A 5.5 megapixel high-performance low-light military video camera

2009 ◽  
Author(s):  
Gerald B. Heim ◽  
Brian Biesterfeld ◽  
Jon Burkepile ◽  
Wayne W. Frame ◽  
Tyson Harding ◽  
...  
Keyword(s):  
High Performance ◽  
Video Camera ◽  
Low Light

Simultaneous Nomarski and fluorescence imaging during video microscopy of cells

1988 ◽  
Vol 255 (4) ◽  
pp. C566-C571 ◽  
Author(s):  
J. K. Foskett
Keyword(s):  
Fluorescence Imaging ◽  
Fluorescence Emission ◽  
Video Camera ◽  
Light Level ◽  
Optical Path ◽  
Transmitted Light ◽  
Low Light ◽  
Dichroic Mirror ◽  
Wollaston Prism ◽  
Side Port

A video microscope designed to allow low light level fluorescence imaging of cells during simultaneous high-resolution differential interference contrast (DIC) imaging, without the fluorescence light losses of 60-90% normally associated with this contrast-enhancement technique, is described. Transmitted light for DIC imaging, filtered at greater than 620 nm, passes through standard DIC optical components, (1/4 lambda-plate, polarizer, and Wollaston prism) before illuminating the cells. Transmitted light and fluorescence emission pass through a second Wollaston prism but not through the analyzer, which is repositioned more distally in the optical path. Prisms designed to reflect light out a side port of the microscope to a video camera have been replaced with a dichroic mirror. This mirror reflects fluorescence emission out the side port to a low light-sensitive video camera. The spectrally distinct transmitted light continues through the dichroic mirror to an overhead camera through a polarizer (analyzer), which completes the DIC optical path. The fluorescence and DIC images can be viewed simultaneously on side-by-side video monitors, examined sequentially by an image-processing computer, or examined simultaneously using a video splitter/inserter. The ability to image cells with high resolution simultaneously with low light level fluorescence imaging should find wide applicability whenever it is necessary or desirable to correlate fluorescence intensity or distribution with specific cell structure or function.

scholarly journals Measurement and visual verification of fish target strength using an acoustic-optical system attached to a trawlnet

2009 ◽  
Vol 66 (6) ◽  
pp. 1238-1244 ◽  
Author(s):  
Tim E. Ryan ◽  
Rudy J. Kloser ◽  
Gavin J. Macaulay
Keyword(s):  
Optical System ◽  
Deep Water ◽  
Video Camera ◽  
Target Strength ◽  
Dual Frequency ◽  
Low Light ◽  
Orange Roughy ◽  
Video Images ◽  
Acoustic Target ◽  
Frequency Split

Abstract Ryan, T. E., Kloser, R. J., and Macaulay, G. J. 2009. Measurement and visual verification of fish target strength using an acoustic-optical system attached to a trawlnet. – ICES Journal of Marine Science, 66: 1238–1244. It is difficult to make acoustic target-strength (TS) measurements of fish behaving naturally in deep-water habitats. The fish may avoid the acoustic instrumentation, and, if measured, there is uncertainty about their species and their orientation relative to the incident sound. To address these issues, a novel acoustic-optical system (AOS) has been developed, which combines a battery-powered, dual-frequency, split-beam acoustic system with a low-light video camera. The AOS attaches to the headline of a commercial deep-water demersal trawlnet that herds fish past the AOS and to the codend. This paper describes initial trials of the AOS to measure calibrated TS of New Zealand orange roughy, validated with video images. The fish species were visually identified, and their behaviour and orientation were approximated. The trawl catch provided associated samples for species identification and measurements of their length and other biological metrics. The combination of acoustics and optics in a net-mountable system constitutes a powerful sampling tool with broader applications in fishery research and ecosystem investigations.

Day- and night-time parental investment by incubating Wilson's Plovers in a tropical environment

1995 ◽  
Vol 73 (5) ◽  
pp. 879-886 ◽  
Author(s):  
Michel Thibault ◽  
Raymond McNeil
Keyword(s):  
Breeding Season ◽  
Nest Predation ◽  
Time Lapse ◽  
Video Camera ◽  
Nest Attendance ◽  
Night Time ◽  
Low Light ◽  
Charadrius Wilsonia ◽  
Infrared Lamps ◽  
Time Lapse Video

With the use of a time-lapse video camera and infrared lamps, we quantified diurnal and nocturnal incubation sex roles in 17 pairs of Wilson's Plovers (Charadrius wilsonia cinnamominus) breeding in northeastern Venezuela. More than 82% of nests reached the hatching stage. Between the laying of the last egg and hatching of the first one, parents devoted 83% of their time incubating. Males spent more time incubating than females. Males incubated mainly at night and females mostly during daytime. Males also spent significantly more time incubating during daytime than did females during nighttime. During incubation, females relieved males at dawn and males relieved females at dusk. By relieving each other under conditions of low light intensity, parents probably reduced nest predation. Outside the breeding season, the Wilson's Plovers forage almost exclusively during nighttime. In contrast, during the breeding season, males foraged mainly during daytime low tides, probably as a consequence of their nocturnal nest attendance. During short daytime periods, on cloudy days, incubating plovers, particularly the females, abandoned their eggs to forage.

scholarly journals JOINTS ACTIVITY AND ITS ROLE IN THE UPPER EXTREMITY IN BADMINTON STROKES: A BIOMECHANICAL PERSPECTIVE OF SPORTS EDUCATION

2020 ◽  
Vol 8 (4) ◽  
pp. 522-529
Author(s):  
Mottakin Ahmed ◽  
G. D. Ghai
Keyword(s):  
Upper Extremity ◽  
Muscle Activity ◽  
Shoulder Joint ◽  
Elbow Joint ◽  
High Performance ◽  
Joint Angle ◽  
Wrist Joint ◽  
Video Camera ◽  
Total N ◽  
Practice Group

Purpose of the Study: This study aims to describe the muscle activity and its role in the upper extremity in Badminton Strokes and also investigates the Kinematics differences of Badminton forehand overhead shot, i.e., precise, smash and drop in wrist joint, elbow joint, and shoulder Joint from a biomechanics perspective. Methodology: Total [n=10] numbers of male badminton players were randomly selected from the badminton match practice group of L.N.I.P.E. Gwalior, Madhya Pradesh, India. The match practice group consisted of (n=78) players who at least participated in Inter-University badminton competition, and their age ranges from 17-25 years of old. Go Pro HERO 7, 2D camera was used. A video camera was mounted on a tripod at a height of 1.05 meters from the ground. 2D data of wrist joint, elbow joint, and shoulder joint were put in Kinovea 0.8.27 software. One way ANOVA was used. Principal Findings: The results of the finding demonstrate that Brain vibrations, paradoxically, are critical to the stability of movement and high performance. There are significant muscle activity and kinematics differences among forehand clear, forehand smash and forehand drop-in shoulder joint angle, elbow joint angle, and wrist joint angle. Applications of this Study: The Study may use by the badminton Players as well as coaches for the successful execution of badminton Skill. This study will provide the mechanical area of movement of badminton Players. The same kind of study may use in other games. Novelty/Originality of this Study: The Study explores the mechanical advantages of badminton forehand overhead Skill. It will give the reader new ideas to think of a similar kind of study in different games.

Automatic idexing of electron-backscatter diffraction patterns

1994 ◽  
Vol 52 ◽  
pp. 598-599
Author(s):  
S. I. Wright
Keyword(s):  
Feature Detection ◽  
Electron Backscatter Diffraction ◽  
Video Camera ◽  
Light Level ◽  
Lattice Orientation ◽  
Low Light ◽  
Diffraction Patterns ◽  
Digital Image Enhancement ◽  
Backscatter Diffraction

A typical Backscatter Kikuchi Diffraction pattern (BKD, also referred to in the literature as an EBSP or a BEKP) is shown in figure 1. Since the bands in the pattern represent planes in the diffracting volume, the lattice orientation can be determined from their geometrical arrangement. The task of correctly orienting a BKD can be broken into two parts: 1) finding the salient features in the pattern (either the diffraction bands or the intersections of the bands) and 2) using these features to determine the lattice orientation. Recent advances in feature detection in BKDs along with methods for digital image enhancement will be described in some detail. The determination of orientation from a set of detected bands (or intersections of bands) will also be discussed.Dingley has demonstrated that lattice orientation can be practically obtained from BKDs by imaging the diffraction patterns using a low light level video camera and indexing the patterns with the aid of an online computer.

High-performance digital color video camera

1992 ◽  
Vol 1 (1) ◽  
pp. 35 ◽  
Author(s):  
Kenneth A. Parulski
Keyword(s):  
High Performance ◽  
Video Camera ◽  
Color Video

scholarly journals Prenatal Diagnosis of Parvovirus B19-Induced Hydrops Fetalis by Chemiluminescence In Situ Hybridization

1999 ◽  
Vol 37 (7) ◽  
pp. 2326-2329 ◽  
Author(s):  
M. Musiani ◽  
P. Pasini ◽  
M. Zerbini ◽  
G. Gentilomi ◽  
A. Roda ◽  
...  
Keyword(s):  
In Situ Hybridization ◽  
High Performance ◽  
Parvovirus B19 ◽  
Light Level ◽  
Optical Microscope ◽  
Hydrops Fetalis ◽  
Low Light ◽  
Luminescent Signal ◽  
Cord Blood Cells

Parvovirus B19 can be transmitted transplacentally from the infected mother to the fetus during pregnancy, and hydrops fetalis, abortion, or stillbirth can result. In our study we explored the use of chemiluminescence in situ hybridization to detect B19 DNA on cord blood cells, amniotic fluid cells, and pleuric fluid cells from several cases of hydrops fetalis. B19 DNA was detected by using digoxigenin-labeled probes immunoenzymatically visualized with the chemiluminescent adamantil-1,2-dioxetane phenyl phosphate substrate for alkaline phosphatase. The luminescent signal emitted from the hybridized probes was detected, analyzed, and measured with a high-performance, low-light-level imaging luminograph connected to an optical microscope and to a personal computer for the quantification and localization of the chemiluminescent emission inside individual cells.

Low Light Affacting Alkaloids Accumulation and Related Biosynthetic Pathway Genes Expression in Leaves of Catharanthus roseus Seedlings

2014 ◽  
Vol 522-524 ◽  
pp. 311-315
Author(s):  
Ying Liu ◽  
De Wen Li ◽  
Zhong Hua Zhang ◽  
Yuan Gang Zu
Keyword(s):  
Gene Expression ◽  
Catharanthus Roseus ◽  
High Performance ◽  
Light Condition ◽  
Content Increase ◽  
Biosynthesis Pathway ◽  
Expression Change ◽  
Low Light ◽  
Plastic Films ◽  
Genes Expression

The alkaloids contents were investigated by High performance liquid chromatography (HPLC) in Catharanthus roseus aseptic seedlings leaves, the expressions of terpenoid indole alkaloids (TIAs) biosynthesis pathway genes were detected by semi-quantitative RT-PCR. The plastic films treatment induces a low light condition. HPLC analysis shows, the contents of vindoline (VIN) and catharanthine (CAT) are slight increase first and significant decrease (p<0.05) under plastic films, the vinblastine (VBL) content increase and reach the maximum (0.028 mg g-1±0.0051) on the 15th day of treatment. TIA biosynthesis pathway genes expression change under low light. The correlation analysis indicates, VIN accumulation is significantly correlated with the gene expression of desacetoxyvindoline-4-hydroxylase (D4h) and deacetylvindoline-4-O-acetyl transferase (Dat), and CAT accumulation is significantly correlated with strictosidine synthase (Str) gene expression (p<0.05). The low light treatment with plastic films accelerates the accumulation of VBL in C. roseus seedlings leaves.

Application of a low-light imaging device and chemiluminescent substrates for quantitative detection of viral DNA in hybridization reactions

1995 ◽  
Vol 41 (12) ◽  
pp. 1693-1697 ◽  
Author(s):  
S Girotti ◽  
M Musiani ◽  
P Pasini ◽  
E Ferri ◽  
G Gallinella ◽  
...  
Keyword(s):  
High Performance ◽  
Blot Hybridization ◽  
Clinical Samples ◽  
Quantitative Detection ◽  
Dot Blot ◽  
Low Light ◽  
Imaging Device ◽  
Detection Systems ◽  
B19 Parvovirus ◽  
Hybridization Test

Abstract In this quantitative dot-blot hybridization assay for detecting B19 parvovirus DNA, we used three different chemiluminescent substrates [adamantyl-1,2-dioxetane phenyl phosphates (PPD and the new PPD-Plus) and the chloro-5-substituted adamantyl-1,2-dioxetane phosphate (CSPD) plus Emerald enhancer] and a high-performance, low-intensity-light imaging luminograph apparatus. The hybridization test uses digoxigenin-labeled DNA probes, which are immunoenzymatically revealed by anti-digoxigenin Fab fragments conjugated with alkaline phosphatase. All the detection systems with the various chemiluminescent substrates gave sensitive and reproducible results for calibrators and positive or negative reference clinical samples, with high reproducibility (CV 4-17%). The signal was measured after 45 min of incubation. The luminograph apparatus could detect 10 fg of homologous DNA with the PPD-Plus substrate, whereas the detection limit with the CSPD and PPD substrates was 20 fg and 20-50 fg, respectively. Analysis of 26 samples with the three substrates showed good sensitivity and specificity for viral detection.

High-performance digital color video camera

1991 ◽  
Author(s):  
Kenneth A. Parulski ◽  
Brian L. Benamati ◽  
Lionel J. D'Luna ◽  
Paul R. Shelley
Keyword(s):  
High Performance ◽  
Video Camera ◽  
Color Video
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