TY  - JOUR
A1  - Kleefeld, Andreas
A1  - Reißel, Martin
T1  - The Levenberg–Marquardt method applied to a parameter estimation problem arising from electrical resistivity tomography
JF  - Applied Mathematics and Computation
Y1  - 2011
SN  - 0096-3003
VL  - 217
IS  - 9
SP  - 4490
EP  - 4501
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - CHAP
A1  - Weber, S.
A1  - Terstegge, Andreas
A1  - Engels, R.
A1  - Herzog, H.
A1  - Reinartz, R.
A1  - Reinhart, P.
A1  - Rongen, F.
A1  - Müller-Gärtner, H. W.
A1  - Halling, H.
T1  - The KFA TierPET: performance characteristics and measurements
T2  - Conference record / 1996 IEEE Nuclear Science Symposium [and Medical Imaging], November 2 - 9, 1996, Anaheim, California ; vol. 2
Y1  - 1996
SN  - 0-7803-3534-1
SN  - 1082-3654
SP  - 1117
EP  - 1119
PB  - IEEE
CY  - Piscataway, NJ
ER  - 
TY  - JOUR
A1  - Harris, Isaac
A1  - Kleefeld, Andreas
T1  - The inverse scattering problem for a conductive boundary condition and transmission eigenvalues
JF  - Applicable Analysis
N2  - In this paper, we consider the inverse scattering problem associated with an inhomogeneous media with a conductive boundary. In particular, we are interested in two problems that arise from this inverse problem: the inverse conductivity problem and the corresponding interior transmission eigenvalue problem. The inverse conductivity problem is to recover the conductive boundary parameter from the measured scattering data. We prove that the measured scatted data uniquely determine the conductivity parameter as well as describe a direct algorithm to recover the conductivity. The interior transmission eigenvalue problem is an eigenvalue problem associated with the inverse scattering of such materials. We investigate the convergence of the eigenvalues as the conductivity parameter tends to zero as well as prove existence and discreteness for the case of an absorbing media. Lastly, several numerical and analytical results support the theory and we show that the inside–outside duality method can be used to reconstruct the interior conductive eigenvalues.
KW  - Transmission eigenvalues
KW  - Conductive boundary condition
KW  - Inverse scattering
Y1  - 2018
U6  - https://doi.org/10.1080/00036811.2018.1504028
SN  - 1563-504X
VL  - 99
IS  - 3
SP  - 508
EP  - 529
PB  - Taylor & Francis
CY  - London
ER  - 
TY  - JOUR
A1  - Behbahani, Mehdi
A1  - Probst, M.
A1  - Mai, A.
A1  - Tran, L.
A1  - Vonderstein, K.
A1  - Keschenau, P.
A1  - Linde, T.
A1  - Steinseifer, U.
A1  - Behr, M.
A1  - Mottaghy, K.
T1  - The influence of high shear on thrombosis and hemolysis in artificial organs
JF  - Artificial Organs
Y1  - 2010
SN  - 0391-3988
N1  - Special Issue: SI ; Meeting abstract
VL  - 33
IS  - 7
SP  - 426
EP  - 426
ER  - 
TY  - JOUR
A1  - Ermelenko, Y.
A1  - Yoshinobu, T.
A1  - Mourzina, Y.
A1  - Schöning, Michael Josef
A1  - Vlasov, Y.
A1  - Iwasaki, H.
T1  - The hybrid K+/Ca2+ sensor based on laser scanned silicon transducer for multi-component analysis
JF  - Proceedings of ICAS 2001, IUPAC [3rd] International Congress on Analytical Sciences 2001 : August 6 - 10, 2001, Waseda University, Tokyo
Y1  - 2002
N1  - International Congress on Analytical Sciences <2001, Tokyo> ; International Union of Pure and Applied Chemistry. Pure and applied chemistry ; 73,10. ; Analytical sciences ; 17.2001, special issue
SP  - i777
EP  - i780
PB  - Japan Society for Analytical Chemistry
CY  - Tokyo
ER  - 
TY  - JOUR
A1  - Kleefeld, Andreas
T1  - The hot spots conjecture can be false: some numerical examples
JF  - Advances in Computational Mathematics
N2  - The hot spots conjecture is only known to be true for special geometries. This paper shows numerically that the hot spots conjecture can fail to be true for easy to construct bounded domains with one hole. The underlying eigenvalue problem for the Laplace equation with Neumann boundary condition is solved with boundary integral equations yielding a non-linear eigenvalue problem. Its discretization via the boundary element collocation method in combination with the algorithm by Beyn yields highly accurate results both for the first non-zero eigenvalue and its corresponding eigenfunction which is due to superconvergence. Additionally, it can be shown numerically that the ratio between the maximal/minimal value inside the domain and its maximal/minimal value on the boundary can be larger than 1 + 10− 3. Finally, numerical examples for easy to construct domains with up to five holes are provided which fail the hot spots conjecture as well.
KW  - Numerics
KW  - Boundary integral equations
KW  - Potential theory
KW  - Helmholtz equation
KW  - Interior Neumann eigenvalues
Y1  - 2021
U6  - https://doi.org/10.1007/s10444-021-09911-5
SN  - 1019-7168
VL  - 47
PB  - Springer
CY  - Dordrecht
ER  - 
TY  - JOUR
A1  - Laack, Walter van
T1  - The genetic code should be seen as a positioning code
JF  - British journal of arts and social sciences. Vol. 14 (2013), No. 1
Y1  - 2013
SN  - 2046-9578
SP  - 93
EP  - 97
ER  - 
TY  - JOUR
A1  - Riemer, A.
A1  - Schroth, P.
A1  - Schütz, S.
A1  - Hummel, Hans E.
A1  - Lüth, H.
A1  - Kohl, C.-D.
A1  - Schöning, Michael Josef
T1  - The future of fire detection: Biological sensors? – Die Zukunft der Brandgassensorik: Biologische Sensoren?
JF  - Gassensorik in der Brandmeldetechnik : [VdS-Fachtagung, am 15. und 16. November 2000 in Köln] = Gas sensors for fire detection / VdS Schadenverhütung
Y1  - 2000
N1  - Fachtagung Gassensorik in der Brandmeldetechnik ; (2000, Köln)
SP  - 1
EP  - 7
PB  - VdS Schadenverhütung
CY  - Köln
ER  - 
TY  - JOUR
A1  - Digel, Ilya
A1  - Temiz Artmann, Aysegül
T1  - The emperor's new body : seeking for a blueprint of limb regeneration in humans
JF  - Stem cell engineering : principles and applications / Gerhard M. Artmann ... eds.
Y1  - 2011
SN  - 978-3-642-11864-7
SP  - 3
EP  - 37
PB  - Springer
CY  - Berlin [u.a.]
ER  - 
TY  - JOUR
A1  - Temiz Artmann, Aysegül
A1  - Cavdar, C.
A1  - Yenicerioglu, Y.
A1  - Caliskan, S.
T1  - The effects of intravenous iron treatment on oxidant stress and erythrocyte deformability in haemodialysis patients. Cavdar, C.; Temiz, A.; Yenicerioglu, Y.; Caliskan, S.; Celik, A.; Sifil, A.; Onvural, B.; Camsari, T.
JF  - Scandinavian Journal of Urology and Nephrology. 37 (2003), H. 1
Y1  - 2003
SN  - 0036-5599
SP  - 77
EP  - 82
ER  -