9,795 research outputs found
Optimal dimensional synthesis of force feedback lower arm exoskeletons
This paper presents multi-criteria design optimization of parallel mechanism based force feedback exoskeletons for human forearm and wrist. The optimized devices are aimed to be employed as a high fidelity haptic interfaces. Multiple design objectives are discussed and classified for the devices and the optimization problem to study the trade-offs between these criteria is formulated. Dimensional syntheses are performed for optimal global kinematic and dynamic performance, utilizing a Pareto front based framework, for two spherical parallel mechanisms that satisfy the ergonomic necessities of a human forearm and wrist. Two optimized mechanisms are compared and discussed in the light of multiple design criteria. Finally, kinematic structure and dimensions of an optimal exoskeleton are decided
The Role of Social and Cultural Environment in the Determination of Faith in Islamic Theology
In Arabic the term Ä«mÄ?n is derived from the root "a-m-nâ€?, it
is in the "if"al� form and means, "to give confidence to
others�, "to be ensured�, "to confirm and to accept�. Verb
form "Ä?manaâ€? means "removal of fear and replacing it with
confidence.
In Islamic terminology the definition of Ä«mÄ?n given in
Gabriel hadith in which six principles of Ä«mÄ?n is mentioned
similarly the term Ä?mentu, which forms knowledge of
catechism, is symbolized to mean Ä«mÄ?n. This is why
definitions of Ä«mÄ?n given in many books do not state what
Ä«mÄ?n is, instead tell about what to believe in.
Generally speaking, the definition of Ä«mÄ?n is given as
follows: "Ä«mÄ?n is to confirm (approve)â€?, "Ä«mÄ?n is confirmation
in heartâ€?, "Ä«mÄ?n is the contrivance of the heartâ€?, "Ä«mÄ?n
is to confirm by heart and to confess by speechâ€?, "Ä«mÄ?n is
contrivance in heart and is confession through speech�,
"Ä«mÄ?n is confirmation of heart, confession through speech,
and performed by deedsâ€?, "Ä«mÄ?n is speech and deedsâ€?.
According to Paul Tillich, Ä«mÄ?n is a total and centered act
of the personal self, the act of unconditional, infinite and
ultimate concern. Briefly Faith is the state of being
ultimately concerned.
According to the father of all modern Protestant Theology,
Schleiermacher, Ä«mÄ?n is the feeling of unconditional
dependence. Of course, feeling so defined does not mean
in religion what it means in popular psychology. It is not
vague and changing, but has a definite content
Approximate l-State Solutions of the Klein-Gordon Equation for Modified Woods-Saxon Potential With Position Dependent Mass
The radial part of the Klein-Gordon equation for the generalized Woods-Saxon
potential is solved by using the Nikiforov-Uvarov method in the case of
spatially dependent mass within the new approximation scheme to the centrifugal
potential term. The energy eigenvalues and corresponding normalized
eigenfunctions are computed. The solutions in the case of constant mass are
also studied to check out the consistency of our new approximation scheme.Comment: 15 page
An Algebraic Method for the Analytical Solutions of the Klein-Gordon equation for any angular momentum for some diatomic potentials
Analytical solutions of the Klein-Gordon equation are obtained by reducing
the radial part of the wave equation to a standard form of a second order
differential equation. Differential equations of this standard form are
solvable in terms of hypergeometric functions and we give an algebraic
formulation for the bound state wave functions and for the energy eigenvalues.
This formulation is applied for the solutions of the Klein-Gordon equation with
some diatomic potentials.Comment: 13 page
Coherent States for PT-/Non-PT-Symmetric and Non-Hermitian Morse Potential via Path Integral Method
We discuss the coherent states for PT-/non-PT-Symmetric and non-Hermitian
generalized Morse Potential obtained by using path integral formalism over the
holomorphic coordinates. We transform the action of generalized Morse potential
into two harmonic oscillators with a new parametric time to establish the
parametric time coherent states. We calculate the energy eigenvalues and the
corresponding wave functions in parabolic coordinates.Comment: 14 page
Exact Solutions of the Morse-like Potential, Step-Up and Step-Down Operators via Laplace Transform Approach
We intend to realize the step-up and step-down operators of the potential
. It is found that these operators
satisfy the commutation relations for the SU(2) group. We find the
eigenfunctions and the eigenvalues of the potential by using the Laplace
transform approach to study the Lie algebra satisfied the ladder operators of
the potential under consideration. Our results are similar to the ones obtained
for the Morse potential ().Comment: 8 page
Modified l-states of diatomic molecules subject to central potentials plus an angle-dependent potential
We present modified -states of diatomic molecules by solving the radial
and angle-dependent parts of the Schr\"odinger equation for central potentials,
such as Morse and Kratzer, plus an exactly solvable angle-dependent potential
within the framework of the Nikiforov-Uvarov (NU)
method. We emphasize that the contribution which comes from the solution of the
Schr\"odinger equation for the angle-dependent potential modifies the usual
angular momentum quantum number . We calculate explicitly bound state
energies of a number of neutral diatomic molecules composed of a first-row
transition metal and main-group elements for both Morse and Kratzer potentials
plus an angle-dependent potential.Comment: 19 page
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