AIM Ventilation with pure oxygen (hyperoxic ventilation: HV) is thought to decrease whole body oxygen consumption (VO(2)). However, the validity and impact of this phenomenon remain ambiguous; until now, under hyperoxic conditions, VO(2) has only been determined by the reverse Fick principle, a method with inherent methodological problems. The goal of this study was to determine changes of VO(2...

BACKGROUND Altered hypothalamus-pituitary-adrenal (HPA) axis function and reduced hippocampal volume (HV) are established correlates of stress vulnerability. We have previously shown an attenuated cortisol awakening response (CAR) and associations with HV specifically in male first-episode psychosis patients. Findings in individuals at ultra-high risk (UHR) for psychosis regarding these neurobi...

This review summarizes evidence in humans for an association between hyperventilation (HV)-induced hypocapnia and a reduction in cerebral perfusion leading to syncope defined as transient loss of consciousness (TLOC). The cerebral vasculature is sensitive to changes in both the arterial carbon dioxide (PaCO2) and oxygen (PaO2) partial pressures so that hypercapnia/hypoxia increases and hypocapn...

Hydroa vacciniforme (HV) is a photosensitivity disorder in childhood characterized by recurrent vacciniform vesicles, necrotic ulcers, and scars on sun-exposed areas. HV-like lymphoma is a rare variant of cutaneous T-cell lymphoma. HV, atypical HV and HV-like lymphoma belong to the spectrum of Epstein-Barr virus (EBV)-associated lymphoproliferative disorders. We report a fatal case of HV-like l...

This paper presents a new technique for accurately modeling uni-directional High-Voltage lightly-doped-drain MOS (HV MOS) devices by extending the bi-directional HV MOS model and adopting a new parameter extraction method. We have already reported on a SPICE model for bi-directional HV MOS devices based on BSIM3v3. However, if we apply this bi-directional HV MOS model and its parameter extracti...

(2) HV def = −∂ x + V (x), on R, or on [0,∞) with Dirichlet or Neumann boundary conditions. The resonances or scattering poles of HV are defined as the poles of the meromorphic continuation of the resolvent, RV (λ) = (HV − λ ), from Imλ > 0, to C. Except for the poles at λ for which λ are eigenvalues of HV , RV (λ) is bounded on L 2 for Imλ > 0. Its Schwartz kernel, that is the Green function, ...

Introduction A high-voltage (HV) electrical short circuit can be a critical electrical failure in an implantable cardioverter-defibrillator (ICD) system because of the failed delivery of appropriate shocks against fatal arrhythmia. The Food and Drug Administration has classified the St Jude Medical Riata family of ICD leads (St Jude Medical, St Paul, MN) as a class I recall since 2011 because o...

Accurate CCD observations of three Cepheids in the SMC were made with the purpose of confirming their nature of second overtone mode Cepheids. The stars were suspected pulsating in the second overtone mode owing to the unusual light curve and short period reported by Payne-Gaposchkin & Gaposchkin (1966). The analysis of the new data shows that for two stars the previous periods are wrong, and i...

Roads and railways are in a sense the arteries that keep the lifeblood of the economy flowing. Approximately 70 percent of freight moves by road in South Africa and it is growing by approximately four percent per annum. Data and information on heavy vehicle (HV) volumes and axle masses are therefore indispensable to road authorities for design and maintenance purposes. Heavy vehicle data from t...

The effects of hyperventilation (HV) on mean arterial pressure (MAP) are variable. To identify factors affecting the MAP response to HV, we dissected the effects of hypocapnic HV (HHV) and isocapnic HV (IHV) and evaluated the effects of acute vs. prolonged HHV. In 11 healthy subjects the cardio- and cerebrovascular effects of HHV and IHV vs. normal ventilation were examined for 15 min in the su...