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Wyświetlanie 1-15 z 2470
Tytuł:
$MoO_{x}$ Doped Single-Walled Carbon Nanotube Films as Hole Transport Layer for Organic Solar Cells
Autorzy:
Çolak, F.
Dalkılıç, Z.
Tabatabaei, A.
Atlıbatur, R.
Çolak, Ü.
Arıc, E.
Karatepe, N.
Powiązania:
https://bibliotekanauki.pl/articles/1398324.pdf
Data publikacji:
2017-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.07.Pr
Opis:
Metal-oxide thin films have recently become good candidates for the hole transport layer material, for solving the stability problem in organic photovoltaic devices. Metal oxide semiconductors ($MoO_{x}$, WO₃, V₂O₅) are very promising because of their suitable optoelectronic properties, ambient stability, high work function, and solution processability. Intrinsic n-type behavior of molybdenum oxide ($MoO_{x}$) is found to enhance p-type doping effect on single-walled carbon nanotubes. In this study, the effect of using $MoO_{x}$ doped single-walled carbon nanotube films as hole transport layer in organic solar cells was investigated. Thin films and organic solar cells were characterized using scanning electron microscopy, atomic force microscopy, UV-NIR absorption spectroscopy and device current-voltage measurements.
Źródło:
Acta Physica Polonica A; 2017, 131, 3; 474-476
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
3-D seismic interpretation and volumetric estimation of “Osaja Field” Niger Delta, Nigeria
Autorzy:
Osaki, L.J.
Opara, A.I.
Okereke, C.N.
Adiela, U.P.
Njoku, I.O.
Emberga, T.T.
Eluwa, N.
Powiązania:
https://bibliotekanauki.pl/articles/10948.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Źródło:
International Letters of Natural Sciences; 2016, 59
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A 34-year retrospective study of equine viral abortion in Poland
Autorzy:
Bazanow, B.A.
Fracka, A.B.
Jackulak, N.A.
Staroniewicz, Z.M.
Ploch, S.M.
Powiązania:
https://bibliotekanauki.pl/articles/31818.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:
The purpose of the present review was a comparison of the abortions caused by EAV and EHV-1 viruses over the 34 years. A total of 452 tissues samples from aborted fetuses (347) or foals (105) stillborn or newborn that died within 72 hours were investigated. The material for the examinations came from different farms located throughout Poland. The tissue homogenates were examined by using virus isolation test in RK-13 and Vero cell lines and the cytopathic agent was confirmed as EHV-1 by the direct fluorescent antibody test or as EAV by the indirect fluorescent antibody test. The study indicated that EAV was isolated (104 cases, 23%) almost as equally often as EHV-1 (116 cases, 25.6%). Both, equid herpesvirus-associated abortion and the abortion induced by EAV were characterized by cyclicity. The percentage of EAV and EHV-1 isolation alternately reduced and increased, but the increase of isolation of one virus was accompanied by the decrease of the other. The domination of one virus over the other occurred in cycles of a few years.
Źródło:
Polish Journal of Veterinary Sciences; 2014, 17, 4
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A breakthrough in the efficiency of contact DNA insecticides: rapid high mortality rates in the sap-sucking insects Dynaspidiotus britannicus Comstock and Unaspis euonymi Newstead
Autorzy:
Gal`chinsky, N.
Useinov, R.
Yatskova, E.
Laikova, K.
Novikov, I.
Gorlov, M.
Trikoz, N.
Sharmagiy, A.
Plugatar, Y.
Oberemok, V.
Powiązania:
https://bibliotekanauki.pl/articles/2082776.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
antisense oligonucleotides
DNA insecticides
insect pest control
sap-sucking
insects
28S ribosomal RNA
Opis:
In this short communication describing experiments carried out on the larvae of two insects, Unaspis euonymi Comstock (feeding on Euonymus japonicus Thunb.) and Dynaspidiotus britannicus Newstead (feeding on Laurus nobilis L.), we evaluate for the first time the efficiency of using DNA insecticides in the control of sap-sucking insects, including armored scale insects. Over a period of 10 days, high insect mortality was detected in both U. euonymi and D. britannicus, accompanied by a significant decrease in the concentration of target RNAs. At the same time, no visible changes were observed when the leaves of the host plants were subjected to treatment with DNA insecticides for one month. The results show the high efficiency of DNA insecticides used against hemipteran insect pests. It is noteworthy that the high efficiency of DNA insecticides and their low cost in comparison with RNA preparations provides a safe and extremely promising potential vehicle for the control of sap-sucking insects.
Źródło:
Journal of Plant Protection Research; 2020, 60, 2; 220-223
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Comparative Assessment of the Impact of Different Occupations on Workers’ Static Musculoskeletal Fitness
Autorzy:
Chandra, A. M.
Ghosh, S.
Iqbal, R.
Sadhu, N.
Powiązania:
https://bibliotekanauki.pl/articles/90250.pdf
Data publikacji:
2007
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
occupations
repetitive movements
static muscular forces
musculoskeletal disorders
dynamometry
Opis:
An ergonomic assessment of the involvement of static muscular forces like back strength, grip strength and pinch strength in different occupations was made. A study was conducted on 45 normal adult males (15 subjects per group) which included video display terminal (VDT) operators, industrial workers and safety inspectors. Their maximum back strength, handgrip strength and pinch strength were measured with dynamometers. The observed values of back strength were significantly lower in VDT operators while significantly higher in safety inspectors and moderate in industrial workers. The values of grip strength and pinch strength of all sample groups were more or less similar. The findings clearly indicate that static muscular strength varies significantly in different occupations. Heavy static muscular load might lead to an accumulation of metabolic waste and toxins on the back resulting in lower back strength in VDT operators and industrial workers.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2007, 13, 3; 271-278
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Comparative Study of Residual Stress and Mechanical Properties for FSW and TIG Weld on Structural Steel
Autorzy:
Chaurasia, P. K.
Pandey, C.
Giri, A.
Saini, N.
Mahapatra, M. M.
Powiązania:
https://bibliotekanauki.pl/articles/354742.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
FSW
TIG
residual stress
microstructure
hardness
Opis:
Mechanical properties and residual stresses of friction stir welded and autogenous tungsten inert gas welded structural steel butt welds have been studied. Friction stir welding (FSW) of structural steel butt joints has been carried out by in-house prepared tungsten carbide tool with 20 mm/min welding speed and 931 rpm tool rotation. Tungsten inert gas (TIG) welding of the butt joints was carried out with welding current, arc voltage and the welding speed of 140 amp, 12 V and 90 mm/min respectively. Residual stress measurement in the butt welds has been carried out in weld fusion zone and heat affected zone (HAZ) by using blind hole drilling method. The magnitude of longitudinal residual stress along the weld line of TIG welded joints were observed to be higher than friction stir welded joint. In both TIG and FSW joints, the nature of longitudinal stress in the base metal was observed to be compressive whereas in HAZ was observed to be tensile. It can be stated that butt welds produced with FSW process had residual stress much lower than the autogenous TIG welds.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 2; 1019-1029
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A comparison of FLOTAC and CFF techniques in detecting gastrointestinal parasites in water buffaloes (Bubalus bubalis)
Autorzy:
Salvador, R.T.
Abalos, R.P.
Ruba, A.M.
Mingala, C.N.
Powiązania:
https://bibliotekanauki.pl/articles/5746.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
parasitism
FLOTAC technique
CFF technique
detection
gastrointestinal parasite
parasite
water buffalo
Bubalus bubalis
nematode
prevalence
Opis:
The objective of the study was to compare the usefulness of FLOTAC and centrifugal fecal flotation (CFF) techniques. More specifically, the taxonomic classes (Nematoda and Cestoda) of endoparasites present in fecal samples of buffaloes are identified, the sensitivity and specificity of FLOTAC relative to CFF are calculated, and the agreement of both techniques is evaluated using Kappa statistics. Fresh fecal samples from 220 buffaloes in 10 municipalities were collected. Sheather’s sugar was used as a flotation solution for both the FLOTAC and CFF techniques. Of the 220 animals, 109 samples were nematode positive and 111 samples were nematode negative according to the FLOTAC technique, while 74 were found to be positive and 146 negative according to the CFF technique. No cestodes were detected by either technique. The calculated sensitivity for FLOTAC is 89.19% and its specificity is 70.55%. Kappa statistics revealed moderate agreement (k=0.535) between the two techniques in detecting nematodes. The prevalence observed based on FLOTAC and CFF test were 49.54% (109/220; 95% CI: 47.75–56.34) and 33.64% (72/220; 95% CI: 27.42–40.3), respectively.
Źródło:
Annals of Parasitology; 2014, 60, 2
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A comparison of various imaging modes in scanning electron microscopy during evaluation of selected Si/refractory sessile drop couples after wettability tests at ultra-high temperature
Autorzy:
Polkowska, A.
Warmuzek, M.
Kalarus, J.
Polkowski, W.
Sobczak, N.
Powiązania:
https://bibliotekanauki.pl/articles/391383.pdf
Data publikacji:
2017
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Odlewnictwa
Tematy:
scanning electron microscopy
sessile drop method
silicon
refractories
in-lens detectors
Opis:
In this work, FEI SciosTM field emission gun scanning electron microscope (FEG SEM) equipped with a unique combination of analytical and imaging detectors was utilized to examine structure and chemistry of selected Si/ refractory couples. The couples were obtained in wettability tests performed by the sessile drop method coupled with contact heating of a refractory substrate (h-BN, SiC) at ultra-high temperature (up to 1750°C). The SEM observations were carried out on top-views of the couples, in order to evaluate surface and interfacial phenomena in Si/h-BN and Si/SiC systems. A full range of available detectors (e.g. classical Everhart-Thornley detector (ETD) or advanced in-lens detectors) working under various operation modes (secondary electrons (SE), backscattered electrons (BSE), a mixed mode), were used upon analyses in order to reveal specific features of obtained structures.
Źródło:
Prace Instytutu Odlewnictwa; 2017, 57, 4; 337-344
1899-2439
Pojawia się w:
Prace Instytutu Odlewnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A conceptual approach of information technology in environment science: research area and prospects of database generation
Autorzy:
Talapatra, S.N.
Nandy, A.
Pal, P.
Powiązania:
https://bibliotekanauki.pl/articles/11426.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
information technology
environmental science
environmental information
environmental technology
research area
prospect
computer database
environmental management
Opis:
The data of individual sector on environmental science is compiled in information technology (IT) through database software known as Environment Information (EI). Environment information is an easy accessible database in individual sector, where people can know both new research scope and impact on environment. The present study deals to inform that EI is an area, in which the knowledge of environmental science and IT is combined through database software. In this paper, individual research area, data format and beneficial aspects on environmental science is tabulated for EI. There are several research areas in which the data viz. ecology and ecosystem, biodiversity and conservation of important species, health hazards by diseases, health care facilities, toxicological aspects, wastes types, source generation and management, alternative energy generation facilities, environment education and awareness etc. It is a conceptual approach to gather knowledge of environment related problems and prospects and can easily make a database for the intellectuals, academicians, scientists, regulatory authorities, policy makers, researchers, students etc. These help to know benefits in research area, regulatory process, decision making and proper environment management. People can easily access compiled database in an individual sector of environment science.
Źródło:
International Letters of Natural Sciences; 2014, 10
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A contribution to the knowledge of bryophytes in polar areas subjected to rapid deglaciation: a case study from southeastern Spitsbergen
Autorzy:
Stebel, A.
Ochyra, R.
Konstantinova, N.A.
Ziaja, W.
Ostafin, K.
Maciejowski, W.
Powiązania:
https://bibliotekanauki.pl/articles/56913.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Botaniczne
Opis:
The paper provides a list of 54 species of bryophytes (48 mosses and six liverworts) collected from Spitsbergen, the largest island of the Arctic Svalbard archipelago (Norwegian Arctic), in 2016. They were collected mainly from its southeastern coast (Sørkapp Land and Torell Land), which has been rapidly abandoned by glaciers in the last few decades and is heavily under-investigated bryologically. The most interesting and phytogeographically important findings are the mosses Bryum salinum, Campylium longicuspis, Coscinodon cribrosus, Orthogrimmia sessitana, Pogonatum dentatum, Polytrichum juniperinum, Sanionia georgicouncinata, Schistidium frigidum, and S. pulchrum, and the liverwort Cephalozia bicuspidata. For each species, a short taxonomic and phytogeographical comment is provided, and the distribution of 12 rare or otherwise phytogeographically interesting species in Svalbard is shown on maps.
Źródło:
Acta Societatis Botanicorum Poloniae; 2018, 87, 4
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A control strategy of hybrid solar-wind energy generation system
Autorzy:
Sharma, H.
Pal, N.
Kumar, P.
Yadav, A.
Powiązania:
https://bibliotekanauki.pl/articles/141311.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
distributed PV/wind power system
double-input DC-DC converter
multivariable controller
voltage regulation
Opis:
Synchronization in the energy generated by renewable energy sources is one of the significant issue associated with the converter used in the system module. The presented paper concentrates on the design aspect of a PV and wind power input to a DC-DC converter which can be practically useful in hybrid renewable energy power systems. In this regard, the proposed converter can be utilized to obtain a smooth regulated output voltage from the given input renewable energy power sources. The proposed converter can be efficiently work under critical conditions having very few ripple in current waveform of input or output. A major advantage with this type of converter is the simple circuit with respect to the conventional converters in some critical situations. At the end, the result based on the simulation exercise and various experiments, performance of the converter in different situations is presented so that the efficiency of the designed converter arrangement is accepted.
Źródło:
Archives of Electrical Engineering; 2017, 66, 2; 241-251
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A cooperative positioning algorithm for DSRC enabled vehicular networks
Autorzy:
Efatmaneshnik, M.
Kealy, A.
Alam, N.
Dempster, A.
Powiązania:
https://bibliotekanauki.pl/articles/129825.pdf
Data publikacji:
2011
Wydawca:
Stowarzyszenie Geodetów Polskich
Tematy:
DSRC
Vanet
cooperative positioning
ranging
time of arrival
CRLB
Kalman filtering
robust positioning
pozycjonowanie
godzina przyjazdu
filtracja Kalmana
Opis:
Many of the safety related applications that can be facilitated by Dedicated Short Range Communications (DSRC), such as vehicle proximity warnings, automated braking (e.g. at level crossings), speed advisories, pedestrian alerts etc., rely on a robust vehicle positioning capability such as that provided by a Global Navigation Satellite System (GNSS). Vehicles in remote areas, entering tunnels, high rise areas or any high multipath/ weak signal environment will challenge the integrity of GNSS position solutions, and ultimately the safety application it underpins. To address this challenge, this paper presents an innovative application of Cooperative Positioning techniques within vehicular networks. CP refers to any method of integrating measurements from different positioning systems and sensors in order to improve the overall quality (accuracy and reliability) of the final position solution. This paper investigates the potential of the DSRC infrastructure itself to provide an intervehicular ranging signal that can be used as a measurement within the CP algorithm. In this paper, time-based techniques of ranging are introduced and bandwidth requirements are investigated and presented. The robustness of the CP algorithm to inter-vehicle connection failure as well as GNSS dropouts is also demonstrated using simulation studies. Finally, the performance of the Constrained Kalman Filter used to integrate GNSS measurements with DSRC derived range estimates within a typical VANET is described and evaluated.
Źródło:
Archiwum Fotogrametrii, Kartografii i Teledetekcji; 2011, 22; 117-129
2083-2214
2391-9477
Pojawia się w:
Archiwum Fotogrametrii, Kartografii i Teledetekcji
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A fatal case of canine cutaneous leishmaniosis in a dog
Autorzy:
Ortega-Pacheco, A.
Gutierrez-Blanco, E.
Escamilla- Flores, W.
Cordero-Guillermo, L.
Jimenez-Coello, M.
Loria-Cervera, N.
Powiązania:
https://bibliotekanauki.pl/articles/6731.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Parazytologiczne
Źródło:
Annals of Parasitology; 2019, 65, 2
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 2470

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