Esslingen University of Applied Sciences

www.hs-esslingen.de
Esslingen, Germany

The Esslingen University of Applied science or Hochschule Esslingen und Hochschule für Sozialwesen ) is a University of applied science in Esslingen am Neckar, Germany. It has 11 faculties offering 25 bachelor study programs and 12 master programs. The University of Applied science' focus is on engineering, management, social science and health care and nursing science. It is ranked among the top Universities of Applied science in Germany with especially strong business administration, mechanical, electrical engineering, IT and Engineering with Business Studies programs. The university cooperates closely with the local economy and has partnerships with well-established companies such as Daimler, Porsche, Bosch, Festo , Eberspächer etc. which have major operations in the vicinity. Wikipedia.

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Theissler A.,Esslingen University of Applied Sciences
Knowledge-Based Systems | Year: 2017

The massive growth of data produced in the automotive industry by acquiring data during production and test of vehicles requires effective and intelligent ways of analysing these recordings. In order to detect potential faults, data from the in-vehicle network interconnecting vehicle subsystems is recorded during road trials. The complexity and volume of this data keeps increasing since the degree of interconnection between the vehicle subsystems and the amount of data transmitted over the in-vehicle network is augmented with each functionality added to modern vehicles. In this paper, an anomaly detection approach is proposed that (a) is capable of detecting faults of known and previously unknown fault types, (b) functions as an out-of-the-box approach not requiring the setting of expert-parameters and (c) is robust against different driving scenarios and fault types. To achieve this, an ensemble classifier is used consisting of two-class and one-class classifiers. Without modelling effort and user parameterisation the approach reports anomalies in the multivariate time series which point the expert to potential faults. The approach is validated on recordings from road trials and it could be shown that the ensemble-anomaly detector is robust against different driving scenarios and fault types. © 2017 Elsevier B.V.


Grant
Agency: European Commission | Branch: H2020 | Program: IA | Phase: GV-7-2014 | Award Amount: 27.80M | Year: 2015

The overall objective of HDGAS is to provide breakthroughs in LNG vehicle fuel systems, natural gas and dual fuel engine technologies as well as aftertreatment systems. The developed components and technologies will be integrated in up to three demonstration vehicles that are representative for long haul heavy duty vehicles in the 40 ton ranges. The demonstration vehicles will: a) comply with the Euro VI emission regulations b) meet at minimum 10% CO2 reduction compared to state of the art technology c) show a range before fueling of at least 800 km on natural gas; d) be competitive in terms of performance, engine life, cost of ownership, safety and comfort to 2013 best in class vehicles. Three HDGAS engine concepts/technology routes will be developed: - A low pressure direct injection spark ignited engine with a highly efficient EGR system, variable valve timing comprising a corona ignition system. With this engine a stoichiometric as well as a lean burn combustion approach will be developed. Target is to achieve 10% higher fuel-efficiency compared with state of the art technology - A low pressure port injected dual fuel engine, a combination of diffusive and Partially Premixed Compression Ignition (PPCI) combustion, variable lambda close loop control and active catalyst management. Target is to achieve > 10% GHG emissions reduction compared with state of the art technology at a Euro VI emission level, with peak substitution rates that are > 80%; - A high pressure gas direct injection diesel pilot ignition gas engine, that is based on a novel injector technology with a substitution rate > 90% of the diesel fuel. Target is to achieve same equivalent fuel consumption (< 215g/kWh) and 20% lower GHG emissions than the corresponding diesel engine. HDGAS will develop all key technologies up to TRL6 and TRL7 and HDGAS will also prepare a plan for a credible path to deliver the innovations to the market.


Grant
Agency: European Commission | Branch: FP7 | Program: JTI-CP-FCH | Phase: SP1-JTI-FCH.2011.1.5;SP1-JTI-FCH.2011.1.6 | Award Amount: 9.14M | Year: 2012

The main objective of the planned project IMPACT is to increase the life-time of fuel cells with membrane-electrode assemblies containing ultra low Pt-loading (< 0.2 mg cm-2) for automotive applications. The economic requirements to reduce Pt loading leads to the challenge to maintain durability and performance, an aspect which has not been addressed sufficiently in public projects and studies. A durability of 5000 h under dynamic operation conditions with ultra low loading is envisioned for automotive applications. IMPACT aims at improving significantly durability in the automotive application at reduced PGM loadings by material development and MEA development. Development ist performed on the main components of the cell, namely the membrane, the gas diffusion media and the electrodes. The basis for the durability is extensive testing at the industrial and research partner`s facilities under diverse and highly dynamic conditions and comprehensive and detailed analysis and evaluation of degradation processes and their importance for fuel cell performance loss. This analysis is utilized for the derivation of mitigation strategies by component modification and optimization of operation modes. The mitigation strategies are experimentally validated and consecutively lead to a demonstration of the improved durability in an predefined stack. IMPACT also aims at providing a cost analysis and an evaluation of the technical feasibility for large scale utilization of the project achievements. Recommendation and dissemination activities are planed within scientific workshops, publication of the results in scientific journals, and using project fact sheets.


Stangier U.,Goethe University Frankfurt | Schramm E.,Albert Ludwigs University of Freiburg | Heidenreich T.,Esslingen University of Applied Sciences | Berger M.,Albert Ludwigs University of Freiburg | Clark D.M.,King's College London
Archives of General Psychiatry | Year: 2011

Context: Cognitive therapy (CT) focuses on the modification of biased information processing and dysfunctional beliefs of social anxiety disorder (SAD). Interpersonal psychotherapy (IPT) aims to change problematic interpersonal behavior patterns thatmay have an important role in the maintenance of SAD. No direct comparisons of the treatments for SAD in an outpatient setting exist. Objective: To compare the efficacy of CT, IPT, and a waiting-list control (WLC) condition. Design: Randomized controlled trial. Setting: Two academic outpatient treatment sites. Patients: Of 254 potential participants screened, 117 had a primary diagnosis of SAD and were eligible for randomization; 106 participants completed the treatment or waiting phase. Interventions: Treatment comprised 16 individual sessions of either CT or IPT and 1 booster session. Twenty weeks after randomization, posttreatment assessment was conducted and participants in the WLC received 1 of the treatments. Main Outcome Measures: The primary outcome was treatment response on the Clinical Global Impression Improvement Scale as assessed by independent masked evaluators. The secondary outcome measures were independent assessor ratings using the Liebowitz Social Anxiety Scale, the Hamilton Rating Scale for Depression, and patient self-ratings of SAD symptoms. Results: At the posttreatment assessment, response rates were 65.8% for CT, 42.1% for IPT, and 7.3% for WLC. Regarding response rates and Liebowitz Social Anxiety Scale scores, CT performed significantly better than did IPT, and both treatments were superior to WLC. At 1-year follow-up, the differences between CT and IPT were largely maintained, with significantly higher response rates in the CT vs the IPT group (68.4% vs 31.6%) and better outcomes on the Liebowitz Social Anxiety Scale. No significant treatment X site interactions were noted. Conclusions: Cognitive therapy and IPT led to considerable improvements that were maintained 1 year after treatment; CT was more efficacious than was IPT in reducing social phobia symptoms. ©2011 American Medical Association. All rights reserved.


Michalak J.,Witten/Herdecke University | Schultze M.,Free University of Berlin | Heidenreich T.,Esslingen University of Applied Sciences | Schramm E.,Albert Ludwigs University of Freiburg
Journal of Consulting and Clinical Psychology | Year: 2015

Objective: Mindfulness-based cognitive therapy (MBCT) has recently been proposed as a treatment option for chronic depression. The cognitive behavioral analysis system of psychotherapy (CBASP) is the only approach specifically developed to date for the treatment of chronically depressed patients. The efficacy of MBCT plus treatment-as-usual (TAU), and CBASP (group version) plus TAU, was compared to TAU alone in a prospective, bicenter, randomized controlled trial. Method: One hundred and six patients with a current DSM-IV defined major depressive episode and persistent depressive symptoms for more than 2 years were randomized to TAU only (N = 35), or to TAU with additional 8-week group therapy of either 8 sessions of MBCT (n = 36) or CBASP (n = 35). The primary outcome measure was the Hamilton Depression Rating Scale (24-item HAM-D, Hamilton, 1967) at the end of treatment. Secondary outcome measures were the Beck Depression Inventory (BDI; Beck, Steer, & Brown, 1996) and measures of social functioning and quality of life. Results: In the overall sample as well as at 1 treatment site, MBCT was no more effective than TAU in reducing depressive symptoms, although it was significantly superior to TAU at the other treatment site. CBASP was significantly more effective than TAU in reducing depressive symptoms in the overall sample and at both treatment sites. Both treatments had only small to medium effects on social functioning and quality of life. Conclusions: Further studies should inquire whether the superiority of CBASP in this trial might be explained by the more active, problem-solving, and interpersonal focus of CBASP. © 2015 American Psychological Association.


Durr M.,University of Marburg | Durr M.,Esslingen University of Applied Sciences | Durr M.,Justus Liebig University | Hofer U.,University of Marburg
Progress in Surface Science | Year: 2013

Diffusion of atomic hydrogen on silicon serves as a model system for the investigation of thermally activated diffusion processes of covalently bound adsorbates on semiconductor surfaces. Over the past two decades, a detailed understanding of the hopping mechanisms for H/Si(0 0 1) and H/Si(1 1 1) has been obtained using a variety of experimental and theoretical methods. Hydrogen diffusion on silicon is in general characterized by energy barriers that are substantially larger than for adsorbate diffusion on metal surfaces, by the occurrence of different pathways on one surface, as well as by a strong participation of the underlying lattice in the hopping process. In the case of the flat Si(0 0 1) surface, three diffusion pathways were identified: site exchange within one Si dimer, hopping along dimer rows, and hopping across dimer rows, with barriers of 1.4, 1.7 and 2.4 eV, respectively. These barriers correlate with the distances of the involved adsorption sites of 2.4, 3.8 and 5.2. While hydrogen diffusion on Si(0 0 1) is strongly anisotropic at surface temperatures below 700 K, the measurement of high hopping rates by means of a combination of pulsed laser heating and scanning tunneling microscopy reveals similar jump frequencies around 108 s-1 at 1400 K. Diffusion across steps is found to occur with similar speed as diffusion along dimer rows. Hydrogen diffusion on Si(1 1 1) 7 × 7 involves 4.4-long jumps between restatom and adatom sites, accompanied by strong distortions of the adatom backbonds. Crossing the unit-cell boundaries via a 6.7-long migration pathway between two adatoms is the rate limiting process for diffusion on macroscopic length scales, which has an activation energy of 1.5 eV. © 2013 Elsevier Ltd. All rights reserved.


Grant
Agency: European Commission | Branch: FP7 | Program: JTI-CP-FCH | Phase: SP1-JTI-FCH.2013.2.2 | Award Amount: 3.66M | Year: 2014

In this project an electrochemical in-situ diagnostic tools for locally resolved measurements of current densities, which has been originally developed for application in polymer electrolyte membrane based fuel cells, will be adapted and integrated into water electrolysers. The tool will be applied to three different electrolysis technologies in a parallel effort: proton exchange membrane electrolysers, alkaline electrolysers and anion exchange membrane electrolysers. With this tool, which will include relevant sensors, the operating conditions will be monitored on-line. Test protocols for normal operation and accelerated ageing operation modes will be applied to the systems with the aim to identify critical operating conditions by means of the new integrated diagnostic tool. Parallel to these in-situ diagnostics, ex-situ investigations of electrolyser components, such as electrodes and membranes, will support the approach. Fresh and aged samples will be studied, in steady interaction with the in-situ diagnostics, to identify the mechanisms leading to performance losses and failure of components. These two approaches will be combined to find strategies and operation parameters to anticipate and to avoid hazardous operation modes. The possible use of electrolysers as decentralised storage systems for excess electric energy and thus providing a sustainable energy carrier in form of hydrogen will require a reliable operation under varying loads.


Grant
Agency: European Commission | Branch: FP7 | Program: JTI-CP-FCH | Phase: SP1-JTI-FCH.2011.1.8 | Award Amount: 6.31M | Year: 2012

PHAEDRUS addresses the complete scope and objectives of Topic SP1-JTI-FCH.2011.1.8. A new concept and new technologies for a hydrogen retail refuelling system are developed. The major objective is to develop and validate a new concept for 70 MPa hydrogen refuelling retail stations by showing the applicability of electrochemical hydrogen compression technology in combination with a PEM electrolyser, storage units and dispensing system. The use of electrochemical hydrogen compression technology is a step change in both the efficiency and cost of ownership of an integrated hydrogen refuelling system. The applicability will be demonstrated in a fuelling system producing 5 kg hydrogen per day, while a design is made for a fuelling system capable of producing 200 kg hydrogen per day. Safety aspects, efficiency and economic viability of the systems components will be analysed and validated as well. The targeted HRS infrastructure will have a modular dispensing capacity in the range of 50-200 kg per day, and will be fit for early network roll-out from 2015 onwards to 2020. Various consortium members are actively involved in working groups where relevant standards like SAE J2601, SAE J2799, CSA TIR 4.3, ISO TC 58/SC3 and ISO TC197 are being developed. An Advisory Board will review the progress with respect to international developments and will act as an interconnection to efforts in other Member States, Asia and the United States. The project is scheduled for 3 years and can be regarded as phase one of a two-step development. In the first phase technology will be developed, a complete Hydrogen Refuelling System design is made for 200 kg/day capacity, and validated on a 5 kg/day scale. Subsequently in phase two the technology will be demonstrated in a scalable 200 kg/day Hydrogen Refuelling System. The consortium encompasses the complete value-chain for an innovative hydrogen refuelling station; from a hydrogen producer to the automotive industry.


Korn O.,Esslingen University of Applied Sciences
EICS'12 - Proceedings of the 2012 ACM SIGCHI Symposium on Engineering Interactive Computing Systems | Year: 2012

This paper introduces an approach for implementing motivating mechanics from game design to production environments by integrating them in a new kind of computer-based assistive system. This process can be called "gamification". By using motion recognition, the work processes becomes transparent and can be visualized in realtime. This allows representing them as bricks in a "production game" which resembles the classic game Tetris. The aim is to achieve and sustain a mental state called "flow" resulting in increased motivation and better performance. Although the approach presented here primarily focuses on elderly and impaired workers, the enhanced assistive system or "wizard" can principally enrich work in every production environment. Copyright 2012 ACM.


Ammann U.,Esslingen University of Applied Sciences
Proceedings - 2015 IEEE International Symposium on Predictive Control of Electrical Drives and Power Electronics, PRECEDE 2015 | Year: 2015

This paper introduces so-called Assignment Figures as a tool to evaluate the impact of different cost functions on the resulting switching state patterns for predictive inverter control. These Assignment Figures are derived for two-level voltage source inverters and investigated for different cost function variants, including weighted switching frequency reduction and common-mode voltage reduction. It is shown how this graphical method can be used for selecting appropriate cost functions and for tuning weighting factors. © 2015 IEEE.

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