cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Dynamical Analysis on Gene Activity in the Presence of Repressors and an Interfering Promoter
Creators: name: Nakanishi, Hiizu
name: Mitarai, Namiko
name: Sneppen, Kim
Publisher: name: arXiv
Year: 2008
Subjects: subject: Molecular Networks (q-bio.MN)
subject: Quantitative Methods (q-bio.QM)
subject: FOS: Biological sciences

description: Transcription is regulated through interplay between transcription factors, an RNA polymerase(RNAP), and a promoter. Even for a simple repressive transcription factor that disturbs promoter activity at the initial binding of RNAP, its repression level is not determined solely by the dissociation constant of transcription factor but is sensitive to the time scales of processes in RNAP. We first analyse the promoter activity under strong repression by a slow binding repressor, in which case transcriptions occur in a burst, followed by a long quiescent period while a repressor binds to the operator; the number of transcriptions, the bursting and the quiescent times are estimated by reaction rates. We then examine interference effect from an opposing promoter, using the correlation function of transcription initiations for a single promoter. The interference is shown to de-repress the promoter because RNAP's from the opposing promoter most likely encounter the repressor and remove it in case of strong repression. This de-repression mechanism should be especially prominent for the promoters that facilitate fast formation of open complex with the repressor whose binding rate is slower than about 1/sec. Finally, we discuss possibility of this mechanism for high activity of promoter PR in the hyp-mutant of lambda phage.
description: supplement is attached
Additional file 1 of Performance of waist-to-height ratio as a screening tool for identifying cardiometabolic risk in children: a meta-analysis
Creators: name: Jiang, Yuan
name: Dou, Yalan
name: Chen, Hongyan
name: Zhang, Yi
name: Chen, Xiaotian
name: Wang, Yin
name: Rodrigues, Myanca
name: Yan, Weili
Publisher: name: figshare
Year: 2021
Subjects: Biochemistry
Medicine
Cell Biology
Pharmacology
Biotechnology
Biological Sciences not elsewhere classified
Science Policy

description: Additional file 1. The search strategy used in PubMed of this work.
High-field specific heat and entropy obtained from adiabatic temperature change
Creators: name: Paixão, L. S.
name: Usuda, E. O.
name: Imamura, W.
name: Carvalho, A. M. G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Specific heat and entropy are relevant thermodynamic properties, which may be used as macroscopic probes to microscopic properties of materials under ambient conditions and under high applied fields. However, the measurement of specific heat under intense external fields can be a challenging task, as well as to obtain the entropy in the same conditions. Here, we describe a method to obtain high-field specific heat and entropy from measurements of specific heat under ambient conditions and direct temperature change induced by adiabatic field changes. We derive straightforward thermodynamic equations to calculate the specific heat and entropy and our results agree satisfactorily with experimental data of specific heat under magnetic field, electric field, and pressure.
Additional file 1 of Continuous use of glycomacropeptide in the nutritional management of patients with phenylketonuria: a clinical perspective
Creators: name: Pena, Maria João
name: Pinto, Alex
name: Almeida, Manuela Ferreira De
name: Barbosa, Catarina De Sousa
name: Ramos, Paula Cristina
name: Rocha, Sara
name: Guimas, Arlindo
name: Ribeiro, Rosa
name: Martins, Esmeralda
name: Bandeira, Anabela
name: Dias, Cláudia Camila
name: MacDonald, Anita
name: Borges, Nuno
name: Rocha, Júlio César
Publisher: name: figshare
Year: 2021
Subjects: subject: Biochemistry
subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Physiology
subject: Pharmacology
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Cancer

description: Additional file 1. Supplementary data.
Intermediate left-right gauge symmetry, unification of couplings and fermion masses in SUSY $SO(10)\times S_4$
Creators: name: Parida, M. K.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: If left-right gauge theory occurs as an intermediate symmetry in a GUT then, apart from other advantages, it is possible to obtain the see-saw scale necessary to understand small neutrino masses with Majorana coupling of order unity. Barring threshold or non-renormalizable gravitational effects, or assumed presence of additional light scalar particles of unprescribed origin, all other attempts to achieve manifest one-loop gauge coupling unification in SUSY SO(10) with left-right intermediate symmetry have not been successful so far. Attributing this failure to lack of flavor symmetry in the GUT, we show how the spontaneous symmetry breaking of $SO(10)\times S_4$ leads to such intermediate scale extending over a wide range, $M_R \simeq 5\times 10^{9}$ GeV to $10^{15}$ GeV. All the charged fermion masses are fitted at the see-saw scale, $M_N\simeq M_R \simeq 4 \times 10^{13}$ GeV which is obtained with Majorana coupling $f_0 \simeq 1$. Using a constrained parametrization in which CP-violation originates only from quark sector, besides other predictions made in the neutrino sector, the reactor mixing angle is found to be $θ_{13} \simeq 3^{\circ} - 5^{\circ}$ which is in the range accessible to ongoing and planned experiments. The leptonic Dirac phase turns out to be $δ\sim 2.9- 3.1$ radians with Jarlskog invariant $J \sim 2.95 \times 10^{-5} - 10^{-3}$.
description: Minor clarification and few references added to match the published version
Exceeding 23% Screen-Printed Rear-Emitter Bifacial n-PERT Cells
Creators: name: Choulat, P.
name: Singh, S.
name: Tous, L.
name: Chen, J.
name: Liu, Z.
name: Duerinckx, F.
name: Gordon, I.
name: Szlufcik, J.
Publisher: name: WIP
Year: 2019
Subjects: Silicon Materials and Cells
Homojunction Solar Cells

description: 36th European Photovoltaic Solar Energy Conference and Exhibition; 157-160
description: This work reports the latest results at imec of rear emitter bifacial Passivated Emitter, Rear Totally diffused (PERT) cells, processed on large area (243.3 cm2), 170 µm thick n-type Cz substrates. The cells feature a selective front side surface field (FSF) formed by laser doping using phosphorous silicate glass (PSG) as dopant source from POCl3 diffusion and a homogeneous rear Boron emitter with local p+ back surface field (BSF) formed during contact firing of Aluminium paste fingers. The FSF and rear emitter are passivated with thermal oxide (SiO2) + PECVD Silicon Nitride (SiNx), and with atomic layer deposited (ALD) Al2O3 + a stack of PECVD SiOx/SiNx respectively. The cells are fully screen-printed with 12 busbars and solderable Ag pads on the rear. We achieve an average cell efficiency of 23.10.1% with the best cell efficiency of 23.2% (both independently confirmed) with a reverse current (Irev) below 0.5A at -12V.
Transient rectification of Brownian diffusion with asymmetric initial distribution
Creators: name: Plyukhin, A. V.
name: Froese, A. M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: In an ensemble of non-interacting Brownian particles, a finite systematic average velocity may temporarily develop, even if it is zero initially. The effect originates from a small nonlinear correction to the dissipative force, causing the equation for the first moment of velocity to couple to moments of higher order. The effect may be relevant when a complex system dissociates in a viscous medium with conservation of momentum.
Additional file 7 of CircRNF220, not its linear cognate gene RNF220, regulates cell growth and is associated with relapse in pediatric acute myeloid leukemia
Creators: name: Liu, Xiaodan
name: Liu, Xiaoping
name: Cai, Mansi
name: Luo, Ailing
name: He, Yingyi
name: Liu, Sha
name: Zhang, Xiaohong
name: Yang, Xu
name: Xu, Ling
name: Jiang, Hua
Publisher: name: figshare
Year: 2021
Subjects: subject: Biophysics
subject: Biochemistry
subject: Physical Sciences not elsewhere classified
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Biological Sciences not elsewhere classified
subject: Cancer
subject: Hematology

description: Additional file 7: Supplementary Table S3. Sequences of the PCR primers in this study (5’-3’).
HST/STIS spectroscopy of the environment in the starburst core of M82
Creators: name: Westmoquette, M. S.
name: Smith, L. J.
name: Gallagher, J. S.
name: O'Connell, R. W.
name: Rosario, D. J.
name: de Grijs, R.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: [Abridged] We present high-resolution optical HST/STIS observations made with two slits crossing four of the brightest starburst clumps in the vicinity of the nucleus of M82. These provide H_alpha kinematics, extinction, electron density and emission measures. From the radial velocity curves we confirm the presence of a stellar bar, and find that the super star cluster M82-A1 has a position and radial velocity consistent with it being at the end of one of the unique x2 bar orbits formed by an inner Lindblad resonance. We derive a new model for the orientation of the bar and disc with respect to the main starburst clumps, and propose that clump A has formed within the bar region as a result of gas interactions between the bar orbits, whereas region C lies at the edge of the bar and regions D and E are located further out from the nucleus but heavily obscured. We derive extremely high interstellar densities, corresponding to ISM pressures of P/k ~ 0.5-1.0 x 10^7 cm^-3 K, and discuss the implications of the measured gas properties surrounding the nuclear star clusters on the production and evolution of the galactic wind. Despite varying pressures, the ionization parameter is uniform down to parsec-scales, and we discuss why this might be so. Where the S/N of our spectra are high enough, we identify multiple emission-line components. Through detailed Gaussian line-fitting, we identify a ubiquitous broad (200-300 km/s) underlying component to the bright H_alpha line, and discuss the physical mechanism(s) that could be responsible for such widths. We conclude that the evaporation and/or ablation of material from interstellar gas clouds caused by the impact of the high-energy photons and fast-flowing cluster winds produces a highly turbulent layer on the surface of the clouds from which the emission arises.
description: 19 pages, 13 figures (4 colour). Accepted for publication in ApJ
Operating Temperature Development of Overcommitted Inverters
Creators: name: Muntwyler, U.
name: Bolliger, M.
name: Lanz, M.
name: Schott, T.
Publisher: name: WIP
Year: 2019
Subjects: Photovoltaic Modules and BoS Components
Inverters and Balance of System Components

description: 36th European Photovoltaic Solar Energy Conference and Exhibition; 1217-1219
description: PV plants in Central Europe reach about 1,000 full load hours. So, they produce 1'000kWh / kWp. If a high expansion of PV power is sought, often an additional network expansion is necessary to absorb short-term power peaks. The grid expansion costs contrast with the peak output, which takes only a few hours each year. At the Technology Center of BKW Energie AG, this led to the idea of expanding the DC power more strongly than the AC side (for example, by parallel string assignment) and thereby increasing the amount of electricity per installed grid capacity. As a result, more solar energy is produced in the marginal times, while the midday peaks are flatter. To expand the DC side more than the AC side, the inverters must adjust the power. In order to keep the costs low and to increase security, commercially available inverters should be used. They are, with some exceptions, not designed for a PV array that has much more power than the peak power of the inverter. To learn the behavior of the devices, several inverters were offered up to 200% of the specified DC power (increased DC current) and simultaneously recorded the inverters MPP tracking and development of the operating temperature. The result of the investigation is that all tested inverters coped with the power surplus. They regulated the DC current by shifting the MPP and thus the operating temperature did not increase any further. The only limitations are the warranty of the equipment manufacturer if the inverters are operated outside the specifications. In addition, the specified system voltage must not be exceeded, otherwise the device will be damaged.
Fragmentation in the massive G31.41+0.31 protocluster
Creators: name: Beltrán, M. T.
name: Rivilla, V. M.
name: Cesaroni, R.
name: Maud, L. T.
name: Galli, D.
name: Moscadelli, L.
name: Lorenzani, A.
name: Ahmadi, A.
name: Beuther, H.
name: Csengeri, T.
name: Etoka, S.
name: Goddi, C.
name: Klaassen, P. D.
name: Kuiper, R.
name: Kumar, M. S. N.
name: Peters, T.
name: Sánchez-Monge, Á.
name: Schilke, P.
name: van der Tak, F.
name: Vig, S.
name: Zinnecker, H.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Context. ALMA observations at 1.4 mm and 0.2'' (750au) angular resolution of the Main core in the high-mass star forming region G31.41+0.31 have revealed a puzzling scenario: on the one hand, the continuum emission looks very homogeneous and the core appears to undergo solid-body rotation, suggesting a monolithic core stabilized by the magnetic field; on the other hand, rotation and infall speed up toward the core center, where two massive embedded free-free continuum sources have been detected, pointing to an unstable core having undergone fragmentation. Aims. To establish whether the Main core is indeed monolithic or its homogeneous appearance is due to a combination of large dust opacity and low angular resolution, we carried out millimeter observations at higher angular resolution and different wavelengths. Methods. We carried out ALMA observations at 1.4 mm and 3.5 mm that achieved angular resolutions of 0.1''(375 au) and 0.075'' (280 au), respectively. VLA observations at 7 mm and 1.3 cm at even higher angular resolution, 0.05'' (190 au) and 0.07'' (260 au), respectively, were also carried out to better study the nature of the free-free continuum sources detected in the core. Results. The millimeter continuum emission of the Main core has been clearly resolved into at least four sources, A, B, C, and D, within 1'', indicating that the core is not monolithic. The deconvolved radii of the dust emission of the sources, estimated at 3.5 mm, are 400-500au, their masses range from 15 to 26 Msun, and their number densities are several 1E9 cm-3. Sources A and B, located closer to the center of the core and separated by 750 au, are clearly associated with two free-free continuum sources, likely thermal radio jets, and are the brightest in the core. The spectral energy distribution of these two sources and their masses and sizes are similar and suggest a common origin.
description: 18 pages,9 figures, 5 tables. Accepted by A&A
Additional file 4 of Performance of waist-to-height ratio as a screening tool for identifying cardiometabolic risk in children: a meta-analysis
Creators: name: Jiang, Yuan
name: Dou, Yalan
name: Chen, Hongyan
name: Zhang, Yi
name: Chen, Xiaotian
name: Wang, Yin
name: Rodrigues, Myanca
name: Yan, Weili
Publisher: name: figshare
Year: 2021
Subjects: Biochemistry
Medicine
Cell Biology
Pharmacology
Biotechnology
Biological Sciences not elsewhere classified
Science Policy

description: Additional file 4: Table S3. Other pooled results of WHtR screening for CMRs in children and adolescents.
A new general relativistic magnetohydrodynamics code for dynamical spacetimes
Creators: name: Cerdá-Durán, Pablo
name: Font, José A.
name: Antón, Luis
name: Müller, Ewald
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We present a new numerical code which solves the general relativistic magneto-hydrodynamics (GRMHD) equations coupled to the Einstein equations for the evolution of a dynamical spacetime within the conformally-flat approximation. This code has been developed with the main objective of studying astrophysical scenarios in which both, high magnetic fields and strong gravitational fields appear, such as the magneto-rotational collapse of stellar cores, the collapsar model of GRBs, and the evolution of neutron stars. The code is based on an existing and thoroughly tested purely hydrodynamics code and on its extension to accommodate weakly magnetized fluids (passive magnetic field approximation). The numerical code we present here is based on high-resolution shock-capturing schemes to solve the GRMHD equations together with the flux constraint transport method to ensure the solenoidal condition of the magnetic field. Since the astrophysical applications envisaged do not deviate much from spherical symmetry, the conformal flatness condition approximation is used for the formulation of the Einstein equations. In addition, the code can handle several equations of state, from simple analytical expressions to microphysical tabulated ones. In this paper we present stringent tests of our new GRMHD numerical code, which show its ability to handle all aspects appearing in the astrophysical scenarios for which the code is intended, namely relativistic shocks, highly magnetized fluids, and equilibrium configurations of magnetized neutron stars. As an application, magneto-rotational core collapse simulations of a realistic progenitor are presented, comparing the results with our previous finding in the passive magnetic field approximation.
description: 18 pages, 11 figures. Accepted for publication in Astronomy & Astrophysics
Surface Brightness Profiles for a sample of LMC, SMC and Fornax galaxy Globular Clusters
Creators: name: Noyola, Eva
name: Gebhardt, Karl
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We use Hubble Space Telescope archival images to measure central surface brightness profiles of globular clusters around satellite galaxies of the Milky Way. We report results for 21 clusters around the LMC, 5 around the SMC, and 4 around the Fornax dwarf galaxy. The profiles are obtained using a recently developed technique based on measuring integrated light, which is tested on an extensive simulated dataset. Our results show that for 70% of the sample, the central photometric points of our profiles are brighter than previous measurements using star counts with deviations as large as 2 mag/arcsec^2. About 40% of the objects have central profiles deviating from a flat central core, with central logarithmic slopes continuously distributed between -0.2 and -1.2. These results are compared with those found for a sample of Galactic clusters using the same method. We confirm the known correlation in which younger clusters tend to have smaller core radii, and we find that they also have brighter central surface brightness values. This seems to indicate that globular clusters might be born relatively concentrated, and that a profile with extended flat cores might not be the ideal choice for initial profiles in theoretical models.
description: 15 pages, 9 figures, AJ accepted
The honourable estate : marital advice in England during the sixteenth and seventeenth centuries
Creators: name: Parker, Shannon Kathleen
Publisher: name: University of British Columbia
Year: 2010

description: The purpose of this paper is to analyze advice about marriage written in England during the sixteenth and seventeenth centuries. The first chapter focuses on marital counsel contained in letters, the second on advice offered by Protestant clergymen, and the third on various kinds of popular literature which discussed marriage and women. The contents of the works are described, as is the historical and literary context in which they were written. Although the form, purpose, and significance of the marital counsel varies, the advice itself is remarkably consistent. The central concern of the authors is how a man can select a good wife and how the woman should comport herself after marriage; only the works written by clerics describe the husband's marital responsibilities to any significant extent. The implication is that a successful marriage would result if the man chose his wife wisely and if, once chosen, the woman conformed to his and society's expectations. However, advice tells us only what people were saying, not what they were doing; it is prescriptive, not descriptive. Moreover, when examining works which dealt with wedlock, one becomes aware of the essentially literary nature of much of the counsel—many authors simply repeated or expanded on clichés. Their words do not provide us with insight into their own thoughts or matrimonial relations, but inform us as to the accepted, conventional mode of discussing marriage during this period.
Presentation on "Developing an electronic sensor for detecting short-lived atmospheric radicals and other gases" for ASIC 2022
Creators: name: Holmes, Justin D.
name: Hellebust, Stig
Publisher: name: Zenodo
Year: 2022
Subjects: atmospheric radicals
environmental monitoring
air sensors
air quality monitoring
nanotechnology
nanofabrication
junctionless nanowire transistors
field effect transistors
nanosensors
gas sensors
self-assembled monolayers
radical reactions
surface functionalisation
ASIC

description: Abstract:

Atmospheric radicals, particularly hydroxyl and nitrate, are the drivers of chemical processes that determine atmospheric composition and thus influence local and global air quality and climate. However, the detection of these short-lived atmospheric radicals is far from routine, and only a few labs worldwide can accurately measure their concentrations in air. Current techniques for measuring radicals are based on spectroscopic and mass spectrometric methods, which although sensitive and robust, are technically complex, cumbersome and expensive.

This presentation provides an overview, and a discussion of the latest results, from the EU-funded project ‘RADICAL’ which is developing a small, low-cost sensor to electrically detect short-lived atmospheric radicals in real-time. This will be the first gas sensor built from an array of junctionless nanowire transistors, which has proven popular for liquid-based sensors. Although challenging, RADICAL sensors not only have the potential to be rolled out on a global scale but can also be adapted to detect other important atmospheric gases, particularly on short-timescales. The project team welcome ideas and future collaborations for how these sensors might be best applied in real-life environmental monitoring situations.

Additional Information:

Professor Justin Holmes (University College Cork) delivered this presentation for the Air Sensor International Conference 2022 (11-13 May 2022), which brings together stakeholders from academia, government, communities, and commercial interests to promote and advance air pollution sensors, improve the data quality from these sensors, expand the pollutants measured, and foster community involvement in monitoring air quality.

RADICAL represents a 'Fundamental Breakthrough in Detection of Atmospheric Free Radicals'.

Find out more on the RADICAL project website: radical-air.eu

The RADICAL project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement number 899282.
Interconnection of Silicon Heterojunction Solar Cells by Infrared Soldering - Solder Joint Analysis and Temperature Study
Creators: name: De Rose, A.
name: Geipel, T.
name: Eberlein, D.
name: Kraft, A.
name: Nowottnick, M.
Publisher: name: WIP
Year: 2019
Subjects: Silicon Materials and Cells
Heterojunction Solar Cells

description: 36th European Photovoltaic Solar Energy Conference and Exhibition; 229-234
description: Interconnection of silicon heterojunction (SHJ) solar cells by soldering is challenging due to the temperature sensitivity of the passivation layers. Within our study, we evaluate solder joints on SHJ solar cells interconnected by infrared (IR) soldering. We screen printed various low-temperature metallization pastes on industrial precursors and interconnected them with Sn60Pb40 coated Cu ribbons on an industrial IR stringer. For our analysis, we used a temperature profile for soldering according to the industrial standard of PERC cells (~240 °C, < 3 s). Adhesion after soldering was characterized by 90° peel tests, yielding improved values of 0.9 N/mm. Microstructural investigations reveal a defined Ag3Sn layer, indicating a proper metallurgical bond. With electrical characterizations at cell and module level, we show IR soldering to be feasible for the interconnection of SHJ solar cells. We built 3-cell-modules and measure a power degradation below 1.5 % after 200 temperature cycles (−40 °C/+85 °C). A successful interconnection is also shown by a cell-to-module power ratio of 98.8 % for a 60-cellmodule achieving 324 W.
Ab-initio calculation of the vibrational modes of SiH4, H2SiO, Si10H16, and Si10H14O
Creators: name: Gaal-Nagy, Katalin
name: Canevari, Giulia
name: Onida, Giovanni
Publisher: name: arXiv
Year: 2007
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We have studied the normal modes of hydrogenated and oxidized silicon nanocrystals, namely SiH4 (silan), H2SiO (silanon), Si10H16 and Si10H14O. The small clusters (SiH4 and H2SiO) have been used for convergence tests and their bondlengths and frequencies have been compared with experimental and theoretical reference data. For the large clusters (Si10H16 and Si10H14O) we have investigated the vibrational density of states where we have identified the oxygen-related spectral features. The vibrational modes have been also analyzed with respect to the displacement patterns. The calculations have been carried out within the density-functional and density-functional perturbation theory using the local-density approximation.
description: 9 pages, 7 figures
Predictive analytics using Social Big Data and machine learning
Creators: name: Abu-Salih, Bilal
name: Wongthongtham, Pornpit
name: Zhu, Dengya
name: Chan, Kit Yan
name: Rudra, Amit
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences

description: The ever-increase in the quality and quantity of data generated from day-to-day businesses operations in conjunction with the continuously imported related social data have made the traditional statistical approaches inadequate to tackle such data floods. This has dictated researchers to design and develop advance and sophisticated analytics that can be incorporated to gain valuable insights that benefit the business domain. This chapter sheds the light on core aspects that lay the foundations for social big data analytics. In particular, the significance of predictive analytics in the context of SBD is discussed fortified with presenting a framework for SBD predictive analytics. Then, various predictive analytical algorithms are introduced with their usage in several important application and top-tier tools and APIs. A case study on using predictive analytics to social data is provided supported with experiments to substantiate the significance and utility of predictive analytics.
QCD-Instantons and Conformal Space-Time Inversion Symmetry
Creators: name: Klammer, D.
name: Schrempp, F.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this paper, we explore the appealing possibility that the strong suppression of large-size QCD instantons - as evident from lattice data - is due to a surviving conformal space-time inversion symmetry. This symmetry is both suggested from the striking invariance of high-quality lattice data for the instanton size distribution under inversion of the instanton size rho --> ^2 / rho and from the known validity of space-time inversion symmetry in the classical instanton sector. We project the instanton calculus onto the four-dimensional surface of a five-dimensional sphere via conformal stereographic mapping, before investigating conformal inversion. This projection to a compact, curved geometry is both to avoid the occurence of divergences and to introduce the average instanton size from the lattice data as a new length scale. The average instanton size is identified with the radius b of this 5d-sphere and acts as the conformal inversion radius. For b = , our corresponding results are almost perfectly symmetric under space-time inversion and in good qualitative agreement with the lattice data. For rho / b --> 0, we recover the familiar results of instanton perturbation theory in flat 4d-space. Moreover, we illustrate that a (weakly broken) conformal inversion symmetry would have significant consequences for QCD beyond instantons. As a further successful test for inversion symmetry, we present striking implications for another instanton dominated lattice observable, the chirality-flip ratio in the QCD vacuum.
description: 24 pages, 8 figures
Improving Organic-Silicon Heterojunction Solar Cells through the Admixture of Sorbitol to PEDOT:PSS
Creators: name: Halbich, M.-U.
name: Sauer-Stieglitz, R.
name: Lövenich, W.
name: Schmidt, J.
Publisher: name: WIP
Year: 2019
Subjects: Silicon Materials and Cells
Heterojunction Solar Cells

description: 36th European Photovoltaic Solar Energy Conference and Exhibition; 214-218
description: We examine the impact of Sorbitol admixture on the hole conductive polymer PEDOT:PSS[poly(3,4ethylenedioxythiophene):poly(styrenesulfonate)] in combination with a variation of the annealing duration. As demonstrated in a previous publication, the admixture of Sorbitol to the PEDOT:PSS dispersion is improving the transparency of the organic layer and is also improving the surface passivation. On the other hand, the contact resistance on the silicon surface tends to increase by admixture of Sorbitol. In this study, we fabricate solar cells where the PEDOT:PSS layer is used as a hole-selective contact at the cell rear (so-called ‘BackPEDOT’ solar cells). The electron-selective front is conventionally processed by means of phosphorus diffusion. The passivation of the silicon surface with PEDOT:PSS:Sorbitol shows an improvement in the passivation quality and the solar cells show an increasing open-circuit voltage Voc by increasing the annealing duration from the previously routinely applied 10 min to 60 min. The short-circuit current density Jsc of the fabricated solar cells remains unchanged for all investigated annealing durations. Importantly, the series resistance Rs (and hence the contact resistance) of the fabricated BackPEDOT solar cells show a minimum for annealing durations between 45 and 90 min. As a consequence, increasing the annealing duration led to an increased maximum energy conversion efficiency of 20.6% at one sun.
Sorting Criteria for Bifacial PERC Cells for Improved Module Classification
Creators: name: Wöhrle, N.
name: Alapont Sabater, A.
name: Krieg, A.
name: Ramspeck, K.
name: Fellmeth, T.
name: Schmid, A.
name: Rein, S.
Publisher: name: WIP
Year: 2019
Subjects: Silicon Materials and Cells
Manufacturing & Production of Si Cells

description: 36th European Photovoltaic Solar Energy Conference and Exhibition; 447-450
description: With the increase of bifacial solar cells’ market share a major question for solar cell characterization is whether it is beneficial to determine the solar cells rear side efficiency together with the by default measured front side efficiency. In this work we investigate how a regularly and a heavily fluctuating rear side efficiency in production influence module power and the choice of sorting categories (“bin”). A sample batch of 1000 industrial bifacial solar cells with a regular production efficiency spread was produced and bifacially measured in an inline IV flasher. A module simulation was built, which creates virtual modules from IV curves of the cell batch with defined sorting criteria. Monofacial and bifacial sorting criteria were compared showing advantages for the bifacial criteria. To validate the simulation model and results eight bifacial 60-cell glass-glass modules were fabricated. Subsequently the given cell pool was virtually extended to production scale (100.000 cells) to evaluate the approach’s sortingbenefits for a quasi-infinite cell pool. The study’s result is that the inclusion of the bifacial efficiency into the sorting criteria makes it possible to diversify a monofacially determined module class into several clearly distinguished bifacial module classes while the average module power of the whole pool remains constant. Moreover the power spread of each module class gets significantly sharpened, which can reduce downgrading in sales The robustness of the module power towards changing illumination conditions increases and the effects of certain choice of sorting bins and illumination conditions on module classes are directly made visible through the developed simulation.
Raman spectral features of a natural chromitite from NW Türkiye: Characterization of magnesiochromite spectra and implications
Creators: name: Akbulut, Mehmet
Publisher: name: Periodico di Mineralogia
Year: 2025

description: In this work, a first detailed Raman spectroscopic measurement study of natural magnesiochromites from a multi-textural ophiolitic chromitite sample from Harmancık district in north-western Türkiye has been presented to characterize the Raman spectral features of Turkish high-Cr ophiolitic chromitites. The magnesiochromites in the multi-textural chromitite sample has an almost uniform composition, with Cr2O3, Al2O3, and TiO2 contents being 62.02 wt%, 9.18 wt%, and 0.14 wt% in average, respectively. Cr#s are 0.82 and Mg#s are 0.65 in average, in the ranges that of typical ophiolitic chromitites of boninitic to arc-related affinity. Despite this uniform composition, three distinctive Raman spectra morphologies (Types I, II and III) are determined. Of these, the Type I spectra is by far the dominant. Three common main band clusters are defined (BG- 1, BG-II and BG-III) for all of the morphological types. The BG-I (~385-605 cm-1) and BG-II (~649-739 cm-1) are the main clusters that incorporate the high intensity and descriptive peaks and shoulders. The BG-III includes the very low intensity broad bands around 1122 to 1763 cm-1, considered as overtones of the BG-I, and BG-II. Four of the several bands in the BG-I and BG-II has been assigned to the A1g (~690 cm-1), F2g(3) (~605 cm-1), F2g(2) (~555 cm-1), and Eg (~470 cm-1) modes of spinel. Of the several un-assigned bands, the ~730 cm-1 band has been interpreted to be related with the high-Cr nature of the studied sample. The variance in this band’s intensity has been interpreted to be related with concomitant or post-crystallization textural arrangement and the plastic mantle deformation. This result emphasize the viability of a preliminary approach on orientation of the magnesiochromites in the ophiolitic chromitites via Raman spectroscopy, if the composition variable can be constrained.
description: Periodico di Mineralogia, Vol. 94 No. 1 (2025)
Cosmological Simulations of the Preheating Scenario for Galaxy Cluster Formation: Comparison to Analytic Models and Observations
Creators: name: Younger, Joshua D.
name: Bryan, Greg L.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We perform a set of non--radiative cosmological simulations of a preheated intracluster medium in which the entropy of the gas was uniformly boosted at high redshift. The results of these simulations are used first to test the current analytic techniques of preheating via entropy input in the smooth accretion limit. When the unmodified profile is taken directly from simulations, we find that this model is in excellent agreement with the results of our simulations. This suggests that preheated efficiently smoothes the accreted gas, and therefore a shift in the unmodified profile is a good approximation even with a realistic accretion history. When we examine the simulation results in detail, we do not find strong evidence for entropy amplification, at least for the high-redshift preheating model adopted here. In the second section of the paper, we compare the results of the preheating simulations to recent observations. We show -- in agreement with previous work -- that for a reasonable amount of preheating, a satisfactory match can be found to the mass-temperature and luminosity-temperature relations. However -- as noted by previous authors -- we find that the entropy profiles of the simulated groups are much too flat compared to observations. In particular, while rich clusters converge on the adiabatic self--similar scaling at large radius, no single value of the entropy input during preheating can simultaneously reproduce both the core and outer entropy levels. As a result, we confirm that the simple preheating scenario for galaxy cluster formation, in which entropy is injected universally at high redshift, is inconsistent with observations.
description: 11 pages, 13 figures, accepted for publication in ApJ
Sémiologie et La chanson de Roland
Creators: name: Steele, Stephen
Publisher: name: University of British Columbia
Year: 2010

description: The Song of Roland's place in contemporary theoretical discussion is marked by ambiguity. On the one hand, the text is cited on nearly every question of importance to medieval philology and literary studies, a practice which certainly evinces general consensus regarding the importance of the work. On the other hand, these citations often take the form of appeals to an oracular authority; that is, rather than encourage theoretical reflection, they replace it. Paradoxically, it is precisely the Song of Roland's omnipresence in critical discourse today that occludes a serious critical engagement with the text. Everyone «knows» about the Song of Roland; the text is dissolved in philological discourse. Perhaps only a second reading can save it. The situation commands modesty on the part of a critic who would take up the Song of Roland, and it is a modest task I have set for myself here. I will analyze the text from a fresh perspective: semiotics. The language and the story of the Song of Roland are largely constituted by signs. For example, the text's characters frequently encounter «signs» of their destiny. They are, however, bound by Christian notions of fate to accept those signs, even when they augur death. Charlemagne, with (semiotic) foreknowledge of Roland's death is powerless to alter the course of events. He can interpret signs. But, he is unable to act on their messages. That is the semiotic bind of the medieval Christian world. Signs have another level of meaning in the Song of Roland. They have mnemonic significance. Since the Song of Roland is an oral text (and, here, I will make use of philological evidence), signs are an «aide-mémoire» that enable the text's reader to recall the narrative. I will argue, then, that the text's semiosis is a formulaic strategy: in other words, the same signs occur throughout the text -- a sort of set semiotic pattern generating the narrative. I will also use semiotics to classify the types of discourse (political, poetic, religious, etc.) which characterize the work. For instance, I will show that the Church and the King authorize the text in a bid to enlist crusaders. I will offer no final decisions on the issues of the Song of Roland debate such as the question of origins, nor any contributions to philological concerns about sources and etymologies. I will simply try to adhere as closely as possible to the meaning(s) of this single text and, through semiotics, to re-new critical interest in the Song of Roland.
LED-Based Differential Spectral Responsivity Measurements of PV Modules
Creators: name: Sträter, H.
name: Riechelmann, S.
name: Neuberger, F.
name: Winter, S.
Publisher: name: WIP
Year: 2019
Subjects: Photovoltaic Modules and BoS Components
PV Module Design, Manufacture, Performance and Reliability

description: 36th European Photovoltaic Solar Energy Conference and Exhibition; 1121-1126
description: Spectral responsivity (SR) measurements are a powerful technique to measure the opto-electronic properties of photovoltaic devices like solar cells or PV modules. Although the SR determination of solar cells is a common and established technique for many years, much more effort must be taken to determine the SR of PV modules due to their size. Significantly larger and more complex solar simulator must be used, which led to a variety of different measurement techniques, each with its own disadvantages. In this work we present SR and linearity measurements performed with an LED-based solar simulator, which is capable of measuring the SR of a whole PV module within a reasonable amount of time. The principal solar simulator characteristics with its advantages and challenges are presented, including the properties of the emitted spectrum and the homogeneity of the resulting light field. The evaluation of our method, which is performed at conditions close to standard test conditions (STC) and bears characteristics of a differential spectral responsivity (DSR), is presented and demonstrated on different silicon-based and thin film PV modules, respectively. With the ability to tune the spectral irradiance gradually while maintaining an AM1.5g-like spectrum, linearity measurements of the short-circuit current of PV modules have been performed and are presented as well.
Observation of $ψ(4415)\to D \bar D{}^{*}_2(2460)$ decay using initial-state radiation
Creators: name: Belle Collaboration
name: Pakhlova, G.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We report the first observation of the $ψ(4415)$ resonance in the reaction $\e^+e^-\to D^0 D^-π^+$ and a measurement of its cross section in the center-of-mass energy range $4.0\mathrm{GeV}$ to $5.0\mathrm{GeV}$ with initial state radiation. From a study of resonant structure in $ψ(4415)$ decay we conclude that the $ψ(4415)\to D^0 D^-π^+$ decay is dominated by $ψ(4415)\to D \bar D{}^{*}_2(2460)$. We obtain $\mathcal{B}(ψ(4415)\to D^0 D^-π^+_{\mathrm {non-resonant}})/\mathcal{B}(ψ(4415)\to D \bar D{}^{*}_2(2460)\to D^0 D^-π^+)<0.22$ at 90% C.L. The analysis is based on a data sample collected with the Belle detector with an integrated luminosity of 673 $\mathrm{fb}^{-1}$.
description: Presented on EPS07, LP07, QWG07conferences
Multiplicity of Galactic Luminous Blue Variable stars
Creators: name: Mahy, L.
name: Lanthermann, C.
name: Hutsemékers, D.
name: Kluska, J.
name: Lobel, A.
name: Manick, R.
name: Miszalski, B.
name: Reggiani, M.
name: Sana, H.
name: Gosset, E.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Context. Luminous Blue Variables (LBVs) are thought to be in a transitory phase between O stars on the main-sequence and the Wolf-Rayet stage. Recent studies suggest that they might be formed through binary interaction. Only a few are known in binary systems but their multiplicity fraction is uncertain. Aims. This study aims at deriving the binary fraction among the Galactic (confirmed and candidate) LBV population. We combine multi-epoch spectroscopy and long-baseline interferometry. Methods. We use cross-correlation to measure their radial velocities. We identify spectroscopic binaries through significant RV variability (larger than 35 km/s). We investigate the observational biases to establish the intrinsic binary fraction. We use CANDID to detect interferometric companions, derive their parameters and positions. Results. We derive an observed spectroscopic binary fraction of 26 %. Considering period and mass ratio ranges from Porb=1 to 1000 days, and q = 0.1-1.0, and a representative set of orbital parameter distributions, we find a bias-corrected binary fraction of 62%. From interferometry, we detect 14 companions out of 18 objects, providing a binary fraction of 78% at projected separations between 1 and 120 mas. From the derived primary diameters, and the distances of these objects, we measure for the first time the exact radii of Galactic LBVs to be between 100 and 650 Rsun, making unlikely to have short-period systems. Conclusions. This analysis shows that the binary fraction among the Galactic LBV population is large. If they form through single-star evolution, their orbit must be initially large. If they form through binary channel that implies that either massive stars in short binary systems must undergo a phase of fully non-conservative mass transfer to be able to sufficiently widen the orbit or that LBVs form through merging in initially binary or triple systems.
description: 14 pages, 9 figures, 4 tables; Accepted for publication in A&A. (Abstract shortened to respect the arXiv limit of 1920 characters)
Do social factors explain seasonal variation in dawn song characteristics of paired male Cerulean Warblers (Setophaga cerulea)?
Creators: name: MacDonald, Garrett J.
name: Islam, Kamal
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: Science Policy

description: Territorial male birds of many north temperate species sing prolifically before sunrise in a behaviour known as ‘dawn song,’ after which males sing at lower rates, use different song types, or cease singing altogether. From May to July 2017 in southern Indiana, we recorded 100 dawn song performances from 12 paired male Cerulean Warblers (Setophaga cerulea) and we quantified the relative influences of social (breeding stage of the focal pair) and abiotic factors (Julian date and weather) on six characteristics of dawn song. We found that dawn song was influenced by both biotic and abiotic factors, but weather had the most model support. Males were more likely to sing dawn song early in the season, and most males nesting late in the season ceased dawn song altogether. Dawn song start times (in relation to sunrise) varied little over the season, but males ended dawn song earlier, and sang at lower peak rates, as the season progressed. Additionally, males initiated and ended dawn song later on windy and rainy mornings. Multiple factors apparently influence dawn singing behaviour in paired male Cerulean Warblers, yet weather may have a greater effect on dawn song than do Julian date or social behaviour.
Phantom Higgs from Unparticles
Creators: name: Delgado, A.
name: Espinosa, J. R.
name: No, J. M.
name: Quiros, M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A renormalizable coupling between the Higgs and a scalar unparticle operator O_U of non-integer dimension d_U < 2 gives rise, after electroweak symmetry breaking, to a mass gap in the unparticle continuum and a shift in the original Higgs mass, which can end up above or below the mass gap. We show that, besides the displaced Higgs state, a new isolated state can generically appear in the spectrum near or below the mass gap. Such state (which we call phantom Higgs) is a mixture of Higgs and unparticles and therefore has universally reduced couplings to fermions and gauge bosons. This phenomenon could cause the mass of the lightest Higgs state accessible to colliders to be much smaller than the mass expected from the SM Lagrangian.
description: 14 LaTeX pages, 6 figures