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    Wyświetlanie 1-11 z 11
    Tytuł:
    Study of microstructure, geometry and properties of laser beam welded joints made of S960QL structural steel and S304 corrosion-resistant steel
    Badanie mikrostruktury, geometrii i własności spoin wykonanych metodą laserową blach ze stali konstrukcyjnej S960QL i stali odpornej na korozję S304
    Autorzy:
    Śliwiński, Piotr
    Piotrowski, Maciej
    Powiązania:
    https://bibliotekanauki.pl/articles/1819237.pdf
    Data publikacji:
    2021
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    spawanie laserowe
    stal konstrukcyjna
    stal nierdzewna
    złącze bimetalowe
    mikrostruktura
    geometria
    własności
    spoina
    S960QL
    S304
    laser welding
    structural steel
    stainless steel
    dissimilar joint
    microstructure
    geometry
    properties
    welded joint
    Opis:
    Contemporary grades of structural steels are produced using a very advanced thermo-mechanical treatment processes, so their properties strongly depend on the obtained structure. Corrosion-resistant austenitic steels have a high hot cracking tendency. Therefore, it is advantageous to use welding technologies, such as laser welding, that limit the size of the joint and its heat-affected zones and thus the deformations caused by the welding process. Laser welding is also characterized by small amount of heat transferred into the material during the process which limits the hot cracking tendency. During the tests, 8 samples made of S960QL steel and S304 steel, were prepared using a Trumpf TruDisk 3302 laser welding device. The produced samples were subjected to macro- and microscopy metallographic tests. Static tensile test and bend test were also performed as well as a hardness Vickers test under a load of 100 N. Good quality joints were obtained, characterized by a small number of welding imperfections. All passed the tensile test, the rupture occurred in the base material of S304 steel. All joints passed the bend test. The hardness of the welded joints ranged from 430-480 HV.
    Współczesne gatunki stali konstrukcyjnych poddawane są bardzo zaawansowanym procesom obróbki cieplno-mechanicznej, przez co ich własności silnie zależą od uzyskanej mikrostruktury. Stale austenityczne odporne na korozję cechuje natomiast skłonność do pękania gorącego. Korzystne zatem jest zastosowanie technologii spawania, takich jak spawanie laserowe, ograniczających wielkość złącza oraz jego strefy wpływu ciepła, a co za tym idzie odkształcenia wywołane procesem spawania. Spawanie laserowe cechuje się również niskimi energiami liniowymi procesu ograniczającymi zjawisko pękania gorącego. Podczas badań przygotowano 8 złączy spawanych ze stali S960QL oraz stali S304wykonanych przy pomocy urządzenia do spawania laserowego firmy Trumpf, model TruDisk 3302. Wykonane złącza zostały poddane badaniom metalograficznym makro- oraz mikroskopowym, statycznej próbie rozciągania oraz zginania, a także dokonano pomiaru twardości metodą Vickersa pod obciążeniem 100 N. Uzyskano trwałe złącza o niewielkiej liczbie niezgodności. Wszystkie złącza pomyślnie przeszły próbę rozciągania, zerwania nastąpiły w materiale rodzimym stali S304. Wszystkie złącza pomyślnie przeszły próby zginania. Twardość spoin wahała się w zakresie 430-480HV.
    Źródło:
    Welding Technology Review; 2021, 93, 1; 15--23
    0033-2364
    2449-7959
    Pojawia się w:
    Welding Technology Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Employee Entitlement: Is There a Universal Approach that We Can Use in the Organizational Settings?
    Autorzy:
    Piotrowski, Piotr
    Besta, Tomasz
    Powiązania:
    https://bibliotekanauki.pl/articles/31340950.pdf
    Data publikacji:
    2022
    Wydawca:
    Katolicki Uniwersytet Lubelski Jana Pawła II. Towarzystwo Naukowe KUL
    Tematy:
    entitlement
    employee
    human resources
    identification
    justice
    counterproductive work behavior
    organizational citizenship behavior
    Opis:
    Employee entitlement has been studied over the years, yet few human resources management scholars and managers expected it to be a common phenomenon, especially among younger employees. Therefore, there is a need for deeper insight into employee entitlement as it has been analyzed in different ways over the last years. Due to dynamically and rapidly changing organizational settings, employee entitlement should be considered as a context-dependent variable. Additionally, it does not have to be perceived explicitly as a negative factor, as there are certain circumstances in which employee entitlement may be beneficial for the organization. Proper understanding of it will be possible through studying the interactions between employee entitlement and other variables, such as organizational identification, identification with coworkers, organizational justice, leader-member exchange, team–member exchange, organizational citizenship behavior, and counterproductive behavior. Factors that might affect the intensity of entitlement are discussed, as well as what we know about methods that can increase or decrease it. This article indicates the gaps and inconsistencies in existing research, simultaneously trying to find solutions and ideas for the difficulties encountered.
    Źródło:
    Roczniki Psychologiczne; 2022, 25, 3; 209-222
    1507-7888
    Pojawia się w:
    Roczniki Psychologiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Implementation of the DSSS method in watermarking digital audio objects
    Autorzy:
    Gajewski, Piotr
    Piotrowski, Zbigniew
    Wojtuń, Jarosław
    Powiązania:
    https://bibliotekanauki.pl/articles/764353.pdf
    Data publikacji:
    2011
    Wydawca:
    Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
    Źródło:
    Annales Universitatis Mariae Curie-Skłodowska. Sectio AI, Informatica; 2011, 11, 3
    1732-1360
    2083-3628
    Pojawia się w:
    Annales Universitatis Mariae Curie-Skłodowska. Sectio AI, Informatica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Antimicrobial effects of propolis on Clostridium difficile strains belonging to the different PCR-ribotypes
    Autorzy:
    Piotrowski, Michał
    Pituch, Hanna
    Obuch-Woszczatyński, Piotr
    Powiązania:
    https://bibliotekanauki.pl/articles/763863.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
    Tematy:
    propolis, MBC, Clostridium difficile
    Opis:
    Clostridium difficile is a Gram-positive, anaerobic rod-shaped bacterium, which is a primary cause of nosocomial diarrhoea. The rising incidence of antibiotic resistance in pathogens such as C. difficile makes the new antibacterial natural products research very important and necessary to conduct. It has been observed that propolis has bactericidal effects. Propolis is a natural resinous product that is manufactured by honeybees (Apis mellifera). The antimicrobial activity of propolis is an important biological property. In spite of the large composition differences of the propolis types, all of them have antimicrobial activity. Twenty strains of the C.difficile belonging to four prominent PCR-ribotypes (RT) (RT017, RT023, RT027, and RT046) were used in research. MBC value were determined by broth dilution method. Propolis samples were obtained from honey bees farm in lubelskie woyevodship. Bactericidal effect of the propolis on C.difficile strains was observed at its concentration of  39 mg/ml.
    Źródło:
    Annales Universitatis Mariae Curie-Sklodowska, sectio C – Biologia; 2016, 71, 2
    2083-3563
    0066-2232
    Pojawia się w:
    Annales Universitatis Mariae Curie-Sklodowska, sectio C – Biologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of generally available online sources of spatial data in the context of appraising historic real estate property
    Analiza ogólnodostępnych internetowych źródeł informacji przestrzennej w kontekście wyceny nieruchomości zabytkowej
    Autorzy:
    Bitner, Agnieszka
    Król, Karol
    Piotrowski, Piotr
    Gajczak, Sabina
    Powiązania:
    https://bibliotekanauki.pl/articles/100564.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet Rolniczy im. Hugona Kołłątaja w Krakowie
    Tematy:
    historic property
    geoportal
    nieruchomość zabytkowa
    wycena
    Opis:
    The paper presents an analysis of generally available (open access) online sources of information – such as geoportals – in order to assess how valuable they are to the work of a real estate property appraiser. As a result of the analysis, it was determined what information is available in geoportals about a specific real estate property, which would be relevant in the valuation process. The property in question is located in the Dolnośląskie (Lower Silesian) region, Średzki district, Środa Śląska municipality. It is a property of a historic-cultural value. Two nation-wide geoportals were examined, as well as regional and local geoportals from the Lower Silesia region, where the valued object is located. Three categories of geoportal assessment were applied in this study, namely: functionality, transparency, and the availability of information about the valued property; the latter being the most important from the property appraiser’s point of view. The analysis showed that geoportals provide information relevant to the real estate property in the valuation process. The levels of information availability in the studied map portals were shown to have varied. Of course, this kind of information requires verification, because not all portals provide the date and time of the last information update. That notwithstanding, they still constitute valuable sources of information about the real estate property.
    W pracy przedstawiono analizę ogólnodostępnych internetowych źródeł informacji jakimi są geoportale, w celu oceny ich przydatności w pracy rzeczoznawcy majątkowego. W wyniku analizy określono jakie informacje o danej nieruchomości, istotne w procesie wyceny, są dostępne w geoportalach. Przedmiotowa nieruchomość położona jest w województwie dolnośląskim, powiecie średzkim, gminie Środa Śląska. Jest ona nieruchomością zabytkową. Badaniom poddano dwa geoportale krajowe oraz geoportale regionalny i lokalny z dolnego śląska, na którego obszarze znajduje się wyceniany obiekt. Do przeprowadzenia niniejszych badań użyto trzech kategorii oceny geoportali, którymi były: funkcjonalność, przejrzystość oraz najważniejsza z punktu widzenia rzeczoznawcy – dostępność informacji o wycenianej nieruchomości. Analiza wykazała, że geoportale dostarczają istotnych w procesie wyceny informacji dotyczących danej nieruchomości. Poziom dostępności informacji w badanych portalach mapowych był zróżnicowany. Oczywiście informacje te wymagają weryfikacji, ponieważ nie wszystkie portale podają datę ostatniej aktualizacji danych, mimo to stanowią cenne źródło informacji o nieruchomości.
    Źródło:
    Geomatics, Landmanagement and Landscape; 2019, 3; 7-16
    2300-1496
    Pojawia się w:
    Geomatics, Landmanagement and Landscape
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Factors influencing disabled people’s professional activity: the success and risk factors
    Autorzy:
    Brzezińska, Anna Izabela
    Kaczan, Radosław
    Piotrowski, Konrad
    Rycielski, Piotr
    Powiązania:
    https://bibliotekanauki.pl/articles/703191.pdf
    Data publikacji:
    2008
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    disability
    occupational activity
    quality of life
    risk factors
    success factors
    Opis:
    The article is the forth one prepared by our team in the series of research on life quality and occupational activity among people with ability limitations („Nauka” 1/2008, „Nauka” 2/2008, „Nauka” 3/2008). The aim of the presented analysis was to create the complex model of determinants for occupational activities of people with disabilities that takes into account the broadest possible look-out. That is why we used the variables from all the fields analyzed in the previous papers in this series i.e. (1) SES; (2) characteristics of disabilities (the type, the degree, the age of acquiring disability); (3) upbringing characteristics in childhood; (4) social network; (5) personal capacities. In order to discover the significant determinants of occupational activities and quality of life among people with different disabilities – which could be both risk and success factors – we have divided the subjects into four groups according to two variables: (1) occupationally active or inactive patients and (2) patients satisfied/dissatisfied with their own income.The group with the largest observed number of risk factors has consisted of the subjects that have been inactive (non-looking for a job) and unsatisfied with their own income. Gender, city size, education, received support, social relations, disability characteristics, upbringing characteristics and personality traits have turned out to be significant risk/success factors. Moreover the results show that in different groups of people with disabilities we find different settings of risk and success factors.
    Źródło:
    Nauka; 2008, 4
    1231-8515
    Pojawia się w:
    Nauka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Factors influencing disabled people’s professional activity: personal and social capital
    Autorzy:
    Brzezińska, Anna Izabela
    Kaczan, Radosław
    Piotrowski, Konrad
    Rycielski, Piotr
    Powiązania:
    https://bibliotekanauki.pl/articles/704283.pdf
    Data publikacji:
    2008
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    handicapped persons
    personal capital
    social capital
    vocational status
    life satisfaction
    Opis:
    The following article is the second in a series (see „Nauka” 1/2008) presenting the results concerning the relationship between personal and social capital and level of life satisfaction among disabled people engaged in various professions. Personal capital is constructed on the basis of early socialization experiences within the family such as: number of responsibilities set by parents, degree of freedom, independent decision making, and parent-child relations. Social capital includes: respondent’s level of education (measured by years of studies), parent’s education, number of acquaintances, number of disabled people among acquaintances, family’s reaction to respondent’s needs and problems, and respondent’s perception of family support. Personal capital is an important predictor of life satisfaction among three subject groups – those engaged in employment activities (employed, formerly employed and searching for work, presently unemployed and not searching for work). Family support was isolated as an important predictor of life satisfaction among all five groups designated by professional status.
    Źródło:
    Nauka; 2008, 2
    1231-8515
    Pojawia się w:
    Nauka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Factors influencing disabled people’s professional activity: personal characteristics
    Autorzy:
    Brzezińska, Anna Izabela
    Kaczan, Radosław
    Piotrowski, Konrad
    Rycielski, Piotr
    Powiązania:
    https://bibliotekanauki.pl/articles/703294.pdf
    Data publikacji:
    2008
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    disability
    personal competencies
    professional status
    quality of life
    Opis:
    The following article is the third publication presenting the results of a study concerning the professional activity of handicapped people (see: „Nauka” 1/2008 and „Nauka” 2/2008). The purpose of this part of the research was to determine whether there is a relationship between professional status, life satisfaction, and various personal competencies among handicapped people. Apart from this, we also wanted to establish what conditions personal competencies by focusing on social-demographic factors and disability characteristics. The tested competencies were isolated from the administered questionnaire using a factor analysis. Seven factors were found: locus of control, level of aspiration, potential for development, effort invested in development, impulsiveness, stamina, and mood. Analysis of the results leads to the following conclusions: (1) personal competencies are significantly related to professional activity for handicapped people, as is level of life satisfaction, (2) personal competencies are related to external factors shaping the development of handicapped people, such as: dwelling, gender, level of disability, and type of disability.
    Źródło:
    Nauka; 2008, 3
    1231-8515
    Pojawia się w:
    Nauka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analytically confirmed presence of psychoactive substances, especially new psychoactive substances in a group of patients hospitalized with mental and behavioural disorders due to the use of psychoactive substances diagnosis
    Autorzy:
    Engelgardt, Piotr
    Krzyżanowski, Maciej
    Piotrowski, Przemysław
    Borkowska-Sztachańska, Malgorzata
    Wasilewska, Agnieszka
    Powiązania:
    https://bibliotekanauki.pl/articles/2085718.pdf
    Data publikacji:
    2022-08-01
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    THC
    epidemiology
    addiction
    new psychoactive substances
    opioids
    amphetamine
    Opis:
    ObjectivesThe study assessed the presence of new psychoactive substances (NPS) in comparison to “classic” drugs in the group of newly admitted patients with mental and behavioral disorders due to the use of psychoactive substances diagnosis (section F11–19 according to ICD-10).Material and MethodsData from anamnesis and the blood and urine samples were collected from 116 patients diagnosed with mental and behavioral disorders due to psychoactive substance use. All of them expressed written informed consent. Analytical confirmation was obtained by highperformance liquid chromatography coupled to tandem mass spectrometry (LC/MS/MS). Liquid-liquid extraction was used for sample preparation.ResultsIn the sample, 108 (93%) of 116 were positive for psychoactive substances (including 96 cases where >1 substance was found), 69% of individuals were tested positive for opioids and 67% for benzodiazepines. Eleven (9%) of 116 patient samples were positive for NPS. We detected 7 different substances. Six of them were synthetic cannabinoids: PB-22, MDMB-CHMICA, MMB-CHMICA, AB-CHMINACA, MMB-FUBINACA, THJ-2201 and one synthetic cathinone 3-CMC.ConclusionsThe prevalence and NPS profile (the predominance of synthetic cannabinoids) are similar in the group of people with addiction to psychoactive substances as in populations of people taking recreational drugs and the overdose patients admitted to the hospital.
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2022, 35, 4; 485-495
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Characteristics of psychiatric inpatients diagnosed with mental and behavioral disorders caused by psychoactive substances (F11-19 block), with a focus on NPS and psychiatric co-morbidities
    Autorzy:
    Engelgardt, Piotr
    Krzyżanowski, Maciej
    Piotrowski, Przemysław
    Borkowska-Sztachańska, Małgorzata
    Wasilewska, Agnieszka
    Kowalkowski, Tomasz
    Powiązania:
    https://bibliotekanauki.pl/articles/2116666.pdf
    Data publikacji:
    2020-03-13
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    addiction
    epidemiology
    psychoactive substances
    drug users
    new psychoactive substances
    psychiatric comorbidity
    Opis:
    ObjectivesThis study analyzed the prevalence of new psychoactive substance (NPS) use in the analyzed group and compared demographic features and psychoactive substance profiles between the 2 subgroups (NPS users, non-NPS users). The secondary measure was used to determine the prevalence of psychiatric comorbidities in study group and to compare demographic features and psychoactive substance profiles between 2 subgroups (the F11–19 only diagnosed group and the F11–19 group with psychiatric comorbidities according to ICD-10).Material and MethodsA 12-month retrospective cross-sectional analysis of medical records compiled for adult psychiatric patients who had been admitted to the Regional Psychiatric Hospital in Olsztyn, Poland, in October 1, 2016 – September 30, 2017 was conducted. After analyzing the available medical records, 157 cases were included and analyzed. Data for the study were collected in a specially designed monitoring card from discharge reports, including data from psychiatric examinations, especially anamnesis. Results: The most commonly declared psychoactive substances were amphetamine (AMF) – 54% and cannabinoids – 46%. The prevalence of NPS use in the study group was 34%. Inpatients taking NPS, as compared with non-NPS users, were younger and more often admitted to hospital through the Emergency Department. It was also found that NPS users more often took AMF or cannabinoids, and less frequently benzodiazepines (BDZ) or opioids. However, the taking of AMF, cannabinoids and BDZ was also age-dependent.ConclusionsThe prevalence of psychiatric comorbidities in the study group was 9%. Inpatients with psychiatric comorbidities were older and took BDZ significantly more often than AMF. In addition, NPS use affects different groups, including a specific group as the analyzed sample, which shows a similar NPS use profile as different groups described in the literature.
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2020, 33, 2; 125-136
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Socio-demographic factors influencing disabled people’s professional activity
    Autorzy:
    Brzezińska, Anna Izabela
    Kaczan, Radosław
    Piotrowski, Konrad
    Sijko, Kamil
    Rycielski, Piotr
    Wiszejko-Wierzbicka, Dorota
    Powiązania:
    https://bibliotekanauki.pl/articles/703454.pdf
    Data publikacji:
    2008
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    professional activity
    disability
    life satisfaction
    socio-demographic influences
    Opis:
    The following article presents the goals and assumptions contained in the project entitled “Psychosocial influences concerning disabled people’s professional activity”. The study was conducted in four stages: (1) document analysis and literature review presenting research concerning how disabled people function on the job market; (2) expert opinions, including disabled people; (3) qualitative studies employing Maxqda2 to analyze information gathered from 311 interviews; and (4) quantitative research on a sample of 1498 participants with various types of disabilities (hearing, sight, physical, somatic, and psychological) conducted in 2007. The following article presents the first set of results obtained, referring to connections on a socio-demographic level (place of residence, gender, age, education, and marital status) as well as those isolating disability characteristics (type, level, and genesis) against degree of life satisfaction. Comparisons were executed for five groups with various employment statuses: employed, those looking for employment who had worked before, those looking for employment who had no previous employment experience, previously employed but had no intention of returning to the workforce and those who had never worked and had no intention of becoming employed. Lowest feelings of life satisfaction were among those not looking for employment whereas highest levels of life satisfaction occurred amongst employed participants. Important risk factors: gender (female), age (elderly), low education, marital status (single), place of residence (non-city dwellers), disability (innate and level).
    Źródło:
    Nauka; 2008, 1
    1231-8515
    Pojawia się w:
    Nauka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-11 z 11

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