bluuebunny/crossref_metadata_2025_split huggingface dataset:
INFERRING PLANET MASS FROM SPIRAL STRUCTURES IN PROTOPLANETARY DISKS
Authors: Fung (馮澤之) Jeffrey , Dong (董若冰) Ruobing 
Published: December 2015

ABSTRACT
Recent observations of protoplanetary disk have reported spiral structures that are potential signatures of embedded planets, and modeling efforts have shown that a single planet can excite multiple spiral arms, in contrast to conventional disk–planet interaction theory. Using two and three-dimensional hydrodynamics simulations to perform a systematic parameter survey, we confirm the existence of multiple spiral arms in disks with a single planet, and discover a scaling relation between the azimuthal separation of the primary and secondary arm,

and the planet-to-star mass ratio q:

for companions between Neptune mass and 16 Jupiter masses around a 1 solar mass star, and

for brown dwarf mass companions. This relation is independent of the disk’s temperature, and can be used to infer a planet’s mass to within an accuracy of about 30% given only the morphology of a face-on disk. Combining hydrodynamics and Monte-Carlo radiative transfer calculations, we verify that our numerical measurements of

are accurate representations of what would be measured in near-infrared scattered light images, such as those expected to be taken by Gemini/GPI, Very Large Telescope/SPHERE, or Subaru/SCExAO in the future. Finally, we are able to infer, using our scaling relation, that the planet responsible for the spiral structure in SAO 206462 has a mass of about 6 Jupiter masses.
chromPlot: visualization of genomic data in chromosomal context
Authors: Oróstica Karen Y. , Verdugo Ricardo A. 
Published: December 2015

ABSTRACTSummary:Visualizing genomic data in chromosomal context can help detecting errors in data generation or analysis and can suggest new hypotheses to be tested. Here we report a new tool for displaying large and diverse genomic data in idiograms of one or multiple chromosomes. The package is implemented in R so that visualization can be easily integrated with its numerous packages for processing genomic data. It supports simultaneous visualization of multiples tracks of data, each of potentially different nature. Large genomic regions such as QTLs or synteny tracts may be shown along histograms of number of genes, genetic variants, or any other type of genomic element. Tracks can also contain values for continuous or categorical variables and the user can choose among points, points connected by lines, line segments, barplots or histograms for representing data. chromPlot reads data from tables in BED format which are imported in R using its builtin functions. The information necessary to draw chromosomes for mouse and human is included with the package. Chromosomes for other organisms are downloaded automatically from the Ensembl website or can be provided by the user. We present common use cases here, and a full tutorial is included as the packages's vignette.Availability:chromPlot is distributed under a GLP2 licence at Genomed Lab:http://genomed.med.uchile.cl.Contact:raverdugo@u.uchile.cl
Evolutionary dynamics of cytoplasmic segregation and fusion: mitochondrial mixing facilitated the evolution of sex at the origin of eukaryotes
Authors: Radzvilavicius Arunas L. 
Published: December 2015

AbstractSexual reproduction is a trait shared by all complex life, but explaining its origin and evolution remains a major theoretical challenge. Virtually all theoretical work on the evolution of sex has focused on the benefits of reciprocal recombination among nuclear genes, paying little attention to the dynamics of mitochondrial genes. Here I develop a mathematical model to study the evolution of alleles inducing cell fusion in an ancestral population of clonal proto-eukaryotes. Mitochondrial mixing masks the detrimental effects of faulty organelles and drives the evolution of sexual cell fusion despite the declining long-term population fitness. Cell-fusion alleles fix under negative epistatic interactions between mitochondrial mutations and strong purifying selection, low mutation load and weak mitochondrial-nuclear associations. I argue that similar conditions could have been maintained throughout the eukaryogenesis, favoring the evolution of sexual cell fusion and meiotic recombination without compromising the stability of the emerging complex cell.
Current challenges for citizenship education in England
Authors: Davies Ian , Chong Eric K. M. 
Published: December 2015

Purpose
– The purpose of this paper is to describe and discuss current challenges for citizenship education in England.

Design/methodology/approach
– This paper provides a relatively brief overview of the reasons for the introduction of citizenship education into the National Curriculum. Then, it describes the different versions (in 2002, 2008 and 2014) of the National Curriculum for citizenship. Finally, this paper draws attention to the issues that explain the reasons for the radical change in status and nature of citizenship education evidenced by the 2014 version of the subject.

Findings
– Following the period 1998-2010 in which citizenship education became research informed and professionally developed, policy makers now since 2014 seem to be involved in the development of citizenship education in the National Curriculum in the form of promoting knowledge about civics, willingness to volunteer and a commitment to manage responsibly personal finances. In 2014 policy makers have confirmed the place of citizenship education in the National Curriculum but its nature, the relative lack of attention devoted to it and the growing official commitment to character education which emphasises personal morality rather than citizenship education suggests that it has lost a lot of ground. This paper argues that there are parallels between what we felt had happened at earlier points, principally, the early 1990s, when political education had been rejected in favour of a particular form of citizenship education (i.e. volunteering); and the situation in 2014 when volunteering and character education are now officially preferred.

Originality/value
– This paper argues for a need to address key current challenges in citizenship education in the context of earlier development.
Democratic and participatory citizenship: youth action for sustainability in Australia
Authors: Henderson Deborah J. , Tudball Elizabeth J. 
Published: December 2015

Purpose
– The purpose of this paper is to provide a critical analysis of recent examples of action competence among young people engaged in democratic participatory action in sustainability programs in Australia. It explores examples of priorities identified for citizen action, the forms this action takes and the ways that democratic participation can achieve positive outcomes for future sustainability. It suggests multiple ways for developing action competence that provides further opportunities for authentic and engaging citizen action for youth connected to school- and community-based learning, in new and powerful ways.

Design/methodology/approach
– This conceptual paper examines international literature on the theory of “action competence,” its significance for education for sustainability (EfS) and the ways it can inform education for young people’s democratic participatory citizenship and civic engagement. It analyses examples of the development of action competency among young people in Australia, including the problems and priorities identified for citizen action, the forms this action takes and how it can achieve positive outcomes for sustainability. Following this analysis, the paper suggests multiple ways for developing action competence in EfS in schools and communities in new and powerful ways.

Findings
– Developing EfS to increase democratic and participatory action among young citizens is now widely regarded as an urgent education priority. There are growing exemplars of school and community organizations’ involvement in developing EfS learning and teaching to increase participatory citizenship. Young people are being empowered to develop a greater sense of agency through involvement in programs that develop action competence with a focus on sustainability in and out of school. New forms of participation include student action teams and peer collaboration among youth who are marshaling social media and direction action to achieve change.

Originality/value
– It contributes to the literature on multiple ways for developing action competence in EfS.
Building a democratic society: exploring Singapore students ' understandings of democracy
Authors: Sim Jasmine B.-Y. , Krishnasamy Malathy 
Published: December 2015

Purpose– One would not commonly associate democracy with Singapore, instead scholars have often described Singapore as an illiberal democracy and an authoritarian state. At the same time, all Singaporean school students recite the national pledge of allegiance in school every morning, in which they pledge “to build a democratic society based on justice and equality”. What do students know about democracy? Are they able to distinguish the characteristics of democratic systems from non-democratic ones? The purpose of this paper is to report on Singapore students’ understandings of democracy.Design/methodology/approach– Using a qualitative instrumental case study design, 64 students from three secondary schools were interviewed and the social studies curriculum was analysed.Findings– Overall, students had poor knowledge of democracy. Consistent with a lack of knowledge of democracy, most students also showed a relatively uncritical acceptance of hierarchy and deference to authority, and held a superficial understanding of citizenship. Civics lessons through social studies, and the school environment did little to promote students’ engagement with democracy.Research limitations/implications– The authors argue that it is important that students be given the opportunities to develop a basic conceptual knowledge of democracy, as they are not capable of discriminating democratic characteristics from non-democratic ones without it. At the very least, students should know the relevance of what they pledge relative to their nation’s model of democracy, or in the absence of a clear model, be encouraged to struggle with the various existing models of democracies so that, as the future of Singapore, they might determine and adapt the ideals that they deem best for the nation.Originality/value– This paper is an original study of Singapore students’ understandings of democracy.
Investor relations via Web 2.0 social media channels
Authors: von Alberti-Alhtaybat Larissa , Al-Htaybat Khaldoon 
Published: December 2015

Purpose– The purpose of this paper is to investigate the use of Web 2.0-based social media for investor relations (IR), in the Middle Eastern (ME) context. IR is one of the under-researched topics of the corporate reporting subject area. This study seeks to contribute by investigating social media for IR in a ME context. It researches the perceptions of corporations, and individual and institutional investors regarding the phenomenon of social media for IR, given the particular cultural context. A conceptual model guiding future research is developed out of the analyzed data.Design/methodology/approach– The research approach is qualitative and exploratory in nature, as the aim is to analyze perceptions and opinions of participants, in order to develop a theoretical argument based on these. To this end, the study employs a qualitative methodology and interview data collection. Data are analyzed using qualitative research coding styles.Findings– Primary findings are encompassed in the theoretical framework, which theorises the adoption of social media for investor relation in particular but addresses voluntary corporate reporting in general. The study determines that there are various factors that support and hinder adoption, such as willingness to adopt social media for IR and potential risks and benefit, and that there are anticipated outcomes, such as improved communications between investors and corporations and a related power adjustment. The new element regarding IR that transpired out of the current study is the notion of investor empowerment and the directly related fear of lack, or essentially loss, of control.Originality/value– The ME societies are very interested in social media applications, and utilize these in a broad range of their daily work and private activities. IR, as part of voluntary reporting, have been subject of recent debate, as little guidance is available and corporations’ practices vary. The current study highlights these factors in a largely under-researched market, the ME, and focuses a broader knowledge contribution based on the current findings. Finally, the concept of power is investigated in both its conventional and postmodern sense.
Nutritional supplement-usage associated characteristics of high-performing athletes
Authors: Sousa Mónica , Fernandes Maria João , Soares José , Moreira Pedro , Teixeira Vítor Hugo 
Published: December 2015

Purpose
– The purpose of this paper is to analyse differences in sociodemographic and sporting characteristics, health-behaviours, and food intake of athletes using and not using nutritional supplements (NS).

Design/methodology/approach
– High-performance Portuguese athletes from 13 sports completed a NS usage questionnaire, assessing information on sociodemographic (sex, age, height, weight, athlete’s, and parental education level), health-related (smoking, daily time of sleeping, walking, and sitting), and sporting (type, number of international performances, weekly hours of training and weekly hours of gym) characteristics; and a semi-quantitative food-frequency questionnaire (86 items), regarding the previous 12 months.

Findings
– From the 241 athletes (66 per cent males, 13-37 years), 64 per cent reported NS use. Supplement usage was associated with age 18 years (odds ratio (OR) 2.57, 95 per cent; confidence interval (CI) 1.17-5.65), performing individual sports (OR 5.45, 95 per cent; CI 2.49-11.93) and
>
2 h gym/week (OR 2.42, 95 per cent; CI 1.15-5.11), a higher consumption of meat (OR 2.83, 95 per cent; CI 1.36-5.90), eggs (OR 2.53, 95 per cent; CI 1.07-5.96), and yogurt (OR 2.24, 95 per cent; CI 1.08-4.62), and a lower intake of processed meat (OR 0.32, 95 per cent; CI 0.15-0.72), vegetable oils (OR 0.35, 95 per cent; CI 0.17-0.74), margarine (OR 0.37, 95 per cent; CI 0.18-0.76), chips (OR 0.22, 95 per cent; CI 0.10-0.48), and fast food (OR 0.42, 95 per cent; CI 0.19-0.91).

Originality/value
– Athletes using NS had different characteristics from non-users, and seemed to have healthier and more sports-oriented food choices. Our findings may help sport and health professionals to identify an alleged or future NS user, enabling the development of a timely and self-directed supplement scheme.
The level of food safety knowledge among meat handlers
Authors: Smigic Nada , Antic Dragan , Blagojevic Bojan , Tomasevic Igor , Djekic Ilija 
Published: December 2015

Purpose
– The purpose of this paper was to evaluate food safety knowledge of among meat handlers in Serbian meat establishments along the meat chain, i.e. in slaughterhouses, meat processing plants and retail stores.

Design/methodology/approach
– A structured, self-administrative questionnaire was designed and used to assess the level of food safety knowledge among handlers in different meat establishments. In total, of 352 meat handlers were involved in this study, with 110 handlers from slaughterhouses (31 per cent), 125 handlers from meat processing plants (36 per cent) and 116 handlers from retail stores (33 per cent). For each participant, the knowledge score was calculated by dividing the sum of correct answers by the total number of correct responses. Additionally, knowledge gaps among meat handlers were identified for each question across the three types of establishments (slaughterhouses, meat processing plants and retail stores).

Findings
– The average knowledge score for all participants was 64 per cent, whereas handlers from slaughterhouses and meat processing plants obtained significantly better scores (65 per cent and 66 per cent, respectively) than handlers from retail (60 per cent, p
<
0.05). The knowledge score among all meat handlers was significantly associated with the age, education and previous food safety trainings. Results indicated that 57.9 per cent meat handlers could identify that bacteria will readily multiply at 25 °C, but they do not understand the manifestation of bacterial growth and incidence in food, as only 5.5 per cent of all meat handlers knew that food contaminated with food poisoning bacteria cannot be recognized by visual, olfactory or taste checks.

Originality/value
– This is the first research aimed to investigate the food safety knowledge among meat handlers in Serbia and also the first research performed to determine food safety knowledge among workers operating in different phases of the meat chain, namely meat handlers from slaughterhouses, meat processing plants and retail stores.
Organic food consumer profile in the Republic of Serbia
Authors: Grubor Aleksandar , Djokic Nenad 
Published: December 2015

Purpose
– Having the discrepancies between different descriptions of an organic food consumer profile in various researches worldwide as well as the causes of their emergence as a starting point, the purpose of this paper is to apply the method of preference-based market segmentation (by means of conjoint and cluster analysis) to Serbian organic food market, searching for advantages of using that methodological approach and deepening knowledge about specific organic food market.

Design/methodology/approach
– The research was conducted from May to July 2014 with 400 respondents participating (aged 18-30). Primary data were gathered by means of focus groups and a survey – structured personal interviews by using a questionnaire.

Findings
– When applying conjoint and cluster analysis to data about Serbian consumers’ preferences towards researched product, it is possible to identify a segment that prefers organic food the most. Compared to other segments, these consumers are predominantly female, somewhat more mature, with the highest proportion of employed and near the top by the percentage of respondents who are married and have children. They strongly value the importance of diet for health, a number of them have experience with a disease of a close person, which is believed that could be prevented by proper diet, but they do the least sports.

Practical implications
– The authors give managerial recommendations to actors operating at domestic organic food market.

Originality/value
– According to the authors’ knowledge, the first application of preference-based market segmentation by conjoint and cluster analysis to organic food market, performed in Serbia, generally characterised by scarce food consumer research.
PrimarWebQuest in foreign language education
Authors: Csida Stefanie , Mewald Claudia 
Published: December 2015

Purpose– The purpose of this paper is to demonstrate the teacher and pupil learning progress through the first implementation of a computer-based method called PrimarWebQuest in a primary school classroom. The study aimed at identifying cognitive and metacognitive skills that are needed to work successfully with the platform. To do so, this lesson study (LS) investigated the pupils’ strategy acquisition and analysed their autonomy and knowledge growth making use of observation, collaborative reflection, questionnaires, content analysis and triangulation. Additionally, the teacher’s development of methodological skills in the use of the strategy was investigated.Design/methodology/approach– A LS was carried out in an urban primary school in Lower Austria over a period of four weeks. Based on an experiment carried out during two project days, the learning and the pupils’ strategy use as regards their autonomy and self-direction were observed and their knowledge growth was analysed making use of pre-and post-tests. Moreover, questionnaires and post-lesson interviews were implemented to verify insights gained from observation and post-lesson discussions in the teacher research group, which consisted of the main investigating teacher, the two class teachers and an external expert.Findings– The study suggests that the pupils’ learning outcomes and self-direction improved through teaching with PrimarWebQuests and also after implementing the refined lesson plan. The results demonstrate the value of learning through new media and emphasise the importance of giving precise instructions as well as the need for careful guidance through the teacher in autonomous learning scenarios including new media.Originality/value– The findings of the study provide a deeper understanding of and guidelines for planning and implementing computer-based lessons with PrimarWebQuests, which may be useful for teachers and curriculum designers.
Could “Lean Lite” be the cost effective solution to applying lean manufacturing in developing economies?
Authors: Chaplin Lara , Heap John , O'Rourke Simon T.J. 
Published: December 2015

Purpose
– The purpose of this paper is to suggest a solution to the problem of implementing a full “Lean” methodology for small-/medium-sized enterprises (SMEs) in a developing economy.

Design/methodology/approach
– This is a reflective paper that looks at an illustrative case study against the wider perspectives of the financial and resource costs of implementing a full lean programme in a developing country and suggests that using a “Lean Lite” approach may help the consultant/manager introduce lean concepts into a manufacturing organisation in a developing country.

Findings
– The paper concludes that “Lean Lite” as an approach that can be used to introduce lean initiatives in an SME in a developing economy by allowing a company with very limited resources to engage not only in business improvement but also in improving working conditions and education for employees.

Research limitations/implications
– The observations are limited to a single case study, although tempered by the authors’ wider experience. Further empirical research and critique of the original research is required to validate the observations and conclusions.

Practical implications
– The proposed “Lean Lite” initiative can help to introduce lean concepts to an organisation with limited financial and other resources. This helps organisations to increase productivity and assists the adoption of the lean philosophy and principles in a developing economy. The approach may also be used to engage in a wider corporate social responsibility strategy at ground level.

Social implications
– The social benefits as a result of implementing a Lean Lite approach include improving working conditions and educating employees.

Originality/value
– The paper proposes an approach that can be used to widen organisational involvement in lean initiatives in a developing economy by allowing a company with limited resources to engage not only in business improvement but also in improving working conditions and education for employees. As such the approach has both economic and social benefits.