bluuebunny/crossref_metadata_2025_split huggingface dataset:
Subdivision Schemes for Quadrilateral Meshes with the Least Polar Artifact in Extraordinary Regions
Authors: Ma Yue , Ma Weiyin 
Published: November 2019

AbstractThis paper presents subdivision schemes with subdivision stencils near an extraordinary vertex that are free from or with substantially reduced polar artifact in extraordinary regions while maintaining the best possible bounded curvature at extraordinary positions. The subdivision stencils are firstly constructed to meet tangent plane continuity with bounded curvature at extraordinary positions. They are further optimized towards curvature continuity at an extraordinary position with additional measures for removing or for minimizing the polar artifact in extraordinary regions. The polar artifact for subdivision stencils of lower valences is removed by applying an additional constraint to the subdominant eigenvalue to be the same as that of subdivision at regular vertices, while the polar artifact for subdivision stencils of higher valances is substantially reduced by introducing an additional thin‐plate energy function and a penalty function for maintaining the uniformity and regularity of the characteristic map. A new tuned subdivision scheme is introduced by replacing subdivision stencils of Catmull‐Clark subdivision with that from this paper for extraordinary vertices of valences up to nine. We also compare the refined meshes and limit surface quality of the resulting subdivision scheme with that of Catmull‐Clark subdivision and other tuned subdivision schemes. The results show that subdivision stencils from our method produce well behaved subdivision meshes with the least polar artifact while maintaining satisfactory limit surface quality.
Light Field Video Compression and Real Time Rendering
Authors: Hajisharif Saghi , Miandji Ehsan , Larsson Per , Tran Kiet , Unger Jonas 
Published: November 2019

AbstractLight field imaging is rapidly becoming an established method for generating flexible image based description of scene appearances. Compared to classical 2D imaging techniques, the angular information included in light fields enables effects such as post‐capture refocusing and the exploration of the scene from different vantage points. In this paper, we describe a novel GPU pipeline for compression and real‐time rendering of light field videos with full parallax. To achieve this, we employ a dictionary learning approach and train an ensemble of dictionaries capable of efficiently representing light field video data using highly sparse coefficient sets. A novel, key element in our representation is that we simultaneously compress both image data (pixel colors) and the auxiliary information (depth, disparity, or optical flow) required for view interpolation. During playback, the coefficients are streamed to the GPU where the light field and the auxiliary information are reconstructed using the dictionary ensemble and view interpolation is performed. In order to realize the pipeline we present several technical contributions including a denoising scheme enhancing the sparsity in the dataset which enables higher compression ratios, and a novel pruning strategy which reduces the size of the dictionary ensemble and leads to significant reductions in computational complexity during the encoding of a light field. Our approach is independent of the light field parameterization and can be used with data from any light field video capture system. To demonstrate the usefulness of our pipeline, we utilize various publicly available light field video datasets and discuss the medical application of documenting heart surgery.
HidingGAN: High Capacity Information Hiding with Generative Adversarial Network
Authors: Wang Zihan , Gao Neng , Wang Xin , Xiang Ji , Zha Daren , Li Linghui 
Published: November 2019

AbstractImage steganography is the technique of hiding secret information within images. It is an important research direction in the security field. Benefitting from the rapid development of deep neural networks, many steganographic algorithms based on deep learning have been proposed. However, two problems remain to be solved in which the most existing methods are limited by small image size and information capacity. In this paper, to address these problems, we propose a high capacity image steganographic model named HidingGAN. The proposed model utilizes a new secret information preprocessing method and Inception‐ResNet block to promote better integration of secret information and image features. Meanwhile, we introduce generative adversarial networks and perceptual loss to maintain the same statistical characteristics of cover images and stego images in the high‐dimensional feature space, thereby improving the undetectability. Through these manners, our model reaches higher imperceptibility, security, and capacity. Experiment results show that our HidingGAN achieves the capacity of 4 bits‐per‐pixel (bpp) at 256 × 256 pixels, improving over the previous best result of 0.4 bpp at 32 × 32 pixels.
A Color‐Pair Based Approach for Accurate Color Harmony Estimation
Authors: Yang B. , Wei T. , Fang X. , Deng Z. , Li F. W. B. , Ling Y. , Wang X. 
Published: November 2019

AbstractHarmonious color combinations can stimulate positive user emotional responses. However, a widely open research question is: how can we establish a robust and accurate color harmony measure for the public and professional designers to identify the harmony level of a color theme or color set. Building upon the key discovery that color pairs play an important role in harmony estimation, in this paper we present a novel color‐pair based estimation model to accurately measure the color harmony. It first takes a two‐layer maximum likelihood estimation (MLE) based method to compute an initial prediction of color harmony by statistically modeling the pair‐wise color preferences from existing datasets. Then, the initial scores are refined through a back‐propagation neural network (BPNN) with a variety of color features extracted in different color spaces, so that an accurate harmony estimation can be obtained at the end. Our extensive experiments, including performance comparisons of harmony estimation applications, show the advantages of our method in comparison with the state of the art methods.
Image Composition of Partially Occluded Objects
Authors: Tan Xuehan , Xu Panpan , Guo Shihui , Wang Wencheng 
Published: November 2019

AbstractImage composition extracts the content of interest (COI) from a source image and blends it into a target image to generate a new image. In the majority of existing works, the COI is manually extracted and then overlaid on top of the target image. However, in practice, it is often necessary to deal with situations in which the COI is partially occluded by the target image content. In this regard, both tasks of extracting the COI and cropping its occluded part require intensive user interactions, which are laborious and seriously reduce the composition efficiency. This paper addresses the aforementioned challenges by proposing an efficient image composition method. First, we extract the semantic contents of the images by using state‐of‐the‐art deep learning methods. Therefore, the COI can be selected with clicks only, which can greatly reduce the demanded user interactions. Second, according to the user's operations (such as translation or scale) on the COI, we can effectively infer the occlusion relationships between the COI and the contents of the target image. Thus, the COI can be adaptively embedded into the target image without concern about cropping its occluded part. Therefore, the procedures of content extraction and occlusion handling can be significantly simplified, and work efficiency is remarkably improved. Experimental results show that compared to existing works, our method can reduce the number of user interactions to approximately one‐tenth and increase the speed of image composition by more than ten times.
ShutterApp: Spatio‐temporal Exposure Control for Videos
Authors: Salamon Nestor Z. , Billeter Markus , Eisemann Elmar 
Published: November 2019

AbstractA camera's shutter controls the incoming light that is reaching the camera sensor. Different shutters lead to wildly different results, and are often used as a tool in movies for artistic purpose, e.g., they can indirectly control the effect of motion blur. However, a physical camera is limited to a single shutter setting at any given moment. ShutterApp enables users to define spatio‐temporally‐varying virtual shutters that go beyond the options available in real‐world camera systems. A user provides a sparse set of annotations that define shutter functions at selected locations in key frames. From this input, our solution defines shutter functions for each pixel of the video sequence using a suitable interpolation technique, which are then employed to derive the output video. Our solution performs in real‐time on commodity hardware. Hereby, users can explore different options interactively, leading to a new level of expressiveness without having to rely on specialized hardware or laborious editing.
Childhood diffuse parenchymal lung diseases: We need a new classification
Authors: Cinel Güzin , Kiper Nural , Orhan Diclehan , Emiralioğlu Nagehan , Yalçın Ebru , Doğru Deniz , Özçelik Uğur , Oğuz Berna , Haliloğlu Mithat 
Published: November 2019

AbstractIntroductionChildhood diffuse parenchymal lung diseases (DPLD) are a heterogeneous group of respiratory disorders of both known and unknown causes that share common histological features. To date, there is not an exact consensus about the terminology, classification, therapy and follow up of this disease because of its rarity and wide clinical spectrum.ObjectivesIn this study, we tried to classify our DPLD patients according to the last classification scheme (chILD Network Classification).MethodsThe files of the children diagnosed with DPLD at our university hospital between 1974 and 2012 were retrospectively investigated. Clinical features, laboratory, radiological and histopathological findings, therapy and follow‐up outcomes of these patients were recorded and evaluated according to the actual information and definitions.ResultsWe described 130 DPLD patients, the largest childhood DPLD series from a single center, classified in 16 distinct groups according to their diagnosis. Our largest group in this serie is pulmonary hemosiderosis (28.5%); idiopathic interstitial pneumonias, pulmonary hemosiderosis, sarcoidosis and lipid storage diseases with lung involvement represent the 70% of the diagnoses. When we classified our patients according to the chILD Network Classification; patients with idiopathic interstitial pneumonia older than 2 years, idiopathic pulmonary hemosiderosis, pulmonary alveolar microlithiasis and diffuse chondroid malformation of the lung stayed out of this classification.ConclusionTo ensure a consensus about the therapy and follow up, we have to make revisions and reorganisations on the DPLD classification which was proposed in 2007. We need a new childhood DPLD classification that will cover all these disease groups.
Characteristics and outcome of adult patients with acute promyelocytic leukemia and increased body mass index treated with the PETHEMA Protocols
Authors: Sobas Marta , Rodriguez‐Veiga Rebeca , Vellenga Edo , Paluszewska Monika , De la Serna Javier , García‐Álvarez Flor , Gil Cristina , Brunet Salut , Bergua Juan , González‐Campos Jose , Ribera José María , Tormo Mar , González Marcos , Fernández Isolda , Benavente Celina , González‐Sanmiguel Jose D. , Esteve Jordi , Pérez‐Encinas Manuel , Salamero Olga , Manso Felix , Lowenberg Bob , Sanz Miguel A. , Montesinos Pau ,   On behalf of the PETHEMA, HOVON, PALG, GATLA cooperative groups
Published: November 2019

AbstractObjectiveThe obesity/overweight may have an influence on APL outcomes.MethodsThis is the biggest multicentre analysis on 1320 APL patients treated with AIDA‐induction and risk‐adapted consolidation between 1996 and 2012. Patients body mass index (BMI) was classified as underweight (<18.5 kg/m2), normal (18.5‐25 kg/m2), overweight (25‐29.9 kg/m2), and obese (≥30 kg/m2) according to the World Health Organization (WHO) criteria.Results and conclusionsRelationship between male gender, older age, and other known laboratory abnormalities in overweight/obese patients was significant. The induction mortality rate was significantly higher in APL with BMI ≥25 vs BMI <25 (10% vs 6%; P = .04). APL patients with BMI ≥25 had a trend to lower OS (74% vs 80%; P = .06). However, in the multivariate analysis, BMI did not retain the independent predictive value (P = .46). There was no higher incidence of differentiation syndrome with BMI ≥25, but there was a trend in obese. There was no difference in relapse rate according to the BMI. In summary, overweight/obesity does not represent an independent risk factor for APL outcomes. The influence of obesity in APL patients treated with chemotherapy‐free regimens remains to be established.
A pathway for assembling [4Fe‐4S]2+ clusters in mitochondrial iron–sulfur protein biogenesis
Authors: Nasta Veronica , Suraci Dafne , Gourdoupis Spyridon , Ciofi‐Baffoni Simone , Banci Lucia 
Published: November 2019

During its late steps, the mitochondrial iron–sulfur cluster (ISC) assembly machinery leads to the formation of [4Fe‐4S] clusters. In vivo studies revealed that several proteins are implicated in the biosynthesis and trafficking of [4Fe‐4S] clusters in mitochondria. However, they do not provide a clear picture into how these proteins cooperate. Here, we showed that three late‐acting components of the mitochondrial ISC assembly machinery (GLRX5, BOLA3, and NFU1) are part of a ISC assembly pathway leading to the synthesis of a [4Fe‐4S]2+ cluster on NFU1. We showed that the [2Fe‐2S]2+ GLRX5‐BOLA3 complex transfers its cluster to monomeric apo NFU1 to form, in the presence of a reductant, a [4Fe‐4S]2+ cluster bound to dimeric NFU1. The cluster formation on NFU1 does not occur with [2Fe‐2S]2+ GLRX5, and thus, the [4Fe‐4S] cluster assembly pathway is activated only in the presence of BOLA3. These results define NFU1 as an ‘assembler’ of [4Fe‐4S] clusters, that is, a protein able of converting two [2Fe‐2S]2+ clusters into a [4Fe‐4S]2+ cluster. Finally, we found that the [4Fe‐4S]2+ cluster bound to NFU1 has a coordination site which is easily accessible to sulfur‐containing ligands, as is typically observed in metallochaperones. This finding supports a role for NFU1 in promoting rapid and controlled cluster‐exchange reaction.
Analytical validation of the iSED automated analyzer for erythrocyte sedimentation rate
Authors: Lapić Ivana , Miloš Marija , Tosato Francesca , Piva Elisa , Zadro Renata , Rogić Dunja , Plebani Mario 
Published: November 2019

AbstractIntroductioniSED is an alternate automated analyzer for erythrocyte sedimentation rate (ESR) based on photometric rheology technology that estimates ESR by measuring rouleaux formation. The aim was to evaluate the analytical performance of the iSED analyzer and compare the results with the Westergren method and another alternate ESR analyzer, TEST1.MethodsValidation was performed at two study sites according to the recommendations by the International Council for Standardization in Haematology and included determination of intrarun precision and inter‐run precision, bias, carryover, and method comparison, which was further assessed for samples with normal and low hematocrit, as well as per low, middle, and upper third of the analytical range.ResultsIntrarun coefficients of variation (CVs) with commercial controls were 4.0% and 1.8%, while inter‐run CVs 7.5% and 0.7%, for the normal and pathological range, respectively. Intrarun CVs obtained with patient samples were 19.9%, 9.9%, 10.3%, and 9.4%, the highest being for the lowest ESR value. Correlation coefficients for the comparison between iSED and Westergren were 0.862 (Site‐1) and 0.916 (Site‐2). While proportional difference with a positive bias was revealed at Site‐1, comparison at Site‐2 showed both constant and proportional difference and a negligible negative bias. Higher correlation was obtained for samples with low than normal hematocrit. Comparison between iSED and TEST1 yielded a correlation coefficient of 0.986, constant and proportional difference, and positive bias. Carryover was 3.2%.ConclusionThis study proved the analytical validity of the iSED analyzer, despite minor discrepancies to the Westergren method that can be attributed to methodological differences.
A new species of Cambeva (Siluriformes, Trichomycteridae) from the Rio Ivaí basin, Upper Rio Paraná basin, Paraná State, Brazil
Authors: dos Reis Renan B. , Frota Augusto , Fabrin Thomaz M. C. , da Graça Weferson J. 
Published: November 2019

AbstractA new species of Cambeva endemic to the Rio Ivaí basin, Upper Paraná basin, is described combining morphological and molecular data. This new species is distinguished from all congeners by characters related to the number of pectoral‐fin rays, to the colour pattern of the dorsal and lateral surface of the body, to the presence of diffuse blotches in the ventral surface of body, to the presence of a pelvic‐fin and pelvic girdle, to the number of odontodes in the inter‐opercular and opercular patches, to the number of dorsal and ventral procurrent rays. In addition, the analysis of mitochondrial DNA sequences identified a satisfactory genetic distance between this new species and its congeners. The new species from the Rio Ivaí reinforces its characteristics as an area of endemism for fishes in the Upper Rio Paraná basin.
Appendicular morphology and locomotor performance of two morphotypes of continental anoles: Anolis heterodermus and Anolis tolimensis
Authors: Ríos‐Orjuela Juan Camilo , Camacho‐Bastidas Juan Sebastián , Jerez Adriana 
Published: November 2019

AbstractAnolis lizards have been a model of study in ecomorphology in the Caribbean islands because species with the same type of microhabitat share similar morphological features. But despite their great diversity, little is known about continental species. We analyzed the relationship between the anatomical characteristics of the appendicular skeleton and the locomotor performance of two Anolis species found in Colombia that have different use of habitat. Anolis heterodermus, a strictly arboreal species, was compared with Anolis tolimensis, which inhabits the lower strata of vegetation. These two species differ in their body plan not only in body shape and external morphological features, but also in the skeleton and appendicular musculature. The results highlight the muscle and bone specializations associated with the use of habitat in this genus, such as the presence of more robust bones to enlarge the surface of muscle insertion, the thickening and loss of carpal parts, thickening of tendons associated with the manus, and greater development of muscle mass in the forelimbs by A. heterodermus with respect to A. tolimensis. These differences are related to the use of the microhabitat and the locomotor style of each species.
Pharmacokinetics of cefonicid in lactating goats after intravenous, intramuscular and subcutaneous administration, and after a long‐acting formulation for subcutaneous administration
Authors: Badillo Elena , Escudero Elisa , Hernandis Verónica , Galecio Juan Sebastián , Marín Pedro 
Published: November 2019

AbstractThe single‐dose disposition kinetics of cefonicid were determined in clinically normal lactating goats (n = 6) after intravenous (IV), intramuscular (IM) and subcutaneous (SC) administration of a conventional formulation, and after subcutaneous administration of a long‐acting formulation (SC‐LA). Cefonicid concentrations were determined by high performance liquid chromatography with ultraviolet detection. The concentration–time data were analysed by noncompartmental pharmacokinetic methods. Steady‐state volume of distribution (Vss) and clearance (Cl) of cefonicid after IV administration were 0.14 ± 0.03 L/kg and 0.51 ± 0.07 L/h·kg, respectively. Following IM, SC and SC‐LA administration, cefonicid achieved maximum plasma concentrations of 14.46 ± 0.82, 11.98 ± 1.92 and 17.17 ± 2.45 mg/L at 0.26 ± 0.13, 0.42 ± 0.13 and 0.83 ± 0.20 hr, respectively. The absolute bioavailabilities after IM, SC and SC‐LA routes were 75.34 ± 11.28%, 71.03 ± 19.14% and 102.84 ± 15.155%, respectively. After cefonicid analysis from milk samples, no concentrations were found above LOQ at any sampling time. From these data, cefonicid administered at 20 mg/kg each 12 hr after SC‐LA could be effective to treat bacterial infections in lactating animals not affected by mastitis problems.
Value from Control: Subjective Valuations of Negotiations by Principals and Agents
Authors: Amit Adi 
Published: November 2019

AbstractThe use of agents in negotiations is ubiquitous. Little is known, however, about the divergent psychological experiences of agents and principals in negotiations and their potential downstream consequences. The current research investigated how one’s role in a negotiation (as a principal or an agent) affects feelings of control, and how these feelings determine subjective value. In Studies 1 and 2, participants were randomly assigned to role‐play principals or agents in deal‐making negotiations. In both studies, agents reported feeling more control than principals, and control positively predicted the subjective value derived from the negotiation. In Studies 3 and 4, experimentally enhancing feelings of control influenced subjective value for principals. These findings point to the potential psychological costs of using agents. The findings advance research on subjective value in negotiations and highlight the critical role of control in principal–agent relationships.
Exceptional preservation requires fast biodegradation: thylacocephalan specimens from La Voulte‐sur‐Rhône (Callovian, Jurassic, France)
Authors: Jauvion Clément , Bernard Sylvain , Gueriau Pierre , Mocuta Cristian , Pont Sylvain , Benzerara Karim , Charbonnier Sylvain 
Published: November 2019

AbstractKonservat‐Lagerstätten are seen as snapshots of past biodiversity for a given location and time. However, processes leading to the exceptional morphological preservation of fossils in these deposits remain incompletely understood. This results in a deficient assessment of taphonomic biases and limits the robustness/relevance of palaeobiological reconstructions. Here, we report the mineralogical characterization of crustacean fossils preserved within carbonate‐rich concretions from the Jurassic Konservat‐Lagerstätte of La Voulte‐sur‐Rhône (Ardèche, France). The combination of SEM‐EDS, TEM, synchrotron‐based XRF, XRD and XANES allows the mineralogical phases composing these fossils (i.e. fluorapatite, Fe‐sulfides (pyrite, pyrrhotite) and Mg‐calcite) and the surrounding matrix (i.e. Mg‐calcite, clays and detrital silicates) to be identified. Fluorapatite and pyrite (and pyrrhotite) precipitated during decay under anoxic conditions, replacing delicate organic structures and preserving anatomical details. These mineral structures were subsequently consolidated by a Mg‐calcite cement. Of note, histologically similar tissues were replaced by the same mineral phases, confirming that fossilization (in La Voulte) occurred rapidly enough to be influenced by tissue composition. Altogether, the present study shows that exceptional preservation requires fast biodegradation, thereby confirming recent experimental evidence.
The philosophy of linguistics: Scientific underpinnings and methodological disputes
Authors: Nefdt Ryan M. 
Published: November 2019

AbstractThis article surveys the philosophical literature on theoretical linguistics. The focus of the paper is centred around the major debates in the philosophy of linguistics, past and present, with specific relation to how they connect to the philosophy of science. Specific issues such as scientific realism in linguistics, the scientific status of grammars, the methodological underpinnings of formal semantics, and the integration of linguistics into the larger cognitive sciences form the crux of the discussion.