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Articles 721 - 750 of 5885
Full-Text Articles in Entire DC Network
Assessing Clinical Change In Individuals Exposed To Repetitive Head Impacts: The Repetitive Head Impact Composite Index, Charles Bernick, Guogen Shan, Lauren Bennett, Jay Alberts, Jeffrey Cummings
Assessing Clinical Change In Individuals Exposed To Repetitive Head Impacts: The Repetitive Head Impact Composite Index, Charles Bernick, Guogen Shan, Lauren Bennett, Jay Alberts, Jeffrey Cummings
School of Public Health Faculty Research
Background: There is a current lack of any composite measure for the effective tracking and monitoring of clinical change in individuals exposed to repetitive head impacts (RHI). The aim of this study is to create a composite instrument for the purposes of detecting change over time in cognitive and behavioral function in individuals exposed to RHI. Methods: The data to derive the composite instrument came from the Professional Fighters Brain Health Study (PFBHS), a longitudinal study of active and retired professional fighters [boxers and mixed martial arts (MMA) fighters] and healthy controls. Participants in the PFBHS underwent assessment on an …
Traveling Wave Solutions For Two Species Competitive Chemotaxis Systems, T. B. Issa, Richadi B. Salako, W. Shen
Traveling Wave Solutions For Two Species Competitive Chemotaxis Systems, T. B. Issa, Richadi B. Salako, W. Shen
Mathematical Sciences Faculty Research
In this paper, we consider two species chemotaxis systems with Lotka–Volterra competition reaction terms. Under appropriate conditions on the parameters in such a system, we establish the existence of traveling wave solutions of the system connecting two spatially homogeneous equilibrium solutions with wave speed greater than some critical number c∗. We also show the non-existence of such traveling waves with speed less than some critical number c0∗, which is independent of the chemotaxis. Moreover, under suitable hypotheses on the coefficients of the reaction terms, we obtain explicit range for the chemotaxis sensitivity coefficients ensuring c∗=c0∗, which implies that the minimum …
Exploring Sources Of Engineering Teaching Self-Efficacy For Pre-Service Elementary Teachers, Ezgi Yesilyurt, Hasan Deniz, Erdogan Kaya
Exploring Sources Of Engineering Teaching Self-Efficacy For Pre-Service Elementary Teachers, Ezgi Yesilyurt, Hasan Deniz, Erdogan Kaya
Teaching and Learning Faculty Research
Background: The Next Generation Science Standards (2013) put a special emphasis on engineering for K-12 science education. However, a significant number of elementary teachers still feel unprepared to integrate engineering into their science programs. It is, therefore, incumbent upon science educators to update their elementary science methods courses to accommodate engineering especially in the states which adopted the NGSS. In this study, we taught an engineering unit in an elementary science teaching methods course to examine what instructional components and learning experiences provided in the engineering unit enhance teachers’ engineering teaching self-efficacy beliefs. Our research questions addressed to what extent …
From Here To There To Who Knows Where: The Continuing Evolution Of Solution-Focused Brief Therapy, Larry Hopwood
From Here To There To Who Knows Where: The Continuing Evolution Of Solution-Focused Brief Therapy, Larry Hopwood
Journal of Solution Focused Practices
No abstract provided.
Barriers To And Uncertainties In Understanding And Quantifying Global Critical Mineral And Element Supply, Brian A. Mcnulty, Simon M. Jowitt
Barriers To And Uncertainties In Understanding And Quantifying Global Critical Mineral And Element Supply, Brian A. Mcnulty, Simon M. Jowitt
Geoscience Faculty Research
The critical minerals and elements are natural substances that are essential to modern life but have insecure supply. This lack of a secure supply clashes with the increasing importance of these elements, especially given their use in technologies needed to reduce global CO2 emissions and mitigate against anthropogenic climate change. In this contribution we review the by-product nature of the critical minerals and elements and the inherant uncertainties in reported critical mineral and element annual production as well as the relationships between these commodities and main-product metals and associated concentrates. We explore the geological and geographical barriers to critical mineral …
Differing Fine-Scale Responses Of Vegetation And Bare Soil To Moisture Variation In A Pinyon-Juniper Woodland Underlie Landscape-Scale Responses Observed From Remote Sensing, D. A. Devitt, B. Bird, L. Fenstermaker, M. D. Petrie
Differing Fine-Scale Responses Of Vegetation And Bare Soil To Moisture Variation In A Pinyon-Juniper Woodland Underlie Landscape-Scale Responses Observed From Remote Sensing, D. A. Devitt, B. Bird, L. Fenstermaker, M. D. Petrie
Life Sciences Faculty Research
Pinyon juniper woodlands in the American southwest face an uncertain ecological future with regard to climate altered precipitation. Although satellite remote sensing will be relied upon to assess the overall health of these plant communities more fine scaled information is needed to elucidate the mechanisms shaping the broader scaled regional assessments. We conducted a study to assess the NDVI response at the plant canopy level (insitu sensors placed over the canopies) of three tree and one shrub species to changes in precipitation, reference evapotranspiration and soil volumetric water content. Landsat data was used to compare stand integrated and satellite NDVI …
A Survey On Securing Iot Ecosystems And Adaptive Network Vision, Tejaswini Goli, Yoohwan Kim
A Survey On Securing Iot Ecosystems And Adaptive Network Vision, Tejaswini Goli, Yoohwan Kim
Computer Science Faculty Research
The rapid growth of Internet-of-Things (IoT) devices and the large network of interconnected devices pose new security challenges and privacy threats that would put those devices at high risk and cause harm to the affiliated users. This paper emphasizes such potential security challenges and proposes possible solutions in the field of IoT Security, mostly focusing on automated or adaptive networks. Considering the fact that IoT became widely adopted, the intricacies in the security field tend to grow expeditiously. Therefore, it is necessary for businesses to adopt new security protocols and to the notion of automated network security practices driven by …
The Effect Of Ankle Taping On The Kinematics Of The Lower Extremity While Running On Level, Inclined, And Declined Slopes, Dominique Cava, Derek M. R. Kivi, Paolo Sanzo, Carlos Zerpa
The Effect Of Ankle Taping On The Kinematics Of The Lower Extremity While Running On Level, Inclined, And Declined Slopes, Dominique Cava, Derek M. R. Kivi, Paolo Sanzo, Carlos Zerpa
Topics in Exercise Science and Kinesiology
Topics in Exercise Science and Kinesiology Volume 2: Issue 1, Article 8, 2021. Therapeutic taping is often prescribed as a treatment for various overuse injuries in the lower extremity. Researchers believe that taping may control the position and alter alignment of the calcaneus to correct foot pathologies when applied to the ankle in runners, however, the utility and specific mechanical effects of different taping techniques remains unclear. The purpose of this study was to explore the effect of ankle taping (no tape (NT), Kinesiotape® (KT), or Leukotape® (LT)) across different slope conditions (level, inclined, and declined) on the kinematics of …
Recovery Of High Specific Activity Molybdenum-99 From Accelerator-Induced Fission On Low-Enriched Uranium For Technetium-99m Generators, M. Alex Brown, Nathan Johnson, Artem V. Gelis, Milan Stika, Anna G. Servis, Alex Bakken, Christine Krizmanich, Kristin Shannon, Peter Kozak, Amanda Barnhart, Chad Denbrock, Nicolas Luciani, Terry Grimm, Peter Tkac
Recovery Of High Specific Activity Molybdenum-99 From Accelerator-Induced Fission On Low-Enriched Uranium For Technetium-99m Generators, M. Alex Brown, Nathan Johnson, Artem V. Gelis, Milan Stika, Anna G. Servis, Alex Bakken, Christine Krizmanich, Kristin Shannon, Peter Kozak, Amanda Barnhart, Chad Denbrock, Nicolas Luciani, Terry Grimm, Peter Tkac
Chemistry and Biochemistry Faculty Research
A new process was developed to recover high specific activity (no carrier added) 99Mo from electron-accelerator irradiated U3O8 or uranyl sulfate targets. The process leverages a novel solvent extraction scheme to recover Mo using di(2-ethylhexyl) phosphoric acid following uranium and transuranics removal with tri-n-butyl phosphate. An anion-exchange concentration column step provides a final purification, generating pure 99Mo intended for making 99Mo/99mTc generators. The process was demonstrated with irradiated uranium targets resulting in more than 95% 99Mo recovery and without presence of fission products or actinides in the product.
Special Issue Editorial: Current Advances In Liquid Crystals, Pradip K. Bhowmik
Special Issue Editorial: Current Advances In Liquid Crystals, Pradip K. Bhowmik
Chemistry and Biochemistry Faculty Research
No abstract provided.
Calcium Isotope Cosmochemistry, Maria C. Valdes, Katherine R. Bermingham, Shichun Huang, Justin I. Simon
Calcium Isotope Cosmochemistry, Maria C. Valdes, Katherine R. Bermingham, Shichun Huang, Justin I. Simon
Geoscience Faculty Research
The past decade has seen significant advancements in analytical capabilities and with it a marked increase in the use of Ca isotopes to advance our understanding of the Solar System's and Earth's evolution. Here, mass-dependent and non-mass-dependent Ca isotopic variations in bulk meteorites and chondrite components are discussed. This contribution also examines how Ca isotopes record nebular processes, including evaporation/condensation and mixing of chemically and isotopically distinct reservoirs in the protoplanetary disk. The applicability of non-mass-dependent Ca isotopic variations to tracing the nature and timing of stellar mass contributions to the parental molecular cloud is discussed. This includes the constraints …
Using Growth Mindset Strategies In The Classroom, Amani Altaleb
Using Growth Mindset Strategies In The Classroom, Amani Altaleb
Taboo: The Journal of Culture and Education
No abstract provided.
Community, Fahad Alshammari
Community, Fahad Alshammari
Taboo: The Journal of Culture and Education
No abstract provided.
Genius Hour Strategy, Mathawi Alqahtani
Genius Hour Strategy, Mathawi Alqahtani
Taboo: The Journal of Culture and Education
No abstract provided.
Critical Praxis Círculos: The Impact Of Culturally Responsive Teacher Development, Raúl S. Lomelí
Critical Praxis Círculos: The Impact Of Culturally Responsive Teacher Development, Raúl S. Lomelí
Taboo: The Journal of Culture and Education
No abstract provided.
Β -Technetium: An Allotrope With A Nonstandard Volume-Pressure Relationship, Emily Siska, Dean Smith, Christian Childs, Daniel Koury, Paul M. Forster, Keith V. Lawler, Ashkan Salamat
Β -Technetium: An Allotrope With A Nonstandard Volume-Pressure Relationship, Emily Siska, Dean Smith, Christian Childs, Daniel Koury, Paul M. Forster, Keith V. Lawler, Ashkan Salamat
Chemistry and Biochemistry Faculty Research
We report the synthesis and structure of the second allotrope of technetium, β-Tc. Transformative pathways are accessed at extreme conditions using the laser-heated diamond anvil cell and confirmed with in situ synchrotron x-ray diffraction and Raman spectroscopy. β-Tc is fully recoverable to ambient conditions, although counter to our DFT calculations predicting a face-centered-cubic lattice, we observe a tetragonal structure (I4/mmm) that exhibits further tetragonal distortion with pressure. β-Tc has an expanded volume relative to the hcp ground state phase, that when doped with nitrogen has an unexpected volume lowering. Such anomalous behavior is possibly indicative of a rare electronic phase …
Postsecondary Educational Attainment And Health Among Younger U.S. Adults In The “College-For-All” Era, Anna Zajacova, Elizabeth Lawrence
Postsecondary Educational Attainment And Health Among Younger U.S. Adults In The “College-For-All” Era, Anna Zajacova, Elizabeth Lawrence
Sociology Faculty Research
Population-health research has neglected differentiation within postsecondary educational attainments. This gap is critical to understanding health inequality because college experience with no degree, vocational/technical certificates, and associate degrees may affect health differently. We examine health across detailed postsecondary attainment levels. We analyze data on 14,750 respondents in Waves I and IV of the nationally representative Add Health panel spanning adolescence to ages 26 to 34. Multivariate regression and counterfactual approaches to minimize the impact of confounders estimate multiple health outcomes across postsecondary attainment levels. Compared to high school diplomas, we find significant returns to bachelor’s degrees for most health outcomes …
Propensity Score Analysis Assessing The Burden Of Non-Communicable Diseases Among The Transgender Population In The United States Using The Behavioral Risk Factor Surveillance System (2017–2019), Jennifer R. Pharr, Kavita Batra
Propensity Score Analysis Assessing The Burden Of Non-Communicable Diseases Among The Transgender Population In The United States Using The Behavioral Risk Factor Surveillance System (2017–2019), Jennifer R. Pharr, Kavita Batra
Environmental & Global Health Faculty Research
Research to assess the burden of non-communicable diseases (NCDs) among the transgender population needs to be prioritized given the high prevalence of chronic conditions and associated risk factors in this group. Previous cross-sectional studies utilized unmatched samples with a significant covariate imbalance resulting in a selection bias. Therefore, this cross-sectional study attempts to assess and compare the burden of NCDs among propensity score-matched transgender and cisgender population groups. This study analyzed Behavioral Risk Factor Surveillance System data (2017–2019) using complex weighting procedures to generate nationally representative samples. Logistic regression was fit to estimate propensity scores. Transgender and cisgender groups were …
Impact Of Neoantigen Expression And T-Cell Activation On Breast Cancer Survival, Wenjing Li, Amei Amei, Francis Bui, Saba Norouzifar, Lingeng Lu, Zuoheng Wang
Impact Of Neoantigen Expression And T-Cell Activation On Breast Cancer Survival, Wenjing Li, Amei Amei, Francis Bui, Saba Norouzifar, Lingeng Lu, Zuoheng Wang
Mathematical Sciences Faculty Research
Neoantigens are derived from tumor-specific somatic mutations. Neoantigen-based syn-thesized peptides have been under clinical investigation to boost cancer immunotherapy efficacy. The promising results prompt us to further elucidate the effect of neoantigen expression on patient survival in breast cancer. We applied Kaplan–Meier survival and multivariable Cox regression models to evaluate the effect of neoantigen expression and its interaction with T-cell activation on overall survival in a cohort of 729 breast cancer patients. Pearson’s chi-squared tests were used to assess the relationships between neoantigen expression and clinical pathological variables. Spearman correlation analysis was conducted to identify correlations between neoantigen expression, mutation …
How State Interventions Affect Municipalities Taking The Lead In Sustainability, Jayce L. Farmer, Andres J.Rodriguez Lombeida
How State Interventions Affect Municipalities Taking The Lead In Sustainability, Jayce L. Farmer, Andres J.Rodriguez Lombeida
Public Policy and Leadership Faculty Research
The state and local governments throughout the United States interact within a complex system of multilevel governance to advance sustainability. However, we know little about what this hierarchical system of exchanges means for municipalities as they work to achieve energy efficient government operations. Drawing on a perspective of “contested federalism”, we examine how the transaction costs of state–local government relations affect the efforts of U.S. cities to lead by example and promote sustainability within their internal processes. We apply a Bayesian item response theory approach to assess the effects of state-level fiscal and policy interventions on municipal commitments to energy …
Bountychain: Toward Decentralizing A Bug Bounty Program With Blockchain And Ipfs, Alex Hoffman, Phillipe Austria, Chol Hyun Park, Yoohwan Kim
Bountychain: Toward Decentralizing A Bug Bounty Program With Blockchain And Ipfs, Alex Hoffman, Phillipe Austria, Chol Hyun Park, Yoohwan Kim
Computer Science Faculty Research
Bug Bounty Programs (BBPs) play an important role in providing and maintaining security in software applications. These programs allow testers to discover and resolve bugs before the general public is aware of them, preventing incidents of widespread abuse. However, they have shown problems such as organizations providing accountability of reporting bugs and nonrecognition of testers. In this paper, we discuss Bountychain, a decentralized application using Ethereum-based Smart Contracts (SCs) and the Interplanetary File System (IPFS), a distributed file storage system. Blockchain and SCs provide a safe, secure and transparent platform for a BBP. Testers can submit bug reports and organizations …
Colossal Density-Driven Resistance Response In The Negative Charge Transfer Insulator Mns2, Dylan Durkee, Nathan Dasenbrock-Gammon, G. Alexander Smith, Elliot Snider, Dean Smith, Christian Childs, Simon A.J. Kimber, Keith V. Lawler, Ranga P. Dias, Ashkan Salamat
Colossal Density-Driven Resistance Response In The Negative Charge Transfer Insulator Mns2, Dylan Durkee, Nathan Dasenbrock-Gammon, G. Alexander Smith, Elliot Snider, Dean Smith, Christian Childs, Simon A.J. Kimber, Keith V. Lawler, Ranga P. Dias, Ashkan Salamat
Chemistry and Biochemistry Faculty Research
A reversible density driven insulator to metal to insulator transition in high-spin MnS2 is experimentally observed, leading with a colossal electrical resistance drop of 108 ω by 12 GPa. Density functional theory simulations reveal the metallization to be unexpectedly driven by previously unoccupied S22- σ3p∗ antibonding states crossing the Fermi level. This is a unique variant of the charge transfer insulator to metal transition for negative charge transfer insulators having anions with an unsaturated valence. By 36 GPa the emergence of the low-spin insulating arsenopyrite (P21/c) is confirmed, and the bulk metallicity is broken with the system returning to an …
The Pitfalls, Perils, And Promise Of Hydrophilanthropy, David K. Kreamer
The Pitfalls, Perils, And Promise Of Hydrophilanthropy, David K. Kreamer
Geoscience Faculty Research
No abstract provided.
Pasokification: Fall Of The European Center Left Or A Transformation Of The System, Jacob S. Cox
Pasokification: Fall Of The European Center Left Or A Transformation Of The System, Jacob S. Cox
Governance: The Political Science Journal at UNLV
The party systems of Europe since 1945 have been defined by the division between one large center-left and one large center-right party with usually smaller parties of the center, left, or right. However, in the 21st century and especially since 2010, the center-left has seen its support plunge across Europe with a few notable exceptions. The Socialist Party of France in 2017 held the presidency and controlled the National Assembly. Nevertheless, not even three years later, the party is on the verge of extinction and beset by numerous splits. The Social Democratic Party of Germany has seen its support …
Topology Identification In Distribution System Via Machine Learning Algorithms, Peyman Razmi, Mahdi Ghaemi Asl, Giorgio Canarella, Afsaneh Sadat Emami
Topology Identification In Distribution System Via Machine Learning Algorithms, Peyman Razmi, Mahdi Ghaemi Asl, Giorgio Canarella, Afsaneh Sadat Emami
Molasky Family Department of Economics and Real Estate Faculty Research
This paper contributes to the literature on topology identification (TI) in distribution networks and, in particular, on change detection in switching devices' status. The lack of measurements in distribution networks compared to transmission networks is a notable challenge. In this paper, we propose an approach to topology identification (TI) of distribution systems based on supervised machine learning (SML) algorithms. This methodology is capable of analyzing the feeder's voltage profile without requiring the utilization of sensors or any other extraneous measurement device. We show that machine learning algorithms can track the voltage profile's behavior in each feeder, detect the status of …
Coupled Deep-Mantle Carbon-Water Cycle: Evidence From Lower-Mantle Diamonds, Wenzhong Wang, Oliver Tschauner, Shichun Huang, Zhongqing Wu, Yufei Meng, Hans Bechtel, Ho Kwang Mao
Coupled Deep-Mantle Carbon-Water Cycle: Evidence From Lower-Mantle Diamonds, Wenzhong Wang, Oliver Tschauner, Shichun Huang, Zhongqing Wu, Yufei Meng, Hans Bechtel, Ho Kwang Mao
Geoscience Faculty Research
Diamonds form in a variety of environments between subducted crust, lithospheric and deep mantle. Recently, deep source diamonds with inclusions of the high-pressure H O-phase ice-VII were discovered. By correlating the pressures of ice-VII inclusions with those of other high-pressure inclusions, we assess quantitatively the pressures and temperatures of their entrapment. We show that the ice-VII-bearing diamonds formed at depths down to 800 ± 60 km but at temperatures 200–500 K below average mantle temperature that match the pressure-temperature conditions of decomposing dense hydrous mantle silicates. Our work presents strong evidence for coupled recycling of water and carbon in the …
Control-Oriented Nonlinear Modeling Of Polyvinyl Chloride (Pvc) Gel Actuators, Mohammed Al-Rubaiai, Xinda Qi, Zachary Frank, Ryohei Tsuruta, Umesh Gandhi, Kwang J. Kim, Xiaobo Tan
Control-Oriented Nonlinear Modeling Of Polyvinyl Chloride (Pvc) Gel Actuators, Mohammed Al-Rubaiai, Xinda Qi, Zachary Frank, Ryohei Tsuruta, Umesh Gandhi, Kwang J. Kim, Xiaobo Tan
Mechanical Engineering Faculty Research
Polyvinyl chloride (PVC) gel-based actuators are a new class of soft, electroactive polymer actuators with several attractive properties, including low cost, large compliance, large strain output, high-stress output, fast response, and stability against thermal influence. While PVC gel actuators are quickly gaining attention, they remain largely unexplored despite their great potential in a long list of applications compared with many other smart material actuators. In particular, little work has been reported on modeling nonlinear dynamics of PVC actuators. In this work a nonlinear, control-oriented Hammerstein model, with a polynomial nonlinearity preceding a transfer function, is proposed to capture the amplitude-dependent …
Revitalization: Crime Prevention Through Design Intervention, Jose Ricardo Leon Serrano
Revitalization: Crime Prevention Through Design Intervention, Jose Ricardo Leon Serrano
Hospitality Design Graduate Student Capstones
In a city populated by Luxurious Hotels, the streetscape is often neglected discouraging extended interaction of the pedestrian in the area. As a result, the topic of security in public spaces is being analyzed to bring to light the recent increase in violent offenses. Establishing additional principles of safety to the standard best practice guidelines will impact the image of our city promoting public safety. The issue arises as to the lack of urban squares and architectural features that allow for recurring criminal behavior. An increase in crime financially causes a loss in profit for the retail and hotels surrounding …
Am-Pac Basic Mobility Inpatient Short Form (Low Function) Psychometrics/Clinimetrics, Meghan Wonderling, David Miller, Selena Soria
Am-Pac Basic Mobility Inpatient Short Form (Low Function) Psychometrics/Clinimetrics, Meghan Wonderling, David Miller, Selena Soria
UNLV Theses, Dissertations, Professional Papers, and Capstones
Objective: To determine whether the Activity Measure for Post-Acute Care® Basic Mobility Inpatient Short Form (Low Function) (6-clicks LF) has increased responsiveness for patients with lower levels of physical function compared to the Activity Measure for Post-Acute Care Basic Mobility Inpatient Short Form (6-clicks). Design: Retrospective cohort study using original scores and simulated scores for assessment of internal responsiveness of the 6-clicks LF compared to the 6-clicks. Simulated 6-clicks and 6-clicks LF scores were created as a hypothetical future AM-PAC® score. Results: We found a statistically significant difference between the 6-clicks and simulated 6-clicks, t=24.8, p < 0.00 [two-tailed]. The effect size was large (d=1.2, r=0.51).There was a statistically significant difference between the 6-clicks LF and simulated 6-clicks LF, t=19.7, p < 0.00 [two-tailed]. The effect size was medium (d=0.91, r=0.41). Finally, for patients with a 6-clicks score in the bottom five-percentile (n=27), we found a statistically significant difference between the 6-clicks and 6-clicks LF, t=11.9, p < 0.00 [two-tailed]. Conclusion: Among patients scoring less than 15, the 6-clicks LF has greater internal responsiveness than the 6-clicks and thus demonstrates that the new low-level questions in the 6-clicks LF better quantify low-level patients’ functional level. Research using non-simulated data should be completed in the future to confirm these findings.
2021 Salary Scores: University Of Nevada, Las Vegas And University Of Nevada, Reno, Olivia K. Cheche, Emmanuel A. Berrelleza, Caitlin J. Saladino, William E. Brown Jr.
2021 Salary Scores: University Of Nevada, Las Vegas And University Of Nevada, Reno, Olivia K. Cheche, Emmanuel A. Berrelleza, Caitlin J. Saladino, William E. Brown Jr.
Higher Education
This fact sheet provides a comparative analysis on salary earnings for graduates of the University of Nevada, Las Vegas (UNLV) and the University of Nevada, Reno (UNR). Data are gathered from the GradReports website, which offers salary scores ranging from 0 to 100 for UNLV and UNR degree programs.