• Food Science and Biotechnology
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• 제15권4호
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• pp.564-571
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• 2006

In order to improve the quality and preservation of nabakkimchi, omija was added as an ingredient to determine its effect on the physicochemical characteristics of kimchi during fermentation, as well as the optimum level of omija extract. Omija extract was prepared from omija seeds by extraction with water for 9 hr at room temperature in concentrations (w/v) of 0.5, 1.0, 1.5, and 2.0% for use as an ingredient in nabakkimchi. The physicochemical characteristics of nabakkimchi containing omija extract were analyzed during fermentation of the product for up to 25 days. Delayed fermentation was observed, particularly in the early stage of fermentation, and was dependent on the concentration of the omija extract, as shown by stabilization of pH decreases and increases in the total acidity. An increased concentration of omija extract also raised the initial total vitamin C content and the reducing sugar content, which both then stabilized thereafter. Delayed development of turbidity within the optimum fermentation period of 16 days, increased redness and total color difference, and an electron-donor effect were also promoted by the omija extract. However, the omija extract also triggered extra tannin production, which leads to an astringent taste, especially at the 1.5 and 2.0% treatment levels.

• International Journal of Advanced Culture Technology
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• 제9권3호
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• pp.212-220
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• 2021

Method : Using annual statistics of major surgeries provided by the National Health Insurance Corporation, it figured out what changes come in visual acuity by the number of cataract surgeries nationwide plus age, gender, and geriatric disease every 3 years from 2013 to 2019 through joint point regression for statistics. Objective : This study is intended to identify the relationship between geriatric diseases (diabetes, hypertension, obesity) and visual acuity in geriatric cataract surgery patients. Result : First, geriatric diseases of cataract surgery patients were closely related to diabetes, hypertension, obesity, smoking, and drinking. In particular, diabetes, hypertension, and smoking had a high prevalence rate. There was no difference in gender and age. Second, 72% of all geriatric cataract surgeries were performed at the clinic level, and intraocular lens that was used after geriatric cataract surgery accounted for the majority of monofocal intraocular lens as 96.6%. Third, the visual acuity in geriatric cataract surgery patients improved from an average of 0.40 before surgery to 0.06 after surgery, and visual acuity improvement was found in 95% of them. These results suggest that geriatric cataract patients can expect visual acuity stabilization and positive visual acuity improvement through early surgery.

• 한국환경복원기술학회지
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• 제24권3호
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• pp.19-31
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• 2021

The waste landfill that has been used as a park through a stabilization project to provide green space to local residents. Vegetation restoration is necessary for the landfill park project, but it is difficult to restore vegetation due to various disturbances in the landfill. This study analyzed the successional dynamics and ecological characteristics of Robinia pseudoacacia communities from the slopes of Noeul Park by applying the 7-stage successional hypothesis. As a result of the study, there was almost no intermediate successional stage. There are only the early successional stage which Robinia pseudoacacia has an absolute dominance of 100% in the crown and middle layers, and the degeneration successional stage which formed by the introduction of Morus alba. This result showed that the succession of Robinia pseudoacacia communities were not able to proceed to the climax forest due to various disturbances in the waste landfill. Therefore, it was analyzed that it is necessary to induce the succession through intermediate steps such as Morus alba, since it is difficult to transition from Robinia pseudoacacia community to the native Quercus spp. community.

• 산업경영시스템학회지
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• 제43권4호
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• pp.123-132
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• 2020

Currently, there are two types of trainer in Korea : basic and advanced. Both models have been in operation for more than 10 years, and compared to the early stage of operation, reliability has gradually improved and failure rates have also entered a trend of stabilization. Therefore, it is necessary to extend the maintenance period considering economic feasibility. This study investigates the three maintenance period calculation methods: NAVAIR 00-25-403 [17], DOD, U.S. [4], CERL and US Army [3], with intention to extend the maintenance period of the trainer from current 200 hours to 400 hours. In addition, the maintenance period was calculated by the three methods with actual operational data. Common standards and procedures were established to apply operational data to the existing maintenance period calculation methods, the required reliability indicators were derived, and the maintenance periods was calculated based on the results, additionally, a review on the field applicability of the three maintenance cycles was conducted. An on-site interviews were conducted with the calculation results, and 11 out of the 15 items were expected to be extended by 400 hours. It was suggested that the remaining 4 items could be extended to 400 hours by supplementing the inspection method through additional analysis such as functional analysis, inspection content verification, and site connection.

• 대한족부족관절학회지
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• 제26권1호
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• pp.9-15
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• 2022

Syndesmotic injuries are found frequently in clinical practice, and they remain controversial because of the variety of diagnostic techniques and management options. Bony avulsions or malleolar fractures are commonly associated with syndesmotic disruptions. Even unstable isolated syndesmosis injuries are associated with a latent or frank tibiofibular diastasis and should not be ignored in the early phase. A relevant instability of the syndesmosis with diastasis results from collateral ligaments tears and requires operative stabilization. The treatment involves an anatomic reduction of the distal tibiofibular articulations followed by stable fixation. Syndesmotic transfixation screws or suture button implants are being proposed as a means of fixation. Recently, suture button fixation has shown more favorable outcomes, but the outcomes can still be controversial. Syndesmotic malreduction can lead to hardware failure, adhesions, heterotopic ossification, tibiofibular synostosis, chronic instability, and posttraumatic arthritis. In particular, the correct diagnosis and evidence-based treatment options for unstable syndesmotic injury should be considered.

• Proceedings of the National Institute of Ecology of the Republic of Korea
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• 제4권3호
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• pp.95-103
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• 2023

This study aimed to identify the initial migratory macroinvertebrate species in two newly created mountain wetlands. To analyze the initial immigration species of macroinvertebrates, two experimental sites and two control sites were selected after habitat creation and investigated thrice from spring to fall. Benthic macroinvertebrates were collected quantitatively from each site using a Surber sampler and Modified D-frame deep net. After restoration at the two experimental sites, the number of macroinvertebrate species and individuals gradually increased from spring to fall and continued to increase over time with the development of waterside vegetation and habitat stabilization at the experimental sites. The species initially introduced to mountain wetlands after their creation were Ephemera strigata, Ephemera orientalis, Chironomidae sp., and Aquaris paludum. Subsequently, predators such as Davidius lunatus, Sieboldius albardae, Oyamia nigribasis, and Sialis longidens were introduced. Additionally, as a differentiating physicochemical factor between the two habitats, current velocity, which determines the distribution characteristics of benthic macroinvertebrates, and water temperature, which impacts the growth of organisms, showed a relatively stronger influence.

• Journal of Korean Dental Science
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• 제17권2호
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• pp.84-91
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• 2024

Achieving both esthetic and functional implant rehabilitation is crucial for the successful treatment of the anterior maxilla. Adequate peri-implant alveolar bone and soft tissue are essential for optimal rehabilitation of the esthetic area, and there is a direct association between the implant position and prosthetic outcomes. Immediate provisionalization may also be advantageous when combined with augmentation. This case report described the implant placement in a 25-year-old female patient who had lost her right maxillary lateral incisor (#12) due to trauma-induced avulsion. The treatment involved simultaneous grafting and collagenated, deproteinized bovine bone mineral, along with subepithelial connective tissue taken from the right maxillary tuberosity. A polyetheretherketone abutment and non-functional immediate provisionalization were performed by removing both the proximal and occlusal contacts on the composite resin crown. Clinical and radiographic evaluations revealed maintenance of stable ridge contour aspects for six months following surgical treatment. In summary, implant rehabilitation in the esthetic zone can be successful using simultaneous soft and hard tissue grafts. Moreover, soft tissue stabilization post-subepithelial connective tissue grafting can be achieved through early or immediate visualization, along with immediate implant placement.

• KDI Journal of Economic Policy
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• 제35권2호
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• pp.71-105
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• 2013

최근 유로지역의 재정위기 등으로 재정건전성의 중요성이 부각되면서 경기조절을 위한 수단으로 추경과 같은 통상적인 재정확장 수단 이외에 재정의 조기집행이 강조되고 있다. 원칙적으로 재정의 조기집행은 재정건전성에 영향을 미치지 않으면서 예산범위 내에서 시점 간 재원배분 조정을 통해 경기변동에 대응하는 재정정책 수단이다. 본 연구에서는 재정의 조기집행과 같이 재정지출의 시점 간 재원배분 조정이 경기조절에 얼마나 효과적인지를 실증적으로 살펴보고 있다. 구체적으로 우리나라의 통합재정수지 자료를 이용하여 계절적 요인을 제외한 1년 이내 주기의 변동을 추정한 후, 이를 시점 간 재원배분 조정 규모로 정의하고 종속변수인 실질 경제성장률에 대한 회귀분석을 실시하였다. 그 결과, 재정지출의 시점 간 재원배분 조정의 경기조절효과는 정책효과의 시차가 있기는 하지만 대체로 유의하게 나타났다. 한편, 거시모형을 이용한 시뮬레이션 결과, 특정 시점의 재원배분 변동은 동일 회계연도의 인접 시점에 반대 방향으로의 재원배분 조정이 있을 것임을 의미하는바, 전체적인 경기조절효과는 크지 않은 것으로 나타났다. 다만, 시점 간 재원배분 조정은 주요 거시경제변수의 변동성을 하락시켜 거시경제 안정화에 일부 기여하는 것으로 나타났다. 특히 이러한 안정화 효과는 금융위기 기간에는 명확하게 나타난 반면, 통상적인 경기변동 기간에는 그리 크지 않은 것으로 나타났다.

• 수산경영론집
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• 제42권2호
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• pp.113-130
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• 2011

The laver has been cultivated long time ago by Korea and Japan. Korean Laver Industry has been influenced by Japan on the many factors since 20th. Nevertheless now the both country showed widening disparities across the aspect of total Laver Industry each other. The development steps of Korea and Japan Laver Industry have been advanced differently. That is, we can keep the Laver Industry development steps of both countries separate by 4 steps. But insignificant of every step against both countries has been dissimilar. We can separate from 4 steps in Korea, 1 step is origin period from beginning of laver cultivation to 1961. Next step is First Development period from 1962 to 1978. This period come out production increase from about 10,000 tons early 1960 to 50,000 tons late 1970. Next step is Second Development period from 1979 to 2000. This period come out eminent production increase from about 50,000 tons early 1980 to 200,000 tons late 1990. Next step is Stabilization period from 2001 to now. This period come out production control the size of its production and enlargement of Laver Export. We can also separate from 4 steps in Japan, 1 step is origin period from beginning of laver cultivation to 1944. Next step is Development period from 1945 to 1975. This period come out production increase from about 4 billion sheets early 1960 to 8.5 billion sheets 1975. Next step is Peak period from 1976 to 1982. This period come out sustainable production peak by 6~8 billion sheets and high price. Next step is Decline period from 1983 to now. This period come out production control the size of its production and sustainable price down. These differences showed out facing problems of Korean and Japanese Laver Industry differently. In case of Korea, the facing problems show out 3. First is structural problem, for example, trouble between original laver producer and the finished producer by dry laver products. Second is Insufficiency of Plants Protection System. Third is low quality of Laver. In case of Japan, the facing problems also show out 3. First is sustainable decrease of laver consumption. Second is change of mind against laver, for example, the change of the propensity to consume, and decrease of brand power. Third is Influence of global system. The difference of development steps of Korea and Japan Laver Industry show out 2 point of view to us. First we need consider positive strategy against laver production system of enlargement. Second, we need consider separate strategy against high quality laver and low quality laver.

• 유기물자원화
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• 제14권1호
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• pp.139-150
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• 2006

매립은 폐기물의 최종처분방법으로 광범위하게 이용되며, 매립된 폐기물은 미생물의 활동에 의해 분해된다. 미생물에 의한 생분해는 수분, 산소, pH, 알칼이도, 그리고 온도 등에 의해 영향을 받는다. 특히, 산소와 수분은 호기성매립지 내에서의 미생물의 활성에 주요한 인자이다. 본 연구에서는 산소의 유무가 매립폐기물의 분해속도에 미치는 영향에 대한 평가와 호기성 상태에서 수분이 고형폐기물(MSW)의 분해에 미치는 영향을 조사하여 분석하였다. 산소의 유무에 따른 매립폐기물의 분해특성을 연구하기위하여, 혐기성 및 호기성 모형매립조를 설치하여 실험한 결과, 호기성 모형매립조의 침출수는 80일 경까지 BOD, CODcr 농도가 빠르게 감소하였으나 혐기성 모형매립조는 유기물의 농도가 초기에 비하여 크게 감소하지 않았다. 그리고 호기성 폐기물매립지에서의 수분의 영향을 평가하기 위하여 4기의 모형매립조에 고형폐기물을 충전하여 수분함량을 20, 30, 40, 50%로 하여 운전하였다. 그 결과 수분함량이 높을수록 $CO_2$의 농도가 높게 측정되었는데, 이는 수분함량이 높을수록 미생물 분해가 효과적임을 의미한다. 따라서 호기성폐기물매립지에서 수분함량이 높을수록 고형폐기물의 조기안정화에 도움을 주는 것으로 사료된다.