The role of unit evaluation, learning and culture dimensions related to student cognitive style in hypermedia learning

Recent developments in learning technologies such as hypermedia are\ud becoming widespread and offer significant contributions to improving the delivery\ud of learning and teaching materials. A key factor in the development of hypermedia\ud learning systems is cognitive style (CS) as it relates to users‟ information\ud processing habits, representing individual users‟ typical modes of perceiving,\ud thinking, remembering and problem solving.\ud \ud \ud \ud \ud A total of 97 students from Australian (45) and Malaysian (52) universities\ud participated in a survey. Five types of predictor variables were investigated with\ud the CS: (i) three learning dimensions; (ii) five culture dimensions; (iii) evaluation\ud of units; (iv) demographics of students; and (v) country in which students studied.\ud Both multiple regression models and tree-based regression were used to analyse\ud the direct effect of the five types of predictor variables, and the interactions within\ud each type of predictor variable. When comparing both models, tree-based\ud regression outperformed the generalized linear model in this study. The research\ud findings indicate that unit evaluation is the primary variable to determine students‟\ud CS. A secondary variable is learning dimension and, among the three dimensions,\ud only nonlinear learning and learner control dimensions have an effect on students‟\ud CS. The last variable is culture and, among the five culture dimensions, only\ud power distance, long term orientation, and individualism have effects on students‟\ud CS. Neither demographics nor country have an effect on students‟ CS.\ud These overall findings suggest that traditional unit evaluation, students‟\ud preference for learning dimensions (such as linear vs non-linear), level of learner\ud control and culture orientation must be taken into consideration in order to enrich\ud students‟ quality of education. This enrichment includes motivating students to\ud acquire subject matter through individualized instruction when designing,\ud developing and delivering educational resources

Studying Some Electrical and Mechanical Properties of Epoxy- Polyaniline (PANI) Composites

As ordinary known the ability of synthesizing electrical conducting polymercomposite is possible but with poor mechanical properties, for the solution of thisproblem, we carried out this study in order to obtain both properties.The PANI composite was prepared by using the prepared (EP/glass fiber)composite as substrate for the deposition of the PANI. The chemical oxidativemethod was adopted for polymerization of the aniline and simultaneouslyprotonated of PANI with a hydrochloric acid at a concentration of (1M).Theoxidation agent (FeCl3.6H2O) was used. The conductivity results showed that theprepared composite lies within semiconductors region (1.7×10-3(S.cm-1)). TheHall Effect measurement showed a p-type behavior for the prepared composite.The creep and tensile behavior was studied and concluded that PANI Precipatedon the EP/glass fiber composite has no remarkable effect on the mechanical creepand tensile behavior as compared with the untreated composites with PANI.Buthave higher creep resistance and ultimate strength

Muzičke stimulacije u rehabilitaciji sluha i govora po verbotonalnoj metodi

Rad započinje prikazom općenito osjetila sluha i mogućih oštećenja osjetila sluha, a zatim drugi dio nudi historijski pregled rješavanja problema ispitivanja sluha. Središnji dio rada prezentira verbotonalnu metodu i njezinu primjenu na rehabilitaciju sluha, tehnička pomagala verbotonalne metode i načine stimulacije u verbotonalnom sistemu. Posljednji dio rada se osvrće na pitanja odnosa ritma i govora, te muzičke stimulacije osjetila sluha

Muzičke stimulacije u rehabilitaciji sluha i govora po verbotonalnoj metodi

Rad započinje prikazom općenito osjetila sluha i mogućih oštećenja osjetila sluha, a zatim drugi dio nudi historijski pregled rješavanja problema ispitivanja sluha. Središnji dio rada prezentira verbotonalnu metodu i njezinu primjenu na rehabilitaciju sluha, tehnička pomagala verbotonalne metode i načine stimulacije u verbotonalnom sistemu. Posljednji dio rada se osvrće na pitanja odnosa ritma i govora, te muzičke stimulacije osjetila sluha

Muzičke stimulacije u rehabilitaciji sluha i govora po verbotonalnoj metodi

Rad započinje prikazom općenito osjetila sluha i mogućih oštećenja osjetila sluha, a zatim drugi dio nudi historijski pregled rješavanja problema ispitivanja sluha. Središnji dio rada prezentira verbotonalnu metodu i njezinu primjenu na rehabilitaciju sluha, tehnička pomagala verbotonalne metode i načine stimulacije u verbotonalnom sistemu. Posljednji dio rada se osvrće na pitanja odnosa ritma i govora, te muzičke stimulacije osjetila sluha

pp60src-mediated phosphorylation of connexin43, a gap junction protein

Thesis (Ph. D.)--University of Hawaii at Manoa, 1995.Includes bibliographical references (leaves 76-93).Microfiche.vii, 93 leaves, bound ill. (some col.) 29 cmSeveral laboratories have demonstrated a decrease in gap junctional communication in cells transformed by the src oncogene of the Rous sarcoma virus. The decrease In gap junctional communication was associated with tyrosine phosphorylation of the gap junction protein, connexin43 (Cx43). This study was initiated to determine if the phosphorylation of Cx43 is the result of a direct kinase-substrate interaction between the highly active tyrosine kinase, pp60v-src, and Cx43. Confocal microscopy data indicates that the two proteins are within physical proximity allowing for a potential kinase-substrate interaction. Previous biochemical studies have been limited by the low levels of Cx43 protein in fibroblast cell lines. To obtain larger quantities of Cx43 we constructed a recombinant baculovirus expressing Cx43 in Spodoptera frugiperda (Sf-9) cells and subsequently purified the expressed Cx43 by immunoaffinity chromatography. We observed that this partially-purified Cx43 was phosphorylated on tyrosine in vitro in the presence of kinase-active pp60src. Phosphotryptic peptide mapping indicated that the in vitro phosphorylated Cx43 contained phosphopeptides which comigrated with a subset of tryptic peptides prepared from Cx43 phosphorylated in vivo. This phosphorylation event occurred in the COOH-tail region of the Cx43 molecule because pp60src phosphorylated a GST-fusion protein containing the COOH-tail region of Cx43 and the phosphotryptic peptides generated using this construct comigrated with the subset mentioned above. Furthermore, coinfection of Sf-9 cells with recombinant baculoviruses encoding pp60v-src and Cx43 resulted in the accumulation of phosphotyrosine in Cx43. Taken together, the evidence presented in this dissertation demonstrates that kinase active pp60src is capable of phosphorylating Cx43 In a direct manner. Since the presence of phosphotyrosine on Cx43 is correlated with the down regulation of gap-junctional communication, these results suggest that pp60v-src regulates gap junctional gating activity via tyrosine phosphorylation of Cx43