In-service monitoring with Centralized Failure Detection System (CFDS) in FTTH access network

2008 ◽  
Author(s):  
Mohammad Syuhaimi Ab-Rahman ◽  
Ng Boon Chuan ◽  
Kasmiran Jumari
Keyword(s):  
Detection System ◽  
Access Network ◽  
Failure Detection ◽  
Service Monitoring

scholarly journals A Study on the Improvement of Efficiency by Detection Solar Module Faults in Deteriorated Photovoltaic Power Plants

2021 ◽  
Vol 11 (2) ◽  
pp. 727 ◽  
Author(s):  
Myeong-Hwan Hwang ◽  
Young-Gon Kim ◽  
Hae-Sol Lee ◽  
Young-Dae Kim ◽  
Hyun-Rok Cha
Keyword(s):  
Power Generation ◽  
Power Plants ◽  
Detection System ◽  
Failure Detection ◽  
Solar Module ◽  
Thermal Images ◽  
Power Stations ◽  
Photovoltaic Power ◽  
Manufacturing Technologies ◽  
Pv Power Generation

In recent years, photovoltaic (PV) power generation has attracted considerable attention as a new eco-friendly and renewable energy generation technology. With the recent development of semiconductor manufacturing technologies, PV power generation is gradually increasing. In this paper, we analyze the types of defects that form in PV power generation panels and propose a method for enhancing the productivity and efficiency of PV power stations by determining the defects of aging PV modules based on their temperature, power output, and panel images. The method proposed in the paper allows the replacement of individual panels that are experiencing a malfunction, thereby reducing the output loss of solar power generation plants. The aim is to develop a method that enables users to immediately check the type of failures among the six failure types that frequently occur in aging PV panels—namely, hotspot, panel breakage, connector breakage, busbar breakage, panel cell overheating, and diode failure—based on thermal images by using the failure detection system. By comparing the data acquired in the study with the thermal images of a PV power station, efficiency is increased by detecting solar module faults in deteriorated photovoltaic power plants.

An integrated fault-tolerant control strategy for control surface failure in a fighter aircraft

2021 ◽  
pp. 1-30
Author(s):  
İ. Gümüşboğa ◽  
A. İftar
Keyword(s):  
Control Strategy ◽  
Fault Tolerant ◽  
Detection System ◽  
Fault Tolerant Control ◽  
Failure Detection ◽  
Computational Effort ◽  
Control Surface ◽  
Fighter Aircraft ◽  
Control Structures ◽  
Computational Load

Abstract Elevator failure may have fatal consequences for fighter aircraft that are unstable due to their high manoeuvrability requirements. Many studies have been conducted in the literature using active and passive fault-tolerant control structures. However, these studies mostly include sophisticated controllers with high computational load that cannot work in real systems. Considering the multi-functionality and broad operational prospects of fighter aircraft, computational load is very important in terms of applicability. In this study, an integrated fault-tolerant control strategy with low computational load is proposed without sacrificing the ability to cope with failures. This control strategy switches between predetermined controllers in the case of failure. One of these controllers is designed to operate in a non-failure condition. This controller is a basic controller that requires very little computational effort. The other controller operates when an asymmetric elevator failure occurs. This controller is a robust fault-tolerant controller that can fly the aircraft safely in case of elevator failure. The switching is decided by a failure detection system. The proposed integrated fault-tolerant control system is verified by non-linear F-16 flight simulations. These simulations show that the proposed method can cope with failures but requires less computational load because it uses a conventional controller in the case of no failure.

Development of a PSA tracking system for patients wtih prostate cancer following definitive radiotherapy to enhance rural health.

2016 ◽  
Vol 34 (2_suppl) ◽  
pp. 39-39 ◽  
Author(s):  
Michael G. Chang ◽  
Kristine DeSotto ◽  
Paul Taibi ◽  
Sandra Troeschel
Keyword(s):  
Prostate Cancer ◽  
Detection System ◽  
Tracking System ◽  
Failure Detection ◽  
Phone Call ◽  
Therapeutic Window ◽  
Definitive Radiotherapy ◽  
Psa Testing ◽  
Query Tool

39 Background: Patients with prostate cancer (PC) may benefit from early intervention when they experience relapse/recur. About 50% of our PC patients are rural and experience barriers to care due to distance, cost, and convenience. We sought to create a PSA tracking system with the Veterans Administration’s (VA) Electronic Medical Record (EMR) that would provide a remote way to monitor disease progression after definitive radiotherapy (XRT) by annual PSA testing alone. Methods: Using VA’s EMR, we developed a query tool to identify all patients ever treated at our center with XRT for prostate cancer who were alive, had not been seen in our clinic in more than a year, did not have metastatic disease, and had a rising PSA of at least 0.5 ng/ml above nadir, or who had no PSA drawn within 15 months. Results: Among roughly 50,000 unique patients in the McGuire VAMC EMR, we found 1,858 patients treated with XRT for PC more than 5 years ago between 1997 and 2015. Of these 1,190 were still alive and 455 had not been seen by our clinic in 400 days or more. Of these 455 patients, 159 patients had not had a PSA drawn within 15 months and/or their most recent PSA was more than 0.5 ng/ml above nadir, triggering a chart review followed by either a phone call, repeat testing, in person follow up visit, or removal from follow up monitoring if clinically indicated. 296 patients were receiving appropriate care outside of our clinic and had no sign of significant rise in PSA. An analysis by the VA showed annual savings of $60,360 per year in fuel costs by avoiding unnecessary visits. Conclusions: The VA’s robust EMR and a new query tool can identify patients with prostate cancer who are lost to follow up or who needed intervention from among thousands of patients in the EMR, improving quality while reducing cost and unnecessary time and travel for rural and all patients. More importantly, our tool could be modified to improve survival for all VA patients with prostate cancer by creating a VA-wide PSA failure detection system. The system would alert providers to any patient who may benefit from early salvage radiotherapy or hormonal therapy before their disease progresses beyond the therapeutic window of benefit.

Development of Fuel Failure Detection System for a High Temperature Gas Cooled Reactor

1987 ◽  
Vol 34 (1) ◽  
pp. 567-570 ◽  
Author(s):  
H. Terada ◽  
N. Wakayama ◽  
M. Obata ◽  
T. Tobita ◽  
N. Tsuyuzaki ◽  
...  
Keyword(s):  
High Temperature ◽  
Detection System ◽  
Failure Detection ◽  
Fuel Failure ◽  
High Temperature Gas

CONTAINER FAILURE DETECTION SYSTEM

1963 ◽  
Author(s):  
A. B. Wieczorek ◽  
M. B. Levine
Keyword(s):  
Detection System ◽  
Failure Detection

A QoS Control Scheme based on Software Defined Fiber-Wireless Access Network for Survivability

2018 ◽  
Vol 39 (3) ◽  
pp. 325-334
Author(s):  
Danping Ren ◽  
Lijing Zhang ◽  
Jijun Zhao ◽  
Tianwei Zhao ◽  
Shanshan Wu
Keyword(s):  
Bandwidth Allocation ◽  
Access Network ◽  
Failure Detection ◽  
High Rate ◽  
Heterogeneous Structure ◽  
Detection Scheme ◽  
Control Scheme ◽  
Data Flows ◽  
Wireless Access Network ◽  
Qos Performance

Abstract Fiber-Wireless (FiWi) access network is a promising broadband access network. Taking its heterogeneous structure into consideration, the paper introduces the Software Defined Networks (SDN) into FiWi access network. Survivability is an important issue in FiWi access network. Once there is a single fiber fails, many high-rate traffic flows may loss. A failure detection scheme is proposed for one distribution fiber fault in the new architecture. For the affected data flows recovery, we focus on the bandwidth allocation scheme for different priorities queues to meet the QoS. The simulation results show that the proposed scheme can maintain the QoS performance in terms of delay, loss rate and network throughput. The survivability is improved efficiently.

Sign in / Sign up

Export Citation Format

Share Document