Hamilton (1989) introduced the Markov-switching models (from now on MS) to the business cycle researchers. He applied the MS model to the real U.S. GDP and showed how good the probability of being in recession or expansion generated by his model matched the NBER dating. Since then, the studies on business cycles that exploited the MS model have grown exponentially. Nevertheless, the basic MS mo...

The development of flexible electronics operating at radio-frequencies (RF) requires materials that combine excellent electronic performance and the ability to withstand high levels of strain. In this work, we fabricate graphene field-effect transistors (GFETs) on flexible substrates from graphene grown by chemical vapor deposition (CVD). Our devices demonstrate unity-current-gain frequencies, ...

Among radio amateurs digital meteor burst communication has been discussed for many years. Despite this, no experiments on amateur basis have (to the knowledge of the author) been performed in Sweden or elsewhere in the world. During the past two years several amateurs have reported the random appearance of AX.25 packets from very distant stations. The propagation of these packets can only be e...

Inter-session excess variance of U/Pb and Pb/Pb ratios in LA-ICP-MS zircon dating is the largest contributor to systematic errors, which turn limit accuracy age determinations. Quantifying long-term reference materials allows for estimation samples, but such compilations are not available literature. Here, we present results over 100 measurement sessions six years seven common calculate a chara...

Abstract. The ability to constrain the age of calcite formation is great utility Earth science community, due ubiquity across a wide spectrum geological systems. Here, we present first in situ laser ablation inductively coupled tandem quadrupole mass spectrometry (LA-ICP-MS/MS) Lu–Hf ages for calcite, demonstrating geologically meaningful iron oxide copper gold (IOCG) and skarn mineralisation, ...

How to tell time: • Relative Time: putting events in time order. • Law of Superposition • Correlation of rock layers using fossils. William Smith " There is a wonderful order and regularity with which nature has disposed of fossils and assigned to each its peculiar stratum. " How to tell time: • Absolute Time: Determining age in years.

We observed an anomaly in the human electroencephalogram (EEG) associated with exposure to terrestrial trunked radio (TETRA) Radiofrequency Fields (RF). Here, we characterize the time and frequency components of the anomaly and demonstrate that it is an artefact caused by TETRA RF interfering with the EEG recording equipment and not by any direct or indirect effect on the brain.

Studies on the evolutionary history of ascomycetes in terms of time scale will help to understand historical patterns that shape their biodiversity. Until now most of dating studies of ascomycetes have focused on major events in fungal evolution but not on divergence events within smaller groups of fungi e.g. within Sordariomycetes. We used molecular dating to estimate the time of separation of...

We present Rb and Sr mass fraction 87Sr/86Sr isotope ratio measurement results for four reference materials (RMs) obtained from the Service d'Analyse des Roches et Minéraux (SARM), Nancy, France: Mica-Mg, Mica-Fe, GL-O FK-N. These RMs have different chemical compositions spanning range of those most K-bearing feldspars micas, making them potential calibration in situ Rb-Sr dating natural minera...

Abstract. The North Pamir, part of the western syntax India–Asia collision zone, preserves remnants a poorly understood Paleozoic intra-oceanic subduction zone. To constrain age this ancient ocean floor, we analyzed calcite phases in vesicular basalt and basaltic volcanic breccia with U–Pb geochronology using laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS). Dating radial...