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Novel Applications of Walnut Husk Extracts
No full textDuring the processing of nuts, a considerable amount of material such as husks and shells are produced and often discarded as compost or landfill. In producing walnuts for retail sale, the husks are often discarded. Walnut husks contain tannins and polyphenolic compounds and the husk may be used for treatment of intestinal parasites and fungal infections. Green walnut husks harvested from Missouri and Michigan were extracted in ethanol using ultrasonic assisted extraction and extracted using supercritical carbon dioxide with an ethanol modifier. Ultrasonic assisted extraction was performed at room temperature for an hour, while supercritical fluid extraction was performed at 60°C with an ethanol mole fraction of 15%. The effects of pretreatment drying of walnut husks upon antioxidant potential as measured by the total phenolic content (TPC) assay were evaluated. A variety of diverse applications were evaluated including antioxidant and corrosion inhibition of extracts blended in paints, oxygen scavenging of extracts infused in plastics, and antimicrobial effects
Photogrammetry and Optical Methods in Structural Dynamics - A Review
No full textMany of energy harvesting devices use piezoelectric elements to convert mechanical vibrations into usable electrical energy. The input excitation is usually assumed to be a deterministic harmonic wave, while in practical situations; the mechanical excitation of the media is a random signal. The objective of this research is to study the energy harvesting in piezoelectric devices using the random vibration theory. At the first step a lumped parameter physical model of the device is presented. A mathematical model is then developed by obtaining the normalized differential equations governing the voltage induced in the energy harvesting circuit as well as the length of the piezoelectric material. The random vibration theory is then utilized to derive analytical expressions for the statistical properties of the voltage, power and the length of the piezoelectric material in terms of the statistical properties of the excitation which is assumed to be a band limited white noise. It is shown that with proper selection of the system parameters, the expected value of the harvested power can be effectively maximized. The qualitative and quantitative knowledge resulting from this effort is expected to enable the analysis, optimization, and synthesis of piezoelectric energy harvesting devices
Unveiling of the Chevy Volt 10
No full textThis is at an AutoDrive unveiling event on October 30, 2017. Pictured is the Chevy Volt car and tarp is finished being lifted by students, student group photo.https://digitalcommons.kettering.edu/autodrive_gallery/1018/thumbnail.jp
Using Student-Active Simulations in Lean Education
No full textTeaching Lean is a challenge. Lean is different enough that simply talking about it in a lecture is not convincing. The challenge of teaching undergraduate students at Kettering University has resulted in coursework improvements that have encouraged hands-on, student-active simulations. Four principles for applying simulations to coursework are presented with examples, as well as suggestions for implementing simulations into crowded courses
Reliability Design in Gradual Failures: A Functional-Parametric Approach
No full textThis conceptual paper discusses the main provisions of the functional-parametrical (FP) approach in reliability studies. The FP itself is a detailed frame algorithm suggested for use in design of new and unique technical items. The article also presents possibilities and perspectives of using FP approach in problems for “building in” reliability in analogy to these for technical devices and systems. It is pointed out that for solving problems of analysis and ensuring of desired reliability it is appropriate to use parallel and distributed processing techniques. We discuss the idea of constructing efficient parallel algorithms for multivariate statistical analysis necessary to calculate estimates of the probability for failure-free operation with different nominal values of internal parameters. More use of parallel algorithms, including in continuous media via discretization are discusse
This is at an AutoDrive unveiling event on October 30, 2017. Pictured is the Chevy Volt car and tarp is finished being lifted by students, front view.
No full textThis is at an AutoDrive unveiling event on October 30, 2017. Pictured is the Chevy Volt car and tarp is finished being lifted by students, side view.https://digitalcommons.kettering.edu/autodrive_gallery/1017/thumbnail.jp
Experimental Modal Analysis on a Tyre - Lessons Learned
No full textExtracting the mode shapes of a tyre can be very challenging, particularly for the transverse and the longitudinal mode shapes. The current paper presents results for experimental modal analysis (EMA) tests on a tyre using both an impact hammer and an electro-dynamic shaker. The radial modes of the tyre were excited using a modal impact hammer. The possibility of using a narrow metal screw that could be attached to the modal impact hammer to excite the transverse and torsional mode shapes of the tyre was studied. The advantages and drawbacks of using a mechanical shaker to excite the structure and using roving accelerometers to measure the response were also studied. This study also describes a method to extract the repeated roots of a tyre using the experimental modal analysis. The current paper summarises the lessons learned from different experiment cases that were performed to extract mode shapes of a tyre