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Simulation is the approach most adopted to evaluate Vehicular Ad hoc Network (VANET) and Delay-Tolerant Network (DTN) solutions. Furthermore, the results’ reliability depends fundamentally on mobility models used to represent the real network topology with high fidelity. Usually, simulation tools use mobility traces to build the corresponding network topology based on existing contacts established between mobile nodes. However, the traces’ quality, in terms of spatial and temporal granularity, is a key factor that affects directly the network topology and, consequently, the evaluation results. In this work, we show that highly adopted existing real vehicular mobility traces present gaps, and propose a solution to fill those gaps, leading to more finegrained traces. We propose and evaluate a cluster-based solution using clustering algorithms to fill the gaps. We apply our solution to calibrate three existing, widely adopted taxi traces. The results reveal that indeed the gaps lead to network topologies that differ from reality, affecting directly the performance of the evaluation results. To contribute to the research community, the calibrated traces are publicly available to other researchers that can adopt them to improve their evaluation results.
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Vehicles with communication functionality are appearing on the roads and transition towards a fully connected vehicle environment will be gradual. Infra-vehicle communication can play a major role in promoting traffic performance in a partially connected vehicle environment. This paper addresses such a real traffic context to present a vehicle control system for eco-driving based on intersection vehicle cooperation. More specifically, the proposed system measures the state of the preceding vehicle by the on-board sensors, and receives information from upcoming intersection signal that exists within the communication range. Next, based on the predicted behavior of the preceding vehicle in a look forward horizon and traffic signal timing, the optimal acceleration of the vehicle is generated in a model predictive control framework. The velocity of the vehicle is dynamically tuned to reduce or avoid idling in red  signals either by speeding up or slowing down early, considering constraint imposed by any unconnected preceding vehicles. The proposed eco-driving system is evaluated through microscopic simulation.
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A new high-rise building features studio apartments as small as 260 square feet for renters who don’t want roomies
Apartments as small as 260 square feet might seem like a joke to some prospective renters, but in New York City, 60,000 people submitted applications for 14 affordable studios in Carmel Place, New York City’s first "micro-unit" apartment building.
Source: www.greenbuildingadvisor.com via viaexpo.com

Indirect energy consumption accounts for a large proportion of the all energy used in processes to make the final products and thus exerts huge pressure on environment. Structural analysis of indirect energy flow network is a prerequisite for solutions to energy related problems. The aim of this study is to reveal the structure of indirect energy flow network and its change from 1993 to 2007. To this end, we constructed three directed weighted IEFNs (indirect energy flow networks) with 28 sectors on the basis of three basic input–output tables from 1997, 2002, and 2007. By analyzing the clustering coefficient and the average path length of the networks, we obtained the small world nature of IEFNs. In the same study, we identified key sectors of the IEFNs on the basis of three centrality indicators from complex network theory, namely degree centrality, eigenvector centrality, and betweenness centrality. In addition, we analyzed the indirect energy flow paths in the network. Based on the knowledge of the structure of IEFNs and its trend, we discussed the possible policy implications.
Source: www.sciencedirect.com

Das Gewerk IT & TelCom von Alpiq InTec tritt ab sofort unter der neuen Bezeichnung ICT Services auf. Der moderne Begriff repräsentiert die Dienstleistungen von Alpiq InTec im Bereich Informations- und Kommunikationstechnik auf optimale Art und Weise.

ICT Services – so lautet die neue Bezeichnung der IT- und Telekommunikations-Abteilung von Alpiq InTec. «ICT Services» bietet dem technologischen Gewerk ein passendes, zeitgemässes Dach, unter dem die von Alpiq InTec angebotenen Dienstleistungen im Bereich Informations- und Kommunikationstechnik ihren Platz finden sowie den Kunden und Partnern verständlich vermittelt werden können.

Alpiq InTec gehört mit dem Gewerk ICT Services zu den führenden Anbietern im Bereich Informations- und Kommunikations-Lösungen. Durch den Einsatz modernster Technologien und mit kompetenten Dienstleistungen aus einer Hand sichern wir unseren Kunden einen substanziellen Mehrwert – in der ganzen Schweiz.
Quelle: www.alpiq-intec.ch

An unshaded south-facing roof is valuable real estate — too valuable to waste on solar thermal collectors Images:

Compared to a photovoltaic(PV) Generation of electricity directly from sunlight. A photovoltaic cell has no moving parts; electrons are energized by sunlight and result in current flow. system, a solar hot water system yields very little energy per dollar invested. I presented that argument in a 2012 article called "Solar Thermal Is Dead." Two years later, in 2014, an economic comparison between these two solar technologies showed a stronger tilt than ever before in favor of PVPhotovoltaics. Generation of electricity directly from sunlight. A photovoltaic (PV) cell has no moving parts; electrons are energized by sunlight and result in current flow, leading me to write a follow-up article called "Solar Thermal Is Really, Really Dead."
Source: viaexpo.com

Two new companies can help builders choose or order the right windows for Passivhaus and other high-performance projects.

Builders and designers looking for high-performance windows now have two more options: a New York-based distributor specializing in European windows suitable for PassivhausA residential building construction standard requiring very low levels of air leakage, very high levels of insulation, and windows with a very low U-factor. Developed in the early 1990s by Bo Adamson and Wolfgang Feist, the standard is now promoted by the Passivhaus Institut in Darmstadt, Germany.
Source: viaexpo.com

Bill Gates und 27 bekannte Unternehmer haben eine Initiative vorgestellt, mit der neuartige technologische Projekte im Kampf um den Klimawandel gefördert werden sollen. Der Milliardär und Microsoft-Gründer stellte am Montag an der Seite von US-Präsident Barack Obama und zahlreichen Regierungschefs aus rund 20 Staaten auf dem Pariser Klimagipfel die neue «Breakthrough Energy Coalition» vor. Neben IT-Größen wie Amazon-Chef Jeff Bezos, Facebook-Gründer Mark Zuckerberg, Ex-HP-Chefin Meg Whitman und dem SAP-Mitgründer Hase Plattner finden sich auch andere Top-Unternehmer auf der Liste, darunter Aliko Dangote, der reichste Geschäftsmann Afrikas, die Finanziers George Soros und John Doerr sowie der Virgin-Gründer Richard Branson. Sie wollen sich mit einem Teil ihres Vermögens an der Erforschung sauberer Energie beteiligen.
Quelle und gesamter Artikel: www.channelobserver.de

Zum Auftakt der UNO-Klimakonferenz in Paris haben sich mehr als 150 Staats- und Regierungschefs für den Kampf gegen die Erderwärmung stark gemacht. SRF-Sonderkorrespondent Jürg Brunner sieht positive Anzeichen in Richtung einer Einigung.
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