EES 2013 - Energy EcoSystems 2013: Leipzig, Germany, 23 - 24 September 2013; proceedings

Im Kontext der Energiewende durchlebt die Energiewirtschaft in Deutschland gegenwärtig einen tiefgreifenden Strukturwandel. Der Trend zur Fragmentierung und Dezentralisierung von Marktteilnehmern wird sich in den nächsten Jahren fortsetzen und weiter beschleunigen. Die Komplexität des Energiesystems wird weiter steigen. Gleichzeitig ergeben sich im Zuge dieser Entwicklung für energiewirtschaftliche Akteure (Erzeuger, Verbraucher, Netze, Energiemärkte und IuK-Technologien) vielfältige wirtschaftliche Herausforderungen und Entwicklungsperspektiven. Das Konzept 'Ecosystems' eröffnet innovative Perspektiven auf die zu erwartenden energiewirtschaftlichen Entwicklungen. Es strukturiert das komplexe Zusammenspiel der einzelnen Akteure und Teilsysteme mit der Zielsetzung, das Gesamtsystem sicherer, effizienter und umweltverträglicher zu gestalten. Im Fokus der Energy EcoSystems Conference 2013 stehen hierbei vier Betrachtungsebenen – die physikalische Ebene, die IKT-Ebene, die ökonomische Ebene und die soziokulturelle Ebene – sowie deren ebenenübergreifenden Wechselwirkungen. Mit den Sessions 'Energy EcoSystems heute und morgen', 'Technische Informationsbedarfe im Energy EcoSystem', 'Vermarktung und Verbrauch im Energy EcoSystem\\\', \\\'Erneuerbare Energien im Energy EcoSystem', 'Innovationen im Energy EcoSystem' und 'Quo vadis Energy EcoSystems?' liegen die Schwerpunkte der Konferenz in der Systemintegration von Erneuerbare-Energie-Anlagen, der Flexibilisierung des Verbrauchs auf physikalischer und ökonomischer Ebene, der Standardisierung von Datenformaten und Kommunikationsprotokollen, der Umsetzung steigender informationstechnischer Anforderungen sowie in Ansätzen zur Optimierung des Gesamtsystems. Dieser Tagungsband beinhaltet die wissenschaftlichen Beiträge der Scientific Tracks sowie ausgewählte Präsentationen der Industrie Tracks der Konferenz. Dr. Gerd Arnold, Dr. Stefan Kühne, Johannes Schmidt und Dr. Andrej Werner – das Konferenzkomitee – danken den Teilnehmern für die hochwertigen wissenschaftlichen sowie praxisrelevanten Beiträge und Diskussionen. Weiterhin möchte sich das Konferenzkomitee bei den Projektförderern Sächsische Aufbaubank (SAB), Bundesministerium für Bildung und Forschung (BMBF) sowie Bundesministerium für Wirtschaft und Technologie (BMWi) bedanken, welche durch unterschiedliche Förderprogramme die anstehenden Herausforderungen in der Energiewirtschaft und die Entwicklung hin zu einer erfolgreichen und exportierbaren Energiewende unterstützen. Besonderer Dank gilt den Sponsoren perdata Gesellschaft für Informationsverarbeitung mbH und GETEC net AG, durch deren Unterstützung viele Teilnehmer ihre Ergebnisse und Erkenntnisse auf der EcoSystems Conference 2013 vorstellen konnten. Das Konferenzkomitee dankt auch den Mitgliedern des Organisationskomitees –- Axel Hummel, Stefan Sprick und Robert Wehlitz –- für ihr persönliches Engagement und ihre tatkräftige operative Unterstützung. Weitere Informationen zur Energy EcoSystems Conference 2013 sowie die Folien der ReferentInnen finden Sie unter http://ees2013.infai.org. Alle Informationen zur nächsten Energy EcoSystems Conference werden unter http://ees.infai.org bekannt gegeben.:Sabine Wieland: Informationsarchitektur im Smart Meter Umfeld unter Berücksichtigung der aktuellen Netzsituation; Stefan Saatmann und Sandra Maeding: Energiewende und Regulierung — Wie werden Sonne und Wind im Stromnetz integriert und reguliert; Stefan Sprick, Tino Ryll, Kerstin Wurdinger, Andrej Werner, Bogdan Franczyk, Marcus Grieger, Jan Pfeifer und Robert Wehlitz: Regenerative Energien Management-Cockpit (REMC): Informationstransparenz in Energiewertschöpfungsnetzwerken; Hendrik Kondziella und Thomas Bruckner: Modellbasierte Investitionsentscheidungen in dezentralen Energiesystemen; Diana Böttger, Philipp Hanemann und Thomas Bruckner: Wirtschaftlichkeitsanalyse eines virtuellen Kraftwerks in Delitzsch innerhalb des EU-Projektes VIS NOVA; Robert Wehlitz, Andrej Werner, Marcus Grieger, Jan Pfeifer, Bogdan Franczyk, Stefan Sprick und Tino Ryll: Smart Meter Installation Management — Prototypgestützte Digitalisierung von Smart Meter Montageprozessen; Marcus Grieger, Andrej Werner, Robert Wehlitz, Jan Pfeifer, Stefan Sprick, Tino Ryll und Bogdan Franczyk: How ICT Could Accelerate the Smart Meter Installation Process — An Assessment of Rollout Experiences; Heiko Mevert: Smart-Metering: Theorie und Praxis; Hartmut Entrup: Anforderungen an IT-Systeme im Zuge der Einführung intelligenter Messsysteme; Martin Winter: Dynamische Anbindung dezentraler Energieanlagen mit IEC 61850; Olaf Krietsch: Verbindungen zwischen SRL-Anbieter und Übertragungsnetzbetreibern gemäß 'Mindestanforderungen an die Informationstechnik für die Erbringung von Sekundärregelleistung'; Sabrina Schlammerl: Innovative Services in der Windenergie: Der Einsatz von RDS-PP und dessen Bedeutung für das Life Cycle Management; Christian Schweitzer: Lebenslaufakte: Ganzheitlicher Ansatz für einen gesicherten Anlagenbetrieb; Rene Baumann: Vermarktungskonzepte für dezentrale Anlagen; Heike Diebler und Lutz Maicher: Energiekosten sparen durch Energetische Transparenz in der verarbeitenden Industrie – ein Praxisbericht; Philipp Guttenberg, Heinrich Hördegen: Betriebsoptimierung für Energiespeicher durch Energieflussmodellierung; Winfried Damm: Regenerative Energieversorgung einer Großstadt, Stadtwerke Leipzig; Uwe Härling: Herausforderungen der Energiewende für das Verteilnetz der MITNETZ STROM; Matthias Müller-Mienack: Integration Erneuerbarer Energien — Notwendige Werkzeuge für den ÜNB; Martin Jarosch-Mitko: Eine Integrationsplattform für Erneuerbare-Energie-Anlagen; Stephan Witt: Energiesysteme als Business Ecosystems – Bedeutung für die strategische Planung und das Innovationsmanagement am Beispiel dezentraler Netzsteuerungsparadigmen; Thomas Bruckner: Die Energiewende in Deutschland – Technologische Lösungen und energiewirtschaftliche Herausforderunge

Scientific modeling of Optical 3D Measuring Devices based on GPU-accelerated Ray Tracing using the NVIDIA OptiX Engine

Scientific optical 3D modeling requires the possibility to implement highly flexible and customizable mathematical models as well as high computing power. However, established ray tracing software for optical design and modeling purposes often has limitations in terms of access to underlying mathematical models and the possibility of accelerating the mostly CPU-based computation. To address these limitations, we propose the use of NVIDIA's OptiX Ray Tracing Engine as a highly flexible and high-performing alternative. OptiX offers a highly customizable ray tracing framework with onboard GPU support for parallel computing, as well as access to optimized ray tracing algorithms for accelerated computation. To demonstrate the capabilities of our approach, a realistic focus variation instrument is modeled, describing optical instrument components (light sources, lenses, detector, etc.) as well as the measuring sample surface mathematically or as meshed files. Using this focus variation instrument model, exemplary virtual measurements of arbitrary and standardized sample surfaces are carried out, generating image stacks of more than 100 images and tracing more than 1E9 light rays per image. The performance and accuracy of the simulations are qualitatively evaluated, and virtually generated detector images are compared with images acquired by a respective physical measuring device.Comment: conferenc

Effect of two different neuroprotection systems on microembolization during carotid artery stenting

ObjectivesThis study sought to compare the efficacy of two different cerebral protection systems for the prevention of embolization during carotid artery stenting (CAS) using a transcranial Doppler (TCD) monitoring with the detection of microembolic signals (MES).BackgroundDespite the introduction of cerebral protection systems, neurologic complications during CAS cannot completely be prevented. Transcranial Doppler and detection of MES may aid in assessing the efficacy of different neuroprotection systems.MethodsA total of 42 patients with internal carotid artery stenoses were treated by CAS using either a filter (E.P.I. FilterWire, Boston Scientific Corp., Santa Clara, California) (n = 21) or a proximal endovascular clamping device (MO.MA system, Invatec s.r.l., Roncadelle, Italy) (n = 21). Microembolic signal counts were compared during five phases: placement of the protection device, passage of the stenosis, stent deployment, balloon dilation, and retrieval of the protection device.ResultsThere were no significant differences in clinical or angiographic outcomes between the two groups. Compared to the filter device, the MO.MA system significantly reduced MES counts during the procedural phases of wire passage of the stenosis, stent deployment, balloon dilation, and in total (MES counts for the filter device were 25 ± 22, 73 ± 49, 70 ± 31, and 196 ± 84 during the three phases and in total, MES counts for the MO.MA system were 1.8 ± 3.2, 11 ± 19, 12 ± 21, and 57 ± 41, respectively; p < 0.0001).ConclusionsIn comparison to a filter device the MO.MA system led to significantly lower MES counts during CAS. The detection of MES by TCD may facilitate the evaluation and comparison of different neuroprotection systems

Bloodstream Infections Caused by Small-Colony Variants of Coagulase-Negative Staphylococci Following Pacemaker Implantation

Small-colony variants (SCVs) of Staphylococcus aureus cause persistent and relapsing infections. Relatively little is known regarding infections caused by SCVs of coagulase-negative staphylococci. We report two cases of pacemaker electrode infections due to SCVs of Staphylococcus epidermidis and Staphylococcus capitis. Sequence analysis of a portion of the 16S rRNA gene (16S rDNA) confirmed the identity of the staphylococcal species as S. capitis and S. epidermidis. Isolates from cultures of blood obtained over at least a 2-week interval were compared by pulsed-field gel electrophoresis and found to be clonal even though the colony morphology was very different. Analysis for auxotrophism revealed hemin dependencies for all isolated SCVs. The two cases have several clinical and laboratory characteristics (which are also seen with S. aureus SCV infections) and strongly suggest that SCVs of coagulase-negative staphylococci must be actively sought, because they grow very slowly and can be easily misse

Observations of atmospheric variability and soil exhalation rate of 222Radon at a Russian forest site: Technical approach and deployment for boundary layer studies

A monitor for continuous observations of the atmospheric 222Rn daughter activity has been improved and successfully implemented in a field study at a Russian site (Fyodorovskoye Forest Reserve). The alpha-activity of the short-lived 222Rn and 220Rn (212Pb) decay products, which are attached to aerosols, is accumulated on a quartz aerosol filter and assayed on-line by alpha-spectroscopy. The alpha-activity from the 212Pb daughters is determined by spectroscopy and corrected for. This monitor is suitable to measure 222Rn activities at hourly resolution down to 0.5 Bq m-3 with an uncertainty well below ±20%. The prototype of this monitor is run in Heidelberg on the roof of the Institute’s building about 20 m above ground. For this site, the atmospheric radioactive disequilibrium was determined between the 222Rn daughter 214Po and 222Rn, which has to be known to derive the atmospheric 222Rn activity with the static filter method. We derived a mean disequilibrium 214Po/222Rn = 0.704±0.081 for various meteorological conditions through parallel 222Rn gas measurements with a slow pulse ionisation chamber. At the Russian field site, continuous activity observations were performed from July 1998 until July 2000 with half a year interruption in summer/fall 1999. During intensive campaigns, a second monitor was installed at Fyodorovskoye at 15.6 m (July/August 1998), and at 1.8 m (July/August 1999 and October 1999) above ground. Pronounced diurnal cycles of the 222Rn daughter activity were observed at all sites, particularly during summer when the vertical mixing conditions in the atmospheric surface layer vary strongly between day and night. The lower envelope of the continuous measurements at Fyodorovskoye and at Heidelberg changes on synoptic time scales by a factor of 4 to 10 due to long-range transport changes between continental to more maritime situations. Generally, the 222Rn activity at 26.3 m height at Fyodorovskoye is lower by a factor of 2 to 3 compared to Heidelberg at 20 m above ground. This unexpected result is due to considerably lower 222Rn exhalation rates from the soils measured in the footprint of the Fyodorovskoye Forest tower compared to Heidelberg. With the inverted chamber technique 222Rn exhalation rates in the range of 3.3 to 7.9 Bq m-2 h-1 were determined at Fyodorovskoye for summer 1998 and autumn 1999 (wet conditions with water table depths between 5 and 70 cm). Only during the very dry summer in 1999 the mean 222Rn exhalation rate increased by about a factor of five. All measured exhalation rates at the Fyodorovskoye Forest are considerably smaller by a factor of 2-10 compared to what we observe in the vicinity of Heidelberg (ca. 50 to 60 Bq m-2 h-1) and generally in Western Europe

Evaluation of the Biodegradable Peripheral Igaki-Tamai Stent in the Treatment of De Novo Lesions in the Superficial Femoral Artery

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Improving protein extraction and separation methods for investigating the metaproteome of anaerobic benzene communities within sediments

BTEX compounds such as benzene are frequent soil and groundwater contaminants that are easily biodegraded under oxic conditions by bacteria. In contrast, benzene is rather recalcitrant under anaerobic conditions. The analysis of anoxic degradation is often hampered by difficult sampling conditions, limited amounts of biomass and interference of matrix compounds with proteomic approaches. In order to improve the procedure for protein extraction we established a scheme consisting of the following steps: dissociation of cells from lava granules, cell lysis by ultrasonication and purification of proteins by phenol extraction. The 2D-gels revealed a resolution of about 240 proteins spots and the spot patterns showed strong matrix dependence, but still differences were detectable between the metaproteomes obtained after growth on benzene and benzoate. Using direct data base search as well as de novo sequencing approaches we were able to identify several proteins. An enoyl-CoA hydratase with cross species homology to Azoarcus evansii, is known to be involved in the anoxic degradation of xenobiotics. Thereby the identification confirmed that this procedure has the capacity to analyse the metaproteome of an anoxic living microbial community

First Experience With The GoBack-Catheter For Successful Crossing of Complex Chronic Total Occlusions in Lower Limb Arteries

Purpose: To evaluate the use of the GoBack-catheter (Upstream Peripheral Technologies) in complex revascularizations in lower limb arteries. Materials and Methods: In this retrospective single-center study, the results of the first 100 consecutive patients including 101 limb-revascularizations, performed between May 2018 and July 2020 with the study device, were analyzed. In all cases, guidewire-crossing failed, and all lesions were chronic total occlusions (CTO), either de novo, reocclusions, or in-stent reocclusions. Successful crossing was defined as passing the CTO using the study device. Patency at discharge and after 30 days was defined as less than 50% restenosis on duplex sonography, without target lesion revascularization. Results: Median lesion length was 24 cm and 38 patients (37.6%) had a calcium grading according to the peripheral arterial calcium scoring system (PACSS) of 4 or 5. In 20.8% of patients, an occluded stent was treated. CTOs involved the femoropopliteal segment in 91.1%, iliac arteries in 5.9%, and tibial arteries in 7.9%. The GoBackcatheter was employed for entering into or crossing through parts or the full length of a CTO or an occluded stent as well as for re-entering into the true lumen after subintimal crossing. The device was used via contralateral and ipsilateral antegrade as well as retrograde access with an overall technical success rate of 92.1%. In 3 patients minor bleeding occurred at the crossing or re-entry site, which were managed conservatively. Thirty-day adverse limb events comprised minor amputations in 4 patients (4.0%), 1 major amputation (1.0%), and reocclusions in 7 limbs (6.9%). Conclusion: The new GoBack-catheter offers versatile endovascular applicability for complex CTO recanalization in a broad range of peripheral vascular interventions with a high technical success and low complication rate

Impact on outcome of different types of carotid stent: Results from the European Registry of Carotid Artery Stenting

AIMS: Conflicting data exist on the impact on outcome of the use of different stent types during carotid artery stenting (CAS). The aim of this study was to evaluate clinical outcomes according to different carotid stent design among the population of the European Registry of Carotid Artery Stenting (ERCAS). METHODS AND RESULTS: The present study was conducted in 1,604 patients who underwent neuroprotected CAS in ERCAS. All types of commercially available carotid stent were used. Open-cell design stents were classified according to free cell area into 7.5 mm2. A total of 713 closed-cell, 456 hybrid-cell, 238 7.5 mm2 open-cell stents were implanted. Overall, the 30-day stroke and death rate was 1.37%. At 30 days, 19 strokes occurred (1.18%): eight in the group of patients treated with a closed-cell (1.12%), two in those with a hybrid-cell (0.44%), three in those with a 7.5 mm2 open-cell stent (3.05%) (p=0.045). CONCLUSIONS: Data of the present study suggest that, in the setting of neuroprotected CAS performed in high-volume centres by properly trained operators, the use of an open-cell design stent with a free cell area >7.5 mm2 may be associated with an increased 30-day stroke risk