• 대한치과마취과학회지
• /
• 제11권2호
• /
• pp.146-152
• /
• 2011

Background: Elderly patients with progressive dementia including Alzheimer's disease (AD) are more and more often scheduled to undergo general anesthesia for various pathologies including dental problem. But, there is high risk of deterioration of underlying mental diseases and other co-morbidities. So it is important to implement preventive strategies and take adequate measures to minimize negative perioperative events in these patients. Methods: We reviewed the 17 cases of 11 patients with AD who underwent ambulatory general anesthesia for dental treatment at the clinic for the disabled in Seoul National University Dental Hospital. Results: The mean age was 68 (57-81) years. All of them were diagnosed with AD and some had hypertsnsion, bronchiectasis, urinary incontinence. For anesthesia induction, 3 cases (1 patient) was needed physical restraint, but others showed good or moderate cooperation. Drugs used for anesthesia induction was thiopental (11 cases), propofol (3 cases) and sevoflurane (3 cases). All patients received nasotracheal intubation without difficulties. Mean total anesthetic time was 3 hour 44 min ${\pm}$ 60 min and staying time at PACU was 83 ${\pm}$ 34 min. All the patients except one who showed hypertension discharged without any complication. There was no death or long term hospitalization because of severe complications. Conclusions: If general anesthesia is needed, pertinent diagnostic tests and workup about other medical problems, and appropriate anesthetic planning are essential for safety.

• 대한한방내과학회지
• /
• 제41권3호
• /
• pp.494-501
• /
• 2020

Objectives: Insomnia is a common condition that causes deterioration of cognitive function and physical function and has a negative impact on quality of life. Insomnia is experienced by more than one-third of the population of the world. Although sleeping pills are currently used as therapeutic agents, they have side effects, so safer treatment methods are needed. Therefore, we report a case of an outpatient who sleeps only one hour a day due to insomnia. Methods: The patient visited Korean Medicine Hospital 10 times for four weeks and was treated with Korean medicine therapies, including electroacupuncture on the back-Shu points and herbal medicine (Yukmijihwang-tang and Hwangnyeonhaedok-tang). Treatment progress was assessed using the Pittsburgh Sleep Quality Index (PSQI) and the Insomnia Severity Index (ISI). Results: After 29 days of treatment, the PSQI score decreased from 20 points and 14 points. The ISI score also decreased to decreased to 22 points from 26 points. The average daily sleeping time increased from 60 minutes to 197.1 minutes after treatment. No significant side effects were observed. Conclusions: Yukmijihwang-tang and Hwangnyeonhaedok-tang with electroacupuncture might be a recommended therapeutic option for insomnia patients.

• 한국염색가공학회지
• /
• 제8권3호
• /
• pp.8-15
• /
• 1996

Three pieces of cotton fabrics used for this study were exhumed in the Mt.Moo Deung near Kwang Ju in 1965. The fabrics were remains of Jang Heung Lim Si-the nephew's wife of General Kim Deok Ryeong. It was reported that Jang Heung Lim Si died in 1615. The cotton fabrics were classified into three, A, B and C, according to their color. The fabric A was inherent color of cotton, the fabric B was that of light brown and the fabric C was that of dark brown. The physical and chemical characteristics of the cotton fabrics were examined. In the meantime the construction of cotton fabrics and traditional dyeing of Yi dynasty were studied through various records. The results were as follows: 1. According to electromicroscopic examination, the lumen in the cotton fiber had not been developed enough, therefore the quality of cotton at that time was supposed to be not so excellent. 2. The results of chemical analysis indicated that: (1) While the copper number of the cotton fabric A was similar to that of bleached cotton, that of the fabric C was extremely high. (2) The amount of methylene blue absorption was much more than that of normal cotton. (3) The content of cellulose was less than that of normal cotton. (4) The degree of polymerization was less than that of normal cotton. From the results mentioned above, it was concluded that the cotton fabrics were oxidized slowly in the closed lime coffin for a long period of time. From this process of oxidization and deterioration, the degree of polymerization was decreased through depolymerization, and carboxyl groups were produced by the oxidization at reducing end groups. 3. It was confirmed that the cotton fabric C was dyed by the juice of immature persimmon. Thus, it was inferred that the large amount of copper number of cotton fabric C was derived from phenolic OH groups of tannins having high reducing properties in persimmon.

• 한국산학기술학회논문지
• /
• 제15권5호
• /
• pp.3231-3239
• /
• 2014

1970~1980년대의 급격한 경제개발과 도시의 발전 이후 현재에 들어 당시에 개발된 원도심지의 노후화와 기존기능이 빠르게 빠져나가는 도심공동화 현상이 발생하면서 근래에 도시재생이 도시계획 및 도시개발의 새로운 키워드로 등장하였다. 천안의 구도심인 명동지역(중앙동, 문성동)또한 공동화 현상이 급격하게 진행되면서 천안시에서는 재개발 및 활성화 사업을 진행하였지만 효과를 거두지 못하고 있다. 이에 본 연구에서는 이론적 고찰을 통해 도시재생 및 TOD개발 관련 사례를 분석해보고 명동지역의 현황분석을 통해 명동지역의 발전 및 공동화 이유와 기존 활성화 사업의 문제점을 분석하였다. 이를 바탕으로 명동지역의 새로운 활성화 계획을 제안하였다. 활성화 계획의 내용을 요약하면 다음과 같다. 1)명동지역의 경우 버스터미널과 천안역, 중앙시장까지 어우르는 도시흐름을 형성하는 하나의 결절점으로 고려되어야 하며, 2)민자역사유치, 지하상가와 연결된 쇼핑루트 개발, 통합 환승센터 및 이를 중심으로 한 마켓단지조성, 동남구청 부지의 문화센터 개발 및 예술공원 등의 개발이 서로 연계하여 이루어져야 한다.

• Earthquakes and Structures
• /
• 제17권5호
• /
• pp.511-519
• /
• 2019

The concrete gravity dam is one of the most important parts of the nation's infrastructure. Besides the benefits, the dam also has some potentially catastrophic disasters related to the life of citizens directly. During the lifetime of service, some degradations in a dam may occur as consequences of operating conditions, environmental aspects and deterioration in materials from natural causes, especially from dynamic loads. Cumulative Absolute Velocity (CAV) plays a key role to assess the operational condition of a structure under seismic hazard. In previous researches, CAV is normally used in Nuclear Power Plant (NPP) fields, but there are no particular criteria or studies that have been made on dam structure. This paper presents a method to calculate the limitation of CAV for the Bohyeonsan Dam in Korea, where the critical Peak Ground Acceleration (PGA) is estimated from twelve sets of selected earthquakes based on High Confidence of Low Probability of Failure (HCLPF). HCLPF point denotes 5% damage probability with 95% confidence level in the fragility curve, and the corresponding PGA expresses the crucial acceleration of this dam. For determining the status of the dam, a 2D finite element model is simulated by ABAQUS. At first, the dam's parameters are optimized by the Minitab tool using the method of Central Composite Design (CCD) for increasing model reliability. Then the Response Surface Methodology (RSM) is used for updating the model and the optimization is implemented from the selected model parameters. Finally, the recorded response of the concrete gravity dam is compared against the results obtained from solving the numerical model for identifying the physical condition of the structure.

• 한국건설순환자원학회논문집
• /
• 제9권4호
• /
• pp.499-505
• /
• 2021

이 연구의 목적은 거푸집 종류별로 콘크리트 표면의 물리/화학적 특성을 실험적으로 조사하는 것이다. 이를 위하여 건설공사에 일반적으로 사용되는 합판 거푸집과 코팅된 합판 거푸집을 준비하였고, 추가로 콘크리트 표면 열화나 거친 표면을 모사하기 위해 사포를 부착한 합판 거푸집을 준비하였다. 콘크리트는 일반 콘크리트를 사용하였다. 콘크리트 표면 특성은 육안관찰, 주사전자현미경 관찰, 성분 이미지 맵핑, 화학성분 분석, 2차원과 3차원 표면 형상 분석, 그리고 제타 전위 측정을 통해 조사하였다. 실험결과 코팅된 거푸집과 접한 콘크리트 표면이 가장 매끄럽고, 사포를 부착한 거푸집과 접한 콘크리트 표면이 가장 거친 것으로 나타났다. 이외에도 거푸집 종류별로 표면 특성에 뚜렷한 차이가 나타났다. 다만 표면 거칠기가 화학 성분이나 제타 전위에 비하여 차이가 크게 나타났다.

• 한국육종학회지
• /
• 제43권4호
• /
• pp.318-321
• /
• 2011

벼를 상온에서 이듬해 여름까지 저장 후 밥맛에 관여하는 주요 형질들을 분석한 결과는 밥맛에 관련된 주요 요인에서 품종간 차이를 나타내었다. 특히, '영호진미'는 동일한 수분조건에서 완전미율이 높고 싸라기 비율이 낮았으며, 단백질 함량이 낮고 밥의 윤기치도 높았다. 밥의 물리적 특성면에서 경도는 낮고 찰기가 높았다. 또한 보온밥솥에서 보관 후 황색도가 낮고, 갈변화가 적은 품종이었다. 식미 관능검정에서도 다른 품종보다 밥맛이 우수한 품종이었다.

• 한국산학기술학회논문지
• /
• 제20권7호
• /
• pp.102-110
• /
• 2019

본 연구는 건강보험공단의 기준에 의해 부분도움 또는 완전도움이 필요한 등급을 받은 정신적, 신체적 기능장애를 가진 노인을 대상으로, 고무의 탄성을 이용하여 관절과 근육이 무리를 덜 주는 저항성 운동프로그램들 개발하고, 이 운동이 노인의 보행능력, 균형능력 및 근력 향상에 미치는 효과를 분석한 연구이다. 경기, 충청권의 주간보호센터 세 곳을 대상으로 노인들 58명에게 12주간의 운동 프로그램을 진행한 후, 운동 참여 전과 후의 수치에 대해 종속 t-검증을 실시하였다. 그 결과 전체 참여자들이 보행능력, 균형능력, 근력에서 평균적인 향상을 보였다. 특히 모든 등급에서 검증된 균형능력의 유의한 향상(p<.01)은 균형능력이 일상생활 능력을 향상시키고 낙상 위험을 감소시킨다는 측면에서 노인 삶의 질 향상의 의미가 크다고 할 수 있다. 따라서 본 운동프로그램을 전체 노인으로 대상을 확대하고 활성화시킨다면, 건강한 노인이 치료가 필요한 취약계층으로 이동하는 것을 방지하고 허약노인이 장애노인으로 진행되는 것을 지연시킬 수 있어 개인적, 국가적 손실을 최소화할 수 있는 예방적 방법 중 하나가 될 것으로 기대된다.

• 식품과학과 산업
• /
• 제50권2호
• /
• pp.12-26
• /
• 2017

Processing steps such as washing and cutting, involved in preparing fresh-cut produce causes tissue damage, leading to rapid quality deterioration. Major defects of fresh-cut produce are discoloration, softening, off-odor development, and microbial growth. Packaging of fresh-cut produce has been changed to reduce these quality problems. Flexible packaging film is widely used to pack fresh-cut produce. Vacuum packaging was the popular packaging method in the beginning of fresh-cut industry in Korea. Vacuum packaging creates high $CO_2$ and low $O_2$ levels to control browning of fresh-cut produce. However, these conditions induce some visual defects and off-odor development. Discoloration problem was also found when fresh-cut produce was packaged with conventional packaging film or plastic tray. Modified atmosphere (MA) packaging is effective for prolonging shelf-life of fresh-cut produce by decreasing $O_2$ and increasing $CO_2$ concentration in the package. Retail MA packaging using different oxygen transmission rate (OTR) film and micro-perforated film has started to be applied to fresh-cut produce in Korea. Proper MA package design that provides optimum range of $O_2$ and $CO_2$ partial pressures is one of the major challenges in the industry. An initial package flushing with $N_2$ or an low $O_2$/high $CO_2$ atmosphere is also used to more rapidly establish steady-state MA condition. Film OTR and $O_2$ flushing affects the fermentative volatile production, off-odor development, electrolyte leakage, discoloration, $CO_2$ injury, microbial population of fresh-cut produce. There is also a demand for convenient packaging to attract consumers. Rigid fresh-cut produce container for retail market has increased since the packaging provides excellent protection from physical damage during transport. Rigid tray used as actual serving vessel for the consumer is increasing in Korea. The tray with flexible lid to wrap or seal fresh-cut produce is more and more gaining popularity. Further practical technology to control quality change and microbial growth for each fresh-cut product has been studied since various fresh-cut items were required. The fresh-cut industry also focuses on searching for more convenient and environmentally friendly packaging.

• 한국축산식품학회지
• /
• 제42권3호
• /
• pp.372-388
• /
• 2022

Insects have long been consumed by humans as a supplemental protein source, and interest in entomophagy has rapidly increased in recent years as a potential sustainable resource in the face of environmental challenges and global food shortages. However, food neophobia inhibits the widespread consumption of edible insects, despite their high nutritional and functional value. The own characteristics of edible insect protein such as foaming properties, emulsifying properties, gelling properties and essential amino acid ratio can be improved by drying, defatting, and extraction. Although nutritional value of some protein-enriched bread, pasta, and meat products, especially essential amino acid components was increased, replacement of conventional food with edible insects as a novel food source has been hindered owing to the poor cross-linking properties of edible insect protein. This deterioration in physicochemical properties may further limit the applicability of edible insects as food. Therefore, strategies must be developed to improve the quality of edible insect enriched food with physical, chemical, and biological methods. It was presented that an overview of the recent advancements in these approaches and highlight the challenges and prospects for this field. Applying these strategies to develop insect food in a more familiar form can help to make insect-enriched foods more appealing to consumers, facilitating their widespread consumption as a sustainable and nutritious protein source.