Automated Color Misalignment Correction for Close-Range and Long-Range Hyper-Resolution Multi-Line CCD Images

2013 ◽  
pp. 1-27
Author(s):  
Zhiyu Chen ◽  
Andreas Koschan ◽  
Chung-Hao Chen ◽  
Mongi Abidi
Keyword(s):  
Long Range ◽  
Close Range

scholarly journals Evaluation of Long-Range Mobile Mapping System (MMS) and Close-Range Photogrammetry for Deformation Monitoring. A Case Study of Cortes de Pallás in Valencia (Spain)

2020 ◽  
Vol 10 (19) ◽  
pp. 6831
Author(s):  
Francesco Di Stefano ◽  
Miriam Cabrelles ◽  
Luis García-Asenjo ◽  
José Luis Lerma ◽  
Eva Savina Malinverni ◽  
...  
Keyword(s):  
Long Range ◽  
New Technologies ◽  
3D Models ◽  
Deformation Monitoring ◽  
Mobile Mapping ◽  
Close Range Photogrammetry ◽  
Mapping System ◽  
Mobile Mapping System ◽  
Close Range ◽  
Landslide Deformation

This contribution describes the methodology applied to evaluate the suitability of a Long-Range Mobile Mapping System to be integrated with other techniques that are currently used in a large and complex landslide deformation monitoring project carried out in Cortes de Pallás, in Valencia (Spain). Periodical geodetic surveys provide a reference frame realized by 10 pillars and 15 additional check points placed in specific points of interest, all with millimetric accuracy. The combined use of Close-Range Photogrammetry provides a well-controlled 3D model with 1–3 cm accuracy, making the area ideal for testing new technologies. Since some zones of interest are usually obstructed by construction, trees, or lamp posts, a possible solution might be the supplementary use of dynamic scanning instruments with the mobile mapping solution Kaarta Stencil 2 to collect the missing data. However, the reliability of this technology has to be assessed and validated before being integrated into the existing 3D models in the well-controlled area of Cortes de Pallás. The results of the experiment show that the accuracy achieved are compatible with those obtained from Close-Range Photogrammetry and can also be safely used to supplement image-based information for monitoring with 3–8 cm overall accuracy.

Behavior of adult Simuliidae (Diptera). II. Vision and olfaction in near-orientation and landing

1974 ◽  
Vol 52 (11) ◽  
pp. 1355-1364 ◽  
Author(s):  
Wayne C. Bradbury ◽  
Gordon F. Bennett
Keyword(s):  
Long Range ◽  
Sensory Inputs ◽  
Middle Range ◽  
Source Models ◽  
Close Range

The number of simuliids orienting to a CO2 source decreased with distance downwind from the source. The responses of Simuliidae to attractive and non-attractive silhouettes and to CO2 revealed a marked ability of these insects to discriminate between targets during near-orientation on the basis of color, independent of the amount of CO2, and showed that vision was effective between 0 and 180 cm downwind from the CO2 source. Models of long-range, middle-range, and close-range orientation by blackflies are proposed in terms of the sensory inputs to which the flies respond during orientation to attractive targets.

The responses of Prostephanus truncatus (Coleoptera: Bostrichidae) and Sitophilus zeamais (Coleoptera: Curculionidae) to pheromone and synthetic maize volatiles as lures in crevice or flight traps

1998 ◽  
Vol 88 (2) ◽  
pp. 131-139 ◽  
Author(s):  
R.J. Hodges ◽  
D.R. Hall ◽  
J.N. Mbugua ◽  
P.W. Likhayo
Keyword(s):  
Sex Ratio ◽  
Long Range ◽  
Sitophilus Zeamais ◽  
Prostephanus Truncatus ◽  
Pheromone Traps ◽  
Trap Catch ◽  
Two Component ◽  
Close Range ◽  
T1 And T2

AbstractFlight traps and crevice traps for catching Prostephanus truncatus (Horn) and Sitophilus zeamais Motschulsky were studied in Kenya. The traps were baited with pheromones of these beetles, with or without synthetic maize volatiles. In the case of P. truncatus, which has a two component pheromone consisting of Trunc-call 1 (T1) and Trunc-call 2 (T2), the components were tested singly or in a 1:1 combination. The addition of synthetic maize volatiles to pheromone traps did not result in an increase in trap catch of either S. zeamais or P. truncatus. The pheromone of S. zeamais was an effective lure in both crevice and flight traps but the actual numbers captured were low. Captures with traps baited for P. truncatus were much greater. The response of P. truncatus to the two components of its pheromone was affected by the type of trap used. Crevice traps baited with either component alone caught fewer beetles than those baited with a mixture. In contrast, flight traps baited with T2 or the mixture were equally effective while traps with only T1 caught significantly fewer than either of these. These observations clarified apparent discrepancies between earlier studies in Tanzania and Mexico and are used to derive an hypothesis about the roles of T1 and T2; T2 appears to be a long-range attractant and T1 important for modifying the response to T2 to facilitate close-range orientation. Adult P. truncatus arriving at the traps were sexed, and in both flight and crevice traps the majority of captures were females even though in the experimental maize cribs the beetles were present in a roughly equal sex ratio. The role of the pheromone is discussed in the light of this observation.

Self-supervised free space estimation in outdoor terrain

Robotica ◽  
2018 ◽  
Vol 36 (9) ◽  
pp. 1278-1300
Author(s):  
Ali Harakeh ◽  
Daniel Asmar ◽  
Elie Shammas
Keyword(s):  
Supervised Learning ◽  
Long Range ◽  
Free Space ◽  
Robot Navigation ◽  
Unmanned Ground Vehicle ◽  
Essential Requirement ◽  
Ground Vehicle ◽  
Second Stage ◽  
Stochastic Framework ◽  
Close Range

SUMMARYThe ability to reliably estimate free space is an essential requirement for efficient and safe robot navigation. This paper presents a novel system, built upon a stochastic framework, which estimates free space quickly from stereo data, using self-supervised learning. The system relies on geometric data in the close range of the robot to train a second-stage appearance-based classifier for long range areas in a scene. Experiments are conducted on board an unmanned ground vehicle, and the results demonstrate the advantages of the proposed technique over other self-supervised systems.

Some Traps for Tsetse-flies

1933 ◽  
Vol 24 (1) ◽  
pp. 69-102 ◽  
Author(s):  
C. F. M. Swynnerton
Keyword(s):  
Long Range ◽  
Tsetse Flies ◽  
Close Range

1. More than twenty new forms and variations of tsetse traps are described in this paper for trial, and rejection or improvement, by other investigators. The species of tsetse-flies that they have been tested against have been palpalis, pallidipes, morsitans and swynnertoni.2. The reactions of the various tsetse-flies to different forms of trap vary in a marked manner. Thus a trap (the Harris) that is excellent for pallidipes has appeared less good, though fair, for palpalis, poor (except at one season) for morsitans, and useless for swynnertoni. Another (the SS and the SSB) is particularly excellent for palpalis, excellent for pallidipes, mediocre for swynnertoni, and perfectly useless for morsilans.3. Tsetses, pallidipes in particular of the two species tested, have been found to react also most strongly to the scent of an invisible animal placed in a trap. It is not known yet whether this attracts at a distance or is merely a close-range attraction, inciting the flies that have arrived in any case to such effort as takes them in larger numbers into the traps, but the latter does undoubtedly happen.4. If the attraction be long-range, the flies do not readily distinguish between the source of the odour and conspicuous objects within its range. They go to and into a trap, even a trap that usually does not catch them, in greatly enhanced numbers when cattle are in its neighbourhood.

scholarly journals INITIAL INVESTIGATION OF A LOW-COST AUTOMOTIVE LIDAR SYSTEM

2019 ◽  
Vol XLII-2/W17 ◽  
pp. 233-240
Author(s):  
A. Ortiz Arteaga ◽  
D. Scott ◽  
J. Boehm
Keyword(s):  
Long Range ◽  
Reference Values ◽  
Low Cost ◽  
Automated Detection ◽  
Ripple Effect ◽  
Lidar System ◽  
Terrestrial Lidar ◽  
Close Range ◽  
Series Of Experiments ◽  
Scan Pattern

Abstract. This investigation focuses on the performance assessment of a low-cost automotive LIDAR, the Livox Mid-40 series. The work aims to examine the qualities of the sensor in terms of ranging, repeatability and accuracy. Towards these aims a series of experiments were carried out based on previous research of low-cost sensor accuracy, LIDAR accuracy investigation and TLS calibration experiments. The Livox Mid-40 series offers the advantage of a long-range detection beyond 200 m at a remarkably low cost. The preliminary results of the tests for this sensor indicate that it can be used for reality capture purposes such as to obtain coarse as-built plans and volume calculations to mention a few. Close-range experiments were conducted in an indoor laboratory setting. Long-range experiments were performed outdoors towards a building façade. Reference values in both setups were provided with a Leica RTC 360 terrestrial LIDAR system. In the close-range experiments a cross section of the point cloud shows a significant level of noise in the acquired data. At a stand-off distance of 5 m the length measurement tests reveal deviations of up to 11 mm to the reference values. Range measurement was tested up to 130 meters and shows ranging deviations of up to 25 millimetres. The authors recommend further investigation of the issues in radiometric behaviour and material reflectivity. Also, more knowledge about the internal components is needed to understand the causes of the concentric ripple effect observed at close ranges. Another aspect that should be considered is the use of targets and their design as the non-standard scan pattern prevents automated detection with standard commercial software.

scholarly journals Gatekeeper helix activates Golgi SM protein Sly1 and directly mediates close-range vesicle tethering

2020 ◽  
Author(s):  
M. Duan ◽  
R.L. Plemel ◽  
T. Takenaka ◽  
A. Lin ◽  
B.M. Delgado ◽  
...  
Keyword(s):  
Long Range ◽  
Secretory Pathway ◽  
Membrane Binding ◽  
Amphipathic Helix ◽  
Vesicle Tethering ◽  
Early Secretory Pathway ◽  
Hand Off ◽  
Close Range ◽  
Golgi Protein ◽  
Sm Protein

ABSTRACTThe essential Golgi protein Sly1 is a member of the SM (Sec1/mammalian Unc-18) family of SNARE chaperones. Sly1 was originally identified through gain-of-function alleles that bypass requirements for diverse vesicle tethering factors. Employing genetic analyses and chemically defined reconstitutions of ER-Golgi fusion, we discovered that a loop conserved among Sly1 family members is not only autoinhibitory, but also acts as a positive effector. An amphipathic helix within the loop directly binds high-curvature membranes; membrane binding is required for relief of Sly1 autoinhibition and allows Sly1 to directly tether incoming vesicles to the Qa-SNARE on the target organelle. The SLY1-20 allele bypasses requirements for diverse tethering factors but loses this functionality if Sly1 membrane binding is impaired. We propose that long-range tethers, including Golgins and multisubunit tethering complexes, hand off vesicles to Sly1, which then tethers at close range to activate SNARE assembly and fusion in the early secretory pathway.

scholarly journals Mechanistic transmission modeling of COVID-19 on the Diamond Princess cruise ship demonstrates the importance of aerosol transmission

2021 ◽  
Vol 118 (8) ◽  
pp. e2015482118 ◽  
Author(s):  
Parham Azimi ◽  
Zahra Keshavarz ◽  
Jose Guillermo Cedeno Laurent ◽  
Brent Stephens ◽  
Joseph G. Allen
Keyword(s):  
Long Range ◽  
Full Range ◽  
Quantitative Information ◽  
Relative Importance ◽  
Cruise Ship ◽  
Modeling Framework ◽  
Successful Model ◽  
Transmission Modes ◽  
Close Range ◽  
Transmission Factors

Several lines of existing evidence support the possibility of airborne transmission of coronavirus disease 2019 (COVID-19). However, quantitative information on the relative importance of transmission pathways of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) remains limited. To evaluate the relative importance of multiple transmission routes for SARS-CoV-2, we developed a modeling framework and leveraged detailed information available from the Diamond Princess cruise ship outbreak that occurred in early 2020. We modeled 21,600 scenarios to generate a matrix of solutions across a full range of assumptions for eight unknown or uncertain epidemic and mechanistic transmission factors. A total of 132 model iterations met acceptability criteria (R2 > 0.95 for modeled vs. reported cumulative daily cases and R2 > 0 for daily cases). Analyzing only these successful model iterations quantifies the likely contributions of each defined mode of transmission. Mean estimates of the contributions of short-range, long-range, and fomite transmission modes to infected cases across the entire simulation period were 35%, 35%, and 30%, respectively. Mean estimates of the contributions of larger respiratory droplets and smaller respiratory aerosols were 41% and 59%, respectively. Our results demonstrate that aerosol inhalation was likely the dominant contributor to COVID-19 transmission among the passengers, even considering a conservative assumption of high ventilation rates and no air recirculation conditions for the cruise ship. Moreover, close-range and long-range transmission likely contributed similarly to disease progression aboard the ship, with fomite transmission playing a smaller role. The passenger quarantine also affected the importance of each mode, demonstrating the impacts of the interventions.

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