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Using interpolation techniques for predicting economic activities such as a movement of cyclist is always vitiated by an error. Therefore, this paper deals with the issue of understanding the error during modelling and compares different assessing criteria for choosing the most accurate method in order to decrease error propagation. The diagnostic of interpolation methods can be calculated with cross-validation approach. In case of kriging methods, we computed the estimated prediction standard errors and we examin...

Time series on quantities, areas harvested and yield average of key global crops in Bulgaria пїЅ wheat, maize, rise and soybean пїЅ are stored in multidimensional database. The developed software modules for statistical processing are embedded into database to give better operability than known software systems with Graphical User Interface. Time series on key global crops production in Bulgaria on national and regional level are studied for the period 2002-2015. Comparative data analysis on two sub-periods with t...

Constrained optimization problems are problems for which a function f (x) is to be minimized or maximized subject to constraints ? (x) . Here f : Rn ? R is called the objective function and F(x) is a Boolean-valued formula. In Mathematica the constraints ? (x) can be an arbitrary Boolean combination of equations g (x) ?0 , weak inequalities g (x) >=0, strict inequalities g(x)> 0, x is integer and x>0 statements. A point u ? Rn is said to be a global minimum of f subject to constraints F if u satisfies the constrai...

The paper deals with the fundamental rule of extensional logics, namely the rule of Existential Generalization. This rule can be applied in the situation when a function f is applied on its argument a to obtain the value of f at a. If the application does not fail, i.e., if the function f is defined at a, then we can existentially quantify, and derive that there is the value f(a). Our system is based on Transparent Intensional Logic (TIL). Since TIL is a hyperintensional, partial, typed lambda calculus, we examine...

The research presented in this article is concentrated on developing a series of instruments in order to include modular design in producing customized footwear for the elderly women. For those who live longer, it is important that they stay healthy, active and independent and, as a consequence, it reflects in the market growth of the industry producing goods for the elderly, the footwear industry as well. The loss of the ability to walk due to foot problem, not only produces physical limitations, but also has a s...

Geoinformation systems are widely used in many different areas of the humanities. Such systems allow to analyze, visualize historical geospatial information and what is more to support historical research processes in various situations. However an objective lack of the specialized GIS-analysis tools intended for historic, ethnographic and other research is tangible. Chronological tracking gives an example of the analysis tool aimed at solving a wide class of historic problems. The development of a geochronologica...

In this paper, the author analyzes the possibility of obtaining the orientation of geologic planes by using GPS tools. Theoretical background for such procedures is represented by an analytical model of finding the attitude by using three noncollinear points. During the experimental stage orientation measurements on synthetic planes were carried out by using GPS tools and geological compass. The output data obtained by GPS and compass was analyzed and compared by using stereographic projection. The measurement unc...

This paper presents a novel heat transfer model for the estimation of heat transfer coefficients without any information about the thermal boundary conditions. The massively parallel implementation (using the latest CUDA 8.0 framework and NVIDIA graphics cards) of the model gives the opportunity to use multiple graphics accelerators to execute the heat transfer simulations. This leads to very impressive performance which makes it possible to run thousands of simulations within a reasonable time. There are several ...

The article deals with the problem of debug of hardware computational units intended for stream data processing on FPGA. Modern solutions are usually oriented to debug of a hardware unit implementation in a simulator with some model input data or to observing the implemented design in the prototype with real target system environment. However effective analysis and debug of implemented computational algorithms requires combined debug with test data exchange between hardware unit model in simulator and its implemen...

In the paper a novel technique of impulsive noise suppression in color digital images is proposed. The new filtering design is based on the exploration of the local pixel neighborhood by geodesic digital paths, whose cost defined as a sum of squared Euclidean distances between adjacent pixels in the RGB color space, serves as a measure of pixel corruption. The digital paths link the border of a filtering window with its central pixel and the cost of a path with minimum value is used to discriminate between the noi...

The article presents our own solution of a monitoring information system developed on base of experience learned from completed projects. Information system integrates automated data collection by geodetic and non-geodetic sensors, and presentation of data through a web interface. The measuring part of the system supports data collection by multiple types of sensors. At present are pluggable leveling sensors (Leica DNA03, Leica Sprinter), GNSS sensors (Leica System 1200), 3D sensors (robotic total station Topcon G...

We consider formation of the knowledge database within geographic information systems for support the managerial decisions on the development of spatially distributed systems and territories. Knowledge database built on systematized and formalized the laws of development of objects, phenomena, events of the subject area, obtained through theoretical studies, practical activities and work experience that allows professionals to formulate and solve management problems. To represent ontologies in the knowledge base i...

In spatial data processing, the area of legislation is crucial but often neglected by the expert's community. Knowledge of the various legal aspects related to the data collection, data processing, and analysis of data, as well as publishing the results of spatial analysis and its visualization, is an essential prerequisite for effective work. Legislative aspects are understood as a set of legislative standards, their relationships and their influence on other fields of human activity. In the context of geoinforma...

This article discusses the use of different algorithms for analyzing data obtained by magnetic measurements in archaeological excavations. The aim of this work is the automatic detection of possible anomalies in data that may indicate the presence of archaeological sites. The article discusses two kinds of anomalies пїЅ useful (caused by the presence of archaeological sites) and spot anomalies (caused by the presence of various metal debris). Spot anomalies create local noise that interfere with the determination ...

Nowadays, efficient urban transportation systems have a very strong impact on economic prosperity and development. The quantity and quality of transport infrastructure can influence attractiveness and desirability of urban regions for certain industries and can affect the quality of life of its citizen. Passenger transportation systems are characterized by complexity of its behavior and a high level of uncertainty; therefore simulation technologies have become an effective tool for their modeling and managerial de...

Economists usually apply quantitative methods for analysing economic data. Most of this data has a connection to a particular place or space. In geography, the location plays a crucial role, and together with attributes of such location it represents geospatial data. Collaborative work of economists and geographers (geoinformaticians) offer great opportunities in geospatial-economic data analysis and visualisation. Joining two relatively distinct disciplines brings added value for both economy and geography. In ot...

None of optical devices is perfect. Each lens has some errors, e.g. tilt, coma, spherical or chromatic aberration. The more lenses are in the optical device the more errors can reveal. All these imperfection accumulates and multiplies during the path through the optical device. It is necessary to know how the light passes through and interacts with each optical element. There are some possibilities of simulation of these defects. One of these methods is ENZ (Extended Nijboer-Zernike) theory which can be set up for...

P systems are powerful computational devices, whose structure and functionality are inspired by living cells and organisms. P colonies are one of the types of P systems working with objects. They are formed from one-membrane agents placed in the shared environment and they use very simple rules. It was proved that P colonies are computationally complete devices. In the paper, we investigate the application of P colonies to simulate logical operators. It is obtained in a constructive way. In the first steps we show...

Currently, terrestrial laser scanning is one of the most common method of measurement used for registration of the shape of objects. This technology enables in short time to designate huge collections of spatial data, known as point clouds. Due to the amount of occupied memory, storing large data sets becomes now a big problem. One solution is to create algorithms that allows to reduce the amount of recorded data without losing the essential spatial information. On the market there are mostly paid programs, that a...

The results of research conducted in the field of development and application of mobile systems in problems of monitoring extreme weather situations (EWS). The proposed methods and development models take into account modern technologies like Map Reduce, Hadoop Java API, use of a precedent knowledge base about similar situations. The study places considerable emphasis on ensuring the reliability of the database and knowledge. Implementation of monitoring involves the use of a cloud of drones and other information ...

The article presents modeling data on taxes and average annual salary in Bulgaria. This information is stored in a created relational database containing twelve tables. Updating the database is done each year, and the respective new records are entered into the indicated tables. The data about the taxes that are included in total expenditure of households by expenditure groups, average annual salary in Bulgaria and average annual salary by regions (North-West, North Central, North-East, South-East, South-West and ...

Predictions of catastrophic seismic events are extremely important. Such predictions are based on the continuous monitoring of many varying values characterizing the tension in the earth's crust. One of these indicators is micro oscillations in the Earth's crust, committed under the influence of the lunar-solar tidal forces. Devices for the registration of these oscillations are extremely complex, based on laser interferometric techniques. These devices converts length increment into according increment the phase ...

An important aspect of the management of territories is the possibility of constructing models describing the behavior of the territory (managed system), which predict the response to control action. The processes of territory management and organizational systems closely links with the concept of damages (risks). When we talk about geo-processing management, we use the concept of пїЅgeo-hazardsпїЅ. The work is devoted to the problems of applying the classical theories to new problems: the description of the behav...

Linear programming problems are optimization problems where the objective function and constraints are all linear. Mathematica has a collection of algorithms for solving linear optimization problems with real variables, accessed via LinearProgramming, FindMinimum, FindMaximum, NMinimize, NMaximize, Minimize, and Maximize. LinearProgramming gives direct access to linear program- ming algorithms, provides the most flexibility for specifying the methods used, and is the most efficient for large-scale problems. FindMi...

Eco-grammar systems represent grammar systems which were motivated by the behaviour of ecosystems. They were introduced in 1994 in order to describe evolving environment and community of agents together with the interplay among them. Positioned eco-grammar systems (PEG systems, for short) were introduced in our previous paper as a variant of the eco-grammar systems. Motivation for introducing the PEG systems and its main difference from the original eco-grammar systems is that we focus on the embodiment of the age...

Lots of modern heat supply systems were designed and constructed many years ago, but used today with low efficiency. The task of optimization of heat supply systems to increase the efficiency of such systems is related with high capital expenses of such process, but also with high mutual integration of heat supply systems with other infrastructure objects. In this regard the heat supply organizations are faced with a task of optimization of the efficiency indicators of functioning heat supply systems with minimal ...

Organization of the Access database of the Kadiica copper deposit Eastern Macedonia represents the first attempt of this paper authors to synthesize geological exploration data of this ore bearing locality in one professional database available for the wider auditorium. Authors experience in organization of similar databases for other metal deposits such are Bucim, Borov Dol, Zletovo, Sasa etc., gave us an opportunity to construct quality Access database for the Kadiica deposit. This deposit is of porphyry type wi...

Urban transit system planning in large cities requires information about demands on passenger transfers. These demands are commonly represented as an origin-destination matrix (O-D matrix) that contains aggregated data of passenger turnover and traffic. Information, needed for these representations to be constructed, is usually collected using analytical models and natural surveys. Unfortunately, these methods do not provide necessary precision for high quality transport system management and are also quite expens...

Fused Deposition Modeling (FDM) is one of the most used technology in the 3D printing field. There is many kind of 3D printers with different design and parameters, such work temperature, deposition speed and others. All of these parameters affect the final parts. Produced parts are made from different materials and therefore there are also different mechanical properties. So it depend what for the produced parts are designed, if there are just for design introducing or even for real use as conventional produced p...

Today, growing number of ransomware attacks from the cyberspace is getting more and more attention as the danger of immediate closing of business for attacked organizations rises dramatically. High level encryptions used by current versions of ransomware makes it almost impossible to be decrypted in the real time and probability of production going live again for attacked organization could be low. Estimated revenue up to 1 billion USD in 2016 makes this type of cybercrime activity very popular within the hackersп...

In this contribution, the authors describe a novel method of visualizing any 3D object into a 2D seamless picture with the use of cartographical principles. The method uses properties of a sphere with reflective inner surface, in which a 3D object and capturing camera are placed. A sphere surface is consequently unfolded using cartographic projection allowing to see the whole object in 2D. The method can be applied to any objects, preferably those of non-human origin, e.g. trees with leaves, cave systems, EarthпїЅ...

Provision of the most comfortable and fast passenger transportation is the most significant goal for any taxi organization. Undoubtedly, the quality of cars and driverпїЅs professionalism is an important factor for the organizationпїЅs success, however, the initial impression of the customer often depends on the quality and speed of dispatcherпїЅs work. Failure to respond quickly to clientпїЅs question or an error during the order processing will result to negative customer views on the organization's ability to p...

Authors describe the novel approach to boost the scientific data analysis performance with the data storing schema for distributed scientific research systems. This approach optimizes the workload on storage nodes and enhances the computation performance. Managing the enormous output of scientific research systems is expected to be the most technically difficult part of all recent projects producing Petabytes of imagery data. For example, NASA's EOSDIS produces several Petabytes of uncompressed data per year and w...

In paper the most important input variable revolutions (rpm) of drilling tool is analyzed by utilization of Shewhart control chart. The revolutions of drilling tools have a double meaning, in term of the performance and economics. Two measured variable namely pressure force F (N) and speed of rock drilling v (mm.s-1) closely related with revolutions. In general, control charts are used as a proven means to improve the qualitative parameters of production and in the prevention of errors, discrepancies in production...

A method of solving the selection problems with fuzzy parameters by means of a special algebraic structure is proposed. To construct such an algebraic structure, we propose a special transformation of existing fuzzy numbers to the simpler form (L or R number) while keeping the most of the initial expert information. This structure avoids deficiencies limiting applicability of the other known structures, such as unjustified extension of the uncertainty, violation of certain natural relations, openness of the carrie...

This report presents an approach to building specialized computeromputer-aided software engineering (CASECASE) tools for the development of information information-calculating applications including computer aided ac counting, business correspondence, statistics etc. These tools form an integrated development environment allowing the computer aided development of different applications in this field. The concept of the integrated development environment is defined as a set of tools and techniques allowing the desi...

The article is devoted to newly prepared methodology for survey, georeferencing and display of buildings in 2D and 3D, which is processed within the project "Omega 3" with support from the Technology Agency of the Czech Republic. The methodology is to establish a standardized output of geodetic surveying the interior and exterior of buildings, applicable to all types of buildings (residential, commercial, office, industrial, agricultural, equipment and infrastructure, rentals, recreational spaces) in order to ensu...

Steganography is part of security science that deals with art of data hiding. Modern steganography can serve as an effective tool for hidden data transfers or watermarking for various computer formats, like JPEG, PNG, and MPEG. But it can be misused for stealing data or information transfer in illegal activities too. Most of today available steganography tools are free for use with easy user interface. This significantly increases the risk of exploiting in business sector. Revealing this data is very difficult and...

The e-learning system eLogika serves for teaching logic. In the system there are study materials at studentsпїЅ disposal, but it also provides online tests and promotes all the activities in which the students can obtain their credits. The system collects data about users who are logged in, e.g. time spent on a particular activity, the number of activities performed by particular students, what data is a student interested in, etc. The goal of this paper is to describe the application of many-valued formal concept...

This paper presents a study of the structural models convergence, rezulted from CAD (Computer Aided Design ), based on method of estimation. The study of the structural models convergence presented a method based on the convergence, in the sense of mathematical analysis, adapted to finite strings. The convergence estimators are status sizes that characterize the response of the structural model to the given load. As convergence estimators can be used sizes that characterize the response of the structure, like foll...

This paper is oriented in the supervision of of the major earth movements, particularly in storehouses of explosives, for a beter orientation and safety during their supervision in earth. In Kosovo we have started a supervision of storehouses of explosives by using a global system of positioning GPS. We have put this system in function in Independent Commission for Mines and Minerals (ICMM), which has facilitated and ensured an accurate monitoring if internal movements in some strategic objects for the needs of Ko...

CTC (Communication Train Control) system it is known as integrated intelligent control systems for rail systems including mainline railways, light rails and underground lines in cities. With the development of modern data communication, computer and control techniques, CTC represents the future direction of rail control systems. At present, CTC has been used in one Kosovo railway line. Train control system in the Kosovo railway network, in the main line is installed which enables direction and control of trainпїЅs...

Issues of teaching C++ programming language at Moscow State University of Geodesy and Cartography (MIIGAiK) have been analyzed. Pedagogical experiments were conducted from 2009 till 2016. Modern course of C++ programming language for studentsпїЅ cartographers and geodesists has been developed. The training geodetic programs can be used both by teachers and students whose specializations are geodesy and mapping at lectures and practical sessions and also for home studies. The example of training program named "Coll...

Emotions are an integral part of human life. Different situations in our lives affect changing emotional state. It is believed that human facial expressions is distinctive enough to be a part of analysis that allows for assessment of emotional state. The article describes an innovative research conducted by scientists team. As input data used in movies recorded speed camera at speed of 1,000 frames per second in high definition. Registration of a human face took place during the application of the stimulus causing...

The laser meter of super small rock displacement under the influence of gravitational forces from the moon and the sun allows registering the regular fluctuations in the Earth's crust. These fluctuations provide small difference in the distances between the rocks edges in the two orthogonal directions inside the shaft structure drilled in the rock. Laser-based displacement meter converts the distance change into the increment of the phase difference in the two light beams in the interferometer. The photo detector ...

The aim of the article is an example of how to handle the process and visualize data from the sensor SRS in a GIS environment. Spectral Reflactance Sensor (SRS) is a contactless position sensor system manufactured and distributed by Decagon that monitors vegetation cover, and depending on the use of sensors allows for the Normalized Difference Vegetation Index (NDVI) or Photochemical Reflectance Index (PRI). Values of the spectral reflectance are gradually transferred from the field sensor to the PC environment, a...

The paper deals with issue of computation of the sunrays penetration through point cloud data with considering the geometrical and astronomical principles in calculating the Sun position relative to points of the objects on the Earth surface. Input data are represented by point cloud obtained by the method of terrestrial laser scanning and they express group of trees in the forest stand, where solar insolation is one of important parameters being studied in forest protection management systems. Currently used meth...

Computer simulation is substitution of original object by another one in order to obtain information about the most important properties of the original object using the object model. Depending on the purpose, the simulation can be made on two levels: on the qualitative and quantitative. Accordingly, descriptive or constructive models are used. Mathematical modeling is always performed quantitatively using design patterns. This article describes the modeling of computer networks and their parameterization. One of ...

Nowadays in buildings energy supply the various combinations of the district heating, electricity and natural gas systems are used for heating, hot-water supply, cooking and etc. At the same time due to the development of energy saving technologies the available generating capacity on various types of energy has appeared and the competition among energy supplying organizations may occur. Therefore, we need to consider the impact of such decisions on the development of all types of engineering networks in specific ...

Network steganography could be used to try to send secret information using computer networks. Transfer of secret information must be carried out in a manner that is hard to detect and compromise covered communication in this way. Only the entities involved in such correspondence should have the right to read the content of message. For other observers, such data exchange should not arise any suspicion. Currently, a lot of interest among scientists is paid to topics of assessment of the suitability of various netw...