Optische Untersuchungen geloester und partikulaerer organischer Substanzen im Meer Verbund deutscher Beitraege zu Joint Global Ocean Flux Study (JGOFS II). Abschlussbericht

For quantitative in situ determination of dissolved organic matters (dom) and particular organic matters (pom) in the ocean a bio-optical probe system has been developed consisting of an in situ multi-wavelength fluorometer, a polychromatic nephelometer, a CTD, a radiometer and an underwater data unit connected with the board computer by a component conductor. The data unit assures the powr supply of the sensors, and it contains a miniaturized computer which controlles the four sensors. The probe system can be applied up to a depth of 6000 m, and it has been successfully tested during several field studies. A detailed discussion is given on the nature of the studied fluorescent matters. (WEN)Available from TIB Hannover: F96B1450+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEBundesministerium fuer Bildung, Wissenschaft, Forschung und Technologie, Bonn (Germany)DEGerman

Modular laser remote sensing systems for oceanographic applications: Development of shipborne lidar

Fluorescence spectra of seawater include information on several substances like gelbstoff, chlorophyll, aromatic molecules and particles. Vertical profiles of their concentration in the water column can be derived from a time-resolved registration of laser induced fluorescence, water Raman and elastic (Mie) scattering. First test measurements of this kind were performed in the Atlantic Ocean with a newly developed hydrographic lidar installed on board of RV 'Polarstern'. Series of depth profiles were obtained along the ship track with a vertical resolution of 0.5 m, typically, in water having an optical attenuation coefficient of about 0.2 m"-"1. Penetration depths ranged up to 40 m, depending on the seawater turbidity. (orig.)Available from TIB Hannover: F94B1410+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEBundesministerium fuer Forschung und Technologie (BMFT), Bonn (Germany)DEGerman

Optische Untersuchungen geloester und partikulaerer organischer Substanzen im Meer Beitrag zu JGOFS. Anlagen zum Abschlussbericht

A newly developed submergible fluorometer allows the in situ measurement of fluorescent matter in the water column. Three excitation wavelengths can be set to spectral regions where the fluorescence yield of naturally occurring substances or pollutants under investigation is high. Water Raman scattering and fluorescence signals are registered at specific wavelengths by use of a 10-channel detection assembly with modular structure. Particular emphasis is put on the long-term stability of the optical setup, and on the linearity of fluorescence readings versus substance concentration. (orig.)SIGLEAvailable from TIB Hannover: F94B0765+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Forschung und Technologie (BMFT), Bonn (Germany)DEGerman

Optische Untersuchungen geloester und partikulaerer organischer Substanzen im Meer Beitrag zu JGOFS. Abschlussbericht

In order to contribute to an improved knowledge of the marine carbon cycle, in this work the prototype of a fluorimeter for quantitative in situ analyses of organic matter in sea water has been developed and tested in laboratory and field experiments. Test results obtained during the M 26/1 Meteor expedition demonstrate the use of continuous multi-channel measurements for the determination of the distribution of phytoplankton and dissolved organic matter even in sea water of high dynamics. As a basis for quantitative fluorescence signal evaluation, spectra of organic substances have been studied. For a classification of algae strains, a catalogue 'optical spectra of algae' is to be compiled in the frame of the present project. (WEN)SIGLEAvailable from TIB Hannover: F94B0764+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Forschung und Technologie (BMFT), Bonn (Germany)DEGerman

Euromar-Mermaid Spektralphotometer Abschlussbericht

Available from TIB Hannover: F96B166+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEBundesministerium fuer Bildung, Wissenschaft, Forschung und Technologie, Bonn (Germany)DEGerman

Entwicklung eines Laserfluorosensors fuer die flugzeuggestuetzte Analyse mariner Schadstoffbelastungen Abschlussbericht

Available from TIB Hannover: FR 4152(Schl)+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman

Untersuchungen zur binauralen Lautstaerkeempfindung

Binaural loudness perception has been studied in sound fields from spacially distributed sound sources. In the loudness comparison tests an artificial diffuse sound field was directly compared with flat sound waves from different directions of incidence. Hearing tests were carried out either with loudspeakers or with the system artificial head/headphone in order to prove the correct direction dependency of the sound loudness. In additional hearing tests, the finger pulse amplitude of the test persons were measured by reveal physiological differences caused by the variation of the direction of incidence of two test sounds. Research results demonstrate the direction dependency of the loudness perception. (WEN)Available from TIB Hannover: D.Dt.F.QN1(11,46)+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEBundesministerium fuer Forschung und Technologie (BMFT), Bonn (Germany)DEGerman

Veroeffentlichungen zum Forschungs- und Entwicklungsvorhaben: Aufbau, Weiterentwicklung und Demonstration von Messstationen mit photovoltaischer Energieversorgung

The research programme of the TUeV Rheinland contains synopses on the BINE project information service (energy supply); 1993 photovoltaic status report; 10th photovoltaic solar energy conference; WLB (water, air, and soil) 6/89; energetically self-sufficient environmental monitoring stations. (HW)Das Forschungsprogramm des TUeV Rheinland enthaelt Uebersichten: 1. BINE Projekt Info-Service (Energieversorgung); 2. Statusreport 1993 photovoltaik; 3. 10"t"h photovoltaic solar energy conference; 4. WLB Wasser, Luft und Boden 6/89 Energiestarke Umweltmessstation. (HW)SIGLEAvailable from TIB Hannover: F94B0389+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Forschung und Technologie (BMFT), Bonn (Germany)DEGerman

Modellierung des Leistungsverhaltens von Windparks Abschlussbericht

Ziel des Projektes ist die messtechnische Erfassung und Modellierung der windrichtungs- und windgeschwindigkeitsabhaengigen Abschattungseffekte in Windparks. Dabei wurden sowohl die Leistungscharakteristik (10-Minuten-Mittelwerte) als auch die kurzzeitigen Fluktuationen (Einsekundenmittelwerte) der Parkausgangsleistung untersucht. Dazu wurden sowohl Messungen der Windgeschwindigkeit in der Nachlaufstroemung einer einzelnen Turbine als auch Messungen der Ausgangsleistung der einzelnen Turbinen von Windparks durchgefuehrt. Auf Basis dieser Messungen wurden vorhandene Modelle der Nachlaufstroemung ueberprueft und verbessert bzw. angepasst werden. Die Modelle wurden in einem Computerprogramm implementiert, das zur Berechnung der Reduktion des Energieertrags durch Abschattungseffekte in Windparks geeignet ist. Auf Basis dieser Modelle wurde ein Verfahren und ein Computerprogramm zur Optimierung der Aufstellungsgeometrie von Windparks entwickelt. Dieses Optimierungsverfahren ist in der Lage, als zusaetzliche Randbedingung die Einhaltung von akustischen Grenzwerten in der Umgebung des optimierten Parks zu gewaehrleisten. (orig.)Aim of this project is measuring and modelling wake effects in wind farms depending on wind speed and direction. The characteristics of the mean power output (10-minute averages) was investigated as well as short time power fluctuations (1-second averages). Measurements of wind speed in the wake flow of a single turbine as well as measurements of power output of wind farms were performed. On the basis of these measurements, already known wake models were tested, tuned, and improved. On the base of these models, a computer program for calculating the power output reduction due to wake effects was implemented. On base of these calculations, a methods and computer software was developed in order to do an optimization of the geometrical arrangement of wind farms. This optimization method is able to take into account limitations for the acoustic impact in the surroundings of the optimized wind farm. (orig.)SIGLEAvailable from TIB Hannover: F96B425+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Bildung, Wissenschaft, Forschung und Technologie, Bonn (Germany)DEGerman

JGOFS-Indik. Teilprojekt 2: Messung und Modellierung bio-optischer Prozesse im Indischen Ozean Abschlussbericht

SIGLEAvailable from TIB Hannover: DtF QN1(75,18) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Bildung, Wissenschaft, Forschung und Technologie, Bonn (Germany)DEGerman