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    Wyświetlanie 1-8 z 8
    Tytuł:
    Forest biomass for bioenergy: opportunities and constraints for good governance. A case study from Italy
    Autorzy:
    Maesano, M.
    Drigo, R.
    Lasserre, B.
    Chirici, G.
    Marchetti, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/52297.pdf
    Data publikacji:
    2014
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Technologii Drewna
    Tematy:
    forest biomass
    bioenergy
    biomass estimation
    climate change
    greenhouse gas
    governance
    WISDOM methodology
    Italy
    Opis:
    Interest in the use of biomass for energy has increased significantly in the last few years. The latest report by the Intergovernmental Panel on Climate Change highlights the influence mankind has had on the climate: an unprecedented increase in GHG levels in the last 800,000 years and a rise of 40% in CO2 concentrations since pre-industrial times. The challenge now is to find energy alternatives, and in this context, one important option is bioenergy, one of the most important energy sourcesof the future. In light of this, the goal of this paper was to assess the sustainable potential of woodfuel resources in Italy using WISDOM methodology. WISDOM, developed by the FAO, has been applied in many countries around the world. From this study, at national level, household consumption was at 19.3 Mt in 2003 (averagevalue), while the potential supply of woody biomass (productivity) was 24.9 Mt(average value), with a surplus of almost 6 million tons between household consumption and productivity. This study represents an advance in knowledge of the biomass potential for energy use in Italy, and, as such, is subject to possible future improvement. Forest bioenergy development creates good opportunities to mobilize the production potential of European forests, and to contribute to a more climate-friendly, bio-based economy.
    Źródło:
    Drewno. Prace Naukowe. Doniesienia. Komunikaty; 2014, 57, 192
    1644-3985
    Pojawia się w:
    Drewno. Prace Naukowe. Doniesienia. Komunikaty
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    SOLAP GIS in maritime research
    Autorzy:
    Drypczewski, K.
    Stepnowski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/332276.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Akustyczne
    Tematy:
    spatio-temporal GIS
    multidimensional data
    fish biomass estimation
    AIS
    tracking vessel movement
    Opis:
    Multidimensional Geographical Information System is a system especially designed to acquire, distribute, analyze and visualize complicated spatio-temporal data. Modern Geographical Information System technology can provide easy-to-use, near real-time solutions to many problems from different areas of research. In the article, authors summarize recent works on Spatial Online Analytical Processing (SOLAP) and multidimensional Geographical Information System (GIS), discuss its capabilities and data structures used in spatio-temporal datasets, and propose its possible applications in maritime research.
    Źródło:
    Hydroacoustics; 2016, 19; 93-100
    1642-1817
    Pojawia się w:
    Hydroacoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modelling of acoustic backscattering by southern Baltic herring
    Autorzy:
    Idczak, J.
    Gorska, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/331977.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Akustyczne
    Tematy:
    acoustic biomass estimation
    Baltic herring
    target strength
    modelling approach
    X-ray images
    Opis:
    Assessment of Baltic herring abundance can be carried out using acoustic techniques. Analysis of the relationship between the Baltic herring individual target strength, TS, and the total fish length, L, important for the acoustic assessment, showed the relationship to be dependent on the location of the study area. This finding motivated a detailed analysis of the relationship for the herring occurring in the southern Baltic ICES subdivisions 24, 25, and 26, in which Poland is responsible for the acoustic herring abundance assessment. The paper addresses the numerical analysis of the backscattering properties of the southern Baltic herring. The modelling approach used to study the backscattering was based on the Modal Series-Based Deformed Cylinder Model approximation. Details of the individual herring swimbladders were taken into account. Morphometric data necessary for the analysis was obtained from X-ray images of herring from the Polish coastal zone (ICES subdivision 26).
    Źródło:
    Hydroacoustics; 2016, 19; 145-152
    1642-1817
    Pojawia się w:
    Hydroacoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dokładność określania świeżej masy strzał jodły na podstawie przeliczników wagowo-objętościowych
    Accuracy of estimation silver fir stem mass on the basis of volume to weight conversion factors
    Autorzy:
    Ochal, W.
    Wertz, B.
    Grabczyński, S.
    Orzeł, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/985798.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    drzewa lesne
    jodla pospolita
    Abies alba
    biomasa drzewna
    masa strzaly drzew
    biomasa swieza
    szacowanie biomasy
    wspolczynniki wagowo-objetosciowe
    gestosc drewna
    abies alba
    wood density
    stem biomass
    biomass estimation
    Opis:
    The paper describes the accuracy of estimation of silver fir stem fresh mass on the basis of volume to weight conversion factor, derived from samples, collected from few different places along the stem. The research material contained 13 sample trees selected from homogenous 70−years old stand, situated in mountainous area of the Beskid Sądecki in Polish part of the Carpathians (S Poland). Volume over the bark of sample trees was calculated with section−wise method and the whole stem fresh biomass was directly weighted. For each sample tree three stem discs were collected at 1/6, 1/2 and 5/6 of tree height, their weight and volume were precisely determined and the biomass conversion factors (equivalent of stem density) were calculated. The assessment of the accuracy of whole fresh stem biomass was conducted according to five variants: for the biomass conversion factors derived from each individual stem disc (lower, middle or upper), from weighted mean density and on the basis of the constructed mixed model, where relative height and diameter were treated as fixed effects and influence of individual trees was included as a random term. The volume of sample fir stems ranged from 0.15 to 2.22 m3, while their fresh biomass varied between 138.1 and 1896.7 kg. Obtained results show that variation of the density was higher within stems than between them (coefficient of variation amounted to 8.4% i 3.3% respectively). The average density increased along stem, from 835.6 kg/m3 for lower part (1/6H) to 986.8 kg/m3 for the upper part (5/6H). Estimating the biomass on the basis of just lower stem disc resulted in the average relative error equal to –5.8%, while for middle stem disc the error was +1.2%, and for upper disc +11.3%. The use of conversion factors derived from weighted average density of all three stem discs resulted in average bias equal to –1,7% with standard error 1,0%. Despite the presence of mean bias of –2.3%, the constructed density model gave the most precise estimation of the stem biomass (standard error 0.7%), which indicates the reasons for its further improvements and usage.
    Źródło:
    Sylwan; 2018, 162, 04; 277-287
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Estimation of electricity production from biomass power plants for next three years
    Ocena produkcji energii elektrycznej z plantacji roślin energetycznych w okresie najbliższych trzech lat
    Autorzy:
    Bloch-Michalik, M.
    Gaworski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/56396.pdf
    Data publikacji:
    2015
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
    Tematy:
    estimation
    electricity production
    biomass
    power plant
    Opis:
    Biomass in Poland has the greatest technical potential of all domestic sources of renewable energy. Solid biomass from forestry, agriculture (energy crops and vegetable waste), food processing and biogas summary potential is estimate at 610 PJyear-1. Biomass in Poland has the best chance of development. The use of biomass as a fuel, especially in large combustion plants with a capacity of 50 MW, allows you to limit (in Poland, about 90 objects) of CO2 emissions in the national balance sheet. This is an important element of the CO2 reduction potential, while maintaining the desired level of electricity production.
    Produkcja biomasy w Polsce wyróżnia się największym potencjałem pod względem technicznym spośród krajowych źródeł energii odnawialnej. Biomasa pochodząca z leśnictwa, rolnictwa (roślin energetycznych i pozostałości po uprawie), przetwarzania żywności i produkcji biogazu stanowi potencjał energetyczny na poziomie około 610 PJ rocznie. Produkcja biomasy w Polsce wykazuje tendencje do systematycznego rozwoju. Przeprowadzone analizy wskazały, że wykorzystanie biomasy jako paliwa, szczególnie w dużych spalarniach masy roślinnej o mocy 50 MW, pozwala ograniczyć emisję CO2 w łącznym bilansie emisji w skali kraju. Jest to szczególnie istotne w kontekście oceny i perspektyw produkcji energii elektrycznej.
    Źródło:
    Annals of Warsaw University of Life Sciences - SGGW. Agriculture; 2015, 65 Agric.Forest Eng.
    0208-5712
    Pojawia się w:
    Annals of Warsaw University of Life Sciences - SGGW. Agriculture
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analiz pokazatelejj ehffektivnosti ispol'zovanija sel'skokhozjajjstvennojj biomassy v ehnergeticheskikh celjakh
    Analysis of efficiency indicators of agricultural biomass utilization for energy purposes
    Autorzy:
    Syrotjuk, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/78052.pdf
    Data publikacji:
    2015
    Wydawca:
    Komisja Motoryzacji i Energetyki Rolnictwa
    Tematy:
    agricultural biomass
    utilization
    estimation
    ecological approach
    economic efficiency indicator
    energy purpose
    Źródło:
    Motrol. Motoryzacja i Energetyka Rolnictwa; 2015, 17, 4
    1730-8658
    Pojawia się w:
    Motrol. Motoryzacja i Energetyka Rolnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Estimates and forecasts of forest biomass and carbon sequestration in North America and Australia: a forty-five year quest
    Autorzy:
    Botkin, D.B.
    Ngugi, M.R.
    Doley, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/52742.pdf
    Data publikacji:
    2014
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Technologii Drewna
    Tematy:
    estimation
    forecast
    forest biomass
    forest modelling
    forest inventory
    biomass inventory
    model validation
    carbon sequestration
    North America
    Australia
    Opis:
    A half-century of forest inventory research involving statistically-valid fieldmeasurements (using statistically representative sample size and showing confidence limits) and well-validated forecasting methods are reviewed in this paper. Some current procedures overestimate global and large-scale forest biomass, carbonstorage, and carbon sequestering rates because they are based on statistically-invalid methods (errors in estimates are unavailable and unreported), or they fail to consider key dynamic characteristics of forests. It is sometimes assumed that old-growth forests can serve as fixed, steady-state storage of biomass and carbon for indefinitely long periods, but it is shown by both modelling and remote sensing that forests are dynamic systems, the state of which can change considerably over as shorta time as a decade. Forecasting methods show that maximum biomass and carbon storage in some important forest types occurs in mid-succession, not in old-growth. It is proposed, therefore, that realistic biomass and carbon storage estimates used for carbon credits and offsets be determined as the statistical mean minus the confidence interval and that practical carbon sequestering programs include specific timeframes, not indefinitely long periods of time.
    Źródło:
    Drewno. Prace Naukowe. Doniesienia. Komunikaty; 2014, 57, 192
    1644-3985
    Pojawia się w:
    Drewno. Prace Naukowe. Doniesienia. Komunikaty
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Udział oraz dokładność szacowania pozostałości zrębowych w ogólnej masie pozyskanego drewna
    Share and accuracy of estimation of logging residues in the total volume of harvested timber
    Autorzy:
    Gendek, A.
    Wężyk, P.
    Moskalik, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/986464.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    pozyskiwanie drewna
    pozostalosci zrebowe
    miazszosc
    biomasa drzewna
    szacowanie biomasy
    timber harvesting
    forest biomass
    logging residues
    estimation
    Opis:
    Due to the observed impacts of climate change on the natural environment, the demand for energy from renewable sources is growing, especially in the last decades. One of the possibilities in this respect is the use of forest biomass, especially that one which comes from logging residues. This type of wood raw material is obtained primarily in mature forests and during late thinnings. Estimation of the expected volume of logging residues from a particular cutting site is currently carried out in the State Forests, National Forest Holding with an accuracy oscillating at an acceptable level of ±40%. The purpose of this study was to estimate the share of logging residues in the total volume of the harvested biomass and to determine the difference and error between the estimated volume to be sold and actually harvested. The research was carried out at the 164 logging sites located in 10 forest districts of north−eastern part of Poland. The average volume of logging residues was 37.7 ±14.4 m3/ha, and the average error of their estimation was –6.1%.
    Źródło:
    Sylwan; 2018, 162, 08; 679-687
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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