TY  - JOUR
A1  - Kirstein, Simon
A1  - Müller, Karsten
A1  - Walecki-Mingers, Mark
A1  - Deserno, Thomas M.
T1  - Robust adaptive flow line detection in sewer pipes
JF  - Automation in construction
N2  - As part of a novel approach to automatic sewer inspection, this paper presents a robust algorithm for automatic flow line detection. A large image repository is obtained from about 50,000 m sewers to represent the high variability of real world sewer systems. Automatic image processing combines Canny edge detection, Hough transform for straight lines and cost minimization using Dijkstra's shortest path algorithm. Assuming that flow lines are mostly smoothly connected horizontal structures, piecewise flow line delineation is reduced to a process of selecting adjacent line candidates. Costs are derived from the gap between adjacent candidates and their reliability. A single parameter α enables simple control of the algorithm. The detected flow line may precisely follow the segmented edges (α = 0.0) or minimize gaps at joints (α = 1.0). Both, manual and ground truth-based analysis indicate that α = 0.8 is optimal and independent of the sewer's material. The algorithm forms an essential step to further automation of sewer inspection.
Y1  - 2012
U6  - https://doi.org/10.1016/j.autcon.2011.05.009
SN  - 1872-7891 (E-Journal) ; 0926-5805 (Print)
IS  - 21
SP  - 24
EP  - 31
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Miyamoto, K.
A1  - Kuwabara, Yohei
A1  - Kanoh, Shin'ichiro
A1  - Yoshinobu, Tatsuo
A1  - Wagner, Torsten
A1  - Schöning, Michael Josef
T1  - Chemical image scanner based on FDM-LAPS
JF  - Sensors and Actuators B: Chemical. 137 (2009), H. 2
Y1  - 2009
SN  - 0925-4005
SP  - 533
EP  - 538
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Mang, Thomas
A1  - Hodenius, M. A. J.
A1  - Schmitz-Rode, T.
A1  - Baumann, M.
T1  - Absorption of 10-hydroxycamptothecin into the coat of magnetoliposomes / Hodenius, M. A. J. ; Schmitz-Rode, T. ; Baumann, M. ; Ivoanova, G. ; Wong, J. E. ; Mang, T. ; Haulena, F. ; Soenen, S. J. H. ; De Cuyper, M.
JF  - Colloids and Surfaces A: Physicochemical and Engineering Aspects. 343 (2009), H. 1-3
Y1  - 2009
SN  - 0927-7757
N1  - Colloid and Surface Science for Nanotechnology
SP  - 20
EP  - 23
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Schwarzer, Klemens
A1  - da Silva, Vieira E.
A1  - Hoffschmidt, Bernhard
A1  - Schwarzer, T.
T1  - A new solar desalination system with heat recovery for decentralised drinking water production
JF  - Desalination. 248 (2009), H. 1-3
Y1  - 2009
SN  - 0011-9164
N1  - Water and Sanitation in International Development and Disaster Relief (WSIDDR) International Workshop Edinburgh, Scotland, UK, 28–30 May 2008
SP  - 204
EP  - 211
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Bohrn, U.
A1  - Stütz, E.
A1  - Fuchs, K.
A1  - Fleischer, M.
A1  - Schöning, Michael Josef
A1  - Wagner, P.
T1  - Monitoring of irritant gas using a whole-cell-based sensor system
JF  - Sensors and Actuators B: Chemical
N2  - Cell-based sensors for the detection of gases have long been underrepresented, due to the cellular requirement of being cultured in a liquid environment. In this work we established a cell-based gas biosensor for the detection of toxic substances in air, by adapting a commercial sensor chip (Bionas®), previously used for the measurement of pollutants in liquids. Cells of the respiratory tract (A549, RPMI 2650, V79), which survive at a gas phase in a natural context, are used as biological receptors. The physiological cell parameters acidification, respiration and morphology are continuously monitored in parallel. Ammonia was used as a highly water-soluble model gas to test the feasibility of the sensor system. Infrared measurements confirmed the sufficiency of the medium draining method. This sensor system provides a basis for many sensor applications such as environmental monitoring, building technology and public security.
Y1  - 2012
U6  - https://doi.org/10.1016/j.snb.2012.05.088
SN  - 0925-4005
VL  - 175
SP  - 208
EP  - 217
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Hüning, Felix
A1  - Leineweber, A.
A1  - Jacobs, H.
A1  - Lueken, H.
T1  - ε-Fe3N: magnetic structure, magnetization and temperature dependent disorder of nitrogen / Leineweber, A. ; Jacobs, H. ; Hüning, F. ; Lueken, H. ; Schilder, H. ; Kockelmann, W.
JF  - Journal of Alloys and Compounds. 288 (1999), H. 1-2
N2  - ε-Fe3N has been investigated by time-of-flight neutron diffraction (temperature range 4.2–618 K) and SQUID magnetometry (2–700 K, B≤5 T). A ferromagnetic spin structure is observed with magnetic moments oriented perpendicular to the c-axis of the hexagonal nuclear structure. The magnetic saturation moment of iron is 2.2 μB at 4.2 K from neutron diffraction and 2.0 μB from magnetic measurements and decreases in a Brillouin-like manner on heating to TC=575 K. Above 450 K an increasing but reversible disorder of the nitrogen partial structure is observed.
Y1  - 1999
SN  - 1873-4669
VL  - 288
IS  - 1-2
SP  - 79
EP  - 87
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Pressler, Axel
A1  - Esefeld, Katrin
A1  - Scherr, Johannes
A1  - Ali, Mohammad
A1  - Hanssen, Henner
A1  - Kotliar, Konstantin
A1  - Lanzl, Ines
A1  - Halle, Martin
A1  - Kaemmerer, Harald
A1  - Schmidt-Trucksäss, Arno
A1  - Hager, Alfred
T1  - Structural alterations of retinal arterioles in adults late after repair of aortic isthmic coarctation
JF  - The American Journal of Cardiology
N2  - Patients after coarctation repair still have an increased risk of cardiovascular or cerebrovascular events. This has been explained by the persisting hypertension and alterations in the peripheral vessels. However, involvement of the central vessels such as the retinal arteries is virtually unknown. A total of 34 patients after coarctation repair (22 men and 12 women; 23 to 58 years old, age range 0 to 32 years at surgical repair) and 34 nonhypertensive controls underwent structural and functional retinal vessel analysis. Using structural analysis, the vessel diameters were measured. Using functional analysis, the endothelium-dependent vessel dilation in response to flicker light stimulation was assessed. In the patients after coarctation repair, the retinal arteriolar diameter was significantly reduced compared to that of the controls (median 182 μm, first to third quartile 171 to 197; vs 197 μm, first to third quartile 193 to 206; p <0.001). These findings were independent of the peripheral blood pressure and age at intervention. No differences were found for venules. The functional analysis findings were not different between the patients and controls (maximum dilation 3.5%, first to third quartile 2.1% to 4.5% vs 3.6%, first to third quartile 2.2% to 4.3%; p = 0.81), indicating preserved autoregulative mechanisms. In conclusion, the retinal artery diameter is reduced in patients after coarctation repair, independent of their current blood pressure level and age at intervention. As a structural marker of chronic vessel damage associated with past, current, or future hypertension, retinal arteriolar narrowing has been linked to stroke incidence. These results indicate an involvement of cerebral microcirculation in aortic coarctation, despite timely repair, and might contribute to explain the increased rate of cerebrovascular events in such patients.
Y1  - 2010
U6  - https://doi.org/10.1016/j.amjcard.2009.10.070
SN  - 0002-9149
VL  - 105
IS  - 5
SP  - 740
EP  - 744
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Kotliar, Konstantin
A1  - Lanzl, Ines M.
A1  - Schmidt-Trucksäss, A.
A1  - Sitnikova, Diana
A1  - Ali, Mohammad
A1  - Blume, Katharina
A1  - Halle, Martin
A1  - Hansser, Henner
T1  - Dynamic retinal vessel response to flicker in obesity: A methodological approach
JF  - Microvascular Research
Y1  - 2011
SN  - 0026-2862
VL  - 81
IS  - 1
SP  - 123
EP  - 128
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Hanssen, H.
A1  - Nickel, T.
A1  - Drexel, V.
A1  - Hertel, G.
A1  - Emslander, I.
A1  - Sisic, Z.
A1  - Lorang, D.
A1  - Schuster, T.
A1  - Kotliar, Konstantin
A1  - Pressler, A.
A1  - Schmidt-Trucksäss, A.
A1  - Weis, M.
A1  - Halle, M.
T1  - Exercise-induced alterations of retinal vessel diameters and cardiovascular risk reduction in obesity
JF  - Atherosclerosis
Y1  - 2011
SN  - 0021-9150
VL  - 216
IS  - 2
SP  - 433
EP  - 439
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Itabashi, Akinori
A1  - Kosaka, Naoki
A1  - Miyamoto, Ko-ichiro
A1  - Wagner, Torsten
A1  - Schöning, Michael Josef
T1  - High-speed chemical imaging system based on front-side-illuminated LAPS
JF  - Sensors and actuators B: Chemical
N2  - The chemical imaging sensor is a semiconductor-based chemical sensor that can visualize the spatial distribution of specific ions on the sensing surface. The conventional chemical imaging system based on the light-addressable potentiometric sensor (LAPS), however, required a long time to obtain a chemical image, due to the slow mechanical scan of a single light beam. For high-speed imaging, a plurality of light beams modulated at different frequencies can be employed to measure the ion concentrations simultaneously at different locations on the sensor plate by frequency division multiplex (FDM). However, the conventional measurement geometry of back-side illumination limited the bandwidth of the modulation frequency required for FDM measurement, because of the low-pass filtering characteristics of carrier diffusion in the Si substrate. In this study, a high-speed chemical imaging system based on front-side-illuminated LAPS was developed, which achieved high-speed spatiotemporal recording of pH change at a rate of 70 frames per second.
Y1  - 2013
U6  - https://doi.org/10.1016/j.snb.2013.03.016
SN  - 1873-3077
VL  - 182
SP  - 315
EP  - 321
PB  - Elsevier
CY  - Amsterdam
ER  -