Inexpensive piezoelectric diaphragms can be used as sensors to facilitate both nozzle 1 height setting and bed levelling in FFF (Fused Filament Fabrication) 3D printers. A variety of probes 2 have been developed by the authors and others to utilize piezoelectric diaphragms both under the 3 build stage and in the printer head. The reliability, repeatability and sensitivity of these probes has 4 ...

In this paper we develop vacuum-actuated polyimide bi-stable actuators using buckled diaphragms for applications in the field of MEMS. The fabrication process involves a single mask step and DRIE etch step to fabricate the buckled bi-stable diaphragms. Compressive stresses in a companion thermal oxide layer provide pre-stress in the polyimide mechanical films that initiates diaphragm buckling u...

By field investigation, it is found that the lower section of transmission tower body is the critical position for insuring tower’s integral stability under strong wind. For improving tower’s wind-resistant performance, the scheme of adding diaphragms at mid-height of diagonal members in lower tower body was proposed and its static effectiveness was researched by static loading tests. Taking th...

The use of flexible roof diaphragms is very common in the United States, both for residential buildings and large-scale commercial buildings. Due to its simplicity, the traditional diaphragm design method is commonly used in diaphragm design, in particular for the design of diaphragms with relatively small dimensions. The traditional diaphragm design method assumes the axial chord forces develo...

Michael G. Oliva, Ph.D. Professor Department of Civil and Environmental Engineering University of Wisconsin–Madison Madison, Wisconsin The in-plane fl exibility of untopped precast concrete double-tee diaphragms is often ignored in current design practice. The performance of parking structures during earthquakes and subsequent research studies have shown, however, that in-plane fl exibility of ...

GOLDBERG, ALFRED L., AND RICHARD ODESSEY. Oxidation of amino acids by diaphragms from fed and fasted rats. Am. J. Physiol. 223(6) : 1384-1391. 1972.-The oxidation of L-amino-14C acids was studied in isolated diaphragms from fed and fasted rats. During a 90-min incubation, diaphragms from fed rats produced 14C02 from leucinel14C, isoleucine1 -14C, valine1 -14C, alanineP4C, glutamate-U-14C, and a...

Objective To evaluate the technical feasibility of four-dimensional (4D) CT for the functional evaluation of the pediatric diaphragm. Materials and Methods In 22 consecutive children (median age 3.5 months, age range 3 days-3 years), 4D CT was performed to assess diaphragm motion. Diaphragm abnormalities were qualitatively evaluated and diaphragm motion was quantitatively measured on 4D CT. L...

Single crystal silicon (SCS) diaphragms are widely used as pressure sensitive elements in micromachined pressure sensors. However, for harsh environments applications, pure silicon diaphragms are hardly used because of the deterioration of SCS in both electrical and mechanical properties. To survive at the elevated temperature, the silicon structures must work in combination with other advanced...