheme was effective.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
• /
• 2014.10a
• /
• pp.347-348
• /
• 2014

In this paper, we describe the methods for quantitative evaluation of placement of aids to navigations (AtoN). AtoN is the additive devices for navigation that inform navigators using human vision and guide navigators to safe watercourse. Therefore the effectiveness of placement of AtoN can be quantified according to the grade of visibile recognition to navigators. In order words, the placement of AtoN can be quantified in the sense of visibility. In this study, we describe the methods for quantifying the visibility about the placement of AtoN. Using AtoN simulator which has been developed by Korea Research Institute of Ships and Ocean Engineering (KRISO), the quantitative method is investigated for the pre-installed placement of AtoNs.

• Smart Structures and Systems
• /
• v.20 no.6
• /
• pp.769-780
• /
• 2017

Cable force monitoring is an essential and critical part of the safety evaluation of cable-supported bridges. A reasonable cable force monitoring scheme, particularly, sensor placement related to accurate safety assessment and budget cost-saving becomes a major concern of bridge administrative authorities. This paper presents optimal sensor placement for cable force monitoring by selecting representative sensor positions, which consider the spatial correlativeness existing in the cable group. The limited sensors would be utilized for maximizing useful information from the monitored bridges. The maximum information coefficient (MIC), mutual information (MI) based kernel density estimation, as well as Pearson coefficients, were all employed to detect potential spatial correlation in the cable group. Compared with the Pearson coefficient and MIC, the mutual information is more suitable for identifying the association existing in cable group and thus, is selected to describe the spatial relevance in this study. Then, the bond energy algorithm, which collects clusters based on the relationship of surrounding elements, is used for the optimal placement of cable sensors. Several optimal placement strategies are discussed with different correlation thresholds for the cable group of Nanjing No.3 Yangtze River Bridge, verifying the effectiveness of the proposed method.

• Journal of Practical Engineering Education
• /
• v.8 no.2
• /
• pp.129-136
• /
• 2016

In addition to the quantitative growth of domestic field placement, there is a growing interest in global field placement and participation of government and universities is increasing. The global field experience of university students provides students with advanced skills and experience of overseas companies as well as opportunities to acquire foreign language ability and global culture suitable for industrial needs that require global competence. Students can cultivate global mind and major practical skills so that it has the advantage of linking to overseas employment. In order to be successful global field placement, the university has to promote to participate in the company including the curriculum related to the student's major and provide comprehensive support including student safety, but the resources of the university are only limited. In this paper, we propose a method to activate global field placement in cooperation with local partner universities based on Kumoh Institute of Technology case study.

• Structural Monitoring and Maintenance
• /
• v.4 no.1
• /
• pp.53-68
• /
• 2017

The response sensitivity method in time domain has been applied extensively for damage identification. In this paper, the relationship between the error of damage identification and the sensitivity matrix is investigated through perturbation analysis. An index is defined according to the perturbation amplify effect and an optimal sensor placement method is proposed based on the minimization of that index. A sequential sub-optimal algorithm is presented which results in consistently good location selection. Numerical simulations with a two-dimensional high truss structure are conducted to validate the proposed method. Results reveal that the damage identification using the optimal sensor placement determined by the proposed method can identify multiple damages of the structure more accurately.

• Journal of Institute of Control, Robotics and Systems
• /
• v.13 no.6
• /
• pp.574-580
• /
• 2007

This paper deals with LQR controller design method tor system having complex poles. The proposed method is capable of systematically calculating weighting matrices based on the pole's moving-range and the relational equation between closed-loop pole(s) and weighting matrices. The method moves complex poles to complex poles or two distinct real poles. This will provide much-needed functionality to apply LQR controller. The example shows the feasibility of the proposed method.