scholarly journals The Homing Frog: High Homing Performance in a Territorial Dendrobatid FrogAllobates femoralis(Dendrobatidae)

Ethology ◽  
2013 ◽  
Vol 119 (9) ◽  
pp. 762-768 ◽  
Author(s):  
Andrius Pašukonis ◽  
Max Ringler ◽  
Hanja B. Brandl ◽  
Rosanna Mangione ◽  
Eva Ringler ◽  
...  
Keyword(s):  
Homing Performance

Suboptimal mid-course guidance algorithm for accelerating missiles

2016 ◽  
Vol 231 (11) ◽  
pp. 2032-2047 ◽  
Author(s):  
Min-Guk Seo ◽  
Min-Jea Tahk
Keyword(s):  
Performance Enhancement ◽  
Feedback Form ◽  
Velocity Change ◽  
Guidance Law ◽  
Burn Out ◽  
Homing Performance ◽  
Guidance Algorithm ◽  
Midcourse Guidance ◽  
Missile System ◽  
Loop Form

This paper deals with the closed-loop form of mid-course guidance law design for accelerating missile system, whose acceleration is approximately constant. A midcourse guidance algorithm of feedback form is proposed to satisfy the engagement geometry conditions at the burn-out time for terminal homing performance enhancement. The effect of velocity change due to missile acceleration is explicitly considered in the derivation of the guidance law. The terminal constraint update algorithm is proposed under the assumption that the target trajectory is predicted precisely. Simulation results are provided to show the performance and characteristics of the proposed algorithm.

scholarly journals Homing behaviour of pigeons subjected to unilateral zinc sulphate treatment of their olfactory mucosa

1996 ◽  
Vol 199 (11) ◽  
pp. 2531-2535 ◽  
Author(s):  
S Benvenuti ◽  
A Gagliardo
Keyword(s):  
Brain Damage ◽  
Zinc Sulphate ◽  
Experimental Treatment ◽  
Olfactory Mucosa ◽  
Initial Orientation ◽  
Sulphate Solution ◽  
Control Groups ◽  
Homing Behaviour ◽  
Homing Performance ◽  
Zinc Sulphate Solution

Pigeons were made anosmic by unilateral treatment of their olfactory mucosa with a zinc sulphate solution and by plugging the contralateral nostril. In a series of releases at unfamiliar sites, 55­79 km from the home loft, the experimental birds' homing behaviour was compared with that of two control groups: unmanipulated control birds, and birds subjected to unilateral zinc sulphate treatment and equipped with an ipsilateral nasal plug. The experimental pigeons exhibited homing behaviour ­ in terms of both homeward initial orientation and homing performance ­ significantly poorer than that of both unmanipulated and treated control pigeons. In addition, the homing behaviour of the treated controls turned out to be only slightly, and not significantly, poorer than that of the unmanipulated birds. The results show that the impaired homing capabilities of the zinc-sulphate-treated birds are due to the lack of navigational information and not to non-specific brain damage caused by the experimental treatment.

scholarly journals Bilateral postsubiculum lesions impair visual and nonvisual homing performance in rats.

2019 ◽  
Vol 133 (5) ◽  
pp. 496-507 ◽  
Author(s):  
Ryan M. Yoder ◽  
Stephane Valerio ◽  
Adam C. G. Crego ◽  
Benjamin J. Clark ◽  
Jeffrey S. Taube
Keyword(s):  
Homing Performance

Analyzing the effect of landmark vectors in homing navigation

2012 ◽  
Vol 20 (5) ◽  
pp. 337-359 ◽  
Author(s):  
Seung-Eun Yu ◽  
Changmin Lee ◽  
DaeEun Kim
Keyword(s):  
Mobile Robots ◽  
Significant Influence ◽  
Experimental Results ◽  
Retinal Images ◽  
Navigation Algorithms ◽  
Homing Performance ◽  
Potential Use

The development of an autonomous navigating robot is a challenging task. Motivated by the performance of insects successfully returning to the nest, researchers have studied bio-inspired navigation algorithms for their potential use in mobile robots. In this paper, we analyze landmark-based approaches, especially Distance Estimated Landmark Vector (DELV), Average Correctional Vector and Average Landmark Vector methods, that use landmark vectors for visible environmental landmarks. We evaluated the homing performance of various landmark vector methods with surrounding landmarks under occlusion and found that the occluded or missing landmarks have a significant influence on the performance. We also developed a landmark vector algorithm with a visual compass that uses only retinal images without a reference compass. From our experimental results, we conclude that the DELV shows robust homing navigation performance with missing or occluded landmarks among landmark vector methods.

The effects of age and length on homing performance in the intertidal cottid, Oligocottus maculosus Girard

1981 ◽  
Vol 59 (4) ◽  
pp. 598-604 ◽  
Author(s):  
G. J. S. Craik
Keyword(s):  
Home Range ◽  
Age Groups ◽  
Considerable Variability ◽  
Size Classes ◽  
Homing Behaviour ◽  
Total Length ◽  
Homing Performance ◽  
Oligocottus Maculosus

The intertidal cottid Oligocottus maculosus Girard has been previously reported to demonstrate homing behaviour, that is, to return to its home range (group of tidepools covered in normal travel) and (or) its home pool (pool of first capture) when transplanted to a pool some distance away. Investigation of significant differences in homing behaviour between the three major age groups of O. maculosus showed an improvement in the percentage successfully homing with length, peaking between 5 and 7 cm (total length) (age 2), with considerable variability in smaller size classes and decreasing homing success in larger fish.Juvenile fish (about 2.3 to 2.7 cm) move extensively between tidepools and begin demonstrating home range fidelity and homing behaviour at about 3 cm. It is suggested that during this period of extensive movement, the area is in some way "learned" and "memorized."

scholarly journals Two new PCR-RFLPs in the domestic pigeon (<i>Columba livia</i> var. <i>domestica</i>) lactate dehydrogenase A (<i>LDH-A</i>) gene (Brief report)

2007 ◽  
Vol 50 (1) ◽  
pp. 112-113
Author(s):  
A. Dybus
Keyword(s):  
Lactate Dehydrogenase ◽  
Muscle Tissue ◽  
Spatial Orientation ◽  
Anaerobic Metabolism ◽  
Columba Livia ◽  
Domestic Pigeon ◽  
Homing Performance ◽  
Aerobic And Anaerobic ◽  
Ldha Gene ◽  
Selection Of

Abstract. Traditional selection of racing pigeons has been focusing on spatial orientation, velocity, and endurance of flight. LDHA gene is involved in aerobic and anaerobic metabolism of the muscle tissue (VAN HALL et al., 1999). Mutations in the LDHA gene can potentially diversify the homing performance of racing pigeons. Previously, two polymorphic sites of LDHA gene have been identified (DYBUS and KMIEĆ, 2002, DYBUS et al., 2006).

scholarly journals Three Landmark Optimization Strategies for Mobile Robot Visual Homing

Sensors ◽  
2018 ◽  
Vol 18 (10) ◽  
pp. 3180 ◽  
Author(s):  
Xun Ji ◽  
Qidan Zhu ◽  
Junda Ma ◽  
Peng Lu ◽  
Tianhao Yan
Keyword(s):  
Mobile Robot ◽  
Target Location ◽  
Mobile Robot Navigation ◽  
Scale Invariant ◽  
Visual Homing ◽  
Vision Sensors ◽  
Homing Performance ◽  
Sift Features ◽  
Scale Invariant Feature ◽  
Input Form

Visual homing is an attractive autonomous mobile robot navigation technique, which only uses vision sensors to guide the robot to the specified target location. Landmark is the only input form of the visual homing approaches, which is usually represented by scale-invariant features. However, the landmark distribution has a great impact on the homing performance of the robot, as irregularly distributed landmarks will significantly reduce the navigation precision. In this paper, we propose three strategies to solve this problem. We use scale-invariant feature transform (SIFT) features as natural landmarks, and the proposed strategies can optimize the landmark distribution without over-eliminating landmarks or increasing calculation amount. Experiments on both panoramic image databases and a real mobile robot have verified the effectiveness and feasibility of the proposed strategies.

The role of orientation flights on homing performance in honeybees

1999 ◽  
Vol 202 (12) ◽  
pp. 1655-1666 ◽  
Author(s):  
E.A. Capaldi ◽  
F.C. Dyer
Keyword(s):  
Large Scale ◽  
Spatial Information ◽  
Model Organism ◽  
Insect Navigation ◽  
Homing Performance ◽  
Route Memory ◽  
Orientation Flight ◽  
Single Orientation ◽  
Orientation Flights

Honeybees have long served as a model organism for investigating insect navigation. Bees, like many other nesting animals, primarily use learned visual features of the environment to guide their movement between the nest and foraging sites. Although much is known about the spatial information encoded in memory by experienced bees, the development of large-scale spatial memory in naive bees is not clearly understood. Past studies suggest that learning occurs during orientation flights taken before the start of foraging. We investigated what honeybees learn during their initial experience in a new landscape by examining the homing of bees displaced after a single orientation flight lasting only 5–10 min. Homing ability was assessed using vanishing bearings and homing speed. At release sites with a view of the landmarks immediately surrounding the hive, ‘first-flight’ bees, tested after their very first orientation flight, had faster homing rates than ‘reorienting foragers’, which had previous experience in a different site prior to their orientation flight in the test landscape. First-flight bees also had faster homing rates from these sites than did ‘resident’ bees with full experience of the terrain. At distant sites, resident bees returned to the hive more rapidly than reorienting or first-flight bees; however, in some cases, the reorienting bees were as successful as the resident bees. Vanishing bearings indicated that all three types of bees were oriented homewards when in the vicinity of landmarks near the hive. When bees were released out of sight of these landmarks, hence forcing them to rely on a route memory, the ‘first-flight’ bees were confused, the ‘reorienting’ bees chose the homeward direction except at the most distant site and the ‘resident’ bees were consistently oriented homewards.

Sign in / Sign up

Export Citation Format

Share Document