bluuebunny/crossref_metadata_2025_split huggingface dataset:
A dung beetle that path integrates without the use of landmarks
Authors: Dacke Marie , el Jundi Basil , Gagnon Yakir , Yilmaz Ayse , Byrne Marcus , Baird Emily 
Published: September 2020

AbstractUnusual amongst dung beetles, Scarabaeus galenus digs a burrow that it provisions by making repeated trips to a nearby dung pile. Even more remarkable is that these beetles return home moving backwards, with a pellet of dung between their hind legs. Here, we explore the strategy that S. galenus uses to find its way home. We find that, like many other insects, they use path integration to calculate the direction and distance to their home. If they fail to locate their burrow, the beetles initiate a distinct looping search behaviour that starts with a characteristic sharp turn, we have called a ‘turning point’. When homing beetles are passively displaced or transferred to an unfamiliar environment, they initiate a search at a point very close to the location of their fictive burrow—that is, a spot at the same relative distance and direction from the pick-up point as the original burrow. Unlike other insects, S. galenus do not appear to supplement estimates of the burrow location with landmark information. Thus, S. galenus represents a rare case of a consistently backward-homing animal that does not use landmarks to augment its path integration strategy.
A Novel Hybrid Membrane VAD as First Step Toward Hemocompatible Blood Propulsion
Authors: Ferrari Aldo , Giampietro Costanza , Bachmann Björn , Bernardi Laura , Bezuidenhhout Deon , Ermanni Paolo , Hopf Raoul , Kitz Sarah , Kress Gerald , Loosli Christian , Marina Vita , Meboldt Mirko , Pellegrini Giovanni , Poulikakos Dimos , Rebholz Mathias , Schmid Daners Marianne , Schmidt Tanja , Starck Christoph , Stefopoulos Georgios , Sündermann Simon , Thamsen Bente , Zilla Peter , Potapov Evgenij , Falk Volkmar , Mazza Edoardo 
Published: September 2020

AbstractHeart failure is a raising cause of mortality. Heart transplantation and ventricular assist device (VAD) support represent the only available lifelines for end stage disease. In the context of donor organ shortage, the future role of VAD as destination therapy is emerging. Yet, major drawbacks are connected to the long-term implantation of current devices. Poor VAD hemocompatibility exposes the patient to life-threatening events, including haemorrhagic syndromes and thrombosis. Here, we introduce a new concept of artificial support, the Hybrid Membrane VAD, as a first-of-its-kind pump prototype enabling physiological blood propulsion through the cyclic actuation of a hyperelastic membrane, enabling the protection from the thrombogenic interaction between blood and the implant materials. The centre of the luminal membrane surface displays a rationally-developed surface topography interfering with flow to support a living endothelium. The precast cell layer survives to a range of dynamically changing pump actuating conditions i.e., actuation frequency from 1 to 4 Hz, stroke volume from 12 to 30 mL, and support duration up to 313 min, which are tested both in vitro and in vivo, ensuring the full retention of tissue integrity and connectivity under challenging conditions. In summary, the presented results constitute a proof of principle for the Hybrid Membrane VAD concept and represent the basis for its future development towards clinical validation.
From “Angels” to “Vice Smugglers”: the Criminalization of Sea Rescue NGOs in Italy
Authors: Cusumano Eugenio , Villa Matteo 
Published: September 2020

AbstractNon-governmental organizations (NGOs) have played a crucial role in conducting Search and Rescue (SAR) operations off the Libyan coast, assisting almost 120,000 migrants between 2014 and 2019. Their activities, however, have been increasingly criticized. The accusation that NGOs facilitate irregular migration has escalated into investigations by Italian and Maltese courts and various policy initiatives restricting non-governmental ships and their access to European ports. Although all NGOs investigated to date have been acquitted, the combination of criminal investigations and policy restrictions that has taken place in Italy since 2017 has severely hindered non-governmental SAR operations. Given the humanitarian repercussions of reducing NGOs’ presence at sea, the merits and shortcomings of the arguments underlying the criminalization of non-governmental maritime rescue warrant in-depth research. To that end, this article fulfils two interrelated tasks. First, it provides a genealogy of the accusation against NGOs and the ensuing combination of legal criminalization, policy restrictions, and social stigmatization in restraining their activities. Second, it uses quantitative data to show that empirically verifiable accusations like the claim that NGOs serve as a pull factor of migration, thereby causing more people to day at sea, are not supported by available evidence. By doing so, our study sheds new light onto the criminalization of humanitarianism and its implications.
A review of municipal solid waste in China: characteristics, compositions, influential factors and treatment technologies
Authors: Zhu Yanli , Zhang Youxian , Luo Dongxia , Chong Zhongyi , Li Erqiang , Kong Xuepeng 
Published: September 2020

Abstract
Municipal solid waste (MSW) severely threatens human health and the ecological environment owing to its toxicity, mutagenic activity and carcinogenicity. The continuous increase in MSW together with stringent regulations makes sanitary disposal imperative. Waste sorting and recycling has been recognized as an efficient and economical treatment strategy. By analysing research data from 31 provinces between 2000 and 2017, the overarching goal of this work was to determine the characterizations and the compositions of MSW in China and then provide advices for sorting, transporting, storing and disposing of MSW. The results showed that the amount of MSW that was generated ranged from 0.08 to 2.34 kg d−1 ca−1 and averaged 0.73 kg d−1 ca−1 in China. The average bulk density, moisture content and the wet basis of the low calorific value of the MSW were 325 kg m−3, 50.3% and 4649 kcal kg−1. The MSW in China could be classified into four main categories, food waste, recycling waste, landfill waste and hazardous substances, and could be further classified into ten sub-categories. Overall, food waste was the most common and could be best managed via compost production. Bulk density was highly positively correlated with the ratio of the dust and bricks in all MSW and highly negatively correlated with the ratio of the food waste, metal, glass, plastic and rubber. The wet basis of the low calorific value was highly positively correlated with the ratio of the plastic and rubber, and the water content was highly positively correlated with the ratio of the food waste. Temporally, most of the components, especially waste paper and plastics, increased, while wood, dust and bricks decreased.

Graphic abstract
Critical joint identification for efficient sequencing
Authors: Sadeghi Tabar Roham , Wärmefjord Kristina , Söderberg Rikard , Lindkvist Lars 
Published: September 2020

AbstractIdentifying the optimal sequence of joining is an exhaustive combinatorial optimization problem. On each assembly, there is a specific number of weld points that determine the geometrical deviation of the assembly after joining. The number and sequence of such weld points play a crucial role both for sequencing and assembly planning. While there are studies on identifying the complete sequence of welding, identifying such joints are not addressed. In this paper, based on the principles of machine intelligence, black-box models of the assembly sequences are built using the support vector machines (SVM). To identify the number of the critical weld points, principle component analysis is performed on a proposed data set, evaluated using the SVM models. The approach has been applied to three assemblies of different sizes, and has successfully identified the corresponding critical weld points. It has been shown that a small fraction of the weld points of the assembly can reduce more than 60% of the variability in the assembly deviation after joining.
The Optimization of Jc, Birr, n value, Wires Diameter, and Research of the Dominant Pinning Mechanism for Applications of Undoped MgB2 in Superconducting Multi-section Coils
Authors: Gajda D. , Zaleski A. J. , Morawski A. , Cetner T. , Małecka M. , Rindfleisch M. 
Published: September 2020

AbstractThis article discusses the influence of MgB2 wire diameter on critical parameters, dominant pinning mechanism, and n value. Studies were conducted on multifilament MgB2 wires of the 0.84 mm and 0.64 mm diameter. The wires were annealed under 1 GPa isostatic pressure, between 650 and 730 °C. Studies show that the best results (Jc, Birr, n value, and point pinning mechanism) for a 0.64-mm wire were obtained with annealing temperature of 650 °C. However, the best results for wires with a 0.84-mm diameter were obtained with annealing temperature of 730 °C. This research was conducted for exploring the use of MgB2 wires in multi-section superconducting coils, e.g., main coils generating magnetic fields and compensation coils—increasing the homogeneity of the magnetic field. Our research indicates that the main coil made with larger diameter wires should be heated at higher temperature (730 °C). In contrast, compensating coils with smaller diameter wires should be heated at a lower temperature (650 °C).
Role of starch in the ceramic powder synthesis: a review
Authors: Mastalska-Popławska Joanna , Sikora Marek , Izak Piotr , Góral Zuzanna 
Published: September 2020

AbstractThe main goal of this work was to demonstrate a broad range of starch applications in ceramic powder synthesis, and to point out that starch and its derivatives can successfully replace polyvinyl derivatives commonly used in ceramic formulations, as they are water-soluble saccharides, burn out more easily, reduce the exothermicity of the combustion reaction, and allow to receive fine and uniform ceramic powders. Starch is an eco-friendly and easily transformable natural carbohydrate polymer that is found in a variety of applications in ceramics and materials science. In this paper, we review the influence of starch on the physicochemical properties of the ceramic powders obtained by means of various synthesis methods (sol–gel method, combustion process, combined methods, and hydrothermal synthesis). Starch plays a differentiated role in each of these methods, i.e., it is a polymerizing agent in sol–gel method, a fuel in combustion process, and a substrate for carbon spheres in hydrothermal synthesis.
The existential/uniqueness presupposition of wh-complements projects from the answers
Authors: Uegaki Wataru 
Published: September 2020

AbstractThe projection pattern of the existential/uniqueness presupposition of awh-complement varies depending on the predicate that embeds it. This variation poses problems for existing accounts that treat the presupposition as a semantic contribution of an operator merging with thewh-complement (Dayal in Locality in Wh-quantification: questions and relative clauses in Hindi. Kluwer Academic Publishers, Dordrecht, 1996) or of the embedding predicate (Uegaki in Interpreting questions under attitudes. Massachusetts Institute of Technology PhD dissertation, Cambridge, 2015). I propose that the problems can be solved if the existential/uniqueness presupposition is contributed by the propositions corresponding to the answers of the embedded question, under the Hamblin/Karttunen semantics for questions.
Bibliometrics in Academic Recruitment: A Screening Tool Rather than a Game Changer
Authors: Reymert Ingvild 
Published: September 2020

AbstractThis paper investigates the use of metrics to recruit professors for academic positions. We analyzed confidential reports with candidate evaluations in economics, sociology, physics, and informatics at the University of Oslo between 2000 and 2017. These unique data enabled us to explore how metrics were applied in these evaluations in relation to other assessment criteria. Despite being important evaluation criteria, metrics were seldom the most salient criteria in candidate evaluations. Moreover, metrics were applied chiefly as a screening tool to decrease the number of eligible candidates and not as a replacement for peer review. Contrary to the literature suggesting an escalation of metrics, we foremost detected stable assessment practices with only a modestly increased reliance on metrics. In addition, the use of metrics proved strongly dependent on disciplines where the disciplines applied metrics corresponding to their evaluation cultures. These robust evaluation practices provide an empirical example of how core university processes are chiefly characterized by path-dependency mechanisms, and only moderately by isomorphism. Additionally, the disciplinary-dependent spread of metrics offers a theoretical illustration of how travelling standards such as metrics are not only diffused but rather translated to fit the local context, resulting in heterogeneity and context-dependent spread.
Cellular retinol binding protein 1 transfection reduces proliferation and AKT-related gene expression in H460 non-small lung cancer cells
Authors: Ferlosio Amedeo , Doldo Elena , Agostinelli Sara , Costanza Gaetana , Centofanti Federica , Sidoni Angelo , Orlandi Augusto 
Published: September 2020

AbstractIn recent years, new treatments with novel action mechanisms have been explored for advanced non-small cell lung cancer (NSCLC). Retinoids promote cancer cell differentiation and death and their trafficking and action is mediated from specific cytoplasmic and nuclear receptors, respectively. The purpose of this study was to investigate the effect of Cellular retinol binding protein-1 (CRBP-1) transfection in H460 human NSCLC cell line, normally not expressing CRBP-1. H460 cells were transfected by using a vector pTargeT Mammalian expression system carrying the whole sequence of CRBP-1 gene. For proliferation and apoptosis studies, cells were treated with different concentrations of all-trans Retinoic Acid (atRA) and retinol. AKT-related gene expression was analyzed by using western blot and Signosis array and results analysed by one-way analysis of variance (ANOVA) or by t-student test. CRBP-1+ showed reduced proliferation and viability in basal condition and after atRA treatment when compared to empty-transfected H460 cells. Reduced proliferation in CRBP-1+ H460 cells associated to the down-regulation of pAKT/pERK/pEGFR-related genes. In particular, gene array documented the down-regulation of AKT and Stat-3-related genes, including M-Tor, Akt1, Akt2, Akt3, Foxo1, p27, Jun. Restoration of CRBP-1 expression in H460 cells reduced proliferation and viability in both basal condition and after atRA treatment, likely by down-regulating AKT-related gene level. Further studies are needed to better clarify how those CRBP-1-related intracellular pathways contribute to counteract NSCLC progression in order to suggest a potential tool to improve efficacy of retinoid anti lung cancer adjuvant therapy.
Perturbation Theory of Transformed Quantum Fields
Authors: Balduf Paul-Hermann 
Published: September 2020

AbstractWe consider a scalar quantum field ϕ with arbitrary polynomial self-interaction in perturbation theory. If the field variable ϕ is repaced by a global diffeomorphism ϕ(x) = ρ(x) + a1ρ2(x) + …, this field ρ obtains infinitely many additional interaction vertices. We propose a systematic way to compute connected amplitudes for theories involving vertices which are able to cancel adjacent edges. Assuming tadpole graphs vanish, we show that the S-matrix of ρ coincides with the one of ϕ without using path-integral arguments. This result holds even if the underlying field has a propagator of higher than quadratic order in the momentum. The diffeomorphism can be tuned to cancel all contributions of an underlying ϕt-type self interaction at one fixed external offshell momentum, rendering ρ a free theory at this momentum. Finally, we mention one way to extend the diffeomorphism to a non-diffeomorphism transformation involving derivatives without spoiling the combinatoric structure of the global diffeomorphism.
Reduplication and the structure of nouns in Xining Chinese
Authors: Wang Qi , Holmberg Anders 
Published: September 2020

AbstractIn Xining Chinese, especially as used by older people, free nouns are always reduplicated, as a purely formal condition without any semantic effects. We argue that the reduplication takes place when an acategorial root is merged with a null nominal categorizer which copies the phonological matrix of the root, as an effect of a condition ruling out free monosyllabic nouns. When the condition is not independently satisfied, as in a compound or derived noun, reduplication is how the condition is met. Reduplication also occurs optionally in compounds or derived nouns. In conjunction with a minimalist theory of word formation, this will be shown to predict the distribution of reduplication in various contexts. For instance, the head of a compound can be reduplicated, but not the modifier, some affixes but not others permit reduplication of the base, non-compositional compounds do not allow reduplication, and so-called ‘bound roots’ (really, bound words) are not reduplicated. The phenomenon provides very strong evidence that simple content words are made up of an acategorial root and a categorizer which is often null, but can be overt in some languages, including Xining Chinese, where it is overt in nouns by virtue of reduplication.
Hayabusa2’s Superior Solar Conjunction Phase
Authors: Soldini Stefania , Yamaguchi Tomohiro , Tsuda Yuichi , Takanao Saiki , Nakazawa Satoru 
Published: September 2020

AbstractHayabusa2 is the ongoing JAXA’s sample and return mission to the asteroid Ryugu. In late 2018, Ryugu was in superior solar conjunction with the Earth. It is the first time that a spacecraft experiences the blackouts in the communication link with the Earth while hovering around a small celestial body. In this article, the design of the nominal conjunction trajectory flown by the Hayabusa2’s spacecraft is presented. The requirements for the conjunction trajectory were (1) to guarantee a low fuel consumption, (2) to ensure the visibility of the asteroid by the spacecraft’s wide angle camera ($60^{\circ }$

60
∘

FoV), and (3) to increase the spacecraft altitude to a safety location ($\sim109~\mbox{km}$
∼
109

km
) from the nominal BOX-A operation of 20 km (Home Position - HP). Finally, (4) to return at BOX-A after the conjunction phase. Given the mission constraints, the designed conjunction trajectory appears to have a fish-shape in the Hill coordinates therefore we renamed it as “ayu” (sweetfish in Japanese) trajectory. The optNEAR tool was developed for the guidance ($\Delta V\mbox{s}$
Δ
V
s
planning) and navigation design of the Hayabusa2’s conjunction mission phase. A preliminary sensitivity analysis in the Hill reference frame proved that the ayu trajectory is a good candidate for the conjunction operation of hovering satellite. The solution in the Hill coordinates is refined in the full-body planetary dynamics (optNEAR Tool) before flight. The ayu conjunction trajectory requires (a) two deterministic $\Delta V\mbox{s}$
Δ
V
s
at the Conjunction Orbit Insertion (COI) point and at the Home-position Recovery Maneuver (HRM) point respectively. (b) Two stochastic $\Delta V\mbox{s}$
Δ
V
s
, known as Trajectory Correction Manoeuvres (TCMs), before and after the deep conjunction phase are also required. The constraint linear covariance analysis in the full-body dynamics is here derived and used for the preliminary guidance and navigation planning. The results of the covariance analysis were validated in a nonlinear sense with a Monte Carlo approach which proved the validity of the semi-analytic method for the stochastic $\Delta V\mbox{s}$
Δ
V
s
planning derived in this paper.
Abscisic acid in preservation of Taraxacum pieninicum in the form of synthetic seeds in slow growth conditions
Authors: Kamińska Monika , Kęsy Jacek , Trejgell Alina 
Published: September 2020

AbstractTaraxacum pieninicum Pawł. is listed as critically endangered species, for which currently applied protection methods are insufficient. The aim of this study was to investigate the possibility of T. pieninicum storage in the form of synthetic seeds under slow-growth conditions in combination with ABA treatment, as one of the ex situ protection methods of this species. The obtained results indicated that darkness was much more favorable condition for synseed storage and did not generate additional stress during cold exposure in contrast to the light conditions. The preculture of shoot tips on the medium supplemented with ABA led to a decrease in the shoots proliferation rate and inhibition of their growth. ABA clearly inhibited growth of the encapsulated shoot tips also during cold storage. Biochemical parameters showed that ABA effectively reduced the negative effect of the cold stress, what was found on the basis of analyzes of H2O2 and TBARS levels in the stored material. Moreover, synseeds stored under light conditions and treated with ABA exhibited decreased level of endogenous jasmonic acid what indicated interaction between those two phytohormones at a low temperature. The study also demonstrated that in vitro culture, cold storage and ABA treatment had no effect on the flowering process of this species after acclimatization to ex vitro conditions.
Housing Stability and Hepatitis C Infection for Young Adults Who Inject Drugs: Examining the Relationship of Consistent and Intermittent Housing Status on HCV Infection Risk
Authors: Morris Meghan D. , Yen Irene H. , Shiboski Steve , Evans Jennifer L. , Page Kimberly 
Published: September 2020

AbstractHousing status affects drug using behaviors, but less is known about the relationship between housing patterns and hepatitis C virus (HCV) infection. HCV-negative young people who inject drugs (PWID) were enrolled into a prospective cohort (2003–2019) with quarterly study visits. We used Cox regression to estimate the independent association of recent housing status (housed vs. unhoused, housing stability, and housing trajectory) on HCV incidence. Among 712 participants, 245 incident HCV infections occurred over 963.8 person-years (py) (cumulative incidence 24.4/100 py). An inverse relationship between time housed and HCV incidence was observed (always unhoused 45.0/100 py, 95% confidence interval (CI) 37.1, 54.5; variably housed 18.0/100 py, 95% CI 15.0, 21.3; and always housed 7.0/100 py, 95% CI 3.0, 17.3). In Cox regression models controlling for confounders, those unhoused versus housed at baseline had a 1.9-fold increased infection risk (95% CI 1.4, 2.6). Those always unhoused versus always housed had a 1.5 times greater risk of HCV (95% CI 1.0, 2.3), and those spending a portion of time in stable housing a lower risk (adjusted relative hazard 0.05, 95% CI 0.3, 0.9) with a similar trend for those being housed for less time. Young adult PWID experiencing both recent and chronic states of being unhoused are at elevated risk for HCV infection. Importantly for this group of PWID, our findings indicate that some frequency of residential housing significantly reduces HCV infection risk.