@inproceedings{BruessermannDeuster2005, author = {Br{\"u}ssermann, Klaus and Deuster, M.}, title = {Temperature measurement to optimise the burning process}, year = {2005}, abstract = {One of the most important parameters in a burning chamber - in power stations, in waste to energy plants - is the temperature. This temperature is in the range of 700-1500 °C - one of the most advanced measuring methods being the acoustic pyrometry with the possibility of producing temperature mapping in one level of the burning chamber - comparable to computer tomography. The results of these measurements discussed in the presentation can be used - to fulfil the legal requirements in the FRG or in the EU - to equalise the temperature in one level of the burning chamber to optimise the steam production (better efficiency of the plant) and to minimise the production of temperature controlled flue gas components (NO, CO a. o.) - to control the SNCR-process if used.}, subject = {Pyrometrie}, language = {en} } @inproceedings{Gebhardt2006, author = {Gebhardt, Andreas}, title = {Technology Diffusion through a Multi-Level Technology Transfer Infrastructure. Contribution to the 1st. All Africa Technology Diffusion Conference Boksburg, South Africa June 12th - 14th 2006}, year = {2006}, abstract = {Table of contents 1. Introduction 2. Multi-level Technology Transfer Infrastructure 2.1 Level 1: University Education - Encourage the Idea of becoming an Entrepreneur 2.2 Level 2: Post Graduate Education - Improve your skills and focus it on a product family. 2.3 Level 3: Birth of a Company - Focus your skills on a product and a market segment. 2.4 Level 4: Ready to stand alone - Set up your own business 2.5 Level 5: Grow to be Strong - Develop your business 2.6 Level 6: Competitive and independent - Stay innovative. 3. Samples 3.1 Sample 1: Laser Processing and Consulting Centre, LBBZ 3.2 Sample 2: Prototyping Centre, CP 4. Funding - Waste money or even lost Money? 5. Conclusion}, subject = {Technologietransfer}, language = {en} } @article{Gebhardt2006, author = {Gebhardt, Andreas}, title = {Generative Manufacturing of Ceramic Parts "Vision Rapid Prototyping"}, year = {2006}, abstract = {Table of Contents Introduction 1. Generative Manufacturing Processes 2. Classification of Generative Manufacturing Processes 3. Application of Generative Processes on the Fabrication of Ceramic Parts 3.1 Extrusion 3.2 3D-Printing 3.3 Sintering - Laser Sintering 3.4 Layer-Laminate Processes 3.5 Stereolithography (sometimes written: Stereo Lithography) 4. Layer Milling 5. Conclusion - Vision}, subject = {Rapid prototyping}, language = {en} } @misc{Staat2006, author = {Staat, Manfred}, title = {Engineering Mechanics. Lecture Notes. 2nd edition, translation of the 3rd corrected and extended German edition of "Technische Mechanik"}, year = {2006}, abstract = {English translation of the corrected lectures notes of Sebastian Kr{\"a}mer. Contents 0 Introduction to Mechanics 1 Statics of Rigid Bodies 2 Elastostatics (Strength of Materials) 3 Kinematics 4 Kinetics Literature}, subject = {Technische Mechanik}, language = {en} } @misc{StaatBarry2006, author = {Staat, Manfred and Barry, Steve}, title = {Continuum Mechanics with an Introduction to the Finite Element Method / Steve Barry; Manfred Staat. With extensions by Manfred Staat.}, year = {2006}, abstract = {Contents: 1 Introduction 2 One Dimensional Continuum Mechanics 3 Tensors 4 Three Dimensional Stress and Strain 5 Conservation Laws 6 Contiunuum Modelling 7 Plain Problems 8 Questions 9 Reference Information}, subject = {Technische Mechanik}, language = {en} } @techreport{Wessling2009, type = {Working Paper}, author = {Weßling, Matthias}, title = {How to deal with foreign cultures: an cross-cultural training-approach based on the didactical methodology of 'experiential learning' following Kolb \& Fry}, year = {2009}, abstract = {Many companies still conduct the worldwide management of people as if neither the external economic nor the internal structure of the firm had changed. The costs of cross-cultural failure, for individuals and their companies, are enormous: personal and family costs; financial, professional and emotional costs; costs to one's career prospects, to one's self-esteem, to one's marriage and family. This scenario describes sufficiently the reason for learning "the art of crossing cultures" (Craig Storti). To this end, this research paper describes an innovative approach of cross-cultural training, following the didactical ideas of Kolb and Fry, the so-called 'experiential learning'.}, subject = {Interkulturelles Lernen}, language = {en} } @inproceedings{Staat2006, author = {Staat, Manfred}, title = {Problems and chances for probabilistic fracture mechanics in the analysis of steel pressure boundary reliability. - {\"U}berarb. Ausg.}, year = {2006}, abstract = {In: Technical feasibility and reliability of passive safety systems for nuclear power plants. Proceedings of an Advisory Group Meeting held in J{\"u}lich, 21-24 November 1994. - Vienna , 1996. - Seite: 43 - 55 IAEA-TECDOC-920 Abstract: It is shown that the difficulty for probabilistic fracture mechanics (PFM) is the general problem of the high reliability of a small population. There is no way around the problem as yet. Therefore what PFM can contribute to the reliability of steel pressure boundaries is demon­strated with the example of a typical reactor pressure vessel and critically discussed. Although no method is distinguishable that could give exact failure probabilities, PFM has several addi­tional chances. Upper limits for failure probability may be obtained together with trends for design and operating conditions. Further, PFM can identify the most sensitive parameters, improved control of which would increase reliability. Thus PFM should play a vital role in the analysis of steel pressure boundaries despite all shortcomings.}, subject = {Bruchmechanik}, language = {en} } @article{KaemperPicardBrilletal.2003, author = {K{\"a}mper, Klaus-Peter and Picard, Antoni and Brill, Manfred and Cassel, Detlev and Jentsch, Andreas and Merten, Sabine and Rollwa, Markus}, title = {The Virtual Clean Room - a new tool in teaching MST process technologies}, year = {2003}, abstract = {The Virtual Clean Room - a new tool in teaching MST process technologies University education in high-technology fields like MST is not complete without intensive laboratory sessions. Students cannot fully grasp the complexity and the special problems related to the manufacturing of microsystems without a thorough hands-on experience in a MST clean room.}, subject = {Virtuelle Maschine}, language = {en} } @article{Staat2001, author = {Staat, Manfred}, title = {Cyclic plastic deformation tests to verify FEM-based shakedown analyses}, year = {2001}, abstract = {Fatigue analyses are conducted with the aim of verifying that thermal ratcheting is limited. To this end it is important to make a clear distintion between the shakedown range and the ratcheting range (continuing deformation). As part of an EU-supported research project, experiments were carried out using a 4-bar model. The experiment comprised a water-cooled internal tube, and three insulated heatable outer test bars. The system was subjected to alternating axial forces, superimposed with alternating temperatures at the outer bars. The test parameters were partly selected on the basis of previous shakedown analyses. During the test, temperatures and strains were measured as a function of time. The loads and the resulting stresses were confirmed on an ongoing basis during performance of the test, and after it. Different material models were applied for this incremental elasto-plastic analysis using the ANSYS program. The results of the simulation are used to verify the FEM-based shakedown analysis.}, subject = {Materialerm{\"u}dung}, language = {en} } @article{Staat2005, author = {Staat, Manfred}, title = {Local and global collapse pressure of longitudinally flawed pipes and cylindrical vessels}, year = {2005}, abstract = {Limit loads can be calculated with the finite element method (FEM) for any component, defect geometry, and loading. FEM suggests that published long crack limit formulae for axial defects under-estimate the burst pressure for internal surface defects in thick pipes while limit loads are not conservative for deep cracks and for pressure loaded crack-faces. Very deep cracks have a residual strength, which is modelled by a global collapse load. These observations are combined to derive new analytical local and global collapse loads. The global collapse loads are close to FEM limit analyses for all crack dimensions.}, subject = {Finite-Elemente-Methode}, language = {en} } @article{Staat2005, author = {Staat, Manfred}, title = {Direct finite element route for design-by-analysis of pressure components}, year = {2005}, abstract = {In the new European standard for unfired pressure vessels, EN 13445-3, there are two approaches for carrying out a Design-by-Analysis that cover both the stress categorization method (Annex C) and the direct route method (Annex B) for a check against global plastic deformation and against progressive plastic deformation. This paper presents the direct route in the language of limit and shakedown analysis. This approach leads to an optimization problem. Its solution with Finite Element Analysis is demonstrated for mechanical and thermal actions. One observation from the examples is that the so-called 3f (3Sm) criterion fails to be a reliable check against progressive plastic deformation. Precise conditions are given, which greatly restrict the applicability of the 3f criterion.}, subject = {Einspielen }, language = {en} } @article{Staat2003, author = {Staat, Manfred}, title = {Shakedown and ratchetting under tension-torsion loadings: analysis and experiments}, year = {2003}, abstract = {Structural design analyses are conducted with the aim of verifying the exclusion of ratchetting. To this end it is important to make a clear distinction between the shakedown range and the ratchetting range. The performed experiment comprised a hollow tension specimen which was subjected to alternating axial forces, superimposed with constant moments. First, a series of uniaxial tests has been carried out in order to calibrate a bounded kinematic hardening rule. The load parameters have been selected on the basis of previous shakedown analyses with the PERMAS code using a kinematic hardening material model. It is shown that this shakedown analysis gives reasonable agreement between the experimental and the numerical results. A linear and a nonlinear kinematic hardening model of two-surface plasticity are compared in material shakedown analysis.}, subject = {Einspielen }, language = {en} } @article{Staat2000, author = {Staat, Manfred}, title = {Basis Reduction for the Shakedown Problem for Bounded Kinematic Hardening Material}, year = {2000}, abstract = {Limit and shakedown analysis are effective methods for assessing the load carrying capacity of a given structure. The elasto-plastic behavior of the structure subjected to loads varying in a given load domain is characterized by the shakedown load factor, defined as the maximum factor which satisfies the sufficient conditions stated in the corresponding static shakedown theorem. The finite element dicretization of the problem may lead to very large convex optimization. For the effective solution a basis reduction method has been developed that makes use of the special problem structure for perfectly plastic material. The paper proposes a modified basis reduction method for direct application to the two-surface plasticity model of bounded kinematic hardening material. The considered numerical examples show an enlargement of the load carrying capacity due to bounded hardening.}, subject = {Finite-Elemente-Methode}, language = {en} } @inproceedings{Staat2003, author = {Staat, Manfred}, title = {Design by Analysis of Pressure Components by non-linear Optimization}, year = {2003}, abstract = {This paper presents the direct route to Design by Analysis (DBA) of the new European pressure vessel standard in the language of limit and shakedown analysis (LISA). This approach leads to an optimization problem. Its solution with Finite Element Analysis is demonstrated for some examples from the DBA-Manual. One observation from the examples is, that the optimisation approach gives reliable and close lower bound solutions leading to simple and optimised design decision.}, language = {en} } @article{Staat2001, author = {Staat, Manfred}, title = {LISA - a European project for FEM-based limit and shakedown analysis}, year = {2001}, abstract = {The load-carrying capacity or the safety against plastic limit states are the central questions in the design of structures and passive components in the apparatus engineering. A precise answer is most simply given by limit and shakedown analysis. These methods can be based on static and kinematic theorems for lower and upper bound analysis. Both may be formulated as optimization problems for finite element discretizations of structures. The problems of large-scale analysis and the extension towards realistic material modelling will be solved in a European research project. Limit and shakedown analyses are briefly demonstrated with illustrative examples.}, subject = {Einspielen }, language = {en} } @inproceedings{Fabo2004, author = {Fabo, Sabine}, title = {Audio-visual hybrids : between immersion and detachment}, year = {2004}, abstract = {Close interrelations between sound and image are not a mere phenomenon of today's multimedia technology. The idea of the synthesis of different media lies at the core of the concept of the Gesamtkunstwerk in the second half of the 19th century and it can also be traced back to the synaesthesia debate at the beginning of the 20th century [...].}, subject = {Elektronische Kunst}, language = {en} } @inproceedings{PoghossianSchumacherKloocketal.2006, author = {Poghossian, Arshak and Schumacher, Kerstin and Kloock, Joachim P. and Rosenkranz, Christian and Schultze, Joachim W. and M{\"u}ller-Veggian, Mattea and Sch{\"o}ning, Michael Josef}, title = {Functional testing and characterisation of ISFETs on wafer level by means of a micro-droplet cell}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:a96-opus-1259}, year = {2006}, abstract = {A wafer-level functionality testing and characterisation system for ISFETs (ionsensitive field-effect transistor) is realised by means of integration of a specifically designed capillary electrochemical micro-droplet cell into a commercial wafer prober-station. The developed system allows the identification and selection of "good" ISFETs at the earliest stage and to avoid expensive bonding, encapsulation and packaging processes for nonfunctioning ISFETs and thus, to decrease costs, which are wasted for bad dies. The developed system is also feasible for wafer-level characterisation of ISFETs in terms of sensitivity, hysteresis and response time. Additionally, the system might be also utilised for wafer-level testing of further electrochemical sensors.}, subject = {Biosensor}, language = {en} } @inproceedings{WagnerSchoening2006, author = {Wagner, Torsten and Sch{\"o}ning, Michael Josef}, title = {Preface of the Special Issue of I3S 2005 in J{\"u}lich (Germany)}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:a96-opus-1365}, year = {2006}, abstract = {International Symposium on Sensor Science, I3S 2005 <3; 2005; Juelich, Germany> In: Sensors 2006, 6, 260-261 ISSN 1424-8220}, subject = {Biosensor}, language = {en} } @inproceedings{SrivastavaSinghDhandetal.2006, author = {Srivastava, Alok and Singh, Virendra and Dhand, Chetna and Kaur, Manindar and Singh, Tejvir and Witte, Katrin and Scherer, Ulrich W.}, title = {Study of swift heavy ion modified conduction polymer composites for application as gas sensor}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:a96-opus-1345}, year = {2006}, abstract = {A polyaniline-based conducting composite was prepared by oxidative polymerisation of aniline in a polyvinylchloride (PVC) matrix. The coherent free standing thin films of the composite were prepared by a solution casting method. The polyvinyl chloride-polyaniline composites exposed to 120 MeV ions of silicon with total ion fluence ranging from 1011 to 1013 ions/cm2, were observed to be more sensitive towards ammonia gas than the unirradiated composite. The response time of the irradiated composites was observed to be comparably shorter. We report for the first time the application of swift heavy ion modified insulating polymer conducting polymer (IPCP) composites for sensing of ammonia gas.}, subject = {Biosensor}, language = {en} } @inproceedings{ChaiybounTrauteKiesewetteretal.2006, author = {Chaiyboun, Ali and Traute, R{\"u}diger and Kiesewetter, Olaf and Ahlers, Simon and M{\"u}ller, Gerhard and Doll, Theodor}, title = {Modular analytical multicomponent analysis in gas sensor arrays}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:a96-opus-1358}, year = {2006}, abstract = {A multi-sensor system is a chemical sensor system which quantitatively and qualitatively records gases with a combination of cross-sensitive gas sensor arrays and pattern recognition software. This paper addresses the issue of data analysis for identification of gases in a gas sensor array. We introduce a software tool for gas sensor array configuration and simulation. It concerns thereby about a modular software package for the acquisition of data of different sensors. A signal evaluation algorithm referred to as matrix method was used specifically for the software tool. This matrix method computes the gas concentrations from the signals of a sensor array. The software tool was used for the simulation of an array of five sensors to determine gas concentration of CH4, NH3, H2, CO and C2H5OH. The results of the present simulated sensor array indicate that the software tool is capable of the following: (a) identify a gas independently of its concentration; (b) estimate the concentration of the gas, even if the system was not previously exposed to this concentration; (c) tell when a gas concentration exceeds a certain value. A gas sensor data base was build for the configuration of the software. With the data base one can create, generate and manage scenarios and source files for the simulation. With the gas sensor data base and the simulation software an on-line Web-based version was developed, with which the user can configure and simulate sensor arrays on-line.}, subject = {Biosensor}, language = {en} } @inproceedings{SakthivelWeppner2006, author = {Sakthivel, Mariappan and Weppner, Werner}, title = {Response behaviour of a hydrogen sensor based on ionic conducting polymer-metal interfaces prepared by the chemical reduction method}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:a96-opus-1399}, year = {2006}, abstract = {A solid-state amperometric hydrogen sensor based on a protonated Nafion membrane and catalytic active electrode operating at room temperature was fabricated and tested. Ionic conducting polymer-metal electrode interfaces were prepared chemically by using the impregnation-reduction method. The polymer membrane was impregnated with tetra-ammine platinum chloride hydrate and the metal ions were subsequently reduced by using either sodium tetrahydroborate or potassium tetrahydroborate. The hydrogen sensing characteristics with air as reference gas is reported. The sensors were capable of detecting hydrogen concentrations from 10 ppm to 10\% in nitrogen. The response time was in the range of 10-30 s and a stable linear current output was observed. The thin Pt films were characterized by XRD, Infrared Spectroscopy, Optical Microscopy, Atomic Force Microscopy, Scanning Electron Microscopy and EDAX.}, subject = {Biosensor}, language = {en} } @inproceedings{KoplinSiemonsOcenValentinetal.2006, author = {Koplin, Tobias J. and Siemons, Maike and Oc{\´e}n-Val{\´e}ntin, C{\´e}sar and Sanders, Daniel and Simon, Ulrich}, title = {Workflow for high throughput screening of gas sensing materials}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:a96-opus-1407}, year = {2006}, abstract = {The workflow of a high throughput screening setup for the rapid identification of new and improved sensor materials is presented. The polyol method was applied to prepare nanoparticular metal oxides as base materials, which were functionalised by surface doping. Using multi-electrode substrates and high throughput impedance spectroscopy (HT-IS) a wide range of materials could be screened in a short time. Applying HT-IS in search of new selective gas sensing materials a NO2-tolerant NO sensing material with reduced sensitivities towards other test gases was identified based on iridium doped zinc oxide. Analogous behaviour was observed for iridium doped indium oxide.}, subject = {Biosensor}, language = {en} } @inproceedings{SpannhakeSchulzHelwigetal.2006, author = {Spannhake, Jan and Schulz, Olaf and Helwig, Andreas and Krenkow, Angelika and M{\"u}ller, Gerhard and Doll, Theodor}, title = {High-temperature MEMS heater platforms: long-term performance of metal and semiconductor heater materials}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:a96-opus-1513}, year = {2006}, abstract = {Micromachined thermal heater platforms offer low electrical power consumption and high modulation speed, i.e. properties which are advantageous for realizing nondispersive infrared (NDIR) gas- and liquid monitoring systems. In this paper, we report on investigations on silicon-on-insulator (SOI) based infrared (IR) emitter devices heated by employing different kinds of metallic and semiconductor heater materials. Our results clearly reveal the superior high-temperature performance of semiconductor over metallic heater materials. Long-term stable emitter operation in the vicinity of 1300 K could be attained using heavily antimony-doped tin dioxide (SnO2:Sb) heater elements.}, subject = {Biosensor}, language = {en} } @inproceedings{KatzWillner2006, author = {Katz, Eugenii and Willner, Itamar}, title = {Magneto-controlled quantized electron transfer to surface-confined redox units and metal nanoparticles}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:a96-opus-1528}, year = {2006}, abstract = {Hydrophobic magnetic nanoparticles (NPs) consisting of undecanoate-capped magnetite (Fe3O4, average diameter ca. 5 nm) are used to control quantized electron transfer to surface-confined redox units and metal NPs. A two-phase system consisting of an aqueous electrolyte solution and a toluene phase that includes the suspended undecanoatecapped magnetic NPs is used to control the interfacial properties of the electrode surface. The attracted magnetic NPs form a hydrophobic layer on the electrode surface resulting in the change of the mechanisms of the surface-confined electrochemical processes. A quinone-monolayer modified Au electrode demonstrates an aqueous-type of the electrochemical process (2e-+2H+ redox mechanism) for the quinone units in the absence of the hydrophobic magnetic NPs, while the attraction of the magnetic NPs to the surface results in the stepwise single-electron transfer mechanism characteristic of a dry nonaqueous medium. Also, the attraction of the hydrophobic magnetic NPs to the Au electrode surface modified with Au NPs (ca. 1.4 nm) yields a microenvironment with a low dielectric constant that results in the single-electron quantum charging of the Au NPs.}, subject = {Biosensor}, language = {en} } @inproceedings{PijanowskaRemiszewska2006, author = {Pijanowska, Dorota G. and Remiszewska, Elzbieta}, title = {pH-based detection of phenylalnine by potentiometric and colorimetric methods}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:a96-opus-1536}, year = {2006}, abstract = {In this paper, methods of sample preparation for potentiometric measurement of phenylalanine are presented. Basing on the spectrophotometric measurements of phenylalanine, the concentrations of reagents of the enzymatic reaction (10 mM L-Phe, 0,4 mM NAD+, 2U L-PheDH) were determined. Then, the absorption spectrum of the reaction product, NADH, was monitored (maximum peak at 340 nm). The results obtained by the spectrophotometric method were compared with the results obtained by the colourimetry, using pH indicators. The above-mentioned two methods will be used as references for potentiometric measurements of phenylalanine concentration.}, subject = {Biosensor}, language = {en} } @inproceedings{AridaKloockSchoening2006, author = {Arida, Hassan A. and Kloock, Joachim P. and Sch{\"o}ning, Michael Josef}, title = {Novel organic membrane-based thin-film microsensors for the determination of heavy metal cations}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:a96-opus-1545}, year = {2006}, abstract = {A first step towards the fabrication and electrochemical evaluation of thin-film microsensors based on organic PVC membranes for the determination of Hg(II), Cd(II), Pb(II) and Cu(II) ions in solutions has been realised. The membrane-coating mixture used in the preparation of this new type of microsensors is incorporating PVC as supporting matrix, o-nitrophenyloctylether (o-NPOE) as solvent mediator and a recently synthesized Hg[dimethylglyoxime(phene)]2+ and Bis-(4-hydroxyacetophenone)-ethylenediamine as electroactive materials for Hg(II) and Cd(II), respectively. A set of three commercialised ionophores for Cd(II), Pb(II) and Cu(II) has been also used for comparison. Thin-film microsensors based on these membranes showed a Nernstian response of slope (26-30 mV/dec.) for the respective tested cations. The potentiometric response characteristics (linear range, pH range, detection limit and response time) are comparable with those obtained by conventional membranes as well as coated wire electrodes prepared from the same membrane. The realisation of the new organic membrane-based thin-film microsensors overcomes the problem of an insufficient selectivity of solid-state-based thinfilm sensors.}, subject = {Biosensor}, language = {en} } @inproceedings{BarekFischerNavratiletal.2006, author = {Barek, Jiri and Fischer, Jan and Navratil, Tomas and Peckova, Karolina and Yosypchuk, Bogdan}, title = {Silver solid amalgam electrodes as sensors for chemical carcinogens}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:a96-opus-1554}, year = {2006}, abstract = {The applicability of differential pulse voltammetry (DPV) and adsorptive stripping voltammetry (AdSV) at a non-toxic meniscus-modified silver solid amalgam electrode (m-AgSAE) for the determination of trace amounts of genotoxic substances was demonstrated on the determination of micromolar and submicromolar concentrations of 3-nitrofluoranthene using methanol - 0.01 mol L-1 NaOH (9:1) mixture as a base electrolyte and of Ostazine Orange using 0.01 mol L-1 NaOH as a base electrolyte.}, subject = {Biosensor}, language = {en} } @inproceedings{BaronasIvanauskasKulys2006, author = {Baronas, Romas and Ivanauskas, Feliksas and Kulys, Juozas}, title = {Mathematical modeling of biosensors based on an array of enzyme microreactors}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:a96-opus-1569}, year = {2006}, abstract = {This paper presents a two-dimensional-in-space mathematical model of biosensors based on an array of enzyme microreactors immobilised on a single electrode. The modeling system acts under amperometric conditions. The microreactors were modeled by particles and by strips. The model is based on the diffusion equations containing a nonlinear term related to the Michaelis-Menten kinetics of the enzymatic reaction. The model involves three regions: an array of enzyme microreactors where enzyme reaction as well as mass transport by diffusion takes place, a diffusion limiting region where only the diffusion takes place, and a convective region, where the analyte concentration is maintained constant. Using computer simulation, the influence of the geometry of the microreactors and of the diffusion region on the biosensor response was investigated. The digital simulation was carried out using the finite difference technique.}, subject = {Biosensor}, language = {en} } @inproceedings{LeiMulchandaniChenetal.2006, author = {Lei, Yu and Mulchandani, Priti and Chen, Wilfred and Mulchandani, Ashok}, title = {Biosensor for direct determination of fenitrothion and EPN using recombinant Pseudomonas putida JS444 with surface expressed organophosphorus hydrolase. 1. modified clark oxygen electrode}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:a96-opus-1573}, year = {2006}, abstract = {This paper reports a first microbial biosensor for rapid and cost-effective determination of organophosphorus pesticides fenitrothion and EPN. The biosensor consisted of recombinant PNP-degrading/oxidizing bacteria Pseudomonas putida JS444 anchoring and displaying organophosphorus hydrolase (OPH) on its cell surface as biological sensing element and a dissolved oxygen electrode as the transducer. Surfaceexpressed OPH catalyzed the hydrolysis of fenitrothion and EPN to release 3-methyl-4-nitrophenol and p-nitrophenol, respectively, which were oxidized by the enzymatic machinery of Pseudomonas putida JS444 to carbon dioxide while consuming oxygen, which was measured and correlated to the concentration of organophosphates. Under the optimum operating conditions, the biosensor was able to measure as low as 277 ppb of fenitrothion and 1.6 ppm of EPN without interference from phenolic compounds and other commonly used pesticides such as carbamate pesticides, triazine herbicides and organophosphate pesticides without nitrophenyl substituent. The applicability of the biosensor to lake water was also demonstrated.}, subject = {Biosensor}, language = {en} } @inproceedings{NaetherJuarezEmmerichetal.2006, author = {N{\"a}ther, Niko and Ju{\´a}rez, Leon M. and Emmerich, R{\"u}diger and Berger, J{\"o}rg and Friedrich, Peter and Sch{\"o}ning, Michael Josef}, title = {Detection of hydrogen peroxide (H2O2) at exposed temperatures for industrial processes}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:a96-opus-1418}, year = {2006}, abstract = {An H2O2 sensor for the application in industrial sterilisation processes has been developed. Therefore, automated sterilisation equipment at laboratory scale has been constructed using parts from industrial sterilisation facilities. In addition, a software tool has been developed for the control of the sterilisation equipment at laboratory scale. First measurements with the developed sensor set-up as part of the sterilisation equipment have been performed and the sensor has been physically characterised by optical microscopy and SEM.}, subject = {Biosensor}, language = {en} } @inproceedings{WagnerKohlFroebaetal.2006, author = {Wagner, Thorsten and Kohl, Claus-Dieter and Fr{\"o}ba, Michael and Tiemann, Michael}, title = {Gas sensing properties of ordered mesoporous SnO2}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:a96-opus-1422}, year = {2006}, abstract = {We report on the synthesis and CO gas-sensing properties of mesoporous tin(IV) oxides (SnO2). For the synthesis cetyltrimethylammonium bromide (CTABr) was used as a structure-directing agent; the resulting SnO2 powders were applied as films to commercially available sensor substrates by drop coating. Nitrogen physisorption shows specific surface areas up to 160 m2·g-1 and mean pore diameters of about 4 nm, as verified by TEM. The film conductance was measured in dependence on the CO concentration in humid synthetic air at a constant temperature of 300 °C. The sensors show a high sensitivity at low CO concentrations and turn out to be largely insensitive towards changes in the relative humidity. We compare the materials with commercially available SnO2-based sensors.}, subject = {Biosensor}, language = {en} } @inproceedings{MirmohseniRostamizadeh2006, author = {Mirmohseni, Abdolreza and Rostamizadeh, Kobra}, title = {Quartz crystal nanobalance in conjunction with principal component analysis for identification of volatile organic compounds}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:a96-opus-1434}, year = {2006}, abstract = {Quartz crystal nanobalance (QCN) sensors are considered as powerful masssensitive sensors to determine materials in the sub-nanogram level. In this study, a single piezoelectric quartz crystal nanobalance modified with polystyrene was employed to detect benzene, toluene, ethylbenzene and xylene (BTEX compounds). The frequency shift of the QCN sensor was found to be linear against the BTEX compound concentrations in the range about 1-45 mg l-1. The correlation coefficients for benzene, toluene, ethylbenzene, and xylene were 0.991, 0.9977, 0.9946 and 0.9971, respectively. The principal component analysis was also utilized to process the frequency response data of the single piezoelectric crystal at different times, considering to the different adsorption-desorption dynamics of BTEX compounds. Using principal component analysis, it was found that over 90\% of the data variance could still be explained by use of two principal components (PC1 and PC2). Subsequently, the successful identification of benzene and toluene was possible through the principal component analysis of the transient responses of the polystyrene modified QCN sensor. The results showed that the polystyrene-modified QCN had favorable identification and quantification performances for the BTEX compounds.}, subject = {Biosensor}, language = {en} } @inproceedings{KreutzLoergenGraeweetal.2006, author = {Kreutz, Christian and L{\"o}rgen, J{\"u}rgen and Graewe, Boris and Bargon, Joachim and Yoshida, Mayumi and Freso, Zachary M. and Fr{\`e}chet, Jean M. J.}, title = {High frequency quartz micro balances: a promising path to enhanced sensitivity of gravimetric sensors}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:a96-opus-1445}, year = {2006}, abstract = {An array of 50 MHz quartz microbalances (QMBs) coated with a dendronized polymer was used to detect small amounts of volatile organic compounds (VOCs) in the gas phase. The results were compared to those obtained with the commonly used 10 MHz QMBs. The 50 MHz QMBs proved to be a powerful tool for the detection of VOCs in the gas phase; therefore, they represent a promising alternative to the much more delicate surface acoustic wave devices (SAWs).}, subject = {Biosensor}, language = {en} } @inproceedings{RabnerShacham2006, author = {Rabner, Arthur and Shacham, Yosi}, title = {A concept for a sensitive micro total analysis system for high throughput fluorescence imaging}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:a96-opus-1456}, year = {2006}, abstract = {This paper discusses possible methods for on-chip fluorescent imaging for integrated bio-sensors. The integration of optical and electro-optical accessories, according to suggested methods, can improve the performance of fluorescence imaging. It can boost the signal to background ratio by a few orders of magnitudes in comparison to conventional discrete setups. The methods that are present in this paper are oriented towards building reproducible arrays for high-throughput micro total analysis systems (µTAS). The first method relates to side illumination of the fluorescent material placed into microcompartments of the lab-on-chip. Its significance is in high utilization of excitation energy for low concentration of fluorescent material. The utilization of a transparent µLED chip, for the second method, allows the placement of the excitation light sources on the same optical axis with emission detector, such that the excitation and emission rays are directed controversly. The third method presents a spatial filtering of the excitation background.}, subject = {Biosensor}, language = {en} } @inproceedings{FoersterStockMontanarietal.2006, author = {F{\"o}rster, Arnold and Stock, J{\"u}rgen and Montanari, Simone and Lepsa, Mihail Ion and L{\"u}th, Hans}, title = {Fabrication and characterisation of GaAs Gunn Diode Chips for applications at 77 GHz in automotive industry}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:a96-opus-1462}, year = {2006}, abstract = {GaAs-based Gunn diodes with graded AlGaAs hot electron injector heterostructures have been developed under the special needs in automotive applications. The fabrication of the Gunn diode chips was based on total substrate removal and processing of integrated Au heat sinks. Especially, the thermal and RF behavior of the diodes have been analyzed by DC, impedance and S-parameter measurements. The electrical investigations have revealed the functionality of the hot electron injector. An optimized layer structure could fulfill the requirements in adaptive cruise control (ACC) systems at 77 GHz with typical output power between 50 and 90 mW.}, subject = {Biosensor}, language = {en} } @inproceedings{PlatenPoghossianSchoening2006, author = {Platen, Johannes and Poghossian, Arshak and Sch{\"o}ning, Michael Josef}, title = {Microstructured Nanostructures - nanostructuring by means of conventional photolithography and layer-expansion technique}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:a96-opus-1477}, year = {2006}, abstract = {A new and simple method for nanostructuring using conventional photolithography and layer expansion or pattern-size reduction technique is presented, which can further be applied for the fabrication of different nanostructures and nano-devices. The method is based on the conversion of a photolithographically patterned metal layer to a metal-oxide mask with improved pattern-size resolution using thermal oxidation. With this technique, the pattern size can be scaled down to several nanometer dimensions. The proposed method is experimentally demonstrated by preparing nanostructures with different configurations and layouts, like circles, rectangles, trapezoids, "fluidic-channel"-, "cantilever"- and meander-type structures.}, subject = {Biosensor}, language = {en} } @inproceedings{PijanowskaRemiszewskaPederzollietal.2006, author = {Pijanowska, Dorota G. and Remiszewska, Elzbieta and Pederzolli, Cecilia and Lunelli, Lorenzo and Vendano, Michele and Canteri, Roberto and Dudzinski, Konrad and Kruk, Jerzy and Torbicz, Wladyslaw}, title = {Surface modification for microreactor fabrication}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:a96-opus-1480}, year = {2006}, abstract = {In this paper, methods of surface modification of different supports, i.e. glass and polymeric beads for enzyme immobilisation are described. The developed method of enzyme immobilisation is based on Schiff's base formation between the amino groups on the enzyme surface and the aldehyde groups on the chemically modified surface of the supports. The surface of silicon modified by APTS and GOPS with immobilised enzyme was characterised by atomic force microscopy (AFM), time-of-flight secondary ion mass spectroscopy (ToF-SIMS) and infrared spectroscopy (FTIR). The supports with immobilised enzyme (urease) were also tested in combination with microreactors fabricated in silicon and Perspex, operating in a flow-through system. For microreactors filled with urease immobilised on glass beads (Sigma) and on polymeric beads (PAN), a very high and stable signal (pH change) was obtained. The developed method of urease immobilisation can be stated to be very effective.}, subject = {Biosensor}, language = {en} } @inproceedings{BukhariYang2006, author = {Bukhari, Syed Faisal Ahmed and Yang, Wuqiang}, title = {Multi-interface level sensors and new development in monitoring and control of oil separators}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:a96-opus-1498}, year = {2006}, abstract = {In the oil industry, huge saving may be made if suitable multi-interface level measurement systems are employed for effectively monitoring crude oil separators and efficient control of their operation. A number of techniques, e.g. externally mounted displacers, differential pressure transmitters and capacitance rod devices, have been developed to measure the separation process with gas, oil, water and other components. Because of the unavailability of suitable multi-interface level measurement systems, oil separators are currently operated by the trial-and-error approach. In this paper some conventional techniques, which have been used for level measurement in industry, and new development are discussed.}, subject = {Biosensor}, language = {en} } @inproceedings{TymeckiGlabKoncki2006, author = {Tymecki, Lukasz and Glab, Stanislaw and Koncki, Robert}, title = {Miniaturized, planar ion-selective electrodes fabricated by means of thick-film technology}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:a96-opus-1506}, year = {2006}, abstract = {Various planar technologies are employed for developing solid-state sensors having low cost, small size and high reproducibility; thin- and thick-film technologies are most suitable for such productions. Screen-printing is especially suitable due to its simplicity, low-cost, high reproducibility and efficiency in large-scale production. This technology enables the deposition of a thick layer and allows precise pattern control. Moreover, this is a highly economic technology, saving large amounts of the used inks. In the course of repetitions of the film-deposition procedure there is no waste of material due to additivity of this thick-film technology. Finally, the thick films can be easily and quickly deposited on inexpensive substrates. In this contribution, thick-film ion-selective electrodes based on ionophores as well as crystalline ion-selective materials dedicated for potentiometric measurements are demonstrated. Analytical parameters of these sensors are comparable with those reported for conventional potentiometric electrodes. All mentioned thick-film strip electrodes have been totally fabricated in only one, fully automated thickfilm technology, without any additional manual, chemical or electrochemical steps. In all cases simple, inexpensive, commercially available materials, i.e. flexible, plastic substrates and easily cured polymer-based pastes were used.}, subject = {Biosensor}, language = {en} } @inproceedings{Bruessermann2005, author = {Br{\"u}ssermann, Klaus}, title = {Platform of Excellence in "Energy and Environment"}, year = {2005}, abstract = {The Ministry of Science and Research in North Rhine-Westphalia created eight platforms of excellence, one in the research area „Energy and Environment" in 2002 at ACUAS. This platform concentrates the research and development of 13 professors in J{\"u}lich and Aachen and of two scientific institutes with different topics: - NOWUM-Energy with emphasis on efficient and economic energy conversion - The Solar Institute J{\"u}lich - SIJ - being the largest research institute in the field of renewables at a University of Applied Sciences in Germany With this platform each possible energy conversion - nuclear, fossil, renewable- can be dealt with to help solving the two most important problems of mankind, energy and potable water. At the CSE are presented the historical development, some research results and the combined master studies in „Energy Systems" and „Nuclear Applications"}, subject = {Energietechnik}, language = {en} } @book{Schuermann1983, author = {Sch{\"u}rmann, Wilhelm}, title = {Song of joy : Kippenberger, Sch{\"u}rmann [Martin Kippenberger - gemalte Bilder ; Wilhelm Sch{\"u}rmann - fotografierte Bilder]}, publisher = {Neue Galerie}, address = {Aachen}, pages = {20 S. : {\"u}berw. Ill.}, year = {1983}, language = {en} } @article{Gebhardt2004, author = {Gebhardt, Andreas}, title = {Rapid Prototyping}, series = {Landolt-B{\"o}rnstein - Group VIII Advanced Materials and Technologies‡Vol. 1 Laser Physics and Applications‡Subvol. C Laser Applications / authors: B{\"a}uerle, D. ...}, journal = {Landolt-B{\"o}rnstein - Group VIII Advanced Materials and Technologies‡Vol. 1 Laser Physics and Applications‡Subvol. C Laser Applications / authors: B{\"a}uerle, D. ...}, publisher = {Heidelberg}, address = {Springer}, isbn = {3-540-00105-0}, pages = {105 -- 123}, year = {2004}, language = {en} } @article{JacobsHermanns1996, author = {Jacobs, Stephan and Hermanns, Oliver}, title = {Cooperative Design: Requirements on Network Technology and Document Architecture}, series = {Selected papers of the 6th Joint European Networking Conference / guest ed.: J. Barber{\´a}}, journal = {Selected papers of the 6th Joint European Networking Conference / guest ed.: J. Barber{\´a}}, publisher = {Elsevier}, address = {Amsterdam [u.a.]}, pages = {S. 428 - 600 : Ill., graph. Darst.}, year = {1996}, language = {en} } @book{JacobsJarke1994, author = {Jacobs, Stephan and Jarke, Matthias}, title = {Requirements information management : the NATURE approach / RWTH Aachen, Fachgruppe Informatik. M. Jarke}, publisher = {RWTH, Fachgruppe Informatik}, address = {Aachen}, pages = {27 S : graph. Darst.}, year = {1994}, language = {en} } @article{JacobsJarkePohl1994, author = {Jacobs, Stephan and Jarke, Matthias and Pohl, Klaus}, title = {Requirements Engineering 1993}, series = {Automated software engineering : the international journal of automated reasoning and artificial intelligence in software engineering. Vol. 1 (1994), H. No. 1}, journal = {Automated software engineering : the international journal of automated reasoning and artificial intelligence in software engineering. Vol. 1 (1994), H. No. 1}, isbn = {0928-8910}, year = {1994}, language = {en} } @article{JacobsGrobKethers1994, author = {Jacobs, Stephan and Grob, Robert and Kethers, Stefanie}, title = {Towards CIS in Quality Management - Integration of Agents and Methods / Robert Grob, Stephan Jacobs, Stefanie Kethers}, series = {Proceedings of the Second International Conference on Cooperative Information Systems : May 17 - 20, 1994, Toronto, Canada / sponsored by the University of Toronto. Editors: Michael Brodie}, journal = {Proceedings of the Second International Conference on Cooperative Information Systems : May 17 - 20, 1994, Toronto, Canada / sponsored by the University of Toronto. Editors: Michael Brodie}, publisher = {University of Toronto Press}, address = {Toronto}, year = {1994}, language = {en} } @article{Jacobs1994, author = {Jacobs, Stephan}, title = {A Fault Diagnosis System Using Temporary Relations between Symptoms}, series = {Operations research '93 : extended abstracts of the 18th Symposium on Operations Research held at the University of Cologne, September 1 - 3, 1993 / Achim Bachem ... (ed.)}, journal = {Operations research '93 : extended abstracts of the 18th Symposium on Operations Research held at the University of Cologne, September 1 - 3, 1993 / Achim Bachem ... (ed.)}, publisher = {Physica-Verl.}, address = {Heidelberg}, isbn = {379080794X}, pages = {XXVI, 550 S : graph. Darst.}, year = {1994}, language = {en} } @article{JacobsJarkePohletal.1993, author = {Jacobs, Stephan and Jarke, Matthias and Pohl, Klaus and Bubenko, Janis}, title = {Requirements Engineering : An Integrated View of Representations, Process, and Domain / Jarke, Matthias ; Pohl, Klaus ; Jacobs, Stephan ; Bubenko, Janis ...}, series = {Software engineering : 4th European Software Engineering Conference Garmisch-Partenkirchen, Germany, September 13 - 17, 1993 ; proceedings / ESEC '93. Ian Sommerville ... (eds.)}, journal = {Software engineering : 4th European Software Engineering Conference Garmisch-Partenkirchen, Germany, September 13 - 17, 1993 ; proceedings / ESEC '93. Ian Sommerville ... (eds.)}, publisher = {Springer}, address = {Berlin [u.a.]}, isbn = {3-540-57209-0}, pages = {100 -- 114}, year = {1993}, language = {en} } @article{JacobsQuernheimAghadavoodiJolfaei1991, author = {Jacobs, Stephan and Quernheim, Ulrich and Aghadavoodi Jolfaei, Masoud}, title = {Performance Evalutation of three Access Protocols for VSAT Networks / Ulrich Quernheim, Stephan Jacobs, Masoud Aghadavoodi Jolfaei}, series = {Proceedings of the second European Conference on Satellite Communications : ECSC-2 ; Palais de Congr{\`e}s, Li{\`e}ge, Belgium, 22 - 24 October 1991 / [ed.: Brigitte Kaldeich]}, journal = {Proceedings of the second European Conference on Satellite Communications : ECSC-2 ; Palais de Congr{\`e}s, Li{\`e}ge, Belgium, 22 - 24 October 1991 / [ed.: Brigitte Kaldeich]}, publisher = {ESA Publ. Div.}, address = {Noordwijk}, isbn = {92-9092-170-6}, pages = {XXXII, 533 S. : Ill., graph. Darst.}, year = {1991}, language = {en} } @article{JacobsQuernheim1990, author = {Jacobs, Stephan and Quernheim, Ulrich}, title = {ARQ Error Control for Multipoint Satellite Communications / Ulrich Quernheim, Stephan Jacobs}, series = {Computer networking : proceedings of the IFIP TC 6 Conference on Computer Networking, COMNET '90, Budapest, Hungary, 8-10 May, 1990 / edited by L{\´a}szl{\´o} Csaba, Tibor Szentiv{\´a}nyi, Katie Tarnay}, journal = {Computer networking : proceedings of the IFIP TC 6 Conference on Computer Networking, COMNET '90, Budapest, Hungary, 8-10 May, 1990 / edited by L{\´a}szl{\´o} Csaba, Tibor Szentiv{\´a}nyi, Katie Tarnay}, publisher = {Elsevier}, address = {New York, N.Y.}, isbn = {0444888721}, pages = {xi, 505 p : ill}, year = {1990}, language = {en} }