Digital Commons Network^™

Investigating Seepage In Rough Porous Media Fractures Using Fractional Brownian Motion Simulation, Liu Weitao, Kong Debin, Mao Qingfu, Zhao Jiyuan, Gu Yulong, Zhang Xiao

Coal Geology & Exploration

Background Natural rock fractures are often partially filled with permeable materials such as silt and minerals under long-term geological and hydraulic actions, forming complex structures containing unfilled voids. The seepage characteristics of such fractures significantly influence petroleum extraction, mine water prevention, and the stability of underground engineering projects. Methods To reveal the underlying seepage mechanisms, this study generated rough profiles of unfilled voids with different fractal dimensions based on Fractional Brownian Motion. A theoretical expression for the overall permeability of partially filled fractures was derived, and a coupled free flow–porous medium flow numerical model was established. This framework was used …

Key Technologies And Engineering Practices For Green Drainage Of The Jurassic Burnt Rock-Hosted Water In The Shenfu Mining Area, Ji Zhongkui, Mou Lin, Wang Hai, Zhu Kaipeng, Zhao Kaixing, Chen Pan, Xue Xiaoyuan, Han Qiang, He Bo, Wang Fuming

Coal Geology & Exploration

Objective In the northern part of Shaanxi Province, coal mining has led to a pronounced contradiction between coal mining and water conservation, along with a serious threat to China’s ecological redline. These challenges necessitate transforming the mine water drainage pattern in coal mines. Green mine water drainage represents a key approach to achieving coordinated coal-water production in areas containing burnt rocks. Methods Focusing on the conservation-oriented utilization of the Jurassic burnt rock-hosted water in a coal mine within the Shenfu mining area, this study explored a solution to coordinated coal-water production in areas affected by burnt rock-hosted water from the …

Mine Water Storage In Deep Strata: Temperature Responses And The Quantitative Identification Of Primary Permeable Intervals, Xue Jiankun, Wang Shuangming, Zhang Pingsong, Wang Xiaodong, Han Le, Wang Zhizhou, Wang Yutong, Wang Zhibo

Coal Geology & Exploration

Background Storage in deep strata represents an effective approach to treating high-salinity mine water in mining areas of western China. For this technology, the use of directional wells can significantly enhance water injection efficiency, while selecting primary permeable intervals with high injectivity as drilling targets is key to its successful implementation. However, the accurate identification of these intervals in deep strata remains challenging. Methods By analyzing the wellbore temperature variations in the injection well during water injection, a qualitative model was developed to evaluate primary permeable intervals based on wellbore temperature curves. Following the principles of momentum and energy conservation, …

Field Tests On The Capillary Barrier Effect Of Covers For Comprehensive Utilization Of Solid Waste In Waste Dumps, Duan Xu, Chen Chuangchuang, Qiu Xun, Wang Bo, Shi Luyu, Yan Hanyang, Zou Yu, Qu Jin, Hu Zhaojiang

Coal Geology & Exploration

Background In the arid and semi-arid regions of northwestern China, the open-pit waste dumps of mining areas suffer from severe water erosion and the limited water-holding capacities of shallow cover soils. This restricts the ecological restoration of abandoned mine lands. Capillary barrier covers can enhance the water-holding capacities of water storage layers due to the differential hydraulic properties at the interface between fine- and coarse-grained layers. However, both the feasibility of constructing layered covers by mixing solid waste slags from waste dumps with clay and the water regulation performance of the covers are yet to be verified in the field. …

An Experimental Study On The Compressive Shear Failure Characteristics Of Mining-Induced Fractured Rock Blocks In The Absence Of Lateral Confinement And Under Unilateral Confinement, Wang Wenxue, Zhang Shicheng, Li Linyang, Zhang Ruochen, Liang Yankun, Chang Jian, Pan Xuwei, Zhao Guizhang

Coal Geology & Exploration

Objective Rock bridges exert a controlling influence on the deformation, fracture field evolution, and structural stability of mining-induced fractured rock masses. Therefore, it is necessary to investigate their deformation and failure characteristics, as well as the underlying controlling mechanisms, under different confinement conditions. Such investigations will provide theoretical support for the safe mining of underground coal seams and the prevention and control of mining-induced disasters. Methods Mechanical models of fractured rock blocks containing rock bridges were established. Specimens with different fracture dip angles, rock bridge widths, and material strengths were prepared using rock-like materials. Furthermore, an independently developed compressive shear …

An Integrated Automated Parameter Optimization Method Based On Fdem And Isight For Rock Mass Engineering: A Case Study Of Pillar Stability Design, Zhu Defu, Gao Bolong, Xu Jiabo, Wang Deyu, Gao Peng, Li Yalin, Hu Wenshuo

Coal Geology & Exploration

Background Conventional rock mass engineering design largely relies on empirical equations or numerical simulation schemes selected from a limited number of comparable cases, making it difficult to effectively balance multiple constraints such as safety, economic viability, and resource recovery. The finite-discrete element method (FDEM) based on the intrinsic cohesive zone model (ICZM) can effectively simulate the evolution of quasi-brittle materials from continuous to discontinuous behavior, rendering it particularly suitable for engineering issues involving highly discontinuous rock masses. Therefore, FDEM has become an important numerical analysis method in rock mass engineering. However, there remains an urgent need for a high-precision, integrated, …

An Image Recognition And Multi-Parameter Quantitative Characterization System For Fractures In Roadway Rocks, Xiong Yu, Jiang Lichun, Kong Dezhong, Li Jinzhu

Coal Geology & Exploration

Objective Conventional measurement methods for rock fractures suffer from low efficiency and high subjectivity. On the other hand, simple image recognition techniques struggle to achieve high-precision multi-parameter integrated analysis of rock fractures in complex roadway environments. To address these challenges, this study aims to develop an image recognition and multi-parameter quantitative characterization system for rock fractures. Methods At the core of the system is the formulation of a combined image preprocessing strategy. Specifically, fracture segmentation is conducted based on adaptive threshold binarization, isolated noise points are removed using morphological opening, and median filtering is introduced to perform the refined polishing …

Selection And Verification Of Optimal Key Parameters Of Ultra-Wideband Radars For Life Detection In Coal-Rock Shielding Environments In Coal Mines, Huang Yuan, Zheng Xuezhao, Wen Hu, Jin Feiyang, Xu Chengyu, Liu Yin, Ding Wen

Coal Geology & Exploration

Objective and Methods Ultra-wideband (UWB) radars can transmit electromagnetic waves that penetrate coal and rock media, thereby addressing the challenge of detecting and localizing personnel trapped in shielding environments during mine collapse. However, key parameters for UWB radar detection are difficult to determine due to complex mine environments, diverse media, and unclear dispersion characteristics. To deal with this issue, this study determined the frequency-dependent dielectric properties of various coal and rock media, as well as human tissues, through experiments and fitting. In combination with actual rescue scenarios, this study established the electromagnetic equivalent model of shielding environments in coal mines. …

A Method Of Reflected In-Seam Wave Imaging Based On The Structural Similarity Index Of Adjacent Gathers, Wang Ji, Wei Zhongli, Ye Hongxing, Wu Guoqing, Liu Shuo, Niu Huan, Su Xiaoyun

Coal Geology & Exploration

Background Reflected in-seam wave detection represents a major method for exploring geological anomalies in underground coal mines. This method is well suited to detecting concealed structures (e.g., faults and collapse columns) within coal seams in the tunneling direction of roadways or along their side walls. In recent years, to meet the safety requirements of green mine construction, explosive sources have been substituted with mechanical hammer impacts in increasing reflected in-seam wave detection. However, compared to conventional explosive sources, hammer impacts exhibit significantly lower instantaneous energy intensity and consistency. These limitations lead to reduced quality of reflected in-seam wave imaging, thus …

A Seismic Prediction Technology For Coalbed Methane Sweet Spots And Its Engineering Application In The Ordos Basin, Zhang Mengbo, Li Fei, Zhang Dong, Peng Jiankang, Cui Xiaojie, Ni Na, Long Shengfang, Tao Yu, Zhu Jun

Coal Geology & Exploration

Objective Deep coalbed methane (CBM) reservoirs tend to exhibit significant tuning effects of thin interbeds, leading to challenging localization of actual coal seam boundaries, limited identification accuracy of micro-amplitude structures in the coal seam roof, and poor stability of the seismic responses of the reservoirs' gas-bearing properties. To address these challenges, this study investigated the No. 8 coal seam of the Benxi Formation in the Mizhi area, Ordos Basin. Accordingly, a method with the prediction of gas-bearing properties as the primary controlling factor was developed for the seismic prediction and comprehensive evaluation of CBM sweet spots. Methods First, the actual …

Factors Influencing The Build-Up Rate Of Small-Diameter Rotary Steerable Systems In Underground Coal Mines, Yang Dongdong, Li Quanxin, Zhang Youzhen, Chen Long, Chu Zhiwei, Jiang Bici, Wang Bo, Yan Wenchao

Coal Geology & Exploration

Objective Intelligent drilling represents an important part of intelligent coal mine construction. However, measurement-while-drilling (MWD) directional drilling, the core of underground intelligent drilling operations, currently suffers from several limitations, including the high dogleg severity of wellbore trajectories, low drilling efficiency, and poor hard-rock penetration. Rotary steerable system (RSS) technology has emerged as a key approach to addressing these limitations owing to its high-precision control on drilling trajectories. Methods This study systematically analyzed the factors influencing the build-up rate of small-diameter, push-the-bit RSSs using a modified 3-point circle method and the longitudinal beam bending method. Through theoretical modeling, the coupled impacts …

Machine Learning-Based Diagnosis Of Fracture-Induced Lost Circulation And Intelligent Selection Of Lost Circulation Control Fluids, Sun Huan, Zhu Mingming, Wang Jinshu, Yao Lu, Zhou Fangfang, Tan Xuebin, Sun Yan, Qu Yanping, Chen Ning

Coal Geology & Exploration

Objective and Method Drilling operations in the Changqing area face several challenges in lost circulation, including complex types, significantly different characteristics, and difficulty in designing plugging formulations. To address these issues, this study proposes a DSX-Hybrid coupled intelligent decision-making framework, which serves as an integrated scheme to identify lost circulation channels, perform intelligent selection of plugging formulations, and offer recommendations on construction process. In this framework, given the scarcity of labeled log data, the density-based spatial clustering of applications with noise (DBSCAN) is employed to mine latent geological characteristics of unlabeled data. Then, the self-attention convolutional neural network (SACNN) is …

Information Literacy Through Open Pedagogy: What’S The Role Of Ai Tools?, Virginia Clinton-Lisell

Education, Health & Behavior Studies Faculty Publications

Student engagement in developing open educational resources (OER; openly licensed materials without fees to access) may be critically important for sustainable higher education and for developing important skills. There has been substantial debate about the use of generative artificial intelligence (GenAI) for the sustainability of OER, but little empirical inquiry. In this quasi-experimental study in the United States, two sections of college students (N = 113) collaborated with their instructor to improve the sources cited in an OER textbook. In one section, students only used traditional library databases to find suitable sources (traditional; n = 55). In another section, students …

The Mundlak Estimator In A Panel Data Model With Serially Correlated Error Component Disturbances, Badi H. Baltagi, Long Liu

Center for Policy Research

This paper shows that the classic Mundlak (1978) result where the random effects estimator reduces to the fixed effects estimator when the regressors are all correlated with the individual effects, may not hold if the remainder disturbances have a general serial correlation variance-covariance matrix. This includes the popular AR(1), MA(1) and ARMA(p, q) processes for serial correlation. This is illustrated with an empirical example for the AR(1) case.

Nursing Home Without Walls: A Nurse-Led Innovative Home Support Program, Suzanne Dupuis-Blanchard, Alisson Hache-Chiasson, Judy Freeze, Stephanie Lagosky, Andrea Piche, Danielle Theriault

International Nursing Research Congress (INRC)

The United Nations (UN) Decade of Healthy Ageing (1) and the World Health Organization Sustainable Development Goals (2) both focus on improving the lives of older adults. The UN Healthy Ageing 50 (3) recently recognized global leaders who have demonstrated concrete actions to meet the needs of older adults and one such initiative is the nurse-led [Blinded Program Name] program (4).

Evidence-based and asset-based community development informed (5), [x] provides resources to long-term care facilities for them to provide services to older adults and caregivers in the community. The objectives of the program are to: 1) ensure access to appropriate …

Identity And Cultural Humility Bring A Sense Of Belonging To The Nursing Workforce, Patricia Fernandez, Victoria Ngo, Kupiri Ackerman

International Nursing Research Congress (INRC)

Background: Cultural humility frameworks (Tervalon & Murray-García, 1998) are widely used in clinical and professional development settings, however, little empirical evidence exists regarding their impact on teenagers and young adults. As pathway programs emerge to strengthen and diversify the healthcare workforce, understanding whether cultural humility training is developmentally appropriate and impactful for early-career learners is crucial for growing and retaining future nurse leaders.

Methods: As part of a summer pathway program designed to prepare young scholars for a career in healthcare or nursing, we offered a three-day institute that helped students from historical redlined areas to understand the unique and …

Adherence To Evidence-Based Practice In Childhood Immunization: A Mixed-Methods Study, Lydia Boampong Owusu

International Nursing Research Congress (INRC)

Immunization is one of the most effective public health measures for preventing infectious diseases in children (Baidya et al., 2024). Immunization safety and effectiveness depends on proper injection site management (Rishovd, 2014; World Health Organization, 2018). Globally, Evidence-Based Practices (EBP) are recommended to enhance immunization effectiveness and minimize unwanted side effects (Cataldi et al., 2020). However, there is a dearth of empirical evidence on healthcare provider adherence to EBP in injection site management which presents a significant knowledge gap, especially in developing countries. This study assessed the experience and understanding of healthcare providers' adherence to EBP in administering childhood vaccines …

Experiences Of Nurses Managing Traumatic Hemorrhagic Shock At A Tertiary Hospital In Ghana, Gloria Achempim-Ansong, Princilla Mensah

International Nursing Research Congress (INRC)

Background: Traumatic hemorrhagic shock is a life-threatening condition requiring immediate and effective management by emergency department nurses. Globally, trauma accounts for approximately 5.8 million deaths annually, with hemorrhagic shock contributing to 30-40% of these fatalities. The management of traumatic hemorrhagic shock in the emergency department is a complex and challenging task that requires a multidisciplinary approach and specialized nursing care. Nurses play a critical role in the early recognition, assessment, and stabilization of patients with traumatic hemorrhagic shock, as they are often the first healthcare professionals to encounter these patients in the emergency department.

The incidence of traumatic injuries and …

Redesigning Women’S Health Nurse Practitioner Curricula: Defining Population-Specific Competencies, Mary T. Hickey, Mary Fischer

International Nursing Research Congress (INRC)

Background: In 2019, the American Association of Colleges of Nursing (AACN) introduced a new vision for nursing education emphasizing competency-based education (CBE) to enhance preparation of a practice-ready Nurse Practitioner (NP) workforce¹. The National Organization of Nurse Practitioner Faculties (NONPF) developed NP Role Core Competencies based on the new AACN Essentials. For Women’s Health Nurse Practitioners (WHNPs), defining population-specific competencies is essential to preparing practitioners who can meet the complex needs of women and gender-related health populations⁴.

Purpose: This initiative sought to identify NP core and population-specific behaviors to equip faculty with the tools for redesigning …

A Theoretical Roadmap For Understanding And Mitigating Nursing Incivility, Janet Givler, Lynn Varagona

International Nursing Research Congress (INRC)

Nurse-to-nurse incivility remains a persistent threat to psychological safety, professional relationships, and patient outcomes. Despite growing reliance on cognitive rehearsal training as a targeted strategy, studies suggest incivility is a multidimensional issue shaped by individual behavior, organizational culture, leadership practices, and socio-behavioral forces. This integrative review examined how nine theoretical frameworks collectively deepen understanding of nursing incivility and illuminate a comprehensive, multilevel approach to intervention.

Twenty-one studies published between 2018 and 2023 and retrieved from CINAHL, Medline, ProQuest, and Ovid were appraised using the Johns Hopkins Evidence-Based Practice Model [1]. Braun and Clarke’s thematic analysis guided data synthesis. Oppression Theory …

Interactive Insights: Using Kwla-R© To Spark Active Learning And Reflection In Nursing, Amanda Adams

International Nursing Research Congress (INRC)

Active learning within nursing education assists in the engagement and retention of knowledge among students (Bristol et.al, 2019). The Know, Want to Know, Learned, Application – Reflection (KWLA-R) teaching tool was implemented as an innovative strategy for prework and active learning within a concept-based nursing curriculum. This approach aimed to promote active engagement and critical thinking through scaffolding knowledge (Coffman, et. al, 2023). The adaptation was executed in a hybrid format: students first completed the initial half of the KWLA-R as a ticket prior to the didactic session, answering what they already knew and what they wanted to learn about …

Harnessing Synergy: Advancing Nursing Scholarship Development, Fang-Yu Chou

International Nursing Research Congress (INRC)

Producing scholarly work is a core expectation of academic faculty in higher education, alongside responsibilities in teaching, service, curriculum development, and academic advising. The American Association of Colleges of Nursing defines academic nursing as the integration of practice, education, and research within baccalaureate and graduate programs. Nursing faculty are therefore expected to demonstrate a commitment to inquiry, generate new disciplinary knowledge, connect practice with education, and lead scholarly endeavors that advance health and health care. Yet, barriers such as limited funding and institutional support, overloaded teaching schedule and service duties, insufficient skills and knowledge in research, and role conflict between …

Dataset For Effects Of Demineralization Protocols On Hydrogen And Oxygen Isotope Ratios In Fossil Bone Collagen, Linda M. Reynard

Geosciences Research Data

This dataset accompanies a peer-reviewed publication. The effect of three commonly used preparation protocols on bone collagen d2H and d18O values was investigated, using six generally well-preserved faunal bones (cattle, bison, horse) ranging in age from the Holocene to Late Pleistocene. The treatments tested were ethylene diamine tetraacetic acid demineralization without gelatinization and hydrochloric acid demineralization with and without gelatinization. There were small d2H changes noted by method; however, given the expected water isotopic variation among labs this should be an insignificant source of inter-lab variation.

Information Revelation In Constant-Sum Games: Elections And Beyond, Navin Kartik, Francesco Squintani, Katrin Tinn

Cowles Foundation Discussion Papers

Do elections aggregate the private information of office-motivated candidates? Our answer stems from a general result for two-player constant-sum Bayesian games with type-independent payoffs. Under a “completeness” statistical condition, every “identifiable” equilibrium is an ex-post equilibrium. Applied to Downsian elections, the ex-post property implies a sharp bound on information aggregation: equilibrium voter welfare is at best equal to the efficient use of a single candidate’s information. In canonical specifications, politicians may “anti-pander” (overreact to their information), whereas some degree of pandering would be socially beneficial. We discuss other applications of the ex-post result.

Welcome To Nontechnically Speaking, Aubrey R. Paris

Nontechnically Speaking Substack

This first issue of the Nontechnically Speaking Substack features an article written by Parlee Center Director Aubrey R. Paris entitled “Modeling Scientific Thought Leadership Through the Lens of Liberal Arts.” It also announces the fall 2026 speaker series and other upcoming events and programs.

Does Cardiopulmonary Bypass Influence Outcomes In Stage 2 Palliation? A Meta-Analysis And Systematic Review, Abdullah Almehandi, Yahya Ali, Adel Altarkait, Mohammad Alhajri, Abdulrahman O. Al-Naseem, Ahmed A. Jamjoom, Hamood Al Kindi, Saif Awlad Thani

Sultan Qaboos University Medical Journal

Objectives: The bidirectional Glenn (BDG) procedure, a key palliative intervention for single-ventricle physiology, is conventionally performed using cardiopulmonary bypass (CPB) despite its associated complications and costs. However, the comparative impact of CPB versus off-pump techniques on perioperative safety, neurological risk and long-term outcomes remains controversial. Therefore, this meta-analysis aimed to determine whether performing the BDG procedure without CPB improves perioperative outcomes (including morbidity, mortality, and neurological events), resource utilisation, and long-term survival compared to the conventional on-pump approach. Methods: This review systematically searched PubMed, EMBASE and Cochrane Central from inception until January 2025 for comparative randomised and observational studies reporting …

Advancing Paternal Perinatal Mental Health: Integrating Qualitative Evidence, Theory, And Measurement Science, Rachael Elizabeth Schmitz

Nursing and Health Sciences

Aim: To advance understanding of paternal perinatal mental health through the integration of qualitative evidence, mid-range theory, and conceptual framework development.

Background: Existing scholarship largely emphasizes prevalence and symptom identification of paternal post partum depression, with limited integration of fathers lived experiences into theory development and assessment frameworks, and mental health nursing practice. Greater integration of qualitative evidence, theory, and measurement science may strengthen the recognition and assessment of paternal distress.

Methods & results: This integrative paper synthesizes findings from a phenomenological study of fathers with postpartum depression, the Reciprocal Adaptation in Postpartum Fathers mid-range nursing theory, and the P- …

Eece310w Oer Syllabus, Daisuke Akiba

Open Educational Resources

This course has been designated Zero Textbook Cost (ZTC) under the CUNY OER Initiative.

Fast-Track Ode: A Student-Centered, Game-Based Summer Differential Equations Course, Chamila D. Malagoda Gamage

CODEE Journal

This article describes a student-centered and game-based redesign of an Elementary Differential Equations course taught during a six-week summer session. In this compressed setting, students had to move through the standard course content quickly while still developing procedural fluency, conceptual understanding, and confidence with applications. To support these goals, the course used real-time feedback tools, collaborative problem solving, applications connected to students' fields, and mathematical games. The paper describes the course context, major activities, implementation details, and student feedback. Student responses suggest that the activities were well received and helped students stay engaged, participate regularly, prepare for exams, and see …

Pellissippi State Community College For The Year Ended June 30, 2024, Tennessee. Comptroller Of The Treasury.

Financial and Compliance Audit Reports

No abstract provided.