cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Clifford Algebras in Symplectic Geometry and Quantum Mechanics
Creators: name: Binz, Ernst
name: de Gosson, Maurice A.
name: Hiley, Basil J.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The necessary appearance of Clifford algebras in the quantum description of fermions has prompted us to re-examine the fundamental role played by the quaternion Clifford algebra, C(0,2). This algebra is essentially the geometric algebra describing the rotational properties of space. Hidden within this algebra are symplectic structures with Heisenberg algebras at their core. This algebra also enables us to define a Poisson algebra of all homogeneous quadratic polynomials on a two-dimensional sub-space, Fa of the Euclidean three-space. This enables us to construct a Poisson Clifford algebra, H(F), of a finite dimensional phase space which will carry the dynamics. The quantum dynamics appears as a realization of H(F) in terms of a Clifford algebra consisting of Hermitian operators.
description: 17 pages
Estimating heritability of drug-induced liver injury from common variants and implications for future study designs
Creators: name: Overby, Casey Lynnette
name: Hripcsak, George M.
name: Shen, Yufeng
Publisher: name: Columbia University
Year: 2014
Subjects: subject: Human genome--Research
subject: Liver--Wounds and injuries
subject: Drugs--Side effects
subject: Heredity
subject: Systems biology
subject: Bioinformatics
subject: FOS: Computer and information sciences

description: Recent genome-wide association studies identified certain human leukocyote antigen (HLA) alleles as the major risk factors of drug-induced liver injuries (DILI). While these alleles often cause large relative risk, their predictive values are quite low due to low prevalence of idiosyncratic DILI. Finding additional risk factors is important for precision medicine. However, optimal design of further genetic studies is hindered by uncertain overall heritability of DILI. This is a common problem for low-prevalence pharmacological traits, since it is difficult to obtain clinical outcome data in families. Here we estimated the heritability (h2) of DILI from case-control genome-wide single nucleotide polymorphism data using a method based on random effect models. We estimated the proportion of h2 captured by common SNPs for DILI to be between 0.3 and 0.5. For co-amoxiclav induced DILI, chromosome 6 explained part of the heritability, indicating additional contributions from common variants yet to be found. We performed simulations to assess the robustness of the h2 estimate with limited sample size under low prevelance, a condition typical to studies on idiosyncratic pharmacological traits. Our findings suggest that common variants outside of HLA contribute to DILI susceptability; therefore, it is valuable to conduct further GWAS with expanded case collection.
On Pellarin's $L$-series
Creators: name: Perkins, Rudolph Bronson
Publisher: name: arXiv
Year: 2012
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11M38

description: Necessary and sufficient conditions are given for a negative integer to be a trivial zero of a new type of $L$-series recently discovered by F. Pellarin, and it is shown that any such trivial zero is simple. We determine the exact degree of the special polynomials associated to Pellarin's $L$-series. The theory of Carlitz polynomial approximations is developed further for both additive and $\mathbb{F}_q$-linear functions. Using Carlitz' theory we give generating series for the power sums occurring as the coefficients of the special polynomials associated to Pellarin's series, and a connection is made between the Wagner representation for $χ_t$ and the value of Pellarin's $L$-series at 1.
The Sznajd model with limited persuasion: competition between high-reputation and hesitant agents
Creators: name: Crokidakis, Nuno
name: de Oliveira, Paulo Murilo Castro
Publisher: name: arXiv
Year: 2011
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Social and Information Networks (cs.SI)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: In this work we study a modified version of the two-dimensional Sznajd sociophysics model. In particular, we consider the effects of agents' reputations in the persuasion rules. In other words, a high-reputation group with a common opinion may convince their neighbors with probability $p$, which induces an increase of the group's reputation. On the other hand, there is always a probability $q=1-p$ of the neighbors to keep their opinions, which induces a decrease of the group's reputation. These rules describe a competition between groups with high reputation and hesitant agents, which makes the full-consensus states (with all spins pointing in one direction) more difficult to be reached. As consequences, the usual phase transition does not occur for $p
description: 12 pages, 7 figures, submitted for publication
Current-induced forces in mesoscopic systems: a scattering matrix approach
Creators: name: Bode, Niels
name: Kusminskiy, Silvia Viola
name: Egger, Reinhold
name: von Oppen, Felix
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Nanoelectromechanical systems are characterized by an intimate connection between electronic and mechanical degrees of freedom. Due to the nanoscopic scale, current flowing through the system noticeably impacts the vibrational dynamics of the device, complementing the effect of the vibrational modes on the electronic dynamics. We employ the scattering matrix approach to quantum transport to develop a unified theory of nanoelectromechanical systems out of equilibrium. For a slow mechanical mode, the current can be obtained from the Landauer-Büttiker formula in the strictly adiabatic limit. The leading correction to the adiabatic limit reduces to Brouwer's formula for the current of a quantum pump in the absence of the bias voltage. The principal result of the present paper are scattering matrix expressions for the current-induced forces acting on the mechanical degrees of freedom. These forces control the Langevin dynamics of the mechanical modes. Specifically, we derive expressions for the (typically nonconservative) mean force, for the (possibly negative) damping force, an effective "Lorentz" force which exists even for time reversal invariant systems, and the fluctuating Langevin force originating from Nyquist and shot noise of the current flow. We apply our general formalism to several simple models which illustrate the peculiar nature of the current-induced forces. Specifically, we find that in out of equilibrium situations the current induced forces can destabilize the mechanical vibrations and cause limit-cycle dynamics.
description: "Applications" section considerably extended. Changes in layout. Version as published
Fractal-like Distributions over the Rational Numbers in High-throughput Biological and Clinical Data
Creators: name: Trifonov, Vladimir
name: Pasqualucci, Laura
name: Dalla-Favera, Riccardo
name: Rabadan, Raul
Publisher: name: Columbia University
Year: 2011
Subjects: subject: Computational biology
subject: Bioinformatics
subject: FOS: Computer and information sciences
subject: Statistics
subject: FOS: Mathematics

description: Recent developments in extracting and processing biological and clinical data are allowing quantitative approaches to studying living systems. High-throughput sequencing (HTS), expression profiles, proteomics, and electronic health records (EHR) are some examples of such technologies. Extracting meaningful information from those technologies requires careful analysis of the large volumes of data they produce. In this note, we present a set of fractal-like distributions that commonly appear in the analysis of such data. The first set of examples are drawn from a HTS experiment. Here, the distributions appear as part of the evaluation of the error rate of the sequencing and the identification of tumorogenic genomic alterations. The other examples are obtained from risk factor evaluation and analysis of relative disease prevalence and co-mordbidity as these appear in EHR. The distributions are also relevant to identification of subclonal populations in tumors and the study of quasi-species and intrahost diversity of viral populations.
3D Pharmacophoric Similarity improves Multi Adverse Drug Event Identification in Pharmacovigilance
Creators: name: Vilar Varela, Santiago
name: Tatonetti, Nicholas P.
name: Hripcsak, George M.
Publisher: name: Columbia University
Year: 2015
Subjects: subject: Drugs--Side effects
subject: Medical care
subject: Bioinformatics
subject: FOS: Computer and information sciences
subject: Medicine

description: Adverse drugs events (ADEs) detection constitutes a considerable concern in patient safety and public health care. For this reason, it is important to develop methods that improve ADE signal detection in pharmacovigilance databases. Our objective is to apply 3D pharmacophoric similarity models to enhance ADE recognition in Offsides, a pharmacovigilance resource with drug-ADE associations extracted from the FDA Adverse Event Reporting System (FAERS). We developed a multi-ADE predictor implementing 3D drug similarity based on a pharmacophoric approach, with an ADE reference standard extracted from the SIDER database. The results showed that the application of our 3D multi-type ADE predictor to the pharmacovigilance data in Offsides improved ADE identification and generated enriched sets of drug-ADE signals. The global ROC curve for the Offsides ADE candidates ranked with the 3D similarity score showed an area of 0.7. The 3D predictor also allows the identification of the most similar drug that causes the ADE under study, which could provide hypotheses about mechanisms of action and ADE etiology. Our method is useful in drug development, screening potential adverse effects in experimental drugs, and in drug safety, applicable to the evaluation of ADE signals selected through pharmacovigilance data mining.
Automated Image Quality Assessment for Fundus Images in Retinopathy of Prematurity
Creators: name: Coyner, Aaron S
name: Swan, Ryan
name: Kalpathy-Cramer, Jayshree
name: Kim, Sang Jin
name: Campbell, J Peter
name: Jonas, Karyn
name: Ostmo, Susan
name: Chan, RV Paul
name: Chiang, Michael F
Publisher: name: Zenodo
Year: 2017

description: The purpose of this study was to implement an algorithm for automatically assessing the quality of fundus images, and to evaluate its performance on a set of Retinopathy of Prematurity (ROP) images compared to expert assessment. The computer-based algorithm assessed image quality with strong correlation to the expert consensus rank, although not as high as individual expert correlation with the consensus rank.
SeqMule: automated pipeline for analysis of human exome/genome sequencing data
Creators: name: Guo, Yunfei
name: Ding, Xiaolei
name: Shen, Yufeng
name: Lyon, Gholson J.
name: Wang, Kai
Publisher: name: Columbia University
Year: 2015
Subjects: subject: Genomes--Data processing
subject: Genetics
subject: FOS: Biological sciences
subject: Software engineering
subject: Bioinformatics
subject: FOS: Computer and information sciences
subject: Systems biology

description: Next-generation sequencing (NGS) technology has greatly helped us identify disease-contributory variants for Mendelian diseases. However, users are often faced with issues such as software compatibility, complicated configuration, and no access to high-performance computing facility. Discrepancies exist among aligners and variant callers. We developed a computational pipeline, SeqMule, to perform automated variant calling from NGS data on human genomes and exomes. SeqMule integrates computational-cluster-free parallelization capability built on top of the variant callers, and facilitates normalization/intersection of variant calls to generate consensus set with high confidence. SeqMule integrates 5 alignment tools, 5 variant calling algorithms and accepts various combinations all by one-line command, therefore allowing highly flexible yet fully automated variant calling. In a modern machine (2 Intel Xeon X5650 CPUs, 48 GB memory), when fast turn-around is needed, SeqMule generates annotated VCF files in a day from a 30X whole-genome sequencing data set; when more accurate calling is needed, SeqMule generates consensus call set that improves over single callers, as measured by both Mendelian error rate and consistency. SeqMule supports Sun Grid Engine for parallel processing, offers turn-key solution for deployment on Amazon Web Services, allows quality check, Mendelian error check, consistency evaluation, HTML-based reports. SeqMule is available at http://seqmule.openbioinformatics.org.
Lestes spatula Fraser 1946
Creators: name: Márquez, Javier A.
name: Principe, Romina E.
name: Berejnoi, Diego E.
name: Rodríguez, José S.
name: Bedano, José C.
name: Molineri, Carlos
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Odonata
Lestidae
Lestes
Lestes spatula

description: Lestes spatula Fraser, 1946 Figure 3 Material examined. 3 males Site 2, J.A. Márquez and P.G. Brandolin cols. 1-XII-2016 (UNRC-ZIIO 0395, 0396, 0397). Identification. This species can be distinguished from other Lestes species in Argentina in having a minute spot at the end of each latero ventral carina at the venter of the pterothorax and in having the mesepistemal stripe 0.33 as wide as the mesepistemum. The cercus is straight in lateral view, and its inner margin has only a basal tooth.The paraprocts are as long as the cerci and have a basal inner carina. The internal lobe of penis is half as wide as the second segment, the small anterior portion is grooved anteriorly, and the posterior portion is reniform and bilobated (Muzón 1993: figs 12, 13, 16).
description: Published as part of Márquez, Javier A., Principe, Romina E., Berejnoi, Diego E., Rodríguez, José S., Bedano, José C. & Molineri, Carlos, 2019, Dragonflies and damselflies (Odonata) from Córdoba and San Luis provinces, Argentina, pp. 327-337 in Check List 15 (2) on page 330, DOI: 10.15560/15.2.327
description: {"references": ["Muzon, J (1993) Lestes spatula Fraser: description of the final larval instar and redescription of male and female adults (Zygoptera: Lestidae). Odonatologica 22 (4): 443 - 454."]}
Scaffold-free, Human Mesenchymal Stem Cell-Based Tissue Engineered Blood Vessels
Creators: name: Jung, Youngmee
name: Ji, Hayeun
name: Chen, Zaozao
name: Chan, Hon Fai
name: Atchison, Leigh
name: Klitzman, Bruce
name: Truskey, George
name: Leong, Kam W.
Publisher: name: Columbia University
Year: 2015
Subjects: Tissue engineering
Bioengineering
Mesenchymal stem cells
Biotechnology

description: Tissue-engineered blood vessels (TEBV) can serve as vascular grafts and may also play an important role in the development of organs-on-a-chip. Most TEBV construction involves scaffolding with biomaterials such as collagen gel or electrospun fibrous mesh. Hypothesizing that a scaffold-free TEBV may be advantageous, we constructed a tubular structure (1 mm i.d.) from aligned human mesenchymal cell sheets (hMSC) as the wall and human endothelial progenitor cell (hEPC) coating as the lumen. The burst pressure of the scaffold-free TEBV was above 200 mmHg after three weeks of sequential culture in a rotating wall bioreactor and perfusion at 6.8 dynes/cm2. The interwoven organization of the cell layers and extensive extracellular matrix (ECM) formation of the hMSC-based TEBV resembled that of native blood vessels. The TEBV exhibited flow-mediated vasodilation, vasoconstriction after exposure to 1 μM phenylephrine and released nitric oxide in a manner similar to that of porcine femoral vein. HL-60 cells attached to the TEBV lumen after TNF-α activation to suggest a functional endothelium. This study demonstrates the potential of a hEPC endothelialized hMSC-based TEBV for drug screening.
Effects of Baryon Mass Loss on Profiles of Large Galactic Dark Matter Haloes
Creators: name: Ragone-Figueroa, Cinthia
name: Granato, Gian Luigi
name: Abadi, Mario G.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We perform controlled numerical experiments to asses the effect of baryon mass loss on the inner structure of large galactic dark matter haloes. This mass expulsion is intended to mimic both the supernovae and AGN feedbacks, as well as the evolution of stellar populations. This study is meant in particular for precursors of massive Early Type Galaxies, wherein strong AGN feedback (often dubbed "QSO mode" in galaxy formation models) has been proposed to remove on a short timescale, of the order of a few dynamical times, a substantial fraction of their baryons. In a previous paper we evaluated the observational consequences (size increase) of this process on the galactic structure (Ragone-Figueroa & Granato 2011). Here we focus on the distribution of dark matter in the galactic region. It is shown that the inner region of the DM halo expands and its density profile flattens by a sizeable amount, with little dependence on the expulsion timescale. We also evaluate the effect of the commonly made approximation of treating the baryonic component as a potential that changes in intensity without any variation in shape. This approximation leads to some underestimates of the halo expansion and its slope flattening. We conclude that cuspy density profiles in ETGs could be difficult to reconcile with an effective AGN (or stellar) feedback during the evolution of these systems.
description: 9 Pages, 5 figures, MNRAS accepted. Final version with minor revision
Argentagrion ambiguum
Creators: name: Márquez, Javier A.
name: Principe, Romina E.
name: Berejnoi, Diego E.
name: Rodríguez, José S.
name: Bedano, José C.
name: Molineri, Carlos
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Odonata
Coenagrionidae
Argentagrion
Argentagrion ambiguum

description: Argentagrion ambiguum (Ris, 1904) Figure 6 Material examined. 1 male and 1 female (in tandem) Site 5, J.A. Márquez col. 15-II-2017 (UNRC-ZIIO 0238). Identification. This species can be distinguished from the other Argentagrion species by the broadly bilobate posterior lobe of the prothorax in both sexes and the male cercus about twice as long as wide in dorsal view. The dorsal branch of the male paraproct is rounded and the dorsum of abdominal segments 3–8 is mostly black (von Ellenrieder 2008: figs 21, 23, 58, 66, 67).
description: Published as part of Márquez, Javier A., Principe, Romina E., Berejnoi, Diego E., Rodríguez, José S., Bedano, José C. & Molineri, Carlos, 2019, Dragonflies and damselflies (Odonata) from Córdoba and San Luis provinces, Argentina, pp. 327-337 in Check List 15 (2) on page 331, DOI: 10.15560/15.2.327
The challenge of Social Impact Bond: the state of the art of the Italian context
Creators: name: Corvo, Luigi
name: Pastore, Lavinia
Publisher: name: European Journal of Islamic Finance
Year: 2019
Subjects: : Social Impact Bond, PA, Italian context, Social Finance

description: This paper aims to investigate Social Impact Bond (SIB), as a specific social finance tool able to involve various stakeholder groups in generating social value. The theoretical framework is the study of the outcome-based commissiong models of Anglo-Saxon origin and rapidly spread throughout Europe.
The research question concerns the main opportunities and challenges posed by the SIBs in the perspective of Italian public decision-makers. The results of the research consist in clustering of the various roles that the PA can assume in an SIB and in the analysis of the strengths and weaknesses of the Italian context with respect to the development of this tool.
description: European Journal of Islamic Finance, Special Issue Islamic and Social Finance: Comparing Policies and Solutions for Funding Public Infrastructures and Social Services  at Global Level
Topological Invariant and Quantum Spin Models from Magnetic π Fluxes in Correlated Topological Insulators
Creators: name: Assaad, F. F.
name: Bercx, M.
name: Hohenadler, M.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The adiabatic insertion of a πflux into a quantum spin Hall insulator gives rise to localized spin and charge fluxon states. We demonstrate that πfluxes can be used in exact quantum Monte Carlo simulations to identify a correlated Z_2 topological insulator using the example of the Kane-Mele-Hubbard model. In the presence of repulsive interactions, a πflux gives rise to a Kramers doublet of spinon states with a Curie law signature in the magnetic susceptibility. Electronic correlations also provide a bosonic mode of magnetic excitons with tunable energy that act as exchange particles and mediate a dynamical interaction of adjustable range and strength between spinons. πfluxes can therefore be used to build models of interacting spins. This idea is applied to a three-spin ring and to one-dimensional spin chains. Due to the freedom to create almost arbitrary spin lattices, correlated topological insulators with πfluxes represent a novel kind of quantum simulator potentially useful for numerical simulations and experiments.
description: 12 pages, 12 figures, published version
Information recycling beam-splitters for atom-interferometry with enhanced sensitivity
Creators: name: Haine, S. A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We propose a scheme to significantly enhance the sensitivity of atom-interferometry performed with Bose-Einstein condensates. When a two-photon Raman transition is used to split the condensate into two modes, some information about the number of atoms in one of the modes is transferred to one of the optical modes. We introduce a simple model to describe this process, and find that by processing this information in an appropriate way, the sensitivity of atom interferometry can be enhanced by more than a factor of 10 for realistic parameters.
description: 5 pages, 3 figures. Updated to published version
Ischnura fluviatilis Selys 1876
Creators: name: Márquez, Javier A.
name: Principe, Romina E.
name: Berejnoi, Diego E.
name: Rodríguez, José S.
name: Bedano, José C.
name: Molineri, Carlos
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Odonata
Coenagrionidae
Ischnura
Ischnura fluviatilis

description: Ischnura fluviatilis Selys, 1876 Figure 7 Material examined. 1 male Site 7, J.A. Márquez col. 8-I-2018 (UNRC-ZIIO 0339). Identification. This species can be distinguished from the other 2 species of Ischnura in Argentina in having the outer branch of the male cercus shorter than the inner branch (von Ellenrieder and Garrison 2007: fig. 95).
description: Published as part of Márquez, Javier A., Principe, Romina E., Berejnoi, Diego E., Rodríguez, José S., Bedano, José C. & Molineri, Carlos, 2019, Dragonflies and damselflies (Odonata) from Córdoba and San Luis provinces, Argentina, pp. 327-337 in Check List 15 (2) on page 331, DOI: 10.15560/15.2.327
description: {"references": ["von Ellenrieder N, Garrison RW (2007) Dragonflies and Damselflies (Insecta: Odonata) of the Argentine Yungas: Species composition and identification. Societa Zoologica ' La Torbiera', Italy, 103 pp."]}
Universality of the Heisenberg limit for estimates of random phase shifts
Creators: name: Hall, Michael J. W.
name: Berry, Dominic W.
name: Zwierz, Marcin
name: Wiseman, Howard M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The Heisenberg limit traditionally provides a lower bound on the phase uncertainty scaling as 1/, where is the mean number of photons in the probe. However, this limit has a number of loopholes which potentially might be exploited, to achieve measurements with even greater accuracy. Here we close these loopholes by proving a completely rigorous form of the Heisenberg limit for the average error over all phase shifts. Our result gives the first completely general, constraint-free and non-asymptotic statement of the Heisenberg limit. It holds for all phase estimation schemes, including multiple passes, nonlinear phase shifts, multimode probes, and arbitrary measurements.
description: Published version
Clinical and Economic Characteristics of Milestones Along the Continuum of Alzheimer's Disease: Transforming Functional Scores into Levels of Dependence
Creators: name: Kahle-Wrobleski, Kristin
name: Andrews, Jeffrey Scott
name: Belger, Mark
name: Gauthier, Serge
name: Stern, Yaakov
name: Rentz, Dorene M.
name: Galasko, Douglas
Publisher: name: Columbia University
Year: 2015
Subjects: Neurology
Alzheimer's disease
Caregivers

description: BACKGROUND: Because Alzheimer’s disease (AD) is characterized by a gradual decline, it can be difficult to identify distinct clinical milestones that signal disease advancement. Adapting a functional scale may be a useful way of staging disease progression that is more informative for healthcare systems. Objectives: To adapt functional scale scores into discrete levels of dependence as a way of staging disease progression that is more informative to care providers and stakeholders who rely on the functional impact of diseases to determine access to supportive services and interventions. Design: Analysis of data from the GERAS study. Setting: GERAS is an 18-month prospective, multicenter, naturalistic, observational cohort study reflecting the routine care of patients with AD in France, Germany, and the United Kingdom. Participants: Data were from baseline results of 1497 community-living patients, aged ≥55 years, diagnosed with probable AD and their caregivers. Measurements: We used data from the Alzheimer’s Disease Cooperative Study Activities of Daily Living Inventory (ADCS-ADL) and mapped items onto established categories of functional dependence, validated using clinical and economic measures. Cognitive function, behavioral symptoms, caregiver burden, and cost were assessed. Based on stages of functional dependence described by the Dependence Scale, individual ADCS-ADL items were used to approximate 6 dependence levels. Results: There was a significant relationship between assigned level of dependence derived from the ADCS-ADL score and cognitive severity category. As the assigned level of dependence increased, the associated clinical and economic indicators demonstrated a pattern of greater disease severity. Conclusions: This mapping provides initial support for dependence levels as appropriate interim clinical milestones that characterize the functional deficits associated with AD.
Erythemis attala
Creators: name: Márquez, Javier A.
name: Principe, Romina E.
name: Berejnoi, Diego E.
name: Rodríguez, José S.
name: Bedano, José C.
name: Molineri, Carlos
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Odonata
Libellulidae
Erythemis
Erythemis attala

description: Erythemis attala (Selys in Sagra, 1857) Figure 12 Material examined. 1 male Site 3, D.E. Berejnoi col. 20-XII-2017 (UNRC-ZIIO 0040). Identification. This species can be distinguished from the other species of Erythemis in Argentina by the lateral and ventral carinas of abdominal segment 4 separated by a distance equal to or less than one-fourth the length of the lateral carina, the thorax and abdomen are black in mature males, and the black basal spot on hind wings reaches beyond the cubito anal (CuP-crossing) cross vein (Williamson 1923).
description: Published as part of Márquez, Javier A., Principe, Romina E., Berejnoi, Diego E., Rodríguez, José S., Bedano, José C. & Molineri, Carlos, 2019, Dragonflies and damselflies (Odonata) from Córdoba and San Luis provinces, Argentina, pp. 327-337 in Check List 15 (2) on page 332, DOI: 10.15560/15.2.327
description: {"references": ["Williamson EB (1923) Notes on the genus Erythemis with a descrip- tion of a new species (Odonata). Miscellaneous Publications of the Museum of Zoology, University of Michigan 11: 1 - 18."]}
Interplay between non equilibrium and equilibrium spin torque using synthetic ferrimagnets
Creators: name: Klein, Christian
name: Petitjean, Cyril
name: Waintal, Xavier
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We discuss the current induced magnetization dynamics of spin valves F0|N|SyF where the free layer is a synthetic ferrimagnet SyF made of two ferromagnetic layers F1 and F2 coupled by RKKY exchange coupling. In the interesting situation where the magnetic moment of the outer layer F2 dominates the magnetization of the ferrimagnet, we find that the sign of the effective spin torque exerted on the free middle layer F1 is controlled by the strength of the RKKY coupling: for weak coupling one recovers the usual situation where spin torque tends to, say, anti-align the magnetization of F1 with respect to the pinned layer F0. However for large coupling the situation is reversed and the spin torque tends to align F1 with respect to F0. Careful numerical simulations in the intermediate coupling regime reveal that the competition between these two incompatible limits leads generically to spin torque oscillator (STO) behavior. The STO is found in the absence of magnetic field, with very significant amplitude of oscillations and frequencies up to 50 GHz or higher.
Clinical Trials in Hiv-Associated Cognitive Impairment: Cognitive and Functional Outcomes
Creators: name: Schifitto, Giovanni
name: Kieburtz, Karl
name: McDermott, Michael P.
name: McArthur, Justin C.
name: Marder, Karen
name: Sacktor, Ned
name: Palumbo, Donna
name: Selnes, Ola A.
name: Stern, Yaakov
name: Epstein, Leon G.
name: Albert, Steven M.
Publisher: name: Columbia University
Year: 2001
Subjects: Neurology
Cognition
HIV-positive persons

description: Cognitive and functional outcomes are of primary interest in the design of efficacy trials in HIV-associated cognitive impairment. In a longitudinal cohort study, weak associations were found between measures of cognitive performance and commonly used measures of daily functioning (mostly self-report measures) in HIV-infected individuals. Modifications of current functional scales or new functional instruments are needed to assess the clinical relevance of cognitive changes in clinical trials of HIV-associated cognitive impairment.
CARMA Survey Toward Infrared-bright Nearby Galaxies (STING) II: Molecular Gas Star Formation Law and Depletion Time Across the Blue Sequence
Creators: name: Rahman, Nurur
name: Bolatto, Alberto D.
name: Xue, Rui
name: Wong, Tony
name: Leroy, Adam K.
name: Walter, Fabian
name: Bigiel, Frank
name: Rosolowsky, Erik
name: Fisher, David B.
name: Vogel, Stuart N.
name: Blitz, Leo
name: West, Andrew A.
name: Ott, Juergen
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present an analysis of the relationship between molecular gas and current star formation rate surface density at sub-kpc and kpc scales in a sample of 14 nearby star-forming galaxies. Measuring the relationship in the bright, high molecular gas surface density ($\Shtwo\gtrsim$20 \msunpc) regions of the disks to minimize the contribution from diffuse extended emission, we find an approximately linear relation between molecular gas and star formation rate surface density, $\nmol\sim0.96\pm0.16$, with a molecular gas depletion time $\tdep\sim2.30\pm1.32$ Gyr. We show that, in the molecular regions of our galaxies there are no clear correlations between \tdep\ and the free-fall and effective Jeans dynamical times throughout the sample. We do not find strong trends in the power-law index of the spatially resolved molecular gas star formation law or the molecular gas depletion time across the range of galactic stellar masses sampled (\mstar $\sim$$10^{9.7}-10^{11.5}$ \msun). There is a trend, however, in global measurements that is particularly marked for low mass galaxies. We suggest this trend is probably due to the low surface brightness CO, and it is likely associated with changes in CO-to-H2 conversion factor.
description: To appear in ApJ, December 2011; 17 pages; 8 figures
Abuyogocoris tawitawi Schuh 1984
Creators: name: Menard, Katrina L.
name: Schuh, Randall T.
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Miridae
Abuyogocoris
Abuyogocoris tawitawi

description: Abuyogocoris tawitawi Schuh Figure 1 Abuyogocoris tawitawi Schuh, 1984: 197, figs. 648, 656, 662–664 (n. sp., diag., descr., DV, figs. head-pronotum, MG). DIAGNOSIS: Recognized by relatively large and bulging eyes; broad yellow-white transverse fascia, yellow-brown head, castaneous coloration of hemelytron and thorax; broad posterior process of left paramere directed perpendicular to base of paramere, and anterior process of left paramere blunt and small, directed perpendicular to posterior process of left paramere. DESCRIPTION: See Schuh (1984). HOSTS: Unknown. DISTRIBUTION: Philippine Islands. DISCUSSION: Abuyogocoris tawitawi is most similar in external dimensions and appearance to A. abuyog, but the coloration of the head and the pronotum differentiate the two. We could not compare the male genitalia of A. tawitawi with those of A. abuyog because the latter species is known only from the holotype, so was therefore not dissected. HOLOTYPE: PHILIPPINES: Tawitawi Group: Lapid at Manalik Channel, 5.07 ° N 119.81 ° E, 19 Nov 1961, Noona Dan Expedition, Holotype, 18 (00127968) (ZMUC) [not examined].
description: Published as part of Menard, Katrina L. & Schuh, Randall T., 2011, Revision Of Leucophoropterini: Diagnoses, Key To Genera, Redescription Of The Australian Fauna, And Descriptions Of New Indo-Pacific Genera And Species (Insecta: Hemiptera: Miridae), pp. 1-159 in Bulletin of the American Museum of Natural History 2011 (361) on page 19, DOI: 10.1206/361.1, http://zenodo.org/record/5410834
description: {"references": ["Schuh, R. T. 1984. Revision of the Phylinae (Hemiptera, Miridae) of the Indo-Pacific. Bulletin of the American Museum of Natural History 177 (1): 1 - 476."]}
A study on micro-patterning of polypyrrole using micro-electro-discharge machining
Creators: name: Anwar, Mohammed Muntakim
Publisher: name: University of British Columbia
Year: 2013

description: This thesis reports micro-patterning of polypyrrole based on micro-electro-discharge machining (μEDM). The patterning feasibility is investigated using air and EDM oil as the dielectric media for the process. The discharge generation and controlled removal of the material are observed in both dielectric media; however, processing in oil is shown to be superior in achieving higher machining quality. The use of a discharge voltage of 60 V without an external capacitor as part of the relaxation-type discharge circuit is found to enable stable and precision machining with 51 nm average surface roughness and 18 mA peak discharge current. Fine micro-patterning of polypyrrole film for a depth of 7.5 μm is demonstrated using a 20-μm-diameter electrode. Machining tests with varying voltages and capacitances indicates that the use of larger capacitances at 60 V does not enhance EDM removal much unlike typical μEDM of metals, whereas the use of larger voltages with stray capacitance shows significant enhancement; a hypothesis to explain these observations is proposed. Scaling effects in machining precision and surface quality are revealed to show that the use of smaller electrodes for smaller structure patterning provides higher structural integrity and smoother and/or cleaner surfaces, an advantageous feature as a micro-machining technique for this material. The generated discharge pulses were measured to exhibit a peak current of 37 mA and a pulse frequency of 0.83 MHz on average. The dependence of electrical contact to polypyrrole samples on the discharge current is evaluated from experiments and simulations. The effects of single spark discharges on polypyrrole and stainless steel were also analyzed. Energy dispersive X-ray was used to analyze the composition of polypyrrole before and after submerging to EDM oil. The results suggested that EDM (and its oil) does not alter composition to a great extent. This study also demonstrates application of μEDM to pattern polypyrrole deposited on catheter to create electrodes. The actuation of patterned catheter was also verified. The results suggest that μEDM is a promising micro-patterning technique for polypyrrole that will promote micro-device applications for the material and encourage extensions of the study to patterning of other conducting polymers.
Clinical Features Associated with Costs in Early AD: Baseline Data from the Predictors Study
Creators: name: Zhu, Carolyn W.
name: Scarmeas, Nikolaos
name: Torgan, Rebecca L.
name: Albert, Marilyn
name: Brandt, Jason
name: Blacker, Deborah
name: Sano, Mary
name: Stern, Yaakov
Publisher: name: Columbia University
Year: 2006
Subjects: Neurology
Alzheimer's disease--Patients--Care
Medical care, Cost of

description: BACKGROUND: Few studies on cost of caring for patients with Alzheimer disease (AD) have simultaneously considered multiple dimensions of disease costs and detailed clinical characteristics. OBJECTIVE: To estimate empirically the incremental effects of patients' clinical characteristics on disease costs. METHODS: Data are derived from the baseline visit of 180 patients in the Predictors Study, a large, multicenter cohort of patients with probable AD followed from early stages of the disease. All patients initially lived at home, in retirement homes, or in assisted living facilities. Costs of direct medical care included hospitalizations, outpatient treatment and procedures, assistive devices, and medications. Costs of direct nonmedical care included home health aides, respite care, and adult day care. Indirect costs were measured by caregiving time. Patients' clinical characteristics included cognitive status, functional capacity, psychotic symptoms, behavioral problems, depressive symptoms, extrapyramidal signs, comorbidities, and duration of illness. RESULTS: A 1-point increase in the Blessed Dementia Rating Scale score was associated with a $1,411 increase in direct medical costs and a $2,718 increase in unpaid caregiving costs. Direct medical costs also were $3,777 higher among subjects with depressive symptoms than among those who were not depressed. CONCLUSIONS: Medical care costs and unpaid caregiving costs relate differently to patients' clinical characteristics. Poorer functional status is associated with higher medical care costs and unpaid caregiving costs. Interventions may be particularly useful if targeted in the areas of basic and instrumental activities of daily living.
Linear response theory for long-range interacting systems in quasistationary states
Creators: name: Patelli, Aurelio
name: Gupta, Shamik
name: Nardini, Cesare
name: Ruffo, Stefano
Publisher: name: arXiv
Year: 2011
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Long-range interacting systems, while relaxing to equilibrium, often get trapped in long-lived quasistationary states which have lifetimes that diverge with the system size. In this work, we address the question of how a long-range system in a quasistationary state (QSS) responds to an external perturbation. We consider a long-range system that evolves under deterministic Hamilton dynamics. The perturbation is taken to couple to the canonical coordinates of the individual constituents. Our study is based on analyzing the Vlasov equation for the single-particle phase space distribution. The QSS represents stable stationary solution of the Vlasov equation in the absence of the external perturbation. In the presence of small perturbation, we linearize the perturbed Vlasov equation about the QSS to obtain a formal expression for the response observed in a single-particle dynamical quantity. For a QSS that is homogeneous in the coordinate, we obtain an explicit formula for the response. We apply our analysis to a paradigmatic model, the Hamiltonian mean-field model, that involves particles moving on a circle under Hamilton dynamics. Our prediction for the response of three representative QSSs in this model (the water-bag QSS, the Fermi-Dirac QSS, and the Gaussian QSS) is found to be in good agreement with $N$-particle simulations for large $N$. We also show the long-time relaxation of the water-bag QSS to the Boltzmann-Gibbs equilibrium state.
description: 13 pages, 4 figures; v2: typos fixed; v3: small changes, close to the published version
Arafuramiris biakanus Schuh 1984
Creators: name: Menard, Katrina L.
name: Schuh, Randall T.
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Miridae
Arafuramiris
Arafuramiris biakanus

description: Arafuramiris biakanus Schuh Figure 4 Arafuramiris biakanus Schuh, 1984: 202, figs. 665, 666, 676–678 (n. sp., diag., descr., DV, figs. head-pronotum, MG). DIAGNOSIS: Recognized by characters in generic diagnosis, relatively small eyes that take up only L total height of head in lateral view, width of vertex at least two times width of one eye, lateral margins of abdomen in female wider than lateral margins of abdomen, and indentation and clear differentiation between anterior and posterior lobes of pronotum. DESCRIPTION: See Schuh (1984). HOSTS: Unknown. DISTRIBUTION: New Guinea. DISCUSSION: We were able to examine recently collected specimens of this species from Papua New Guinea, confirming that the shape of the head and eyes are distinctive compared to all other species of Arafuramiris. Most species of Arafuramiris have the eyes dominating the dorsal and lateral surfaces of the head, whereas in A. biakanus the vertex dominates the head. HOLOTYPE: PAPUA NEW GUINEA: Morobe Prov.: Bulolo, 282 m., August 13, 1956, E.J. Ford, Jr. 18 (BPBM) [not examined]. SPECIMENS EXAMINED: INDONESIA: Biak Island: Biak Island: Strand, 0.99783 ° S 135.98089 ° E, 61 m, 24 Jun 1959, T.C. Maa, paratype, 18 (00196055) (AMNH), paratype, 18 (00321083), 1♀ (00321082) (BPBM). PAPUA NEW GUINEA: Madang Province: Baiteta, 5.017 ° S 145.75 ° E, 24 May 1995, O. Missa, 1♀ (00302157) (ISNB); 09 Apr 1996, O. Missa, Light Trap, 1♀ (00302120) (ISNB); 07 Jun 1996, O. Missa, 38 (00196011, 00196013, 00302156), 3♀ (00196018, 00302158, 00302160) (ISNB).
description: Published as part of Menard, Katrina L. & Schuh, Randall T., 2011, Revision Of Leucophoropterini: Diagnoses, Key To Genera, Redescription Of The Australian Fauna, And Descriptions Of New Indo-Pacific Genera And Species (Insecta: Hemiptera: Miridae), pp. 1-159 in Bulletin of the American Museum of Natural History 2011 (361) on page 35, DOI: 10.1206/361.1, http://zenodo.org/record/5410834
description: {"references": ["Schuh, R. T. 1984. Revision of the Phylinae (Hemiptera, Miridae) of the Indo-Pacific. Bulletin of the American Museum of Natural History 177 (1): 1 - 476."]}
Clinical Determinants of Dementia Related to Stroke
Creators: name: Tatemichi, Thomas K.
name: Desmond, David W.
name: Paik, Myunghee
name: Figueroa, Miguel
name: Gropen, Toby I.
name: Stern, Yaakov
name: Sano, Mary
name: Remien, Robert Howard
name: Williams, Janet B. W.
name: Mohr, Jay Preston
name: Mayeux, Richard Paul
Publisher: name: Columbia University
Year: 1993
Subjects: Neurology
Dementia
Cerebrovascular disease--Risk factors

description: Among 251 patients examined 3 months after the onset of acute ischemic stroke, we diagnosed dementia in 66(26.3%) by using modified DSM-III-R criteria based on neuropsychological, neurological, functional, and psychiatric examinations. We uses a logistic regression model to derive odds rations(ORs) for clinical factors independently related to dementia in this cross-sectional sample. Dementia was significantly associated with age, education, and race. A history of prior stroke (OR= 2.7) and diabetes mellitus (OR=2.6) was also independently related to dementia, but hypertension and cardiac disease were not. Stroke fearures associated with dementia included lacunar infarction compared with all other subtypes combined (OR=2.7) was also independently related to dementia, but hypertension and cardiac disease were not. Stroke features associated with dementia included lacunar infarction compared with all other subtypes combined (OR= 2.7) and hemisphetic laterality in relarion to brainstem or cerebellar location. There was a predominance of dementia in patients with left-sided lesions(Or-4.7), an effect not explained by aphasis. Dementia was especially common with infarctions in the left posterior cerebral and anterior cerebral artery territories. A major dominant hemispheral syndrome (reflecting size and laterality) was also independently associated with dementia (OR=3.9). We suggest that dementia after ischemic stroke is a result of multiple independent factors, including both small subcrtical and large cortical infarcts especially involving the left medial frontal and temporal regions, with additional contributions by demographic and vascular risk factors.
Multimodel Ensembling of Subseasonal Precipitation Forecasts over North America
Creators: name: Vigaud, Nicolas
name: Robertson, Andrew W.
name: Tippett, Michael K.
Publisher: name: Columbia University
Year: 2017
Subjects: Weather forecasting
Long-range weather forecasting
Precipitation forecasting

description: Probabilistic forecasts of weekly and week 3–4 averages of precipitation are constructed using extended logistic regression (ELR) applied to three models (ECMWF, NCEP, and CMA) from the Subseasonal-to- Seasonal (S2S) project. Individual and multimodel ensemble (MME) forecasts are verified over the common period 1999–2010. The regression parameters are fitted separately at each grid point and lead time for the three ensemble prediction system (EPS) reforecasts with starts during January–March and July–September. The ELR produces tercile category probabilities for each model that are then averaged with equal weighting. The resulting MME forecasts are characterized by good reliability but low sharpness. A clear benefit of multimodel ensembling is to largely remove negative skill scores present in individual forecasts. The forecast skill of weekly averages is higher in winter than summer and decreases with lead time, with steep decreases after one and two weeks. Week 3–4 forecasts have more skill along the U.S. East Coast and the southwestern United States in winter, as well as over west/central U.S. regions and the intra-American sea/east Pacific during summer. Skill is also enhanced when the regression parameters are fit using spatially smoothed ob- servations and forecasts. The skill of week 3–4 precipitation outlooks has a modest, but statistically significant, relation with ENSO and the MJO, particularly in winter over the southwestern United States.