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Deciphering The Nexus: Blockchain-Smart Contracts And Their Transformative Potential In The Construction Industry, Hossam Wefki, Mona Salah, Hamdy Mostafa Elsharkawi

Journal of Engineering Research

The construction industry, characterized by its intricate processes and extensive stakeholder networks, stands at the cusp of a digital revolution. The adoption of blockchain-smart contract (BCSC) technology is at the heart of this transformation. This research delves deep into the BCSC within the construction arena to provide comprehensive insight into its probable applications, inherent challenges, and potential future trajectories. Leveraging the PRISMA analysis technique, a curated collection of relevant academic research articles was assembled, shedding light on the existing body of knowledge regarding the application of BCSC technology in construction. The authors developed an innovative user interface tool customized to …

Design And Implementation Of A 2.4 Ghz Millimeter Wave Radar System For Soil Water Content Detection, Amr Hussein, Ahmed M. Elkhawaga, Hossam Mohamed Kasem, Mohamed Dabaon

Journal of Engineering Research

Because water has the highest real permittivity value, close to 80, compared to dry soils' real permittivity, which ranges from 3 to 15, measuring a soil's permittivity is strongly reliant on its moisture content. Furthermore, increased relative permittivity leads to a larger reflectivity coefficient. According to these perspectives, adding water to dry soil generates notable changes in wet soil permittivity and modifies the reflectance and characteristics of incident electromagnetic waves (EMWs) at the soil-air interface. Thus, the soil water content (SWC) may be reliably determined by recording variations in the properties of incident EMWs compared to a reference dry soil …

Green Buildings On The Egyptian Coast: Prospects And Obstacles, Moataz M. Abdel-Aziz, Riham Salah

Journal of Engineering Research

Egypt's 2030 Sustainable Development Strategy seeks to add 140 million people to the nation's population by 2050. This expands the built environment, which raises the demand for energy and natural resources. Due to the current extreme weather conditions and advancements in construction technology, which have contributed to the squandering of natural resources. The need for comfort inside structures has grown pressing among residents. nonetheless, without raising prices or diminishing resources.Recent years have seen a rise in the use of the term "green building" (GB) due to the fact that it provides workable solutions to pressing global concerns like the depletion …

Achieving Sustainability Through Multifaceted Green Functions In Manufacturing, Aamir Rashid, Rizwana Rasheed, Abdul Hafaz Nagah

Publications and Research

Purpose – Green practices are essential for sustainability. However, it is challenging due to the socioeconomic and environmental concerns. Similarly, after the induced SDG-12 and SDG-13 by United Nations, the pressure groups forced manufacturers to consider sustainability. Therefore, this research aims to examine the sustainability through multifaceted green functions in manufacturing is examined. Design/methodology/approach – Data were collected from 293 supply chain professionals of manufacturers from a developing economy. Hypotheses were tested through a quantitative method using partial least squares-structural equationmodelingwith the help of SmartPLS version 4 to validate themeasurementmodel. Findings – The findings revealed that all six direct hypotheses …

Assessing Organizational Policy: Preferred Practices For Regulating Vaping In The Work Environment, Ayesha T. Kirk

Theses and Dissertations

Employee vaping negatively affects organizations in terms of costs, productivity, employee health, and workplace safety. The purpose of this qualitative dissertation study was to assess organizational policies to determine preferred practices to regulate vaping in the work environment. Open-ended questionnaires with 18 human resources administrators, combined with a literature review, yielded data on best practices for organizational policies regulating vaping in the work environment.

The data collected in this qualitative dissertation study were extracted from a structured survey questionnaire comprising 16 questions about vaping and tobacco usage in the workplace. The findings demonstrated that vaping and the use of tobacco …

A Phenomenological Study Of Barriers And Needs Related To Opioid Prevention, Treatment, And Recovery In Rural Alabama, Joshua C. Eyer, Cho Rong Won, Megan Sawyer, Yan Luo, Kun Wang, Edson Chipalo, Gwen Thomas-Leblanc, Hee Lee

The Qualitative Report

Rural areas with limited access to preventive care, treatment, and recovery services are particularly affected by the opioid crisis. This study identified four rural areas in Alabama that had higher opioid prescription rates than the state and national average. This study explores the views of three groups [healthcare service providers, persons who use/used opioids (PWUO), and community stakeholders] on the barriers to and needs for opioid prevention, treatment, and recovery services using a phenomenological qualitative design. Purposeful and snowball sampling was used to recruit 95 participants across 12 focus groups which were audio-recorded and transcribed verbatim. A seven-member analysis team …

Numerical Simulations Of Enhancing Permeability And Gas Extraction Of Thick Coal Seams Through Static Fracturing, Wang Xinfeng, Liu Wengang, Wang Long, Wei Youyu, Zhang Qiao

Coal Geology & Exploration

This study seeks to improve the underground operation efficiency and optimize the borehole arrangement parameters for static fracturing of coal seams. To this end, this study conducted tests in the belt roadway of the No. 12316 fully mechanized mining face in the Wangjialing Coal Mine, China Coal Huajin Group. By combining the equations for coal seams’ deformation and failure, gas diffusion and seepage, and coal seams’ permeability evolution, this study constructed a model of the damage and permeability evolution of coal seams. Based on the numerical simulations of the process of static fracturing and permeability enhancement of coals, as well …

Genetic Type And Gas-Generating Potential Of Coalbed Methane In The Bayanhua Sag, Erlian Basin, Meng Qin, Li Ling, Li Jie, Tian Wenguang, Lin Haitao, Li Heng

Coal Geology & Exploration

The Bayanhua Sag in the Erlian Basin is a critical experimental area for coalbed methane (CBM) development from low-rank coals in Inner Mongolia. However, the relatively low exploration level and the limited understanding of the CBM origin in the sag restrict the CBM exploration and development to some extent. This study tested the gas components, stable isotopes and hydrochemistry of the gas and water samples from CBM wells in the Bayanhua Sag. It also conducted radioisotopic dating for these samples. By combining the classic charts for the identification of natural gas origin, this study clarified the gas origins, further analyzed …

Dynamic Prediction Method Of Tunnel Water Inflow Based On Detailed Depiction Of Complex Geological Bodies, Du Yajun, Li Qingbo, Wan Weifeng, Yang Fengwei, Li Yazhe, Qian Hui

Coal Geology & Exploration

It is a challenge to accurately characterize the irregular geological bodies and underground structures such as inclined faults and inclined tunnels during the numerical simulation of tunnel water inflow prediction, and the prediction generally assumes that the tunnel excavation is completed instantaneously without considering the construction progress. A dynamic prediction method for tunnel water inflow based on precise characterization of complex geometric bodies was proposed by addressing the non-self-intersection and watertight issues required in the coupling process of three-dimensional (3D) geological models and 3D groundwater numerical models. Specifically, a sealed boundary interface of inclined tunnels, shafts, inclined faults and irregular …

Experimental Study On Proportioning Of Ultra-High Strength Similar Materials For Large Similarity Ratio Model Tests, Zhan Xinyu, Gao Lin, Zhao Fanghao, Wang Yongyin, Liu Ping, Han Sen

Coal Geology & Exploration

Similar simulation of physical material is a common research method in the field of geotechnical engineering. Selecting appropriate similar materials and determining their proportions is the key to successfully simulating the prototype project. Existing similar materials are mostly developed for similar simulation with small geometric similarity ratio (1∶250-1∶25). These materials generally have low strength (0.2-7.6 MPa), making it difficult to meet the requirements of large similarity ratio model. Therefore, in order to prepare an ultra-high strength similar material with a strength of more than 10 MPa suitable for large similarity ratio model, river sand, barite, gypsum, and cement with different …

On-Line Compensation For Geomagnetic Error While Drilling Based On Magnetic Inertial Slime Mould Algorithm, Yang Jinxian, Cai Jipeng

Coal Geology & Exploration

In response to the serious distortion of the azimuth angle of the drilling tool caused by the large measurement error of strap-down micro-electro-mechanical-system (MEMS) magnetometer on the drilling tool in the measurement-while-drilling (MWD) environment, an online compensation method for the geomagnetic error of the drilling tool based on the magnetic-inertial slime mould algorithm (MISMA) was proposed. Firstly, the geomagnetic measurement error compensation model of the drilling tool was established through the analysis on the output error of the magnetometer, and the magnetometer error parameters were sorted into solution vectors. Then, the objective function of the ideal magnetic output data, the …

Make A Difference: Choose Artificial Reefs Over Natural Reefs To Compensate For The Environmental Impacts Of Dive Tourism, Louise B. Firth, Mark Farnworth, Keiron P.P. Fraser, Abigail Mcquatters-Gollop

School of Biological and Marine Sciences

In the marine environment, natural reef habitats are amongst the most threatened by human activities. Although reef-based ecotourism can benefit local economies, dive tourism can damage sensitive habitats. One solution to managing conflicts between the economic value of diving and its ecological threats is the deployment of artificial reefs near popular dive sites. We surveyed recreational divers to assess divers' use, preference, and perceptions of diving artificial versus natural sites. We found that more divers prefer to dive in natural than artificial habitats, with associated biodiversity the most popular reason for preferring natural habitats, and appreciating shipwrecks the most popular …

Beyond The Digital Transformation In Omnichannel Transitions: A Scoping Review, Joanna Radomska, Monika Hajdas, Przemysław Wołczek, Arkadiusz Kawa

European Management Studies

Purpose: We aim to grasp the various facets of shifts towards omnichannel and identify the gaps uncovered by extant scholarship Design/methodology/approach: The research approach is based on a scoping review to investigate the scope of literature on omnichannel transition. Promising avenues for future research were outlined based on the qualitative analysis of extant research. Findings: Based on the scoping review, we identified and proposed further avenues of research. The first avenue explored what makes the transition from single channel to omnichannel a gradual process or an immediate shift rooted in managerial cognition. The second avenue was exploring the transformation process …

Obstacle-Avoidance Trajectory Planning Of Mine Drilling Robot During Drill Pipe Loading And Unloading, Yao Yafeng, Yao Ningping, Peng Tao, Liang Chunmiao, Peng Guangyu

Coal Geology & Exploration

The position of drill pipe loading and unloading by mine drilling robot will change with the attitude adjustment of the host machine, and obstacles are present in the loading and unloading path of drill pipe. Therefore, there is a problem of obstacle-avoidance trajectory planning with variable targets in the loading and unloading of drill pipe. For this reason, the DH parameter table was created according to the performance parameters of the explosion-proof 6-DOF manipulator, and the function relation of the change in loading and unloading position of drill pipe before and after the attitude adjustment of the 3-DOF host machine …

Stress Field Of High-Temperature Wellbore Under Spray Cooling For Underground Coal Gasification, Tang Yang, Xie Na, Xiong Haoyu, He Yin, Huang Shunxiao

Coal Geology & Exploration

As a supplement to traditional physical coal mining technology, underground coal gasification (UCG) is a new generation of chemical coal mining technology. During the gasification, the wellbore of UCG production wells is subjected to the combined action of high temperature and internal pressure loads. Targeting the structural characteristics of the wellbore of UCG production wells, this study, based on the heat transfer theory, established a calculation model for the transient temperature of the wellbore under the cooling through annular spray water injection. By combining the wellbore pressure model, as well as the elasticity theory and the wall cylinder theory, this …

Robust Design And Best Control Channel Selection Of Facts-Based Wadc For Improving Power System Stability Using Grey Wolf Optimizer, Iraj Faraji Davoudkhani, Mahmoud Rerza Shakarami, Almaotaz Y. Abdelaziz, Adel El-Shahat

Purdue University Libraries Open Access Publishing Fund

With recent advances in wide-area measurement systems (WAMS), wide-area damping controllers (WADCs) based on remote signals can effectively damp inter-area oscillations. However, these signals are inherently subjected to communication time-delay which may adversely affect the damping of inter area oscillations. The purpose of this paper is to present a optimization-based method for designing a WADC for a static synchronous series compensator (SSSC) to improve the damping of inter-area oscillations by considering the time delays of remote control signals. For this aim, the control gain value of the WADC, shifting of the critical modes to a desirable area, and the maximum …

Low-Carbon Frontier: Renewable Energy And The New Resource Boom In Western China, Tyler Harlan

Urban and Environmental Studies Faculty Works

China's west has long been framed as an undeveloped frontier, set apart by poverty and a resource-based economy. Since the 2000s, however, utility-scale renewable energy infrastructure has expanded rapidly in western China, promising local economic benefits tied to national low-carbon transition. This paper contends that these benefits have been precarious and unevenly distributed. I argue that utility-scale renewable energy has remade western China as a “low-carbon frontier,” a resource-rich region that generates low-carbon value for the national green economy. I highlight three features of low-carbon frontiers: they are constructed as spaces of exploitable low-carbon resources, creating an investment boom; they …

Twelve Wallace Myths, Charles H. Smith

Faculty/Staff Personal Papers

Alfred Russel Wallace’s (1823-1913) bicentennial year is a good time to take stock. In this presentation I discuss twelve Wallace-related issues that I feel have been poorly taken up. These range from the biological to the biographical, including subjects such as social criticism, human evolution, autobiographical memory, natural selection, national affinities, spiritualism, and wokeism.

Table Of Contents, The Editors

Coal Geology & Exploration

No abstract provided.

A Simulation Study On The Suspension And Transport Patterns Of Proppants In Long Distance Pipelines For Integrated Well And Ground Fracturing, Li Haozhe, Jiang Zaibing, Sun Siqing, Zhu Chuanyong, Fan Yao, Guo Yong, Cheng Bin

Coal Geology & Exploration

Integrated well and ground fracturing is a developmental trend for the staged fracturing of underground long boreholes in coal mines. Using the integrated fracturing technology, the fracturing fluids, after being pressurized using a ground fracturing pump, enter long boreholes in underground coal mines through ground penetrating wells and long distance pipelines, aiming to achieve fracturing with high injection rates of fracturing fluids. The suspension and transport patterns of proppants in long distance pipelines hold critical significance for optimizing parameters related to proppant adding and avoiding sand plugging in pipelines. This study evaluated the rheological properties and proppant carrying capacity of …

Numerical Simulations Of The Effects Of Bedding Planes On Hydraulic Fracture Propagation Law In Oil Shale, Li Yanwei, Zhu Chaofan, Zeng Yijian, Shui Haoche, Fan Cunhan, Guo Wei

Coal Geology & Exploration

Hydraulic fracturing serves as a major technical means for the exploitation of oil shale reservoirs presently, and the hydraulic fracture morphology in oil shales is primarily affected by differences in the characteristics of bedding planes. However, current studies mostly focus on the influence of the developmental degree of bedding planes on fracture propagation, overlooking the effects of the bedding plane thickness itself on hydraulic fracture propagation. This study delves into the oil shale in the Xunyi area, Ordos Basin. Based on the theory of linear elastic fracture mechanics, this study developed a stress-damage-seepage model of hydraulic fracture propagation. Using the …

Vertical Variability Of Hydrogeological Characteristics Of Luohe Formation By Double Packer System Pumping Test, Li Chaofeng, Liu Yexian, Zhang Jinkui, Ren Dengjun, Hou Tao, Liu Zengping, Xu Xinqi, Ma Ji, Wang Qingzhen, Duan Xiliang, Xing Jiebo, Li Yang

Coal Geology & Exploration

To investigate the hydrogeological conditions of the thick Luohe Formation in Ordos Basin and quantitatively evaluate vertical variation characteristics of its aquifer’ s water-rich, proposes the method of using the coefficient of transmissibility to evaluate the water-rich of the aquifer, and give the seven level classification standard of water-rich by the method of determining coefficient of transmissibility. The double-packer system was used to carry out the pumping tests of 10 vertical sections of fixed thickness of the Luohe Formation in the DJ1 and DJ2 boreholes in the Gaojiabao mine field, shaanxi, and the hydrogeological parameters were calculated. Using the comprehensive …

Characteristics And Genetic Mechanism Of Low Sulfate In High-Salt Groundwater Of Permian Sandstone In Fudong Mining Area, Huainan, Jiang Chunlu, Huang Wendi, Fu Xianjie, Zheng Liugen, Cheng Shigui, Shan Chonglei

Coal Geology & Exploration

Hydrogeochemistry research of groundwater in coal mining areas is of great significance to the prevention and control of mine water and the comprehensive utilization of water resources. In terms of the low surfate of Permian sandstone water in Fudong mining area, Anhui Huainan Coalfield, the hydrochemical characteristics, water-rock interaction and low sulfate genesis of sandstone water were studied through water sampling and test by multivariate statistical method, in combination with the hydrogeological condition analysis and the sulfur and oxygen isotope technology. The results show that the Permian sandstone water in the study area is weakly alkaline, with an average TDS …

Evaluation Of Water Quality And Identification Of Pollution Factors In Mining Subsidence Area With High Phreatic Water Level, Hu Lin, Chen Yongchun, Xu Yanfei, Li Bing, Wang Jin, An Shikai, Chen Chen, Sun Hongjie, Miao Wei

Coal Geology & Exploration

Huainan mining area is characterized by a high phreatic water level, as well as a wide range and large area of coal mining subsidence areas, with the water quality monitoring data missing and prominent water environment. Therefore, the evaluation of water quality monitoring and identification of pollution factors in large subsidence area is of great significance to regional water environmental governance. Specifically, the water quality of the subsidence area was evaluated with the Nemerow pollution index method by testing the water samples collected from 175 sampling points in the study area. Meanwhile, the eutrophication state of water bodies was evaluated …

A Method For Evaluating Aquiclude Stability In The Water Conservation-Based Mining Of Shallowly Buried Coal Seams In Ecologically Vulnerable Areas In Northwest China, Li Heng, He Tao, Guo Bin

Coal Geology & Exploration

Water conservation and coal mining are both critical to Northwest China. Water conservation-based coal mining is an important technology for the coordinated development of coal and water resources in this region. In this technology, the evaluation of aquiclude stability is critical. Due to the shallow depth of coal seams, intense topographic cutting, and complex changes in near-surface aquifers in the ecologically vulnerable areas in Northwest China, there exist large errors between traditional methods for aquiclude evaluation and the actual hydrological observations in these areas. To address this challenge, this study develops using the 3D geological modelling combined with numerical simulation …

Micp Restoration Law Of Coal Mining Induced Ground Fissures And Its Influencing Factors, Li Tao, Gao Ying, Yan Jingwang, Zhang Jiarui, Kou Guigui, Ma Tengfei, Mei Aoran

Coal Geology & Exploration

The coal mining induced ground fissures in the loess covered area of northwest China cause shallow groundwater resource leakage and soil instability. Therefore, the experimental study was conducted on Microbial Induced Carbonate Precipitation (MICP) restoration of coal mining induced ground fissures in the loess covered area. Specifically, the characteristics of mining induced ground fissures were observed and their development characteristics were revealed based on Ningtiaota Coal Mine in northern Shaanxi. The coal mining induced ground fissures in loess were classified with consideration to the observed mine pressure. Based on the classification and characteristics of coal mining induced ground fractures, the …

Detection Of Small Objects In Open-Pit Coal Mine Stopes Using Uav Remote Sensing Images, Liu Mingrui, Che Ben, Dong Hongbo, Zhu Ruoli

Coal Geology & Exploration

Open-pit coal mine stopes witness frequent vehicle accidents due to their complex terrains. Therefore, accurately positioning vehicles in the stopes is critical to safe coal mining. To overcome the inaccurate positioning of small targets in the mining areas using Unmanned aerial vehicle (UAV) remote sensing images, this study proposed an improved YOLOv7 model for object detection. First, to expedite the reasoning of the YOLOv7 network, the ELAN module in the original YOLOv7 model was improved by introducing partial convolution. Based on this, the eSE channel attention mechanism was combined to form the PConv-eSE convolution attention module. The purpose is to …

Mechanical Properties And Strength Deterioration Mechanism Of Soil In Inner Dump Of Open-Pit Coal Mine Under The Action Of Freeze-Thaw Cycles, Zhang Heyong, Wang Xuedong, Zhu Yongdong, Wang Haipeng, Qi Lihui

Coal Geology & Exploration

In order to investigate the influence mechanism of freeze-thaw cycles on the structure and mechanical properties of soil, the typical clay soil in the inner dump of Yuanbaoshan open-pit coal mine in Inner Mongolia was taken as the research object, and the simulation analysis of the internal temperature, moisture and stress fields of the soil was carried out through laboratory freeze-thaw cycle tests and MatDEM numerical simulation. The results show that: freeze-shrinkage occurs to the soil in the dump after the freeze-thaw cycles, and the stress-strain curve shows the trend of strain softening at low confining pressure for shear failure, …

Intelligent Optimization Method For Tunnel Rotary Drilling Based On Drill String Status Estimation, Yao Ningping, Wei Hongchao, Zhang Jinbao, Lu Chengda, Li Hao, Yao Yafeng, Ke Yougang, Zhang Youzhen

Coal Geology & Exploration

To address the issue in existing research where it is difficult to obtain bottom-hole drilling parameters while drilling, and to overcome the problem of low accuracy and insufficient improvement when optimizing rotary drilling operational parameters using only borehole data, an intelligent optimization method for near-horizontal tunnel rotary drilling based on drill string status is proposed. This involves constructing an in-hole state observer to estimate bottom-hole drilling parameter information. Firstly, the characteristics of rotary drilling in underground coal mine tunnels are analyzed, considering the constraints of actual drilling, and an optimization target evaluation method for mechanical drilling speed and drill bit …

Rate-Of-Penetration (Rop) Prediction Model Based On Formation Characteristics Of Extremely Thick Plastic Mudstone In South China Sea, Zeng Xiaolong, Li Qian, Wei Hongchao, Chen Jiahao, Zhu Haiyan

Coal Geology & Exploration

In terms of petroleum and gas resources, South China Sea is the important energy replacement area in China. However, most of the reservoirs are buried deep, and the strong plasticity of the formation under high confining pressure and the complex geological environment seriously affect the drilling efficiency. It is also very difficult to accurately predict the ROP. Hence, a set of intelligent ROP prediction model was established for the extremely thick mudstone formation with unique viscoelastic and strong plastic characteristics in South China Sea. The model took the actual data of 10 wells in an area of South China Sea …