bluuebunny/crossref_metadata_2025_split huggingface dataset:
Highly Polarized Coumarin Derivatives Revisited: Solvent‐Controlled Competition Between Proton‐Coupled Electron Transfer and Twisted Intramolecular Charge Transfer
Authors: Morawski Olaf W. , Kielesiński Łukasz , Gryko Daniel T. , Sobolewski Andrzej L. 
Published: March 2020

AbstractLinking a polarized coumarin unit with an aromatic substituent via an amide bridge results in weak electronic coupling that affects the intramolecular electron‐transfer (ET) process. As a result of this, interesting solvent‐dependent photophysical properties can be observed. In polar solvents, electron transfer in coumarin derivatives of this type induces a mutual twist of the electron‐donating and ‐accepting molecular units (TICT process) that facilitates radiationless decay processes (internal conversion). In the dyad with the strongest intramolecular hydrogen bond, the planar form is stabilized, such that twisting can only occur in highly polar solvents, whereas a fast proton‐coupled electron‐transfer (PCET process) occurs in nonpolar n‐alkanes. The kPCET rate constant decreases linearly with the energy of the fluorescence maximum in different solvents. This observation can be explained in terms of competition between electron‐ and proton‐transfer from a highly polarized (ca. 15 D) and fluorescent locally excited (1LE) state to a much less polarized (ca. 4 D) charge‐transfer (1CT) state, a unique occurrence. Photophysical measurements performed for a family of related coumarin dyads, together with results of quantum‐chemical computations, give insight into the mechanism of the ET process, which is followed by either a TICT or a PCET process. Our results reveal that dielectric solvation of the excited state slows down the PCET process, even in nonpolar solvents.
Iron(0)‐Mediated Stereoselective (3+2)‐Cycloaddition of Thiochalcones via a Diradical Intermediate
Authors: Buday Philipp , Seeber Phillip , Zens Clara , Abul‐Futouh Hassan , Görls Helmar , Gräfe Stefanie , Matczak Piotr , Kupfer Stephan , Weigand Wolfgang , Mloston Grzegorz 
Published: March 2020

AbstractReactions of α,β‐unsaturated aromatic thioketones 1 (thiochalcones) with Fe3(CO)12 leading to η4‐1‐thia‐1,3‐diene iron tricarbonyl complexes 2, [FeFe] hydrogenase mimics 3, and the thiopyrane adduct 4 are described. Obtained products have been characterized by X‐ray crystallography and by computational methods. Completely regio‐ and diastereoselective formation of the five‐membered ring system in products 3, containing four stereogenic centers, can be explained by an unprecedented, stepwise (3+2)‐cycloaddition of two thiochalcone molecules mediated by Fe3(CO)12. Quantum chemical calculations aimed at elucidation of the reaction mechanism, suggest that the formal (3+2)‐cycloaddition proceeds via sequential intramolecular radical transfer events upon homolytic cleavage of one carbon‐sulfur bond leading to a diradical intermediate.
A conflict‐free replicated data type for collaborative annotation systems
Authors: Zarzour Hafed , Jararweh Yaser 
Published: March 2020

SummaryWith the advent of Web 2.0, numerous collaborative annotation systems have been developed in an effort to enable distant users to annotate the same multimedia resources such as texts, audio, images, and videos. However, the existing systems do not support the semantic aspect of the data available on the Web and ignore the convergence aspect when executing concurrent annotations. Based on the technologies of Semantic Web, this article presents a new conflict‐free replicated data type called OAC‐Set, which extends Open Annotation Collaboration data model to enable concurrent annotations while guaranteeing convergence, causality, and intention preservation criteria. The experimental results show that our approach is efficient and effective.
RSCVC: Row‐based semantic cache with incremental versioning consistency
Authors: Yang Zhe , Ma Kun , Zhang Xiaoli , Cui Lizhen , Yang Bo 
Published: March 2020

SummaryIn the mobile computing environment, how to make the data access more efficient is a challenge due to the narrow communication bandwidth, the frequent disconnections of network, and the limited resources. Therefore, it is necessary to cache data on the client side. Besides, a good cache consistency method is essential to ensure the correctness. In this article, a row‐based semantic cache with incremental versioning consistency (RSCVC) is proposed. In RSCVC, we designed a semantic cache algorithm, a query trimming and optimizing algorithm, and a version‐based consistency strategy. This RSCVC cache mainly has two advantages. On one hand, it can obviously improve the response time of query and the hit ratio of the cache. On the other hand, the version‐based consistency enhances the stability of the system especially in high‐concurrency situations. Experiments demonstrate the efficacy of our proposed method and its superiority to state‐of‐the‐art methods.
Tesia: A trusted efficient service evaluation model in Internet of things based on improved aggregation signature
Authors: Li Fengyin , Ge Rui , Zhou Huiyu , Wang Yilei , Liu Zhongxing , Yu Xiaomei 
Published: March 2020

SummaryService evaluation model is an essential ingredient in service‐oriented Internet of things (IoT) architecture. Generally, traditional models allow each user to submit their comments with respect to IoT services individually. However, these kind of models are fragile to resist various attacks, like comment denial attacks, and Sybil attacks, which may decrease the comments submission rate. In this article, we propose a new aggregation digital signature scheme to resolve the problem of comments aggregation, which may aggregate different comments into one with high efficiency and security level. Based on the new aggregation digital signature scheme, we further put forward a new service evaluation model named Tesia allowing specific users to submit the comments as a group in IoT networks. More specifically, they aggregate comments and assign one user as a submitter to submit these comments. In addition, we introduce the synchronization token mechanism into the new service evaluation model, to assure that all users in the group may sign their comments one by one, and the last one who receives the token is assigned as the final submitter. Tesia has more acceptable robustness and can greatly improve the comments submission rate with rather lower submission delay
time.
Annealing of Strontium Titanate Based Thermoelectric Materials by Graphite: Mechanistic Analysis by Spectroscopic and Chromatographic Techniques
Authors: Lee Alex Chinghuan , Qin Mengjie , Li Haoran , Shi Zongmo , Xu Jie , Gao Feng , Chen Yongsheng 
Published: March 2020

AbstractStrontium titanate (SrTiO3) based materials are promising for high‐temperature thermoelectric applications. In order to enhance their performance, annealing is usually required and carried out under various atmospheres. Annealing with graphite is quite effective, but the mechanism is not yet clear. In this work, we use IR spectroscopy and gas chromatography (GC) to monitor the chemical environment under the annealing conditions (1350 °C for 8 h under 16.9 mL/min N2 with graphite) and quantify the various gases evolved in the process. It is shown that reducing agents, H2 and CO (concentrations peaked at ca. 0.4–0.5 %), are generated from graphite in the annealing process. H2 is produced in carbon gasification reaction, which also generates CO. Additional CO is produced from incomplete combustion of carbon. In the annealing of a La‐doped SrTiO3‐based ceramic with graphite, higher levels of H2O and CO2 are detected, which is resulted from the reduction of the ceramic by H2 and CO, respectively. About 67 % of the oxygen vacancies were created by CO reduction while about 33 % by H2 reduction. The conclusions are well supported by direct weight loss measurements with a difference of less than 6 %.
E‐health education interventions on HbA1c in patients with type 1 diabetes on intensive insulin therapy: A systematic review and meta‐analysis of randomized controlled trials
Authors: Feigerlová Eva , Oussalah Abderrahim , Zuily Stéphane , Sordet Stéphanie , Braun Marc , Guéant Jean‐Louis , Guerci Bruno 
Published: March 2020

AbstractAimsPatient‐centered education improves glycemic control in subjects with type 1 diabetes (T1D). E‐health technologies are widely used to support medical decision‐making, patient advising or teleconsultations; however, the active participation of a patient is missing. Challenges remain whether e‐health education can be effectively incorporated into clinical pathways. The purpose of the study was to examine the effects of e‐health education, compared to standard care, on HbA1c.Material and methodsWe conducted a literature search (EMBASE, MEDLINE, The Cochrane Library and Web of Science) up to February 2018 for randomized controlled trials (RCTs) of Internet−/ mobile application‐based educational interventions, with the active involvement of patients, provided in addition to, or substituting usual care in patients with T1D on intensive insulin therapy. The primary outcome was the standardized difference in means (SDM) of HbA1c change from baseline between intervention and comparator groups.ResultsEight RCTs involving 757 subjects were included on 6335 screened citations. After excluding two trials with a high risk of bias from the meta‐analysis, the HbA1c change from baseline did not significantly differ between intervention and comparator groups (SDM = −0.154, 95% CI: −0.335 to 0.025; P = 0.01, random‐effect model). The number of studies is limited with a relatively short duration. Reporting of educational outcomes was not rigorous.ConclusionsThe effect of e‐health educational interventions on HbA1c in patients with T1D is comparable to the standard care. This review highlights the need for further well‐designed RCTs that will investigate the opportunities of incorporating e‐health education into clinical pathways.
Different processes shape the patterns of divergence in the nuclear and chloroplast genomes of a relict tree species in East Asia
Authors: Tian Xiang‐Yu , Ye Jun‐Wei , Wang Tian‐Ming , Bao Lei , Wang Hong‐Fang 
Published: March 2020

AbstractIsolation by spatial distance (IBD), environment (IBE), and historical climatic instability (IBI) are three common processes assessed in phylogeographic and/or landscape genetic studies. However, the relative contributions of these three processes with respect to spatial genetic patterns have seldom been compared. Moreover, whether the relative contribution differs in different regions or when assessed using different genetic markers has rarely been reported. Lindera obtusiloba has been found to have two sister genetic clades of chloroplast (cpDNA) and nuclear microsatellite (nSSR), both of which show discontinuous distribution in northern and southern East Asia. In this study, we used the Mantel test and multiple matrix regression with randomization (MMRR) to determine the relative contributions of IBD, IBE, and IBI with respect to L. obtusiloba populations. Independent Mantel tests and MMRR calculations were conducted for two genetic data sets (cpDNA and nSSR) and for different regions (the overall species range, and northern and southern subregions of the range). We found a significant IBI pattern in nSSR divergence for all assessed regions, whereas no clear IBI pattern was detected with respect to cpDNA. In contrast, significant (or marginal) divergent IBD patterns were detected for cpDNA in all regions, whereas although a significant IBE was apparent with respect to the overall range, the effect was not detected in the two subregions. The differences identified in nSSR and cpDNA population divergence may be related to differences in the heredity and ploidy of the markers. Compared with the southern region, the northern region showed less significant correlation patterns, which may be related to the shorter population history and restricted population range. The findings of this study serve to illustrate that comparing between markers or regions can contribute to gaining a better understanding the population histories of different genomes or within different regions of a species' range.
Impairment of myocardial perfusion correlates with heart failure severity in patients with non‐compaction cardiomyopathy
Authors: Cerar Andraz , Jaklic Martina , Frljak Sabina , Poglajen Gregor , Zemljic Gregor , Guzic Salobir Barbara , Dolenc Novak Maja , Stalc Monika , Zbacnik Rok , Kozelj Mirta 
Published: March 2020

ABSTRACTAimsNon‐compaction cardiomyopathy (NCM) is a congenital heart disease characterized by an arrest of the myocardial compaction process. Although NCM patients have impaired formation of microvasculature, the functional impact of these changes remains undefined. We sought to analyse a potential correlation between myocardial ischemia and heart failure severity in NCM patients.Methods and resultsWe enrolled 41 NCM patients (28 male and 13 female), aged 21–70 years. In all patients, we have determined left ventricular end‐diastolic volume (LVEDV), left ventricular ejection fraction (LVEF), and global longitudinal strain (GLS) by echocardiography. At the same time, serum levels of N‐terminal pro‐B‐type natriuretic peptide (NT‐proBNP) have been measured, and myocardial single‐photon emission computed tomography at rest and on stress was used to define significant myocardial ischemia defined as summed difference score ≥ 2. Myocardial ischemia has been demonstrated in 11 patients (27%, Group A), and 30 patients showed no significant ischemic changes (73%, Group B). The groups did not differ in sex, age, kidney, or liver function. When compared with Group B, Group A had significantly lower LVEF (35 ± 15% in Group A vs. 53 ± 11% in Group B, P < 0.001), higher LVEDV (188 ± 52 mL vs. 136 ± 52 mL, P = 0.007), lower GLS (−9.9 ± 5.2% vs. −14.5 ± 4.1%, P = 0.001), and higher NT‐proBNP levels (1691 ± 1883 pg/mL vs. 422 ± 877 pg/mL, P = 0.006). Overall, higher summed difference score was associated with lower LVEF (r = −0.48, P = 0.001), higher LVEDV (r = 0.39, P = 0.012), lower GLS (r = 0.352, P = 0.024), and higher levels of NT‐proBNP (r = 0.66, P < 0.001).ConclusionsThe presence of myocardial ischemia in patients with NCM is associated with worse left ventricular function, dilation of the left ventricle, and more pronounced neurohumoral activation.
Rehospitalization burden and morbidity risk in patients with heart failure with mid‐range ejection fraction
Authors: Santas Enrique , de la Espriella Rafael , Palau Patricia , Miñana Gema , Amiguet Martina , Sanchis Juan , Lupón Josep , Bayes‐Genís Antoni , Chorro Francisco Javier , Núñez Villota Julio 
Published: March 2020

AbstractAimsHeart failure with mid‐range ejection fraction (HFmrEF) has been proposed as a distinct HF phenotype, but whether patients on this category fare worse, similarly, or better than those with HF with reduced EF (HFrEF) or preserved EF (HFpEF) in terms of rehospitalization risks over time remains unclear.Methods and resultsWe prospectively included 2961 consecutive patients admitted for acute HF (AHF) in our institution. Of them, 158 patients died during the index admission, leaving the sample size to be 2803 patients. Patients were categorized according to their EF: HFrEF if EF ≤ 40% (n = 908, 32.4%); HFmrEF if EF = 41–49% (n = 449, 16.0%); and HFpEF if EF ≥ 50% (n = 1446, 51.6%). Covariate‐adjusted incidence rate ratios (IRRs) were used to evaluate the association between EF status and recurrent all‐cause and HF‐related admissions. At a median follow‐up of 2.6 years (inter‐quartile range: 1.0–5.3), 1663 (59.3%) patients died, and 6035 all‐cause readmissions were registered in 2026 patients (72.3%), 2163 of them HF related. Rates of all‐cause readmission per 100 patients‐years of follow‐up were 150.1, 176.9, and 163.6 in HFrEF, HFmrEF, and HFpEF, respectively (P = 0.097). After multivariable adjustment, when compared with that of patients with HFrEF and HFpEF, HFmrEF status was not significantly associated with a different risk of all‐cause readmissions (IRR = 0.99; 95% confidence interval [CI], 0.77–1.27; P = 0.926; and IRR = 0.93; 95% CI, 0.74–1.18; P = 0.621, respectively) or HF‐related readmissions (IRR = 1.06; 95% CI, 0.77–1.46; P = 0.725; and IRR = 1.11; 95% CI, 0.82–1.50; P = 0.511, respectively).ConclusionsFollowing an admission for AHF, patients with HFmrEF had a similar rehospitalization burden and a similar risk of recurrent all‐cause and HF‐related admissions than had patients with HFrEF or HFpEF. Regarding morbidity risk, HFmrEF seems not to be a distinct HF phenotype.
The dual path of the rejection (dis)identification model: A study on adolescents with a migrant background
Authors: Mazzoni Davide , Pancani Luca , Marinucci Marco , Riva Paolo 
Published: March 2020

AbstractEthnic‐based rejection, especially when prolonged over time, can result in withdrawal (e.g., resignation) and antisocial (e.g., delinquent) behaviors. Rejection (dis)identification literature suggests that identification with the minority (ethnic) group and disidentification with the majority (national) group mediate the relationship between rejection and different dimensions of well‐being. Through secondary analyses of survey data from an international sample of adolescents with a migrant background (N = 1,163) we tested the predictions that, following chronic experiences of rejection, disidentification from the national (rejecting) group will increase withdrawal and feelings of resignation whereas identification with the ethic (rejected) group will have a protective role toward delinquent behaviors. Results of the path analysis were consistent with these hypotheses without significant differences between immigrant generations. The study sheds light on the multifaceted nature of identification processes following social rejection and contributes to the integration of the rejection‐identification model with classical theorizations of social exclusion.
Study of statistical methods for texture analysis and their modern evolutions
Authors: Ramola Ayushman , Shakya Amit Kumar , Van Pham Dai 
Published: March 2020

AbstractTexture analysis is widely performed in the current time as it is considered as an intimate property of the surface. It is widely used in the field of image processing, remote sensing applications, biomedical analysis, document processing, and so on. In this investigation, we present a detailed study of four different methodologies that have been developed for texture classification. These methodologies include gray level cooccurrence matrix (GLCM), local binary pattern (LBP), autocorrelation function (ACF), and histogram pattern. The detailed investigation on these methods suggests that GLCM is best for analyzing the surface texture, land‐use/landcover classification, and satellite data processing. LBP is widely used to analyze the facial features of an individual. The autocorrelation is used to identify the regularity of the textured surface. Finally, through histograms, one can visually identify the changes developed while analyzing the texture of the image data. Furthermore, we present a brief summary for newly developed texture classification techniques such as binary Gabor pattern, local spiking pattern, SRITCSD method, scale inversion, and deep perception models for texture analysis. Some benchmark texture datasets used in image processing are also discussed in this
work.
The influence of charging process on trigenerative performance of compressed air energy storage system
Authors: He Yang , Zhou Shenghui , Xu Yujie , Chen Haisheng , Deng Jianqiang 
Published: March 2020

SummaryAdiabatic compressed air energy storage system (ACAES) has a natural advantage on trigeneration combined cooling, heating and power. A dynamic model coupled with exergy calculation is developed and the charging strategy for trigenerative application is focused on. The dynamic characteristic of ACAES is performed and the effects of charging mode, number of compression stages and thermal energy storage on the characteristic of trigenerative application are obtained. The sliding‐pressure charging mode is suggested for the trigeneration due to 3.92% higher exergy efficiency than that of constant‐pressure charging mode. Asymmetrical arrangement of ACAES with more compression stages is efficient for its trigenerative application especially increasing heating and cooling supplies with 2.9% exergy efficiency improvement. Furthermore, changing mass flow rate of thermal energy storage medium (ie, water) shows an outstanding ability to vary the cooling, heating, and power supply ratios in a very wide range. Besides, the economic analysis is carried out which addresses the obvious economic improvement by trigenerative application of ACAES. Accordingly, joint regulation of compression stages and water mass flow rate is suggested to be an efficient and economic approach to adjust the distribution of cooling, heating and electricity supplies according to the user's demand.
Emotional and non‐emotional facets of impulsivity in eating disorders: From anorexia nervosa to bulimic spectrum disorders
Authors: Mallorquí‐Bagué Núria , Testa Giulia , Lozano‐Madrid María , Vintró‐Alcaraz Cristina , Sánchez Isabel , Riesco Nadine , Granero Roser , Perales Jose C. , Navas Juan F. , Megías‐Robles Alberto , Martínez‐Zalacaín Ignacio , Veciana de las Heras Misericordia , Jiménez‐Murcia Susana , Fernández‐Aranda Fernando 
Published: March 2020

AbstractObjectiveImpulsivity and difficulties in regulating emotions are considered to be transdiagnostic characteristics of patients with eating disorders (EDs). The study aimed to investigate trait impulsivity and inhibitory components of impulsivity, related or unrelated to emotions in patients with EDs.MethodA total of 17 patients with anorexia nervosa (AN), 16 patients with bulimic‐spectrum EDs (BSD) and 20 healthy control (HC) participants completed an impulsivity scale (UPPS‐P) before performing an emotional inhibitory control task during electroencephalography (EEG) acquisition.ResultsHigher trait impulsivity in EDs than HC (with higher scores among BSD patients) was observed. However, no differences in behavioural measures or neural indexes [event‐related potential (ERP)] of emotional and non‐emotional inhibitory control were observed between patients and HC.ConclusionThe present results highlighted negative urgency, an impulsive personality trait related to emotions, as a common feature of AN and BSD. Lack of perseverance, a trait which is less related to emotions, specifically characterises patients with BSD. On the other hand, behavioural and ERP data did not show altered inhibitory control in EDs, for either general or emotional‐related response inhibition.
Enzymatic hydrolysis pretreatment for enhancing the protein solubility and physicochemical quality of Cordyceps militaris chicken soup
Authors: Dong Hao , Liu Jialing , Zeng Xiaofang , Bai Weidong , Yu Limei 
Published: March 2020

AbstractChicken soup is one of the most popular Chinese‐style soups due to its high nutritional value and special flavor. However, the nutrients, mainly soluble protein, in the soup are relatively low. The aim of the present work was to enhance the protein solubility and other physicochemical properties of Cordyceps militaris chicken soup by enzymatic hydrolysis pretreatment. Results indicated that the soluble protein dissolution rate and flavor nucleotides (I+G) of Cordyceps militaris chicken soup had 1.6‐fold and 0.5‐fold increase, respectively, after enzymatic hydrolysis pretreatment. Not only the contents of total amino acids (TAA) and essential amino acids (EAA) in Cordyceps militaris chicken soup significantly increased, the organoleptic quality was also markedly improved after the enzymatic hydrolysis pretreatment. The present work provides a potential approach, which is enzymatic hydrolysis pretreatment of chicken meat, to enhance the protein solubility and physicochemical quality of Cordyceps militaris chicken soup.