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Wyszukujesz frazę "Stępień, T." wg kryterium: Autor


Tytuł:
Modelowanie wielkości użytkowania rębnego drzewostanów w zależności od przyjętych metod prognozowania rozwoju lasu
Modelling of the size of allowable cutting based on adopted methods of forest development forecast
Autorzy:
Szyc, K.
Borecki, T.
Stępień, E.
Kędziora, W.
Konieczny, A.
Orzechowski, M.
Wójcik, R.
Powiązania:
https://bibliotekanauki.pl/articles/979061.pdf
Data publikacji:
2020
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
forestry use
forest development
modelling of usage regulation
Opis:
Many attempts have been made to develop a strategy for regulating forest use consistent with the multifunctional forest model. In this paper we present two proprietary methodologies of regulation of the allowable cutting size in a multifunctional forest in the 60−year time perspective. We assumed that all restrictions of nature protection and non−productive functions of the forest would still be in force. We based the first method on age class tables (TKW), which is faster but less exact in terms of spatial order of felling. The tree stand method (D−STAN) is based on stands spatial order and the cutting direction basis. In both cases, we based the temporal felling order on species rotation age. Comparing the results, we noticed that they present similar trends in the age structure of tree stands in younger age classes. The main discrepancies of the forecast concerns the share of forest stands in a complex structure: the TKW method gave approximately 12,4%, while the D−STAN one produced 5,1%. The latter approach shows that much smaller areas of stands are used for reconstruction. That marker is influenced by the spatial order of cutting used in the D−STAN model. In conclusion, we suggest to return to the big−area clear−cutting system on fresh coniferous habitats. Medium−area clear−cuttings should be brought back on the least fertile fresh mixed coniferous forests and possibly even fresh mixed deciduous forests.
Źródło:
Sylwan; 2020, 164, 04; 280-291
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pharmacokinetics and pharmacodynamics of a single dose of sustained-release azithromycin formulation in pigeons
Autorzy:
Zań, R.
Burmańczuk, A.
Stępień-Pyśniak, D.
Gajda, A.
Gbylik-Sikorska, M.
Posyniak, A.
Kowalski, C.
Grabowski, T.
Powiązania:
https://bibliotekanauki.pl/articles/2087364.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
azithromycin
pigeon
pharmacokinetics
pharmacodynamics
dose
Źródło:
Polish Journal of Veterinary Sciences; 2020, 23, 1; 43-50
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Regionalne zróżnicowanie potrzeb i pilności przebudowy drzewostanów
Regional diversity of the need and the urgency of stands conversion
Autorzy:
Stępień, E.
Kędziora, W.
Orzechowski, M.
Wójcik, R.
Borecki, T.
Powiązania:
https://bibliotekanauki.pl/articles/985680.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
drzewostany
przebudowa drzewostanow
potrzeby przebudowy
zroznicowanie regionalne
regionalne dyrekcje Lasow Panstwowych
stand classification
regional heterogeneity
conversion necessity
state forests
Opis:
Nowadays in forestry, we observe an increase in threats that rise the uncertainty and risk of the forest management. This is caused, inter alia, by increasing intensity of forest and environmental damage as well as by the conflict of expectations for the use of forest resources. As a result, there is a problem of achieving the goals of sustainable development and adaptation of the forest ecosystems to new challenges. The aim of the presented study was to assess the regional variety of the need and the urgency of stands conversion. The feature was determined for all stands of the State Forests older than 20 years. Three assessment criteria were selected: (A) silvicultural target (compatibility of the species composition with the planned one), (B) stands stability (resultant from 5 auxiliary sub−indices), and (C) stock level (including 2 auxiliary sub−indices). The majority of stands has consistent species composition (over 60% in total), however only a small fraction of stands was found with a species composition incompatible with the planned one (average 6.34%). Stands with medium stability accounted for about 70%, while those with poor growing stock status make up about 70% of stands under analysis. The regional diversification of the needs for stands reconstruction seems to be strongly correlated with the incompatibility of stand’s species composition with habitat conditions. The largest fraction of stands requiring conversion was observed in Wrocław, Kraków and Katowice regional directorates of the State Forests. This situation may change in the future due to dynamic changes resulting from modifications of the climate and the deterioration of health condition of dominant Scots pine stands in central and north parts of Poland. Private forests were not taken into consideration in this research. It may impact the overall picture in regions of the high share of private forest ownership.
Źródło:
Sylwan; 2019, 163, 04; 267-278
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investment dilemmas in the implementation of gasification technology in Poland
Dylematy inwestycyjne wdrażania technologii zgazowania w Polsce
Autorzy:
Ściążko, M.
Chmielniak, T.
Kwaśniewski, K.
Stępień, L.
Powiązania:
https://bibliotekanauki.pl/articles/283336.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN
Tematy:
gasification
gasification technologies
coal
zgazowanie
technologia zgazowania
węgiel
Opis:
Gasification technology is often seen as a synonym for the clean and efficient processing of solid fuels into combustible gas containing mainly carbon monoxide and hydrogen, the two basic components of synthesis gas. First and foremost, the facts that gas may be cleaned and that a mixture with any composition may be prepared in a relatively easy and inexpensive manner influence the possibility of using gas produced in the energy and chemical industries. In the energy industry, gas may be used directly to generate heat and electricity in the systems of a steam power plant or in combined cycle systems. It is also possible to effectively separate CO2 from the system. However, in chemistry, synthesis gas may be used to produce hydrogen, methanol, synthetic gasolines, and other chemical products. The raw material for gasification is full-quality pulverized coal, but a possibility of processing low-quality sludges, combustible fractions separated from municipal waste as well as industrial waste also exists. Despite such a wide application of technology and undoubted advantages thereof, making investment decisions is still subject to high uncertainty. The paper presents the main technological applications of gasification and analyzes the economic effectiveness thereof. In this context, significant challanges for the industrial implementation of this technology are discussed.
Technologia zgazowania postrzegana jest często jako synonim czystego i efektywnego przetwórstwa paliw stałych do gazu palnego zawierającego głównie tlenek węgla i wodór – dwa podstawowe składniki gazu syntezowego. Możliwość stosunkowo łatwego i taniego oczyszczania gazu oraz komponowania jego składu pozwala na szerokie zastosowanie technologii w energetyce i przemyśle chemicznym. W energetyce gaz może być bezpośrednio użytkowany do wytwarzania ciepła i energii elektrycznej w układach siłowni parowej, względnie w układach gazowo-parowych. Dodatkową zaletą jest możliwość skutecznego i relatywnie taniego usuwania CO2 z układu. W chemii gaz syntezowy może służyć do wytwarzania wodoru, metanolu, benzyn syntetycznych i innych produktów chemicznych. Surowcem dla zgazowania może być zarówno miał węglowy, jak również paliwa niskojakościowe, w tym muły węglowe, palne frakcje wydzielane z odpadów komunalnych i odpadów przemysłowych. Mimo tak szerokich możliwości zastosowania technologii zgazowania oraz jej niewątpliwych zalet, podejmowanie decyzji inwestycyjnych obarczone jest ciągle dużą niepewnością. W artykule przedstawiono główne kierunki zastosowania technologii zgazowania i przeanalizowano ich efektywność ekonomiczną. W tym kontekście omówiono istotne uwarunkowania przemysłowego wdrożenia tej technologii.
Źródło:
Polityka Energetyczna; 2018, 21, 2; 105-123
1429-6675
Pojawia się w:
Polityka Energetyczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zastosowanie oceny technologii w przypadku nanotechnologii. Główne zagadnienia i podejścia teoretyczne
Application of technology assessment in the case of nanotechnology. Major issues and theoretical approaches
Autorzy:
Stępień, T.
Powiązania:
https://bibliotekanauki.pl/articles/322765.pdf
Data publikacji:
2018
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
ocena nanotechnologii
technonauka
technologie konwergentne
nanoetyka
ocena ryzyka
regulowanie ryzyka
nanotechnology assessment
technoscience
converging technologies
nanoethics
risk assessment
risk governance
Opis:
Nanotechnologie stanowią jeden z głównych przedmiotów analiz w ramach teorii technonauki i oceny technologii jak również w przypadku rozwoju tzw. technologii konwergentnych (nano-bio-info). Przedstawione dotychczas analizy nanotechnologii były skoncentrowane na: 1) dylematach naukowo11 teoretycznych, metodologicznych i systemowych związanych z procesem konstytuowania nanotechnologii jako nowego obszaru nauki i techniki; 2) modelach oceny ryzyka, kwestiach związanych z zasadą ostrożności oraz ocenach wizji rozwoju; 3) wymiarze etycznym nanotechnologii związanym z bezpiecznym i zrównoważonym zastosowaniem na masową skalę nano-produktów. Celem prezentowanych analiz jest syntetyzujące nakreślenie samego obszaru badań poświęconych rozwojowi technologicznemu, w szczególności nanotechnologii, w oparciu o kluczowe opracowania przedstawione w ostatniej dekadzie.
Nanotechnologies belong to the major objectives in the theory of technoscience and technology assessment or the development of converging technologies (nano-bio-info). Hereby the presented to date analyses are focused on: 1) theoretical, methodological and systematic dilemmas with regard to the process constituting nanotechnology as a new field of science and technology; 2) models of risk assessment and issues related with the precautionary principle and visions’ assessment; 3) ethical dimension of nanotechnology concerning the safe and sustainable mass dissemination of nano-based products. The presented analyses design synthetically the research field devoted to the technological development, especially nanotechnology, basing on the key body literature elaborated in the last decade.
Źródło:
Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska; 2018, 115; 289-301
1641-3466
Pojawia się w:
Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zimowanie biedronkowatych (Coleoptera: Coccinellidae) w Parkach Warszawskich
Overwintering of ladybird beetles (Coleoptera: Coccinellidae) in city parks in Warsaw
Autorzy:
Kalinowski, L.
Stepien, T.
Ceryngier, P.
Romanowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/32592.pdf
Data publikacji:
2018
Wydawca:
Mazowiecko-Świętokrzyskie Towarzystwo Ornitologiczne
Tematy:
zimowanie
biedronkowate
Coleoptera
Coccinellidae
gatunki zwierzat
Źródło:
Kulon; 2018, 23
1427-3098
Pojawia się w:
Kulon
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ewolucja roli i aktualnych zadań urządzania lasu
Evolution of the role and current tasks of forest management planning
Autorzy:
Borecki, T.
Stępień, E.
Powiązania:
https://bibliotekanauki.pl/articles/987032.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
gospodarka lesna
gospodarka zrownowazona
funkcje lasu
urzadzanie lasu
planowanie hodowlane
uzytkowanie lasu
uzytkowanie rebne
plany urzadzeniowe
sustainable forestry
evolution of forest planning tasks
adaptability of forest management
Opis:
The paper presents the history of approaches to forest management derived from the idea of forest sustainability, as well as its inspirational role in the formulation of the concept of sustainable development of forests. The promotion of this concept in forestry is the responsibility of forest management planning through the modification of forest management plans and adaptation of the principles of conducting forest management to changing realities. Changes in planning, both in terms of time and space, are necessary especially because of the reconsideration of the range and significance of forest functions. The development of the ‘normal forest’ model and management unit−level methods of forest planning was a key event in the history of forestry in Europe. The development of knowledge, as well as economic, technological and social changes were conducive to the emergence of new theories on the production intensification and to use the economic criteria for determining the rotation age. This also referred to the need to develop an appropriate forest structure to ensure the sustainable use of forest resources. As regards determination of the harvest level, the development of the stand−level method of forest management published by Judeich in 1871 is worth noting. Recent results of the research on forest habitat and productivity have revealed the problem of forest species composition and the importance of forest tending activities. Another group of research achievements cover the new systems of determining the allowable cut taking into account forest maturity and sustainability criteria. In the multiple−use forest model being implemented in Poland, forest utilization is to be treated as a realization of all forest functions expected by society. Accordingly, two functions of forest use can be distinguished − the temporary function aimed to satisfy the current demand for timber, and the strategic function to secure a relatively steady, long−term timber supply, as well as to improve the condition of forest resources. The idea of the modification of the principles of deter− mining the volume of harvest, meeting the set requirements, is a continuation of the above issues. The changes taking place in the conditions of the planning process in forestry over the last decades have caused its continuous extension in terms of range and interdisciplinary areas. The principles of forest use, renewal, tending and protection create a logical and chronological sequence of events showing the complexity of the problems that appear at the stage of planning and in the forest district practice. The current problem at the stage of forest planning is the effect of climate changes on forest ecosystems and possible measures to counteract them. When creating forest management plans, the adaptation activities related to forest management are gaining importance.
Źródło:
Sylwan; 2017, 161, 03; 179-188
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New approach to isometric transformations in oblique local coordinate systems of reference
Autorzy:
Stępień, G.
Zalas, E.
Ziębka, T.
Powiązania:
https://bibliotekanauki.pl/articles/145567.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
transformacja izometryczna
fotogrametria
układ odniesienia
oblique orthogonal system
isometric transformation
big rotation angles
Total Free Station
Opis:
The research article describes a method of isometric transformation and determining an exterior orientation of a measurement instrument. The method is based on a designation of a “virtual” translation of two relative oblique orthogonal systems to a common, known in the both systems, point. The relative angle orientation of the systems does not change as each of the systems is moved along its axis. The next step is the designation of the three rotation angles (e.g. Tait-Bryan or Euler angles), transformation of the system convoluted at the calculated angles and moving the system to the initial position where the primary coordinate system was. This way eliminates movements of the systems from the calculations and makes it possible to calculate angles of mutual rotation angles of two orthogonal systems primarily involved in the movement. The research article covers laboratory calculations for simulated data. The accuracy of the results is 10-6 m (10-3 regarding the accuracy of the input data). This confi rmed the correctness of the assumed calculation method. In the following step the method was verifi ed under fi eld conditions, where the accuracy of the method raised to 0.003 m. The proposed method enabled to make the measurements with the oblique and uncentered instrument, e.g. total station instrument set over an unknown point. This is the reason why the method was named by the authors as Total Free Station - TFS. The method may be also used for isometric transformations for photogrammetric purposes.
Źródło:
Geodesy and Cartography; 2017, 66, 2; 291-303
2080-6736
2300-2581
Pojawia się w:
Geodesy and Cartography
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Przewidywane oddziaływanie zmian klimatu na ekosystemy leśne oraz ich konsekwencje w urządzaniu lasu
Expected impact of climate change on forest ecosystems and its consequences in forest management planning
Autorzy:
Borecki, T.
Orzechowski, M.
Stępień, E.
Wójcik, R.
Powiązania:
https://bibliotekanauki.pl/articles/987172.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
ekosystemy lesne
urzadzanie lasu
czynniki klimatyczne
oddzialywanie na las
zmiany klimatyczne
prognozowanie zagrozen
wydzielanie sie drzew
plan ciec
climate change
forest ecosystems response
forest management planning
Opis:
The paper presents the assessment of possible impact of climate change on forest ecosystems in Poland and its consequences in the forest management planning. Scenarios of climate change in the twenty first century do not allow unambiguous determination of the rate and direction of these changes. However, it is believed that climate change could have negative economic con− sequences, which directly or indirectly will affect the deterioration of the environment. Analysis of the possible forms of the impact of climate change on forest ecosystems is particularly relevant in terms of growth conditions. The most noticeable consequences of the changes will concern the threat to the stability of forest stands resulting from the increase in the intensity of trees dieback caused by different factors. The phenomenon results, among others, from: the occurrence of new threats from biotic factors, including caused by secondary pests and the occurrence of alien species of flora and fauna, the severity of the impact of abiotic factors and the deterioration of health (especially of conifers). The increase in the intensity of the evolution of trees is directly related to the size of the cuts contingent and will lead to a blurring of the boundary between thinning and health−cutting. It is expected that the planned size of the cuts will be implemented mainly in the thinning and accidental cuts. This requires the modification of the perception of the rela− tionship of each category cuts. We propose the order and urgency in the planning of forest use. May be supposed that the role of the clearcutting system will be limited, with the exception of some forest complexes of predominantly productive functions, dominated by poor coniferous habitats. It is recommended to use the natural regeneration in the forest management. Lack of clear boundary between thinning and final cutting will require flexibility in the accounting for the total size of cuts. The consequences of climate change will probably occur in the long term perspective. It can therefore be assumed that reasonably forest management can help to reduce their negative effects. This requires pre−emptive decisions in forest management planning and verification for silviculture, production and protection targets, and their consistent implemen− tation.
Źródło:
Sylwan; 2017, 161, 07; 531-538
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Recognition of the 24-hour Noise Exposure of a Human
Autorzy:
Korbiel, T.
Stępień, B.
Batko, W.
Barański, R.
Mleczko, D.
Pawlik, P.
Blaut, J.
Powiązania:
https://bibliotekanauki.pl/articles/177799.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
noise hazard
24-hour noise exposure
Personal Indicator of Noise Hazard
acoustic monitoring
Opis:
The civilisation progress has caused noise to become one of essential pathogenic and life comfort decreasing factors. There are several legal regulations aimed at controlling the noise influence on humans. Assessment of the twenty-four-hour influence of noises in various environments constitutes an essential problem. The answer can be supplied by 24-hour monitoring of the sound pressure. This paper is an attempt to learn the real loading of humans by noises. A personal noise indicator was used in measurements. The human 24-hour activity was divided into cycles allowing to model noise hazards. The collected data, even though they did not signal exceeding of individual standards, in the 24-hour period indicated the essential noise influence. These results indicate the need of investigations to recognise the 24-hour noise load of a human, with taking into account various forms of their activity and the need of rest.
Źródło:
Archives of Acoustics; 2017, 42, 4; 601-607
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ modyfikacji chemicznej skrobi i stopnia hydrolizy na izotermy sorpcji pary wodnej hydrolizatów
Effect of chemical modification of starch and degree of hydrolisis on moisture sorption isotherms of hydrolysates
Autorzy:
Witczak, T.
Stepien, A.
Pycia, K.
Witczak, M.
Bednarz, A.
Grzesik, M.
Powiązania:
https://bibliotekanauki.pl/articles/827831.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Technologów Żywności
Tematy:
maltodekstryny
rownowaznik glukozowy
skrobia modyfikowana
skrobia natywna
skrobia acetylowana
fosforan diskrobiowy
para wodna
izotermy sorpcji
wlasciwosci sorpcyjne
reakcje enzymatyczne
hydroliza
maltodextrin
dextrose equivalent
modified starch
native starch
acetylated starch
distarch phosphate
steam
sorption isotherm
sorption property
enzymatic reaction
hydrolysis
Opis:
W pracy badano właściwości sorpcyjne maltodekstryn uzyskanych w reakcji enzymatycznej hydrolizy skrobi ziemniaczanej natywnej, acetylowanej oraz fosforanu diskrobiowego. Określono również wpływ uzyskanego stopniu scukrzenia (DE 6, 11, 16) na higroskopijność produktów. Izotermy sorpcji wyznaczono metodą statyczną w środowisku o aktywności wody 0 ÷ 0,903 w temp. 25 ºC. Do opisu izoterm zastosowano trzy modele matematyczne. Stwierdzono, że czteroparametrowy model Pelega umożliwił prezentację danych eksperymentalnych w pełnym badanym zakresie aktywności wody, podczas gdy wykorzystanie modeli BET i GAB wymagało ograniczenia danych. Wszystkie uzyskane krzywe charakteryzowały się sigmoidalnym kształtem, charakterystycznym dla izoterm typu II według klasyfikacji Brunauera i wsp. W zakresie adsorpcji mono- i wielowarstwowej badane hydrolizaty wykazywały zbliżone właściwości. Największe różnice w równowagowej zawartości wilgoci zaobserwowano przy aktywności wody większej od 0,7. Stwierdzono, że właściwości sorpcyjne badanych produktów uwarunkowane były głównie stopniem scukrzenia, natomiast modyfikacja chemiczna skrobi wpłynęła znacznie na ilość pochłoniętej wilgoci tylko w środowisku o wysokiej aktywności wody.
In the research study, the moisture sorption isotherms were determined for the hydrolysates obtained by the enzymatic hydrolysis of native potato starch, acetylated potato starch, and distarch phosphate. Furthermore, the effect was determined of the dextrose equivalent values obtained (DE 6, 11, 16) on the hygroscopicity of products. The sorption isotherms were determined using a static method in the environment, where water activity ranged from 0 to 0.903 at a temperature of 25 ºC. Three mathematical models were applied to describe sorption isotherms. It was found that the four-parameters Peleg’s model made it possible to present the experimental data within the full range of water activity while the use of the BET and GAB models required to limit those data. All the plotted curves were characterized by a sigmoidal shape, typical for isotherms of type II according to the classification by Brunauer et al. [4]. In mono- and multilayer adsorption regions, all the hydrolysates analysed exhibited similar properties. The highest differences in the equilibrium moisture content were reported at a water activity higher than 0.7. It was found that the sorption properties of the products investigated were determined mainly by the dextrose equivalent values, while the chemical modification of starch significantly impacted the content of adsorbed moisture only in the high water activity environment.
Źródło:
Żywność Nauka Technologia Jakość; 2017, 24, 1
1425-6959
Pojawia się w:
Żywność Nauka Technologia Jakość
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental and Thermodynamic Study of Selected in-Situ Composites from the Fe-Cr-Ni-Mo-C System
Autorzy:
Wieczerzak, K.
Bala, P.
Dziurka, R.
Stepien, M.
Tokarski, T.
Cios, G.
Gorecki, K.
Powiązania:
https://bibliotekanauki.pl/articles/352051.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Fe-Cr-Ni-Mo-C
in-situ composites
intermetallic compounds
dilatometry
microstructure
Opis:
The aim of the study was to synthesize and characterize the selected in-situ composites from the Fe-Cr-Ni-Mo-C system, additionally strengthened by intermetallic compounds. The project of the alloys was supported by thermodynamic simulations using Calculation of Phase Diagram approach via Thermo-Calc. Selected alloys were synthesized in an arc furnace in a high purity argon atmosphere using a suction casting unit. The studies involved a range of experimental techniques to characterize the alloys in the as-cast state, including optical emission spectrometry, light microscopy, scanning electron microscopy, electron microprobe analysis, X-ray diffraction and microhardness tests. These experimental studies were compared with the Thermo-Calc data and high resolution dilatometry. The results of investigations presented in this paper showed that there is a possibility to introduce intermetallic compounds, such as χ and σ, through modification of the chemical composition of the alloy with respect to Nieq and Creq. It was found that the place of intermetallic compounds precipitation strongly depends on matrix nature. Results presented in this paper may be successfully used to build a systematic knowledge about the group of alloys with a high volume fraction of complex carbides, and high physicochemical properties, additionally strengthened by intermetallic compounds.
Źródło:
Archives of Metallurgy and Materials; 2016, 61, 2B; 1241-1247
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The use of anamorphic images in the development of transit maps
Autorzy:
Stępień, T.
Klimczak, H.
Powiązania:
https://bibliotekanauki.pl/articles/145314.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
miejska sieć komunikacyjna
transport publiczny
miejska sieć drogowa
urban transport network
public transport
urban road network
Źródło:
Geodesy and Cartography; 2016, 65, 1; 81-94
2080-6736
2300-2581
Pojawia się w:
Geodesy and Cartography
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Use of numerical methods for identification of hydrodynamic field and hydrogeochemical processes in the Quaternary multi-aquifer system
Autorzy:
Gruszczyński, T.
Szostakiewicz-Hołownia, M.
Humnicki, W.
Małecki, J. J.
Porowska, D.
Stępień, M.
Powiązania:
https://bibliotekanauki.pl/articles/139099.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
quaternary multi-aquifer system
hydrodynamic field
hydrogeochemical processes
pole hydrodynamiczne
procesy hydrogeochemiczne
Opis:
The paper presents spatial analysis and numerical methods to describe the hydrodynamic and hydrochemical conditions in a groundwater system. The research was conducted in the northern part of the Białystok High Plane, eastern Poland, within a Quaternary multi-aquifer system. Spatial analysis was used for imaging the quasi-continuous structure of the system based on a discrete set of hydrogeological data. A high-resolution regional flow model was used to identify the groundwater discharge and discharge zones of the individual aquifers. Calculations have shown a marked asymmetry of the flow system. Deeply incised river valleys in the Niemen River basin more strongly affect the groundwater than the discharge zones in the valleys of the Vistula River basin. As a result, the underground watershed in deeper aquifers is clearly shifted westward in relation to the morphological watershed. The hydrodynamic conditions of the system determined by numerical methods were used to identify the points along the groundwater flow-path for the hydrochemical study. It was the basis for the identification of points located along the groundwater flow direction, which were used in the hydrochemical study. Computational schemes of water solution models were calculated for the quasi-equilibrium state of chemical reactions between the solution and the solid and gaseous phases. Presentation of the chemical reactions allowed determining the origin of changes in the concentrations of individual components dissolved in groundwater. It was found that kaolinitization, i.e. chemical weathering of feldspars and plagioclases is the basic process that most affects the groundwater chemistry.
Źródło:
Acta Geologica Polonica; 2016, 66, 3; 509-523
0001-5709
Pojawia się w:
Acta Geologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł

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