Digital Commons Network^™

Phase-Variation Microwave Resonator For Highly Sensitive Dynamic Sensing, Chen Zhu, Rex E. Gerald, Jie Huang

Electrical and Computer Engineering Faculty Research & Creative Works

High-precision dynamic sensing is critical in fields, such as industrial automation, structural health monitoring, and environmental sensing, where real-time responses to minuscule changes can prevent system failures or optimize performance. In this work, we introduce and demonstrate a phase-variation coaxial cable resonator (CCR) as a highly sensitive sensor for dynamic sensing applications. As a proof of concept, a prototype device based on a custom-designed CCR is thoroughly investigated for dynamic displacement measurements, as displacement is a fundamental quantity essential to numerous applications. The sensor consists of two components: a static CCR device and a movable conducting plate. As the conducting …

Discrimination Of Temperature And Strain By Characterizing Two Femtosecond Laser-Written Coincident Sapphire Fiber Bragg Gratings For Harsh Environment Applications, Farhan Mumtaz, Bohong Zhang, Koustav Dey, Jeffrey D. Smith, Ronald J. O'Malley, Jie Huang

Electrical and Computer Engineering Faculty Research & Creative Works

In this study, two co-incident sapphire fiber Bragg gratings (SFBGs) were successfully inscribed utilizing a femtosecond (fs) laser to achieve a high fringe contrast interferogram. These two SFBGs employ a unique configuration, one parallel to the center axis, called p-SFBG, and the other forming an angle from the center-axis, called a-SFBG, allowing for simultaneous strain and temperature measurements with low crosstalk. As a proof of concept, p-SFBG and a-SFBG using line-by-line method are characterized, which are shorter in length (i.e., 1.5 mm), producing reflectivity of ~3dB. This effort demonstrates the use of two coincident SFBGs forming an angle of 2.29° …

Simultaneous Measurement Of Early-Stage Corrosion And Strain Levels In Steel Rebar Based On Graphene Oxide-Coated Ncf-Fbg Fiber Optic Sensor, Fujian Tang, Baihe Qu, Hong Nan Li, Jie Huang

Electrical and Computer Engineering Faculty Research & Creative Works

Rebar corrosion significantly reduces the lifespan of reinforced concrete structures. The value of rebar strain, especially for some key structural components, indicates the safety margin of structures. In this study, a graphene oxide (GO) coated no-core fiber-fiber Bragg grating (NCF-FBG) fiber optic sensor is proposed for simultaneously measuring strain values and early-stage corrosion of steel rebar for the first time. The impact of GO coating thickness on the monitoring sensitivity is considered. A setup was manufactured to simultaneously perform tension, optical, and corrosion tests. The strain was applied up to 1200 μϵ. The rebar corrosion was assessed using electrochemical method …

Explainable And Safety Aware Deep Reinforcement Learning-Based Control Of Nonlinear Discrete-Time Systems Using Neural Network Gradient Decomposition, Behzad Farzanegan, S. Jagannathan

Electrical and Computer Engineering Faculty Research & Creative Works

This paper presents an explainable deep-reinforcement learning (DRL)-based safety-aware optimal adaptive tracking (SOAT) scheme for a class of nonlinear discrete-time (DT) affine systems subject to state inequality constraints. The DRL-based SOAT utilizes a multilayer neural network (MNN)-based actor-critic to estimate the cost function and optimal policy while the MNN update laws are tuned both using the singular value decomposition (SVD) of activation function gradient in order to mitigate the vanishing gradient issue and safety-aware Bellman error at each layer. An approximate safety-aware optimal policy is developed using Karush–Kuhn–Tucker (KKT) conditions by incorporating the higher-order control barrier function (HOCBF) into the …

Safe Optimal Control Of Quadrotor Formations Using Multilayer Neural Networks And Continual Learning, Ehsan Soleimani, Irfan Ahmad Ganie, S. Jagannathan

Electrical and Computer Engineering Faculty Research & Creative Works

This article presents an integral reinforcement learning-based optimal formation tracking scheme for multiple quadrotors unmanned aerial vehicles (QUAVs) experiencing nonlinear coupled dynamics and subject to constraints. We use multilayer neural networks (MNN) within an actor-critic framework where the MNN weights are tuned using singular value decomposition (SVD) of the activation function gradient to approximate optimal control policy via backstepping. Additionally, barrier Lyapunov functions (BLF) are introduced to ensure set invariance, thereby maintaining the quadrotors within a defined safety space due to constraints. A novel weight update law for each layer is derived using the HJB approximation error and control input …

An Extensive Analysis Of Match-Tracking Methods For Artmap, Niklas M. Melton, Leonardo Enzo Brito Da Silva, Donald C. Wunsch

Electrical and Computer Engineering Faculty Research & Creative Works

This paper identifies and studies five match-tracking (MT) methods in the adaptive resonance theory (ART) literature and conducts a detailed comparative analysis of these in ARTMAP applications. We focus on model performance for each MT method with respect to time and space efficiency as well as classification accuracy. Experimental results indicate that one MT variant, used in ARTMAP applications for the first time in this work, provides significant improvements in computational efficiency: depending on the ARTMAP variant, it was able to achieve up to one order of magnitude reduction in both time and space requirements, albeit with a compromise in …

Large-Range And High-Sensitivity Displacement Sensing Based On Extrinsic Fabry-Perot Interferometer Assisted Microwave Photonic Filter, Shiyu Li, Ruimin Jie, Osamah Alsalman, Jie Huang, Chen Zhu

Electrical and Computer Engineering Faculty Research & Creative Works

Displacement is a pivotal physical parameter, and advancements in displacement sensor technology have enabled the creation of a diverse array of physical and mechanical sensors through seamless integration with mechanical transducers. In this study, we introduce a displacement sensing technique leveraging an extrinsic Fabry-Perot interferometer (EFPI) assisted microwave photonic filter. By translating displacement-induced variations in the EFPI's optical reflection into peak frequency shifts within its frequency response, we achieve large-dynamic-range displacement measurements with outstanding signal quality and demodulation ease. Proof-of-concept demonstrations showcase a substantial 5 mm range with a remarkable sensitivity of 1.148 GHz/mm, achieved using a basic single-mode fiber-based …

Young Feminist Organizing Fanzine—To Defend, To Insist And To Resist From The Territory, Feministas Jóvenes Organizadas

Adolescents and Young People

No abstract provided.

Growing The Abriendo Oportunidades® Ecosystem: Equipping Young Mentors With Skills And Resources To Expand Girl-Centered Programming In Belize, Population Council

Adolescents and Young People

Building on the success of the Abriendo Oportunidades^® (AO^®) program in Guatemala, in 2014 Population Council Guatemala (PC-Guatemala) and Toledo Mayan Women’s Council established the Toledo Adolescent Girls program (TAG), a safe space initiative that equipped young Indigenous girls and female mentors with life skills. The project demonstrated that neighboring countries are interested in expanding the AO model, and that the Council can successfully support programmatic adaptation to meet the needs of other Indigenous communities in Mesoamerica. This was achieved by introducing age-segmented groups, prioritizing transportation funding for mentors and supervisors, and continuing to tailor to local …

Growing The Abriendo Oportunidades® Ecosystem: Spotlight On Escuela De Oportunidades, Population Council

Adolescents and Young People

Developed in partnership with the Office of the Vice President in 2021, Escuela de Oportunidades is a national internship program that intentionally invests in young female Indigenous professionals to increase their visibility in governance structures. Through a combination of mentorship, training, and practical experience, Escuela de Oportunidades has successfully facilitated the entry of Indigenous Guatemalan women into government institutions, enhancing gender and ethnic inclusivity in public service. This brief is part of the Abriendo Oportunidades^® Legacy Series, celebrating and highlighting 20 years of impactful program implementation.

Growing The Abriendo Oportunidades® Ecosystem: Sowing Seeds Of Change Within Government Systems, Population Council

Adolescents and Young People

Population Council-Guatemala (PC-Guatemala) is supporting and shaping a movement led by young Indigenous leaders to expand inclusive education and civic participation opportunities. Through mechanisms such as professional internships, school re-integration programs, and other government collaborations, young Indigenous women are building the knowledge, skills, and relationships to lead community development efforts and inform inclusive national policies. This brief is part of the Abriendo Oportunidades^® Legacy Series, celebrating and highlighting 20 years of impactful program implementation.

Growing The Abriendo Oportunidades® Ecosystem: Spotlight On Mentor Networks, Population Council

Adolescents and Young People

The emergence of REDMI Aq’ab’al and Na’leb’ak ONG, two civil society networks of young Indigenous women, represents a monumental evolution of the Abriendo Oportunidades^® (AO^®) program. As AO^® successfully supported young female Indigenous mentors to increase their autonomy, community visibility, and professional skills, the formation and growth of these independent networks now promotes a larger movement of sustainable, responsive, and community-led social progress. It also provides a new platform for mentors to be recognized and credited for their work, even after they have “graduated” from direct participation in AO^®. This brief is part of …

The Social Life Of The Abriendo Oportunidades® Program In Guatemala: Three Decades Of Enabling Community And Civic Spaces For Indigenous Girls And Women, Population Council

Adolescents and Young People

Since 2004, Abriendo Oportunidades^® (Opening Opportunities, AO) has emerged as a gender transformative social program to support Indigenous girls and young women in Guatemala’s post-war context. Following an evidence-based, community-anchored approach, AO began as a program and has evolved into a social movement. AO has continuously demonstrated its impact in reducing girls’ exposure to gender-based violence and pioneered alternative education through utilizing mentors as tutors. Over time, AO has successfully reached more than 25,000 Indigenous girls and adolescents across 500+ rural Guatemala communities and built a pathway of professional opportunities for the young women who lead the program. AO …

Girls First Fund: External Evaluation—Endline Evaluation Report, Brian Medina Carranza, Neelanjana Pandey, Angel Del Valle, Fatima Zahra

Adolescents and Young People

The Population Council is leading an evaluation of programs funded by the Girls First Fund (GFF) in the Dominican Republic (DR), India, and Niger. These three countries were chosen to maximize geographic, social, cultural, and economic diversity across contexts, but common to all three is the continued persistence of child marriage and the presence of collective efforts to eliminate it. The broader goal of this evaluation is to: 1) demonstrate proof of concept for the impact of  GFF-supported programs; 2) examine key outcomes of interest to the GFF and the community-based organizations that it funds, including education, child marriage, and …

Front Matter

Lewis & Clark Law Review

Front Matter contains Table of Contents, Masthead, and faculty advisors for Lewis & Clark Law Review Vol. 28, No. 4, 2025.

Embrace The Suck: Why States And Localities Should Use Property Rights To Fix Broken Housing Voucher Programs, Elizabeth Elia

Lewis & Clark Law Review

The largest federal affordable housing program is an income supplement program called Housing Choice Vouchers (formerly Section 8). When a low-income person has a housing voucher, they find and rent privately owned, market-rate housing. The tenant pays a portion of the rent, and the federal Department of Housing and Urban Development pays the rest of the rent directly to the landlord. Unfortunately, most voucher-holders end up renting in high-poverty neighborhoods and more than one in three tenants who receive a housing voucher are unable to use it before it expires. This is because most private landlords choose not to rent …

The Public Trust Doctrine And Lake Abert: Saving Oregon’S Only Salt Lake, Joseph Arzt

Lewis & Clark Law Review

The public trust doctrine creates a relationship between states and their citizens under which the states are entrusted with protecting natural resources for public use. Though Oregon recognizes the public trust doctrine, recent decisions from Oregon’s Supreme Court have displaced and fractured this doctrine, leaving the current legal landscape surrounding the public trust doctrine in disarray. This Note focuses on Lake Abert, Oregon’s only saline lake, which in recent years, due to mismanagement and neglect, has undergone dramatic ecological shifts. By looking at arguments rooted in Oregon’s Constitution, as well as judicial approaches taken in neighboring states, this Note examines …

The Alchemy Of Sin: Turning Tobacco Sin Tax Revenue Into Public Health Gold, Audre L. Sylvester

Lewis & Clark Law Review

This Note proposes a reallocation of tobacco excise tax revenue towards health and education programs related to tobacco cessation. Revenue collected from federal excise taxes on tobacco products is currently used to support the daily and long-term operations of the United States while tobacco cessation and education programs remain underfunded and underutilized. This Note examines the history of these “sin taxes,” their modern-day function, and the issues that arise from the current allocation of sin tax revenue to support the argument that revenue from federal sin taxes on tobacco products should be exclusively allocated to a dedicated federal trust fund …

Admitting Science: Problems With Current Admissibility Standards, William O'Donohue, Sneha Gupta

Lewis & Clark Law Review

Attorneys use expert testimony to advance legal positions in courtrooms. Because expert testimony can have tremendous influence over judges and juries, it is admitted only if it meets specific admissibility standards, i.e., Frye and Daubert. These standards provide different admissibility criteria, have been adopted by distinct sets of jurisdictions, and, we argue, are of questionable validity. These standards are attempts to ensure that only knowledge is admissible and are, then, essentially an epistemic matter. Science serves as a proxy for knowledge because science is the epistemic process that has been successful at generating knowledge. However, both epistemology and the philosophy …

2025 Finance Calendar, Amanda Christensen, Melanie Jewkes, Andrea Schmutz, Vincenza Vicari-Bentley, Kelan Combe, Rochelle Allen, Lauren Olsen, Jenny Weller

All Current Publications

The 2025 Financial Calendar outlines small monthly steps to improve your finances over the year.

Occult Abdominal Trauma Screening In The Evaluation Of Suspected Child Physical Abuse., Tagrid M. Ruiz-Maldonado, Joanne N. Wood, Antoinette L. Laskey, Christopher S. Greeley, Angela Bachim, Daniel M. Lindberg, James Anderst, John Melville, Carmen Coombs, Nancy S. Harper, Lori Frasier, Farah W. Brink, Caitlin E. Crumm, Kristine A. Campbell

Manuscripts, Articles, Book Chapters and Other Papers

BACKGROUND AND OBJECTIVES: Occult abdominal trauma (OAT) screening with transaminases, followed by abdominal computed tomography (CT) for transaminase values greater than 80 IU/L, has been recommended in cases of suspected physical abuse. This study aimed to evaluate case characteristics associated with OAT evaluation and determine OAT prevalence in these children.

METHODS: Injured children aged younger than 60 months undergoing Child Abuse Pediatrics (CAP) consultation for suspected physical abuse from February 2021 to May 2023 were identified in CAPNET, a multicenter research network. Children with symptoms or signs of intra-abdominal injury were excluded. We identified case characteristics associated with transaminase screening …

Personalized Persuasion In The Digital Age: A Data-Driven Approach To Effective Communication, Annye Braca

Doctoral

This thesis investigates the potential of Machine Learning (ML) to personalize persuasive marketing messages. It explores the identification of individuals receptive to specific persuasion techniques based on their psychometric profiles. By developing ML models that incorporate these profiles, the thesis aims to predict the impact of tailored messages and improve the effectiveness of marketing communication.

Development Of Holographic Optical Elements For Application In Wound Healing Monitoring, Pamela Stoeva

Doctoral

Growing global healthcare challenges, including the increasing prevalence of chronic wounds, necessitate the development of cost-effective, reusable, and readily accessible sensors for real-time wound monitoring. Such devices could extend basic healthcare to remote areas and support long-term space missions by facilitating on-the-spot wound assessment. Sensors that utilise Holographic Optical Elements (HOEs) are promising candidates due to their diverse sensing capabilities, advantageous physical properties (e.g., lightweight and flexibility), and suitability for mass manufacturing. The fundamental biochemical processes associated with wound healing are typically related to parameters such as oxygen levels, pH, temperature, and lactate concentration. Realtime quantification of these parameters enables …

Highly Sensitive Diffractive Optical Structures For Detection Of Volatile Organic Compounds, Faolan Radford Mcgovern

Doctoral

From aerospace to agriculture, sensors play a fundamental role in many aspects of modern life. Sensors form an integral part of the complex systems and devices required for the continued functioning and development of services and industries across society. The use of sensors is paramount in areas affecting human health, one such area being the monitoring of indoor air quality, in particular the detection of volatile organic compounds (VOCs). Human contact with VOCs has been associated with many health complications, including skin and eye irritation, cardiovascular damage, and cancers. Optical, electrical, gravimetric, and chemical sensors have been developed for VOC …

Plasmonic Down-Shifting Layers For Cylindrical Solar Concentrators, Kenneth Coldrick

Doctoral

The efficiency of photovoltaics (PVs) and photo-thermal (PT) systems is hindered by spectral mismatches and low thermal conductivity. A promising solution to address these issues can be the use of luminescent down-shifting (LDS) layers. This involves the incorporation of luminophores into solid or liquid layers that will act as spectral beam splitters (SBSs). In solid polymers, they form luminescent solar concentrators (LSCs), while in liquids, they act as working fluids and SBS for hybrid photovoltaic-photothermal (PVT) systems. This thesis will examine the energy conversion in both solid and liquid configurations through experimental, simulation, and economic analyses. An open-source model that …

Capacity Building In The Irish Brewing And Distilling Sector For Raw Materials Utilisation, By-Products Management, And Environmental Impact Assessment, Ekene C. Umego

Doctoral

The Irish brewing and distilling sector has shown a consistent increase in number, production output, sales, and export value in the last decade. This has implications for raw materials requirements, assessment, and by-products management for the sustainability of the sector. As a result, the main aim of this research study was to evaluate the status of raw materials use and assessment within the Irish brewing and distilling sector, explore by-products management options and valorisation initiatives, and analyse the environmental impact of Irish whiskey production. The first approach was a survey study to collect data on major raw material inputs use …

Favorite Foods Participant Packet, Caitlin Wollack

UNH Cooperative Extension

No abstract provided.

4-H Animal Sharing Or Borrowing Form 2025, Hannah Majewski

UNH Cooperative Extension

No abstract provided.

2026 4-H National Conference Application, Kristen Landau, Kristen Lyons

UNH Cooperative Extension

No abstract provided.

Long-Term Health-Related Quality Of Life In Kawasaki Disease-Related Coronary Artery Aneurysm: A Large Single-Center Assessment In Nanjing, China, Yun Zhou, Mei Chen, Wenting Gao, Yu Chen, Ying Meng

The Texas Heart Institute Journal

BACKGROUND: The impact of coronary artery aneurysms (CAAs) caused by Kawasaki disease (KD) on long-term health-related quality of life (HRQOL) in children has not been well documented.

METHODS: This study investigated long-term HRQOL in a large sample of children diagnosed with KD-related CAAs. A case-control, retrospective study included 66 patients with KD-related CAAs. A total of 98 hospitalized patients were matched as controls based on age and sex: 49 patients were allocated to a group with pneumonia and 49 patients were allocated to a group with arterio-arterial fistula. Both child-reported and parent-proxy-reported Pediatric Quality of Life Inventory surveys were collected. …