• 한국식생활문화학회지
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• 제33권5호
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• pp.437-443
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• 2018

The standardization of food ingredients in the procurement system is essential to maintain the quality of food services. Currently, school food services in Korea do not have such a standardized system, which results in inconsistency of the procurement procedure of food ingredients. This study examined how school foodservice nutritionists perceive the standardization of food ingredients in the procurement system. In particular, this study investigated school foodservice nutritionists' perception on the appropriateness, convenience, and necessity of newly proposed standardized procurement system consisting of a classification and attribute system. A total of 311 nutritionists from 123 elementary schools, 99 middle schools, and 84 high schools were surveyed via both online and offline from June 16-24, 2016. The major findings of the study are as follows. First, three quarters of the nutritionists perceived the newly proposed standardized procurement system to be necessary, while approximately sixty percent of the respondents reported that the newly proposed standardized procurement system is convenient. More than half of the respondents perceived the newly proposed standardized procurement system to be appropriate. The results suggest that the new standardized system directs a better way in terms of the classification and attribute systems of food ingredients. This study suggests that the standardization of food ingredients should be implemented at the operation of school food services.

• 한국프랜차이즈경영연구
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• 제1권1호
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• pp.65-85
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• 2010

프랜차이즈 시스템을 기반으로 하는 하나의 가상기업인 프랜차이즈 기업(Franchise Enterprise)의 개념에서 이 프랜차이즈 기업이 프랜차이즈 사업을 지속적으로 성공하기 위해서는 sub-system 자체도 경쟁력을 갖고 가야하고, 이들 sub-system 간의 공생적 관계(symbiotic relationship)도 프랜차이즈 시스템의 목표인 공생(symbiosis)을 향해서 잘 유지를 해야 한다. 이런 관점에서 프랜차이즈 시스템에 대한 평가는 기존의 프랜차이즈 평가와는 다른 관점에서 진행되어야 할 것으로 보인다. 즉, 기존의 평가 시스템은 가맹본부 중심의 평가에 집중을 하고 있다. 물론 프랜차이즈 시스템의 중심은 가맹본부(가맹본부 시스템)가 되지만 프랜차이즈 시스템을 기반으로 하는 프랜차이즈 기업의 관점에서 보면 가맹본부 시스템과 더불어 다른 하위시스템(가맹점, 벤더, 고객) 간의 공생적 관계가 유지될 때 성공적이고 지속 가능한 사업성과를 기대할 수 있다. 따라서 본 연구에서는 기존 평가시스템을 고찰하고, 지금까지 가맹본부-가맹점 중심의 평가시스템의 관점에서 더 확대하여 4개의 하위 시스템 자체와 이들 간의 공생적 관계(symbiotic relationship)를 통한 공생지수(symbiosis index)를 도출하여 프랜차이즈 시스템의 새로운 평가 모델을 제시하고자 한다.

• 대한산업공학회지
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• 제30권2호
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• pp.130-145
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• 2004

This paper addresses the integrated problem of process planning and scheduling in FMS (Flexible Manufacturing System). The integration of process planning and scheduling is important for an efficient utilization of manufacturing resources. In this paper, a new method using an artificial intelligent search technique, called asymmetric multileveled symbiotic evolutionary algorithm, is presented to handle the two functions at the same time. Efficient genetic representations and operator schemes are considered. While designing the schemes, we take into account the features specific to each of process planning and scheduling problems. The performance of the proposed algorithm is compared with those of a traditional hierarchical approach and existing evolutionary algorithms. The experimental results show that the proposed algorithm outperforms the compared algorithms.

• 천문학논총
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• 제22권1호
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• pp.21-33
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• 2007

Ever since the identification of 6830 and 7088 features as the Raman scattered O VI 1032, 1038 resonance doublets in symbiotic stars by Schmid (1989), Raman scattering by atomic hydrogen has been a very unique tool to investigate the mass transfer processes in symbiotic stars. Discovery of Raman scattered He II in young planetary nebulae (NGC 7027, NGC 6302, IC 5117) allow one to expect that Raman scattering can be an extremely useful tool to look into the mass loss processes in these objects. Because hydrogen is a single electron atom, their wavefunctions are known in closed form, so that exact calculations of cross sections are feasible. In this paper, I review some basic properties of Raman scattered features and present detailed and explicit matrix elements for computation of the scattering cross section of radiation with atomic hydrogen. Some astrophysical objects for which Raman scattering may be observationally pertinent are briefly mentioned.

• Biotechnology and Bioprocess Engineering:BBE
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• 제9권5호
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• pp.379-382
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• 2004

Entomopathogenic nematodes are used for insect control. Herein, an extracellular protease was partially purified from a culture supernatant of Xenorhabdus nematophilus, a symbiotic bacterium of an entomopathogenic nematode, Steinernema glaseri: using precipitation with $80\%$ v/v isopropyl alcohol followed by gel permeation chromatography with a packed Sephacryl S-300 HR media. The partially purified protease exhibited maximal activity at pH 7 in the presence of 1 mM $CaCl_2$. The protease was identified as a metallo-protease based on the inhibition of its activity by the metal chelating agent, EDTA.

• Ocean and Polar Research
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• 제22권1호
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• pp.1-13
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• 2000

Chemoautotrophic symbiotic bacteria of organisms inhabiting the hydrothermal vent and cold seep communities in the deep-sea were histologically examined using a transmission electron microscopy on symbionts of Calyptogena sp. A from the site east off Miyako (water depth at 1,700m), Calyptogena sp. B from the Calyptogena Site, vestimentiferan tube worm Lamellibrachia sp. A from Sagami Bay Lamellibrachia sp. B from Calyptogena Site of the Iheya Ridge, pogonophoran tube worms from Sagami Bay and Calyptogena Site of the Iheya Ridge, Bathymodiolus spp. from Sagami Bay, the Iheya Ridge and the North Fiji Basin. Based on the morphological microscopic observations, two species of Calyptogena from Miyako and the Iheya Ridge, two species of vestimentiferan tube worms from Sagami Bay and the Iheya Ridge, and pogonophoran tube worms from Sagami Bay and the Iheya Ridge observed to host sulfur-oxidizing symbiotic bacteria. The occurrence of chemosynthetic symbionts in these organisms was expected beforehand based on the ecological observations of their habitats. Other members of these groups from the world oceans, and the recent advances in the symbiosis at vents and seeps were reviewed.

• 한국주거학회:학술대회논문집
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• 한국주거학회 2003년도 정기총회 및 추계학술대회
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• pp.165-172
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• 2003

Quantitative planning element and qualitative planning instruction which are required for planning and evaluating environment-friendly building are accessed in previous studies. In this study, the concept of symbiotic housing is introduced for upgrading existing planning elements, so as to study the planning elements collectively. This study can be summarized as below: (1) Planning elements for saving energy and using resources effectively are added in order to preserve the earth environment. (2) In order to harmonize with neighboring environment more, sunshine duration of neighboring buildings is considered; streets and village view are harmonized; space in-between is prepared. (3) For healthy and amenity residential environment, following items are added, improved pleasantness of inside and outside space; improved amenity and health of housing; and, co-dwelling with large scope. Besides, the necessity of residents' agreement is proposed to induce residents' participation, which has not been mentioned before.

• Mycobiology
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• 제28권1호
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• pp.17-26
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• 2000

The orchid symbiotic fungi were isolated from the roots of Korean native orchid (Cymbidium goeringii) collected and Chinese orchid (C. sinense) obtained from greenhouses. They were identified as a species of Rhizoctonia, based on the sequences of 18r rDNA, the microscopic observations of mycelia, and the symbiotic relationships with commercial orchids. The isolate collected from Chinese orchids was revealed to be a species of Ceratobasidium endophytica, and to be different from the other isolates at the thickness of the mycelia stained in the root cells of Korean native orchids. The other isolates collected from the Korean native orchids were considered to be a species of Tulsanella repens (anamorphic: Epulorhiza repens) or its related one. The physiologic or microscopic variations were oftenly observed among them, but the tendency of grouping these in the 18s rDNA sequences were observed to be consistent with those of the localities collected. The further taxonomical segregating for Korean symbiotic fungi was not made because the information concerned were limited in this moment, but was recognized as based on the sequences of 18s DNA.

• 한국경영과학회지
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• 제28권2호
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• pp.1-15
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• 2003

This paper presents a new evolutionary algorithm to solve complex multi-level integration problems, which is called multi-level symbiotic evolutionary algorithm (MEA). The MEA uses an efficient feedback mechanism to flow evolution information between and within levels, to enhance parallel search capability, and to improve convergence speed and population diversity. To show the MEA's applicability, It is applied to the integrated planning of production and distribution in supply chain management. The encoding and decoding methods are devised for the integrated problem. A set of experiments has been carried out, and the results are reported. The superiority of the algorithm's performance is demonstrated through experiments.

• 대한산업공학회지
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• 제29권1호
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• pp.65-77
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• 2003

This paper addresses FMS(Flexible Manufacturing System) loading problems with machine, tool and process flexibilities. When designing FMS planning, it is important to take account of these flexibilities for an efficient utilization of the resources. However, almost all the existing researches do not appropriately consider various flexibilities due to the problem complexity. This paper presents a new evolutionary algorithm to solve the FMS loading problems with machine, tool and process flexibilities. The algorithm is named a multi-level symbiotic evolutionary algorithm. The proposed algorithm is compared with the existing ones in terms of solution quality and convergence speed. The experimental results confirm the effectiveness of our approach.