Wide dispersion speaker system and cover mounting structure for instrument directly mounted to flat portion

2008 ◽  
Vol 124 (1) ◽  
pp. 22
Author(s):  
Ken Iwayama ◽  
Takashi Nishino
Keyword(s):  
Flat Portion

PRESSURE, VOLUME, TEMPERATURE RELATIONS OF ETHYLENE IN THE CRITICAL REGION. I.

1939 ◽  
Vol 17b (7) ◽  
pp. 206-213 ◽  
Author(s):  
J. Dacey ◽  
R. McIntosh ◽  
O. Maass
Keyword(s):  
Experimental Error ◽  
Heterogeneous System ◽  
Constant Pressure ◽  
Volume Ratio ◽  
Time Lags ◽  
Compressed Liquid ◽  
Region I ◽  
Flat Portion ◽  
Liquid States ◽  
Mass Volume

Pressure isothermals of the system were determined both above and below the temperature of disappearance of the meniscus. Regions of constant pressure with changing volume were observed with all isothermals, in agreement with the prediction of Mayer and Harrison (2, 3). The complete envelope of this region above the critical temperature has not as yet been determined. The pressure of the heterogeneous system at 9.50 °C. was found to correspond within experimental error to the pressure of the flat portion of the homogeneous isothermal at the same temperature. The pressure of this heterogeneous system was found to be independent of the mass-volume ratio; this is in agreement with the experimental behaviour previously discovered by the authors (5) for such a system at 9.80 °C. Moreover, the pressure of the heterogeneous system was found to be identical with that of the system which had been heated at constant volume to a temperature at which the density difference in the tube is known to have been destroyed, and then cooled to the same temperature of 9.50 °C.The isothermal at 9.60 °C. was studied, and shown to be the equilibrium curve at that temperature. A hysteresis was observed on reversing the direction of measurement, i.e., from "vapour" to compressed "liquid". This hysteresis was found to be caused by the time lags which are observed in passing from the "vapour" region of an isothermal to regions of high density. Certain apparent discrepancies between the work of the present authors and that of Geddes and Maass have been observed and cannot as yet be explained.The phenomena observed are interpreted on the basis of a difference between the gaseous and liquid states of aggregation, with a structure assigned to the latter.

Stroke Volume Recruitability during the Third Trimester of Pregnancy

2017 ◽  
Vol 35 (08) ◽  
pp. 737-740 ◽  
Author(s):  
Sandra Herrera ◽  
Maggie Kuhlmann-Capek ◽  
Sarah Rogan ◽  
Antonio Saad ◽  
George Saade ◽  
...  
Keyword(s):  
Stroke Volume ◽  
Pregnant Women ◽  
Vena Cava ◽  
Normal Pregnancy ◽  
Gravid Uterus ◽  
Third Trimester ◽  
Fluid Bolus ◽  
The Third ◽  
Hemodynamic Variables ◽  
Flat Portion

Objective It is unknown whether the heart operates in the ascending or flat portion of the Starling curve during normal pregnancy. Pregnant women do not respond to the passive leg-raising maneuver secondary to mechanical obstruction of the inferior vena cava by the gravid uterus. Our objective was to evaluate if administration of a fluid bolus increases baseline stroke volume (SV) among healthy pregnant patients during the third trimester. Study Design Healthy pregnant women who underwent elective term cesarean sections were included. A noninvasive cardiac output monitor was used to measure hemodynamic variables at baseline and after administration of a 500-mL crystalloid bolus. Results Forty-five women were included in the study. Fluid administration was associated with a statistically significant increase in SV from a baseline value of 71 ± 11 to 90 ± 19 mL (95% confidence interval [CI]: 13.67–21.49; p < 0.01) and a significant decrease in maternal heart rate from a baseline of 87 ± 9 beats per minute to 83 ± 8 after the fluid bolus (95% CI: −6.81 to −2.78; p = 0.03). No changes in peripheral vascular resistances or any other measured hemodynamic parameters were noted with volume expansion. Conclusion In healthy term pregnancy, the heart operates in the ascending portion of the Starling's curve, rendering it fluid responsive.

scholarly journals Strengthening of a curved composite beam by introducing a flat portion

2019 ◽  
Vol 222 ◽  
pp. 110863 ◽  
Author(s):  
Sylvain Arki ◽  
Jean-François Ferrero ◽  
Steven Marguet ◽  
Jean-Max Redonnet ◽  
Alexandre Aury
Keyword(s):  
Composite Beam ◽  
Flat Portion

The Mw7.1 September 19th Puebla-Morelos (Mexico) earthquake triggered by brucite and antigorite dewatering

2021 ◽  
Author(s):  
Fabián Gutiérrez-Aguilar ◽  
David Hernández-Uribe ◽  
Robert M. Holder ◽  
Cailey B. Condit
Keyword(s):  
Fluid Pressure ◽  
Convergent Margins ◽  
Cocos Plate ◽  
Outer Rise ◽  
Geological Processes ◽  
Bending Stresses ◽  
Positive Volume ◽  
Flat Portion ◽  
Mexico Earthquake ◽  
Ocean Ridge

&lt;p&gt;Subduction controls key geological processes at convergent margins including seismicity and resultant seismic hazard. The September 19th 2017 Mw7.1 Mexican earthquake nucleated ~250 km from the trench within the Cocos plate near its Moho, ~57 km below Earth&amp;#8217;s surface. The prevailing hypothesis suggests that this earthquake resulted from bending stresses occurring at the flat-to-steep subduction transition. Here, we present an alternative, but not mutually exclusive, hypothesis: the dehydration reaction brucite + antigorite = olivine + H2O in the slab mantle controls intermediate-depth seismicity along the flat portion of the subducted Cocos plate. This reaction releases a substantial amount of H2O, resulting in a large positive volume change, and thus in an increase in pore fluid pressure at the appropriate depth&amp;#8211;temperature conditions to cause the Puebla-Morelos and other intraslab earthquakes in Mexico. The amount of H2O released by this reaction depends on the degree of serpentinization of the oceanic mantle prior to subduction. Only oceanic mantle with &gt; 60% serpentinization&amp;#8212;as expected along abundant deep extensional faults at the mid-ocean-ridge or where the plate bends at the outer rise&amp;#8212;will stabilize brucite, and thus, will experience this reaction at the same depths where the September 19th 2017 earthquake nucleated.&lt;/p&gt;

scholarly journals Compound Heat Transfer Enhancement of Wavy Fin-and-Tube Heat Exchangers through Boundary Layer Restarting and Swirled Flow

Energies ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 1959 ◽  
Author(s):  
Ali Sadeghianjahromi ◽  
Saeid Kheradmand ◽  
Hossain Nemati ◽  
Jane-Sunn Liaw ◽  
Chi-Chuan Wang
Keyword(s):  
Heat Transfer ◽  
Thermal Resistance ◽  
Heat Exchangers ◽  
Vortex Generator ◽  
Vortex Generators ◽  
Longitudinal Vortex ◽  
Transfer Enhancement ◽  
Flat Portion ◽  
Improve Heat Transfer ◽  
Swirled Flow

This study performs a 3D turbulent flow numerical simulation to improve heat transfer characteristics of wavy finandtube heat exchangers. A compound design encompassing louver, flat, and vortex generator onto wavy fins can significantly enhance the heat transfer performance of wavy fin-and-tube heat exchangers. Replacement of wavy fins around tubes with flat fins is not effective as far as the reduction of thermal resistance is concerned, although an appreciable pressure drop reduction can be achieved. Adding two louvers with a width of 8 mm to the flat portion can reduce thermal resistance up to 6% in comparison with the reference wavy fin. Increasing the louver number and width can further decrease the thermal resistance. Also, it is found that the optimum louver angle is equal to the wavy angle for offering the lowest thermal resistance. Therefore, compound geometry with three louvers, a width of 12 mm, and the louver angle being equal to wavy angle with waffle height to be the same as fin pitch of the reference wavy fin has the most reduction in thermal resistance of 16% for a pumping power of 0.001 W. Adding punching longitudinal vortex generators on this compound geometry can further decrease thermal resistance up to 18%.

WETTING PHENOMENA AND CONSTANT MEAN CURVATURE SURFACES WITH BOUNDARY

2005 ◽  
Vol 17 (07) ◽  
pp. 769-792 ◽  
Author(s):  
RAFAEL LÓPEZ
Keyword(s):  
Mean Curvature ◽  
Constant Mean Curvature ◽  
Dirichlet Condition ◽  
Microgravity Environment ◽  
Special Focus ◽  
General Shape ◽  
Mean Curvature Equation ◽  
Wetting Phenomena ◽  
Cmc Surfaces ◽  
Flat Portion

In a microscopic scale or microgravity environment, interfaces in wetting phenomena are usually modeled by surfaces with constant mean curvature (CMC surfaces). Usually, the condition regarding the constancy of the contact angle along the line of separation between different phases is assumed. Although the classical capillary boundary condition is the angle made at the contact line, configurations also occur in which a Dirichlet condition is appropriate. In this article, we discuss those with vanishing boundary conditions, such as those that occur on a thin flat portion of a plate of general shape covered with water. In this paper, we review recent works on the existence of CMC surfaces with non-empty boundary, with a special focus on the Dirichlet problem for the constant mean curvature equation.

scholarly journals An Irish Bronze Casting formerly preserved at Killua Castle, co. Westmeath

1921 ◽  
Vol 1 (2) ◽  
pp. 122-124
Author(s):  
E. C. R. Armstrong
Keyword(s):  
Previous History ◽  
Royal Irish Academy ◽  
Flat Portion ◽  
Bronze Casting

The bronze casting (fig. 1) was recently purchased by the Royal Irish Academy. It was one of the antiquities preserved at Killua Castle, co. Westmeath, but its previous history is unknown. The length of the casting is 4·4 in.: the raised box-shaped portion is 2·4 in. in breadth, while the flat portion measures at its widest part 1·5 in. Possibly it was the limb of a cruciform mounting for a book-cover. Its ornamentation is admirable.

Permissible Parameter Ranges of Access Hole Geometries for WUF-W Connections

2017 ◽  
Vol 33 (2) ◽  
pp. 687-707 ◽  
Author(s):  
Sang Whan Han ◽  
Nam Hun Kim
Keyword(s):  
Seismic Behavior ◽  
Three Dimensional ◽  
Nonlinear Finite Element ◽  
Cyclic Behavior ◽  
Finite Element Analyses ◽  
Moment Frames ◽  
Access Hole ◽  
Special Moment Frames ◽  
Flat Portion ◽  
Parameter Ranges

The welded unreinforced flange-welded web (WUF-W) connection is one of seven prequalified connections for special moment frames (SMF) specified in AISC 358-10 (2010). Previous studies reported that the cyclic behavior of WUF-W connections was strongly affected by weld access hole geometry, and some WUF-W connections did not satisfy the requirements for SMF connections. For investigating in detail the effect of access hole configurations on the cyclic behavior of WUF-W connections, this study conducts three-dimensional nonlinear finite element analyses. This study shows that the seismic behavior of WUF-W connections are strongly affected by two configuration parameters, access hole slope and length of flat portion. To satisfy the requirement for SMF connections, this study proposes a range of the access hole slope and length of flat portion for WUF-W connections considering different span-to-depth ratios, beam depths, and material types.

J'accuse!-M. LeComte de LaPlace a Prohibé le Recrutement des Alvéoles du Poumon

PEDIATRICS ◽  
1996 ◽  
Vol 98 (6) ◽  
pp. 1196-1197
Author(s):  
NICHOLAS M. NELSON
Keyword(s):  
Transpulmonary Pressure ◽  
Unit Load ◽  
Charge Voltage ◽  
Oxygen Dissociation ◽  
Flat Portion ◽  
Strain Stress ◽  
It Compliance ◽  
Loaded Structure ◽  
Binding Curve ◽  
Sigmoid Shape

A recurrent concept throughout all the natural sciences is that of capacitance—"the extension or displacement of a loaded structure per unit load." The electrical engineer knows capacitance as the ratio of charge/voltage. Physicists (since Hooke, who first enunciated the concept) recognize strain/stress as compressibility (the inverse of the modulus). Pulmonary physiologists look at volume/pressure and call it compliance, while biochemists view the volume of molecules that can be liganded to a carrier and call it a binding curve. Clinicians recognize this form as the oxygen-dissociation curve, instantly identified by its sigmoid shape. This shape also describes the inflation curve of the gasless lung—in the following sequence of increasing transpulmonary pressure: (1) a flat portion with only a small increase in volume—this segment describes the discontinuous openings of the smaller airways and alveoli, once their interfacial tensions have been overcome;

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