540 research outputs found
A Role of Fractional Dimension in Study Physics
We study physics from a fractional dimensional perspective. It is considered
that the whole space is not only integer dimensions but also a superposition of
spaces between integer dimensions. Space-filling between integer dimensions
makes a fractional dimensional space. This happens through a rotation of the
integer dimension by the fractional derivative operator (local part) to sweep
all spaces between two integer dimensions. Then, we introduce four axioms which
they can help us to build a mathematical framework for study physics from
fractional dimension point of view. Afterward, three scenarios such as static,
linear and quadratic trajectories are demonstrated. Where moving with linear or
quadratic trajectories in fractional dimensional space corresponds to an
inertial framework or accelerated system in physics, respectively. Also from
this opinion, it is realized that the coupling of space and time (space-time)
happens through the dimension with an interconnection role where we call it
space-dimension-time. Finally, the wave equation is derived from fractional
dimensional point of view with a linear trajectory in fractional dimensional
space. And the behavior of electromagnetic wave in lossless and lossy mediums,
Doppler effect and gravitational red (blue)-shift are also demonstrated from
fractional dimensional aspect
Understanding the Politics of Refugee Law and Policy Making: Interdisciplinary and Empirical Approaches
In this article, we argue that building a stronger empirical understanding of the politics of domestic refugee law and policy making is essential for refugee law scholars to better advocate for protection-orientated reforms. While much of the legal scholarship is aimed at promoting policy change, the best way to achieve this goal has rarely been examined. We identify three key areas of interdisciplinary empirical research that can create a stronger evidence-base for improving domestic policy reform efforts. This includes understanding the institutions and actors involved in policy formulation, measuring the impact of refugee laws and policies in practice, and identifying how to influence public opinion and build support for progressive law and policy change. We showcase existing interdisciplinary research in each of these areas, and highlight topics ripe for further empirical inquiry
CIVIL RESPONSIBILITY OF MAINTENANCE AND TRANSPORTATION ORGANIZATION AGAINST DAMAGES DUE TO ROAD DEFECTS IN IRAN’ LAW
Abstract. Maintenance organization is to maintain, establish, keep and securitization of roads. In the eventwhen defects of road or lacking observation of safety principles are effective in accidents, their responsibility shall be based on patterns of civil responsibility and special laws for establishing and their responsibility. Civil responsibility for the custodians is discussed from two points, in one side, it is based on patterns of civil responsibility and fault theory and in other side, since road custodians are governmental and public institutes generally, and the analysis was performed in terms of civil responsibility of government. This research methodology is analytic-descriptive and the collection of data is as librarian. The results of this study show that the failure of maintenance and transportation organization and lacking observation of defect and inattention to securitization can result to mortal accidents andtolerate high costs on people and government and caused situations in which people or organizations are regarded as responsible to remove defects and control and prevent from accidents in roads.Key words: Civil Responsibility, Transportation, Road Protectors, Road Defect, Fault
CIVIL RESPONSIBILITY OF MAINTENANCE AND TRANSPORTATION ORGANIZATION AGAINST DAMAGES DUE TO ROAD DEFECTS IN IRAN’ LAW
Abstract. Maintenance organization is to maintain, establish, keep and securitization of roads. In the eventwhen defects of road or lacking observation of safety principles are effective in accidents, their responsibility shall be based on patterns of civil responsibility and special laws for establishing and their responsibility. Civil responsibility for the custodians is discussed from two points, in one side, it is based on patterns of civil responsibility and fault theory and in other side, since road custodians are governmental and public institutes generally, and the analysis was performed in terms of civil responsibility of government. This research methodology is analytic-descriptive and the collection of data is as librarian. The results of this study show that the failure of maintenance and transportation organization and lacking observation of defect and inattention to securitization can result to mortal accidents andtolerate high costs on people and government and caused situations in which people or organizations are regarded as responsible to remove defects and control and prevent from accidents in roads.Key words: Civil Responsibility, Transportation, Road Protectors, Road Defect, Fault
Reactions of some grape cultivars to Dematophora necatrix
White root rot of grape caused by Dematophora necatrix is prevalent in Jahrom and Mimand of Fars province, Iran. In a greenhouse tests 30 gr of colonized wheat kernels per 1,200 g soil amended with peat moss were used to inoculate rooted cuttings of 29 Vitis vinifera and one hybrid cultivar in the pots. After 150 days most cuttings belonging to 27 V. vinifera cultivars and the hybrid died and were evaluated susceptible. However, 9 seedlings from 'Bidaneh Sephid Gazvin' and 3 from 'Bidaneh Ghermez Gazvin' remained alive. Roots of these cuttings were totally free from mycelium and looked healthy. The seedlings were transplanted after root disinfection with benomyl, in soil near Zarghan Vineyard Collection for further studies
A Theoretical Framework for Electromechanically Reinforced Brillouin Scattering in Integrated Photonic Waveguides
Current theoretical demonstration of the Stimulated Brillouin scattering
(SBS) in waveguides composed of centrosymmetric materials does not capture
physics of the phenomenon in waveguides composed of non-centrosymmetric
materials. The SBS in the latter problem, entails mutual coupling of the
electric and acoustic waves due to piezoelectricity, and ends up to a different
power conversion equation than that in a centrosymmetric material. In this
study, we theoretically investigate Brillouin scattering in chip-scale
waveguides with non-centrosymmetric material when excited by an
Inter-Digital-Transducer. We explain how Brillouin scattering is formulated in
the presence of externally injected acoustic waves. Also we demonstrate the
effect of this external signal on reinforcing Stimulated Brillouin scattering.
As a case study we study SBS in a gallium arsenide nonowire. It is shown that
the Stokes amplification due to electromechanically reinforced SBS in this
waveguide can grow several orders of magnitude higher than the values reported
for the SBS in a silicon nanowire; This enables reducing the waveguide length
required for a given Stokes amplification from centimeters to few hundred
micrometers
A two-level Product Recommender for E-commerce Sites by Using Sequential Pattern Analysis
With the development of communication networks and rapid growth of their applications, huge amount of information have been produced. Major part of these information are in electronic stores, and hence it's really hard to find desired products inside huggermugger. Product Recommendation System (PRS) tries to solve this problem by giving appropriate and fast recommendations to the customers. This paper proposes a two-level product recommender for E-commerce sites. At first, the available products are clustered by using C-Means algorithm to create groups of products with similar characteristics. Then, the second level considers the customers’ behavior and their purchase history for drawing the relationships between products by using Sequential Pattern Analysis (SPA) method. These relationships, eventually, will lead to appropriate recommendation for customers and also increases the likelihood of selling related products in electronic transactions. Extensive numerical simulations over UCI transactions 10k dataset indicates that 87% of records in mined sequential patterns are predicted correctly and the accuracy of recommendations is more than other RPSs
On optimization and solution of roots of a function using Taylor's expansion and fractional derivatives
A method is given for finding roots of a one-variable function using Taylor's
expansion of that function and fractional derivative calculated at a suitable
tangent point without using Newton's method. Several examples regarding
polynomials are stated for making the method clearly. Then, the given method is
generalized to functions of several variables belonging to an -dimensional
space. The given method can be much more rapidly than the Newton's one since
finding a suitable point on the function, the number of iterations becomes much
less than Newton's iterative steps. The methods given in this paper can be used
for optimization of function via fractional derivatives of order .Comment: 15 pages, 1 figur
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