One of the more challenging aspects of hybrid permanent magnet undulator design is end-field termination. Klaus Halbach provided indication of correct excitation patterns for tapered wigglers, but implementation on hybrid undulators has proven more difficult. Initial results on APS undulators achieved complete passive gap dependence of both total residual angle and trajectory through the device...

the article reports a clinical case of a 39-year-old male patient who was admitted in the emergency room in shock. the clinical exams and additional tests identified a right massive hemothorax, without apparent etiological factors. he was submitted to an emergency right thoracotomy. a bulky varicose formation in the diaphragmatic surface, with evident laceration and haemorrhage was identified. ...

Background. No consensus between guidelines exists regarding neuroimaging in first-episode psychosis. The purpose of this study is to assess anomalies found in structural neuroimaging exams (brain computed tomography (CT) and magnetic resonance imaging (MRI)) in the initial medical work-up of patients presenting first-episode psychosis. Methods. The study subjects were 32 patients aged 18-48 ye...

Recent reports of medical students performing pelvic exams for training purposes on anesthetized women without their consent have produced a firestorm of controversy and calls for greater regulation. Despite periodic efforts to reform the practice, such unauthorized practice is neither a recent phenomenon nor unique to the United States. Two small-scale studies published in 2003 hint at the ext...

Higher education retention research has taken on renewed importance in recent years with support for standardized entrance exams waning and student loan debts commanding social political attention. Economic pressures have further exasperated college attrition push researchers to better identify at-risk students before they experience academic difficulty. The purpose of this study was evaluate t...

Abstract Many Chinese students dislike hyper-competitive public school exams but find competing in e-sports games enjoyable. Some are perceived to game ‘too much’ by their parents, who, anxious about gaming's impact on grades, send children treatment camps for ‘Internet addiction’. This article documents parents’ and student-gamers’ experiences of competition China's formal education system, on...

Acetazolamide (AZA) reduces the water permeability of aquaporin-4, the predominant water channel in the brain. We determined the structure of aquaporin-4 in the presence of AZA using electron crystallography. Most of the features of the 5-Å density map were consistent with those of the previously determined atomic model. The map showed a protruding density from near the extracellular pore entra...