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    Wyświetlanie 1-24 z 24
    Tytuł:
    Automation and its effect on STEM occupations. Economic and ethical impact
    Autorzy:
    Gapinski, A. J.
    Powiązania:
    https://bibliotekanauki.pl/articles/409383.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    automation
    workforce
    STEM
    Opis:
    The article discusses the effect of automation on occupations in general and more specifically on STEM jobs in the USA. The analysis considers characteristics of occupations and their classification into routine and non-routine tasks followed by the examination of occupations’ susceptibility to transformations due to advancements in computer technologies and resulting automation. STEM occupations and their various vulnerability to automation are discussed. Future trends which will affect STEM workforce of various industries are addressed. The socio-economic and ethical ramifications of the technological changes in the USA and beyond are discussed as well.
    Źródło:
    Research in Logistics & Production; 2017, 7, 5; 391-407
    2083-4942
    2083-4950
    Pojawia się w:
    Research in Logistics & Production
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Role of Renewable Energy Sources in the USA Energy Production – Part II
    Autorzy:
    Gapinski, A. J.
    Powiązania:
    https://bibliotekanauki.pl/articles/409443.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    renewable energy
    energy resources
    Opis:
    The article analyzes the renewable energy resources in the USA including Pennsylvania. Contributions of the most important renewable technologies in energy production are described: solar power, wind energy, hydroelectric, nuclear, and geothermal. The contribution of other resources such as hydrogen and fuel cells, bio-energy resources due to their negligible level of impact is not addressed. Some aspects of political considerations affecting policies and regulations related to energy production in the USA and beyond are also addressed. Academia’s response to new demands for graduates in alternative and renewable energies with an example of academic engineering degree program is included.
    Źródło:
    Research in Logistics & Production; 2016, 6, 6; 523-535
    2083-4942
    2083-4950
    Pojawia się w:
    Research in Logistics & Production
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On factors affecting trust in project management
    Autorzy:
    Gapinski, Andrzej J.
    Powiązania:
    https://bibliotekanauki.pl/articles/409486.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    trust
    project management
    affecting factors
    Opis:
    The article investigates the factors affecting a trust in project management. The factors influencing trust in program and project management classified as either a cognitive-based or an affect-based are defined and analyzed in both manufacturing and service sectors based on survey data collected from project managers of various industries and service sectors firms in USA and abroad. The article alalyzes the trust affecting factors in both vertical such as supervisor-subordinate and horisontal such as peer-to-peer type of dependency among project management processes participants. The article follows two prevuiously published articles by author on trust in project management.
    Źródło:
    Research in Logistics & Production; 2019, 9, 1; 39-47
    2083-4942
    2083-4950
    Pojawia się w:
    Research in Logistics & Production
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Role of Renewable Energy Sources in USA Energy Production – Part I
    Autorzy:
    Gapinski, A. J.
    Powiązania:
    https://bibliotekanauki.pl/articles/409556.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    renewable energy
    energy resources
    Opis:
    The article analyzes the present role of renewable energy resources in U.S. energy production including Pennsylvania. Comparisons are being made to European Union (EU-27) block, the Organization for Economic Co-operation and Development (OECD) block, and some developing and third world countries. Classification of main energy resources and their trends in the USA energy production is provided. Renewable energy resources are analyzed and their contribution to the USA energy balance is described.
    Źródło:
    Research in Logistics & Production; 2016, 6, 5; 419-428
    2083-4942
    2083-4950
    Pojawia się w:
    Research in Logistics & Production
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Certificate Programs in Computer Networks, Security, and Cloud Computing in the USA - A Review
    Autorzy:
    Gapinski, Andrzej J.
    Powiązania:
    https://bibliotekanauki.pl/articles/425879.pdf
    Data publikacji:
    2017
    Wydawca:
    Szkoła Główna Handlowa w Warszawie
    Opis:
    The computer networks and security topics have been covered traditionally by computer science and information sciences and technology academic programs at numerous universities and colleges around the country. These themes have been the subject of specific courses within the respective undergraduate academic majors, graduate programs and certification programs. With the rapid advancement in computer technologies and their applications, the business world created the demand for specialists with appropriate knowledge and skills set associated with computer networks, cybersecurity, and recently added cloud computing services. To satisfy the job requirements often in niche areas, many certification programs were created by industry and academia, which complemented the 2-year or 4-year academic programs. The certification programs either augment skills set developed by academic degree programs or provide skilled workforce upon completion of relatively short in duration education or training programs through certification processes without completing lengthy academic degree curricula.
    Źródło:
    e-mentor. Czasopismo naukowe Szkoły Głównej Handlowej w Warszawie; 2017, 4 (71); 64-78
    1731-6758
    1731-7428
    Pojawia się w:
    e-mentor. Czasopismo naukowe Szkoły Głównej Handlowej w Warszawie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A digital electronics course based on a hybrid delivery method using Digilent BASYS FPGA boards
    Autorzy:
    Gapinski, Andrzej J.
    Powiązania:
    https://bibliotekanauki.pl/articles/426096.pdf
    Data publikacji:
    2020
    Wydawca:
    Szkoła Główna Handlowa w Warszawie
    Tematy:
    digital circuit design
    hybrid or blended delivery method
    programmable memory devices
    computer engineering course
    VHDL
    Opis:
    The article discusses the teaching methodology for a digital electronics course utilizing BASYS Field Programmable Gate Array (FPGA) boards (Digilent, Inc.), with a hybrid or blended classroom delivery method. The article outlines a methodology that combines the teaching of current digital circuit design technology with the use of a pedagogical approach to online delivery for a proportion of the course lectures. The FPGA boards by Digilent offer a modern PLD technology platform where beginners and more advanced practitioners alike may design and implement digital circuits with various operational capabilities. This means that the boards offer state-of-the art technology for computer engineering instructors to effectively introduce modern programmable memory technologies in the classroom. However, in light of the increased necessity for flexibility in college course delivery methods, the article also shows a successful method of material delivery that incorporates an online component. This aspect addresses the current expectations for greater course delivery flexibility and convenience due to the increasing number of adult students who need to work to support themselves and/or their families. Thus, the article offers an effective pedagogical approach to teaching current digital circuit analysis and design using a modern material delivery method.
    Źródło:
    e-mentor. Czasopismo naukowe Szkoły Głównej Handlowej w Warszawie; 2020, 84, 2; 22-31
    1731-6758
    1731-7428
    Pojawia się w:
    e-mentor. Czasopismo naukowe Szkoły Głównej Handlowej w Warszawie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Cloud computing services - status and trends
    Autorzy:
    Gapinski, Andrzej J.
    Powiązania:
    https://bibliotekanauki.pl/articles/426178.pdf
    Data publikacji:
    2016
    Wydawca:
    Szkoła Główna Handlowa w Warszawie
    Tematy:
    cloud computing services
    computer networks technologies
    Opis:
    Cloud computing services gained in popularity in recent years. Cloud computing, the relatively new information technology discipline, has its roots in older technologies. The paper provides classification and a review of essential services being offered currently by a variety of vendors. Elastic-R environment for cloud enabled scientific calculation is described. Contents of certification under development in computer networks technologies, security, and cloud computing with laboratory exercises are provided.
    Źródło:
    e-mentor. Czasopismo naukowe Szkoły Głównej Handlowej w Warszawie; 2016, 2 (64); 70-78
    1731-6758
    1731-7428
    Pojawia się w:
    e-mentor. Czasopismo naukowe Szkoły Głównej Handlowej w Warszawie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On factors affecting trust in project management
    Autorzy:
    Gapinski, Andrzej J.
    Powiązania:
    https://bibliotekanauki.pl/articles/409574.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    trust
    project management
    affecting factors
    Opis:
    The article investigates the factors affecting a trust in project management. The factors influencing trust in program and project management classified as either a cognitive-based or an affect-based are defined and analyzed in both manufacturing and service sectors based on survey data collected from project managers of various industries and service sectors firms in USA and abroad. The article alalyzes the trust affecting factors in both vertical such as supervisor-subordinate and horisontal such as peer-to-peer type of dependency among project management processes participants. The article follows two prevuiously published articles by author on trust in project management.
    Źródło:
    Research in Logistics & Production; 2019, 9, 3; 199-209
    2083-4942
    2083-4950
    Pojawia się w:
    Research in Logistics & Production
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Teaching in a time of pandemic: The case of the EMET Program at Pennsylvania State University - Fayette
    Autorzy:
    Gapinski, Andrzej J.
    Powiązania:
    https://bibliotekanauki.pl/articles/35729360.pdf
    Data publikacji:
    2024
    Wydawca:
    Szkoła Główna Handlowa w Warszawie
    Tematy:
    educational system
    teaching modes
    online learning
    pandemic
    engineering program
    Opis:
    The author shares his experiences of university teaching during the time of restrictions imposed on teaching and learning modes due to a pandemic. The relative scarcity of literature analyzing the response in the fields of science and engineering to the pandemic served as motivation. After providing general background information about the pandemic’s impact on educational systems worldwide, the article provides qualitative research with a narrative model for a case study of an engineering program at an American university. The analyzed case concerns the teaching and learning methodologies implemented in an electro-mechanical engineering technology bachelor’s degree program at Pennsylvania State University – the Fayette campus in the academic years 2020-22. Pennsylvania State University’s chosen teaching modes in the time of the pandemic to be used by instructors provide an example of adaptability of a higher education institution to the changing teaching and learning circumstances. The pedagogical approach to preparing, delivering, and assessment of learning effectiveness in engineering courses with a laboratory component is described. The article also shows how to use the learning management system, Canvas, with its analytical utility tool, to improve effectiveness and responsiveness of the teaching and learning process. The shortcomings and unexpected benefits of learning online pedagogy are shared and discussed. To assess the students’ perception and the study mode and their preferences in this regard, an anonymous, closed-ended, nominal-polytomous questionnaire was conducted, and its findings are analyzed. Further, to compare the students’ preferences as regards study modes depending on the academic discipline, engineering students were contrasted with students studying business as their major. The surveys also provide answers to trends in the longer term in students’ expectations for delivery of programs by higher education institutions.
    Źródło:
    e-mentor. Czasopismo naukowe Szkoły Głównej Handlowej w Warszawie; 2024, 104, 2; 64-73
    1731-6758
    1731-7428
    Pojawia się w:
    e-mentor. Czasopismo naukowe Szkoły Głównej Handlowej w Warszawie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stimuli-Responsive PNIPAM Based Copolymers: Modeling and Light Scattering Investigations
    Autorzy:
    Śliwa, T.
    Jarzębski, M.
    Gapiński, J.
    Grzeszkowiak, M.
    Kleshchanok, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/1198668.pdf
    Data publikacji:
    2014-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    82.35.Jk
    Opis:
    Temperature dependent behavior of poly(N-isopropylacrylamide) (PNIPAM) copolymers was investigated in three buffer-stabilized environments. The tests were performed in thermostabilized goniometer by dynamic and static light scattering. From the dynamic light scattering hydrodynamic radius was obtained. Based on the static light scattering data, calculations of the particle radius from the form factor model were done. Depending of the kind of copolymer, the different material response to temperature was observed. Also the characterization of dry particles was done by scanning electron microscope. These scanning electron microscopy micrograms showed the possibility of particles to aggregation.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 5; 1236-1239
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structure and Dynamics of Colloidal Suspensions Studied by Means of XPCS
    Autorzy:
    Patkowski, A.
    Gapinski, J.
    Fluerasu, A.
    Holmqvist, P.
    Meier, G.
    Lettinga, M.
    Nägele, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/1812242.pdf
    Data publikacji:
    2008-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    87.15.Vv
    83.10.Mj
    82.70.Dd
    Opis:
    Structure and dynamics of suspensions of charged colloidal spheres in water were studied by means of small-angle X-ray scattering and X-ray photon correlation spectroscopy using synchrotron radiation. Experimentally obtained dependences on the scattering vector q of the structure factor S(q), short-time collective diffusion coefficient D(q) and hydrodynamic function H(q) were in good agreement with theoretical predictions. No effect of screening of the hydrodynamic interactions, suggested in the literature, was found. The conditions are discussed at which the maximum of the hydrodynamic function peak value H(q_m) can be obtained experimentally.
    Źródło:
    Acta Physica Polonica A; 2008, 114, 2; 339-350
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mikrokontrolerowe konwertery "częstotliwość – kod" o zwiększonej dokładności
    Microcontroller based "frequency to code" converters with increased accuracy
    Autorzy:
    Jasik, J. R.
    Gapiński, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/156366.pdf
    Data publikacji:
    2013
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    pomiar częstotliwości
    metoda synchroniczna
    metoda wagowa
    mikroprocesorowy pomiar częstotliwości
    frequency measurement
    synchronous method
    weight method
    microcontroller based frequency measurement method
    Opis:
    W artykule przedstawiono nowoczesne metody pomiaru częstotliwości zapewniające zminimalizowanie błędu kwantowania dzięki użyciu zaawansowanych metod pomiarowych, predestynowanych do realizacji komputerowych. Układ zrealizowano przy użyciu 32-bitowego mikrokontrolera STM32F103CBT6 oraz komputera osobistego. Zaprezentowano algorytmy sterujące napisane dla mikrokontrolera w języku C oraz aplikację sterującą w środowisku LabVIEW. Przedstawione wyniki eksperymentu zobrazowały przewagę omówionych nowoczesnych metod w porównaniu do metod klasycznych.
    The paper presents modern frequency measurement methods ensuring minimization of the quantization error. The minimization is achieved by using advanced measurement methods predestined for computer realization. The synchronous (Fig. 2) and weight algorithm (Fig. 4) methods are described. The synchronous method decreases the quantization error which is the results of no synchronization between the start and stop gating time Tp and the first and last impulse formed from the measured frequency signal. For low frequency measurements there was used the weight algorithm. This method guarantees minimization of the quantization error thanks to ascribing the weight coefficients to partial results of the measured Txi periods that are located inside the multiple n periods of the measured signal. The paper presents practical realization of the measurement with the constructed measuring system. The system was made by using a 32-bit microcontroller STM32F103CBT6 with counters, DMA and interrupt modules. In the paper there are described the control algorithms in C language for the microcontroller program (Fig. 7) and virtual control panel created in LabVIEW (Fig. 8). The results obtained show the advantages of the discussed methods in comparison to the classical methods (Figs. 10, 11 ).
    Źródło:
    Pomiary Automatyka Kontrola; 2013, R. 59, nr 7, 7; 624-627
    0032-4140
    Pojawia się w:
    Pomiary Automatyka Kontrola
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Oyster mycelium on the liquid medium
    Grzybnia boczniaka na pożywkach płynnych
    Autorzy:
    Gapinski, M.
    Wozniak, W.
    Ziombra, M.
    Murawska, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/67466.pdf
    Data publikacji:
    2007
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    oyster mushroom
    mycelium
    liquid medium
    Pleurotus
    edible mushroom
    Opis:
    The research presents the results of oyster mycelium growth on the liquid medium. The mycelim growth: Pleurotus citrinopileatus Singer, P. djamor (Rumph.: Fr.)Boedjin, P. erynii (DC.)Gillet and P. precoce (Fr). Quél. was tested. The quality and quantity of mycelium was assumed.
    Materiałem wyjściowym do namnażania grzybni boczniaka w kulturach płynnych była grzybnia boczniaka na pozywce agarowej z banku odmian Katedry Warzywnictwa Akademii Rolniczej im. A. Cieszkowskiego w Poznaniu. Analizowano na pożywkach Hansena i ziemniaczanej wzrost grzybni następujących gatunków: boczniak żółty Pleurotus citrinopileatus,boczniak różowy Pleurotus djamor, boczniak królewski Pleurotus eryniii Pleurotus precoce.
    Źródło:
    Acta Mycologica; 2007, 42, 1
    0001-625X
    2353-074X
    Pojawia się w:
    Acta Mycologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Yield as an indicator of progress in production of mushrooms Agaricus bisporus (Lange,Sing)
    Plon jako wskaźnik postępu w produkcji pieczarek Agaricus bisporus (Lange,Sing)
    Autorzy:
    Gapiński, M.
    Woźniak, W.
    Murawska, J.
    Ziombra, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/11542327.pdf
    Data publikacji:
    2012
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Opis:
    The total yield of mushrooms depends on the amount and quality of the applied substrate. The results given in this study concern the proportions of quality classes of mushrooms in the total yield. This study presents data on yield classes of mushrooms over the four years of the study in terms of months of the year. All the evaluated periods of culture, irrespective of the year and months, varied in terms of the volume and quality of produced explanation yield. The highest increase in yield in the successive cultures was recorded for mushrooms class Exthra. These results show that the direction of development for mushroom production was correct. The advantage of yield-forming property of phase III compost over the yield-forming efficiency of phase II. Its rate of development was not very intensive.
    Wysokość ogólna plonu pieczarek zależy od ilości i jakości podłoża. Przedstawione wyniki dotyczą udziału poszczególnych klas jakości pieczarek w plonie ogólnym. Praca prezentuje wyniki masy klas plonu pieczarek w okresie czterech lat badań w zależności od miesięcy. Wszystkie oceniane okresy uprawy, niezależnie od lat badań i miesięcy w roku, były zróżnicowane pod względem wielkości oraz jakości uzyskanego plonu. Największy wzrost plonu w kolejnych dalszych uprawach wykazywały pieczarki klasy Ex. Wyniki dowodzą, że kierunek rozwoju produkcji pieczarek był coraz bardziej efektywny, ale jego stopień postępu mało intensywny, ponieważ w okresie badań plon klasy Ex wzrósł o 132%, ale nadal jest stosunkowo duży udział pieczarek klas gorszej jakości.
    Źródło:
    Acta Scientiarum Polonorum. Hortorum Cultus; 2012, 11, 3; 15-26
    1644-0692
    Pojawia się w:
    Acta Scientiarum Polonorum. Hortorum Cultus
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ocena owocow ogorka z uprawy na roznych keramzytach
    Autorzy:
    Wozniak, W
    Gapinski, M.
    Kossowska, I.
    Pirog, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/805013.pdf
    Data publikacji:
    1999
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
    Tematy:
    uprawa roslin pod oslonami
    ogorki
    uprawa szklarniowa
    keramzyt
    wlasciwosci organoleptyczne
    wlasciwosci fizykochemiczne
    cechy morfologiczne
    podloza uprawowe
    warzywa
    Opis:
    Celem badań było określenie cech morfologicznych, fizykochemicznych i organoleptycznych owoców ogórka z upraw w zależności od pochodzenia keramzytu i jego granulacji. Ogórki uprawiane były w szklarni nieogrzewanej, w cyklu wiosennym na podłożach o różnej granulacji keramzytu, z dwóch wytwórni, a mianowicie: polskiej firmy Embra Gniew Sp. z o. o. o granulacji 8 - 16 mm i 4 - 8 mm, oznakowane odpowiednio (G 8 - 16 mm) i (G 4 - 8 mm) oraz duńskiej firmy Fibo Exclary Polska o takiej samej granulacji 4 - 8 mm i 8 - 16 mm, oznakowane (F 4 - 8 mm) i (F 8 - 16 mm). Na podstawie uzyskanych wyników stwierdzono, że według większości badanych wyróżników ogórki charakteryzowały się lepszą jakością z uprawy na podłożach o granulacji 4 - 8 mm niż 8 - 16 mm i to niezależnie od pochodzenia keramzytu. Ogórki z uprawy na keramzycie firmy duńskiej Fibo były gorsze w smaku w porównaniu do ogórków z uprawy na polskim keramzycie firmy Gniew.
    The purpose of experiments was to determine the morphological, physicochemical and organoleptic features of cucumber fruits depending on the origin of keramsit and its granulation. The results showed that according to the majority of tested discriminants the cucumbers grown on the substrate of 4 - 8 mm granulation showed better quality than on that of 8 - 16 mm granulation irrespective of the keramsit origin. The taste of cucumbers grown on Danish Fibo co. keramist was worse comparing to the cucumbers grown on Polish keramsit from Gniew Co.
    Źródło:
    Zeszyty Problemowe Postępów Nauk Rolniczych; 1999, 466; 529-535
    0084-5477
    Pojawia się w:
    Zeszyty Problemowe Postępów Nauk Rolniczych
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dependence of the yield of mushrooms [Agaricus bisporus (Lange, Sing)] on the applied substrate
    Zależności od podłoża plonu pieczarki Agaricis bisporus (Lange, Sing)
    Autorzy:
    Gapiński, M.
    Woźniak, W.
    Murawska, J.
    Ziombra, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/11541913.pdf
    Data publikacji:
    2010
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Tematy:
    mushroom
    Agaricus bisporus
    substrate type
    yield
    cultivation method
    Opis:
    Substrate yield-forming properties and their impact on common mushroom yields were evaluated in the course of the performed experiments. All substrates for mushroom cultivation were characterised by considerable variability of yield-forming characteristics. The following yield-forming factors in mushroom cultivation were analysed: weight of substrate in kg·m-2 of cultivation area, the method of substrate preparation, substrate moisture content at filling of the cultivation chamber, amount of substrate dry matter in kg·m-2 of cultivation area, ammonia concentration in phase II substrate after pasteurisation. The highest mushroom yields were obtained from phase III substrate. An increase of the substrate dry matter per square metre of cultivation area by 1% led to a significant increase in the yield of mushrooms.
    Polskie pieczarkarstwo w ostatnim dziesięcioleciu ubiegłego wieku przeszło zasadnicze zmiany. Rozwinęła się daleko posunięta specjalizacja w etapach produkcji. Do istotnych zmian należy zaliczyć proces produkcji podłoża. Wprowadzenie pasteryzacji w tak zwanej masie umożliwiło zaopatrywanie producentów w dużą ilość podłoża z wsianą grzybnią lub podłoża całkowicie opanowanego przez grzybnię. Przeprowadzono ocenę cech plonotwórczych podłoży i ich wpływ na plon pieczarki. Wszystkie podłoża do uprawy pieczarek charakteryzowały się dużym zróżnicowaniem cech plonotwórczych. Jako czynniki plonotwórcze w uprawie pieczarek analizowano: masę podłoża w kg·m-2 powierzchni uprawy, sposób przygotowania podłoża, wilgotność podłoża podczas napełniania hali, ilość suchej masy podłoża w kg·m-2 powierzchni uprawowej, zawartość amoniaku po pasteryzacji w podłożu fazy II. Najwyższy plon pieczarek uzyskano na podłożu fazy III. Wzrost ilości suchej masy podłoża na metrze powierzchni uprawy o jeden procent powodował istotne zwiększenie plonu pieczarek.
    Źródło:
    Acta Scientiarum Polonorum. Hortorum Cultus; 2010, 09, 4; 111-120
    1644-0692
    Pojawia się w:
    Acta Scientiarum Polonorum. Hortorum Cultus
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modelling, manufacturability and compression properties of the CpTi grade 2 cellular lattice with radial gradient TPMS architecture
    Autorzy:
    Maszybrocka, J.
    Gapiński, B.
    Dworak, M.
    Skrabalak, G.
    Stwora, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/201748.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    selective laser sintering
    additive manufacturing
    cellular lattice
    triply periodic minimal surfaces
    mechanical properties
    Opis:
    In the present study, a titanium cellular lattice structure with a mathematical designed porosity gradient was successfully fabricated using the selective laser melting method. The samples with smooth gradient transition of porosity of between 60% and 80% were received for different elementary cell geometries. Elementary cells belong to the triply periodic minimal surfaces family (G, D, I2Y, IWP). Each sample was subjected to a comprehensive analysis including: dimensional metrology and assessment of material defects (X-ray micro-tomography), surface morphology tests (scanning electron microscopy) and mechanical properties (universal testing machine). It has been shown that a cellular lattice with high dimensional accuracy (+ 0.16/– 0.08 mm) and full dense struts can be obtained. According to the assumption, the gradient increases the strength of the cellular lattice samples. The highest increase in plateau stress between the samples with and without gradient was found for the I2Y series (about 185%). Furthermore, it was found that the stress-strain response of the samples depends not only on total porosity, but also on the 3D geometry of the cellular lattice. The stress-strain curves for G, IWP and I2Y samples are smooth and exhibit three characteristic regions: linear elasticity, plateau region and densification region. The size of regions depends on the geometric features of the cellular lattice. For series D, in the plateau region, the fluctuations in stress value are clearly visible. The smoothest stress-strain curve can be noted for the G series, which combined with good mechanical properties (the plateau stress and energy absorbed, at respectively 25.5 and 43.2 MPa, and 46.3J and 59.5J for Gyr_80 and Gyr_6080, which corresponds to a strain of almost 65% and 50%) positively affects the applicability of cellular structures with such geometry.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2019, 67, 4; 719-727
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Luminescence of Zn$\text{}_{x}$Mg$\text{}_{1-x}$Se Layers Obtained by Thermal Diffusion of Mg into ZnSe and Zn$\text{}_{x}$Mg$\text{}_{1-x}$Se Epilayers Grown by Molecular Beam Epitaxy
    Autorzy:
    Bała, W.
    Firszt, F.
    Głowacki, G.
    Gapiński, A.
    Dzik, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1931931.pdf
    Data publikacji:
    1995-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.55.Et
    78.20.Ci
    78.66.Hf
    Opis:
    This work deals with the study of photoluminescence properties of Zn$\text{}_{x}$Mg$\text{}_{1-x}$Se epilayers grown by molecular beam epitaxy on (001) GaAs and (111) ZnTe substrates and Zn$\text{}_{x}$Mg$\text{}_{1-x}$Se layers obtained by thermal diffusion of Mg into ZnSe single crystals. Luminescence spectra of Zn$\text{}_{x}$Mg$\text{}_{1-x}$Se layers are dominated by blue and violet emission bands with maxima positioned in the range of photon energies: 3.05-3.28 eV, 2.88-3.04 eV, 2.81 eV and 2.705 eV, depending on preparation conditions. In some samples the blue luminescence is observed up to room temperature.
    Źródło:
    Acta Physica Polonica A; 1995, 87, 1; 161-164
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Morphology and surface topography of Ti6Al4V lattice structure fabricated by selective laser sintering
    Autorzy:
    Maszybrocka, J.
    Stwora, A.
    Gapiński, B.
    Skrabalak, G.
    Karolus, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/202149.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    metal porous implant
    selective laser sintering
    surface roughness
    X-ray microtomography
    selektywne spiekanie laserowe
    chropowatość powierzchni
    Mikrotomografia
    Opis:
    Construction of metallic implants with a porous structure that mimics the biomechanical properties of bone is one of the challenges of orthopedic regenerative medicine. The selective laser sintering technique (SLS) allows the production of complex geometries based on three-dimensional model, which offers the prospect of preparing porous metal implants, in which stiffness and porosity can be precisely adjusted to the individual needs of the patient. This requires an interdisciplinary approach to design, manufacturing and testing of porous structures manufactured by selective sintering. An important link in this process is the ability to assess the surface topography of the struts of porous structure. The paper presents a qualitative assessment of the surface morphology based on SEM studies and methodology that allows for quantitative assessment of stereometric structure based on micro-tomographic measurements.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2017, 65, 1; 85-92
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Piston assembly in the most powerful 2.0l diesel engine – case study of the current tribological system and innovative concepts for the future
    Autorzy:
    Kałużny, J.
    Merkisz, J.
    Stepanenko, A.
    Wróblewski, E.
    Gapiński, B.
    Piasecki, A.
    Gallas, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/133301.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    piston engine
    powertrains development
    tribological system
    silnik tłokowy
    rozwój układów napędowych
    system tribologiczny
    Opis:
    This article is a contribution to the ongoing debate on the scenario of the vehicle powertrains development. The directions of the internal combustion engines development in search of the possibility of effective economic and ecological indicators improvement have been indicated. It has been pointed out that this goal can be achieved through the use of nanotechnology in order to exceed the downsizing barriers resulting from the permissible mechanical loads for conventional materials. The article presents the study of the construction and materials used in the piston assembly of the most advanced four-cylinder, compression-ignition diesel engine currently in manufacture. Original concepts of nanotechnology have been proposed to reduce friction losses in major friction components of future engines with extremely high loads. The main idea is to verify the hypothesis that the sub-micron surface texture of the friction components obtained in the process of applying anti-wear outer layers can lead to an effective reduction of friction losses under real engine operating conditions. Computer simulations of the effects of introducing the surface texture in the upper sealing ring on friction loss confirm this hypothesis by showing friction value being reduced by 3-4% relative to the standard ring profile. In the summary, further advanced technologies designed to effectively utilize the unique properties of carbon nanotubes have been described.
    Źródło:
    Combustion Engines; 2017, 56, 4; 127-133
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of temperature gradient on surface texture measurements with the use of profilometry
    Autorzy:
    Miller, T.
    Adamczak, S.
    Świderski, J.
    Wieczorowski, M.
    Łętocha, A.
    Gapiński, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/201056.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    profilometry
    surface topography
    temperature influence on measurements
    credibility
    profilometria
    topografia powierzchni
    wpływ temperatury na pomiary
    wiarygodność
    Opis:
    The paper presents an analysis of influence of ambient temperature changes on the values of parameters in topography measurements with the use of different profilometry techniques. In order to check this, a series of measurements was performed. Two multiprofilometry instruments were used - a contact profilometer, further equipped with an interferometric transducer, and an optical one with a confocal probe. Measurements were performed on first-class flat interferometric glass and on an A-type roughness standard - under different conditions, with simultaneous registration of differences in ambient temperature values. These values were either intentionally changed or the temperature variations were the result of air conditioning control. The performed research showed that - despite the asperities on the surface being really small - there is a relationship between changes of temperature and the results obtained from the measured surface, which in some cases can be seriously distorted.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2017, 65, 1; 53-62
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Friction reducing performance of carbon nanotubes covered pistons in internal combustion engines – engine test results
    Autorzy:
    Kałużny, J.
    Merkisz, J.
    Kempa, K.
    Gapiński, B.
    Wróblewski, E.
    Stepanenko, A.
    Al-Karawi, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/133001.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    combustion engines
    piston
    carbon nanotubes
    friction
    silniki spalinowe
    tłok
    nanorurki węglowe
    tarcie
    Opis:
    This article discusses the posibility of reducing friction losses in internal combustion engines by using carbon nanotubes, pointing out the large potential of this application. Experimental pistons were made of standard aluminum alloy and coated with a layer of nanotube deposits by spraying them with an aqueous solution containing the binder. The proposed technology of applying layers of nanotubes can be adopted in industrial-scale production. Engine tests were carried out showing a significant reduction of the engine motoring torque, up to 16% for the experimental pistons, thus confirming the favorable tribological properties of nanotubes observed in tribological research and reported by many authors. Supplementary tests were carried out: SEM, EDS, coordinate measuring technique, and x-ray tomography. An alternative technology for hierarchical nanotube multilayer coatings electro-deposition was proposed.
    Źródło:
    Combustion Engines; 2018, 57, 1; 14-24
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Raman Analysis of Zn$\text{}_{1-x}$Mg$\text{}_{x}$Se Layers Grown on GaAs and ZnTe Substrates
    Autorzy:
    Renucci, M. A.
    Frandon, J.
    Głowacki, G.
    Gapiński, A.
    Rozpłoch, F.
    Bała, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/1952686.pdf
    Data publikacji:
    1996-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.30.-j
    Opis:
    A study of the Raman scattering in Zn$\text{}_{1-x}$Mg$\text{}_{x}$Se (0 ≤ x ≤ 0.4) epilayers grown by molecular beam epitaxy on (100) GaAs and (111)$\text{}_{Zn}$ ZnTe substrates has been performed. Two kinds of longitudinal optical phonon modes (LO$\text{}_{Zn-Se}$ and LO$\text{}_{Mg-Se}$) were observed under excitation of the Ar$\text{}^{+}$ and Kr$\text{}^{+}$ laser lines at room temperature, whose frequencies and intensities depend characteristically on the Mg content.
    Źródło:
    Acta Physica Polonica A; 1996, 90, 5; 1065-1069
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Accuracy of the element geometry mapping using non-invasive computer tomography method
    Autorzy:
    Grzelka, M.
    Marciniak, L.
    Gapinski, B.
    Budzik, G.
    Trafarski, A.
    Augustyn-Pieniazek, J.
    Gaca, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/384351.pdf
    Data publikacji:
    2012
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
    Tematy:
    computer tomography
    optical coordinate measuring technique
    reverse engineering
    accuracy of workpiece mapping
    Opis:
    Non-invasive method of the measurement and identification of shape and geometrical characteristics of measured detail based on the computer tomograph is widely applied in medicine with high efficiency. The paper is aimed at presenting the metrological analysis of the accuracy of shape reproduction. The examined shape was described due to the tomography and compared to the results of coordinate measurement. The comparative accuracy analysis of the tomography was performed for the typical details, as well as for the masters made with high accuracy. Using the results of the analysis, the respective models of measured details were created and used as a nominal in the further investigations. The results of the measurement with tomography were compared with the results achieved from the measurement by means of typical coordinate measuring machines and by means of 3D measurement optical scanner. Analysis of the gained values of the form deviations and important geometrical characteristics enabled to perform complex analysis of the shape reproduction of the examined detail with the method of computer tomography. The main purpose of the performed researches was the determination of the reproduction accuracy of surface measured with non-invasive computer tomography method. The investigations and analysis have been performed with the following equipment: computer tomograph, 3D printer and coordinate optical scanner supported with specialized software for advanced CAD data analysis.
    Źródło:
    Journal of Automation Mobile Robotics and Intelligent Systems; 2012, 6, 3; 23-26
    1897-8649
    2080-2145
    Pojawia się w:
    Journal of Automation Mobile Robotics and Intelligent Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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