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  • 1990-1994  (4)
  • 1985-1989  (2)
  • 1955-1959  (1)
  • 1
    Digitale Medien
    Digitale Medien
    Histogramming data acquisition system for an (e,2e) coincidence experiment (1992)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 63 (1992), S. 1922-1926 
    Details
    ISSN: 1089-7623
    Quelle: AIP Digital Archive
    Thema: Physik , Elektrotechnik, Elektronik, Nachrichtentechnik
    Notizen: A four-dimensional histogramming data acquisition system has been developed for use on an 80386 IBM-compatible computer. The method has a large data storage capacity providing good experimental resolution and system flexibility. A custom-built analog-to-digital board generates a memory address in hardware from the incoming data which permit the use of a simple and elegant histogramming algorithm. The system is used to collect and analyze data from (e,2e) experiments. Results from coplanar symmetric (e,2e) experiments on argon, at an incident energy of 3 keV, are presented to demonstrate the performance of the instrument. The method is applicable to experiments where data from several sources have to be combined and then histogrammed in real time.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.1143305
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  • 2
    Digitale Medien
    Digitale Medien
    Photofragment spectroscopy and dissociation dynamics of N2+2: A 1Πu–X 1Σ+g (1994)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 100 (1994), S. 4766-4774 
    Details
    ISSN: 1089-7690
    Quelle: AIP Digital Archive
    Thema: Physik , Chemie und Pharmazie
    Notizen: The 9–0 and 9–1 transitions of the A 1Πu–X 1Σ+g system of N2+2 have been observed by fast ion beam photofragment spectroscopy. Multireference configuration interaction ab initio calculations predict v'=8 to be the highest bound level which seemed to be supported by experimental evidence. The dominant predissociation mechanism for the v'=9 level appears to be through tunneling, unlike the v'=6, 7, and 8 levels, which show an e/f symmetry-dependent electronic predissociation. Calculated tunneling lifetimes from our own modified A 1Πu state potential gives good agreement with the experimental lifetimes. In addition to the 9–1 and 9–0 bands, we have also measured the previously unobserved 7–0 and 8–0 rovibronic transitions thus extending Cosby, Müller, and Helm's study to the blue [Phys. Rev. A 28, 766 (1983)]. Molecular constants have been determined for the v=0 of the X 1Σ+g state and v=7, 8, and 9 of the A 1Πu state.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.466267
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  • 3
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    Unbekannt
    CHARACTER TRAINING AT RIYOM (illustrated) (1956)
    London : Periodicals Archive Online (PAO)
    Community development journal. 7:3 (1956:June) 53 
    Details
    ISSN: 0010-3802
    Thema: Politikwissenschaft , Sociologie
    Notizen: Northern Nigeria
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:6076-1956-007-03-000003
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  • 4
    Digitale Medien
    Digitale Medien
    Incomplete idempotent Schröder quasigroups and related packing designs (1994)
    Springer
    Aequationes mathematicae 48 (1994), S. 116-116 
    Details
    ISSN: 1420-8903
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Mathematik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01837987
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  • 5
    Digitale Medien
    Digitale Medien
    Resolvable Mendelsohn designs with block size 4 (1990)
    Springer
    Aequationes mathematicae 40 (1990), S. 248-260 
    Details
    ISSN: 1420-8903
    Schlagwort(e): Primary 05B05 ; Secondary 05C20
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Mathematik
    Notizen: Summary Letv andK be positive integers. A (v, k, 1)-Mendelsohn design (briefly (v, k, 1)-MD) is a pair (X,B) whereX is av-set (ofpoints) andB is a collection of cyclically orderedk-subsets ofX (calledblocks) such that every ordered pair of points ofX are consecutive in exactly one block ofB. A necessary condition for the existence of a (v, k, 1)-MD isv(v−1) ≡ 0 (modk). If the blocks of a (v, k, 1)-MD can be partitioned into parallel classes each containingv/k blocks wherev ≡ ) (modk) or (v − 1)/k blocks wherev ≡ 1 (modk), then the design is calledresolvable and denoted briefly by (v, k, 1)-RMD. It is known that a (v, 3,1)-RMD exists if and only ifv ≡ 0 or 1 (mod 3) andv ≠ 6. In this paper, it is shown that the necessary condition for the existence of a (v, 4, 1)-RMD, namelyv ≡ 0 or 1 (mod 4), is also sufficient, except forv = 4 and possibly exceptingv = 12. These constructions are equivalent to a resolvable decomposition of the complete symmetric directed graphK v * onv vertices into 4-circuits.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02112298
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  • 6
    Digitale Medien
    Digitale Medien
    Allorhogas pyralophagus [Hym.: Braconidae], a gregarious external parasite imported into texas, USA, for biological control of the stalkborerEoreuma loftini [Lep.: Pyralidae] on sugar cane (1987)
    Springer
    BioControl 32 (1987), S. 477-482 
    Details
    ISSN: 1573-8248
    Schlagwort(e): Allorhogas pyralophagus ; classical biological control ; sugar cane ; Eoretima loftini ; Allorhogas pyralophagus ; lutte biologique classique ; canne à sucre ; Eoreuma loftini
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Beschreibung / Inhaltsverzeichnis: Résumé Allorhogas pyralophagus Marsh est un braconide doryctine récemment découvert qui constitue un agent de lutte biologique potentiel contre les mineuses s'attaquant aux cultures de graminées à tiges larges ou étroites. Cet ectoparasite grégaire a été elevé à l'origine à partir de larves d'Eoreuma loftini (Dyar) présentes dans des tiges de sorgo d'Alep [Sorghum halepense (L.) Pers.] et de canne à sucre (Saccharum officinarum L.) récoltées dans les Etats du Sinaloa et du Nuevo Leon au Mexique.A. pyralophagus peut être élevé aisément en laboratoire sur une grande variété d'hôtes [Diatrae spp.E. loftini, Chilo sp., etTryporyza nivella (F.)]. Ces hôtes sont placés dans des tiges de graminées ou des «pailles» en papier pour être ensuite exposés à des femelles prêtes à pondre.A. pyralophagus a été libéré dans des cultures et on l'a retrouvé parasitant les insectes ravageurs de la canne à sucre suivants:E. loftini etD. saccharalis (F.) au Texas,diatraea spp. à Trinidad,D. rufescens en Bolivie, etT. nivella à Sumatra en Indonésie.
    Notizen: Abstract Allorhogas pyralophagus Marsh is a recently discovered doryctine braconid with potential for field trials against stalk borers infesting both large- and small- stemmed Graminacea. This external gregarious parasite was originally reared fromEoreuma loftini (Dyar) larvae infesting Johnson grass [Sorghum halepense (L.) Pers.] and sugar cane (Saccharum officinarum L.) from the states of Sinaloa and Nuevo Leon, Mexico. The parasite is easily reared in the laboratory using a wide range of host larvae [Diatraea spp.,E. loftini, Chilo sp. andTryporyza nivelli (F)]. Hosts are placed in grass stems or paper straws for exposure to ovipositing females.A. pyralophagus has been field released and recovered from the following hosts infesting sugar cane:E. loftini andD. saccharalis (F.) in Texas.Diatraea spp. in Trinidad,D. rufescens in Bolivia andT. nivella in Sumatra, Indonesia.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02373516
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  • 7
    Digitale Medien
    Digitale Medien
    Effect of sevoflurane on P50 and on measurement of oxygen tension (1988)
    Springer
    Journal of clinical monitoring and computing 4 (1988), S. 261-263 
    Details
    ISSN: 1573-2614
    Schlagwort(e): Anesthetics: sevoflurane ; Blood: hemoglobin ; Oxygen: tension ; Monitoring: oxygen
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Informatik , Medizin
    Notizen: Abstract Fresh samples of heparinized human blood from 10 healthy nonsmoking volunteers were used to study the effect of the inhaled anesthetic sevoflurane on the oxygen half-saturation pressure of hemoglobin (P50) and on polarographic measurements of oxygen tension at low values. Control samples had a baseline P50 of 26.9±0.2 mm Hg. When the blood samples were exposed to 1.75% (1 minimum alveolar concentration, MAC), 2.75%, and 3.5% (2 MAC) of sevoflurane, the P50 values were 27.0±0.5 mm Hg, 27.1±0.4 mm Hg, and 26.9±0.5 mm Hg, respectively. Our present data show that 1 to 2 MAC sevoflurane has no significant effect on P50 (P〉0.05). Our data also show that sevoflurane did not interfere with polarographic measurements of oxygen tension (P〉0.05). Other inhaled agents—halothane, enflurane, and isoflurane—do interfere with these measurements, and we cannot explain the difference.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01617323
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