Digital Commons Network^™

Overall Design Method Of Low Earth Orbit Communication Satellite Based On Mbse, Jiace Shang, Rui Zhang, Ya Dai, Hua Zhu, Siqi Hu, Linqiang Ge, Chenguang Shi

Journal of System Simulation

Abstract: Drawing on the model-centric design philosophy of model-based systems engineering (MBSE), this study constructs a model architecture suitable for the design and analysis of low Earth orbit communication satellites. This architecture adopts a multi-dimensional matrix approach. Vertically, it traverses the mission layer, system layer, satellite general design layer, and subsystem layer, achieving top-down hierarchical decoupling. Horizontally, it establishes a comprehensive view mapping mechanism covering the domains of requirements, functions, structure, and performance. Integrating the characteristics of product development, a modeling process covering the entire lifecycle—from mission demonstration and overall design to subsystem design and integration verification—has been established. The …

Biomass Fuel Processing, Mineral Matter Engineering, And Ash Phase Equilibria For Deposition Control In Coal To Biomass Boiler Conversion, Spencer Bandi

Theses and Dissertations

As the conversion of coal utility boilers to 100% biomass combustors gains traction, understanding the interconnected impacts of harvesting and storage methods, fuel preparation, and thermochemical ash behavior is critical. This study evaluates miscanthus, switchgrass, and corn stover, targeting a < 1000 µm particle size through minimal (shredders/hammer mills) and heavy (pelletizing) pre-treatment. While heavy pre-treatment failed in a coal mill, minimal pre-treatment succeeded. Miscanthus (forage-harvested/silage-bagged) proved optimal, exhibiting minimal exogenous mineral accumulation up to (1.26 w%) and the smoothest mechanical feeding (deviation < 9%) due to its low particle aspect ratio. Conversely, baled switchgrass and corn stover accumulated up to 9.23 w% mineral matter and exhibited severe feeding resistance (>17% deviation) driven by fibrous, high-aspect-ratio morphologies. During combustion, agricultural residues yield low ash fusion temperatures (AFTs), generating deposits two to three times stronger than coal. To mitigate this severe fouling, mineral additives (coal fly ash, lime, and cement kiln dust) were injected. These additives effectively raised bulk AFTs and reduced deposit tenacity by up to 73%. Specifically, 2 w% …

Nightlights For Older Adults: Enhancing Bedroom-To-Bathroom Transitions With Community Resident Feedback, Yue Luo, Aubrey Contreras, Susana Valdivia-Rivas, Yuhao Chen, Boyi Hu

Faculty Research, Scholarly, and Creative Activity

This study aimed to inform nightlight design by analyzing older adults’ subjective feedback and kinematic responses during evening activities. Twenty-seven older adults (mean age: 81 ± 6 years; 14 females) participated in the study. Their preferences for nightlight illuminance and hue were surveyed, and gait and posture adaptations under two illuminance levels were analyzed using spatiotemporal comparisons, principal component analysis (PCA) based analysis, and waveform reconstruction. The results revealed that older adults preferred low illuminance over high illuminance, with warm white and cool colors as the favored choices for evening lighting. Significant differences were observed in spatiotemporal gait variables, particularly …

When The States Lost Their Senate: The Seventeenth Amendment, Katelyn King

Honors College Theses

To what extent has the Seventeenth Amendment impacted American federalism? The Seventeenth Amendment changed the way United States Senators are chosen from state legislature appointment to popular direct election. However, the framers of the U.S. Constitution established the original method for selecting U.S. Senators to safeguard an important principle in America’s government: federalism. If the Seventeenth Amendment decreased direct state influence in the federal government, it could have weakened federalism in America; consequently, the amendment may have altered how the American system of government is supposed to function. The U.S. Senate’s selection process was not only a safeguard for federalism …

Exploring Alternate Methods Of Flood Output Estimation During Natural Disasters, Finley Gardner

Honors College Theses

In April of 2025, extreme flooding damaged many homes and buildings of people across Kentucky. The Federal Emergency Management Agency (FEMA) produces maps that show the potential for flooding in areas around water bodies, but many of the April flooding damaged areas were well outside of the FEMA classification zones. The main purpose of this thesis research was to create an accurate model of potential flood extent in Kentucky and compare it to FEMA maps. This model did not require extensive computing power and produced a map that accurately depicted flood extent through the use of Digital Elevation Model (DEM) …

Lanthorn, Vol. 60, No. 15, April 20, 2026, Grand Valley State University

Volume 60, August 4, 2025 – April 20, 2026

Lanthorn is Grand Valley State's student newspaper, published from 1968 to the present.

Does Ethnic Identity Moderate The Association Between Ethnic Discrimination And Gambling Harm Among Hispanic Or Latino/A/X College Students, Adrianna Jordan Valencia

Electronic Theses and Dissertations Archive

No abstract provided.

Economic Sanctions And State Capacity In Target Countries, Showrav Paul

Electronic Theses and Dissertations Archive

The thesis examines whether economic sanctions erode the target countries’ state capacity and whether these effects differ by the identity of the sanctioning actors. Drawing on “the naïve theory of sanctions”, the thesis hypothesizes that economic sanctions reduce fiscal and administrative capacity but incentivize military capacity. By incorporating data from the Global Sanctions Database, the World Bank, and the V-Dem datasets, the thesis employs country-fixed-effects models to test hypotheses. The overall findings contradict the naïve assumptions and indicate that sanctions have limited efficacy in undermining the state capacity of target countries. The results can be summarized as follows: 1) economic …

Libraries And Librarians Get After Participatory Science, Catherine Wong, Megan Bresnahan

Faculty Publications

No abstract provided.

Exploring The Importance Of Mental Health Education In 5th Grade & Its Impact On Emotional Well-Being, Claudia K. De Jong

Masters Projects

Exploring The Importance of Mental Health Education in 5th Grade & Its Impact on Emotional Well-being

Abstract

Mental health challenges among youth continue to rise, with many mental health disorders emerging before adolescence, highlighting a critical gap in early prevention efforts. This study explores the importance of implementing structured mental health education in 5th grade as a proactive approach to supporting emotional development and reducing long-term behavioral risks. Grounded in research on developmental psychology and social-emotional learning (SEL), this project examines how early intervention can improve emotional regulation, help-seeking behaviors, and overall student well-being during a key transitional period. Using …

Intouch Week Of April 20, 2026, New York Medical College

InTouch

• Revisiting AIDS, Advocacy, and the Evolution of Medicine
• NYMC Unites for Parkinson's Disease Awareness Month
• NYMC Visits Yale's Cushing Center
• TCDM New Mexico is On-air
• In The Community: Medical Students Serve Their Communities
• In The Community: NYMC Students Provide Screenings at Community Health Fair
• Student Spotlight: Katelyn Lawson, D.P.T. Class of 2026, Shares a Journey Guided by Purpose and Shaped by Mentorship
• Faculty Profile: Shaping Future Clinicians Through Research and Connection

An Educational Intervention To Increase Nurses’ Knowledge And Confidence Of Patient Mobility, Debbie Ann Pytak

Walden Dissertations and Doctoral Studies

Immobility is a significant concern given that nearly half of all hospitalized adults are immobile during their hospitalization, placing them at increased risk for adverse outcomes. As a result, it is critical for nurses to implement strategies that promote safe, structured patient mobility. Thus, the purpose of this Doctor of Nursing Practice (DNP) project was to determine if an educational intervention focused on patient mobility and standardized mobility tool utilization increased knowledge and confidence among nursing staff in an acute care setting. Ten participants volunteered to attend the educational intervention. The average age of the participants was 44.30 years (SD …

The Impact Of State And Federal Policies On Academic Researchers: Findings From A National Survey, Dylan Ruediger, Chelsea Mccracken, Jonathan Barefield

Copyright, Fair Use, Scholarly Communication, etc.

Key findings

● State and federal policies targeting divisive concepts or DEI are shaping research agendas at scale and across disciplines. Twenty percent of all respondents, and 29 percent of researchers working in states with divisive concepts or similar laws, reported having avoided certain research topics because of state laws and policies.

● Eight percent of respondents representing a wide range of disciplines reported having had a federal grant cancelled in 2025.

● Eleven percent of respondents reported that federal and state policies restricting research activities are compelling them to seek employment out of state, to leave the academy, or …

Sustainability, Culture, And Higher Education: An Autoethnographic Sustainability Comparison Of The Sustainability Initiatives At The University Of Salzburg And Bowling Green State University, Madison Alt

Honors Projects

Human activity is already triggering damaging environmental tipping points (Lenton, 2020), emphasizing the need for sustainability in all aspects of development. Institutes of Higher Education (IHEs) have the power and responsibility to contribute to a more sustainable world (Parr et al., 2022). Bowling Green State University (BGSU) in Ohio, United States, and the Paris Lodron University of Salzburg (PLUS) in Salzburg, Austria are two IHEs with multifaceted sustainability programs. While living and studying at BGSU and PLUS, I used autoethnography, a personal narrative approach, combined with public sustainability information to compare the sustainability initiatives at each university, and determine what …

Uptake And Fate Of Silver And Zinc Engineered Nanoparticles In Maize Under Single And Binary Dosing Soil Ecosystems, Lei Xu, Qingbo Yang, Xingmao Ma, Honglan Shi, John Yang, Hu Yang, Samira Mahdi, Ying Wang, Young Shin Jun

Chemistry Faculty Research & Creative Works

Recent agricultural applications of engineered metallic nanoparticles (ENPs) have raised concerns about their uptake and fate in plants. To understand this critical issue, this study investigated the fate and uptake of silver (Ag) and zinc oxide (ZnO) ENPs in maize (Zea mays L.) after single or binary ENP exposure in soil. Results indicated that both Zn and Ag elemental concentrations in roots increased with increasing ENP dosage. Ag NPs in the tissues were detected, but not Zn NPs. Ag NP concentration was 3 times higher in the roots than in the shoots at low Ag NP dosing, while Ag NP …

Building Understanding: Developing A Mental Health Literacy Scale For Teacher Preparation Faculty, Jesse Mossholder

Dissertations, Theses, and Projects

This study aimed to create a valid and reliable Teacher Preparation Faculty Mental Health Literacy Scale. Current literature consistently indicates that traditional undergraduate college students experience high rates of stress, anxiety, depression, and burnout. Teacher preparation programs often lack systematic approaches to supporting student mental health or to preparing faculty to respond effectively. While the literature, resources, and institutional support regarding college student mental health have increased, a significant gap remains in understanding faculty mental health literacy within the context of teacher preparation programs. This mixed-methods sequential exploratory study utilized non-discriminative snowball sampling to recruit preservice educators and teacher preparation …

Astrocyte Circadian Regulation In Neurodegeneration: In Vivo Bmal1 Occupancy Mapping Using Macs-Calling Cards, India Reiss

Arts & Sciences Graduate Student Theses and Dissertations

Astrocytes maintain neuronal homeostasis through cellular programs that are frequently disrupted early in neurodegenerative disease, many of which are regulated by the circadian clock. The core clock transcription factor BMAL1 is required for normal astrocyte function, yet whether its regulatory activity is altered during neurodegeneration remains unclear. BMAL1 expression changes in disease are often inconsistent, suggesting that transcription factor binding, rather than expression, may be a more informative readout of BMAL1 function. We used a Cln3Δex7/8 model of neurodegeneration, which exhibits early astrocyte dysfunction prior to widespread neuronal loss, to test whether degenerative pathology reprograms BMAL1 binding in astrocytes. We …

Ramifications Of Not Digitalising Registries And Records Centres In Civil Service In Zambia, Glenda Ntalasha, Tuesday Bwalya, Chrispin Hamooya, Sututu Imasiku, Kadeyo Mutale Kuyela, Dalitso Mvula, Matilda Mercy Muchinga

Library Philosophy and Practice (e-journal)

Digitalisation of records management among other things, improves access to records and results in efficiency and effectiveness in the functions of an organisation. Because of the potential benefits of digitalisation, several governments globally have automated registries and records centres. However, governments in the Global South, Zambia inclusive have not digitalised the records sub sector. This study investigated the consequences of not digitalising registries and records centres in public service in Zambia. A survey research design was used combining both quantitative and qualitative research techniques. Data was collected from a sample 118 respondents and key informants. Qualitative data was collected through …

Evaluating The Nuclear Structure Of Some Calcium Mirror Nuclei, Sukaina Falah Hassan, Ban Sabah Hameed

Baghdad Science Journal

In this study, we calculated the binding energy of nuclei, which holds atomic nuclei together, by utilizing electron scattering transformations in the shell model to explore the nuclear structure for proton-rich pairs of mirror nuclei: ³⁴Ca-³⁴Si, ⁰Ca-³⁵P, ³⁶Ca-³⁶S, and ³⁷Ca-³⁷Cl. The proton envelope that surrounds the proton-rich nucleus explains why the nucleus charge and its mirror image have different radii. The wave functions for single particles were adopted from the Skyrme-Hartree-Fock approximation and Wood-Saxon potential to compute the mirror radii, mirror charge radii, and skin thickness for protons …

Impacts Of Climate Change On Agricultural Production And Adaptation Strategies In Northeast China, Ming Jiang, Aizhen Liang, Peng Qi

Bulletin of Chinese Academy of Sciences (Chinese Version)

As the “stabilizer” of national food security, Northeast China is highly sensitive to climate change. Over the past 60 years, the regional temperature has risen significantly at a rate of 0.034℃/a, which is much higher than the global average of 0.0074℃/a. The improvement of thermal resources has driven a significant northward expansion of high-yield and heat-demanding crops, such as maize and rice. Nevertheless, increased warming has enhanced evapotranspiration demand, which, combined with the expansion of planting scales, has led to a 19.8% increase in agricultural irrigation water consumption over the past 20 years, resulting in a prominent contradiction between supply …

Challenges In Strategic Exploitation Of Deep-Sea Minerals And China’S Countermeasures, Chang Wang, Xiaojie Shu, Siyuan Zhou, Huiling Song, Shaojun Liu, Xiangxin Xu, Tao Dai, Tao Zhang, Peng Wang, Zheng Li, Jinhua Cheng

Bulletin of Chinese Academy of Sciences (Chinese Version)

Facing the new stage of strategic mining of deep-sea minerals and the long-term pressure of supply of critical minerals, China urgently needs to seize the window of opportunity for the strategic exploitation of deep-sea critical minerals and open up new sources of supply of critical minerals. Having analyzed the new global situation and challenges of the strategic exploitation of deep-sea critical mineral resources, the study attempted to clarify the supporting role of deep-sea mining in securing critical mineral supply, as well as the actual conditions and main obstacles for the strategic exploitation of deep-sea critical mineral resources in China. Based …

Northern Rainstorm Belt And Response Strategies, Jianping Huang, Xiaodan Guan, Xiaohuang Liu, Xiaohan Shen, Xiaojie Liu

Bulletin of Chinese Academy of Sciences (Chinese Version)

In the summer of 2025, the Northern Rainstorm Belt stretching from eastern Northwest China to the Northeast region exhibited a significant increase in summer precipitation and rainfall frequency over northern China. Cities in the north were frequently struck by extreme rainstorms, resulting in prominent disasters such as “floods in drylands and urban waterlogging”. Northern China spans a vast territory, serving not only as a major grain-producing area and a densely populated region but also as an ecological security barrier that connects the farming-pastoral ecotone and the Loess Plateau. Its stability has nationwide implications. Therefore, comprehensively enhancing flood control capacity, strengthening …

Risks And Challenges Under Approaching Climate Tipping Points And Governance Recommendations, Chengdong Huang, Xiaohong Chen, Zhifang Zhou

Bulletin of Chinese Academy of Sciences (Chinese Version)

Climate tipping points represent critical thresholds at which Earth’s climate subsystems undergo abrupt transitions, characterized by irreversibility, self-perpetuation, and complex interconnections, posing severe challenges to global climate governance. This study systematically elucidates the scientific implications and key features of climate tipping points, with a focus on analyzing the multifaceted risks triggered by their activation, including climatic physical risks, socio-economic systemic risks, and national security risks. To address these challenges, the research proposes a governance framework centered on “preventing abrupt changes—maintaining resilience—actively adapting”, emphasizing pathways such as enhanced monitoring and early warning, cultivating new quality productive forces, and constructing a global …

Simulation And Projection Of Glaciers And Their Runoff In Xinjiang Based On Tgsgs, Zhongqin Li, Yefei Yang, Bowen Liu, Huilin Li, Zexin Zhan, Feiteng Wang, Chunhai Xu, Weibo Zhao

Bulletin of Chinese Academy of Sciences (Chinese Version)

Glaciers are large flowing ice bodies formed from snowfall in cold regions. Due to the intrinsic physical properties of ice and the complexity of boundary conditions, physically based modelling of glacier change remains a global challenge. With support from the Chinese Academy of Sciences’ key science infrastructure program for the field station, the Tianshan Glaciological Station completed the Tianshan Glacier Station Glacier Simulator (TGSGS) in 2025. TGSGS features advanced representations of the physical mechanisms driving glacier change and multi-scale ensemble strategy, and is integrated with a reference glacier observation network based on terrestrial laser scanning (TLS), a low-temperature laboratory for …

Decolonizing The Academic Library: Examining The Successful Indigenization Of Ubc And Unm’S Library Services, Emily T. Villars

School of Information Student Research Journal

This article examines decolonization and indigenization initiatives at two academic libraries: the University of British Columbia (UBC) and the University of New Mexico (UNM). It asks how these institutions have implemented indigenization in their libraries and what lessons can inform broader reconciliation work across North America. Through a comparative lens, it analyzes how national and organizational frameworks, such as the Canadian Federation of Library Associations (CFLA-FCAB) Truth and Reconciliation Report and Recommendations and the American Indian Library Association’s (AILA) organizational goals, can shape these efforts. The study highlights three core strategies: decolonizing access and classification, transforming library spaces, and expanding …

Peninjauan Kembali Pemanfaatan Selat Malaka, Usmahadi Usmahadi

Jurnal Hukum & Pembangunan

Abstract

Analysis Of Students’ Problem-Solving Errors Based On Newman’S Stages In Group Discussions, Ilfi Nur Diana, Nyamik Rahayu Sesanti, Sri Rahayu

Jurnal Pendidikan Humaniora

This study aims to analyze students’ problem-solving errors during group discussions using Newman’s Error Analysis (NEA), while also exploring how social interaction influences error formation. This research addresses a gap in previous studies that predominantly focus on individual error analysis, with limited attention to collaborative learning contexts. A qualitative descriptive approach was employed involving 29 fifth-grade students at SDN Arjowinangun 1, Malang, Indonesia. Data were collected through classroom observations, written tasks, and semi-structured interviews, and analyzed using the Miles and Huberman interactive model, including data reduction, data display, and conclusion drawing. Data validity was ensured through triangulation and member checking. …

Development Of A Local Wisdom-Based Educational E-Book To Enhance Social Participation Of Students With Special Needs At Sd Negeri 31 Banda Aceh, Fidawati Fidawati, Siti Mayang Sari, Zahraini Zahraini

Jurnal Pendidikan Humaniora

Education for Children with Special Needs (ABK) continues to face persistent challenges, particularly regarding the availability of accessible and contextually appropriate teaching materials, as well as low levels of student social participation. The integration of local wisdom from Acehnese culture through digital media is regarded as an innovative approach to supporting inclusive learning. This study aims to develop and evaluate the feasibility of a local wisdom-based educational e-book designed to enhance the social participation of ABK students at SD Negeri 31 Banda Aceh. A quantitative approach was employed using the Research and Development (R&D) method, following the ADDIE (Analysis, Design, …

Developing A Gayo Culture-Based Cooperative Learning Intervention Model To Enhance The Learning Process Of Elementary School Students, Sudarni Sudarni, Siti Mayang Sari, Didi Yudha Pranata

Jurnal Pendidikan Humaniora

This study aims to develop a cooperative learning intervention model based on Gayo culture to improve student learning processes. This research method is Development (R&D) with a 4D model. The research subjects were 20 students. The definition stage was carried out by analyzing students' needs and characteristics, then the stage of designing cooperative learning syntax based on Gayo cultural values, the development stage included expert validation and limited trials, and dissemination was carried out on a limited basis in the school environment. Data collection techniques used expert validation sheets, questionnaires on the practicality of teachers, students, and the learning process. …

Development Of Bestari Eco-Environmental Learning Teaching Materials To Enhance Critical Thinking Skills Among Fifth-Grade Students On The Topic Of “My Earth”, Mayna Aryunita, Siti Mayang Sari, Mhd. Syafii

Jurnal Pendidikan Humaniora

This research aims to develop contextual teaching materials based on the "BESTARI" eco-environment framework to enhance the critical thinking skills of 5th-grade students on the topic "My Earth." Utilizing the Research and Development (R&D) method with the ADDIE model (Analysis, Design, Development, Implementation, and Evaluation), the study was conducted at SD Negeri 4 Aceh Tengah. Data collection involved expert validation, practicality questionnaires, and pretest-posttest instruments. Results indicate that the materials achieved a "Very Valid" status (90.6%) and "Very Practical" status (92.3%). Effectiveness tests demonstrated a significant improvement in critical thinking, with a student mastery rate of 88.7%. This study implies …