cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Reducing uncertainty in WEC extreme load estimates via Goodness-of-Fit testing
Creators: name: Martini, Michele
name: Cruz, Joao
name: Cruz, Mairead Atcheson
Publisher: name: Zenodo
Year: 2022
Subjects: IMPACT
VALID
Wave energy converters
Goodness-of-fit

description: Structural failure occurs when stress at a specific location exceeds the local material resistance capacity. The methodology developed in this work draws on existing best practices to suggest a novel, practical method to assess the suitability of specific extreme value distributions for the estimation of extreme loads in the design of offshore structures. The proposed method is based on the use of goodness-of-Fit (GoF) tests.
Macroscopic modeling of porous and granular materials --- microstructure, thermodynamics and some boundary-initial value problems
Creators: name: Wilmanski, Krzysztof
Publisher: name: Weierstrass Institute
Year: 2003
Subjects: subject: Thermodynamics
subject: Biot's model
subject: poroelastic materials
subject: acoustic waves
subject: surface waves
subject: 35L50
subject: 74J15
subject: 80A17
subject: 74A20
subject: 74F10

description: This work contains the material presented in the key lecture during the Congress Cancam 2003 (Calgary, Canada). It contains a review of the recent development of thermodynamic modeling of porous and granular materials. We present briefly main features of the thermodynamic construction of a nonlinear poroelastic model but the emphasis is put on the analysis of a linear two-component model. In particular we indicate similarities and differences of the thermodynamic model with the classical Biot's model of porous materials. We analyze jacketed and ujacketed Gedankenexperiments which provide a micro-macrotransition procedure for compressibilities. This gives rise to Gassmann-like relations which are incorporated in wave analysis. An acoustic waves analysis is presented in some details. In particular we show the construction of bulk monochromatic waves as well as some surface waves and indicate their practical applications in testing of soils.
SST at 70-m scale from ecostress on the space station: application to complex coasts and intertidal flats
Creators: name: Wethey, David
Publisher: name: Zenodo
Year: 2021

description: Full list of authors: David S Wethey, Nicolás F Weidberg, Sarah A Woodin Department of Biological Sciences, University of South Carolina wethey@biol.sc.edu Funded by NASA 80NSSC20K0074 https://ecostress.jpl.nasa.gov/team Presented at the 22nd GHRSST Science Team meeting (XXII), online, 7-11 June 2021
The Herschel-ATLAS: Extragalactic Number Counts from 250 to 500 Microns
Creators: name: Clements, D. L.
name: Rigby, E.
name: Maddox, S.
name: Dunne, L.
name: Mortier, A.
name: Pearson, C.
name: Amblard, A.
name: Auld, R.
name: Baes, M.
name: Bonfield, D.
name: Burgarella, D.
name: Buttiglione, S.
name: Cava, A.
name: Cooray, A.
name: Dariush, A.
name: de Zotti, G.
name: Dye, S.
name: Eales, S.
name: Frayer, D.
name: Fritz, J.
name: Gardner, Jonathan P.
name: Gonzalez-Nuevo, J.
name: Herranz, D.
name: Ibar, E.
name: Ivison, R.
name: Jarvis, M. J.
name: Lagache, G.
name: Leeuw, L.
name: Lopez-Caniego, M.
name: Negrello, M.
name: Pascale, E.
name: Pohlen, M.
name: Rodighiero, G.
name: Samui, S.
name: Serjeant, S.
name: Sibthorpe, B.
name: Scott, Douglas
name: Smith, D. J. B.
name: Temi, P.
name: Thompson, M.
name: Valtchanov, I.
name: van der Werf, P.
name: Verma, A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Aims. The Herschel-ATLAS survey (H-ATLAS) will be the largest area survey to be undertaken by the Herschel Space Observatory. It will cover 550 sq. deg. of extragalactic sky at wavelengths of 100, 160, 250, 350 and 500 microns when completed, reaching flux limits (5 sigma) from 32 to 145mJy. We here present galaxy number counts obtained for SPIRE observations of the first ~14 sq. deg. observed at 250, 350 and 500 microns. Methods. Number counts are a fundamental tool in constraining models of galaxy evolution. We use source catalogs extracted from the H-ATLAS maps as the basis for such an analysis. Correction factors for completeness and flux boosting are derived by applying our extraction method to model catalogs and then applied to the raw observational counts. Results. We find a steep rise in the number counts at flux levels of 100-200mJy in all three SPIRE bands, consistent with results from BLAST. The counts are compared to a range of galaxy evolution models. None of the current models is an ideal fit to the data but all ascribe the steep rise to a population of luminous, rapidly evolving dusty galaxies at moderate to high redshift.
description: Accepted for publication in Astronomy and Astrophysics
Ο πληθυσμός της Ελλάδας μειώνεται συνεχώς μετά το 2010, οι μεταβολές του όμως σε περιφερειακό επίπεδο διαφέρουν σημαντικά: ο ρόλος των Φυσικών και των Μεταναστευτικών Ισοζυγίων. (The population of Greece is constantly decreasing, but changes at regional level differ significantly: the role of natural increase and net migration.) DIRAP, FLASH NEWS 4, 2021
Creators: name: KOTZAMANIS, BYRON
name: Pappas, Vassilis
Publisher: name: figshare
Year: 2021
Subjects: subject: 160399 Demography not elsewhere classified
subject: FOS: Sociology

description: The population of Greece has been constantly declining after 2010, and the next census will confirm it as the resident population at the end of 2021 will be, if the coverage of the population in these two censuses will not differ significantly, 450.-500.00 less than in 2011. Waiting for the results of the 2021 census, and limiting to a nine year period (1/1/2011-1/1/2020), during which the population decrease has been estimated at 400 thousand, our interest lies in the following questions: Does this decrease apply to all regions? Does the population growth differ significantly between them? How did the natural increase and the net migration contribute to this? We will answer the above questions using the data (population estimates, birth records, and deaths) provided by the Hellenic Statistical Authority for this period.

Ο πληθυσμός της Ελλάδας μειώνεται συνεχώς μετά το 2010 και η απογραφή που θα διεξαχθεί θα το επιβεβαιώσει καθώς πιθανότατα οι μόνιμοι κάτοικοι στα τέλη του 2021 θα είναι κατά 450.-500.00 λιγότεροι από αυτούς που απεγράφησαν τον Μάιο του 2011 (υπό την προϋπόθεση ότι η κάλυψη του πληθυσμού στις δυο αυτές απογραφές δεν θα διαφοροποιείται σημαντικά). Σε αναμονή των αποτελεσμάτων της απογραφής αυτής, θα περιορισθούμε στην περίοδο 2011-2020, στη διάρκεια της οποίας η μείωση ανέρχεται σε 400 περίπου χιλιάδες και θα απαντήσουμε στα εξής ερωτήματα: ι) η μείωση αυτή αφορά όλες τις περιοχές; ιι) η ένταση των μεταβολών είναι περίπου ή ίδια ή αντιθέτως υπάρχουν σημαντικές διαφοροποιήσεις ; ιι) Πως εξελίχθηκαν τα Φυσικά Ισοζύγια (γεννήσεις- θάνατοι) και πως τα Μεταναστευτικά (είσοδοι – έξοδοι) και ειδικότερα πως αυτά συνέβαλαν στις μεταβολές του πληθυσμού της περίοδού 1/1/2011-1/1/2020; Στα προαναφερθέντα ερωτήματα θα απαντήσουμε αξιοποιώντας τα στοιχεία της Ελληνικής Στατιστικής Αρχής (ΕΛΣΤΑΤ) για την εννεαετή αυτή περίοδο (εκτιμήσεις για τον πληθυσμό, δεδομένα ληξιαρχείων για τις γεννήσεις και τους θανάτους)
Algebra-Logical Repair Method for FPGA Logic Blocks
Creators: name: Hahanov, Vladimir
name: Litvinova, Eugenia
name: Gharibi, Wajeb
name: Guz, Olesya
Publisher: name: arXiv
Year: 2011
Subjects: subject: Hardware Architecture (cs.AR)
subject: FOS: Computer and information sciences

description: An algebra-logical repair method for FPGA functional logic blocks on the basis of solving the coverage problem is proposed. It is focused on implementation into Infrastructure IP for system-on-a chip and system-in-package. A method is designed for providing the operability of FPGA blocks and digital system as a whole. It enables to obtain exact and optimal solution associated with the minimum number of spares needed to repair the FPGA logic components with multiple faults.
description: 7 pages
The influence of sensorimotor loop delays in maintaining upright stance
Creators: name: McKendry, Geoffrey James
Publisher: name: University of British Columbia
Year: 2018

description: Sensorimotor delays are inherent to the control of standing balance. Increases in sensorimotor delays observed during healthy aging and in people with Multiple Sclerosis (MS) have been theorized to reduce stability. The aim was to determine if balance stability declines with increasing artificial delays in balance control. Furthermore, I sought to determine whether there is an association between estimates of sensorimotor loop delays and the artificial delays at which people become unstable. Thirty healthy participants (19 to 75 years) and three participants with MS were recruited. A rotating platform elicited balance responses to pitch rotations. Surface electromyography recorded muscle activity from soleus (Sol), medial gastrocnemius (mGas), and tibialis anterior (TA) to determine onset latencies of balance responses, providing estimates of sensorimotor loop delays in balance control. A robotic balance simulator introduced artificial delays (50-400 ms) between the participants’ motor commands and resulting whole-body movements. Participants balanced for up to 20 seconds or until a ‘virtual fall’ occurred (exceeding 3° posterior or 6° anterior). Logistic regression analysis using the number of ‘virtual falls’ at each delay was performed to obtain a threshold of stability (5% probability of falling). Maintaining balance became more difficult as delays increased: the number of ‘virtual falls’ and standard deviation of angular backboard displacement increased, while the time to fall decreased as delays increased. The mean threshold of stability was 98 ± 38 ms. In response to the tilt perturbations, short and medium latency responses were observed in Sol (50.8 ± 3.2 ms) and TA (98 ± 10 ms), respectively. Long latency responses in TA, Sol and mGas were 147 ± 12 ms, 166 ± 22 ms, and 178 ± 27ms respectively. There were no correlations between thresholds of balance stability on the robot or the evoked-balance responses and age. A weak association between long latency responses in TA and thresholds of stability was observed. My results support the postulation that balance control becomes unstable as delays in balance control increase. The weak correlation between estimates of sensorimotor delays and thresholds of stability on the robot, however, suggests these measures target different pathways involved in standing balance.
Design and Simulation of a Heat Exchanger for a Mechanical Coffee Dryer
Creators: name: Botello, Joshua
name: Denton, Russell
Publisher: name: Unknown
Year: 2023
Subjects: subject: Mechanical Engineering
subject: FOS: Mechanical engineering
subject: Heat Transfer
subject: Heat exchangers
subject: Mechanical Coffee Dryer
subject: Heat Exchanger
subject: Heat Transfer
subject: Coffee Processing

description: The drying of coffee is a critical aspect of the post-harvest process and plays a crucial
role in achieving high-quality coffee. The drying process requires significant energy to remove
moisture from the harvested beans, emphasizing the importance of using efficient equipment and
sustainable sources. The capstone project focuses on designing a heat exchanger for a
mechanical coffee drying system that uses biomass combustion. This report briefly covers coffee
processing, heat exchangers, and computational fluid dynamics. The project compared various
heat exchangers and deemed that a shell and tube heat exchanger could meet the requirements of
drying 1000 kg of coffee. The project deliverables include a validation study for SolidWorks
Flow Simulation 2023, a 3D model of the heat exchanger, and heat and flow simulations. Due to
time constraints, there was no constructed physical prototype. Kern’s method was used to
produce a thermal-hydraulic design for the first iteration of the shell and tube heat exchanger,
and SolidWorks was used to adjust key geometric parameters until the drying goals were met. A
validation study of conjugate heat transfer involving laminar and turbulent, incompressible flow
in SolidWorks Flow Simulation 2023 was conducted with a max deviation of 3.8% from
analytical results. The final heat exchanger design consisted of 19 (44 mm x 50 mm) tubes of
321 stainless steel alloy, one baffle cut 75%, and the tube bundle was 3.25 meters long with a
325.7 mm inner shell diameter. The weight of the tube bundle was 232 kg. The simulated air
outlet temperature value reached 51.5°C, producing a pressure drop of 2890 Pascals. The power
requirement to overcome pressure drop was calculated to be 4.9 kW, and the effectiveness of the
simulated heat exchanger was 72.9%. A mesh convergence study was conducted to confirm the
robustness of the simulation at 1.4 million cells.
Democratizing IC Design: The SSCS PICO Program
Creators: name: Murmann, Boris
Publisher: name: Zenodo
Year: 2021
Subjects: SSCS PICO Program
IC design

description: Over the past several decades, society has strongly benefited from free and open-source software. More recently, the open-source spirit has expanded to hardware and has energized a new maker community that collaboratively tinkers with embedded systems at the printed circuit board level. Recent developments have now also opened the door toward democratizing integrated circuit (IC) design and enabling open and global collaboration. With the recent launch of its Platform for IC Design Outreach (PICO) program, the IEEE Solid-State Circuit Society is working with the open-source community to help accelerate the construction of the required ecosystem. The program will provide education, mentoring and collaboration opportunities as well as design contests and sponsored fabrication runs. This talk will provide an overview of this program and its goals.
Herschel ATLAS: The cosmic star formation history of quasar host galaxies
Creators: name: Serjeant, S.
name: Bertoldi, F.
name: Blain, A. W.
name: Clements, D. L.
name: Cooray, A.
name: Danese, L.
name: Dunlop, J.
name: Dunne, L.
name: Eales, S.
name: Falder, J.
name: Hatziminaoglou, E.
name: Hughes, D. H.
name: Ibar, E.
name: Jarvis, M. J.
name: Lawrence, A.
name: Lee, M. G.
name: Michałowski, M.
name: Negrello, M.
name: Omont, A.
name: Page, M.
name: Pearson, C.
name: van der Werf, P. P.
name: White, G.
name: Amblard, A.
name: Auld, R.
name: Baes, M.
name: Bonfield, D. G.
name: Burgarella, D.
name: Buttiglione, S.
name: Cava, A.
name: Dariush, A.
name: de Zotti, G.
name: Dye, S.
name: Frayer, D.
name: Fritz, J.
name: Gonzalez-Nuevo, J.
name: Herranz, D.
name: Ivison, R. J.
name: Lagache, G.
name: Leeuw, L.
name: Lopez-Caniego, M.
name: Maddox, S.
name: Pascale, E.
name: Pohlen, M.
name: Rigby, E.
name: Rodighiero, G.
name: Samui, S.
name: Sibthorpe, B.
name: Smith, D. J. B.
name: Temi, P.
name: Thompson, M.
name: Valtchanov, I.
name: Verma, A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a derivation of the star formation rate per comoving volume of quasar host galaxies, derived from stacking analyses of far-infrared to mm-wave photometry of quasars with redshifts 0I_AB>-32. We use the science demonstration observations of the first ~16 deg^2 from the Herschel Astrophysical Terahertz Large Area Survey (H-ATLAS) in which there are 240 quasars from the Sloan Digital Sky Survey (SDSS) and a further 171 from the 2dF-SDSS LRG and QSO (2SLAQ) survey. We supplement this data with a compilation of data from IRAS, ISO, Spitzer, SCUBA and MAMBO. H-ATLAS alone statistically detects the quasars in its survey area at >5sigma at 250, 350 and 500um. From the compilation as a whole we find striking evidence of downsizing in quasar host galaxy formation: low-luminosity quasars with absolute magnitudes in the range -22>I_AB>-24 have a comoving star formation rate (derived from 100um rest-frame luminosities) peaking between redshifts of 1 and 2, while high-luminosity quasars with I_ABI_AB>-24 quasars evolves as (1+z)^{2.3 +/- 0.7} at z<2, but the evolution at higher luminosities is much faster reaching (1+z)^{10 +/- 1} at -26>I_AB>-28. We tentatively interpret this as a combination of a declining major merger rate with time and gas consumption reducing fuel for both black hole accretion and star formation.
description: Accepted by Astronomy and Astrophysics, Herschel special issue
eSports-Athletinnen und -Athleten als Botschafter gesundheitsförderlicher Verhaltensweisen? Was können Fachpersonen der Gesundheitsförderung und (Sucht-)Prävention von eSportlerinnen und eSportlern in Bezug auf die Prävention der Internet Gaming Disorder lernen?
Creators: name: Gerber, Jan-Michael
Publisher: name: Zenodo
Year: 2020

description: Gemäss der JAMES-Studie 2018 der Zürcher Hochschule für Angewandte Wissenschaften (ZHAW), spielen bis 51% der Schweizer Kinder und Jugendlichen im Alter zwischen 12 und 19 Jahren in ihrer Freizeit Computer- und Videospiele (Lilian Suter, Gregor Waller, Jael Bernath, Céline Külling, Isabel Willemse und Daniel Süss, 2018, S. 29). Suchtfachstellen verzeichnen eine Zunahme an Anfragen von Eltern zum Thema Gamesucht (Christian Ingold und Jan-Michael Gerber, 2020, S. 1) und Studien über die Internet Gaming Disorder (IGD) haben seit 2005 stark zugenommen (Wendy Feng, Danielle E. Ramo, Steven R. Chan und James A. Bourgeois, 2017, S. 18). Die Studie eSports Schweiz (2019) zeigt, dass die Disziplin des eSports auch in der Schweiz weiter an Popularität gewinnt (Marcel Hüttermann, 2019, S. 6). Anhand von Literatur-recherchen zeigt diese Arbeit die Komplexität des Phänomens Sucht und der Internet Gaming Disorder im Besonderen auf und legt die Risikofaktoren und Komorbiditäten dieser Verhaltens-sucht dar. Ebenfalls durch Literaturrecherchen erhobene Informationen führen die Lesenden in den eSports ein. Das so zusammengetragene Wissen wird mit den Erkenntnissen aus qualitativen Interviews mit eSportlerinnen und eSportlern aus der Schweiz kombiniert und zeigt auf, welche gesundheitsförderlichen Strategien die Spielenden anwenden, um sich einer Internet Gaming Dis-order zu entziehen. Diese Erkenntnisse wiederum werden den bestehenden Massnahmen der uni-versellen Prävention und Gesundheitsförderung gegenübergestellt und bestätigen diese. Mögliche Anpassungen und Weiterentwicklungen werden vor allem für den Bereich der Früherkennung und Frühintervention vorgeschlagen.
description: + Code Diss LU: hslusa mas pg + Fussnote: Master-Arbeit MAS Prävention und Gesundheitsförderung, Hochschule Luzern – Soziale Arbeit, 2020 + NL-Code: NLLUHSA202012
Semiparametric GARCH via Bayesian Model Averaging
Creators: name: Chen, Wilson Ye
name: Gerlach, Richard H.
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Physiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Cancer

description: As the dynamic structure of financial markets is subject to dramatic change, a model capable of providing consistently accurate volatility estimates should not make rigid assumptions on how prices change over time. Most volatility models impose a particular parametric functional form that relates an observed price change to a volatility forecast (news impact function). Here, a new class of functional coefficient semiparametric volatility models is proposed, where the news impact function is allowed to be any smooth function. The ability of the proposed model to estimate volatility is studied and compared to the well-known parametric proposals, in both a simulation study and an empirical study with real financial market data. The news impact function is estimated using a Bayesian model averaging approach, implemented via a carefully developed Markov chain Monte Carlo sampling algorithm. Using simulations it is shown that the proposed flexible semiparametric model is able to learn the shape of the news impact function very effectively, from observed data. When applied to real financial time series, the proposed model suggests that news impact functions have quite different shapes over different asset types, but a consistent shape within the same asset class. Supplementary materials for this article are available online.
Ab initio many-body calculations of deuteron-4He scattering and 6Li states
Creators: name: Navratil, Petr
name: Quaglioni, Sofia
Publisher: name: arXiv
Year: 2011
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We extend the ab initio no-core shell model/resonating-group method (NCSM/RGM) to projectile-target binary-cluster states where the projectile is a deuteron. We discuss the formalism in detail and give algebraic expressions for the integration kernels. Using a soft similarity-renormalization-group evolved chiral nucleon-nucleon potential, we calculate deuteron-4He scattering and investigate 6Li bound and unbound states. Virtual three-body breakup effects are obtained in an approximated way by including excited pseudo-states of the deuteron in the calculation. We compare our results to experiment and to a standard NCSM calculation for 6Li.
description: 14 pages, 13 figures
Fermions and Goldstone bosons in an asymptotically safe model
Creators: name: Bazzocchi, F.
name: Fabbrichesi, M.
name: Percacci, R.
name: Tonero, A.
name: Vecchi, L.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider a model in which Goldstone bosons, described by a SU(N) chiral nonlinear sigma model, are coupled to an N-plet of colored fermions by means of a Yukawa interaction. We study the one-loop renormalization group flow and show that the non-Gaussian UV fixed point, which is present in the purely bosonic model, is lost because of fermion loop effects unless N is sufficiently large. We then add four-fermion contact interactions to the lagrangian and show that in this case there exist several non-Gaussian fixed points. The strength of the contact interactions, predicted by the requirement that the theory flows towards a fixed point in the UV, is compared to the current experimental bounds. This toy model could provide an important building block of an asymptotically safe model of the weak interactions.
description: 7 pages, 3 figures, 1 table
Application of molybdenum (and zinc) stable isotopes to trace geochemical attenuation in mine waste
Creators: name: Skierszkan, Elliott Karl
Publisher: name: University of British Columbia
Year: 2018

description: Mining activities generate tremendous quantities of waste rock and tailings that must be carefully managed to prevent contamination of water resources by metal-leaching. Proper environmental management of mine drainage requires a detailed understanding of the mechanisms that control the mobility of metals in mine waste. This thesis applied stable-isotope analyses of molybdenum (Mo) and zinc (Zn) to constrain the geochemical attenuation processes controlling transport of these metals in mine waste. The key outcomes of this work are: (1) the establishment of a robust protocol for determining high-precision Mo isotope ratios in mine-waste samples using double-spike multi-collector inductively coupled plasma mass-spectrometry; (2) the demonstration that mine drainage at field sites becomes enriched in heavy Mo isotopes because Mo attenuation preferentially removes light isotopes; the predominant Mo attenuation mechanisms considered being sorption onto (oxyhydr)oxides and precipitation of molybdate minerals; (3) the demonstration that mine drainage becomes depleted in heavy Zn isotopes under alkaline pH conditions because of preferential removal of heavy Zn isotopes during Zn adsorption and/or precipitation of secondary minerals; and (4) the determination of new Mo isotopic fractionation factors for the precipitation of powellite (CaMoO₄) and wulfenite (PbMoO₄)—important sinks of Mo in mine waste environments. Overall, this thesis demonstrates that metal stable isotope analyses are an informative new tool now available to trace the processes that control metal transport in the environment. Further improvements in the quantification of metal removal using stable isotopic analyses should become possible with ongoing research into the causes of metal stable isotope fractionation.
Bilayer membranes in micro-fluidics: from gel emulsions to soft functional devices
Creators: name: Thutupalli, Shashi
name: Herminghaus, Stephan
name: Seemann, Ralf
Publisher: name: arXiv
Year: 2010
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: We outline a concept of self-assembled soft matter devices based on micro-fluidics, which use surfactant bilayer membranes as their main building blocks, arrested in geometric structures provided by top-down lithography. Membranes form spontaneously when suitable water-in-oil emulsions are forced into micro-fluidic channels at high dispersed-phase volume fractions. They turn out to be remarkably stable even when pumped through the micro-fluidic channel system. Their geometric arrangement is self-assembling, driven by interfacial energy and wetting forces. The ordered membrane arrays thus emerging can be loaded with amphiphilic functional molecules, ion channels, or just be used as they are, exploiting their peculiar physical properties. For wet electronic circuitry, the aqueous droplets then serve as the 'solder points'. Furthermore, the membranes can serve as well-controlled coupling media between chemical processes taking place in adjacent droplets. This is shown for the well-known Belousov-Zhabotinski reaction. Suitable channel geometries can be used to (re-) arrange the droplets, and thereby their contents, in a controlled way by just moving the emulsion through the device. It thereby appears feasible to construct complex devices out of molecular-size components in a self-assembled, but well controlled manner.
description: 10 pages, 11 figures
Clouds and Hazes in GJ 1214b's Metal-Rich Atmosphere
Creators: name: Malsky, Isaac
name: Rauscher, Emily
name: Stevenson, Kevin
name: Savel, Arjun B.
name: Steinrueck, Maria E.
name: Gao, Peter
name: Kempton, Eliza M. -R.
name: Roman, Michael T.
name: Bean, Jacob L.
name: Zhang, Michael
name: Parmentier, Vivien
name: Piette, Anjali A. A.
name: Kataria, Tiffany
Publisher: name: arXiv
Year: 2025
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The sub-Neptune GJ 1214b has an infamously flat transmission spectrum, likely due to thick aerosols in its atmosphere. A recent JWST MIRI spectroscopic phase curve of GJ 1214 b added to this picture, suggesting a highly reflective and metal-rich atmosphere. Using a 3D General Circulation Model with both photochemical hazes and condensate clouds, we characterize how different aerosol types affect the atmospheric structure of GJ 1214 b and manifest in its spectroscopic phase curve. Additionally, we reanalyze the original GJ 1214 b JWST phase curve. The reanalysis shows a hotter nightside, similar dayside temperature, and a lower, but still elevated, Bond albedo (0.42 +/- 0.11) than the original results. We find that a scenario with both clouds and hazes is most consistent with the JWST phase curve. Reflective clouds or hazes are needed to explain the large Bond albedo, and hazes or a super-solar metallicity help account for the several hundred Kelvin day-night temperature difference measured by the phase curve.
Exponential-Type GARCH Models With Linear-in-Variance Risk Premium
Creators: name: Hafner, Christian M.
name: Kyriakopoulou, Dimitra
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Biotechnology
subject: 69999 Biological Sciences not elsewhere classified
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Cancer
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Science Policy
subject: Plant Biology

description: One of the implications of the intertemporal capital asset pricing model is that the risk premium of the market portfolio is a linear function of its variance. Yet, estimation theory of classical GARCH-in-mean models with linear-in-variance risk premium requires strong assumptions and is incomplete. We show that exponential-type GARCH models such as EGARCH or Log-GARCH are more natural in dealing with linear-in-variance risk premia. For the popular and more difficult case of EGARCH-in-mean, we derive conditions for the existence of a unique stationary and ergodic solution and invertibility following a stochastic recurrence equation approach. We then show consistency and asymptotic normality of the quasi-maximum likelihood estimator under weak moment assumptions. An empirical application estimates the dynamic risk premia of a variety of stock indices using both EGARCH-M and Log-GARCH-M models. Supplementary materials for this article are available online.
Homogeneity Pursuit in Single Index Models based Panel Data Analysis
Creators: name: Lian, Heng
name: Qiao, Xinghao
name: Zhang, Wenyang
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Science Policy
subject: Plant Biology

description: Panel data analysis is an important topic in statistics and econometrics. Traditionally, in panel data analysis, all individuals are assumed to share the same unknown parameters, e.g. the same coefficients of covariates when the linear models are used, and the differences between the individuals are accounted for by cluster effects. This kind of modelling only makes sense if our main interest is on the global trend, this is because it would not be able to tell us anything about the individual attributes which are sometimes very important. In this paper, we propose a modelling based on the single index models embedded with homogeneity for panel data analysis, which builds the individual attributes in the model and is parsimonious at the same time. We develop a data driven approach to identify the structure of homogeneity, and estimate the unknown parameters and functions based on the identified structure. Asymptotic properties of the resulting estimators are established. Intensive simulation studies conducted in this paper also show the resulting estimators work very well when sample size is finite. Finally, the proposed modelling is applied to a public financial dataset and a UK climate dataset, the results reveal some interesting findings.
A method to determine distances to molecular clouds using near-IR photometry
Creators: name: Maheswar, G.
name: Lee, C. -W.
name: Bhatt, H. C.
name: Mallik, S. V.
name: Dib, Sami
Publisher: name: arXiv
Year: 2010
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Aims: We aim to develop a method to determine distances to molecular clouds using JHK near-infrared photometry. Methods: The method is based on a technique that aids spectral classification of stars lying towards the fields containing the clouds into main sequence and giants. In this technique, the observed (J-H) and (H-K_s) colours are dereddened simultaneously using trial values of A V and a normal interstellar extinction law. The best fit of the dereddened colours to the intrinsic colours giving a minimum value of Chi^2 then yields the corresponding spectral type and A_V for the star. The main sequence stars, thus classified, are then utilized in an A V versus distance plot to bracket the cloud distances. Results: We applied the method to four clouds, L1517, Chamaeleon I, Lupus 3 and NGC 7023 and estimated their distances as 167+-30, 151+-28, 157+-29 and 408+-76 pc respectively, which are in good agreement with the previous distance estimations available in the literature
description: Published in A&A, 2010, 509, 44. Accepted 23 september 2009
Quasi-unitary equivalence and generalised norm resolvent convergence
Creators: name: Post, Olaf
name: Simmer, Jan
Publisher: name: arXiv
Year: 2025
Subjects: subject: Spectral Theory (math.SP)
subject: FOS: Mathematics

description: The purpose of this article is to give a short introduction to the concept of quasi-unitary equivalence of quadratic forms and its consequences. In particular, we improve an estimate concerning the transitivity of quasi-unitary equivalence for forms. We illustrate the abstract setting by two classes of examples.
description: 20 pages, this is a submission of an already published article, reference list is as at time of publication
Herschel-ATLAS: Dust temperature and redshift distribution of SPIRE and PACS detected sources using submillimetre colours
Creators: name: Amblard, A.
name: Cooray, A.
name: Serra, P.
name: Temi, P.
name: Barton, E.
name: Negrello, M.
name: Auld, R.
name: Baes, M.
name: Baldry, I. K.
name: Bamford, S.
name: Blain, A.
name: Bock, J.
name: Bonfield, D.
name: Burgarella, D.
name: Buttiglione, S.
name: Cameron, E.
name: Cava, A.
name: Clements, D.
name: Croom, S.
name: Dariush, A.
name: de Zotti, G.
name: Driver, S.
name: Dunlop, J.
name: Dunne, L.
name: Dye, S.
name: Eales, S.
name: Frayer, D.
name: Fritz, J.
name: Gardner, Jonathan P.
name: Gonzalez-Nuevo, J.
name: Herranz, D.
name: Hill, D.
name: Hopkins, A.
name: Hughes, D. H.
name: Ibar, E.
name: Ivison, R. J.
name: Jarvis, M.
name: Jones, D. H.
name: Kelvin, L.
name: Lagache, G.
name: Leeuw, L.
name: Liske, J.
name: Lopez-Caniego, M.
name: Loveday, J.
name: Maddox, S.
name: Michalowski, M.
name: Norberg, P.
name: Parkinson, H.
name: Peacock, J. A.
name: Pearson, C.
name: Pascale, E.
name: Pohlen, M.
name: Popescu, C.
name: Prescott, M.
name: Robotham, A.
name: Rigby, E.
name: Rodighiero, G.
name: Samui, S.
name: Sansom, A.
name: Scott, D.
name: Serjeant, S.
name: Sharp, R.
name: Sibthorpe, B.
name: Smith, D. J. B.
name: Thompson, M. A.
name: Tuffs, R.
name: Valtchanov, I.
name: Van Kampen, E.
name: Van der Werf, P.
name: Verma, A.
name: Vieira, J.
name: Vlahakis, C.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present colour-colour diagrams of detected sources in the Herschel-ATLAS Science Demonstration Field from 100 to 500 microns using both PACS and SPIRE. We fit isothermal modified black bodies to the spectral energy distribution (SED) to extract the dust temperature of sources with counterparts in Galaxy And Mass Assembly (GAMA) or SDSS surveys with either a spectroscopic or a photometric redshift. For a subsample of 330 sources detected in at least three FIR bands with a significance greater than 3 $σ$, we find an average dust temperature of $(28 \pm 8)$K. For sources with no known redshift, we populate the colour-colour diagram with a large number of SEDs generated with a broad range of dust temperatures and emissivity parameters, and compare to colours of observed sources to establish the redshift distribution of this sample. For another subsample of 1686 sources with fluxes above 35 mJy at 350 microns and detected at 250 and 500 microns with a significance greater than 3$σ$, we find an average redshift of $2.2 \pm 0.6$.
description: 5 pages; accepted for publication in A&A Special Issue on Herschel First Science Results (July 2010). H-ATLAS information available at http://www.h-atlas.org
Semiparametric Estimation of First-Price Auction Models
Creators: name: Aryal, Gaurab
name: Gabrielli, Maria F.
name: Vuong, Quang
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Molecular Biology
subject: Neuroscience
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Plant Biology
subject: FOS: Biological sciences

description: In this article, we propose a two-step semiparametric procedure to estimate first-price auction models. In the first step, we estimate the bid density and distribution using local polynomial method, and recover a sample of (pseudo) private values. In the second step, we apply the method of moments to the sample of private values to estimate a finite set of parameters that characterize the density of private values. We show that our estimator attains the parametric consistency rate and is asymptotically normal. And we also determine its asymptotic variance. The advantage of our approach is that it can accommodate multiple auction covariates. Monte Carlo exercises show that the estimator performs well both in estimating the value density and in choosing the revenue maximizing reserve price. Supplementary materials for this article are available online.
W asymmetries at CDF and D0
Creators: name: Schellman, H.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We present recent W and charged lepton asymmetry measurements from the CDF and D0 experiments. Theoretical predictions agree with the CDF W asymmetry, measured using a new matrix element technique. These theoretical predictions are less consistent with the latest lepton asymmetry measurements from D0 and CDF, especially for high charged lepton transverse momentum.
description: 6 pages, 6 figures
The radio properties of infrared-faint radio sources
Creators: name: Middelberg, Enno
name: Norris, Ray P.
name: Hales, Christopher A.
name: Seymour, Nick
name: Johnston-Hollitt, Melanie
name: Huynh, Minh T.
name: Lenc, Emil
name: Mao, Minnie Y.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Infrared-faint radio sources (IFRS) are objects that have flux densities of several mJy at 1.4GHz, but that are invisible at 3.6um when using sensitive Spitzer observations with uJy sensitivities. Their nature is unclear and difficult to investigate since they are only visible in the radio. High-resolution radio images and comprehensive spectral coverage can yield constraints on the emission mechanisms of IFRS and can give hints to similarities with known objects. We imaged a sample of 17 IFRS at 4.8GHz and 8.6GHz with the Australia Telescope Compact Array to determine the structures on arcsecond scales. We added radio data from other observing projects and from the literature to obtain broad-band radio spectra. We find that the sources in our sample are either resolved out at the higher frequencies or are compact at resolutions of a few arcsec, which implies that they are smaller than a typical galaxy. The spectra of IFRS are remarkably steep, with a median spectral index of -1.4 and a prominent lack of spectral indices larger than -0.7. We also find that, given the IR non-detections, the ratio of 1.4GHz flux density to 3.6um flux density is very high, and this puts them into the same regime as high-redshift radio galaxies. The evidence that IFRS are predominantly high-redshift sources driven by active galactic nuclei (AGN) is strong, even though not all IFRS may be caused by the same phenomenon. Compared to the rare and painstakingly collected high-redshift radio galaxies, IFRS appear to be much more abundant, but less luminous, AGN-driven galaxies at similar cosmological distances.
description: 14 pages, 6 Figures, accepted for publication in A&A
States on pseudo effect algebras and integrals
Creators: name: Dvurecenskij, Anatolij
Publisher: name: arXiv
Year: 2010
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 81P15, 03G12, 03B50

description: We show that every state on an interval pseudo effect algebra $E$ satisfying some kind of the Riesz Decomposition Properties (RDP) is an integral through a regular Borel probability measure defined on the Borel $σ$-algebra of a Choquet simplex $K$. In particular, if $E$ satisfies the strongest type of (RDP), the representing Borel probability measure can be uniquely chosen to have its support in the set of the extreme points of $K.$
The atmospheric entry of cometary impactors
Creators: name: Anslow, Richard J
name: Bonsor, Amy
name: Todd, Zoe R
name: Wordsworth, Robin
name: Rae, Auriol S P
name: McDonald, Catriona H
name: Rimmer, Paul B
Publisher: name: arXiv
Year: 2025
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Cometary impacts play an important role in the early evolution of Earth, and other terrestrial exoplanets. Here, we present a numerical model for the interaction of weak, low-density cometary impactors with planetary atmospheres, which includes semi-analytical parameterisations for the ablation, deformation, and fragmentation of comets. Deformation is described by a pancake model, as is appropriate for weakly cohesive, low-density bodies, while fragmentation is driven by the growth of Rayleigh-Taylor instabilities. The model retains sufficient computational simplicity to investigate cometary impacts across a large parameter space, and permits simple description of the key physical processes controlling the interaction of comets with the atmosphere. We apply our model to two case studies. First, we consider the cometary delivery of prebiotic feedstock molecules. This requires the survival of comets during atmospheric entry, which is determined by three parameters: the comet's initial radius, bulk density, and atmospheric surface density. There is a sharp transition between the survival and catastrophic fragmentation of comets at a radius of about 150m, which increases with increasing atmospheric surface density and decreasing cometary density. Second, we consider the deposition of mass and kinetic energy in planetary atmospheres during cometary impacts, which determines the strength and duration of any atmospheric response. We demonstrate that mass loss is dominated by fragmentation, not ablation. Small comets deposit their entire mass within a fraction of an atmospheric scale height, at an altitude determined by their initial radius. Large comets lose only a small fraction of their mass to ablation in the lower atmosphere.
description: 17 pages, 8 figures, accepted for publication in MNRAS
Finite sampling effects on generalized fluctuation-dissipation relations for steady states
Creators: name: Gomez-Solano, Juan Ruben
name: Petrosyan, Artem
name: Ciliberto, Sergio
Publisher: name: arXiv
Year: 2011
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study the effects of the finite number of experimental data on the computation of a generalized fluctuation-dissipation relation around a nonequilibrium steady state of a Brownian particle in a toroidal optical trap. We show that the finite sampling has two different effects, which can give rise to a poor estimate of the linear response function. The first concerns the accessibility of the generalized fluctuation-dissipation relation due to the finite number of actual perturbations imposed to the control parameter. The second concerns the propagation of the error made at the initial sampling of the external perturbation of the system. This can be highly enhanced by introducing an estimator which corrects the error of the initial sampled condition. When these two effects are taken into account in the data analysis, the generalized fluctuation-dissipation relation is verified experimentally.
Thermodynamics of the HMF model with a magnetic field
Creators: name: Chavanis, Pierre-Henri
Publisher: name: arXiv
Year: 2010
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study the thermodynamics of the Hamiltonian Mean Field (HMF) model with an external potential playing the role of a "magnetic field". If we consider only fully stable states, this system does not present any phase transition. However, if we take into account metastable states (for a restricted class of perturbations), we find a very rich phenomenology. In particular, the system displays a region of negative specific heats in the microcanonical ensemble in which the temperature decreases as the energy increases. This leads to ensembles inequivalence and to zeroth order phase transitions similar to the "gravothermal catastrophe" and to the "isothermal collapse" of self-gravitating systems. In the present case, they correspond to the reorganization of the system from an "anti-aligned" phase (magnetization pointing in the direction opposite to the magnetic field) to an "aligned" phase (magnetization pointing in the same direction as the magnetic field). We also find that the magnetic susceptibility can be negative in the microcanonical ensemble so that the magnetization decreases as the magnetic field increases. The magnetic curves can take various shapes depending on the values of energy or temperature. We describe hysteretic cycles involving positive or negative susceptibilities. We also show that this model exhibits gaps in the magnetization at fixed energy, resulting in ergodicity breaking.