bluuebunny/crossref_metadata_2025_split huggingface dataset:
Do research supervisors generate beneficial learning outcomes for learners?
Authors: yeung Shirley M.C. 
Published: January 2017

Purpose
The purpose of this paper is to explore the learning outcomes of students and the importance of research supervisors in writing research.

Design/methodology/approach
A questionnaire covering three dimensions: (A) skill set, (B) course arrangement, and (C) supervisor guidance was distributed to research students in Hong Kong and Chengdu, China, to examine their perceptions of a research module.

Findings
The regression results presented in this paper suggest that clear expectations of the course and the communication skills of supervisors or peers can explain around 20-30 percent of the change in the dependent variables of “awareness of using strategies to learn effectively,” “building self-confidence” and “quality of interaction.” With regard to the learning outcomes of students, the skills of using various resources, writing literature reviews and communication skills were perceived as being very important. For research supervisors, the quality of interaction, research experience and being approachable were all identified as being important.

Practical implications
The management of higher educational institutes could consider these findings when designing research curricula and selecting research supervisors so as to enhance learning outcomes.

Originality/value
The paper details learning outcomes from supervisors of writing research, which is important for the educational sector and the business world.
Coupled versus uncoupled optimal solutions for thermal and dynamic problems in spacecraft atmospheric flight
Authors: Mazzaracchio Antonio 
Published: January 2017

Purpose
This paper aims to address a significant issue related to the coupled and uncoupled treatment of the thermal and dynamic problems in the optimization of aeroassisted orbital maneuvers and the simultaneous optimal sizing of the associated heat shields. The literature generally focuses on decoupled treatments that reduce the computational load; in this manner, consequently, a decrease in the representativity of the solution manifests. The general operating mode first optimizes the trajectory and subsequently defines the optimal heat shield design based on that trajectory.

Design/methodology/approach
This paper analyzes the impact of both treatments on the evaluation of the convenience of an aeroassisted maneuver with respect to an equivalent purely propulsive exoatmospheric maneuver in relation to the achievable total mass savings of the propellant and the heat shield. Two case studies are analyzed via an optimization methodology that references genetic algorithms: the first case study is related to an aerobraking maneuver and the second case study is related to an orbital plane change.

Findings
The results demonstrate that the adoption of decoupling produces conservative solutions, i.e. unfavorable estimates, with a lower level of convenience of the aeroassisted technique compared to equivalent purely propulsive exoatmospheric maneuvers.

Originality/value
This type of analysis can provide an appropriate discernment criterion for the selection of the modus operandi based on the available computational power and the desired level of representativity.
Effect of cage configurations on flow characteristics of globe valves
Authors: S.K. Sreekala , S. Thirumalini 
Published: January 2017

Purpose
Globe valves have good throttling ability, which permits its use in regulating flows. This paper aims to understand in detail the globe valve with different cage configurations and its impact on the flow characteristics that was carried out.

Design/methodology/approach
The computational study was carried out using FLUENT, a finite volume-based numerical code. Grid sensitivity tests were done and the results were validated experimentally. The effect of cage configuration on flow characteristics and valve coefficient was studied and optimised.

Findings
Valve coefficient was found to be dependent on cage configuration and reaches its maximum for the valve with triangular shaped aperture. Methodology to improve flow performance of a globe valve with highest valve coefficient is established.

Originality/value
Studies related with caged-type globe valves having different configurations are useful for improving their flow performance. In the present investigation, globe valves with different cage configurations and throttle positions are modeled to find out the valve coefficient, pressure and velocity contours inside and outside the cage and is validated with experimental results.
On renovation of the destroyed tunnel sewer collector in Kharkiv
Authors: Garmash Alexei , Bondarenko Dmitrii , Zubko Gennadii , Goncharenko Dmitrii 
Published: January 2017

Purpose
The purpose of this study to monitor the state of deep sewerage networks is a task of current interest in connection with the emergency and pre-emergency condition of a large part of sewerage systems in the cities of Ukraine.

Design/methodology/approach
To monitor the state, performance and reliability of deep sewer collectors, it is necessary to provide monitoring wells and, during the lifetime, to carry out planned inspection of groundwater levels in the wells and to timely identify areas of filtration of wastewater into the ground.

Findings
Monitoring the state of deep sewerage networks is a task of current interest in connection with the emergency and pre-emergency condition of a large part of sewerage systems in the cities of Ukraine. To monitor the state, performance and reliability of deep sewer collectors, it is necessary to provide monitoring wells, and during the lifetime, to carry out planned inspection of groundwater levels in the wells and to timely identify areas of filtration of wastewater into the ground.

Originality/value
Implementation of works on reconstruction and strengthening an emergency section will extend the service life of the sewer collector without reducing its capacity.
Development and validation of a gas chromatography/mass spectrometry method for the determination of α- and ß-2, 7, 11-cembratriene-4, 6-diols in tobacco
Authors: Gao Wei , Wu Naiying , Sun Wenliang 
Published: January 2017

PurposeThis paper aims to present a robust method for the determination of α- and ß-2, 7, 11-cembratriene-4, 6-diols (α, ß-CBT-diol) in tobacco samples which was developed and validated by using the self-made α, ß-CBT-diol with higher purity as the standard.Design/methodology/approachAfter the ultrasonic extraction and clean-up procedures, samples were analyzed by gas chromatography/mass spectrometry in selected ion monitoring mode and full scan mode at the same time. A 1-heptadecanol was used as an internal standard. The important parameters, such as extraction conditions and derivation conditions, were optimized.FindingsUnder the optimal conditions, good results in terms of linearity (R2> 0.999) and recoveries (93.2-107 per cent) were achieved. The limits of detection were 0.120 and 0.180 μg/ml for α- and ß-CBT-diol, respectively. α, ß-CBT-diol level of analyzed tobacco was found in the range of 34.2-1.26 × 103 μg/g with relative standard deviations below 6 per cent.Originality/valueSuch a strategy opens a new door towards the development of a simple, robust and sensitive method for the determination of α, ß-CBT-diol in real samples.
Comparison of developed FLC and P&O MPPT algorithms for improving PV system performance at variable irradiance conditions
Authors: Alhamdawee Ehsan Mohsin , Farzilah Binti Mailah Nashiren , Mohd Radzi Mohd Amran , Bin Shafie Suhaidi , Hajighorbani Shahrooz , Qasim Turki Ahmed 
Published: January 2017

Purpose

This work aims to overcome the drawbacks of the nonlinear characteristics of the photo-voltaic (PV) system which are affected by the atmospheric variations.

Design/methodology/approach
As a result, the optimum power point on these characteristics accordingly changes and the efficiency of photovoltaic systems reduces. Maximum power point tracking (MPPT) algorithms track this optimum point and enhance the efficiency despite the irradiance and temperature changes.

Findings
The conventional perturbation and observation (P&O) algorithm uses fixed step sizes to increment and decrement the duty ratio that leads to slow response time and continuous oscillation around the MPP at steady state conditions. The paper proposes a fuzzy logic-based controller that overcomes the drawbacks of P&O algorithm in term of response time and the oscillation.

Originality/value
MATLAB/Simulink environment was used to model and simulate the KC200GT PV module, direct current (DC)-DC boost converter and the MPPT algorithms.
The heat recovery technologies of mine waste heat sources
Authors: Bao Lingling , Wang Jiaying , Wang Jinggang , Yu Zheng 
Published: January 2017

Purpose
Currently, China is the largest coal producer and consumer in the world. Underground mining is the main practice. In the process of deep mining, large amounts of low-temperature waste heat are available such as in the mine return air (MRA), mine water (MW), bathing waste water (BWW), etc. Without recycling, the low-temperature waste heat is discharged directly into the atmosphere or into the drainage system. The temperature range of the MRA is about 15-25°C, the relative humidity (RH) of the MRA is above 90 per cent, the temperature range of MW is about 18-20°C and the temperature of the BWW is about 30°C. All of the above parameters are relatively stable throughout the year, and thus MRA, MW and BWW are proper low-temperature heat sources for water source heat pump (WSHP) systems. The study aims to introduce the schemes for recycling the different waste heat sources and the relevant key equipment and technology of each waste heat recycle system; analyze the heat recovery performances of the MRA heat recovery technology; and compare the economies between the MRA heat recovery system and the traditional system.

Design/methodology/approach
Based on the WSHP system, heat and mass transfer efficiencies were calculated and analyzed, the outlet air velocity diffusion of the heat and mass transfer units and the parameters including air flow rate, the MRA’s dry bulb temperatures and wet bulb temperatures at inlet and outlet of MRA heat exchanger were tested. Then, it was assessed whether this system can be applied to an actual construction. An actual reconstructive project of MRA heat recovery system is taken as an example, where the cost-saving effects of heat recovery of mine waste heat sources system are analyzed.

Findings
Analysis of field test reveals that when heat transfer is stable, heat transfer capacity can be achieved: 957.6 kW in summer, 681 kW in winter and a large amount of heat was recycled. In an economic analysis, by comparing initial investment and 10 years’ operation cost with the traditional boiler and central air conditioning system, the results show that although the MRA system’s initial investment is high, this system can save CNY 6.26m in 10 years.

Originality/value
MRA has a large amount of air volume and temperature that is constant throughout the year, and hence is a good low-temperature heat source for the WSHP system. It can replace boiler heating in winter and central air conditioning refrigeration in summer. The study reveals that this technology is feasible, and has good prospects for development.
Undocumented Border Crosser Deaths in Arizona: Expanding Intrastate Collaborative Efforts in Identification
Authors: Fleischman Julie M. , Kendell Ashley E. , Eggers Christen C. , Fulginiti Laura C. 
Published: January 2017

AbstractUndocumented Border Crosser (UBC) deaths in Arizona are a major issue faced by medicolegal authorities. Currently, the Maricopa County Office of the Medical Examiner (MCOME) is in possession of over two hundred unidentified individuals, more than half of whom are presumed to be UBCs. The primary goal of this study was to address the growing number of UBC deaths in Maricopa County in order to provide a more comprehensive picture of this important anthropological issue within the state of Arizona. Of the 107 total UBC cases evaluated for the study, the majority were male and age estimates for all individuals were between 15 to 60 years old. Modeled after the recording system established by the Pima County Office of the Medical Examiner, the biographic and geographic data for these cases were entered into a new UBC database at MCOME and later added to the online Map of Migrant Mortality.
Estimating Root Zone Soil Moisture at Continental Scale Using Neural Networks
Authors: Pan Xiaojun , Kornelsen Kurt C. , Coulibaly Paulin 
Published: January 2017

AbstractThis study investigates the feasibility of artificial neural networks (ANNs) to retrieve root zone soil moisture (RZSM) at the depths of 20 cm (SM20) and 50 cm (SM50) at a continental scale, using surface information. To train the ANNs to capture interactions between land surface and various climatic patterns, data of 557 stations over the continental United States were collected. A sensitivity analysis revealed that the ANNs were able to identify input variables that directly affect the water and energy balance in root zone. The data important for RZSM retrieval in a large area included soil texture, surface soil moisture, and the cumulative values of air temperature, surface soil temperature, rainfall, and snowfall. The results showed that the ANNs had high skill in retrieving SM20 with a correlation coefficient above 0.7 in most cases, but were less effective at estimating SM50. The comparison of the ANNs showed that using soil texture data improved the model performance, especially for the estimation of SM50. It was demonstrated that the ANNs had high flexibility for applications in different climatic regions. The method was used to generate RZSM in North America using Soil Moisture and Ocean Salinity (SMOS) soil moisture data, and achieved a spatial soil moisture pattern comparable to that of Global Land Data Assimilation System Noah model with comparable performance to the SMOS surface soil moisture retrievals. The models can be efficient alternatives to assimilate remote sensing soil moisture data for shallow RZSM retrieval.
Trait and neurobiological underpinnings of negative emotion regulation in gambling disorder
Authors: Navas Juan F. , Contreras‐Rodríguez Oren , Verdejo‐Román Juan , Perandrés‐Gómez Ana , Albein‐Urios Natalia , Verdejo‐García Antonio , Perales José C. 
Published: January 2017

AbstractBackground and AimsGambling disorder is characterized by poor regulation of negative emotions and impulsive behaviours. This study aimed to (1) compare gambling disorder patients (GDPs) and healthy controls (HCs) in self‐report and brain activation measures of emotion regulation; and (2) establish its relationship with negative emotion‐driven impulsivity.DesignTwo cross‐sectional case–control studies including GDPs and HCs.Setting and ParticipantsGDPs and HCs were recruited from specialized gambling clinics in Andalusia (Spain), where they were following out‐patient treatment, and from the community, respectively. Study 1 included 41 GDPs and 45 HCs [All males; Mage = 35.22, 33.22; standard deviation (SD) = 11.16, 8.18; respectively]. Study 2 included 17 GDPs and 21 HCs (16/20 males; Mage = 32.94, 31.00; SD = 7.77, 4.60; respectively).MeasurementsIn study 1, we compared both groups on suppression and re‐appraisal emotion regulation strategies [Emotion Regulation Questionnaire (ERQ)]. In study 2, we compared GDPs with HCs on brain activation associated with down‐regulation of negative emotions in a cognitive re‐appraisal task, measured with functional magnetic resonance imaging (fMRI). In both studies, we correlated the measures of emotion regulation with mood‐related impulsivity indicated by negative urgency (UPPS‐P impulsive behaviour scale).FindingsGDPs relative to HCs showed higher levels of emotional suppression [F = 4.525; P = 0.036; means difference MHCs–MGDPs = −2.433, 95% confidence interval (CI) = −4.706, −0.159] and higher activation of the premotor cortex and middle frontal gyrus during negative emotion regulation in the fMRI task [P ≤ 0.005, cluster size (CS) > 50 voxels]. Negative urgency correlated positively with emotional suppression (r = 0.399, 95% CI = 0.104, 0.629, one‐tailed P = 0.005) and middle frontal gyrus activation during negative emotion regulation (P ≤ 0.005, CS > 50) in GDPs.ConclusionsGambling disorder is associated with greater use of emotional suppression and stronger pre‐motor cortex and middle frontal gyrus activation for regulating negative emotions, compared with healthy controls. Emotional suppression use and middle frontal gyrus activation during negative emotion regulation are linked with negative emotion‐driven impulsivity in this disorder.
Repeatability of ectopic beats from 48‐hr ambulatory electrocardiography: The Atherosclerosis Risk in Communities (ARIC) Study
Authors: Meyer Michelle L. , Soliman Elsayed Z. , Wruck Lisa M. , Mosley Thomas H. , Wagenknecht Lynne E. , Poon Anna K. , Whitsel Eric A. , Alonso Alvaro , Heiss Gerardo , Loehr Laura R. 
Published: January 2017

BackgroundThe purpose of this study was to characterize the repeatability of ectopic beats, defined by premature atrial contractions (PACs) and premature ventricular contractions (PVCs), on ambulatory electrocardiogram (aECG) monitoring and evaluate the effect of length of aECG monitoring on the repeatability estimates.MethodsThis analysis includes 95 randomly selected participants from the Atherosclerosis Risk in Communities Study (ARIC; 2011–2013). The participants wore a Holter monitor for two, 48‐hr periods separated by a mean of 38 days following an identical, standardized protocol. We divided each 48‐hr recording into 3‐, 6‐, 12‐, and 24‐hr recording periods and calculated intraclass correlation coefficients (ICCs) for PACs and PVCs and also as a percentage of the corresponding total of recorded beats per hour among these periods.ResultsAll participants had ≥1 PAC during the 48‐hr recordings, and only two participants had no PVCs. ICCs were >0.83 for all indices and recording lengths ≥12 hrs. ICCs were intermediate for 6‐hr recordings (range 0.80–0.83) and lower for 3‐hr recordings (range 0.74–0.80). The ratio of the between‐ to within‐participant variation increased with recording length.ConclusionRepeatability of PACs and PVCs was excellent for recording lengths of 6–24 hr and fair for 3 hr. Repeatability varies over shorter duration recordings within the 48‐hr recording period, and thus the present results have implications for detection algorithms for ectopic beats and can facilitate epidemiologic and clinical applications in which knowledge of measurement variability and misclassification are needed.
How to create a successful reader? Milestones in reading development from birth to adolescence
Authors: Horowitz‐Kraus Tzipi , Schmitz Rachelle , Hutton John S. , Schumacher Jayna 
Published: January 2017

AbstractReading is one of the most important academic abilities that establishes the foundation for a child's success in school. Therefore, early and accurate diagnosis of reading challenges is crucial for prevention of later academic failure. One challenge in early detection of reading difficulties is that the ability to read typically is acquired explicitly when a child is four to six years of age. However, reading ability relies on development of more basic abilities prior to reading acquisition, starting from birth.ConclusionLanguage, cognitive control and literacy milestones can be evaluated and trained from birth to better acquire reading later in life.
Joint species models reveal the effects of environment on community assemblage of freshwater mussels and fishes in European rivers
Authors: Inoue Kentaro , Stoeckl Katharina , Geist Juergen 
Published: January 2017

AbstractAimGiven that riverine systems exhibit longitudinal environmental gradients from headwater to the mouth of a river, habitat heterogeneity appears to be a major driver of spatial variation in community composition among riverine localities. As freshwater ecosystems are amongst the most endangered ecosystems in the world, community‐based conservation and multiple‐species management are necessary to maintain ecosystem integrity. We used joint species distribution models (JSDMs) to investigate the relative importance of abiotic and biotic factors that are responsible for the distribution and co‐occurrence of species in riverine ecosystems.LocationCentral and northern Europe.MethodsWe examined the general patterns of species assemblage of two endangered freshwater mussel species (Margaritifera margaritifera and Unio crassus) and their associated fish communities. We examined the patterns of positive or negative co‐occurrence in mussel and fish species and identified shared abiotic responses between mussel–host pairs.ResultsWe found that the relative importance of abiotic and residual factors and patterns of significant species correlations varied among taxa: significant residual correlations were prevalent among fish species, whereas mussel occurrences were exclusively explained by abiotic factors. Mussels and their fish hosts generally had shared abiotic responses with some mismatched responses between mussel–host pairs.Main conclusionsGiven that the composition of communities were tightly linked with abiotic factors and residual correlations, the results have significant implications for the conservation and restoration of aquatic communities. This study highlights the necessity to simultaneously consider environmental factors and species co‐occurrences in the modelling of species distributions and assemblages of riverine communities. Such a holistic community conservation approach can reveal ecological similarities and differences among species, which can help us avoid conflicts among target‐species conservation plans.
Endoscopic ultrasound‐guided antegrade biliary stenting for unresectable malignant biliary obstruction in patients with surgically altered anatomy: Single‐center prospective pilot study
Authors: Iwashita Takuji , Yasuda Ichiro , Mukai Tsuyoshi , Iwata Keisuke , Doi Shinpei , Uemura Shinya , Mabuchi Masatoshi , Okuno Mitsuru , Shimizu Masahito 
Published: January 2017

Background and AimEndoscopic retrograde cholangiography (ERCP) with biliary stenting for the treatment of unresectable malignant biliary obstruction (MBO) is challenging among patients with surgically altered anatomy. Endoscopic ultrasound‐guided antegrade biliary stenting (EUS‐ABS) was introduced as an alternative biliary drainage method, although it has not yet been well studied. In this single‐center prospective pilot study, we aimed to evaluate the feasibility and safety of EUS‐ABS for MBO in patients with surgically altered anatomy.MethodsEUS‐ABS for MBO was attempted in patients with surgically altered anatomy. In EUS‐ABS, the bile duct in the left lobe was accessed from the intestine under EUS guidance, and a guidewire was placed. Thereafter, an uncovered metallic stent was deployed at the MBO through the fistula. All devices were then removed. Technical, clinical, and adverse event rates, as well as patient characteristics and procedure details, were evaluated.ResultsTwenty patients (10 women; median age, 69 years) were enrolled in the present study. Technical and clinical success rates of EUS‐ABS were both 95% (19/20). In one patient, unsuccessful EUS‐ABS as a result of failed visualization of the left lobe of the liver with EUS was salvaged with percutaneous biliary drainage. Rate of adverse events was 20% (4/20), including mild pancreatitis in three patients and mild fever in one patient, which were successfully managed conservatively.ConclusionsEUS‐ABS for MBO in patients with surgically altered anatomy was a feasible and safe procedure. Further large scale comparison studies are needed to confirm its efficacy (Clinical Trial Registration Number: UMIN000008589).