A survey on pseudonym changing strategies for Vehicular Ad-Hoc Networks

The initial phase of the deployment of Vehicular Ad-Hoc Networks (VANETs) has begun and many research challenges still need to be addressed. Location privacy continues to be in the top of these challenges. Indeed, both of academia and industry agreed to apply the pseudonym changing approach as a solution to protect the location privacy of VANETs'users. However, due to the pseudonyms linking attack, a simple changing of pseudonym shown to be inefficient to provide the required protection. For this reason, many pseudonym changing strategies have been suggested to provide an effective pseudonym changing. Unfortunately, the development of an effective pseudonym changing strategy for VANETs is still an open issue. In this paper, we present a comprehensive survey and classification of pseudonym changing strategies. We then discuss and compare them with respect to some relevant criteria. Finally, we highlight some current researches, and open issues and give some future directions

Diseases Related to Maternal Mortality in Wad Medani Obstetrics and Gynecology Teaching Hospital, Sudan (2011-2014)

Worldwide an estimated 529,000 girl and woman die of pregnancy related causes each year about one every minute and many time that number suffer long term injuries and disabilities.  99% of all maternal death occurs in the developing world (WHO 2005). In Sudan many women's dies due to pregnancy related complications, and those who survive suffer from sever maternal morbidity. This study aimed to explore    the most common diseases related to maternal mortality in Sudan with references to Wad Medani Obstetrics and Gynecology Teaching Hospital during the period (2011-2014). The study used data collected from Wad Medani obstetrics and Gynecology Teaching Hospital annual reports for which data were completed and available include 245 cases. For data analysis the study used descriptive analytical methodology and Chi-square test.  The result revealed that the indirect causes of maternal deaths    responsible of 69.7% including, malaria, cancer, heart diseases, liver diseases and jaundice. While the direct cusses represent 30.3 of maternal death and this include Hemorrhage, bleeding poisoning, abortion and eclampsia. The study recommended that raising the awareness of women with the importance of follow up visit during pregnancy and after delivery. Also the study recommended that working to sustain malaria fighting program and intensify the effort in this regard

A National Perspective on the Factors Involved in the Lack of E-commerce in Algeria

The major goal of this work is to identify the key factors that affect e-commerce adoption in Algeria from macro perspective. In order to do so, four main infrastructures extracted from literature review have been used to determine the nature of the barriers that have prevented e-commerce from taking off as expected and to explain why Algeria lags behind other countries with similar economic conditions. The results of this investigation demonstrate that, although most of the infrastructures are still growing, but the country still lags behind in terms of its capabilities for providing the required infrastructure for e-commerce

Designing Ranking System for Chinese Product Search Engine Based on Customer Reviews

With the spread of e-commerce platforms, it becomes extremely difficult for the costumer to choose the right product from a large number of products, and different sellers based only on his/her own experience, product picture and meta-data. Customer’s reviews present a rich source of information that have an enormous impact on the purchasing decision of the potential consumers, but reading all of the available reviews is a hard task and time consuming. Thus, the automated mining of these reviews and extract product features in order to generate a raking system present a valuable and useful tool for consumers to make well-versed decision. In this paper, we propose a product search ranking mechanism based on costumers reviews written in Chinese language. We score each product using the features extracted from the reviews. Also, a ranking function has been developed. The proposed research evaluated using customer reviews of two famous brands of mobile phones: Apple and Samsung from taobao.com. The evaluation shows a promising result compared to the existing systems

HPDM: A Hybrid Pseudonym Distribution Method for Vehicular Ad-hoc Networks

AbstractProtecting the location privacy of drivers is still one of the main challenges in Vehicular Ad-hoc Networks (VANETs). The changing of pseudonym is commonly accepted as a solution to this problem. The pseudonyms represent fake vehicle identifiers. Roadside Units (RSUs) play a central role in the existing pseudonyms distribution solutions. Indeed, the VANET area should totally be covered by RSUs in order to satisfy the demand of vehicles in terms of pseudonyms. However, the total coverage is costly and hard to be achieved, especially in the first phase of VANETs deployment. In addition, RSUs could be overloaded due to the large number of pseudonyms requests that could be received from vehicles. In this paper, we propose a new hybrid pseudonyms distribution method, called HPDM that relies not only on RSUs but also on vehicles to perform the pseudonyms distribution. The analysis demonstrate that HPDM is privacy and accountability preserving. The performance evaluation of the proposed method is carried out using veins framework based on OMNet++ network simulator and SUMO mobility engine and shows its feasibility

dSDiVN: a distributed Software-Defined Networking architecture for Infrastructure-less Vehicular Networks

In the last few years, the emerging network architecture paradigm of Software-Defined Networking (SDN), has become one of the most important technology to manage large scale networks such as Vehicular Ad-hoc Networks (VANETs). Recently, several works have shown interest in the use of SDN paradigm in VANETs. SDN brings flexibility, scalability and management facility to current VANETs. However, almost all of proposed Software-Defined VANET (SDVN) architectures are infrastructure-based. This paper will focus on how to enable SDN in infrastructure-less vehicular environments. For this aim, we propose a novel distributed SDN-based architecture for uncovered infrastructure-less vehicular scenarios. It is a scalable cluster-based architecture with distributed mobile controllers and a reliable fall back recovery mechanism based on self-organized clustering and failure anticipation.Comment: 12 pages, 5 figures, accepted in I4CS201

On (ɱ,ɳ)-Strongly Fully Stably Banach Algebra Modules Related to an Ideal of Am ×ɳ

في هذا البحث تم دراسة مفهوم مقاسات بناخ الاجبرا تام الاستقراية من النمط (ɱ,  ) بالنسبة الى مثالي Am ×ɳ و دراسة بعض خواصه.قد تم برهنت العديد من العلاقات منها يكون المقاس X  تام الاستقرارية من النمط (ɱ,ɳ) بالنسبة الى مثالي  اذا وفقط اذا لاي محموعتين جزئيتين من العناصر من النمط ɱ  و  من Ӽɳ و ادا كان  لكل j = 1, …, ɱ,  i = 1,…, ɳ و  و  يؤدي الى Ạɳ( ) Ạɳ(The aim of this paper is introducing the concept of (ɱ,ɳ) strong full stability B-Algebra-module related to an ideal. Some properties of (ɱ,ɳ)- strong full stability B-Algebra-module related to an ideal have been studied and another characterizations have been given. The relationship of (ɱ,ɳ) strong full stability B-Algebra-module related to an ideal that states,  a B- -module Ӽ is (ɱ,ɳ)- strong full stability B-Algebra-module related to an ideal  , if and only if  for any two ɱ-element sub-sets and of Ӽɳ, if , for each j = 1, …, ɱ,  i = 1,…, ɳ  and   implies Ạɳ( ) Ạɳ(  have been proved.

Secure and private management of healthcare databases for data mining

© 2015 IEEE. There has been a tremendous growth in health data collection since the development of Electronic Medical Record (EMR) systems. Such collected data is further shared and analyzed for diverse purposes. Despite many benefits, data collection and sharing have become a big concern as it threatens individual privacy. In this paper, we propose a secure and private data management framework that addresses both the security and privacy issues in the management of medical data in outsourced databases. The proposed framework ensures the security of data by using semantically-secure encryption schemes to keep data encrypted in outsourced databases. The framework also provides a differentially-private query interface that can support a number of SQL queries and complex data mining tasks. We experimentally evaluate the performance of the proposed framework, and the results show that the proposed framework is practical and has low overhead

Automatic identification of rhetorical relations among intra-sentence discourse segments in Arabic

© 2019 Inderscience Enterprises Ltd. Identifying discourse relations, whether implicit or explicit, has seen renewed interest and remains an open challenge. We present the first model that automatically identifies both explicit and implicit rhetorical relations among intra-sentence discourse segments in Arabic text. We build a large discourse annotated corpora following the rhetorical structure theory framework. Our list of rhetorical relations is organised into three level hierarchies of 23 fine-grained relations, grouped into seven classes. To automatically learn these relations, we evaluate and reuse features from literature, and contribute three additional features: accusative of purpose, specific connectives and the number of antonym words. We perform experiments on identifying fine-grained and coarse-grained relations. The results show that compared with all the baselines, our model achieves the best performance in most cases, with an accuracy of 91.05%

Biochemical and hematological profile of different breeds of goat maintained under intensive production system

The aim of the study was to monitor the health and nutritional status of Kuwaiti’s Aradi and exotic Damascus and Barbari goat breeds raised under an intensive system of production through the determination of biochemical parameters and hematology profiles. The study was conducted during the summer season and blood samples were collected from lactating does and Damascus bucks. According to the findings of the present study, concentrations for glucose ranged from 60.75 to 71.76 mg/dl, for blood urea nitrogen (BUN) between 25 and 60 mg/dl, for creatinine between 1.2 and 1.9 mg/dl, for albumin between 3.7 g/dl and 4.05 g/dl, and total protein between 6.0 and 6.98 g/dl and in general were within the normal ranges for goats. The hematology profiles of Damascus bucks showed normal range for the most contents of white blood cells, apart from monocytes (M)%. At the same time, number of red blood cells was within the normal range (11.20-11.90 × 106/μL). However, hematocrit (HCT) % was lower (12.1-14.0) and mean corpuscular volume (MCV) content was higher (11.30 fL) compared to values reported for healthy goats in previous studies. The hematology profiles of lactating does of all breeds were within the normal range for white blood cells (8.05-12.88 × 103/μL) and red blood cell (10.44-12.65 × 106/μL). Low hemoglobin levels and a significantly (P<0.05) lower mean platelet volume (MPV), procalcitonin (PCT) and platelet distribution width (PDW) were found in Damascus does compared to the other examined breeds. The data of the present study could serve as reference values, since this is the first time that biochemical and hematological parameters were determined in Aardi, Damascus and Barbari goats managed under an intensive production system in Kuwait. These data can be used in the realistic evaluation and improving the management practices, nutrition, and monitoring health status and diagnosis of diseases.Keywords: Blood biochemical parameters, hematology profile, Damascus, Barbari, Aardi, intensive production syste