cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The polarization observables T, P, and H and their impact on $γp \to pπ^0$ multipoles
Creators: name: Hartmann, J.
name: Dutz, H.
name: Anisovich, A. V.
name: Bayadilov, D.
name: Beck, R.
name: Becker, M.
name: Beloglazov, Y.
name: Berlin, A.
name: Bichow, M.
name: Böse, S.
name: Brinkmann, K. -Th.
name: Crede, V.
name: Dieterle, M.
name: Eberhardt, H.
name: Elsner, D.
name: Fornet-Ponse, K.
name: Friedrich, St.
name: Frommberger, F.
name: Funke, Ch.
name: Gottschall, M.
name: Gridnev, A.
name: Grüner, M.
name: Görtz, St.
name: Gutz, E.
name: Hammann, Ch.
name: Hannappel, J.
name: Hannen, V.
name: Herick, J.
name: Hillert, W.
name: Hoffmeister, Ph.
name: Honisch, Ch.
name: Jahn, O.
name: Jude, T.
name: Käser, A.
name: Kaiser, D.
name: Kalinowsky, H.
name: Kalischewski, F.
name: Klassen, P.
name: Keshelashvili, I.
name: Klein, F.
name: Klempt, E.
name: Koop, K.
name: Krusche, B.
name: Kube, M.
name: Lang, M.
name: Lopatin, I.
name: Makonyi, K.
name: Messi, F.
name: Metag, V.
name: Meyer, W.
name: Müller, J.
name: Nanova, M.
name: Nikonov, V.
name: Novinski, D.
name: Novotny, R.
name: Piontek, D.
name: Reeve, S.
name: Rosenbaum, Ch.
name: Roth, B.
name: Reicherz, G.
name: Rostomyan, T.
name: Runkel, St.
name: Sarantsev, A.
name: Schmidt, Ch.
name: Schmieden, H.
name: Schmitz, R.
name: Seifen, T.
name: Sokhoyan, V.
name: Thämer, Ph.
name: Thiel, A.
name: Thoma, U.
name: Urban, M.
name: van Pee, H.
name: Walther, D.
name: Wendel, Ch.
name: Wiedner, U.
name: Wilson, A.
name: Winnebeck, A.
name: Witthauer, L.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Data on the polarization observables T, P, and H for the reaction $γp\to pπ^0$ are reported. Compared to earlier data from other experiments, our data are more precise and extend the covered range in energy and angle substantially. The results were extracted from azimuthal asymmetries measured using a transversely polarized target and linearly polarized photons. The data were taken at the Bonn electron stretcher accelerator ELSA with the CBELSA/TAPS detector. Within the Bonn-Gatchina partial wave analysis, the new polarization data lead to a significant narrowing of the error band for the multipoles for neutral-pion photoproduction.
Affordance effects vs. Spatial Compatibility
Creators: name: Godard, Marc
name: Kalénine, Solène
name: Wamain, Yannick
Publisher: name: Open Science Framework
Year: 2022

description: Numerous experimental paradigms have been built in order to measure affordance effect. Delayed handle-response compatibility and action priming paradigms are two alternatives in this regards. One actual challenge is to measure affordance effect that is not tainted by spatial compatibility effect. The present project aimed to assess whether the different paradigms measured comparable affordances. In particular, we want to investigate whether the delayed handle-response compatibility paradigm evaluates affordance effect without being tainted by a spatial compatibility effect.
title: Русский язык: прошлое, настоящее, будущее: программа конференции (аннотирован-ные доклады, презентации, статьи)
titleType: Other
Creators: name: Лесников, Сергей Владимирович
Publisher: name: Альманах «ГОВОР»
Year: 2023

description: Данный сборник содержит программу и материалы III Международной Интернет-конференции «Русский язык: прошлое, настоящее, будущее. 2022» научных исследований из Азербайджана, Армении, Белоруссии, Болгарии, Вьетнама, Германии, Грузии, Израиля, Ин-дии, Ирана, Туниса, Турции, Китая, Казахстана, Киргизии, Молдавии, Монголии, Узбеки-стана, а также из МГУ им.М.В.Ломоносова, СПбГУ, РГПУ им.А.И.Герцена, БатумГУ, БашГУ, БГУ, БГПУ, БНТУ, БурятГУ, ВГПУ, ВГТУ, ГГПИ, ГГУ, ДГУ, ДФУ, ЕГУ, ИГХТУ, ИКГУ, ИППСП, КазНИТУ, КГУ, КФУ, ЛГПУ, МГЛУ, МГПУ, МИСИС, МНТУ, НБУ, НГЛУ, НГПИ, НГТУ, ННГУ, ОГПУ, ОГУ, ОрГМУ, ОУЭУП, ПГНИУ, ПГУ, РАУ, РГГУ, РГМУ, РНУ, РОСТГМУ, РУДН, РЭУ, СГСПУ, СГПИ, СГУ, СКФУ, СНИУ, СФУ, ТГУ, УрФУ, ХГУ, ЧГУ, ЧувГУ, ШГПУ, ЮФУ, Гос ИРЯ, ИРЯз, ИЯ, ИЛИ, ИБЯ и др.
Dirac's and Generalized Faddeev-Jackiw brackets for Einstein's theory in G $\rightarrow 0$ limit
Creators: name: Escalante, Alberto
name: Rodríguez-Tzompantzi, Omar
Publisher: name: arXiv
Year: 2015
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper the Dirac and Faddeev-Jackiw formulation for Einstein's theory in the $G \rightarrow 0$ limit is performed; the fundamental Dirac's and Faddeev-Jackiw brackets for the theory are obtained. First, the Dirac brackets are constructed by eliminating the second class constraints remaining the first class ones, then we fix the gauge and we convert the first class constraints into second class constraints and the new fundamental Dirac's brackets are computed. Alternatively, we reproduce all relevant Dirac's results by means of the symplectic method. We identify the Faddeev-Jackiw constraints and we prove that the Dirac and the Faddeev-Jackiw brackets coincide to each other. .
204. Case Studies
Creators: name: Adair, Ashley
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: 204. Case Studies
subject: conference proceedings
subject: digital preservation
subject: ipres2018
subject: preservation

description: The four papers in Session 204 explore topics and issues pertaining to the theme of Case Studies, providing examples of good practice and recent developments for digital preservation. Session chair: Ashley Adair.
A comparison of supervised learning algorithms
Creators: name: Aynetdinov, Ansar
Publisher: name: Humboldt-Universität zu Berlin
Year: 2018
Subjects: subject: überwachtes Lernen
subject: binäre Klassifikation
subject: maschinelles Lernen
subject: Entscheidungsbäume
subject: CART
subject: Naive Bayes
subject: logistiche Regression
subject: ROC
subject: AUC
subject: künstliche neuronale Netzwerke
subject: machine learning
subject: supervised learning
subject: binary classification
subject: artificial neural networks
subject: decision trees
subject: logistic regression
subject: 004 Datenverarbeitung; Informatik
subject: 330 Wirtschaft

description: Heutzutage sind viele verschiedene Machine Learning Algorithmen vorhanden. Als Konsequenz, mehr als ein Algorithmus kann auf ein ausgewähltes Problem angewandt werden. Dies führt zu einer Frage, wie unterschiedlich in solch einem Fall die Ergebnisse von den Algorithmen sein werden. In einem Versuch, diese Frage zu beantworten, werden in der folgenden Arbeit die Ergebnisse von vier sehr bekannten Supervised Learning Algorithmen, die auf ein binäres Klassifikationsproblem angewendet wurden, verglichen.
description: Today there are a lot of various machine learning algorithms available. As a consequence, when it comes to a specific problem, more than one algorithm can be applied to solve it. Therefore, a question is posed, about how different the results would be in such a case. In an attempt answer this question, this thesis compares the results of four well-known supervised learning algorithms, applied to a binary classification problem.
A cross-sectional study to test the association between regular physical exercise and interoception
Creators: name: Perakakis, Pandelis
name: JIMENEZ, ANA
name: Cordero, Pablo
name: Salvotti, Caterina
name: Ciria, Luis
name: Zarza-Rebollo, Juan Antonio
name: Sanabria, Daniel
Publisher: name: Open Science Framework
Year: 2022

description: We will measure and compare heartbeat perception, rubber hand illusion and heartbeat-evoked potential in physically active and physically inactive young adults.
Finite quantum gauge theories
Creators: name: Modesto, Leonardo
name: Piva, Marco
name: Rachwal, Leslaw
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We explicitly compute the one-loop exact beta function for a nonlocal extension of the standard gauge theory, in particular Yang-Mills and QED. The theory, made of a weakly nonlocal kinetic term and a local potential of the gauge field, is unitary (ghost-free) and perturbatively super-renormalizable. Moreover, in the action we can always choose the potential (consisting of one "killer operator") to make zero the beta function of running gauge coupling constant. The outcome is "a UV finite theory for any gauge interaction". Our calculations are done in D=4, but the results can be generalized to even or odd spacetime dimensions. We compute the contribution to the beta function from two different killer operators by using two independent techniques, namely the Feynman diagrams and the Barvinsky-Vilkovisky traces. By making the theories finite we are able to solve also the Landau pole problems, in particular in QED. Without any potential the beta function of the one-loop super-renormalizable theory shows a universal Landau pole in the running coupling constant in the ultraviolet regime (UV), regardless of the specific higher-derivative structure. However, the dressed propagator shows neither the Landau pole in the UV, nor the singularities in the infrared regime (IR).
description: 6 pages. arXiv admin note: text overlap with arXiv:1503.00261
Violation of Eigenstate Thermalization Hypothesis in Quantum Field Theories with Higher-Form Symmetry
Creators: name: Fukushima, Osamu
name: Hamazaki, Ryusuke
Publisher: name: arXiv
Year: 2023
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We elucidate how the presence of higher-form symmetries affects the dynamics of thermalization in isolated quantum systems. Under reasonable assumptions, we analytically show that a $p$-form symmetry in a $(d+1)$-dimensional quantum field theory leads to the breakdown of the eigenstate thermalization hypothesis for many nontrivial $(d-p)$-dimensional observables. For higher-form (i.e., $p\geq 1$) symmetry, this indicates the absence of thermalization for observables that are non-local but much smaller than the whole system size. We numerically demonstrate this argument for the (2+1)-dimensional $\mathbb{Z}_2$ lattice gauge theory. While local observables such as the plaquette operator thermalize, the non-local observable exciting a magnetic dipole instead relaxes to the generalized Gibbs ensemble that takes account of the $\mathbb{Z}_2$ 1-form symmetry.
description: 7 pages, 4 figures, supplemental material with 6 pages and 1 figure; v2: minor modifications, references added, published version in PRL
Η πρόσβαση στις πολιτιστικές εκδηλώσεις ως παράγοντας προώθησης της κοινωνικής συμπερίληψης των ατόμων με αναπηρία: Μια μελέτη των απόψεων των θεατών του Φεστιβάλ «Η Αντανάκλαση της Αναπηρίας στην Τέχνη»
Creators: name: Βάμβουρα, Βαρβάρα
name: Καρτασίδου, Λευκοθέα
Publisher: name: Culture - Journal of Culture in Tourism, Art & Education
Year: 2023

description: Το άρθρο παρουσιάζει το ερευνητικό εργαλείο που κατασκευάστηκε για την αξιολόγηση της πρόσβασης του 2ου Φεστιβάλ «Η Αντανάκλαση της Αναπηρίας στην Τέχνη – Reflection of Disability in Art», που διοργανώθηκε από το Πανεπιστήμιο Μακεδονίας τον Δεκέμβριο του 2019 (3-10/12/2019), καθώς και τα αποτελέσματα που προέκυψαν από την πρώτη εφαρμογή του (n=170). Το εν λόγω Φεστιβάλ έχει ως επίκεντρο την έννοια της πρόσβασης και βασική προτεραιότητα τη δημιουργία των απαραίτητων εκείνων συνθηκών για την ενθάρρυνση και διευκόλυνση της συμμετοχής των ατόμων με αναπηρία στις πολιτιστικές εκδηλώσεις, με οποιαδήποτε ιδιότητα αυτά επιλέξουν (μεταξύ άλλων, του καλλιτέχνη, του εθελοντή ή απλώς, του θεατή). Στο πλαίσιο αυτό, παρουσιάζονται οι απόψεις των θεατών του Φεστιβάλ αναφορικά με την έννοια της πρόσβασης, δηλαδή το σύνολο των χαρακτηριστικών που αυτό φέρει σε επίπεδο υποδομών, πληροφοριών και σχέσεων, και εξάγονται σημαντικά συμπεράσματα αναφορικά με τη συμβολή της στην προώθηση της κοινωνικής συμπερίληψης και ως εκ τούτου στον μετασχηματισμό του κοινωνικού χώρου εν γένει.
description: Culture - Journal of Culture in Tourism, Art & Education, Vol 1, No 1 (2021): Culture
Development and benchmarking of an open, self-consistent force field for proteins and small molecules from the Open Force Field Initiative
Creators: name: Cavender, Chapin E.
name: Behara, Pavan K.
name: Boothroyd, Simon
name: Dotson, David L.
name: Horton, Joshua T.
name: Mitchell, Joshua A.
name: Pulido, Ivan J.
name: Thompson, Matthew W.
name: Wagner, Jeffrey
name: Wang, Lily
name: Chodera, John D.
name: Cole, Daniel J.
name: Mobley, David L.
name: Shirts, Michael R.
name: Gilson, Michael K.
Publisher: name: Zenodo
Year: 2023
Subjects: Force Field, Protein, NMR

description: Poster presentation for the 67th Annual Meeting of the Biophysical Society, February 18-22, 2023, San Diego, CA, USA
description: Funding from National Institutes of Health grant GM132386.
Solanum asarifolium Kunth & Bouché, Ind. Sem. Hort. Berol.
Creators: name: Costa-Silva, Rafael
name: Agra, Maria De Fátima
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Solanales
Solanaceae
Solanum
Solanum asarifolium

description: 6. Solanum asarifolium Kunth & Bouché, Ind. Sem. Hort. Berol. 10. 1845
 Type:— A plant cultivated in Berlin in 1842 from seeds from Venezuela, Caracas, E. Otto s.n. (Holotype: B †, photo of holotype F-2562!; lectotype: P00430541!, designated here).
 Accepted name. Lycianthes asarifolia (Kunth & Bouché) Bitter (1919:423).
 Notes. The unnumbered collection of E. Otto at the Muséum National d’Histoire Naturelle of Paris (P-430541) donated by the Herbarium of Berlin in 1855 is designated as lectotype. The lectotype is in good condition, showing a plant with roots, two well-developed leaves, and one flower. It corresponds to the protologue of Solanum asarifolium Kunth & Bouché and is the only collection of Otto we have located.
description: Published as part of Costa-Silva, Rafael & Agra, Maria De Fátima, 2018, Lectotypifications of six taxa in Lycianthes (Solanaceae), pp. 297-300 in Phytotaxa 348 (4) on page 299, DOI: 10.11646/phytotaxa.348.4.6, http://zenodo.org/record/13709099
Altering Substrate Specificity of the Nuclease GEN
Creators: name: Moffatt, Caitlin
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2018

description: DNA damage occurs in many settings, including normal replication and exposure to radiation. Branched DNA structures such as Holliday junctions (HJs) and 5’ flaps are important intermediates formed in the process of DNA repair, and H. sapiens GEN1 is a nuclease that can repair these intermediates. In vitro, human GEN1 and the structurally similar Drosophila melanogaster GEN (DmGEN) cleave 5’ flaps more efficiently than HJs. Substrate specificity is thought to be determined by a helical arch region, adjacent to the active site, through which ssDNA may be threaded for cleavage. Homologs of GEN have variable arch regions, and thus different substrate specificities— while DmGEN has specificity for HJs, 5’ flaps, and replication forks, its ortholog from C. thermophilum (CtGEN1) lacks the arch region, and thus is limited to HJ activity. Conversely, its homolog found in H. sapiens (HsFEN1) exhibits specificity for 5’ flaps due to a different arch region. To manipulate the substrate specificity of DmGEN, I replaced the arch region with the corresponding region from both CtGEN1 and HsFEN1 to yield two chimeric proteins termed GENCtGEN1 and GENHsFEN1. I hypothesized that GENCtGEN1 would have specificity to only HJs and GENHsFEN1 would have specificity only to 5’ flaps. Nuclease assays revealed that neither GENCtGEN1 nor GENHsFEN1 was able to cleave HJs, suggesting that the swapped region plays a role in substrate binding or cleavage. Further research, including 5’ flap nuclease assays and in vivo experiments, is needed to better understand the consequences of only cleaving 5’ flaps or HJs in DNA repair. Ultimately, this work will offer novel insights into the role of the DmGEN nuclease including its substrate specificity in isolation and in the greater context of DNA damage repair pathways in Drosophila and humans alike.
Development of a self-consistent force field for proteins and small molecules from the Open Force Field Initiative
Creators: name: Cavender, Chapin E.
name: Behara, Pavan K.
name: Boothroyd, Simon
name: Dotson, David L.
name: Gokey, Trevor
name: Horton, Joshua T.
name: Mitchell, Joshua A.
name: Pulido, Ivan J.
name: Thompson, Matthew W.
name: Wagner, Jeffrey
name: Wang, Lily
name: Chodera, John D.
name: Cole, Daniel J.
name: Mobley, David L.
name: Shirts, Michael R.
name: Gilson, Michael K.
Publisher: name: Zenodo
Year: 2023
Subjects: Force Field, Protein, NMR

description: Summary of progress on the development of a SMIRNOFF force field that models proteins and small molecules self-consistently from the Open Force Field Initiative. Includes a description of design goals and parametrization strategy and a presentation of force field performance on quantum chemical validation data, NMR scalar couplings for backbones of short unstructured peptides, and RMSD over 1 miccrosecond for the 56-residue protein GB3.
description: Funding from National Institutes of Health grant GM132386.
High Resolution Imaging of PHIBSS z~2 Main Sequence Galaxies in CO J=1-0
Creators: name: Bolatto, A. D.
name: Warren, S. R.
name: Leroy, A. K.
name: Tacconi, L. J.
name: Bouché, N.
name: Schreiber, N. M. Förster
name: Genzel, R.
name: Cooper, M. C.
name: Fisher, D. B.
name: Combes, F.
name: García-Burillo, S.
name: Burkert, A.
name: Bournaud, F.
name: Weiss, A.
name: Saintonge, A.
name: Wuyts, S.
name: Sternberg, A.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present Karl G. Jansky Very Large Array observations of the CO J=1-0 transition in a sample of four $z\sim2$ main sequence galaxies. These galaxies are in the blue sequence of star-forming galaxies at their redshift, and are part of the IRAM Plateau de Bure HIgh-$z$ Blue Sequence Survey (PHIBSS) which imaged them in CO J=3-2. Two galaxies are imaged here at high signal-to-noise, allowing determinations of their disk sizes, line profiles, molecular surface densities, and excitation. Using these and published measurements, we show that the CO and optical disks have similar sizes in main-sequence galaxies, and in the galaxy where we can compare CO J=1-0 and J=3-2 sizes we find these are also very similar. Assuming a Galactic CO-to-H$_2$ conversion, we measure surface densities of $Σ_{mol}\sim1200$ M$_\odot$pc$^{-2}$ in projection and estimate $Σ_{mol}\sim500-900$ M$_\odot$pc$^{-2}$ deprojected. Finally, our data yields velocity-integrated Rayleigh-Jeans brightness temperature line ratios $r_{31}$ that are approximately unity. In addition to the similar disk sizes, the very similar line profiles in J=1-0 and J=3-2 indicate that both transitions sample the same kinematics, implying that their emission is coextensive. We conclude that in these two main sequence galaxies there is no evidence for significant excitation gradients or a large molecular reservoir that is diffuse or cold and not involved in active star-formation. We suggest that $r_{31}$ in very actively star-forming galaxies is likely an indicator of how well mixed the star formation activity and the molecular reservoir are.
description: To appear in ApJ
An ensemble of convolution-based methods for fault detection using vibration signals
Creators: name: Lee, Xian Yeow
name: Kumar, Aman
name: Vidyaratne, Lasitha
name: Rao, Aniruddha Rajendra
name: Farahat, Ahmed
name: Gupta, Chetan
Publisher: name: arXiv
Year: 2023
Subjects: subject: Signal Processing (eess.SP)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: Applications (stat.AP)
subject: Machine Learning (stat.ML)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: This paper focuses on solving a fault detection problem using multivariate time series of vibration signals collected from planetary gearboxes in a test rig. Various traditional machine learning and deep learning methods have been proposed for multivariate time-series classification, including distance-based, functional data-oriented, feature-driven, and convolution kernel-based methods. Recent studies have shown using convolution kernel-based methods like ROCKET, and 1D convolutional neural networks with ResNet and FCN, have robust performance for multivariate time-series data classification. We propose an ensemble of three convolution kernel-based methods and show its efficacy on this fault detection problem by outperforming other approaches and achieving an accuracy of more than 98.8\%.
description: 12 Pages, 9 Figures, 2 Tables. Accepted at ICPHM 2023
Η ανάπτυξη της κριτικής σκέψης μέσω καινοτόμων πρακτικών του εκπαιδευτικού δράματος σε μαθητές δημοτικού
Creators: name: Δήμα, Αικατερίνη
name: Τσιάρας, Αστέριος
Publisher: name: Culture - Journal of Culture in Tourism, Art & Education
Year: 2023

description: Η παρούσα μελέτη εστιάζει σε ένα καινοτόμο πρόγραμμα παρέμβασης βασισμένο στις τεχνικές του εκπαιδευτικού δράματος που στοχεύει να καλλιεργήσει τις δεξιότητες τις κριτικής σκέψης των μαθητών της Ε΄τάξης του δημοτικού σχολείου. Το οιονεί πείραμα εφαρμόστηκε το 2016 και στηρίχθηκε στη μεθοδολογία της πειραματικής έρευνας με σκοπό την ανάπτυξη πέντε δεξιοτήτων της κριτικής σκέψης. Η επιλογή του δημοτικού σχολείου του Ναυπλίου έγινε με δειγματοληψία σκοπιμότητας και διήρκησε 3 μήνες. Στο διάστημα αυτό υλοποιήθηκαν 12 καινοτόμες παρεμβάσεις βασισμένες στις τεχνικές του εκπαιδευτικού δράματος. Την πειραματική ομάδα αποτελούσαν 25 παιδιά ηλικίας 10-11 ετών, όπως και την ομάδα ελέγχου. Ακολουθήθηκε η πολυμεθοδική προσέγγιση στην επιλογή των ερευνητικών εργαλείων και η έρευνα ολοκληρώθηκε με την τριγωνοποίηση των ποσοτικών και ποιοτικών δεδομένων που συλλέχθηκαν. Τα αποτελέσματα της έρευνας κατέδειξαν ότι ένα πρόγραμμα παρέμβασης βασισμένο σε καινοτόμες πρακτικές του εκπαιδευτικού δράματος δύναται να αναπτύξει την κριτική σκέψη των μαθητών του δημοτικού σχολείου.
description: Culture - Journal of Culture in Tourism, Art & Education, Vol 1, No 1 (2021): Culture
Consequences and control of multi-scale (dis)order in chiral magnetic textures
Creators: name: Goodge, Berit H.
name: Gonzalez, Oscar
name: Xie, Lilia S.
name: Bediako, D. Kwabena
Publisher: name: arXiv
Year: 2023
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Transition metal-intercalated transition metal dichalcogenides (TMDs) are promising platforms for next-generation spintronic devices based on their wide range of electronic and magnetic phases, which can be tuned by varying the host lattice or the identity of the intercalant, along with its stoichiometry and spatial order. Some of these compounds host a chiral magnetic phase in which the helical winding of magnetic moments propagates along a high-symmetry crystalline axis. Previous studies have demonstrated that variation in intercalant concentrations can have a dramatic impact on the formation of chiral domains and ensemble magnetic properties. However, a systematic and comprehensive study of how atomic-scale order and disorder impacts collective magnetic behavior are so far lacking. Here, we leverage a combination of imaging modes in the (scanning) transmission electron microscope (S/TEM) to directly probe (dis)order across multiple length scales and show how subtle changes in the atomic lattice can be leveraged to tune the mesoscale spin textures and bulk magnetic response, with direct implications for the fundamental understanding and technological implementation of such compounds.
Attachment Style and Social Fear in Dogs from Commercial Breeding Kennels
Creators: name: Stahl, Allegra Kathryn
Publisher: name: Purdue University Graduate School
Year: 2023
Subjects: Animal welfare
Animal behaviour

description: Much of the demand for purebred dogs in the USA is met by commercial breeding kennels (CBKs). In CBKs, adult dogs have been reported to exhibit signs of fear towards strangers. Social fear is a particular welfare concern as it may lead to acute and chronic stress in the kennel, and later, after dogs are retired and rehomed. Studies on pet and shelter dogs have shown that the type of attachment style dogs have with their caretakers is associated with their social behavior towards strangers. Thus, the aims of this study were to characterize the attachment styles of dogs from CBKs to their caretakers, and investigate relationships between the types of attachment styles observed and social fear behaviors in this population of dogs. Forty-eight adult dogs were tested from three CBKs in Indiana, USA. Each dog was subjected to a standard battery of tests, including a Secure Base test to classify attachment styles, a Stranger Arena test to measure the duration and frequency of key social behaviors toward a stranger, and a Paired-Effect test to measure the duration and frequency of social behaviors towards a stranger in the presence of a caretaker. Twenty (41.67%) dogs were classified as secure, 16 (33.33%) as insecure ambivalent, 9 (18.75%) as insecure avoidant, and 3 (6.25%) as insecure disorganized. ANOVA tests showed that secure and ambivalent dogs approached the stranger more frequently (F2,45 = 11.865, p < 0.001), spent more time in close proximity (F2,45 = 15.968, p < 0.001), and solicited contact more frequently (F2,45 = 4.58, p = 0.023) from them than did avoidant dogs. Wilcoxon Signed-Rank Tests showed that secure, ambivalent, and avoidant dogs all initially approached the stranger more quickly in the paired-effect test than in the stranger arena test (p < 0.05). Secure and ambivalent dogs also spent more time in proximity to (p < 0.001) and solicited more contact from (p < 0.01) the stranger in the paired-effect test than in the stranger arena test. These results suggest that there is an association between type of attachment style and fear behaviors towards a stranger in this sample of dogs. Understanding connections between attachment style and social fear, and their implications for stress and welfare in dogs from CBKs may help inform breeders’ selection criteria and breeding decisions. It may also inform breeders’ socialization, social interactions, and related management practices, which in turn may help to reduce dogs’ social fear and enhance their long- term welfare outcomes in the kennel. This understanding may also aid rehoming efforts. With this increased understanding, breeders could inform new owners about behaviors they can expect from their dogs which may help avoid a potential mismatch in expectations. This in turn may help keep dogs in their homes and improve their welfare in the long-term.
Discovery and characterization of a novel antimicrobial peptide from Houttuynia cordata (chameleon plant) using PepSAVI-MS
Creators: name: Wu, Xuelan
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2017

description: While historical screening efforts on drug discovery have largely focused on small molecule constituents of natural products, the antimicrobial drugs made from these small molecules have cultivated resistance in many microorganisms. Recent studies have shown that ribosomally-synthesized, post-translationally-modified peptide natural products (RiPPs) have the potential to address this urgent need for new therapeutic compounds due to their target specificity, high potency and metabolic stability. While these bioactive RiPPs are ubiquitously expressed in natural products, plants are a promising and largely unexplored source for these peptides. To expedite the search for novel bioactive peptides, the PepSAVI-MS pipeline was developed in the Hicks Lab. This pipeline begins with zero knowledge about the peptide profile of the species, but employs mass spectrometry and statistics to quickly determine the most-likely bioactive peptide targets. In this paper, Houttuynia cordata (chameleon plant) is subjected to PepSAVI-MS. Our data showed that fractions of its peptide library exhibit strong bioactivity against Escherichia coli, as well as the multi-drug resistant pathogens Acinetobacter baumannii, Klebsiella pneumoniae, and Staphylococcus aureus (gram-positive). The putative antimicrobial peptide candidates were identified using a hybrid LC-MS/MS and statistical analysis-based approach. This paper will focus on the discovery and characterization of the peptide candidate that has the highest probability to possess antimicrobial property.
Linear Stability of Hill's Vortex to Axisymmetric Perturbations
Creators: name: Protas, Bartosz
name: Elcrat, Alan
Publisher: name: arXiv
Year: 2015
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We consider the linear stability of Hill's vortex with respect to axisymmetric perturbations. Given that Hill's vortex is a solution of a free-boundary problem, this stability analysis is performed by applying methods of shape differentiation to the contour dynamics formulation of the problem in a 3D axisymmetric geometry. This approach allows us to systematically account for the effect of boundary deformations on the linearized evolution of the vortex under the constraint of constant circulation. The resulting singular integro-differential operator defined on the vortex boundary is discretized with a highly accurate spectral approach. This operator has two unstable and two stable eigenvalues complemented by a continuous spectrum of neutrally-stable eigenvalues. By considering a family of suitably regularized (smoothed) eigenvalue problems solved with a range of numerical resolutions we demonstrate that the corresponding eigenfunctions are in fact singular objects in the form of infinitely sharp peaks localized at the front and rear stagnation points. These findings thus refine the results of the classical analysis by Moffatt & Moore (1978).
description: 29 pages, 9 figures; accepted for publication in Journal of Fluid Mechanics
Lycianthes anomala Bitter 1919
Creators: name: Dean, Ellen A.
name: Reyes, Miriam
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Solanales
Solanaceae
Lycianthes
Lycianthes anomala

description: Lycianthes anomala Bitter (1919: 514)
 Type (lectotype, designated here):— MEXICO. Veracruz: Rio Blanco, Orizaba, Bourgeau 2536 (BR barcode 000000552905 [digital photo!], isolectotypes G barcode G00415142 [digital photo!], GH barcode 00077065 [digital photo!], K barcode K000063121 [digital photo!], MPU barcode MPU310734 [digital photo!], P barcode P00385091 [digital photo!], P barcode P00385092 [digital photo!], S [cited by Bitter, but not seen]; image of the lectotype is available at http://www.br.fgov.be/RESEARCH/COLLECTIONS/ HERBARIUM/detail.php?ID=503587).
 Nomenclatural notes:— Bitter (1919) cited three gatherings in the protologue: Bourgeau 2536, Bourgeau 1753, Ross 1158, and he cited the herbaria housing the specimens that he examined (BR, G, MPU, P, and S). We located most of the original material that he cited and annotated: Bourgeau 2536 (BR barcode 000000552905]), G barcode G00415142, MPU barcode MPU310734, P barcode P00385091, P barcode P00385092, S [not seen]); Bourgeau 1753 (BR barcode 000000552839, G barcode G00415141, M barcode M-0171795, MPU barcode MPU310733, P barcode P00368664, P barcode P00368663, S [not seen]; Ross 1158 (M barcode M-0171796). The Bourgeau 2536 specimen at BR (BR barcode 000000552905) is selected here as the lectotype for the name Lycianthes anomala.
 Taxonomic notes:— Lycianthes anomala is an epiphytic vine or shrub with dendritic trichomes and purple, stellate corollas. Traditionally, it has been treated as a Mexican endemic (known from the states of Veracruz and Oaxaca), but it may also occur in Central America (Reyes Cornejo 2015, Villaseñor 2016).
description: Published as part of Dean, Ellen A. & Reyes, Miriam, 2018, Lectotypification of names in the genus Lycianthes (Solanaceae), pp. 39-46 in Phytotaxa 349 (1) on page 40, DOI: 10.11646/phytotaxa.349.1.4, http://zenodo.org/record/13709175
Kondo Destruction in Heavy Fermion Quantum Criticality and the Photoemission Spectrum of YbRh$_2$Si$_2$
Creators: name: Paschen, S.
name: Friedemann, S.
name: Wirth, S.
name: Steglich, F.
name: Kirchner, S.
name: Si, Q.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Heavy fermion metals provide a prototype setting to study quantum criticality. Experimentally, quantum critical points have been identified and studied in a growing list of heavy fermion compounds. Theoretically, Kondo destruction has provided a means to characterize a class of unconventional quantum critical points that goes beyond the Landau framework of order-parameter fluctuations. Among the prominent evidence for such local quantum criticality have been measurements in YbRh$_2$Si$_2$. A rapid crossover is observed at finite temperatures in the isothermal field dependence of the Hall coefficient and other transport and thermodynamic quantities, which specifies a $T^*(B)$ line in the temperature ($T$)-magnetic field ($B$) phase diagram. Here, we discuss what happens when temperature is raised, by analyzing the ratio of the crossover width to the crossover position. With this ratio approaching unity at $T \gtrsim 0.5$ K, YbRh$_2$Si$_2$ at zero magnetic field belongs to the quantum-critical fluctuation regime, where the single-particle spectral function has significant spectral weight at both the small and large Fermi surfaces. This implies that, in this temperature range, any measurements sensitive to the Fermi surface will also see a significant spectral weight at the large Fermi surface. The angle-resolved photoemission spectroscopy (ARPES) experiments recently reported for YbRh$_2$Si$_2$ at $T>1$ K are consistent with this expectation, and therefore support the association of the $T^*(B)$ line with the physics of Kondo destruction.
description: submitted to proceedings of ICM15
Larger head displacement to optic flow presented in the lower visual field.
Creators: name: Fujimoto, Kanon
Publisher: name: Open Science Framework
Year: 2022

description: Optic flow that simulates self-motion often produces postural adjustment. Although literature suggested that human postural control considerably depends on visual inputs from the lower field in the environment, effects of the vertical location of optic flow are not well investigated on postural response. Here, we examined whether optic flow presented in the lower visual field produces a stronger postural response than optic flow in the upper visual field. Either expanding or contracting the optic flow was presented in three visual locations (upper, lower, and full visual fields) on an Oculus Rift head-mounted display. Head displacement and vection strength was measured. Results showed larger head displacement under the optic flow presentation in the lower visual field, than in the upper visual field, but only for the early period of the presentation of the contracting optic flow. Full visual field condition also produced larger head displacement than the upper visual field condition, but for contraction only. Vection was stronger for the lower visual field than the upper visual field, stronger for full visual field than upper and lower visual field. Our findings support the notion that more ecologically relevant information has a more important role in human postural control and self-motion perception.
Κράτα μου το χέρι για μια βουτιά στο χθες: Η Μύρτις ζωντανεύει το παρελθόν στη σχολική τάξη
Creators: name: Δημητριάδης, Δημήτρης
name: Παπαγρηγοράκης, Μανώλης
Publisher: name: Culture - Journal of Culture in Tourism, Art & Education
Year: 2023

description: Στο παρόν άρθρο εξετάζονται οι λόγοι αλλά και οι τρόποι με τους οποίους θα μπορούσε να ενταχθεί η ιστορία της Μύρτιδος στη σχολική εκπαίδευση. Η συνεργασία διεπιστημονικής ομάδας για την ανάπλαση του προσώπου αλλά και του τρόπου ζωής του εντεκάχρονου κοριτσιού, που έζησε στην αρχαία Αθήνα του 5ου π.Χ. αιώνα, επιτρέπει τη σύνδεση της ιστορίας της Μύρτιδος με διαφορετικά σχολικά μαθήματα του αναλυτικού προγράμματος. Επίσης, το γεγονός ότι η Μύρτις, ήταν ένα κορίτσι 11 χρονών, θύμα του λοιμού της Αθήνας, και όχι ήρωας πολέμου ή κάποιο σημαντικό πολιτικό πρόσωπο, βοηθάει τους μαθητές να εστιάσουν όχι μόνο στην πολεμική ιστορία αλλά και στην ιστορία της καθημερινής ζωής, των γυναικών, των παιδιών, της εκπαίδευσης, της διατροφής, των δούλων και των μετοίκων. Προσεγγίζοντας την ιστορία της Μύρτιδος όχι μόνο μέσω της παραδοσιακής διδασκαλίας, αλλά και μέσω τεχνικών θεάτρου, δράματος, εικαστικών τεχνών και δημιουργικής γραφής, σε συνδυασμό με τη χρήση ιστορικών πηγών, η Μύρτις μπορεί να ζωντανέψει εντός του ιστορικού της πλαισίου, δίνοντας μια βιωματική διάσταση στο μάθημα της Ιστορίας. Με αυτόν τον τρόπο προκαλείται το ενδιαφέρον των μαθητών, οι οποίοι αναπτύσσουν παράλληλα γνωστικές αλλά και κοινωνικο-συναισθηματικές δεξιότητες που σχετίζονται με το μάθημα της Ιστορίας, όπως ιστορική ενσυναίσθηση, διατύπωση ιστορικών ερωτήσεων αλλά και επεξεργασία ιστορικών τεκμηρίων. Οι μαθητές μπορούν να αντιλαμβάνονται πλέον το μάθημα της Ιστορίας, όχι μόνο ως ένα μάθημα ημερομηνιών και δύσκολων ονομάτων, αλλά ως ένα μάθημα που τους επιτρέπει να αντιληφθούν το παρελθόν, όχι ως κατώτερο, αλλά ως διαφορετικό, κατανοώντας παράλληλα τη σύγχρονη πολυπολιτισμική πραγματικότητα. Τέλος, η ιστορία της Μύρτιδος στη σχολική εκπαίδευση, μπορεί να ενταχθεί είτε στα πλαίσια της ευέλικτης ζώνης και του ολοήμερου προγράμματος, είτεστο σχολικό εγχειρίδιο, μέσω σκίτσων, διαλόγων και ασκήσεων.
description: Culture - Journal of Culture in Tourism, Art & Education, Vol 1, No 1 (2021): Culture
Functional Form Exploration: The Double Exponential Force Field
Creators: name: Horton, Joshua
name: Boothroyd, Simon
name: Behara, Pavan Kumar
name: Mobley, David
name: Cole, Daniel
Publisher: name: Zenodo
Year: 2023
Subjects: Force Field
Open source software
Molecular mechanics

description: The Lennard-Jones potential is the most widely-used function for the description of non-bonded interactions in transferable force fields for the condensed phase. This is not because it has an optimal functional form, but rather it is a legacy resulting from when computational expense was a major consideration and this potential was particularly convenient numerically. At present, it persists because the effort that would be required to re-write molecular modelling software and train new force fields has, until now, been prohibitive. Here, we present smirnoff-plugins as a flexible framework to extend the Open Force Field software stack to allow custom force field functional forms. We deploy smirnoff-plugins with the automated Open Force Field infrastructure to train a transferable, small molecule force field based on the recently-proposed double exponential functional form, on over 1000 experimental condensed phase properties. Extensive testing of the resulting force field shows improvements in transfer free energies, with acceptable conformational energetics, run times and convergence properties compared to state-of-the-art Lennard-Jones based force fields. Presentation given to the Open Force Field Advisory Board.
Quantum and classical telecommunication channel multiplexing
Creators: name: Lenhard, Andreas
name: Brito, José
name: Kucera, Stephan
name: Bock, Matthias
name: Eschner, Jürgen
name: Becher, Christoph
Publisher: name: arXiv
Year: 2015
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We demonstrate the multiplexing of a classical coherent and a quantum state of light in a single telecommunciation fiber. For this purpose we make use of spontaneous parametric down conversion and quantum frequency conversion to generate photon pairs at 854 nm and the telecom O-band. The herald photon triggers a telecom C-band laser pulse. The telecom single photon and the laser pulse are combined and coupled to a standard telecom fiber. Low background time correlation of the classical and quantum signal behind the fiber shows successful telecommunication channel multiplexing.
Μουσεία και άτομα με αισθητηριακές αναπηρίες: Πραγματικότητα, προκλήσεις και προοπτικές για ένα μουσείο για όλους
Creators: name: Κανάρη, Χαρίκλεια
name: Νικολαραΐζη, Μάγδα
name: Αργυρόπουλος, Βασίλης
name: Παπαζαφείρη, Μαρία
Publisher: name: Culture - Journal of Culture in Tourism, Art & Education
Year: 2023

description: Τα τελευταία χρόνια υπάρχει διεθνώς ένα αυξανόμενο ενδιαφέρον από την πλευρά των μουσείων για την πρόσβαση των ατόμων με αναπηρίες και τη δημιουργία ενός μουσείου για όλους που θα ανταποκρίνεται στον σύγχρονο κοινωνικό και εκπαιδευτικό του ρόλο. Παρά τα σημαντικά βήματα που έχουν γίνει προς αυτήν την κατεύθυνση, τα άτομα με αναπηρίες εξακολουθούν να αντιμετωπίζουν φραγμούς πρόσβασης στα μουσεία. Η παρούσα εργασία εστιάζει στα άτομα με αισθητηριακές αναπηρίες –άτομα με αναπηρία όρασης και κωφά/βαρήκοα άτομα– και στους τρόπους με τους οποίους τα μουσεία μπορούν να ανταποκριθούν στις ανάγκες, τα χαρακτηριστικά και τα ενδιαφέροντα των ατόμων αυτών που επισκέπτονται τα μουσεία είτε ως μεμονωμένοι επισκέπτες είτε στο πλαίσιο ομάδων ατόμων με και χωρίς αναπηρίες. Πιο συγκεκριμένα, παρουσιάζεται το παράδειγμα του Ευρωπαϊκού Προγράμματος Erasmus+ «ToMIMEUS: Towards a Multisensory and Inclusive Museum for Individuals with Sensory Disabilities». Δέκα εταίροι από πέντε διαφορετικές χώρες (Ρουμανία, Ελλάδα, Ουγγαρία, Τουρκία και Βοσνία-Ερζεγοβίνη) μοιράζονται τη γνώση και την εμπειρία τους για την επίτευξη των στόχων του Προγράμματος που είναι: α. η επιμόρφωση του προσωπικού των μουσείων για την ενίσχυση της πρόσβασης των ατόμων με αισθητηριακές αναπηρίες στα μουσεία με βάση σύγχρονα θεωρητικά μοντέλα, πρακτικές και νέες τεχνολογίες, β. η παροχή εκπαιδευτικών και κοινωνικών εμπειριών σε μουσεία για άτομα με αισθητηριακές αναπηρίες, γ. η προώθηση συνεργασιών μεταξύ διαφορετικών φορέων, και δ. η ανάδειξη καλών πρακτικών για την ενίσχυση της πρόσβασης και της συμπερίληψης ατόμων με αισθητηριακές αναπηρίες σε χώρους πολιτισμού, όπως τα μουσεία. Στην εργασία παρουσιάζονται οι βασικές δράσεις του Προγράμματος καθώς επίσης και τα πρώτα αποτελέσματα αναφορικά με τον σχεδιασμό επιμορφωτικού υλικού και σχετικών δράσεων για το προσωπικό των μουσείων. Τα αποτελέσματα του Προγράμματος αναμένεται να συμβάλλουν σημαντικά στην ενίσχυση της πρόσβασης των ατόμων με αισθητηριακές αναπηρίες σε μουσεία και στην προάσπιση του δικαιώματός τους για ισότιμη συμμετοχή στην κοινωνική και πολιτιστική ζωή.
description: Culture - Journal of Culture in Tourism, Art & Education, Vol 1, No 1 (2021): Culture
Design of photoactivatable inhibitors for spatiotemporal control of GEF activity
Creators: name: Lisanza, Sidney
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2018

description: Protein design methods have been applied to engineer novel protein folds, enzymes, and materials with atomic-level accuracy. However, little work has been done to apply it to engineer novel proteins that can be used in vivo to dissect biological processes. Here we utilize protein design to study the cellular signaling involved in cell motility. Cell motility is driven by the reorganization of the cytoskeleton, a process regulated by the Rho protein family of small GTPases. These molecules are activated at precise subcellular locations by guanine exchange factors (GEFs) with fine temporal control. Understanding the biological role of these molecules requires their investigation at the subcellular level in living cells. To this end, we developed photoactivatable GEF inhibitors to allow for the spatio-temporal control of these GTPases. The GEFs targeted in this work were GEF-H1 and the members of Vav family GEFs, specifically Vav2. The two serve orthogonal roles in cell motility, where GEF-H1 has GEF activity towards RhoA at the retracting edge, Vav targets Rac1 at the leading edge. Our computational work generated alibrary of GEF-H1 inhibitors, and two experimentally validated inhibitors for the Vav family displaying high specificity in silico.
Opacity of graphene independent of light frequency and polarization due to the topological charge of the Dirac points
Creators: name: de Sousa, Matheus S. M.
name: Chen, Wei
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The opacity of graphene is known to be approximately given by the fine-structure constant $α$ times $π$. We point out the fact that the opacity is roughly independent of the frequency and polarization of the light can be attributed to the topological charge of the Dirac points. As a result, one can literally see the topological charge by naked eyes from the opacity of graphene, and moreover it implies that the fine-structure constant is topologically protected. A similar analysis suggests that 3D topological insulator thin films of any thickness also have opacity $πα$ in the infrared region owing to the topological surface states, indicating that one can see the surface states by naked eyes through an infrared lens. For 3D Dirac or Weyl semimetals, the optical absorption power is linear to the frequency in the infrared region, with a linearity given by the fine-structure constant and the topological charge of Weyl points.
description: 9 pages, 3 figures
Quantitative evaluation of the effects of staffing models on pediatric critical care utilization and patient outcomes
Creators: name: Gigli, Kristin
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Patient Outcomes
subject: Pediatric Critical Care

description: This registration includes a PDF of the Statistical Analysis Plan to be used in analysis. The overall goal of this project is to evaluate the impact of provider staffing models that incorporate advanced practice providers on outcomes for children hospitalized in pediatric intensive care units using data from the AHRQ Healthcare Costs and Utilization Project
Scattering in $\cal PT$ and $\cal RT$ Symmetric Multimode Waveguides: Generalized Conservation Laws and Spontaneous Symmetry Breaking beyond One Dimension
Creators: name: Ge, Li
name: Makris, Konstantinos G.
name: Christodoulides, Demetrios N.
name: Feng, Liang
Publisher: name: arXiv
Year: 2015
Subjects: subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We extend the generalize conservation law of light propagating in a one-dimensional $\cal PT$-symmetric system, i.e., $|T-1|=\sqrt{R_LR_R}$ for the transmittance $T$ and the reflectance $R_{L,R}$ from the left and right, to a multimode waveguide with either $\cal PT$ or $\cal RT$ symmetry, in which higher dimensional investigations are necessary. These conservation laws exist not only in a matrix form for the transmission and reflection matrices; they also exist in a scalar form for real-valued quantities by defining generalized transmittance and reflectance. We then discuss, for the first time, how a multimode $\cal PT$-symmetric waveguide can be used to observe spontaneous symmetry breaking of the scattering matrix, which typically requires tuning the non-hermiticity of the system (i.e. the strength of gain and loss). Here the advantage of using a multimode waveguide is the elimination of tuning any system parameters: the transverse mode order $m$ plays the role of the symmetry breaking parameter, and one observes the symmetry breaking by simply performing scattering experiment in each waveguide channel at a single frequency and fixed strength of gain and loss.
description: 8 pages, 6 figures