356 research outputs found
NOTES ON THE INFORMATION STORED IN THE LOWER LEVELS OF THE HUNGARIAN SOIL TAXONOMY
This paper examines the information transfer of the units in the general purpose Hungarian soil classification in relation to land productivity evaluations. Statistical analyses of a national soil and plant production database have been applied. Results show that in some cases soil groupings, both in the general purpose taxonomy and productivity classifications, may be incorrect. Taxonomic misclassification can occur at higher levels of soil classification. Without a more specified classification of soil characteristics in the lower taxonomic units important information can be lost
Certifying an irreducible 1024-dimensional photonic state using refined dimension witnesses
We report on a new class of dimension witnesses, based on quantum random
access codes, which are a function of the recorded statistics and that have
different bounds for all possible decompositions of a high-dimensional physical
system. Thus, it certifies the dimension of the system and has the new distinct
feature of identifying whether the high-dimensional system is decomposable in
terms of lower dimensional subsystems. To demonstrate the practicability of
this technique we used it to experimentally certify the generation of an
irreducible 1024-dimensional photonic quantum state. Therefore, certifying that
the state is not multipartite or encoded using non-coupled different degrees of
freedom of a single photon. Our protocol should find applications in a broad
class of modern quantum information experiments addressing the generation of
high-dimensional quantum systems, where quantum tomography may become
intractable.Comment: Journal version (except for small editorial modifications), 4+12
pages, 7 figure
On retracts, absolute retracts, and folds in cographs
Let G and H be two cographs. We show that the problem to determine whether H
is a retract of G is NP-complete. We show that this problem is fixed-parameter
tractable when parameterized by the size of H. When restricted to the class of
threshold graphs or to the class of trivially perfect graphs, the problem
becomes tractable in polynomial time. The problem is also soluble when one
cograph is given as an induced subgraph of the other. We characterize absolute
retracts of cographs.Comment: 15 page
MEGJEGYZÉSEK A MAGYAR TALAJOSZTÁLYOZÁSI EGYSÉGEK INFORMÁCIÓTARTALMÁRÓL
This paper examines the information transfer of the units in the general purpose Hungarian soil classification in relation to land productivity evaluations. Statistical analyses of a national soil and plant production database have been applied. Results show that in some cases soil groupings, both in the general purpose taxonomy and productivity classifications, may be incorrect. Taxonomic misclassification can occur at higher levels of soil classification. Without a more specified classification of soil characteristics in the lower taxonomic units important information can be lost.A genetikai talajosztályozás egységeinek információ tartalma számos gyakorlati alkalmazáshoz nyújt alapot, köztük a talajbonitációhoz is. Vizsgálatainkkal arra kerestünk választ, vajon az osztályozási egységek elkülönítésére szolgáló kategória-határok valóban megfelelő felosztást eredményeznek-e, ha gyakorlati szempontból vizsgáljuk azokat. A statisztikai vizsgálatokkal nyert eredményeink azt mutatják, hogy a rendszertani kategóriák gyakran félrevezetők lehetnek a valós talajtulajdonságokat illetően, így a kategóriák interpretációs alkalmazásával nagymértékű
információvesztés történhet
Effects of enzyme treatment of the microfiltration of elderberry
The aim of this study was to evaluate the effect of microfiltration (MF) on the antioxidant capacity of elderberry juice using ceramic membrane. Previous to MF measurements preliminary examination was achieved with different enzymes. Four different samples were prepared: one without any enzyme and three with different pectolytic enzymes. The resistances were determined using the resistance-in-series model and difference between four enzyme-treated samples are evaluated. The effect of this technology on the antioxidant component of the clarified elderberry juice has been evaluated in permeate and retentate samples. For ferric reducing antioxidant power was measured with FRAP and total phenolic content (TPC) was determined with Folin Ciocalteau reagent. The total anthocyanin content (TAC) was estimated using spectrophotometric method. Higher juice yield was obtained using enzyme compared with enzyme-free elderberry pulp. The analytical results show that the MF membrane retained the valuable components in different rate. Significant losses are believed to have occurred after the MF clarification process due to fouling layer resistance, what can be decreased with pectolytic enzymes treatment
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Challenges and Answers of Urban Development Focusing Green Infrastructure in European Metropolises
Urban sprawl is a general problem of developed countries and several European strategies highlight the importance of controlled development, compact settlements structure, and protection of ecologic values. We analyzed European metropolis regions focusing on challenges of preservation of green infrastructure and controlling urban sprawl. Vienna has protected the green spaces in and around the city for a century already. In case of Munich, the “compact-urban-green” leitmotif was implemented. Rennes created a green belt around the city, protecting agricultural land and privileges high densification and the agglomeration is planned in a polycentric model. In our comparison analysis, we would like to draw the consequences for metropolitan region of Budapest for which the state adopted an act for shaping the frames of spatial development. The Urban Atlas elaborated by the European Environmental Agency helps us to compare the land development between 2006 and 2012 in the surveyed metropolis regions
A superadditivity and submultiplicativity property for cardinalities of sumsets
For finite sets of integers A1, . . . ,An we study the cardinality of the n-fold
sumset A1 + · · · + An compared to those of (n − 1)-fold sumsets A1 + · · · + Ai−1 +
Ai+1 + · · · + An. We prove a superadditivity and a submultiplicativity property for
these quantities. We also examine the case when the addition of elements is restricted
to an addition graph between the sets
A NEW AND FINITE FAMILY OF SOLUTIONS OF HYDRODYNAMICS. PART I: FITS TO PSEUDORAPIDITY DISTRIBUTIONS
A multi-detector array for high energy nuclear e+e- pair spectrosocopy
A multi-detector array has been constructed for the simultaneous measurement
of energy- and angular correlation of electron-positron pairs produced in
internal pair conversion (IPC) of nuclear transitions up to 18 MeV. The
response functions of the individual detectors have been measured with
mono-energetic beams of electrons. Experimental results obtained with 1.6 MeV
protons on targets containing B and F show clear IPC over a wide
angular range. A comparison with GEANT simulations demonstrates that angular
correlations of pairs of transitions in the energy range between 6 and
18 MeV can be determined with sufficient resolution and efficiency to search
for deviations from IPC due to the creation and subsequent decay into
of a hypothetical short-lived neutral boson.Comment: 20 pages, 8 figure
Turning with the others: novel transitions in an SPP model with coupling of accelerations
We consider a three dimensional, generalized version of the original SPP
model for collective motion. By extending the factors influencing the ordering,
we investigate the case when the movement of the self-propelled particles
(SPP-s) depends on both the velocity and the acceleration of the neighboring
particles, instead of being determined solely by the former one. By changing
the value of a weight parameter s determining the relative influence of the
velocity and the acceleration terms, the system undergoes a kinetic phase
transition as a function of a behavioral pattern. Below a critical value of s
the system exhibits disordered motion, while above it the dynamics resembles
that of the SPP model. We argue that in nature evolutionary processes can drive
the strategy variable s towards the critical point, where information exchange
between the units of a system is maximal.Comment: 13 pages, 9 figures, submitted to Phys Rev
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