Library

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • 1995-1999  (2)
  • 07.03.2 Comet C/1995 O1:Hale–Bopp  (1)
  • Bladder temperature  (1)
Material
Years
  • 1995-1999  (2)
Year
  • 1
    ISSN: 1573-0794
    Keywords: 07.03.2 Comet C/1995 O1:Hale–Bopp ; 13.18.4
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The concept of simultaneous multifrequency continuum observations, successfully tested on Comet Hyakutake, was applied to Comet Hale-Bopp, using the Heinrich Hertz Submillimeter Telescope (HHT) with the four color bolometer between 250 and 870 GHz, the IRAM 30m telescope at 240 Ghz, the MPIfR 100-m telescope at 32 GHz, and the IRAM interferometer near 90 and 240 GHz. Near-simultaneous measurements were done between February 15 and April 26, 1997, mainly concentrated in mid March shortly before perigee of the comet. The measurements gave the following preliminary results: Interferometer detection of the nuclear thermal emission. If the signal at the longest interferometer spacing of 170 mis due to thermal emission from the nucleus only, its equivalent diameter is ∼49 km. If, however, this signal contains a contribution from a strongly centrally peaked halo distribution(e.g., r−2 density variation) the diameter may be as low as 35 km. The emission found interferometrically was always 5″ north and 0.1 sec east from the position predicted by Yeoman's solution 55.The comparison of the interferometric continuum emission with the simultanously obtained molecular line observations (reported on this conference) shows the origin of the strongest line emission concentrated on the nucleus. The 30-m observations show a radio halo with a gaussian FWHP of ∼11, corresponding to a diameter of 11000 km at geocentric distance of 1.2 a.u. A spectral index of ∼3.0 for the total signal, which may indicate a smaller mean particle size than for Hyakutake. Assuming an average cometary density of 0.5 gcm−3, the mass contained in the nucleus is ∼1$#x2013;3 1019 g and 1012 g in the particle halo.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    ISSN: 1432-055X
    Keywords: Schlüsselwörter Postoperative Phase ; Ösophagustemperatur ; Blasentemperatur ; Rektaltemperatur ; Vergleich verschiedener Meßorte ; Key words Postoperative period ; Oesophageal temperature ; Bladder temperature ; Rectal temperature ; Comparison of different sites of measurement
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Abstract Objective: The data of 60 postoperatively sedated and ventilated patients were studied for analysis of oesophageal, bladder, and rectal temperatures. The purpose of the investigation was to clarify whether changes of oesophageal temperature are adequately reflected by bladder and rectal temperatures and whether the rate of rewarming has an influence on the accuracy of the latter two sites. Methods: For temperature recording, a Hi-Lo Temp® esophageal stethoscope (Mallinckrodt Medical), a Foley FC400-18 catheter temperature sensor (Respiratory Support Products, Mallinckrodt Medical), and a rectal temperature probe N401 (YSI) were used. Each probe and matching recording unit was calibrated over a range of 30–40 °C against a reference quartz thermometer (Hewlett packard Model 2801 A) in a thermostated water bath before the investigation. Five measuring points distributed over the whole period of rewarming were evaluated. Patients were assigned to groups with slow and fast rewarming, respectively. Agreement between the methods of measurement was assessed as described by Bland and Altman. Furthermore, differences between the oesophageal and bladder or rectal temperature were checked at each measuring point for statistical significance using the t-test. Results: In regard to oesophageal temperature, the bladder and rectal temperatures had biases of –0.01 °C and –0.03 °C, respectively. Limits of agreement (±2 s) were ±0.68 °C and ±0.82 °C, respectively. The bias of the bladder temperature was independent of the rate of rewarming (Fig. 3). The bias of the rectal temperature, however, differed in regard to the rewarming rate, being +0.06 °C in the group with slow rewarming and –0.13 °C in the group with fast rewarming (Tables 1 and 2, Fig. 1 and 2). These differences were significant for the measuring points 4 and 5 (Fig. 4). Conclusions: Bladder and rectal temperatures can accurately indicate the oesophageal temperature with a very small bias in postoperatively sedated and ventilated patients. Since the rate of rewarming influences the accuracy of rectal temperature readings, monitoring of bladder temperature seems to be more favourable in the postoperative period.
    Notes: Zusammenfassung In einer retrospektiven Untersuchung wurden bei 60 postoperativ nachbeatmeten Patienten während der Phase der Wiedererwärmung die Temperaturen in Ösophagus, Blase und Rektum miteinander verglichen. Ziel der Untersuchung war zu klären, wie gut Blasen- und Rektaltemperatur mit der Ösophagustemperatur übereinstimmten und ob die Wiedererwärmungsgeschwindigkeit einen Einfluß auf die Genauigkeit dieser beiden Meßorte hatte. Material und Methoden: Es wurden fünf Meßpunkte pro Patient berücksichtigt, die zu gleichen Teilen über die Wiedererwärmungsperiode verteilt wurden. Um den Einfluß der Wiedererwärmungsgeschwindigkeit zu erfassen, wurden die Patienten retrospektiv einer Gruppe mit schneller oder langsamer Wiedererwärmung zugeordnet. Ergebnisse: Die Blasentemperatur weist gegenüber der Ösophagustemperatur eine systematische Abweichung von –0,01 °C und eine Meßunsicherheit (±2 s) von ±0,68 °C auf und ist unabhängig von der Wiedererwärmungsgeschwindigkeit. Die Rektaltemperatur zeigt eine systematische Abweichung von –0,03 °C und eine Meßunsicherheit von ±0,82 °C. Die systematische Abweichung der Rektaltemperatur betrug bei langsamer Wiedererwärmung ±0,06 °C, bei schneller Wiedererwärmung hingegen –0,13 °C. Die Unterschiede waren für die Meßpunkte 4 und 5 statistisch signifikant. Schlußfolgerung: Aus diesem Grund scheint die Messung der Blasentemperatur in der postoperativen Phase vorteilhafter zu sein als die Messung der Rektaltemperatur.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...