Arm Mbed – AWS IoT System Integration [Open access]

This project explores the different Internet of Things (IoT) architectures and the available platforms to define a general IoT Architecture to connect Arm microcontrollers to Amazon Web Services. In order to accommodate the wide range of IoT applications, the architecture was defined with different routes that an Arm microcontroller can take to reach AWS. Once this Architecture was defined, a performance analysis on the different routes was performed in terms of communication speed and bandwidth. Finally, a Smart Home use case scenario is implemented to show the basic functionalities of an IoT system such as sending data to the device and data storage in the Cloud. Furthermore, a Cloud ML algorithm is triggered in real time by the Smart Home to receive a prediction of the current Comfort Level in the room

Diffuse Optical Biomarkers Of Breast Cancer

Diffuse optical spectroscopy/tomography (DOS/DOT) and diffuse correlation spectroscopy (DCS) employ near-infrared light to non-invasively monitor the physiology of deep tissues. These methods are well-suited to investigation of breast cancer due to their sensitivity to physiological parameters, such as hemoglobin concentration, oxygen saturation, and blood flow. This thesis utilizes these techniques to identify and develop diffuse optical biomarkers for the diagnosis and prognosis of breast cancer. Notably, a novel DOS prognostic marker for predicting pathologic complete response to neoadjuvant chemotherapy using z-score normalization and logistic regression was developed and demonstrated. This investigation found that tumors that were not hypoxic relative to the surrounding tissue were more likely to achieve complete response. Thus, the approach could enable dynamic feedback for the optimization of chemotherapy. Similar logistic regression models based on other optical parameters distinguished tumors from the surrounding normal tissue and diagnosed whether a lesion was malignant or benign. These diagnostic markers improve the ability of DOS/DOT to accurately localize tumors and could serve as a type of optical biopsy to classify suspicious lesions. Another study carried out the first longitudinal DCS blood flow monitoring over a full course of neoadjuvant chemotherapy in humans; this work explored initial correlations between blood flow and response to therapy and showed how DCS and DOS together can more accurately probe tumor physiology than either modality alone. Finally, still other thesis research included the final construction and initial imaging tests of a DOT instrument incorporated into a clinical MRI suite and the optimization of the DOT reconstruction algorithm. In total, these instrumental and algorithmic advances improved DOT image quality, helped to increase contrast between malignant and normal tissue, and eventually could lead to better understanding of tumor microvasculature. These contributions represent important steps towards the translation of diffuse optics into the clinic, demonstrating significant roles for optics to play in the diagnosis, prognosis, and physiological understanding of breast cancer

The Calibration of the HST Kuiper Belt Object Search: Setting the Record Straight

The limiting magnitude of the HST data set used by Cochran et al. (1995) to detect small objects in the Kuiper belt is reevaluated, and the methods used are described in detail. It is shown, by implanting artificial objects in the original HST images, and re-reducing the images using our original algorithm, that the limiting magnitude of our images (as defined by the 50% detectability limit) is $V=28.4$. This value is statistically the same as the value found in the original analysis. We find that $\sim50$ of the moving Kuiper belt objects with $V=27.9$ are detected when trailing losses are included. In the same data in which these faint objects are detected, we find that the number of false detections brighter than $V=28.8$ is less than one per WFPC2 image. We show that, primarily due to a zero-point calibration error, but partly due to inadequacies in modeling the HST'S data noise characteristics and Cochran et al.'s reduction techniques, Brown et al. 1997 underestimate the SNR of objects in the HST dataset by over a factor of 2, and their conclusions are therefore invalid.Comment: Accepted to ApJ Letters; 10 pages plus 3 figures, LaTe

Notes on the Wang et al. 2632^{63} SHA-1 Differential Path

Although advances in SHA-1 cryptanalysis have been made since the 2005 announcement of a $2^{63}$ attack by Wang et al., the details of the attack have not yet been vetted; this note does just that. Working from Adi Shamir\u27s 2005 CRYPTO rump session presentation of Wang et al.\u27s work, this note corroborates and presents the differential path and associated conditions for the two-block attack. Although the error analysis for the advanced condition correction technique is not verified, a method is given which yields a two-block collision attack on SHA-1 requiring an estimated $2^{62}$ SHA-1 computations if the original error analysis by Wang et al. is correct

Faculty Recital: 2016 Octubafest

Kennesaw State University presents 2016 Octubafest, a faculty recital featuring Martin Cochran, Artist-in-Residence in Euphonium and Bernard Flythe, Artist-in-Residence in Tuba, along with Judy Cole, Artist-in-Residence in Collaborative Piano.https://digitalcommons.kennesaw.edu/musicprograms/1699/thumbnail.jp

“It Seemed Like Reaching for the Moon:” Southside Virginia’s Civil Rights Struggle Against The Virginia Way, 1951-1964

During the American civil rights movement of the 1950s and 1960s and in the historiography, Virginia held a racially moderate reputation. Scholarship on civil rights in Virginia typically credits racial moderation with implementing integration in the state while avoiding major violence and protest. In Southside Virginia, the rural south-central area of the state dominated by tobacco and textile mills with a substantial black population, two towns became the sites of significant civil rights activity. Both Farmville and Danville had direct-action movements spearheaded by local African American students and activists, but these movements drew limited national attention despite extreme reaction and retaliation by local whites. Farmville (the county seat of Prince Edward County) was the locale where one of Brown v. Board of Education suits originated; in response to the ruling to integrate, the county closed all public schools for five years. The Danville movement saw enormous police brutality in response to marches and sit-ins, but it did not sustain national media attention despite support from national activist organizations, so it seemingly failed. Analysis of these two local movements reveals that in Southside Virginia, it was not that racial “moderation” prevented major demonstrations. Instead there was a coordinated effort among the white social and political elite, motivated by an ideology heavily influenced by southern paternalism, honor, and Confederate memory, to undermine and suppress the direct-action tactics attempted by local black activists. The local movements found some progress when they attacked structural discrimination at the environmental and economic levels

Wire Cloth as Porous Material for Transpiration-cooled Walls

The permeability characteristics and tensile strength of a porous material developed from stainless-steel corduroy wire cloth for use in transpiration-cooled walls where the primary stresses are in one direction were investigated. The results of this investigation are presented and compared with similar results obtained with porous sintered metal compacts. A much wider range of permeabilities is obtainable with the wire cloth than with the porous metal compacts considered and the ultimate tensile strength in the direction of the primary stresses for porous materials produced from three mesh sizes of wire cloth are from two to three times the ultimate tensile strengths of the porous metal compacts

Twisting waves increase the visibility of nonlinear behaviour

Nonlinear behaviour for acoustic systems is readily measured at high acoustic pressures in gasses or bulk materials. However, at low acoustic pressures non-linear effects are not commonly observed. We find that by phase structuring acoustics beams, one observes evidence of non-linear behaviour at an acoustic pressure of 66.78 dB lower than non-structured beams in room temperature air. A bespoke 28-element ultrasonic phased array antenna was developed to generate short pulses that carry orbital angular momentum and are propagated over a short air channel. When sampling small areas of the wavefront, we observed a distinctive change in the frequency components near phase singularities. At these phase singularities the local propagation path is screwed, resulting in the collection signals from pulses traveling along different paths across the aperture of a microphone. The usually negligible frequency chirping that arises from nonlinear behaviour in air interfere at these singularity points and produce a distinctive distortion of the acoustic pulse. Simple physical movement in the system or super-sonic wave speeds do not yield similar results. Such distortions in measured frequency response near phase singularities could lead to errors for SONAR or acoustic communication systems, where received signals are integrated over a finite-area detector. With further development this behaviour could potentially lead to accurate measurement techniques for determining a material's nonlinear properties at lower acoustic pressure