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292992571 
Tangent structures and analytical mechanics.


292992570 
Complex search: aggregation, discovery, and synthesis/ Kompleksotsing: agregatsioon, avastamine ja suntees.
Search engines such as Google, Bing, and Yahoo, supplemented by
other information search portals like Wikipedia, have become the means
for searching information on the Internet. Along with the...


292992569 
Disturbance decoupling of multiinput multioutput discretetime nonlinear systems by static measurement feedback/ Hairingu kompenseerimine mittelineaarsetest diskreetsetest mitme sisendi ja mitme valjundiga juhtimissusteemidest staatilise tagasisidega.
This paper addresses the disturbance decoupling problem (DDP) for
nonlinear systems, extending the results for continuoustime systems
into the discretetime case. Sufficient conditions are given...


292992568 
Plasmochemical process for the production of niobium and tantalum nanopowders/Nioobiumi ja tantaalinanopulbrite tootmine.
Niobium and tantalum powders used in modern manufacturing are
materials with nanostructure. The authors have studied and optimized the
process of the production of niobium and tantalum nanopowders...


292992567 
Raytraced images for testing the reconstruction of fibre orientation distributions/Fotorealistlikud pildid rekonstrueeritud luhikiudude orientatsiooni jaotuste testimiseks.
The orientation distribution of fibres is relevant to the
properties of a number of different kinds of fibrous materials from many
fields like biology and engineering, including short fibre...


292992566 
Generalized Langevin equation with multiplicative trichotomous noise/ Multiplikatiivse kolmetasemelise mura toime uldistatud Langevini vorrandis.
The influence of noise flatness and memorytime on the dynamics of
a generalized Langevin system driven by an internal MittagLeffler noise
and by a multiplicative trichotomous noise is studied....


292992565 
Assessment of natural radiation exposure from building materials in Estonia/ Ehitusmaterjalides leiduvatest looduslikest radionukliididest pohjustatud elanikudoosi hinnang.
Radionuclides naturally occurring in building materials may
significantly contribute to the annual doses of the public. As
information on the radioactivity of such materials is lacking, the...


282824708 
A Voronovskayatype theorem for the second derivative of the BernsteinChlodovsky polynomials/Voronovskaja tuupi teoreem BernsteiniChlodovsky polunoomide teise tuletise kohta.
This paper is devoted to a Voronovskayatype theorem for the second
derivative of the BernsteinChlodovsky polynomials. This type of theorem
was considered for the BernsteinChlodovsky polynomials...


282824707 
Comments on mesoscopic continuum physics: evolution equation for the distribution function and open questions/Selgitusi mesoskoopilise pideva keskkonna fuusika juurde: jaotusfunktsiooni evolutsioonivorrand ja lahtised kusimused.
In mesoscopic continuum physics it is common to introduce a
mesoscopic distribution function. Often also an evolution equation is
derived for this distribution function. The mesoscopic balance...


282824706 
On conformal geospatial transformations with complex polynomials/Konformsetest georuumilistest teisendustest komplekssete polunoomidega.
We consider conformal reprojections of geographic information
system data with complex polynomials as compared to reprojections with
commercial software packages. We show that in regular cases...


282824705 
Removal of radionuclides from Estonian groundwater using aeration, oxidation, and filtration.
Groundwater in the northeastern suburb of Tallinn was analysed to
determine the content of iron, manganese, sulphides, ammonia, and
radionuclides ([Ra.sup.226], [Ra.sup.228]) and total...


282824704 
Ultrasonic online spectrophotometric system for reaction kinetic measurements/ Spektrofotomeetriline onlinesusteem reaktsioonikineetika uurimiseks ultraheli all.
A unique ultrasonic online spectrophotometric system for kinetic
measurements of homogeneous polar reactions under ultrasound was
developed. The setup consists of an ultrasonic bath, an HPLC...


282824703 
Integrated carbon nanotube fibrequartz tuning fork biosensor/ Helihargi tuupi kvartsresonaatoriga integreeritud susiniknanotorufiibril baseeruv biosensor.
We report on a novel labelfree biosensor for in situ measurements
in liquid. It is comprised of a porous carbon nanotube (CNT) fibre
attached to one prong of a quartz tuning fork (QTF) resonator....


282824702 
Morita invariants for partially ordered semigroups with local units/Lokaalsete uhikutega osaliselt jarjestatud poolruhmade Morita invariandid.
We study Morita invariants for strongly Morita equivalent partially
ordered semigroups with several types of local units. These include the
greatest commutative images, satisfying a given...


282824701 
On invariant submanifolds of transSasakian manifolds/ TransSasaki muutkonna invariantsetest alammuutkondadest.
The object of the present paper is to find necessary and sufficient
conditions for invariant submanifolds of trans Sasakian manifolds to be
totally geodesic. As a remark, particular cases of...


282824700 
On an ([epsilon], [delta])transSasakian structure/([epsilon], [delta])transSasaki muutkondadest.
In this paper we investigate ([epsilon], [delta])transSasakian
manifolds which generalize the notion of ([epsilon]) Sasakian and
([epsilon])Kenmotsu manifolds. We prove the existence of such...


282824699 
Some characterizations of null osculating curves in the Minkowski spacetime/Nullkooldumiskoverate iseloomustusest Minkowski aegruumis.
In this paper we give the necessary and sufficient conditions for
null curves in to be osculating curves in terms of their curvature
functions. In particular, we obtain some relations between null...


275576209 
On dispersion properties of surface motions in the Gulf of Finland/ Soome lahe pinnakihi hoovuste dispersioonist.
The spreading rate of initially closely located water particles and
passive drifters in the surface layer of the Gulf of Finland is studied
using autonomous surface drifters. The average spreading...


275576208 
Output signal based combination of two NLMS adaptive filterstransient analysis/Valjundsignaalidel baseeruv adaptiivsete NLMSfiltrite kombinatsioon: koonduvusanaluus.
A combination of two complex normalized least mean square (NLMS)
adaptive filters that adapt on the same input signal at the same time is
investigated. One of the filters has a large and the other...


275576207 
Generalized Sasakian space forms with semisymmetric nonmetric connections/Poolsummeetrilise mittemeetrilise seostusega uldistatud Sasaki ruumivormid.
We introduce generalized Sasakian space forms with semisymmetric
nonmetric connections. We show the existence of a generalized Sasakian
space form with a semisymmetric nonmetric connection and...


275576206 
Strong summability methods in a Riesztype family/Tugeva summeeruvuse menetlused Rieszi tuupi peres.
We continue our studies on Riesztype families of summability
methods for functions and sequences, started in Proc. Estonian Acad.
Sci., 2008, 57, 7080 and Math. Model. Anal., 2010, 15, 103112....


275576205 
Morita theorems for partially ordered monoids/Moritateoreemid osaliselt jarjestatud monoidide jaoks.
Two partially ordered monoids S and T are called Morita equivalent
if the categories of right Sposets and right T posets are
Posequivalent as categories enriched over the category Pos of...


275576204 
Some characterizations of Mannheim partner curves in the Minkowski 3space [E.sup.3.sub.1]/Mannheimi partnerkoverate iseloomustus Minkowski 3ruumis [E.sup.3.sub.1].
In this paper, we give some characterizations of Mannheim partner
curves in the Minkowski 3space [E.sup.3.sub.1]. Firstly, we classify
these curves in [E.sup.3.sub.1]. Next, we give some...


275576203 
Approximation in variation by the Kantorovich operators/ Kantorovichi operaatoritega lahendamine variatsiooni mottes.
We discuss the rate of approximation of the Kantorovich operators.
The rate of approximation is given with respect to the variation
seminorm.


268604063 
Monitoring of polychlorinated dibenzopdioxins, polychlorinated dibenzofurans, and polychlorinated biphenyls in Estonian food/Poluklooritud dibensopdioksiinide, dibensofuraanide ja bifenuulide seire Eesti toidus.
Persistent organic pollutants are mainly compounds that include
chlorine, which are posing a threat to human health and impairing living
organisms and ecosystems due to their toxicity,...


268604062 
The effect of halide ions on nickel corrosion in perchloric acid solutions/Halogeniidioonide moju nikli korrosioonile perkloorhappelahuses.
A comparative study of the effect of halide anions on the corrosion
of mechanically and chemically polished nickel in perchloric acid
solutions was carried out. Perchloric acid was chosen for the...


268604061 
Some comments on the theory of short fibre reinforced materials/Kommentaare luhikeste kiududega armeeritud materjalide teooriale.
The orientation of fibres in short fibre reinforced materials is
essential for the properties of the composite. It is state of the art to
use an orientation number to estimate how many fibres are...


268604060 
A note on the relationship between single and multiexperiment observability for discretetime nonlinear control systems/Uhel ja mitmel eksperimendil pohinevate vaadeldavuse definitsioonide vahelisest seosest diskreetajaga mittelineaarsete susteemide jaoks.
The connection between the concepts of the singleexperiment and
the multi experiment unobservability of a nonlinear discretetime
control system is studied. The main result claims that if the...


268604059 
Parahyperhermitian structures on tangent bundles: dedicated to the memory of Professor Stere Ianus (19392010)/Para huperhermiitilised struktuurid puutujakihtkondadel.
In this paper we construct a family of almost parahyperhermitian
structures on the tangent bundle of an almost parahermitian manifold
and study its integrability. Also, the necessary and...


268604058 
Necessary conditions for inclusion relations for double absolute summability/ Kahekordsete ridade maatriksmenetluste absoluutse sisalduvuse tarvilikud tingimused.
We establish necessary conditions for a general inclusion theorem
involving a pair of doubly triangular matrices. As corollaries we obtain
inclusion results for some special classes of doubly...


268604057 
On infinitesimal holomorphically projective transformations on the tangent bundles with respect to the Sasaki metric/Infinitesimaalsetest holomorfselt projektiivsetest teisendustest Sasaki meetrika suhtes puutujavektorkondadel.
The purpose of the present article is to find solutions to a system
of partial differential equations that characterize infinitesimal
holomorphically projective transformations on the tangent...


268604056 
Properties of TQalgebras/TQalgebrate omadusi.
Several properties of unital left (right) TQalgebras are
described. The conditions when a unital semitopological algebra is a
left (right) TQalgebras are given. It is shown that the space M(A)...


258241640 
Tangent structures and analytical mechanics/ Puutujastruktuurid ja analuutiline mehaanika.
We establish a link between the sectorforms of White and the
exterior forms of Cartan. We show that the Hamiltonian system on
[T.sup.2]M reduces to Lagrange's equations on the osculating...


258241639 
Approximation in variation by the MeyerKonig and Zeller operators/MeyerKonigi ja Zelleri operaatoritega lahendamine variatsiooni mottes.
The convergence in variation and the rate of approximation of the
MeyerKonig and Zeller operators are discussed. It is proved that for
absolutely continuous functions the rate of approximation...


258241638 
On determinability of idempotent medial commutative quasigroups by their endomorphism semigroups/Idempotentsete mediaalsete kommutatiivsete kvaasiruhmade maaratavusest oma endomorfismipoolruhmadega.
We extend the result of P. Puusemp (Idempotents of the endomorphism
semigroups of groups. Acta Comment. Univ. Tartuensis, 1975, 366, 76104)
about determinability of finite Abelian groups by their...


258241637 
Ford lemma for topological *algebras/Fordi lemma topoloogiliste *algebrate korral.
Several analogies of Ford lemma for topological algebras (in
particular, for topological *algebras) are proved (without using
projective limits). Topological *algebras, in which a...


258241636 
Calculating the output signal parameters of a lactose bienzymatic biosensing system from the transient phase response/Laktoosi biosensori valjundsignaali parameetrite arvutamine tasakaalueelsetest andmetest.
We constructed for the determination of lactose a bienzymatic
biosensing system based on a fibreoptical oxygen sensor and two
enzymes[beta]galactosidase ([beta]gal, from Aspergillus...


258241635 
Static state feedback linearizability: relationship between two methods/ Lineariseeritavus staatilise olekutagasisidega: kahe meetodi vahelised seosed.
The paper establishes the explicit relationship between two sets of
necessary and sufficient conditions for static state feedback
linearizability of a discretetime nonlinear control system. A...


258241634 
A study on generalized absolute summability factors for a triangular matrix/Kolmnurksete maatriksmenetluste uldistatud absoluutse summeeruvuse teguritest.
In this paper, we establish a summability factor theorem for
summability [[absolute value of A, [delta]].sub.k]. This paper is an
extension of the main result of Savas, E. A study on...


258241633 
Convergence of the pBieberbach polynomials in regions with zero angles/ pBieberbachi polunoomide uhtlane koonduvus nulliliste nurkadega piirkondades.
Uniform convergence of the pBieberbach polynomials is proved in
the case of a simply connected region bounded by a piecewise
quasiconformal curve with certain interior zero angles on the...


252848124 
A new method for the synthesis of 3hydrazinopropyl trimethoxysilane/ Uus meetod 3hudrasinopropuultrimetoksusilaani sunteesiks.
A new method for the synthesis of 3hydrazinopropyl
trimethoxysilane is proposed. The method is relatively simple and is
based on hydrosilylation like the synthesis of analogous aminosilanes.
For...


252848123 
Content and composition of essential oils in some Asteraceae species/ Eeterliku oli sisaldus ja koostis monedes Asteraceae sugukonna taimeliikides.
The content and composition of the essential oils of five
Asteraceae species from Estonia were studied. The oil yields ranged from
traces up to 0.2%. By using GCFID and GCMS methods a total of...


252848122 
Model checking of emergent behaviour properties of robot swarms/ Robotiparvede ilmneva kaitumise mudelkontroll.
This paper presents a case study on scalability of explicit state
model checking. Three state space reduction methodsstate vector
compression, bit state hashing, and symmetry reductionwere...


252848121 
Robust state controller via reflection coefficient assignment/Robustse olekuregulaatori suntees peegelduskoefitsientide kaudu.
A solution to the robust pole assignment problem via reflection
coefficients of polynomials is provided for discretetime singleinput
singleoutput (SISO) and multiinput multioutput (MIMO)...


252848120 
On submersivity assumption for nonlinear control systems on homogeneous time scales/Submersiivsuse eeldusest mittelineaarsete juhtimissiisteemide jaoks homogeensetel ajaskaaladel.
The paper derives a condition that allows construction of the
adifferential fields for nonlinear control systems, described by the
set of inputoutput (i/o) higherorder deltadifferential...


252848119 
A strong convergence theorem on generalized equilibrium problems and strictly pseudocontractive mappings/Tugev koonduvusteoreem uldistatud tasakaalu iilesannete ja rangelt pseudoahendavate kujutuste kohta.
In this paper, we consider a general iterative process for a
generalized equilibrium problem and a strictly pseudocontractive
mapping. A strong convergence theorem of common elements of the...


252848118 
On pseudoslant submanifolds of transSasakian manifolds/TransSasaki muutkondade pseudolangus alammuutkondadest.
The object of the present paper is to study pseudoslant
submanifolds of transSasakian manifolds. Integrability conditions of
the distributions on these submanifolds are worked out. Some...


244159107 
Transformations of semiholonomic 2 and 3jets and semiholonomic prolongation of connections/Poolholonoomsete 2 ja 3dzettide teisendused ning seostuste poolholonoomne jatkamine.
We recall the description of natural transformations of
semiholonomic jet functors [[bar.J].sup.r] defined on the categories M
[f.sub.m] x M f and F [M.sub.m,n]. Up to order three, exact...


244159106 
Finding a class of 2groups/Uhe 2ruhmade klassi leidmine.
Let n [greater than or equal to] 3 be an integer and [C.sub.m]
denote a cyclic group of order m. All groups which can be presented as a
semidirect products ([MATHEMATICAL EXPRESSION NOT...


244159105 
Group actions, orbit spaces, and noncommutative deformation theory/Ruhmatoimed, orbiitruumid ja mittekommutatiivne deformatsiooniteooria.
Consider the action of a group G on an ordinary commutative
kvariety X = Spec (A). In this note we define the category of
AGmodules and their deformation theory. We then prove that...
