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Tytuł:
Environmental safety aspects of using UHF RFID systems in hospitals
Aspekty środowiskowego bezpieczeństwa wykorzystania systemów UHF RFID w szpitalach
Autorzy:
Zradziński, Patryk
Karpowicz, Jolanta
Gryz, Krzysztof
Suarez, Oscar J.
Trillo, Angeles M.
Hernandez, Jose A.
Miguel-Bilbao de, Silvia
Suarez, Samuel D.
Celaya-Echarri, Mikel
Azpilicueta, Leyre
Falcone, Francisco
Ramos, Victoria
Powiązania:
https://bibliotekanauki.pl/articles/2146754.pdf
Data publikacji:
2020
Wydawca:
Indygo Zahir Media
Tematy:
biomedical engineering
environmental engineering
occupational exposure
public health
AIMD
Internet of things
inżynieria biomedyczna
inżynieria środowiska
narażenie zawodowe
zdrowie publiczne
internet rzeczy
Opis:
Various applications of Radio Frequency IDentification (RFID) technology in the medical environment are characterised. The electromagnetic field (EMF) emitted by RFID handheld readers (RFID guns) is characterised and evaluated with respect to humans exposure metrics – the strength of the electric field affecting anyone present near various UHF (ultra-high frequency) RFID guns and the specific absorption rate (SAR) values in their body. UHF RFID systems are the most popular of such systems used in hospitals. The performed studies indicate that the EMF exposure level near the RFID gun antenna and SAR values (a measure of the thermal effects of EMF exposure) caused by exposure from the RFID reader may exceed the limits of the electric field and SAR issued by international guidelines or legislation. Potentially excessive exposure to EMF emitted by UHF RFID readers is not limited to the user of the device, but may also apply to patients or bystanders. Only UHF RFID guns with an EMF emission lower than 1 W may be considered as an insignificant source of human exposure. The use of readers with a radiated power exceeding 1 W requires the evaluation of the EMF level using measurements, and also the evaluation of SAR by numerical modelling in the case of their use in close proximity to humans. In all cases, insufficient electromagnetic immunity of electronic devices (including medical implants) should be considered near RFID guns at least up to half of the reading range away from the RFID reader. The electromagnetic hazards related to the use of RFID guns may be limited by relevant preventive measures, as shown in this paper, together with the principles of an in-situ evaluation of electromagnetic hazards near the UHF RFID guns.
Scharakteryzowano różne zastosowania technologii identyfikacji radiowej (RFID) w środowisku medycznym. Pole elektromagnetyczne emitowane przez ręczne czytniki RFID (RFID guns) zostało scharakteryzowane i ocenione w odniesieniu do miar narażenia ludzi – natężenia pola elektrycznego oddziałującego na osoby znajdujące się w pobliżu różnych czytników RFID UHF (ultrawysokiej częstotliwości) i współczynnika SAR w ich ciele. System UHF RFID jest najpopularniejszym z systemów RFID użytkowanych m.in. w szpitalach. Przeprowadzone badania wskazują, że poziom ekspozycji na pole elektromagnetyczne w pobliżu anteny ręcznego czytnika RFID i wartości SAR (miara skutków termicznych oddziaływania pola elektromagnetycznego) spowodowane tą ekspozycją mogą przekraczać limity, opublikowane w zleceniach międzynarodowych lub przepisach. Nadmierna ekspozycja na pole elektromagnetyczne emitowane przez czytniki RFID UHF może dotyczyć nie tylko użytkownika urządzenia, ale również pacjenta lub osoby postronnej. Tylko ręczne czytniki RFID UHF o emisji pola elektromagnetycznego poniżej 1 W można uznać za nieistotne źródło narażenia ludzi. Korzystanie z czytników o mocy przekraczającej 1 W wymaga oceny poziomu pola elektromagnetycznego za pomocą pomiarów, a również oceny SAR za pomocą modelowania numerycznego w przypadku ich użycia w bezpośredniej bliskości ludzi. We wszystkich przypadkach niewystarczającą odporność elektromagnetyczną urządzeń elektronicznych (w tym implantów medycznych) należy rozważyć w pobliżu czytników RFID co najmniej do odległości od czytnika RFID równej połowie jego zasięgu odczytu. Zagrożenia elektromagnetyczne związane z używaniem ręcznych czytników RFID mogą być ograniczone przez odpowiednie środki ochronne, jak pokazano w tym artykule, wraz z zasadami oceny zagrożeń elektromagnetycznych in-situ w pobliżu ręcznych czytników UHF RFID.
Źródło:
Inżynier i Fizyk Medyczny; 2020, 9, 2; 133--140
2300-1410
Pojawia się w:
Inżynier i Fizyk Medyczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Porównanie właściwości wolnych rodników w streptomycynie sterylizowanej radiacyjnie i termicznie
Comparison of free radicals properties in radiosterilised and thermal sterilized streptomycin
Autorzy:
Wilczyński, S.
Ramos, P.
Pilawa, B.
Ptaszkiewicz, M.
Swakoń, J.
Olko, P.
Powiązania:
https://bibliotekanauki.pl/articles/283986.pdf
Data publikacji:
2009
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
wolne rodniki
sterylizacja termiczna
sterylizacja radiacyjna
streptomycyna
EPR
free radicals
thermal sterilization
radiosterilization
streptomycin
Opis:
Sterylność substancji leczniczej jest niezwykle istot-na z punktu widzenia bezpieczeństwa farmakoterapii. Sterylizacja leków może powodować powstawanie wolnych rodników. Porównano właściwości wolnych rodników powstających pod wpływem promieniowania termicznego (180°C/30 minut) i promieniowania gamma (25kGy) w streptomycynie. Badania prze-prowadzono przy użyciu techniki elektronowego rezonansu paramagnetycznego EPR na pasmo X. Zarówno dla próbek sterylizowanych termicznie jak i radiacyjnie zarejestrowano szerokie linie EPR. Obydwie metody sterylizacji prowadzą do powstania wysokich koncentracji wolnych rodników (1016–1018 spin/g). Porównanie parametrów linii EPR dla sterylizacji termicznej i radiacyjnej wskazuje na podobne właściwości wolnych rodników w sterylizowanej próbce – niesparowane elektrony zlokalizowane na atomie tlenu. Więcej wolnych rodników, w przypadku zastosowanych parametrów sterylizacji, powstaje w próbkach sterylizowanych radiacyjnie.
Sterility of medical substances plays significant role from the point of view of pharmacotherapy safety. Drugs sterilization can cause free radicals forming. It was compared free radicals properties forming in streptomycin under the influence thermal radiation (180°C/30 minutes) and gamma radiation (25kGy). Presented studies were performed by use of X band electron paramagnetic spectrometer. Both for thermal sterilized samples as well as for radiosterilized broad EPR lines were recorded. Both methods of sterilization lead to forming of high concentrations of free radicals (1016–1018spin/g). Comparing of EPR lines parameters for thermal sterilization and radiosterilization point at similar free radicals properties in the studied samples – unpaired electrons located on oxygen atoms. More free radicals, in case of used sterilization parameters, create in radiosterilized samples.
Źródło:
Engineering of Biomaterials; 2009, 12, no. 89-91; 171-173
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Physical and chemical characterization of masa and tortillas from parental lines, crosses, and one hybrid
Autorzy:
Valderrama-Bravo, C.
Dominguez-Pacheco, A.
Hernandez-Aguilar, C.
Zepeda-Bautista, R.
del Real-Lopez, A.
Pahua-Ramos, M.E.
Arellano-Vazquez, J.L.
Moreno-Martinez, E.
Powiązania:
https://bibliotekanauki.pl/articles/24739.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Opis:
In maize plant breeding aimed at producing a hybrid, it is necessary to characterize the parents and hybrids by their agronomic aspects and grain quality so that the processing industry may offer consumers a quality product and also improve its efficiency. This study evaluated the viscoelastic parameters of masa and the chemical and texture properties of tortillas obtained from parent lines (M-54, M55, and CML-242), two single crosses (M54xM55 and M55xM54), and one hybrid (H-70). The morpho- logy of the maize grains and tortillas was analyzed using scanning electron microscopy. The firmness of masa obtained from CML-242 and H-70 maize was higher than that from the other maize genotypes. M-54 tortillas showed the lowest crude fiber content. Otherwise, tortillas obtained from the M55xM54 hard grain had the lowest fat content and extensibility, while H-70 tortillas showed an intermediate breaking point and extensibility. M-54 and M54xM55 tortillas were softer due to their more swollen starch granules. In contrast, rigid tortillas were obtained from CML-242 and H-70. Grain hardness causes different morphology in starch and tortilla of maize genotypes. However, grain hardness did not influence the characteristics of texture in tortillas.
Źródło:
International Agrophysics; 2017, 31, 1
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The biological degradation of pure bone cement and bone cement with nanometals
Autorzy:
Świeczko-Żurek, Beata
Ramos, António
Żurek, Marcin
Pałubicka, Anna
Gajowiec, Grzegorz
Powiązania:
https://bibliotekanauki.pl/articles/284131.pdf
Data publikacji:
2019
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Źródło:
Engineering of Biomaterials; 2019, 22, no.153; 12
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
ESR Studies of Paramagnetic Centers in Pharmaceutical Materials - Cefaclor and Clarithromycin as an Example
Autorzy:
Skowronska, A.
Wojciechowski, M.
Ramos, P.
Pilawa, B.
Kruk, D.
Powiązania:
https://bibliotekanauki.pl/articles/1490205.pdf
Data publikacji:
2012-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
87.15.La
87.64.kj
87.64.kh
75.10.Dg
Opis:
Electron spin resonance (ESR) studies of two antibiotics, Cefaclor and Clarithromycin, have been performed in order to investigate concentration and dynamics of free radicals generated in these compounds due to thermal sterilization. For Cefaclor three combinations of temperature and heating time have been applied: 160°C, 170°C, 180°C for 120 min, 60 min, and 30 min, respectively, according to the pharmaceutical sterilization norm. Clarithromycin has been heated at 160°C for 120 min. The ESR lineshape has been investigated versus microwave power ranging from 2.2 mW to 70 mW. Electron spin-spin relaxation time has been estimated from the ESR lineshape analysis. Concentrations of radicals generated due to different sterilization procedures have been compared with the purpose to select the best sterilization scheme.
Źródło:
Acta Physica Polonica A; 2012, 121, 2; 514-517
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Trace fossils from the Upper Cretaceous Capacete Formation, Sanfranciscana Basin, Central Brazil
Autorzy:
Sedorko, Daniel
Alessandretti, Luciano
Warren, Lucas Veríssimo
Verde, Mariano
Rangel, Caio César
Ramos, Kimberly Silva
Netto, Renata Guimarães
Powiązania:
https://bibliotekanauki.pl/articles/1836263.pdf
Data publikacji:
2020
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
meandering fluvial system
insects
continental trace fossils
Scoyenia ichnofacies
Opis:
The Upper Cretaceous Capacete Formation, from the intracratonic Sanfranciscana Basin, central Brazil, consists of epiclastic sediments with a significant aeolian contribution. This unit has been traditionally interpreted as deposited by alluvial fans distally grading to braided rivers in an arid- to semiarid climate within the central part of southwestern Gondwana. Locally, some expositions with wide lateral extension show architectural elements indicative of deposition in meandering rivers, such as floodplain fines (FF) interbedded with crevasse splay (CR), lateral-accretion macroforms (LA), and channels (CH). Bioturbation within the meandering fluvial deposits is commonly associated with the floodplain element, mainly occurring in fine-grained sandstone and mudstone. The lateral-accretion elements and channel deposits are barren of trace fossils. Sandstone with climbing ripples (Sr) from the element CR show low bioturbation of meniscate trace fossils assigned to Taenidium, Beaconites, and Scoyenia ichnogenera. Simple vertical and horizontal burrows identified as Skolithos and Palaeophycus occur associated with Taenidium and Camborygma in sandstone facies (Sr, St and Sh), as well as rhizoliths, representing the Scoyenia ichnofacies. The predominance of trace fossils related to the FF and CR architectural elements attests to the colonization mostly by insects in episodic and vegetated flood plains of the meandering river system from the Capacete Formation. Thus, despite the primarily arid to semiarid conditions interpreted for the inner parts of the newly formed South American continent during the Upper Cretaceous, our new data support deposition under humid conditions in some intervals of the Capacete Formation from the Sanfranciscana Basin.
Źródło:
Annales Societatis Geologorum Poloniae; 2020, 90, 3; 247-260
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bacterial recognition of thermal glycation products derived from porcine serum albumin with lactose
Autorzy:
Sarabia-Sainz, Andre-i
Ramos-Clamont, Gabriela
Winzerling, Joy
Vázquez-Moreno, Luz
Powiązania:
https://bibliotekanauki.pl/articles/1039957.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
neoglycans
bacterial recognition
E. coli K88 adhesion
glycation of serum albumin
Opis:
Recently, glyco-therapy is proposed to prevent the interaction of bacterial lectins with host ligands (glycoconjugates). This interaction represents the first step in infection. Neoglycans referred to as PSA-Lac (PSA-Glu (β1-4) Gal) were obtained by conjugation of porcine serum albumin (PSA) with lactose at 80 °C, 100 °C and 120 ºC. Characterization studies of the products showed that PSA could contain 1, 38 or 41 added lactoses, depending on the reaction temperature. These neoglycans were approximately 10 times more glycated than PSA-Lac obtained in previous work. Lactose conjugation occurred only at lysines and PSA-Lac contained terminal galactoses as confirmed by Ricinus communis lectin recognition. Furthermore, Escherichia coli K88+, K88ab, K88ac and K88ad adhesins showed affinity toward all PSA-Lac neoglycans, and the most effective was the PSA-Lac obtained after 100 ºC treatment. In vitro, this neoglycan partially inhibited the adhesion of E. coli K88+ to piglet mucin (its natural ligand). These results provide support for the hypothesis that glycated proteins can be used as an alternative for bioactive compounds for disease prevention.
Źródło:
Acta Biochimica Polonica; 2011, 58, 1; 95-100
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Novel System Architecture for an Improved Self-care Solution – Conceptual Design and Key Components
Autorzy:
Santos, Patrick
Ramos, Jorge
Seabra, Eduardo
Castro, José
Powiązania:
https://bibliotekanauki.pl/articles/1839314.pdf
Data publikacji:
2020
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
adaptive interfaces
big data analytics
data mining
user profiling
Opis:
The high penetration rate that mobile devices enjoy in to day’s society has facilitated the creation of new digital services, with those offered by operators and content providers standing out. However, even this has failed to encourage consumers to express positive opinions on telecommunication services, especially when compared with other sectors. One of the main reasons of the mistrust shown is the low level of quality of customer service provided an area that generates high costs for the operators themselves, due to the high number of people employed at call centers in order to handle the volume of calls received. To face these challenges, operators launched self-care applications in order to provide customers with a tool that would allow them to autonomously manage the services they have subscribed. In this paper, we present an architecture that provides customized information to customers – a solution that is separate from mobile operating systems and communication technologies.
Źródło:
Journal of Telecommunications and Information Technology; 2020, 4; 88-97
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Portuguese version of the Swedish Occupational Fatigue Inventory (SOFI) among assembly workers: Cultural adaptation, reliability and validity
Autorzy:
Santos, Joana
Carvalhais, Carlos
Ramos, Catarina
Coelho, Tiago
Monteiro, Pedro R.
Vaz, Mário A.
Powiązania:
https://bibliotekanauki.pl/articles/2161877.pdf
Data publikacji:
2017-05-08
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
reliability
confirmatory factor analysis
validity
cultural adaptation
perceived fatigue
Swedish Occupational Fatigue Inventory
Opis:
Objectives Reliable and valid instruments are essential for understanding fatigue in occupational settings. This study analyzed the psychometric properties of the Portuguese version of the Swedish Occupational Fatigue Inventory (SOFI). Material and Methods A cross-sectional study was conducted with 218 workers from an automotive industry involved in assembly tasks for fabrication of mechanical cables. Convergent and discriminant validity, internal consistency reliability and confirmatory factor analysis were performed. Results Results showed adequate fit to data, yielding a 20-item, 5-factor structure (all intercorrelated): Chi²/df (ratio Chi² and degrees of freedom) = 2.530, confirmatory fit index (CFI) = 0.919, goodness of fit index (GFI) = 0.845, root mean square error of approximation (RMSEA) = 0.084. The SOFI presented an adequate internal consistency, with the sub-scales and total scale presenting good reliability values (Cronbach’s α values from 0.742 to 0.903 and 0.943 respectively). Conclusions Findings suggest that the Portuguese version of the SOFI may be a useful tool to assess fatigue and prevent work-related injuries. In future research, other instruments should be used as an external criterion to correlate with the SOFI dimensions. Int J Occup Med Environ Health 2017;30(3):407–417
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2017, 30, 3; 407-417
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
DSPIC - Based impedance measuring instrument
Autorzy:
Santos, J.
Ramos, P. M.
Powiązania:
https://bibliotekanauki.pl/articles/220477.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
impedance measurement
dsPIC
ADC
sine-fitting
Opis:
An implemented impedance measuring instrument is described in this paper. The device uses a dsPIC (Digital Signal Peripheral Interface Controller) as a processing unit, and a DDS (Direct Digital Synthesizer) to stimulate the measurement circuit composed by the reference impedance and the unknown impedance. The voltages across the impedances are amplified by programmable gain instrumentation amplifiers and then digitized by analog to digital converters. The impedance is measured by applying a seven-parameter sine-fitting algorithm to estimate the sine signal parameters. The dsPIC communicates through RS-232 or USB with a computer, where the measurement results can be analyzed. The device also has an LCD to display the measurement results.
Źródło:
Metrology and Measurement Systems; 2011, 18, 2; 185-198
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On roughness measurement by angular speckle correlation
Autorzy:
Salazar, F.
Belenguer, T.
García, J.
Ramos, G.
Powiązania:
https://bibliotekanauki.pl/articles/220643.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
roughness
speckle
non-destructive testing
Opis:
In this work, the influence of both characteristics of the lens and misalignment of the incident beams on roughness measurement is presented. To investigate how the focal length and diameter affect the degree of correlation between the speckle patterns, a set of experiments with different lenses is performed. On the other hand, the roughness when the beams separated by an amount are non-coincident at the same point on the sample is measured. To conclude the study, the uncertainty of the method is calculated.
Źródło:
Metrology and Measurement Systems; 2012, 19, 2; 373-380
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Plant hemoglobins can be maintained in active form by reduced flavins and confer tolerance to nitro-oxidative stress
Autorzy:
Sainz, M.
Perez-Rontome, C.
Ramos, J.
Mulet, J.
James, E.
Becana, M.
Powiązania:
https://bibliotekanauki.pl/articles/81132.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
plant
hemoglobin
nitric oxide
nonsymbiotic hemoglobin
flavin
chloroplast
thylakoid
oxidative stress
methyl viologen
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2013, 94, 2
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
High incidence of acute leukemia in the proximity of some industrial facilities in El Bierzo, northwestern Spain
Autorzy:
Rodríguez-García, José A.
Ramos, Fernando
Powiązania:
https://bibliotekanauki.pl/articles/2180111.pdf
Data publikacji:
2012-03-01
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
acute leukemia
Benzo(a)pyrene
industrial facilities
electromagnetic radiation
power lines
thermoelectric power plant
Opis:
Objectives: To estimate the incidence of acute leukemia (AL) in El Bierzo (BZ) and to carry out a cross-association analysis in order to suggest some etiological clues. Materials and Methods: We registered all new AL cases diagnosed 2000–2005. Annual standardized incidence rate (SIR) was calculated by the direct method. A cross-association analysis was performed by non-parametric methods and we checked the potential interaction between putative etiological factors by calculating Chi-square-for-trend. Results: SIR was 5.1 cases per 100 000, surpassing the Spanish, European and world average figures and heterogeneous throughout the region. We detected a negative correlation between acute myeloblastic leukemia (AML) SIR in every municipality and both the air distance to the nearest thermoelectric power plant (TPP) (Rho = –0.409; p = 0.01) and to the point of maximum density of the high-power lines (HPL) network (Rho = –0.329; p = 0.04). Accordingly, SIR was higher in the municipalities situated < 7.5 km away from TPP (9.58 vs. 1.72; p = 0.004) or < 10 km away from HPL (3.90 vs. 3.19; p = 0.045). A positive relation between both factors was observed (Chi-square-for-trend = 9.209; p = 0.006). Conclusions: SIR of AL in BZ is higher than the Spanish average and that of most countries in the world. Residing near TPP or HPL confers a higher risk of AML, with synergistic effect between both factors.
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2012, 25, 1; 22-30
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 108

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