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Symmetry ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 1908
Author(s):  
Alexandru Boitan ◽  
Ireneusz Kubiak ◽  
Simona Halunga ◽  
Artur Przybysz ◽  
Andrzej Stańczak

The protection of information processed electronically involves a large number of IT devices from computer sets or laptops to monitors, printers, servers, etc. In many cases, classified information processing might be associated with the use of projectors, which are an indispensable element of meetings for a limited group of people. Such devices are connected to computers through interfaces of various analogue and digital standards and can become an additional source of unwanted emissions, and the distinctive features of these emissions allow the information displayed to be unwantedly reproduced. This paper offers evidence of the existing threat related to electromagnetic infiltration of several projectors, by showing images reconstructed from registered revealing emissions. The paper presents an analysis of several solutions that can be used to reduce the level of infiltration susceptibility of projectors or to highlight this property in the device assessment process. The possibilities of using special computer fonts and the so-called method of colors—background color and text color—is analyzed. The tests were carried out on randomly selected projectors in two independent laboratories, and, based on these results, a number of interesting conclusions have been highlighted at the end.


2020 ◽  
Vol 12 (06) ◽  
pp. 2050086
Author(s):  
Sayani Das ◽  
Sounaka Mishra

A [Formula: see text] vertex coloring of a graph [Formula: see text] partitions the vertex set into [Formula: see text] color classes (or independent sets). In minimum vertex coloring problem, the aim is to minimize the number of colors used in a given graph. Here, we consider three variations of vertex coloring problem in which (i) each vertex in [Formula: see text] dominates a color class, (ii) each color class is dominated by a vertex and (iii) each vertex is dominating a color class and each color class is dominated by a vertex. These minimization problems are known as Min-Dominator-Coloring, Min-CD-Coloring and Min-Domination-Coloring, respectively. In this paper, we present approximation hardness results for these problems for some restricted class of graphs.


Author(s):  
Masaya Ikoma ◽  
Brian Kenji Iwana ◽  
Seiichi Uchida
Keyword(s):  

Detecting and Identifying traffic sign is a complicated issue due to the changing variability in cloud conditions. Hence, it is necessary to identify and detect of traffic signs during journey. The traffic text sign identification fails due to noise, blur, distortion and occlusion. In order to identify the text, a technique should be adapted that recognizes the text with improved accuracy. In existing algorithms such as Histogram of Oriented Gradients (HOG) and Support Vector Machine (SVM) were not detecting the Centroid position. In this paper, the text Centroid of position sign is detected using text color, font and size. During journey, if the text is blurred, this Traffic Sign Detection Technique based on Centroid Position Identification (TSD-CPI) K-means algorithm for clustering is possible to use. As a result, it detects the text that with improved accuracy. Ultimately, it reduces the processing time. The experimental result reveals that using WEKA-3.8 with the proposed technique shows improvement over the existing algorithms in terms of precision and Recall which enhance the accuracy in text mining


GESTALT ◽  
2019 ◽  
Vol 1 (2) ◽  
pp. 227-240
Author(s):  
Rozie Muhammad ◽  
Eka Prasetya Adhy Sugara

 Palembang Grand Mosque is one of the oldest mosques in Palembang. The shape of this historic building has a lot of architectural rich heritage which holds noble values ​​and information important for the development of cultural and scientific understanding, so it needs to be protected, preserved and told its history in order to foster awareness of national identity and national interests, especially for young people. One form of disseminating information is to utilize animated video media. The use of video in the form of 3-dimensional animation can bring up visual images that look more real to stimulate the imagination of the audience so that it can be carried into the atmosphere of a more lively storyline. This research uses the stages of Pre-production which includes research information, determines visual concepts, letter concepts, color concepts and manuscript, the Production stage which includes sketching, modeling, texturing, animating and rendering and then Post-production which includes by providing transitions , video effects, sound effects, dubbing, music, giving text, color grading and ending with the final rendering. The results of this study are a video animation as information media about the history of the construction of the Great Mosque.


Author(s):  
Pavlo Bazilinskyy ◽  
Dimitra Dodou ◽  
Joost de Winter
Keyword(s):  

2019 ◽  
Vol 15 (07) ◽  
pp. 1369-1383
Author(s):  
S. Sharma ◽  
M. Rana

We are applying a new approach to interpret the generalized version of order 8 mock theta functions [Formula: see text] and [Formula: see text] in terms of [Formula: see text]-color partitions. In literature, we find the interpretations of these functions in terms of split [Formula: see text]-color partitions and signed partitions. In addition, we are interpreting the generalized versions of two mock theta functions of order 6 and two of order 5 in terms of [Formula: see text]-color partitions. A mock theta function of order 3 is interpreted in terms of [Formula: see text]-color partitions. We further extend our results using lattice paths.


2019 ◽  
Vol 8 (4) ◽  
Author(s):  
Dannielle Sehgal

Funk, Josh. How to Code a Sandcastle. Illustrated by Sara Palacios, Viking, 2018. How to Code a Sandcastle, written by Josh Funk, is endorsed as a “Girls Who Code” book. Founded in 2013, the mission of Girls Who Code is to close the gender gap in technology. One of the tools they use to help them reach their young female target audience is children’s literature. The story begins with the protagonist, Pearl, comically explaining a variety of challenges she encountered when building a sandcastle at the beach. Now, on the last day of her summer vacation, Pearl has decided to recruit the help of her robot, Pascal, to build her sandcastle. Pearl gives instructions to Pascal, using code, and explains the coding concepts of sequence, loop, and if-then-else to the reader as they relate to the task of building her sandcastle. These concepts are introduced and explained to the young readers in a fun and engaging manner. The text features of this book are eye catching and educational. Josh Funk strategically changes the text color to highlight coding vocabulary and he draws the reader’s attention to coding commands by changing the text font when Pearl is giving instructions to Pascal. Speech bubbles are used throughout the book in an appealing, non-linear manner. The illustrations are interesting, colourful, and visually captivating to all readers, young and old. The images are crafted with purpose as they enhance the reader’s ability to make meaning of the coding concepts by providing them with visual information to complement and reinforce the descriptions given in the text. The last two pages of the book, Pearl and Pascal’s Guide to Coding, give a more in-depth explanation of the coding concepts, providing extra support for children and adults who may be new to coding. This book is an entertaining and educational must read! Highly Recommended: 4 stars out of 4Reviewer: Dannielle Sehgal Dannielle Sehgal is a kindergarten teacher and graduate student at the University of Alberta. Dannielle is passionate about her career and loves discovering new picture books that she can bring to her classroom and read to her students.  


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