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Articles 7081 - 7110 of 52513
Full-Text Articles in Entire DC Network
Application And Prospect Of Acoustic Detection In The Mining Sector, Deng Jun, Wang Jinrui, Ren Shuaijing, He Qian, Wang Caiping, Qu Gaoyang
Application And Prospect Of Acoustic Detection In The Mining Sector, Deng Jun, Wang Jinrui, Ren Shuaijing, He Qian, Wang Caiping, Qu Gaoyang
Coal Geology & Exploration
Acoustic detection for mines is a geophysical prospecting technique for mine information detection based on acoustic methods. Compared with other detection methods, acoustic detection has the advantages of wide applicability, high reliability, and low economic investment. This paper reviews the development of acoustic detection technology in the mine field and sorts out and expounds on the research progress and technical characteristics of this technology in detecting basic physical information inside mines and geological information outside mines. Furthermore, this study investigates the detection mechanisms, implementation methods, and applicable scenarios of this technology in determining the object states in the field of …
Study On Modification Of Plant Gum Flushing Fluid In Coal-Bearing Strata And Its Mechanism, Xie Chengchao, Wang Sheng, Yan Peng, Chen Liyi, Li Bingle, Zhang Jie
Study On Modification Of Plant Gum Flushing Fluid In Coal-Bearing Strata And Its Mechanism, Xie Chengchao, Wang Sheng, Yan Peng, Chen Liyi, Li Bingle, Zhang Jie
Coal Geology & Exploration
To improve the adverse effects of the depletion of plant gum resources on the application of flushing fluid in complex strata such as coal-bearing strata, a study was conducted on the compound and crosslinking modification of guar gum. A new type of plant gum flushing fluid (GXB) was developed using xanthan gum as the compound synergist and organic boron as the crosslinking modifier, with cross-linking control agent and inorganic treatment agent as the supplementary. Meanwhile, a series of performance evaluation was carried out. The evaluation results show that GXB has excellent performance and can meet the requirements of drilling in …
Assessing Downstream Aquatic Habitat Availability Relative To Headwater Reservoir Management In The Henrys Fork Snake River, Christina N. Morrisett, Robert W. Van Kirk, Sarah E. Null
Assessing Downstream Aquatic Habitat Availability Relative To Headwater Reservoir Management In The Henrys Fork Snake River, Christina N. Morrisett, Robert W. Van Kirk, Sarah E. Null
Watershed Sciences Student Research
Reservoirs are sometimes managed to meet agricultural and other water demands, while also maintaining streamflow for aquatic species and ecosystems. In the Henrys Fork Snake River, Idaho (USA), irrigation-season management of a headwater reservoir is informed by a flow target in a management reach ~95 km downstream. The target is in place to meet irrigation demand and maintain aquatic habitat within the 11.4 km management reach and has undergone four flow target assignments from 1978 to 2021. Recent changes to irrigation-season management to maximize reservoir carryover warranted investigation into the flow target assignment. Thus, we created a streamflow-habitat model using …
Equilibrium And Kinetic Studies Of Crude Oil Sorption On Unmodified And Modified Napier Grass, Amalachukwu Ifeyinwa Obi, Vincent Ishmael Ajiwe, Chinwe Priscilla Okonkwo
Equilibrium And Kinetic Studies Of Crude Oil Sorption On Unmodified And Modified Napier Grass, Amalachukwu Ifeyinwa Obi, Vincent Ishmael Ajiwe, Chinwe Priscilla Okonkwo
Makara Journal of Science
Nowadays, natural organic adsorbents are widely used to clean up oil from spills owing to their effectiveness, affordability, and biodegradability. In this study, Napier grass, a widely available agricultural material, was used to remove crude oil from aqueous media. The Napier grass was modified via a mild acetylation process to improve its hydrophobicity. The modification increased the Brunauer–Emmett–Teller surface area of the grass from 180.07 to 271.13 m2/g. Fourier-transform infrared analysis revealed that the modification endowed the originally hydrophilic Napier grass with hydrophobicity. The oil sorption processes were based on monolayer physisorption and controlled by film diffusion. The …
Beyond The Ice, Nikolaus T. Butz, Joshua Hunter, Emma Fisher
Beyond The Ice, Nikolaus T. Butz, Joshua Hunter, Emma Fisher
The Journal of Values-Based Leadership
Leadership is a management tool to direct effective achievement of goals. Historical investigation can provide a valuable lens for the study of leadership styles. To that end, this study examines the disparate approaches of Roald Amundsen and Robert Scott as they raced to be the first explorer to reach the South Pole. The objective of this study is to analyze the leadership techniques used in these expeditions, and to determine how they shaped the outcome of each. The process of tacit knowledge and experience coalesce and foster both leadership and action that is not only communication-oriented and value-driven, but also …
Not-So-Super Superfund: Cercla’S Biggest Issues, Cameron Berthiaume
Not-So-Super Superfund: Cercla’S Biggest Issues, Cameron Berthiaume
Scholarly Horizons: University of Minnesota, Morris Undergraduate Journal
The Comprehensive Environmental Response, Compensation and Liability Act (CERCLA/Superfund) is a federal law that allows the Environmental Protection Agency (EPA) to clean up contaminated sites and hold the parties responsible for the contamination financially liable. However, CERCLA faces a number of challenges to fulfilling its mission. This report examines some of the biggest issues facing the law in the past and present.
An Introduction To Consumptive Use Of Water In South Carolina, Heather Bergerud Nix, Mani Rouhi Rad
An Introduction To Consumptive Use Of Water In South Carolina, Heather Bergerud Nix, Mani Rouhi Rad
Journal of South Carolina Water Resources
Effective water resource management requires understanding the supply of and the demand for water. In South Carolina, as in other places, water demand is often determined using total withdrawal volumes. However, the volume of water that is withdrawn can be significantly different from the volume that is actually consumed, which becomes unavailable for downstream uses. Water used for energy generation is commonly excluded from evaluations of total withdrawal volume because it is often assumed to be no or low consumptive use, meaning much of the withdrawn water is returned to the source and remains available for downstream uses. Additionally, energy …
Analysis Of Ostds Failure Potential Due To Sea-Level Rise And Other Inundation Factors: An Integrated Geo-Spatial Analysis, Alec Colarusso
Analysis Of Ostds Failure Potential Due To Sea-Level Rise And Other Inundation Factors: An Integrated Geo-Spatial Analysis, Alec Colarusso
USF Tampa Graduate Theses and Dissertations
While many aspects of climate change are well-studied, the vulnerability of Onsite Sewage Treatment and Disposal Systems (OSTDS) to sea-level rise (SLR) has not been thoroughly examined despite the potentially significant environmental impacts, including nutrient and pathogen loading. Research gaps include the need to determine the suitability of models to predict groundwater inundation due to SLR and the consequent impact on OSTDS. As such, this study aims to compare Bathtub/hydrostatic and physics-based/MODFLOW/3D numerical modeling methods of simulating groundwater inundation from SLR to identify OSTDS vulnerability to failure due to a reduction in the height of the vadose zone (saturation or …
Research On Stability Of Rock Mass And +30 Level Surface Construction Works When Re-Exploiting The Seam H10 At Mong Duong Coal Mine, Vietnam, Tien Trung Vu, Doan Viet Dao
Research On Stability Of Rock Mass And +30 Level Surface Construction Works When Re-Exploiting The Seam H10 At Mong Duong Coal Mine, Vietnam, Tien Trung Vu, Doan Viet Dao
Journal of Sustainable Mining
The re-exploitation of coal seams located near the ground is one of the solutions to increase output, reduce mining investment costs, and avoid wasting coal resources. The re-exploitation of coal seams will also cause instability of the surrounding rock mass and may affect surface construction works. Through the process of re-exploiting the longwall in seam H10 at Mong Duong Coal Mine, the authors have studied and evaluated the stability of the rock mass and +30 level surface works (including fan station and gateroad). To achieve the results in this study, the numerical simulation model method and the analytical method were …
Evaluating The Post-Mining Land Uses Of Former Mine Sites For Sustainable Purposes In South Africa, Sphiwe E Mhlongo
Evaluating The Post-Mining Land Uses Of Former Mine Sites For Sustainable Purposes In South Africa, Sphiwe E Mhlongo
Journal of Sustainable Mining
This paper uses a case study of an abandoned magnesite mine in the Limpopo Province of South Africa to find ways of identifying post-mining land used from the current uses of the abandoned mine sites or features. The approach used involved carrying out a field characterization of the mine site and documentation of the current uses of the features of the abandoned mine site. The technique used to identify the internal and external factors of the land uses involved analyzing their Strength, Weakness, Opportunities, and Threats. The Analytic Hierarchy Process (AHP) technique was used for further ranking of the land …
Comments For The Draft Residential Metals Abatement Program – Interior School Dust – Investigation Summary Report – Hillcrest Elementary (April 12, 2023), Nikia Greene
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Comments For The Draft Residential Metals Abatement Program – Interior School Dust – Investigation Summary Report – Ramsay Elementary_Rev1 (April 26, 2023), Nikia Greene
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Comments For The Draft Residential Metals Abatement Program – Interior School Dust – Investigation Summary Report – Butte Central High School (April 12, 2023), Nikia Greene
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Comments For The Draft Residential Metals Abatement Program – Interior School Dust – Investigation Summary Report – Former Hawthorne School (April 12, 2023), Nikia Greene
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Draft Final 2023 Residential Metals Abatement Program (Rmap) Park Soil Sampling Field Sampling Plan (Fsp) Submittal #9 [Centerville Skating Rink, Belmont Senior Citizens Center, High Altitude Skating Rink, Missoula Gulch Ballfield Play Area, Mac Facilities, Butte Family Ymca, Church Of Christ, And Montana Tech South Campus], Pioneer Technical Services, Inc.
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Comments For The Draft Residential Metals Abatement Program – Interior School Dust – Investigation Summary Report – Butte High School (April 12, 2023), Nikia Greene
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Comments For The Draft Residential Metals Abatement Program – Interior School Dust – Investigation Summary Report – Ramsay Elementary_Rev1 (April 26, 2023), Nikia Greene
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Comments For The Draft Residential Metals Abatement Program – Interior School Dust – Investigation Summary Report – Hillcrest Elementary (April 12, 2023), Nikia Greene
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Comments For The Draft Residential Metals Abatement Program – Interior School Dust – Investigation Summary Report – Margaret Leary Elementary (April 12, 2023), Nikia Greene
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Final 2023 Residential Metals Abatement Program (Rmap) Quality Assurance Project Plan (Qapp) Annual Update (Non-Residential Parcels), Pioneer Technical Services, Inc.
Final 2023 Residential Metals Abatement Program (Rmap) Quality Assurance Project Plan (Qapp) Annual Update (Non-Residential Parcels), Pioneer Technical Services, Inc.
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Comments For The Draft Residential Metals Abatement Program – Interior School Dust – Investigation Summary Report – Butte Central Elementary And Middle School (April 12, 2023), Nikia Greene
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Comments For The Draft Residential Metals Abatement Program – Interior School Dust – Investigation Summary Report – Butte Central High School (April 12, 2023), Nikia Greene
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Comments For The Draft Residential Metals Abatement Program – Interior School Dust – Investigation Summary Report – Former Hawthorne School (April 12, 2023), Nikia Greene
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Comments For The Draft Residential Metals Abatement Program – Interior School Dust – Investigation Summary Report – Whittier Elementary (April 13, 2023), Nikia Greene
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Comments For The Draft Residential Metals Abatement Program – Interior School Dust – Investigation Summary Report – Monroe Head Start (April 12, 2023), Nikia Greene
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Comments For The Draft Residential Metals Abatement Program – Interior School Dust – Investigation Summary Report – Butte High School (April 12, 2023), Nikia Greene
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Comments For The Draft Residential Metals Abatement Program – Interior School Dust – Investigation Summary Report – Butte Central Elementary And Middle School (April 12, 2023), Nikia Greene
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Comments For The Draft Residential Metals Abatement Program – Interior School Dust – Investigation Summary Report – Monroe Head Start (April 12, 2023), Nikia Greene
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Comments For The Draft Residential Metals Abatement Program – Interior School Dust – Investigation Summary Report – Margaret Leary Elementary (April 12, 2023), Nikia Greene
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Comments For The Draft Residential Metals Abatement Program – Interior School Dust – Investigation Summary Report – Whittier Elementary (April 13, 2023), Nikia Greene
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.