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The paper presents a work executed in the virtual prototyping area. It is described as a procedure for the implementation of a CNC (Computerized Numeric Command) lathe prototype using software for virtual environment development. This procedures focus mainly on the interlocking system (functionality) and geometric model (physical design) of the lathe. Consequently, this work aims at checking the potential and limitations of this graphic interface tool, considering the complexity of the data required for product prototyping in manufacturing or assembly. Red de Universidades con Carreras en Informática (RedUNCI) Eje: Programación de imágenes

Virtual Reality has become, once again, a popular and interesting topic, both as a research and commercial field. This trend has its origin in the use of mobile devices as computational core and displays for Virtual Reality. Android is one of the most used platform in this context and Unity3d is a suitable graphic engine for such platform. In order to improve the immersive experience, some electronic devices, Arduino especially, are used to gather information, such as the movement of the user's arms or legs. Although these three elements are often used in Virtual Reality, few studies use all of them in combination. Those who do, do not develop a reusable framework for their implementations. In this work we present AnArU, a framework for physical human interaction in Virtual Reality. The goal of AnArU is to allow an easy, efficient and extensible communication between electronic devices and the Virtual Reality system. XIII Workshop Computación Gráfica, Imágenes y Visualización (WCGIV) Red de Universidades con Carreras en Informática (RedUNCI)

Despite the known health benefits of regular participation in physical activity people still refuse this practise. Nowadays, Virtual Reality (VR) is a very powerful and compelling computer tool by which humans can interface and interact with computer-generated environments. In this paper, we propose a virtual training system which can be customized for the physical activity level of the user. System provides real time visual action guide and a performance’s feedback of users through a Natural User Interface (NUI). We conduct a brief pilot study to evaluate our virtual trainers in which participants’ performance doing physical activities is evaluated via our NUI. Initial results indicate that virtual training through a NUI is motivating and entertaining for any kind of user, in particular for individuals with low level of physical activity. XV Workshop de Computación Gráfica, Imágenes y Visualización (WCGIV). Red de Universidades con Carreras en Informática (RedUNCI)

In this work, we present a computational toolkit to perform neuroscience experiments with people inside virtual immersive environment like a CAVE (Computer Assisted Virtual Environment). Several experiments can be designed, performed and measured for customized virtual scenes. Each participant is exposed to experiences in which they search and collect objects within a three-dimensional space, where they have to use spatial strategies to solve the task. The purpose is to study cognitive functions such as perception, attention, cognition and short term memory. These tools can reduce the time of experiments formulations and helps to discover mechanisms of attention and spatial and episodic memory. All information about each participant trajectory, the virtual scene configuration, the location of objects in these scenes, and answers to particular questions regarding the experience is collected and presented in. XV Workshop de Computación Gráfica, Imágenes y Visualización (WCGIV). Red de Universidades con Carreras en Informática (RedUNCI)

The steady growth of technology has allowed to extend all forms of human-computer communication. Since the emergence of more sophisticated interaction devices, Human Computer Interaction (HCI) science has added the issue of Non-Verbal Communication (NVC). Nowadays, there are a lot of applications such as interactive entertainments and virtual reality requiring more natural and intuitive interfaces. Human gestures constitute a great space of actions expressed by the body, face, and/or hands. Hand Gesture is frequently used in people’s daily life, thus it is an alternative form to communicate with computers in an easy way. This paper introduces a real-time hand gesture recognition and tracking system to identify different and dinamic hand postures. In order to improve the user experience, a set of different system functions into a virtual world had been implemented so interaction can be performed by the user through a data glove device. XIV Workshop Computación Gráfica, Imágenes y Visualización (WCGIV). Red de Universidades con Carreras en Informática (RedUNCI)

Since the start of the COVID-19 pandemic, the severity and prevalence of symptoms of psychological distress, fatigue, brain fog, and other conditions have increased considerably, including among people who have not been infected with SARS-CoV-2. Many studies summarize the effect of the pandemic on the availability of mental health services and how this has changed during the pandemic. Concerned that potential increases in mental health conditions, had already prompted 90% of countries surveyed to include mental health and psychosocial support in their post COVID-19 response plans, but major gaps and concerns remain. In this paper we developed a de-stress proposal through a digital zen garden by using an augmented reality sandbox. The system provides patients with flexible interaction and easy control of the scenario, while making real time data recording. An objective evaluation method is proposed to review the effectiveness of the therapy. According to the evaluation results of patients’ training, the system is a low cost entertainment tool that augments patients’ motivation, and helps to increase the effectiveness of therapy. XX Workshop Computación Gráfica, Imágenes y Visualización (WCGIV) Red de Universidades con Carreras en Informática

We propose a new non-parametric and linear-complexity algorithm to visualize complex networks, which were previously decomposed in subsets according to some criteria. We show two representations: the first including all edges and vertices and the second, summarized, highlighting subsets and their relations. In this paper we use a community decomposition algorithm to generate the subsets; then we rank them by the number of inter-community connections. We also highlight the central core of each community, that is, the subset with the highest connectivity level, which is the kmax-core of the k-core decomposition. Sociedad Argentina de Informática e Investigación Operativa

The importance of correctly determining the requirements of a system at the very beginning of the development process it is a well known fact. Experience shows that the incorrect definition of the requirements leads to the development of deficient systems, increases the cost of its development or even cause projects to fail. Therefore it is crucial for the clients to verify that the planned system satisfies their needs. This means that the system must be described in a form that clients can clearly understand it. In this context, visualization techniques appear as a useful tool to help the users in the process of requirements understanding and validation. This work proposes the use of 3D visualization techniques to validate the requirements of a system with the user. The use of these techniques can reduce the communication gap between the clients and the developers resulting in a much more effective process of requirements validation. The approach tries to take advantage of the benefits of the 3D visualization, complementing this with the advantages of formal specifications. A tool, called ReqViz3D, that materializes the proposal was developed. This tool allows to specify the requirements in the formal language Z, define a graphical representation of them, and create a 3D animated visualization of theirs execution through which the users can validate them. Red de Universidades con Carreras en Informática (RedUNCI) Eje: Visualización

In the last decade, virtual reality (VR) systems have been used to enhance the visualization of design projects. The VR techniques allow to the designer interacting and modelling in a more intuitive and e cient way. Current 3D and animated simulation tools are a new chal- lenge for 3D visualization. In this paper we propose a general VR com- puting platform that enables real time visualization of 3D scenarios for manufacturing and forensic simulations. The platform is able to treat static and dynamic 3D environments, allowing to share the experience of navigation in the scene among the users, even geographically distributed. The platform proposed is validated through a case study using real time 3D models manipulations and interaction in a simulated car crash. Eje: Workshop Computación gráfica, imágenes y visualización (WCGIV) Red de Universidades con Carreras en Informática (RedUNCI)

Some time ago Virtual Reality and Augmented Reality were exclusively devoted to the gaming industry. Nowadays, both technologies are experiencing a deep interest from various spheres, including healthcare sector. The new infectious disease COVID-19 has had a catastrophic effect on the world’s demographics. Many patients with mild or severe COVID- 19 do not recover completely and present with a wide variety of chronic symptoms after infection, often of a neurological, cognitive or psychiatric nature. The most common signs of cognitive disorder can be summarized as mental fog, memory problems and concentration problems. The aim of this study was to analyze the opportunities for Virtual and Augmented Reality in the cognitive interventions related to mentioned disorders by searching for articles in scientific databases. We conclude that as these technologies and devices become cheaper and accessible worldwide, can at least be regarded as a rehabilitation therapy as effective as traditional training, and to some extent better than it. Workshop: WCGIV - Computación Gráfica, Imágenes y Visualización Red de Universidades con Carreras en Informática