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This work presents the first prototype of the Smart Pipe, a compact and intelligent wireless node hosting miniaturized sensors, embedded in a flange, for distributed and real-time monitoring of water contamination and for optimization of water treatment plants. Beyond pH and temperature, it features a low-cost and high-resolution (13 ppm, 11 ms response time) custom-designed 4-channel conductivity...
Graphlets represent small induced subgraphs and are becoming increasingly important for a variety of applications. Despite the importance of the local subgraph (graphlet) counting problem, existing work focuses mainly on counting graphlets globally over the entire graph. These global counts have been used for tasks such as graph classification as well as for understanding and summarizing the fundamental...
The proposed paper aims at defining a Building Management System (BMS) able to control energy flows inside a smart building integrated with various energy networks and Renewable Energy Resources (RES). The smart building envisaged in this work interacts with different energy carriers and is equipped with cogeneration and RES systems, as well as storage devices, which enable a certain degree of flexibility...
In wireless sensor networks, data collection (or gathering) is the task of transmitting rounds of measurements of physical phenomena from the sensor nodes to a sink node. We study how to increase the efficiency of data collection via supervised in-network classification of rounds of measurements. We assume that the end users of the data are interested only in rounds characterized by certain patterns...
From social science to biology, numerous applications often rely on graphlets for intuitive and meaningful characterization of networks at both the global macro-level as well as the local micro-level. While graphlets have witnessed a tremendous success and impact in a variety of domains, there has yet to be a fast and efficient approach for computing the frequencies of these subgraph patterns. However,...
Relational models for heterogeneous network data are becoming increasingly important for many real-world applications. However, existing relational learning approaches are not parallel, have scalability issues, and thus unable to handle large heterogeneous network data. In this paper, we propose Parallel Collective Matrix Factorization (PCMF) that serves as a fast and flexible framework for joint...
An experimental study is presented with the goal of investigating application of the forward modeling (FM) approach to target detection to hyperspectral images acquired over an urban scenario, where the effects of variability and uncertainty of atmospheric and illumination conditions are enhanced. The study exploits the availability of a new hyperspectral data set acquired in May 2013 over the city...
Roles represent node-level connectivity patterns such as star-center, star-edge nodes, near-cliques or nodes that act as bridges to different regions of the graph. Intuitively, two nodes belong to the same role if they are structurally similar. Roles have been mainly of interest to sociologists, but more recently, roles have become increasingly useful in other domains. Traditionally, the notion of...
This work proposes a method for blind equalization of possibly non-minimum phase channels using particular infinite impulse response (IIR) filters. In this context, the transfer function of the equalizer is represented by a linear combination of specific rational basis functions. This approach estimates separately the coefficients of the linear expansion and the poles of the rational basis functions...
The above-mentioned measurements, on crystals, photodetectors and optical couplings, performed at INFN and ENEA laboratories and irradiation facilities, represent a thorough study of options, that will allow the optimal solution for the upgrade of the Belle II end cap calorimeter to be found.
Autonomy and high accuracy are fundamental for underwater navigation. For this reason, new inertial algorithms are under intensive investigation to improve the performances. In this paper, we present the INS/DVL calibration algorithm developed by GEM Elettronica for underwater applications. With this procedure, we improve the sensor data fusion between our unit, Doppler Velocity Log (DVL) and the...
Nanoscale single-electron pumps could serve as the realization of a new quantum standard of electrical current. Here, a silicon quantum dot with tunable tunnel barriers is used as a source of quantized current. By controlling the electrostatic confinement of the dot via purposely engineered gate electrodes, we show that the robustness of the pumping mechanism can be dramatically enhanced and the detrimental...
In this work, we analyze the discussion threads from the forums of 60 Massive Open Online Courses (MOOCs) offered by Coursera and taught in 4 different languages. The types of interactions in such threads vary: there are discussions on close ended problems (e.g. solutions to assignments), open ended topics, course logistics, or just small talk among fellow students. We first study the evolution of...
Nanoscale single-electron pumps could serve as the realization of a new quantum standard of electrical current. Here, a silicon quantum dot with tunable tunnel barriers is used as a source of quantized current. By controlling the electrostatic confinement of the dot via purposely engineered gate electrodes, we show that the stability of the pumping mechanisms can be dramatically enhanced. Our pump...
We demonstrate that microwave photons can be used to remotely manipulate electron tunneling across a tunnel barrier at 4.2 K. A similar method is used to successfully modify the charges states of an electrically isolated doped silicon double quantum dot with potential coherence time of the order of a few µs.
In recent years there is a crescent interest for operating Unmanned Aircraft Systems (UAS) in new areas beyond the current reserved airspace. Such fact has forced regulatory organisations such as the ICAO (International Civil Aviation Organisation) to evaluate unmanned aircraft and to propose regulations for the expanded use of such aircraft. The definition of these regulations is a challenge for...
In quantum computation, the choice for the qubit implementation drives the method to be used to manipulate qubits and read out the computed state. For this, either electro-magnetic pulses or photons can be used. In semiconductors, qubit states in GaAs may be manipulated using a combination of surface acoustic waves in the GHz range while applying radiofrequency pulses [1] or static magnetic fields...
This paper introduces the design and experimental validation of a flexible robotized work cell for automated assembly of bends on top of a heat exchanger coil. This automatic system is based on the use of a specifically designed end-effector, able to store several bends together and to singularize and insert them in the tubes. In this way the pick-and-place operations that are typical in automated...
Wikipedia, the “free encyclopedia that anyone can edit”, has evolved substantially over the years according to the editors' needs for more coordination and better quality management. In particular, metadata in the form of “templates” added to pages have come to play a critical role, working in a sense like stigmergic “stigmata” or “signals” which editors use to orient the efforts of their colleagues...
The Mars Reconnaissance Orbiter's HiRISE (High Resolution Imaging Science Experiment) camera takes the largest images of the Martian surface. The image size is typically around 2.52 gigapixels. There is only a handful of software capable of doing a task as simple as reducing the size of the image by half and saving the result as a new image. The Scalable Image Processing Framework (SIPF) overcomes...
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