• 정보처리학회논문지C
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• 제12C권5호
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• pp.709-716
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• 2005

본 논문은 광가입자 망의 QoS(Quality of Service)에 관한 것으로 액세스 망의 구조를 설명하고, QoS 요구사항에 따른 가입자 및 서비스의 대역을 동시에 보장하기 위한 방안을 제시한다 먼저, 서비스뿐 만 아니라 가입자 대역을 동시에 보장할 수 있는 방안에 관한 연구로 2계층 분류 방식을 제안한다. 2계층 분류 방식은 서비스를 분류하는 서비스 분류 테이블과 가입자를 분류하는 가입자 분류 테이블의 구성을 통한 두 단계의 분류 방식으로 가입자 대역을 보장할 수 있다. 또한, 플로우의 손실율을 최소화하는 분류 테이블의 엔트리 수를 M/G/k/k의 큐잉모델로 도출한다. 그리고, 가입자들의 공평성을 보장하기 위해 가입자 단위의 가상 큐잉과 스케줄링을 통해 시스템이 목표로 하는 지연범위를 만족시키는 큐의 수를 도출하였다.

• 대한지역사회영양학회지
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• 제19권5호
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• pp.459-467
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• 2014

Objectives: The purpose of this study was to suggest the strategies for improvement of home-delivered meal services for the elderly, to identify reasons for recipients to get started with the services and to evaluate the attitude, acceptability and adaptation of recipients to the services from the perspective of life context. Methods: The data was collected through face-to-face in-depth interviews with eighteen low-income elderly recipients of home-delivered meals and analyzed using a qualitative research method. Results: The results were deduced as four themes which comprised of long-term vulnerable socioeconomic contexts resulted in entry to the services, conflicting acceptability to the services, passive adaptation to taking the services, and positive practices to cope with supplement free meals or other services. The service participation was initiated because of a combination of prolonged, vulnerable socioeconomic contexts, including poverty and unexpected life events such as diseases, disability, living alone, aging and unemployment. With regard to taking the services, conflicting acceptability was observed: positive aspects including saving living cost and good quality of meals, and negative aspects including lack of a tailored service and feeling of stigma. Although the recipients needed an individualized service, they did not express their needs and demands for the services and they accepted the unavailability as an accustomed, prolonged vulnerable socioeconomic context. With regard to lack of tailored services, either self-solution such as modification of eating patterns or community-based network and services were used. Conclusions: We suggest that a system to concretely identify recipients' attitude, acceptability and adaptation for home-delivered meal services should be developed in the establishment of a tailored nutrition support system for the low-income elderly.