bluuebunny/crossref_metadata_2025_split huggingface dataset:
Managing strategic supplier relationships: antecedents and outcomes
Authors: Jack Eric P. , Powers Thomas L. 
Published: February 2015

Purpose– The purpose of this paper was to examine the antecedents of strategic supplier relationships in conjunction with outcomes of product and service quality and financial performance. The management of strategic supplier relationships involves the selection and development of suppliers that share common goals and strategies of the partnering organization.Design/methodology/approach– Structural equation modeling using partial least squares is used to verify and test these relationships.Findings– Top management support, technological preparedness and trust were found to have significant positive influences on the management of strategic supplier relationships. Strategic supplier relationships were found to have a positive influence on product and service quality outcomes and financial performance.Research limitations/implications– The results provide new and original empirical evidence on the relationship between the antecedents and outcomes of strategic supplier relationships.Practical implications– The findings can contribute to the management of supplier relationships, resulting in improved product and service quality outcomes and financial performance.Originality/value– The research adds empirical evidence to the literature on the factors that contribute to effective supplier relationships and the customer- and firm-related outcomes of this process.
The enterprise system revisited: how well does it capture the company’s business network?
Authors: Ekman Peter 
Published: February 2015

Purpose– This paper aims to analyse how well enterprise systems capture the business network in which an industrial company is involved. Enterprise systems have been presented as a “dream come true” with a seamless integration of business data through a common database and software modules that can be customized to the companies’ different functions. However, research shows that companies’ utilization of enterprise systems is limited, and that internal processes are prioritized.Design/methodology/approach– European multinational companies and some of their partners have been followed through case studies between 2003 and 2010. The pattern-matching analysis has been supported by a theoretical framework that depicts industrial companies as engaged in business relationships in a network setting.Findings– The results show that the company’s relationship-oriented activities are badly captured by the enterprise system. The study highlights limitations that future enterprise systems need to address if they are to be able to offer the company a better insight into its business network.Originality/value– The traditionally internal focus on enterprise systems means that important business information transcending inter-organizational activities will be missed. To be worthy of the name enterprise system, more customer- and supplier-oriented activities need to be supported and captured.
The performance of bid-ask spread estimators under less than ideal conditions
Authors: Bleaney Michael , Li Zhiyong 
Published: February 2015

Purpose
– This paper aims to investigate the performance of estimators of the bid-ask spread in a wide range of circumstances and sampling frequencies. The bid-ask spread is important for many reasons. Because spread data are not always available, many methods have been suggested for estimating the spread. Existing papers focus on the performance of the estimators either under ideal conditions or in real data. The gap between ideal conditions and the properties of real data are usually ignored. The consistency of the estimates across various sampling frequencies is also ignored.

Design/methodology/approach
– The estimators and the possible errors are analysed theoretically. Then we perform simulation experiments, reporting the bias, standard deviation and root mean square estimation error of each estimator. More specifically, we assess the effects of the following factors on the performance of the estimators: the magnitude of the spread relative to returns volatility, randomly varying of spreads, the autocorrelation of mid-price returns and mid-price changes caused by trade directions and feedback trading.

Findings
– The best estimates come from using the highest frequency of data available. The relative performance of estimators can vary quite markedly with the sampling frequency. In small samples, the standard deviation can be more important to the estimation error than bias; in large samples, the opposite tends to be true.

Originality/value
– There is a conspicuous lack of simulation evidence on the comparative performance of different estimators of the spread under the less than ideal conditions that are typical of real-world data. This paper aims to fill this gap.
Morphology, development and reproduction of Pyrgomorpha vignaudii (Orthoptera: Pyrgomorphidae)
Authors: Kekeunou Sévilor , Mbeng Donatus , Oumarou‐Ngoute Charly , Wandji Alain Christel 
Published: February 2015

AbstractPyrgomorpha vignaudii (Guérin‐Méneville, 1849) is a pest of a wide variety of crop plants in Africa. To facilitate the search for a sustainable strategy against this pest, we have studied the post‐embryonic development, morphology and reproduction on Manihot esculenta in the laboratory. Five‐hundred and two larvae at the first stage of development obtained in the laboratory were individually reared in cages. Post‐embryonic development passed through seven stages. The total number of days spent for larval development varied from 77 to 108. The mean duration of development of stages 1, 2, 3, 4, 5 and 6 larvae were, respectively, 16.48 ± 0.43, 14.40 ± 0.55, 13.70 ± 0.61, 15.07 ± 0.84, 15.21 ± 1.31 and 16.21 ± 1.27 days. After the final molt, the females of P. vignaudii take an average of 12.7 ± 1.04 days before the first mating. The time between the first mating and first oviposition ranged from 14 to 34 days (averagely 25.2 ± 4.62 days). The females realized one to nine ovipositions during their lives. The number of eggs per egg‐pods (ootheca) varied from 16 to 93 with a mean of 45.31 ± 3.51. Our results provide valuable information for the search for a control strategy against P. vignaudii.
Point process models for presence‐only analysis
Authors: Renner Ian W. , Elith Jane , Baddeley Adrian , Fithian William , Hastie Trevor , Phillips Steven J. , Popovic Gordana , Warton David I. 
Published: February 2015

SummaryPresence‐only data are widely used for species distribution modelling, and point process regression models are a flexible tool that has considerable potential for this problem, when data arise as point events.In this paper, we review point process models, some of their advantages and some common methods of fitting them to presence‐only data.Advantages include (and are not limited to) clarification of what the response variable is that is modelled; a framework for choosing the number and location of quadrature points (commonly referred to as pseudo‐absences or ‘background points’) objectively; clarity of model assumptions and tools for checking them; models to handle spatial dependence between points when it is present; and ways forward regarding difficult issues such as accounting for sampling bias.Point process models are related to some common approaches to presence‐only species distribution modelling, which means that a variety of different software tools can be used to fit these models, includingmaxentor generalised linear modelling software.
Comparative performance of two whole‐genome capture methodologies on ancient DNA Illumina libraries
Authors: Ávila‐Arcos María C. , Sandoval‐Velasco Marcela , Schroeder Hannes , Carpenter Meredith L. , Malaspinas Anna‐Sapfo , Wales Nathan , Peñaloza Fernando , Bustamante Carlos D. , Gilbert M. Thomas P. 
Published: February 2015

Summary

Application of whole‐genome capture (WGC) methods to ancient DNA (aDNA) promises to increase efficiency of ancient genome sequencing.

We compared the performance of two recent WGC methods in enriching human aDNA within Illumina libraries built using both double‐stranded and single‐stranded build protocols. Although both methods effectively enriched aDNA, we observed consistent differences between the methods, providing the opportunity to further explore parameters influencing WGC experiments.

Our results suggest bait length has a potential influence on library enrichment. Moreover, we show WGC biases against shorter molecules that are enriched in single‐stranded libraries preparation protocols. Lastly, we document the effect of WGC on features including clonality, GC composition and repetitive DNA content.

Our findings provide insights relevant to those planning WGC on aDNA and suggest future tests and optimization to improve WGC efficiency.
Increasing the efficiency of MCMC for hierarchical phylogenetic models of categorical traits using reduced mixed models
Authors: Hadfield Jarrod D. 
Published: February 2015

SummaryIntegrating out the random effects in generalised linear mixed models (GLMM) cannot be done analytically unless the response is Gaussian. Many stochastic, deterministic or hybrid algorithms have been developed to perform the integration. With categorical data and probit link (aka the threshold model), the random effect structure can be partitioned into a part that can be easily integrated deterministically (the R‐structure) and a part that cannot (the G‐structure).We show that in the context of phylogenetic mixed models, part of the G‐structure (the phylogenetic effects at the tips) can be moved into the R‐structure and integrated out deterministically. This result follows directly from the concept of the reduced animal model from quantitative genetics (Journal of Animal Science, 51, 1980, 1277) and its implications for discrete data (Genetics Selection Evolution, 42, 2010, 1).Although the conditional distribution of the phylogenetic variance is no longer in standard from, it does provide a stable and efficient 2‐block MCMC algorithm for situations when the phylogenetic heritability is assumed to be one. We show that a GLMM with such an assumption is equivalent to the model proposed by Felsenstein (American Naturalist, 179, 2005, 145). Extensions to multivariate models are straightforward and a 3‐block algorithm can be constructed when there is only a single categorical trait but multiple Gaussian traits. With ≥2 categorical traits, an additional non‐Gibbs update is required for the correlation (sub)matrix.An implementation of these algorithms is distributed in therpackage MCMCglmm and is up to several orders of magnitude faster than published alternatives.
Neonates with Bartter syndrome have enormous fluid and sodium requirements
Authors: Azzi Antonio , Chehade Hassib , Deschênes Georges 
Published: February 2015

AbstractAimManaging neonatal Bartter syndrome by achieving adequate weight gain is challenging. We assessed the correlation between weight gain in neonatal Bartter syndrome and the introduction of fluid and sodium supplementations and indomethacin during the first 4 weeks of life.MethodsDaily fluid and electrolytes requirements were analysed using linear regression and Spearman correlation coefficients. The weight gain coefficient was calculated as daily weight gain after physiological neonatal weight loss.ResultsWe studied seven infants. The highest weight gain coefficients occurred between weeks two and four in the five neonates who either received prompt amounts of fluid (maximum 810 mL/kg/day) and sodium (maximum 70 mmol/kg/day) or were treated with indomethacin. For the two patients with the highest weight gain coefficient, water and sodium supplementations were decreased in weeks two to four leading to a significant negative Spearman correlation between weight gain and fluid supplements (r = −0.55 and −0.68) and weight gain and sodium supplementations (r = −0.96 and −0.72). The two patients with the lowest weight gain coefficient had positive Spearman correlation coefficients between weight gain and fluid and sodium supplementations.ConclusionInfants with neonatal Bartter syndrome required rapid and enormous fluid and sodium supplementations or the early introduction of indomethacin treatment to achieve adequate weight gain during the early postnatal period.
Expression pattern and clinicopathologic significance of NKD1 in human primary hepatocellular carcinoma
Authors: Zhang Sheng , Li Jie , Yin Zhen‐Yu , Liu Ping‐Guo , Zhao Wen‐Xiu , Xie Cheng‐Rong , Zhao Bi‐Xin , Wang Xiao‐Min 
Published: February 2015

It has been reported that NKD1 was an antagonist of the canonical Wnt/β‐catenin pathway. While there is little information regarding NKD1 expression pattern in human hepatocellular carcinoma (HCC). The aim of this study was to investigate the clinicopathologic significance and expression pattern of NKD1 in HCC. NKD1 protein expressions in 69 paired HCC cancer/adjacent non‐cancerous tissues were detected by Western blot. Immunohistochemical studies were performed on 58 cases of HCC with integrated clinical information. NKD1 protein expression was divided into normal and low expression group and correlations between NKD1 protein expression and clinicopathologic factors were then evaluated. Western blot results showed that NKD1 protein levels were significantly lower in cancerous tissues compared with corresponding normal tissue (p < 0.05). In addition, we found that the level of NKD1 protein expression in HCC was significantly associated with tumor size (p = 0.011), intra or extra‐hepatic metastasis (p = 0.010) and differentiation (p = 0.003). This is to our knowledge the first report investigating NKD1 protein expression pattern in HCC. Our data show that decreased NKD1 protein expression is associated with clinicopathologic factors, and suggest that NKD1 may play an important role in the development of HCC and could serve as a novel biomarker for HCC after further investigation.
CYP2B6*6 allele and age substantially reduce steady‐state ketamine clearance in chronic pain patients: impact on adverse effects
Authors: Li Yibai , Jackson Kate A. , Slon Barry , Hardy Janet R. , Franco Michael , William Leeroy , Poon Peter , Coller Janet K. , Hutchinson Mark R. , Currow David C. , Somogyi Andrew A. 
Published: February 2015

AimsKetamine analgesia is limited by low intrinsic efficacy compounded by large interindividual variability in drug responses, possibly due to the heterogeneity in drug concentration. The CYP2B6*6 allele is associated with substantially reduced ketamine metabolism in vitro and, therefore, may affect ketamine clearance. Our aims were to examine the impact of the CYP2B6*6 allele on ketamine plasma clearance and on adverse effects in chronic pain patients.MethodsCYP2B6 genotypes were identified in 49 chronic pain patients who received 24 h continuous subcutaneous infusions of ketamine. Steady‐state plasma concentrations of ketamine (Css,k) and norketamine (Css,nk) were determined using HPLC.ResultsThe median plasma clearance of ketamine after 100 mg 24 h–1 dose was significantly lower in patients with the CYP2B6*6/*6 (21.6 l h–1) and CYP2B6*1/*6 (40.6 l h–1) genotypes compared with patients with the CYP2B6*1/*1 genotype (68.1 l h–1, P < 0.001). The ketamine : norketamine plasma metabolic ratio was significantly higher in patients with the CYP2B6*6/*6 genotype than in those with the CYP2B6*1/*6 and the CYP2B6*1/*1 genotypes (P < 0.001). Patients who experienced adverse effects had lower plasma clearance (45.6 l h‐1) than those who did not (52.6 l h‐1, P = 0.04). The CYP2B6*6 genotype and age, and their combined impact explained 40%, 30% and 60% of the variation in Css,k, respectively. Similar results were observed after higher doses.ConclusionsThe CYP2B6*6 allele is associated with a substantial decrease in steady‐state ketamine plasma clearance in chronic pain patients. The decreased clearance and resultant higher plasma concentrations may be associated with a higher incidence of ketamine adverse effects.
Rebels With a Cause? Adolescent Defiance From the Perspective of Reactance Theory and Self‐Determination Theory
Authors: Van Petegem Stijn , Soenens Bart , Vansteenkiste Maarten , Beyers Wim 
Published: February 2015

The present investigation focused on adolescents' defiance against parents by drawing upon psychological reactance theory (Brehm, 1966) and self‐determination theory (Ryan & Deci, 2000). Psychological reactance would be elicited when freedom is taken away, thereby motivating individuals to engage in oppositional behavior. Throughout four studies (total N = 1,472, age ranging between 12 and 21 years), it was examined whether a controlling parenting style related to adolescents' experiences of autonomy need frustration (i.e., pressure) and reactance. Reactance, in turn, would relate to more externalizing and internalizing problems. Support was obtained for these associations in community and clinical samples, making use of different informants, and controlling for responsiveness and rule setting. A vignette‐based study provided further support. The discussion highlights theoretical and clinical implications.
Do Parents Foster Self‐Esteem? Testing the Prospective Impact of Parent Closeness on Adolescent Self‐Esteem
Authors: Harris Michelle A. , Gruenenfelder‐Steiger Andrea E. , Ferrer Emilio , Donnellan M. Brent , Allemand Mathias , Fend Helmut , Conger Rand D. , Trzesniewski Kali H. 
Published: February 2015

Close parent–child relationships are viewed as important for the development of global self‐esteem. Cross‐sectional research supports this hypothesis, but longitudinal studies provide inconsistent prospective effects. The current study uses data from Germany (N = 982) and the United States (N = 451) to test longitudinal relations between parent–child closeness and adolescent self‐esteem. The authors used self‐, parent‐, and observer‐reported parent–child closeness and self‐reported self‐esteem from ages 12 to 16. Results replicated concurrent correlations found in the literature, but six longitudinal models failed to show prospective relations. Thus, the longitudinal effect of parent–child closeness and self‐esteem is difficult to detect with adolescent samples. These findings suggest the need for additional theorizing about influences on adolescent self‐esteem development and longitudinal research with younger samples.
Shading Curves: Vector‐Based Drawing With Explicit Gradient Control
Authors: Lieng Henrik , Tasse Flora , Kosinka Jiří , Dodgson Neil A. 
Published: February 2015

AbstractA challenge in vector graphics is to define primitives that offer flexible manipulation of colour gradients. We propose a new primitive, called a shading curve, that supports explicit and local gradient control. This is achieved by associating shading profiles to each side of the curve. These shading profiles, which can be manually manipulated, represent the colour gradient out from their associated curves. Such explicit and local gradient control is challenging to achieve via the diffusion curve process, introduced in 2008, because it offers only implicit control of the colour gradient. We resolve this problem by using subdivision surfaces that are constructed from shading curves and their shading profiles.
Keratinized mucosa around implants in partially edentulous posterior mandible: 10‐year results of a prospective comparative study
Authors: Roccuzzo Mario , Grasso Giancarlo , Dalmasso Paola 
Published: February 2015

AbstractObjectiveThe aim of this research was to investigate the clinical conditions around dental implants placed in the posterior mandible of healthy or moderately periodontally compromised patients, in relation to the presence or not of keratinized mucosa (KT).Materials and methodsOne hundred and twenty‐eight patients who needed an implant in the posterior mandible were consecutively enrolled in a private specialist practice. Only one implant per patient was examined originally placed either within KT or alveolar (AM) mucosa. At 10 years, clinical and radiographic measures were recorded by a calibrated operator. The number of sites treated according to therapy modalities C and D (antibiotics and/or surgery) during the 10 years was also registered.ResultsNinety‐eight patients completed the 10‐year study. The absence of KT was associated with higher plaque accumulation, greater soft‐tissue recession (REC), and a higher number of sites that required additional surgical and/or antibiotic treatment. Patient‐reported outcomes regarding maintenance procedures presented major differences between the groups. In 11 of the 35 AM cases, additional free gingival graft (FGG) was successfully employed to reduce discomfort and to facilitate optimal plaque control.ConclusionImplants that are not surrounded by KT are more prone to plaque accumulation and REC, even in patients exercising sufficient oral hygiene and receiving adequate supporting periodontal therapy (SPT). In selected cases, particularly in the edentulous posterior mandible, where ridge resorption leads to reduced vestibular depth and lack of KT, additional FGG can be beneficial to facilitate proper oral hygiene procedures.
Laparoscopic NOSE colectomy with a camera sleeve: a technique in evolution
Authors: Wolthuis A. M. , De Buck Van Overstraeten A. , D'Hoore A. 
Published: February 2015

AbstractAimAlthough natural orifice specimen extraction (NOSE) reduces abdominal access trauma, specimen retrieval with a bag can be difficult, due to the size of the specimen. This technical note aims to show feasibility of laparoscopic NOSE colectomy with a camera sleeve based on a well‐documented video.MethodOver a 9‐month period all patients who had laparoscopic NOSE colectomy were included in the study. Camera sleeve extraction was compared with specimen retrieval bag extraction.ResultsEight patients (6 females, median age 63 years, median BMI 23 kg/m²) underwent NOSE with a camera sleeve versus nine patients with a specimen retrieval bag. Patient characteristics and operative details were similar in both groups. There were no conversions. Median hospital stay was 4 days in both groups.ConclusionLaparoscopic NOSE colectomy with a camera sleeve is feasible, but it remains to be shown that this technical modification will lead to an increase in indications for left‐sided colonic resections.