bluuebunny/crossref_metadata_2025_split huggingface dataset:
Retaining customers after service failure recoveries: a contingency model
Authors: Wang Kai-Yu , Hsu Li-Chun , Chih Wen-Hai 
Published: July 2014

Purpose
– The purpose of this paper is to propose and empirically test a customer retention contingency model in service failure settings. Specifically, this research investigates how service recovery satisfaction (SRS) influences the relationship quality (RQ)-behavior chain. It also examines the moderating role of RQ and switching cost (SC) in the proposed model.

Design/methodology/approach
– A two-part survey study was performed and 303 valid responses from banking services users were obtained. The structural equation modeling was used in order to test the research hypotheses.

Findings
– The results of this study show that SRS influences purchase intentions and behavior via RQ. In addition, SC moderate the effect of RQ on purchase intentions whereas RQ moderates the effect of purchase intentions on purchase behavior.

Practical implications
– From a managerial standpoint, this research provides implications for service recovery management. In particular, the findings indicate the importance of RQ. When a service failure occurs, RQ not only mediates the effect of SRS on purchase intentions, but also facilitates transforming behavioral intentions into actual behavior.

Originality/value
– This research fills a void in the service recovery literature by linking service recovery performance to the RQ-behavior chain.
Methodologies for monitoring website performance
Authors: Moral Paz , Gonzalez Pilar , Plaza Beatriz 
Published: July 2014

Purpose
– Online advertising such as Google AdWords gives small and medium-sized enterprises access to new markets at reduced costs. The purpose of this paper is to analyse the visibility and performance of a website and to test the effectiveness of online marketing using the data provided by Google Analytics.

Design/methodology/approach
– The authors use a class of econometric time series models with unobservable components, Structural Time Series Models (STSM). The authors allow for time-varying trends to take into account the non-stationary behaviour displayed by time series. The authors illustrate the model using daily data from a local tourist website. Three specific questions are addressed: do paid keywords campaigns increase the volume and quality of search traffic? Do paid keywords affect the volume and quality of the unpaid traffic? How do paid and unpaid keywords perform?

Findings
– The results for the case study show that: first, online campaigns affect traffic volume positively but their effectiveness on traffic quality is uncertain; second, paid keywords do not affect the volume and quality of unpaid traffic; third, the increase in traffic volume is not always due to the paid keywords and the lowest quality visits come from paid traffic.

Practical implications
– This analysis may help webmasters to design successful online advertising strategies.

Originality/value
– This study contributes to the development of user-friendly methodologies to monitor website performance. The analysis shows that STSM is a suitable methodology to test the effectiveness of online campaigns and to assess the changes over time in the performance of a website.
Fatigue behaviour of laser-sintered PA12 specimens under four-point rotating bending
Authors: Munguia Javier , Dalgarno Kenny 
Published: July 2014

Purpose
– The purpose of this paper was twofold: first, to determine if rotating bending could be used as an effective way of determining the fatigue behaviour of laser-sintered nylon, and second, to examine whether the fatigue behaviour of laser-sintered PA12 showed any significant anisotropy.

Design/methodology/approach
– Specimens were measured to obtain dimensional accuracy, density and surface roughness levels. Then, uniaxial tensile and rotating-bending fatigue tests were performed. A purpose-built test-jig has been used to subject hourglass-shaped specimens to reversed bending at two frequencies: 50 and 30 Hz. Additionally, thermal and microstructural analyses were performed to understand the underlying mechanisms of failure.

Findings
– The experiments suggest PA12 specimens will fail in fatigue following the conventional fatigue mechanisms observed in previous research with ductile polymers. Although high-frequency loading caused a heat build-up in the specimen, temperatures stabilised between 20 and 30°C, suggesting that rotating-bending fatigue at frequencies of up to 50 Hz is a valid way of determining the fatigue behaviour of laser-sintered PA12 specimens. Stresses below 20 MPa led to fatigue lives above 1 million cycles. Some anisotropic behaviour was observed in the fatigue test results, with specimens made orientated with the Z axis showing the lowest fatigue lives on average, but an endurance limit of approximately 15 MPa seems to be common for all specimens regardless of their build orientation.

Practical implications
– The observed endurance limit of 15 MPa did not depend significantly on the orientation at which a part was built – meaning that it may be possible to guarantee a service life for a part which does not depend on part orientation within a build. Clearly, good-quality control will also be required to ensure performance, but this has important implications for the design of laser-sintered PA12 parts for realistic service conditions.

Originality/value
– To our knowledge, this is the first paper to present rotating-bending fatigue data for laser-sintered PA12 parts, and the first to identify an endurance limit which is independent of part orientation.
Color-coded patient-specific physical models of congenital heart disease
Authors: Ejaz Fariha , Ryan Justin , Henriksen Megan , Stomski Lillee , Feith Megan , Osborn Michele , Pophal Stephen , Richardson Randy , Frakes David 
Published: July 2014

Purpose– The purpose of this study was to develop and apply new physical heart defect models (PHDMs) that are patient-specific and color-coded with an optimized map.Design/methodology/approach– Heart defect anatomies were segmented from medical images and reconstructed to form virtual models, which were then color-coded and rapid prototyped. The resulting PHDMs were used in a medical educational study to evaluate their pedagogical efficacy and in clinical case studies to investigate their utility in surgical planning.Findings– A growing library of 36 PHDMs (including the most common defects) was generated. Results from the educational study showed that the PHDMs enabled uniquely effective learning, and the clinical case studies indicated that the models added value as surgical planning aids.Research limitations/implications– The education study involved a limited number of students, so future work should consider a larger sample size. The clinical case studies favored use of the PHDMs in surgical planning, but provided only qualitative support.Practical implications– Workflow optimization is critical for PHDMs to be used effectively in surgical planning because some operations must be performed in emergently.Social implications– Because PHDMs have potential to influence surgeons’ actions as surgical planning aids, their use in that context must be thoroughly vetted.Originality/value– The proposed models represent the first PHDMs that are patient-specific and fully color-coded with a standardized map optimized for the human visual system. The models enhanced medical education and facilitated effective surgical planning in this study.
Economic crisis, sport success and willingness to pay: the case of a football club
Authors: Castellanos Garcia Pablo , García Villar Jaume , Manuel Sánchez Santos José 
Published: July 2014

Purpose– The purpose of this paper is to obtain evidence about the scope of the determinants of the willingness to pay (WTP) of the residents in a Spanish city (A Coruña) for keeping a professional football team (Deportivo) competing at the highest level. Apart from the individual socio-demographic characteristics of the respondents and their attitudes as football fans, the authors try to know the influence on the WTP of factors such as the general economic conditions and the plausibility of the team disappearance.Design/methodology/approach– The value of the intangible benefits associated with the team existence is derived from the application of the contingent valuation method (CVM), using two surveys conducted in 2003 and 2012, respectively, with the aim of obtaining information concerning citizens’ behaviour and attitudes towards a professional football team.Findings– The consumption of public goods generated by the local football team is relatively inelastic to the sport success and general economic situation, but the value assigned by residents to those goods depends on these factors. Of the two components of the WTP, the non-use value is especially sensitive to changes both in the Spanish economic conditions and in the quality of the public goods generated by the football team.Originality/value– This is the first study that applies the CVM to a football team controlling for both the general economic conditions and the team sport success and, as such, it provides interesting insights into the nature and scope of the determinants of individuals’ WTP in a CVM setting.
Lifetime prediction and design aspects of reliable lead-free non-collapsible BGA joints in LTCC packages for RF/microwave telecommunication applications
Authors: Putaala Jussi , Salmela Olli , Nousiainen Olli , Kangasvieri Tero , Vähäkangas Jouko , Uusimäki Antti , Lappalainen Jyrki 
Published: July 2014

Purpose
– The purpose of this paper is to describe the behavior of different lead-free solders (95.5Sn3.8Ag0.7Cu, i.e. SAC387 and Sn7In4.1Ag0.5Cu, i.e. SAC-In) in thermomechanically loaded non-collapsible ball grid array (BGA) joints of a low-temperature co-fired ceramic (LTCC) module. The validity of a modified Engelmaier’s model was tested to verify its capability to predict the characteristic lifetime of an LTCC module assembly implementable in field applications.

Design/methodology/approach
– Five printed wiring board (PWB) assemblies, each carrying eight LTCC modules, were fabricated and exposed to a temperature cycling test over a −40 to 125°C temperature range to determine the characteristic lifetimes of interconnections in the LTCC module/PWB assemblies. The failure mechanisms of the test assemblies were verified using scanning acoustic microscopy, scanning electron microscopy (SEM) and field emission SEM investigation. A stress-dependent Engelmaier’s model, adjusted for plastic-core solder ball (PCSB) BGA structures, was used to predict the characteristic lifetimes of the assemblies.

Findings
– Depending on the joint configuration, characteristic lifetimes of up to 1,920 cycles were achieved in the thermal cycling testing. The results showed that intergranular (creep) failures occurred primarily only in the joints containing Sn7In4.1Ag0.5Cu solder. Other primary failure mechanisms (mixed transgranular/intergranular, separation of the intermetallic compound/solder interface and cracking in the interface between the ceramic and metallization) were observed in the other joint configurations. The modified Engelmaier’s model was found to predict the lifetime of interconnections with good accuracy. The results confirmed the superiority of SAC-In solder over SAC in terms of reliability, and also proved that an air cavity structure of the module, which enhances its radio frequency (RF) performance, did not degrade the reliability of the second-level interconnections of the test assemblies.

Originality/value
– This paper shows the superiority of SAC-In solder over SAC387 solder in terms of reliability and verifies the applicability of the modified Engelmaier’s model as an accurate lifetime prediction method for PCSB BGA structures for the presented LTCC packages for RF/microwave telecommunication applications.
Influence of PTH offset angle in wave soldering with thermal-coupling method
Authors: Sharizal Abdul Aziz Mohd , Zulkifly Abdullah Mohd , Yee Khor Chu 
Published: July 2014

Purpose
– The aim of this study is to investigate the effects of offset angle in wave soldering by using thermal fluid structure interaction modeling with experimental validation.

Design/methodology/approach
– The authors used a thermal coupling approach that adopted mesh-based parallel code coupling interface between finite volume-and finite element-based software (ABAQUS). A 3D single pin-through-hole (PTH) connector with five offset angles (0 to 20°) on a printed circuit board (PCB) was built and meshed by using computational fluid dynamics preprocessing software called GAMBIT. An implicit volume of fluid technique with a second-order upwind scheme was also applied to track the flow front of solder material (Sn63Pb37) when passing through the solder pot during wave soldering. The structural solver and ABAQUS analyzed the temperature distribution, displacement and von Mises stress of the PTH connector. The predicted results were validated by the experimental solder profile.

Findings
– The simulation revealed that the PTH offset angle had a significant effect on the filling of molten solder through the PCB. The 0° angle yielded the best filling profile, filling time, lowest displacement and thermal stress. The simulation result was similar to the experimental result.

Practical implications
– This study provides a better understanding of the process control in wave soldering for PCB assembly.

Originality/value
– This study provides fundamental guidelines and references for the thermal coupling method to address reliability issues during wave soldering. It also enhances understanding of capillary flow and PTH joint issues to achieve high reliability in PCB assembly industries.
Thermal warpage analysis of PBGA mounted on PCB during reflow process by FEM and experimental measurement
Authors: Xia Weisheng , Xiao Ming , Chen Yihao , Wu Fengshun , Liu Zhe , Fu Hongzhi 
Published: July 2014

Purpose
– The purpose of this paper is to study the thermal warpage of a plastic ball grid array (PBGA) mounted on a printed circuit board (PCB) during the reflow process.

Design/methodology/approach
– A thermal-mechanical coupling method that used finite-element method software (ANSYS 13.1) was performed. Meanwhile, a shadow moiré apparatus (TherMoiré PS200) combined with a heating platform was used for the experimental measurement of the warpage of PBGA according to the JEDEC Standard.

Findings
– The authors found that the temperature profiles taken from the simulated results and experimental measurement are consistent with each other, only with a little and acceptable difference in the maximum temperatures. Furthermore, the maximum warpage measurements during the reflow process are 0.157 mm and 0.149 mm for simulation and experimental measurements, respectively, with a small 5.37 per cent difference. The experimental measurement and simulated results are well correlated. Based on the validated finite element model, two factors, namely, the thickness and dimension of PCB, are explored about their effect on the thermal warpage of PBGA mounted on PCB during the reflow process.

Practical implications
– The paper provides a thorough parametrical study of the thermal warpage of PBGA mounted on PCB during the reflow process.

Originality/value
– The findings in this paper illustrate methods of warpage study by combination of thermal-mechanical finite element simulation and experimental measurement, which can provide good guidelines of the PCB design in the perspective of thermal warpage during the reflow process.
Assessment of probiotic potential and anticancer activity of newly isolated vaginal bacterium Lactobacillus plantarum 5BL
Authors: Nami Yousef , Abdullah Norhafizah , Haghshenas Babak , Radiah Dayang , Rosli Rozita , Khosroushahi Ahmad Yari 
Published: July 2014

AbstractNumerous bacteria in and on its external parts protect the human body from harmful threats. This study aimed to investigate the potential beneficial effects of the vaginal ecosystem microbiota. A type of bacteria was isolated from vaginal secretions of adolescent and young adult women, cultured on an appropriate specific culture medium, and then molecularly identified through 16S rDNA gene sequencing. Results of 16S rDNA sequencing revealed that the isolate belongs to the Lactobacillus plantarum species. The isolated strain exhibited probiotic properties such as low pH and high bile salt concentration tolerance, antibiotic susceptibility and antimicrobial activity against some pathogenic bacteria. The anticancer effects of the strain on human cancer cell lines (cervical, HeLa; gastric, AGS; colon, HT‐29; breast, MCF‐7) and on a human normal cell line (human umbilical vein endothelial cells [HUVEC]) were investigated. Toxic side effects were assessed by studying apoptosis in the treated cells. The strain exhibited desirable probiotic properties and remarkable anticancer activity against the tested human cancer cell lines (P ≤ 0.05) with no significant cytotoxic effects on HUVEC normal cells (P ≤ 0.05). Overall, the isolated strain showed favorable potential as a bioactive therapeutic agent. Therefore, this strain should be subjected to the other required tests to prove its suitability for clinical therapeutic application.
Intake of dairy products and calcium and prevalence of depressive symptoms during pregnancy in Japan: a cross‐sectional study
Authors: Miyake Y , Tanaka K , Okubo H , Sasaki S , Arakawa M 
Published: July 2014

ObjectiveTo examine the relationship between the intake of dairy products and calcium and the prevalence of depressive symptoms during pregnancy.DesignCross‐sectional study.SettingKyushu Okinawa Maternal and Child Health Study (KOMCHS).SampleA cohort of 1745 pregnant Japanese women.MethodsDietary intake during the preceding month was assessed using a self‐administered diet history questionnaire. Scores of 16 or higher on the Center for Epidemiologic Studies Depression Scale denoted depressive symptoms. Adjustment was made for age, gestation, region of residence, number of children, family structure, history of depression, family history of depression, smoking, secondhand smoke exposure at home and at work, job type, household income, education, and body mass index. In our analyses regarding dairy products in general, adjustment was also made for fish intake; in our analysis regarding calcium, adjustment was also made for the intake of saturated fatty acids, eicosapentaenoic acid plus docosahexaenoic acid, and vitamin D.Main outcome measuresDepressive symptoms during pregnancy.ResultsHigher intake levels of yogurt and calcium were independently related to a lower prevalence of depressive symptoms during pregnancy: the adjusted odds ratios between extreme quartiles were 0.69 (95% CI 0.48–0.99, P for trend = 0.03) and 0.59 (95% CI 0.40–0.88, P for trend = 0.006), respectively. No relationships were observed between the intake of all dairy products, milk, or cheese and depressive symptoms during pregnancy.ConclusionsThe current results suggest that a higher intake of yogurt and calcium may be associated with a lower prevalence of depressive symptoms during pregnancy.
A reliable multiplex genotyping assay for HCV using a suspension bead array
Authors: Yang Yi‐Chen , Wang Der‐Yuan , Cheng Hwei‐Fang , Chuang Eric Y. , Tsai Mong‐Hsun 
Published: July 2014

SummaryThe genotyping of the hepatitis C virus (HCV) plays an important role in the treatment of HCV because genotype determination has recently been incorporated into the treatment guidelines for HCV infections. Most current genotyping methods are unable to detect mixed genotypes from two or more HCV infections. We therefore developed a multiplex genotyping assay to determine HCV genotypes using a bead array. Synthetic plasmids, genotype panels and standards were used to verify the target‐specific primer (TSP) design in the assay, and the results indicated that discrimination efforts using 10 TSPs in a single reaction were extremely successful. Thirty‐five specimens were then tested to evaluate the assay performance, and the results were highly consistent with those of direct sequencing, supporting the reliability of the assay. Moreover, the results from samples with mixed HCV genotypes revealed that the method is capable of detecting two different genotypes within a sample. Furthermore, the specificity evaluation results suggested that the assay could correctly identify HCV in HCV/human immunodeficiency virus (HIV) co‐infected patients. This genotyping platform enables the simultaneous detection and identification of more than one genotype in a same sample and is able to test 96 samples simultaneously. It could therefore provide a rapid, efficient and reliable method of determining HCV genotypes in the future.
Comparison of Short‐term Infusion Regimens of N‐Acetylcysteine Plus Intravenous Fluids, Sodium Bicarbonate Plus Intravenous Fluids, and Intravenous Fluids Alone for Prevention of Contrast‐induced Nephropathy in the Emergency Department
Authors: Kama Ahmet , Yılmaz Serkan , Yaka Elif , Dervişoğlu Erkan , Özgür Doğan Nurettin , Erimşah Emre , Pekdemir Murat 
Published: July 2014

AbstractBackgroundThere is no evidence regarding the several short‐term prophylaxis protocols for contrast‐induced nephropathy (CIN) that may be most feasibly convenient in emergency settings.ObjectivesThe purpose of this study was to compare the efficacies of short‐term CIN prophylaxis protocols of normal saline, N‐acetylcysteine (NAC) plus saline, and sodium bicarbonate plus saline in emergency department (ED) patients at moderate or high risk of CIN after receiving intravenous (IV) contrast agent.MethodsThis single‐center, randomized, nonblinded clinical trial was conducted in the ED with adult patients requiring contrast‐enhanced computed tomography (CT). Patients with moderate to high risk of CIN according to the Mehran risk score, who consented to participate, were eligible. Patients with continuous renal replacement therapy or who reported contrast allergy were excluded. Enrolled patients were randomly assigned to receive 150 mg/kg NAC in 1000 mL of 0.9% sodium chloride (NaCl), 150 mEq of sodium bicarbonate in 1000 mL of 0.9% NaCl, or 1000 mL of IV saline infusion, all given at 350 mL/hr for 3 hours. All of the patients were administered less than 100 mL of nonionic, low‐osmolality contrast agent. The primary outcome of CIN was defined as a 25% increase or a greater than 0.5 mg/dL increase in the serum creatinine level 48 to 72 hours later compared with the baseline measurement.ResultsA total of 107 patients were randomized to NAC (n = 36), sodium bicarbonate (n = 36), and saline prophylaxis (n = 35). The mean age of the patients was 71 years (95% confidence interval [CI] = 65 to 77 years), and 58 (54.2%) were male. The groups were similar regarding baseline characteristics and nephropathy risks. Of the 16 (14.9%) patients who eventually developed CIN, seven (19.4%) were in the NAC plus saline group, four (11.1%) were in the sodium bicarbonate plus saline group, and five (14.2%) were in the saline group. There were no significant differences between the groups in terms of the prevention of CIN (p = 0.60).ConclusionsNone of the short‐term protocols with normal saline, NAC, or sodium bicarbonate was superior in ED patients requiring contrast‐enhanced CT who had a moderate or high risk of CIN.
A new market for an old food: the U.S. demand for olive oil
Authors: Xiong Bo , Sumner Daniel , Matthews William 
Published: July 2014

AbstractWhile U.S. consumption of olive oil has tripled over the past two decades, nearly all olive oil continues to be imported. Estimation of a demand system using monthly import data reveals that the income elasticity for virgin oils sourced from EU is above one, but demand for nonvirgin oils is income‐inelastic. The demand for olive oil as a single product is price‐inelastic. Differentiated by product characteristic and origin, olive oils are highly substitutable with each other but not with other vegetable oils. News about the health and culinary benefits of olive oil and the spread of Mediterranean diet contribute significantly to the rising demand.