4,069 research outputs found
Data set for anomaly detection on a HPC system
No full text<p>This data set contains the data collected on the DAVIDE HPC system (CINECA & E4 & University of Bologna, Bologna, Italy) in the period March-May 2018.</p>
<p>The data set has been used to train a autoencoder-based model to automatically detect anomalies in a semi-supervised fashion, on a real HPC system.</p>
<p>This work is described in:</p>
<p>1) "Anomaly Detection using Autoencoders in High Performance Computing Systems", <a href="https://arxiv.org/search/cs?searchtype=author&query=Borghesi%2C+A">Andrea Borghesi</a>, <a href="https://arxiv.org/search/cs?searchtype=author&query=Bartolini%2C+A">Andrea Bartolini</a>, <a href="https://arxiv.org/search/cs?searchtype=author&query=Lombardi%2C+M">Michele Lombardi</a>, <a href="https://arxiv.org/search/cs?searchtype=author&query=Milano%2C+M">Michela Milano</a>, <a href="https://arxiv.org/search/cs?searchtype=author&query=Benini%2C+L">Luca Benini,</a> IAAI19 (proceedings in process) -- https://arxiv.org/abs/1902.08447</p>
<p>2) "Online Anomaly Detection in HPC Systems", <a href="https://arxiv.org/search/cs?searchtype=author&query=Borghesi%2C+A">Andrea Borghesi</a>, <a href="https://arxiv.org/search/cs?searchtype=author&query=Libri%2C+A">Antonio Libri</a>, <a href="https://arxiv.org/search/cs?searchtype=author&query=Benini%2C+L">Luca Benini</a>, <a href="https://arxiv.org/search/cs?searchtype=author&query=Bartolini%2C+A">Andrea Bartolini, </a>AICAS19 (proceedings in process) -- https://arxiv.org/abs/1811.05269</p>
<p>See the git repository for usage examples & details --> https://github.com/AndreaBorghesi/anomaly_detection_HPC</p>
Matrix of genus occurrences for the GFRI and closeness index analysis of Bartolini-Lucenti et al.
No full textMatrix of genus occurrences for the GFRI and closeness index analysis of Bartolini-Lucenti et al. "The Montopoli site, a reference Local Fauna in the Pliocene and Pleistocene European Large Mammals Biochronology, first discovered by Giovanni Capellini (1833-1922)"published on the Bollettino della Società Paleontologica Italian
sj-pdf-1-opp-10.1177_1078155220914704 - Supplemental material for Posterior reversible encephalopathy syndrome: A rare neurotoxicity after capecitabine
No full textSupplemental material, sj-pdf-1-opp-10.1177_1078155220914704 for Posterior reversible encephalopathy syndrome: A rare neurotoxicity after capecitabine by Manlio Monti, Domenico Barone, Elena Amadori, Giulia Bartolini, Silvia Ruscelli and Giovanni Luca Frassineti in Journal of Oncology Pharmacy Practice</p
An assessment of the impact of possible CAP reform scenarios on Romanian agriculture
Full text linkUsing a simplified model, with key-variable the prices of two different possible scenarios of CAP reform after 2013 (moderate and radical), this paper present a comparison between the price effects of implementation of each reform scenario at 2015 horizon on Romanian agriculture. This short analysis shows that, under the presented hypotheses, the net welfare effect, due to the price changes, for the selected products, is positive in both reform scenarios, yet greater in the case of the radical reform. Integrated in the large context of Romanian development, it seems that the influence of CAP reform upon agriculture and rural areas will be most likely a gradual one: an interpenetration between the two scenarios is foreseeable, starting with the moderate reform that will dominate the period around 2013, the reform measures acquiring a more radical character afterwards.CAP reform, Romania, welfare effects, Agricultural and Food Policy,
Rich, Sturmian, and trapezoidal words
Full text linkIn this paper we explore various interconnections between rich words, Sturmian words, and trapezoidal words. Rich words, first introduced by the second and third authors together with J. Justin and S. Widmer, constitute a new class of finite and infinite words characterized by having the maximal number of palindromic factors. Every finite Sturmian word is rich, but not conversely. Trapezoidal words were first introduced by the first author in studying the behavior of the subword complexity of finite Sturmian words. Unfortunately this property does not characterize finite Sturmian words. In this note we show that the only trapezoidal palindromes are Sturmian. More generally we show that Sturmian palindromes can be characterized either in terms of their subword complexity (the trapezoidal property) or in terms of their palindromic complexity. We also obtain a similar characterization of rich palindromes in terms of a relation between palindromic complexity and subword complexity
Distributed Stirling Engines for Pipeline Corrosion Protection
No full textOil or gas transportation requires the use of very long pipelines from the source of extraction to the main distribution grids. However, due to the properties of the inner fluids and to the differing environmental conditions, these pipelines are particularly prone to corrosion. To guarantee the longevity of pipelines, protective coatings and/or anodic or cathodic protection are commonly used. In conjunction with protective coatings, cathodic protection is often considered the wisest solution and is therefore widely adopted. In remote areas, where power supply is not easily available from the grid, power units are distributed along the course of the pipeline to overcome this shortage. Thanks to their impressive operating longevity without maintenance, off-grid Stirling engines are well-suited to this purpose as they can be used as power generators in remote areas where operat/are occasional.
A 1kWe Stirling engine has been designed to ensure the protection of over 5 kilometers of pipeline length, conditioning the corrosion protection control units and powering the SCADA systems.
Market analysis has shown very good opportunities for off grid configuration Stirling engines in the oil and gas sector, thus extending their current application in the household sector as micro combined heat and power systems.
According to a low profile estimate, protection of 2000 km of pipeline length can be ensured through the use of Stirling engines, /promising an important economic profit
Onboard Hybrid Propulsion and Sewage Treatment System Powered by a Stirling Engine Unit
No full textAt present, boats have to comply with very strict environmental regulations on emission production and sewage disposal. In the near future, new environmental policies on reduction of water pollution will also affect sailing boats. To reach environmental targets, a few models of new boats on the market are equipped with hybrid propulsion systems in which an electric generator is combined with a diesel engine. The electric generator, driven by the diesel engine, charges a bank of batteries which in turn powers an electric motor. The electric motor can operate in parallel with the main propulsion engine to provide more power output or on its own, when a quieter and more fuel-efficient operating performance is required during idling or docking.
In this paper a Stirling engine is considered for the onboard application. The main advantage is that a Stirling engine can run continuously to charge the bank of batteries in the hybrid propulsion system or to supply power on request for onboard appliances, all whilst producing a very little noise. In addition, the heat discharged by the cooling system of the engine can be utilized for onboard sewage treatment. New environmental regulations limit the sewage disposal at ports thus making it necessary to store and treat sewage during navigation. In order to reduce sewage disposal, the engine’s thermal output is used to aid evaporation thereby reducing the quantity of waste disposed.
In this work, the authors have studied the integration of hybrid propulsion and sewage treatment systems powered by a Stirling engine in order to meet these new environmental regulations and provide comfort during the navigation of sailing boats. It is anticipated that experimental tests will be carried out after once the design stage of the system has been completed
On-line thermal emulation: How to speed-up your thermal controller design
No full textDynamic thermal management (DTM) is a key technology for future many-core systems. Indeed systems, as both server-class and embedded chip multiprocessors are thermally constrained. DTM design requires consideration for the chain of interactions between HW operating points, workload phases, power consumption, die temperature, HW monitor infrastructure, control policy. Hugely different time scales are involved, from microseconds to hours. Simulating performance of DTM solutions for a many-core system in a reasonable time is an open problem. In this paper we present an on-line thermal emulation framework based on the Intel Single-Chip-Cloud computer. In our framework a subset of the cores are used to on-line emulate the evolution of a generic thermal floorplan based on the real workload usage and operating point selected by the rest of the cores which emulate the target managed system. This enables design space exploration of dynamic thermal management solutions at the speed of real workload execution
Efficient parallel beamforming for 3D ultrasound imaging
Full text linkOne of the most demanding tasks in state-of-the-art medical ultrasound systems is the localization of possible scatterers in the body based on received echoes. Digital beamforming involves the summation of all received echoes in each image point according to their time of flight, i.e., their delay. This requires the knowledge of the delays for all combinations of ultrasound transmitters, image points and receivers. Recent three-dimensional (3D) systems comprise thousands of transducer elements and millions of image points. Compared to traditional 2D systems, the total number of delays is several orders of magnitude larger.
In this paper, we present a new beamforming algorithm that exploitsthe inherent locality in the image formation and efficiently approximates the delays. Compared to latest proposed architectures, this results in 20 percent less arithmetic operations, and a reduction of the input/output (I/O) bandwidth and the total memory size by factors of 30 and 50, respectively
Prediction horizon vs. efficiency of optimal dynamic thermal control policies in HPC nodes
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