Initial radiation measurement results from Europe's Galileo test-bed satellite, Giove-A

2006 ◽  
Author(s):  
K. A. Ryden ◽  
P. A. Morris ◽  
D. J Rodgers ◽  
C. S. Dyer ◽  
C. I. Underwood ◽  
...  
Keyword(s):  
Radiation Measurement ◽  
Test Bed ◽  
Measurement Results ◽  
Initial Radiation

scholarly journals Performance Analysis of DTN Using Level Signal Priority Epidemic Routing Protocol

2016 ◽  
Vol 3 (2) ◽  
Author(s):  
Ahmad Zainudin ◽  
Amang Sudarsono ◽  
Kevin Prima Pambudi
Keyword(s):  
Routing Protocol ◽  
Network Architecture ◽  
Dynamic Routing ◽  
Delay Tolerant Network ◽  
Test Bed ◽  
Measurement Results ◽  
Epidemic Routing ◽  
Epidemic Dynamic ◽  
Performance System ◽  
Delay Tolerant

A DTN architecture consists of several nodes that are connected with high dynamic topology. The routing protocol is an important part which determine the DTN performance system. Although DTN is addressed to be tolerant of delay, a routing protocol with better performance will maximizing packet delivery rate and minimizing the delivery latency. This paper evaluate a level signal priority epidemic routing protocol for delay tolerant network architecture. Our system adopts DTN2 framework using classic epidemic and priority epidemic dynamic routing protocols. The performance of both dynamic routing is observed and compared based on throughput and delay of transmitted data. The measurement results show that the classic epidemic use more bandwith due to sending the same messages many times. The delay transmission using a level signal priority epidemic routing is smaller than classic epidemic routing protocol in all hops of the test-bed. Epidemic based on signal level routing could make traffic of network more efficient than classic Epidemic routing because of filtering system in node before sending bundle to neighbor node.Keywords: DTN, dynamic routing, level signal priority

scholarly journals Heterogeneous (ITS-G5 and 5G) Vehicular Pilot Road Weather Service Platform in a Realistic Operational Environment

Sensors ◽  
2021 ◽  
Vol 21 (5) ◽  
pp. 1676
Author(s):  
Muhammad Naeem Tahir ◽  
Marcos Katz
Keyword(s):  
Real Time ◽  
Traffic Safety ◽  
Field Measurement ◽  
Road Traffic ◽  
Research Work ◽  
Ieee 802.11P ◽  
Weather Data ◽  
Test Bed ◽  
Operational Environment ◽  
Measurement Results

VANETs (Vehicular Ad hoc Networks) operating in conjunction with road-side infrastructure connecting road-side infrastructure are an emerging field of wireless communication technology in the vehicular communication’s domain. For VANETs, the IEEE 802.11p-based ITS-G5 is one of the key standards for communication globally. This research work integrates the ITS-G5 with a cellular-based 5G Test Network (5GTN). The resulting advanced heterogeneous Vehicular Network (VN) test-bed works as an effective platform for traffic safety between vehicles and road-side-infrastructure. This test-bed network provides a flexible framework to exploit vehicle-based weather data and road observation information, creating a service architecture for VANETs that supports real-time intelligent traffic services. The network studied in this paper aims to deliver improved road safety by providing real-time weather forecast, road friction information and road traffic related services. This article presents the implementation of a realistic test-bed in Northern Finland and the field measurement results of the heterogeneous VANETs considering the speed of vehicle, latency, good-put time and throughput. The field measurement results have been obtained in a state-of-the-art hybrid VANET system supporting special road weather services. Based on field measurement results, we suggest an efficient solution for a comprehensive hybrid vehicular networking infrastructure exploiting road weather information.

scholarly journals The combined method for uncertainty evaluation in electromagnetic radiation measurement

2014 ◽  
Vol 29 (4) ◽  
pp. 279-284 ◽  
Author(s):  
Aleksandar Kovacevic ◽  
Ana Kovacevic ◽  
Koviljka Stankovic ◽  
Uros Kovacevic
Keyword(s):  
Electromagnetic Radiation ◽  
Least Squares Method ◽  
Environmental Influence ◽  
Uncertainty Budget ◽  
Uncertainty Evaluation ◽  
Radiation Measurement ◽  
Combined Method ◽  
The Monte Carlo Method ◽  
Measurement Results ◽  
Power Measurements

Electromagnetic radiation of all frequencies represents one of the most common and fastest growing environmental influence. All populations are now exposed to varying degrees of electromagnetic radiation and the levels will continue to increase as technology advances. An electronic or electrical product should not generate electromagnetic radiation which may impact the environment. In addition, electromagnetic radiation measurement results need to be accompanied by quantitative statements about their accuracy. This is particularly important when decisions about product specifications are taken. This paper presents an uncertainty budget for disturbance power measurements of the equipment as part of electromagnetic radiation. We propose a model which uses a mixed distribution for uncertainty evaluation. The evaluation of the probability density function for the measurand has been done using the Monte Carlo method and a modified least-squares method (combined method). For illustration, this paper presents mixed distributions of two normal distributions, normal and rectangular, respectively.

A Study on Community-Based Reconstruction from Nuclear Power Plant Disaster - A Case Study of Minamisoma Ota Area in Fukushima -

2012 ◽  
Vol 7 (sp) ◽  
pp. 432-438 ◽  
Author(s):  
Tomoyuki Furutani ◽  
◽  
Keisuke Uehara ◽  
Jun Murai ◽  
Keyword(s):  
Power Plant ◽  
Nuclear Power ◽  
Measurement Method ◽  
Radiation Measurement ◽  
Community Based ◽  
Measurement Framework ◽  
Measurement Results ◽  
Before And After ◽  
Radiation Measurements

In this research, the authors developed a car-borne radiation measurement method for the farmland and roads in the Minamisoma Ota area of Fukushima that was devasteted by the Great East Japan Earthquake that occurred in northeast Japan on March 11, 2011, and a community-led radiation measurement framework was established and implemented. As a result, radiation measurements and visualization for farmlands, paddies, and forests, which had been conventionally unachievable, was made possible. Furthermore, effective verification of the effect of decontamination also became possible by feeding back radiation measurement results before and after decontamination to residents.

Experimental Evaluation of Small GTE Test Bed

2014 ◽  
Author(s):  
Jiří Pečinka ◽  
Adolf Jílek ◽  
Gabriel T. Bugajski
Keyword(s):  
Czech Republic ◽  
Gas Flow ◽  
Operating Conditions ◽  
Test Cell ◽  
Turbine Engines ◽  
Gas Turbine Engines ◽  
Test Bed ◽  
Engine Thrust ◽  
Measurement Results ◽  
The University

Staff at the University of Defence in Brno, Czech Republic, designed and constructed a test cell for small gas turbine engines as detailed in GT2012-69419. Once construction was completed, the test cell was instrumented and put through a series of tests to confirm the design suitability, calibrate data acquisition channels, establish correction parameters for measurement values, and examine real operating conditions. This paper details the methodology of those tests with a focus on used equipment, noise emissions, air and gas flow and the associated impact on engine thrust. Lastly, measurement results are presented and compared with the design predictions.

scholarly journals Effectiveness of BPSK Modulation With Peak Noise Avoidance Algorithm in Smart Street Lighting Communications Based on PLC

2018 ◽  
Vol 23 (1) ◽  
pp. 5-10
Author(s):  
Piotr Kiedrowski ◽  
Tomasz Marciniak ◽  
Zbigniew Lutowski ◽  
Łukasz Zabłudowski
Keyword(s):  
Test Bed ◽  
Street Lighting ◽  
Measurement Results ◽  
Lab Test ◽  
Bpsk Modulation

Abstract This work reports the measurement results of long-terms tests obtained in real smart street lighting LV networks and in lab test bed. The measurements results are presented in the form of PER vs. SNR characteristics for BPSK coded and BPSK coded with peak noise avoidance algorithm. The surprising results obtained from real LV networks prompted the Authors to carry out detailed lab tests. The setup for lab tests is also presented in this work. To carry out lab tests a suitable software was prepared, it allowed to obtain results in 72 times shorter time comparing to real conditions; it is why this work can present characteristics of PER vs. SNR even for the values of PER at the level of 10−9. The work concludes with disadvantages of using the peak noise avoidance algorithm in PLC communication for smart street lighting.

How do we sedate children undergoing CSF opening pressure measurement? Results of a Germany-wide survey

2011 ◽  
Vol 42 (S 01) ◽  
Author(s):  
D Tibussek ◽  
F Distelmaier ◽  
S Kummer ◽  
E Mayatepek
Keyword(s):  
Pressure Measurement ◽  
Opening Pressure ◽  
Measurement Results

State special primary acceleration measurement standard for gravimetry GET 190-2019

2020 ◽  
pp. 3-8
Author(s):  
L.F. Vitushkin ◽  
F.F. Karpeshin ◽  
E.P. Krivtsov ◽  
P.P. Krolitsky ◽  
V.V. Nalivaev ◽  
...  
Keyword(s):  
High Precision ◽  
Free Fall ◽  
Measurement Range ◽  
Measurement Standard ◽  
Acceleration Measurement ◽  
Measurement Systems ◽  
Free Fall Acceleration ◽  
Investigation Methods ◽  
Measurement Results ◽  
Upper Level

The State special primary acceleration measurement standard for gravimetry (GET 190-2019), its composition, principle of operation and basic metrological characteristics are presented. This standard is on the upper level of reference for free-fall acceleration measurements. Its accuracy and reliability were improved as a result of optimisation of the adjustment procedures for measurement systems and its integration within the upgraded systems, units and modern hardware components. A special attention was given to adjusting the corrections applied to measurement results with respect to procedural, physical and technical limitations. The used investigation methods made it possibled to confirm the measurement range of GET 190-2019 and to determine the contributions of main sources of errors and the total value of these errors. The measurement characteristics and GET 90-2019 were confirmed by the results obtained from measurements of the absolute value of the free fall acceleration at the gravimetrical site “Lomonosov-1” and by their collation with the data of different dates obtained from measurements by high-precision foreign and domestic gravimeters. Topicality of such measurements ensues from the requirements to handle the applied problems that need data on parameters of the Earth gravitational field, to be adequately faced. Geophysics and navigation are the main fields of application for high-precision measurements in this field.

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