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Source Noise Isolation During Electric Vehicle Pass-By Noise Testing Using Multiple Coherence
No full textDue to the nearly silent operation of an electric motor, it is difficult for pedestrians to detect an approaching electric vehicle. To address this safety concern, the National Highway Traffic Safety Administration issued the Federal Motor Vehicle Safety Standard (FMVSS) No. 141, “Minimum Sound Requirements for Hybrid and Electric Vehicles”. This FMVSS 141 standard requires the measurement of electric vehicle noise according to certain test protocols; however, performing these tests can be difficult since inconsistent results can occur in the presence of transient background noise. Methods to isolate background noise during static sound measurements have already been established, though these methods are not directly applicable to a pass-by noise test where neither the background noise nor the vehicle itself as it travels past the microphone produce stationary sound signals. In this work, a 2017 Chevrolet Bolt electric vehicle is used for physical testing of pass-by noise at the Kettering University GM Mobility Research Center (GMMRC), an inner-city proving ground in Flint, Michigan. Sound signal processing is performed using a multiple coherence approach including discrete time intervals to isolate background noise from the noise of the electric vehicle. The suitability of both the signal processing method and the MRC facility for pass-by noise testing of electric vehicles is investigated and presented
A Robust Failure Proof Driver Drowsiness Detection System Estimating Blink and Yawn
No full textThe fatal automobile accidents can be attributed to fatigued and distracted driving by drivers. Driver Monitoring Systems alert the distracted drivers by raising alarms. Most of the image based driver drowsiness detection systems face the challenge of failure proof performance in real time applications. Failure in face detection and other important part (eyes, nose and mouth) detections in real time cause the system to skip detections of blinking and yawning in few frames. In this paper, a real time robust and failure proof driver drowsiness detection system is proposed. The proposed system deploys a set of detection systems to detect face, blinking and yawning sequentially. A robust Multi-Task Convolutional Neural Network (MTCNN) with the capability of face alignment is used for face detection. This system attained 97% recall in the real time driving dataset collected. The detected face is passed on to ensemble of regression trees to detect the 68 facial landmarks. The eye and mouth landmarks are isolated to detect the blink and yawning by identifying the open/closed state by calculating their aspect ratios. The proposed system combines the two detectors with failure proof strategies. A Minimization of Sum Squared Error based object tracker is used to track the face in the video when the face detector fails. A new binary classification neural network is deployed to reinforce the detection of eye and mouth state when the face landmark detection fails. A combination of the face, landmark detector and the failure proof systems such as the object tracker and classification neural network provides a driver drowsiness detection system with nearly 99.9% accuracy in detecting blinking and yawning
Pre-bending a dynamic compression plate significantly alters strain distribution near the fracture plane in the mid-shaft femur
No full textThis study evaluated the effect of pre-bending dynamic compression plates on fracture site compression. Recommendations of 1 to 2 mm of pre-bend have been proposed, but there does not appear to be experimental data to confirm the optimal pre-bend magnitude. Dynamic compression plating was performed on the lateral convex surface of 18 femoral analogs to fixate a simulated mid-shaft fracture. Plates with 0 mm (flat plate), 1 mm, and 2 mm of pre-bend were evaluated for their production of compression by determining the strain magnitudes for 10 equal-sized zones across the anterior cortex at the osteotomy site using digital imaging correlation. The 0 and 1 mm plates produced significantly more compression at the near cortex (p = 0.001 and p = 0.003, respectively) than the 2 mm plate. However, the 0 and 1 mm plates also created visible diastasis at the far cortex, while the 2 mm plate exhibited compression across all zones. The strain magnitudes for the 0 mm (R2 = 0.62) and 1 mm (R2 = 0.86) plates linearly and significantly decreased from the region adjacent to the plate until a region 50%–60% across the analog diameter. In contrast, the 2 mm plate exhibited uniform strains across the osteotomy site. This study demonstrates that pre-bending a dynamic compression plate 2 mm prior to fixation on a convex lateral femur provides the most compression at the far cortex. It also produces more uniform compression across the fracture when compared to 0 and 1 mm of pre-bend
It Seemed Like a Good Idea at the Time (Hindsight is 2020)
Get PDFCharles Kettering reportedly quipped: “99% of success is built on failure”. Yet, those failures rarely see the light of day, as publications naturally focus on successful innovations rather than the many failures that preceded them. The academic community is poorer as a result, as we are all left to re-create the same failures independently, rather than learning from one another. In this panel, we offer an opportunity to “celebrate failure”, by presenting four separate case studies of computing education initiatives that “seemed like a good idea at the time”, but ended up being spectacular failures. The presenters will discuss their “good ideas”, the disappointing results, and (most importantly) the lessons learned! Our goal is to foster a supportive community where failure is celebrated rather than criticized. We hope to laugh and learn together from these experience reports
A Queueing Model with Server Breakdowns, Repairs, Vacations, and Backup Server
No full textQueueing models wherein having a backup server during the absences (caused by vacations and breakdowns) of the main server have found many applications in practice. Such services offered by a backup server can be viewed as the (main) server working during a vacation or during a breakdown period. A backup server offering services can be thought of as the main server working (at a reduced rate) on vacations/repairs. Using Neuts’ versatile point process for the arrivals and modeling the service times with phase type distributions, we propose a model that generalizes some of the previously published ones on working-vacation-breakdown-repair queues. We carry out the steady-state analysis and report interesting illustrative numerical examples. We also prove decomposition results for the rate matrix and the mean number in the system under some special cases
Hybrid triad provides fracture plan stability in a computational model of a Pauwels Type III hip fracture
No full textThe study utilized finite element method to determine displacements and stresses in a set of Pauwels Type III femoral neck fractures repaired using 3 techniques (cannulated screws (Triad), sliding hip screw (SHS), and a Hybrid (SHS + cannulated screws). The research found that shear displacement doubled between the 65° and 75° fracture angles regardless of fixation construct. The SHS alone was the least stable construct, with highest construct stresses and shear displacement along the fracture plane. The stability of the Hybrid and Triad constructs were similar, but stress in the Hybrid was lower suggesting it would provide a higher load to failure than the Triad
HLC Focused Visit Determination Letter 2020
Get PDFThis letter serves as formal notification and official record of action taken concerning Kettering University by the Institutional Actions Council of the Higher Learning Commission at its meeting on May 04, 2020. The date of this action constitutes the effective date of the institution’s new status with HLC.
Action. IAC concurred with the evaluation team’s findings and affirmed that the institution has demonstrated sufficient evidence that it has addressed the concerns related to faculty workload policy. In taking this action, the IAC considered materials from the most recent evaluation and the institutional response (if applicable) to the evaluation findings
11/4/2020: Faculty Senate Approved Meeting Minutes
No full textSubmit Faculty COVID Survey Summary to Administration for review. Approved (13,0) Faculty Senate requests clarification from the administration as to the meaning of unusual use of university resources in the Kettering University Copyright Policy. Approved (13,0) The Faculty Senate requests the creation of a university-wide task force that includes faculty senators as its members to review and possibly revise the Kettering University Copyright Policy and other policies related to intellectual property. Approved (13,0
10/28/2020: Faculty Senate Approved Meeting Minutes
No full textMotion to table Policy Review Discussion. Approved (12,0