Zero-dimensional chemical kinetic simulation of ROS/RNSin pulsed pulsed-discharge exposed water

The concentration variations of reactive oxygen/nitrogen species in water, such as H2O2, NO2 −, and NO3 − generated by pulsed-discharge plasma exposure, are calculated using reaction rates of chemical reactions and acid-base equilibrium in water. The calculated concentrations and pH values are in good agreement with measured data within the range where the significant changes of the measured data are observed. The rate constant for ONOOH generation is estimated to be 7.8 × 103 M−2 s−1, and this value is in good agreement with previously reported values. The generation rates of H2O2, NO2 −, and NO3 − are estimated to be 7.70 × 10−7, 4.10 × 10−7, and 1.10 × 10−7 M s−1, respectively

Expression of longitudinal third-order transport coefficient in terms of α parameters and its validity

The relation between the longitudinal third-order transport coefficient ω 3 contained in the continuity equation for electrons and α parameters defined by arrival-time spectra of an electron swarm is deduced. Values of ω 3 and the α parameters in CH4 gas and SF6 gas are calculated by Monte Carlo simulation, and then the values of ω 3 are compared with those of the longitudinal third-order transport coefficient ω\u273 which are calculated from the α parameters to examine the validity of the deduced relation. The values of ω\u273 are found to excellently agree with those of ω 3 below 500 Td in CH4 gas and from 150 Td to 700 Td in SF6 gas, where the values of the effective ionisation coefficient are nought or quite small. The results suggest that values of ω 3 can be obtained experimentally from arrival-time spectra measured by a double-shutter drift tube

How do Japanese teachers become teacher educators in higher education?

This article examines the challenges new teacher educators who newly entered the univcrstity face in establishing their identities and how to deal with those challenges. The data collected for whole study to analyze the tensions arising for ten teacher educators in their experience as teacher educators and this paper particularly focused on the two of them who showed smaller gap between teacher and teacher educators. This is because they would have a potential to provide the important suggestions for the support toward new teacher educators. We focused on the data from before they became teacher teachers, not only after they became teacher teachers as Lortie (1975) argued the “Apprenticeship of observation”, namely, education for teacher educators has already begun since they were the pre-service teachers. The findings of the study show that, the interviewee faced challenges about their three new roles, teachers of teachers, researchers and curriculum developers to establish their new professional identities. To tackle these challenges, they employed the professional network and communities which they had already participated in. From these findings, we suggested that meeting both of the challenges new teacher educators requires the third space which are placed between university and schools

Primary ALK-1-negative anaplastic large cell lymphoma of the brain: Case report and review of the literature

Anaplastic large cell lymphoma (ALCL) is a type of non-Hodgkin lymphoma composed of CD30-positive cells. Anaplastic lymphoma kinase (ALK) -1 positive ALCL frequently involves both lymph nodes and extranodal sites. While primary extranodal involvement of ALK-1 negative ALCL is rare, this case is unique in that it is a case of primary ALK-1 negative ALCL of the brain. A 79-year-old man presented with dementia-like symptoms. Neuroimaging revealed a well-enhanced mass in the left parieto-occipital region. The tumor was excised and histological diagnosis of primary ALK-1-negative ALCL was made. Primary ALK-1-negative ALCL in this case showed aggressive clinical behavior and fatal outcome. It is of great importance to avoid any delay in reaching an accurate diagnosis, as even primary ALCL of the brain is too seldom suspected clinically.ArticleNEUROPATHOLOGY. 29(2):166-171 (2009)journal articl

Dissociative reactions induced by electron impact and electron transport in TEOS vapor

Reactions for dissociative ionization and neutral dissociation collisions between an electron and a tetraethoxysilane [Si(OC2H5)4, TEOS] molecule are reported, and neutral dissociation cross sections are calculated by applying the classical Rice–Ramsperger–Kassel theory. Detailed electron collision cross section set of TEOS vapor, including 18 neutral dissociation cross sections and 20 ionization cross sections, is constructed. Electron transport coefficients, such as the mean-arrival-time drift velocity, bulk drift velocity, longitudinal bulk diffusion coefficient, and ionization coefficient, and rate coefficients for both elastic and inelastic collisions in TEOS vapor are calculated from the present cross section set using a Monte Carlo method. The validity of the present cross section set is demonstrated by comparing the calculated electron transport coefficients with measured data. Furthermore, fragmentation of TEOS molecules by electron impact is simulated, and then the number of fragments produced in the simulation is compared with the measured mass spectra