bluuebunny/crossref_metadata_2025_split huggingface dataset:
Accelerated pseudospectral basis in density functional calculations
Authors: Kidd Daniel , Pearson Bailey , Covington Cody , Varga Kálmán 
Published: December 2017

AbstractSum‐accelerated pseudospectral methods herein are used to describe the kinetic energy matrix within density functional theory descriptions of few‐atom systems. The resulting energies are compared to the conventional finite difference results. It is demonstrated that the sum‐acceleration allows for significantly improved scaling with respect to the grid step size and matrix bandwidth while maintaining a computational speed equivalent with that of the finite difference description. In addition, analytical expressions for the pseudopotential matrix elements are introduced to alleviate the eggbox effect—the dependence of the energy on the relative position of the atoms and grid points.
Stepping across for social approval: Ties to independent foundations' boards after financial restatement
Authors: Lungeanu Razvan , Paruchuri Srikanth , Tsai Wenpin 
Published: December 2017

Research Summary: Integrating research on independent philanthropy and organizational misconduct, we argue that affiliations with independent foundations provide social approval benefits for firms that restate their financials. We use a panel of S&P 500 companies from 2004 to 2011 to investigate the addition of foundation board ties by restating firms. CEOs of restating firms add more new foundation board ties than CEOs of non‐restating firms, while existing corporate philanthropy and greater corporate reputation diminish this effect. We also find that new ties to foundations boards influences media tenor for restating firms more than it does for non‐restating peers. Our study offers a nuanced analysis of the post‐crisis actions of restating firms relative to non‐restating peers and highlights the relevance of ties to nonprofit boards for corporate governance.Managerial Summary: Firms oftentimes fire their top executives in the aftermath of misconduct, but such response is itself disruptive for the firm's operations. Instead, we suggest that forging ties to independent foundations can help firms in such contexts without unsettling effects. Our results show that, after a restatement event, CEOs of misconduct firms are especially likely to join new foundation boards as trustees and thus seem to be aware of the benefits of these associations. CEOs from firms with existing in‐house philanthropy or a high reputation do not join as many new foundations' boards of trustees. We also find that new firm‐foundation links are promptly and positively evaluated by the media, thus helping misconduct firms regain social approval.
Toward a behavioral theory of real options: Noisy signals, bias, and learning
Authors: Posen Hart E. , Leiblein Michael J. , Chen John S. 
Published: December 2017

Research Summary: We develop a behavioral theory of real options that relaxes the informational and behavioral assumptions underlying applications of financial options theory to real assets. To do so, we augment real option theory's focus on uncertain future asset values (prospective uncertainty) with feedback learning theory that considers uncertain current asset values (contemporaneous uncertainty). This enables us to incorporate behavioral bias in the feedback learning process underlying the option execution/termination decision. The resulting computational model suggests that firms that inappropriately account for contemporaneous uncertainty and are subject to learning biases may experience substantial downside risk in undertaking real options. Moreover, contrary to the standard option result, greater uncertainty may decrease option value, making commitment to an investment path more effective than remaining flexible.Managerial Summary: Executives recognize the need to make uncertain investments to grow their business while mitigating downside risk. The analogy between financial options and real corporate investments provides an appealing method to consider the practical challenge of such investment decisions. Unfortunately, the “real options” analogy seems to break down in practice. We identify how a second form of uncertainty confounds real options intuition, leading managers to overestimate the value of uncertain investments. We present a behavioral real options model that accounts for both forms of uncertainty and suggest how uncertainty interacts with behavioral bias in the option execution/termination decision. Our model facilitates assessment of the conditions under which investments in uncertain opportunities are usefully considered as real options, and provides a means to evaluate their attractiveness.
Who does private equity buy? Evidence on the role of private equity from buyouts of divested businesses
Authors: Kaul Aseem , Nary Paul , Singh Harbir 
Published: December 2017

Research Summary: We examine the role of nonventure private equity firms in the market for divested businesses, comparing targets bought by such firms to those bought by corporate acquirers. We argue that a combination of vigilant monitoring, high‐powered incentives, patient capital, and business independence makes private equity firms uniquely suited to correcting underinvestment problems in public corporations, and that they will therefore systematically target divested businesses that are outside their parents’ core area, whose rivals invest more in long‐term strategic assets than their parents, and whose parents have weak managerial incentives both overall and at the divisional level. Results from a sample of 1,711 divestments confirm these predictions. Our study contributes to our understanding of private equity ownership, highlighting its advantage as an alternate governance form.
Managerial Summary: Private equity firms are often portrayed as destroyers of corporate value, raiding established companies in pursuit of short‐term gain. In contrast, we argue that private equity investors help to revitalize businesses by enabling investments in long‐term strategic resources and capabilities that they are better able to evaluate, monitor, and support than public market investors. Consistent with these arguments, we find that when acquiring businesses divested by public corporations, private equity firms are more likely to buy units outside the parent's core area, those whose peers invest more in R&D than their parents, and those whose parents have weak managerial incentives, especially at the divisional level. Thus, private equity firms systematically target those businesses that may fail to realize their full potential under public ownership.
The differential effects of CEO narcissism and hubris on corporate social responsibility
Authors: Tang Yi , Mack Daniel Z. , Chen Guoli 
Published: December 2017

Research Summary: While prior studies have predominantly shown that CEO narcissism and hubris exhibit similar effects on various strategic decisions and outcomes, this study aims to explore the mechanisms underlying how narcissistic versus hubristic CEOs affect their firms differently. Specifically, we investigate how peer influence moderates the CEO narcissism/hubris—corporate social responsibility (CSR). With a sample of S&P 1500 firms for 2003–2010, we find that the positive relationship between CEO narcissism and CSR is strengthened (weakened) when board‐interlocked peer firms invest less (more) intensively in CSR than a CEO's own firm; the negative relationship between CEO hubris and CSR is strengthened when peer firms are engaged in less CSR than a CEO's own firm.Managerial Summary: Some CEOs are more narcissistic while others may be more hubristic, but these two groups of CEOs hold different attitudes toward the extent to which their firms should engage in corporate social responsibility (CSR). Our findings with a large sample of U.S. publically listed firms suggest that narcissistic CEOs care more about CSR, but hubristic CEOs care less. Interestingly, when narcissistic CEOs observe their peer firms engaging in more or less CSR than their own firms, they tend to respond in an opposite manner; in contrast, hubristic CEOs will only engage in even less CSR when their peers also do not emphasize CSR. Our findings point to a fundamental difference between CEO narcissism and hubris in terms of how they affect firms' CSR decisions based on their social comparison with peer firms.
Nanocomposite Materials for the Sodium–Ion Battery: A Review
Authors: Liang Yaru , Lai Wei‐Hong , Miao Zongcheng , Chou Shu‐Lei 
Published: December 2017

AbstractClean energy has become an important topic in recent decades because of the serious global issues related to the development of energy, such as environmental contamination, and the intermittence of the traditional energy sources. Creating new battery‐related energy storage facilities is an urgent subject for human beings to address and for solutions for the future. Compared with lithium‐based batteries, sodium–ion batteries have become the new focal point in the competition for clean energy solutions and have more potential for commercialization due to the huge natural abundance of sodium. Nevertheless, sodium–ion batteries still exhibit some challenges, like inferior electrochemical performance caused by the bigger ionic size of Na+ ions, the detrimental volume expansion, and the low conductivity of the active materials. To solve these issues, nanocomposites have recently been applied as a new class of electrodes to enhance the electrochemical performance in sodium batteries based on advantages that include the size effect, high stability, and excellent conductivity. In this Review, the recent development of nanocomposite materials applied in sodium–ion batteries is summarized, and the existing challenges and the potential solutions are presented.
Dual‐Phase CsPbBr3–CsPb2Br5 Perovskite Thin Films via Vapor Deposition for High‐Performance Rigid and Flexible Photodetectors
Authors: Tong Guoqing , Li Huan , Li Danting , Zhu Zhifeng , Xu Enze , Li Guopeng , Yu Linwei , Xu Jun , Jiang Yang 
Published: December 2017

AbstractInorganic perovskites with special semiconducting properties and structures have attracted great attention and are regarded as next generation candidates for optoelectronic devices. Herein, using a physical vapor deposition process with a controlled excess of PbBr2, dual‐phase all‐inorganic perovskite composite CsPbBr3–CsPb2Br5 thin films are prepared as light‐harvesting layers and incorporated in a photodetector (PD). The PD has a high responsivity and detectivity of 0.375 A W−1 and 1011 Jones, respectively, and a fast response time (from 10% to 90% of the maximum photocurrent) of ≈280 µs/640 µs. The device also shows an excellent stability in air for more than 65 d without encapsulation. Tetragonal CsPb2Br5 provides satisfactory passivation to reduce the recombination of the charge carriers, and with its lower free energy, it enhances the stability of the inorganic perovskite devices. Remarkably, the same inorganic perovskite photodetector is also highly flexible and exhibits an exceptional bending performance (>1000 cycles). These results highlight the great potential of dual‐phase inorganic perovskite films in the development of optoelectronic devices, especially for flexible device applications.
Direct Observation of the Growth of Lithium Dendrites on Graphite Anodes by Operando EC‐AFM
Authors: Shen Cai , Hu Guohong , Cheong Ling‐Zhi , Huang Shiqiang , Zhang Ji‐Guang , Wang Deyu 
Published: December 2017

AbstractLithium dendrite growth is one of the most challenging problems affecting the safety performance of lithium‐ion batteries (LIBs). It causes low Coulombic efficiency as well as safety hazards for LIBs. Understanding the evolution process of Li‐dendrite growth at the nanoscale is critical for solving this problem. Herein, an in situ electrochemical atomic force microscopy (EC‐AFM) investigation of the initial Li deposition in ethylene carbonate (EC)‐based and fluoroethylene carbonate (FEC)‐based electrolytes on graphite anodes is reported. These results show that the solid electrolyte interphase (SEI) formed from the FEC‐based electrolyte can suppress Li‐dendrite growth. The FEC‐based electrolyte induces formation of LiF‐rich SEI films, which are harder and denser than those formed in an EC‐based electrolyte. Due to its better mechanical properties and larger resistance, the SEI layer formed from the FEC‐based electrolyte is sufficient to prevent reduction of Li+ ions and deposition of Li+ ions on the anode surface. These results demonstrate that EC‐AFM is a powerful in situ technique for the study of lithium‐dendrite growth.
Influence of adenomyosis on pregnancy and perinatal outcomes in women with endometriosis
Authors: Scala C. , Maggiore U. Leone Roberti , Racca A. , Barra F. , Vellone V. G. , Venturini P. L. , Ferrero S. 
Published: December 2017

ABSTRACTObjectivesSeveral studies have investigated the correlation between endometriosis and adverse pregnancy and perinatal outcomes. However, the role of adenomyosis as a risk factor for adverse perinatal outcome in women with endometriosis has yet to be established. The aim of this study was to explore if fetal and maternal outcomes, in particular the incidence of a small‐for‐gestational‐age (SGA) infant, are different in pregnant women with endometriosis only from in those with the concomitant presence of diffuse or focal adenomyosis.MethodsThis was a retrospective analysis of data collected prospectively during a 3‐year period. We included 206 pregnant women with endometriosis: 148 (71.8%) with endometriosis only, 38 (18.4%) with focal adenomyosis and 20 (9.7%) with diffuse adenomyosis. Adenomyosis was diagnosed using ultrasonography and was classified as focal or diffuse. The study included patients who conceived spontaneously or by an assisted reproductive technique. Demographics, ultrasound variables and outcome were compared between women with endometriosis only and those with diffuse and those with focal adenomyosis. Logistic regression analysis was performed to assess the association of variables with SGA at birth in women with diffuse and those with focal adenomyosis.ResultsThe three groups were similar in demographic characteristics (age, body mass index, mode of conception). Patients with diffuse adenomyosis compared with those with endometriosis only had significantly lower pregnancy‐associated plasma protein A (0.61 vs 0.88 multiple of the median, P < 0.001), higher mean uterine artery pulsatility index in the first (2.23 vs 1.67, P < 0.001) and second (1.30 vs 0.94, P < 0.001) trimesters of pregnancy, and higher incidence of SGA (40% vs 10.8%, P < 0.001). No statistically significant differences were found in patients with focal adenomyosis compared with those with endometriosis only. Logistic regression analysis demonstrated that diffuse adenomyosis (odds ratio = 3.744; 95% CI, 1.158–12.099; P = 0.027) was the only independent risk factor for SGA.ConclusionsThe presence of diffuse adenomyosis in pregnant women with endometriosis is strongly associated with delivery of a SGA infant. Women with diffuse adenomyosis should be treated as being at high risk of placental dysfunction, and these pregnancies might therefore need closer monitoring. Copyright © 2017 ISUOG. Published by John Wiley & Sons Ltd.
Engineering Escherichia coli for efficient coproduction of polyhydroxyalkanoates and 5-aminolevulinic acid
Authors: Zhang Xue , Zhang Jian , Xu Jiasheng , Zhao Qian , Wang Qian , Qi Qingsheng 
Published: December 2017

Abstract
Single-cell biorefineries are an interesting strategy for using different components of feedstock to produce multiple high-value biochemicals. In this study, a strategy was applied to refine glucose and fatty acid to produce 5-aminolevulinic acid (ALA) and polyhydroxyalkanoates (PHAs). To express the ALA and PHAs dual-production system efficiently and stably, multiple copies of the poly-β-3-hydroxybutyrate (PHB) synthesis operon were integrated into the chromosome of Escherichia coli DH5αΔpoxB. The above strain harboring the ALA C5 synthesis pathway genes hemA and hemL resulted in coproduction of 38.2% PHB (cell dry weight, CDW) and 3.2 g/L extracellular ALA. To explore coproduction of ALA and poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV), the PHBV synthetic pathway was also integrated into engineered E. coli and coexpressed with hemA and hemL; cells produced 38.9% PHBV (CDW) with 10.3 mol% 3HV fractions and 3.0 g/L ALA. The coproduction of ALA with PHB and PHBV can improve the utilization of carbon sources and maximize the value derived from the feedstock.
Managing Variant Interpretation Discrepancies in Hereditary Cancer: Clinical Practice, Concerns, and Desired Resources
Authors: Zirkelbach Ellen , Hashmi Syed , Ramdaney Aarti , Dunnington Leslie , Ashfaq Myla , Nugent Elizabeth K. , Wilson Kate 
Published: December 2017

AbstractVariant interpretation is a complex process, and classification may vary between sources. This study aimed to determine the practice of cancer genetic counselors regarding discrepancies in variant interpretation and to identify concerns when counseling these discrepancies. An electronic survey was sent to genetic counselors in the NSGC Cancer Special Interest Group. The vast majority of counselors (93%) had seen a variant interpretation discrepancy in practice. A large majority (96%) of respondents indicated that they conducted their own research on reported variants. Most respondents cited variant databases as the most common resource utilized in researching variants. Approximately 33% of counselors spent 45 min or more of extra time researching a discrepancy compared to researching a variant with a single classification. When asked how they approached counseling sessions involving variant interpretation discrepancies, the free responses emphasized that counselors considered family history, clinical information, and psychosocial concerns, showing that genetic counselors tailored the session to each individual. Discrepancies in variant interpretation are an ongoing concern for clinical cancer genetic counselors, as demonstrated by the fact that counselors desired further resources to aid in addressing these discrepancies, including a centralized database (89%), guidelines from a major organization (88%), continuing education about the issue (74%), and functional studies (58%). Additionally, most respondents reported that the ideal database would be owned by a non‐profit organization (59%) and obtain information directly from laboratories (91%). This investigation was the first to address these discrepancies from a clinical point of view. The study demonstrates that discrepancies in variant interpretation are a concern for clinical cancer genetic counselors and outlines the need for additional support.
An Evidence‐Based, Community‐Engaged Approach to Develop an Interactive Deliberation Tool for Pediatric Neuromuscular Trials
Authors: Moultrie Rebecca R. , Lewis Megan A. , Paquin Ryan S. , Lucas Ann , Jarecki Jill , Peay Holly L. 
Published: December 2017

AbstractDuchenne/Becker muscular dystrophy (DBMD) and spinal muscular atrophy (SMA) are rare neuromuscular disorders that present challenges to therapeutic and clinical trial decision making. We developed an interactive, evidence‐based online tool designed to encourage thoughtful deliberation of the pros and cons of trial participation and to inform meaningful discussions with healthcare providers. Prior research demonstrates the importance of tool availability at the time each family is considering trial participation, which may be prior to the informed consent process. The tool is intended to be easily modified to other pediatric disease communities. Tool development was informed by prior qualitative research, literature reviews, and stakeholder input. Specific items were derived based on an online exploratory questionnaire of parents whose children participated in a trial for DBMD or SMA to understand motivations for participation. Parent participants in the exploratory survey reported strong impact of altruistic and individual benefit motivations and placed much greater emphasis on anticipated trial benefits than on harms when making participation decisions. We used this data to develop the evidence‐based deliberation tool using a community‐engaged approach. We initially targeted the tool for DBMD while using SMA survey data to evaluate ease of transition to that population. We conducted two iterative sets of activities to inform development and refinement of the tool: (1) community engagement of key stakeholders and (2) user experience testing. These activities suggest that the tool may increase deliberation and the weighing of benefits and harms. Ongoing evaluation will determine the acceptability and efficacy of this online intervention.
The severity and spread of adjustment problems of adolescents involved in mutually hostile interactions with others☆
Authors: Stattin Håkan , Latina Delia 
Published: December 2017

ABSTRACTIn the literature, bully‐victims report a wider range of adjustment problems than “pure” bullies or victims. This may not be confined to the school context, but might be found in other settings as well. Involvement in mutually hostile interactions across everyday settings may more reflect adolescents' characteristic way of handling conflicts with others. We used data from a longitudinal study of a community sample of adolescents (N = 992). Cluster analyses for specific everyday settings and across settings yielded clusters high on both exposing others and being exposed to hostility. Adolescents in these clusters, and particularly across settings, reported a wider range of externalizing, internalizing, and academic problems, than adolescents in other cluster groups. Longitudinal analyses showed support for bidirectional relationships between mutually hostile conditions and problematic adjustment. We conclude that adolescents' mutual hostility experiences are associated with profoundly problematic adjustment.
Integrated method of analysis, visualization, and hardware for ship motion simulation
Authors: Ham Seung-Ho , Roh Myung-Il , Zhao Luman 
Published: December 2017

Abstract
Traditionally, graphs were the only way to show the results of ship motion analyses. They did not usually impose any feeling about how fast the ship could move or how large the positions of the ship changed. Currently, integrated simulations combining physics-based analyses with IT technologies, such as virtual reality (VR), motion platforms, or other hardware, can offer a potential solution. In ship motion analyses, the dynamic ship response can be obtained by considering the environmental loads, such as ocean waves, and VR technology can be used to visualize the analysis results in the virtual world. We can see the ship motion relative to textures of real objects, including the water and sky, as if in the real world. The results calculated from the ship motion analysis can also be transferred to the motion platform to generate realistic movements. However, it is not easy to integrate three different technologies in one system because they have different purposes and have been developed individually. To solve this problem, an integrated simulation framework based on three different technologies is proposed. The proposed framework can be used to synchronize the simulation time and exchange the data through the middleware using a standardized data structure. Furthermore, we can easily add new components or remove the existing components in the simulation. To verify the efficiency and applicability of the proposed framework, the motion simulation of a drillship is applied.
Highlights We propose an integrated simulation framework for analysis, visualization, and hardware. Multibody dynamics is used for the motion analysis. We perform the integrated motion simulation of a drillship. The motion analysis, visualization, and motion platform of a drillship are perfectly synchronized.