Total internal reflection (TIR) Raman tribometer: a new tool for in situ study of friction-induced material transfer

The sliding history in friction-induced material transfer of dry 2H-MoS2 particles in a sheared contact was studied. Video images in contact showed fragmentation of lubricant particles and build-up of a transfer film, and were used to measure the speed of fragmented particles in the contact region. Total internal reflection (TIR) Raman spectroscopy was used to follow the build-up of the MoS2 transfer film. A combination of in situ and ex situ analysis of the mating bodies revealed the thickness of the transfer film at steady state to be of the order of 35 nm on the ball surface and 15 nm on the flat substrate. Insights into the mechanism of formation of the transfer film in the early stages of sliding contact are deduced.

SOI optical switch matrix integrated with spot size converter (SSC) and total internal reflection (TIR) mirrors

SOI (Silicon on Insulator) based photonic devices has attracted more and more attention in the recent years. Integration of SOI optical switch matrix with isolating grooves, total internal reflection (TIR) mirrors and spot size converter (SSC) was studied. A folding re-arrangeable non-blocking 4x4 optical switch matrix and a blocking 16x16 matrix with TIR mirrors and SSC were fabricated on SOI wafer. The performaces, including extinction ratio and the crosstalk, are better than before. The insertion loss and the polarization dependent loss (PDL) at 1.55 mu m increase slightly with longer device length, more bend and intersecting waveguides. The insertion losses decrease 2 similar to 3 dB when anti-reflection films are added in the ends of the devices. The rise and fall times of the devices are 2.1 mu s and 2.3 mu s, respectively.

Waldo Williams:? 'Holi'n Hir yn y Tir Tywyll'

Bryant-Quinn, M. (2006). Waldo Williams: 'Holi'n Hir yn y Tir Tywyll'. In D. Walford Davies and J. Walford Davies(Eds.), Cof ac Arwydd: Ysgrifau Newydd ar Waldo Williams (pp.143-162). Abertawe: Cyhoeddiadau Barddas.

Orphan receptor IL-17RD regulates Toll-like receptor signalling via SEFIR/TIR interactions

Receptor families of the innate immune response engage in 'cross-talk' to tailor optimal immune responses against invading pathogens. However, these responses are subject to multiple levels of regulation to keep in check aberrant inflammatory signals. Here, we describe a role for the orphan receptor interleukin-17 receptor D (IL-17RD) in negatively regulating Toll-like receptor (TLR)-induced responses. Deficiency of IL-17RD expression in cells leads to enhanced pro-inflammatory signalling and gene expression in response to TLR stimulation, and Il17rd(-/-) mice are more susceptible to TLR-induced septic shock. We demonstrate that the intracellular Sef/IL-17R (SEFIR) domain of IL-17RD targets TIR adaptor proteins to inhibit TLR downstream signalling thus revealing a paradigm involving cross-regulation of members of the IL-17R and TLR families.

Les orphelines de Valneige : drame en 3 actes, tiré de "Geneviève" de M. de Lamartine / par MM. Decourcelle et Jaime fils ; [musique nouvelle de M. Montaubry]

Collection : Théâtre contemporain illustré ; 128e livraison

Les orphelines de Valneige : drame en 3 actes, tiré de "Geneviève" de M. de Lamartine / par MM. Decourcelle et Jaime fils ; [musique nouvelle de M. Montaubry]

Collection : Théâtre contemporain illustré ; 128e livraison

Les orphelines de Valneige : drame en 3 actes, tiré de "Geneviève" de M. de Lamartine / par MM. Decourcelle et Jaime fils ; [musique nouvelle de M. Montaubry]

Collection : Théâtre contemporain illustré ; 128e livraison

Bagnolet, 15/8/20, tir à l'arc : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 60541

Anvers, Anglais vainqueurs [du tir à la corde, Jeux olympiques, 17-18 août 1920] : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 60591