@article{jernigan_fahmy_buckner_2009, title={Implementing a Remote Laboratory Experience Into a Joint Engineering Degree Program: Aerodynamic Levitation of a Beach Ball}, volume={52}, ISSN={["1557-9638"]}, DOI={10.1109/TE.2008.924217}, abstractNote={This paper details a successful and inexpensive implementation of a remote laboratory into a distance control systems course using readily available hardware and software. The physical experiment consists of a beach ball and a dc blower; the control objective is to make the height of the aerodynamically levitated beach ball track a reference trajectory by manipulating the voltage to the blower. MATLAB/Simulink coupled with xPC target serve as the controller platform, while microsoft netmeeting and standard Internet video conferencing equipment are used to interface the distance-learning students with the laboratory equipment. Both local students at North Carolina State University's campus in Raleigh and distance students at the University of North Carolina at Asheville completed the laboratory experiment. In a student survey, distance students participating in the lab remotely rated the experience as favorably as local students. Course grades, including the design project grade, were similar between the two groups.}, number={2}, journal={IEEE TRANSACTIONS ON EDUCATION}, author={Jernigan, Shaphan R. and Fahmy, Yusef and Buckner, Gregory D.}, year={2009}, month={May}, pages={205–213} }
 @article{fahmy_conrad_2001, title={Electrosintering of iron powder compacts}, volume={32}, DOI={10.1007/s11661-001-0097-7}, number={3A}, journal={Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science}, author={Fahmy, Y. and Conrad, H.}, year={2001}, pages={811–819} }
 @inproceedings{wiebe_hare_carter_fahmy_russell_ferzli_2001, title={Supporting lab report writing in an introductory materials engineering lab}, booktitle={2001 ASEE annual conference & exposition: Proceedings ; June 24-27, 2001, Albuquerque Convention Center, Albuquerque, New Mexico}, publisher={Washington, DC: ASEE}, author={Wiebe, E. N. and Hare, T. M. and Carter, M. and Fahmy, Y. and Russell, R. and Ferzli, M.}, year={2001} }
 @article{boissy_wu_fahmy_conrad_1999, title={Experimental study of the yield stress of electrorheological suspensions under AC field: Comparison with a theoretical model}, volume={13}, ISSN={["0217-9792"]}, DOI={10.1142/s0217979299001788}, abstractNote={ Recently a model describing the interaction between the particles of an electrorheological suspension and the resulting properties (yield stress, current density) has been proposed by Wu and Conrad. This model takes into account both the conductivity and the permittivity of each constituent of the suspension and predicts the behavior under DC and AC fields. The goal of the present work is to compare the predictions of this model with data available in the literature and with additional experiments using DC and AC fields at frequencies up to 2000 Hz. The ER fluids used in our experiments are suspensions of different ceramics particles ( Al 2 O 3, ZrO 2, TiO 2, CaTiO 3, BaTiO 3) in silicone oil. These particles cover a wide range of permittivity and conductivity, which allows us to study the ER effect with varying values of the conductivity and/or permittivity mismatch between the particles and the liquid. The model is in reasonable accord with experiment. }, number={14-16}, journal={INTERNATIONAL JOURNAL OF MODERN PHYSICS B}, author={Boissy, C and Wu, CW and Fahmy, Y and Conrad, H}, year={1999}, month={Jun}, pages={1775–1782} }
 @article{campbell_fahmy_conrad_1999, title={Influence of an electric field on the plastic deformation of fine-grained Al2O3}, volume={30}, ISSN={["1073-5623"]}, DOI={10.1007/s11661-999-0119-4}, number={11}, journal={METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE}, author={Campbell, J and Fahmy, Y and Conrad, H}, year={1999}, month={Nov}, pages={2817–2823} }
 @article{conrad_guo_fahmy_yang_1999, title={Influence of microstructure size on the plastic deformation kinetics, fatigue crack growth rate, and low-cycle fatigue of solder joints}, volume={28}, ISSN={["0361-5235"]}, DOI={10.1007/s11664-999-0184-x}, number={9}, journal={JOURNAL OF ELECTRONIC MATERIALS}, author={Conrad, H and Guo, Z and Fahmy, Y and Yang, D}, year={1999}, month={Sep}, pages={1062–1070} }
 @article{campbell_fahmy_conrad_1999, title={Plastic deformation kinetics of fine-grained alumina}, volume={30}, ISSN={["1543-1940"]}, DOI={10.1007/s11661-999-0118-5}, number={11}, journal={METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE}, author={Campbell, J and Fahmy, Y and Conrad, H}, year={1999}, month={Nov}, pages={2809–2816} }
 @article{fahmy_shen_tucker_spontak_koch_1999, title={Possible evidence for the stabilization of beta-carbon nitride by high-energy ball milling}, volume={14}, ISSN={["2044-5326"]}, DOI={10.1557/JMR.1999.0334}, abstractNote={The possibility of stabilizing the theoretically predicted β–C3N4phase by high-energy ball milling is investigated. Charges of graphitic carbon were milled with and without minor alloying additions under different atmospheric media, namely gas and/or liquid phases of nitrogen, air, or ammonia. Milling was performed at either of two energy levels for periods of up to 48 h. The β–C3N4phase was found to exist as small crystallites in a matrix of primarily amorphous carbon at volume fractions estimated between 5 and 10 at.%. High-resolution electron diffraction and x-ray diffraction indicate that the crystalline nature of the C3N4phase corresponds with a hexagonal lattice witha= 6.46 Å andc/a= 0.374, which are within 2% of the theoretically calculated lattice parameter values. Analysis of electron energy-loss spectroscopy (EELS), x-ray photoelectron spectroscopy (XPS), and Fourier transform infrared (FTIR) spectra verify the presence of chemically bonded carbon and nitrogen with chemical states reflecting combinedsp2andsp3hybridization. Chemical analysis confirms nitrogen enrichment at levels consistent with the C3N4stoichiometry and the estimated degree of stabilization. The possible mechanism(s) responsible for the stabilization of the β–C3N4phase are briefly discussed.}, number={6}, journal={JOURNAL OF MATERIALS RESEARCH}, author={Fahmy, Y and Shen, TD and Tucker, DA and Spontak, RL and Koch, CC}, year={1999}, month={Jun}, pages={2488–2499} }
 @article{fahmy_hare_tooke_conrad_1998, title={Effects of a pulsed magnetic treatment on the fatigue of low carbon steel}, volume={38}, ISSN={["1359-6462"]}, DOI={10.1016/S1359-6462(98)00046-3}, abstractNote={Results of cavitation erosion tests for EN8 steel, nickel-aluminium bronze (NAB), 70/30 brass and aluminium alloy AA2014-T6 following alternating magnetic field (AMF) treatment are presented. These alloys were selected because of their magnetic nature; EN8 steel is ferromagnetic, NAB and 70/30 brass are diamagnetic and AA2014 alloy is paramagnetic. The indirect cavitation erosion tests (ASTM G32–10 standard) were fulfilled at a frequency of 20 kHz in deionized water which was maintained at room temperature and ambient pressure for a predetermined time. The results show significant decrease in the mass loss for all samples that had underg1 AMF treatment. The eroded samples were characterised by means of scanning electron microscopy, while microhardness measurements showed an increase in the surface hardness as a result of the AFM treatment. The results of X-ray diffraction indicated formation of more compressive residual stresses following treatment, while examination by transmission electron microscopy showed evidence of dislocation movement away from grain boundaries. In the case of the NAB and 20014-T6 alloys, there was evidence of new precipitation. By considering the deformed state and the magnetic nature of each alloy, mechanisms explaining the increase in the cavitation erosion resistance due to the treatment are proposed and discussed.}, number={9}, journal={SCRIPTA MATERIALIA}, author={Fahmy, Y and Hare, T and Tooke, R and Conrad, H}, year={1998}, month={Apr}, pages={1355–1358} }
 @article{hacke_fahmy_conrad_1998, title={Phase coarsening and crack growth rate during thermo-mechanical cycling of 63Sn37Pb solder joints}, volume={27}, ISSN={["0361-5235"]}, DOI={10.1007/s11664-998-0125-0}, number={8}, journal={JOURNAL OF ELECTRONIC MATERIALS}, author={Hacke, PL and Fahmy, Y and Conrad, H}, year={1998}, month={Aug}, pages={941–947} }
 @article{shen_shmagin_koch_kolbas_fahmy_bergman_nemanich_mcclure_sitar_quan_1997, title={Photoluminescence from mechanically milled Si and SiO2 powders}, volume={55}, ISSN={["0163-1829"]}, DOI={10.1103/physrevb.55.7615}, abstractNote={The photoluminescence (PL) in as-received and milled Si and SiO2 powder is reported. The Si and SiO2 powder is characterized by chemical analysis, Raman scattering, x-ray photoelectron spectra, infrared absorption, x-ray diffraction, and differential thermal analysis. The results indicate that the Si powder has amorphous Si oxide and suboxide surface layers. The milling of Si powder results in the formation of nanocrystalline/amorphous Si components. An amorphous SiO2 component is formed by milling crystalline SiO2. The PL spectra for as-received Si, milled Si, and SiO2 powder exhibit similar peak shapes, peak maxima, and full width at half maximum values. For both the as-received and the milled Si powder, experimental results appear to exclude mechanisms for PL related to an amorphous Si component or Si-H or Si-OH bonds, or the quantum confinement effect. Similarly, for milled SiO2 powder mechanisms for PL do not appear related to Si-H or Si-OH bonds. Instead the greatly increased intensity of PL for milled SiO2 can be related to both the increased volume fraction of the amorphous SiO2 component and the increased density of defects introduced in the amorphous SiO2 upon milling. It is suggested that the PL for as-received Si, milling-induced nanocrystalline/amorphous Si, and milled SiO2 results from defects, such as the nonbridging oxygen hole center, in the amorphous Si suboxide and/or SiO2 components existing in these powder samples. The PL measurement for milled SiO2 is dependent on air pressure whereas that for as-received SiO2 is not, suggesting that new emitting centers are formed by milling.}, number={12}, journal={PHYSICAL REVIEW B}, author={Shen, TD and Shmagin, I and Koch, CC and Kolbas, RM and Fahmy, Y and Bergman, L and Nemanich, RJ and McClure, MT and Sitar, Z and Quan, MX}, year={1997}, month={Mar}, pages={7615–7623} }