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Mathematik PLuS als E-Book. Kann ein E-Book zur Ingenieursmathematik alle Lerntypen ansprechen?
(2017)
Blackout : Wenn bei uns allen das Licht ausgeht
Inhaltsverzeichnis:
06 Wenn im Elfenbeinturm das Licht ausgeht: Zur gesellschaftlichen Verantwortung der Wissenschaft
12 Mekka der Solarforschung: Das Solar-Institut Jülich feiert Jubiläum- und blick nach vorn
16 Hinter den Steinen: FH Aachen und die Stiftung Smart Building entwickeln gemeinsam den neuen Studiengang Smart Building Engineering
18 Die Biogaspioniere: Das Institut NOWUM-Energy sucht neue Perspektiven für die Energieerzeugung
22 Elektrisierend: Studentin entwirft Tapuya-Bühne für Electrisize Festival
24 keep calm and don´t panic
26 Der Markt als Experimentierfeld: Die Wirtschaft wandelt sich - die FH mischt in der Gründerszene mit
30 Mit einem Studium in ein neues Leben: Betreuungskonzept für Geflüchtete an der FH Aachen
32 Spuren im Staub
34 Auf Archimedes´ Spuren: Studierende stechen mit Betonkanus in See
36 "Ich investiere in Menschen": Interview mit Alexander Wilden, Inhaber der schwartz Gruppe mit Hauptsitz in Simmerath
40 Wie im richtigen Leben: 10 Jahre pro8: Rückblick und Ausblick
42 Zwei Kreuze für die Christuskirche: Entwürfe von Architekturstudienden werden umgesetzt
44 Eine gute Ausbildung ist prkatisch: Florian Kessel macht grenzüberschreitende Karriere
46 Er will das Feuer weitergeben: Holzbaupionier Prof. Hermann Blumer lehrt an der FH
50 Aufwind für innovative Lehre: Fünf Projekte im Rahmen des SQSL-Programms ausgezeichnet
51 Der einsame Turm: Kopfnuss
52 Vom Winde verweht: Benedikt Lösch kommt bei der Segelweltmeisterschaft auf Rang 28
54 Wüstensand und fliegende Roboter: Team des MASKOR-Instituts erreicht Finalrunde beim MBZIRC-Wettbewerb
56 Die Rattan-Revolution: Das Start-up "out for space" erfindet den Werkstoff neu
Dimensionen 1-2017 : Magazin der FH Aachen University of Applied Sciences - Struktur und Freiheit
(2017)
Inhalt Dimensionen 01-2017:
6 Struktur und Freiheit : Wie die Digitalisierung die Lehre beeinflusst
12 Wie wir in Zukunft konsumieren : Vom intelligenten Kühlschrank bis zur selbst gedruckten Brille
16 Baby unter Beobachtung : Forscher der FH decken massive Sicherheitsmängel bei Babymonitoringsystem auf
18 "In unserem Auge ist viel los" : Anissa Frank hat sich in ihrer Bachelorarbeit mit dem Phänomenen des kreisrunden Makulaloches beschäftigt
20 #totallove : Was kommt nach dem "Hotel Total"?
24 Das graue Wunder : Dirk Thal, Leon Bockstegers und Erick Regehr sind überzeugt: "Beton kann mehr"
26 Auftrieb : Zwei FH-Innovationen landen beim Luftfahrtkonzern Airbus
30 Ich möchte die Kunst demokratisieren : David Gerards bietet Künstlern mit dem "Poebel" eine Plattform
32 Zwischen Orient und Okzident : Unterwegs in Marokko
38 Einfach genau hinhören und horchen : Interview mit Prof. Dr. Hans-Joachim Blome zum Thema Gravitationswellen
42 Die Entdeckung eines Architekten : Auf den Spuren des Architekten Leonardo da Vinci
46 Über den Dächern von Chicago
48 Eine Prothese aus dem 3D-Drucker : Studierende engagieren sich für ein Projekt, das vielen Menschen in Krisenregionen helfen kann
50 Ist der Tod das Ende unserer Persönlichkeit? Prof. Dr. Walter van Laack ist Experte auf dem Gebiet Nahtoderfahrungen
52 Von Aachen in die ganze Welt : Die Summer Schools sind der Exportschlager der FH Aachen
59 Ein Stipendium zum Geburtstag
60 Keine Chance für Shimmy
58 Kopfnuss
61 Neues Buch über Prof. Rudold Schwarz
62 Silber beim PR-Bild-Award
63 Impressum
Einleitung vor § 1297
(2017)
Vorbemerkung vor § 1297
(2017)
Vorbemerkung vor § 1353
(2017)
Combined with the use of renewable energy sources for
its production, Hydrogen represents a possible alternative gas
turbine fuel for future low emission power generation. Due to
its different physical properties compared to other fuels such
as natural gas, well established gas turbine combustion
systems cannot be directly applied for Dry Low NOx (DLN)
Hydrogen combustion. This makes the development of new
combustion technologies an essential and challenging task
for the future of hydrogen fueled gas turbines.
The newly developed and successfully tested “DLN
Micromix” combustion technology offers a great potential to
burn hydrogen in gas turbines at very low NOx emissions.
Aiming to further develop an existing burner design in terms
of increased energy density, a redesign is required in order to
stabilise the flames at higher mass flows and to maintain low
emission levels.
For this purpose, a systematic design exploration has
been carried out with the support of CFD and optimisation
tools to identify the interactions of geometrical and design
parameters on the combustor performance. Aerodynamic
effects as well as flame and emission formation are observed
and understood time- and cost-efficiently. Correlations
between single geometric values, the pressure drop of the
burner and NOx production have been identified as a result.
This numeric methodology helps to reduce the effort of
manufacturing and testing to few designs for single
validation campaigns, in order to confirm the flame stability
and NOx emissions in a wider operating condition field.
Nowadays, the most employed devices for recoding videos or capturing images are undoubtedly the smartphones. Our work investigates the application of source camera identification on mobile phones. We present a dataset entirely collected by mobile phones. The dataset contains both still images and videos collected by 67 different smartphones. Part of the images consists in photos of uniform backgrounds, especially collected for the computation of the RSPN. Identifying the source camera given a video is particularly challenging due to the strong video compression. The experiments reported in this paper, show the large variation in performance when testing an highly accurate technique on still images and videos.
The gene encoding a putative (R,R)-butane-2,3-diol dehydrogenase (bdhA) from Bacillus clausii DSM 8716T was isolated, sequenced and expressed in Escherichia coli. The amino acid sequence of the encoded protein is only distantly related to previously studied enzymes (identity 33–43%) and exhibited some uncharted peculiarities. An N-terminally StrepII-tagged enzyme variant was purified and initially characterized. The isolated enzyme catalyzed the (R)-specific oxidation of (R,R)- and meso-butane-2,3-diol to (R)- and (S)-acetoin with specific activities of 12 U/mg and 23 U/mg, respectively. Likewise, racemic acetoin was reduced with a specific activity of up to 115 U/mg yielding a mixture of (R,R)- and meso-butane-2,3-diol, while the enzyme reduced butane-2,3-dione (Vmax 74 U/mg) solely to (R,R)-butane-2,3-diol via (R)-acetoin. For these reactions only activity with the co-substrates NADH/NAD+ was observed. The enzyme accepted a selection of vicinal diketones, α-hydroxy ketones and vicinal diols as alternative substrates. Although the physiological function of the enzyme in B. clausii remains elusive, the data presented herein clearly demonstrates that the encoded enzyme is a genuine (R,R)-butane-2,3-diol dehydrogenase with potential for applications in biocatalysis and sensor development.
The Dry-Low-NOx (DLN) Micromix combustion technology has been developed originally as a low emission alternative for industrial gas turbine combustors fueled with hydrogen. Currently the ongoing research process targets flexible fuel operation with hydrogen and syngas fuel.
The non-premixed combustion process features jet-in-crossflow-mixing of fuel and oxidizer and combustion through multiple miniaturized flames. The miniaturization of the flames leads to a significant reduction of NOx emissions due to the very short residence time of reactants in the flame.
The paper presents the results of a numerical and experimental combustor test campaign. It is conducted as part of an integration study for a dual-fuel (H2 and H2/CO 90/10 Vol.%) Micromix combustion chamber prototype for application under full scale, pressurized gas turbine conditions in the auxiliary power unit Honeywell Garrett GTCP 36-300.
In the presented experimental studies, the integration-optimized dual-fuel Micromix combustor geometry is tested at atmospheric pressure over a range of gas turbine operating conditions with hydrogen and syngas fuel. The experimental investigations are supported by numerical combustion and flow simulations. For validation, the results of experimental exhaust gas analyses are applied.
Despite the significantly differing fuel characteristics between pure hydrogen and hydrogen-rich syngas the evaluated dual-fuel Micromix prototype shows a significant low NOx performance and high combustion efficiency. The combustor features an increased energy density that benefits manufacturing complexity and costs.
Investigation Of The Seismic Behaviour Of Infill Masonry Using Numerical Modelling Approaches
(2017)
Masonry is a widely spread construction type which is used all over the world for different types of structures. Due to its simple and cheap construction, it is used as non-structural as well as structural element. In frame structures, such as
reinforced concrete frames, masonry may be used as infill. While the bare frame itself is able to carry the loads when it comes to seismic events, the infilled frame is not able to warp freely due to the constrained movement. This restraint results in a complex interaction between the infill and the surrounding frame, which may lead to severe damage to the infill as well as the surrounding frame. The interaction is studied in different projects and effective approaches for the description of the behavior are still lacking. Experimental programs are usually quite expensive, while numerical models, once validated, do offer an efficient approach for the investigation of the interaction when horizontally loaded. In order to study the numerous parameters influencing the seismic load bearing behavior, numerical models may be used. Therefore, this contribution presents a numerical approach for the simulation of infill masonry in reinforced concrete frames. Both parts, the surrounding frame as well as the infill are represented by micro modelling approaches to correctly take into account the different types of failure. The adopted numerical model describes the inelastic behavior of the system, as indicated by the obtained results of the overall structural response as well as the formation of damage in the infilled wall. Comparison of the numerical and experimental results highlights the valuable contribution of numerical simulations in the study and design of infilled frames. As damage of the infill masonry may occur in-plane due to the interaction as well as out-of-plane due to the low vertical load, both directions of loading are investigated.
Analysis Of Base Isolated Liquid Storage Tanks With 3D Fsi-Analysis As Well As Simplified Approaches
(2017)
Tanks are preferably designed, for cost-saving reasons, as circular, cylindrical, thin-walled shells. In case of seismic excitation, these constructions are highly vulnerable to stability failures. An earthquake-resistant design of rigidly supported tanks for high seismic loading demands, however, uneconomic wall thicknesses. A cost-effective alternative can be provided by base isolation systems. In this paper, a simplified seismic design procedure for base isolated tanks is introduced, by appropriately modifying the standard mechanical model for flexible, rigidly supported tanks. The non-linear behavior of conventional base isolation systems becomes an integral part of a proposed simplified process, which enables
the assessment of the reduced hydrodynamic forces acting on the tank walls and the corresponding stress distribution. The impulsive and convective actions of the liquid are taken into account. The validity of this approach is evaluated by
employing a non-linear fluid-structure interaction algorithm of finite element method. Special focus is placed on the boundary conditions imposed from the base isolation and the resulting hydrodynamic pressures. Both horizontal and vertical
component of ground motion are considered in order to study the principal effects of the base isolation on the pressure distribution of the tank walls. The induced rocking effects associated with elastomeric bearings are discussed. The results
manifest that base isolated tanks can be designed for seismic loads by means of the proposed procedure with sufficient accuracy, allowing to dispense with numerically expensive techniques.
Es existieren verschiedenste Arten von Spielen, die versuchen, die Motivation einer Spielsituation in einen ernsten Kontext zu überführen. In diesem Artikel wird der Überbegriff „Competence Developing Games“ definiert und anhand von Beispielen erläutert. Dafür werden Erkennungskriterien vorgestellt, entsprechende Spieltypen erläutert und eine Zuordnung durch-geführt.
The concept of a laser-enhanced solar sail is introduced and the radiation pressure force model for an ideal laser-enhanced solar sail is derived. A laser-enhanced solar sail is a “traditional” solar sail that is, however, not solely propelled by solar radiation, but additionally by a laser beam that illuminates the sail. The additional laser radiation pressure increases the sail's propulsive force and can give, depending on the location of the laser source, more control authority over the direction of the solar sail’s propulsive force vector. This way, laser-enhanced solar sails may augment already existing solar sail mission concepts and make novel mission concepts feasible.
In the future, we expect manufacturing companies to follow a new paradigm that mandates more automation and autonomy in production processes. Such smart factories will offer a variety of production technologies as services that can be combined ad hoc to produce a large number of different product types and variants cost-effectively even in small lot sizes. This is enabled by cyber-physical systems that feature flexible automated planning methods for production scheduling, execution control, and in-factory logistics.
During development, testbeds are required to determine the applicability of integrated systems in such scenarios. Furthermore, benchmarks are needed to quantify and compare system performance in these industry-inspired scenarios at a comprehensible and manageable size which is, at the same time, complex enough to yield meaningful results.
In this chapter, based on our experience in the RoboCup Logistics League (RCLL) as a specific example, we derive a generic blueprint for how a holistic benchmark can be developed, which combines a specific scenario with a set of key performance indicators as metrics to evaluate the overall integrated system and its components.