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Wyświetlanie 1-15 z 880
Tytuł:
Connecting the dots: understanding the relationship between religiosity, psychological resilience and depression in breast cancer patients
Autorzy:
Fradelos, E.C.
Powiązania:
https://bibliotekanauki.pl/articles/1918864.pdf
Data publikacji:
2019-08-26
Wydawca:
Uniwersytet Medyczny w Białymstoku
Tematy:
Religiosity
breast cancer
depression
psychological resilience
Opis:
Introduction: Death anxiety, fear of abundance, isolation, stigma of the disease and medication side effects are among the most common sources of anxiety and depression in patients with breast cancer. Purpose: To examine the possible relationship between religiosity, psychological resilience and depression on breast cancer patients. Materials and methods: A cross-sectional design was employed in this study which 152 breast cancer patients participated. Data were collected with the following instruments: Patient Health Questionnaire-2-item scale, Connor-Davidson Resilience Scale 25 and Centrality of Religiosity Scale and a special designed sheet reporting social, demographic and clinical characteristics. Statistical analyses were conducted with the Statistical Package for the Social Science V25. Descriptive statistics such means, and frequencies were calculated and inferential statistics such correlation test, simple and multiple regression analysis were applied. Results: Approximately 1 in 3 patients suffered symptoms of depression while they were reporting moderate religiosity and resilience values. Based on the four-step mediation analysis religiosity was strongly associated with psychological resilience but it was not found to affect directly either depression, but psychological resilience can be a mediator between religiosity and depression. Conclusion: This study supports the notion thatreligiosity and spirituality can have a beneficial influence on health outcomes.
Źródło:
Progress in Health Sciences; 2019, 1; 98-104
2083-1617
Pojawia się w:
Progress in Health Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Toxicity of Medical Glove Materials: A Pilot Study
Autorzy:
Lonnroth, E. C.
Powiązania:
https://bibliotekanauki.pl/articles/90537.pdf
Data publikacji:
2005
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
toxicity
natural rubber latex
synthetic rubbers
synthetic polymeric materials
toksyczność skórna
toksykologia
lateks
rękawice izolujące
materiały izolacyjne
Opis:
Cytotoxicity of 14 glove materials representing 4 natural rubber latex, 6 synthetic rubber and 4 synthetic polymeric materials was evaluated using dimethylthiazol diphenyltetrazolium (MTT), agar overlay and filter diffusion tests. Cell responses after contact with extracts of glove materials and contact with glove materials were assessed. One synthetic rubber glove (nitrile rubber) and 2 synthetic polymeric gloves (polyvinyl chloride) were non-toxic in all 3 tests, while 5 synthetic rubbers exhibited varying degrees of cytotoxicity, depending on the test. A severe cytotoxic response to both extracts of natural rubber latex materials and contact with natural rubber latex was verified in the 3 tests, indicating a need for consideration when selecting gloves, or other products, used in close skin contact.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2005, 11, 2; 131-139
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Critical metrological evaluation of fuel analyses by measurement uncertainty
Autorzy:
Oliveira, E. C.
Powiązania:
https://bibliotekanauki.pl/articles/220460.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
measurement uncertainty
critical metrological evaluation
resolution of the volumetric glassware
blank analytical
fuel analyses
Opis:
It is now widely recognized that the evaluation of the uncertainty associated with a result is an essential part of any quantitative analysis. One way to use the estimation of measurement uncertainty as a metrological critical evaluation tool is the identification of sources of uncertainty on the analytical result, knowing the weak steps, in order to improve the method, when it is necessary. In this work, this methodology is applied to fuel analyses and the results show that the relevant sources of uncertainty are: beyond the repeatability, the resolution of the volumetric glassware and the blank in the analytical curve that are little studied.
Źródło:
Metrology and Measurement Systems; 2011, 18, 2; 235-247
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simplified calibration methodology of chromatographs used in custody transfer measurements of natural gas
Autorzy:
Oliveira, E. C.
Powiązania:
https://bibliotekanauki.pl/articles/220682.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
simplified calibration
gas chromatography
superior calorific value
compressibility factor
natural gas
Opis:
The properties, superior calorific value (SCV) and the compressibility factor (z), of 77 natural gas (NG) samples are calculated from two different calibration approaches of gas chromatography, based on ISO 6974-2. The method A uses an analytical curve with seven points that the best adjust is confirmed by Analysis of Variance (ANOVA); it is required when the composition of the natural gas varies. The method B uses a single point calibration, with an allowed tolerance between the calibration gas mixture and sample mole fraction, so it is used to analyze constant natural gas streams. From natural gas composition analyzed by both methods, exceeding the method B allowed tolerance; SCV, z and its uncertainties are calculated and compared. The results show that all samples that comply with Brazilian legislation can be analyzed by method B, because there are no metrological differences in terms of SCV and z, even though the allowed tolerance has been exceeded. This simplified methodology minimizes operator exposure, besides saving about US$ 50,000.00 per chromatograph.
Źródło:
Metrology and Measurement Systems; 2012, 19, 2; 405-416
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Scattering Theory for the Quantum Envelope of a Classical System
Autorzy:
Sudarshan, E. C. G.
Powiązania:
https://bibliotekanauki.pl/articles/1931276.pdf
Data publikacji:
1994-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
03.20.+i
46.10.+z
Opis:
Classical dynamics, reformulated in terms of its quantum envelope is studied for the stationary states of the interacting system. The dynamical variable of "elapsed time" plays a crucial role in this study. It is shown that the perturbation series for the elapsed time can be summed in various simple cases even when standard perturbation series diverge. For the special class of systems where the interactions fall off sufficiently fast at infinity, one could define "in" and "out" states; and consequently the wave matrices and scattering matrices. The scattering phase shifts bear a simple relation to the time delay in scattering.
Źródło:
Acta Physica Polonica A; 1994, 85, 4; 725-740
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Paulinella chromatophora - rethinking the transition from endosymbiont to organelle
Autorzy:
Nowack, E.C.M.
Powiązania:
https://bibliotekanauki.pl/articles/57807.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
Paulinella chromatophora
organellogenesis
plastid
evolution
endosymbiosis
Cyanoprokaryota
photosynthesis
chromatophore
protein targeting
endosymbiont
organelle
Rhizaria
Opis:
Eukaryotes co-opted photosynthetic carbon fixation from prokaryotes by engulfing a cyanobacterium and stably integrating it as a photosynthetic organelle (plastid) in a process known as primary endosymbiosis. The sheer complexity of interactions between a plastid and the surrounding cell that started to evolve over 1 billion years ago, make it challenging to reconstruct intermediate steps in organelle evolution by studying extant plastids. Recently, the photosynthetic amoeba Paulinella chromatophora was identified as a much sought-after intermediate stage in the evolution of a photosynthetic organelle. This article reviews the current knowledge on this unique organism. In particular it describes how the interplay of reductive genome evolution, gene transfers, and trafficking of host-encoded proteins into the cyanobacterial endosymbiont contributed to transform the symbiont into a nascent photosynthetic organelle. Together with recent results from various other endosymbiotic associations a picture emerges that lets the targeting of host-encoded proteins into bacterial endosymbionts appear as an early step in the establishment of an endosymbiotic relationship that enables the host to gain control over the endosymbiont.
Źródło:
Acta Societatis Botanicorum Poloniae; 2014, 83, 4
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Froth stabilisation using nanoparticles in mineral flotation
Autorzy:
Cilek, E. C.
Uysal, K.
Powiązania:
https://bibliotekanauki.pl/articles/109599.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
nanoparticles
bubble size
sulphide ore
flotation froths
Opis:
In this study, three kinds of nanoparticles (SiO2, Fe2O3, and Al2O3) were used in the flotation of a sulphide ore to investigate the effects of nanoparticles on the froth stability and the flotation performance. The dynamic froth stability factor and the maximum froth depth were measured by using a non-overflowing flotation cell under various flotation conditions. The results were also related to the separation selectivity and efficiency of the flotation. The experimental results showed that the dynamic froth stability factor and the maximum froth depth can be increased 1.2-2 fold by using the Al2O3 nanoparticles. These increments led to significant improve in the froth recovery. In terms of the froth stability and the flotation performance, the Al2O3 nanomaterial was the best, followed by Fe2O3 and SiO2. In addition, the flotation recovery increased from 83 to 91%, and the grade of the concentrate increased from 44 to 60% by using the Al2O3 nanoparticles.
Źródło:
Physicochemical Problems of Mineral Processing; 2018, 54, 3; 878-889
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimization of the sizing process with grey relational analysis
Optymalizacja procesu nanoszenia preparacji przy wykorzystaniu analizy zbiorów rozmytych
Autorzy:
Sarpkaya, C.
Sabir, E. C.
Powiązania:
https://bibliotekanauki.pl/articles/231938.pdf
Data publikacji:
2016
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Tematy:
sizing
orthogonal array
grey relational analysis
optimization
proces nanoszenia preparacji
macierz ortogonalna
zbiór rozmyty
Opis:
The sizing process is an important one for textile mills and affects the efficiency of the loom machine. In this study, the optimization of multiple performance characteristics based on the grey relations analysis method, which is a new approach for optimization of the sizing process was researched using the Taguchi L18 (mixed 3 - 6 level) experimental plan. The process parameters selected: warp yarn count, the viscosity of the sizing solution and the dispatch speed of the warp yarn passing from the sizing machine, were optimized. In the experimental design of Taguchi L18 (mixed 3 - 6 level), the warp yarn count factor was chosen as 3 levels (12, 10 and 8 tex), the viscosity of the sizing solution factor as 3 levels (14, 20, & 24 Ns/m2), and the dispatch speed of the warp yarn passing from the sizing machine factor was selected as 6 levels (40, 50, 60, 70, 80, & 90 m/min). Quality characteristics were determined as the warp yarn strength, and the efficiency of the loom machine. A grey relational grade obtained from the grey relational analysis is used to solve the sizing process with multiple performance characteristics. Optimum levels for the sizing process parameters were determined using the grey relation grade.
Proces nanoszenia preparacji jest ważny w procesie produkcji tkanin i wpływa na wydajność stosowanych krosien. Przeprowadzono optymalizacje szeregu parametrów procesu stosując metodę analizy zbiorów rozmytych będącą nowością w analizie procesu nanoszenia preparacji . Wykorzystano plan Tagucchi dla realizacji eksperymentu. Analizę przeprowadzono dla trzech przędz o różnych masach liniowych, trzech różnych lepkościach roztworu preparacji i trzech różnych prędkościach osnowy przechodzącej przez urządzenie do preparacji. Określono charakterystykę jakościową biorąc pod uwagę wytrzymałość osnowy i wydajność krosna. Optymalne wartości parametrów procesu preparacji określono przy zastosowaniu metody zbiorów rozmytych.
Źródło:
Fibres & Textiles in Eastern Europe; 2016, 1 (115); 49-55
1230-3666
2300-7354
Pojawia się w:
Fibres & Textiles in Eastern Europe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Correlation Between Symptoms, Frequent Use of Dental Polymers, and Evaluation of Health Risk
Autorzy:
Lonnroth, E. C.
Shahnavaz, H.
Powiązania:
https://bibliotekanauki.pl/articles/90749.pdf
Data publikacji:
1998
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
dental personnel
correlation analysis
self-reported symptoms
dental polymer use
health risk evaluation
personel dentystyczny
analiza korelacji
ryzyko zdrowotne
Opis:
Dental personnel are at risk as they manually handle polymer products containing monomers and additives that cause irritation and induce allergy. Gloves and face masks can be easily penetrated by monomers. A total of 587 dental personnel and a referent group (585) in the 2 most northern regions of Sweden were included in a questionnaire study (response rate 76%). Questions were asked regarding symptoms of atopy, asthma, conjunctivitis, atopic dermatitis, hand dermatitis, and hay fever/rhinitis. The dental personnel were asked to give the name of polymer products used in their practice and the frequency of use. They were also asked to risk evaluate 5 different types of polymer materials on a scale from 1 to 5. Analysis was done to find if the occurrence of a symptom was associated with a high risk evaluation of a polymer material, or with frequent use of a certain polymer product. Significantly more dentists reported symptoms of atopic dermatitis and conjunctivitis compared to referents and chair assistants. Results show that dental personnel with symptoms risk evaluated most materials significantly higher than dental personnel without symptoms. Further, the occurrence of some symptoms was associated with frequent use of 8 polymer products.
Źródło:
International Journal of Occupational Safety and Ergonomics; 1998, 4, 4; 411-421
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Users’ Demands Regarding Dental Safety Glasses. Combining a Quantitative Approach and Grounded Theory for the Data Analysis
Autorzy:
Lonnroth, E. C.
Shahnavaz, H.
Powiązania:
https://bibliotekanauki.pl/articles/91224.pdf
Data publikacji:
2001
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
dental safety glasses
user's demands
qualitative and quantitative methods
usługi stomatologiczne
środki ochrony indywidualnej
okulary ochronne
okulary filtracyjne
choroby oczu i przydatków
personel służby zdrowia
Opis:
Eye infections are common among dentists and many are concerned, but few are using proper eye protection. To understand users’ demands behind the low use of safety glasses, all dental teams in Sweden were asked which factors they found most important when choosing dental safety glasses, and rate the importance of 31 statements regarding ergonomic aspects of dental safety glasses in a questionnaire. Data were analysed using the Grounded Theory and a quantitative approach. Results showed that dentists ranked the visual aspects as most important and chair assistants the protective aspects. The highly visual demanding work performed by dentists requires safety glasses that are not yet available on the market, which might explain the low use.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2001, 7, 1; 49-59
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Appropriated Islam: Hindu-Muslim cultural symbiosis and matriliny among the Mappilas of Kerala
Autorzy:
Farook, Musthafa
Haskerali, E.C
Powiązania:
https://bibliotekanauki.pl/articles/957819.pdf
Data publikacji:
2017
Wydawca:
Fundacja Pro Scientia Publica
Tematy:
matriliny
mappila
tharavad
karanavan
mut’a
Opis:
Marumakkathayam or the  matrilineal form of inheritance is an important social institution that emerged in Kerala around the beginning of Ninth Century A.D. Some prominent sections in the Hindu community practised this system. Joint families under the  headship of the eldest female member was a peculiar feature of this system. The male members were visitors of the household and the inheritance of the property went to the children of the female members. Gradually, the women became the owners of  property. The system was also prevalent among the Mappilas of the land. Different reasons are attributed for the emergence of matriliny among them. But the conversion of the matrilineal Hindus to Islam is the real cause for adaptation of this institution in Muslim society.
Źródło:
Journal of Education Culture and Society; 2017, 8, 2; 268-274
2081-1640
Pojawia się w:
Journal of Education Culture and Society
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
User services of tactical communications in the digital age
Autorzy:
Erkan, E. Ç.
Uzun, Ş.
Powiązania:
https://bibliotekanauki.pl/articles/308312.pdf
Data publikacji:
2004
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
tactical communications
IP
X.25
C4I systems
Opis:
Increasing demands on an extensive amount of digital data and information flows for C4I is forcing the modern armies to freeze and omit EUROCOM based tactical area communications system and to develop new concepts based on the adoption of modern communication systems such as ISDN, ATM described in the TACOMS Post 2000 Final Report II in NATO. ASELSAN, as a leading company in the military electronics arena, is following and participating all the activities of TACOMS Post 2000 together with Turkish Ministry of Defense. Turkey's tactical area communications system TASMUS is a mature and fielded system, which will satisfy future communication needs of the 21st century C4I systems. In this paper, we describe the basic features and user services of TASMUS. With the support of simultaneous voice and data capabilities, TASMUS aims to form mobile, survivable, flexible and secure network to support all the present and future communication requirements of the tactical commanders. Using the near real time data communications feature, TASMUS is also significant for the network-centric warfare applications such as tactical sensor and weapon systems, besides the communication needs of the Turkish Army.
Źródło:
Journal of Telecommunications and Information Technology; 2004, 4; 39-44
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 880

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