bluuebunny/crossref_metadata_2025_split huggingface dataset:
Evaluation of the truebeam machine performance check (MPC) geometric checks for daily IGRT geometric accuracy quality assurance
Authors: Barnes Michael P , Greer Peter B 
Published: March 2017

AbstractMachine Performance Check (MPC) is an automated and integrated image‐based tool for verification of beam and geometric performance of the TrueBeam linac. The aims of the study were to evaluate the performance of the MPC geometric tests relevant to OBI/CBCT IGRT geometric accuracy. This included evaluation of the MPC isocenter and couch tests. Evaluation was performed by comparing MPC to QA tests performed routinely in the department over a 4‐month period. The MPC isocenter tests were compared against an in‐house developed Winston–Lutz test and the couch compared against routine mechanical QA type procedures. In all cases the results from the routine QA procedure was presented in a form directly comparable to MPC to allow a like‐to‐like comparison. The sensitivity of MPC was also tested by deliberately miscalibrating the appropriate linac parameter. The MPC isocenter size and MPC kV imager offset were found to agree with Winston–Lutz to within 0.2 mm and 0.22 mm, respectively. The MPC couch tests agreed with routine QA to within 0.12 mm and 0.15°. The MPC isocenter size and kV imager offset parameters were found to be affected by a change in beam focal spot position with the kV imager offset more sensitive. The MPC couch tests were all unaffected by an offset in the couch calibration but the three axes that utilized two point calibrations were sensitive to a miscalibration of the size in the span of the calibration. All MPC tests were unaffected by a deliberate misalignment of the MPC phantom and roll of the order of one degree.
Hydrophilic films: How hydrophilicity affects blood compatibility and cellular compatibility
Authors: Kuo Zong‐Keng , Fang Mei‐Yen , Wu Tu‐Yi , Yang Ted , Tseng Hsiang‐Wen , Chen Chih‐Chen , Cheng Chao‐Min 
Published: March 2017

AbstractHydrophilic materials have been used in many fields, but have recently garnered growing attention in biomedicine. To promote the development and use of suitable hydrophilic materials for biomedical applications, we used three hydrophilic films of varying hydrophilicity and examined the effects of their hydrophilicity on blood compatibility, protein adsorption, blood clotting time, hemolytic activity, biocompatibility, and cell attachment. Across the spectrum of hydrophilicity examined, no obvious differences in biocompatibility were observed. While high material hydrophilicity was associated with higher hemolytic activity, it still fit the nonhemolytic criteria. Further, higher hydrophilicity decreased protein adsorption and cell attachment, but increased thromboresistance in our blood clotting time assay (~30% higher blood clotting index at 10 min). These results indicate that hydrophilicity increases blood compatibility with regard to thromboresistance, but reduces cellular compatibility (i.e., cell attachment), characteristics that could be exploited for a wide range of potential applications in various fields, such as glucose electrode test strips.
Mechanical, interfacial, and fracture characteristics of poly (lactic acid) and Moringa oleifera fiber composites
Authors: Islam Muhammad R. , Isa Nadia , Yahaya Ahmad N. , Beg Mohammad Dalour Hossen , Yunus Rosli M. 
Published: March 2017

AbstractThree different processing techniques, extrusion, injection, and compression, were followed to fabricate poly (lactic acid) (PLA) and Moringa oleifera fiber (MOF) based composites. Chopped fibers of length 3–5 mm were used for the extrusion followed by injection molding, whereas long‐length fibers (~100 mm) were used for compression molding process. For compression molding, long‐length fibers were spread in single and double layers. The interfacial shear strength of the composites was evaluated by fiber pull‐out testing. Composites were characterized for fracture behavior and mechanical properties. Additionally, surface morphology was also observed by scanning electron microscopy, whereas crystalline properties were evaluated by X‐ray diffraction analysis. Analyses revealed that compression molding with double layers of long‐length fibers reinforcement showed better properties than other samples. Tensile strengths of extruded and compression processed samples (double‐layered) were 75.5 and 81.1 MPa, which are approximately 33% and 44% higher respectively than neat PLA (56.5 MPa). The crack generation of PLA during applied load was observed and found eliminated for the double‐layered sample processed via compression molding. It was found that compression molding with double layer can be considered as easy and less time‐consuming method for composite preparation, with nearly 8 wt.% of less fiber consumption compared with extrusion/injection molding.
Regioselective Synthesis of Thiocyanate‐Containing Isoxazolines via FeIII/K2S2O8‐Mediated Radical Thiocyanation/Cyclization Cascade Reaction of β,γ‐Unsaturated Oximes
Authors: Ji Fei , Fan Yun , Yang Run , Yang Yueyan , Yu Dianwen , Wang Minyu , Li Zhiyu 
Published: March 2017

AbstractA simple approach for the synthesis of thiocyanate‐containing isoxazolines by FeIII/K2S2O8 mediated radical thiocyanation/cyclization cascade reaction of accessible β,γ‐unsaturated oximes has been developed. The high selectivity, mild reaction conditions and absence of harmful heavy‐metal reagents render this reaction attractive. Additionally, the thiocyanate group from isoxazolines could be easily converted to various important functional groups, which could make these compounds important building blocks in organic synthesis.
Surface plasmon polariton amplification in semiconductor–graphene–dielectric structure
Authors: Dadoenkova Yuliya S. , Moiseev Sergey G. , Abramov Aleksei S. , Kadochkin Aleksei S. , Fotiadi Andrei A. , Zolotovskii Igor O. 
Published: March 2017

A mechanism of amplification of surface plasmon polaritons due to the transfer of electromagnetic energy from a drift current wave into a far‐infrared surface wave propagating along a semiconductor‐dielectric boundary in waveguide geometry is proposed. A necessary condition of the interaction of these waves is phase matching condition, i. e., when the phase velocity of the surface wave approaches the drift velocity of charge carriers. It is shown that in the spectral region of the surface plasmon polariton slowing‐down its amplification coefficient can reach values substantially exceeding the ohmic loss coefficient of the surface wave in the structure.
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Zirconacyclopentadiene‐Annulated Polycyclic Aromatic Hydrocarbons
Authors: Kiel Gavin R. , Ziegler Micah S. , Tilley T. Don 
Published: March 2017

AbstractSyntheses of large polycyclic aromatic hydrocarbons (PAHs) and graphene nanostructures demand methods that are capable of selectively and efficiently fusing large numbers of aromatic rings, yet such methods remain scarce. Herein, we report a new approach that is based on the quantitative intramolecular reductive cyclization of an oligo(diyne) with a low‐valent zirconocene reagent, which gives a PAH with one or more annulated zirconacyclopentadienes (ZrPAHs). The efficiency of this process is demonstrated by a high‐yielding fivefold intramolecular coupling to form a helical ZrPAH with 16 fused rings (from a precursor with no fused rings). Several other PAH topologies are also reported. Protodemetalation of the ZrPAHs allowed full characterization (including by X‐ray crystallography) of PAHs containing one or more appended dienes with the ortho‐quinodimethane (o‐QDM) structure, which are usually too reactive for isolation and are potentially valuable for the fusion of additional rings by Diels–Alder reactions.
Signal‐Induced Release of Guests from a Photolatent Metal–Phenolic Supramolecular Cage and Its Hybrid Assemblies
Authors: Park Chiyoung , Yang Beom Joo , Jeong Ki Beom , Kim Chae Bin , Lee Seunghyun , Ku Bon‐Cheol 
Published: March 2017

AbstractThe coordination chemistry of plant polyphenols and metal ions can be used for coating various substrates and for creating modular superstructures. We herein explored this chemistry for the controlled release of guests from mesoporous silica nanoparticles (MSNs). The selective adsorption of tannic acids (TAs) on MSN silica walls opens the MSN mesoporous channels without disturbing mass transport. The channel may be closed by the coordination of TA with CuII ions. Upon exposure to light, photolysis of Trojan horse guests (photoacid generators, PAGs) leads to acid generation, which enables the release of payloads by decomposing the outer coordination shell consisting of TA and CuII. We also fabricated a modular assembly of MSNs on glass substrates. The photoresponsive release characteristics of the resulting film are similar to those of the individual MSNs. This method is a fast and facile strategy for producing photoresponsive nanocontainers by non‐covalent engineering of MSN surfaces that should be suitable for various applications in materials science.
Iridium‐Catalyzed Asymmetric Hydrogenation of Benzo[b]thiophene 1,1‐Dioxides
Authors: Tosatti Paolo , Pfaltz Andreas 
Published: March 2017

AbstractAn efficient iridium‐catalyzed asymmetric hydrogenation of substituted benzothiophene 1,1‐dioxides is described. The use of iridium complexes with chiral pyridyl phosphinite ligands provides access to highly enantiomerically enriched sulfones with substituents at the 2‐ and 3‐position. Sulfones of this type are of interest as core structures of agrochemicals and pharmaceuticals. Moreover, they can be further reduced to chiral 2,3‐dihydrobenzothiophenes.
Palladium‐Catalyzed Enantioselective Synthesis of 2‐Aryl Cyclohex‐2‐enone Atropisomers: Platform Molecules for the Divergent Synthesis of Axially Chiral Biaryl Compounds
Authors: Pan Chongqing , Zhu Zixi , Zhang Mingkai , Gu Zhenhua 
Published: March 2017

AbstractThe palladium‐catalyzed asymmetric synthesis of enone‐based atropisomers from 2‐iodo‐3‐methylcyclohex‐2‐enones and aryl boronic acid is reported. BoPhoz‐type phosphine–aminophosphine ligands showed superior enantioselectivity over other ligands. These cyclohexenone‐based atropisomers are useful compounds for further elaboration. The divergent synthesis of biaryl atropisomers with different ortho substituents was demonstrated.
Engineering High‐Energy Interfacial Structures for High‐Performance Oxygen‐Involving Electrocatalysis
Authors: Guo Chunxian , Zheng Yao , Ran Jingrun , Xie Fangxi , Jaroniec Mietek , Qiao Shi‐Zhang 
Published: March 2017

AbstractEngineering high‐energy interfacial structures for high‐performance electrocatalysis is achieved by chemical coupling of active CoO nanoclusters and high‐index facet Mn3O4 nano‐octahedrons (hi‐Mn3O4). A thorough characterization, including synchrotron‐based near edge X‐ray absorption fine structure, reveals that strong interactions between both components promote the formation of high‐energy interfacial Mn‐O‐Co species and high oxidation state CoO, from which electrons are drawn by MnIII‐O present in hi‐Mn3O4. The CoO/hi‐Mn3O4 demonstrates an excellent catalytic performance over the conventional metal oxide‐based electrocatalysts, which is reflected by 1.2 times higher oxygen evolution reaction (OER) activity than that of Ru/C and a comparable oxygen reduction reaction (ORR) activity to that of Pt/C as well as a better stability than that of Ru/C (95 % vs. 81 % retained OER activity) and Pt/C (92 % vs. 78 % retained ORR activity after 10 h running) in alkaline electrolyte.
A Sodium‐Ion‐Conducting Direct Formate Fuel Cell: Generating Electricity and Producing Base
Authors: Li Yinshi , Feng Ying , Sun Xianda , He Yaling 
Published: March 2017

AbstractA barrier that limits the development of the conventional cation‐exchange membrane direct liquid fuel cells (CEM‐DLFCs) is that the CEM‐DLFCs need additional base to offer both alkaline environment and charge carriers. Herein, we propose a Na+‐conducting direct formate fuel cell (Na‐DFFC) that is operated in the absence of added base. A proof‐of‐concept Na‐DFFC yields a peak power density of 33 mW cm−2 at 60 °C, mainly because the hydrolysis of sodium formate provides enough OH− and Na+ ions, proving the conceptual feasibility. Moreover, contrary to the conventional chlor‐alkali process, this Na‐DFFC enables to generate electricity and produce NaOH simultaneously without polluting the environment. The Na‐DFFC runs stably during 13 hours of continuous operation at a constant current of 10 mA, along with a theoretical production of 195 mg NaOH. This work presents a new type of electrochemical conversion device that possesses a wide range of potential applications.
Novel phase change materials based on fatty acid eutectics and triallyl isocyanurate composites for thermal energy storage
Authors: Huang Xuelin , Guo Jing , He Jing , Gong Yumei , Wang Di , Song Zhaoyang 
Published: March 2017

ABSTRACTIn this study, a series of dimension‐stabilized fatty acid eutectics and triallyl isocyanurate (TAIC) composite phase change materials were prepared via in situ reaction by blending the fatty acids and TAIC, in which the fatty acids were introduced as a phase change material (PCM), and TAIC performed as a supporting material by self‐crosslinking. Fourier transform infrared spectroscopy, X‐ray diffraction, differential scanning calorimetry, scanning electron microscopy (SEM), and thermogravimetric analysis were applied to investigate the chemical structure, crystalline properties, phase transition behavior, microstructure, and thermal stability of the composites. The results indicated that the composite possessed excellent thermal reliability and heat storage durability even after 300 heating–cooling cycles. Moreover, the composites had applicable phase transition temperatures in the range of 26–40 °C and satisfying latent heat storage capacities of higher than 110 J/g. The SEM images showed that the particle size of the nanoparticles of the composites was about 200 nm after treatment. The dimensional measurement of the composites proved a high service temperature of 100 °C, indicating that the composites were promising for thermal energy storage materials. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44866.
Aging of anhydride‐hardened epoxies in lubricants at elevated temperatures
Authors: Reuscher Vivien , Haag Sabine , Patzelt Gesa , Mayer Bernd 
Published: March 2017

ABSTRACTIn automotive under‐the‐hood applications, electronics respectively their packaging materials come in contact with automotive fluids. The effect of automatic transmission fluid (ATF) on an anhydride‐cured epoxy was investigated at temperatures up to 180 °C for up to 1000 h. This study has shown that ATF retards the oxidative aging of the epoxy, presumably due to oxygen consumption. Whereas in air the material underwent a thermo‐oxidative aging with a mass loss of up to 4% and a strong broadening of Tg to higher temperatures, in ATF a temperature dependent distinctive drop of Tg from 142 to 126 °C after 1000 h aging at 180 °C, and a mass loss of maximum 1% was observed which might be a thermal decomposition of the epoxy material. A slight broadening of the damping factors might indicate an intrusion of ATF components. A color change of the samples could be observed after aging in air and ATF, with the discoloration in air being more intense. An explanation for the color change might be either a minor amount of oxygen causing an oxidative discoloration reaction or the intrusion of colored ATF degradation products. While the oxidation‐kinetics in air exhibited Arrhenius temperature‐dependence the mechanism in ATF changed above 165 °C. An acceleration of aging tests at temperatures beyond 150 °C is, therefore, not possible. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44877.
Industrial polyethylene melt index prediction using ensemble manifold learning–based local model
Authors: Liu Yi , Liang Yu , Gao Zengliang 
Published: March 2017

ABSTRACTFor online melt index prediction in multiple‐grade polyethylene polymerization processes, using only a fixed model is insufficient. Additionally, without enough process knowledge, it is difficult to select suitable input variables to accurately construct prediction models. A novel manifold learning based local probabilistic modeling method named ensemble just‐in‐time Gaussian process regression (EJGPR) is developed. By utilizing output variables, an optimization framework is proposed to preserve the local structure of both input and output variables. Then the output information is integrated into construction of a JGPR‐based local model. Additionally, some new extracted variables in the projection space can be obtained. Moreover, using the probabilistic prediction information, the uncertainty of each JGPR‐based local candidate model can be simply described. Consequently, using an efficient ensemble strategy, a more accurate EJGPR prediction model can be constructed online. The melt index prediction results in an industrial polyethylene process show it has better performance than conventional methods. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45094.
Regulated in Development and DNA Damage Response 1 Deficiency Impairs Autophagy and Mitochondrial Biogenesis in Articular Cartilage and Increases the Severity of Experimental Osteoarthritis
Authors: Alvarez‐Garcia Oscar , Matsuzaki Tokio , Olmer Merissa , Plate Lars , Kelly Jeffery W. , Lotz Martin K. 
Published: March 2017

ObjectiveRegulated in development and DNA damage response 1 (REDD1) is an endogenous inhibitor of mechanistic target of rapamycin (mTOR) that regulates cellular stress responses. REDD1 expression is decreased in aged and osteoarthritic (OA) cartilage, and it regulates mTOR signaling and autophagy in articular chondrocytes in vitro. This study was undertaken to investigate the effects of REDD1 deletion in vivo using a mouse model of experimental OA.MethodsOA severity was histologically assessed in 4‐month‐old wild‐type and REDD1−/− mice subjected to surgical destabilization of the medial meniscus (DMM). Chondrocyte autophagy, apoptosis, mitochondrial content, and expression of mitochondrial biogenesis markers were determined in cartilage and cultured chondrocytes from wild‐type and REDD1−/− mice.ResultsREDD1 deficiency increased the severity of changes in cartilage, menisci, subchondral bone, and synovium in the DMM model of OA. Chondrocyte death was increased in the cartilage of REDD1−/− mice and in cultured REDD1−/− mouse chondrocytes under oxidative stress conditions. Expression of key autophagy markers (microtubule‐associated protein 1A/1B light chain 3 and autophagy protein 5) was markedly reduced in cartilage from REDD1−/− mice and in cultured human and mouse chondrocytes with REDD1 depletion. Mitochondrial content, ATP levels, and expression of the mitochondrial biogenesis markers peroxisome proliferator–activated receptor γ coactivator 1α (PGC‐1α) and transcription factor A, mitochondrial (TFAM) were also decreased in REDD1‐deficient chondrocytes. REDD1 was required for AMP‐activated protein kinase–induced PGC‐1α in chondrocytes.ConclusionOur findings suggest that REDD1 is a key mediator of cartilage homeostasis through regulation of autophagy and mitochondrial biogenesis and that REDD1 deficiency exacerbates the severity of injury‐induced OA.
Simple and Versatile Preparation of Luminescent Amphiphilic Platinum(II)‐containing Polystyrene Complexes With Transformable Nanostructures Assisted by Pt⋅⋅⋅Pt and π–π Interactions
Authors: Cheng Heung‐Kiu , Chung Clive Yik‐Sham , Zhang Kaka , Yam Vivian Wing‐Wah 
Published: March 2017

AbstractPlatinum(II)‐containing polystyrene (PS) complexes have been synthesized by dehydrohalogenation of α‐alkyne‐PS and chloroplatinum(II) precursors with different functionalities on the terpyridine ligands. Through modulation of the hydrophilicity/hydrophobicity of the terpyridine ligands and hence the overall amphiphilicity of the complexes, the complexes can undergo self‐assembly into various superstructures with remarkable luminescence properties in different solution mixtures, as revealed by electron microscopy, UV/Vis absorption and emission spectroscopy. Pt⋅⋅⋅Pt and/or π–π interactions among the platinum(II) terpyridine moieties are found to play substantial roles in the stabilization of the superstructures and the turn‐on/off of the triplet metal–metal‐to‐ligand charge transfer (3MMLCT) emission of the complexes.
Self‐Healable Supramolecular Hydrogel Formed by Nor‐Seco‐Cucurbit[10]uril as a Supramolecular Crosslinker
Authors: Park Kyeng Min , Roh Joon Ho , Sung Gihyun , Murray James , Kim Kimoon 
Published: March 2017

AbstractA supramolecular hydrogel was formed by a simple mixing of solutions of nor‐seco‐cucurbit[10]uril (NS‐CB[10]) and adamantylamine‐terminated 4‐armed polyethylene glycol (AdA‐4‐arm‐PEG). In the formation of the hydrogel, NS‐CB[10] acted as a noncovalent crosslinker to form a ternary complex with two AdA moieties. The dynamic and selective nature of the host–guest interaction between NS‐CB[10] and AdA enabled the supramolecular hydrogel to rapidly recover its physical properties after it was damaged. In addition, the recovered hydrogel retained its physical properties with negligible differences from those of the pristine material, even after multiple self‐healing cycles. The NS‐CB[10]‐based hydrogel with the self‐healing property may be useful for various biological applications such as drug delivery, cell therapy and tissue engineering.
BIM‐Anwendungen im Tunnelbau
Authors: König Markus , Rahm Tobias , Nagel Felix , Speier Ludger 
Published: March 2017

AbstractDie Anwendung von Building Information Modeling (BIM) im Infrastrukturbau soll bis zum Jahr 2020 in Deutschland eingeführt und anschließend etabliert werden. Dies schließt auch die Planung, die Herstellung und den Betrieb von Tunnelbauwerken ein. Im Rahmen von Forschungs‐ und Praxisprojekten wurden in den letzten Jahren bereits Erfahrungen zur Verwendung der BIM‐Methodik gesammelt. Es hat sich gezeigt, dass die ganzheitliche Einführung von BIM eine genaue Analyse der einzelnen Prozesse und eine projektspezifische Definition von sinnvollen Anwendungsfällen erfordert. Im Rahmen des Beitrags werden aktuelle Erfahrungen und einzelne BIM‐Anwendungsfälle im Tunnelbau erläutert. Es wird exemplarisch gezeigt, wie die geometrische und semantische Informationstiefe anwendungsfallorientiert festgelegt werden kann. Anschließend wird auf die Umsetzung einer gemeinsamen Datenumgebung sowie die Verknüpfung und den Austausch von Fachmodellen eingegangen. Hierbei haben sich insbesondere Ansätze auf Basis von Linked Data bzw. Multimodell‐Containern als besonders geeignet herausgestellt. Anhand von praxisnahen Beispielen werden verschiedene Anwendungsfälle und damit verbundene Ziele für den Einsatz von BIM präsentiert.
The impact of emotions on recall: An empirical study on social ads
Authors: Missaglia Anna Laura , Oppo Annalisa , Mauri Maurizio , Ghiringhelli Barbara , Ciceri Andrea , Russo Vincenzo 
Published: March 2017

AbstractEmotions are a complex phenomenon that entails a tricky problem regarding the measurement. To partially overcome this question, we assess emotions both using self‐report and measures commonly used in neuromarketing. This study assesses the accuracy of the recall after 4 months regarding two social advertising videos about female genital mutilation. Forty female participants were recruited. The skin conductance trend of the participants is different when viewing the two videos. The majority of participants (94.9%) reported that the two videos elicited different emotions (sadness for the first video and anger for the second one). Furthermore, according to arousal and valence model, these data are consistent with the literature that underlines the importance of psychophysiological indexes in measuring emotions and their associations with memory performances.