Repozytorium publikacji - Politechnika Gdańska

Uwarunkowania związane z wykorzystaniem outsourcingu w systemach zakładowej kontroli produkcji

• Piotr Grudowski
• Magdalena Kałużna
• Mateusz Muchlado

2017 Problemy Jakości

Outsourcing znajduje coraz częściej zastosowanie w polskich przedsiębiorstwach jako koncepcja służąca poprawie skuteczności i efektywności procesów, w tym w organizacjach sektora budowlanego stosujących Zakładową Kontrolę Produkcji (ZKP). Celem autorów, przyjętym w niniejszym opracowaniu, jest identyfikacja newralgicznych obszarów ZKP narażonych na zagrożenia wynikające z wykorzystania outsourcingu, a także określenie podstawowych sposobów ograniczania ryzyka związanego z outsourcingiem. Przedstawione sugestie są wynikiem badań przeprowadzonych przez Autorów wśród wybranych producentów sektora budowlanego

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UZIEMIENIA STANOWISK SŁUPOWYCH Z GŁOWICAMI KABLOWYMI

• Stanisław Wojtas
• Józef Jacek Zawodniak

2017 Pełny tekst Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej

Praca zawiera szerokie omówienie oraz porównanie właściwości statycznych i udarowych uziemień stosowanych w systemie elektroenergetycznym do ochrony przeciwprzepięciowej. W końcowych rozdziałach dokonano analizy konstrukcji systemów uziemień z punktu widzenia skuteczności w systemie ochrony układu izolacyjnego od przepięć oraz podano szereg wskazówek dotyczących właściwego doboru uziemień stanowisk słupowych głowic kablowych

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VARIANT DESIGNING IN the PRELIMINARY SMALL SHIP DESIGN PROCESS

• Artur Karczewski
• Janusz Kozak

2017 Pełny tekst Polish Maritime Research

Ship designing is a complex process, as the ship itself is a complex, technical multi-level object which operates in the air/water boundary environment and is exposed to the action of many different external and internal factors resulting from the adopted technical solutions, type of operation, and environmental conditions. A traditional ship design process consists of a series of subsequent multistage iterations, which gradually increase the design identification level. The paper presents problems related to the design of a small untypical vessel with the aid of variant methodology making use of optimisation algorithms. The computer-aided design methodology has been developed which does not need permanent reference to already built real ships and empirical-statistical relations. Possibilities were indicated for integrating together early design stages, and parallel designing of hull shape and parameters.

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Various types of semiconductor photocatalysts modified by CdTe QDs and Pt NPs for toluene photooxidation in the gas phase under visible light

• Martyna Marchelek
• Ewelina Grabowska
• Tomasz Klimczuk
• W. Lisowski
• A. Zaleska-Medynska

2017 APPLIED SURFACE SCIENCE

A novel synthesis process was used to prepare TiO2 microspheres, TiO2 P-25, SrTiO3 and KTaO3 decorated by CdTe QDs and/or Pt NPs. The effect of semiconductor matrix, presence of CdTe QDs and/or Pt NPs on the semiconductor surface as well as deposition technique of Pt NPs (photodeposition or radiolysis) on the photocatalytic activity were investigated. The as-prepared samples were characterized by X-ray powder diffractometry (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM) with energy-dispersive X-ray (EDX) spectroscopy, scanning electron microscopy (SEM), photoluminescence spectrometry (PL), Fourier transform infrared (FT-IR) and Raman spectra, diffuse reflectance spectroscopy (DRS) and BET surface area analysis. The photocatalytic decomposition of toluene in gas phase, activated by light-emitting diodes (LEDs), with the CdTe/Pt nanoparticles-modified TiO2 microspheres, P25, SrTiO3 and KTaO3 semiconductors was investigated under UV–vis and visible irradiation.The results showed that the photoactivity depends on semiconductor matrix. The highest photoactivity under Vis light was observed for KTaO3/CdTe-Pt(R) sample (56% of toluene was decompose after 30 min of irradiation). The efficiency of the most active sample was 3 times higher than result for P25 and two times higher than for unmodified KTaO3.

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Verification of a Novel Method of Detecting Faults in Medium-Voltage Systems with Covered Conductors

• Stanislav Mišák
• Štefan Hamacek
• Mikołaj Bartłomiejczyk

2017 Pełny tekst Metrology and Measurement Systems

This paper describes the use of new methods of detecting faults in medium-voltage overhead lines built of covered conductors. The methods mainly address such faults as falling of a conductor, contacting a conductor with a tree branch, or falling a tree branch across three phases of a medium-voltage conductor. These faults cannot be detected by current digital relay protection systems. Therefore, a new system that can detect the above mentioned faults was developed. After having tested its operation, the system has already been implemented to protect mediumvoltage overhead lines built of covered conductors.

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Verification of Selected Calculation Methods Regarding Shear Strength in Reinforced and Prestressed Concrete Beams

• Krystyna Nagrodzka-Godycka
• Marta Hirsz

2017 Pełny tekst

The purpose of this article was an attempt to compare selected calculation methods regarding shear strength in reinforced and prestressed concrete beams. Several calculation methods were tested. This included codes: PN-EN 1992-1-1:2008 [1], ACI 318- 14 [2] and fib Model Code for Concrete Structures 2010 [3]. The analysis also consists of methods published in technical literature. Calculations of shear strengths were made based on experimental works found in literature. The shear strength ratios Vtest/Vcalc were chosen to be the yardstick of comparison, where Vtest is the experimental shear strength and Vcalc is the calculated shear strength. A wide range of variables including shear span/depth ratio, compressive strength of concrete, longitudinal steel percentage helped to verify the applicability of calculation methods. Although most of authorial techniques proved to be unstable, they succeeded to show that codes' formulas for calculating shear strength could still be improved.

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Virtual designs and reconstructions of amber works: Amber craftsman simulator

• Jacek Lebiedź
• Jerzy Redlarski
• Jacek Rumiński

2017

This paper presents the concept of visualization of amber works in a virtual reality cave. It describes problems encountered during the acquisition, modeling and rendering of geometrical objects distinguished by heterogeneous transparency.

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Visible light photocatalytic activity of ionic liquid-TiO2 spheres: effect of the ionic liquid's anion structure

• Justyna Łuczak
• Marta Paszkiewicz-Gawron
• Marta Długokęcka
• Wojciech Lisowski
• Ewelina Grabowska
• Samanta Makurat
• Janusz Rak
• Adriana Zaleska-Medynska

2017 CHEMCATCHEM

The effect of the ionic liquid’s (IL) anion type ([BIMIM][X], where X= [Br], [PF6] or [OctSO4]) and content on the morphology, surface properties and photoactivity of TiO2 obtained by solvothermal method has been systematically investigated. Our results revealed that the presence of [Br], [OctSO4] anions favors formation of anatase phase, while presence of [PF6] anion causes formation of mixture of anatase and Ti(OH)PO4 phases. The highest photocatalytic activity under visible radiation (approximately four times higher than pristine TiO2) was observed for the TiO2 sample grown in a presence of [BMIM][Br] ionic liquid for IL to TiO2 precursor molar ratio 1:2. Visible light induced phenol degradation was found to be realized mainly by oxygen radical anions, whereas the contributions of the other processes, involving reactions with trapped electrons, holes and hydroxyl radical, are limited in the overall reaction mechanism. Quantum chemical calculations concerning model of anatase vacancy suggest that charge transfer between the bromide anion and molecular oxygen interacting with the vacancy is a source of photoreactivity induced by visible photons.

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Visualization of a lifeboat motion during lowering along ship’s side

• Aleksander Kniat

2017 Pełny tekst Polish Maritime Research

This paper presents description of a computer program for motion visualization of a lifeboat lowered along ship’s side. The program is a post-processor which reads results of numerical calculations of simulated objects’ motions. The data is used to create scene composed of 3D surfaces to visualize mutual spatial positions of a lifeboat, ship’s side and water waving surface. Since the numerical data contain description of a simulation as a function of time it is possible to screen a static scene showing the simulated objects in an arbitrary instance of time. The program can also reproduce a sequence of scenes in the form of animation and control its speed. The static mode allows to view an arbitrary crosssection of the scene, rotate and enlarge specific details and make the image more realistic by hiding invisible lines or shading. The application of the program is aimed at making it possible to assess and analyze numerical calculation results in advance of their experimental verification.

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Visualization of events using various kinds of synchronized data for the Border Guard

• Bartosz Czaplewski
• Sylwester Kaczmarek
• Jacek Andrzej Litka
• Mariusz Miszewski

2017 Pełny tekst Zeszyty Naukowe Akademii Marynarki Wojennej

STRADAR project is dedicated to streaming real-time data in a distributed dispatcher and teleinfor-mation system of the Border Guard. The Events Visualization Post is a software designed for simultaneous visualization of data of different types in BG headquarters. The software allows the operator to visualize files, images, SMS, SDS, video, audio, and current or archival data on naval situation on digital maps. All the visualized data can be synchronized in time.

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Visualization of short-term heart period variability with network tools as a method for quantifying autonomic drive

• Danuta Makowiec
• Beata Graff
• Agnieszka Kaczkowska
• Grzegorz Graff
• Dorota Wejer
• Joanna Wdowczyk-Szulc
• Marta Żarczyńska-Buchowiecka
• Marcin Gruchała
• Zbigniew R. Struzik

2017

We argue that network methods are successful in detecting nonlinear properties in the dynamics of autonomic nocturnal regulation in short-term variability. Two modes of visualization of networks constructed from RR-increments are proposed. The first is based on the handling of a state space. The state space of RR-increments can be modified by a bin size used to code a signal and by the role of a given vertex as the representation of events occurring in a signal. The second mode relies on the matrix representation of the network on the two-dimensional plane. This approach is similar to the accepted method, known as the Poincaré plot representation of time series for evaluation of heart rate variability. The methods introduced will be applied to nocturnal Holter signals recorded from healthy young people and from cardiac transplant recipients. Thus, we obtain a way to filter out the intrinsic heart rate variability from the autonomic drive and then to quantify complexity in the short-term RR-interval variability related to nocturnal rest. Changes in RR-increments in a heart deprived of autonomic control provide insight into beat-to-beat dependences in forces governing the intrinsic heart dynamics

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Visualizing Carotid Bodies With Doppler Ultrasound Versus CT Angiography: Preliminary Study

• Dominik Swieton
• Mariusz Franciszek Kaszubowski
• Anna Szyndler
• Marzena Chrostowska
• Krzysztof Narkiewicz
• Krzysztof Narkiewicz
• Edyta Szurowska
• Zoar Engelman
• Maciej Piskunowicz

2017 AMERICAN JOURNAL OF ROENTGENOLOGY

OBJECTIVE. The purpose of this article is to evaluate the utility of ultrasound in identifying carotid bodies (CBs) in patients with drug-resistant arterial hypertension. SUBJECTS AND METHODS. We enrolled 13 patients with drug-resistant hypertension into a trial for surgical CB excision. CT angiography (CTA) and Doppler ultrasound (DUS) of the cervical arteries were performed before surgery. CBs were identified in a blind manner at both CTA and DUS. CBs were defined at CTA as ovoid avidly enhancing structures at the inferomedial aspect of the carotid bifurcation. At DUS, CBs were defined as ovoid solid structures in the inferomedial aspect of the bifurcation. RESULTS. CBs were identified in 12 of 13 patients (23/26 sides) using CTA and in 11 of 13 patients (18/26 sides) using DUS. Identification of CB with DUS and CTA correlated in 17 of 18 cases; in one instance, CB was identified with DUS but not CTA. There was no statistically significant difference in size and volume of CB measured by both methods. CONCLUSION. Noncarcinogenic CBs can be visualized using DUS, with good correlation of size and location compared with CTA. The findings show that DUS can be reliably used to further examine the role of CBs in cardiovascular disorders and can be used in conjunction with therapies that target CBs.

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Visualizing spatially decomposed intermolecular correlations in the infrared spectra of aprotic liquids

• Maciej Śmiechowski

2017 JOURNAL OF MOLECULAR GRAPHICS & MODELLING

Infrared (IR) spectroscopy is commonly used to study intermolecular interactions in the liquid phase, including solvation phenomena. On the other hand, ab initio molecular dynamics (AIMD) simulations offer the possibility to obtain IR spectra from first principles. Surpassing the experiment, AIMD simulations can deliver additional information on the spatial intermolecular correlations underlying the IR spectrum of the liquid. Although such correlations contribute significantly to the IR spectra of associated liquids, such as water, they are equally important in the case of aprotic solvents, where dipole–dipole interactions are dominant. Here, the extent and non-trivial character of the spatial correlations in the IR spectra are demonstrated on the example of gamma-butyrolactone (GBL), an important solvent in the rechargeable cell industry.

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Voiceless Stop Consonant Modelling and Synthesis Framework Based on MISO Dynamic System

• Grazina Korvel
• Bożena Kostek

2017 Pełny tekst Archives of Acoustics

A voiceless stop consonant phoneme modelling and synthesis framework based on a phoneme modelling in low-frequency range and high-frequency range separately is proposed. The phoneme signal is decomposed into the sums of simpler basic components and described as the output of a linear multiple-input and single-output (MISO) system. The impulse response of each channel is a third order quasi-polynomial. Using this framework, the limit between the frequency ranges is determined. A new limit point searching three-step algorithm is given in this paper. Within this framework, the input of the low-frequency component is equal to one, and the impulse response generates the whole component. The high-frequency component appears when the system is excited by semi-periodic impulses. The filter impulse response of this component model is single period and decays after three periods. Application of the proposed modelling framework for the voiceless stop consonant phoneme has shown that the quality of the model is sufficiently good. Acknowledgments: Polish National Commission for UNESCO Scheme (fellowship grant financed by the Ministry of Science and Higher Education) and the Polish National Science Centre, Dec. No. 2015/17/B/ST6/01874 keywords: speech synthesis; consonant phonemes; phoneme modelling framework; MISO system

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Volatile Organohalogen Compounds Determination with Dispersive Liquid-Liquid Microextraction Applying Solvent Lighter than Water

• Paulina Bigus
• Alicja Szalkiewicz
• Jacek Namiesnik
• Marek Tobiszewski

2017 Current Analytical Chemistry

Background: Volatile organohalogen compounds (VOX) are a group of environmental pollutants that risk the quality of drinking water. These compounds are characterized by certain acute and chronic toxicities, possessing mutagenic properties. Because of these potential risks factors that these compounds cause, the maximum allowable concentrations (MACs) have been established by respective organizations. The abundance of VOX, their potential hazards and legislation are driving factors to develop analytical procedures for their determination in water samples. Objective: The aim of the study is to develop greener DLLME technique for VOX determination in water samples, incorporating extraction solvent lighter than water. To achieve this goal the design of new extraction device is required. Methods: The DLLME-GC-ECD procedure was developed to perform an analysis of water samples in order to determine VOX. The sample preparation step was performed by applying the solvent lighter than water (pentane). Results: The best results regarding sample preparation are obtained when 70 µ L of pentane is used as extractant solvent, 0.5 mL acetone is used as dispersive solvent. The analytical procedure is characterized by good analytical performance with limit of detection within 0.0010 - 0.30 µ g L-1 and precision within 2.4 - 6.6% range. Conclusion: Dispersive liquid-liquid microextraction is a suitable technique for determination of VOX. The newly designed extraction device is suitable for extraction of organic compounds as the area of polymeric parts is greatly reduced in comparison to similar home-made extraction devices. It allows for application of pentane - solvent lighter than water and safer in use than carbon disulfide.

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Voltage Conditions in Low Voltage Grid with Connected Mictogeneration

• Robert Kowalak

2017 Pełny tekst Acta Energetica

The introduction of distributed generation into a low voltage grid may cause voltage problems in it. The paper discusses the effect of microgeneration on voltage levels in a low voltage grid. A real low voltage grid of considerable length was selected for the analysis. The grid primarily supplies residential buildings in a rural area. Results of tests that consider potential measures which could be applied in this grid to improve its voltage conditions are also presented.

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"W miłości jako uchodźca.

• Patryk Różycki

2017

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Wartości dla klientów i organizatorów sympozjum naukowego. Perspektywa modelu biznesu

• Tadeusz Falencikowski
• Bogdan Nogalski

2017

Prezentowane w pracy wyniki badań są efektem kontynuowania przez nas badań nad modelem biznesu sympozjum naukowego . Ponieważ podstawą każdego modelu biznesu, w ujęciu aksjologicznym, są wartości, przeto obecnie dążyliśmy do sformułowania odpowiedzi na postawione uprzednio pytanie problemowe: jakie wartości są możliwe do osiągnięcia przez organizatorów i uczestników sympozjum naukowego? Dążąc do osiągnięcia tego celu zbudowaliśmy kwestionariusz ankiety w dwóch wersjach. Wersję pełną (zał. 1) skierowano do organizatorów cyklu sympozjów naukowych w dyscyplinie nauki o zarządzaniu. Cykl ten jest realizowany przez Instytut Zarządzania Szkoły Głównej Handlowej w Warszawie wespół z Komitetem Nauk o Zarządzaniu PAN pod wspólnym tytułem „Współczesne problemy zarządzania”. Natomiast do uczestników tego sympozjum skierowaliśmy wersję ujmującą tylko wartości dla klienta (zał. 2). Poza metodą ankietową korzystaliśmy z wnioskowania logicznego oraz analizy porównawczej.

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Warunki hydrogeochemiczne i podatność na zanieczyszczenie wód podziemnych w zlewni górnej Raduni

• Małgorzata Pruszkowska-Caceres
• Dawid Potrykus

2017 Przegląd Geologiczny

The paper presents results of long-term studies in the Kashubian Lake district that have been completed with data gathered over the last five years. The purpose of this research was to assess a temporal variability of groundwater chemical composition and to analyze risk of pollutant migration to subsurface water. Investigation indicates local, however, significant anthropogenic influence on a shallow aquifers.The assessment of shallow groundwater vulnerability to pollution has been performed with the use of DRASTIC method. The results revealed that about 60% of the catchment area is moderately high susceptible to pollution and 28% is potentially at high risk. The use of DRASTIC method has helped to explain the causes of a local contaminants in shallow aquifers.

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Wastewater treatment by means of Advanced Oxidation Processes at basic pH conditions: A review

• Grzegorz Boczkaj
• Andre Fernandes

2017 CHEMICAL ENGINEERING JOURNAL

Advanced oxidation processes (AOPs) have been used as an alternative and effective option for treatment of industrial wastewater, especially in the case of the non-biodegradable compounds. Despite of several well developed AOPs, the majority of them are effective only at acidic or neutral pH, namely Fenton related processes, making the list of available effective advanced oxidation technologies strongly limited. In many cases, industrial effluents are formed at basic pH conditions. This paper reviews the state of the art of AOPs exclusively at alkaline pH, the type of compounds and effluents effectively degraded, the influence of pH on the efficiency of the processes, economic evaluation and degradation pathways. Spent caustic, polyester and acetate fiber dye effluents, phenol, acidic and sulfur based compounds, specific dyes and drugs were effectively degraded at basic pH. Factors like point of zero charge, pKa of the compounds, amount of radicals produced and activation of the oxidants are crucial factors that affect the treatment efficiency of AOPs at basic pH. H2O2 and O3 were the cheapest processes while peroxone was the most expensive. The treatment costs were in general too expensive and unrealistic using the methodology used in the literature. The alternative methodology proposed in this paper reduced the treatment costs by three orders of magnitude to values more realistic and economical feasible. Literature regarding treatment of real effluents using AOPs at basic pH is scarce and further research is needed to perform complete analysis. It is important to present some alternatives regarding the treatment of alkaline effluents without pH correction using such technologies.

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