R. Helbig

The Spectral Distribution of the Intrinsic Radiative Recombination in Silicon. (9999)

Ruff, M., Fick, M., Lindner, R., Roessler, U., Helbig, R.

Microscopic calculations of the intrinsic radiative recombination probability B(omega,T) of Si have been performed to obtain the absolute values of the spectral distribution and of its temperature...

Gewebe- und gewirkeverstärkter Aluminiumschaum für Leichtbaukonstruktionen (2009)

Seeger, M., Helbig, R., Hohlfeld, J., Lies, C.

In der Praxis sind immer wieder neue Leichtbau-Werkstoffe gefordert. Dazu gehören Aluminiumschäume mit geringem spezifischen Gewicht und hoher Steifigkeit. Der Maschinenbau verwendet z. B:...

Gewebe- und gewirkeverstärkter Al-Schaum für Leichtbaukonstruktionen (2008)

Seeger, M., Helbig, R., Lies, C., Hohlfeld, J.

Die Sandwichbauweise sowie deren Vorzüge sind bekannt und werden mittlerweile auch in Form von Aluminiumschaum-Stahl-Verbunden realisiert. Gerade diese Verbunde sind außerordentlich steif und...

Analysis of N-acetylglucosamine metabolism in the marine bacterium Pirellula sp strain 1 by a proteomic approach (2002)

Rabus, R., Gade, D., Helbig, R., Bauer, M., Glöckner, F. O., Kube, M., ...

Pirellula sp. strain 1 is a marine bacterium that can grow with the chitin monomer N-acetylglucosamine as sole source of carbon and nitrogen under aerobic conditions, and that is a member of the...

Infrared absorption spectra of 4 H silicon carbide (2001)

Chen, C. Q., Helbig, R., Engelbrecht, F., Zeman, J.

Zeeman effect of D1 bound exciton in 4H-SiC (2001)

Chen, C. Q., Helbig, R., Winkler, R., Wysmołek, A., Potemski, M.

Zeeman spectroscopy of shallow nitrogen donor in 3 C-SiC (2001)

Chen, C. Q., Helbig, R., Zeman, J., Poulter, A. J. L.

Photothermal ionization spectroscopy of shallow nitrogen donor states in 4H-SiC (2000)

Chen, C. Q., Zeman, J., Engelbrecht, F., Peppermüller, C., Helbig, R., Chen, Z. H., ...

Shallow nitrogen donor states in 4H-SiC investigated by photothermal ionization spectroscopy (2000)

Chen, C. Q., Zeman, J., Engelbrecht, F., Peppermüller, C., Helbig, R., Martinez, G.

Indirect-coupling ultraviolet-sensitive photodetector with high electrical gain, fast-response, and low-noise (2000)

Qian, F., Schnupp, R., Chen, C.Q., Helbig, R., Ryssel, H.

Pressure dependence of the band gap of 4H-SiC. (1999)

Zeman, J., Engelbrecht, F., Wellenhofer, G., Peppermüller, C., Helbig, R., Martinez, G., ...

Piezoelectric Properties and Elastic Constants of 4H and 6H SiC at Temperatures 4-320 K. (1998)

Karmann, S., Helbig, R., Stein, R. A.

4H and 6H silicon carbide crystals are piezoelectric and can be excited to resonant vibrations with quality factors up to Q =100,000 and an electromechanical coupling factor of k(sub 31) =0.03 for 6H...

OPTICAL ABSORPTION OF GALLIUM-DOPED SILICON. (1998)

Hell, W., Helbig, R., Schulz, M. J.

PIEZOELECTRIC PROPERTIES AND ELASTIC CONSTANTS OF 4H AND 6H SILICON CARBIDE AT TEMPERATURES 4-320 K. (1998)

Karmann, S., Helbig, R., Stein, R. A.

Last author is with Siemans Research Laboratories, Erlangen, W. Germany.

Modell zum Testen von Medikamenten unter flugähnlichen Bedingungen am Beispiel eines Antihypertensivums (1998)

Wolfram, G., Baisch, F., Helbig, R., Breuer-Rölke, A., Gerzer, R., Drummer, C.

Pressure dependence of the electronic band gap in 6H-SiC (1996)

Engelbrecht, F., Zeman, J., Wellenhofer, G., Peppermüller, C., Helbig, R., Martinez, G., ...

Photoluminescence experiments on 6H-SiC doped with nitrogen have been performed at low temperature (T = (29 ± 2) K) under hydrostatic pressure up to 5 GPa. The pressure coefficients of the S0, R0,...

Computer Based Learning - Dealing with Increasing Knowledge Volume and Declining Teaching Resources

Birch, Colin J., Rickert, Kenwyn G., Schiefer, G., Helbig, R., Rickert, U.

Expanding knowledge in all disciplines, declining resources and staff for traditional lecture and practical or tutorial format in Australian Universities, and demands for knowledge construction and...