cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Caledopsyche atalanta Schefter & Ward 2002
Creators: name: Oláh, J.
name: Johanson, K. A.
Publisher: name: Zenodo
Year: 2008
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Trichoptera
Hydropsychidae
Caledopsyche
Caledopsyche atalanta

description: Caledopsyche atalanta Schefter & Ward Caledopsyche atalanta Schefter & Ward, 2002: 23. Type locality. New Caledonia. New records: NEW CALEDONIA: Province Sud, Réserve spéciale de fauna de la haute Yaté, along road on southern part of Marais de la Riviére Blanche, stream draining to Marais de la Riviére Blanche, 2.25 km SW Pont Pérignon, 180 m, 5–18.x.2006, Malaise trap, loc 010b [K.A. Johanson & M. Espeland] - 8 males, 87 females (SMNH, in alcohol); Prov. Sud. stream crossing way to sanatorium 2.3 km E St. Laurent, ca. 150 m upstream bridge, 22 ° 04.484’S, 166 ° 19.910’E., loc 027, Malaise trap 17–19.x.2006 (K.A. Johanson & M. Espeland) - 6 males, 10 females (OPC, in alcohol); Province Sud, Monts Kwa Ne Mwa, on road between Noumea and Yaté, 2.0 km E Pic Mouirange, 22°12.356’S, 166°40.798’E, 220 m, 5–18.xi.2006, Malaise trap, loc 014b [K.A. Johanson & M. Espeland] - 2 males, 6 females (SMNH, alcohol); Province Sud, Réserve spéciale de fauna de la haute Yaté, along road on southern part of Marais de la Riviére Blanche, stream draining to Marais de la Riviére Blanche, 2.25 km SW Pont Pérignon, 180 m, 5–18.x.2006, Malaise trap, loc 010b [K.A. Johanson & M. Espeland] - 5 males, 39 females (SMNH, alcohol).
description: Published as part of Oláh, J. & Johanson, K. A., 2008, Generic review of Hydropsychinae, with description of Schmidopsyche, new genus, 3 new genus clusters, 8 new species groups, 4 new species clades, 12 new species clusters and 62 new species from the Oriental and Afrotropical regions (Trichoptera: Hydropsychidae), pp. 1-248 in Zootaxa 1802 on page 169
description: {"references": ["Schefter, P. W. & Ward, J. B. (2002) Revision of the New Caledonian endemic genus Caledopsyche (Trichoptera: Hydropsychidae: Hydropsychinae), with the description of five new species. Records of the Canterbury Museum, 16, 18 - 31."]}
Caledopsyche erotos Schefter & Ward 2002
Creators: name: Oláh, J.
name: Johanson, K. A.
Publisher: name: Zenodo
Year: 2008
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Trichoptera
Hydropsychidae
Caledopsyche
Caledopsyche erotos

description: Caledopsyche erotos Schefter & Ward Caledopsyche erotos Schefter & Ward, 2002: 20. Type locality. New Caledonia. New records: NEW CALEDONIA: Province Nord, 50 m upstream bridge on Hienghène-Tnèdo road, 3.9 km S summit of Mt. Tnèda, 2.2 km E Tnèdo, 20°43.085’S, 164°49.928’E, 29 m, 14.x.2006, light trap, loc 071b [K.A. Johanson & M. Espeland] - 160 females (SMNH, alcohol); Prov. Sud, Sarramea, stream Xwé Wya, ca 0.9 km NE Hotel Evasion 130, 21°38.081'S, 166°51.735'E, loc 131c, light trap 10.x.2006 [M. Espeland] - 11 males, 40 females (SMNH, in alcohol).
description: Published as part of Oláh, J. & Johanson, K. A., 2008, Generic review of Hydropsychinae, with description of Schmidopsyche, new genus, 3 new genus clusters, 8 new species groups, 4 new species clades, 12 new species clusters and 62 new species from the Oriental and Afrotropical regions (Trichoptera: Hydropsychidae), pp. 1-248 in Zootaxa 1802 on page 169
description: {"references": ["Schefter, P. W. & Ward, J. B. (2002) Revision of the New Caledonian endemic genus Caledopsyche (Trichoptera: Hydropsychidae: Hydropsychinae), with the description of five new species. Records of the Canterbury Museum, 16, 18 - 31."]}
Decentralized Hypothesis Testing in Energy Harvesting Wireless Sensor Networks
Creators: name: Tarighati, Alla
name: Gross, James
name: Jalden, Joakim
Publisher: name: arXiv
Year: 2016
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: We consider the problem of decentralized hypothesis testing in a network of energy harvesting sensors, where sensors make noisy observations of a phenomenon and send quantized information about the phenomenon towards a fusion center. The fusion center makes a decision about the present hypothesis using the aggregate received data during a time interval. We explicitly consider a scenario under which the messages are sent through parallel access channels towards the fusion center. To avoid limited lifetime issues, we assume each sensor is capable of harvesting all the energy it needs for the communication from the environment. Each sensor has an energy buffer (battery) to save its harvested energy for use in other time intervals. Our key contribution is to formulate the problem of decentralized detection in a sensor network with energy harvesting devices. Our analysis is based on a queuing-theoretic model for the battery and we propose a sensor decision design method by considering long term energy management at the sensors. We show how the performance of the system changes for different battery capacities. We then numerically show how our findings can be used in the design of sensor networks with energy harvesting sensors.
description: IEEE Transactions on Signal Processing
Smartphone Ability Scale
Creators: name: Howard, Phil
name: Babbage, Duncan
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: ability
subject: cognitive prosthetic
subject: functional tests
subject: mobile phone
subject: mobile technology
subject: psychometric tests
subject: smartphone
subject: touchscreen

description: A scale to measure how well a person can use a multi-touch smartphone, based on observation of a series of functional tasks.
Academic anxiety and performance scores in UK primary and secondary students
Creators: name: Carey, Emma
name: Devine, Amy
name: Hill, Francesca
name: Szűcs, Dénes
Publisher: name: Open Science Framework
Year: 2022

description: Primary (year 4) and secondary (year 7 and 8) UK school students' scores in math and reading standardised assessments, as well as scores in 3 anxiety forms (math anxiety, test anxiety and general anxiety). This project was funded by the Nuffield Foundation.
Low rank approximation and decomposition of large matrices using error correcting codes
Creators: name: Ubaru, Shashanka
name: Mazumdar, Arya
name: Saad, Yousef
Publisher: name: arXiv
Year: 2015
Subjects: subject: Information Theory (cs.IT)
subject: Machine Learning (cs.LG)
subject: Numerical Analysis (math.NA)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: Low rank approximation is an important tool used in many applications of signal processing and machine learning. Recently, randomized sketching algorithms were proposed to effectively construct low rank approximations and obtain approximate singular value decompositions of large matrices. Similar ideas were used to solve least squares regression problems. In this paper, we show how matrices from error correcting codes can be used to find such low rank approximations and matrix decompositions, and extend the framework to linear least squares regression problems. The benefits of using these code matrices are the following: (i) They are easy to generate and they reduce randomness significantly. (ii) Code matrices with mild properties satisfy the subspace embedding property, and have a better chance of preserving the geometry of an entire subspace of vectors. (iii) For parallel and distributed applications, code matrices have significant advantages over structured random matrices and Gaussian random matrices. (iv) Unlike Fourier or Hadamard transform matrices, which require sampling $O(k\log k)$ columns for a rank-$k$ approximation, the log factor is not necessary for certain types of code matrices. That is, $(1+ε)$ optimal Frobenius norm error can be achieved for a rank-$k$ approximation with $O(k/ε)$ samples. (v) Fast multiplication is possible with structured code matrices, so fast approximations can be achieved for general dense input matrices. (vi) For least squares regression problem $\min\|Ax-b\|_2$ where $A\in \mathbb{R}^{n\times d}$, the $(1+ε)$ relative error approximation can be achieved with $O(d/ε)$ samples, with high probability, when certain code matrices are used.
Empirical Essays on Bias-motivated Behaviour
Creators: name: Guha, Indulekha
Publisher: name: Purdue University Graduate School
Year: 2023
Subjects: Public economics - public choice
Labour economics

description: This dissertation is a collection of three papers. Each paper constitutes a chapter. Each chapter empirically examines an aspect of bias-motivated behavior in the United States. The first chapter studies the impact of penalty enhancement statutes by state legislatures on the incidence of hate crimes in the United States. Penalty enhancements may deter crime, however, the passing of such laws may also increase awareness among law enforcement officials and increase arrests. Using administrative data on hate crimes and a difference-in-differences method that leverages state-level variation in the introduction of legislation, this paper does not find a significant effect of the state enactment of penalty enhancement statutes on hate-crime incidence rates. The second chapter examines whether election timing and election outcomes affect the incidence of crimes motivated by hate and intolerance. Using administrative data and a difference-in-differences design that compares election with non-election years, I show that hate crimes increase by an average of 28 percent in the three weeks around a US presidential election. This effect is larger in recent presidential elections and when there is no incumbent candidate. Second, using a similar design and cross-state variation in the timing of gubernatorial elections, I find no evidence that these state-level elections affect hate-crime incidence. Third, using regression-discontinuity designs based on vote counts, I find that the number of hate crimes is not affected by presidential or gubernatorial election outcomes. The third chapter studies the impact of presidential and gubernatorial election timing on the level of toxicity present on social media platforms such as Twitter. Together with Sameer Borwankar, I empirically determine the extent to which the toxicity of Twitter content changes during election times as compared to non-election times. We randomly sample Twitter users and collect all tweets made by this sample around election time. We use a difference-in-differences identification leveraging election and non-election years. We further focus on toxic content that is motivated by political polarization and examine various bias-motivation categories that come up in this content as well as the variation in the intensity of toxicity between national and local election times.
Symmetries of Lorentzian Three-Manifolds with Recurrent Curvature
Creators: name: Calvaruso, Giovanni
name: Zaeim, Amirhesam
Publisher: name: arXiv
Year: 2016
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53C50, 53B30

description: Locally homogeneous Lorentzian three-manifolds with recurrect curvature are special examples of Walker manifolds, that is, they admit a parallel null vector field. We obtain a full classification of the symmetries of these spaces, with particular regard to symmetries related to their curvature: Ricci and matter collineations, curvature and Weyl collineations. Several results are given for the broader class of three-dimensional Walker manifolds.
Mass Independent Area (or Entropy) and Thermodynamic Volume Products in Conformal Gravity
Creators: name: Pradhan, Parthapratim
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this work we investigate the thermodynamic properties of conformal gravity in four dimensions. We compute the \emph{area(or entropy) functional} relation for this black hole. We consider both de-Sitter (dS) and anti de-Sitter (AdS) cases. We derive the \emph{Cosmic-Censorship-Inequality} which is an important relation in general relativity that relates the total mass of a spacetime to the area of all the black hole horizons. Local thermodynamic stability is studied by computing the specific heat. The second order phase transition occurs at a certain condition. Various type of second order phase structure has been given for various values of $a$ and the cosmological constant $Λ$ in the Appendix. When $a=0$, one obtains the result of Schwarzschild-dS and Schwarzschild-AdS cases. In the limit $aM<<1$, one obtains the result of Grumiller space-time. Where $a$ is non-trivial Rindler parameter or Rindler acceleration and $M$ is the mass parameter. The \emph{thermodynamic volume functional} relation is derived in the \emph{extended phase space}, where the cosmological constant treated as a thermodynamic pressure and its conjugate variable as a thermodynamic volume. The \emph{mass-independent} area (or entropy) functional relation and thermodynamic volume functional relation that we have derived could turn out to be a \emph{universal} quantity.
description: Accepted in MPLA
Cheumatopsyche infascia Martynov
Creators: name: Oláh, J.
name: Johanson, K. A.
Publisher: name: Zenodo
Year: 2008
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Trichoptera
Hydropsychidae
Cheumatopsyche
Cheumatopsyche infascia

description: Cheumatopsyche infascia Martynov Cheumatopsyche infascia Martynov, 1934: 283. Type locality. Russia (Amurland). New Record: CHINA: Shaanxi Province, Longxian, 1000 m, 34.9 ° N, 106.8 ° E, 16.vii.1992 [Sun Changhai] - 1 male, 1 female (NMNH); Szechuan, Kwanshien, Mt Jung-Del-Fu, 5200’, 29.vii.1938 [D.C. Graham] - 1 male, (NMNH).
description: Published as part of Oláh, J. & Johanson, K. A., 2008, Generic review of Hydropsychinae, with description of Schmidopsyche, new genus, 3 new genus clusters, 8 new species groups, 4 new species clades, 12 new species clusters and 62 new species from the Oriental and Afrotropical regions (Trichoptera: Hydropsychidae), pp. 1-248 in Zootaxa 1802 on page 181
description: {"references": ["Martynov, A. B. (1934) Trichoptera Annulipalpia. Tableaux analytiques de la Faune de l'URSS. L'Institut Zoologique de l'Academie des Science 13, 343 pp."]}
Zero cycles with modulus and zero cycles on singular varieties
Creators: name: Binda, Federico
name: Krishna, Amalendu
Publisher: name: arXiv
Year: 2015
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: Primary 14C25, Secondary 14F30, 13F35, 19E15

description: Given a smooth variety $X$ and an effective Cartier divisor $D \subset X$, we show that the cohomological Chow group of 0-cycles on the double of $X$ along $D$ has a canonical decomposition in terms of the Chow group of 0-cycles ${\rm CH}_0(X)$ and the Chow group of 0-cycles with modulus ${\rm CH}_0(X|D)$ on $X$. When $X$ is projective, we construct an Albanese variety with modulus and show that this is the universal regular quotient of ${\rm CH}_0(X|D)$. As a consequence of the above decomposition, we prove the Roitman torsion theorem for the 0-cycles with modulus. We show that ${\rm CH}_0(X|D)$ is torsion-free and there is an injective cycle class map ${\rm CH}_0(X|D) \hookrightarrow K_0(X,D)$ if $X$ is affine. For a smooth affine surface $X$, this is strengthened to show that $K_0(X,D)$ is an extension of ${\rm CH}_1(X|D)$ by ${\rm CH}_0(X|D)$.
description: 62 pages. Final version to appear in Compositio Math
Double power series method for approximating cosmological perturbations
Creators: name: Wren, Andrew J.
name: Malik, Karim A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We introduce a double power series method for finding approximate analytical solutions for systems of differential equations commonly found in cosmological perturbation theory. The method was set out, in a non-cosmological context, by Feshchenko, Shkil' and Nikolenko (FSN) in 1966, and is applicable to cases where perturbations are on sub-horizon scales. The FSN method is essentially an extension of the well known Wentzel-Kramers-Brillouin (WKB) method for finding approximate analytical solutions for ordinary differential equations. The FSN method we use is applicable well beyond perturbation theory to solve systems of ordinary differential equations, linear in the derivatives, that also depend on a small parameter, which here we take to be related to the inverse wave-number. We use the FSN method to find new approximate oscillating solutions in linear order cosmological perturbation theory for a flat radiation-matter universe. Together with this model's well known growing and decaying Mészáros solutions, these oscillating modes provide a complete set of sub-horizon approximations for the metric potential, radiation and matter perturbations. Comparison with numerical solutions of the perturbation equations shows that our approximations can be made accurate to within a typical error of 1%, or better. We also set out a heuristic method for error estimation. A Mathematica notebook which implements the double power series method is made available online.
description: 22 pages, 10 figures, 2 tables. Mathematica notebook available from Github at https://github.com/AndrewWren/Double-power-series.git
Models of LHC Diphoton Excesses Valid up to the Planck scale
Creators: name: Hamada, Yuta
name: Kawai, Hikaru
name: Kawana, Kiyoharu
name: Tsumura, Koji
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We discuss a possibility to explain the LHC diphoton excesses at $750$GeV by the new scalar $X$ that couples to the gauge bosons through the loop of new massive particles with Standard Model charges. We assume that the new particles decay into the Standard Model particles at the tree level. We systematically examine the models that preserve the vacuum stability and the perturbativity up to the Planck scale. When we take scalars for the new particles, we find that only a few diquark and dilepton models can explain the observed diphoton cross section without conflicting the experimental mass bounds. When we take vector-like fermions for the new particles, we find rather different situations depending on whether their couplings to $X$ are scalar or pseudoscalar type. In the former case, a few models are allowed if we introduce only one species of fermions. The more fermions we introduce, the more models are allowed. In the later case, the most of the models are allowed because of the large coupling between $X$ and photon. It is interesting that the allowed mass regions of the scalar particles might be reached by the next lepton colliders.
description: 35 pages, 4 figures; the maximum values of $\sigma_{\gamma\gamma}$ for the scalar extensions are recalculated, typos corrected, references added (v2); references added, typos corrected, version to appear in PRD (v3)
Forests for the Future: How Can Trees Offset Carbon Emissions?
Creators: name: Syring, Laura
name: Gough, Christopher
Publisher: name: QUBES Educational Resources
Year: 2023

description: This activity explores the chemistry and biology underlying forest carbon sequestration, a process that removes carbon from the atmosphere via photosynthesis and storage in plant tissues and soils. Students calculate their entire carbon footprint or just one component that is relevant to their personal lives (transportation, heating/cooling, food, clothing, etc.) and then use the data provided in the “forest flux” sheet to calculate the area of that type of forest that needs to grow in order to offset those carbon emissions for the footprint calculator.
Effect of Jitter on the Settling Time of Mesochronous Clock Retiming Circuits
Creators: name: Kadayinti, Naveen
name: Budkuley, Amitalok J.
name: Baghini, Maryam S.
name: Sharma, Dinesh K.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Emerging Technologies (cs.ET)
subject: FOS: Computer and information sciences

description: It is well known that timing jitter can degrade the bit error rate (BER) of receivers that recover the clock from input data. However, timing jitter can also result in an indefinite increase in the settling time of clock recovery circuits, particularly in low swing mesochronous systems. Mesochronous clock retiming circuits are required in repeaterless low swing on-chip interconnects. We first discuss how timing jitter can result in a large increase in the settling time of the clock recovery circuit. Next, the circuit is modelled as a Markov chain with absorbing states. The mean time to absorption of the Markov chain, which represents the mean settling time of the circuit, is determined. The model is validated through behavioural simulations of the circuit, the results of which match well with the model predictions. We consider circuits with (i) data dependent jitter, (ii) random jitter, and (iii) combination of both of them. We show that a mismatch between the strengths of up and down corrections of the retiming can reduce the settling time. In particular, a 10% mismatch can reduce the mean settling time by up to 40%. We leverage this fact toward improving the settling time performance, and propose useful techniques based on biased training sequences and mismatched charge pumps. We also present a coarse+fine clock retiming circuit, which can operate in coarse first mode, to reduce the settling time substantially. These fast settling retiming circuits are verified with circuit simulations.
description: 23 pages, 40 figures
Tuning the pn junction at a metal-graphene interface via H2 exposure
Creators: name: Cadore, Alisson R.
name: Mania, Edrian
name: Morais, Evandro A.
name: Watanabe, Kenji
name: Taniguchi, Takashi
name: Lacerda, Rodrigo G.
name: Campos, Leonardo C.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Combining experiment and theory, we investigate how the naturally created heterojunction at a graphene and metallic contact is modulated via interaction with molecular hydrogen (H2). Due to electrostatic interaction, a Cr/Au electrode induces a pn junction in graphene, leading to an asymmetrical resistance between the charge carriers (electron and hole). This asymmetry is well modeled by considering the preferential charge scattering at the pn junction, and we show that it can be modulated in a reversible, selective and asymmetrical manner by exposing H2 to the metal-graphene interface. Our results are valuable for understanding the nature of the metal-graphene interfaces and demonstrate a novel route towards hydrogen sensor application. KEYWORDS: graphene, contact resistance,
Topics in dynamic factor model for high dimensional time series
Creators: name: Yu, Ruofan
Publisher: name: No Publisher Supplied
Year: 2023

description: The evolution and expansion of data generation and collection capabilities have opened new vistas in the realms of statistics. High-dimensional time series are becoming increasingly complex and structured, and are usually observed in matrix forms. The employment of matrix time series representation not only preserves but also illuminates the interrelationships between rows and columns, thus engendering a holistic comprehension of the data. The ability of such data to portray complex structures allows for more granular and sophisticated analyses. We propose the dynamic matrix factor model, which is specifically designed to handle high-dimensional matrix-valued time series data. The model employs a two-component process. The first component involves the application of a matrix factor model, tasked with reducing the dimensionality of the high-dimensional time series. The second component involves the application of a secondary model to encapsulate the dynamics of the now low-dimensional latent factor series, specifically the Matrix Autoregressive Model. We address the model setting, estimation, theoretical properties, and its applications across various fields. To enhance the versatility of the dynamic matrix factor model, we further extend its capabilities by incorporating a Markov-switching structure within the secondary model. This enhances the model's flexibility by allowing it to capture non-linear dynamics and structural shifts. Consequently, the model can effectively represent sudden and dramatic changes in the data, and project future fluctuations. The applications of such models are vast, spanning fields from finance to social studies. To make our methodologies widely accessible and to facilitate the practical applications of matrix and tensor-valued time series models, we have developed an R package called tensorTS, which encapsulates our advanced modeling techniques for matrix and tensor-valued time series. We provide a step-by-step guide to the estimation procedures included in the package. Moreover, we illustrate the application of these procedures using real-world examples.
Pediatric Obstructive Sleep Apnea: Proposed Abbreviated Screening Questionnaire
Creators: name: Quevedo, Gabriella K
Publisher: name: University of Illinois at Chicago
Year: 2023

description: Objective: The aim was to determine the predictive utility of a proposed 5-item Pediatric Obstructive Sleep Apnea (POSA) screening questionnaire in establishing appropriate referrals and possible Obstructive Sleep Apnea (OSA) diagnosis. Hypothesis: H0: Positive answers to UIC abbreviated screening questionnaire are associated with appropriate referrals leading to OSA diagnosis. H1: There is no significant correlation between positive answers to UIC abbreviated screening questionnaire and OSA diagnosis from referrals. Methods: In this retrospective cohort study, we abstracted data from the electronic health records for children seen at UIC Pediatric Dentistry Clinic. The study included patients ages 0 months – 12 years who were seen during 09/02/2020 – 05/20/2022 and had a completed Pediatrics Exam form. Data included information from the OSA questionnaire, medical alerts, medical history form, chart notes, consultations and demographic information. Data analysis included bivariate analysis and Mantel-Haenszel chi-squared test. Based on bivariate analysis, we created an OSA Index and measured its sensitivity and specificity for predicting OSA diagnosis, using weighted based on bivariate strength of association. Results: A positive (yes) answer to any item in the OSA questionnaire was significantly associated with referrals for OSA evaluation. Individuals who answered positively on snoring ≥2 times/ week, trouble breathing, stop breathing, or mouth breathing during sleep were significantly more likely to be diagnosed with OSA. Sleepiness during the day was not significantly associated with OSA diagnosis. An overall score of ≥3 had sensitivity of 68.2% and specificity of 94.0%. Conclusions: Our screening questionnaire is effective in identifying youth at high risk for OSA. When used with our proposed weighting scale, this questionnaire shows moderate-to-high sensitivity and specificity, as well as was validated in a large sample population. Implementation of this questionnaire would encourage large scale screening and pertinent referrals in a busy clinical setting.
Evaluation neuer radiologischer Bildgebungstechniken in der otologischen Diagnostik
Creators: name: Klingebiel, Randolf
Publisher: name: Humboldt-Universität zu Berlin, Medizinische Fakultät - Universitätsklinikum Charité
Year: 2002
Subjects: subject: MRT
subject: Mittelohr
subject: Innenohr
subject: CT
subject: MRI
subject: middle ear
subject: inner ear
subject: 610 Medizin
subject: 33 Medizin
subject: XH 2900

description: Die Optimierung der Akquisitionstechniken führte zu einer verbesserten Abgrenzbarkeit klinisch relevanter Bilddetails und war gleichzeitig Voraussetzung für die Erzeugung bildqualitativ hochwertiger dreidimensionaler Bildrekonstruktionen. Die Kombination aus hochauflösenden Akquisitionstechniken und der dreidimensionalen Visualisierung mittels Volume Rendering ermöglichte die nicht-invasive endoluminale Darstellung im Sinne einer virtuellen Oto- bzw. Neuroendoskopie. Trotz weitgehender Übereinstimmung zwischen der realen und virtuell dargestellten Pathomorphologie ossikulärer Strukturen in der Mittelohr-Bildgebung zeigten sich methodische Limitationen in der Erfassung der Pathophysiologie. Die 3D-Bildgebung des Innenohrs gewährleistete eine detaillierte Darstellung pathoanatomisch komplexer Veränderungen und erlaubte dadurch Rückschlüsse auf die Pathogenese. Insbesondere in der Bildgebung des Mittelohrs und Kleinhirn-Brückenwinkels erwiesen sich die virtuell-endoskopischen Ansichten als komplementäre Darstellungstechniken, deren Ergebnisse im Zusammenhang mit den primären Schnittbilddaten und den klinischen Untersuchungsergebnissen zu interpretieren sind. Prospektiv ist aufgrund neuer Gerätetechnologien in der Bilddaten-Erfassung (z.B. 16-Schicht-Spiral-CT) sowie höheren Rechnerleistungen in der Daten-Nachverarbeitung von einer zunehmenden Verbreitung dreidimensionaler Bildgebungstechniken auszugehen.
description: Optimized data acquisition resulted in an improved delineation of critical image elements and was a prerequisite for generating 3D reconstructions of high image quality. Combining high-resolution data acquisition and 3D visualization by means of volume rendering allowed for the noninvasive endoluminal assessment known as virtual oto- and neuroendoscopy. Despite a high degree of agreement between the intraoperatively verified ossicular pathomorphology and that visualized by virtual otoscopy in middle ear imaging methodological limitations were encountered with respect to pathophysiological evaluation. 3D imaging provided detailed views of even complex pathoanatomical conditions, thus permitting conclusions regarding the underlying pathogenesis. As far as imaging of the middle ear and cerebellopontine angle was concerned, virtual endoscopic views proved to be complementary visualization techniques whose results have to be interpreted in the context of the primary cross-sectional data and clinical findings. Prospectively, a more widespread use of 3D imaging techniques may be expected from upcoming acquisition technologies (for example 16-slice helical CT) as well as from more powerful computers with improved image data postprocessing capacities.
A Study of How Young Chinese Immigrants Search for Online Sexually Transmitted Infections (STIs) Prevention Information
Creators: name: Dong, Yue
name: Gao, Haijuan
name: Branscum, Paul
Publisher: name: Open Science Framework
Year: 2022

description: Datasets for manuscipt "A Study of How Young Chinese Immigrants Search for Online Sexually Transmitted Infections (STIs) Prevention Information"
Non-equilibrium itinerant-electron magnetism: a time-dependent mean-field theory
Creators: name: Secchi, Andrea
name: Lichtenstein, Alexander I.
name: Katsnelson, Mikhail I.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the dynamical magnetic susceptibility of a strongly correlated electronic system in the presence of a time-dependent hopping field, deriving a generalized Bethe-Salpeter equation which is valid also out of equilibrium. Focusing on the single-orbital Hubbard model within the time-dependent Hartree-Fock approximation, we solve the equation in the non-equilibrium adiabatic regime, obtaining a closed expression for the transverse magnetic susceptibility. From this, we provide a rigorous definition of non-equilibrium (time-dependent) magnon frequencies and exchange parameters, expressed in terms of non-equilibrium single-electron Green functions and self-energies. In the particular case of equilibrium, we recover previously known results.
description: Revised version
Cross-validation estimate of the number of clusters in a network
Creators: name: Kawamoto, Tatsuro
name: Kabashima, Yoshiyuki
Publisher: name: arXiv
Year: 2016
Subjects: subject: Social and Information Networks (cs.SI)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Network science investigates methodologies that summarise relational data to obtain better interpretability. Identifying modular structures is a fundamental task, and assessment of the coarse-grain level is its crucial step. Here, we propose principled, scalable, and widely applicable assessment criteria to determine the number of clusters in modular networks based on the leave-one-out cross-validation estimate of the edge prediction error.
description: 19 pages, 9 figures
Blind Deconvolution Meets Blind Demixing: Algorithms and Performance Bounds
Creators: name: Ling, Shuyang
name: Strohmer, Thomas
Publisher: name: arXiv
Year: 2015
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: Suppose that we have $r$ sensors and each one intends to send a function $\boldsymbol{g}_i$ (e.g.\ a signal or an image) to a receiver common to all $r$ sensors. During transmission, each $\boldsymbol{g}_i$ gets convolved with a function $\boldsymbol{f}_i$. The receiver records the function $\boldsymbol{y}$, given by the sum of all these convolved signals. When and under which conditions is it possible to recover the individual signals $\boldsymbol{g}_i$ and the blurring functions $\boldsymbol{f}_i$ from just one received signal $\boldsymbol{y}$? This challenging problem, which intertwines blind deconvolution with blind demixing, appears in a variety of applications, such as audio processing, image processing, neuroscience, spectroscopy, and astronomy. It is also expected to play a central role in connection with the future Internet-of-Things. We will prove that under reasonable and practical assumptions, it is possible to solve this otherwise highly ill-posed problem and recover the $r$ transmitted functions $\boldsymbol{g}_i$ and the impulse responses $\boldsymbol{f}_i$ in a robust, reliable, and efficient manner from just one single received function $\boldsymbol{y}$ by solving a semidefinite program. We derive explicit bounds on the number of measurements needed for successful recovery and prove that our method is robust in the presence of noise. Our theory is actually sub-optimal, since numerical experiments demonstrate that, quite remarkably, recovery is still possible if the number of measurements is close to the number of degrees of freedom.
Untersuchung von intrazellulären Osmolytkonzentrationen im Hirn nach Dehydratation durch Ausdauerbelastung
Creators: name: Bolliger, Marc
Publisher: name: Humboldt-Universität zu Berlin, Philosophische Fakultät IV
Year: 2005
Subjects: subject: Protonen-MR-Spektroskopie
subject: Dehydratation
subject: Osmolyte
subject: Hirn
subject: proton NMR spectroscopy
subject: brain
subject: dehydration
subject: osmolytes
subject: 610 Medizin
subject: 33 Medizin
subject: XE 5404
subject: YG 4404
subject: YG 4421
subject: YG 5104
subject: YG 5121

description: Einleitung: Mit der vorliegenden Studie wurden zum ersten Mal beim Menschen die Auswirkungen von Dehydration (Dehy) und anschließender Rehydratation (Rehy) auf cerebrale volumenregulatorische Metabolite (myo-Inosit (mI), N-Azetylaspartat+N-Azetylaspartylglutamat (tNAA), Kreatin (Cr), Glyzerophosphocholin+Phosphocholin (Cho) und Glutamat+Glutamin (Glx)) sowie auf Flüssigkeitsverschiebungen untersucht. Methoden: 14 Radsportler (26.6 (22.7/29.8) Jahre, Median und 25./75. Perzentile) wurden mittels 1H-Spektroskopie (1H-MRS) in der okzipitoparietalen grauen Substanz (GM) und parietalen weißen Substanz rechts (WMR) und links (WML) untersucht (GE Signa Horizon 3T94; PRESS: TE 30ms, TR 6000ms, VOI 8ml). Die Messungen erfolgten vor, direkt nach Dehy und nach Rehy (180min, Zufuhr von 150\% der verlorenen Körpermasse (KM)). Zusätzlich wurde durch T2-Relaxationsmessungen der Atrophieindex alpha (Verhältnis cerebrales Gewebewasser (HW) zu Liquor (CSF)) bestimmt. Resultate: Die KM der Probanden reduzierte sich durch Dehy um 3.7 (3.4/4.1)% und stieg durch Rehy wieder um 4.5 (3.7/5.3)% an (Wilcoxon: p
description: Introduction: In the present study the influence of Dehy on cerebral volume regulatory metabolites (myo-Inositol (mI), N-Acetyl-aspartata+N-Acetyl-aspartyl-glutamate (tNAA), Creatine (Cr), Glycerophosphocholine+Phosphocholine (Cho) and Glutamate+Glutamine (Glx)) and fluid shifts has been investigated for the first time in humans. Methods: 14 cyclists (26.6 (22.7/29.8) y, median and 25./75. percentile) have been examined with proton NMR spectroscopy in the occipito-parietal gray matter (GM) and the right (WMR) and left (WML) parietal with matter (GE Signa Horizon 3T94; PRESS: TE 30ms, TR 6000ms, VOI 8ml). Spectra were acquired before, immediately after Dehy and after rehydration (Rehy). Rehy took place during 180min and 150% of lost body weight (BW) was substituted. Additionally the atrophy index alpha (ratio between cerebral water and liquor) was assessed (T2 signal decay as a function of echo time). Results: BW of volunteers has been decreased 3.7 (3.4/4.1)% after Dehy and increased 4.5 (3.7/5.3)% after Rehy (Wilcoxon: p
Optimal dictionary for least squares representation
Creators: name: Sheriff, Mohammed Rayyan
name: Chatterjee, Debasish
Publisher: name: arXiv
Year: 2016
Subjects: subject: Machine Learning (cs.LG)
subject: Optimization and Control (math.OC)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: Dictionaries are collections of vectors used for representations of random vectors in Euclidean spaces. Recent research on optimal dictionaries is focused on constructing dictionaries that offer sparse representations, i.e., $\ell_0$-optimal representations. Here we consider the problem of finding optimal dictionaries with which representations of samples of a random vector are optimal in an $\ell_2$-sense: optimality of representation is defined as attaining the minimal average $\ell_2$-norm of the coefficients used to represent the random vector. With the help of recent results on rank-$1$ decompositions of symmetric positive semidefinite matrices, we provide an explicit description of $\ell_2$-optimal dictionaries as well as their algorithmic constructions in polynomial time.
description: 24 pages
Development of Gold Tiny Particles and Particles in Different Sizes at Varying Precursor Concentration
Creators: name: Ali, Mubarak
name: Lin, I-Nan
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Coalescence (or Growth) of tiny particles to larger particles has been an exciting and practical research topic in nanotechnology. This study deals with development of gold particles at varying precursor concentration in a custom-built setup. Under the tuned ratio of bipolar pulse OFF to ON time, tiny particles of different sizes and shapes develop depending on the amount of gold precursor. When compact monolayer assembly is formed on solution surface, nano energy in packet shapes bind gold atoms in own shape. Between 0.07 mM to 0.90 mM precursor concentration, tiny particles develop in both triangular and non-triangular shapes. Tiny particles of triangular shape develop in a large number at precursor concentration 0.30 mM and 0.60 mM. Hence, nanoparticles and particles also developed in different geometrical shapes. Such tiny particles pack due to the exerted force in immersing format, where made structures of smooth elements assemble to develop nanoparticles and particles of different shapes. Tiny particles of non-geometrical shapes do not assemble at a common point and their assembling develops a nanoparticle or particle of distorted or spherical shape. This occurs mainly when precursor concentration is 0.05 mM and 1.20 mM. At 50 sccm Argon flow rate, nanoparticles and particles develop in the same shapes as in case of 100 sccm. For different precursor concentrations, different colors of solutions indicate different features of nanoparticles and particles. This study clarifies the necessary concentration of precursor to develop colloids of different sizes.
Defenses against predation: Interpreting graphs of predator behavior
Creators: name: Schafer, Jennifer
name: Strickland, Lynette
Publisher: name: QUBES Educational Resources
Year: 2023

description: In this lesson, students discuss anti-predator defense mechanisms and the types of cues defenses provide to predators. Students then interpret graphs of behavior of arthropod predators when presented with different phenotypes of color polymorphic tortoise beetles. Finally, students view and reflect on an interview with Dr. Lynette Strickland, the biologist who collected the data that they interpreted.
Robust Transmission in Downlink Multiuser MISO Systems: A Rate-Splitting Approach
Creators: name: Joudeh, Hamdi
name: Clerckx, Bruno
Publisher: name: arXiv
Year: 2016
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: We consider a downlink multiuser MISO system with bounded errors in the Channel State Information at the Transmitter (CSIT). We first look at the robust design problem of achieving max-min fairness amongst users (in the worst-case sense). Contrary to the conventional approach adopted in literature, we propose a rather unorthodox design based on a Rate-Splitting (RS) strategy. Each user's message is split into two parts, a common part and a private part. All common parts are packed into one super common message encoded using a public codebook, while private parts are independently encoded. The resulting symbol streams are linearly precoded and simultaneously transmitted, and each receiver retrieves its intended message by decoding both the common stream and its corresponding private stream. For CSIT uncertainty regions that scale with SNR (e.g. by scaling the number of feedback bits), we prove that a RS-based design achieves higher max-min (symmetric) Degrees of Freedom (DoF) compared to conventional designs (NoRS). For the special case of non-scaling CSIT (e.g. fixed number of feedback bits), and contrary to NoRS, RS can achieve a non-saturating max-min rate. We propose a robust algorithm based on the cutting-set method coupled with the Weighted Minimum Mean Square Error (WMMSE) approach, and we demonstrate its performance gains over state-of-the art designs. Finally, we extend the RS strategy to address the Quality of Service (QoS) constrained power minimization problem, and we demonstrate significant gains over NoRS-based designs.
description: Accepted for publication in IEEE Transactions on Signal Processing
SKELETAL MUSCLE MICROVASCULAR (DYS)FUNCTION: MECHANISMS AND THERAPEUTICS
Creators: name: Belbis, Michael David
Publisher: name: Purdue University Graduate School
Year: 2023
Subjects: Exercise physiology

description: Oxygen (O2) plays a crucial role in the energy metabolism of complex multicellular life on earth. Due to the small and finite energy stores in the body, fine-tuned changes within the body are required to meet metabolic demand during skeletal muscle contractions, such as during exercise and activities of daily living. The skeletal muscle microcirculation is one of the last steps in the O2 transport pathway from the lungs to muscle cells and represents the largest surface area for O2 and substrate exchange. When skeletal muscle O2 uptake increases during contractions to meet metabolic demand, there must be an increase in muscle O2 delivery. To achieve these elevations in O2 delivery, vessel (arteriole) diameter in the microcirculation is increased, known as vasodilation. This process in the skeletal muscle microcirculation is regulated by several factors, such as neurohumoral, mechanical, endothelial, paracrine, and metabolic influences, which are imperative in properly regulating O2 delivery at rest and during muscular contractions. Two vasodilatory pathways of interest in this dissertation are the cyclooxygenase (COX) and nitric oxide (NO) vasodilatory pathways. The primary aim of my dissertation studies was to determine the mechanisms that modulate skeletal muscle oxygenation in health and to define the impact of a potentially effective intervention, whole-body chronic heat therapy (HT), to treat heart failure with preserved ejection fraction (HFpEF). In Chapter 2, we report that acute selective COX-2 inhibition had no effect on resting or exercising skeletal muscle microvascular oxygenation, pulmonary oxygen uptake, or exercise tolerance in healthy young humans. In Chapter 3, we report that NO, via phosphodiesterase type 5 inhibition, regulates myocyte O2 transport at rest and during recovery from muscle contractions in healthy young rats. In Chapter 4, we show that whole-body chronic HT promotes central and peripheral adaptations, which impact positively exercise tolerance in a pre-clinical rat model of HFpEF. Specifically, whole-body chronic HT had beneficial influences on exercise tolerance, skeletal muscle oxygenation from rest to contractions (driven, at least in part, by enhanced NO bioavailability), body composition, and cardiac function. Chapter 5 is a summary of the results and limitations of the projects presented in Chapters 2-4, with a brief discussion of potential future research directions.
Kernel Distribution Embeddings: Universal Kernels, Characteristic Kernels and Kernel Metrics on Distributions
Creators: name: Simon-Gabriel, Carl-Johann
name: Schölkopf, Bernhard
Publisher: name: arXiv
Year: 2016
Subjects: subject: Machine Learning (stat.ML)
subject: Functional Analysis (math.FA)
subject: Probability (math.PR)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics
subject: G.3

description: Kernel mean embeddings have recently attracted the attention of the machine learning community. They map measures $μ$ from some set $M$ to functions in a reproducing kernel Hilbert space (RKHS) with kernel $k$. The RKHS distance of two mapped measures is a semi-metric $d_k$ over $M$. We study three questions. (I) For a given kernel, what sets $M$ can be embedded? (II) When is the embedding injective over $M$ (in which case $d_k$ is a metric)? (III) How does the $d_k$-induced topology compare to other topologies on $M$? The existing machine learning literature has addressed these questions in cases where $M$ is (a subset of) the finite regular Borel measures. We unify, improve and generalise those results. Our approach naturally leads to continuous and possibly even injective embeddings of (Schwartz-) distributions, i.e., generalised measures, but the reader is free to focus on measures only. In particular, we systemise and extend various (partly known) equivalences between different notions of universal, characteristic and strictly positive definite kernels, and show that on an underlying locally compact Hausdorff space, $d_k$ metrises the weak convergence of probability measures if and only if $k$ is continuous and characteristic.
description: Old and longer version of the JMLR paper with same title (published 2018). Please start with the JMLR version. 55 pages (33 pages main text, 22 pages appendix), 2 tables, 1 figure (in appendix)