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Journal articles on the topic 'Pressure box'

Author: Grafiati

Published: 30 May 2022

Last updated: 31 July 2025

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1

Oshati, Olajide Samuel, Arun J. Valsangkar, and Allison B. Schriver. "Earth pressures exerted on an induced trench cast-in-place double-cell rectangular box culvert." Canadian Geotechnical Journal 49, no. 11 (2012): 1267–84. http://dx.doi.org/10.1139/t2012-093.

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Earth pressure data from the field instrumentation of a cast-in-place reinforced rectangular box culvert are presented in this paper. The instrumented culvert is a 2.60 m by 3.60 m double-cell reinforced cast-in-place rectangular box buried under 25.10 m of fill constructed using the induced trench installation (ITI) method. The average earth pressure measured across the roof was 0.42 times the overburden pressure, and an average of 0.52 times the overburden pressure was measured at mid-height of the culvert on the sidewalls. Base contact pressure under the rectangular box culvert was also mea

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2

McGuigan, Benjamin L., and Arun J. Valsangkar. "Centrifuge testing and numerical analysis of box culverts installed in induced trenches." Canadian Geotechnical Journal 47, no. 2 (2010): 147–63. http://dx.doi.org/10.1139/t09-085.

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Induced trench construction is routinely used for circular conduits, but its application for box culverts is less common. To understand the complex soil–structure interaction issues related to the design of induced trench box culverts, centrifuge tests were performed to measure earth pressures on a model box culvert installed in several induced trench configurations. These tests were modelled with FLAC and good agreement was achieved. A parametric study performed with FLAC identified a preferred compressible zone geometry having a width of 1.2 times the culvert width and a thickness of 0.5 tim

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3

Davis, M. J. "Microvascular control of capillary pressure during increases in local arterial and venous pressure." American Journal of Physiology-Heart and Circulatory Physiology 254, no. 4 (1988): H772—H784. http://dx.doi.org/10.1152/ajpheart.1988.254.4.h772.

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The extent to which capillary hydrostatic pressure might be protected from increases in local arterial and venous pressure was examined in the wing microcirculation of unanesthetized pallid bats (Antrozous pallidus). Arterial inflow and venous outflow pressures to the wing were elevated using a box technique to increase pressure around the body of the animal in steps of 12 mmHg between 0 and +60 mmHg for 3-min periods. During this time, hydrostatic pressure, diameter, and red cell velocity in single microvessels were continuously recorded. All branching orders of arterioles constricted signifi

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4

Alam, Miah, Omar Chaallal, and Bertrand Galy. "Soil-Structure Interaction of Flexible Temporary Trench Box: Parametric Studies Using 3D FE Modelling." Modelling and Simulation in Engineering 2021 (September 20, 2021): 1–17. http://dx.doi.org/10.1155/2021/9949976.

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This paper presents the results of two parametric finite-element studies that were carried out using the PLAXIS-3D finite element (FE) computer code. The following objectives and corresponding parameters were considered: (i) to evaluate the soil pressure on the steel trench box shield; the parameters studied were related to soil type and material, and the study considered till, dry sand, wet sand, and sensitive clay soil; (ii) to assess the effect of trench box material and geometry on earth pressure; the parameters studied were related to trench box material (steel versus aluminum) as well as

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5

Ni, Weixiang, Yanan Hu, and Zhonghua Li. "A Theoretical Derivation and Comparison Method for the Optimal Location for Energy Dissipation Boxes." Water 16, no. 15 (2024): 2189. http://dx.doi.org/10.3390/w16152189.

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In long-distance, high-elevation gravitational water supply systems, it is essential to incorporate energy dissipation to lower pipeline pressures. The energy dissipation box is a novel device for pressure reduction, extensively utilized in gravitational flow transition systems. Despite its appealing contribution, systematic selection methods still need to be used regarding its optimum location. Hence, this paper considers the sum-of-the-maximum hydrostatic pressure head (SMHPH) and derives an extreme location equation for the energy dissipation box (EDB) in the design stage, and then, it comp

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6

Zhang, Yunlong, Xin Feng, Hao Zhou, et al. "Pressure characteristics of rectangular box jacking considering box-soil-lubricant interaction." Tunnelling and Underground Space Technology 126 (August 2022): 104569. http://dx.doi.org/10.1016/j.tust.2022.104569.

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7

Lee, Kicheol, Joonyoung Kim, and Sang Inn Woo. "Analysis of Horizontal Earth Pressure Acting on Box Culverts through Centrifuge Model Test." Applied Sciences 12, no. 4 (2022): 1993. http://dx.doi.org/10.3390/app12041993.

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Underground space is being utilized due to the saturation of surface ground. The box culvert, as a representative infrastructure that has moved underground, is installed to protect such fixtures as electricity and gas. Because buried box culverts are necessarily affected by soil, it is important to study the earth pressure according to soil type. Herein, the horizontal earth pressure of the buried box culvert was analyzed. Accordingly, a precisely simulated centrifuge model test was performed. Additionally, the coefficient of earth pressure was analyzed. The results had significant variability

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Ni, Weixiang, Jian Zhang, and Sheng Chen. "Optimal Location of Energy Dissipation Box in Long Distance and High Drop Gravitational Water Supply System." Water 13, no. 4 (2021): 461. http://dx.doi.org/10.3390/w13040461.

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In the long-distance and high-drop gravitational water supply systems, the water level difference between the upstream and downstream is large. Thus, it is necessary to ensure energy dissipation and pressure head reduction to reduce the pipeline pressure head. The energy dissipation box is a new type of energy dissipation and pressure head reduction device, which is widely used in the gravitational flow transition systems. At present, there is still a dearth of systematic knowledge about the performance of energy dissipation boxes. In this paper, a relationship between the location of the ener

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9

Zhang, Wei Jing. "Study on the Control Strategy and Algorithm for Head-Box." Applied Mechanics and Materials 738-739 (March 2015): 1086–89. http://dx.doi.org/10.4028/www.scientific.net/amm.738-739.1086.

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This paper introduces the work process and mechanism of the head-box, from the experimental point of view, analyzed the relationship between the head-box control parameters. The relationship between the level and the total pressure and the relationship between the fan pressure and total pressure is give. Through various experimental results, the control algorithm and strategy of the head-box is proposed. The practice shows that the total pressure control precision is about 3%.

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10

Smith, Thomas R., and M. Bonner Denton. "A High-Pressure Inductively Coupled Plasma Torch." Applied Spectroscopy 41, no. 4 (1987): 654–57. http://dx.doi.org/10.1366/0003702874448607.

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An inductively coupled plasma (ICP) torch utilizing an extended coolant tube that tapers down to a small exit orifice designed to increase the pressure within the ICP torch is described. This torch design makes use of the advantages associated with higher torch operating pressures (including improved detection limits, increased sensitivity, and better plasma stability), without requiring major modifications to existing commercially available ICP torch box and matching networks. Detection limits obtained with the use of the new torch design are compared with those obtained from several commonly

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11

Abuhajar, Osama, Tim Newson, and Hesham El Naggar. "Scaled physical and numerical modelling of static soil pressures on box culverts." Canadian Geotechnical Journal 52, no. 11 (2015): 1637–48. http://dx.doi.org/10.1139/cgj-2014-0493.

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The response of buried box culverts is a complex soil–structure interaction problem, where the relative stiffness between the soil and structure is a critical factor. In addition, soil arching is an important aspect of the soil–culvert interaction problem. A series of static scaled physical model centrifuge tests were performed to investigate soil–culvert interaction. Two different box culvert thicknesses and Nevada sand specimens with different relative densities were used to explore the interaction between the sand and box culverts under different conditions. The static loading consisted of

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12

Xia, Jun Wu, Guo Tao Dou, Di Wang, and Zhen Hua Lu. "Numerical Modeling of Lateral Earth Pressure Acting on Box Culvert under the Ground Deformation." Applied Mechanics and Materials 577 (July 2014): 1166–69. http://dx.doi.org/10.4028/www.scientific.net/amm.577.1166.

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Box culvert affected by mining subsidence is exposed to damage potential in relation to the lateral earth pressure. This study intends to specify and compare different ground deformation by the mining subsidence effect in box culvert. For this purpose, a finite-element software (ANSYS) is used to generate models incorporating the soil and a box culvert. The results shows that the lateral earth pressure of box culvert was related to the way of ground deformation, In addition, the kind of soil also affected the distribution and value of the lateral earth pressure.

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13

Joyner, M. J. "Does the pressor response to ischemic exercise improve blood flow to contracting muscles in humans?" Journal of Applied Physiology 71, no. 4 (1991): 1496–501. http://dx.doi.org/10.1152/jappl.1991.71.4.1496.

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The purpose of this study was to determine in humans 1) the gain for the reflex pressor response that occurs when perfusion pressure to rhythmically contracting muscles is reduced and 2) whether the pressor response improves blood flow to the contracting muscles. Six normal subjects performed light, moderate, and heavy rhythmic forearm contractions (30/min) with the forearm enclosed in a Plexiglas box. Pressure in the box was increased 10 mmHg each minute up to 50 mmHg to reduce transmural pressure in the arterial system of the forearm. Mean arterial pressure (MAP) was measured continuously. D

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14

Abid, Fahim, and Kaveh Niayesh. "Characterization of Ultrahigh Pressure Nitrogen Arc Using Black Box Arc Model." PLASMA PHYSICS AND TECHNOLOGY 10, no. 3 (2023): 127–31. http://dx.doi.org/10.14311/ppt.2023.3.127.

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In this paper, the effect of filling pressure on the black box arc parameters of nitrogen arc is reported using Mayr arc model. The arc current is approximately 130 A at 190 Hz. The filling pressure is varied at absolute pressure of 1, 20, and 40 bar. A phase transition from gas to supercritical state occurs when the pressure of nitrogen exceeds 33.5 bar at room temperature. To determine the effect of forced cooling, first, the free-burning arc is studied at different filling pressures. Afterwards, a self-blast arrangement is used where gas is blown into the arc near current zero. It has been

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15

Hamza, Leila H., Quang Dang, Xiao Lu, Ayesha Mian, Sabee Molloi, and Ghassan S. Kassab. "Effect of passive myocardium on the compliance of porcine coronary arteries." American Journal of Physiology-Heart and Circulatory Physiology 285, no. 2 (2003): H653—H660. http://dx.doi.org/10.1152/ajpheart.00090.2003.

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The objective of this study was to determine the effect of passive myocardium on the coronary arteries under distension and compression. To simulate distension and compression, we placed a diastolic-arrested heart in a Lucite box, where both the intravascular pressure and external (box) pressure were varied independently and expressed as a pressure difference (ΔP = intravascular pressure – box pressure). The ΔP-cross-sectional area relationship of the first several generations of porcine coronary arteries and the ΔP-volume relationship of the coronary arterial tree (vessels >0.5 mm in diame

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16

Liu, Guo Dan, Xin Xin Wang, Xuan Wang, Feng Qi, Gang Wang, and Song Tao Hu. "Large Size Static Pressure Box Airflow Distribution." Advanced Materials Research 756-759 (September 2013): 4433–38. http://dx.doi.org/10.4028/www.scientific.net/amr.756-759.4433.

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This paper mainly studies at the different way of ventilation to the influence of air distribution in the large size plenum. The model is a grand theatre stalls. To model the plenum which under the grand theatre stalls,and took out the size of large mutations alone modeling and studying it. the six different way of ventilation: small plenum with four directions supply air; Take a duct with four tuyere on supply air; Single tuyere withside air supply; Tuyere parallel supply air; Single tuyere with air supply under; Take a duct with four draught under supply air have influence of air distributio

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17

Hall, Trevor J., Paul Jones, Richard G. Silcock, and Piet G. Filet. "Grazing pressure impacts on two Aristida/Bothriochloa native pasture communities of central Queensland." Rangeland Journal 39, no. 3 (2017): 227. http://dx.doi.org/10.1071/rj16126.

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Managing native pastures for sustainable and economic production requires a good understanding of grazing effects on pasture dynamics. The Aristida/Bothriochloa pastures of north-eastern Australia are important for cattle production but little data on grazing pressure impacts on pastures are available to guide management decisions of producers, for land management education programs, or for predictive modelling. To address this deficiency, four different continuous grazing intensities were imposed on woodland communities over 7 or 8 years at two sites: a Eucalyptus populnea (poplar box) and a

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18

Davis, M. J., and P. J. Sikes. "A rate-sensitive component to the myogenic response is absent from bat wing arterioles." American Journal of Physiology-Heart and Circulatory Physiology 256, no. 1 (1989): H32—H40. http://dx.doi.org/10.1152/ajpheart.1989.256.1.h32.

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The responses of three sequential branching orders of arterioles in the bat wing to rapid and slow changes in transmural pressure were studied. Arterial and venous pressures to the wing were elevated simultaneously by pressurizing a box containing the body of the animal, while the wing was exposed to atmospheric pressure. Box pressure was elevated from 0 to +48 mmHg at two rates: 24 and 0.6 mmHg/s. During this time, continuous recordings of hydrostatic pressure and diameter were made in single arterioles using intravital microscopic techniques. Second-order arterioles and arcuate arterioles fr

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19

Davis, M. J. "Control of bat wing capillary pressure and blood flow during reduced perfusion pressure." American Journal of Physiology-Heart and Circulatory Physiology 255, no. 5 (1988): H1114—H1129. http://dx.doi.org/10.1152/ajpheart.1988.255.5.h1114.

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Regulation of blood flow depends on changes in the sum of arterial (Ra) and venous (Rv) resistances, whereas regulation of capillary pressure (Pc) depends on the ratio of Rv to Ra. If the myogenic response of the arterial system (i.e., delta Ra) is the primary mechanism for controlling pressure and flow when perfusion pressure is lowered, then Pc and total flow should be regulated to the same degree under these conditions. This hypothesis was tested by making direct measurements of Pc and flow in skin and skeletal muscle in the wings of unanesthetized bats. The box method was used to reduce pe

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20

Li, Xiao Hui, Yi Liang Zhang, and Xue Dong Xu. "Failure Analysis of the Stuffing Box in a Super High Pressure Compressor." Advanced Materials Research 415-417 (December 2011): 2226–30. http://dx.doi.org/10.4028/www.scientific.net/amr.415-417.2226.

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In this paper, theoretical and experimental researches were done to find the repeated cracking reason of stuffing box in a super hyper pressure compressor. The mathematical expression of the assembly pressure was deduced in interference fit. From macro and micro perspectives, residual stresses were measured by X-ray diffraction in typical position of stuffing box when the packing box in combination and separation states. Besides, metallography and fracture examinations were carried out. The results showed that the real magnitude of shrink range of the failed stuffing box was only account for 1

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21

Xiaodong, Wang, and Liu Ciqun. "Horizontal well pressure analysis in box-bounded reservoirs." Applied Mathematics and Mechanics 19, no. 4 (1998): 315–20. http://dx.doi.org/10.1007/bf02457535.

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22

Zhao, Xinyu, Lu Xiong, Guirong Zhuo, et al. "A Review of One-Box Electro-Hydraulic Braking System: Architecture, Control, and Application." Sustainability 16, no. 3 (2024): 1049. http://dx.doi.org/10.3390/su16031049.

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With the development of automobile electrification and intelligence, new requirements have been put forward for automotive braking technologies. Under this background, the One-box EHB (Electro-Hydraulic Braking system) brake-by-wire technology has emerged, which combines the electric booster and wheel-cylinder control module into one box and can realize vehicle stability and comfort functions such as service brake, pedal feel simulation, brake decoupling, failure backup, active braking, and wheel-cylinder pressure control. This article reviews the current research of key technologies of One-bo

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23

Tang, Jia Dong, Yi Ping Lu, Jia De Han, and Zuo Min Wang. "Research of Flow Field for Irradiation Box of Cable Ultraviolet Cross-Linking." Applied Mechanics and Materials 274 (January 2013): 208–11. http://dx.doi.org/10.4028/www.scientific.net/amm.274.208.

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In order to analyze the cooling air velocity and pressure distribution characteristics in a ventilation scheme presented for the irradiation box of cable ultraviolet cross-linking, the three-dimensional solid model of the irradiation box was established, its flow field was simulated by software FLUENT according to computational fluid dynamics principle under some calculation conditions. The results show that the air velocity around the cable is higher, enhancing convective heat transfer effect, the irradiation box large space is under negative pressure condition.

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24

Shan, Renliang, Weijun Liu, Zhe Liu, and Zhien Wang. "Structure Design and Flow Field Analysis of a Model Test Box Used to Study Freezing Temperature Field of Seepage Stratum." Advances in Materials Science and Engineering 2021 (June 17, 2021): 1–11. http://dx.doi.org/10.1155/2021/5587148.

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To meet the research needs of the freezing temperature field under seepage, we investigate and design a seepage-freezing model test box, which can meet the requirements of strength, deformation, dispersed flow, simulated laminar flow, and water sealing performance. Using theoretical analysis and calculation, the pressure design index of the model box was obtained. Based on safety considerations, the model test box was designed with a pressure vessel bearing of 0.05 MPa. The structure of “sink + porous plate” was used inside the box. By flow field analysis, the porous plate can effectively redu

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25

Paik, Jeom Kee. "Limit State Design Technology for a Membrane Type Liquid Natural Gas Cargo Containment System Under Sloshing Impacts." Marine Technology and SNAME News 43, no. 03 (2006): 126–34. http://dx.doi.org/10.5957/mt1.2006.43.3.126.

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The aim of the present paper is to develop limit state design technology for cargo containment system structures of membrane type liquid natural gas (LNG) carriers, with the focus on sloshing impacts. The mechanical properties of plywood material making up the NO96 type LNG cargo containment insulation box structures are obtained from tensile coupon testing undertaken in the present study. The ultimate strength characteristics of the LNG cargo insulation box structure under quasi-static pressure action are investigated using ANSYS computer code. The dynamic failure behavior of the insulation b

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26

Shrier, I., and S. Magder. "Pressure-flow relationships in in vitro model of compartment syndrome." Journal of Applied Physiology 79, no. 1 (1995): 214–21. http://dx.doi.org/10.1152/jappl.1995.79.1.214.

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Compartment syndrome is a condition in which an increase in intramuscular pressure decreases blood flow to skeletal muscle. According to the Starling resistor (i.e., vascular waterfall) model of blood flow, the decrease in flow could occur through an increase in arterial resistance (Rart) or an increase in the critical closing pressure (Pcrit). To determine which explains the decrease in flow, we pump perfused a canine gastrocnemius muscle placed within an airtight box, controlled box pressures (Pbox) so that flow ranged from 100 to 50%, and measured Pcrit, Rart, arterial compliance, small ven

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27

Li, Jiaguang, Yi Wei, Tenglong Liang, Yuanfang Yan, Ying Gao, and Xiaoyan Lu. "Design and Validation of a Stratified Shear Model Box for Seismic Response of a Sand-Blowing Reclamation Site." Buildings 14, no. 5 (2024): 1405. http://dx.doi.org/10.3390/buildings14051405.

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The global increase in building collapses and damage on soft-soil sites due to distant significant earthquakes poses similar challenges for sand-blowing reclamation (SBR) sites on soft-soil layers. This study was initiated to capture the vibration characteristics of the SBR sites and to provide fresh insights into their seismic responses. Initially, considering the heterogeneity and layered structure of soil at SBR sites, we developed a novel stratified shearing model box. This model box enables the simulation of the complex characteristics of soil layers at SBR sites under laboratory conditio

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Lee, Jen-shih, Timothy Fallon, Margaret Hunter, Qiang Ye, and Lian-pin Lee. "Respiratory Effect on the Blood Volume of Pulmonary Capillaries." Journal of Biomechanical Engineering 110, no. 2 (1988): 150–54. http://dx.doi.org/10.1115/1.3108420.

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We measured the density variations of aortic blood from rabbits ventilated by a positive end inspiratory pressure of 6 mmHg or a negative box pressure of the same magnitude. When calculated from the density variations, the fluctuations in blood volume of the pulmonary capillaries within one cycle as induced by an intermittent positive pressure ventilation were found to be similar to the ones induced by an intermittent negative pressure ventilation. Using these volumetric fluctuations as a means to assess the transpulmonary pressure and the transmural pressure across the pulmonary capillaries,

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Koopmann, G. H., W. Neise, and K. A. Cunefare. "Fan Casing Noise Radiation." Journal of Vibration and Acoustics 113, no. 1 (1991): 37–42. http://dx.doi.org/10.1115/1.2930152.

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This paper presents a method for assessing the extent of casing noise radiation of a centrifugal fan relative to the aeroacoustic sources associated with the inlet box of the fan. Central to the method is a boundary element program which is used to compute the acoustic pressures on the surfaces of the fan casing in terms of its surface vibration which in this case was measured experimentally. Data from an earlier experiment was used as the starting point for this study. Available data included sound pressure measurements near and away from the inlet box of the fan and vibration measurements ov

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30

Li, Jing, and Yi Jiang. "Numerical Calculation on the Influence of Missile Exhaust Plume with Mechanical Properties to the Double-Launch Box." Advanced Materials Research 978 (June 2014): 101–5. http://dx.doi.org/10.4028/www.scientific.net/amr.978.101.

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The adverse impact of the exhaust plume on the inner wall of the vertical launch box and the former friable lid of the adjacent launch box is a common phenomenon, which causes the deformation or damage of the launch container. By using the three-dimensional unsteady numerical simulation, discrete phase model and multicomponent model, the change of the pressure and temperature with time on many monitoring sites are analyzed. The results show that the pressure and the temperature on the edge of the inner wall significantly rise over time after 0.2s. The pressure on the centerline of the inner wa

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31

Sun, Yuxuan, Shuai Xing, Zhongxi Tian, Boliang Zhang, and Wanrong Liu. "Experimental Investigation on a Water Diversion Shield Segment Using a Newly Developed Model Test Chamber." Applied Sciences 14, no. 15 (2024): 6647. http://dx.doi.org/10.3390/app14156647.

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Jinan City in China is known for its abundant spring water, and the protection of underground spring water transport channels is a key issue that needs to be paid attention to in Jinan subway construction. In areas where underground spring water transport channels are easily disturbed, when the shield tunnel passes through a composite formation with a permeable layer in the middle and an impermeable layer in the upper and lower parts, the underground spring water transportation channel is blocked, the spring veins are damaged, and the underground spring water is blocked in the upstream, result

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32

Yao, Guo Wen, Liang Zhou, Zhi Xiang Zhou, and Shi Ya Li. "Study on Pressure-Bending Stress Transfer in the Joint of the Steel-Concrete Composite Arch Bridge." Advanced Materials Research 250-253 (May 2011): 2053–56. http://dx.doi.org/10.4028/www.scientific.net/amr.250-253.2053.

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Effective combination and carry-loading together between steel and concrete play important roles for the steel-concrete composite structure. The steel-concrete composite joint decides the constructing safety and life-cycle performance as the key member for the steel-concrete composite arch bridge. The stress distribution in the steel-concrete composite joint was studied by model test under pressure-bending load. And the stress transfer was probed in the steel box, composite joint and reinforced concrete box. The result shows that the steel and reinforced concrete boxes are under elastic compre

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33

Cristelo, Nuno, Carlos Félix, and Joaquim Figueiras. "Experimental behaviour of concrete box culverts — comparison with current codes of practice." Canadian Geotechnical Journal 56, no. 7 (2019): 970–82. http://dx.doi.org/10.1139/cgj-2018-0506.

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It is now accepted that current expeditious models for determining earth pressures on flexible underground structures under compacted layers do not include several technical nuances of the soil–structure interaction. Thus, these models are not capable of delivering an optimized design. The present paper compares the results from the well-known American Association of State Highway and Transportation Officials (AASHTO) model with two different numerical models — a user-friendly elastic model and a more robust finite element model — and with results retrieved from a full-scale monitoring of a co

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34

Shevchenko, Serhii S. "Physical Model and Calculation of Face Packing Seals." Journal of Mechanical Engineering 23, no. 4 (2020): 45–51. http://dx.doi.org/10.15407/pmach2020.04.045.

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Increasing the reliability and service life of dynamic-pump shaft seals is the most important requirement for their creation. The most common type of seals is still traditional stuffing box seals, which are controlled leakage assemblies that are periodically restored during operation. A radical change in the design of standard stuffing box seals is the transition to face packing seals with a constant pressure against the packing. It is shown that face packing seals can successfully combine the advantages of mechanical face seals and the simplicity and relatively low cost of traditional stuffin

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35

Wang, Zhiyuan. "Thinking outside the Box: Globalization, Labor Rights, and the Making of Preferential Trade Agreements." International Studies Quarterly 64, no. 2 (2020): 343–55. http://dx.doi.org/10.1093/isq/sqaa001.

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Abstract States can seemingly defy the dictates of globalization. In practice, although being pressured by their competitors, states rarely engage in the race to the bottom by downgrading labor rights laws that are politically costly to pursue. I argue that states’ resistance is made possible by adopting more viable policy alternatives, i.e., concluding preferential trade agreements (PTAs). PTAs can generate considerable economic gains in a less politically costly way than does reducing legal labor protection. As a result, it is expected that a pair of states is more likely to form a PTA in th

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Iommi, Godofredo, and Anibal Velozo. "Pressure, Poincaré series and box dimension of the boundary." Nonlinearity 34, no. 6 (2021): 3936–52. http://dx.doi.org/10.1088/1361-6544/abfecf.

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37

Hu, Huyi. "Box Dimensions and Topological Pressure for some Expanding Maps." Communications in Mathematical Physics 191, no. 2 (1998): 397–407. http://dx.doi.org/10.1007/s002200050272.

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Choudhary, Shaista, Akshay Singh, and Umakant Sharma. "A Research Paper on Manual Design and Modelling of Box Culvert." International Journal for Research in Applied Science and Engineering Technology 11, no. 5 (2023): 24–26. http://dx.doi.org/10.22214/ijraset.2023.51369.

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Abstract: Box culverts are the structures which are used when the path of water in the natural stream crosses roads, railway lines, flyovers etc. They are normally cheaper than bridges, which make them the natural stream passes through channels. In this work, the review of various authors and their views in the design and analysis of box culvert with software approach and comparison between software and manual approach has shown. The IS standard requirements in the design manual for roads and bridges (IRC-6-2000, IS 21-2000) is used in the structural designing of concrete box culverts. In this

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Wu, Chongzhong, Xianlin Jia, Tiaojian Xu, and Wo Zhang. "Numerical Simulation of the Hydrodynamic Behavior of an Offshore Platform Supported by a Jacket Structure in Waves." Water 16, no. 24 (2024): 3707. https://doi.org/10.3390/w16243707.

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The offshore jacket structure has the advantages of suitable stiffness, convenient construction, anti-collision, and strong fatigue resistance, and it is the main structural form of offshore converter station. By constructing a numerical wave tank for the hydrodynamic response analysis of the offshore jacket structure, the wave field distribution around and the wave slamming load on the offshore jacket structure for the converter station under the action of waves are analyzed based on the Star CCM+ software 2206. In addition, the effects of wave height and wave period on its hydrodynamic loads

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Kitiyakara, Taya, Patarapong Kamalaporn, Akharawit Poolsombat, Patthama Anumas, Thanyaluck T. Tawarate, and Kesrada Akkanit. "Leak-Testing of an Endoscopic Aerosol Box for Preventing SARS-CoV-2 Infection during Upper Gastrointestinal Endoscopy." Siriraj Medical Journal 73, no. 10 (2021): 702–9. http://dx.doi.org/10.33192/smj.2021.90.

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Objective: The SARS-CoV-2 virus has infected many healthcare professionals. Endoscopy is an aerosol-generating procedure and the endoscopy team is at risk of exposure and infection. We describe the leak-testing of an aerosol box that uses a glove-covering for the endoscope.Materials and Methods: An endoscopic aerosol box with a glove-covering over the endoscope was made for gastroscopy, EUS and ERCP procedures and was tested for leakage of aerosol/airborne particles. Fine particulate matter (PM) from burnt incense sticks was used as a model for viral aerosol. The leakage from the box was measu

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Li, Dong, Shijie Dai, and Tao Lin. "Evaluation of the Explosion Pressure Parameters in Flameproof Enclosures under the Pressure Piling Condition." Energies 14, no. 23 (2021): 8156. http://dx.doi.org/10.3390/en14238156.

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Explosion resistance is one of the most important performances for all flameproof enclosures. Pressure piling requires the flameproof enclosures to withstand explosion pressure higher than the design pressure. In order to study the explosion parameters in a flameproof enclosure under pressure piling, two experimental setups were prepared based on the theoretical analysis of the mechanism of pressure piling. One setup simulated the condition that the interior of a flameproof box is isolated by a baffle with a small hole. Another setup simulated the condition that a large number of electrical co

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Zhao, Xing, Xiaoyang Jia, Lin Li, and Hanyu Wang. "Analysis of Acoustic Flow Field Characteristics of Key Components of High-Speed Train Bogies." Applied Sciences 13, no. 19 (2023): 11065. http://dx.doi.org/10.3390/app131911065.

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In this paper, we aim to address the challenge of airflow interference during fault detection in high-speed train bogies by introducing a flow field and investigating the characteristics of the sound field distribution of critical components under its influence. This approach overcomes the limitation observed in previous studies that ignored the impact of the flow field. Furthermore, we evaluate and compare various layouts for inter-track acoustic sensor arrays. The study results demonstrate that the axle box and gearbox are primarily affected by frequency bands above 200 Hz, while the motor i

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Yuan, Zhuo Li, Hao Cai Huang, Yan Ying Ye, and Jian Xing Leng. "Study on the Titanium Film in the Pressure Self-Adaptive Water-Tight Junction Box of Underwater Vehicle." Advanced Materials Research 538-541 (June 2012): 16–22. http://dx.doi.org/10.4028/www.scientific.net/amr.538-541.16.

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Water-tight junction box (WJB) is one of key underwater vehicle technologies, which is indispensible in nowadays underwater engineering. Taking the advantage of large deformation range and corrosion resistance characters of the titanium material, this paper utilizes the titanium thin film material to put forward a titanium film pressure adaptive compensator (TFPAC) which solves the pressure problem and improves the reliability of the WJB greatly. The finite element analysis (FEA) software ANSYS is used to analyze the stress and strain condition of the titanium film when the film is suffering t

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Tang, Longjiang, Jungang Wang, Huizhong Zhu, Maorong Ge, Aigong Xu, and Harald Schuh. "A Comparative Study on the Solar Radiation Pressure Modeling in GPS Precise Orbit Determination." Remote Sensing 13, no. 17 (2021): 3388. http://dx.doi.org/10.3390/rs13173388.

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For Global Positioning System (GPS) precise orbit determination (POD), the solar radiation pressure (SRP) is the dominant nongravitational perturbation force. Among the current SRP models, the ECOM and box-wing models are widely used in the International GNSS Service (IGS) community. However, the performance of different models varies over different GPS satellites. In this study, we investigate the performances of different SRP models, including the box-wing and adjustable box-wing as a priori models, and ECOM1 and ECOM2 as parameterization models, in the GPS POD solution from 2017 to 2019. Mo

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Abbas, Basim Aboud, Abdulrazzak A. Jasim, and Luma K. Bander. "Comparing Different laboratory Methods for Measuring the Feed Pellet Durability." Kufa Journal for Agricultural Sciences 16, no. 3 (2024): 50–60. http://dx.doi.org/10.36077/kjas/2024/v16i3.11401.

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The experiment aimed to compare different methods of measuring the Feed pellet durability through the effect of pellet die speeds and the particle size (mill sieve holes diameter). Feed pellet durability was studied in four different ways: pellet direct measurement (%), pellet lengths (%), pellet water absorption (%), pellet durability by drop box device (%), pellet durability by air pressure device (%). Three pellet die speeds 280, 300, and 320 rpm, three mill sieve holes diameter 2, 4, and 6 mm, have been used. The results showed that increasing the pellet die speeds from 280 to 300 then to

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R, Satheesh, Santhosh R, Chandru V, and Keerthi Vasan K. "Black box for trucks using labview." International Journal of Multidisciplinary Research Transactions 6, no. 3 (2024): 83–92. https://doi.org/10.5281/zenodo.11080361.

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In our nation, the amount of traffic is growing daily. In many regions, individuals are not responding well to traffic regulations. Careless and too fast driving are the main causes of accidents. Particularly in the school and college zones, many are reluctant to slow down to the absolute minimum. This embedded project is designed to alert the driver of an excessive speed and provide control over the vehicle. Wireless communication is used in the construction of this. We are use a microcontroller called MyRio. In order to monitor the temperature of the tires, we have an interfaced temperature

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Volod’ko, Oleg, Aleksandr Bychenin, and Oleg Chernikov. "PRESSURE ACCUMULATOR DISCHARGE EFFECT ON GEAR SHIFT WITH HYDRAULIC CONTROL BOX." Bulletin Samara State Agricultural Academy 5, no. 3 (2020): 25–31. http://dx.doi.org/10.12737/38765.

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The purpose of the study is the reduction of the time of hydraulic couplings slipping by optimization of hydraulic accumulator discharge pressure. When operating tractors with hydroshift transmission at loads close to the nomi-nal values, there is a problem of slipping of the friction coupling during gear shift without interruption in torque de-livery. There is a critical scientific problem of reducing the slipping of hydroshift transmission during the operation of major tractors. Theoretical prerequisites for increasing friction force due to the reduction of slipping via the re-duction of gea

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Meininger, G. A., and J. E. Faber. "Adrenergic facilitation of myogenic response in skeletal muscle arterioles." American Journal of Physiology-Heart and Circulatory Physiology 260, no. 5 (1991): H1424—H1432. http://dx.doi.org/10.1152/ajpheart.1991.260.5.h1424.

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The myogenic response was studied in large skeletal muscle arterioles in the presence of varying degrees of constriction with norepinephrine (NE; 3 x 10(-8) to 1 x 10(-5) M) or potassium chloride (KCl, 40-120 mM). The cremaster muscle of anesthetized rats was exteriorized into a Krebs-filled tissue bath chamber for observation of the microvasculature using a video microscopy system. The body of the rats was enclosed in an airtight Plexiglas box that was pressurized from 0 to +30 mmHg to raise intravascular pressure and elicit the myogenic response. All experiments were performed in acutely den

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McGuigan, Benjamin L., Olajide Samuel Oshati, Bethanie A. Parker, and Arun J. Valsangkar. "Post-construction performance of induced trench rigid culverts." Canadian Geotechnical Journal 53, no. 11 (2016): 1807–21. http://dx.doi.org/10.1139/cgj-2016-0088.

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Induced trench construction is commonly used to reduce earth pressures on rigid circular and box culverts. Most of the reported literature pertains to the performance of induced trench culverts during construction and shortly after construction. This paper addresses the post-construction performance of induced trench culverts. First, results of field inspection reports are presented as an indirect assessment of performance of 90 induced trench culverts installed in New Brunswick that have been in service for up to 24 years. Second, earth pressure measurements are presented from three case stud

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Daye, RM, ML Huber, and RA Henderson. "Interlocking box jejunostomy: a new technique for enteral feeding." Journal of the American Animal Hospital Association 35, no. 2 (1999): 129–34. http://dx.doi.org/10.5326/15473317-35-2-129.

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A new jejunostomy tube placement technique is described and compared to traditional methods. The interlocking box technique was compared to a simple purse-string with jejunopexy and an inverting serosal tunnel (Witzel technique) with jejunopexy. Procedures performed in fresh canine cadavers were fluid pressure tested following tube removal. Mean+/-standard deviation (SD) intraluminal pressure necessary to induce leakage at the jejunopexy site of the interlocking box group (87.63+/-40.56 cm H2O) was significantly greater (p less than 0.001) than the simple purse-string (43.17+/-31.69 cm H2O) an

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