Globally Optimal Cell Tracking using Integer Programming

We propose a novel approach to automatically tracking cell populations in time-lapse images. To account for cell occlusions and overlaps, we introduce a robust method that generates an over-complete set of competing detection hypotheses. We then perform detection and tracking simultaneously on these hypotheses by solving to optimality an integer program with only one type of flow variables. This eliminates the need for heuristics to handle missed detections due to occlusions and complex morphology. We demonstrate the effectiveness of our approach on a range of challenging sequences consisting of clumped cells and show that it outperforms state-of-the-art techniques.Comment: Engin T\"uretken and Xinchao Wang contributed equally to this wor

New routes to cleanliness : nanocomposite coatings offer advantages over PTFE in food production

A new class of anti-adhesive coatings has been studied for potential use in industrial food production. They can be sprayed and cured at lower temperatures than current PTFE coatings. The polymer binder matrix incorporates perfluorinated comonomers and nanoscale hard particles. Polyurethane based systems gave the best abrasion and chemical resistance, but a polyimide-based system performed well in dry processing tests

Sofortbelastung von Implantaten am Beispiel des Frialoc®-System

In der Implantologie ist die Insertion von Implantaten fuer eine zeitnahe Belastung ein wichtiger Punkt. Sofort belastbare Implantate und eine zeitnahe Prothetik sind gefragt. 159 Implantate wurden bei 37 Patienten im Alter von 40 - 86 Jahren untersucht. Die Implantate waren im zahnlosen Unterkiefer inseriert worden und mit Steg und Prothese versorgt worden. Verschiedene Parameter wurden erhoben: Geschlecht, Alter, Tabakkonsum, Allgemeinzustand, Periotest-Werte, Sulkus-Fluid-Rate, Gingivaindex, Plaqueindex, Sondierungstiefen, Retraktionen und der Knochenabbau anhand der postoperativen Roentgenbilder im Vergleich zu denen bei der Befunderhebung. Die Studie ergab eine Ueberlebensrate von 98,74% bei 2 Explantationen. Die klinischen Parameter zeigten eine positive Tendenz. Bei der roentgenologischen Kontrolle zeigten die Implantate ein sehr stabiles Verhalten. Im Falle der explantierten Implantate kamen mehrere negative Faktoren zusammen. Die subjektive Zufriedenheit der Patienten lag hoch

Infinite-dimensional bilinear and stochastic balanced truncation with explicit error bounds

Abstract: Along the ideas of Curtain and Glover (in: Bart, Gohberg, Kaashoek (eds) Operator theory and systems, Birkhäuser, Boston, 1986), we extend the balanced truncation method for (infinite-dimensional) linear systems to arbitrary-dimensional bilinear and stochastic systems. In particular, we apply Hilbert space techniques used in many-body quantum mechanics to establish new fully explicit error bounds for the truncated system and prove convergence results. The functional analytic setting allows us to obtain mixed Hardy space error bounds for both finite-and infinite-dimensional systems, and it is then applied to the model reduction of stochastic evolution equations driven by Wiener noise

Measurement Based Identification of MPCs in an Urban Drone-To-Drone Propagation Scenario

The risk of mid-air collisions between flying drones has to be minimized to the greatest possible extent as it endangers people in the air and on the ground especially when being integrated into dense urban airspace. For a safe and efficient operation drones will need to exchange information in a robust and reliable manner and one essential part will be direct Droneto-Drone (D2D) communications. Especially, for dense drone scenarios in urban environments a communication system must cope with the specific underlying channel propagation conditions. In order to characterize the propagation effects between two moving drones in urban environments, we performed a channel sounding measurement campaign and presented an approach in previous work to localize the origin of the measured multipath components (MPCs) for a three-dimensional layout. In this work, we apply it on our measured flight scenarios in three different environments in order to identify the MPCs by assigning them to real-world objects. Furthermore, we describe first characteristics for them and show that the measured urban scenario consists of different kinds of components that must be considered in a future D2D channel model