2016 - Publications Repository - Gdańsk University of Technology

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Publications from the year 2016

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A new method of presosns identification based on comparative analysis of 3D face models
- Katarzyna Bobkowska
- Artur Janowski
- Marek Przyborski
- Jakub Szulwic
2016
The article presents the use of modern close range photogrammetry for possessing highly accurate 3D models of the human face (including the ears). Modern methods used to obtain precise data describing the construction of a human face, and even the whole human body, should allow to get finished measurement material in a very short time. Those features belong to the optical scanning technology. Comparative analysis of models of the human face has been made (created from the cloud of points obtained from optical scanner) for the same person as well as for two different persons. Among other things, the parameters describing the similarity of a human face (in particular, the similarity of the human ear) based primarily on the analysis of the differences between the points of the model (comparison of several hundred thousand points on the model) were determined. Ultimately, these parameters can be used to identify persons. Considering the great opportunities presented methods, other potential applications have been presented.
A New Method of the Load Compensation Use During Creation of Post Blackout Start-up Path in Power System
- Robert Małkowski
- Maciej Łosiński
- Stanisław Czapp
- Robert Kowalak
2016 Full text Elektronika Ir Elektrotechnika
In the paper a new method of effective use of load compensation during creation of post blackout start-up path is proposed. Theoretical assumptions and simulation results of an investigation are presented. An experiment performed in the Polish Power System is also described. This experiment proved that the method proposed by the authors is advisable. The method may be utilized by power system operators for power system restoration process in emergency conditions.
A new quantum-inspired approach to reduce the blocking probability of demands in resource-constrained path computation scenarios
- Kanstantsin Myslitski
- Jacek Rak
2016 Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne
This article presents a new approach related with end-to-end routing, which, owing to quantum-inspired mecha-nisms of prediction of availability of network resources, results in improved blocking probability of incoming requests to establish transmission paths. The proposed scheme has been analyzed for three network topologies and several scenarios of network load. Obtained results show a significant (even twofold) reduction of blocking probability in comparison to results characteristic to the reference solution.
A novel approach to energy safety improvement in the marine power plants with active power surge compensator
- Maciej Grabarek
- Ryszard Strzelecki
2016
Paper raises a point of power surges and theirs adverse effects in the marine power plants. The article explains a source of surges appearance, and presents measurements carried out on a modern ship. It discusses effects of dynamic power transients on the ship’s energy safety. Finally it proposes, a novel approach for power surge elimination, based on medium voltage active conditioner. As well as it propose the topology and control strategy of such conditioning system, together with preliminary experimental result
A novel chemiluminescent immunoassay for detection of Toxoplasma gondii IgG in human sera
- Lucyna Holec-Gąsior
- Bartłomiej Ferra
- Justyna Czechowska
- Illia E. Serdiuk
- Karol Krzymiński
- Józef Kur
2016 DIAGNOSTIC MICROBIOLOGY AND INFECTIOUS DISEASE
This study describes Toxoplasma gondii IgG chemiluminescent immunoassay (CLIA) based on the use of a novel immunochemical reagents in the form of the conjugates of original acridinium ester (AE) labels attached to antibodies and SAG2-GRA1-ROP1L chimeric antigen and shows that this test is useful for diagnostic purposes.
A novel concept for tissue-metal detection and differentiation using an inductive proximity sensor
- Agnieszka Gorczewska
- Artur Poliński
- Jerzy Wtorek
- Bart Truyen
2016
In this paper a novel application of inductive proximity sensors for detection of living tissue by means of measurements of the coil impedance changes at different frequencies is described. The mathematical analyses utilizing Bessel function estimation include detected object size and its distance from a sensor. The main aim of this study is to prove the possibility of distinguishing between metal objects and living tissues. The movement of an object can be also detected, assuming it is in a distance comparable with a size of the induction sensor.
A novel concept of H2/O2 steam generator
- Gołębiewski Marek
- Halbryt Sławomir
- Janusz Cieśliński
2016
This paper presents an idea of hydrogen utilization to steam generation to drive a turbine and produce electricity or to supply a condenser as an element of a heating system. Electrolysis process is considered as a source of hydrogen as well as oxygen. Hydrogen combustion with a stoichiometric ratio of pure oxygen produces steam at very high temperature. Steam temperature can be controlled by mixing the generated steam with liquid water injected into the steam generator. The details of the prototype H2/O2 steam generator are presented. The concept of the test stand - consisting of the electrolysis unit, H2/O2 steam generator and steam condenser, is described.
A NOVEL CONCEPT OF H2/O2 STEAM GENERATOR
- Marek Gołębiewski
- Sławomir Halbryt
- Janusz Cieśliński
2016 Instal
This paper presents an idea of hydrogen utilization to steam generation to drive a turbine and produce electricity or to supply a condenser as an element of heating system. Electrolysis process is considered as a source of hydrogen as well as oxygen. Hydrogen combustion with a stoichiometric ratio of pure oxygen produces steam at very high temperature. Steam temperature can be controlled by mixing the generated steam with liquid water injected into the steam generator. The details of the prototype H2/O2 steam generator are presented. The concept of the test stand - consisting of the electrolysis unit, H2/O2 steam generator and steam condenser, is described.
A novel method for drop in drop edible oils encapsulation with chitosan using a coaxial technique
- Robert Tylingo
- Szymon Mania
- Jakub Szwacki
2016 Full text REACTIVE & FUNCTIONAL POLYMERS
The presented work concerns a novel one step method for oil encapsulation. In this coaxial system the oil constitutes the core of the capsule, while the chitosan solution is the polymer shell surrounding the core to provide separation of the core from the external environment. The paper contains a diagram of the encapsulation equipment and explains the principle of its operation. The experimental results showed the impact of the media flow rate on the size, shape, mechanical properties and the amount of oil in the capsules. Conditions of the core solution were determined to be: 2.00 g/h, and shell solution: 4.45 g/h. Maximal oil content obtained under these conditions was: 45.2%. The diameters of the capsules collected gravitationally in the nitrogen stream were from 3.7 to 4.4 mm and from 2.8 to 4.3 mm, respectively. The force needed to obtain 50% compression strain of all tested samples was in the range from 0.11 to 0.19 N. In comparison to other encapsulation methods, the presented technique is much simpler and can be performed under mild conditions. Moreover, the use of natural polymers as a coating matrix enables the use of the described technique in many branches of industry.
A Parallel MPI I/O Solution Supported by Byte-addressable Non-volatile RAM Distributed Cache
- Artur Malinowski
- Paweł Czarnul
- Piotr Dorożyński
- Krzysztof Czuryło
- Łukasz Dorau
- Maciej Maciejewski
- Paweł Skowron
2016 Full text Annals of Computer Science and Information Systems
While many scientiﬁc, large-scale applications are data-intensive, fast and efﬁcient I/O operations have become of key importance for HPC environments. We propose an MPI I/O extension based on in-system distributed cache with data located in Non-volatile Random Access Memory (NVRAM) available in each cluster node. The presented architecture makes effective use of NVRAM properties such as persistence and byte-level access behind the MPI I/O API. Another advantage of the proposed solution is making development of a parallel application easy and efﬁcient as a programmer just needs to use the well known MPI I/O data model and API while efﬁcient ﬁle access is automatically provided without a need for application level optimizations like avoiding frequent operations on a small data. Results of experiments obtained with three different applications suggest, that the extension signiﬁcantly reduces ﬁle access time, especially for small I/O operations. By locating cache facilities on computing nodes, the extension decreases load of ﬁle system servers and makes I/O scalable
A PRELIMINARY STUDY ON THE OPTIMAL CHOICE OF AN IMPLANT AND ITS ORIENTATION IN VENTRAL HERNIA REPAIR
- Izabela Lubowiecka
- Katarzyna Szepietowska
- Czesław Szymczak
- Agnieszka Tomaszewska
2016 Full text Journal of Theoretical and Applied Mechanics
This paper addresses the problem of ventral hernia repair. The main goals are to find an optimal surgical mesh for hernia repair and to define its optimal orientation in the abdominal wall to minimise the maximum force at the tissue-implant juncture. The optimal mesh is chosen from a set of orthotropic meshes with different stiffness ratios for typical hernia placement in the abdominal area. The implant is subjected to an anisotropic displacement field, different for the selected hernia placements. The assumed displacement fields correspond to regular human activity. Proper implantation of the mesh may determine the success of hernia repair and/or the postoperative comfort of patients. The proposed solution is based on FEM simulations of different surgical meshes behaviour. In typical hernia placements, the optimal orientation of the stiffer direction of the implant is perpendicular to the spine. However, the presented results show some cases that an oblique direction may be the optimum one.
A PROPOSAL FOR ONE-IMAGE PHOTOGRAMMETRY SYSTEM FOR MEASURING THE CLEARANCE DISTANCE. CASE STUDY
- Adrianna Barbasiewicz
- Katarzyna Bobkowska
- Paulina Bujała
- Artur Janowski
- Marek Przyborski
2016
Measurement of the clearance distance (both in the context of the rail and road) is one of the current and increasingly discussed topics in the context of photogrammetric and image processing (computer vision) methods. The article presents a description of a simple and rapid method of measure the clearance distance between the obstacles by using one-image photogrammetry. The proposed method was tested for the railway, tram and road clearance measurements. This method is based on placing (dynamic or static) testing board in the clearance distance between the relevant obstacles. In addition, this method involves the use of non-metric camera to take images with the appropriate distance, which is dependent on the clearance distance. Before taking a picture, the camera should be calibrated and appropriate parameters should be set. Then the pictures are processed using the appropriate software. Finally we have a fully metric image, which can be used for doing measurements. Achieved accuracy oscillated within 1-2 pixels. One of the advantages of this system is the speed of measurements collected at the field session. This method is much more economically and financially efficient than currently known systems for doing such a measurements, which are based on metric cameras or surveying instruments.
A recent developments in polyurethane foams containing a low-cost and pro-ecological modifiers
- Paulina Kosmela
- Łukasz Zedler
- Krzysztof Formela
- Łukasz Piszczyk
- Józef Haponiuk
2016 Full text Chemistry & Chemical Technology
Diversity of the polyurethane (PU) foams applications cause that investigation of the relationships between their structure and properties is currently very popular topic among the many research institutions and companies. At the turn of the last years many scientific papers about PU foams and their composites were published. The one of the main research trends in this field is related to the reduction of production costs of PU foams. This aim can be successfully achieved through the incorporation of raw materials of natural origin or the utilization of waste materials. This work reviews the progress and recent developments in area of PU foams containing low-cost and pro-ecological modifiers, such as crude glycerol, liquefied biomass, ground tire rubber, etc.
A self-optimization mechanism for generalized adaptive notch smoother
- Michał Meller
2016 SIGNAL PROCESSING
Tracking of nonstationary narrowband signals is often accomplished using algorithms called adaptive notch filters (ANFs). Generalized adaptive notch smoothers (GANSs) extend the concepts of adaptive notch filtering in two directions. Firstly, they are designed to estimate coefficients of nonstationary quasi-periodic systems, rather than signals. Secondly, they employ noncausal processing, which greatly improves their accuracy and can be applied whenever additional delay can be tolerated. The paper develops a novel performance assessment mechanism for GANS. It allows one to evaluate tracking accuracy of the smoother without prior knowledge of the true values of the system's frequency or coefficients. The extension can be employed to build a parallel bank of filters, which automatically chooses the one which is best matched to unknown and possibly time-varying tracking conditions.
A simple modification of PCR thermal profile applied to evade persisting contamination
- Michał Banasik
- Anna Stanisławska-sachadyn
- Paweł Sachadyn
2016 Full text JOURNAL OF APPLIED GENETICS
The polymerase chain reaction (PCR), one of the most commonly applied methods of diagnostics and molecular biology has a frustrating downside known as the false positive signal or contamination. Several solutions to avoid and to eliminate PCR contaminations have been worked out to date but the implementation of these solutions to laboratory practice may be laborious and time consuming. A simple approach to circumvent the problem of persisting PCR contamination is reported. The principle of this approach lies in shortening the steps of denaturation, annealing, and elongation in the PCR thermal cycle. The modification leads to the radical decline of false positive signals obtained for the no-template controls without affecting the detection of target PCR products. In the model experiments presented here, the signal of negative control was shifted by about ten cycles up above those for the examined samples so that it could be neglected. We do not recommend this solution in PCR diagnostics, where the sensitivity of detection is of the highest priority. However, the approach could be useful to pass by the problem of persisting contamination in quantitative PCR, where the range of quantitation is usually much above the limits of detection.
A simple modification to improve the accuracy of methylation-sensitive restriction enzyme quantitative polymerase chain reaction
- Magdalena Krygier
- Justyna Podolak-Popinigis
- Janusz Limon
- Paweł Sachadyn
- Anna Stanisławska-Sachadyn
2016 ANALYTICAL BIOCHEMISTRY
DNA digestion with endonucleases sensitive to CpG methylation such as HpaII followed by polymerase chain reaction (PCR) quantitation is commonly used in molecular studies as a simple and inexpensive solution for assessment of region-specific DNA methylation. We observed that the results of such analyses were highly overestimated if mock-digested samples were applied as the reference.We determined DNA methylation levels in several promoter regions in two setups implementing different references: mock-digested and treated with a restriction enzyme that has no recognition sites within examined amplicons. Fragmentation of reference templates allowed removing the overestimation effect, thereby improving measurement accuracy.
A simplified behavioral MOSFET model based on parameters extraction for circuit simulations.
- Marek Turzyński
- Wlodek Kulesza
2016 IEEE TRANSACTIONS ON POWER ELECTRONICS
The paper presents results on behavior modeling of general purpose Metal-Oxide Semiconductor Field-Effect Transistor (MOSFET) for simulation of power electronics systems requiring accuracy both in steady-state and in switching conditions. Methods of parameters extraction including nonlinearity of parasitic capacitances and steady-state characteristics are based on manufacturer data sheet and externally measurable characteristics. The MOSFET template is written in the MAST language and simulated in the SABER simulator. Experimental validation of the N-Channel Power MOSFET type IRFP240 (Fairchild Semiconductor) rated at 20A/200V is performed in a DC/DC boost converter. The main features of the developed model have been compared with properties of an analytical MOSFET model and a general MOSFET model embedded to SABER simulator.
A standard analytical method as the common good and pollution abatement measure
- Marek Tobiszewski
- Francisco Pena-Pereira
- Aleksander Orłowski
- Jacek Namieśnik
2016 TRAC-TRENDS IN ANALYTICAL CHEMISTRY
A standard method can be considered as a common-good “resource,” and the solution to “the commons” problems usually lies in societal self-organization. The multi-criteria decision analysis (MCDA) was applied to model complex phenomena, such as the standard selection for imidacloprid determination. In this process, the standard was self-selected by the analytical chemistry society. The results show that analytical chemistry is a subject of rapid development that is not reflected in the modernity of standard methods. A standard method candidate, selected by the analytical society, better fulfills the green (analytical) chemistry principles. The proper standard selection is the most suitable way to control analytical laboratory-related pollution. We suggest more involvement of the analytical society in the standard method management for making analytical chemistry more sustainable and also for the management of analytical chemistry-related pollution.
A structure and design of a novel compact UWB MIMO antenna
- Sławomir Kozieł
- Adrian Bekasiewicz
2016
In the paper, a concept and design procedure of a novel compact MIMO slot antenna is presented. In order to achieve a better filling of available space, individual antennas are constrained to a triangular shape and optimized for a reduced size. The MIMO structure is then assembled using the two of previously designed antennas in orthogonal arrangement. Surrogate-assisted numerical optimization involving variable-fidelity electromagnetic (EM) simulation models is employed to maintain low computational cost of the design process. The footprint of the MIMO design obtained this way is only 634 mm2 and features good isolation in the UWB frequency band.
A structure and design optimization of novel compact microscrip dual-band rat-race coupler with enhanced bandwidth
- Adrian Bekasiewicz
- Sławomir Kozieł
- Włodzimierz Zieniutycz
2016 MICROWAVE AND OPTICAL TECHNOLOGY LETTERS
In the letter, a topology of a novel compact wideband dual-band rat-race coupler has been presented along with its computationally efficient design optimization procedure. Reduction of the circuit size has been achieved by meandering transmission lines of the conventional circuit. At the same time, the number of independent geometry parameters has been increased so as to secure sufficient flexibility of the circuit, necessary in the context of its design optimization for dual-band operation. All relevant geometry parameters of the coupler have been obtained by means of automated simulation-driven design optimization process involving surrogate-based techniques. The operating frequencies of the coupler are 1 GHz and 2 GHz, whereas a -18 dB bandwidth is as wide as 22.5 and 11.3 percent for the lower and upper band, respectively. The miniaturization rate is over 37 percent compared to the conventional structure. The design is validated through full-wave EM analysis at fine discretization as well as through physical measurements of the fabricated circuit prototype.