Instructional Technology and Self -Directed Learning: An Analysis of the Relationship Between Online Students' Self -Directed Learning Ability and Instructional Technology Competency

166 p.Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2006.The results of the study also suggest possible variations in the learning strategies that students with different levels of SDL ability applied for learning IT in an online course. Cognitive learning strategies of metacognitive self-regulation, elaboration, and critical thinking appear as substantial factors in learning IT for students with SDL ability above the average. For students with SDL ability below the average, strategies of peer learning, rehearsal, and help seeking appear as more important factors in learning IT than the cognitive strategies.U of I OnlyRestricted to the U of I community idenfinitely during batch ingest of legacy ETD

Information technology in financial sector Russian Federation - driver of the formation of the Russian economy

The digital changes taking place in all areas of society are most evident in certain sectors, especially in financial sector. One of the drivers of the modern development of a sustainable economy is the digitalization of society associated with the rapid development of information technologies. Informatization of this sector in Russia is associated with the synthesis of changes in the legal, economic, social, political nature. The article is devoted to key trends in the informatization of the financial sector of Russia. Analysis of the main suppliers of information technologies in the financial sphere and their products was made. Priority directions of development of information technologies in the financial sector and ways of their implementation are identified. The main approaches to strengthening information security and reliability of financial technologies in Russia have been studied. Synthesis of materials on information technologies researches in the financial sector of Russia was carried out

Investigation of heavy metals distribution in suspended matter and macrophytes of the Selenga river delta using airborne hyperspectral remote sensing

The Leman-Baikal project is an international Swiss-Russian research initiative in the fields of physical limnology, geochemistry and hydrology of aquatic geosystems. The main methodological principle of the project is constituted by simultaneous collection of airborne wide-area Hyperspectral Imaging (HSI) and ground point-based data. In this study we used supervised classification of hyperspectral images to interpret three types of aquatic species: small yellow pond lily, reed and pondweeds with watermilfoil. For turbidity mapping we used mosaic hyperspectral image (band 534 nm) to derive Total Suspended Matter (TSM). A good level of correlation between reflectance values and TSM concentrations were observed

Improved Mechanical Properties of Biocompatible Zn-1.7%Mg and Zn1.7%Mg-0.2%Zr Alloys Deformed with High-Pressure Torsion

The potential medical Zn-1.7%Mg and Zn-1.7%Mg-0.2%Zr alloys strengthened using high-pressure torsion (HPT) were investigated in this work. HPT led to a significant refinement of the microstructure of both alloys with the formation of an ultrafine-grained structure (UFG). The average grain size after HPT was ~700–800 nm for both alloys. The formation of the UFG structure led to an increase in the ultimate tensile strength of up to 401 ± 16 and 482 ± 12 MPa for the Zn-1.7%Mg and Zn-1.7%Mg-0.2%Zr alloys, respectively. Additionally, a variation in ductility of the Zn-1.7%Mg and Zn-1.7%Mg-0.2%Zr alloys of up to 56.3 ± 16.9% and 4.4 ± 0.6%, respectively, was also observed, apparently due to textural changes. HPT led to a small increase in the degradation rate of the alloys after 1 day of incubation in the medium. However, an increase in the incubation period of up to 30 days slowed down the degradation process and leveled the difference between the initial and HPT-treated state of the alloys. HPT did not affect the cytotoxicity of the Zn-1.7%Mg-0.2%Zr alloy and contributed to the reduction of hemolysis. Thus, the processing of the Zn-1.7%Mg and Zn-1.7%Mg-0.2%Zr alloys using HPT accelerated their biodegradation without compromising their biocompatibility

Bioactivity Features of a Zn-1%Mg-0.1%Dy Alloy Strengthened by Equal-Channel Angular Pressing

The structure, phase composition, corrosion and mechanical properties, as well as aspects of biocompatibility in vitro and in vivo, of a Zn-1%Mg-0.1%Dy alloy after equal-channel angular pressing (ECAP) were studied. The structure refinement after ECAP leads to the formation of elongated α-Zn grains with a width of ~10 µm and of Mg- and Dy-containing phases. In addition, X-ray diffraction analysis demonstrated that ECAP resulted in the formation of the basal texture in the alloy. These changes in the microstructure and texture lead to an increase in ultimate tensile strength up to 262 ± 7 MPa and ductility up to 5.7 ± 0.2%. ECAP slows down the degradation process, apparently due to the formation of a more homogeneous microstructure. It was found that the alloy degradation rate in vivo after subcutaneous implantation in mice is significantly lower than in vitro ones. ECAP does not impair biocompatibility in vitro and in vivo of the Zn-1%Mg-0.1%Dy alloy. No signs of suppuration, allergic reactions, the formation of visible seals or skin ulcerations were observed after implantation of the alloy. This may indicate the absence of an acute reaction of the animal body to the Zn-1%Mg-0.1%Dy alloy in both states

Effect of Rotary Swaging on Mechanical and Operational Properties of Zn–1%Mg and Zn–1%Mg–0.1%Ca Alloys

A study of microstructure, phase composition, mechanical properties, corrosion processes, and biocompatibility in vitro of the Zn–1%Mg and Zn–1%Mg–0.1%Ca alloys in an annealed state and after rotary swaging (RS) is presented. Partially recrystallized microstructure is formed in the studied alloys after RS at 200 °C. RS reduces the mass fraction of intermetallic phases in comparison with annealed states of the alloys. RS at 200 °C increases the strength of the Zn–1%Mg and Zn–1%Mg–0.1%Ca alloys up to 248 ± 9 and 249 ± 9 with the growth of ductility up to 10.3 ± 3% and 14.2 ± 0.9%, respectively. The structure after RS at 200 °C does not lead to a change in the corrosion resistance of the studied alloys. However, an increase in the incubation period of the alloys in a growth medium slows down the degradation process due to the formation of a film consisting of degradation products. Rotary swaging does not impair the biocompatibility of the Zn–1%Mg and Zn–1%Mg alloys, maintaining the viability and integrity of blood cells, preventing hemolysis, and ensuring the adhesion and proliferation of osteogenic cells on the surface of samples