• Journal of Environmental Science International
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• v.25 no.8
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• pp.1097-1105
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• 2016

The present study was performed to investigate the psychological effects of spring flowers blossoms, which is one of the elements influencing to human psychology, in order to provide scientific evidence on the psychological benefits of green plants. A self-reporting survey was conducted by using self reporting questionnaires on the impression (semantic differential method: SD method) and mood states (profile of mood states: POMS) of eighty university students in their twenties. Korean forsythia, Korean rosebay, Japanese apricot, Cherry blossom, and Magnolia were chosen as spring flowers. The results of impression evaluation and mood states changes showed that spring flower blossom had beautiful, soft, warm, moist, familiar and full impressions, and changed our mood positively by reducing depression and anger, or by increasing vigor. In addition, different psychological effects can be differently observed depending on the species; for example, Cherry blossom had a greater effect in changing the impression and feeling than others. The findings would provide support toward the active usage in green space as well as its design maximizing the psychological effects of nature.

• Korean Journal of Plant Resources
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• v.33 no.5
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• pp.476-481
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• 2020

In this study, we report a unrecorded plant on the Korean peninsula, Potamogeton × anguillanus Koidz. from Yeondangcheon (stream) in Yeondang-ri, Nam-myeon, Yeongwol-gun, Gangwon-do province. Potamogeton × anguillanus is a natural hybrid between P. wrightii Morong. and P. perfoliatus L. It is distinguished by its characteristic that the petiole is shorter than P. wrightii and that the leaf blade is narrower and longer than P. perfoliatus also, it didn't fully wrap the stem. Considering that P. × anguillanus is a natural hybrid, the name is given to it as 'Eol-chi-gi-dae-ga-rae'. We provide descriptions of the morphological characteristics, photographs, and key to allied taxa in Korea of P. × anguillanus.

• Journal of the Korean Institute of Electrical and Electronic Material Engineers
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• v.29 no.4
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• pp.205-209
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• 2016

In this paper, piezoelectric ceramics with the composition of $(Na_{0.525}K_{0.4425}Li_{0.0375})(Nb_{0.8975}Sb_{0.065}Ta_{0.0375})O_3+0.3wt%\;CoO+x\;CuO$ ($0.005{\leq}x{\leq}0.025$) (abbreviated to NKL-NST) were fabricated for ultrasonic sensor application. The effects of CuO addition and sintering on the microstructure and the piezoelectric properties of the NKL-NST ceramics were systematically studied. Excellent piezoelectric properties such as electromchanical coupling $factor(k_p)=0.415$, piezoelectric constant $(d_{33})=166pC/N$ and piezoelectric figure of merit $d_{{33}*}g_{33}=5.47pm^2/N$ were obtained from the 2.5 mol% CuO doped NKL-NST+0.3 wt%CoO ceramics sintered at $1,000^{\circ}C$ for 3 h.

• Proceedings of the Earthquake Engineering Society of Korea Conference
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• 1997.04a
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• pp.77-87
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• 1997

The earthquake data(M$\geq$4.0) for post-1900 in the Korean Peninsula show temporal variation with active and quiet periods. The pattern is quite similar to northeastern China and Inner Zone of Southwest Japan. Yeongweol earthquake occurred in the seismic gap region of the Korean Peninsula. This is the first medium-size earthquake in inland region of the southern peninsula since 1978. The intensity based on the felt area estimation of about 400 places shows MMI III-Ⅷ in inland region. IIon Cheju Island and Ion Ulreung Island. The isoseismal of MMI Ⅶ shows an elongated circle in the direction of NE-SW and covers some parts of Jungdong-myon, Yeongweol-kun, Sindong-eup and Nam-myun, Jeongseon-kun. There occurred quite strong shaking, numerous cracks on the walls of buildings, falling and movement of slate and tiles on the roofs, falling of tiles from the wall and falling of materials from desks, rook falling from mountain and collapse of gravel lauers on the river side. The least square fitting of the intensity data of the Yeongweol earthquake by a popular intensity attenuation relation yields the following : I=Io＋1.82249 - 0.65295*InR - 0.00707*R

• Journal of Climate Change Research
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• v.8 no.4
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• pp.287-295
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• 2017

This paper provides a mathematical approach for estimating flood risks due to the effects of climate change by developing a one dimensional (1D) hydraulic model for the mountainous river reaches located close to the Yeongwol thermal power plant. Input data for the model, including topographical data and river discharges measured every 10 minutes from July $1^{st}$ to September $30^{th}$, 2013, were imported to a 1D hydraulic model. Climate change scenarios were estimated by referencing the climate change adaptation strategies of the government and historical information about the extreme flood event in 2006. The down stream boundary was determined as the friction slope, which is 0.001. The roughness coefficient of the main channels was determined to be 0.036. The results show the effectiveness of the riverbed widening strategy through the six flooding scenarios to reduce flood depth and flow velocity that impact on the power plant. In addition, the impact of upper Namhan River flow is more significant than Dong River.

• Animal Systematics, Evolution and Diversity
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• v.37 no.1
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• pp.19-25
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• 2021

Soldanellonyx monardi Walter, 1919, a halacarid species is newly recorded from South Korea, as the second member for the freshwater halacarid mites in Korea after S. chappuisi Walter, 1917 reported from Gossi-gul Cave, a limestone cave at Yeongwol in 1968. It was collected from three wells in the southeastern part of Korean peninsula this year. Korean specimens are well accorded with S. monardi s. str. in having telofemur I less than 1.5 times longer than wide, two spiniform setae on the ventral side of tibia I, relatively longer anterior dorsal plate (slightly longer than its width and about half the length of posterior dorsal plate), and the posterior epimeral plates lacking a dorsal seta. Based on the Korean specimens, a brief table for the morphological differences between adult females and deutonymphs are provided, which shows a tendency of rather consistent increment according to growth in the number of spiniform dorsal setae on telofemora and genua of legs I and II, the number of perigenital setae, and the number of genital acetabula. In this paper, detailed redescription and a brief table for the morphological differences between adult females and deutonymphs of S. monardi are provided.

• Korean Journal of Materials Research
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• v.32 no.1
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• pp.23-29
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• 2022

Fly ash is a by-product of coal fired electrical power plants and used as a material for cement and concrete; particularly, imported fly ash is mainly applied for cement production. Main objectives of this article are to replace domestic fly ash with an imported source. To verify the possibility of domestic fly ash as a material for cement from the aspect of chemical composition and physical properties, we manufactured various kinds of cement, such as using only natural raw material, shale, and partial replacement with domestic and imported fly ash. When we used the domestic and imported fly ash, there were no specific problems in terms of clinker synthesis or cement manufacturing in relation to the natural material, shale. In conclusion, domestic fly ash has been confirmed as an alternative raw material for cement because 7 days and 28 days compressive strength values were better than those of reference cement using natural raw material, on top of the process issue.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2020.12a
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• pp.59-59
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• 2020

Salix gracilistyla has a characteristic of fast growth especially in the river side or infertile soil, showing a lot of lateral branches and a strong root system among the Salix. spp. On the basis of results observed, we provide several growth characteristics of S. gracilistyla among some selected provenances. In two-year results, root collar diameter ranged from 33.5 mm to 56.7 mm. Taeback showed the lowest value, and Jeongseon and Hoengseong were higher than the other areas in the traits above. Height growth was the lowest in Samcheok and the highest in Wonju. To examine growth and development of lateral branches is important because S. gracilistyla has a lot of lateral branches which account for high biomass production. Length of lateral branch showed high variation, in which the highest number was observed in Yeongwol and the lowest in Samcheok. Many lateral branches were shown in Wonju. Preliminary study on biomass resources evaluation, we analyzed correlation between volume and length, and volume and root diameter. High correlation was observed between root diameter and plant volume. And we compared the observed volume with the caculated volume by regression formula. To evaluate Salix species as biomass resources, it is needed to survey growth characteristics continuously and adopt selection of individuals or families of high biomass and caloric values by reliable data. In addition, Salix spp. can be also applicable to selection breeding regime because of feasible propagation and fast growth.

• Journal of the Korean housing association
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• v.27 no.2
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• pp.21-31
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• 2016

In recent rural areas, unlike the past, the young population is increasing with the growth of the agricultural industry and the quality of life-focused trend. Therefore, the rural areas need to more actively respond to the housing demands of the young generations. In this regard, this study aimed to research the housing conditions of the households with children and identify any problems. The study targeted 16 families with children in Deokpo-ri, Yeongwol-gun, Gangwon Province. The research was conducted based on the on-site case study, specifically face-to-face in-depth interview and on-site monitoring using the checklist by residential spaces. The research findings are as follows: The discovered issues include the storage size and safety issues in the movement space, failure to provide the space tailored to the characteristics of the children and the insufficient size and storage space in the living space and the size and safety issues in the sanitary space. Overall, it was identified that small and insufficient storage space in the house pointed out as the main issue in this research was getting the residents' life more uncomfortable and unreasonable, and the activities of the children made their parents do unnecessary behaviors and stressed out during the process of childrearing. Therefore, it is necessary to consider the space arrangement considering the organizing system, caring system and the behavioral characteristics of the children during the process of child-rearing.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.58 no.2
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• pp.161-168
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• 2013

Soybean cyst nematode (Heterodera glycines Ichinohe) is one of the serious soybean [Glycine max (L.) Merr.] pests in major soybean producing countries. The objective of this study was to investigate of Heterodera glycines type using the five SCN infested soybean field soils and was to evaluate resistance to the soybean cyst nematode HG 2.5.7 type on soybean varieties and germplasms. The five SCN contaminated soil samples were collected from the three provinces on November 2011 in Korea, and eggs were cultured on early spring season in 2012. For the second study, a total fifty nine soybean varieties and germplasms were tested by infestation of HG type 2.5.7 in the greenhouse. Soybean cyst nematode HG types were investigated from five locations, HG 2 (race 1) type at Donghae, HG 2.5 (race 1) type at Jeongseon and Hapcheon, HG type 2.5.7 (race 1 or 5) at Yeongwol, and HG 1.2.7 (race 5) type at Haenam locations in present study. No Korean soybean varieties and germplasms were observed with SCN resistant trait to the HG type 2.5.7. Average SCN female index were calculated with 82.7% in 59 plant materials. Our results could be provided useful information to develop a SCN resistant cultivar in Korea.