Hydraulic Characteristics of Perforated Hose for Spray Irrigation and Mathematical Model for Calculating Spray Distribution

散水灌漑用多孔ホースの水理特性を調べるために実験を行った. このホースはポリエチレン製であるが,流水中のゴミによる目詰り対策用の特殊フィルタが取り付けられている. まず,ホース細孔の流量係数をc,その細孔の断面積をaとして,係数caを圧力の一次式で表した. また,横断方向の散水分布をガンマ分布で近似した. その形状母数は一定値としたが,尺度母数は圧力の関数として表した. 次に,ホース内の流れを水理学的に定式化し,HAZEN-WILLIAMS平均流速公式の係数CHの値をシミュレーション的に調べてCH=60を得た. また流量･水圧および2次元的散水分布を計算できる水理モデルを提示するとともに,これが実際の現象をよく再現できることを示した

Lateralization, maturation, and anteroposterior topography in the lateral habenula revealed by ZIF268/EGR1 immunoreactivity and labeling history of neuronal activity

We report habenular lateralization in a simple transgenic mouse model used for labeling a facet of neuronal activity history. A transgenic construct comprised of a zif268/egr1 immediate-early gene promoter and a gene for normal Venus fluorescent protein with a membrane tag converted promoter activity into long-life fluorescent proteins, which was thought to describe a facet of neuronal activity history by summing neuronal activity. In addition to mapping the immediate-early gene-immunopositive cells, this method helped demonstrate the functionality of the lateral habenular nucleus (LHb). During postnatal development, the LHb was activated between postnatal days 10 and 16. The water-immersion restraint stress also activated the LHb over a similar period. LHb activation was functionally lateralized, but had no directional bias at the population level. Moreover, the posterior LHb was activated in the early stage after the stress, while the anterior LHb was activated in the later stage. Our results indicate lateralization, maturation, and anteroposterior topography of the LHb during postnatal development and the stress response

Multimodal Image and Spectral Feature Learning for Efficient Analysis of Water-Suspended Particles

apan Science and Technology Agency SICORP and Natural Environment Research Council (JST-NERC SICORP Marine Sensor Proof of Concept Grant JPMJSC1705, NE/R01227X/1); JSPS KAKENHI Grant (18K13934 and 18H03810); Sumitomo Foundation: Grant for environmental Research Project (203122). Acknowledgments. The authors thank Dr. T. Fukuba for the support for building the experimental setup. The authors also thank Dr. H. Sawada for providing samples for this work.Peer reviewedPublisher PD