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  • 1
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    Untersuchungen über die Fritfliege am Mais anlässlich eines starken Auftretens im Jahre 1958 (1958)
    In:  Nachrichtenblatt für den deutschen Pflanzenschutzdienst 12, Heft 11; p.201-209
    Details
    Publication Date: 1958
    Description: Der Autor fasst Informationen über Schadbild, Entwicklung, Bekämpfung und natürliche Feinde aus der Literatur zusammen und vergleicht diese teilweise mit eigenen Beobachtungen. Auch der Einfluß klimatischer Parameter wird zum Teil beleuchtet. So wurde bei der Temperatur 4°C als Minimum und 32°C als Optimum und bei der rel.Luftfeuchtigkeit 86% als Minimum der Embryonalentwicklung ermittelt. Für eine kontinuierliche Larvenentwicklung wurden 12°C als Minimum und 28°C als Optimum (6-7 Tage Entw.zeit) ermittelt. Epidemischer Befall und sehr gute Generationenfolge ist ab erreichen von 470 Wärmeeinheiten bzw. warme, nicht zu trockene Witterung mit 15-20°C in den Sommermonaten zu erwarten. KATASTER-BESCHREIBUNG: KATASTER-DETAIL:
    Keywords: DDR ; 1958 ; Mais ; Pflanzenschädling
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    BIBLIOGRAPHY INKA BB
  • 2
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    Untersuchungen über die Lebensweise und Entwicklung der Maulwurfsgrille (Gryllotalpa vulgaris Latr.) im Lande Brandenburg (1958)
    In:  Beiträge zur Entomologie, p.334-365
    Details
    Publication Date: 1958
    Description: Der Autor beschreibt den Einfluß von Feuchtigkeit und Temperatur im Boden und der Luft auf verschiedene Entwicklungsabschnitte der Maulwurfsgrille. Neben beschreibenden Beobachtungen im Feld wurden auch Kardinalwerte im Labor erhoben. Die Optimaltemperatur liegt bei ausreichender Feuchtigkeit bei 25-35°C. Das Entwicklungsmaximum liegt bei rel.Luftfeuchte 95-100% bei ca.43°C. Das Entwicklungsminimum liegt bei 0°C Bodentemperatur, wobei die Lufttemperatur niedriger sein kann, da sich die Insekten dann in den Boden zurückziehen. Die Haupteinflußfaktoren auf die Entwicklung bzw. das Überleben der Maulwurfsgrille sind Kannibalismus, Temperatur, Feuchtigkeit und Feinde. Diese modifizieren das Schlupfergebnis von 50-60% bis zu 95-100%. Ein Vergleich zwischen Bedingungen in Brandenburg und Südeuropa wird gezogen. KATASTER-BESCHREIBUNG: Einfluß von Feuchte und Temperatur auf den Entwicklungszyklus im Allgemeinen und die Eizeit im Speziellen. KATASTER-DETAIL: Die Eizeit schwankt zwischen 2-4 Wochen, kann aber bei hoher Luftfeuchtigkeit und einer Bodentemperatur von 22-28°C (Lufttemp.30°C) auf 10 Tage sinken. Bei spät gelegten Eiern (Ende Sept.-Okt.), hoher Bodenfeuchte und Bodentemp. 15-17°C steigt die Eizeit auf 5-6 Wochen. Je wärmer der Sommer und je milder der Winter, desto kürzer ist der Entwicklungszyklus (bei günstigen Bedingungen 1 Jahr, bei schlechteren 2 Jahre).
    Keywords: Brandenburg ; Tabak ; Forst ; Getreide ; Landwirtschaft ; Pflanzenschädling ; Hackfrüchte ; Obst ; Zierpflanzen ; Gemüse
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    BIBLIOGRAPHY INKA BB
  • 3
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    Adaptive momentum management for the dual keel Space Station (1987)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: The report discusses momentum management for a large space structure with the structure selected configuration being the Initial Orbital Configuration of the dual-keel Space Station. The external torques considered were gravity gradient and aerodynamic torques. The goal of the momentum management scheme developed is to remove the bias components of the external torques and center the cyclic components of the stored angular momentum. The scheme investigated is adaptive to uncertainties of the inertia tensor and requires only approximate knowledge of principal moments of inertia. Computational requirements are minimal and should present no implementation problem in a flight-type computer. The method proposed is shown to be effective in the presence of attitude control bandwidths as low as 0.01 radian/sec.
    Keywords: SPACECRAFT DESIGN, TESTING AND PERFORMANCE
    Type: AIAA PAPER 87-2596
    Format: text
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  • 4
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    Autonomous momentum management for the CDG planar Space Station (1985)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: This paper discusses momentum management for the CDG Planar Space Platform. The external torques on the Space Station are assumed to be gravity gradient and aerodynamic with both having bias and cyclic terms. The integrals of the cyclic torques are the cyclic momenti which will be stored in the momentum storage actuator. Various techniques to counteract the bias torques and center the cyclic momentum were investigated including gravity gradient desaturation by adjusting vehicle attitude, aerodynamic desaturation using solar panels and radiators and the deployment of flat plates at the end of long booms generating aerodynamic torques.
    Keywords: SPACECRAFT DESIGN, TESTING AND PERFORMANCE
    Type: AIAA PAPER 85-0031
    Format: text
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  • 5
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    Adaptive momentum management for large space structures (1987)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Momentum management is discussed for a Large Space Structure (LSS) with the structure selected configuration being the Initial Orbital Configuration (IOC) of the dual keel space station. The external forces considered were gravity gradient and aerodynamic torques. The goal of the momentum management scheme developed is to remove the bias components of the external torques and center the cyclic components of the stored angular momentum. The scheme investigated is adaptive to uncertainties of the inertia tensor and requires only approximate knowledge of principle moments of inertia. Computational requirements are minimal and should present no implementation problem in a flight type computer and the method proposed is shown to be effective in the presence of attitude control bandwidths as low as .01 radian/sec.
    Keywords: SPACECRAFT DESIGN, TESTING AND PERFORMANCE
    Type: NASA-CR-179085 , NAS 1.26:179085
    Format: application/pdf
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  • 6
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    Autonomous momentum management for space station (1984)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Momentum management for the CDG planar space platform is discussed. It is assumed that the external torques on the space station are gravity gradient and aerodynamic, both have bias and cyclic terms. The integrals of the cyclic torques are the cyclic momenti which will be stored in the momentum storage actuator. Techniques to counteract the bias torques and center the cyclic momentum and gravity gradient desaturation by adjusting vehicle attitude, aerodynamic desaturation using solar panels and radiators and the deployment of flat plates at the end of long booms generating aerodynamic torques are investigated.
    Keywords: SPACECRAFT DESIGN, TESTING AND PERFORMANCE
    Type: NASA-CR-174065 , NAS 1.26:174065
    Format: application/pdf
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  • 7
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    Autonomous momentum management for space station, exhibit A (1984)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The report discusses momentum management for the CDG Planar Space Platform. The external torques on the Space Station are assumed to be gravity gradient and aerodynamic with both having bias and cyclic terms. The integrals of the cyclic torques are the cyclic momenti which will be stored in the momentum storage actuator. Various techniques to counteract the bias torques and center the cyclic momentum were investigated including gravity gradient desaturation by adjusting vehicle attitude, aerodynamic desaturation using solar panels and radiators and the deployment of flat plates at the end of long booms generating aerodynamic torques.
    Keywords: SPACECRAFT DESIGN, TESTING AND PERFORMANCE
    Type: NASA-CR-171256 , NAS 1.26:171256
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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