Electron impact on K+: mechanisms for extreme ultraviolet submission

A series of R-matrix calculations on K+ is used to derive electron excitation and ionization cross sections. The excitation cross section to the 4s and 3d levels leading to the K+ 60.1, 60.8 and 61.3nm emission lines shows poor agreement with the cross beam experiment of Zapesochny et al (1986, Zh. Eksp. Teor. Fiz. 90 1972 [Sov. Phys. JETP 63 1155]). Cross sections are also presented for exciting the 4p, 5s and 4d levels, the autoionizing 3s open-shell levels, and for ionization. It is shown how pseudoresonances in the calculated cross section can be eliminated by increasing the target basis.</p

Radiative rates and electron impact excitation rates for transitions in He II

We report calculations of energy levels, radiative rates, collision strengths, and effective collision strengths for transitions among the lowest 25 levels of the n <= 5 configurations of He~II. The general-purpose relativistic atomic structure package (GRASP) and Dirac atomic R-matrix code (DARC) are adopted for the calculations. Radiative rates, oscillator strengths, and line strengths are reported for all electric dipole (E1), magnetic dipole (M1), electric quadrupole (E2), and magnetic quadrupole (M2) transitions among the 25 levels. Furthermore, collision strengths and effective collision strengths are listed for all 300 transitions among the above 25 levels over a wide energy (temperature) range up to 9 Ryd (10**5.4 K). Comparisons are made with earlier available results and the accuracy of the data is assessed.Comment: 30 pages of text including 12 figures and 5 Tables will appear in ATOMS 5 (2017

Palliative Gamma Knife Radiosurgery for a Small Part of a Large Vestibular Schwannoma in an Elderly Patient

We report a case of a large vestibular schwannoma in an 80-year-old female patient that shrank after palliative Gamma Knife radiosurgery (GKS). Neurological symptoms included hearing deterioration and facial palsy. The tumor volume was 21.9 mL. Craniotomy was considered high-risk, and conventional GKS was risky, owing to the risk of transient enlargement. Therefore, GKS was performed on only a portion of the tumor. The marginal dose (12 Gy) volume was 3.8 mL (17.4%). The tumor began to shrink after transient enlargement. Sixty months later, the tumor volume was only 3.1 mL, and the patient was able to maintain independent activities of daily living without salvage treatment

Marine zooplankton volumes and ichthyoplankton distribution during summer 2006 in the Peruvian littoral

Los volúmenes de zooplancton variaron de 0,3 a 150 mL/m2, en dos núcleos: a) entre Caleta La Cruz y Chimbote y b) al sur de San Juan. Se determinaron 53 familias de ictioplancton, las más frecuentes fueron Engraulidae (31%), Myctophidae (18%) y Photichthyidae (16%). Huevos y larvas de anchoveta se distribuyeron desde caleta La Cruz hasta Matarani. Huevos en concentraciones importantes frente a bahía de Sechura, Salaverry y Supe y larvas frente a Chicama y Supe. La abundancia fluctuó de 3 a 26.385 huevos/m2 (47,7% de frecuencia), y de 3 a 6.210 larvas/m2 (66,4% de frecuencia). Tamaño de larvas varió de 1,5 a 20 mm (recién nacidas a 37 días de vida). La mayor frecuencia de tallas estuvo entre 2 y 4 mm en las áreas B y D, el área C presentó mayor rango de tallas. Huevos y larvas de Vinciguerria lucetia cercanos a la costa de Caleta La Cruz-Paita, (ingreso de Aguas Subtropicales Superficiales) y al sur del Callao. Especies con baja abundancia: merluza, sardina, perico; caballa y jurel, registradas en el norte y centro a excepción de la sardina que se presentó frente a San Juan

Diurnal changes in chloroplast positioning and photosynthetic traits of C₄ grass finger millet

Mesophyll (M) chloroplasts in finger millet are known to aggregate to the bundle sheath side when leaves are constantly irradiated with extremely high-intensity light. This aggregative movement of M chloroplasts is also observed in natural environment, but whether a natural light regime is effective in inducing the response remains unclear. Abscisic acid is reported to trigger not only the aggregative movement but also stomatal closure, but photosynthetic responses accompanying the aggregative movement also remain unknown.We investigated changes in chloroplast positioning and photosynthetic traits under diurnal patterns of light, mimicking the natural light environment. M chloroplasts showed the aggregative movement with increasing light intensity whether it frequently fluctuated or not, and kept their aggregative positions in the midday. With decreasing light intensity, M chloroplasts returned to the random position in the evening. These results suggest that M chloroplasts often rearrange their intracellular positions during the daytime and that the chloroplast aggregative movement can be induced by a natural regime of light. The chloroplast aggregative movement was observed with increasing stomatal conductance, suggesting that stomatal closure is not crucial to trigger the chloroplast response

Light stress-induced chloroplast movement and midday depression of photosynthesis in sorghum leaves

Plants are exposed to high light intensity, high leaf temperatures and high air-to-leaf water vapor pressure deficit (ALVPD) during the day. These environmental stresses cause stomatal closure and photoinhibitory damage, leading to midday depression of photosynthesis. Chloroplast positioning is essential for the efficient operation of photosynthesis. However, chloroplast behavior before, during, and even after the midday depression of photosynthesis remains unknown. We investigated changes in the intracellular positioning of chloroplasts and photosynthetic traits under a diurnal pattern of light. Sorghum leaves were exposed to a 12-h regime of light mimicking the natural light environment, with constant leaf temperature and ALVPD. Net photosynthetic rate (Pn) showed a diurnal pattern, and midday depression in Pn was observed at 3.8 h of irradiation. Depression in Pn was attributed to stomatal limitation because the decrease in Pn was in accordance with the decrease in stomatal conductance. The maximum efficiency of photosystem II decreased with the increase in light intensity and remained low after 12 h of irradiation. Bundle sheath chloroplasts swelled after 8 h of irradiation, representing the accumulation of starch. Conversely, mesophyll chloroplasts exhibited avoidance response after 4 h of irradiation, and the avoidance position was maintained during the remainder of the daytime. These data suggest that chloroplasts are subject to light stress during and after the midday depression of photosynthesis. The intensity of natural light is excessive for most of the day and this light stress induces chloroplast avoidance response and depression of photosynthesis

Effective collision strengths for allowed transitions among the n

Aims.In this paper we report on calculations of collision strengths and effective collision strengths for allowed transitions among the $n \le$ 5 degenerate levels of Al xii

Thermospheric vertical wind and temperature observed by a Fabry-Perot imager

第3回極域科学シンポジウム　横断セッション「中層大気・熱圏」 11月26日（月） 国立極地研究所 ２階大会議

Afectación psicológica en una mujer adulta víctima de violencia de género

El objetivo de estudio de la investigación que se presenta fue conocer la afectación psicológica-emocional, cognitiva y/o conductual en una mujer adulta víctima de violencia de género, por lo cual se estableció el análisis de evaluación del peritaje psicológico de la examinada con el propósito de identificar los signos y síntomas de los actos de violencia referenciados por la misma. En esa medida se ha tomado en cuenta la evaluación psicológica forense en base a la metodología científica de estudio de caso único que conllevará a detallar a las entidades correspondientes el caso para tomar las medidas pertinentes en base a resolución judicial que se dictamine; resaltando en este caso la relevancia de la Psicología Forense y su rol de asesoramiento en el magistrado a la toma de decisiones. La evaluación psicológica forense en el presente estudio se enfocó en valorar el funcionamiento psicológico-emocional, cognitivo y conductual de la persona evaluada. Finalmente, los resultados del peritaje psicológico arrojaron que la mujer adulta víctima de violencia de género, presenta indicadores de afectación psicológica como consecuencias de los hechos denunciados; este resultado permite al magistrado la toma de decisiones, como otorgar a la víctima las medidas de protección, todo ello sustentado en el aporte de la Psicología Forense como ciencia