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  • 1
    In: tm - Technisches Messen, Walter de Gruyter GmbH, Vol. 86, No. s1 ( 2019-09-01), p. 77-81
    Abstract: Dieses Paper zeigt einen möglichen Aufbau zur in situ Messung der Positionierabweichung von seriell angeordneten Rotationseinheiten mit einem konstanten, gemeinsamen Momentanpol. Mit Hilfe dieses Aufbaus kann die Position des letzten Gliedes der kinematischen Kette in allen drei Raumachsen gemessen werden. Dazu wird der Abstand zu einer hemisphärischen Referenzfläche mit drei mitbewegten kartesisch angeordneten Fabry-Pérot-Interferometern gemessen. Diese Interferometer werden hinlänglich ihrer Eignung zur Messung auf einer gekrümmten Referenzfläche untersucht. Sie zeigen eine periodische Nichtlinearität von ±10nm und eine Positionswiederholbarkeit mit einer Standardabweichung von unter 1.6nm.
    Type of Medium: Online Resource
    ISSN: 2196-7113 , 0171-8096
    RVK:
    RVK:
    Language: English
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2019
    detail.hit.zdb_id: 2025790-9
    SSG: 15,3
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  • 2
    In: Pharmaceutics, MDPI AG, Vol. 14, No. 11 ( 2022-10-29), p. 2335-
    Abstract: To date, there is no approved local therapeutic agent for the treatment of epistaxis due to hereditary hemorrhagic telangiectasia (HHT). Several case reports suggest the topical use of timolol. This monocentric, prospective, randomized, placebo-controlled, double-blinded, cross-over study investigated whether the effectiveness of the standard treatment with a pulsed diode laser can be increased by also using timolol nasal spray. The primary outcome was severity of epistaxis after three months, while the main secondary outcome was severity of epistaxis and subjective satisfaction after one month. Twenty patients were allocated and treated, of which 18 patients completed both 3-month treatment sequences. Timolol was well tolerated by all patients. Epistaxis Severity Score after three months, the primary outcome measure, showed a beneficial, but statistically nonsignificant (p = 0.084), effect of additional timolol application. Epistaxis Severity Score (p = 0.010) and patients’ satisfaction with their nosebleeds after one month (p = 0.050) showed statistically significant benefits. This placebo-controlled, randomized trial provides some evidence that timolol nasal spray positively impacts epistaxis severity and subjective satisfaction in HHT patients when additively applied to standard laser therapy after one month. However, the effect of timolol was observed to diminish over time. Trials with larger sample sizes are warranted to confirm these findings.
    Type of Medium: Online Resource
    ISSN: 1999-4923
    Language: English
    Publisher: MDPI AG
    Publication Date: 2022
    detail.hit.zdb_id: 2527217-2
    SSG: 15,3
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  • 3
    Online Resource
    Online Resource
    Walter de Gruyter GmbH ; 2018
    In:  tm - Technisches Messen Vol. 85, No. 4 ( 2018-4-25), p. 244-251
    In: tm - Technisches Messen, Walter de Gruyter GmbH, Vol. 85, No. 4 ( 2018-4-25), p. 244-251
    Abstract: Tiltmeters with nanorad resolution in a large measurement range of ±9 mrad (±0.5 ○ ) and a very good linearity have been developed at the Technische Universität Ilmenau in the recent years. The working principle bases on the measurement of tilt-dependent lateral forces, which act on a hanging force-compensated weigh cell (precision balance). The disadvantage is the relatively complex design of the weigh cell mechanics, the large dead weight and the high manufacturing costs. For that reason a simplified tiltmeter was developed. It only consists of two components: a monolithic pendulum mechanics and an optical position sensor. State of the art pendulum tiltmeters contain several components that are linked by screwed, clamped or glued connections. This can limit the long-term-, temperature- or humidity stability of the tiltmeter. The position sensor achieves a standard deviation of ∼ 50 pm at a measuring frequency of 10 Hz. The length of the pendulum amounts to 0.1 m, its mass is ∼ 62 g. With this combination, the theoretical standard deviation of the tilt measurement should result to ∼ 0.6 nrad at 10 Hz measuring frequency and was approved by measurements. The measurement range of the new monolithic tiltmeter amounts ∼ ±2 mrad.
    Type of Medium: Online Resource
    ISSN: 2196-7113 , 0171-8096
    RVK:
    RVK:
    Language: English
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2018
    detail.hit.zdb_id: 2025790-9
    SSG: 15,3
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
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