Digital Commons Network^™

Counter-Mapping A Sugar Mill In Mascarilla, Afro-Ecuadorian Ancestral Territory Of The Chota Valley, Andrea E. Chavez Chuquimarca

Graduate Masters Theses

This project examines the legacies of the colonial hacienda (estate) system in the community of Mascarilla, situated in the Ancestral Territory of the Chota Valley, Carchi Province, in the northern highlands of Ecuador. This study is framed within the first half of the 20th century, during the early stages of industrialization in Ecuador, and the last period in which the Trapiche de Mascarilla was still functioning. These elements will be viewed through the lens of the archaeological feature of the trapiche (panela production facility), serving as a referential space of history under the huasipungo system (debt-peonage). The interconnected components of …

Empowering Youth In A Changing Climate: Design, Implementation, And Evaluation Of A Salt Marsh Summer Science Program, Dan Levesque

Graduate Masters Theses

Climate change presents not only environmental challenges but also emotional challenges for today’s youth. This thesis documents the design, implementation, and evaluation of a field-based summer science program aimed at empowering adolescents with coastal salt marsh ecology while addressing climate change emotions and science identity development. The program, based in a Massachusetts salt marsh, was adapted from existing public environmental curricula and guided by place- and experience-based learning principles. Over Spring and Summer 2025, 13 students (ages 13-18) participated in extra-curricular field trips, hands-on research activities, and reflective discussions about the environment and the emotions it brings forth. Pre- and …

Information Processing In Quantum Thermodynamic Systems, Shou-I Tang

Graduate Masters Theses

This thesis extends the classical autonomous Hamiltonian framework of information thermodynamics to the quantum regime. In this formulation, a composite system consisting of a principal system, a heat bath, a memory, and a work source is described by fully quantum, time-independent Hamiltonian dynamics. By introducing the quantum speed limit (QSL) for the system and memory subsystems, referred to as the Quantum Thermodynamic Speed Limit (QTSL), I establish a connection between the QTSL and Landauer’s principle. This relationship reveals the fundamental constraints on quantum information processing in terms of dynamics and energy costs during the evolution. Furthermore, I present an interpretation …

Wilhelm Von Humboldt And The Idea Of The Modern University: The Unity Of Bildung And Wissenschaft, Ken Udas

Graduate Masters Theses

Wilhelm von Humboldt and the Idea of the Modern University examines Wilhelm von Humboldt’s contribution to shaping a philosophical ideal that has profoundly influenced the concept and identity of the modern research university for over two centuries. It highlights Humboldt’s position as a key figure in the Prussian reform movement and as the founder of the University of Berlin. Specifically, it addresses a question raised in the late twentieth century as part of the Mythos Humboldt revision: why has the Humboldtian Ideal maintained such lasting influence over the German university system, even as its practical realities have increasingly strayed from …

Analysis Of Penis Size Differences In Patients With Severe Erectile Dysfunction Non-Responsive Pde5i With Mesenchymal Stem Cell Secretome From Umbilical Cord, Kristophorus Jonathan Wibowo, Reny I’Tishom, Mohammad Ayodhia Soebadi, Muhammad Hidayat Surya Atmaja, Supardi Supardi, Ria Margiana, Fatkhurrohmah Leo Amalia

Folia Medica Indonesiana

The ineffectiveness of PDE5i[-10pc]AU: Please provide the affiliation of all authors. therapy is indicated by the patient’s unresponsiveness to oral medication, evidenced by insufficient erection after four attempts with the dosage recommended by the manufacturer. Consequently, the application of regenerative therapy may be seen as an effort to stimulate a response or improvement in erectile function, especially in individuals with erectile dysfunction who exhibit no significant progress after utilizing PDE5 inhibitors. Regenerative therapy seeks to repair damaged erectile tissue, with the objective of enhancing erectile function and rehabilitating tissue impacted by existing comorbidities. The secretome denotes the aggregate of chemical …

Experimental Analysis Of Droplet Deformation Dynamics In Combined Dc Electric And Shear Flow Fields Using Dpiv, Ayad Ibrahim Khlewee

Al-Esraa University College Journal for Engineering Sciences

This paper presented a systematic study of such droplet deformation at the intersection of uniform DC electric field and hydrodynamic shear flow, in which we focused on conductivity ratio (R) and permittivity ratio (S), describing their influence. The results demonstrate that droplet dynamics is extremely sensitive to the regime: under DC only, either elongation or compression depending on whether R > S or R S, similarly to classical EHD predictions. Under shear-only conditions, deformation was dictated by the balance of elongational stresses (EC) and rotational stresses (RC), with increasing capillary number (Ca) leading to progressive elongation and oscillatory orientation dynamics. When …

The Imaginary In Architecture: The Conceptual Structure Of The Imaginary And Its Manifestations In Architectural Text, Noora Ghadir Hlail, Abbas Ali Hamza Al Greiza

Al-Esraa University College Journal for Engineering Sciences

This study explores the concept of the imaginary as a collective cognitive and cultural structure that shapes symbolic reality through images, myths, and deeply rooted symbols in collective memory. The research applies this concept within the field of architecture, aiming to understand how the imaginary is embodied in architectural texts as symbolic carriers of identity and cultural meaning. Adopting a descriptive-analytical methodology, the study develops a theoretical framework comprising key components—preconditions, mechanisms, and traits of the imaginary—and applies it to two selected case studies: the General Secretariat of the Iraqi Council of Ministers and the Louvre Abu Dhabi Museum. The …

Generative Ai For Method Development In Analytical Chemistry: A New Paradigm In Experimental Design And Optimization, Yasir Fathi Mahmood

Al-Esraa University College Journal for Engineering Sciences

The fast development of artificial intelligence (AI), especially generative AI models, is changing the environment of analytical chemistry. As classical method generation in analytical methods relies on manual trial-and-error methodology as well as statistical methods, generative AI is a new paradigm with automated generation of experimental methodology and optimization. In this paper, the authors discuss the use of generative AI-based technologies, including large language models (LLMs) and neural network-based generators, to create new, efficient, and customized methods of analysis. The paper examines existing applications, technology frameworks, and issues and offers a roadmap with regards to the future incorporation of generative …

Numerical Modeling And Experimental Validation Of A High-Temperature Latent Heat Thermal Energy Storage System Using Metallic Phase Change Materials For Concentrated Solar Power Applications, Fouad Hashim Sharhan

Al-Esraa University College Journal for Engineering Sciences

To ensure reliable performance for the power-block of CSP plants, high power density and near-isothermal discharge must be achieved. A robust means of achieving this is through thermal energy storage (TES). High temperature latent heat storage (LHS) with phase change materials (PCMs) can serve these purposes, however the conventional salts used in PCMs typically suffer from low thermal conductivity that limits power density and increases energy storage charging/discharging times. This manuscript investigates ways to address these limitations using high temperature metallic phase change materials (MPCMs) while also developing a validated numerical framework to aid in their design. To this end, …

Thermal Performance Evaluation Of Solar Cooling Systems For Educational Facilities In Baghdad, Yasser Alawi Mohammed Attia Al-Jubouri

Al-Esraa University College Journal for Engineering Sciences

Schools in Baghdad also suffer from poor thermal comfort, which is a common problem in high-temperature and low-humidity arid climates such as that of the city, where using cooling devices leads to a large energy demand and overloads on the national power grid. Such study offers a thorough assessment of the thermal performance of solar-based cooling systems in an efficient manner to be suitable for educational buildings in Baghdad. The analysis is centred on a solar thermal cooling system with absorption as the heat interaction medium, and an experimental characterisation and mathematical simulation itself are performed. A pilot installation, consisting …

Optimal Control Of Stochastic Systems: A Numerical Study Of The Stochastic Linear Quadratic Regulator Framework, Gülşen Orucova Büyüköz, Yaprak Güldoğan Dericioğlu, Tuğçem Partal

Mathematical Modelling and Numerical Simulation with Applications

Optimal control of stochastic linear systems is fundamental in control theory, with applications in robotics, finance, and engineering. The Stochastic Linear Quadratic Regulator (SLQR) derives optimal feedback laws via the Riccati equation but requires numerical discretization of the resulting stochastic dynamics. Despite extensive studies on numerical methods for stochastic differential equations, their performance within the SLQR framework remains insufficiently explored. This study compares two predictor–corrector schemes of different orders: the Order 1.0 Predictor-Corrector (PC) method and the Order 2.0 Weak PC method. A one-dimensional linear quadratic problem with a closed-form solution enables precise error evaluation against the analytical trajectory. Convergence …

From “Contact Zone” To “Collaborative Zone”: Multilingual Writers’ Tensions And Opportunities In The Writing Center, Qianqian Zhang-Wu, Isabelle M. Lundin, Neal Lerner

The Writing Center Journal

Writing center scholars have adopted Pratt’s (1991) “contact zone” metaphor to describe the diversity of consultants and students in writing centers, but this literature has largely overlooked the perspectives of multilingual students. Through surveys, interviews, and session data, we found that while multilingual students described rich linguistic identities, they also experienced tension and instability as language users. Students often framed their considerable language assets as deficiencies in academic writing contexts. They faced additional tension between instructor expectations and their own understanding of assignment goals. Students frequently sought native-like language competency from consultants and expected them to serve as informants about …

An Entrepreneurial Approach To International Engineering Programs, Mark W. Rectanus

Journal of International Engineering Education

No abstract provided.

Efficient Task Allocation Technique For Robots In Smart Warehouse Using Center Of Items (Coi) Methodology, ‪Ahmed Yahya‬‏, Mohamed S. Saraya, Ahmed I. Saleh

Mansoura Engineering Journal

Nowadays, online shopping is very important in Daily life. in 2020 During the quarantine during the spread of COVID-19, online orders increased dramatically, as a result of the great progress in fifth-generation technologies and using the Internet of Things (IoT) and industrial Internet of Things (IIoT), industry 4.0 and 5.0, fog computing, cloud computing, robots systems, and drones systems. Smart warehouses picking system becomes a Basic need and can be implemented to improve efficiency in logistics. Smart warehouses are growing more dependent on robot systems to make the process of meeting these requests more flexible and effective. Therefore, the allocation …

The Role Of Fuzzy Logic In Cost-Volume-Profit Analysis, Ahmed Imad Abed Al-Atabe, Mohammed Wafi Abbas Al-Shammar

Muthanna Journal of Administrative and Economics Sciences

Cost-volume-profit analysis (CVP) is one of the most important basic tools in management accounting. It enables understanding the relationship between three key elements: costs, volume, and profit level. The problem with this research is that this type of analysis, in its traditional form, uses clear and fixed data, such as the variable cost per unit, total fixed costs, selling price, or sales volume, which can be accurately determined. However, these assumptions do not accurately reflect practical reality, which is often characterized by uncertainty and fluctuations. The research aims to utilize an artificial intelligence tool, fuzzy logic, as a more flexible …

The Role Of Expert Systems In Enhancing Organizational Performance In Hotel Organizations A Descriptive–Analytical Study Of The Opinions Of A Sample Of Managers And Employees In First-Class Hotels In Erbil Governorate, Dr. Hassan Odah Ghdaab

Muthanna Journal of Administrative and Economics Sciences

The study aimed to identify the role of expert systems as an independent variable with its dimensions (hardware, software, knowledge engineer) in enhancing organizational performance as a dependent variable. The research problem emerged through the need to determine the role of expert systems in improving organizational performance if adopted by managers and employees in the surveyed hotel organizations. A hypothetical model was presented to test the main and sub-hypotheses and to answer the research questions. The study focused on five-star hotels, with the research population consisting of managers and employees in hotel organizations in Erbil Governorate, specifically: (Erbil Quartz Hotel, …

Choices, Challenges, And Considerations: Exploring College Application Experiences Of De La Salle University Manila Senior High School Students To The Big Four Universities, Samantha Elise F. Bago, Argie Joseph F. Geronimo, Zenaida Victoria Alejandra M. Ilao, Kimberly Cassandra G. Jose, April Rose C. Gonzales

Sinaya: A Philippine Journal for Senior High School Teachers and Students

Most Filipino students strive to secure successful applications to universities such as the University of the Philippines (UP), Ateneo de Manila University (ADMU), De La Salle University (DLSU), and the University of Santo Tomas (UST). Known as the Big Four Universities, they are recognized for their high rankings, strong academic programs, scholarship opportunities, campus resources, strategic locations, alumni networks, and overall prestige. However, applying to these institutions is not without challenges, especially as senior high school (SHS) students balance their academic demands with application requirements. These narratives are often overlooked, overshadowed by the success or failure of the applications. Thus, …

Bio-Papcz: Corn Starch-Based Composite Bioplastic Reinforced With Pineapple Leaf Fiber (Palf), Zinc Oxide (Zno), And Polyvinyl Alcohol (Pva), Marvin C. Caya, Shervin Austin C. Huang, Jovar Khalel J. Maghari, Ruel M. Levida

Sinaya: A Philippine Journal for Senior High School Teachers and Students

Plastic pollution poses a serious global threat, as petroleum-based plastics persist for centuries, and their surging production of over 450 million tons overwhelms ecosystems (Ritchie et al., 2023). Using a quantitative experimental research design, the study examined the effects of varying concentrations of cornstarch-based bioplastic reinforced with pineapple leaf fiber (PALF), polyvinyl alcohol (PVA), and zinc oxide (ZnO) on the bioplastic’s tensile strength and soil degradability. Sample C2 (ZnO 3.0 %w/w; PVA 9.0 %w/w) demonstrated the optimal tensile properties with a tensile strength of 0.76 MPa and an elongation at break of 6.40%, which was attributed to the addition of …

Effects Of Foam Type And Thickness On Impact Resistance, Thermal Insulation, And Cost-Effectiveness Of Medical Containers For Drone Delivery, Josh Henry C. Soriano, Eriel V. Fonte, Lambertsus S. Novera, Nicolai Paolo B. Villarin, Joel B. Jalon, Jr.

Sinaya: A Philippine Journal for Senior High School Teachers and Students

Accessible healthcare remains a challenge for rural communities lacking reliable infrastructure for medical supply delivery. Delivery drones have recently emerged as a viable alternative, dropping medical containers during flight. However, the effectiveness of different foam types and thicknesses combined with corrugated cardboard as shock-absorbing materials in a medical container for delivery drones has yet to be tested. Thus, this study designed cost-effective containers using corrugated cardboard and multiple foam types and thicknesses, aiming to preserve the integrity of the contents, withstand impact, and control temperatures. Four foam types—polystyrene, polyurethane, polyethylene, and expanded polystyrene (EPS) —were tested at 1 cm, 2 …

Comparing Individual Vs Mixed Treatments Of Chicken Bone Meal And Crab Shell Meal On The Growth Of Capsicum Annuum (Bell Pepper), Allthur Rudy R. Arroyo, John Rafael V. Capinia, Ethan Jude R. Reyes, Elnathan Jethro B. Sumalbag, Karl Benedict E. Viri, John Ray Cordova Estrellado, Kerry P. Cabral

Sinaya: A Philippine Journal for Senior High School Teachers and Students

The recycling of nutrient-rich food waste reduces reliance on synthetic fertilizers, enhances soil quality, and improves plant growth. Existing studies have demonstrated the effectiveness of food waste, such as bone meal (B) and crab shell meal (S), as fertilizers; however, their combined use has not been investigated. This study aims to evaluate the effect of varying proportions of B and S fertilizers on the growth of Capsicum annuum (bell pepper) employing a random complete block design with 10 treatments (pure B, pure S, and a 50:50 BS mix, each at 7 g, 14 g, and 21 g) plus a control …

Exploring The Metric Dimension Of The Graph Representing A Four-Ring Polycyclic Aromatic Hydrocarbon: Interstellar 1-Cyanopyrene, Andrei Matthew V. Robino, Sebastian Alex C. Traviña, Karl Benedict P. Narag, Mark Anthony B. Casao, Helix Raven C. Llanes, Azriel C. Alejo, Jonel C. Celamor

Sinaya: A Philippine Journal for Senior High School Teachers and Students

A graph's metric dimension is a parameter that denotes the minimum possible number of vertices in a subset that gives each vertex in the graph a unique representation. Despite extensive research on the metric dimension of polycyclic aromatic hydrocarbons (PAHs), there is currently no focused analysis on the metric basis and metric dimension of 1-cyanopyrene. In chemistry, graphs can be used to depict molecular structures. In this study, graph theory, specifically the concept of metric dimensions, is applied to the molecular structure of 1-cyanopyrene, which was detected in space for the first time in 2024. 1-cyanopyrene is a molecule made …

Experiences Of Bukidnon Farmers On The Use Of Carbonized Rice Hulls (Crh) Waste From Biomass Boilers As A Soil Conditioner, Dash Constantine S. Chamen, Queen Loraine D. Ban, Michael Justin O. Eluna, Pole Honson B. Gabitano, Ian Jay P. Saldo, Jhovel Roy D. Calo

Sinaya: A Philippine Journal for Senior High School Teachers and Students

The long-term use of agricultural products that adversely affect soil is a significant issue for farmers. This study explored the potential of carbonized rice hulls (CRH) waste from biomass boilers as a sustainable soil conditioner. The research investigated the specific soil conditioning properties of CRH and explored the lived experiences of nine (9) Bukidnon farmers to correlate their observations with the material’s chemical profile. The composition analysis identified a high silica content and essential micronutrients, such as calcium and magnesium, which act as nutrient restorers and pH regulators. The thematic analysis of semi-structured interviews, four themes emerged to summarize the …

An Arabic Version Of The Intuitive Eating Scale-2: Translation And Validation Among The Saudi Population, Eram Albajri, Manal Naseeb

Journal of King Abdulaziz University: Medical Sciences

Background: Eating is a complex behavior in humans, shaped by an interplay of biological, psychological, and sociocultural factors. Tools like the Intuitive Eating Scale-2 (IES-2) offer valuable insights into eating behaviors, but their effectiveness depends on cultural and linguistic adaptability.Objective: In this study, we translated the IES-2 into Arabic and validated its psychometric properties among a large Arabic-speaking sample in Saudi Arabia.Methods: The IES-2 was translated using the forward-backward translation approach. The final translated version was distributed online to a convenient sample of the Saudi population. Exploratory factor analysis was performed to examine the construct validity of the …

Knowledge And Attitude On Analgesic Use Among Female Students At King Abdulaziz University In Rabigh, Saudi Arabia, Abdulrahman Abudawood, Iman Wahby, Haneen Aseeri, Jamila Bukhari, Rawan Almutairi, Ghadi Alsharif, Futoon Almutairi, Tawfik M. Ghabrah, Jamil A. Samkari

Journal of King Abdulaziz University: Medical Sciences

Background: Self-medication, specifically with analgesics such as paracetamol and non-steroidal anti-inflammatory drugs (NSAIDs), is prevalent among university students. This behavior can potentially lead to health risks, including hepatotoxicity and gastrointestinal complications. This study aimed to evaluate knowledge, attitudes, and practices regarding analgesic use among female students at King Abdulaziz University (KAU) in Rabigh, Saudi Arabia.

Methods: A cross-sectional survey was conducted in 2022, involving 371 participants. The questionnaire collected socio-demographic information, knowledge about analgesic side effects, attitudes toward their use, and practices during examination periods.

Results: Most students (65.4%) showed a moderate understanding of analgesics, with medical and nursing students …

Lead Bioremoval By Halotolerant Bacteria Isolated From Mangrove Rhizosphere Soils Of Saudi Arabia, Reda H. Amasha, Rawan A. Alhazzani

Journal of King Abdulaziz University: Marine Science

Bioremediation of hypersaline environments contaminated with heavy metals is challenging due to high salinity levels, particularly when using conventional microorganisms. This study aimed to isolate and identify halotolerant and halophilic bacteria from various mangrove rhizosphere soil samples in Saudi Arabia and to evaluate their ability to remove heavy metals under high-salinity conditions. Out of 27 isolated strains, LD57 and LR40 demonstrated the highest resistance to lead ions. Both isolates grew well at 37 °C in the presence of 3 M NaCl and recorded growth at varying concentrations of lead nitrate, ranging from 100 to 4500 ppm. The lead’s minimum inhibitory …

A Systematic Literature Review Of Sustainable Ports Strategies And Initiatives In The Arabian Gulf Ports – Lessons For Saudi Arabia And Uae, Osayd Helal, Jane Haider, Jean-Paul Skeete, Sehwa Lim

Journal of King Abdulaziz University: Marine Science

This systematic review provides a comprehensive evaluation of sustainability strategies in Arabian Gulf ports, focusing on the interplay between technological advancements, green initiatives, and regulatory challenges. While Industry 4.0 technologies—such as automation, artificial intelligence, and electrification—have been integrated to enhance operational efficiency and reduce carbon emissions, the extent to which these innovations align with regional policy frameworks and geopolitical constraints remains insufficiently analysed.

To address this gap, this review synthesises insights from 25 peer-reviewed studies, employing a comparative framework to assess the adoption of sustainability practices in Arabian Gulf ports, focusing on their approaches toward sustainable port development. It is …

New Fish-Based Multimetric Index For Appraising Shatt Al-Arab Ecological Quality, Laith Faisal Lazem

Journal of King Abdulaziz University: Marine Science

In recent years, there has been a growing need to develop biometric indicators that accurately reflect an area’s environmental quality and biological integrity. Various indicators have been developed and analyzed, focusing on functional, ecological, and organism-based indicators, particularly fish-related ones. The purpose of the current paper is to create the first fish-based multimetric index designed to evaluate the quality of water in the Shatt Al-Arab River (SAAR), known as Shatt Al-Arab Fish Index (SFI), which can also be applied to the Qarmat Ali River and other water bodies similar to the SAAR ecology. Data was collected from three stations along …

Trajectory Prediction Of Oil Spills In Sharm Obhur, Red Sea Using Hydrodynamic Modeling, Mohammed A. Bahattab, Gar Al-Nabi Ibrahim, V.R. Shamji

Journal of King Abdulaziz University: Marine Science

This research investigates the movement and impact of oil spills in Sharm Obhur, a coastal creek near Jeddah, in the Red Sea. Utilizing a high-resolution multi-beam echo sounder and the Delft3D-FLOW hydrodynamic simulation model, the study traces the oil spill trajectories, considering key factors such as meteorological conditions, spill volume, and oil properties. The model predicts the movement of the oil spill both within Sharm Obhur and its progression towards the Red Sea. Results from the model are intended to assist in the development of effective spill response strategies, improving navigation safety, protecting coral reefs, and preserving the local ecosystem. …

Morphometric, Physiological, And Environmental Health Assessments Of Enhalus Acoroides From The Southeast Coast Of Bali, Indonesia, Made Pharmawati, Luh Putu Wrasiati, Ni Made Gari

Journal of King Abdulaziz University: Marine Science

Seagrasses function as primary producers and as spawning grounds and shelter for marine biota. Regardless of their relevance, seagrasses are under threat due to anthropogenic impacts and an increasing frequency of extreme climate events. Enhalus acoroides is a species of seagrass that is spread in the east and southeast waters of Bali, from Sanur Beach to Nusa Dua Beach. This study aims to analyze the differences in morphometry and the chlorophyll, proline, and malondialdehyde (MDA) content, a marker for oxidative stress in E. acoroides leaves at Pengastian Beach, Semawang Beach, and Samuh Beach, Bali. Samples were collected using line transect …

Latent And Sensible Heat Flux In The Red Sea And Gulf Of Aden Using The Nemo Ocean Model Simulation, Moaath Ghanem, Yassir Albouraee, Mohammed A. Alsaafani, Alaa Albarakati

Journal of King Abdulaziz University: Marine Science

The new configuration of NEMO (Nucleus for European Modelling of the Ocean) model in the Red Sea and Gulf of Aden was presented for analyzing latent heat flux (LHF) and sensible heat flux (SHF) patterns in the region. The model was setup with 1/20° horizontal resolution and 30 vertical layers, using ERA5 atmospheric data for surface forcing. The model output for LHF, and SHF was compared with KAUST-Buoy observations and many reanalysis products (the French Research Institute for Exploitation of the Sea (IFREMER) surface turbulence fluxes, Japanese Ocean Flux Data Sets with Use of Remote Sensing Observations (J-OFURO3), Objectively Analyzed …