Use of tissue equivalent proportional counters to characterize radiation quality on the space shuttle

Tissue equivalent proportional counters (TEPC) are essentially cavity ionization chambers operating at low pressure and with gas gain. A small, battery powered, TEPC spectrometer, which records lineal energy spectra at one minute intervals, has been used on several space shuttle missions. The data it has collected clearly show the South Atlantic anomaly and indicate a mean quality factor somewhat higher than expected. An improved type of instrument has been developed with sufficient memory to record spectra at 10 second intervals, and with increased resolution for low LET events. This type of instrument will be used on most future space shuttle flights and in some international experiments

「グレイの悲歌」解釈試論 : ラッセルにおける表示について

Gray's Elegy Argument has been regarded not only as the most puzzling passage in 'On Denoting', but as the greatest riddle within the field of Analytic Philosophy, which racks every interpreter's brain. But it is not impossible to realize the Argument consistently if we take notice of the two difficulties which Russell points out in paragraph twenty. The first difficulty consist in the distinction between meaning and denotation in a denoting phrase, and the second in the relation of meaning and denotation. The phase contrast of these two difficulties can make clear the equivocality of the symbol C, that C stands for denoting phrase in the first phase, and, on the contrary, that C stands for meaning in the second phase

Use of tissue equivalent proportional counters to characterize radiation quality on the space shuttle

Tissue equivalent proportional counters (TEPC) are essentially cavity ionization chambers operating at low pressure and with gas gain. A small, battery powered, TEPC spectrometer, which records lineal energy spectra at one minute intervals, has been used on several space shuttle missions. The data it has collected clearly show the South Atlantic anomaly and indicate a mean quality factor somewhat higher than expected. An improved type of instrument has been developed with sufficient memory to record spectra at 10 second intervals, and with increased resolution for low LET events. This type of instrument will be used on most future space shuttle flights and in some international experiments

Automated systems for measuring dose and radiation quality as a function of time

A compact, modular, tissue equivalent proportional counter system has been developed for use in space. The data acquisition system consists of a microcomputer, multi channel analyzer, memory, and power converter on individual circuit cards which can be used in various combinations for specific measurement requirements. The system uses separate, interchangeable detectors, each with its preamplifier and shaping amplifier connected directly to the detector. The microprocessor provides the computing power of a personal computer, and utilizes an operating system which is compatible with a subset of MSDOS. Experiment procedures can be programmed in high level languages and down loaded to the microprocessor. A typical application, used to characterize the dose rates due to trapped radiations in space, monitors the dose rate and records energy deposition spectra frequently when the dose rate is high. The microprocessor also measures and records system operation characteristics such as MCA linearity, proportional counter gain, and power supply voltages on a periodic basis

A poem. Occasioned by the militia bill, now depending. [electronic resource] : Addressed to the ladies of Great Britain. Written by a gentlewoman, author of the Elegy on the Bishop of Sodor and Man.

Electronic reproduction.English Short Title Catalog,Reproduction of original from Harvard University Houghton Library

Automated systems for measuring dose and radiation quality as a function of time

A compact, modular, tissue equivalent proportional counter system has been developed for use in space. The data acquisition system consists of a microcomputer, multi channel analyzer, memory, and power converter on individual circuit cards which can be used in various combinations for specific measurement requirements. The system uses separate, interchangeable detectors, each with its preamplifier and shaping amplifier connected directly to the detector. The microprocessor provides the computing power of a personal computer, and utilizes an operating system which is compatible with a subset of MSDOS. Experiment procedures can be programmed in high level languages and down loaded to the microprocessor. A typical application, used to characterize the dose rates due to trapped radiations in space, monitors the dose rate and records energy deposition spectra frequently when the dose rate is high. The microprocessor also measures and records system operation characteristics such as MCA linearity, proportional counter gain, and power supply voltages on a periodic basis

Ventriloque et sa poupée : ‟Let not Ambition mock their useful toil, their homely ways [joys] and destiny obscureˮ

Gravure extraite d’un ouvrage en anglais non identifié, XVIII e siècletéléchargeabl