Lingodroids: socially grounding place names in privately grounded cognitive maps

2011 ◽  
Vol 19 (6) ◽  
pp. 409-424 ◽  
Author(s):  
Ruth Schulz ◽  
Gordon Wyeth ◽  
Janet Wiles
Keyword(s):  
Mobile Robots ◽  
Social Interactions ◽  
Cognitive Maps ◽  
Spatial Language ◽  
Single Trial ◽  
Spatial Concepts ◽  
Shared Meanings ◽  
The World ◽  
Spatial Environment ◽  
Novel Method

For mobile robots to communicate meaningfully about their spatial environment, they require personally constructed cognitive maps and social interactions to form languages with shared meanings. Geographic spatial concepts introduce particular problems for grounding—connecting a word to its referent in the world—because such concepts cannot be directly and solely based on sensory perceptions. In this article we investigate the grounding of geographic spatial concepts using mobile robots with cognitive maps, called Lingodroids. Languages were established through structured interactions between pairs of robots called where-are-we conversations. The robots used a novel method, termed the distributed lexicon table, to create flexible concepts. This method enabled words for locations, termed toponyms, to be grounded through experience. Their understanding of the meaning of words was demonstrated using go-to games in which the robots independently navigated to named locations. Studies in real and virtual reality worlds show that the system is effective at learning spatial language: robots learn words easily—in a single trial as children do—and the words and their meaning are sufficiently robust for use in real world tasks.

scholarly journals Improved hybrid A* path planning method for spherical mobile robot based on pendulum

2021 ◽  
Vol 18 (1) ◽  
pp. 172988142199295
Author(s):  
Ziang Zhang ◽  
Yixu Wan ◽  
You Wang ◽  
Xiaoqing Guan ◽  
Wei Ren ◽  
...  
Keyword(s):  
Mobile Robots ◽  
Common Ground ◽  
Kinematic Model ◽  
Point Contact ◽  
Shell Shape ◽  
Spherical Robot ◽  
Trajectory Tracking Control ◽  
Novel Method ◽  
Turning Radius ◽  
Spherical Mobile Robot

This article proposes a modification of hybrid A* method used for navigation of spherical mobile robots with the ability of limited partial lateral movement driven by pendulum. For pendulum-driven spherical robots with nonzero minimal turning radius, our modification helps to find a feasible and achievable path, which can be followed in line with the low time cost. Because of spherical shell shape, the robot is point contact with the ground, showing different kinematic model compared with common ground mobile robots such as differential robot and wheeled car-like robot. Therefore, this article analyzes the kinematic model of spherical robot and proposes a novel method to generate feasible and achievable paths conforming to kinematic constraints, which can be the initial value of future trajectory tracking control and further optimization. A concept of optimal robot’s minimum area for rotation is also proposed to improve search efficiency and ensure the ability of turning to any orientation by moving forward and backward in a finite number of times within limited areas.

TIME-TO-CONTACT INFORMATION ESTIMATION FOR MONOCULAR MOBILE ROBOTS

2008 ◽  
Vol 05 (03) ◽  
pp. 223-233 ◽  
Author(s):  
RONG LIU ◽  
MAX Q. H. MENG
Keyword(s):  
Mobile Robots ◽  
Optical Flow ◽  
Active Contour Model ◽  
Visual Navigation ◽  
Moving Object ◽  
Time To Contact ◽  
Temporal Derivative ◽  
Novel Method ◽  
Derivatives Of ◽  
Flow Experiments

Time-to-contact (TTC) provides vital information for obstacle avoidance and for the visual navigation of a robot. In this paper, we present a novel method to estimate the TTC information of a moving object for monocular mobile robots. In specific, the contour of the moving object is extracted first using an active contour model; then the height of the motion contour and its temporal derivative are evaluated to generate the desired TTC estimates. Compared with conventional techniques employing the first-order derivatives of optical flow, the proposed estimator is less prone to errors of optical flow. Experiments using real-world images are conducted and the results demonstrate that the developed method can successfully achieve TTC with an average relative error (ARVE) of 0.039 with a single calibrated camera.

Facework on Social Media in China

2021 ◽  
Author(s):  
Xiaoli Tian ◽  
Qian Li
Keyword(s):  
Social Media ◽  
Social Interactions ◽  
Future Research ◽  
Sociological Research ◽  
Interpersonal Interactions ◽  
The World ◽  
Online Spaces ◽  
The Face ◽  
Different Parts

With more social interactions shifting to online venues, the different attributes of major social media sites in China influence how interpersonal interactions are carried out. Despite the lack of physical co-presence online, face culture is extended to online spaces. On social media, Chinese users tend to protect their own face, give face to others, and avoid discrediting the face of others, especially when their online and offline networks overlap. This chapter also discusses the different methods used to study facework online and offline and how facework is studied in different parts of the world. It concludes with a brief discussion of how sociological research has contributed to the study of social media in China and directions for future research.

scholarly journals Communication features in online and offline spaces.

2021 ◽  
Vol 13 (3) ◽  
pp. 105-112
Author(s):  
Anrieta A. Karapetyan ◽  
Keyword(s):  
Social Interactions ◽  
Everyday Life ◽  
Nonverbal Communication ◽  
Online Communication ◽  
Social Signals ◽  
Social Lives ◽  
Short Period ◽  
The World ◽  
Pros And Cons ◽  
Cultural Components

No other media has become so popular in such a short period of time as online, which mainly serves for the purpose of communication. Online communications have the potential to fundamentally change the character of our social lives on all levels of social interactions. This article represents an attempt of discussing pros and cons of the online communication compared to the offline ones, and including functional as well as cultural components such as habits, usefulness, as well as specific cases affecting the gradual and immediate shift from the offline to the online communication (like COVID19 pandemic). Online communication spaces provide ample opportunities for selfrepresentation, convenience and compliance, easy connectivity from every place in the world, it is time-consuming and costly. It is widely used in all areas of everyday life. At the same time participants of online communication need nonverbal communication and those all-important social signals, which make communication more efficient. Despite the number of advantages, online communication still cannot completely replace the offline ones.

scholarly journals The Era of Digital Enablement: A Blessing or a Curse?

2020 ◽  
Vol 8 (3) ◽  
pp. 1-5
Author(s):  
Anne-Laure Mention ◽  
Marko Torkkeli ◽  
JJ Pinto Ferreira
Keyword(s):  
Social Interactions ◽  
The World

A few months ago, we claimed that COVID-19 had the potential to be a catalyst for change and innovation (Mention et al., 2020). Undeniably, this has indeed eventuated, but to a scale that was unforeseeable and unpredictable to many. Over the last few months, the world has literally changed. Around the world, people and communities have seen their lives put on a standstill, experiencing and experimenting with variable levels of restrictions preventing social interactions. We have learned what physical – rather than social, at least initially – distancing meant and have uncovered new ways of doing things. And that applied to almost for every single aspect of life. (...)

scholarly journals The Strasbourg Visual Scale: A Novel Method to Assess Visual Hallucinations

2021 ◽  
Vol 12 ◽  
Author(s):  
Anne Giersch ◽  
Thomas Huard ◽  
Sohee Park ◽  
Cherise Rosen
Keyword(s):  
Visual Information ◽  
Subjective Experience ◽  
Physical Property ◽  
Visual Hallucinations ◽  
Visual Scale ◽  
The World ◽  
Novel Method ◽  
Internal Experience ◽  
The Relationship ◽  
Disorders Of The Self

The experience of oneself in the world is based on sensory afferences, enabling us to reach a first-perspective perception of our environment and to differentiate oneself from the world. Visual hallucinations may arise from a difficulty in differentiating one's own mental imagery from externally-induced perceptions. To specify the relationship between hallucinations and the disorders of the self, we need to understand the mechanisms of hallucinations. However, visual hallucinations are often under reported in individuals with psychosis, who sometimes appear to experience difficulties describing them. We developed the “Strasbourg Visual Scale (SVS),” a novel computerized tool that allows us to explore and capture the subjective experience of visual hallucinations by circumventing the difficulties associated with verbal descriptions. This scale reconstructs the hallucinated image of the participants by presenting distinct physical properties of visual information, step-by-step to help them communicate their internal experience. The strategy that underlies the SVS is to present a sequence of images to the participants whose choice at each step provides a feedback toward re-creating the internal image held by them. The SVS displays simple images on a computer screen that provide choices for the participants. Each step focuses on one physical property of an image, and the successive choices made by the participants help them to progressively build an image close to his/her hallucination, similar to the tools commonly used to generate facial composites. The SVS was constructed based on our knowledge of the visual pathways leading to an integrated perception of our environment. We discuss the rationale for the successive steps of the scale, and to which extent it could complement existing scales.

scholarly journals A Design of the Design & Development of Safety Features in Stationary & Mobile Robots in the Industrial Sector

2019 ◽  
Vol 8 (11S) ◽  
pp. 172-178
Keyword(s):  
Mobile Robots ◽  
Industrial Sector ◽  
Design Development ◽  
Survey Article ◽  
The World ◽  
Safety Features

In this survey article, a short audit of the wellbeing highlights in the field of mechanical autonomies, i.e., with respect to the world of robotics is introduced alongside some structural ideas

A novel method for detecting phase modulation of ongoing oscillation in single trial

2011 ◽  
Vol 71 ◽  
pp. e305
Author(s):  
Yasushi Naruse ◽  
Ken Takiyama ◽  
Masato Okada ◽  
Tsutomu Murata
Keyword(s):  
Phase Modulation ◽  
Single Trial ◽  
Novel Method

scholarly journals A MISO-ARX-Based Method for Single-Trial Evoked Potential Extraction

2017 ◽  
Vol 2017 ◽  
pp. 1-10 ◽  
Author(s):  
Nannan Yu ◽  
Lingling Wu ◽  
Dexuan Zou ◽  
Ying Chen ◽  
Hanbing Lu
Keyword(s):  
Evoked Potential ◽  
Moving Average ◽  
Extraction Process ◽  
Autoregressive Moving Average ◽  
Single Trial ◽  
Model Driven ◽  
Single Output ◽  
Multiple Input ◽  
Novel Method ◽  
Electroencephalographic Activity

In this paper, we propose a novel method for solving the single-trial evoked potential (EP) estimation problem. In this method, the single-trial EP is considered as a complex containing many components, which may originate from different functional brain sites; these components can be distinguished according to their respective latencies and amplitudes and are extracted simultaneously by multiple-input single-output autoregressive modeling with exogenous input (MISO-ARX). The extraction process is performed in three stages: first, we use a reference EP as a template and decompose it into a set of components, which serve as subtemplates for the remaining steps. Then, a dictionary is constructed with these subtemplates, and EPs are preliminarily extracted by sparse coding in order to roughly estimate the latency of each component. Finally, the single-trial measurement is parametrically modeled by MISO-ARX while characterizing spontaneous electroencephalographic activity as an autoregression model driven by white noise and with each component of the EP modeled by autoregressive-moving-average filtering of the subtemplates. Once optimized, all components of the EP can be extracted. Compared with ARX, our method has greater tracking capabilities of specific components of the EP complex as each component is modeled individually in MISO-ARX. We provide exhaustive experimental results to show the effectiveness and feasibility of our method.

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