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Wyszukujesz frazę "Keller, M." wg kryterium: Autor

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    Wyświetlanie 1-14 z 14
    Tytuł:
    Tracking Exercise Motions of Older Adults Using Contours
    Autorzy:
    Havens, T C
    Alexanderson, G L
    Abbott, C C
    Keller, J M
    Skubic, M
    Rantz, M
    Powiązania:
    https://bibliotekanauki.pl/articles/108766.pdf
    Data publikacji:
    2009
    Wydawca:
    Społeczna Akademia Nauk w Łodzi
    Tematy:
    Computer vision
    human factors
    human motion capture
    swarm optimization
    contour extraction
    Opis:
    In this paper we describe the development of a novel markerless motion capture system and explore its use in documenting elder exercise routines in a health club. This system uses image contour tracking and swarm intelligence methods to track the location of the spine and shoulders during three exercises — treadmill, exercise bike, and overhead lateral pull-down. Validation results show that our method has a mean error of approximately 2 degrees when measuring the angle of the spine or shoulders relative to the horizontal. Qualitative study results demonstrate that our system is capable of providing important feedback about the posture and stability of elders while they are performing exercises. Study participants indicated that feedback from our system would add value to their exercise routines.
    Źródło:
    Journal of Applied Computer Science Methods; 2009, 1 No. 2; 21-42
    1689-9636
    Pojawia się w:
    Journal of Applied Computer Science Methods
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Identification of four new est-based markers on the apple (Malus × domestica) genetic map
    Autorzy:
    Keller-Przybylkowicz, S.
    Korbin, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1855.pdf
    Data publikacji:
    2014
    Wydawca:
    Instytut Ogrodnictwa
    Tematy:
    comparative mapping
    CAPS marker
    gene coding
    SSR marker
    ascorbic acid
    sugar metabolism
    apple
    Malus x domestica
    Źródło:
    Journal of Horticultural Research; 2014, 22, 1
    2300-5009
    Pojawia się w:
    Journal of Horticultural Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modes of ventilation in early tetrapods: costal aspiration as a key feature of amniotes
    Autorzy:
    Janis, C M
    Keller, J C
    Powiązania:
    https://bibliotekanauki.pl/articles/21209.pdf
    Data publikacji:
    2001
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    reptile
    bird
    skin
    carbon dioxide
    mammal
    ventilation
    anamniote
    amphibian
    rib
    tetrapod
    skull
    egg
    Opis:
    The key difference between amniotes (reptiles, birds and mammals) and anamniotes (amphibians in the broadest sense of the word) is usually considered to be the amniotic egg, or a skin impermeable to water. We propose that the change in the mode of lung ventilation from buccal pumping to costal (rib-based) ventilation was equally, if not more important, in the evolution of tetrapod independence from the water. Costal ventilation would enable superior loss of carbon dioxide via the lungs: only then could cutaneous respiration be abandoned and the skin made impermeable to water. Additionally efficient carbon dioxide loss might be essential for the greater level of activity of amniotes. We examine aspects of the morphology of the heads, necks and ribs that correlate with the mode of ventilation. Anamniotes, living and fossil, have relatively broad heads and short necks, correlating with buccal pumping, and have immobile ribs. In contrast, amniotes have narrower, deeper heads, may have longer necks, and have mobile ribs, in correlation with costal ventilation. The stem amniote Diadectes is more like true amniotes in most respects, and we propose that the changes in the mode of ventilation occurred in a stepwise fashion among the stem amniotes. We also argue that the change in ventilatory mode in amniotes related to changes in the postural role of the epaxial muscles, and can be correlated with the evolution of herbivory.
    Źródło:
    Acta Palaeontologica Polonica; 2001, 46, 2
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Calibration of temperature carbon isotopic effect (Peat Bogs Hala Izerska, Izerskie Mts. and Szrenica, Karkonosze Mts.)
    Autorzy:
    Skrzypek, G.
    Jędrysek, M. O.
    Keller-Sikora, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1186009.pdf
    Data publikacji:
    2005
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    izotopy trwałe
    węgiel
    temperatura
    profil torfowy
    stable isotopes
    carbon
    temperature
    peat core
    Opis:
    Dwa rdzenie torfowe pochodzące z Karkonoszy i Gór Izerskich zostały przeanalizowane pod kątem zależności składu izotopowego węgla i temperatury powietrza okresu wegetacji w miejscu poboru. Ciągłe rdzenie torfowe o długości całkowitej 160 i 195 cm, obejmujące ostanie 4500 lat, podzielono na próbki o miąższości 4-6 cm. Uzyskane wartości ?13C zawierają się w przedziale od -26,85 do -21,8‰. Próbki z poszczególnych części rdzeni zostały skorelowane wiekowo na podstawie datowań radiowęglowych (14C). Temperatura powietrza była monitorowana za pomocą automatycznych rejestratorów HOBO Oneset podczas sezonu wegetacyjnego 2004. Na podstawie analizy temperatur stwierdzono, że sezon wegetacyjny w Karkonoszach (punkt na wysokości 1240 m n.p.m.) trwa od 29 kwietnia do 7 października przy średniej temperaturze powietrza 9,2 stopni C, natomiast na Hali Izerskiej od 27 kwietnia do 7 października przy średniej temperaturze 10,4 stopni C (wysokość 857 m n.p.m., las) i 11,5stopni C (843 m n.p.m., otwarta przestrzeń, hala). Wzrost temperatury powietrza sezonu wegetacyjnego o 1stopień C powoduje zmianę wartości ?13C materii organicznej roślin torfotwórczych o -0,83‰
    Źródło:
    Polish Geological Institute Special Papers; 2005, 16; 123-126
    1507-9791
    Pojawia się w:
    Polish Geological Institute Special Papers
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Anatomy and relationships of the Triassic temnospondyl Sclerothorax
    Autorzy:
    Schoch, R R
    Fastnacht, M.
    Fichter, J.
    Keller, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/20469.pdf
    Data publikacji:
    2007
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    terrestrial vertebrate
    Temnospondyli
    Stereospondyli
    Triassic
    Buntsandstein
    anatomy
    Sclerothorax
    Germany
    Sclerothorax hypselonotus
    paleontology
    Opis:
    Recently, new material of the peculiar tetrapod Sclerothorax hypselonotusfrom the Middle Buntsandstein (Olenekian) of north−central Germany has emerged that reveals the anatomy of the skull and anterior postcranial skeleton in detail. Despite differences in preservation, all previous plus the new finds of Sclerothorax are identified as belonging to the same taxon. Sclerothorax is characterized by various autapomorphies (subquadrangular skull being widest in snout region, extreme height of thoracal neural spines in mid−trunk region, rhomboidal interclavicle longer than skull). Despite its peculiar skull roof, the palate and mandible are consistent with those of capitosauroid stereospondyls in the presence of large muscular pockets on the basal plate, a flattened edentulous parasphenoid, a long basicranial suture, a large hamate process in the mandible, and a falciform crest in the occipital part of the cheek. In order to elucidate the phylogenetic position of Sclerothorax, we performed a cladistic analysis of 18 taxa and 70 characters from all parts of the skeleton. According to our results, Sclerothorax is nested well within the higher stereospondyls, forming the sister taxon of capitosauroids. Palaeobiologically, Sclerothorax is interesting for its several characters believed to correlate with a terrestrial life, although this is contrasted by the possession of well−established lateral line sulci.
    Źródło:
    Acta Palaeontologica Polonica; 2007, 52, 1
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison of Optical Properties of Eu$\text{}^{3+}$ Ions in the Silica Gel Glasses Obtained by Different Preparation Techniques
    Autorzy:
    Legendziewicz, J.
    Stręk, W.
    Sokolnicki, J.
    Keller, B.
    Borzechowska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1945686.pdf
    Data publikacji:
    1996-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.20.Wc
    78.55.Hx
    71.55.Jv
    Opis:
    Silica sol-gel glasses doped with Eu$\text{}^{3+}$ ions were obtained by different preparation techniques. The absorption, emission and excitation spectra of the obtained glasses were measured in the range of 77-300 K. The energy level diagrams of Eu$\text{}^{3+}$ ions were derived. An intensity analysis of f-f transitions was performed. In particular, polymeric structure behaviour of europium compounds entrapped in silica gels glasses was temperature controlled during the preparation of glasses. Their optical properties were investigated.
    Źródło:
    Acta Physica Polonica A; 1996, 90, 2; 461-468
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Improvement of air quality in vehicle cabins by nanoparticle filtration
    Autorzy:
    Burtscher, H.
    Mayer, A.
    Loretz, S.
    Keller, A.
    Kasper, M.
    Czerwinski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/247534.pdf
    Data publikacji:
    2010
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    vehicle
    ecology
    filtration system
    nanoparticles
    Opis:
    A filter system is presented which allows the reduction of the concentration of ultrafine particles in vehicle cabins to very low levels. The original ventilation system is switched to the recirculation mode and all cabin intake air is supplied via a retrofitted filter system. Tests with a variety of different vehicles (from passenger cars to coaches) show the efficiency of the system. Filters incorporated in present ventilation systems remove large particles, for example pollen, but usually are inefficient for removing very small particles. This is demonstrated by Fig. l, where the particle number concentration outside and inside a car is plotted during a journey near Zurich. It is obvious that the concentrations inside and outside are more or less identical. All windows were closed during this measurement. Tests with a number ofdifferent all cars showed similar results. The filters included in today 's ventilation systems usually cannot remove nanoparticles, and so vehicle cabin indoor and outdoor nanoparticle concentrations are more or less identical. The nanocleaner, consisting of a very effident filter and a high performance blower, allows reduction of the particle concentration in the cabin from several hundreds of thousands or millions per cc. to a few thousand per cc., equivalent to remote woodland, the total exposed dose being reduced by some two orders of magnitude.
    Źródło:
    Journal of KONES; 2010, 17, 4; 79-88
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Air quality filtration in vehicle cabins
    Autorzy:
    Burtscher, H.
    Mayer, A.
    Loretz, S.
    Keller, A.
    Kasper, M.
    Czerwinski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/242450.pdf
    Data publikacji:
    2009
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    transport
    vehicles
    nanoparticle
    cabine filtration
    Opis:
    A filter system is presented which allows the reduction of the concentration of ultrafine particles in vehicle cabins to very low levels. The original ventilation system is switched to the recirculation mode and all cabin intake air is supplied via a retro fitted filter system. Tests with a variety of different vehicles (from passenger cars to coaches) show the efficiency of the system. Number concentration of particles inside and outside a car, the nanoparticle filtration system, fllter-efficiency: transmission for the new filter and for the filter loaded to apressure drop of 2.9 mbar, setup of the filter with integrated prefilter for course particles and blower, prototype of the filter system, main filter, prefilter and blower are included the system operated by an external control box, containing the drive electronics for the blower and displays for filter pressure drop and time meter, filter pressure drop as function of operating time in a highly polluted road tunnel, a possible solution to mount the filter system, particle concentration inside and outside the car (passenger car), concentration drops to very low levels, particle concentration inside and outside a passenger car with the filter turned on, two nanocleaner filter systems mounted in a school bus, filter system for buses installed in the luggage compartment are presented in the paper.
    Źródło:
    Journal of KONES; 2009, 16, 2; 59-69
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Integrated Communications System for the Remote Operation of Unmanned Aerial Vehicle
    Autorzy:
    Kurek, K.
    Keller, T.
    Modelski, J.
    Yashchyshyn, Y.
    Pastuszak, G.
    Darmetko, M.
    Bajurko, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/116567.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    communication system
    remote operation
    wireless system
    Opis:
    The aim of the paper is to present the concept of the integrated system dedicated for communication and remote operation of the unmanned aerial vehicle (UAV). In the paper the concept and realization of this kind of wireless communications system is presented. The system consists of two integrated solutions – unidirectional broadcast transmission of video, audio and data from UAV to the operators within the mobile command centre and two‐way communication with the telemetry and control subsystem. The systems are integrated within the single chassis and placed on the UAV to ensure proper operation of the flying robot. The specific elements of the system are presented as well as main requirements and connected with them development methods are also discussed in the paper.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2013, 7, 2; 235-242
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of inflammatory markers as predictors of hospital stay and unplanned readmission after colorectal surgery
    Autorzy:
    Krpata, David M.
    Keller, Deborah S.
    Samia, Hoda
    Lawrence, Justin
    Obokhare, Izi
    Marderstein, Eric
    Brady, Karen M.
    Delaney, Conor P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1396175.pdf
    Data publikacji:
    2013-04-01
    Wydawca:
    Index Copernicus International
    Tematy:
    C-reactive protein
    enhanced recovery pathway
    readmission
    colorectal surgery
    Opis:
    Hospital length of stay (LOS) and readmissions continue to be expensive and unexpected events following colorectal surgery (CRS) whether patients follow enhanced recovery pathways or traditional care. Predictors of these adverse events could facilitate identification and optimization of CRS patients. The aim of the study was to examine the impact of white blood cell count (WBC) and C-reactive protein (CRP) levels as predictors of delayed recovery or hospital readmission following CRS. Material and methods. Patients undergoing laparoscopic or open abdominal colorectal surgery by a single surgeon were managed using standardized enhanced recovery pathways. Those with postoperative day 2 CRP and white blood cell values were evaluated. Outcomes included 30-day hospital readmission rates and postoperative length of hospital stay. Results. CRP values were available for 193 patients (86 Male, mean age 58.6 years). Ninety-nine patients had surgery for colon cancer, 23 for Crohn’s disease, 19 for ulcerative colitis, 31 for diverticulitis and 18 for other reasons. Twenty patients (10.4%) were readmitted to the hospital within 30 days of surgery. POD2 CRP accurately predicted short length of hospital stay (p< 0.01). Average CRP was 6.3 in the LOS of < 3 days or less, and 11.7 in patients with LOS >4 days. The mean CRP of the readmission and non-readmission groups was 11.8 and 9.9, respectively (p=0.29). The average POD 2 WBC of the readmission and non-readmission groups was 10.6 and 9 respectively (p=0.01). Conclusion. A low POD2 CRP level was correlated with a shorter LOS, but it did not predict readmission. Conversely, POD2 WBC, and the difference in WBC from baseline were associated with readmission. These markers may be useful indicators to predict suitability of early discharge in an ERP. Further evaluation in prospective trials is warranted.
    Źródło:
    Polish Journal of Surgery; 2013, 85, 4; 198-203
    0032-373X
    2299-2847
    Pojawia się w:
    Polish Journal of Surgery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetic Field Dependent Effective Mass in the Organic Superconductor κ-(BEDT-TTF)$\text{}_{2}$I$\text{}_{3}$
    Autorzy:
    Balthes, E.
    Schweitzer, D.
    Heinen, I.
    Keller, H. J.
    Biberacher, W.
    Jansen, A. G. M.
    Steep, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/1933336.pdf
    Data publikacji:
    1995-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    74.70.Kn
    71.25.Hc
    71.25.Jd
    Opis:
    κ-(BEDT-TTF)$\text{}_{2}$I$\text{}_{3}$ is an electronically extreme two-dimensional organic metal with a superconducting transition at around 4 K. In magnetic fields above 12 T the effective mass, as obtained from the temperature dependence of the amplitudes of Shubnikov-de Haas oscillations, is magnetic field dependent as long as the magnetic field is arranged perpendicular to the conducting planes. In contrast to this, by turning the magnetic field by 27° or even only 9° the observed effective mass (as obtained from Shubnikov-de Haas and de Haas-van Alphen measurements) is field independent. We suppose that the occurrence of anyons at temperatures below 1 K in fields above 12 T is the reason for the observed field dependence of the effective mass.
    Źródło:
    Acta Physica Polonica A; 1995, 87, 4-5; 767-772
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Exposure to environmental factors and relationship to allergic rhinitis and/or asthma
    Autorzy:
    Azalim, S.P.
    Camargos, P.
    Alves, A.L.
    Senna, M.I.B.
    Sakurai, E.
    Schwabe Keller, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/50599.pdf
    Data publikacji:
    2014
    Wydawca:
    Instytut Medycyny Wsi
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2014, 21, 1
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigations of Fermi Surfaces and Effective Masses of the Organic Superconductors (BEDO-TTF)$\text{}_{2}$ReO$\text{}_{4}$(H$\text{}_{2}$O) and κ-(BEDT-TTF)$\text{}_{2}$I$\text{}_{3}$ by Shubnikov-de Haas and de Haas-van Alphen Measurements
    Autorzy:
    Schweitzer, D.
    Balthes, E.
    Karlich, S.
    Heinen, I.
    Keller, H.
    Strunz, W.
    Biberacher, W.
    Jansen, A.G.M.
    Steep, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/1933332.pdf
    Data publikacji:
    1995-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.25.Jd
    71.25.Hc
    74.70.Kn
    Opis:
    The Fermi surfaces and effective masses of (BEDO-TTF)$\text{}_{2}$ReO$\text{}_{4}$(H$\text{}_{2}$0) and κ-(BEDT-TTF)$\text{}_{2}$I$\text{}_{3}$ were investigated by Shubnikov–de Haas (SdH) and de Haas–van Alphen (dHvA) measurements in magnetic fields up to 27 T in the temperature range from 0.5 K to 4.2 K. Two small closed pockets (0.7% and 1.5% of the first Brillouin zone) are observed in (BEDO-TTF)$\text{}_{2}$ReO$\text{}_{4}$(H$\text{}_{2}$0) corresponding very well with two cross-sectional areas of the Fermi surfaces obtained for a hole and an electron pocket from tight binding calculations. In contrast, in κ-(BEDT-TTF)$\text{}_{2}$I$\text{}_{3}$ two relatively large closed sections (13% and 85% of the first Brillouin zone) of the Fermi surfaces are observed, again confirming the tight binding calculations. For κ-(BEDT-TTF)$\text{}_{2}$I$\text{}_{3}$ in magnetic fields above 12 T the effective mass for the larger orbit, as obtained from the temperature dependence of the SdH-oscillation amplitudes, is magnetic field dependent as long as the field is arranged perpendicular to the conducting planes (Θ = 0°). In contrast, from dHvA measurements - which were performed by turning the magnetic field by 27° with respect to the SdH experiments - the observed effective mass is field independent. We suppose that the occurrence of anyons at temperatures below 1 K and in fields above 12 T might be the reason for the observed field dependence of the effective mass in the SdH investigations under the special angle 0°.
    Źródło:
    Acta Physica Polonica A; 1995, 87, 4-5; 749-759
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On Decomposing the Complete Symmetric Digraph into Orientations of K4 − e
    Autorzy:
    Bunge, Ryan C.
    Darrow, Brian D.
    Dubczuk, Toni M.
    El-Zanati, Saad I.
    Hao, Hanson H.
    Keller, Gregory L.
    Newkirk, Genevieve A.
    Roberts, Dan P.
    Powiązania:
    https://bibliotekanauki.pl/articles/31343235.pdf
    Data publikacji:
    2019-11-01
    Wydawca:
    Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
    Tematy:
    digraph decompositions
    orientations of K 4 − e
    Opis:
    Let $D$ be any of the 10 digraphs obtained by orienting the edges of $ K_4 − e $. We establish necessary and sufficient conditions for the existence of a $ (K_n^*, D)$-design for 8 of these digraphs. Partial results as well as some nonexistence results are established for the remaining 2 digraphs.
    Źródło:
    Discussiones Mathematicae Graph Theory; 2019, 39, 4; 815-828
    2083-5892
    Pojawia się w:
    Discussiones Mathematicae Graph Theory
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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