283 research outputs found
Ügyfélkapcsolat menedzsment rendszerek nyílt forráskódú szoftverekkel
The object of this study is a comprehensive review of the open source customer
relationship management (CRM) systems. The open source softwares have become one of the most
important trends in the software industry recently. Similarly, the CRM systems are applied more
increasingly in several fields of economy. The CRM is not merely a subsequent software technology
and application in the field of Business Intelligence, but rather a novel, comprehensive customercentric
approach to an organization’s philosophy in dealing with its customer for the sake of
realization of short- and long-range business target contrary to the traditionally widespread productcentric
approach. Following a short synopsis of the theoretical and practical aspects of the CRM
systems we analyse the scope of CRM-supported business activities and processes, then the actual
market forecasts and the range of the effective and potential users of the proprietary and open source
CRM solutions. We make an attempt to give a general overview of the advantages and disadvantages
of applying open source CRM software solutions including the discussion of user benefits and costs
and the applied software technologies
Assessment of the effects of urbanization on trace elements of toe bones
Amphibians, particularly frogs and toads, are
increasingly used as bioindicators of contaminant
accumulation in pollution studies. We developed an
analytical technique to analyse their elemental contents
based on a small amount of toe bone samples. This
method is environment-friendly as, unlike traditional
methods, it is not necessary to kill animals during
sampling. Using this technique, we explored the effects
of urbanization on the elemental contents of toe bones.
Bufo bufo
specimens were collected from an urban
and two rural ponds. The ratios of Ca and P at the
ponds were: 20.5% Ca and 14.6% P at the urban pond
and 30.4% and 29.6% Ca, 22.4% and 21.7% P at the
rural ponds, respectively. For the other elements, the
following percentage ratios were found: 0.7% B,
0.3% Mg and 0.06% Zn at the urban pond and 1.1%
and 0.4% B, 0.4% Mg and 0.05% Zn at the rural
ponds, respectively. Canonical discriminant analysis
indicated the separation of the urban and the rural
ponds based on the elemental concentrations of toe
bones. Significant differences were found between the
concentrations of Ca, P, Mg, B and Zn at the urban
and the rural ponds (
p
<0.05). Anthropogenic activity
was found to have effects on the elemental contents of
toe bones in the urbanized area. Our study also
demonstrated that the developed method was appro-
priate for the elemental analysis of small samples to
assess the effects of urbanization
Discrete and Continuous Caching Games
Alpern's Caching Game is played by players. Player is a squirrel, who
is hiding his nuts in different holes, with the restriction that he can
only dig down a distance of metre altogether. After that, Player wants
to find all the nuts, and she is allowed to dig down a distance of metres
altogether. Player wins after finding all the nuts, if she fails then the
squirrel wins. We investigate a discrete version of the game, finding
strategies and statements for both smaller and general values of . In
particular, we answer a question of P\'alv\"olgyi, by exhibiting an example,
where the value of the game can change depending on which nut the squirrel
reveals, when he has multiple options in the discrete game. We also investigate
and invent other continuous versions of the game, one of them having a
connection to the Manickam-Mikl\'os-Singhi Conjecture.Comment: 22 pages, 8 figure
Spin gap and Luttinger liquid description of the NMR relaxation in carbon nanotubes
Recent NMR experiments by Singer et al. [Singer et al. Phys. Rev. Lett. 95,
236403 (2005).] showed a deviation from Fermi-liquid behavior in carbon
nanotubes with an energy gap evident at low temperatures. Here, a comprehensive
theory for the magnetic field and temperature dependent NMR 13C spin-lattice
relaxation is given in the framework of the Tomonaga-Luttinger liquid. The low
temperature properties are governed by a gapped relaxation due to a spin gap (~
30K), which crosses over smoothly to the Luttinger liquid behaviour with
increasing temperature.Comment: 5 pages, 1 figure, 1 tabl
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