scholarly journals NEW METHODS FOR STUDYING THE ACTIVITY OF SEMIAQUATIC MAMMALS

2019 ◽  
Vol 16 (32) ◽  
pp. 27-33
Author(s):  
A. ANDREYCHEV
Keyword(s):  
Mean Amplitude ◽  
Night Vision ◽  
New Method ◽  
Night Time ◽  
Time Intervals ◽  
New Methods ◽  
Burrow Entrance ◽  
Semiaquatic Mammals ◽  
Underground Passage ◽  
Voice Recorder

A new method for studying the activity of semiaquatic mammals using digital portable voice recorders has been developed. Previously, actographs and night-vision devices were used to study semiaquatic mammals near their burrows. This method allows the mammal activity registration directly in the burrows. The use of voice recorders makes it possible to accurately determine whether the burrow system is inhabited or non-inhabited. In addition, it has become possible to identify the day-night time intervals during which the animals are the most or least active. The new method was tested on the Russian desman (Desmana moschata). Therefore, to identify the burrows in which the recorders were to be installed, the burrows were probed. A probe is a pole pointed at one end with a T-shaped handle at the other end. The researcher's task is to detect the entrance to the burrow, usually under water. And then the direction of the underground passage is determined by means of the probe. For this purpose, the ground is pierced to detect the hollows in the burrow with the probe starting from the burrow entrance (the probe falls through unevenly). At a distance of 2–3 meters from the burrow, in some cases largely depending on the burrow length, the ground is dug up above the burrow in the form of a small well, 10–15 cm in diameter. A digital voice recorder was placed vertically in this well, so that the microphone was directed down towards the burrow. Desman noises can be characterized as short series formed as a sequence of contiguous short peaks of 15–25 seconds with 5 second interruptions formed by regular waves of breathing and its movement noises. Desman noises differ by mean amplitude and duration on oscillograms. As a rule, the noise audibility ranges from 1 to 3 minutes.

scholarly journals Night-Time Vehicle Sensing in Far Infrared Image with Deep Learning

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Hai Wang ◽  
Yingfeng Cai ◽  
Xiaobo Chen ◽  
Long Chen
Keyword(s):  
Detection Rate ◽  
False Positive Rate ◽  
Infrared Image ◽  
Far Infrared ◽  
Night Vision ◽  
Infrared Sensors ◽  
Night Time ◽  
Detection Rates ◽  
Positive Rate ◽  
And Performance

The use of night vision systems in vehicles is becoming increasingly common. Several approaches using infrared sensors have been proposed in the literature to detect vehicles in far infrared (FIR) images. However, these systems still have low vehicle detection rates and performance could be improved. This paper presents a novel method to detect vehicles using a far infrared automotive sensor. Firstly, vehicle candidates are generated using a constant threshold from the infrared frame. Contours are then generated by using a local adaptive threshold based on maximum distance, which decreases the number of processing regions for classification and reduces the false positive rate. Finally, vehicle candidates are verified using a deep belief network (DBN) based classifier. The detection rate is 93.9% which is achieved on a database of 5000 images and video streams. This result is approximately a 2.5% improvement on previously reported methods and the false detection rate is also the lowest among them.

Direct amidation of acid fluorides using germanium amides

2021 ◽  
Author(s):  
Ardalan Hayatifar ◽  
Emily Elifritz ◽  
Molly Bloom ◽  
Kaitlyn Pixley ◽  
Chris Fennell ◽  
...  
Keyword(s):  
Functional Groups ◽  
New Method ◽  
New Methods ◽  
Acid Fluorides ◽  
Direct Amidation

Amide functional groups are an essential linkage that are found in peptides, proteins, and pharmaceuticals and new methods are constantly being sought for their formation. Here, a new method is...

scholarly journals Eye Controlled Robotic Chair with Night Vision Camera

2018 ◽  
Vol 7 (2.7) ◽  
pp. 536
Author(s):  
G Harish Babu ◽  
Dr N. Venkatram
Keyword(s):  
Ultrasonic Sensor ◽  
Night Vision ◽  
Light Conditions ◽  
Night Time ◽  
Emergency Situations ◽  
The People ◽  
Wheel Chair

According to Census 2011, in India the population is 121 Cr, from the aggregate residents 2.68 Cr individuals are impaired i.e 2.21 percent of the aggregate residents. From the 2.68 Cr impaired individuals 20 percent of the people disability in movement. Our project is an attempt to make lives of the people suffering from this phenomenon simple. In this framework controlling of wheel chair is depends upon the movements of patient’s Eye [1].  A camera is placed before the user, to catch the picture of the eye & footmarks the locale of eye pupil.  Camera used here is Night vision camera which works during night time and as well as daytime and will also work during low lightings. As per the position of eye pupil, wheel chair will be coordinated to move left, appropriate, forward and in reverse. The previous algorithms which are developed for this type of project doesn’t support for the people with squint eye and supports only for the people with 2 perfect pupils, and those algorithms are works only in clear light conditions but this project supports for the people with squint eye as well as people with 2 perfect pupils and works during low lightings. The person can stop the chair by closing his eyes whenever he needs. Moreover, a ultrasonic sensor is ascended in front, so that it can recognize the snags and naturally stop the wheel chair. A GPS module is inserted which finds the location of the wheel chair. A GSM module is inserted which sends the messages in case of emergency situations.  This project provides an option called voice module which is inserted and works based on the commands of the patients.  

scholarly journals New methods of investigation of the external base of skull at fatal injuries inpassenger compartment

2007 ◽  
Vol 6 (4) ◽  
pp. 91-94
Author(s):  
A. B. Shadymov ◽  
A. S. Novosyolov
Keyword(s):  
Soft Tissues ◽  
New Method ◽  
Motor Vehicles ◽  
Skull Fractures ◽  
Passenger Compartment ◽  
Mechanism Of Formation ◽  
New Methods ◽  
Base Of Skull ◽  
Facial Soft Tissues ◽  
Fatal Injuries

Basal skull fractures are frequent and cause certain difficulties in detection of the mechanism of their formation. Common dissecting methods do not allow detailed study of the external base of skull and deform facial soft tissues. A new method is developed, which allows determining the mechanism of formation of constructional fractures of the basal skull and pterygoid processes at various injuries, in particular, inside a passenger compartment at headon collision of motor vehicles. The method is registered as an invention.

scholarly journals Bulk partitioning the growing season net ecosystem exchange of CO<sub>2</sub> in Siberian tundra reveals the seasonality of its carbon sequestration strength

2012 ◽  
Vol 9 (10) ◽  
pp. 13713-13742 ◽  
Author(s):  
B. R. K. Runkle ◽  
T. Sachs ◽  
C. Wille ◽  
E.-M. Pfeiffer ◽  
L. Kutzbach
Keyword(s):  
Carbon Sink ◽  
Ecosystem Respiration ◽  
Growing Season ◽  
New Method ◽  
Apparent Temperature ◽  
The Arctic ◽  
Co2 Uptake ◽  
Night Time ◽  
Tundra Ecosystem ◽  
Co2 Sink

Abstract. This paper evaluates the relative contribution of light and temperature on net ecosystem CO2 uptake during the 2006 growing season in a~polygonal tundra ecosystem in the Lena River Delta in Northern Siberia (72°22´ N, 126°30´ E). We demonstrate that the timing of warm periods may be an important determinant of the magnitude of the ecosystem's carbon sink function, as they drive temperature-induced changes in respiration. Hot spells during the early portion of the growing season are shown to be more influential in creating mid-day surface-to-atmosphere net ecosystem CO2 exchange fluxes than those occurring later in the season. In this work we also develop and present a bulk flux partition model to better account for tundra plant physiology and the specific light conditions of the arctic region that preclude the successful use of traditional partition methods that derive a respiration-temperature relationship from all night-time data. Night-time, growing season measurements are rare during the arctic summer, however, so the new method allows for temporal variation in the parameters describing both ecosystem respiration and gross uptake by fitting both processes at the same time. Much of the apparent temperature sensitivity of respiration seen in the traditional partition method is revealed in the new method to reflect seasonal changes in basal respiration rates. Understanding and quantifying the flux partition is an essential precursor to describing links between assimilation and respiration at different time scales, as it allows a more confident evaluation of measured net exchange over a broader range of environmental conditions. The growing season CO2 sink estimated by this study is similar to those reported previously for this site, and is substantial enough to withstand the long, low-level respiratory CO2 release during the rest of the year to maintain the site's CO2 sink function on an annual basis.

scholarly journals EXPERIMENTAL MODELING OF FROSTBITES OF VARYING SEVERITY IN LABORATORY ANIMALS. PART 2. MORPHOLOGICAL ASSESSMENT OF THE EFFECTIVENESS OF THE DEVICE FOR SIMULATING CONTACT FROSTBITE

2021 ◽  
Vol 19 (1) ◽  
pp. 46-54
Author(s):  
A. L. Valentyukevich ◽  
◽  
V. D. Melamed ◽  
N. I. Prokopchik ◽  
◽  
...  
Keyword(s):  
Experimental Model ◽  
Experimental Modeling ◽  
Laboratory Animals ◽  
Time Intervals ◽  
Laboratory Rats ◽  
New Methods ◽  
Morphological Research ◽  
Morphological Assessment

Background. The study of new methods of treating frostbite is feasible using an experimental model, the effectiveness of which is confirmed by morphological results. Purpose of the study. Morphological substantiation of the effectiveness of the developed device for simulating contact frostbites of varying severity. Material and methods. In 30 laboratory rats, the designed device was used to simulate cold trauma of varying severity. The material for morphological research was collected at different time intervals. Results. Morphological argumentation of the effectiveness of the created device for reproducing both superficial and deep frostbites is presented. Conclusions. The developed device is not difficult to manufacture; it is safe and allows reproducing standardized contact frostbites of varying severity in laboratory animals.

New methods for projecting a 3D object onto a free-form surface

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Jingyu Pei ◽  
Xiaoping Wang ◽  
Leen Zhang ◽  
Yu Zhou ◽  
Jinyuan Qian
Keyword(s):  
Approximate Solution ◽  
New Method ◽  
Free Form ◽  
Parallel Projection ◽  
Content Type ◽  
3D Object ◽  
New Methods ◽  
Free Form Surface ◽  
Newton Raphson ◽  
Raphson Iteration

Purpose This paper aims to provide a series of new methods for projecting a three-dimensional (3D) object onto a free-form surface. The projection algorithms presented can be divided into three types, namely, orthogonal, perspective and parallel projection. Design/methodology/approach For parametric surfaces, the computing strategy of the algorithm is to obtain an approximate solution by using a geometric algorithm, then improve the accuracy of the approximate solution using the Newton–Raphson iteration. For perspective projection and parallel projection on an implicit surface, the strategy replaces Newton–Raphson iteration by multi-segment tracing. The implementation takes two mesh objects as an example of calculating an image projected onto parametric and implicit surfaces. Moreover, a comparison is made for orthogonal projections with Hu’s and Liu’s methods. Findings The results show that the new method can solve the 3D objects projection problem in an effective manner. For orthogonal projection, the time taken by the new method is substantially less than that required for Hu’s method. The new method is also more accurate and faster than Liu’s approach, particularly when the 3D object has a large number of points. Originality/value The algorithms presented in this paper can be applied in many industrial applications such as computer aided design, computer graphics and computer vision.

scholarly journals An improved method for preparation of mouse retinal cryosections

2020 ◽  
Vol 64 (3) ◽  
Author(s):  
Ling Li ◽  
Yongqiong Lin ◽  
Fang Yang ◽  
Tongdan Zou ◽  
Jialiang Yang ◽  
...  
Keyword(s):  
Retinal Detachment ◽  
Vision Research ◽  
New Method ◽  
Specific Marker ◽  
Improved Method ◽  
High Quality ◽  
New Methods ◽  
Modified Method ◽  
Routine Assay ◽  
Super Glue

Immunohistochemistry using mouse retinal cryosections is a routine assay used in vision research. However, retinal tissues are fragile, and it is difficult to obtain an ideal retinal cryosection. Here, we developed a modified method for preparing retinal cryosection. Super Glue was applied on the surface of the sclera before the cornea and the lens are removed from either the unfixed or PFA-fixed mouse eyeballs. The new methods largely prevented retinal detachment in mouse retinal cryosections. Immunostaining of retinal cryosections derived from PFA-fixed mouse eyes using rod and cone markers yielded high-quality immunofluorescent images. Immunolabeling of retinal cryosections obtained from unfixed mouse eyes using a cilium-specific marker had improved orientations of photoreceptor connecting cilia. This new method substantially improves the morphology and immunostaining results of fixed and unfixed mouse eyes.

The “layered method” – A third method of floodlighting

2019 ◽  
Vol 52 (5) ◽  
pp. 641-653 ◽  
Author(s):  
W Żagan ◽  
K Skarżyński
Keyword(s):  
Short Distance ◽  
State Of The Art ◽  
Rapid Development ◽  
Light Distribution ◽  
New Method ◽  
Night Time ◽  
Visual Effect ◽  
Lighting Technology ◽  
Advantages And Disadvantages ◽  
Light Line

The main aim of this work is to present a new method of floodlighting – the ‘Layered Method’. It has been possible to create this method due to the rapid development of linear luminaires with LEDs. When luminaires are located a very short distance from an illuminated wall and are directed at a low angle, the layered floodlighting method gives an unusual and interesting visual effect. In this situation, the length of light distribution on the illuminated wall is the same as the length of the light line and is rather short in width. This gives the opportunity of creating the effect of a layer of light, which can be used, for example, to illuminate Renaissance tenement houses and all types of longitudinal architectural details, such as tympanums or balusters. This paper presents the state-of-the-art use of the layered method of floodlighting. All advantages and disadvantages, in terms of lighting technology and architecture, are carefully described. The ideas contained in this paper could be useful for those who are interested in making architectural objects more beautiful by means of illumination at night-time.

scholarly journals Detecting Variable Resistance by Fluorescence Intensity Ratio Technology

Sensors ◽  
2019 ◽  
Vol 19 (10) ◽  
pp. 2400 ◽  
Author(s):  
Wanjun Sheng ◽  
Xiangfu Wang ◽  
Yong Tao ◽  
Xiaohong Yan
Keyword(s):  
Fluorescence Intensity ◽  
Intensity Ratio ◽  
Negative Temperature ◽  
Relative Sensitivity ◽  
New Method ◽  
Fluorescence Intensity Ratio ◽  
Time Intervals ◽  
Variable Resistance ◽  
Reduced Graphene ◽  
Short Time

We report a new method for detecting variable resistance during short time intervals by using an optical method. A novel variable-resistance sensor composed of up-conversion nanoparticles (NaYF4:Yb3+,Er3+) and reduced graphene oxide (RGO) is designed based on characteristics of a negative temperature coefficient (NTC) resistive element. The fluorescence intensity ratio (FIR) technology based on green and red emissions is used to detect variable resistance. Combining the Boltzmann distributing law with Steinhart–Hart equation, the FIR and relative sensitivity SR as a function of resistance can be defined. The maximum value of SR is 1.039 × 10−3/Ω. This work reports a new method for measuring variable resistance based on the experimental data from fluorescence spectrum.

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