The spatial resolution and signal-to-noise ratio (SNR) attainable in magnetic resonance microscopy (MRM) are limited by intrinsic probe losses and probe-sample interactions. In this work, the... Show moreThe spatial resolution and signal-to-noise ratio (SNR) attainable in magnetic resonance microscopy (MRM) are limited by intrinsic probe losses and probe-sample interactions. In this work, the possibility to exceed the SNR of a standard solenoid coil by more than a factor-of-two is demonstrated theoretically and experimentally. This improvement is achieved by exciting the first transverse electric mode of a low-loss ceramic resonator instead of using the quasi-static field of the metal-wire solenoid coil. Based on theoretical considerations, a new probe for microscopy at 17 T is developed as a dielectric ring resonator made of ferroelectric/dielectric low-loss composite ceramics precisely tunable via temperature control. Besides the twofold increase in SNR, compared with the solenoid probe, the proposed ceramic probe does not cause static-field inhomogeneity and related image distortion. Show less
Nieuwenhuyse, O.P.; Daskiewicz, M.; Schneider, G. 2018
This paper presents a review of the ceramic investigations at the Late Neolithic site of Shir. Situated in Western Syria the site occupies a central position in the so-called ‘Levantine corridor’,... Show moreThis paper presents a review of the ceramic investigations at the Late Neolithic site of Shir. Situated in Western Syria the site occupies a central position in the so-called ‘Levantine corridor’, which linked the southern Levant, Central Anatolia, and Upper Mesopotamia in the Neolithic. The ceramic sequence covers a period of several centuries between c. 7000 and 6450 cal BC. The pottery analysis combined bulk processing in the field and archaeometric work in the laboratory to construct a viable ceramic categorization. This paper discusses long-term ceramic trends that follow the first appearance of pottery in the northern Levant, including the development of pottery containers for storage. Show less
