bluuebunny/crossref_metadata_2025_split huggingface dataset:
A Multifunctional Carbohydrazide‐Based Chromofluorescent Sensor for the Selective Detection of Cu(II) and Zn(II) Ion
Authors: Swami Suman , Agarwala Arunava , Verma Ved Prakash , Shrivastava Rahul 
Published: December 2017

AbstractA series of multifunctional carbohydrazide based chromofluorescent sensor molecules derived from carbohydrazide, 4‐formyl‐1‐substituted phenyl‐pyrazole‐3‐carboxylate and 2‐hydroxy‐naphthaldehyde were successfully designed and synthesized. The synthesized sensor molecules exhibit significant red shift in their absorption spectra with visual color changes on interaction with Cu(II) and Zn(II) ions. In addition, the optimized sensor showed excellent selectivity towards Cu(II) and Zn(II) ions with fluorescence “turn off” and “turn on” modes respectively. Along with this, anion recognition studies were carried out using UV‐visible and fluorescence spectrophotometric titrations which revealed that synthesized sensors also exhibit selective sensing of F−, CH3COO− and H2PO4− ions via H‐bond interaction and subsequent deprotonation to elicit distinct visual color change from light yellow to orange with significant quenching in its emission intensity. Furthermore, the in‐situ prepared sensor‐anion adduct solution exhibited colorimetric “On‐Off” sensing of Cu(II) and Zn(II) ions, which was confirmed through UV‐visible titration experiments.
Template‐Free Synthesis of High‐Content Vanadium‐Doped ZSM‐5 with Enhanced Catalytic Performance
Authors: Liu Xianfeng , Zhong Shenglai , Yang Fu , Su Hang , Lin Wei , Chen Junchao , Peng Luming , Zhou Shijian , Kong Yan 
Published: December 2017

AbstractThe high cost of preparation of transition metal doped ZSM‐5 zeolite is limited to the use of organic template such as tetrapropylammonium hydroxide or tetrapropylammonium bromide. In this work, vanadium atom was successfully incorporated into the framework of ZSM‐5 zeolite without using any organic template. Moreover, the method not only decreases the preparation cost of vanadium doped ZSM‐5, but also greatly enhances the utilization ratio of vanadium atom. Vanadium atom mainly exists as tetrahedral coordination in the framework of ZSM‐5 which was demonstrated by the ultraviolet visible and X‐ray photoelectron spectrum. Furthermore, vanadium doped ZSM‐5 performs high and stability catalytic activity in the oxidation of styrene compared to that of the catalyst prepared by the traditional organic template method ascribe to the greatly increase of tetrahedral vanadium species.
Mixing of a Viscoplastic Fluid in Cylindrical Vessels Equipped with Paddle Impellers
Authors: Ameur Houari 
Published: December 2017

AbstractThe mixing characteristics of a complex fluid by paddle impellers in cylindrical reactors are explored in this paper. The working fluid has a shear thinning behavior with yield stress. The Hershel‐Bulkley model is used to describe the rheological behavior of fluid. The paddle impeller has two blades and it rotates at low Reynolds number varying in the range from 0.1 to 70. Effect of blade height (h/D=0.1, 0.4, 0.7 and 0.95), blade width (d/D=0.2, 0.4, 0.6 and 0.8) and Reynolds number on cavern size and power consumption are explored. With a great blade height, the obtained results revealed the formation of a dead zone near the blade tip at low Reynolds number. This poor mixing region disappear with a sufficient impeller rotational speed: from Rey=30 found with this kind of fluid. Two recirculation loops are observed with an excessive increased blade width (with d/D=0.8 found here). The well‐mixed region size will be enlarged with the rise of blade size, but with an additional energy cost. Also, the rise of Reynolds number permits a reduction in energy consumption and an enhancement in cavern size.
Economic strain and support in couple: The mediating role of positive emotions
Authors: Rusu Petruta P. , Hilpert Peter , Falconier Mariana , Bodenmann Guy 
Published: December 2017

AbstractThis study examined positive emotions as mediating mechanisms in the association between economic strain and spouses' supportive behaviour. Data were collected from 295 married couples living in Romania. Results from the Actor–Partner Mediator Model indicated that economic strain had a negative indirect effect on spouses' supportive dyadic coping due to its negative association with partners' positive emotions (joy, contentment, and pride). For both partners, positive emotions decreased when they experienced economic strain, which in turn reduced supportive dyadic coping in couples. These findings have theoretical implications in explaining the association of economic strain with partners' positive emotions and behaviours and also clinical implications for practitioners working with couples experiencing economic strain.
Attacking your partners: Strategic alliances and competition between partners in product markets
Authors: Cui Victor , Yang Haibin , Vertinsky Ilan 
Published: December 2017

Research Summary: This study contributes to the literature on strategic alliances by examining the impact of collaboration on competition between partners in product markets. We integrate the alliance learning and social network perspectives to examine how different combinations of exploratory and exploitative alliances between a firm and its partner influence the firm’s competition against its partner in product markets. Using a longitudinal dataset collected in the U.S. pharmaceutical industry (1984–2003), we find an inverted U‐shaped relationship between relative exploration (i.e., the proportion of exploratory alliances in the collaborative portfolio between a firm and its partner) and the firm’s competition against its partner. This relationship is negatively moderated by firms’ relational and structural embeddedness, but positively moderated by their positional embeddedness.
Managerial Summary: This study examines how different combinations of exploratory and exploitative alliances between two firms affect their competition in the product market. Using a 20‐year dataset collected in the U.S. pharmaceutical industry, we find that the proportion of exploratory alliances (i.e., joint development of critical innovations) in the alliance portfolio between a firm and its partner increases the firm’s competition against its partner, up to a tipping point at which such competition starts to decline. Given a certain combination of the two types of alliances, such competition is stronger if the firm has more alternative allies than its partner but weaker if the firm and its partner have previously collaborated or share common allies in their networks.
Threat of falling high status and corporate bribery: Evidence from the revealed accounting records of two South Korean presidents
Authors: Jeong Yujin , Siegel Jordan I. 
Published: December 2017

Research Summary: Social status and its dynamics may be an important predictor of which firms will engage in large‐scale bribery. Prior theory is incomplete, however, and prior studies have lacked comprehensive and reliable data on firm‐level bribery decisions. We offer a new theoretical prediction and a novel data set on high‐level corruption in South Korea, where the accounting records of two presidents in the 1987–1992 era were exposed to after‐the‐fact legal and public scrutiny. We find that, controlling for a range of alternative explanations, the threat of falling high status—that is, the combination of longstanding high social status with current‐period mediocre economic performance relative to that of industry peers—is a statistically and economically meaningful predictor of increases in the amount of large‐scale corporate bribery.Managerial Summary: What leads companies to engage in large‐scale bribery of senior politicians? Our concept of “threat of falling high status” refers to a circumstance where companies that have historically enjoyed high status through their owner families’ elite marriage networks experience mediocre economic performance relative to their peers. We show that this threat of falling high status is a notable determinant of large‐scale corporate bribery of senior politicians, using court data on corporate bribery of two South Korean presidents during 1987–1992. The implication of our study is twofold. Companies can strengthen internal control systems to avoid any large‐scale illegal activities at a higher level. Law enforcement agencies can also implement targeted monitoring programs to preempt illegal activities among companies facing the threat of falling high status.
Revisiting the imitation assumption: Why imitation may increase, rather than decrease, performance heterogeneity
Authors: Posen Hart E. , Martignoni Dirk 
Published: December 2017

Research Summary: Imitation is a central construct in strategy theory because it is assumed to diminish inter‐firm performance heterogeneity within an industry. We revisit this assumption, which is premised on the logic that imitated practices act directly to make the imitator more similar to its target. This logic is incomplete because imitation also acts indirectly—via its effect on an imitator's post‐imitation experiential learning efforts through which it refines imitated practices and fills remaining knowledge gaps. We examine how an imitator's focus of attention during this post‐imitation experiential learning process impacts performance heterogeneity. Employing a computational model, we contrast the heterogeneity resulting from imitative entry with that from de novo (non‐imitative) entry and identify conditions under which imitation may increase, rather than decrease, inter‐firm performance heterogeneity.Managerial Summary: Imitation is commonly assumed to be a low‐risk strategy by which firms can narrow the performance gap to the market leader. This assumption is predicated on an understanding of imitation that neglects the impact of imitation on subsequent, post‐imitation, learning. Such learning serves to refine the imitated practices and fill remaining knowledge gaps. Our theory suggests that imitation is more risky than is typically assumed. Imitation leads to bifurcated performance outcomes. An imitator is more likely to: (a) catch up to the market leader, and (b) perform far worse than it would have without imitation. Key factors driving the riskiness of imitation are the observability of the market leader's practices and an imitator's decision regarding its focus of attention in post‐imitation learning.
Do investors actually value sustainability? New evidence from investor reactions to the Dow Jones Sustainability Index (DJSI)
Authors: Hawn Olga , Chatterji Aaron K. , Mitchell Will 
Published: December 2017

Research Summary: Research exploring investor reactions to sustainability has substantial empirical limitations, which we address with a large‐scale longitudinal financial event study of the first global sustainability index, DJSI World. We examine investor reactions to firms from 27 countries over 17 years that are added, deleted, or continue on the index. We find that once relevant controls and comparisons to observationally equivalent firms beyond the index are included, DJSI events have only limited significance and/or materiality. Nonetheless, investors' valuation of sustainability around the world has evolved over time, involving diminishing reactions to U.S. firms and increasing benefits, particularly of continuation on the index, over time. The study highlights the importance of careful analysis and longitudinal global samples in making inferences about the financial effects of social performance.Managerial Summary: The debate about how investors perceive corporate social responsibility (CSR) predates Milton Friedman's famous statement that the only social responsibility of business is to increase profits. Although extensive research has studied whether sustainability contributes to financial performance, we have yet to understand whether investors believe it pays off. This financial event study of reactions to the addition, continuation, and deletion from DJSI World, the first global sustainability index, shows that investors care little about DJSI announcements. Nonetheless, there is some evidence that global assessments of sustainability are converging and that investors may increasingly be valuing continuation on the DJSI, suggesting that firms may gain at least limited benefits from reliable sustainability activities.
Delta-Like 4 Activates Notch 3 to Regulate Self-Renewal in Skeletal Muscle Stem Cells
Authors: Low SiewHui , Barnes Josephine L. , Zammit Peter S. , Beauchamp Jonathan R. 
Published: December 2017

Abstract
Notch signaling is essential to maintain skeletal muscle stem cells in quiescence. However, the precise roles of different Notch receptors are incompletely defined. Here, we demonstrate a role for Notch3 (N3) in the self-renewal of muscle stem cells. We found that N3 is active in quiescent C2C12 reserve cells (RCs), and N3 over-expression and knockdown studies in C2C12 and primary satellite cells reveal a role in self-renewal. The Notch ligand Delta-like 4 (Dll4) is expressed by newly formed myotubes and interaction with this ligand is sufficient to maintain N3 activity in quiescent C2C12 RCs to prevent activation and progression into the cell cycle. Thus, our data suggest a model whereby during regeneration, expression of Dll4 by nascent muscle fibers triggers N3 signaling in associated muscle stem cells to recruit them to quiescence, thereby renewing the stem cell pool.
Experimental study of L‐shaped precast RC shear walls with middle cast‐in‐situ joint
Authors: Li Jianbao , Wang Lu , Lu Zheng , Wang Yan 
Published: December 2017

SummaryPrecast shear walls, as an environmentally friendly building system, have been vigorously developed in China. There are many vertical and horizontal joints on precast reinforced concrete shear wall system, which certainly have a significant effect on seismic performance of structures. In this paper, 3 L‐shaped precast reinforced concrete shear walls that were assembled by 2 precast parts through a middle cast‐in‐situ joint and a compared 1 completely cast‐in‐situ were tested under low frequency cyclic loading to investigate their seismic behaviors. The vertical distributed reinforcements in the three precast specimens were equivalently spliced by grouting sleeves arranged along the center line of the wall, and the horizontal reinforcements were directly anchored in cast‐in‐situ joints. The experimental results, including failure mode, yielding load and displacement, skeleton curve, energy dissipation, stiffness degradation, ductility, and so forth were presented in the paper. The results show that the precast specimens have similar bearing capacity whereas much better deformation capacity and ductility compared to the cast‐in‐situ specimen. Additionally, the experimental results of ultimate shear capacity of specimens were also compared with that of the calculation results. These results indicate that the tested precast shear walls have good and reliable seismic performance and can be used as a structural member in engineering projects.
Optimizing parameters of tuned mass damper subjected to critical earthquake
Authors: Kamgar Reza , Samea Parham , Khatibinia Mohsen 
Published: December 2017

SummaryTuned mass damper (TMD) has been proposed as one of the vibration control methods for rehabilitation of buildings. Because the parameters of TMD can significantly affect the seismic performance of structures, many researches focused on finding the optimum parameters. Because earthquakes are random phenomena and future earthquakes in comparison with past earthquakes may be more destructive, the optimum design of TMD subjected to selected earthquakes can be nonconservative. Hence, the main contribution of this paper is to present the optimal design of TMD for the seismic vibration control of a structure subjected to a critical earthquake that produces the most severe response of a structure. In order to achieve this purpose, the parameters of TMD are optimized through minimizing the maximum displacement of the roof. First, three optimization methods are used to obtain the optimal parameters of TMD for a 10‐story shear building subjected to the critical earthquakes. Finally, the responses of the controlled and uncontrolled buildings such as the roof displacement, strokes, transfer function, and different forms of energy are compared. Results show that the optimum designs of TMD not only effectively reduce the roof displacement but also improve the seismic performance of the building.
Formally sound implementations of security protocols with JavaSPI
Authors: Sisto Riccardo , Bettassa Copet Piergiuseppe , Avalle Matteo , Pironti Alfredo 
Published: December 2017

Abstract

Designing and coding security protocols is an error prone task. Several flaws are found in protocol implementations and specifications every year. Formal methods can alleviate this problem by backing implementations with rigorous proofs about their behavior. However, formally-based development typically requires domain specific knowledge available only to few experts and the development of abstract formal models that are far from real implementations. This paper presents a Java-based protocol design and implementation framework, where the user can write a security protocol symbolic model in Java, using a well defined subset of the language that corresponds to applied
π
-calculus. This Java model can be symbolically executed in the Java debugger, formally verified with ProVerif, and further refined to an interoperable Java implementation of the protocol. Soundness theorems are provided to prove that, under some reasonable assumptions, a simulation relation relates the Java refined implementation to the symbolic model verified by ProVerif, so that, for the usual security properties, a property verified by ProVerif on the symbolic model is preserved in the Java refined implementation. The applicability of the framework is evaluated by developing an extensive case study on the popular SSL protocol.
Reduced methanol input induces increased protein output byAOX1promoter in atrans-acting elements engineeredPichia pastoris
Authors: Wang Jinjia , Wang Xiaolong , Shi Lei , Zhang Yuanxing , Zhou Xiangshan , Cai Menghao 
Published: December 2017

AbstractHigh oxygen consumption and heat release caused by methanol catabolism usually bring difficulties to industrial scale-up and cost for protein expression driven by methanol-induced AOX1 promoter in Pichia pastoris. Here, reduced methanol feeding levels were investigated for expression of insulin precursor in a trans-acting elements engineered P. pastoris strain MF1-IP. Insulin precursor expression level reached 6.69 g/(L supernatant) at the methanol feeding rate of 6.67 mL/(h·L broth), which was 59% higher than that in the wild-type strain WT-IP at the methanol feeding rate of 12 mL/(h·L broth). Correspondingly, the insulin precursor expression level in fermentation broth and maximum specific insulin precursor production rate was 137 and 77% higher than the WT-IP, respectively. However, oxygen consumption and heat evolution were reduced, and the highest oxygen consumption rate and heat evolution rate of the MF1-IP were 18.0 and 37.7% lower than the WT-IP, respectively.
Clinical Cardiovascular Genetic Counselors Take a Leading Role in Team‐based Variant Classification
Authors: Reuter Chloe , Grove Megan E. , Orland Kate , Spoonamore Katherine , Caleshu Colleen 
Published: December 2017

AbstractWe sought to delineate the genetic test review and interpretation practices of clinical cardiovascular genetic counselors. A one‐time anonymous online survey was taken by 46 clinical cardiovascular genetic counselors recruited through the National Society of Genetic Counselors Cardiovascular Special Interest Group. Nearly all (95.7%) gather additional information on variants reported on clinical genetic test reports and most (81.4%) assess the classification of such variants. Clinical cardiovascular genetic counselors typically (81.0%) classify variants in collaboration with cardiologist and/or geneticist colleagues, with the genetic counselor as the team member who is primarily responsible. Variant classification is a relatively recent (mean 3.2 years) addition to practice. Most genetic counselors learned classification skills on the job from clinical and laboratory colleagues. Recent graduates were more likely to have learned this in graduate school (p < 0.001). Genetic counselors are motivated to take responsibility for the classification of variants because of prior experiences with variant reclassification, inconsistencies between laboratories, and incomplete laboratory reports. They are also driven by a sense of professional duty and their proximity to the clinical context. This practice represents a broadening of the skill set of clinical cardiovascular genetic counselors and a unique expertise that they contribute to the interdisciplinary teams in which they work.
Mechanical stress increases brain amyloid β, tau, and α‐synuclein concentrations in wild‐type mice
Authors: Levy Nogueira Marcel , Hamraz Minoo , Abolhassani Mohammad , Bigan Erwan , Lafitte Olivier , Steyaert Jean‐Marc , Dubois Bruno , Schwartz Laurent 
Published: December 2017

AbstractIntroductionExposure to traumatic brain injury is a core risk factor that predisposes an individual to sporadic neurodegenerative diseases. We provide evidence that mechanical stress increases brain levels of hallmark proteins associated with neurodegeneration.MethodsWild‐type mice were exposed to multiple regimens of repetitive mild traumatic brain injury, generating a range of combinations of impact energies, frequencies, and durations of exposure. Brain concentrations of amyloid β 1–42 (Aβ1–42), total tau, and α‐synuclein were measured by sandwich enzyme‐linked immunosorbent assay.ResultsThere was a highly significant main effect of impact energy, frequency, and duration of exposure on Aβ1–42, tau, and α‐synuclein levels (P < .001), and a significant interaction between impact energy and duration of exposure for Aβ1–42 and tau (P < .001), but not for α‐synuclein.DiscussionDose‐dependent and cumulative influence of repetitive mild traumatic brain injury–induced mechanical stress may trigger and/or accelerate neurodegeneration by pushing protein concentration over the disease threshold.
kW-level, narrow-linewidth linearly polarized fiber laser with excellent beam quality through compact one-stage amplification scheme
Authors: Jiang Man , Ma Pengfei , Huang Long , Xu Jiangming , Zhou Pu , Gu Xijia 
Published: December 2017

In this manuscript, we demonstrate high-power, narrow-linewidth linearly polarized fiber laser with excellent beam quality through compact one-stage amplification scheme. By employing a single-mode–multimode–single-mode structure seed laser, a linearly polarized Yb-doped fiber laser with narrow linewidth and high output power is achieved. This laser, when used as a master oscillator, can be capable of suppressing the ASE in the process of power amplification. Thus, only one-stage amplification structure is used to scale up the laser power, and linearly polarized output with a polarization extinction ration of 14 dB, a narrow linewidth of 0.3 nm and an output power of 1018 W are achieved. Moreover, due to the good beam quality of seed laser and the well-designed amplifier stage, the beam quality of the output laser is near-diffraction-limited with $M_{x}^{2}\sim 1.18$ and $M_{y}^{2}\sim 1.24$ at the maximum power, and without mode instability occurring.