Digital Commons Network^™

Mechanisms And Implications Of The Novel Cast Model Of Coal Graphitization, Wang Shaoqing, Zhang Jingzhe, Zhang Xiaomei, Wang Xiaoshuai, Chen Hao, Wang Xiaoling, Li Wu, Tang Yuegang

Coal Geology & Exploration

Objective and Methods Coal graphitization is a multi-stage process with abrupt changes rather than linear evolution. So far, its inherent driving mechanisms have not yet been fully elucidated. Notably, twisted graphene was observed in the process of coal graphitization in 2025, providing a new opportunity to reveal the essence of this structural transformation. Results and Conclusions By combining previous research results, this study proposes a novel coal graphitization model that consists of condensation, alignment, stacking, and twisting (CAST). The four parts of the CAST model are organically integrated, collectively forming a continuous and dynamic evolutionary process. Most especially, no absolute …

Spatial Topological Configurations Of Cleats And Geometrical Quantitative Characterization Of Matrix Blocks In Deep Coal Seams, Shen Jian, Li Wei, Tian Yongjing, Ma Tianyu, Zhang Hewei, Dong Jiying, Zhu Peipei

Coal Geology & Exploration

Objective Cleats in deep coal seams are characterized by strong heterogeneity, and their topological configurations, as well as their topological relationships with matrix blocks, remain poorly understood. On the other hand, the assumptions regarding the size and geometry of matrix blocks adopted in representative reservoir structure models and numerical simulations do not fully reflect actual reservoir conditions. Methods Deep coal cores collected from the northeastern Ordos Basin were investigated in this study. Using CT scanning and topological theory, a multi-dimensional topological parameter system was established to characterize cleats in deep coal seams. Furthermore, four topological configurations of cleats in deep …

Stable Isotope-Based Origin Identification And Enrichment Zone Division Of Medium- To Low-Rank Coalbed Methane, Wang Qiong, Xu Fengyin, Ren Pengfei, Xu Hao, Lu Pengda, Hu Han, Zhou Siyuan

Coal Geology & Exploration

Objective Medium-to low-rank coalbed methane (CBM) exhibits complex origins with significant vertical differentiation, leading to unclear origin identification and enrichment patterns. This study aims to determine the genetic mechanisms, enrichment patterns, and efficient exploitation pathways of medium- to low-rank CBM. This will help improve the theoretical system for the exploration and exploitation of such CBM. Methods CBM data from 14 typical low- to medium-rank coalfields and coal-bearing basins across the world were comprehensively analyzed, including CBM compositions C₁/(C₂+C₃), carbon and hydrogen isotopes of CH₄ (δ¹³C-CH₄ and δD-CH_{4 …}

Dynamic-To-Static Elastic Parameter Conversion Models For Coals Under Temperature-Pressure Coupling: A Case Study Of The No. 8 Coal Seam In The Daning-Jixian Block, Zhang Wei, Wu Peng, Liu Conghui, Zhang Sidun, Sun Xuedong, Yang Haixing, Ma Zhuang, Shi Rui, Shen Jian

Coal Geology & Exploration

Objective Existing dynamic-to-static elastic parameter conversion models for coals fail to fully account for the actual in situ pressure and temperature conditions of deep reservoirs. This leads to significant deviations in directly evaluating the mechanical properties of reservoirs using log-derived dynamic parameters. To address this challenge, this study investigated dynamic-to-static elastic parameter conversion under the in situ stress and geotemperature conditions of strata. Accordingly, high-precision parameter conversion models were established. Methods This study examined coal samples from the No. 8 coal seam at a burial depth of approximately 1200 m in the Daning-Jixian block along the eastern margin of the …

A Geochemical Evaluation Method For Geological Sweet Spots Of Marine-Continental Transitional Shale Gas: A Case Study Of The Shan$^3_2 $ Sub-Member, Eastern Margin Of The Ordos Basin, Zhu Xingcheng, Li Yong, Lu Jungang, He Qingbo, Li Shuxin, Xiao Zhenglu, Li Xiang, Jiang Qijun

Coal Geology & Exploration

Background China boasts abundant marine-continental transitional shale gas resources. However, marine-continental transitional shales in the country exhibit complex geological conditions characterized by rapid lateral facies transition, vertical superimposition of multiple lithologies, and small single-layer thickness. These characteristics pose a challenge to shale gas sweet spot prediction. Therefore, establishing a sweet spot grading and evaluation system tailored to these shales is of great significance for guiding decision-making in hydrocarbon exploration and supporting large-scale production. Methods Based on core observations, this study systematically evaluated the geochemical characteristics of marine-continental transitional shales in the 3rd submember of the 2nd member of the Permian …

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, …

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. …

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 …

August 25, 2026 Ereporter, University Of Alabama At Birmingham

eReporter (campus newsletter)

No abstract provided.

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 …

2026 Final Insufficiently Reclaimed Sites Quality Assurance Project Plan (Qapp), Pioneer Technical Services, Inc.

Silver Bow Creek/Butte Area Superfund Site

Insufficiently Reclaimed sites exist within the Butte Priority Soils Operable Unit (BPSOU) that could pose a threat to human health or surface water quality due to the exposure of historical mine waste. Although many source areas have been previously reclaimed, areas exist where reclamation was completed prior to the establishment of the Butte Hill Revegetation Specifications (BHRS) or reclaimed areas that have failed consecutive Butte Reclamation Evaluation System (BRES) inspections and now fall into either the Insufficiently Reclaimed or Reclamation Improvement category. In all these cases, additional work is required to comply with the BHRS to ensure the cap remains …

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 …

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- …

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.

Spartan Daily, August 25, 2026, San Jose State University, School Of Journalism And Mass Communications

Spartan Daily, 2026

Volume 167, Issue 02

Staff Members And Students’ Perceptions On Retention In A Trio Student Support Services Program, Gregoire N. Lee

Walden Dissertations and Doctoral Studies

The problem that was addressed in this study was the low retention rates and consequent low completion rates of students who are low-income, first-generation, and/or disabled who did not participate in a TRIO Student Support Services (SSS) program at Urban University. Grounded in Tinto’s student integration theory, Dweck’s mindset theory, and Duckworth’s grit theory, the purpose of this study was to determine staff members and students’ perceptions on the helpfulness of the TRIO SSS program in improving retention from Year 1 to Year 2 at Urban University. For this basic qualitative design, semistructured interviews with nine students and four staff …

Eece310w Oer Syllabus, Daisuke Akiba

Open Educational Resources

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

When Childcare Becomes A Crime Space In Contemporary Indonesia, Isyana Kurniasari Konoras, Dr. Dra. Vinita Susanti, M.Si

Jurnal Kriminologi Indonesia

Abstract. The increasing incidence of violence against children in daycare institutions reflects a structural crisis in contemporary child protection systems. This study examines the violence case at Little Aresha Daycare in Yogyakarta to identify the criminogenic factors underlying abuse in institutional childcare settings. The research applies a normative-empirical qualitative method through media-based case studies, legal analysis, and criminological interpretation. The findings demonstrate that violence emerged from the convergence of three major factors: structural strain experienced by caregivers, weak capable guardianship within daycare institutions, and the normalization of abusive disciplinary practices. Robert K. Merton’s Strain Theory explains how economic and occupational …

Methamphetamine Trafficking In Indonesia: A Routine Activity And Situational Crime Prevention Perspectives, M Fadli Makarim

Jurnal Kriminologi Indonesia

Abstract. Methamphetamine trafficking represents one of the most significant forms of transnational organised crime affecting Indonesia and appears to be facilitated by Indonesia’s strategic position within global maritime trade networks. Existing explanations have emphasised law enforcement capacity and policy responses, while less attention has been given to the opportunity structures that may facilitate trafficking activities. This study examines how Routine Activity Theory may contribute to explaining methamphetamine trafficking in Indonesia and considers its implications for Situational Crime Prevention. This study employed a structured literature review based on a systematic semantic search of publications indexed in Semantic Scholar and OpenAlex. The …

The Banality Of Evil And Delayed Rehabilitation: Uncovering Post-1965 State Crime Through The Lens Of Decolonial Criminology, Farhan Arif Sumawiharja, S.H., M.Si., M.Krim

Jurnal Kriminologi Indonesia

This study sets out to reconstruct the history and structural repression that followed the 1965–1966 events in Indonesia—events that have long been reduced to a simple “horizontal conflict” between ordinary citizens. Using a socio-historical method, the study examines a wide range of historical literature and documents in order to reframe this violence as a State Crime, seen through the lenses of Critical Criminology and Decolonial Criminology. The findings show that the New Order regime borrowed the tools of subjugation first developed in the colonial era to crush progressive groups—a project that, in essence, served the interests of global capitalism during …

Criminalizing Environmental Defenders In Indonesia’S Extractive Development: A Green Criminology Perspective, Raihan Muhammad

Jurnal Kriminologi Indonesia

This article examines how extractive development in Indonesia contributes to the criminalization of environmental defenders from a green criminology perspective. The study departs from the growing trend of intimidation, criminalization, violence, and legal retaliation experienced by communities resisting environmentally destructive projects in mining, coastal reclamation, plantation expansion, and National Strategic Projects (PSN). Using a qualitative socio-legal approach, this research analyzes statutory regulations, policy instruments, court decisions, academic literature, civil society reports, and documented cases related to environmental conflicts and environmental defenders in Indonesia. Data were collected through a literature review and document analysis, then analyzed using qualitative content analysis within …

Symbolic Reform And Police Legitimacy In Indonesia, Nur Zena Anggita Raissa

Jurnal Kriminologi Indonesia

The Indonesian National Police (Polri) are facing a sustained crisis of legitimacy amid increasing public distrust, digital activism, and intensified external oversight. While reform has been repeatedly promised since the post-authoritarian transition, institutional change remains fragmented and largely symbolic. This article examines Polri’s reform trajectory through a criminological lens, drawing on theories of social solidarity (Durkheim), procedural justice (Tyler), and the sociology of professions (Abbott) to analyze the interaction between external pressures and internal organizational dysfunctions. Using theory-driven qualitative analysis of corruption cases, recruitment controversies, and public trust surveys, the study argues that Polri’s legitimacy crisis is rooted not only …

Key Technologies And Their Application Of Vertical Large Models For Geological Guarantee In Coal Mining, Liu Zaibin, Fan Tao, Liu Borui, Chen Changyuan, Li Guihong, Li Wei, Jing Xiaotian, Li Xiping, Du Yiming

Coal Geology & Exploration

Background General-purpose large language models (LLMs) have remarkable capabilities in natural language understanding and complex-task reasoning. However, when applied to geological guarantee in coal mining, these models still suffer from several inherent limitations, including insufficient professional geological knowledge, limited insights into industrial terminology, and inadequate integration of engineering logic and rules. Consequently, they face challenges in accurately capturing domain-specific knowledge and reasoning mechanisms required for geological interpretation, early warning of disasters, and decision-making for disaster prevention and control. These issues lead to limited applicability and reliability of general-purpose LLMs. On the other hand, geological guarantee in coal mining involves multi-source …

Microstructure Evolution Characteristics Of Coal Briquettes During Hot Pressing Carbonization And A Temperature Control Method, Gan Qingqing, Xu Jiang, Peng Shoujian, Cai Guoliang

Coal Geology & Exploration

Objective Coal briquettes used for physical simulations of gas disasters in coal mines generally exhibit low strength and high permeability. To address this challenge, this study developed a new hot pressing process and a temperature control method to optimize the mechanical and seepage performance of coal briquettes. Methods First, an optimal mixing ratio scheme was determined based on the Horsfield close-packing theory, and coal briquettes were prepared at different temperatures using an independently developed hot pressing system. Subsequently, the microstructure evolution patterns of the hot-pressed coal briquettes were characterized using an X-ray diffractometer (XRD), an X-ray photoelectron spectrometer (XPS), a …

3d Geological Modeling And Its Application For Steeply Dipping Coal Seams In The Miquan Area, Xinjiang, Wu Luofei, Li Yong, Zhang Weiqi, Han Yiyang, Zhang Jie, Cao Mingliang, Li Qiang

Coal Geology & Exploration

Background Influenced by multi-stage compression from the North Tianshan and Bogda mountains, the southern margin of the Junggar Basin in Xinjiang exhibits the widespread development of steeply dipping coal seams. The extreme stratigraphic occurrence, combined with complex structural superimposition styles, poses significant challenges to the fine-scale characterization of these coal seams. Correspondingly, the planar and regional distribution patterns of gas content in these coal seams remain poorly understood, rendering it difficult to effectively determine the sweet spots of coalbed methane (CBM). Methods Focusing on the Miquan area, Xinjiang, this study investigated the methodology for 3D geological modeling of representative steeply …

Evolutionary Characteristics And Fine-Scale Zoning Of Overburden Fractures For Pressure-Relief Mining Of Soft Coal Seams, Wang Long, Deng Zhiliang, Zhang Zongxiang, Guo Baohua, Tan Hongchen, Zhao Pengtao, Hu Longsheng

Coal Geology & Exploration

Objective During the mining of coal seam groups, substantial gas is prone to rush into the mining face from adjacent coal seams through interconnected mining-induced fractures. This poses a threat to safe coal mining. Under pressure-relief mining of soft coal seams, their low permeability and high stress sensitivity present challenges to the successive mining of protective and protected coal seams. Specifically, mechanisms behind the overburden fracture evolution remain poorly understood, and it is difficult to identify preferential pathways for gas migration accurately. Methods This study investigated coal seam groups in the Jiahe mining area of Hunan Province as the engineering …

Sources And Occurrence Patterns Of Hydrocarbons In The Surrounding Rocks Of Coal Seams: A Case Study Of The Jurassic Yan'an Formation In The Xinzhuang Mine Field, Longdong Area, Zhang Peng, Chen Dongdong, Zhao Junfeng, Zheng Kaige, Wang Chunxin, Zhou Xingtian

Coal Geology & Exploration

Objective and Methods This study aims to ascertain abnormal hydrocarbon outflows from the surrounding rocks of coal seams in the Jurassic Yan'an Formation within the Xinzhuang mine field in the Longdong area, southwestern Ordos Basin. Based on the fundamental principles of petroleum geology, sedimentology, and coal geology, this study systematically analyzed the sources, occurrence patterns, and primary controlling factors of hydrocarbons in the surrounding rocks of coal seams using methods including core observation, sample analysis, and statistical mapping. Results and Conclusions In the Xinzhuang mine field, hydrocarbon outflows are primarily identified in the floor of the No. 8 coal seam …

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 …