AFORS - Autonomous Fiber Optic Rotational Seismograph as a System for Continuous Monitoring the Rotational Seismic Events

2014 ◽  
Vol 909 ◽  
pp. 444-449 ◽  
Author(s):  
Leszek R. Jaroszewicz ◽  
Zbigniew Krajewski ◽  
Jerzy K. Kowalski ◽  
Anna Kurzych ◽  
Zbigniew Raszewski
Keyword(s):  
Direct Measurement ◽  
Continuous Monitoring ◽  
Fiber Optic ◽  
The Internet ◽  
Seismic Events ◽  
Processing Unit ◽  
Rotational Components ◽  
Telemetric System ◽  
Seismological Observatory ◽  
Seismic Rotation

We outline the development and application of the Autonomous Fibre-Optic Rotational Seismograph (AFORS), which utilizes the Sagnac effect for a direct measurement of seismic rotation. The main advantage of AFORS is it complete insensitivity to linear motions as well as a direct measurement of rotational components emitted during seismic events. The presented system contains a special autonomous signal processing unit which optimizes its operation for the measurement of rotation motions, whereas applied telemetric system based on the Internet allows for a remote AFORS control. The laboratory investigation of the two such devices indicated they keep accuracy no less than 5.1·10-9to 5.5·10-8rad/s in the frequency bandpass from 0.83 Hz to 106.15 Hz with protect linear changes of sensitivity in above bandpass. The experimental results of AFORS-1 application for continuous monitoring the rotational events in the Książ (Poland) seismological observatory are also presented.

A method for assessing clearance rates in suspension-feeding organisms by means of a fiber-optic colorimeter

1991 ◽  
Vol 69 (10) ◽  
pp. 2703-2706 ◽  
Author(s):  
Daniel J. Hornbach ◽  
Thomas Wilcox ◽  
John Layne ◽  
Lindsay Powers ◽  
Timothy Davis
Keyword(s):  
Direct Measurement ◽  
Continuous Monitoring ◽  
Fiber Optic ◽  
Suspension Feeding ◽  
Light Path ◽  
Fiber Optic Probe ◽  
Clearance Rates ◽  
Path Lengths ◽  
Optic Probe

A method for determining the clearance rates of suspension-feeding organisms by means of a fiber-optic colorimeter is discussed. The fiber-optic probe facilitates direct measurement of the turbidity of solutions without the need for removing subsamples. This allows for continuous monitoring and overcomes problems associated with calculating clearance rates if subsamples are removed. Standard curves are provided for plastic microspheres of six sizes (0.497–45.8 μm diameter), at concentrations of 0.8–100 mg/L, for each of four light-path lengths (1, 2, 5, and 10 cm). An experiment using the freshwater unionid mussel Truncilla truncata is described as an example of the use of this method.

Multipoint Fiber-Optic Hot-Spot Sensing Network Integrated Into High Power Transformer for Continuous Monitoring

2008 ◽  
Vol 8 (7) ◽  
pp. 1264-1267 ◽  
Author(s):  
A. B. Lobo Ribeiro ◽  
N. F. Eira ◽  
J. M. Sousa ◽  
P. T. Guerreiro ◽  
J. R. Salcedo
Keyword(s):  
High Power ◽  
Continuous Monitoring ◽  
Fiber Optic ◽  
Power Transformer ◽  
Hot Spot

Design and Simulation of a PC to PC Communication Network via Fiber Optic Cable

2013 ◽  
Vol 824 ◽  
pp. 206-214
Author(s):  
Babatunde A. Adegboye ◽  
B.B. Bello ◽  
K.R. Ekundayo ◽  
Juliet N. Adegboye
Keyword(s):  
Communication Network ◽  
Fiber Optic ◽  
Data Transfer ◽  
The Internet ◽  
Serial Port ◽  
Fiber Optic Cable ◽  
Optical Transmitter ◽  
Wireless Medium ◽  
Fiber Optic Communication ◽  
Optic Communication

This paper deals with data transfer from one computer to another. The serial ports of the computer are used. MAX 232 is used to convert RS 232 logic to TTL logic and then an optical transmitter circuit is used to transmit data via fiber optic cable. The optical transmitter circuit has an LED which is matched with the cable. At the receiver an optical receiver circuit is used which receives data using a photo diode and a MAX 232 again to convert TTL logic to RS 232 for the serial port at the receiving end computer. The desired baud rate can be set. Although the internet can be used, but due to its time consuming nature, one can implement data transfer using wireless medium, though at a relatively high cost. The need, therefore, is felt for fiber optic communication which is cheaper and more suitable for the task. It is cheaper than wireless medium and is prone to lesser loss as compared to wireless medium.

scholarly journals Elastic Computing in the Fog on Internet of Things to Improve the Performance of Low Cost Nodes

Electronics ◽  
2019 ◽  
Vol 8 (12) ◽  
pp. 1489 ◽  
Author(s):  
Rafael Fayos-Jordan ◽  
Santiago Felici-Castell ◽  
Jaume Segura-Garcia ◽  
Adolfo Pastor-Aparicio ◽  
Jesus Lopez-Ballester
Keyword(s):  
Operating System ◽  
Internet Of Things ◽  
Low Cost ◽  
Fog Computing ◽  
Mesh Network ◽  
Raspberry Pi ◽  
The Internet ◽  
Processing Unit ◽  
Computing Paradigm ◽  
Elastic Computing

The Internet of Things (IoT) is a network widely used with the purpose of connecting almost everything, everywhere to the Internet. To cope with this goal, low cost nodes are being used; otherwise, it would be very expensive to expand so fast. These networks are set up with small distributed devices (nodes) that have a power supply, processing unit, memory, sensors, and wireless communications. In the market, we can find different alternatives for these devices, such as small board computers (SBCs), e.g., Raspberry Pi (RPi)), with different features. Usually these devices run a coarse version of a Linux operating system. Nevertheless, there are many scenarios that require enhanced computational power that these nodes alone are unable to provide. In this context, we need to introduce a kind of collaboration among the devices to overcome their constraints. We based our solution in a combination of clustering techniques (building a mesh network using their wireless capabilities); at the same time we try to orchestrate the resources in order to improve their processing capabilities in an elastic computing fashion. This paradigm is called fog computing on IoT. We propose in this paper the use of cloud computing technologies, such as Linux containers, based on Docker, and a container orchestration platform (COP) to run on the top of a cluster of these nodes, but adapted to the fog computing paradigm. Notice that these technologies are open source and developed for Linux operating system. As an example, in our results we show an IoT application for soundscape monitoring as a proof of concept that it will allow us to compare different alternatives in its design and implementation; in particular, with regard to the COP selection, between Docker Swarm and Kubernetes. We conclude that using and combining these techniques, we can improve the overall computation capabilities of these IoT nodes within a fog computing paradigm.

scholarly journals Review of Medical Thermometry: From the Advent to Modern Applications

Medicina ◽  
2021 ◽  
Vol 9 (3) ◽  
pp. 75-90
Author(s):  
I. V. Borisov ◽  
◽  
V. A. Bondar ◽  
D. A. Kudinov ◽  
M. M. Kanarskii ◽  
...  
Keyword(s):  
Big Data ◽  
Information Technologies ◽  
Continuous Monitoring ◽  
Wearable Devices ◽  
The Internet ◽  
The Novel ◽  
State Of Health ◽  
Therapy Control ◽  
Advantages And Disadvantages ◽  
Internet Of Medical Things

The article describes the first and modern devices for the study of temperature, their principles of operation and the prospects for the development of medical thermometry in clinical practice, along with the use of information technologies, their advantages and disadvantages. The prospects for the use of thermometry using remote methods of recording temperature, wearable devices, the Internet of medical things, telemedicine, big data for patients in rehabilitation at home as part of continuous monitoring of the state of health are considered. The article emphasizes the importance of measuring body temperature by remote thermometry as one of the main diagnostic markers of infection during the pandemic of the novel SARS-CoV-2 virus infection. Also, the importance of thermometry for the timely appointment of antipyretic therapy, control over the course of various diseases and the effectiveness of the prescribed treatment is considered.

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