http://idea.library.drexel.edu/handle/1860/1151 Search the Channel search http://idea.library.drexel.edu/simple-search http://idea.library.drexel.edu/handle/1860/3665 Title: Combined Audio and Video Analysis for Guitar Chord Identification <br/> <br/>Authors: Hrybyk, Alex <br/> <br/>Abstract: This research presents a multi-modal approach to automatically identifying guitar chords using audio and video of the performer. Chord identification is for stringed instruments adds extra ambiguity as a single chord or melody may be played in different positions on the fretboard. Preserving this information is important, because it signifies the original fingering, and implied “easiest” way to perform the selection. This chord identification system combines analysis of audio to determine the general chord scale (i.e. A major, G minor), and video of the guitarist to determine chord voicing (i.e. open, barred, inversion), to accurately identify the guitar chord. <br/> <br/>Description: Student Author: Alex Hrybyk, College of Engineering, ECE; Adviser: Dr. Youngmoo Kim, College of Engineering, ECE http://idea.library.drexel.edu/handle/1860/3664 Title: Efficient Acoustic Feature Computation Using FPGAs <br/> <br/>Authors: Schmidt, Erik M.; Speck, Jacquelin A. <br/> <br/>Abstract: Many recent advances in music information retrieval (MIR) have been data-driven. Widespread performance evaluations on common data sets, like the annual MIREX events, have been instrumental in advancing the field. Such endeavors incur large computational costs and could potentially benefit from faster calculation of acoustic features. Traditional cluster-based solutions are expensive and space- and power inefficient. The massively parallel architecture of the field programmable gate array (FPGA) makes it possible to design lower-cost, applicationspecific chips rivaling cluster speed for large-scale acoustic feature computation. Such devices also show potential for implementations of MIR systems on embedded devices where hardware acceleration is a necessity. We present a prototype Xilinx System Generator (XSG) library for acoustic feature calculation. We use a genre classification task to compare the performance of simulated hardware features to those computed using standard methods. Finally, we discuss ongoing efforts toward a working hardware design. <br/> <br/>Description: Student Author: Erik M. Schmidt, College of Engineering, ECE; Student Author: Jacquelin A. Speck, College of Engineering, ECE; Adviser: Dr. Youngmoo Kim, College of Engineering, ECE http://idea.library.drexel.edu/handle/1860/3663 Title: Musical Humanoids <br/> <br/>Authors: Grungerg, David; Batula, Alyssa <br/> <br/>Abstract: Humanoids have become increasingly capable in recent years. Enabling these robots to mimic human musical activities is an ongoing area of research; however, most developments in this field have employed pre-programmed motions, and robots remain incapable of responding to changes in music. We have developed algorithms that allow a small humanoid robot, RoboNova, to dance to music and play notes on a keyboard. This robot serves to prototype our algorithms before applying them to Hubo, a more advanced life-sized humanoid. We hope to make Hubo capable of musical interaction, thereby providing a platform to study robot motor control and human creative expression. <br/> <br/>Description: Student Author: David Grunberg, College of Engineering, ECE; Student Author: Alyssa Batula, College of Engineering, ECE; Adviser: Dr. Youngmoo Kim, College of Engineering, ECE; Adviser: Paul Y. Oh, College of Engineering, ECE http://idea.library.drexel.edu/handle/1860/3662 Title: DrexelCast: Orchestral Performance Companion <br/> <br/>Authors: Hrybyk, Alex; Grungerg, David; Prockup, Matthew <br/> <br/>Abstract: Many people enjoy live orchestral performances, but those without musical training may find it hard to relate to the music. We have developed a system that helps users by guiding them through the performance using a handheld application in realtime. Using chroma features and dynamic time warping, we attempt to align the live performance audio with that of a previously annotated reference recording. The aligned position is transmitted to users’ handheld devices and pre-annotated information about the piece is displayed synchronously. <br/> <br/>Description: Student Author: Alex Hrybyk, College of Engineering, ECE; Student Author: David Grunberg, College of Engineering, ECE; Student Author: Matthew Prockup, College of Engineering, ECE; Adviser: Dr. Youngmoo Kim, College of Engineering, ECE http://idea.library.drexel.edu/handle/1860/3583 Title: The Low to Intermediate Temperature Oxidation of n Propylcyclohexanein a Pressurized Flow Reactor <br/> <br/>Authors: Corrubia, Julius; Farid, Farinaz; Cernansky, Nicholas; Miller, David <br/> <br/>Abstract: Currently computational capabilities for next generation, air-breathing propulsion systems are underutilized in terms of combustion. This lack thereof represents an area of immense research that has ignited a profound interest within the combustion community. However, major hurdles exist that obstruct the community’s pathway to this goal. The important problems that need to be addressed can be grouped into two categories of project goals. First, the combustion properties of practical fuels and their associated surrogate components and mixtures used in air-breathing combustion systems must be understood and quantified. Second, the development of detailed reaction models and strategies for model reduction for use in large-scale simulations must be addressed. These project goals present a daunting task because of the large number of chemical components and classes contained in practical jet fuels derived from petroleum or alternative resources, such as natural gas and coal. It is well accepted that the solution to this problem is to develop surrogates for real jet fuels that contain a reduced amount of chemical components and classes. These surrogates are developed to match the physical properties and chemical kinetics of the practical jet fuels such that the combustion phenomena of the surrogates mimic that of the real jet fuel. Currently the combustion properties of practical jet fuels remain poorly understood and surrogate development is an ongoing process. The desired outcome of this effort is the improved qualitative understanding and quantitative predictability of the combustion properties of practical jet fuels and their surrogates, and the development of reliable kinetic models that may be used in practical combustion applications for design purposes. The JP-8 jet fuel cycloalkane surrogate component n-propylcyclohexane was oxidized in the Drexel Pressurized Flow Reactor (PFR) to gain further insight into its associated combustion kinetics. <br/> <br/>Description: This poster was presented at Drexel University Research Day 2011. http://idea.library.drexel.edu/handle/1860/3241 Title: PS34: An analysis of microbial spore recovery methods for sampling plan validation <br/> <br/>Authors: Griffith, Kyle C.; Gurian, Patrick L.; Wen, Jin <br/> <br/>Abstract: Potential health risks associated with biological agent surface contamination indoors have created a need for improved understanding of surface sampling in contamination assessment and resolution. In this study microbial spore recovery data is examined to identify potential relationships between final spore counts and parameters related to sampling methodology. A review of the results reveals that the collection method and location with respect to release source have a statistically significant relationship with microbial recovery rates. Amongst collection methods the wipe proved to have the strongest positive relationship with final spore count recoveries. Surface type sampled appears to have minimal effects on microbial spore recovery rates. Additional experimental data is required to improve the accuracy of statistical analyses and validate current microbial sampling techniques. http://idea.library.drexel.edu/handle/1860/3240 Title: 306-Departmental Hirsch Index values scale linearly with chemistry department size <br/> <br/>Authors: Addison, A.W; Tran, Thuong H. http://idea.library.drexel.edu/handle/1860/3238 Title: Stability and accuracy of VAV box control at low flows <br/> <br/>Authors: Liu, Ran; Wen, Jin; Zhou, Xiaohui; Klaassen, Curtis http://idea.library.drexel.edu/handle/1860/3237 Title: Formaldehyde emission modeling in manufactured homes <br/> <br/>Authors: Bayer, Jacqueline; Gurian, Patrick; Wen, Jin http://idea.library.drexel.edu/handle/1860/3236 Title: Study of forward and inverse airflow models for use in systematic design of indoor air sensor systems <br/> <br/>Authors: Chen, Lisa; Wen, Jin