We show that the Dirichlet to Neumann map for the equation ∇·σ∇u = 0 in a two-dimensional domain uniquely determines the bounded measurable conductivity σ. This gives a positive answer to a question of A. P. Calder´n o from 1980. Earlier the result has been shown only for conductivities that are suﬃciently smooth. In higher dimensions the problem remains open. Contents Introduction and outline of the method
The process of financial reporting, financial statement analysis, and valuation is intended
to help investors and analysts to deeply understand a firm’s profitability and risk and to use
that information to forecast future profitability and risk and ultimately value the firm,
enabling intelligent investment decisions. This process lies at the heart of the role of
accounting, financial reporting, capital markets, investments, portfolio management, and
corporate management in the world economy.
The process of financial reporting, financial statement analysis, and valuation is intended to help investors and analysts to deeply understand a firm’s profitability and risk and to use that information to forecast future profitability and risk and ultimately value the firm, enabling intelligent investment decisions. This process lies at the heart of the role of accounting, financial reporting, capital markets, investments, portfolio management, and corporate management in the world economy.
Textbooks on radio antennas and propagation have changed little
over the last 50 years. Invariably they base themselves on the
famous electromagnetic equations described by James Clerk Max-
well, a great nineteenth-century genius of theoretical physics
(Torrance, 1982). Maxwell's equations brilliantly encompassed all
the electromagnetic phenomena known by his time (except photo-
electric long-wave cut-off, which remained ...
Energy is defined as the capacity of a substance to do work. It is a property of the substance and
it can be transferred by interaction of a system and its surroundings. The student would have
encountered these interactions during the study of Thermodynamics. However, Thermodynamics
deals with the end states of the processes and provides no information on the physical
mechanisms that caused the process to take place. Heat Transfer is an example of such a process.
A convenient definition of heat transfer is energy in transition due to temperature differences.
In the first edition of this book, I claimed that humanity could be divided into three
groups: (1) those who conduct their own research studies, (2) those who do not formally
engage in the research process but nonetheless encounter the results of others’
investigations, and (3) those who are neither “makers” nor “consumers” of research
claims. Now, nearly 40 years since I made that statement, I still believe that every
person on the face of the Earth can be classified into one of those three groups.
This book is concerned with Ultra-Low-Frequency (ULF)-electromagnetic
waves observed on the Earth and in Space. These are so-called geomagnetic
variations or pulsations. Alfv´en’s discovery related to the influence of the
strong magnetic field on the conducting fluids (magnetohydrodynamics) led
to development of the concept that the ULF-waves are magnetospheric magnetohydrodynamic
MHD-waves at their propagation gather information about the magnetosphere,
ionosphere, and the ground. There are two applied aspects based on
using the ULF electromagnetic oscillations.
Superposition, Thévenin and Norton
6.002 Fall 2000
Circuit Analysis Methods
KVL: ∑Vi = 0
KCL: ∑ Ii = 0
Circuit composition rules Node method – the workhorse of 6.002 KCL at nodes using V ’s referenced from ground (KVL implicit in “ (ei − e j ) G ”)
6.002 Fall 2000
Write node equations –
e −V e + −I =0 R1 R2
Notice: linear in e,V , I No eV ,VI terms
6.002 Fall 2000
This book is based on recent research work conducted by the authors dealing with the design
and development of active and passive microwave components, integrated circuits and
systems. It is divided into seven parts. In the first part comprising the first two chapters,
alternative concepts and equations for multiport network analysis and characterization are
provided. A thru-only de-embedding technique for accurate on-wafer characterization is
In this paper we improve an earlier result by Bukhgeim and Uhlmann , by showing that in dimension n ≥ 3, the knowledge of the Cauchy data for the Schr¨dinger equation measured on possibly very small subsets of the o boundary determines uniquely the potential. We follow the general strategy of  but use a richer set of solutions to the Dirichlet problem. This implies a similar result for the problem of Electrical Impedance Tomography which consists in determining the conductivity of a body by making voltage and current measurements at the boundary. ...
Allahyari et al. Nanoscale Research Letters 2011, 6:360 http://www.nanoscalereslett.com/content/6/1/360
Conjugate heat transfer of laminar mixed convection of a nanofluid through an inclined tube with circumferentially non-uniform heating
Shahriar Allahyari1, Amin Behzadmehr1* and Seyed Masoud Hosseini Sarvari2
Abstract Laminar mixed convection of a nanofluid consisting of water and Al2O3 in an inclined tube with heating at the top half surface of a copper tube has been studied numerically.
In line with the importance of establishing or disproving the income-environment
relationship in Asia, this paper will conduct a regression analysis of three air pollutants (PM-
10, SO2, and NO2) on per capita income through the Environmental Kuznets Curve (EKC)
equation. The regression will be made for a panel data of seven Asian countries observed for
a period of eight years. The contribution of this paper is the creation of a scientific
relationship between income and pollution backed by empirical data.
A mathemalical model is presented that describes heat and moisture transfer during the holpressing of MDF. The model includes conduction of heat between the press platens and the central layer of the mattress, phase change of water from the adsorbed to the vapor state and the convective heat and mass transfer through the edges of the mattress. This approach results in a three-dimensional unsleady-state problem in which the properties of the wood fibers, water and the wood-water system are dependent on temperature, mattress moisture content and steam pressure.
When you complete this chapter you should be able to: Describe the characteristics of arrivals, waiting lines, and service systems; apply the single-channel queuing model equations; conduct a cost analysis for a waiting line; apply the multiple-channel queuing model formulas; apply the constant-service-time model equations; perform a limited-population model analysis.