Influence of chemical additives and alkaline conditions on properties of lime-based injection grouts with dolomite powder

This diploma thesis researches the influence of alkaline conditions and chemical admixtures, such as\ud superplasticizers PCE and PPh, on properties of lime-based injection grouts with dolomite filler.\ud Samples (bars) were prepared and exposed to different ageing conditions. At first, the samples were\ud exposed to room temperature for a 1-month period, after that the bars were exposed for 3 months to\ud accelerated conditions in a solution of 1M NaOH and at the temperature of 60°C.\ud The tests were undertaken on fresh and hardened grouts. On fresh grouts the test of fluidity was\ud carried out, while on hardened bars the changes in weight and volume were measured, and flexural\ud and compressive tests were conducted. Furthermore, the influence of glycerol carbonate on\ud carbonation of the lime binder was also investigated

Mine surveillance measurements during the building of NOP II shaft

The Velenje Coal Mine is building a new shaft NOP II for the \ud transportation of coal from the mine. The entrance of the shaft, \ud which is determined on the surface, and the bottom of the \ud shaft, which is expected in the point determined at the bottom \ud of the shaft, must be within the same vertical and horizontal \ud coordinate system. The starting points for the measurements \ud are the points determined on the surface, which are stable \ud or have a determined direction and velocity. The transfer of \ud the coordinate system from the surface into the shaft can be \ud carried out with the measurements using various methods. \ud The results of the measurements and the calculations are the \ud coordinate points in the shaft that are in the same coordinate \ud system as those on the surface. They are very suitable for the \ud determination of the designed NOP II shaft. At the beginning \ud of this task, we planned to determine the coordinates of the \ud starting points with a maximum precision. Based on the \ud results of an analysis, we can conclude that we performed \ud each phase of the work very well and achieved the tasks set

Determination of position quality by RTK-GNSS method using different occupation durations

In this graduation thesis we have checked the quality of RTK-point positioning in the coordinate\ud system ETRS89 with various occupation durations. The occupation durations were related to the\ud interval from 5 seconds and up to 5 minutes after the successful initialization. The process of\ud identifying differences has been performed similar to the methodology of RTK-instrument testing\ud according to the standard ISO17123-8. First we have established a three-point network at the area of\ud Trbovlje and further performed static GNSS measurements. By several different post-processing\ud strategies we have acquired coordinates that were used as the reference for further studies. We have\ud used observations from three permanent stations of the national continuously operating reference\ud station network SIGNAL, i.e. Trebnje, Celje, Ljubljana and finally also VRS station to acquire final\ud coordinates from post-processing. Meanwhile we have tried to find out the minimal occupation\ud duration for quality baseline determination from fast-static measurements. Positions of the three points\ud were determined using Leica 900 instrument for RTK-method performance. Positions were\ud determined by several independent initializations and by different occupation durations. We have\ud found that in the case of the instrument Leica 900 there are no significant differences between\ud positions of detail points, acquired from different occupation durations after the initialization

Sprejem in uporaba lokalnih letalskih meritev pri napovedovanju vremena

etala med letom neprestano merijo zraËni tlak in temperaturo ter izraËunavajo veter. Ti podatki so zelo uporabni za spremljanje in napovedovanje vremena. V sedemdesetih letih preteklega stoletja se je zaËelo organizirano zbiranje teh podatkov s pomoËjo radijskih in satelitskih povezav pod okriljem Svetovne meteoroloπke organizacije, ki pa je æal omejeno na nekaj letalskih druæb. S pojavom radarjev nove generacije Mode-S se je od- prla moænost zajema meteoroloπkih podatkov prek radarjev. V Sloveniji smo prvi vzpostavili pot prenosa teh meritev z letal prek radarjev Mode-S do meteoroloπke sluæbe. Primerjave kaæejo, da so meritve v povpreËju zelo kakovostne in imajo pozitiven vpliv na kratkoroËno vremensko napoved. Opisani naËin pridobivanja in sprejema meteoroloπkih meritev prek radarjev Mode-S ter izmenjave podatkov je vzorËen, a za zdaj v svetu veËinoma neizkoriπËen primer moænosti uËinkovitega sodelovanja upravljavcev letalskih radarjev in meteoroloπkih sluæb. Naπo izkuπnjo promoviramo v med- narodnih institucijah, saj menimo, da ima velik potencial za izboljπave napovedi vremena in varnosti letalskega prometa v svetovnem merilu

Measurements and Analysis of Intercepted Precipitation of Silver Birch (Betula pendula Roth.) and Scots Pine (Pinus sylvestris L.) in Urban Area

Study presents measurements, comparation and analysis of intercepted precipitation of\ud coniferous and deciduous trees. Measurements were made on experimental plot in the urban\ud part of the city Ljubljana on two groups of trees: Betula pendula and Pinus sylvestris.\ud Analyses and comparations of throughfall and stemflow were made for the period from June\ud 2004 till December 2006 which was devided onto four vegetation periods. Rainfall above the\ud canopy was measured automatically with a tipping bucket rain gauge with digital recording of\ud results every 10 minutes in combination with manual Helman's rain gauge for control.\ud Throughfall was measured using a combination of fixed gauges with digital recording of\ud results every 10 minutes and manual roving gauges. Stemflow was measured manually on one\ud tree of each specie. The results of the measurements showed that the throughfall for Betula\ud pendula was 57-70 % of precipitation and for Pinus sylvestris 35-49 % which is comparable\ud with the results of other similar studies around the world. The stemflow fraction for Betula\ud pendula amounted 1,1-6,7 % of precipitation and it was practically negligible for Pinus\ud sylvestris

Establishment of web interface for tensiomiography measurements display

The purpose of this thesis was to develop a solution to display tensiomyographic measurements. The web application enables the user to access the measurement data stored in the cloud database. The open source Laravel framework written in the PHP programming language was used for developing the web interface. The architecture of the whole system and the web app user interface are introduced in more details. The main app functionalities and the way of using the web interface are also described. While building the web application based on the Laravel framework, useful experiences were gained

Creation of a 3D-model wall front using a videotacheometer Topcon GPT-7003i and software produced by Topcon

This diploma thesis contains a practical review of the creation of a 3D-model wall front, from preparing data to its realization. The main feature of this task is the use of a videotacheometer Topcon GPT-7003i and software produced by Topcon (TopSURV, Topcon Link, PI-Calib, PI- 3000). The main purpose was to collect all necessary data in order to create a 3D model, exclusively using the videotacheometer GPT-7003i. It came to the acknowledgement that the sensor of the instrument does not assure enough quality images, so Nikon D70 camera was used instead. The measurements with this instrument are made in the TopSURV software program, which is loaded on the videotacheometer’s internal disk. This program provides coordinates and measurements, which can be exported to the Topcon Link software on the personal computer. Topcon Link allows corrections and adjustments and exports those measurements to other formats. Pi-Calib is a simple software for implementing camera calibration - interior orientation of the camera. The creation of the 3D model is carried out in the PI-3000 software. After importing the data (control points, check points and images) in this software, the first task is to conduct the exterior orientation of the stereopairs. Then the depth of the points needs to be measured and the borders on the places where the depth of the model has changed have to be determined with polygons. The next task is to create a TIN and texture of the model. The final product is a 3D model of the wall front, the evaluation of the practicability of the software used and the instructions for using this software. VI

Geodesy in Geotechnics\ud

Geodetic methods are one of the possible means of determining the stability of geotechnical objects. The determination of the displacements of the geotechnical objects is specific due to the size and the expected displacements. The expected size of the displacement determines the necessary precision of the displacement determination, whereas the size of the object determines the method of the geodetic measurement. We choose either the terrestrical or the GNSS methods. There is no relevant legal framework for geotechnical measurements. For this reason, we present the characteristics of the single methods and suggest general recommendations regarding the implementation of the geodetic procedures when monitoring the displacements of the geotechnical objects. The recommendations are intended for geotechnical engineers planning the geotechnical objects and the operators of geodetic measurements and investors. The recommendations the facilitate supervision of the geotechnical projects

Measurement and modelling of process impacts of substrates and filter media to the operation of wastewater treatment plants with fixed biomass

Substrates and filter media are built in wastewater treatment plants in various ways, and can have a high impact on their operation effect. As such, they can either only intensify the treatment processes, or they can act as a main treatment carrier. The specific treatment effects, which can be achieved by substrates or filter media application, were until now rarely exploited in the wastewater treatment plants design. The usual reason for this was insufficient knowledge about these materials as well as the high costs of membrane filtration technology. Especially interesting are those technological solutions that use the biological treatment processes in a combination with various substrates and filter media. This can be also seen from the research results provided in this paper. The relatively easy removal of phosphorus and heavy metals from the wastewater, via suitable substrates, can, for example, take place in the percolators and constructed wetlands. It was found that some substrate types provide much more suitable conditions for the development of bacterial communities than others. If the membrane filter is included into the treatment process, then the treatment efficiency of the wastewater treatment plant can be significantly improved, although its size remains the same. Using these techniques, relatively easy removal of viruses, bacteria, and some heavy metals can also be achieved