Cloud computing is an information technology that enables different users to access a shared pool of configurable system resources and different services without physically acquiring them. Most industries nowadays such as banking, healthcare and education are migrating to the cloud due to its efficiency of services especially when it comes to data security and integrity. Cloud platforms encounter numerous challenges such as Data deduplication, Data Transmission, Data Integrity, VM Security, Data Availability, Bandwidth usage… etc. In this paper we have adopted the Blockchain technology - which is a relatively new technology - that emerged for the first time as the cryptocurrency Bitcoin and proved its efficiency in securing data and assuring data integrity. It is mostly a distributed public ledger that holds transactions data in case of Bitcoin. In our work blockchains are adopted in a different way than its regular use in bitcoin. Three of the major challenges in Cloud Computing and Cloud services are Data Deduplication, Storage and Bandwidth usage are discussed in this paper.
Serious games are transcending the way of teaching and learning nowadays. Since serious games balance playful and educational aspects, it constitutes a privileged learning method for the digital natives. However, they are ubiquitous in today's society and their stakes and assets remain largely fuzzy. This paper describes different models and frameworks for serious game design. Between theoretical and technical consideration, authors propose a new reflection model that aims to help pedagogues guiding their conception of serious games. This model is a result of a thematic synthesis analyzing more than 40 texts offering a three-layered model covering the simplest to the most advanced design. Three study cases are announced to be conducted by the end of this year in order to challenge and evaluate this new model.
Cloud users can have access to the service based on “pay as you go.” The daily increase of cloud users may decrease the performance, the availability and the profitability of the material and software resources used in cloud service. These challenges were solved by several load balancing algorithms between the virtual machines of the data centers. In order to determine a new load balancing improvement; this article's discussions will be divided into two research axes. The first, the pre-classification of tasks depending on whether their characteristics are accomplished or not (Notion of Levels). This new technique relies on the modeling of tasks classification based on an ascending order using techniques that calculate the worst-case execution time (WCET). The second, the authors choose distributed datacenters between quasi-similar virtual machines and the modeling of relationship between virtual machines using the pre-scheduling levels is included in the data center in terms of standard mathematical functions that controls this relationship. The key point of the improvement, is considering the current load of the virtual machine of a data center and the pre-estimation of the execution time of a task before any allocation. This contribution allows cloud service providers to improve the performance, availability and maximize the use of virtual machines workload in their data centers.
This article presents the results of a survey conducted in 2014-2015 on the practices of economic intelligence within a population of 100 shipping companies in the area of TangerMed. The research objective is to check whether information management strategy and economic intelligence exists in these types of companies, and how to exploit internal and external information of the different actors in the same business in order to prevent risks, seize opportunities and to anticipate threats. Such type of companies lives in a context of economic struggle where they try to protect their status and promote their development. The research seeks to present practical situations and provide clear recommendations to resolve the difficulties threatening their existence on a daily basis. Data elicited from the respondents provide reliable results thanks to a well targeted sampling of interviewees. The activities of shipping companies are divided into four categories: shipping agents, ships' consignees, freight forwarders and forwarding agents. TangerMed area was chosen on the basis of the high concentration of shipping companies attracted by competitive advantages of the bustling port hub. The analysis of questionnaires revealed that 27 interviewees did not respond to questions knowing that the results discussed are derived from 73 questionnaires. It appears that the need for economic intelligence is an emerging concept in these types of companies, despite the considerable need to it. EI provides a number of advantages, in terms of organization, competitiveness and process. This study aims to increase knowledge of these type of companies. The approach is descriptive and explanatory, and thus allows room for the evaluation of the spread and ownership of the concept.
Information systems are defined as systems that consist of a group of people, data records, and some manual and non-manual operations. These systems generally handle data and information related to each system, and it can also be defined as a set of elements that overlap with each other to collect, process, store and distribute information on a specific topic. Systematically, in order to support the organization, control it, and the analysis, and form a clear current and future vision of the topic in question. Information systems are a group of programs that are used to archive, manage and organize data, and process them with specific procedures established according to the workflow mechanism in the organization, in order to obtain the final outputs. It is noteworthy that information systems are completely different from information technology, as information systems use information technology techniques which were created to serve its based business.
In order for development to be sustainable, strong and rich, it must be established in a common vision of all activities of society, so that each party decides and chooses to form it in its own way. In this context, it was necessary to "have" a parallel roadmap for this concept of human city planning, which is the strategic development of information systems through the concept of city planning for an information system that should represent the contribution of the value of different citizens. Thus, the information system can be compared to the city area: If the latter is well built and well civilized, it is possible to raze a building in the heart of the area without jeopardizing the entire sector, and replace it with or rebuild another building. A study of the stages of this urban expansion would provide the researcher and actor with a clear view of how the city was expanded, its directions, and its horizons, and thus contribute to preparing and managing the urban area of the city, and from the most effective means to do so, we find new technologies that have added a lot to studies Geographical indications, including geographical information systems and remote sensing, which are of great importance, given the aerial photographs and archive data they provide.
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