http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : So Ye Park (검색결과 247 건)
- 무료
- 기관 내 무료
- 유료
-
Entomopathogenic fungi-mediated biological control of red mite, Dermanyssus gallinae in field
So Eun Park,Ye Ram Im,In Soo Jeon,Yu Lim Park,Yu Jin Jeong,Sue Yeon Lee,Kim Jong Cheol,Jae Su Kim 한국농약과학회 2021 한국농약과학회 학술발표대회 논문집 Vol.2021 No.11
The red mite, Dermanyssus gallinae (Mesostigmata: Dermanyssidae), is one of the most serious pests in chicken farming and causes serious economic losses. Overuse of chemical insecticides has caused pest resistance as well as environmental residual toxicity to chickens and eggs. Therefore, given the warm and humid conditions of chicken farms, alternative application with entomopathogenic Beauveria bassiana was investigated to control D. gallinae. Based on the characterization and virulence assays of B. bassiana isolates against red mite, a red mite-pathogenic fungal library was constructed. A total of highly virulent six B. bassiana isolates were selected from the virulence screening and tested fungal virulence, conidial production, and thermotolerance. JEF-410 considered to be the best candidate for industrialization showed a dose-dependent virulence against red mite nymphs. JEF-410 conidia from millet granule-based mass culture were applied to a commercial chicken farm and it showed a significant suppression of population increase under high humidity conditions. In conclusion, B. bassiana JEF-410 having higher control efficacy than cypermethrin could be effectively used to control D. gallinae in the fungus-friendly humid chicken farms. Challenge of controlling the red mite using B. bassiana in chicken farm, such as formulation and circulation period is possibly improved.
-
Park, So-Yeon,Park, Jong-Min,Ye, Sung-Joon The Korean Association for Radiation Protection 2011 방사선방어학회지 Vol.36 No.4
To quantitatively evaluate how setup errors in conjunction with dose gradients contribute to the error in IMRT dose quality assurance (DQA) measurements. The control group consisted of 5 DQA plans of which all individual field dose differences were less than ${\pm}5%$. On the contrary, the examination group was composed of 16 DQA plans where any individual field dose difference was larger than ${\pm}10%$ even though their total dose differences were less than ${\pm}5%$. The difference in 3D dose gradients between the two groups was estimated in a cube of $6{\times}6{\times}6\;mm^3$ centered at the verification point. Under the assumption that setup errors existed during the DQA measurements of the examination group, a three dimensional offset point inside the cube was sought out, where the individual field dose difference was minimized. The average dose gradients of the control group along the x, y, and z axes were 0.21, 0.20, and 0.15 $cGy{\cdot}mm^{-1}$, respectively, while those of the examination group were 0.64, 0.48, and 0.28 $cGy{\cdot}mm^{-1}$, respectively. All 16 plans of the examination group had their own 3D offset points in the cube. The individual field dose differences recalculated at the offset points were mostly diminished and thus the average values of total and individual field dose differences were reduced from 3.1% to 2.2% and 15.4% to 2.2%, respectively. The offset distribution turned out to be random in the 3D coordinate. This study provided the quantitative data that support the large individual field dose difference mainly stems from possible geometric errors (e.g., random setup errors) under the influence of steep dose gradients of IMRT field.
-
-
Dosimetric comparison of 4 MeV and 6 MeV electron beams for total skin irradiation
Park, So-Yeon,Ahn, Beom Seok,Park, Jong Min,Ye, Sung-Joon,Kim, Il han,Kim, Jung-in BioMed Central 2014 Radiation oncology Vol.9 No.-
<P><B>Background</B></P><P>In this study, dosimetric aspects of TSEI consisting of a 4 MeV beam with no spoiler were investigated in comparison to a nominal 6 MeV beam with spoiler, and the potential for clinical applications was evaluated.</P><P><B>Methods</B></P><P>The TSEI technique is based on the Stanford technique, which utilizes a beam configuration of six-dual fields. MOSFETs were used to measure the optimal gantry angle, profile uniformity, and absolute dose at the calibration point. The depth dose curve of the central axis was measured in the treatment plane using EBT2 film. Photon contamination was measured as the dose at 5 cm depth in a solid water phantom relative to the maximum dose using a parallel plate ion chamber. A MOSFET dosimeter placed on the surface of a humanoid phantom, and EBT2 films inserted into a humanoid phantom were used to verify the TSEI commissioning.</P><P><B>Results</B></P><P>Dosimetric aspects of the 4 MeV TSEI beam, such as profile uniformity (±10%) and relative photon contamination (<0.001%), were comparable to those of a 6 MeV TSEI beam. The relative depth dose of the 4 MeV electrons was 81.4% at the surface and 100% at 0.4 cm. For the 6 MeV electrons, the relative depth dose was 93.4% at the surface and 100% from 0.2 cm to 0.4 cm. The calculated B-factor of the 4 MeV TSEI beam was 1.55, and 1.53 for the 6 MeV TSEI. 80% of the prescribed dose was obtained at 0.22 cm depth for the 4 MeV TSEI beam and 0.53 cm for the 6 MeV TSEI beam in the humanoid phantom measurement.</P><P><B>Conclusions</B></P><P>The suggested 4 MeV beam for TSEI could be applied to shallow depth skin diseases and to electron boost as second treatment course.</P>
-
Ye Gun Park,So Yeon Park,Youn-Je Park 한국식품영양과학회 2021 한국식품영양과학회 학술대회발표집 Vol.2021 No.10
The purpose of this study was to find a suitable oil extraction condition without solvent from Omija(Schisandra chinensis Baillon.) seed at low extraction temperature. Omija seed oil was extracted from Omija juice pormace and fatty acid components were analyzed by gas chromatography with Omija seed oil. The seed oils were extracted at 12 extraction conditions with 3 kinds of moisture contents(5, 7.5 and 10%) and 4 kinds of temperatures(25, 49, 75 and 100℃). Saturated fatty acids were Palmitic acid(2.78∼3.06%) and Stearic acid(0.61∼0.80%), and main unsaturated fatty acids were Linoleic acid(76.15∼76.74%) and Oleic acid(18.32∼19.19%). This result suggest that Omija seed oil could be extracted at low temperature without solvent and used as a valuable functional material.
-
-
Park, So-Yeon,Kim, Il Han,Ye, Sung-Joon,Carlson, Joel,Park, Jong Min American Association of Physicists in Medicine 2014 Medical physics Vol.41 No.11
<P>Purpose: Texture analysis on fluence maps was performed to evaluate the degree of modulation for volumetric modulated arc therapy (VMAT) plans. Methods: A total of six textural features including angular second moment, inverse difference moment, contrast, variance, correlation, and entropy were calculated for fluence maps generated from 20 prostate and 20 head and neck VMAT plans. For each of the textural features, particular displacement distances (d) of 1, 5, and 10 were adopted. To investigate the deliverability of each VMAT plan, gamma passing rates of pretreatment quality assurance, and differences in modulating parameters such as multileaf collimator (MLC) positions, gantry angles, and monitor units at each control point between VMAT plans and dynamic log files registered by the Linac control system during delivery were acquired. Furthermore, differences between the original VMAT plan and the plan reconstructed from the dynamic log files were also investigated. To test the performance of the textural features as indicators for the modulation degree of VMAT plans, Spearman's rank correlation coefficients (r(s)) with the plan deliverability were calculated. For comparison purposes, conventional modulation indices for VMAT including the modulation complexity score for VMAT, leaf travel modulation complexity score, and modulation index supporting station parameter optimized radiation therapy (MISPORT) were calculated, and their correlations were analyzed in the same way. Results: There was no particular textural feature which always showed superior correlations with every type of plan deliverability. Considering the results comprehensively, contrast (d = 1) and variance (d = 1) generally showed considerable correlations with every type of plan deliverability. These textural features always showed higher correlations to the plan deliverability than did the conventional modulation indices, except in the case of modulating parameter differences. The r(s) values of contrast to the global gamma passing rates with criteria of 2%/2 mm, 2%/1 mm, and 1%/2 mm were 0.536, 0.473, and 0.718, respectively. The respective values for variance were 0.551, 0.481, and 0.688. In the case of local gamma passing rates, the r(s) values of contrast were 0.547, 0.578, and 0.620, respectively, and those of variance were 0.519, 0.527, and 0.569. All of the r(s) values in those cases were statistically significant (p < 0.003). In the cases of global and local gamma passing rates, MISPORT showed the highest correlations among the conventional modulation indices. For global passing rates, r(s) values of MISPORT were -0.420, -0.330, and -0.632, respectively, and those for local passing rates were -0.455, -0.490 and -0.502. The values of r(s) of contrast, variance, and MISPORT with the MLC errors were -0.863, -0.828, and 0.795, respectively, all with statistical significances (p < 0.001). The correlations with statistical significances between variance and dose-volumetric differences were observed more frequently than the others. Conclusions: The contrast (d = 1) and variance (d = 1) calculated from fluence maps of VMAT plans showed considerable correlations with the plan deliverability, indicating their potential use as indicators for assessing the degree of modulation of VMAT plans. Both contrast and variance consistently showed better performance than the conventional modulation indices for VMAT. (C) 2014 American Association of Physicists in Medicine.</P>
-
-
-
So-On Park,Ye-Jeon Lim,Sang-Gyoung Lee,Byung-Sik Lee 한국방사성폐기물학회 2022 한국방사성폐기물학회 학술논문요약집 Vol.20 No.1
In this study, the current situation of recycling domestic and foreign metal clearance waste was reviewed to suggest the optimal recycling scenario for metal clearance waste that occurs the most when decommission nuclear power plants. Factors that can directly or indirectly affect the recycling of metal clearance waste were analyzed and evaluation criteria that can be used to evaluate optimal recycling measures were prepared. Using this, a scenario for recycling the optimal metal clearance waste suitable for the domestic environment was proposed. As a result of comparing/reviewing the importance of the first level of the evaluation criteria, public acceptance, national policy, and regulatory requirements were evaluated as the most important ones, and recycling acceptance and regulatory requirements were evaluated as the most important the second level of evaluation criteria. As a result of reviewing the clearance waste recycling scenario, it was evaluated that unrestricted recycling scenario was preferred. This may be because the survey subjects are composed of experts in the nuclear power field, so they know recycling of clearance waste in general industries does not significantly affect radiation safety. However even if it is clearance waste, the public may feel reluctant to recycle just because it was discharged from nuclear power plants, so policy and institutional improvements are needed to reassure the public along with the scientific safety of clearance waste. In addition, in order to improve public acceptance, it seems necessary to prepare specific measures to ensure the participation of public in the entire decommissioning process, share related information, and disclose all routes from generation to disposal of decommissioning waste. Considering that research on domestic clearance waste recycling options has not been activated, this study is significant in that it derives a scenario for recycling metal clearance waste that can be implemented. Also, it is expected that the evaluation criteria derived from this study will be used significantly when establishing a radioactive waste management strategy.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
