bluuebunny/crossref_metadata_2025_split huggingface dataset:
Precise radial velocities of giant stars
Authors: Heeren Paul , Reffert Sabine , Trifonov Trifon , Wong Ka Ho , Lee Man Hoi , Lillo-Box Jorge , Quirrenbach Andreas , Arentoft Torben , Albrecht Simon , Grundahl Frank , Andersen Mads Fredslund , Antoci Victoria , Pallé Pere L. 
Published: February 2021

Context. Using the Hamilton Échelle Spectrograph at Lick Observatory, we have obtained precise radial velocities (RVs) of a sample of 373 G- and K-giant stars over more than 12 yr, leading to the discovery of several single and multiple planetary systems. The RVs of the long-period (~53 yr) spectroscopic binary ε Cyg (HIP 102488) are found to exhibit additional regular variations with a much shorter period (~291 days).
Aims. We intend to improve the orbital solution of the ε Cyg system and attempt to identify the cause of the nearly periodic shorter period variations, which might be due to an additional substellar companion.
Methods. We used precise RV measurements of the K-giant star ε Cyg from Lick Observatory, in combination with a large set of RVs collected more recently with the SONG telescope, as well as archival data sets. We fit Keplerian and fully dynamical N-body models to the RVs in order to explore the properties of a previously known spectroscopic stellar companion and to investigate whether there is an additional planetary companion in the system. To search for long-term stable regions in the parameter space around the orbit of this putative planet, we ran a stability analysis using an N-body code. Furthermore, we explored the possibility of co-orbital bodies to the planet with a demodulation technique. We tested the hypothesis of ε Cyg being a hierarchical stellar triple by using a modified version of the N-body code. Alternative causes for the observed RV variations, such as stellar spots and oscillations, were examined by analyzing photometric data of the system and by comparing its properties to known variable stars with long secondary periods and heartbeat stars from the literature.
Results. Our Keplerian model characterizes the orbit of the spectroscopic binary to higher precision than achieved previously, resulting in a semi-major axis of a = 15.8 AU, an eccentricity of e = 0.93, and a minimum mass of the secondary of msini = 0.265 M⊙. Additional short-period RV variations closely resemble the signal of a Jupiter-mass planet orbiting the evolved primary component with a period of 291 d, but the period and amplitude of the putative orbit change strongly over time. Furthermore, in our stability analysis of the system, no stable orbits could be found in a large region around the best fit. Both of these findings deem a planetary cause of the RV variations unlikely. Most of the investigated alternative scenarios also fail to explain the observed variability convincingly. Due to its very eccentric binary orbit, it seems possible, however, that ε Cyg could be an extreme example of a heartbeat system.
Platelet Function and Turnover in Essential Thrombocythemia: A Systematic Review
Authors: Kvernberg Joachim , Grove Erik Lerkevang , Ommen Hans Beier , Hvas Anne-Mette 
Published: February 2021

AbstractEssential thrombocythemia (ET) is a myeloproliferative neoplasm characterized by increased platelet counts. ET has an incidence of 0.6 to 2.5 per 100,000 per year in Europe and North America. The disease is characterized by an increased thromboembolic risk, possibly caused by increased platelet counts. Furthermore, increased platelet function and/or increased platelet turnover may play a role. We aimed to explore: (1) whether platelet function and platelet turnover are increased in ET patients compared with healthy controls, and (2) whether these parameters are associated with increased thromboembolic risk and, therefore, may support decision-making on treatment in ET patients. We performed a systematic literature search on March 20, 2020 in Embase and PubMed following the Preferred Reporting Items for Systematic and Meta-Analysis (PRISMA) guidelines. In total, 1,923 articles were identified, 38 of which were included according to prespecified inclusion and exclusion criteria. Among the 38 studies, platelet activation (CD36 and CD62P) was investigated in 18 studies and was found to be increased in 12 of these. Platelet aggregation was investigated in 21 studies and was reported to be reduced in 20 of them. Platelet turnover (immature platelet count and mean platelet volume) was investigated in five studies with inconclusive results. No parameters were reported to predict the risk of thromboembolic events. In conclusion, platelet activation was increased in ET patients, but platelet aggregation was reduced. Future studies exploring markers of thromboembolic risk in ET patients are warranted.
Two-step manufacturing of hundreds of meter-long silicon micrometer-size core optical fibers with less than 0.2 dB/cm background losses
Authors: Kudinova M. , Bouwmans G. , Vanvincq O. , Habert R. , Plus S. , Bernard R. , Baudelle K. , Cassez A. , Chazallon B. , Marinova M. , Nuns N. , Bigot L. 
Published: February 2021

This work reports on the fabrication and the characterization of hybrid optical fibers with silicon core and silica cladding. Adopting a two-step manufacturing technique derived from the stack-and-draw method, silicon-core fibers with core dimensions ranging from about 0.8 μm to 3.5 μm have been successively drawn into hundreds of meter-long fibers. A 3.3 μm diameter core fiber has been more extensively characterized and background losses for this as-drawn fiber are less than 0.2 dB/cm between 1250 nm and 1650 nm, with a minimum of 0.12 dB/cm around 1600 nm. The crystalline state of the core and the limited impact of oxygen contamination were confirmed by Raman scattering, x-ray diffraction, HR-STEM, and ToF-SIMS analysis. Transmission peaks associated with specific modal distributions are evidenced under certain injection conditions and their positions are shown to be in good accordance with mode cut-off wavelengths of a step-index silicon-core fiber.
Learning to silence saccadic suppression
Authors: Scholes Chris , McGraw Paul V. , Roach Neil W. 
Published: February 2021

Significance
Sensory systems often suppress self-generated sensations in order to discriminate them from those arising in the environment. The suppression of visual sensitivity during rapid eye movements is well established, and although functionally beneficial most of the time, it can limit the performance of certain tasks. Here, we show that with repeated practice, mechanisms that suppress visual signals during eye movements can be modified. People trained to detect brief visual patterns learn to turn off suppression around the expected time of the target. These findings demonstrate an elegant form of plasticity, capable of improving the visibility of behaviorally relevant stimuli without compromising the wider functional benefits of suppression.
Language focused episodes by monolingual teachers in English Medium Instruction science lessons
Authors: An Jiangshan , Macaro Ernesto , Childs Ann 
Published: February 2021

Abstract
This study is situated in a newly emerging EMI setting in China where an Anglophone high school curriculum is
taught by predominantly foreign teachers through English to local Chinese students. These teachers are termed ‘monolingual
teachers’ in the sense that they cannot use the students’ L1 as a resource in their teaching should they wish to, as opposed to
the typical bilingual teachers commonly explored in the existing EMI literature. Through quantitative and qualitative analysis of
30 video-recorded EMI science lessons taught by 15 monolingual teachers we identified and explored the language-focused-episodes
(LFEs) where students’ attention was explicitly diverted from the content plane to the language plane. We found very limited
explicit language instruction, with non-technical vocabulary being the main type of LFEs, and only a narrow range of grammatical
features being attended to. The implications for this lack of focus on language are discussed in the context of monolingual
teachers but also with reference to the potential for bilingual teachers to use both L1 and L2 for LFEs.
The role of language in scaffolding content & language integration in CLIL science classrooms
Authors: Tang Kok-Sing 
Published: February 2021

Abstract
This chapter synthesizes
the contributions from the authors in this edited volume by addressing two overarching questions. First, what is the role of language in mediating
science teaching and learning in a CLIL science classroom? Second, to what extent can content and language be integrated or
separated in CLIL instruction and assessment? In addressing the first question, I distil three major perspectives of how the
authors conceive the role of language as a scaffolding tool. These roles are: (a) providing the discursive means and structure for
classroom interaction to occur, (b) enabling students’ construction of knowledge through cognitive and/or linguistic processes,
and (c) providing the semantic relationships for science meaning-making. These three perspectives roughly correspond to the
discursive, cognitive-linguistic, and semiotic roles of language respectively. In addition, two other roles – epistemic and
affective, though not emphasized in this volume, are also discussed. In addressing the second question, I raise a dilemma
concerning the integration of content and language. While there are clear political and theoretical arguments calling for an
inseparable integration, there is also a common practice to separate content and language as distinct entities for various
pedagogical and analytical purposes. In revolving this conundrum, I suggest a way forward is to consider the differences in the
various roles of language (discursive/cognitive/linguistic vs. semiotic/epistemic/affective) or the levels of language involved
(lexicogrammar vs. text/genre).
Verbal working memory as a predictor of explicit and implicit knowledge of English passive voice
Authors: Pawlak Miroslaw , Biedroń Adriana 
Published: February 2021

Abstract
While there is copious evidence concerning the effectiveness of different instructional options in teaching
grammar (e.g., Nassaji, 2017; Pawlak, 2017),
less is known about the extent to which the contribution of pedagogical intervention is mediated by individual factors. The same
can be said about the product of instructed but also uninstructed second language acquisition, that is the knowledge of target
language grammar. The chapter attempts to shed light on one such variable, that is working memory, which has recently been an object
of intensive empirical inquiry (e.g., Li, 2017; Wen, Biedroń, & Skehan, 2016). It reports the results of a study that investigated the role of verbal working
memory in the development of explicit and implicit knowledge of the English passive voice. Participants were 156 Polish university
students enrolled in a three-year BA program in English. The data on verbal working memory were collected by means of the
Polish Listening Span Test (PLSPAN), developed by Zychowicz, Biedroń and
Pawlak (2017). Explicit knowledge was tapped by means of an untimed grammatically judgment test, which focused on
reception, and a traditional grammar test, which targeted production. Implicit knowledge was tapped through a timed grammaticality
judgment test for reception and a focused communication task (Ellis, 2003) for
production. Correlational analysis demonstrated that verbal working memory was a weak predictor of explicit productive and
receptive knowledge but not implicit knowledge.
Phonological short-term memory capacity and L2 oral performance
Authors: Granena Gisela , Yilmaz Yucel 
Published: February 2021

Abstract
phonological short-term memory (PSTM) capacity is the ability to retain verbal information briefly (Archibald
& Gathercole, 2006). Since PSTM facilitates the storage of verbal material, one expects a positive relationship between PSTM
and several aspects of second language (L2) learning. Some studies have found a relationship between PSTM and oral production
skills, such as fluency (e.g., O’Brien et al., 2006). This paper reports on the results
of a study that looked at the inter-relations between complexity, accuracy, and fluency (CAF), and between these dimensions and
PSTM. One hundred and thirty-five L2 learners of Spanish participated in the study. Results showed that performance in one L2
speech dimension did not have a negative impact on performance in another dimension, but that as complexity increased or
decreased, there was a better chance of fluency than accuracy also increasing or decreasing. PSTM capacity was related to
complexity and fluency, but not to accuracy. These results were interpreted as lending some support to Skehan’s Trade-off
Hypothesis (Skehan, 2009).
Armed conflict and resistance in indigenous Colombia
Authors: Ferrari Simone 
Published: February 2021

Abstract
The present proposal is to analyze the linguistic
landscape of the municipality of Toribío (Colombia) as a means of
testimony of the autonomous indigenous resistance against the
violence suffered by the Nasa communities during the Colombian
Conflict. The methodological approach proposed is based on the
cultural analysis of the units from their context referent to social
tensions, with an emphasis on its “meaning-making” (Ivkovic & Arfin, 2019)
value. This will also rely on palabrandar, a
category of the Nasa epistemology that means the ability to “walk
the word” (Almendra,
2017, p. 73) so that it may be a transformative path and
action of the community environment.
Donde su visión se hace realidad
Authors: Amgott Natalie 
Published: February 2021

Abstract
This chapter examines the Linguistic Landscape
of business plazas in Orlando, Florida to identify the roles of
Spanish and English and illustrate how signage converges with local
neighborhoods. Data consists of storefront signage for 119
businesses in 10 Orlando plazas. Quantitative data analysis
demonstrated how language represented the surrounding populations
(Van Mensel, Vandenbroucke,
& Blackwood, 2016). By integrating grammar of visual
design (Kress & Van Leeuwen,
1996), geosemiotics (Scollon & Scollon, 2003), and multimodality (Kress, 2003, 2010), I examined how
multimodal choices further index certain populations. Findings
indicate the importance of neighborhood plaza culture in language
choice and the role of gentrification and translocal identities in
the creation of Orlando business signs.
Risk modelling further implicates the angiogenesis pathway in anterior cruciate ligament ruptures
Authors: Rahim Masouda , Lacerda Miguel , Collins Malcolm , Posthumus Michael , September Alison V. 
Published: February 2021

ABSTRACTThe aim of this study was to explore the interactions between the interleukins and the angiogenesis signalling pathway, following a pathway‐based approach. Statistical modelling tools were used to develop a preliminary polygenic risk assessment model for anterior cruciate ligament (ACL) ruptures, incorporating the angiogenesis signalling genes (VEGFA and KDR) and interleukins (IL1B, IL6, IL6R) which also function to regulate angiogenesis. Multivariate logistic regression analysis was used to identify the most informative contributors to ACL rupture risk from a range of eleven potential intrinsic risk factors: age, sex, BMI and eight genetic polymorphisms within five genes, namely, IL1B rs16944 C/T, IL6 rs1800795 G/C, IL6R rs2228145 C/A, VEGFA rs699947 C/A, VEGFA rs1570360 G/A, VEGFA rs2010963 C/G, KDR rs2071559 A/G and KDR rs1870377 T/A. A total of 232 asymptomatic controls (CON) and 234 participants with surgically diagnosed ACL ruptures, of which 135 participants reported a non‐contact mechanism of injury (NON subgroup), were previously genotyped for the selected polymorphisms. The polygenic risk model identified the VEGFA rs699947 CC genotype (p = 0.024, odds ratio (OR): 3.35, 95% confidence interval (CI): 1.17–9.62), VEGFA rs2010963 GC genotype (p = 0.049, OR: 2.43, 95% CI: 1.00–5.87), age (p = 0.011, OR: 0.97, 95% CI: 0.95–0.99) and BMI (p = 0.009, OR:1.09, 95% CI: 0.57–2.11) as the most significant predictors of ACL rupture risk from the data included. The results of this study highlight VEGFA, age and BMI as biologically significant components of this network requiring further investigation in the context of musculoskeletal soft tissue injury risk.Highlights
The findings of this study highlight the VEGFA gene, age and BMI as biologically significant contributors to ACL rupture susceptibility.
Upon further validation of these risk factors, they may be included in genetic risk assessment tools to design pre‐habilitation strategies, prescribe appropriate treatment strategies after injury or to assess how an individual is likely to respond to load.
Polygenic risk models aid in highlighting the components of the complex ECM remodelling pathway requiring further investigation, using a multidisciplinary approach.
VEGFA is a key angiogenic protein contributing to ECM homeostasis and may therefore have potential therapeutic implications that need to be explored.
Multiphoton and plasma absorption measurements in CaF2 and UV fused silica at 473 nm
Authors: Grudtsyn Ya V , Koribut A V , Rogashevskii A A , Gerasimova Yu A , Trofimov V A , Yalovoi V I , Semjonov S L 
Published: February 2021

Abstract
Transmission versus intensity in 100 μm CaF2 and UV fused silica samples at a wavelength of 473 nm for different durations of the initial pulse was studied. Fitting the experimental data with a model based on the solution of the nonlinear Schrödinger equation and taking into account multiphoton absorption and absorption by the plasma, as well as the Kerr nonlinearity, diffraction and dispersion of the medium, made it possible to obtain the values of multiphoton (k-number of photons) σk
and plasma absorption (inverse bremsstrahlung) σ cross sections. The obtained values are σ
4 = 2.5 × 10−117 cm8 s3, σ = 3.6 × 10−18 cm2 for CaF2 and σ
4 = 4.4 × 10−116 cm8 s3, σ = 3 × 10−18 cm2 for UV fused silica.
Searching for sub-MeV boosted dark matter from xenon electron direct detection *
Authors: Cao Qing-Hong , Ding Ran , Xiang Qian-Fei 
Published: February 2021

Abstract
Direct detection experiments tend to lose sensitivity in searches for sub-MeV light dark matter candidates due to the threshold of recoil energy. However, such light dark matter particles could be accelerated by energetic cosmic rays, such that they could be detected with existing detectors. We derive constraints on the scattering of a boosted light dark matter particle and electron from the XENON100/1T experiment. We illustrate that the energy dependence of the cross section plays a crucial role in improving both the detection sensitivity and also the complementarity of direct detection and other experiments.
Correlations of conserved charges and QCD phase structure *
Authors: Wen Rui , Fu Wei-jie 
Published: February 2021

Abstract
Correlations of conserved charges, i.e., the baryon number, electric charge, and strangeness, are calculated at finite temperature and chemical potentials up to the fourth order. The calculations are done in a 2+1 flavor low energy effective theory, in which the quantum and thermal fluctuations are encoded through the evolution of flow equations within the functional renormalization group approach. Strangeness neutrality and a fixed ratio of the electric charge to the baryon number density are implemented throughout the computation. We find that higher-order correlations incorporate more sensitive critical dynamics than the quadratic ones. In addition, a non-monotonic dependence of the fourth-order correlations between the baryon number and strangeness, i.e.,

and

, on the collision energy is also observed.
Phase transition and quasinormal modes for charged black holes in 4D Einstein-Gauss-Bonnet gravity *
Authors: Zhang Ming , Zhang Chao-Ming , Zou De-Cheng , Yue Rui-Hong 
Published: February 2021

Abstract
In four-dimensional Einstein-Gauss-Bonnet (EGB) gravity, we consider the thermodynamic and phase transitions of (charged) AdS black holes. For the negative GB coefficient

, the system allows two physical critical points, corresponding to the reentrant phase transition, when the charge

. For arbitrary

, the system always leads to a van der Waals phase transition. We then study the quasinormal modes (QNMs) of massless scalar perturbations to probe the van der Waals-like phase transition between small and large black holes (SBH/LBH) for (charged) AdS black holes. We find that the signature of this SBH/LBH phase transition in the isobaric process can be detected since the slopes of the QNM frequencies change dramatically in small and large black holes near the critical point. The obtained results further support that QNMs can be a dynamic probe of thermodynamic properties in black holes.
Multiscalar B-L extension based on S
4 flavor symmetry for neutrino masses and mixing *
Authors: Vien V. V. , Long H. N. 
Published: February 2021

Abstract
A multiscalar and nonrenormalizable

extension of the standard model (SM) with

symmetry which successfully explains the recently observed neutrino oscillation data is proposed. The tiny neutrino masses and their hierarchies are generated via the type-I seesaw mechanism. The model reproduces the recent experiments of neutrino mixing angles and Dirac CP violating phase in which the atmospheric angle

and the reactor angle

get the best-fit values while the solar angle

and Dirac CP violating phase (

) are in

range of the best-fit value for the normal hierarchy (NH). For the inverted hierarchy (IH),

gets the best-fit value and

together with

are in the

range, while

is in

range of the best-fit value. The effective neutrino masses are predicted to be

for the NH and

for the IH, in good agreement with the most recent experimental data.
Research on the readout noise suppression method for digital correlated double sampling
Authors: Duan Wei , Song Qian , Wei Ming-Zhi , Zhao Zhao-Wang , Wang Wei , Zhang Yu-Heng , Feng Zhi-Wei 
Published: February 2021

Abstract
As the areas of CCD detectors and CCD mosaics have become larger and larger, the number of readout channels in astronomical cameras has increased accordingly to keep the image readout time within an acceptable range. For the large area cameras or the mosaic cameras, the analog Correlated Double Sampling (aCDS) circuit used in traditional astronomical cameras for suppressing readout noise is difficult to integrate into the camera controllers within the constraints of the space and energy consumption. Recently, digital CDS (dCDS) technology has been developed to solve this problem, which also offers novel analysis and noise suppression methods. In this study, a mathematical model is presented to conveniently analyze the frequency characteristic of a dCDS circuit, which is then simulated by a numerical method for investigating the noise suppression capability with different sampling weights. Importantly, using this model, the extreme point with lowest readout noise can be predicted for a certain dCDS model; and for a specific CCD readout frequency, readout noise can be suppressed by selecting the proper dCDS model. A testing system is then constructed for validating the efficiency of the proposed method.