2015 - Publications Repository - Gdańsk University of Technology

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Publications from the year 2015

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Improving the production planning and control process
- Jolanta Łopatowska
2015 Zarządzanie i Finanse
Focusing the activities of a production business on the strategy based on quality entails orientation on meeting the expectations of the customers with respect to the product itself, and the terms of its delivery. The article notes the role of the production planning and control process in improving the quality of the business offer. It identifies the objectives set for the process from the perspective of meeting the expectations of both the external client and internal client, the latter being the production process. The article points to the key problems which hinder meeting customers’ expectations, and indicates the directions of perfecting the process, connected with improvement of the production system throughput, steps taken to attain the information and material flow according to the pull strategy and lean principles, and flexibility combined with production intelligence.
IMPULSE NOISE ASSOCIATED WITH FIRING HANDHELD MILITARY WEAPONS
- Beata Świeczko-Żurek
- Jerzy Ejsmont
- Grzegorz Ronowski
2015
Sports, hunting and military shooting grounds are well known sources of noise that can be disruptive both for people present at those facilities, as well as for people and animals that live nearby. What is more, shooters are also subjected to very painful and dangerous impulse noise. The paper discusses the issues related to the noise immission during firing of small firearms of military type that are typical for Poland. The experiments reported in the paper include measurements of impulse noise while firing weapons of different types like: rifles of caliber 5.56x45, 7.62x39, 7.62x51, .338 Lapua Magnum, .408 Chey Tac and .50 BMG, shotgun cal. 12, pistols/revolvers cal. .38Spec, .357 Mag., 9x19, .380 ACP, 9 mm Makarov and .25. Some of the tested rifles are equipped with muzzle brakes that increase noise emission directed sideway.
In Memoriam Professor Jerzy KAPELEWSKI
- Eugeniusz Kozaczka
2015 Full text Archives of Acoustics
Professor Jerzy Kapelewski In Memoriam
In situ spectroelectrochemical and theoretical study on the oxidation of a 4H-imidazole-ruthenium dye adsorbed on nanocrystalline TiO2thin film electrodes
- Ying Zhang
- Stephan Kupfer
- Linda Zedler
- Julian Schindler
- Thomas Bocklitz
- Julien Guthmuller
- Sven Rau
- Benjamin Dietzek
2015 Full text PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Terpyridine 4H-imidazole-ruthenium(ii) complexes are considered promising candidates for use as sensitizers in dye sensitized solar cells (DSSCs) by displaying broad absorption in the visible range, where the dominant absorption features are due to metal-to-ligand charge transfer (MLCT) transitions. The ruthenium(iii) intermediates resulting from photoinduced MLCT transitions are essential intermediates in the photoredox-cycle of the DSSC. However, their photophysics is much less studied compared to the ruthenium(ii) parent systems. To this end, the structural alterations accompanying one-electron oxidation of the RuIm dye series (including a non-carboxylic RuIm precursor, and, carboxylic RuImCOO in solution and anchored to a nanocrystalline TiO2 film) are investigated via in situ experimental and theoretical UV-Vis absorption and resonance Raman (RR) spectroelectrochemistry. The excellent agreement between the experimental and the TDDFT spectra derived in this work allows for an in-depth assignment of UV-Vis and RR spectral features of the dyes. A concordant pronounced wavelength dependence with respect to the charge transfer character has been observed for the model system RuIm, and both RuImCOO in solution and attached on the TiO2 surface. Excitation at long wavelengths leads to the population of ligand-to-metal charge transfer states, i.e. photoreduction of the central ruthenium(iii) ion, while high-energy excitation features an intra-ligand charge transfer state localized on the 4H-imidazole moiety. Therefore, these 4H-imidazole ruthenium complexes investigated here are potential multi-photoelectron donors. One electron is donated from MLCT states, and additionally, the 4H-imidazole ligand reveals electron-donating character with a significant contribution to the excited states of the ruthenium(iii) complexes upon blue-light irradiation.
In vitro antioxidative and binding properties of phenolics in traditional, citrus and exotic fruits
- Yong-Seo Park
- Milena Cvikrová
- Olga Martincová
- Kyung-Sik Ham
- Seong-Gook Kang
- Yang-Kyun Park
- Jacek Namieśnik
- Adamo Rombolà
- Zenon Jastrzebski
- Shela Gorinstein
2015 FOOD RESEARCH INTERNATIONAL
Many polyphenols bind proteins, therefore our research was focused on the potential of protein binding to polyphenols of investigated fruits and their health-related effects. The contents of polyphenols and related antioxidant activities of traditional, citrus and exotic fruits were compared. The presence of polyphenols (flavonoids and phenolic acids) in the investigated samples and their interaction with human serum albumin (HSA) was studied by HPLC, Fourier Transform Infrared (FT-IR) and three dimensional fluorescence spectroscopy (3D-FL). The highest levels of polyphenols, antioxidant and binding capacities were found in red and blond grapefruits (citrus group), followed by strawberries and apples (traditional group) and mangosteen and kiwi fruit (exotic fruit), which also contained the highest levels of protocatechuic, p-coumaric, ferulic acids and quercetin. In conclusion, for the first time, the interaction of the polyphenols with human serum albumin was evaluated by fluorometry/FTIR. The obtained binding profiles allowed the comparison of three different groups of fruits. A mixture of these fruits can be recommended for consumption.
In vitro studies of antimicrobial activity of Gly-His-Lys conjugates as potential and promising candidates for therapeutics in skin and tissue infections
- Monika Kukowska
- Magdalena Kukowska-Kaszuba
- Krystyna Dzierzbicka
2015 BIOORGANIC & MEDICINAL CHEMISTRY LETTERS
We presented in vitro studies of antimicrobial activity of Gly-His-Lys conjugates that are important point in preliminary biological evaluation of their potential application in skin and tissue therapy. The novel compounds include the conjugation of fatty acids with a modification of the amino acid sequence in the primary structure of Gly-His-Lys.
Increased concentration of Taq DNA polymerase as a solution for GC-rich templates from clinical and environmental samples
- Marta Śpibida
- Marcin Olszewski
- Beata Krawczyk
2015 Acta Biochimica Polonica
DNA polymerase is an enzyme which plays crucial role in replication and DNA repair. It found application in PCR (polymerase chain reaction) where catalyses process of in vitro DNA synthesis. To meet the demands posed by mod- ern diagnostic, molecular biology or genetic engineering it is necessary to improve DNA polymerases to obtain new or better features useful in these fields. So far implemented modifications in majority are based on improved reaction buffers, PCR enhancers and mutagenesis of these proteins. These modification lead to obtaining enzymes with higher thermostability, used for long or difficult amplicons (like GC-rich templates) or resistant to inhibitors from clinical and environmental samples. The aim of our study was determined the influence of native Taq DNA polymerase concentration on its prop- erties to amplification difficult amplicons, especially GCrich temples. Taq DNA polymerase was produced in E. coli cell, purified with using metal affinity chromatography and concentrated to a dozen units per microliter. Amplification difficult amplicons was determined by PCR with GC-rich templates in the gradient concentration of Taq DNA polymerase. Obtained results will be compared to commercial modified polymerases with particular reaction buffer for difficult amplicons. The present studies suggest that it is not necessary to used modified polymerase or improved reaction buffer to amplification difficult amplicons (GC-rich templates). A solution is used to exceeded amount of polymerase.
Induced sheath voltages in 110 kV power cables – case study
- Stanisław Czapp
- Krzysztof Dobrzyński
- Jacek Klucznik
- Zbigniew Lubośny
2015 Full text Archives of Electrical Engineering
This paper considers electric shock hazard due to induced sheath voltages in 110 kV power cables. The purpose of this paper is to find an optimal configuration of the power cable system, taking into account electric shock hazard and ability of the system to transfer maximal power. A computer simulations on a computer model of the local power system, comprising high voltage power cables, were carried out. This model enables to analyse various configurations of the metallic cable sheaths bonding and earthing (single-point bonding, both-ends bonding, cross-bonding) and their impact on induced voltages in the cable sheaths. The analysis presented in the paper shows, that it is possible to find an optimal configuration of the complicated power cable system, in terms of electric shock hazard, maximal power transfer as well as economic aspects.
Induction Motor Bearings Diagnostic Using MCSA and Normalized Tripple Covariance
- Tomasz Ciszewski
- Leon Swędrowski
- Len Gelman
2015
Diagnosis of induction motors, conducted remotely by measuring and analyzing the supply current is attractive with the lack of access to the engine. So far there is no solution, based on analysis of current, the credibility of which allow use in industry. Statistics of IM bearing failures of induction motors indicate, that they constitute more than 40% of IM damage, therefore bearing diagnosis is so important. The article provides an overview of selected methods of diagnosis of induction motor bearings, based on measurement of the supply current. The problem here is the high disturbance components level of the motor current in relation to diagnostic components. The paper presents the new approach to signal analysis solutions, based on statistical methods, which have been adapted to be used by this diagnostic system. First experimental results with use of this method are also presented, they confirm the advantages of this method.
Induction of G2/M phase arrest and apoptosis of human pancreatic cancer BxPC-3 cells by potenet antitumor 1-nitroacridine derivative C-1748
- Barbara Borowa-Mazgaj
- Ewa Augustin
- Jerzy Konopa
- Zofia Mazerska
2015 Acta Biochimica Polonica
Pancreatic ductal adenocarcinoma (PDA) is among the most lethal human cancers, in part because it is insensitive to many chemotherapeutic drugs. Gemcitabine still remains the best chemotherapeutic agent available for the treatment of advanced pancreatic cancer. However, gemcitabine treatment results in only a marginal survival advantage. Thus, there is a strong need for the continuous development of novel therapeutic agents to improve pancreatic cancer therapy. The compound C-1748 is the most active derivative of 1-nitroacridine antitumor agents developed in our laboratory. Strong cytotoxic activity against colon cancer cell lines (HCT8 and HT29) and high antitumor activity against xenografts in nude mice of prostate (LnCaP) and colon carcinoma (HCT8), along with low mutagenic potential and slight myelosuppressive properties allowed the selection of C-1748 for phase I clinical trials. The aim of the current study was to investigate and characterize the cellular response of human pancreatic cancer cell line BxPC-3 to C-1748 treatment. Cell cycle analysis revealed that between 96 h and 192 h of C-1748 treatment, BxPC-3 cells underwent accumulation in the G2/M phase which was preceded by prolonged arrest in the G1 phase. The cell cycle perturbations were accompanied by the appearance of sub-G1 fraction, which can be considered as the apoptotic cells population. C-1748 induced apoptosis was more significant in dose- than time-dependent manner and was confirmed by morphological changes like condensed chromatin and apoptosis-body like structures in DAPI stained cell nuclei. Apoptosis induced by C-1748 was also confirmed by flow cytometry analysis of phosphatydylserine externalization, PARP cleavage and mitochondrial dysfunction. To sum up, major cellular response triggered by C-1748 in BxPC-3 cells was cell cycle arrest in G2/M phase and induction of apoptosis. These results highlight the therapeutic potential of C-1748 in pancreatic cancer and support rationale for its further investigation towards this type of malignancy.
Inequivalence of entanglement, steering, and Bell nonlocality for general measurements
- Marco Quintino
- Tamás Vértesi
- Daniel Cavalcanti
- Remigiusz Augusiak
- Maciej Demianowicz
- Antonio Acín
- Nicolas Brunner
2015 Full text PHYSICAL REVIEW A
Einstein-Podolsky-Rosen steering is a form of inseparability in quantum theory commonly acknowledged to be intermediate between entanglement and Bell nonlocality. However, this statement has so far only been proven for a restricted class of measurements, namely, projective measurements. Here we prove that entanglement, one-way steering, two-way steering, and nonlocality are genuinely different considering general measurements, i.e., single round positive-operator-valued measures. Finally, we show that the use of sequences of measurements is relevant for steering tests, as they can be used to reveal “hidden steering.”
Influence and development of new kinematic systems in flat surface lapping
- Adam Barylski
- Norbert Piotrowski
2015
The face grinding and lapping technology is widely used in the field of the precise and ultraprecise manufacturing. It has become an indispensable technology in the manufacture of many parts. An absence of material restrictions allows machining both metal and non-metallic materials, including technical ceramics [1]. Nowadays there are mainly two kinematic systems in lapping machines [2]. The machining plane-parallel surfaces is executed on double-sided lapping machines. These kind of machine tools have a planetary system. In case of one-side lapping, the standard systems with conditioning rings are mostly used. The tool (lapping plate) has a significant influence over a dimensional and profile accuracy, as well as over a surface quality of workpiece. During machining, the constant profile wear must be ensured. Previous studies on one-sided lapping allow to state that not only parameters of lapping elements (i.e. properties of workpiece, abrasive grains and lapping plate) impact on a lapping efficiency. Influential are also kinematics and dynamics of the process. It is crucial to control an average velocity of lapping (v), a distribution of tangential acceleration (at), a nominal pressure (p), a lapping time (t) and disposal of workpiece in separator [3, 4]. Based on kinematics equations and the tribological models, the dimensionless distribution of the material removal volume and the trajectories of abrasive grains cutting on the lap can be numerically simulated. Obtained information about excessive wear on lapping plate was the starting point to work out non-standard, single-plate lapping systems.
INFLUENCE OF A VERTEX REMOVING ON THE CONNECTED DOMINATION NUMBER – APPLICATION TO AD-HOC WIRELESS NETWORKS
- Magda Dettlaff
- Magdalena Lemańska
- Adriana Dapena
- Maria Jose Souto-Salorio
2015
A minimum connected dominating set (MCDS) can be used as virtual backbone in ad-hoc wireless networks for efficient routing and broadcasting tasks. To find the MCDS is an NP- complete problem even in unit disk graphs. Many suboptimal algorithms are reported in the literature to find the MCDS using local information instead to use global network knowledge, achieving an important reduction in complexity. Since a wireless network continuously changes due to, for ex- ample, power restrictions, sensors faults, sensors disconnection etc., it is needed to adapt the MCDS to the new network configuration. In this paper, we study the influence of removing a node on the MCDS and we propose a localized reconfiguration algorithm to obtain the MCDS of the new network topology.
Influence of Antimony Substitution on Spontaneous Strain and Thermodynamic Stability of Lanthanum Orthoniobate
- Aleksandra Dorota Mielewczyk-Gryń
- Sebastian Lech Wachowski
- K.i. Lilova
- X. Guo
- Maria Gazda
- A. Navrotsky
2015 Full text CERAMICS INTERNATIONAL
The analysis of the antimony substitution influence on temperature dependence of unit cell distortion has been done. The values of spontaneous strain and Landau order parameter for three different antimony contents varied had been calculated. The phase transition occurring for antimony substituted lanthanum orthoniobate was found to be second order. The high temperature solution calorimetry method has been used to investigate the influence of antimony substitution on stability of both monoclinic and tetragonal phases of antimony substituted lanthanum orthoniobate. It has been found that antimony substitution does not influence the stability of monoclinic phase. The average value of enthalpy of formation of antimony substituted lanthanum orthoniobate with fergusonite structure has been found to be equal to -132.0 ± 0.8 kJ/mol, while in the case of scheelite structure -126.4 ± 1.5 kJ/mol.
Influence of composition of raw wastewater on removal of nitrogen compounds in multistage treatment wetlands
- Magdalena Gajewska
2015 Full text Environment Protection Engineering
Influence of composition of raw wastewater on the efficiency of organic matter and nitrogen removal in multistage treatment wetlands has been examined. Commonly used indicators, like COD/BOD5 and BOD5/TN ratio, determining wastewater susceptibility to biodegradation in conventional treatment technologies were assessed. It was confirmed that multistage treatment wetland may be used for treatment of wastewater with high loads of organic pollutants and unfavorable composition for a biological treatment expressed by the ratio of COD/BOD5 and BOD5/TN equal to 2.7 and 0.7, respectively. 1
INFLUENCE OF DREDGER POWER PLANT TYPE AND DREDGER SIZE ON OUTPUT OF POWER PLANT INSTALLED ON TRAILING SUCTION HOPPER DREDGER
- Damian Bocheński
2015 Full text Journal of Polish CIMEEAC
This paper presents results of investigations dealing with influence of parameters characterizing size of suction hopper dredger as well as type of power system on magnitude of total output of combustion engines installed in dredger power plant.
Influence of electropolymerization conditions on the morphological and electrical properties of PEDOT film
- Karolina Cysewska
- Jakub Karczewski
- Piotr Jasiński
2015 ELECTROCHIMICA ACTA
In this work the effects of electropolymerization conditions on the morphological properties and conductivity of poly(3,4-ethylenedioxythiophene) (PEDOT) film have been studied. PEDOT films were electrochemically synthesized in a one step process from acetonitrile solution containing 3,4-ethylenedioxythiophene (EDOT) and lithium perchlorate. Based on atomic force microscopy, scanning electron microscopy, cyclic voltammetry and impedance spectroscopy measurements, the morphological properties such as the of structure, double layer capacitance and thus the polymer surface area have been determined. It was shown that depending on the deposition conditions applied, different structures and film surface area could be obtained. Impedance measurements performed during deposition showed different resistance behavior and conductivity. The relationship between structure and conductivity of PEDOT film obtained under different deposition conditions has been discussed.
Influence of external climate on natural ventilation performance in buildings
- Romana Antczak-Jarząbska
2015
Natural ventilation is driven by either buoyancy forces or wind pressure forces or their combinations that inherit stochastic variation into ventilation rates [ CITATION Hun99 \l 1045 ]. We now that these factors have influence on air flow speed and thermal comfort inside building. This work examines the relationship between external climate and natural ventilation including thermal comfort. The work tries in the first instance to seek out the external climate consequence in Gdansk of natural ventilation. The next instance will find out to how natural ventilation influence on thermal comfort inside building. The primary goal of this study is to offer a better understanding how large an impact on correct operation of ventilation and comfort can have the external climate conditions. The researches were conducted in Gdansk for a typical single family building following thermal-renovation.
Influence of meniscus shape in the cross sectional plane on the knee contact mechanics
- Piotr Łuczkiewicz
- Karol Daszkiewicz
- Wojciech Witkowski
- Jacek Chróścielewski
- Witold Zarzycki
2015 JOURNAL OF BIOMECHANICS
We present a three dimensional finite element analysis of stress distribution and menisci deformation in the human knee joint. The study is based on the Open Knee model with the geometry of the lateral meniscus which shows some degenerative disorders. The nonlinear analysis of the knee joint under compressive axial load is performed. We present results for intact knee, knee with partial and complete radial posterior meniscus root tears and knee with total meniscectomy of medial or lateral meniscus. We investigate how the meniscus shape in the cross sectional plane influences knee-joint mechanics by comparing the results for flat (degenerated) lateral and normal medial meniscus. Specifically, the deformation of the menisci in the coronal plane and the corresponding stress values in cartilages are studied. By analysing contact resultant force acting on the menisci in axial plane we have shown that restricted extrusion of the torn lateral meniscus can be attributed to small slope of its cross section in the coronal plane. Additionally, the change of the contact area and the resultant force acting on the menisci as the function of compressive load is investigated.
Influence of nanoparticle concentration on convective heat transfer of water-Al2O3 nanofluids inside horizontal tubes
- Janusz Cieśliński
- Przemysław Kozak
2015
This work presents preliminary results of the experimental investigation of the forced convection heat transfer of water-Al2O3 nanofluids inside stainless steel tube with 8 mm internal diameter and 2000 mm length. Nanoparticles were tested at the concentrations of 0.01%, 0.1%, 1% and 5% by weight and the Reynolds number range encompasses laminar as well as turbulent flows.