cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Algeria's Agricultural Economy in Brief
Creators: name: Missiaen, Margaret
name: Missiaen, Margaret
Publisher: name: Unknown
Year: 1970
Subjects: subject: Agricultural and Food Policy
subject: Crop Production/Industries
subject: International Relations/Trade
subject: Land Economics/Use
subject: Livestock Production/Industries
subject: North Africa
subject: Algeria
subject: Agricultural production
subject: Agricultural trade
subject: Agricultural statistics

description: The agricultural sector of the Algerian economy contributes an average of 10-12 percent of gross domestic product. While the most important food crops are wheat and barley, wine is the largest agricultural export. The war for independence and wine-marketing difficulties have caused setbacks in the economy of the country, but increasing petroleum production has offset these problems to some degree.
Comparing and Combining Methods for Automatic Query Expansion
Creators: name: Pérez-Agüera, José R.
name: Araujo, Lourdes
Publisher: name: arXiv
Year: 2008
Subjects: subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: Query expansion is a well known method to improve the performance of information retrieval systems. In this work we have tested different approaches to extract the candidate query terms from the top ranked documents returned by the first-pass retrieval. One of them is the cooccurrence approach, based on measures of cooccurrence of the candidate and the query terms in the retrieved documents. The other one, the probabilistic approach, is based on the probability distribution of terms in the collection and in the top ranked set. We compare the retrieval improvement achieved by expanding the query with terms obtained with different methods belonging to both approaches. Besides, we have developed a naïve combination of both kinds of method, with which we have obtained results that improve those obtained with any of them separately. This result confirms that the information provided by each approach is of a different nature and, therefore, can be used in a combined manner.
description: 12 pages
D2.3 Online survey report
Creators: name: Brooks, Laurence
name: Stahl, Bernd
name: Nitika Bhalla
name: Tilimbe Jiya
Publisher: name: De Montfort University
Year: 2021
Subjects: subject: Information Systems
subject: FOS: Computer and information sciences
subject: 109999 Technology not elsewhere classified
subject: FOS: Other engineering and technologies

description: Based around the existing outcomes from the SHERPA project so far, and as encapsulated in the online workbook, this online survey aimed to explore the research question, “From the perspective of a well-informed lay public, which ethical and human rights issues relating to SIS are perceived as particularly problematic and how should they be addressed?” Overall, the results show very broad agreement with the SHERPA findings so far.
Silicate dielectric ceramics for millimetre wave applications
Creators: name: Kamutzki, Franz
name: Schneider, Sven
name: Barowski, Jan
name: Gurlo, Aleksander
name: Hanaor, Dorian A. H.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Silicate ceramics are of considerable promise as high frequency dielectrics in emerging millimetre wave applications including high bandwidth wireless communication and sensing. In this review, we show how high quality factors and low, thermally stable permittivities arise in ordered silicate structures. On the basis of a large number of existing studies, the dielectric performance of silicate ceramics is comprehensively summarized and presented, showing how microstructure and SiO4 tetrahedral connectivity affect polarizability and dielectric losses. We critically examine the appropriateness of silicate materials in future applications as effective millimetre wave dielectrics with low losses and tuneable permittivities. The development of new soft chemistry based processing routes for silicate dielectric ceramics is identified as being instrumental towards the reduction of processing temperatures, thus enabling silicate ceramics to be co-fired in the production of components functioning in the mm wave regime.
No Way Back: Maximizing survival time below the Schwarzschild event horizon
Creators: name: Lewis, Geraint F.
name: Kwan, Juliana
Publisher: name: arXiv
Year: 2007
Subjects: subject: Physics Education (physics.ed-ph)
subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: It has long been known that once you cross the event horizon of a black hole, your destiny lies at the central singularity, irrespective of what you do. Furthermore, your demise will occur in a finite amount of proper time. In this paper, the use of rockets in extending the amount of time before the collision with the central singularity is examined. In general, the use of such rockets can increase your remaining time, but only up to a maximum value; this is at odds with the ``more you struggle, the less time you have'' statement that is sometimes discussed in relation to black holes. The derived equations are simple to solve numerically and the framework can be employed as a teaching tool for general relativity.
description: 7-pages, 5 figures, accepted for publication in the Publications of the Astronomical Society of Australia (Journal name corrected.)
Establishing the nature of companion candidates to X-ray emitting late B-type stars
Creators: name: Hubrig, S.
name: Marco, O.
name: Stelzer, B.
name: Schoeller, M.
name: Huelamo, N.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The most favored interpretation for the detection of X-ray emission from late B-type stars is that these stars have a yet undiscovered late-type companion (or an unbound nearby late-type star) that produces the X-rays. Several faint IR objects at (sub)-arcsecond separation from B-type stars have been uncovered in our earlier adaptive optics imaging observations, and some of them have been followed up with the high spatial resolution of the Chandra X-ray observatory, pinpointing the X-ray emitter. However, firm conclusions on their nature requires a search for spectroscopic signatures of youth. Here we report on our recent ISAAC observations carried out in low resolution spectroscopic mode. Equivalent widths have been used to obtain information on spectral types of the companions. All eight X-ray emitting systems with late B-type primaries studied contain dwarf like companions with spectral types later than A7. The only system in the sample where the companion turns out to be of early spectral type is not an X-ray source. These results are consistent with the assumption that the observed X-ray emission from late B-type stars is produced by an active pre-main sequence companion star.
description: 6 pages, 2 figures, 3 tables, accepted for publication in MNRAS
Higher dimensional Hermitian Gray manifolds
Creators: name: Jelonek, Wlodzimierz
Publisher: name: arXiv
Year: 2008
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53C25, 53C55

description: The aim of this paper is to describe a large class of Hermitian Gray manifolds.
description: 23 pages
QUEACO: Borrowing Treasures from Weakly-labeled Behavior Data for Query Attribute Value Extraction
Creators: name: Zhang, Danqing
name: Li, Zheng
name: Cao, Tianyu
name: Luo, Chen
name: Wu, Tony
name: Lu, Hanqing
name: Song, Yiwei
name: Yin, Bing
name: Zhao, Tuo
name: Yang, Qiang
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computation and Language (cs.CL)
subject: Artificial Intelligence (cs.AI)
subject: Information Retrieval (cs.IR)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: We study the problem of query attribute value extraction, which aims to identify named entities from user queries as diverse surface form attribute values and afterward transform them into formally canonical forms. Such a problem consists of two phases: {named entity recognition (NER)} and {attribute value normalization (AVN)}. However, existing works only focus on the NER phase but neglect equally important AVN. To bridge this gap, this paper proposes a unified query attribute value extraction system in e-commerce search named QUEACO, which involves both two phases. Moreover, by leveraging large-scale weakly-labeled behavior data, we further improve the extraction performance with less supervision cost. Specifically, for the NER phase, QUEACO adopts a novel teacher-student network, where a teacher network that is trained on the strongly-labeled data generates pseudo-labels to refine the weakly-labeled data for training a student network. Meanwhile, the teacher network can be dynamically adapted by the feedback of the student's performance on strongly-labeled data to maximally denoise the noisy supervisions from the weak labels. For the AVN phase, we also leverage the weakly-labeled query-to-attribute behavior data to normalize surface form attribute values from queries into canonical forms from products. Extensive experiments on a real-world large-scale E-commerce dataset demonstrate the effectiveness of QUEACO.
description: The 30th ACM International Conference on Information and Knowledge Management (CIKM 2021, Applied Research Track)
Dichotomy of saddle points in energy bands of a monolayer NbSe$_2$
Creators: name: Kim, Sejoong
name: Son, Young-Woo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We theoretically show that two distinctive spin textures manifest themselves around saddle points of energy bands in a monolayer NbSe$_2$ under external gate potentials. While the density of states at all saddle points diverge logarithmically, ones at the zone boundaries display a windmill-shaped spin texture while the others unidirectional spin orientations. The disparate spin-resolved states are demonstrated to contribute an intrinsic spin Hall conductivity significantly while their characteristics differ from each other.Based on a minimal but essential tight-binding approximation reproducing first-principles computation results, we established distinct effective Rashba Hamiltonians for each saddle point, realizing the unique spin textures depending on their momentum. Energetic positions of the saddle points in a single layer NbSe$_2$ are shown to be well controlled by a gate potential so that it could be a prototypical system to test a competition between various collective phenomena triggered by diverging density of states and their spin textures in low-dimension.
Sviluppo di materiali polimerici e delle loro relative tecnologie di trasformazione per la loro integrazione nella realizzazione di microdispositivi elettronici
Creators: name: De Simone, Luigi
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2006

description: Obiettivo del presente lavoro di tesi è stato l’individuazione e la caratterizzazione di substrati polimerici, alternativi ai convenzionali substrati vetrosi, per la realizzazione di microdispositivi elettronici mediante la tecnologia Polysilicon che si basa sull’utilizzo di materiali semiconduttori a film sottile di silicio policristallino depositati a basse temperature. La riduzione dei costi, del peso e la maggiore robustezza meccanica sono tra i principali vantaggi previsti dall’utilizzo di substrati plastici. Due differenti materiali sono stati investigati: PET e AryLite™. Per ogni polimero si è proceduto ad una caratterizzazione completa, sia calorimetrica che meccanica, ed alla messa a punto di un trattamento di stabilizzazione dimensionale. Film sottili di silicio amorfo idrogenato sono stati successivamente depositati sui substrati selezionati; il processo di deposizione è stato ottimizzato. Si è proceduto, quindi, alla cristallizzazione dei suddetti film mediante irradiazione con laser ad eccimeri. Per preservare il substrato polimerico dalla degradazione termica, uno strato di ossido di silicio è stato depositato tra lo strato semiconduttivo e il supporto plastico. Un’analisi statica e dinamica agli Elementi Finiti è stata, infine, effettuata al fine di simulare la risposta della struttura a sandwich in risposta all’applicazione di diversi carichi. Diverse iterazioni sono state eseguite al fine di determinare un comportamento rappresentativo del dispositivo.
A minimal model for kinetic arrest
Creators: name: Pal, Prasanta
name: O'Hern, Corey S.
name: Blawzdziewicz, Jerzy
name: Stinchcombe, Robin
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: To elucidate slow dynamics in glassy materials, we introduce the {\it Figure-8 model} in which $N$ hard blocks undergo Brownian motion around a circuit in the shape of a figure-8. This system undergoes kinetic arrest at a critical packing fraction $ϕ=ϕ_g < 1$, and for $ϕ\approxϕ_g$ long-time diffusion is controlled by rare, cooperative `junction-crossing' particle rearrangements. We find that the average time between junction crossings $τ_{JC}$, and hence the structural relaxation time, does not simply scale with the configurational volume $\OmegaLow$ of transition states, because $τ_{JC}$ also depends on the time to complete a junction crossing. The importance of these results in understanding cage-breaking dynamics in glassy systems is discussed.
description: 4 pages, 4 figures
Statistical switching kinetics in ferroelectrics
Creators: name: Lou, X. J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: By assuming a more realistic nucleation and polarization reversal scenario we build a new statistical switching model for ferroelectrics, which is different from either the Kolmogorov-Avrami-Ishibashi (KAI) model or the Nucleation-Limited-Switching (NLS) model. After incorporating a time-dependent depolarization field this model gives a good description about the retardation behavior in polycrystalline thin films at medium or low fields, which can not be described by the traditional KAI model. This model predicts correctly n=1 for polycrystalline thin films at high Eappl or ceramic bulks in the ideal case.
D3.2 Guidelines for the development and the use of SIS
Creators: name: Macnish, Kevin
name: Ryan, Mark
name: Lundgren, Björn
Publisher: name: De Montfort University
Year: 2020
Subjects: subject: 109999 Technology not elsewhere classified
subject: FOS: Other engineering and technologies

description: This report contains two sets of ethical guidelines – one for the technological development and one for the use – of artificial intelligence and big data systems, a glossary, two annexes, and a list of references. It is a deliverable of the SHERPA project, an EU Horizon 2020 project on the ethical and human rights implications of AI and big data. The guidelines differ from other existing guidelines in that they are directly related to design and development practices. They are intended to be actionable guidelines for systems and software development and use respectively, rather than abstract principles that have no direct application in practice. We call such guidelines operational, meaning ready for use.
D1.4 Report on Ethical Tensions and Social Impacts
Creators: name: Ryan, Mark
name: Macnish, Kevin
Publisher: name: De Montfort University
Year: 2019
Subjects: subject: 109999 Technology not elsewhere classified
subject: FOS: Other engineering and technologies

description: The Deliverable examines ethical tensions in the use of SIS in a pragmatic and comprehensive way, beginning with ethical issues related to the actual design of the technologies themselves. Whether or not there are inherent issues with their functioning, capacities, and programming (sections 2 and 5). The document then identifies the main ethical issues within the debate for the use of SIS in practice, outlining 24 of the key ethical concerns found within the literature (section 4). While the technologies themselves, and their use, raise important concerns that need to be addressed, it is important to not overlook specific domain applications and fields of practice, which is reviewed in section 6 of this report.
The Deliverable will also give a thorough analysis of the main ethical issues related to research & innovation aspects of SIS development (section 7). The report will subsequently finish with a detailed analysis of the main ethical issues and possible solutions within the report (section 8), in an attempt to identify, allocate, and group such a wide body of information into the most prevalent concerns for society today.
Terahertz Metamaterials with Semiconductor Split-Ring Resonators for Magnetostatic Tunability
Creators: name: Han, Jiaguang
name: Lakhtakia, Akhlesh
name: Qiu, Cheng-Wei
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Other Condensed Matter (cond-mat.other)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We studied a metasurface constituted as a periodic array of semiconductor split-ring resonators. The resonance frequencies of the metasurface excited by normally incident light were found to be continuously tunable in the terahertz regime through an external magnetostatic field of suitable orientation. As such metasurfaces can be assembled into 3D metamaterials, the foregoing conclusion also applies to metamaterials comprising semiconductor split-ring resonators.
description: 7 pages, 5 figures
Role of saturated and unsaturated zones in soil disposal of septic tank effluent
Creators: name: Johnson, Kenneth Robert
Publisher: name: University of British Columbia
Year: 2010

description: The guidelines in British Columbia for the use of the septic tank-soil absorption system (ST-SAS) are very specific in regard to the separation distances between the ground surface and the groundwater table (minimum 1.2 metres), and between the tile field and perimeter drains or ditches (minimum 3.0 metres). A pilot scale experiment utilizing simulated sections of a septic tile field, with zones of saturated and unsaturated soil, was used to evaluate the scientific basis for these guidelines. Septic tank effluent was applied to depths of unsaturated soil, which varied from 0.91 metres (3 feet) to 0.00 metres, at the inlet end of a saturated zone. Samples were taken at distances of 0.61 metres (2 feet), 1.67 metres (5.5 feet), and 2.74 metres (9 feet) in the saturated zone. Measurements were made of total and fecal conforms, chemical oxygen demand, ammonia, nitrate and orthophosphate. Continuous operation of the sections produced effluent with total coliforms generally less than 400 coliforms/100 mL, and fecal coliforms generally less than 200 coliforms/100 mL. Varying degrees of nitrification occurred in the unsaturated zones resulting in relatively high concentrations of nitrate in some of the sections. The removal of orthophosphate was greater than 90 percent in all of the sections,and the removal of nitrogen varied from 25 to 90 percent. Reductions in measured influent parameters were substantial in all of the sections. This supports the 1.2 metre separation distance in the guidelines, and suggests that 3.0 metre horizontal separation may be conservative in some cases. Of concern were the high nitrate values observed in some of the sections, which may require consideration of nitrification potential in some soils.
HerrCompBioinfo: un recurso educativo de código abierto de herramientas computacionales para entusiastas de la Bioinformática
Creators: name: Ruano, Sebastián Ayala
name: Zurita, Juan Esteban
Publisher: name: Zenodo
Year: 2021
Subjects: Bioinformática
Educación
Bash
Git
GitHub
AWK
SAM Tools
regex

description: HerrCompBioinfo es un recurso educativo de código abierto de herramientas computacionales para entusiastas de la Bioinformática escrito en español. Con este recurso esperamos que nuestros usuarios pueden desarrollar habilidades importantes para comenzar sus carreras en Bioinformática, a pesar de las posibles barreras del idioma. Presentamos este recurso como un libro electrónico al que puede acceder con este enlace. Además, en este repositorio de GitHub se desarrollan, revisan y mantienen todos los componentes del proyecto. A continuación se presentan los contenidos de esta versión: Introducción a Unix y GNU/Linux Jupyter Lab Manejo terminal Procesamiento de ficheros, regex y pipes Ejercicios de procesamiento ficheros con enfoque en Bioinformática Comando Make para instalar programas SAM Tools: conjunto de programas útiles en Bioinformática AWK: lenguaje de programación para procesamiento de archivos de texto Bash como lenguaje de programación Git y GitHub Esperamos continuar trabajando en el desarrollo de este recurso con la ayuda de la comunidad. Si estás interesado en colaborar, en este enlace puedes encontrar las formas de cómo colaborar y ser parte de esta iniciativa.
Matter density perturbations and effective gravitational constant in modified gravity models of dark energy
Creators: name: Tsujikawa, Shinji
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We derive the equation of matter density perturbations on sub-horizon scales for a general Lagrangian density f(R, phi, X) that is a function of a Ricci scalar R, a scalar field phi and a kinetic term X=-(nabla phi)^2/2. This is useful to constrain modified gravity dark energy models from observations of large-scale structure and weak lensing. We obtain the solutions for the matter perturbation delta_m as well as the gravitational potential Phi for some analytically solvable models. In a f(R) dark energy model with the Lagrangian density f(R)=alpha R^{1+m}-Lambda, the growth rates of perturbations exhibit notable differences from those in the standard Einstein gravity unless m is very close to 0. In scalar-tensor models with the Lagrangian density f=F(phi)R+2p(phi,X) we relate the models with coupled dark energy scenarios in the Einstein frame and reproduce the equations of perturbations known in the current literature by making a conformal transformation. We also estimate the evolution of perturbations in both Jordan and Einstein frames when the energy fraction of dark energy is constant during the matter-dominated epoch.
description: 11 pages, no figures, typos are corrected, version to appear in Physical Review D
D1.2 SIS scenarios
Creators: name: Wright, David
Publisher: name: De Montfort University
Year: 2020
Subjects: subject: 109999 Technology not elsewhere classified
subject: FOS: Other engineering and technologies

description: This deliverable considers the ethical, legal (data protection), social and economic impacts of new and emerging technologies, powered by artificial intelligence (AI) and big data, which we call smart information systems (SIS). In this deliverable, we look forward to the year 2025 to consider how new and emerging technologies may raise various issues, regarding which policymakers and other stakeholders should consider what ethical guidelines, data protection policies and other measures we might need to address the issues now rather than five or six years from now when they may have fewer policy options. We have developed five scenarios, addressing five different technology clusters in five different areas – social care for senior citizens, information warfare, predictive policing, driverless cars and learning buddy robots. We engaged stakeholders in the development of these scenarios. Stakeholder engagement was an important purpose of the scenario construction process. In short, the scenarios are a way of exploring with stakeholders the issues raised by these advanced new technologies and developing recommendations for policymakers for dealing with those issues. This deliverable comprises this executive summary, an introduction, the five scenarios, and conclusions and recommendations.
Enhance synchronizability via age-based coupling
Creators: name: Lu, Yu-Feng
name: Zhao, Ming
name: Zhou, Tao
name: Wang, Bing-Hong
Publisher: name: arXiv
Year: 2007
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: In this brief report, we study the synchronization of growing scale-free networks. An asymmetrical age-based coupling method is proposed with only one free parameter $α$. Although the coupling matrix is asymmetric, our coupling method could guarantee that all the eigenvalues are non-negative reals. The eigneratio R will approach to 1 in the large limit of $α$.
description: 3 pages, 1 figure
INVESTITSION KREDIT MUNOSABATLARI VA ULARNING IQTISODIYOTNING RIVOJLANISHDAGI RO'LI
Creators: name: Musaxanova, Aziza
Publisher: name: Zenodo
Year: 2024

description: Investitsion kredit munosabatlari, iqtisodiyotni rivojlantirishda muhim ahamiyatga ega bo‘lib, ular mamlakatning moliyaviy barqarorligini ta’minlash, yangi loyihalarni amalga oshirish va iqtisodiy o‘sishni rag‘batlantirishda asosiy rol o‘ynaydi. Ushbu munosabatlar banklar, moliya institutlari va tadbirkorlar o‘rtasida o‘zaro aloqalarni tashkil etadi. Investitsion kreditlar, o‘z navbatida, innovatsion texnologiyalarni joriy etish, infratuzilmani rivojlantirish va ishlab chiqarishni kengaytirishga yordam beradi. Iqtisodiyotni barqarorlashtirish va modernizatsiya qilish jarayonlarida investitsion kreditlarning roli hamda ularning iqtisodiy rivojlanishdagi ahamiyati yanada ortib bormoqda. Ushbu maqolada investitsion kredit munosabatlarining nazariy asoslari, ularning iqtisodiyotga ta’siri va amaliy misollar orqali o‘rganiladi.
Multilevel parallel-in-time methods for advection-dominated PDEs
Creators: name: KRZYSIK, OLIVER ANDREW
Publisher: name: Monash University
Year: 2021
Subjects: subject: 10399 Numerical and Computational Mathematics not elsewhere classified
subject: FOS: Mathematics

description: The predictions arising from the numerical simulation of partial differential equations are used throughout many areas of science. I present, design, and analyse new algorithms for the numerical simulation of partial differential equations that describe time-dependent phenomena, such as those that govern the conduction of electricity through a wire, or that describe the airflow across an airplane wing, for example. For the specific types of equations that I consider, my new algorithms enable these equations to be simulated faster and more efficiently than with existing approaches.
Anisotropic heating and magnetic field generation due to Raman scattering in laser-plasma interactions
Creators: name: Silva, Thales
name: Schoeffler, Kevin
name: Vieira, Jorge
name: Hoshino, Masahiro
name: Fonseca, Ricardo
name: Silva, Luis O.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: We identify a mechanism for magnetic field generation in the interaction of intense electromagnetic waves and underdense plasmas. We show that Raman scattered plasma waves trap and heat the electrons preferentially in their propagation direction, resulting in a temperature anisotropy. In the trail of the laser pulse, we observe magnetic field growth which matches the Weibel mechanism due to the temperature anisotropy. We discuss the role of the initial electron temperature in our results. The predictions are confirmed with multi-dimensional particle-in-cell simulations. We show how this configuration is an experimental platform to study the long-time evolution of the Weibel instability.
An Experimentally accessible geometric measure for entanglement in $N$-qubit pure states
Creators: name: Hassan, Ali Saif M.
name: Joag, Pramod S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present a multipartite entanglement measure for $N$-qubit pure states, using the norm of the correlation tensor which occurs in the Bloch representation of the state. We compute this measure for several important classes of $N$-qubit pure states such as GHZ states, W states and their superpositions. We compute this measure for interesting applications like one dimensional Heisenberg antiferromagnet. We use this measure to follow the entanglement dynamics of Grover's algorithm. We prove that this measure possesses almost all the properties expected of a good entanglement measure, including monotonicity. Finally, we extend this measure to $N$-qubit mixed states via convex roof construction and establish its various properties, including its monotonicity. We also introduce a related measure which has all properties of the above measure and is also additive.
description: 23 pages, 6 figures, presented in part at ISCQI (Bhubaneswar, India), comments are welcome
The Local Void is Really Empty
Creators: name: Tully, R. Brent
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Are voids in the distribution of galaxies only places with reduced matter density and low star formation efficiency or are they empty of matter? There is now compelling evidence of expansion away from the Local Void at very high velocities. The motion is most reasonably interpreted as an evacuation of the void, which requires that the void be very large and very empty.
description: Proceedings IAU Symp. 244: Dark Galaxies and Lost Baryons. Cardiff, 25-29 June, 2007. 6 pages, 5 figures
Computer aided cost estimation of steel structures a case study of operational approach
Creators: name: Shing, W.Y. Albert
Publisher: name: University of British Columbia
Year: 2010

description: An arrangement has been set up between the University of British Columbia and an industrial firm ,Coast Steel Fabricators, to investigate the topic of computer cost estimation of steel structures. The objective of this research is to computerize the current cost estimating process of Coast Steel Fabricators and investigate a method of generating the labour hour variables used by the estimating program. This research has made the following contributions: A computer estimating program was developed using the operational approach and a method was investigated to generate the labour hour variables required by the computer estimating program. The unique arrangement between this study and the industrial firm has proven to be successful. Coast Steel Fabricators updrated their estimating process and achieved a higher efficiency. The author was given hands-on experience and free access of the data files throughout the study. The computer cost estimating program is written in Basic and runs under the MAI-Four computer system. The program is menu-driven to allow the users to: 1. store labour hour variables; 2. enter inputs from take-offs; 3. compute the labour hours and material weights; and 4. calculate the labour cost, material cost and total cost. Coast Steel Fabricators reported that the computer cost estimating program has reduced the overall estimating time b y 30%. The labour hour variables are defined as the time for each operation. As these variables are vital to the computer estimating program, a method has been developed to obtain these variables by collecting shop data at a global level through an information system. The global shop data will then be analyzed by the technique of Multiple Linear Regression (MLR) using a spreadsheet program (Lotus 1-2-3). An optimun size of 200 observations was recommended to give a monthly average. The program is also menu-driven to allow the users to: 1. convert global shop data into piece files; 2. sort the piece file into component files; 3. perform MLR analysis on the component file to obtain the labour hour variables; and 4. plot the standard error of each labour hour variable. The labour hour variables will serve as a powerful tool for time studies in case of the start-up of a new fabrication plant and will provide feedback to the cost estimation program of an ongoing fabricator. Since the applications are written in the Basic and spreadsheet environments, programs can be easily customized for use by a number of steel fabricators.
Overstable Convective Modes in Rotating Early Type Stars
Creators: name: Lee, Umin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We calculate overstable convective (OsC) modes of $2M_\odot$, $4M_\odot$, and $20M_\odot$ main sequence stars. To compute non-adiabatic OsC modes in the core, we assume $(\nabla\cdot\vec{F}_C)^\prime=0$ as a prescription for the approximation called frozen-in convection in pulsating stars where $\vec{F}_C$ is the convective energy flux and the prime $^\prime$ indicates Eulerian perturbation. We find that the general properties of the OsC modes are roughly the same as those obtained by Lee \& Saio (2020) who assumed $δ(\nabla\cdot\vec{F}_C)=0$, except that no OsC modes behave like inertial modes when they tend toward complete stabilization with increasing rotation frequency where $δ$ indicates the Lagrangian perturbation. As the rotation frequency of the stars increases, the OsC modes are stabilized to resonantly excite $g$-modes in the envelope when the core rotates slightly faster than the envelope. The frequency of the OsC modes that excite envelope $g$-modes is approximately given by $σ\sim |mΩ_c|$ in the inertial frame and hence $σ_{m=-2}\approx2σ_{m=-1}$ where $m$ is the azimuthal wavenumber of the modes and $Ω_c$ is the rotation frequency of the core. We find that the modal properties of OsC modes do not strongly depend on the mass of the stars. We discuss angular momentum transport by OsC modes in resonance with envelope $g$-modes in the main sequence stars. We suggest that angular momentum transfer takes place from the core to the envelope and that the OsC modes may help the stars rotate uniformly and keep the rotation frequency of the core low during their evolution as main sequence stars.
description: 15 pages, 13 figures, submitted to MNRAS
Oxythrips Uzel 1895
Creators: name: Zhang, Shimeng
name: Wang, Zhaohong
name: Li, Yajin
name: Mound, Laurence
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Thysanoptera
Thripidae
Oxythrips

description: Oxythrips Uzel
Oxythrips UZel, 1895: 133.
Chilothrips Hood, 1916: 119. Syn.n.
The genus Chilothrips was erected fOr a species frOm eastern NOrth America living in the male cOnes Of Pinus trees, and subsequently twO further species frOm CalifOrnia, and fOur frOm China were added (ThripsWiki 2018). PrOblems with distinguishing this genus frOm Oxythrips, the EurOpean type species Of which alsO breeds in Pinus, were discussed by Stannard (1973), whO cOncluded that “this American genus is but a clOse side-shOOt frOm Oxythrips ”. The key tO genera Of the Anaphothrips grOup by MasumOtO and Okajima (2017) distinguished Chilothrips as having: fOre tibia with a stOut apical seta; female with mOuth cOne lOng; tergite X twice as lOng as IX. In cOntrast, Oxythrips species have: fOre tibia with a thin apical seta; female with mOuth cOne usually shOrt; tergite X usually subequal tO IX. This separatiOn is clearly nOt rObust, and is further weakened because males have a smaller mOuth cOne than females. MOreOver, females Of the cOmmOn EurOpean species, Oxythrips bicolor, anOther species frOm Pinus male cOnes, have a large stOut mOuth cOne, and tergite X is twice as lOng as tergite IX. This species cOuld equally well be placed in Chilothrips. HOwever, intersex individuals recOrded cOmmOnly in nOrthern ScOtland (MOund 1971) are interpreted as evidence that bicolor interbreeds with ajugae Uzel, the type species Of Oxythrips. These twO species are therefOre presumably clOsely related, and shOuld nOt be placed in separate genera. Studies in China (Cui et al. 2017) On Chilothrips strobilus, have indicated remarkable variatiOn in the length and shape Of tergite X within a single pOpulatiOn frOm Pinus, frOm abOut 1.2 times as lOng as basal width tO at least 3.0 times. In view Of the many character states shared by species that have been placed in these twO genera, including the shared hOst assOciatiOn with Pinus male cOnes in several species, these twO are here fOrmally synOnymized. As a result, the fOllOwing new combinations are established: Oxythrips hangzhouensis (Hu & Feng); Oxythrips jiuxiensis (Mirab-balOu, Chen & TOng); Oxythrips occidentalis (Stannard); Oxythrips pini (HOOd); Oxythrips rotrameli (Stannard); Oxythrips strobilus (TOng & Zhang); Oxythrips yamatensis (KudO).
description: Published as part of Zhang, Shimeng, Wang, Zhaohong, Li, Yajin & Mound, Laurence, 2018, One new species, two generic synonyms and eight new records of Thripidae from China (Thysanoptera), pp. 370-378 in Zootaxa 4418 (4) on page 376, DOI: 10.11646/zootaxa.4418.4.3, http://zenodo.org/record/1244922
Study of the suppressed B meson decay B^- -> D K^-, D -> K^+ π^-
Creators: name: Belle Collaboration
name: Horii, Y.
name: Trabelsi, K.
name: Yamamoto, H.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We report a study of the suppressed B meson decay B^- -> D K^- followed by D -> K^+ π^-, where D indicates a D^0 or \bar{D}^0 state. The two decay paths interfere and provide information on the CP-violating angle ϕ_3. We use a data sample containing 657 x 10^6 B\bar{B} pairs recorded at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e^+e^- storage ring. We do not find significant evidence for the mode B^- -> D K^-, D -> K^+ π^-, and set an upper limit of r_B < 0.19, where r_B is the magnitude of the ratio of amplitudes |A(B^- -> \bar{D}^0 K^-)/A(B^- -> D^0 K^-)|. The decay B^- -> D π^-, D -> K^+ π^- is also analyzed as a reference, for which we observe a signal with 6.6σsignificance, and measure the charge asymmetry A_{Dπ} to be -0.02^{+0.15}_{-0.16}(stat) \pm 0.04(syst). In addition, the ratio B(B^- -> D^0 K^-)/B(B^- -> D^0 π^-) is measured to be [6.77 \pm 0.23(stat) \pm 0.30(syst)] x 10^{-2}.
description: 6 pages, 3 figures, 2 tables
Supplementary material
Creators: name: Azevedo, Rafael
Publisher: name: figshare
Year: 2021
Subjects: subject: 110602 Exercise Physiology
subject: FOS: Health sciences
subject: 110999 Neurosciences not elsewhere classified
subject: FOS: Clinical medicine
subject: 111603 Systems Physiology
subject: FOS: Basic medicine

description: EMG responses in raw values for each condition.
Differential Tannakian Categories
Creators: name: Ovchinnikov, Alexey
Publisher: name: arXiv
Year: 2008
Subjects: subject: Representation Theory (math.RT)
subject: Commutative Algebra (math.AC)
subject: FOS: Mathematics
subject: 12H05, 13N10, 20G05

description: We define a differential Tannakian category and show that under a natural assumption it has a fibre functor. If in addition this category is neutral, that is, the target category for the fibre functor are finite dimensional vector spaces over the base field, then it is equivalent to the category of representations of a (pro-)linear differential algebraic group. Our treatment of the problem is via differential Hopf algebras and Deligne's fibre functor construction.
description: 24 pages; better structured Definition 2 and other statements of the paper; more examples; more detailed proof of Theorem 14
Modeling pressure pulsation and backflow in progressing cavity pumps with deformable stator
Creators: name: Müller, Jens
name: Kouhi, Yashar
name: Leonow, Sebastian
name: Mönnigmann, Martin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: This contribution studies the impact of the rotor-stator interaction in a single-stage progressing cavity pump on the flow rate and pressure. Specifically, we investigate the effect of the rotor movement on the sealings formed with deformable stators for various speeds and pressures. Sealings are reconstructed with the help of a geometric 3D model. We analyze the tangential and radial deviation of the rotor from its reference path and show that the radial deviation affects the flow rate, whereas the tangential deviation affects the pressure dynamics. The conjectures are confirmed with a laboratory test setup.
Additional file 1 of A survey of barriers and facilitators to the adoption of buprenorphine prescribing after implementation of a New Jersey-wide incentivized DATA-2000 waiver training program
Creators: name: Nyaku, Amesika N.
name: Zerbo, Erin A.
name: Chen, Clement
name: Milano, Nicole
name: Johnston, Barbara
name: Chadwick, Randall
name: Marcello, Stephanie
name: Baston, Kaitlan
name: Haroz, Rachel
name: Crystal, Stephen
Publisher: name: figshare
Year: 2024
Subjects: subject: Medicine
subject: Pharmacology
subject: Biotechnology
subject: Cancer
subject: Mental Health
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Computational Biology

description: Additional file 1. Survey instruments.
Natural-Language Multi-Agent Simulations of Argumentative Opinion Dynamics
Creators: name: Betz, Gregor
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computation and Language (cs.CL)
subject: Artificial Intelligence (cs.AI)
subject: Computers and Society (cs.CY)
subject: Multiagent Systems (cs.MA)
subject: Social and Information Networks (cs.SI)
subject: FOS: Computer and information sciences

description: This paper develops a natural-language agent-based model of argumentation (ABMA). Its artificial deliberative agents (ADAs) are constructed with the help of so-called neural language models recently developed in AI and computational linguistics. ADAs are equipped with a minimalist belief system and may generate and submit novel contributions to a conversation. The natural-language ABMA allows us to simulate collective deliberation in English, i.e. with arguments, reasons, and claims themselves -- rather than with their mathematical representations (as in formal models). This paper uses the natural-language ABMA to test the robustness of formal reason-balancing models of argumentation [Maes & Flache 2013, Singer et al. 2019]: First of all, as long as ADAs remain passive, confirmation bias and homophily updating trigger polarization, which is consistent with results from formal models. However, once ADAs start to actively generate new contributions, the evolution of a conservation is dominated by properties of the agents *as authors*. This suggests that the creation of new arguments, reasons, and claims critically affects a conversation and is of pivotal importance for understanding the dynamics of collective deliberation. The paper closes by pointing out further fruitful applications of the model and challenges for future research.
Cross-correlation of long-range correlated series
Creators: name: Arianos, Sergio
name: Carbone, Anna
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Finance (q-fin.ST)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Genomics (q-bio.GN)
subject: FOS: Economics and business
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: A method for estimating the cross-correlation $C_{xy}(τ)$ of long-range correlated series $x(t)$ and $y(t)$, at varying lags $τ$ and scales $n$, is proposed. For fractional Brownian motions with Hurst exponents $H_1$ and $H_2$, the asymptotic expression of $C_{xy}(τ)$ depends only on the lag $τ$ (wide-sense stationarity) and scales as a power of $n$ with exponent ${H_1+H_2}$ for $τ\to 0$. The method is illustrated on (i) financial series, to show the leverage effect; (ii) genomic sequences, to estimate the correlations between structural parameters along the chromosomes.
description: 14 pages, 8 figures
Doping dependent charge transfer gap and realistic electronic model of n-type cuprate superconductors
Creators: name: Xiang, T.
name: Luo, H. G.
name: Lu, D. H.
name: Shen, K. M.
name: Shen, Z. X.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Based on the analysis of the measurement data of angle-resolved photoemission spectroscopy (ARPES) and optics, we show that the charge transfer gap is significantly smaller than the optical one and is reduced by doping in electron doped cuprate superconductors. This leads to a strong charge fluctuation between the Zhang-Rice singlet and the upper Hubbard bands. The basic model for describing this system is a hybridized two-band $t$-$J$ model. In the symmetric limit where the corresponding intra- and inter-band hopping integrals are equal to each other, this two-band model is equivalent to the Hubbard model with an antiferromagnetic exchange interaction (i.e. the $t$-$U$-$J$ model). The mean-field result of the $t$-$U$-$J$ model gives a good account for the doping evolution of the Fermi surface and the staggered magnetization.
description: 4 pages 3 figures
Radiation GRMHD simulations of M87: funnel properties and prospects for gap acceleration
Creators: name: Yao, Philippe Z.
name: Dexter, Jason
name: Chen, Alexander Y.
name: Ryan, Benjamin R.
name: Wong, George N.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We use the public code ebhlight to carry out 3D radiative general relativistic magnetohydrodynamics (GRMHD) simulations of accretion onto the supermassive black hole in M87. The simulations self-consistently evolve a frequency-dependent Monte Carlo description of the radiation field produced by the accretion flow. We explore two limits of accumulated magnetic flux at the black hole (SANE and MAD), each coupled to several sub-grid prescriptions for electron heating that are motivated by models of turbulence and magnetic reconnection. We present convergence studies for the radiation field and study its properties. We find that the near-horizon photon energy density is an order of magnitude higher than is predicted by simple isotropic estimates from the observed luminosity. The radially dependent photon momentum distribution is anisotropic and can be modeled by a set of point-sources near the equatorial plane. We draw properties of the radiation and magnetic field from the simulation and feed them into an analytic model of gap acceleration to estimate the very high energy (VHE) gamma-ray luminosity from the magnetized jet funnel, assuming that a gap is able to form. We find luminosities of $\rm \sim 10^{41} \, erg \, s^{-1}$ for MAD models and $\rm \sim 2\times 10^{40} \, erg \, s^{-1}$ for SANE models, which are comparable to measurements of M87's VHE flares. The time-dependence seen in our calculations is insufficient to explain the flaring behavior. Our results provide a step towards bridging theoretical models of near-horizon properties seen in black hole images with the VHE activity of M87.
description: 16 pages, 17 figures, Accepted for publication by MNRAS