cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Mitigating potentially hazardous asteroid impacts revisited
Creators: name: Regaly, Zs.
name: Frohlich, V.
name: Berczik, P.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: Context: Potentially hazardous asteroids (PHA) in Earth-crossing orbits pose a constant threat to life on Earth. Several mitigation methods have been proposed, and the most feasible technique appears to be the disintegration of the impactor and the generation of a fragment cloud by explosive penetrators at interception. However, mitigation analyses tend to neglect the effect of orbital dynamics on the trajectory of fragments. Aims: We aim to study the effect of orbital dynamics of the impactor's cloud on the number of fragments that hit the Earth, assuming different interception dates. We investigate the effect of self-gravitational cohesion and the axial rotation of the impactor. Methods: We computed the orbits of 10^5 fragments with a high-precision direct N-body integrator of the eighth order, running on GPUs. We considered orbital perturbations from all large bodies in the Solar System and the self-gravity of the cloud fragments. Results: Using a series of numerical experiments, we show that orbital shear causes the fragment cloud to adopt the shape of a triaxial ellipsoid. The shape and alignment of the triaxial ellipsoid are strongly modulated by the cloud's orbital trajectory and, hence, the impact cross-section of the cloud with respect to the Earth. Therefore, the number of fragments hitting the Earth is strongly influenced by the orbit of the impactor and the time of interception. A minimum number of impacts occur for a well-defined orientation of the impactor rotational axis, depending on the date of interception. Conclusions: To minimise the lethal consequences of an PHA's impact, a well-constrained interception timing is necessary. A too-early interception may not be ideal for PHAs in the Apollo or Aten groups. Thus, we find that the best time to intercept PHA is when it is at the pericentre of its orbit.
description: Accepted for publication in A&A Letters (some refs. update)
in-vitro culture of Orchids through Seeds and other plant parts- where we stand now?
Creators: name: Mahamaya Banik1, Ajit Kumar Mandal2, Suman Natta1, S.S. Biswas1, L.C. De1, Bharat Kumar Alam1, Sankar Prasad Das1
Publisher: name: The Science world a Monthly e magazine
Year: 2023

description: Orchids are blessed with spell bounding beauties, shape, size, colour and these features make orchid flowers tremendously attractive.  Craze for these flowers is too high, people all over the world fantasize to have those in their flower vase and polyhouses. In nature orchid species are one of the most diverse flowering plant groups. Besides having astonishing beauty some of the orchids also possess therapeutic properties. They can be propagated through in-vitro culture of seeds and meristematic parts. Propagation through meristem parts is crucial for commercial purpose as only meristem culture can produce true to the type genotypic similarities in orchids. Tissue culture by means of seeds culture may derive progenies with heterogeneous genotypes and phenotypes as well as the plants take much longer time to flower as compared to the plants produced through meristem culture. Thus, propagation through meristem culture may be considered as the best way to produce best quality orchid planting materials as per the market demand. This review is a comprehensive synthesis of updated information pertains to orchid meristem culture aiming for quality produce which may be beneficial for all the stakeholders.
Ultra-Sensitive Extinction Measurements of Optically Active Defects in Monolayer MoS$_2$
Creators: name: Sigger, Florian
name: Amersdorffer, Ines
name: Hötger, Alexander
name: Nutz, Manuel
name: Kiemle, Jonas
name: Taniguchi, Takashi
name: Watanabe, Kenji
name: Förg, Michael
name: Noe, Jonathan
name: Finley, Jonathan J.
name: Högele, Alexander
name: Holleitner, Alexander W.
name: Hümmer, Thomas
name: Hunger, David
name: Kastl, Christoph
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We utilize cavity-enhanced extinction spectroscopy to directly quantify the optical absorption of defects in MoS$_2$ generated by helium ion bombardment. We achieve hyperspectral imaging of specific defect patterns with a detection limit below 0.01% extinction, corresponding to a detectable defect density below $10^{11}$ cm$^{-2}$. The corresponding spectra reveal a broad sub-gap absorption, being consistent with theoretical predictions related to sulfur vacancy-bound excitons in MoS$_2$. Our results highlight cavity-enhanced extinction spectroscopy as efficient means for the detection of optical transitions in nanoscale thin films with weak absorption, applicable to a broad range of materials.
description: 17 pages main manuscript, 7 pages supporting information
A Hybrid Integrated Quantum Key Distribution Transceiver Chip
Creators: name: Dolphin, Joseph A.
name: Paraiso, Taofiq K.
name: Du, Han
name: Woodward, Robert I.
name: Marangon, Davide G.
name: Shields, Andrew J.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum photonic technologies, such as quantum key distribution, are already benefiting greatly from the rise of integrated photonics. However, the flexibility in design of these systems is often restricted by the properties of the integration material platforms. Here, we overcome this choice by using hybrid integration of ultra-low-loss silicon nitride waveguides with indium phosphide electro-optic modulators to produce high-performance quantum key distribution transceiver chips. Access to the best properties of both materials allows us to achieve active encoding and decoding of photonic qubits on-chip at GHz speeds and with sub-1% quantum bit error rates over long fibre distances. We demonstrate bidirectional secure bit rates of 1.82 Mbps over 10 dB channel attenuation and positive secure key rates out to 250 km of fibre. The results support the imminent utility of hybrid integration for quantum photonic circuits and the wider field of photonics.
description: 13 pages, 5 figures, 1 table
SHPO: Programmatic Agreement between the 45th Space Sing, United Space Air Force and the Florida State Historic Preservation Officer Regarding the Protection of Archaeological Resources and the Rehabilitation, Maintenance, Documentation, and Development of Historic Structures within Cape Canaveral Air Force Station
Creators: name: Anthrony J. Cotton
name: Bendus, Robert F.
Publisher: name: 45th Space Wing, USAF
Year: 2011
Subjects: subject: Florida (State / Territory)
valueUri: https://core.tdar.org/browse/geographic-keyword/2273/florida-state-territory
subject: Cape Canaveral
valueUri: https://core.tdar.org/browse/geographic-keyword/23155/cape-canaveral
subject: Brevard (County)
valueUri: https://core.tdar.org/browse/geographic-keyword/14443/brevard-county
subject: Programmatic Agreement
valueUri: https://core.tdar.org/browse/other-keyword/153821/programmatic-agreement
subject: Cape Canaveral Air Force Station
valueUri: https://core.tdar.org/browse/other-keyword/96049/cape-canaveral-air-force-station
subject: Architectural Documentation
valueUri: https://core.tdar.org/browse/investigation-type/16/architectural-documentation
subject: Historic Background Research
valueUri: https://core.tdar.org/browse/investigation-type/18/historic-background-research
subject: Consultation
valueUri: https://core.tdar.org/browse/investigation-type/4/consultation
subject: Records Search / Inventory Checking
valueUri: https://core.tdar.org/browse/investigation-type/8/records-search-inventory-checking
subject: Site Evaluation / Testing
valueUri: https://core.tdar.org/browse/investigation-type/10/site-evaluation-testing

description: Programmatic Agreement between the 45th Space Sing, United Space Air Force and the Florida State Historic Preservation Officer Regarding the Protection of Archaeological Resources and the Rehabilitation, Maintenance, Documentation, and Development of Historic Structures within Cape Canaveral Air Force Station
On the Institutional Quality of the Belt and Road Initiative as a Hybrid International Public Good
Creators: name: Öztürk, Ibrahim
Publisher: name: Asien
Year: 2022

description: n the emerging world of multipolarity, which is characterized by political and economic oligopolistic spheres of influence, the creation of international public goods (IPGs) involves different sets of hybrid regimes. The term "hybridity" refers to the need for balanced and virtuous cross-fertilization between the newly emerging and the established systemic considerations such as openness versus autonomy/sovereignty and the market versus the state to cope with their spatial/supranational and intergenerational spillovers. Chinese authorities presented the Belt and Road Initiative (BRI) as such an endeavour to serve as a hybrid governance platform for bringing cooperative solutions to existing infrastructure deficits, mainly in Asia and Africa. This article questions the governance quality of the BRI in bringing cooperative and win-win solutions through the lenses of the comparative institutional economic perspective. The paper concludes that despite its striking quantitative achievements, BRI's weak institutional structure has already caused several managerial-coordination problems, geopolitical rivalries, and global tensions that might prevent its evolution with the qualities of a needed hybrid IPG. The article suggests that for BRI to adequately address both the conflicting and overlapping demand and supply conditions of a needed hybrid public good, it should effectively align with the existing rules-based and structured multilateral cooperation architecture.
description: Asien, Nr. 154/155 (2020): ASIEN (Januar/April)
Simulated Altitude Testing of the Apollo Service Module Propulsion System (Report I, Phase II Development Test)
Creators: name: G. H. Schulz
name: J. F. DeFord
Publisher: name: ARO, Inc.
Year: 1966
Subjects: subject: Florida (State / Territory)
valueUri: https://core.tdar.org/browse/geographic-keyword/2273/florida-state-territory
subject: Cape Canaveral
valueUri: https://core.tdar.org/browse/geographic-keyword/23155/cape-canaveral
subject: Brevard (County)
valueUri: https://core.tdar.org/browse/geographic-keyword/14443/brevard-county
subject: Cape Canaveral Air Force Station
valueUri: https://core.tdar.org/browse/other-keyword/96049/cape-canaveral-air-force-station

description: The Apollo Service Module (S/M) propulsion system, tested at AEDC, consisted of the Aerojet-General Corporation AJ10-137 flight type rocket engine and a North American Aviation ground test replica of the Apollo S/M propellant system and was subjected to simulated altitudes up to 120,000 ft during engine firing operation. The testing reported herein was conducted with the first three engines assemblies of the AEDC Phase II development program and included 74 test firings with an accumulated duration of 1561.2 seconds. The primary objectives of the test were to check out system operation, define propulsion system altitude performance, and prove engine structural endurance over ranges of propellant mixture ratio and combustion chamber pressure. Engine gimbaling operations were performed during certain firings. Ballistic performance of the three engine assemblies tested is presented. Engine temperature data, the effect of ablation on the thrust vector, and a discussion of engine gimbal operation are also presented.
Color Transformations of Photometric Measurements of Galaxies in Optical and Near-Infrared Wide-Field Imaging Surveys
Creators: name: Toptun, Victoria A.
name: Chilingarian, Igor V.
name: Grishin, Kirill A.
name: Katkov, Ivan Yu.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Over the past 2 decades, wide-field photometric surveys in optical and infrared domains reached a nearly all-sky coverage thanks to numerous observational facilities operating in both hemispheres. However, subtle differences among exact realizations of Johnson and SDSS photometric systems require one to convert photometric measurements into the same system prior to analysis of composite datasets originating from multiple surveys. It turns out that the published photometric transformations lead to substantial biases when applied to integrated photometry of galaxies from the corresponding catalogs. Here we present photometric transformations based on piece-wise linear approximations of integrated photometry of galaxies in the optical surveys SDSS, DECaLS, BASS, MzLS, DES, DELVE, KiDS, VST ATLAS, and the near-infrared surveys UKIDSS, UHS, VHS, and VIKING. We validate our transformations by constructing k-corrected color-magnitude diagrams of non-active galaxies and measuring the position and tightness of the "red sequence". We also provide transformations for aperture magnitudes and show how they are affected by the image quality difference among the surveys. We present the implementation of the derived transformations in Python and IDL and also a web-based color transformation calculator for galaxies. By comparing DECaLS and DES, we identified systematic issues in DECaLS photometry for extended galaxies, which we attribute to the photometric software package used by DECaLS. As an application of our method, we compiled two multi-wavelength photometric catalogs for over 200,000 low- and intermediate-redshift galaxies originating from CfA FAST and Hectospec spectral archives.
description: 24 pages, 21 figures, published in PASP. The "Color transformations" web service and the Python and IDL codes are available at https://colors.voxastro.org/
Updated optical design and trade-off study for MOONS, the Multi-Object Optical and Near Infrared spectrometer for the VLT
Creators: name: Oliva, E.
name: Todd, S.
name: Cirasuolo, M.
name: Schnetler, H.
name: Lunney, D.
name: Rees, P.
name: Bianco, A.
name: Diolaiti, E.
name: Ferruzzi, D.
name: Fisher, M.
name: Guinouard, I.
name: Iuzzolino, M.
name: Parry, I.
name: Sun, X.
name: Tozzi, A.
name: Vitali, F.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: This paper presents the latest optical design for the MOONS triple-arm spectrographs. MOONS will be a Multi-Object Optical and Near-infrared Spectrograph and will be installed on one of the European Southern Observatory (ESO) Very Large Telescopes (VLT). Included in this paper is a trade-off analysis of different types of collimators, cameras, dichroics and filters.
description: 10 pages, 8 figures, 5 tables. Presented at SPIE Astronomical Telescope + Instrumentation 2014 (Ground-based and Airbone Instrumentation for Astronomy 5, 9147-84). To be published in Proceeding of SPIE Volume 9147
SHPO: Determination of National Register of Historic Places Eligibility for 76 United States Air Force (USAF) Owned Weather Monitoring Sites in Brevard, Indian River, Martin and Volusia Counties
Creators: name: Frady, Christopher
Year: 2016
Subjects: subject: Florida (State / Territory)
valueUri: https://core.tdar.org/browse/geographic-keyword/2273/florida-state-territory
subject: Cape Canaveral
valueUri: https://core.tdar.org/browse/geographic-keyword/23155/cape-canaveral
subject: Brevard (County)
valueUri: https://core.tdar.org/browse/geographic-keyword/14443/brevard-county
subject: Cape Canaveral Air Force Station
valueUri: https://core.tdar.org/browse/other-keyword/96049/cape-canaveral-air-force-station
subject: Weather Sites
valueUri: https://core.tdar.org/browse/other-keyword/164536/weather-sites
subject: Architectural Documentation
valueUri: https://core.tdar.org/browse/investigation-type/16/architectural-documentation
subject: Reconnaissance / Survey
valueUri: https://core.tdar.org/browse/investigation-type/7/reconnaissance-survey
subject: Records Search / Inventory Checking
valueUri: https://core.tdar.org/browse/investigation-type/8/records-search-inventory-checking

description: The 45th Space Wing conducted a historical survey and evaluation of seventy-six United States Air Force (USAF) owned weather monitoring stations in Brevard, Indian River, Martin and Volusia Counties. The USAF determined that the resources did not appear to meet the criteria for listing in the National Register. Based on the information provided, the SHPO concurred that the seventy-six resources do not appear to meet the criteria to be considered eligible for listing on the National Register.
Triangulation in participation: Dynamic approaches for science-practice interaction in land-use decision making in rural China
Creators: name: Wang, Jue
name: Aenis, Thomas
name: Hofmann-Souki, Susanne
Publisher: name: Humboldt-Universität zu Berlin
Year: 2018
Subjects: subject: Stakeholder participation
subject: Method triangulation
subject: Sustainable land use
subject: Southwest China
subject: 710 Städtebau, Raumplanung, Landschaftsgestaltung

description: Land use decision making requires knowledge integration from a wide range of stakeholders across science and practice. Many participatory methods and instruments aiming at such science-practice interaction have been developed during the last decades. However, there are methodological challenges, and little evidence neither about the methodological applicability and practicability under diverse socio-political conditions nor about their dynamics. The objective of this paper is to offer some insights on the design and implementation of reasonable science-practice interaction. The Chinese-German project SURUMER (Sustainable rubber cultivation in the Mekong region) served as a case study with the aim of developing sustainable land use strategies for rubber cultivation in southwest China. A triangulation of methods tailor-made for every specific stakeholder group allows the gradual deepening and broadening of participation in problem definition, knowledge generation, development of applicable solutions and implementation. The composition of methods should be reflected on and adjusted to the communication demands of specific stakeholder groups during project phases. It is important to invest in trust-building and allow time and space for the adaptation of approaches, especially in communities where participation is not a tradition.
Analyzes of Algebraic Classification of Higher Dimensional Kundt Geometries with Large $D$ Method
Creators: name: Kirezli, Pınar
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this paper, classification of higher dimensional Kundt geometry is revisited as the dimension of the spacetime $D \rightarrow\infty$. In addition to previous studies, in order to Kundt geometry becomes algebraically special spacetime obligatory conditions are determined. Additionally, Type II, Type III, Type N, Type O and Type D Kundt geometries are explicitly analyzed. Classification of several metrics such as pp-waves, non-gyratonic Kundt metric and VSI spacetime, which are well-known subclasses of Kundt geometry are studied.
description: Accepted for publication in Turkish Journal of Physics
Launch Complex 43, 40 and 41 Construction Photos
Creators: name: Fernandez, Rachel
Year: 2021
Subjects: subject: Florida (State / Territory)
valueUri: https://core.tdar.org/browse/geographic-keyword/2273/florida-state-territory
subject: Cape Canaveral
valueUri: https://core.tdar.org/browse/geographic-keyword/23155/cape-canaveral
subject: Brevard (County)
valueUri: https://core.tdar.org/browse/geographic-keyword/14443/brevard-county
subject: Launch Complex 40
valueUri: https://core.tdar.org/browse/site-name/116416/launch-complex-40
subject: Launch Complex 43
valueUri: https://core.tdar.org/browse/site-name/117506/launch-complex-43
subject: Launch Complex 41
valueUri: https://core.tdar.org/browse/site-name/117500/launch-complex-41
subject: Cape Canaveral Air Force Station
valueUri: https://core.tdar.org/browse/other-keyword/96049/cape-canaveral-air-force-station
subject: Architectural Documentation
valueUri: https://core.tdar.org/browse/investigation-type/16/architectural-documentation
subject: Architectural Survey
valueUri: https://core.tdar.org/browse/investigation-type/2/architectural-survey
subject: Remote Sensing
valueUri: https://core.tdar.org/browse/investigation-type/22/remote-sensing

description: Construction photos of Launch Complex 43, 40, and 41.
Doing Discourse Research in Chinese Studies: Methodological Reflections on the Basis of Studying Green Consumption and Population Policy
Creators: name: Fröhlich, Franziska
name: Alpermann, Björn
Publisher: name: Asien
Year: 2022

description: As Chinese Studies and other Area Studies have become increasingly sophisticated in the methodologies they use, more in-depth discussions on researchers’ discourseanalytic practices seem desirable. This article is thus a methodological reflection, coming as part of the authors’ own ongoing research projects. It describes some of the characteristic ways in which discourse fields in the Chinese context are structured, as well as the underlying rules at work. Specifically, discourses in China are politically constrained through “soft steering under the shadow of hierarchy,” structured in a top-down manner through the “follow the leader imperative,” and bloated due to a bandwagon effect. It is argued that these specificities of the Chinese discourse context pose a challenge for researchers doing discourse research on the country. The article therefore offers examples from two research projects on green consumption and eco-motivated diets and on population policy in China so as to present the strategies that the authors have applied in their own research to deal with such challenges.
description: Asien, Nr. 154/155 (2020): ASIEN (Januar/April)
Nanosecond spin lifetimes in single- and few-layer graphene-hBN heterostructures at room temperature
Creators: name: Drögeler, Marc
name: Volmer, Frank
name: Wolter, Maik
name: Terrés, Bernat
name: Watanabe, Kenji
name: Taniguchi, Takashi
name: Güntherodt, Gernot
name: Stampfer, Christoph
name: Beschoten, Bernd
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We present a new fabrication method of graphene spin-valve devices which yields enhanced spin and charge transport properties by improving both the electrode-to-graphene and graphene-to-substrate interface. First, we prepare Co/MgO spin injection electrodes onto Si$^{++}$/SiO$_2$. Thereafter, we mechanically transfer a graphene-hBN heterostructure onto the prepatterned electrodes. We show that room temperature spin transport in single-, bi- and trilayer graphene devices exhibit nanosecond spin lifetimes with spin diffusion lengths reaching 10$μ$m combined with carrier mobilities exceeding 20,000 cm$^2$/Vs.
description: 15 pages, 5 figures
The first two-dimensional stellar structure and evolution models of rotating stars
Creators: name: Mombarg, Joey S. G.
name: Rieutord, Michel
name: Lara, Francisco Espinosa
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Rotation is a key ingredient in the theory of stellar structure and evolution. Until now, stellar evolution codes operate in a 1-D framework for which the validity domain in regards to the rotation rate is not well understood. This letter aims at presenting the first results of self-consistent stellar models in two spatial dimensions that compute the time evolution of a star and its rotation rate along the main sequence together with a comparison to observations. We make use of an extended version of the ESTER code that solves the stellar structure of a rotating star in two dimensions with time evolution, including chemical evolution, and an implementation of rotational mixing. We have computed evolution tracks for a 12Msun model, once for an initial rotation rate equal to 15% of the critical frequency, and once for 50%. We first show that our model initially rotating at 15% of the critical frequency is able to reproduce all the observations of the $β$ Cephei star HD 192575 recently studied by Burssens et al. with asteroseismology. Beyond the classical surface parameters like effective temperature or luminosity, our model also reproduces the core mass along with the rotation rate of the core and envelope at the estimated age of the star. This particular model also shows that the meridional circulation has a negligible influence on the transport of chemical elements, like nitrogen, for which the abundance may be increased at the stellar surface. Furthermore, it shows that in the late main sequence, nuclear evolution is faster than the relaxation time needed to reach a steady state of the star angular momentum distribution. We have demonstrated that we have successfully taken the new step towards 2-D evolutionary modelling of rotating stars. It opens new perspectives on the understanding of the dynamics of fast rotating stars and on the way rotation impacts stellar evolution.
description: Accepted for publication in Astronomy & Astrophysics Letters, 9 pages
Additional file 11 of Proteomics identifies differences in fibrotic potential of extracellular vesicles from human tendon and muscle fibroblasts
Creators: name: Yeung, Ching-Yan Chloé
name: Schoof, Erwin M.
name: Tamáš, Michal
name: Mackey, Abigail L.
name: Kjaer, Michael
Publisher: name: figshare
Year: 2020
Subjects: subject: Biochemistry
subject: Space Science
subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Neuroscience
subject: Physiology
subject: Pharmacology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences

description: Additional file 10 Supplementary Figure 1. Overview of expansion of muscle tissue and tendon cells for small EV isolation. a Illustrative overview of cell isolation and expansion for small EV isolation from differentiating myoblasts, muscle fibroblasts and tendon fibroblasts (n = 5 except n = 4 for FibX because muscle fibroblasts from prep 5* did not proliferate enough for small EV isolation). b Table of information for the five samples used for LC-MS. c Transmission electron microscopy images (TEM) of negative-stained EV isolates. Bars, 200 nm. (D) Measured diameter of EVs from TEM images. At least 300 measurements for each sample (n = 3 biological samples). Supplementary Figure 2. Variances of small EV protein abundance detected by LC/MS. a Summary of protein exclusion for statistical analysis by iDEP. b-c Distribution of log transformed protein abundances in MyoX, TenX and FibX as detected by LC-MS shown in a box plot (b) and a density plot (c). Supplementary Figure 3. Characterisation of protein content of isolated EVs. a-f Heatmaps showing the levels of protein detected in MyoX, TenX and FibX samples that are proteins enriched in EVs (a), cytosolic proteins recovered in EVs via lipid or membrane protein-binding ability (b) or promiscuous incorporation (c), proteins that have are commonly co-isolated with EVs (d), and secreted proteins recovered with EVs (e).
MWC 656 is unlikely to contain a black hole
Creators: name: Janssens, S.
name: Shenar, T.
name: Degenaar, N.
name: Bodensteiner, J.
name: Sana, H.
name: Audenaert, J.
name: Frost, A. J.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Context. MWC 656 was reported as the first known Be star with a black-hole (BH) companion in a 60 d period. The mass of the proposed BH companion is estimated to be between 4 - 7 MSun. This estimate is based on radial velocity (RV) measurements derived from the Fe ii 4583 emission line of the Be star disc and from the He ii 4686 emission line, assumed to be formed in a disc around the putative BH. Aims. Using new high-resolution spectroscopic data, we investigate whether MWC 656 truly contains a BH. Methods. We used the cross-correlation method to calculate the RVs of both the Be star and the He ii 4686 emission line and we derive a new orbital solution. We also performed disentangling to look for the spectral signature of a companion. Results. We derive an orbital period of 59.028 +- 0.011 d and a mass ratio q = M_Heii/M_Be = 0.12 +- 0.03, much lower than the previously reported q = 0.41 +- 0.07. Adopting a mass of the Be star of M_Be = 7.8 +- 2.0MSun, the companion has a mass of 0.94 +- 0.34MSun. For the upper limit of M_Be = 16MSun and q = 0.15, the companion has a mass 2.4MSun. Performing disentangling on mock spectra shows that the spectral signature of a non-degenerate stellar companion with such a low mass cannot be retrieved using our data. Conclusions. Our measurements do not support the presence of a BH companion in MWC 656. The derived upper limit on the mass of the companion rather indicates that it is a neutron star, a white dwarf, or a hot helium star. Far-UV data will help to reject or confirm a hot helium-star companion.
description: 6 pages, 2 + 6 figures, 3 + 1 tables, accepted for publication in A&A
TelePix -- A fast region of interest trigger and timing layer for the EUDET Telescopes
Creators: name: Augustin, Heiko
name: Dittmeier, Sebastian
name: Hammerich, Jan
name: Herkert, Adrian
name: Huth, Lennart
name: Immig, David
name: Perić, Ivan
name: Schöning, André
name: Simancas, Adriana
name: Stanitzki, Marcel
name: Weinläder, Benjamin
Publisher: name: arXiv
Year: 2022
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Test beam facilities are essential to study the response of novel detectors to particles. At the DESY II Test Beam facility, users can test their detectors with an electron beam with a momentum from 1-6 GeV. To track the beam particles, EUDET-style telescopes are provided in each beam area. They provide excellent spatial resolution, but the time resolution is limited by the rolling shutter architecture to a precision of approximately 230 $μ$s. Since the demand on particle rates -- and hence track multiplicities -- is increasing timing is becoming more relevant. DESY foresees several upgrades of the telescopes. TelePix is an upgrade project to provide track timestamping with a precision of better than 5 ns and a configurable region of interest to trigger the telescope readout. Small scale prototypes have been characterised in laboratory and test beam measurements. Laboratory tests with an injection corresponding to 2300 electrons show a S/N of above 20. Test beam characterization shows efficiencies of above 99% over a threshold range of more than 100 mV and time resolutions of 2.4 ns at low noise rates.
description: Preprint submitted to Proceedings of the 15th Pisa Meeting on Advanced Detectors
Synchrotron emitting Komissarov torus around naked singularities
Creators: name: Prada-Méndez, German D.
name: Lora-Clavijo, F. D.
name: Velásquez-Cadavid, J. M.
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: From a theoretical perspective, matter accretion processes around compact objects are highly relevant as they serve as a natural laboratory to test general relativity in the strong field regime. This enables us to validate fundamental concepts such as the no-hair theorem, the cosmic censorship hypothesis, and the existence of alternative solutions to Einstein's equations that mimic the effects of black holes. In this study, we analyze the emission spectra of geometrically thick accretion disks, referred to as Polish doughnuts, around naked singularities described by the $q$-metric. To begin, we revisit the construction of equilibrium configurations of magnetized tori in this spacetime and evaluate the role of the deformation parameter over these configurations. Once we have systematically studied the disks in this spacetime, we use the \texttt{OSIRIS} code to perform a backward ray-tracing method, resulting in the first simulations of the intensity map and emission profiles of magnetized tori within this metric. Furthermore, we validate the effect of both the quadrupole moment and the angular momentum on observable quantities such as flux and intensity for optically thin and thick disks, since for values of $ q < 0$, which correspond to objects with prolate deformation, and which in turn, are constructed with higher values of angular momentum, the emission spectrum exhibits higher intensity than that obtained for Schwarzschild's spacetime. Hence, we find a first differential feature that distinguishes tori formed around naked singularities from those around static black holes.
description: 27 pages, 9 figures. Accepted for publication in Classical and Quantum Gravity
A symplectic Brezis-Ekeland-Nayroles principle
Creators: name: Buliga, Marius
name: de Saxce, Gery
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mathematical Physics (math-ph)
subject: Symplectic Geometry (math.SG)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We propose a modification of the hamiltonian formalism which can be used for dissipative systems. This work continues arXiv:0810.1419 and advances by the introduction of a symplectic version of the Brezis-Ekeland-Nayroles principle [Brezis Ekeland 1976] [Nayroles 1976]. As an application we show how standard plasticity can be treated in our formalism.
An Underwater Archaeological Investigation of Two Potentially Significant Magnetic Anomalies near Cape Canaveral Harbor, Brevard County, Florida
Creators: name: Hall, Wes
Publisher: name: Mid-Atlantic Technology
Year: 1995
Subjects: subject: Florida (State / Territory)
valueUri: https://core.tdar.org/browse/geographic-keyword/2273/florida-state-territory
subject: Cape Canaveral
valueUri: https://core.tdar.org/browse/geographic-keyword/23155/cape-canaveral
subject: Brevard (County)
valueUri: https://core.tdar.org/browse/geographic-keyword/14443/brevard-county
subject: Archaic Period
valueUri: https://core.tdar.org/browse/temporal-keyword/5726/archaic-period
subject: Historic
valueUri: https://core.tdar.org/browse/temporal-keyword/5728/historic
subject: Orange Period
valueUri: https://core.tdar.org/browse/temporal-keyword/8210/orange-period
subject: Prehistoric
valueUri: https://core.tdar.org/browse/temporal-keyword/53/prehistoric
subject: Spanish
valueUri: https://core.tdar.org/browse/culture-keyword/31/spanish
subject: Historic
valueUri: https://core.tdar.org/browse/culture-keyword/25/historic
subject: Euroamerican
valueUri: https://core.tdar.org/browse/culture-keyword/28/euroamerican
subject: Cape 3
valueUri: https://core.tdar.org/browse/site-name/116170/cape-3
subject: Cape 4
valueUri: https://core.tdar.org/browse/site-name/116171/cape-4
subject: Water-Related
valueUri: https://core.tdar.org/browse/site-type/365/water-related
subject: Shipwreck
valueUri: https://core.tdar.org/browse/site-type/367/shipwreck
subject: Cape Canaveral Air Force Station
valueUri: https://core.tdar.org/browse/other-keyword/96049/cape-canaveral-air-force-station
subject: Historic Background Research
valueUri: https://core.tdar.org/browse/investigation-type/18/historic-background-research
subject: Reconnaissance / Survey
valueUri: https://core.tdar.org/browse/investigation-type/7/reconnaissance-survey
subject: Records Search / Inventory Checking
valueUri: https://core.tdar.org/browse/investigation-type/8/records-search-inventory-checking

description: This report presents the results of an archaeological investigation of two magnetic anomalies thought to be associated with submerged cultural resources near Canaveral Harbor, Brevard County, Florida. Of the two anomalies relocated, only one was positively identified as a wreck of a modem, steel fishing trawler. The other anomaly was identified as a large, flat-surfaced steel object approximately 12 feet wide by 35 feet long, lying in the low water surf zone. Because of the object's size, shape, and proximity to the steel hull trawler, investigators believe that the object is a portion. of the trawler's superstructure. Because the wreck and steel object are of modem welded construction and common design, they were not recommended eligible for listing in the National Register of Historical Places. The SHPO concurred.
National Loss and the Politics of Mourning in North Korea
Creators: name: Ballbach, Eric J.
Publisher: name: Asien
Year: 2022

description: The main objective of the paper is to approach the politics of mourning in North Korea following the experiencing of the loss of the country’s two leaders Kim Il Sung and Kim Jong Il. Building on theoretical considerations regarding the concepts of “pastoral power” as well as the “theater state,” the study analyzes some of the performances, symbols, and rituals connected to the loss of the founder of the state and nation Kim Il Sung and of his successor Kim Jong Il. By so doing, the paper provides a fresh perspective for thinking about national loss — and the ways of remembering linked to it — both as inherently political and at the same time as constitutive of social relations. In order to approach the politics of mourning in North Korea, a deeper understanding of the relationship between the individual and the leader(s), as well as of the subsequent process of subjectivation, is required. As such, the study draws on the concept of “the sociopolitical organism” and the notion of “political life and the nontemporality of loss,” as these understandings help explain a set of particular aspects linked to the politics of mourning in the country.
description: Asien, Nr. 154/155 (2020): ASIEN (Januar/April)
A Local Optima Network View of Real Function Fitness Landscapes
Creators: name: Tomassini, Marco
Publisher: name: arXiv
Year: 2022
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: The local optima network model has proved useful in the past in connection with combinatorial optimization problems. Here we examine its extension to the real continuous function domain. Through a sampling process, the model builds a weighted directed graph which captures the function's minima basin structure and its interconnection and which can be easily manipulated with the help of complex networks metrics. We show that the model provides a complementary view of function spaces that is easier to analyze and visualize, especially at higher dimension. In particular, we show that function hardness as represented by algorithm performance, is strongly related to several graph properties of the corresponding local optima network, opening the way for a classification of problem difficulty according to the corresponding graph structure and with possible extensions in the design of better metaheuristic approaches.
description: journal article, 32 pages, 22 figures
Understanding Business Model, Business Strategy, and Their Role for Firm Performance in the Era of Digital Transformation: A Mixed Methods Approach
Creators: name: Mies, Yannick A.
Publisher: name: Universität Osnabrück
Year: 2023
Subjects: subject: Business Model
subject: Digital Transformation
subject: Mixed Methods
subject: Firm Performance
subject: Digitalization
subject: 330 - Wirtschaft

description: Technological change has been a driving force in the competitive game as technology is recognized as a major factor in determining a firm’s market success. As such, firms need to identify effective ways of managing and exploiting newly emerging technology. To explore the unique properties of new digital technology, and its impact for the firm’s capability of value creation, this dissertation investigates extant insights on the established management concepts of business model and business strategy. This dissertation outlines that the concepts of business model and business strategy need to be complemented by an information systems perspective in order to account for the specific characteristics of digital transformation and the requirements of digital technology management. Drawing on business ecosystem theory and contingency theory, this dissertation provides a typology for business model and business strategy for digital technology management and examines the impact of the identified archetypes for firm performance.
ACARIS: Attempting to Improve Conversational AI and Human Social Skills using User Embeddings
Creators: name: Slamka, Simon
Publisher: name: OSF Registries
Year: 2023
Subjects: subject: Physical Sciences and Mathematics
subject: Computer Engineering
subject: Medicine and Health Sciences
subject: Other Mental and Social Health
subject: Communication Sciences and Disorders
subject: Computer Sciences
subject: Mental and Social Health
subject: Artificial Intelligence and Robotics
subject: Engineering

description: In this paper, we propose ACARIS, the Advanced Communication Augmentor and Relational Insights System, a system utilizing a novel method to analyze emotional state, intent, and interest of text communi- cation parties. ACARIS is being built with the goal of improving social skills of humans, while also improving the performance of human-facing AI systems. We go over our initial approach, including the initialization of user embeddings from message features, concatenation of user embeddings with word embeddings, modifications of the DistilBERT architecture, and the training and evaluation processes. We also go over the results of our experiments. Presently, we are not able to achieve any statistically nor practically significant improvement over the current state-of-the-art. How- ever, we actively continue to work on improving our approach by iterating over different architectures, hyperparameters, and user embedding forms. In addition, the work currently only handles sentiment analysis, as other tasks are still in heavy development. As such, the target variable of the model is a sentiment label, and as such, the model is a classifier.
DynED: Dynamic Ensemble Diversification in Data Stream Classification
Creators: name: Abadifard, Soheil
name: Bakhshi, Sepehr
name: Gheibuni, Sanaz
name: Can, Fazli
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: Ensemble methods are commonly used in classification due to their remarkable performance. Achieving high accuracy in a data stream environment is a challenging task considering disruptive changes in the data distribution, also known as concept drift. A greater diversity of ensemble components is known to enhance prediction accuracy in such settings. Despite the diversity of components within an ensemble, not all contribute as expected to its overall performance. This necessitates a method for selecting components that exhibit high performance and diversity. We present a novel ensemble construction and maintenance approach based on MMR (Maximal Marginal Relevance) that dynamically combines the diversity and prediction accuracy of components during the process of structuring an ensemble. The experimental results on both four real and 11 synthetic datasets demonstrate that the proposed approach (DynED) provides a higher average mean accuracy compared to the five state-of-the-art baselines.
description: Proceedings of the 32nd ACM International Conference on Information and Knowledge Management (CIKM '23), October 21--25, 2023, Birmingham, United Kingdom
Mission Control Center - Historic American Engineering Record (HAER)
Creators: name: Slovinac, Trish
Year: 2010
Subjects: subject: Florida (State / Territory)
valueUri: https://core.tdar.org/browse/geographic-keyword/2273/florida-state-territory
subject: Cape Canaveral
valueUri: https://core.tdar.org/browse/geographic-keyword/23155/cape-canaveral
subject: Brevard (County)
valueUri: https://core.tdar.org/browse/geographic-keyword/14443/brevard-county
subject: 8BR02590
valueUri: https://core.tdar.org/browse/site-name/116953/8br02590
subject: Cape Canaveral Air Force Station
valueUri: https://core.tdar.org/browse/other-keyword/96049/cape-canaveral-air-force-station
subject: Architectural Documentation
valueUri: https://core.tdar.org/browse/investigation-type/16/architectural-documentation
subject: Historic Background Research
valueUri: https://core.tdar.org/browse/investigation-type/18/historic-background-research
subject: Architectural Survey
valueUri: https://core.tdar.org/browse/investigation-type/2/architectural-survey
subject: Remote Sensing
valueUri: https://core.tdar.org/browse/investigation-type/22/remote-sensing
subject: Records Search / Inventory Checking
valueUri: https://core.tdar.org/browse/investigation-type/8/records-search-inventory-checking

description: HAER documentation of Mission Control Road located on Cape Canaveral Air Force Station, Florida. This record contains written, graphic, and photographic material as required for mitigation when a significant historic resource is altered or demolished. The Mercury Control Center was considered a contributing resource for its use during Project Mercury, the first U.S. space program, and the first four flights of the Gemini Program. The Mission Control Center housed the flight controllers whose duty was to take over flight control after lift-off and follow it through until splashdown. Additionally, it supported vehicle checkout, spacecraft tracking, and astronaut training.
Non-diffracting and non-attenuating vortex light beams in media with nonlinear absorption of orbital angular momentum
Creators: name: Porras, Miguel A.
name: Ruiz-Jimenez, Carlos
Publisher: name: arXiv
Year: 2014
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We show that a high-order Bessel beam propagating in a medium with nonlinear absorption is not completely absorbed, but survives in the form of a new propagation invariant vortex beam in which the beam energy and orbital angular momentum are permanently transferred to matter and at the same time refueled by spiral inward currents of energy and angular momentum. Unlike vortex solitons and dissipative vortex solitons, these vortex beams are not supported by specific dispersive nonlinearities (self-focusing or self-defocusing) and do not require gain. Propagation invariance in presence of multiple absorption of photons carrying (possibly high) orbital angular momentum makes these beams attractive for optical pumping of angular momentum over long distances.