Search Results
Results 301 - 350 of 498
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Chauhan A - - 2001
PURPOSE: The motion of a soft contact lens in the up-down or vertical (inferior-superior) and in-out (anterior-posterior) directions drives mixing in the post lens tear film. Thus, it is important to obtain an accurate assessment of lens motion. The commonly used experimental technique to measure the vertical motion, video microscopy, ...
Gray J A - - 2001
Botany is usually considered to be the gentlest of sciences with botanists being regarded as people who study relatively safe specimens, compared with, for example, anthropologists or microbiologists. However, botanists have their moments, particularly when collecting new species. The great botanists of the eighteenth and nineteenth centuries risked their lives ...
Catalano L W LW - - 2001
A new method of measuring digital range of motion (the Littler line method) is presented. When a Gaussian curve is centered over the Littler line and the appropriate area under the curve is computed, this area can provide a measure of the functional range of motion regained by an injured ...
Zhang K - - 2000
We report the discovery of a convective phenomenon found to occur in a rotating spherical system in which an inner convectively unstable fluid layer is bounded by a corotating outer convectively stable fluid layer. Although convection is thermally driven in the unstable interior, the resulting convective motions concentrate primarily in ...
James W. Davis,Whitman A. ...
g their heads left-and-right. c, Mallard duck bobbing his head to a nearby female. 2 courtship, Honey bees dance in a circle or figure-8 to signal the presence and location of a food source to the hive, Sceloporus lizards identify one another from push-ups, and chimpanzees sway from side-to-side as ...
Lachiewicz P F - - 2000
The usefulness of continuous passive motion after total knee arthroplasty remains controversial. The reported benefits include decreased rates of knee manipulation, deep vein thrombosis, and postoperative use of analgesics, and a greater range of motion. Other studies have reported increased wound complications, bleeding, and pain. Lack of consensus on the ...
Moritomo H - - 2000
Kinematics of the scaphotrapezio-trapezoidal joint during wrist flexion/extension motion (FEM) and radial/ulnar deviation (RUD) was investigated using a 3-dimensional dynamic motion analysis system. The scaphoid/trapezoid motion was found to be a rotational motion obliquely oriented relative to the sagittal plane of the wrist and described in an ulnoflexion/radial extension motion ...
Abdullaev SS - - 2000
Generic symmetry and transport properties of near separatrix motion in 11 / 2-degree-of-freedom Hamiltonian systems are studied. First the rescaling invariance of motion near saddle points, with respect to the transformation epsilon-->lambdaepsilon, chi-->chi+pi of the amplitude epsilon and phase chi, of the time-periodic perturbation, is recalled. The rescaling parameter lambda ...
Furuichi M - - 2000
By analyzing the steady state and time-resolved fluorescence anisotropy, the internal motions of chlorophyll a of light-harvesting chlorophyll a/b-protein complex (LHCII) were characterized in a dimyristoylphosphatidylcholine (DMPC) liposome. Corresponding to the thermotropic phase of the membrane, chlorophyll a showed an unique internal motion in LHCII. At the gel phase, two ...
Nester C J CJ School of Health Care Professions, University of Salford, - - 2000
Motion of the shank in the transverse plane is coupled with pronation and supination of the rearfoot, and so its motion relative to the foot can be used as an indicator of the pattern of motion in the rearfoot. Compared to the more commonly used assessment of motion in the ...
Ichimura K - - 2000
The macroscopic motion of liquids on a flat solid surface was manipulated reversibly by photoirradiation of a photoisomerizable monolayer covering the surface. When a liquid droplet several millimeters in diameter was placed on a substrate surface modified with a calix[4]resorcinarene derivative having photochromic azobenzene units, asymmetrical photoirradiation caused a gradient ...
Bassett D R DR - - 2000
Major technical advances have occurred within the last 10 years in the field of physical activity monitoring. The biggest one is real-time data acquisition, and the development of computer microchips that allow vast amounts of information to be stored and later recalled. It is evident that no single motion sensor ...
Freimuth A - - 2000
In the mixed state of superconductors the spectral flow of fermion zero modes in the vortex core couples the motion of vortices to that of the normal fluid. This gives rise to a heat current perpendicular to the direction of vortex motion and therefore to longitudinal thermomagnetic effects like the ...
Féry Y A - - 2000
This study explores the way people appraise the duration of motions when these are only seen momentarily. Three possible theoretical accounts of this skill were developed. The first and second held an analogy between the duration of motions and their visuospatial representations. The third account was based on the existence ...
Watanabe Y - - 2000
To analyze the effect of the seat characteristics on dummy motions and human volunteer motions, sled tests simulating low-speed rear impacts were conducted with some seats which had different characteristics. Volunteer's cervical vertebral motions were photographed with an X-ray cineradiographic system at a speed of 90 frames/s as well as ...
Marras W S - - 2000
STUDY DESIGN: An examination of a group of patients with low back disorder and a group of healthy (asymptomatic) individuals asked to produce trunk motions under sincere and insincere experimental conditions. Trunk motion components were examined to determine which combination of motion components could best distinguish between sincere and insincere ...
Hayashi T - - 2000
The echocardiographic correlation between abnormal interventricular septal motion including systolic paradoxical, flat motion and early diastolic notch and ejection fraction, mean ventricular circumferential fiber shortening and early diastolic mitral filling velocity was studied in 46 patients with complete left bundle branch block. Systolic normal interventricular septal motion was used as ...
Dananberg H J - - 2000
During walking, the center of body mass must pass from behind the weightbearing foot to in front of it. For this to take place, the foot must function as a sagittal plane pivot. Because the range required for this motion is approximately five times as great as both frontal and ...
Naor-Raz G - - 2000
Fraser and Wilcox [1979 Nature (London) 281 565-566] devised a series of complex stationary patterns that provoked episodes of compelling illusory motion, but only in about two-thirds of people tested. Using simplified versions of their stimuli, we have confirmed their claim of perceptual dimorphism. We show that the strength of ...
Zhang J - - 2000
Male Wistar rats (n = 12) with the mesenteric preparation were used to quantitatively investigate the characteristics of wave-like propagation of spontaneous rhythmical lymphatic motion and to explore the mechanism of microlymphatic valve on the activity of lymphatic motion. The dynamical behaviors of collecting lymphatics were visualized by a closed ...
van der Steen F A - - 2000
A flight simulator was used to investigate the perception of self-motion and visual scene motion during the induction of saturated 10 deg/sec yaw and 50 m/sec surge vection, and during subsequent impairment of saturated vection by inertial motions. The subjects (n = 5) did not perceive any self-acceleration or visual ...
Joyce T J - - 2000
This paper describes the design of a pin on plate rig which has been modified to give multi-directional motion to the test pins, resulting in elliptical and quasi-elliptical wear paths. Such paths are closer to those seen in vivo by a femoral head articulating against an acetabular cup. The description ...
Newsam C J - - 1999
This investigation compared three dimensional upper extremity motion during wheelchair propulsion in persons with 4 levels of spinal cord injury: low paraplegia (n=17), high paraplegia (n=19), C7 tetraplegia (n=16), and C6 tetraplegia (n=17). Upper extremity motion was recorded as subjects manually propelled a wheelchair mounted on a stationary ergometer. For ...
Patterson R - - 1999
This paper reviews literature on the motion processing of dynamic change in binocular disparity, called stereoscopic (cyclopean) motion. Studies investigating the visual processing of stereoscopic motion in the Z-axis, stereoscopic motion in the X/Y plane, and cyclopean motion are discussed. It is concluded that stereoscopic motion is processed by a ...
Kelly T R - - 1999
The conversion of energy into controlled motion plays an important role in both man-made devices and biological systems. The principles of operation of conventional motors are well established, but the molecular processes used by 'biological motors' such as muscle fibres, flagella and cilia to convert chemical energy into co-ordinated movement ...
Peham C - - 1999
The aim of this study was to compare supporting forelimb lameness determined by a motion analysis system with the subjective grading of a trained equine orthopaedic surgeon. Trotting on a treadmill, 29 individuals with a supporting forelimb lameness were measured with the SELSPOT II system and judged by the clinician. ...
Chen J - - 1999
STUDY DESIGN: Meta-analysis of normative cervical range of motion literature performed by applying summary statistics to range of motion and reliability values reported among studies. OBJECTIVES: To identify reliable and valid methods for measuring active and passive cervical range of motion and to estimate normative values. SUMMARY OF BACKGROUND DATA: ...
Yom-Tov E - - 1999
We present a case study of involuntary motion in one part of the body induced by a voluntary motion in another part. The case investigated was that of a steady-state motion of the fingers at various frequencies, which induced a similar kind of motion in the legs. These phenomena were ...
Marrs H - - 1999
In this study, the wear of ultra high molecular weight polyethylene (UHMWPE) (Grade RCH 1000) crosslinked by gamma irradiation in acetylene was compared to virgin (non-irradiated) UHMWPE using four different wear configurations: (i) unidirectional motion with a smooth counterface, (ii) multidirectional motion with a smooth counterface, (iii) unidirectional motion with ...
Cornwall M W - - 1999
The purpose of this study was to investigate whether the amount of ankle passive dorsiflexion range of motion influences the pattern of frontal plane rearfoot motion during walking. Three-dimensional motion of the rearfoot was measured in two groups of subjects, those with ankle passive dorsiflexion range of motion less than ...
Ross G - - 1999
The results of treatment after closed reduction of elbow dislocation vary. Twenty consecutive patients with closed posterior elbow dislocations were treated prospectively on a rapid motion, nonimmobilized functional regimen. This treatment protocol emphasizes immediate active range of motion under close supervision. No slings or splints were employed. Final range of ...
Kellerman K A - - 1999
To examine the mechanisms of cell locomotion within a three-dimensional (3-D) cell mass, we have undertaken a systematic 3-D analysis of individual cell movements in the Dictyostelium mound, the first 3-D structure to form during development of the fruiting body. We used time-lapse deconvolution microscopy to examine two strains whose ...
Mussa R - - 1999
This article reports on the development and testing of a continuous passive motion device suitable for experimental animals and on the effect of 1 week of continuous passive motion on the thickness of the condylar cartilage in adult guinea pigs. Continuous passive motion is currently used for postsurgical joint therapy ...
Sugawara Eisuke - - 1999
This study examined wrist motions of instrumentalists who have never experienced a cumulative traumatic disorder. Eighteen student musicians ranging from 18 to 29 years of age, with more than 9 years of playing experience participated in this study using the WristSystem (Greenleaf Medical System). The wrist motions were measured while ...
Ishikawa J - - 1999
Changes in carpal kinematics under wrist distraction were studied in fresh cadaveric specimens. A magnetic tracking device measured kinematic motions of the scaphoid, lunate, and third metacarpal relative to the fixed radius in 3 planes of passive motion (coronal, sagittal, and "dart throwers") under progressive distraction loads. The change in ...
Andrew E R - - 1998
An investigation of the molecular dynamics of all-trans retinoic acid (vitamin A) has been carried out in the solid state by proton NMR. Measurements were made of T1 at 14 and 25 MHz and of second moment at 25 MHz in the temperature range 55 to 420 K for both ...
Scifert C F - - 1998
A previously validated three-dimensional finite element model was used to study how several total hip component design and surgical placement variables contribute to resisting the propensity for posterior dislocation in the case of leg crossing in an erectly seated position. The computational formulation incorporated treatments of polyethylene material nonlinearity and ...
Yim A P - - 1998
Paradoxical motion during videoendoscopic operations is generated when the camera and instruments are on opposite sides of the targeted pathology. This is occasionally difficult to avoid when operating on a wide field. We have found that turning the camera 180 degrees restores the normal spatial relationship. This simple maneuver allows ...
Svrcek-Seiler W A - - 1998
Brownian motion of the hairs (stereocilia) of amphibian hair cells has been shown in experiments to be in the range of some nm. Our models of the Brownian motion of coupled harmonic oscillators with mechanical properties of stereocilia lead to similar displacements. Computer simulation shows that stochastic fluctuations enhance the ...
Mark Gerstein,Ronald Jansen,Ted Johnson,Jerry ...
We describe database approaches taken in our lab to the study of protein and nucleic acid motions. We have developed a database of macromolecular motions, which is accessible on the World Wide Web with an entry point at http://bioinfo.mbb.yale.edu/MolMovDB. This attempts to systematize all instances of macromolecular movement for which ...
Romeo A A - - 1998
Motion between the humerus and scapula commonly is described as glenohumeral motion. However, humeroscapular motion occurs at two distinct sites. In addition to the motion at the diarthrodial glenohumeral joint, movement occurs between the proximal humerus and related structures and the surrounding sleeve of structures, including the acromion, deltoid, coracoid, ...
Ring D - - 1998
To determine whether a postoperative rehabilitation protocol incorporating continuous passive motion would increase the total range of motion obtained 6 months following silicone interposition arthroplasty of the metacarpophalangeal joints in patients with rheumatoid arthritis, a prospective trial randomizing patients to receive either continuous passive motion or the standard dynamic splint ...
Witt P D PD Department of Surgery, Cleft Palate Craniofacial Deformities Institute, St. Louis Children's Hospital, Washington University School of Medicine, MO 63110, - - 1998
Lateral speech videofluoroscopic evaluations were videotaped preoperatively and postoperatively for 20 patients who underwent sphincter pharyngoplasty. Randomized videotapes were constructed and subsequently evaluated by speech/language pathologists experienced in assessing patients with velopharyngeal dysfunction. Rating forms assessing various motion parameters of the posterior pharyngeal wall were completed and analyzed statistically. Results ...
Draper D O - - 1998
OBJECTIVE: With respect to increasing ankle dorsiflexion range of motion, our objective was to examine the influence, if any, of preheating the triceps surae with ultrasound before stretching. DESIGN AND SETTING: Subjects were assigned to either group A (ultrasound and stretch) or group B (stretch alone). Group A received 3-MHz ...
Chiu H Y - - 1998
The reliability of the motion analysis system and the normal value of the fingertip motion area have been studied in young adults. The results indicate that the motion analysis system is a reliable tool for the evaluation of fingertip motion. It was found that the fingertip motion area in young ...
Zhadin M N - - 1998
This is an attempt to solve the energetic problem of the primary detection of weak parallel static (DC) and alternating (AC) extremely low frequency (ELF) magnetic fields. We studied the equations of motion for an ion situated inside a macromolecule under the influence of these fields. The main concern is ...
Kawakami M - - 1998
The aim of this paper is to explore and present a proposal for redesigning elements of the workplace for aged workers. The method of research was to observe, record, and measure the actions of sitting workers performing assembly operations on electrical products in the Kani Plant Nagoya Works of Mitsubishi ...
Werner F W - - 1997
The relative contribution of the scaphoid, lunate, triquetrum, and capitate to wrist motion was examined in 6 fresh cadaver forearms. A wrist-joint motion simulator was used to dynamically move each wrist through planar and nonplanar motions. During wrist flexion-extension, the motion of the capitate closely followed the motion of the ...
Katsuda T - - 1997
To determine the types and causes of diaphragmatic motion during hepatic angiography, the authors used transarterial cut-film portography (TAP) to study movement of the diaphragm during breath-holding. Thirty-three TAP sequences were studied, and the patients' diaphragmatic motions were classified into four categories according to the distance their diaphragms moved. Results ...
Lewis C H - - 1997
The motions of a semi-submersible drilling platform have been evaluated so as to predict the effects on the comfort and activities of the crew. The horizontal motions at the drill floor exceeded the 'average threshold of perception' defined in International Standard 6897 (ISO 6897, 1984) by more than a factor ...
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