Results 21 to 30 of about 2,867,234 (274)

HUBUNGAN TINGKAT PENGETAHUAN DENGAN KEPATUHAN BEROBAT DI KLINIK PROGRAM TERAPI RUMATAN METADON DI PUSKESMAS PARAKAN KABUPATEN TEMANGGUNG [PDF]

open access: yesPharmaciana, 2016
Psycho active substance abuse is a common problem throughout the world, and it is associated with the increase of mortality and morbidity. One of substitution therapy program is methadone maintenance therapy program.
Sari Dwi Martiani, Heni Lutfi Yati
doaj   +1 more source

Efficiently Mapping Linear Algebra to High-Performance Code [PDF]

open access: yes, 2019
Aware of the role that linear algebra plays in scientific applications, we investigate if/how matrix expressions can be efficiently evaluated with current high-level languages.
Barthels, Henrik   +2 more
core   +1 more source

The impact of income inequalities on economic growth

open access: yesEkonomia i Prawo, 2020
Motivation: The problem of income inequalities is a growing one, worldwide. Therefore, it should be investigated how this phenomenon affects the prospects of productivity increase in a particular economy.
Łukasz Topolewski
doaj   +1 more source

Geometric calibration of a digital camera with a long-focus lens using a series of images with a common center of projection in the ProjNet software package [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
The article is a continuation of the research of the method of calibration of digital cameras equipped with a long-focus lens, using a series of images with a common projection center.
A. G. Chibunichev   +2 more
doaj   +1 more source

The un role in combating international terrorism: achievements and challenges

open access: yesRevista de Investigaciones Universidad del Quindío, 2022
Terrorism continues to be an urgent international problem, despite a slight decrease in terrorist activity after the military defeat of ISIS * in Syria and Iraq.
Aleksandr Borisovich-Orishev   +4 more
doaj   +1 more source

Defining Equitable Geographic Districts in Road Networks via Stable Matching

open access: yes, 2017
We introduce a novel method for defining geographic districts in road networks using stable matching. In this approach, each geographic district is defined in terms of a center, which identifies a location of interest, such as a post office or polling ...
Eppstein, David   +3 more
core   +1 more source

The Center Conditions and Bifurcation of Limit Cycles at the Degenerate Singularity of a Three-Dimensional System

open access: yesJournal of Applied Mathematics, 2014
We investigate multiple limit cycles bifurcation and center-focus problem of the degenerate equilibrium for a three-dimensional system. By applying the method of symbolic computation, we obtain the first four quasi-Lyapunov constants.
Shugang Song   +2 more
doaj   +1 more source

The Poincaré center‐focus problem for a class of higher order polynomial differential systems [PDF]

open access: yesMathematical Methods in the Applied Sciences, 2019
In this paper, I have proved that for a class of polynomial differential systems of degree n + 1 (where n is an arbitrary positive integer), the composition conjecture is true. I give the sufficient and necessary conditions for these differential systems to have a center at origin point by using a different method from the previous references. By this,
openaire   +2 more sources

Non-smooth quadratic centers defined in two arbitrary sectors [PDF]

open access: yes, 2016
In this paper we analyze the center-focus problem of some families of piecewise planar quadratic vector fields on two zones of R2. The zones we consider are two unbounded sectors defined by an arbitrary angle α and a fixed vertex.
García, I. A. (Isaac A.)
core   +2 more sources

Applications of algebraic methods in solving the center-focus problem

open access: yes, 2013
The nonlinear differential system $ \dot{x}=\sum_{i=0}^{\ell}P_{m_i}(x,y),\ \dot{y}=\sum_{i=0}^{\ell}Q_{m_i}(x,y)$ is considered, where $P_{m_i}$ and $Q_{m_i}$ are homogeneous polynomials of degree $m_i\geq 1$ in $x$ and $y$, $m_0=1$.
Popa, M.N., Pricop, V.V.
openaire   +3 more sources

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