Continuous temperature soundings at the stratosphere and lower mesosphere with a ground-based radiometer considering the Zeeman effect

Continuous temperature observations at the stratosphere and lower mesosphere are rare. Radiometry opens the possibility by observing microwave emissions from two oxygen lines to retrieve temperature profiles at all altitudes. In this study, we present observations performed with a temperature radiometer (TEMPERA) at the Meteoswiss station at Payerne for the period from 2014 to 2017. We reanalyzed these observations with a recently developed and improved retrieval algorithm accounting for the Zeeman line splitting in the line center of both oxygen emission lines at 52.5424 and 53.0669 GHz. The new temperature retrievals were validated against MERRA2 reanalysis and the meteorological analysis NAVGEM-HA. The comparison confirmed that the new algorithm yields an increased measurement response up to an altitude of 53–55 km, which extends the altitude coverage by 8–10 km compared to previous retrievals without considering the Zeeman effect. Furthermore, we found correlation coefficients comparing the TEMPERA temperatures with MERRA2 and NAVGEM-HA for monthly mean profiles to be in the range of 0.8–0.96. In addition, mean temperature biases of 1 K and −2 K were found between TEMPERA and both models (MERRA2 and NAVGEM-HA), respectively. We also identified systematic altitude-dependent cold and warm biases compared to both model data sets.

Füth. Ueber einem Fall von Harnblasenverdoppelung. (Centralbl. F. Gynäkol., 1894, No. 14, p. 332). Double bladder case

Features of the case (4-month-old boy): hernia of the white line, splitting of the pubic arch, fusion, in the form of cords, between the rectum and the bladder and between the latter and the abdominal wall, and lengthening of the mesentery flexurae sigmoideae.

Hot-star wind models with magnetically split line blanketing

Fraction of hot stars posses strong magnetic fields that channel their radiatively driven outflows. We study the influence of line splitting in the magnetic field (Zeeman effect) on the wind properties. We use our own global wind code with radiative transfer in the comoving frame to understand the influence of the Zeeman splitting on the line force. We show that the Zeeman splitting has a negligible influence on the line force for magnetic fields that are weaker than about 100 kG. This means that the wind mass-loss rates and terminal velocities are not affected by the magnetic line splitting for magnetic fields as are typically found on the surface of nondegenerate stars. Neither have we found any strong flux variability that would be due to the magnetically split line blanketing.

The Sum Degree Distance and the Product Degree Distance of Generalized Transformation Graphs Gab

In this contribution, we consider line splitting graph LS(G) of a graph G as transformation graph G++ of Gab. We investigate the sum degree distance DD+(G) and product degree distance DD*(G) of transformation graph Gab, which are weighted version of Wiener index. The Transformation graphs of Gab are G++, G+-, G-+ and G--.

Epistemic Disobedience and Decolonial Healing in Norma Elía Cantú’s Canícula

Using the U.S.-Mexican border as the place of enunciation, Cantú’s autoethnobiographical novel insists on the materiality of the border, especially for those living on its southern side, while simultaneously deconstructing it as artificial - a line splitting families and assigning nationalities on an arbitrary basis. Being a collage of photographs from the time the writer was growing up in southern Texas and the cuentos inspired by these visuals, Cantú’s Canícula documents how border crossings and re-crossings become symptomatic of living in a liminal space and how they destabilize the concept of nationality as bi-national families must learn to live with ambiguity. On the one hand, there is the undeniable materiality of the border, with its pain, fear, deportations, and other discriminatory practices; on the other, there is a growing border community of resistance cultivating the memory that they are not immigrants, that they lived in Texas before the Guadalupe-Hidalgo treaty. The paper examines the community’s strategies of survival in the contested cultural and social space and advances the thesis that, giving her community an awareness of its homogeneity and reclaiming its place within the larger socio-political context, Cantú becomes an agent of empowerment and change. She helps decolonize knowledge and being.