• Journal of Korean Society of Industrial and Systems Engineering
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• v.13 no.21
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• pp.1-6
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• 1990

The paper analyzes how an agency problem in one industry affects the nature of equilibrium in another related industry facing potential entry. It is shown that, under certain situation, the incumbent allows for entry and charges a higher price than that without the agency problem. And the incumbent can reap more profits as a result of entry. The socially optimal price may be higher than, equal to or lower than the price the incumbent charges.

• Journal of the Korea Institute of Military Science and Technology
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• v.25 no.2
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• pp.117-124
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• 2022

Single-ring circular array antennas can be applied to direction finding systems in order to use nose-section in other purposes, and the interferometry is a proper direction finding method to those systems. We usually make the interferometer baseline long enough to achieve good angular accuracy. However, an interferometer with baseline longer than a half-wavelength has the ambiguity problem. In this paper, we present a novel method for solving the ambiguity problem in interferometry systems. This technique is based on the amplitude comparison method and the space division table, and it can place a target within the angular region in which the ambiguity problem does not occur by roughly estimating direction-of-arrival. The Monte Carlo simulation results show that proposed method can effectively remove the ambiguity problem in the system.

• Management & Information Systems Review
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• v.34 no.2
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• pp.193-206
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• 2015

The purposes of this paper are to investigate the impact of managers' agency problem on asymmetrical behavior of SG&C and to examines whether or not the corporate governance mechanisms can have any moderating effects on Asymmetrical behavior of SG&C. To test empirically the above mentioned purposes, we gathered firm-year data of manufacturing firms from 2007 to 2012 and the sample firms are listed on the Korean Stock Exchange. The findings of this research are summarized as follows: Firstly, for those firms whose agency problems are high, the stickiness of SG&A increases as sales variation. The results imply that managers are not willing to reduce their perquisite consumption in proportion with sales reduction. Secondly, we investigate how corporate governance mechanisms influence the cost stickiness behaviors of SG&A for those firms whose agency problem are high(above the median value of free cash flow used as a proxy of agency problem). The results are that as the effectiveness of corporate governance mechanisms improve the cost stickiness of SG&A mitigation except for the insider ownership. These results show that agency problem has impact on the asymmetrical behavior of SG&A. And effective governance mechanisms have moderate effects on the reducing stickiness behavior of SG&A caused by agency problem.

• Journal of Positioning, Navigation, and Timing
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• v.4 no.4
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• pp.181-186
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• 2015

A High-degree Cubature Kalman Filter (CKF) is proposed to deal with the Strapdown Inertial Navigation System (SDINS) alignment problem. In-flight Alignment (IFA) is an effective method to compensate for attitude errors of the navigation system. While providing precise attitude error compensation, however, the external source aided alignment often creates a nonlinear filtering problem caused by a large misalignment angle. Introduced recently, Cubature Kalman Filter is a suitable technique for various nonlinear problems. In this paper, a higher degree CKF is applied to this accuracy-is-everything SDINS IFA problem. The simulation results show that the proposed technique outperformed a traditional nonlinear filter in terms of precision and alignment time.

• International Journal of Contents
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• v.10 no.1
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• pp.12-17
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• 2014

This paper will explore the problem of domestic violence in the UK. It will begin by defining the problem and then set out estimates of the extent of the problem, while also examining the problems that are involved in measurement. It will then examine the policing strategies that have been put in place to tackle this problem, such as intelligence gathering, effective investigations, and risk management techniques. The paper will also highlight the importance of multi-agency involvement when dealing with domestic violence and the wide range of orders that have been created in order to help deal with this problem.

• The Korean Journal of Rehabilitation Nursing
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• v.3 no.1
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• pp.15-26
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• 2000

This study examined the relationship between the level of hardiness and self-care agency of persons with a colostomy. The purpose of the study was to explore the effect of hardiness on self-care agency of persons with a colostomy and to identity factors influencing on. The ultimate goal was to help nurses improve the person's self-care agency and to contribute theoretical base for the planning of supportive nursing interventions to increase the level of self care. The subjects for the study consisted of 43 persons aged above eighteen below seventy had had Miles operation and permanent colostomy. The data were collected from July, 1998 to September 15, 1998. The instruments used for this study were the Health-Related Hardiness (Pollock, 1984) and the Self-carer As Inventory Scale(Genden & Taylor, 1988). The Self-Carer As Inventory translated by So Hyang-sook and was modified by author of this study. The data were analysed by using SAS computerlized program and included number, percentage, t-test, ANOVA and Pearson Correlation Coefficient. The results of the study are summarized as follows. 1. Hardiness was significantly related to Self-care agency(r=-0.531. p=0.0002). That is, the higher the hardiness, the higher the level of Self-care agency. 2. In the relationship between general characteristics and traits of persons with a colostomy and hardiness were significant difference in monthly income (F=2.79, p=0.03), problem in stoma management (F=3.29, p=0.01). 3. In the relationship between general characteristics and traits of persons with a colostomy and Self-care agency were significant difference in monthly income (F=2.93, p=0.03), problem in stoma management(F=2.93, p=0.01). Therefore, in order to increase the level of Self-care agency of ostomate Nurses should be helpful to provide them with hardiness training to strengthen their control, commitment and challenge(subconcepts of hardiness).

• Journal of Institute of Control, Robotics and Systems
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• v.19 no.11
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• pp.998-1003
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• 2013

This study proposes an adaptive control algorithm for lateral motion of a UGV (Unmanned Ground Vehicle) using an NN (Neural Networks). The lateral motion of the UGV can be corrupted with various uncertainties such as side slip. In order to compensate the performance degradation of the UGV under various uncertainties, an NN-based adaptive control is designed by utilizing a virtual control concept. Since both the drift and input gain terms are uncertain, the proposed method adapts the whole terms related to the difference between the nominal and real systems. To avoid a singularity problem with the adaptive control, the affine property of the UGV dynamic model is utilized and the overall closed-loop stability is analyzed rigorously. Finally, numerical simulations using Carsim are performed to validate the effectiveness of the proposed scheme.

• Journal of Agricultural Extension & Community Development
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• v.18 no.4
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• pp.879-902
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• 2011

This study was conducted to investigate the levels of hope and their relationship with problem behavior, academic records and procrastination among rural adolescents. The participants were 579 rural middle and high school students from three counties. The major results of the study were as follows. First, pathway and agency thinking of rural adolescents were negatively correlated with depression and anxiety, and were positively correlated with academic records and procrastination. But only agency thinking of rural adolescents were negatively correlated with delinquency among problem behaviors. Second, as a result of multivariate analysis of variance, groups of high hope of rural adolescents were lower in depression and anxiety than groups of low hope, but were higher in academic records and procrastination.

• Journal of the Institute of Electronics and Information Engineers
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• v.52 no.4
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• pp.184-193
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• 2015

Passive Surveillance System based on the TDOA detects the emitter position in the air using TOA of pulses comprising emitter signal from multiple receivers. In case that PRI of pulses from the emitter is not enough big in comparison with the distance among receivers, it causes the ambiguity problem in selecting proper pulse pairs for TDOA emitter geolocation. In this paper, a novel ambiguity resolution method of radar pulses is presented by using genetic algorithm after changing ambiguity problem into optimization problem between TDOA of received pulses from each receiver and emitter position. Simulation results are presented to show the performance of the proposed method.

• Journal of Magnetics
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• v.20 no.1
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• pp.62-68
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• 2015

This paper presents an experimental technique to accurately separate a permanent magnetic field and an induced one from the total magnetic fields generated by a steel ship, through compensating for the Earth's magnetic field. To achieve this, an Earth's magnetic field simulator was constructed at a non-magnetic laboratory, and the field separation technique was developed, which consisted of five stages. The proposed method was tested with a scaled model ship, and its permanent and induced magnetic fields were successfully extracted from the magnetic field created by the ship. Finally, based on the separated permanent magnetic field data, the permanent magnetization distribution on the hull was predicted by solving an inverse problem. Accordingly, the permanent magnetic fields generated by the ship can easily be calculated at any depth of water.