• International journal of advanced smart convergence
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• 제11권3호
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• pp.170-178
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• 2022

Purpose: Gardening has been reported to have positive emotional and physical effects in older adults. However, limited studies have assessed this relationship in Korea. Therefore, in this pilot study of densely populated urban dwellers, we aimed to investigate whether temporary but repeated experiences of the natural environment could positively change metabolism-related blood indicators. Methods: This study used pre- and post-interventional designs to investigate the effects of 16 weeks of gardening on lipid profiles in an urban adult population and investigate their relationships. This study was conducted 30 times at the H Botanical Garden in Yongin City from August 16, 2021 to November 30, 2021 (16 weeks, twice a week, 3 hours each time). Before and after the gardening program, a clinical pathologist collected blood samples from the participants. Results: High-density lipoprotein levels increased, low-density lipoprotein levels decreased, and total cholesterol levels decreased after the gardening activity. Conclusions: Our findings suggest that gardening has potential for clinical application as it has good control over the lipid profile through physical activity. These findings can be used as basic data for studying the relationship between urban populations and their living environment and for various studies in the future as experiencing the natural environment provides many health benefits.

• 한국산림과학회지
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• 제95권4호
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• pp.501-506
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• 2006

개벌 후의 교목류 천연갱신 과정을 연구하기 위하여 개벌상의 태풍피해를 입은 북해도 시코츠코지역 침엽수 조림지에서 1년 후에 발생된 치수를 조사하였다. 그 결과 25종의 교목류 치수가 자라고 있었으며 치수밀도는 9.8주/$m^2$였다. 그 중 1년생 치수가 87%(8.6주/$m^2$)였으며, 비동물산포종(7.2주/$m^2$)이 동물산포종(1.4주/$m^2$)보다 5배 정도 많았다. 인접한 천연림으로부터 100m이내에서는 치수 밀도가 6주/$m^2$이상이었으며 150~250m에서는 2~9주/$m^2$였다. 비동물산포종은 천연림으로부터 멀어질수록 치수발생량이 감소하였으며 동물산포수종에 비하여 밀도 변이폭이 크게 나타났다. 개벌 후 교목류의 천연갱신에서는 자작나무류와 같은 선구수종이 우점할 확률이 높다. 따라서 수종구성을 다양하게 유지하기 위해서는 경쟁을 완화시키는 보육작업이 필요하다.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2012년도 추계학술대회 논문집
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• pp.923-924
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• 2012

• 한국고분자학회지:고분자과학과기술
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• 제25권6호
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• pp.503-513
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• 2014

• 대한수학회지
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• 제55권2호
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• pp.293-311
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• 2018

We study the homotopical minimal periods for maps on infra-solvmanifolds of type (R) using the density of the homotopical minimal period set in the natural numbers. This extends the result of [10] from flat manifolds to infra-solvmanifolds of type (R). We give some examples of maps on infra-solvmanifolds of dimension three for which the corresponding density is positive.

• 한국통계학회:학술대회논문집
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• 한국통계학회 2003년도 춘계 학술발표회 논문집
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• pp.69-74
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• 2003

The estimation of pest density is a prime concern of Integrated Pest Management (IPM) because the success of artificial intervention such as spraying pestcides or natural enemies depends on pest density. Also, the spatial pattern of pest population within plants or plots has been studies in various ways. In this study, we applied generalized linear mixed model to Tetranychus urticae Koch , two-spotted spider mite count in glasshouse grown roses. For this analysis, the subject-specific as well as pupulation-averaged approaches are used.

• 한국주거학회논문집
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• 제17권4호
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• pp.111-117
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• 2006

The harmfulness of HCHO and VOCs from construction material and furniture has been increased gradually. It must be need to prevent pollution materials' accumulation indoor effectively and to remove very small amount of harmful pollution materials in various plans, because these kinds of pollution materials greatly affect human body, Therefore, this study is focused to find out the improvements of Indoor Air Quality in execution of natural ventilation and bakeout to reduce indoor chemical pollution materials or not. After effects of indoor air quality by natural ventilation and bake-out being examined, it is follows the conclusion. As for the density change of TVOC and Toluene according to time lapse, in case the middle and high-story areas have bake-out, the density increased once, but it showed the gradual decrease after bake-out was stopped, and it was shown that it exceeded the standards recommended for newly built apartment. The bake-out is effective to discharge the HCHO and TVOC from the construction material and the furniture, and the natural ventilation is effective remove the indoor pollution materials.

• 한국자동차공학회논문집
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• 제12권6호
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• pp.143-150
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• 2004

In this paper, resonant ultrasound spectroscopy(RUS) was used to determine the natural frequency of a ceramic ferrule and a ball lens. The ceramic ferrules are cylinderical shape with $\phi$ 2.56mm diameter and l0mm in length. Crack lengths of these ferrules are 10.40$\mu$m, 21.18$\mu$m and 32.35$\mu$m. The spherical ball lens was made of BK-7 glass, one's diameter in 2mm and 5mm. RUS system is consisted of spectrum analyzer, power amplifier, PZT sensor and support frame. The principle of RUS is that the mechanical resonant frequency of the materials depends on density and the coefficient of elasticity. Rus system is based on that given resonant frequency of the materials can be represented by the function of density and the coefficient of elasticity, and it is applied to excite specimen and to inspect the difference of natural frequency pattern between acceptable specimen and defective ones. Defect evaluation by RUS are performed to investigate the natural frequency measure of ferrule and ball lens.

• Bulletin of the Korean Chemical Society
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• 제33권4호
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• pp.1213-1219
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• 2012

The reorganization energy and the spectroscopic properties of 2,6-bis(5'-hexyl-thieno[3,2-b]thiophene-2'- yl)naphthalene (DH-TNT) and 2,6-bis(5'-hexyl-thieno[3,2-b]thiophene-2'-yl)anthracene (DH-TAT), which are composed of an acene unit and alkylated thienothiophene on both sides, as organic materials for display devices were calculated and the results were compared with experimental values. The lower reorganization energy of the DH-TAT over the DH-TNT calculated by the density functional theory is attributed to a smaller vibrational distortion because of the heavier building block of DH-TAT, and it shows a good field effect performance over the DH-TNT. The calculated spectra and the other spectroscopic characteristic of the compounds are well consistent with those of observed results.

• 한국응용약물학회:학술대회논문집
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• 한국응용약물학회 1995년도 춘계학술대회
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• pp.64-64
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• 1995

Cholesteryl Ester Transfer Protein (CETP) mediates the transfer of cholesterol ester and triglyceride between high-density lipoprotein (HDL) and other low-density lipoproteins, therefore, it might influence HDL levels. The levels of HDL is closely related to the atherogenic diseases in human and there were several reports that the trasgenic mice expressing CETP had much worse atherosclerosis than non-expressing control one. Therefore, selective inhibitors of CETP have the potential to be used as antiatherosclerotic agents. Continued screening for potent inhibitors of CETP led to the isolation of Suberitenone B from marine sponge. Suberitenone B, sesterterpenoids of a new skeletal class have been isolated from the sponge Suberites sp. collected from King George Island the Antartic. The structure of the metabolite has been determined by NMR experiments and chemical methods.