Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 161 for “"retraction"”.
-
Clot retraction
… with regard to the mechanism or purpose of clot retraction; the factors controlling it are to a large-extent unknown, and even the fundamental question of the part played by the platelets is undecided.
-
Temporary tissue retraction before taking impression. A multi-center randomized controlled clinical trial comparing the use of retraction cord, aluminum chloride paste (Expasyl®) and combination of aluminum chloride paste and retraction cord
… the method of choice has been placing a cotton retraction cord into the gingival sulcus to make space for the impression material. In 2000, a new material, aluminium chloride paste (Expasyl®), was introduced, which was supposed to play the same role as the retraction cord. Until now, this paste …
-
Tongue Retraction in Arabic: An Ultrasound and Acoustic Study
… thesis deals with the phonetic aspects of tongue retraction in Arabic emphatics compared to those of the pharyngeals and uvulars. The study uses ultrasound imaging of the tongue coupled with the first three formants to investigate the articulation of Arabic emphatics, pharyngeals and uvulars in …
-
Flexible support scaffold for organ retraction in laparoscopic surgery
… abdominal wall serving as a platform for organ retraction. While the previously fabricated device functions as intended, it's rigid shape does not match the shape of the ventral abdominal wall, and as such, the device occupies unnecessary operating space. The work of this paper involves the …
-
Bat Inspired Lifesize Ornithopter with Passive Lateral Wing Retraction
… has two motors that actuate wing flapping, wing retraction, and rotation of the hind legs. With this simplified design, the operator can remotely control VALKRIE by increasing and decreasing the wingbeat frequency and steering to the right and left with the hind legs.
-
Comparing Shoulder Manual Muscle Testing With Scapular Retraction And Core Activation
… greater force generation than scapular retraction for the dominant arm (14.7±4.7kg) and non-dominant arm (15.0±5.0kg, p≤0.045). For the female subjects, abduction in relative posture (13.8±2.8kg) resulted in significantly greater force generation compared to the scapula retracted …
-
Design and development of an epidural needle puncture and retraction device
Over 2 million epidural procedures are performed every year in the United States, but many result in complications caused by over puncture, where the needle punctures farther than the epidural space. A usable model of a previously developed flexure-based solution was made and utilized in designing …
-
A new application of thermal active nickel titanium alloys: Canine retraction springs.
… of thermal active nickel titanium alloys: Canine retraction springs.
-
Biophysical Model of Retraction Motor Neurons and Their Modification by Operant Conditioning
… tongue-like structure (i.e., radula) during the retraction phase of the BMP (Susswein and Byrne, 1988). Recent studies show that OC leads to increased intrinsic excitability in the major retraction motor neurons B6 and B9, while no significant changes were observed in B3 neurons. Using …
-
Understanding mechanical environment changes and biological responses to canine retraction using T-loop
… Changes and Biological Responses to Canine Retraction Using T-loop. Major Professors: Jie Chen, School of Engineering and Technology, Anil Bajaj, School of Mechanical Engineering. Predictability of tooth displacement in response to specific orthodontic load system directly links to the …
-
Quantitative analysis of anisotropic edge retraction during solid-state dewetting of thin single crystal films
… Therefore, a quantitative understanding of the retraction of kinetically stable edges can serve as the basis for understanding the retraction of edges with all other orientations. Measurements of the rates of retraction of kinetically stable edges for single crystal (100) and (110) Ni films on …
-
Duane's retraction syndrome in a cohort of South African children a 20 year clinic based review
… To describe the clinical features of Duane’s retraction syndrome in a cohort of South African children and analyse subtypes for ethnic differences. METHODS: Retrospective case series of 120 patients seen in the period from 1997 to 2017 at the Red Cross War Memorial Children’s Hospital. …
-
Blind transmembrane puncture access : design and development of a novel laparoscopic trocar and blade retraction mechanism
Blind puncture access procedures are frequent in medicine but can lead to complications due to over-puncture. When tissue membranes yield under applied stress, the device suddenly accelerates forward into the patient. Clinical background for puncture access procedures and specifically trocar …
-
Three-Dimensional Evaluation of the Effect of Maxillary Incisor Retraction on the Palatal Bone and Root Resorption
<p> <p><strong>Introduction:</strong> The objective of this study was to compare pre-treatment and post-treatment cone-beam computed tomography images of patients to quantitatively evaluate the effect of orthodontically retracting maxillary incisors on the height and labiolingual thickness of …
-
Chlorpyrifos and chlorpyrifos oxon induce neurite retraction and cytoskeletal disruption in mouse N2a cells and human neural progenitor stem cells
… was known about their ability to cause neurite retraction. The main aims of this study were to investigate the effects of CPF and CPO on the stability of neurites in pre-differentiated mouse N2a neuroblastoma and human ReNcell CX neural stem cells, and to relate toxicity to the regulation of …
-
Glutamate regulates neurite outgrowth of descending neurons in culture from larval lamprey
… to neurons elicited neurite inhibition and often retraction, which was abolished by kynurenic acid. Glutamate-induced neurite retraction appeared to be due, in part, to calcium influx via voltage-gated calcium channels, since application of high potassium media inhibited neurite outgrowth, an …
-
Characterization of a pre-curved needle for use in distal tip manipulation mechanism
… cannulas, and (3) calculate the deployment and retraction forces required for moving the stylet relative to the cannula. Sixteen Nitinol stylets were prototyped and experiments were performed with four different diameter cannulas and an experimental setup and methodology was developed to measure …
-
Essays on learning and strategy in research and development
… first essay, I study the impact of scientific retractions on citation patterns and funding in the retracted paper's intellectual field. I investigate how the retraction disclosure and affected field's characteristics influence the extent of these spillover effects. The second essay evaluates …
-
Regulation of integrin-mediated linkages during cell migration
… integrin-cytoskeletal linkages fracture and rear retraction occurs by extraction of ligand-bound integrin from the cell membrane. At high adhesiveness cellsubstratum detachment is the rate-limiting step in cell migration speed while at low adhesiveness other factors, such as the formation of new …
Page 1 of 9