bluuebunny/crossref_metadata_2025_split huggingface dataset:
Amputee Locomotion
Authors: Baum Brian S. , Hobara Hiroaki , Koh Kyung , Kwon Hyun Joon , Miller Ross H. , Shim Jae Kun 
Published: February 2018

Objective
The objective of this study was to investigate three-dimensional lower extremity joint moment differences between limbs and speed influences on these differences in individuals with lower extremity amputations using running-specific prostheses.

Design
Eight individuals with unilateral transtibial amputations and 8 control subjects with no amputations ran overground at three constant velocities (2.5, 3.0, and 3.5 m/sec). A 2 × 2 × 3 (group × leg × speed) repeated-measures analysis of variance with Bonferroni adjustments determined statistical significance.

Results
The prosthetic limb generated significantly greater peak ankle plantarflexion moments and smaller peak ankle varus, knee stance extension, knee swing flexion, knee internal rotation, hip stance flexion, hip swing flexion, hip swing extension, hip valgus, and hip external rotation moments than the intact limb did. The intact limb had greater peak hip external rotation moments than control limbs did, but all other peak moments were similar between these limbs. Increases in peak hip stance and knee swing flexion moments associated with speed were greater in the intact limb than in the prosthetic limb.

Conclusion
Individuals with amputation relied on the intact limb more than the prosthetic limb to run at a particular speed when wearing running-specific prostheses, but the intact joints were not overloaded relative to the control limbs.
Risk Factors for Adverse Events in Patients With Breast, Colorectal, and Lung Cancer
Authors: Weingart Saul N. , Atoria Coral L. , Pfister David , Classen David , Killen Aileen , Fortier Elizabeth , Epstein Andrew S. , Anderson Christopher , Lipitz-Snyderman Allison 
Published: February 2018

Objective
The aim of the study was to identify risk factors associated with medical errors and iatrogenic injuries during an initial course of cancer-directed treatment.

Methods
In this retrospective cohort study of 400 patients 18 years or older undergoing an initial course of treatment for breast, colorectal, or lung cancer at a comprehensive cancer center, we abstracted patient, disease, and treatment-related variables from the electronic medical record. We examined adverse events (AEs) and preventable AEs by risk factor using the χ2 or Fisher exact tests. We estimated the association between risk factors and the relative risk of an additional AE or preventable AE in multivariable negative binomial regression models with backwards selection (P < 0.1).

Results
There were 304 AEs affecting 136 patients (34%) and 97 preventable AEs affecting 53 patients (13%). In multivariable analyses, AEs were overrepresented in those with lung cancer compared with patients with breast cancer (incident rate ratio = 1.9, 95% confidence interval = 1.1–3.2). Nonwhite race (1.6, 1.0–2.6), Hispanic or Latino ethnicity (2.0, 0.9–4.1), advanced disease (1.7, 1.1–2.6), use of each additional class of high-risk nonchemotherapy medication (1.6, 1.3–1.9), and chemotherapy (2.1, 1.3–3.3) were all associated with risk of an additional AE. Preventable AEs were associated with lung cancer (7.4, 2.4–23.2), Hispanic or Latino ethnicity (5.5, 1.7–17.9), and high-risk nonchemotherapy medications (1.5, 1.2–2.0).

Conclusions
Risk factors for AEs among patients with cancer reflected patients’ underlying disease, cancer-directed therapy, and high-risk noncancer medications. The association of AEs with ethnicity merits further research. Risk factor models could be used prospectively to identify patients with cancer at increased risk of harm.
Role of community-based organizations (CBOs) in promoting citizen participation
Authors: Rafique Zain , Khoo Suet Leng 
Published: February 2018

PurposeThe current paper is an attempt to evaluate the role of CBOs in promoting citizen participation in the decision-making process of local government institutions of Gujranwala, Punjab, Pakistan. Among the most used evaluation techniques of participatory citizenship, the researchers have used an outcome driven approach based on “social goals.” Specifically, the purpose of this paper is to explore the extent to which CBOs have been effectual for the promotion of participatory citizenship in decision making of local government institutions in Punjab, Pakistan. In addition, the paper also explores the influence and success level of CBOs in incorporating the preferences and needs of public in decision-making of local government services.Design/methodology/approachFor this purpose, data have been collected through a self-administered survey questionnaire including both open and close-ended questions. A total of 424 questionnaires were collected from citizens, local government officials and CBO members. Standard survey techniques such as frequency distribution and comparative analyses were used for data analysis.FindingsIn assessing the role of CBOs in educating all the stakeholders and the general public as well as to ascertain the incorporation of public needs and values into local government decision making, the paper finds that the effectiveness of CBOs is very low to fulfill its objectives. The study suggests the need to have more programs to educate CBOs, enhance public awareness campaigns and also to put into place proper mechanisms to incorporate and evaluate the public needs.Originality/valueThis paper fulfills the much-needed research gap by the exploring the unknown contribution of CBOs in Pakistan. The paper has added value to the current literature by highlighting that unless there is strong political will and eagerness of local bureaucracy to give up their powers, the inclusion of citizen participation through CBOs in decision making of local government would just be a futile exercise.
Exploitation of aesthetic capital – disapproved by whom?
Authors: Kukkonen Iida , Åberg Erica , Sarpila Outi , Pajunen Tero 
Published: February 2018

Purpose
The purpose of this paper is to investigate the gendered double standards of exploiting physical appearance in Finland. Drawing from literature on physical appearance as a form of capital, four hypotheses on role of gender in endorsing double standards are put forth, and then empirically tested. The focus is on whether women or men are more disapproving of women exploiting their appearance. The paper also explores whether self-perceived attractiveness has an influence on the gendered endorsement of double standards.

Design/methodology/approach
The study utilises unique survey data with a split-ballot design to study gendered double standards at a societal level by means of ordered logistic regression. The data are nationally representative of 15-74-year-old Finns (n=1,600).

Findings
The main finding is that women are more prone to endorse the double standards against each other. It is particularly women who do not perceive themselves as attractive who are likely to hold double standards. Experienced unattractiveness is associated with disapproving attitudes towards the exploitation of physical appearance-related assets for both women and men. Men are overall more approving compared to women, and do not generally hold double standards.

Originality/value
Research on double standards in different spheres of life in a relatively gender equal country like Finland gives an intriguing example of gendered social inequality. The information provided by this paper deepens our understanding of gendered social stratification related to physical appearance.
Fractal modeling of elastic-plastic contact between three-dimensional rough surfaces
Authors: Yu Rufei , Chen Wei 
Published: February 2018

Purpose
This paper aims to propose a semi-analytical model to investigate the elastic-plastic contact between fractal rough surfaces. Parametric studies have been performed to analyze the dependencies between the contact properties and the scale-independent fractal parameters.

Design/methodology/approach
A modified two-variable Weierstrass-Mandelbrot function has been used to build the geometrical model of rough surfaces. The computation program was developed using software MATLAB R2015a. The results have been qualitatively validated by the existing theoretical and experimental results in the literature.

Findings
In most cases, a nonlinear relation between the load and the displacement of the rigid plane is found. Only under the condition of larger loads, an approximate linear relation can be seen for great D and small G values. (D: fractal dimension and G: fractal roughness).

Originality/value
The contact model of the cylindrical joints (conformal contact) with radial clearance is constructed by using the fractal theory and the Kogut-Etsion elastic-plastic contact model, which includes purely elastic, elastic-plastic and fully plastic contacts. The present method can generate a more reliable calculation result as compared with the Hertz contact model and a higher calculation efficiency as compared with the finite element method for the conformal contact problem.
A mixed elastohydrodynamic lubrication model based on virtual rough surface for studying the tribological effect of asperities
Authors: Zhang Hui , Dong Guangneng , Dong Guozhong 
Published: February 2018

Purpose
The main purpose of this paper is to present the effort on developing a mixed elastohydrodynamic lubrication (EHL) model to study the tribological effect of asperities on rough surface.

Design/methodology/approach
The model, with the use of the average flow Reynolds equation and the K-E elasto-plastic contact model, allows predictions of hydrodynamic pressure and contact pressure on the virtual rough surface, respectively. Then, the substrate elastic deformation is calculated by discrete convolution fast-Fourier transform (DC-FFT) method to modify the film thickness recursively. Afterwards, corresponding ball-on-disk tests are conducted and the validity of the model demonstrated. Moreover, the effects of asperity features, such as roughness, curvature radius and asperity pattern factor, on the tribological properties of EHL, are also discussed though plotting corresponding Stribeck curves and film thickness shapes.

Findings
It is demonstrated that the current model predicts very close data compared with corresponding experimental results. And it has the advantage of high accuracy comparing with other typical models. Furthermore, smaller roughness, bigger asperity radius and transverse rough surface pattern are found to have lower friction coefficients in mixed EHL models.

Originality/value
This paper contributes toward developing a mixed EHL model to investigate the effect of surface roughness, which may be helpful to better understand partial EHL.
Mindfulness and leadership flexibility
Authors: Baron Louis , Rouleau Véronique , Grégoire Simon , Baron Charles 
Published: February 2018

Purpose
In a context of great complexity, many authors have focused on the beneficial effects of leadership flexibility (Denison et al., 1995), a capacity theoretically associated with mindfulness. The purpose of this paper is to better understand the relationship between mindfulness and behavioral flexibility in leaders.

Design/methodology/approach
Data were collected from two samples: 100 active leaders from diverse economic sectors and 62 students pursuing an executive MBA degree.

Findings
The results show that mindfulness is positively associated with the overall score for leader flexibility, and with its two dualities: self-assertive and directive vs collaborative and supportive, and long-term strategy vs short-term execution. Specifically, four of the five dimensions of mindfulness (nonreactivity, nonjudging, acting with awareness and describing) were positively correlated with the overall flexibility score.

Practical implications
The results suggest that by developing mindfulness, managers might be better able to adapt their leadership style to the demands of different situations. To that end, interventions based on mindfulness are worthwhile options for use within organizations, particularly in the context of leadership development programs.

Originality/value
While most models of leadership assume a linear relationship between certain leadership behaviors and performance, other voices suggest that effective leaders need to possess great behavioral flexibility so that they can adapt with agility to the multiple needs of the people and situations around them. Few studies have examined the factors that may play a role in leadership flexibility.
The role of action-control beliefs in developing entrepreneurial expertise
Authors: Markowska Magdalena 
Published: February 2018

Purpose
The purpose of this paper is to theorize on the mechanisms underlying the development of entrepreneurial expertise. While prior studies have identified differences between the behavior of novice and expert entrepreneurs, the mechanisms that cause these differences have not received sufficient attention.

Design/methodology/approach
This paper systematically reviews the extant literature on entrepreneurial expertise and builds the conceptual framework by employing an action-control belief framework to propose mechanisms underlying the development of expert behavior.

Findings
This paper argues that differences in behavior between novice and expert entrepreneurs stem from self-perceptions of their ability to act. More specifically, stronger action-control beliefs encourage entrepreneurs to create new interpretations of the world over time; develop and use strategies that allow them to rely on perceived control over means and ends, their perceived capacity, and their agency; and hence behave more like experts.

Practical implications
This paper suggests that strategy, capacity, and control beliefs are key in individuals’ decisions of whether to engage in entrepreneurial action and that expert entrepreneurs hold stronger beliefs than novices. Positive experiences, particularly those associated with deliberate practice, contribute to developing these beliefs and, more broadly, to entrepreneurial expertise.

Originality/value
This paper proposes that the mechanism of transformation from novice to expert behavior can be attributed to positive changes in deeply held beliefs about strategy (i.e. possible means-ends frameworks), capacity (i.e. access to means), and control (i.e. perceived efficacy). Each of the beliefs can develop separately from others and at different pace. In other words, this work explains why novice and expert entrepreneurs behave differently.
What do we know about the relationship between internet-mediated interaction and social isolation and loneliness in later life?
Authors: Beneito-Montagut Roser , Cassián-Yde Nizaiá , Begueria Arantza 
Published: February 2018

Purpose
Social isolation and loneliness are recognised social, health and wellbeing problems that particularly affect later life. They have been the subject of many recent studies. Studies examining the role of the internet in addressing these problems have multiplied. However, it is still not known whether internet-mediated social interaction has any role in mitigating social isolation and or loneliness. To address this gap, the purpose of this paper is to review previous research that investigates the relationship between internet use for communication and social isolation and loneliness.

Design/methodology/approach
This paper reviews the empirical literature published since 2000 and expands on previous literature reviews by including a variety of research designs and disciplines.

Findings
Despite the recent increase in studies, there is still little evidence to show internet effects on social isolation and loneliness. It is concluded that future research programmes aimed at reducing them by the use of the internet should include more robust methodological and theoretical frameworks, employ longitudinal research designs and provide a more nuanced description of both the social phenomena (social isolation and loneliness) and internet-mediated social interaction.

Originality/value
Previous reviews are not restricted to internet-based studies and include several types of interventions aiming at reducing social isolation and/or loneliness. They do not attempt to disentangle the internet effects of social isolation and loneliness.
Optimizing the positioning of wildlife crossing structures using GPS telemetry
Authors: Bastille‐Rousseau Guillaume , Wall Jake , Douglas‐Hamilton Iain , Wittemyer George 
Published: February 2018

Abstract

Development of transportation corridors has accelerated globally, with infrastructure projects being implemented across remote ecosystems, particularly in the tropics. Such developments can have negative impacts on wildlife and their ecosystems. The importance of wildlife crossing structures to mitigate adverse effects of such features is widely recognized, but the siting of and investment in crossing structures is contentious. Data on animal movement provide valuable, highly specific information for such processes, but can present analytical challenges and remain underutilized in planning mitigation efforts.

We develop two algorithms based on Integer Linear Programming to prioritize crossing points based on frequency of use or breadth of coverage among tracked individuals. These scenarios represent metrics likely to guide the planning of crossing structures, where the former may relate to the objective of minimizing vehicle‐animal collisions and the latter on maintaining ecosystem connectivity. We exemplify the algorithms through application on a tracking dataset from over 150 African elephants living near the proposed Lamu Port‐South Sudan‐Ethiopia‐Transport corridor. We explore the influence of sampling bias on outcomes and discuss considerations to guide the application process.

Given the generally open, unfenced nature of this ecosystem, recorded movements occurred throughout the system and a third of the corridor length in the ecosystem was intersected by recorded elephant movements. The selection of crossing structure locations and their impacts on elephants varied whether we used a subsample of elephant representative of local population density or total sample of monitored individuals. The two algorithms also selected for different crossing structure locations.

Synthesis and applications. Our work shows some of the challenges of using Global Positioning System telemetry in deciding where to put crossing structures and demonstrates the need to identify the type of constraints in the system and desired crossing structure characteristics a priori. We recommend managers carefully evaluate the presence of potential biases in their data. High‐resolution data combined with objective prioritization methods allow reasoned planning actions, but are often lacking during critical infrastructure planning stages. Given the limited budget already allocated to mitigation measures in most proposed developments, the tools developed and applied here can facilitate effective spatial planning.
Net displacement and temporal scaling: Model fitting, interpretation and implementation
Authors: Street Garrett M. , Avgar Tal , Börger Luca 
Published: February 2018

Abstract

Net displacement is an integral component of numerous ecological processes and is critically dependent on the tortuosity of a movement trajectory and hence on the temporal scale of observation. Numerous attempts have been made to quantitatively describe net displacement while accommodating tortuosity, typically evoking a power law, but scale‐dependency in tortuosity limits the utility of approaches based on power law relationships that must assume scale‐invariant tortuosity.

We describe a phenomenological model of net displacement that permits both scale‐variant and scale‐invariant movement. Movement trajectories are divided into pairs of relocations specifying start‐ and end‐points, and net displacements between points are calculated across a vector of time intervals. A bootstrap is implemented to create new datasets that are independent both across and within time intervals, and the model is fitted to the bootstrapped dataset using log–log regression. We apply this model to simulated trajectories and both fine‐grain and coarse‐grain trajectories obtained from an Aldabra giant tortoise Aldabrachelys gigantea, African elephants Loxodonta africana, black‐backed jackals Canis mesomelas and Northern elephant seals Mirounga angustirostris.

The model was able to quantify the characteristics of net displacement from simulated movement trajectories corresponding to both scale‐variant (e.g. correlated random walks) and scale‐invariant (e.g. random walk) movement models. Furthermore, the model produced identical outputs across time vectors corresponding to different intervals and absolute ranges of time for scale‐invariant models. The model characterized the tortoise as generally exhibiting long scale‐invariant steps, which was corroborated by visual comparison of model outputs to observed trajectories. Elephants, jackals and seals exhibited movement parameters consistent with their known movement behaviours (nomadism, territoriality and widely ranging searching).

We describe how the model may be used to compare movements within and between species, for example by partitioning movement into scale‐variant and scale‐invariant components, and by calculating a unitless net displacement scaled to the basal movement capacities of an animal. We also identify several useful derived quantities and realistic parameter ranges and discuss how the model may be implemented in a variety of ecological studies.
Leydig cell insufficiency in hypospermatogenesis: a paracrine effect of activin–inhibin signaling?
Authors: Winters S. J. , Moore J. P. , Clark B. J. 
Published: February 2018

SummaryClinical findings and a variety of experimental models indicate that Leydig cell dysfunction accompanies damage to the seminiferous tubules with increasing severity. Most studies support the idea that intratesticular signaling from the seminiferous tubules to Leydig cells regulates steroidogenesis, which is disrupted when hypospermatogenesis occurs. Sertoli cells seem to play a pivotal role in this process. In this review, we summarize relevant clinical and experimental observations and present evidence to support the hypothesis that testicular activin signaling and its regulation by testicular inhibin may link seminiferous tubular dysfunction to reduced testosterone biosynthesis.
Hemodynamic Effects of Connection to Continuous Renal Replacement Therapy in a Pediatric Animal Model
Authors: Fernández Lafever Sarah Nicole , Santiago Maria Jose , López Jorge , González Rafael , Solana María José , Urbano Javier , Lopez‐Herce Jesus 
Published: February 2018

AbstractTo assess the hemodynamic effects of connection to continuous renal replacement therapy (CRRT) in a pediatric experimental animal model. Prospective experimental study was performed using piglets between 2 and 3 months of age and 9–11 kg. CRRT with a PrismaflexR monitor and HF20 filter (surface of 0.2 m2) was started after monitoring and anesthetic induction with an initial blood flow at 20 mL/min with 10 mL/min increases every minute until the goal flow of 5 mL/kg/min was achieved. Heart rate, blood pressure, central venous pressure, cardiac index, and renal blood flow were registered at baseline, 5, 15, 30, 60, 120, 180, 240, and 360 min. IBM SPSS Statistics 20.0 package was used for analysis. A P value of <0.05 was considered statistically significant. Thirty‐four piglets were studied. Blood pressure, cardiac output, and systemic vascular resistance significantly decreased 5‐min after CRRT connection (mean arterial pressure from 85.5 to 70.8 mm Hg, P < 0.001, cardiac index from 3.6 to 3.3 L/min/m2 P = 0.024, and systemic vascular resistance index from 1759 to 1607 dyn.s/cm5 P = 0.012). No significant changes were found in renal blood flow or central venous pressure. All parameters gradually increased at 15 and 30 min after connection but complete recovery was never achieved. Connection to CRRT produces a significant decrease in arterial pressure, cardiac index, and peripheral vascular resistances in hemodynamically stable piglets.