Dealing with incomplete and variable detectability in multi-year, multi-site monitoring of ecological populations

Bearing damage is one of the common failure modes in composite bolted joints. This paper describes the development of an on-site monitoring method based on eddy current (EC) sensing film to monitor the bearing damage in carbon fiber reinforced plastic (CFRP) single-lap bolted joints under tensile testing. Configuration design and operating principles of EC array sensing film are demonstrated. A series of numerical simulations are conducted to analyze the variation of EC when the bearing failure occurs around the bolt hole. The results of damage detection in the horizontal direction and through the thickness direction in the bolt hole with different exciting current directions are presented by the finite element method (FEM). Experiments are performed to prove the feasibility of the proposed EC array sensing film when the bearing failure occurs in CFRP single-lap bolted joints. The results of numerical simulations and experiments indicate that bearing failure can be detected according to the variation of EC in the test specimen.

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Monitoring advances including consent: learning from COVID-19 trials and other trials running in UKCRC registered clinical trials units during the pandemic

Trials ◽

10.1186/s13063-021-05225-5 ◽

2021 ◽

Vol 22 (1) ◽

Author(s):

Sharon B. Love ◽

Emma Armstrong ◽

Carrie Bayliss ◽

Melanie Boulter ◽

Lisa Fox ◽

...

Keyword(s):

Clinical Trials ◽

Remote Monitoring ◽

Research Collaboration ◽

Monitoring Task ◽

Critical Data ◽

Site Monitoring ◽

Clinical Trials Unit ◽

Third Person ◽

Trial Monitoring ◽

The Uk

AbstractThe COVID-19 pandemic has affected how clinical trials are managed, both within existing portfolios and for the rapidly developed COVID-19 trials. Sponsors or delegated organisations responsible for monitoring trials have needed to consider and implement alternative ways of working due to the national infection risk necessitating restricted movement of staff and public, reduced clinical staff resource as research staff moved to clinical areas, and amended working arrangements for sponsor and sponsor delegates as staff moved to working from home.Organisations have often worked in isolation to fast track mitigations required for the conduct of clinical trials during the pandemic; this paper describes many of the learnings from a group of monitoring leads based in United Kingdom Clinical Research Collaboration (UKCRC) Clinical Trials Unit (CTUs) within the UK.The UKCRC Monitoring Task and Finish Group, comprising monitoring leads from 9 CTUs, met repeatedly to identify how COVID-19 had affected clinical trial monitoring. Informed consent is included as a specific issue within this paper, as review of completed consent documentation is often required within trial monitoring plans (TMPs). Monitoring is defined as involving on-site monitoring, central monitoring or/and remote monitoring.Monitoring, required to protect the safety of the patients and the integrity of the trial and ensure the protocol is followed, is often best done by a combination of central, remote and on-site monitoring. However, if on-site monitoring is not possible, workable solutions can be found using only central or central and remote monitoring. eConsent, consent by a third person, or via remote means is plausible. Minimising datasets to the critical data reduces workload for sites and CTU staff. Home working caused by COVID-19 has made electronic trial master files (TMFs) more inviting. Allowing sites to book and attend protocol training at a time convenient to them has been successful and worth pursuing for trials with many sites in the future.The arrival of COVID-19 in the UK has forced consideration of and changes to how clinical trials are conducted in relation to monitoring. Some developed practices will be useful in other pandemics and others should be incorporated into regular use.

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Fixed site monitoring of potential gradient fluctuations near to AC high voltage power lines

Journal of Physics Conference Series ◽

10.1088/1742-6596/301/1/012005 ◽

2011 ◽

Vol 301 ◽

pp. 012005 ◽

Cited By ~ 3

Author(s):

J C Matthews

Keyword(s):

High Voltage ◽

Potential Gradient ◽

Power Lines ◽

Site Monitoring ◽

High Voltage Power Lines

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On-site monitoring and subjective comfort assessment of a sun shadings and electric lighting controller based on novel High Dynamic Range vision sensors

Energy and Buildings ◽

10.1016/j.enbuild.2017.05.017 ◽

2017 ◽

Vol 149 ◽

pp. 58-72 ◽

Cited By ~ 25

Author(s):

Ali Motamed ◽

Laurent Deschamps ◽

Jean-Louis Scartezzini

Keyword(s):

Dynamic Range ◽

High Dynamic Range ◽

Vision Sensors ◽

Site Monitoring ◽

High Dynamic

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Microfluidic Airborne Metal Particle Sensor Using Oil Microcirculation for Real-Time and Continuous Monitoring of Metal Particle Emission

Micromachines ◽

10.3390/mi12070825 ◽

2021 ◽

Vol 12 (7) ◽

pp. 825

Author(s):

Jong-Seo Yoon ◽

Jiwon Park ◽

Hye-Rin Ahn ◽

Seong-Jae Yoo ◽

Yong-Jun Kim

Keyword(s):

Real Time ◽

Metal Particle ◽

Continuous Monitoring ◽

Metal Particles ◽

Minimum Size ◽

Capacitive Sensing ◽

Test Bed ◽

Optimal Frequency ◽

Site Monitoring ◽

Cost Efficient

Airborne metal particles (MPs; particle size > 10 μm) in workplaces result in a loss in production yield if not detected in time. The demand for compact and cost-efficient MP sensors to monitor airborne MP generation is increasing. However, contemporary instruments and laboratory-grade sensors exhibit certain limitations in real-time and on-site monitoring of airborne MPs. This paper presents a microfluidic MP detection chip to address these limitations. By combining the proposed system with microcirculation-based particle-to-liquid collection and a capacitive sensing method, the continuous detection of airborne MPs can be achieved. A few microfabrication processes were realized, resulting in a compact system, which can be easily replaced after contamination with a low-priced microfluidic chip. In our experiments, the frequency-dependent capacitive changes were characterized using MP (aluminum) samples (sizes ranging from 10 μm to 40 μm). Performance evaluation of the proposed system under test-bed conditions indicated that it is capable of real-time and continuous monitoring of airborne MPs (minimum size 10 μm) under an optimal frequency, with superior sensitivity and responsivity. Therefore, the proposed system can be used as an on-site MP sensor for unexpected airborne MP generation in precise manufacturing facilities where metal sources are used.

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Mercury Toxicity and Detection Using Chromo-Fluorogenic Chemosensors

Pharmaceuticals ◽

10.3390/ph14020123 ◽

2021 ◽

Vol 14 (2) ◽

pp. 123 ◽

Cited By ~ 1

Author(s):

Vinita Bhardwaj ◽

Valeria M. Nurchi ◽

Suban K. Sahoo

Keyword(s):

Low Cost ◽

High Sensitivity ◽

Mercury Toxicity ◽

Natural Sources ◽

Detection Ability ◽

Mercuric Ion ◽

Site Monitoring ◽

Essential Heavy Metal ◽

Analytical Approaches ◽

Excessive Accumulation

Mercury (Hg), this non-essential heavy metal released from both industrial and natural sources entered into living bodies, and cause grievous detrimental effects to the human health and ecosystem. The monitoring of Hg2+ excessive accumulation can be beneficial to fight against the risk associated with mercury toxicity to living systems. Therefore, there is an emergent need of novel and facile analytical approaches for the monitoring of mercury levels in various environmental, industrial, and biological samples. The chromo-fluorogenic chemosensors possess the attractive analytical parameters of low-cost, enhanced detection ability with high sensitivity, simplicity, rapid on-site monitoring ability, etc. This review was narrated to summarize the mercuric ion selective chromo-fluorogenic chemosensors reported in the year 2020. The design of sensors, mechanisms, fluorophores used, analytical performance, etc. are summarized and discussed.

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Distribution and behavior of fission product 95Nb in FLiBe salt

Radiochimica Acta ◽

10.1515/ract-2020-0057 ◽

2021 ◽

Vol 0 (0) ◽

Author(s):

Zhiqiang Cheng ◽

Xiaohe Wang ◽

Zhongqi Zhao ◽

Junxia Geng ◽

Jifeng Hu ◽

...

Keyword(s):

Fission Product ◽

Redox Potential ◽

Molten Salt ◽

Molten Salt Reactor ◽

Lithium Metal ◽

Site Monitoring ◽

Salt Addition ◽

Redox Indicator ◽

Γ Ray ◽

And Behavior

Abstract The 235,238UF4 was irradiated by photo-neutrons, distribution and behavior of the fission product 95Nb from irradiated 235,238UF4 in FLiBe salt were investigated by the measurement of its activity in the salt with the γ-ray spectroscopy. The experiments indicated that a part of 95Nb deposited on the surfaces of graphite and Hastelloy, as the moderator and the structural materials of molten salt reactor (MSR), respectively, and the majority of 95Nb maintained in molten salt. Addition of lithium metal made 95Nb in salt to be reduced and settled, leading to the decrease in its activity. Degree of the decrease was found to be correlated with niobium concentration. The experimental results supported the statement proposed early by ORNL, that 95Nb might be used as a redox indicator for MSR. Finally, the problem met with on-site monitoring for redox potential in MSR was pointed, and a possible protocol to resolve the problem was proposed.

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Image stabilization technology for active bridge-vessel anti-collision monitoring system

10.2749/ghent.2021.0549 ◽

2021 ◽

Author(s):

Zhufeng Shao ◽

Haiying Ma ◽

Ye Xia ◽

Junjie Wang

Keyword(s):

New Technologies ◽

Target Recognition ◽

Image Data ◽

Tracking Data ◽

Collision System ◽

High Quality ◽

Image Stabilization ◽

Site Monitoring ◽

New Research ◽

Sea Area

<p>In recent years, the active anti-collision system using new technologies such as image target recognition between ship and bridge becomes a new research hotspot. Due to camera jitter, it is not easy to deeply mine the monitoring image data. This paper puts forward an anti-jitter algorithm to obtain the ship monitoring track in the sea area removing the camera jitter. It uses electronic image stabilization, sea-sky line anti jitter filtering, and other methods to process the on-site monitoring video, then compares the effect of each technique, and finally obtains high-quality ship tracking data. Through this method, a high-quality ship monitoring track in the bridge area can be obtained.</p>

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Application of Gold-Nanoparticle Colorimetric Sensing to Rapid Food Safety Screening

Sensors ◽

10.3390/s18124166 ◽

2018 ◽

Vol 18 (12) ◽

pp. 4166 ◽

Cited By ~ 20

Author(s):

Guangyang Liu ◽

Meng Lu ◽

Xiaodong Huang ◽

Tengfei Li ◽

Donghui Xu

Keyword(s):

Gold Nanoparticles ◽

Gold Nanoparticle ◽

Rapid Testing ◽

Colorimetric Sensing ◽

Preparation Methods ◽

Particle Spacing ◽

Advantages And Disadvantages ◽

Site Monitoring ◽

Biological Affinity ◽

Food Quality And Safety

Due to their unique optical properties, narrow size distributions, and good biological affinity, gold nanoparticles have been widely applied in sensing analysis, catalytic, environmental monitoring, and disease therapy. The color of a gold nanoparticle solution and its maximum characteristic absorption wavelength will change with the particle size and inter-particle spacing. These properties are often used in the detection of hazardous chemicals, such as pesticide residues, heavy metals, banned additives, and biotoxins, in food. Because the gold nanoparticles-colorimetric sensing strategy is simple, quick, and sensitive, this method has extensive applications in real-time on-site monitoring and rapid testing of food quality and safety. Herein, we review the preparation methods, functional modification, photochemical properties, and applications of gold nanoparticle sensors in rapid testing. In addition, we elaborate on the colorimetric sensing mechanisms. Finally, we discuss the advantages and disadvantages of colorimetric sensors based on gold nanoparticles, and directions for future development.

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