high pressure weakening

Role of polar vortex weakening in cold events in central Asia …

The Siberian high pressure is above 1030 hPa at 90°E and 50°N. In November and December, the SLP weakens slightly from the Arctic to southern Siberia, and the decrease is statistically significant, especially in December. ... The increase in the Siberian high is consistent with the weakening of the zonal-mean zonal winds over high …Web

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Thermal Pressurization Weakening in Laboratory Experiments

Literature reports a large range of phenomena occurring during faulting, after the end of the first slip weakening phase, and mainly observed under high pressure and velocity and within a very ...Web

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Particle weakening in high-pressure roll grinding

Evidence has emerged on the abil- pressurized rolls. Such high interparticle stresses result ity of high-pressure roll grinding in weakening a variety in a much greater proportion of fines in comparison to of materials, including …Web

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Evaluation of the effect of adsorbed gas and free gas on …

Compared with the temperature, the gas pressure is the primary control of the weakening effect, and the effect of gas pressure on the strength roughly equals to that of confining stress. The ratio of weakening value of strength due to free gas to that of adsorbed gas of normal coal is 1.3–3.4, and that of deformed coal is 8.4–19.8.Web

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Chemistry in earthquake: the active chemical role of liquid and

Equation shows the known general weakening of the dielectric constant with increasing temperatures and the direct correlation of the two factors with the dielectric constant. ... The high pressure reached by the continuous production of CO 2 should push it towards the surface aquifers. During earthquakes, then, the mechanical shaking …Web

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Pressure weakening unusual-caged dynamics of La

The results obtained show that elevated pressure weakens the unusual caged dynamics in La 80 Al 20. This is caused mainly by the different affinity for surrounding atoms, high five-fold symmetry, high vibrational frequency, and the weakening difference in atomic vibrational amplitudes at elevated pressure.Web

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Indian Monsoon Mechanism: Jet Stream Theory

This condition occurs due to weakening of jet stream due to lesser temperature contrast between sub-tropics and temperate region (Our concern is STJ only). ... The ridge region of Southern branch of STJ creates strong divergence (high pressure) in north-west India. The diverging air blocks incoming winds and prevents strong …Web

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CP

Possible thermohaline circulation weakening or shutdown due to freshwater release in the North Atlantic (similar to the 8.2 ka event; Alley et al., 1997), ... However, the high-pressure systems in Europe effectively blocked …Web

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Hydrogen permeability of thermoplastic composites and

The leakage rate Q depends on the pressure difference between the high and low pressure side Δ p, the surface area of the permeation specimen A and the permeation resistance ρ tot [51]: (3) Q = Δ p · A ρ tot. The permeation resistance can be expressed as the thickness t divided by the solubility S and the diffusivity D [51]: (4) ρ tot ...Web

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What Is High Blood Pressure? Numbers and Meaning

High blood pressure makes your heart work harder, weakening it over time. It also puts too much pressure on the tissues at the receiving end of the blood. For example, high-pressure blood flow into the kidneys damages the delicate renal (kidney) cells over time, leading to kidney disease or failure.Web

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Floor heave failure mechanism of large-section tunnels in …

Second, owing to the high pressure of groundwater; the water in the joints causes damage to the rock mass surrounding the excavation [20]. ... The deformation pressure arising from the weakening of the surrounding rock at the bottom of the inverted arch causes the structure to squeeze inward on both sides and the bottom to bulge. …Web

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Pressure weakening unusual-caged dynamics of La

The results obtained show that elevated pressure weakens the unusual caged dynamics in La 80 Al 20. This is caused mainly by the different affinity for surrounding atoms, high five-fold symmetry, high vibrational frequency, and the weakening difference in atomic vibrational amplitudes at elevated pressure. 2.Web

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Weak Heart Symptoms and Treatments

A weak heart muscle (cardiomyopathy) can be caused by conditions like diabetes, coronary heart disease, and high blood pressure. When the heart is weak, it's often unable to either fill up properly ( heart …Web

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The effect of contact area on velocity weakening of the friction

High pressure contact areas were produced by wear-debris agglomeration and compaction. 3. Results and discussion3.1. Relationship between friction coefficient and contact area. ... As the normal pressure increased, the velocity-weakening was pronounced, which indicated that the formation of the secondary contact plateau was …Web

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What Is High Blood Pressure? Numbers and Meaning

HBP in Physiology HBP Readings Health Risk Management Reducing HBP Blood pressure is a measurement of the force of your blood against the walls of your …Web

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High Pressure Metamorphism Caused by Fluid Induced Weakening …

The pressure difference between the mineral assemblage described as recrystallized pseudotachylite (1.5–1.6 GPa 20) and the peak eclogite facies metamorphism (2.1–2.2 GPa 20) may thus be due to the excess pressure generated by weakening of shear zone rocks following hydration without the need of further burial to >70 km depth.Web

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Hypertensive crisis: What are the symptoms?

9 rowsExtra fluid retention may cause your weight increase. If you have …Web

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Revealing the Pressure-Induced Softening/Weakening …

Unprecedented pressure-induced shuffle-set plane softening/weakening is observed in all of the materials under consideration; specifically, the reduction in antibonding states below the Fermi level at high pressures causes shuffle-set plane softening in diamond and c-BN, whereas for Si and Ge, the pressure-induced shuffle-set plane …Web

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High pressure keeps the week's weather quiet in Houston area.

High pressure is the dominating weather feature of this week's forecast and it'll keep sunshine going and temperatures climbing. By late week, a developing system …Web

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Fault Weakening During Short Seismic Slip Pulse Experiments: …

One of the key observations of the present study is that all simulated fault gouge materials tested wet (either high or low pressure) showed rapid slip weakening during short-displacement seismic slip (∼0.15 m) representative of an earthquake of small magnitude, while the same materials saturated with N 2, do not weaken much, even …Web

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Fracture-Induced Pore Fluid Pressure Weakening and Dehydration …

High pore fl uid pressure is also proposed to control the location and style of fault slip at the conditions of deep slow slip and tremor (e.g., Dobson et al., 2002; Kodaira et al., 2004; Thomas ...Web

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Overlying Strata Movement and Mine-Pressure Weakening Law of High

This work focused on the serious coal compression under buildings, railways, and water bodies in central and eastern China; the wide range of rock formation damage during the collapse mining process; the high pressure of mines; and difficulties in controlling surface subsidence after mining. The E1302 working face of Shanxi Gaohe Energy was taken as …Web

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An examination of strain weakening and self-annealing in a Bi-Sn …

The high pressure torsion (HPT) process was performed on a Bi-Sn eutectic alloy up to 10 revolutions and the materials were stored at room temperature for durations up to 91 days in order to investigate the strain weakening and self-annealing behaviour of the alloy. ... For example, the strain weakening of Zn-Al alloys is widely attributed to ...Web

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Weakening of the South Asian summer monsoon linked to

A two-step weakening of the SASM wind since ~12 Ma is proposed based on the εNd record. ... The MH-IL pressure gradient is calculated as the mean sea-level pressure over the Mascarene High and ...Web

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Atmospheric Pressure Belts and Wind Systems

Along 30° N and 30° S are found the high-pressure areas known as the subtropical highs. Further pole wards along 60° N and 60° S, the low-pressure belts are termed as the sub polar lows. Near the poles the pressure is high and it is known as the polar high. These pressure belts are not permanent in nature. They oscillate with the …Web

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Fracture-induced pore fluid pressure weakening and dehydration …

Abstract. We investigate the strength, deformation processes, and pore fluid weakening during localized shear of antigorite serpentine. Recent work has shown that some phyllosilicates, including antigorite, undergo a reverse transition from ductile to localized deformation at the pressure-temperature conditions of deep slow slip and …Web

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High Pressure Metamorphism Caused by Fluid Induced Weakening …

PMID: 30451887. PMCID: PMC6242872. DOI: 10.1038/s41598-018-35200-1. Studies of mineral equilibria in metamorphic rocks have given valuable insights into the tectonic processes operating at convergent plate margins during an orogeny. Geodynamic models simulating orogenesis and crustal thickening have been constrained by …Web

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High Blood Pressure (Hypertension) > Fact Sheets > Yale Medicine

Like when too much air is pumped into a tire, this condition causes pressure to build up against blood vessel walls. Over time, high blood pressure damages arterial walls and increases the risk of serious health problems such as heart attack, stroke, and peripheral artery disease . At Yale Medicine, "we are very individualized in our approach ...Web

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High-pressure Definition & Meaning

high-pressure: [adjective] having or involving a high or comparatively high pressure especially greatly exceeding that of the atmosphere. having a high barometric pressure.Web

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What are the Symptoms of High Blood Pressure?

If your blood pressure is unusually high AND you have headache or nosebleed and are feeling unwell, wait five minutes and retest. If your reading remains at 180/120 mm Hg or higher, call 911. If you are …Web

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Friction properties of hornblende and implications for

Velocity-weakening behaviors were observed at 303, 505 and 607 °C in the high confining pressure series, and at 303 and 403 °C in the low confining pressure series. The |a-b| parameter associated with velocity weakening of hornblende in our high and low confining pressure experiments are 0.0005–0.0014 and 0.0014–0.0015, respectively.Web

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ATMS100EXAM2(lecture13) Flashcards | Quizlet

Convergence aloft causes surface pressures to rise. Air diverges from high pressure systems at the surface. Surface winds flow clockwise and outward in NH. Air sinks, warms, and dries, inhibiting cloud formation. Usually opposite between surface and aloft. Upper-air divergence generally above surface convergence and vice versa.Web

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Avalanche » High Pressure / High Pressure Ridge

On a weather map that shows upper level atmospheric pressure, high pressure usually takes the shape of a ridge, or an upside-down U. High pressure ridges often deflect the flow of more active weather, and can cause prolonged periods of dry weather. Although mid-winter high pressure systems often lead to periods of improved snow stability, they ...Web

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Overlying Strata Movement and Mine-Pressure Weakening Law of High

This work focused on the serious coal compression under buildings, railways, and water bodies in central and eastern China; the wide range of rock formation damage during the collapse mining process; the high pressure of mines; and difficulties in controlling surface subsidence after mining. The E1302 working face of Shanxi Gaohe …Web

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High Pressure Metamorphism Caused by Fluid Induced …

High Pressure Metamorphism Caused by Fluid Induced Weakening of Deep Continental Crust Introduction. The last two decades of research have shown …Web

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The significance of strain weakening and self-annealing in a

A cast Bi–Sn eutectic alloy was processed by high-pressure torsion (HPT) at room temperature and stored at room temperature for durations of up to 91 days in order to investigate the effect of self-annealing. ... This strain weakening in HPT is similar to the trends reported earlier for the Zn–Al eutectoid alloy and the Pb–Sn eutectic ...Web

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The Development of High and Low Pressure Systems

Figure 7.11 A,D,E. Development of High and Low Pressure Centers. : curvature and jetstreak effects associated with force imbalances. : heating and cooling effects. UPPER-LEVEL DIVERGENCE: associated with changes in the curved flow & jesters (favored on the east side of a trough, north of the jetstream axis) and heating through latent heat ...Web

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Hypertensive Heart Disease: Causes, Diagnosis, Treatment

A weak (or absent) pulse, located below the area of your artery that is blocked or narrowed. Cool, pale or bluish skin in the lower extremities. Decreased blood pressure in the arm or other area that is affected by a loss of blood flow. Audible sounds, called "bruits," over the affected artery.Web

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13.6: Tendency of Sea-level Pressure

13.6.1. Mass Budget; 13.6.2. Latent Heating; 13.6.3. Net Pressure Tendency; Because cyclones are associated with low surface pressure, processes that lower the sea-level pressure (i.e., deepen the low) favor cyclogenesis. On isobaric surfaces such as 100 kPa, a deepening cyclone corresponds to falling geopotential heights.. Conversely, processes …Web

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