Gravo-thermal properties and formation of elliptical galaxies

We have analyzed a sample of galaxies belonging to three clusters: Coma, Abell 85, and Abell 496 (real galaxies) and a sample of simulated elliptical galaxies formed in a hierarchical merging scheme (virtual galaxies). We use the Sersic law to describe their light profile. The specific entropy (Boltzmann-Gibbs definition) is then calculated supposing that the galaxies behave as spherical, isotropic, one-component systems. We find that, to a good approximation (about 10%), both real and virtual galaxies have an almost unique specific entropy. Within this approximation the galaxies are distributed in a thin plane in the space defined by the three Sersic law parameters, which we call the Entropic Plane. A further analysis shows that both real and virtual galaxies are in fact located on a thin line, therefore indicating the existence of another - and yet unknown - physical property, besides the uniqueness of the specific entropy. A more careful examination of the virtual galaxies sample indicates a very small increase of their specific entropy with merging generation. In a hierarchical scenario, this implies a correlation between the specific entropy and the total mass, which is indeed seen in our data. The scatter and tilt of the Entropic Line, defined by Lima Neto et al. (1999a), are reduced when this correlation is taken into account. Although one cannot distinguish between various generations for real galaxies, the distribution of their specific entropy is similar to that in the virtual sample, suggesting that hierarchical merging processes could be an important mechanism in the building of elliptical galaxies

Merging the virtual and the real: A collaborative cross-reality game

In this paper, we present a collaborative cross-reality game for two players, Lab2, which blends tangible board game and immersive virtual reality playing spaces in a gameplay that aims to promote and train collaborative behaviour. As collaborative learning has been stressed as an effective teaching method for many years, Lab2 could assist learners in exploring and further developing their collaborative skills in a playful manner. One player controls a physical game board showing a moveable maze of “pathway” tiles, while the second uses a spatially tracked HMD to find himself inside a virtual-reality version of the game-board’s maze. The goal of the game is to collect a set of tokens hidden inside the maze. Reaching these tokens requires the players to collaborate via their complementary roles. We will first outline the game design concept and then detail the user-testing based evaluation of our game prototype

VIRTUAL TOUR CAGAR BUDAYA TAMANSARI DENGAN MENGGUNAKAN METODE AUGMENTED REALITY GUNA MENDUKUNG YOGYAKARTA SEBAGAI HERITAGE CITIES

Currently one of the emerging technologies that Augmented Reality (AR). Augmented Reality is a merger between the virtual objects with real objects. The merger between the virtual objects with real objects will provide information faster and more towards an object. Merging AR technology with telecommunications devices are very helpful in processing a virtual application. Promotion of travel by using AR technology is particularly suited to promote a tourist location whose territory is quite vast, but one example of cultural heritage Tamansari. AR technology with software Autodeks 3DS Max and Unity3D can be used to build applications Taman Sari virtual system to form a three-dimensional (3D). The results of this study useful for users who want to know more details about the cultural heritage Tamansari. This application allows the user to get to know the parts of the building and the location at Taman Sari and easier for people to find artifacts and browse through search Taman Sari Water Castle location-shaped virtual 3D animation

Real-Time Occlusion Handling in Augmented Reality Based on an Object Tracking Approach

To produce a realistic augmentation in Augmented Reality, the correct relative positions of real objects and virtual objects are very important. In this paper, we propose a novel real-time occlusion handling method based on an object tracking approach. Our method is divided into three steps: selection of the occluding object, object tracking and occlusion handling. The user selects the occluding object using an interactive segmentation method. The contour of the selected object is then tracked in the subsequent frames in real-time. In the occlusion handling step, all the pixels on the tracked object are redrawn on the unprocessed augmented image to produce a new synthesized image in which the relative position between the real and virtual object is correct. The proposed method has several advantages. First, it is robust and stable, since it remains effective when the camera is moved through large changes of viewing angles and volumes or when the object and the background have similar colors. Second, it is fast, since the real object can be tracked in real-time. Last, a smoothing technique provides seamless merging between the augmented and virtual object. Several experiments are provided to validate the performance of the proposed method

RANCANGAN MEDIA PEMBELAJARAN BERUPA APLIKASI AUGMENTED REALITY BERBASIS ANDROID

Abstract-Augmented Reality (AR) is a technology that combines objects from the real world and virtual objects in real-time conditions. The merging of real and virtual objects occurs with the support of the right technology while the interactions that are carried out can occur using certain devices. AR is a breakthrough in the field of very sophisticated technology. Because with this technology we can make all abstract or virtual things look real or real. So that researchers apply the Waterfall Media AR Mobile Learning Method to be able to display 3D images and animations in class VIII math subjects, specifically geometric shapes including: blocks, balls, cones, cubes, pyramids, prisms, and tubes, Provides convenience for teachers to add insight into the use of AR learning media in increasing student motivation and interest in learning at SMP NEGERI 1 Bengkulu City. Provides convenience for teachers to add insight into the use of AR learning media in increasing student motivation and interest in learning at SMP NEGERI 1 Bengkulu City. Based on the results of testing the learning media application in the form of Android-based Augmented Reality application as expected based on the menu being tested. &nbsp

Architectonics of Game Spaces

What consequences does the design of the virtual yield for architecture and to what extent can the nature of architecture be used productively to turn game-worlds into sustainable places - over here, in »reality«? This pioneering collection gives an overview of contemporary developments in designing video games and of the relationships such practices have established with the design of architecture. Due to their often simulatory nature, games reveal constructions of reality while positively impacting spatial ability and allowing for alternative avenues to complex topics and processes of negotiation. Granting insight into the merging of the design of real and virtual environments, this volume offers an invaluable platform for further debate

Architectonics of Game Spaces: The Spatial Logic of the Virtual and Its Meaning for the Real

What consequences does the design of the virtual yield for architecture and to what extent can the nature of architecture be used productively to turn game-worlds into sustainable places - over here, in "reality"? This pioneering collection gives an overview of contemporary developments in designing video games and of the relationships such practices have established with the design of architecture. Due to their often simulatory nature, games reveal constructions of reality while positively impacting spatial ability and allowing for alternative avenues to complex topics and processes of negotiation. Granting insight into the merging of the design of real and virtual environments, this volume offers an invaluable platform for further debate