scholarly journals Embedded software developments in KM3NeT phase I

2021 ◽  
Vol 16 (12) ◽  
pp. C12008
Author(s):  
V. van Beveren ◽  
D. Real ◽  
T. Chiarusi ◽  
D. Calvo ◽  
S. Mastroianni ◽  
...  
Keyword(s):  
Phase I ◽  
Mediterranean Sea ◽  
Deep Sea ◽  
Cherenkov Radiation ◽  
Embedded Software ◽  
Neutrino Detectors ◽  
Neutrino Interactions ◽  
Control Electronics ◽  
And Control ◽  
Xilinx Fpga

Abstract The KM3NeT collaboration has already produced more than one thousand acquisition boards, used for building two deep-sea neutrino detectors at the bottom of the Mediterranean Sea, with the aim of instrumenting a volume of several cubic kilometers with light sensors to detect the Cherenkov radiation produced in neutrino interactions. The so-called digital optical modules, house the PMTs and the acquisition and control electronics of the module, the central logic board, which includes a Xilinx FPGA and embedded soft processor. The present work presents the architecture and functionalities of the software embedded in the soft processor of the central logic board.

scholarly journals Simulation studies for large scale acoustic neutrino detectors

2019 ◽  
Vol 216 ◽  
pp. 04002
Author(s):  
Dominik Kieβling ◽  
Robert Lahmann
Keyword(s):  
Mediterranean Sea ◽  
Deep Sea ◽  
Large Scale ◽  
Neutrino Telescope ◽  
Simulation Studies ◽  
Neutrino Detector ◽  
Neutrino Detectors ◽  
Design Goal ◽  
Neutrino Detection ◽  
Acoustic Array

The AMADEUS system is a submarine acoustic array that was operated from 2008 until 2015 as a part of the ANTARES neutrino telescope in the Mediterranean Sea. Its design goal was to investigate the feasibility of acoustic neutrino detection in the deep sea. The data taken during its eight years of operation provide a wealth of information for setting up realistic simulations of future acoustic neutrino detectors. Using in addition simulations of neutrino interactions in water, various potential acoustic neutrino detector designs were investigated and methods for suppressing background and reconstructing energy and direction of incoming neutrinos were developed. In this article, some recent results will be presented.

The Mediterranean Action Plan: A Regional Approach to Pollution Control

1986 ◽  
Vol 18 (9) ◽  
pp. 197-205
Author(s):  
Lj Jeftié ◽  
L. J. Saliba
Keyword(s):  
Mediterranean Sea ◽  
Action Plan ◽  
Control Measures ◽  
Industrial Wastes ◽  
Pollution Monitoring ◽  
Environmental Preservation ◽  
Agricultural Pesticides ◽  
The Mediterranean ◽  
A Prospective Study ◽  
And Control

Increasing concern over the deterioration of the Mediterranean sea as a result of increasing pollution by untreated sewage and industrial wastes, agricultural pesticides and fertilizers and oil discharges, led to a series of meetings between 1970 and 1974, and finally to the UNEP-sponsored Mediterranean Action Plan, adopted by governments of the region in 1975 and ongoing since that time. The legal component of the Plan includes a framework Convention and four protocols; the environmental assessment component (the MED POL programme) consists of national pollution monitoring programmes, and research projects conducted by Mediterranean institutions; the environmental management component consists of the Blue Plan (a prospective study combining socio-economic development with environmental preservation) and the Priority Actions Programme (a series of sub-region sectoral projects in defined areas). The Plan has been financed by Mediterranean States since 1979, and is managed by UNEP with the cooperation of other competent UN Agencies. During the last ten years, activities undertaken have improved knowledge of the state of pollution of the Mediterranean sea, and facilitated joint regional action in the form of preventive and control measures.

scholarly journals Benthic deep-sea fungi in submarine canyons of the Mediterranean Sea

2018 ◽  
Vol 168 ◽  
pp. 57-64 ◽  
Author(s):  
Giulio Barone ◽  
Eugenio Rastelli ◽  
Cinzia Corinaldesi ◽  
Michael Tangherlini ◽  
Roberto Danovaro ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Deep Sea ◽  
Submarine Canyons ◽  
The Mediterranean

Speciation of mercury in surface and deep-sea waters in the Mediterranean Sea

2003 ◽  
Vol 37 ◽  
pp. 93-108 ◽  
Author(s):  
Milena Horvat ◽  
Jože Kotnik ◽  
Martina Logar ◽  
Vesna Fajon ◽  
Tomislav Zvonarić ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Deep Sea ◽  
The Mediterranean

scholarly journals Numerical and Experimental Research on the Effect of Platform Heave Motion on Vortex-Induced Vibration of Deep Sea Top-Tensioned Riser

2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
Jie Zhang ◽  
Ying Zeng ◽  
Yougang Tang ◽  
Wenyun Guo ◽  
Zhenkui Wang
Keyword(s):  
Parametric Excitation ◽  
Deep Sea ◽  
Frequency Component ◽  
Vortex Induced Vibration ◽  
Wake Oscillator ◽  
Validation Experiment ◽  
Simulation And Experiment ◽  
Prediction And Control ◽  
Heave Motion ◽  
And Control

The prediction and control of vortex-induced vibration (VIV) is one of the key problems for riser design. The effect of platform heave motion on VIV of deep sea top-tensioned riser (TTR) is presented by means of numerical simulation and experiment in this research. First, the heave motion was modeled as a parametric excitation, and the governing equation of VIV of riser considering the parametric excitation was established. Then, the dynamic response of TTR was calculated numerically by the finite difference method based on the Van der Pol wake-oscillator model. Finally, a validation experiment was carried out at the towing tank of Tianjin university. The results show that the VIV response at the bottom of riser is significantly increased due to the platform heave motion, especially in the situation of low current velocity. The larger amplitude and the higher frequency of the platform heave motion with the greater influence are generated on VIV of TTR. In particular, the value of 0.5 times, 1 time, or other multiples of the platform heave frequency will be included in the vibration frequency component of TTR when the platform heave amplitude is large and the frequency is high.

scholarly journals Deep-sea distribution, biological and ecological aspects of Aristeus antennatus ( Risso, 1816) in the western and central Mediterranean Sea

2004 ◽  
Vol 68 (S3) ◽  
pp. 117-127 ◽  
Author(s):  
Francisco Sardà ◽  
Gianfranco D'Onghia ◽  
Chrissi Yianna Politou ◽  
Joan Baptista Company ◽  
Porzia Maiorano ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Deep Sea ◽  
Central Mediterranean ◽  
Ecological Aspects ◽  
Central Mediterranean Sea ◽  
Aristeus Antennatus

scholarly journals A Flywheel Energy Storage and Conversion System for Solar Photovoltaic Applications

1979 ◽  
Author(s):  
A. R. Millner
Keyword(s):  
Energy Storage ◽  
Magnetic Bearing ◽  
Design Parameters ◽  
Energy Storage And Conversion ◽  
Solar Photovoltaic ◽  
Structural Topology ◽  
Flywheel Energy Storage ◽  
Conversion System ◽  
Control Electronics ◽  
And Control

A low-drag, low-power magnetic bearing and a permanent magnet brushless d-c motor-generator have been developed for a satellite flywheel. These will be combined with a terrestrial flywheel and control electronics to make up a flywheel energy storage and conversion system for use in a stand-alone solar photovoltaic residence. Technical and economic performance analyses indicate that, contrary to general thought, a flywheel system will be competitive if not superior to more conventional systems utilizing either present-day or advanced batteries. This derives from the ability of the flywheel to perform the functions of d-c to a-c inversion and optimal impedance matching between the PV arrays and the load in addition to providing energy storage. The motor-generator design will also be discussed. This paper describes the structural topology, performance data, design parameters, and test measurements of the magnetic bearing and motor-generator as well as a description of the flywheel and control electronics to be used. A preliminary discussion of the economic aspects is also included.

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