• 한국환경과학회지
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• 제22권11호
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• pp.1415-1419
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• 2013

This study was conducted to investigate the seasonal variation characteristics of phytoncide in trail of Ulsan Metropolitan. Air samples were collected from May to December 2011. They were collected using Tenax Ta tube and phytoncides were detected and quantified using a Gas Chromatograph Mass Spectrometer (GC/MSD). This study are summarized as follows; The seasonal concentrations of phytoncide are Munsu Mt. 272.3 ${\mu}g/m^3$, Samho Mt. 192.4 ${\mu}g/m^3$, Shinbul Mt. 50.9 ${\mu}g/m^3$, Sibli Bamboo forest 22.4 ${\mu}g/m^3$ and Joongbu Fire Station 24.4 ${\mu}g/m^3$. In Munsu Mt., Samho Mt. and Shinbul Mt. major component ratio is ${\alpha}$-Pinene > ${\beta}$-Pinene+Myrcene >Limonene >Camphene > ${\gamma}$-Terpinene > ${\alpha}$-Terpinene. Bamboo forest and Joongbu fire station major component ratio is ${\alpha}$-Pinene >Limonene > ${\beta}$-Pinene+Myrcene >Camphene > ${\alpha}$-Terpinene. The variation of seasonal concentration is summer >spring >fall >winter. The phytoncide concentration of coniferous forest(Munsu Mt., Samho Mt.) is higher than broadleaf forest(Shinbul Mt.).

• Environmental Engineering Research
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• 제14권2호
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• pp.88-94
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• 2009

In this study an attempt has been made to predict the annual foggy days over Gyeongsangbuk-do of Korea, using the regional mesoscale model (MM5). The annual meteorological conditions are simulated, and the annual and seasonal foggy days are predicted from the simulated results based on the seasonal and spatial information of the observed meteorological characteristics for fog occurrence such as wind speed, relative humidity, and temperature. Most of observed inland fog over Gyeongsangbuk-do occurs in autumn under the meteorological conditions such as a cairn, a high temperature range (above $10^{\circ}C$), and a high relative humidity (above 85%). The predicted results show the various foggy days, about 10${\sim}$60 days, depending on the season and the site locations. The predicted annual foggy days at inland sites are about 30${\sim}$60 days, but at coastal sites, about 10${\sim}$20 days. Also, a higher frequency of fog occurrence at inland sites is shown in autumn (about 60% of the annual foggy days). Otherwise, a higher frequency of fog occurrence at coastal sites is shown in summer (about 60% of the annual foggy days), unlike the inland. These annual foggy days and their seasonal variations agree reasonably well with the observed values. It can be concluded that it is possible to predict the occurrence of annual or seasonal foggy days by MM5.

• 수산해양기술연구
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• 제42권3호
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• pp.158-168
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• 2006

A study on the species composition and seasonal variations of fishery creatures caught by a funnel net was carried out in the coastal water off Dolsan Island, Yeosu from 2002 to 2003. During the study period, a total of 23 fishery creatures species were caught. Seabream(Acanthopagrus schlegeli), sea bass(Lateolabrax japonicus), mullet(Mugil cephalus), puffer(Takifugu niphobles) and rockfish(Sebastes inermis) predominated. These five species accounted for 85.1% of the total number of fishery creatures caught. Seasonal peaks of number of species occurred in summer, while those of number of individuals occurred in autumn. The lowest number of species and individuals were observed in winter. The large annual variation of diversity indices were observed from May to August. These large annual variation of diversity indices were mainly due to predominance of seabream, sea bass and mullet which accounted for most of all fishery creatures caught. The seasonal variations of fishery creatures showed that sea bass and mullet were caught mainly from spring to summer, seabream and puffer were caught mainly in autumn, and rockfish and brotula(Hoplobrotula armata) were caught mainly in winter.

• Ocean and Polar Research
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• 제32권3호
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• pp.187-201
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• 2010

The purpose of this study was to investigate the temporal and spatial variability of taxonomic groups and major species of the mesozooplankton community in Lake Shihwa, Korea. Monthly collections were carried out at five stations in Lake Shihwa for a period of one year. The mesozooplankton community showed distinct seasonal variability with water temperature and salinity. Major mesozooplankton species in each seasonal community were derived from non-metric MDS and SIMPER as follows: winter community (Acartia hongi and Eurytemora pacifica), spring community (Acartia hudsonica and Polychaeta larvae), summer community (Acartia sinjiensis, Pavocalanus crassirostris, Evadne tergestina and Cirripedia nauplii) and fall community (Paracalanus indicus and Podon leuckarti). The succession of the seasonal species, A. hudsonica and A. sinjiensis, was the most remarkable event during the seasonal changes of the mesozooplankton community. The species response curve of these species fitted with the logistic regression in relation to water temperature and salinity. The curve also correctly represented the characteristics of the occurrence of A. hudsonica and A. sinjiensis in Lake Shihwa.

• 유기물자원화
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• 제18권4호
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• pp.54-63
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• 2010

우리나라는 MBT시설의 설계 시 국내 실정에 맞는 관리 시스템 구축이 미흡하고 계절적 변동에 따른 발전 설비 부하의 변화량을 해소하지 못하고 있는 상황이다. 따라서 본 연구는 MBT시설의 도입으로 인한 새로운 생활폐기물 관리 시스템 구축을 구축하고 계절별 생활폐기물 성상 및 배출 특성과 발전 설비 부하의 변화량 해소를 위해 추가 열적 완충재의 발열량을 검토하였다. 이번 연구 결과 MBT시설의 선별효율 및 조성별 폐기물의 물리적 특성을 알 수 있으며, 또한 MBT시설의 계절적 변동에 따른 발열량을 추가 열적 완충재를 이용함으로서 사계절 내내 일정하게 유지 할 수 있을 것으로 판단된다.

• 대한한의학회지
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• 제40권2호
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• pp.133-141
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• 2019

Objectives: The condition of the skin is greatly influenced by seasonal changes. We wanted to know the seasonal change of skin condition and to find out the difference in the efficacy of Seoshiokyongsan (SSOOS) CP soap in spring and autumn. We are to help people who use soap to make a wise choice in choosing a cleanser according to the season. Methods: To investigate the seasonal skin condition, this experiment was conducted to examine the skin condition of spring and autumn in 20 students at A university. To compare the seasonal efficacy of Seosiokyongsan (SSOOS) CP soap, we had skin test 10 students in spring and autumn. We made herbal fermented soaps using SSOOS and distributed them to experiment participants. We let them wash their face in the morning and evening for 6 weeks using herbal fermented soap. Prior to the experiment, their skin condition was checked and assessed using A-ONE Smart One-Click Automatic Facial Diagnosis System three times at 3-week intervals. After the experiment, the changes of skin were measured and analyzed through facial analysis test. Results: In spring and autumn, the oil of T zone and U zone was significantly less and the water content was significantly higher in autumn than in spring. In the case of using the SSOOS CP soap, water content increased and oil content decreased in spring, oil content and elasticity increased in autumn. Conclusion: There is a difference in the skin condition according to the season and SSOOS CP soap showed difference in efficacy in spring and autumn. So we should pay attention to seasonal soap selection.

• 한국초지조사료학회지
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• 제30권1호
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• pp.67-76
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• 2010

본 연구는 춘파 야생화초지의 생육특성, 계절개화분포 및 식생비율을 구명하고자 시험하였다. 공시초종은 기본초종인 잔디형 목초로 Sheep fescue (Azure), 야생화 초종으로는 국내산 야생화 4종과 외국산 야생화 29종 등 총 34종을 공시하였다. 시험은 충남대학교 초지시험 포장에서 2008년 3월부터 2009년 12월까지 수행하였으며, 얻어진 결과는 다음과 같다. 야생화의 초장은 8~60 cm 범위로 상하 공간배치는 양호한 편이었으며, 꽃색은 9가지로 다양하게 개화되었으나 8월, 9월 및 10월에는 1~3가지로 편중되었다. 개화는 5~6월에 편중되었고 8월부터는 야생화의 개화 및 영속성 유지가 상당히 어려웠다. 그러나, 2년차(2009)에는 월동 후 일년생 야생화초종의 식생 감소로 야생화의 꽃색, 계절분포 및 영속성이 문제시 되었다. 야생화초지의 연평균 식생비율은 야생화, 잔디형 목초 및 잡초가 각각 1년차(2008)에는 24%, 62% 및 14%이었고, 2년차(2009)에는 각각 16%, 69% 및 15%를 유지하였다. 이상의 결과로 보아 춘파 야생화초지의 경우, 파종당년보다는 2년차에 야생화의 꽃 색, 계절개화분포 및 영속성을 유지할 수 있는 방안이 중요하다고 하겠다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년도 제37회 하계학술대회 논문집 A
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• pp.500-501
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• 2006

Ground resistance is very important element in distribution line of multi-grounded system. Therefore, use several kind of ground electrode materials to get ground resistance. In this study, examine about characteristics of seasonal variations of ground resistance by several kind of ground electrode material that is used to ground electrode of distribution line, and compares and evaluated characteristics of each ground electrode material.

• 한국대기환경학회:학술대회논문집
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• 한국대기환경학회 1999년도 춘계학술대회 논문집
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• pp.214-215
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• 1999

• 한국지구과학회:학술대회논문집
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• 한국지구과학회 2002년도 춘계학술발표 논문요약집
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• pp.45-46
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• 2002