High Temperature Ferromagnetism with Giant Magnetic Moment in Transparent Co-doped SnO2-d

Occurrence of room temperature ferromagnetism is demonstrated in pulsed laser deposited thin films of Sn1-xCoxO2-d (x<0.3). Interestingly, films of Sn0.95Co0.05O2-d grown on R-plane sapphire not only exhibit ferromagnetism with a Curie temperature close to 650 K, but also a giant magnetic moment of about 7 Bohr-Magneton/Co, not yet reported in any diluted magnetic semiconductor system. The films are semiconducting and optically highly transparent.Comment: 12 pages, 4 figure

Enhanced effective mass in doped SrTiO3 and related perovskites

The effective mass is one of the main factors determining the Seebeck coefficient and electronic conductivity. Nb-doping increases the effective mass because of two reasons, lattice constants increase and electronic effects. In this ab-initio study the effective mass is estimated from the curvature of electronic bands and it could be clarified that the deformation of SrTiO3 crystals has a significant influence on bandgap and effective DOS and band mass, which are both in excellent agreement to experimental data. However, the electronic effect due to the e2g- band flattening near the Gamma-point due to Nb-doping up to 0.2 at% is the main factor for the increase of effective mass. Doping of La shows a linear decrease of the effective mass; this is explained by the different surrounding of A- and B-site. Substitution of other elements like Ba on the A-site and V on the B-site in SrTiO3 were also found to increase the effective mass.Comment: 10 pages, 11 figures, 3 table

The influence of surface reinforcement on concrete failure under shear loading

Recently, construction costs have been at a global high – paired with increased global demand, rise in cost of material and limited skilled labor – it has become of utmost paramount to determine the solutions in the Civil Engineering industry to accommodate these changes and relieve these costs. Fastening to concrete has been important part of the construction industry for many years. Several standards have adopted a form of determining the strength of concrete breakout such as: ACI 318, ACI 349, or European code “Design of Fastenings in Concrete.” Many of these codes still reference testing and use equations that were developed in the early 1990’s. As technology in construction moves forward, so must the codes we use to design these new structures. Therefore, this study will evaluate whether the code is too conservative and can be expanded upon. Through the use of an FEA program, the effectiveness of shear anchor reinforcement is investigated. The load-bearing capacity is currently limited to three specific conditions: 1) No reinforcement present, 2) Edge reinforcement present, and 3) Edge reinforcement and stirrups spaced at 4in max. There are significant gaps in between these situations. Expanding condition 3) to include larger spacing would greatly benefit designers and laborers. Finite Element Analysis models will be run with 4 in, 6 in, and 8 in spacing between shear reinforcement stirrups. Peak loads will be extracted from each data and analyzed. Based on comparisons with the results, FE and calculations, recommendations are provided on the modification of existing code equations to expand to more conditions

Ferromagnetism in laser deposited anatase Ti1−x_{1-x}Cox_{x}O_{2-\delta} films

Pulsed laser deposited films of Co doped anatase TiO2 are examined for Co substitutionality, ferromagnetism, transport, magnetotransport and optical properties. Our results show limited solubility (up to ~ 2 %) of Co in the as-grown films and formation of Co clusters thereafter. For Ti0.93Co0.07O2-d sample, which exhibits a Curie temperature (Tc) over 1180 K, we find the presence of 20-50 nm Co clusters as well as a small concentration of Co incorporated into the remaining matrix. After being subjected to the high temperature anneal during the first magnetization measurement, the very same sample shows a Tc ~ 650 K and almost full matrix incorporation of Co. This Tc is close to that of as-grown Ti0.99Co0.01O2-d sample (~ 700 K). The transport, magnetotransport and optical studies also reveal interesting effects of the matrix incorporation of Co. These results are indicative of an intrinsic Ti1-xCoxO2-d diluted magnetic semiconductor with Tc of about 650-700 K.Comment: 14 pages + 9 figure

女性のエンパワーメントにおける男性の役割-ジェンダーへの取組みがゼロ・サム・ゲームでないことを示唆するインドネシアの事例-

早大学位記番号:新7620早稲田大

A Mobile Application Framework to Classify Philippine Currency Images to Audio Labels Using Deep Learning

This research presents a mobile application framework designed to empower visually impaired individuals in Legazpi City by providing real-time audio feedback for currency identification. Leveraging deep learning techniques, the proposed framework employs a robust model trained on a comprehensive dataset of Philippine currency images. The deep learning model is capable of accurately classifying various denominations of bills and coins, enabling the development of an inclusive solution for the visually impaired community. The researcher employed a qualitative approach in this study, which included a focus group discussion. Respondents were chosen using purposive sampling. Among those who responded were masseuses, chiropractors, herbal street vendors, and students. Through an online meeting, the selected participants contributed to the focus group discussion. In addition, an in-depth informal interview was conducted to gather additional information for the development of an architectural framework. Based on the result of this study, it was discovered that by implementing this architectural framework, these groups would be able to more easily identify money, increasing efficiency and reducing errors in cash transactions. The use of audio labels is particularly helpful for visually impaired individuals, as it provides an accessible way for them to independently handle and identify money

A Multiscale Observational Case Study of the Development of an Isolated High Plains Tornadic Supercell

On 21 May 1995, a strong tornado developed with an isolated supercell in southwestern Nebraska. Largescale conditions were not supportive of a tornadic thunderstorm outbreak; however, evidence suggests significant mesoscale enhancements produced a local environment favorable for strong tornado formation. This case study illustrates the importance of ‘‘situation awareness’’ and illustrates how mesoscale enhancements must be anticipated by forecasters in order to properly assess rapidly changing atmospheric conditions