The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In this paper, we propose a method for representing “neighborhoods” of moving objects such as people. By using neighborhoods, it is possible to determine whether the spatial relations between objects and their surrounding spatial information are strong. It can be said that a neighborhood is the spatial area of an object's attention, interest or concern. It is preferable that neighborhoods move while...
There is evidence that women tend to be underrepresented in computer science programs (CS) in many countries. Based on this fact, we analyzed the gender situation in Costa Rica finding that this situation also applies to the four public universities in the country. Furthermore, similar to the case of the U.S., the percentage of women graduating from CS programs from such universities is decreasing...
This paper describes our continued work in creating a set of narrated dynamically worked-out problems and the team based in-class problem solving for the Electric Circuits students to improve their problem-solving skills by understanding the key concepts and the way that they should be utilized in solving circuits' problems. The dynamically worked out problems, consists of problem solution annotated...
The present research study aims at detecting and recording Upper Secondary School students' criteria regarding the suitability of various calculating packages — including one specially designed and developed by the researchers- to assist teaching and problem solving electrical circuits. For the above purposes 69 Upper Secondary School students aged from 16 to 17 (male and female), after having undergone...
MS Excel VBA (Visual Basic for Application) has been used to develop GChem, an application to help students learn basic concepts in Chemistry. This application which contains seven modules, is an improved version of the same application developed previously which only has five modules. In addition to electrochemistry, pH of acid base, molecular weight calculator, empirical formula and thermochemistry,...
Genes acquire many changes and modifications during evolution producing many orthologous and paralogous. One of the main challenges for biologist is tracing back the origin of modified genes in the genomes of various organisms. Tracing genes modifications and developments from the ancestors to offsprings is however a massive task for biologists. Thus, computer programs can help biologists tracking...
The PRESENT cipher is a symmetric block cipher with 64 bits of data block and 80 (or 128) bits of key. It is based on Substitution-permutation network and consists of 31 rounds. PRESENT is intended to be implemented in small embedded and contactless systems, thus its design needs only small amount of chip area and consumes low power. In this work we evaluate the resistance of PRESENT against time-memory...
In this paper, with computer assistance, all the nonnegative integral solutions to an exponential Diophantine equation are determined by elementary method.
This paper introduces the problem of computing the shortest Euclidean path of a plural number of sequenced spherical balls in 3D. Based on the author's previous works and the technique of pair-wisely local optimization, a heuristic algorithm was proposed to solve the problem. Empirical results are competing with random selection and the nearest neighbor search algorithm. The experiments have shown...
In this paper, we consider a way as a cloud platform in keeping with green IT. A cloud platform can create a high performance environment consisting of ordinary PCs. However, it has continuous energy requirements. This is undesirable in terms of environmental concerns, because of the increased CO2 emissions from generating the required electricity. Therefore, this study aimed at realizing a cloud...
We propose application of method, based on notion of computer capacity, for evaluating the performance of computer systems. Computer capacity is based on the number of different tasks that can be executed in a given time. This characteristic determined only by the computer architecture, and it can be easily computed at the design stage and used for optimizing architectural decisions.
In this paper, the parallel decoupling algorithm is given to solve the block tri-diagonal linear equations. The solution process of the algorithm are as follows: Firstly, decoupling method is used to decompose the huge block tri-diagonal linear equations to even number small block tri-diagonal ones with balancing loadings, and sum of the small blocks tri-diagonal linear equations equals the number...
A partition of a positive integer is defined as a way of writing as an unordered sum of one or more positive integers. After it was first proposed by Leonhard Euler, many mathematicians and computer scientists have been interested in studying it. They used many kinds of researching tools and methods and have obtained a series of achievements which are widely used in graph theory and combinatorial...
The hardware implementations of decimal arithmetic operations, which are commonly used in financial, scientific, and internet-based applications requiring accuracy and speed, become prominent. In this paper we first analyze the column sum boundaries of n-digit parallel decimal array multipliers (PDAM). A general form of the problem is formed and a heuristic solution is found with Genetic Algorithm...
Tonal music has had a rich history in Video Games and movies, and in fact, music generation has played a minor role in the history of game music as well. Recent developments in Music Theory has derived representions of chord progressions using geometric topologies. Unlike prior generative music, the framework proposed in this paper attempts to approach tonal music generation by building networks of...
In this paper we study the computability of the solution operator initial value problem of Camassa-Holm equation. Define a nonlinear map K from the initial date to the solution. By using Sobolve spaces and Type-2 theory of effectivity, we proved that for s >3/2 the map K is Turing computable and thus enrich the theory of computability on nonlinear equation's solution.
Many optimization problems that frequently arise and have been extensively used in practice are modeled as linear mixed-integer programming problems. Among the many of such problems are transportation and assignment problems. In such problems, constraints that couple decision variables can be viewed as hyperplanes in their respective spaces. These hyperplanes frequently intersect at different angles...
In this paper, a new recursive multibit recoding multiplication algorithm is introduced. It provides a general space-time partitioning of the multiplication problem that not only enables a drastic reduction of the number of partial products (N/r), but also eliminates the need of pre-computing odd multiples of the multiplicand in higher radix (r≥3) multiplication. Based on a mathematical proof that...
Natural selection acts as a culling force that favors highly fit organisms. There are numerous examples ranging from bacteria through humans showing fitness can sometimes improve if individuals cooperate. Yet despite the widespread evidence of cooperation throughout nature, we still do not fully understand how it evolves. Over the past 10–15 years a large number of theoretical (computer) models have...
This paper proposed an integrated fuzzy approach based on Consistent Fuzzy Preference Relations (CFPR) and Generalized TOPSIS. The procedure of CFPR are improved by adapting Centroid-Index as defuzzification operator, in order to represent the whole set of fuzzy numbers correctly. The CFPR requires only (n-1) pair-wise comparisons for n given criteria, where this situation prove that the increasing...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.