Digital Commons Network^™

Effect Of Occupational Welding Fume Exposure On Hemostatic & Inflammatory Blood Parameters And Cardiovascular Risks On Welders And Non-Welders In Confined Space: A Longitudinal Study, Ning Li

Chulalongkorn University Theses and Dissertations (Chula ETD)

Occupational welding fumes contains varies of toxic metal particles and may affect cardiovascular system like the Particulate Matters (PM). The hypothetical mechanisms of welding fume toxicity center on oxidative stress and inflammatory, similar as the mechanisms that link PM2.5 and cardiovascular diseases (CVDs). The popular mechanisms on toxicity of welding fumes agreed that PM was associated with increased WBC and neutrophil counts, and increased WBC counts lead to higher Cardiovascular risks and Coronary heart disease risks.Urine Mn and Cr level in the welder group was significantly higher than the non-welder group (Mn: 0.96 VS 0.22 ug/g creatinine, p < 0.001; Cr: 0.63 VS 0.22 ug/g creatinine, p < 0.01). One third of the non-welders were in the high metal-exposed group. When all the participants were divided by occupation type, two times measurements revealed that Hct, WBC and Eosinophil indices of the welder groups were significantly higher (all p < 0.05). Linear regression models showed that, comparing to non-welders, welding could cause alterations to most hemostatic indices majorly by effecting an increase: Hct (β = 0.015, p = 0.007), WBC (β = 0.047, p = 0.033), Eosinophil ratio % (β = 0.345, p = 0.001). When all the participants were divided by metal level groups, there was bidirectional relationship between urine Mn level and WBC count in the linear regression models ((β = - 0.049, p = 0.045 and β = 0.059, p = 0.007, separately for starting and ending point). The study participants (both welders and non-welders) had an average systolic BP in the “high normal” range (Welders: 125.21 ± 11.23 mmHg for systolic BP Non-welders: mean = 126.33 ± 11.41 mmHg for systolic BP). Systolic blood pressure of the welder group increased significantly higher than the non-welder group after one year follow up (welder group VS non-welder: 4.13 ± 11.76 VS - 0.15 ± 6.60 mmHg, p = 0.037).

Family And Household Characteristics And Violent Disciplinary Practices Towards The Children In Myanmar: An Analysis Of 2015-2016 Myanmar Demographic And Health Survey, Nyan Linn

Chulalongkorn University Theses and Dissertations (Chula ETD)

Background: Violence against children is one of the challenging public health problems. Violent disciplines not only affect negative health impacts but also are against children's right. However, those violent methods are still widespread across the countries, especially within the family. For prevention and control, it is required to clearly understand the country-specific information of violent child disciplines. In Myanmar, there are very few studies focusing on this area. This study was aimed to investigate the prevalence and factors associated with violent disciplines against children in Myanmar.Methodology: This study was a secondary data analysis of nationally representative 2015-2016 Myanmar Demographic and …

Neuroprotective Effect Of Passiflora Edulissims Against Amyloid Beta-Induced Neurotoxicity, Shuqin Cao

Chulalongkorn University Theses and Dissertations (Chula ETD)

Alzheimer’s disease (AD) is a common and devastating disease characterized by pathological aggregations of beta-amyloid (Aβ) plaques extracellularly, and Tau tangles intracellularly. While our understandings of the aetiologies of AD have greatly expanded over the decades, there is no drug available to stop disease progression. This study involves two parts. First, we demonstrate the potential of P. edulis pericarp (PP) extract in protecting against Aβ-mediated neurotoxicity in mammalian cells and Caenorhabditis elegans models of AD. We show PP protects against memory deficit, neuronal loss, and promotes longevity in the Aβ model of AD via stimulation of mitophagy, the selective cellular …

Development Of Asiatic Acid-Loaded Solid Lipid Nanoparticles For Nose To Brain Delivery: Ex Vivo And In Vivo Evaluation, Tissana Rojanaratha

Chulalongkorn University Theses and Dissertations (Chula ETD)

Asiatic acid (AA) has neuroprotective properties potential for prevention and treatment of Alzheimer’s disease. Natural waxes with various ratios of tween 80 and span 80 or soybean lecithin were formulated to obtain AA-loaded solid lipid nanoparticles (AA-SLN) in order to improve direct nose to brain transport. Optimal AA-SLN had particle size below 200 nm with uniform size distribution as confirmed by transmission electron microscope (TEM) results and zeta potential of nearly -30 mV indicating low risk on particle aggregation. Formulation with rice bran wax, tween80 and soybean lecithin (AA-RwS100) showed the highest drug content and entrapment efficiency of >98%. Differential …

Melanogenesis-Stimulating Isoflavonoids From Dalbergia Parviflora, Ponsawan Netcharoensirisuk

Chulalongkorn University Theses and Dissertations (Chula ETD)

Melanin, a cellular pigment, found in skin, hair and eyes is produced by melanocytes located at the basal layer of epidermis. Abnormal melanin production causes various pigmentation diseases. Low melanin content or dysfunction of melanogenesis not only decreases self-confidence and the quality of life but also enhances skin damage by external stimuli. Until now, there has been no reported remedy that possesses high efficacy and safety profile for hypopigmentation treatment in human. Development of novel darkening compounds from natural resources has recently become of an interest. In this study, the potent melanin-stimulating agents were screened from 45 compounds isolated from …

Study Of Self-Assembled Hyaluronic Acid Based Nanogel As Solubilization And Stabilization System For Asiatic Acid, Yu Yu Win

Chulalongkorn University Theses and Dissertations (Chula ETD)

Asiatic acid (AA), natural triterpene found in Centalla asiatica, possesses polypharmacological properties that can contribute to the treatment and prophylaxis of various diseases. However, its hydrophobic nature and rapid metabolic rate lead to poor bioavailability. The aim of this research is to study nanogel system from hyaluronic acid (HA) for solubilization and stability enhancement of AA. Poly(N-isopropylacrylamide) (pNIPAM) was conjugated onto HA using carbodiimide reaction followed by 1H NMR characterization. pNIPAM-grafted HA (HA-pNIPAM) nanogels were prepared with three concentrations of polymer, 0.1%, 0.15% and 0.25% w/v in water by sonication method. AA was loaded into the nanogel by incubation method. …

Supplementing Pochonia Chlamydosporia With Botanicals For Management Of Meloidogyne Incognita Infesting Chickpea, Amir Khan, Manar Fawzi Bani Mfarrej, Moh Tariq, Mohd Asif, Hera Nadeem, Mansoor Ahmad Siddiqui, Mohamed Hashem, Saad Alamri, Faheem Ahmad

All Works

Root-knot nematodes pose a severe threat to worldwide agricultural development. Due to the high toxicity of chemical nematicides, eco-friendly control strategies against root-knot nematodes need to be established. A pot and in vitro experiment were performed to estimate nematicidal potential of Pochonia chlamydosporia. P. chlamydosporia was used alone or in combination with two botanicals for controlling Meloidogyne incognita in chickpea. The laboratory assessment was performed with four prepared concentrations (S, S/2, S/10, S/25) of fungal inoculum of P. chlamydosporia against egg hatching and second-stage juvenile's mortality of M. incognita. All four concentrations reduced egg hatching and increased mortality of J2s. …

Process Mining Analytics For Industry 4.0 With Graph Signal Processing, Georgios Drakopoulos, Eleanna Kafeza, Phivos Mylonas, Spyros Sioutas

All Works

Process mining is the art and science of (semi)automatically generating business processes from a large number of logs coming from potentially heterogeneous systems. With the recent advent of Industry 4.0 analog enterprise environments such as floor shops and long supply chains are bound to full digitization. In this context interest in process mining has been invigorated. Multilayer graphs constitute a broad class of combinatorial objects for representing, among others, business processes in a natural and intuitive way. Specifically the concepts of state and transition, central to the majority of existing approaches, are inherent in these graphs and coupled with both …

Cancer Incidence, Mortality, Years Of Life Lost, Years Lived With Disability, And Disability-Adjusted Life Years For 29 Cancer Groups From 2010 To 2019: A Systematic Analysis For The Global Burden Of Disease Study 2019, Jonathan M. Kocarnik, Global Burden Of Disease 2019 Cancer Collaboration, Ali Artaman

All Works

Importance: The Global Burden of Diseases, Injuries, and Risk Factors Study 2019 (GBD 2019) provided systematic estimates of incidence, morbidity, and mortality to inform local and international efforts toward reducing cancer burden. Objective: To estimate cancer burden and trends globally for 204 countries and territories and by Sociodemographic Index (SDI) quintiles from 2010 to 2019. Evidence Review: The GBD 2019 estimation methods were used to describe cancer incidence, mortality, years lived with disability, years of life lost, and disability-adjusted life years (DALYs) in 2019 and over the past decade. Estimates are also provided by quintiles of the SDI, a composite …

Gym Power Generation System: Exercise Bike Generator, Richard Beck, Cedric Mannie

Electrical and Computer Engineering

What?

• Design and build an exercise bike that produces power!

Why?

• Nobody likes pollution from burning fossil fuels.
• We need more renewable power sources.
• Energy from exercise is usually wasted.

Considerations:

• The bike needs to have adjustable resistance.
• The power produced needs to be usable.
• The system needs to be safe & user-friendly.

Pawtomatic Pet Door, James Cosgrove, Austin Hillyard

Electrical and Computer Engineering

• Pet doors aren’t secure
• Pet doors don’t allow the user to restrict access to specific animals
• Pet doors that do lock/close must be locked/closed and reopened manually

Garden Helper Robot (Ghr), Tye Foster, Matthew Jacques, Joshua Mecham

Electrical and Computer Engineering

Engineer Joshua Mecham's grandfather Jerry Hansen loves to garden; however, Jerry's arthritis prevents him from pursuing his passion.

There had to be some way to incorporate an ordinary hose box into a mobile gardening bench. This solution would simultaneously water Jerry’s plants as well as provide a seat Jerry could use instead of getting on his hands and knees.

For this reason, the GHR was designed with people like Jerry in mind that want to continue their hobbies despite disabilities/sickness/age troubles.

The Module Tinkering Vehicle (Motiv), Steve Brezenski

Electrical and Computer Engineering

MoTiV is a remote-controlled car kit hat a user can assemble and add additional components to as desired.

The goal for MoTiV is to provide an introduction to electronics that:

• Appeals to a diverse audience, both experienced and novice
• Limits frustration on the part of the learner by working reliably and consistently
• Allows for new functionality to be added as desired with a method for easily updating device software

Infant Earmuff System, Beth Powell

Electrical and Computer Engineering

The Infant Earmuff System allows caretakers to prevent hearing damage in infants when wearing the device.

• Infants have smaller ear canals and are therefore more susceptible to hearing damage than adults
• Hearing damage in infants is permanent but infants are bad at communicating if the noise level is too loud.
• The Infant Earmuff System allows caretakers to understand the level of noise an infant is hearing and whether that level is dangerous.

Real Life Jrpg, Jacob Wilson

Electrical and Computer Engineering

JRPG is a very popular video game genre, it’s turn based battle system allows the player to create interesting strategies impossible to find in real time games.

The goal of Real Life JRPG is to bring that experience away from the TV. Fight a dragon by actually swinging a sword.

Up to 3 players will work together to defeat the dragon, attacking it will Lower it’s health points and if the Dragons health points reach 0 the players win. But the Dragon will retaliate and if all players lose their health points, the dragon win.

Making Loud Noises Quiet, Logan Voigt, Nicholas Williams

Electrical and Computer Engineering

Guns are loud. Putting on ear protection takes time. Hunters need to listen for animals, so they can not wear ear protection constantly. Hunters have limited time to react when they see their target. They do not have time to put on ear protection. The Shot Silencer protects hunters’ hearing by actively noise cancelling the sound of the gunshot.

Sdgpu - Fpga Linux Gpu, Usu Department Of Electrical And Computer Engineering

Electrical and Computer Engineering

• Video output and accelerated rendering are an increasing important need for personal computers.
• FPGAs provide a hardware platform for reconfigurable hardware acceleration.
• This project involves designing and building a hardware platform, FPGA logic, and Linux driver stack for video output and accelerated rendering.
• Targeting a PCIe add-in card form factor with 1080p 60 Hz output via HMDI means the system works out of the box with nearly all modern hardware.
• An extensible software and HDL design serves to provide a platform for computational and graphical acceleration.

Mahanoy Area School District V. B.L.: The Court Protects Student Social Media But Leaves Unanswered Questions, David L. Hudson Jr.

Law Faculty Scholarship

In Mahanoy Area School District v. B.L.: The Court Protects Student Social Media but Leaves Unanswered Questions, published in the Cato Supreme Court Review, David L. Hudson Jr. analyzes the U.S. Supreme Court’s landmark decision addressing the scope of public schools’ authority over off-campus student speech on social media. Situating Mahanoy within the Court’s broader K–12 student speech jurisprudence—from Barnette and Tinker to Fraser, Hazelwood, and Morse—the Article explains how the Court declined to adopt a categorical rule excluding off-campus speech from regulation while nevertheless ruling in favor of the student. The majority recognized diminished school …

Card Barn, Taylor Nielson, Nicholas Wallace

Electrical and Computer Engineering

Create an automatic card storage system.

• The user first provides a stack of cards to be inventoried, and then allows the system to scan each card and store the scanned cards in a storage bin for later retrieval.
• The user can query the system for what cards are stored in the system, and the system will inform the user of which bin the desired card is in.

Enxor Open-Source Logic Analyzer, Matthew Crump

Electrical and Computer Engineering

Professional grade logic analyzers can cost a fortune, putting these devices out of reach from students and electronic hobbyists

• Enxor is an open-source FPGA project allowing anyone to use or customize it
• Enxor can be used to monitor external signals or added as a submodule in a larger FPGA allowing internal signal testing
• No device specific modules allowing Enxor to run on any FPGA
• User interface works on Windows and Linux

Modular Engine Control System (Mecs), Christian Hogan

Electrical and Computer Engineering

There are two purposes of this project:

• Develop an open source platform for designing electronic engine control systems
• Demonstrate the platform by designing an electronic control system for a small gasoline powered engine

Demonstration Objectives:

• Modify a small gasoline engine to run on electronic control
• Write a VHDL library
• Construct all components and wiring in a durable fashion

Code Learning Laptop, Max Gesullo

Electrical and Computer Engineering

• Learning basic coding skills on your own is difficult. You need to worry about the language, coding programs, and instructional content
• The above barriers to entry keep people from starting to learn coding who would otherwise enjoy it
• This project is designed to consolidate all the resources needed to learn basic coding concepts into one easy to use device

Plugsy Gardening System, Brandon Deakin, Andrew Williams, Daniel Beckett

Electrical and Computer Engineering

The Planting and Landscaping Utility Gardening System for You (PLUGSY) is an automated garden system. The PLUGSY performs many gardening tasks, including planting, watering, and weeding the garden.

The purpose of the PLUGSY is to make gardening more accessible and enjoyable. This will help remove some of the barriers that people experience when first getting into gardening. These include barriers such as limited time, burnout, and lack of gardening knowledge. The PLUGSY helps solve all of these barriers by performing the most time consuming and tedious tasks for the user. In this way, the PLUGSY will be able to help …

Covid-19 And Corporate Social Responsibility: Business Responses To The Pandemic In The Inland Northwest, Jacob H. Rooksby

Law Faculty Publications

The novel coronavirus upended the world beginning in early spring of 2020. As travel ground to a halt, and governments issued stay-at-home orders, the impact on commerce was immediate and has proven to be lasting. Employees accustomed to working in offices and job sites were told to stay home. Certain industries received permission to have so-called “essential” personnel continue their labor in person, but for many employers the reality they faced was not so simple: learn to adapt to the new environment or succumb to the new environment. ...

Coming To Terms: Using Contract Theory To Understand The Detroit Water Shutoffs, Marissa Jackson Sow

Law Faculty Publications

After the City of Detroit underwent financial takeover and filed the largest municipal bankruptcy in American history in 2013, the city’s emergency manager encouraged mass water shutoffs as a way of making the city’s water utility a more attractive asset for sale—and for privatization—by ridding the water department of its association with bad debt. The sale never took place, but the water shutoff, too, became the largest ever in American history, with over 141,000 homes subjected to water disconnections over a period of over six years. The governor of the State of Michigan ordered that the shutoffs be temporarily suspended …

Catalog 2021-2022, University Of North Florida

UNF Course Catalogs

No abstract provided.

Adolescent Obesity Case Study, Rachel Salvitti

All Student-Created Educational Resources

This handout shows some easy to digest information regarding adolescent obesity. It is targeted towards girls and suggests what they should or should not include in their daily habits to reduce their risk or continued development of obesity. The information presented is based off of MyPlate recommendations, as well as other studies of dietary interventions to improve health of adolescents suffering from or at risk of obesity.

Salad With Clams: Prey Choice Of An Intentionally Carnivorous Turtle, Kayleigh R. Erazmus, Luca Luiselli, Russell L. Burke

Biology Faculty Publications

Prey choice is the non-random foraging and consumption of prey species by their predators, and is therefore the basis for studies of topics as diverse as quantifying food webs, predator–prey relationships, and optimal-foraging models. Malaclemys terrapin (Diamond-back Terrapin) is a diet generalist with a large geographic distribution: the US Atlantic and Gulf coasts from Massachusetts to Texas. Individual terrapins have relatively small home ranges and feed primarily on local mollusc species. In feeding trials with 1 prey species and 2 prey species, wild-caught terrapins from New York readily consumed Mya arenaria (Soft-shelled Clam) and Geukensia demissa (Atlantic Ribbed Mussel), preferring …

Flight And Dietary Antioxidants Influence Antioxidant Expression And Activity In A Migratory Bird, Kristen J. Demoranville, Wales A. Carter, Barbara J. Pierce, Scott R. Mcwilliams

Biology Faculty Publications

Ecologically-relevant factors such as exercise and diet quality can directly influence how physiological systems work including those involved in maintaining oxidative balance; however, to our knowledge, no studies to date have focused on how such factors directly affect expression of key components of the endogenous antioxidant system (i.e., transcription factors, select antioxidant genes, and corresponding antioxidant enzymes) in several metabolically active tissues of a migratory songbird. We conducted a 3-factor experiment that tested the following hypotheses: (H1) Daily flying over several weeks increases the expression of transcription factors NRF2 and PPARs as well as endogenous antioxidant genes (i.e., CAT, SOD1, …

A Complex Interplay Between Balancing Selection And Introgression Maintains A Genus-Wide Alternative Life History Strategy, Kalle Tunstrom, Alyssa Woronik, Joseph J. Hanly, Pasi Rastas, Anton Chichvarkhin, Andrew D. Warren, Akito Kawahara, Sean D. Schoville, Vincent Ficarrotta, Adam H. Porter, Ward B. Watt, Arnaud Martin, Christopher W. Wheat

Biology Faculty Publications

Alternative life-history strategies (ALHS) are genetic polymorphisms generating phenotypes differing in life histories that generally arise due to metabolic resource allocation tradeoffs. Although ALHS are often be limited to a single sex or populations of a species, they can, in rare cases, be found among several species across a genus. In the butterfly genus Colias, at least a third of the species have a female limited ALHS called Alba. While many females develop brightly pigmented wings, Alba females reallocate nitrogen resources used in pigment synthesis to reproductive development, producing white-winged, more fecund females. Whether this ALHS evolved once or …