Autor: Silva, C. P. G. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Development and production of radioactive sources used for cancer treatment in Brazil
Autorzy:: Rostelato, M. E. C. M.
Rela, P. R.
Zeituni, C. A.
Feher, A.
Manzoli, J. E.
Moura, J. A.
Moura, E. S.
Silva, C. P. G.
Powiązania:: https://bibliotekanauki.pl/articles/148305.pdf
Data publikacji:: 2008
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: radioactive sources production
iodine-125 seeds
iridium-192 wires
brachytherapy
cancer treatment
Opis:: The number of cancer patients in Brazil is increasing and part of the patients are submitted to brachytherapy treatment using iridium-192 wire and iodine-125 radioactive seeds. The Nuclear Energy Research Institute established a programme to produce iridium-192 wire and iodine-125 radioactive seeds. With the purpose of settling a laboratory for iridium-192 sources production, a wire activation method was developed and a hot cell for the wire manipulation, quality assurance and packaging was built. The iodine-125 seeds consist of a welded titanium capsule containing iodine-125 adsorbed onto a silver rod. Concerning the setup of the local production, the following activities were carried out: superficial treatment of the silver rod, development of a process to absorb the iodine in the silver rod, welding methodology to seal the seeds, leakage and contamination test and source activity measurement.
Źródło:: Nukleonika; 2008, 53, suppl. 2; 99-103
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Spatial analysis of vegetal cover and sediment yield in Tapacura river catchment based on remote sensing and GIS
Analiza przestrzenna ilosci sedymentu oraz pokrywy roslinnej w zlewni rzeki Tapacura okreslona na podstawie zdalnych obserwacji oraz analizy GIS
Autorzy:: Silva, R M
Santos, C.A.G.
Gico Lima Montenegro, S.M.
Silva, L.P.
Powiązania:: https://bibliotekanauki.pl/articles/81843.pdf
Data publikacji:: 2010
Wydawca:: Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:: spatial analysis
vegetation cover
sediment yield
Tapacura River
catchment
remote sensing
GIS analysis
Opis:: Mapping and assessment of erosion risk is an important tool for planning of natural resources management, allowing researchers to propose modifi cation in land-use properly and implement more sustainable management strategies in the long-term. The Tapacurá river catchment, located in Pernambuco State, Northeastern Brazil, is one of the planning units for management of water resources of Recife Metropilitan Region (RMR), and it is divided into 12 sub-basins. The objective of this study is to evaluate the spatial variability of vegetal cover and sediment yield in this basin through remote sensing and GIS techniques. Maps of the erosivity (R), erodibility (K), topographic (LS), cover-management (C) and support practice (P) factors were derived from the digital elevation model (DEM), climate database, and soil and NDVI maps, taking into account information available in the literature. In order to validate the simulation process, Sediment Delivery Ratio (SDR) was estimated. The obtained NDVI map showed vegetation loss during the analyzed period, indicating a distinct contrast between loss and gains of vegetation index. The vegetation and sediment yield mapping showed to be a useful tool for environmental monitoring and management, which can provide satisfactory results when jointly used. The results suggest a mean SDR around 0.9 and estimate the sediment yield as 23.98 ton/ha/month.
Analiza przestrzenna ilości sedymentu oraz pokrywy roślinnej w zlewni rzeki Tapacura określona na podstawie zdalnych obserwacji oraz analizy GIS. Artykuł przedstawia sposób wykorzystania zebranych w terenie danych dotyczących pokrywy roślinnej oraz ilości sedymentu określonego za pomocą zdalnych obserwacji oraz analizy GIS w celu monitorowania środowiska i zarządzania zlewniami. W pracy wykorzystano metodę USLE-SDR, a także cyfrowy model terenu. Badania prowadzono w zlewni rzeki Tapacura w północno-wschodniej Brazylii. Wyniki sugerują przyjęcie wartości parametru SDR = 0,9, a oszacowana wielkość transportu rumowiska wynosi 23,98 t/ha/miesiąc.
Źródło:: Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation; 2010, 42, 1; 5-16
0208-5771
Pojawia się w:: Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Alternative study for the Nautical and Shore Protection Structures in the Estuary of Santos, Brazil
Autorzy:: Alfredini, P.
Arasaki, E.
Bernardino, J.C.M
Da Silva, G.
Powiązania:: https://bibliotekanauki.pl/articles/116371.pdf
Data publikacji:: 2018
Wydawca:: Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:: nautical protection structures
shore protection
estuary ofsantos
Port of Santos
Santos Port Outer Access Channel
offshore bar
hydraulic laboratory
shoreline protection issues
Opis:: For the enlargement of the nautical dimensions of Santos Port Outer Access Channel (Brazil), training walls crossing the Offshore Bar are needed. The training walls choice to reduce dredging rates also induces to consider a coupling planning between nautical purposes and shore protection measures, as Santos Municipality have serious erosion problems nowadays due to the urban growth in the backshore and sea level rise. For decision support, the Hydraulic Laboratory of Engineering School of University of Sao Paulo was commissioned to study in a composite mathematical and scale model. Results include changes in wave height and direction and current speed analysis to conditions with training walls and segmented breakwaters. The water renewal was also analyzed to the condition with segmented breakwater and compared to current situation, based on hydrodynamics results and considering that this structure can reduce water quality in this area.
Źródło:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2018, 12, 2; 375-380
2083-6473
2083-6481
Pojawia się w:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Thermal performance of Rice Husk Ash mixed mortar in concrete and masonry buildings
Właściwości termiczne mieszanki zaprawy ryżowo-łupkowej w budownictwie betonowym i murarskim
Autorzy:: Selvaranjan, Kajanan
Gamage, J.C.P.H.
De, Silva G.I.P.
Attanayaka, Vajira
Powiązania:: https://bibliotekanauki.pl/articles/391011.pdf
Data publikacji:: 2020
Wydawca:: Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
Tematy:: thermal conductivity
mortar
mechanical properties
SEM
Rice Husk Ash
przewodność cieplna
zaprawa murarska
właściwości mechaniczne
popiół łuskowy ryżowy
Opis:: Rice Husk (RH) is an agricultural waste which is produced in huge amounts from the milling process of paddy rice. Rice Husk Ash (RHA) is a by-product material obtained from the combustion of rice husk. The amorphous silica-rich RHA (84-90 wt%) has a wide range of applications. This research focused on the possibility of utilizing RHA in the process of developing a mortar with low thermal conductivity to enhance the thermal comfort in concrete and masonry buildings. The thermal conductivity of mortar was determined by Lee’s Disc method, and the results were compared to the data for conventional mortar as well as commercial thermal insulation materials. The results indicate a significant reduction in thermal conductivity in the mortar developed with RHA
Łuska ryżowa (Rice Husk, RH) jest odpadem rolniczym, który jest produkowany w ogromnych ilościach w procesie mielenia ryżu niełuskanego. Popiół z łuski ryżowej (Ryż Husk Ash – RHA) jest produktem ubocznym uzyskiwanym w procesie spalania łuski ryżowej. Bogaty w krzemionkę amorficzną RHA (84-90 % mas.) ma wiele zastosowań. Badania te skupiały się na możliwości wykorzystania RHA w procesie opracowywania zaprawy o niskiej przewodności cieplnej w celu zwiększenia komfortu cieplnego w budownictwie betonowym i murowym. Przewodność cieplną zaprawy określono metodą Lee's Disc, a wyniki porównano z danymi dla zaprawy konwencjonalnej oraz handlowych materiałów termoizolacyjnych. Wyniki wskazują na znaczne obniżenie przewodności cieplnej w zaprawie opracowanej przy użyciu RHA.
Źródło:: Budownictwo i Architektura; 2020, 19, 4; 43-52
1899-0665
Pojawia się w:: Budownictwo i Architektura
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: First record of mites associated with lima bean (Phaseolus lunatus L.)
Autorzy:: Neto, A.V.G.
Silva, P.R.R.
Silva, J.D.C.
Dos Santos, M.F.
Da Silva Melo, J.W.
De Franca, S.M.
Powiązania:: https://bibliotekanauki.pl/articles/2084632.pdf
Data publikacji:: 2019
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Tetranychidae
pest mites
legumes
Opis:: Pest mites of the family Tetranychidae are commonly reported in several legumes. However, reports of their occurrence in lima beans are insipient, especially in Brazil. The objective of this research was to record the occurrence of mites in lima bean plants and to describe their damage in this Fabaceae. Tetranychus neocaledonicus André and Mononychellus planki McGregor were found in lima bean plants, Phaseolus lunatus (Fabaceae or Leguminosae). The lima bean plants, when infested by these mites, initially exhibit small whitish spots in the leaflets, which with increasing population density rapidly evolve into chlorotic patches, followed by silvering, and may dry out and fall due to their overfeeding. The extent of the damage caused to lima bean plants and the adaptability of the mite to warm and dry conditions indicate that T. neocaledonicus has greater potential as a lima bean pest than M. planki in northeastern Brazil. This is the first record of these mites associated with P. lunatus.
Źródło:: Journal of Plant Protection Research; 2019, 59, 3; 418-422
1427-4345
Pojawia się w:: Journal of Plant Protection Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Sensorless Control of Surface Mounted Permanent Magnet Synchronous Motors Using Matrix Converters
Autorzy:: Saltiveri, D.
Arias, A.
Asher, G.
Sumner, M.
Wheeler, P.
Empringham, L.
Silva, C.
Powiązania:: https://bibliotekanauki.pl/articles/262580.pdf
Data publikacji:: 2006
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Tematy:: sensorless control
permanent magnet synchronous motor
matrix converters
Opis:: This paper investigates the influence of the power converter on the performance of Surface Mounted Permanent Magnet Synchronous Motor drives, which employ High Frequency voltage injection to achieve low and zero speed control. Experimental results demonstrate the remarkable performance of the sensor less speed and position control employing the Matrix Converter and the contributions of the Space Modulation Profiling technique. The Matrix Converter has almost zero dead time, which means that behaves almost like an ideal power converter and achieves better results than the conventional Voltage Source Inverter. A comparison of the sensor less technique proposed using both converters is made.
Źródło:: Electrical Power Quality and Utilisation. Journal; 2006, 12, 1; 59-67
1896-4672
Pojawia się w:: Electrical Power Quality and Utilisation. Journal
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Radiation processing of detergents and possible environmental benefits
Autorzy:: Borrely, S. I.
Romanelli, M. F.
Pereira, M. C. C.
da Silva, G. P.
Mesquita, L. C. A.
de Moraes, M. C. F.
Powiązania:: https://bibliotekanauki.pl/articles/148020.pdf
Data publikacji:: 2009
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: EB irradiadion
anionic surfactants
effluent
Vibrio fischeri
Daphnia similis
Opis:: Detergents at waters inducing negative changes for biological degradability and water general quality. Some authors have evidenced a considerable amount of anionic surfactant and toxic effects into natural water and effluents related to detergents. The objective of the study was to apply electron irradiation for reducing toxicity, and for degradation of surfactants. To quantify surfactant LAS determination as MBAS (metylene blue active substances) was applied. The capacity of radiation to reduce surfactants was evidenced for real effluent and for water solution containing sodium dodecyl sulfate, linear alkylbenzene sulfonate (LAS), separately. An electron beam accelerator (EBA) 1.5 MeV was the radiation source. Anionic surfactant solutions as well as real effluents resulted in less toxic samples after irradiation. Toxicity was evaluated for Vibrio fischeri and Daphnia similis. An important decline of total anionic surfactant was observed after irradiation to doses: 6.0 kGy and 20 kGy (surfactant in water solutions and effluents, respectively). To conclude, EBA irradiations accounted for 88% to 96% less toxic surfactants solutions and effluents and 68% to 96% for MBAS compounds decomposition.
Źródło:: Nukleonika; 2009, 54, 2; 61-64
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Selectivity of diphenyl-ether herbicide with postemergence applications in chickpea
Autorzy:: Silva, L.G.B.
Da Silva Araujo, L.
Goncalves, D.J.
Souza Valente, M.
Da Silva, A.R.
Nascimento, W.M.
Ribeiro da Cunha, P.C.
Powiązania:: https://bibliotekanauki.pl/articles/2084719.pdf
Data publikacji:: 2019
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Cicer arietinum
diphenyl-ether herbicides
weeds
Opis:: There are few reports in literature about the selectivity of postemergence application of herbicides for the control of eudicotyledon weeds (broadleaf) in chickpea. For this reason, the aim of this study was to investigate the selectivity of diphenyl-ether herbicides in chickpea influenced by the herbicides and application rates. A field experiment was conducted from February to June 2017 in Urutaí, state of Goiás, Brazil. Cultivar BRS Aleppo was used in the experiment. The experiment was set up in a randomized block design with 2 × 3 + 1 factorial arrangement and three replications. The first factor was herbicides (fomesafen and lactofen) with the second factor being herbicide rate (50, 75, and 100% of referenced rate) plus an untreated check as a comparison. The applied rates of herbicides were 250 and 180 g ⋅ ha–1 of fomesafen and lactofen, respectively. The selectivity of herbicides was evaluated according to agronomic characteristics (plant population, height, dry matter, number of pods per plant and 100-grain weight) and yields. Both herbicides, regardless of dosage, were selective in chickpea cultivation, even exhibiting leaf necrosis symptoms with visible injuries below 20% with no effect on yield.
Źródło:: Journal of Plant Protection Research; 2019, 59, 3; 350-354
1427-4345
Pojawia się w:: Journal of Plant Protection Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Calculation of grounding grids parameter at arbitrary geometry
Autorzy:: Silva, C. L. B.
Pires, T. G.
Calixto, W. P.
Oliveira, D. N.
Souza, L. A. P.
Filho, A. M. S.
Powiązania:: https://bibliotekanauki.pl/articles/136173.pdf
Data publikacji:: 2017
Wydawca:: EEEIC International Barbara Leonowicz Szabłowska
Tematy:: grounding grids parameters
Heppe
soil stratified in two layers
Opis:: This paper deals with the computation of ground resistance, surface voltage, touch voltage and step voltage, to mesh with horizontal wires arranged in different angles. The computer program implemented used in the mathematical modeling is based on the method proposed by Heppe, which allows obtaining the grounding parameters for homogeneous soil and soil stratified in two layers. The results obtained with the proposed method will be compared with other methods in literature. Also will be presented the results of a grounding grid using wires at various angles.
Źródło:: Transactions on Environment and Electrical Engineering; 2017, 2, 2; 11-17
2450-5730
Pojawia się w:: Transactions on Environment and Electrical Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Geoelectric method applied in correlation between physical characteristics and electrical properties of the soil
Autorzy:: Filho, A. M. S.
Silva, C. L. B.
Oliveira, M. A. A.
Pires, T. G.
Alves, A. J.
Calixto, W. P.
Narciso, M. G.
Powiązania:: https://bibliotekanauki.pl/articles/136150.pdf
Data publikacji:: 2017
Wydawca:: EEEIC International Barbara Leonowicz Szabłowska
Tematy:: geoelectrical prospecting
apparent
electrical resistivity
soil compaction
moisture content
Opis:: This paper presents the study of the relationship between electrical properties and physical characteristics of the soil. Measures of apparent electrical resistivity of the soil were made for different types of soil, varying moisture content gradually while maintaining a constant compaction, and then varying the compaction and relating it to a constant humidity. Development of a correlation surface is proposed in order to identify granulometry of the soil from moisture and compaction measurements. For the study of spatial variability, two areas were chosen to allow the change of moisture content and compaction in order to verify the measurement capacity of apparent electrical resistivity of the soil as methodology to identify change in soil dynamics. Results obtained show correlations among apparent electrical resistivity of the soil, moisture, soil compaction and clay content.
Źródło:: Transactions on Environment and Electrical Engineering; 2017, 2, 2; 37-44
2450-5730
Pojawia się w:: Transactions on Environment and Electrical Engineering
Dostawca treści:: Biblioteka Nauki

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