Âzykovaâ igra kak lingvističeskaâ refleksiâ: neprâmaâ kommunikaciâ v zerkale âzykovoj igry

This article is devoted to the reflection in “the mirror of the speech game" of indirect communication. The following types of the speech game reflecting different aspects of indirect communication are presented, for example: reflecting mental complication of non-conventional means of speech, indirect communion, indirect report, indirect influence. Special attention was paid to the reflection of the speech game itself in speech game

A parallel algorithm for solving one problem of nonlinear optics

This paper deals with a system of nonlinear differential equations, which describe the interaction of two focused laser beams in nonlinear media. The system of equations is approximated by a splitting finite difference scheme. A parallel version of the finite‐difference scheme is proposed and the efficiency of this algorithm is investigated. Calculations are performed using clusters of computers, connected via local computer network. The emphasis is made on solving this problem on heterogeneous clusters. In the paper a static distribution scheme is analyzed. The results of several computational experiments are presented. Data redistribution during an initial phase of computation is investigated and the influence of slow communication among the processes is taken into account during this analysis. Netiesinės optikos uždavinio lygiagretusis skaičiavimo algoritmas Santrauka Straipsnyje sprendžiama netiesiniu diferencialiniu lygčiu sistema, aprašanti lazerio spinduliu saveika netiesineje terpeje. Sudaryta diskrečioji išskaidymo schema bei pateikta lygiagrečioji algoritmo versija. Ištirtas lygiagrečiojo algoritmo efektyvumas. Skaičiavimai atlikti virtualiajame kompiuteriu, sujungtu lokaliuoju tinklu, klasteryje. Išsamiai tiriamas algoritmo efektyvumas heterogeniniams lygiagretiesiems kompiuteriams. Duomenu paskirstymui naudojamas statinis paskirstymo metodas. Pateikti ir išanalizuoti duomenu perskirstymo algoritmai, pagerinantys darbo paskirstymo tolyguma pradineje skaičiavimu fazeje. Teorineje analizeje atsižvelgiama i duomenu perdavimo kaštus. First Published Online: 14 Oct 201

Parallel numerical modelling of short laser pulse compression

In this paper we investigate parallel numerical algorithms for solution of the transient stimulated scattering processes. A new symmetrical splitting scheme is proposed and a parallel version is given. The efficiency of the parallel algorithm is investigated for two cases. The first one describes a case when the computation region is constant during the whole time of computations. The second one describes the initial phase of the process, when the computational region increases linearly in time. In order to distribute more evenly jobs between processors a dynamical the grid redistribution algorithm is is used. We also give a proof of one result about optimal static grid distribution in the case of linearly increased problem complexity. The results of computations are presented. They were obtained on different parallel computers and clusters of workstations. Trumpų lazerio impilsų spūdos skaičiavimo lygiagretusis skaitinis algoritmas Santrauka Nagrinejamas priverstines Brijueno sklaidos fokusuotuose pluoštuose uždavinio lygiagretusis skaitinis sprendimo algoritmas. Sukonstruota simetrinio skaidymo baigtiniu skirtumu schema, kurios tikslumas yra antrosios eiles. Lygiagretusis algoritmas gautas naudojant duomenu lygiagretumo paradigma. Detaliai nagrinejamas dinamiškai didejančio sudetingumo uždavinys, modeliuojantis Brijueno sklaidos procesa, kai neužduodama kraštine salyga Stokso bangai. Irodyta hipoteze apie vieno stacionaraus blokinio duomenu paskirstymo algoritmo op‐timaluma. Eksperimentiškai ištirtas dinaminis duomenu perskirstymo algoritmas, patvirtintas jo efektyvumas net ir fiksuoto dydžio uždaviniams. Darbe pateikti skaitinio eksperimento, atlikto naudojant VGTU 20 procesoriu klasteri, rezultatai. Jie patvirtino gautuosius teorinius rezultatus, išsam us fizikiniai rezultatai bus išspausdinti kituose darbuose. First Published Online: 14 Oct 201

Modeling of generation dynamics of passively and actively Q‐switched solid‐state lasers

A theoretical model for simulation of generation dynamics of microchip lasers is presented. A number of physical effects influencing generation of microchip lasers that are usually omitted are accounted. Results of theoretical calculations are in good agreement with experimental data. Kietakūnių lazerių su pasyvia ir sktyvia kokybės moduliacija generacijos dinamikos modeliavimas Santrauka Kietakūniai lazeriai su pasyvia ir aktyvia kokybes moduliacija naudojami ivairiose mokslo ir technikos srityse. Tarp kietakūniu lazeriu plačiausiai naudojami iki šiol yra lazeriai Nd:YAG pagrindu. Pasyvi kokybes moduliacija yra paprasčiausias kokybes moduliacijos būdas. Todel Cr4+: YAG ir giminingu kristalu isisotinimo mechanizmai plačiai tyrinejami. Naudojant keturiu lygmenu modeli su greita relaksacija, gautos paprastos analizines išraiškos isisotinančiai sugerčiai. Tačiau toks modelis neleidžia iskaityti skirtumo tarp na‐nosekundiniu ir pikosekundiniu impulsu, naudojamu eksperimentuose, ir gausinio intensyvumo pasiskirstymo pluošto skerspjūvyje. Šiame darbe siūlomas patobulintas modelis Cr4+: YAG sugerties skerspjūviu nustatymui. Parodyta, kad turi būti iskaityti šuoliai tarp sužadintu singletinio ir tripletinio lygmenu penkiu lygmenu schemoje, siekiant iskaityti skirtingas žadinančiu impulsu trukmes. Siūlomo modelio lygtyse atsižvelgta i žadinančio pluošto difrakcija, todel tinkamai aprašomas sufokusuoto pluošto sklidimas isisotinančiame sugeriklyje. Skaitmeniniam lygčiu sistemos sprendimui naudotas atskyrimo pagal fizikinius daugiklius būdas. Taikytas atskyrimo būdas tenkina tvermes desnio diferencialiniam uždaviniui baigtiniu skirtumu analoga. Šiame darbe pateiktas sugeriklio modelis igalina detalu impulsu su sudetinga erdvine‐laikine struktūra pralaidumo dinamikos modeliavima. Neseniai pademonstruoti miniatiūriniai mikrolazeriai Nd pagrindu su pasyvia kokybes moduliacija, kuriu rezonatoriaus ilgiai yra milimetru eiles ir kurie kaupinami lazeriniais diodais. Šie irenginiai generuoja impulsus, kuriu pasikartojimo dažniai kilohercu eiles ir kuriu trukmes siekia 100ps. Ju generacija stabilesne negu daugelio sistemu su modu sinchronizacija. Lazeriu su pasyvia kokybes moduliacija trūkumas yra žymi impulso pasirodymo momentu sklaida, veikiant impulsu serijos generacijos režime. Gerai žinoma, kad lazeriai su kombinuota aktyvia ir pasyvia kokybes moduliacija pasižymi žymiai mažesne laikine sklaida. Šiame darbe siūlomas teorinis modelis kieto kūno mikrolazeriu su kokybes moduliacija ir nuolatiniu diodiniu kaupinimu generacijos modeliavimui, atsižvelgiant i apatinio darbinio lygmens baigtine gyvavimo trukme, sugerti iš sužadintos būsenos isisotinančiame sugeriklyje, savaiminio spinduliavimo ir kaupinimo energijos fluktuacijas, isisotinančio kristalinio sugeriklio kristalografiniu ašiu orientacija spinduliuotes poliarizacijos atžvilgiu ir pan. Parodyta, kad rezultatai, gauti naudojant ši modeli, gerai sutampa su žinomais eksperimentiniais rezultatais. First Published Online: 14 Oct 201

Magnetic Field Saturation in the Riga Dynamo Experiment

After the dynamo experiment in November 1999 had shown magnetic field self-excitation in a spiraling liquid metal flow, in a second series of experiments emphasis was placed on the magnetic field saturation regime as the next principal step in the dynamo process. The dependence of the strength of the magnetic field on the rotation rate is studied. Various features of the saturated magnetic field are outlined and possible saturation mechanisms are discussed.Comment: 4 pages, 8 figure

Articipation and Resilience of Firms in Global Value Chains During An External Shock: Insights from the Covid-19 Pandemic

At the present time, companies in GVCs are at risk of activity interruptions during various external shocks. With the increasing prominence of global value chains (GVCs), there is a growing demand for discussing the specifics of GVC participants and assessing their resilience to shocks that is explored in this study

ON MULTIPLE BROODS AND THE BREEDING STRATEGY OF ARCTIC SANDERLINGS

Sanderlings on Bathurst Island in the Canadian arctic have two patterns of incubation. At some nests the eggs are covered soon after the fourth egg has been laid and at others incubation is delayed for 5–6 days. Because the delay is about the same time required to lay a second clutch and because a single individual alone incubates at any one nest, we suspected that Sanderlings might normally lay two clutches in a season, the male caring for one brood and the female for the other. Histological and gross examination of the ovaries of two females taken as the birds began incubation showed eight freshly ovulated follicles in each female. The size gradation and histological appearance of the follicles indicated that two clutches of four eggs each had been laid within 8–10 days by a single female. The ovary of one female had additional large yolky follicles, suggesting a physiological capability of further ovulations. Field conditions in the arctic summer are highly variable, and the small eggs and the rapid sequence of broods of Sanderlings may be breeding adaptations that permit them to multiply the traditional wader clutch of four eggs by 2 or 3 in favourable years. Selection for mating systems characterised by brief pair bonds and by polyandry is expected in precocial birds where some broods are incubated and cared for by the male, but further field work is required to determine the precise mating system of Sanderlings.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/74788/1/j.1474-919X.1973.tb02638.x.pd

Detection of a flow induced magnetic field eigenmode in the Riga dynamo facility

In an experiment at the Riga sodium dynamo facility, a slowly growing magnetic field eigenmode has been detected over a period of about 15 seconds. For a slightly decreased propeller rotation rate, additional measurements showed a slow decay of this mode. The measured results correspond satisfactory with numerical predictions for the growth rates and frequencies

INVESTIGATION OF FILTERING AND OBJECTS DETECTION ALGORITHMS FOR A MULTIZONE IMAGE SEQUENCE

The problem of detecting objects on a sequence of images with a complex structure is considered. Optimal and quasi-optimal algorithms for processing multidimensional images have been synthesized and investigated. Improved detection efficiency has been obtained by adequately describing real data using doubly stochastic random fields. The possibility of describing Earth remote sensing data using doubly stochastic models is investigated. The possibility of obtaining significant gains when filtering satellite material and detecting extended objects on it due to the adaptive structure of such models and processing time sequence of multizone images as a single multidimensional dataset is shown. The gains for filtering algorithms in the error variance are about 80% comparing single frame processing, and the gains for detecting algorithms in the signal/noise ratio are about 70% comparing single frame processing