Digital Commons Network^™

Study Of Phase Change Cooling Heat Transfer Characteristics Of High Power Charging Connectors, Huimin Chen, Xianglong Li, Xiulan Liu, Shuguang Gao, Zhiguo Qu, Chunlin Niu

Journal of Electric Power Science and Technology

Direct current‑based high‑power charging (DC‑HPC) technology can significantly reduce the charging time of electric vehicles and therefore alleviates concerns about charging duration. However, the rapid temperature increase of charging connectors under high voltage and current poses a challenge, impacting their lifespan and safety. This paper proposes a phase change cooling technology for the high‑power super‑charging connectors. Through a comparative numerical analysis of the single‑phase and phase change cooling performance, the influence of coolant type, flow rate and casing thickness on the thermal behavior of the charging cable with active cooling are investigated. The results indicate that the cable temperature can …

Prediction Of Substation Maintenance And Repair Costs With Improved Gm (1,1) Model, Zhiwei Li, Yiran Wang, Zhaoyang Zhang, Wei Wang, Zhao Fang, Liping Sun, Xin Tang

Journal of Electric Power Science and Technology

Aiming at the fluctuation of maintenance and repair costs in substation life cycle cost, a traditional grey model and an improved grey model are adopted respectively, to forecast the maintenance and repair costs of a substation in the next 3 years in order to optimize cost allocation strategy. Simulation results show that the prediction accuracy of both models is one grade; while both the average relative error and the posterior error ratio of the improved model are lower than those of the traditional one. The prediction accuracy of the improved model is hence higher than that of the traditional one, …

Research On Zero Sequence Current Control Strategy For Suppressing Internal Oscillation Of Dc Mmc Send By Wind Power, Yue Lan, Junfang Wang, Yuyu Dou, Xinyu Wang, Yi Yang, Rongshun Liu

Journal of Electric Power Science and Technology

In this paper, the oscillation mode of wind power through DC transmission system is analyzed, and the interaction mechanism between the circulating current zero sequence component of MMC system internal oscillation and capacitor voltage is revealed. The mechanism of the internal oscillation of MMC system caused by the interaction between the zero sequence component of the circulating current and the capacitor voltage of MMC is revealed. The dynamic relationship between the total energy stored by the equivalent capacitance of each arm of the MMC system and the zero-sequence current is constructed. The differential modulus and the common modulus of the …

Pmsm Control Of Three‑Phase Inverter With Variable Switching Frequency And Dc Bus Variable Voltage, Hong Yang, Fan Yang, Ru Yang

Journal of Electric Power Science and Technology

To address the shortcomings of low DC voltage utilization and high insulated gate bipolar transistors (IGBT) loss in the three-phase voltage source inverter applied by the space vector pulse width modulation (SVPWM) drive method with constant switching frequency and rated DC bus voltage, permanent magnet synchronous motor (PMSM) and output cycle-based IGBT loss control model is established, based on which the optimal switching frequency and DC bus voltage for output cycle based IGBT loss are obtained by applying the dwarf mongoose optimization algorithm with the output current quality as the constraint and the switching frequency and DC bus voltage as …

Impedance Modeling And Stability Analysis Of Single‑Phase Grid‑Connected Inverter Considering Frequency Coupling, Ning Xiao, Ci Tang, Xuyi Kuang, Min Luo, Jiayi Wang

Journal of Electric Power Science and Technology

With the permeability increase of renewable energy, the interaction between power electronic converters and power grid causes oscillation accidents frequently. In order to study the characteristics of oscillation induced by grid-connected new energy sources, this paper explains the mechanism that a single-frequency disturbance voltage as input to a single-phase inverter considering the PLL effect leads to double-frequency disturbance current as output, through the relationship of real number signal and complex vector. The mechanism of frequency coupling in weak power grid is further explained. The models of self-admittance and mutual-admittance are established, and the equivalent output admittance of inverter is then …

Fault Diagnosis Of Inverter Based On Dcm‑Pca And Ga‑Bp Neural Network, Jingyao Huang, Yu Cheng, Yatian Li

Journal of Electric Power Science and Technology

Aiming at the open-circuit fault of the photovoltaic grid-connected three-phase voltage-type inverter,.a fault diagnosis method combining deep cascade mode-principal component analysis (DCM-PCA) and genetic algorithm-optimized BP(GA-BP) neural network is proposed. Firstly, the open-circuit fault of the inverter is analyzed and simulated, the three-phase current is determined as the fault signal, and 22 types of fault states are selected as the diagnosis objects, and the fault features are extracted through the deep cascade model with sparse representation classification as the basic operation unit, the DCM fault features are stratified based on the characteristics of hierarchical learning. The t-SNE method is used …

Partial Discharge Signal Denoising Based On Ceemdan‑Tqwt Method For Power Transformers, Haikun Shang, Ranzhe Zhang, Tao Huang, Wei Lin, Zixuan Zhao

Journal of Electric Power Science and Technology

In response to the phenomena of significant oscillations and incomplete noise reduction when dealing with partial discharge signals using traditional methods, a combined approach based on complete ensemble empirical mode decomposition with adaptive noise (CEEMDAN) and tunable Q-factor wavelet transform (TQWT) is adopted to denoise the PD signals. Firstly, the CEEMDAN is employed to decompose the noisy transformer PD signals into multiple intrinsic mode functions (IMF), and the correlation coefficient is utilized to assess the correlation between the IMF components and the original signal. Those with weak correlations are considered inferior IMFs. They are decomposed using TQWT. Energy proportion and …

Masthead

University of Miami Law Review

No abstract provided.

Understanding Cyber Risk: Unpacking And Responding To Cyber Threats Facing The Public And Private Sectors, Lawrence J. Trautman, Scott Shackelford, Brian Elzweig, Peter Ormerod

University of Miami Law Review

Cyberattacks, data breaches, and ransomware continue to pose major threats to businesses, governments, and health and educational institutions worldwide. Ongoing successful instances of cybercrime involve sophisticated attacks from diverse sources such as organized crime syndicates, actors engaged in industrial espionage, nation-states, and even lone wolf actors having relatively few resources. Technological innovation continues to outpace the ability of U.S. law to keep pace, though other jurisdictions including the European Union have been more proactive. Nation-state and international criminal group ransomware attacks continue; Sony’s systems were hacked by a ransomware group; MGM Resorts disclosed that recovery from their September 2023 hack …

Planning Committee Report On Understaffed Programs, Planning Committee

Planning Committee

No abstract provided.

The Effect Of Continuous Glucose Monitoring On Glucose Control And Re-Hospitalizations In Type Ii Diabetes Mellitus Patients, Susan Ferguson

The Eleanor Mann School of Nursing Student Works

Purpose: This Program Development and Evaluation project was designed to improve the management of patients with type II diabetes mellitus through the implementation of a combined in-patient discharge protocol and outpatient continuous glucose monitoring protocol follow-up plan in a diabetes clinic following discharge from a rural-based acute facility hospitalization.

Method: This quasi-experimental project was based on Rosswurm and Larrabee's Model for Change framework. Outcome measures analyzed type II diabetes mellitus patients to assess the effects of a continuous glucose monitoring discharge protocol on pre- and post-glycemic levels, rehospitalizations, and patient (n=2) and provider knowledge (n=4) obtainment.

Results: In a comparison …

Cedarville Magazine, Spring 2024: The Value Of A Cedarville Degree, Cedarville University

Cedarville Magazine

No abstract provided.

Effect Of The Mediterranean Diet On Type 2 Diabetes In Teens/Young Adults, Megan Herrera, Taylor Folwark, Christine Marti-Milward, Madison Benjamin

Department of Nutrition Student Projects

Type 2 Diabetes (T2D) is a chronic condition affecting roughly 422 million people worldwide. Diabetes is a metabolic condition that occurs when there are elevated blood sugar levels for long periods of time which could lead to damage within the heart, kidneys, blood vessels, eyes, and nervous system. T2D occurs due to the body’s resistance to insulin or insufficient production of insulin. T2D is prevalent among adults, but as time continues, a larger number of teens/young adults are being diagnosed with this condition. As research advances, there is evidence that indicates pharmacological treatments can be used to positively affect T2D. …

The Bear Essentials, April 22 2024, Dmacc Student Life

The Bear Essentials

Bear Essentials is an online newsletter published by the Student Activities Council of Des Moines Area Community College. The newsletter was established in early 2020 when DMACC closed its facilities due to the coronavirus pandemic. The newsletter covers topics such as upcoming virtual activities and events, college resources, and community service opportunities. When asked about the origins of the newsletter, Student Activities Advisor Erin Smith said, "We wanted students to know they were not alone, the entire DMACC Community was coming together to help support one another in any way possible."

Modeling And Stability Analysis Of Three‑Phase Voltage Source Vienna Rectifier, Jianing Fan, Hui Ma, Qi He, Liping Fan, Xiaoyan Ma

Journal of Electric Power Science and Technology

Based on the VIENNA rectifier front-end circuit of the electric vehicle DC charging pile, a small signal method is proposed to model the VIENNA rectifier. This method derives the mathematical model of the VIENNA rectifier in the dq0 coordinate system by employing local linearization techniques and state-space averaging method. It obtains the relevant transfer function matrix, namely the linearized small-signal model of the VIENNA rectifier, which is then utilized for controller design. Subsequently, the voltage loop and current loop are designed separately using frequency domain methods. The effects of various parameters on the system are analyzed in detail using frequency …

Refined Meteorological Risk Modeling Of Transmission Lines And Online Warning And Defense Strategies Of Meteorological Disasters, Ming Lu, Zhiming Guo, Gaojun Meng, Sikun Yuan, Yun Liang

Journal of Electric Power Science and Technology

Meteorological factors play an important role in the stable operation of transmission lines, which should be considered in risk assessment. This paper presents a method of transmission line meteorological risk early warning and protection. Considering the temporal and spatial power generation forecasting, equipment health and reliability assessment, probabilistic load forecasting and other aspects, a refined meteorological risk model is established, and a new risk measurement standard is proposed based on Meteorological hazards, grid vulnerability and post disaster recovery cost. In addition, aiming at the restoration of load interruption and the alleviation of power congestion, the online warning and defense strategy …

A Review Of Demand Response Capability Assessment Based On Cpss Perspective, Kairui Zhang, Hao Ming, Ciwei Gao

Journal of Electric Power Science and Technology

The combination of cyber-physical-social systems and demand response assessment is reviewed. First, the history and framework of cyber-physical systems are analyzed. Then, summaries are provided for the existing research on demand response, including the significance, classification, and evaluation methods of demand response potential assessment, as well as the data sources for demand response capability assessment, including questionnaire surveys and operational data collection. In terms of the combination of cyber-physical-social systems and demand response, the physical domain, information domain and social domain foundation of demand response are analyzed respectively, and the corresponding modeling methods and research contents are introduced. Finally, prospects …

Unique K3 Surfaces With Purely Non-Symplectic Automorphism: Insights From Weighted Projective Spaceunique K3 Surfaces With Purely Non-Symplectic Automorphism:\\Insights From Weighted Projective Space, Elizabeth Melville

Theses and Dissertations

K3 surfaces have garnered attention across various fields, from optics and dynamics to high energy physics, making them a subject of extensive study for many decades. Recent work by mathematicians, including Brandhorst [1], has focused on non-symplectic automorphisms, aiming to categorize K3 surfaces that admit such automorphisms. Brandhorst made a list of unique K3 surfaces with purely non-symplectic automorphisms and established specific criteria for a K3 surface to be isomorphic to one on his list. This thesis aims to provide an alternative representation of select K3 surfaces from Brandhorst's list. While Brandhorst predominantly characterizes these surfaces as elliptic K3 surfaces, …

The Materiality Of The Soul In Plutarch's Moralia, Caleb Cole Deppermann

Theses and Dissertations

This thesis examines Plutarch's vague comments about the materiality of the soul in Moralia. My contention is that, despite suggestions to the contrary, Plutarch aligned with Plato in thinking about the soul as immaterial. I argue that a deeper understanding of Plutarch's relationship to Plato as well as the Stoics and Epicureans of his time shed light on his otherwise ambiguous passages. The end result will be (1) a more secure understanding of Plutarch's position on the materiality of the soul and (2) an improved ability to appreciate Plutarch's playful and vivid language as he describes immaterial souls with material …

"The First Fruits Of A Woman's Wit": Reclaiming The Childbirth Metaphor In Aemilia Lanyer's Salve Deus Rex Judaeorum, Carolyn Mae Shakespear

Theses and Dissertations

The childbirth metaphor adopts imagery from female bodies carrying and delivering children to describe the effort and relationship of a poet to his/her poem. This was a commonly used trope in the renaissance, particularly by male authors. This thesis examines the way early modern woman poet, Aemilia Lanyer uses the childbirth metaphor in her poem, Salve Deus Rex Judaeorum. Lanyer ultimately considers not only the physical realities of childbirth in her use of the metaphor, but also the emotional, social, and theological consequences. By doing so, I argue that Lanyer reclaims the metaphor from her male contemporaries in order to …

Poe’S Theory Of The Short Story And Hybridity In East Asian Short Fiction: Considering Mori Ogai’S “Maihime” And Su Manshu’S “Suizanji”, Anthony Michael Wood

Theses and Dissertations

This thesis considers how Mori Ōgai’s “Maihime” (1890) and Su Manshu’s “Suizanji” (1916) conform and differ from Edgar Allen Poe’s theory of the short story. It then considers Ōgai’s and Su’s reading of the short stories and East Asian short fiction as well as Ōgai’s definition of the short story to consider why these works of short fiction differ from Poe’s definition, concluding that they are hybrid works, which seek to combine the short story and East Asian short fiction.

Global Coffee Production, Payton Herres

Student Papers in Local and Global Regional Economies

This study aims to provide a comprehensive understanding of the many factors that influence global coffee production, with a particular focus on weather conditions, land area, labor force, and human capital. By exploring these multifaceted aspects, this research aims to provide valuable insights for stakeholders in the coffee industry, policymakers, and researchers. This research explores patterns, calculations, and causal relationships that shape the dynamics of coffee production worldwide through a rigorous analysis of weather variables, including temperature and rainfall, along with assessments of land area, labor dynamics, and human capital. Furthermore, the research aims to illuminate the complex interplay between …

Impact Of Baby Friendly On Exclusive Breastfeeding: Befriending Baby Friendly, Constance Z. Townson

MSN Capstone Projects

Unless you have personally breastfed a newborn baby or tried to help a struggling breastfeeding mother, chances are you would think breastfeeding is not only natural but comes easily. Breastfeeding is indeed a natural progression following delivery; however, various things can play a role in the success of a mother and newborn baby trying to breastfeed. Issues such as feeding position, waking a sleepy newborn, mothers not recognizing newborn hunger cues, a full day of well-meaning visitors impeding skin-to-skin time with mom, or delayed feedings are just a handful. Sometimes, breastfeeding is so difficult that moms who want to breastfeed …

Mind Over Matter: Is Entering Stem Dependent On Self-Perceptions? A Pedagogical Review, Arin Dorsey

Biomedical Sciences Honors Theses

By 2032, STEM occupations are expected to increase by 10.8% while non-STEM occupations are projected to increase only by 2.3%. However, STEM recruiters and employers struggle to adequately fill STEM positions and retain employees, despite workforce availability, leading to a gap in the STEM workforce. This gap has been exacerbated by a plethora of issues such as: student self-perceptions (science identity, self-efficacy, and sense of belonging), systemic biases, and a lack of career readiness. Social Cognitive Career Theory (SCCT) suggests ones’ career choices come from interactions between multiple elements, including environmental, behavioral, and personal factors, and provides a valuable lens …

A Quality Improvement Initiative To Bridge The Gap Of Pharmacology Knowledge Among Associate Degree Nursing Students, Maria Lepage

Nursing Doctoral Projects (DNP)

Abstract

The purpose of this project was to determine if a formal pharmacology course in associate degree nursing (ADN) programs would increase the new graduate registered nurses’ (NGRN’s) knowledge of pharmacology content in an effort to decrease medication errors in practice. Disparities exist among nursing ADN program curriculums and the delivery of pharmacology content. Some ADN programs consist of a formal pharmacology course while others disperse the information throughout the program, often omitting pertinent content for students to apply the basic pharmacology knowledge to patient care. Despite the differences in nursing program curriculum, all NGRNs are expected and held to …

Correlates Of Anti-Asexual Bias In The Bible Belt, Lauren Robinson

Honors College Theses

Many studies focus on LGBTQIA+ individuals in the United States, but there are fewer studies about asexuality, especially in the Bible Belt: a collection of states in the Southeast with populations having increased rates of conservatism, religiosity, and expectations of traditional gender and sexuality norms (Baunach et al, 2009). The purpose of the study was to examine anti-asexual bias and its relation to different variables in college-age students who attended college and/or lived in the Bible Belt. It was hypothesized political positioning, ethnic and racial background, religiosity/spirituality, adherence to social norms, traditional vs egalitarian gender roles, and pathologizing of asexual …

Comprehensive Guidance For The Prevention Of Periprosthetic Joint Infection After Total Joint Arthroplasty And Pitfalls In The Prevention, Javad Parvizi, Yonghan Cha, Emanuele Chisari, Kangbaek Kim, Kyung-Hoi Koo

Rothman Institute Faculty Papers

Total joint arthroplasty (TJA) is a surgical procedure, in which parts of damaged joints are removed and replaced with a prosthesis. The main indication of TJA is osteoarthritis, and the volume of TJA is rising annually along with the increase of aged population. Hip and knee are the most common joints, in which TJAs are performed. The TJA prosthesis is composed of metal, plastic, or ceramic device. Even though TJA is the most successful treatment for end-stage osteoarthritis, it is associated with various complications, and periprosthetic joint infection (PJI) is the most serious complication after TJA. With the increasing volume …

Developing A Sql Injection Exploitation Tool With Natural Language Generation, Kate Isabelle Boekweg

Theses and Dissertations

Websites are a popular tool in our modern world, used daily by many companies and individuals. However, they are also rife with vulnerabilities, including SQL injection (SQLI) vulnerabilities. SQLI attacks can lead to significant damage to the data stored within web applications and their databases. Due to the dangers posed by these attacks, many countermeasures have been researched and implemented to protect websites against this threat. Various tools have been developed to enhance the process of detecting SQLI vulnerabilities and active SQLI attacks. Many of these tools have integrated machine learning technologies, aiming to improve their efficiency and effectiveness. Penetration …

The Role Of Caloric Intake On Achilles Tendon Health In Pre-Professional Ballet Dancers, Annie G. Smedley

Theses and Dissertations

Background: Achilles tendinopathy is a common and debilitating condition among female ballet dancers due to the large repetitive loading forces placed on their Achilles tendons during rehearsals and performances. Tendon health problems in females are exacerbated by a lack of understanding about how energy availability influences tendons. Ballet dancers, as aesthetic athletes, are vulnerable to low energy availability and can enter a spectrum disorder, relative energy deficiency in sport, that consists of low energy availability (with or without disordered eating), menstrual cycle dysfunction, and low bone mineral density (BMD). Aims: 1) To investigate the relationship between insufficient caloric intake and …

Intouch Week Of April 22, 2024, New York Medical College

InTouch

• Erika Berman Rosenzweig, M.D., to Lead NYMC Department of Pediatrics
• Distinguished Speakers Will Deliver Remarks to the Graduating Class of 2024
• D.P.T. Class of 2026 Celebrates the Start of Clinicals with the White Coat Ceremony
• Division of Physical Therapy Hosts 20^th Annual Doctoral Project Presentation Day
• NYMC Graduates Reunite at the Alumni Neurology Reunion
• NYMC Students’ Altruism Shines with Woodfield Cottage Youth Initiative
• Faculty Spotlight: Rebecca A. McAteer Martin, M.D. '08, Shares her Mission in Healing