keyword
MENU ▼
Read by QxMD icon Read
search

Night vision

keyword
https://www.readbyqxmd.com/read/29670119/atomically-thin-noble-metal-dichalcogenide-a-broadband-mid-infrared-semiconductor
#1
Xuechao Yu, Peng Yu, Di Wu, Bahadur Singh, Qingsheng Zeng, Hsin Lin, Wu Zhou, Junhao Lin, Kazu Suenaga, Zheng Liu, Qi Jie Wang
The interest in mid-infrared technologies surrounds plenty of important optoelectronic applications ranging from optical communications, biomedical imaging to night vision cameras, and so on. Although narrow bandgap semiconductors, such as Mercury Cadmium Telluride and Indium Antimonide, and quantum superlattices based on inter-subband transitions in wide bandgap semiconductors, have been employed for mid-infrared applications, it remains a daunting challenge to search for other materials that possess suitable bandgaps in this wavelength range...
April 18, 2018: Nature Communications
https://www.readbyqxmd.com/read/29662052/ultra-thin-high-efficiency-mid-infrared-transmissive-huygens-meta-optics
#2
Li Zhang, Jun Ding, Hanyu Zheng, Sensong An, Hongtao Lin, Bowen Zheng, Qingyang Du, Gufan Yin, Jerome Michon, Yifei Zhang, Zhuoran Fang, Mikhail Y Shalaginov, Longjiang Deng, Tian Gu, Hualiang Zhang, Juejun Hu
The mid-infrared (mid-IR) is a strategically important band for numerous applications ranging from night vision to biochemical sensing. Here we theoretically analyzed and experimentally realized a Huygens metasurface platform capable of fulfilling a diverse cross-section of optical functions in the mid-IR. The meta-optical elements were constructed using high-index chalcogenide films deposited on fluoride substrates: the choices of wide-band transparent materials allow the design to be scaled across a broad infrared spectrum...
April 16, 2018: Nature Communications
https://www.readbyqxmd.com/read/29626144/safest-light-in-a-combat-area-while-performing-intravenous-access-in-the-dark
#3
Attila Aydin, S Bilge, M Eryilmaz
INTRODUCTION: Cannulation for the administration of intravenous fluids is integral to the prehospital management of injured military patients. However, this may be technically challenging to undertake during night-time conditions where the use of light to aid cannulation may give the tactical situation away to opponents. The aim of this study was to investigate the success and tactical safety of venepuncture under battlefield conditions with different colour light sources. METHOD: The procedure was carried out with naked eye in a bright room in the absence of a separate light source, with a naked eye in a dark room under red, white, blue and green light sources and under an infrared light source while wearing night vision goggles (NVGs)...
April 6, 2018: Journal of the Royal Army Medical Corps
https://www.readbyqxmd.com/read/29625217/the-expression-of-three-opsin-genes-and-phototactic-behavior-of-spodoptera-exigua-lepidoptera-noctuidae-evidence-for-visual-function-of-opsin-in-phototaxis
#4
Yan-Jun Liu, Shuo Yan, Zhong-Jian Shen, Zhen Li, Xin-Fang Zhang, Xiao-Ming Liu, Qing-Wen Zhang, Xiao-Xia Liu
Phototaxis in nocturnal moths is widely utilized to control pest populations in practical production. However, as an elusive behavior, phototactic behavior is still not well understood. Determination of whether the opsin gene plays a key role in phototaxis is an interesting topic. This study was conducted to analyze expression levels and biological importance of three opsin genes (Se-uv, Se-bl, and Se-lw) and phototactic behavior of Spodoptera exigua. The three opsin genes exhibited higher expression levels during daytime, excluding Se-bl in females, whose expression tended to increase at night...
April 3, 2018: Insect Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/29615777/a-comparative-analysis-of-rod-bipolar-cell-transcriptomes-identifies-novel-genes-implicated-in-night-vision
#5
Sasha M Woods, Edward Mountjoy, Duncan Muir, Sarah E Ross, Denize Atan
In the mammalian retina, rods and a specialised rod-driven signalling pathway mediate visual responses under scotopic (dim light) conditions. As rods primarily signal to rod bipolar cells (RBCs) under scoptic conditions, disorders that affect rod or RBC function are often associated with impaired night vision. To identify novel genes expressed by RBCs and, therefore, likely to be involved in night vision, we took advantage of the adult Bhlhe23-/- mouse retina (that lacks RBCs) to derive the RBC transcriptome...
April 3, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29603671/penguin-colony-attendance-under-artificial-lights-for-ecotourism
#6
Airam Rodríguez, Ross Holmberg, Peter Dann, André Chiaradia
Wildlife watching is an emerging ecotourism activity around the world. In Australia and New Zealand, night viewing of little penguins attracts hundreds of thousands of visitors per year. As penguins start coming ashore after sunset, artificial lighting is essential to allow visitors to view them in the dark. This alteration of the nightscape warrants investigation for any potential effects of artificial lighting on penguin behavior. We experimentally tested how penguins respond to different light wavelengths (colors) and intensities to examine effects on the colony attendance behavior at two sites on Phillip Island, Australia...
March 30, 2018: Journal of Experimental Zoology. Part A, Ecological and Integrative Physiology
https://www.readbyqxmd.com/read/29599655/dark-matters-challenges-of-nocturnal-communication-between-plants-and-animals-in-delivery-of-pollination-services
#7
REVIEW
Renee M Borges
The night is a special niche characterized by dim light, lower temperatures, and higher humidity compared to the day. Several animals have made the transition from the day into the night and have acquired unique adaptations to cope with the challenges of performing nocturnal activities. Several plant species have opted to bloom at night, possibly as a response to aridity to prevent excessive water loss through evapotranspiration since flowering is often a water-demanding process, or to protect pollen from heat stress...
March 2018: Yale Journal of Biology and Medicine
https://www.readbyqxmd.com/read/29597005/non-syndromic-retinitis-pigmentosa
#8
REVIEW
Sanne K Verbakel, Ramon A C van Huet, Camiel J F Boon, Anneke I den Hollander, Rob W J Collin, Caroline C W Klaver, Carel B Hoyng, Ronald Roepman, B Jeroen Klevering
Retinitis pigmentosa (RP) encompasses a group of inherited retinal dystrophies characterized by the primary degeneration of rod and cone photoreceptors. RP is a leading cause of visual disability, with a worldwide prevalence of 1:4000. Although the majority of RP cases are non-syndromic, 20-30% of patients with RP also have an associated non-ocular condition. RP typically manifests with night blindness in adolescence, followed by concentric visual field loss, reflecting the principal dysfunction of rod photoreceptors; central vision loss occurs later in life due to cone dysfunction...
March 26, 2018: Progress in Retinal and Eye Research
https://www.readbyqxmd.com/read/29587378/green-grape-detection-and-picking-point-calculation-in-a-night-time-natural-environment-using-a-charge-coupled-device-ccd-vision-sensor-with-artificial-illumination
#9
Juntao Xiong, Zhen Liu, Rui Lin, Rongbin Bu, Zhiliang He, Zhengang Yang, Cuixiao Liang
Night-time fruit-picking technology is important to picking robots. This paper proposes a method of night-time detection and picking-point positioning for green grape-picking robots to solve the difficult problem of green grape detection and picking in night-time conditions with artificial lighting systems. Taking a representative green grape named Centennial Seedless as the research object, daytime and night-time grape images were captured by a custom-designed visual system. Detection was conducted employing the following steps: (1) The RGB (red, green and blue)...
March 25, 2018: Sensors
https://www.readbyqxmd.com/read/29577945/effect-of-experience-equipment-and-fire-actions-in-psychophysiological-response-and-memory-of-soldiers-in-actual-underground-operations
#10
José Francisco Tornero-Aguilera, Vicente Javier Clemente-Suárez
The present study aimed to analyze the effect of underground operations on the psychophysiological and memory response of soldiers taking into consideration experience, the use of nocturne vision systems and previous combat actions on the psychophysiological response. Seventy participants were recruited and divided in four groups, three experimental groups with different experimental conditions, SNFV (Soldiers No-Fire Night-Vision), SFV (Soldiers Fire Night-Vision), SNFNV (Soldiers No-Fire No Night-Vision), and one control group, CNFV (Control No-Fire Night-Vision)...
March 22, 2018: International Journal of Psychophysiology
https://www.readbyqxmd.com/read/29569679/the-success-of-endotracheal-intubation-with-a-modified-laryngoscope-using-night-vision-goggles
#11
Attila Aydın, Sedat Bilge, Cemile Aydın, Meltem Bilge, Erdem Çevik, Mehmet Eryılmaz
BACKGROUND: Endotracheal intubation (ETI) procedure in the combat area differs from prehospital trauma life support procedures because of the danger of gunfire and the dark environment. We aimed to determine the success, difficulty degree, and duration of ETI procedures with a classical laryngoscope (CL) in a bright room and with a modified laryngoscope (ML) model in a dark room. METHODS: All interventions were performed by a combatant medical staff of 10 members...
March 2018: Ulusal Travma Ve Acil Cerrahi Dergisi, Turkish Journal of Trauma & Emergency Surgery: TJTES
https://www.readbyqxmd.com/read/29554055/reversible-nyctalopia-associated-with-vitamin-a-deficiency-after-resected-malignant-ileal-carcinoid-and-pancreatic-adenocarcinoma
#12
Bradley A Hansen, Carlos E Mendoza-Santiesteban, Thomas R Hedges
PURPOSE: To describe the rapid time course of visual and electroretinographic recovery from vitamin A deficiency in a patient with a history of multiple resected abdominal tumors, including ileal carcinoid and pancreatic adenocarcinoma. METHODS: A 61-year-old white man with a history of resected malignant ileal carcinoid and Stage III pancreatic adenocarcinoma referred with complaints of 6 weeks of difficulty with night vision. RESULTS: Initial testing showed significantly reduced scotopic rod responses in both eyes and decreased vitamin A levels and a normal cancer-associated retinopathy laboratory panel...
April 2018: Retinal Cases & Brief Reports
https://www.readbyqxmd.com/read/29515430/bitot-s-spots-following-bariatric-surgery-an-ocular-manifestation-of-a-systemic-disease
#13
Amanda R Crum, Divya Srikumaran, Fasika Woreta
Background: To present a case of ocular complications from vitamin A deficiency following bariatric surgery. Case Report: A 41-year-old woman presented with symptoms of dryness and diminished night vision. Examination revealed corneal punctate staining, keratinization of the conjunctiva, and multiple mid-peripheral white lesions at the level of the retinal pigment epithelium. Given the patient's history of bariatric surgery, anemia, and vitamin D deficiency, further investigation into micronutrient levels was performed and indicated a severe vitamin A deficiency...
September 2017: Case Reports in Ophthalmology
https://www.readbyqxmd.com/read/29499467/adverse-physiological-and-psychological-effects-of-screen-time-on-children-and-adolescents-literature-review-and-case-study
#14
Gadi Lissak
A growing body of literature is associating excessive and addictive use of digital media with physical, psychological, social and neurological adverse consequences. Research is focusing more on mobile devices use, and studies suggest that duration, content, after-dark-use, media type and the number of devices are key components determining screen time effects. Physical health effects: excessive screen time is associated with poor sleep and risk factors for cardiovascular diseases such as high blood pressure, obesity, low HDL cholesterol, poor stress regulation (high sympathetic arousal and cortisol dysregulation), and Insulin Resistance...
February 27, 2018: Environmental Research
https://www.readbyqxmd.com/read/29468679/remote-treatment-of-sleep-related-trichotillomania-and-trichophagia
#15
Katherine R Lichtblau, Patrick W Romani, Brian D Greer, Wayne W Fisher, Allie K Bragdon
We used a biobehavioral treatment consisting of melatonin and a standardized bed and wake time to decrease one girl's head and mouth touches associated with sleep-related trichotillomania and trichophagia. We remotely coached the girl's caregiver to implement all procedures and monitored response to treatment using a DropCam Pro video camera equipped with night-vision capabilities. Head and mouth touches decreased, and her sleep pattern improved with the combination of treatment strategies. We discuss our use of a novel mode of service delivery to treat sleep-related problem behavior...
February 21, 2018: Journal of Applied Behavior Analysis
https://www.readbyqxmd.com/read/29425391/incidence-and-outcomes-of-optical-zone-enlargement-and-recentration-after-previous-myopic-lasik-by-topography-guided-custom-ablation
#16
Dan Z Reinstein, Timothy J Archer, Glenn I Carp, Alastair J Stuart, Elizabeth L Rowe, Andrew Nesbit, Tara Moore
PURPOSE: To report the incidence, visual and refractive outcomes, optical zone enlargement, and recentration using topography-guided CRS-Master TOSCA II software with the MEL 80 excimer laser (Carl Zeiss Meditec AG, Jena, Germany) after primary myopic laser refractive surgery. METHODS: Retrospective analysis of 73 eyes (40 patients) with complaints of night vision disturbances due to either a decentration or small optical zone following a primary myopic laser refractive surgery procedure using the MEL 80 laser...
February 1, 2018: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/29410641/rapid-adaptation-of-night-vision
#17
Adam Reeves, Rebecca Grayhem, Alex D Hwang
Apart from the well-known loss of color vision and of foveal acuity that characterizes human rod-mediated vision, it has also been thought that night vision is very slow (taking up to 40 min) to adapt to changes in light levels. Even cone-mediated, daylight, vision has been thought to take 2 min to recover from light adaptation. Here, we show that most, though not all adaptation is rapid, taking less than 0.6 s. Thus, monochrome (black-white-gray) images can be presented at mesopic light levels and be visible within a few 10th of a second, even if the overall light level, or level of glare (as with passing headlamps while driving), changes abruptly...
2018: Frontiers in Psychology
https://www.readbyqxmd.com/read/29353330/leveraging-variable-sensor-spatial-acuity-with-a-homogeneous-multi-scale-place-recognition-framework
#18
Adam Jacobson, Zetao Chen, Michael Milford
Most robot navigation systems perform place recognition using a single-sensor modality and one, or at most two heterogeneous map scales. In contrast, mammals perform navigation by combining sensing from a wide variety of modalities including vision, auditory, olfactory and tactile senses with a multi-scale, homogeneous neural map of the environment. In this paper, we develop a multi-scale, multi-sensor system for mapping and place recognition that combines spatial localization hypotheses at different spatial scales from multiple different sensors to calculate an overall place recognition estimate...
January 20, 2018: Biological Cybernetics
https://www.readbyqxmd.com/read/29326851/recent-advancements-in-gene-therapy-for-hereditary-retinal-dystrophies
#19
REVIEW
Ayşe Öner
Hereditary retinal dystrophies (HRDs) are degenerative diseases of the retina which have marked clinical and genetic heterogeneity. Common presentations among these disorders include night or colour blindness, tunnel vision, and subsequent progression to complete blindness. The known causative disease genes have a variety of developmental and functional roles, with mutations in more than 120 genes shown to be responsible for the phenotypes. In addition, mutations within the same gene have been shown to cause different disease phenotypes, even amongst affected individuals within the same family, highlighting further levels of complexity...
December 2017: Turkish Journal of Ophthalmology
https://www.readbyqxmd.com/read/29311648/auditory-opportunity-and-visual-constraint-enabled-the-evolution-of-echolocation-in-bats
#20
Jeneni Thiagavel, Clément Cechetto, Sharlene E Santana, Lasse Jakobsen, Eric J Warrant, John M Ratcliffe
Substantial evidence now supports the hypothesis that the common ancestor of bats was nocturnal and capable of both powered flight and laryngeal echolocation. This scenario entails a parallel sensory and biomechanical transition from a nonvolant, vision-reliant mammal to one capable of sonar and flight. Here we consider anatomical constraints and opportunities that led to a sonar rather than vision-based solution. We show that bats' common ancestor had eyes too small to allow for successful aerial hawking of flying insects at night, but an auditory brain design sufficient to afford echolocation...
January 8, 2018: Nature Communications
keyword
keyword
28139
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"