48 research outputs found

    Repeatability and validity of a standardised maximal step-up test for leg function-a diagnostic accuracy study

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    <p>Abstract</p> <p>Background</p> <p>Objectively assessed physical performance is a strong predictor for morbidity and premature death and there is an increasing interest in the role of sarcopenia in many chronic diseases. There is a need for robust and valid functional tests in clinical practice. Therefore, the repeatability and validity of a newly developed maximal step up test (MST) was assessed.</p> <p>Methods</p> <p>The MST, assessing maximal step-up height (MSH) in 3-cm increments, was evaluated in 60 healthy middle-aged subjects, 30 women and 30 men. The repeatability of MSH and the correlation between MSH and isokinetic knee extension peak torque (IKEPT), self-reported physical function (SF-36, PF), patient demographics and self-reported physical activity were investigated.</p> <p>Results</p> <p>The repeatability between occasions and between testers was 6 cm. MSH (range 12-45 cm) was significantly correlated to IKEPT, (<it>r </it>= 0.68, <it>P </it>< 0.001), SF-36 PF score, (<it>r </it>= 0.29, <it>P </it>= 0.03), sex, age, weight and BMI. The results also show that MSH above 32 cm discriminates subjects in our study with no limitation in self-reported physical function.</p> <p>Conclusions</p> <p>The standardised MST is considered a reliable leg function test for clinical practice. The MSH was related to knee extension strength and self-reported physical function. The precision of the MST for identification of limitations in physical function needs further investigation.</p

    Ultralight vector dark matter search using data from the KAGRA O3GK run

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    Among the various candidates for dark matter (DM), ultralight vector DM can be probed by laser interferometric gravitational wave detectors through the measurement of oscillating length changes in the arm cavities. In this context, KAGRA has a unique feature due to differing compositions of its mirrors, enhancing the signal of vector DM in the length change in the auxiliary channels. Here we present the result of a search for U(1)B−L gauge boson DM using the KAGRA data from auxiliary length channels during the first joint observation run together with GEO600. By applying our search pipeline, which takes into account the stochastic nature of ultralight DM, upper bounds on the coupling strength between the U(1)B−L gauge boson and ordinary matter are obtained for a range of DM masses. While our constraints are less stringent than those derived from previous experiments, this study demonstrates the applicability of our method to the lower-mass vector DM search, which is made difficult in this measurement by the short observation time compared to the auto-correlation time scale of DM

    Observation of gravitational waves from the coalescence of a 2.5−4.5 M⊙ compact object and a neutron star

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    Der Cyberspace und die Ordnung der Geschlechter: Virtuelles Gender-Swapping im Internet.

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    Kontakte zwischen Menschen im Internet werden ĂŒber Bits, Chips und Datennetze vermittelt. Zwischen den beteiligten Personen steht der Computer. Computervermittelter Kommunikation fehlt dabei ein wesentliches Merkmal von face-to-face Kommunikation: Körper, Hautfarbe, Aussehen und Geschlecht der Beteiligten bleiben - auf Wunsch - unsichtbar. Sichtbar fĂŒr die TeilnehmerInnen an den Terminals jenseits der eigenen BenutzeroberflĂ€che sind nur die Worte und Zeichen, die der/die GesprĂ€chspartnerIn diesseits einspeist. Dementsprechend sehen sich UserInnen beim Eintreten in chat-rooms, MUD's, MOO's usw. immer wieder der Aufgabe gegenĂŒber, Auskunft ĂŒber ihre geschlechtliche IdentitĂ€t zu geben. Die ImmaterialitĂ€t des Cyberspace lĂ€sst es dabei zu, scheinbar frei bzw. unabhĂ€ngig von der MaterialitĂ€t der Körper ein virtuelles Geschlecht zu wĂ€hlen. Die Praxis, sich im Cyberspace fĂŒr ein anderes Geschlecht zu entscheiden als das in der RealitĂ€t gelebte, bezeichnet der Ausdruck Gender-Switching oder -Swapping . Der Beitrag beschĂ€ftigt sich mit dieser virtuellen Umgangsvariante mit IdentitĂ€ten. Anhand eines Beispiels setzt er sich mit der Bedeutung, dem Auftreten und der Konstruktion von Geschlechtlichkeit im Internet auseinander

    Cosmopolitan Hanseats and Strange Sailors: Was there a maritime culture in Bremen in the 19th century?

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