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Tytuł:
The Effect of a Physical Activity Program on Decreasing Physical Disability Indicated by Musculoskeletal Pain and Related Symptoms Among Workers: A Pilot Study
Autorzy:
Moreira-Silva, I.
Santos, R.
Abreu, S.
Mota, J.
Powiązania:
https://bibliotekanauki.pl/articles/90298.pdf
Data publikacji:
2014
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
physical activity
musculoskeletal pain
workers
intervention study
choroby narządów ruchu
pracownik
aktywność psycho-ruchowa
aktywność fizyczna
program aktywności fizycznej
Opis:
The aim of this study was to verify the effect of a physical activity (PA) program on musculoskeletal pain and related symptoms in different body regions among workers. Methods. The intervention study lasted 6 months. The training sessions were given during work time. The intervention group (TOI) (n = 39) participated in 10–15 min of physical exercise training 3 times a week and focused on stretching exercises and general strength. The reference group (TOR) (n = 31) were asked to continue their daily activities. Musculoskeletal pain was assessed with the standardized Nordic questionnaires for analyzing musculoskeletal symptoms. Evaluations were performed at baseline and at the end of the intervention. Results. After the intervention, the TOI obtained some significant results regarding a decrease in the intensity of pain in some of the body regions evaluated, such as elbow (p = .03) and dorsal region (p = .015). In comparing the TOR and TOI after the 6 months of the PA program, we can verify that in the elbow and in the thigh/hip regions, the pain intensity decreased significantly; additionally, there is some evidence to suggest statistically significant results in the neck region (p = .063). Conclusion. Our intervention seems to have reduced musculoskeletal pain and related symptoms in factory workers.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2014, 20, 1; 55-64
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dynamics of Polariton Emission in the Linear Regime
Autorzy:
Kłopotowski, Ł.
Santos, R.
Amo, A.
Martín, M. D.
Viña, L.
André, R.
Powiązania:
https://bibliotekanauki.pl/articles/2038373.pdf
Data publikacji:
2004-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.36.+c
71.55.Gs
78.47.+p
Opis:
We studied the dependence of polariton emission dynamics on polariton wave-vector and exciton-photon energy detuning. To reproduce the experimental data, we applied a model that obtains the photonic and the excitonic emission rates of the polariton.
Źródło:
Acta Physica Polonica A; 2004, 106, 3; 443-450
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The oldest Brazilian snakes from the Cenomanian (early Late Cretaceous)
Autorzy:
Hsiou, A.S.
Albino, A.M.
Medeiros, M.A.
Santos, R.A.B.
Powiązania:
https://bibliotekanauki.pl/articles/945877.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
paleontology
Reptilia
Squamata
Ophidia
snake
Cenomanian
Late Cretaceous
Cretaceous
Brazil
Opis:
South American Mesozoic snake diversity is mostly represented by genera from the Cenomanian (Najash), Santonian–Campanian (Dinilysia), and Campanian–Maastrichtian (Alamitophis, Patagoniophis, Rionegrophis, and Australophis) of Patagonia, Argentina. In this paper, we describe a new snake genus and species, Seismophis septentrionalis, from the Cenomanian (early Late Cretaceous) of the Alcântara Formation, Maranhão, northeastern Brazil. The new snake comprises a posteriormost trunk vertebra and possibly a poorly preserved midtrunk vertebra. Both vertebrae share small size, zygosphene moderately thick with a rectilinear roof, absence of paracotylar foramina, presence of parazygantral foramina, and strongly marked parasagittal ridges of the neural arch. The new snake is here considered of uncertain systematic affinities, but probably close to the limbed snake Najash rionegrina. Although the material is very fragmentary and the systematic assignment is still unresolved, this snake represents the oldest, as well as probably the most primitive snake from Brazil.
Źródło:
Acta Palaeontologica Polonica; 2014, 59, 3; 635-642
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Eddy Current System for Complex Geometry Inspection in High Speed Application
System wiroprądowy do kompleksowej kontroli geometrii w zastosowaniach z dużą prędkością
Autorzy:
Camerini, C.
Rebello, J. M. A.
Braga, L.
Santos, R.
Santos, J. M.
Pereira, G.
Powiązania:
https://bibliotekanauki.pl/articles/107878.pdf
Data publikacji:
2018
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
fatigue crack
weld root
eddy current testing
in-line inspection tool
pęknięcie zmęczeniowe
rdzeń spawu
testowanie wiroprądowe
jednostka kontroli inline
Opis:
Rigid pipelines installed in offshore structures for oil and gas production are built from pipe sections connected by circumferential welds. Such welds are generally points of stress concentration and therefore the regions that most demand periodic inspection. The weld geometry and the inspection speed required for in service inspection are the main challenges associated to the inspection procedure. In the present work an eddy current transducer with sensing coils placed orthogonally and connected in differential mode was introduced to evaluate fatigue cracks in weld root. A dedicated embedded electronic hardware was developed to drive the transducer and measure the electrical complex impedance of the coils and was specifically designed for operation under autonomous in-line inspection tool in a speed range between 0.5 – 1.0 m/s. The achieved results have confirmed that the introduced eddy current transducer is a potential solution for fatigue crack detection in irregular surfaces like weld root, while the hardware developed presented a reasonable SNR and achieved the data rate required to be incorporated in an autonomous in-line inspection tool.
Sztywne rurociągi instalowane w morskich konstrukcjach do produkcji ropy i gazu budowane są z odcinków rur połączonych spoinami obwodowymi. Takie spoiny są zwykle punktami koncentracji naprężeń, a zatem regionami, które w największym stopniu wymagają okresowej kontroli. Geometria spoiny i prędkość kontroli wymagana do przeprowadzenia badania serwisowego stanowią główne wyzwania związane z procedurą inspekcji. W niniejszej pracy, w celu oceny pęknięć zmęczeniowych w rdzeniu spoiny, zaproponowano przetwornik wiroprądowy z cewkami pomiarowymi umieszczonymi ortogonalnie i połączonymi różnicowo. Opracowano specjalny wbudowany system elektroniczny do sterowania przetwornikiem i pomiaru impedancji złożonych cewek elektrycznych. System został zaprojektowany specjalnie do pracy jako autonomiczna jednostka inspekcji linii w zakresie prędkości od 0,5 do 1,0 m/s. Uzyskane wyniki potwierdziły, że wprowadzony przetwornik wiroprądowy jest potencjalnym rozwiązaniem umożliwiającym wykrywania pęknięć zmęczeniowych na nieregularnych powierzchniach, takich jak rdzeń spoiny. Ponadto opracowany sprzęt zapewnia odpowiedni współczynnik stosunku sygnału do szumu SNR i osiąga prędkość transmisji wymaganą dla zastosowania w jednostkach niezależnej kontroli w linii.
Źródło:
Badania Nieniszczące i Diagnostyka; 2018, 2; 6-10
2451-4462
2543-7755
Pojawia się w:
Badania Nieniszczące i Diagnostyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Do combinations of insecticides and acaricides influence spray droplet formation and the interaction with citrus leaves?
Autorzy:
Della Vechia, J.F.
Santos, R.T.
Griesang, F.
Santos, C.M.
Ferriera, M.C.
Andrade, D.J.
Powiązania:
https://bibliotekanauki.pl/articles/2084816.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
contact angle
coverage efficiency
droplet size
surface tension
tank mixture
Opis:
In agriculture, the mixing of pesticides in tanks is a common practice. However, it is necessary to previse possible physical-chemical implications of this practice, which may affect the efficiency of the treatments performed. Therefore, the objective of this study was to evaluate the effects of the addition of acaricide to insecticidal spray mixtures on the formation of spray droplets and the interaction with citrus leaves. The experimental design was totally randomized, in a (2 × 3 + 1) factorial scheme for seven treatments. Factor A corresponded to the spray mixture used (isolate or in the mixture). Factor B corresponded to the insecticides tested (lambda-cyhalothrin + thiamethoxam, phosmet, and imidacloprid) and the control consisted of a spray mixture with spirodiclofen only. Nine replications were performed for characterization of the spray droplet size spectrum and four replications for the analysis of the surface tension and the contact angle. The mixture of pesticides showed positive results in terms of application safety. The addition of acaricide to insecticide spray mixtures reduced the surface tension and contact angle of droplets on the adaxial surface of orange leaves. There was an increment in volume median diameter (VMD), a significant reduction in the volume of droplets with drift-sensitive size and improvement in the uniformity of droplet size. Therefore, the addition of acaricide to an insecticide spray mixture positively influenced spray droplet formation and the interaction with citrus leaves providing better coverage and droplet size fractions with an appropriate size for safe and efficient application.
Źródło:
Journal of Plant Protection Research; 2019, 59, 4; 487-493
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A comparative study on the performance of radiation detectors from the HgI2 crystals grown by different techniques
Autorzy:
Martins, J. F. T.
Costa, F. E.
dos Santos, R. A.
de Mesquita, C. H.
Hamada, M. M.
Powiązania:
https://bibliotekanauki.pl/articles/146916.pdf
Data publikacji:
2012
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
crystal growth
iodide mercury crystal
physical vapor transport (PVT)
radiation detector
semiconductor crystal
Opis:
In this work, the establishment of a technology for HgI2 purification and crystal growth is described, aiming at a future application of this crystal as a room temperature radiation semiconductor detector. Two methods of crystal growth were studied in the development of this work: (1) physical vapor transport (PVT) and (2) saturated solution from dimethylsulphoxide (DMSO) complexes. In order to evaluate the crystals obtained using each of these methods, systematic measurements were carried out for determining the stoichiometry, structure, orientation, surface morphology and impurity of the crystal. The influence of these physicochemical properties of the crystals developed was evaluated in terms of their performance as a radiation detector. The best response to radiation was found for the crystals grown by the PVT technique. Significant improvement in the performance of HgI2 radiation detector was found, purifying the crystal by means of two successive growths by the PVT technique.
Źródło:
Nukleonika; 2012, 57, 4; 555-562
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Estimating forest biomass by remote sensing RADAR data in Brazil
Autorzy:
Santos, J.R.
Gama, F.F.
da Conceicao Bispo, P.
Powiązania:
https://bibliotekanauki.pl/articles/52438.pdf
Data publikacji:
2014
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Technologii Drewna
Tematy:
forest biomass
biomass modelling
forest inventory
tropical forest
remote sensing
eucalyptus tree
stand
RADAR data
Brazil
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:
Improved single-stage OTAs using differential-folded voltage combiners
Autorzy:
Santos-Tavares, R
Santin, E
Borrego, R
Oliveira, J
Goes, J.
Powiązania:
https://bibliotekanauki.pl/articles/397711.pdf
Data publikacji:
2013
Wydawca:
Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
Tematy:
voltage-combiners
single-stage
OTA
common-drain
common-source
DTMOS
łącznik napięciowy
wspólny dren
wspólne źródło
Opis:
A new technique to enhance single-stage operational transconductance amplifiers (OTAs) is presented. Enhanced DC gain and reduced input parasitic capacitances are achieved by employing two input fully-differential voltage combiners, i.e. a combination of transistors in common-drain and common-source configurations operating as a preamplifier stage. Simulation results show that the input capacitance can be as small as 195 fF (corresponding to a 46 % reduction) while achieving a GBW of 1982 MHZ (@ CL = 1 pF) with a PM of about 60⁰. The complete amplifier dissipates only 1.78 mW corresponding to a figure-of-merit (FoM) of 1115 MHz-pF/mW.
Źródło:
International Journal of Microelectronics and Computer Science; 2013, 4, 4; 175-179
2080-8755
2353-9607
Pojawia się w:
International Journal of Microelectronics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Monitoring wylesień lasów deszczowych Amazonii na podstawie radiometrycznych przetworzeń zdjęć satelitarnych
The monitoring of the Amazon rainforest deforestation on the basis of a radiometric analysis of satellite images
Autorzy:
Ugarte, H.F.
Zawiła-Niedźwiecki, T.
Dos Santos, J.R.
Maldonado, F.D.
Powiązania:
https://bibliotekanauki.pl/articles/1012565.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
zdjecia satelitarne
satelita CBERS-2
satelita Landsat ETM plus
Amazonia
teledetekcja satelitarna
lesnictwo tropikalne
monitoring
wylesienia
lasy tropikalne
satellite remote sensing
tropical forest
deforestation
bolivia
the amazon
Opis:
The article discusses the results of research on radiometric processing of multitemporal satellite images in order to monitor deforestation in the Amazon region. Images acquired by Landsat ETM+ and CBERS−2 were used. The proposed algorithms enabled an objective analysis of deforestation and regeneration distribution within tropical rainforests. The advantage of the method is its simple algorithm and lack of need for atmospheric correction.
Źródło:
Sylwan; 2008, 152, 07; 3-8
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Three-dimensional kinematic adaptations of gait throughout pregnancy and post-partum
Autorzy:
Branco, M. A. C.
Santos-Rocha, R.
Vieira, F.
Aguiar, R.
Veloso, A. P.
Powiązania:
https://bibliotekanauki.pl/articles/307113.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
ciąża
biomechanika
kinematyka
własności temporalne
chód
pregnancy
biomechanics
joint kinematics
temporal parameters
gait
Opis:
Purpose: The kinematic analysis of gait during pregnancy provides more information about the anatomical changes and contributes to exercise and rehabilitation prescription. The purposes were to describe and quantify the spatial, temporal and kinematic parameters in the joints of the lower limb during gait at the end of the first, second and third trimesters of pregnancy and in the postpartum period. Methods: A three-dimensional analysis was performed in eleven pregnant women. Repeated measures ANOVA was performed for comparisons between periods. Results: The longitudinal effect of pregnancy was not observed in spatial and temporal parameters. In joint kinematics the effect of pregnancy was observed in all joints for the three planes of motion. The hip joint and pelvis are the structures with more changes, and the results point to an increase in the anterior tilt of the pelvis as the pregnancy progresses, as well as a decrease of the amplitudes of the hip joint. The results suggested that pregnant women need to maintain the stability of the body, and become more efficient in locomotion. Conclusions: In general, the results retrieve the values from the beginning of pregnancy, indicating that the body was self-organized in order to overcome the morphological and physiological changes which women suffer during pregnancy, indicating that they have the ability to adapt depending on the demands, and after the effect of pregnancy is over, they return to values similar to those found in early pregnancy
Źródło:
Acta of Bioengineering and Biomechanics; 2016, 18, 2; 153-162
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The potential and pitfalls of exploiting nitrogen fixing bacteria in agricultural soils as a substitute for inorganic fertiliser
Autorzy:
Cummings, S. P.
Humphry, D. R.
Santos, S. R.
Andrews, M.
James, E. K.
Powiązania:
https://bibliotekanauki.pl/articles/363190.pdf
Data publikacji:
2006
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:
szczepionka
żyzność gleby
rolnictwo
taksonomia
Rhizobium
Rhizobial inoculants
soil fertility
agriculture
taxonomy
rhizobia
Opis:
Nitrogen fixing bacteria have been used for centuries to improve the fertility of agricultural soils. Since the introduction of inorganic nitrogen (N) fertiliser that provides a reliable boost to crop yields whilst reducing land and labour requirements, the use of biological nitrogen fixation has been in decline. Recently, concerns have been expressed about the sustainability of inorganic N fertiliser application, however, there remain doubts about whether N2 fixing bacteria alone can provide agriculture with sufficient fixed N to feed a burgeoning global population. In this paper we review the current state of our knowledge regarding those diazotrophic bacteria that have a role to play in agriculture. We focus on our current areas of research, particularly, the importance of understanding the classification and mechanism of action of N2 fixing bacteria that are used in agricultural soils. We discuss the applications of N2 fixing bacteria that illustrate their potential to provide sustainable N, particularly focussing on Australian and South American agricultural systems where these bacteria are widely exploited to maintain soil fertility. We also identify problems with the use of bacteria as inoculants, including ineffective inoculation due to poor quality preparation, the use of appropriate isolates and issues with sustainability. We review the outlook for biological N fixation highlighting how molecular biology may enable the expression of N fixation in non-leguminous crops.
Źródło:
Environmental Biotechnology; 2006, 2, 1; 1-10
1734-4964
Pojawia się w:
Environmental Biotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Teledetekcja satelitarna w monitorowaniu lasów tropikalnych
Satellite remote sensing in monitoring of tropical forests
Autorzy:
Zawiła-Niedźwiecki, T.
Koranteng, A.
Ugarte, H. F.
dos Santos, J. R.
Maldonado, F. D.
Powiązania:
https://bibliotekanauki.pl/articles/132247.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Geograficzne
Tematy:
las tropikalny
degradacja
teledetekcja satelitarna
monitorowanie
tropical forest
degradation
satellite remote sensing
monitoring
Źródło:
Teledetekcja Środowiska; 2008, 39; 41-47
1644-6380
Pojawia się w:
Teledetekcja Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Serological and molecular evidence of hepadnavirus infection in swine
Autorzy:
Vieira, Y.R.
Silva, M.F.M.
Santos, D.R.L.
Vieira, A.A.
Ciacci-Zanella, J.R.
Barquero, G.
do Lago, B.V.
Gomes, S.A.
Pinto, M.A.
de Paula, V.S.
Powiązania:
https://bibliotekanauki.pl/articles/989989.pdf
Data publikacji:
2015
Wydawca:
Instytut Medycyny Wsi
Tematy:
diagnostic
hepadnavirus
swine
Opis:
Introduction and objective. Recently, investigations in a swine herd identified evidence of the existence of a novel member of the Hepadnavirus family endemic in swine. The aim of this study was to investigate the serological and molecular markers of Hepadnavirus circulation in Brazilian domestic swine and wild boar herds, and to evaluate the identity with HBV and other Hepadnaviruses reported previously. Materials and methods. For the study, 376 swine were screened for hepatitis B virus serological markers. Analyses were performed in serum samples using commercial enzyme-linked immunosorbent assay (ELISA) kits (DiaSorin®) for anti-HBc, HBsAg and anti-HBs. Reactive and undetermined swine serum samples were selected to perform DNA viral extraction (QIAamp DNA Mini Kit, Qiagen®), partial genome amplification and genome sequencing. Results. From 376 swine samples analysed, 28 (7.45%) were reactive to anti-HBc, 3 (0.80%) to HBsAg and 6 (1.6%) to anti-HBs. Besides, more 17 (4.52%) swine samples analyzed were classified in the grey zone of the EIA test to anti-HBc and 2 (0.53%) to HBsAg. From 49 samples molecularly analyzed after serological trial, 4 samples showed a positive result for the qualitative PCR for Hepadnavirus. Phylogenetic reconstruction using partial genome sequencing (360 bp) of 3 samples showed similarity with HBV with 90.8–96.3% of identity. Conclusions. Serological and molecular data showed evidence of the circulation of a virus similar to hepatitis B virus in swine.
Źródło:
Annals of Agricultural and Environmental Medicine; 2015, 22, 1
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Peanut allergy as a tigger for the deterioration of atopic dermatitis and precursor of staphylococcal and herpetic associated infections - case report
Autorzy:
de Carvalho Ferreira, D.
Abad, E.D.
Cavalcante, F.S.
dos Santos, F.M.
Saintive, S.
Goudoris, E.
do Prado, E.A.
Ribeiro, M.
Rosado, A.S.
van Elsas, J.D.
dos Santos, K.R.N.
Powiązania:
https://bibliotekanauki.pl/articles/51908.pdf
Data publikacji:
2015
Wydawca:
Instytut Medycyny Wsi
Źródło:
Annals of Agricultural and Environmental Medicine; 2015, 22, 3
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Potential risk of remaining PCBs and management strategies in Europe
Autorzy:
Kikuchi, R.
Santos, S. M.
Gerardo, R.
Powiązania:
https://bibliotekanauki.pl/articles/363126.pdf
Data publikacji:
2006
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:
opłacalność
Europa
Konwencja Helsińska
PCB
cost effectiveness
Europe
Helsinki Convention
PCB risk
treatment
Opis:
Polychlorinated biphenyls (PCBs) are persistent hazardous chemicals and are now out of production worldwide. Although over 20 years have passed since the Helsinki Convention promoted the elimination of PCB use, it is difficult to put an end to PCB emissions in a short time because PCBs have a long lifetime in the environment and a major portion of PCBs are emitted from electrical equipment manufactured before the Helsinki Convention but still used today. PCBs have an impact on human sperm integrity in the European male population; furthermore, Arctic ecosystems such as those supporting polar bears and seals are exposed to risks due to the long-distance transport of PCBs. Most European countries have no proper facilities for PCB treatment. After analyzing extensive information about PCB treatments, it is concluded that the thermal process is technically sound and cost-effective. This study contributes to the promotion of treatments in most European countries storing PCBs with the aim of pursuing a sustainable future.
Źródło:
Environmental Biotechnology; 2006, 2, 2; 69-77
1734-4964
Pojawia się w:
Environmental Biotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
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