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Articles 3001 - 3030 of 1518977
Full-Text Articles in Entire DC Network
Improving Post-Thrombolysis Assessment And Documentation Compliance In Acute Ischemic Stroke Care, Kafayat Abba, Charmaine Brereton, Maria Alte, Lysta Cadore, Damali Bernadotte, Nydia White, Katherine Demelis
Improving Post-Thrombolysis Assessment And Documentation Compliance In Acute Ischemic Stroke Care, Kafayat Abba, Charmaine Brereton, Maria Alte, Lysta Cadore, Damali Bernadotte, Nydia White, Katherine Demelis
International Nursing Research Congress (INRC)
Background and Purpose: Stroke is the second leading cause of death and the third leading cause of death and disability combined worldwide. Intravenous thrombolysis (IVT) with recombinant tissue plasminogen activator (tPA) or Tenecteplase (TNK) remains the standard treatment for ischemic stroke. While life-saving, IVT carries risks such as symptomatic intracranial hemorrhage and orolingual angioedema, occurring in 1.3–5.1% of patients (Rodgers et al., 2021). Nurses play a pivotal role in post-IVT care (You Zhang et al., 2024), where timely neurological monitoring is essential for early complication detection (Faigle et al., 2020). Guidelines mandate assessments every 15 minutes for 2 hours, every …
The Picaso Trial: Studying Aya Chronic Illness Self-Management Using A Noncategorical Approach, Sharron L. Docherty, Gary Maslow, Mclean Pollock, Susan Silva, Erin Denio, Lakaya Craig, Remi Misiewicz
The Picaso Trial: Studying Aya Chronic Illness Self-Management Using A Noncategorical Approach, Sharron L. Docherty, Gary Maslow, Mclean Pollock, Susan Silva, Erin Denio, Lakaya Craig, Remi Misiewicz
International Nursing Research Congress (INRC)
Background: Adolescents and young adults (AYA) with childhood-onset chronic conditions often struggle during the transition from pediatric to adult healthcare and from being a child living with a chronic condition to an adult who effectively manages their chronic condition. Despite shared developmental, psychosocial, and healthcare transition challenges, most research is condition-specific, limiting generalizability and overlooking shared self-management needs (1-3). The PiCASO study evaluated a peer coaching intervention to improve self-management and patient activation among AYA during this critical transition and demonstrated the feasibility and impact of a noncategorical approach.
Methods: A randomized controlled trial was conducted in which 222 AYA …
Lifestyle Intervention: Effects On Glycemic Control And Medication Reduction In Type Ii Diabetes, Karlen E. Luthy, Sydney Smith, Christine Rae Platt, Janelle L. B. Macintosh, Neil E. Peterson, Janessa Johnson
Lifestyle Intervention: Effects On Glycemic Control And Medication Reduction In Type Ii Diabetes, Karlen E. Luthy, Sydney Smith, Christine Rae Platt, Janelle L. B. Macintosh, Neil E. Peterson, Janessa Johnson
International Nursing Research Congress (INRC)
Background: Diabetes Mellitus Type II (DMII) is a condition that affects millions of people every year and, while preventable, remains one of the top causes of death and disability in the United States. Typical treatment for DMII is focused on using pharmacological measures to lower and maintain hemoglobin A1C in a healthy range. Providers in a family practice clinic established a lifestyle change program to assist patients to reduce their A1C while also reducing the number of diabetic medications they take. The program was intended to improve metabolic health without relying solely on pharmacotherapy. The program encourages a low carb …
Growth With New And Old Technologies, Bernardo S. C. Ribeiro
Growth With New And Old Technologies, Bernardo S. C. Ribeiro
Cowles Foundation Discussion Papers
This paper proposes a semi-endogenous growth theory that incorporates technology vintages and the endogenous evolution of multiple technological paradigms through innovation. It provides a characterization of both balanced growth equilibrium and transitional dynamics in an environment where new technologies continuously emerge. From a positive perspective, the model rationalizes two distinct empirical patterns. Using two centuries of US patent data, I first document that the age profile of patents has a pronounced hump shape: most contemporary patents build upon technologies that are between 50 and 100 years old. Second, this age profile has remained stable throughout the past century. From a …
Consumer Behavior In The Social Media Ecosystem: A Scoping Review Of Influential Factors, Huda Fadhil Gatea
Consumer Behavior In The Social Media Ecosystem: A Scoping Review Of Influential Factors, Huda Fadhil Gatea
Muthanna Journal of Administrative and Economics Sciences
The rapid expansion of social media has fundamentally transformed the ways consumers search for information, interact with brands, and make purchasing decisions. This study provides a structured synthesis of the literature on consumer behavior in the social media ecosystem using a Scoping Review approach aligned with the PRISMA-ScR framework. The review aimed to map the main research streams, identify dominant thematic categories, and clarify the conceptual directions shaping this field. A total of 31 studies published between 2011 and 2025 were included in the final review following a multi-stage screening process involving identification, screening, eligibility assessment, and final inclusion. The …
Snap Into Action: Standardizing Nursing Neurologic Assessments In Pediatric Oncology, Katherine Smith, Jessica Mcwhorter, Cara Gliddon, Barbara Poloskey, Sanjiv Mehta, Kimberly Digerolamo
Snap Into Action: Standardizing Nursing Neurologic Assessments In Pediatric Oncology, Katherine Smith, Jessica Mcwhorter, Cara Gliddon, Barbara Poloskey, Sanjiv Mehta, Kimberly Digerolamo
International Nursing Research Congress (INRC)
Background: Nursing neurologic assessments are essential for timely recognition and escalation of changes in neurologic status (1-3). However, nursing neurologic assessments lacked standardization on a 51-bed pediatric oncology and bone marrow transplant unit. Approximately 40% of emergency transfers (4) over three years were related to neurologic changes and nurses lacked confidence in performing neurologic assessments.
Purpose: The purpose of this quality improvement project was to standardize the process for nursing neurologic assessments, with aims to: 1) increase nurses’ confidence in performing neurologic assessments and 2) decrease emergency transfers related to changes in neurologic status.
Methods: The Serial Neurologic Assessment in …
A Language We Built Together: A Physician Assistant’S Reflection On A Renal Transplant, Oviya Mahendran, Sampathkumar Sakthi Selvakumar
A Language We Built Together: A Physician Assistant’S Reflection On A Renal Transplant, Oviya Mahendran, Sampathkumar Sakthi Selvakumar
Journal of Wellness
This is not just a story of kidney transplantation in a tertiary care hospital in a tier-2 city of South India. It is all about a true clinical journey of resilience, where a young woman with congenital hearing loss, battling chronic kidney disease, discovered hope, understanding, and companionship through a physician assistant's compassionate communication.
The Impact Of Cyber Resilience On Achieving Digital Development: A Survey Study At North Oil Company, Huda Abdul Rahim Hussein, Ali Abdul Fattah Alshaher, Ahmed Zuhair Tawfiq
The Impact Of Cyber Resilience On Achieving Digital Development: A Survey Study At North Oil Company, Huda Abdul Rahim Hussein, Ali Abdul Fattah Alshaher, Ahmed Zuhair Tawfiq
Muthanna Journal of Administrative and Economics Sciences
The research aims to identify the impact of cyber resilience on achieving digital development in the North Oil Company within the framework of a conceptual model that relies on cyber resilience as an independent variable with its four dimensions (prevention, protection, response, recovery) and a dependent variable represented by digital development with its dimensions (digital infrastructure, digital skills, digital inclusion, technological innovation) The research adopted a survey methodology, and data was collected using a questionnaire developed based on previous studies that employed tested measures in the field of information systems and information security. The research sample consisted of 312 individuals …
The Impact Of Generative Ai Applications On Employees’ Perceived Job Security: A Field Study In Knowledge-Intensive Organizations In Iraq, Hayder Ibrahim Hassoon
The Impact Of Generative Ai Applications On Employees’ Perceived Job Security: A Field Study In Knowledge-Intensive Organizations In Iraq, Hayder Ibrahim Hassoon
Muthanna Journal of Administrative and Economics Sciences
This study examines the impact of generative artificial intelligence (GenAI) applications on employees’ perceived job security within knowledge-intensive organizations in Iraq. A quantitative, descriptive–analytical field design was employed. Data were collected through a five-point Likert-scale questionnaire administered to a stratified random sample of 420 employees from four organizations: Zain Iraq, Asiacell, Korek, and Rafidain Bank. The independent variable was operationalized through three dimensions: intensity of daily GenAI use, the impact of automation and job redesign, and organizational governance of GenAI use. The dependent variable was employees’ perceived job security. Reliability and construct validity supported the instrument’s adequacy for analysis, with …
The Role Of Agile Human Resources In Enhancing Job Performance: An Exploratory Study Of The Opinions Of A Sample Of Human Resources In The Traffic Directorate Of Sulaymaniyah Governorate, Wafaa Salman Ibrahim, James Yohana Odeesh
The Role Of Agile Human Resources In Enhancing Job Performance: An Exploratory Study Of The Opinions Of A Sample Of Human Resources In The Traffic Directorate Of Sulaymaniyah Governorate, Wafaa Salman Ibrahim, James Yohana Odeesh
Muthanna Journal of Administrative and Economics Sciences
Many organizations face challenges related to poor job performance resulting from difficulty adapting to rapid changes in the work environment. This necessitates the adoption of modern management approaches capable of enhancing human resource efficiency and improving performance levels. Agile human resources is one of the most important of these approaches that contributes to enhancing job performance. Based on this, this research seeks to identify the role of lean human resources as an independent variable in enhancing job performance as a dependent variable in the Sulaimaniyah Governorate Traffic Directorate. The research relied on a questionnaire as a data collection tool, consisting …
Insurance: A Hidden Tool In The Fire Adapted Community Toolbox?, Michael Patrick Wilshire
Insurance: A Hidden Tool In The Fire Adapted Community Toolbox?, Michael Patrick Wilshire
Dissertations and Theses
Increased costs associated with wildfire activity in the Western United States has raised concern about the long term stability of homeowners insurance. One popular approach to reducing the risk of catastrophic wildfire is the completion of Firewise behaviors on residential properties. I explored homeowner experiences with homeowners insurance, and asked if rising insurance premiums and policy non-renewals are affecting homeowners' Firewise behaviors. I surveyed homeowners living in the Wildland Urban Interface (WUI) in Deschutes County, Oregon to understand their experiences with homeowners insurance, past Firewise actions, and intentions to complete Firewise actions in the near future. Most homeowners surveyed have …
Development And Evaluation Of An Llm Based Nursing Documentation, Sumi Sung, Hyeyoung Lee, Wooje Sung, Do Yeon Kim, Jung Eun Hong, Yewon Lee, Seung Hee Lee
Development And Evaluation Of An Llm Based Nursing Documentation, Sumi Sung, Hyeyoung Lee, Wooje Sung, Do Yeon Kim, Jung Eun Hong, Yewon Lee, Seung Hee Lee
International Nursing Research Congress (INRC)
Background: Accurate nursing documentation is essential for communicating patient status and ensuring patient safety. However, heavy workloads and non-standard terminology often lead to omissions and errors. Large language models (LLMs) show promise in supporting nursing documentation, but hallucinations raise safety concerns. To mitigate these risks, we adopted a retrieval-augmented generation (RAG) approach that grounds responses in standard nursing terminologies [1]. This study aimed to develop and evaluate an RAG-based chatbot that supports nursing documentation using standard terminology and procedures.
Methods: From January 2022 to May 2024, we analyzed 70,926 unstructured nursing narratives from 76 patients with myocardial infarction who underwent …
Best Practices For Implementing Culturally Responsive Teaching In The Elementary Music Classroom To Promote Student Equity, Inclusion, And Cultural Representation, Anne E. Champa
Graduate Teacher Education
This paper examined the best practices for incorporating culturally responsive teaching into the elementary music classroom to promote equity, inclusion, and cultural representation. As classrooms become more diverse, educators must adapt their curriculum and instructional practices to ensure all of their students' needs are met. Unlike regular classroom elementary school teachers, who work with a small group of students for the entire school year, elementary music teachers work with every student in the building. Therefore, elementary music teachers are in a unique position to effectively lead with a culturally responsive curriculum. This literature review was organized into three overarching themes …
Massachusetts Governor Healey: So-So Approval Ratings, Still Favored For Re-Election 8/27/2026, Unh Survey Center
Massachusetts Governor Healey: So-So Approval Ratings, Still Favored For Re-Election 8/27/2026, Unh Survey Center
All UNH Survey Center Polls
Half of Massachusetts residents approve of incumbent Democratic Governor Maura Healey's overall job performance, but majorities disapprove of her handling of housing and the cost of living, the two most important problems cited by Massachusetts residents. However, Healey holds wide leads over both Michael Minogue, the frontrunner for the Republican gubernatorial nomination, and Brian Shortsleeve in the November general election.
Staff Education To Enhance Clinical Staff Knowledge Of Medication Adherence Strategies In Bipolar Disorder, George Niyi Ojewale
Staff Education To Enhance Clinical Staff Knowledge Of Medication Adherence Strategies In Bipolar Disorder, George Niyi Ojewale
Walden Dissertations and Doctoral Studies
Medication nonadherence in bipolar disorder is a significant contributor to relapse, hospitalization, and functional decline. This doctor of nursing practice (DNP) staff education project addressed a practice gap at the project site involving inconsistent clinician knowledge and absence of a standardized approach to adherence education. The practice-focused question for this project was: How does implementing an evidence-based staff educational program improve clinical staff knowledge in supporting medication adherence in patients with bipolar disorder? The purpose of this project was to implement a structured, evidence-based educational intervention to improve clinician knowledge related to medication adherence strategies. The intervention consisted of a …
Electrical Leaders’ Effective Strategies To Reduce Workplace Fatalities And Injuries, Amy Clark
Electrical Leaders’ Effective Strategies To Reduce Workplace Fatalities And Injuries, Amy Clark
Walden Dissertations and Doctoral Studies
Workplace electrical safety programs help reduce injuries and fatalities, yet some U.S. electrical leaders who manage safety programs and oversee safety issues lack effective strategies to sustain safe environments to reduce electrical accidents. Grounded in Heinrich’s incident/accident pyramid theory and behavior-based safety theory, this qualitative pragmatic inquiry explored strategies used by six electrical leaders who successfully reduced workplace incidents. Data were collected through semistructured interviews and document analysis and analyzed using Castleberry and Nolen’s inductive thematic approach. Key themes included hazard identification, controls, personal protective equipment and inspections, common challenges (time, resistance, complacency), communication and engagement, safety culture and leadership, …
Reducing Inpatient Falls Through Staff Education, Courage Duin Chiangeh
Reducing Inpatient Falls Through Staff Education, Courage Duin Chiangeh
Walden Dissertations and Doctoral Studies
Patient falls remain a major patient safety concern, particularly among hospitalized stroke patients who are at increased risk because of impaired mobility, neurological deficits, and cognitive changes. The inpatient stroke unit selected for this quality improvement project consistently reported the highest fall rates within the hospital system, highlighting the need for evidence-based interventions. The purpose of this project was to determine whether a structured fall-prevention education program incorporating evidence-based practices and the 4Ps of purposeful rounding (pain, potty, position, and possessions) would improve staff knowledge, increase compliance with fallprevention practices, and reduce patient falls over a 2-month period. Guided by …
Workplace Loneliness And The Impact Of Social Connections In Distributed Teams, Belkys Stallings
Workplace Loneliness And The Impact Of Social Connections In Distributed Teams, Belkys Stallings
Walden Dissertations and Doctoral Studies
Workplace loneliness is a growing organizational challenge as the rise of distributed teams reshapes opportunities for social connection and engagement. Business leaders need to understand this challenge because it is associated with reduced belonging, lower job satisfaction, diminished productivity, and increased turnover intentions. The purpose of this quantitative correlational study was to examine the extent to which distributed team environments (remote, hybrid, or flexible) impacted workplace loneliness and whether social connectedness moderated this relationship. Social exchange theory, self-determination theory, and Weiss’s concept of loneliness grounded this study. The participants comprised 84 adults working full-time in distributed team environments across the …
The Relative Strength Of Compulsive Reward-Driven Eating, Weight Self-Efficacy, And Physical Appearance Comparison In Predicting Feelings Of Self-Worth, Kathleen Rowe
Walden Dissertations and Doctoral Studies
Walden University College of Psychology and Community Services This is to certify that the doctoral dissertation by Kathleen Rowe has been found to be complete and satisfactory in all respects, and that any and all revisions required by the review committee have been made. Review Committee Dr. Hedy Dexter, Committee Chairperson, Psychology Faculty Dr. Medha Talpade, Committee Member, Psychology Faculty Chief Academic Officer and Provost Sue Subocz, Ph.D. Walden University 2026
Socioeconomic Determinants Of Malaria Infection Among Pregnant Women In Cameroon, Sub-Saharan Africa, Arnold Akosah Muluh
Socioeconomic Determinants Of Malaria Infection Among Pregnant Women In Cameroon, Sub-Saharan Africa, Arnold Akosah Muluh
Walden Dissertations and Doctoral Studies
Malaria during pregnancy is a significant public health issue in Cameroon, affecting maternal health and birth outcomes. Despite preventive measures, disparities exist among socioeconomic groups and between urban and rural areas. The study was guided by the social-ecological model and explored how socioeconomic factors and geographic location influence malaria infection in pregnant women. Specifically, the impact of wealth index, maternal education, and healthcare access on infection rates, considering maternal age, parity, and residence, was examined. Quantitative data from the Cameroon DHS Phase 8 were used (N=1204). The sample included pregnant women with valid malaria test results. Chi-Square tests and binary …
Effective Strategies To Increase Employee Engagement Within Small And Medium Enterprise (Sme) Remote Workforces, Marion Catherine Hulse-Lawlor
Effective Strategies To Increase Employee Engagement Within Small And Medium Enterprise (Sme) Remote Workforces, Marion Catherine Hulse-Lawlor
Walden Dissertations and Doctoral Studies
The prevalence of remote work environments has created challenges for small and medium enterprise (SME) healthcare leaders who must sustain workforce productivity while increasing employee engagement. Declining employee engagement affects not only productivity but also organizational effectiveness and profitability. The purpose of this qualitative pragmatic inquiry research project was to identify and explore the effective strategies that some leaders of remote SME healthcare workforces use to improve employee engagement. Using engagement theory as the conceptual lens to guide the research project, six purposefully sampled United States business leaders who demonstrated successful engagement practices within remote SME healthcare workforces were studied. …
2026-08-27 Provost Martin Speaks On Commencement Controversy, Dylan Berman
2026-08-27 Provost Martin Speaks On Commencement Controversy, Dylan Berman
The Spectator Online
No abstract provided.
Enhancing Protections For Professionals Who Report Misconduct As Required By A Fiduciary Duty Or A Professional Code Of Conduct, Nicholas Daniel Seger, Kelli Myers
Enhancing Protections For Professionals Who Report Misconduct As Required By A Fiduciary Duty Or A Professional Code Of Conduct, Nicholas Daniel Seger, Kelli Myers
San Diego Law Review
Whistleblowers play a critical role in maintaining ethical standards within professional environments, yet current legal frameworks often leave professionals who report misconduct vulnerable to severe retaliation. Despite clear ethical and fiduciary duties requiring professionals, including attorneys, accountants, and medical providers, to report known misconduct, those who fulfill these obligations may face termination, reputational harm, and financial loss. The case of Bohatch v. Butler & Binion starkly illustrates the chilling effect of insufficient legal protections, where a partner’s adherence to her ethical duty resulted in professional exile. Without robust legal safeguards, professionals are left to navigate a treacherous landscape where integrity …
Evolution Of Global Sea‐Level Rise Projections And Their Uncertainty, Andra J. Garner, Amy Appollina, Jessica Slotter, Gregory G. Garner, Aimée B. A. Slangen, Robert E. Kopp, Benjamin P. Horton
Evolution Of Global Sea‐Level Rise Projections And Their Uncertainty, Andra J. Garner, Amy Appollina, Jessica Slotter, Gregory G. Garner, Aimée B. A. Slangen, Robert E. Kopp, Benjamin P. Horton
School of Earth, Environment, and Society Faculty Publications and Presentations
For more than 40 years, scientists have projected future sea‐level change. Documenting how sea‐level projections have evolved is vital for tracking progress, uncertainties, and future research needs. Here, we update and analyze a database of global‐mean sea level (GMSL) projections dating from 1982 to 2025, identifying five key findings. First, GMSL projection generation has been concentrated in a small number of developed countries, with 95% of projections produced in the United States, United Kingdom, European Union, or Australia. Second, while GMSL projections for 2050 and 2100 have been published regularly since the early 1980s, only 30 of 103 studies have …
Spartan Daily, August 27, 2026, San Jose State University, School Of Journalism And Mass Communications
Spartan Daily, August 27, 2026, San Jose State University, School Of Journalism And Mass Communications
Spartan Daily, 2026
Volume 167, Issue 04
Operational Resilience In Cubesat Tracking Operations Through Complementary Architectures At Dss-17, Andrea Togni, Emily Walter, Chloe Hart, Ryan Collins, Noah Patrick, Christo Smith, Nathan Fite, Benjamin Malphrus, Marc Sanchez-Net
Operational Resilience In Cubesat Tracking Operations Through Complementary Architectures At Dss-17, Andrea Togni, Emily Walter, Chloe Hart, Ryan Collins, Noah Patrick, Christo Smith, Nathan Fite, Benjamin Malphrus, Marc Sanchez-Net
Small Satellite Conference
Loss of phase-locked loop (PLL) lock during CubeSat tracking can simultaneously eliminate both telemetry and Doppler observables, leaving operators blind during critical mission phases. While closed-loop receivers provide high-precision tracking under nominal conditions, they remain vulnerable to low signal-to-noise ratio, rapid Doppler dynamics, oscillator instability, and modeling errors. This single-point failure mode reduces operator situational awareness precisely when it is most needed. This work presents a dual-acquisition architecture that eliminates single point failure in CubeSat ground tracking. Implemented at DSS-17, Morehead State University's 21-meter deep-space antenna, the system pairs a conventional closed-loop modem with a parallel open-loop receiver implemented on …
Automatic Modulation Classification For Spectrum Sensing In Shared Satellite–Lte/5g Bands, Nahal Maleki, Todd Williams, Ulugbek Jainakov, Jason Jugar, Gilberth Caamano, Jeffrey Arnold
Automatic Modulation Classification For Spectrum Sensing In Shared Satellite–Lte/5g Bands, Nahal Maleki, Todd Williams, Ulugbek Jainakov, Jason Jugar, Gilberth Caamano, Jeffrey Arnold
Small Satellite Conference
Automatic modulation classification (AMC) is a critical capability for spectrum monitoring, interference detection, and signal identification in increasingly congested satellite and terrestrial communication environments. This paper presents a convolutional neural network (CNN)-based AMC framework that classifies analog, digital, and multicarrier communication signals directly from raw in-phase and quadrature (I/Q) samples. The proposed framework supports twelve modulation classes, including binary phase shift keying (BPSK), quadrature PSK (QPSK), 8PSK, 16 quadrature amplitude modulation (16QAM), 64QAM, pulse amplitude modulation (PAM)4, Gaussian frequency shift keying (GFSK), continuous phase FSK (CPFSK), broadcast FM (B-FM), single-sideband amplitude modulation (SSB-AM), double-sideband AM (DSB-AM), and orthogonal frequency-division multiplexing …
Scaling Orbital Dynamics To The Laboratory: An Industrial-Robot Hardware-In-The-Loop Testbed For Small Satellites, Kelsey Tresemer, Shawn Higbee, Eric Albin, Steven Magana-Zook, Monwen Shen, Aaron Peer, Eric Reichel, Miranda Stern, Steve Hunter, Zach Shields
Scaling Orbital Dynamics To The Laboratory: An Industrial-Robot Hardware-In-The-Loop Testbed For Small Satellites, Kelsey Tresemer, Shawn Higbee, Eric Albin, Steven Magana-Zook, Monwen Shen, Aaron Peer, Eric Reichel, Miranda Stern, Steve Hunter, Zach Shields
Small Satellite Conference
This paper summarizes an emerging hardware-in-the-loop (HIL) capability that uses collaborative robots (cobots) to reproduce satellite relative motion in a laboratory environment. The system maps orbital dynamics into a room-scale workspace while preserving mission-relevant pose evolution for small satellite applications such as rendezvous and proximity operations, formation flying, inspection, and cislunar concepts. The platform treats robot selection as a multi-parameter trade among workspace, orientation coverage, payload capacity, stiffness, acceleration, and path-tracking performance. Representative motion profiles define the required operating envelope, and the facility supports modular payloads that can host optics, avionics, inertial units, and flight computers. An external metrology system …
Catarina-A2: A Cubesat-Based Approach To Environmental Data Collection Using Sdr Technology In The Catarina Constellation, Gabriel Mariano Marcelino, Carlos Augusto Porto Freitas, Carlos Eduardo Possamai, Heitor Azuma Kagueiama, Elço João Dos Santos Junior, Flávio Gabriel Oliveira Barbosa, Paulo Alberto Macedo Vieira Violada
Catarina-A2: A Cubesat-Based Approach To Environmental Data Collection Using Sdr Technology In The Catarina Constellation, Gabriel Mariano Marcelino, Carlos Augusto Porto Freitas, Carlos Eduardo Possamai, Heitor Azuma Kagueiama, Elço João Dos Santos Junior, Flávio Gabriel Oliveira Barbosa, Paulo Alberto Macedo Vieira Violada
Small Satellite Conference
The Catarina Constellation is a Brazilian small-satellite initiative conceived to expand and modernize national space-based services through low-cost, scalable, and application-oriented CubeSat missions. Structured into mission-specific fleets, the constellation is designed to address strategic national needs while simultaneously fostering technological development and industrial capability within Brazil. Its first fleet is dedicated to environmental data collection, supporting governmental agencies and research institutions that rely on timely and reliable information for environmental monitoring, water resource management, and agricultural planning. Within this context, the Catarina-A2 mission represents a key step in the deployment of the constellation’s environmental data collection segment. Catarina-A2 is a …
The Billion Dollar Surprise: How Solar Cycle 25 Cut Satellite Lifetimes In Leo, Scott Shambaugh
The Billion Dollar Surprise: How Solar Cycle 25 Cut Satellite Lifetimes In Leo, Scott Shambaugh
Small Satellite Conference
Solar Cycle 25 has run far stronger than the 2019 consensus forecast issued by the NOAA/NASA/ISES prediction panel, with densities in low Earth orbit from 2022-2026 holding at 2-3x the predicted levels. The cumulative drag impulse experienced by LEO satellites, which is the driving metric for propellant budgets and mission lifetimes, reached 5-6 standard deviations beyond the forecast’s stated uncertainty. This means that even operators who designed conservatively against the two-sigma worst case fell short of their drag budgets. This paper quantifies a lower bound on the economic cost of that misprediction.
Starting from the 13,704 payloads on-orbit below 800 …