bluuebunny/crossref_metadata_2025_split huggingface dataset:
RF-MEMS variable matching networks and switches for multi-band and multi-mode GaN power amplifiers
Authors: Figur Sascha A. , van Raay Friedbert , Quay Rüdiger , Lohmiller Peter , Vietzorreck Larissa , Ziegler Volker 
Published: March 2014

This work presents radio-frequency-microelectromechanical-system (RF-MEMS)-based tunable matching networks for a multi-band gallium nitride (GaN) power amplifer (PA) application. In the frequency range from 3.5–8.5 GHz return losses of 5–10 dB were measured for the input network, matching impedances close to the border of the Smith chart. For the output matching network return losses of 10–20 dB and insertion losses of 1.3–2 dB were measured. The matching networks can tune the PA to four different operating frequencies, as well as changing the transistor's mode of operation from maximum delivered-output-power to maximum power-added-efficiency (PAE), while keeping the operating frequency constant. Furthermore, different single pole double throw (SPDT)-switches are designed and characterized, to be used in frequency-agile transmit/receive-modules (T/R modules).
Metabolic interdependencies between phylogenetically novel fermenters and respiratory organisms in an unconfined aquifer
Authors: Wrighton Kelly C , Castelle Cindy J , Wilkins Michael J , Hug Laura A , Sharon Itai , Thomas Brian C , Handley Kim M , Mullin Sean W , Nicora Carrie D , Singh Andrea , Lipton Mary S , Long Philip E , Williams Kenneth H , Banfield Jillian F 
Published: March 2014

Abstract
Fermentation-based metabolism is an important ecosystem function often associated with environments rich in organic carbon, such as wetlands, sewage sludge and the mammalian gut. The diversity of microorganisms and pathways involved in carbon and hydrogen cycling in sediments and aquifers and the impacts of these processes on other biogeochemical cycles remain poorly understood. Here we used metagenomics and proteomics to characterize microbial communities sampled from an aquifer adjacent to the Colorado River at Rifle, CO, USA, and document interlinked microbial roles in geochemical cycling. The organic carbon content in the aquifer was elevated via acetate amendment of the groundwater occurring over 2 successive years. Samples were collected at three time points, with the objective of extensive genome recovery to enable metabolic reconstruction of the community. Fermentative community members include organisms from a new phylum, Melainabacteria, most closely related to Cyanobacteria, phylogenetically novel members of the Chloroflexi and Bacteroidales, as well as candidate phyla genomes (OD1, BD1-5, SR1, WWE3, ACD58, TM6, PER and OP11). These organisms have the capacity to produce hydrogen, acetate, formate, ethanol, butyrate and lactate, activities supported by proteomic data. The diversity and expression of hydrogenases suggests the importance of hydrogen metabolism in the subsurface. Our proteogenomic data further indicate the consumption of fermentation intermediates by Proteobacteria can be coupled to nitrate, sulfate and iron reduction. Thus, fermentation carried out by previously unknown members of sediment microbial communities may be an important driver of nitrogen, hydrogen, sulfur, carbon and iron cycling.
Water diffusion reveals networks that modulate multiregional morphological plasticity after repetitive brain stimulation
Authors: Abe Mitsunari , Fukuyama Hidenao , Mima Tatsuya 
Published: March 2014

Significance
Repetitive brain stimulation is an established experimental protocol that induces plasticity in the stimulated site. Recent evidence indicates additional plasticity-related changes in remote nonstimulated regions. However, the neural substrates underlying the remote effects are unknown. Diffusion-weighted MRI (DWI) probes water diffusion and can be used to estimate morphological changes in cortical tissue that occur with the induction of plasticity. We used DWI to evaluate morphological changes induced by repetitive brain stimulation in human brains. Our results reveal that synchronized fluctuations in the morphology of microstructures between stimulated and remote regions might form identify networks that allow retention of plasticity-related morphological changes in remote regions. These results increase our understanding of the effects of stimulation-induced plasticity on multiple brain regions.
Crenolanib is a selective type I pan-FLT3 inhibitor
Authors: Smith Catherine Choy , Lasater Elisabeth A. , Lin Kimberly C. , Wang Qi , McCreery Melissa Quino , Stewart Whitney K. , Damon Lauren E. , Perl Alexander E. , Jeschke Grace R. , Sugita Mayumi , Carroll Martin , Kogan Scott C. , Kuriyan John , Shah Neil P. 
Published: March 2014

Significance
Rapid evolution of drug resistance associated with secondary kinase domain (KD) mutations is the best characterized mechanism of acquired resistance to effective tyrosine kinase inhibitor (TKI) therapy. Medicinal chemistry efforts have largely been devoted toward synthesizing type II TKIs that, by targeting an inactive kinase conformation, are believed to afford greater selectivity than type I TKIs that bind an active kinase conformation. The only previously described TKI with the ability to successfully suppress all resistance-conferring KD mutants (i.e. “pan-kinase” inhibitor) is the type II multikinase TKI ponatinib. Here, we demonstrate that a type I TKI can be potent, selective, and invulnerable to resistance-conferring KD mutation as a mechanism of resistance. Efforts to develop potent, selective type I pan-kinase inhibitors are warranted.
Is It Necessary to Assess for Fat‐Soluble Vitamin Deficiencies in Pediatric Patients With Newly Diagnosed Celiac Disease?
Authors: Imam Mohamad H. , Ghazzawi Yousef , Murray Joseph A. , Absah Imad 
Published: March 2014

ABSTRACTBackground:The purpose of this study was to identify the frequency of fat‐soluble vitamin deficiencies in children with celiac disease (CD) and to determine the value of routine testing for these deficiencies.Methods:We conducted a retrospective medical record review of patients with a confirmed diagnosis of CD and fat‐soluble vitamin levels measured at diagnosis between 1995 and 2012 at Mayo Clinic. Patients' demographics, fat‐soluble vitamin levels, and pertinent clinical factors at the time of diagnosis were collected.Results:Eighty‐three patients were included in the final analysis: 51 girls and 32 boys, with an average age at diagnosis of 12.8 years in girls and 13.0 years in boys. The most commonly reported symptoms were abdominal pain in 49 patients and diarrhea in 30 patients. Family history of CD was reported in 32 patients. Average vitamin levels for vitamin E, 25‐hydroxyvitamin D (25 (OH) D), and vitamin A were 7.5 mg/L, 32.8 ng/mL, and 334.5 μg/dL, respectively. No patients had vitamin A deficiency, 2 patients had vitamin E deficiency, and 9 patients had mild‐to‐moderate vitamin D deficiency (none had severe deficiency). Both patients with vitamin E deficiency were symptomatic and had complete villous atrophy. Thirty‐one patients had insufficiency of 25 (OH) D, which was less than the reported frequency of vitamin D insufficiency in the general pediatric population in the United States in 2004. None of the patients were receiving vitamin supplements at the time of diagnosis.Conclusions:Fat‐soluble vitamin deficiencies are uncommon in children with new diagnosis of CD. Routine measuring of fat‐soluble vitamins levels may not be necessary.
Early warning signs in social-ecological networks
Authors: Suweis Samir , D'Odorico Paolo 
Published: March 2014

AbstractA number of social-ecological systems exhibit complex behaviour associated with nonlinearities, bifurcations, and interaction with stochastic drivers. These systems are often prone to abrupt and unexpected instabilities and state shifts that emerge as a discontinuous response to gradual changes in environmental drivers. Predicting such behaviours is crucial to the prevention of or preparation for unwanted regime shifts. Recent research in ecology has investigated early warning signs that anticipate the divergence of univariate ecosystem dynamics from a stable attractor. To date, leading indicators of instability in systems with multiple interacting components have remained poorly investigated. This is a major limitation in the understanding of the dynamics of complex social-ecological networks. Here, we develop a theoretical framework to demonstrate that rising variance – measured, for example, by the maximum element of the covariance matrix of the network – is an effective leading indicator of network instability. We show that its reliability and robustness depend more on the sign of the interactions within the network than the network structure or noise intensity. Mutualistic, scale free and small world networks are less stable than their antagonistic or random counterparts but their instability is more reliably predicted by this leading indicator. These results provide new advances in multidimensional early warning analysis and offer a framework to evaluate the resilience of social-ecological networks.
Mirror, mirror on the wall… Who's the most opportunistic and compliant of them all?
Authors: Chen Yi-Su , Ro Young , Su Hung-Chung 
Published: March 2014

Purpose
– The present research aims to revisit the relationships between buyer dependence on suppliers, relational norms between two parties in a buyer-supplier dyad, and a buyer's tendency to either engage in opportunistic behaviors or comply with a supplier's request as an exception condition. The authors adopt a supplier's perspective to examine the supplier's anticipation of the buyer's behaviors.

Design/methodology/approach
– Based on the original studies conducted by Joshi and Arnold, the authors extend both works using a similar methodology but with a different data sample. The previously validated buyer-supplier relationship supply disruption scenario presented in the original studies is rewritten from a supplier's perspective to examine the supplier's anticipation of the buyer's behaviors. Subjects are asked to assume the role of an account manager within the key supplier firm for an electronic equipment manufacturer and to respond to how they deal with the supplier's expectation of how the buying firm may behave in terms of compliance and opportunism.

Findings
– The results show that buyer dependence is positively related to buyer compliance behaviors and that this relationship holds irrespective of the buyer's or supplier's perspective on the supply disruption scenario and irrespective of professional or student subjects. Other findings include the contingency of the moderating effect of relational norms on the link between dependence and buyer compliance on various factors, and the existence of a boundary condition for the moderation effect of relational norms on the link between dependence and buyer opportunism.

Originality/value
– The study should prove valuable to academics and professionals alike. It reinforces the notion that buyers that are more dependent and reliant on suppliers are more willing to comply with supplier's needs. Also, it considers the possibility that supply chain agents from both the buyer and supplier sides may value the effect of relational norms differently, with suppliers perceiving that relational norms have more of a direct influence on a buyer's behavior. Lastly, the replication study extends the understanding of the generalizability of the original studies.
Blended learning: making an impact on assessment and self-reflection in accounting education
Authors: Dickfos Jennifer , Cameron Craig , Hodgson Catherine 
Published: March 2014

Purpose
– The purpose of this paper is to describe the evolution of a blended learning strategy in a company law course for accounting students and to evaluate its impact on assessment and student self-reflection.

Design/methodology/approach
– A case study approach is used to describe the development of blended learning technologies within an elevator pitch assessment item in four cohorts over a two-year period. This is complemented by teacher observations, an online survey and student interviews to evaluate the assessment item, the technology used and its impact as a self-reflection and assessment tool.

Findings
– The case study reveals the benefits of blended learning technologies but also a series of logistical, assessment-related, behavioural and technological issues and how these issues were addressed. The preliminary evidence from the online survey and student interviews suggests that the blended learning technologies have facilitated flexibility in assessment (both from a student and teacher perspective), student self-reflection and fairness in assessment practices.

Originality/value
– The study identifies the benefits of and likely issues facing educators when considering the deployment of blended learning technologies to teach and assess oral communication skills. The paper contributes to pedagogy by describing the innovative use of video cameras in assessing elevator pitches and extends the literature on video presentations in higher education, in particular, its positive influence on student self-reflection.
Employer branding: strategy for improving employer attractiveness
Authors: Leekha Chhabra Neeti , Sharma Sanjeev 
Published: March 2014

Purpose– To examine the organizational attributes that attract final-year management students towards organizations. The paper aims to study the already adopted employer branding strategies and the preferred channel through which organizations should promote employer attractiveness. Based on previous studies and current findings, a conceptual model on employer branding process has been developed and presented.Design/methodology/approach– This article is based on semi-structured interviews, survey results and review of academic employer branding models.Findings– It was found that among the students, most preferred organizational attributes were organizational culture, brand name and compensation. Students rated job portal to be the preferred channel for employer attractiveness. The study showed that there exists a significant and positive correlation between strong brand image and likelihood to apply.Research limitations/implications– The survey sample was limited to private business schools only.Practical implications– One of the sources for hiring on which corporate rely heavily is private business schools. This study provides the employers an insight to make their strategies for employer branding more effective. In the process, it benefits the prospective employees as well.Originality/value– The study provides valuable inputs for formulating effective employer branding strategies. The novelty of the study is the conceptual model on the process of employer branding. One of the highlights of which is preferred communication channel for effectiveness of the strategies.
Multiproduct slot allocation heuristic to minimize storage space
Authors: Battista Claudia , Fumi Andrea , Laura Luigi , M. Schiraldi Massimiliano 
Published: March 2014

Purpose
– Since developing efficient product-location strategies represents a critical issue in operations management, due to its impact on warehouses performance in terms of both service level and operation costs, this paper aims to focus on possible improvements in the allocation of SKUs, numerically evaluating how these can lead to a reduction of both overall required warehouse space and material handling times.

Design/methodology/approach
– The undertaken approach focused on translating the warehouse management problem into a vertex colouring problem, modelling it as a multi-criteria problem and solving it through a properly modified algorithm.

Findings
– The heuristic validation on a real industrial case demonstrated its high optimization potential, and its benchmarking simulations showed performances significantly close to the best conceivable case. Indeed, though using a dedicated storage policy, the gained optimization value turned to be definitively close to the lower bound calculated through a randomized storage policy, which, differently from the proposed solution, must be inevitably supported by a warehouse management system software.

Originality/value
– This work presents an original multiproduct slot allocation heuristic developed by taking cue from vertex colouring problems and its pragmatic evaluation on a real industrial case; a benchmark with the randomized storage policy is also presented in order to underline the heuristic effectiveness and to point out possible future research opportunities.
Moderating effects of online shopping experience on customer satisfaction and repurchase intentions
Authors: O. Pappas Ilias , G. Pateli Adamantia , N. Giannakos Michail , Chrissikopoulos Vassilios 
Published: March 2014

Purpose
– Satisfaction and experience are essential ingredients for successful customer retention. This study aims to verify the moderating effect of experience on two types of relationships: the relationship of certain antecedents with satisfaction, and the relationship of satisfaction with intention to repurchase.

Design/methodology/approach
– This paper applies structural equation modelling (SEM) and multi-group analysis to examine the moderating role of experience in a conceptual model estimating the intention to repurchase. Responses from 393 people were used to examine the differences between high- and low-experienced users of online shopping.

Findings
– The research shows that experience has moderating effects on the relationships between performance expectancy and satisfaction and satisfaction and intention to repurchase. This study empirically demonstrates that prior customer experience strengthens the relationship between performance expectancy and satisfaction, while it weakens the relationship of satisfaction with intention to repurchase.

Practical implications
– Practitioners should differentiate the way they treat their customers based on their level of experience. Specifically, the empirical research demonstrates that the expected performance of the online shopping experience (performance expectancy) affects satisfaction only on high-experienced customers. Instead, the effort needed to use online shopping (effort expectancy) and the user's belief in own abilities to use online shopping (self-efficacy) influence satisfaction only on low-experienced customers. The effect of trust and satisfaction is significant on online shopping behaviour on both high- and low-experienced customers.

Originality/value
– This paper investigates how different levels of experience affect customers' satisfaction and online shopping behaviour. It is proved that experience moderates the effect of performance expectancy on satisfaction and the effect of satisfaction on intention to repurchase. It also demonstrates that certain effects (effort expectancy and performance expectancy) are valid for only one of the two examined groups, while only one effect (trust) is valid for both (high- and low-experienced).
Mechanical and wear characteristic of Y-TZP/Al2O3 nanocomposites
Authors: Hu Tianchang , Zhang Yongsheng , Hu Litian 
Published: March 2014

Purpose
– The purpose of this paper is to investigate the mechanical and wear properties of Y-TZP/Al2O3 nanocomposites.

Design/methodology/approach
– In this paper, the Y-TZP/Al2O3 nanocomposites with different crystal-sizes are designed and fabricated by hot pressing. Their mechanical and anti-wear properties are investigated, and the wear mechanism is studied by scanning electron microscopy, X-ray diffraction, and transmission electron microscope and so on.

Findings
– The experimental results indicate that the wear of Y-TZP/Al2O3 nanocomposites can be divided into two regimes: mild wear regime and normal wear regime. In mild wear regimes, the relationship between wear resistance (ɛ) and hardness (H) of the material can be described as: ɛ−1∝H−1. The corresponding relationship among wear resistance, hardness and toughness (KIC) of the material in normal wear regime can be described as: ɛ−1∝H−1K

IC
−4.

Originality/value
– In this paper, the mechanical and anti-wear properties of Y-TZP/Al2O3 nanocomposites are systematically investigated. The relation between mechanical properties and wear resistance is revealed.
Base rates and Bayes’ Theorem for decision support
Authors: Charles Allen Jared , M. Goodwill Alasdair , Watters Kyle , Beauregard Eric 
Published: March 2014

Purpose
– The purpose of this paper is to discuss and demonstrate “best practices” for creating quantitative behavioural investigative advice (i.e. statements to assist police with psychological and behavioural aspects of investigations) where complex statistical modelling is not available.

Design/methodology/approach
– Using a sample of 361 serial stranger sexual offenses and a cross-validation approach, the paper demonstrates prediction of offender characteristics using base rates and using Bayes’ Theorem. The paper predicts four dichotomous offender characteristic variables, first using simple base rates, then using Bayes’ Theorem with 16 categorical crime scene variable predictors.

Findings
– Both methods consistently predict better than chance. By incorporating more information, analyses based on Bayes’ Theorem (74.6 per cent accurate) predict with 11.1 per cent more accuracy overall than analyses based on base rates (63.5 per cent accurate), and provide improved advising estimates in line with best practices.

Originality/value
– The study demonstrates how useful predictions of offender characteristics can be acquired from crime information without large (i.e. >500 cases) data sets or “trained” statistical models. Advising statements are constructed for discussion, and results are discussed in terms of the pragmatic usefulness of the methods for police investigations.