cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Computing optical meteor flux using Global Meteor Network data
Creators: name: Vida, Denis
name: Erskine, Rhiannon C. Blaauw
name: Brown, Peter G.
name: Kambulow, Jonathon
name: Campbell-Brown, Margaret
name: Mazur, Michael J.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Meteor showers and their outbursts are the dominant source of meteoroid impact risk to spacecraft on short time scales. Meteor shower prediction models depend on historical observations to produce accurate forecasts. However, the current lack of quality and persistent world-wide monitoring at optical meteoroid sizes has left some recent major outbursts poorly observed. A novel method of computing meteor shower flux is developed and applied to Global Meteor Network data. The method is verified against previously published observations of the Perseids and the Geminids. The complete mathematical and algorithmic details of computing meteor shower fluxes from video observations are described. As an example application of our approach, the flux measurements of the 2021 Perseid outburst, the 2020-2022 Quadrantids, and 2020-2021 Geminids are presented. The flux of the 2021 Perseids reached similar levels to the 1991-1994 and 2016 outbursts (ZHR $\sim$ 280). The flux of the Quadrantids shows high year-to-year variability in the core of the stream while the longer lasting background activity is less variable, consistent with an age difference between the two components. The Geminids show a double peak in flux near the time of peak.
description: Accepted for publication in MNRAS, 18 pages, 15 figures
Sonnenfleckenzeichnung, unnummeriert.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 11.04.1931, erstellt von Friedrich Buser in der privaten Beobachtungsstation im Prätschli in Arosa
Creators: name: Buser, Friedrich
Publisher: name: [s.n.]
Year: 1931

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der privaten Beobachtungsstation Prätschli in Arosa. Instrument: 11-cm-Refraktor von Steinheil.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen
description: ETH-Bibliothek
SCALABLE MANUFACTURING OF LOW-DIMENSIONAL TELLURIUM AND TELLURIDE NANOSTRUCTURE FOR SMART, UBIQUITOUS ELECTRONICS
Creators: name: Wang, Yixiu
Publisher: name: Purdue University Graduate School
Year: 2022
Subjects: Manufacturing engineering not elsewhere classified

description: Low-dimensional semiconductors have been intensely explored as alternative active materials for future generation ultra-scaled smart electronics. However, significant roadblocks (e.g., poor carrier mobilities, instability, and vague potential in scaling-up) exist that prevent the realization of the current state-of-the-art low-dimensional materials’ potential for energy-efficient electronics. We first time developed hydrothermal method to solution-grown two-dimensional Te, which exhibits attractive attributes, e.g., high room-temperature mobility, large on-state current density, air-stability, and tunable material properties through a low-cost, scalable process, to tackle these challenges.
Sonnenfleckenzeichnung, unnummeriert.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 13.02.1931, erstellt von Friedrich Buser in der privaten Beobachtungsstation im Prätschli in Arosa
Creators: name: Buser, Friedrich
Publisher: name: [s.n.]
Year: 1931

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der privaten Beobachtungsstation Prätschli in Arosa. Instrument: 11-cm-Refraktor von Steinheil.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen
description: ETH-Bibliothek
Sediment retention in rectangular storage tanks: Computations with a mass transport model and comparison with laboratory experiments.
Creators: name: Jensen, M.
Publisher: name: DTU Library, Technical University of Denmark (DTU)
Year: 2005
Subjects: subject: Combined sewer overflow
subject: deposition
subject: recipient influence
subject: settling tank
subject: urban drainage

description: ABSTRACT A linear convection-dispersion-deposition model, in 1 length dimension (CDD1), for a rectangular storage tank, is applied for computing the variation, over distance and time, of the vertical mean concentration C of suspended sediment. It is assumed, that the deposition rate to the bottom is proportional to C. The deposition velocity Vp, is the constant of proportionality. The model is used, for steady tank flow velocity V, to calculate the mass distribution (suspended mass + bottom mass + overflow mass) as function of time and tank length, for a continuous constant mass inlet. Focus is given to the retention efficiency defined as (suspended mass + bottom mass)/(mass inlet). The model is also used for comparison with a large set of laboratory experiments from one reference. The purpose of this comparison, is to study the variation of Vp with the sediment settling velocity Vs, and with flow parameters (Froude number etc.). The comparison shows that Vp/V does depend solely of the relative deposition (bottom mass)/(bottom mass+overflow mass), for which the reference presents an empirical formula with 3 hydraulic parameters namely: Tank Froude number, densimetric sediment Froude number and relative settling velocity Vs/V.
Sonnenfleckenzeichnung, unnummeriert.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 06.02.1931, erstellt von Friedrich Buser in der privaten Beobachtungsstation im Prätschli in Arosa
Creators: name: Buser, Friedrich
Publisher: name: [s.n.]
Year: 1931

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der privaten Beobachtungsstation Prätschli in Arosa. Instrument: 11-cm-Refraktor von Steinheil.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen
description: ETH-Bibliothek
Quantifying the Efficiency of Project-Based Learning Experiences
Creators: name: Hugo, Ron
name: Brennan, Bob
name: Gu, Peihua
name: Lu, X
Publisher: name: 7th International CONCEIVE DESIGN IMPLEMENT OPERATE Conference
Year: 2011

description: The use of active learning, and specifically Project-Based Learning (PjBL) for
this paper, has been shown to be an effective means of increasing the
development of attributes that would otherwise be difficult to enhance in a
traditional engineering curriculum.  Teamwork, interpersonal communication,
engineering economics, and dispute resolution are all examples of attributes
that can be developed and strengthened through the PjBL experience.  The
utility of these dual-impact learning experiences is that they help strengthen
not only the hard-to-reach attributes but also the technical understanding of
the subject area that the PjBL experience relates to.  Although there are many
positive aspects surrounding the PjBL experience, the fact remains that they
can be expensive to implement given the requirements for non-traditional
hardware and infrastructure and also the additional expenses for the materials
and supplies required for each project.  Engineering educators and
administrators need to have a method of assessing how to balance the value of
enhanced learning outcomes with the additional financial investment.  It is
with this in mind that this paper takes steps towards quantifying the
efficiency of the PjBL experience.
Sonnenfleckenzeichnung, unnummeriert.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 06.01.1931, erstellt von Friedrich Buser in der privaten Beobachtungsstation im Prätschli in Arosa
Creators: name: Buser, Friedrich
Publisher: name: [s.n.]
Year: 1931

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der privaten Beobachtungsstation Prätschli in Arosa. Instrument: 11-cm-Refraktor von Steinheil.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen
description: ETH-Bibliothek
Systematically smaller single-epoch quasar black hole masses using a radius-luminosity relationship corrected for spectral bias
Creators: name: Maithil, Jaya
name: Brotherton, Michael S.
name: Shemmer, Ohad
name: Du, Pu
name: Wang, Jian-Min
name: Myers, Adam D.
name: McLane, Jacob N.
name: Dix, Cooper
name: Matthews, Brandon M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Determining black hole masses and accretion rates with better accuracy and precision is crucial for understanding quasars as a population. These are fundamental physical properties that underpin models of active galactic nuclei. A primary technique to measure the black hole mass employs the reverberation mapping of low-redshift quasars, which is then extended via the radius-luminosity relationship for the broad-line region to estimate masses based on single-epoch spectra. An updated radius-luminosity relationship incorporates the flux ratio of optical Fe ii to H$β$ ($\equiv \mathcal{R}_{\rm Fe}$) to correct for a bias in which more highly accreting systems have smaller line-emitting regions than previously realized. In this current work, we demonstrate and quantify the effect of using this Fe-corrected radius-luminosity relationship on mass estimation by employing archival data sets possessing rest-frame optical spectra over a wide range of redshifts. We find that failure to use a Fe-corrected radius predictor results in overestimated single-epoch black hole masses for the most highly accreting quasars. Their accretion rate measures ($L_{\rm Bol}/ L_{\rm Edd}$ and $\dot{\mathscr{M}}$), are similarly underestimated. The strongest Fe-emitting quasars belong to two classes: high-z quasars with rest-frame optical spectra, which given their extremely high luminosities, require high accretion rates, and their low-z analogs, which given their low black holes masses, must have high accretion rates to meet survey flux limits. These classes have mass corrections downward of about a factor of two, on average. These results strengthen the association of the dominant Eigenvector 1 parameter $\mathcal{R}_{\rm Fe}$ with the accretion process.
description: Accepted by MNRAS, 16 pages. All figures are included in the source zip file (Download --> Other formats --> Source)
Binucleating Ligands: Design and Reactivity
Creators: name: Behlen, Michael
Publisher: name: Purdue University Graduate School
Year: 2022
Subjects: Inorganic chemistry not elsewhere classified
Organic chemistry not elsewhere classified
Theoretical quantum chemistry
Organometallic chemistry
Computational chemistry
Catalysis and mechanisms of reactions

description: Pincer ligands are a cornerstone of modern transition metal catalysis. An increasing interest in bimetallic catalysis motivated us to develop binucleating variants of these mononucleating ligands. Expanded variants of the PDI and PyBOX ligands were targeted, leading to the development of the Naphthyridine Diimine (“NDI”) and Naphthyridine Bisoxazoline (“NapBOX”) ligands, respectively. Metalation of NDI with appropriate metal precursors yielded Fe2, Co2 and Ni2 complexes which exhibited unique stoichiometric and catalytic reactivity. Metalation of the NapBOX ligand with nickel carboxylate salts yielded Ni2 complexes which were capable of catalyzing an asymmetric intermolecular [4+1] cycloaddition reaction between 1,1-dichloroalkene-derived vinylidenes and 1,3-dienes. Each of these processes were studied experimentally and computationally in order to understand the fundamental reactivity of organic substrates across metal-metal bonds.
Gap opening by planets in discs with magnetised winds
Creators: name: Elbakyan, Vardan
name: Wu, Yinhao
name: Nayakshin, Sergei
name: Rosotti, Giovanni
Publisher: name: arXiv
Year: 2022
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Planets open deep gaps in protoplanetary discs when their mass exceeds a gap opening mass, $M_{\rm gap}$. We use one- and two-dimensional simulations to study planet gap opening in discs with angular momentum transport powered by MHD disc winds. We parameterise the efficiency of the MHD disc wind angular momentum transport through a dimensionless parameter $α_{\rm dw}$, which is an analogue to the turbulent viscosity $α_{\rm v}$. We find that magnetised winds are much less efficient in counteracting planet tidal torques than turbulence is. For discs with astrophysically realistic values of $α_{\rm dw}$, $M_{\rm gap}$ is always determined by the residual disc turbulence, and is a factor of a few to ten smaller than usually obtained for viscous discs. We introduce a gap opening criterion applicable for any values of $α_{\rm v}$ and $α_{\rm dw}$ that may be useful for planet formation population synthesis. We show that in discs powered by magnetised winds, growing planets detach from the disc at planet masses below $\sim 0.1M_{\rm Jup}$ inside 10 AU. This promotes formation of super-Earth planets rather than gas giants in this region, in particular precluding formation of hot jupiters in situ. On larger scales, ALMA gap opening planet candidates may be less massive than currently believed. Future high-resolution observations with instruments such as the extended ALMA, ngVLA, and SKA are likely to show abundant narrow annular features at $R < 10$ AU due to ubiquitous super-Earth planets.
description: 14 pages, 9 figures, accepted to MNRAS
Improved binary solution for the gamma-ray binary 1FGL J1018.6-5856
Creators: name: van Soelen, B.
name: Keague, S. Mc
name: Malyshev, D.
name: Chernyakova, M.
name: Komin, N.
name: Matchett, N.
name: Monageng, I. M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The gamma-ray binary 1FGL J1018.6-5856 consists of an O6V((f)) type star and an unknown compact object, and shows orbitally modulated emission from radio to very high energy gamma rays. The X-ray light curve shows a maximum around the same phase as the GeV emission, but also a secondary maximum between phases $ϕ=0.2 - 0.6$. A clear solution to the binary system is important for understanding the emission mechanisms occurring within the system. In order to improve on the existing binary solution, we undertook radial velocity measurements of the optical companion using the Southern African Large Telescope, as well as analysed publicly available X-ray and GeV gamma-ray data. A search for periodicity in Fermi-LAT data found an orbital period of $P=16.5507\pm0.0004$ d. The best fit solution to the radial velocities, held at this new period, finds the system to be more eccentric than previous observations, $e=0.531 \pm 0.033$ with a longitude of periastron of $151.2 \pm 5.1^\circ$, and a larger mass function $f = 0.00432\pm 0.00077$ M$_\odot$. We propose that the peaks in the X-ray and gamma-ray light curves around phase 0 are due to the observation of the confined shock formed between the pulsar and stellar wind pointing towards the observer. The secondary increase or strong rapid variations of the X-ray flux at phases 0.25-0.75 is due to the interaction of multiple randomly oriented stellar wind clumps/pulsar wind interactions around apastron.
description: Accepted for publication in MNRAS; 8 pages, 11 figures
Sonnenfleckenzeichnung, unnummeriert.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 20.03.1931, erstellt von Friedrich Buser in der privaten Beobachtungsstation im Prätschli in Arosa
Creators: name: Buser, Friedrich
Publisher: name: [s.n.]
Year: 1931

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der privaten Beobachtungsstation Prätschli in Arosa. Instrument: 11-cm-Refraktor von Steinheil.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen
description: ETH-Bibliothek
Mass segregation and dynamics of primordial binaries in star clusters with a radially anisotropic velocity distribution
Creators: name: Pavlík, Václav
name: Vesperini, Enrico
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: This paper is the third in a series investigating, by means of $N$-body simulations, the implications of an initial radially anisotropic velocity distribution on the dynamics of star clusters. Such a velocity distribution may be imprinted during a cluster's early evolutionary stages and several observational studies have found examples of old globular clusters in which radial anisotropy is still present in the current velocity distribution. Here we focus on its influence on mass segregation and the dynamics of primordial binary stars (disruptions, ejections, and component exchanges). The larger fraction of stars on radial/highly eccentric orbits in the outer regions of anisotropic clusters lead to an enhancement in the dynamical interactions between inner and outer stars that affects both the process of mass segregation and the evolution of primordial binaries. The results of our simulations show that the time scale of mass segregation of the initially anisotropic cluster is longer in the core and shorter in the outer regions, when compared to the initially isotropic system. The evolution of primordial binaries is also significantly affected by the initial velocity distribution and we find that the rate of disruptions, ejections and exchange events affecting the primordial binaries in the anisotropic clusters is higher than in the isotropic ones.
description: 9 pages, 13 figures, accepted for publication in MNRAS
Sonnenfleckenzeichnung, unnummeriert.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 11.07.1931, erstellt von Friedrich Buser in der privaten Beobachtungsstation im Prätschli in Arosa
Creators: name: Buser, Friedrich
Publisher: name: [s.n.]
Year: 1931

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der privaten Beobachtungsstation Prätschli in Arosa. Instrument: 11-cm-Refraktor von Steinheil.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen
description: ETH-Bibliothek
Perspective from the Comet: Modeling water and gas species under variable gravity
Creators: name: Stothoff, Stuart
name: Stothoff, Stuart
Publisher: name: XVI International Conference on Computational Methods in Water Resources
Year: 2006

description: NASA is developing life-support technology for manned missions, using plants to
provide supplemental food and improve air quality. It is a challenge to design a
medium that allows oxygen and carbon dioxide to exchange between plant roots and
cabin atmosphere, while simultaneously supplying roots with water, without
significant gravitational body forces to move water around. As a precursor to medium
design, a simulator was developed with the intention of characterizing plant uptake,
water redistribution, and gas-species movement under microgravity. The numerical
formulation uses liquid pressure and dissolved-gas mass fractions as state variables,
calculating gas pressure assuming equilibrium between dissolved and gaseous states.
Part of the simulator-testing program included comparison with observations from
columns subjected to sequences of parabolas flown by a KC-135 ``Vomit Comet'', in
which acceleration repeatedly changed between 0 and 1.8 G within seconds. The
parabolic flight path requires specific tensiometer orientation relative to the
aircraft axes to minimize post-flight correction of data. The simulator considers
liquid- and gas-phase flow, diffusion of gas species in both the bulk gas phase and
as a dissolved species in the liquid, and thermal redistribution. Alternation between
0 and 1.8 g redistributes water from a more-or-less uniform distribution throughout
the medium to having a sharp water table in seconds, which is challenging numerically
for the coarse media being characterized. The initial formulation was unable to
negotiate the sequence of water redistributions in a mass-conservative simulation. A
robust, mass-conservative approach fully honoring the retention relationship was
developed by linearly approximating the derivative near the discontinuity in
capacitance as the gas phase disappears, which was found to be extremely effective in
minimizing iterations and thus allowing large time steps. This approach should be
useful in other situations with sharp discontinuities in capacitance, such as
freezing soils. The particular choice of state variables requires tight convergence
criteria to maintain mass balance during redistribution events. In the formulation,
capillary pressure is calculated as the difference between gas and liquid pressures,
which are almost identical near saturation hence are subject to roundoff error. It is
hypothesized that using partial capillary pressure for the dissolved-gas state
variables may provide a more robust formulation.
Daemicke et al_Advances_Supplemental Materials
Creators: name: Daemicke, Alexandra
name: Galt, Nicholas
name: Samonds, Karen
name: Bergan-Roller, Heather
Publisher: name: figshare
Year: 2022
Subjects: subject: Physiology
subject: FOS: Biological sciences
subject: 130103 Higher Education
subject: FOS: Educational sciences

description: The files are supplements to the manuscript, "Challenging Endocrinology Students with a Critical Thinking Workbook" including (a) the revised workbook ("Supplemental Materials 1_Endo Workbook Ed. 2") and (b) a description of the survey used to assess the workbook ("Supplemental Materials Table S1").
Daemicke et al_Advances_Supplemental Materials
Creators: name: Daemicke, Alexandra
name: Galt, Nicholas
name: Samonds, Karen
name: Bergan-Roller, Heather
Publisher: name: figshare
Year: 2019
Subjects: subject: Physiology
subject: FOS: Biological sciences
subject: 130103 Higher Education
subject: FOS: Educational sciences

description: The files are supplements to the manuscript, "Challenging Endocrinology Students with a Critical Thinking Workbook" including (a) the revised workbook ("Supplemental Materials 1_Endo Workbook Ed. 2") and (b) a description of the survey used to assess the workbook ("Supplemental Materials Table S1").
Nonthermal emission from the plunging region: a model for the high-energy tail of black hole X-ray binary soft states
Creators: name: Hankla, Amelia
name: Scepi, Nicolas
name: Dexter, Jason
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: X-ray binaries exhibit a soft spectral state comprising thermal blackbody emission at 1 keV and a power-law tail above 10 keV. Empirical models fit the high-energy power-law tail to radiation from a nonthermal electron distribution, but the physical location of the nonthermal electrons and the reason for their power-law index and high-energy cut-off are still largely unknown. Here, we propose that the nonthermal electrons originate from within the black hole's innermost stable circular orbit (the ''plunging region''). Using an analytic model for the plunging region dynamics and electron distribution function properties from particle-in-cell simulations, we outline a steady-state model that can reproduce the observed spectral features. In particular, our model reproduces photon indices of $Γ\gtrsim2$ and power-law luminosities on the order of a few percent of the disk luminosity for strong magnetic fields, consistent with observations of the soft state. Because the emission originates so close to the black hole, we predict that the power-law luminosity should strongly depend on the system inclination angle and black hole spin. This model could be extended to the power-law tails observed above 400 keV in the hard state of X-ray binaries.
description: 10 pages, 8 figures. Accepted in MNRAS
Everglades landscape evolution: islands, ridges, and channels
Creators: name: Stothoff, Stuart
name: Stothoff, Stuart
Publisher: name: XVI International Conference on Computational Methods in Water Resources
Year: 2006

description: The Florida Everglades is a vast wetland mosaic of sloughs, ridges, and tree
islands, with extremely small hydraulic gradients and low relief. Elongated
ridges of peat separated by sloughs in the regional flow direction form a
strikingly rhythmic landscape pattern. Many parts of the Everglades have seen
extensive peat loss and ecological change due to drainage and other hydraulic
controls over the last century. A suite of numerical models has been developed
to examine interactions between surface-water and groundwater flow,
vegetation, peat dynamics, nutrient transport, and anthropogenic hydraulic
controls. These models are supported by a set of field experiments and
observations, and explanations for the landscape patterns have begun to arise
from this interaction. Organic peat soil oxidizes rapidly when dry, whereas peat
formation is a slow process controlled by water levels, vegetative turnover, and
possibly scour and organic soil transport. Formation and maintenance of raised peat
levels in the face of oxidation, separated by lower sloughs, is partially explained
by net phosphorus transfer from slough to ridge during dry-season
evapotranspiration-driven subsurface lateral flow, which helps concentrate the
limiting nutrient (phosphorus) in higher ground, thus enhancing plant growth and
fueling more evapotranspiration. Plume-like tree islands on and downstream of local
bedrock rises may have phosphorus export due to phosphorus mining and selective
deposition of guano in addition to experiencing the evapotranspiration-driven
phosphorus enrichment process. Although historic records are scanty, there is
anecdotal evidence of sharp transitions between peat ridges and exposed limestone
channel bottoms. Exposed-bedrock channels between peat beds may be the result of
water levels gradually rising as peat forms, leaving sufficient water depth in
low-lying areas to scour clean the deeper channels without affecting the shallower
peat. Numerical simulations demonstrate the plausibility of the postulated ridge and
channel formation processes.
SCALABLE MANUFACTURING OF PRINTED APTASENSORS: DETECTION OF FOODBORNE PATHOGENS AND ENVIRONMENTAL CONTAMINANTS
Creators: name: Diaz, Lixby Susana
Publisher: name: Purdue University Graduate School
Year: 2022
Subjects: Medical biotechnology diagnostics (incl. biosensors)
Industrial biotechnology diagnostics (incl. biosensors)
Agricultural biotechnology diagnostics (incl. biosensors)

description: The development of low-cost, and reliable platforms for on-site detection of pathogenic agents, and toxic environmental traces is still a critical need for real-time monitoring of potential environmental pollution and imminent outbreaks. The biosensors market is projected to attain 31.5 billion by 2024. In this landscape, colorimetric and electrochemical devices continue to have significant relevance, with paper-based platforms leading the point-of-care (POC) segment for pathogen detection and environmental monitoring. Despite the true potential of biosensors in general, they have witnessed a slow rate in commercialization, mainly due to cost restrictions, and concerns related to their reliability and repeatability once scaled-up. This research evaluates the implementation of printing techniques as a strong approach for the fabrication of paper-based and flexible electrochemical biosensors. The results obtained demonstrated the ability to control and predict the variables affecting the sensing performance, achieving high precision of the printing parameters, and allowing optimization, and iterations since very early stages of prototype development. Besides the novel fabrication approach, this work introduces the use of truncated aptameric DNA sequences for whole cell detection of E. coli O157:H7 and heavy metals (Hg2+ and As3+), providing evidence of high stability and robustness under harsh conditions. Results obtained demonstrate their equal or even superior performance when compared to antibodies. We established the use of aptamer-functionalized multilayered label particles (PEI-grafted gold decorated polystyrene) with high stability as label particles. These particles address the well known drawback of non-selective aggregation typical of traditional naked Gold nanoparticles. The outstanding stability of these multilayered labels was demonstrated when used in an enhanced version of the lateral flow assay for detection of E. coli O157:H7 (state of the art for paper-based colorimetric detection of whole cell bacteria), and in a multiplexed paper-based microfluidic device for dual detection of Mercury and Arsenic. This work sets the foundation of the development of a next generation of health care and environmental monitoring devices that are portable, sensitive, quantitative, and can reliably detect multiple targets with one single test.
ExoMol photodissociation cross sections I: HCl and HF
Creators: name: Pezzella, Marco
name: Tennyson, Jonathan
name: Yurchenko, Sergei N.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Photon initiated chemistry, \textit{i.e.} the interaction of light with chemical species, is a key factor in the evolution of the atmosphere of exoplanets. For planets orbiting stars in UV-rich environments, photodissociation induced by high energy photons dominates the atmosphere composition and dynamics. The rate of photodissociation can be highly dependent on atmospheric temperature, as increased temperature leads to increased population of vibrational excited states and the consequent lowering of the photodissociation threshold. This paper inaugurates a new series of papers presenting computed temperature-dependent photodissociation cross sections with rates generated for different stellar fields. Cross sections calculations are performed by solving the time-independent Schrödinger equation for each electronic state involved in the process. Here photodissociation cross sections for hydrogen chloride and hydrogen fluoride are computed for a grid of 34 temperatures between 0 and 10~000 K. Use of different radiation fields shows that for the Sun and cooler stars the photodissociation rate can increase exponentially for molecular temperatures above 1000 K; conversely the photodissociation rates in UV rich fields instead are almost insensitive to the temperature of the molecule. Furthermore, these rates show extreme sensitivity to the radiation model used for cool stars, suggesting that further work on these may be required. The provision of an ExoMol database of cross sections is discussed.
Amaryllis Haswell 1879
Creators: name: Senna, André R.
name: Serejo, Cristiana S.
Publisher: name: Zenodo
Year: 2008
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Amphipoda
Lysianassidae
Amaryllis

description: Genus Amaryllis Haswell, 1879
Type species: Amaryllis macrophthalma Haswell, 1879
Genus diagnosis. Mouthparts forming a subconical bundle. Pereopod 4, coxa with anterior and posterior margins subparallels. Pereopods 5–7 with distal articles elongate. Uropod 3, rami lanceolate; without plumose setae in males and females; outer ramus 1-articulate.
(Lowry & Stoddart, 2002)
Composition of the genus. The genus Amaryllis contains 14 species: Amaryllis atlantica sp. nov.; A. brevicornis Haswell, 1879; A. carrascoi Lowry & Stoddart, 2002; A. croca Lowry & Stoddart, 2002; A. dianae Lowry & Stoddart, 2002; A. kamata Lowry & Stoddart, 2002; A. keablei Lowry & Stoddart, 2002; A. macrophthalma Haswell, 1879; A. migo Lowry & Stoddart, 2002; A. moona Lowry & Stoddart, 2002; A. olinda Lowry & Stoddart, 2002; A. quokka Lowry & Stoddart, 2002; A. philatelica Lowry & Stoddart, 2002; and A. spencerensis Lowry & Stoddart, 2002.
description: Published as part of Senna, André R. & Serejo, Cristiana S., 2008, Amaryllididae and Lysianassidae (Amphipoda: Lysianassoidea) from off the central coast of Brazil (11 ºS – 22 ºS), with descriptions of three new species, pp. 45-68 in Zootaxa 1718 on page 46, DOI: 10.5281/zenodo.181025
The relic galaxy NGC~1277 rules out intermediate-age stellar populations origin of CO-strong absorptions in massive early-type galaxies
Creators: name: Eftekhari, Elham
name: La Barbera, Francesco
name: Vazdekis, Alexandre
name: Beasley, Michael
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Massive Early-Type Galaxies (ETGs) show several strong CO absorption features in their H- and K-band spectra that cannot be explained by state-of-the-art stellar population models. For many years, the disagreement has been attributed to the presence of intermediate-age stellar components that are dominated by stars in the Asymptotic Giant Branch (AGB) phase. However, no robust evidence of this scenario has been provided so far. One way to test this claim is by comparison of CO indices for ETGs and for relic galaxies. Lacking the intermediate-age stellar populations, relic galaxies provide us with a unique opportunity to address the origin of strong CO absorptions in ETGs. Here, we utilize the prototype relic galaxy NGC 1277 and compare the CO absorption features of this galaxy with the ones of a representative sample of massive ETGs. We show that the CO lines in both systems have similar strengths, significantly stronger than the predictions of stellar population synthesis models. We conclude that intermediate-age stellar populations in massive ETGs are not the culprit of the strong CO absorptions.
description: 6 pages, 3 figures, accepted for publication in MNRAS Letters
Sonnenfleckenzeichnung, unnummeriert.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 14.03.1931, erstellt von Friedrich Buser in der privaten Beobachtungsstation im Prätschli in Arosa
Creators: name: Buser, Friedrich
Publisher: name: [s.n.]
Year: 1931

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der privaten Beobachtungsstation Prätschli in Arosa. Instrument: 11-cm-Refraktor von Steinheil.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen
description: ETH-Bibliothek
Sonnenfleckenzeichnung, unnummeriert.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 12.03.1931, erstellt von Friedrich Buser in der privaten Beobachtungsstation im Prätschli in Arosa
Creators: name: Buser, Friedrich
Publisher: name: [s.n.]
Year: 1931

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der privaten Beobachtungsstation Prätschli in Arosa. Instrument: 11-cm-Refraktor von Steinheil.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen
description: ETH-Bibliothek
Linking Experimental Capillary Pressure-Saturation Data with Lattice Boltzmann Simulations.
Creators: name: Schaap, Marcel
name: Christensen, Britt
name: Porter, Mark
name: Wildenschild, Dorthe
name: Schaap, Marcel
Publisher: name: XVI International Conference on Computational Methods in Water Resources
Year: 2006

description: Recent advances in observational and computational techniques have facilitated the
study of fluid dynamics and interfacial geometry in porous media. Within some
experimental limitations, computed tomography X-ray (CMT) and magnetic resonance
imaging (MRI) are now able to accurately map the 3D structure of porous geometries.
Computational advances largely concern Lattice Boltzmann (LB) method that has  been
shown to be useful in simulating microscale flow in porous media.  With some
phenomenological or thermodynamic extensions, the LB method is also able to deal with
microscale interfacial phenomena in single or multiphase systems.
	The goal of this presentation is to provide insight into what is needed to make a
link between 3D experimental observations of interfacial geometry and LB simulations.
 The experimental data consist of CMT observations several Sotrol-water displacements
 inside a glass bead system with a resolution of 17 microns. Also available are
capillary pressure-saturation curves  between 0 and 1kPa. The LB model is that of
Shan-Chen as modified by Martys and Chen (1996).  We present the most parsimonious
way to calibrate the surface tension and contact angle in the model, define space,
pressure and time scaling.  We will also identify potential problems relating to
pore-size and digitization effects that are present in the simulations, but not in
the original observations.  The analyses are partly performed on idealized systems
and finally applied to large scale (107 voxel) simulations of the real physical
systems.  Observations are simulations are compared in terms of pressure-saturation
curves, and where possible, in terms of fluid distribution and interfacial curvatures.
Bifurcation and chaos in one dimensional chains of small particles
Creators: name: Simas, Fabiano C.
name: Nobrega, K. Z.
name: Bazeia, D.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: This work deals with bifurcation and the chaotic behavior in one dimensional chains of small particles. We consider two distinct possibilities, one where the particles are modeled by a fourth-order potential which was already studied. We revisit this system and bring novelties concerning the presence of the three-armed star behavior and the study of the corresponding Lyapunov exponent. The other system is new, and there the particles are more involved and modeled by an eighth-order potential. We investigate this new system within the same approach, emphasizing the behavior of the orbits, the bifurcation profile and the corresponding Lyapunov exponent.
description: Accepted for publication in Chaos, Solitons and Fractals
Sonnenfleckenzeichnung, unnummeriert.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 24.01.1931, erstellt von James Peter Rowland am Stonyhurst Observatory in Lancashire
Creators: name: Sternwarte Stonyhurst Observatory am Stonyhurst College in Lancashire
Publisher: name: [s.n.]
Year: 1931

description: Bleistiftzeichnung mit Farbstift überschrieben, erstellt als Projektionsbildzeichnung am Stonyhurst Observatory in Lancashire. Instrument: unbekannt.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen
description: ETH-Bibliothek
The magnetic field of the stripped primary in the upsilon Sgr system, a member of the rare class of hydrogen-deficient binaries
Creators: name: Hubrig, S.
name: Jarvinen, S. P.
name: Ilyin, I.
name: Schöller, M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present the results of high-resolution spectropolarimetric observations of the optically dominant component in the rare hydrogen-deficient binary system upsilon Sgr. Only a small number of such systems in a very late phase of helium shell burning are currently known. The mass transfer from the donor star in binary systems usually leads to the stripping of its hydrogen envelope. Consequently, since the mass of the secondary increases, it appears rejuvenated. Using a few ESO FORS1 low-resolution spectropolarimetric observations of this system, Hubrig et al. announced in 2009 the presence of a magnetic field of the order of -70 - -80G. Here we report on more recent high-resolution ESO HARPS spectropolarimetric observations showing that the primary in upsilon Sgr is a spectrum variable star and possesses a weak magnetic field of the order of a few tens of Gauss. The detection of a magnetic field in this rare hydrogen-deficient binary is of particular interest, as such systems are frequently discussed as probable progenitors of core-collapse supernovae and gravitational-wave sources. Future magnetic studies of such systems will be worthwhile to gain deeper insights into the role of magnetic fields in the evolution of massive stars in binary systems.
description: 7 pages, 2 tables, 2 figures, accepted for publication in ApJ
Sonnenfleckenzeichnung, unnummeriert.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 02.07.1931, erstellt von Friedrich Buser in der privaten Beobachtungsstation im Prätschli in Arosa
Creators: name: Buser, Friedrich
Publisher: name: [s.n.]
Year: 1931

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der privaten Beobachtungsstation Prätschli in Arosa. Instrument: 11-cm-Refraktor von Steinheil.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen
description: ETH-Bibliothek
Sonnenfleckenzeichnung, unnummeriert.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 11.01.1931, erstellt von Friedrich Buser in der privaten Beobachtungsstation im Prätschli in Arosa
Creators: name: Buser, Friedrich
Publisher: name: [s.n.]
Year: 1931

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der privaten Beobachtungsstation Prätschli in Arosa. Instrument: 11-cm-Refraktor von Steinheil.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen
description: ETH-Bibliothek
Pore-scale modelling of dynamic capillary pressure: the role of fluid viscosities and length scale
Creators: name: Gielen, Twan
name: Hassanizadeh, Majid
name: H.K. Dahle, Helge
name: Celia, Michael
name: Gielen, Twan
Publisher: name: XVI International Conference on Computational Methods in Water Resources
Year: 2006

description: Traditional theories of multiphase flow rely on capillary pressure and saturation
relationships that are measured under equilibrium conditions. To incorporate
transient behaviour, new multiphase flow theories have been proposed. These include
an extended capillary pressure-saturation relationship that is valid under dynamic
conditions. In this relationship, the difference between the two fluid pressures is
called dynamic capillary pressure, and is assumed to be a function of saturation
and its time rate of change. The dependency is through a so-called damping
coefficient.
In this work, a dynamic pore-scale network model is applied to investigate the
parameters this coefficient depends on. The model consists of a three-dimensional
lattice of cylindrical pore throats connected to each other by spherical pore
bodies. In our numerical drainage experiments, nonwetting fluid is PCE and water is
wetting fluid.
Following Stauffer (a), we investigate the dependencies of the damping coefficient,
focussing on the influence of fluid viscosities and length scale. For the drainage
experiments in unsaturated porous media, Stauffer found a constant damping
coefficient.
In our previous work, the damping coefficient has been shown to be a function of
saturation. We now show that the damping coefficient also depends on the interplay
of the two fluid viscosities. Finally, the influence of length scale on the value
of the damping coefficient will be discussed.

a) Stauffer, F., Time dependence of the relations between capillary pressure, water
content and conductivity during drainage of porous media, Proceedings of
International IAHR Symposium on Scale Effects in Porous Media, Thessaloniki,
Greece, August 29-Sept 1, 1978
Sonnenfleckenzeichnung, unnummeriert.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 18.03.1931, erstellt von Friedrich Buser in der privaten Beobachtungsstation im Prätschli in Arosa
Creators: name: Buser, Friedrich
Publisher: name: [s.n.]
Year: 1931

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der privaten Beobachtungsstation Prätschli in Arosa. Instrument: 11-cm-Refraktor von Steinheil.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen
description: ETH-Bibliothek
Sonnenfleckenzeichnung, unnummeriert.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 02.05.1931, erstellt von Friedrich Buser in der privaten Beobachtungsstation im Prätschli in Arosa
Creators: name: Buser, Friedrich
Publisher: name: [s.n.]
Year: 1931

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der privaten Beobachtungsstation Prätschli in Arosa. Instrument: 11-cm-Refraktor von Steinheil.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen
description: ETH-Bibliothek
Sonnenfleckenzeichnung, unnummeriert.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 04.05.1931, erstellt von Friedrich Buser in der privaten Beobachtungsstation im Prätschli in Arosa
Creators: name: Buser, Friedrich
Publisher: name: [s.n.]
Year: 1931

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der privaten Beobachtungsstation Prätschli in Arosa. Instrument: 11-cm-Refraktor von Steinheil.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen
description: ETH-Bibliothek
Sonnenfleckenzeichnung, unnummeriert.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 09.02.1931, erstellt von Friedrich Buser in der privaten Beobachtungsstation im Prätschli in Arosa
Creators: name: Buser, Friedrich
Publisher: name: [s.n.]
Year: 1931

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der privaten Beobachtungsstation Prätschli in Arosa. Instrument: 11-cm-Refraktor von Steinheil.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen
description: ETH-Bibliothek
Geo-electrical data fusion by stochastic co-conditioning simulations for delineating groundwater protection zones
Creators: name: DASSARGUES, Alain
name: DASSARGUES, Alain
Publisher: name: XVI International Conference on Computational Methods in Water Resources
Year: 2006

description: In hydrogeology, advances in the delimitation of protection zones are made by the use
of stochastic simulations integrating all available data. In practice, due to the few
available measurements of the main parameters (hard data), it is very useful to
integrate several secondary properties of the media as indirect data (soft data) to
reduce the uncertainty of the results. In aquifers, most of the solute spreading is
governed by the hydraulic conductivity (K) spatial variability, which is generally
considered as the main uncertain parameter. A stochastic approach integrating
hydraulic conductivity measurements (hard data), head observations and shallow
electrical resistivity tomography (soft data) is presented. Results are discussed on
a synthetic and on a practical case. It is shown in practice how the uncertainty of
the well capture zone probability distribution (CaPD) can be reduced. Since
geophysical data and head observations are easier to collect on the field then
hydraulic conductivity measurements, they are generally more abundant. The
methodology presented can even be used in real applications when little or no
information is available about the hydraulic properties, through the conditioning on
geophysical data and/or head observations.