Abstract：
:An expression for centerline mean velocity distributions for circular and noncircular confined turbulent jets has been obtained by assuming self-preservation of flow downstream of the jet potential core. It was assumed that the velocity decay was not only dependent on the streamwise distance x in terms of x/d, as in the case of free jets, but also on the ratio of the orifice diameter d to the confining pipe diameter D. To validate the expression and to determine the empirical constants, measurements of the centerline velocities within the confined jets issuing from different size circular orifices and various noncircular orifices of different shapes were conducted. The results indicate that the validity of the expression is restricted to d/D < or =0.25 and is weakly dependent on the particular orifice shape. It is suggested that, as for the case of free turbulent jets reported earlier, that this expression may be used potentially to predict the valvular lesion size or to estimate the volume of valvular regurgitation for confined jets provided the value of D, which corresponds to the "atrial diameter," is known or statistically available.
journal_name
Ann Biomed Engjournal_title
Annals of biomedical engineeringauthors
Liu H,Winoto SH,Shah DAsubject
Has Abstractpub_date
1997-11-01 00:00:00pages
939-48issue
6eissn
0090-6964issn
1573-9686journal_volume
25pub_type
杂志文章abstract：:The kidney is one of the most radiosensitive organs; it is the primary dose-limiting organ in radiotherapies for upper abdominal cancers. The role of mitochondrial redox state in the development and treatment of renal radiation injury, however, remains ill-defined. This study utilizes 3D optical cryo-imaging to quanti...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章
doi：10.1007/s10439-019-02255-8
更新日期：2019-07-01 00:00:00
abstract：:The statistical distribution of von Mises stress in the trabeculae of human vertebral cancellous bone was estimated using large-scale finite element models. The goal was to test the hypothesis that average trabecular von Mises stress is correlated to the maximum trabecular level von Mises stress. The hypothesis was pr...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章
doi：10.1114/1.1318928
更新日期：2000-01-01 00:00:00
abstract：:The objectives were as follows: (1) estimating mean value of the overall hemoglobin glycation rate constant (k); (2) analyzing inter-individual variability of k; (3) verifying ability of the hemoglobin A1c (HbA1c) formation model to predict changes of HbA1c during red blood cells cultivation in vitro and to reproduce ...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章
doi：10.1007/s10439-011-0366-6
更新日期：2011-11-01 00:00:00
abstract：:The field of percutaneous coronary intervention has witnessed many progressions over the last few decades, more recently with the advancement of fully degradable bioabsorbable stents. Bioabsorbable materials, such as metallic alloys and aliphatic polyesters, have the potential to yield stents which provide temporary s...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章,评审
doi：10.1007/s10439-015-1413-5
更新日期：2016-02-01 00:00:00
abstract：:Using a three-dimensional propagation model of the human ventricular myocardium, we studied the role of fibrous structure in generating epicardial potential maps. This model represents the myocardium as an anisotropic bidomain with an equal anisotropy ratio, and it incorporates a realistic representation of anatomical...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章
doi：10.1114/1.73
更新日期：1998-11-01 00:00:00
abstract：:To better understand the relationship between kinetic processes of contraction and the dynamic features of an isometric twitch, studies were conducted using a mathematical model that included: (1) kinetics of cross bridge (XB) cycling; (2) kinetics of thin filament regulatory processes; (3) serial and feedback interac...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章
doi：10.1114/1.1366669
更新日期：2001-05-01 00:00:00
abstract：:Defibrillation efficacy testing is a common procedure at defibrillator implantation, with the objective to ensure that each patient receives a system with adequate shock efficacy. In this study, defibrillation shock efficacy as a function of shock energy was modeled by a dose response relationship. The frequency distr...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章
doi：10.1007/s10439-009-9890-z
更新日期：2010-04-01 00:00:00
abstract：:In this study we present a novel, robust method to couple finite element (FE) models of cardiac mechanics to systems models of the circulation (CIRC), independent of cardiac phase. For each time step through a cardiac cycle, left and right ventricular pressures were calculated using ventricular compliances from the FE...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章
doi：10.1007/s10439-006-9212-7
更新日期：2007-01-01 00:00:00
abstract：:The appropriateness of integrated information systems to the description of integrated biological systems is discussed. An integrated information system in the physiology of the regulation of respiration is argued to be a structural mathematical model of the system and the relational data base, which it can compute. I...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章
doi：10.1007/BF02363292
更新日期：1983-01-01 00:00:00
abstract：:Kiani et al. (Kiani, M. F., A. R. Pries, L. L. Hsu, I. H. Sarelius, and G. R. Cokelet, Am. J. Physics. 266: H1822-H1828, 1994) suggested that blood velocity, hematocrit, and nodal pressures can oscillate spontaneously in large microvascular networks in the absence of biological control. This paper presents a model of ...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章
doi：10.1114/1.1306346
更新日期：2000-06-01 00:00:00
abstract：:The relationship between laboratory and on-field performance of football helmets was assessed for 31 football helmet models selected from those worn by players in the 2015-2019 National Football League (NFL) seasons. Linear impactor tests were conducted with helmets placed on an instrumented Hybrid III head and neck a...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章
doi：10.1007/s10439-020-02627-5
更新日期：2020-11-01 00:00:00
abstract：:The effects of training on a person's ability to perceive, interpret and utilize information presented via the tactile sense were examined by using a dual-channel electrocutaneous tracking approach. The electrocutaneous code studied was linear pulse rate encoding of information. The stimulus had a pulse width of 200 m...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章
doi：10.1007/BF02367409
更新日期：1986-01-01 00:00:00
abstract：:In this paper, an intelligent proportional-integral-derivative (PID) control method is introduced to the robotic testing system for the biomechanical study of human musculoskeletal joints. For the testing system, the robot is a highly nonlinear and heavily coupled complicated system, and the human spinal specimen also...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章
doi：10.1023/b:abme.0000030759.80354.e8
更新日期：2004-06-01 00:00:00
abstract：:Currently, there are no clinically available tools or applications which could predict osteoarthritis development. Some computational models have been presented to simulate cartilage degeneration, but they are not clinically feasible due to time required to build subject-specific knee models. Therefore, the objective ...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章
doi：10.1007/s10439-018-02184-y
更新日期：2019-03-01 00:00:00
abstract：:A wide range of length and time scales are relevant to pharmacology, especially in drug development, drug design and drug delivery. Therefore, multiscale computational modeling and simulation methods and paradigms that advance the linkage of phenomena occurring at these multiple scales have become increasingly importa...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章,评审
doi：10.1007/s10439-016-1563-0
更新日期：2016-09-01 00:00:00
abstract：:Classically, the primary tool for quantifying the dynamics of vergence and other eye movements has been the main sequence. The main sequence is a plot of peak velocity versus response amplitude and is particularly useful for comparing the dynamics of a large number of eye movements over a range of response amplitudes....
journal_title：Annals of biomedical engineering
pub_type： 杂志文章
doi：10.1114/1.162
更新日期：1999-05-01 00:00:00
abstract：:The design and operating characteristics of the first self-contained in-the-ear device to deliver altered auditory feedback is described for applications with those who stutter. The device incorporates a microdigital signal processor core that reproduces the high fidelity of unaided listening and auditory self-monitor...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章
doi：10.1114/1.1541014
更新日期：2003-02-01 00:00:00
abstract：:The effects of tissue hydration and fixed charge density on hydraulic permeability and creep behavior of cartilaginous tissues have been investigated using the triphasic theory and finite element methods. The empirical model for hydraulic permeability of uncharged gels and Mackie and Meares (1955) model for ion diffus...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章
doi：10.1114/1.1615576
更新日期：2003-11-01 00:00:00
abstract：:Early stage changes in hypertensive arteries have a significant effect on the long-term adaptation of the arteries. Compared to the long-term adaptation, little is known about the early dimensional and functional changes in hypertensive arteries in the first few days of hypertension. To study the early stage changes i...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章
doi：10.1114/1.1376391
更新日期：2001-06-01 00:00:00
abstract：:A goal of the Human Research Program at National Aeronautics and Space Administration (NASA) is to analyze and mitigate the risk of occupant injury due to dynamic loads. Experimental tests of human subjects and biofidelic anthropomorphic test devices provide valuable kinematic and kinetic data related to injury risk e...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章
doi：10.1007/s10439-018-02147-3
更新日期：2019-02-01 00:00:00
abstract：:Despite cellular environments having dynamic characteristics, many laboratories utilized static polyacrylamide hydrogels to study the ECM-cell relationship. To attain a more in vivo like environment, we have developed a dynamic, DNA-crosslinked hydrogel (DNA gel). Through the controlled delivery of DNA, we can tempora...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章
doi：10.1007/s10439-011-0483-2
更新日期：2012-05-01 00:00:00
abstract：:Rapid technological advances have prompted the development of a wide range of telemonitoring systems to enable the prevention, early diagnosis and management, of chronic conditions. Remote monitoring can reduce the amount of recurring admissions to hospital, facilitate more efficient clinical visits with objective res...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章,评审
doi：10.1007/s10439-005-9068-2
更新日期：2006-04-01 00:00:00
abstract：:Collagen, the most commonly used extra-cellular matrix protein for tissue engineering applications, displays poor mechanical properties. Here, we report on the preparation and characterization of novel multi-component composite systems that incorporate a genetically engineered, biocompatible polymer (elastin-like poly...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章
doi：10.1007/s10439-013-0825-3
更新日期：2013-10-01 00:00:00
abstract：:An algorithm to track a rat swimming in a Morris Water Maze has been developed. The system is automatically configured to any pool and relative suitable light conditions. It tracks the rat's position and head pose 10 times per second. The output data is displayed in a bitmap and also in a text file. The system was tes...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章
doi：10.1114/b:abme.0000036650.32345.b6
更新日期：2004-08-01 00:00:00
abstract：:Fox and Lu derived an algorithm based on stochastic differential equations for approximating the kinetics of ion channel gating that is simpler and faster than "exact" algorithms for simulating Markov process models of channel gating. However, the approximation may not be sufficiently accurate to predict statistics of...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章
doi：10.1007/s10439-009-9635-z
更新日期：2009-04-01 00:00:00
abstract：:There has been considerable debate on the relative importance of biochemical stimuli and mechanical deformation in neutrophil adhesion in lung capillaries, a process observed following bacterial infection in the body. In contrast to venules, where the vessel diameter is larger than the leukocyte diameter (6-9 microm) ...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章
doi：10.1007/s10439-008-9437-8
更新日期：2008-04-01 00:00:00
abstract：:High-frequency ventilation (HFV) has not one but several histories. Proceeding along largely independent pathways are techniques using frequencies of 1-5 Hz and techniques using 10-40 Hz, the former being introduced by Sjostrand in 1971, the latter by Lunkenheimer in 1972. It was nearly ten years before it was recogni...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章
doi：10.1007/BF02407779
更新日期：1984-01-01 00:00:00
abstract：:Twenty-one 3.5-month-old female Sprague-Dawley rats were randomly assigned to three groups: BTX group, in which each rat received a single intramuscular injection of 2 U of Clostridium botulinum toxin (BTX) in the quadriceps femoris muscle of the right hind limb; BTX + SR group, in which each rat received a BTX inject...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章
doi：10.1007/s10439-011-0406-2
更新日期：2012-03-01 00:00:00
abstract：:When cells and the matrix of a tissue remodel, the mechanical properties of the tissue do change. The mechanical properties are expressed by constitutive equations. In this article the remodeling of the constitutive equation of the pulmonary artery is studied. The remodeling was induced in a rat breathing a gas whose ...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章
doi：10.1114/1.1380417
更新日期：2001-01-01 00:00:00
abstract：:In this paper, we aim to establish a new mathematical model that relates pulse wave velocity (PWV) to blood pressure (BP) for continuous and noninvasive BP measurement. For the first time, we derive an ordinary differential equation (ODE) expressing the fundamental relation between BP, elastic modulus G and PWV. The g...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章
doi：10.1007/s10439-009-9759-1
更新日期：2009-11-01 00:00:00
