bluuebunny/crossref_metadata_2025_split huggingface dataset:
Biomass allocation and seasonal non-structural carbohydrate dynamics do not explain the success of tall forbs in short alpine grassland
Authors: Hiltbrunner Erika , Arnaiz Jonas , Körner Christian 
Published: May 2021

AbstractThe majority of alpine plants are of small stature. Through their small size alpine plants are decoupled from the free atmospheric circulation and accumulate solar heat. However, a few alpine species do not follow that “rule” and protrude with their aboveground structures from the microclimatic shelter of the main canopy boundary layer. We aim at explaining the phenomenon of being tall by exploring the biomass production and carbon relations of four pairs of small and tall phylogenetically related taxa in alpine grassland. We compared species and stature-specific biomass allocation, shifts in non-structural carbohydrate (NSC) concentrations in different tissues throughout the season, and we used 13C labels to track carbon transfer from leaves to belowground structures. Small and tall herbs did not differ in their above- to belowground biomass allocation. The NSC composition (starch, fructan, simple sugars) and allocation did not show a stature-specific pattern, except for higher concentrations of simple sugars in tall species during their extended shoot growth. In relative terms, tall species had higher NSC pools in rhizomes, whereas small species had higher NSC pools in roots. Our findings do not place tall alpine forbs in an exceptional category in terms of biomass allocation and carbohydrate storage. The tall versus small stature of the examined herbs does not seem to be associated with specific adjustments in carbon relations. 13C pulse labelling revealed early C autonomy in young, unfolding leaves of the tall species, which are thus independent of the carbon reserves in the massive belowground organs.
A spectral shape optimization problem with a nonlocal competing term
Authors: Mazzoleni Dario , Ruffini Berardo 
Published: May 2021

AbstractWe study the minimization of a spectral functional made as the sum of the first eigenvalue of the Dirichlet Laplacian and the relative strength of a Riesz-type interaction functional. We show that when the Riesz repulsion strength is below a critical value, existence of minimizers occurs. Then we prove, by means of an expansion analysis, that the ball is a rigid minimizer when the Riesz repulsion is small enough. Eventually we show that for certain regimes of the Riesz repulsion, regular minimizers do not exist.
Müller–Zhang truncation for general linear constraints with first or second order potential
Authors: Gallenmüller Dennis 
Published: May 2021

AbstractLet $$\mathcal {B}$$
B
be a homogeneous differential operator of order $$l=1$$

l
=
1

or $$l=2$$

l
=
2

. We show that a sequence of functions of the form $$(\mathcal {B}u_j)_j$$

(
B

u
j

)

j

converging in the $$L^1$$

L
1

-sense to a compact, convex set K can be modified into a sequence converging uniformly to this set provided that the derivatives of order l are uniformly bounded. We prove versions of our result on the whole space, an open domain, and for K varying uniformly continuously on an open, bounded domain. This is a conditional generalization of a theorem proved by S. Müller for sequences of gradients. Moreover, a potential of order two for the linearized isentropic Euler system is constructed.
Dispersion EPR: Considerations for Low-Frequency Experiments
Authors: Hyde James S. , Strangeway Robert A. , Sidabras Jason W. 
Published: May 2021

AbstractThe hypothesis is made that the dispersion electron paramagnetic resonance (EPR) spectrum can yield a higher signal-to-noise ratio than the absorption spectrum in diagnostic examinations if phase noise in the bridge is under control. The rationale for this hypothesis is based on the observation that the dispersion spectrum becomes more intense than the absorption spectrum at high incident powers. The rationale is dependent on optimization of high microwave efficiency (Λ; mT/W1/2) and low-quality factor (Q-value) sample resonators as well as the use of microwave sources with reduced phase noise. Microwave frequencies from 1.2 to 94 GHz are considered. Although the dispersion display appears to be observable with an adequate signal-to-noise ratio for most EPR research initiatives, a weakness of microwave bridges for studies at high incident microwave power was identified. Spurious leakage of incident microwave power through the circulator, thereby bypassing the probe leading to the resonator, can result in a decreased signal-to-noise ratio in both absorption and dispersion because of phase noise. For dispersion EPR with low Q-value sample resonators, this leakage is the primary contributor to phase noise at the receiver. In this work, we focus on the design of microwave reflection bridges and discuss possible methods to ameliorate this source of noise.
Relation between the size of patent foramen ovale and the volume of acute cerebral ischemic lesion in young patients with cryptogenic ischemic stroke
Authors: Benvenuti Federica , Meucci Francesco , Vuolo Luisa , Nistri Rita , Pracucci Giovanni , Picchioni Antonella , Venturini Gabriele , Stolcova Miroslava , Failli Ylenia , Nencini Patrizia , Di Mario Carlo , Sarti Cristina ,   on behalf of Heart and Brain Team Careggi University Hospital, Florence, Italy
Published: May 2021

Abstract
Background
Patent foramen ovale (PFO) closure is superior to medical therapy alone to prevent stroke recurrence in selected patients. Small cortical infarcts and large right to left shunts seem to identify patients who will benefit most from closure. We aimed to study the correlation between the size of the PFO and the volume of cerebral ischemic lesions in young patients with cryptogenic ischemic stroke.

Methods
PFO dimensions and acute ischemic lesion volume of 20 patients, aged<55 years, were analyzed with transesophageal echocardiography and brain magnetic resonance imaging, respectively. The association between the volume of ischemic lesions with the length of PFO, maximum separation between septum primum and septum secundum, and the combination of the twos was explored.

Results
A direct statistically significant correlation was found between cerebral lesion volume and maximum separation of septum primum and septum secundum (p=0.047). Length of PFO showed a non-significant trend towards an inverse correlation with lesion volume (p=0.603). Multiple linear regression analysis showed that cerebral lesion volume was dependent directly on maximum separation and inversely on length of PFO (regression coeff. −0,837; p= 0.057; 2,536, p=0.006, respectively).

Conclusions
These data suggest that even small PFO might be pathogenetic in case of small cerebral infarcts and that large cerebral infarcts might be PFO related if the shunt is large. If confirmed, the combination of detailed characteristics of PFO with the volume of cerebral infarct could be integrated in a new score to select patients who would take real advantage from a percutaneous closure.
Monetary risk measures for stochastic processes via Orlicz duality
Authors: Kountzakis Christos E. , Rossello Damiano 
Published: May 2021

AbstractIn this article, we extend the framework of monetary risk measures for stochastic processes to account for heavy tailed distributions of random cash flows evolving over a fixed trading horizon. To this end, we transfer the $$L^p$$

L
p

-duality underlying the representation of monetary risk measures to a more flexible Orlicz duality, in spaces of stochastic processes modelling random future evolution of financial values in continuous time over a finite horizon. This contributes, on the one hand, to the theory of real-valued monetary risk measures for processes and, on the other hand, supports a new representation of acceptability indices of financial performance.
Decadal changes in the rice-cropping system in the Ayeyarwady Delta using a large archive of satellite imagery from 1981 to 2020
Authors: Sakai Toru , Omori Keisuke , Oo Aung Naing , Ma Swe Swe , Zaw Yan Naung 
Published: May 2021

AbstractIn the last 40 years, the rice-cropping system has considerably changed in the Ayeyarwady Delta. The large archive of satellite imagery provides a history of how land and water resource managements have changed in the face of growing populations, resource demand, and climate change. This study aimed to assess the decadal changes in the rice-cropping system in the Ayeyarwady Delta by using the large archive of satellite imagery for the last 40 years (1981 − 2020). The long-term NDVI dataset provided various information on rice cultivation. Signal processing techniques were used to detect on the historical changes in the rice-cropping system, and the impact of climate change was assessed by using trend analysis. Until the 1980s, single-cropping of summer rice was dominant in the Delta. To enhance the grain yield of rice, the irrigation facilities were introduced in 1992 under an initiative of the Myanmar government. As a result, the annual cropping intensities increased from 1.087 ± 0.390 in the 1980s to 1.422 ± 0.499 in the 2010s. The information on historical change in the rice-cropping system would be useful to consider the practical and cost-effective utilization of remaining land and water resources. Moreover, the trend analysis of NDVI time-series showed negative trends in coastal areas. This indicates that the rice production in coastal areas has been constrained by the saline intrusion. The salt-affected areas are expected to expand under future climate change scenarios. Government support is highly required for sustainable rice production in the Delta.
No evidence that nest site choice in Pied Flycatchers is mediated by assessing the clutch size of a heterospecific, the Great Tit
Authors: Slagsvold Tore , Wiebe Karen L. 
Published: May 2021

AbstractAmong species that use similar resources, an individual may benefit by observing and copying the behavioural decision of a heterospecific. We tested the hypothesis of heterospecific social learning in passerine birds, namely that a migrant species, the Pied FlycatcherFicedula hypoleuca,uses external markings on the nest cavities of a resident species, the Great TitParus major, as cues when choosing a nest site. Others have suggested that prospecting flycatchers assess the clutch size of tit “demonstrators” by entering their nest boxes and, assuming that a large clutch indicates a high-quality individual, will copy the nest appearance of tits with large, but not small clutches. During a 4-year period in Norway, we designed a similar study but did not find that flycatchers based their nest choice on the clutch size of tits. Neither were there any relationships between clutch size of the tit and its laying date, incubation behaviour, or the number of eggs visible through nest material during egg-laying so Pied Flycatchers did not use these indirect cues to assess quality of the tutor. Filming of tit nests showed that prospecting flycatchers did not enter tit nest boxes to assess the content. Indeed, incubating female tits only left their nest boxes for short bouts of unpredictable duration so there was little opportunity for flycatchers to inspect the nest contents unnoticed. Our study calls into question the mechanism of using the content of tit nests as public information for choosing traits of nest sites based on external characteristics. We suggest that similar studies of nest site choice in relation to possible social information transfer be replicated more widely.
Modeling cells spreading, motility, and receptors dynamics: a general framework
Authors: Serpelloni Mattia , Arricca Matteo , Bonanno Claudia , Salvadori Alberto 
Published: May 2021

Abstract
The response of cells during spreading and motility is dictated by several multi-physics events, which are triggered by extracellular cues and occur at different time-scales. For this sake, it is not completely appropriate to provide a cell with classical notions of the mechanics of materials, as for “rheology” or “mechanical response”. Rather, a cell is an alive system with constituents that show a reproducible response, as for the contractility for single stress fibers or for the mechanical response of a biopolymer actin network, but that reorganize in response to external cues in a non-exactly-predictable and reproducible way. Aware of such complexity, in this note we aim at formulating a multi-physics framework for modeling cells spreading and motility, accounting for the relocation of proteins on advecting lipid membranes.

Graphic Abstract
We study the mechanical response under compression/extension of an assembly composed of 8 helical rods, pin-jointed and arranged in pairs with opposite chirality. In compression we find that, whereas a single rod buckles (a), the rods of the assembly deform as stable helical shapes (b). We investigate the effect of different boundary conditions and elastic properties on the mechanical response, and find that the deformed geometries exhibit a common central region where rods remain circular helices. Our findings highlight the key role of mutual interactions in the ensemble response and shed some light on the reasons why tubular helical assemblies are so common and persistent.
Does the open-cell regime foster inmates’ legal capability? Evidence from two Italian prisons
Authors: Dalla Pellegrina Lucia , Saraceno Margherita 
Published: May 2021

AbstractEvidence emerging from our novel in-prison survey shows that non-criminal legal problems of prison inmates mainly relate to family law matters, contract liability, and administrative procedures. The rate of subjects who face legal issues increases after imprisonment. Employing logit estimation techniques, we test the hypothesis according to which isolation due to imprisonment obstructs legal problem resolution. Results suggest that the open-cell regime has increased the rate of resolution of some family-related problems (divorce and child custody) while not affecting others (legacy issues). Similarly, while common problems with the public administration seem easier to solve under the open-cell regime, those related to contract liability do not. We infer that the open-cell regime may support the resolution of legal problems that usually require standardised approaches. Policy implications supporting the open-cell regime follow.
‘All things are in flux’: China in global science
Authors: Marginson Simon 
Published: May 2021

AbstractSince 1990, a large and dynamic global science system has evolved, based on grass roots collaboration, and resting on the resources, infrastructure and personnel housed by national science systems. Euro-American science systems have become intensively networked in a global duopoly; and many other countries have built national science systems, including a group of large- and middle-sized countries that follow semi-autonomous trajectories based on state investment, intensive national network building, and international engagement, without integrating tightly into the global duopoly. The dual global/national approach pursued by these systems, including China, South Korea, Iran and India, is not always fully understood in papers on science. Nevertheless, China is now the number two science country in the world, the largest producer of papers and number one in parts of STEM physical sciences. The paper investigates the remarkable evolution of China’s science funding, output, discipline balance, internationalisation strategy and national and global networking. China has combined global activity and the local/national building of science in positive sum manner, on the ground of the nationally nested science system. The paper also discusses limits of the achievement, noting that while China-US relations have been instrumental in building science, a partial decoupling is occurring and the future is unclear.
Move or perish? Sticky mobilities in the Swiss academic context
Authors: Sautier Marie 
Published: May 2021

AbstractThis article uses a context of increasing institutional demand to be geographically mobile to examine how early-career researchers move across borders. I explore the case of Swiss academia, a particularly competitive and attractive environment with the highest levels of inbound and outbound mobility in Europe. In line with the aims of the European Research Area, an EU programme created in 2000 to foster a pan-European academic labour market, Switzerland funds scientific mobility and promotes extended research trips abroad as tools to boost collaboration and research excellence. Therefore, Swiss institutions have valued mobility for professional and personal development. In the meantime, they have raised concerns about female academics not being mobile and the potential consequences of their local family ties on career inequalities. In this study, I explore how early-career researchers experience mobility and how their personal accounts challenge institutional definitions of being mobile or immobile. I draw on a qualitative analysis of 65 semi-structured interviews conducted for two EU research projects on early-career academics from various backgrounds. I show how empirical data question the traditional—and often gendered—mobile/immobile dichotomy. I also highlight how mobility practices are normalised by the interviewees. Moreover, using the concept of stickiness, I describe a subtle range of sticky-to-stretchy mobility experiences influenced by both structural and individual factors. Finally, through the figure of the geoccasional worker, I question romanticised visions of mobility and stress the need to reconsider mobility as a (gendered) precarity issue rather than as a female problem.
Where are we in 2021 with heart failure with reduced ejection fraction?—current outlook and expectations from new promising clinical trials
Authors: Dębska-Kozłowska Agnieszka , Książczyk Marcin , Lelonek Małgorzata 
Published: May 2021

AbstractGuideline-directed optimal medical therapy is a well-established therapy in treating patients with heart failure with reduced ejection fraction (HFrEF). Despite clear recommendations, the prognosis in this group of patients is still poor with high mortality. After publishing results of the PARADIGM-HF trial (Prospective Comparison of ARNI—Angiotensin Receptor/Neprilysin Inhibitors—with ACEI—Angiotensin-Converting Enzyme Inhibitor—to Determine Impact on Global Mortality and Morbidity in Heart Failure) clinical investigators accelerated their research. Recently, many new trials have been designed to evaluate the efficacy and safety of promising management, taking into account heterogeneity of population with chronic HFrEF. Determining target doses still poses the biggest problem in standard pharmacotherapy. Implementation of new substances for the HFrEF therapy makes it possible to formulate simple rules of treatment—in most cases, administering a dose of drug in one tablet provides a faster therapeutic effect. The aim of this article is to summarize current knowledge on recently announced findings on novel molecules and to propose a new revolutionary and individualised approach to treatment of HFrEF patients.
Bridging the gap between research and practice: using phenomenographic findings to develop training for career practitioners
Authors: Kettunen Jaana , Tynjälä Päivi 
Published: May 2021

AbstractThis study contends that phenomenography offers both a useful research method and practical tools for developing education and training for career practitioners. After introducing the basic principles of phenomenography, the study reviews previous research on its potential in developing pedagogical practices. It explores how the phenomenographic findings were utilized to design an online skills training programme for career practitioners. The study finds that phenomenographic research serves three practical pedagogical purposes: (1) revealing how learners understand certain concepts or phenomena, (2) elucidating how these understandings differ; and (3) identifying critical aspects in helping learners to widen and deepen their understanding.
Employees Receiving Inpatient Treatment for Common Mental Disorders in Germany: Factors Associated with Time to First and Full Return to Work
Authors: Sikora Alexandra , Schneider Gundolf , Wegewitz Uta , Bültmann Ute 
Published: May 2021

AbstractPurpose In Germany, return to work (RTW) after inpatient treatment for common mental disorders (CMDs) is a complex process at the intersection of the mental healthcare system and the workplace. This study examined (1) the time to first and full RTW and (2) associated factors among employees receiving inpatient treatment for CMDs. Methods In this prospective cohort study, employees receiving inpatient psychiatric or medical rehabilitation treatment for CMDs were interviewed by phone during their last week before discharge. Follow-up interviews were conducted after 6, 12, and 18 months. Health-, personal, and work-related factors were used from baseline measurement. Parametric survival analysis was conducted to identify factors associated with time to first and full RTW. Results A total of N = 269 participants who stayed at a psychiatric clinic or a medical rehabilitation facility were included. Almost all participants (n = 252, 94%) from both treatment settings reported a first RTW and a full RTW. The time to first and full RTW was shortest among participants from medical rehabilitation (both median 6 days) and longer among participants from psychiatric treatment (median 17 days to first RTW and 73 days to full RTW). While only health-related and personal factors were associated with time to first RTW, leadership quality and needed individual RTW support were associated with time to full RTW. Conclusions More attention to work accommodation needs for RTW in clinical practice and coordinated actions towards RTW in collaboration with key RTW stakeholders in the workplace may support a timely RTW.Clinical Registration Number DRKS00010903, retrospectively registered.
The Link Between COVID-19, Anxiety, and Religious Beliefs in the United States and the United Kingdom
Authors: Rigoli Francesco 
Published: May 2021

AbstractResearch has shown that stress impacts on people’s religious beliefs. However, several aspects of this effect remain poorly understood, for example regarding the role of prior religiosity and stress-induced anxiety. This paper explores these aspects in the context of the recent coronavirus pandemic (COVID-19). The latter has impacted dramatically on many people’s well-being; hence it can be considered a highly stressful event. Through online questionnaires administered to UK (n = 140) and USA (n = 140) citizens professing either Christian faith or no religion, this paper examines the impact of the coronavirus crisis upon common people’s religious beliefs. Anxiety about the coronavirus and prior religiosity showed an interaction effect upon change in religious beliefs (t(276) = 2.27,p = .024): for strong believers higher anxiety about coronavirus was associated with increased strengthening of religious beliefs (r = .249), while for non-believers higher anxiety about coronavirus was associated with increased scepticism towards religious beliefs (r = − .157). These observations are consistent with the notion that stress-induced anxiety enhances support for an individual’s existing ideology already embraced before a stressful event occurs. This study sheds light on the psychological and cultural implications of the coronavirus crisis, which represents one of the most serious health emergencies in recent times.