Analyzing flash mobs in cybernetic space and the imminent security threats a collective action based theoretical perspective on emerging sociotechnical behaviors

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Artículo de revista

Idioma

Since the occurrence of the first ‘flash mob’ organized by Bill Wasik (senior editor of the Harper’s Magazine) in Manhattan in 2003, flash mob phenomenon has become widespread. Recent journalistic accounts have reported that this form of public engagement can pose significant threats to civil, political, social, and economic stability of a region. Gaps in the scientific understanding of such phenomenon and the imminent security risks posed by such acts call for a need to systematically study them. In this ongoing research, we shed light on the social dynamics of the flash mob phenomenon and build a conceptual model examining the necessary factors for the formation of flash mob and predicting its success or failure. Grounded in the sociological theories of collective action and collective identity formation, we evaluate the motivations of a flash mob practitioner and logically analyze the choices he/she would face with regards to acting or withdrawing from the flash mob. More broadly, this work is an attempt to bridge social and computational sciences that would help clarify and explain manifestations of emerging sociotechnical behaviors such as parkour, campaigns, and social movements that are widely observed.

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Centro de práctica y entrenamiento de deportes extremos: escalada, parkour y patinaje para jóvenes

Autor

Trabajo Fin de Grado/Máster o similar

Idioma

Proyecto de espacio público y equipamiento deportivo para responder a la práctica de deportes extremos en la ciudad de Bogotá y beneficiar a la ciudadanía en general. El proyecto contempla los elementos de la estructura ecológica principal de los cerros orientales, elementos de la movilidad y del espacio público como elementos ordenadores de la ciudad y considera de las nuevas dinámicas que giran en torno al deporte (los deportes extremos como una nueva forma de interactuar con el espacio), involucrando las poblaciones de interés como son las del ámbito educativo y turístico, teniendo en cuenta las poblaciones vulnerables que se encuentran ubicadas en los alrededores de la zona de intervención.

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Design and open-loop control of the parkourbot, a dynamic climbing robot

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Artículo de revista

Idioma

The ParkourBot climbs in a planar reduced-gravity vertical chute by leaping back and forth between the chute's two parallel walls. The ParkourBot is comprised of a body with two springy legs and its controls consist of leg angles at touchdown and the energy stored in them. During flight, the robot stores elastic potential energy in its springy legs and then converts this potential energy in to kinetic energy at touchdown, when it “kicks off” a wall. This paper describes the ParkourBot's mechanical design, modeling, and open-loop climbing experiments. The mechanical design makes use of the BowLeg, previously used for hopping on a flat ground. We introduce two models of the BowLeg ParkourBot: one is based on a nonzero stance duration using the spring-loaded inverted pendulum model, and the other is a simplified model (the simplest parkour model, or SPM) obtained as the leg stiffness approaches infinity and the stance time approaches zero. The SPM approximation provides the advantage of closed-form calculations. Finally, predictions of the models are validated by experiments in open-loop climbing in a reduced-gravity planar environment provided by an air table.

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Feedback control experiments with the parkourbot

Autor

artículo de revista

Idioma

The ParkourBot is a planar dynamic climbing biped robot and is capable of dynamically locomoting between two "vertical" walls in a reduced-gravity planar environment of an inclined air table. During flight, springy legs are compressed to store elastic energy. At impact, this potential energy is quickly converted to kinetic energy. In this paper, we demonstrate that simple feedback control strategies with a high-speed vision system can be used to control the Parkour-Bot to bounce in place, climb up and climb down

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Enabling Smart Workflows over Heterogeneous ID-SensingTechnologies

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Artículo de revista

Idioma

Sensing technologies in mobile devices play a key role in reducing the gapbetween the physical and the digital world. The use of automatic identification capabilitiescan improve user participation in business processes where physical elements are involved(Smart Workflows). However, identifying all objects in the user surroundings does notautomatically translate into meaningful services to the user. This work introduces Parkour,an architecture that allows the development of services that match the goals of each ofthe participants in a smart workflow. Parkour is based on a pluggable architecture thatcan be extended to provide support for new tasks and technologies. In order to facilitatethe development of these plug-ins, tools that automate the development process are alsoprovided. Several Parkour-based systems have been developed in order to validate theapplicability of the proposal.

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Terrain Runner: Control, Parameterization, Composition, and Planning for Highly Dynamic Motions

Autor

Publicación en congreso

Idioma

In this paper we learn the skills required by real-time physics-based avatars to perform parkour-style fast terrain crossing using a mix of running, jumping, speed-vaulting, and drop-rolling. We begin with a single motion capture example of each skill and then learn reduced-order linear feedback control laws that provide robust execution of the motions during forward dynamic simulation. We then parameterize each skill with respect to the environment, such as the height of obstacles, or with respect to the task parameters, such as running speed and direction. We employ a continuation process to achieve the required parameterization of the motions and their affine feedback laws. The continuation method uses a predictor-corrector method based on radial basis functions. Lastly, we build control laws specific to the sequential composition of different skills, so that the simulated character can robustly transition to obstacle clearing maneuvers from running whenever obstacles are encountered. The learned transition skills work in tandem with a simple online step-based planning algorithm, and together they robustly guide the character to achieve a state that is well-suited for the chosen obstacle-clearing motion.

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Fuzzy evaluation to parkour social value research based on AHP improved model

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Artículo de revista

Idioma

Parkour requires better physical quality and psychological quality, its features is continuously overcoming psychological limit and physical limit, self-break, getting passed obstacles. In recent years, it has been rapidly developed in China, and generates larger influences on each aspect of society, especially in the youth group, evaluates its social value is emphasis and direction of present scholars researches. This paper makes analysis and research on parkour social value by documents literature as well as establishing mathematical model. Setting and classifying value system to do comprehensive evaluation, it gets each sub factor weight by analytic hierarchy process, and then it gets parkour social value evaluation by fuzzy mathematical evaluation. Research shows the sport development in China has benefits in whole society culture, economy, body building, and ecology and so on; final evaluated social value result is higher

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Ranking Domain-Specific Highlights by Analyzing Edited Videos

Autor

Publicación en congreso

Idioma

We present a fully automatic system for ranking domain-specific highlights in unconstrained personal videos by analyzing online edited videos. A novel latent linear ranking model is proposed to handle noisy training data harvested online. Specifically, given a search query (domain) such as “surfing”, our system mines the Youtube database to find pairs of raw and corresponding edited videos. Leveraging the assumption that edited video is more likely to contain highlights than the trimmed parts of the raw video, we obtain pair-wise ranking constraints to train our model. The learning task is challenging due to the amount of noise and variation in the mined data. Hence, a latent loss function is incorporated to robustly deal with the noise. We efficiently learn the latent model on a large number of videos (about 700 minutes in all) using a novel EM-like self-paced model selection procedure. Our latent ranking model outperforms its classification counterpart, a motion analysis baseline [15], and a fully-supervised ranking system that requires labels from Amazon Mechanical Turk. Finally, we show that impressive highlights can be retrieved without additional human supervision for domains like skating, surfing, skiing, gymnastics, parkour, and dog activity in unconstrained personal videos.

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La influencia del mercado sobre la práctica de "parkour"

Autor

Publicación en congreso

Idioma

El “parkour” es una disciplina originada en Francia que busca la libertad en el desplazamiento entre un punto y otro de forma fluida. Lo que inició como una práctica con fundamentos basados en la libertad ha sido devorada por el mercado, construyendo estereotipos de lo que debe hacer y no un “traceur” (practicante de parkour). La producción masiva ha esquematizado a quienes se inician en esto, consignando modelos atractivos estéticamente y que consumen determinados productos. Se han analizado los productos audiovisuales subidos a portales como YouTube para establecer su relación y similitudes con el modelo cinematográfico imperante. Se contrasta la visualidad de las primeras producciones con las nuevas y los productos que consumen los practicantes en los eventos masivos que organizan. El objetivo es la promoción de la actividad de una forma más auténtica, educar al público para que conozca en qué consiste la filosofía de fondo e instar a una búsqueda más creativa y vanguardista de formas de practicar.

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The simplest parkour model: Experimental validation and stability analysis

Autor

Artículo de revista

Idioma

We describe and experimentally validate the Simplest Parkour Model (SPM) for the ParkourBot, a planar dynamic climbing robot equipped with two springy BowLegs. By controlling the leg angles and injected energy at impact, the ParkourBot is capable of climbing up and down in a rigid chute on an inclined air table. The SPM consists of a point mass and two massless legs. The legs are assumed to be infinitely stiff, resulting in an instantaneous stance phase and a closed-form solution of the hybrid dynamics. In this paper, we show that the SPM is a good predictor of the actual experimental behavior. Using the SPM we compute the fixed points, stability and basins of attraction of period-1 limit cycles.

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A Framework for Extreme Locomotion Planning

Autor

Publicación en congreso

Idioma

A person practicing parkour is an incredible display of intelligent planning; he must reason carefully about his velocity and contact placement far into the future in order to locomote quickly through an environment. We seek to develop planners that will enable robotic systems to replicate this performance. An ideal planner can learn from examples and formulate feasible full-body plans to traverse a new environment. The proposed approach uses momentum equivalence to reduce the full-body system into a simplified one. Lowdimensional trajectory primitives are then composed by a sampling planner called Sampled Composition A* to produce candidate solutions that are adjusted by a trajectory optimizer and mapped to a full-body robot. Using primitives collected from a variety of sources, this technique is able to produce solutions to an assortment of simulated locomotion problems

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Ecoextreme: Red eco-deportiva de los cerros orientales para el desarrollo recreativo, turístico y educativo de Bogotá

Autor

Trabajo Fin de Grado/Máster o similar

Idioma

Proyecto de espacio público y equipamiento deportivo para responder a la práctica de deportes extremos en la ciudad de Bogotá y beneficiar a la ciudadanía en general. El proyecto contempla los elementos de la estructura ecológica principal de los cerros orientales, elementos de la movilidad y del espacio público como elementos ordenadores de la ciudad y considera de las nuevas dinámicas que giran en torno al deporte (los deportes extremos como una nueva forma de interactuar con el espacio), involucrando las poblaciones de interés como son las del ámbito educativo y turístico, teniendo en cuenta las poblaciones vulnerables que se encuentran ubicadas en los alrededores de la zona de intervención.

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