bluuebunny/crossref_metadata_2025 huggingface dataset:
High-quality relationships as antecedents of OCB: roles of identity freedom and gender
Authors: Singh Barjinder , Selvarajan T.T. , Chapa Olga
Published: June 2019

Purpose

The purpose of this paper is to expand the criterion domain of organizational citizenship behaviors (OCBs), by examining the relationship between high-quality relationships (HQRs) and OCBs, with identity freedom as a mediator. In addition, the study also tries to highlight the role of gender as a moderator, whereby female (vs male) employees deferentially evaluate the importance of HQRs while engaging in OCBs.

Design/methodology/approach

The authors conducted survey research by collecting data from 160 working adults and performed both basic mediation and mediated-moderated regression analysis with bootstrapping to determine the authors’ findings.

Findings

Results of the study establish HQRs as important antecedents of employee citizenship behaviors, clarify the role of identity freedom as an important underlying psychological mechanism that mediates the relationship between HQRs and OCBs and position gender as an important boundary condition in the relationship between HQR and identity freedom, whereby female employees are more likely to enjoy identity freedom in the presence of HQRs, as opposed to males.

Research limitations/implications

The present study illustrates the importance of HQRs and identity freedom as precursors of OCBs and in doing so expands the nomological net of OCBs, especially with respect to the antecedents of OCBs. The study also expands the scope of social identity theory by highlighting, in addition to social identity, the importance of identity expression.

Practical implications

This study provides guidance to organizational practitioners to focus on building HQRs at work as HQRs, by making employees feel safe, pave the way for OCBs. In addition, the study also highlights the importance of gender as a moderator, whereby employees with different gender affiliations react differently to organizational contexts.

Originality/value

Very little research has examined the relationship between HQRs and OCB. Antecedents of OCBs have been grouped into four categories: individual (or employee) characteristics, task characteristics, organizational characteristics and leadership behaviors. Clearly, the role played by the quality of interpersonal relationships in fostering OCBs has not been fully examined. By highlighting HQRs and identity freedom as antecedents of OCBs, the study informs the OCB literature by introducing interpersonal-relational and attitudinal elements as criterions of OCBs.
Muriel Pyrah: sources and myths from a West Riding of Yorkshire school, 1967–1972
Authors: Hoare Lottie
Published: June 2019

Purpose

The purpose of this paper is to juxtapose different sources concerning educational experiments embarked on by an English primary school teacher, Muriel Pyrah. Pyrah taught at Airedale School, Castleford, Yorkshire, UK, from the 1950s until 1972. Her approach was celebrated in the fields of oracy and arts education in the final years of her working life. Airedale was a Local Education Authority (LEA) school within the West Riding of Yorkshire, an LEA led by Alec Clegg, from 1945 to 1974.

Design/methodology/approach

Using film footage, sound recordings, artwork and topic books produced by her pupils, the paper entangles these archival sources with recent interviews from Pyrah’s former pupils and a former school inspector (HMI). Pyrah’s actual name has been used, as has that of the HMI. The names of pupils who contributed insights are anonymised.

Findings

The former pupils provide accounts that encourage a move away from a revisiting of progressivism that is predominantly anchored in studying the intentions and hopes of high profile educationalists postwar.

Research limitations/implications

The number of former pupils willing to discuss their memories was small, so no claims are made that their perspectives represent the dominant views of former pupils. However, these interviews reveal details that are absent in the other surviving archival sources.

Originality/value

The paper lays the foundation for further research on the voices of former pupils, inviting a focus on the way those participants reflect on the long-term impact of being involved in an educational experiment. Thus far, the representation of Pyrah’s pedagogy has been choreographed in print to build the legacy of the LEA. The pupils’ stories resonate differently.
Numerical study of plume emission from an elevated line source in a wall-bounded flow
Authors: Noormohammadi Asghar , Wang Bing-Chen
Published: June 2019

Purpose

This paper aims to study turbulent dispersion of a passive plume emitting from a single elevated line source of different elevations in a plane channel flow by using direct numerical simulation (DNS).

Design/methodology/approach

The investigation was conducted in both physical and spectral spaces, which includes an analysis of statistical moments and pre-multiplied spectra of the velocity and concentration fields. The pre-multiplied power spectra of the velocity and concentration fields are compared to identify the transition of the plume development from the turbulent convective stage to the turbulent diffusive stage.

Findings

It is observed that due to the presence of wall shear, the mean plume drifts toward the wall for the near-wall source release case. It is also observed that streamwise development of the plume is sensitive to both the source elevation and the downstream distance from the source. For the line source placed near the center of the channel, the plume development is dominated by the bulk meandering effects. However, for the plume emitting from the near-wall line source, it hits the ground soon after its release and becomes dominated by the wall shear. As the downstream distance from the line source increases, the streamwise development of the plume released from the near-wall line source transitions from a turbulent convective stage to a turbulent diffusive stage.

Originality/value

This paper represents an original DNS study of turbulent mixing and dispersion of a passive plume emitting from a line source of different elevations in a wall-bounded flow. This paper proposes a practical method to identify the transition of the plume development from the turbulent convective to the turbulent diffusive stages.
Lattice Boltzmann method to simulate convection heat transfer in a microchannel under heat flux
Authors: Mozaffari Masoud , D’Orazio Annunziata , Karimipour Arash , Abdollahi Ali , Safaei Mohammad Reza
Published: June 2019

Purpose

The purpose of this paper is to improve the lattice Boltzmann method’s ability to simulate a microflow under constant heat flux.

Design/methodology/approach

Develop the thermal lattice Boltzmann method based on double population of hydrodynamic and thermal distribution functions.

Findings

The buoyancy forces, caused by gravity, can change the hydrodynamic properties of the flow. As a result, the gravity term was included in the Boltzmann equation as an external force, and the equations were rewritten under new conditions.

Originality/value

To the best of the authors’ knowledge, the current study is the first attempt to investigate mixed-convection heat transfer in an inclined microchannel in a slip flow regime.
An empirical approach to understanding the lower-middle and upper-middle income traps
Authors: Kabir M. Adnan , Ahmed Ashraf
Published: June 2019

Purpose

The purpose of this paper is to investigate the factors that are significant in contributing to the per capita income growth of countries that are experiencing or have experienced the lower-middle and upper-middle income traps.

Design/methodology/approach

The study comprises 85 countries over the period 1960 to 2017 spanning across three income groups: lower-middle, upper-middle and high. A panel data structure was used to run a fixed effect and random effect estimation on three models of income groups. The Hausman specification test, which was used for further statistical fitness, confirmed the appropriateness of fixed effect over the random in explaining the estimation of factor variables.

Findings

The results show that unemployment is a pervasive problem that negatively affect countries at all income levels. Foreign direct investment and population of dependents are associated with economic progression of countries that have experienced or are experiencing the lower-middle income trap. Furthermore, rising income inequality and foreign aid assistance are detrimental to countries that have experienced or are experiencing the upper-middle income trap. Moreover, income inequality, disproportionate urban population and rising dependent population are damaging for high income countries that never experienced any of the middle-income traps. Conversely, openness to trade, inflation and exchange rate volatility had limited capacity in explaining growth dynamics.

Research limitations/implications

This study could not incorporate geopolitical, demographic, geographical and other such exogenous factors, which could have episodes of influences on the economic development of countries. These were outside the study's realm of quantitative analysis.

Originality/value

This paper contributes to existing literature by providing an empirical cross-sectional comparative analysis of countries belonging to different income groups. The prevailing literature lacks such a cross-tabulated presentation of factors affecting countries that avoided the middle income trap and those that could not.
Dimensions of knowledge governance in a multi-PMO project context
Authors: Martinez Sanz Maria Mercedes , Ortiz-Marcos Isabel
Published: June 2019

Purpose

Knowledge is recognized to be a key asset to achieve the strategic objectives of an organization. To that end, it is necessary to count on governance mechanisms that ensure the alignment between the knowledge resources and processes and the business strategy. Given that knowledge management is often performed by project management offices (PMOs), the purpose of this paper is to explore if the dimensions for PMOs governance suggested in the literature are also valid for knowledge governance and what problems do exist.

Design/methodology/approach

This research has been done using case study methodology. A large complex project in the IT industry was deeply analyzed. This project brings together most of the elements that can be found in current organizational contexts (e.g. geographical dispersed project teams, multicultural environment, technical complexity, etc.), thus reinforcing the applicability of the results obtained.

Findings

The study findings indicate that knowledge flows between PMOs take place along the dimensions defined for PMO governance, thus confirming the suitability of those dimensions also for the governance of knowledge. This research also validates the connection between the barriers to knowledge sharing and the knowledge governance mechanisms, and provides empirical evidence of the importance of informal knowledge governance to foster knowledge sharing behaviors. This is of key importance to overcome daily operational issues. The observations made are, in fact, valuable lessons learnt for future projects and a valuable input for further research.

Originality/value

This study explores the similarities between PMOs governance and knowledge governance in multi-PMO settings on the basis of a case study, thus contributing additional empirical data to the literature. Previous work with this approach has not been found.
Patients’ intent to revisit with trust as the mediating role: lessons from Penang Malaysia
Authors: Mohd Isa Salmi , Lim Grace Sze Sze , Chin Phaik Nie
Published: June 2019

Purpose

This study aims to examine hospital image, perceived medical quality, relationship marketing and word-of-mouth as the determinants of patients’ intent to revisit private hospitals in Penang, based on the theory of planned behaviour.

Design/methodology/approach

A quantitative study comprising a self-administered questionnaire was distributed to domestic and international patients at the airport, private hospitals and hotels located in Penang. The partial least squares structural equation modelling (PLS-SEM) approach was used to analyse and test the research hypotheses.

Findings

The results show that cognitive components (i.e. hospital image and perceived medical quality) do not have any significant influence on patients’ intent to revisit, while affective components (i.e. relationship marketing) and behavioural components (i.e. word-of-mouth) are important in increasing patients’ intent to revisit private hospitals in Penang, Malaysia. Trust has no significant mediating effect between predictor variables and patients’ intent to revisit, but it has significant association with affective and behavioural components.

Practical implications

The findings provide insights to medical marketing teams in promoting and increasing patients’ intent to revisit their respective hospitals and for the governments to sustain and enhance medical tourism in their countries.

Originality/value

This study is one of the few studies that looks at the relationship between hospital image, perceived medical quality, relationship marketing, word-of-mouth and patients’ intent to revisit private hospitals in Penang, Malaysia. This study also explored the direct and indirect effects of trust on patients’ intent to revisit that was still limited.
Optimization of process parameters of wire electro discharge machining for Ti49.4Ni50.6 shape memory alloys using the Taguchi technique
Authors: Takale Adik , Chougule Nagesh
Published: June 2019

Purpose

Ti49.4Ni50.6 (at. %) shape memory alloy (SMA) is a unique class of smart materials because of unbeatable property which given a wide variety of their applications across a broad range of fields including an orthopedic implant. It plays a very important role in the constructions of novel orthopedic implants application (like dynamic compression plate) because of lower Young’s modulus compared to other biomedical implant materials, high mechanical strength, excellent corrosion resistance and unique property like shape memory effect. Conventional machining of Ti-Ni yields poor surface finish and low dimensional accuracy of the machined components. Hence, wire electro-discharge machining (WDEM) of Ti-Ni has been performed. The purpose of this paper is to investigate the effect of variation of five process parameters, namely, a pulse-on time, pulse-off time, spark gap set voltage (SV), wire feed and wire tension on the material removal rate, surface roughness (SR), kerf width (KW) and dimensional deviation (DD), in the WDEM of Ti49.5Ni50.6 SMA.

Design/methodology/approach

The effect of machining parameters on Ti49.4Ni50.6 has been fully explored using WEDM with zinc coated brass wire as an electrode. In this work, L18 orthogonal array based on Taguchi method has been used to conduct a series of experiments and statically evaluate the experimental data by the use of the method of analysis of variance. Scanning electron microscope images of the machined surface, at the highest and lowest pulse-on time, have been taken to evaluate the quality of surface in terms of their SR values.

Findings

For the highest pulse-on time, it is observed that blow holes, cracks, melted droplets and craters have been formed on the machined surface with an SR of 2.744 µm, while for the lowest pulse-on time, these are not formed with an SR of 0.862 µm. It is seen that the pulse-on time is the most significant process parameter for MRR, SR and KW, while the DD is significantly affected by spark gap SV. The optimal values of the process parameters have been obtained by the method of analysis of mean and the confirmatory experiments have been carried out to validate results of optimization. Energy dispersive spectroscopy analysis of the machined surface of Ti49.4Ni50.6 has shown a certain amount of deposition of material on the machined surface.

Originality/value

This is an original paper.
Preferential analysis of street food amongst the foreign tourists: a case of Delhi region
Authors: Gupta Vikas , Khanna Kavita , Gupta Raj Kumar
Published: June 2019

Purpose

The purpose of this paper is to evaluate and analyse the street food preferences of foreign tourists in Delhi. It will also try to find out the reasons for the selection of these foods by the tourists.

Design/methodology/approach

The data collection was done from 670 foreign tourists at the departure gates of Indira Gandhi International Airport, New Delhi. This study involved location intercept technique through face-to-face interviews and filling of structured questionnaire for taking the responses. The street food preference of the tourists is analysed using analytical hierarchy process model.

Findings

This study identified 17 street foods which were amongst the most preferred by the foreign tourist, with chicken tikka being the most favoured and paddu being least preferred. It was also found that tourists usually prefer street foods which are mild in taste and are hygienically prepared.

Practical implications

This study suggests that Indian street food presents a huge market for the foreign tourists that needs to be nurtured. It will help the stakeholders in the street food businesses in Delhi to devise strategies to promote food tourism, modify and align tourism products, enhance farming techniques and ultimately improve the destination image and branding of the place.

Originality/value

This is the first attempt to try to explore tourists’ street food preference and will help in maximising the influx of foreign tourists, as the concept of culinary tourism is on rise in India.
Distribution planning using capacitated clustering and vehicle routing problem
Authors: Rautela Anubha , Sharma S.K. , Bhardwaj P.
Published: June 2019

Purpose

The purpose of this paper is to reduce the distribution cost of an Indian cooperative dairy. The reduction of cost was achieved with the application of the clustering method (k-means clustering) and capacitated vehicle routing problem (cheapest link algorithm (CLA)).

Design/methodology/approach

Capacitated k-means clustering was used to split delivery locations into similar size groups (i.e. clusters) based on proximity without exceeding a specified total cluster capacity. Each cluster would be served by a local stockist. CLA was then used to find delivery routes from dairy (i.e. depot) to stockist in each cluster and from stockist to all other delivery locations within the cluster.

Findings

K-means clustering and CLA suggested optimal delivery routes on which vehicles will run. The complete algorithm was able to provide a solution within 30 s.

Practical implications

Clustering of delivery locations and use of heterogeneous fleet of delivery vehicles can result in considerable savings in daily operational cost.

Originality/value

Most of the research related to the use of demand clustering to improve distribution routes has been theoretical, which do not take into account real-world limitations like vehicle’s specific limitations. The authors tried to address that gap by taking a real-world case of a cooperative dairy and compared the result with existing distribution routes used by dairy. This work can be used by other dairies or distribution companies according to their scenario.
Feel well and do well at work
Authors: Cobaleda Cordero Antonio , Babapour Maral , Karlsson MariAnne
Published: June 2019

Purpose

This paper aims to investigate employee well-being in relation to office landscapes in a post-relocation context. The aims are to identify spatial attributes of the office landscape that influence employee well-being and underlying contextual factors that explain employee well-being post-relocation.

Design/methodology/approach

A mixed-method approach was adopted. The data collection involved 16 semi-structured interviews with employees, an interview with the leading architect of the office renovation, study of a dossier on the renovation project and observations.

Findings

Most of the informants experienced the new office landscape positively despite few shortcomings. Spatial attributes were identified that influenced the informants’ well-being positively in terms of affects, satisfaction, social relations and environmental mastery. Conversely, negative influences on well-being were also reported regarding affects, satisfaction and environmental mastery. Conflicting views on some of the spatial attributes and contextual factors related to the planning process and the former office landscape were identified.

Originality/value

The value of this paper lies in investigating the office landscape at the spatial attributes level, despite office type, and their influence on hedonic and eudaimonic components of employee well-being. The research approach adopted proved its usefulness for in-depth studies of the interrelations between office landscapes and employee well-being.
Paving the path toward strategic agility
Authors: Nejatian Majid , Zarei Mohammad Hossein , Rajabzadeh Ali , Azar Adel , Khadivar Ameneh
Published: June 2019

Purpose

For organizations competing in volatile environments, strategic agility is the key for sustaining in the market. It is essential for such organizations to identify the main agility indicators that contribute to their strategic core. The purpose of this paper is to propose and test a systematic methodology that identifies key agility indicators through prioritization and establishing the intra- and inter-relationships among them.

Design/methodology/approach

The methodology consists of four phases. Phase I forms a pool of agility key performance indicators (KPIs). Phase II categorizes and ranks the KPIs based on their importance and the gap that exists between their current and desired level. Using interpretive structural modeling, phase III establishes the intra-relationships among the KPIs as well as agility attributes, agility enablers and improvement paths, collectively referred to as agility indicators. Finally, phase IV analyzes the inter-relationships among agility indicators using three consecutive houses of quality.

Findings

To demonstrate the capability of the proposed methodology, it was applied to a dairy food company operating in a competitive environment. The application could address the shortcomings of previous agility methodologies and helped the company to assign resources to the right agility indicators with the highest influence on strategic agility.

Research limitations/implications

The methodology was applied to a single organization only. The application does not include long-term post-implementation observations and measurement of strategic agility.

Practical implications

Practitioners can benefit from the methodology to identify the right agility indicators of their organization and assign organizational resources for the improvement of such indicators. The methodology ensures selecting indicators that contribute to organization’s strategic agility, although ostensibly seem unrelated.

Originality/value

The paper contributes to the literature of strategic and organizational agility by proposing a systematic methodology that considers both intra- and inter-relationships among agility indicators. The methodology also makes a decent contribution in addressing organizational ambidexterity by analyzing mutually exclusive indicators pertaining to current and future opportunities for the organization.
Does being beautiful always help? Contingency effects of physical attractiveness of the service providers on customer response
Authors: Li Yaoqi , Xie Lishan , Gao Teng , Guan Xinhua
Published: June 2019

Purpose

This paper aims to explore the physical attractiveness stereotype in service encounters. Specifically, this paper examines how physical attractiveness affects a customer’s response and whether a customer’s social interaction anxiety and the consumption situation moderate this relationship.

Design/methodology/approach

Three experiments were used to test hypotheses. Participants were subject to scenarios of varying levels of physical attractiveness (more vs less), social interaction anxiety (high vs low) and consumption situation (private vs public). Customer participation intention and citizenship behavior were measured along scales.

Findings

The results indicate that the physical attractiveness of service providers positively affects customer citizenship behavior, and customer participation intention mediates this relationship. However, the effect only exists for a customer with low social interaction anxiety or presents itself under public consumption conditions.

Research limitations/implications

This work paints a more nuanced picture of missing links in the understanding of the influence of service providers’ physical attractiveness. It enriches the physical attractiveness stereotype literature by identifying the mediating role of customer participation intention while bounding the relationship within conditions related to a customer’s social interaction anxiety and the service consumption situation.

Practical implications

Management may alter the performance of service employees by considering the employee’s physical attractiveness and gauging customer social interaction anxiety while keeping in mind the consumption situation.

Originality/value

This study advances physical attractiveness stereotype research by examining its effect on customer participation intention and citizenship behavior in the service industry. Additionally, this study adds customer social interaction anxiety and consumption situation to the existing literature that addresses employee factors affecting customer behavior.
Crowdfunding in real estate: evolutionary and disruptive
Authors: Shahrokhi Manuchehr , Parhizgari A.M.
Published: June 2019

Purpose

The purpose of this paper is to analyze the determinants and the operational aspects of real estate crowdfunding (RECF henceforth). It addresses RECF growth, drivers and platforms in light of modern digital technology.

Design/methodology/approach

A comparison with traditional real estate funding is provided, and the ease and advantages that RECF offers to real estate investors are analyzed. The risks and rewards of crowdfunding in general and RECF in particular are also addressed.

Findings

Inasmuch as RECF appears novel and disruptive, research in this paper dates RECF back to the seventieth century. The findings thus posit that RECF is an evolutionary process while it is currently transformative and disruptive.

Originality/value

This is a novel look into RECF, particularly in terms of data, analyses and evaluation of alternatives.
Rethinking coral reef functional futures
Authors: Williams Gareth J. , Graham Nicholas A. J.
Published: June 2019

Tropical coral reefs currently face an unprecedented restructuring since their extant form and function emerged ~24 million years ago in the early Neogene. They have entered the Anthropocene—an epoch where humans have become the dominant force of planetary change. Human impacts on and interactions with coral reefs are escalating across multiple trophic levels and scales, but we have a rudimentary understanding of what this means for their functional ecology.

The overall goal of this special feature is to unpack what the Anthropocene means for the functional ecology of coral reefs, laying the foundations for new approaches and research directions in coral reef science. The collection describes the functional changes and novel dynamics that characterise Anthropocene reefs, from variations in their taxonomy and geology through to the resulting shifts in ecosystem services they provide to humanity.

Common changes to coral reefs are occurring that are challenging their historical functional role. These include reductions in benthic calcifiers and declining carbonate production, and benthic assemblage shifts leading to a loss of structural complexity and flattening of reef seascapes. As reefs as we know them are lost from some locations, range extensions and the “tropicalisation” of temperate locations present novel ecosystem configurations that are challenging ecological paradigms and our historical approach to ecosystem management.

Hindering our progress, however, is a “functionality crisis.” Coral reef functional ecology to date has lacked a clear and universal definition of the term “function,” and many assumed links between taxa and reef processes lack empirical evidence. Moving forward, we must establish causal links between functional traits, the species that possess them, and specific ecosystem processes if we are to successfully manage Anthropocene reefs. The functional space coral reefs occupy has arguably widened, presenting ethical challenges surrounding the increasingly interventionist management practices required to achieve particular functional endpoints.

For us to steer coral reefs towards a desirable functional future will require a more mechanistic understanding between ecosystem attributes and the provision of services, acknowledging that such services are coproduced by the ecosystem and society. Ultimately, this era in coral reef ecology requires a new approach to coral reef science, one that addresses the complex socio‐ecological nature of coral reefs. These works outline a path ahead for defining and studying the functional ecology of coral reefs, drive debate as to what we want their functional future to look like and call for ecosystem function to be at the heart of managing coral reef futures during this period of rapid transition.
Bifidobacterium bifidum and the infant gut microbiota: an intriguing case of microbe‐host co‐evolution
Authors: Duranti Sabrina , Lugli Gabriele Andrea , Milani Christian , James Kieran , Mancabelli Leonardo , Turroni Francesca , Alessandri Giulia , Mangifesta Marta , Mancino Walter , Ossiprandi Maria Cristina , Iori Alexandra , Rota Claudio , Gargano Giancarlo , Bernasconi Sergio , Di Pierro Francesco , van Sinderen Douwe , Ventura Marco
Published: June 2019

Bifidobacterium bifidum is reported to be among the first colonizers of the newborn's gastrointestinal tract due to its ability to metabolize human milk oligosaccharides (HMOs). In order to investigate biological features that allow this bifidobacterial species to colonize a newborn, bifidobacterial internally transcribed spacer profiling of stool samples of 50 mother‐infant dyads, as well as corresponding breastmilk samples, was performed. Hierarchical clustering based on bifidobacterial population profiles found in infant faecal samples revealed the presence of four bifidobacterial clusters or the so‐called bifidotypes. Bifidobacterium bifidum was shown to be a key member among bifidotypes, in which its presence correlate with several different bifidobacterial species retrieved in infant faecal samples. For this reason, we investigated cross‐feeding behaviour facilitated by B. bifidum on a bioreactor model using human milk as growth substrate. Transcriptional profiles of this strain were evaluated when grown on nine specific glycans typically constituting HMOs. Remarkably, these analyses suggest extensive co‐evolution with the host and other bifidobacterial species in terms of resource provision and sharing, respectively, activities that appear to support a bifidobacteria‐dominant microbiome.
Measuring individual identity information in animal signals: Overview and performance of available identity metrics
Authors: Linhart Pavel , Osiejuk Tomasz S. , Budka Michał , Šálek Martin , Špinka Marek , Policht Richard , Syrová Michaela , Blumstein Daniel T.
Published: June 2019

Identity signals have been studied for over 50 years but, and somewhat remarkably, there is no consensus as to how to quantify individuality in animal signals. While there is a variety of different metrics to quantify individuality, these methods remain un‐validated and the relationships between them unclear.

We contrasted three univariate and four multivariate identity metrics (and their different computational variants) and evaluated their performance on simulated and empirical datasets.

Of the metrics examined, Beecher's information statistic (HS) performed closest to theoretical expectations and requirements for an ideal identity metric. It could be also easily and reliably converted into the commonly used discrimination score (and vice versa). Although Beecher's information statistic is not entirely independent of study sampling, this problem can be considerably lessened by reducing the number of parameters or by increasing the number of individuals in the analysis.

Because it is easily calculated, has superior performance, can be used to quantify identity information in single variable or in a complete signal and because it indicates the number of individuals who can be discriminated given a set of measurements, we recommend that individuality should be quantified using Beecher's information statistic in future studies. Consistent use of Beecher's information statistic could enable meaningful comparisons and integration of results across different studies of individual identity signals.
Induced indirect defence in a spider–plant system mediated by pericarpial nectaries
Authors: Stefani Vanessa , Alves Vinícius Nunes , Lange Denise
Published: June 2019

Some plant species attacked by herbivore species produce additional resources to attract predators and induce an indirect defence process. We evaluated whetherPalicourea rigida(Rubiaceae) individuals can induce indirect defences as response to herbivory simulation by increasing pericarpial nectar production and volatile emissions, as well as whether spiders are attracted by such induced indirect defences. We selected 30P. rigidaindividuals and simulated herbivory in 15 of them by cutting out half of all leaves using pruning shears. We did not manipulate the other 15 plants (control group). At three different times, we measured nectar volume and calories of the pericarpial nectary in the inflorescences of all plants of control and treatment groups. We also quantified spider abundance on these plants. In another experiment, we selected salticid spider,Thiodinasp., to determine whether predators detect chemical tracks of plant volatiles produced by the plant after herbivory simulations. We also tested whether the honey solution could emit olfactory signals capable of attractive spiders. We showed thatP. rigidaproduced higher volume of pericarpial nectar presenting more calories after herbivory simulation. The abundance of spiders was higher in plants subjected to herbivory simulation than control plants.Thiodinasp. did not respond to the volatile chemical tracks produced by the leaves after the simulation, but it had a positive response to olfactory tracks associated with the sucrose solution. Such an outcome indicates the ability of this spider to locate nectar honey plants and olfactory signals of honey. Thus, plants respond to the action of herbivores by producing more pericarpial nectar and nectar with more calories. Although our knowledge about the olfactory physiology of arachnids remains incipient, we highlight the importance of chemical and olfactory tracks for decision‐making of spiders in foraging on plants and the herbivory influence on the behaviour of cursorial spiders.
Histology, histochemistry and ultrastructure of the nasopharyngeal tonsil of the buffalo (Bubalus bubalis)
Authors: Girgiri Ibrahim Alhaji , Kumar Pawan
Published: June 2019

The light microscopic appearance and ultrastructure of the nasopharyngeal tonsil (tonsilla pharyngea), collected from 12 adult buffaloes of local mixed breed, were explored for the distribution of different types of epithelia, lymphoid tissue and high endothelial venules. The tonsillar mucosa was lined by pseudostratified columnar ciliated epithelium having goblet cells. The respiratory epithelium associated with the underlying lymphoid tissue formed the lymphoepithelium. The epithelium was further modified into follicle‐associated epithelium (FAE) characterized by reduced epithelial height, presence of a few dome‐shaped cuboidal cells equivalent of the M‐cells and absence of goblet and ciliated cells. The lymphoid tissue was distributed in the form of isolated lymphoid cells, diffuse lymphoid tissue and lymphoid follicles, mainly distributed within the propria‐submucosa along with the sero‐mucous glandular tissue. The goblet cells of the respiratory epithelium and the acinar cells contained different mucopolysaccharides. Scanning electron microscopy of the surface mucosa demonstrated a dense mat of cilia, island‐like arrangement of microvillus cells, M‐cells and a few brush‐like cells. The transmission electron microscopy revealed the different cell organelles of the respiratory epithelium and the FAE. Lymphocyte migration via the high endothelial venules in the propria‐submucosa was also observed.
An investigation of an Expanded Encapsulate Model of Social Identity in Collective Action (EMSICA) including perception of threat and intergroup contact to understand support for Islamist terrorism in Indonesia
Authors: Yustisia Whinda , Shadiqi Muhammad Abdan , Milla Mirra Noor , Muluk Hamdi
Published: June 2019

Although there have been many empirical studies of terrorism within the psychology literature, relatively few studies have theorized terrorism from the perspective of collective action theory. The present study aimed to understand factors that predict support for Islamist terrorism by using the Encapsulate Model of Social Identity in Collective Action (EMSICA) perspective. To extend previous studies, we added perception of threat and intergroup contact to the model. A correlational study using 66 terrorism detainees in Indonesia as participants found solid support for our expanded EMSICA. The models extending EMSICA with perception of threat and quantity of contact as predictors had improved fit indices and explained more variance in the dependent variable support for Islamist terrorism, as compared to the standard model. Social identity had a significant direct effect on support for Islamist terrorism and mediated the effect of intergroup contact, perception of threat, perceived injustice, and group efficacy on support for Islamist terrorism.
How I manage patients with follicular lymphoma
Authors: Casulo Carla
Published: June 2019

Recent advances in the treatment of follicular lymphoma (FL) have provided insight into molecular and biological influences on pathogenesis and prognosis. Additionally, numerous available treatment strategies for both newly diagnosed and relapsed disease require thoughtful consideration of patient selection to avoid the burden of overtreatment and toxicities. This review provides a broad overview on our approach to managing patients with low grade FL.
Deep Fluids: A Generative Network for Parameterized Fluid Simulations
Authors: Kim Byungsoo , Azevedo Vinicius C. , Thuerey Nils , Kim Theodore , Gross Markus , Solenthaler Barbara
Published: June 2019

This paper presents a novel generative model to synthesize fluid simulations from a set of reduced parameters. A convolutional neural network is trained on a collection of discrete, parameterizable fluid simulation velocity fields. Due to the capability of deep learning architectures to learn representative features of the data, our generative model is able to accurately approximate the training data set, while providing plausible interpolated in‐betweens. The proposed generative model is optimized for fluids by a novel loss function that guarantees divergence‐free velocity fields at all times. In addition, we demonstrate that we can handle complex parameterizations in reduced spaces, and advance simulations in time by integrating in the latent space with a second network. Our method models a wide variety of fluid behaviors, thus enabling applications such as fast construction of simulations, interpolation of fluids with different parameters, time re‐sampling, latent space simulations, and compression of fluid simulation data. Reconstructed velocity fields are generated up to 700× faster than re‐simulating the data with the underlying CPU solver, while achieving compression rates of up to 1300×.
Learning to Importance Sample in Primary Sample Space
Authors: Zheng Quan , Zwicker Matthias
Published: June 2019

Importance sampling is one of the most widely used variance reduction strategies in Monte Carlo rendering. We propose a novel importance sampling technique that uses a neural network to learn how to sample from a desired density represented by a set of samples. Our approach considers an existing Monte Carlo rendering algorithm as a black box. During a scene‐dependent training phase, we learn to generate samples with a desired density in the primary sample space of the renderer using maximum likelihood estimation. We leverage a recent neural network architecture that was designed to represent real‐valued non‐volume preserving (“Real NVP”) transformations in high dimensional spaces. We use Real NVP to non‐linearly warp primary sample space and obtain desired densities. In addition, Real NVP efficiently computes the determinant of the Jacobian of the warp, which is required to implement the change of integration variables implied by the warp. A main advantage of our approach is that it is agnostic of underlying light transport effects, and can be combined with an existing rendering technique by treating it as a black box. We show that our approach leads to effective variance reduction in several practical scenarios.
Deep HDR Video from Sequences with Alternating Exposures
Authors: Kalantari Nima Khademi , Ramamoorthi Ravi
Published: June 2019

A practical way to generate a high dynamic range (HDR) video using off‐the‐shelf cameras is to capture a sequence with alternating exposures and reconstruct the missing content at each frame. Unfortunately, existing approaches are typically slow and are not able to handle challenging cases. In this paper, we propose a learning‐based approach to address this difficult problem. To do this, we use two sequential convolutional neural networks (CNN) to model the entire HDR video reconstruction process. In the first step, we align the neighboring frames to the current frame by estimating the flows between them using a network, which is specifically designed for this application. We then combine the aligned and current images using another CNN to produce the final HDR frame. We perform an end‐to‐end training by minimizing the error between the reconstructed and ground truth HDR images on a set of training scenes. We produce our training data synthetically from existing HDR video datasets and simulate the imperfections of standard digital cameras using a simple approach. Experimental results demonstrate that our approach produces high‐quality HDR videos and is an order of magnitude faster than the state‐of‐the‐art techniques for sequences with two and three alternating exposures.
Randomized clinical study using xenograft blocks loaded with bone morphogenetic protein‐2 or autogenous bone blocks for ridge augmentation – A three‐dimensional analysis
Authors: Thoma Daniel S. , Bienz Stefan P. , Payer Michael , Hüsler Jürg , Schmidlin Patrick R. , Hämmerle Christoph H. F. , Jakse Norbert , Jung Ronald E.
Published: June 2019

Objectives

To test whether or not the use of a xenogeneic block loaded with rhBMP‐2 results in superior radiological and profilometric outcomes compared to an autogenous bone block.

Materials and methods

Twenty‐four patients randomly received a xenogeneic block loaded with rhBMP‐2 (test) or an autogenous bone block (control) for primary augmentation. The ridge width (RW) was evaluated by means of a CBCT scan after augmentation surgery and at 4 months, prior to implant placement. Surface scans were taken prior to augmentation and at 4 months for profilometric analyses. Data were analyzed with Wilcoxon‐signed rank test, Mann–Whitney test, or nonparametric ANOVA models.

Results

The median RW after augmentation amounted to 7.13 mm (Q1 = 6.02; Q3 = 8.47) for test and 6.86 mm (Q1 = 5.99; Q3 = 8.95) for control. During 4 months of healing, the total RW decreased statistically significantly and measured 5.35 mm (Q1 = 4.53; Q3 = 6.7) for test and 5.15 mm (Q1 = 3.57; Q3 = 7.24) for control (p = 0.0005). The differences between the groups were not statistically significant (p > 0.5899). The buccal soft tissue contour slightly increased for test (0.83 mm; Q1 = 0.62; Q3 = 1.87) and control (1.16 mm; Q1 = 0.50; Q3 = 1.44).

Conclusions

Both treatment modalities successfully increased the ridge width to a similar extent. The shrinkage during healing was not greater in the test than in the control group. The impact of hard tissue augmentation on the soft tissue contour was, however, minimal.
Deficiencies in reproductive health counseling in liver transplant recipients
Authors: Phillips Paulina K. , Saha Sumona , Foley David P. , Iruretagoyena Jesus I. , Said Adnan
Published: June 2019

Background

In liver transplant (LT) recipients of childbearing age, there is often rapid return of fertility post‐transplant. Our aim was to determine whether healthcare providers are documenting reproductive health counseling in LT recipients.

Methods

We performed a review of 365 LT recipients (164 female, 201 male) of childbearing age transplanted between 1994 and 2015 at a single center. We evaluated documentation of reproductive health counseling, content of the counseling and its provider.

Results

Reproductive health counseling was documented in 7% of LT recipients (14% of females, 0.5% of males). The transplant team provided the counseling in 56%, obstetrics/gynecology in 35%, and primary care in 9%. Twenty‐four post‐LT pregnancies occurred; these were unplanned in 13%. Miscarriage/stillbirth occurred in 7/24 pregnancies (29%). Mycophenolic acid was used by 20% of female recipients at conception. Only age at transplant (P = 0.001) and post‐LT pregnancy was associated with documentation of reproductive health counseling in female recipients (P = 0.0001).

Conclusion

Despite rapid return of fertility in reproductive‐aged LT recipients, documentation of reproductive health counseling in this population is rare in men and women. This increases the potential for adverse maternal and fetal outcomes in this high‐risk population.
Longitudinal causal impacts of preschool teacher training on Ghanaian children’s school readiness: Evidence for persistence and fade‐out
Authors: Wolf Sharon , Aber J. Lawrence , Behrman Jere R. , Peele Morgan
Published: June 2019

Preschool programs have expanded rapidly in low‐ and middle‐income countries, but there are widespread concerns about whether they are of sufficient quality to promote children's learning and development. We conducted a large school‐randomized control trial (‘Quality Preschool for Ghana’ – QP4G) of a one‐year teacher training and coaching program, with and without parental‐awareness meetings, designed to improve preschool quality and child development. We followed 3,435 children in 240 schools in the Greater Accra Region of Ghana, a country with universal pre‐primary education. A previous study reported positive impacts of teacher training (but not teacher training plus parental‐awareness meetings) at the end of the implementation year on some dimensions of classroom quality, teacher well‐being, and children's school readiness (Wolf et al., [2019] Journal of Research on Educational Effectiveness, 12, 10–37). The present study analyzed a new round of data collected 1 year after the end of implementation to assess (a) the extent of persistence in impacts on child development and (b) whether such impacts vary by select child, household, and school characteristics. We found impacts of the teacher training intervention on children's overall school readiness were sustained (d = 0.13), but were only marginally statistically significant. When broken down by domain, impacts on social–emotional skills specifically persisted. Persistent negative effects of teacher training plus parental‐awareness meetings varied by the literacy status of the male parent such that negative impacts were concentrated in children in households with non‐literate male heads.