bluuebunny/crossref_metadata_2025_split huggingface dataset:
Pregnancy-associated aortopathy and sudden postpartum death
Authors: Byard Roger W 
Published: April 2023

AbstractA 39-year-old woman who had undergone an uncomplicated elective cesarean section for a low-lying placenta collapsed and died the following day. At autopsy, there was dissection of an aneurysmally-dilated thoracic aorta with 400 mls of fluid and clotted blood in the pericardial sac. There were no features of Marfan syndrome or other connective tissue disorders. Histology revealed thinning of the aortic wall with fragmentation of elastic fibers and no inflammation. Vessels elsewhere were normal. This case demonstrates a rare complication of pregnancy that may not present until after delivery with unexpected collapse and sudden death. Predisposing factors include an increased cardiac output, reduction in systemic vascular resistance, an increase in left ventricular muscle mass, and alterations in serum progesterone and estrogen levels which may cause structural changes to the aortic wall. The possibility of syndromic and familial connective tissue disorders should also be considered.
Numerical solution of a new mathematical model for intravenous drug administration
Authors: Alijani Zahra , Shiri Babak , Perfilieva Irina , Baleanu Dumitru 
Published: April 2023

AbstractWe develop and analyze a new mathematical model for intravenous drug administration and the associated diffusion process. We use interval analysis to obtain a system of weakly singular Volterra integral equations over ordinary functions. We then use the operational method based on Chebyshev polynomials for obtaining an approximate solution of the numerical form. We show that for a certain class of fuzzy number valued functions, their generalized Hukuhara derivatives can be reduced to the derivatives of ordinary real-valued functions. By using our approach, we are able to estimate numerical solutions very accurately.
Explaining skills of prospective teachers – Findings from a simulation study
Authors: Findeisen Stefanie , Seifried Juergen 
Published: April 2023

AbstractProviding instructional explanations is a central skill of teachers. Using interactive simulations, we examined the explaining skills of 48 prospective teachers attending a teacher education program for accounting in vocational schools in Germany. We used a performance-based assessment that relies on explanatory quality as an indicator of teacher candidates’ explaining skills. Video analysis was used to assess the quality of prepared and impromptu explanations in respect of different quality aspects. We found that the prepared explanations of prospective teachers were of high quality in terms of student–teacher interaction and language. With respect to the quality of content (e.g., accuracy, multiple approaches to explaining) and representation (e.g., visualization, examples), prospective teachers performed significantly worse. The quality of teacher candidates’ improvised explanations was significantly lower. This was especially true for the quality of representations, the process structure, and the interaction between student and teacher. For four of the five quality criteria examined, no correlation could be found between the quality of prepared and improvised explanations. For the language criterion, however, there was a correlation between the two types of explaining situations. Implications on how to support teacher candidates in developing explaining skills during teacher education are discussed.
Prediction of the debulking effect of rotational atherectomy using optical frequency domain imaging: a prospective study
Authors: Hamana Tomoyo , Kawamori Hiroyuki , Toba Takayoshi , Nishimori Makoto , Tanimura Kosuke , Kakizaki Shunsuke , Nakamura Koichi , Fujimoto Daichi , Sasaki Satoru , Osumi Yuto , Fujii Masayoshi , Iwane Seigo , Yamamoto Tetsuya , Naniwa Shota , Sakamoto Yuki , Fukuishi Yuta , Matsuhama Koshi , Hirata Ken-ichi , Otake Hiromasa 
Published: April 2023

AbstractThis study determined the predictive accuracy of optical frequency domain imaging (OFDI) on debulking effects of rotational atherectomy (RA) and compared the predictive accuracy of OFDI catheter-based with Rota wire-based prediction methods. This prospective, single-center, observational study included 55 consecutive patients who underwent OFDI-guided RA. On pre-RA OFDI images, a circle, identical to the Rota burr was drawn at the center of the OFDI catheter (OFDI catheter-based prediction method) or wire (wire-based prediction method). The area overlapping the vessel wall was defined as the predicted ablation area (P-area). The actual ablated area (A-area) was measured by superimposing the OFDI images before and after RA. The overlapping P-area and A-area were defined as overlapped ablation area (O-area), and the predictive accuracy was evaluated by %Correct area (O-area/P-area) and %Error area (A-area  − O-area/A-area). The median %Correct and %Error areas were 47.8% and 41.6%, respectively. Irrelevant ablation (low %Correct-/high % Error areas) and over ablation (high %Correct-/high % Error areas) were related to deep vessel injury and intimal flap outside the P-area. The predictive accuracy was better in the OFDI catheter-based prediction method than the wire-based prediction method in the cross sections where the OFDI catheter and wire came in contact. However, it was better in the latter than the former where the OFDI catheter and wire were not in contact. OFDI-based simulation of the RA effect is feasible though accuracy may be affected by the OFDI catheter and wire position. OFDI-based simulation of RA effect might reduce peri-procedural complications during RA.
Housing prices in Spain: convergence or decoupling?
Authors: Ghirelli Corinna , Leiva-León Danilo , Urtasun Alberto 
Published: April 2023

AbstractIn this article, we measure changes in the synchronization of housing price cycles across Spanish cities over time. We rely on a regime-switching framework that identifies the housing price cycles of pairs of cities and simultaneously infers the evolving relation between those cycles. These bilateral relationships are then summarized into an aggregate index of city-level housing cycle synchronization. The estimates suggest that Spanish housing prices have followed a convergence pattern that reached a peak in 2009 and decreased slightly afterward. We also identify the cities that have been the main contributors to this convergence process. Moreover, we show that differences in population growth and economic structure are key factors in explaining the evolution of housing price synchronization among Spanish cities.
Automotive safety approach for future eVTOL vehicles
Authors: Laarmann Lukas , Thoma Andreas , Misch Philipp , Röth Thilo , Braun Carsten , Watkins Simon , Fard Mohammad 
Published: April 2023

AbstractThe eVTOL industry is a rapidly growing mass market expected to start in 2024. eVTOL compete, caused by their predicted missions, with ground-based transportation modes, including mainly passenger cars. Therefore, the automotive and classical aircraft design process is reviewed and compared to highlight advantages for eVTOL development. A special focus is on ergonomic comfort and safety. The need for further investigation of eVTOL’s crashworthiness is outlined by, first, specifying the relevance of passive safety via accident statistics and customer perception analysis; second, comparing the current state of regulation and certification; and third, discussing the advantages of integral safety and applying the automotive safety approach for eVTOL development. Integral safety links active and passive safety, while the automotive safety approach means implementing standardized mandatory full-vehicle crash tests for future eVTOL. Subsequently, possible crash impact conditions are analyzed, and three full-vehicle crash load cases are presented.
Can ultimate recoverable resources (URRs) be assessed? Does analyzing declining ore grades help?
Authors: Wellmer Friedrich-W. , Scholz Roland W. , Bastian Dennis 
Published: April 2023

AbstractInspired by a paper by Teseletso and Adachi (Miner Econ 8(10):21, 2021), the hypothesis regarding the declining grade of mined copper ore and its possible use as a guide to the future of ultimate recoverable resources (URRs) is tested. As a time axis, cumulative production is taken. Grades can be either grade of cumulative tonnage or annual production grade. Correlation can be linear (grade and tonnage) or semi-logarithmic (grade linear, tonnage logarithmic). We first show that the assumption that the highest correlation is the best guide to the future may be a fallacy. This is the linear correlation between grades of cumulative tonnage and cumulative tonnages since 1959, i.e., 85% of all copper mined historically with a near-perfect correlation approaching one (R2 = 0.97). This leads to implausibly low results of the URR, clearly demonstrating that this trend must shift in the future. Moreover, Teseletso and Adachi’s (Miner Econ 8(10):21, 2021) approach using a linear or semi-logarithmic correlation between annual grades with cumulative production leads to erroneous results. Here, the later the calculation of the correlation begins, the lower the extrapolated tonnages are at predetermined, postulated ultimate cutoff grades. This contradicts the accepted knowledge that with lower grades, the resource base is broadened—not narrowed. The only reasonable finding results from the correlation between linear grades of cumulative production with logarithmic cumulative production, i.e., the Lasky relationship, indicating a URR of 7.5 GT Cu, of which 6.7 GT remain to be mined, which is equivalent of close to 325 years of present production. The trend towards declining Cu grades with constant real Cu prices shows the potential for creative solutions for other metal as well.
Modified biomass adsorbents for removal of organic pollutants: a review of batch and optimization studies
Authors: Adegoke K. A. , Akinnawo S. O. , Adebusuyi T. A. , Ajala O. A. , Adegoke R. O. , Maxakato N. W. , Bello O. S. 
Published: April 2023

AbstractModification of the adsorbent surfaces has been considered a fascinating strategy that enhances biomass-based adsorption properties for efficient removal of organic pollutants. This is based on the attempt to replace the cost-ineffectiveness of the commercial activated carbon. The present study discusses different modification strategies and a review on modified biomass materials for the sorption of organic contaminants. Unlike previous literatures in the field, wider range of these pollutants are discussed in this study under different categories including pesticides (such as insecticides, herbicides, fungicides), pharmaceutical (e.g. analgesic and antipyretic drugs, antibiotic drugs, non-steroidal anti-inflammatory drugs and antimalaria drugs), and dyes (e.g. azo, xanthene, miscellaneous diagnostic, tri-aryl methane, and phenol-derived polymeric dyes). It was observed that the acid-activated Posidonia oceanica and HNO3-modified rice husk displayed the highest and lowest adsorption capacities of 2681.9 and 0.35 mg/g for removing Rhodamine B dye and methyl parathion pesticide, respectively. The mechanistic aspects of organic pollutants adsorption, their corresponding regeneration studies, and environmental challenges with chemical modifications are also discussed. The use of computational (optimization) models for modified biomass-based adsorbents to remove organic pollutants is devoid in previous reviews but discussed in the present study. To foster more advancement in this field, the concluding part presents various challenges and knowledge gaps for furthering research towards more realistic industrial implementations.
Active tectonics of the Circum-Pannonian region in the light of updated GNSS network data
Authors: Porkoláb Kristóf , Broerse Taco , Kenyeres Ambrus , Békési Eszter , Tóth Sándor , Magyar Bálint , Wesztergom Viktor 
Published: April 2023

AbstractThe Pannonian basin is an extensional back-arc basin that has undergone neotectonic inversion and is currently shortening. The understanding and quantification of present-day deformation processes during this inversion are still incomplete. To this end, we investigate the active deformation of the Circum-Pannonian region via the interpolation of GNSS-derived velocity field and the derivation of the strain rate fields. For the interpolation of the velocity field, we use ordinary kriging, a strochastic interpolation method. Our results show that estimating a strain rate field that is virtually free of short-wavelength noise requires the scaling of the velocity uncertainties, i.e. assuming a minimum standard deviation of 1 mm/yr in our case. The deformation of the Circum-Pannonian region is defined by the 2–3 mm/yr, NNE-directed motion of the Dinarides, and by the 0.5–1.5 mm/yr, WSW to SSW directed motion of the eastern areas (European foreland, East Carpathians, South Carpathians, Transylvanian basin). These opposite-sense motions define a large-scale, on average NE-SW shortening and transpression-type deformation in the Dinarides as well as in the Pannonian basin, while the East and South Carpathians undergo regional N–S extension. Neotectonic structures generally show good agreement with the strain rate field, for example in the Dinarides, Eastern Alps, or in the western Pannonian basin. However, the presence of fault-parallel shortening or biaxial shortening along sinistral neotectonic structures in the central and eastern Pannonian basin show some discrepancy between current geodetic and observed neotectonic deformation. The vertical velocity field shows dominantly 100 and 1000 km wavelength signals, the former is probably related to the response of the Pannonian lithosphere-asthenosphere system to neotectonic basin inversion, while latter can possibly be explained by far-field subsidence patterns induced by the mantle response to melting of the Fennoscandian ice sheet during the current interglacial period.
A Lightweight Neural Network for Loop Closure Detection in Indoor Visual SLAM
Authors: Zhou Deyang , Luo Yazhe , Zhang Qinhan , Xu Ying , Chen Diansheng , Zhang Xiaochuan 
Published: April 2023

AbstractLoop closure detection (LCD) plays an important role in visual simultaneous location and mapping (SLAM), as it can effectively reduce the cumulative errors of the SLAM system after a long period of movement. Convolutional neural networks (CNNs) have a significant advantage in image similarity comparison, and researchers have achieved good results by incorporating CNNs into LCD. The LCD based on CNN is more robust than traditional methods. As the deep neural network frameworks from AlexNet and VGG to ResNet have become smaller while maintaining good accuracy, indoor LCD does not need robots to finish a large number of complex processing operations. To reduce the complexity of deep neural networks, this paper presents a new lightweight neural network based on MobileNet V2. We propose a strategy to use Efficient Channel Attention (ECA) to insert into Compressed MobileNet V2 (ECMobileNet) for reducing operands while maintaining precision. A corresponding loop detection method is designed based on the average distribution of ECMobileNet feature vectors combined with Euclidean distance matching. We used TUM datasets to evaluate the results, and the experimental results show that this method outperforms the state-of-the-art methods. Although the model was trained only on the indoorCVPR dataset, it also demonstrated superior performance on the TUM datasets. In particular, the proposed approach is more lightweight and highly efficient than the current existing neural network approaches. Finally, we used TUM datasets to test LCD based on ECMobileNet in PTAM, and the experimental results show that this lightweight neural network is feasible.
Prediction of Glioma Grade by Tumor Heterogeneity Radiomic Analysis Based on Multiparametric MRI
Authors: Deng Shuangge , Zhu Yongqian 
Published: April 2023

AbstractPredicting glioma grade plays a pivotal role in treatment and prognosis. However, several current methods for grading depend on the characteristics of the whole tumor. Predicting grade by analyzing tumor subregions has not been thoroughly investigated, which aims to improve the prediction performance. To predict glioma grade via analysis of tumor heterogeneity with features extracted from tumor subregions, it is mainly divided into four magnetic resonance imaging (MRI) sequences, including T2-weighted (T2), fluid-attenuated inversion recovery (FLAIR), pre-gadolinium T1-weighted (T1), and post-gadolinium T1-weighted methods. This study included the data of 97 patients with glioblastomas and 42 patients with low-grade gliomas before surgery. Three subregions, including enhanced tumor (ET), non-enhanced tumor, and peritumoral edema, were obtained based on segmentation labels generated by the GLISTRBoost algorithm. One hundred radiomic features were extracted from each subregion. Feature selection was performed using the cross-validated recursive feature elimination with a support vector machine (SVM) algorithm. SVM classifiers with grid search were established to predict glioma grade based on unparametric and multiparametric MRI. The area under the receiver operating characteristic curve (AUC) was used to evaluate the performance of the classifiers, and the performance of the subregions was compared with the results of the whole tumor. In uniparametric analysis, the features from the ET subregion yielded a higher AUC value of 0.8697, 0.8474, and 0.8474 than those of the whole tumor of FLAIR, T1, and T2. In multiparametric analysis, the ET subregion achieved the best performance (AUC = 0.8755), which was higher than the uniparametric results. Radiomic features from the tumor subregion can potentially be used as clinical markers to improve the predictive accuracy of glioma grades.
Global collaborations in antimicrobial stewardship: All hands on deck
Authors: Ashiru-Oredope Diane , Langford Bradley J. , Bonaconsa Candice , Nampoothiri Vrinda , Charani Esmita , Goff Debra A. 
Published: April 2023

Abstract
Tackling antimicrobial resistance (AMR) through antimicrobial stewardship (AMS) interventions is a key objective within the World Health Organization (WHO)’s Global Action on AMR. We outline the reasons why global collaborations for AMS are needed. We provide examples of global collaborations, and we offer considerations when starting on a global health journey focused on AMS.
Africa's Lame Ducks: Second-Term Presidents and the Rule of Law
Authors: Carbone Giovanni , Cassani Andrea 
Published: April 2023

AbstractThe vast majority of sub-Saharan countries have adopted constitutional clauses establishing that elected presidents cannot serve more than two mandates. While an extensive literature has examined why African leaders comply with or else try to manipulate term limits, the policy implications of the latter remain unexplored. Existing studies of other world regions suggest that setting a maximum number of terms presidents can serve tends to make them ‘lame ducks’ during their final mandate. We reconsider this argument, and posit and demonstrate empirically that constitutional limits can actually induce positive effects on second-term presidents' actions compared to their first terms. More specifically, the absence of electoral pressures, the concern for their post-presidential future and legacy-building motivations may lead to improvements in the rule of law, especially regarding the functioning of the judiciary. This article represents the first empirical investigation of the performance of Africa's second-term lame-duck presidents.
International alliance structure and effectiveness: evidence from law firms
Authors: Salvoldi Rany , Brock David M. 
Published: April 2023

Abstract
International alliances are important strategic vehicles to build geographic scope and enter foreign markets, especially for firms lacking the resources or facing limitations to direct foreign expansion. Addressing recent calls to study alliance structure, we investigate the design parameters of nonequity international alliances and their performance implications. Building on the resource-based view of the firm, we theorize the effect of three key structural dimensions – formalization, interface, and specialization – on firm effectiveness. Our empirical work focusses on the legal service industry where international interfirm alliances are common, and resources like expert workers and knowledge are essential. We study 121 French, German, Italian, and Spanish law firms; and our data include the structural features of the alliances to which they belong, as well as various measures of firm effectiveness. Our analyses via structural equation modelling point toward the importance of informality and strong interface for effectiveness in these contexts. This study contributes to a finer understanding of international alliances by directly addressing the structural variation among nonequity international alliances, and analyzes their implications for firms. We thus respond to calls to investigate structural dimensions of alliances, operationalizing relevant dimensions of alliance organizational structure. Second, we add to understanding of the performance effects of international alliances, showing the benefits of individual structural parameters for firm effectiveness. Finally, we extend research on the use of international alliances as a strategic vehicle to enter foreign markets, capturing essential aspects of the internal arrangements of these interorganizational collaborative relationships, and thus adding to understanding of this strategic entry mode.
WALLABY pre-pilot survey: Radio continuum properties of the Eridanus supergroup
Authors: Grundy J. A. , Wong O. I. , Lee-Waddell K. , Seymour N. , For B.-Q. , Murugeshan C. , Koribalski B. S. , Madrid J. P. , Rhee J. , Westmeier T. 
Published: April 2023

AbstractWe present the highest resolution and sensitivity$\sim$$1.4\,$GHz continuum observations of the Eridanus supergroup obtained as a part of the Widefield Australian Square Kilometer Array Pathfinder (ASKAP)L-band Legacy All-sky Blind surveY (WALLABY) pre-pilot observations using the ASKAP. We detect 9461 sources at 1.37 GHz down to a flux density limit of$\sim$$0.1$mJy at$6.1''\times 7.9''$resolution with a median root mean square of 0.05 mJy beam$^{-1}$. We find that the flux scale is accurate to within 5 % (compared to NVSS at 1.4 GHz). We then determine the global properties of eight Eridanus supergroup members, which are detected in both radio continuum and neutral hydrogen (HI) emission, and find that the radio-derived star formation rates (SFRs) agree well with previous literature. Using our global and resolved radio continuum properties of the nearby Eridanus galaxies, we measure and extend the infrared-radio correlation (IRRC) to lower stellar masses and inferred SFRs than before. We find the resolved IRRC to be useful for: (1) discriminating between active galactic nuclei and star-forming galaxies; (2) identifying background radio sources; and (3) tracing the effects of group environment pre-processing in NGC 1385. We find evidence for tidal interactions and ram-pressure stripping in the HI, resolved spectral index and IRRC morphologies of NGC 1385. There appears to be a spatial coincidence (in projection) of double-lobed radio jets with the central HI hole of NGC 1367. The destruction of polycyclic aromatic hydrocarbons by merger-induced shocks may be driving the observedWISE W3deficit observed in NGC 1359. Our results suggest that resolved radio continuum and IRRC studies are excellent tracers of the physical processes that drive galaxy evolution and will be possible on larger sample of sources with upcoming ASKAP radio continuum surveys.