scholarly journals Application of Resistivity Method for Mining Tailings Site Selection in Karst Regions

2020 ◽  
Vol 144 ◽  
pp. 01002 ◽  
Author(s):  
Mosaad Ali ◽  
Shulin Sun ◽  
Wei Qian ◽  
Abdou Dodo Bohari ◽  
Dusabemariya Claire ◽  
...  
Keyword(s):  
Groundwater Exploration ◽  
Disposal Site ◽  
Location Selection ◽  
Tailings Pond ◽  
Mining Tailings ◽  
Resistivity Method ◽  
Surface Data ◽  
Data Survey ◽  
Selection For ◽  
Insight Into

Disposal of mining wastes (tailings) is one of the most severe issues related to groundwater contamination. Therefore, a properly selected disposal site helps to prevent the leakage of dissolved materials in the tailings to groundwater, especially in the karstic area. Where the karstic environment is one of the challenges facing groundwater environmental and engineering issues, for instance, groundwater exploration, vulnerability assessment, and hazard estimation. In this study, the resistivity method with a high-resolution surface data survey was carried out to investigate the pond location selection for mining tailings disposal at El Mochito mine site, northwest Honduras. The results of the two-dimensional (2-D) inversion for sixteen surveyed lines revealed that many low resistivity zones. These zones are related to water/clay-bearing zones that are structurally weak. From lines 8-12, the limestone underneath the surface is the most compact, and this is the best location in the survey area for tailings pond construction. The resistivity method has provided insight into the subsurface information and locating hydraulically conductive zones, so it can be useful for selecting the site of mining tailings.

Communities ready for takeoff

2017 ◽  
Vol 36 (1) ◽  
pp. 14-26 ◽  
Author(s):  
Sanne A. M. Rijkhoff ◽  
Season A. Hoard ◽  
Michael J. Gaffney ◽  
Paul M. Smith
Keyword(s):  
Site Selection ◽  
Science Literature ◽  
Location Selection ◽  
Community Assets ◽  
Selection Decisions ◽  
The Social ◽  
Selection For ◽  
Insight Into ◽  
New Infrastructure ◽  
Take All

Although much of the social science literature supports the importance of community assets for success in many policy areas, these assets are often overlooked when selecting communities for new infrastructure facilities. Extensive collaboration is crucial for the success of environmental and economic projects, yet it often is not adequately addressed when making siting decisions for new projects. This article develops a social asset framework that includes social, creative, and human capital to inform site-selection decisions. This framework is applied to the Northwest Advanced Renewables Alliance project to assess community suitability for biofuel-related developments. This framework is the first to take all necessary community assets into account, providing insight into successful site selection beyond current models. The framework not only serves as a model for future biorefinery projects but also guides tasks that depend on informed location selection for success.

Death and Disposal Locations of Serial Homicides: The Effect on Recovery Timeframes

2021 ◽  
pp. 108876792110068
Author(s):  
Brendan Chapman ◽  
Cody Raymer ◽  
David A. Keatley
Keyword(s):  
Time Series ◽  
Exploratory Study ◽  
Serial Killers ◽  
Disposal Site ◽  
Time Since Death ◽  
Forensic Evidence ◽  
Hostile Environments ◽  
Case Data ◽  
Insight Into ◽  
Homicide Case

Many factors affect the solvability of homicides, including body disposal location and time between death and recovery. The aim of this exploratory study was to probe a number of spatiotemporal variables for trends across a subset of solved homicide case data from 54 North American serial killers, active between 1920 and 2016 (125 solved cases) to identify areas for further research. We investigated murder site and body disposal site as location variables with eight subcategories across eight discrete time series, seeking insight into how these factors may affect the early stages of an investigation and (therefore by inference) solvability. The findings showed that bodies recovered after 48 hours are more likely discovered outdoor while those discovered within 24 hours, within the victim’s residence. This has implications for the ability to recover forensic evidence when bodes are located after a prolonged time since death as well as in more hostile environments.

scholarly journals Solvent selection for fatty acid residue analysis of archeologicial artifacts

2017 ◽  
Vol 3 (1) ◽  
pp. 1-10
Author(s):  
Jeffrey J. Rosentreter ◽  
John Malamakal ◽  
Kelli Barnes ◽  
Matt Alexander
Keyword(s):  
Fatty Acids ◽  
Extraction Efficiency ◽  
Lipid Analysis ◽  
Residue Analysis ◽  
Chemical Properties ◽  
Fatty Acid Residue ◽  
Quantitative Extraction ◽  
Selection For ◽  
Carbonized Wood ◽  
Insight Into

AbstractResidue analysis has rapidly become one of the most useful techniques for determining an artifact function and revealing insight into paleodiets. The success of analytical residue analysis often lies with the first preparatory step, where the residue is extracted from the object. Detection of a residue requires effective solvation of the material, and there is a large range of potential solvents. One purpose of this study is to determine the efficiency of various solvents for the extraction of fatty acids from charcoal, a material that is ubiquitous, easily identified, remarkably stable in the archaeological record but, most importantly for this research, retains fats extremely well. This investigation examines the removal efficiency of model fatty acids from carbonized wood samples. The strong affinity of lipids to charcoal makes carbonized wood ideal for retaining them, but also makes their extraction extremely challenging and thus an ideal benchmark for solvent extraction characterization. Several solvents (benzene, chloroform, hexane, methanol and water) are used to determine the quantitative extraction efficiency of tripalmitin. While benzene and chloroform perform best for some wood types, neither solvent is better for all carbonized wood. Correlations between the chemical properties of the solvents and the effectiveness of the extraction provide guidance for solvents. Findings indicate solvent characteristics including dipole moment, dielectric constant, hydrogen bonding, and molecular weight all play an important role in extraction of fat from a charcoal matrix. Results presented should provide guidelines to allow for more effective residue extration and more accurate lipid analysis.

scholarly journals Microhomology Selection for Microhomology Mediated End Joining in Saccharomyces cerevisiae

Genes ◽  
2019 ◽  
Vol 10 (4) ◽  
pp. 284 ◽  
Author(s):  
Kihoon Lee ◽  
Jae-Hoon Ji ◽  
Kihoon Yoon ◽  
Jun Che ◽  
Ja-Hwan Seol ◽  
...  
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Budding Yeast ◽  
Product Formation ◽  
Dna Breaks ◽  
End Joining ◽  
Base Pairs ◽  
Circular Chromosome ◽  
Proximal Side ◽  
Selection For ◽  
Insight Into

Microhomology-mediated end joining (MMEJ) anneals short, imperfect microhomologies flanking DNA breaks, producing repair products with deletions in a Ku- and RAD52-independent fashion. Puzzlingly, MMEJ preferentially selects certain microhomologies over others, even when multiple microhomologies are available. To define rules and parameters for microhomology selection, we altered the length, the position, and the level of mismatches to the microhomologies flanking homothallic switching (HO) endonuclease-induced breaks and assessed their effect on MMEJ frequency and the types of repair product formation. We found that microhomology of eight to 20 base pairs carrying no more than 20% mismatches efficiently induced MMEJ. Deletion of MSH6 did not impact MMEJ frequency. MMEJ preferentially chose a microhomology pair that was more proximal from the break. Interestingly, MMEJ events preferentially retained the centromere proximal side of the HO break, while the sequences proximal to the telomere were frequently deleted. The asymmetry in the deletional profile among MMEJ products was reduced when HO was induced on the circular chromosome. The results provide insight into how cells search and select microhomologies for MMEJ in budding yeast.

Warehouse Vis: A Visual Analytics Approach to Facilitating Warehouse Location Selection for Business Districts

2020 ◽  
Vol 39 (3) ◽  
pp. 483-495
Author(s):  
Q. Li ◽  
Q. Q. Liu ◽  
C. F. Tang ◽  
Z. W. Li ◽  
S. C. Wei ◽  
...  
Keyword(s):  
Visual Analytics ◽  
Location Selection ◽  
Warehouse Location ◽  
Selection For

scholarly journals Interconnections for Additively Manufactured Hybridized Printed Electronics in Harsh Environments

Designs ◽  
2020 ◽  
Vol 4 (2) ◽  
pp. 14 ◽  
Author(s):  
Clayton Neff ◽  
Edwin Elston ◽  
Amanda Schrand
Keyword(s):  
Printed Electronics ◽  
Material Selection ◽  
Harsh Environments ◽  
Circuit Boards ◽  
High Acceleration ◽  
Selection For ◽  
Select Material ◽  
Pull Testing ◽  
Planar Circuit ◽  
Insight Into

The ability to fabricate functional 3D conductive elements via additive manufacturing has opened up a unique sector of ‘hybridized printed electronics’. In doing so, many of the rigid standards (i.e., planar circuit boards, potting, etc.,) of traditional electronics are abandoned. However, one critical challenge lies in producing robust and reliable interconnections between conductive inks and traditional hardware, especially when subjected to harsh environments. This research examines select material pairings for the most resilient interconnection. The method of test is wire bond pull testing that would represent a continuous strain on a connection and high acceleration testing of up to 50,000 g that would represent a sudden shock that electronics may experience in a drop or crash. Although these two environments may be similar to an overall energy exerted on the connection, the rate of force exerted may lead to different solutions. The results of this research provide insight into material selection for printed electronic interconnections and a framework for interconnection resiliency assessment, which is a critical aspect in realizing the production of next generation electronics technologies for the most demanding environments.

scholarly journals A Two-Step Immunomagnetic Microbead-Based Method for the Isolation of Human Primary Skin Telocytes/CD34+ Stromal Cells

2020 ◽  
Vol 21 (16) ◽  
pp. 5877 ◽  
Author(s):  
Eloisa Romano ◽  
Irene Rosa ◽  
Bianca Saveria Fioretto ◽  
Elena Lucattelli ◽  
Marco Innocenti ◽  
...  
Keyword(s):  
Stromal Cells ◽  
Functional Data ◽  
Cell Separation ◽  
Negative Selection ◽  
Immune Surveillance ◽  
In Vitro Study ◽  
Homeostasis Regulation ◽  
Selection For ◽  
Insight Into

Telocytes (TCs), commonly referred to as TCs/CD34+ stromal cells, are a peculiar type of interstitial cells with distinctive morphologic traits that are supposed to exert several biological functions, including tissue homeostasis regulation, cell-to-cell signaling, immune surveillance, and reparative/regenerative effects. At present, the majority of studies investigating these cells are mainly descriptive and focus only on their morphology, with a consequent paucity of functional data. To gain relevant insight into the possible functions of TCs, in vitro analyses are clearly required, but currently, the protocols for TC isolation are only at the early stages and not fully standardized. In the present in vitro study, we describe a novel methodology for the purification of human primary skin TCs through a two-step immunomagnetic microbead-based cell separation (i.e., negative selection for CD31 followed by positive selection for CD34) capable of discriminating these cells from other connective tissue-resident cells on the basis of their different immunophenotypic features. Our experiments clearly demonstrated that the proposed method allows a selective purification of cells exhibiting the peculiar TC morphology. Isolated TCs displayed very long cytoplasmic extensions with a moniliform silhouette (telopodes) and presented an immunophenotypic profile (CD31−/CD34+/PDGFRα+/vimentin+) that unequivocally differentiates them from endothelial cells (CD31+/CD34+/PDGFRα−/vimentin+) and fibroblasts (CD31−/CD34−/PDGFRα+/vimentin+). This novel methodology for the isolation of TCs lays the groundwork for further research aimed at elucidating their functional properties and possible translational applications, especially in the field of regenerative medicine.

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