bluuebunny/crossref_metadata_2025_split huggingface dataset:
Broadening participation in STEM through equity-minded high-impact practices: a multimodal systematic review
Authors: Ives Jillian , Falk Joni , Drayton Brian 
Published: December 2023

AbstractHigh-impact practices (HIPs), such as undergraduate research, first-year seminars, and learning communities, have been shown to generally advance college student success. However, there are often disparities in access, participation, and outcomes between white and racially/ethnically minoritized students. While scholars have critiqued HIPs and provided alternative approaches to better serve minoritized students, we know little about how federally funded programs aiming to broaden participation can serve as a mechanism advance equity. Drawing on the literature, we developed an equity-minded HIP framework to critically examine the prominence and characteristics of 38 programs aiming to broaden participation in undergraduate US STEM education funded by the National Science Foundation. We conducted a systematic examination of multimodal data from the STEM for All Multiplex repository. Findings reveal most programs included only one to two HIPs, with undergraduate research being most prominent followed by internships. Most programs included only a few elements of equity-minded design, such as providing students additional resources and faculty training, and implemented HIPs to include peer and faculty interactions. Last, most programs utilized cognitive, psychosocial, or sociocultural measures to assess the benefits to students. Only a few measured equity-mined outcomes pertaining to institutional change such as policies, resources, and practices. We highlight two exemplar programs and offer recommendations for researchers and funders to more effectively implement equity-minded HIPs to broaden participation in undergraduate STEM education.
The Effect of Physical and Virtual Inquiry-Based Experiments on Students’ Attitudes and Learning
Authors: Papalazarou Nikolaos , Lefkos Ioannis , Fachantidis Nikolaos 
Published: December 2023

AbstractInvolving students in laboratory and inquiry-based activities can help them understand the concepts of physics. However the learning process should not only focus on the concepts. Moreover, the advantages of using virtual or physical labs are still under examination. The purpose of this study is to analyse which of the two modes (virtual or physical) is the most effective for high-school students, in terms of conceptual understanding and attitudes. The criteria for this comparison are (a) the contribution of these two modes to the improvement of conceptual understanding and (b) the students’ attitudes towards both modes of laboratory. The participants were high-school students of 3rd grade in two different groups. For the purpose of the study, four educational scenarios were created: two in the field of Mechanics and two in that of Electricity. The study revealed no statistically significant difference regarding students’ experimenting in either lab mode. Moreover, students’ attitudes towards both virtual and physical labs were similarly positive. We assume that these results may contribute to a broader perspective on choosing the lab mode when designing activities, given the fact that both the understanding and attitudes of the students are similar in the cases examined. Thus, the final choice of modality should be based on other factors, such as the adequacy of equipment, the educational conditions (e.g. distance education) and the specific learning goals set by the teacher.
An extended 2D Gao beam model
Authors: Dyniewicz Bartłomiej , Shillor Meir , Bajer Czesław I. 
Published: December 2023

AbstractThis work derives and simulates a two-dimensional extension of the nonlinear Gao beam, by adding the cross-sectional shear variable, similarly to the extension of the usual Bernoulli–Euler beam into the Timoshenko beam. The model allows for oscillatory motion about a buckled state, as well as adds vertical shear of the cross sections, thus reflecting better nonlinear thick beams. The static model is derived from the principle of virtual elastic energy, and is in the form of a highly nonlinear coupled system for the beams transverse vibrations and the motion of the cross sections. The model allows for general distributive transversal and longitudinal loads and a compressive horizontal load acting on its edges. The model is simulated numerically, using the dynamic version for better insight into the steady solutions. The terms that distinguish our numerical solutions from the solutions of the Gao beam, described in the literature, are highlighted. The numerical scheme and its characteristic finite element matrices allow us to obtain simulation results that demonstrate the type of vibrations of our extended and modified beam, and also the differences between these solutions and those of the Gao beam model.
Numerous insertions of mitochondrial DNA in the genome of the northern mole vole, Ellobius talpinus
Authors: Kuprina Kristina , Smorkatcheva Antonina , Rudyk Anna , Galkina Svetlana 
Published: December 2023

Abstract

Background

Ellobius talpinus is a subterranean rodent representing an attractive model in population ecology studies due to its highly special lifestyle and sociality. In such studies, mitochondrial DNA (mtDNA) is widely used. However, if nuclear copies of mtDNA, aka NUMTs, are present, they may co-amplify with the target mtDNA fragment, generating misleading results. The aim of this study was to determine whether NUMTs are present in E. talpinus.

Methods and results
PCR amplification of the putative mtDNA CytB-D-loop fragment using ‘universal’ primers from 56 E. talpinus samples produced multiple double peaks in 90% of the sequencing chromatograms. To reveal NUMTs, molecular cloning and sequencing of PCR products of three specimens was conducted, followed by phylogenetic analysis. The pseudogene nature of three out of the seven detected haplotypes was confirmed by their basal positions in relation to other Ellobius haplotypes in the phylogenetic tree. Additionally, ‘haplotype B’ was basal in relation to other E. talpinus haplotypes and found present in very distant sampling sites. BLASTN search revealed 195 NUMTs in the E. talpinus nuclear genome, including fragments of all four PCR amplified pseudogenes. Although the majority of the NUMTs studied were short, the entire mtDNA had copies in the nuclear genome. The most numerous NUMTs were found for rrnL, COXI, and D-loop.

Conclusions
Numerous NUMTs are present in E. talpinus and can be difficult to discriminate against mtDNA sequences. Thus, in future population or phylogenetic studies in E. talpinus, the possibility of cryptic NUMTs amplification should always be taken into account.
Spin-outs’ knowledge legacies and parent hostility: a competitive dynamics view
Authors: Walter Sascha G. 
Published: December 2023

Abstract
This study adopts a competitive dynamics perspective to illuminate how and when different types of knowledge transferred by a spin-out trigger parent hostility. Specifically, I propose based on the awareness-motivation-capability framework that (1) transfers of market-related and technology-related knowledge will yield hostility and that (2) market commonality, resource similarity, and competitive intensity will exacerbate this effect. Findings from 207 spin-outs support several of my hypotheses. The study contributes to the extant literature by providing a more nuanced view on knowledge legacies, in particular regarding their interplay with a spin-out’s competitive positioning.
Printability and hardening performance of three-dimensionally-printed geopolymer based on lunar regolith simulant for automated construction of lunar infrastructure
Authors: Li Feng , Zhang Rongrong , Zhou Siqi , Zhu Xingyi 
Published: December 2023

AbstractUsing an in situ lunar regolith as a construction material in combination with 3D printing not only reduces the weight of materials carried from the Earth but also improves the automation of lunar infrastructure construction. This study aims to improve the printability of a geopolymer based on a BH-1 lunar regolith simulant, including the extrudability, open time, and buildability, by controlling the temperature and adding admixtures. Rheological parameters were used to represent printability with different water-to-binder ratios, printing temperatures, and contents of additives. The mechanical properties of the hardening geopolymer with different filling paths and loading directions were tested. The results show that heating the printed filaments with a water-to-binder ratio of 0.32 at 80 °C can adjust the printability without adding any additive, which can reduce the construction cost of lunar infrastructure. The printability of the BH-1 geopolymer can also be improved by adding 0.3% Attagel-50 and 0.5% polypropylene fiber by mass at a temperature of 20 °C to cope with the changeable environmental conditions on the Moon. After curing under a simulated lunar environment, the 72-h flexural and compressive strengths of the geopolymer specimens reach 4.1 and 48.1 MPa, respectively, which are promising considering that the acceleration of gravity on the Moon is 1/6 of that on the Earth.
Experimental determination of the strength of toughened glass in the area of near-edge holes
Authors: Efferz Lena , Schuler Christian , Siebert Geralt 
Published: December 2023

AbstractFor tempered glass, edge distances for drilled holes in point-fixed glazing must be observed. For production reasons, the European product standard EN 12150 for thermally toughened safety glass requires a minimum edge distance of two times the thickness t. When transferring loads from the glass pane, it is necessary to consider whether and to what extent residual stresses of the tempering process are present in the remaining area between the edge and the hole. The German design standard DIN 18008-3 specifies a blanket distance to the edge of 80 mm for cylindrical holes, which is frequently undercut in construction practice. In this case, the strength of the tempered glass used may not be applied for structural analysis, and only the strength of annealed glass may be assumed instead. Because of this discrepancy, this study experimentally investigated the strength behavior of toughened glass with cylindrical near-edge holes via photoelasticity and destroying four-point bending test. The pre-stress zones of a glass pane are qualitatively compared using the monochrome wavelength photoelasticity method, and the surface compressive stress is measured at points near the hole. Then, the fracture stress of the drilled specimen is determined by four-point bending tests and the necessary numerical simulation using the finite element method of the bending test. The various test methods are intended to provide information on the distribution of the residual stresses and thus on the strength of the toughened glass when the edge distance is lower than the distance required in DIN 18008-3—and by this update the rules.
Institutional change in community-based management for organic labeling: a case study from a Participatory Guarantee System in France
Authors: Dorville Claire , Lemeilleur Sylvaine 
Published: December 2023

AbstractThis paper investigates how the process of institutional change shapes community-based organizations, by considering both formal and informal governance rules over several different periods. For this purpose, we examine how the community-based management of organic farming has changed in the past five decades. The French association, Nature & Progrès (N&P), adopted a “Participatory Guarantee System” (PGS) to monitor compliance with their organic standard, created in 1972. Yet, following the European regulation “Organic Agriculture” enforced in 1995, N&P was excluded from the public policy framework for organic farming, which was reserved for operators that were certified by a third party. Ostrom and Basurto’s (Journal of Institutional Economics, 7(3), 3, 2011) analytical tool is useful to describe the changes in collective rules. Drawing on original data collected from N&P, we examine how institutional changes in the European legislation have affected the governance of a community-based certification scheme. We focus on prescriptions that rely on internal or external sanction mechanisms and discuss the implications for enforcement. Our results show that the N&P structure has become an institutionalized PGS. N&P members have managed to build a complex governance system to certify organic products despite the European restriction on access to the organic label. However, the conformity system used by local groups is largely based on unwritten norms, which can cause confusion and conflicts between users, especially since PGS communities are “evolving communities.”
LEBESGUE MEASURE ZERO MODULO IDEALS ON THE NATURAL NUMBERS
Authors: GAVALOVÁ VIERA , MEJÍA DIEGO A. 
Published: December 2023

Abstract
We propose a reformulation of the ideal

$\mathcal {N}$

of Lebesgue measure zero sets of reals modulo an ideal J on

$\omega $

, which we denote by

$\mathcal {N}_J$

. In the same way, we reformulate the ideal

$\mathcal {E}$

generated by

$F_\sigma $

measure zero sets of reals modulo J, which we denote by

$\mathcal {N}^*_J$

. We show that these are

$\sigma $

-ideals and that

$\mathcal {N}_J=\mathcal {N}$

iff J has the Baire property, which in turn is equivalent to

$\mathcal {N}^*_J=\mathcal {E}$

. Moreover, we prove that

$\mathcal {N}_J$

does not contain co-meager sets and

$\mathcal {N}^*_J$

contains non-meager sets when J does not have the Baire property. We also prove a deep connection between these ideals modulo J and the notion of nearly coherence of filters (or ideals).
We also study the cardinal characteristics associated with

$\mathcal {N}_J$

and

$\mathcal {N}^*_J$

. We show their position with respect to Cichoń’s diagram and prove consistency results in connection with other very classical cardinal characteristics of the continuum, leaving just very few open questions. To achieve this, we discovered a new characterization of

$\mathrm {add}(\mathcal {N})$

and

$\mathrm {cof}(\mathcal {N})$

. We also show that, in Cohen model, we can obtain many different values to the cardinal characteristics associated with our new ideals.
A Simulation of Snow on Antarctic Sea Ice Based on Satellite Data and Climate Reanalyses
Authors: Lawrence Isobel R. , Ridout Andrew L. , Shepherd Andrew , Tilling Rachel 
Published: December 2023

AbstractAlthough snow plays an important role in the energy and mass balance of sea ice, it is little studied in the Southern Ocean. We present a Lagrangian model of snow on sea ice, CASSIS, that simulates the daily creation and drift of floes. Drifting floes accumulate snow from the atmosphere and the Antarctic ice sheet, and lose snow to the ocean and snow‐ice formation. The depth of snow on Southern Ocean sea ice increases in all sectors between autumn and spring 1981–2021, reaching 40 cm in much of the Weddell Sea, coastal Amundsen Sea and south east Indian Ocean. The root mean square difference between seasonally‐averaged model and ship‐based snow depths is 13.1 cm, and between modeled and airborne snow depths from Operation IceBridge is 13.5 cm. Our model offers an alternative long‐term snow depth record to that from passive microwave (PM) radiometry, which does not capture the seasonal growth of the snow cover. We find that although the average circumpolar snow layer thickness has increased by 16 mm between 1981 and 2021 (P = 0.004), there has been a decrease of 13 mm in the Southern Pacific Ocean (P = 0.133, but significant in spring and autumn), driven by a reduction of summer sea ice extent in this region. Our model paves the way for improved satellite‐based estimates of Antarctic sea ice thickness.
Resolving Some Longstanding Issues in Far Ultraviolet Remote Sensing: A Self‐Consistent Analysis of the GUVI and SEE Observations on the TIMED Mission
Authors: Qin Jianqi 
Published: December 2023

AbstractFar Ultraviolet (FUV) remote sensing has been used in aeronomy missions as a powerful means to measure the temperature and compositions in the upper atmospheres of terrestrial planets. However, despite decades of continual development, outstanding challenges remain in this field. Particularly, there is currently a lack of methods for the examination and improvement of the data products in FUV remote sensing. As a result, longstanding issues exist in many of those data products. Here we demonstrate that a self‐consistent analysis of multi‐band airglow observations in the spectral range of ∼120–180 nm can serve as a useful means for examination and improvement of the data products in FUV remote sensing. The Global Ultraviolet Imager (GUVI) and Solar EUV Experiment (SEE) observations on the Thermosphere Ionosphere Mesosphere Energetics and Dynamics mission are used for the demonstration. Through a self‐consistent analysis, we reconcile the thermospheric column O/N2 density ratios that are retrieved respectively from the GUVI limb and disk scans, by numerically correcting a systematic offset between those observations. We also reconcile the models with the observed 121.6 and 130.4 nm emission that have shown large discrepancies in the literature. The self‐consistent analysis indicates that the SEE measurements of the solar spectral irradiance below ∼45 nm need to be scaled down by ∼25%, whereas the SEE measurements of the solar 121.6 and 130.4 nm fluxes are highly accurate, with errors less than ∼3%. Our results achieve unprecedented agreement (better than ∼5%) between models and observations and provide a novel method for data examination and improvement in FUV remote sensing.
A Three‐Field Formulation for Two‐Phase Flow in Geodynamic Modeling: Toward the Zero‐Porosity Limit
Authors: Lu Gang , May Dave A. , Huismans Ritske S. 
Published: December 2023

AbstractTwo‐phase flow, a system where Stokes flow and Darcy flow are coupled, is of great importance in the Earth's interior, such as in subduction zones, mid‐ocean ridges, and hotspots. However, it remains challenging to solve the two‐phase equations accurately in the zero‐porosity limit, for example, when melt is fully frozen below solidus temperature. Here we propose a new three‐field formulation of the two‐phase system, with solid velocity (vs), total pressure (Pt), and fluid pressure (Pf) as unknowns, and present a robust finite‐element implementation, which can be used to solve problems in which domains of both zero porosity and non‐zero porosity are present. The reformulated equations include regularization to avoid singularities and exactly recover to the standard single‐phase incompressible Stokes problem at zero porosity. We verify the correctness of our implementation using the method of manufactured solutions and analytic solutions and demonstrate that we can obtain the expected convergence rates in both space and time. Example experiments, such as self‐compaction, falling block, and mid‐ocean ridge spreading show that this formulation can robustly resolve zero‐ and non‐zero‐porosity domains simultaneously, and can be used for a large range of applications in various geodynamic settings.
Recent progress in thermoelectric layered cobalt oxide thin films
Authors: Zhang Yuqiao , Ohta Hiromichi 
Published: December 2023

AbstractOxide-based thermoelectric materials that show a high figure of merit are promising because of their good chemical and thermal stabilities and their relative harmlessness compared with chalcogenide-based state-of-the-art thermoelectric materials. Although several high-ZT thermoelectric oxides (ZT > 1) have been reported thus far, their reliability levels are low due to the lack of careful observations of their stabilities at elevated temperatures. Herein, we review the epitaxial film growth and thermoelectric properties of representative p-type layered cobalt oxides: Na3/4CoO2, Ca1/3CoO2, Sr1/3CoO2, Ba1/3CoO2, and Ca3Co4O9. Among these specimens, Ba1/3CoO2 and Ca3Co4O9 are stable in air at elevated temperatures (~600 °C). The ZT of Ba1/3CoO2 reaches ~ 0.55 at 600 °C in air, which is reliable and the highest among thermoelectric oxides. Moreover, this value is comparable to those of p-type PbTe and p-type SiGe.
The influence of anisotropy on the clinical target volume of brain tumor patients
Authors: Buti Gregory , Ajdari Ali , Hochreuter Kim , Shih Helen , Bridge Christopher P , Sharp Gregory C , Bortfeld Thomas 
Published: December 2023

Abstract

Objective. Current radiotherapy guidelines for glioma target volume definition recommend a uniform margin expansion from the gross tumor volume (GTV) to the clinical target volume (CTV), assuming uniform infiltration in the invaded brain tissue. However, glioma cells migrate preferentially along white matter tracts, suggesting that white matter directionality should be considered in an anisotropic CTV expansion. We investigate two models of anisotropic CTV expansion and evaluate their clinical feasibility. Approach. To incorporate white matter directionality into the CTV, a diffusion tensor imaging (DTI) atlas is used. The DTI atlas consists of water diffusion tensors that are first spatially transformed into local tumor resistance tensors, also known as metric tensors, and secondly fed to a CTV expansion algorithm to generate anisotropic CTVs. Two models of spatial transformation are considered in the first step. The first model assumes that tumor cells experience reduced resistance parallel to the white matter fibers. The second model assumes that the anisotropy of tumor cell resistance is proportional to the anisotropy observed in DTI, with an ‘anisotropy weighting parameter’ controlling the proportionality. The models are evaluated in a cohort of ten brain tumor patients. Main results. To evaluate the sensitivity of the model, a library of model-generated CTVs was computed by varying the resistance and anisotropy parameters. Our results indicate that the resistance coefficient had the most significant effect on the global shape of the CTV expansion by redistributing the target volume from potentially less involved gray matter to white matter tissue. In addition, the anisotropy weighting parameter proved useful in locally increasing CTV expansion in regions characterized by strong tissue directionality, such as near the corpus callosum. Significance. By incorporating anisotropy into the CTV expansion, this study is a step toward an interactive CTV definition that can assist physicians in incorporating neuroanatomy into a clinically optimized CTV.
The use of microsatellite markers to analyze genetic diversity of ornamental chili peppers (Capsicum spp.) and their transferability to cross amplification
Authors: Nugroho K , Wartono  , Fatimah  , Mastur  , Lestari P 
Published: December 2023

Abstract
Ornamental chili peppers, as one of high economic value horticultural crops, present a high diversity which needs to be assessed. The aim of this study was to analyze the genetic diversity of ornamental chili pepper genotypes using microsatellite markers and to analyze the transferability of these markers to cross-amplification to ornamental chili pepper species other than Capsicum annuum L. Two generated main clusters revealed in this study, that the first cluster consisted entirely of genotypes from C. annuum species while the second cluster consisted of a mixture from C. annuum, C. chinense, and C. baccatum species. The highest genetic similarity was identified between Nazla IPB and Violeta IPB, and Viola IPB with Triwarsana IPB, with a similarity of 96% for both. Polymorphism analysis showed that all of the microsatellite markers used were classified as highly informative (PIC >0.5). Total markers were able to cross-species amplify all of the ornamental chili pepper genotypes, with an overall average amplification percentage of 96.25%, with most of them showing 100% cross-amplification. Selected microsatellite markers from this study could be used in species differentiation, molecular identification of interspecific hybrids, and assessing the genetic resource on broad genotypes of ornamental chili peppers.