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Parameter Estimation and Confidence Limits for the WeibulI Distribution
허준행,Heo, Jun Haeng Korean Society of Civil Engeneers 1993 대한토목학회논문집 Vol.13 No.4
본 연구에서는 Weibull 확률분포함수의 매개변수 추정방법을 적용하였으며, 재현기간별 신뢰한계를 구하기 위한 점근분산식(漸近分散式)을 유도하였다. 각 과정은 기존의 모멘트법, 최우도법, 확률가중 모멘트법(Probability weighted moments)개념에 기초하여 유도하였으며, 유도된 식들을 실제 홍수자료에 적용하였다. For the three parameter Weibull distribution, the parameter estimation techniques are applied and the asymptotic variances of the quantile to obtain the confidence limits for a given return period are derived. Three estimation techniques are used for these purposes: the methods of moments, maximum likelihood and probability weighted moments. The three parameter Weibull distribution as a flood frequency model is applied to actual flood data.
허준행,이상희,김아영,고영호 생화학분자생물학회 2018 Experimental and molecular medicine Vol.50 No.-
Nervous wreck (Nwk), a protein that is present at Type 1 glutamatergic synapses that contains an SH3 domain and an FCH motif, is a Drosophila homolog of the human srGAP3/MEGAP protein, which is associated with mental retardation. Confocal microscopy revealed that circles in Nwk reticulum enclosed T-shaped active zones (T-AZs) and partially colocalized with synaptic vesicle (SV) markers and both exocytosis and endocytosis components. Results from an electron microscopic (EM) analysis showed that Nwk proteins localized at synaptic edges and in SV pools. Both the synaptic areas and the number of SVs in the readily releasable (RRPs) and reserve (RPs) SV pools in nwk2 were significantly reduced. Synergistic, morphological phenotypes observed from eag1;;nwk2 neuromuscular junctions suggested that Nwk may regulate synaptic plasticity differently from activitydependent Hebbian plasticity. Although the synaptic areas in eag1;;nwk2 boutons were not significantly different from those of nwk2, the number of SVs in the RRPs was similar to those of Canton-S. In addition, three-dimensional, high-voltage EM tomographic analysis demonstrated that significantly fewer enlarged SVs were present in nwk2 RRPs. Furthermore, Nwk formed protein complexes with Drosophila Synapsin and Synaptotagmin 1 (DSypt1). Taken together, these findings suggest that Nwk is able to maintain synaptic architecture and both SV size and distribution at T-AZs by interacting with Synapsin and DSypt1.
허준행,신소연,이창목,김영효 한국동물분류학회 2020 Animal Systematics, Evolution and Diversity Vol.36 No.2
A newly recorded species Caprella mutica Schurin, 1935 belonging to the family Caprellidae Leach, 1814 was collected from the East Sea, Korea. Caprella mutica is native to the north-east Asia but is a well-known cosmopolitan and invasive species in many areas. This species is morphologically highly similar to C. acanthogaster Mayer, 1890. However, it is distinguished from a combination of the characteristics of the head, pereonites 1-2, and gnathopod 2. In this study, the Korean C. mutica is fully illustrated based on the mature specimens and compared to C. acanthogaster.