bluuebunny/crossref_metadata_2025_split huggingface dataset:
Some generalizations of ascent and descent for linear operators
Authors: Garbouj Zied 
Published: June 2021

AbstractThe purpose of this paper is to present in linear spaces some results for new notions called A-left (resp., A-right) ascent and A-left (resp., A-right) descent of linear operators (where A is a given operator) which generalize two important notions in operator theory: ascent and descent. Moreover, if A is a positive operator, we obtain several properties of ascent and descent of an operator in semi-Hilbertian spaces. Some basic properties and many results related to the ascent and descent for a linear operator on a linear space Kaashoek (Math Ann 172:105–115, 1967), Taylor (Math Ann 163:18–49, 1966) are extended to these notions. Some stability results under perturbations by compact operators and operators having some finite rank power are also given for these notions.
Measuring What Matters for Children: A Systematic Review of Frequently Used Pediatric Generic PRO Instruments
Authors: Arsiwala Tasneem , Afroz Nuzhat , Kordy Kattayoun , Naujoks Christel , Patalano Francesco 
Published: June 2021

AbstractObjectiveTo provide an assessment of the quality of the most frequently used self-reported, generic patient-reported outcome measures (PROMs) that measure health-related quality of life (HRQoL) in children against the good research practices recommended by ISPOR task force for the pediatric population.MethodLiterature search was conducted on OvidSP database to identify the generic pediatric PROMs used in published clinical studies. The quality of PROMs used in more than ten clinical studies were descriptively evaluated against the ISPOR task force’s good research practices.ResultsSix PROMs were evaluated, namely Pediatric Quality-of-Life inventory 4.0 (PedsQL), Child Health Questionnaire (CHQ), KIDSCREEN, KINDL, DISABKIDS and Child Health and Illness Profile (CHIP). All PROMs, except KIDSCREEN, had versions for different age ranges. Domains of physical, social, emotional health and school activities were common across all the instruments, while domains of family activities, parent relations, independence, and self-esteem were not present in all. Children’s input was sought during the development process of PROMs. Likert scales were used in all the instruments, supplemented with faces (smileys) in instruments for children under 8 years. KIDSCREEN and DISABKIDS were developed in a European collaboration project considering the cross-cultural impact during development.ConclusionThe comparison of the instruments highlights differences in the versions for different pediatric age groups. None of the PROMs fulfill all the good research practices recommended by the ISPOR task force. Further research is needed to define which age-appropriate domains are important for older children and adolescents.
Reading over and under the waves: A study of ocean picture books for children
Authors: Francis Prue F. , Venzo Paul , Bellgrove Alecia 
Published: June 2021

AbstractMarine science picture books have the capacity to shape what young people know and how they think about ocean environments and marine biodiversity. Despite academic scholarship on marine science literacy broadly, relatively little has been done to study the role of picture books in teaching children about this topic. This paper is an attempt to fill that gap, by analysing 100 ocean-themed books against common marine science concepts and the Australian Science Understanding Curriculum streams. A majority of the 100 books analysed were found to link with marine science and the Australian Science Understanding Curriculum (81% and 91%, respectively) where biological concepts were dominant in both cases. Chemical and physical sciences were underrepresented in the 100 books analysed. The study provides examples of books that can be used for teaching marine education in primary schools in Australia and suggest further inquiry into marine science literature for children.
The Ahl-e-Hadith: From British India to Britain
Authors: AMIN HIRA , MAJOTHI AZHAR 
Published: June 2021

AbstractStudies on Salafism tend to put the spotlight on the Middle East, rendering all other movements as secondary offshoots. In the British context, research typically focuses on British Salafi groups and their close relationship with Arab Salafis; it usually locates the origins of the British Salafi movement in the 1980s with the rise of cohorts among second-generation Muslims and converts to Islam, with fleeting remarks on the South Asian Ahl-e-Hadith who migrated to Britain from the 1960s onwards. This article recentres the South Asian Ahl-e-Hadith movement within the narrative of British Salafism. Tracing its trajectory from its origins in British India to Britain, this article argues that in the 1970s the Ahl-e-Hadith played a significant role in laying the foundations for British Salafism. Furthermore, far from being eclipsed by newer cohorts, it highlights the hitherto continuous presence of the Ahl-e-Hadith in the British Muslim landscape and emphasizes its overlapping, yet distinct, position in relation to the spectrum of Arab-inspired British Salafism.
Integrating habitat suitability modelling and assessment of the conservation gaps of nature reserves for the threatened Reeves’s Pheasant
Authors: TIAN SHAN , LU SHUAI , HUA JUNQIN , CHANG JIANG , LI JIANQIANG , ZHANG ZHENGWANG , WANG YONG , XU JILIANG , ZHANG MINGXIANG 
Published: June 2021

SummaryAs threats to biodiversity proliferate, establishment and expansion of protected areas have increasingly been advocated in recent decades. In establishing a network of protected areas, recurrent assessments of the biodiversity conservation actually afforded by these areas is required. Gap analysis has been useful to evaluate the sufficiency and performance of protected areas. We surveyed Reeves’s PheasantSyrmaticus reevesiipopulations in 2018–2019 across its distribution range in central China to quantify the distribution of habitat suitable for this species. Our goal was to ascertain the current distribution of Reeves’s Pheasant and then identify the gaps in protecting Reeves’s Pheasant of the existing national nature reserve (NNR) network to provide suggestions for improving the conservation of this important species. The existing NNR network encompassed only 17.0% of the habitat suitable for Reeves’s Pheasant. Based on the current distributions of both suitable habitat and NNRs for Reeves’s Pheasant, we suggest most currently unprotected areas comprised moderately suitable habitat for species and should be prioritized in the future. A multiple species approach using Reeves’s Pheasant as a flagship species should be considered to understand the extent of mismatch between the distributions of protected areas and suitable habitat to improve the management effectiveness of NNRs. This case study provides an example of how the development of a conservation reserve network may be based on species distribution and habitat assessments and is useful to conservation efforts in other regions and for other species.
A Decade of Terrorism in the United States and the Emergence of Counter-Terrorism Medicine
Authors: Tin Derrick , Hart Alexander , Ciottone Gregory R. 
Published: June 2021

Abstract

Background:
The United States (US) is ranked 22nd on the Global Terrorism Index (2019), a scoring system of terrorist activities. While the global number of deaths from terrorism over the past five years is down, the number of countries affected by terrorism is growing and the health care repercussions remain significant. Counter-Terrorism Medicine (CTM) is rapidly emerging as a necessary sub-specialty, and this study aims to provide the epidemiological context over the past decade supporting this need by detailing the unique injury types responders are likely to encounter and setting the stage for the development of training programs utilizing these data.

Methods:
The Global Terrorism Database (GTD) was searched for all attacks in the US from 2008-2018. Attacks met inclusion criteria if they fulfilled the three terrorism-related criteria as set by the GTD. Ambiguous events were excluded when there was uncertainty as to whether the incident met all of the criteria for inclusion in the GTD. The grey literature was reviewed, and each event was cross-matched with reputable international and national newspaper sources online to confirm or add details regarding weapon type used and, whenever available, details of victim and perpetrator fatalities and injuries.

Results:
In total, 304 events were recorded during the period of study. Of the 304 events, 117 (38.5%) used incendiary-only weapons, 80 (26.3%) used firearms as their sole weapon, 55 (18.1%) used explosives, bombs, or dynamite (E/B/D), 23 (7.6%) were melee-only, six (2.0%) used vehicles-only, four (1.3%) were chemicals-only, two (0.7%) used sabotage equipment, two (0.7%) were listed as “others,” and one (0.3%) used biological weapon. There was no recorded nuclear or radiological weapon use. In addition, 14 (4.6%) events used a mix of weapons.

Conclusions:
In the decade from 2008 through 2018, terrorist attacks on US soil used weapons with well-understood injury-causing modalities. A total of 217 fatal injuries (FI) and 660 non-fatal injuries (NFI) were sustained as a result of these events during that period.
Incendiary weapons were the most commonly chosen methodology, followed by firearms and E/B/D attacks. Firearm events contributed to a disproportionality high fatality count while E/B/D events contributed to a disproportionally high NFI count.
Ontogenesis Model of the L2 Lexical Representation
Authors: Bordag Denisa , Gor Kira , Opitz Andreas 
Published: June 2021

AbstractWe introduce the blueprint of the Ontogenesis Model of the L2 Lexical Representation (OM) that focuses on the development of lexical representations. The OM has three dimensions: linguistic domains (phonological, orthographic, and semantic), mappings between domains, and networks of lexical representations. The model assumes that fuzziness is a pervasive property of the L2 lexicon: most L2 lexical representations are low resolution and the ontogenetic curve of their development does not reach the optimum (i.e., the ultimate stage of their attainment with optimal encoding) in one or more dimensions. We review the findings on lexical processing and vocabulary training to show that the OM has a potential to provide an interpretation for the results that have been treated separately and to move us forward in building a comprehensive model of L2 lexical acquisition and processing.
United States – Certain Methodologies and Their Application to Anti-Dumping Proceedings Involving China: Re-Litigating through the Backdoor?
Authors: McDaniel Christine , Vermulst Edwin 
Published: June 2021

AbstractThis paper presents a legal-economic analysis of the World Trade Organization's Article 22.6 arbitration report on the dispute over certain United States’ antidumping methodologies. The Arbitrator sought to quantify the damages suffered by China due to US non-compliance with an earlier ruling. The case covered 25 antidumping duty determinations for which at least one of three methodologies (weighted average-to-transaction; single rate presumption; and zeroing) was incorrectly applied. Damage calculations rely heavily on how the counterfactual is defined – what would have been the duty had it not been for the inconsistent measures? The Arbitrator deemed a zero-duty counterfactual to be appropriate, but the justifications were in our view weak and illustrate the danger of an Arbitrator essentially performing re-litigation of violations that may or may not have occurred in the administrative investigations. We conclude that the Arbitrator may have gone above and beyond its mandate in this determination.
Partial disintegration of vegetable cell wall during cooking improves	vitamin K1 (phylloquinone) bioaccessibility in in vitro	digestion
Authors: Sriwichai Wichien , Collin Myriam , Avallone Sylvie 
Published: June 2021

Abstract. Vegetables rich in vitamin K consumption could prevent bleeding and maintain bone status. The aims of the present work were to investigate i) the effect of household cooking (i.e., boiling for 5 min at 100 °C in distilled water and stir-frying for 3 min at 180 °C in hot canola oil) on phylloquinone bioaccessibility of five rich phylloquinone leafy vegetables, namely Water spinach (Ipomoea aquatic Forssk), Amaranth (Amaranthus blitum subsp. oleraceus L.), Chinese broccoli (Brassica alboglabra), Pak choi (Brassica rapa L.) and Drumstick (Moringa oleifera Lam.), and ii) the structural changes of these leaves before and after in vitro gastro-intestinal digestion. All the experiments were realized in triplicate for each vegetable. The amounts of phylloquinone in leafy vegetables were noticeable in almost all species and ranged from 94 to 182 μg/100 g DM. Their cell wall polysaccharide contents greatly varied from 4.3 to 8.4 g for 100 g. The content in bioaccessible phylloquinone was low in raw leaves (<25 μg/100 g DM) as well as its bioaccessibility (<15%). Leaf pectin content impaired phylloquinone bioaccessibility using principal component analysis. Boiling and stir-frying significantly improved the bioaccessibility of phylloquinone in leaves by a factor of three to twelve and two to seven respectively (p<0.05). These variations were associated with changes in leaf structure. Palisade and spongy cells appeared ruptured and disorganized after stir-frying. Given the estimated bioaccessibility of phylloquinones, the consumption of 500 g of cooked wet leaves per day would cover phylloquinone needs of an individual adult average body weight.
Latitudinal Impacts of Joule Heating on the High‐Latitude Thermospheric Density Enhancement During Geomagnetic Storms
Authors: Wang Xin , Miao Juan , Lu Xian , Aa Ercha , Liu Ji , Wang Yuxian , Liu Siqing 
Published: June 2021

AbstractWe investigate the thermosphere latitudinal response to Joule heating from 265 geomagnetic storms during the period of January 2002 to December 2008. The total mass density enhancements at 400 km are derived from the Challenging Minisatellite Payload (CHAMP) and the Gravity Recovery and Climate Experiment (GRACE) satellites with temporal and spatial coverage. We examine Joule heating and its influence on the thermospheric density using data from the Defense Meteorological Satellite Program (DMSP) spacecraft and Weimer‐2001 electric potential model for storms. The results show that during geomagnetic storms, Joule heating can cause the thermospheric density to enhance in the higher‐latitude areas. In addition, during weak and moderate geomagnetic storms, the difference in the latitude corresponding to strong Joule heating with the latitude where high‐latitude thermospheric density enhances is only 0°–10° latitudes, while increases to 10°–15° for the intense storms. Besides, it is found that the peak density enhancement in LT is closer to peak Joule heating for more intense geomagnetic storms.
Organic Matter Compositions and Loadings in River Sediments From Humid Tropical Volcanic Luzon Island of the Philippines
Authors: Lin Baozhi , Liu Zhifei , Eglinton Timothy I. , Blattmann Thomas M. , Kandasamy Selvaraj , Haghipour Negar , Siringan Fernando P. 
Published: June 2021

AbstractTropical rivers deliver ∼60% of particulate organic carbon to the world ocean. However, compositions and loadings of sedimentary organic matter (OM) from tropical small mountainous rivers are largely unknown. Here, we provide an initial constrain on sources of sedimentary OM from 28 fluvial systems across Luzon in the Philippines by measuring total organic carbon (TOC), total nitrogen (TN), stable carbon isotope (δ13C) and radiocarbon activity of TOC (expressed as fraction modern—Fm), as well as grain size and mineral surface area (SA) of sediments. Results indicate that sediments in Luzon rivers contain both contemporary and 14C‐depleted OM (Fm: 0.71–1.06, mean 0.97 ± 0.07) with a wide range of δ13C values (−28.3‰ to −17.7‰, −24.9 ± 2.2‰). This is attributed to the OM sources originated from modern surface soil and 14C‐depleted subsoil and deep soil vegetated by C3 and C4 plants, with mean fraction of C3 plant at 80% ± 11%. Minor input from bedrock may also contribute to the 14C‐depleted OM in sediments, accounting for 6% ± 6%. Sediments in most rivers are featured by low OC loadings (OC/SA ratio < 0.4 mg C m−2), owing either to a less OM input or intensive OM degradation. The estimated yields of particulate OC from Luzon vary between 3.2 and 3.7 t km−2 yr−1, which is higher than most tropical large rivers.
Conditions for Topside Ion Line Enhancements
Authors: Rexer Theresa , Leyser Thomas , Gustavsson Björn , Rietveld Michael 
Published: June 2021

AbstractEnhanced ion line spectra as a response to magnetic field‐aligned high frequency (HF) pumping of the overdense polar ionosphere with left‐handed circular polarization, can be observed at the top and bottomside F‐region ionosphere under certain conditions. The European Incoherent Scatter (EISCAT) UHF radar was directed in magnetic zenith on October 18th and 19th, 2017 while stepping the pump frequency of the EISCAT Heating facility both upward and downward across the double resonance frequency of the fourth harmonic of the electron gyrofrequency and the local upper hybrid frequency, in a 2‐min‐on, 5‐min‐30‐s‐off pump cycle. We present observations of two separate cases of topside HF‐enhanced ion lines (THFIL). THFIL simultaneous to bottomside HFIL (BHFIL), and conditioned by the relative proximity of the HF pump frequency to the bottomside double resonance frequency, consistent with previous observations (Rexer et al., 2018, https://doi.org/10.1029/2018JA025822) were observed for HF pulses on 19th October. Recurring THFIL appearing after BHFIL have faded and conditioned by the relative proximity to the double resonance frequency on the topside ionosphere, were observed on 18th October. The THFIL are consistent with transionospheric propagation through artificial radio windows by L mode guiding of the pump wave, facilitated by large scale density ducts present in the plasma.
Leaf Trait Covariation and Its Controls: A Quantitative Data Analysis Along a Subtropical Elevation Gradient
Authors: Yang Yanzheng , Gou Ruikun , Li Wei , Kassout Jalal , Wu Jun , Wang Liming , Peng Changhui , Lin Guanghui 
Published: June 2021

AbstractElevation gradients are frequently treated as useful space‐for‐time substitutions for inferring trait variations in response to different environmental conditions. The independent variations in leaf traits in response to elevation are well understood, but far less is known about trait covariation and its controls. This limits our understanding of the principles and mechanisms of leaf trait covariation, especially along elevation gradients in subtropical forests. Here, we studied the covariation among seven functional traits, including leaf size (LS), leaf nitrogen per unit mass (Nmass), leaf nitrogen per unit area (Narea), leaf mass per area (LMA), leaf dry matter content (LDMC), leaf thickness (LT) and the leaf internal‐to‐ambient CO2 ratio (Ci:Ca, termed χ). Sampling was conducted on 41 species in a subtropical forest on Mount Huangshan, China, and the data were analyzed using multivariate analysis and variance partitioning procedures. We found that (a) The first three principal components captured 79% of the total leaf trait covariation, which was caused mainly by within site differences; (b) Nmass and LDMC were positively correlated with soil water content (SW) and negatively correlated with vapor pressure deficit (VPD), while χ showed negative relationships with elevation; and (c) 78% of the variation in the studied plant functional traits could be explained by climate, soil, and family controls in combination, while family distribution was the most important determining factor for trait covariation along the elevation gradient. Our findings provide relevant insights into plant adaptation to environmental gradients and present useful guidelines for ecosystem management and planning.
Extracellular vesicles from human iPSCs enhance reconstitution capacity of cord blood-derived hematopoietic stem and progenitor cells
Authors: Karnas Elżbieta , Sekuła-Stryjewska Małgorzata , Kmiotek-Wasylewska Katarzyna , Bobis-Wozowicz Sylwia , Ryszawy Damian , Sarna Michał , Madeja Zbigniew , Zuba-Surma Ewa K. 
Published: June 2021

AbstractCord blood (CB) represents a source of hematopoietic stem and progenitor cells (CB-HSPCs) for bone marrow (BM) reconstitution, but clinical CB application is limited in adult patients due to the insufficient number of CB-HSCPCs and the lack of effective ex vivo approaches to increase CB-HSPC functionality. Since human-induced pluripotent stem cells (hiPSCs) have been indicated as donor cells for bioactive extracellular vesicles (EVs) modulating properties of other cells, we are the first to employ hiPSC-derived EVs (hiPSC-EVs) to enhance the hematopoietic potential of CB-derived CD45dimLin-CD34+cell fraction enriched in CB-HSPCs. We demonstrated that hiPSC-EVs improved functional properties of CB-HSPCs critical for their hematopoietic capacity including metabolic, hematopoietic and clonogenic potential as well as survival, chemotactic response to stromal cell-derived factor 1 and adhesion to the model components of hematopoietic niche in vitro. Moreover, hiPSC-EVs enhanced homing and engraftment of CB-HSPCs in vivo. This phenomenon might be related to activation of signaling pathways in CB-HSPCs following hiPSC-EV treatment, as shown on both gene expression and the protein kinases activity levels. In conclusion, hiPSC-EVs might be used as ex vivo modulators of CB-HSPCs capacity to enhance their functional properties and augment future practical applications of CB-derived cells in BM reconstitution.
Dnmt1 has de novo activity targeted to transposable elements
Authors: Haggerty Chuck , Kretzmer Helene , Riemenschneider Christina , Kumar Abhishek Sampath , Mattei Alexandra L. , Bailly Nina , Gottfreund Judith , Giesselmann Pay , Weigert Raha , Brändl Björn , Giehr Pascal , Buschow René , Galonska Christina , von Meyenn Ferdinand , Pappalardi Melissa B. , McCabe Michael T. , Wittler Lars , Giesecke-Thiel Claudia , Mielke Thorsten , Meierhofer David , Timmermann Bernd , Müller Franz-Josef , Walter Jörn , Meissner Alexander 
Published: June 2021

AbstractDNA methylation plays a critical role during development, particularly in repressing retrotransposons. The mammalian methylation landscape is dependent on the combined activities of the canonical maintenance enzyme Dnmt1 and the de novo Dnmts, 3a and 3b. Here, we demonstrate that Dnmt1 displays de novo methylation activity in vitro and in vivo with specific retrotransposon targeting. We used whole-genome bisulfite and long-read Nanopore sequencing in genetically engineered methylation-depleted mouse embryonic stem cells to provide an in-depth assessment and quantification of this activity. Utilizing additional knockout lines and molecular characterization, we show that the de novo methylation activity of Dnmt1 depends on Uhrf1, and its genomic recruitment overlaps with regions that enrich for Uhrf1, Trim28 and H3K9 trimethylation. Our data demonstrate that Dnmt1 can catalyze DNA methylation in both a de novo and maintenance context, especially at retrotransposons, where this mechanism may provide additional stability for long-term repression and epigenetic propagation throughout development.