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Keywords
IT Products are viewed and managed differently depending on the perspectives and the stage within the life cycle. A model is presented that integrates different perspectives and stages serving as an aid for the analysis of business models and focused positioning of IT-products. Four generic business models are analysed with regard to the product management function in general and the positioning field for IT-products specifically: off-the-shelf (license), license plus service, project, and system service (incl. cloud computing).
The semiconductor field-effect platform represents a powerful tool for detecting the adsorption and binding of charged macromolecules with direct electrical readout. In this work, a capacitive electrolyte–insulator–semiconductor (EIS) field-effect sensor consisting of an Al-p-Si-SiO2 structure has been applied for real-time in situ electrical monitoring of the layer-by-layer formation of polyelectrolyte (PE) multilayers (PEM). The PEMs were deposited directly onto the SiO2 surface without any precursor layer or drying procedures. Anionic poly(sodium 4-styrene sulfonate) and cationic weak polyelectrolyte poly(allylamine hydrochloride) have been chosen as a model system. The effect of the ionic strength of the solution, polyelectrolyte concentration, number and polarity of the PE layers on the characteristics of the PEM-modified EIS sensors have been studied by means of capacitance–voltage and constant-capacitance methods. In addition, the thickness, surface morphology, roughness and wettabilityof the PE mono- and multilayers have been characterised by ellipsometry, atomic force microscopy and water contact-angle methods, respectively. To explain potential oscillations on the gate surface and signal behaviour of the capacitive field-effect EIS sensor modified with a PEM, a simplified electrostatic model that takes into account the reduced electrostatic screening of PE charges by mobile ions within the PEM has been proposed and discussed.
Many biped robots deploy a form of gait that follows the zero moment point (ZMP) approach, that is, the robot is in a stable position at any point in time. This requires the robot to be fully actuated. While very stable, the draw-backs of this approach are a fairly slow gait and high energy consumption. An alternative approach is the so-called passive-dynamic walking, where the gait makes use of the inertia and dynamic stability of the robot. In this paper we describe our ongoing work of combining the principles of passive-dynamic walking on the fully-actuated biped robot Nao, which is also deployed for robotic soccer applications. We present a simple controller that allows the robot to stably rock sidewards, showing a closed limit-cycle. We discuss first results of superimposing a forward motion on the sidewards motion. Based on this we expect to endow the Nao with a fast, robust, and stable passive-dynamic walk on the fully-actuated Nao in the future.
Size unlimited markerless deletions by a transconjugative plasmid-system in Bacillus licheniformis
(2013)
In this work, a multi-sensor chip for the investigation of the sensing properties of different types of metal oxides towards hydrogen peroxide in the ppm range is presented. The fabrication process and physical characterization of the multi-sensor chip are described. Pure SnO2 and WO3 as well as Pd- and Pt-doped SnO2 films are characterized in terms of their sensitivity to H2O2. The sensing films have been prepared by drop-coating of water-dispensed nano-powders. A physical characterization, including scanning electron microscopy and X-ray diffraction analysis of the deposited metal-oxide films, was done. From the measurements in hydrogen peroxide atmosphere, it could be shown, that all of the tested metal oxide films are suitable for the detection of H2O2 in the ppm range. The highest sensitivity and reproducibility was achieved using Pt-doped SnO2.
Calibration plot of a SnO2, WO3, Pt-, and Pd-doped SnO2 gas sensor for H2O2 concentrations in the ppm range.
Seismic excited liquid filled tanks are subjected to extreme loading due to hydrodynamic pressures, which can lead to nonlinear stability failure of the thinwalled cylindrical tanks, as it is known from past earthquakes. A significant reduction of the seismically induced loads can be obtained by the application of base isolation systems, which have to be designed carefully with respect to the modified hydrodynamic behaviour of the tank in interaction with the liquid. For this reason a highly sophisticated fluid-structure interaction model has to be applied for a realistic simulation of the overall dynamic system. In the following, such a model is presented and compared with the results of simplified mathematical models for rigidly supported tanks. Finally, it is examined to what extent a simple mechanical model can represent the behaviour of a base isolated tank in case of seismic excitation
Die Fahrzeugkarosserie bildet als größte funktionale und organisatorische Systemeinheit ein zentrales Kompetenzfeld der OEMs. Für den Fahrzeughersteller stellt der Karosserierohbau eine hohe Kernkompetenz sowohl in der Produktentwicklung als auch in der Produktion dar. Neue, innovative Karosseriebauweisen, bspw. aufgrund eines neuen Fahrzeugkonzeptes oder neuer Anforderungen, bedeuten für den OEM auch gleichzeitig die intensive Auseinandersetzung mit Kompetenzfokussierung bzw. Wertschöpfungsverlagerungen.
Euler-based induced drag estimation for highly non-planar lifting systems during conceptional design
(2013)
Impedance spectroscopy: A tool for real-time in situ monitoring of the degradation of biopolymers
(2013)
Investigation of the degradation kinetics of biodegradable polymers is essential for the development of implantable biomedical devices with predicted biodegradability. In this work, an impedimetric sensor has been applied for real-time and in situ monitoring of degradation processes of biopolymers. The sensor consists of two platinum thin-film electrodes covered by a polymer film to be studied. The benchmark biomedical polymer poly(D,L-lactic acid) (PDLLA) was used as a model system. PDLLA films were deposited on the sensor structure from a polymer solution by using the spin-coating method. The degradation kinetics of PDLLA films have been studied in alkaline solutions of pH 9 and 12 by means of an impedance spectroscopy (IS) method. Any changes in a polymer capacitance/resistance induced by water uptake and/or polymer degradation will modulate the global impedance of the polymer-covered sensor that can be used as an indicator of the polymer degradation. The degradation rate can be evaluated from the time-dependent impedance spectra. As expected, a faster degradation has been observed for PDLLA films exposed to pH 12 solution.
Wing weight estimation methodology for highly non-planar lifting systems during conceptual design
(2013)
Unsere unternehmerische Umwelt befindet sich in einem zunehmend dynamischen Wandel. Dies führt dazu, dass Herausforderungen, denen sich Unternehmen stellen müssen, immer komplexer werden. Hier gilt es zunehmend, eine Balance zwischen verschiedenen Spannungsfeldern zu erreichen. Sogenannte Megatrends stellen die Treiber dieses Wandels dar. Als Megatrend werden nach dem Zukunftsinstitut (2010a) richtungsweisende Veränderungstendenzen aufgefasst, die alle Bereiche des Lebens sowohl individuell als auch gesellschaftlich beeinflussen und langfristige Auswirkungen haben.
The concept of an injective affine embedding of the quantum states into a set of classical states, i.e., into the set of the probability measures on some measurable space, as well as its relation to statistically complete observables is revisited, and its limitation in view of a classical reformulation of the statistical scheme of quantum mechanics is discussed. In particular, on the basis of a theorem concerning a non-denseness property of a set of coexistent effects, it is shown that an injective classical embedding of the quantum states cannot be supplemented by an at least approximate classical description of the quantum mechanical effects. As an alternative approach, the concept of quasi-probability representations of quantum mechanics is considered.
Commercial materials with polyvinylpolypyrrolidone and polymeric amberlites (XAD7HP, XAD16) are commonly used for the adsorptive downstream processing of polyphenols from renewable resources. In this study, beta-zeolite-based adsorbent systems were examined, and their properties were compared to organic resins. Batch adsorption experiments were conducted with synthetic solutions of major polyphenols. Adsorption isotherms and desorption characteristics of individual adsorbent were determined based on these results. Maximum adsorption capacities were calculated using the Langmuir model. For example, the zeolites had capacities up to 203.2 mg/g for ferulic acid. To extend these results to a complex system, additional experiments were performed on rapeseed meal and wheat seed extracts as representative renewable resources. HPLC analysis showed that with 7.5% w/v, which is regarded as the optimum amount of zeolites, zeolites A and B could bind 100% of the major polyphenols as well as release polyphenols at high yields. Additionally, regeneration experiments were performed with isopropyl alcohol at 99°C to evaluate how zeolites regenerate under mild conditions. The results showed only a negligible loss of adsorption capacity and no loss of desorption capacity. In summary, it was concluded that beta-zeolites were promising adsorbents for developing new processes to isolate polyphenols from renewable resources.
Biotechnological downstream processing is usually an elaborate procedure, requiring a multitude of unit operations to isolate the target component. Besides the disadvantageous space-time yield, the risks of cross-contaminations and product loss grow fast with the complexity of the isolation procedure. A significant reduction of unit operations can be achieved by application of magnetic particles, especially if these are functionalized with affinity ligands. As magnetic susceptible materials are highly uncommon in biotechnological processes, target binding and selective separation of such particles from fermentation or reactions broths can be done in a single step. Since the magnetizable particles can be produced from iron salts and low priced polymers, a single-use implementation of these systems is highly conceivable. In this article, the principles of magnetizable particles, their synthesis and functionalization are explained. Furthermore, applications in the area of reaction engineering, microfluidics and downstream processing are discussed focusing on established single-use technologies and development potential.
Formine Metaraum 2 : Workshop 2013 des Moduls Gestalten, FB Architektur der Hochschule Aachen
(2013)
Mass transfer correlation for evaporation–condensation thermal process in the range of 70 °C–95 °C
(2013)
Modeling contribution to risk assessment of thermal production power for geothermal reservoirs
(2013)
The response of Bacillus licheniformis to heat and ethanol stress and the role of the SigB regulon
(2013)
We have developed a double-tuned ¹H/¹⁹F birdcage resonator dedicated for hand and wrist imaging at 7 T to locally image non-steroidal anti-inflammatory drugs (NSAID) such as 2-{[3-(Trifluoromethyl) phenyl]amino}benzoic acid. The preliminary in vivo images acquired by the double-tuned ¹H/¹⁹F birdcage resonator demonstrate the feasibility for ¹H/¹⁹F hand- and wrist-imaging at 7 T. While the diagnostic quality of the coil needs to be assessed in patients with inflammatory rheumatoid disease, first ¹⁹F images of the NSAID are encouraging, and point towards the prospect of applying ¹⁹F-MRI to visualize and quantify the concentration of therapeutically-active compound at the sites of inflammation.
In modernen Fahrzeugkarosserien der Großserie kommen zunehmend Materialmischbauweisen zur Anwendung. In Zusammenarbeit der Daimler AG, der Tower Automotive Holding GmbH, der Imperia GmbH sowie der Partnerunternehmen KSM Castings GmbH und Schaufler Tooling GmbH & Co. KG wird das Leichtbaupotenzial von Aluminiumverbundguss-Stahlblech-Hybriden am Beispiel des vorderen Dachquerträgers des Mercedes-Benz Viano/Vito ausführlich untersucht.
In modernen Fahrzeugkarosserien der Großserie kommen zunehmend Materialmischbauweisen
zur Anwendung. In Zusammenarbeit der Daimler AG, der Tower Automotive Holding
GmbH, der Imperia GmbH sowie der Partnerunternehmen KSM Castings GmbH und Schaufler
Tooling GmbH & Co. KG wird das Leichtbaupotenzial von Stahlblech-AluminiumverbundgussHybriden
am Beispiel des vorderen Dachquerträgers des Mercedes-Benz Viano/Vito ausführlich
untersucht.
Plakatzeichen : Plakate mit Schrift über Schrift ; 50 typografische Plakate ; Kommunikationsdesign
(2013)
Semiconductor-based chemical imaging sensors, like the light-addressable potentiometric sensor (LAPS) or the pH-imaging sensor based on a charge-coupled device (CCD), are becoming a powerful tool for label-free imaging of biological phenomena. We have proposed a polyion-based enzymatic membrane to develop an acetylcholine (ACh) imaging sensor for neural cell-activity observations. In this study, a CCD-type ACh-imaging sensor and a LAPS-type ACh-imaging sensor were fabricated and the prospect of both sensors was clarified by making a comparison of their basic characteristics.
Light-addressable potentiometric sensors (LAPS) are semiconductor-based potentiometric sensors, with the advantage to detect the concentration of a chemical species in a liquid solution above the sensor surface in a spatially resolved manner. The addressing is achieved by a modulated and focused light source illuminating the semiconductor and generating a concentration-depending photocurrent. This work introduces a LAPS set-up that is able to monitor the electrical impedance in addition to the photocurrent. The impedance spectra of a LAPS structure, with and without illumination, as well as the frequency behaviour of the LAPS measurement are investigated. The measurements are supported by electrical equivalent circuits to explain the impedance and the LAPS-frequency behaviour. The work investigates the influence of different parameters on the frequency behaviour of the LAPS. Furthermore, the phase shift of the photocurrent, the influence of the surface potential as well as the changes of the sensor impedance will be discussed.
Erfolgreiches IT-Marketing
(2013)
An application of a scanning light-addressable potentiometric sensor for label-free DNA detection
(2013)
Thema
06 Ein halbes Jahrhundert Zukunft | Der Campus Jülich der FH Aachen wird 50 Jahre alt
09 Ein Scheck fürs Scheckkartenlabor | Staatssekretär Thomas Rachel übergibt Förderbescheid für „Opto-Switch“
10 Datissenpralinschen | Walburga Hüllenkremer bildet Industriemechanikerinnen und -mechaniker aus
11 „Arbeit gibts immer“ | Mit seiner engagierten Art hat Willi Ziesmann viele Menschen beeindruckt
12 Dem Tumor auf der Spur | Über den Einsatz von Radioaktivität in der modernen Medizin
14 Intelligenter Strom | FH Aachen bietet neuen Masterstudiengang Energiewirtschafts-Informatik an Studium
16 Produktwerkstatt | Ein roter Faden für eine ausgezeichnete Lehre
18 Bierkrug auf Knopfdruck | Neue Abbundanlage in Euskirchen steht für Praxisnähe und den Schulterschluss mit der Region
20 Motorisierte Luftkissen | Studenten bauen ein eigenes Hovercraft für die Weltmeisterschaft 2014
22 „Wir kratzen am Weltraum“ | FH-Studierende optimieren Höhenraketen für Experimente in Schwerelosigkeit
24 Goldenes Diplom | Pensionierte Bauingenieure besuchen die FH
26 Wenn Autos miteinander reden | Nachrichtentechnik machts möglich 28 Mehr als Geld | Das Stipendienprogramm bietet eine Win-win-Situation für Unternehmen und Studierende
30 Eine Inselkrone für den Bodensee | FH-Studenten gewinnen zweiten Preis beim Architekturwettbewerb Dachwelten
31 Gute Gründe fürs Gründen | Das Projekt „TRACE“ macht Studierende fit für den Sprung ins Unternehmertum
32 Meldungen/Studium International
34 Mit Bildung Brücken bauen | Studierende des Fachbereichs Bauingenieurwesen waren auf Exkursion in China
36 Machts wie Magellan – bereist die Welt! | Tori Patterson und Prof. Fredebeul-Krein zum Thema internationaler Dozentenaustausch
38 Überleben im interkulturellen Dschungel | Interview mit Prof. Dr. Matthias Weßling
40 Multikulti: Ein türkischstämmiger Deutscher in Südkorea | Mustafa Kayhan hat ein Semester in Anyang studiert FORSCHUNG UND TRANSFER
42 Doktor down under | Eugen Neu, Julian Schirra und Matthias Eickmann promovieren in Australien
44 Mit Haut und Haar | Zellen im Tabula-Rasa-Zustand
48 Medikamente werden „geerntet“ | Neues Verfahren macht es möglich, Medikamente günstiger herzustellen
49 App-Hilfe gegen Informationsflut | Neue mobile Anwendung des m2c-lab zur Entschärfung von Krisensituationen
50 Laster ohne Laster | Doktoranden von FH und TH forschen gemeinsam an alternativen Nutzfahrzeugantrieben
51 Erfahrung sammeln, Kontakte knüpfen | Seit 2006 haben 20 FH-Studierende ihre Abschlussarbeiten beim Industrieofenbauer und Edelstahlgießer Otto Junker gemacht
52 Schulterschluss von Wirtschaft und Wissenschaft | FH Aachen gründet Produktionstechnikcluster mit 3win
53 Mit Volldampf | Technologietransfer für die Zukunft Personen
54 FH Aachen trauert um ihren ersten Honorarprofessor | Prof. Dr. h. c. Jesco Freiherr von Puttkamer ist tot
56 Eine Phase des Umbruchs | Prof. Dr. Norbert Janz ist neuer Prorektor für Lehre und Studium
57 Mit Energie und Tatendrang | Carola Schneiders ist neue Energiemanagerin an der FH Aachen
58 Neuer Hochschulrat für die FH | Klaus Hamacher übernimmt den Vorsitz
59 Meldungen/Personen
60 Absolventen 2012 | Krönung im Krönungssaal
73 Dienstjubiläen, Bücher /Neuauflagen
74 Stipendienvergabe 2012 | Eine ganz besondere Auszeichnung
76 Neuberufene Professoren SERVICE
78 FH als Marke | Einkaufen im Onlineshop
79 Lecker Technik! | Neue FH-Lok am Aachener Hauptbahnhof
80 Knusper, knusper, knäuschen… | ...wer baut das schönste Häuschen
81 Wenn Grundschüler Stift und Papier gegen Laborkittel und Schutzbrille tauschen | „Helle Köpfe“ zu Gast an der FH
82 Hochschule zum Anfassen | Beim FH4you-Camp bekommen Schülerinnen einen ersten Eindruck vom Studium
83 Meldungen/Service, Messen und Veranstaltungen
90 Ortswechsel | Der Ayers Rock von Jülich
91 Impressum