4,560 research outputs found
A Deformable Model for Magnetic Vortex Pinning
Get PDFA two-parameter analytical model of the magnetic vortex in a thin disk of
soft magnetic material is constructed. The model is capable of describing the
change in evolution of net vortex state magnetization and of core position when
the vortex core interacts with a magnetic pinning site. The model employs a
piecewise, physically continuous, magnetization distribution obtained by the
merger of two extensively used one-parameter analytical models of the vortex
state in a disk. Through comparison to numerical simulations of ideal disks
with and without pinning sites, the model is found to accurately predict the
magnetization, vortex position, hysteretic transitions, and 2-D displacement of
the vortex in the presence of pinning sites. The model will be applicable to
the quantitative determination of vortex pinning energies from measurements of
magnetization.Comment: 27 pages, 7 figures, including supplementary information, ancillary
files:3 supplementary movie
Evaluation of Upper Extremity Movement Characteristics during Standardized Pediatric Functional Assessment with a Kinect®-based Markerless Motion Analysis System
Get PDFA recently developed and evaluated upper extremity (UE) markerless motion analysis system based on the Microsoft® Kinect® has potential for improving functional assessment of patients with hemiplegic cerebral palsy. 12 typically-developing adolescents ages 12-17 were evaluated using both the Kinect-based system and the Shriners Hospitals for Children Upper Extremity Evaluation (SHUEE), a validated measure of UE motion. The study established population means of UE kinematic parameters for each activity. Statistical correlation analysis was used to identify key kinematic metrics used to develop automatic scoring algorithms. The Kinect motion analysis platform is technically sound and can be applied to standardized task-based UE evaluation while providing enhanced sensitivity in clinical analysis and automation through scoring algorithms
Thermo-mechanical sensitivity calibration of nanotorsional magnetometers
Full text linkWe report on the fabrication of sensitive nanotorsional resonators, which can
be utilized as magnetometers for investigating the magnetization dynamics in
small magnetic elements. The thermo-mechanical noise is calibrated with the
resonator displacement in order to determine the ultimate mechanical torque
sensitivity of the magnetometer.Comment: 56th Annual Conference on Magnetism and Magnetic Material
Information Technology Innovation and Organizational Policy: Implications on Employee Privacy
Get PDFIssues relating to workplace privacy and how organizations address privacy have sparked a lot of public debate in recent years. Research reveals that potential employers have exploited employees seeking job opportunities by asking information to do with: disclosure of confidential information about the past employer’s work, financial background, and family intimate issues not relevant to the job being sought among others. This paper establishes the implications of information technology innovation on organization policies with emphasis on employees’ privacy. The study was done in two organizations and it adapted a case study approach. Data was collected from 74 respondents using questionnaires. Respondents were sampled using purposive technique. Frequency distribution tables were used in data presentation followed by discussions. The findings of this study are critical in informing the policy makers in organizations on procedures and strategies of inclusive policy formulation and implementation as well as provide HR managers with insight on managing privacy issues in dynamic organizational setups. Key words: Employees’ Privacy policy, Information Technology, Surveillanc
Research Paradigms: Theory and Practice
Get PDFThis paper reflects on the ontological, epistemological and methodological underpinnings of the two major research approaches i.e the quantitative and the qualitative approaches. Their differences, occasioned by these philosophical foundations are discussed and practical implications examined. It is our view that this paper will have positive impact on the work of researchers and students undertaking courses in research studies. Key words: Research paradigms, ontology, epistemology, methodology, quantitative, qualitativ
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