Search results for: problems

• Problems of Railway Noise-A Case Study

  Publication

  • M. Szwarc
  • B. Kostek
  • K. Józef
  • M. Szczodrak
  • A. Czyżewski

  - International Journal of Occupational Safety and Ergonomics - Year 2011

  Under Directive 2002/49/EC relating to the assessment and management of environmental noise, all European countries are obliged to model their environmental noise levels in heavily populated areas. Some countries have their own national method, to predict noise but most have not created one yet. The recommendation for countries that do not have their own model is to use an interim method. The Dutch SRM II scheme is suggested for...

• Cyanides in the environment—analysis—problems and challenges

  Publication

  • E. Jaszczak-Wilke
  • Ż. Polkowska
  • S. Narkowicz
  • J. Namieśnik

  - ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH - Year 2017

  Cyanide toxicity and their environmental impact are well known. Nevertheless, they are still used in the mining, galvanic and chemical industries. As a result of industrial activities, cyanides are released in various forms to all elements of the environment. In a natural environment, cyanide exists as cyanogenic glycosides in plants seeds. Too much consumption can cause unpleasant side effects. However, environmental tobacco smoke...

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• Boundary problems for fractional differential equations

  Publication

  • T. Jankowski

  - APPLIED MATHEMATICS LETTERS - Year 2014

  In this paper, the existence of solutions of fractional differential equations with nonlinear boundary conditions is investigated. The monotone iterative method combined with lower and upper solutions is applied. Fractional differential inequalities are also discussed. Two examples are added to illustrate the results.

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• Problems of Railway Noise—A Case Study

  Publication

  • M. Szwarc
  • B. Kostek
  • J. Kotus
  • M. Szczodrak
  • A. Czyżewski

  - International Journal of Occupational Safety and Ergonomics - Year 2011

  Under Directive 2002/49/EC relating to the assessment and management of environmental noise, all European countries are obliged to model their environmental noise levels in heavily populated areas. Some countries have their own national method, to predict noise but most have not created one yet. The recommendation for countries that do not have their own model is to use an interim method....

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• Endocrine Disrupting Compounds – Problems and Challenges

  Publication

  • B. Kudłak
  • N. Jatkowska
  • K. Owczarek
  • Z. Mazerska
  • J. Namieśnik

  - Year 2015

  In this chapter, information about some of the estrogenic compounds and their environmental fate and biological influence can be found. Special attention is paid to the review of the analytical approaches used at the stages of detection and determination of Endocrine Disrupting Compounds (EDCs) in the environmental samples. Also, a brief characterization of both cellular and non-cellular bioassays is presented. The discovery of...

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• Resonance problems in UHV transmission lines

  Publication

  • J. Klucznik
  • Z. Lubośny
  • K. Dobrzyński
  • S. Czapp

  - Year 2017

  The paper presents resonance phenomena observed in 400 kV transmission lines in the Polish power system. Two events are analysed, when shunt reactors used for reactive power compensation, caused overvoltages and overcurrent protection tripping as a result of resonance. An oscillographic fault recordings from protection devices are compared to time domain simulation results. The obtained simulation results match fault recordings,...

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• Problems of Flaking in Strengthening Shaft Burnishing

  Publication

  • S. Dzionk
  • B. Ścibiorski
  • W. Przybylski

  - Year 2019

  The article presents the results of testing the surface condition of shafts manufactured by a strengthening rolling burnishing process. The shafts with a hardness about 220 HB were burnished with a roller with different force. Researches were carried out with particular attention to the structure of the outflowing material in the tool zone during burnishing process. The article presents the results of the examinations of burnished...

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• Problems and Solutions of Software Design in Scrum Projects

  Publication

  • J. Miler
  • K. Kajdy

  - Annals of Computer Science and Information Systems - Year 2018

  The aim of the paper is to identify the problems and solutions of the software design in Scrum project as well as to analyze the effectiveness of the solutions. Through a series of workshops with 4 experts from IT industry and academia we have identified 52 problems and 99 unique solutions. In this paper we present a list of 10 common problems and 5 solutions for each problem selected by the number of sources. The effectiveness...

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• An Industrial Survey on Business Analysis Problems and Solutions

  Publication

  • P. Marciniak
  • A. Jarzębowicz

  - Advances in Intelligent Systems and Computing - Year 2016

  The paper focuses on the problems reported by business analysts which have a negative impact on their work and on the applicability of available business analysis (BA) techniques as solutions to such problems. A unified set of BA techniques was developed on the basis of 3 industrial standards associated with IIBA, REQB and IREB certification schemes. A group of 8 business analysts was surveyed to list problems they encounter in...

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• A Survey on Identifying and Addressing Business Analysis Problems

  Publication

  • A. Jarzębowicz
  • P. Marciniak

  - Foundations of Computing and Decision Sciences - Year 2017

  Despite the growing body of knowledge on requirements engineering and business analysis, these areas of software project are still considered problematic. The paper focuses on problems reported by business analysts and on applicability of available business analysis techniques as solutions to such problems. A unified set of techniques was developed on the basis of 3 industrial standards associated with IIBA, REQB and IREB certification...

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• Swarm Algorithms in Modern Engineering Optimization Problems

  Publication

  • A. Pałkowski
  • G. Redlarski

  - Year 2013

  Complexity of today engineering problems is constantly increasing. Scientists no longer are facing issues, for which simple, mathematical programming methods are sufficient. Issues like autonomic vehicle navigation or classification are considered to be challenging, and although there exist valid means to solve them, in some cases there still is some place for improvement. With emergence of a new type of optimization techniques...

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• Electromagnetic Problems Requiring High-Precision Computations

  Publication

  • T. Stefański

  - IEEE ANTENNAS AND PROPAGATION MAGAZINE - Year 2013

  An overview of the applications of multiple-precision arithmetic in CEM was presented in this paper for the first time. Although double-precision floating-point arithmetic is sufficient for most scientific computations, there is an expanding body of electromagnetic problems requiring multiple-precision arithmetic. Software libraries facilitating these computations were described, and investigations requiring multiple-precision...

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• SOME PROBLEMS OF SUPPORTING OFFSHORE WIND TURBINES

  Publication

  • J. Przewłócki
  • P. Iwicki

  - Year 2016

  Basic problems of foundations of sea wind turbines are considered in this paper. This aims to search for solutions to optimize supporting of the offshore turbines with a size greater than 10 MW. The types of foundations, their basic features, including most important dimensions, applications as well as general design considerations are discussed. Numerical model of the offshore turbine and some preliminary computations for a case...

• Problems and Perspectives in Management

  Journals

  ISSN: 1727-7051

• Linear revitalization - problems and challenges. Discursive article

  Publication

  • A. Sas-Bojarska

  - PROBLEMY ROZWOJU MIAST Kwartalnik Naukowy - Year 2017

  The aim of the article, defined by the author as discursive, is to give the answer as to whether within ‘revitalization’ we should distinguish the notion of ‘linear revitalization’ – not yet defined in Polish and English-language literature. The author presents the thesis that we should do so by presenting the idea, its specific character and its role. This kind of action seems to have, in the author’s opinion, a positive influence...

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• Loudness Scaling Tests in Hearing Problems Detection

  Publication

  • B. Kostek
  • P. Suchomski
  • P. Odya

  - Year 2015

  The number of people using portable audio players has increased significantly over the recent years. This implies the rise in the number of people having hearing loss problems. Therefore, there is a need to find appropriate procedures that simplify the process of the hearing problem detection. Investigations performed show that audiometric tests may not be sufficient to assess hearing in young people. Contrarily, the obtained results...

• Investigation and operation problems of metal tanks in Poland

  Publication

  • J. Ziółko
  • A. Perliński

  - Year 2011

  The paper consists of three parts concerned with steel cylindrical, vertical tank for liquid fuel. In the first part the present trends in tank design and building in Poland are described. The main are: · reduction of environment contamination danger caused by tank leakage and hydrocarbons evaporation, · increasing capacity of new tanks (100000 m3 and more) due to economic factor - reduction of steel amount per m3 of storage capacity....

• Optical switching technologies: problems and proposed solution

  Publication

  • A. Utreras
  • H. Licenko
  • P. Kisała
  • R. Romaniuk
  • G. Yussupova
  • R. S. Romaniuk

  - Year 2015

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• On statistical linear inverse problems in fishery acoustic

  Publication

  • M. Moszyński

  - HYDROACOUSTICS - Year 2007

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• Boundary problems for differential equations with advanced arguments

  Publication

  • A. Dyki

  - Nonlinear Studies - Year 2008

  Dyskutowane są zagadnienia brzegowe dla równań różniczkowych z wyprzedzonymi argumentami. Przedstawione są warunki dostateczne istnienia quasirozwiązań i rozwiązań rozważanych zagadnień.

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• Selected problems of high-power sonar sources

  Publication

  • K. Zachariasz
  • W. Lis
  • Z. Wojan

  - Year 2009

  Specyfika pracy współczesnych sonarów aktywnych wymaga cyklicznego wypełnienia energią szerokiego sektora sondowania. W przypadku użycia płaskich anten nadawczych oznacza to zwykle konieczność skupienia energii akustycznego impulsu nadawczego na stosunkowo małej powierzchni czynnej przetwornika elektroakustycznego (kluczowe znaczenie odgrywa tu częstotliwość pracy systemu). Zjawiska towarzyszące dużym poziomom źródła mogą powodować...

• Selected problems of navigation of educational mobile robot

  Publication

  • A. J. Grono
  • M. A. Dąbkowski
  • P. Niklas
  • G. Redlarski

  - Solid State Phenomena - Year 2009

  W artykule przedstawiono ideę sterowania układem autonomicznego robota mobilnego skonstruowanego do celów edukacyjnych. Opisano strukturę mechaniczną układu, układy sensorów oraz zakres możliwości wynikających z działania oprogramowania robota.

• JABAT Middleware as a Tool for Solving Optimization Problems

  Publication

  • D. Barbucha
  • I. Czarnowski
  • P. Jędrzejowicz
  • E. Ratajczak-Ropel
  • I. Wierzbowska

  - Year 2010

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• Moral problems in the process of polish economy transformation

  Publication

  • K. Kinach-Brzozowska

  - Year 2006

  Artykuł zawiera uwagi dotyczące problemów etycznych okresu transformacji w Polsce. Podane są przykłady kodeksów i zasadność ich wprowadzenia w firmach. Artykuł zawiera też informacje o realizowanym na Wydziale Zarządzania i Ekonomii PG programie ''Etyka biznesu'' oraz uwagi studentów dotyczące ciekawych problemów,o które program jest poszerzany.

• Trends and problems of contemporary urbanization processes in Poland

  Publication

  • P. Lorens

  - Year 2006

  Artkuł obejmuje przegląd współczesnych problemów planowania przestrzennego i rozwoju urbanistycznego Polski w okresie od transformacji społeczno - ekonomicznej początku lat 1990-tych. Zawarto w nim zarówno omówienie sytuacji polskich miast po transformacji, współczesne oraz rozwijające się trendy urbanizacyjne.

• Analytics of dew and fog samples - problems and challenges

  Publication

  • J. Namieśnik
  • Ż. Polkowska
  • K. Klimaszewska

  - Year 2007

  Badania analityczne próbek mgły i rosy mogą dostarczyć wielu interesujących informacji o stanie powietrza atmosferycznego i procesów, które w nim zachodzą. Badania takie stanowią jednak poważne wyzwanie analityczne m.in. ze względu na: konieczność dysponowania odpowiednimi urządzeniami do pobierania próbek, małe objętości próbek jakie udaje się zebrać w określonym czasie, co w istotnym stopniu determinuje wybór techniki ich przygotowania...

• Uralic linguistic terminology: selected problems and examples

  Publication

  • K. Wojan
  • P. Łozowski

  - Biuletyn Polskiego Towarzystwa Językoznawczego - Year 2020

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• Elastostatic problems in multicomponent, multilayered periodic composites

  Publication

  • M. Wągrowska
  • V. Bagdasaryan
  • O. Szlachetka

  - Przegląd Naukowy Inżynieria i Kształtowanie Środowiska - Year 2018

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• Cognitive impairment and dementia - problems of geriatric physiotherapy

  Publication

  • J. Kowalska
  • J. Szczepańska-Gieracha
  • J. Rymaszewska

  - Fizjoterapia - Year 2010

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• Problems of surface topography with oil pockets analysis

  Publication

  • W. Grabon
  • P. Pawlus
  • L. Galda
  • A. Dzierwa
  • P. Podulka

  - Journal of Physics: Conference Series - Year 2011

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• Fractional Derivatives Application to Image Fusion Problems

  Publication

  • S. Motłoch
  • G. Sarwas
  • A. Dzieliński

  - SENSORS - Year 2022

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• Hybrid Obfuscation Technique for Reverse Engineering Problems

  Publication

  • A. Mahfoud
  • A. Md.
  • A. Azim
  • N. Mohd
  • N. Admodisastro

  - Journal of Computer Science & Computational Mathematics - Year 2020

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• Safely problems of partially filled liquid tanks.

  Publication

  • K. Trębacki

  - Year 2004

  Przedstawiono równania ruchu zbiorników wypełnionych cieczą. Przeprowadzono obliczenia numeryczne tychże zbiorników w przypadkach niebezpiecznych ze względów ekologicznych.

• Problems of flat surface lapping : chapter 16

  Publication

  • A. Barylski

  - Year 2005

  Przedstawiono problemy docierania powierzchni płaskich w układach jednotarczowych. Omówiono analityczne i numeryczne modele kinematyki docierarek konwencjonalnych i niestandardowych, obróbkę docierakami aktywizowanymi w sposób swobodny i wymuszony, jednolitymi i dwumetalowymi. Zaprezentowano wyniki obróbki narzędziami ścierno-metalowymi elementów ceramicznych.

• Problems of exact generation ofinverter output voltage

  Publication

  • H. Abu-Rub
  • J. Guziński
  • Z. Krzemiński
  • H. Toliyat

  - ELECTRIC POWER COMPONENTS AND SYSTEMS - Year 2002

  W pracy przedstawiono nową modyfikację modulatora szerokości impulsów. Rozważono problemy generacji dokładnej wartości napięcia wyjściowego falownika. Zaproponowano dwie metody generacji małej wartości napięcia.

• BEARING SYSTEMS OF WIND TURBINES – MAINTENANCE PROBLEMS

  Publication

  • M. Wasilczuk
  • R. Gawarkiewicz
  • M. Libera
  • F. Wasilczuk
  • G. Kinal

  - TRIBOLOGIA - Year 2015

  W praktyce eksploatacyjnej turbin wiatrowych o tradycyjnej konstrukcji (przekładniowych) obserwowana jest duża awaryjność przekładni, a zwłaszcza łożysk tocznych szybkoobrotowych wałów przekładni. W Polsce na zlecenie właściciela dużej farmy wiatrowej, firmy Energa Wytwarzanie S.A., Politechnika Gdańska we współpracy z Politechniką Poznańską i Akademią Górniczo Hutniczą podjęły badania mające na celu diagnozowanie przyczyn uszkodzeń...

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• Problems of varistor quality assessment during exploitation

  Publication

  • J. Smulko
  • M. Olesz
  • L. Hasse
  • L. Kaczmarek
  • G. Lentka

  - Metrology and Measurement Systems - Year 2012

  Varistors are commonly used elements which protect power supply networks against high-voltage surges or lightning. Therefore, quality and endurance of these elements is important to avoid losses when an expensive laboratory equipment would not be protected from random overvoltages. Additionally, excessive leakage currents generate serious costs due to high energy consumption. The paper presents shortly properties of varistors that...

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• Problems and chellenges to determine pesticide residues in bumblebees

  Publication

  • Ż. Bargańska
  • D. Lambropoulou
  • J. Namieśnik

  - CRITICAL REVIEWS IN ANALYTICAL CHEMISTRY - Year 2018

  Bumblebees play an important role in t he pollination process of many crops and flowers. Therefore, taking action to protect and assess the impact of p esticides on these insects is fully justi fied. Pesticides may cause mortality and also sub-lethal effects that are not always directly visible. Bumblebees, like honeybees, can be used as indicators for environmental monitoring contamination. Two approaches are mainly used for the...

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• ON AXIALLY SYMMETRIC SHELL PROBLEMS WITH REINFORCED JUNCTIONS

  Publication

  • V. Konopińska-Zmysłowska
  • V. Eremeev

  - Year 2018

  Within the framework of the six-parameter nonlinear resultant shell theory we consider the axially symmetric deformations of a cylindrical shell linked to a circular plate. The reinforcement in the junction of the shell and the plate is taken into account. Within the theory the full kinematics is considered. Here we analyzed the compatibility conditions along the junction and their in uence on the deformations and stressed state.

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• Problems of Education in the 21st Century

  Journals

  ISSN: 1822-7864 , eISSN: 2538-7111

• Problems of Psychology in the 21st Century

  Journals

  ISSN: 2029-8587

• CURRENT PROBLEMS IN DERMATOLOGY-US

  Journals

  ISSN: 1040-0486

• Current Problems in Diagnostic Radiology

  Journals

  ISSN: 0363-0188

• Problems of Management in the 21st Century

  Journals

  ISSN: 2029-6932

• Voprosy Onomastiki-Problems of Onomastics

  Journals

  ISSN: 1994-2400 , eISSN: 1994-2451

• Problems of modern science and education

  Journals

  ISSN: 2304-2338 , eISSN: 2413-4635

• Mathematical Modelling of Engineering Problems

  Journals

  ISSN: 2369-0739

• Actual Problems of International Relations

  Journals

  ISSN: 2663-8959

• INVERSE PROBLEMS IN SCIENCE AND ENGINEERING

  Journals

  ISSN: 1741-5977 , eISSN: 1741-5985

• Language Problems and Language Planning

  Journals

  ISSN: 0272-2690 , eISSN: 1569-9889