Open Access Opinion Article

Never Trust Anyone: Trust-Privacy Trade-offs in Vehicular Ad-Hoc Networks

Amit Kumar Tyagi, Sreenath Niladhuri, R. Priya

Journal of Advances in Mathematics and Computer Science, Page 1-23
DOI: 10.9734/BJMCS/2016/27737

Due to the rapid development of networking and communications technologies, it has made more convenient for consumers to interact with each other to exchange information in Location Based Services (LBSs) and to share digital contents, making privacy and trust protection one of the primary concerns in history of information security. Therefore, in such applications like carpooling, parking no one is trusted (i.e. applications of Vehicular Ad hoc Network (VANET)). In VANET before a genuine communication starts, certain level of trust must be set up among the cooperating substances, which may require that some data that may contain privacy about the entities which is to be shared among the entities. Thus, privacy protection and trust establishment are inter-related issues that ought to be legitimately adjusted to guarantee both a smooth correspondence and for appropriate security insurance or privacy protection. A service request typically reveals the identity (for example, IP address or caller ID) of the user but may incorporate other individual data, for example, area, time, and the kind of the service on demand. This data empowers a Location Service Provider (LSP) to construe after some time a thorough client profile with a high level of accuracy, which thus makes a huge potential for privacy invasions. The exchange of such information can be result of loss of privacy and trust among users and infrastructure. To protect such privacy, several efforts have made in past including Mix Zones. This work discusses maximum facts to improve trust, preserved privacy (with proposing a new design in spite of mix zone which has not been proposed before,), and trade-offs among them, in result this proposal saves time, fuel and cost of vehicle users. Finally, this work concludes that to gain a higher level of trust just, be self–secured i.e. not to disclose everything to someone else, because in this current world, we cannot trust perfectly on anyone.

Open Access Original Research Article

Achieving More Coherent Summaries in Automatic Text Summarization; an Ontology-based Approach

Majid Ramezani, Mohammad-Reza Feizi-Derakhshi

Journal of Advances in Mathematics and Computer Science, Page 1-15
DOI: 10.9734/BJMCS/2016/27549

Since the growth of information available on the internet has grown out of hand, automation of text summarization process has become more important. Summaries that are in the form of a condensed version of original text, containing its important information, and considered as a good alternative to reading the original text. One of the main requirements of the machine produced texts, is their coherence and the semantic relation between their sentences. Reading a non-coherent summary, in spite of that does not help the readers become aware of the information in the original text, it also creates confusions in their mind. The main purpose of this paper is how to achieve more coherent summaries in automatic text summarization process. For this purpose there has been a system designed, that using the concepts of ontology, automatically summarizes Persian documents, and tries to produce more coherent summaries. In this light, a technique has been devised that based on it, presence of a sentence in the summary, increases the probability of choosing its adjacent sentences. The FarsNet ontology is the basis for ontology-based calculations in this paper. The results show that the suggested approach succeeds in producing coherent summaries.

Open Access Original Research Article

Three-dimensional MHD Mixed Convection Casson Fluid Flow over an Exponential Stretching Sheet with the Effect of Heat Generation

Kankanala Sharada, B. Shankar

Journal of Advances in Mathematics and Computer Science, Page 1-8
DOI: 10.9734/BJMCS/2016/29454

In this article, the governing equation which models the problem of steady three-dimensional Casson fluid flow over an exponentially stretching surface in the presence of Lorentz force is investigated. We have considered the effects of heat generation and mixed convection. Similarity transformations are used to convert the partial differential equations to set of ordinary differential equations. These equations are solved by applying Keller Box method. The effects of Magnetic parameter, mixed convection parameter, heat source/sink, Casson parameter, ratio parameter are investigated on the velocity and temperature profiles graphically.

Open Access Original Research Article

Some Fıxed Poınt Theorems ın Ab -Metrıc Space

Manoj Ughade, Duran Turkoglu, Sukh Raj Singh, R. D. Daheriya

Journal of Advances in Mathematics and Computer Science, Page 1-24
DOI: 10.9734/BJMCS/2016/29828

In this paper, we introduce the notion of A-metric space and to study its basic topological properties. We prove some fixed point theorems under different contraction and expansion type conditions in the setting of A-metric space and partially ordered Ab -metric space.Our results generalize and extend various results in the existing literature.

Open Access Original Research Article

Statistical Analysis of Weight Gain of Children Under-five Years in the Kintampo Municipality, Ghana

Isaac Zingure, Abukari Alhassan, Jakperik Dioggban

Journal of Advances in Mathematics and Computer Science, Page 1-11
DOI: 10.9734/BJMCS/2016/29302

Aims/Objectives: The study aims at using statistical models to assess the change in weight of children over time and to investigate whether some maternal and baby’s characteristics directly influence those changes. Also to determine if there is significant difference in weight gain between male and female children under-five years.

Study Design: The study design is a repeated measures case study.

Place and Duration of Study: The key area of the study involved Ghana Health Service, Department of Public Health, (Child Health Unit), in the Kintampo municipality, between July 2014 to March 2016.

Methodology: The monthly repeated measurement data was collected from one hundred and fifteen (115) children less than five years (56 male and 59 female), in the Kintampo municipality. Multivariate Analysis of Variance and Profile Analysis were employed to ascertain the significant factors influencing weight gain.

Results: The study revealed that, the mean birth weight for both male and female children were 3.06kg and 2.96kg respectively, which were higher than the World Health Organization standard birth weight of 2.5kg. The multivariate analysis of variance disclosed that feeding type and parity were statistically significant, (P<0.05), in determining weight gain of children less than five years. The test of main effects of feeding and sex were significant. However, their interaction effect was not significant (>0.05), suggesting that male and female children do not differ significantly in terms of weight gain.

Conclusion: The effect of feeding on weight gain follows the same pattern for both male and female children. Moreover, feeding type and parity are important factors influencing weight gain.

Open Access Original Research Article

Computing the Determinant and Inverse of the Complex Fibonacci Hermitian Toeplitz Matrix

Jixiu Sun, Zhaolin Jiang

Journal of Advances in Mathematics and Computer Science, Page 1-16
DOI: 10.9734/BJMCS/2016/30398

In this paper, we consider the determinant and the inverse of the complex Fibonacci Hermitian Toeplitz matrix. We first give the definition of the complex Fibonacci Hermitian Toeplitz matrix. Then we compute the determinant and inverse of the complex Fibonacci Hermitian Toeplitz matrix by constructing the transformation matrices.

Open Access Original Research Article

An ROBDD Algorithm for the Reliability of Double-Threshold Systems

Ali Muhammad Ali Rushdi, Hasan Ahmed Bjaili

Journal of Advances in Mathematics and Computer Science, Page 1-17
DOI: 10.9734/BJMCS/2016/30264

A double-threshold system (DTS) is a system that is successful if and only if the weighted arithmetic sum of its successes/failures equals or exceeds a certain threshold T1 and is smaller than or equal to a certain threshold T2. Generally a DTS is neither symmetric nor coherent. The DTS reduces for positive weights to a weighted k-to-l-out-of-n:G system, whose symmetric special case is the k-to-l-out-of-n:G system. Another important special case of the DTS is the threshold system (TS), commonly known for positive weights as the weighted k-out-of-n system. The paper presents the fundamental properties of the DTS. Recursive relations covering a DTS are given together with various possible sets of boundary conditions. Based on these, a novel recursive algorithm for computing the reliability of a DTS is described, and then demonstrated via an illustrative example using the signal ow graph technique together with probability map interpretation. The DTS recursive algorithm developed herein is an extension of earlier algorithms for (single-) threshold systems and for k-out-of-n systems. The current algorithm as well as these former algorithms are shown to be equivalent to implementation of the Reduced Ordered Binary Decision Diagram (ROBDD).