δ13C tracing of dissolved inorganic carbon sources in major world rivers

δ13C tracing of dissolved inorganic carbon sources in major world river

Sensor Based on Extending the Concept of Fidelity to Classical Waves

We propose and demonstrate a remote sensor scheme by applying the quantum mechanical concept of fidelity loss to classical waves. The sensor makes explicit use of time-reversal invariance and spatial reciprocity in a wave chaotic system to sensitively and remotely measure the presence of small perturbations. The loss of fidelity is measured through a classical wave-analog of the Loschmidt echo by employing a single-channel time-reversal mirror to rebroadcast a probe signal into the perturbed system. We also introduce the use of exponential amplification of the probe signal to partially overcome the effects of propagation losses and to vary the sensitivity.Comment: 4 pages, 2 figure

Aberdeen University Ontology Reuse Stack

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Pharmacies as potential providers of harm reduction services: A preliminary online survey

Background Recreational drug use is a major cause of disease, injury, physical and mental impairment and death in developed countries such as the United Kingdom and the United States. Alcohol, tobacco, cannabis, 3,4-methylenedioxymethamphetamine (MDMA) and psilocybe mushrooms are recreational drugs with capacity to cause harm. Cannabis, MDMA and psilocybin have reported therapeutic applications. Objectives The primary purpose of this study was to determine which of the three types of vendor (pharmacy, shop and the black market) are perceived to be the most suitable for selling the substances discussed according to a general population sample. Methods A sample of 105 UK nationals was selected for the survey. Participants were presented information regarding reported relative dangers of alcohol, tobacco, cannabis, MDMA and psilocybin and potential therapeutic applications. Participants were then asked to review harm reduction strategies. Results It was found that participants concluded that pharmacists with available NHS support from GPs and mental health workers are the most suitable vendors of cannabis, MDMA and psilocybin as opposed to regulated shops or the black market (p &lt; 0.001). There was a high level of support for selling cannabis in pharmacies both for therapeutic use and for harm reduction purposes with a mean score of 7.0 out of 10. Participants (60) with a university education were found to be more in favour of the substances being sold primarily in pharmacies (alcohol 5.6, tobacco 6.7, cannabis 7.6, MDMA 6.5 and psilocybin 6.5) than participants (45) with no university qualification (alcohol 5.0, tobacco 4.8, cannabis 6.3, MDMA 5.0 and psilocybin 5.1). Conclusions The data suggest that the university-educated participants are supportive of treating recreational drug use as a health issue with GPs, mental health workers and pharmacists taking on roles. </jats:sec

A Comparison of Seven Teaching Traits between Experienced Special Education Teachers and Experienced Regular Education Teachers

There seems a need for educational research to find if special education teachers have unique behavioral traits in dealing with children in the classroom. Many studies have been conducted with this general goal in mind. Unfortunately, most of the studies have dealt with such things as personality traits, attitudes, and characteristics. The purpose of this study was to determine if there are any significant differences among experienced special education teachers and experienced regular classroom teachers on seven teaching traits. It was hoped that this investigation would point out some behaviors unique to special education teachers since it is believed by many educators that it takes someone with unique traits to be a special education teacher