Digital Commons Network^™

The Distribution Of Ultra-Diffuse And Ultra-Compact Galaxies In The Frontier Fields, Steven Janssens, Roberto Abraham, Jean Brodie, Duncan Forbes, Aaron Romanowsky

Faculty Publications

Large low-surface-brightness galaxies have recently been found to be abundant in nearby galaxy clusters. In this paper, we investigate these ultra-diffuse galaxies (UDGs) in the six Hubble Frontier Fields galaxy clusters: A2744, MACS J0416.1−2403, MACS J0717.5+3745, MACS J1149.5+2223, AS1063, and A370. These are the most massive (1–3 × 1015 M ⊙) and distant (0.308 < z < 0.545) systems in which this class of galaxy has yet been discovered. We estimate that the clusters host of the order of ~200–1400 UDGs inside the virial radius (R 200), consistent with the UDG abundance–halo-mass relation found in the local universe, and suggest that UDGs may be formed in clusters. Within each cluster, however, we find that UDGs are not evenly distributed. Instead their projected spatial distributions are lopsided, and they are deficient in the regions of highest mass density as traced by gravitational lensing. While the deficiency of UDGs in central regions is not surprising, the lopsidedness is puzzling. The UDGs, and their lopsided spatial distributions, may be associated with known substructures late in their infall into the clusters, meaning that we find evidence both for formation of UDGs in clusters and for UDGs falling into clusters. We also investigate the ultra-compact dwarfs (UCDs) residing in the clusters, and find that the spatial distributions of UDGs and UCDs appear anticorrelated. Around 15% of UDGs exhibit either compact nuclei or nearby point sources. Taken together, these observations provide additional evidence for a picture in which at least some UDGs are destroyed in dense cluster environments and leave behind a residue of UCDs.

Effects Of Music On Mood During Basketball Play In Junior High School Physical Education, David C. Barney, Francie T. Pleban, Jemal Gishe

Faculty Publications

The incorporation of music in the physical education environment, during physical activity have been shown to be beneficial for participants. Lane (1999) created a conceptual framework focusing on asynchronous music, identifying four factors important to a given piece of music: 1) rhythm response, 2) musicality, 3) cultural impact, and 4) association. The study purpose was to investigate two conditions, with/without the incorporation of music, in the physical education environment on student moods in 948 junior high school students (501 males & 447 females) measured utilizing the Profile of Mood States (POMS) Short Form. Significant differences were observed in the mean …

Co2 Hydrogenation To High-Value Products Via Heterogeneous Catalysis, Run-Ping Ye, Jie Ding, Weibo Gong, Morris D. Argyle, Qin Zhong, Yujun Wang, Christopher K. Russell, Zhenghe Xu, Armistead G. Russell, Qiaohong Li, Maohong Fan, Yuan-Gen Yao

Faculty Publications

Recently, carbon dioxide capture and conversion, along with hydrogen from renewable resources, provide an alternative approach to synthesis of useful fuels and chemicals. People are increasingly interested in developing innovative carbon dioxide hydrogenation catalysts, and the pace of progress in this area is accelerating. Accordingly, this perspective presents current state of the art and outlook in synthesis of light olefins, dimethyl ether, liquid fuels, and alcohols through two leading hydrogenation mechanisms: methanol reaction and Fischer-Tropsch based carbon dioxide hydrogenation. The future research directions for developing new heterogeneous catalysts with transformational technologies, including 3D printing and artificial intelligence, are provided.

Comparison Of Charge Storage Properties Of Prussian Blue Analogues Containing Cobalt And Copper, Amanda Rensmo, Jennifer R. Hampton

Faculty Publications

Prussian blue analogues are of great interest as alternative battery materials because of their long life cycle and potential use of earth-abundant elements. In this work, thin film mixed-metal hexacyanoferrates (HCFs) based on NiCo and NiCu alloys were fabricated in an all electrochemical process. The structure and composition of the samples were characterized, along with the charge storage capacity and kinetics of the charge transfer reaction. For both NiCo-HCF and NiCu-HCF samples, the total charge capacity increased with the substitution of Ni with more Co or Cu, and the increase was larger for Cu samples than for Co samples. On …

Cosmogenic Neutron Production At The Sudbury Neutrino Observatory, B. Aharmim, S. N. Ahmed, A. E. Anthony, N. Barros, E. W. Beier, A. Bellerive, B. Beltran, M. Bergevin, S. D. Biller, R. Bonventre, K. Boudjemline, M. G. Boulay, B. Cai, E. J. Callaghan, J. Caravaca, Y. D. Chan, D. Chauhan, M. Chen, B. T. Cleveland, G. A. Cox, R. Curley, X. Dai, H. Deng, F. B. Descamps, J. A. Detwiler, P. J. Doe, G. Doucas, P. L. Drouin

Faculty Publications

Neutrons produced in nuclear interactions initiated by cosmic-ray muons present an irreducible background to many rare-event searches, even in detectors located deep underground. Models for the production of these neutrons have been tested against previous experimental data, but the extrapolation to deeper sites is not well understood. Here we report results from an analysis of cosmogenically produced neutrons at the Sudbury Neutrino Observatory. A specific set of observables are presented, which can be used to benchmark the validity of geant4 physics models. In addition, the cosmogenic neutron yield, in units of 10-4 cm2/(g·μ), is measured to be 7.28±0.09(stat)-1.12+1.59(syst) in pure …

The Effects Of Premarital Education Promotion Policies On U.S. Divorce Rates, Tiffany L. Clyde, Jocelyn S. Wikle, Alan J. Hawkins, Spencer L. James

Faculty Publications

Currently, 10 states have enacted policies to promote premarital education and counseling. However, no research has documented whether these policies have actually decreased divorce rates in implementing states. The purpose of this study is to assess the effects of premarital education promotion policies on divorce rates. First, we conducted an implementation study to understand how well each state implemented the policy. A combination of methods was used, including reviewing the legislative documents and archival records, as well as interviewing academics and key persons knowledgeable of the legislation. Following the implementation study, we conducted an evaluation study to analyze the effects …

Resource Theory Of Asymmetric Distinguishability, Xin Wang, Mark M. Wilde

Faculty Publications

This paper systematically develops the resource theory of asymmetric distinguishability, as initiated roughly a decade ago [Matsumoto, Reverse test and characterization of quantum relative entropy, arXiv:1010.1030]. The key constituents of this resource theory are quantum boxes, consisting of a pair of quantum states, which can be manipulated for free by means of an arbitrary quantum channel. We introduce bits of asymmetric distinguishability as the basic currency in this resource theory, and we prove that it is a reversible resource theory in the asymptotic limit, with the quantum relative entropy being the fundamental rate of resource interconversion. The distillable distinguishability is …

Resource Theory Of Asymmetric Distinguishability For Quantum Channels, Xin Wang, Mark M. Wilde

Faculty Publications

This paper develops the resource theory of asymmetric distinguishability for quantum channels, generalizing the related resource theory for states [Matsumoto, arXiv:1010.1030, Wang and Wilde, Phys. Rev. Research 1, 033170 (2019)10.1103/PhysRevResearch.1.033170]. The key constituents of the channel resource theory are quantum channel boxes, consisting of a pair of quantum channels, which can be manipulated for free by means of an arbitrary quantum superchannel (the most general physical transformation of a quantum channel). One main question of the resource theory is the approximate channel box transformation problem, in which the goal is to transform an initial channel box (or boxes) to a …

Child-Level Double Burden Of Malnutrition In The Mena And Lac Regions: Prevalence And Social Determinants, Hala Ghattas Ph.D., Yubraj Acharya, Zeina Jamaluddine, Moubadda Assi, Khalil El Asmar, Andrew D. Jones

Faculty Publications

Although the prevalence of obesity has rapidly increased in the low- and middle-income countries of the Middle East and North Africa (MENA) and Latin America and the Caribbean (LAC) regions, child undernutrition remains a public-health challenge. We examined region-specific sociodemographic determinants of this double burden of malnutrition, specifically, the co-occurrence of child stunting and overweight, using Demographic and Health Survey and Multiple Indicator Cluster Survey data (2003–2016) from 11 countries in the MENA (n = 118,585) and 13 countries in the LAC (n = 77,824) regions. We used multiple logistic regressions to model region-specific associations of maternal education and household …

Monte Carlo And Experimental Analysis Of A Novel Directional Rotating Scatter Mask Gamma Detection System, Julie V. Logan, Darren E. Holland, Larry W. Burggraf, Justin A. Clinton, Buckley E. O'Day Iii

Faculty Publications

Excerpt: This work demonstrates successful experimental operation of a prototype system to identify source direction which was modeled using a library of signals simulated using GEANT and a novel algorithm....

Is There More Than One Way To Talk About Sex? A Longitudinal Growth Mixture Model Of Parent-Adolescent Sex Communication, Laura M. Padilla-Walker, Adam A. Rogers, Ryan D. Mclean

Faculty Publications

Purpose: Parents can be effective and consistent sex educators of their children, but research suggests that most parents only engage in a one-time talk about sex with their children. That being said, we know little about the potential variability in trajectories of parent-child sex communication over time. Thus, the present study took a person-centered approach to parent-child sex communication about sexual risk and explored predictors and outcomes of varying trajectories.

Methods: Participants included 468 adolescents and their parents who took part in a longitudinal study every year from ages 14e18 years (52% female, 67% white, and 33% single parents). …

Modeling And Quantification Of Resilience In Complex Engineering Systems, Riccardo Patriarca, Seyedmohsen Hosseini

Faculty Publications

No abstract provided.

Chorioamnionitis: Case Definition & Guidelines For Data Collection, Analysis, And Presentation Of Immunization Safety Data, Alisa Kachikis, Linda O. Eckert, Christie Walker, Azucena Bardají, Frederick Varricchio, Heather S. Lipkind, Khady Diouf, Wan Ting Huang, Ronald Mataya, Mustapha Bittaye, Clare Cutland, Nansi S. Boghossian, Tamala Mallett Moore, Rebecca Mccall, Jay King, Shuchita Mundle, Flor M. Munoz, Caroline Rouse, Michael Gravett, Lakshmi Katikaneni, Kevin Ault, Nicola P. Klein, Drucilla J. Roberts, Sonali Kochhar, Nancy Chescheir

Faculty Publications

No abstract provided.

Neurodevelopmental Delay: Case Definition & Guidelines For Data Collection, Analysis, And Presentation Of Immunization Safety Data, Adrienne N. Villagomez, Flor M. Muñoz, Robin L. Peterson, Alison M. Colbert, Melissa Gladstone, Beatriz Macdonald, Rebecca Wilson, Lee Fairlie, Gwendolyn J. Gerner, Jackie Patterson, Nansi S. Boghossian, Vera Joanna Burton, Margarita Cortés, Lakshmi D. Katikaneni, Jennifer C.G. Larson, Abigail S. Angulo, Jyoti Joshi, Mirjana Nesin, Michael A. Padula, Sonali Kochhar, Amy K. Connery

Faculty Publications

No abstract provided.

Different Combinations Of Behavior Change Interventions And Frequencies Of Interpersonal Contacts Are Associated With Infant And Young Child Feeding Practices In Bangladesh, Ethiopia, And Vietnam, Sunny S. Kim, Phuong Hong Nguyen, Lan Mai Tran, Silvia Alayon, Purnima Menon, Edward A. Frongillo Jr.

Faculty Publications

Background: Social and behavior change communication interventions are integral to improving dietary and care practices, but evidence on the impact of the combination and intensity of these interventions in different contexts is scarce. Objectives: We examined the extent of and factors associated with intervention exposure: interpersonal communication (IPC) alone or with other interventions (i.e., mass media, community mobilization, or nutrition-sensitive agricultural activities), number of and factors associated with IPC contacts, and combinations of intervention components and number of contacts associated with infant and young child feeding (IYCF) practices. Methods: We used endline survey data from impact evaluations in Bangladesh, Ethiopia, …

The Antimicrobial Activity And Cellular Pathways Targeted By P-Anisaldehyde And Epigallocatechin Gallate In The Opportunistic Human Pathogen Pseudomonas Aeruginosa, Yetunde Adewumni, Sanchirmaa Namjilsuren, William D. Walker, Dahlia N. Amato, Douglas V. Amato, Olga V. Mavrodi, Derek L. Patton, Dmitri V. Mavrodi

Faculty Publications

Plant-derived aldehydes are constituents of essential oils that possess broad-spectrum antimicrobial activity and kill microorganisms without promoting resistance. In our previous study, we incorporated p-anisaldehyde from star anise into a polymer network called PANDAs (Pro-Antimicrobial Networks via Degradable Acetals) and used it as a novel drug delivery platform. PANDAs released p-anisaldehyde upon a change in pH and humidity, and controlled growth of the multi-drug resistant pathogen Pseudomonas aeruginosa PAO1. In this study, we identified cellular pathways targeted by p-anisaldehyde, by generating 10,000 transposon mutants of PAO1 and screened them for hypersensitivity to p-anisaldehyde. To improve the …

Search For B− → Λp⊽ ⊽ With The Babar Experiment, J. P. Lees, V. Poireau, V. Tisserand, E. Grauges, A. Palano, G. Eigen, D. N. Brown, Yu G. Kolomensky, M. Fritsch, H. Koch, T. Schroeder, R. Cheaib, C. Hearty, T. S. Mattison, J. A. Mckenna, R. Y. So, V. E. Blinov, A. R. Buzykaev, V. P. Druzhinin, Milind Purohit, Et. Al.

Faculty Publications

A search for the rare flavor-changing neutral current process B− → Λp̅ νv̅ using data from the BABAR experiment has been performed. A total of 424 fb⁻¹ of e⁺e⁻ collision data collected at the center-of-mass energy of the ϒ(4S) resonance is used in this study, corresponding to a sample of (471 ± 3) × 10⁶ BB̅ pairs. Signal B− → Λp̅ νv̅ candidates are identified by first fully reconstructing a B⁺ decay in one of many possible exclusive decays to hadronic final states, then examining detector activity that is not associated with …

Pesticide Seed Treatments Containing Neonicotinoids Have Limited Effect On Soil Microbial Community Structure Under Different Tillage Regimes, Jessica E. Mackay, Richard G. Smith, Jessica G. Ernakovich, Lukas T. Bernhardt

Faculty Publications

Pesticide seed treatments (PST) which contain fungicides and insecticides are commonly used in agriculture; however, little is known about their effect on soil microbial communities and soil health. Neonicotinoids – controversial insecticides which are common in PST – have received criticism due to potential non-target effects. While fungal pathogens need to be moderated, PST have the potential to disturb broader fungal communities which could lead to reduced nutrient cycling and poor soil health. Given the broad use of PST, their effect on soil fungi needs to be studied within the context of other agricultural management practices. For example, tillage regimes …

Proactive Energy Optimization In Residential Buildings With Weather And Market Forecasts, Cody Simmons, Joshua Arment, Kody M. Powell, John Hedengren

Faculty Publications

This work explores the development of a home energy management system (HEMS) that uses weather and market forecasts to optimize the usage of home appliances and to manage battery usage and solar power production. A Moving Horizon Estimation (MHE) application is used to find the unknown home model parameters. These parameters are then updated in a Model Predictive Controller (MPC) which optimizes and balances competing comfort and economic objectives. Combining MHE and MPC applications alleviates model complexity commonly seen in HEMS by using a lumped parameter model that is adapted to fit a high-fidelity model. Heating, ventilation, and air conditioning …

Quantum-Enhanced Advanced Ligo Detectors In The Era Of Gravitational-Wave Astronomy, M. Tse, Haocun Yu, N. Kijbunchoo, A. Fernandez-Galiana, P. Dupej, L. Barsotti, C. D. Blair, D. D. Brown, S. E. Dwyer, A. Effler, M. Evans, P. Fritschel, V. V. Frolov, A. C. Green, G. L. Mansell, F. Matichard, N. Mavalvala, D. E. Mcclelland, L. Mcculler, T. Mcrae, J. Miller, A. Mullavey, E. Oelker, I. Y. Phinney, D. Sigg, B. J.J. Slagmolen, T. Vo, R. L. Ward, C. Whittle, R. Abbott, C. Adams, R. X. Adhikari, A. Ananyeva

Faculty Publications

The Laser Interferometer Gravitational Wave Observatory (LIGO) has been directly detecting gravitational waves from compact binary mergers since 2015. We report on the first use of squeezed vacuum states in the direct measurement of gravitational waves with the Advanced LIGO H1 and L1 detectors. This achievement is the culmination of decades of research to implement squeezed states in gravitational-wave detectors. During the ongoing O3 observation run, squeezed states are improving the sensitivity of the LIGO interferometers to signals above 50 Hz by up to 3 dB, thereby increasing the expected detection rate by 40% (H1) and 50% (L1).

Argulus From The Pascagoula River, Ms, Usa, With An Emphasis On Those Of The Threatened Gulf Sturgeon, Acipenser Oxyinchus Desotoi, Michael J. Andres, Jeremy M. Higgs, Paul O. Grammer, Mark S. Peterson

Faculty Publications

Species of Argulus (Branchiura Thorell, 1864) are common ectoparasites of freshwater, estuarine, and marine fishes. Argulid identification and taxonomy is often confusing because many species are reported to parasitize multiple host species, have similar morphological characters, and come from various salinity regimes. Gulf sturgeon is an anadromous fish natal to drainages in the north-central Gulf of Mexico, and as with many endangered species, has a poorly documented parasite community. During Gulf sturgeon tagging and monitoring studies (2016–2019) in the Pascagoula River, MS, USA, species of Argulus were collected from Gulf sturgeon as well as other incidentally captured fishes. Argulus flavescens …

Search For Gravitational Waves From Scorpius X-1 In The Second Advanced Ligo Observing Run With An Improved Hidden Markov Model, B. P. Abbott, R. Abbott, T. D. Abbott, S. Abraham, F. Acernese, K. Ackley, C. Adams, R. X. Adhikari, V. B. Adya, C. Affeldt, M. Agathos, K. Agatsuma, N. Aggarwal, O. D. Aguiar, L. Aiello, A. Ain, P. Ajith, G. Allen, A. Allocca, M. A. Aloy, P. A. Altin, A. Amato, A. Ananyeva, S. B. Anderson, W. G. Anderson, S. V. Angelova, S. Antier, S. Appert, K. Arai, M. C. Araya, J. S. Areeda, M. Arène, N. Arnaud

Faculty Publications

We present results from a semicoherent search for continuous gravitational waves from the low-mass x-ray binary Scorpius X-1, using a hidden Markov model (HMM) to track spin wandering. This search improves on previous HMM-based searches of LIGO data by using an improved frequency domain matched filter, the J-statistic, and by analyzing data from Advanced LIGO's second observing run. In the frequency range searched, from 60 to 650 Hz, we find no evidence of gravitational radiation. At 194.6 Hz, the most sensitive search frequency, we report an upper limit on gravitational wave strain (at 95% confidence) of h095%=3.47×10-25 when marginalizing over …

Erratum: Measurement Of D+ Be 7 Cross Sections For Big-Bang Nucleosynthesis (Physical Review Letters (2019) 122 (182701) Doi: 10.1103/Physrevlett.122.182701), N. Rijal, I. Wiedenhöver, J. C. Blackmon, M. Anastasiou, L. T. Baby, D. D. Caussyn, P. Höflich, K. W. Kemper, E. Koshchiy, G. V. Rogachev

Faculty Publications

The cross sections of nuclear reactions between the radioisotope Be7 and deuterium, a possible mechanism of reducing the production of mass-7 nuclides in big-bang nucleosynthesis, were measured at center-of-mass energies between 0.2 and 1.5 MeV. The measured cross sections are dominated by the (d,a) reaction channel, towards which prior experiments were mostly insensitive. A new resonance at 0.36(5) MeV with a strength of ωγ=1.7(5) keV was observed inside the relevant Gamow window. Calculations of nucleosynthesis outcomes based on the experimental cross section show that the resonance reduces the predicted abundance of primordial Li7, but not sufficiently to solve the primordial …

Why Acute Ischemic Stroke Patients In The United States Use Or Do Not Use Emergency Medical Services Transport? Findings Of An Inpatient Survey, Sudha Xirasagar, Meng-Han Tsai, Khosrow Heidari, James W. Hardin, Yuqi Wu, Robert Wronski, Dana Hurley, Edward C. Jauch, Souvik Sen

Faculty Publications

Background: Patients with acute ischemic stroke (AIS) who use emergency medical services (EMS) receive quicker reperfusion treatment which, in turn, mitigates post-stroke disability. However, nationally only 59% use EMS. We examined why AIS patients use or do not use EMS.

Methods: During 2016–2018, a convenience sample of AIS patients admitted to a primary stroke center in South Carolina were surveyed during hospitalization if they were medically fit, available for survey when contacted, and consented to participate. The survey was programed into EpiInfo with skip patterns to minimize survey burden and self-administered on a touchscreen computer. Survey questions covered symptom characteristics, …

7-Epi-Clusianone, A Multi-Targeting Natural Product With Potential Chemotherapeutic, Immune-Modulating, And Anti-Angiogenic Properties, Wesley F. Taylor, Maria Yanez, Sara E. Moghadam, Mahdi Moridi Farimani, Sara Soroury, Samad N. Ebrahimi, Marzieh Tabefam, Ehsan Jabbarzadeh

Faculty Publications

Targeted therapies have changed the treatment of cancer, giving new hope to many patients in recent years. The shortcomings of targeted therapies including acquired resistance, limited susceptible patients, high cost, and high toxicities, have led to the necessity of combining these therapies with other targeted or chemotherapeutic treatments. Natural products are uniquely capable of synergizing with targeted and non-targeted anticancer regimens due to their ability to affect multiple cellular pathways simultaneously. Compounds which provide an additive effect to the often combined immune therapies and cytotoxic chemotherapies, are exceedingly rare. These compounds would however provide a strengthening bridge between the two …

Are Physical Measures Related To Patient-Centered Outcomes In Ards Survivors?, Kitty S. Chan Phd, Lisa Aronson Friedman Scm, Victor D. Dinglas Mph, Catherine L. Hough Md, Msc, Carl Shanholtz Md, E. Wesley Ely Md, Mph, Peter E. Morris Md, Pedro A. Mendez-Tellez Md, James C. Jackson Psyd, Ramona O. Hopkins Phd, Dale M. Needham Fcpa, Md, Phd

Faculty Publications

Objective: To inform selection of physical measures for studies of ARDS survivors within 12 months of ARDS Methods: Secondary analysis of data from 6-month survivors participating in a U.S. multicenter prospective study (ARDSNet Long-Term Outcome Study [ALTOS], N=134) or a multi-site prospective study in Baltimore, MD (Improving Care of Acute Lung Injury Patients [ICAP], N=99). Physical measures, assessed at 6-month follow-up, were categorized according to the World HealthOrganization’s International Classification of Disability and Health: body functions and structures, activity, and participation. Patient-centered outcomes were evaluated at 6 and 12- months: survival, hospitalization, alive at home status, and health-related quality of …

Use Of Modified Reineke's Stand Density Index In Predicting Growth And Survival Of Chinese Fir Plantations, Xiongqing Zhang, Quang V. Cao, Lele Lu, Hanchen Wang, Aiguo Duan, Jianguo Zhang

Faculty Publications

Stand density index (SDI) has played an important role in controlling stand stocking and modeling stand development in forest stands. Reineke's SDI (SDI-R) is based on a constant slope of -1.605 for the self-thinning line. For Chinese fir plantations, however, it has been reported that the self-thinning slope varied with site and climate, rendering SDI-R questionable. Remeasured data from 48 plots distributed in Fujian, Jiangxi, Guangxi, and Sichuan provinces were used to develop models for prediction of stand survival and basal area, with SDI-R incorporated as a predictor variable. Also included in the evaluation were growth models based on self-thinning …

Importance Of Refractory Ligands And Their Photodegradation For Iron Oceanic Inventories And Cycling, Christel Hassler, Damien Cabanes, Sonia Blanco-Ameijeiras, Sylvia G. Sander, Ronald Benner

Faculty Publications

Iron is an essential micronutrient that limits primary production in up to 40% of the surface ocean and influences carbon dioxide uptake and climate change. Dissolved iron is mostly associated with loosely characterised organic molecules, called ligands, which define key aspects of the iron cycle such as its residence time, distribution and bioavailability to plankton. Models based on in situ ligand distributions and the behaviour of purified compounds include long-lived ligands in the deep ocean, bioreactive ligands in the surface ocean and photochemical processes as important components of the iron cycle. Herein, we further characterise biologically refractory ligands in dissolved …

Effect Of Surface Roughness On Ultrasonic Inspection Of Electron Beam Melting Ti‐6al‐4v, Evan T. Hanks, Anthony N. Palazotto, David Liu

Faculty Publications

Experimental research was conducted on the effects of surface roughness on ultrasonic non-destructive testing of electron beam melted (EBM) additively manufactured Ti-6Al-4V. Additive manufacturing (AM) is a developing technology with many potential benefits, but certain challenges posed by its use require further research before AM parts are viable for widespread use in the aviation industry. Possible applications of this new technology include aircraft battle damage repair (ABDR), small batch manufacturing to fill supply gaps and replacement for obsolete parts. This paper aims to assess the effectiveness of ultrasonic inspection in detecting manufactured flaws in EBM-manufactured Ti-6Al-4V. Additively manufactured EBM products …

Discrete Structure Of The Brain Rhythms, L. Perotti, J. Devito, D. Bessis, Y. Dabaghian

Faculty Publications

Neuronal activity in the brain generates synchronous oscillations of the Local Field Potential (LFP). The traditional analyses of the LFPs are based on decomposing the signal into simpler components, such as sinusoidal harmonics. However, a common drawback of such methods is that the decomposition primitives are usually presumed from the onset, which may bias our understanding of the signal’s structure. Here, we introduce an alternative approach that allows an impartial, high resolution, hands-off decomposition of the brain waves into a small number of discrete, frequency-modulated oscillatory processes, which we call oscillons. In particular, we demonstrate that mouse hippocampal LFP contain …