München, Techn. Univ., Diss., 2001.

München, Techn. Universiẗat, Diss., 2001.

The influence of finger-counting strategies (pointing, keep track, montring) on number representations is supported by several empirical facts. However, even the above mentioned strategies have been object of studies during childhood, little is known about how finger-counting could interact with the semantic representation of numbers in adulthood. To address this issue, we conducted a first experiment in which participants had to identify Arabic digits by pressing the keyboard with one between their ten fingers. Results showed that responses were faster and more accurate when the finger assigned to each digit was congruent with the finger-counting habits of the participants (Di Luca, Granà, Semenza, Seron and Pesenti, 2006). Subsequently, in a numerosity detection task, we showed that the numerosities expressed by canonical configurations are named faster than those expressed by non-canonical ones, even when no motors responses were needed (Di Luca and Pesenti, in press). Moreover, when used as unconsciously presented primes, both types of configurations speeded up comparative judgments of Arabic digits, but only the priming effect induced by canonical configurations generalized to new, never consciously seen, numerosities, which implies an automatic semantic access for these one only. Finally, we showed that these differences cannot be ascribed to simple visual features, but they stem from two distinct semantic processes. Specifically, canonical configurations are processed as a symbolic system and activate a place coding semantic representation of magnitude, whereas non-canonical configurations activate a summation coding semantic representation.

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Degree of Master of Medicine in Orthopaedic surgery Department of Orthopaedics Faculty of Health Sciences University of Witwatersrand / The hand is an intricate and important body appendage which plays a vital role in our activities of daily living. Flexor tendon injuries to the hand make up a large amount of patients seen at hospitals all over the world. Hand injuries are quite common and contribute to approximately 28% of injuries to the human body. A prospective study was conducted, with patients who had sustained flexor tendon hand injuries. The patients who presented to Chris Hani Baragwanath Academic Hospital from 02 March 2015 to 29 July 2015 were included in the study. The aim of this study was to document and identify the causes (mechanism of injury) and demographic details of patients presenting with flexor tendon injuries at Chris Hani Baragwanath Academic Hospital hands unit. There were 96 patients in the study, with 80 being right hand dominant and 16 being left hand dominant. Zones II and zones III were the most common flexor zones affected (27 each). There was also a significant amount of zone V injuries (23). Zone IV was the least common zone affected (5). The results also showed that the most common injury to flexor tendons of the hands occurred in young adult males, the majority of whom were unemployed. This disproves our hypothesis, as it was hypothesised that most injuries would occur in the work place. This study was undertaken in an attempt to reduce the incidence and frequency of hand injuries in our community, by assessing the common causes and patient particulars of flexor tendon injuries. This information can now be used to teach awareness which now can be used in the work place. / MT2017

The influence of finger-counting strategies (pointing, keep track, montring) on number representations is supported by several empirical facts. However, even the above mentioned strategies have been object of studies during childhood, little is known about how finger-counting could interact with the semantic representation of numbers in adulthood. To address this issue, we conducted a first experiment in which participants had to identify Arabic digits by pressing the keyboard with one between their ten fingers. Results showed that responses were faster and more accurate when the finger assigned to each digit was congruent with the finger-counting habits of the participants (Di Luca, Granà, Semenza, Seron and Pesenti, 2006). Subsequently, in a numerosity detection task, we showed that the numerosities expressed by canonical configurations are named faster than those expressed by non-canonical ones, even when no motors responses were needed (Di Luca and Pesenti, in press). Moreover, when used as unconsciously presented primes, both types of configurations speeded up comparative judgments of Arabic digits, but only the priming effect induced by canonical configurations generalized to new, never consciously seen, numerosities, which implies an automatic semantic access for these one only. Finally, we showed that these differences cannot be ascribed to simple visual features, but they stem from two distinct semantic processes. Specifically, canonical configurations are processed as a symbolic system and activate a place coding semantic representation of magnitude, whereas non-canonical configurations activate a summation coding semantic representation.

The treble clef binding motif of the zinc finger metalloprotein utilizes N2S2 binding sites. Whereas other N2S2 metalloproteins function in catalytic roles, zinc fingers serve mostly a structural element, although there has been some evidence that the zinc finger protein can interact with exogenous metal ions in aggregate formation or ion exchange. The work presented within has been aimed at precedents for both of the latter in Zn2+. The use of zinc and cadmium dithiolate complexes as mono- and bidentate S-donor ligands to tungsten carbonyl complexes was explored and the ability of zinc and cadmium complexes to stably bind to W(CO)x (x = 4 and 5) was established. The reactivity of thiolate sulfurs within the bimetallic complexes was examined, gaining an understanding of zinc and cadmium N2S2. The characteristics of these complexes were examined via IR, UV-vis, elemental analysis, and x-ray crystallography spectroscopy. The ability of zinc to act as a scaffold for the synthesis of bisacetylbme-dach in the production and subsequent transfer of the same ligand to exogenous metal ion sources was investigated. Cu2+ and Cd2+ analogs to the Zn-1’-Ac2 were synthesized and their properties investigated with IR, elemental analysis, and UV-vis spectroscopy.

There were two main aims of the project. A surface replacement prosthesis was previously designed at the University of Durham for the metacarpo-phalangeal joint (MCPJ). Tools were required to assess the joint prosthesis pre-operatively and postoperatively. The areas of assessment which the author was involved in were joint stiffness and a self-assessment questionnaire. The Durham arthrograph had previously been used for many clinical trials to assess joint stiffness objectively. However, the computer system was not portable. Hence a new computer system was developed, in Lab VIEW, for a lap-top computer. Ten normal individuals were assessed to validate the system. A questionnaire was also developed for patients to self-assess the performance of their joints. The questionnaire assessed parameters such as range of movement, hand strength, stiffness and pain on visual analogue scales. The difficulty in performing activities of daily living were assessed on simple descriptive scales. The second part of the project was to develop a surface replacement prosthesis for the proximal interphalangeal joint (PIPJ). Since there was inadequate information in the literature on the architecture of the PEPJ bearing surfaces and phalangeal bone shafts, a detailed study was performed on the bones from 83 PIPJs. Proximal and middle phalangeal bones were dissected, modelled in bone cement, sectioned and shadowgraphed. The shadowgraphs were measured and models of the proximal phalangeal heads were produced. These models were then used to design four PIPJ surface replacement prostheses over a range of sizes which covered 97.6% of the sample population of PIPJs. It was proposed that the MCPJ and PIPJ prostheses would be made entirely from cross-linked polyethylene (XLPE). Hence wear tests on pin-on-plate apparatuses were carried out to investigate the wear characteristics of XLPE-on-XLPE compared with other biomaterial combinations. The wear of XLPE-on-XLPE was comparable with UHMWPE-on-stainless steel. XLPE-on-stainless steel wore 10 times faster than XLPE-on-XLPE, and UHMWPE-on-UHMWPE wore 100 times faster than XLPE-on- XLPE. Hence it was concluded that all XLPE joint prostheses were feasible as far as the wear considerations were concerned.

Thesis (Ph. D.)--School of Biological Sciences. University of Missouri--Kansas City, 2008. / "A dissertation in cell biology and biophysics and molecular biology and biochemistry." Advisor: John H. Laity. Typescript. Vita. Title from "catalog record" of the print edition Description based on contents viewed Sept.12, 2008. Includes bibliographical references (leaves 148-166). Online version of the print edition.

Thesis (M.S.)--University of Michigan, 1948.