cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Measuring the global 21-cm signal with the MWA-II: improved characterisation of lunar-reflected radio frequency interference
Creators: name: Tiwari, Himanshu
name: McKinley, Benjamin
name: Trott, Cathryn M.
name: Thyagarajan, Nithyanandan
Publisher: name: arXiv
Year: 2023
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Radio interferometers can potentially detect the sky-averaged signal from the Cosmic Dawn (CD) and the Epoch of Reionisation (EoR) by studying the Moon as a thermal block to the foreground sky. The first step is to mitigate the Earth-based RFI reflections (Earthshine) from the Moon, which significantly contaminate the FM band $\approx 88-110$ MHz, crucial to CD-EoR science. We analysed MWA phase-I data from $72-180$ MHz at $40$ kHz resolution to understand the nature of Earthshine over three observing nights. We took two approaches to correct the Earthshine component from the Moon. In the first method, we mitigated the Earthshine using the flux density of the two components from the data, while in the second method, we used simulated flux density based on an FM catalogue to mitigate the Earthshine. Using these methods, we were able to recover the expected Galactic foreground temperature of the patch of sky obscured by the Moon. We performed a joint analysis of the Galactic foregrounds and the Moon's intrinsic temperature $(T_{\rm Moon})$ while assuming that the Moon has a constant thermal temperature throughout three epochs. We found $T_{\rm Moon}$ to be at $184.4\pm{2.6}\rm ~K$ and $173.8\pm{2.5}\rm ~K$ using the first and the second methods, respectively, and the best-fit values of the Galactic spectral index $(α)$ to be within the $5\%$ uncertainty level when compared with the global sky models. Compared with our previous work, these results improved constraints on the Galactic spectral index and the Moon's intrinsic temperature. We also simulated the Earthshine at MWA between November and December 2023 to find suitable observing times less affected by the Earthshine. Such observing windows act as Earthshine avoidance and can be used to perform future global CD-EoR experiments using the Moon with the MWA.
description: 17 pages, 14 figures and 8 tables, accepted for publication in PASA
Strong coupling of localized plasmons and molecular excitons in nanostructured silver films
Creators: name: Cade, N. I.
name: Ritman-Meer, T.
name: Richards, D.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We report on the resonant coupling between localized surface plasmon resonances (LSPRs) in nanostructured Ag films, and an adsorbed monolayer of Rhodamine 6G dye. Hybridization of the plasmons and molecular excitons creates new coupled polaritonic modes, which have been tuned by varying the LSPR wavelength. The resulting polariton dispersion curve shows an anticrossing behavior which is very well fit by a simple coupled-oscillator Hamiltonian, giving a giant Rabi-splitting energy of ~400 meV. The strength of this coupling is shown to be proportional to the square root of the molecular density. The Raman spectra of R6G on these films show an enhancement of many orders of magnitude due to surface enhanced scattering mechanisms; we find a maximum signal when a polariton mode lies in the middle of the Stokes shifted emission band.
description: 4 pages, 4 figures, submitted PRB
To those in the field who do strain...
Creators: name: Matthews, Jacq
Publisher: name: Archaeology Data Service
Year: 2015

description: This resource is a single blog post created as part of the Day of Archaeology initiative. The Day of Archaeology project aimed to provide a window into the daily lives of archaeologists from all over the world. The project asked people working, studying or volunteering in the archaeological world to participate in a 'Day of Archaeology' each year by recording their day and sharing it through text, images or video on the Day of Archaeology blog.
The project asked anyone with a personal, professional or voluntary interest in archaeology to get involved, and help highlight the reasons why archaeology is vital to protect the past and inform our futures. The resulting Day of Archaeology project archive demonstrates the wide variety of work the archaeological profession undertakes day-to-day across the globe, and helps to raise public awareness of the relevance and importance of archaeology to the modern world.
The first ever Day of Archaeology was held in 2011 and, since then, the project had thousands of archaeologists take part in the event, from those working in the field through to specialists working in laboratories and behind computers. The last Day of Archaeology was on Friday 28th July 2017.
$(2+1)$-Dimensional Black Holes in $f(R,ϕ)$ Gravity
Creators: name: Karakasis, Thanasis
name: Papantonopoulos, Eleftherios
name: Tang, Zi-Yu
name: Wang, Bin
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider a $f(R)$ gravity theory in $(2+1)$-dimensions with a self-interacting scalar field non-minimally coupled to gravity. Without specifying the form of the $f(R)$ function, solving the field equations we find that the Ricci scalar receives a non-linear correction term which breaks the conformal invariance and leads to a massless black hole solution. When the non-linear term decouples, we get a well known hairy black hole solution with the scalar field conformally coupled to gravity. We also find that the entropy of our black hole may be higher than the corresponding conformal black hole which indicates that our solution may be thermodynamically preferred.
description: Accepted for publication in PRD
Metastability of Discrete-Symmetry Flocks
Creators: name: Benvegnen, Brieuc
name: Granek, Omer
name: Ro, Sunghan
name: Yaacoby, Ran
name: Chaté, Hugues
name: Kafri, Yariv
name: Mukamel, David
name: Solon, Alexandre
name: Tailleur, Julien
Publisher: name: arXiv
Year: 2023
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study the stability of the ordered phase of flocking models with a scalar order parameter. Using both the active Ising model and a hydrodynamic description, we show that droplets of particles moving in the direction opposite to that of the ordered phase nucleate and grow. We characterize analytically this self-similar growth and demonstrate that droplets spread ballistically in all directions. Our results imply that, in the thermodynamic limit, discrete-symmetry flocks -- and, by extension, continuous-symmetry flocks with rotational anisotropy -- are metastable in all dimensions.
Meanings in motorcycling
Creators: name: Reeves, Robert Gordon
Publisher: name: University of British Columbia
Year: 2011

description: The thesis is divided into three major sections. Section One is devoted to a discussion of the motives and assumptions behind this particular study and of the problems involved in formulating a research procedure. The general intent is to generate an account of some important facets of the North American motorcycling boom. The basic method is to ask approximately fifteen hundred cyclists, "What do you get out of it?" in a series of separate motorcycle -situated encounters. It is assumed that this procedure elicits subject accounts of what motorcycling means. A schemata is developed to explain the process by which a single account of these many participant explications may be created. The result is a thematization of recurrent elements of responses. In addition, the further procedure of consultative feedback is employed in a series of one hundred second-order encounters. Section two contains a discussion of the nine major themes which are redacted as an account of the fifteen hundred encounters. Each theme is discussed at length, and the schematized relations between them are explained in terms of the clustering of concurrent response elements. In addition, two findings which do not fit the schema are presented: one is the adamant refusal to respond, the other is the invocation of a form of communality
Hot Brownian motion of optically levitated nanodiamonds
Creators: name: Rivière, François
name: de Guillebon, Timothée
name: Raynal, Damien
name: Schmidt, Martin
name: Lauret, Jean-Sébastien
name: Roch, Jean-François
name: Rondin, Loïc
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: The Brownian motion of a particle hotter than its environment is an iconic out-of-equilibrium system. Its study provides valuable insights into nanoscale thermal effects. Notably, it supplies an excellent diagnosis of thermal effects in optically levitated particles, a promising platform for force sensing and quantum physics tests. Thus, understanding the relevant parameters in this effect is critical. In this context, we test the role of particles' shape and material, using optically levitated nanodiamonds hosting NV centers to measure the particles' internal temperature and center-of-mass dynamics. We present a model to assess the nanodiamond internal temperature from its dynamics, adaptable to other particles. We also demonstrate that other mechanisms affect the nanodiamond dynamics and its stability in the trap. Finally, our work, by showing levitating nanodiamonds as an excellent tool for studying nano-thermal effects, opens prospects for increasing the trapping stability of optically levitated particles.
description: 14 pages with supporting information
Live from Aquileia (Italy)
Creators: name: Archeofest, Aquileia
Publisher: name: Archaeology Data Service
Year: 2015

description: This resource is a single blog post created as part of the Day of Archaeology initiative. The Day of Archaeology project aimed to provide a window into the daily lives of archaeologists from all over the world. The project asked people working, studying or volunteering in the archaeological world to participate in a 'Day of Archaeology' each year by recording their day and sharing it through text, images or video on the Day of Archaeology blog.
The project asked anyone with a personal, professional or voluntary interest in archaeology to get involved, and help highlight the reasons why archaeology is vital to protect the past and inform our futures. The resulting Day of Archaeology project archive demonstrates the wide variety of work the archaeological profession undertakes day-to-day across the globe, and helps to raise public awareness of the relevance and importance of archaeology to the modern world.
The first ever Day of Archaeology was held in 2011 and, since then, the project had thousands of archaeologists take part in the event, from those working in the field through to specialists working in laboratories and behind computers. The last Day of Archaeology was on Friday 28th July 2017.
A new approach for determining optimal placement of PM2.5 air quality sensors: case study for the contiguous United States
Creators: name: Kelp, Makoto M.
name: Lin, Samuel
name: Kutz, J. Nathan
name: Mickley, Loretta J.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Applications (stat.AP)
subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Considerable financial resources are allocated for measuring ambient air pollution in the United States, yet the locations for these monitoring sites may not be optimized to capture the full extent of current pollution variability. Prior research on best sensor placement for monitoring fine particulate matter (PM2.5) pollution is scarce: most studies do not span areas larger than a medium-sized city or examine timescales longer than one week. Here we present a pilot study using multiresolution modal decomposition (mrDMD) to identify the optimal placement of PM2.5 sensors from 2000-2016 over the contiguous United States. This novel approach incorporates the variation of PM2.5 on timescales ranging from one day to over a decade to capture air pollution variability. We find that the mrDMD algorithm identifies high-priority sensor locations in the western United States, but a significantly lower density of sensors than expected along the eastern coast, where a large number of EPA PM2.5 monitors currently reside. Specifically, 53% of mrDMD optimized sensor locations are west of the 100th meridian, compared to only 32% in the current EPA network. The mrDMD sensor locations can capture PM2.5 from wildfires and high pollution events, with particularly high skill in the West. These results suggest significant gaps in the current EPA monitoring network in the San Joaquin Valley in California, northern California, and in the Pacific Northwest (Idaho, and Eastern Washington and Oregon). Our framework diagnoses where to place air quality sensors so that they can best monitor smoke from wildfires. Our framework may also be applied to urban areas for equitable placement of PM2.5 monitors.
description: 18 pages, 3 figures, now published at Environmental Research Letters: https://doi.org/10.1088/1748-9326/ac548f
Application of preconditioned block BiCGGR to the Wilson-Dirac equation with multiple right-hand sides in lattice QCD
Creators: name: Tadano, H.
name: Kuramashi, Y.
name: Sakurai, T.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: There exist two major problems in application of the conventional block BiCGSTAB method to the O(a)-improved Wilson-Dirac equation with multiple right-hand-sides: One is the deviation between the true and the recursive residuals. The other is the convergence failure observed at smaller quark masses for enlarged number of the right-hand-sides. The block BiCGGR algorithm which was recently proposed by the authors succeeds in solving the former problem. In this article we show that a preconditioning technique allows us to improve the convergence behavior for increasing number of the right-hand-sides.
description: 10 pages, 3 figures
Insight into the electronic structure of the centrosymmetric skyrmion magnet GdRu$_2$Si$_2$
Creators: name: Eremeev, S. V.
name: Glazkova, D.
name: Poelchen, G.
name: Kraiker, A.
name: Ali, K.
name: Tarasov, A. V.
name: Schulz, S.
name: Kliemt, K.
name: Chulkov, E. V.
name: Stolyarov, V. S.
name: Ernst, A.
name: Krellner, C.
name: Usachov, D. Yu.
name: Vyalikh, D. V.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The discovery of a square magnetic-skyrmion lattice in GdRu$_2$Si$_2$, with the smallest so far found skyrmion diameter and without a geometrically frustrated lattice, has attracted significant attention, particularly for potential applications in memory devices and quantum computing. In this work, we present a comprehensive study of surface and bulk electronic structures of GdRu$_2$Si$_2$ by utilizing momentum-resolved photoemission (ARPES) measurements and first-principles calculations. We show how the electronic structure evolves during the antiferromagnetic transition when a peculiar helical order of 4$f$ magnetic moments within the Gd layers sets in. A nice agreement of the ARPES-derived electronic structure with the calculated one has allowed us to characterize the features of the Fermi surface (FS), unveil the nested region along the $k_z$ at the corner of the 3D FS, and reveal their orbital compositions. Our findings suggest that the Ruderman-Kittel-Kasuya-Yosida interaction plays a decisive role in stabilizing the spiral-like order of Gd 4$f$ moments responsible for the skyrmion physics in GdRu$_2$Si$_2$. Our results provide a deeper understanding of electronic and magnetic properties of this material, which is crucial for predicting and developing novel skyrmion-based devices.
description: 13 pages, 8 figures
Punk Archaeology: The Album
Creators: name: Reinhard, Andrew
Publisher: name: Archaeology Data Service
Year: 2015

description: This resource is a single blog post created as part of the Day of Archaeology initiative. The Day of Archaeology project aimed to provide a window into the daily lives of archaeologists from all over the world. The project asked people working, studying or volunteering in the archaeological world to participate in a 'Day of Archaeology' each year by recording their day and sharing it through text, images or video on the Day of Archaeology blog.
The project asked anyone with a personal, professional or voluntary interest in archaeology to get involved, and help highlight the reasons why archaeology is vital to protect the past and inform our futures. The resulting Day of Archaeology project archive demonstrates the wide variety of work the archaeological profession undertakes day-to-day across the globe, and helps to raise public awareness of the relevance and importance of archaeology to the modern world.
The first ever Day of Archaeology was held in 2011 and, since then, the project had thousands of archaeologists take part in the event, from those working in the field through to specialists working in laboratories and behind computers. The last Day of Archaeology was on Friday 28th July 2017.
ASL-Skeleton3D and ASL-Phono: Two Novel Datasets for the American Sign Language
Creators: name: de Amorim, Cleison Correia
name: Zanchettin, Cleber
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: Sign language is an essential resource enabling access to communication and proper socioemotional development for individuals suffering from disabling hearing loss. As this population is expected to reach 700 million by 2050, the importance of the language becomes even more essential as it plays a critical role to ensure the inclusion of such individuals in society. The Sign Language Recognition field aims to bridge the gap between users and non-users of sign languages. However, the scarcity in quantity and quality of datasets is one of the main challenges limiting the exploration of novel approaches that could lead to significant advancements in this research area. Thus, this paper contributes by introducing two new datasets for the American Sign Language: the first is composed of the three-dimensional representation of the signers and, the second, by an unprecedented linguistics-based representation containing a set of phonological attributes of the signs.
The Sacred Narco− Psychoactive Plants In Ancient Civilization: A Systematic Review Of Nymphaea Caerulea (Egyptian Water Lily) Flower; Analysis From Pharmacological To Medicinal Perspective For Future Application.
Creators: name: Mufeedha, Ayishath
Publisher: name: zenodo
Year: 2024
Subjects: subject: Ancient Egypt
subject: Alkaloids
subject: blue lotus
subject: drugs
subject: Ethnobotany
subject: Flavonoids
subject: Historiography
subject: Maya
subject: Nymphaea Caerulea
subject: Opium poppy
subject: Papaver somniferum
subject: phytomedicine
subject: rituals
subject: water lily

description: Nymphaea (Nauchali var.Caerulea) is a plant that was once abundant on the Nile Delta.  It is a rare type of water lily found in African and Asian regions. According to several studies, art depiction of the blue lotus flower was reported on Egyptian papyri and tombs from the 14th century B.C. It held a great cultural and religious significance within ancient civilization, in which ancient Egypt had the portrayal  of it among multiple locations at various times throughout the history, which later went on as folklore or mythological tale. This study investigates and discuss its common use as a "traditional drug/ ingredient" in  various rituals and examines its role to cure a variety of diseases. Additionally, investigates its role into some of the other cultures, such as (Mesoamerican, Persian, and Asian) that had the use of  nymphaea species and related plants. Given the significance of this plant in Ancient Civilization,  warranted further exploration and investigation of the use of it in modern times, its pharmaceutical properties, compounds  and the link to several modern diseases and side effects. The main aim of this article includes; providing a comprehensive overview of its chemical properties, pharmacological activities, the underlying regulatory and legality mechanisms, hence discovering new potential for therapeutic use. This paper could guide researchers come to their conclusions about the Nymphaea Caerulea flower and hinder for further use of  this plant.
Exploring the Impact of Model Scaling on Parameter-Efficient Tuning
Creators: name: Su, Yusheng
name: Chan, Chi-Min
name: Cheng, Jiali
name: Qin, Yujia
name: Lin, Yankai
name: Hu, Shengding
name: Yang, Zonghan
name: Ding, Ning
name: Sun, Xingzhi
name: Xie, Guotong
name: Liu, Zhiyuan
name: Sun, Maosong
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computation and Language (cs.CL)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Parameter-efficient tuning (PET) methods can effectively drive extremely large pre-trained language models (PLMs) by training only minimal parameters. Different PET methods utilize different manually designed tunable modules. In small PLMs, there are usually noticeable performance differences among PET methods. Nevertheless, as the model scale increases, the performance differences become marginal. Hence, we hypothesize that model scaling mitigates the impact of design differences on PET methods. To investigate this hypothesis, we introduce a more flexible PET method called Arbitrary PET (APET) method. The APET method is compatible with a tunable module, which consists of any number of parameters distributed in arbitrary positions. Then, we utilize it and conduct experiments on 11 NLP tasks across 3 representative PLMs. Our investigations reveal that model scaling (1) mitigates the effects of the positions of tunable parameters on performance, and (2) enables tuning methods to achieve performance comparable to full-parameter fine-tuning by optimizing fewer tunable parameters. Intriguingly, we also observe that tuning methods optimize the similar number of tunable parameters to exceed random guess performance on different tasks. We collectively discuss this phenomenon and the two aforementioned findings from an optimization perspective to understand the underlying mechanisms. These conclusions enhance our understanding of the impact of model scaling on PET and assist in designing more effective and efficient PET methods for PLMs of different scales. The source code can be obtained from this GitHub repository: \url{https://github.com/yushengsu-thu/PET_Scaling}.
Endandered Archaeology in the Middle East
Creators: name: Cunliffe, Emma
Publisher: name: Archaeology Data Service
Year: 2015

description: This resource is a single blog post created as part of the Day of Archaeology initiative. The Day of Archaeology project aimed to provide a window into the daily lives of archaeologists from all over the world. The project asked people working, studying or volunteering in the archaeological world to participate in a 'Day of Archaeology' each year by recording their day and sharing it through text, images or video on the Day of Archaeology blog.
The project asked anyone with a personal, professional or voluntary interest in archaeology to get involved, and help highlight the reasons why archaeology is vital to protect the past and inform our futures. The resulting Day of Archaeology project archive demonstrates the wide variety of work the archaeological profession undertakes day-to-day across the globe, and helps to raise public awareness of the relevance and importance of archaeology to the modern world.
The first ever Day of Archaeology was held in 2011 and, since then, the project had thousands of archaeologists take part in the event, from those working in the field through to specialists working in laboratories and behind computers. The last Day of Archaeology was on Friday 28th July 2017.
Implantable and Ingestible Antenna Systems: From imagination to realization
Creators: name: Basir, Abdul
name: Cho, Youngdae
name: Shah, Izaz Ali
name: Hayat, Shahzeb
name: Ullah, Sana
name: Zada, Muhammad
name: Shah, Syed Ahson Ali
name: Yoo, Hyoungsuk
Publisher: name: arXiv
Year: 2023
Subjects: subject: Medical Physics (physics.med-ph)
subject: FOS: Physical sciences

description: Biomedical implantable technologies are life-saving modalities for millions of people globally because of their abilities of wireless remote monitoring, regulating the abnormal functions of internal organs, and early detection of cognitive disorders. Enabling these devices with wireless functionalities, implantable antennas are the crucial front-end component of them. Detailed overviews of the implantable and ingestible antennas, their types, miniaturization techniques, measurement phantoms, biocompatibility issues, and materials are available in the literature. This article comprehensively reviews the design processes, design techniques and methods, types of antennas, electromagnetic (EM) simulators, and radiofrequency (RF) bands used for implantable and ingestible antennas. We briefly discussed the latest advancements in this field and extended their scope beyond conventional implantable applications. Their related issues and challenges are highlighted, and the performance enhancement techniques have been discussed in detail. All the scoped implantable applications have been covered in this review. A standard protocol has been devised to provide a simple and efficient roadmap for the design and realization of the implantable and ingestible antenna for future RF engineers and researchers. This protocol minimizes the errors in simulations and measurements by enhancing the agreement between simulated and measured results and simplifies the process of development of implantable and ingestible antennas. It generalizes the process from idea-to-realization-to-commercialization and provides an easy roadmap for the industry.
interrelationship of regional transportation regional government, and planning regions in Saskatchewan
Creators: name: Ropertz, Henry
Publisher: name: University of British Columbia
Year: 2011

description: The related concepts of regional planning and regional government have been a topic of discussion in Saskatchewan for a considerable period of time without yet being resolved. There are immediate questions requiring solutions which can best be handled on a regional scale: rail line abandonment and grain movement rationalization; changing consumer patterns that are by-passing small service-centers; the effects of population shift from rural to urban areas; the broadening of the economic base and the creation of a vehicle for the effective use of and therefore, the attraction of Federal development grants. Progress in resolving the above issues has been hampered because debate on these topics has been focused on issues that are not relevant. Discussion to date has centered on conflicting urban and rural values, heightened by a misunderstanding on the part of urban-oriented academics and professionals concerning rural needs and way of life. This point has created political attitudes which are detrimental to the adoption of regional government at this time. In summary, there exists a conflict between the idealistic imposition of regional government versus popular recognition of the concept. The thesis purports to show that resolution of this stalemate might be aided by a recognition of the present existence of informal regions and the corresponding existence of inter-dependence of nodal-centers and their surrounding areas. This is done by examining the relevance of current regional theory and literature pertaining to regional planning and central place theory. Several empirical studies and regional workshops were examined to comprehend previous attempts to establish a basis for regionalizing the province. The pattern of average daily traffic volume was used to delimit areas of activity that have developed naturally. An intuitive information letter provided an insight on how the public debate has strayed off the track; where the debate now stands regarding regional government; and what degree of progress is immediately feasible. The thesis concludes that informal regions exist to a degree that will sufficiently display the urban-rural community of interest and will enable problem-solving to occur predominantly on the required regional scale in respect of the type of issues discussed above. Finally, a new functional organization is suggested to act on these findings
Theory of hot-carrier generation in bimetallic plasmonic catalysts
Creators: name: Jin, Hanwen
name: Herran, Matias
name: Cortes, Emiliano
name: Lischner, Johannes
Publisher: name: arXiv
Year: 2023
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Bimetallic nanoreactors in which a plasmonic metal is used to funnel solar energy towards a catalytic metal have recently been studied experimentally, but a detailed theoretical understanding of these systems is lacking. Here, we present theoretical results of hot-carrier generation rates of different Au-Pd nanoarchitectures. In particular, we study spherical core-shell nanoparticles with a Au core and a Pd shell as well as antenna-reactor systems consisting of a large Au nanoparticle with acts as antenna and a smaller Pd satellite nanoparticle separated by a gap. In addition, we investigate an antenna-reactor system in which the satellite is a core-shell nanoparticle. Hot-carrier generation rates are obtained from an atomistic quantum-mechanical modelling technique which combines a solution of Maxwell's equation with a tight-binding description of the nanoparticle electronic structure. We find that antenna-reactor systems exhibit significantly higher hot-carrier generation rates in the catalytic material than the core-shell system as a result of strong electric field enhancements associated with the gap between the antenna and the satellite. For these systems, we also study the dependence of hot-carrier generation rate on the size of the gap, the radius of the antenna nanoparticle and the direction of light polarization. Our insights pave the way towards a mechanistic understanding of hot-carrier generation in heterogeneous nanostructures for photocatalysis and other energy conversion applications.
An apparent GRBs evolution around us or a sampling of thin GRB beaming jets?
Creators: name: Fargion, D.
name: D'Armiento, D.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The gamma ray burst apparent average isotropic power versus their red-shift of all known GRB (Sept.2009) is reported. It calls for an unrealistic Gamma Ray Burst Evolution around us or it just probe the need of a very thin gamma precession-jet model. These precessing and spinning jet are originated by Inverse Compton and-or Synchrotron Radiation at pulsars or micro-quasars sources, by ultra-relativistic electrons. These Jets are most powerful at Supernova birth, blazing, once on axis, to us and flashing GRB detector. The trembling of the thin jet (spinning, precessing, bent by magnetic fields) explains naturally the observed erratic multi-explosive structure of different GRBs and its rare re-brightening. The jets are precessing (by binary companion or inner disk asymmetry) and decaying by power law on time scales to a few hours. GRB blazing occurs inside the observer cone of view only a seconds duration times; because relativistic synchrotron (or IC) laws the jet angle is thinner in gamma but wider in X band. Its apparent brightening is so well correlated with its hardness (The Amati correlation). This explain the wider and longer X GRB afterglow duration and the (not so much) rare presence of X-ray precursors well before the apparent main GRB explosion. The jet lepton maybe originated by an inner primary hadron core (as well as pions and muons secondary Jets). The EGRET, AGILE and Fermi few hardest and late GeV gamma might be PeV neutron beta decay in flight observed in-axis under a relativistic shrinkage.
description: 13 pages, 11 figures, Vulcano 2009
Optimal combination of data modes in inverse problems: maximum compatibility estimate
Creators: name: Kaasalainen, Mikko
Publisher: name: arXiv
Year: 2010
Subjects: subject: Optimization and Control (math.OC)
subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: We present an optimal strategy for the relative weighting of different data modes in inverse problems, and derive the maximum compatibility estimate (MCE) that corresponds to the maximum likelihood or maximum a posteriori estimates in the case of a single data mode. MCE is not explicitly dependent on the noise levels, scale factors or numbers of data points of the complementary data modes, and can be determined without the mode weight parameters. As a case study, we consider the problem of reconstructing the shape of a body in $\R^3$ from the boundary curves (profiles) and volumes (brightness values) of its generalized projections.
description: ISAAC 2009 (London) conference proceedings
Electrostatic co-assembly of iron oxide nanoparticles and polymers : towards the generation of highly persistent superparamagnetic nanorods
Creators: name: Fresnais, J.
name: Berret, J. -F.
name: Frka-Petesic, B.
name: Sandre, O.
name: Perzynski, R.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A paradigm proposed recently by Boal et al. (A.K. Boal et al., Nature 404, 746-748, 2000) deals with the possibility to use inorganic nanoparticles as building blocks for the design and fabrication of colloidal and supracolloidal assemblies. It is anticipated that these constructs could be made of different shapes, patterns and functionalities and could constitute the components of future nanodevices including sensors, actuators or nanocircuits. Here we report a protocol that allowed us to fabricate such nanoparticle aggregates. The building blocks of the constructs were anionically coated iron oxide nanocrytals (superparamagnetic, size 7 nm) and cationic-neutral block copolymers. We have shown that the electrostatic interactions between charged species can be controlled by tuning the ionic strength of the dispersion. Under appropriate conditions, the control of electrostatics resulted in the elaboration of spherical or elongated aggregates at the micrometer length scale. The elongated aggregates were found to be rod-like, with diameters of a few hundred nanometers and lengths between 1 and 50 micrometers. In addition to their remarkable stiffness, the nanostructured rods were found to reorient along with an externally applied magnetic field, in agreement with the laws of superparamagnetism.
description: 6 pages, 5 figures, appeared in Advanced materials in September 2008, reference :
Where art meets archaeology: Finding artefacts for an art exhibition of excavations at Calleva Atrebatum
Creators: name: Hampshire Cultural Trust
Publisher: name: Archaeology Data Service
Year: 2015

description: This resource is a single blog post created as part of the Day of Archaeology initiative. The Day of Archaeology project aimed to provide a window into the daily lives of archaeologists from all over the world. The project asked people working, studying or volunteering in the archaeological world to participate in a 'Day of Archaeology' each year by recording their day and sharing it through text, images or video on the Day of Archaeology blog.
The project asked anyone with a personal, professional or voluntary interest in archaeology to get involved, and help highlight the reasons why archaeology is vital to protect the past and inform our futures. The resulting Day of Archaeology project archive demonstrates the wide variety of work the archaeological profession undertakes day-to-day across the globe, and helps to raise public awareness of the relevance and importance of archaeology to the modern world.
The first ever Day of Archaeology was held in 2011 and, since then, the project had thousands of archaeologists take part in the event, from those working in the field through to specialists working in laboratories and behind computers. The last Day of Archaeology was on Friday 28th July 2017.
Tenebris in lux : the performance of code and the aesthetics of transmission in contemporary art through practice-orientated research
Creators: name: Mauro Flude, MN
Publisher: name: University Of Tasmania
Year: 2023

description: This thesis contributes to the discourse concerning the role played by computational devices in contemporary culture, specifically, in contemporary art and performance. It addresses the cultural chasm - which has been widening since the Industrial Revolution - between the production and consumption of technology. A position is developed that unmasks the creative possibilities of experiencing the computer as a theatre machine, a mechanism of infinite purposes and diverse desires, rather than solely as an unmediated presentation of a 'ready-made' functional tool. Beyond this technological pragmatism, the inquiry instead points to a richer engagement with technology that can occur through the application of arcane cultural practices from speculative traditions of thinking that include cryptography, theatre and occult philosophy. The study examines the depth of the reach of the computer into the social fabric of everyday life through a series of experimental artworks and performances. The research areas mobilised in the artworks and applied in the exegesis posit that the distinguishing character of computer networks and systems lies in their materiality. This research also extends to the modes of performance they enable, through which human beings participate and interact. An exploration of the black-box metaphor - as applied to both computers and theatre and a review of links they share - demonstrates how perceptions about techne and the aesthetic use of technology are shaped by a knowledge of social histories, politics and cultural experiences. Dramaturgy is a central discipline framing the project because performative actions offer an insight into, and elaboration of, aesthetic processes and the effect of technical provocations. Underlying the artworks that make up this thesis is a methodology that defines radical subjectivity. By drawing attention to the apparatus used to construct and enact the work, new models of aesthetic engagement are created which can be characterised by a playful enactment (a ludibrium) of arcane tropes. The thesis concludes that profound play with the limits of a given schema, even of the most utilitarian kind, can lead to startling transfigurations and unanticipated ripples of sway far beyond the maker's intent.
Spot the TrowelBlazer!
Creators: name: Hassett, Brenna
Publisher: name: Archaeology Data Service
Year: 2015

description: This resource is a single blog post created as part of the Day of Archaeology initiative. The Day of Archaeology project aimed to provide a window into the daily lives of archaeologists from all over the world. The project asked people working, studying or volunteering in the archaeological world to participate in a 'Day of Archaeology' each year by recording their day and sharing it through text, images or video on the Day of Archaeology blog.
The project asked anyone with a personal, professional or voluntary interest in archaeology to get involved, and help highlight the reasons why archaeology is vital to protect the past and inform our futures. The resulting Day of Archaeology project archive demonstrates the wide variety of work the archaeological profession undertakes day-to-day across the globe, and helps to raise public awareness of the relevance and importance of archaeology to the modern world.
The first ever Day of Archaeology was held in 2011 and, since then, the project had thousands of archaeologists take part in the event, from those working in the field through to specialists working in laboratories and behind computers. The last Day of Archaeology was on Friday 28th July 2017.
Geometric Characteristics of Dynamic Correlations for Combinatorial Regulation in Gene Expression Noise
Creators: name: Zhang, Jiajun
name: Yuan, Zhanjiang
name: Zhou, Tianshou
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantitative Methods (q-bio.QM)
subject: FOS: Biological sciences

description: Knowing which mode of combinatorial regulation (typically, AND or OR logic operation) that a gene employs is important for determining its function in regulatory networks. Here, we introduce a dynamic cross-correlation function between the output of a gene and its upstream regulator concentrations for signatures of combinatorial regulation in gene expression noise. We find that the correlation function is always upwards convex for the AND operation whereas downwards convex for the OR operation, whichever sources of noise (intrinsic or extrinsic or both). In turn, this fact implies a means for inferring regulatory synergies from available experimental data. The extensions and applications are discussed.
description: 4 pages, 3 figures, and supporting material
Rigorous analysis of the topologically protected edge states in the quantum spin Hall phase of the armchair ribbon geometry
Creators: name: Sadeghizadeh, Mozhgan
name: Soltani, Morteza
name: Amini, Mohsen
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Studying the edge states of a topological system and extracting their topological properties is of great importance in understanding and characterizing these systems. In this paper, we present a novel analytical approach for obtaining explicit expressions for the edge states in the Kane-Mele model within a ribbon geometry featuring armchair boundaries. Our approach involves a mapping procedure that transforms the system into an extended Su-Schrieffer-Heeger model, specifically a two-leg ladder, in momentum space. Through rigorous derivation, we determine various analytical properties of the edge states, including their wave functions and energy dispersion. Additionally, we investigate the condition for topological transition by solely analyzing the edge states, and we elucidate the underlying reasons for the violation of the bulk-edge correspondence in relatively narrow ribbons. Our findings shed light on the unique characteristics of the edge states in the quantum spin Hall phase of the Kane-Mele model and provide valuable insights into the topological properties of such systems.
Vortex-glass phase transition and superconductivity in an under- doped (Ba,K)Fe2As2 single crystal
Creators: name: Kim, Hyeong-Jin
name: Liu, Yong.
name: Oh, Yoon Seok
name: Khim, Seunghyun
name: Kim, Ingyu
name: Stewart, G. R.
name: Kim, Kee Hoon
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: Measurements of magnetotransport and current-voltage (I-V) characteristics up to 9 T were used to investigate the vortex phase diagram of an under-doped Measurements of magnetotransport and current-voltage (I-V) characteristics up to 9 T were used to investigate the vortex phase diagram of an under-doped (Ba,K)Fe2As2 single crystal with Tc=26.2 K. It is found that the anisotropy ratio of the upper critical field Hc2 decreases from 4 to 2.8 with decreasing temperature from Tc to 24.8 K. Consistent with the vortex-glass theory, the I-V curves measured at H=9 T can be well scaled with the vortex-glass transition temperature of Tg=20.7 K and critical exponents z=4.1 and v=1. Analyses in different magnetic fields produced almost identical critical exponent values, with some variation in Tg, corroborating the existence of the vortex-glass transition in this under-doped (Ba,K)Fe2As2 single crystal up to 9 T. A vortex phase diagram is presented, based on the evolution of Tg and Hc2 with magnetic field.
description: 23 pages, 7 figures. accepted in Phys. Rev. B
Digging Diaries - Old Shipwreck, New Mystery - The Wreck of the London
Creators: name: Minihan, Denis
Publisher: name: Archaeology Data Service
Year: 2015

description: This resource is a single blog post created as part of the Day of Archaeology initiative. The Day of Archaeology project aimed to provide a window into the daily lives of archaeologists from all over the world. The project asked people working, studying or volunteering in the archaeological world to participate in a 'Day of Archaeology' each year by recording their day and sharing it through text, images or video on the Day of Archaeology blog.
The project asked anyone with a personal, professional or voluntary interest in archaeology to get involved, and help highlight the reasons why archaeology is vital to protect the past and inform our futures. The resulting Day of Archaeology project archive demonstrates the wide variety of work the archaeological profession undertakes day-to-day across the globe, and helps to raise public awareness of the relevance and importance of archaeology to the modern world.
The first ever Day of Archaeology was held in 2011 and, since then, the project had thousands of archaeologists take part in the event, from those working in the field through to specialists working in laboratories and behind computers. The last Day of Archaeology was on Friday 28th July 2017.
THE ROUTE OF GOODNESS. EPISTEMIC EMOTIONS, SELF-TRANSFORMATION, AND PERFECTION
Creators: name: Candiotto, Laura
Publisher: name: Thaumàzein | Rivista di Filosofia
Year: 2018
Subjects: Perfectionism; Virtue Epistemology; Epistemic Emotions; Wisdom; Self-Transformation.

description: The aim of this essay is to detect the role of epistemic emotions in the development of rationality as human perfection. I take the development of excellence as a process of self-transformation, broadening the notion of rationality to include affective powers, and discussing the eudaimonic value of wisdom. Thus, I depict the perfectionist route that brings the epistemic agent to wisdom as prudential value, explaining why being in the route of goodness matters for the agent’s happiness. In doing so, I refer to the account of epistemic emotions as building blocks of intellectual virtues [Candiotto 2017], arguing for one of its tenets, the one for which epistemic emotions have the capacity to transform the character of the epistemic agent beneficially.
description: Thaumàzein | Rivista di Filosofia, Vol 4 (2016): Vol. 5 (2017) - Volume doppio: Filosofia della nascita