• Journal of the Korea Society for Simulation
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• v.17 no.3
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• pp.63-73
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• 2008

The aim of study is to analyze the berth occupancy rate according to the ship size. P Iron and steel company operate exclusive bulk terminal at P port and G port and the depth of water at berth are not so equal each other. And to reduce the sea transport cost between loading port and unloading port P and G, P company increases the number of large ship while ship scheduling. But it causes to increase the berth congestion at the specific water depth berth owing to the draught of large ship. At this point, usually ship waiting time starts to rise even at low levels of berth occupancy rate, and will rise more and more sharply at the level of full utilization. But it is not common at exclusive terminal like P port and G port. Bulk ships arrive at port according to the early planned arrival time and the coefficient of variation of ship arrival time is not so big. So queueing time at exclusive terminal does not rise sharply near 80-90 berth occupancy rate.

• Proceeding of Spring/Autumn Annual Conference of KHA
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• 2004.11a
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• pp.413-417
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• 2004

The important goal of urban renewal is not to reform only Physical environment but to improve people' life quality. people who have been lived in urban renewal area are grouped to owner and tenant. owner of land or house has substituent right but tenant has only house-moving money or rental house by urban renewal. But rental house condition is not good to tenant because tenant has large family, low-income and low grade and it is essential to provide rental house for low-income class and it is worth to analyze tenant house problem The purpose of this study is to analyze the problems of public rental house and to presents solutions. The study was done in following process. First, the literatures on this subject were investigated to seek the problems of public rental house. Second, Survey were done on the staff, who works in the cooperative housing redevelopment and whose jobs are officer, consultant, real estate introducer and designer, to seek problems and solution of public rntal house. survey which is made by three group. one group is made by people who already lived in tenant APT, second group is made by people who are waiting for moving in tenant APT. Third group is made by specialist who has many experience-more than 3years- to urban renewal. Third, the Correlation Analysis was used to analyze the relation between the Area and dwelling satisfaction. Fourth, tenant policy' altenative is presented to solve tenant APT' problem which is analyzed by this study The results are as follows : First, tenant APT' size Which is regulated to 30-$45m^{2}$ is enlarged to more than $45m^{2}$ because tenant family is made up averagely of 4.8 persons. Second, tenant APT' rental cost is reduced to 100 thousand won. Third tenant APT' arrangement is divided from owner because tenant and owner want to live in group by group. Fourth, tenant house type is changed to various house type because tenant is not familiar with APT

• Journal of Navigation and Port Research
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• v.35 no.8
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• pp.657-665
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• 2011

This study deals with an integrated problem for deciding sequencing and storage location of export containers together at its receiving operation in the container terminal with a perpendicular layout. The preferred storage location of an export container varies with the priority of the corresponding loading operation and the waiting time of an external truck depends on its storage time. This paper proposes the mixed integer programming model considering the expected arrival time and expected finish time of an external truck and the preferred storage location for its loading operation. And we suggest the heuristic algorithm based on a simulated annealing algorithm for real world adaption. We compare the heuristic algorithm with the optimum model in terms of the computation times and total cost and the performance of the heuristic algorithm is analyzed through a numerical experiment.

• Fire Science and Engineering
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• v.27 no.5
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• pp.15-18
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• 2013

This paper is concerned with the Performance and Reliability Certification for fire detection system in outdoor area such small and middle sized cultural assets, natural monument and outdoor facilities. Especially, if a fire were to occur in vulnerable area, it is difficulty to detect a fire. therefore we propose a high efficiency and low cost unmanned fire detection system in capable of an early detection regardless spontaneously fire or firebug. for Adoption of Intelligent Fire Detection System with movable and unmanned function breaking from the existing Conventional Fire Detection System, this Range of R&D includes the Performance test, Function test, Field test, Flame Detection test and EMI/EMS Compliance test. the Result data of Performance test, Function test and Field test is generally good during 3 months. also we checked that thermal variation test and EMI/EMS compliance test are good result data within allowable range. As a result of general test, we verified improvement results that the measure distance of fire detection extend 75 m, the Power of waiting time increase 4 hours, the Power of operation time increase 3 days and the context awareness with video as well as sensors.

• Health Policy and Management
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• v.21 no.1
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• pp.61-76
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• 2011

Limited research has investigated the satisfaction of patients with cancer. This study was performed to explore patients' satisfaction and the related factors. The data were collected by telephone survey for the participants who were beneficiaries on the national financial aid program for cancer patients between January and October in 2009. Student's t-tests and analysis of variance were performed first to determine if the mean satisfaction score differed by the characteristics of study objects, followed by stepwise multiple regression analyses to examine the factors affecting satisfaction. When comparing the relating factors with patients' satisfaction according to the sociodemographic characteristics, the male, old-aged, higher educated, lower cancer stage, lung cancer group showed a significantly higher level of recognition for satisfaction. A public health center, better public relations, recognized more helpful, don't have expectation, put a person to expense, and don't feel pressured for medical cost groups were showed a higher level of recognition for satisfaction. The result of the multiple regression analysis, short waiting time, well known program policy, recognized helping of policy and had the financial burden had significantly influence on the satisfaction of patients with cancer.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.6 no.6
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• pp.1522-1545
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• 2012

Call admission control (CAC) plays an important role in mobile cellular network to guarantee the quality of service (QoS). In this paper, a dynamic hybrid CAC scheme with integrated cutoff priority and handoff queue for mobile cellular network is proposed and some performance metrics are derived. The unique characteristic of the proposed CAC scheme is that it can support any number of service types and that the cutoff thresholds for handoff calls are dynamically adjusted according to the number of service types and service priority index. Moreover, timeouts of handoff calls in queues are also considered in our scheme. By modeling the proposed CAC scheme with a one-dimensional Markov chain (1DMC), some performance metrics are derived, which include new call blocking probability ($P_{nb}$), forced termination probability (PF), average queue length, average waiting time in queue, offered traffic utilization, wireless channel utilization and system performance which is defined as the ratio of channel utilization to Grade of Service (GoS) cost function. In order to validate the correctness of the derived analytical performance metrics, simulation is performed. It is shown that simulation results match closely with the derived analytic results in terms of $P_{nb}$ and PF. And then, to show the advantage of 1DMC modeling for the performance analysis of our proposed CAC scheme, the computing complexity of multi-dimensional Markov chain (MDMC) modeling in performance analysis is analyzed in detail. It is indicated that state-space cardinality, which reflects the computing complexity of MDMC, increases exponentially with the number of service types and total channels in a cell. However, the state-space cardinality of our 1DMC model for performance analysis is unrelated to the number of service types and is determined by total number of channels and queue capacity of the highest priority service in a cell. At last, the performance comparison between our CAC scheme and Mahmoud ASH's scheme is carried out. The results show that our CAC scheme performs well to some extend.

• Research in Community and Public Health Nursing
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• v.12 no.1
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• pp.32-38
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• 2001

This study focused on the understanding the life of the elderly in the institution by phenomenological method. The participants were seven. who were 4 men and 3 women living in the elderly institution in Taegu. The data were collected through the indepth interviews and participant observation from June 20. 1999 to January 10. 2000 and analyzed by phenomenological analytic method by Giorgi. The structure of the meaning were as follows: Unhappy life: irresponsibility. self-centered thought. hardness. Irresistible life: misfortune. unhealthiness. Reading their son's intention. Bitter life: unfair treatment from their sons and daughters, betrayed feeling for their being thrown away. Outside oriented life: a fear of others' attention, wrong information about institutionalized life, maladjustment. Self-consolation life: comfortableness, convenience, economic merit of low cost. Dissatisfied life: discomfort from communal living. unkindness of the institution staffs, depreciated tendency to the elder people, irrational social security system. economic distress, physical pain, restrained feeling. Tenacity to their sons and daughters longingness for their sons and daughters, regretableness, waiting, Regretable life: remorse for their past life. agony, guilty, loneliness, grief, self-abandonment, self-depreciation, other residents' death in common. Inharmonious life with other residents complaint, conflict, ignorance, selfishness. Yearning life for opposite sex: sexual interest. Preparing for their life: control over their body and mind, consideration for others. A life with hope: blessing death, forever healthfulness, affiliation to their family. From the results of this study an education and consultation should be done as soon as possible to remove the negative recognition of the institutional life to the facility residents. the family and the future consumers of elderly institution. To minimize the maladjustment to facility life of residents, a new program and interventions for the new comer's are needed. The thesis with above results will widen the understandings of institutional residents and an important guidance for a better nursing care in elderly institutions of korea.

• Journal of the Institute of Convergence Signal Processing
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• v.21 no.4
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• pp.202-208
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• 2020

Recently, the importance of non-face-to-face has been emphasized due to COVID-19, and the use of sharing spaces is also expanding. The use of uncontact check-in technology for access control of sharing spaces reduces waiting time and optimizes workers' efficiency, resulting in operational cost savings. In this paper, we propose a sharing space access management system based on a mobile key and RCU (Room Control Unit), access to the facility using a mobile key, and monitor the facility using an RCU. Proposal system is for shared accommodation, rental field (residence, sale-selling hotel), shared office, etc. when there is a one-time visitor on a specific day and time, the corresponding password is delivered to the mobile platform to expose and key the existing password. It is supported by a field-adaptive system that can reduce discomfort such as delivery. In order to test the operation of the proposed integrated system, tests were conducted according to scenarios to understand the overall status of the user's reservation, check-in, and check-out, and a 100% success rate was derived for each item by setting performance indicators to prove test reliability.

• Journal of the Korea Society of Computer and Information
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• v.27 no.1
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• pp.141-148
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• 2022

Global climate change caused by greenhouse gases(GHG) is getting serious. To prevent this, countries around the world are regulating GHG emissions. Korea has decided to reduce GHG emissions by 37% compared to BAU (Business As Usual) by 2030. The transportation sector accounted for 18.58% of the domestic GHG emission, and roads accounted for 93.75% of the total. Public transportation is also included in the target of GHG reduction, and this study was conducted to reduce GHG emissions of bus public transportation, which can reduce GHG emissions while reducing the cost of road transportation. In this study, a simulation was conducted to predict the optimal GHG emission compared to the waiting time of passengers by adjusting the bus dispatch interval by implementing a greenhouse gas simulation model using Any Logic. If a more precise model is implemented in the future, it is expected that it will be used to reduce bus GHG emissions.

• Journal of Korea Society of Industrial Information Systems
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• v.14 no.2
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• pp.32-50
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• 2009

Since 1990 when order communication system(OCS) was first introduced, the use of information technology in medical service has been widely accepted in order to enhance quality and customer relationship as well as to increase managerial efficiency. Medical information system is rapidly increasing and is trying to make ubiquitous healthcare environment through telemedicine system. Especially, medical profession and government have taken interest in electronic medical record (EMR) system which can digitalize and manage all medical records in hospitals. By recording patient's medical information in real time, EMR system can improve service efficiency and customer service quality including short waiting time, various utilization of clinic information, and reduced cost.