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Presence Of Atheromatous Plaques And Theirs Effects On The Blood Flow, Belhocine Mostefa Bm, Amrani Hichem Ah, Fedaoui Kamel Dr, Mazouz Hammoudi Mh

Emirates Journal for Engineering Research

The paper utilizes a finite element method to study both the blood flow and atheromatous plaques. Specifically, the COMSOL finite element package is employed to achieve a fluid model. COMSOL is a powerful finite element tool commonly used in various research and industrial domains to study multiphysics problems. The focus of the investigation is on the geometric aspects of the atheromatous plaques. The study considers different forms and arrangements of stenosis, taking into account the irregularities formed by various shapes of the plaques and the resulting flow patterns. The key findings of the research suggest that the pressure and velocity …

Phys 444 - 002: Fluid And Plasma Dynamics, Satoshi Inoue

Physics Syllabi

No abstract provided.

Magnetic Field’S Effect On Two-Phase Flow Of Jeffrey And Non-Jeffrey Fluid With Partial Slip And Heat Transfer In An Inclined Medium, Sunday Lot, Waheed Oluwafemi Lawal, Adedapo Chris Loyinmi

Al-Bahir Journal for Engineering and Pure Sciences

In this paper, the effect of magnetic field on two –phase flow of Jeffrey and non-Jeffrey fluids in an inclined medium is investigated. The flow in both medium is assumed to be set in motion by constant pressure gradient. The electrical conductivity in the non-Jeffrey fluid in phase I is considered to be zero, so that the constant magnetic field strength Bo in the transverse direction only affects the Jeffrey fluid in phase II. The equations governed the flow of the fluid were solved using perturbation method. The effect of magnetic field, Jeffrey and thermal slip parameters on the temperature …

Interactive Water Vortex Exhibit, Simon Way, Emily Laing, Roqaya Naseri, Makenzie Kan

Mechanical Engineering

The San Luis Obispo Children’s Museum requested an interactive water vortex exhibit to both engage and entertain inquisitive guests, ages two to eight. The goal was to design and manufacture an exhibit that would educate its users on the fluid mechanics behind water vortices. They activate the mechanics by spinning a wheel, which is perceived as the catalyst to manipulate the flow of water to successfully create a whirlpool. Our team has created an interactive display that will enlighten young minds, providing the museum with an educational exhibit which shares a concept not currently taught by any other. Our project …

Fluid Intake And Hydration Responses To Mass Participation Gravel Cycling, Brandon Raik, Francis Salmon, Grace Handler, Matthew M. Schubert

International Journal of Exercise Science: Conference Proceedings

Gravel cycling is a relatively new cycling discipline, with the Union Cycliste Internationale (UCI) hosting their first UCI Gravel World Championships in 2022. Gravel races combine features of road racing, cyclocross, and mountain biking, including various terrain of varying technical difficulty (paved roads, dirt roads, fire roads, single- and double-track trails), long distances, substantial vertical elevation gain, obstacles, and limited opportunities to stop for in-race nutrition. PURPOSE: To date, gravel racing has not been scientifically examined to determine the demands of the sport. Data from cycling road races indicate substantial fluid loss, which may impair exercise performance. This study assessed …

Uncertainty Quantification And Constraint Of Chemical Kinetic Mechanisms Based On Flow Reactor Experiments, Ana Victoria Kock

Theses and Dissertations

The chemical kinetic model is one of key sub-models for computational fluid dynamics (CFD) simulation for optimizing and designing various combustors/engines. Detailed chemical kinetic models can consist of hundreds of species and thousands of elementary reaction steps. Considering the complexity in these detailed chemical kinetic models, it is important to quantify and minimize the uncertainties in the kinetic parameters. The uncertainties in the kinetic models can then be compared to uncertainties tied to experimental measurements. This approach has been frequently applied for relatively simple combustion parameters (e.g., laminar flame speed, ignition delay time), however it has not been well utilized …

Nfpa Fluid Powered Vehicle Challenge 2023, Joshua A. Romano, Milo T. Klein, Marius Tali, Connor C. Getz, Yael G. Valdez

Mechanical Engineering

This report includes the design process undergone by Team Shifty in designing a vehicle for the NFPA’s Fluid Powered Vehicle challenge. The report covers the background of the competition, research done by the team, engineering specifications for the design, preliminary and final designs, the manufacturing plan and process, project management details, and several recommendations for future teams participating in the challenge.

The National Fluid Power Association, NFPA, is a trade association with the goal of connecting fluid power companies and advancing fluid power. With the goal of advancement in mind, NFPA hosts an annual Fluid Powered Vehicle Challenge (FPVC). Since …

Chinese Political Rhetoric And Ideology: Tension And Pretension, Israel Paredes

Honors Theses

This changing nature of the Chinese government’s ideology leads one to believe that its core beliefs are not dogmatic, despite the foundation for their ideology being rooted in specific societal and economic theories. Starting with Mao Zedong to modern day, the Chinese government officials will continue to support the original tenets (and, no doubt, future presidents’ additions to the tenets). However, the interpretation of their ideology over time is fluid and is used to support policies and actions during a political cycle. Chinese political leaders are unlikely to disagree with a past leaders, and will rather use their own interpretation …

Differential Effects Of Oral Vs. Intravenous Fluid Administration On Bioelectrical Impedance During Dehydration Induced By Exercise And Heat, Sarah J. White, Alan T. Ky, Yasuki Sekiguchi, Grant M. Tinsley

International Journal of Exercise Science: Conference Proceedings

There is continued debate regarding optimal evaluation of hydration. Bioimpedance analysis has been utilized to evaluate hydration status, but there is limited information regarding the ability of this technology to detect physiological changes occurring during acute dehydration. PURPOSE: To evaluate whether bioimpedance spectroscopy (BIS) detects changes in bioelectrical resistance (R) in response to dehydration induced by exercising in the heat, assess whether these changes are related to body mass changes, and determine if the route of fluid administration during the dehydration protocol influences these observations. METHODS: Twelve males (mean ± SD; age: 28.6 ± 12.4 y; body mass: …

Mascs: Masculinity Reimagined, Josh Porter

Graduate Thesis Exhibition Catalogue Gallery, 2023

MASCS: Masculinity Reimagined explores how performances of contemporary masculinities can counteract traditional binary understandings of gender. Justin Korver, John Paul Morabito, Betsy Odom, Moises Salazar, and Darryl DeAngelo Terrell expose, question, and subvert the ways that we culturally define masculinity by focusing on gender as performance. These artists not only critique cisgender, heteronormative binary understandings of masculinity, but also embrace the performative nature of gender and celebrate non-normative, alternative, and queer masculinities. By encompassing a range of gender and sexual identifications, these artists share their own personal experiences, interpretations, performances, rejections, and embodiments of masculinity. Breaking down the barrier created …

Fluid Power Vehicle Challenge, Bryce Towne, Ethan Andrews, Carter Moore, Andrew Sobel

Williams Honors College, Honors Research Projects

The Fluid Power Vehicle Challenge is a competition held by the National Fluid Power Association (NFPA) that challenges students to create a hydraulically powered vehicle to compete in four different races over two days. The vehicle has to be fully powered by hydraulics, with human power (such as pedaling) being used to move the hydraulic fluid. Electronics and pneumatics can be used to control the flow of the hydraulic oil. Vehicles also must have an energy storage device to take advantage of regenerative braking. The final competition was at the Norgren facility in Colorado from April 12th to April 14th. …

Quasi 1d Modelling Of A Scramjet Engine Cycle Using Heiser-Pratt Approach, Asmaa Chakir

Theses and Dissertations

Scramjet engines are key for sustained hypersonic flights. Analytic models play a critical role in the preliminary design of a scramjet engine configuration. The objective of this research is to develop and validate a quasi-1D model for the scramjet engine encompassing inlet, isolator and combustor, to evaluate the impact of flight conditions and design parameters on the engine functionality. The model is developed assuming isentropic flow in the inlet with a single turn; modified Fanno-flow equations in the isolator that account for the area change of the core flow; and the combustor is modeled using Heiser-Pratt equations accounting for the …

The Effect Of Apical Axillary Lymph Node Dissection On The Incidence Of Upper Arm Lymphedema, Ahmed S. Elgammal, Ahmed A. Fawzy, Mohammed N. S. Nassar

Menoufia Medical Journal

Objectives The aim of this study is to determine the relation between apical axillary lymph node dissection (ALND) and upper arm lymphedema in patients with breast cancer. Background Lymphedema is a swelling that occurs when protein-rich lymph fluid accumulates in the interstitial tissue, and it is the most common complication following axillary dissection. This lymph fluid may contain plasma proteins, extravascular blood cells, excess water, and parenchymal products. Few studies have discussed ALND levels as a possible risk factor of upper arm lymphedema. Patients and methods This is a prospective clinical study that included 70 women with well-established diagnosis of …

Physically Based Rendering Techniques To Visualize Thin-Film Smoothed Particle Hydrodynamics Fluid Simulations, Aditya H. Prasad

Dartmouth College Undergraduate Theses

This thesis introduces a methodology and workflow I developed to visualize smoothed hydrodynamic particle based simulations for the research paper ’Thin-Film Smoothed Particle Hydrodynamics Fluid’ (2021), that I co-authored. I introduce a physically based rendering model which allows point cloud simulation data representing thin film fluids and bubbles to be rendered in a photorealistic manner. This includes simulating the optic phenomenon of thin-film interference and rendering the resulting iridescent patterns. The key to the model lies in the implementation of a physically based surface shader that accounts for the interference of infinitely many internally reflected rays in its bidirectional surface …

Design, Modeling, And Control Of Soft Dynamic Systems, Yaorui Zhang

Dartmouth College Master’s Theses

Soft physical systems, be they elastic bodies, fluids, and compliant-bodied creatures, are ubiquitous in nature. Modeling and simulation of these systems with computer algorithms enable the creation of visually appealing animations, automated fabrication paradigms, and novel user interfaces and control mechanics to assist designers and engineers to develop new soft machines. This thesis develops computational methods to address the challenges emerged during the automation of the design, modeling, and control workflow supporting various soft dynamic systems. On the design/control side, we present a sketch-based design interface to enable non-expert users to design soft multicopters. Our system is endorsed by a …

Numerical Simulation Of Losses In Four-Way Pipe Junctions, Simon Barth

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

To design pipelines, engineers need to know how much energy the fluid in the pipe has at different locations in the pipe network. The energy the fluid has comes in the form of pressure, velocity, and elevation. As fluid travels through a pipe, it loses energy for many different reasons. Some of those reasons include friction between the fluid and the pipe wall, shear forces within the fluid, changes in flow direction, changes in elevation, or various pipe fittings like elbows, tee’s, valves, reducers, and expanders. Many of the causes of energy loss are well researched. One cause of energy …

The Use Of Ultrasound Indices To Evaluate Volume Status And Fluid Responsiveness In Patients With Septic Shock, Ashraf A. H. Mahmoud, Wael A. E. El Hakeem

Journal of Medicine in Scientific Research

Objective The purpose of this study is to assess the use of ultrasound indices to evaluate volume status and fluid responsiveness in patients with septic shock. Patients and methods A total of 40 successive patients aged above 40 years, with septic shock on admission to the ICU, were enrolled in the study, comprising 26 fluid responders and 14 fluid nonresponders. Results Regarding demographic data and other patient characteristics, no statistically significant difference between both the study groups was seen. Regard baseline hemodynamics data, there was no statistically significant difference between both groups. but after fluid bolus, there was a statistically …

Hydraulic Vehicle Challenge, Jacob Steiner, David Kotovets, Evan Blitz, Luke Fetherston, Alex Colucy

Williams Honors College, Honors Research Projects

The target goal of this project is for a team of students to design a vehicle which is based on human power as the primary mover of the system and achieves vehicle propulsion through the required use of hydraulics and pneumatics. In summary, the rider will power a pump that will generate pressure in order to move the fluid that drives the motor. This will result in the powered rotation of the wheels. As there are many possible designs, naturally, this means that the final design for the vehicle will have specific limitations such as weight and the required use …

Horizontal Vibration Response Analysis Of Piles In Liquefied Soil Under Winkler Foundation Model, Xiong Hui, Yang Feng

Rock and Soil Mechanics

By considering the condition of vertical load, the soil after complete liquefaction is regarded as fluid, and the pile foundation is equivalent to the Euler-Bernoulli beam model. The vibration impedance of the top of the pile foundation embedded in the pile bottom is discussed. Simulating liquefied soil using fluid dynamic equation and simulating lower non-liquefied soil layer with Winkler foundation, combined with the continuous conditions of displacement, rotation angle and internal force at the interface between the liquefied soil and the non-liquefied soil, the relationship between displacement and internal force expression of pile’s top and pile’s bottom is obtained by …

The Great Flood: An Exploration Of Fluid Resuscitation In Sepsis, Adam Olsson

Theses and Graduate Projects

Sepsis and septic shock continue to be major causes of in-hospital mortality. The World Health Organization (WHO) declared sepsis as a global health top priority as of 2017. To combat sepsis mortality, the Surviving Sepsis Campaign (SSC) released the first set of guidelines in 2004 and continues to publish treatment guidelines, updating the guidelines every four years based on emerging evidence. The 2018 update to the 2016 guidelines contains an Hour-1 Bundle released by the SSC, which includes a rapid infusion of a 30 ml/kg fluid bolus as a strong recommendation with low quality evidence. Recently, studies have challenged this …

Prediction Of The Optimal Catheter Placement Selection For Therapy Infusion To Treat Brain Tumors, Lisa Hope Antoine

All ETDs from UAB

ABSTRACT In 2020, the National Brain Tumor Society reported that physicians would diagnose more than 87,000 new cases of brain tumors. These cases will add to the approximately 700,000 individuals in the United States living with brain and central nervous system tumors. Almost 18,000 of these cases will prove fatal [1]. The blood-brain barrier (BBB) hinders the effective treatment of brain tumors. The task of this barrier is to protect the brain from composition instabilities in blood plasma and shield the brain from agents that may adversely impact brain functionality. However, by performing its tasks the barrier prevents potential effective …

Vortex Fluidic Mediated Synthesis Of Polysulfone, Aghil Igder, Scott Pye, Ahmed Hussein Mohammed Al-Antaki, Alireza Keshavarz, Colin L. Raston, Ata Nosrati

Research outputs 2014 to 2021

Polysulfone (PSF) was prepared under high shear in a vortex fluidic device (VFD) operating in confined mode, and its properties compared with that prepared using batch processing. This involved reacting the pre-prepared disodium salt of bisphenol A (BPA) with a 4,4′-dihalodiphenylsulfone under anhydrous conditions. Scanning electron microscopy (SEM) established that in the thin film microfluidic platform, the PSF particles are sheet-like, for short reaction times, and fibrous for long reaction times, in contrast to spherical like particles for the polymer prepared using the conventional batch synthesis. The operating parameters of the VFD (rotational speed of the glass tube, its tilt …

Reviewing The Current Methods Of Assessing Hydration In Athletes, Oliver R. Barley, Dale W. Chapman, Chris R. Abbiss

Research outputs 2014 to 2021

Background

Despite a substantial body of research, no clear best practice guidelines exist for the assessment of hydration in athletes. Body water is stored in and shifted between different sites throughout the body complicating hydration assessment. This review seeks to highlight the unique strengths and limitations of various hydration assessment methods described in the literature as well as providing best practice guidelines.

Main body

There is a plethora of methods that range in validity and reliability, including complicated and invasive methods (i.e. neutron activation analysis and stable isotope dilution), to moderately invasive blood, urine and salivary variables, progressing to non-invasive …

Why The Ban On Nicotine Vape Fluid Will Do More Harm Than Good, Jody Morgan

Faculty of Science, Medicine and Health - Papers: Part B

Last week the federal government’s Office of Drug Control announced changes to the importation of nicotine-containing electronic cigarette fluids that will seriously affect the estimated 227,000 regular e-cigarette users in Australia. From January 1, 2021, users will no longer be allowed to import nicotine-containing fluids for use in e-cigarettes, even if they have a prescription. The measures, which were initially set to come into force on July 1, 2020, are in addition to the existing domestic ban on sales of these products.

Early Perioperative Fluid Benchmarking To Predict Pancreaticoduodenectomy (Pd) Outcomes, David Moskal, Carrie D. Walsh, Sofia Duque, Charles Yeo, Md, Facs, Harish Lavu, Md, Facs

Phase 1

Introduction: PD is a complex operation associated with a marked systemic inflammatory response and significant fluid shifts. Establishing a benchmark for ideal perioperative fluid management is critical to optimising PD patient recovery.

Methods: In this retrospective study, we evaluated perioperative fluid data for patients undergoing PD. We compared an optimal benchmark group who were discharged home by postoperative day five (≤5day) to a group of patients with an in hospital recovery greater than ten days (≥10day).

Results: Seventy-six patients who underwent PD between June 2015 and November 2016 were evaluated. The ≤5day group had a significantly lower intraoperative fluid administration …

Crystalloids Or Colloids… What’S In Your Iv? Determining Fluid Type For Septic Shock Resuscitation, Eleanor L. Jordan, Amy K. Lansing

Physician Assistant Capstones, 2016 to 2019

Objective: To compare the efficacy of crystalloid versus colloid solutions, specifically normal saline versus albumin, in decreasing mortality among patients with septic shock requiring resuscitation fluids in the intensive care unit (ICU) setting. Design: Systematic literature review. Methods: Research was conducted in PubMed and UpToDate, utilizing the search terms sepsis, septic shock, fluid resuscitation, colloids and crystalloids. Specifically, in PubMed, the following limits and terms were used: randomized control trial, human subjects, English, and within the last 7 years. Results: The Annane et al study found no significant difference in colloid fluid resuscitation versus crystalloid fluid resuscitation in the decreasing …

Method For Determining Hydraulic Resistance During, K. Navruzov, Z. K. Shukurov, A. Sh. Begjanov

Central Asian Problems of Modern Science and Education

In the article, pulsating fluid flows in tubes with changing walls, which are of great importance in biological mechanics, in particular, in the flow of blood in the arterial vessel, are investigated. The solution of the problem obtained formulas for the distribution of pressure gradient, velocity and flow rate. Impedance method analyzed the increase in hydraulic resistance depending on the frequency of oscillation. It was found that with large values 2  of hydraulic resistance grow with growth 2  . For crowding out the same flow rates, for small and with large values of the vibrational number or frequency, …

Method For Determining Hydraulic Resistance During, K. Navruzov, Z. K. Shukurov, A. Sh. Begjanov

Central Asian Problems of Modern Science and Education

In the article, pulsating fluid flows in tubes with changing walls, which are of great importance in biological mechanics, in particular, in the flow of blood in the arterial vessel, are investigated. The solution of the problem obtained formulas for the distribution of pressure gradient, velocity and flow rate. Impedance method analyzed the increase in hydraulic resistance depending on the frequency of oscillation. It was found that with large values 2  of hydraulic resistance grow with growth 2  . For crowding out the same flow rates, for small and with large values of the vibrational number or frequency, …

Extreme Oxygen Isotope Zoning In Garnet And Zircon From A Metachert Block In Melange Reveals Metasomatism At The Peak Of Subduction Metamorphism, F. Zeb Page, Emilia M. Cameron, Clara Margaret Flood, Jeffrey W. Dobbins, Michael J. Spicuzza, Kouki Kitajima, Ariel Strickland, Takayuki Ushikubo, Christopher G. Mattinson, John W. Valley

Faculty & Staff Scholarship

A tectonic block of garnet quartzite in the amphibolite-facies melange of the Catalina Schist (Santa Catalina Island, California, USA) records the metasomatic pre-treatment of high-delta O-18 sediments as they enter the subduction zone. The block is primarily quartz, but contains two generations of garnet that record extreme oxygen isotope disequilibrium and inverse fractionations between garnet cores and matrix quartz. Rare millimeter-scale garnet crystals record prograde cation zoning patterns, whereas more abundant similar to 200-mu m-diameter crystals have the same composition as rims on the larger garnets. Garnets of both generations have high-delta O-18 cores (20.8 parts per thousand-26.3 parts per …

The Effect Of Hydroabrasive Wear Of Centrifugal And Axial Pumps Units On Operation Efficiency Of Irrigating Pumping Stations, M Mamazhanov, B Uralov, S. Khidirov, G. I. Siderenko

Irrigation and Melioration

Cavitation occurrence in hydroabrasive flows which can lead to rather complex phenomena and complicate the understanding of the process essence is considered in the paper. To date, the wear of operating units in centrifugal and axial pumps, depending on the mode of their operation, has not been sufficiently studied and the methods to choose the operating modes considering the wear of their parts have not been developed. The paper presents the results of comprehensive laboratory and field studies on the wear rate of units in the flow part of centrifugal and axial pumps. An alternating pulsating load leads to an …