• Journal of the Korea Institute of Military Science and Technology
• /
• v.13 no.1
• /
• pp.84-90
• /
• 2010

Korean army currently considers the development of the new generation MLRS(Multiple Launcher Rocket System) as a new alternative, which responses on the renovation of the artillery and future battlefield environment. This study suggests that it presents cost-effectiveness of MLRS based on the Analytic Hierarchy Process and Parametric Estimating(PRICE H). According to this study, the cost-effectiveness of new generation MLRS presented that alternative A is 2.30 times and alternative B is 1.70 times, which are better than currently operating M270A1. Therefore, The best acquisition is alternative A that launcher is carried on currently operating 10ton standard truck but final acquisition alternative should be politically decided to consider viability of operator, performance and the latest of equipment.

• Journal of Applied Reliability
• /
• v.18 no.3
• /
• pp.229-239
• /
• 2018

Purpose: There is a difficulty in Environmental Stress Screening (ESS) test design for weapon system's electrical/electronic components/products in small and medium-sized enterprises. To overcome this difficulty, I propose an easy ESS test design approach algorithm that is optimized with only one environment tolerance design information parameter (${\Delta}T$). Methods: To propose the mass production weapon system ESS test design for cost-effective optimization, I define an optimum cost-effective mathematical model ESS test algorithm model based on modified MIL-HDBK-344, MIL-HDBK-2164 and DTIC Technical Report 2477. Results: I clearly confirmed and obtained the quantitative data of ESS effectiveness and cost optimization along our ESS test design algorithm through the practical case. I will expect that proposed ESS test method is used for ESS process improvement activity and cost cutting of mass production weapon system manufacturing cost in small and medium-sized enterprises. Conclusion: In order to compare the effectiveness of the proposed algorithm, I compared the effectiveness of the existing ESS test and the proposed algorithm ESS test based on the existing weapon system circuit card assembly for signal processing. As a result of the comparison, it was confirmed that the test time was reduced from 573.0 minutes to 517.2minutes (9.74% less than existing test time).

• Journal of Distribution Science
• /
• v.14 no.8
• /
• pp.51-57
• /
• 2016

Purpose - If control-ownership disparity is large, managers will not actively reduce costs; rather, they will maintain unutilized resources or possess surplus resources even when sales decrease with the purpose of increasing personal utility from status, power, compensation, and prestige. These managers' utility maximizing tendencies cause cost stickiness. We examine whether asymmetric behavior related to costs becomes stronger when there is a large disparity between ownership and control rights. Research design, data, and methodology - We construct a regression model to examine the relationship between control-ownership disparity and cost stickiness. STICKY, a dependent variable representing cost stickiness is a value found using the method of Weiss (2010), and Disparity is an interest variable that shows control-ownership disparity. Results - This study is based from the unique situations in Korea, in which high control-ownership disparity is common in firms. Large control-ownership disparity was found to increase cost stickiness of corporations. Conclusions - The results of this study imply that controlling shareholders may be regarded as a threat to the interests of minority shareholders and corporate values especially when controlling shareholders have significant influence over managers or the power to make managerial decisions as owners of a corporation.

• Journal of Korean Academy of Nursing Administration
• /
• v.13 no.2
• /
• pp.199-207
• /
• 2007

Purpose: Clinical characteristics and medical cost were analyzed according to the surgical procedures for intertrochanteric fracture in aged patients to assess the appropriateness of treatment expense and to find possibility of reducing the medical cost. Method: Variable for the statistical analysis were; the clinical characteristics, medical cost according to the surgical procedures, the treatment success rate, the total medical expense, and the average expense per case. SAS Package Version 8.02. was used to analyze the relevant data. Results: Operative procedures differ significantly according to the gender and by the location of institution. Only significant clinical variables according to the operative procedure were duration of general anesthesia and amount of blood transfusion. Average cost per treatment was the highest in the bipolar hemiarthroplasty followed by the gamma nail and hip compressing screw. Average cost for bipolar hemiarthroplasty was significantly higher than other surgical procedures. Conclusions: The difference in hospital costs for treatment of intertrochanteric fracture originates from the utilized surgical procedures, mostly by the materials used. The method of surgical treatment should be carefully determined by the purpose of the surgery, in order to improve the quality of medical care and also to reduce the hospital cost.

• Journal of Korean Society of Transportation
• /
• v.25 no.1 s.94
• /
• pp.37-47
• /
• 2007

The Integrated Public Transport Reforms of the Seoul Metropolitan Government, which were implemented on the $1^{st}$ of July. 2004, launched a new fare allocation method. However, when a Private transit operator or a new transport system is introduced into the existing system, it will cause an allocation problem. Therefore, this study aims to Propose a rational fare allocation method which can be applicable regardless of the number of Public transportation modes or operators. To create alternatives, this study has adopted a fundamental principle of revenue allocation methods for the transit or communications sectors, and has applied it to the current transit system of Seoul. This study kas analyzed results of the cost recovery ratios and characteristics of each alternative through case studies. This study kas Presented an assessment criterion Z in order to select an optimal alternative. The criterion consists of the sum of the cost recovery ratio of each operator and the difference of the cost recovery ratio for each agency in inter-agency transit. Using the assessment criterion. the results showed that Alternative 1 is superior to the others : Alternative 1 is considering passenger-km of each operator and unit cost of passenger-km for each operator.

• Management & Information Systems Review
• /
• v.34 no.2
• /
• pp.193-206
• /
• 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 the Korea Institute of Military Science and Technology
• /
• v.19 no.4
• /
• pp.500-507
• /
• 2016

In order to increase the survivability of combatant ship, measuring and analyzing the infrared radiation is important. Consequently, providing analysis report is also important for the progress of the new combatant ship design. This paper proposes a design and software implementation of filtering for the noise reduction of mid-wave IR camera image. We reduced the total test cost by using the suggested software filtering technique instead of hardware replacement or re-calibration. In addition, we enhanced the accuracy of analysis results by adjusting the parameters of software filtering according to the results of filtered image.

• Journal of the Korea Institute of Military Science and Technology
• /
• v.20 no.2
• /
• pp.289-299
• /
• 2017

Because of its unique ordnance or operational requirements, military aircraft has potential risks different from civil aircraft. This explains why there is no global document for military airworthiness and each nation has its own sovereign authority. But harmonized airworthiness activities among authorities are required to reduce cost and time for recent multinational programs. In this study, we show the airworthiness policy of the European Military Airworthiness Authorities and U.S. DOD Authorities which facilitate recognition of certificates and approvals issued by any other authorities. And we propose future works for Korea military airworthiness society to develop organizational recognition system.

• Transactions of Materials Processing
• /
• v.1 no.1
• /
• pp.87-94
• /
• 1992

An analytical method has been presented for the study of the superplastic bulging process of sheet metal. Through this method, it is possible to obtain the optimum pressure-time curve for the superplastic forming and to predict the thickness distribution of bulged sheet metal with less computational cost than that by finite element analysis. Experiments have been performed to confirm the results of this analysis with Supral 150 sheets by adopting the computed optimum pressure-time curve. Good agreement between predictions and experimental data has been obtained for the bulged profile and its thickness distribution.

• International Journal of Aeronautical and Space Sciences
• /
• v.9 no.1
• /
• pp.129-136
• /
• 2008

An roll-pitch-yaw integrated autopilot for missiles is designed for compensation of dynamics coupling. The proposed autopilot is based on the classical control technique. The gains of the proposed autopilot are optimized by using co-evolutionary augmented Lagrangian method(CEALM). Several cost functions are compared in order to find feasible control gains. For a case that a bank angle of missiles is unknown, multiple models are used in the autopilot optimization. In nonlinear simulations as well as linear simulations, the proposed autopilot provided good performances.