bluuebunny/crossref_metadata_2025_split huggingface dataset:
Basic considerations on seasonal breeding in mammals including their testing by comparing natural habitats and zoos
Authors: Clauss Marcus , Zerbe Philipp , Bingaman Lackey Laurie , Codron Daryl , Müller Dennis W. H. 
Published: October 2020

AbstractSeasonal reproduction is common in mammals. Whereas specific conditions triggering a seasonal response can only be identified in controlled experiments, large-scale comparisons of reproduction in natural habitats and zoos can advance knowledge for taxa unavailable for experimentation. We outline how such a comparison can identify species whose seasonal physiology is linked to photoperiodic triggers, and those whose perceived seasonality in the wild is the consequence of fluctuating resources without a photoperiodic trigger. This concept groups species into those that do not change their aseasonal pattern between natural habitats and zoos because they are not constrained by resources in the wild, those that do not change a seasonal pattern between natural habitats and zoos because they are triggered by photoperiod irrespective of resources, and those that change from a more seasonal pattern in the natural habitat to an aseasonal pattern in zoos because the zoo environment alleviates resource limitations experienced in the wild. We explain how detailed comparisons of mating season timing in both environments can provide clues whether a specific daylength or a specific number of days after an equinox or solstice is the likely phototrigger for a taxon. We outline relationships between life history strategies and seasonality, with special focus on relative shortening of gestation periods in more seasonal mammals. Irrespective of whether such shortening results from the adaptive value of fitting a reproductive cycle within one seasonal cycle (minimizing ‘lost opportunity’), or from benefits deriving from separating birth and mating (to optimize resource use, or to reduce infanticide), reproductive seasonality may emerge as a relevant driver of life history acceleration. Comparisons of data from natural habitats and zoos will facilitate testing some of the resulting hypotheses.
Identifying causes of delay in interfacility transfer of patients by air ambulance
Authors: Wong Alanna , McParland Aidan , Nolan Brodie 
Published: October 2020

ABSTRACTObjectivesPopulation density can limit the level of care that can be provided in local facilities in Ontario, and as such, patients with severe illnesses often require interfacility transfers to access specialized care. This study aimed to identify causes of delay in interfacility transport by air ambulance in Ontario.MethodsCauses of delay were identified by manual review of electronic patient care records (ePCRs). All emergent interfacility transfers conducted by Ornge, the sole provider of air-based medical transport in Ontario, between January 1, 2016 and December 31, 2016 were included. The ePCRs were reviewed if they met one or more of the following: (1) contained a standardized delay code; (2) contained free text including “delay”, “wait”, or “duty-out”; (3) were above the 75th percentile in total transport time; or (4) were above the 90th percentile in time to bedside, time at the sending hospital, or time to receiving facility.ResultsOur search strategy identified 1,220 ePCRs for manual review, which identified a total of 872 delays. Common delays cited included aircraft refueling (234 delays), waiting for land emergency medical service (EMS) escort (146), and staffing- or dispatch-related issues (124). Other delays included weather/environmental hazards (43); mechanical issues (36); and procedures, imaging, or stabilization (80).ConclusionsSome common causes of interfacility delay are potentially modifiable: better trip planning around refueling and improved coordination with local EMS, could reduce delays experienced during interfacility trips. To better understand causes of delay, we would benefit from improved documentation and record availability which limited the results in this study.
Individual and team competencies in translational teams
Authors: Lotrecchiano Gaetano R. , DiazGranados Deborah , Sprecher Jennifer , McCormack Wayne T. , Ranwala Damayanthi , Wooten Kevin , Lackland Daniel , Billings Heather , Brasier Allan R. 
Published: October 2020

AbstractTranslational scientists create, advance, and translate knowledge as a result of research, learning, and application. Translational teams are composed of dynamic and diverse interprofessional and cross-disciplinary members that generate new knowledge to address a shared translational objective. The objective involves advancing an interventional product, behavioral intervention, or evidence-based approach to improve human health. This paper focuses on identifying individual and team competencies using a modified Delphi method to reach a consensus on the competencies needed by translational teams (TTs).
Environmental contamination in a coronavirus disease 2019 (COVID-19) intensive care unit—What is the risk?
Authors: Ong Sean Wei Xiang , Lee Pei Hua , Tan Yian Kim , Ling Li Min , Ho Benjamin Choon Heng , Ng Ching Ging , Wang Dong Ling , Tan Boon Huan , Leo Yee-Sin , Ng Oon-Tek , Wong Michelle Su Yen , Marimuthu Kalisvar 
Published: October 2020

AbstractBackground:The risk of environmental contamination by severe acute respiratory coronavirus virus 2 (SARS-CoV-2) in the intensive care unit (ICU) is unclear. We evaluated the extent of environmental contamination in the ICU and correlated this with patient and disease factors, including the impact of different ventilatory modalities.Methods:In this observational study, surface environmental samples collected from ICU patient rooms and common areas were tested for SARS-CoV-2 by polymerase chain reaction (PCR). Select samples from the common area were tested by cell culture. Clinical data were collected and correlated to the presence of environmental contamination. Results were compared to historical data from a previous study in general wards.Results:In total, 200 samples from 20 patient rooms and 75 samples from common areas and the staff pantry were tested. The results showed that 14 rooms had at least 1 site contaminated, with an overall contamination rate of 14% (28 of 200 samples). Environmental contamination was not associated with day of illness, ventilatory mode, aerosol-generating procedures, or viral load. The frequency of environmental contamination was lower in the ICU than in general ward rooms. Eight samples from the common area were positive, though all were negative on cell culture.Conclusion:Environmental contamination in the ICU was lower than in the general wards. The use of mechanical ventilation or high-flow nasal oxygen was not associated with greater surface contamination, supporting their use and safety from an infection control perspective. Transmission risk via environmental surfaces in the ICUs is likely to be low. Nonetheless, infection control practices should be strictly reinforced, and transmission risk via droplet or airborne spread remains.
CHRONOLOGY OF THE BURIAL ACTIVITY OF THE LAST HUNTER-GATHERERS IN THE SOUTHWESTERN IBERIAN PENINSULA, PORTUGAL
Authors: Peyroteo-Stjerna R 
Published: October 2020

ABSTRACTFor most of human history, funerary burial has been unusual. Archaeology shows a shift in funerary practices in postglacial hunter-gatherers, in parts of Europe during the Late Mesolithic. This is documented by the burial grounds in the Tagus and Sado valleys in the southwestern Iberian Peninsula, Portugal, where ca. 376 burials were excavated. This study presents a chronology for the burial activity in these sites and contextualizes the start and end activity phases within regional environmental changes and cultural developments. The dataset consists of 76 14C dates on human bone (19 new, 57 published) including new dates from contexts in Portugal outside these valleys. Bayesian chronological models were defined in OxCal, and protein carbon contributions of marine foods were estimated by the Bayesian mixing model FRUITS. The results indicate a broader timeframe for the Late Mesolithic in Portugal, than previously suggested, starting during a period of significant environmental changes, ca. 8500–8300 cal BP, and ending ca. 7000 cal BP. The burial activity decreased during the establishment of Neolithic farmers in southwestern Iberia from ca. 7450 cal BP, however, these burial grounds continued to be used by Mesolithic hunter-gatherers, showing that diverse social structures and worldviews coexisted for several generations.
Governmentality and Translation: Re-thinking the Cultural Politics of Lineage Landscapes in Contemporary Rural China
Authors: Chen Ningning 
Published: October 2020

AbstractThis paper explores the cultural politics of lineage landscapes in contemporary rural China. Drawing on a combined governmentality/translation approach and ethnographic fieldwork in rural Wenzhou, it examines how the state governs the production of lineage landscapes and how local lineages translate governmental technologies in complex ways. Empirical evidence reveals that the government develops diversified rationalities and modes of governance to direct the (re)construction of lineage landscapes. It is also found that local lineages are skilled at appropriating state discourses and practices as well as enrolling other (non-)human actors, thereby legitimizing their landscape projects of ancestral tombs and memorials. On the ground, they often displace state objectives with the production of their preferred landscape (for example, “chair” tombs). Respectful of ancestors, state agents sometimes turn a blind eye to local displacement; however, while encountering challenges from the higher-level government, they intensify regulation, but lineages still retain the capacity to negotiate with them. With sensitivity to the entanglement of diversified actors and their dynamic interactions, this paper underlines the multiplicity and contingency of state governance and societal responses. It also foregrounds the cultural politics of lineage landscapes as a process of translating governmental technologies characterized by continuous mobilization, displacement and negotiation in a heterogeneous network.
The concept of ‘palimpsest’ in a reconceptualization of biodiversity conservation
Authors: Rivera-Núñez Tlacaelel , Fargher Lane 
Published: October 2020

SummaryThe concept of the Anthropocene has highlighted the significant global impact of human activities on ecological systems on a geological scale (Crutzen 2002). This concept has come to significantly influence a scientific and political agenda orientated towards documenting and denouncing multiple negative anthropogenic factors that have led to global change. Nevertheless, not all large-scale environmental transformations by human societies have been intrinsically destructive. Many indigenous communities in the Neotropics, Palearctic, sub-Saharan Africa, North America, Indo-Malaya and Australasia have radically – albeit often constructively – modified the physical and biotic conditions of the ecological systems that they inhabit (Ellis 2015). It is necessary to revise the assumption that human actions always degrade the environment, through a reconceptualization that we have previously called ‘anthropogenesis’ (Rivera-Núñez et al. 2020). Instead of the naïve portrayal of the ‘good Anthropocene’ (Hamilton 2015, Fremaux & Barry 2019), anthropogenesis seeks to enrich the biodiversity debate with the historical human expressions of constructed environments that the conservation-focused ‘Edenic sciences’ and the ‘pristine syndrome’ (Robbins & Moore 2013) tend to ignore, or ‘Anthropo-not-see’ (de la Cadena 2019). The objective of this comment paper is to urge the academic community, grassroots organizations and governments to employ a concept of ‘palimpsest’ (from the Ancient Greek for ‘again scraped’, implying that something is scraped clear ready to be used again) in the reconceptualization of biodiversity conservation from a historical perspective that implements research and policy agendas that incorporate the human propensity for environmental construction in a deeper and more inclusive manner.
Does reduced cardiopulmonary exercise testing performance predict poorer quality of life in adult patients with Fontan physiology?
Authors: Suter Blair , Kay William A. , Kuhlenhoelter Alisha M. , Ebenroth Eric S. 
Published: October 2020

AbstractBackground:Cardiopulmonary exercise testing performance has been shown to be a predictor of morbidity, mortality, and quality of life in patients with Fontan physiology; however, the role of exercise performance along with other diagnostics is not fully understood. We evaluated the hypothesis that reduced exercise performance correlates with poorer quality of life in Fontan patients as they continue to age.Methods:Chart review was performed on patients 12 years and older with Fontan who had completed cardiopulmonary exercise testing and age-appropriate quality of life surveys. Quality of life outcomes were analysed against exercise performance and other descriptive data.Results:For the younger cohort (n = 22), exercise performance predicted quality of life with different measures across domains and had a stronger correlation than echocardiographic parameters. For the older cohort (n = 34), exercise performance did not predict quality of life.Conclusions:Objective exercise performance was a useful marker for general, physical, emotional, social, and school quality of life in a younger cohort but less helpful in older adults. This is perhaps due to older patients accommodating to their conditions over time. The role of exercise performance and objective data in predicting quality of life in patients with Fontan physiology is incompletely understood and additional prospective evaluation should be undertaken.
Assessment of Prorated Scoring of an Abbreviated Protocol for the National Institutes of Health Toolbox Cognition Battery
Authors: Rebchuk Alexander D. , Alimohammadi Arshia , Yuan Michelle , Cairncross Molly , Torres Ivan J. , Silverberg Noah D. , Field Thalia S. 
Published: October 2020

AbstractObjective:To evaluate an abbreviated NIH Toolbox Cognition Battery (NIHTB-CB) protocol that can be administered remotely without any in-person assessments, and explore the agreement between prorated scores from the abbreviated protocol and standard scores from the full protocol.Methods:Participant-level age-corrected NIHTB-CB data were extracted from six studies in individuals with a history of stroke, mild traumatic brain injury (mTBI), treatment-resistant psychosis, and healthy controls, with testing administered under standard conditions. Prorated fluid and total cognition scores were estimated using regression equations that excluded the three fluid cognition NIHTB-CB instruments which cannot be administered remotely. Paired t tests and intraclass correlations (ICCs) were used to compare the standard and prorated scores.Results:Data were available for 245 participants. For fluid cognition, overall prorated scores were higher than standard scores (mean difference = +4.5, SD = 14.3; p < 0.001; ICC = 0.86). For total cognition, overall prorated scores were higher than standard scores (mean difference = +2.7, SD = 8.3; p < 0.001; ICC = 0.88). These differences were significant in the stroke and mTBI groups, but not in the healthy control or psychosis groups.Conclusions:Prorated scores from an abbreviated NIHTB-CB protocol are not a valid replacement for the scores from the standard protocol. Alternative approaches to administering the full protocol, or corrections to scoring of the abbreviated protocol, require further study and validation.
Vivaldi antennas: a historical review and current state of art
Authors: Bhattacharjee Anindita , Bhawal Abhirup , Karmakar Anirban , Saha Anuradha , Bhattacharya Diptendu 
Published: October 2020

AbstractThe progressions in the field of wireless technology can be highly attributed to the development of antennas, which can access high data rates, provide significant gain and uniform radiation characteristics. One such antenna called the Vivaldi antenna has attracted the utmost attention of the researchers owing to its high gain, wide bandwidth, low cross-polarization, and stable radiation characteristics. Over the years, different procedures have been proposed by several researchers to improve the performance of the Vivaldi antennas. Some of these different approaches are feeding mechanisms, integration of slots, dielectric substrate selection, and radiator shape. Correspondingly, the performance of a Vivaldi antenna can be increased by including dielectric lens, parasitic patch in between two radiators, corrugations, as well as metamaterials. This paper gives a systematic identification, location, and analysis of a large number of performance enhancement methods of Vivaldi antenna design depicting their concepts, advantages, drawbacks, and applications. The principal emphasis of this article is to offer an outline of the developments in the design of Vivaldi antennas over the last few years, where the most important offerings, mostly from IEEE publications, have been emphasized. This review work aims to reveal a promising path to antenna researchers for its advancement using Vivaldi antennas.
Swell Modulation on Wind Stress in the Constant Flux Layer
Authors: Chen Sheng , Qiao Fangli , Zhang Jun A. , Ma Hongyu , Xue Yuhuan , Chen Siyu 
Published: October 2020

AbstractThe impact of swell on wind stress is investigated through direct three‐layer flux measurements taken by a fixed tower in the marine atmospheric boundary layer. Observations confirm that the assumption of constant momentum flux layer is valid under swell‐dominated conditions around the reference height of 10 m. The swell can modulate the total wind stress to be less than the turbulent stress derived from the first‐order closure method, and the extent of this modulation decreases with height. The critical layer that represents the top of the layer affected by stronger swells is estimated to reach 45‐m altitude, and the depth of this layer decreases as the swells weaken and the wind speed increases. Furthermore, a simple swell correction scheme for the total stress calculation is developed, showing good performance against observations.
A Hybrid Dynamical‐Statistical Model for Advancing Subseasonal Tropical Cyclone Prediction Over the Western North Pacific
Authors: Qian Yitian , Hsu Pang‐Chi , Murakami Hiroyuki , Xiang Baoqiang , You Lijun 
Published: October 2020

AbstractTropical cyclone (TC) genesis prediction at the extended‐range to subseasonal timescale (a week to several weeks) is a gap between weather and climate predictions. The current dynamical prediction systems and statistical models show limited skills in TC genesis forecasting at the lead time of 1–3 weeks. A hybrid dynamical‐statistical model is developed that reveals capability in predicting basin‐wide TC frequency in every 10‐day period over the western North Pacific at a 25‐day forecast lead, which is superior to the statistical and dynamical model‐based predictions examined in this study. In this hybrid model, the cyclogenesis counts for different TC clusters are predicted, respectively, using the statistical models in which the large‐scale predictors associated with intraseasonal oscillation evolutions are provided by a dynamical model. A probabilistic map of TC tracks at the subseasonal timescale is further predicted by incorporating the climatological probability of track distributions of these TC clusters.
Dependence of Atmospheric Transport Into the Arctic on the Meridional Extent of the Hadley Cell
Authors: Yang Huang , Waugh Darryn W. , Orbe Clara , Chen Gang 
Published: October 2020

AbstractRecent studies have shown a large spread in the transport of atmospheric tracers into the Arctic among a suite of chemistry climate models and have suggested that this is related to the spread in the meridional extent of the Hadley Cell (HC). Here we examine the HC‐transport relationship using an idealized model, where we vary the mean circulation and isolate its impact on transport to the Arctic. It is shown that the poleward transport depends on the relative position between the northern edge of the HC and the tracer source, with maximum transport occurring when the HC edge lies near the middle of the source region. Such dependence highlights the critical role of near‐surface transport by the Eulerian mean circulation rather than eddy mixing in the free troposphere and suggests that variations in the HC edge and the tracer source region are both important for modeling Arctic composition.
Measured Constraints on Cloud Top Entrainment to Reduce Uncertainty of Nonprecipitating Stratocumulus Shortwave Radiative Forcing in the Southern Ocean
Authors: Sanchez K. J. , Roberts G. C. , Diao M. , Russell L. M. 
Published: October 2020

AbstractStratocumulus cloud top entrainment has a significant effect on cloud properties, but there are few observations quantifying its impact. Using explicit 0‐D parcel model simulations, initialized with below‐cloud in situ measurements, and validated with in situ measurements of cloud properties, the shortwave cloud radiative forcing (SWCF) was reduced by up to 100 W m−2 by cloud top entrainment in the Southern Ocean. The impact of entrainment‐corrected SWCF is between 2 and 20 times that of changes in the aerosol particle concentration or updraft at cloud base. The variability in entrainment‐corrected SWCF accounts for up to 50 W m−2 uncertainty in estimating cloud forcing. Measurements necessary for estimating the impact of entrainment on cloud properties can be constrained from existing airborne platforms and provide a first‐order approximation for cloud radiative properties of nonprecipitating stratocumulus clouds. These measurement‐derived estimates of entrainment can be used to validate and improve parameterizations of entrainment in Global Climate Models.
Mapping Sea Ice Surface Topography in High Fidelity With ICESat‐2
Authors: Farrell S. L. , Duncan K. , Buckley E. M. , Richter‐Menge J. , Li R. 
Published: October 2020

AbstractThe Advanced Topographic Laser Altimeter System on Ice, Cloud and land Elevation Satellite 2 (ICESat‐2) offers a new remote sensing capability to measure complex sea ice surface topography. We demonstrate the retrieval of six sea ice parameters from ICESat‐2/Advanced Topographic Laser Altimeter System data: surface roughness, ridge height, ridge frequency, melt pond depth, floe size distribution, and lead frequency. Our results establish that these properties can be observed in high fidelity, across broad geographic regions and ice conditions. We resolve features as narrow as 7 m and achieve a vertical height precision of 0.01 m, representing a significant advance in resolution over previous satellite altimeters. ICESat‐2 employs a year‐round observation strategy spanning all seasons, across both the Arctic and Southern Oceans. Because of its higher resolution, coupled with the spatial and temporal extent of data acquisition, ICESat‐2 observations may be used to investigate time‐varying, dynamic, and thermodynamic sea ice processes.