86,643 research outputs found
Measuring the Degree of Corporate Social Media Use.
No full textThis article aims to provide a model with which to measure the degree of corporate social media use or, in other words, the extent to which companies are exploiting the potentialities of single or multiple social media platforms. This is, however, explicitly different from using metrics to assess the success of social media activities, as it is purely measuring how intensively a pre-defined group of social media is utilized, taking into account the frequency of social media activity by the brand as well as the related user reactions. The degree of corporate social media use helps companies and market researchers analyze single brands or companies and compare them with other brands, competitors, or industry averages. The degree of corporate social media use is a useful indicator which should be combined with social media metrics in order to draw better conclusions about where to increase or intensify social media activities
Non-structural carbohydrate and hydraulic dynamics during drought and recovery in Fraxinus ornus and Ostrya carpinifolia saplings
No full textThe maintenance of hydraulic function during and after a drought event is crucial for tree survival, but the
importance of non-structural carbohydrates (NSCs) in the recovery phase is still debated. We tested whether
higher NSC availability facilitates post-drought hydraulic recovery, by applying a short-term drought (Sdr) and a
long-term drought combined with shading (Ldr+sh) in Fraxinus ornus and Ostrya carpinifolia. Plants were then reirrigated
and recovery was checked 24 h later, by measuring water potential, stem percentage loss of hydraulic
conductance (PLC) and NSC content. The relative magnitude of hydraulic and carbon constraints was also assessed
in desiccated plants. During drought, PLC increased only in F. ornus, while it was maintained almost
constant in O. carpinifolia due to tighter stomatal control of xylem pressure (i.e. more isohydric). In F. ornus, only
Sdr plants maintained high NSC contents at the end of drought and, when re-irrigated, recovered PLC to control
values. Whereas hydraulic failure was ubiquitous, only F. ornus depleted NSC reserves at mortality. Our results
suggest that preserving higher NSC content at the end of a drought can be important for the hydraulic resilience
of trees
Variations on the Author
No full text“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Drought response strategies and post-drought recovery in two European trees
No full textKlimawandel ist die Hauptursache für veränderte globale Temperaturmittel und Niederschlagsmuster. Gemeinsam mit Klimaextremen wie Dürre und Hitzewellen verursachen sie trockenheitsinduziertes Baum- und Waldsterben. Die Forschung der Stresseinwirkung auf den Wasser- und Kohlenstoffhaushalt der Pflanzen wird zunehmend wichtiger, v.a. in dürreresistenten Arten. Aus diesem Grund unterzogen wir zwei junge verholzte Angiospermen, Fraxinus ornus (F. o.) und Ostrya carpinifolia (O. c.), fünf verschiedenen Behandlungen: einmonatiger Trockenstress unter geringen Lichtverhältnissen sollte zu ‘carbon starvation’ und ‘hydraulic failure’ führen. Wiederbewässerung sollte zeigen, ob die embolierten Gefäße trotz fehlenden NSC wieder befüllt werden können. Kurzzeitstress unter guten Lichtbedingungen sollte genauso zu ‘hydraulic failure’ wie unter Langzeitstress führen. Letztere Pflanzen wurden wiederbewässert um festzustellen, ob ihre Xylem-Neubefüllung erfolgreicher ist. Die fünfte Gruppe wurde nicht bewässert um mögliche zum Tod führende Mechanismen festzustellen. In dieser Studie testeten wir die Hypothese ob die Embolien-Reparatur in der Erholungsphase nur in denjenigen Pflanzen möglich sei, welche am Ende des Trockenstresses hohe NSC-Mengen aufwiesen. Die Daten zeigten unterschiedliche artspezifische Strategien mit Trockenheit umzugehen. In O. c. wurde kein Schaden der hydraulischen Leitfähigkeit erfasst, während in F. o. ein hohes Maß an Xylem-Embolien stattfand. In F. o. war die Kapazität der Embolien-Reparatur unter Langzeitstress und wenig Licht nicht so hoch wie unter Kurzzeitstress unter viel Licht. Es gibt Hinweise darauf, dass dies auf einen höheren Stärkegehalt in kurzzeitgestressten Pflanzen zurückzuführen ist. Andererseits konnten die geringen Lichtbedingungen in O. c. zu keiner Abnahme der gespeicherten NSC im Stamm führen.Climate change causes increased global mean temperatures and modifications of world’s precipitation patterns. In combination with extreme climate events, like drought and heat waves, these changes can lead to drought-induced tree mortality and forest decline. Research into the role of stress impact on plants’ water- and carbon balance becomes important, especially in species which are considered to be drought resistant. For this reason, we subjected two young woody angiosperms, Fraxinus ornus (F. o.) and Ostrya carpinifolia (O. c.), to five different experimental treatments. Drought stress for at least one month under low light regimes was imposed to induce non-lethal carbon starvation and hydraulic failure. Re-irrigation was used to demonstrate eventual refilling of embolized xylem conduits despite a lack of NSC. Short-term stress under normal light conditions was applied to induce hydraulic failure but without carbon starvation. Also in this case, re-irrigation was used to establish whether xylem-refilling was more successful in these plants. Finally, irrigation was completely suspended to observe possible mechanisms leading to death. We specifically tested the hypothesis that embolism repair in post-drought recovery would be possible only in plants with high NSC-contents at the end of the drought-stress impact. Data highlighted species-specific strategies for coping with drought. In O. c. no hydraulic damage was recorded, while in F. o. drought stress induced high levels of xylem embolism. In F. o., after prolonged drought under low light, the capacity for embolism repair was lower than after short-term stress under normal light regimes. We suggest that these different responses can be attributed to the recorded higher amount of starch in plants subjected to short-term stress compared to those that experienced long-term stress and low light conditions. On the other hand, in O. c. drought stress and low light conditions did not reduce NSC stores in stem.author: Aichner Natalie, BScZusammenfassungen in Deutsch und EnglischMasterarbeit Karl-Franzens-Universität Graz 2017 772
Drought response strategies and post-drought recovery in two European trees
No full textKlimawandel ist die Hauptursache für veränderte globale Temperaturmittel und Niederschlagsmuster. Gemeinsam mit Klimaextremen wie Dürre und Hitzewellen verursachen sie trockenheitsinduziertes Baum- und Waldsterben. Die Forschung der Stresseinwirkung auf den Wasser- und Kohlenstoffhaushalt der Pflanzen wird zunehmend wichtiger, v.a. in dürreresistenten Arten. Aus diesem Grund unterzogen wir zwei junge verholzte Angiospermen, Fraxinus ornus (F. o.) und Ostrya carpinifolia (O. c.), fünf verschiedenen Behandlungen: einmonatiger Trockenstress unter geringen Lichtverhältnissen sollte zu ‘carbon starvation’ und ‘hydraulic failure’ führen. Wiederbewässerung sollte zeigen, ob die embolierten Gefäße trotz fehlenden NSC wieder befüllt werden können. Kurzzeitstress unter guten Lichtbedingungen sollte genauso zu ‘hydraulic failure’ wie unter Langzeitstress führen. Letztere Pflanzen wurden wiederbewässert um festzustellen, ob ihre Xylem-Neubefüllung erfolgreicher ist. Die fünfte Gruppe wurde nicht bewässert um mögliche zum Tod führende Mechanismen festzustellen. In dieser Studie testeten wir die Hypothese ob die Embolien-Reparatur in der Erholungsphase nur in denjenigen Pflanzen möglich sei, welche am Ende des Trockenstresses hohe NSC-Mengen aufwiesen. Die Daten zeigten unterschiedliche artspezifische Strategien mit Trockenheit umzugehen. In O. c. wurde kein Schaden der hydraulischen Leitfähigkeit erfasst, während in F. o. ein hohes Maß an Xylem-Embolien stattfand. In F. o. war die Kapazität der Embolien-Reparatur unter Langzeitstress und wenig Licht nicht so hoch wie unter Kurzzeitstress unter viel Licht. Es gibt Hinweise darauf, dass dies auf einen höheren Stärkegehalt in kurzzeitgestressten Pflanzen zurückzuführen ist. Andererseits konnten die geringen Lichtbedingungen in O. c. zu keiner Abnahme der gespeicherten NSC im Stamm führen.Climate change causes increased global mean temperatures and modifications of world’s precipitation patterns. In combination with extreme climate events, like drought and heat waves, these changes can lead to drought-induced tree mortality and forest decline. Research into the role of stress impact on plants’ water- and carbon balance becomes important, especially in species which are considered to be drought resistant. For this reason, we subjected two young woody angiosperms, Fraxinus ornus (F. o.) and Ostrya carpinifolia (O. c.), to five different experimental treatments. Drought stress for at least one month under low light regimes was imposed to induce non-lethal carbon starvation and hydraulic failure. Re-irrigation was used to demonstrate eventual refilling of embolized xylem conduits despite a lack of NSC. Short-term stress under normal light conditions was applied to induce hydraulic failure but without carbon starvation. Also in this case, re-irrigation was used to establish whether xylem-refilling was more successful in these plants. Finally, irrigation was completely suspended to observe possible mechanisms leading to death. We specifically tested the hypothesis that embolism repair in post-drought recovery would be possible only in plants with high NSC-contents at the end of the drought-stress impact. Data highlighted species-specific strategies for coping with drought. In O. c. no hydraulic damage was recorded, while in F. o. drought stress induced high levels of xylem embolism. In F. o., after prolonged drought under low light, the capacity for embolism repair was lower than after short-term stress under normal light regimes. We suggest that these different responses can be attributed to the recorded higher amount of starch in plants subjected to short-term stress compared to those that experienced long-term stress and low light conditions. On the other hand, in O. c. drought stress and low light conditions did not reduce NSC stores in stem.author: Aichner Natalie, BScZusammenfassungen in Deutsch und EnglischMasterarbeit Karl-Franzens-Universität Graz 2017 772
[Newspaper Clipping: Author Claims Evidence of Second JFK Assassin #1]
No full textNewspaper article titled "Author Claims Evidence of Second JFK Assassin." The article states that author Richard J. Whalen concluded "that there is circumstantial evidence to support the theory of a second assassin in the shooting of President John F. Kennedy.
Also By The Same Author: AKTiveAuthor, a Citation Graph Approach to Name Disambiguation
No full textThe desire for definitive data and the semantic web drive for inference over heterogeneous data sources requires co-reference resolution to be performed on those data. In particular, name disambiguation is required to allow accurate publication lists, citation counts and impact measures to be determined. This paper describes a graph-based approach to author disambiguation on large-scale citation networks. Using self-citation, co-authorship and document source analyses, AKTiveAuthor clusters papers, achieving precision of 0.997 and recall of 0.818 over a test group of eight surname clusters
John F. Kennedy telegram to Roosevelt
No full textJersey Homesteads (later the Borough of Roosevelt) was established in the 1930s as an agro-industrial cooperative community. It was established specifically for urban Jewish garment workers, many of whom had emigrated from Europe. President John F. Kennedy sent a telegram to the citizens of Roosevelt, New Jersey, apologizing for not being able to attend the memorial dedication in honor of former President Franklin Delano Roosevelt. (Jersey Homesteads became Roosevelt in 1945 in honor of the president.) President Kennedy expressed his gratitude to the people of Roosevelt for constructing the memorial, and commented that it will serve as a constant reminder of Roosevelt's good works
Logarithmic variance profiles and the corresponding f-1 spectra of temperature fluctuations in turbulent Rayleigh-Bénard convection
No full textWe report experimental results for the temperature variance 2(z) and the corresponding frequency spectra P(f) in turbulent Rayleigh-Bénard convection (RBC) in a cylindrical sample of aspect ratioT= D/L = 1:00 (D = 1:12 m is the diameter and L = 1:12 m the height). The measurements were conducted in the Rayleigh-number range 1011 < Ra < 1:35 1014 and Pr ' 0:8. For Ra = 1:35x1014, 2(z) could be described well by a logarithmic dependence on the vertical position z in a range of z 1 < z < z 2 with z 1 ' 70 and z 2 = 0:1L. Here L=(2Nu) is the thickness of a thin thermal sublayer adjacent to the horizontal plate where the heat flux (denoted by the Nusselt number Nu) is carried mostly by thermal diffusion. In the log layer, we found that the temperature spectra had a significant frequency range over which P(f) f with close to 1. As Ra decreased, increased so that the log layer became thinner. At Ra = 2:05 1011, z 2 < z 1 and therefore there was no range for a log layer. Correspondingly, the temperature spectrum near the horizontal plate did not have the f1 scaling form either
Maine author Franklin F. Gould recalls his first glimpse of the outside world
No full textMaine author Franklin F. Gould recalls his first glimpse of the outside world as he relates how, as a young farm boy in the late 1800\u27s, he drove his father\u27s horses on an errand to an icebound river
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