Spin Echo, Fidelity, and the Quantum Critical Fan in TmVO_{4}.

Using spin-echo nuclear magnetic resonance in the model transverse field Ising system TmVO_{4}, we show that low frequency quantum fluctuations at the quantum critical point have a very different effect on ^{51}V nuclear spins than classical low-frequency noise or fluctuations that arise at a finite temperature critical point. Spin echoes filter out the low-frequency classical noise but not the quantum fluctuations. This allows us to directly visualize the quantum critical fan and demonstrate the persistence of quantum fluctuations at the critical coupling strength in TmVO_{4} to high temperatures in an experiment that remains transparent to finite temperature classical phase transitions. These results show that while dynamical decoupling schemes can be quite effective in eliminating classical noise in a qubit, a quantum critical environment may lead to rapid entanglement and decoherence.

The impact of a vaccine mandate and the COVID-19 pandemic on influenza vaccination uptake in Western Australian health care students.

Annual influenza vaccination of health care students and workers helps protect themselves and patients from influenza, which has a high disease burden during seasonal peaks in Australia. Health care students are an important cohort whose early attitudes and habits towards influenza vaccination may influence future behaviours. We explored the knowledge, attitudes, and behaviours towards influenza vaccination of health care students in two universities from 2018 to 2020 using convergent mixed methodology. We also assessed the impact of two external events - the introduction of mandatory influenza vaccination for select students in 2019, and the COVID-19 pandemic in 2020. We found a significant increase in self-reported vaccination uptake between 2018 (73.5%) and 2020 (89.6%), with the mandate and COVID-19 pandemic being likely drivers of increased uptake. Vaccine mandates are effective but must be supported by easy accessibility, adequately addressing concerns around effectiveness and safety, and promotion of voluntary acceptance and trust.

[The level of reliability of Lasegue's symptoms measured in the sitting position--results of a multicenter study]. / Stupanj pouzdanosti Lasegue-ovog simptoma mjerenog u sjedecem polozaju--rezultati multicentrickog ispitivanja.

The results of Lasègue test /LT/ examination are not always enough objective owing to subjective complaints superposition. The first favourable clinical experiences with analysis of the LT in sitting position stimulated our previous anatomical, biometrical and clinical investigations (Mandic and col. 1970.). There has been established the stretching of the ischial nerve in classical LT to 12.7 cm, in sitting position to 4.8 cm, and the changing of position from supine to sitting to 6.4 cm. That means that the stretching in sitting LT is greater then in classical way/i.e. 13.26 cm/. The stretching forces in both ways were equal (0-3.7 kp/. The multicentric investigation included 330 patients of both sexes, aged 15-62 years. In 57 patients/17.3%/was LT in sitting position positive and in supine negative. That demonstrate the higher degree of reliability 17.3%. These quantitative results will be continued in qualitative investigation of statistical correlation of relative flexion degrees. The advantages of sitting LT are:more simple, more quick, the taking off patient's clothes is not needed, and the result is more suitable for the objective evaluation of psychogenic complaints superposition or simulation.