• 한국컴퓨터정보학회논문지
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• 제28권8호
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• pp.11-19
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• 2023

본 논문에서는 기존에 영상의 품질을 평가하는 데 사용되던 지표가 저조도 영상에 대해서도 적용될 수 있음을 확인한다. 저조도 영상의 특성상, 빛과 관련된 요인들이 다양한 잡음 패턴을 만들어내고 빛의 양이 적을수록 극심한 잡음을 가지고 있다. 그렇기 때문에, 잡음이 없는 깨끗한 영상을 구하기 힘든 상황에서 잡음이 제거된 저조도 영상의 품질을 사람의 눈으로 판단하는 경우가 많다. 본 논문에서는, ground truth를 구할 수 없는 저조도 영상의 잡음을 Noise2Noise를 이용해서 제거하고, MTF와 SNR 등의 지표로 공간 해상도와 방사 해상도를 ISO 12233 차트와 colorchecker를 대상으로 평가한다. 정성적 평가 위주로 평가되던 저조도 영상의 품질이 정량적으로도 평가될 수 있음을 보여줄 수 있다.

• 한국조리학회지
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• 제22권7호
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• pp.47-57
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• 2016

본 연구는 중저가 체인 호텔 이미지가 서비스 품질과 소비가치 및 고객감정에 미치는 영향 관계를 분석함으로 AMOS 22.0 통계 패키지 프로그램을 활용하여 분석하였고, 사용된 통계기법은 측정도구의 단일 차원성으로 확인적 요인분석, 항목의 인과관계 검증으로는 구조방정식 모형을 사용하였다. 가설 검증 결과, 첫째, 중저가 체인 호텔 이미지는 서비스 품질 정(+)의 영향을 미치는 것으로 나타났다. 둘째, 중저가 체인 호텔 이미지는 소비가치 정(+)의 영향을 미치는 것으로 나타났으며 셋째, 소비가치는 서비스 품질의 정(+)의 영향을 미치는 것으로 나타났다. 넷째, 서비스 품질은 고객 감정 정(+)의 영향을 미치지 않는 것으로 나타났으며, 다섯 번째, 중저가 체인 호텔 이미지는 고객 감정 정(+)에 영향을 미치는 것으로 나타났다. 본 연구에서 중저가 체인 호텔 이미지가 서비스 품질, 소비가치 및 고객감정에 미치는 영향을 분석함으로써 중저가 체인 호텔의 경영 전략적인 방안을 수립을 하려고 하였다. 그 결과, 중저가 체인 호텔 이미지에 따른 서비스 품질에서는 확신성 즉, 호텔직원들의 믿음이 가장 컸으며, 중저가 체인 호텔 이미지 따른 소비가치에서는 기능적 가치 즉, 호텔직원들의 친절한 서비스가 가장 높은 만족도로 나타났다. 따라서 이는 중저가 체인 호텔을 운영하는데 중요한 마케팅 전략으로 사료된다.

• 물과 미래
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• 제35권5호
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• pp.51-59
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• 2002

In recent years the human impact on the environment becomes increasing lift threatening, calls for the better management of resources. In field of water quality of river flow, the best way to conserve water quality is specific efforts to control the pollutant loadings and treat the loadings in the basin to reduce the discharge of pollutant loadings to river. But in general the water quality influenced by the dam discharge. Especially in dry season, it is more dominant way to improve the water quality which contaminated with the pollutant loadings from the basin. The dam discharge amounts of the 2 dams in the Keum River that maintain the down stream water quality were estimated for the year of 1999, 2001, 2006, 2011, in case of irrigation and non-irrigation seasons. The pollutant loadings for the basin are estimated with the planning of treatment plants construction schedule for every sub-basins. The river flow rates were considered low flow as 2.33 year low flow and 10 year low flow. The QUAL2E model was used as a tool of simulation.

• 품질경영학회지
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• 제46권3호
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• pp.425-440
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• 2018

Purpose: This study is aimed at developing of the flex resistance testing process at low temperature with the waterproof fabric to suit the military environment, and is designed to fit for the purpose of the waterproof materials in order to optimize the test method by finding out matters to improve from existing the test method and through previous studies. Methods: The test method, which has been applied to flex resistance of existing water-repellent materials, was improved and consequently, differentiated test results could be obtained according to the test temperature, sample size, and flexing method. Results: The testing of the total of 8 samples revealed that performance of the military requirement could hardly be met just by presenting the materials or 2~3 layers when the quality criteria for high functional water repellent fabrics were applied. PTFE(Polytetrafluoroethylene) is preferred to PU(Polyurethane) to be used in the extremely low-temperature environment, but durability under the low-temperature environment may be varied depending on film thickness or laminating technique even if the materials of waterproof films are identical. Therefore, in addition to the material or texture, the test method capable of reflecting durability under the low-temperature environment shall be suggested, and the newly designed test method proposed in this study was shown to suggest differentiated quality criteria by the material. Conclusion: The water resistance measurement and the test method following flex resistance with expanded range of flex will enable the differentiable test of the samples according to the number of repetition. This study is meaningful in that it suggests a differentiable test method capable of establishing a basis of deciding suitable material when selecting military goods made of water repellent material by properly improving the test method.

• 한국약용작물학회지
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• 제18권3호
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• pp.135-142
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• 2010

Low quality fresh ginseng was fermented by Pheliuus linteus mycelium at $22^{\circ}C$ for 30 days, then extracted by water solvent at $100^{\circ}C$ for 180 min. On human normal cell lines (HEK293), cytotoxicity was about 10% lower in adding extracts of the fermentation ginseng than that from low quality ginseng. The fermented extracts also inhibited the growth of several human cancer cells. Among them, respectively, digestive organs related cancer cells, such as human stomach adenocarcnioma and human epithelial adenocarcinoma were most effectively inhibited up to 85% and 90%, respectively. Then, selectivities were in the ranges of 3 to 5, compared to 2 to 3 from low quality fresh ginseng. Generally, fermented ginseng extract showed higher anticancer activities as well as higher DPPH radical sacavening activity, possibly due to high contents of total phenolic components as 6.96 mg/g. It was very interesting that the fermented ginseng contained very higher contents of ginsenoside-Rc+$Rb_2$, compared to others in low quality fresh ginseng because of partition digestion of mycelium growth. The results can tell that low quality fresh ginseng can be utilized by the fermentation with Pheliuus linteus mycelium.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2012년도 제43회 하계 정기 학술대회 초록집
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• pp.248-248
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• 2012

Synthesis graphene on Cu substrate by plasma-enhanced chemical vapor deposition (PE-CVD) is investigated and its quality's affection factors are discussed in this work. Compared with the graphene synthesized at high temperature in chemical vapor deposition (CVD), the low-temperature graphene film by PE-CVD has relatively low quality with many defects. However, the advantage of low-temperature is also obvious that low melting point materials will be available to synthesize graphene as substrate. In this study, the temperature will be kept constant in $400^{\circ}C$ and the graphene was grown in plasma environment with changing the plasma power, the flow rate of precursors, and the distance between plasma generator coil and substrates. Then, we investigate the effect of temperature and the influence of process variables to graphene film's quality and characterize the film properties with Raman spectroscopy and sheet resistance and optical emission spectroscopy.

• Preventive Nutrition and Food Science
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• 제10권3호
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• pp.224-230
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• 2005

The effects of low viscosity chitosan on the rheological properties of soymilk using a model system and on tofu qualities were examined. The flow behavior of soy milk with chitosan closed the Newtonian flow and stabilized according to increasing chitosan concentration. The soymilk containing $glucono-\delta-lactone$ exhibited a more pseudoplastic flow behavior compared with that of the control soymilk. The addition of low viscosity chitosan to the tofu preparation did not significantly affect its physicochemical properties. However, the results of the TEM image and instrumental textural properties showed that low viscosity chitosan affected the construction of the tofu structure. Chitosan tofu had low scores across the whole field of appearance in the sensory evaluation, and its overall eating quality was scored significantly lower. These results suggest that the addition of low viscosity chit os an affects the quality of tofu, which changes according to the degree of polymerization and concentration of chitosan.

• 한국문헌정보학회지
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• 제47권1호
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• pp.39-55
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• 2013

It is a difficult problem to use keyword retrieval for low-quality Korean document images because these include adjacent characters that are connected. In addition, images that are created from various fonts are likely to be distorted during acquisition. In this paper, we propose and test a keyword retrieval system, using a support vector machine (SVM) for the retrieval of low-quality Korean document images. We propose a keyword retrieval method using an SVM to discriminate the similarity between two word images. We demonstrated that the proposed keyword retrieval method is more effective than the accumulated Optical Character Recognition (OCR)-based searching method. Moreover, using the SVM is better than Bayesian decision or artificial neural network for determining the similarity of two images.

• 한국환경과학회지
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• 제5권3호
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• pp.377-385
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• 1996

This study aims at the estimation of a river management flow in urban basin analyzing Sinchun basin to be the tributary of Kumho river basin. The river management flow has to satisfy a low flow as natural flow and an environmental preservation flow estimated by a dilution flow to satisfy a target water quality in drought flow. Therefore for the estimation of a river management flow in Sinchun in this study, first Tank model as a basin runoff model estimates a low flow, a drought flow from a flow duration curve in Sinchun, second QUAL2E model as water quality model simulates water quality in Sinchun and estimates environmental preservation flow to satisfy a target water qua%its, BOD 8 mg/l by a dilution flow derived from Kumho river, Nakdong river and around water. And the river management flow is estimated by addition of a use flow and a loss flow to more flow between a low-flow and an environmental preservation flow.

• The Korean Journal of Pain
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• 제32권1호
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• pp.22-29
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• 2019

Background: The aim of this study was to investigate the relationship between pain catastrophizing, acceptance, and quality of life in relation to chronic low back pain in Jakarta, the capital city of Indonesia. We also analyze the effect of personality in catastrophizing and acceptance. Methods: A total of 52 chronic low back pain patients were enrolled as participants from 2 hospitals in Jakarta (43 females, 9 males, mean age 54.38 years). Participants completed a set of self-reported questionnaires: the NEO Five Factor Inventory (NEO-FFI), Chronic Pain Acceptance Questionnaire-Revised (CPAQ-R), Pain Catastrophizing Scale (PCS), and Pain Discomfort Module (PDM). Results: This study showed that acceptance increased the patient's quality of life by giving physical relief from pain. In contrast, pain catastrophizing decreased the quality of life, and increased the patients' tendency to get frustrated, irritated, and anxious about the pain. From a personality perspective, the trait neuroticism may lead to a higher level of pain catastrophizing. Conclusions: This study showed that catastrophizing, compared with acceptance, had a greater impact on the patient's life by reducing its quality.