Projecting Pulp Mill Impact on the Infrastructure of Jekabpils Region

This paper deals with possible impact of potential pulp mill in Jekabpils on adjacent regions infrastructure, which includes inhabitant’s comfort level, and business infrastructure during construction and processing stages. The analysis is made up on the basis of several publications, which are connected with environmental impact assessment, regional development and pulp mill project materials. There are analysis of several kinds of impact: on geology, water and air pollution and their limitation, noise pollution, demography, cultural resources. For better understanding of business perspectives a comparison is made with similar pulp mill in Rauma (Finland) and its impact. On this basis SWOT analysis and matrix is made. The main conclusions are: there is big possibility of positive changes in region development through so large investment, main problems in pollution are connected with possible thermal pollution, serious attention needs to be paid for future for small sawmill and private forest management

Qualitative Development of Construction Student’s Attitude in Ecological Teaching and Learning Process

The publication reflects the qualitative development of construction students' ecological attitude in learning and teaching process in a vocational school. By facilitating the teaching and learning process, developing the content of education, introducing in teaching ecologically-oriented forms of work, methods, approaches and instruments; using the environment as a pedagogical tool and highlighting the important role of teacher as an ecological person in the accentuation of teaching content as students understand it. The author emphasizes the impact of the components of ecological education in the promotion of the reflection on the most essential attitude criteria – knowledge, skills and behaviour. Applying quantitative and qualitative research, the author sums up the experimantally obtained results showing that by the introduction of the components of ecological education, it is possible to foster the development of an ecological person

Promocijas darbs

Elektroniskā versija nesatur pielikumusPromocijas darbs veltīts tumšo un gaišo magnetooptisko rezonanšu eksperimentālai izpētei. Izmantojot eksperimentālos rezultātus D2 līnijas pārejām 85Rb un 87Rb, pirmo reizi izskaidrota gaišās magnetooptiskās rezonanses pārvēršanās par tumšo, mainoties lāzera jaudas blīvumam pie fiksētas lāzera frekvences. Izmantojot eksperimentālos rezultātus, kas iegūti lietojot ļoti plāno šūnu un Cs D1 līnijas pārejas, uzlabots sadursmju relaksāciju un caurlidošanas relaksācijas apraksts. Izmantojot ļoti plāno šūnu un Cs D 1 līnijas pārejas, izveidota portatīva un lietotājam draudzīga magnētiskā lauka gradienta mērīšanas iekārta, kas spēj nodrošināt magnētiskā lauka mērījumus ar 500 nm telpisko izšķirtspēju.Izmantojot pumpējoša un zondējoša lāzeru kombināciju, tika nodemonstrēts, kā ar magnetooptisko rezonanšu palīdzību tieši pētīt lāzeru inducētās fluorescences telpisko sadalījumu intensīvā lāzera starā ar Gausa jaudas sadalījuma profilu.This thesis is dedicated to experimental studies of dark and bright magneto-optical resonances. By using experimental data acquired on transitions of the D2 line of 85 Rb and 87 Rb, the conversion of bright magneto-optical resonance into dark resonances as a result of changing the laser power density of the exciting radiation at fixed laser frequency was explained for the first time. By using experimental data acquired from anextremely thin cell andthe Cs D1 line transitions, the theoretical description of collision relaxation and fly-through relaxation was improved. By using anextremely thin cell and the Cs D1 line transitions, a portable and user-friendly device for magnetic field gradient measurements with 500 nm spatial resolution was constructed. By using a combination of pump and probe lasers, a direct way to measure the fluorescence distribution in an intense laser beam with a Gaussian power distribution profile using magneto-optical resonances was demonstrate

Promocijas darbs

Elektroniskā versija nesatur pielikumusPromocijas darbs veltīts tumšo un gaišo magnetooptisko rezonanšu eksperimentālai izpētei. Izmantojot eksperimentālos rezultātus D2 līnijas pārejām 85Rb un 87Rb, pirmo reizi izskaidrota gaišās magnetooptiskās rezonanses pārvēršanās par tumšo, mainoties lāzera jaudas blīvumam pie fiksētas lāzera frekvences. Izmantojot eksperimentālos rezultātus, kas iegūti lietojot ļoti plāno šūnu un Cs D1 līnijas pārejas, uzlabots sadursmju relaksāciju un caurlidošanas relaksācijas apraksts. Izmantojot ļoti plāno šūnu un Cs D 1 līnijas pārejas, izveidota portatīva un lietotājam draudzīga magnētiskā lauka gradienta mērīšanas iekārta, kas spēj nodrošināt magnētiskā lauka mērījumus ar 500 nm telpisko izšķirtspēju.Izmantojot pumpējoša un zondējoša lāzeru kombināciju, tika nodemonstrēts, kā ar magnetooptisko rezonanšu palīdzību tieši pētīt lāzeru inducētās fluorescences telpisko sadalījumu intensīvā lāzera starā ar Gausa jaudas sadalījuma profilu.This thesis is dedicated to experimental studies of dark and bright magneto-optical resonances. By using experimental data acquired on transitions of the D2 line of 85 Rb and 87 Rb, the conversion of bright magneto-optical resonance into dark resonances as a result of changing the laser power density of the exciting radiation at fixed laser frequency was explained for the first time. By using experimental data acquired from anextremely thin cell andthe Cs D1 line transitions, the theoretical description of collision relaxation and fly-through relaxation was improved. By using anextremely thin cell and the Cs D1 line transitions, a portable and user-friendly device for magnetic field gradient measurements with 500 nm spatial resolution was constructed. By using a combination of pump and probe lasers, a direct way to measure the fluorescence distribution in an intense laser beam with a Gaussian power distribution profile using magneto-optical resonances was demonstrate

INVASION OF INFORMATION SYSTEMS AS A DANGER FOR HUMAN RIGHTS

In recent years, more and more people have been pushed to direct usage of various information systems (IS) developed by governmental, commercial, municipal, and non-governmental organisations. IS were widely used already for a relatively long time – 2 or 3 decades (depending of state), however, people were not pushed to use them directly, they were used by staff members of organisations, so for clients it does not made a difference, do they use an IS or, for example, a paper folder or a file cabinet. Now people are increasingly required to use ISs directly, which makes the process more challenging and potentially dangerous. This article aims to analyse this situation and these processes, trying to classify risks, draw conclusions and provide recommendations.

A Simplified Approach to Estimate Anchoring Capacity of Blocky Rock Mass with Pressure Arch Theory

In this paper, a simplified method for predicting rock mass resistance against tensile forces from rock anchors (anchor) is presented. The interaction of anchors and rock mass was investigated using three-dimensional discontinuous numerical modelling. Several patterns of rock discontinuities were assumed in the numerical modelling while a single anchor is embedded in it. The numerical results show that the existence of a discontinuity set sub-parallel to the anchor significantly improves the rock mass resistance against the tensile force from the anchors. This phenomenon is due to the rock block interlocking at the sub-parallel discontinuity set. Rock block interlocking generates a zone of stress concentration inside the rock mass which has an arch shape (i.e., a pressure arch), resisting against the anchor's tensile force. The load-bearing capacity of the pressure arch plays a significant role in the resistance of the rock mass against the forces from the rock anchor. A voussoir beam analogy was utilised to study the load-bearing capacity of the pressure arch. A simplified analytical approach was developed to assess the load-bearing capacity of the voussoir beams. Then, it was used in combination with the weight of the mobilised rock mass by the anchor to assess the maximum anchoring resistance of the rock mass (anchoring capacity). The suggested method was calibrated by numerical modelling and relevant published pull-out test results. The technique developed in this paper shows the significance of rock block size, shear behaviour of rock discontinuities, Young's modulus of the rock mass, and uniaxial compressive and tensile strength of the intact rock in anchoring capacity of rock masses.publishedVersio

Dynamics of ethnic structures in the Baltic States

The aim of this article is to present changes in the three Baltic States (Estonia, Latvia and Lithuania) and to analyse the demographic developments of the titular ethnicities and ethnic minorities. In all censuses carried out in the Baltics, including the 2000-2001 and 2011 censuses, respondents were asked to name their ethnic identity. This gave basic information for study of ethnic composition and the characteristics of ethnic Estonians, Latvians and Lithuanians and other ethnic groups living in the Baltics. The article reports from study of ethnic developments since the regained political independence in the beginning of the 1990s and more detailed in the last decade. A sudden reversal of migration and natural reproduction processes changed the population proportion of titular ethnicities, Slavs and other minorities. In the 1990s and the beginning of this century the total number of population of ethnic Estonians, Latvians and Lithuanians has decreased; however, the proportion of titular ethnicities has increased. The Baltic States have one of the highest population loss indicators in the world. The excess of deaths over births has been since 1991, and emigration is strongly prevailing in international migration processes, particularly among minorities. However, even now minorities constitute one- fourth of the total in the Baltic population (in Latvia 38%, in the capital city Riga 54%). The age structure of minorities is relatively older than the structure of the titular ethnicities. The largest minorities by size are Russians, Poles (the greater majority of them reside in Lithuania), Belarussians and Ukrainians

Solid-state NMR and computational investigation of solvent molecule arrangement and dynamics in isostructural solvates of droperidol

13C, 15N and 2H solid-state NMR spectroscopy have been used to rationalize arrangement and dynamics of solvent molecules in a set of isostructural solvates of droperidol. The solvent molecules are determined to be dynamically disordered in the methanol and ethanol solvates, while they are ordered in the acetonitrile and nitromethane solvates. 2H NMR spectra of deuterium-labelled samples allowed the characterization of the solvent molecule dynamics in the alcohol solvates and the non-stoichiometric hydrate. The likely motion of the alcohol molecules is rapid libration within a site, plus occasional exchange into an equivalent site related by the inversion symmetry, while the water molecules are more strongly disordered. DFT calculations strongly suggest that the differences in dynamics between the solvates are related to differences in the energetic penalty for reversing the orientation of a solvent molecule

International migration in the periods of transition and crisis: the case of Latvia

Migration processes are amongst the most relevant issues in the geography of the Baltic States. The authors analyse the changes in migration patterns from the early 1990s until today. The focus of the study is the recent trends of migratory movements in the case of Latvia. Due to the country's economic recession, migration has accelerated in the recent years. Empirical results show the response of the migration system to the changing internal factors and external influences in the times of transition and global crisis. Long-term emigration exacerbates the problem of demographic change in Latvia

THE IMPACT OF UNREGULATED FACTOR INFLUENCE ON WINTER WHEAT GROWTH AND DEVELOPMENT

The modern meaning of accurate crop cultivation is closely associated with the new information technologies - geographic information and global positioning systems. Latvia has not published the results of research on soil conditions and the impact of unregulated factors of production conditions on winter wheat growth and yield. Analysis of results of studies aimed to clarify the difference of soil treatment facilities, as the criteria for the treatment of soil using soil characterizing Non-plant growth and development factors. Investigations were carried out in 2005 – 2007 on the production plantations of the Kurpnieki field, the Vecauce Study and Research Farm of the Latvia University of Agriculture. The results, while on a previous year, research on soil management measures to optimize the opportunities associated with global positioning systems, precision field management implementation practice shows that in order to obtain objective indicators and to gain the desired results, it was not enough for one season observation, since a large role in shaping the harvest is the meteorological conditions during the growing period. Unregulated factors: organic matter content, Ap horizon thickness, as well as the relative height above sea-level properties of materials research is the prerequisite for geographic information system-based resource-saving cultivation technology field-crop cultivation