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bagher-esmaili-feijani--haleh
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Assessing ITIL Maturity to Business-IT Strategic Alignment
, M.Sc. Thesis Sharif University of Technology ; Shadrokh, Shahram (Supervisor)
Abstract
The literature suggests that organizations cannot be competitive if their business and information technology strategies are not aligned. Yet achieving strategic alignment continues to be a major concern for business executives. A number of alignment models have been offered in the literature, primary among them the Strategic Alignment model (SAM), Strategic Alignment Maturity model, and IT Governance (via ITIL). The Information Technology Infrastructure Library (ITIL) presents a comprehensive set of guidelines for defining, designing, implementing and maintaining IT Service Management processes. It provides platform that can be used to leverage complementary effects between IT and business...
Strategic alignment: ITIL perspective
, Article ICCTD 2010 - 2010 2nd International Conference on Computer Technology and Development, Proceedings, 2 November 2010 through 4 November 2010 ; November , 2010 , Pages 550-555 ; 9781424488438 (ISBN) ; Gardesh, H ; Shadrokh Sikari, S ; Sharif University of Technology
2010
Abstract
The literature suggests that organizations cannot be competitive if their business and information technology strategies are not aligned. Yet achieving strategic alignment continues to be a major concern for business executives. A number of alignment models have been offered in the literature, primary among them the Strategic Alignment model (SAM) and IT Governance (via ITIL). As there is no published research that attempts to present how effective ITIL V3 is to align business and IT in strategic level, this paper reports on determining aligning roles of ITIL by applying it to the SAM framework. In this regard, the (TIL Strategic Alignment model is proposed to describe ITIL V3 approach of...
Validating ITIL maturity to strategic business-IT alignment
, Article ICCTD 2010 - 2010 2nd International Conference on Computer Technology and Development, Proceedings, 2 November 2010 through 4 November 2010 ; November , 2010 , Pages 556-561 ; 9781424488438 (ISBN) ; Gardesh, H ; Shadrokh Sikari, S ; Sharif University of Technology
2010
Abstract
Ensuring that organizational IT is in alignment with and provides support for an organization's business strategy is critical to business success. As there is no published research that attempts to describe maturity of ITIL V3 in aligning business and IT at strategic level, this paper reports on determining aligning roles of ITIL V3 in practice. In this paper, ITIL maturity to business-IT strategic alignment is validated by Strategic Alignment Maturity model. Focusing on how ITIL V3 covers business-IT alignment maturity criteria of the model, the maturity of ITIL strategic alignment practices is assessed which makes it possible to recognize conceptual and practical competencies of ITIL to...
Strategic alignment: ITIL perspective
, Article Proceedings of the International Conference on Electronic Business (ICEB), 1 December 2010 through 4 December 2010, Shanghai ; 2010 , Pages 457-462 ; 16830040 (ISSN) ; Gardesh, H ; Shadrokh Sikari, S ; Sharif University of Technology
2010
Abstract
The literature suggests that organizations cannot be competitive if their business and information technology strategies are not aligned. Yet achieving strategic alignment continues to be a major concern for business executives. A number of alignment models have been offered in the literature, primary among them the Strategic Alignment model (SAM) and IT Governance (via ITIL). As there is no published research that attempts to present how effective ITIL V3 is to align business and IT in strategic level, this paper reports on determining aligning roles of ITIL by applying it to the SAM framework. In this regard, the ITIL Strategic Alignment model is proposed to describe ITIL V3 approach of...
Pseudo-dirac neutrino scenario: Cosmic neutrinos at neutrino telescopes
, Article Physical Review D - Particles, Fields, Gravitation and Cosmology ; Volume 81, Issue 1 , 2010 ; 15507998 (ISSN) ; Sharif University of Technology
2010
Abstract
Within the "pseudo-Dirac" scenario for massive neutrinos the existence of sterile neutrinos which are almost degenerate in mass with the active ones is hypothesized. The presence of these sterile neutrinos can affect the flavor composition of cosmic neutrinos arriving at Earth after traveling large distances from astrophysical objects. We examine the prospects of neutrino telescopes such as IceCube to probe the very tiny mass squared differences 10-12eV2>Δm2>10-19eV2, by analyzing the ratio of μ-track events to showerlike events. Considering various sources of uncertainties which enter this analysis, we examine the capability of neutrino telescopes to verify the validity of the pseudo-Dirac...
Cosmic neutrinos at IceCube: θ13, δ and initial flavor composition
, Article Journal of Physics: Conference Series ; Volume 203 , 2010 ; 17426588 (ISSN) ; Sharif University of Technology
2010
Abstract
We discuss the prospect of extracting the values of the mixing parameters δ and θ13 through the detection of cosmic neutrinos in the planned and forthcoming neutrino telescopes. We take the ratio of the μ-track to shower-like events, R, as the realistic quantity that can be measured in the neutrino telescopes. We take into account several sources of uncertainties that enter the analysis. We then examine to what extent the deviation of the initial flavor composition from we : w μ : wτ 1 : 2 : 0 can be tested
Oscillation of neutrinos produced by the annihilation of dark matter inside the Sun
, Article Physical Review D - Particles, Fields, Gravitation and Cosmology ; Volume 81, Issue 11 , June , 2010 ; 15507998 (ISSN) ; Farzan, Y ; Sharif University of Technology
2010
Abstract
The annihilation of dark matter particles captured by the Sun can lead to a neutrino flux observable in neutrino detectors. Considering the fact that these dark matter particles are nonrelativistic, if a pair of dark matter annihilates to a neutrino pair, the spectrum of neutrinos will be monochromatic. We show that in this case, even after averaging over the production point inside the Sun, the oscillatory terms of the oscillation probability do not average to zero. This leads to interesting observable features in the annual variation of the number of muon track events. We show that smearing of the spectrum due to thermal distribution of dark matter inside the Sun is too small to wash out...
A new class of invariants in the lepton sector
, Article Nuclear Physics B ; Volume 811, Issue 1-2 , 2009 , Pages 98-108 ; 05503213 (ISSN) ; Farzan, Y ; Sharif University of Technology
2009
Abstract
We construct a new set of combinations from the mass matrices of the charged leptons and neutrinos that are invariant under basis transformation, hereafter the invariants. We use these invariants to study various symmetries and neutrino mass textures in a basis independent way. In particular, we show that by using these invariants the ansatz such as μ - τ exchange and reflection symmetries, various texture zeros and flavor symmetries can be expressed in a general basis. © 2008 Elsevier B.V. All rights reserved
An analysis of cosmic neutrinos: flavor composition at source and neutrino mixing parameters
, Article Nuclear Physics B ; Volume 821, Issue 1-2 , 2009 , Pages 197-214 ; 05503213 (ISSN) ; Farzan, Y ; Sharif University of Technology
2009
Abstract
We examine the feasibility of deriving neutrino mixing parameters δ and θ13 from the cosmic neutrino flavor composition under the assumption that the flavor ratios of the cosmic neutrinos at the source were Fνe + Fover(ν, ̄)e : Fνμ + Fover(ν, ̄)μ : Fντ + Fover(ν, ̄)τ = 1 : 2 : 0. We analyze various uncertainties that enter the derivation of δ and θ13 from the ratio of the shower-like to μ-tracks events which is the only realistic source of information on the flavor composition at neutrino telescopes such as ICECUBE. We then examine to what extent the deviation of the initial flavor ratio from 1 : 2 : 0 can be tested by measurement of this ratio at neutrino telescopes taking into account...
Analytical and Numerical Study of Dynamics of Wettability Driven Droplets in Smooth And Corrugated Channels
, M.Sc. Thesis Sharif University of Technology ; Moosavi, Ali (Supervisor)
Abstract
We studied dynamics of droplets inside channels under surface forces created by chemicalsteps on the channel walls. A multi-component Shan-Chen lattice Boltzmann method isused for this purpose.The effects of parameters such as the channel height, viscosity anddensity ratios on the results were investigated for homogeneous and grooved substrates. Alsoan analytical solution was developed for droplets under chemical heterogeneities in channels with smooth surfaces. The solution considers a general condition, namely, asymmetry of the contact angles on the top and bottom walls, the viscosity of the gas as the second fluid and the effect of the channel height. Then using Shan-Chen lattice...
Existence and Uniqueness of Solution for Two Free Boundary Problems Modelling Tumor Growth
,
M.Sc. Thesis
Sharif University of Technology
;
Hesaaraki, Mahmoud
(Supervisor)
Abstract
This thesis is based on articles [18,15]. Zhao [18] has studied a free boundary problem modeling the growth of tumors with drug application. In this model live cells are two kindes: proliferative cells and quiescent cells. This model consists of two nonlinear second-order parabolic equations describing the diffusion of nutrient and drug concentration, and three nonlinear first-order hyperbolic equations describing the evolution of proliferative cells, quiescent cells and dead cells. He has proved that this free boundary problem has a unique global solution. Tao and Chen [15] have studied another free boundary problem modelling the growth of an avascular tumour with drug application. The...
Bi-objective optimization of a job shop with two types of failures for the operating machines that use automated guided vehicles
, Article Reliability Engineering and System Safety ; Volume 175 , July , 2018 , Pages 92-104 ; 09518320 (ISSN) ; Akhavan Niaki, S. T ; Haleh, H ; Naderi, B ; Sharif University of Technology
Elsevier Ltd
2018
Abstract
Reliability of machinery and equipment in flexible manufacturing systems are among the most important issues to reduce production costs and to increase efficiency. This paper investigates the reliability of machinery in job shop production systems, where materials, parts, and other production needs are handled by automated guided vehicles (AGV). The failures time of the parallel machines in a given shop follow either an exponential or a Weibull distribution. As there is no closed-form equation to calculate the reliability of the shop in the Weibull case, a simulation approach is taken in this paper to estimate the reliability. Then, a bi-objective nonlinear optimization model is developed...
Reliability optimization of tools with increasing failure rates in a flexible manufacturing system
, Article Arabian Journal for Science and Engineering ; Volume 44, Issue 3 , 2019 , Pages 2579-2596 ; 2193567X (ISSN) ; Akhavan Niaki, S. T ; Haleh, H ; Naderi, B ; Sharif University of Technology
Springer Verlag
2019
Abstract
Tool reliability is one of the most important issues in a flexible manufacturing system. If a tool fails to operate correctly, the performance of the manufacturing system is reduced, the due date may be violated, or the product quality falls behind the standards. This paper develops a bi-objective mathematical model for tool selection in a flexible manufacturing system in order to optimize both reliability and cost. The tools in these environments are considered to have increasing failure rates as they are used over time; a case closer to reality. This paper aims to evaluate the availability of different tools used in a production system, in which the reliability of a tool is dependent on...
Design and Implementation of an Internet-Based Survey on Route Choice Characteristics
, M.Sc. Thesis Sharif University of Technology ; Zokaei Aashtiani, Hedayat (Supervisor)
Abstract
It is assumed in many traffic assignment models that people choose their path based on shortest travel time. Few empirical studies of revealed route characteristics have been reported in the literature. In this study, first, an innovative internet-based survey using Google map has been designed and implemented. The sample includes the people who commute to Sharif University of Technology in the morning peak hours. Next, observed routes in 134 valid questionnaires have been analyzed by using Tehran network database and VBA programming. Besides the length and travel time of each path, other characteristics of the observed route such as the number of right, left, and U-turns, number of...
A categorization scheme for semantic web search engines
, Article IEEE International Conference on Computer Systems and Applications, 2006, Sharjah, 8 March 2006 through 8 March 2006 ; Volume 2006 , 2006 , Pages 171-178 ; 1424402123 (ISBN); 9781424402120 (ISBN) ; Abolhassani, H ; Sharif University of Technology
IEEE Computer Society
2006
Abstract
Semantic web search engines are evolving and many prototype systems and some implementation have been developed. However, there are some different views on what a semantic search engine should do. In this paper, a categorization scheme for semantic web search engines are introduced and elaborated. For each category, its components are described according to a proposed general architecture and various approaches employed in these components are discussed. We also propose some factors to evaluate systems in each category. © 2006 IEEE
The dynamics of wettability driven droplets in smooth and corrugated microchannels
, Article Journal of Statistical Mechanics: Theory and Experiment ; Volume 2012, Issue 10 , 2012 ; 17425468 (ISSN) ; Moosavi, A ; Mazloomi, A ; Sharif University of Technology
IOP
2012
Abstract
A multi-component lattice Boltzmann scheme is used to investigate the dynamics of a wettability driven droplet within a microchannel. The driving force for the motion is created by a stepwise change in the wettability of the channel walls. Moreover, an analytical solution is developed for evaluation of the dynamics of the droplet inside the channel. The effects of various parameters such as the height of the channel, the wetting pattern of the channel walls, the viscosity and the density ratio on the dynamics are studied. Also, the effect of grooves of different sizes on the channel surfaces on the dynamics of the droplet is investigated for both hydrophilic and hydrophobic surfaces....
Gravity-driven thin liquid films over topographical substrates
, Article European Physical Journal E ; Volume 36, Issue 6 , 2013 ; 12928941 (ISSN) ; Moosavi, A ; Esmaili, E ; Sharif University of Technology
2013
Abstract
We investigate the time-dependent evolution of thin liquid films over inclined substrates using a multi-component lattice Boltzmann algorithm. Substrates with and without grooves are considered and the effects of the inclination angle on the dynamics and the coating of the substrates are studied. Our results indicate that the dynamics is enhanced and the ridge height and its displacement are increased by increasing the inclination angle. However, by increasing the inclination angle the maximum depth that can be successfully coated is reduced. Also, although for any given groove depth the width should be larger than a critical value for successful coating, the critical width decreases for...
Nonlinear cuffless blood pressure estimation of healthy subjects using pulse transit time and arrival time
, Article IEEE Transactions on Instrumentation and Measurement ; Volume 66, Issue 12 , 2017 , Pages 3299-3308 ; 00189456 (ISSN) ; Kachuee, M ; Shabany, M ; Sharif University of Technology
2017
Abstract
This paper presents a novel blood pressure (BP) estimation method based on pulse transit time (PTT) and pulse arrival time (PAT) to estimate the systolic BP (SBP) and the diastolic BP (DBP). A data acquisition hardware is designed for high-resolution sampling of phonocardiogram (PCG), photoplethysmogram, and electrocardiogram (ECG). PCG and ECG perform as the proximal timing reference to obtain PTT and PAT indices, respectively. In order to derive a BP estimator model, a calibration procedure, including a supervised physical exercise, is conducted for each individual, which causes changes in their BP, and then, a number of reference BPs are measured alongside the acquisition of the signals...
Cosmic Neutrinos at Neutrino Telescopes CP-violation, Source Properties and Beyond the Standard Model Physics
, Ph.D. Dissertation Sharif University of Technology ; Farzan, Yasaman (Supervisor)
Abstract
In this thesis, we studied the oscillation of neutrino flavors and the measurement of mixing parameters through the detection of cosmic neutrinos at neutrino telescopes. Most of the astrophysical explosions predict the emission of neutrino flux and kilometer-scale detectors are under construction for the observation of these neutrinos. Detection of astrophysical neutrinos opens a new window to understand the neutrino properties and also the properties of astrophysical sources.In this thesis first we review the phenomenology of neutrino flavor oscillation and characteristics of neutrino mass matrix. By introducing a new class of invariants (under general transformation of lepton fields bases)...
Non-invasive blood pressure estimation using phonocardiogram
, Article Proceedings - IEEE International Symposium on Circuits and Systems, 28 May 2017 through 31 May 2017 ; 2017 ; 02714310 (ISSN) ; 9781467368520 (ISBN) ; Kachuee, M ; Shabany, M ; Sharif University of Technology
2017
Abstract
This paper presents a novel approach based on pulse transit time (PTT) for the estimation of blood pressure (BP). In order to achieve this goal, a data acquisition hardware is designed for high-resolution sampling of phonocardiogram (PCG) and photoplethysmogram (PPG). These two signals can derive PTT values. Meanwhile, a force-sensing resistor (FSR) is placed under the cuff of the BP reference device to mark the moments of measurements accurately via recording instantaneous cuff pressure. For deriving the PTT-BP models, a calibration procedure including a supervised physical exercise is conducted for each individual. The proposed method is evaluated on 24 subjects. The final results prove...