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We propose a theme analysis method that takes into consideration the perspectives of both a supplier (place) and a consumer (user) in unstructured place reviews written by users. To this end, ambiance on the place side and companion and time on the user side were considered as the theme elements. For the experiment, we used the review text data written in English provided by Yelp, and we selected coffee-related places (e.g., coffee shop, coffee house, etc.) from various place categories. From among them, we chose ...

The design of personalized footwear insoles involves modelling the 3D shape of the insole based on the individual feet plantar surface shape and dimensions. The advantage of custom made insoles over the mass produced ones are represented by their enhanced functionality. Custom made insoles are recommended for subjects with various foot health disorders and for subjects who undertake intensive physical activities like athletes and soldiers. During human life time, under repetitive mechanical stress, feet suffers di...

The main objective of this article will be focused into the possibilities of 3D printing paper machine called Mcor IRIS HD and also to subscribe the principles of this 3D printer in general. This machine is not well descripted yet; so the main idea is based on how this 3D paper printer works. Also, unlike the other 3D printing materials, this paper technology is not so well-known nowadays. There will be explained how the papers are spliced layer by layer on the building platform inside the 3D printer and the proce...

This paper presents an original approach on developing and testing an extruder for paste-like materials for conventional 3D printers based on Fused Deposition Modeling (FDM) technology. The main advantage of such technology is that it allows the final product to be modified / altered after fabrication i.e. either to correct printing irregularities or simply give it another design form. The material is fed into the extrusion nozzle via a plastic cylinder driven by an electric actuator. Various extruding nozzles wer...

Computers have replaced peopleпїЅs work in various economy sectors for quite some time. Newer and newer technologies and software are designed to improve quality and safety. Precision and accuracy are the most important, both while looking for mineral depositsпїЅ documentation and during their exploitation in the future. Most geological works are performed using proven, classical methods. However, the development of computer science nowadays is huge. More and more mining operations are performed by means of comput...

Of all geographically related health problems, pollen allergy is one of the most common allergic diseases of the respiratory tract. To support pollen allergy sufferers (including allergic rhinitis, conjunctivitis and asthma), a range of mobile applications are available for tracking pollen forecasting and recording symptoms. The geographic location of such records provides new opportunities for WebGIS pollen allergy monitoring. However, adding raw VGI data to a web map may produce more misinformation than benefits...

Building a telecommunications system based on routers allows you to use traffic prioritization to improve the quality of user traffic, regardless of network technology. This new feature, compared to networks built entirely on hubs, is a consequence of the fact that routers buffer packets before they are sent to another port. The router usually leads for each input and output port not one but several queues, each queue having its own processing priority. The efficiency of the network depends on the capacity of the ...

A novel image edge detection technique is proposed in this paper. The considered boundary detection approach uses a nonlinear parabolic partial differential equation (PDE) - based model. We develop a nonlinear anisotropic diffusion scheme consisting in a second-order parabolic equation and some boundary conditions. An effective edge-stopping function is constructed for this PDE model. Then, we construct an explicit iterative numerical approximation scheme for this model, by using the finite-difference method. This...

The goal of the presented application is to find a simple way how to randomly divide n patients into 2 groups 1 and 2. The main requirement is no dependency on target platform and the application must be available online for many different medical departments. Each department must have a unique login. No higher security level such as two-factor authentication is required. The results of the division into the groups represent a random choice of patients recommended to conventional and a new treatment without any pr...

Ecosystems are open adaptive systems with self-organizing properties; they are based on local interaction of the composing elements and generating a general end-result. Digital ecosystems incorporate these features in context-aware applications that work together for the efficient solving of complex dynamic problems. This article considers the digital ecosystems as being open-system of applications with a certain degree of context-awareness. It also presents Econtxt a programming model for the context used by cont...

The progress achieved over the past half century in modeling of hydrophysical processes and numerical methods, as well as the current level of computer and information technologies, led to an increasing use of 3-D models for modeling aquatic ecological systems. Nevertheless, the problem of numerical solution of systems of equations describing coupled hydrophysical, hydrochemical and hydrobiological processes is highly time-consuming and difficult from a computational point of view. In addition to computational dif...

The paper considers the problems of requirements formalization in the implementation of software development projects, as well as ways to solve these problems. When developing a unified model for converting requirements into a formal model, a static model describing the general concepts of the transformation of requirements into a formal model and their relations will be considered, taxonomies that classify and define the main types of requirements imposed on the requirements of the rule, approaches for pretreatme...

The paper presents a method for authenticating images that were shot using a mobile phone. Thanks to the newest advances in integrated cameras, smartphones represent one of the most popular ways to take a photograph. A picture could be critical evidence in a trial and, with the abundance of free editing software, a forgery is easy to achieve. A method to secure and test photographs for authenticity was developed, implemented as a mobile application, tested and detailed in this paper. The watermarking algorithm is ...

An original approach to studying acoustooptic interactions at infralow frequencies using seismic vibrators is proposed. The authors in numerous and natural experiments has been proved that such sources can radiate low-frequency acoustic oscillations, propagating in the atmosphere up to hundreds of kilometers from the source. High-precision metrological properties of vibrators on frequency-time characteristics open up possibility for investigating acoustooptic interactions at infralow frequencies. An acoustooptic s...

The article presents the analysis results of the physical environment of the data transmission between the technological equipment of automated dispatch control systems via interface RS-485. One of the ways of energy supply and life support systems improving in the part of energy efficiency increasing is distributed facilities automated dispatch control systems (ADCS) application. Because of control centralization of distributed heterogeneous engineering systems of buildings with multivendor devices and different ...

Multi-access Edge Computing (MEC) is a new information technology that brings Cloud capabilities into the Radio Access Network (RAN). The vicinity to end users allows applications with requirements for wide bandwidth and low latency. MEC services provide direct access to real-time radio network information which enables offering of context-related applications. The communication between MEC services and applications is based on Service Oriented Architecture (SOA). In this paper, an approach to definition of Applic...

The aim of this paper is to propose an improved algorithm for estimating the risk of bankruptcy of the Bulgarian insurance companies. The algorithm is developed based on the multi-layers neural arhitecture with input dates represented by values of indicators from the financial statements of Bulgarian insurances companies. The memory of the neural network will provide informations about the risk of bankruptcy. Development of the neural model (algorithm R2b2n- risk bankruptcy of Bulgarian insurance companies with ne...

Since INSPIRE directive was published in 2007, many datasets became publicly available in interoperable way. This makes possible the developing of wide range of applications (including web and mobile) that use this information as data source. In this article authors test all for download available datasets registered in Latvian spatial metadata catalogue and describes the technical details such as the feature type, feature count in dataset, geometry type, default coordinate reference system, standard name and deri...

The recent development of remote sensing technologies and rapidly accumulating environmental data derived from geographic information systems (GIS) now provide information on the patterns of terrestrial environmental variation at global and continental scales. Moreover, the past decades, an extraordinary amount of work has been undertaken to map species distributions and use the collected information to identify suitable habitats. Remote sensing metrics have become an integral part of SDM studies and contribute th...

One of the key trends in the sector of information and communication technology (ICT) is the Internet of Things (IoT). It allows the connection of two planes пїЅ the real and the virtual. This concept assumes that different devices and objects which use sensors can communicate with computers or exchange the collected data via the computer network. This can have a positive impact on the management of complaints, in particular those systems where applications are a manifestation of dissatisfaction internal customer....

The development of software (information systems in particular) is a time-consuming process. As statistical research shows more than half of the projects on the creation of information systems are not successful (there are some difficulties, or not implemented at all). All existing approaches consider the development of the system from the point of view of the objective concept, which represents the system as "a set of elements and relations between them." This leads to the problem of transition between the stages...

The coal processing industry uses a various technology for the process control. Various devices and control systems there can be implemented. With the support of automation, the production of final product can be more effective. Modern control system requires an advanced control algorithm on a several control levels (i.e. stabilization, optimization). The paper focuses to the process of coal combustion and coal gasification. Primarily two processes are examined i.e. underground coal gasification (UCG) and coking. ...

The article describes the results of the research project "Development of new technologies for surveying and cadastre", has been solved under the program to support applied research and experimental development "ALFA" and the provider of support Technology Agency of the Czech Republic. The aim of the project was to develop in the years 2012-2015, new technologies and software support for traditional surveying work such as documentation of detailed survey of changes, survey sketches, laying-out buildings, creation ...

This paper presents a technique for the detection of elliptic objects connected with subsidence troughs in radar interferograms using the Hough transform. The generalized Hough transform to detect arbitrary shapes, including ellipses, requires a five-dimensional accumulator array, which occupies a very large part of the memory. For this reason, to overcome memory problems, a modified algorithm using a one-dimensional accumulator array was applied. This modification helped also to reduce the computation time. In th...

Mining is a complex and staged process that includes: prospecting, documenting, and mine planning, opening up and extraction of mineral (mining, transport, processing and deposition of waste), revitalisation and re-development of former mining area. Mining permit and decision on environmental impact of the enterprise are required prior to commencement of mining. During and after end of mining, impact of mineral extraction on surrounding environment, including surface deformation and the related mining damage, wate...

The commutation of inductive low voltage circuits of alternating current is accompanied by the occurrence of commutation over-voltages, often hazardous for the components of the electrical circuit. This paper describes a modern method for studying transitory regimes which occur at the disconnection of inductive circuits, based on the usage of a data acquisition system type NI-USB 6003 manufactured by National Instruments. The software used is Matlab, and the data acquisition method is based on Matlab programming. ...

The technology of extending the service-oriented architecture of building configurable information systems is considered. The actual task is to increase the flexibility and efficiency of the newly created integrated information systems or services by providing the ability to configure the logic for the execution of functions that perform services in SOA. An additional task is to decrease the complexity of configuring the functionality of the service and to make it close to level of complexity of customization of b...

In this paper, it presents a modality for verification of conformity the parts which are achieved on CNC machine tools, modality which takes into account the production process capability. By this control method it determines the capability of the technological process of making the piece, it can be applied either on the technological process flow, or on reception of consignments of products. As the case study, it was considered a piece ,,end effector,, used in industry building of machine, whose volume of achieve...

In this paper, we present a performance assessment of the implementation of the algorithm of wave sources location using wave field modelling on a Graphics Processing Units (GPUs). The numerical algorithm of wave source location based on the acoustic wave equation was implemented using finite difference method. To achieve better wave source location, the algorithm was implemented using staggered grid meshes. The parallelization was carried out using GPU approach, established in NVIDIAпїЅs Compute Unified Developme...

Petri nets is one of mathematical modeling languages for the description of all kind of parallel systems. The new class of P/T Petri multiprocess multinets (PPMM) and its ASYNC-CALL operation are introduced in this article and their base characteristic of the well-formed property is proved. PPMM then generalize the definitions of the bi-relational P/T Petri nets and the P/T Petri process nets and their operators that follows from the base ideas of Petri net processes and their property-preserving Petri net process...

This paper presents an approach of using Augmented Reality (RA) technology for operator training in quality inspection of various large sized metallic products such as pipes, weldings, metal sheets, etc. An Android software application has been developed and implemented using Unity 3D Software Development Package(TM). The proposed application simulates the use of various ultrasonic sensors/probes to train human operators without the need to use the actual expensive inspection equipment. The user manipulates a 3D p...

Improving diagnostic efficiency of pulmonary diseases is now a very urgent task. For the construction of automated systems of recognition and classification of radiographic images is necessary to perform the process of localization of pathological formations on chest fluorography. The correct choice of the method of segmentation for studying radiographic image segments provides quality and improves the accuracy of diagnostic decisions taken. The article shows a block diagram of a device that implements a method fo...

The aim of the paper is to solve design of the automatic identification system via radiofrequency technology with respect to spatial analysis data acquisition. The compact system of automatic identification at railway defined by GS1 standards enables to monitor motion and operating status at the level of whole trains, wagons or even at the level of individual container or other load. If the acquired data are supplemented by coordinates of places, where they were obtained, those can be used for the spatial analysis...

Paper deals with important aspect of organization and implementation of transport operations and transport processes between points of origin and points of consumption in order to meet requirements of GS1 standards to fulfill supply chain needs. Designed information system (hardware, software and communication features) is installed on each logistic unit (wagon, container etc.). This allows to use extended self AutoID functions for low level data preprocessing. Paper focuses on train composition of both rail and r...

Nowadays we can see rapid increase in the amount and speed of acquired environmental data and automate the process of collection. The development of multilayer, interoperable GIS increases the requirements for the correct, comprehensive description of the presented objects and phenomena. The article presents a proposal of spatial boundaries classification for the purpose of spatial information systems improvement. Vector spatial information model use division into point, line and surface objects. This model does n...

A modern cadastral system should meet it requirements. These requirements relate mainly to the way of cadastral data access. The definition of cadastral system turns out to be not sufficient in the context of the on-line formula, because cadastral system is a distributed and extensive. The data of this system should be compatible with other information systems. In the presented paper, the author proposes the definition of a cadastral system relating to the most important element of the data quality which is the se...

Contemporary measurements of the bottom during hydrographic sounding use modern multibeam systems and precise positioning one. Determination of coordinates of acoustic wave's reflection points on the bottom is based on transformation coordination sets: connected with positioning system and echosounder's transduces(s) based on CoG - Center of Gravity and spatial orientation determined by MRU - Motion Reference Unit.Despite using mentioned devices (systems), in the geospatial data cloud there are incorrect points, w...

The aim of this paper is to highlight the significance threshold between the kinematic and dynamic characteristics of sports technique key elements used in dismounts and the performances achieved by junior gymnasts in uneven bars events. This scientific approach is part of the formative pedagogical experiment associated to the postdoctoral thesis, at the midway point, in the end of the competitive year 2014. The following research methods have been used for this purpose: bibliographic study of specialized literatu...

In the modern literature, various methods of qualitative and quantitative assessment of maxillofacial anomalies are described. They are reduced to determining the location of violations, describing the causes of their occurrence, considering the functional state of the dentoalveolar system, as well as quantitative expression of the degree of violations of face aesthetics, occlusion, morphology and function in various dentofacial and facial abnormalities. The method developed by us makes it possible to objectively ...

The modeling of eddy currents in ferromagnetic materials is impossible without information about magnetic field induction dependence of it intensity (magnetization curve). Experimental definition of magnetization curves related to technical difficulties. As a rule, reference information of that curves contains a small amount of knowledge and not applicable for direct application. In this regard the transition from original magnetization curve to its approximation is relevant. The purpose of a research is in the ch...

Numerical algorithms for constrained nonlinear optimization can be broadly categorized into gradient-based methods and direct search methods. Gradient search methods use first derivatives (gradients) or second derivatives (Hessians) information. Examples are the sequential quadratic programming (SQP) method, the augmented Lagrangian method, and the (nonlinear) interior point method. Direct search methods do not use derivative information. Examples are Nelder|Mead, genetic algorithm and differential evolution, and ...

The methodology of computer simulation of nonstationary fields of temperatures, concentration and pressure is considered. The computer model of non-stationary heat exchanging process is researched. Decentralization interaction of the active parallel agents is the base for computer implementation. Agents are defined as abstraction of elements of physical system where the modeled processes proceed. Process characteristics are calculated on the base of information on non-stationary fields of temperatures of a wall of...

The aim of this paper is to highlight the degree of connection between the kinematic and dynamic characteristics of sports technique used in acrobatic elements and the performances achieved by junior gymnasts in balance beam events. For this purpose we used the following research methods: bibliographic study of the specialized literature, pedagogical observation, video-computerized method, using пїЅPinnacle StudioпїЅ and пїЅPhysics ToolKitпїЅ programs, method of movement postural orientation and evaluation of spor...

This paper proposes an evaluation of data acquired with various sensors and used in coastal water segmentation applications. Correct monitoring of coastal changes in dynamic coastal environments strongly depends on accurate and frequent detection of shoreline position. Automatic shoreline delineation methods are preferable, especially in terms of time, cost, labor intensiveness and difficulties of in-situ measurements. Two main issues have been encountered within this application field, the quality of data and the...

A very important factor, which has a great influence on the financial situation of mining enterprises extracting coal, is an effective use of machines. To determine the level of the use of the machines, it is necessary to reliably evaluate their work. The credibility of such evaluation mainly depends on the quality and the amount of obtained data about the parameters of the machinesпїЅ work. To synchronize, archive and analytically process the data, it is essential to use appropriate informatics tools. The article...

The authors of this paper developed a concept that can be used for automatically car parking; the concept is based on finding the obstacle free spaces around the vehicle and it uses methods to guiding the car in an available found parking place. The car sensing system includes ultrasonic sensors to measure distances, proximity sensors to detect obstacles and a rotative position sensor to measure the vehicle displacements. A microcontroller based central processing unit (CPU) was used to process sensorsпїЅ informat...

Steganography can be used for illegal activities. It is very important to be prepared. To detect steganography images we have counter-technique known as steganalysis. There are different types of steganalysis, depending on if the original artifact (cover) is known or not. In terms of practical use, most important are methods of пїЅblind steganalysisпїЅ, that can be applied to image files and because we do not have the original cover for comparison. This article deals with the application of neural networks on the ...

There is a problem of a traffic block nowadays, which started in the middle of the last century and had become a real disaster for many developed countries. There is a variety of methods of traffic regulation and traffic flows management, which were developed at different times. One have become irreparably out of date and does not provide the solution of the traffic block problem in present conditions of growth of vehicles amount. Another allow to improve the management of urban traffic flows, but a lot of resourc...

We developed based on GIS method for model decision implementation to manage the process of ensuring environmental safety. Management of environmental safety requires forming processes with predetermined properties. This work presents a control concept based on synthesis, which allows fulfilling these requirements. To do this, we discussed the dialectic of the social, economic, technical-technological systems and their influence on the processes of environmental security. We show that the control of the process of...

The target of paper is the presentation of theoretical basis, methods and results of digital modeling (structural-lithological, geological-dynamic, logic-information) of heavy minerals placers for defining of their economic prospects. It is connected with need to improve methods of informational provision for researching works, aimed at involving of heavy minerals placers for the development of raw materials base of titanium, zirconium, tin, gold and other metals according to demands of pertinent industrial progre...