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Tytuł:
Wpływ zasobności drzewostanów sosnowych na ustalanie ekonomicznego wieku dojrzałości rębnej
Impact of Scots pine stand growing stock on determining the optimal economic rotation age
Autorzy:
Parzych, S.
Mandziuk, A.
Wysocka-Fijorek, E.
Powiązania:
https://bibliotekanauki.pl/articles/986601.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
gospodarka lesna
drzewostany sosnowe
zasobnosc drzewostanu
wiek dojrzalosci rebnej
optymalizacja
klasy bonitacji
timber price
rotation age
optimization methods timber production
site class index
Opis:
The stand volume is one of the forest inventory characteristic determined during the field work aimed at planning operations in the tree stands. Determining the optimal rotation age is an important decision issue in the forest management. In turn, the key factor that determines the choice of the method for determining the rotation age of the tree stands is the production target. Depending on the rotation age, a specific structure of quantity, quality and dimensions of particular timber assortments is obtained. It seems reasonable that the economic rotation age is one of the main criteria taken into account when planning forest management in tree stands or forest district. The aim of the paper is to assess the impact of growing stock on determining the rotation age of Scots pine stands in particular site index classes. We compared the tabular (i.e. based on data from yield tables) and real (i.e. based on data from the Information System of the State Forests) volume of pine stands. The analysis was based on the forest description data, the amount of the harvested timber and economic data: timber price as well as the costs of harvesting, skidding and production of assortments. The optimal economic rotation age was determined as the point of intersection of the curve describing the average and current increment of the value of Scots pine stands. The research showed that the rotation age of stands is related to the site index class and whether real or tabular results are analysed. The optimal rotation age for Scots pine tree stands is lower in the real data model from 10 to 23 years from that calculated on the basis of tabular data.
Źródło:
Sylwan; 2018, 162, 08; 671-678
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ odprowadzania wód radowych z kopalń na skażenie środowiska naturalnego
Influence of the discharge of radium-bearing waters from coal mines on the contamination of the natural environment
Autorzy:
Chałupnik, S.
Wysocka, M.
Powiązania:
https://bibliotekanauki.pl/articles/340947.pdf
Data publikacji:
2003
Wydawca:
Główny Instytut Górnictwa
Tematy:
woda kopalniana
woda radowa
skażenie promieniotwórcze
skażenie środowiska
wody zrzutowe
radon
monitoring skażenia
coal water
radium-bearing water
environment contamination
radiactive contamination
radium
contamination monitoring
Opis:
Wody radowe odprowadzane z kopalń węgla kamiennego do osadników powierzchniowych a stamtąd do rzek powodują czasem skażenia promieniotwórcze. Od 1986 roku obowiązują wytyczne [12], zgodnie z którymi kopalnie są zobowiązane do monitoringu naturalnych izotopów promieniotwórczych w wodach zrzutowych i w ciekach powierzchniowych poniżej punktu zrzutu. Pomimo to kontrola stężeń izotopów radu w wodach rzecznych jest prowadzona jedynie okazjonalnie. W latach 1993-1994 kontrole były prowadzone przez Laboratorium Radiometrii Głównego Instytutu Górnictwa [20]. Od tego czasu sytuacja uległa znaczącej zmianie - w niektórych kopalniach wprowadzono metody ograniczania dopływów wód słonych do wyrobisk podziemnych, w innych zastosowano technologie usuwania radu z wód kopalnianych, które są prowadzone w wyrobiskach podziemnych, a część kopalń została zlikwidowana. Stąd potrzeba powtórzenia badań środowiskowych rzek na terenie Śląska. Określenie zależności między wynikami pomiarów stężeń radu w wodach rzecznych i wynikami systematycznego monitoringu wód zrzutowych kopalń, pozwoli na powtórzenie bilansu ładunku radu odprowadzanego do środowiska naturalnego. Umożliwi to ocenę efektywności działań podjętych przez kopalnie w celu obniżenia czy wręcz zaprzestania dalszego zanieczyszczania środowiska naturalnymi izotopami promieniotwórczymi.
Saline waters from underground coal mines in Poland often contain natural radioactive isotopes, mainly 226Ra from the uranium decay series and 228Ra from the thorium series. Approximately 60% of the total amount of radium remains underground as radioactive deposits, but 120 MBq of 226Ra and 200 MBq of 22SRa are released daily into the rivers along with the other mine effluents from all Polish coal mines. Technical measures such as inducing the precipitation of radium in gobs, decreasing the amount of meteoric inflow water into underground workings etc., have been undertaken in several coal mines, and as a result of these measures the total amount of radium released to the surface waters has diminished by about 60% during the last 5-6 years. Mine water can have a severe impact on the natural environment, mainly due to its salinity. However associated high levels of radium concentration in river waters, bottom sediments and vegetation have also been observed. Sometimes radium concentrations in rivers exceed 0.7 kBq/m3 , which is the permissible level for waste waters under Polish law. The extensive investigations described here were carried out for all coal mines and on this basis the total radium balance in effluents has been calculated. Measurements in the vicinity of mine settling ponds and in rivers have given us an opportunity to study radium behaviour in river waters and to assess the level of contamination.
Źródło:
Prace Naukowe GIG. Górnictwo i Środowisko / Główny Instytut Górnictwa; 2003, 2; 49-58
1643-7608
Pojawia się w:
Prace Naukowe GIG. Górnictwo i Środowisko / Główny Instytut Górnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ dodatku karotenów naturalnych lub syntetycznego beta-karotenu do dawki pokarmowej na zawartość beta-karotenu i witaminy A w osoczu krwi i płodność krów
The effect of natural or synthetic beta-carotene supply in the ration on beta-carotene and vitamin A level in blood plasma and fertility of lactatic cows
Vlijanie pribavki estestvennykh karotinov beta-karotina k racionu na soderzhanie beta-karotina i vitamina A v plazme krovi i plodovitost korov
Autorzy:
Iwanska, S.
Lewicki, C.
Minakowski, D.
Glazer, T.
Markiewicz, E.
Wysocka, Z.
Powiązania:
https://bibliotekanauki.pl/articles/807088.pdf
Data publikacji:
1989
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
karoteny naturalne
syntetyczny beta-karoten
dawki pokarmowe
beta-karoten
witamina A
osocze
krew
plodnosc
krowy
Opis:
The study was carried out on 24 cows and 20 heifers of the black-and-white breed in conditions of commercial production. The animals before calving were assigned randomly to 4 groups. Each group had 2 subgroups of 6 multiparous cows (A) and 5 heifers (B). The control group (I) did not receive any additional carotene or vitamin A. Cows in group II were given additional 300 mg of synthetic β-carotene (Rovimix-Rache) daily during 10 days before and 60 days after the delivery. In group III dried carrots were given in the same period, the rations being equivalent to 300 mg of β-carotene. In group IV vitamin A (1.800.00 i.w) was injected three times (10 days before the delivery, and 7 - 10 and 30 days after the delivery), so as to equlize the addition of β-arotene in groups II and III. Cows of all groups were fed similarly. During winter corn silage (30 kg), pellets (5 kg), sugar beet pulp (0.5 - 3 kg) and a concentrate were used. In summer zero-grazing (grass mixture) was used (60 kg) together with an addition of dried green forage (1 kg). Addition of β-carotene to the ration, both as regards synthetic carotene (Rovomix-Roche) and dried carrots, alleviated carotene and vitamin A deficiency in blood plasma during the first two months after delivery. The effect of vitamin A injections on the level of this vitamin in blood plasma was negligible. Carotene addition to the ratipn affected also the dynamics of β-carotene and vitamin A passing to milk in the first 100 days of lactation. The best indices of fecundity were obtained for cous receiving rations supplemented with synthetic carotene. Influence of β-carotene supply in the ration on fertility of first calving cows (B) has not been clarified. Good results of fertility were found for first calving cous reciving vitamin A injection.
Исследования проведено в условиях промышленной продукции на 24 коровах и 20 высокотелышх тёлках породы чёрно-белой. Животные поделили на 4 группы, которые обнимали 2 подгруппы: А - коровы по 3 - 4 лактациях и В - первотёлки. В I группе (контрольной) применяемый кормовый рацион не был обогащён добавочно каротином. Животные II группы І0 дней перед и 60 дней после отеления получали на голову в корме мг синтетического β-каротина (Ровимикс-Рош). В III группе (в темже периоде) применяли прибавку сухой моркови в количестве эквивалентном 300 мг β-каротина. В ІУ группе сделано 3-кратную инъекцию витамина А (1.800.000 ME), I0 дней перед отелом, 7 - 10 и 30 дней после отела. Коровы во всех группах кормлено одиноково применяя во-время зимового кормления силос с кукурузы (30 кг), брикетный корм (5 кг), сухой жом (0,5 - 3 кг) и концентрат. Во время летнего периода применяли кормление в стойле зелёным кор мом с трав (60 кг) и травянной мукой (1 кг). Применение во время зимового кормления коров прибавки β-каротина в синтетическом или естественном виде повлияло на: - сглаждение недостатка β-каротина в плазме крови в первых 2 месяцах после отёла, - высшую эффективность оплодотворения во-время первой течки после отела. Не доказано стимулирующего влияния Ровимиксу и сухой моркови на исследованные показатели у первотёлок, у которых высшуюэффективность оплодотворения получено применяя инъекцию витамина А.
Źródło:
Zeszyty Problemowe Postępów Nauk Rolniczych; 1989, 360
0084-5477
Pojawia się w:
Zeszyty Problemowe Postępów Nauk Rolniczych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Weighting of new starch-polymer salted mud with PT-23 polymer
Autorzy:
Wysocki, S.
Bielewicz, D.
Wysocka, M.
Lewicki, D.
Wilaszek, J.
Powiązania:
https://bibliotekanauki.pl/articles/298703.pdf
Data publikacji:
2014
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
drilling muds
weighting materials
starch mud
Opis:
Rheological properties of mud should assure high rate of penetration and supply maximal hydraulic power to the hole bottom. From this point of view drilling mud should have as little density and viscosity as possible and also minimal solid phase fraction. By the reason of the hole depth and geological conditions in the region it often occurs that maintenance of low density is impossible and drilling mud have to be treated with weighting materials. The process may cause change of mud rheological parameters and cause decrease of penetration rate. In case of weighted mud there is also a problem consisting in sedimentation of weighting material. During these project realization there was developed recipe of new mud for well completion with new PT-23 polymer. The next step was testing of possibilities of weighting the mud with different weighting materials: barite with grain size lower than 75 um, barite with grain size lower than 25 um, commercial barite, hematite, bridging agent M-25. Barite with grain size lower than 75 um and barite with grain size lower than 25 um were conditioned in water, then wet separated into fractions.
Źródło:
AGH Drilling, Oil, Gas; 2014, 31, 1; 157-165
2299-4157
2300-7052
Pojawia się w:
AGH Drilling, Oil, Gas
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Usuwanie ortofosforanów ze ścieków syntetycznych o neutralnym i alkalicznym odczynie z wykorzystaniem metody roztwarzania metali i elektrokoagulacji
Orthophosphates Removal from Synthetic Neutral and Alkaline Wastewater Using the Electrocoagulation and the Metal Dissolution Methods
Autorzy:
Wysocka, I.
Kisielewska, M.
Rynkiewicz, M. R.
Konopka, S.
Powiązania:
https://bibliotekanauki.pl/articles/1819125.pdf
Data publikacji:
2013
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
usuwanie ortofosforanów
ścieki syntetyczne
pH
chitin
orthophosphates removal
wastewater
Opis:
The main objective of this paper was to compare efficiency of electrocoagulation and metal dissolution methods in orthophosphate removal from synthetic wastewater at 7.0 and 8.0 pH. The research was conducted with usage of steel electrodes with 1414 cm2 contact surface, which were corroding and releasing iron ions responsible for orthophosphate precipitation. The electrocoagulation process with alkaline wastewater (8.0 pH) was additionally using a direct electrical current with intensity of 0.1 A and voltage of 1.5 V. Changes of the pH value, orthophosphate and iron ions content were also measured. Obtained results show, that wastewater treatment from orthophosphate with electrocoagulation takes place much faster than with metal dissolution method. Complete orthophosphate removal (starting concentration was 10.5 mg P/dm3) with electrocoagulation process occurred after 415 minutes of research, when metal dissolution method obtained the same effect after 1445 minutes. In the wastewater with starting 7.0 pH and with electrocoagulation, the total dephosphatation occurred after 1440 min, but the metal dissolution method after this time ensure only 37% reduction in the orthophosphate concentration. The pH value of treated wastewater increased during the every study. The most noticeable increase was while using electrocoagulation process, which attained 11.1 pH (wastewater with starting 8.0 pH) and 10.8 pH (wastewater with starting 7.0 pH) after 1440 minutes. Applying the metal dissolution method increase in pH was lower, was respectively 8.8 pH and 8.6 pH. Concentration of iron ions concentration also increased in treated wastewater. In the wastewater with starting 8.0 pH, from 0.00 mg Fe/dm3 to 0.16 mg Fe/dm3 with metal dissolution method and 0.00 mg Fe/dm3 to 0.46 mg Fe/dm3 with electrocoagulation. In the wastewater with starting 7.0 pH, the maximum observed total iron concentration was 0.04 mg Fe/dm3. Electrocoagulation method turned out to be more effective in orthophosphate removal from wastewater than metal dissolution method, which occurred in shorter time needed for dephosphatation. However it requires a more consumables funding related to the use of energy and electrodes wearing faster.
Źródło:
Rocznik Ochrona Środowiska; 2013, Tom 15, cz. 3; 2725-2737
1506-218X
Pojawia się w:
Rocznik Ochrona Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The usefulness of ground-penetrating radar images for the research of a large sand-bed braided river: case study from the Vistula River (central Poland)
Autorzy:
Lejzerowicz, A.
Kowalczyk, S.
Wysocka, A.
Powiązania:
https://bibliotekanauki.pl/articles/94393.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
sedimentary architecture
sand-bed braided river
lithofacies
ground-penetrating radar
radar facies
Vistula River
architektura sedymentacyjna
piaskodenna rzeka roztokowa
litofacje
georadar
Wisła
Opis:
Ground-penetrating radar (GPR) surveys and sedimentological outcrop analyses were combined in order to determine the reflection patterns and internal architecture of terrace deposits of the Vistula River at Kępa Zawadowska in the southern part of Warsaw (central Poland). The sedimentary analyses concerned the granulometric composition and lithofacies analysis. The 34 GPR profiles, which were obtained in two outcrops, using a Malå RAMAC/GPR system with 500-MHz and 250-MHz shielded antennas, were up to 100 m long. The most characteristic ground-penetrating radar profiles are presented; they show a high-resolution data set of radar facies. The GPR data suggest the presence of three geophysically different units, namely with high-angle inclined reflections (radar facies 1), with discontinuous undulating or trough-shaped reflections (radar facies 2), and with low-angle reflections (radar facies 3). The internal structure of the fluvial deposits was obtained by integration of the GPR and sedimentological data, which combination provides a more accurate visualisation of sedimentary units than do reconstructions that are based only on standard lithologic point data.
Źródło:
Geologos; 2014, 20, 1; 35-47
1426-8981
2080-6574
Pojawia się w:
Geologos
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The role of soft skills in FL learning
Autorzy:
Wysocka, Marzena S.
Powiązania:
https://bibliotekanauki.pl/articles/577053.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
soft skills
social skills
personal skills
soft skill training
Opis:
The paper constitutes an attempt to define the role of soft skills in the process of FL learning. The data derive from the questionnaire distributed among the English philology students, and reveal the subjects’ attitudes to the qualities under investigation, as well as their strengths and weaknesses within the competences given. Having identified the students’ needs, the author of the project suggests ways of developing and promoting soft skills when shaping FL competence.
Źródło:
Linguistica Silesiana; 2012, 33; 257-268
0208-4228
Pojawia się w:
Linguistica Silesiana
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The origin and depositional architecture of Paleogene quartz-glauconite sands in the Lubartów area, eastern Poland
Autorzy:
Czuryłowicz, K.
Lejzerowicz, A.
Kowalczyk, S.
Wysocka, A.
Powiązania:
https://bibliotekanauki.pl/articles/2059959.pdf
Data publikacji:
2014
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
littoral facies
syndepositional tectonics
extensional graben
sequence stratigraphy
ground penetrating radar
3D modelling
Opis:
The study uses quantitative methods to analyse the latest Bartonian to Early Rupelian sedimentary succession at the SE outskirts of the Polish Lowland Paleogene Basin, in the back-bulge zone of the Carpathian orogenorebulge. The vertical lithotype proportion diagrams from a large number of well logs are compiled to reveal the area’s sequence stratigraphy. Six sequences are recognized and correlated with 3rd-order eustatic sea level cycles. The basal sequence of type 1 is overlain by three sequences of type 2 and followed by a fifth sequence of type 1, whose depositional forced-regressive and lowstand systems tracts brought the main volume of quartz-glauconite sand to the study area. The study focuses further on the deposits of this fifth sequence, exposed and surveyed with GPR in the Nowodwór-Piaski sand pit. Their sedimentary facies analysis reveals the local spatial pattern of a wave-dominated and tidally-influenced sedimentation, supporting the earlier notions of a southern palaeoshoreline and a tectonically-controlled sedimentation.The analysis, aided by multidimensional GPR survey, indicates syndepositional development of a tectonic graben filled laterally by fault scarp-attached large sand bars and an axial action of tidal ebb currents. The bars were formed of shore-derived sand swept by littoral waves from the graben footwall areas. As the graben’s tectonic activity ceased, it became buried by the lowstand regressive sands overlain by gravelly foreshore deposits, most of which were later removed by the Pleistocene glacial erosion. A 3D model of the deposits in the Nowodwór-Piaski area is constructed on the basis of outcrop and GPR data with the use of multiple-point statistical methodology to depict the internal architecture, heterogeneity and spatial relationships of main sedimentary facies. The model can serve as a guide for the future exploration and exploitation of the quartz-glauconite sands in the area and as instructive example of how a petroleum reservoir model of a complex sedimentary succession can be constructed with the use of modern statistical methods.
Źródło:
Geological Quarterly; 2014, 58, 1; 125--144
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of selenium and vitamin E supplementation on cytological assessment of red blood cell line of bone marrow in fallow deer kept in captivity
Autorzy:
Snarska, A.
Wysocka, D.
Rytel, L.
Żarczyńska, K.
Sobiech, P.
Gonkowski, S.
Powiązania:
https://bibliotekanauki.pl/articles/2087707.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
bone marrow
hematopoiesis
erythroblast
selenium
vitamin E
Źródło:
Polish Journal of Veterinary Sciences; 2018, 21, 3; 431-436
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The applicability of C-14 measurements in the soil gas for the assessment of leakage out of underground carbon dioxide reservoirs
Autorzy:
Chałupnik, S.
Wysocka, M.
Powiązania:
https://bibliotekanauki.pl/articles/148781.pdf
Data publikacji:
2014
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
greenhouse gases
carbon dioxide sequestration
radiocarbon
liquid scintillation spectrometry
Opis:
Poland, due to the ratification of the Kioto Protocol, is obliged to diminish the emission of greenhouse gases. One of the possible solutions of this problem is CO2 sequestration (CCS – carbon capture and storage). Such an option is a priority in the European Union. On the other hand, CO2 sequestration may be potentially risky in the case of gas leakage from underground reservoirs. The most dangerous event may be a sudden release of the gas onto the surface. Therefore, it is very important to know if there is any escape of CO2 from underground gas reservoirs, created as a result of sequestration. Such information is crucial to ensure safety of the population in areas located above geological reservoirs. It is possible to assess the origin of carbon dioxide, if the measurement of radiocarbon 14C concentration in this gas is done. If CO2 contains no 14C, it means, that the origin of the gas is either geological or the gas has been produced as a result of combustion of fossil fuels, like coal. A lot of efforts are focused on the development of monitoring methods to ensure safety of CO2 sequestration in geological formations. A radiometric method has been tested for such a purpose. The main goal of the investigations was to check the application possibility of such a method. The technique is based on the liquid scintillation counting of samples. The gas sample is at first bubbled through the carbon dioxide adsorbent, afterwards the adsorbent is mixed with a dedicated cocktail and measured in a low-background liquid scintillation spectrometer Quantulus. The described method enables measurements of 14C in mine and soil gas samples.
Źródło:
Nukleonika; 2014, 59, 1; 3-7
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Survivin expression in canine lymphomas in relation with proliferative markers
Autorzy:
Sokolowska, J.
Urbanska, K.
Gizinski, S.
Wysocka, A.
Cywinska, A.
Lechowski, R.
Powiązania:
https://bibliotekanauki.pl/articles/2087990.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:
Survivin is a member of apoptosis inhibiting proteins family. Apart from its antiapoptotic activity it plays a critical role in regulating the cell cycle and mitosis. It is overexpressed in most human malignancies. While the prognostic significance of survivin expression is widely investigated in human non-Hodgkin's lymphomas, little is known about its expression in canine lymphomas. The aim of the study was to evaluate the expression of survivin in canine lymphomas in relation to proliferation markers (mitotic index and percentage of Ki67-positive cells). Survivin was found in all examined lymphomas belonging to 6 different morphological subtypes with nuclear immunoreactivity. In most of lymphomas (18/25) survivin expression ranged 10%-25% of positive cells. Only single cases had lower (0-10% positive cells, 1/25) or higher (25-50% and >50% positive cells, 5/25 and 1/25, respectively) index of survivin. Neither mitotic index nor proliferative index correlated with survivin expression when the values quantified randomly in whole specimens were compared. However, when survivin expression were quantified in selected tumor areas of low and high proliferation activity the high correlations between survivin expression and proliferation index were found. The results indicated that survivin is commonly expressed in canine lymphomas. Nuclear labelling together with the relation of its expression and proliferative activity in highly proliferative areas of neoplastic tissue suggest a potential role of survivin in cell cycle activation in canine lymphoma cells. However, further studies of the relation between expression of survivin and other proteins involved in cell cycle regulation are needed. Moreover, the results suggest that survivin may pose the therapeutic target in canine lymphomas.
Źródło:
Polish Journal of Veterinary Sciences; 2015, 18, 1
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Struktura sortymentowa pozyskiwanego drewna w podklasach wieku w wybranych rodzajach rębni w drzewostanach sosnowych
Assortment structure of harvested wood in age subclasses in selected cutting systems in Scots pine stands
Autorzy:
Parzych, S.
Mandziuk, A.
Wysocka-Fijorek, E.
Powiązania:
https://bibliotekanauki.pl/articles/980187.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
Panstwowe Gospodarstwo Lesne Lasy Panstwowe
drzewostany sosnowe
rebnie
sosna zwyczajna
Pinus sylvestris
pozyskiwanie drewna
struktura sortymentowa
management system
cutting system
assortment of wood
scots pine
Opis:
Scots pine is the dominant forest tree species in Poland covering 58.0% of the forest area and constituting 61.1% of timber resources. Theoretically, all types of cuttings can be used in pine stands, but the purpose of the paper is to analyse the share of the main groups of assortments obtained from such stands with the use of: clear, group and gradual cuttings. It should be remembered that all types and forms of cutting are ideological, and the choice of a particular system should be determined by the silviculture goal. We used the data from the years 2012−2014 to conduct the research. The analysis covered Scots pine stands from all forest districts of the State Forests National Forest Holding, in which this species had a share of 80 to 100%. We analysed clear (I), group (III) and gradual (IV) cutting systems. Over 3.1 million hectares of mono−species pine stands was analysed. Numerical data was obtained from the database of the State Forests Information System. The studies took into account the assortments that actually occurred in a given subclass of age, divided into the type of cuttings, aggregated into three categories: small, medium and large−sized timber. In Poland, in mono−species Scots pine stands, mainly I and III cutting systems (about 97% of analysed stands) were used, the remaining types of treatments were sporadic. The largest share of harvest was characterized by the pulpwood assortment in harvesting I and III and the sawmill wood in the IV cutting system. With age, a decrease in the proportion of small−sized assortments and a gradual increase in the share of large−sized assortments was observed, while in the case of medium−sized assortments, the culmination of the share occurs at the age of 35−45 years, in all the analysed cutting systems. The course of the fraction of sub−classes in the case of large and medium−sized assortments in I and III cutting systems was similar.
Źródło:
Sylwan; 2019, 163, 09; 707-715
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simulation of computed tomography (CT) images using a Monte Carlo approach
Autorzy:
Wysocka-Rabin, A. M.
Qamhiyeh, S.
Jäkel, O.
Powiązania:
https://bibliotekanauki.pl/articles/147601.pdf
Data publikacji:
2011
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
X-ray tomography
Monte Carlo (MC) method
treatment planning
hadrontherapy
Opis:
Heavy ion treatment planning uses an empirical scanner-dependent calibration relation between computed tomography (CT) numbers and ion range. Any deviation in the values of CT numbers will cause a drift in the calibration curve of the CT scanner, which can reduce the accuracy of treatment beam delivery. To reduce uncertainty in the empirical estimation of CT numbers, we developed a simulation that takes into consideration the geometry, composition, and physical process that underlie their measurement. This approach uses Monte Carlo (MC) simulations, followed by a simple filtered back-projection reconstruction. The MC code used is BEAMnrc/EGSnrc. With the manufacturer’s permission, we simulated the components (X-ray tube, associated filters and beam shapers) of a Siemens Emotion CT. We then generated an initial beam shape and spectra, and performed further simulations using the phantom with substitutes. We analyzed the resulting phase space file to calculate projections, taking into account the energy response of the CT detectors. Then, we applied a simple reconstruction algorithm to the calculated projections in order to receive the CT image.
Źródło:
Nukleonika; 2011, 56, 4; 299-304
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Review of Grażyna Kiliańska-Przybyło (2017). The Anatomy of Intercultural Encounters. A Sociolinguistic Cross-Cultural Study
Autorzy:
Wysocka, Marzena S.
Powiązania:
https://bibliotekanauki.pl/articles/443007.pdf
Data publikacji:
2019-12-30
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu. Collegium Novum. Polskie Towarzystwo Neofilologiczne
Tematy:
interculturalism
intercultural encounters
intercultural dialogue
English as a foreign language
międzykulturowość
spotkania interkulturowe
dialog interkulturowy
język angielski jako obcy
Źródło:
Neofilolog; 2019, 53/2; 347-349
1429-2173
Pojawia się w:
Neofilolog
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Recenzja książki pod redakcją Johna Stewarta pt. Mosty zamiast murów. Podręcznik komunikacji interpersonalnej. Warszawa: Wydawnictwo Naukowe PWN, 2010, str. 616.
Autorzy:
Wysocka, Marzena S.
Powiązania:
https://bibliotekanauki.pl/articles/1037586.pdf
Data publikacji:
2019-09-24
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu. Collegium Novum. Polskie Towarzystwo Neofilologiczne
Źródło:
Neofilolog; 2012, 38/2; 263-269
1429-2173
Pojawia się w:
Neofilolog
Dostawca treści:
Biblioteka Nauki
Artykuł
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