Citations with the tag: PRESSURE
Results 151 - 200
- Pressure-induced dynamic homogeneity in an athermal diblock copolymer melt.
Floudas, G.; Fytas, G. // Journal of Chemical Physics; 11/22/1999, Vol. 111 Issue 20, p9129
Reports on the effect of pressure on the dual segmental relaxation of an athermal poly(isopropene-beta-vinylethylene) copolymer melt using dielectric spectroscopy. Employment of quantity as a probe of the state of dynamci miscibility in the system; Action of pressure on inducing dynamic...
- Effect of pressure on the segmental and chain dynamics of polyisoprene. Molecular weight dependence.
Floudas, G.; Gravalides, C. // Journal of Chemical Physics; 12/1/1999, Vol. 111 Issue 21, p9847
Studies the effect of pressure on the segmental and chain dynamics of polyisoprene. Role of molecular weight; Spectral shape of the normal modes and of the segmental mode; Activation volume for the segmental mode.
- Impact Response of PBX 9501 Below 2 GPA.
Kline, K.; Horie, Y.; Dick, J. J.; Wang, W. // AIP Conference Proceedings; 2002, Vol. 620 Issue 1, p411
DDME2, 2 discrete element code, is used to model plane shock-wave profiles in unreacted PBX 9501. The constitutive properties of the material are modeled in terms of hydrostatic pressure and viscoelastic shear stress. The former is modeled using Hugoniot data. The latter is represented by a...
- Introducing the Level Pressure & Temperature Technology Report; Flow Control Wins 2014 ASBPE Awards.
Migliore, Matt // Flow Control; Aug2014, Vol. 20 Issue 8, p4
An introduction is presented which focuses on reports in the issue on topics including pressure transmitters, thermocouples, and awards won by the journal in the 2014 Azbee Awards competition.
- Pluto's Twin?
Sage, Leslie J. // Journal of the Royal Astronomical Society of Canada; 2011, Vol. 105 Issue 6, p264
The article offers the author's insight on the difference between the dwarf planet Eris and Pluto. He says that there is no need to create a new category, such as dwarf planet, because Pluto was already recognized as Kuiper Belt objects (KBOs). He mentions that Eris has no evidence for an...
- Pressure-Driven Channeling Effects in Bent Valleys.
Kossmann, M.; Sturman, A. P. // Journal of Applied Meteorology; Jan2003, Vol. 42 Issue 1, p151
Previous investigations of dynamic channeling of airflow in mountain valleys have been limited to straight valleys, where a constant along-valley component of the synoptic pressure gradient can be assumed. In nature, however, valleys are often curved or bent, that is, composed of segments of...
- Dynamic fragility in polymers: A comparison in isobaric and isochoric conditions.
Huang, Dinghai; Colucci, Dina M.; McKenna, Gregory B. // Journal of Chemical Physics; 3/1/2002, Vol. 116 Issue 9, p3925
The dynamic fragilities of six polymeric materials have been compared for isobaric (constant pressure) and isochoric (constant volume) conditions. Data were taken from the published literature for dynamic experiments performed at elevated pressures. Published...
- Stiffness of compressed fiber mats.
Astrom, J. A.; Makinen, J. P.; Hirvonen, H.; Timonen, J. // Journal of Applied Physics; 11/1/2000, Vol. 88 Issue 9, p5056
Studies the in-plane stiffness of fiber mats using an analytical and a numerical model. Effect of external pressure of bending fibers over each other; Effect of low external pressure; Approximate analytical description for the stiffness of mats formed under low external pressure.
- Carbon at pressures in the range 0.1â€“1 TPa (10 Mbar).
Nellis, W. J.; Mitchell, A. C.; McMahan, A. K. // Journal of Applied Physics; 7/15/2001, Vol. 90 Issue 2, p696
Single-shock (Hugoniot) equation-of-state data of shock-compressed C (graphite) are reported at pressures of 480 and 760 GPa (7.6 Mbar). Graphite is shock-compressed completely into a diamond-like phase at pressures below 80 GPa. At pressures of 80â€“800 GPa comparison of an ensemble of...
- Pressure effect on the resistivity in GMR La0.60Y0.07Ca0.33MnO3 compound (abstract).
Arnold, Z.; Kamenev, K.; Ibarra, M. R.; Algarabel, P. A.; Marquina, C.; Blasco, J.; García, J. // Journal of Applied Physics; 4/15/1996, Vol. 79 Issue 8, p5178
Presents an abstract of the study 'Pressure Effect on the Resistivity in GMR La[sub0.60]Y[sub0.07]Ca[sub0.33]MnO[sub3] Compound,' by Z. Arnold, K. Kamenev, M.R. Ibarra, P.A. Algarabel, C. Marquina, J. Blasco and J. Garcia.
- Critical current density and microstructure of YBa2Cu4O8.
Miyatake, Takayuki; Yamaguchi, Koji; Wada, Takahiro; Suzuki, Noburo; Willis, J. O.; Yamauchi, H.; Koshizuka, Naoki; Tanaka, Shoji // Journal of Applied Physics; 1/1/1991, Vol. 69 Issue 1, p384
Presents information on a study which investigated the intragranular critical current density J[subc] in YBa[sub2]Cu[sub4]O[sub8] prepared by two routes with different oxygen pressures at various temperatures and applied fields. Methods of preparing the samples; Temperature dependence of the...
- Blood pressure rising? Better start losing.
Miyatake, Takayuki; Yamaguchi, Koji; Wada, Takahiro; Suzuki, Noburo; Willis, J. O.; Yamauchi, H.; Koshizuka, Naoki; Tanaka, Shoji // Environmental Nutrition; May92, Vol. 15 Issue 5, p1
States that in the hopes of treating rising blood pressure before medication is required, a National Institutes of Health trial looked at non-drug treatments in more than 2,000 men and women with borderline high blood pressure. Details of the study; Losing weight gave the best results; Stress...
Miyatake, Takayuki; Yamaguchi, Koji; Wada, Takahiro; Suzuki, Noburo; Willis, J. O.; Yamauchi, H.; Koshizuka, Naoki; Tanaka, Shoji // Physical Therapy; May1998, Vol. 78 Issue 5, pS38
Summarizes an article entitled `Gait Characteristics Associated With Peak Plantar Pressures,' by V.E. Kelly, M.J. Mueller and D.R. Sinacore.
- Crankcase pressure regulators or CPR valves.
Tomczyk, John // Refrigeration Service & Contracting; Feb96, Vol. 64 Issue 2, p7
Presents information on the relationship between Crankcase Pressure Regulator (CPR) valves and Suction Pressure Regulator (SPR) values. Functions of CPR valves; Information on CPR valves; Tips given on CRP valves.
Huber, Jeffrey T.; Gillaspy, Mary L. // Encyclopedic Dictionary of AIDS-Related Terminology; 2000, p171
A definition of the term "palpation," which refers to the application of light fingertip pressure to the outer surface of the body to determine consistence and outline of organs within, is presented.
- â€œCalculation of pressure pulsations for a turbulent heterogeneous m,ediumâ€ [Doklady Physics, vol. 52, no. 7, pp. 384â€“387 (2007)].
Dmitrenko, A.V. // Doklady Physics; Dec2007, Vol. 52 Issue 12, p708
A correction to the article "Calculation of Pressure Pulsations for a Turbulent Heterogeneous Medium," by A.V. Dmitrenko is presented.
- The NaCl pressure standard.
Brown, J. Michael // Journal of Applied Physics; 11/15/1999, Vol. 86 Issue 10, p5801
Presents information on a study which proposed a revised pressure scale for sodium chloride (NACl) as an update for the work of Decker. Overview on the study of Decker; Equation used in the study of NaCl; construction of a NaCl pressure scale; Conclusion.
- Miniaturization techniques for obtaining static pressures comparable to the pressure at the center of the earth: X-ray diffraction at 416 GPa.
Ruoff, Arthur L.; Xia, Hui; Luo, Huan; Vohra, Yogesh K. // Review of Scientific Instruments; Dec90, Vol. 61 Issue 12, p3830
X-ray diffraction studies on tungsten and molybdenum were performed, using a 4-ï¿½m-diam x-ray beam, to very high pressures, with the pressures being obtained from the measured lattice parameters and isothermal equations of state of tungsten and molybdenum deduced from shock data. The bcc...
- Intelligent pressure scanners enhance chillers.
Ruoff, Arthur L.; Xia, Hui; Luo, Huan; Vohra, Yogesh K. // Control Engineering; Mar98, Vol. 45 Issue 3, p61
Features the Model 9010 intelligent pressure scanner from Pressure Systems Inc. Product use; Key features.
- Keeping the pressure on pressure instrumentation.
Johnson, Dick // Control Engineering; Mar98, Vol. 45 Issue 3, p98
Discusses the importance and key features of several pressure sensing devices. Process control and instrumentation; Pressure sensing measurement; Flow and level measurement; Yokogawa Industrial Automation's A-Series DPharp digital pressure transmitter; Foxboro Co.'s I/A Series pressure...
- TPMS Rollout Rolling Along.
Murphy, Tom // Ward's Auto World; Mar2009, Vol. 45 Issue 3, p30
The article focuses on the Tire Pressure Monitoring System (TPMS) mandatory for new vehicles sold in the U.S. It is stated that the standard is used in requiring onboard monitors to warn drivers when tire air pressure is at least 25% below the recommended cold-inflation pressure. The industry...
- Central Venous Pressure as a Guide to Volume Expansion.
Murphy, Tom // Annals of Internal Medicine; Jun67, Vol. 66 Issue 6, p1283
Editorial. Discusses the importance of central venous pressure (CVP) to blood volume expansion. Accuracy of the appraisal of right ventricular filling pressure through CVP; Reason for the reluctance of some physicians to expand blood volume despite a normal CVP; Techniques for monitoring CVP.
- How to identify shallow water flows with real-time pressure measurement.
Ward, Chris; Beique, Mitch // Offshore; Jun99, Vol. 59 Issue 6, p34
Part I. Provides information on the various applications of Pressure-While-Drilling sensor measurements, focusing on shallow water flows, a major deepwater problem. Reason deepwater drilling often proves troublesome; Methods used to mitigate the water flows; Causes of equivalent mud weight.
- QUESTION OF THE MONTH.
Ward, Chris; Beique, Mitch // Motor Age; Oct2012, Vol. 131 Issue 10, p14
A quiz about tire pressuring monitoring system is presented.
- The energies of microvoid formation in Si as a function of applied hydrostatic stress.
Cuendet, Nicolas; Halicioglu, Timur; Tiller, William A. // Applied Physics Letters; 12/23/1996, Vol. 69 Issue 26, p4071
Using a Tersoff-type empirical potential energy function, the free energy of formation for microvoids in silicon containing 24 and 57 vacancies was calculated at 1000 K as a function of externally applied hydrostatic stress in the range of -10 kbar (tensile) to 10 kbar (compressive). The results...
Cuendet, Nicolas; Halicioglu, Timur; Tiller, William A. // Taber's Cyclopedic Medical Dictionary (2009); 2009, Issue 21, p1127
A definition of the term "hypertonicity," which refers to an excess of muscular or arterial tone or intraocular pressure, is presented.
Cuendet, Nicolas; Halicioglu, Timur; Tiller, William A. // Taber's Cyclopedic Medical Dictionary (2009); 2009, Issue 21, p1230
A definition of the term "iridencleisis," which refers to an operation for relieving increased intraocular pressure, is presented.
- Heart rate and blood pressure during initial LBNP do not discriminate higher and lower orthostatic tolerant men.
Shawn R. Simonson; Peter Norsk; John E. Greenleaf // Clinical Autonomic Research; Dec2003, Vol. 13 Issue 6, p422
High (n = 7, 25 Â± 2 yr) and low (n = 8, 26 Â± 3 yr) lower body negative pressure (LBNP) tolerant men were exposed to ?15 mmHg (for 12 min) followed by ?50 mmHg (for 21 min) to test the hypothesis that heart rate (HR) and blood pressure (BP) data from acute exposure to LBNP would not...
- Transducer has digital compensation.
Shawn R. Simonson; Peter Norsk; John E. Greenleaf // Modern Power Systems; Aug95, Vol. 15 Issue 8, p95
Reports on the introduction of Pressure Systems Inc.'s series of all-media transducers.
- TOOL TIME.
Hoyer, Mark // Cycle World; Sep2014, Vol. 53 Issue 9, p76
The article features several tire pressure gauges including the Motion Pro short pencil gauge, the Blue Point analog dial gauge and the Motor Pro 0-60 psi digital tire pressure gauge.
- ASK DR. LISA.
Callahan, Lisa // Self; Oct2003, Vol. 25 Issue 10, p84
Answers a question on low blood pressure. Commonality of low blood pressure in women.
- Digital pressure gage.
Callahan, Lisa // New Equipment Digest; Aug99, Vol. 64 Issue 8, p79
Introduces the Quartzonix Model 9600 digital pressure gage from Pressure Systems Inc. Product features; Applications; Contact information.
- Generation of static pressures above 2.5 megabars in a diamond-anvil pressure cell.
Goettel, Kenneth A.; Mao, Ho-kwang; Bell, Peter M. // Review of Scientific Instruments; Jul1985, Vol. 56 Issue 7, p1420
A static pressure of 2.75 Mbars has been generated in a diamond-anvil pressure cell. This pressure is 1 Mbar higher than the highest static pressure previously produced in a laboratory, 1.72 Mbar by Mao and Bell [Science 200, 1145 (1978)]. Improvements in the geometry of the cut of beveled anvil...
- Acoustic gas density measuring cell.
Haran, E. N. // Review of Scientific Instruments; Sep88, Vol. 59 Issue 9, p2059
Preliminary experiments reported in 1983 suggested that the density of a known gas could be determined, in principle, by measuring the alternating pressure of an acoustic field set up in the gas. A density measuring cell has now been developed that is inherently fast acting (overall response...
- Pressure sensor handles the heat.
Raymond, Martha K. // Machine Design; 04/16/98, Vol. 70 Issue 7, p62
Provides information on the development of the Model 9016 Ethernet Intelligent Pressure Scanner to handle temperature changes of pressure sensors by Pressure Systems Incorporated. Features of the system; What the system consists of.
- Pressure transmitter.
Raymond, Martha K. // Plant Engineering; May2011, Vol. 65 Issue 4, p58
The article presents information about the pressure transmitter, S-10.
- Abnormal CVP waveform.
Raut, Monish S.; Maheshwari, Arun // Saudi Journal of Anaesthesia; Oct-Dec2013, Vol. 7 Issue 4, p482
A letter to the editor is presented regarding abnormal central venous pressure (CVP) waveform.
- An experimental method to dynamically test pressure sensors using a rupture disk.
Liu, Hanying; Miller, Don W.; Talnagi, Joseph W. // Review of Scientific Instruments; Feb2002, Vol. 73 Issue 2, p459
The response time of a pressure sensor is required when it is used in control systems and in some measurement applications. It is often difficult to measure the response time of a pressure sensor since it is difficult to obtain changes in fluid pressure sufficient to characterize the sensor...
- High-pressure strand burner system for propellant flame studies using absorption spectroscopy.
Mallery, C.; Kim, E.; Thynell, S.T. // Review of Scientific Instruments; Aug1995, Vol. 66 Issue 8, p4091
Describes the design and operation of a high-pressure strand burner capable of withstanding pressures up to 6.9 MPa. Associated components for use with the chamber; Performance of absorption measurements using Fourier-transform infrared spectroscopy; Obtained spectra with sufficient...
- Air pressure.
Farndon, John // Planet Earth (1-59084-469-6); 2003, p57
Although air is light, there is so much of it that air can exert huge pressure at ground level. It is the constant bombardment of billions of air molecules as they zoom about. Air pushes in all directions at ground level with a force of over two pounds per square centimeter. A fall in air...
- Dependence of the fundamental band gap of Al...Ga...N on alloy composition and pressure.
Haller, E. E.; Martin, M. C. // Journal of Applied Physics; 6/15/1999, Vol. 85 Issue 12, p8505
Presents optical absorption studies to investigate the dependence of the fundamental band gap of epitaxial films on aluminium (Al) content and applied hydrostatic pressure. Results of absorption measurements performed at atmospheric pressure; Optical transmission spectra taken from several...
Haller, E. E.; Martin, M. C. // Hutchinson Dictionary of Scientific Biography; 2005, p1
Reactor vessel constructed to allow chemical reactions to take place at high temperature and pressure. Such vessels are used, for example, in the manufacture of chemicals and materials for the construction industry.
- Managing supply pressure effect.
Adkins, Michael; Pronk, Wouter // Process & Control Engineering (PACE); Dec2013, Vol. 66 Issue 11, p12
The article the phenomena of the surface pressure effect (SPE) wherein the outlet pressure increases for no reason in a pressure-reducing regulator. Described is SPE which is also referred to as dependency wherein its possible cause could be a malfunctioning regulator. Noted is the management of...
- A COMPACT PORTABLE MERCURY MANOMETER FOR CALIBRATING PRESSURE TRANSDUCERS.
Gunther, Terry; Medina, A.; Grismer, J. T. // Angiology; Oct1965, Vol. 16 Issue 10, p635
Features a compact portable mercury manometer used for calibrating pressure transducers. Types of mercury manometer; Design of the manometer; Calibration requirements.
- Study explores mechanism of increased nocturnal IOP.
Groves, Nancy // Ophthalmology Times; 9/1/2007, Vol. 32 Issue 17, p16
The article presents a study on the increased nocturnal changes in intraocular pressure (IOP). Research indicates that IOP follows a carcadian rhythm that includes a nocturnal increase which occurs despite a nighttime decrease in aqueous humor flow. Researchers found that tonographically...
- Systemic, circadian factors challenge IOP control measures.
Rajecki, Ron; Asrani, Sanjay // Ophthalmology Times; 7/1/2008, Vol. 33 Issue 13, p10
The article discusses factors related with controlling intraocular eye pressure (IOP). It is stated that the challenging task of controlling patients IOP becomes more difficult due to several factors which can cause fluctuations in IOP. These factors include posture, blood pressure,...
- A Computer Controlled Precision High Pressure Measuring System.
Sadana, S.; Yadav, S.; Jha, N.; Gupta, V. K.; Agarwal, R.; Bandyopadhyay, A. K.; Saxena, T. K. // Measurement Science Review; 2011, Vol. 11 Issue 6, p198
No abstract available.
- Calculation of barometric efficiency in shallow piezometers using water levels, atmospheric and earth tide data.
R. Acworth; T. Brain // Hydrogeology Journal; Dec2008, Vol. 16 Issue 8, p1469
Abstractï¿½ï¿½The variation in atmospheric pressure at Baldry in New South Wales, Australia (32ï¿½52' S, 148ï¿½32' E), has been determined using a 4-year record of hourly measurements. Fourier analysis of this data shows clear diurnal and semi-diurnal variation in atmospheric...
- A new sensitivity analysis scheme for coupled vibro-acoustic system using wave based method.
Xuesong He; Qibai Huang; Caixia You // Archive of Applied Mechanics; Feb2009, Vol. 79 Issue 2, p125
Abstractï¿½ï¿½Vibro-acoustic sensitivity is used to predict the change of structure displacement and acoustic pressure when the design variable has been changed, which is significant for reducing the vibration and noise of systems. The sensitivity of structure displacement and acoustic...
- Pressure effect on the structural and elastic properties of ternary compounds M2AlC (M = Ti, V, Nb, and Ta); ab initio study.
Y. Medkour; A. Roumili; D. Maouche // European Physical Journal - Applied Physics; Nov2008, Vol. 44 Issue 2, p125
Using ab initio calculations, we have performed a study of the hydrostatic pressure effect on the equilibrium volume, lattice parameters, elastic modulus, and elastic anisotropy of selected M2AlC phases with M = Ti, V, Nb, and Ta. The deviations of our calculated volume change are lower than 3%...