• 한국유기농업학회지
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• 제12권2호
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• pp.171-181
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• 2004

A study was conducted to investigate the effect of supplementing earthworm meal (EWM) on the performance of spent laying hens after induced molting, and fatty acid composition in egg yolks. A total of 90 laying hens at 73 weeks of age were fed the experimental diets containing 0.0% (Control) and 0.2% of EWM for 4 weeks. Eggs were collected and weighted every day and Egg production and feed conversion were recorded every week during the experimental period. However fatty acid composition of egg yolk were measured at last week of experimental period. An amount of feed intake increased by supplemental with EMW except for Erst week experimental period (P<0.05). When 76 and 77 week of age, egg production and daily egg mass were improved by the supplemented with EWM (P<0.01), but average egg weight was not different when fed a EWM, therefore feed/egg mass was significantly decreased when fed a EWM. The ratio of egg yolk n-6/n-3 fatty acids contents was significantly improved fed a EMW (P<0.05). It is concluded that supplementing 0.2% of earthworm meal in the spent laying hens after induced molting was fast in recover of physical strength, therefore improves laying performance.

• 한국농촌건축학회논문집
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• 제10권4호
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• pp.1-8
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• 2008

The policy that do so the Geritol generation with advanced age generation's increase may be not estranged and can human down life is necessary times. The Medical treatment and welfare service is essential, and the aged support domiciliary care facility in the rudiments step more expand must. It is real condition that Kangwon-do's number of closed school appears by many things thirdly in whole country and the post management countermeasure is urgent. Because this research chooses the closed school by way to solve the closed school problem that happen by the child of school age decrease the farming and fishing villages or small city and the shortage problem of old people's welfare facilities by population graying at the same time. There is the purpose to grope practical use the possibility of local closed school as welfare center for the old who stay at home present remodeling to welfare facilities for the old man. Keeping the structure condition of a closed school maximum, the welfare center for the old who stay at home by remodeling a closed school ultimately proposed.

• 한국기계가공학회지
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• 제12권2호
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• pp.49-54
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• 2013

Recently welding of aluminum material is actively carried out to make lightweight in the fields of LNG vessels, aircraft, chemical plants, etc. To obtain high strength, hardness and elongation, elements such as manganese, zinc, silicon, etc should be added in aluminum alloy, which has been improved on the mechanical properties like precipitation hardening, age hardening, loosening, corrosion resistance acid resistance. Ar gas is used as a shielding gas of MIG welding for aluminum, also $N_2$, $O_2$, $CO_2$, $H_2$ etc can be added depending on the composition of the alloy. In this study, Ar + $O_2$, Ar, and He were used for welding, hardness, penetration status and changes in composition of penetrated parts were compared and analyzed. This made it possible to know the status and changes of the process in the penetrated parts depending on used gas throughout this study.

• 한국식품영양과학회지
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• 제22권5호
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• pp.592-595
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• 1993

인삼의 재배년근별, 국내산지별 및 국가별 무기물의 분포를 조사하기 위하여 시험한 결과 Mn은 2년근에 비하여 5년근에서 4배 가까운 증가추세를 나타내었다. 재배산지별로 볼때 P은 각 지역별로 큰 차이를 나타내지 않았다. 한편 각국 인삼별로는 중국 천칠삼에서 N의 함량이 적제 나타났으며 P은 한국산 정상홍삼에서 가장 높게 나타났다.

• 한국식생활문화학회지
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• 제14권4호
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• pp.371-383
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• 1999

본 논문은 한일 양국의 가계에 있어서의 식품수요에 미치는 요인을 파악하기 위해서 종래의 수요모델에 코호트(cohort, 행동을 같이 한 집합체) 분석적인 생각을 도입하여 한일 양국의 식품수요 형태분석을 하였다. 여기에 제시한 새로운 수요분석 모델은 소비지출과 가격이 식료수요에 미치는 경제적 효과 이외에 세대주 연령효과나 출생연도와 같은 비경제적효과 등도 계량한 것이 특징이다. 분석한 결과를 요약하면 다음과 같다. 1. 한일 양국의 식품수요의 품목군별 탄력성을 보면 유지류, 음료, 조리식품의 수요탄력성은 한국보다 일본이 더 탄력적이었지만, 다른 모든 품목은 일본보다 한국이 탄력적이었다. 곡류, 육류, 외식의 외부화 식품의 소비지출과 가격탄력성은 한국의 큰 품목과 일본의 큰 품목이 서로 상충하고 있어서 일정한 경향 파악이 곤란하다. 그러나 신선식품에 대한 소비지출과 가격의 탄력성은 모두 일본보다 한국이 크다. 2. 식품에 대한 지출액은 세대 구성원의 연령을 반영하여 비교하여 볼 때 한국과 일본의 결과가 비슷하였다. 즉 세대주 연령이 젊은 계층의 가족에는 유아가 있기 때문에 유란류의 지출액이, 또한 중년층에서는 청소년이 많기 때문에 과자류의 지출액이 다른 연령계층에 비하여 많았다. 한국은 연령계층이 높을수록 2세대 가족이 많기 때문에 다수 품목에 지출액이 많고, 일본의 중년층은 과자류를 포함하여 특히 곡류, 육류 등의 에너지 식품이나 외식의 지출액이 많다. 그러나 연령이 높은 계층에서는 세대 구성원이 거의 성인이며 평균연령이 높기 때문에 곡류, 육류, 외식 등의 지출액이 적었지만 어패류, 야채류 등의 전통식품이나 조리식품의 지출이 많았다. 3. 식품소비의 패턴은 세대주 출생연도별로 비교하면 한일 양국 모두 구세대일수록 주식 중시의 경향을 나타내고 신세대일수록 축산물, 유지류, 외부화 식품의 비중이 높았다. 그러나 품목 구성의 세대간 차이는 한국에 있어서는 매우 크지만 일본의 경우는 비교적 작았다. 따라서 식생활의 서구화, 외부화는 세대교체에 동반하여 한국에는 급속히 진행하지만 일본은 점진적으로 진행한다고 볼 수 있다. 4. 가계 식품 수요의 장기 변화에 미치는 요인은 소비지출, 가격, 세대주 출생연도, 연령 등의 네 가지 요인으로 나누어서 각각의 효과를 요인간으로 비교하면 한일 양국이 함께 가격의 효과가 가장 작다. 그러나 그 이외 요인별 효과의 상대적 중요성은 양국간에 다른데 한국은 소비지출의 효과가 출생연도나 연령 효과보다 크지만 일본은 경제적 요인인 소비지출보다 세대주의 출생연도나 연령 등의 비경제적 요인의 효과가 크다.

• 자원환경지질
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• 제19권spc호
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• pp.151-162
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• 1986

The older granitic rocks of the study area are composed of mainly orthogneiss and foliated granite. These rocks shows mostly mortar or fiaser structure by strong mylonitization and thermal metamorphism during several orogenies. $^{40}Ar-^{39}Ar$ incremental·release ages of these rocks have been determined for 6 hornblende. 7 muscovite and 4 biotite concentrates separated from rocks collected across the Ryeongnam massif. Most $^{40}Ar-^{39}Ar$ age are discordant with Rb-Sr whole rock age of the same area. These ages range from 1998 to 172Ma. This discordant age is interpreted to indicate that samples were in contact with Daebo granite body that was characterized by large and variable $^{40}Ar-^{39}Ar$ ratios. Such ratios most likely resulted from widespread diffusion of the argon liberated from older granitic rocks during several metamorphic overprint. The general trend of the chemical composition of these rocks suggest that most of them are some series of differentiated products by fractional crystallization.

• Asian-Australasian Journal of Animal Sciences
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• 제24권6호
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• pp.881-887
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• 2011

Feathers are one of the integument appendages that form the outer covering, or plumage, on birds. The goslings hatch with a downy coat of feathers formed in embryonic development. They moult the natal plumage into juvenile feathers between 3-5 weeks of age and than moult that juvenile plumage into adult plumage between 8-11 weeks of age. Feather weight of an adult goose makes up about 6.2% of its total body weight. Heritability of the feather production ability is relatively low ($h^2$ = 0.35). Within species or genotype, the quantity and composition of the plumage are affected by genetics (age, body weight or body surface area, feathering rate, sex) and environmental factors (nutrition and production system, weather, microclimate). After slaughter some 90-220 g marketable feathers can be obtained per goose. The yield of feathers and down from each hand-harvesting amounts to between 80 to 120 g per goose, depending upon the frequency and degree of completeness of the harvesting.

• 한국생활과학회지
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• 제15권1호
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• pp.1-15
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• 2006

The purpose of this study is (1) to investigate how children's peer interaction type and joint problem-solving performance differ, depending on a partner's age, in such a situation as they are asked to solve problems with their peer and (2) to investigate relationship between children's peer interaction type and joint problem-solving performance. Results reveal that children's problem-solving performance receives more benefit in the interactions with older peers, rather than those with younger ones. It can also be improved by higher level of collaborative interactions such as abstract collaborative explanations in joint activities. It is influenced positively by collaborative interactions, expecially when the children are in the same age groups. Results here were discussed in terns Piagetian and Vygotskian theories.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2004년도 Proceedings of ISRS 2004
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• pp.14-16
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• 2004

Although there have been wide range of studies to characterize forest stands based upon spectral information of satellite image, it was not fully understood the texture information of forest stand using high resolution data. The objective of this study is to evaluate several texture measures for characterizing forest stand structure, such as species composition, diameter at breast height(DBH), stand density, and age. High resolution IKONOS satellite imagery data were acquired in August 200 lover the forested area near Ulsan, Korea. Primary forest types were plantation pine, mixed forest, and natural deciduous forest of stand age ranging from 10 to 50 years old. Several GLCM-based texture measures were compared with forest stand characteristics. In overall, a texture measure (contrast) calculated using red band were better to differentiate species and age group than other texture measures and near infrared bands.

• 수면정신생리
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• 제14권1호
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• pp.5-12
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• 2007

Sleep changes substantially with age. There is a phase advance in the circadian sleep cycle and increased waking after sleep onset. The elderly people wake more frequently during the night and experience fragmented sleep and excessive daytime sleepiness. The prevalence of sleep disorders increases with age, and the composition of sleep disorders in the elderly differs from that in the young. The most frequently encountered sleep disorders are psychophysiologic insomnia, sleep disturbance due to dementia, sleeprelated respiratory disorder, restless legs syndrome and periodic limb movement disorder, and REM sleep behavior disorder. To treat the elderly sleep problem appropriately, it is important to know how sleep pattern changes as we age and to understand the cause of sleep-related symptoms. This article will review the sleep physiology and common sleep disorders in the elderly.