2014 A method using a capacitive microphone as an ionization chamber enables the ionizing collision of a fast particle with a gas atom to be observed. The probability of this collision and the corresponding number of electrons removed were measured in air, for 4 MeV alpha particles leaving a radioactive source. Tome 39 N° 15 ler AOL1T 1978 LE JOURNAL DE PHYSIQUE LETTRES Classification Physics A...

Wagner et al. (1998) showed that inorganic C determined as the difference between total C by combustion Soil organic C (SOC) analyses using high temperature induction furnace and SOC where soils are acidified before comfurnace combustion methods have become increasing popular because of advances in instrumentation. Combustion methods, however, also bustion had a close correlation with their vol...

We begin by accepting that introspective evidence is important to cognitive science. However, as its history shows, introspection is risky, so methods should be used that minimize those risks. We argue that there are 13 ways that a beeper can reduce those risks, dividing those ways into three categories: time sampling per se, minimizing the reactive disturbance of evanescent phenomena, and aidi...

Temperature-controlled ellipsometersSection:ChooseTop of pageTemperature-controlled el... <<Micropumps for small liqu...High-bandwidth midrange s...Cryogen-free dilution ref...Integrated platform oscil...Time-domain terahertz pla...Compact high-performance ...Plastic-analysis systemSmart, remote data loggin...Real-time wideband record...Software unlimited-ra...Digitizer with flexible a... J. A....

The reaction of pentaerythritol tetranitrate reductase with reducing and oxidising substrates has been studied by stopped-flow spectrophotometry, redox potentiometry and X-ray crystallography. We show in the reductive half-reaction of PETN reductase that NADPH binds to form an enzyme -NADPH charge -transfer intermediate prior to hydride transfer from the nicotinamide coenzyme to FMN. In the oxi...

We begin by accepting that introspective evidence is important to cognitive science. However, as its history shows, introspection is risky, so methods should be used that minimize those risks. We argue that there are 13 ways that a beeper can reduce those risks, dividing those ways into three categories: time sampling per se, minimizing the reactive disturbance of evanescent phenomena, and aidi...

A high-temperature Seebeck effect calorimeter, in which the thermoelectric emf across a large-area enveloping thermopile is a measure of the heat flux from a power source, has been constructed to examine the claimed generation of excess thermal energy from a protonconducting oxide immersed in deuterium gas. The claim has been confirmed in a few experiments out of many unsuccessful ones. INTRODU...

Variable Frequency Drives induce shaft voltages onto the shaft of the driven motor because of the extremely high speed switching of the insulated gate bipolar transistors which produce the pulse width modulation used to control AC motors in heating, ventilation, air conditioning and refrigeration systems. This voltage induced on the shaft becomes great enough to overcome the dielectric of the o...

In order to help readers stay up-to-date in the field, each issue of Progress Photovoltaics will contain a list recently published journal articles that are most relevant its aims and scope. This is drawn from an extremely wide range journals, including IEEE Journal Photovoltaics, Solar Energy Materials Cells, Renewable Energy, Sustainable Reviews, Applied Physics, Physics Letters. To assist re...

We fabricate graphene-TiOx-Al tunnel junctions and characterize their radio frequency response. Below the superconducting critical temperature of Al and when biased within the superconducting gap, the devices show enhanced dynamic resistance which increases with decreasing temperature. Application of radio frequency radiation affects the dynamic resistance through electronic heating. The relati...