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Gdańsk University of Technology

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Publications from the year 2013

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  • Designate CTOD Heat Affected Zone of butt weld, Report No: WOiO/II/76/2013
    • Jakub Kowalski
    • Andrzej Wołoszyn
    • Lech Nadolny
    2013

    Typical (normative) testing of materials and/or welded joints do not answer on all questions about material or welded joint properties. In ship building and off-shore sectors, many strucures requires materials and joint with higher than typical fatigue resistance. Imact tests, which are carried out during welding technology qualification, gives answer about ductility, CTOD tests results about material or welded joint ability to dumpping of fatigue crack propagation. CTOD tests have been carried out on order of Mostostal Pomorze S.A.. The expertise contains: methodology of CTOD tests in accordance with NORSOK M101, BS 7448 Part 1&2, PN-EN ISO 15653:2010; details about fatigue pre-crack procedure, measurement system (with gauge made by GUT) details; results for Heat Affected Zone of butt weld (parent material: S420G2+M, thicness of 80 mm, welding methods: 138/136); and conclusions

  • Designate CTOD of Weld Metal of butt weld, No WOiO/II/108/2013
    • Jakub Kowalski
    • Andrzej Wołoszyn
    • Lech Nadolny
    2013

    Typical (normative) testing of materials and/or welded joints do not answer on all questions about material or welded joint properties. In ship building and off-shore sectors, many strucures requires materials and joint with higher than typical fatigue resistance. Imact tests, which are carried out during welding technology qualification, gives answer about ductility, CTOD tests results about material or welded joint ability to dumpping of fatigue crack propagation. CTOD tests have been carried out on order of Mostostal Pomorze S.A.. The expertise contains: methodology of CTOD tests in accordance with NORSOK M101, BS 7448 Part 1&2, PN-EN ISO 15653:2010; details about fatigue pre-crack procedure, measurement system (with gauge made by GUT) details; results for Weld Metal of butt weld (parent material: S420G2+M, thicness of 80 mm, welding methods: 138/136); and conclusions. Documet should be read with expertise no: WOiO/76/2013

  • Detection of moving objects in images combined from video and thermal cameras
    • Grzegorz Szwoch
    • Maciej Szczodrak
    2013

    An algorithm for detection of moving objects in video streams from the monitoring cameras is presented. A system composed of a standard video camera and a thermal camera, mounted in close proximity to each other, is used for object detection. First, a background subtraction is performed in both video streams separately, using the popular Gaussian Mixture Models method. For the next processing stage, the authors propose an algorithm which synchronizes the video streams and performs a projective transformation of the images so that they are properly aligned. Finally, the algorithm processes the partial back-ground subtraction results from both cameras in order to obtain a combined re-sult, from which connected components representing moving objects may be extracted. The tests of the proposed algorithm confirm that employing the dual camera system for moving object detection improves its accuracy in difficult lighting conditions.

  • Detection of Objects Buried in the Sea Bottom with the Use of Parametric Echosounder
    • Eugeniusz Kozaczka
    • Grażyna Grelowska
    • Sławomir Kozaczka
    2013 Full text Archives of Acoustics

    The paper contains results of a in situ research main task of which was to detect objects buried, partially or completely, in the sea bottom. Object detecting technologies employing acoustic wave sources based on nonlinear interaction of elastic waves require application of parametric sound sources. Detection of objects buried in the sea bottom with the use of classic hydroacoustic devices such as the sidescan sonar or multibeam echosounder proves ineffective. Wave frequencies used in such devices are generally larger than tens of kHz. This results in the fact that almost the whole acoustic energy is reflected from the bottom. On the other hand, parametric echosounders radiate waves with low frequency and narrow beam patterns which ensure high spatial resolution and allows to penetrate the sea bottom to depths of the order of tens of meters. This allows to detect objects that can be interesting, among other things, from archaeological or military point of view.

  • Detection of person presence and its activity in the bathtub
    • Adam Bujnowski
    • Arkadiusz Paliński
    • Piotr Adam Kościński
    • Łukasz Skalski
    • Anna Skurczyńska
    • Jerzy Wtorek
    2013 Full text Journal of Physics : Conference Series

    A practical application of a bioimpedance technique for a detection of a bathing person is presented in the paper. It addresses the possibility of supervising people in the bathtub without voiding of their intimacy. The measurement system installed in a fiber-glass or a plastic bathtub is able to detect a presence of the bathing person, to estimate its activity and thus to detect potentially dangerous events. In the paper a principle of measurement, working prototype and measurements are presented. The proposed method can be useful for supporting and supervising bathing of elders, partially disabled or people with some health state risk during the bath and living alone

  • DETEKCJA OBIEKTU FERROMAGNETYCZNEGO Z ZASTOSOWANIEM MAGNETOMETRÓW SKALARNYCH
    • Kazimierz Jakubiuk
    • Mirosław Wołoszyn
    2013 Full text Poznan University of Technology Academic Journals. Electrical Engineering

    W pracy przedstawiono wyniki analizy możliwości wykrywania obiektów ferromagnetycznych (statki, okręty podwodne, miny itp.) z zastosowaniem dwóch magnetometrów skalarnych. Stosując dwa magnetometry o wysokiej czułości (rzędu pT/Hz0,5) umieszczone w pewnej odległości od siebie pracujące w układzie różnicowym można wykrywać obiekty ferromagnetyczne z pewnej odległości.

  • Determinants And Barriers In The Development Of The Entrepreneurial Orientation In The Polish Higher Education Institutions
    • Maciej Markowski
    • Marcin Forkiewicz
    • Wojciech Popławski
    2013

    The main aim of the paper is to present the results of the research project on the entrepreneurship in the Polish higher education institutions. The project was funded by the Polish National Science Centre and its main aim was to identify the factors that enable, enhance, limit or disable the entrepreneurial potential in higher education institutions. The paper gives an overview of the identified determinants that foster the entrepreneurial orientation in the Polish universities. It also points the key internal and external barriers of that process. The results are presented in the context of the management theory on the one hand and on the other with the theory of higher education, which sometimes are quite contradictory and confusing.

  • DETERMINANTS OF INLAND NAVIGATION ON THE VISTULA FROM WARSAW TO GDAŃSK
    • Adam Bolt
    • Patrycja Jerzyło
    2013 Full text Acta Energetica

    Waterborne transport is the cheapest, the safest and the least harmful to the natural environment. Restoring regular waterway cargo transport will require revitalisation of the existing trans-shipment and logistics infrastructure for commercial inland ports and building new. Transport policy makers must remember that waterborne transport is the most ecological type of transport. It produces only 10% of the gases emitted to the atmosphere by equivalent road transport. Its energy intensity constitutes 30% of the energy intensity of road transport. This article addresses the issues related to inland navigation on the Lower Vistula (Wisła), presenting the river as a waterway, along with its quality and general conditions for navigation. It describes the arrangement and condition of water infrastructure, with particular focus on river ports and the inland waterway fleet.

  • Determinanty jakości usług zdrowotnych związane z działaniami podejmowanymi przez personel szpitala
    • Grzegorz Zieliński
    • Aleksandra Kasińska-Sarnowska
    2013

    W niniejszym rozdziale została omówiona specyfika usług zdrowotnych w kontekście jakości usług związanych z pracą personelu szpitali. Autorzy przybliżyli specyfikę usług zdrowotnych oraz podjęli próbę identyfikacji determinant jakości usług zdrowotnych o kluczowym znaczeniu dla działań podejmowanych przez personel medyczny szpitali. Zaprezentowano także charakterystykę poszczególnych determinant oraz ich podział ze względu na poszczególne grupy zawodowe szpitala.

  • Determinanty orientacji na klienta w nowoczesnym zarządzaniu zkładem opieki zdrowotnej
    • Grzegorz Zieliński
    2013 Prace Naukowe Wyższej Szkoły Bankowej w Gdańsku

    Celem niniejszego opracowania jest prezentacja podstawy orientacji na klienta w zakładach opieki zdrowotnej leczenia otwartego realizowanego w przychodniach. Autor dokonał identyfikacji miejsca orientacji na klienta w Komplekswym Zarządzaniu Jakością, a także wskazał kluczowe determinanty wpływające na zorientowanie na klienta zakładów opieki zdrowotnej.

  • DETERMINATION OF DIFFUSIBLE HYDROGEN CONTENT IN DEPOSITED METAL OF RUTILE ELECTRODES BY GLYCERIN METHOD
    • Dariusz Fydrych
    • Jacek Tomków
    • Aleksandra Świerczyńska
    2013 Metallurgy and Foundry Engineering

    The presence of diffusible hydrogen in welded joints is one of the causes of formation the welding imperfections. Improvement of weldability can be achieved by reducing the hydrogen amount in welded joints. This requires, among others, the finding of sources of hydrogen. For high hydrogen processes the commonly used method of determining the diffusible hydrogen amount is the glycerin method. This paper concerns issues related to the test procedure and the possibility to control the diffusible hydrogen amount in deposited metal.

  • Determination of Formaldehyde and Cyanide Ion in Human Nasal Discharge by Using Simple Spectrophotometric Methods
    • Sylwia Narkowicz
    • Żaneta Polkowska
    • Jacek Namieśnik
    2013 Full text CENTRAL EUROPEAN JOURNAL OF CHEMISTRY

    Environmental tobacco smoke (ETS) contains many toxic compounds which include substances classified as aldehydes (e.g. formaldehyde) and inorganic substances such as cyanide ions. The information on the determination of these compounds in water is available, but the monitoring data on the level of these substances in human body fluids are still lacking. In this work the procedure for determining cyanide ions and formaldehyde in samples of human nasal discharge by simple spectrophotometric technique is presented.

  • Determination of Local Dye Concentration in Hybrid Porous Silica Thin Films
    • Anna Synak
    • Piotr Bojarski
    • Beata Grobelna
    • Leszek Kułak
    • Aneta Lewkowicz
    2013 Journal of Physical Chemistry C

    The idea of determination of local dye concentration in a nanoporous matrix is proposed based on donor − acceptor energy transfer. The method was tested for a Rhodamine 110 − Rhodamine 101 system in silica and methylated silica nanolayers. Evaluation of acceptor (Rhodamine 101) local concentration was carried out by comparing the results of Monte Carlo simulation of energy transfer from donor (Rhodamine 110) to acceptor (Rhodamine 101) with the experimental data of donor fluorescence decay in which concentration was treated as a best fit parameter. The obtained values of acceptor local concentration were about 10 times higher than the mean bulk concentration. Further possible implementations of this method are discussed

  • Determination of Moisture Content Profiles of Spruce Wood After High Temperature Process and Air Drying
    • Jacek Barański
    • Daniel Chuchała
    • Ladislav Dzurenda
    • Tomasz Muziński
    • Kazimierz Orłowski
    2013 Full text Annals of WULS, Forestry and Wood Technology

    The results of moisture content of wood after the process of its drying under high temperature conditions and air drying are presented. Wood samples, namely spruce (Picea abies Karst.) from the northern part of Pomerania region in Poland, were subject of steam and air drying.The aim of experiments was to measure moisture content of wood in its cross sections using moisture meter WRD-100. The samples of thickness 70 mm and length about 1050 mm were used. Wood moisture content was determined after drying process. The samples were machined by the modern narrow-kerf frame sawing machine PRW15M. Measurements of moisture content for steam dried and air dried samples, as reference, allowed to reveal the effect of drying process on moisture content of wood. It has been recognized that steam wood drying causes almost constant amount of moisture in treated material in comparison to air drying one.

  • Determination of pressure drop in flow condensation of HFE7000 in minichannels with account of non-adiabatic effects
    • Dariusz Mikielewicz
    • Rafał Andrzejczyk
    2013

    Flow boiling and flow condensation are often regarded as two opposite or symmetrical phenomena involving the change of phase. There is a temptation to describe both these phenomena with one only correlation, however such method has yet to be suggested. From amongst the structures present in flow boiling and flow condensation at least the annular flow structure seems to be mostly appropriate to the common modeling. However, the shear stress acting between vapour phase and liquid phase is not the same in the respective cases, i.e. flow boiling and flow condensation. Most of modeling of heat transfer in case of condensation inside channels relates the heat transfer coefficient to the friction coefficient. Such approach is rather not commonly used in case of flow boiling. In the latter case, all existing approaches are either the empirical fits to experimental data or form an attempt to combine two major influences to heat transfer, namely the convective flow boiling without bubble generation and nucleate boiling. Generally that is done in a linear or non-linear manner. Alternatively, there is a group of modern approaches based on models which start from modeling a specific flow structure and in such way postulate more accurate flow boiling models, usually pertinent to annular flows.

  • DETERMINATION OF SURFACTANTS IN ENVIRONMENTAL SAMPLES - PART I. CATIONIC COMPOUNDS = Oznaczanie Surfaktantów W Próbkach Środowiskowych. Część I. Związki Kationowe
    • Ewa Olkowska
    • Marek Ruman
    • Anna Kowalska
    • Żaneta Polkowska
    2013 Full text Ecological Chemistry and Engineering S - Chemia i Inżynieria Ekologiczna S

    Compounds from the group of cationic surfactants are widely applied in household, industrial, cleaning, disinfectant, cosmetic and pharmaceutical products as their specific properties (antimicrobial, emulsifying, anticorrosion, softening). After use, cationic surfactants are disposed to wastewater-treatment plants and finally with effluent water to surface waters due to their incomplete degradation. Moreover, they can freely circulate in different environmental compartments including living organisms. It becomes indispensable to recognize in more detail behavior, fate and biological effects of cationic surfactants. This analytical problem can be solved with use sensitive and reliable analytical techniques at sample preparation step and final determination step. In recent years, during isolation analytes from environmental samples mainly were used liquid-liquid extraction (LLE) - liquid matrices or solid-liquid extraction (SLE) - solid matrices. This technique involves application of toxic solvents (chloroform), is time-consuming and interferences are co-extracted. Nowadays, in scientific centers are carried out research to replace this traditional technique. So far, the following techniques were applied: solid-phase extraction (SPE) or it modification (HF-LPME) - liquid samples; accelerated solvent extraction (ASE) and supercritical fluid extraction (SFE) - solid samples. During the determination of total content of cationic surface active agents in environmental samples were used a traditional spectrophotometry technique and potentiometric titration technique. But those techniques are susceptible of interferences on analysis results (anionic and non-ionic compounds). The chromatographic technique (liquid chromatography) applied at the final determination step gives possibility to determine individual cationic surfactants in solvent extracts of environmental samples. The LC systems coupled with mass spectrometers are most powerful tools during such analysis.

  • DETERMINATION OF SURFACTANTS IN ENVIRONMENTAL SAMPLES. PART II. ANIONIC COMPOUNDS
    • Ewa Olkowska
    • Marek Ruman
    • Anna Kowalska
    • Żaneta Polkowska
    2013 Full text Ecological Chemistry and Engineering S - Chemia i Inżynieria Ekologiczna S

    Surfactants (SAA) with negative charge of polar group are named as anionic compounds. They are main constituent of most products containing synthetic surfactants. The linear alkylbenzene sulfonates (LAS), alkyl ethoxysulfates (AES) and alkyl sulfates (AS) are typically applied from this class of compounds. Those surfactants are ingredients of household detergents and cleaners, laundry detergents, cosmetic. Moreover they can be applied in paper, textile and tanning industry as optical brighteners, dispersant, wetting and suspending agents. They can be substrates in the formulation of different products like dyes, pigments, pesticides, exchange resins, plasticizers and pharmaceuticals. Anionic surfactants after use are passed into sewage-treatment plants, where they are partially degraded and adsorbed to sewage sludge (applied in agriculture fields). Finally, anionic SAA or their degradation products are discharged into surface waters and onto bottom sediments, soils or living organisms. Therefore, it is important (widely application, bioaccumulation, toxicity for living organisms) to investigate the environmental fate of those class of compounds in more details. This research involves determination concentration of anionic surfactants with use appropriated analytical techniques in environmental samples The official methodology for determination of anionic SAA in liquid samples is based on the ion-pair reaction of these analytes compounds with methylene blue (MB) and an extraction with toxic solvent chloroform. During isolation step of anionic compounds from solid samples are employed Soxhlet and ultrasonic-assisted extraction techniques with use of methanol or mixture of other organic solvents as extraction medium. To overcome disadvantages of those traditional techniques were applied following techniques at sample preparation step from liquid and solid matrices: solid-phase extraction (SPE) and solid-phases microextraction (SPME); accelerated solvent extraction (ASE), microwave-assisted extraction (MAE), supercritical fluid extraction (SFE), respectively. For estimate total concentration of anionic analytes in extracts the spectrophotometric technique is used (as official regulation). For determination concentration of individual analytes were applied gas (derivatization step requires) and liquid chromatography mainly with mass spectrometry technique. Presence of anionic surface active agents was confirmed in various ecosystems (liquid and solid samples).

  • Determination of Surfactants in Environmental Samples. Part III. Non-Ionic Compounds
    • Ewa Olkowska
    • Marek Ruman
    • Anna Kowalska
    • Żaneta Polkowska
    2013 Full text Ecological Chemistry and Engineering S - Chemia i Inżynieria Ekologiczna S

    Non-ionic surface active agents are a diverse group of chemicals which have an uncharged polar head and a non-polar tail. They have different properties due to amphiphilic structure of their molecules. Commercial available non-ionic surfactants consist of the broadest spectrum of compounds in comparison with other types of such agents. Typically, non-ionic compounds found applications in households and industry during formulation of cleaning products, cosmetics, paints, preservative coatings, resins, textiles, pulp and paper, petroleum products or pesticides. Their are one of the most common use class of surfactants which can be potential pollution sources of the different compartment of environment (because of they widely application or discharging treated wastewaters to surface water and sludge in agricultural). It is important to investigate the behavior, environmental fate of non-ionic surfactants and their impact on living organisms (they are toxic and/or can disrupt endocrine functions). To solve such problems should be applied appropriated analytical tools. Sample preparation step is one of the most critical part of analytical procedures in determination of different compounds in environmental matrices. Traditional extraction techniques (LLE - for liquid samples; SLE - for solid samples) are time and solvent-consuming. Developments in this field result in improving isolation efficiency and decreasing solvent consumption (eg SPE and SPME - liquid samples or PLE, SFE and MAE - solid samples). At final determination step can be applied spectrophotometric technique, potentiometric titrametration or tensammetry (determination total concentration of non-ionic surfactants) or chromatographic techniques coupled with appropriated detection techniques (individual analytes). The literature data concerning the concentrations of non-ionic surfactants in the different compartments of the environment can give general view that various ecosystems are polluted by those compounds.

  • Determination of Terpene Profile in Cape gooseberry (Physalis peruviana L.) with Use of HS-SPME/GCxGC-TOFMS Method
    • Magdalena Kupska
    • Tomasz Wasilewski
    • Renata Marcinkowska
    • Justyna Gromadzka
    • Jacek Namieśnik
    2013

    Fresh fruits and products made of them, especially fruit juice, provide the basic energetic substances (simple and complex sugars) and are a source of health beneficial vitamins, macro and microelements, antioxidants and compounds which are classified together with essential oils (for example terpenes), which positively affect human s health. The terpenes profile of cape gooseberry was determined by headspace solid--phase microextraction coupled with comprehensive two-dimensional gas chromatography with time-of-flight mass spectrometry (HS-SPME/GC×GC-TOFMS). The procedure was based on extraction and preconcentration of analytes to the stationary phase of the fiber from headspace phase and further thermal desorption from the fiber in the GCxGC injector port. The berries were found to contain around 110 terpenes identified by GC×GC—TOFMS.

  • Determination of thiocyanate (biomarkers of ETS) and other inorganic ions in human nasal discharge samples using ion chromatography
    • Sylwia Narkowicz
    • Żaneta Polkowska
    • Mariusz Marć
    • Vasil Simeonov
    • Jacek Namieśnik
    2013 ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY

    Environmental tobacco smoke (ETS) is a mixture of air and tobacco smoke containing more than 4000 chemical substances. In view of the health risks of many of these substances, studies are needed to determine biomarkers of exposure to ETS constituents in people who actively or passively are exposed to the toxic compounds. The methodologies for determining most biomarkers from saliva, urine and blood samples are known, but methods for analyzing these compounds in nasal discharges are not available. The objective of this work was to develop an analytical procedure for the determination of thiocyanate and other biomarker compounds in samples of nasal discharge using ion chromatography.