Sökresultat

Filtyp

Din sökning på "*" gav 533093 sökträffar

Assessment of Free Gas in the Tibial Condyle Bone of the Human Knee by Diode Laser Spectroscopy with Possible Application to Arthrosis Diagnostics

The gas in scattering media absorption spectroscopy (GASMAS) technique was used to investigate the possible presence of free gas pores in human condyle bones, extracted from the tibia in knee revision surgical procedures in response to arthrosis development. Following earlier studies showing free gas presence in femoral head bones, decaying because of inadequate blood flow, we investigated condyle

Impact of Preoperative Symptoms and Revascularized Arterial Segment in Patients With Chronic Limb-Threatening Ischemia

Background: Little is known about the relative impact of the preoperative symptoms rest pain and tissue loss, and of the arterial segment revascularized, on amputation rate and mortality in patients with chronic limb-threatening ischemia (CLTI). We wanted to investigate this topic further. Method: This population-based observational cohort study involved 10 419 patients revascularized for CLTI in

Time-resolved photoemission spectroscopy of electronic cooling and localization in CH3 NH3 PbI3 crystals

We measure the surface of CH3NH3PbI3 single crystals by making use of two-photon photoemission spectroscopy. Our method monitors the electronic distribution of photoexcited electrons, explicitly discriminating the initial thermalization from slower dynamical processes. The reported results disclose the fast-dissipation channels of hot carriers (0.25 ps), set an upper bound to the surface-induced r

Screening from eg states and antiferromagnetic correlations in d(1,2,3) perovskites : A GW+EDMFT investigation

We perform a systematic ab initio study of the electronic structure of Sr(V,Mo,Mn)O3 perovskites, using the parameter-free GW+EDMFT method. This approach self-consistently calculates effective interaction parameters, taking into account screening effects due to nonlocal charge fluctuations. Comparing the results of a three-band (t2g) description to those of a five-band (t2g+eg) model, it is shown

Status of the ESS elliptical cryomodules at CEA saclay

The first ESS prototype cryomodule with medium beta cavities named M-ECCTD is being assembled at CEA Saclay. The Q curves of the 4 cavities mounted inside the cryomodule are presented, and the four power couplers have been conditioned at high power before their assembly onto the cavity string. Completion of the M-ECCTD assembly outside clean room is in progress as well as the finalization of the R

Genetic associations at 53 loci highlight cell types and biological pathways relevant for kidney function

Reduced glomerular filtration rate defines chronic kidney disease and is associated with cardiovascular and all-cause mortality. We conducted a meta-analysis of genome-wide association studies for estimated glomerular filtration rate (eGFR), combining data across 133,413 individuals with replication in up to 42,166 individuals. We identify 24 new and confirm 29 previously identified loci. Of these

GigaFRoST : The gigabit fast readout system for tomography

Owing to recent developments in CMOS technology, it is now possible to exploit tomographic microscopy at third-generation synchrotron facilities with unprecedented speeds. Despite this rapid technical progress, one crucial limitation for the investigation of realistic dynamic systems has remained: A generally short total acquisition time at high frame rates due to the limited internal memory of av

Revealing phase boundaries by weighted parametric structural refinement

Parametric Rietveld refinement from powder diffraction data has been utilized in a variety of situations to understand structural phase transitions of materials in situ. However, when analysing data from lower-resolution two-dimensional detectors or from samples with overlapping Bragg peaks, such transitions become difficult to observe. In this study, a weighted parametric method is demonstrated w

A 19.5 GHz 28 nm CMOS Class-C VCO with Reduced 1/f Noise Upconversion

Class-C operation is leveraged to implement a K-band CMOS VCO where the upconversion of the 1/f noise from the core transistors is robustly contained at a minimal level. Implemented in a bulk 28 nm CMOS technology,the VCO shows a phase noise as low as -108.5 dBc/Hz at 1 MHz offset (-83 dBc/Hz at 100 kHz offset) from the 19.5 GHz carrier,while consuming 14.4 mW and featuring a 12% tuning range.

Förändrade resvanor och mobilitetstjänster - En kunskapsöversikt

Denna rapport tittar närmare på de förändringarna i resvanor som skett de senaste årtiondena, inklusive en kort historisk utblick, vilka har identifierats i transportlitteraturen. Rapporten undersöker även möjligheten till innovation kopplat till transportslag och till mobilitetstjänster med syfte att svara upp till befintliga och framtida resebehov.Specifikt presenteras några möjliga svar till fr

Time- And energy-resolved effects in the boron-10 based multi-grid and helium-3 based thermal neutron detectors

The boron-10 based multi-grid detector is being developed as an alternative to helium-3 based neutron detectors. At the European Spallation Source, the detector will be used for time-of-flight neutron spectroscopy at cold to thermal neutron energies. The objective of this work is to investigate fine time- and energy-resolved effects of the Multi-Grid detector, down to a few µeV, while comparing it

Citizen participation in the governance of nature‐based solutions

The last half-a-century has seen a marked demand for authentic citizen participation in public policy-and decision-making, not least in the field of sustainability. The depth and forms of citizen engagement in nature-based solutions (NBS), for example, and how such participation shapes their trajectories is gaining increasing attention. In this paper, we analyze current forms and implications of c

The validity of registered synchronous peritoneal metastases from colorectal cancer in the Danish medical registries

Introduction: Treatment options for peritoneal metastases (PM) from colorectal cancer (CRC) have increased, their efficiency should be monitored. For this purpose, register-based data on PM can be used, if valid. Purpose: We aimed to evaluate the completeness and positive predictive value (PPV) of synchronous peritoneal metastases (S-PM) registered among CRC patients in the Danish National Patient

Event-shape engineering for inclusive spectra and elliptic flow in Pb-Pb collisions at s NN =2.76 TeV

We report on results obtained with the event-shape engineering technique applied to Pb-Pb collisions at sNN=2.76 TeV. By selecting events in the same centrality interval, but with very different average flow, different initial-state conditions can be studied. We find the effect of the event-shape selection on the elliptic flow coefficient v2 to be almost independent of transverse momentum pT, whic

Modeling the morphology of self-assisted GaP nanowires grown by molecular beam epitaxy

The morphologies of self-assisted GaP nanowires grown by gas source MBE in regular arrays on silicon substrates are modeled by a kinetic equation for the nanowire radius versus the position along the nanowire axis. The most important growth parameter that governs the nanowire morphology is the V/III flux ratio. Sharpened nanowires with a stable radius equal to only 12 nm at a V/III flux ratio of 6