ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Ihre E-Mail wurde erfolgreich gesendet. Bitte prüfen Sie Ihren Maileingang.

Leider ist ein Fehler beim E-Mail-Versand aufgetreten. Bitte versuchen Sie es erneut.

Vorgang fortführen?

Exportieren
Filter
  • 2010-2014
  • 1990-1994  (25)
  • 1980-1984
  • 1975-1979  (13)
  • 1970-1974
  • 1945-1949
  • 1994  (25)
  • 1975  (13)
Sammlung
Schlagwörter
Verlag/Herausgeber
Erscheinungszeitraum
  • 2010-2014
  • 1990-1994  (25)
  • 1980-1984
  • 1975-1979  (13)
  • 1970-1974
    • +
Jahr
  • 1
    Digitale Medien
    Digitale Medien
    Frankfurt EBIS development: Fundamental research and new applications : Proceedings of 5th international conference on ion sources (1994)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 65 (1994), S. 1069-1071 
    Details
    ISSN: 1089-7623
    Quelle: AIP Digital Archive
    Thema: Physik , Elektrotechnik, Elektronik, Nachrichtentechnik
    Notizen: Fundamental questions of electron beam ion sources (EBIS) are studied using three different setups. Cryogenic classical EBIS: The limit of ion–ion cooling in EBIS devices operating near the space-charge neutralization limit has been studied experimentally. To investigate different degrees of compensation of the electron beam by highly charged ions, a hemispherical analyzer has been constructed including a novel deceleration optic for high resolution. Using its energy definition we tested different modes of ion transportation in our multipassage magnetic spectrometer, which can be operated chromatically as well as extremely dispersively: up to 200 passages could be obtained. EBIS without magnetic field: First results on ion production in the short trap at the very dense crossover of an electron beam (XEBIS) confined only inertially without the use of magnetic fields are presented. Normal conducting short EBIS: Using a normal conducting field of 0.8 T of 25-cm length an EBIS is under construction to study extremely short ion extraction of approximately 4 μs for single turn injection into a medical synchrotron for cancer therapy (MEDEBIS).
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.1145065
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 2
    Digitale Medien
    Digitale Medien
    Liquid scintillation detectors for gamma and neutron diagnostic at TEXTOR and results of runaway and sawtooth oscillations (1994)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 65 (1994), S. 2594-2598 
    Details
    ISSN: 1089-7623
    Quelle: AIP Digital Archive
    Thema: Physik , Elektrotechnik, Elektronik, Nachrichtentechnik
    Notizen: Time and energy resolved neutron and gamma measurements are performed at the TEXTOR tokamak with a fast liquid NE-213 scintillator. To distinguish between neutron and gamma (γ)-ray induced events, pulse shape discrimination is used. To suppress scattered radiation, the detector is installed in well-shielded collimators aligned radially or tangentially to the plasma current. Count rates up to 2–3×105 s−1 can be processed without considerable reduction of n/γ discrimination and without gain instability. To demonstrate the capability of this system, typical results are presented as obtained from plasmas in TEXTOR during sawtooth oscillations, runaway discharges, pellet injection, and neutral beam injection.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.1144657
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 3
    Digitale Medien
    Digitale Medien
    Quantization error of slit-grid emittance measurement devices : Proceedings of 5th international conference on ion sources (1994)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 65 (1994), S. 1462-1464 
    Details
    ISSN: 1089-7623
    Quelle: AIP Digital Archive
    Thema: Physik , Elektrotechnik, Elektronik, Nachrichtentechnik
    Notizen: Slit-grid emittance measurement devices usually do not scan the beam continously but in fixed linear (x) and angular (x') steps. Thus in an emittance measurement performed with a slit-grid system, the beam is represented by a number of phase space boxes with a constant area or volume determined by the linear and angular resolution. Considering the emittance as the area in the two-dimensional subspace (x,x') covered by the beam, the quantization error and its dependence on the resolution (linear and angular) as well as the influence of the beam parameters is discussed. Measuring the very low emittance of the high efficiency source (HIEFS) proved that the quantization error can be unacceptably high ((very-much-greater-than)100%). With an optimized measuring device, the normalized emittance came down from 10−1 to 3.6×10−3 π mm mrad. Finally, a typical misleading result of an emittance measurement, caused by the quantization error, is presented.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.1144946
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 4
    Digitale Medien
    Digitale Medien
    Tris(trimethylphosphine)cobalt(I) halides. Preparation and properties (1975)
    s.l. : American Chemical Society
    Inorganic chemistry 14 (1975), S. 473-477 
    Details
    ISSN: 1520-510X
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1021/ic50145a004
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 5
    Digitale Medien
    Digitale Medien
    Laser-cooling effects in few-ion clouds of Yb+ (1994)
    Springer
    Applied physics 59 (1994), S. 179-185 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 32.80.Pj
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract We report some laser-cooling effects in a few172Yb+ ions held in a Paul trap. Pronounced cloud-to-crystal phase transitions have been observed as discontinuities in the Yb+ fluorescence spectrum of the 369 nm cooling transition. The first reported two-dimensional images of Yb+ clouds with evidence of crystal structure have been recorded using a photon-counting position-sensitive detector. An ion temperature of 100 mK has been estimated from the size of a single ion image. Step-wise cooling of a re-heated, few-ion Yb+ cloud was also observed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01081168
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 6
    Digitale Medien
    Digitale Medien
    Cytogenetische Untersuchung des peripheren Blutes beim familiären Neuroblastom (1975)
    Springer
    Human genetics 〈Berlin〉 28 (1975), S. 217-220 
    Details
    ISSN: 1432-1203
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Beschreibung / Inhaltsverzeichnis: Zusammenfassung Eine Familie mit 2 autoptisch gesicherten Neuroblastomen, einem Ganglioneuroblastom und Hinweisen auf 3 weitere Neuroblastome wurde cytogenetisch untersucht. Anlaß war der von Sandberg et al. (1972) mitgeteilte Befund von double-minute-Chromosomen in Lymphocyten des peripheren Blutes bei einem Neuroblastom. Die Untersuchung sollte klären, ob in dieser “Neuroblastom-Familie” eine chromosomale Aberration als erbliche Vorschädigung die Entstehung von Sympathicustumoren begüngstigt. Es fanden sich keine konstanten Chromosomenanomalien, auch keine double-minute-Chromosomen.
    Notizen: Summary A cytogenetic investigation was performed in a family which included 2 individuals with congential neuroblastomas of the suprarenal gland confirmed by autopsy and one with a ganglioneuroblastoma of the thoracic wall as well as 3 other individuals with tumors which probably were also neuroblastomas. The lymphocytes of the peripheral blood of 5 healthy relatives as well as of the child with the treated ganglioneuroblastoma failed to show a constant alteration of chromosomes. In this family, therefore, the suggestion could not be proofed that the very rate familial aggregation of neuroblastomas is caused by a hereditary chromosomal aberration.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00278547
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 7
    Digitale Medien
    Digitale Medien
    Absorption heat of GHz sound in polycrystalline metal films detected by multiple-beam interferometry and second-sound emission (1994)
    Springer
    Journal of low temperature physics 94 (1994), S. 567-583 
    Details
    ISSN: 1573-7357
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract In the GHz range, sound attenuation in polycrystalline films is dominated by elastic scattering at the grain boundaries. The attenuation by the much smaller absorption is hidden in the whole attenuation. We present a first attempt to detect the absorption. Sound-pulse experiments were done at low temperatures at frequencies of 8.8 GHz and 24 GHz in wedge-shaped Cu and Ag films using the method of multiple-beam interferometry with a lateral movable, highly collimated sound beam. The absorption heat is detected by recording the power of the second sound pulses emitted into the surrounding superfluid helium. The absorption coefficients can be obtained by fitting the measured interferograms to a proposed scattering model. They are many orders of magnitude lower than the measured attenuation coefficients, but are comparable with the predictions of Pippard.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00753828
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 8
    Digitale Medien
    Digitale Medien
    Social control and social contract in networking (1994)
    Springer
    Computer supported cooperative work 2 (1994), S. 89-108 
    Details
    ISSN: 1573-7551
    Schlagwort(e): TQM ; Communication ; Social Contract ; Empowerment ; Control ; Teams
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Informatik
    Notizen: Abstract Networks can be understood as organizational control strategies. As an example, we present two case studies of team-based networking strategies associated with the Total Quality Management movement in the United States. TQM's implied social contract requires some form of power sharing. In practice TQM team organization can also become another form of labor intensification. Similarly, TQM appeals to democratic values by emphasizing participation, communication, cooperation and team work. Such claims can also serve to legitimize major organizational changes, some of which follow familiar Taylorist patterns. Two cases illustrate how the technical components of communications systems help redefine control systems in TQM-based work rerganization experiments. In the manufacturing setting, communications took the form of web-and-hub networks, centralizing off-site engineering control of production workers. In the design and engineering workplace, peer-to-peer communications implemented by self-managed teams reduced intellectual ‘slack time’. In both cases the communications systems provided means to intensify labor.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00749285
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 9
    Digitale Medien
    Digitale Medien
    Determination of the parton distributions and structure functions of the proton from neutrino and antineutrino reactions on hydrogen and deuterium (1994)
    Springer
    The European physical journal 62 (1994), S. 575-600 
    Details
    ISSN: 1434-6052
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract This analysis is based on data from neutrino and antineutrino scattering on hydrogen and deuterium, obtained with BEBC in the (anti) neutrino wideband beam of the CERN SPS. The parton momentum distributions in the proton and the proton structure functions are determined in the range 0.01〈x〈0.7 and 2 GeV2 〈Q 2〈100 GeV2 by fitting suitable parametrisations to the experimentalx−y−Q 2-distributions. The QCD predictions are taken into account using the Altarelli-Parisi equations, with a resulting scale parameter $$\Lambda = \left( {192 \pm 40(stat.) \pm {}_{108}^{222} (syst.)} \right)MeV.$$
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01574161
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 10
    Digitale Medien
    Digitale Medien
    Determination of the ratior v =d v u v of the valence quark distributions in the proton from neutrino and antineutrino reactions on hydrogen and deuterium (1994)
    Springer
    The European physical journal 62 (1994), S. 601-607 
    Details
    ISSN: 1434-6052
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Based on a QCD analysis of the parton momentum distributions in the proton, the ratior v =d v /u v of thed andu valence quark distributions is determined as function ofx in the range 0.01〈x〈0.7. The analysis uses data from neutrino and antineutrino charged current interactions on hydrogen and deuterium, obtained with BEBC in the (anti)neutrino wideband beam of the CERN SPS. Since v mainly depends on the deuterium/hydrogen ratios of the normalisedx-y-Q 2-distributions many systematic effects cancel. It is found thatr v decreases with increasingx, and drops below the naiveSU(6) expectation of 0.5 forx≳0.3. An extrapolation ofr v tox=1 is consistent with the hypothesisr v (1)=0.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01574162
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
Schließen ⊗
Diese Webseite nutzt Cookies und das Analyse-Tool Matomo. Weitere Informationen finden Sie hier...