Latvian Academy of Sciences

Riga, Latvia

Latvian Academy of Sciences

Riga, Latvia
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Riga, Latvia, May 02, 2017 --( The competition aims to support oncology patients and their relatives through art, call to resist the severe diagnosis, and promote the joy of living and recovery. The competition is open to any art lover around the world and artworks are especially welcome from those who have been able to defeat cancer. The slogan of the competition is – Art wins! The Head of the Foundation, Mr. Einars Repše commented: “Oncology patients are entitled to the quality of life even during the toughest stages of their treatment. They and their families are entitled to understanding, supportive, inspiring and caring environment. This competition is about the light and hope. It is about love, the joy of life, and human victory over diseases. We hope that the artworks will provide strength to people in sorrow and promote their resistance to the disease.” The Foundation, in collaboration with art experts, therapists and other professionals of the field, plan to create an artwork collection of the most highly regarded works submitted for the competition that, along with the high artistic value, are also able to support patients emotionally and motivate them in their struggle with the disease. The artworks submitted for the competition will be exhibited at the oncology patient recovery facilities and published at the Foundation website. Every year, three best works will be awarded with the main awards of 4000 EUR, 2000 EUR and 1000 EUR. Incentive bonuses and special recognition awards may also be granted every month. The competition jury includes Mr. Einars Repše, Head of Aina Muceniece Virotherapy Foundation, Mr. Aleksejs Naumovs, Professor and painter, rector of the Art Academy of Latvia, Mr. Ojārs Spārītis, Professor, President of the Latvian Academy of Sciences, Mrs. Māra Lāce, Director of the Latvian National Museum of Art; Mr. Kristaps Zariņš, Professor and painter, Pro-rector of the Art Academy of Latvia; Mr. Gļebs Panteļejevs, Professor of the Art Academy of Latvia, sculptor, and Mrs. Sanita Ciganovska, art therapist. More information on the competition and application procedure is available at the Foundation’s website www.virotherapyfoundation.org, Section “Art Contest.” Riga, Latvia, May 02, 2017 --( PR.com )-- Aina Muceniece Virotherapy Foundation hereby announces an international artwork competition, within the framework of which any professional, emerging artist or enthusiast without any age, professional or educational requirements is invited to submit their newly created artwork dedicated to the struggle with oncological disease or victory over it.The competition aims to support oncology patients and their relatives through art, call to resist the severe diagnosis, and promote the joy of living and recovery. The competition is open to any art lover around the world and artworks are especially welcome from those who have been able to defeat cancer. The slogan of the competition is – Art wins!The Head of the Foundation, Mr. Einars Repše commented: “Oncology patients are entitled to the quality of life even during the toughest stages of their treatment. They and their families are entitled to understanding, supportive, inspiring and caring environment. This competition is about the light and hope. It is about love, the joy of life, and human victory over diseases. We hope that the artworks will provide strength to people in sorrow and promote their resistance to the disease.”The Foundation, in collaboration with art experts, therapists and other professionals of the field, plan to create an artwork collection of the most highly regarded works submitted for the competition that, along with the high artistic value, are also able to support patients emotionally and motivate them in their struggle with the disease.The artworks submitted for the competition will be exhibited at the oncology patient recovery facilities and published at the Foundation website. Every year, three best works will be awarded with the main awards of 4000 EUR, 2000 EUR and 1000 EUR. Incentive bonuses and special recognition awards may also be granted every month.The competition jury includes Mr. Einars Repše, Head of Aina Muceniece Virotherapy Foundation, Mr. Aleksejs Naumovs, Professor and painter, rector of the Art Academy of Latvia, Mr. Ojārs Spārītis, Professor, President of the Latvian Academy of Sciences, Mrs. Māra Lāce, Director of the Latvian National Museum of Art; Mr. Kristaps Zariņš, Professor and painter, Pro-rector of the Art Academy of Latvia; Mr. Gļebs Panteļejevs, Professor of the Art Academy of Latvia, sculptor, and Mrs. Sanita Ciganovska, art therapist.More information on the competition and application procedure is available at the Foundation’s website www.virotherapyfoundation.org, Section “Art Contest.” Click here to view the list of recent Press Releases from Aina Muceniece Virotherapy Foundation


Zilgalvis J.,Latvian Academy of Sciences
Landscape Architecture and Art | Year: 2016

The architectural heritage of every site is of value, whether it is a well-known tourist destination or a less known site. But an in-depth study often draws attention to sites that have not previously been well-known and, thus, over time they are brought to light as long forgotten pearls.


Kangro L.,Rezekne Academy of Technologies | Kalis H.,Latvian Academy of Sciences | Teirumnieka E.,Rezekne Academy of Technologies | Teirumnieks E.,Rezekne Academy of Technologies
Vide. Tehnologija. Resursi - Environment, Technology, Resources | Year: 2017

In this paper we study diffusion and convection filtration problem of one substance through the pores of a porous material which may absorb and immobilize some of the diffusing substances. As an example we consider round cylinder with filtration process in the axial direction. The cylinder is filled with sorbent i.e. absorbent material that passed through dirty water or liquid solutions. We can derive the system of two partial differential equations (PDEs). One equation is expressing the rate of change of concentration of water in the pores of the sorbent and the other - the rate of change of concentration in the sorbent or kinetically equation for absorption. The approximation of corresponding initial boundary value problem of the system of PDEs is based on the conservative averaging method (CAM). This procedure allows reducing the 2-D axis-symmetrical mass transfer problem described by a system of PDEs to initial value problem for a system of ordinary differential equations (ODEs) of the first order. © Rezekne Academy of Technologies, Rezekne 2017.


Bervalds E.,Latvian Academy of Sciences | Dobelis M.,Riga Technical University
IMETI 2010 - 3rd International Multi-Conference on Engineering and Technological Innovation, Proceedings | Year: 2010

This paper proposes a generally new type of macro and megaspace filling honeycombs having quasiregular pentahedral cells with skew hexagonal faces. An existence of spatial cells named pentahedra is demonstrated by topological transformations of hexagonal prismatic honeycomb and is based on a recently discovered Phi relationship within a regular hexagonal tessellation. A geometric symmetry of this honeycomb is studied, filling the space with no gaps or overlaps. Finally it is pointed out that abstract or skeletal analogues of pentahedral honeycomb have effective practical uses by synthesis of artificial man-made macromedium, especially the like of orbital large scale structural systems.


Spalvis K.,Latvian State Forestry Research Institute Silava | Daugaviete M.,Latvian State Forestry Research Institute Silava | Platace R.,Latvian Academy of Sciences | Daugavietis U.,Latvian State Forestry Research Institute Silava
International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM | Year: 2014

In the northern hemisphere Norway spruce (Picea abies Karst.) as one of the most productive and fast-growing conifer species has long been cultivated over vast areas. According to the literature data the spruce plantations in Europe take up some 6 to 7 million hectares. In the territory of present-day Latvia pure stands of spruce were established in woodlands already in the 19th century. Starting with the 1980s, spruce plantations for short rotation cultivation (till the age of 40 years) were on a larger scale established also in abandoned agricultural lands. Between 2000 and 2012, the area under similar plantations has reached 28,700ha. At first commercial thinnings at the age of 15 years the number of trees in the plantations is normally reduced to 1,500 stems•ha-1. In such a situation the major challenge is how to utilize the biomass thinned out. In the given study we have investigated the structure and amount of woody biomass that may be recovered in thinning 15-year pure stands of spruce. According to the field data, the weight of above-ground biomass of one tree in 15-year pure stands of spruce is on average 142.9kg (100%), of which stemwood makes 65.7 kg (46.0%) and tree foliage 76.9kg (53.9%), respectively. The biomass of green branches comprises the fraction of needles (38.1 kg or 49.5%) and young shoots (7.2kg or 9.4%), which in biomass studies is known as tree foliage. In 21 to 25-year pure stands of spruce the above-ground biomass of one tree weighs on average 372kg (100%), of which stemwood is 244.5 kg (65.7%) and tree foliage 117kg (31.5%), respectively In similar spruce plantations the number of trees removed in the first commercial thinnings is 1,210 trees ha-1 with the yield of pulpwood 27.1m3ha-1, or stem biomass 21.5t ha-1, and tree foliage 17.8t ha-1. When thinning 21to 25-year plantations, on average 877 trees ha-1 are thinned out, with the yield of pulpwood 109m3ha-1, or stem biomass 86.3t ha-1, and tree foliage 21.6t ha-1. The profit calculations, when utilizing also tree foliage, show that in thinning 15 to16-year spruce plantations the gross profit is 1.8 times higher, compared to the case when only pulpwood is utilized. For 21 to 25- year plantations this increase in gross profit is 1.2 times higher compared to utilizing pulpwood alone. © 2014, SGEM. All Rights Reserved.


Varlamova E.V.,Kazan Federal University | Naciscione A.,Latvian Academy of Sciences | Tulusina E.A.,Kazan Federal University
International Journal of Environmental and Science Education | Year: 2016

Relevance of the issue stated in the article is determined by the fact that there is a lack of research devoted to the methods of teaching English and German collocations. The aim of our work is to determine methods of teaching English and German collocations to Russian university students studying foreign languages through experimental testing. The result of our study is to create a classification of collocations teaching methods. In our study we follow the broadside approach in respect of the volume of collocations applying the terminology of foreign and Russian linguists. A model of effective methods of teaching collocations to junior language students has been introduced, by using the modelling method. Collocations with a complicated semantic structure cannot be understood without some special knowledge and require, as a result, special methods of teaching. The models of exercises suggested can be used effectively by first-year students at German and English classes. © Author(s).


Teirumnieka E.,Rezekne Higher Education Institute | Kangro I.,Rezekne Higher Education Institute | Teirumnieks E.,Rezekne Higher Education Institute | Kalis H.,Latvian Academy of Sciences
Vide. Tehnologija. Resursi - Environment, Technology, Resources | Year: 2015

In this paper we consider averaging methods for solving the 3-D boundary value problem in domain containing 2 layers of the peat block. We consider the metal concentration in the peat blocks. Using experimental data the mathematical model for calculation of concentration of metal in different points in every peat layer is developed. A specific feature of these problems is that it is necessary to solve the 3-D boundary-value problems for elliptic type partial differential equations of second order with piece-wise diffusion coefficients in every direction and peat layers. The special parabolic and exponential spline, which interpolation middle integral values of piece-wise smooth function, are considered. With the help of this splines is reduce the problems of mathematical physics in 3-D with piece-wise coefficients to respect one coordinate to problems for system of equations in 2-D. This procedure allows reduce the 3-D problem to a problem of 2-D and 1-D problems and the solution of the approximated problem is obtained analytically. The solution of corresponding averaged 2-D initial-boundary value problem is obtained also numerically, using for approach differential equations the discretization in space applying the central differences. The approximation of the 2-D non-stationary problem is based on the implicit finitedifference and alternating direction (ADI) methods. The numerical solution is compared with the analytical solution. © Rezekne Higher Education Institution (Rēzeknes Augstskola), Rezekne 2015.


Platace R.,Latvian Academy of Sciences | Adamovics A.,Latvian Academy of Sciences | Gulbe I.,Latvian Academy of Sciences
Engineering for Rural Development | Year: 2013

Production of pellets requires herbaceous biomass with low moisture and ash content, good combustion ability and ash melting temperature ensuring high-quality performance of the boiler. The research aims at analysing various parameters of reed canary grass (Phalaris arundinacea L.) biomass depending on the harvest (spring and autumn) and determining their suitability for the heat production in Latvia. Moisture and ash content was found out, as well as the highest and the lowest calorific values and ash melting temperatures within various phases. The average moisture indicators of reed canary grass spring harvest comprised 9.85 % and 17 % of fall harvest. Spring-harvest reed canary grass biomass ash content accounted for 3.10 %, whereas in the autumn harvest - 4.65 %. The highest and the lowest calorific value of spring-harvest reed canary grass biomass constituted 18.42 MJ·kg-1 and 15.27 MJ·kg-1, respectively, while of the fall harvest - 15.24 MJ·kg-1 and 13.82 MJ·kg-1, correspondingly. Ash melting temperature at the beginning of the deformation phase on average reaches 1170 °C for the spring-harvest reed canary grass biomass and 1295 °C for the autumn biomass. Acquired results show that reed canary grass biomass harvested in spring is more suitable for the heat production, as compared to autumn samples. Whereas ash melting temperatures are slightly higher for fall-harvest samples, still samples harvested in spring are suitable for heat production.


Platace R.,Latvian Academy of Sciences | Adamovics A.,Latvian Academy of Sciences | Gulbe I.,Latvian Academy of Sciences
Engineering for Rural Development | Year: 2013

Use of the crop biomass in the energy production is one of the preconditions to avoid ecological disasters in future and to compensate growing shortage of fossil energy sources. Ash is the non-combustible component of biomass, and high content thereof leads to fouling problems. Biomass fuels tend to have high ash and potassium content, and as a result ash melts at lower temperatures and leads to dross that can obstruct furnace elements and cause their damage. Pellets prepared within the research had different proportions (1/3, 1/1, 3/1) of reed canary grass variety "Marathon" and energy wood-osier. The research indicated the lowest potassium content (0.34 %) in osier biomass, while the highest (0.67 %)-in reed canary grass biomass. When osier is added to the reed canary grass pellets the potassium content rises. The lowest potassium content was observed in pellets having biomass proportion 1/3-it is the most suitable for the pellet production. As compared to the pellets made solely from osier, the potassium content in pellets made from reed canary grass /osier in mentioned proportion increased by 24.75 % and combustion ability decreased by 0.09 %. The aim of the study was evaluation of factors influencing potassium content in energy crop pellets.


Platace R.,Latvian Academy of Sciences | Adamovics A.,Latvian Academy of Sciences | Gulbe I.,Latvian Academy of Sciences
International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM | Year: 2013

Use of the crop biomass in the energy production is one of the preconditions to avoid ecological disasters in future and to compensate growing shortage of fossil energy sources. Ash is the non-combustible component of biomass, and high content thereof leads to fouling problems. Biomass fuels tend to have high ash and potassium contents; as a result, ash melts at lower temperatures and leads to dross that can obstruct furnace elements and cause their damage. The aim of the study was evaluation of factors influencing potassium content in energy crop pellets. Pellets prepared within the research had different proportions (1/3, 1/1, 3/1) of reed canary grass (RCG) variety'Marathon' and energy wood - poplar. The research resulted in finding potassium content in RCG and poplar pellets, correlations with lignin content, combustion ability and ash content, as well as in suggestions on optimum biomass content and proportions for the pellet production. © SGEM2013 All Rights Reserved by the International Multidisciplinary Scientific GeoConference SGEM.

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