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Glacial Landforms East of Mount Meylixueshan in Yunnan Province, China, and its Implication to the Mountain Uplift during the Late Pleistocene and Holocene
Full text linkGlacial landforms in the valleys of the Shenchenbao Glacier and the Lailogoru Glacier located on the eastern side of Mt. Meylixueshan (6,740 m), the highest mountain in Yunnan Province, China, were investigated in the field. The Shenchenbao Glacier terminates currently at 3,570 m and in the valley below, four terminal moraines and one pair of grand lateral moraines are recognized. The lowest terminal moraine is located at 3,260 m, about 2.5 km down from the present glacier snout. The snout of the Lilogoru Glacier lies at 2,650 m, about 900 m lower than the Shenchenbao Glacier. Located in front of the Lilogoru Glacier are two sets of terminal and lateral moraines. The elevation of the lowest terminal moraine is 2,360 m, about 2 km from the present glacier snout. The lowest lateral moraines are indurated and consolidated enough to stand as nearly vertical walls
KSU Concert Choirs and Lost Mountain Middle School Present: I\u27m Gonna Sing!
Full text linkKSU Concert Choirs and Lost Mountain Middle School Present: I\u27m Gonna Sing!https://digitalcommons.kennesaw.edu/musicprograms/2857/thumbnail.jp
Control of Foodborne Pathogen Shigella dysenteriae with Bacteriophage
No full textShigella dysenteriae is an important foodborne bacterial pathogen. It can cause a severe illness known as dysentery, a type of shigellosis with high mortality (up to 20%). The symptoms include diarrhea (often bloody and mucoid), stomach cramps, fever, and hemolytic-uremic syndrome which can be fatal. S. dysenteriae has a low infectious dose. It is easily transmitted through contaminated food and from person to anoperson. Despite numerous efforts for prevention and control, shigellosis continues to be an important cause of acute diarrhea and dysentery worldwide, particularly in Asia and Africa. The development of an effective control is urgently needed to decrease its global impact. Recently, bacteriophages (phages) have emerged as safe and promising biocontrol agents against bacterial pathogens. Phages are viruses that infect only bacteria. They do not replicate in foods unless their bacterial hosts are present. In addition, phages do not alter food properties and nutritional value. A novel Shigella phage has been isolated. The phage is genus-specific. It is able to infect S. dysenteriae and a few other Shigella species. The objective of this study was to evaluate the effectiveness of the phage infection at 37°C against S. dysenteriae in beef broth as a model food system (representing meats) at 3 different multiplicity of infections (MOIs). The results from this study showed that regardless of the initial MOI (1, 10, or 100), the phage infection killed off the host cells within 3 hr, resulting in 5-log (99.999%) reduction in cell concentration, compared to the control. These results clearly showed that the phage infection is highly effective to control S. dysenteriae in the model food system, suggesting that the phage has high potential to be used as a biocontrol agent against Shigella dysenteriae in foods
Exploring Roman Health and Social Status in Crete: Dental Evidence from Ierapetra\u27s Graveyards
No full textThis research project aims to compare dental pathologies between excavations of Roman graves from Ierapetra, Crete in Greece. This study is part of a larger project led by Dr. Susan Kirkpatrick Smith. I compared the data from a newer excavation to previous results from nearby graves. The goal was to see if there was any difference in the rate of dental caries and linear enamel hypoplasia (LEH) to determine if there was potentially a difference in economic status or dietary health. Much work has been done on the Minoan civilization in Crete, but little is known about the Roman occupation of the territory besides the major battles and what Roman governor handled the area. The day-to-day life of the Cretan people is unknown, as many common folks throughout history sadly are; this research will create new insights into their lives. This collection was from a rescue excavation of a Roman-era graveyard. All of the teeth in the collection were identified by myself, besides a group that was associated with a singular known individual. After identification, the teeth were rated for wear and the presence of caries or linear enamel hypoplasias. Following this, the data was then compared to the previously studied teeth via the chi-square test to determine if that was a statistical difference between the two populations. Results will allow us to see if variation in grave type might have been a signal of social status
Acute Effects of Contraction Speed during Motor Imagery on Corticospinal and Muscle Function Responses
No full textBACKGROUND: Motor Imagery (MI) is the imagination of a movement without physical muscle contraction. Acute MI has been shown to increase strength and corticospinal excitability, but few studies have placed emphasis on the rate of torque development (RTD) during MI or as an outcome following MI. RTD refers to how quickly skeletal muscle generates torque and is associated with mobility in aging and clinical populations. MI has implications for these populations where traditional strength training is not possible, so it is important to determine its effect on RTD. Corticospinal responses to MI are muscle and task specific, but it is unclear if the speed of imagined muscle contractions affects neural responses. This study aims to determine the acute effects of fast and slow imagined contractions on corticospinal responses and RTD. METHODS: Eighteen young (18-30 yrs), healthy subjects will complete 4 laboratory visits in randomized order, including a familiarization session, control, and 2 MI conditions. During MI conditions, subjects will imagine 2 sets of 25 repetitions of either fast (i.e., increase torque as fast as possible) or slow (i.e., 3 seconds to peak torque) isometric elbow flexions. Before and after each condition, single pulses will be delivered over the primary motor cortex using transcranial magnetic stimulation to measure motor-evoked potential amplitude and the resulting silent period duration for the bicep brachii to quantify changes in corticospinal excitability and inhibition, respectively. Rapid, maximal voluntary isometric contractions will be used to measure changes in peak torque, RTD, and rate of electromyography rise. Two-way repeated measures ANOVAs will be used to analyze outcomes. ANTICIPATED RESULTS: Compared to control, we expect both MI conditions to acutely increase corticospinal excitability, peak torque, and RTD while reducing corticospinal inhibition, but we expect greater changes in these outcomes following fast MI
Time-Dependent Nucleation Rate in Undoped Silicate Glass
No full textUndoped Lithium disilicate was employed to investigate the time-dependent nucleation rate. The total number of nuclei was determined using the differential thermal analysis (DTA) method. During heat treatment for shorter durations, ranging from 1 to 10 hours, the number of nuclei rapidly increased, reaching what was previously perceived as a steady state nucleation rate. However, upon extending the heat treatment to longer durations, data suggests steady-state nucleation is achieved at a much longer time than previously believed
Study Habits and Engagement among Students in a Large General Education Hybrid Course
No full textThe purpose of this project is to assess the study habits and learning behaviors of students in a large enrollment hybrid gen ed social science class. This course enrolls high numbers of first-year students, which also helps identify shifts among new college students as they transition to college-level learning. As a hybrid course, technology and online learning tools are essential to student success, so this project explores not only students\u27 in-class behaviors (i.e., attendance and seat choice), but also engagement with the course Learning Management System and additional digital tools. Employing an anonymous quantitative survey, this project surveys the students enrolled in the class in which I am an undergraduate teaching assistant and explores student-reported data relevant to their academic effort tied to this course. The survey for this project will be submitted for IRB approval and is planned to be administered after the third-course exam (early November). This is a convenience sample and participation is voluntary and anonymous. Findings will not be known until closer to the Symposium data, but basic statistics and correlates in the data will be explored to query student-reported information about their behaviors and perceptions of likely course grade outcomes. This project will help identify trends among newer KSU students and provide insight into effective strategies to maximize student success and mentorshi
Design and Analysis of Wind Speeds and Pressure on the Inlet of the CFM56
No full textThe CFM56-7B, a high-bypass turbofan engine developed by CFM International in collaboration with General Electric and Safran Aircraft Engines, represents a cornerstone in modern aviation propulsion, extensively powering aircraft models like the Airbus A320, Boeing 737 NG, and Embraer E-Jet families. The objective of the research is to identify opportunities to enhance the performance and efficiency of the CFM56-7B engine. With the intention of modifying the nacelle’s profile to increase pressure inside the inlet, an examination of wind speeds and pressure on the CFM56-7B engine\u27s inlet is presented. The efficiency and performance of the engine can be increased by optimizing the airflow through the nacelle, which can result in less fuel being used and fewer pollutants expelled. The size and shape of the nacelle are modified in this research. The goal is to determine the optimal combination of these parameters that will help optimize the air pressure before the compressor. This will help increase inlet and compressor efficiency and overall engine performance
Design and Development of Bat-Inspired Unmanned Aerial System for Mapping and Navigation
No full textThis project aims to develop a sonar-based Unmanned Aerial System (UAS) that mimics bat behavior using ultrasonic sound to form a map around the aircraft to navigate through spaces and avoid obstacles. Utilizing a quadcopter design, two stacked carbon fiber plates form the central frame with each of the four booms extending from its corners. Its foremost compartment resembles the head of a long-eared bat, and a speaker that sits inside the mouth to project ultra-sonic frequencies that are received by microphones that sit in the ears. By incorporating speakers and microphones, a more cost-effective method to navigating and mapping is employed as opposed to using more common and expensive equipment integrated into UAVs such as cameras and sensors. The aircraft uses custom 3D-printed parts fabricated using a Stratasys F170 Fused Deposition Modeling (FDM) 3D printer such as the Electronic-Speed-Controller (ESC) housings, the battery box, the sliding door, and the bat head. Each part is designed inside SOLIDWORKS to meet mission requirements by incorporating modularity, accommodating for electronics, minimizing weight, and accounting for clearances and aerodynamics. A Finite Element Analysis (FEA) was conducted to verify structural integrity
Battery State of Charge Estimation using Neural Network Aided Kalman Filter
No full textPrecise estimation of Battery state of charge (SOC) poses a major challenge in managing and operating electric vehicles (EVs). This is mainly due to its complex behaviour that has a nonlinear dependency on parameters like temperature and SOC. Despite numerous SOC estimation approaches, their accuracy can be enhanced which is crucial for ensuring an optimized energy consumption. This research aims to increase the SOC estimation accuracy by investigating a neural network aided Kalman filter (KalmanNet), for the first time, to estimate battery SOC in EVs. The results demonstrate lower estimation error compared to well-known conventional filters used for SOC estimation. Specifically, the proposed approach is compared to the extended Kalman filter (EKF) and sigma-point Kalman filter (SPKF)