bluuebunny/crossref_metadata_2025_split huggingface dataset:
Integrated reliability and maintainability analysis of Computerized Numerical Control Turning Center considering the effects of human and organizational factors
Authors: Patil Rajkumar Bhimgonda 
Published: February 2019

Purpose
Reliability, maintainability and availability of modern complex engineered systems are significantly affected by four basic systems or elements: hardware, software, organizational and human. Computerized Numerical Control Turning Center (CNCTC) is one of the complex machine tools used in manufacturing industries. Several research studies have shown that the reliability and maintainability is greatly influenced by human and organizational factors (HOFs). The purpose of this paper is to identify critical HOFs and their effects on the reliability and maintainability of the CNCTC.

Design/methodology/approach
In this paper, 12 human performance influencing factors (PIFs) and 10 organizational factors (OFs) which affect the reliability and maintainability of the CNCTC are identified and prioritized according to their criticality. The opinions of experts in the fields are used for prioritizing, whereas the field failure and repair data are used for reliability and maintainability modeling.

Findings
Experience, training, and behavior are the three most critical human PIFs, and safety culture, problem solving resources, corrective action program and training program are the four most critical OFs which significantly affect the reliability and maintainability of the CNCTC. The reliability and maintainability analysis reveals that the Weibull is the best-fit distribution for time-between-failure data, whereas log-normal is the best-fit distribution for Time-To-Repair data. The failure rate of the CNCTC is nearly constant. Nearly 66 percent of the total failures and repairs are typically due to the hardware system. The percentage of failures and repairs influenced by HOFs is nearly only 16 percent; however, the failure and repair impact of HOFs is significant. The HOFs can increase the mean-time-to-repair and mean-time-between-failure of the CNCTC by nearly 65 and 33 percent, respectively.

Originality/value
The paper uses the field failure data and expert opinions for the analysis. The critical sub-systems of the CNCTC are identified using the judgment of the experts, and the trend of the results is verified with published results.
Traci Lynn Jewelry: an entrepreneur maximizing shining opportunities
Authors: Glackin Caroline E. 
Published: February 2019

Theoretical basis
The central issue in the case is opportunity identification and decision making. While the literature on direct selling is limited, much has been written about ideation, effectuation, causality and opportunity identification and assessment. Scholars of entrepreneurship debate whether entrepreneurial opportunities are identified and assessed primarily through effectuation or causation.

Research methodology
This case is based upon a combination of interviews with the protagonist, her staff and secondary research.

Case overview/synopsis
This case explores the opportunity identification, assessment and decision making of an energetic, African American, female founder and CEO in the rarely-researched direct selling channel. Dr Traci Lynn Burton founded her company at 24 with an investment of $200. In 2008, in its second incarnation, Traci Lynn Jewelry became a direct selling company and has taken bold steps. By 2018, the company was a direct selling leader and was preparing to launch a new product line. The case supports undergraduate students in understanding effectuation and causation, opportunity identification and assessment, and direct selling.

Complexity academic level
This case is primarily for upper division undergraduates. It is suitable for courses in entrepreneurial strategy, entrepreneurial marketing, general entrepreneurship emphasizing opportunity identification, opportunity assessment and/or effectuation.
Mitigating the effects of sand dunes on seismic data from the Rub al Khali basin, Saudi Arabia
Authors: Al‐Marzooq Mustafa , Diallo Mamadou S. , Etienne Vincent , Tonellot Thierry , Kaka SanLinn I. 
Published: February 2019

ABSTRACTThe Rub Al Khali region in Saudi Arabia is characterized by the presence of sand dunes separated by salt flats, also called Sabkhas. In general, the elevation of dunes in this region varies between 90 and 250 m above sea level. The presence of these sand dunes, along with the rapidly changing surface topography poses challenges for seismic data acquisition and processing. The high contrast in acoustic impedance between the dune base and the underlying formation often results in amplification of seismic waves that are recorded at stations located on the surface of sand dunes. Attempts to address the issue using conventional surface‐consistent amplitude scaling methods without reducing these amplification effects generally fail, thus compromising the suitability of the processed data for amplitude versus offset analysis. In this study, we propose a new reference site technique to reduce the effects of sand dune amplification, enabling the production of data sets that are suitable for amplitude versus offset processing. The proposed technique uses a deterministic approach to derive surface‐consistent, frequency‐dependent de‐amplification functions for shots and stations located on the dunes only. Two‐dimensional synthetic and field data examples show that the technique significantly reduces the effects of sand dune amplification.
Prediction of signatures of airgun arrays using dual near‐field hydrophones
Authors: Kryvohuz Maksym , Campman Xander 
Published: February 2019

ABSTRACTSuccessful estimation of airgun‐array signatures from near‐field measurements depends on the accuracy of poorly controlled model parameters such as the effective sea surface reflection coefficient and source depth. We propose a method for prediction of robust source signatures, which are insensitive to fluctuations of the latter parameters. The method uses vertical pairs of near‐field hydrophones to measure near‐field pressure and its vertical gradient, combination of which eliminates sea surface reflections from the near‐field data. This excludes the uncertainty related to the fluctuating sea state and source depth from the process of inversion of the near‐field data for source signature. The method explicitly separates the recorded near‐field pressure into its up and down going components, which allows one to measure the effective frequency‐ and angle‐dependent sea surface reflection coefficient right at the source, as well as to estimate the actual source depth. Tests on synthetic and field data demonstrate robust performance of the method.
Yet another moment‐tensor parameterization
Authors: Chapman Chris 
Published: February 2019

ABSTRACTThe source mechanism of a microseismic event, or any small earthquake, can be described by its moment tensor. The source type is described by a 3‐vector formed from the ordered, principal (eigen) values of the moment tensor and the source orientation from the normalized eigenvectors. The direction and magnitude of the principal‐value vector describe the source type and scalar moment, respectively. The source type can be described by the position of the principal‐value vector on the permitted lune of a unit sphere. As with any projection or cartography mapping, many parameterizations have been suggested to describe this position. Two dominate in the literature – the Riedesel–Jordan and Hudson–Pearce–Rogers parameters. All have advantages and disadvantages. In this paper, we review the most popular parameterizations, illustrating their similarities and the distortion they cause in the mapping between a uniform distribution of source types in the permitted lune and the parameter space. A new parameterization is suggested based on the solid angles formed by the principal‐value vector. This has the advantage of being simple to define geometrically in the principal‐value space (although the formulae are complicated), being naturally normalized and having a more uniform mapping than other parameterizations. However, we do not claim that this is the best or ideal parameterization, just a reasonable choice.
Florida in the Global South: How Eurocentrism Obscures Global Urban Challenges—and What We Can Do about It
Authors: Schindler Seth , Silver Jonathan 
Published: February 2019

AbstractAccording to Richard Florida, the world is in the grip of a ‘New Urban Crisis’. In his most recent book Florida recounts a visit to Medellín that provoked an epiphany in which he realized that the New Urban Crisis is global in scope. Unfortunately, Florida's discovery of the global South is informed by a deeply Eurocentric understanding of urbanization. This leads him to conclude that Southern cities should ‘unleash’ creativity, and he proposes that the United States should develop a global urban policy that would export a version of American urbanism. In this essay we deconstruct Florida's notion of the New Urban Crisis and show that its Eurocentric assumptions obscure the very real environmental, economic and political challenges facing cities in the global South and their residents.
Gabapentin‐related Deaths: Patterns of Abuse and Postmortem Levels
Authors: Tharp Amy M. , Hobron Kathrin , Wright Trista 
Published: February 2019

AbstractGabapentin, a GABA analogue, is a nonopioid prescribed for seizure control and neuralgic pain. Its abuse for recreational purposes has been increasing in recent years as the number of prescriptions also increases. In our series, we review 104 cases of decedents who tested positive for gabapentin in postmortem blood samples and an additional 53 nonfatal cases of motor vehicle drivers suspected of driving under the influence. In 47.1% of the fatality cases, gabapentin was directly involved in death. Most gabapentin fatalities had several other intoxicants present (opioids, over‐the‐counter medications, antianxiety, and antidepressant medications). In cases in which gabapentin was determined to be a cause of death, the blood concentrations ranged from 1.1 to 134.0 mg/L. Persons who died of a gabapentin‐related drug death were prescribed the drug legitimately 91.4% of the time, with 84.2% of those also having a known prior history of abuse or misuse of prescription medications.
Systemic treatment of pancreatic neuroendocrine tumors
Authors: Chan Landon L. , Chan Stephen L. 
Published: February 2019

Pancreatic neuroendocrine tumours (pNET) are a group of heterogeneous tumours. Despite being rare, their incidence is rising. While localized lesions can be cured with surgical resection, most patients present with metastatic disease. Systemic therapy is thus integral for the management of this rare entity.Numerous advancements have been made in the past decade in the systemic treatment of unresectable, metastatic pNET. Treatment options for pNET include somatostatin analogues, cytotoxic chemotherapy, targeted agents and peptide receptor radionuclide therapy. In this Review, we present the latest evidence for these treatment options.
Diet quality in adolescents with premenstrual syndrome: A cross‐sectional study
Authors: Isgin‐Atici Kubra , Kanbur Nuray , Akgül Sinem , Buyuktuncer Zehra 
Published: February 2019

AimPremenstrual syndrome (PMS) is a complex of symptoms that can seriously affect the quality of life in women. It has been suggested that the nutritional status of adult women may influence the presence and/or severity of PMS symptoms. However, little is known about this association in adolescents. The present study aimed to examine the relationship between diet quality and the presence/severity of PMS symptoms in adolescents.MethodsA case‐control study of 272 female students, aged 13–18 years, was conducted in a high school. PMS was diagnosed and the symptoms were recorded using Premenstrual Syndrome Scale (PMSS)‐2006 in 2 consecutive months. Dietary intake was assessed with 24‐hour‐dietary intake recall method and Healthy Eating Index‐2010 (HEI‐2010) score was calculated as an indicator of diet quality. Anthropometric measurements, including body weight, height, waist circumference and hip circumference were taken.ResultsPMS was diagnosed in 56.9% of the study sample. The mean HEI‐2010 score was significantly lower in the PMS group (47.5 ± 23.95) when compared to the control group (53.5 ± 20.98), P = 0.034. The PMS symptoms, anxiety (P = 0.009), depressive feelings (P = 0.016) and changes in sleeping pattern (P = 0.000) were associated with lower diet quality scores in the PMS group. No significant difference in anthropometric measurements was observed between the groups.ConclusionsThe present study suggested that adolescents with a high‐quality diet might experience depressive feelings, anxiety or changes in sleeping less when compared to those with a low quality diet. Therefore, the causal relationship between diet quality and presence/severity of PMS should be investigated in further studies.
A Fluorescence‐based Method for Estimation of Oxygen Barrier Properties of Microspheres
Authors: Kak Atisheel , Bajaj Poonam R. , Bhunia Kanishka , Nitin Nitin , Sablani Shyam S. 
Published: February 2019

AbstractIn this study, we developed a fluorescence method to quantify oxygen barrier properties for wall materials used in microencapsulation of oxygen‐sensitive compounds. We used a reversible, oxygen quenching dye, tris (4,7‐diphenyl‐1, 10‐phenanthroline) ruthenium(II) dichloride complex, as a marker to monitor oxygen transport across spray‐dried and freeze‐dried Hi‐cap100 and maltodextrin microspheres. We fit the rate of oxygen transport to Fick's second law and extrapolated an effective oxygen diffusion coefficient Deff. Results show that the Deff for spray‐dried maltodextrin and Hi‐cap100 formulations were in the range of 6.46 × 10−15 to 7.45 × 10−15 m2/s and 16.0 × 10−15 to 22.4 × 10−15 m2/s, respectively. Results also show an increasing trend in thiobarbituric acid reactive substances reaction rate constants, with an increasing Deff for each formulation. Additionally, freeze‐dried maltodextrin formulations had significantly higher Deff (31.1 × 10−15 to 36.0 × 10−15 m2/s) compared to spray‐dried matrices due to a more porous morphology. This new method provides a framework for the in situ estimation of Deff for wall materials in microspheres. Potential applications include the design and selection of wall materials for maximum oxidative stability of encapsulated ingredients.Practical ApplicationCurrently, the selection of wall materials used in microencapsulation of lipids takes a trial‐and‐error approach, which can be time consuming and prone to error. In this study, we developed a new methodology to directly assess the oxygen barrier properties of wall materials in microspheres. This method can be used by food scientists to screen wall materials in order to optimize the oxidative stability of encapsulated lipids.
Who seeks physiotherapy or exercise treatment for hip and knee osteoarthritis? A cross‐sectional analysis of the English Longitudinal Study of Ageing
Authors: Smith Toby , Collier Tom S. , Smith Benjamin , Mansfield Michael 
Published: February 2019

AbstractObjectivesTo determine the characteristics of individuals with hip and/or knee osteoarthritis who are recommended to seek physiotherapy or exercise treatment, and to explore which people are more or less likely to follow such recommendations.MethodsAll data were obtained from Wave 4 of the English Longitudinal Study of Ageing (ELSA) cohort (2008‐2009), a prospectively collected community‐based dataset. Eligibility was justified by a patient‐reported diagnosis of hip and/or knee osteoarthritis with a visual analog scale (VAS) pain score of 1 or above. Data were collected from a self‐completed questionnaire and nurse assessment visit. Prevalence of being recommended to physiotherapy or exercise (or not) and then the actioning of this recommendation (or not) were calculated and presented as 95% confidence intervals (CI). Data on characteristics of those recommended (or not) were explored using univariate analyses and then a forward selection logistic regression model.ResultsIn total, 1262 and 1877 individuals with hip and/or knee osteoarthritis pain were analyzed. This included 41% (95% CI: 0.38‐0.44) who had been recommended to seek physiotherapy or exercise treatment. Subsequently, 83% of those recommended sought these treatments. Individuals who presented with isolated knee pain, those who reported “fair” self‐reported general health and were younger had a greater chance of being recommended for physiotherapy or exercise treatment, respectively (P ≤ 0.02).ConclusionEncouragement should be given to formal and informal care providers of older people to highlight this inequality. This may then improve current and future access to evidence‐based treatments for this population.
The Behavioral Economics of Alcohol Demand in French and American University Students
Authors: Martinetti Margaret P. , Caughron Rebecca L. , Berman Hanna L. , André Judith , Sokolowski Michel B. C. , Wiley Shaun , Naassila Mickaël 
Published: February 2019

BackgroundBehavioral economic approaches have revealed several characteristics of alcohol demand (e.g., intensity, elasticity, and essential value) in university students; however, these approaches have not yet examined alcohol demand among students outside of the United States. The current study examined alcohol demand among student samples in the United States and France using a hypothetical alcohol purchase task (APT) and a novel APT Choice task, in which nonalcoholic beverages were concurrently available at a fixed low price.MethodsParticipants at each site (United States, n = 132; France, n = 132) were asked to complete an Internet‐based survey including the APT, APT Choice, Alcohol Use Disorders Identification Test, Daily Drinking Questionnaire, and Drinking Motives Questionnaire‐Revised Short Form. Group demand functions were produced for each of the 2 samples in both country‐specific and standardized drink units, and the exponential demand equation was fitted to each of the APT and APT Choice demand curves. Slope analyses were performed on the Non‐Alcoholic Cross‐Price demand to assess substitutability.ResultsAPT data revealed that in both samples, alcohol price and consumption were inversely related and demand measures were significantly associated with other alcohol measures. In addition, the availability of a nonalcoholic alternative reduced alcohol demand in both samples, with evidence of substitutability revealed by increases in cross‐price consumption.ConclusionsLow‐cost alcohol is associated with increased alcohol consumption in both French and U.S. university students, and concurrent availability of a nonalcoholic beverage within the APT both reduces alcohol demand and demonstrates behavioral economic substitutability. These findings will inform future studies investigating behavioral and environmental factors underlying transcultural differences and specific prevention efforts.
Conifer responses to a stylet‐feeding invasive herbivore and induction with methyl jasmonate: impact on the expression of induced defences and a native folivore
Authors: Rigsby Chad M. , Shoemaker Emma E. , Mallinger Mary M. , Orians Colin M. , Preisser Evan L. 
Published: February 2019

Abstract
Trees attacked by multiple herbivores need to defend themselves against dynamic biotic challenges; appropriate responses to one stressor can elicit hormonal responses that are antagonistic to another. Hemlock (Tsuga canadensis) infestation by hemlock woolly adelgid (HWA; Adelges tsugae) results in the accumulation of the defensive hormone salicylic acid.
We explored the potential for HWA infestation to interfere with anti‐folivore‐induced defence signalling and its implications for a native folivore (hemlock looper; Lambdina fiscellaria). Hemlocks were infested with HWA and/or sprayed with methyl jasmonate; foliar defences were analyzed and foliage quality for looper larvae was assessed.
Both treatments activated foliar defensive traits, including a HWA‐mediated increase in peroxidase activity and an accumulation of cell wall‐bound phenolics and lignin, as well as a methyl jasmonate‐mediated increase in lipoxygenase activity. The two treatments had an additive effect on other defensive traits and both treatments negatively affected looper performance.
These results suggest that salicylic acid and jasmonic acid are not strictly antagonistic in conifers and that both have a role in anti‐folivore defence signalling. The present study illustrates the need for a better understanding of hormone signalling, cross‐talk and induced responses in conifers.
Stock Performance and Insider Trading in Completed and Canceled Private Placements
Authors: Chen Kung‐Chi , Cheng Lee‐Young , Wu Ting‐Wen , Zhao Yan 
Published: February 2019

AbstractThis paper examines the impact of insider trading on completed and canceled private equity offerings. We find that insider trading has no impact on firms’ decisions to complete or cancel offerings, but it has a positive impact on the long‐run stock performance of the issuing firms. Firms complete the undervalued offerings and cancel the offerings when they no longer perceive their shares are undervalued. Firms with weaker operating performance are more likely to complete private placements because they regard private offering as the last resort for raising equity capital. Firms that complete private placements have significantly better long‐term stock performance than firms that cancel private placements.
Effect of Ocriplasmin on objectively assessed retinal function after treatment of vitreomacular diseases
Authors: Schatz Andreas , Seuthe Anna‐Maria , Januschowski Kai 
Published: February 2019

AbstractBackgroundThe scope of the study was the functional assessment of possible effects of intravitreally injected ocriplasmin using electroretinographical (ERG) examinations.MethodsSeven subjects suffered from pathologies within the label of ocriplasmin (Jetrea®) were examined in the study. An extended international society for clinical electrophysiology of vision ERG protocol was used for baseline recordings (before treatment) and was repeated for comparison 3 months after treatment with intravitreally injected ocriplasmin. All subjects were examined using 6 steps and a 9 Hz flicker protocol as scotopic flicker response under dark‐adapted conditions. Under light‐adapted conditions, two single‐flash responses (standard flash and On/Off protocol) and a 31 Hz flicker response was used for functional assessment.ResultsA significant reduction of amplitudes was found for the lowest stimulation intensity (0.0001 cd.s/m²) under dark‐adapted conditions after treatment (p = 0.027). All other parameters were not significantly different after treatment including the scotopic flicker response. Under light‐adapted state, the a‐ and b‐wave amplitudes were not significantly altered after treatment for single‐flash and flicker responses. The On‐ and Off‐responses were not significantly different between baseline and after the treatment.ConclusionsOne single significant difference of all examined parameters mirrors a difference due to chance, even if a negative effect of proteolytic enzymes on laminin and fibronectin of retinal cells cannot be entirely excluded. Nevertheless, this result should be respected in order to ensure a safe use of ocriplasmin for patients with vitreoretinal disorders.