Kneist W.,Johannes Gutenberg University Mainz |
Kauff D.W.,Johannes Gutenberg University Mainz |
Rahimi Nedjat R.K.,Johannes Gutenberg University Mainz |
Rink A.D.,Johannes Gutenberg University Mainz |
And 6 more authors.
International Journal of Colorectal Disease | Year: 2010
Purpose: The aim of this animal study was to investigate the effect of intraoperative pelvic nerve stimulation on internal anal sphincter electromyographic signals in order to evaluate its possible use for neuromonitoring during nerve-sparing pelvic surgery. Methods: Eight pigs underwent low anterior rectal resection. The intersphincteric space was exposed, and the internal (IAS) and external anal sphincter (EAS) were identified. Electromyography of both sphincters was performed with bipolar needle electrodes. Intermittent bipolar electric stimulation of the inferior hypogastric plexus and the pelvic splanchnic nerves was carried out bilaterally. The recorded signals were analyzed in its frequency spectrum. Results: In all animals, electromyographic recordings of IAS and EAS were successful. Intraoperative nerve stimulation resulted in a sudden amplitude increase in the time-based electromyographic signals of IAS (1.0 (0.5-9.0) μV vs. 4.0 (1.0-113.0) μV) and EAS (p∈<∈0.001). The frequency spectrum of IAS in the resting state ranged from 0.15 to 5 Hz with highest activity in median at 0.77 Hz (46 cycles/min). Pelvic nerve stimulation resulted in an extended spectrum ranging from 0.15 to 20 Hz. EAS signals showed higher frequencies mainly in a range of 50 to 350 Hz. However, after muscle relaxation with pancuronium bromide, only the low frequency spectrum of the IAS signals was still present. Conclusions: Intraoperative verification of IAS function by stimulation of pelvic autonomic nerves is possible. The IAS electromyographic response could be used to monitor pelvic autonomic nerve preservation. © 2010 Springer-Verlag.
Sartor J.,Fachhochschule Trier |
Zimmer K.-H.,Ehemals Wasserwirtschaftsverwaltung Rheinland Pfalz |
Busch N.,Bundesanstalt fur Gewasserkunde Koblenz
Wasser und Abfall | Year: 2010
Principally, the measurement of more than 900 high-water marking the historical events in the Mosel River Valley were reconstructed and made plausible by means of hydraulic calculations as well as historical reports. The database for statistical analysis was expanded. The flooding hazard can be better clarified for the potentially affected riverbank residents.
Brendel L.,University of Duisburg - Essen |
Torok J.,University of Duisburg - Essen |
Kirsch R.,Fachhochschule Trier |
Brockel U.,Fachhochschule Trier
Granular Matter | Year: 2011
We present a visco-elastic coupling model between caked spheres, suitable for Distinct Element Method simulations, which incorporates the different loading mechanisms (tension, shear, bending, torsion) in a combined manner and allows for a derivation of elastic and failure properties on a common basis. In pull, shear, and torsion failure tests with agglomerates of up to 10.000 particles, we compare the failure criterion to different approximative variants of it, with respect to accuracy and computational cost. The failure of the agglomerates, which behave according to elastic parameters derived from the contact elasticity, gives also insight into the relative relevance of the different load modes. © Springer-Verlag 2011.
Agency: European Commission | Branch: FP7 | Program: MC-IRSES | Phase: FP7-PEOPLE-2012-IRSES | Award Amount: 419.50K | Year: 2013
Environmental pollution is a global problem. Unsustainable production of goods, improper treatment of the waste, emissions to air and water, and inadequate legislation causes growing problems to human beings and nature. The urgent need for reducing environmental load coming from industry, agriculture and communities demands for novel ways of thinking. NO-WASTE collaboration will attack to this current problem by developing environmentally sound and sustainable possibilities to utilize and valorise different wastes and emissions. The aim is to create valuable new products and renewable energy to minimize the waste as well as emissions to air and water. As a tool to achieve this aim, catalysis plays an important role. In addition, the sustainability of the each planned utilisation case will be evaluated. The cases are related to hydrogen and synthesis gas production from waste, utilization of CO2, organic gases and agricultural waste, and development of new products created by optimized hydrothermal carbonization process. This ambitious aim and wide operational area demands for extensive collaboration, but also forms a great possibility to widen the network after NO-WASTE. The exchange months during this four years program grows up to 205 months and the planned transnational network brings together experts of different disciplines from Finland, France, Germany, Brazil, Morocco and China. During the collaboration a solid basis for further collaboration will be established.
Agency: European Commission | Branch: FP7 | Program: CSA-SA | Phase: FP7-PEOPLE-2012-NIGHT | Award Amount: 257.31K | Year: 2012
As the City of Trier is the economic and cultural centre of the greater region, the first Researchers Night in Trier will take place in the City with good infrastructural connections to the neighbouring countries of Luxembourg, Belgium and France. In the Researchers Night, science meets the city of Trier and their institutions in 9 different fields: (1) culture, (2) Design, (3) Crime, (4) Economy (especially with regard to local and regional needs), (5) History, (6) Technology, (7) Ecology, (8) Health and (9) Europe. In the focus of all activities is the general public. There will be science for young and old, regardless of their scientific background. A variety of different activity types will be made available to the public: interactive, accessible and accompanied hands-on experiments, shows and demonstrations, bridges to other domains like art, literature and music, visits to unusual places and guided tours, exhibitions, touch science experiments, lectures presentations with common interest subjects, science cafs, presentation of researchers hobbies (e.g. Profs on Air), challenges with researchers, Science Slam, Childrens University etc. Activities during the researchers night will take place at various venues all over the city like museums, schools and different public squares outside. To maximize the benefit the tracking will allow the attendance of different events at different times. Even the time you need from A to B may be filled by special academic offers, e.g. a lecture in a public bus or an academic walk through the city. Circuits will help undecided visitors and ensure balanced participation in activities. For this reason coping with plenty should be easy to manage for all visitors. The aims of the Researchers night in Trier consists of continuing to tackle the existing stereotypes about researchers and the profession, to have the public at large better understand the central role of researchers and the key benefits they bring to society
Agency: European Commission | Branch: FP7 | Program: CP | Phase: ENERGY-2007-8.2-01 | Award Amount: 5.21M | Year: 2008
The aim of this proposal is to demonstrate high-efficient polygeneration of electricity, heat, solid fuels and high-value compost/ fertilisers from sewage sludge and greenery waste mixed to biomass residues, thereby offering a new, safe, environmentally friendly and cost-effective path for the disposal of sewage sludge, maximising energy output, greenhouse gas reduction, cost-effectiveness and new chances for SME. Compared to the existing routes of sewage sludge treatment, the proposed concept allows achieving a very high overall energy efficiency by (1) use of low-temperature environmental heat and heat from the co-composting process for drying sewage sludge thereby replacing high temperature heat from a combustion process, (2) a highly efficient gasification process, (3) saving of transport energy due to a better overall material flow management. Thus, the concept brings down disposal costs of sewage sludge. The polygeneration demonstration plant will be set up on an existing compost production facility. The latter will be able to process larger amounts of sewage sludge than at present, to produce less but higher quality compost as well as pellets and/or briquettes as storable substitute fuel and to deliver electricity to the grid. Heat will be used on site for drying processes and for a district heating grid of a neighbouring industrial park. CO2 emissions are reduced by replacement of fossil fuels and directly in the composting process. Minerals and nutrients will be recovered from the ash and used to enhance the fertilising value of the compost after removal of heavy metals and other harmful fractions. 5 out of the 8 consortium partners are SME. The exploitation plan includes the creation of a two further SME for heat delivery and worldwide planning and marketing of similar plants. Replication of the concept in the 3,000 compost plants in the EU would allow additional generation of at least 56 TWh of electricity, heat and solid fuels.
Fachhochschule Trier and University of Cologne | Date: 2010-10-05
A process for operating an internal combustion engine or a nozzle includes producing a fuel mixture in-situ. The fuel mixture consists of a polar component A, a nonpolar fuel component B, an amphiphilic component C, and an auxiliary component D. The fuel mixture is produced in a high-pressure region of an injection system of an internal combustion engine or of a nozzle within 10 seconds of an injection operation. The fuel mixture is injected into the internal combustion engine or the nozzle. A pressure is in a range of from 100 to 4,000 bar.
Tonkin C.,Clemson University |
Duchowski A.T.,Clemson University |
Kahue J.,Clemson University |
Schiffgens P.,Fachhochschule Trier |
Rischner F.,Fachhochschule Trier
PETMEI'11 - Proceedings of the 1st International Workshop on Pervasive Eye Tracking and Mobile Eye-Based Interaction | Year: 2011
Consumers' visual behavior is compared when shopping for a product on simulated shelving displays of two different sizes: a 11.5 ft. projection canvas and a 15.4 in. laptop screen. Results are compared with search times obtained over virtual (projected) and physical shelves, where recorded search times indicate a tendency toward improved performance with larger displays. Implications for pervasive eye tracking systems indicate consideration of larger, realistic environments. © 2011 ACM.
Pfrang A.,European Commission |
Didas S.,Fachhochschule Trier |
Tsotridis G.,European Commission
Journal of Power Sources | Year: 2013
In proton exchange membrane fuel cells (PEMFCs), gas diffusion layers (GDL) are crucial for fuel cell performance and more specifically for the removal of the product water where the microporous layer (MPL), as one component of the GDL, plays a significant rule. X-ray computed tomography was applied for the 3D imaging of a gas diffusion layer-Sigracet GDL 35 BC-at sub-μm resolution to improve the knowledge of its 3D microstructure. The study was focused on the identification of the MPL material within the GDL. A segmentation based on a simple gray level thresholding is not appropriate as the gray level ranges for air, carbon fibres and MPL overlap. Consequently, more sophisticated approaches for segmentation were tested; diffusion filtering followed by a gray level thresholding gave the best results. Using this approach, fractures in the MPL layer could be visualised and it was also shown that the MPL can penetrate far into the GDL. © 2013 Elsevier B.V. All rights reserved.