bluuebunny/crossref_metadata_2025_split huggingface dataset:
A semianalytic time‐resolved poro‐elasto‐plastic model for wellbore stability and stimulation
Authors: Fokker Peter A. , Singh Aditya , Wassing Brecht B.T. 
Published: January 2020

SummaryWellbore stability problems and stimulation operations call for models helping in understanding the subsurface behaviour and optimizing engineering performance. We present a fast, iteratively coupled model for the flow and mechanical behaviour that employs a time‐sequential approach. Updates of pore pressure are calculated in a timestepping approach and propagated analytically to updates of the mechanical response. This way, the spatial and temporal evolution of pressure and mechanical response around a wellbore can be evaluated. The sequential approach facilitates the incorporation of pressure diffusion and of time‐dependent plasticity. Also, it facilitates the implementation of permeability evolving with time, due to plasticity or stimulation. The model has been validated by means of a coupled numerical simulator. Its capabilities are demonstrated with a selection of sensitivity runs for typical parameters. Ongoing investigations target geothermal energy operations through the incorporation of thermo‐elastic stresses and more advanced plasticity models.
Comparative study of electrically conductive polymer composites of polyester‐based thermoplastic polyurethane matrix with polypyrrole and montmorillonite/polypyrrole additive
Authors: dos Santos Andrey M. , Merlini Claudia , Ramôa Sílvia D. A. S , Barra Guilherme M. O. 
Published: January 2020

AbstractElectrically conductive polymer composites were produced by melt mixing technique using polyester‐based thermoplastic polyurethane (TPU) as matrix and polypyrrole (PPy) or montmorillonite/polypyrrole (MMT/PPy) fillers doped with dodecylbenzenesulfonic acid. Composites with different mass concentrations of conductive additives were obtained and characterized, comparing the electrical properties, structure, and morphology of the composites in order to evaluate the effect of conductive filler content and type. The results showed that TPU/MMT/PPy composites have lower percolation threshold and higher electrical conductivity than TPU/PPy. This behavior was attributed to the higher aspect ratio, better dispersion, and greater interaction between nanostructured MMT/PPy and TPU host insulating when compared with neat PPy. In addition, TPU/MMT/PPy composites produced using polyester‐based TPU tend to have better electrical properties than polyether‐based TPU composites due to its higher polarity, increasing the electrical conductivity and reducing the percolation threshold.
Improvement in mechanical properties of NBR/AO60/MMT composites by surface hydrogen bond
Authors: Liang Ping , Yang Shuyan , Ouyang Xing , Hong Haoqun , Jiao Yuanqi 
Published: January 2020

AbstractIt is still a challenge to prepare high performance rubber/MMT composites by one‐pot method without solution. In this work, NBR/AO60/montmorillonite (MMT) (NBR/AM) composites were prepared by mechanical blending method and in‐situ formation of surface hydrogen bond was introduced under vulcanization process. Results showed that the polar parts of melting AO60 could partly intercalate into interlayer of MMT and some parts of melting AO60 molecules were absorbed onto surfaces of MMT particles during the vulcanization process. Subsequently, surface hydrogen bonds were constructed among NBR, AO60, and MMT after natural cooling, as evidenced by FTIR, resulting in more complex morphology and good interfacial adhesion in the NBR/AM composite. Consequently, as compared to NBR/montmorillonite (NBR/M) composite, remarkable improvements were found in mechanical properties and energy dissipation at high temperature of NBR/AM composite, which may provide a new prospect for designing high performance damping materials.
Etiology and management of early pregnancy renal anhydramnios: Is there a place for serial amnioinfusions?
Authors: Jelin Angie C. , Sagaser Katelynn G. , Forster Katherine R. , Ibekwe Tochi , Norton Mary E. , Jelin Eric B. 
Published: January 2020

AbstractEarly pregnancy renal anhydramios (EPRA) comprises congenital renal disease that results in fetal anhydramnios by 22 weeks of gestation. It occurs in over 1 in 2000 pregnancies and affects 1500 families in the US annually. EPRA was historically considered universally fatal due to associated pulmonary hypoplasia and neonatal respiratory failure. There are several etiologies of fetal renal failure that result in EPRA including bilateral renal agenesis, cystic kidney disease, and lower urinary tract obstruction. Appropriate sonographic evaluation is required to arrive at the appropriate urogenital diagnosis and to identify additional anomalies that allude to a specific genetic diagnosis. Genetic evaluation variably includes karyotype, microarray, targeted gene testing, panels, or whole exome sequencing depending on presentation. Patients receiving a fetal diagnosis of EPRA should be offered management options of pregnancy termination or perinatal palliative care, with the option of serial amnioinfusion therapy offered on a research basis. Preliminary data from case reports demonstrate an association between serial amnioinfusion therapy and short‐term postnatal survival of EPRA, with excellent respiratory function in the neonatal period. A multicenter trial, the renal anhydramnios fetal therapy (RAFT) trial, is underway. We sought to review the initial diagnosis ultrasound findings, genetic etiologies, and current management options for EPRA.
Ferroelectric polymers for non‐volatile memory devices: a review
Authors: Li Huilin , Wang Ruopeng , Han Su‐Ting , Zhou Ye 
Published: January 2020

AbstractFerroelectric memories have attracted great attention for data storage, and ferroelectric polymers have been widely studied with the development of flexible and wearable devices. The multifunctional capabilities, non‐volatile memory state, low power consumption, long durability, fast switching, chemical stability and mechanical flexibility make them good candidates for various memories, such as ferroelectric tunnel junctions and diodes, ferroelectric capacitors, resistive memories and field‐effect transistors. Here, recent advances in the research of these ferroelectric polymer memories are summarized, and challenges in the development of smart electronics are also discussed. © 2020 Society of Chemical Industry
Does attending a deeper learning school promote student motivation, engagement, perseverance, and achievement?
Authors: Agger Charlotte A. , Koenka Alison C. 
Published: January 2020

AbstractThe evolving economic landscape of the 21st century demands graduates who possess deeper learning (DL) competencies such as critical thinking and collaboration skills. Despite their importance, little work has examined the motivational mechanisms through which DL predicts essential academic outcomes. The current study (N = 1,288) used an ethnically diverse sample of students (53% Hispanic) to explore self‐efficacy and mastery goal orientation as potential mediators of the relationship between (a) enrollment in a DL school and (b) academic engagement, perseverance, and mathematics achievement. Results showed that students who attended DL schools, compared with students in non‐DL schools, reported higher self‐efficacy, mastery goal orientation, and academic engagement. Path analyses revealed that attending a DL school was associated with higher academic engagement and self‐efficacy. However, enrollment in a DL school was not directly related to mathematics achievement. Overall, results provide evidence that attending a DL school can lead to valuable motivation‐ and engagement‐related benefits.
Preparation of Highly Stable and Photoluminescent Cadmium‐Free InP/GaP/ZnS Core/Shell Quantum Dots and Application to Quantitative Immunoassay
Authors: Xu Yanxia , Lv Yanbing , Wu Ruili , Shen Huaibin , Yang Huawei , Zhang Han , Li Jinjie , Li Lin Song 
Published: January 2020

AbstractIndium phosphide (InP) quantum dots (QDs) are ideal substitutes for widely used cadmium‐based QDs and have great application prospects in biological fields due to their environmentally benign properties and human safety. However, the synthesis of InP core/shell QDs with biocompatibility, high quantum yield (QY), uniform particle size, and high stability is still a challenging subject. Herein, high quality (QY up to 72%) thick shell InP/GaP/ZnS core/shell QDs (12.8 ± 1.4 nm) are synthesized using multiple injections of shell precursor and extension of shell growth time, with GaP serving as the intermediate layer and 1‐octanethiol acting as the new S source. The thick shell InP/GaP/ZnS core/shell QDs still keep high QY and photostability after transfer into water. InP/GaP/ZnS core/shell QDs as fluorescence labels to establish QD‐based fluorescence‐linked immunosorbent assay (QD‐FLISA) for quantitative detection of C‐reactive protein (CRP), and a calibration curve is established between fluorescence intensity and CRP concentrations (range: 1–800 ng mL−1, correlation coefficient: R2 = 0.9992). The limit of detection is 2.9 ng mL−1, which increases twofold compared to previously reported cadmium‐free QD‐based immunoassays. Thus, InP/GaP/ZnS core/shell QDs as a great promise fluorescence labeling material, provide a new route for cadmium‐free sensitive and specific immunoassays in biomedical fields.
Transcription‐inducing activity of natural and synthetic juvenile hormone agonists through the Drosophila Methoprene‐tolerant protein
Authors: Yokoi Taiyo , Nabe Taku , Ishizuka Chiharu , Hayashi Ken'ichiro , Ito‐Harashima Sayoko , Yagi Takashi , Nakagawa Yoshiaki , Miyagawa Hisashi 
Published: January 2020

AbstractBACKGROUNDJuvenile hormones (JHs) are a class of sesquiterpenoids that play a pivotal role in insect growth and reproduction. Synthetic JH agonists (JHAs), including pyriproxyfen, have been widely used as insecticides to control agricultural pests and disease vectors. The antimetamorphic action of JHAs is mediated by their intracellular receptor, the heterodimer of Methoprene‐tolerant (Met) and Taiman (Tai) proteins. Although a range of bioassay systems has been developed to detect the activity of JHAs, each of these systems has its own drawback(s), such as poor reproducibility, the use of radioactive ligands or the effect of endogenous JH‐signaling factors.RESULTSTo address these issues, we constructed a new luciferase reporter assay for JHAs in mammalian HEK293T cells transiently transfected with the Drosophila Met and Tai genes. This reporter system gave highly reproducible results and showed nanomolar sensitivity to natural JHs. We then applied this reporter system to a structure–activity relationship (SAR) analysis of 14 natural and synthetic JHAs, leading to identification of the ligand structural factors important for the transcription‐inducing activity.CONCLUSIONBecause this reporter system is not affected by the signaling cascade downstream of the JH receptors, it is suitable for evaluating the intrinsic activity of JHAs. The SAR results obtained in this study therefore provide invaluable information on the rational design of novel JHA insecticides.
Distributed fusion Kalman filtering under binary sensors
Authors: Zhang Yuchen , Chen Bo , Yu Li 
Published: January 2020

SummaryBinary sensors are special sensors that only transmit one‐bit information at each time and have been widely applied to environmental awareness and medical monitoring. This paper is concerned with the distributed fusion Kalman filtering problem for a class of binary sensor systems. A novel uncertainty approach is proposed to better extract valid information from binary sensors at switching instant. By minimizing a local estimation error covariance, the local robust Kalman estimates are firstly obtained. Then, the distributed fusion Kalman filter is designed by resorting to the covariance intersection fusion criterion. Finally, a blood oxygen content model is employed to show the effectiveness of the proposed methods.
Mitigating evaporation and desiccation cracks in soil with the sustainable material biochar
Authors: Yang Binbin , Xu Ke , Zhang Zhuo 
Published: January 2020

AbstractExamining soil cracking due to evaporation and desiccation is very important as these two factors affect the permeability of soil in agricultural systems and engineering construction projects. In order to investigate the effects of a sustainable material on the evaporation and cracking of soil, biochar produced through pyrolysis with wheat straw was experimentally examined as an air‐dried additive. Soil was mixed with different amounts of biochar to produce the samples (0, 2.5, 5, 10, and 20% by weight) which were then tested. The cracking properties were subsequently examined based on variations in water loss. The development of the cracks was quantitatively analyzed by using a digital image processing technique, which provided the optimum biochar content that would mitigate evaporation and the development of desiccation cracks. The results were then plotted, and the rate of evaporation of the water in the soil samples with different biochar contents showed an approximately “step” shaped curve, in which three stages could be observed: rapid, slow and constant rates of evaporation. The rate of evaporation quickly declined with a biochar content of 5%. The fractal dimension of the cracks was also reduced with increases in the biochar content, which meant that biochar could inhibit the degree of soil cracking. The optimum biochar content was therefore 5% by weight in this study, which may effectively prevent soil cracking and reduce evaporation, thus reducing landscape irrigation costs in urban infrastructures or irrigation costs in rural agricultural farming.
Reversible Charge Transfer with Single‐Walled Carbon Nanotubes Upon Harvesting the Low Energy Part of the Solar Spectrum
Authors: Menon Arjun , Slominskii Yuri L. , Joseph Jan , Dimitriev Oleg P. , Guldi Dirk M. 
Published: January 2020

AbstractHere, the ability of a novel near‐infrared dye to noncovalently self‐assemble onto the surface of single‐walled carbon nanotubes (SWCNTs) driven by charge‐transfer interactions is demonstrated. Steady‐state, Raman, and transient absorption spectroscopies corroborate the electron donating character of the near‐infrared dye when combined with SWCNTs, in the form of fluorescence quenching of the excited state of the dye, n‐doping of SWCNTs, and reversible charge transfer, respectively. Formation of the one‐electron oxidized dye as a result of interactions with SWCNTs is supported by spectroelectrochemical measurements. The ultrafast electronic process in the near‐infrared dye, once immobilized onto SWCNTs, starts with the formation of excited states, which decay to the ground state via the intermediate population of a fully charge‐separated state, with characteristic time constants for the charge separation of 1.5 ps and charge recombination of 25 ps, as derived from the multiwavelength global analysis. Of great relevance is the fact that charge‐transfer occurs from the hot excited state of the near‐infrared dye to SWCNTs.
Microlasers from AIE‐Active BODIPY Derivative
Authors: Liu Wangwang , Yu Huakang , Hu Rongrong , Xu Tao , Lun Yipeng , Gan Jiulin , Xu Shanhui , Yang Zhongmin , Tang Ben Zhong 
Published: January 2020

AbstractOrganic microlasers have attracted much attention due to their unique features such as high mechanical flexibility, facile doping of gain materials, high optical quality, simplicity and low‐cost fabrication. However, organic gain materials usually suffer from aggregation‐caused quenching (ACQ), preventing further advances of organic microlasers. Here, a new type of microlaser from aggregation‐induced emission (AIE) material is successfully demonstrated. By introducing a typical noncrystalline AIE material, a high quality microlaser is obtained via a surface tension‐induced self‐assembly approach. Distinct from conventional organic microlasers, the organic luminescent material used here is initially nonluminescent but can shine after aggregation under optical pumping. Further investigations demonstrate that AIE‐based microlasers exhibit advantages to enable much higher doping concentrations, which provides an alternative way to improved lasing performance including dramatically reduced threshold and favorable lasing stability. It is believed that these results could provide a promising way to extend the content of microlasers and open a new avenue to enable applications ranging from chemical sensing to biology.
A New Strategy to Reduce Toxicity of Ethidium Bromide by Alternating Anions: New Derivatives with Excellent Optical Performances, Convenient Synthesis, and Low Toxicity
Authors: Song Yuchen , Xu Lei , Wu Qiong , Xiao Saiyu , Zeng Haixiang , Gong Yanbin , Li Conggang , Cheng Sixue , Li Qianqian , Zhang Liyao , Li Zhen 
Published: January 2020

AbstractThe potential threats of ethidium bromide to laboratory staff have drawn more and more attention. Considering that commercial available substitutes still cannot replace ethidium bromide due to some drawbacks, it can be a better solution by functionalizing directly on ethidium bromide moiety. In this work, ethidium bromide is ameliorated via changing the bromide anion into moieties with more twist structures to prevent the aggregation caused quenching in aggregations, and increase more hydrophobic ability to form nanoparticles in aqueous. The nanoparticles of these probes show negative zeta potential, low toxicity, good photostability, and high sensitivity, both in solution tests and gel electrophoresis experiments. Meanwhile, the weak penetration ability through skin constitutes a dual protection for users. Furthermore, the one step synthesis from commercial available ethidium bromide and the convenient purification also do help to these probes in applications.
Der Stand der allergologischen Weiterbildung von Kinderärzten
Authors: Striegel A. K. , Price M. , Frandsen V. , Gernert S. , Arens A. , Wiesenäcker D. , Lange L. 
Published: January 2020

Zusammenfassung
Hintergrund
Ein deutlicher Rückgang abgelegter Prüfungen im Fach Allergologie und gleichzeitig eine Zunahme allergologischer Erkrankungen haben die Nachwuchsgruppe der Gesellschaft für Pädiatrische Allergologie und Umweltmedizin (GPAU) dazu bewogen, die Qualität und die Bedingungen der allergologischen Ausbildung in der Pädiatrie zu untersuchen. Zeitgleich wurde beim Deutschen Ärztetag ein neues Format der Zusatzweiterbildung Allergologie (Musterweiterbildungsordnung [MWBO]) verabschiedet.

Ziel der Arbeit
Ziel dieser Umfrage war es, die Rahmenbedingungen der allergologischen Ausbildung von Kinderärzten in Deutschland genauer zu untersuchen.

Material und Methoden
Es wurde eine Umfrage mithilfe eines Fragebogens sowohl bei den Weiterbildungsermächtigten (insgesamt 169) als auch bei deren Weiterbildungsassistent*innen durchgeführt.

Ergebnisse und Diskussion
Von insgesamt 56 Weiterbildungsermächtigten und 32 Weiterbildungsassistent*innen wurde der Fragebogen ausgewertet. Es zeigt sich in der Auswertung, dass der Prozentsatz an Frauen bei den Weiterbildungsermächtigten deutlich geringer ist im Vergleich zu den Weiterbildungsassistent*innen (20 vs. 66 %), jedoch sind mittlerweile mehr als zwei Drittel der Medizinstudierenden weiblich. In der Umfrage stellt sich heraus, dass die allergologische Weiterbildung bei fast 20 % der Weiterbildungsassistent*innen weniger als 10 % der Gesamtarbeitszeit ausmacht und oft außerhalb der Regelarbeitszeit stattfindet. Es sind in Zukunft sowohl flexiblere Arbeitszeitmodelle als auch kombinierte Ausbildungsmodelle zwischen Klinik und Praxis und feste Strukturen für eine fundierte Ausbildung im klinischen Alltag notwendig, um der wachsenden Anzahl allergologischer Fragestellungen v. a. bei Kindern flächendeckend gerecht werden zu können. In der neuen MWBO darf nicht nur der Nachweis von Untersuchungstechniken eine Rolle spielen, sondern sie muss auch die Betreuung von komplexen allergologischen Fällen abbilden, die gerade in der Pädiatrie vorzufinden sind, z. B. im Rahmen von Hospitationen.
Excellent mid-term osseointegration and implant survival using metaphyseal sleeves in revision total knee arthroplasty
Authors: Klim Sebastian M. , Amerstorfer Florian , Bernhardt Gerwin A. , Sadoghi Patrick , Hauer Georg , Leitner Lukas , Leithner Andreas , Glehr Mathias 
Published: January 2020

AbstractPurposeMetaphyseal fixation in revision total knee arthroplasty (RTKA) is a very promising treatment option for extended bone defects. Currently published mid-term results remain limited. The purpose was to analyse the implant durability, the clinical and the radiological mid-term results in RTKA when using metaphyseal sleeves.MethodsClinical and radiological follow-up examinations were performed in 92 patients (93 knees) with RTKA using hybrid fixation technique (cementless sleeves and stem). Radiographic measurements regarding osseointegration at the bone–sleeve interface were performed and the range of motion (ROM), a subjective satisfaction score (SSS), the American Knee Society Score (KSS), the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) as well as the SF-36 Health survey were examined. Bone defects were analysed using the Anderson Orthopaedic Research Institute (AORI) classification.ResultsNo knee had to be revised due to aseptic loosening at the time of the follow-up (mean 6.3 years ± 2.3, minimum 2 years). Satisfactory radiographic osseointegration at the sleeve/bone interface was detected in 96.1% of cases. 17 knees (18.2%) had to be re-revised, 15 of them due to a recurrent infection and 2 due to aseptic reasons (mediolateral instability and a periprosthetic fracture). The median of the ROM (96°), SSS (8), KSS (87), WOMAC (9), SF-36 MCS (55) and SF-36 PCS (38) showed very satisfying results.ConclusionNo case of aseptic loosening was found in this large series of RTKA with extended bone defects using metaphyseal sleeve fixation. In this large retrospective series, it has been shown that this technique is an excellent treatment option for extended bone defects in RTKA surgery.Level of evidenceRetrospective cohort study, level III.
Consistency of scoring rules: a reinvestigation of composition-consistency
Authors: Öztürk Z. Emel 
Published: January 2020

AbstractWe consider a collective choice problem in which the number of alternatives and the number of voters vary. Two fundamental axioms of consistency in such a setting, reinforcement and composition-consistency, are incompatible. We first observe that the latter implies four conditions each of which can be formulated as a consistency axiom on its own right. We find that two of these conditions are compatible with reinforcement. In fact, one of these, called composition-consistency with respect to non-clone winners, turns out to characterize a class of scoring rules which contains the Plurality rule. When combined with a requirement of monotonicity, composition-consistency with respect to non-clone winners uniquely characterizes the Plurality rule. A second implication of composition-consistency leads to a class of scoring rules that always select a Plurality winner when combined with monotonicity.