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Full-Text Articles in Engineering
Analyzing The Adoption Rate Of Local Variable Type Inference In Open-Source Java 10 Projects, Clayton Liddell, Donghoon Kim
Analyzing The Adoption Rate Of Local Variable Type Inference In Open-Source Java 10 Projects, Clayton Liddell, Donghoon Kim
Journal of the Arkansas Academy of Science
Type Inference is used in programming languages to improve writability. In this paper, we will be looking more specifically at Local Variable Type Inference (LVTI). For those unfamiliar with LVTI, we will also give an in-depth explanation of what it is and how it works. There is a lot of debate surrounding Type Inference in modern day programming languages. More specifically, whether the costs associated with LVTI outweigh the benefits. It has found its way into many higher-level languages including C#, C++, JavaScript, Swift, Kotlin, Rust, Go, etc. In this paper, we will look at the usefulness of LVTI and …
Interpolation Techniques For Overset Grids, Paul S. Sherman, Nathan B. Edgar
Interpolation Techniques For Overset Grids, Paul S. Sherman, Nathan B. Edgar
Journal of the Arkansas Academy of Science
The use of finite difference schemes in computational aeroacoustics requires the use of structured grids incomputational space. Complex geometries in the physical space can be modeled using multiple overlapping grids that are transformed into computational space. In this work, finite difference schemes are used that necessitate the addition of psuedo- or ghost-points in the overlap region of the grids for closure of the difference stencil. The functional values at these ghost points must be approximated from the values at the original grid points. This paper investigates interpolation techniques for these overset grids. An n th order interpolation scheme using Lagrange …
Derivation Of Equations Of Motion For A Four Link Robotic Leg For A Walking Vehicle, Andrew B. Wright
Derivation Of Equations Of Motion For A Four Link Robotic Leg For A Walking Vehicle, Andrew B. Wright
Journal of the Arkansas Academy of Science
A four degree of freedom leg for a walking robot has been modeled using Newton's method. Unlike robot manipulators, which have a fixed base, a leg model must include inertial forces due to base motion. These forces have been included in the formulation. These equations can be used for design, simulation, and control. The inverse kinematics for this leg are also presented. This allows the joint angles to be computed from a desired foot-hold position.
Computer Model For Predicting Aids Among Intravenous Drug Users, Daniel Berleant, R. Ron Goforth, Jun Yuan
Computer Model For Predicting Aids Among Intravenous Drug Users, Daniel Berleant, R. Ron Goforth, Jun Yuan
Journal of the Arkansas Academy of Science
Intravenous drug abuse (IVDA) is an important cause of HIV transmission. Computer simulation is one way to understand and predict the spread of HIV infection among IVDAs. We design and simulate HIV infection among IVDAs and the impact of AIDS on this community, and thereby predict future IVDA population, HIV levels, AIDS levels, and AIDS deaths in this group. The HIV to AIDS, and AIDS to Death latencies are described by probability density functions (PDFs) in this model. Factors such as the recruit, quit, and normal death rate of IVDAs, are considered, as well as the infection and removal rates …
Simple Synchronous Detector For Spectroscopic Studies, Mokhtar Mofidi, M. Keith Hudson, Reagan Cole, James D. Wilson
Simple Synchronous Detector For Spectroscopic Studies, Mokhtar Mofidi, M. Keith Hudson, Reagan Cole, James D. Wilson
Journal of the Arkansas Academy of Science
Lock-in-amplifiers are used in many applications for signal processing and offer the ability to discriminate high levels of noise. While these instruments are very powerful and offer many features, they are not portable and are expensive. An economical and easy to use alternative circuit is presented which incorporates pre-amplification, reference, and synchronous detection on one circuit board. The design can be used in laboratory or process control situations where its small size and low cost are advantageous. The circuit was successfully applied to moderate and high level signals as seen in flame infrared emission detection and in a portable radiometer …
Construction And Software Design For A Microcomputer Controlled Ph/Ion Titrator, Edmond W. Wilson Jr., Dennis K. Thompson, James E. Mackey
Construction And Software Design For A Microcomputer Controlled Ph/Ion Titrator, Edmond W. Wilson Jr., Dennis K. Thompson, James E. Mackey
Journal of the Arkansas Academy of Science
The construction of an automated titration device is described. The major components include an Apple II+ Microcomputer and 8-bit parallel interface. Fisher Accumet, Model 520 Digital pH/lon Meter, Gilmont Micrometer Buret of 2.5 mL capacity, Sigma stepper motor, power supply and driver to operate the buret, and a constant temperature bath of ± 0.005 °C stability. The limitations of the system are 0.001 pH/0.1 mv for the pH/ion sensing system, and 0.125 μL per step for the buret. The system as described is designed to determine equilibrium constants for metal ion-amino acid complexes. By changing the software a variety of …
Use Of A Calculator Chip For Realtime Data Processing, Jeffrey O. Cohen, Hal E. Mcloud
Use Of A Calculator Chip For Realtime Data Processing, Jeffrey O. Cohen, Hal E. Mcloud
Journal of the Arkansas Academy of Science
No abstract provided.