110 research outputs found
The Pine Branch, Spring 1967
No full textThe Pine Branch. Periodical magazine. Created and published by the Creative Writing Club, English and Art Department, Valdosta State College. Valdosta, Georgia. Includes: editorials, photographs, poems, short stories, and other writings.Cover Gloria Thompson | Editorial Comment, poem Scott Cohen | Self Realization Gerald Boyd | Sketch Tim Teasley | Photograph Robert Winter | Wild Horses, poem Tim Teasley | Poem Terrence Carter | Sketch Mike Nelson | The Face E H Lightsey | Sketch Sandra Hester | Whispers Elinor Davis | Poems Susanne Evans | Photograph Robert Winter | The Copper Bowl E H Lightsey | Photograph Robert Winter | I See A Misery Larry Long | Sketch Pat Taylor | Modern Concept of the Theatre Stan DeHart | Photograph Billy Orr | Why the Bird, or Why the Bird Tim Teasley | Sketch I Tim Teasley | Inflexibility of an Afternoon Scott Cohen | Sketch Pat Taylor | Sky Tear David Talton | I Sent A Candle by Messenger E H Lightsey | James, James Dana Scouten | The Lover Durrett Bradford | The Raining Sound of Wheels Turning Lynn Smith | Terrible Fear Lynn Smith | Peachtree Creek Ralph Crawford | Photograph Robert Winter | Photograph Robert Winter | Fleeting Friends Tim Teasley | Dear Michael Mike Nelson | Car-Death Relationship,Sketch Tim Teasley | Photograph Robert Winter | Winter E H Lightsey | Sketch Elgin Freeman | Two Photographs Robert Winter | A Need Put Aside Larry Long | Untitled Scott Cohen | Sketch Pat Taylor | Sunday Night Diary E H Lightsey | Sketch Ronald Healan | Sketch Tim Teasley
Thumb Metacarpophalangeal Joint Hyperextension Deformity: Its Treatment and its Infuence on the Outcome of Trapeziectomy
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A reliability-based approach to determine the probability of Loss of Containment of Dangerous Goods in a rear-end collision in the automated marshalling process, using a multi-body dynamic model
No full textThe Dutch government provides a calculation method to determine the risks to society outside the boundaries of institutions handling Dangerous Goods (the risk affecting External Safety). The current method to calculate the risk affecting External Safety for train marshalling yards is deterministic, outdated, and not transparent. This thesis aims to improve the calculation method regarding rear-end collisions in automated marshalling. It provides a reliability-based approach to the study case Kijfhoek and uses a multi-body dynamic model to simulate the collisions. A Monte Carlo simulation is performed implementing over twenty-five parameters to determine the probability of damage in case of a rear-end collision. From the results, a simplified method is designed to assess the probability of damage to the wagon’s structure. This method uses a newly found relation to determine the absorbed energy at the impact interface in case of a collision. Furthermore, the simplified method reduced the calculation to five parameters and an analytically solvable Limit State function. A first-order reliability method shows that the impact velocity is the single most important parameter in determining the probability of damage. The simplified method also allows for site-specific values and gives insight into the system and the most important parameters. It is recommended that this method, to determine damage to especially tank wagons in rear-end collisions, is used to improve the existing calculation method for determining the risk affecting External Safety. Civil Engineering | Hydraulic Engineerin
Synchronisation along quantum trajectories of three coupled VdP oscillators
No full textSynchronisation is the remarkable phenomenon of in-phase movement of coupled oscillators during a prolonged period of time, which even occurs when these have different natural frequencies. This property is used in many fields like physics, biology and chemistry, to model various system behaviours, for instance: circadian rhythms in the chemistry of the eyes \cite{Rompala2007}. \newline\noindent This thesis focuses on synchronisation and entanglement in systems consisting of quantum Van der Pol oscillators. After looking at the exemplary properties of the classical VdP oscillator, it follows the methods of \cite{EshaqiSani2020} to explore the behaviour of two coupled QVdPOs, quantum Van der Pol oscillators, using Monte Carlo simulations for trajectories of this system. The system is then expanded to three-oscillator systems with all-to-all and chain coupling. The validity of the extension of the properties found in two QVdPOs in \cite{EshaqiSani2020} with regard to synchronisation and entanglement is tested. Does an Arnold tongue, the region of parameters for which a system shows synchronisation, still exist and if so has its shape changed? Do synchronisation and strong entanglement still show a positive correlation? \newline\noindent Simulations of the 2-oscillator system gave results which were just slightly different from those obtained in\cite{EshaqiSani2020}, validating the occurrence of synchronisation within the Arnold tongue and showing a positive correlation between synchronisation and entanglement of the system. Both the 3-oscillator systems showed synchronisation as well in their respective Arnold tongues, which were increasingly smaller for the all-to-all coupled and the chain coupled system when compared to the 2-oscillator system. Overall, the amount of synchronisation, shown in three oscillators was very close to the amount shown in two oscillators when strongly coupled and just a little less for weak coupling. The correlation between synchronisation and strong entanglement was also found for three oscillators, though for weaker coupling the chain coupled system showed a little more entanglement than before.Applied Mathematics | Applied Physic
Classification Algorithm for Early Detection of Atrial Fibrillation: The Development of a Supervised Learning Method Using Photoplethysmography Signals for an ARM Processor
No full textAtrial fibrillation (AF) is the most common type of cardiac arrhythmia occurring in around 0.5% of the world population. AF is characterized by the rapid and irregular beating of the atrial chambers of the heart, which can cause lead to strokes and other heart-failures. To prevent these consequences the early detection of AF is paramount. Using photoplethysmography (PPG) heart activity can be measured from which the inter-beat-interval (IBI), the time between heart beats, can be estimated. Using data collected by a PPG sensor the aim is to classify the heart activity as either AF or Normal Sinus Rhythm in real time using machine learning and collect the outcomes for further analysis by medical professionals. For this a classification method is suggested which is able to be implemented on an ARM based processor. Using a Support Vector Machine and 10 features derived from the IBI's and the PPG signal this algorithm achieves the following accuracy metrics: balanced accuracy = 0.853, sensitivity = 0.850, specificity = 0.856 and Matthews Correlation Coefficient (MCC) = 0.643. Compared to similar studies these results are substandard and should be improved
The Role of Repression in the Incidence of Ironic Errors
No full textThe role of repression in the incidence of ironic errors was investigated on a golf task. Coping styles of novice golfers were determined using measures of cognitive anxiety and physiological arousal. Following baseline putts, participants (n = 58) performed a competition putt with the opportunity to win UK£50 (approx. US$100). Before completing the competition putt participants were instructed to “land the ball on the target, but be particularly careful not to over-shoot the target.” The distance the ball traveled past the hole formed the measure of ironic effects. Probing of the coping style × condition interaction, F(2, 41) = 6.53, p < .005, revealed that only the repressors incurred a significant increase in ironic error for the competition putt. This suggests that the act of repressing anxiety has a detrimental performance effect
Resonant cavity method for broadband dielectric measurements
No full textThe project investigates the Cavity Perturbation Method (CRM) and design of a coaxial resonator covering a wide frequency band from 2.5 to 11.5 GHz. Using the published analyses for coaxial cavities, original theoretical analysis of Cavity Perturbation Method for TEM coaxial cavity was carried out by the author. Using similar approach, the H(_011) cylindrical cavity was analyzed. The deliberate objective of the method was to produce a wide band technique since there are none available at present. The method then examines the possibility of employing the coaxial cavity as an important and necessary measuring device for dielectric measurements using CPM. It was the aim in the investigations to state clearly what assumptions were made so that the accuracy of the calculated results could be assessed. A new measurement technique, using a Sweep Generator/ Spectrum Analyzer Assembly (SG/SA) was introduced. The technique is based on very precise measurements of the changes in cavity Q and its resonant frequency, displayed on Spectrum Analyzer, when the test sample of the material is inserted. Because the main objective of the project is the method of measurements, the assessment of its validity and accuracy was fully discussed. Measurements were carried out on fifteen materials of various types of ceramics over the frequency range of interest. These materials were used mainly for the assessment of the validity and accuracy of the new Sweep Generator/Spectrum Analyzer Assembly technique, and also a test of the capability of the constructed broadband coaxial cavity to be used for dielectric measurements. The well-known Bridge and Q-meter methods, were employed initially to provide the low frequency values for the materials as reference. An attempt has also been made to justify the validity of the universal law on those materials. Additional work not directly related to the main project has been carried out on Curie temperature measurements. The object was to develop a simple and reliable method using the Gouy balance technique
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