Fachbereich Elektrotechnik, Maschinenbau, Technikjournalismus
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Umwelt: Technologien, um die Folgen des Klimawandels zu begrenzen, gibt es. Die soziale und politische Dimension ist der Hemmschuh, so dass sie teils nur zögernd zum Einsatz kommen.
Die Redaktion der VDI nachrichten betreute drei Studierende, die aktuell von jedem Vortrag einen Artikel für unser Ingenieurportal www.ingenieur.de schrieben sowie eine Meldung für die VDI-nachrichten-E-Paper-App. Dieser Artikel ist das Resümee der drei zur Ringvorlesung, aber keine inhaltlich komplette Zusammenfassung. Alle Artikel lesen Sie online unter: www.ingenieur.de/Ringvorlesung2018
Die Anforderungen an die Tragfähigkeit von Seilrollen aus Guss-Polyamiden nehmen aufgrund der Erwartungen hinsichtlich der maximal zu realisierenden Hublasten bei neueren Förder- und Hebegeräte stetig zu. Die heutige Konstruktionspraxis erlaubt für normale Betriebsbedingungen eine gesicherte Auslegung der Seilrollen. Aus jahrelanger Erfahrung sind hierfür Grenzwerte für maximal zulässigen Belastungen im Betrieb unter verschiedensten Betriebsbedingungen gewonnen worden. Jedoch ist bei steigenden Lasten, besserer Ausnutzung des Werkstoffpotenzials oder Modifikationen des Basiswerkstoffs nur noch eine eingeschränkte Bestimmung der tatsächlichen "Worst-Case"-Tragfähigkeit mit dieser Konstruktionspraxis möglich. Berechnungsmodelle einer neuen Bemessungsgrundlage basieren auf der Anwendung der Finite Elemente Methode. Die ersten Berechnungsmodelle aus der modifizierten Bemessungsgrundlage ermöglichen den Einfluss von geometrischen Änderungen der Form bzw. der Ausführung, von lokalen Materialeigenschaften und von realistischere Lastzustände auf den Deformationsund Spannungszustand einer Seilrolle theoretisch zu beschreiben. Weitere Berechnungsmodelle, die z.B. die Erwärmung der Seilrolle durch die Rollreibung zwischen Seil und Seilrolle sowie des Walkens durch die Bewegung des Seiles bei dynamischer Belastung beschreiben können, sind in der Entwicklung. Für den Konstrukteur werden zudem parametrisierte Geometrie-, Last- und FE-Modelle entwickelt, die eine schnelle und betriebssichere Dimensionierung von Seilrollen aus Guss-Polyamiden ermöglichen. Alle theoretischen Ergebnisse werden z.Z. durch umfangreiche Versuche abgesichert.
Ausgangspunkt der im Folgenden vorgestellten Semesterstruktur war die Umstellung der vorhandenen Diplomstudiengänge auf den Bachelor-Abschluss. Am Fachbereich werden drei grundständige Studiengänge angeboten; die technischen Studiengänge Elektrotechnik und Maschinenbau sowie der interdisziplinäre Studiengang Technikjournalismus, der den Geistes- und Sozialwissenschaften zuzurechnen ist. Ebenfalls sind duale Studiengänge vorhanden, die an grundständige Studiengänge angelehnt sind.
The paper presents a new control strategy of management of transport companies operating in completive transport environment. It is aimed to optimise the headway of transport companies to provide the balance between costs and benefits of operation under competition. The model of transport system build using AnyLogic comprises agent-based and discrete-event techniques. The model combined two transport companies was investigated under condition of the competition between them. It was demonstrated that the control strategy can ensure the balance of interests of transport companies trying to find compromise between cost of operation and quality of service.
Work in progress: Starter-project for first semester students to survey their engineering studies
(2015)
To give students studying Electrical or Mechanical Engineering at the Bonn-Rhein-Sieg University of Applied Sciences a smoother beginning, three weeks in the first semester are used for project-based learning and self-learning exercises. The project-based learning part is used to do short-term projects (1 to 3 days) to motivate all the different subjects (mathematics, computer sciences, microcontrollers, principles of electrical engineering, measurement engineering and others) engineering students have to study during their time at the university and show the connection between these subjects. Short-term projects allow an insight into the real world of engineering, improve the student motivation, and enable students to develop soft skills. If projects like this are done in the beginning of the study it also helps them tremendously to connect to their fellow students. Further, there is the intention to prepare a situation where students “feel like engineers”. This paper presents a three full-day (organised on three days with four weeks gaps in between) course in the winter term 2014 using LEGO Mindstorm robot kits to give students an easy access to programming, algorithms, sensor technology, robotics and much more.
Für gute Lehre und geschicktes Lernen ist es wichtig, die Funktionsweisen des Gehirns in Ansätzen zu verstehen. Im Gehirn werden Informationen biologisch gespeichert. Verbindungen müssen aufgebaut werden; Verbindungswege, die oft begangen werden, verbreitern sich. Informationen werden miteinander vernetzt. Das Wissen wird dabei nicht einfach abgespeichert wie auf einer Festplatte, sondern konstruiert, aus Informationsbausteinen zusammengesetzt zu einem mehr oder weniger übereinstimmenden Abbild der äußeren Welt. Durch die Gestaltung unserer Lehre, aber auch unserer Prüfungen, aktivieren wir die Lernenden, sich ein eigenes Bild zu machen, den Stoff zu durchdenken und ihn so zu verinnerlichen, dass er später auch angewendet wird. Hierzu sind verschiedene hier vorgestellte Ansätze hilfreich.
The partition coefficient of a substance measures its solubility in octanol compared with water and is widely used to estimate toxicity. If a substance is hardly soluble in octanol, then it is practically impossible for it to enter (human) cells and therefore is less likely to be toxic. For novel drugs it might be important to penetrate the cell through the membrane or even integrate into it. While for most simple substances the partition coefficient is concentration-independent at low concentrations, this is not true for a few important classes of complex molecules, such as ionic liquids or tensides. We present a simple association–dissociation model for concentration dependence of the partition coefficient of ionic liquids. Atomistic computer simulations serve to parametrize our model by calculating solvation free energies in water and octanol using thermodynamic integration. We demonstrate the validity of the method by reproducing the concentration-independent partition coefficients of small alcohols and the concentration-dependent partition coefficient of a commonly used ionic liquid, 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide [C4MIM][NTf2]. The concentration dependence is accurately predicted in a concentration range of several orders of magnitude.
Werkstattgeflüster
(2014)
Seit der Saison 2014 veröffentlichen wir alle 4 Monate unseren Newsletter "Werkstattgeflüster", der unseren Unterstützern, Förderern und Freunden gleichermaßen einen Einblick in unser Projekt geben soll. Über die Saison verteilt möchten wir so verstärkt über die Events und unsere Zusammenarbeit mit unseren Sponsoren berichten und unseren Mitgliedern die Chance geben, Ihre Arbeit im Team vorzustellen.
The main requirements of efficient steganographic systems are transparency, robustness and security. In this work, the proposed system is designed to achieve these requirements, as follows: to increase the transparency and robustness, the proposed system uses the transform domain technique, in this case the wavelet domain technique to embed the color secret image into the color cover image. To achieve high security, chaotic systems are used to accomplish the following two purposes: firstly to scramble the secret color image before hiding it into the color cover image, secondly to randomly select the embedding positions in the cover image. Three chaotic systems with many combinations are used for the scrambling and the embedding process. Experimental results including Mean Square Error (MSE), Peak Signal to Noise Ratio (PSNR), Correlation, Signal to Noise Ratio (SNR) and embedding capacity demonstrate that the proposed system has good performance as compared with other existing methods without attack and under different types of attacks such as filtering and noise attacks. Simulation results show that the combination of chaotic systems providing the best performance include the use of Logistic and Hénon maps for the embedding process and Arnold's cat map for the encryption process. The MSE, PSNR, correlation, SNR and embedding capacity obtained in this case reach up to 0.0010, 78.1dB, 0.9999, 67.2dB and 0.39% respectively when the secret image is Airplane with 32×32 pixels and the cover image is Girl with 512×512 pixels. For the extracted secret image, the chaotic system set that provides the best performance includes the use of Arnold's cat map for the encryption process. The MSE, PSNR, correlation and SNR obtained in this case reach up to 0.0846, 58.9dB, 1 and 56.1dB respectively. As compared with other methods, the proposed method achieves gains without any attack of 8.2dB for the stego image and 32.4dB for the extracted secret image in PSNR when the secret image is Airplane with 256×256 pixels and the cover image is Girl with 512×512 pixels.
DeltaV Neural ist eine Softwareapplikation innerhalb des Prozessautomatisierungssystems DeltaV, die es dem Anwender ermöglicht, auf einfache Art und Weise Softsensoren zu konfigurieren. Softsensoren besitzen die Aufgabe, schwer messbare oder nur in großen Zeitabständen ermittelbare Prozessausgangsgrößen mittels einfacher und schneller messbarer Ersatzmessgrößen zu schätzen bzw. vorherzusagen.
In this contribution, we examine how visualization on an ultra high-resolution display wall can augment force-field research in the field of molecular modeling. Accurate force fields are essential for producing reliable simulations, and subsequently important for several fields of applications (e.g. rational drug design and biomolecular modeling). We discuss how using HORNET, a recently constructed specific ultra high-resolution tiled display wall, enhances the visual analytics that are necessary for conformational-based interpretation of the raw data from molecular calculations. Simultaneously viewing multiple potential energy graphs and conformation overlays leads to an enhanced way of evaluating force fields and in their optimization. Consequently, we have integrated visual analytics into our existing Wolf2Pack workflow. We applied this workflow component to analyze how major AMBER force fields (Parm14SB, Gaff, Lipid14, Glycam06j) perform at reproducing the quantum mechanics relative energies and geometries of saturated hydrocarbons. Included in this comparison are the 1996 OPLS force field and our newly developed ExTrM force field. While we focus on atomistic force fields the ideas presented herein are generalizable to other research areas, particularly those that involve numerous representations of large data amounts and whose simultaneous visualization enhances the analysis.
Der Nutzen von Prozessmanagement für die Effizienz und Effektivität der Organisation von Unternehmen ist vielfach bestätigt. Eine Studie der gfo-Gesellschaft für Organisation stellt fest, dass der Umsetzungsgrad der Prozessorganisation in Unternehmen dennoch mangelhaft ist. Es fehlt die Unterstützung der Leitung, die selbst noch überwiegend funktional organisiert ist.
Computer simulations of chemical systems, especially systems of condensed matter, are highly important for both scientific and industrial applications. Thereby, molecular interactions are modeled on a microscopic level in order to study their impact on macroscopic phenomena. To be capable of predicting physical properties quantitatively, accurate molecular models are indispensable. Molecular interactions are described mathematically by force fields, which have to be parameterized. Recently, an automated gradient-based optimization procedure was published by the authors based on the minimization of a loss function between simulated and experimental physical properties. The applicability of gradient-based procedures is not trivial at all because of two reasons: firstly, simulation data are affected by statistical noise, and secondly, the molecular simulations required for the loss function evaluations are extremely time-consuming. Within the optimization process, gradients and Hessians were approximated by finite differences so that additional simulations for the respective modified parameter sets were required. Hence, a more efficient approach to computing gradients and Hessians is presented in this work. The method developed here is based on directional instead of partial derivatives. It is compared with the classical computations with respect to computation time. Firstly, molecular simulations are replaced by fit functions that define a functional dependence between specific physical observables and force field parameters. The goal of these simulated simulations is to assess the new methodology without much computational effort. Secondly, it is applied to real molecular simulations of the three chemical substances phosgene, methanol and ethylene oxide. It is shown that up to 75% of the simulations can be avoided using the new algorithm.
Improving the study entry supports students in a decisive phase of their university education. Implementing improvements is a change process and can only be successful if the relevant stakeholders are addressed and convinced. In the described Teaching Quality Pact project evaluation data is used as a mean to discuss in the university the situation of the study programs. As these discussions were based on empirical data rather than on opinion, it was possible to achieve an open discussion about measures that are implemented. The open discussion is maintained during the project when results of the measures taken are analyzed.
Using an Embroidery Machine to Achieve a Deeper Understanding of Electromechanical Applications
(2013)
Understanding the functionality of real-world machines and thinking about their improvements is a method to deepen the acquired knowledge of electrical and mechanical engineering students. The Department of Electrical Engineering, Mechanical Engineering and Technical Journalism of the Bonn-Rhine-Sieg University of Applied Sciences in Germany provides a project-based learning environment in the so-called “project weeks”. Three weeks of a term are available to do some real-world projects besides the regular courses [1]. This provides a “project-based” learning environment that enables the students to connect theory and practice and to apply knowledge and skills to solve practical problems. In the winter term 2012/13 an unusual open-defined project was offered for the first time to third-semester students showing high potentials. The students were presented with an unknown embroidery machine and their task was to improve it, depending on their knowledge and abilities. This article describes a project in which an embroidery machine was used as a basis for developing better understanding of many aspects of electrical and mechanical engineering.
Transition point prediction in a multicomponent lattice Boltzmann model: Forcing scheme dependencies
(2018)
Pseudopotential-based lattice Boltzmann models are widely used for numerical simulations of multiphase flows. In the special case of multicomponent systems, the overall dynamics are characterized by the conservation equations for mass and momentum as well as an additional advection diffusion equation for each component. In the present study, we investigate how the latter is affected by the forcing scheme, i.e., by the way the underlying interparticle forces are incorporated into the lattice Boltzmann equation. By comparing two model formulations for pure multicomponent systems, namely the standard model [X. Shan and G. D. Doolen, J. Stat. Phys. 81, 379 (1995)] and the explicit forcing model [M. L. Porter et al., Phys. Rev. E 86, 036701 (2012)], we reveal that the diffusion characteristics drastically change. We derive a generalized, potential function-dependent expression for the transition point from the miscible to the immiscible regime and demonstrate that it is shifted between the models. The theoretical predictions for both the transition point and the mutual diffusion coefficient are validated in simulations of static droplets and decaying sinusoidal concentration waves, respectively. To show the universality of our analysis, two common and one new potential function are investigated. As the shift in the diffusion characteristics directly affects the interfacial properties, we additionally show that phenomena related to the interfacial tension such as the modeling of contact angles are influenced as well.
Wireless sensor networks are widely used in a variety of fields including industrial environments. In case of a clustered network the location of cluster head affects the reliability of the network operation. Finding of the optimum location of the cluster head, therefore, is critical for the design of a network. This paper discusses the optimisation approach, based on the brute force algorithm, in the context of topology optimisation of a cluster structure centralised wireless sensor network. Two examples are given to verify the approach that demonstrate the implementation of the brute force algorithm to find an optimum location of the cluster head.
The paper discusses utilisation of the brute force methods for the task of towers distribution in wireless communication systems. The proposed algorithm allows to find an optimal allocation of a tower between the settlements. A simple wireless communication has been used as an example to investigate the functionality of the algorithm's software.
We present the performance of the upGREAT heterodyne array receivers on the SOFIA telescope after several years of operations. This instrument is a multi-pixel high resolution (R≳10 7 R≳107) spectrometer for the Stratospheric Observatory for Far-Infrared Astronomy (SOFIA). The receivers use 7-pixel subarrays configured in a hexagonal layout around a central pixel. The low frequency array receiver (LFA) has 2×7 2×7 pixels (dual polarization), and presently covers the 1.83–2.07 THz frequency range, which allows to observe the [CII] and [OI] lines at 158 μ μm and 145 μ μm wavelengths. The high frequency array (HFA) covers the [OI] line at 63 μ μm and is equipped with one polarization at the moment (7 pixels, which can be upgraded in the near future with a second polarization array). The 4.7 THz array has successfully flown using two separate quantum-cascade laser local oscillators from two different groups. NASA completed the development, integration and testing of a dual-channel closed-cycle cryocooler system, with two independently operable He compressors, aboard SOFIA in early 2017 and since then, both arrays can be operated in parallel using a frequency separating dichroic mirror. This configuration is now the prime GREAT configuration and has been added to SOFIA’s instrument suite since observing cycle 6.
We present a new multi-pixel high resolution (R ≳ 107) spectrometer for the Stratospheric Observatory for Far-Infrared Astronomy (SOFIA). The receiver uses 2 × 7-pixel subarrays in orthogonal polarization, each in an hexagonal array around a central pixel. We present the first results for this new instrument after commissioning campaigns in May and December 2015 and after science observations performed in May 2016. The receiver is designed to ultimately cover the full 1.8−2.5 THz frequency range but in its first implementation, the observing range was limited to observations of the [CII] line at 1.9 THz in 2015 and extended to 1.83−2.07 THz in 2016. The instrument sensitivities are state-of-the-art and the first scientific observations performed shortly after the commissioning confirm that the time efficiency for large scale imaging is improved by more than an order of magnitude as compared to single pixel receivers. An example of large scale mapping around the Horsehead Nebula is presented here illustrating this improvement. The array has been added to SOFIA’s instrument suite already for ongoing observing cycle 4.
The Project SupraMetall: Towards Commercial Fabrication of High-Temperature Superconducting Tapes
(2014)
The aim of the joint industrial and academic project “SupraMetall” is to enable the large scale production of superconducting tapes. This is a report of the recent achievements in the production of cube textured metal substrates and the coating techniques of the buffer and superconductive layers. The final coated conductor tapes of 2 m length reached critical current densities of 120 A/cm-width.
We report on the setup and initial discoveries of the Northern High Time Resolution Universe survey for pulsars and fast transients, the first major pulsar survey conducted with the 100-m Effelsberg radio telescope and the first in 20 years to observe the whole northern sky at high radio frequencies. Using a newly developed 7-beam receiver system combined with a state-of-the-art polyphase filterbank, we record an effective bandwidth of 240 MHz in 410 channels centred on 1.36 GHz with a time resolution of 54 μs. Such fine time and frequency resolution increases our sensitivity to millisecond pulsars and fast transients, especially deep inside the Galaxy, where previous surveys have been limited due to intrachannel dispersive smearing. To optimize observing time, the survey is split into three integration regimes dependent on Galactic latitude, with 1500, 180 and 90-s integrations for latitude ranges |b| < 3 ∘.5, |b| < 15° and |b| > 15°, respectively. The survey has so far resulted in the discovery of 15 radio pulsars, including a pulsar with a characteristic age of ∼18 kyr, PSR J2004+3429, and a highly eccentric, binary millisecond pulsar, PSR J1946+3417. All newly discovered pulsars are timed using the 76-m Lovell radio telescope at the Jodrell Bank Observatory and the Effelsberg radio telescope. We present timing solutions for all newly discovered pulsars and discuss potential supernova remnant associations for PSR J2004+3429.
In this contribution we present the concept for creating an “International Chair” position at a German University of Applied Sciences and our experiences in its first implementation. Our primary goal was to increase the diversity of the university’s teaching personalities and enrich student education by including content, methods, examples and experiences from other cultures. This gives students an international and intercultural learning experience that is otherwise only acquired through studying abroad. We conclude that the International Chair is a valuable and powerful university tool for increasing international exposure to the departments, their staff and students.
In light of emobility, the development of efficiency improved drivetrain components will also have a high priority. Whereas for conventional vehicle propulsion systems (i.e. combustion type engines) the avoidance of CO2 penalty was in strong focus, for electrified vehicles it is the impact on vehicle range. For GKN Driveline as the world's leading supplier of driveline components and systems, the prediction of energy savings is of particular importance in order to quantify the benefit of efficiency optimizations on the energy consumption of the vehicles. This paper gives an introduction to a simplified and transparent method of modelling to provide a basic understanding of the impact of efficiency improvements. Hereby it is shown, that with the increasing electrification of the drivetrain, the optimization of the efficiency in the mechanical path of power transmission will become even more important.
Wireless Network has become the critical part of the communication infrastructure in our environment. Nowadays, the using of mobile computing devices such as laptops and Wi-Fi enabled phones in the workplace is increasing. The design of wireless networks for enterprise environments remains a challenging task due to the problem of topological design. In this paper, we discuss the computational aspects of the task of calculation the various criteria of efficiency wireless networks' topology. These criteria determine the different characteristics of wireless networks - the access level of populations to network services, the level of the distributed signal and the level of signal accepted in the city. We use brute force algorithm for comparing the different criteria of efficiency the topology of wireless networks. The brute force algorithm has high computational complexity therefore in our experiments we use parallel computing to solve the problem. For illustration the results we use the task of optimization the Wireless network topology for fragment of Myanmar territory.
Formula Student is known worldwide as a design contest for engineering students, in which they train technical skills and engineering thinking by developing and manufacturing a single-seated race car every year. The efficient transfer of highly specialized and professional knowledge about physics and manufacturing has to be ensured every year, as the members turn into alumni. This requires much more than only technical skills.
In this contribution, we want to present how the Bonn-Rhine-Sieg University of Applied Sciences supports its Formula Student team in order to foster and exploit its great potentials with a systematic approach, under the supervision of its team faculty advisor. We show how senior students learn how to teach their fellow students in their highly specialized skills in a so called “Race Academy”. This aims at the evolution of teaching content, and the art of teaching itself, by systematically involving peers in the teaching process.
At the Bonn-Rhine-Sieg University of Applied Science, Germany, students now learn about sustainability in each semester.
Climate change and limitations of fossil resources are demanding problems engineers have to solve today and much more in future. They will be asked to find solutions for providing energy from renewable sources, reducing consumption of resources and enhancing efficiency of energy and material input.
To prepare the students for this challenging work, the department of Mechanical Engineering, Electrical Engineering and Technical Journalism (EMT) has decided to educate their students of electrical and mechanical engineering in every semester in topics of sustainability and the students of Technical Journalism in ecology and environmental sciences. This continuous sequence of topics in the curriculum is called the “Blue Track“. Contents are e.g. E-Mobility, Smart Grids, sustainable product development and renewable energies.
A terahertz (THz) heterodynespectrometer is demonstrated based on a quantum cascade laser(QCL) as a local oscillator (LO) and an NbN hot electron bolometer as a mixer, and it is used to measure high-resolution molecular spectral lines of methanol (CH 3 OH) between 2.913–2.918 THz. The spectral lines are taken from a gas cell containing methanol gas and using a single-mode QCL at 2.9156 THz as an LO, which is operated in the free running mode. By increasing the pressure of the gas, line broadening and saturation are observed. The measuredspectra showed good agreement with a theoretical model.
Technik ist heutzutage allgegenwärtig und beeinflusst Wirtschaft und Gesellschaft. Die Bundesrepublik Deutschland erwirtschaftet als Industriestaat ihr Bruttosozialprodukt zu einem bedeutenden Anteil aus der Entwicklung und Produktion von technischen Gütern. Hieran sind Personen mit unterschiedlicher Ausbildung in verschiedenen Tätigkeiten beteiligt. Ingenieure kümmern sich um die Technik, Betriebswirte um die Finanzen, Juristen um rechtliche Fragen. So zumindest die Theorie.
Die allgemeine Konnotation von Technik mit Männlichkeit hat Auswirkungen auf die Berufswahlentscheidungen und das Technikverständnis von jungen Frauen. Nur gut 22 Prozent aller Studierenden in den Ingenieurswissenschaften waren 2014 in Deutschland weiblich (vgl. MonitorING)1. Seit Jahren wird versucht, diese Zahlen nach oben zu korrigieren, indem man Programme für Mädchen und junge Frauen anbietet, die erste Kontakte zu technischen Arbeitsfeldern her stellen. Auch für bereits berufstätige Ingenieurinnen gibt es zahlreiche Förderprogramme, um den Drop-out hochqualiizierter Frauen auf der Karriere leiter zu verhindern. Dennoch verändern sich die prozentualen Anteile von Frauen in ingenieurswissenschaftlichen Studiengängen und Berufen kaum. Aktuelle Studien belegen, dass vor allem kulturell bedingte Erwartungen und Einstellungen hierfür verantwortlich sind (vgl. Paulitz 2012).
Technikjournalismus
(2005)
Technikjournalismus
(2008)
Technikjournalismus ist eine noch recht junge Sparte im Fachjournalismus und umfasst die Berichterstattung über Themen aus den Gebieten, Bauen und Wohnen, Energie und Umwelt, Verkehr und Transport, Gewerbe und industrielle Produktion, Handel und Dienstleistungen sowie Information und Kommunikation.Dieser Band gibt zunächst einen Überblick über das Berufsbild des Technikjournalisten, den Gegenstand seiner Berichterstattung, die Recherche, typische Darstellungsformen und sprachliche Besonderheiten. Anschließend wird der Technikjournalismus in den verschiedenen Printmedien sowie im Hörfunk, Fernsehen und Internet vorgestellt; erfahrene Fachjournalisten wie namhafte Wissenschaftler beschreiben die medienspezifischen Besonderheiten, erläutern Spezifika von Recherche und Darstellung und vermitteln Handwerk und Orientierung. Auch das Verhältnis zur Wissenschaft und zu den Public Relations wird untersucht. Ausführungen über rechtliche und ethische Rahmenbedingungen runden das Buch ab.
This paper describes a project carried out at the Bonn-Rhein-Sieg University to teach low-power digital design structures in a laboratory. Low-power design has become one of the most essential constraints in digital systems, especially in portable devices. For this purpose, low-power design is a topic addressed in electrical and computer curricula, but it also requires applications in a laboratory. Therefore, this project focuses on preparing students for current trends in low-power design by examining realistic applications of its basic theories and principles, either hands-on or remotely. The laboratory's experiments use a field programmable gate array (FPGA) as a design platform for implementing the students' digital designs. This contribution reports on our first experiences in teaching low-power design in the lab. This paper focuses on the educational impact on students regarding the following: (1) overall objectives in the laboratory, (2) experimental exercises with low-power techniques, and (3) using educational FPGA boards and the EduPow board. The EduPow board is a developed hands-on board at the Bonn-Rhein-Sieg University that is relatively specific on using various signal image-processing applications to directly observe the power dissipation of a student's digital algorithm. Our assessment of the low-power design lab shows that the requirements and objectives of this project are fairly well satisfied. In addition, students' feedback indicates that using the EduPow board is more attractive and motivational in their work.
A basic understanding of technology is recognized as important knowledge even for students not connected with engineering and computer science. This paper shows that embedded system concepts can be taught in a technological literacy course. An embedded system teaching block that has been used in an electronics module for non-engineers is presented. It comprises 1 h of lecturing and 3 h of hands-on lab work. Feedback and evaluation show that students are able to gain a basic understanding of the topic even in such a limited time.
A basic understanding of technology is recognized as important knowledge for students outside engineering and computer science. This paper shows that also embedded system concepts can be taught in a technological literacy course. An embedded system teaching block is presented that has been used in an electronics module for non-engineers. It uses one hour of lecturing and three hours of hands-on lab work. Feedback during the lab and an evaluation show that students can gain basic understanding of the topic even in such a limited time.
Guest lecturers from a different country can be very beneficial as students get a broader view on a subject and learn about applications not common in their home country. However, the cost and time required for traveling is a drawback. This contribution describes the exchange of teaching content between Germany and Argentina based on an e-learning approach. Short lectures are recorded on video and supplement the teaching of the local lecturer. The teaching content addresses digital logic design with FPGAs and is targeted to advanced students. The video lectures introduce an image processing algorithm for driver assistance in modern cars, which is a motivating application for students. The remote-lab allows the students to perform lab exercises with real hardware. The topic of lane detection for driver assistance is a specific application. The video lectures correspond to 1 or 2 weeks of teaching and can be used as a supplement for an existing course on digital design, FPGAs or signal processing.
Die theoretische Regelungstechnik beschäftigt sich mit der Entwicklung interdisziplinär anwendbarer Methoden, während die praktische Regelungstechnik schwerpunktmäßig den Einsatz solcher Verfahren zum Ziel hat. Hierbei kommen jeweils Erkenntnisse angrenzender Wissensgebiete wie der Informatik, der Physik, der Mathematik etc. zum Tragen. Unter besonderer Berücksichtigung geltender Regelwerke behandelt das vorliegende Buch vorwiegend praktische Aspekte, wobei die Theorie als unverzichtbares Handwerkszeug in ihren Grundzügen dargestellt wird.
Synthesis of serving policies for objects flow in the system with refillable storage component
(2017)
This paper discusses the solution of the logistic problem occurred in a management system to supply fuel to inhabitants in the Arctic regions using bulk water transport delivery. The suggested mathematical model of a logistic scheme is designed in the form of uniprocessor system with refillable storage component providing a single stage service of deterministic objects flow. The task scheduling optimisation problem is formulated in the way where service policies are estimated by two independent minimised criteria. Proposed synthesis algorithm of Pareto-efficient service policies utilises a bicriterial approach of dynamic programming. The algorithm has been verified by the simulation example.
An evolving strategy for a multi-stage placement of charging stations for electrical cars is developed. Both an incremental as well as a decremental placement decomposition are evaluated on this Maximum Covering Location Problem. We show that an incremental Genetic Algorithm benefits from problem decomposition effects of having multiple stages and shows greedy behaviour.
We report on submillimetre bolometer observations of the isolated neutron star RX J1856.5−3754 using the Large Apex Bolometer Camera bolometer array on the Atacama Pathfinder Experiment telescope. No cold dust continuum emission peak at the position of RX J1856.5−3754 was detected. The 3σ flux density upper limit of 5 mJy translates into a cold dust mass limit of a few earth masses. We use the new submillimetre limit, together with a previously obtained H-band limit, to constrain the presence of a gaseous, circumpulsar disc. Adopting a simple irradiated disc model, we obtain a mass accretion limit of Graphic and a maximum outer disc radius of ∼1014 cm. By examining the projected proper motion of RX J1856.5−3754, we speculate about a possible encounter of the neutron star with a dense fragment of the CrA molecular cloud a few thousand years ago.
