Tandem oxy-Cope and transannular vinylogous aldol reactions and/or vinylogous retro-aldol, conjugate addition, and transannular vinylogous aldol reactions transformed some tricyclic vinyl enones into fused tetracycles under basic conditions. Mesylates derived from similar tetracyclic products underwent efficient skeletal reorganization via transannular ring-opening but then different modes of t...

A qualitative research wave has swept through the social sciences during the last decades. Interviews, textual analyses and natural observations have come into widespread use as modes of inquiry. The qualitative research movement is interdisciplinary, and an opening of the social sciences to the humanities has taken place, drawing on hermeneutics, as well as narrative, discursive, conversationa...

After 3 years of absence due to COVID-19 pandemic, the first group Chinese tourists from Xiamen arrived Bangkok, Thailand, on Monday 9th January 2023 just a day after China abandoned zero-COVID policies and reopened its border Sunday 8th January. During 9th-12th February, Royal College Radiologists Thailand (RCRT) Radiological Society (RST) hosted 21th Asian Oceanian Congress Radiology (AOCR), ...

background and aims. the aim of this study was to assess the opening torque of grooved and non-grooved screws made of shape memory alloys (sma) for fixation of mandibular fractures. materials and methods. in this in vitro study the opening torques of ten sma screws with grooves and ten sma screws without grooves were compared in 20 holes (10 holes for grooved screws and 10 holes for non-grooved...

background: considering that complications and outcome of each method of pediatric inguinal hernia repair are one of the determinants for pediatric surgeons for selection of the appropriate surgical technique, we compared the early and late complications of two inguinal repair techniques, with and without opening the external oblique muscle fascia. materials and methods: in this double-blind cl...

To obtain a more human-like interaction with technical systems, those have to be adaptable to the users individual preferences, and current emotional state. In human-human interaction the behaviour of the speaker is characterised by semantic and prosodic cues, given (among other indicators) as short feedback signals. These so called filled pauses minimally convey certain dialogue functions such...

We present an experimental study of low temperature electronic transport in the hybridization gap of inverted InAs/GaSb composite quantum wells. An electrostatic gate is used to push the Fermi level into the gap regime, where the conductance as a function of sample length and width is measured. Our analysis shows strong evidence for the existence of helical edge modes proposed by Liu et al [Phy...

The changes of molecular conformation, contact geometry, and metal-molecule bonding are revealed by inelastic-electron-tunneling spectroscopy measurements characterizing the molecular vibrational modes and the metal-phonon modes in alkanedithiol molecular junctions at low temperature. Combining inelastic-electron-tunneling spectroscopy with mechanical control and electrode material variation (A...

Gapped 2D Dirac materials, in which inversion symmetry is broken by a gap-opening perturbation, feature a unique valley transport regime. Topological valley currents in such materials are dominated by bulk currents produced by electronic states just beneath the gap rather than by edge modes. The system ground state hosts dissipationless persistent valley currents existing even when topologicall...