bluuebunny/crossref_metadata_2025 huggingface dataset:
Calibration of a Bayesian spatio-temporal ETAS model to the June 2000 South Iceland seismic sequence
Authors: Darzi Atefe , Halldorsson Benedikt , Hrafnkelsson Birgir , Ebrahimian Hossein , Jalayer Fatemeh , Vogfjörð Kristín S
Published: October 2022

The reliable forecasting of seismic sequences following a main shock has practical implications because effective post-event response is crucial in earthquake-stricken regions, aftershocks can progressively cause increased damage and compound economic losses. In the South Iceland Seismic Zone (SISZ), one of two large transform zones in Iceland where earthquake hazard is the highest, an intense seismic sequence took place during 17–24 June 2000, starting with a ${M}_{\rm{w}}$ 6.4 main shock on 17 June 2000, followed by another ${M}_{\rm{w}}$ 6.5 main shock four days later and on a different fault. Both earthquakes caused considerable damage and incurred heavy economic losses. They were immediately followed by intense aftershock activity on the causative faults and triggered earthquakes as far as 80 km away along the transform zone. To investigate the feasibility of forecasting the progression of such complex sequences, we calibrated a spatio-temporal epidemic-type aftershock sequence (ETAS) clustering model to the June 2000 seismic sequence in the framework of Bayesian statistics. Short-term seismicity forecasts were carried out for various forecasting intervals and compared with the observations, the first generated a few hours after the first main shock and followed by daily forecasts. The reliability of the early forecasts was seen to depend on the initial model parameters. By using an adaptive parameter inference approach where the posteriors from each preceding forecasting interval served as informative priors for the next, the fast convergence of the parametric values was ensured. As a result, the 16–84 percentile range of the forecasted number of events captured the actual number of observed events in all daily forecasts, and the model exhibited a strong spatial forecasting ability, even only a few hours after the main shock, and over all subsequent daily forecasts. We present the spatio-temporal ETAS parameters for the June 2000 sequence as ideal candidates of prior estimates for future operational earthquake forecasting of other Icelandic aftershock sequences. Past seismic sequences need to be analysed retrospectively to confirm the stability of the parameters of this study, effectively enable the application of the Bayesian ETAS model as an operational earthquake forecasting system for aftershocks in Iceland.
Governance of IoT Data: Why the EU Data Act Will not Fulfill Its Objectives
Authors: Kerber Wolfgang
Published: October 2022

The EU Data Act proposal (DA) seeks to introduce new rights for the users of internet of things (IoT) devices regarding access, use and sharing of the data generated through their use of these devices. This paper presents the results of a first analysis of the effectiveness of this ‘user rights’ mechanism from a ‘law and economics’ perspective. It concludes that the DA will not achieve its objectives of (a) empowering the users of IoT devices (especially the consumers), (b) unlocking large amounts of IoT data for innovation (for IoT-related services and across sectors), and (c) contributing to a fair sharing of the value from the generated IoT data. Although the DA correctly identifies the main problem arising from manufacturers’ technical design of IoT devices, which grants them exclusive de facto control over the generated IoT data, its proposals for solving it are not close to being sufficient: (1) The proposed user rights mechanism suffers from manifold serious problems which will make it weak and largely ineffective (insufficient scope of data; lacking technical interoperability; high transaction costs, especially through the need for a negotiated contract with FRAND conditions; unclarity regarding data markets). (2) Also, the option for users to gain more control over the use of the IoT data, which operates through the requirement that the data holders can only use the IoT data on the basis of a contract with the users, will not work due to unsolved serious market failure problems in B2C situations. Therefore, all the rights to use the IoT data will end up with the data holders (and leave the consumers with only these weak user rights). The main reason for this negative assessment of the DA is its overemphasis on the protection of the exclusive de facto control position of the data holders. However, it is very doubtful whether in the case of IoT devices, whose price can cover the costs of data generation, any general incentive problem for investing in data-generating IoT devices exists. Therefore, a far-reaching rebalancing in favor of easier and increased data sharing and user empowerment is necessary, especially for enabling more innovation in the data economy.
Recreational fishing pressure impacts the density and behaviour of the western rock lobster (Panulirus cygnus, George): evidence from small, no-take marine reserves
Authors: Lindstedt Daniel G , Langlois Tim , Prince Jane , de Lestang Simon
Published: October 2022

It is unknown whether lobster behaviour is sensitive to fishing, as has been previously suggested for fish. This study investigated the impacts of recreational fishing on the wariness of western rock lobster (Panulirus cygnus, George) through comparisons between fished sites and no-take reserves (NTRs) at Rottnest Island. We used visual census to survey the density and size structure of lobster at sites inside and outside three comparable NTRs, and baited remote underwater video to study the behaviour of lobster at comparable sites. The density of legal-sized P. cygnus was twice as high within NTRs (0.34 ± 0.05) than fished sites (0.16 ± 0.03). P. cygnus also spent less time with bait in fished sites (0.42 ± 0.15 min) than NTRs (1.15 ± 0.28 min). This study provides the first evidence that behaviour of decapods, namely P. cygnus, is sensitive to noninjury-related disturbance associated with recreational fishing, with higher wariness in fished areas. Investigation is required into potentially confounding biotic and abiotic factors to further explore the applicability of lobster wariness as an indicator for fishing pressure.
Keeping up hope as an early career climate-impact scientist
Authors: Bryndum-Buchholz Andrea
Published: October 2022

Human-caused climate change is real. A message the scientific community has documented and disseminated for decades. Yet, after equally long inaction by global leadership to address climate change, the world is facing a climate emergency with unprecedented consequences for all aspects of life. As an early career researcher from a generation whose future seems quite dire, I ask myself repeatedly, how can I continue my research without losing hope that science matters, that my research matters? In this Rising tides article, I aim to illustrate my own experience and perspective of keeping up hope to continue doing purposeful research on the background of the ubiquitous social and political challenges we are facing under ongoing climate change. All with the conviction that individual and collective hope needs to be amplified to achieve the climate action, needed for a liveable future.
Coordination of dual-channel supply chains with uncertain demand information
Authors: Liu Yanping , Yan Bo , Chen and Xiaoxu
Published: October 2022

Uncertain demand information increases the difficulty of decision-making in supply chains, especially in the light of inventory costs. This article researches a two-echelon dual-channel fresh agricultural product (FAP) supply chain, and discusses optimal decision-making and the value of information sharing using the Stackelberg game. To eliminate the double marginalization effect between supply chain parties, a two-part linear tariff contract is introduced for coordination. The results show that information sharing is always profitable for the manufacturer, but not for the retailer. The inventory and shortage costs will reduce the manufacturer's optimal pricing and fresh-keeping effort level. When the manufacturer overestimates the market demand predicted by the retailer, asymmetric information will increase the manufacturer’s inventory. The results provide important managerial implications for effective supply chain management.
Convergence of preconditioned Hamiltonian Monte Carlo on Hilbert spaces
Authors: Pidstrigach Jakiw
Published: October 2022

In this article, we consider the preconditioned Hamiltonian Monte Carlo (pHMC) algorithm defined directly on an infinite-dimensional Hilbert space. In this context, and under a condition reminiscent of strong log-concavity of the target measure, we prove convergence bounds for adjusted pHMC in the standard 1-Wasserstein distance. The arguments rely on a synchronous coupling of two copies of pHMC, which is controlled by adapting elements from Bou-Rabee, Eberle and Zimmer (2020).
Gorenstein Matroids
Authors: Lasoń Michał , Michałek Mateusz
Published: October 2022

Matroid base polytope and independence polytope are Cohen–Macaulay. There are plenty of examples when they are also Gorenstein. We provide a full classification of matroids whose independence polytope or base polytope is Gorenstein. This answers to a question raised by Herzog and Hibi.
Engaging Same-Day Peer Ambassadors to Increase Coronavirus Disease 2019 Vaccination Among People Experiencing Unsheltered Homelessness in Los Angeles County: A Hybrid Feasibility-Evaluation Study
Authors: Shover Chelsea L , Rosen Allison , Mata José , Robie Brooke , Alvarado Julissa , Frederes Ashley , Romero Ruby , Beltran Jacqueline , Bratcher Anna , Chang Alicia H , Choi Kristen R , Garcia Candelaria , Shoptaw Steven , Guha Priyanka , Richard Lindsey , Sixx Gunner , Baez Angel , Coleman Anthony , Harvell Sarah , Jackson Shirnae , Lee Caroline , Swan Joanna , Torres Kenny , Kantrim Emily Uyeda , McKeever Maya , Nguyen Anh , Rice Adam , Rosales Marisol , Spoliansky Jordan , Bromley Elizabeth , Behforouz Heidi , Gelberg Lillian , Gorbach Pamina M , Rimoin Anne W , Thomas Emily H
Published: October 2022

Background

This study aimed to evaluate the feasibility and acceptability of engaging unhoused peer ambassadors (PAs) in coronavirus disease 2019 (COVID-19) vaccination efforts to reach people experiencing unsheltered homelessness in Los Angeles County.

Methods

From August to December 2021, vaccinated PAs aged ≥18 years who could provide informed consent were recruited during vaccination events for same-day participation. Events were held at encampments, service providers (eg, housing agencies, food lines, and mobile showers), and roving locations around Los Angeles. PAs were asked to join outreach alongside community health workers and shared their experience getting vaccinated, receiving a $25 gift card for each hour they participated. Postevent surveys evaluated how many PAs enrolled and how long they participated. In October 2021, we added a preliminary effectiveness evaluation of how many additional vaccinations were attributable to PAs. Staff who enrolled the PAs estimated the number of additional people vaccinated because of talking with the PA.

Results

A total of 117 PAs were enrolled at 103 events, participating for an average of 2 hours. At events with the effectiveness evaluation, 197 additional people were vaccinated over 167 PA hours ($21.19 gift card cost per additional person vaccinated), accounting for >25% of all vaccines given at these events.

Discussion

Recruiting same-day unhoused PAs is a feasible, acceptable, and preliminarily effective technique to increase COVID-19 vaccination in unsheltered settings. The findings can inform delivery of other health services for people experiencing homelessness.
The Impact of Supportive Housing on Liver-Related Outcomes Among Persons With Hepatitis C Virus Infection
Authors: Miller-Archie Sara A , Walters Sarah C , Bocour Angelica , Moore Miranda S , Wiewel Ellen , Singh Tejinder , Lim Sungwoo
Published: October 2022

Background

Hepatitis C virus (HCV) infection disproportionately impacts people experiencing homelessness. Hepatitis C virus can lead to negative health outcomes, including mortality. We evaluated the impact of a permanent supportive housing (PSH) program (ie, “treatment”) on liver-related morbidity and mortality among persons with chronic homelessness and HCV infection.

Methods

We matched records for persons eligible for a New York City PSH program (2007–2014) with Heath Department HCV and Vital Statistics registries and Medicaid claims. Among persons diagnosed with HCV before or 2 years posteligibility, we added stabilized inverse probability of treatment weights to negative binomial regression models to compare rates for liver disease-related emergency department visits and hospitalizations, and hazard ratios for mortality, by program placement 2 and 5 years posteligibility.

Results

We identified 1158 of 8783 placed and 1952 of 19 019 unplaced persons with laboratory-confirmed HCV infection. Permanent supportive housing placement was associated with significantly reduced liver-related emergency department visits (adjusted rate ratio [aRR] = 0.76, 95% confidence interval [CI] = .61–.95), hospitalizations (aRR = 0.62, 95% CI = .54–.71), and all-cause (adjusted hazard ratio [aHR] = 0.65, 95% CI = .46–.92) and liver-related mortality (aHR = 0.72, 95% CI = .09–.83) within 2 years. The reduction remained significant for hospitalizations after 5 years.

Conclusions

Placement into PSH was associated with reduced liver-related morbidity and mortality among persons with HCV infection and chronic homelessness.
COVID-19 Vaccination Coverage Among People Experiencing Homelessness in a Highly Vaccinated Midwest County—Dane County, Wisconsin, 2021
Authors: Gibson Crystal , Schumann Casey , Neuschel Kimberly , McBride Joseph A
Published: October 2022

People experiencing homelessness (PEH) are at increased risk for coronavirus disease 2019 (COVID-19) infection. This study assessed COVID-19 vaccination coverage among vaccine-eligible PEH (5 years and older) stratified by demographic characteristics. PEH were less likely to complete a primary vaccination series than the Dane County population (32.0%; 95% confidence interval [CI], 30.3%–33.8% vs 82.4%; 95% CI, 82.3%–82.5%) and were less likely to have received a booster when eligible (30.8%; 95% CI, 27.8%–33.9% vs 67.2%; 95% CI, 67.1%–67.4%). Vaccination rates were lowest among young PEH and PEH of color.
Communicating Effectively With People Experiencing Homelessness to Prevent Infectious Diseases
Authors: Allen Elizabeth M , Smither Betsy , Barranco Lindsey , Reynolds Jennifer , Bursey Kelli , Mattson Kristin , Mosites Emily
Published: October 2022

Background

People experiencing homelessness (PEH) are disproportionately affected by many infectious diseases, including coronavirus disease 2019 (COVID-19). However, communication efforts during public health emergencies like the COVID-19 pandemic often do not consider the unique needs of PEH. We examined how PEH seek and receive health information and how traditional health communication methods resonate with them.

Methods

We conducted in-person focus groups with PEH in 4 jurisdictions (Cincinnati, Ohio; Denver, Colorado; Sacramento, California; and the Bronx, New York) during July 2021.

Results

Findings from 15 focus groups with PEH (n = 53) revealed the need for trusted messengers and consistent messaging across local organizations, as PEH seek to verify information they receive from multiple sources. PEH overwhelmingly preferred to receive health information through face-to-face conversations, especially with healthcare providers with whom they had an established relationship, but they also cited news media, the internet, and social media as their main sources for obtaining health information. PEH reported that effective communication products pair a recommended action with instructions and resources about how to take that action within their community.

Conclusions

These findings support healthcare providers collaborating with public health agencies to ensure that infectious disease prevention messages for PEH are provided by trusted messengers, multimodal, paired with resources, and consistent.
Force Structure and Local Peacekeeping Effectiveness: Micro-Level Evidence on UN Troop Composition
Authors: Dworschak Christoph , Cil Deniz
Published: October 2022

In recent years, researchers have shifted their focus to studying the effects of peacekeeping in a geographically disaggregated manner. One of the factors that is yet to be fully examined is the variation among peacekeeping troops at the local level and its impact on peacekeeping effectiveness. Specifically, peacekeeping troops greatly vary across two dimensions: unit types, e.g., infantry, engineering, aviation, etc., and their country of origin. We argue that mixing different unit types increases peacekeepers’ specialization in skills and equipment, thereby improving their effectiveness. However, this effect is moderated by the diversity of troop contributing countries (TCCs), which exacerbates coordination problems among troops. We explore our mechanisms using evidence from interviews with former and active peacekeepers and test the empirical implications using new subnational data on UN peacekeeping bases. Our results show that diverse unit types from culturally similar TCCs are better at deterring battle-related violence, yet the same conditional effect is not present for deterring one-sided violence. These findings are of major relevance to the ongoing academic debate on peacekeeping composition, as well as to practitioners in international organizations.
Protocol digest of a phase III trial to evaluate the efficacy of preoperative chemotherapy with S-1 plus oxaliplatin followed by D2 gastrectomy with postoperative S-1 in locally advanced gastric cancer: Japan Clinical Oncology Group study JCOG1509 (NAGISA Trial)
Authors: Mizusawa Junki , Tokunaga Masanori , Machida Nozomu , Yabusaki Hiroshi , Kawabata Ryohei , Imamura Hiroshi , Kinoshita Takahiro , Nomura Takashi , Nunobe Souya , Tsuji Kunihiro , Katayama Hiroshi , Fukuda Haruhiko , Boku Narikazu , Yoshikawa Takaki , Terashima Masanori ,   Stomach Cancer Study Group of the Japan Clinical Oncology Group
Published: October 2022

In Japan, postoperative chemotherapy is a standard care for stage II/III gastric cancer after curative resection with D2 lymph node dissection, and the clinical outcomes of patients with stage III gastric cancer are unsatisfactory. A combination of oral S-1 and oxaliplatin, that is the standard chemotherapy regimen for unresectable advanced/recurrent gastric cancer associated with a high response rate, was considered the most promising preoperative chemotherapy regimen. This randomized phase III trial was started in September 2016 to confirm the superiority of preoperative chemotherapy with S-1 plus oxaliplatin followed by D2 gastrectomy with postoperative chemotherapy compared with D2 gastrectomy with postoperative chemotherapy for patients with clinical T3–4N1–3 M0 locally advanced gastric cancer in terms of overall survival. A total of 470 patients will be enrolled from 63 hospitals in Japan for 8.5 years. This trial has been registered in the Japan Registry of Clinical Trials as jRCTs031180350 [https://jrct.niph.go.jp/latest-detail/jRCTs031180350].
Randomized Controlled Trial of a Brief Mindfulness-Based Intervention for Suicidal Ideation Among Veterans
Authors: Herrmann Tracy S , Nazarenko Elena , Marchand William , Day Anna , Merrill Jo , Neil Michael , Thatcher John , Garland Eric , Bryan Craig
Published: October 2022

Introduction

This study was a preliminary evaluation of a manualized, brief mindfulness-based intervention (MB-SI) for veterans with suicidal ideation (SI), admitted into an inpatient psychiatric unit (IPU).

Materials and Methods

A randomized, controlled pilot study of 20 veterans aged 18-70 years with SI, admitted into a psychiatric unit, assigned to treatment as usual (TAU) or MB-SI groups. Outcome data were collected at three time points: preintervention (beginning of first session), postintervention (end of last session), and 1-month postintervention. Primary outcomes were safety and feasibility. Secondary outcome measures were SI and behavior, mindfulness state and trait, cognitive reappraisal, and emotion regulation. Additionally, psychiatric and emergency department admissions were examined. Data analysis included Generalized Linear Models, Wilcoxon Signed-Rank, Mann–Whitney U, and Fisher’s exact tests for secondary outcomes.

Results

Mindfulness-based intervention for suicidal ideation was feasible to implement on an IPU, and there were no associated adverse effects. Mindfulness-based intervention for suicidal ideation participants experienced statistically significant increase in Toronto Mindfulness Scale curiosity scores 1-month postintervention compared to preintervention and greater Toronto Mindfulness Scale decentering scores 1-month postintervention compared to TAU. Emotion Regulation Questionnaire Reappraisal scores significantly increased for the MB-SI group and significantly decreased for TAU over time. IPU and emergency department admissions were not statistically different between groups or over time. Both TAU and MB-SI participants experienced a significant reduction in Columbia-Suicide Severity Rating Scale-SI scores after the intervention. MB-SI participants experienced a higher increase in Five-Facet Mindfulness Questionnaire scores postintervention compared to TAU.

Conclusions

Mindfulness-based intervention for suicidal ideation is feasible and safe to implement among veterans during an inpatient psychiatric admission with SI, as it is not associated with increased SI or adverse effects. Preliminary evidence suggests that MB-SI increases veterans’ propensity to view experiences with curiosity while disengaging from experience without emotional overreaction. Further, more rigorous research is warranted to determine efficacy of MB-SI.

Trial registration

The clinicaltrials.gov registration number is NCT04099173 and dates are July 16, 2019 (initial release) and February 24, 2022 (most recent update).
Forming hot subluminous stars from hierarchical triples – I. The role of an outer tertiary on formation channels
Authors: Preece Holly P , Hamers Adrian S , Battich Tiara , Rajamuthukumar Abinaya Swaruba
Published: October 2022

We present evolutionary pathways for creating hot subdwarf OB (sdOB) stars from hierarchical triple configurations. We use the population synthesis code Multiple Stellar Evolution to follow the stellar, binary, and gravitational dynamical evolution of triple-star systems. To ascertain the effect of the outer tertiary, we also consider the evolution of the inner binary with the tertiary component removed. We find we are able to create sdOB stars in single, binary, and triple configurations. We also demonstrate that it is possible to form sdOBs in systems that undergo triple common envelope evolution, when the tertiary star undergoes unstable mass transfer on to the inner binary. We are unable to create single or wide sdOB systems without involving a merger earlier in the evolution. The triples can produce sdOBs in binaries with wide, non-interacting companions through binary interactions, which is impossible in isolated binaries. Owing to the closeness of the inner binary in hierarchical triples the formation channels associated with stable mass transfer are suppressed when compared to the isolated binary case.
Classification of 3 accreting binaries with VLT/X-Shooter spectra
Authors: Bouchet T , Chaty S , Fortin F , Tomsick J A
Published: October 2022

Since its launch, the INTErnational Gamma-Ray Astrophysics Laboratory (INTEGRAL) satellite has discovered hundreds of X-ray sources, many of which lack proper classification. This mission also led to the discovery of new categories of high mass X-ray binaries (HMXB). We use the spectra of the X-Shooter instrument at the Very Large Telescope (VLT) of the European Southern Observatory (ESO) to better understand the nature of 3 accreting binaries (IGR J10101−5654, IGR J11435−6109, and IGR J12489−6243) discovered by INTEGRAL. We mainly focused on the lines and continuum from the X-Shooter spectra. We used atlases to constrain the nature of the sources and also complemented the spectra with measurements taken by Spitzer and the Wide-field Infrared Survey Explorer (WISE) in infrared, and parallaxes from Gaia for the distances. We determined the nature of each binary system: a BeHMXB system with a companion star of spectral type B0.5 Ve with peculiar carbon emission for IGR J10101−5654 and IGR J11435−6109, and a CV system with an evolved K star (K0IV–K2IV) for IGR J12489−6243. We also estimated some geometrical parameters of the decretion disc and neutron star’s orbit in the case of IGR J11435−6109.
On some features of the solar proton event on 2021 October 28 – GLE73
Authors: Chertok I M
Published: October 2022

In addition to several recent articles devoted to the rare event of ground-level enhancement of the solar relativistic proton flux observed on 2021 October 28 – GLE73, we study the 10–100 MeV solar energetic particle (SEP) component of this event. Based on the Geostationary Operational Environmental Satellite data for 26 GLEs recorded since 1986, we have formed a scatter plot displaying the ratio of the peak fluxes of the $\gt $10 MeV ($J_{10}$) and $\gt $100 MeV ($J_{100}$) protons and their energy spectra. Two extreme characteristics of the prompt component of the SEP–GLE73 event were revealed: (1) very small $J_{10}$ and $J_{100}$ proton fluxes and (2) a very hard energetic spectrum in the 10–100 MeV range. There are only two events with these characteristics similar to SEP–GLE73, namely GLE40 (1989 July 25) and GLE46 (1989 November 15). A correspondence was demonstrated between the hard frequency spectrum of microwave radio bursts of initiating flares and the hard SEP energy spectrum of these two and other GLEs. These results suggest that the flare magnetic reconnection both in the impulsive and post-eruption phases plays an important role in the acceleration of the SEP–GLE protons.
Probable dormant neutron star in a short-period binary system
Authors: Mazeh Tsevi , Faigler Simchon , Bashi Dolev , Shahaf Sahar , Davidson Niv , Green Matthew , Gomel Roy , Maoz Dan , Sussholz Amitay , Dong Subo , Zhang Haotong , Liu Jifeng , Wang Song , Luo Ali , Zheng Zheng , Hallakoun Na’ama , Perdelwitz Volker , Latham David W , Ribas Ignasi , Baroch David , Morales Juan Carlos , Nagel Evangelos , Santos Nuno C , Ciardi David R , Christiansen Jessie L , Lund Michael B , Winn Joshua N
Published: October 2022

We have identified 2XMM J125556.57+565846.4, at a distance of 600 pc, as a binary system consisting of a normal star and a probable dormant neutron star. Optical spectra exhibit a slightly evolved F-type single star, displaying periodic Doppler shifts with a 2.76-d Keplerian circular orbit, with no indication of light from a secondary component. Optical and UV photometry reveal ellipsoidal modulation with half the orbital period, due to the tidal deformation of the F-star. The mass of the unseen companion is constrained to the range of 1.1–$2.1\, \mathrm{M}_{\odot }$ at 3σ confidence, with the median of the mass distribution at $1.4\, \mathrm{M}_{\odot }$, the typical mass of known neutron stars. A main-sequence star cannot masquerade as the dark companion. The distribution of possible companion masses still allows for the possibility of a very massive white dwarf. The companion itself could also be a close pair consisting of a white dwarf and an M star, or two white dwarfs, although the binary evolution that would lead to such a close triple system is unlikely. Similar ambiguities regarding the certain identification of a dormant neutron star are bound to affect most future discoveries of this type of non-interacting system. If the system indeed contains a dormant neutron star, it will become, in the future, a bright X-ray source and afterwards might even host a millisecond pulsar.
Can Gaia find planets around white dwarfs?
Authors: Sanderson Hannah , Bonsor Amy , Mustill Alexander
Published: October 2022

The Gaia spacecraft presents an unprecedented opportunity to reveal the population of long period (a > 1 au) exoplanets orbiting stars across the H–R diagram, including white dwarfs. White dwarf planetary systems have played an important role in the study of planetary compositions, from their unique ability to provide bulk elemental abundances of planetary material in their atmospheres. Yet, very little is known about the population of planets around white dwarfs. This paper predicts the population of planets that Gaia will detect around white dwarfs, evolved from known planets orbiting main-sequence stars. We predict that Gaia will detect 8 ± 2 planets around white dwarfs: $8\pm \, 3{{\ \rm per\ cent}}$ will lie inside 3 au and $40\pm 10\, {{\ \rm per\ cent}}$ will be less massive than Jupiter. As surviving planets likely become dynamically detached from their outer systems, those white dwarfs with Gaia detected planets may not have planetary material in their atmospheres. Comparison between the predicted planet population and that found by Gaia will reveal the importance of dynamical instabilities and scattering of planets after the main-sequence, as well as whether photoevaporation removes the envelopes of gas giants during their giant branch evolution.
The SCUBA-2 Cosmology Legacy Survey: the EGS deep field – III. The evolution of faint submillimetre galaxies atz< 4
Authors: Cardona-Torres L , Aretxaga I , Montaña A , Zavala J A , Faber S M
Published: October 2022

We present a demographic analysis of the physical and morphological properties of $450/850~\mu \rm m$-selected galaxies from the deep observations of the SCUBA-2 Cosmology Legacy Survey in the Extended Groth Strip that are detected below the classical submillimetre-galaxy regime ($S_{850\, \mu \rm m}\lesssim 6~\rm mJy$ beam−1) and compare them with a sample of optically selected star-forming galaxies detected in the Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey in the same field. We derive the evolution of the main sequence of star-forming galaxies, finding a steeper specific star formation rate versus stellar mass at z > 2.5 than previous studies. Most faint submillimetre-galaxies fall within 3σ of the main sequence, but 40 per cent are classified as starbursts. Faint submillimetre galaxies have 50 per cent larger sizes at 2 < z < 3 than optically selected star-forming galaxies of the same mass range. This is also the redshift bin where we find the largest fraction of starbursts, and hence we could be witnessing merging processes, as confirmed by the preference for visual-morphology classifications of these systems as irregular disc galaxies and mergers. Both populations show an increment towards lower redshifts (z < 2) of their concentration in H-band morphology, but faint submillimetre galaxies on average show larger concentration values at later times. These findings support the claim that faint submillimetre galaxies are mostly a population of massive dust-obscured disc-like galaxies that develop larger bulge components at later epochs. While the similarities are great, the median sizes, starburst numbers, and H-band concentration of faint submillimetre galaxies differ from those of optically selected star-forming galaxies of the same stellar mass.
Self-similarity relations for torsional oscillations of neutron stars
Authors: Yakovlev D G
Published: October 2022

Self-similarity relations for torsional oscillation frequencies of neutron star crust are discussed. For any neutron star model, the frequencies of fundamental torsional oscillations (with no nodes of radial wavefunction, i.e. at n = 0, and at all possible angular wave numbers ℓ ≥ 2) is determined by a single constant. Frequencies of ordinary torsional oscillations (at any n > 0 with ℓ ≥ 2) are determined by two constants. These constants are easily calculated through radial integrals over the neutron star crust, giving the simplest method to determine full oscillation spectrum. All constants for a star of fixed mass can be accurately interpolated for stars of various masses (but the same equation of state). In addition, the torsional oscillations can be accurately studied in the flat space–time approximation within the crust. The results can be useful for investigating magneto-elastic oscillations of magnetars which are thought to be observed as quasi-periodic oscillations after flares of soft-gamma repeaters.
The far-ultraviolet continuum slope as a Lyman Continuum escape estimator at high redshift
Authors: Chisholm J , Saldana-Lopez A , Flury S , Schaerer D , Jaskot A , Amorín R , Atek H , Finkelstein S L , Fleming B , Ferguson H , Fernández V , Giavalisco M , Hayes M , Heckman T , Henry A , Ji Z , Marques-Chaves R , Mauerhofer V , McCandliss S , Oey M S , Östlin G , Rutkowski M , Scarlata C , Thuan T , Trebitsch M , Wang B , Worseck G , Xu X
Published: October 2022

Most of the hydrogen in the intergalactic medium (IGM) was rapidly ionized at high redshifts. While observations have established that reionization occurred, observational constraints on the high-redshift ionizing emissivity remain elusive. Here, we present a new analysis of the Low-redshift Lyman Continuum Survey (LzLCS) and literature observations, a combined sample of 89 star-forming galaxies at redshifts near 0.3 with Hubble Space Telescope observations of their ionizing continua (or Lyman Continuum, LyC). We find a strong (6σ significant) inverse correlation between the continuum slope at 1550 Å (defined as F$_\lambda \propto \lambda ^{\beta ^{1550}_{\rm obs}}$) and both the LyC escape fraction (fesc, LyC) and fesc, LyC times the ionizing photon production efficiency (ξion). On average, galaxies with redder continuum slopes have smaller fesc, LyC than galaxies with bluer slopes mainly due to higher dust attenuation. More than 5 per cent (20 per cent) of the LyC emission escapes galaxies with $\beta _{\rm obs}^{1550}$ <−2.1 (−2.6). We find strong correlations between $\beta _{\rm obs}^{1550}$ and the [O iii]/[O ii] flux ratio (at 7.5σ significance), galaxy stellar mass (at 5.9σ), the gas-phase metallicity (at 4.6σ), and the observed far-ultraviolet absolute magnitude (at 3.4σ). Using previous observations of $\beta _{\rm obs}^{1550}$ at high redshift, we estimate the evolution of fesc, LyC with both redshift and galaxy magnitude. The LzLCS observations suggest that fainter and lower mass galaxies dominate the ionizing photon budget at higher redshift, possibly due to their rapidly evolving metal and dust content. Finally, we use our correlation between $\beta _{\rm obs}^{1550}$ and fesc, LyC × ξion to predict the ionizing emissivity of galaxies during the epoch of reionization. Our estimated emissivities match IGM observations, and suggest that star-forming galaxies emit sufficient LyC photons into the IGM to exceed recombinations near redshifts of 7–8.
General Theory of Specific Binding: Insights from a Genetic-Mechano-Chemical Protein Model
Authors: McBride John M , Eckmann Jean-Pierre , Tlusty Tsvi
Published: October 2022

Proteins need to selectively interact with specific targets among a multitude of similar molecules in the cell. However, despite a firm physical understanding of binding interactions, we lack a general theory of how proteins evolve high specificity. Here, we present such a model that combines chemistry, mechanics, and genetics and explains how their interplay governs the evolution of specific protein–ligand interactions. The model shows that there are many routes to achieving molecular discrimination—by varying degrees of flexibility and shape/chemistry complementarity—but the key ingredient is precision. Harder discrimination tasks require more collective and precise coaction of structure, forces, and movements. Proteins can achieve this through correlated mutations extending far from a binding site, which fine-tune the localized interaction with the ligand. Thus, the solution of more complicated tasks is enabled by increasing the protein size, and proteins become more evolvable and robust when they are larger than the bare minimum required for discrimination. The model makes testable, specific predictions about the role of flexibility and shape mismatch in discrimination, and how evolution can independently tune affinity and specificity. Thus, the proposed theory of specific binding addresses the natural question of “why are proteins so big?”. A possible answer is that molecular discrimination is often a hard task best performed by adding more layers to the protein.
Holo-chromodulin: competition between the native Cr3+ and other biogenic cations (Fe3+, Fe2+, Mg2+, and Zn2+) for the binding sites
Authors: Kircheva Nikoleta , Toshev Nikolay , Dudev Todor
Published: October 2022

Chromodulin is an oligopeptide that has an essential role for the flawless functioning of insulin. Although the precise sequence of the constituent amino acid residues and the 3D structure of the molecule has not yet been deciphered, it is known that chromodulin contains only four amino acids in the ratio of Glu–: Gly: Cys: Asp– = 4: 2: 2: 2. An indispensable part for the integrity of the molecule in its active (holo-) form are four chromium cations (hence the name) in the oxidation state of 3+, positioned in two metal binding sites containing one and three Cr3+ ions. Experimental works provide some hints/clues concerning the structure of the metal centers, although their exact composition, type, and arrangement of metal ligating entities remain enigmatic. In the current study, we endeavor to unveil possible structure(s) of the Cr3+ loaded binding sites by strictly following the evidence provided by the experimental data. Well-calibrated in silico methodology for optimization and evaluation of Gibbs free energies is applied and gives strong premises for reliably deciphering the composition/structure of chromodulin metal binding sites. Additional computations reveal the advantage of choosing Cr3+ over other tri- (Fe3+) and divalent (Fe2+, Mg2+, and Zn2+) biogenic ions for securing maximum stability of the metal-occupied binding sites.
Male and Female Sprague Dawley Rats Exhibit Equivalent Natural Reward, Nicotine Self-Administration, Extinction, and Reinstatement During Adolescent-Initiated Behaviors
Authors: Carreño Diana , Lotfipour Shahrdad
Published: October 2022

Introduction

The initiation of nicotine and tobacco use peaks during adolescence. How adolescent males and females differ based on the acquisition of nicotine use and nicotine-seeking behavior is less understood. Our current studies develop a preclinical intravenous self-administration and reinstatement paradigm in male and female Sprague Dawley rats to evaluate how sex impacts the acquisition of nicotine self-administration and nicotine-seeking, when behavior is initiated during adolescence.

Aims and Methods

Male and female adolescent rats were food trained under a fixed-ratio one (FR1) schedule of reinforcement and progressively increased to FR5. Animals were implanted with catheters and began nicotine self-administration (0.015 mg/kg/infusion) at FR5 during adolescence on postnatal day 34. Upon reaching stable reinforced responding, animals were tested for progressive ratio (PR) schedules of reinforcement followed by extinction via the removal of drug and associated cues for a minimum of 5 days or until responding was reduced to ≤25% of baseline. Reinstatement testing began for cue only, nicotine only, and a combination of nicotine plus cues using a Latin square design. Animals returned to extinction conditions for 2 days minimum between testing.

Results

No sex differences were observed for natural rewards, acquisition, and PR schedules of nicotine self-administration, days to extinction, and reinstatement condition.

Conclusions

Our findings provide evidence that sex does not impact natural rewards, nicotine reinforcement, reward, and reinstatement, when behavior is initiated during adolescence. Our study offers a feasible approach for assessing nicotine-seeking in male and female Sprague Dawley rats during the unique developmental window of adolescence.

Implications

This study demonstrates the impact of nicotine and associated cues in the reinstatement of nicotine-seeking in male and female rats when behavior is initiated during adolescence. Findings support the equivalent impact of nicotine and the nonpharmacological stimuli of cues between male and female adolescent rats that began nicotine self-administration during adolescence.
Too hot! Preventing, recognizing and managing heat injury in children
Authors: Hicks Anne , Komar Lindsay
Published: October 2022

Climate change-related extreme heat events leading to public health emergencies are increasing in Canada and expected to affect more regions, more frequently and for longer time periods. Children, city dwellers and marginalized populations are amongst the most vulnerable to morbidity and mortality related to extreme heat. Paediatricians can provide caregivers and families with advice to minimize risks as well as advocate for safer city planning and harm mitigation strategies.
Daniel Defoe on Naturalization
Authors: Mierowsky Marc
Published: October 2022

This essay explores the connection in Daniel Defoe’s writing between naturalization as a civic concept and naturalization as an epistemological or literary-critical process. For Defoe, the incorporation of new subjects was a moral project that entailed the literary interpellation of a more productive, tolerant and empowered populace. A history of his efforts to encourage immigration by broadening access to legal citizenship provides, then, not just crucial insight into his view of the national political community but points to the role his satire, journalism and novels might play in bringing subjects together in its formation. In pursuit of this history, I trace Defoe’s approach to naturalization to The True-born Englishman (1700), the poem that established his reputation as an advocate for immigration reform. I then track Defoe’s activism in favour of The Foreign Protestants Naturalization Act (7 Anne c. 5) before its passage in March 1709 and after its repeal in 1711 (10 Anne c. 9), as debate turned to the fate of successive alien populations: Huguenot and Palatine refugees and England’s Jews. These debates provide an important new context for Defoe’s final novel, The Fortunate Mistress [Roxana] (1724). Attention to the ways Defoe deployed poetry and prose fiction during them reveals how questions of admission and assimilation underpinned his polemical strategy as a popular author and signalled the importance of his work to the history of modern citizenship.
COMPARISON OF GAMMA ABSORBED DOSE RATES IN THE AIR MEASURED WITH A PORTABLE SURVEY METER AND THE SOIL RADIOACTIVITY MEASUREMENTS
Authors: Lee Hae Young , Maeng Seongjin , Park Seong Jin , Lee Sang Hoon
Published: October 2022

To compare the measurement results of a portable survey meter with a soil-based dose rate assessment method, the gamma absorbed dose rates in the air were measured at 27 sites. The soil-based gamma absorbed dose rates in the air were calculated using established conversion factors and the activity concentrations of 226Ra, 232Th and 40K of the soil at the sites. The gamma absorbed dose rate averages of the portable survey meter, and computing from the activity concentrations in the soil were 65.8 ± 4.26 and 64.8 ± 3.68 nGy⋅h−1, respectively. A significant positive correlation was found in the comparison between the evaluated gamma absorbed dose rates from soil radioactivity and in the air. Conversion factors based on the local soils converting to the absorbed dose rate were computed from the portable survey meter data and the soil activity concentrations, and it was compared with others.
“Bring Your Straight Friends”: Anti-Gay Religious Stigma and Black and White LGB-Affirming Church Members
Authors: Lee Austin Colby Guy
Published: October 2022

This comparative study of Black and white members of LGB-affirming churches finds that race plays a major role in shaping the socio-temporal contexts in which American Protestants come to understand anti-gay religious stigma and make meaning of their affiliation to LGB-affirming churches. Through interviews with 13 Black and 14 white members of churches that actively describe themselves as affirming and inclusive of LGB people, I find that Black church members made efforts to distinguish their churches from “gay churches” and that LGB inclusion functions as a potential source of stigma for Black-affirming church members. Conversely, white respondents articulated a valuing of LGB inclusion tied to broader conceptions of inclusion and social progress. These findings suggest that Black and white Protestants encounter distinct cultural landscapes when evaluating the legitimacy and status of their religious institutions and that Black LGB-affirming church members internalize stigma related to their religious affiliations.
Mucilaginibacter rivuli sp. nov., isolated from a water rivulet
Authors: Bae Seokhyeon , Kang Heeyoung , Kim Haneul , Joh Kiseong
Published: October 2022

Strain HMF5004T was isolated from a rivulet located in Yongin, Republic of Korea. Phylogenetic analyses based on 16S rRNA gene sequences showed that strain HMF5004T belonged to the genus

Mucilaginibacter

. Strain HMF5004T was closely related to

Mucilaginibacter paludis

(97.7%) and

Mucilaginibacter gracilis

(97.2%). The values of average nucleotide identity and digital DNA–DNA hybridization between strain HMF5004T and

M. paludis

were 72.8 and 19.2 %, respectively. Cells of strain HMF5004T were Gram-stain-negative, rod-shaped, non-motile, catalase-positive and oxidase-positive. The DNA G+C content of strain HMF5004T was 42.4 mol%. Strain HMF5004T had menaquinone-7 as a major quinone. The major cellular fatty acids included iso-C15 : 0, summed feature 3 (C16 : 1
 ω7c and/or C16 : 1
 ω6c) and anteiso-C15 : 0. The polar lipids of strain HMF5004T contained phosphatidylethanolamine, five unidentified aminolipids, one unidentified aminophospholipid and four unidentified polar lipids. On the basis of the evidence presented in this polyphasic taxonomic study, strain HMF5004T is considered to represent a novel species for which the name Mucilaginibacter rivuli sp. nov. is proposed. The type strain is HMF5004T (=KCTC 82633T=NBRC 115091T).