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Conventional Pressure Sensors
Published in J G Webster, Prevention of Pressure Sores, 2019
In general, intrinsic fiberoptic sensors are of questionable use for long-term studies. A jacket must be used since the glass fiber itself is extremely fragile, so the deformation characteristics of the jacket material become significant, introducing hysteresis and fatigue into the sensor response. Additionally, since the strain of the measurement is placed on the fiber itself, the optical characteristics of the fiber will become degraded after numerous repetitions. Brienza et al (1989b) recommended diffuse reflective fiberoptic sensors over microbending sensors for use in automated seating design systems.
Housekeeping and the Environment
Published in William C. Beck, Ralph H. Meyer, The Health Care Environment: The User’s Viewpoint, 2019
Each individual facility will have to deal with a few of such miscellaneous things mentioned here. If it is a large facility it is expedient to have an upholsterer to care for the recovering and possibly refinishing of furniture and a room should be planned for this. If draperies take special handling that cannot be done by the regular laundry service, it is well to plan a couple of deep wash tubs and a small washing machine and dryer or a place to hang them to dry. The draperies must be planned to meet the fire code of local, state, and federal requirements; but as a good safety practice it is well to require a nonflammable material be used. If a glass fiber is chosen it should have a soft finish that will wash without shedding and the draperies must be made so that they do not rub the top, wall, sill, or floor.
Aircrew equipment – Head injury and protection
Published in Nicholas Green, Steven Gaydos, Hutchison Ewan, Edward Nicol, Handbook of Aviation and Space Medicine, 2019
Nicholas Green, Steven Gaydos, Hutchison Ewan, Edward Nicol
Two basic energy-absorbing systems can be used in protective helmets: Glass fibre shell that breaks up on impact; each time a glass fibre ruptures or is pulled out of its resin matrix, energy is absorbed inelastically. This technique requires a strong, rigid shell.Rigid foam layer beneath the shell; crushes on impact to about 40% of its initial thickness. Provision of a finite stopping distance reduces peak acceleration imposed. In this design, a lighter shell can be employed.
Bulk Fill flow resin contraction using 3D finite element model and calibration by Fiber Bragg Grating measurement
Published in Computer Methods in Biomechanics and Biomedical Engineering, 2020
Claudio Antunes Junior, Emílio Graciliano Ferreira Mercuri, Ana Paula Gebert de Oliveira Franco, Manoella Costa, Leandro Zen Karam, Hypolito José Kalinowski, Osnara Maria Mongruel Gomes
There are some studies that have used Fiber Bragg Grating measurements in different dentistry applications. Tiwari et al. (2011) proposed an experiment to measure the strain transferred through the custom-made mouthguard to the teeth using optical fibers with recorded Bragg gratings and used the Finite Element Method to simulate the stress distribution caused by the impact on the mouthguard. Pulido et al. (2016) investigated the polymerization shrinkage of two resin based materials that are used to lute glass fiber posts, it was accomplished with two optical fibers with Bragg grating engraved into them. Fiorin et al. (2019) measured the activity of the masticatory muscle during sleep in patients with sleep bruxism using optical fiber sensors and thermal images to describe the hyperactivity of the patient using different occlusal devices. Other studies used the Bragg grating technology to evaluate the properties of dental resins composites (Rajan et al. 2016; Franco et al. 2017).
Pilot study evaluating inhalation and dermal glyphosate exposure resulting from simulated heavy residential consumer application of Roundup®
Published in Inhalation Toxicology, 2020
Jennifer S. Pierce, Benjamin Roberts, Daniel G. Kougias, Chris E. Comerford, Alexander S. Riordan, Kara A. Keeton, Heidi A. Reamer, Neva F. B. Jacobs, Jason T. Lotter
Prior to the initiation of the study, but on the same day as the study, a pilot study was conducted during which a participant wearing Tyvek coveralls used the backpack sprayer to apply water containing a blue spray pattern indicator (Liquid Harvest LazerTM, Sanco Industries Inc., Fort Wayne, IN). Based on this assessment, it was visually determined that areas in which most of the solution deposited were the right shin (i.e. the front of the right leg below the knee), the left shin (i.e. the front of the left leg below the knee), the dorsal side of the forearm of the applicator’s spraying arm, and the proximal portion of the anterior thigh (i.e. the upper front portion of the thigh) contralateral to the applicator’s spraying arm. Using this information, four 142-mm borosilicate glass fiber patches were positioned and taped in these locations on each applicator within the inhalation exposure group in order to assess dermal deposition in these higher loading zones. Patches were not used on the dermal exposure group because they would effectively reduce the surface area of the applicators’ exposed skin, thereby resulting in an underestimation of dermal uptake.
Patients’ self-report on post-retained restoration is more valuable than expected! Explorative analysis of an 11-year follow-up
Published in Acta Odontologica Scandinavica, 2019
Manja von Stein-Lausnitz, Daniel R. Reissmann, Matthias J. Roggendorf, Guido Sterzenbach, Michael Naumann
Between January 2003 and April 2004, 98 potential participants were consecutively recruited for post-endodontic treatment at the Department of Prosthodontics, Geriatric Dentistry and Craniomandibular Disorders, Charité – Universitätsmedizin Berlin, Germany. Ninety-one participants were included for randomization (Figure 1). Inclusion criteria have been previously described [25]. Participants received post-endodontic restorations with either glass-fibre or titanium posts. One single operator performed post-endodontic treatment procedures including consideration of a root canal filling of at least 4mm after post space preparation, an adhesively luted endodontic post, a 2 mm ferrule design, and a biological width of 2–3mm. Final restorations (single crowns, fixed dental prostheses, removable dental prostheses) were placed in the dental student course.