The aim of the research – to investigate and evaluate the criteria for water use and reuse, and to develop a model for effective management of water resources in industry.

The objective is to develop river basin management model that ensures integrated analysis of existing water resource problems and promotes implementation of sustainable development principles in water resources management.

Magistro baigiamojo darbo tikslas – išanalizuoti Šešupės tvenkinio būklės situaciją ir būklės gerinimo kryptis, bei ištirti investicinių projektų galimybes vandens telkinio būklei pagerinti. Šiame darbe yra nagrinėjama Šešupės tvenkinio aplinkosauginė būklė ir tiriamos investicinių projektų galimybės Šešupės tvenkinio būklei pagerinti. Tyrimai atlikti Šešupės tvenkinyje 2012 metais gegužės ir spalio mėn. Imti mėginiai vandens tyrimams iš trijų skirtingų vietų ir išanalizuoti aplinkotyros laboratorijoje. Atliekant vandens cheminės būklės tyrimus analizuoti šie vandens būklės rodikliai: PO-P4, Skendinčios medžiagos, Permanganato indeksas, Pb, pH, O2, N-NH4, N-NO2, N-NO3, Nb, BDS7. Tyrimams panaudoti duomenys gauti prieš tvenkinio tvarkymą ir prasidėjus rekonstrukcijai. Tyrimų metu nustatyta, kad vandens cheminė būklė ženkliai nepakito. Didžiausi vandens cheminės būklės pakitimai rasti nustatant bendrą azotą, kuris parodo vandens būklės pablogėjimą. Išaiškintos priežastys, dėl kurių atsirado vandens cheminės būklės pakitimai. Taip pat buvo nagrinėjamas geriausio scenarijaus pasirinkimas alternatyvų analizės būdu. Šiame projekte geriausias sprendimas pasirenkamas atlikus daugiakriterinę alternatyvų analizę. / The aim of this master's final paper is to analyze the condition of the Šešupė pond and the directions for improvement of this condition and also to study the possibility to implement investment projects for improvement of the condition of the pond. This paper analyzes the environmental condition of the Šešupė pond and studies the possibility to implement investment projects for improvement of the condition of the Šešupė pond. Analyses were conducted in the Šešupė pond during the period from May to October 2012. Water samples for the analyses were collected at three different places of the pond and analyzed in an environmental science laboratory. The analysis of water chemical status included the following water status indicators: PO-P4, materials in suspension, permanganate index, Pb, pH, O2, N-NH4, N-NO2, N-NO3, Nb, BDS7. Data used for the analyses were obtained before reconstruction of the pond and at the beginning of reconstruction. The analysis has shown that the water chemical status has not changed significantly. The most significant changes of the water chemical status were found during the analysis of total nitrogen which is the indicator of water status deterioration. The reasons of the changes of the water chemical status were clarified. Also I have studied the selection of the best scenario through the analysis of the alternatives. The best solution in this project is selected after multi-criteria analysis of the alternatives.

These days we all face with drinking water and not menace to human’s health water’s problem. There are the greater part of fresh water polluted in many countries of European Union (EU). Water is intensive use in energetic, in chemistry industry, in agriculture, and that’s why the flowing water of industrial establishment and agriculture mostly pollutes the rivers, lakes and the seas route of entry, unraveling natural biological cycle, natural environment of organisms, and they menace to human’s health and life. That’s why relevant and effective security of water resources protection is very important. Water protection policy has direct impact on human’s health and the quality of their life’s, thus, this sector falls among the priority fields in environmental protection policy. These days the main consideration is directed to the waist water’s treatment and to secure the quality of drinking water at the moment in Lithuania. The Republic of Lithuania has been participating in the EU waters protection policy. This is related to the important changes in water’s sector legal base, possibilities for funding the projects related to water����s pollution reduction, institutional structure and other aspects. In this master’s work the main attention was directed to the sponsorship analysis of the water sector because if it’s wanted to secure an effective waters’ resources, it’s needed sufficient sponsorship. While implementing one of the EU requests, its need to increase investments to... [to full text]

Darbe buvo koncentruojamasi ties eterinių aliejų tyrimais. Šie tyrimai yra aktualūs, nes nustatoma vis daugiau naudingų savybių, kurias turi junginiai esantys eteriniuose aliejuose. Kai kurie junginiai veikia įvairius neurotransmitorius, kai kurie virusus, o kai kurie netgi genus. Dėl šių priežasčių buvo atliekamas įvairių apynių ekstraktų tyrimas. Buvo tiriamos daugiau nei 20 veislių ekstraktų iš kurių žaliavos buvo gaminami trijų tipų ekstraktai: superkritinių skysčių pagalba gautas apynių spurgų ekstraktas, vandens distiliacijos būdu gautas ekstraktas ir apynių stiebų superkritinių skysčių ekstrakcijos pagalba gauti ekstraktai. Gautų ekstraktų komponenčių detekcija ir atpažinimas buvo vykdomas Shimadzu QP2010 DC-MS su autoinjektoriumi. / The composition of essential oil in hops depends mainly on hop variety and less on growing, processing and storage conditions. They can be used in medicine, brew and etc.. Essential oils can effect some neurotransmitors, viruses, gene, metabolism in many ways. That’s way is so important to research essential oils of hops. The research was concentrated on determination of components of essential oils were extract in two ways. We analized not only coins of hops, but also tried to detect essential oils in stem. Determination of compounds were execute using Shimadzu QP2010 GC-MS system with autoinjector. After that results of analysis were processed with statistical program. Assay didn’t surprised, but to reach good reliability hops needed not only researches of essential oils, but also and other material you can found in them.

Summary The sector of Communal service is an area there is still a lack of advanced technologies applications. One of such field – a control of counters data. There are only few technological decisions used in this field. Furthermore, the existing systems are quite expensive and not common in Lithuania. In this work the alternative decision is suggested by using only few components from more expensive systems. Created system allows to follow the water use, to normalize water supply, to check water use by distant way using the internet, to estimate the value of maximal water flow then in case of overfilling the water supply is automatically stopped (using to avoid results of accident). The system is created in this way: the water counter transmits data to a server, the data is stored in database. The counters of “Siemens” production are used, which can transfer data by distant way. The distant control flaps are used for the control of water supply. According to the created software the user can check last counter data, statistics, to stop and start water supply, to administrate the counter data and statistics from any place with internet. This software can be used not only by one user but by users groups as well, for example, house community. The software can be used in more fields. Using additional components, the program is suitable for the control of heating, gas and other resources.

Digital watermarking is the way to solve digital image copyright protection problem. Such a solution is quite new and the need for software, which would ensure image authentication, is huge. Image authentication control area and its relevance are analyzed in this work. Digital watermarking theoretical basics are presented; six algorithms – Cox, Kim, Wang, Xia, Dugad and Zhu – are analyzed. The analysis of similar software was performed; it revealed the predominance of such software products that allows only visible (though transparent) watermarking, and the number of software with a possibility of invisible watermarking is small. The work consists of these main parts: analysis, design, user documentation and experimental research. The main objective of this work was to design and implement image authentication control system. This system has such features: PGM and JPEG format images review, digital watermark generation, embedding, extraction.

Assessment of long term changes in levels of biogenic substances and their amount, with regard to water yield and intensity of anthropogenic activity, in the water of different hydrological areas of Lithuania. Comparative analysis of methods for calculation of biogenic substance flows. Establishment of possibility to reduce frequency of water sampling. ATV-DVWk water quality model was for the first time in Lithuania used for forecasting of the changes in the water quality in the longitudinal profile of a river.

Norint įvertinti vandens telkinio būklę, pakanka patyrinėti kurią nors gyvųjų organizmų grupę. Viena iš tokių indikatorinių sistematinių grupių yra titnagdumbliai (Bacillariophyceae). Dauguma tyrėjų teigia, kad titnagdumbliai yra idealūs indikatoriai biologiniam monitoringui, nes didelis skaičius ekologiškai jautrių rūšių tiek vandenyje, tiek nuosėdose, tiksliai nusako esamą ekologinę situaciją (Dixit et al. 1992). Aulacoseira granulata, Fragilaria crotonensis, Asterionella formosa, Cyclotella sp. Synedra sp. Rhizosolenia sp., Diatoma, Achnanthes, Cyclotella, Stephanodiscus dažnos mezotrofiniuose vandens telkiniuose. Stephanodiscus hantzschii intensyvus vystymasis vandens telkinyje yra aukšto trofiškumo rodiklis bei užterštumo organinėmis medžiagomis indikatorius. Apskritai, išskyrus Stephanodiscus sp., titnagdumbliai stipriai eutrofinių ir hipertrofinių sąlygų ežere nepakenčia. / As is well known as a better state of body water, the more species of living organisms can live in it, and the deterioration of water quality, with a consequent reduction in plant and soil or water surface the number of living species. It remains only for not demanding, resistant to water pollution types. So in order to assess the water situation, it is sufficient to explore any group of living organisms. One such indicator is the systematic group of diatoms (Bacillariophyceae). Aulacoseira granulata, Fragilaria crotonensis, Asterionella formosa, Cyclotella sp. Synedra sp. Rhizosolenia sp., Diatoma, Achnanthes, Cyclotella, Stephanodiscus common in mesotrophic waters. Intensive development of Stephanodiscus hantzschii in water body is a high trophic rate and contamination of organic matter indicator. In general, except for Stephanodiscus sp. diatoms can not stand strongly eutrophic and hypertrophic conditions in the lake.

Darbo aktualumas: Mokslinėje literatūroje pateikiama daug duomenų ir informacijos apie žuvų auginimo ypatumus žuvininkystės ūkiuose auginat žuvis pramoniniu būdu. Sodybiniai vandens telkiniai savo ruožtu įrengiami ir žuvys jose auginamos bei veisiamos šių telkinių savininkų nuožiūra. Trūksta mokslinių tyrimų ir metodinės literatūros analizuojančios sodybinių vandens telkinių įrengimo bei jų pritaikymo mėgėjiškos akvakultūros vystymui, problematiką, todėl ši sritis nusipelno išsamesnės mokslinės analizės. Darbo tikslas: Išanalizuoti sodybinių vandens telkinių įrengimo, jų priežiūros bei žuvų auginimo sodybiniuose vandens telkiniuose ypatumus. Darbo uždaviniai: 1. Apibrėžti dirbtinių vandens telkinių įrengimo teisinį reglamentavimą, atlikti sodybinių vandens telkinių įrengimo projektų vertinimą. 2. Aprašyti sodybiniuose vandens telkiniuose auginamas žuvų rūšis ir aptarti jų auginimo sodybiniuose vandens telkiniuose specifiką. 3. Atlikti vandens telkinių vandens fizinių savybių, cheminės sudėties ir mikrobiologinius tyrimus bei pateikti sodybinių vandens telkinių vandens kokybės vertinimą. 3. Nustatyti su sodybinių vandens telkinių priežiūra, žuvų veisimu ir auginimu susijusias problemas bei pateikti rekomendacijas problemų sprendimui. Išvados: 1. Tiriami sodybiniai vandens telkiniai įrengti pagal suderintus nesudėtingus vandens telkinių įrengimo projektus prisilaikant LR Aplinkos apsaugos įstatyto ir kitų teisės aktų reikalavimų. Sodybinių vandens telkinių įrengimo metu... [toliau žr. visą tekstą] / It is hard to imagine a Lithuanian country district with no pond. Recently the owners of the ponds more and more often select the homestead ponds which are well adapted to the amateurish fish breeding, growing and recreation. It is important, while setting such homestead ponds, to understand the biology of separate fish breeds and to realize the pond as individual and complex ecosystem. Homestead ponds and the water quality need to satisfy biological features of fish and to secure their wellness and nutritional quality. This demands a good knowledge and appropriate competency of the owners at such spheres as pond equipment, fish breeding, fish growing, fish additional feeding, evaluation of water quality and etc. Scientific literature supplies plenty of data and information about peculiarities of fish growing at the fishery farms where the fish are cultured in an industrial way. The homestead ponds are set and the fish are grown and bred at the discretion of the owners. This sphere deserves particular scientific analysis because of the lack of scientific investigations and methodological literature which analyzes the topic of pond equipment and adjustment for the development of amateurish aquaculture. The aim of this study is to analyze the peculiarities of pond equipment, observation and fish growing in the ponds. In order to reach the goal several tasks which include definition of the juridical regulation of pond equipment and evaluation of pond equipment projects were made... [to full text]