JWST’s near infrared spectrograph status and first OTIS test results

2018 ◽  
Author(s):  
Ralf Ehrenwinkler ◽  
Peter Mosner ◽  
Hermann Karl ◽  
Martin Altenburg ◽  
Marc Maschmann ◽  
...  
Keyword(s):  
Near Infrared ◽  
Test Results

scholarly journals Cavity Ring-Down Methane Sensor for Small Unmanned Aerial Systems

Sensors ◽  
2020 ◽  
Vol 20 (2) ◽  
pp. 454 ◽  
Author(s):  
Benjamin Martinez ◽  
Thomas W. Miller ◽  
Azer P. Yalin
Keyword(s):  
Near Infrared ◽  
High Sensitivity ◽  
Unmanned Aerial Systems ◽  
Test Results ◽  
Methane Sensor ◽  
Open Path ◽  
Low Mass ◽  
Aerial Systems ◽  
High Finesse ◽  
Cavity Ring Down

We present the development, integration, and testing of an open-path cavity ring-down spectroscopy (CRDS) methane sensor for deployment on small unmanned aerial systems (sUAS). The open-path configuration used here (without pump or flow-cell) enables a low mass (4 kg) and low power (12 W) instrument that can be readily integrated to sUAS, defined here as having all-up mass of <25 kg. The instrument uses a compact telecom style laser at 1651 nm (near-infrared) and a linear 2-mirror high-finesse cavity. We show test results of flying the sensor on a DJI Matrice 600 hexacopter sUAS. The high sensitivity of the CRDS method allows sensitive methane detection with a precision of ~10–30 ppb demonstrated for actual flight conditions. A controlled release setup, where known mass flows are delivered, was used to simulate point-source methane emissions. Examples of methane plume detection from flight tests suggest that isolated plumes from sources with a mass flow as low as ~0.005 g/s can be detected. The sUAS sensor should have utility for emissions monitoring and quantification from natural gas infrastructure. To the best of our knowledge, it is also the first CRDS sensor directly deployed onboard an sUAS.

Surface Defects Detection of Red Jujube Based on Near-Infrared Vision System

2013 ◽  
Vol 303-306 ◽  
pp. 573-577
Author(s):  
Min Xu ◽  
Yue Ma ◽  
Shuai Chen
Keyword(s):  
Machine Vision ◽  
Near Infrared ◽  
Surface Defects ◽  
Vision System ◽  
Infrared Image ◽  
Machine Vision System ◽  
Test Results ◽  
Quality Factors ◽  
Important Quality ◽  
Infrared Vision

Quality evaluation of agricultural and food products is important for processing, inventory control, and marketing. Fruit surface defects are important quality factors for the jujube industry, especially for high quality jujubes such as Xinjiang red jujube. This paper presents the development and test results of a machine vision system for automatic jujube surface defects detection. Unlike other near-infrared spectrometric approaches, the developed machine vision system uses reflective near-infrared image to evaluate jujube quality by analyzing two-dimensional images. Near-infrared image, vision algorithms and a variety of operational details of the system, including cameras, optics, illumination, and fruit carrier are presented. The complete machine vision system has been built, and the experimental results show that the designed machine vision system is feasible to detect the defects of jujubes.

scholarly journals JWST near infrared detectors: latest test results

2009 ◽  
Author(s):  
Erin C. Smith ◽  
Bernard J. Rauscher ◽  
David Alexander ◽  
Brian L. Clemons ◽  
Chuck Engler ◽  
...  
Keyword(s):  
Infrared Detectors ◽  
Near Infrared ◽  
Test Results

scholarly journals Detection of illegally added drugs in dietary supplements by near-infrared spectral imaging

2014 ◽  
Vol 07 (06) ◽  
pp. 1450032 ◽  
Author(s):  
Rui Zhang ◽  
Lihui Yin ◽  
Shaohong Jin
Keyword(s):  
Dietary Supplements ◽  
Correlation Coefficient ◽  
False Positive ◽  
Near Infrared ◽  
Spectral Imaging ◽  
Test Results ◽  
Infrared Spectral ◽  
Positive Results

The application to detect illegally added drugs in dietary supplements by near-infrared spectral imaging was studied with the focus on nifedipine, diclofenac and metformin. The method is based on near-infrared spectral images correlation coefficient to detect illegally added drugs. The results comply 100% with HPLC methods test results with no false positive results.

The performance test results for engineering model (EM) of thermal and near infrared sensor for carbon observation (TANSO) on GOSAT

2007 ◽  
Author(s):  
Hiroshi Suto ◽  
Takahiro Kawashima ◽  
Kei Shiomi ◽  
Tomoko Kina ◽  
Akihiko Kuze ◽  
...  
Keyword(s):  
Near Infrared ◽  
Performance Test ◽  
Test Results ◽  
Infrared Sensor ◽  
Engineering Model

Innovative On-Line Oil Sensor Technologies for the Condition Monitoring of Wind Turbines

2015 ◽  
Vol 644 ◽  
pp. 53-56 ◽  
Author(s):  
Eneko Gorritxategi ◽  
Alfredo García-Arribas ◽  
Ana Aranzabe
Keyword(s):  
Condition Monitoring ◽  
Wind Turbines ◽  
Near Infrared ◽  
Lubricating Oil ◽  
Oil Degradation ◽  
Test Results ◽  
Validation Test ◽  
Absorbance Spectroscopy ◽  
The Status ◽  
On Line

A description of a system, developed for the condition monitoring of wind turbines, which combines innovative, real time, and on-line oil sensor technologies is described. The system integrates the measurement of the three main parameters that assess the status of the lubricating oil in the lubrication system using different technologies: the degree of oil degradation using visible absorbance spectroscopy; the water content using near infrared spectroscopy; and the presence of wear debris using image processing technology. The measuring principles, sensor integration and validation test results obtained in artificially degraded oil samples are presented.

scholarly journals Euclid near infrared spectrophotometer instrument concept and first test results at the end of phase B

2014 ◽  
Author(s):  
Thierry Maciaszek ◽  
Anne Ealet ◽  
Knud Jahnke ◽  
Eric Prieto ◽  
Rémi Barbier ◽  
...  
Keyword(s):  
Near Infrared ◽  
Test Results ◽  
Infrared Spectrophotometer

The instrumentation and the BBM test results of thermal and near-infrared sensor for carbon observation (TANSO) on GOSAT

2006 ◽  
Author(s):  
Akihiko Kuze ◽  
Tomoyuki Urabe ◽  
Hiroshi Suto ◽  
Yutaka Kaneko ◽  
Takashi Hamazaki
Keyword(s):  
Near Infrared ◽  
Test Results ◽  
Infrared Sensor

scholarly journals Orthostatic Headache in Children Including Postural Tachycardia Syndrome and Orthostatic Hypotension: A Near-Infrared Spectroscopy Study

2020 ◽  
Vol 9 (12) ◽  
pp. 4125
Author(s):  
Soken Go ◽  
Gaku Yamanaka ◽  
Akiko Kasuga ◽  
Kanako Kanou ◽  
Tomoko Takamatsu ◽  
...  
Keyword(s):  
Neck Pain ◽  
Orthostatic Hypotension ◽  
Near Infrared ◽  
Orthostatic Headache ◽  
Postural Tachycardia Syndrome ◽  
Test Results ◽  
Spectroscopy Study ◽  
Postural Tachycardia ◽  
History Of ◽  
Organic Disorder

Background and aim: Although head and/or neck pain attributed to orthostatic hypotension is included in international guidelines, its mechanisms and relevance remain unknown. This study examined the term’s relevance and aimed to elucidate the associated clinical features. Methods: An active stand test was performed to evaluate fluctuations in systemic and cerebral circulation in children and adolescents reporting complaints in the absence of a confirmed organic disorder. The subjects were categorized based on orthostatic headache presence/absence, and their characteristics and test results were compared. Results: Postural tachycardia syndrome was observed in 50.0% of children with, and 55.1% without, orthostatic headache. For orthostatic hypotension, the respective values were 31.3% and 30.6%. A history of migraine was more prevalent in children with orthostatic headaches (64.1% vs. 28.6%; p < 0.01). The observed decrease in the cerebral oxygenated hemoglobin level was larger in children with orthostatic headaches (Left: 6.3 (3.2–9.4) vs. 4.1 (0.8–6.1); p < 0.01, Right: 5.3 (3.1–8.6) vs. 4.0 (0.8–5.9); p < 0.01). Conclusion: Fluctuations in cerebral blood flow were associated with orthostatic headaches in children, suggesting that the headaches are due to impaired intracranial homeostasis. As orthostatic headache can have multiple causes, the term “head and/or neck pain attributed to orthostatic (postural) hypotension” should be replaced with a more inclusive term.

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