scholarly journals Characterizing transport through a crowded environment with different obstacle sizes

2014 ◽  
Vol 140 (5) ◽  
pp. 054108 ◽  
Author(s):  
Adam J. Ellery ◽  
Matthew J. Simpson ◽  
Scott W. McCue ◽  
Ruth E. Baker
Keyword(s):  
Crowded Environment

scholarly journals Swarm Robotic Interactions in an Open and Cluttered Environment: A Survey

Designs ◽  
2021 ◽  
Vol 5 (2) ◽  
pp. 37
Author(s):  
Maxime Vaidis ◽  
Martin J.-D. Otis
Keyword(s):  
Literature Review ◽  
Research Trends ◽  
Cluttered Environment ◽  
Advantages And Disadvantages ◽  
Population Migrations ◽  
New Research ◽  
Interaction Strategy ◽  
Crowded Environment

Recent population migrations have led to numerous accidents and deaths. Little research has been done to help migrants in their journey. For this reason, a literature review of the latest research conducted in previous years is required to identify new research trends in human-swarm interaction. This article presents a review of techniques that can be used in a robots swarm to find, locate, protect and help migrants in hazardous environment such as militarized zone. The paper presents a swarm interaction taxonomy including a detailed study on the control of swarm with and without interaction. As the interaction mainly occurs in cluttered or crowded environment (with obstacles) the paper discussed the algorithms related to navigation that can be included with an interaction strategy. It focused on comparing algorithms and their advantages and disadvantages.

scholarly journals Characterization of a Novel FRET Probe in a Crowded Environment using Time-Resolved Anisotropy

2017 ◽  
Vol 112 (3) ◽  
pp. 346a
Author(s):  
Hannah Leopold ◽  
Megan Currie ◽  
Jacob Schwarz ◽  
Arnold J. Boersma ◽  
Erin D. Sheets ◽  
...  
Keyword(s):  
Time Resolved ◽  
Crowded Environment

scholarly journals Molecular dynamics simulations and CD spectroscopy reveal hydration-induced unfolding of the intrinsically disordered LEA proteins COR15A and COR15B from Arabidopsis thaliana

2016 ◽  
Vol 18 (37) ◽  
pp. 25806-25816 ◽  
Author(s):  
Carlos Navarro-Retamal ◽  
Anne Bremer ◽  
Jans Alzate-Morales ◽  
Julio Caballero ◽  
Dirk K. Hincha ◽  
...  
Keyword(s):  
Experimental Data ◽  
Molecular Dynamics ◽  
Arabidopsis Thaliana ◽  
Molecular Dynamics Simulations ◽  
Md Simulations ◽  
Cd Spectroscopy ◽  
Lea Proteins ◽  
Intrinsically Disordered ◽  
Dynamics Simulations ◽  
Crowded Environment

Unfolding of intrinsically unstructured full-length LEA proteins in a differentially crowded environment can be modeled by 30 ns MD simulations in accordance with experimental data.

scholarly journals Unexpected Swelling of Stiff DNA in a Polydisperse Crowded Environment

2015 ◽  
Vol 137 (34) ◽  
pp. 10970-10978 ◽  
Author(s):  
Hongsuk Kang ◽  
Ngo Minh Toan ◽  
Changbong Hyeon ◽  
D. Thirumalai
Keyword(s):  
Crowded Environment

scholarly journals The Fear to Move in a Crowded Environment. Poor Spatial Memory Related to Agoraphobic Disorder

2021 ◽  
Vol 11 (6) ◽  
pp. 796
Author(s):  
Micaela Maria Zucchelli ◽  
Laura Piccardi ◽  
Raffaella Nori
Keyword(s):  
Working Memory ◽  
Spatial Information ◽  
Theoretical Background ◽  
Exploratory Activity ◽  
Visuospatial Working Memory ◽  
Spatial Tasks ◽  
And Performance ◽  
The Relationship ◽  
Crowded Environment ◽  
Active Processing

Individuals with agoraphobia exhibit impaired exploratory activity when navigating unfamiliar environments. However, no studies have investigated the contribution of visuospatial working memory (VSWM) in these individuals’ ability to acquire and process spatial information while considering the use of egocentric and allocentric coordinates or environments with or without people. A total of 106 individuals (53 with agoraphobia and 53 controls) navigated in a virtual square to acquire spatial information that included the recognition of landmarks and the relationship between landmarks and themselves (egocentric coordinates) and independent of themselves (allocentric coordinates). Half of the participants in both groups navigated in a square without people, and half navigated in a crowded square. They completed a VSWM test in addition to tasks measuring landmark recognition and egocentric and allocentric judgements concerning the explored square. The results showed that individuals with agoraphobia had reduced working memory only when active processing of spatial elements was required, suggesting that they exhibit spatial difficulties particularly in complex spatial tasks requiring them to process information simultaneously. Specifically, VSWM deficits mediated the relationship between agoraphobia and performance in the allocentric judgements. The results are discussed considering the theoretical background of agoraphobia in order to provide useful elements for the early diagnosis of this disorder.

scholarly journals A death pheromone, oleic acid, triggers hygienic behavior in honey bees (Apis mellifera L.)

2017 ◽  
Author(s):  
Alison McAfee ◽  
Abigail Chapman ◽  
Immacolata Iovinella ◽  
Ylonna Gallagher-Kurtzke ◽  
Troy F. Collins ◽  
...  
Keyword(s):  
Oleic Acid ◽  
Honey Bees ◽  
Complex Behavior ◽  
Hygienic Behavior ◽  
Larval Food ◽  
Odorant Binding Proteins ◽  
Eusocial Insects ◽  
Low Levels ◽  
Odorant Binding ◽  
Crowded Environment

Eusocial insects live in teeming societies with thousands of their kin. In this crowded environment, workers combat disease by removing or burying their dead or diseased nestmates. For honey bees, we found that hygienic brood-removal behavior is triggered by two odorants – β-ocimene and oleic acid – which are released from brood upon freeze-killing. β-ocimene is a co-opted pheromone that normally signals larval food-begging, whereas oleic acid is a conserved necromone across arthropod taxa. Interestingly, the odorant blend can induce hygienic behavior more consistently than either odorant alone. We suggest that the volatile β-ocimene flags hygienic workers’ attention, while oleic acid is the death cue, triggering removal. Bees with high hygienicity detect and remove brood with these odorants faster than bees with low hygienicity, and both molecules are strong ligands for hygienic behavior-associated odorant binding proteins (OBP16 and OBP18). Odorants that induce low levels of hygienic behavior, however, are weak ligands for these OBPs. We are therefore beginning to paint a picture of the molecular mechanism behind this complex behavior, using odorants associated with freeze-killed brood as a model.

scholarly journals A Minimum-Spanning-Tree-Inspired Algorithm for Channel Assignment in 802.11 Networks

2016 ◽  
Vol 62 (4) ◽  
pp. 379-388 ◽  
Author(s):  
Iwona Dolińska ◽  
Mariusz Jakubowski ◽  
Antoni Masiukiewicz ◽  
Grzegorz Rządkowski ◽  
Kamil Piórczyński
Keyword(s):  
Greedy Algorithm ◽  
Channel Assignment ◽  
Spanning Tree ◽  
Spanning Trees ◽  
Minimum Spanning Tree ◽  
Minimum Spanning Trees ◽  
Undirected Graphs ◽  
Interference Level ◽  
802.11 Networks ◽  
Crowded Environment

Abstract Channel assignment in 2.4 GHz band of 802.11 standard is still important issue as a lot of 2.4 GHz devices are in use. This band offers only three non-overlapping channels, so in crowded environment users can suffer from high interference level. In this paper, a greedy algorithm inspired by the Prim’s algorithm for finding minimum spanning trees (MSTs) in undirected graphs is considered for channel assignment in this type of networks. The proposed solution tested for example network distributions achieves results close to the exhaustive approach and is, in many cases, several orders of magnitude faster.

scholarly journals Where Do You Sit in Class? A Study of Spatial Positioning During Two Courses of Different Duration

2017 ◽  
Vol 1 (1) ◽  
pp. 1-7 ◽  
Author(s):  
Gilles Clément ◽  
Angie Bukley
Keyword(s):  
Academic Programs ◽  
Lecture Hall ◽  
Objective Data ◽  
Class A ◽  
Seating Location ◽  
Spatial Positioning ◽  
Confined Environment ◽  
Hourly Basis ◽  
Crowded Environment ◽  
Selection Of

The objective of this study was to study the selection of seat location by individuals in a group in a confined environment and to identify the factors leading people to prefer one location to another. We analyzed the seating location of students in a lecture hall over the course of two academic programs of different durations (19 days and 44 days). The goal was to determine the rate at which participants would settle into a specific seat location. Unobtrusive photography was used to collect objective data on an hourly basis. Results showed that in both courses participants began to settle into a specific location from the second day of class. Twenty percent of the participants had settled after 4-7 days or 15.5 hours in class. Settling continued for the duration of the shorter course. However, in the longer course settling stopped after 28.5 days on average. The plateau in the number of settlers depended on the number of days, not on the time actually spent in class. At the end of the longer course 52.5% of the participants had settled, compared to 38.9% in the shorter course. Settling into the same seat location can be interpreted as a strategy to establish a personal territory. These results indicate that about half of a cohort expresses the need for establishing a personal territory when in a confined and crowded environment, and this process takes about one month.

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