Results 21 to 30 of about 64,913 (266)

Interpolation of SUSY quantum mechanics [PDF]

open access: yes, 2007
Interpolation of two adjacent Hamiltonians in SUSY quantum mechanics $H_s=(1-s)A^{\dagger}A + sAA^{\dagger}$, $0\le s\le 1$ is discussed together with related operators.
Andrews G E   +7 more
core   +6 more sources

On the Weapons Used by Sarmatians in Close Combats

open access: yesВестник Волгоградского государственного университета. Серия 4. История, регионоведение, международные отношения, 2018
The Sarmatians used swords, bows and arrows, spears, darts in combats. A rider dropped from a horse, or a simple warrior, could protect themselves from the enemy by a fighting knife, ax, mace or a battle-flail. These weapons are discovered in the burials
Vladislav I. Mamontov
doaj   +1 more source

An improved sufficient condition for absence of limit cycles in digital filters [PDF]

open access: yes, 1987
It is known that if the state transition matrix A of a digital filter structure is such that D - A^{dagger}DA is positive definite for some diagonal matrix D of positive elements, then all zero-input limit cycles can be suppressed.
Liu, V., Vaidyanathan, P. P.
core   +1 more source

The dynamics of holomorphic correspondences of P^1: invariant measures and the normality set [PDF]

open access: yes, 2016
This paper is motivated by Brolin's theorem. The phenomenon we wish to demonstrate is as follows: if $F$ is a holomorphic correspondence on $\mathbb{P}^1$, then (under certain conditions) $F$ admits a measure $\mu_F$ such that, for any point $z$ drawn ...
Bharali, Gautam, Sridharan, Shrihari
core   +1 more source

Ancestors of the Minoan sword: Early Minoan IB long daggers from Hagia Photia, Crete

open access: yesUISPP Journal, 2023
The long sword, a weapon first known in the Aegean Bronze Age from Middle Minoan Crete (early second millennium BC), represented the culmination of a long period of development.
Costis Davaras   +3 more
doaj   +1 more source

ОРУЖИЕ САКСКОЙ ЭЛИТЫ: РЕКОНСТРУКЦИЯ ДЕКОРИРОВАННОГО КИНЖАЛА МЕТОДОМ ЭКСПЕРИМЕНТАЛЬНОГО МОДЕЛИРОВАНИЯ [PDF]

open access: yesМатериалы по археологии и истории античного и средневекового Причерноморья
Сложные литые изделия из бронзы и железа, столь характерные для раннего железного века Евразийской степи, как правило, связывают с применением литья по восковой модели. В статье предложена альтернативная гипотеза о возможном изготовлении таких предметов.
Чотбаев, А.Е.   +1 more
doaj   +1 more source

Bargmann representations for deformed harmonic oscillators

open access: yes, 1997
Generalizing the case of the usual harmonic oscillator, we look for Bargmann representations corresponding to deformed harmonic oscillators. Deformed harmonic oscillator algebras are generated by four operators $a, a^\dagger, N$ and the unity 1 such as $[
Guy Rideau   +4 more
core   +2 more sources

Reply on `comment on our paper `Single two-level ion in an anharmonic-oscillator trap: Time evolution of the Q function and population inversion '' [PDF]

open access: yes, 1999
We show here that the model Hamiltonian used in our paper for ion vibrating in a q-analog harmonic oscillator trap and interacting with a classical single-mode light field is indeed obtained by replacing the usual bosonic creation and annihilation ...
C. A. Blockley   +5 more
core   +2 more sources

Design of a Deep Learning Model for Bronze Dagger Morphology Classification [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
In archaeology, buried cultural artifacts serve as important material evidence for distinguishing historical periods, and inferring the morphology and chronology of artifacts excavated from archaeological sites is a crucial task.
K. Kim, J. Yu
doaj   +1 more source

Constraint Quantization of Slave-Particle Theories

open access: yes, 1996
We start from the Barnes-Coleman slave-particle description, where the Hubbard operators $X$ are decomposed into a product of fermionic ($f_{\alpha}$) and bosonic ($b$) operators. The quantum mechanical constraint $b^{\dagger} b + \sum_{\alpha} f_{\alpha}
Christian Helm   +6 more
core   +1 more source

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