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    Wyświetlanie 1-13 z 13
    Tytuł:
    Study of an Ultra-Compact, Repetitive Marx Generator for High-Power Microwave Applications
    Autorzy:
    Bischoff, R.
    Charon, R.
    Duperoux, J.
    Martin, B.
    Pinguet, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1807853.pdf
    Data publikacji:
    2009-06
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    84.30.Ng
    84.32.Hh
    84.32.Tt
    84.60.Ve
    Opis:
    The need for repetitive high-power microwave systems, for instance within the scope of convoy protection, requires the availability of compact, repetitive pulsed-power generators. The development and the first experimental results of an upgraded balanced ISL Marx generator for future repetitive operations at pulse repetition frequencies in the order of 100 Hz are introduced. A key objective is to keep the fundamental modular coaxial concept by reason of its scalability and compactness. Simulation models were developed under the PSpice software package in order to investigate the charging and discharging phases of the Marx generator and also to determine the design criteria for repetitive operations. The charging resistors were replaced by ultracompact inductors for rapid charging, being able to withstand pulsed voltages up to 60 kV and pulsed currents up to 1.4 kA during the discharge phase. An improved type of strontium-titanate high-voltage ceramic capacitor was successfully tested experimentally up to 70 kV. Each new elementary stage of the Marx generator consists of eight 1.1 nF sectors of a cylinder capacitors mounted in parallel, two charging inductors of about 17.8 μH and two halves of spherical spark gaps. The pressurized self-triggered gas switches are arranged along the axis for fast consecutive breakdown thanks to the UV radiation emitted during the breakdown in each gap. The stages are installed in individual fibreglass housings. First experimental results of a 4-stage Marx generator in repetitive operation, driven by a 4 kW capacitor charging power supply up to a maximum voltage of 40 kV, are presented.
    Źródło:
    Acta Physica Polonica A; 2009, 115, 6; 964-966
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Screening commercial drivers for obstructive sleep apnea: Validation of STOP-Bang questionnaire
    Autorzy:
    Popević, Martin B.
    Milovanović, Andjela
    Nagorni-Obradović, Ljudmila
    Nešić, Dejan
    Milovanović, Jovica
    Milovanović, Aleksandar P.
    Powiązania:
    https://bibliotekanauki.pl/articles/2161889.pdf
    Data publikacji:
    2017-07-14
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    sleep apnea
    questionnaires
    polysomnography
    obstructive
    validation studies
    commercial drivers
    Opis:
    Objectives The main aim has been to examine psychometric properties of STOP-Bang (snoring, tiredness, observed apnea, high blood pressure, body mass index (BMI), age, neck circumference, male gender) scoring model (Serbian translation), an obstructive sleep apnea (OSA) screening tool, in a sample of commercial drivers. Material and Methods After formal translation, validation was performed on a sample of bus and truck drivers evaluating test-retest reliability, construct and criterion validity. Overnight polysomnography or cardiorespiratory polygraphy were used for OSA diagnosis purposes. Results One hundred male participants, 24–62 years old, were included. STOP-Bang classified 69% as potential OSA patients. Polysomnography identified OSA in 57% of the sample. Test-retest reliability (Cohen’s κ = 0.89) was adequate. STOP-Bang score was significantly correlated to apnea-hypopnea index (AHI) and OSA severity. Sensitivity was 100% for AHI ≥ 15, highest specificity was 53.5% (AHI ≥ 5). Conclusions STOP-Bang showed good measurement properties, supporting its further use in OSA screening of commercial drivers. Int J Occup Med Environ Health 2016;30(5):751–761
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2017, 30, 5; 751-761
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Authors’ response (November 28, 2017) to the letter to the Editor concerning the paper “Screening commercial drivers for obstructive sleep apnea: Validation of STOP-Bang questionnaire”
    Autorzy:
    Popević, Martin B.
    Milovanović, Andjela
    Nagorni-Obradović, Ljudmila
    Nešić, Dejan
    Milovanović, Jovica
    Milovanović, Aleksandar P.
    Powiązania:
    https://bibliotekanauki.pl/articles/2162021.pdf
    Data publikacji:
    2018-10-24
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    sleep apnea
    questionnaires
    polysomnography
    obstructive
    validation studies
    commercial drivers
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2018, 31, 5; 699-701
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The elusiveness of progressive masculinity: Gender differences in conceptualizations of nontraditional gender roles
    Autorzy:
    Calton, Jenna M.
    Heesacker, Martin
    Perrin, Paul B.
    Powiązania:
    https://bibliotekanauki.pl/articles/438029.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet im. Adama Mickiewicza w Poznaniu
    Tematy:
    masculinity
    femininity
    progressive
    nontraditional
    gender roles
    Opis:
    Traditional masculinity has been thoroughly explored in psychological research, but its counterpart, progressive masculinity, has undergone relatively little scientific investigation. To determine whether this lack of attention to or understanding of progressive masculinity is mirrored more largely in mainstream culture, we examined how men and women conceptualize and experience gender roles in their everyday lives. Participants were randomly assigned to describe a time in which they had behaved either traditionally or progressively with regard to their gender. Over 80% of men and women in the traditional condition and women in the progressive condition provided condition-appropriate examples. However, men in the progressive condition only provided progressive examples 17% of the time, suggesting that many men may not have an understanding of progressive masculinity. Additional themes, implications, and directions for research on progressive masculinity are discussed.
    Źródło:
    Journal of Gender and Power; 2014, 2; 37-58
    2391-8187
    Pojawia się w:
    Journal of Gender and Power
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Non-infectious Health Risks of Young Adults Serving in International Volunteer Services
    Autorzy:
    Küpper, Thomas
    Neppach, K.
    Martin, J.
    Heggie, Travis
    Rieke, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/2098194.pdf
    Data publikacji:
    2020-12-11
    Wydawca:
    Państwowa Wyższa Szkoła Zawodowa w Tarnowie
    Tematy:
    wolontariat
    bezpieczeństwo
    zdrowie
    podróże
    wypadki
    przemoc
    stres
    aktywność seksualna
    volunteer service
    safety
    health
    pre-travel advice
    accidents
    violence
    psychosocial stress
    sexual activity
    Opis:
    Introduction: Young people serving as volunteers in international projects show a different risk profile to “normal” travellers. Data are scarce. While infectious risks were published elsewhere we focus now on non-infectious risks. Material and methods: 153 questionnaires, obtained from volunteers returning from their project were evaluated. Questions included age, situation abroad (living space and work), travel experience, region of the project, language skills, pre-travel advise, type of problems abroad (accidents, traffic, violence, robbery, sexual assault, psychosocial stress etc.). Results: Several factors, normally not included in pre-travel advice, cause significant psychosocial stress which decreases a bit during the stay. Special problems are insufficient language skills, (subjective) safety at night, traffic / transport, and violence. Psychosocial stress was the most important reason to stop the activity and to return home ahead of schedule (4% of all volunteers). Conclusions: Pre-travel advice of young volunteers should include psychosocial factors and other topics additional to infectious diseases, vaccination, and hygiene. Sufficient training in common but minor medical problems (headache, sunburn, minor wounds) is a “must”. A comprehensive advice and training may need two days and may be realized in groups of 5 to 12 participants. Health and safety should become a more important topic of all projects.
    Źródło:
    Health Promotion & Physical Activity; 2020, 13, 4; 29-39
    2544-9117
    Pojawia się w:
    Health Promotion & Physical Activity
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of the photosynthetic pathway on the hydrogen isotopic profile of glucose
    Autorzy:
    Zhang, B.
    Billault, I.
    Li, X.
    Mabon, F.
    Remaud, G.
    Martin, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/146974.pdf
    Data publikacji:
    2002
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    deuterium
    glucose
    isotope ratio
    plant metabolism
    SNIF-NMR
    Opis:
    The SNIF-NMR method (site-specific natural isotope fractionation studied by Nuclear Magnetic Resonance) was used to examine the isotopic profile of glucoses derived from plants with different photosynthetic pathways. It is shown that the type of photosynthetic metabolism, either C3 (beet-root, orange, grape), C4 (maize, sugar-cane) or CAM (pineapple), exerts a strong influence on the deuterium distribution in the sugar molecules. The isotopic profile also depends, secondarily, on the physiological status of the precursor plant. Consequently, the isotopic fingerprint of glucose may be a rich source of information in mechanistic comparisons of metabolic pathways. Moreover, from an analytical point of view, it may provide complementary criteria with respect to the ethanol probe for origin inference of sugars.
    Źródło:
    Nukleonika; 2002, 47,suppl.1; 63-65
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Petrology and geochemistry of rapakivi-type granites from the crystalline basement of NE Poland
    Autorzy:
    Bagiński, B.
    Duchense, J.
    Auwera, J. van der
    Martin, H.
    Wiszniewska, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2059326.pdf
    Data publikacji:
    2001
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Mazury complex
    rapakivi-type granites
    jotunite
    granite modelling
    Opis:
    80 rock samples from drill-cores at 8 localities in the Mazury complex (Polish part of the crystalline East European Craton), representing rock types from monzodiorites to leucogranites, were studied for major, trace and REE elements by XRF and ICP-MS methods. The range in composition of the investigated rocks varies from 46 to 76% SiO2 contents. All of them show similar REE distributions, which suggests that they are genetically linked. They also plot along a major trend with many similarities to the jotunitic liquid line of descent defined in AMCG rocks from Rogaland (Norway). Each group of rocks has however its own specific pattern of elements.
    Źródło:
    Geological Quarterly; 2001, 45, 1; 33-52
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Geomorphic dynamics of gullies developed in sandy slopes of Central Spain
    Autorzy:
    Lucía, A.
    Martín-Duque, J. F.
    Laronne, J. B.
    Sanz-Santos, M. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/294675.pdf
    Data publikacji:
    2011
    Wydawca:
    Stowarzyszenie Geomorfologów Polskich
    Tematy:
    sand
    gullies
    Terrestrial Laser Scanner (TLS)
    Reid bedload sampler
    erosion-runoff plots
    Spain
    Opis:
    Gullies developed on sandy lithologies are scarce. Such landforms have developed in the sandy deposits of the Cretaceous 'Utrillas' facies within the Segovia province of Central Spain. They appear at the slopes of a group of mesas and cuestas located at the edge of the northern piedmont of the Guadarrama Mountains of the Spanish Central System. The activity of the different geomorphic processes acting in these gullies, as well as their connectivity, are being characterized and quantified. This study was preceded by reconnaissance methods, whereas presently technologically advanced and more accurate techniques are being utilized. The new methods are applied in an experimental catchment (1.26 ha). They include: i) an automatic Reid-type (formerly termed Birkbeck) slot bedload sampler for continuous monitoring of bedload flux and for continuous sampling of bedload; siphons for sampling the suspended load; and a Parshall flume to monitor water discharge. Jointly, these instruments allow to study the fluvial dynamics at the catchment mouth; ii) topographic surveys undertaken by a Terrestrial Laser Scanner (TLS) to quantify the activity of gravitational, overland flow and fluvial processes in different sediment source areas within the gully basin; iii) micro runoff and erosion plots to monitor the infiltration and erosive response of different Hydrologic Response Units (HRU) comprising the interior of the catchment. This ensemble of novel methods has started providing patterns of sediment movement within the gully system.
    Źródło:
    Landform Analysis; 2011, 17; 91-97
    1429-799X
    Pojawia się w:
    Landform Analysis
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Taxonomic implications of the residual colour patterns of ampullinid gastropods and their contribution to the discrimination from naticids
    Autorzy:
    Caze, B.
    Merle, D.
    Le Meur, M.
    Pacaud, J.-M.
    Ledon, D.
    Sain Martin, J.-P.
    Powiązania:
    https://bibliotekanauki.pl/articles/20897.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    taxonomy
    residual colour pattern
    ampullinid gastropod
    gastropod
    contribution
    discrimination
    naticid
    Ampullinidae
    Naticidae
    shell
    evolution
    Cainozoic
    Europe
    Ampullina
    Globularia
    Crommium
    Amaurellina
    Pachycrommium
    Amauropsina
    Ampullonatica
    Eocernina
    Ampullinopsis
    Vanikoropsis
    Pictavia
    Ampullospira
    Deshayesia
    Cernina
    Opis:
    The diversity of residual colour patterns is revealed for the first time in the European fossil Ampullinidae. The colour patterns were studied under Ultraviolet (UV) light in approximately 3100 specimens belonging to 83 species, 12 genera (Ampullina, Globularia, Crommium, Amaurellina, Pachycrommium, Amauropsina, Ampullonatica, Eocernina, Ampullinopsis, Vanikoropsis, Pictavia, and Ampullospira) and three subgenera (Globularia, Deshayesia, and Cernina within the genus Globularia). Forty−six Cainozoic species revealed residual colour patterns and 29 of them, belonging to six genera (Ampullina, Globularia, Crommium, Amaurellina, Pachycrommium, Amauropsina), are described herein as examples representing the entire diversity of the encountered colour patterns. These patterns are most diverse during the Middle Eocene coincident with the period of highest taxonomic diversity of the Ampullinidae. Four basic classes, regarded as containing possible homologous colour patterns in terms of pigments incorporation modalities, are proposed. Class I, a fluorescent wide diffuse area or spiral stripes, occurs in most of the species, while the three others are more peculiar. Class II, fluorescent axial zigzagging stripes, Class III, fluorescent axial to slightly opisthocline stripes or segments, and Class IV, fluorescent patches forming axial segments by coalescence, allow an easy distinction between the genera Globularia, Pachycrommium, and three peculiar species of Ampullina. The bauplan of the colour patterns revealed in Globularia is very similar to that of the single extant species, Globularia (Cernina) fluctuata. This supports the view of previous authors who classified them in the same genus. Furthermore, at the family level, the peculiar residual patterns belonging to classes II, III, and IV have not been observed in naticid gastropods. Thus our results for the Cainozoic fossil record are consistent with the conclusions based on anatomy and feeding habits, namely that ampullinid gastropods, regarded for a long time as belonging to the family Naticidae, constitute a family apart.
    Źródło:
    Acta Palaeontologica Polonica; 2011, 56, 2
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Efficacy comparison of intraperitoneal anaesthesia and post-operative analgesia regimens in laboratory rats
    Autorzy:
    Moreno-Mateo, F.
    García-Medrano, B.
    Álvarez-Barcia, A.
    Gayoso, M.J.
    Martín-Ferrero, M.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2087353.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    pain in rats
    anesthesia for rodents
    analgesia for rodents
    laboratory rats
    animal welfare
    Źródło:
    Polish Journal of Veterinary Sciences; 2020, 23, 1; 127-132
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    En bloc liver and pancreas transplantation after total pancreatectomy with autologous islet transplantation
    Autorzy:
    Generette, Gabriela S.
    Bachul, Piotr J.
    Golab, Karolina
    Basto, Lindsay
    Pyda, Jordan S.
    Borek, Peter
    Tibudan, Martin
    Anteby, Roi
    Perea, Laurencia
    Charlton, Michael
    Perez-Gutierrez, Angelica
    Jayant, Kumar
    Lucander, Aaron
    Matthews, Jeffrey B.
    Millis, J. Michael
    Fung, John
    Witkowski, Piotr
    Powiązania:
    https://bibliotekanauki.pl/articles/1196139.pdf
    Data publikacji:
    2020-11-23
    Wydawca:
    Gdański Uniwersytet Medyczny
    Tematy:
    Total Pancreatectomy with Autologous Islet Transplantation
    TPIAT
    liver and pancreas transplantation
    chronic pancreatitis
    Opis:
    We present a patient with intractable and debilitating pain secondary to chronic pancreatitis who was effectively treated with total pancreatectomy with islet autotransplantation (TPIAT). Islets engrafted into his liver significantly contributed to improved blood glucose control and quality of life. Subsequently, the patient developed alcohol related acute liver failure and en bloc liver and pancreas transplantation was performed to replace the failing liver with engrafted islets. Pancreas transplantation was required to resolve his life-threatening severe hypoglycemic episodes. Herein, we detail an innovative and multidisciplinary management of this complex medical problem.
    Źródło:
    European Journal of Translational and Clinical Medicine; 2020, 3, 2; 11-17
    2657-3148
    2657-3156
    Pojawia się w:
    European Journal of Translational and Clinical Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-13 z 13

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