cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Machine learning and deep learning
Creators: name: Janiesch, Christian
name: Zschech, Patrick
name: Heinrich, Kai
Publisher: name: arXiv
Year: 2021
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Today, intelligent systems that offer artificial intelligence capabilities often rely on machine learning. Machine learning describes the capacity of systems to learn from problem-specific training data to automate the process of analytical model building and solve associated tasks. Deep learning is a machine learning concept based on artificial neural networks. For many applications, deep learning models outperform shallow machine learning models and traditional data analysis approaches. In this article, we summarize the fundamentals of machine learning and deep learning to generate a broader understanding of the methodical underpinning of current intelligent systems. In particular, we provide a conceptual distinction between relevant terms and concepts, explain the process of automated analytical model building through machine learning and deep learning, and discuss the challenges that arise when implementing such intelligent systems in the field of electronic markets and networked business. These naturally go beyond technological aspects and highlight issues in human-machine interaction and artificial intelligence servitization.
description: Published online first in Electronic Markets
The complete LQG propagator: I. Difficulties with the Barrett-Crane vertex
Creators: name: Alesci, Emanuele
name: Rovelli, Carlo
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Some components of the graviton two-point function have been recently computed in the context of loop quantum gravity, using the spinfoam Barrett-Crane vertex. We complete the calculation of the remaining components. We find that, under our assumptions, the Barrett-Crane vertex does not yield the correct long distance limit. We argue that the problem is general and can be traced to the intertwiner-independence of the Barrett-Crane vertex, and therefore to the well-known mismatch between the Barrett-Crane formalism and the standard canonical spin networks. In a companion paper we illustrate the asymptotic behavior of a vertex amplitude that can correct this difficulty.
description: 31 pages
CORROSIONE DI ARMATURE IN ACCIAIO E ACCIAIO ZINCATO SU STRUTTURE IN CALCESTRUZZO ARMATO RINFORZATE CON FRP
Creators: name: Montuori, Mario
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2008

description: La valutazione della durabilità e la prevenzione della corrosione delle armature di strutture in calcestruzzo rappresentano, al giorno d’oggi, un argomento critico nello studio di manufatti in calcestruzzo armato. I costi elevati relativi alla manutenzione e al recupero di strutture danneggiate hanno condotto alla consapevolezza che la corrosione delle barre deve essere prevenuta al fine di incrementare la vita utile di un manufatto. Nel presente lavoro si sono studiati i fenomeni di degrado di provini di calcestruzzo armato in presenza di cloruri e di anidride carbonica, in condizioni di libera esposizione e mediante prove di corrosione accelerata, valutando l’influenza derivante dall’applicazione di fibre di carbonio e di vetro sulla superficie esterna di provini cilindrici appena confezionati. E' stato, altresì, valutato il contributo alla riduzione della velocità di corrosione di provini rivestiti con fibre di carbonio e vetro in una fase intermedia del processo di degradazione.
Mechanical Response of Mesoporous Amorphous NiTi Alloy to External Deformations
Creators: name: Galimzyanov, Bulat N.
name: Mokshin, Anatolii V.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The porous titanium nickelide is very popular in various industries due to unique combination of physical and mechanical properties such as shape memory effect, high corrosion resistance, and biocompatibility. The non-equilibrium molecular dynamics simulation was applied to study the influence of porosity degree on mechanical properties of porous amorphous titanium nickelide at uniaxial tension, uniaxial compression, and uniform shear. We have found that the porous amorphous alloy is characterized by a relatively large value of Young's modulus in comparison to its crystalline analogue. It has been found that the system with a percolated network of pores exhibits improved elastic characteristics associated with resistance to tensile and shear. The system contained isolated spherical pores is more resistant to compression and less resistant to tensile and shear. These results can be applied to develop and improve the methods for making amorphous metal foams.
description: 23 pages, 7 figures, 2 tables
37 New Validated Planets in Overlapping K2 Campaigns
Creators: name: de Leon, J. P.
name: Livingston, J.
name: Endl, M.
name: Cochran, W. D.
name: Hirano, T.
name: Garcia, R. A.
name: Mathur, S.
name: Lam, K. W. F.
name: Korth, J.
name: Trani, A. A.
name: Dai, F.
name: Alonso, E. Diez
name: Castro-Gonzalez, A.
name: Fridlund, M.
name: Fukui, A.
name: Gandolfi, D.
name: Kabath, P.
name: Kuzuhara, M.
name: Luque, R.
name: Savel, A. B.
name: Gill, H.
name: Dressing, C.
name: Giacalone, S.
name: Narita, N.
name: Palle, E.
name: Van Eylen, V.
name: Tamura, M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We analysed 68 candidate planetary systems first identified during Campaigns 5 and 6 (C5 and C6) of the NASA \textit{K2} mission. We set out to validate these systems by using a suite of follow-up observations, including adaptive optics, speckle imaging, and reconnaissance spectroscopy. The overlap between C5 with C16 and C18, and C6 with C17, yields lightcurves with long baselines that allow us to measure the transit ephemeris very precisely, revisit single transit candidates identified in earlier campaigns, and search for additional transiting planets with longer periods not detectable in previous works. Using \texttt{vespa}, we compute false positive probabilities of less than 1\% for 37 candidates orbiting 29 unique host stars and hence statistically validate them as planets. These planets have a typical size of $2.2R_{\oplus}$ and orbital periods between 1.99 and 52.71 days. We highlight interesting systems including a sub-Neptune with the longest period detected by \textit{K2}, sub-Saturns around F stars, several multi-planetary systems in a variety of architectures. These results show that a wealth of planetary systems still remains in the \textit{K2} data, some of which can be validated using minimal follow-up observations and taking advantage of analyses presented in previous catalogs.
description: 25 pages, 12 figures, accepted for publication in MNRAS
NEUROPHYSIOLOGICAL PREDICTORS OF ACUTE HEMORRHAGIC STROKE
Creators: name: Sadullayeva, Kunduz
Publisher: name: Zenodo
Year: 2023

description: Stroke is the most important medical and social problem, due to its high proportion in morbidity, subsequent disability and mortality among patients of working age. The purpose of the study. Prediction of the course of the acute period of hemorrhagic parenchymal stroke (supratentorial hemispheric hematomas) based on neuroimaging data (localization, lateralization, hematoma volume) and neurophysiological data.
EVALUACIÓN DE SUSTRATOS ORGÁNICOS EN LA GERMINACIÓN DE Swietenia humilis Zucc., EN IGUALAPA, GUERRERO.
Creators: name: De Jesús Sánchez, Conrado Aldehir
Publisher: name: figshare
Year: 2021
Subjects: subject: 70501 Agroforestry
subject: FOS: Agriculture, forestry and fisheries

description: Los bosques de Swietenia humilis Zucc han sido víctimas del mal manejo y la tala ilegal reduciendo el número de individuos de esta especie en la comunidad de Igualapa, Guerrero. Por otra parte, los pobladores de la comunidad desconocen el manejo de la especie para su propagación en diferentes sustratos orgánicos debido a la falta de información en relación a la especie. Nuestro objetivo es determinar el sustrato orgánico (tierra de monte, turba de coco, composta, vermicomposta y un testigo) con mejor respuesta en la germinación de Swietenia humilis Zucc., en Igualapa, Guerrero, así como conocer el comportamiento de las plantas en las variables altura de la planta, diámetro y número de hojas de la Swietenia humilis Zucc. El experimento consistió en un diseño completamente al azar con 5 tratamientos y 10 repeticiones. Las variables evaluadas fueron: días de germinación, índice de germinación, número de hojas, altura de planta y diámetro del tallo, las cuales fueron evaluadas de la siguiente manera; 1) Días de germinación: se registraron mediante el conteo de las semillas que hayan emergido del sustrato, 2) Índice de germinación (IG): se evaluó con la metodología utilizada por González-Zertuche y Orozco-Segovia (1996), 3) Altura de la planta (cm): se midió con ayuda de una regla realizando tres evaluaciones a los 6, 15 y 60 días, 4) Número de hojas: se contaron las hojas de la plántula a los 6, 15 y 60 días, 5) Diámetro del tallo (cm): en este caso, la variable fue evaluada con un vernier digital modelo CD-6” CSX marca Mitutoyo, la toma de datos se realizó considerando las dos variables anteriores. Con base en los resultados se concluye que no hubo diferencia estadística significativa en las variables días de germinación, número de hojas, diámetro del tallo, sin embargo en la altura de la planta si existió diferencia estadística significativa en la segunda evaluación (15 días) los tratamientos T4 y T5 resultaron ser mejores estadísticamente. Por su parte, el índice de germinación muestra que las semillas reaccionaron de manera distinta según los sustratos evaluados. Por tanto, se recomienda realizar un análisis de la calidad nutrimental de los sustratos a utilizar antes de realizar un estudio de germinación.
Additional file 1 of Ipragliflozin and sitagliptin differentially affect lipid and apolipoprotein profiles in type 2 diabetes: the SUCRE study
Creators: name: Nagao, Mototsugu
name: Sasaki, Jun
name: Tanimura-Inagaki, Kyoko
name: Sakuma, Ichiro
name: Sugihara, Hitoshi
name: Oikawa, Shinichi
Publisher: name: figshare
Year: 2024
Subjects: subject: Biochemistry
subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Physiology
subject: Pharmacology
subject: Chemical Sciences not elsewhere classified
subject: Cancer
subject: Virology

description: Supplementary Material 1
Polymer-Derived SiOC Integrated with a Graphene Aerogel As a Highly Stable Li-Ion Battery Anode
Creators: name: Shao, Gaofeng
name: Hanaor, Dorian A. H.
name: Wang, Jun
name: Kober, Delf
name: Li, Shuang
name: Wang, Xifan
name: Shen, Xiaodong
name: Bekheet, Maged F.
name: Gurlo, Aleksander
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Amorphous polymer derived silicon oxycarbide (SiOC) is an attractive candidate for Lithium ion battery anodes, as an alternative to graphite, which is limited to a theoretical capacity of 372 mAh/g. However, SiOC tends to exhibit poor transport properties and cycling performance as a result of sparsely distributed carbon clusters and inefficient active sites. To overcome these limitations, we designed and fabricated a layered graphene SiOC heterostructure by solvent assisted infiltration of a polymeric precursor into a modified three dimensional graphene aerogel skeleton. The use of a high melting point solvent facilitated the precursors freeze drying, which following pyrolysis yielded SiOC as a layer supported on the surface of nitrogen doped reduced graphene oxide aerogels. The fabrication method employed here modifies the composition and microstructure of the SiOC phase. Among the studied materials, the highest levels of performance were obtained for a sample of moderate SiOC content, in which the graphene network constituted 19.8 wt % of the system. In these materials, a stable reversible charge capacity of 751 mAh/g was achieved at low charge rates. At high charge rates of 1480 mA/g, the capacity retention was ca. 95% (352 mAh/g) after 1000 consecutive cycles. At all rates, Coulombic efficiencies greater than 99% were maintained following the first cycle. Performance across all indicators was majorly improved in the graphene aerogel SiOC nanocomposites, compared with unsupported SiOC. The performance was attributed to mechanisms across multiple length scales. The presence of oxygen rich SiO4-xCx tetrahedral units and a continuous free carbon network within the SiOC provides sites for reversible lithiation, while high ionic and electronic transport is provided by the layered graphene SiOC heterostructure.
Il belcanto di Oscar: trasformazioni grottesche del paggio operistico
Creators: name: Russo, Paolo
Publisher: name: Università degli Studi di Milano
Year: 2014

description: The grotesque can then be seen as the aesthetic effect generated by the clash between different categories and genres of representation. The dramatic function of the page Oscar in Un ballo in maschera arises from the cross of two different triangles: the dramatic positions tieing him with Cherubino (Nozze di Figaro) and Smeton (Anna Bolena), and the vocal triangle binding him to Abigaille (Nabucco) and Gilda (Rigoletto). In this case, infact, Verdi declines, the version nor heroic nor pathetic but grotesque of belcanto. For his vocality, Oscar is in an eccentric position with respect to the line that binds the operatic pages such as Cherubino and Smeton. This line, however, constitutes the reference horizon on which he projects himself, according to well established Nineteenth-Century expectations of the spectators.
description: Itinera, No 8 (2014)
Crystal Growth of the Quasi-2D Quarternary Compound AgCrP$_2$S$_6$ by Chemical Vapor Transport
Creators: name: Selter, Sebastian
name: Shemerliuk, Yuliia
name: Büchner, Bernd
name: Aswartham, Saicharan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We report optimized crystal growth conditions for the quarternary compound AgCrP$_2$S$_6$ by chemical vapor transport. Compositional and structural characterization of the obtained crystals were carried out by means of energy-dispersive X-ray spectroscopy and powder X-ray diffraction. AgCrP$_2$S$_6$ is structurally closely related to the $M_2$P$_2$S$_6$ family, which contains several compounds that are under investigation as 2D magnets. As-grown crystals exhibit a plate-like, layered morphology as well as a hexagonal habitus. AgCrP$_2$S$_6$ crystallizes in monoclinic symmetry in the space group $P2/a$ (No. 13). The successful growth of large high-quality single crystals paves the way for further investigations of low dimensional magnetism and its anisotropies in the future and may further allow for the manufacturing of few-layer (or even monolayer) samples by exfoliation.
description: Submitted to Crystals; 10 pages, 5 figures, 26 references
Unveiling the impact of the bias-dependent charge neutrality point on graphene-based multi-transistor applications
Creators: name: Pasadas, Francisco
name: Medina-Rull, Alberto
name: Feijoo, Pedro Carlos
name: Pacheco-Sanchez, Anibal
name: Marin, Enrique G.
name: Ruiz, Francisco G.
name: Rodriguez, Noel
name: Godoy, Andrés
name: Jiménez, David
Publisher: name: arXiv
Year: 2021
Subjects: subject: Applied Physics (physics.app-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The Dirac voltage of a graphene field-effect transistor (GFET) stands for the gate bias that sets the charge neutrality condition in the channel, thus resulting in a minimum conductivity. Controlling its dependence on the terminal biases is crucial for the design and optimization of radio-frequency applications based on multiple GFETs. However, the previous analysis of such dependence carried out for a single device can lead to confusion and if not properly understood could result in circuit designs with poor performance. The control of the Dirac point shift (DPS) is particularly important for the deployment of graphene-based differential circuit topologies where keeping a strict symmetry between the electrical balanced branches is crucial for exploiting the advantages of such topologies. This note sheds light on the impact of terminal biases on the DPS in a real device and sets a rigorous methodology to control it so to eventually optimize and exploit the performance of radio-frequency applications based on GFETs.
description: 7 pages, 3 figures, 1 table
Challenge on the Astrophysical R-process Calculation with Nuclear Mass Models
Creators: name: Baohua, Sun
name: Jie, Meng
Publisher: name: arXiv
Year: 2008
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Our understanding of the rapid neutron capture nucleosynthesis process in universe depends on the reliability of nuclear mass predictions. Initiated by the newly developed mass table in the relativistic mean field theory (RMF), in this paper the influence of mass models on the $r$-process calculations is investigated assuming the same astrophysical conditions. The different model predictions on the so far unreachable nuclei lead to significant deviations in the calculated r-process abundances.
description: 3 pages, 3 figures
Chromohydrodynamical instabilities induced by relativistic jets
Creators: name: Mannarelli, Massimo
name: Manuel, Cristina
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the properties of the chromohydrodynamical instabilities induced by a relativistic jet that crosses the quark-gluon plasma. Assuming that the jet of particles and the plasma can be described using a hydrodynamical approach, we derive and discuss the dispersion laws for the unstable collective modes. In our analysis the chromohydrodynamical equations for the collective modes are tackled in the linear response approximation. Such an approximation, valid for short time scales, allows to study in a straightforward way the dependence of the dispersion laws of the collective modes on the velocity of the jet, on the magnitude of the momentum of the collective mode and on the angle between these two quantities. We find that unstable modes arise for velocity of the jet larger than the speed of the sound of the plasma and only modes with momenta smaller than a certain values are unstable. Moreover, for ultrarelativistic velocities of the jet the longitudinal mode becomes stable and the most unstable modes correspond to relative angles between the velocity of the jet and momentum of the collective mode larger than $\sim π/8$. Our results suggest an alternative mechanism for the description of the jet quenching phenomenon, where the jet crossing the plasma loses energy exciting colored unstable modes.
description: 15 pages, 5 figures, added a paragraph at the end of Section IIIB, corrected typo in Eq.(67). Version to appear in Phys. Rev. D
Towards NIR-VIS Masked Face Recognition
Creators: name: Du, Hang
name: Shi, Hailin
name: Liu, Yinglu
name: Zeng, Dan
name: Mei, Tao
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Near-infrared to visible (NIR-VIS) face recognition is the most common case in heterogeneous face recognition, which aims to match a pair of face images captured from two different modalities. Existing deep learning based methods have made remarkable progress in NIR-VIS face recognition, while it encounters certain newly-emerged difficulties during the pandemic of COVID-19, since people are supposed to wear facial masks to cut off the spread of the virus. We define this task as NIR-VIS masked face recognition, and find it problematic with the masked face in the NIR probe image. First, the lack of masked face data is a challenging issue for the network training. Second, most of the facial parts (cheeks, mouth, nose etc.) are fully occluded by the mask, which leads to a large amount of loss of information. Third, the domain gap still exists in the remaining facial parts. In such scenario, the existing methods suffer from significant performance degradation caused by the above issues. In this paper, we aim to address the challenge of NIR-VIS masked face recognition from the perspectives of training data and training method. Specifically, we propose a novel heterogeneous training method to maximize the mutual information shared by the face representation of two domains with the help of semi-siamese networks. In addition, a 3D face reconstruction based approach is employed to synthesize masked face from the existing NIR image. Resorting to these practices, our solution provides the domain-invariant face representation which is also robust to the mask occlusion. Extensive experiments on three NIR-VIS face datasets demonstrate the effectiveness and cross-dataset-generalization capacity of our method.
Realization and characterization of a low intensity noise ultrafast Yb-doped fiber amplifier
Creators: name: Canella, Francesco
name: Molteni, Lisa Marta
name: Cialdi, Simone
name: Laporta, Paolo
name: Coluccelli, Nicola
name: Galzerano, Gianluca
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We report on the design and whole characterization of low-noise and affordable-cost Yb-doped double-clad fiber amplifiers operating at room temperature in the near-infrared spectral region at pulse repetition rate of 160 MHz. Two different experimental configurations are discussed. In the first one, a broadband seed radiation with a transform limited pulse duration of 71 fs, an optical spectrum of 20 nm wide at around 1040 nm, and 20 mW average power is adopted. In the second configuration, the seed radiation is constituted by stretched pulses with a time duration as long as 170 ps, with a 5-nm narrow pulse spectrum centered at 1029 nm and 2 mW average input power. In both cases we obtained transform limited pulse trains with an amplified output power exceeding 2 W. Furthermore, relative intensity noise measurements show that no significant noise degradation occurs during the amplification process.
Integration" and "the integration of faith and learning
Creators: name: Badley, Kenneth Rea
Publisher: name: University of British Columbia
Year: 2010

description: This study attempts to determine what use the term "integration" has in educational discourse, specifically as it appears in the popular phrase in Christian higher education, "the integration of faith and learning." Chapter I records that many educators see widespread disintegration in contemporary education. This perceived disintegration has led to many calls and proposals for educational integration. While educators perceive this increased need for integration, what "integration" means is less and less clear. By surveying actual usage in educational writing, this thesis distinguishes four general senses of "integration": fusion, incorporation, correlation, and dialogical (in Appendix A and Chapter III). It then explores further typical elements of meaning in educational uses of "integration" (Chapter IV). Chapters III and IV reveal and discuss a number of points of contention between educators as to the "meaning of integration." Chapter V identifies five main sources of the confusion that often accompanies uses of "integration." It is a positive term and frequently is employed primarily for its value as a slogan. Different educators give "integration" at least three different psychological meanings. The same word is used to denote both processes and end states. It is a polymorphous term whose meaning is not clear until what is being integrated is specified. It is a terra that invites conception-building, though conceptions are rarely announced as such; usually educators' visions of what ought to be come cloaked as definitions of terms. "The integration of faith and learning" suffers from every weakness that "integration" itself encounters. Its popularity in certain sectors of church education is understandable when considered in its historical context: some branches of the church that once largely abandoned higher education are now trying to express a new interest in it. "Integration" is a choice word to serve as a slogan that expresses a certain conception of Christian education. Beyond its function as a slogan, and despite the other problems that frequently accompany its use, "integration" does have use in education, partly because integration is an important concept in education.
Nonuniform Sampling Rate Conversion: An Efficient Approach
Creators: name: Martínez-Nuevo, Pablo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Signal Processing (eess.SP)
subject: Information Theory (cs.IT)
subject: Sound (cs.SD)
subject: Audio and Speech Processing (eess.AS)
subject: Image and Video Processing (eess.IV)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: We present a discrete-time algorithm for nonuniform sampling rate conversion that presents low computational complexity and memory requirements. It generalizes arbitrary sampling rate conversion by accommodating time-varying conversion ratios, i.e., it can efficiently adapt to instantaneous changes of the input and output sampling rates. This approach is based on appropriately factorizing the time-varying discrete-time filter used for the conversion. Common filters that satisfy this factorization property are those where the underlying continuous-time filter consists of linear combinations of exponentials, e.g., those described by linear constant-coefficient differential equations. This factorization separates the computation into two parts: one consisting of a factor solely depending on the output sampling instants and the other consists of a summation -- that can be computed recursively -- whose terms depend solely on the input sampling instants and its number of terms is given by a relationship between input and output sampling instants. Thus, nonuniform sampling rates can be accommodated by updating the factors involved and adjusting the number of terms added. When the impulse response consists of exponentials, computing the factors can be done recursively in an efficient manner.
description: 10 pages, 10 figures, journal
Spin and Charge Shot Noise in Mesoscopic Spin Hall Systems
Creators: name: Dragomirova, R. L.
name: Zarbo, L. P.
name: Nikolic, B. K.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Injection of unpolarized charge current through the longitudinal leads of a four-terminal two-dimensional electron gas with the Rashba spin-orbit (SO) coupling and/or SO scattering off extrinsic impurities is responsible not only for the pure spin Hall current in the transverse leads, but also for random time-dependent current fluctuations. We employ the scattering approach to current-current correlations in multiterminal nanoscale conductors to analyze the shot noise of transverse pure spin Hall and zero charge current, or transverse spin current and non-zero charge Hall current, driven by unpolarized or spin-polarized longitudinal current, respectively. Since any spin-flip acts as an additional source of noise, we argue that these shot noises offer a unique tool to differentiate between intrinsic and extrinsic SO mechanisms underlying the spin Hall effect in paramagnetic devices.
description: 5 pages, 2 figures (5 embedded EPS files)
WiFiNet: WiFi-based indoor localisation using CNNs
Creators: name: Hernández, Noelia
name: Parra, Ignacio
name: Corrales, Héctor
name: Izquierdo, Rubén
name: Ballardini, Augusto Luis
name: Salinas, Carlota
name: Garcia, Iván
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Different technologies have been proposed to provide indoor localisation: magnetic field, bluetooth , WiFi, etc. Among them, WiFi is the one with the highest availability and highest accuracy. This fact allows for an ubiquitous accurate localisation available for almost any environment and any device. However, WiFi-based localisation is still an open problem. In this article, we propose a new WiFi-based indoor localisation system that takes advantage of the great ability of Convolutional Neural Networks in classification problems. Three different approaches were used to achieve this goal: a custom architecture called WiFiNet designed and trained specifically to solve this problem and the most popular pre-trained networks using both transfer learning and feature extraction. Results indicate that WiFiNet is as a great approach for indoor localisation in a medium-sized environment (30 positions and 113 access points) as it reduces the mean localisation error (33%) and the processing time when compared with state-of-the-art WiFi indoor localisation algorithms such as SVM.
Measurement of the muon transfer rate from muonic hydrogen to oxygen in the range 70-336 K
Creators: name: Pizzolotto, C.
name: Sbrizzi, A.
name: Adamczak, A.
name: Bakalov, D.
name: Baldazzi, G.
name: Baruzzo, M.
name: Benocci, R.
name: Bertoni, R.
name: Bonesini, M.
name: Cabrera, H.
name: Cirrincione, D.
name: Clemenza, M.
name: Colace, L.
name: Danailov, M.
name: Danev, P.
name: de Bari, A.
name: De Vecchio, C.
name: De Vincenzi, M.
name: Fasci, E.
name: Fuschino, F.
name: Gadedjisso-Tossou, K. S.
name: Gianfrani, L.
name: Ishida, K.
name: Labanti, C.
name: Maggi, V.
name: Mazza, R.
name: Menegolli, A.
name: Mocchiutti, E.
name: Monzani, S.
name: Moretti, L.
name: Morgante, G.
name: Niemela, J.
name: Pullia, A.
name: Ramponi, R.
name: Rignanese, L. P.
name: Rossella, M.
name: Stoilov, M.
name: Stoychev, L.
name: Suarez-Vargas, J. J.
name: Tortora, L.
name: Vallazza, E.
name: Vacchi, A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: The first measurement of the temperature dependence of the muon transfer rate from muonic hydrogen to oxygen was performed by the FAMU collaboration in 2016. The results provide evidence that the transfer rate rises with the temperature in the range 104-300 K. This paper presents the results of the experiment done in 2018 to extend the measurements towards lower (70 K) and higher (336 K) temperatures. The 2018 results confirm the temperature dependence of the muon transfer rate observed in 2016 and sets firm ground for comparison with the theoretical predictions.
FedMatch: Federated Learning Over Heterogeneous Question Answering Data
Creators: name: Chen, Jiangui
name: Zhang, Ruqing
name: Guo, Jiafeng
name: Fan, Yixing
name: Cheng, Xueqi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: Question Answering (QA), a popular and promising technique for intelligent information access, faces a dilemma about data as most other AI techniques. On one hand, modern QA methods rely on deep learning models which are typically data-hungry. Therefore, it is expected to collect and fuse all the available QA datasets together in a common site for developing a powerful QA model. On the other hand, real-world QA datasets are typically distributed in the form of isolated islands belonging to different parties. Due to the increasing awareness of privacy security, it is almost impossible to integrate the data scattered around, or the cost is prohibited. A possible solution to this dilemma is a new approach known as federated learning, which is a privacy-preserving machine learning technique over distributed datasets. In this work, we propose to adopt federated learning for QA with the special concern on the statistical heterogeneity of the QA data. Here the heterogeneity refers to the fact that annotated QA data are typically with non-identical and independent distribution (non-IID) and unbalanced sizes in practice. Traditional federated learning methods may sacrifice the accuracy of individual models under the heterogeneous situation. To tackle this problem, we propose a novel Federated Matching framework for QA, named FedMatch, with a backbone-patch architecture. The shared backbone is to distill the common knowledge of all the participants while the private patch is a compact and efficient module to retain the domain information for each participant. To facilitate the evaluation, we build a benchmark collection based on several QA datasets from different domains to simulate the heterogeneous situation in practice. Empirical studies demonstrate that our model can achieve significant improvements against the baselines over all the datasets.
description: Accepted by CIKM 2021
Timeidae Gray 1867
Creators: name: Leite, Dora M. B.
name: Fonseca, Cássio A.
name: Leal, Camille V.
name: Hajdu, Eduardo
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Porifera
Demospongiae
Hadromerida
Timeidae

description: Family TIMEIDAE Gray, 1867   Diagnosis. Tethyida presenting encrusting growth form with tylostyles arranged in tracts ending as bouquets, which generally pierce the surface (hispid). Tracts may be absent, in which case tylostyles are organized as bouquets. Additional tylostyles may occur in criss-cross fashion between the tracts or sparsely disposed tangentially to the surface or to the substrate. Microscleres are euasters dispersed in the choanosome, denser at the substrate and towards the surface, and forming a crust at the surface. (modified from Rützler, 2002 to include the species described herein)
 Remarks. The diagnosis provided by Rützler (2002) had to be slightly modified to accommodate specimens described here, with skeletal architectures devoid of tracts of tylostyles. These megascleres are organized solely in bouquets, with some laying tangential to the surface in the new species described below.
description: Published as part of Leite, Dora M. B., Fonseca, Cássio A., Leal, Camille V. & Hajdu, Eduardo, 2015, Two new species of Timea from the Southwest Atlantic (Timeidae, Demospongiae, Porifera), pp. 161-181 in Zootaxa 4034 (1) on pages 162-163, DOI: 10.11646/zootaxa.4034.1.8, http://zenodo.org/record/238054
A New Model of Agegraphic Dark Energy
Creators: name: Wei, Hao
name: Cai, Rong-Gen
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this note, we propose a new model of agegraphic dark energy based on the Károlyházy relation, where the time scale is chosen to be the conformal time $η$ of the Friedmann-Robertson-Walker (FRW) universe. We find that in the radiation-dominated epoch, the equation-of-state parameter of the new agegraphic dark energy $w_q=-1/3$ whereas $Ω_q=n^2a^2$; in the matter-dominated epoch, $w_q=-2/3$ whereas $Ω_q=n^2a^2/4$; eventually, the new agegraphic dark energy dominates; in the late time $w_q\to -1$ when $a\to\infty$, and the new agegraphic dark energy mimics a cosmological constant. In every stage, all things are consistent. The confusion in the original agegraphic dark energy model proposed in arXiv:0707.4049 disappears in this new model. Furthermore, $Ω_q\ll 1$ is naturally satisfied in both radiation-dominated and matter-dominated epochs where $a\ll 1$. In addition, we further extend the new agegraphic dark energy model by including the interaction between the new agegraphic dark energy and background matter. In this case, we find that $w_q$ can cross the phantom divide.
description: 8 pages, revtex4; v2: Phys. Lett. B in press; v3: published version
Direct evaluation of attachment and detachment rate factors of atoms in crystallizing supercooled liquids
Creators: name: Yarullin, Dinar T.
name: Galimzyanov, Bulat N.
name: Mokshin, Anatolii V.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Kinetic rate factors of crystallization have a direct effect on formation and growth of an ordered solid phase in supercooled liquids and glasses. Using crystallizing Lennard-Jones liquid as an example, in the present work we perform a \textit{direct} quantitative estimation of values of the key crystallization kinetic rate factors -- the rate $g^{+}$ of particle attachments to a crystalline nucleus and the rate $g^{-}$ of particle detachments from a nucleus. We propose a numerical approach, according to which a statistical treatment of the results of molecular dynamics simulations was performed without using any model functions and/or fitting parameters. This approach allows one to accurately estimate the critical nucleus size $n_{c}$. We find that for the growing nuclei, whose sizes are larger than the critical size $n_{c}$, the dependence of these kinetic rate factors on the nucleus size $n$ follows a power law. In the case of the subnucleation regime, when the nuclei are smaller than $n_{c}$, the $n$-dependence of the quantity $g^{+}$ is strongly determined by the inherent microscopic properties of a system and this dependence cannot be described in the framework of any universal law (for example, a power law). It has been established that the dependence of the growth rate of a crystalline nucleus on its size goes into the stationary regime at the sizes $n>3n_{c}$ particles.
description: 18 pages, 5 figures, 1 table
Characterization and fabrication of surface junctions with application to photovoltaic energy conversion
Creators: name: Camporese, Daniel Stefen
Publisher: name: University of British Columbia
Year: 2010

description: The central topic of this thesis is the semiconductor surface junction of which two types will be discussed here: the metal-insulator-semiconductor (MIS) junction and the insulator charge-induced (ICI) junction. These junctions are investigated by correlating theoretical models for these devices with measurements performed on devices fabricated in the laboratory. The MIS junction is formed when a metal is deposited on a semiconductor which has had a thin insulator formed on its surface. The insulator is so thin that tunneling of electrons between the metal and semiconductor is possible. A difference in work function between the metal and the semiconductor will produce a field in the semiconductor. A metal with the appropriate work function will produce inversion of the semiconductor surface. The thin insulator reduces the normal thermionic emission current which flows between the metal and the semiconductor. If the semiconductor surface is inverted, fewer majority carriers than minority carriers are available to flow into the metal. In this work, the ratio of net minority to majority carrier current flows is measured to establish that MIS junctions can be dominated by minority carrier currents thus making their electrical properties very similar to those of a standard pn junction diode. This hypothesis is demonstrated by using the MIS junction to form the collectors and emitters of bipolar transistors. These transistor structures are also used to measure the minority carrier lifetime in the transistor base. The ICI junction is formed when an insulator is deposited on a semiconductor. The naturally-occuring positive charge in the insulator produces a field in the semiconductor. For insulator charge of a particular sign, the semiconductor doping type can be chosen such that the semiconductor surface is inverted by the insulator charge. Analysis of this type of junction is performed using MOS capacitor techniques. In order to produce a useful device, contact to the inversion layer under the insulator must be made with another type of junction. In this work, the MIS junction is placed beside the ICI junction to contact the inversion layer. The resulting device can be very useful as a high efficiency solar cell (known as an inversion layer solar cell) since the ICI junction can be designed to couple light efficiently into the semiconductor and the junction is at the surface, where most of the short wavelength photons are absorbed. A simple quasi-two dimensional model for the inversion layer cell is presented and the results of this model are used to determine the factors limiting the efficiency of these solar cells. Actual inversion layer solar cells with efficiencies as high as 14% have been fabricated using a unique shadow mask technology developed during this work.
Counterbalancing light absorption and ionic transport losses in the electrolyte for integrated solar water splitting with III-V/Si dual-junctions
Creators: name: Kölbach, Moritz
name: Özen, Ciler
name: Höhn, Oliver
name: Lackner, David
name: Feifel, Markus
name: Abdi, Fatwa F.
name: May, Matthias M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Recently, significant progress in the development of III-V/Si dual-junction solar cells has been achieved. This not only boosts the efficiency of Si-based photovoltaic solar cells, but also offers the possibility of highly efficient green hydrogen production via solar water splitting. Using such dual-junction cells in a highly integrated photoelectrochemical approach and aiming for upscaled devices with solar-to-hydrogen efficiencies beyond 20\%, however, the following frequently neglected contrary effects become relevant: (i) light absorption in the electrolyte layer in front of the top absorber and (ii) the impact of this layer on the ohmic and transport losses. Here, we initially model the influence of the electrolyte layer thickness on the maximum achievable solar-to-hydrogen efficiency of a device with an Si bottom cell and show how the top absorber bandgap has to be adapted to minimise efficiency losses. Then, the contrary effects of increasing ohmic and transport losses with decreasing electrolyte layer thickness are evaluated. This allows us to estimate an optimum electrolyte layer thickness range that counterbalances the effects of parasitic absorption and ohmic/transport losses. We show that fine-tuning of the top absorber bandgap and the water layer thickness can lead to an STH efficiency increase of up to 1\% absolute. Our results allow us to propose important design rules for high-efficiency photoelectrochemical devices based on multi-junction photoabsorbers.
description: This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Applied Physics Letters and may be found at https://aip.scitation.org/doi/10.1063/5.0060700 . This version: Update to final, accepted manuscript version
Interacting particles system revisited in the framework of the q-deformed algebra
Creators: name: Scarfone, A. M.
name: Swamy, P. Narayana
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Quantum Algebra (math.QA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We discuss the possibility of interpreting a q-deformed non-interacting system as incorporating the effects of interactions among its particles. This can be accomplished, for instance, in an ensemble of $q$-Bosons by means of the virial expansion of a real gas in powers of the deformed parameter. The lowest order virial coefficient reduces to the case of the standard, non-interacting Bose gas, while the higher order virial coefficients contain effects arising from the interaction. The same picture can be drawn in a quantum mechanical system where it is shown that the q-deformed momentum can be expanded in a series contains high-order powers of the standard quantum phase-space variables. Motivated by this result, we introduce, in the classical framework, a transformation relating the momentum of a free system with the momentum of an interacting system. It is shown that the canonical quantization applied to the interacting system imply a q-deformed quantization for the free system.
description: 13 pages, no figures, accepted on JPA
Reconfigurable Plasmonic Chirality: Fundamentals and Applications
Creators: name: Neubrech, Frank
name: Hentschel, Mario
name: Liu, Na
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Molecular chirality is a geometric property that is of great importance in chemistry, biology, and medicine. Recently, plasmonic nanostructures that exhibit distinct chiroptical responses have attracted tremendous interest, given their ability to emulate the properties of chiral molecules with tailored and pronounced optical characteristics. However, the optical chirality of such human-made structures is in general static and cannot be manipulated postfabrication. Herein, different concepts to reconfigure the chiroptical responses of plasmonic nano- and micro-objects are outlined. Depending on the utilized strategies and stimuli, the chiroptical signature, the 3D structural conformation, or both can be reconfigured. Optical devices based on plasmonic nanostructures with reconfigurable chirality possess great potential in practical applications, ranging from polarization conversion elements to enantioselective analysis, chiral sensing, and catalysis.
Additional file 1 of Cardiorenal effectiveness of empagliflozin vs. glucagon-like peptide-1 receptor agonists: final-year results from the EMPRISE study
Creators: name: Htoo, Phyo T.
name: Tesfaye, Helen
name: Schneeweiss, Sebastian
name: Wexler, Deborah J.
name: Everett, Brendan M.
name: Glynn, Robert J.
name: Schmedt, Niklas
name: Koeneman, Lisette
name: Déruaz-Luyet, Anouk
name: Paik, Julie M.
name: Patorno, Elisabetta
Publisher: name: figshare
Year: 2024
Subjects: subject: Medicine
subject: Physiology
subject: FOS: Biological sciences
subject: Chemical Sciences not elsewhere classified
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Mathematical Sciences not elsewhere classified
subject: Marine Biology
subject: Science Policy

description: Supplementary Material 1
Additional file 1 of Hospital readiness for the provision of care to critically ill patients in Tanzania– an in-depth cross-sectional study
Creators: name: Khalid, Karima
name: Schell, Carl Otto
name: Oliwa, Jacquie
name: English, Mike
name: Onyango, Onesmus
name: Mcknight, Jacob
name: Mkumbo, Elibariki
name: Awadh, Khamis
name: Maiba, John
name: Baker, Tim
Publisher: name: figshare
Year: 2024
Subjects: subject: Medicine
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Cancer
subject: Science Policy
subject: Virology

description: Additional File 1: Supplementary Table 1: The hospital readiness requirements for Essential Emergency and Critical Care. Supplementary Table 2: Advanced Critical Care Hospital Readiness Requirements