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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:
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:
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:
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:
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:
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:
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:
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:
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:
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:
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:
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:
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:
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:
A robust predictive actuator fault-tolerant control scheme for Takagi-Sugeno fuzzy systems
Autorzy:
Witczak, P.
Witczak, M.
Korbicz, J.
Aubrun, Ch.
Powiązania:
https://bibliotekanauki.pl/articles/199920.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
fault diagnosis
fault identification
robust control
robust invariant set
predictive control
fault-tolerant control
diagnostyka błędu
identyfikacja błędów
diagnostyka predykcyjna
kontrola tolerancji błędu
Opis:
The paper deals with the problem of robust predictive fault-tolerant control for nonlinear discrete-time systems described by the Takagi-Sugeno models. The proposed approach is based on a triple stage procedure, i.e. it starts from fault estimation while the fault is compensated with a robust controller. The robust controller is designed without taking into account the input constraints related with the actuator saturation that may change due to its faulty behaviour. Thus, to check the compensation feasibility, the robust invariant set is developed, which takes into account the input constraints. If the current state does not belong to the robust invariant set, then suitable predictive control actions are performed in order to enhance the invariant set. This appealing phenomenon makes it possible to enlarge the domain of attraction, which makes the proposed approach an efficient solution for the fault-tolerant control. The final part of the paper shows an illustrative example regarding the application of the proposed approach to the twin-rotor system.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2015, 63, 4; 977-987
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of method for extractive spectrophotometric determination of Fe(III) with 2-Hydroxy-1-Naphthalene carboxaldehyde phenyl hydrazone as an analytical reagent
Autorzy:
Ratnamala, P. S.
Lokhande, R. S.
Utkarsha, M. Ch.
Powiązania:
https://bibliotekanauki.pl/articles/411571.pdf
Data publikacji:
2013
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Iron Spectrophotometric determination
ethyl acetate
2-Hydroxy-1-Naphthalene carboxaldehyde phenyl hydrazone
Opis:
A spectrophotometric method has been developed for the determination of Fe(III) using 2-Hydroxy-1-Naphthalene carboxaldehyde phenyl hydrazone as an extractive reagent. The reagent forms a coloured complex, which has been quantitatively extracted into ethyl acetate at pH 6. The method obeys Beer’s law over arrange from 1 to 7 ppm. The Molar absorptivity and Sandell’s sensitivity were 0.31 × 104 L mol-1cm-1 and 0.13 μg cm-2 respectively. The proposed method is very sensitive and selective. The method has been successfully applied to synthetic and commercial samples.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2013, 9, 1; 7-12
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of method for extractive spectrophotometric determination of Cu(II) with 2-Hydroxy-1-Naphthalene carboxaldehyde phenyl hydrazone as an analytical reagent
Autorzy:
Ratnamala, P. S.
Lokhande, R. S.
Utkarsha, M. Ch.
Powiązania:
https://bibliotekanauki.pl/articles/412128.pdf
Data publikacji:
2013
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Copper Spectrophotometric determination
n-Butanol
2-Hydroxy-1-Naphthalene carboxaldehyde phenyl hydrazine
Opis:
A spectrophotometric method has been developed for the determination of Cu(II) using 2-Hydroxy-1-Naphthalene carboxaldehyde phenyl hydrazone as an extractive reagent. The reagent forms a coloured complex, which has been quantitatively extracted into n-butanol at pH 9.2. The method obeys Beer’s law over arrange from 1 to 10 ppm. The Molar absorptivity and Sandell’s sensitivity were 0.97 × 104 L mol-1cm-1 and 0.26 μg•cm-2 respectively. The proposed method is very sensitive and selective. The method has been successfully applied to synthetic and commercial samples.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2013, 9, 1; 1-6
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
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:
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:
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:
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:
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:
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:
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:
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:
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:
Ekspedycja IODP 360 : pierwszy etap odwiertu do płaszcza Ziemi
IODP Expedition 360 : first stage of drilling into Earth’s Mantle
Autorzy:
Ciążela, J.
Dick, H. J. B.
Mac-Leod, Ch.
Blum, P.
Powiązania:
https://bibliotekanauki.pl/articles/2075550.pdf
Data publikacji:
2016
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Moho
płaszcz
skorupa dolna
wyprawa 360
IODP
Atlantis Bank
mantle
lower crust
expedition 360
International Ocean Discovery Program
Opis:
The aim of this paper is to provide a report on the IODP expedition 360 to the Polish geoscientific community. Expedition 360 to the Atlantis Bank along the Southwest Indian Ridge was Leg 1 of the SloMo Project. The primary objective of the SloMo Project is to test competing hypotheses on the nature of the Moho at the slow-spreading oceanic lithosphere. Based on a seismic survey and geologic mapping, the Moho beneath Atlantis Bank is believed to represent a serpentinization front, and not an igneous boundary between gabbro andperidotite. Expedition 360 started on November 30,2015 in Colombo (Sri Lanka), and ended on January 30,2015 in Port Louis (Mauritius). Hole U1473A was drilled 790 m through massive gabbro. Core recovery ranges from 44 to 96% towards the bottom of the hole, where excellent drilling conditions occurred. This deepest single-leg basement hole drilled into ocean crust is in overall good condition andcan be re-entered at Leg 2. For the first time, a Polish nominee has been selectedfor the scientific party of an oceanic IODP expedition. The mantle drilling project raised much attention in the Polish media. One hundred rock samples have been collected to investigate in Poland.
Źródło:
Przegląd Geologiczny; 2016, 64, 11; 889--895
0033-2151
Pojawia się w:
Przegląd Geologiczny
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:
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:
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:
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:
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:
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
Tytuł:
Effects of magnetic field irradiation on broccoli seed with accelerated aging
Wpływ działania pola magnetycznego na przyspieszenie starzenia się nasion brokuła
Autorzy:
Martinez, F.R.
Pacheco, A.D.
Aguilar, C.H.
Pardo, G.P.
Ortiz, E.M.
Powiązania:
https://bibliotekanauki.pl/articles/36962.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
magnetic field
irradiation
broccoli
seed
aging
physiological quality
biostimulation
Opis:
In order to improve the physiological quality of aged broccoli seed (Brassica oleracea var. Waltham29), in this study a variable magnetic field (VMF) of 3.6 mT, 60 Hz by 5min was used as pre-sowing treatment. The accelerated aging treatment was applied for 0, 48 and 72 h (AA0h, AA48h and AA72h) and then the VMF treatment, under a randomised complete block design with 4 replications of 30 seeds. For seeds aged for 72 h a final germination of 20% was obtained, whereas without magnetic stimulation it was null. However, the magnetic bio-stimulation in 48 h aged seeds was significantly negative, reducing the final germination by 45.83% compared to the treatment without magnetic field, while the VMF effects in unaged seed were zero. The variable magnetic field effects depended on the seed aging time, resulting in positive, negative and null outcomes (responses) in vigour variables.
W celu uzyskania poprawy właściwości fizjologicznych nasion brokuła (Brassica oleracea var. Waltham 29) poddanych przyspieszonemu starzeniu, zastosowano przedsiewne zmienne pole magnetyczne (VMF) o wartości 3,6 mT, 60 Hz przez 5 min. Proces przyspieszonego starzenia prowadzono przez 0, 48 and 72 h (AA0h, AA48h i AA72h), po czym nasiona poddawano działaniu VMF. Badanie prowadzono metodą bloków losowych w 4 powtórzeniach po 30 nasion. Przyspieszone starzenie przez 72 godziny spowodowało wzrost wskaźnika kiełkowania nasion o 20%, podczas gdy dla próby bez działania pola magnetycznego wynik był zerowy. W przypadku nasion poddanych starzeniu przez 48 godzin efekt stymulacji magnetycznej był negatywny, powodując spadek końcowego wskaźnika kiełkowania o 45,83% w porównaniu do wariantu bez pola magnetycznego. Dla nasion niepoddawanych starzeniu wpływ działania VMF był zerowy. Wpływ działania zmiennego pola magnetycznego na nasiona był uzależniony od czasu starzenia nasion, powodując pozytywne, negatywne lub zerowe zmiany w wartościach wskaźników ich wigoru.
Źródło:
Acta Agrophysica; 2014, 21, 1
1234-4125
Pojawia się w:
Acta Agrophysica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Study On The Fabrication Of Iron Powder From Forging Scale Using Hydrogen
Próby wytwarzanie proszku żelaza metodą redukcji zgorzeliny pochodzącej z procesów kucia za pomocą wodoru
Autorzy:
Shin, S. M.
Lee, D.-W.
Yun, J.-Y.
Kang, Ch.-Y.
Wang, J.-P.
Powiązania:
https://bibliotekanauki.pl/articles/350946.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
forging scale
hydrogen partial pressure
hematite
iron powder
kucie za pomocą wodoru
hematyt
redukcja zgorzeliny
proszek żelaza
Opis:
This study was conducted to investigate the effect of hydrogen content, temperature, reaction time for the reduction of forging scale which is mainly composed of hematite (Fe2O3). All reductive reactions were performed over the temperature range of 700 to 1200°C as well as 0.1 to 1 atm of hydrogen partial pressures. The results showed that the mechanism for the reduction of iron oxides using hydrogen gas was not a simple process, but proceeded in multiple reduction stages thermodynamically. The iron oxide was almost completely reduced to metallic iron powder with 91 wt.% of iron content in the forging scale at 0.1 atm of hydrogen partial pressure. The content of iron was however found to be increased with increasing hydrogen partial pressure from 0.1 to 1 atm with regardless of temperatures. The metallic iron powder was obtained with the mean size of 100 μm and more porous structure was observed.
Źródło:
Archives of Metallurgy and Materials; 2015, 60, 2B; 1547-1549
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
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:
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:
Structural, 1/f Noise and MOKE Characterization of Vicinal La$\text{}_{0.7}$Sr$\text{}_{0.3}$MnO$\text{}_{3}$ Thin Films
Autorzy:
Méchin, L.
Perna, P.
Saïb, M.
Belmeguenai, M.
Flament, S.
Barone, C.
Routoure, J.-M.
Simon, Ch.
Powiązania:
https://bibliotekanauki.pl/articles/2047216.pdf
Data publikacji:
2007-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.30.Gw
75.47.Lx
75.60.-d
75.60.Jk
75.70.Ak
Opis:
This paper presents some structural, magnetic and electrical properties of 40 nm and 75 nm thick La$\text{}_{0.7}$Sr$\text{}_{0.3}$MnO$\text{}_{3}$ thin films deposited on vicinal SrTiO$\text{}_{3}$(001) substrates. The vicinal angles were 2, 4, 6, 8, and 10º from the [001] direction towards [110]. Standard SrTiO$\text{}_{3}$(001) substrates were used for comparison and for the growth condition optimization. Structural properties were studied by X-ray diffraction, which indicated that the LSMO films grew with their (001) axis coincident with the (001) axis of the substrate. The surface morphology was carefully studied by atomic force microscopy in tapping mode. Very smooth films and regular step-terrace structures on the La$\text{}_{0.7}$Sr$\text{}_{0.3}$MnO$\text{}_{3}$ surfaces could be observed. The root mean square roughness measured in 2μ m×2μ m images was in the 0.130-0.580 nm range for all angles and both thicknesses. Superconducting quantum interference device magnetometer measurements revealed a Curie temperature in the 340-350 K range and magneto-optical Kerr microscopy enabled magnetic domain imaging and hysteresis loop measurements at 300 K. A uniaxial easy magnetization direction was obtained at 300 K for angles above 4º, with the easy axis along the steps. Finally, preliminary 1/f noise measurements were performed at 300 K for bias currents along and perpendicular to the step direction, showing a noise level as low as that we typically measured on standard SrTiO$\text{}_{3}$(001) substrates. All these results are promising for the future realization of room-temperature devices making use of the anisotropy of the magnetization.
Źródło:
Acta Physica Polonica A; 2007, 111, 1; 63-70
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:
Badania okresu gwarancyjnego dla systemu wieloskładnikowego, w którym zachodzą interakcje uszkodzeniowe
Research on warranty interval of multi-component system with failure interaction
Autorzy:
Cheng, Z. H.
Bai, Y. S.
Cai, L. Y.
Wang, L. Ch.
Li, P. J.
Chen, L.
Powiązania:
https://bibliotekanauki.pl/articles/301278.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
okres gwarancyjny
koszty
dostępność
interakcje uszkodzeniowe
wieloelementowy
warranty period
cost
availability
failure interaction
multi-component
Opis:
W oparciu o analizę interakcji uszkodzeniowych, przyjęto dla systemu wieloskładnikowego politykę gwarancyjną obejmującą niepełną odnowę profilaktyczną. Zbadano średnią intensywność uszkodzeń dla każdego okresu gwarancyjnego oraz skonstruowano modele kosztów obsługi gwarancyjnej oraz dostępności biorąc pod uwagę intensywność uszkodzeń interakcyjnych. Jako przykład podano projekt okresu gwarancyjnego, który może potwierdzić poprawność przyjętego modelu oraz przedstawiono zalety takiego projektu. W badaniach opracowano technikę i metody ustalania okresu gwarancyjnego dla systemów wieloskładnikowych, które stanowią istotny wkład do teorii gwarancji.
Based on the analysis of failure interaction, imperfect preventive warranty policy is adopted for the multi-component system. Average failure rate of each warranty interval is studied and warranty cost model and availability model are built as viewed from interactive failure rate. Then Warranty period project is brought forward as an example, which can validate the feasibility of model and show the advantage of the project. The research can provide technique and methods for determining Warranty Period of multi-component system, which further enriches and perfects the warranty theory.
Źródło:
Eksploatacja i Niezawodność; 2011, 4; 49-55
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
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:
High intensity LED light in lettuce seed physiology (Lactuca sativa L.)
Zastosowanie światła LED wysokiej intensywności w fizjologii nasion sałaty (Lactuca sativa L.)
Autorzy:
Pardo, G.P.
Aguilar, C.H.
Martinez, F.R,.
Pacheco, A.D.
Martinez, C.L.
Ortiz, E.M.
Powiązania:
https://bibliotekanauki.pl/articles/36994.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
high intensity
LED light
light intensity
lettuce
seed
plant physiology
Lactuca sativa
plant development
plant growth
Opis:
In order to improve the physiology of plants, this research evaluated the effect of high-intensity LED light (red, blue and green) on the following variables: germination (PG), hypocotyl length (HL), fresh (FW) and dry (DW) weight, in three types of lettuce seed (White Boston, Romana and Black Simpson). Exposure times with colour light were 12, 6 and 3h, with a complement of time for treatments with 6 and 3h of white LED light. We used a completely randomised design with four replications of 30 seeds. Treatments with green and red light to 12h had increases above 90% in HL against the control for the three varieties. The blue light treatment (3h) increased 23% in FW White Boston variety and the red light (3h) increased 14% the DW variable in Roman variety, compared to the control. In this study, treatments with colour light presented results above the control; however, a treatment with a single type of light is not optimal to improve plant physiology. The physiological responses evaluated showed variation related to the genotype of seed and to the time of exposure to high-intensity LED light, so this type of light is a viable option for improving the physiology of plants.
W celu uzyskania poprawy fizjologii roślin, w badaniach dokonano oceny wpływu światła LED wysokiej intensywności (czerwone, niebieskie i zielone) na następujące zmienne: kiełkowanie (PG), długość hipokotylu (HL), świeżej (FW) i suchej (DW) masy nasion trzech odmian sałaty (White Boston, Romana i Black Simpson). Czasy naświetlania światłem barwnym wynosiły 12, 6 and 3 h, z uzupełniającym doświetlaniem wariantów z czasami 6 i 3 h białym światłem LED. Zastosowano kompletnie zrandomizowany układ doświadczenia, w czterech powtórzeniach po 30 nasion. Warianty ze światłem zielonym i czerwonym oraz czasami naświetlania do 12 h wykazały ponad 90% wzrost HL w stosunku do kontroli dla trzech odmian. W wariancie ze światłem niebieskim (3 h) uzyskano 23% wzrost parametru FW u odmiany White Boston, a w wariancie ze światłem czerwonym (3 h) 14% wzrost zmiennej DW u odmiany Roman, w porównaniu do kontroli. W badaniach zastosowanie naświetlania światłem barwnym dało lepsze wyniki niż w przypadku kontroli, jednak naświetlanie jednym rodzajem światła nie jest optymalne dla uzyskania poprawy fizjologii roślin. Oceniane reakcje fizjologiczne zmieniały się w zależności od genotypu nasion i czasu naświetlania światłem LED wysokiej intensywności, tak więc zastosowanie tego typu światła stanowi możliwą opcję w poprawie fizjologii roślin.
Źródło:
Acta Agrophysica; 2013, 20, 4
1234-4125
Pojawia się w:
Acta Agrophysica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
At the Tip of an MeV Beam: Provoking Cells and Performing Tomographic Imaging
Autorzy:
Pallon, J.
Arteaga-Marrero, N.
Nilsson, Ch.
Elfman, M.
Kristiansson, P.
Nilsson, C.
Wegdén, M.
Olsson, M.
Åkerström, B.
Powiązania:
https://bibliotekanauki.pl/articles/1808531.pdf
Data publikacji:
2009-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
07.79.-v
29.40.Wk
87.53.-j
87.53.Ay
25.40.Cm
29.30.Ep
29.30.Kv
61.43.Gt
Opis:
Biological applications of ion beams have recently become a new important research field using single ion hit facilities to study individual living cells and their response to the hit of a counted number of ions. One motivation is the search for a better understanding of the fundamental processes taking place in cells and organs as a result of irradiation. Another comes from the increasing interest in using high energy protons and heavy ions as a modality for radiotherapy of deep seated tumours. In the view of treatment efficiency, study of cell culture behaviour under controlled radiation experiments, and in different chemical environments at single ion hit facilities, is a first step towards a better understanding of the processes. Tomographic techniques are applicable to situations where you need information of the inside of an object but do not want to section it into thin slices or cannot do it. Using focused MeV ion beams for tomography restricts the sample size to the order of 10-100 μm, depending of the initial energy. On the other hand, the ability to focus at a sub-micrometer level makes ion beams well suited for analyses of small sized objects as cells, spores, etc. The scanning transmission ion microscopy mode of tomography gives the mass density and corresponding morphological structure of holes and pores. It can then be used to correct the results from the other mode, particle induced X-ray emission tomography. Here is discussed a porosity analysis of bentonite clay that is planned to form an important buffer zone around canisters filled with spent nuclear reactor fuel waste deposited 500 m underground in Sweden.
Źródło:
Acta Physica Polonica A; 2009, 115, 2; 501-506
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
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
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