Radio-Optical Galaxy Shape Correlations in the COSMOS Field

We investigate the correlations in galaxy shapes between optical and radio wavelengths using archival observations of the COSMOS field. Cross-correlation studies between different wavebands will become increasingly important for precision cosmology as future large surveys may be dominated by systematic rather than statistical errors. In the case of weak lensing, galaxy shapes must be measured to extraordinary accuracy (shear systematics of $< 0.01\%$) in order to achieve good constraints on dark energy parameters. By using shape information from overlapping surveys in optical and radio bands, robustness to systematics may be significantly improved without loss of constraining power. Here we use HST-ACS optical data, VLA radio data, and extensive simulations to investigate both our ability to make precision measurements of source shapes from realistic radio data, and to constrain the intrinsic astrophysical scatter between the shapes of galaxies as measured in the optical and radio wavebands. By producing a new image from the VLA-COSMOS L-band radio visibility data that is well suited to galaxy shape measurements, we are able to extract precise measurements of galaxy position angles. Comparing to corresponding measurements from the HST optical image, we set a lower limit on the intrinsic astrophysical scatter in position angles, between the optical and radio bands, of $\sigma_\alpha > 0.212\pi$ radians (or $38.2^{\circ}$) at a $95\%$ confidence level.Comment: 17 pages, 13 figure, 5 tables. Updated to match published version with a number of typographical correction

Northern Lambda Nord Communique, Vol.5, No.4 (April 15, 1984)

https://digitalcommons.usm.maine.edu/nln_communique/1112/thumbnail.jp

Working beyond the border? : a new research agenda for the Evaluation of Labour Standards in EU trade agreements

The European Union (EU) has approximately fifty bilateral trade agreements in place with partners across the world, and more than twenty more that are at various stages of the negotiating process. At the same time as they increase in number, these agreements also increase in scope. EU trade agreements now cover a wide range of regulatory measures, including ‘Trade and Sustainable Development’ chapters, which, among other things, contain obligations in relation to labour standards. These labour standards provisions follow a common model (with limited variations) and adopt an approach which has been described as ‘promotional’ rather than ‘conditional’. In the context of the broader debate about the purpose and efficacy of the labour and trade linkage, this article examines the possibilities and limitations of the EU's new provisions on labour standards. It draws attention to the limited research on the impact of existing provisions ‘on the ground’ with respect to different types of agreements, and why this is problematic. It then concludes with proposals for a research agenda that can fill this gap, involving a set of methodologies requiring greater concern for firm and country-level assessment of changes arising from the implementation of this new breed of EU bilateralism and directed to the question of whether EU labour standards can really work ‘beyond the border’

Cadherins trade bonds

Study describes how adhesion molecules rearrange their interactions to exit cell junctions

Inside the hos(t)pital

Publisher PD

Identifying prognostic structural features in tissue sections of colon cancer patients using point pattern analysis

Diagnosis and prognosis of cancer is informed by the architecture inherent in cancer patient tissue sections. This architecture is typically identified by pathologists, yet advances in computational image analysis facilitate quantitative assessment of this structure. In this article we develop a spatial point process approach in order to describe patterns in cell distribution within tissue samples taken from colorectal cancer (CRC) patients. In particular, our approach is centered on the Palm intensity function. This leads to taking an approximate-likelihood technique in fitting point processes models. We consider two Neyman-Scott point processes and a void process, fitting these point process models to the CRC patient data. We find that the parameter estimates of these models may be used to quantify the spatial arrangement of cells. Importantly, we observe characteristic differences in the spatial arrangement of cells between patients who died from CRC and those alive at follow-up

P2_6 Surfin' Fury

In a short film called Kung Fury, the main hero uses a person as a surfing board. We investigated the force he would need to push himself forward based on the kinetic friction and drag force. The force ranges between -335.24 ± 6.87 N and -980.74 ± 6.87 N