Navigation Model for a Robot as a Human Group Member to Adapt to Changing Conditions of Personal Space

2020 ◽  
Vol 24 (5) ◽  
pp. 621-629
Author(s):  
Yotaro Fuse ◽  
Masataka Tokumaru ◽  
◽  
Keyword(s):  
Dimensional Space ◽  
Three Dimensional ◽  
Personal Space ◽  
Proposed Model ◽  
Personal Robots ◽  
Group Members ◽  
Group Member ◽  
Robot Group ◽  
Three Dimensional Space ◽  
Made In

In the present paper, we propose a robotic model to help determine a robot’s position under the changing conditions of human personal space in a human-robot group. Recently, several attempts have been made to develop personal robots suitable for human communities. Determining a robot’s position is important not only to avoid collisions with humans but also to maintain a socially acceptable distance from them. Interpersonal space maintained by persons in a community depends on the particular context and situations. Therefore, robots need to determine their own positions while considering the positions of other persons and evaluating the changes made in their personal space. To address this problem, we proposed a robot navigation model and examined whether the experiment participants could distinguish the robot’s trajectory from the human’s trajectory in the experimental scenario. We prepared a scenario in which robots in a group needed to keep an appropriate distance in a three-dimensional space. The experiment participants provided their impressions on robot movements while watching the records representing the scenario. The results indicate that (1) a robot using the proposed model is able to follow the other group members and (2) the experiment participants were not sure whether the trajectories of the robots were controlled by humans and by the proposed model. Therefore, we conclude that the proposed model generates suitable trajectories in robot groups.

scholarly journals СПОСІБ РОЗРАХУНКУ ЛОКАЛІЗАЦІЇ ДЖЕРЕЛА ШУМІВ У ТРИВИМІРНОМУ ПРОСТОРІ ДЛЯ ДІАГНОСТИКИ ПНЕВМОНІЇ У ДІТЕЙ МОЛОДШОГО ВІКУ

2015 ◽  
Author(s):  
A. E. Apikova ◽  
D. A. Fedotov ◽  
V. A. Klymenko
Keyword(s):  
Dimensional Space ◽  
Three Dimensional ◽  
Theoretical Justification ◽  
Gps Technology ◽  
Gps Navigation ◽  
Pneumonia Diagnosis ◽  
Three Dimensional Space ◽  
Made In

<p>The theoretical justification for using of the GPS-technology principle for the pneumonia diagnosis was made in the article. The sensor's matrix is located on a patient's chest and it's an inactive system's component unlike satellites used in GPS. The method is i mplemented using t he GPS-navigation formula with some variables replacements. For determining of the coordinates of the sounds source in the three-dimensional space it's necessary to calculate time from sound's source to each sensor of matrix. According to the obtained coordinates the conclusion about the depth and location of the inflammation process (pneumonia) in the patient lungs can be made.</p>

scholarly journals A Piecewise Hysteresis Model for a Damper of HIS System

2016 ◽  
Vol 2016 ◽  
pp. 1-11 ◽  
Author(s):  
Kaidong Tian ◽  
Bangji Zhang ◽  
Nong Zhang ◽  
Xuhui Liu ◽  
Jinchen Ji
Keyword(s):  
High Speed ◽  
Dimensional Space ◽  
Three Dimensional ◽  
Hysteresis Phenomenon ◽  
Hysteresis Model ◽  
Low Speed ◽  
Proposed Model ◽  
Velocity Characteristic ◽  
Force Velocity ◽  
Three Dimensional Space

A damper of the hydraulically interconnected suspension (HIS) system, as a quarter HIS, is prototyped and its damping characteristic is tested to characterize the damping property. The force-velocity characteristic of the prototype is analyzed based on a set of testing results and accordingly a piecewise hysteresis model for the damper is proposed. The proposed equivalent parametric model consists of two parts: hysteresis model in low speed region and saturation model in high speed region which are used to describe the hysteresis phenomenon in low speed and nonhysteresis phenomenon in high speed, respectively. The parameters of the model are identified based on genetic algorithm by setting the constraints of parameters according to their physical significances and the corresponding testing results. The advantages of the model are highlighted by comparing to the nonhysteresis model and the permanent hysteresis model. The numerical simulation results are compared with the testing results to validate the accuracy and effectiveness of the proposed model. Finally, to further verify the proposed model’s wide applicability under different excitation conditions, its results are compared to the testing results in three-dimensional space. The research in this paper is significant for the dynamic analysis of the HIS vehicle.

Dynamic Coding of Vertical Facilitated Vergence by Premotor Saccadic Burst Neurons

2008 ◽  
Vol 100 (4) ◽  
pp. 1967-1982 ◽  
Author(s):  
Marion R. Van Horn ◽  
Kathleen E. Cullen
Keyword(s):  
Dimensional Space ◽  
Three Dimensional ◽  
Precise Control ◽  
Burst Neurons ◽  
Premotor Neurons ◽  
Horizontal Saccade ◽  
The Right ◽  
The Brain ◽  
Three Dimensional Space ◽  
Made In

To redirect our gaze in three-dimensional space we frequently combine saccades and vergence. These eye movements, known as disconjugate saccades, are characterized by eyes rotating by different amounts, with markedly different dynamics, and occur whenever gaze is shifted between near and far objects. How the brain ensures the precise control of binocular positioning remains controversial. It has been proposed that the traditionally assumed “conjugate” saccadic premotor pathway does not encode conjugate commands but rather encodes monocular commands for the right or left eye during saccades. Here, we directly test this proposal by recording from the premotor neurons of the horizontal saccade generator during a dissociation task that required a vergence but no horizontal conjugate saccadic command. Specifically, saccadic burst neurons (SBNs) in the paramedian pontine reticular formation were recorded while rhesus monkeys made vertical saccades made between near and far targets. During this task, we first show that peak vergence velocities were enhanced to saccade-like speeds (e.g., >150 vs. <100°/s during saccade-free movements for comparable changes in vergence angle). We then quantified the discharge dynamics of SBNs during these movements and found that the majority of the neurons preferentially encode the velocity of the ipsilateral eye. Notably, a given neuron typically encoded the movement of the same eye during horizontal saccades that were made in depth. Taken together, our findings demonstrate that the brain stem saccadic burst generator encodes integrated conjugate and vergence commands, thus providing strong evidence for the proposal that the classic saccadic premotor pathway controls gaze in three-dimensional space.

Extension of the Spatial PDI Model to Three Dimensions

1997 ◽  
Vol 84 (1) ◽  
pp. 176-178
Author(s):  
Frank O'Brien
Keyword(s):  
Population Density ◽  
Dimensional Space ◽  
Finite Lattice ◽  
Three Dimensional ◽  
Upper Bounds ◽  
Three Dimensions ◽  
Lower And Upper Bounds ◽  
Density Index ◽  
Three Dimensional Space

The author's population density index ( PDI) model is extended to three-dimensional distributions. A derived formula is presented that allows for the calculation of the lower and upper bounds of density in three-dimensional space for any finite lattice.

A Peptoid with Extended Shape in Water

2019 ◽  
Author(s):  
Jumpei Morimoto ◽  
Yasuhiro Fukuda ◽  
Takumu Watanabe ◽  
Daisuke Kuroda ◽  
Kouhei Tsumoto ◽  
...  
Keyword(s):  
Spectroscopic Analysis ◽  
Dimensional Space ◽  
Three Dimensional ◽  
Biomolecular Recognition ◽  
Biological Application ◽  
New Class ◽  
Proteolytic Resistance ◽  
Pharmacokinetic Properties ◽  
Optically Pure ◽  
Three Dimensional Space

<div> <div> <div> <p>“Peptoids” was proposed, over decades ago, as a term describing analogs of peptides that exhibit better physicochemical and pharmacokinetic properties than peptides. Oligo-(N-substituted glycines) (oligo-NSG) was previously proposed as a peptoid due to its high proteolytic resistance and membrane permeability. However, oligo-NSG is conformationally flexible and is difficult to achieve a defined shape in water. This conformational flexibility is severely limiting biological application of oligo-NSG. Here, we propose oligo-(N-substituted alanines) (oligo-NSA) as a new peptoid that forms a defined shape in water. A synthetic method established in this study enabled the first isolation and conformational study of optically pure oligo-NSA. Computational simulations, crystallographic studies and spectroscopic analysis demonstrated the well-defined extended shape of oligo-NSA realized by backbone steric effects. The new class of peptoid achieves the constrained conformation without any assistance of N-substituents and serves as an ideal scaffold for displaying functional groups in well-defined three-dimensional space, which leads to effective biomolecular recognition. </p> </div> </div> </div>

scholarly journals Quantitative image analysis of microbial communities with BiofilmQ

2021 ◽  
Author(s):  
Raimo Hartmann ◽  
Hannah Jeckel ◽  
Eric Jelli ◽  
Praveen K. Singh ◽  
Sanika Vaidya ◽  
...  
Keyword(s):  
Image Analysis ◽  
Microbial Communities ◽  
Dimensional Space ◽  
Three Dimensional ◽  
Software Tool ◽  
Image Cytometry ◽  
Quantitative Image Analysis ◽  
Space And Time ◽  
Quantitative Image ◽  
Three Dimensional Space

AbstractBiofilms are microbial communities that represent a highly abundant form of microbial life on Earth. Inside biofilms, phenotypic and genotypic variations occur in three-dimensional space and time; microscopy and quantitative image analysis are therefore crucial for elucidating their functions. Here, we present BiofilmQ—a comprehensive image cytometry software tool for the automated and high-throughput quantification, analysis and visualization of numerous biofilm-internal and whole-biofilm properties in three-dimensional space and time.

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