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Wyświetlanie 1-100 z 133
Tytuł:
Instrukcja o pracy przyrządu chemika zwiadowcy służby medycznej i weterynaryjnej P.Ch.R.-46-MW
Data publikacji:
1958
Wydawca:
Warszawa : [b.w.]
Tematy:
Sprzęt przeciwchemiczny opis i użytkowanie 1958 r. regulaminy
Służba zdrowia wojska sprzęt przeciwchemiczny wykorzystanie 1958 r. regulaminy
Opis:
Tyt. okł.: Zalecam do użytku "Instrukcję o pracy przyrządu chemika zwiadowcy służby medycznej i weterynaryjnej" P.Ch.R.-46-MW.
Dostawca treści:
Bibliografia CBW
Książka
Tytuł:
(review) A. Bronicki. Pierwsi pasterze III tysiąclecia p.Ch. Groby podgrupy wschodniolubelskiej kultury amfor kulistych. Obrządek pogrzebowy. Chronologia. [The first shepherds of the 3rd millennium B.C.]. Chełm 2021: Muzeum Ziemi Chełmskiej im. Wiktora Ambroziewicza w Chełmie, 284 pages
Autorzy:
Sieradzka, Elżbieta
Powiązania:
https://bibliotekanauki.pl/articles/38606169.pdf
Data publikacji:
2022
Wydawca:
Uniwersytet Rzeszowski. Instytut Archeologii Uniwersytetu Rzeszowskiego. Muzeum Okręgowe w Rzeszowie
Źródło:
Analecta Archaeologica Ressoviensia; 2022, 17; 111-112
2084-4409
Pojawia się w:
Analecta Archaeologica Ressoviensia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Leveraging Transfer Learning to Identify Food Categories
Autorzy:
Kolla, J. V. V.
Vemula, P. Ch.
Chakravarthy, S.
Naidu, B. S.
Patibandla, D.
Powiązania:
https://bibliotekanauki.pl/articles/2023418.pdf
Data publikacji:
2021
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
convolutional neural networks
transfer learning
domain similarity
fine-tuning
konwolucyjne sieci neuronowe
uczenie się przez przeniesienie
podobieństwo dziedzin
dostrajanie
Opis:
In today’s scenario, recognition of pictured food dishes automatically has significant importance. During the COVID-19 pandemic, there was a decline in people visiting restaurants for their dietary requirements. So many restaurants started offering their services online. This situation caused a demand for better categorization of food into various categories on a large scale by companies that facilitated these services. It is challenging to congregate a large dataset of food categories, so it is complex to build a generalized architecture. To solve this issue, In this paper, domain-specific transfer learning is used to build the model using some standard architectures like VGGNET, RESNET, and EFFICIENTNET family, which are trained on popular benchmark datasets such as IMAGENET, COCO, etc. The similarity between the source and target datasets is calculated to find the best source dataset, and the one with the highest similarity is chosen for transfer learning. The solution proposed in this paper outperforms some of the existing works on categorizing food items.
Źródło:
Advances in Science and Technology. Research Journal; 2021, 15, 4; 101-109
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An extended dynamic thermal model of a permanent magnet excited synchronous motor
Autorzy:
Mbo'o, Ch. P.
Hameyer, K.
Powiązania:
https://bibliotekanauki.pl/articles/140883.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
thermal modeling
thermal network
finite element method
iron losses
permanent magnet excited synchronous machine (PMSM)
Opis:
The purpose of this paper is to develop a dynamic thermal model of a permanent magnet excited synchronous motor (PMSM). The model estimates the temperature at specific points of the machine during operation. The model is implemented using thermal network theory, whose parameters are determined by means of analytical approaches. Usually thermal models are initialized and referenced to room temperature. However, this can lead to incorrect results, if the simulations are performed when the electrical machine operates under “warm” conditions. An approach is developed and discussed in this paper, which captures the model in critical states of the machine. The model gives feedback by online measured quantities to estimate the initial temperature. The paper provides an extended dynamic thermal model, which leads to a more accurate and more efficient thermal estimation.
Źródło:
Archives of Electrical Engineering; 2013, 62, 3; 375-386
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Funkcjonowanie powiązań leksykalnych u osób z chorobami neurodegeneracyjnymi. Dwa studia przypadków: pacjent z ataksją rdzeniowo-móżdżkową typu 1 (ang. SCA-1) oraz pacjent z chorobą Parkinsona (ch. P.)
Autorzy:
Jauer-Niworowska, Olga
Gatkowska, Izabela
Powiązania:
https://bibliotekanauki.pl/articles/36080444.pdf
Data publikacji:
2024
Wydawca:
Towarzystwo Kultury Języka
Tematy:
lingwistyka
psychologia
logopedia
diagnoza
terepia
funkcje wykonawcze
móżdżek
dyzartria
język
powiązania leksykalne
linguistics
psychology
speech therapy
diagnosis
therapy
executive functions
cerebellum
dysarthria
language
lexical associations
Opis:
Artykuł przedstawia różnice w poziomie funkcjonowania powiązań leksykalnych dwóch badanych (OB1 i OB2): OB1 – badany z ataksją rdzeniowo-móżdżkową typu 1 (SCA-1), OB2 – badany z chorobą Parkinsona (ch. P.). Metoda badania: badani podawali ustnie, bez limitu czasu skojarzenia do 63 bodźców słownych prezentowanych na ekranie komputera. Bodźce słowne pozyskano w badaniach eksperymentalnych Gatkowskiej (Gatkowska 2017). Realizacje nagrano na dyktafon cyfrowy Olympus 650, następnie zanalizowano lingwistycznie i psychologicznie. Wyniki: analiza psychologiczna – badani w normie intelektualnej (test Matryc Ravena), zaburzenia dyzartryczne, trudności w realizacji instrukcji. Analiza lingwistyczna: OB1 – przewaga relacji paradygmatycznych (hiponimii, meronimii, synonimii) nad syntagmatycznymi (trudność w budowaniu kontekstu), brak przyczynowości. OB2 ― bogatsze relacje paradygmatyczne (hiponimia, meronimia, synonimia, antonimia, komplementarność), relacje syntagmatyczne różnorodne. Wnioski: możliwe złożone podłoże zaburzeń językowych (dysfunkcje wykonawcze, emocjonalne), wyższy poziom funkcjonowania językowego OB2 niż OB1. Konieczne podejście interdyscyplinarne, holistyczne w postępowaniu diagnostyczno-terapeutycznym.
This article presents case studies of the relative ability of two subjects (OB1 and OB2) to make lexical associations; they have spinocerebellar ataxia type 1 and Parkinson’s disease, respectively. Test method: subjects gave associations (orally, with no time limit) to 63 verbal stimuli presented on a computer screen. Verbal stimuli were selected from Gatkowska’s experimental study (Gatkowska 2017). Responses were recorded on an Olympus 650 digital voice recorder, then analysed linguistically and psychologically. Results: psychological analysis – subjects within intellectual norm (Raven’s Matrices test), dysarthric disorder, difficulty in implementing instructions. Linguistic analysis: OB1 – predominance of paradigmatic relations (hyponymy, meronymy, synonymy) over syntagmatic relations (difficulty building context), lack of causality. OB2 – richer paradigmatic relations (hyponymy, meronymy, synonymy, antonymy, complementarity), syntagmatic relations diverse. Conclusions: possible complex background of anguage disorders (executive, emotional), higher level of language functioning of OB2 compared to OB1. The study illustrates the need for an interdisciplinary and holistic approach in diagnostic and therapeutic management.
Źródło:
Poradnik Językowy; 2024, 813, 4; 7-25
0551-5343
Pojawia się w:
Poradnik Językowy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Theoretical evaluation of ultrasonic velocities of binary liquid mixtures of 1-bromopropane in chlorobenzene at 303.15, 308.15, 313.15 and 318.15 K
Autorzy:
Babu, Ch. P.
Kumar, G. P.
Nagarjun, B.
Samatha, K.
Powiązania:
https://bibliotekanauki.pl/articles/412079.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
ultrasonic velocities
molecular interactions
1-bromopropane and chlorobenzene
Opis:
Theoretical velocities of binary liquid mixtures of 1-bromopropane with chlorobenzene at 2 MHz and four different temperatures 303.15, 308.15, 313.15 and 318.15 K, have been evaluated as a function of concentration and temperature. The experimental values are compared with theoretical models of liquid mixtures such as Nomoto, Van Dael-Vangeel, Impedance Relation, Rao’s Specific Velocity Method, Junjie’s relations and Free Length Theory. In the chosen system there is a good agreement between experimental and theoretical values calculated by Nomoto’s theory. The deviation in the variation of U2exp/ U2imx from unity has also been evaluated for explaining the non ideality in the mixtures. The results are explained in terms of intermolecular interactions occurring in these binary liquid mixtures.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2014, 11, 1; 9-17
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Acoustical studies of binary liquid mixtures of p-chlorotoluene in benzene at different temperatures
Autorzy:
Kumar, G. P.
Babu, Ch. P.
Samatha, K
Jyosthna, A. N.
Showrilu, K.
Powiązania:
https://bibliotekanauki.pl/articles/412275.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
ultrasonic velocity
thermodynamic parameters
p-chlorotoluene
molecular interactions
Opis:
Ultrasonic velocities (U), densities (ρ), and coefficient of viscosities (η) are measured for binary mixtures containing (i) p-chlorotoluene and (ii) benzene at 303.15 K, 308.15 K, 313.15 K and 318.15 K to understand the molecular interaction. Various acoustical parameters such as adiabatic compressibility (βad), free length (Lf), acoustic impedance (Z), free volume (Vf), molar volume (Vm), Rao’s constant (R), Wada’s constant (W) and internal pressure (πi), are calculated from the measured values of U, ρ, and η. The trend in acoustical parameters also substantiates to asses strong molecular interactions.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2014, 10; 25-37
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Some physical properties of ginko nuts and kernels
Autorzy:
Ch'ng, P.E.
Abdullah, M.H.R.O.
Mathai, E.J.
Yunus, N.A.
Powiązania:
https://bibliotekanauki.pl/articles/24875.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Opis:
Some data of the physical properties of ginkgo nuts at a moisture content of 45.53% (±2.07) (wet basis) and of their kernels at 60.13% (± 2.00) (wet basis) are presented in this paper. It consists of the estimation of the mean length, width, thickness, the geometric mean diameter, sphericity, aspect ratio, unit mass, surface area, volume, true density, bulk density, and porosity measures. The coefficient of static friction for nuts and kernels was determined by using plywood, glass, rubber, and galvanized steel sheet. The data are essential in the field of food engineering especially dealing with design and development of machines, and equipment for processing and handling agriculture products.
Źródło:
International Agrophysics; 2013, 27, 4
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Okamgnienie i ślad
The Blink of an Eye and a Trace
Autorzy:
Graf, Paweł
Powiązania:
https://bibliotekanauki.pl/articles/682858.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
category of trace
category of blink of an eye
guizzo
epiphany
void
Derrida
Husserl
Heidegger
Ricoeur
Tylor
kategoria śladu
kategoria okamgnienia
olśnienie
pustka
J. Derrida
E. Husserl
M. Heidegger
P. Ricoeur
Ch. Tylor
Opis:
The article contains an analysis of two philosophical concepts of trace and the blink of an eye. Referring to philosophy (by Derrida, Husserl, Harman, Heidegger, Ricoeur and Tylor), the author interprets the theme terms, confronting them against the thought within the theory of literature. The purpose is not, however, the indicated values as such, but their interpretative force, aimed at literary works. Texts by Calvin, Jasieński, Macsovszky, Schulz and Tabucchi are read with certain phenomena in mind (the blink of an eye, trace, epiphany and void), and the conclusion emphasises the value of paradoxical thinking.
Artykuł dokonuje analizy dwóch kategorii filozoficznych: śladu i okamgnienia. Odwołując się do filozofii (J. Derridy, E. Husserla, G. Harmana, M. Heideggera, P. Ricouera i Ch. Tylora) autor interpretuje tytułowe pojęcia, zderzając je z myślą teoretycznoliteracką. Celem nie są jednak wskazane jakości same w sobie, lecz ich moc interpretacyjna skierowana na utwory literackie. Lekturze (związanej z okamgnieniością i śladem, epifanią oraz pustką) zostały poddane teksty I. Calvina, B. Jasieńskiego, P. Macsovszky’ego, B. Schulza i A. Tabucchiego. W konkluzji zostaje podkreślona wartość myślenia paradoksalnego.
Źródło:
Czytanie Literatury. Łódzkie Studia Literaturoznawcze; 2017, 6; 99-114
2299-7458
2449-8386
Pojawia się w:
Czytanie Literatury. Łódzkie Studia Literaturoznawcze
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Controllable preparation of highly active horseradish peroxidase-gold nanoparticle bionanoconjugate
Autorzy:
Zhang, P.
Liu, Ch.
Song, S.
Peng, Ch.
Powiązania:
https://bibliotekanauki.pl/articles/778931.pdf
Data publikacji:
2012
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
horseradish peroxidase
gold nanoparticles
bionanoconjugate
Opis:
A novel method of immobilizing horse radish peroxidase enzyme (HRP) onto the surface of gold nanoparticles (GNPs) was developed. As a result, a high-activity bionanoconjugates was obtained through utilizing the biotin-streptavidin (SA) system. The HRP-SA-GNP bionanoconjugate with high activity was conveniently prepared through the biotin- avidin system. Compared with the HRP-GNP bioconjugate prepared through the traditional electrostatic absorption method, the enzyme activity per GNPs of this new bionanoconjugate was enhanced by 10 times. Moreover, the enzyme activity of this bionanoconjugate was controllable. The above method of bionanoconjugation preparation has promising applications In the fi elds including preparing highly active bio-nanoprobe and immobilized enzyme.
Źródło:
Polish Journal of Chemical Technology; 2012, 14, 4; 57-60
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
CO2-CH4 mixtures phase equilibrium analysis
Autorzy:
Dorosz, P.
Kopczyński, A.
Wojcieszak, P.
Powiązania:
https://bibliotekanauki.pl/articles/1818158.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
natural gas
mixtures
phase equilibrium
Opis:
Carbon dioxide removal is crucial step during natural gas processing, as CO2 is highly corrosive in presence of water. There are natural gas sources around the world with very high carbon dioxide content that cannot be developed. In order to design the effective CO2 removal process, properties of methane-carbon dioxide mixtures has to be determined. Authors have investigated thermodynamic properties of CH4-CO2 mixtures. Extended Peng-Robinson equations were used to determine the phase equilibrium of CH4-CO2 systems of different compositions.
Źródło:
Zeszyty Energetyczne; 2017, 4; 89--97
2658-0799
Pojawia się w:
Zeszyty Energetyczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Trente ans d’étude des langages du politique (1980-2010): Mots. Les langages du politique (numéro spécial) (Anna Dutka-Mańkowska)
Autorzy:
Bacot, P.
Coulomb-Gully, M.
Honoré, J.-P.
Le Bart, Ch.
Oger, C.
(coord.), Plantin Ch.
Powiązania:
https://bibliotekanauki.pl/articles/702238.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Źródło:
Kwartalnik Neofilologiczny; 2011, 1
0023-5911
Pojawia się w:
Kwartalnik Neofilologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Magnetization Relaxation in CdMnS
Autorzy:
Witowski, A. M.
Kutter, Ch.
Mac, W.
Wyder, P.
Powiązania:
https://bibliotekanauki.pl/articles/1929759.pdf
Data publikacji:
1993-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
76.30.Fc
Opis:
The static magnetization measurements and relaxation of magnetization data for two Cd$\text{}_{1-x}$Mn$\text{}_{x}$S samples with different composition are presented. The magnetization is described by the modified Brillouin function. The magnetization relaxation shows unusual composition dependence. This behavior is explained by cross-relaxation to the unknown fast relaxing centers introduced during growth.
Źródło:
Acta Physica Polonica A; 1993, 84, 4; 798-800
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Burnout syndrome impacts on quality of life in nursing professionals: The contribution of perceived social support
Autorzy:
Fradelos, E.
Mpelegrinos, S.
Mparo, Ch.
Vassilopoulou, Ch.
Argyrou, P.
Tsironi, M.
Zyga, S.
Theofilou, P.
Powiązania:
https://bibliotekanauki.pl/articles/1916393.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Medyczny w Białymstoku
Tematy:
burnout
quality of life
social support
nursing staff
Opis:
Purpose: To examine the impacts of burnout that has in health-related quality of life (QOL) in nursing staff in Greece. The association of social support with burnout and QOL is also investigated. Materials and methods: Individuals working in Mental and General Hospitals in the broader area of Athens participated in this study (N.139). The measurement tools include a) the Maslach Burnout Inventory (MBI), b) the SF-36 Health Survey and c. the Multidimensional Scale of Perceived Social Support. Burnout and QOL are expected to be related to the evaluation of social environment. Results: The results indicated the impacts that burnout has on quality of life and the positive effect of social support for nursing professionals in the levels of burnout. Conclusions: There is an association between burnout, quality of life and social support. Social support and socio-demographic factors appear to affect the levels of burnout to Psychiatric and General Hospital.
Źródło:
Progress in Health Sciences; 2014, 4, 1; 102-109
2083-1617
Pojawia się w:
Progress in Health Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nutritional habits in the elderly
Autorzy:
Kourkouta, L.
Ouzounakis, P.
Monios, A.
Iliadis, Ch.
Powiązania:
https://bibliotekanauki.pl/articles/1917821.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Medyczny w Białymstoku
Tematy:
diet
dietary habits
elderly
Opis:
Introduction: Aging is accompanied by several physiological and psychological changes in the organism of an individual (e.g., decreased sense of taste and smell, disruption of satiety, depression), which affect the nutritional intake. Purpose: The purpose of this retrospective study is to highlight the nutritional habits of elderly people. Materials and methods: Extensive review of the recent literature in electronic databases (Pub med, Google scholar) and journals. Exclusion criterion for the articles was the language than the Greek and English. Results: The increase life expectancy is important to be accompanied by physical and mental health, quality of life and, where possible, from participation in social, economic, cultural and spiritual life. Adopting healthy dietary patterns, combined with daily physical activity, and factors such as avoiding smoking, could help considerably in reaching these goals. The physical and psychological changes occurring during aging may adversely affect nutritional status. Instead, a proper diet can positively influence the physical and emotional state of elderly people. Conclusions: Diet and generally nutrition habits of the elderly play an important role in their health.
Źródło:
Progress in Health Sciences; 2016, 6(2); 155-159
2083-1617
Pojawia się w:
Progress in Health Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Artystyczne założenia tradycyjnego teatru koreańskiego p’ansori w ujęciu Sin Chae-hyo (1812-1884)
Artistic principles of the traditional Korean p’ansori theatre in Sin Chae-hyo(1812–1884)’s theory
Autorzy:
Rynarzewska, Ewa
Powiązania:
https://bibliotekanauki.pl/articles/577901.pdf
Data publikacji:
2020-05-28
Wydawca:
Polskie Towarzystwo Orientalistyczne
Tematy:
p’ansori
Korean theatre
Sin Chae-hyo
kwangdae
nŏ’rŭmsae
tŭg’ŭm
sasŏl ch’ire
inmul ch’ire
Opis:
The p’ansori performance represents one of the three main genres of traditional Korean theatre. It was presented by professional singers (kwangdae), who told an epic story taken from shamanic songs, folk stories and classic literature. P’ansori began to develop at the end of the 17th century and over the next two centuries was passed down in the oral tradition. Artistic practice was undermined in the second half of the 19th century by Sin Chae-hyo (1812-1884), who wrote down a few p’ansori and was the first to formulate its theoretical principles. He depicted four basic artistic components of p’ansori, including “acting talent” (nŏ’rŭmsae), “vocal talent” (tŭg’ŭm), “narrative talent” (sasŏl ch’ire) and “presence” (inmul ch’ire). Considered as key components, they were presented in the poetic work by Sin Chae-hyo, entitled Kwangdae ka (Song of the actor, around 1875). The main purpose of this article is to identify and define the components that constitute the artistic essence of p’ansori theatre.
Źródło:
Przegląd Orientalistyczny; 2019, 3-4(271-272); 275-292
0033-2283
Pojawia się w:
Przegląd Orientalistyczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
AIDS and nutrition in patients
Autorzy:
Kourkouta, L.
Monios, A.
Iliadis, Ch.
Ouzounakis, P.
Powiązania:
https://bibliotekanauki.pl/articles/1918438.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Medyczny w Białymstoku
Tematy:
AIDS
nutrition
immune system infection
immunosuppressant
Opis:
Introduction: AIDS is a viral infection that particularly affects the nutritional status of patients by complicating the absorption of nutrients and their metabolism. Purpose: The purpose of this retrospective study is to highlight the contribution of nutrition to the wellness of people with HIV in all stages of the disease. Review Methods: The methodology used to select the information used in this study includes review studies and research in leading databases such as PUBMED, MEDLINE, and IATROTEK. The selection criterion of the articles was the Greek and English language.Results: The real goal of the nutritional assessment of patients with AIDS is to improve their ability to consume a sufficient quantity and variety of foods in order to meet their nutritional needs. The evaluation of dietary intake assesses the adequacy of food and nutrients consumed. It includes assessing the dietary patterns, frequency of meals, and the factors that affect food choice. Conclusions: Maintaining a good nutritional status has a significant impact on the functioning of the immune system and the overall health of people living with HIV / AIDS.
Źródło:
Progress in Health Sciences; 2017, 7(1); 182-186
2083-1617
Pojawia się w:
Progress in Health Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Vision problems in children - a review
Autorzy:
Kourkouta, L.
Frantzana, E.
Iliadis, Ch.
Ouzounakis, P.
Monios, A.
Powiązania:
https://bibliotekanauki.pl/articles/1918528.pdf
Data publikacji:
2017-11-12
Wydawca:
Uniwersytet Medyczny w Białymstoku
Tematy:
vision problems
children
Opis:
Introduction: A vision problem is a condition which involves not only visual difficulty but also blindness. Purpose: The purpose of this short review study is the early recognition of vision problems in children, the proper treatment as well as their prevention. Materials and methods: The material of the study has been recent articles on the subject that have been found mainly in the electronic database Medline, (HEAL-Link), with the following keywords: children, vision impairment, blindness, treatment, prevention. Review: A high risk group of individuals that frequently presents ophthalmic severe lesions leading to blindness consists of children with prenatal and perinatal adverse effects. Conclusions: Education gives the opportunity of co-existence between the blind and people who are able to see. This is the path to social inclusion of individuals with vision problems. Moreover, it is estimated these two groups would have more points in common than differences between them through this experience.
Źródło:
Progress in Health Sciences; 2017, 7(2); 80-84
2083-1617
Pojawia się w:
Progress in Health Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Anorexia nervosa: A literature review
Autorzy:
Iliadis, Ch.
Frantzana, A.
Ouzounakis, P.
Kourkouta, L.
Powiązania:
https://bibliotekanauki.pl/articles/1918943.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Medyczny w Białymstoku
Tematy:
Anorexia nervosa
health problems and treatment.
Opis:
Introduction: Anorexia nervosa is a food intake disorder characterized by acute weight loss that it could cause severe psychosomatic problems. Purpose: To present the data and information as well as the treatment related to Anorexia nervosa. Materials and methods: The study material consisted of reviewed articles on the topic found in Greek and globally accepted electronic databases, Pubmed, Scopus, Medline, Google Scholar, regarding the effects of Anorexia nervosa on health and its treatment. Results: Initial symptoms of Anorexia nervosa and Bulimia Nervosa may be characterised by body-related negative interpretation bias, distorted body image and pronounced body dissatisfaction. Anorexic patients refuse to eat with their family or in public places. They lose weight by drastically reducing their total food intake, with a disproportionate reduction in the amount of meals containing carbohydrates and fats. The term Anorexia is unfortunate, because a decrease in appetite does not occur. Patients are constantly hungry and they are constantly thinking about food, but they refuse it. An indication of their way of thinking is that they often collect recipes or prepare complex meals for others. Conclusions: Anorexia nervosa is a disease that connects the physical with the mental dimension of health. A person's disharmonious relationship with oneself, which may have its roots in a dysfunctional family context or in a demanding and competitive social environment, finds the way to be manifested through the individual's reflection on food.
Źródło:
Progress in Health Sciences; 2020, 10(2); 74-79
2083-1617
Pojawia się w:
Progress in Health Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of iodine determination in spinach using 2% CH3COOH and TMAH
Porównanie oznaczenia jodu w szpinaku za pomocą 2% CH3COOH oraz TMAH
Autorzy:
Smoleń, S.
Strzetelski, P.
Rożek, S.
Ledwożyw-Smoleń, I.
Powiązania:
https://bibliotekanauki.pl/articles/11541993.pdf
Data publikacji:
2011
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Opis:
Tetramethylammonium hydroxide (TMAH) is the compound most commonly applied for iodine determination in environmental samples but, at the same time, is very harmful for human health when used as an analytical reagent. For that reason, it is desirable to seek for alternative, equally rapid and easy-to-perform (but requiring less hazardous chemicals) methods of iodine analysis in environmental samples on the same detection level. The aim of the research was to assess the applicability of iodine determination in spinach after incubation of plant samples with 2% acetic acid in comparison with standard analytical procedure using solution of TMAH (tetramethylammonium hydroxide). Studies were conducted on spinach samples from two vegetation experiments carried out in pots and field including soil fertilization and foliar application of diverse iodine doses in the form of KI and KIO3. Obtained results indicated a relatively high usefulness of sample incubation with 2% acetic acid for iodine determination in spinach plants. Still, the statistical significance of the relation (defined with the use of correlation coefficients) between iodine content determined in TMAH (x variable) and 2% acetic acid (y variable) was primarily influenced by iodine form, dose and method of its application during plant cultivation. In the pot experiment, values of correlation coefficients between tested variables were statistically significant and equal to r = 0.66. In the field study, values of correlation coefficients (between x and y variables) for plants with foliar application of KI and KIO3 were statistically significant and equal to r = 0.99 and r = 1.00, respectively. Combined comparative analysis of data obtained in both experiments revealed that correlation between tested variables was statistically significant and its coefficient was equal to r = 0.80. Mean iodine recovery from fortified samples after incubation with 2 % acetic acid was 91.1% ±17.7% (n = 15), whereas using TMAH – 89.3% ±30.7 (n = 15).
Najczęściej do oznaczenia jodu w próbach środowiskowych wykorzystuje się tetrametyloaminę (TMAH) –związek szkodliwy dla zdrowia i życia człowieka. Dlatego też otwartą kwestią jest poszukiwanie innych, równie szybkich i łatwych do wykonania (ale mniej szkodliwych dla zdrowia człowieka niż TMAH) metod umożliwiających porównywalne oznaczenie jodu w próbach środowiskowych. Celem badań było określenie przydatności oznaczenia jodu w szpinaku po inkubacji prób z 2% kwasem octowym w porównaniu do standardowej procedury analitycznej z TMAH (tetramethylammonium hydroxide). Badaniami objęto próby szpinaku z dwóch doświadczeń wegetacyjnych (wazonowego i polowego) obejmujących zróżnicowane pod względem dawki nawożenie doglebowe i dokarmianie dolistne roślin jodem w formie KI i KIO3. Badania wykazały stosunkowo dobrą przydatność inkubacji prób z 2% kwasem octowym do oznaczania zawartości jodu w szpinaku. Jednakże na statystyczną istotność zależności (współczynników korelacji), pomiędzy zawartością jodu oznaczanego w TMAH (zmienna x) i w 2% kwasem octowym (zmienna y), decydujący wpływ miała forma, dawka i sposób aplikacji jodu podawanego roślinom w czasie uprawy. W doświadczeniu wazonowym wartość współczynnika korelacji pomiędzy zmiennymi była statystycznie istotna i wynosiła r = 0,66. W doświadczeniu polowym wartości współczynników korelacji (pomiędzy zmienną x i y) dla grupy roślin dokarmianych dolistnie KI oraz KIO3 były statystycznie istotne i wynosiły odpowiednio r = 0,99 i r = 1,00. Łączna analiza porównawcza dla danych z obydwu doświadczeń wykazała, że współczynnik korelacji pomiędzy zmienną x i y był istotny statystycznie i wynosił r = 0,80. Średni odzysk jodu z prób fortyfikowanych po inkubacji z 2% kwasem octowym wyniósł 91,1% ±17,7% (n = 15), a po inkubacji z TMAH kształtował się na poziomie 89,3% ±30,7 (n = 15).
Źródło:
Acta Scientiarum Polonorum. Hortorum Cultus; 2011, 10, 3; 29-38
1644-0692
Pojawia się w:
Acta Scientiarum Polonorum. Hortorum Cultus
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Magnetism and Crystal Field in PrCuAl₃ and NdCuAl₃
Autorzy:
Novák, P.
Diviš, M.
Powiązania:
https://bibliotekanauki.pl/articles/1032630.pdf
Data publikacji:
2017-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.15.Mb
71.20.Lp
71.70.Ch
Opis:
During the last five years we developed method to calculate crystal field and magnetism of rare-earth ions in solids. The method is fully ab initio with the exception of a single parameter which adjust the position of f states relative to other valence states and it was successfully applied in insulating systems. In this contribution the method is used to explain multiplet splitting and magnetism in PrCuAl₃ and NdCuAl₃ intermetallics. For the Nd compound the agreement between theory and experiment is good, while for the PrCuAl₃ the agreement is less satisfactory which can be due to the more delocalized 4f electrons of Pr³⁺ comparing to Nd³⁺ ion.
Źródło:
Acta Physica Polonica A; 2017, 131, 4; 964-966
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nurses’ perceptions about the transformational leadership in psychiatric hospitals in Cyprus
Autorzy:
Florentzou, P.
Myrofora, Ch.
Lavdaniti, M.
Sapountzi-Krepia, D.
Krepia, V.
Prezerakos, P.
Powiązania:
https://bibliotekanauki.pl/articles/1918785.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Medyczny w Białymstoku
Tematy:
Nurses
transformational leadership
perceptions
Opis:
Purpose: To assess nurses’ perceptions about the transformational leadership applied in psychiatric hospitals and to investigate factors that influence these perceptions. Materials and methods: A descriptive study was conducted in a psychiatric hospital and a psychiatric ward of a general hospital located in a city of Cyprus. A convenience sample of 95 nurses was used, while the Greek version of the « Kuopio University Hospital Transformational Leadership Scale (KUHTLS) questionnaire was used as an instrument. Results: Appreciation, decision making fairness, and individuality were the variables with the highest mean values. Women had significantly higher scores in appreciation, justice, and individuality compared to men. Nurses who were >45 years old had a significantly higher score compared to those who were 31-45 and <30 years old in the subscales decision making (p=0.005), appreciation (p=0.043), development (p=0.020), work efficiency and outcomes (p=0.030). Head and senior nurses had significantly higher scores regarding subscales decision making (p=0.003), appreciation (p=0.025), development (p=0.010), work efficiency and outcomes (p=0.004). Nurses with > 7 years of work experience, had significantly higher scores in fairness subscale compared with the nurses who had less than seven years of work experience (p=0.034). Conclusions: Nurses working in those psychiatric hospitals and ward had positive perceptions about transformational nursing leadership. Hospital administrators should facilitate training programs for nurse managers in leadership styles and their effects on job satisfaction.
Źródło:
Progress in Health Sciences; 2018, 8(2); 18-24
2083-1617
Pojawia się w:
Progress in Health Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Natural Processes in Mitigation of CO2 and CH4 Emission
Procesy naturalne redukujące emisję CO2 i CH4
Autorzy:
Czechowska-Kosacka, A.
Lubańska, Z.
Dragan, P.
Powiązania:
https://bibliotekanauki.pl/articles/1818039.pdf
Data publikacji:
2016
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
carbon dioxide
methane
emission
absorption
ditlenek węgla
metan
emisja
absorpcja
Opis:
W pracy scharakteryzowano emisję CO2 i CH4 oraz ich wpływ na efekt cieplarniany. Omówiono przepływy pomiędzy ekosystemami Ziemi. Szczególna uwagę zwrócono na naturalne metody usuwania CO2 przez uprawy rolnicze na przykładzie powiatu bialskiego. Omówienie redukcji ograniczono do redukcji jego emisji z wysypisk.
Źródło:
Rocznik Ochrona Środowiska; 2016, Tom 18, cz. 2; 1039-1048
1506-218X
Pojawia się w:
Rocznik Ochrona Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Temperature on the Magneto-Dielectrics Effect of Oil-Based Ferrofluid
Autorzy:
Kúdelčík, J.
Hardoň, Š.
Bury, P.
Timko, M.
Kopčanský, P.
Powiązania:
https://bibliotekanauki.pl/articles/1030417.pdf
Data publikacji:
2018-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
47.65.Cb
77.22.Gm
77.22.Ch
Opis:
The effect of temperature on the magneto-dielectrics behavior was studied by dielectric spectroscopy in the transformer oil-based ferrofluid with magnetic nanoparticles upon the effect of an external magnetic field. The frequency dependence of complex permittivity and dissipation factor were measured within the frequency range from 1 mHz to 10 kHz at different temperatures by a capacitance method. The dielectrics parameters were measured as a function of the external magnetic field in the range of 0-200 mT, parallel to the direction of the electric field as a function of temperature in the range of 15-35°C. The interaction between magnetic field and magnetic moments of nanoparticles led to the aggregation of magnetic nanoparticles to new structures which had influence on dielectric parameters. The dependence of these parameters at constant magnetic field on angle between the direction of the electric and magnetic fields (anisotropy) has been measured, too.
Źródło:
Acta Physica Polonica A; 2018, 133, 3; 483-485
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dielectric Study of Pressure Induced fcc-sc Phase Transition in Fullerene C$\text{}_{60}$
Autorzy:
Trybuła, Z.
Krupski, M.
Powiązania:
https://bibliotekanauki.pl/articles/2014286.pdf
Data publikacji:
2000-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
74.70.Wz
62.50.+p
64.70.-p
77.22.Ch
Opis:
Phase transition in polycrystalline fullerene C$\text{}_{60}$ from fcc phase to a simple cubic phase sc induced by hydrostatic pressure up to 0.5GPa was studied by dielectric method. Pressure coefficient dT$\text{}_{c}$/dp=144±8 K/GPa was determined. This value is consistent with pressure coefficients obtained with other experimental techniques.
Źródło:
Acta Physica Polonica A; 2000, 98, 4; 389-392
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Scanning Tunneling Spectroscopy Sensitive to Layer Structure of BSCCO
Autorzy:
Aleszkiewicz, M.
Aleszkiewicz, P.
Raułuszkiewicz, J.
Powiązania:
https://bibliotekanauki.pl/articles/1963289.pdf
Data publikacji:
1997-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.16.Ch
68.65.+g
74.72.Hs
Opis:
Scanning tunneling microscopy images and scanning tunneling spectroscopy characteristics were measured at 4.2 K in liquid helium bath on the cleaved in air a-b surface of Bi$\text{}_{2}$Sr$\text{}_{2}$CaCu$\text{}_{2}$O$\text{}_{8}$ (BSCCO-2212). Electronic densities of states and superconductivity parameters Δ and Γ evaluated from dI/dV characteristics depend on tip-sample distance s: with shortening of the distance s superconducting gap structure becomes more distinct, i.e. Δ increases and Γ decreases. We explain this phenomenon as a non-vacuum tunneling, where for longer s tunneling electrons reach only the surface contamination layer on non-metallic BiO top-surface layer, whereas for shorter s tunneling electrons penetrate also deeper lying CuO layers reflecting their superconducting properties. The dependence of Δ on s is evaluated. This result allows to understand better the non-vacuum scanning tunneling microscopy imaging: by adjusting properly the tip-sample distance one can select suitable local density of states contributing dominantly to the scanning tunneling microscopy images taken on BSCCO.
Źródło:
Acta Physica Polonica A; 1997, 91, 3; 597-604
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Earn-outs to bridge gap between negotiation parties – curse or blessing?
Autorzy:
Toll, Ch.
Rolinck, J.-P.
Powiązania:
https://bibliotekanauki.pl/articles/108376.pdf
Data publikacji:
2017
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
mergers and acquisitions
asymmetric information problem
earn-out
Opis:
An agreement upon the terms of company transactions is aggravated by the existence of differ-ent information levels concerning the negotiation parties; this can be seen as a basic cause for divergent price expectations. Hence, the question is how the existing differences in price expectations of the transaction parties can be handled to reach a consensus, even when there is no area of agreement in the initial round of negotiations. Earn-outs are an interesting approach in overcoming divergent price expectations by making the purchase price dependent on the future performance of the company. However, formulating and implementing earn-outs may have a substantial potential for conflict. The present contribution shows which advantages and disadvantages the transaction parties face if an agreement regarding earn-outs is made.
Źródło:
Managerial Economics; 2017, 18, 1; 103-116
1898-1143
Pojawia się w:
Managerial Economics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synergiczny wpływ wymiaru nanoporów węgla aktywnego oraz utlenienia jego powierzchni na adsorpcję CO2 z mieszanin CH4/CO2
Synergetic Influence of Carbon Nanopore Size and Surface Oxidation on CO2 Adsorption from CO2/CH4 Mixtures
Autorzy:
Furmaniak, S.
Terzyk, A. P.
Gauden, P. A.
Kowalczyk, P.
Harris, P. J. F
Powiązania:
https://bibliotekanauki.pl/articles/297271.pdf
Data publikacji:
2013
Wydawca:
Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:
wychwyt CO2
separacja adsorpcyjna
utlenione materiały węglowe
symulacje Monte Carlo
CO2 capture
adsorptive separation
oxidized carbonaceous materials
Monte Carlo simulations
Opis:
W związku z rosnącym znaczeniem metanu jako paliwa rozdział mieszaniny CH4 i CO2 jest procesem ważnym z praktycznego punktu widzenia, ponieważ CO2 stanowi częstą domieszkę zarówno naturalnego gazu ziemnego, jak i biogazu. Jedną ze stosowanych w tym celu metod jest technika pressure swing adsorption, bazująca na różnicach w adsorpcji składników mieszaniny. Wśród stosowanych adsorbentów ważne miejsce zajmują węgle aktywne. Ponieważ pomiary doświadczalne adsorpcji mieszanin gazów są czasochłonne i wymagają zaawansowanej aparatury, symulacje komputerowe mogą stanowić prostszą i szybszą alternatywę. W pracy przedstawiono wyniki zastosowania symulacji Monte Carlo w wielkim zespole kanonicznym do modelowania adsorpcji i rozdziału mieszaniny CH4/CO2 na węglach aktywnych. Wykorzystano model węgla zaproponowany przez Harrisa i innych. Analizowano wpływ zarówno systematycznie zmieniającej się porowatości węgla, jak i obecności na jego powierzchni różnych ilości grup tlenowych. Wykazano, że oba czynniki wpływają na rozdział mieszaniny CH4/CO2. Spośród nich to utlenienie powierzchni węgla jest czynnikiem bardziej istotnym. Podczas gdy zwiększenie odsetka małych mikroporów (o średnicy poniżej 1 nm) pozwala na zwiększenie skuteczności rozdziału o kilkadziesiąt procent, to wprowadzenie grup karbonylowych prowadzi nawet do 2-3-krotnego wzrostu wartości równowagowego współczynnika rozdziału. Węgiel optymalny do rozdziału mieszaniny CH4/CO2 powinien nie tylko posiadać odpowiednio małe pory, ale również zawierać możliwie dużo grup powierzchniowych.
The growing importance of methane as a fuel makes the separation of CH4 and CO2 mixtures an important process from a practical point of view. CO2 is a frequent impurity of natural gas and biogas. The pressure swing adsorption (PSA) technique is one of the methods used in practice to separate gas mixtures. This method is based on the differences in adsorption of mixture components. Activated carbons are important adsorbents used in the PSA process. Since experimental measurements of gas mixtures adsorption are time-consuming and require sophisticated equipment, computer simulations may be a simpler and faster alternative. The current work presents the results of the use of Monte Carlo simulations in grand canonical ensemble for modelling the adsorption and separation of CH4/CO2 mixture on activated carbons. The model of carbons proposed by Harris et al. is used. The influence of both the carbon porosity (systematically changing) and the presence of surface oxygen groups is analysed. The results show that the both factors affect the separation of CH4/CO2 mixture. Among them, the oxidation of carbon surface is a far more important factor. While the increase in percentage of the smallest micropores (having a diameter below 1 nm) makes it possible to increase separation efficiency by a few tens of percent, the introduction of carbonyl groups results even in 2-3 times greater value of the equilibrium separation factor. The optimal carbon for separation of CH4/CO2 mixtures should not only contain the appropriate small pores, but it should also have the high concentration of surface functionalities.
Źródło:
Inżynieria i Ochrona Środowiska; 2013, 16, 2; 245-254
1505-3695
2391-7253
Pojawia się w:
Inżynieria i Ochrona Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
DC Magnetic Properties of Amorphous Vitrovac Ribbon
Autorzy:
Kollár, P.
Birčáková, Z.
Füzer, J.
Kuźmiński, M.
Powiązania:
https://bibliotekanauki.pl/articles/1031042.pdf
Data publikacji:
2017-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.60.Jk
75.60.Ch
75.60.Ej
Opis:
Soft magnetic amorphous Co-based materials prepared by rapid quenching method in the form of thin ribbon are well-known due to their excellent soft magnetic properties as high permeability, low coercivity, and low magnetic losses in kHz range. The amorphous Co-Fe-B-Si material Vitrovac® 6155 U55 produced by Vacuumschmelze GmbH & Co. KG belongs to this class of materials and was investigated in as-delivered state. The aim of this work was to study DC magnetization process by various experimental methods. We have measured magnetization curve by fluxmeter based hysteresis graph and hysteresis loops by three different fluxmeter based hysteresis graphs, exhibiting significant differences. The first and the second hysteresis graph perform the hysteresis loops measurement by the point-by-point method, either with commutative or with summing steps. The third one is AC hysteresis graph working at very low frequencies down to 7 mHz, performing the continuous method. The explanation of this result is based on the structural after effect influencing the domain wall displacement. We assumed that the domain structure consists of very small number of domain walls responsible for magnetization process, which was confirmed by the visualization of static domain structure by a computer-controlled setup based on the Kerr effect.
Źródło:
Acta Physica Polonica A; 2017, 131, 4; 675-677
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multiferroic Cobalt Ferrite-Lead Iron Tungstate Composites
Autorzy:
Kulawik, J.
Szwagierczak, D.
Guzdek, P.
Powiązania:
https://bibliotekanauki.pl/articles/1490917.pdf
Data publikacji:
2012-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.-y
75.60.Ej
75.85.+t
77.22.Ch
Opis:
The paper presents dielectric, magnetic and magnetoelectric properties of multiferroic bulk composites based on $CoFe_2O_4$ ferrite and $Pb(Fe_{2//3}W_{1//3})O_3$ relaxor. X-ray diffraction analysis and scanning electron microscopy observations of ceramic samples revealed two-phase composition and fine grained microstructure with uniformly distributed ferromagnetic and ferroelectric phases. Dielectric permittivity measured in a temperature range 218-773 K at frequencies of 10 Hz-2 MHz exhibits high and broad maxima attributed to dielectric relaxation. The hysteresis determined in a temperature range 4-393 K for magnetic field changing from - 80 kOe to 80 kOe is typical of hard magnetic materials. Saturation magnetizations and coercivities were found to decrease with increasing temperature. The courses of zero field cooled and field cooled magnetization versus temperature curves measured in the temperature range 4-393 K imply spin glass behavior of the ferrite and antiferromagnetic transition of the relaxor at low temperatures. The ferrite-relaxor composite shows high magnetoelectric voltage coefficient which distinctly increases with increasing frequency of ac magnetic field and is slightly higher for higher ac and dc magnetic fields.
Źródło:
Acta Physica Polonica A; 2012, 121, 1; 122-124
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nanostructuring and Hardness Investigations of Thin Films by Scanning Force Microscopy
Autorzy:
Nowicki, M.
Richter, A.
Ries, R.
Oszwałdowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/1968828.pdf
Data publikacji:
1998-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.16.Ch
68.35.-p
Opis:
The scanning force microscope was used to scratch thin films and to write nanoscale pattern on surfaces as well as to perform nanoindentation for hardness measurements. Different thin film materials such as C$\text{}_{60}$ films, diamond-like carbon, metals and semiconducting films have been investigated.
Źródło:
Acta Physica Polonica A; 1998, 93, 2; 437-441
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Toxicity of bisphenol a on humans: a review
Autorzy:
Preethi, S.
Sandhya, K.
Lebonah, D.E.
Prasad, Ch.V.
Sreedevi, B.
Chandrasekhar, K.
Kumari, J.P.
Powiązania:
https://bibliotekanauki.pl/articles/11618.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Opis:
Bisphenol A (BPA) is a plastic ingredient produced in large quantities for use primarily in the production of polycarbonate plastics and epoxy resins. The present review focused on different mechanisms of BPA on human health in enzymatic, androgenic, neurological, liver and reproductive systems. The review explained the influence of BPA on different stages of human life likely in foetal stage, children and adults stages. The review also concentrated on how to handle BPA, treatment, preventive measures against BPA exposure.
Źródło:
International Letters of Natural Sciences; 2014, 22
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spin-Lattice Relaxation Beyond the Debye Approximation
Autorzy:
Witowski, A. M.
Bardyszewski, W.
Kutter, Ch.
Wyder, P.
Witkowska, B.
Mycielski, A.
Powiązania:
https://bibliotekanauki.pl/articles/1877052.pdf
Data publikacji:
1995-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
76.30.Fc
63.20.Dj
Opis:
In this paper we present the results of magnetization relaxation in HgCdMnTe at high magnetic fields. In this mixed crystal the TA phonons have an energy lower than the spin splitting of the Mn^{2+} ground orbital singlet at about 20 T, which allows to check the effect of phonons with wave vectors from the edges of the Brillouin zone on the spin-lattice relaxation.
Źródło:
Acta Physica Polonica A; 1995, 87, 2; 533-535
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Magnetocrystalline Anisotropy of Tb$\text{}_{1.1}$(FeCo)$\text{}_{11}$Ti
Autorzy:
Ivanova, T. I.
Pankratov, N. Yu.
Pastushenkov, Yu. G.
Skokov, K. P.
Powiązania:
https://bibliotekanauki.pl/articles/2013699.pdf
Data publikacji:
2000-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.60.Ch
Opis:
The Tb$\text{}_{1.1}$Fe$\text{}_{11-x}$Co$\text{}_{x}$Ti (x = 0, 1, 2, 3, 4) compounds with the ThMn$\text{}_{12}$-type structure were studied by using the torque and magnetization measurements in order to investigate temperature and composition behavior of the magnetocrystalline anisotropy. The Tb$\text{}_{1.1}$(FeCo)$\text{}_{11}$Ti single crystals demonstrated spin reorientation transition from easy axis to easy plane with the decrease in temperature. The substitution of Co for Fe produces an enhancement of the Curie temperatures, decreases temperatures of spin reorientation transition and appearance of canted structure.
Źródło:
Acta Physica Polonica A; 2000, 97, 5; 847-850
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Vertical distribution of nearshore flow velocity
Autorzy:
Li, Ch.
Fu, X.
Li, R.
Dai, L.
Chen, P.
Powiązania:
https://bibliotekanauki.pl/articles/259609.pdf
Data publikacji:
2016
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
vertical distribution of flow velocity
Jiangsu Sea
nearshore
exponential formula
Opis:
In this paper, a new exponential formed vertical distribution of nearshore flow velocity is constructed, which is simpler in form and more suitable for engineering application. The physical meaning of the new formula is more specific than that of Soulsby. Compared with those logarithmic formed ones, the new one does not need the maximum velocity and only needs the mean velocity in vertical, which gives it better engineering practicability. Apply the new formula to Jiangsu coastal area and compare the results with that of Soulsby whose results show the new formula agrees better with the measured flow velocity, which reasonably reflects the basic principles of vertical distribution of flow velocity.
Źródło:
Polish Maritime Research; 2016, S 1; 104-108
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rafał Stankiewicz, Model racjonalizacji dostępu do produktu leczniczego. Zagadnienia publicznoprawne, C.H. Beck, Warszawa 2014, ss. 537
Rafał Stankiewicz, Model racjonalizacji dostępu do produktu leczniczego. Zagadnienia publicznoprawne [Rationalization model of access to medical products], C.H. Beck, Warszawa 2014, p. 537; review by Andrzej Powałowski
Autorzy:
Powałowski, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/508530.pdf
Data publikacji:
2017-03-31
Wydawca:
Uniwersytet Warszawski. Wydawnictwo Naukowe Wydziału Zarządzania
Źródło:
internetowy Kwartalnik Antymonopolowy i Regulacyjny; 2017, 6, 1; 181-183
2299-5749
Pojawia się w:
internetowy Kwartalnik Antymonopolowy i Regulacyjny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Direct Observation of Localized Modes in an Open Disordered Microwave Cavity
Autorzy:
Mortessagne, F.
Laurent, D.
Legrand, O.
Sebbah, P.
Vanneste, Ch.
Powiązania:
https://bibliotekanauki.pl/articles/2047826.pdf
Data publikacji:
2007-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.25.Dd
72.15.Rn
Opis:
We present measurements of the spatial intensity distribution of localized modes in a two-dimensional open microwave cavity randomly filled with cylindrical dielectric scatterers. The robustness of these modes with respect to a modification of the boundaries of the scattering region is successfully established. From a comparison with numerically calculated modes, we can extract precise values of the localization length which are in agreement with the measured spectral widths. These results constitute unambiguous signatures of the existence of strongly localized electromagnetic modes in two-dimensional open random media.
Źródło:
Acta Physica Polonica A; 2007, 112, 4; 665-672
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Jochen Musch, Karl Ch. Klauer (red.), The psychology of evaluation. Affective processes in cognition and emotion, Mahwah, NJ–London: Lawrence Erlbaum Associates, Pub. 2003
Autorzy:
Bartczuk, Rafał P.
Powiązania:
https://bibliotekanauki.pl/articles/2128993.pdf
Data publikacji:
2019-03-27
Wydawca:
Katolicki Uniwersytet Lubelski Jana Pawła II. Towarzystwo Naukowe KUL
Źródło:
Roczniki Psychologiczne; 2006, 9, 2; 125-130
1507-7888
Pojawia się w:
Roczniki Psychologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Oxidation Studies of the Graphite Surface by Scanning Tunneling Microscopy and Photoelectron Spectroscopy
Autorzy:
Klusek, Z.
Phaner, M.
Krapf, P.
Porte, L.
Powiązania:
https://bibliotekanauki.pl/articles/1931811.pdf
Data publikacji:
1994-12
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.16.Ch
33.60.Fy
Opis:
Scanning tunneling microscopy and spectroscopy and X-ray photoelectron spectroscopy were used to study oxidation effects of nitric acid on highly oriented pyrolytic graphite surface. This treatment was performed at different temperatures and etching times with the aim of realizing local binding sites on the surface without creating deep defects. Then these three technics were found in good agreement to characterize the weakly oxidized surface. A wavy structure different from pure graphite at atomic scale was imaged by scanning tunneling microscopy. This modification was correlated to the presence of carboxylic groups on the surface revealed by X-ray photoelectron spectroscopy. Both spectroscopies of scanning tunneling and X-ray photoelectron demonstrated the vanishing of π bands characteristic from sp$\text{}^{2}$ graphitic hybridization. This was attributed to dehybridization corresponding to new bondings of the graphite carbons in the carboxylic groups.
Źródło:
Acta Physica Polonica A; 1994, 86, 6; 947-954
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Current-Induced Spin Accumulation and Spin Transfer Torque in a Néel Domain Wall
Autorzy:
Baláž, P.
Szymczyk, Ł.
Dugaev, V.
Barnaś, J.
Powiązania:
https://bibliotekanauki.pl/articles/1427608.pdf
Data publikacji:
2012-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.60.Ch
75.70.Cn
Opis:
Current-induced spin accumulation in a domain wall and the associated spin torque exerted on the wall are analyzed theoretically. The considerations are limited to a relatively thick Néel domain wall in a bulk ferromagnetic metal. The current-induced spin density is calculated using the linear response theory and the Green function formalism.
Źródło:
Acta Physica Polonica A; 2012, 121, 5-6; 1210-1212
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
High Pressure Raman Spectroscopy in Carbon Nanotubes
Autorzy:
Kourouklis, G.
Arvanitidis, J.
Christofilos, D.
Ves, S.
Powiązania:
https://bibliotekanauki.pl/articles/1807795.pdf
Data publikacji:
2009-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.67.Ch
78.30.Na
63.22.-m
62.50.-p
Opis:
This work focuses on the high pressure Raman study of carbon nanostuctures comprising of single- or double-wall carbon nanotubes. The detailed examination of the Raman peaks, especially those attributed to the radial breathing modes of the carbon nanotubes, as a function of pressure provides a wealth of information concerning the pressure response of individual nanotubes as well as the internal-external tube (intratube) interactions. The radial breathing modes of both the internal and the external tubes in double-wall carbon nanotubes show reduced pressure slope values as compared to the corresponding in single-wall carbon nanotubes. The reduced slopes for the internal tubes reflect the pressure screening effect inside the external tubes, while those for the external tubes their structural reinforcement due to the encapsulation of smaller diameter tubes in their interior. Moreover, the magnitude of the pressure screening effect depends strongly on the intratube spacing and thus on the intratube interaction. All the experimental observations are well reproduced qualitatively by means of theoretical calculations based on a simple phenomenological model.
Źródło:
Acta Physica Polonica A; 2009, 116, 1; 13-18
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Early detection of bearing damage by means of decision trees
Autorzy:
Kilundu, B.
Dehombreux, P.
Letot, Ch.
Chiementin, X.
Powiązania:
https://bibliotekanauki.pl/articles/384675.pdf
Data publikacji:
2009
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
damage detection
bearing damage
envelope detection
decision trees
preventive maintenance
Opis:
This paper presents a procedure for early detection of rolling bearing damages on the basis of vibration measurements. First, an envelope analysis is performed on bandpass filtered signals. For each frequency range, a feature indicator is defined as sum of spectral lines. These features are passed through a principal component model to generate a single variable, which allows tracking change in the bearing health. Thresholds and rules for early detection are learned thanks to decision trees. Experimental results demonstrate that this procedure enables early detection of bearing defects.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2009, 3, 3; 70-74
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Specific Heat of Cr-Based Semimagnetic Semiconductors
Autorzy:
Twardowski, A.
Eggenkamp, P.
Mac, W.
Swagten, H. J. M.
Demianiuk, M.
Powiązania:
https://bibliotekanauki.pl/articles/1929660.pdf
Data publikacji:
1993-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.Pp
71.70.Ch
71.70.Ej
Opis:
Specific heat of ZnCrSe and ZnCrS was measured for 1.5 < T < 10 K and B < 3 T. The data were interpreted using "crystal field model" taking into account tetrahedral crystal field, tetragonal Jahn-Teller distortion and spin-orbit interaction.
Źródło:
Acta Physica Polonica A; 1993, 84, 3; 563-565
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Magnetodielectric Properties of Transformer Oil Based Magnetic Fluids
Autorzy:
Timko, M.
Kopcansky, P.
Molcan, M.
Tomco, L.
Marton, K.
Molokac, S.
Rybar, P.
Stoian, F.
Holotescu, S.
Taculescu, A.
Powiązania:
https://bibliotekanauki.pl/articles/1428655.pdf
Data publikacji:
2012-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
47.65.Cb
77.22.Gm
77.22.Ch
Opis:
This contribution is devoted to study of dielectric and magnetodielectric properties in transformer oil based magnetic fluid. The dielectric permittivity and their anisotropy at various mutual orientation electric (50 Hz) and magnetic field were shown at the different volume concentrations of nanoparticles at room temperature. The linear increase of dielectric constant with volume concentration was confirmed which is in good agreement with the theoretical Maxwell prediction. The dielectric anisotropy factor g(B, ω) is very close to g=1. The values of permittivity increased with the increase of volume fraction of magnetite nanoparticles. The highest value of anisotropy characterized by deviation of permittivity $Δε=ε_{∥} - ε_{⊥}$ was found for the highest volume concentration which could mean that no aggregation of magnetite nanoparticles had appeared.
Źródło:
Acta Physica Polonica A; 2012, 121, 5-6; 1253-1256
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Theoretical Analysis of Ballistic Electron Emission Microscopy: Band Structure Effects and Attenuation Lengths
Autorzy:
de Andres, P. L.
Reuter, K.
Garcia-Vidal, F. J.
Flores, F.
Hohenester, U.
Kocevar, P.
Powiązania:
https://bibliotekanauki.pl/articles/1968707.pdf
Data publikacji:
1998-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.16.Ch
72.10.Bg
73.20.At
Opis:
Using a quantum mechanical approach, we compute the ballistic electron emission microscopy current distribution in reciprocal space to compare experimental and theoretical spectroscopic I(V) curves. In the elastic limit, this formalism is a "parameter-free" representation of the problem. At low voltages, low temperatures, and for thin metallic layers, the elastic approximation is enough to explain the experiments (ballistic conditions). At low temperatures, inelastic effects can be taken into account approximately by introducing an effective electron-electron lifetime as an imaginary part in the energy. Ensemble Monte Carlo calculations were also performed to obtain ballistic electron emission microscopy currents in good agreement with the previous approach.
Źródło:
Acta Physica Polonica A; 1998, 93, 2; 281-287
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Near Field Optical Microscopy and Spectroscopy with STM and AFM Probes
Autorzy:
Bergossi, O.
Bachelot, R.
Wioland, H.
Wurtz, G.
Laddada, R.
Adam, P. M.
Bijeon, J. L.
Royer, P.
Powiązania:
https://bibliotekanauki.pl/articles/1968764.pdf
Data publikacji:
1998-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
07.60.Pb
42.62.Fi
61.16.Ch
68.35.Bs
Opis:
This article deals with a new generation of scanning near field optical microscopes (SNOM), called apertureless SNOM, based on metallic, semi-conductive or dielectric probes. The classification of the apertureless probe among the usual SNOM probes is discussed in the first part. Then, we present the different apertureless SNOM configurations that we develop, with various commercial AFM and home-made tungsten tips, and several illumination and collection modes. Finally, after a preliminary result in near field imaging, we propose a promising application of such microscopes dedicated to the near field fluorescence spectroscopy.
Źródło:
Acta Physica Polonica A; 1998, 93, 2; 393-398
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Origin of serpentinite-related nephrites from Gogołów-Jordanów Massif, Poland
Autorzy:
Gil, G.
Barnes, J. D.
Boschi, Ch.
Gunia, P.
Szakmány, G.
Bendő, Z.
Raczyński, P.
Péterdi, B.
Powiązania:
https://bibliotekanauki.pl/articles/2059648.pdf
Data publikacji:
2015
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
nephrite
serpentinite-related nephrite
ortho-nephrite
stable isotopes
Gogołów-Jordanów Massif
Jordanów
Jordansmühl
Nasławice
Opis:
The Gogołów-Jordanów Massif (GJM) in the Fore-Sudetic Block, SW Poland, hosts nephrites traditionally interpreted as serpentinite-related (ortho-nephrite). This contribution confirms the serpentinite-related origin of the nephrites on the basis of mineralogy, bulk-rock chemistry, and O and H isotopes. Rock-forming amphiboles from nephrites of the GJM have 7.73–7.99 Si apfu, comparable to 7.76–8.03 Si apfu of serpentinite-related Crooks Mountain nephrite amphibole (Granite Mountains, Wyoming, USA). The GJM amphiboles also have Mg/(Mg + Fe2+) values ranging from 0.82 to 0.94, similar to serpentinite-related Crooks Mountain and New Zealand nephrites amphiboles with Mg/(Mg + Fe2+) values of 0.86–0.90 and 0.91 to 0.92, respectively. The GJM nephrite amphiboles differ from the Val Malenco dolomite-related nephrite (Italy) amphibole, e.g., Val Malenco has a higher Si content (~8.0 Si apfu), although it overlaps with some of the GJM nephrite samples, and ~1.0 Mg/(Mg + Fe2+), also higher than the GJM samples. Also, apatite in the nephrite studied from the GJM has a slightly higher Ca content than apatite from dolomite-related nephrite. Chlorites found in the Jordanów nephrite have similar compositions to that of chlorites in the serpentinite-related nephrites and also to chlorites associated with serpentinisation/rodingitisation. The bulk-rock FeO vs. Fe/(Fe + Mg), Cr, Ni, and Co are also typical of the serpentinite-related nephrites. The d18O values range from +6.1 to +6.7‰ (±0.1‰), and the average dD values = –61‰, corresponding with the serpentinite-related nephrites range. Based on petrographic observations, we suggest four crystallisation stages (including rodingitisation prior to nephrite formation): 1 – leucogranite rodingitisation and black-wall formation; 2 – tremolite formation at the expense of rodingite diopside and black-wall chlorite (nephritisation) and garnet break-down, with spinel and chlorite formation (chlorite can be a product of garnet break-down or spinel with serpentine reaction); 3 – prehnite vein formation; 4 – tremolite formation at the expense of prehnite veins and actinolite veins formation. Spinels composed of 0.29–1.96 wt.% MgO, 24.87–29.67 wt.% FeO, 8.72–22.82 wt.% Fe2O3, 3.11–4.36 wt.% Al2O3, and 39.07–54.46 wt.% Cr2O3 suggest nephritisation in the greenschist to lower-amphibolite-facies conditions.
Źródło:
Geological Quarterly; 2015, 59, 3; 457--472
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
"Leksykon rzymskiego prawa karnego. Podstawowe pojęcia", red. Maciej Jońca, C.H. Beck, Warszawa 2022, ss. 327
Lexicon of Roman criminal law: basic concepts, ed. Maciej Jońca, C.H. Beck, Warsaw 2022, p. 327
Энциклопедический словарь римского уголовного права. Основные понятия, ред. Мацей Йоньца, C.H. Beck, Варшава 2022, 327 с.
Лексикон римського кримінального права. Основні поняття, під редакцією Мацєя Йонци, C.H. Beck, Варшава 2022, ст. 327
Autorzy:
Zalewski, Bartosz
Powiązania:
https://bibliotekanauki.pl/articles/33354044.pdf
Data publikacji:
2023
Wydawca:
Katolicki Uniwersytet Lubelski Jana Pawła II
Źródło:
Studia Prawnicze KUL; 2023, 1; 247-249
1897-7146
2719-4264
Pojawia się w:
Studia Prawnicze KUL
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Complex Permeability After-Effect and Analysis of Power Losses in Ferromagnetic Co-Based Amorphous Alloy
Autorzy:
Kravčák, J.
Varga, R.
Vojtaník, P.
Powiązania:
https://bibliotekanauki.pl/articles/1813518.pdf
Data publikacji:
2008-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.40.Gb
75.60.Ch
75.60.Lr
Opis:
Complex permeability $(μ=μ_1-iμ_2)$ after-effect of near-zero magnetostrictive CoFeCrSiB amorphous alloy was investigated in magnetic field H (t)= $H_0$ exp ( i 2π f t) after demagnetization. For frequencies f from 200 Hz to 2000 Hz and for the small amplitude H_0 < $H_{cr}$ we observed practically constant both real $μ_1$ and imaginary part $μ_2$ of permeability. A measured small decrease in the real part $μ_1$ and increase in the imaginary part $μ_2$ with frequency f were theoretically calculated for a quadratic form of a domain wall potential $E_S$ (x)=1/2α $x^2$. The calculated loss factortan δ = $μ_2 μ_1$, which is small at amplitude $H_0$ < $H_{cr}$, corresponds to power losses due to eddy currents induced around reversibly moving domain walls.
Źródło:
Acta Physica Polonica A; 2008, 113, 1; 43-46
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Luminescence from β-Irradiated Graphene Layers
Autorzy:
Chruścińska, A.
Przegiętka, K. R.
Szroeder, P.
Oczkowski, H. L.
Rozpłoch, F.
Powiązania:
https://bibliotekanauki.pl/articles/2046889.pdf
Data publikacji:
2006-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
77.60.Kn
78.60.-b
78.67.Ch
81.05.Uw
Opis:
We found that β-irradiated samples of crystallite graphite and multi-walled carbon nanotubes emit light during heating above room temperature. This behaviour is rather surprising for semimetals. Due to the lack of deep enough energy gap, this optical emission cannot be associated with interband transitions, as it is usually assumed in a thermally stimulated luminescence model. We suppose that the reported accumulated luminescence is the result of thermally stimulated relaxation of some kind of defects created in graphene structures by ionising radiation and therefore we offer to name it the relaxoluminescence. We anticipate the relaxoluminescence to be a starting point for developing a new spectroscopic method for nanotechnology. It can also throw a new light on the nature of defects, which are suspected of being responsible for strange magnetic effects in carbon.
Źródło:
Acta Physica Polonica A; 2006, 110, 1; 71-80
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Course of occupational asthma depending on the duration of workplace exposure to allergens - a retrospective cohort study in bakers and farmers
Autorzy:
Broding, H.Ch.
Frank, P.
Hoffmeyer, F.
Bunger, J.
Powiązania:
https://bibliotekanauki.pl/articles/51603.pdf
Data publikacji:
2011
Wydawca:
Instytut Medycyny Wsi
Źródło:
Annals of Agricultural and Environmental Medicine; 2011, 18, 1
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of Axial Dimension of Static Head-to-Head Domain Boundary in Amorphous Glass-Coated Microwire
Autorzy:
Kladivová, M.
Ziman, J.
Kecer, J.
Duranka, P.
Powiązania:
https://bibliotekanauki.pl/articles/1030252.pdf
Data publikacji:
2017-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.Kj
75.60.Ch
Opis:
A new experiment allowing the study of static domain boundary dimensions in bistable microwire is proposed. In this experiment a static domain boundary is created by an inhomogeneous axial magnetic field. The changes in axial magnetic flux due to the presence of this boundary were measured along the microwire using two pick-up coils. Experimental results were compared with a simple theoretical model. For Fe_{77.5}Si_{7.5}B_{15} microwire with total diameter of 30 μm and metal nucleus diameter of 15 μm, good agreement between theoretical and experimental data was obtained for an axial dimension of the static domain boundary about 200 times larger than the diameter of the wire metallic core.
Źródło:
Acta Physica Polonica A; 2017, 131, 4; 639-641
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of the hydrogen adsorption to the optical properties of boron nitride nanotubes
Autorzy:
Bayani, A.
Powiązania:
https://bibliotekanauki.pl/articles/1070608.pdf
Data publikacji:
2016-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.67.Ch
85.35.-p
68.43.-h
67.63.Cd
67.80.ff
Opis:
In this research we have studied physisorption of hydrogen molecules on armchair (3,3) boron-nitride nanotube using density functional methods. Optical properties of the boron-nitride nanotube, with and without adsorbed H₂ molecules, were investigated under parallel and perpendicular polarized electric fields. The results indicate that the nanotube optical gap slightly changes due to H₂ physisorption and increasing H₂ physisorption suppresses the boron-nitride nanotube optical spectrum. Also, the nanotube gets more transparent as the H₂ concentration increases, in other words boron-nitride nanotube dielectric function decreases. Anisotropic dielectric function is another result which is determined by random phase approximation method.
Źródło:
Acta Physica Polonica A; 2016, 129, 3; 348-351
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Surfaces of FeNbCuBSiP Ribbons
Autorzy:
Butvin, P.
Butvinová, B.
Kuzminski, M.
Ślawska-Waniewska, A.
Sitek, J.
Maťko, I.
Kadlečíková, M.
Powiązania:
https://bibliotekanauki.pl/articles/1201084.pdf
Data publikacji:
2014-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.30.Gw
75.50.Tt
75.60.Ch
Opis:
Boron was partially substituted by phosphorus (3 at.%) in two Si-poor Fe-Nb-Cu-B-Si Finemets. Mostly non-significant changes were observed after vacuum annealing at 500°C, whereas equivalent Ar annealing resulted in significantly better soft-magnetic properties, which suffer from compressive surfaces stress. Possibly by hampering surface crystallization, the substitution eased the surfaces stress and reduced undesired off-axis anisotrophy at the cost of limiting the useful annealing temperature.
Źródło:
Acta Physica Polonica A; 2014, 126, 1; 152-153
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An assessment of cleaning mechanisms driven by power ultrasound using electrochemistry and highspeed imaging techniques
Autorzy:
Offin, D.
Vian, Ch.
Birkin, P.
Leighton, T.
Powiązania:
https://bibliotekanauki.pl/articles/331598.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Akustyczne
Tematy:
electrochemistry
cleaning mechanisms
high-speed imaging techniques
Opis:
The cleaning of a surface is monitored in real time using a number of physical measurements. In particular an electrochemically inactive material is removed from an electrode while the electrode is able to detect a redox system in the bulk liquid. The removal of the material from the surface is monitored as an increased Faradaic current at the electrode surface. This signal is used to assess the ability of the cleaning method employed, in this case the application of power ultrasound to the system, as a function of the position of the electrode with respect to the sound source. It is shown that, depending on the conditions employed, surface cleaning is driven by different mechanisms. In order to validate these findings highspeed imaging of the system was undertaken and the results correlated with the electrochemical data. In addition a number of novel electrodes were also employed to assess the cleaning efficiency as a function of the electrode geometry employed. Implications for surface cleaning in the presence of power ultrasound are suggested.
Źródło:
Hydroacoustics; 2008, 11; 299-312
1642-1817
Pojawia się w:
Hydroacoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New microwave assisted radiolabelling method and rat brain biodistribution study of two new 99mTc-tricarbonyl complexes as potential brain imaging agents
Autorzy:
Trabelsi, M.
Mekni, A.
Solanki, Ch.
Maltby, P.
Saidi, M.
Powiązania:
https://bibliotekanauki.pl/articles/147766.pdf
Data publikacji:
2008
Wydawca:
Instytut Chemii i Techniki Jądrowej
Opis:
Two new cyclopentadienyl piperidine derivatives, namely ferrocene carboxylic acid 1-ethyl-3-hydroxypiperidinyl ester and ferrocene carboxylic acid 4-hydroxypiperidinyl ester, were synthesized. The ligands were then radiolabelled with 99mTc using two different approaches. The first method consisted of reacting the ligand precursor with Mn(CO)5Br in pertechnetate 99mTcO4 - in normal saline and dimethyl formamide (DMF) at 150°C for 1 h. The yields were 70% and 90%, respectively. For the second method, the reactions mixtures were placed in a microwave oven for 2 min at 650 watt. The yields were higher than 90% for both 99mTc complexes. Biodistribution studies showed that tricarbonyl{eta5- [carboxy-3-hydroxy(N-ethyl)piperidine]cyclopentadienyl}technetium(I) had the highest brain uptake. The regional distribution in the brain also demonstrated relatively higher uptake of tricarbonyl{eta5-[carboxy-3-hydroxy(N-ethyl) piperidine]cyclopentadienyl}technetium(I) in the colliculus (1.97% ID/g tissue,) with the colliculus to cerebellum ratio of 1.99. We conclude that the radiolabelling can be achieved by microwave activation, and tricarbonyl{eta5-[carboxy-3- hydroxy(N-ethyl)piperidine]cyclopentadienyl}technetium(I) has the potential for use as central nervous system (CNS) imaging agent.
Źródło:
Nukleonika; 2008, 53, 3; 97-101
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of Anisotropic Vector Preisach Model for Bulk Materials
Autorzy:
Frydrych, P.
Szewczyk, R.
Nowicki, M.
Charubin, T.
Powiązania:
https://bibliotekanauki.pl/articles/1032677.pdf
Data publikacji:
2017-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.60.-d
75.60.Ch
75.60.Nt
75.30.Gw
85.70.-w
Opis:
In this paper possibility of application two-dimensional vector Preisach model for bulk materials was investigated. Physical magnetization mechanisms in bulk cores and thin ribbons were analyzed. Model is based on collection of the Preisach planes which describe material state in different angles on rotation plane. Presented model exhibits good conformity with experimental data for bulk as well for ribbon shaped cores. Model includes anisotropy and describes not only mean magnetization vector, but also distribution of magnetic moments for different angles.
Źródło:
Acta Physica Polonica A; 2017, 131, 4; 618-620
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Violation of Bell-CHSH & CH Inequalities by Superposition of Two Coherent States (π/2 Out of Phase)
Autorzy:
Kumar Mishra, D.
Powiązania:
https://bibliotekanauki.pl/articles/1400190.pdf
Data publikacji:
2013-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
03.65.Ud
03.67.Mn
42.50.Dv
42.50.-p
Opis:
We study the tests of the Bell-CHSH & CH inequalities by superposition of two coherent states (ı/2 out of phase), a class of non-Gaussian state, using photon parity and on/off measurements. Large violations of the Bell-type inequalities have been observed theoretically confirming the interpretation and validity of quantum mechanics against the local-realistic theories.
Źródło:
Acta Physica Polonica A; 2013, 123, 1; 21-24
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of silver nanoparticles on chicken health after infection with Campylobacter jejuni
Autorzy:
Chwalibog, A.
Vadalasetty, K. P.
Lauridsen, Ch.
Engberg, R. G.
Vadalasetty, R.
Kutwin, M.
Sawosz, E.
Powiązania:
https://bibliotekanauki.pl/articles/285844.pdf
Data publikacji:
2017
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
silver nanoparticles
birds
broilers
Źródło:
Engineering of Biomaterials; 2017, 20, no. 143 spec. iss.; 52
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Recent developments for high intensity beams at GANIL
Autorzy:
Moscatello, M.
Anger, P.
Berthe, C.
Bertrand, P.
Bru, B.
David, L.
Di Giacomo, M.
Jamet, Ch.
Ozille, M.
Pellemoine, F.
Petit, E.
Savalle, A.
Vignet, J.-L.
Powiązania:
https://bibliotekanauki.pl/articles/146199.pdf
Data publikacji:
2003
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
cyclotron
diagnostics
electrostatic deflectors
RF system
high intensity beam
Opis:
In December 2001, a 5 kW beam was accelerated for the first time at GANIL. This performance was achieved after the increase of SSC2 dee voltage from 170 kV to 200 kV. Moreover, several technical developments have been done, to improve the operation with high intensity beams, and a new electrostatic deflector is under construction in order to reduce losses and activation at the exit of SSC2. This paper presents an overview of these works and the main results on the last accelerated beams.
Źródło:
Nukleonika; 2003, 48,suppl.2; 155-158
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
IR Dispersion of Liquid CH$\text{}_{3}$I. I. Optical Constants and Integrated Intensities
Autorzy:
Czarnecki, M. A.
Hawranek, J. P.
Powiązania:
https://bibliotekanauki.pl/articles/1887263.pdf
Data publikacji:
1991-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
33.20.Ea
33.70.Fd
78.20.Dj
78.30.Cp
Opis:
The spectra of both components of the complex refractive index of liquid CH$\text{}_{3}$I were obtained in the infrared region using the thin film transmission method. Dispersion data and integrated intensities for principal bands were determined and discussed.
Źródło:
Acta Physica Polonica A; 1991, 79, 4; 437-450
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Influence of Jahn-Teller Effect on Magnetic Properties of Fe-Based Semimagnetic Semiconductors
Autorzy:
Lebeckl, K.
Twardowski, A.
Liro, Z.
Powiązania:
https://bibliotekanauki.pl/articles/1887005.pdf
Data publikacji:
1991-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.90.+w
71.70.Ej
71.70.Ch
75.50.Pρ
Opis:
We report results of calculations of magnetic properties (specific heat, magnetization) of Fe-based Semimagnetic Semiconductors including Jahn-Teller coupling between Fe electronic states and phonons.
Źródło:
Acta Physica Polonica A; 1991, 79, 2-3; 373-375
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ecological significance of the arthropod fauna from the Jurassic (Callovian) La Voulte Lagerstatte
Autorzy:
Charbonnier, S.
Vannier, J.
Hantzpergue, P.
Gaillard, Ch.
Powiązania:
https://bibliotekanauki.pl/articles/22428.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
ecological significance
arthropod
fauna
Jurassic
Callovian
Lagerstatte
Arthropoda
Crustacea
Thylacocephala
France
paleontology
Opis:
The La Voulte Lagerstätte is remarkable for its unique soft−bodied fauna (e.g., worms, coleoid squids) and its exceptionally preserved arthropods mainly found in small sideritic concretions. This arthropod fauna includes 30 different species assigned to the crustaceans, the thylacocephalans and the pycnogonids. Crustaceans are the most diversified group with 23 species distributed in a dozen families. Quantitative analyses based on 388 nodules reveals four dominant groups: (i) the enigmatic thylacocephalan arthropods (33%), (ii) the Solenoceridae shrimps (22%), (iii) the Coleiidae crustaceans (15%), and (iv) the Penaeidae shrimps (10%). Converging lines of evidence from depositional environment and modern analogues, indicate that this arthropod fauna probably inhabited a deep water setting most probably exceeding 200 m (= bathyal zone) under dysphotic or aphotic conditions. This new set of data sheds new light on the deep−sea colonisation by animal communities in the Mesozoic.
Źródło:
Acta Palaeontologica Polonica; 2010, 55, 1
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Identyfikacja przeciwutleniaczy stosowanych do polietylenu. Część I. Metodyka
Identifikacija antiokislitelejj primenjaemykh k poliehtilenu i poliehtilenovym izdelijam. Ch.I. Metodika
Identification of antioxidants used for polyethylene and polyethylene products. P.I. Method
Autorzy:
Sokolowska, R.
Powiązania:
https://bibliotekanauki.pl/articles/875144.pdf
Data publikacji:
1966
Wydawca:
Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
Źródło:
Roczniki Państwowego Zakładu Higieny; 1966, 17, 5
0035-7715
Pojawia się w:
Roczniki Państwowego Zakładu Higieny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Almost disjoint families and property (a)
Autorzy:
Szeptycki, Paul
Vaughan, Jerry
Powiązania:
https://bibliotekanauki.pl/articles/1205285.pdf
Data publikacji:
1998
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
property (a), density
extent
almost disjoint families
Ψ-space
CH
GCH
Martin's Axiom
$\got p = \got c$
Cohen forcing
Q-set
weakly inaccessible cardinal.
Opis:
We consider the question: when does a Ψ-space satisfy property (a)? We show that if $|A| < \got p$ then the Ψ-space Ψ(A) satisfies property (a), but in some Cohen models the negation of CH holds and every uncountable Ψ-space fails to satisfy property (a). We also show that in a model of Fleissner and Miller there exists a Ψ-space of cardinality $\got p$ which has property (a). We extend a theorem of Matveev relating the existence of certain closed discrete subsets with the failure of property (a).
Źródło:
Fundamenta Mathematicae; 1998, 158, 3; 229-240
0016-2736
Pojawia się w:
Fundamenta Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Piezomagnetic Dependences on Magnetic Bias Field of Annealed at 450°C Fe-Cu-Nb-Si-B Alloy
Autorzy:
Kaczkowski, Z.
Milewska, E.
Duhaj, P.
Vlasák, G.
Powiązania:
https://bibliotekanauki.pl/articles/1956531.pdf
Data publikacji:
1997-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.60.Nt
75.80.+q
75.60.Ch
Opis:
Magnetic field dependences of the piezomagnetic dynamics, magnetomechanical coupling and elasticity moduli in the Fe$\text{}_{73.5}$Cu$\text{}_{1}$Nb$\text{}_{3}$ Si$\text{}_{13.5}$B$\text{}_{9}$ alloy in an as-quenched state and annealed in vacuum for 1 h at 450°C were investigated. The maximum value of the magnetomechanical coupling coefficient was equal to 0.15 for the as-quenched state and 0.7 after annealing at 450°C. The changes of the elasticity moduli (ΔE effect) from about 60 to 180 GPa were observed after annealing at this temperature. These changes are connected with magnetostriction (equal to 25.8×10$\text{}^{-6}$ at saturation), internal stresses, defects, mechanical, magnetic and heat treatment history.
Źródło:
Acta Physica Polonica A; 1997, 91, 2; 487-490
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sexual initiation of youths in selected European countries compared with their sexual and contraceptive knowledge
Autorzy:
Krauss, H.
Bogdanski, P.
Szulinska, M.
Malewski, M.
Buraczynska-Andrzejewska, B.
Sosnowski, P.
Piatek, J.
Demont, C.
Kaczmarek, Ch.
Kaczmarek, E.
Szpakow, A.
Kleszczewska, E.
Maciorkowska, E.
Klimberg, A.J.
Mikrut, K.
Powiązania:
https://bibliotekanauki.pl/articles/49429.pdf
Data publikacji:
2012
Wydawca:
Instytut Medycyny Wsi
Źródło:
Annals of Agricultural and Environmental Medicine; 2012, 19, 3
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of climate change on CO2 and CH4 concentration near closed shaft – numerical simulations
Wpływ zmiany klimatu na rozkład stężeń CO2 i CH4 wokół nieczynnego szybu – symulacje numeryczne
Autorzy:
Wrona, P.
Powiązania:
https://bibliotekanauki.pl/articles/219322.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
emisja gazów cieplarnianych
zmiana klimatu
likwidacja kopalń
nieczynny szyb
lokowanie podziemne gazów
bezpieczeństwo
CFD
greenhouse gas emissions
climate change
mine closure
abandoned shafts
underground gas storage
public safety
Opis:
Given the scientific consensus pointing to climate change, the more extreme weather events associated with this will lead to deeper pressure drops. As has already been stated, pressure drops are the main cause of gas flow from underground sites to the surface. This article presents the results of numerical simulations of the change in distribution of CO2 and CH4 near a closed mining shaft under the predicted baric tendency. Simulations have been undertaken by means of the FDS software package with the Pyrosim graphical interface – a CFD tool for fire and ventilation analysis. Assumptions have been based on previous results of in-situ measurements. The results (determined for a height of 1m above the ground) were compared to the following levels (later in the text comparison levels): for CO2 0.1%vol. according to Pettenkoffer’s scale and 2.5%vol. for CH4 as the half of Lower Explosive Limit (LEL). The results show that the deeper baric drops anticipated could lead to a wider spread of both greenhouse gases in the vicinity of the shaft, especially along the prevailing wind direction. According to the results obtained, CO2 and CH4 with concentrations above their comparison levels are expected at a distance greater than 50m from the shaft when wind is present for CO2 and at a distance of 4.5m for CH4. Subsequent analysis of the results enabled the determination of functions for describing the concentration of gases along the wind direction line under the projected pressure drop. The results relate to a particular case, although the model could easily be modified to any other example of gas emissions from underground sites.
Wraz ze zmianami klimatu należy spodziewać się większej niż obecnie liczby dni w roku, w których będą występować ekstremalne zjawiska pogodowe, związane z przechodzeniem coraz głębszych frontów atmosferycznych (np. Falarz, 1997; Koźmiński i Michalska, 2010). Przyczyni się to do wzrostu tendencji barycznej zniżek ciśnienia. Zniżki baryczne są główną przyczyną emisji gazów kopalnianych na powierzchnię (Wrona et al., 2016b). Gazy te zawierają głównie CO2 i CH4, które są uznawane za gazy cieplarniane oraz mogą stworzyć lokalne zagrożenie dla bezpieczeństwa powszechnego (np. Czaja, 2012). W artykule przedstawiono wyniki symulacji numerycznych dotyczących zmiany stężenia obu gazów emitowanych z nieczynnego szybu górniczego na skutek zwiększającej się zniżkowej tendencji barycznej. Na podstawie analizy literaturowej zagadnienia (np. Falarz, 1997), stwierdzono, że w przyszłości możliwe są ekstremalne zniżki baryczne sięgające lub nawet przekraczające 5 hPa/1h. Na obszarze południowej Polski można spodziewać się raz na dwa lata zniżki sięgającej 4 hPa/1h oraz raz na 10 lat przekraczającej 5 hPa/1h. Takie zdarzenie, spowodowane przez zmiany klimatu, może doprowadzić do intensywniejszego wypływu gazów z obszarów podziemnych, a przez to zasięg ich oddziaływania może być zaskakujący i przede wszystkim niebezpieczny dla okolicznej ludności. Równocześnie do atmosfery zostanie wyemitowana większa ilość gazów cieplarnianych. Natężenie emisji gazów przyjęte podczas symulacji oparto o wyniki pomiarów in-situ nad jednym z nieczynnych szybów na Górnym Śląsku (Wrona et al., 2016b), kiedy to wyznaczono empiryczną zależność (1) pomiędzy wartością tendencji zniżki barycznej, a natężeniem wypływu gazów przez szyb. Założono także stężenia obu gazów jako 5%obj. Wartości te określono jako prawdopodobne na podstawie przeprowadzonych wcześniej pomiarów (Wrona et al., 2016b), oraz na podstawie analizy literaturowej (np. Nawrat, 2002; Szlązak et al., 2002; Krause, 2003). Założono kilka wariantów (zestawów danych wejściowych) symulacji. Dotyczyły one zmiennej wartości tendencji barycznej (TB) oraz wpływu wiatru z jednego kierunku geograficznego (zachodu).Wyznaczone wartości zostały określone na wysokości 1m nad gruntem. Wykazano, że przy bezwietrznej pogodzie, wraz ze wzrostem tendencji barycznej do wartości 5 hPa/1h zasięg obecności CO2 w stężeniu przekraczającym 0.1%obj. (wartość po przekroczeniu której można odnotować efekt duszący, wg skali Pettenkoffera), sięga 45 m. Dla metanu przyjęto poziom porównawczy jako 2.5%obj. stanowiący połowę dolnej granicy wybuchowości tego gazu i stwierdzono, że stężenie wyższe od tej wartości występuje do 4 m od szybu. Przy wietrze 5m/s z zachodu i TB = 1 hPa/1h wartości NDS w linii wiatru (E) są przekroczone do 50 m dla CO2 i 4.2 m dla CH4 (Rys. 6,7). Natomiast przy prognozowanej zniżce 5 hPa/1h wartość NDS dla CO2 w linii jest przekroczona na ponad 50 m od szybu, a dla CH4 na 4.5 m (Rys. 8,9) Prognozę dotyczącą zmiany stężenia na linii zgodnej z dominującym kierunkiem wiatru przedstawiono na rysunkach 10 i 11, podano funkcje aproksymujące i współczynnik determinacji wykonanej prognozy (2) i (3). Wykazano, że przy spodziewanej na skutek zmian klimatu zniżce barycznej sięgającej 5 hPa/1h oba gazy mogą być obecne w odległości ponad 100 m od szybu na wysokości 1m nad gruntem. Uzyskane wyniki wskazują na możliwość występowania w przyszłości poważniejszego niż obecnie zagrożenia gazowego wokół nieczynnych szybów, a także zwiększonej emisji gazów cieplarnianych do atmosfery. Zbudowany model może być łatwo modyfikowany do innych przypadków emisji gazów z górotworu, np. przy rozszczelnieniu instalacji CCS lub UCG, a także przy wszelkich stanach awaryjnych systemów odmetanowania.
Źródło:
Archives of Mining Sciences; 2017, 62, 3; 639-652
0860-7001
Pojawia się w:
Archives of Mining Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Interference Effects in T-MOKE Spectra of Fe Thin Films at the 3p Edges - Theory and Experiment
Autorzy:
Legut, D.
Tesch, M.
Oppeneer, P.
Mertins, H.
Jansing, Ch.
Gilbert, M.
Gaupp, A.
Bürgler, D.
Schneider, C.
Powiązania:
https://bibliotekanauki.pl/articles/1386641.pdf
Data publikacji:
2015-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.30.Gw
78.20.Ls
78.70.Ck
74.20.Pq
Opis:
We present combined first-principle calculations and experimental results of the transversal magneto-optical Kerr effect (T-MOKE) of thin Fe films across the 3p edges using linearly polarized synchrotron radiation. We show that the experimental T-MOKE spectra at the 3p edges of Fe exhibit clear signals that are strongly influenced by interference effects. Ab initio calculated T-MOKE asymmetry spectra confirm the importance of interference effects. The comparison of experimental with calculated spectra reveals some differences that we attribute to metal/metal interface roughness that is not taken into account in the calculations.
Źródło:
Acta Physica Polonica A; 2015, 127, 2; 466-468
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Anomalous Dielectric Spectra of Ferro- and Ferrielectric Liquid Crystalline Phase in MHPNBC
Autorzy:
Dubois, F.
Douali, R.
Wawrzyniak, A.
Legrand, Ch.
Ropa, P.
Wróbel, S.
Dąbrowski, R.
Powiązania:
https://bibliotekanauki.pl/articles/1399013.pdf
Data publikacji:
2013-12
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
77.22.Gm
77.84.Nh
64.70.M
Opis:
MHPOBC analogue with long achiral alkyl chain has been investigated by dielectric spectroscopy studies in the wide temperature range. Low frequency dielectric spectroscopy revealed the existence of normal ferroelectric phase (in a narrow gap), two ferri- and three antiferroelectric phases in addition to paraelectric phase and alpha sub-phase. The compound studied shows exceptionally strong dependence of the dielectric permittivities on measuring electric field in the temperature range of ferro- and ferrielectric phases.
Źródło:
Acta Physica Polonica A; 2013, 124, 6; 937-939
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Temperature Dependence of a Dielectric Relaxation in Weakly Polar Ferrofluids
Autorzy:
Rajňák, M.
Kurimský, J.
Dolník, B.
Cimbala, R.
Paulovičová, K.
Kopčanský, P.
Timko, M.
Powiązania:
https://bibliotekanauki.pl/articles/1032784.pdf
Data publikacji:
2017-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
47.65.Cb
77.22.Ch
77.22.Gm
82.70.Dd
Opis:
In this paper, we report on the temperature dependent broadband dielectric response of a ferrofluid based on transformer oil and magnetite nanoparticles covered with oleic acid molecules. For that purpose the method of dielectric spectroscopy has been chosen in the frequency range from 20 Hz up to 100 kHz. The experiments were carried out on thin film ferrofluid samples confined in a glass plate capacitor containing indium tin oxide (ITO) plate electrodes. The obtained complex permittivity spectrum shows a pronounced dielectric dispersion in the low frequency range. Taking into account the ferrofluid composition we associate this relaxation with ion impurity polarization at the nanoparticle-oil interface. The strong temperature dependence of the relaxation process has been found when conducting the experiments in the temperature range from 298 K to 358 K. The relaxation time of the revealed process exhibits a typical Arrhenius behavior. Based on the conducted experiments and analysis, we propose some reasonable practical applications of the studied ferrofluid in the field of electrical engineering.
Źródło:
Acta Physica Polonica A; 2017, 131, 4; 943-945
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Localization of Copy-Move Forgery in Speech Signals Through Watermarking Using DCT-QIM
Autorzy:
Lalitha, N.V.
Rao, Ch. Srinivasa
Jaya-Sree, P.V.Y.
Powiązania:
https://bibliotekanauki.pl/articles/227242.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
watermarking
copy-move forgery
discrete Cosine
transform
quantization index modulation
hash bits
Opis:
Digital speech copyright protection and forgery identification are the prevalent issues in our advancing digital world. In speech forgery, voiced part of the speech signal is copied and pasted to a specific location which alters the meaning of the speech signal. Watermarking can be used to safe guard the copyrights of the owner. To detect copy-move forgeries a transform domain watermarking method is proposed. In the proposed method, watermarking is achieved through Discrete Cosine Transform (DCT) and Quantization Index Modulation (QIM) rule. Hash bits are also inserted in watermarked voice segments to detect Copy-Move Forgery (CMF) in speech signals. Proposed method is evaluated on two databases and achieved good imperceptibility. It exhibits robustness in detecting the watermark and forgeries against signal processing attacks such as resample, low-pass filtering, jittering, compression and cropping. The proposed work contributes for forensics analysis in speech signals. This proposed work also compared with the some of the state-of-art methods.
Źródło:
International Journal of Electronics and Telecommunications; 2019, 65, 3; 527-532
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Electric and Magnetic Fields on Dielectric Response of Oil-Based Ferrofluid
Autorzy:
Hardoň, Š.
Kúdelčík, J.
Bury, P.
Gutten, M.
Powiązania:
https://bibliotekanauki.pl/articles/1030433.pdf
Data publikacji:
2018-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
47.65.Cb
77.22.Gm
77.22.Ch
75.50.Mm
75.75.Jn
Opis:
The changes in dielectric parameters and structural arrangement of transformer oil based ferrofluid with magnetic nanoparticles upon the effect of an external magnetic field and an electric field were studied by dielectric spectroscopy. The frequency dependence of dissipation factor was measured within the frequency range from 1 mHz to 10 kHz by a capacitance method. In the presence of the magnetic field the interaction between the magnetic field and magnetic moments of nanoparticles led to the aggregation of nanoparticles. The electric field had also effects on the change in the electric dipole moment of particles by transfer of counterions. The observed low frequency relaxation maximum of dissipation factor was explained by Schwarz theory of electric double layer polarization. The shift of this maximum with the intensity of electric was caused by change of relaxation time of the nanoparticles-counterions systems.
Źródło:
Acta Physica Polonica A; 2018, 133, 3; 477-479
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
X-ray Study of Ferroelectric Phase Transition in (NH(CH$\text{}_{3}$)$\text{}_{3}$)$\text{}_{3}$Sb$\text{}_{2}$Cl$\text{}_{9}$
Autorzy:
Tomaszewski, P. E.
Powiązania:
https://bibliotekanauki.pl/articles/1932124.pdf
Data publikacji:
1995-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
64.70.Kb
61.50.Ks
77.80.Bh
65.70.+y
Opis:
The lattice parameters of a title crystal, TMACA, were measured from a room temperature to 405 K by the X-ray single-crystal Bond method. The high-temperature paraelectric phase should have the monoclinic symmetry (space group P2/c). Some peculiarities on dielectric behaviour of the crystal were explained. The hypotheses on incommensurability of the paraelectric phase as well as on the parent normal (trigonal) phase were presented.
Źródło:
Acta Physica Polonica A; 1995, 87, 3; 631-634
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Unique Properties of Quadratic Solitons
Autorzy:
Stegeman, G. I.
Fuerst, R.
Malendevich, R.
Schiek, R.
Baek, Y.
Baumann, I.
Sohler, W.
Leo, G.
Assanto, G.
Bosshard, Ch.
Günter, P.
Powiązania:
https://bibliotekanauki.pl/articles/2008209.pdf
Data publikacji:
1999-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.65.Tg
42.65.Yj
42.65.-k
Opis:
Quadratic spatial solitons exist in media with second order nonlinearities near the phase-matching condition for frequency mixing processes involving two or three waves of different frequency. Discussed here are a number of properties of these special solitons which are different from those of other spatial solitons which rely on optically induced index changes for guiding. First, the self-guiding properties of quadratic solitons are shown to have completely different origins than solitons which rely on index changes. Second, it is shown that there exists a large variety of quadratic solitons which contain two or three distinct spectral components with relative amplitudes depending on the phase mismatch, dimensionality of the propagation geometry, the soliton power and the launching conditions. Third, under appropriate conditions, solitons can be formed even when the group velocity directions for the spectral components lead to walk-off under normal circumstances. Fourth, for type II phase-matching in bulk crystals, seeded interactions lead to saturating amplifier characteristics.
Źródło:
Acta Physica Polonica A; 1999, 95, 5; 691-703
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Co Doping on Induced Anisotropy and Domain Structure in Magnetic Field Annealed $(Fe_{1-x}Co_x)_{79}Mo_8Cu_1B_{12}$
Autorzy:
Kunca, B.
Marcin, J.
Švec, P.
Kováč, J.
Švec Sr., P.
Škorvánek, I.
Powiązania:
https://bibliotekanauki.pl/articles/1398273.pdf
Data publikacji:
2017-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.30.Gw
75.50.Tt
75.60.Ch
75.60.Nt
Opis:
The effect of heat treatment in applied magnetic field on the induced anisotropy and domain structure of $(Fe_{1-x}Co_x)_{79} Mo_8 Cu_1 B_{12}$ (x=0, 0.2, 0.5) nanocrystalline alloy system was investigated. A heat treatment of Co-doped samples under the application of longitudinal magnetic field resulted in squared hysteresis loops characterized by very low coercive field values. Sheared loops with tunable slope and good field linearity were obtained after annealing in transverse magnetic field. Corresponding domain structure showed uniform character, oriented in the direction parallel or perpendicular to the ribbon axis after longitudinal or transverse magnetic field annealing, respectively. No effect of magnetic field annealing was found in Co-free sample. Correlations between Co-doping, the Curie temperature, and soft magnetic properties after magnetic field annealing are discussed.
Źródło:
Acta Physica Polonica A; 2017, 131, 4; 759-761
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Specific Heat of (NH$\text{}_{2}$(CH$\text{}_{3}$)$\text{}_{2}$)$\text{}_{3}$Bi$\text{}_{2}$I$\text{}_{9}$
Autorzy:
Plackowski, T.
Włosewicz, D.
Tomaszewski, P. E.
Baran, J.
Marchewka, M. K.
Powiązania:
https://bibliotekanauki.pl/articles/1932127.pdf
Data publikacji:
1995-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
64.70.Kb
65.40.-f
Opis:
The specific heat of title compound was measured by adiabatic calorimeter in the temperature range 80-315 K. The phase transitions at about 304, 285 and 235 K were confirmed. A new structural phase transition at about 125 K was observed as well as new anomaly on differential scanning calorimetry (DSC) curve at about 318 K. The peculiar multiple character of C, anomalies may be explained in terms of phase transitions or intermediate phases induced by impurities. The specific heat data are in agreement with the independent DSC measurements and with preliminary X-ray studies.
Źródło:
Acta Physica Polonica A; 1995, 87, 3; 635-641
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Association between perceived social support and occupational burnout in Greek nurses: A preliminary study
Autorzy:
Chastali-Sitara, M.
Alikari, V.
Platis, CH.
Tsironi, M.
Zyga, S.
Theofilou, P.
Powiązania:
https://bibliotekanauki.pl/articles/1918944.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Medyczny w Białymstoku
Tematy:
Perceived social support
burnout
nurses
emotional exhaustion
depersonalization
personal accomplishment
Opis:
Purpose: To examine the relationship between perceived social support and burnout among nurses. Materials and methods: The participants of this study were 42 Greek nurses of a general hospital which were randomly selected. Data was collected using the Greek version of Maslach’s Burnout Inventory for burnout assessment and the Greek version of ‘The Multidimensional Scale of Perceived Social Support’ for the assessment of participants’ levels of perceived social support. A self-administered questionnaire with questions about socio-demographic and work-related characteristics was used. Descriptive statistics and Spearman’s rho correlation coefficient analysis were conducted. Results: The results showed a negative association between emotional exhaustion, depersonalization and perceived social support, especially from friends. Social support from significant others found to have the highest impact while family support found to have the least impact in nurses’ social support. Conclusions: Findings could be applied to the assessment of burnout in Greek nurses and to future prevention of burnout through the enhancement of perceived social support.
Źródło:
Progress in Health Sciences; 2020, 10(2); 22-28
2083-1617
Pojawia się w:
Progress in Health Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dielectric and Dilatometric Properties of NH(CH$\text{}_{3}$)$\text{}_{3}$CuCl$\text{}_{3}$·2H$\text{}_{2}$O Low Dimensional Ferroics
Autorzy:
Korchak, Yu.
Kapustianik, V.
Batiuk, A.
Girnyk, I.
Czapla, Z.
Dacko, S.
Powiązania:
https://bibliotekanauki.pl/articles/1872270.pdf
Data publikacji:
2004-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
64.70.-p
Opis:
On the basis of dilatometric and dielectric investigations of NH(CH$\text{}_{3}$)$\text{}_{3}$CuCl$\text{}_{3}$·2H$\text{}_{2}$O crystals the earlier unknown phase transition with considerable temperature hysteresis was found at T$\text{}_{1}^{c}$=198 K and T$\text{}_{1}^{h}$=223 K, respectively, in cooling and heating runs. Existence of the characteristic dielectric dispersion was revealed within the high-temperature phase. It corresponds to the single dielectric relaxator below 250 K as well as to co-existence of two relaxators above this temperature. The determined values of the activation energy and relaxation time are characteristic of the co-operative reorientation of the trimethylammonium cation (high-frequency relaxator) whereas the combined reorientation motions of the CuCl$\text{}_{2}$·2H$\text{}_{2}$O chains would be responsible for the low-frequency relaxation process. It was found that the above mentioned quasi-Debye type processes are involved into the mechanisms of the protonic conductivity.
Źródło:
Acta Physica Polonica A; 2004, 106, 1; 39-49
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Scanning Tunneling Microscopy/Spectroscopy Investigations of the Interference Effects Caused by the Circular Pits on the Thermally Oxidized graphite Surface
Autorzy:
Klusek, Z.
Kalinowski, M. W.
Olejniczak, W.
Kobierski, P.
Powiązania:
https://bibliotekanauki.pl/articles/1968772.pdf
Data publikacji:
1998-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
33.60.Fy
61.16.Ch
71.20.-b
Opis:
The thermal oxidation of the graphite leads to the removal of monoatomic carbon layers from the surface and formation of circular pits on the exposed plane. Near the pit edges the scanning tunneling spectroscopy measurements show a series of very narrow flat regions on the I/V characteristics. The observed I/V flat regions appear only when the characteristic is recorded very close to the pit edges. The appearance of tunneling current steps can be explained by the oscillating character of the local density of states near the pit edges. A simple quantum mechanical model in 2D based on boundary condition for an electron wave function is proposed.
Źródło:
Acta Physica Polonica A; 1998, 93, 2; 415-420
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development and validation of spectrophotometric methods for the quantification of solifenacin succinate: application to tablet dosage forms
Autorzy:
Seshamamba, B. S. V.
Satyanarayana, P. V. V.
Sekaran, Ch. B.
Powiązania:
https://bibliotekanauki.pl/articles/412347.pdf
Data publikacji:
2013
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Solifenacin succinate
potassium permanganate
copper sulphate
ammonium molybdate
bromocresol green
Opis:
Four sensitive, precise and accurate spectrophotometric methods for the estimationof solifenacin succinate(SFS) have been developed. Method Adescribes the interaction of SFSwith potassium permanganate in alkaline mediumto give green colored manganate ionwith absorption maxima at 610nm. Methods Band Care based on the formation of ternary complexes of SFSwith, copper (II)/eosin(method B)and ammonium molybdate/ammonium thiocyanate(method C),respectivelywhich are extracted into chloroform and have absorption maxima at 545nm (method B) and 465nm (method C). Method D was based on the formation of yellowcolored ion-pair complex between bromocresol green and SFS in dichloromethane medium with absorption maxima at 415nm.Regression analysis of Beer's law plot showed good correlation in the concentration range of 5-50, 2.5-50, 10-100 and 2-20 μg/mLfor methods A, B, Cand D, respectively. Different variables affecting the reaction were studied and optimized. The proposed methods were applied successfully for the analysis of SFSin tablets dosage forms. No interference was observed from common pharmaceutical excipients.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2013, 10, 2; 167-182
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spin Glass State in S=3/2 Kagomé Antiferromagnet $Co(N_{3})_{2}(bpg)[(CH_{3})_{2}(NCOH)]_{4/3}$
Autorzy:
Vrábel, P.
Čižmár, E.
Orendáčová, A.
Gao, S.
Orendáč, M.
Powiązania:
https://bibliotekanauki.pl/articles/1368680.pdf
Data publikacji:
2014-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.Ee
75.30.Et
75.10.Nr
Opis:
Specific heat, magnetic susceptibility and magnetization of $Co(N_{3})_{2}(bpg)[(CH_{3})_{2}(NCOH)]_{4/3}$, representing S=3/2 kagomé system are reported. Long-range ordering at 16 K was revealed, however, at lower temperatures slow spin dynamics is still found. The analysis of alternating susceptibility suggests the onset of glassy state. The study of the time dependence of magnetization revealed the existence of more relaxation channels with pronounced different relaxation times. The observed behaviour is consistent with the formation of topological spin glass in which relaxation is governed by both spin and chiral degrees of freedom.
Źródło:
Acta Physica Polonica A; 2014, 126, 1; 266-267
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Current Annealing on Domain Structure in Amorphous and Nanocrystalline FeCoMoB Microwires
Autorzy:
Klein, P.
Varga, R.
Onufer, J.
Ziman, J.
Badini-Confalonieri, G.
Vazquez, M.
Powiązania:
https://bibliotekanauki.pl/articles/1032776.pdf
Data publikacji:
2017-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.Kj
75.60.Ej
75.60.Jk
75.70.Kw
75.60.Ch
Opis:
The influence of current annealing on the complex domain structure in amorphous and nanocrystalline FeCoMoB microwire has been studied. The thickness of radial domain structure together with the switching field of single domain wall change as a consequence of variation of complex internal stress distribution inside metallic core. Firstly, radial domain structure thickness monotonously increases with increasing annealing DC current density for amorphous state. Switching field exhibits local minimum in nanocrystalline sample annealed at 500 MA/m^2 for 10 min when the lowest thickness of outer shell (182 nm) was observed. Such annealed sample (which magnetic properties exhibit excellent temperature stability) is suitable candidate for miniaturized sensor construction for sensing the magnetic field or mechanical stress.
Źródło:
Acta Physica Polonica A; 2017, 131, 4; 681-683
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sinemurian to lowermost Toarcian ammonites of the Brescian Prealps (Southern Alps, Italy): preliminary biostratigraphical framework and correlations
Autorzy:
Meister, Ch.
Schirolli, P.
Dommergues, J-L.
Powiązania:
https://bibliotekanauki.pl/articles/2061352.pdf
Data publikacji:
2009
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Early Jurassic
ammonites
lithostratigraphy
biostratigraphy
rifting
Val Trompia-Sebino Basin
Botticino High
Southern Alps
Brescian Prealps
Italy
Opis:
A set of 28 ammonite biohorizons or faunal assemblages is proposed for the Sinemurian, the Pliensbachian and the lowermost Toarcian of the Brescian Prealps, in part based on the published data of the authors of this contribution and partly on new results, derived both from recent field investigations and from the study of the historical collection of Lower Jurassic ammonites preserved in the Museum of Natural Sciences of Brescia (Northern Italy). The biohorizons are present in the Liassic carbonate succession of the Brescian Prealps, cropping out between the eastern surroundings of Brescia (Botticino), to the east, and Lake Iseo, to the west. Since the Hettangian this region was subjected to Jurassic rifting. The area of study was located on the eastern border of the wide Lombardian Basin, a part of the southern continental passive margin of Tethys. An articulated fault-system, trending from Brescia to the North, separated the western subsiding area of the Val Trompia-Sebino Basin from the eastern Botticino structural high. After the drowning of the Rhetian-Hettangian Corna Platform, the very thick synrift succession of the Medolo Group accumulated in the Val Trompia-Sebino Basin, whereas the coeval reduced sequence of the Rezzato Encrinite and the overlying Botticino Corso Rosso covered the Botticino High, subsequent to the Early Sinemurian. The ammonite biohorizons and assemblages recognised are quite well integrated and correlable with either the NW European standard zonation or the different zonations proposed for the Tethyan Realm.
Źródło:
Volumina Jurassica; 2009, 7, 1; 9-18
1896-7876
1731-3708
Pojawia się w:
Volumina Jurassica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Role of Temperature on the Magnetization Process in CoFeZrB/FeCuNbMoSiB Hybrid Ferromagnets
Autorzy:
Dobák, S.
Füzer, J.
Kollár, P.
Powiązania:
https://bibliotekanauki.pl/articles/1032660.pdf
Data publikacji:
2017-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.Bb
75.50.Kj
75.50.Tt
75.60.Ch
75.60.Ej
75.30.Gw
85.70.-w
Opis:
The study presents magnetization process behaviour versus operating temperature up to 100°C in dual-phase ferromagnets in the light of their complex permeability spectra and energy losses from quasi-dc regime up to about 1 MHz upon defined peak induction. The samples consist of two Co- and Fe-based ball-milled-ribbon powders mixed in the same mass ratio. The magnetic characterization has been carried out by a digital hysteresisgraph-wattmeter using complex permeability approach to the linear material.
Temperature invoked reduction of anisotropy leads to the decrease of hysteresis losses and significantly affects the low-frequency part of permeability and losses that is ascribed to domain wall movement. The high-frequency behaviour remains unchanged with respect to increase of temperature.
Źródło:
Acta Physica Polonica A; 2017, 131, 4; 696-698
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of multi-task on symptomatic patient affected by chronical vestibular disorders
Autorzy:
Regrain, E.
Regnault, P.
Kirtley, Ch.
Shamshirband, S.
Chays, A.
Boyer, F.-C.
Taiar, R.
Powiązania:
https://bibliotekanauki.pl/articles/307436.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
rehabilitacja
posturograf
zdolność
postawa człowieka
rehabilitation
posturography
ability
cognitive skills
vestibular disorders
anxiety posture balance
Opis:
Purpose: After a vestibular deficit some patients may be affected by chronical postural instability. The aim of this study was to identify the emotional and cognitive factors of these symptomatic patients. In particular, the double cognitive task and the anxiety disorder were identified by our patients. Through a retrospective study, 14 patients (65.4 ±18 years) participated in the experiment. Method: The experimentation consists in the study of the standing position of our patients through the aggregate of the trajectories of the center of pressure (COP) using a force plate device. With the aim of isolating the emotional and cognitive influence, this experimentation was defined in two conditions. In the first one, the patients were asked to maintain their balance without additional tasks. In the second one, the patients were submitted to an additional cognitive arithmetic task. The stabilogram surface, length (the forward and backward displacement distance during deviations in COP), lateral and the antero-posterior deviations were assessed. Results: Our results showed an increase of postural instability of patients affected by chronical vestibular disorders when submitted to the double task. The patients submitted to the cognitive task present a larger surface of activity in comparison with the free-task one (Wilcoxon test p-value equals p = 0.0453). In addition, their displacements inside this area are more important (p = 0.0338). The COP of all our patients deviated forward in the presence of the double task. Conclusion: The increase in instability during the double cognitive task could be explained by an additional stress caused by the desire to make a success of the cognitive task.
Źródło:
Acta of Bioengineering and Biomechanics; 2016, 18, 3; 123-129
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-100 z 133

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