Digital Commons Network^™

Grid Fragility, Blackouts, And Control Co-Design Solutions, Mario Garcia-Sanz

Faculty Scholarship

The grid is undergoing a large-scale transformation, including a significant reduction of synchronous generators, a high penetration of inverter-based resources and renewables, substantial demand growth, new extra-large loads, aging infrastructure and a concerning vulnerability to contingencies. Some of the recent massive blackouts in Spain/Portugal, Chile and Texas are exposing the fragility of the grid as we know it today. This paper introduces new solutions to stabilize the grid under undesired dynamic interactions and extreme contingencies, with the goal of avoiding cascading failures and blackouts. Using control co-design methodologies, the paper proposes three interdependent categories to improve the reliability and controllability …

Changes In Royal Air Force Aviation Technology, Tactics, And Strategy From World War I To World War Ii, Daniel J. Heiser

Doctoral Dissertations and Projects

The changes in aviation technology, strategy, and tactics in the Royal Air Force (RAF) formed at the end of World War I and throughout the Second World War would later sculpt the future of the modern era. This dissertation aims to explore the changes the RAF made which would ultimately help the Allied Forces win the Second World War and fill in the gaps of history that has seemed to have forgotten. The research shows that with the advancement of radar systems in the interwar period and the focus on fighter plane production the RAF became an outstanding fighting force. …

Bahadur Representations For Canonical Quantile Regression: A Correction And Extension, Stephen Portnoy

Mathematics and Statistics Faculty Publications and Presentations

Portnoy (2022) introduced a version of Canonical Correlation anal- ysis based on Regression Quantiles. The proof of the asymptotic convergence of the estimators contained some gaps. A new proof is developed using Bahadur representations to obtain asymptotic represen- tations for the Canonical Regression Quantile components with error uniformly O_p (n^-1/4 log n). These innovative representations justify approximations and automatically provide joint convergence in dis- tribution. This enables an inductive argument to obtain asymptotic results for all components. These novel Bahadur approximations may have more general application and interest.

Isotopic Fingerprints Of The Coastal Margins: Tracing Dissolved Iron Sources From Land To Sea, Hannah R. Hunt

USF Tampa Graduate Theses and Dissertations

Dissolved iron (dFe) is an essential micronutrient for sustaining life in the surface ocean. Nearly four decades of research dedicated to understanding sources, cycling and biogeochemical modifications of Fe sources in the global oceans has generated a significant body of research supporting the idea that the concentration of Fe in the surface ocean exerts significant controls on primary production and carbon uptake in the surface ocean. Creation of the GEOTRACES program greatly increased the spatial and temporal resolution of high-quality trace element and trace element isotope data revealing new insights into the global Fe cycle, especially through the use of …

Applications Of Contracting Self-Similar Groups To Cryptography And Scale Groups, Arsalan Akram Malik

USF Tampa Graduate Theses and Dissertations

Given their peculiar properties, self-similar groups are of great interest both from applications and theoretical standpoints. In this work we study the scope of their applications in post-quantum cryptography and in constructing scale groups via lifting maps.

We propose self-similar contracting groups as a platform for cryptographic schemes based on simultaneous conjugacy search problem (SCSP). This class of groups admits fast polynomial-time algorithms for the word problem and element multiplication that can be used for effective encryption and decryption of messages. It contains extraordinary examples like the Grigorchuk group, which is known to be non-linear, thus making some of existing …

Effective Method Of Encoding Data Into Images For Recovery After Dsc, Kellie Shaw

Defensive Publications Series

Systems and methods for embedding metadata within image content is provided. One of these methods comprises generating, by the computing device, an image frame that includes a plurality of pixels corresponding to multiple color channels defining color characteristics of an image. The generating includes assigning a common value to a pixel subset of the plurality of pixels located on a first row of the image frame. The pixel subset corresponds to the multiple color channels defining the color characteristics of the image. The method also includes converting, by the computing device, the image frame to a luminance chroma format.

Multi-Door Cross-Dock Scheduling With Material Handling Resource Restrictions, William Ferrell, Nikhil Aditya Eti, Alison Gaddy, Vishal Badyal

International Material Handling Research Colloquium

No abstract provided.

Graph-Based Foundation For Dels Specification, Leon Mcginnis

International Material Handling Research Colloquium

No abstract provided.

Reinforcement Learning-Based Inventory Replenishment And Transshipment Planning In The Physical Internet Supply Chain, Simranjeet Singh Chadha, Uday Venkatadri

International Material Handling Research Colloquium

No abstract provided.

Acting On Behalf Of An Endangered Species - A Student-Led Initiative To Protect The San Joaquin Kit Fox (Vulpes Macrotis Mutica) On The Csub Campus, Antje Lauer, Sarah Alame, Brittney Beck, Lucas Hall

CSU Journal of Sustainability and Climate Change

California State University Bakersfield (CSUB) is the only campus in the U.S. that has supported an endangered canine species on its campus grounds for many decades. Deprived of its prime habitat, open grassland, the San Joaquin kit fox (SJKF) (Vulpes macrotis mutica) was able to adapt to urban areas in the San Joaquin Valley of California. The presence of an endangered species on campus grounds comes with responsibilities and requires knowledge of the Endangered Species Act (ESA). In the spring of 2023, students and faculty observed several violations of the ESA by CSUB Facilities Management due to ground disturbance and …

The Genesis Of Throughput Models For Automated Warehouse Systems - A Drama In Three Acts, Michael Walz, Timo Lehmann, Felix Rauscher, Christophe Senger, Kai Furmans, Michael Eder, Simon Schaffer, Philipp Trost, Maximilian Wagner, Georg Kartnig Prof.

International Material Handling Research Colloquium

No abstract provided.

Being Efficient Or Responsive In The Order Picking Process, Jelmer Pier Van Der Gaast

International Material Handling Research Colloquium

No abstract provided.

Navigating Reintegration: A Qualitative Exploration Of The Challenges And Success Factors For Women Offenders In Society, Arabella Grace Alegrid Velasquez, Beatrice Gabrielle Z. Dyquiangco, Vylet Xummer Eduardo Pimpinio, Tamachi Agnesia Varent, Lander James Luke Torres Villanueva

DLSU Senior High School Research Congress

This study explores the different challenges and success factors women ex-offenders face during their reintegration into society after being incarcerated. With the help of 11 women on parole and probation in Baguio City from interviews, the researchers were able to examine their experiences and perspectives. Superordinate themes emerged, namely Reintegration Struggles and Societal Rejection, Resilience Through Support Systems, and Stigma and Social Exclusion. The results indicate the personal, societal, and structural barriers that women offenders face upon reintegration. Additionally, the successful reintegration of women offenders is influenced by both internal and external support systems, personal motivation, and spiritual guidance. A …

Water Quality In Estero De Balete Using Moringa Oleifera-Enhanced Bokashi Balls: Heavy Metals, Turbidity, And Acidity, Alliyah Kirstyn Banilla Rafols, Sheila Mae Empase De Leon, Marie Antoinette Villafañe Robles, John Albert Dupaya Gurtiza

DLSU Senior High School Research Congress

Water pollution threatens public health and the environment, particularly in developing counties. Estero de Balete in Manila, Philippines, a tributary of the Pasig River, is affected by heavy metal contamination, murky water, and highly acidic water. This study examines Moringa oleifera-enhanced Bokashi balls for bioremediation purposes. The Bokashi balls were prepared with effective microorganisms (EM-1), molasses, rice hulls, and garden clay soil, incorporating varying concentrations of Moringa oleifera seed powder and pods (0.10 g, 0.25 g, and 0.40 g) in comparison to a control setup. Water samples were tested for lead (Pb), cadmium (Cd), turbidity, and pH. The results …

Bioluminescent Bacteria In Squid Ink (Photololigo Duvaucelii) As A Potential Water Pollution Indicator At Selected Areas In Dasmariñas, Cavite, Jessica Rae G. Siyang, Remien Grace Balidvid, Aleeva Alexa V. Carrascal, Alyssa Mae V. Libranza, Arisha Jianne R. Dias

DLSU Senior High School Research Congress

Bioluminescent bacteria are light-emitting microorganisms that are commonly found among marine species. In this study, bioluminescent bacteria were isolated from squid samples and submerged in selected water samples from Ylang-Ylang River and Dasmariñas Zone I River in Dasmariñas, Cavite, to determine whether it can be a potential water pollution indicator based on its bioluminescence intensity. The squid ink extracted from 6 squid samples was streaked on marine agar plates and incubated for 24 hours. The microplates were filled with 0.75 μL bioluminescent bacteria and 0.75 μL of polluted water samples and sterile water per three rows, where the light intensities …

Navigating Ambiguity: An In-Depth Exploration Of Situationships In Contemporary Romantic Relationships, Shiywonee Khanalee De Jesus Delizo, Yonah Adamae Roxas Dapliyan, Hildebrand Tridant Awkit Ban-Eg, Calvine Audric Fajardo Canlas, Neil Ivan Dominguez Tong, Eliecea Red Ibarra Yusingco

DLSU Senior High School Research Congress

This qualitative study examined the phenomenon of situationships, which is defined as a romantic involvement that lacks clear commitment, boundaries, and labels. Situationships have surfaced in the context of modern dating culture with the rise of dating apps, in which people may display behaviors typical of couples but are contradictory to their traditional definitions of romantic relationships. This study explored the characteristics that define situationships, how people manage their inherent ambiguity, and why individuals prefer situationships over traditional established relationships. The data was gathered through in-depth interviews and an inductive thematic analysis of participants' experiences. The results revealed that open …

Cytotoxicity Of Ageratina Riparia (Mistflower) Biosynthesized Silver Nanoparticles In Allium Cepa Assay, Jharred Martinez, Kathryz Beyonce B. Fajardo, Althea Marie A. Navalta

DLSU Senior High School Research Congress

The use of green-synthesized nanoparticles offers a promising route toward eco-friendly and biocompatible alternatives in biomedical research. This study aimed to assess the cytotoxicity of silver nanoparticles (AgNPs) biosynthesized from Ageratina riparia extract. Given the growing interest in plant-mediated nanoparticle synthesis for safe therapeutic applications, evaluating their biological effects is crucial. The extract was obtained through maceration, and green synthesis was conducted using silver nitrate solutions (1 mM, 3 mM, 5 mM). The mixtures were boiled to isolate nanoparticle pellets, which were then redispersed in distilled water for use as treatment liquids in the Allium cepa assay. Results showed that …

An Analysis Of Esports Consumption Among Esports Viewers In Metro Manila, Amiel Tongco, Charles David Siao, Bryce Nathan Chicombing, Hugh Lawrence Ang, Liandro Antonio Tabora

DLSU Senior High School Research Congress

The rise of esports has transformed the entertainment scene, captivating gamers, and individuals from diverse backgrounds. As competitive esports cement their place in mainstream entertainment, understanding why and how esports have become what it is today is important. This research investigates the different motivational factors driving esports consumption in Metro Manila, Philippines. This study utilizes the MSES questionnaire to evaluate the primary motivational factors influencing esports engagement, providing preliminary insights into the impact of influential factors on consumer motivation in the rapidly growing esports market. The study explored the influential factors that affect esports consumption and spectatorship in Metro Manila, …

Youth In Leadership: Exploring The Roles, Challenges, And Impact Of Sangguniang Kabataan Chairpersons In Community Development, Hannah B. Ignacio Na, Alexandra Isabela B. Vergara Na, Markane Victor B. Carantes Na, Dayenne Say R. Labita Na

DLSU Senior High School Research Congress

The Sangguniang Kabataan (SK) plays a vital role in youth leadership and community development in the Philippines, yet its impact in Baguio City remains underexplored. This study examines the responsibilities, challenges, and strategies of SK Chairpersons in addressing youth-related issues. Using a qualitative research design with descriptive phenomenology, the study captures the firsthand experiences of eight SK Chairpersons, aged 18 to 24, through face-to-face interviews. Thematic analysis reveals key obstacles, including low youth engagement, leadership struggles, and difficulties in forming a quorum, which hinder project approvals and funding. Success depends on youth participation, priority setting, and balancing leadership with personal …

Bagyo Ka Lang!: The Impact Of Typhoons On The Lives And Productivity Of Contractual Workers At Miriam College High School, Jastine F. Budaño, Hannah F. Vigilia, Mariella R. Fernando, Sage V. Kong, Leona M. Ricero

DLSU Senior High School Research Congress

Every year, the Philippines faces devastating weather-related calamities that significantly affect vulnerable communities. Since it is located on the Pacific Ring of Fire, Filipinos are more prone to experiencing natural calamities such as typhoons, which negatively impacts the community. Contractual workers are defined as those who work under a “no work, no pay” policy and work for a specific period. Due to the absence of paid leave, health benefits, and stable income, contractual workers are financially vulnerable, making it harder for them to recover from disasters. This study explores how typhoons impact the daily life and work efficiency of contractual …

Barriers To Quality Maternal Healthcare In Barangay Kaingin 1, Quezon City: An Exploratory Study Anchored On The Integrated Patient Care Healthcare Services Framework (Ipchsf) And The National Safe Motherhood Program (Nsmp), Keanne Elisha E. Bulotano, Micah Althea A. Fontanilla, Hali Therez A. Hernandez, Adonah Isalyn B. Laza, Julia Nicole D.G. De Guzman

DLSU Senior High School Research Congress

Despite the implementation of national programs like the National Safe Motherhood Program (NSMP) that aims to improve maternal health outcomes, women in the Philippines still continuously face barriers in accessing quality maternal healthcare (MHC) due to systemic, societal, and psychological factors. Other persistent issues like poor healthcare service, insufficient understanding of health-related knowledge, and the lack of autonomy in decision making, which are especially prevalent in underserved communities, further discourage women from seeking care. This study aims to investigate these barriers and their impact on the overall well-being of mothers from Miriam College's partnered communities, like Kaingin 1. To explore …

Anonymous Whispers: A Critical Discourse Analysis On Digital Gossip In Select Philippine University Freedom Walls, Ryanne Gabrielle J. Roxas, Erica Gabryelle B. Lingad, Kean Christof Ramon L. Santiago, Ma. Samantha Raine E. Soliman

DLSU Senior High School Research Congress

The anonymity afforded by university freedom walls has proliferated the spread of information and digital gossip, actively shaping ideologies surrounding campus hierarchies—an influence that remains critically underexplored in academic research. This study addresses that gap by seeking to understand how freedom walls function as a form of discourse that constructs and negotiates hierarchical ideologies within academic communities. It analyzes 18 purposively sampled posts from the three most followed Facebook freedom walls of universities in the University Athletic Association of the Philippines (UAAP), namely the University of the Philippines Diliman (UP), National University (NU), and Ateneo de Manila University (ADMU). Using …

Crude Extract From Robusta Coffee (Coffea Canephora) Husks Using Ethanol: Steam Versus Ultrasonic, Julianne Kaye D. Cortes, Kirsten Shanel B. Bernardo, Ron Gabriel J. Perillo

DLSU Senior High School Research Congress

The global demand for renewable energy sources necessitates exploring sustainable alternatives to fossil fuels. Coffee husks, a significant agricultural waste product, represent a potential feedstock for biofuel production. This study investigated the comparative efficacy of steam distillation and Ultrasonic-Assisted Extraction (UAE), using ethanol as a solvent to extract crude extract from Coffea canephora husks. A comparative experiment was conducted using 200g of Coffea canephora husks for each extraction method (n=3 per method). Yields were measured in mL. An independent sample t-test was used to compare the mean yields between the two methods. UAE yielded significantly more crude extract (mean = …

Kuya Guard Needs Help!: Replanning Traffic Utility And Road Marking Placement As A Congestion Alleviant In Laguna Boulevard, Laguna, Rocco Nicolas D. Naranjo, Robert Anthony L. Amazona, Harley L. Buensalida, Erian Jeshua F. Margallo

DLSU Senior High School Research Congress

Traffic congestion is a widespread issue for commuters, influenced by multiple factors and variables. One such area affected is Laguna Boulevard, a critical road connecting multiple essential facilities in Biñan and Sta. Rosa, including Laguna Technopark and educational institutions like De La Salle University Laguna Campus and Caritas Don Bosco School. The roadway experiences significant congestion during peak hours due to high traffic volumes along segments and intersections impacted by uncoordinated road expansions, inconsistent transitions between one-way and two-way flows, limited sight distances, and obstructive roadside elements that collectively disrupt vehicular movement and compromise safety. This study proposes a replanned …

Video: A Media Revolution?

Communication Research Trends

Revolutions connected with technical inventions have been proclaimed, rightly and wrongly, so often in the recent past that it would seem appropriate to look for another expression just to avoid the danger of trivialization. But all the evidence says that this time we are in the presence of a real revolution and that we should call it by its name.

As a true revolution, the emergence of video has been like an explosion, full of energy and even passion, provoking divisions, inflicting wounds, destroying, upsetting and, also, raising hopes and promising new riches in the so-called "television wasteland". It will …

Exploration Of Adventure-Based Counseling And Its Impact On The Self-Concept Of At-Risk Youth, Kendall Kern, Mary Bess Pannel, Todd Davis, Thales Barbosa

Journal of Academic Underperformance

Background: Integrating experiential therapy techniques with physical activity and nature improves aspects of self-concept: social connectedness, resilience, and healthy coping skills in the short-term for at-risk, underperforming youth (Kraft & Cornelius-White, 2020). Kraft and Cornelius-White (2020) found that wilderness therapy counselors that taught communication skills and prioritized “group cohesion in group therapy” led to positive “changes to self-concept” (p. 350-351). Purpose: The researchers hypothesize that community-based adventure therapy will have a positive impact on the self-concept in at-risk, rural youth. Methodology/Approach: The researchers utilized a quasi-experimental model to assess the impact of adventure therapy on rural at-risk youth (N~6) after …

Development And Performance Evaluation Of Eco-Floor Tiles Made From Avocado (Persea Americana) Seeds, And Mango (Mangifera Indica) Seeds And Peels, Mark Dominique P. Mendoza, Kristine Cassandra T. Cacapit, Zion Ezekiel Micaiah Navia, Stephanie Anne A. Lim, Dominique Mae R. Gobaton, Jace Earl P. Gabitan, Gasper Juleo L. Otgalon, Josh Ryley C. Angeles, Hanz Mikkel A. Arnuza, Gwynette R. Legaspi

DLSU Senior High School Research Congress

The growing demand for sustainable construction materials has led to increased interest in utilizing agricultural wastes as eco-friendly alternatives. This study examines the potential of Avocado Seeds (AS), Mango Seeds (MS), and Mango Peels (MP) as additives in eco-floor tile production, incorporating them into cement mixtures through a quasi-experimental design. Various proportions of these agricultural by-products, collectively termed as Seeds and Peels Mixtures (SPM) were evaluated for compressive strength, flexural strength, and water absorption. A One-Way Analysis of Variance (ANOVA) was conducted to assess the effects of different additive ratios. Results revealed that compressive strength peaked at 49.40 MPa with …

Asclepad: Synthesis Of A Sustainable Bio-Wound Dressing Pad Using Chitosan And Vitamin C Infused Milkfish (Chanos Chanos) Skin For Advanced Wound Care, Diether Mark A. Lucero, Ramon Jacob L. Caluag, Juan Miguel M. Elayda

DLSU Senior High School Research Congress

Medical waste is an overlooked issue posing a significant environmental and public health threat, with 4.7 billion tons generated annually, accounting for 3% of overall waste, and wound dressing pads being a major contributor. Vitamin C, involved in all phases of wound healing, demonstrates synergy with Chitosan, a polysaccharide ideal for medical and cosmetic applications. Milkfish (Chanos chanos) skin, a dominant commercial fish in the Philippines, shows synergy with Chitosan and Vitamin C in wound healing. Thus, aligning with SDGs 3, 12, and 13, this study aims to synthesize and evaluate AsclePad, a sustainable wound dressing pad infused …

Iah-Net (Informative Air Quality And Heat Index Network): Drone-Assisted System For Real-Time Air Quality And Heat Index Monitoring, Brent Breo B. Magbanua

DLSU Senior High School Research Congress

Air pollution and rising temperatures threaten public health and safety, necessitating advanced monitoring solutions. This study developed a drone-assisted system for autonomous air quality and heat index monitoring, ensuring real-time alerts even without human presence. By integrating the K-Nearest Neighbors (K-NN) machine learning algorithm, the system provides an innovative and cost-effective approach to identifying environmental risks and raising awareness. The system consists of a Drone system, ESP32, MQ-135 gas sensor, and DHT11 temperature and humidity sensor for data acquisition. Software development includes implementing the K-NN algorithm and calibrating sensors to enhance classification accuracy. The system categorizes air quality as SAFE, …

Love Across Borders: A Qualitative Exploration Of Cultural Dynamics In The Romantic Relationships Of Foreign Students And Their Filipino Partners, Charlene Lorraine Posadas Jandoc, Katrizza Tabangcura Pingil, Gabrielle Malig Dayoan, Frances Niña Gaffud Co, Rhiezhan Ghael Espiritu Jamorabon, Simon Sebastian Tampoc Hiyadan

DLSU Senior High School Research Congress

Globalization has significantly impacted education in the Philippines, notably with the influx of international students coming into the country for educational opportunities. This phenomenon has led to numerous studies examining the various aspects of their experiences, such as their cultural adaptation processes, academic difficulties, and economic contributions. However, their interpersonal relationships, particularly their more intimate connections, have been largely overlooked. This study aims to probe into this, focusing on the dynamics, navigation strategies, and external influences that shape these relationships. Utilizing both online and face-to-face interviews, as well as online surveys, the experiences of nine (9) intercultural couples, each of …