bluuebunny/crossref_metadata_2025_split huggingface dataset:
Stable sol–gel hydroxyapatite coating on zirconia dental implant for improved osseointegration
Authors: Kim Jinyoung , Kang In-Gu , Cheon Kwang-Hee , Lee Sungmi , Park Suhyung , Kim Hyoun-Ee , Han Cheol-Min 
Published: June 2021

AbstractAside from being known for its excellent mechanical properties and aesthetic effect, zirconia has recently attracted attention as a new dental implant material. Many studies have focused on hydroxyapatite (HA) coating for obtaining improved biocompatibility, however the coating stability was reduced by a byproduct produced during the high-temperature sintering process. In this study, to overcome this problem, we simply coated the zirconia surface with a sol–gel-derived hydroxyapatite (HA) layer and then sintered it at a varied temperature (<1000 °C). The surface showed a nanoporous structure, and there was no crystalline phase other than HA and zirconia when the sintering temperature was 800 °C. The adhesion strength of the HA layer (>40 MPa) was also appropriate as a dental implant application. In addition, in vitro cell experiments using a preosteoblast cell line revealed that the HA-coated zirconia surface acts as a preferable surface for cell attachment and proliferation than bare zirconia surface. In vivo animal experiments also demonstrated that the osteoconductivity of zirconia were dramatically enhanced by HA coating, which was comparable to that of Ti implant. These results suggest that the sol–gel-based HA-coated zirconia has a great potential for use as a dental implant material.
Effect of Energy Degeneracy on the Transition Time for a Series of Metastable States
Authors: Bet Gianmarco , Jacquier Vanessa , Nardi Francesca R. 
Published: June 2021

AbstractWe consider the problem of metastability for stochastic dynamics with exponentially small transition probabilities in the low temperature limit. We generalize previous model-independent results in several directions. First, we give an estimate of the mixing time of the dynamics in terms of the maximal stability level. Second, assuming the dynamics is reversible, we give an estimate of the associated spectral gap. Third, we give precise asymptotics for the expected transition time from any metastable state to the stable state using potential-theoretic techniques. We do this in a general reversible setting where two or more metastable states are allowed and some of them may even be degenerate. This generalizes previous results that hold for a series of only two metastable states. We then focus on a specific Probabilistic Cellular Automata (PCA) with configuration space$${\mathcal {X}}=\{-1,+1\}^\varLambda $$X={-1,+1}Λwhere$$\varLambda \subset {\mathbb {Z}}^2$$Λ⊂Z2is a finite box with periodic boundary conditions. We apply our model-independent results to find sharp estimates for the expected transition time from any metastable state in$$\{\underline{-1}, {\underline{c}}^o,{\underline{c}}^e\}$${-1̲,c̲o,c̲e}to the stable state$$\underline{+1}$$+1̲. Here$${\underline{c}}^o,{\underline{c}}^e$$c̲o,c̲edenote the odd and the even chessboard respectively. To do this, we identify rigorously the metastable states by giving explicit upper bounds on the stability level of every other configuration. We rely on these estimates to prove a recurrence property of the dynamics, which is a cornerstone of the pathwise approach to metastability.
The role of rebound spikes in the maintenance of self-sustained neural spiking activity
Authors: Santos Bruno Andre , Gomes Rogerio Martins , Husbands Phil 
Published: June 2021

AbstractIn general, the mechanisms that maintain the activity of neural systems after a triggering stimulus has been removed are not well understood. Different mechanisms involving at the cellular and network levels have been proposed. In this work, based on analysis of a computational model of a spiking neural network, it is proposed that the spike that occurs after a neuron is inhibited (the rebound spike) can be used to sustain the activity in a recurrent inhibitory neural circuit after the stimulation has been removed. It is shown that, in order to sustain the activity, the neurons participating in the recurrent circuit should fire at low frequencies. It is also shown that the occurrence of a rebound spike depends on a combination of factors including synaptic weights, synaptic conductances and the neuron state. We point out that the model developed here is minimalist and does not aim at empirical accuracy. Its purpose is to raise and discuss theoretical issues that could contribute to the understanding of neural mechanisms underlying self-sustained neural activity.
Reformulation of knowledge: epistemological reading of Soviet Marxism in the post-Soviet times
Authors: Chehonadskih Maria 
Published: June 2021

AbstractThe paper questions an official narrative of Soviet Marxism that had been formulated both by the Bolshevik leaders and the Western European Marxists. It proposes to shift the discussion from a historically constituted understanding of Soviet Marxism as a partisanship of theory to the epistemic conditions of Marxism after the October Revolution. The paper argues that a post-revolutionary Soviet logic assumes that theory should start where Marx ended and that it should act in a Marxist fashion across all conceptual and practical realms. Instead of asking ‘how’, the Soviet thought returns to the old pre-critical question of ‘what is’, and reformulates this ‘what is’ in the Marxist post-critical terms. Constructing a new critical concept of Soviet Marxism, the paper proceeds with the analysis of the post-critical status of knowledge after the revolution and recovers forgotten and repressed epistemological alternatives to orthodox Bolshevism.
Neither mindful nor mindless, but minded: habits, ecological psychology, and skilled performance
Authors: Segundo-Ortin Miguel , Heras-Escribano Manuel 
Published: June 2021

AbstractA widely shared assumption in the literature about skilled motor behavior is that any action that is not blindly automatic and mechanical must be the product of computational processes upon mental representations. To counter this assumption, in this paper we offer a radical embodied (non-representational) account of skilled action that combines ecological psychology and the Deweyan theory of habits. According to our proposal, skilful performance can be understood as composed of sequences of mutually coherent, task-specific perceptual-motor habits. Such habits play a crucial role in simplifying both our exploration of the perceptual environment and our decision-making. However, we argue that what keeps habits situated, precluding them from becoming rote and automatic, are not mental representations but the agent's conscious attention to the affordances of the environment. It is because the agent is not acting on autopilot but constantly searching for new information for affordances that she can control her behavior, adapting previously learned habits to the current circumstances. We defend that our account provides the resources needed to understand how skilled action can be intelligent (flexible, adaptive, context-sensitive) without having any representational cognitive processes built into them.
Flower-visiting and pollen-carrying arthropods of Leucojum aestivum L. (Amaryllidaceae) in wild, reintroduced and ex situ populations
Authors: Maggi Livilla Angela , Abeli Thomas , Rossi Graziano , Gobbi Mauro 
Published: June 2021

AbstractLeucojum aestivum L. is a wetland-dependent perennial geophyte occurring in Europe and western Asia. It is self-incompatible, with high level of fruit-set and seed-set. Yet, its pollinators are poorly known. Here, we present the most recent research on potential pollinators of L. aestivum. We collected data on flower-visiting and pollen-carrying arthropods in three populations of the species in the River Po plain (N-Italy), where L. aestivum occurs mainly in forests with Alnus glutinosa and Fraxinus sp. pl. close to rivers. We studied a wild population, a new reintroduced population and an ex situ population located at the Botanical Garden of the University of Pavia. Our study identified 18 arthropod taxa carrying L. aestivum pollen; the soft-winged flower beetle Dasytes plumbeus (Coleoptera: Melyridae) and the sac-spider Clubiona sp. pl. (Araneae: Clubionidae) were the most frequent visitors. Hymenoptera only occasionally visited L. aestivum flowers (e.g. the sweat bee Lasioglossum punctatissimum). D. plumbeus, the long-horned beetle Grammoptera ruficornis (Coleoptera: Cerambycidae), Clubiona sp. pl. and L. punctatissimum resulted in the taxa with the highest average abundance of pollen grains on their body suggesting a potential role in L. aestivum pollination. Differences in flower-visiting and pollen-carrying arthropods were observed between the three populations, with a decreasing taxonomic diversity of visiting species from the wild population to the ex situ population. Our results, based on direct observation in the field, are partially in contrast with a previous study on L. aestivum pollinators that suggested diurnal and nocturnal Lepidoptera and occasionally bees as main pollinators for the species.
Effect of bioactive compounds released from Brassicaceae defatted seed meals on bacterial load in pig manure
Authors: Ugolini Luisa , Scarafile Donatella , Matteo Roberto , Pagnotta Eleonora , Malaguti Lorena , Lazzeri Luca , Modesto Monica , Checcucci Alice , Mattarelli Paola , Braschi Ilaria 
Published: June 2021

AbstractAnimal manure application to soils is considered to be one of the main cause of antibiotic and bacterial pathogen spread in the environment. Pig livestock, which is the source of one of the most used fertilizer for cultivated land, is also a hotspot for antibiotics and antibiotic-resistant bacteria. Besides harsh chemical and physical sanitization treatments for the abatement of antibiotics and bacterial load in livestock waste, more sustainable and environmentally friendly strategies need to be considered. In this context, the use of natural substances which are proved useful for pest and disease control is currently under exploration for their role in the reduction of bacterial pathogen population. Among these, plants and derived products from the Brassicaceae family, characterized by the presence of a defensive glucosinolate-myrosinase enzymatic system, have been successfully exploited for years in agriculture using the so-called biofumigation technique against crop diseases. Although the application of biofumigation to suppress a range of soil borne pests has been well documented, no studies have been examined to reduce bacterial population in animal waste. In the present study, the release and the antibacterial activity of bioactive compounds deriving from different Brassicaceae defatted seed meals against pathogens and bacterial population in pig manure is addressed. Rapistrum rugosum and Brassica nigra defatted seed meals were found to be the most active products against tested pathogens and able to significantly reduce the bacterial load in the manure.
Genome-wide Identification and Abiotic Stress Response Pattern Analysis of NF-Y Gene Family in Peanut (Arachis Hypogaea L.)
Authors: Wan Qian , Luo Lu , Zhang Xiurong , Lv Yuying , Zhu Suqing , Kong Lingrang , Wan Yongshan , Liu Fengzhen , Zhang Kun 
Published: June 2021

AbstractThe nuclear factor Y (NF-Y) transcription factor (TF) family consists of three subfamilies NF-YA, NF-YB and NF-YC. Many studies have proven that NF-Y complex plays multiple essential roles in stress response in Arabidopsis and other plant species. However, little attention has been given to these genes in peanut. In this study, thirty-three AhNF-Y genes were identified in cultivated peanut and they were distributed on 16 chromosomes. A phylogenetic analysis of the NF-Y amino acid sequences indicated that the peanut NF-Y proteins were clustered in pairs at the end of the branches and showed high conservation with previous reported plant NF-Ys. Evolutionary history analysis showed that only segmental duplication contributed to expansion of this gene family. Analysis of the 1500-bp regulatory regions upstream the start codon showed that, except for AhNF-YB6, peanut NF-Ys contained at least one abiotic stress response element in their regulatory region. Expression patterns of peanut NF-Ys in 22 tissues and developmental stages were analyzed. A few NF-Ys showed universal expression patterns, while most NF-Ys showed specific expression patterns. Through RNA-seq and qRT-PCR analyses, expression of six AhNF-Y genes was induced under salt stress in leaves or roots. In addition, AhNF-YA4/8/11, NF-YB4 and NF-YC2/8 also responded to osmotic stress, ABA (abscisic acid) and salicylic acid (SA) treatment.
Urban correction of global DEMs using building density for Nairobi, Kenya
Authors: Olajubu Victor , Trigg Mark A. , Berretta Christian , Sleigh Andrew , Chini Marco , Matgen Patrick , Mojere Stephen , Mulligan Joe 
Published: June 2021

AbstractUrban flood models that use Digital Elevation Models (DEMs) to simulate extent and depth of flood inundation rely on the accuracy of DEMs for predicting flood events. Despite recent advances in developing vegetation corrected DEMs, the effect of building height and density errors in global DEMs in urban areas are still poorly understood, and their correction remains a challenge. In this research we developed a methodology for building error correction that can be applied to any other case study, where building density data and a local reference DEM data are available. This methodology was applied to Nairobi, Kenya using six global DEMs (SRTM, MERIT, ALOS, NASADEM, TanDEM-X 12 m, and TanDEM-X 90 m DEM). Our results show building error at highest building density varying between 1.25 m and 5.07 m for the DEMs used, with the MERIT DEM showing the smallest vertical height error from the reference DEM. The six DEMs were corrected by deriving a linear relationship between building density and DEM error. Our findings show that the removal of building density error resulted in the improvement of the vertical height accuracy of the global DEMs of up to 45% for MERIT and 40% for ALOS. This methodology was also applied to the Central Business District (CBD) area of Nairobi, characterized by taller buildings and high building density. The error parameters in the CBD area resulted to be between 15 to 45% higher than those of the Nairobi city wide area for the six global DEMs, thus providing further insights into the contribution of building heights to errors in global DEMs. Building height data is still unavailable on a global scale and our results show that global DEMs can be usefully corrected for building density errors in urban areas, even where specific building height data are not available.
An Evaluation System for the Conservation of Geomorphological Assets: Landforms in South Korea
Authors: Kang Jihyun , Lee Jaeho 
Published: June 2021

AbstractLandforms are spaces for human life, habitats for animals and plants, and areas that provide various ecological services. However, human development has undermined landform where it should be kept as an important human asset. In South Korea, to reduce this damage, a system was created to evaluate the conservation value of landforms, and either designate them as conservation areas or obtain permission for their development in advance. However, the general public, who demands the development of landforms continuously, have frequently questioned the subjectivity of the evaluation criteria used for the conservation of landforms. National Institute of Ecology (NIE) in South Korea was carried out a project which was to increase the reliability of these criteria by modifying the conservation evaluation system into a quantitative system. This paper aims to introduce the geomorphological survey as a part of the Investigation of National Environment (INE), and an improved evaluation system via the Delphi, the Analytic Hierarchy Process (AHP), on-site verification, etc. As a result of this quantitative evaluation using detailed scoring indicators, specific criteria, and weights for evaluation, there is a low correlation between the indicators, and this confirmed that each indicator was evaluated correctly. In addition, as the quantitative evaluation results and the experts’ opinions generally coincided with the final evaluation grades and values, this indirectly confirmed that the experts who participated in the 4th INE agreed with the evaluation results. This research demonstrates a method that can be used to improve the objective assessment of landforms by experts’ opinion surveys. Future research could use the assessment system developed in this research and apply it to other surveys or countries.
Harmful algal blooms and environmentally friendly control strategies in Japan
Authors: Imai Ichiro , Inaba Nobuharu , Yamamoto Keigo 
Published: June 2021

AbstractThe presence and status of harmful algal blooms (HABs) in Japan are reviewed, revealing a decrease in red tides; however, toxic blooms are found to be increasing in western Japan. Environmentally friendly control strategies against HABs are also compared with integrated agricultural pest management. Very high densities (105–108 CFU/g) of algicidal and growth-inhibiting bacteria were found in biofilm on seagrass and seaweed surfaces and in surrounding coastal seawater. The situation in freshwater ecosystems is similar to coastal seas for toxic cyanobacterium,Microcystis aeruginosa, and aquatic plants. These findings offer new insights into the ecology of influential bacteria and harmful algae, suggesting that protection and restoration of native seagrasses and seaweeds in coastal marine environments should be implemented to suppress HABs. Diatom blooms were successfully induced with bottom sediment perturbation to prevent the occurrence of harmful flagellates such asChattonellaspp. andAlexandrium catenellain the Seto Inland Sea; however, this method requires robust and reproducible verification. “Sato-Umi” is a helpful concept for HAB control in the sea and freshwater ecosystems when adequately managed by people (e.g., appropriate bottom perturbation; protection and restoration of seaweeds, seagrasses, and aquatic plants; application of polycultures of fish, seaweeds, etc.).
Fractured reservoir distribution characterization using folding mechanism analysis and patterns recognition in the Tabnak hydrocarbon reservoir anticline
Authors: Sarkheil Hamid , Hassani Hossein , Alinia Firuz 
Published: June 2021

AbstractNaturally, fractured reservoirs play a considerable part in the study, production, and development of hydrocarbon fields because most hydrocarbon reservoirs in the Zagros Basin are naturally fractured. Production from those reservoirs is usually affected by the presence of a system of connected fractures. In this study, the Tabnak hydrocarbon field on the fold–thrust belt at the Zagros zone in the Persian plate has been analyzed by the facies models, folding mechanism analysis to identify fracture reservoir patterns. The results show a flexural fold with similarity in the folding mechanism and some open fracture potential made by limestone, shale, clay, and anhydrite in the study area's facies models. Consequently, the stress pattern and type of fracture issue on the fold's upper and lower layers will be similar. On the Tabnak anticline reservoir using image processing techniques in MATLAB R2019 software and kriging geostatistical methods, fracture surface patterns as a block model extended to the depth. Using the model results, fractures’ orientation distribution in adjacent wells 11, 14, and 15 is appropriate. The results also have similarities with the facies models, folding mechanism assessment, well test, and mud loss data analysis. These results can affect the development plans’ primary approach by drilling horizontal and sleep wells and hydrocarbon reservoir management strategies.
Porous Carbon Architecture Assembled by Cross-Linked Carbon Leaves with Implanted Atomic Cobalt for High-Performance Li–S Batteries
Authors: Wang Ruirui , Wu Renbing , Ding Chaofan , Chen Ziliang , Xu Hongbin , Liu Yongfeng , Zhang Jichao , Ha Yuan , Fei Ben , Pan Hongge 
Published: June 2021

AbstractThe practical application of lithium–sulfur batteries is severely hampered by the poor conductivity, polysulfide shuttle effect and sluggish reaction kinetics of sulfur cathodes. Herein, a hierarchically porous three-dimension (3D) carbon architecture assembled by cross-linked carbon leaves with implanted atomic Co–N4 has been delicately developed as an advanced sulfur host through a SiO2-mediated zeolitic imidazolate framework-L (ZIF-L) strategy. The unique 3D architectures not only provide a highly conductive network for fast electron transfer and buffer the volume change upon lithiation–delithiation process but also endow rich interface with full exposure of Co–N4 active sites to boost the lithium polysulfides adsorption and conversion. Owing to the accelerated kinetics and suppressed shuttle effect, the as-prepared sulfur cathode exhibits a superior electrochemical performance with a high reversible specific capacity of 695 mAh g−1 at 5 C and a low capacity fading rate of 0.053% per cycle over 500 cycles at 1 C. This work may provide a promising solution for the design of an advanced sulfur-based cathode toward high-performance Li–S batteries.
A Social Enterprise Company in EU Organisational Law?
Authors: LIPTRAP J S 
Published: June 2021

AbstractThis article explores the European Parliament's July 2018 non-legislative resolution proposing to the European Commission a directive for facilitating social enterprise companies’ cross-border activities. The proposal is first situated within the context of the social economy and how the sector has grown in importance to European integration. The proposal and the European Commission's response are then examined. Although the European Commission was not convinced that Member States would be amenable to the proposal, a consensus may already exist that is sufficient to garner their support. Even if this prediction is wrong, however, it is argued that there are reasons to surmise that the proposal will likely be reassessed and ultimately successful at some future point. Finally, the proposal is viewed with a reflexive harmonisation lens. Through the analysis, regulatory issues are identified, and a solution is then suggested.
Genetic diversity and haplotypes of paediatric hydatid cyst isolates and first occurrence of E. canadensis (G6/G7) in paediatric cases in Turkey
Authors: Bakal Unal , Celik Figen , Simsek Sami , Kesik Harun Kaya , Gunyakti Kilinc Seyma 
Published: June 2021

AbstractCystic echinococcosis (CE) is a neglected zoonotic tropical disease caused by Echinococcus granulosus sensu lato. The aim of this study was to investigate the genetic variation of hydatid cyst isolates obtained from surgically confirmed paediatric cases originating from two different regions in eastern Turkey. Seventeen paediatric cases aged between 6 and 16 were operated by open surgery, and the germinal layers of their cysts were obtained for further molecular analyses. After genomic DNA isolation, 875 bp mt-CO1 gene fragments were amplified in all samples by PCR. Then, the unidirectional sequence analyses of the PCR products were carried out. According to the BLAST analyses of 17 sequences, 16 of these sequences were matched with E. granulosus sensu stricto, while one sequence was identified as E. canadensis (G6/G7) for the first time in paediatric cases in Turkey. High haplotype diversity and low nucleotide diversity were observed in the E. granulosus s.s. sequences.