bluuebunny/crossref_metadata_2025_split huggingface dataset:
An efficient CBIR system based on color histogram, edge, and texture features
Authors: Sundara Vadivel P. , Yuvaraj D. , Navaneetha Krishnan S. , Mathusudhanan S.R. 
Published: October 2018

SummaryContent‐based image retrieval (CBIR) has been popular in recent times due to the necessity of storing large database of images in information processing and biomedical applications. However, the accurate retrieval of images and retrieval time are the two major challenges in CBIR systems. Most of the existing works focus on searching the whole database; hence, the retrieval process becomes a time consuming process. This paper proposes an efficient CBIR system, which retrieves images accurately with reasonable retrieval time using the combination of color histogram, edge, and texture features. Initially, the searching is done based on the color similarity and texture using modified Color Difference Histogram (CDH). Then, an edge orientation technique is applied only on the identified images to create a combined feature space. This process greatly reduces the time required for retrieval process due to the absence of fusion process which is quite normal in CBIR systems. Simulations are conducted on the standard databases to show the superior performance of the proposed CBIR system in terms of retrieval time and accuracy.
Isolation of Adipose Tissue–Derived Stem Cells: Enzymatic Digestion in Combination with Mechanical Distortion to Increase Adipose Tissue–Derived Stem Cell Yield from Human Aspirated Fat
Authors: Alstrup Toke , Eijken Marco , Bohn Anja Bille , Møller Bjarne , Damsgaard Tine Engberg 
Published: October 2018

AbstractMesenchymal stem cells (MSCs) are of great interest due to their properties of immune modulation, tissue regeneration, and multipotent differentiation. Future developments of clinical applications, however, require a higher yield of MSCs, lower number of passages of cells in culture, and shorter time from harvest to use. Optimization and standardization of techniques for mesenchymal adipose tissue–derived stem cell isolation offers solutions to current bottlenecks as a larger amount of MSCs can be isolated. These improvements result in shorter expansion time, fewer passages, less donor material needed, and higher MSC yield. This paper describes an MSC isolation method combining enzymatic digestion with mechanic disruption. This protocol is a standardized and easy‐to‐implement method for reaching significantly higher MSC yields compared to conventional enzymatic isolation protocols. Based on the results presented, we hypothesize that the combined enzymatic and mechanical method increases the surface area of the adipose tissue, facilitating digestion by enzymes. This approach reduces the amount of adipose tissue and in vitro expansion time needed to reach sufficient amounts of MSCs for clinical purposes. Importantly, the method does not require increased amounts of collagenase, nor does it impair the viability or differentiability of the MSCs. Using this protocol increases MSC yield by a factor of three. As a consequence, these results indicate that the physiological concentration of MSCs in adipose tissue is higher than previously assumed. © 2018 by John Wiley & Sons, Inc.
Optimizing Grain Selection Design in the Single‐Crystal Solidification of Ni‐Based Superalloys
Authors: Sadeghi Fazlollah , Kermanpur Ahmad , Norouzi Ebrahim 
Published: October 2018

AbstractAn attempt is made to model the design of grain selection during single‐crystal solidification of an Ni‐based superalloy by the Bridgman method. Various geometrical designs of the starter block and spiral grain selector are chosen and their effects on crystal orientation of the single‐crystal part are studied. The competitive grain selection is simulated utilizing the cellular automaton finite element module of the ProCAST software. The simulated results are validated against the experimental observation of grain structure along with the crystal orientation measured by the electron backscatter diffraction (EBSD) and rotational orientation X‐ray diffraction (RO‐XRD) techniques. The results show that in order to obtain the single crystal with a minimum deviation from longitudinal axis, the height and diameter of the starter block as well as the height and the take‐off angle of the spiral should be optimized. It is found that the diameter/height ratio of the starter block should be less than 0.6 to obtain a well‐oriented single crystal prior to entrance of solidification front into the spiral. The height of starter block is found to be more influential than its diameter in selecting the suitable single grain.
Structural, Morphological, and Electrochemical Corrosion Properties of TiO2 Formed on Ti6Al4V Alloys by Anodization
Authors: Atmani Djamila , Saoula Nadia , Abdi Abderrezak , Azzaz Mohamed , Wang Youling , Mohamedi Mohamed 
Published: October 2018

AbstractIn this work, TiO2 layers are synthetized on Ti6Al4V alloy substrate by electrochemical anodizing process in fluoride‐containing alkaline electrolytes and under different applied voltages (10, 20, and 30 V). The scanning electron microscopy (SEM) reveals a nearly regular and vertical alignment of TiO2 nanotubes (≈80–100 nm) for specimen treated at 20 V and an agglomerate of particles with no particular orientations for those specimens treated at 10 and 30 V. The X‐ray diffraction (XRD) indicates the formation of mixed phases of anatase and rutile. Wettability measurements exhibit hydrophilic and superhydrophilic surfaces, according to the anodization parameters. The electrochemical impedance spectroscopy (EIS), performed in a simulated body fluid (Hank's solution), reveals an increase in corrosion resistance for a bias potential of 20 V (262 kΩ) owing to the evolution in TiO2‐layer thickness, and then decreases for higher anodizing potential values due to the chemical dissolution of the obtained layer.
Recent Advances in the Development of 5‐Hydroxymethylfurfural Oxidation with Base (Nonprecious)‐Metal‐Containing Catalysts
Authors: Pal Priyanka , Saravanamurugan Shunmugavel 
Published: October 2018

Abstract5‐Hydroxymethylfurfural (HMF) is one of the versatile platform molecules that can be derived from biomass, and a promising starting substrate for producing 2,5‐diformylfuran (DFF) and 2,5‐furandicarboxylic acid (FDCA). DFF is a platform chemical with applications in pharmaceuticals, macrocyclic ligands, and functional polymeric materials. Importantly, FDCA is being considered as a potential alternative to replace terephthalic acid for producing the bioplastic polyethylene furanoate, instead of polyethylene terephthalate, by blending with ethylene glycol. A significant number of studies have focused on the oxidation of HMF to FDCA with metal‐containing heterogeneous catalysts in both aqueous and organic media in the presence of peroxides/air/molecular oxygen as the oxidant. In this regard, articles have recently been published related to HMF oxidation with base (nonprecious)‐metal‐containing catalysts that exhibit appealing activity towards DFF or FDCA in terms of yield. Thus, this Minireview focuses on recent developments in efficient transformations of HMF to DFF and FDCA with base‐metal‐containing heterogeneous catalysts in aqueous and organic media. This review further focuses on the direct transformation of glucose/fructose to DFF and/or FDCA with nonprecious‐metal‐containing catalysts in various solvents. Photocatalytic approaches for HMF oxidation with nonprecious metal‐ containing catalysts are also briefly discussed.
Across the Board: Antonio Facchetti
Authors: Facchetti Antonio 
Published: October 2018

AbstractIn this series of articles, the board members of ChemSusChem discuss recent research articles that they consider of exceptional quality and importance for sustainability. This entry features Prof. Dr. Antonio Facchetti, who discusses the use of organic photovoltaic (OPV) devices as a source of renewable energy, and challenges that must be met for OPVs to serve as a viable fully sustainable technology for future energy production, taking into account the components used in such devices and their stability and durability.
Efficient and secure business model for content centric network using elliptic curve cryptography
Authors: Adhikari Sharmistha , Ray Sangram , Biswas Gosta P. , Obaidat Mohammad S. 
Published: October 2018

SummaryInitially, Internet has evolved as a resource sharing model where resources are identified by IP addresses. However, with rapid technological advancement, resources/hardware has become cheap and thus, the need of sharing hardware over Internet is reduced. Moreover, people are using Internet mainly for information exchange and hence, Internet has gradually shifted from resource sharing to information sharing model. To meet the recent growing demand of information exchange, Content Centric Network (CCN) is envisaged as a clean‐slate future network architecture which is specially destined for smooth content distribution over Internet. In CCN, content is easily made available using network caching mechanism which is misaligned with the existing business policy of content providers/publishers in IP‐based Internet. Hence, the transition from contemporary IP‐based Internet to CCN demands attention for redesigning the business policy of the content publishers/providers. In this paper, we have proposed efficient and secure communication protocols for flexible CCN business model to protect the existing business policies of the content publisher while maintaining the salient CCN features like in‐network content caching and Interest packet aggregation. To enhance the efficiency and security, the Elliptic Curve Cryptography (ECC) is used. The proposed ECC‐based scheme is analyzed to show that it is resilient to relevant existing cryptographic attacks. The performance analysis in terms of less computation and communication overheads and increased efficiency is given. Moreover, a formal security verification of the proposed scheme is done using widely used AVISPA simulator and BAN logic that shows our scheme is well secured.
Open science, reproducibility, and transparency in ecology
Authors: Powers Stephen M. , Hampton Stephanie E. 
Published: October 2018

AbstractReproducibility is a key tenet of the scientific process that dictates the reliability and generality of results and methods. The complexities of ecological observations and data present novel challenges in satisfying needs for reproducibility and also transparency. Ecological systems are dynamic and heterogeneous, interacting with numerous factors that sculpt natural history and that investigators cannot completely control. Observations may be highly dependent on spatial and temporal context, making them very difficult to reproduce, but computational reproducibility can still be achieved. Computational reproducibility often refers to the ability to produce equivalent analytical outcomes from the same data set using the same code and software as the original study. When coded workflows are shared, authors and editors provide transparency for readers and allow other researchers to build directly and efficiently on primary work. These qualities may be especially important in ecological applications that have important or controversial implications for science, management, and policy. Expectations for computational reproducibility and transparency are shifting rapidly in the sciences. In this work, we highlight many of the unique challenges for ecology along with practical guidelines for reproducibility and transparency, as ecologists continue to participate in the stewardship of critical environmental information and ensure that research methods demonstrate integrity.
Navigating fragmented landscapes: Canada lynx brave poor quality habitats while traveling
Authors: Vanbianchi Carmen , Gaines William L. , Murphy Melanie A. , Hodges Karen E. 
Published: October 2018

AbstractAnthropogenic and natural habitat fragmentation inhibit movement of animals through landscapes. An important challenge for connectivity conservation is determining which conditions facilitate or limit movements, so that these areas can be prioritized for protection or restoration. We examine Canada lynx Lynx canadensis habitat connectivity in the fragmented North Cascade Mountains of Washington, as an example of a highly mobile species that is specialized both on prey and in habitat needs. We identify lynx Habitat Concentration Areas based on Core Habitat Models, parameterize resistance surfaces from our Matrix Habitat Model, and develop linkages of habitat lynx use to move between patches of high quality habitat. We identify a number of linkages for lynx comprised of habitat conditions that differed from high quality core patches identified from our habitat modeling. Radio‐locations from lynx confirm lower‐quality habitats of low resistance to movement were used by traveling lynx. Our results thus suggest traveling lynx do indeed use a much broader range of habitats than do lynx moving within core areas. For lynx in the North Cascades, our results show that maintaining connectivity will require preserving habitats and linkages that would previously have been deemed unsuitable for lynx. Maintaining connectivity for lynx is particularly important given the many recent large wildfires in this region that have reduced the number of mature forest stands that form prime habitat for lynx. Policy implications. Our results strongly suggest that habitat connectivity models should be based on empirical information of animal location data and focused on matrix habitat analysis. Traveling predators use a wide suite of habitats, resulting in more and broader linkage zones that should inform conservation efforts. Failure to identify these areas of functional connectivity could result in the oversight of usable linkage zones, leaving them without protection and vulnerable to degradation.
Mechanistic modeling of environmental drivers of woolly mammoth carrying capacity declines on St. Paul Island
Authors: Wang Yue , Porter Warren , Mathewson Paul D. , Miller Paul A. , Graham Russell W. , Williams John W. 
Published: October 2018

AbstractOn St. Paul Island, a remnant of the Bering Land Bridge, woolly mammoths persisted until 5,600 yr BP with no known predators or competitors, providing a natural system for studying hypothesized environmental drivers of extinction. These include overheating due to rising temperatures, starvation, and drought. Here, we test these hypotheses using Niche Mapper and LPJ‐GUESS to mechanistically estimate mammoth metabolic rates and dietary and freshwater requirements and, from these, estimate variations in island carrying capacity on St. Paul for the last 17,000 yr. Population carrying capacity may have been several hundred individuals at the time of initial isolation from the mainland. Adult mammoths could have fasted for two to three months, indicating a necessary ability to access snow‐buried forage. During the Holocene, vegetation net primary productivity increased, but shrinking island area overrode increased net primary productivity (NPP), lowering carrying capacity to ~100 individuals. NPP and freshwater availability alternated as critical limiting factors for this island population during the environmental changes of the late Pleistocene and Holocene. Only two or three individuals could have been sustained by the freshwater surplus in crater lakes (up to 18 individuals under the most optimistic parameter sensitivity experiments), suggesting that the St. Paul mammoth population was highly dependent on coastal freshwater sources. The simulations are consistent with the available proxy data, while highlighting the need to retrieve new paleohydrological proxy records from the coastal lagoons to test model predictions. More broadly, these findings reinforce the vulnerability of island megaherbivore populations to resource limitation and extinction.
Hybrid inviability and differential submergence tolerance drive habitat segregation between two congeneric monkeyflowers
Authors: Toll Katherine , Willis John H. 
Published: October 2018

AbstractClosely related, ecologically similar species are often separated at small geographic scales while being broadly sympatric. Both adaptation to abiotic environmental conditions and a variety of biotic interactions may determine small‐scale allopatry. In Northern California's coast range, two monkeyflower species, Mimulus guttatus and Mimulus nudatus, can co‐occur within local sites but rarely overlap at fine spatial scales, even though they are often separated by less than 1 m. M. guttatus naturally grows in wetter areas and is often submerged for up to four months of the year, while M. nudatus naturally occupies drier sites. We used a combination of observational data, reciprocal transplant, and laboratory experiments to test a series of biotic and abiotic hypotheses for the observed distribution pattern. Although M. guttatus can tolerate dry hillside conditions like those in which M. nudatus occurs, M. nudatus is unable to survive submerged for more than a week, limiting its distribution from seasonal streams inundated for months and dominated by M. guttatus. While herbivores did not differentially damage species, transplants were more likely to be damaged in M. guttatus’ seep habitat and M. nudatus was less tolerant to herbivory. Individuals of each species transplanted into populations of heterospecific congeners produced large proportions (up to 80%) of inviable seeds resulting from increased hybridization rates in close sympatry. Mimulus nudatus’ inability to tolerate submergence and herbivory establishes some degree of habitat association, and then, hybrid seed inviability reduces the ability of the locally rarer species to persist within the congener's microhabitat and maintains habitat segregation. Together these data show that both environmental filtering and biotic interactions shape the fine‐scale distribution of close relatives.
IFITM proteins drive type 2 T helper cell differentiation and exacerbate allergic airway inflammation
Authors: Yánez Diana C. , Sahni Hemant , Ross Susan , Solanki Anisha , Lau Ching‐In , Papaioannou Eleftheria , Barbarulo Alessandro , Powell Rebecca , Lange Ulrike C. , Adams David J. , Barenco Martino , Ono Masahiro , D'Acquisto Fulvio , Furmanski Anna L. , Crompton Tessa 
Published: October 2018

AbstractThe interferon‐inducible transmembrane (Ifitm/Fragilis) genes encode homologous proteins that are induced by IFNs. Here, we show that IFITM proteins regulate murine CD4+ Th cell differentiation. Ifitm2 and Ifitm3 are expressed in wild‐type (WT) CD4+ T cells. On activation, Ifitm3 was downregulated and Ifitm2 was upregulated. Resting Ifitm‐family‐deficient CD4+ T cells had higher expression of Th1‐associated genes than WT and purified naive Ifitm‐family‐deficient CD4+ T cells differentiated more efficiently to Th1, whereas Th2 differentiation was inhibited.Ifitm‐family‐deficient mice, but not Ifitm3‐deficient mice, were less susceptible than WT to induction of allergic airways disease, with a weaker Th2 response and less severe disease and lower Il4 but higher Ifng expression and IL‐27 secretion. Thus, the Ifitm family is important in adaptive immunity, influencing Th1/Th2 polarization, and Th2 immunopathology.
Brief Pain Inventory: A proposal to extend its clinical application
Authors: Bonafé Fernanda Salloume Sampaio , de Campos Lucas Arrais , Marôco João , Campos Juliana Alvares Duarte Bonini 
Published: October 2018

AbstractBackgroundThis study presents an adaptation of the Brief Pain Inventory (BPI) extending its use in clinical/epidemiological contexts and the evaluation of the properties of BPI (short form) in a sample of Brazilian adults.MethodsPart of item 1 of this instrument was removed because it prevented the participation of individuals with usual pain. In addition to the reference period of original response “last 24 hr,” a new period “last pain experience” was proposed. Individuals responded about the presence/lack and onset of pain. Individuals who reported pain in the last 24 hr before the interview answered the BPI considering both reference periods. Confirmatory factor analysis was performed to check the fit of five theoretical BPI models.ResultsA total of 1,176 adults participated (79.0% women; 38.7 (SD = 10.8) years), 29.2% did not report pain in the last 24 hr, 33.6% reported pain <3 months and 37.2% pain ≥3 months. All theoretical BPI models presented adequate fit indices (GFI ≥ 0.9; RMSEA < 0.1; α ≥ 0.7) when both reference periods were used. In conclusion, the adaptations proposed can contribute to extend the use of BPI.ConclusionsThe reference period of responses and the theoretical model used must be chosen according to the needs of the researcher and/or physician.SignificanceThis study presents evidence related to the validity of applying the Brief Pain Inventory (BPI) in adults with and without pain considering the present pain or memory of pain, enabling the clinician to collect additional information that may be relevant to the clinical management of pain.
Heat pump system assessment for a groundwater‐source municipal drinking water utility
Authors: Wang Xiaolong , Zhu Jun‐Jie , Anderson Paul R. 
Published: October 2018

Compared to a typical heating, ventilation, and air conditioning (HVAC) system, a groundwater source heat pump (GSHP) system should have lower operating costs and greenhouse gas emissions, providing economic and environmental advantages for a ground water‐based municipal water utility. This article describes a test of that hypothesis, involving simulations and evaluations of the economic performance of the above two systems for a model office building in five major U.S. climate zones. The cost–benefit analysis suggests that a GSHP system in climate zone 5 (Chicago‐region) has the best return on investment, whereas climate zone 2 (Phoenix‐region) is not economically promising. Relative to a reference HVAC system, the GSHP system has lower carbon emissions in each of the five climate zones, with the greatest reduction of carbon emissions occurring in climate zone 5 (Chicago‐region).
Significance: When faced with decisions about hot water supply and space heating and cooling, relative to drinking water utilities that rely on surface waters, groundwater‐based utilities have ready access to groundwater source heat pumps (GSHPs) that should offer better energy efficiency and lower greenhouse gas emissions. These advantages, however, will depend on regional climate conditions and the course of electrical energy. A better understanding of GSHP performance in different climate zones will provide the information needed to make these decisions. © 2018 American Institute of Chemical Engineers Environ Prog, 38:e13047, 2019
Constant‐ductility inelastic displacement ratios for displacement‐based seismic design of self‐centering structures
Authors: De Francesco Giovanni 
Published: October 2018

SummaryThis paper focuses on constant‐ductility inelastic displacement ratios of self‐centering single‐degree‐of‐freedom (SDF) systems with two different levels of energy dissipation capacity, in the presence of 5% viscous damping ratio. A statistical analysis is developed considering an earthquake database composed of 228 ground motions recorded in California with magnitudes greater than six and organized for NEHRP soil class, ground motion duration, and peak ground acceleration. The response of self‐centering SDF systems with large variability of initial periods, ductility levels, and postyield stiffness ratios is investigated and compared with the responses of SDF systems with bilinear plastic, Clough, and Takeda hysteresis. The inelastic demand variation with soil class, initial period, postyield stiffness ratio, unloading stiffness degradation, ductility level, and hysteretic behavior is highlighted. Simple and conservative analytical estimates of constant‐ductility inelastic displacement ratios for mean and 90th percentile values in terms of initial period, ductility level, and postyield stiffness ratio are proposed to allow the extension of the Displacement‐Based Design via Inelastic Displacement Ratio (CμDBD) to self‐centering structural systems.