bluuebunny/crossref_metadata_2025_split huggingface dataset:
Transformations: the material representation of historical experiments in science teaching
Authors: Heering Peter 
Published: August 2023

AbstractSome experiments from the history of physics became so famous that they not only made it into the textbook canon but were transformed into lecture demonstration performances and student laboratory activities in the nineteenth and twentieth centuries. While, at first glance, some of these demonstrations as well as the related instruments do resemble their historical ancestors, a closer examination reveals significant differences both in the instruments themselves and in the practices and meanings associated with them. In this paper, I analyse the relation between the research instruments and the respective teaching demonstrations. In doing so, I particularly distinguish between demonstrations that address the process of the actual experimental procedures, and those that focus on the outcome or results (the product) of the experiment. This distinction will be illustrated in some exemplary case studies from the late nineteenth century and the early twentieth in which both the historical experiment and the related educational devices are analysed. The tension between the historical experiment on the one hand, and the different variants of the teaching version on the other, result in the educational as well as epistemological problems that are discussed in this paper.
Composition and diversity of bacterial communities associated with honey bee foragers from two contrasting environments
Authors: Lazarova Stela , Lozanova Lyudmila , Neov Boyko , Shumkova Rositsa , Balkanska Ralitsa , Palova Nadezhda , Salkova Delka , Radoslavov Georgi , Hristov Peter 
Published: August 2023

AbstractThe honey bee is associated with a diverse community of microbes (viruses, bacteria, fungi, and protists), commonly known as the microbiome. Here, we present data on honey bee microbiota from two localities having different surrounding landscapes – mountain (the Rhodope Mountains) and lowland (the Danube plain). The bacterial communities of abdomen of adult bees were studied using amplicon sequencing of the 16S rRNA gene. The composition and dominance structure and their variability within and between localities, alpha and beta diversity, and core and differential taxa were compared at different hierarchical levels (operational taxonomic units to phylum). Seven genera (Lactobacillus, Gilliamella, Bifidobacterium, Commensalibacter, Bartonella, Snodgrassella, and Frischella), known to include core gut-associated phylotypes or species clusters, dominated (92–100%) the bacterial assemblages. Significant variations were found in taxa distribution across both geographical regions and within each apiary. Lactobacillus (Firmicutes) prevailed significantly in the mountain locality followed by Gilliamella and Bartonella (Proteobacteria). Bacteria of four genera, core (Bartonella and Lactobacillus) and non-core (Pseudomonas and Morganella), dominated the bee-associated assemblages of the Danube plain locality. Several ubiquitous bacterial genera (e.g., Klebsiella, Serratia, and Providencia), some species known also as potential and opportunistic bee pathogens, had been found in the lowland locality. Beta diversity analyses confirmed the observed differences in the bacterial communities from both localities. The occurrence of non-core taxa contributes substantially to higher microbial richness and diversity in bees from the Danube plain locality. We assume that the observed differences in the microbiota of honey bees from both apiaries are due to a combination of factors specific for each region. The surrounding landscape features of both localities and related vegetation, anthropogenic impact and land use intensity, the beekeeping management practices, and bee health status might all contribute to observed differences in bee microbiota traits.
On the density of bounded bases
Authors: Fang Jin-Hui 
Published: August 2023

AbstractFor a nonempty set A of integers and an integer n, let $r_{A}(n)$ be the number of representations of n in the form $n=a+a'$, where $a\leqslant a'$ and $a, a'\in A$, and $d_{A}(n)$ be the number of representations of n in the form $n=a-a'$, where $a, a'\in A$. The binary support of a positive integer n is defined as the subset S(n) of nonnegative integers consisting of the exponents in the binary expansion of n, i.e., $n=\sum_{i\in S(n)} 2^i$, $S(-n)=-S(n)$ and $S(0)=\emptyset$. For real number x, let $A(-x,x)$ be the number of elements $a\in A$ with $-x\leqslant a\leqslant x$. The famous Erdős-Turán Conjecture states that if A is a set of positive integers such that $r_A(n)\geqslant 1$ for all sufficiently large n, then $\limsup_{n\rightarrow\infty}r_A(n)=\infty$. In 2004, Nešetřil and Serra initially introduced the notation of “bounded” property and confirmed the Erdős-Turán conjecture for a class of bounded bases. They also proved that, there exists a set A of integers satisfying $r_A(n)=1$ for all integers n and $|S(x)\bigcup S(y)|\leqslant 4|S(x+y)|$ for $x,y\in A$. On the other hand, Nathanson proved that there exists a set A of integers such that $r_A(n)=1$ for all integers n and $2\log x/\log 5+c_1\leqslant A(-x,x)\leqslant 2\log x/\log 3+c_2$ for all $x\geqslant 1$, where $c_1,c_2$ are absolute constants. In this paper, following these results, we prove that, there exists a set A of integers such that: $r_A(n)=1$ for all integers n and $d_A(n)=1$ for all positive integers n, $|S(x)\bigcup S(y)|\leqslant 4|S(x+y)|$ for $x,y\in A$ and $A(-x,x) \gt (4/\log 5)\log\log x+c$ for all $x\geqslant 1$, where c is an absolute constant. Furthermore, we also construct a family of arbitrarily spare such sets A.
Well-being and the Problem of Unstable Desires
Authors: Mariqueo-Russell Atus 
Published: August 2023

AbstractThis paper considers a new problem for desire theories of well-being. The problem claims that these theories are implausible because they misvalue the effects of fleeting desires, long-standing desires, and fluctuations in desire strength on well-being. I begin by investigating a version of the desire theory of well-being, simple concurrentism, that fails to capture intuitions in these cases. I then argue that desire theories of well-being that are suitably stability-adjusted can avoid this problem. These theories claim that the average strength of a desire, and the length of time that it is held, both influence the extent to which its fulfilment or frustration affects well-being. I end by considering whether value-fulfilment theories of well-being have a more attractive response to this problem. I find that these theories have significant downsides that make them unappealing alternatives.
Why do we say them when we know it should be they? Twitter as a resource for investigating nonstandard syntactic variation in The Netherlands
Authors: Grondelaers Stefan , van Hout Roeland , van Halteren Hans , Veerbeek Esther 
Published: August 2023

AbstractTwo Twitter-based corpus studies are reported to account for the increasing preference in The Netherlands for the stigmatized subject use of the object pronoun hun ‘them.’ Twitter data were collected to obtain a sufficient number of hun-tokens, but also to investigate the validity of two hypotheses on the preference for hun, this is, that subject-hun is a contrast profiler which thrives in contexts of evaluation and qualification, and that subject-hun is propelled by its dynamic social meaning, being a tool for nonposh and streetwise self-stylization. Although the latter is not normally a predictor included in regression analyses of constructional choice, it turns out that expressively spruced up tweets with vivid contrast profiling are the prime biotope of subject-hun. Along the way, this paper reviews the potential of Twitter data for the reconciliation of macro-big-data analysis with micro-sociolinguistic focus, but it also reports and attempts to remedy three concerns.
Mobile Medical Teams are Often Over-Qualified
Authors: Van Biesen Sofie-An , Devue Katleen , Van Laere Sven , De Leeuw Kathleen , Hubloue Ives , Bierens Joost 
Published: August 2023

AbstractBackground and Importance:Emergency department (ED) staff in Belgium is simultaneously involved in patient care in the ED and in prehospital interventions as part of a Mobile Medical Team (MMT) or a Paramedic Intervention Team (PIT). There is a growing concern that the MMT is often over-qualified for the prehospital interventions they are dispatched to, while their absence from the ED results in insufficient human resources there.Objective:The current study aims to investigate whether this perception is correct in the EDs of two different regions, while also examining the differences between a two-tiered (2T) and a three-tiered (3T) Emergency Medical Services (EMS) region.Methods:A specially developed and pre-tested registration form was completed by physicians and nurses before and after each MMT intervention. The form included information on the composition of the MMT, the perceived need for MMT intervention pre-departure from the ED, the subjective appreciation of the need for the MMT after an intervention, and the therapeutic intervention(s) performed, in order to obtain a more objective appreciation of the actual need for an MMT. Data from a 2T and a 3T region were analyzed to rate the appropriateness of the interventions.Results:Although the 2T and 3T regions showed differences regarding MMT composition, dispatching, and logistics, the outcome of the study was identical in both regions. Before the intervention, physicians and nurses estimated that the MMT intervention would not be necessary in 37.7% of cases. However, following the intervention, it was subjectively deemed unnecessary in 65.7% of cases. Based on therapeutic interventions performed, the MMT was viewed as being over-qualified for carrying these out in 85.6% of cases. Post-intervention, the initial prediction that the MMT was over-qualified for the call was confirmed by the same physicians and nurses in 87.6% of cases, whilst their prediction was correct in 92.8% of cases in terms of the intervention that was carried out.Conclusion:In two different Belgian regions, the MMT is over-qualified in a vast majority of interventions. Physicians and nurses within the MMT can generally already predict that the MMT is over-qualified when leaving the ED. These findings suggest that there may be significant opportunities to improve the efficacy of human resources in the ED once there are less interventions carried out by an over-qualified MMT.
Participation in the Georgia Food for Health programme and CVD risk factors: a longitudinal observational study
Authors: Cook Miranda Alonna , Taylor Kathy , Reasoner Tammy , Moore Sarah , Mooney Katie , Tran Cecilia , Barbo Carli , Schmidt Stacie , Stein Aryeh D , Webb Girard Amy 
Published: August 2023

AbstractObjective:To assess the relationship between programme attendance in a produce prescription (PRx) programme and changes in cardiovascular risk factors.Design:The Georgia Food for Health (GF4H) programme provided six monthly nutrition education sessions, six weekly cooking classes and weekly produce vouchers. Participants became programme graduates attending at least 4 of the 6 of both the weekly cooking classes and monthly education sessions. We used a longitudinal, single-arm approach to estimate the association between the number of monthly programme visits attended and changes in health indicators.Setting:GF4H was implemented in partnership with a large safety-net health system in Atlanta, GA.Participants:Three hundred thirty-one participants living with or at-risk of chronic disease and food insecurity were recruited from primary care clinics. Over three years, 282 participants graduated from the programme.Results:After adjusting for programme site, year, participant sex, age, race and ethnicity, Supplemental Nutrition Assistance Program participation and household size, we estimated that each additional programme visit attended beyond four visits was associated with a 0·06 kg/m2 reduction in BMI (95 % CI –0·12, –0·01; P = 0·02), a 0·37 inch reduction in waist circumference (95 % CI –0·48, –0·27; P < 0·001), a 1·01 mmHg reduction in systolic blood pressure (95 % CI –1·45, –0·57; P < 0·001) and a 0·43 mmHg reduction in diastolic blood pressure (95 % CI –0·69, –0·17; P = 0·001).Conclusions:Each additional cooking and nutrition education visit attended beyond the graduation threshold was associated with modest but significant improvements in CVD risk factors, suggesting that increased engagement in educational components of a PRx programme improves health outcomes.
Jesuits as Petitioners: Antonio Ruiz de Montoya and the Issue of Indigenous Slavery in the Early Seventeenth-Century South Atlantic
Authors: Lopes de Carvalho Francismar Alex 
Published: August 2023

AbstractIn the Spanish monarchy, corporations, religious orders, and other petitioners kept procurators in Madrid to lobby the royal councils on their behalf. Drawing on an efficient network of information, the Madrid-based Jesuit procurators were known for their insistence on solving the financial and personnel needs of several missions throughout the New World. This article analyzes a series of petitions composed by Antonio Ruiz de Montoya in the late 1630s on behalf of Jesuit missions in Paraguay. These missions had been harassed by Portuguese slavers, who captured tens of thousands of natives in this region. Ruiz de Montoya's petitions reveal that the Jesuits’ lobbying actions had a much greater impact than has been assumed. Far from confining themselves to asking for material and human resources for the missions, the Jesuits proposed that the Spanish crown make a large-scale intervention in the administration of Portuguese domains in the South Atlantic, a program that Madrid would have implemented were it not for Portuguese independence in 1640.
Why Indigenous Slavery Continued in Spanish America after the New Laws of 1542
Authors: van Deusen Nancy E. 
Published: August 2023

AbstractA prevailing idea in the scholarly literature is that the New Laws of 1542 outlawed the enslavement of indios (Indigenous people of the Spanish Indies, a category invented by Europeans) in Spanish America. Many see the enactment of this legislation as emblematic of the Spanish crown's exertion of imperial authority over the conquerors who had caused irreparable damage to the Indigenous peoples of the Americas. This article contests this prevailing narrative. It explores how and why the Council of the Indies (the governing council of the Spanish possessions, reporting directly to the king), the Spanish king, and viceroys (or audiencias with viceregal approval) mandated Indigenous slavery for life or for a temporary period. Mandates affected at least 15 Indigenous groups in at least ten locations throughout the Spanish-occupied Western Hemisphere in the seven decades following the passage of the New Laws. I focus on this period to explain the conditions, rationales, legal channels, and procedures used by vassals and local and imperial authorities to authorize the enslavement of targeted Indigenous peoples.
Performance of the WRF Model at the Convection‐Permitting Scale in Simulating Snowfall and Lake‐Effect Snow Over the Tibetan Plateau
Authors: Lin Qian , Chen Jie , Ou Tinghai , Lai Hui‐Wen , Prein Andreas F. , Chen Deliang 
Published: August 2023

AbstractThis study investigated the performance of the Weather Research Forecasting (WRF) model at 4‐km horizontal grid spacing in simulating precipitation, 2 m air temperature (T2), snowfall, and lake‐effect snow (October 4–8, 2018) over the Tibetan Plateau (TP). Multiple simulations with different physical parameterization schemes (PPSs), including two planetary boundary layer schemes (Yonsei University and Mellor–Yamada–Janjic), no cumulus and multi‐scale Kain‐Fritsch, two land surface models (Noah and Noah‐MP), and two microphysics schemes (Thompson and Milbrandt), were conducted and compared. Compared with gauge observations, all PPSs simulate mean daily precipitation with mean relative errors (MREs) of 27.7%–53.6%. Besides, spatial correlation coefficients (SCCs) between simulated and observed mean daily precipitation range from 0.56 to 0.71. For simulations of T2, all PPSs perform similarly well, even though the mean cold biases are up to about 3°C. Meanwhile, all PPSs exhibit acceptable performance in simulating spatial distributions of snow depth, snow cover, and snowfall amount, with SCCs of 0.37–0.65 between simulations and observations. However, the WRF simulations significantly overestimate snow depth (∼0.4 cm mean error) and snowfall amount (MREs >372%). The Milbrandt scheme slightly outperforms the other PPSs in simulating snow‐related variable magnitudes. Due to their inaccurate temperature and airflow modeling over the lake surface and its surroundings, none of the WRF simulations well reproduce the characteristics that more snow occurs over the lake and downwind area. Overall, this study provides a useful reference for future convection‐permitting climate modeling of snow or other extreme events when using the WRF model in the TP and other alpine regions.
Scale‐Dependent Estimability of Turbulent Flux in the Unstable Surface Layer for Land Surface Modeling
Authors: Liu Shaofeng , Zeng Xubin , Dai Yongjiu , Yuan Hua , Wei Nan , Wei Zhongwang , Lu Xingjie , Zhang Shupeng , Li Xian‐Xiang 
Published: August 2023

AbstractSurface flux estimation is essential to land surface modeling in earth system models. In practice, parameterizations of surface turbulent fluxes are almost all based on the similarity theory. That is, the grid or subgrid mean surface‐layer flow is assumed at equilibrium with the underlying earth surface, and therefore some empirical relations can be used to estimate surface fluxes. In this paper, scale‐dependent estimability of turbulent flux in the unstable surface layer is systematically investigated based on high‐resolution large‐eddy simulation data over a flat and homogeneous domain, representing a typical land surface modeling grid. It is found that turbulent flow in the unstable surface layer inherently fluctuates over a wide range of scales. This kind of fluctuation affects the steady‐state relations between mean atmospheric quantities and underlying earth surface, and hence affects the estimability of surface fluxes. Sensitivity tests show that the relative root mean square error of the estimated surface friction velocity for a subdomain generally increases as the subdomain becomes smaller. The error can be as high as 35% as the subdomain size decreases to the order of the surface layer height. To achieve an error of 10% for all cases, the subdomain size should be at least on the order of the boundary layer height. These findings imply that estimability‐based strategies may be needed for representing subgrid heterogeneity for surface flux estimation in land surface modeling.
Optimizing Ocean Bottom Seismometers for Shallow Water Using Shielding and Horizontal Pressure Gradient Data
Authors: Webb Spahr C. , Barclay Andrew H. 
Published: August 2023

AbstractWe show large “shields” can significantly reduce horizontal component noise levels for ocean bottom seismometers by shielding the seismic sensors from shaking due to ocean currents. However, at short period (<1 s) some noise from vibration or rocking of the shield under current can partly couple through the ground causing peaks in the noise spectra. Deformation of the seafloor under ocean wave loading (“compliance”) raises noise levels at long period (>5 s) for both vertical and horizontal components at shallow water sites. Pressure gauge data is now routinely used to predict and remove this source of noise on vertical component data. We have developed horizontal pressure gradient (HPG) gauges to measure and remove this source of noise from horizontal component data. The combination of HPG data and shielding enables low noise long period seismic observations at otherwise very noisy shallow seafloor sites.
Compounding of Sea‐Level Processes During High‐Tide Flooding Along the U.S. Coastline
Authors: Li Sida , Wahl Thomas , Piecuch Christopher , Dangendorf Sönke , Thompson Philip , Enríquez Alejandra , Liu Lintao 
Published: August 2023

AbstractHigh‐tide flooding (HTF) is usually generated by a variety of different processes acting at different temporal scales across different geographic regions, but little is known about the role of interactions between those. We assess the role of compounding effects arising from cross‐covariances between different sea‐level components in generating HTF events along the US coastline. Our results show that compounding effects contribute to both HTF frequencies and magnitudes. The US Gulf and northwest coasts exhibit particularly high potential for compound HTF. Long‐term sea‐level rise is the main driver of accelerated HTF frequencies along the US coastline. However, even in the absence of sea‐level rise, changes in compounding effects due to increased or decreased cross‐covariances between sea‐level components associated with climate variability and change also modulate compound HTF. Our results highlight the importance of adequately modeling compounding effects between sea‐level components when generating future projections of HTF.
Antarctic Bottom Water in the Vema Fracture Zone
Authors: Morozov E. G. , Frey D. I. , Zuev O. A. , Makarenko N. I. , Seliverstova A. M. , Mekhova O. S. , Krechik V. A. 
Published: August 2023

AbstractA section of 46 CTD/Lowered Acoustic Doppler Current Profiler stations along the Vema Fracture Zone (VFZ) was made for the first time with a repeat of the transverse section on the main sill (at 41° W) for the sixth time. Potential temperature of Antarctic Bottom Water when it flows into the fracture increases from 1.3°С to 1.6°C. This temperature increase is much smaller than in the Romanche Fracture Zone because in the VFZ there are not many transverse sills that force the flow to become turbulent. A zone with minimal velocities of the bottom flows exists in the western part of the VFZ up to the main sill. A current with velocities of 0.25 m/s flows above the low velocity zone at a depth of about 4,000 m. Underwater spillways with hydraulically controlled flow of bottom water down the slope from 4,500 m to 5,000 m at speeds up to 0.40 m/s were found east of the sill (in the central and southern channels). The bottom current accelerates as it flows down, but then its kinetic energy decreases. The bottom current slows down and mixes with surrounding waters. A thin (∼30 m) bottom flow descends further to the deep depression. In the southern channel of the VFZ, bottom water flows into a deep (5,400 m) basin. The coldest and densest water reaches this depression during rare inflows.