cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The One-Loop Five-Graviton Amplitude and the Effective Action
Creators: name: Richards, David M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider the one-loop five-graviton amplitude in type II string theory calculated in the light-cone gauge. Although it is not possible to explicitly evaluate the integrals over the positions of the vertex operators, a low-energy expansion can be obtained, which can then be used to infer terms in the low-energy effective action. After subtracting diagrams due to known D^{2n}R^4 terms, we show the absence of one-loop R^5 and D^2R^5 terms and determine the exact structure of the one-loop D^4R^5 terms where, interestingly, the coefficient in front of the D^4R^5 terms is identical to the coefficient in front of the D^6R^4 term. Finally, we show that, up to D^6R^4 ~ D^4R^5, the ε_{10} terms package together with the t_8 terms in the usual combination (t_8t_8\pm{1/8}ε_{10}ε_{10}).
description: 48 pages, 3 figures; corrected typos, added references
ZPF, Zitterbewegung and Inertial Mass
Creators: name: Sidharth, Burra G.
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: In this paper, we argue that the background Zero Point Field, induces an oscillatory motion which we identify with zitterbewegung. We deduce that this is the origin of inertial mass
description: 9 pages, tex
The formation of O₂(a¹Δg̳) by O-atom recombination
Creators: name: Ali, Ayoub Azam
Publisher: name: University of British Columbia
Year: 2010

description: The formation of O₂(a) by the recombination of o-atoms was studied in a discharge-flow system. The rate of formation of O₂(a) by the homogeneous recombination of O-atoms in the absence of O₂ was found to be second-order in [O] and first-order in [M]. When O₂ was added the rate of formation increased linearly with increasing [O₂]. The following mechanism was presented as being the simplest which is consistent with the data: [See Thesis for Equations] where, "f" represents the fractional yield of the specified O₂ product in the reactions, and M is mainly N₂. Analysis of the experimental data in terms of this mechanism gave the following results: [See Thesis for Equations] This mechanism is consistent with the O₂ (a) nightglow and with the experimental data when the following conditions are satisfied: a) k₂/k₃ = 0.12 b) f₃/f₂ = 8.5 c) f₁/f₃ = 0.6 The yield of O₂(a) by O-atom recombination on glass wool, with a surface recombination coefficient of 6(+/-1)x10⁻⁵, was found to be 0.08(+/-0.02).
The Kinematic Analysis of a Symmetrical Three-Degree-of-Freedom Planar Parallel Manipulator
Creators: name: Chablat, Damien
name: Wenger, Philippe
Publisher: name: arXiv
Year: 2007
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Presented in this paper is the kinematic analysis of a symmetrical three-degree-of-freedom planar parallel manipulator. In opposite to serial manipulators, parallel manipulators can admit not only multiple inverse kinematic solutions, but also multiple direct kinematic solutions. This property produces more complicated kinematic models but allows more flexibility in trajectory planning. To take into account this property, the notion of aspects, i.e. the maximal singularity-free domains, was introduced, based on the notion of working modes, which makes it possible to separate the inverse kinematic solutions. The aim of this paper is to show that a non-singular assembly-mode changing trajectory exist for a symmetrical planar parallel manipulator, with equilateral base and platform triangle.
Self-Hybridized Polaritonic Emission from Layered Perovskites
Creators: name: Anantharaman, Surendra B.
name: Stevens, Christopher E.
name: Lynch, Jason
name: Song, Baokun
name: Hou, Jin
name: Zhang, Huiqin
name: Jo, Kiyoung
name: Kumar, Pawan
name: Blancon, Jean-Christophe
name: Mohite, Aditya D.
name: Hendrickson, Joshua R.
name: Jariwala, Deep
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Other Condensed Matter (cond-mat.other)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Light-matter coupling in excitonic materials has been the subject of intense investigation due to emergence of new excitonic materials. Two-dimensional layered hybrid organic/inorganic perovskites (2D HOIPs) support strongly bound excitons at room-temperatures with some of the highest oscillator strengths and electric loss tangents among the known excitonic materials. Here, we report strong light-matter coupling in Ruddlesden-Popper phase 2D-HOIPs crystals without the necessity of an external cavity. We report concurrent occurrence of multiple-orders of hybrid light-matter states via both reflectance and luminescence spectroscopy in thick (> 100 nm) crystals and near-unity absorption in thin (< 20 nm) crystals. We observe resonances with quality factors > 250 in hybridized exciton-polaritons and identify a linear correlation between exciton-polariton mode splitting and extinction coefficient of the various 2D-HOIPs. Our work opens the door to studying polariton dynamics in self-hybridized and open cavity systems with broad applications in optoelectronics and photochemistry.
Психология как наука о субъекте и компортменте: за пределами психики и поведения
Creators: name: М. Перес-Альварес (Marino Pérez-Álvarez)
Publisher: name: Теоретичні дослідження у психології
Year: 2019
Subjects: бихевиоризм
компортмент
дуалистическая онтология
качественные исследования
позитивистский научный метод

description: Поворот к качественным исследованиям предполагает более открытую, плюралистическую концепцию психологии, чем наука о психике и поведении, как она обычно определяется. Историческая, онтологическая и гносеологическая привязка этой концепции психологии к позитивистскому методу естествознания, вероятно, исчерпала свои возможности и, содействовав её авторитету как науки, теперь стала препятствием. Предлагается переосмыслить психологию как науку о субъекте и компортменте в рамках контекстуальной герменевтической, социальной, поведенческой науки. Таким образом, не отвергая количественных исследований, психология восстанавливает территорию, оставленную в стороне, как интроспекция и предрефлексивное самосознание, и воссоединяется с традициями, маргинализированными в мейнстриме. С этой точки зрения психология может также восстановить свой авторитет как наука о человеке в свете современного скептицизма.
Pew Research Center: July 2019 Survey
Creators: name: Pew Research Center
Publisher: name: Roper Center for Public Opinion Research
Year: 2021

description: Satisfaction with direction of country (1); effect of organizations and institutions on society (7); 2020 presidential election (3); elected officials compromising (1); more power to United States presidents (1); confidence in President Donald Trump's ability to handle policies (9); Trump economic policy (1); Trump focus on domestic and foreign policy (1); threat level of international concerns to United States (7); United States respected by other countries (2); national economic conditions (2); personal economic conditions (2); favorability of political parties and government institutions (7); abortion (1); Iranian nuclear program (1); economic and trade policy towards China (1); undocumented immigrants in United States (3); opinion of Russia/China (2); health insurance (3); free trade and tariffs (2); North Korea (2); investigation into Russian involvement in 2016 election (2); Trump administration efforts in preventing future foreign influence in United States election (1); Roe vs. Wade Supreme Court decision (1); attendance at religious services (1); registered to vote (1).
Security and privacy for 6G: A survey on prospective technologies and challenges
Creators: name: Nguyen, Van-Linh
name: Lin, Po-Ching
name: Cheng, Bo-Chao
name: Hwang, Ren-Hung
name: Lin, Ying-Dar
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cryptography and Security (cs.CR)
subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Sixth-generation (6G) mobile networks will have to cope with diverse threats on a space-air-ground integrated network environment, novel technologies, and an accessible user information explosion. However, for now, security and privacy issues for 6G remain largely in concept. This survey provides a systematic overview of security and privacy issues based on prospective technologies for 6G in the physical, connection, and service layers, as well as through lessons learned from the failures of existing security architectures and state-of-the-art defenses. Two key lessons learned are as follows. First, other than inheriting vulnerabilities from the previous generations, 6G has new threat vectors from new radio technologies, such as the exposed location of radio stripes in ultra-massive MIMO systems at Terahertz bands and attacks against pervasive intelligence. Second, physical layer protection, deep network slicing, quantum-safe communications, artificial intelligence (AI) security, platform-agnostic security, real-time adaptive security, and novel data protection mechanisms such as distributed ledgers and differential privacy are the top promising techniques to mitigate the attack magnitude and personal data breaches substantially.
description: 45 pages, 28 figures, accepted at IEEE Communications Surveys and Tutorials, 2021
Spin blockade and lifetime-enhanced transport in a few-electron Si/SiGe double quantum dot
Creators: name: Shaji, Nakul
name: Simmons, C. B.
name: Thalakulam, Madhu
name: Klein, Levente J.
name: Qin, Hua
name: Luo, H.
name: Savage, D. E.
name: Lagally, M. G.
name: Rimberg, A. J.
name: Joynt, R.
name: Friesen, M.
name: Blick, R. H.
name: Coppersmith, S. N.
name: Eriksson, M. A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Spin blockade occurs when an electron is unable to access an energetically favorable path through a quantum dot due to spin conservation, resulting in a blockade of the current through the dot. Spin blockade is the basis of a number of recent advances in spintronics, including the measurement and the manipulation of individual electron spins. We report measurements of the spin blockade regime in a silicon double quantum dot, revealing a complementary phenomenon: lifetime-enhanced transport. We argue that our observations arise because the decay times for electron spins in silicon are long, enabling the electron to maintain its spin throughout its transit across the quantum dot and access fast paths that exist in some spin channels but not in others. Such long spin lifetimes are important for applications such as quantum computation and, more generally, spintronics.
description: Published version. Supplementary Information in appendices
Politics of the Heritage. From the building of the state nations to the local economic development. Introduction to the knowledge based economy
Creators: name: Mangani, Giorgio
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2021
Subjects: M-GGR/02 Geografia economico-politica

description: When I was young both the liberal and the marxist politicians and economists said that, to invest in culture, you had to make money before. Culture was at the end of the value chain; if you had got a welfare condition, then you could think to Art and Culture. Things changed actually a lot in the while. Culture-driven development, Creative classes and cities, Knowledge-based economies have become to-day new slogans and fashonable recepies, master keys for the local economic development. They seem a kind of revenge of the Culture on the Industrial production, now obliged to fully overturn the old style of thinking because of the need to make innovation and manufacturing cool products in the place of mass goods. This manual shows how long Culture and Cultural Heritage have been exploited in the economic and political world, in the building of the modern state nations, then to face to the first Western crisis of the Fordist paradigm in the Seventies of the last century, till to try inventing the new European Union cultural identity. The twenty-two chapters of this book also offer a shrewd path through many banal and simplifyng, sometimes too bright pictured approaches to the culture-led development and its satellite notions, clearifying the bad and good sides of this theory, to make able the reader, and possibly the planner, to find his/her original and site-specifc way in the always mobile and different on going territorial contexts.
Emulsion sheet doublets as interface trackers for the OPERA experiment
Creators: name: Ariga, A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: New methods for efficient and unambiguous interconnection between electronic counters and target units based on nuclear photographic emulsion films have been developed. The application to the OPERA experiment, that aims at detecting oscillations between mu neutrino and tau neutrino in the CNGS neutrino beam, is reported in this paper. In order to reduce background due to latent tracks collected before installation in the detector, on-site large-scale treatments of the emulsions ("refreshing") have been applied. Changeable Sheet (CSd) packages, each made of a doublet of emulsion films, have been designed, assembled and coupled to the OPERA target units ("ECC bricks"). A device has been built to print X-ray spots for accurate interconnection both within the CSd and between the CSd and the related ECC brick. Sample emulsion films have been extensively scanned with state-of-the-art automated optical microscopes. Efficient track-matching and powerful background rejection have been achieved in tests with electronically tagged penetrating muons. Further improvement of in-doublet film alignment was obtained by matching the pattern of low-energy electron tracks. The commissioning of the overall OPERA alignment procedure is in progress.
description: 19 pages, 19 figures
การคัดเลือกแอคติโนมัยสีทเอนโดไฟต์ที่ย่อยบีตา-กลูแคนและวิเคราะห์ยีนที่เกี่ยวข้อง (Screening of  ?-glucan degrading activities from endophytic actinomycetes and characterization of their genes)
Creators: name: ปาณัสม์ พูลสวัสดิ์
Publisher: name: Genetics Society of Thailand
Year: 2013
Subjects: actinomycete, endophyte, beta-glucanase, glycoside hydrolase

description: S1 (Special Issue 1), S.1, Thai Journal of Genetics
Polarization Independent Optical Isolator in Sagnac-Type Configuration
Creators: name: Al-Mahmoud, Mouhamad
name: Dimova, Emiliya
name: Hristova, Hristina
name: Coda, Virginie
name: Rangelov, Andon
name: Montemezzani, Germano
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We propose a polarization-independent optical isolator that does not use walk-off between the two orthogonal polarizations. The design is based on two Faraday rotators in combination with two half-wave plates in a closed, Sagnac-interferometer-like, configuration. An experimental prototype is tested successfully under variation of the input light polarization state with isolation level between 43 dB and 50 dB for all input polarizations (linear, circular, or elliptical).
Apropriações de tecnologias obsoletas e as audiovisualidades do contemporâneo: Um estudo de caso sobre a prática experimental de "Tudo que é luz desmancha no pixel"
Creators: name: Mariz, Luciano Soares
Publisher: name: Labfront/UEMG
Year: 2023

description: O artigo, apresenta um estudo de caso que objetiva compreender as repercussões estético-filosóficas no experimento "Tudo que é luz desmancha no pixel", performance audiovisual realizada na Universidade Federal de Campina Grande que se utiliza de aparatos tecnológicos descartados e considerados obsoletos pelo sistema industrial e mercadológico. Partindo de uma estruturação teórica fundamentada em PLAZA & TAVARES (1998), GRILO (2018), HUI (2022) e SIMONDON (1958), observa-se neste estudo de caso a apropriação de objetos técnicos obsoletos como potências para artemídia, capazes de subverter os sistemas hegemônicos da obsolescência programada e promover outros olhares ao modus operandi destas tecnologias. Assim, observa-se na prática da gambiarra e no estudo das realidades técnicas, possibilidades para promover pontos de fuga nas poéticas das audiovisualidades contemporâneas, quando os conjuntos técnicos obsoletos são confrontados com as cosmotécnicas da contemporaneidade.
Uniqueness Domains in the Workspace of Parallel Manipulators
Creators: name: Wenger, Philippe
name: Chablat, Damien
Publisher: name: arXiv
Year: 2007
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: This work investigates new kinematic features of parallel manipulators. It is well known that parallel manipulators admit generally several direct kinematic solutions for a given set of input joint values. The aim of this paper is to characterize the uniqueness domains in the workspace of parallel manipulators, as well as their image in the joint space. The study focuses on the most usual case of parallel manipulators with only one inverse kinematic solution. The notion of aspect introduced for serial manipulators in [Borrel 86] is redefined for such parallel manipulators. Then, it is shown that it is possible to link several solutions to the forward kinematic problem without meeting a singularity, thus meaning that the aspects are not uniqueness domains. An additional set of surfaces, namely the characteristic surfaces, are characterized which divide the workspace into basic regions and yield new uniqueness domains. This study is illustrated all along the paper with a 3-RPR planar parallel manipulator. An octree model of spaces is used to compute the joint space, the workspace and all other newly defined sets.
光子的歧途英语.pdf
Creators: name: Langlang Xu
Publisher: name: figshare
Year: 2021
Subjects: subject: 20502 Lasers and Quantum Electronics
subject: FOS: Physical sciences
subject: 20504 Photonics, Optoelectronics and Optical Communications
subject: Quantum Mechanics
subject: 20604 Quantum Optics

description: 并不是由观察方法决定的光子，而是由观察方法的不完整决定了不可能同时观察两种性质。当然，仅说这并不令人信服，本文将以一种新的观察方法结束，该方法可以同时检测这两个属性。实验之前，我们需要解决问题的症结，即“波粒对偶性”。
Evolution from a molecular Rydberg gas to an ultracold plasma in a seeded supersonic expansion of NO
Creators: name: Morrison, J. P.
name: Rennick, C. J.
name: Keller, J. S.
name: Grant, E. R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We report the spontaneous formation of a plasma from a gas of cold Rydberg molecules. Double-resonant laser excitation promotes nitric oxide, cooled to 1 K in a seeded supersonic molecular beam, to single Rydberg states extending as deep as 80 cm$^{-1}$ below the lowest ionization threshold. The density of excited molecules in the illuminated volume is as high as 1 x 10$^{13}$ cm$^{-3}$. This population evolves to produce prompt free electrons and a durable cold plasma of electrons and intact NO$^{+}$ ions.
description: 4 pages (two column) 3 figures; smaller figure files, corrected typos
LA METODICA IROG NEL FOLLOW UP DEI PAZIENTI AFFETTI DA NISTAGMO TRATTATI CHIRURGICAMENTE
Creators: name: Boccuzzi, Domenico
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2009

description: Il NISTAGMO è un disturbo della dinamica oculare caratterizzato da una successione ritmica più o meno regolare di movimenti coniugati, involontari e singoli. Tale patologia comporta un importante deficit visivo. I pazienti affetti da nistagmo presentano spesso una posizione anomala del capo (PAC) in cui l'intensità del nistagmo si riduce e la performance visiva migliora. Tale posizione non sempre corrisponde con la posizione primaria di sguardo, pertanto tali pazienti orientano il capo in modo da utilizzare tale posizione per guardare (torcicollo oculare). La registrazione dei movimenti oculari con metodica IROG nelle varie posizioni di sguardo (Infra Red Ocolography) consente di registrare una serie di parametri relativi al nistagmo quali ampiezza, intensità, frequenza e tempo di foveazione nelle varie posizioni di sguardo, e tamite l'elaborazione di questi dati fornita da un software, è possibile esprimere indici di performance visiva quali il NAFP (Nistagmus Acuity Function for Position Only). Tale indice descrive in modo molto più sensibile la performance visiva del paziente affetto da nistagmo rispetto ad una classica misurazione empirica dell'acuità visiva con l'ottotipo. Questo consente di monitorare nel tempo la performance visiva dei pazienti affetti da nistagmo valutando così miglioramenti o peggioramenti. In questo studio sono stati arruolati 18 pazienti affetti da nistagmo che presentavano posizione anomala del capo. I pazienti sono stati sottoposti ad inervento di Anderson per la correzione della posizione anomala del capo e per il miglioramento del nistagmo. I risutati ottenuti sono stati valutati tramite confronto dei dati ottenuti mdeiante la registrazione dei movimenti oculari con metoica IROG nel pre e nel post- operatorio.
SMART MORPHING CONCEPTS AND APPLICATIONS FOR ADVANCED LIFTING SURFACES
Creators: name: Barbarino, Silvestro
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2009

description: The aim of this thesis has been the study and implementation of structural solutions for the local or global change of airplanes wing geometry (adaptive wing): they may lead to an increase in aerodynamic efficiency and reduced operating costs and maintenance, as well as the structural complexity through the use of "smart" materials. In particular, attention has been paid to three parameters: the formation of a dorsal bump, the trailing edge curvature and the airfoil chord. Innovative aspects of this research concern the use of “smart” materials with an high structural integration and the development of solutions in full scale for use on regional civil transportation aircrafts. Developed methodologies have been both theoretical-numerical, to simulate the thermomechanical behaviour of Shape Memory Alloys (SMA) and its integration into a Finite Element approach in commercial software, and application-experimental, with the manufacture of prototypes and tests in laboratory. Major achievements included the construction and validation in laboratory of several original morphing architectures for load-bearing surfaces. The full functionality against the requirements and a discrete numerical-experimental correlation has been demonstrated. One of the investigated solutions is based on an innovative actuator based on SMA: its use in the aeronautical field, however, is one of many possible applications. Novelty of the studies and interest shown by the industrial partner (Alenia Aeronautica) have conducted at the request of an European patent (patent pending), and further funding of such studies to proceed with industrialization of the proposed architectures (TIAS project).
A study on self-rewetting fluids for heat transfer in microgravity
Creators: name: Cecere, Anselmo
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2009

description: In a number of water alcohols solutions the surface tension is an increasing function of temperature. Such mixtures are generally referred as self-rewetting fluids because convection driven by a reverse Marangoni effect is direct from cold to hot region along liquid-vapour interface. Within two phase heat transfer device, like heat pipes, liquid condensed is spontaneously driven to the hot evaporator improving the thermal performances and increasing the maximum heat flux. The research activities focused on numerical simulation and experimental laboratory for thermal characterization of heat pipe filled with self-rewetting fluids. Measurements of thermo-physical properties, in particular surface tension, have been carried out for several binary and ternary mixtures. A comparison between heat pipe filled ordinary and self-rewetting fluids has been carried out. Flow visualization of self-rewetting fluids has been obtained using optical diagnostic systems.
Dealing with Uncertainties in the Assessment of Existing RC Buildings
Creators: name: Elefante, Ludovica
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2009

description: From a literature review it has been possible to point out, starting from Greek and Latin literature references, the development of at least 160 catastrophic seismic events in the Mediterranean area in the last two century. Studies and researches have shown that about 60% of such events have been recorded in Italy as well as more than 50% of the recorded damages. This data can be ascribed to the high intensity of the recorded earthquakes in Italy, but also to both the high density of population and the presence of many structures under-designed or designed following old codes and construction practice: for this reasons the seismic risk in Italy is very high. In fact, the seismic risk is defined by the convolution of three terms: hazard vulnerability and exposure. The hazard is linked to the probability that, in the analyzed area, a seismic event occurs in a given period of time. The vulnerability, also known as fragility, is related to the propensity of people and goods to be injured or damaged during a seismic event. The exposure is rather closely related to the aftermath analysis of a seismic event and in particular to location, consistency, quality and value of goods and activities on the territory that may be affected directly or indirectly from the event of earthquake. Moreover by analysing the data provided by the 14th census of population and buildings (2001) in Italy, it is possible to have a clear idea regarding the period of construction of the existing reinforced concrete buildings; such data show that about one million of building units (35%) have been built before the first code with seismic provisions, Legge 2/2/74 n.64 [1], was issued. As a result a significant portion of the total seismic risk in Italy, evaluated in economic terms, comes from the various type of damages endured by the existing buildings. This is the case for several other European countries in which the average service life for buildings is larger than that of countries like the United States. Therefore, management of existing building stock is a major concern in such regions. This is the reason why, more recent European seismic guidelines (e.g., EC8 [2], OPCM [3], NTC [4]) pay particular attention to seismic assessment of existing structures, which is distinguished from that of the new construction by lack of information about both the original features and the current state of building in consideration. The assessment of existing structures is subjected to numerous sources of uncertainty.
A Refined Model of Convectively-Driven Flicker in Kepler Light Curves
Creators: name: Van Kooten, Samuel J.
name: Anders, Evan H.
name: Cranmer, Steven R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Light curves produced by the Kepler mission demonstrate stochastic brightness fluctuations (or "flicker") of stellar origin which contribute to the noise floor, limiting the sensitivity of exoplanet detection and characterization methods. In stars with surface convection, the primary driver of these variations on short (sub-eight-hour) timescales is believed to be convective granulation. In this work, we improve existing models of this granular flicker amplitude, or $F_8$, by including the effect of the Kepler bandpass on measured flicker, by incorporating metallicity in determining convective Mach numbers, and by using scaling relations from a wider set of numerical simulations. To motivate and validate these changes, we use a recent database of convective flicker measurements in Kepler stars, which allows us to more fully detail the remaining model--prediction error. Our model improvements reduce the typical misprediction of flicker amplitude from a factor of 2.5 to 2. We rule out rotation period and strong magnetic activity as possible explanations for the remaining model error, and we show that binary companions may affect convective flicker. We also introduce an "envelope" model which predicts a range of flicker amplitudes for any one star to account for some of the spread in numerical simulations, and we find that this range covers 78% of observed stars. We note that the solar granular flicker amplitude is lower than most Sun-like stars. This improved model of convective flicker amplitude can better characterize this source of noise in exoplanet studies as well as better inform models and simulations of stellar granulation.
description: Accepted for publication in the Astrophysical Journal. 23 pages, 12 figures. Code and data available at https://doi.org/10.5281/zenodo.4444282
Search for active neutrino disappearance using neutral-current interactions in the MINOS long-baseline experiment
Creators: name: Adamson, P.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We report the first detailed comparisons of the rates and spectra of neutral-current neutrino interactions at two widely separated locations. A depletion in the rate at the far site would indicate mixing between muon neutirnos and a sterile particle. No anomalous depletion in the reconstructed energy spectrum is observed. Assuming oscillations occur at a single mass-squared splitting, a fit to the neutral- and charged-current energy spectra limits the fraction of muon neutrino oscillating to a sterile neutrino to be below 0.68 at 90% confidence level. A less stringent limit due to a possible contribution to the measured neutral-current event rate at the far site from electron neutrino appearance at the current experimental limit is also presented.
description: 5 pages, 3 figures
NPE: An FPGA-based Overlay Processor for Natural Language Processing
Creators: name: Khan, Hamza
name: Khan, Asma
name: Khan, Zainab
name: Huang, Lun Bin
name: Wang, Kun
name: He, Lei
Publisher: name: arXiv
Year: 2021
Subjects: subject: Hardware Architecture (cs.AR)
subject: FOS: Computer and information sciences

description: In recent years, transformer-based models have shown state-of-the-art results for Natural Language Processing (NLP). In particular, the introduction of the BERT language model brought with it breakthroughs in tasks such as question answering and natural language inference, advancing applications that allow humans to interact naturally with embedded devices. FPGA-based overlay processors have been shown as effective solutions for edge image and video processing applications, which mostly rely on low precision linear matrix operations. In contrast, transformer-based NLP techniques employ a variety of higher precision nonlinear operations with significantly higher frequency. We present NPE, an FPGA-based overlay processor that can efficiently execute a variety of NLP models. NPE offers software-like programmability to the end user and, unlike FPGA designs that implement specialized accelerators for each nonlinear function, can be upgraded for future NLP models without requiring reconfiguration. We demonstrate that NPE can meet real-time conversational AI latency targets for the BERT language model with $4\times$ lower power than CPUs and $6\times$ lower power than GPUs. We also show NPE uses $3\times$ fewer FPGA resources relative to comparable BERT network-specific accelerators in the literature. NPE provides a cost-effective and power-efficient FPGA-based solution for Natural Language Processing at the edge.
description: 11 pages, 6 figures
A nuclear magnetic resonance study of poly(ether ether ketone) and poly(polyphenylene sulfide)
Creators: name: Clark, Jane N.
Publisher: name: University of British Columbia
Year: 2010

description: Poly(ether ether ketone), PEEK, and poly(phenylene sulfide), PPS, are both polymers of commercial importance on account of their application as matrix materials for composites. Amorphous and crystalline forms of both plastics have been studied by nuclear magnetic resonance spectroscopy: high resolution ¹³C CP/MAS and wide-line PMR. The high resolution ¹³C spectra of the polymers were assigned with the aid of the dipolar dephasing technique. The width of the resonance lines of the CP/MAS spectra were seen to be proportional to the crystal-Unity of the sample, with the fully amorphous spectra being the widest. The variable-contact-time experiment for PEEK indicated that the optimum contact time for the amorphous form is shorter than that of the crystalline. Variable temperature ¹H linewidth and spin-lattice relaxation measurements were made on both the crystalline and amorphous forms of the polymers. The temperature range was ambient to 440K. The proton spectra appeared as a broad line with a narrow component superimposed. Except in the case of PPS above the T[sub g], the broad line was by far the more intense. Partially relaxed spectra below T[sub g] indicated separate relaxation times for the two components. Linewidth measurements were made on the broad line: at all temperatures the crystalline spectra were broader than the amorphous. The amorphous linewidths showed abrupt narrowing at the glass transition temperature. All samples displayed maximum relaxation times in the glass transition region. Differential scanning calorimetry was employed to complement the NMR data. The melting, glass transition and crystallization temperatures were measured by DSC. An attempt was made to correlate the results of the study with the morphology and molecular motional behaviour of the two polymers.
Desvios técnicos e produção das audiovisualidades: uma análise das relações entre linguagem e tecnologia em "Tudo que é luz desmancha no pixel"
Creators: name: Mariz, Luciano Soares
name: Cacho, Marcos Vinícius Bezerra
Publisher: name: Labfront/UEMG
Year: 2023

description: No presente artigo propomos uma abordagem estético-filosófica que teve por base identificar e compreender a relação existente entre a linguagem audiovisual e as tecnologias a ela vinculadas em determinados períodos históricos. Para fins metodológicos, subdividimos estes momentos considerando as questões de significativa estabilidade da linguagem e da tecnologia em contraste com os pontos de tensão que resultaram em crises capazes de provocar desvios na produção e consumo das audiovisualidades de cada época. Pela potência que a pesquisa apresentou, desenvolvemos o experimento “Tudo que é luz Desmancha no Pixel”, a fim de aplicar os conhecimentos teóricos através de uma prática artística metalinguística e poética, em semelhança às primeiras gerações de videoartistas, que, segundo Rush (2006), participaram da linguagem televisiva para criticar a própria televisualidade. Destarte, desenvolvemos neste artigo, uma análise promovendo cruzamentos entre os postulados de Santoro (1989), Machado (2013) e Plaza (apud PARENTE, 1993), em paralelo com os processos criativos observados  durante o desenvolvimento desta obra-experimento.
The Kinematic design of a 3-dof Hybrid Manipulator
Creators: name: Chablat, Damien
name: Wenger, Philippe
name: Angeles, Jorge
Publisher: name: arXiv
Year: 2007
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: This paper focuses on the kinematic properties of a new three-degree-of-freedom hybrid manipulator. This manipulator is obtained by adding in series to a five-bar planar mechanism (similar to the one studied by Bajpai and Roth) a third revolute passing through the line of centers of the two actuated revolute joints of the above linkage. The resulting architecture is hybrid in that it has both serial and parallel links. Fully-parallel manipulators are known for the existence of particularly undesirable singularities (referred to as parallel singularities) where control is lost [4] and [6]. On the other hand, due to their cantilever type of kinematic arrangement, fully serial manipulators suffer from a lack of stiffness and from relatively large positioning errors. The hybrid manipulator studied is intrinsically stiffer and more accurate. Furthermore, since all actuators are located on the first axis, the inertial effects are considerably reduced. In addition, it is shown that the special kinematic structure of our manipulator has the potential of avoiding parallel singularities by a suitable choice of the "working mode", thus leading to larger workspaces. The influence of the different structural dimensions (e.g. the link lengths) on the kinematic and mechanical properties are analysed in view of the optimal design of such hybrid manipulators.
8.9-hr Rotation in the Partly Burnt Runaway Stellar Remnant LP 40-365 (GD 492)
Creators: name: Hermes, J. J.
name: Putterman, Odelia
name: Hollands, Mark A.
name: Wilson, David J.
name: Swan, Andrew
name: Raddi, Roberto
name: Shen, Ken J.
name: Gaensicke, Boris T.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We report the detection of 8.914-hr variability in both optical and ultraviolet light curves of LP 40-365 (also known as GD 492), the prototype for a class of partly burnt runaway stars that have been ejected from a binary due to a thermonuclear supernova event. We first detected this 1.0% amplitude variation in optical photometry collected by the Transiting Exoplanet Survey Satellite. Re-analysis of observations from the Hubble Space Telescope at the TESS period and ephemeris reveal a 5.8% variation in the ultraviolet of this 9800 K stellar remnant. We propose that this 8.914-hr photometric variation reveals the current surface rotation rate of LP 40-365, and is caused by some kind of surface inhomogeneity rotating in and out of view, though a lack of observed Zeeman splitting puts an upper limit on the magnetic field of <20 kG. We explore ways in which the present rotation period can constrain progenitor scenarios if angular momentum was mostly conserved, which suggests that the survivor LP 40-365 was not the donor star but was most likely the bound remnant of a mostly disrupted white dwarf that underwent advanced burning from an underluminous (Type Iax) supernova.
description: 6 pages, 2 figures, accepted for publication in ApJ Letters
Observational Evidence for a Thick Disk of Dark Molecular Gas in the Outer Galaxy
Creators: name: Busch, Michael P.
name: Engelke, Philip D.
name: Allen, Ronald J.
name: Hogg, David E.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present the serendipitous discovery of an extremely broad ($ΔV_{LSR} \sim 150$ km/s), faint ($T_{mb} < 10 \textrm{mK}$), and ubiquitous 1667 and 1665 MHz ground-state thermal OH emission towards the 2nd quadrant of the outer Galaxy ($R_{gal}$ > 8 kpc) with the Green Bank Telescope. Originally discovered in 2015, we describe the redundant experimental, observational, and data quality tests of this result over the last five years. The longitude-velocity distribution of the emission unambiguously suggests large-scale Galactic structure. We observe a smooth distribution of OH in radial velocity that is morphologically similar to the HI radial velocity distribution in the outer Galaxy, showing that molecular gas is significantly more extended in the outer Galaxy than previously expected. Our results imply the existence of a thick ($-200< z < 200$ pc) disk of diffuse ($n_{H_{2}}$ $\sim$ 5 $\times$ 10$^{-3}$ cm$^{-3}$) molecular gas in the Outer Galaxy previously undetected in all-sky CO surveys.
description: 14 pages, 6 figures, accepted to ApJ
Experimental Falsification of Leggett's Non-Local Variable Model
Creators: name: Branciard, Cyril
name: Ling, Alexander
name: Gisin, Nicolas
name: Kurtsiefer, Christian
name: Lamas-Linares, Antia
name: Scarani, Valerio
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Bell's theorem guarantees that no model based on local variables can reproduce quantum correlations. Also some models based on non-local variables, if subject to apparently "reasonable" constraints, may fail to reproduce quantum physics. In this paper, we introduce a family of inequalities, which allow testing Leggett's non-local model versus quantum physics, and which can be tested in an experiment without additional assumptions. Our experimental data falsify Leggett's model and are in agreement with quantum predictions.
description: 5 pages, 3 figures, 1 table
Neutrino transport with Monte Carlo method: II. Quantum Kinetic Equations
Creators: name: Kato, Chinami
name: Nagakura, Hiroki
name: Morinaga, Taiki
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Neutrinos have an unique quantum feature as flavor conversions. Recent studies suggested that collective neutrino oscillations play important roles in high-energy astrophysical phenomena. Quantum kinetic equation (QKE) is capable of describing the neutrino flavor conversion, transport and matter collision self-consistently. However, we have experienced many technical difficulties in their numerical implementation. In this paper, we present a new QKE solver based on Monte Carlo (MC) approach. This is an upgraded version of our classical MC neutrino transport solver; in essence, a flavor degree of freedom including mixing state is added into each MC particle. This extension requires updating numerical treatments of collision terms, in particular for scattering processes. We deal with the technical problem by generating a new MC particle at each scattering event. To reduce statistical noise inherent in MC methods, we develop the effective mean free path method. This suppresses a sudden change of flavor state due to collisions without increasing the number of MC particles. We present a suite of code tests to validate these new modules with comparing to the results reported in previous studies. Our QKE-MC solver is developed with fundamentally different philosophy and design from other deterministic- and mesh methods, suggesting that it will be complementary to others, and potentially provide new insights into physical processes of neutrino dynamics.
description: 22 pages, 21 figures, Submitted to ApJS, we made minor revisions for V2 and V3
Nonlinear Dynamics of Gravity Wave Driven Flows in the Solar Radiative Interior
Creators: name: Rogers, T. M.
name: MacGregor, K. B.
name: Glatzmaier, G. A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present results of nonlinear numerical simulations of gravity wave driven shear flow oscillations in the equatorial plane of the solar radiative interior. These results show that many of the assumptions of quasi-linear theory are not valid. When only two waves are forced (prograde and retrograde) oscillatory mean flow is maintained; but critical layers often form and are dynamically important. When a spectrum of waves is forced, the non-linear wave-wave interactions are dynamically important, often acting to decrease the maintenance of a mean flow. The (in)coherence of such wave-wave interactions must be taken into account when describing wave driven mean flows.
description: 21 pages, 10 figures, accepted to MNRAS animations can be found at http://www.solarphysicist.com
Definition sets for the Direct Kinematics of Parallel Manipulators
Creators: name: Wenger, Philippe
name: Chablat, Damien
Publisher: name: arXiv
Year: 2007
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: The aim of this paper is to characterize the uniqueness domains in the workspace of parallel manipulators, as well as their image in the joint space. The notion of aspect introduced for serial manipulators in [Borrel 86] is redefined for such parallel manipulators. Then, it is shown that it is possible to link several solutions to the direct kinematic problem without meeting a singularity, thus meaning that the aspects are not uniqueness domains. Additional surfaces are characterized in the workspace which yield new uniqueness domains. An octree model of spaces is used to compute the joint space, the workspace and all other newly defined sets. This study is illustrated all along the paper with a 3-RPR planar parallel manipulator.
Particle creation in the presence of a warped extra dimension
Creators: name: Ghosh, Suman
name: Kar, Sayan
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Particle creation in spacetimes with a warped extra dimension is studied. In particular, we investigate the dynamics of a conformally coupled, massless scalar field in a five dimensional warped geometry where the induced metric on the 3--branes is that of a spatially flat cosmological model. We look at situations where the scale of the extra dimension is assumed (i) to be time independent or (ii) to have specific functional forms for time dependence. The warp factor is chosen to be that of the Randall--Sundrum model. With particular choices for the functional form of the scale factor (and also the function characterising the time evolution of the extra dimension) we obtain the ${| β_k|}^2$, the particle number and energy densities after solving (wherever possible, analytically but, otherwise, numerically) the conformal scalar field equations. The behaviour of these quantities for the massless and massive Kaluza--Klein modes are examined. Our results show the effect of a warped extra dimension on particle creation and illustrate how the nature of particle production on the brane depends on the nature of warping, type of cosmological evolution as well as the temporal evolution of the extra dimension.
description: 21 pages, 10 figures, minor corrections, new references added, version to appear in JCAP
Emission Lines in X-ray Spectra of Clusters of Galaxies
Creators: name: Tozzi, Paolo
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Emission lines in X-ray spectra of clusters of galaxies reveal the presence of heavy elements in the diffuse hot plasma (the Intra Cluster Medium, or ICM) in virial equilibrium in the dark matter potential well. The relatively simple physical state of the ICM allows us to estimate, with good accuracy, its thermodynamical properties and chemical abundances. These measures put strong constraints on the interaction processes between the galaxies and the surrounding medium, and have significant impact on models of galaxy formation as well. This field is rapidly evolving thanks to the X-ray satellites Chandra and XMM-Newton. Among the most relevant progresses in the last years, we briefly discuss the nature of cool cores and the measure of the Iron abundance in high redshift clusters. Future X-ray missions with bolometers promise to provide a substantial step forward to a more comprehensive understanding of the complex physics of the ICM.
description: 8 pages, 3 figures, Proceedings of the VI Serbian Conference on Spectral Line Shapes in Astrophysics, Sremski Karlovci, Serbia June 11-15 2007