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원예용 상토 재료 피트모스, 펄라이트, 버미큘라이트의 혼합비율에 따른 물리적 특성 변화
김혁수,김계훈 한국토양비료학회 2011 한국토양비료학회지 Vol.44 No.3
The physical properties of horticultural substrate are important for optimal plant growth. The physical properties should be properly maintained during the crop growing season for producing higher yield. This experiment was carried out to evaluate the physical properties of different mixtures from various raw materials as horticultural substrates. The mixtures at the different ratios of peatmoss, perlite and vermiculite subjected to 10:0:0, 8:2:0, 6:4:0, 4:6:0, 2:8:0, 0:8:2, 0:10:0, 0:6:4, 0:4:6, 0:2:8, 8:0:2, 0:0:10, 6:0:4, 4:0:6, 2:0:8, 2:6:2,2:4:4, 4:2:4, 4:4:2, 6:2:2 and 2:2:6 were prepared and analyzed according to two methods of the European Standardization (EN) and Rural Development Administration (RDA). The optimum range of physical properties of a specific horticultural substrate can be predicted using physical-property-triangle. This triangle can also be used to convert a physical property from the EN method to that from the RDA method. Results showed that the mixture at a ratio of > 60% peatmoss, in most cases, is in the range of optimum physical condition for plant growth. We conclude that the developed physical-property-triangle can be suitable to suggest the optimum ratios of horticultural substrates used in this study.
Reducing Optimistic Bias : From the Perspective of Construal Level Theory
김혁수 한국헬스커뮤니케이션학회 2022 헬스커뮤니케이션연구 Vol.21 No.1
The current study proposes that construal level can influence one’s positive evaluation of his or her susceptibility to diseases compared with others. A series of experiments was conducted to demonstrate the link between them. In study 1, the effect of psychological distances (temporal and spatial distance) on optimistic bias was found, such that the proximal distance reduced the optimistic bias. In study 2, manipulating the construal level, we founded that the construal level influenced the optimistic bias. Subjects primed to have low construal level reported the reduced optimistic bias compared with those primed to have high construal level. Study 3 was conducted with a 2 (construal level: high vs. low) × 2 (perceived severity: high vs. low) between-subjects factorial design. The moderated mediation analysis discovered that perceived control mediated the two-way interaction effect between construal level and perceived severity on the optimistic bias. Studies 1 and 2 collected data using college students as the sample, and study 3 employed the general adult population to improvethe generalizability of the findings. Theoretical and managerial implications were discussed for researchers and practitioners.
뇌실질, 안후부, 비강 및 부비동을 침범한 악성 소타액선 종양- 증 례 보 고 -
김혁수,이상구,송관영,강동수 대한신경외과학회 2003 Journal of Korean neurosurgical society Vol.33 No.2
We report a case of huge minor salivary gland carcinoma extending to intracranial, retroorbital and sinonasal cavities. The patient was a 51-year-old man who had progressive nasal obstruction, decreased visual acuity and headache. Brain computed tomography and magnetic resonance image revealed a huge heterogeneous enhancing mass with extensive bony destruction originating from right maxillary sinus and both nasal cavities to the frontal base structures. The tumor mass was approached by a craniofacial route and subtotal removal was done because of its marked invasion of cavernous sinus, parasellar structures and hypothalamus. The histological diagnosis was minor salivary gland adenocarcinoma. Key words:Minor salivary gland carcinoma;Craniofacial approach.