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Problems of Structural Health Monitoring of Aircraft Component
No full textThe problems of experimental system of SHM are discussed in this article. The elements of ESHM system were designed and mounted in some zones structure and used far-field and near-field damage detection. As the objects of full-scale testing is used the helicopter MI-8 tail beam that is typical example of Al alloy structure. The ultrasonic methods were selected as a sensitive element of SHM system
Effect of Processing on the Microstructure and Crystalline Phase Composition of Wood Derived Porous SiC Ceramics
No full textPine (Pinus silvestris) wood samples were dried and impregnated with a SiO2 sol from a sol–gel process. The impregnation involved a two step process in a custom-made apparatus. Impregnated samples were dried and pyrolised at 500 °C under an oxygen-free atmosphere. SiC synthesis was performed in a high-temperature furnace in an argon atmosphere at a temperature of 1600 °C for 2, 4 and 8 h. The samples were investigated with X-ray diffraction (XRD) and field emission scanning electron microscopy (FE-SEM). The changes in the SiC synthesis time at the maximum temperature lead to changes in the microstructure and crystalline phase composition. An increase in the synthesis time opens up the possibility to produce mainly α-SiC crystalline modification containing porous SiC ceramics
CdZnTe Radiation Hardness Increasing by Laser Radiation
No full textRadiation damage occured in semiconductors devices during their operation and it impairds the ability of equipment. The work deals with study of possibility to increase the radiation hardness of CdZnTe crystal using laser radiation
Формирование наноструктуры на поверхности CdZnTe с помощью лазерного излучения
No full textПроведен эксперимент по облучению твердого раствора CdZnТe лазерным излучением. Согласно результатам эксперимента, после облучения поверхность образца представляла собой структуру, состоящую из наноконусов высотой 10 нм и диаметром в основании ≈ 10 нм. На спектрах Фотолюминесценции облученного образца, измеренных при температуре 5 К, наблюдались две новые полосы, соответствующие экситонным линиям А0Х и D0Х, смещенными в коротковолновую область спектра на 0,23эВ – экситонный квантовый размерный эффек
Nano-Cones Formation on a Surface of Semiconductors: Si,Ge, Si1-xGex , GaAs and CdZnTe Layers by Laser Radiation
No full text.A new laser method elaborated for a cone like nanostructure formation on a surface of semiconductors is reported. Diameter of the nano-cone is increased gradually from top of cone till a substrate. Such structure has qualitative new properties in comparison with QWs and QDs. For example, nano-cone with gradually changed diameter is gradient band gap structure. Model of the nanostructures growth and optical properties of nano-cones are proposed
Created Value of Fundamental Analysis During Pre and Post Crisis Period on the Baltic Equity Market
No full textFundamental analysis is widely applied by the majority of equity investors on the developed stock markets. However, it is still of questionable value on the emerging markets due to certain market constraints (e.g. low liquidity, small number of investors, weak transparency). The present research is the continuation of the study made by the authors in 2009. Value creation of fundamental analysis was tested within Baltic equity market context by applying key fundamental analysis ratios: PE, ROE, equity ratio, PB etc. to the stock selection. Liquidity, plausibility of earnings as well as dividend payments were checked whether they could be performance creation sources. These concepts were tested during three market phases: pre-crisis, crisis and post-crisis. One of the key conclusions drawn was that fundamental analysis gains popularity and is more often employed by Baltic investors, particularly in the post-crisis period
Labor Productivity Research for Latvian Production Branch Export Companies
No full textThis paper analyses exporting firms` labor productivity. We analyze empirical studies about difference from export and nonexport companies in term of productivity. This paper uses the generalised propensity score methodology and empirical methods. In this paper, we apply the newly developed generalized propensity score methodology that allows for continuous treatment, that is, different levels of the firms’ export activities. Using the generalized propensity score method and panel data for Latvian manufacturing firms, we estimate the correlation between export based companies and labor productivity level. We expect that companies export activities are crucial for labor productivity growth.
The main hypothesis point is concerned about more productive firms involved into export markets. The reason for this is that selling goods in foreign countries involves additional costs and more competiveness skills. Additional extra costs that includes marketing, transportation costs, distribution, the cost of personnel involves high skills to manage foreign markets, or production costs. These companies need additional attention modifying domestic products for foreign consumption. These costs provide an entry barrier that less successful and competiveness lack firms cannot overcome.
In the empirical investigation we used data from local production branch, from cross sectional data collected in regular surveys by the Central Statistical Bureau. The research cover general data gathered Latvian manufacturing industries that employ at least 20 persons in the local production unit or in the company that owns the unit. Therefore, companies (small and microsmall) with less than 20 employees in total do not report to the surveys. In this paper annual data for 2000 to 2010 , in order to minimize statistical error, are used.
The most anticipated result of year-specific estimations is the severe recession in labor productivity growth in 2009. The labor productivity growth rate at very high levels of the export-sales ratio is even smaller than the growth rate of nonexporting firms, although not significantly so.
Conclusions.
In this research we analyzed the possible relationship between companies’ labor productivity growth rates and their export orientation. We described that there is an effect of companies’ export activities on labor productivity growth.
During our research we found that the relationship between labor productivity growth and the exportsales ratio is not necessarily stable over time. This is a unanticipated result.
Our results, describes a time-varying relationship between labor productivity growth and the export-sales ratio. The reason for this result might be that companies also sell their products not necessarily in European Union, but also in more distant and technologically less advanced countries. This could increase the costs of coordination and control of exporting firms, but companies are less likely to benefit from this kind of exporting, if they export to a technologically less advanced country this means that innovation level of their product is also not so important as for advanced countries in EU
Inovatyviu mokymosi galimybiu pletra bendradarbiavimo per siena projektuose
No full textNestabili ekonornine situacija nuolat reikalauja etektyvesniu bei inovatyvesniu pnemoniu padeciat
val.dyti bei gerinti. BOtinas zlngsnis - ieskoti ir taikyti tokius verslumo skatinimo bOdus, kurie butu
efektyvesni, labiau prieinami ir uztikrintu testlni aplinkos gerinimo rezuttata. Verslumo bei darbo vletu
kOrimo prograrnos neatsiejama dalis - svietimas ir iini4 apie verslurna bei efektyvesni verslo valdymq
skleidimas bei didesnis prieinamumas.
Ypatingo demesio reikalauja labiausiai paieidiiami, nuo ekonominiu saliu centru nutole regional,
kurie kaip ir iki ekonominio nuosmukio taip pat ir po jo isgyveno didesnius sunkumus, nes ribotai
aprOpinami finansiskai, neturi gatlrnybes plesti savo infrastuktOras, neturi efektyvesnio iini4 prieinamumotinklo,
galimybes taikyti efektyvias ir inovatyvias technologijas, gerinant regionin] konkurencingumq
ir skatinant darbo vietu kurima.
Prie tokiu regionu galima priskirti Lietuvos bei Latvijos pasienio sritis.
Siekiant pritaikyti svietirno sistemoje naudojamas siuolaikines, inovatyvias mokymosi technologijas
jau sukurtam ar besikurlanciarn verslui regionuose, Lietuvos - Latvijos bendradarbiavimo per siena
prograrnos rernuose vykdomi ES strukturiniu fondu projektai. Siame pranesime pristatoma Lietuvos -
Latvijos bendradarbiavimo per siena programa bei trys programos projektai:
.Mokyrnosi visa gyvenimq kokybes gerinimas pasienio regione" - 5L;
.Konkurencingos verslo aplinkos sukOrimas mokantis visa gyvenima" - COOP EDU-SHIP;
.Kompleksinis e. mokymosi, televiziniu ir moblllu technologiju taikymas skatinant naujus verslus" - eBig3
Bīstamo atkritumu inovatīvās vadīšanas teorētiskie pamati
No full textBīstamo atkritumu vadīšanas sistēmai Latvijā, kā arī visā Eiropā, jābūt pakļautai nepārtrauktai elastīgi-dināmiskajai tehniski-sociāli-ekonomiskajai pilnveidošanai un kontrolei. Nacionālās apsaimniekošanas sistēmas izveidošanas procesā jāņem vērā bīstamo atkritumu un to neitralizācijas procesu vispusīgās ietekmes uz valsts ekoloģiski-ekonomiskajiem rādītājiem mērogu, nepieciešams novērtēt un ekonometriski modelēt bīstamo atkritumu ģenerēšanas un vadīšanas rezultatīvus rādītājus. Adekvāto bīstamo atkritumu tehniski-ekonomisko vadīšanas metožu izvēlei un vadīšanas rezultātu novērtēšanai nepieciešams filozofiski-teorētiskais pamatojums
Conditional Linear Periodical Random Process as a Mathematical Model of Photoplethysmographic Signal
No full textIn this paper a new mathematical model of photoplethysmographic signal is proposed. This mathematical model is built as a conditional linear random process that allows representing main biophysical peculiarities both of the signal creation and of signal stochastic periodicity. It makes possible analyzing the photoplethysmographic signal with the help of the method of characteristic functions