271 research outputs found
CM Values of Green Functions Associated to Special Cycles on Shimura Varieties with Applications to Siegel 3-Fold
We generalize the definition of CM cycles beyond the small and big CM ones
studied by various authors and give a uniform formula for the CM values of
Green functions associated to these special cycles in general using the idea of
regularized theta lifts. Finally, as an application to Siegel 3-fold ,
we can compute special values of theta functions and Rosenhain
-invariants at a CM cycle, which is useful for genus two curve
cryptography.Comment: arXiv admin note: text overlap with arXiv:1008.1669 by other author
Collinear and Transverse Momentum Dependent parton densities obtained with a Parton Branching Method
We present a solution of the DGLAP evolution equations, written in terms of
Sudakov form factors to describe the branching and no-branching probabilities,
using a parton branching Monte Carlo method. We demonstrate numerically that
this method reproduces the semi-analytical solutions. We show how this method
can be used to determine Transverse Momentum Dependent (TMD) parton
distribution functions, in addition to the usual integrated parton
distributions functions. We discuss numerical effects of the boundary of soft
gluon resolution scale parameter on the resulting parton distribution
functions. We show that a very good fit of the integrated TMDs to high
precision HERA data can be obtained over a large range in x and Q^2
POLITICAL ASSESSMENT OF QATARI CRISIS ON THE GCC SECURITY
Through investigating the conception of the Gulf Cooperation Council (GCC) member states, it is obvious that the unity is the main factor that ensured the stability and security of the state members. Due to some political concerns, the Kingdom of Saudi Arabia (KSA), United Arab Emirates (UAE) and State of Bahrain launched boycott policies against the State of Qatar. Accordingly, Qatar has increased its alliance with Turkey and Iran to ensure its national security. The focal aims of this thesis are to explore the consequences of the Qatari Crisis on social, economic, political and mainly on the security sides. Moreover, identifying the key sources of friction between Qatar and the blockading states and how other factors, both historical and contextual have contribute and shaped these differences to the point that the states were willing to engage in such dramatic moves against each other. To achieve these objectives, the study applied qualitative method. A semi-structured questionnaire was used to conduct elite interviews. A semi-structured interview was developed by the researcher for collecting the required data. The interviews focused on the three main political levels which are the strategic, supervisory and executive level. The research provides important solutions for the states in the Gulf region and how to go about their diplomatic and political maneuvers given the significant risks that may be involved. This research used the Theory of Alliance to explore the attitude of the gulf countries along with the situations held on the blockade. The findings revealed that the root causes of the Qatari Crisis are multi-dimensional and include historical, political, economic factors and the media
INTEGRATING NANOTECHNOLOGY CONCEPTS AND ITS APPLICATIONS INTO THE SECONDARY STAGE PHYSICS CURRICULUM IN EGYPT
Nanotechnology is very important in our society. Its concepts pertaining to study the unique characteristics of nano-scale material, which, in turn, helps in producing new materials that can be used in the fields of medicine, industry, engineering, agriculture, drugs, communications, defense, space, among others (Ban & Kocijancic, 2011). In response to the lack of these concepts in the Egyptian secondary school Physics curriculum, the current study aim at integrating some Nanotechnology concepts and applications in this curriculum and seek to answer this question: What “nanotechnology concepts and applications” should be teach in the secondary school Physics curriculum in Egypt. To do that, the researchers analyzed the content of Physics curricula in some countries and in the three grades of secondary education in Egypt for the school year 2014-2015, and prepared a list of 52 nanotechnology concepts, to be integrated in the secondary-stage Physics curriculum. These concepts were distributed along five basic units (the first unit included 20 concepts, the second unit 11 concepts, the third and fourth units 8 concepts each, and the fifth unit 5 concepts). On the other hand, twenty one concepts of nanotechnology were integrated into the second-grade secondary school Physics curriculum, distributed along three units (Units one and two included nine concepts whereas unit three included three concepts). Regarding the third grade secondary stage Physics curriculum, 17 nanotechnology concepts were integrated and distributed along three units (the first unit included 3 concepts, the second unit 7 concepts, and the third unit 8 concepts)
A systematic analysis on the readiness of Blockchain integration in IoT forensics
Internet of Things (IoT) devices are massively utilized in our daily lives which is exposing them to a wide range of attacks. The heterogeneity of evidence produced by IoT devices is complicating the process of evidence collection and processing. Consequently, it is imperative to maintain admissible evidence collection, preservation, and analysis to be presented in a court of law. The currently used digital forensic tools and methodologies are lagging behind the IoT\u27s heterogeneity and distributive nature. The decentralized, distributed, and transparent nature of Blockchain has encouraged lots of research on utilizing Blockchain to store, process, and investigate digital evidence in IoT forensics across various jurisdictions. Therefore, this research work analyzes proposed frameworks in the literature to review their deployment of Blockchain technology to resolve the various presented challenges in IoT Forensics. It presents a systematic review to investigate the readiness of blockchain integration in IoT forensics. Many factors have been addressed to consider when integrating the Blockchain technology into IoT forensics such as data integrity, distributed storage, authentication, transparency, and security where the literature provides an adequate proof on the crucial need to consider them as essential IoT forensic readiness factors. The research findings highlight challenges and open research opportunities of blockchain utilization to facilitate sound and efficient IoT forensics
Analisis Dampak Kesalahan Dalam Simulasi Manajemen Elektronik Mesin Pada Pengoperasian Kendaraan Bermotor
For internal combustion engine electrical management in order for an engine to function properly, all its electronic components must function and play their role. Failure of these electronic components may result in improper preparation of the fuel mixture. This also affects driving safety. The impact of individual errors can have a negative impact on traffic safety and can also have a negative impact on other participants. The subject of this study was to investigate the impact of failure of electronic components on selected operating characteristics. This article is to determine the failure rate of electronic mechanical components and can affect the operation of road vehicles. Eight electronic system faults are simulated with specific vehicles and use fuel assemblies in gasoline fuel. Measurements were made based on laboratory conditions that gave to change the characteristics of the vehicle handling between damage and corruption. Making the vehicle power parameters and the selected exhaust emission components are determined for the selected vehicle characteristics. The results show that the engine failure of the electronic system has a great impact on the operating characteristics, and at the same time there are situations in the normal operating state of the vehicle in which some of these defects are unknown to the vehicle operator ricefield. The results of the publication can be used in the fields of written law, production and operation of road vehicles, and mathematical modeling of gas emission production from road transportation
Assessing Occupational Exposure to Surface Contaminants in Kuwaiti Educational Buildings
The prevalence of surface contaminants, such as potentially harmful bacteria, within building environments in the State of Kuwait is not known.To the authors’ knowledge, this article is the frst of such a report. A total of 342 stool samples were collected from 46 secondary schools to evaluate indoor occurrences of E. coli bacteria within selected lavatory surfaces. After microbiological testing, the results for the spread of the E. coli bacteria were categorized by total count, sampling location dependency, contamination level comparison between genders, and lavatory fxtures (i.e. seat and squat toilets). The results revealed that 7 schools have a bacterial contamination problem, there is cross-contamination between surfaces in the lavatory stalls, the boys’ lavatories were less sanitary than the girls’, and that the squat-style toilets are more contaminated than the seat-style. The results suggest that there is signifcant risk of spread of bacterial infection among students via contaminated hands and surfaces in the lavatory area in some schools. Thus, this study emphasizes the need to improve environmental hygiene and enhanced sanitation in these schools. In addition, conclusions can be drawn as to the effectiveness of the janitorial staff employed by the schools and the effcacy of the cleaning regime used in the lavatories. Furthermore, based on the fndings, there are architectural design consequences as squat-style toilets might be excluded in lavatories designed for schools to be constructed in the future
The leakage current components as a diagnostic tool to estimate contamination level on high voltage insulators
The current paper presents an alternative and innovative technique to predict the severity of pollution of high voltage insulator using a higher harmonics component with up to the 7th component of leakage current. The leakage current was measured using a current transformer and a shunt resistor. Next, laboratory tests were conducted on glass and porcelain insulators with artificial pollution under salt-fog pollution state which is further represented by three levels, namely light, medium, and high contamination. In this case, the formulation of a new severity of harmonic index refers to a ratio of the sum of 5th and 7th to the 3rd harmonic component. More importantly, the new index managed to provide more accurate results when used as a diagnostic tool for the levels of pollution, compared to the ratio of the total harmonic distortion (THD) to the number of odd harmonics components (n) as the boundaries. In this case, the insulators were found to be in a clean and normal condition when the K(5+7)/3 value was greater than 3%. Contrastingly, the insulators were in an extreme condition when the K(5+7)/3 was lower than 3%. Nevertheless, there is a high probability of a flashover in glass and porcelain insulators if the K(5+7)/3 value is less than 2%. The present study shows the possibility of utilizing the value of strange harmonics up to the 7th component of leakage current as the parameter for the monitoring of leakage current in overhead insulators in the presence of contamination. Overall, it can be concluded that the 3rd, 5th, and 7th harmonics details extracted from the leakage current act as a good indicator for the level of contamination
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