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Search Results: 1 - 10 of 2735 matches for " Ismail Hababeh "
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Data Migration among Different Clouds
Ismail Hababeh
Computer Science , 2015,
Abstract: Cloud computing services are becoming more and more popular. However, the high concentration of data and services on the clouds make them attractive targets for various security attacks, including DoS, data theft, and privacy attacks. Additionally, cloud providers may fail to comply with service level agreement in terms of performance, availability, and security guarantees. Moreover, users may choose to utilize public cloud services from multiple vendors for various reasons including fault tolerance and availability. Therefore, it is of paramount importance to have secure and efficient mechanisms that enable users to transparently copy and move their data from one provider to another. In this paper, we explore the state of the art inter cloud migration techniques and identify the potential security threats in the scope of Hadoop Distributed File System HDFS. We propose an inter cloud data migration mechanism that offers better security guarantees and faster response time for migrating large scale data files in cloud database management systems. The proposed approach enhances the data security processes used to achieve secure data migration between cloud nodes thus improves applications response time and throughput. The performance of the proposed approach is validated by measuring its impact on response time and throughput, and comparing the performance to that of other techniques in the literature.
Modeling and Simulation Study of Space Data Link Protocol  [PDF]
Ismail Hababeh, Rizik M. H. Al-Sayyed, Ja’far Alqatawna, Yousef Majdalawi, Marwan Nabelsi
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2014, DOI: 10.4236/ijcns.2014.710045
Abstract: This research paper describes the design and implementation of the Consultative Committee for Space Data Systems (CCSDS) standards REF _Ref401069962 \r \h \* MERGEFORMAT [1] for Space Data Link Layer Protocol (SDLP). The primer focus is the telecommand (TC) part of the standard. The implementation of the standard was in the form of DLL functions using C++ programming language. The second objective of this paper was to use the DLL functions with OMNeT++ simulating environment to create a simulator in order to analyze the mean end-to-end Packet Delay, maximum achievable application layer throughput for a given fixed link capacity and normalized protocol overhead, defined as the total number of bytes transmitted on the link in a given period of time (e.g. per second) divided by the number of bytes of application data received at the application layer model data sink. In addition, the DLL was also integrated with Ground Support Equipment Operating System (GSEOS), a software system for space instruments and small spacecrafts especially suited for low budget missions. The SDLP is designed for rapid test system design and high flexibility for changing telemetry and command requirements. GSEOS can be seamlessly moved from EM/FM development (bench testing) to flight operations. It features the Python programming language as a configuration/scripting tool and can easily be extended to accommodate custom hardware interfaces. This paper also shows the results of the simulations and its analysis.
A New Approach for Database Fragmentation and Allocation to Improve the Distributed Database Management System Performance  [PDF]
Rizik M. H. Al-Sayyed, Fawaz A. Al Zaghoul, Dima Suleiman, Mariam Itriq, Ismail Hababeh
Journal of Software Engineering and Applications (JSEA) , 2014, DOI: 10.4236/jsea.2014.711080
Abstract: The efficiency and performance of Distributed Database Management Systems (DDBMS) is mainly measured by its proper design and by network communication cost between sites. Fragmentation and distribution of data are the major design issues of the DDBMS. In this paper, we propose new approach that integrates both fragmentation and data allocation in one strategy based on high performance clustering technique and transaction processing cost functions. This new approach achieves efficiently and effectively the objectives of data fragmentation, data allocation and network sites clustering. The approach splits the data relations into pair-wise disjoint fragments and determine whether each fragment has to be allocated or not in the network sites, where allocation benefit outweighs the cost depending on high performance clustering technique. To show the performance of the proposed approach, we performed experimental studies on real database application at different networks connectivity. The obtained results proved to achieve minimum total data transaction costs between different sites, reduced the amount of redundant data to be accessed between these sites and improved the overall DDBMS performance.
Water Balance Analysis at Karangmumus River Basin Area (RBA) Samarinda City
Makara Seri Sains , 2009,
Abstract: Karangmumus RBA to getting degradation pressure being concrete drying and flooding so much to frighten. Climate data from BMG Temindung and SPAS Lempake has to water balance analysis based on Hewlett and Nutter methode. This region have the Area Class III (1500–2000 mm/year). With the bimodel or double wave rainfall models with C patern. The hight rainfall depth periode at December and April, therefore the low rainfall depth at September and November. Have level Q = ± 9.9%, or rainfall tipe A (very wet area with tropical wet vegetation) and E1 agroclimte zone. Water balance monthly indicated that this area have to water surplus 8 month, i.e. January (27.0 mm), February (57.3 mm), March (119.7 mm), April (72.8 mm), May (48.4 mm), Juni (19.6 mm), November (58.7 mm) and December (75.3 mm), or total amounts water surplus 478.8 mm/year. The water deficits at Juni (0.4 mm), July (0.3 mm), Augus (3.9 mm), September (13.6 mm) and October (26.7 mm) or total amount water deficits (44.5 mm/year).
Financial Risk Measurement for Turkish Insurance Companies Using VaR Models  [PDF]
Ismail Yildirim
Journal of Financial Risk Management (JFRM) , 2015, DOI: 10.4236/jfrm.2015.43013
Abstract: This study aims to measure the foreign exchange risks that the insurance companies are exposed to. In this context, this study analyzes 7 insurance companies listed in Borsa Istanbul (Istanbul Stock Exchange). The foreign exchange risks that the insurance companies are exposed to were measured using VaR models, Historical Simulation and Monte Carlo Simulation methods. Data obtained from the analysis show the losses that the insurance companies suffer due to exchange risk. The losses calculated using the Monte Carlo Simulation were found to be greater than the losses calculated using Historical Simulation.
Hydromorphological Mapping and Analysis for Characterizing Darfur Paleolake, NW Sudan Using Remote Sensing and GIS  [PDF]
Samy Ismail Elmahdy
International Journal of Geosciences (IJG) , 2012, DOI: 10.4236/ijg.2012.31004
Abstract: The north-western part of Sudan, which is the driest region on earth has revealed newly surface and near surface paleodrainage network underneath sand sheets indicating the possibilities for economic groundwater reservoirs. Advanced Space-born Thermal Radiometer (ASTER), the Shuttle Radar Topography Mission (SRTM ~90 m) DEMs and Quickbird images corroborate the presence of surface and near surface paleodrainage network. Bivariate quadratic surfaces with moving window size of 3 × 3 were fitted to the SRTM DEM. The second derivative surface curvature was calculated to reveal landform classes that may receive most of fossil water. The results showed that the new unnamed depression which recharges by a longitudinal paleodrainage network may receive vast amount of groundwater during humid phases. The results demonstrate that the D8 and curvature algorithms are very efficient tools for revealing and characterizing hydrological elements in arid and semi-arid regions and they provide information for hydrological exploration in remote deserts over large scale prior to geophysical survey.
Overcoming Object Misalignment in Geo-Spatial Datasets  [PDF]
Ismail Wadembere, Patrick Ogao
Journal of Geographic Information System (JGIS) , 2014, DOI: 10.4236/jgis.2014.64028

In integrating geo-spatial datasets, sometimes layers are unable to perfectly overlay each other. In most cases, the cause of misalignment is the cartographic variation of objects forming features in the datasets. Either this could be due to actual changes on ground, collection, or storage approaches used leading to overlapping or openings between features. In this paper, we present an alignment method that uses adjustment algorithms to update the geometry of features within a dataset or complementary adjacent datasets so that they can align to achieve perfect integration. The method identifies every unique spatial instance in datasets and their spatial points that define all their geometry; the differences are compared and used to compute the alignment parameters. This provides a uniform geo-spatial features’ alignment taking into consideration changes in the different datasets being integrated without affecting the topology and attributes.

Information Reach and Range Impact on Interorganizational Systems Platforms  [PDF]
Ismail M. Romi
Intelligent Information Management (IIM) , 2014, DOI: 10.4236/iim.2014.61001

Organizations tend to use information systems (IS) applications that require data to be exchanged between different parties, while data exchange is restricted with information reach and range, which determines the organizations’ IT platform. To determine the best platform, a comparison between electronic data interchange (EDI) and web services was conducted depending on certain criteria, and then we match the results with the information reach and range. The main findings show that the web services platform can take place when the range of information access is required by anyone and anywhere regardless of IT base. EDI can take place when the range of information access doesn’t exceed the organizations’ boundaries. But when the range of information access exceeds the organizations’ boundaries, still between certain partners, web services or EDI can take place, and thus the organization can select them from those platforms depending on other criteria such as security, and cost.

The Relationship between IT and Supply Chain Performance: A Systematic Review and Future Research  [PDF]
Elnouaman Samadi, Ismail Kassou
American Journal of Industrial and Business Management (AJIBM) , 2016, DOI: 10.4236/ajibm.2016.64044
Abstract: Many firms have spent large investments in developing and implementing information technologies and systems to enhance their supply chain performance with little benefit, while others have spent similar amount of money with great success [1]. The IT productivity paradox in supply chain performance is widely cited as a polemic that needs more investigation. This work reviews the body of knowledge related to the relationship between IT and supply chain performance through a systematic literature review study, following a pre-defined search protocol that can be used by other researchers to review other subjects in the area of information technology, to provide an overview of the state of the art and identify research challenges and gaps. 33 papers are finally selected, in which three main themes of research, nineteen IT-relates characteristics, and seventeen mediator factors to enhance supply chain performance are identified. The indirect effect of IT in SCP is the major findings in the literature. This work presents some new guidelines of research.
Sero-Prevalence Study of Camel Trypanosomiasis in Selected Villages of Galkayo, Somalia  [PDF]
Abdulgani Huruse Ismail Mohamoud
Open Journal of Veterinary Medicine (OJVM) , 2017, DOI: 10.4236/ojvm.2017.74004
Abstract: A cross-sectional study was carried out aimed to estimate sero-prevalence of camel trypanosomiasis and to investigate the related risk factors of the disease in Four Selected Villages of Galkayo, Mudug region from 14th March 2016 up to 20th April 2016. Blood samples were collected from 69 randomly selected camels of the four study villages, and samples were allowed to clot at room temper to detect the sero-prevalence of trypanosome using Card Agglutination Test for Trypanosomiasis (CATT). The results indicated that the overall sero-prevalence of trypanosomiasis in camels that 15.9% (11) samples were positive for trypanosome evansi (T. evansi) was recorded. Higher infection was found in female (19.4) as compared to male (11.1), However, there is no statistically significant difference in sero-prevalence between sex categories (P > 0.05). High Test infection of sero-prevalence was noted 20% in young age (<10) followed by 19% in adult age group (>10), and there was statistically significant difference (P < 0.05) in susceptibility among age groups. These results seem to indicate that T. evansi infection is high in the study area. There is need of further control of camel trypanosomiasis through the uses of curative and prophylactic drugs to avoid the various problems.
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