Autor: Olejnik, Ł. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Local political business cycles and administration spending in Polish local governments
Lokalne polityczne cykle koniunkturalne a wydatki administracyjne w polskich samorządach
Autorzy:: Olejnik, L.W.
Powiązania:: https://bibliotekanauki.pl/articles/2051491.pdf
Data publikacji:: 2019
Wydawca:: Akademia Bialska Nauk Stosowanych im. Jana Pawła II w Białej Podlaskiej
Tematy:: local political business cycles
regional studies
local government expenditures
Opis:: Subject and purpose of work: The purpose of this article is to verify the hypothesis of the occurrence of political business cycles at the self-governmental level in Poland. Materials and methods: The article presents a quantitative analysis of expenditures on remuneration in the administration of Polish self-governments at the county (district) level (in the period 2007–2018) and at province (regional) level (in the period 1999–2018) with the use of Arellano-Bond and LSDVC estimators. Results: The panel data analysis makes it possible to conclude that in Polish self-governments cyclical fluctuations of expenditure on remuneration can be observed. The increase in salaries depends on the power of the ruling coalition as well as unemployment and the output gap in a region. In the case of provinces and counties, also the increase of investment expenditures significantly affects the increase of salaries. Conclusions: The results of the estimation of models clearly point to the presence of cyclical distortions in remuneration in public administration, which are caused by the upcoming elections.
Przedmiot i cel pracy: Celem artykułu jest weryfikacja hipotezy o występowaniu politycznych cykli koniunkturalnych na poziomie samorządów w Polsce. Materiały i metody: Artykuł ten przedstawia ilościową analizę wydatków na wynagrodzenia w administracji w polskich samorządach na szczeblu powiatowym (lata 2007-2018) i wojewódzkim (lata 1999-2018) przy wykorzystaniu estymatorów Arellano-Bonda i LSDVC. Wyniki: Analiza danych panelowych pozwala stwierdzić, że w polskich samorządach można zaobserwować cykliczne wahania wydatków na wynagrodzenia. Wzrost wynagrodzeń jest zależny od siły koalicji rządzącej oraz bezrobocia i luki PKB w regionie. W przypadku województw i powiatów istotny wpływ na wzrost wynagrodzeń ma również wzrost wydatków inwestycyjnych. Wnioski: Wyniki estymacji modeli wyraźnie wskazują na obecność cyklicznych zaburzeń wynagrodzeń w administracji, które są spowodowane nadchodzącymi wyborami.
Źródło:: Economic and Regional Studies; 2019, 12, 2; 187-199
2083-3725
2451-182X
Pojawia się w:: Economic and Regional Studies
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Microstructure, Hardness and Wear Resistance of Local TiC-ZrO2/FeCr Reinforcement Fabricated in Situ in Steel Castings
Autorzy:: Sobula, S.
Olejnik, E.
Kurtyka, P.
Szymański, Ł.
Tokarski, T.
Powiązania:: https://bibliotekanauki.pl/articles/355914.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: wear resistance
composite casting
TiC reinforced cast steel
metal matrix composites
Opis:: Wear resistance of TiC-ZrO₂-Fe locally reinforced steel casting has been investigated. Composites were obtained by introducing to mould cavity compact with TiC reaction substrates, ZrO₂ particles and addition of moderator. Casting with local reinforcement – composite zone was obtained. Structure and microstructure of composite zone were investigated with use of X-ray diffraction (XRD) and scanning electron microscope (SEM) methods. The Miller slurry machine and Ball-on-Disc tester were used to determine wear resistance of the fabricated locally reinforced TiC-ZrO₂-Fe composites. The worn surface of specimens after test, was studied by SEM. Due to the presence of TiC and ZrO₂ particles in composite zone steel castings exhibited higher abrasion resistance than chromium white cast iron with Ni addition Ni-Hard 1 type and comparable with composites with high TiC content.
Źródło:: Archives of Metallurgy and Materials; 2018, 63, 1; 119-124
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Regional carbon uptake of croplands in Poland between 1960 and 2009
Autorzy:: Nyćkowiak, J.
Leśny, J.
Olejnik, J.
Merbold, L.
Niu, S.
Powiązania:: https://bibliotekanauki.pl/articles/108445.pdf
Data publikacji:: 2018
Wydawca:: Instytut Meteorologii i Gospodarki Wodnej - Państwowy Instytut Badawczy
Tematy:: pochłaniacz
węgiel
metodyka IPCC
plony
carbon sink
IPCC methodology
yields
Opis:: Croplands have been identified as binding large amounts of carbon. About one third of the total area in Poland is covered by croplands. In this paper, we analyze data describing the yields and structure of crops available for 13 selected subareas of Poland between 1960 and 2009 to evaluate the greenhouse gas mitigation potential due to carbon (C) uptake of this land cover type. Seven selected subareas located in Western Poland (area A), and six subareas in the southeast of Poland (area B) were chosen for detailed analysis. Cereals were identified as the most dominant crop planted in both areas during 1960-2009. Still, differences in yield could be found, with larger production in area A than in area B. By the year 2009, arable land (cereals, beetroot, potato, rapeseed and maize) covered nearly 10 Mio ha of Poland. The average uptake of C by crops between 1960 and 2009 was 3,24 ± 0,17 Mg C ha-1 a-1 for area A, 2,84 ± 0,12 Mg C ha-1 a-1 for area B and 2,88 ± 0,11 Mg C ha-1 a-1 for the whole country. Given the fact that about 3% of the total assimilated carbon remains in the soil, we calculated that 0,98 Tg C were stored in Polish croplands in 2009. Due to this fact, croplands are short time storage of carbon and thus contribute to greenhouse gas mitigation.
Źródło:: Meteorology Hydrology and Water Management. Research and Operational Applications; 2018, 6, 1; 67-76
2299-3835
2353-5652
Pojawia się w:: Meteorology Hydrology and Water Management. Research and Operational Applications
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Biological evaluation and surface properties of Ti-DLC coatings deposited by magnetron sputtering
Autorzy:: Olejnik, A
Sobczyk-Guzenda, A.
Świątek, L.
Jastrzębski, K.
Bociąga, D.
Powiązania:: https://bibliotekanauki.pl/articles/285544.pdf
Data publikacji:: 2016
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:: DLC coatings
magnetron sputtering
implants
Opis:: During the last few decades, a growing demand for medical implants may be observed on the market. This is a consequence of both the increasing number of people suffering from disabilities as well as technological development. As a result of growing number of trauma injuries, orthopaedic and bone implants are one of the branches of the medical device industry showing the fastest growth opportunities. However, the commonly applied metallic implants do not exhibit total chemical stability in human body environment and hence, possess relatively poor surface properties [1]. For that reason, even the corrosion resistant metals may release degradation products and cause adverse biological response1. Consequently, surface modifications of metallic implants which enhance the biological response of the human body towards the surface of the implant are recently gaining a lot of interest. One of the most extensively studied solutions include the application of diamond-like carbon (DLC) coatings which exhibit a combination of highly desirable properties in the context of biomedical applications [2]. Furthermore, the properties of DLC coatings, such as cell behaviour and body reaction towards its surface, may be further improved by doping with various elements [3]. Therefore, the modified DLC coatings are nowadays extensively researched in terms of their possible medical applications. In the case of orthopaedic implants the enhancement of the osseointegration process is highly desirable in order to assure the proper bone-healing, what according to the literature may be achieved by the addition of titanium (Ti). The incorporation of Ti into the DLC matrix does not only promote the bone marrow cells proliferation, but also simultaneously reduces the activity of the osteoclast-like cells as indicated by Shroeder et al. [4]. Similarly, also Thorwarth et al. demonstrated that carbon coatings containing TiO exhibit promising results concerning the proliferation and differentiation of human osteoblasts [5]. Nevertheless, in spite of the numerous studies considering the biological behaviour of Ti-incorporated DLC coatings, there is lack of conclusive reports considering the biological applications of coatings deposited by a magnetron sputtering technique. Taking this into consideration, a complex biological evaluation of Ti-DLC coatings followed by their surface characteristics was performed, since surface properties have a direct role in different post-implantation reactions including protein adsorption and cell proliferation [1]. The examined coatings were deposited on two commonly applied metallic biomaterials (AISI 316 LVM steel and Ti6Al7Nb alloy) using a magnetron sputtering technique. The surface characteristics of the deposited Ti-DLC coatings included the analysis of surface morphology (SEM), chemical composition and structure (XPS, FTIR) as well as surface wettability and surface free energy (sessile drop technique and Owens-Wendt’s model). The biological assessment of the deposited coatings was based on two complementary cell proliferation and viability assays (LIVE/DEAD and XTT test) performed with the use of two different cell lines, i.e. endothelial cells line EA.hy926 and osteoblast-like cells line Saos-2. The obtained results allowed to check the influence of titanium on the biological response of two different cell lines towards the Ti-DLC coatings deposited using magnetron sputtering method as well as to correlate the obtained results with the surface properties of the investigated coatings.
Źródło:: Engineering of Biomaterials; 2016, 19, 138; 105
1429-7248
Pojawia się w:: Engineering of Biomaterials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Hardness and Wear Resistance of TiC-Fe-Cr Locally Reinforcement Produced in Cast Steel
Autorzy:: Olejnik, E.
Szymański, Ł.
Kurtyka, P.
Tokarski, T.
Grabowska, B.
Czapla, P.
Powiązania:: https://bibliotekanauki.pl/articles/947363.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: reinforcement
castings
hardness
wear resistance
in situ TiC
ball-on-disk
zbrojenie
odlew
twardość
odporność na ścieranie
Opis:: In order to increase wear resistance cast steel casting the TiC-Fe-Cr type composite zones were fabricated. These zones were obtained by means of in situ synthesis of substrates of the reaction TiC with a moderator of a chemical composition of white cast iron with nickel of the Ni-Hard type 4. The synthesis was carried out directly in the mould cavity. The moderator was applied to control the reactive infiltration occurring during the TiC synthesis. The microstructure of composite zones was investigated by electron scanning microscopy, using the backscattered electron mode. The structure of composite zones was verified by the X-ray diffraction method. The hardness of composite zones, cast steel base alloy and the reference samples such as white chromium cast iron with 14 % Cr and 20 % Cr, manganese cast steel 18 % Mn was measured by Vickers test. The wear resistance of the composite zone and the reference samples examined by ball-on-disc wear test. Dimensionally stable composite zones were obtained containing submicron sizes TiC particles uniformly distributed in the matrix. The macro and microstructure of the composite zone ensured three times hardness increase in comparison to the cast steel base alloy and one and a half times increase in comparison to the white chromium cast iron 20 % Cr. Finally ball-on-disc wear rate of the composite zone was five times lower than chromium white cast iron containing 20 % Cr.
Źródło:: Archives of Foundry Engineering; 2016, 16, 2; 89-94
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: New Textiles Designed for Anti-Radar Camouflage
Nowe konstrukcje włókiennicze maskujące przeciwradiolokacyjnie
Autorzy:: Redlich, G.
Obersztyn, E.
Olejnik, M
Fortuniak, K
Bartczak, A
Szugajew, L
Jarzemski, J.
Powiązania:: https://bibliotekanauki.pl/articles/232241.pdf
Data publikacji:: 2014
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Tematy:: woven fabric
knitted fabric
anti-radar camouflage
reflection coefficient
transmission coefficient
time domain
microwave measurements
tkaniny
dzianiny
kamuflaż anty-radar
współczynnik odbicia
współczynnik transmisji
pomiary mikrofalowe
Opis:: This paper presents newly designed textiles (woven and knitted fabrics) for camouflage against radar, with a particular emphasis on the conductive yarns applied and their distribution throughout the structure of the goods. The levels obtained for the coefficients of re- flection and the transmission of electromagnetic waves have been discussed for woven and knitted fabrics, both raw and those subjected to finishing treatment. These parameters were determined using two methods: waveguide applicators and in the space in a semi-anechoic chamber within the time domain. The issues this publication covers are an integral part of research on developing textile products featuring a broad spectrum of masking, i.e. within the visible (VIS), near infrared (IR), and that of the subject - the anti-radar band. The first two types of camouflage were discussed in an earlier publication entitled “Assessment and Verification of the Functionality of New, Multi-component, Camouflage Materials” (Fibres & Textiles in Eastern Europe 2013; 21, 5(101): 73-79).
W artykule przedstawiono nowoopracowane konstrukcje włókiennicze (tkaniny, dzianiny) maskujące przeciwradiolokacyjnie, ze szczególnym uwzględnieniem zastosowanych przędz konduktywnych oraz ich rozkładu w strukturze wyrobów. Omówiono poziomy uzyskanych wartości współczynników odbicia i transmisji fal elektromagnetycznych, zarówno dla tkanin i dzianin surowych, jak i poddanych obróbce wykańczalniczej. Parametry te były wyznaczane z zastosowaniem dwóch metod tj. z wykorzystaniem aplikatorów falowodowych oraz w przestrzeni w komorze bezechowej w domenie czasu. Zagadnienia ujęte w niniejszej publikacji stanowią integralną część badań nad opracowaniem wyrobów włókienniczych o szerokim spektrum maskowania, tj. w zakresie widzialnym (VIS), bliskiej podczerwieni (IR) oraz przedmiotowym czyli przeciwradiolokacyjnym. Dwa pierwsze rodzaje maskowania zostały przedstawione we wcześniejszej publikacji pt. „Assessment and verification of functionality of new, multi-component, masking materials ”(Fibres & Textiles in Eastern Europe 2013; 21, 5(101): 73-79).
Źródło:: Fibres & Textiles in Eastern Europe; 2014, 1 (103); 34-42
1230-3666
2300-7354
Pojawia się w:: Fibres & Textiles in Eastern Europe
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Locally Reinforcement TiC-Fe Type Produced in Situ in Castings
Autorzy:: Olejnik, E.
Szymański, Ł.
Kurtyka, P.
Tokarski, T.
Maziarz, W
Grabowska, B.
Czapla, P.
Powiązania:: https://bibliotekanauki.pl/articles/380995.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: MMCs
reinforcement
TiC
in situ
hardness
ball-on-disc
zbrojenie
twardość
Opis:: Refinement is one of the most energy consuming technological process, aimed at obtaining mineral raw materials of the proper grain size. Cast structural elements such as jaws or hammers in crushing machines operate under conditions of an intensive wear. The data indicate that 80% of failures of machines and devices is caused by wearing of rubbing surfaces. This problem became the subject of several scientific and industrial investigations carried out in the whole world in order to produce materials ultra- wear resistant. Methods allowing to obtain wear resistant composite castings are discussed in the hereby paper. Within the performed research microstructures of the produced composite zones were presented and the comparative analysis with regard to mechanical and functional properties of local composite reinforcements in relation to the commercial alloys of increased wear resistance was performed. The results show almost twenty five times increase in wear resistance compared to manganese cast steel containing 18% Mn.
Źródło:: Archives of Foundry Engineering; 2016, 16, 3; 77-82
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Doubled haploids as a material for biotechnological manipulation and a tool for rapid breeding of winter oilseed rape (Brassica napus L.)
Autorzy:: Cegielska-Taras, T.
Szala, L.
Sosnowska, K.
Olejnik, A.
Poplawska, W.
Matuszczak, M.
Mikolajczyk, K.
Hernacki, B.
Powiązania:: https://bibliotekanauki.pl/articles/951203.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: oilseed rape
Brassica napus
doubled haploid
in vitro culture
chromosome doubling
haploid plant
gene mapping
QTL marker
androgenesis
Źródło:: BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2015, 96, 1
0860-7796
Pojawia się w:: BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Spectral Dependence of Fluorescence Enhancement in LH2-Au Nanoparticle Hybrid Nanostructures
Autorzy:: Bujak, L.
Brotosudarmo, T.
Czechowski, N.
Olejnik, M.
Ciszak, K.
Litvin, R.
Cogdell, R.
Heiss, W.
Mackowski, S.
Powiązania:: https://bibliotekanauki.pl/articles/1419487.pdf
Data publikacji:: 2012-08
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 87.80.Dj
78.47.D-
78.67.Qa
82.35.Np
Opis:: We report on the influence of plasmon resonance in spherical gold nanoparticles on the optical properties of light-harvesting complex LH2 from the purple bacteria Rhodopseudomonas palustris. Systematic studies as a function of the excitation energy and the separation distance indicate that metal enhanced fluorescence shows strong dependence upon both of these parameters. We observe substantial increase of the fluorescence from LH2 complex in a hybrid nanostructure with 12 nm silica spacer. On the other hand, the enhancement measured with laser tuned into the plasmon resonance is almost threefold compared to the off-resonance configuration. The enhancement of fluorescence intensity originates in both cases from the increase of carotenoid absorption in the LH2 complex.
Źródło:: Acta Physica Polonica A; 2012, 122, 2; 252-254
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki