bluuebunny/crossref_metadata_2025_split huggingface dataset:
Short range rocket-target: research, development and implementation
Authors: Fedaravičius Algimantas , Kilikevičius Sigitas , Survila Arvydas , Račkauskas Saulius 
Published: February 2019

Purpose
The purpose of this paper is to present the aerodynamic analysis and external ballistics modeling used in the development of a rocket-target for short range air defence missile systems.

Design/methodology/approach
A computational fluid dynamics (CFD) analysis of the airflow around the rocket-target was carried out to estimate the drag, which was needed to develop a mathematical model for external ballistics of the rocket-target. Field-experimental testing was conducted to compare the model results to the data obtained experimentally using various additional measurement techniques such as global positioning system (GPS) coordinates marking of the crash and launch sites, air defence surveillance radar tracking and installing equipment for telemetric data capturing and transmission.

Findings
Various ballistic parameters such as the velocity and trajectory of the rocket-target were obtained taking into account the CFD analysis results and internal ballistics data. The field-experimental testing showed a good agreement between the model results and the results obtained by the experimental techniques.

Practical implications
The presented computational models and the experimental techniques could be used in future developments of similar aircraft.

Originality/value
This paper presents a research approach for developing a rocket-target. The results of the research were used as a basis for developing a rocket-target for short range air defence rocket systems. The developed rocket-target was successfully implemented in practice.
Convergence to IFRS, accounting quality, and the role of regional institutions: evidence from China
Authors: Hao Jun , Sun Minghe , Yin Jennifer 
Published: February 2019

PurposeThe purpose of this paper is to examine the relationship between regional institution and accounting quality.Design/methodology/approachThis study investigates whether and to what extent the convergence to International Financial Reporting Standards (IFRS) improves Chinese firms’ accounting quality. It also examines the role regional institutions play in this process. The focus is on two aspects of accounting quality: the accrual aggressiveness and the timely loss recognition. Specifically, the study tests: whether the convergence to IFRS significantly lowers the accrual aggressiveness proxied by the magnitude of discretionary accruals (DA); whether the convergence to IFRS significantly enhances the timely loss recognition proxied by the likelihood of reporting large negative net income; and whether the effects of convergence to IFRS on accounting quality vary with the quality of regional institutions.FindingsThe findings show that convergence to IFRS generally was accompanied by increases in DA and decreases in timely loss recognition for Chinese firms. Further analysis on the development of regional institutions reveals that both changes in accrual aggressiveness and timely loss recognition are more pronounced for firms located in regions with a lower level of development in the legal environment.Originality/valueThis study contributes to the accounting literature in several ways. First, it extends the accounting literature regarding institutional factors by examining the association between regional institutions and accounting quality. Second, by adopting a within-country setting, the study avoids such problems of cross-country comparisons as confounding factors caused by country-specific accounting rules and regulations, differences in infrastructure and culture, and other potential endogeneity problems (Chanet al., 2010). Third, the attention paid to the European and US application of IFRS overshadows the application and effects of IFRS in emerging markets. By examining China, the world largest emerging economy in the process of economic transition, this study sheds light on the effect of convergence to IFRS on accounting quality for emerging or transitional economies.
Advances on high current load effects on lead-free solder joints of SMD chip-size components and BGAs
Authors: Straubinger Dániel , Géczy Attila , Sipos András , Kiss András , Gyarmati Dániel , Krammer Oliver , Rigler Dániel , Bušek David , Harsányi Gábor 
Published: February 2019

Purpose
This paper aims to present a novel approach on investigating critical current densities in the solder joints of chip-size surface-mounted components or device (SMD) components and ball grid array (BGA) lead-free solder joints with the focus of via-in-pad geometries. The investigation involves a numerical approach and a physical validation with selected geometry configurations and high current loads to reveal possible failure sources. The work is a continuation of a previous study.

Design/methodology/approach
Current density was investigated using finite element modeling on BGA joints. Dummy BGA components, 0402 and 0603 zero ohm jumper resistors, were used, both in daisy chain setups on standard FR4 printed circuit boards (PCBs). Respective physical loading experiments were set to find effects of elevated current density at hot zones of the joints. Cross-section analysis, scanning electron microscopy and shear force tests were used to analyze the joints.

Findings
The findings reveal alterations in the joints, while the current loading is not directly affecting the structure. The modeling reveals the current density map in the selected formations with increased current crowding zones. Overall, the degradation does not reach the level of electromigration (EM)-induced voiding due to the limiting factor of the FR4 substrate.

Practical implications
The heavy current load affects joint reliability, but there are limitations of EM-induced failures on PCB-based assemblies due to the thermomechanical weakness of the FR4 material.

Originality/value
The experiments investigate current density from a novel aspect on frequently used BGA surface mounted components with modeling configurations focusing on possible effects of via-in-pad structure.
Multidimensional appropriate clustering and DBSCAN for SAT solving
Authors: Hireche Celia , Drias Habiba 
Published: February 2019

Purpose
This paper is an extended version of Hireche and Drias (2018) presented at the WORLD-CIST’18 conference. The major contribution, in this work, is defined in two phases. First of all, the use of data mining technologies and especially the tools of data preprocessing for instances of hard and complex problems prior to their resolution. The authors focus on clustering the instance aiming at reducing its complexity. The second phase is to solve the instance using the knowledge acquired in the first step and problem-solving methods. The paper aims to discuss these issues.

Design/methodology/approach
Because different clustering techniques may offer different results for a data set, a prior knowledge on data helps to determine the adequate type of clustering that should be applied. The first part of this work deals with a study on data descriptive characteristics in order to better understand the data. The dispersion and distribution of the variables in the problem instances is especially explored to determine the most suitable clustering technique to apply.

Findings
Several experiments were performed on different kinds of instances and different kinds of data distribution. The obtained results show the importance and the efficiency of the proposed appropriate preprocessing approaches prior to problem solving.

Practical implications
The proposed approach is developed, in this paper, on the Boolean satisfiability problem because of its well-recognised importance, with the aim of complexity reduction which allows an easier resolution of the later problem and particularly an important time saving.

Originality/value
State of the art of problem solving describes plenty of algorithms and solvers of hard problems that are still a challenge because of their complexity. The originality of this work lies on the investigation of appropriate preprocessing techniques to tackle and overcome this complexity prior to the resolution which becomes easier with an important time saving.
Fostering brand engagement and value-laden trusted B2B relationships through digital content marketing
Authors: Taiminen Kimmo , Ranaweera Chatura 
Published: February 2019

Purpose
The purpose of this paper is to explore how digital content marketing (DCM) users can be engaged with business-to-business (B2B) brands and determine how such engagement leads to value-laden trusted brand relationships.

Design/methodology/approach
Through an online survey, data were collected from the email marketing list of a large B2B brand, and the hypothesised research model was analysed using covariance-based structural equation modelling.

Findings
This paper identifies a bundle of helpful brand actions – providing relevant topics and ideas; approaching content with a problem solving orientation; as well as investing in efforts to interpret, analyse and explain topics through DCM – to foster relationship value perceptions and brand trust. Critically however, cognitive-emotional brand engagement is shown to be a necessary requirement for converting these actions into relationship value perceptions.

Research limitations/implications
This paper furthers the understanding of the dual role of helpful brand actions in functionally oriented DCM. Additionally, this paper offers evidence of the central role of cognitive-emotional brand engagement in influencing value-laden customer–brand relationships.

Practical implications
This paper introduces a bundle of helpful brand actions that forms the basis for the dual roles of a brand in enhancing customer value and in fostering brand engagement and building relationships. This approach helps practitioners to steer brand-related perceptions arising from DCM interactions towards building trusted brand relationships.

Originality/value
This paper contributes to the marketing literature by revealing a potential approach to DCM in managing customer relationships. Instead of focusing solely on the content benefit-usage link to support engagement, this paper reveals the potential of helpfulness as a brand-initiated DCM engagement trigger in engaging customers with the brand, vis-à-vis the content.
Do we see the same? Discrepant perception of diversity and diversity management within a company
Authors: Bacouel-Jentjens Sabine , Yang Inju 
Published: February 2019

PurposeThe purpose of this paper is to paper investigates whether different perceptions exist with regard to diversity management within an organisation. Additionally, if such differences exist, what contextual factors influence these perceptions?Design/methodology/approachThe approach of this study is based on inductive and interpretative case research, which aims to compare diverse perceptions in two different organisational units of a company. For this purpose, 30 semi-structured interviews were conducted.FindingsThe findings in this paper highlight the importance of contexts in the study of diversity management. That is, contexts such as workforce composition and power (e.g. organisational status) in an organisation as well as the social environment’s impact on social identity processes, which results in discrepant focusses on and recognition of diversity management within the same organisation.Research limitations/implicationsThis study contributes to research on a more nuanced approach to diversity by proposing an importance of contexts for the process of social identity and further perceptual discrepancy.Practical implicationsQualitative research on and findings about perceptual discrepancy help to close the gap between the practice and rhetoric of diversity management.Originality/valueDeparting from extant empirical research on diversity at the workplace, which relies predominantly on quantitative methods, a qualitative design of this study allows a refinement of previous findings. Also, this paper provides deeper insight into the sense-making process, resulting in different diversity perceptions by different employees according to their work and social environments or contexts.
The effectiveness of problem-based learning in technical and vocational education in Malaysia
Authors: Jabarullah Noor H. , Iqbal Hussain Hafezali 
Published: February 2019

PurposeThe purpose of this paper is to examine the impact of the use of problem-based learning (PBL) with engineering students at a technical university in Malaysia.Design/methodology/approachThe setting provided a unique opportunity to evaluate the impact of PBL, since Universiti Kuala Lumpur offers both the traditional, predominantly classroom-focussed approach to engineering and the more hands-on approach referred to as Higher Technical and Vocational Education and Training (HTVET). The study sample consisted of 453 third-year students’ enroled in both programmes at Universiti Kuala Lumpur.FindingsStudents in the HTVET programme responded better to PBL teaching methods, as evidenced by improved performance on written as well as lab-based assessments. This result indicates that students using the hands-on approach advocated by HTVET tend to obtain the greatest benefit from experiential, student-centred learning approaches. The analysis suggests the possibility that the PBL approach is a moderator of student performance in HTVET programmes. This possibility merits further investigation.Research limitations/implicationsThe sample included students from only one institution of higher learning, which was chosen because both types of programmes are offered there. In addition, the current study does not consider potential mediating or moderating variables.Originality/valueThe findings provide an empirical basis for implementing PBL as a form of experiential learning at higher education institutions, especially those using the HTVET model. Furthermore, they provide a justification for designing curriculum structures and student learning time with an emphasis on active and experiential learning, thereby maximising the effectiveness of a hands-on approach, rather than the “minds-on” theoretical approach advocated by traditional engineering programmes in enhancing the teaching and learning experience.
Do wages and job satisfaction really depend on educational mismatch? Evidence from an international sample of master graduates
Authors: Naguib Costanza , Baruffini Moreno , Maggi Rico 
Published: February 2019

Purpose
The purpose of this paper is to find econometric evidence of a negative influence of educational mismatch on either wage or job satisfaction, once potential sources of bias are adequately considered. The analysis attempts to answer the question: do wage or job satisfaction really depends on educational mismatch?

Design/methodology/approach
The paper uses a panel data of 1690 early career Master graduates from Università della Svizzera italiana (USI), Switzerland. First, a wage equation with dummies representing educational mismatch and other control variables is estimated. On the other hand, a regression in which the dependent variable is the degree of self-assessed job satisfaction is run in order to identify the effect of mismatch on job satisfaction.

Findings
The analysis finds no robust econometric evidence of a negative influence of educational mismatch on either wage or job satisfaction, once potential sources of bias are adequately considered.

Research limitations/implications
The estimates have been conducted on a specific sub-population, i.e. a limited sample of Master graduates from a single Swiss university in the years 2006–2016; it is then not straightforward that results can be generalised to the whole population.

Originality/value
The influence of educational mismatch on job satisfaction has been extensively studied in the previous literature; however, most of the existing studies are likely to report biased results due to unobserved heterogeneity and measurement error. The authors address these two serious econometric issues by proposing a new instrumental variable for a self-assessed mismatch, i.e. time spent in job search after graduation.
Federal Judge Ideology: A New Measure of Ex Ante Litigation Risk
Authors: HUANG ALLEN , HUI KAI WAI , LI REEYARN ZHIYANG 
Published: February 2019

ABSTRACTDrawing on the political theory of judicial decision making, our paper proposes a new and parsimonious ex ante litigation risk measure: federal judge ideology. We find that judge ideology complements existing measures of litigation risk based on industry membership and firm characteristics. Firms in liberal circuits (the third quartile in ideology) are 33.5% more likely to be sued in securities class action lawsuits than those in conservative circuits (the first quartile in ideology). This result is stronger after the U.S. Supreme Court's ruling in the Tellabs case. We next show that the effect of judge ideology on litigation risk is greater for firms with more sophisticated shareholders and with higher expected litigation costs. Furthermore, judicial appointments affect litigation risk and the value of firms in the circuit, highlighting the economic consequences of political appointments of judges. Finally, using our new measure, we document that litigation risk deters managers from providing long‐term earnings guidance, a result that existing measures of litigation risk cannot show.
Obstructive sleep apnea and electrocardiographic P‐wave morphology
Authors: Corotto Paul S. , Kang Hyojung , Massaro Brianna , Harding William C. , Shah Neil R. , Gadi Sneha , Bilchick Kenneth , Mazimba Sula , Kwon Younghoon 
Published: February 2019

AbstractIntroductionObstructive sleep apnea (OSA) is a highly prevalent sleep disorder with important cardiovascular implications. Left atrial abnormality can be identified by electrocardiographic P‐wave morphology and is considered an important risk for atrial fibrillation (AF) and stroke, both of which have been associated with OSA. We hypothesized that severity of OSA would be associated with more abnormal electrocardiographic P‐wave morphology as indicated by P‐wave terminal force in V1 (PTFV1) and P‐wave area in V1 (PWAV1).MethodsPatients who underwent clinically indicated polysomnography and had 12‐lead ECG were identified through medical record review. Logistic regression was used to determine the associations between the measures of OSA severity (apnea hypopnea index [AHI] and mean nocturnal oxygen [O2] saturation) and abnormal PTFV1 and PWAV1 (defined by >75% percentile value of the studied cohort) adjusting for age, sex, body mass index, and hypertension.ResultsA total of 261 patients (mean age: 57 years old, male: 52%) were included in the study. Multivariate analysis showed that AHI was associated with abnormal PTFV1 (>7,280 µV ms) and PWAV1 (>1,000 µV ms; OR: 1.5; 95% CI [1.1, 2.0], p = 0.008; OR: 1.5 [1.1, 2.1], p = 0.005 per 1 SD increase in AHI, respectively). Mean O2 saturation was associated with abnormal PWAV1 (OR: 0.72 [0.54, 0.98], p = 0.03). Results remained unchanged after excluding patients taking AV nodal blocking agents.ConclusionIn a sleep clinic cohort, there was significant association between OSA severity and ECG‐defined left atrial abnormality.
Rapid identification of Candida sp. by MALDI‐TOF mass spectrometry subsequent to short‐term incubation on a solid medium
Authors: Bellanger Anne‐Pauline , Gbaguidi‐Haore Houssein , Liapis Eleni , Scherer Emeline , Millon Laurence 
Published: February 2019

Rapid identification of Candida species is important for appropriate antifungal therapy of fungemia. The matrix‐assisted laser desorption/ionization time‐of‐flight mass spectrometry (MALDI‐TOF MS) system is a useful tool to identify bacteria and yeasts. In this study, we evaluated the feasibility of identifying yeasts after a short‐term incubation on a solid medium. We tested 24 strains of eight Candida species. Blood culture bottles were spiked with a calibrated suspension of each Candida strain. Three different culture media, two types of blood culture bottles and three different incubation time points were tested. A multivariable random‐effects logistic regression analysis was performed for determining factors independently associated with a successful MALDI‐TOF MS identification. One‐hundred and thirty‐one out of 432 MALDI‐TOF MS analyses (30%) exhibited a score ≥ 1.7. The performance of the technique varied across Candida species. Factors associated with a successful identification were the use of a chromogenic Candida medium and the time points 4 and 5 h. Using the factors ‘chromogenic Candida medium’ and time point 5 h the global performance of identification reached 60% and a mean MALDI‐TOF score of 1.78. Identifying yeasts after a short‐term incubation on a solid medium seems possible, especially when using a chromogenic Candida medium and respecting at least 5 h of incubation. This assay was a first step and needs to be completed using more strains, various chromogenic Candida medium and maybe also testing a longer culture time such as 6 h.
Clinoform architecture and along‐strike facies variability through an exhumed erosional to accretionary basin margin transition
Authors: Poyatos‐Moré Miquel , Jones George D. , Brunt Rufus L. , Tek Daniel E. , Hodgson David M. , Flint Stephen S. 
Published: February 2019

AbstractExhumed basin margin‐scale clinothems provide important archives for understanding process interactions and reconstructing the physiography of sedimentary basins. However, studies of coeval shelf through slope to basin‐floor deposits are rarely documented, mainly due to outcrop or subsurface dataset limitations. Unit G from the Laingsburg depocentre (Karoo Basin, South Africa) is a rare example of a complete basin margin scale clinothem (>60 km long, 200 m‐high), with >10 km of depositional strike control, which allows a quasi‐3D study of a preserved shelf‐slope‐basin floor transition over a ca. 1,200 km2 area. Sand‐prone, wave‐influenced topset deposits close to the shelf‐edge rollover zone can be physically mapped down dip for ca. 10 km as they thicken and transition into heterolithic foreset/slope deposits. These deposits progressively fine and thin over tens of km farther down dip into sand‐starved bottomset/basin‐floor deposits. Only a few km along strike, the coeval foreset/slope deposits are bypass‐dominated with incisional features interpreted as minor slope conduits/gullies. The margin here is steeper, more channelized and records a stepped profile with evidence of sand‐filled intraslope topography, a preserved base‐of‐slope transition zone and sand‐rich bottomset/basin‐floor deposits. Unit G is interpreted as part of a composite depositional sequence that records a change in basin margin style from an underlying incised slope with large sand‐rich basin‐floor fans to an overlying accretion‐dominated shelf with limited sand supply to the slope and basin floor. The change in margin style is accompanied with decreased clinoform height/slope and increased shelf width. This is interpreted to reflect a transition in subsidence style from regional sag, driven by dynamic topography/inherited basement configuration, to early foreland basin flexural loading. Results of this study caution against reconstructing basin margin successions from partial datasets without accounting for temporal and spatial physiographic changes, with potential implications on predictive basin evolution models.