Pressure effect

This study focuses on investigating the effect of negative pressure on the structure and diffusion processes of Silicon dioxide at liquid nitrogen temperature. The insights gained from this study will serve as a foundation for future experimental research aimed at the development and manufacturing of advanced materials.

11p viengfa 28-10-2024 2 2   Download

This study focuses mainly on the normal stresses that are caused by applied forces. As a case study, the present work aims at investigating the bi-dimensional contact mechanics of wavy cosinusoidal anisotropic finite planes. To achieve this objective, results on the displacement and stress component are first calculated with the help of the Lekhnitskii formalism.

9p vibecca 01-10-2024 1 1   Download

In this study, the influence of injector structure and fuel injection pressure on injection mass as well as the influence of injection pressure on the development of the fuel spray are presented.

14p vibecca 01-10-2024 1 0   Download

The effect of technological parameters such as gas pressure, cutting current, standoff distance, and cutting speed on the cutting surface quality of CNC plasma cutting process was investigated. The experiment was carried out by Bruco CNC plasma cutting machine for CT3 steel with different thicknesses.

12p vibecca 01-10-2024 2 2   Download

This study aims to investigate the effect of confining pressure on the shear resistance of UHPFRCs reinforced with different types of fiber: 1.5 vol.-% of the short smooth (SS, l/d = 13/0.2) fiber and the long smooth (LS, l/d = 30/0.3) were investigated.

8p vifilm 24-09-2024 3 1   Download

Drug therapy to achieve the recommended target blood pressure remains the cornerstone of the management of hypertension. Today, there are strong evidences from randomized controlled trials that antihypertensive drugs are more effective than placebo at reducing cardiovascular mortality and morbidity.

8p vifaye 20-09-2024 3 1   Download

To assess the prevalence and general characteristics of obstructive sleep apnea syndrome in patients with hypertension, investigate the relationship between obstructive sleep apnea syndrome and blood pressure, and the effectiveness of continuous positive pressure ventilation treatment after 1 month in hypertensive patients with obstructive sleep apnea.

8p vinatisu 29-08-2024 5 1   Download

In this thesis, a numerical model with detailed reaction mechanism which is tailored for studying the behaviour of combustion of natural gas has been introduced and validated with available experimental data. The numerical model attempts to comprehensively simulate the physical conditions (temperature and pressure), equivalent ratio, and fuel dilution and strain rate effect in the laminar flames.

158p runthenight05 01-03-2023 15 3   Download

The primary objective of this work is to study the aerodynamic pressures on Mirror Surface at Various speeds to determine the effects of aerodynamics on to Mirror vibration. Additionally, the Mirror was modified by Shrouding around the external periphery to determine the possibility of minimisation of aerodynamic pressure fluctuations and thereby vibration. The Shrouding length used for the analysis was of 24mm, 34mm and 44mm length.

207p runthenight05 01-03-2023 7 3   Download

The objectives of the current study are to develop a methodology to estimate the optimal size of the rainwater tank at a particular location considering the local rainfall, roof area, demand for water and the reliability of supply (supply security) required; to quantify the rainwater volume that could be harvested at site using domestic rainwater tanks to minimise pressure on the potable water supply secured from traditional catchment sources until the desalination plant is commissioned in 2013; to analyse the efficacy of rainwater tanks to reduce the stormwater runoff and improve the quali...

226p runthenight05 01-03-2023 6 3   Download

In this research the effect of ground proximity on the lift, drag and moment coefficients of inverted, two-dimensional aerofoils was investigated. The purpose of the study was to examine the effect ground proximity on aerofoils post stall, in an effort to evaluate the use of active aerodynamics to increase the performance of a race car. The aerofoils were tested at angles of attack ranging from 0° – 135°. The tests were performed at a Reynolds number of 2.16 x 105 based on chord length. Forces were calculated via the use of pressure taps along the centreline of the aerofoils.

144p runthenight07 01-03-2023 8 4   Download

The report of an IUPAC Task Group, formed in 2011 on “Intensities and line shapes in high-resolution spectra of water isotopologues from experiment and theory” (Project No. 2011-022-2-100), on line profiles of isolated high-resolution rotational-vibrational transitions perturbed by neutral gas-phase molecules is presented.

13p runordie3 27-06-2022 9 3   Download

A study on: “Study of the pedicle superior gluteal artery perforator flaps with vacuum asisted closure therapy for chronic ulcer sacral reconstruction” with the following objectives: Description of anatomy of AP vascular aneurysms and effectiveness evaluation of skin lesions AP Superior gluteal Artery Perforater combined with negative pressure for the treatment of chronic ulcers.

29p petsematary 02-06-2021 28 3   Download

Alfalfa is an important medicinal plant having stachydrine as alkaloid and used as laxative, digestive, diuretic and treating for dropsy, blood pressure, hair loss, acidity and arthritis. Present investigation was carried out during rabi season 2019-20, Dept. of PMA, College of Horticulture, Bagalkote with the objective to study the effect of plant growth hormones on yield characteristics of Alfalfa (Medicago sativa L.) under Northern dry Zone of Karnataka.

10p trinhthamhodang11 27-04-2021 15 2   Download

Oil was extracted from moringa (PKM-1) seed kernel by using supercritical fluid (SCCO2) extraction process. Supercritical fluid pressures of 100, 150 and 200 bar and temperatures of 40, 50 and 60 °C were considered for SC-CO2 extraction process. Maximum extraction yield of 37.76 g/100g and extraction efficiency of 98.43% were obtained at supercritical fluid pressure of 200 bar and temperature of 40 °C.

12p trinhthamhodang11 27-04-2021 18 1   Download

We build the theory of diffusion for FCC binary interstitial alloy under pressure based on the statistical moment method, where there are the analytic expressions of the jumping frequency of interstitial atom, the effective jumping length, the correlation factor, the diffusion coefficient, and the activated energy. In limit cases, we can obtain the diffusion theory for FCC metal A under pressure.

6p tamynhan5 10-12-2020 6 1   Download

Based on the Cornwall-Jackiw-Tomboulis effective action approach, a theoretical formalism is established to study the hydrodynamic instabilities in two-component condensates of Bose gases. The effective potential is found in the Hartree-Fock approximation and this quantity is then used to derive the expression for the pressure, which depends on particle densities.

8p tamynhan9 02-12-2020 13 4   Download

Some thermodynamic quantities of ZrxCe1-xO2/CeO2 systems are investigated by using the moment method in statistical dynamics taking into account the anharmonicity effects of lattice vibrations. The analytic expression of the Gibbs free energy, Helmholtz free energy, and specific heats at the constant volume of ZrxCe1-xO2/CeO2 systems are obtained.

11p tamynhan9 02-12-2020 13 1   Download

The coefficients of thermal expansion of thin metal film with face-centered cubic structure at zero pressure are investigated using the statistical moment method (SMM), including the anharmonic effects of thermal lattice vibration. The Helmholtz free energy, mean-square atomic displacement and linear thermal expansion coefficients are derived in closed analytic forms in terms of the power moments of the atomic displacement.

8p tamynhan8 04-11-2020 14 1   Download

This paper studies the structure of the Mullite system (3Al2O3.2SiO2) by Molecular Dynamics simulation (MDs) using the Born–Mayer–Huggins pair interaction and periodic boundary conditions. The simulation was performed with model of 5250 atoms at different pressure and at 3500 K temperature.

7p tamynhan6 14-09-2020 17 2   Download