• Journal of the Korean housing association
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• v.20 no.1
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• pp.123-132
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• 2009

The purpose of this study was to establish the housing welfare delivery system in Incheon. Documentary research and content analysis methods and survey were used in this study. Data drawn from internet homepage of each community center, gu-office and city hall in Incheon. The major results of this study are as follows. 1) Related works of housing welfare are housing welfare facility management, self helf center, support service of housing life, residential environment management 2) Housing welfare delivery system consists of city, gu-office, community center order. There are many problems that the lack of experts and department of housing welfare and inconsistent works. 3) There should be optimize the related works of housing welfare in order to increase of efficiency of works and to prevent overload to public servant. 4) Housing welfare delivery system needs to co-work through collaborative network in order to realize welfare society. And each main groups have to establish their horizontal relationships.

• Journal of Korean Institute of Industrial Engineers
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• v.32 no.3
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• pp.163-171
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• 2006

This paper considers a scheduling problem to minimize the sum of the associated scheduling (production/delivery times) cost and the delivery cost for an integrated system of a single production machine and various transportation vehicles with transportation mode selection allowed. Each transportation mode is provided with a fixed number of vehicles at the associated delivery time and cost. The proposed problem is characterized as being NP-hard. Some solution properties are also characterized. Therewith, three heuristic algorithms (called SPT-based, LWF-based and WSPT-based heuristic) and a branch-and-bound algorithm are derived. In order to evaluate the effectiveness and efficiency of the proposed algorithms, computational experiments are made with some numerical instances.

• Proceeding of Spring/Autumn Annual Conference of KHA
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• 2008.11a
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• pp.290-295
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• 2008

The purpose of this study was to establish the housing welfare delivery system in Incheon. Documentary research and content analysis methods and survey were used in this study. Data drawn from internet homepage of each community center, gu-office and city hall in Incheon.. The major results of this study are as follows. 1) Related works of housing welfare are housing welfare facility management, self helf center, support service of housing life, residential environment management 2) Housing welfare delivery system consists of city, gu-office, community center order. There are many problems that the lack of experts and department of housing welfare and inconsistent works. 3) There should be optimize the related works of housing welfare in order to increase of efficiency of works and to prevent overload to public servant. 4) Housing welfare delivery system needs to co-work through collaborative network in order to realize welfare society. And each main groups have to establish their horizontal relationships.

• Journal of Information Technology Services
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• v.7 no.2
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• pp.223-242
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• 2008

We assess service delivery system for outpatients of general hospital(A) using service blueprint. Service blueprint for outpatients' service process currently being implemented in general hospital(A) is analysed to improve hospital services and define hospital service delivery system more accurately. In addition, comparative analysis of service blueprint between before and after improvement is conducted to find that health care services Is now more customer-oriented and hospital employees can link their duties to service delivery system. Dealing with the efficiency of health care service delivery system based on service blueprint analysis is expected to pave the way for continual service quality improvement of general hospitals in the future. The analysis of service blueprint of outpatients' service process suggested in this study is useful for setting strategies for health care service. It also helps service process design and service digitalization of other general hospitals in the future.

• Advances in nano research
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• v.13 no.3
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• pp.269-284
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• 2022

Nanomachines can be pretty helpful in curing diseases. Nanomototors, thanks to their self-propelled feature, are one of the best structures to be utilized as drug delivery devices. These devices have been employed in biomedical application as they can improve the efficiency of drug delivery. In this study stability of a designed nanomotor in the bloodstream is investigated when the physical activities have been done considering the physical activities. Sports training, as well as exercise enhance the bloodstream, and this factor can significantly impact the drug-delivery quality. The mathematical simulation of nanomotor movement in the condition of the sports is done based on the mechanical sciences, and the impact of various essential parameters is discussed in detail.

• Journal of Convergence for Information Technology
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• v.8 no.5
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• pp.243-249
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• 2018

This study is to verify the accommodation attitudes and intention of use of the end-users to use the drone distribution delivery service that is to be introduced in Korea. For a research purpose, the research model and hypothesis in this study have been set based on by using the SPSS 22.0. Upon these, the extended technology acceptance model has been used to verify the correlation service of new technology, and the result has shown that the user of drone distribution delivery service has a causal relationship with individual innovation and that the accommodation behavior and intention of use have a causal relationship with economic efficiency and convenience. However, there was no causal relation from a perceived risk. Hence, based on the results of study about accommodation behaviors and intention of use of the end users of drone distribution delivery service, the marketing implications have been provided for commercialization of drone delivery service.

• The Korean Journal of Franchise Management
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• v.6 no.1
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• pp.1-20
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• 2015

Home Meal Replacement (HMR) products are ready-to-eat or pre-cooked food products that are consumed at daily home. HMR market has grown rapidly due to societal changes: increases in female social activities, silver population, and one-person households. Consumption channels of HMR can be classified into take-out, delivery, and retail. In Korean HMR market, retail sector is largely growing, but companies are focusing their business on the home delivery sector. Moreover, franchise companies are expanding their areal coverage in the HMR market based on their multi-unit strategy. However, more research on the HMR market is needed as existing studies are limited in conceptualization, classification, and processed food from malls or home-shopping channels. Therefore, we conducted the efficiency analysis on Gukseonsaeng, one of franchises that applied the take-out channel, using DEA method. According to the research on 29 franchisees of Gukseonsaeng, 77.9% of input appeared inefficient for technical efficiency, while 53.3% of input appeared inefficient for scale efficiency. Thus, we found that franchises of Gukseonsaeng are structured in increasing returns to scale (IRS), so enhancing efficiency by expanding scales need to be implemented.

• Bulletin of the Korean Chemical Society
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• v.33 no.5
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• pp.1536-1540
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• 2012

Chicken primordial germ cells (cPGCs) are founder germ cells in embryonic stage of development that eventually give rise to sperms or oocytes. Currently cPGCs are only known cells enabling germline transmission in chicken and their cultivation protocols were recently established. Although genome modifications of chickens are now theoretically possible using cPGCs, there are still several hurdles to overcome to practically use cPGCs as mediators for chicken transgenesis. First, efficiency of gene delivery into cPGCs remains low with current methods. Second, there aregene silencing mechanisms against the expression of foreign genes in cPGCs. In this study, we successfully increased the efficiency of gene delivery in cPGCs by taking advantage of the TTAA-specific $piggybac$ transposon system. Moreover, a pipette-type electroporator significantly enhanced transfection efficiency up to 5-fold compared withcuvette-type methods. Taken together, the technological advances in our study will provide practical benefits for the application to fulfill genetic modifications of chicken genome.

• Journal of Microbiology
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• v.43 no.2
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• pp.179-182
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• 2005

The inefficiency of in vivo gene transfer using currently available vectors reflects a major hurdle in cancer gene therapy. Both viral and non-viral approaches that improve gene transfer efficiency have been described, but suffer from a number of limitations. Herein, a fiber-modified adenovirus, carrying the small peptide ligand on the capsid, was tested for the delivery of a transgene to cancer cells. The fiber-modified adenovirus was able to mediate the entry and expression of a $\beta$-galactosidase into cancer cells with increased efficiency compared to the unmodified adenovirus. Particularly, the gene transfer efficiency was improved up to 5 times in OVCAR3 cells, an ovarian cancer cell line. Such transduction systems hold promise for delivering genes to transferrin receptor overexpressing cancer cells, and could be used for future cancer gene therapy.

• Journal of Navigation and Port Research
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• v.37 no.3
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• pp.321-327
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• 2013

As the market of express delivery services expands rapidly, delivery service companies are exposed to severe competition. As a result of the surplus of delivery companies, they are struggling with remaining competitive at a reasonable price with appropriate level of customer satisfaction. To cope with competition pressures, a strategic alliance is suggested as an effective solution to the challenges faced by small and medium enterprises (SMEs) in express delivery services. Therefore, this study suggests a combined optimization and simulation approach to the reconfiguration of an express delivery service network for strategic alliance with respect to strategy partnership of closing/keeping service centers among companies involved and adjustments of their cutoff times. An illustrative numerical example is presented to demonstrate the practicality and efficiency of the approach.