scholarly journals Generalizing Bayesian phylogenetics to infer shared evolutionary events

2021 ◽  
Author(s):  
Jamie R Oaks ◽  
Perry L Wood

Many processes of biological diversification can affect multiple evolutionary lineages. Examples include multiple members of a gene family diverging when a region of a chromosome is duplicated, multiple viral strains diverging at a "super-spreading" event, and a geological event fragmenting whole communities of species. It is difficult to test for patterns predicted by such processes, because all phylogenetic methods assume that lineages diverge independently. We introduce a general Bayesian framework to relax the assumption of independent divergences during phylogenetic inference, and test for patterns predicted by processes of diversification that affect multiple evolutionary lineages. Using simulations, we find our new method accurately infers shared divergence events when they occur, and performs as well as current methods when divergnces are independent. We apply our new approach to genomic data from two genera of geckos from across the Philippines to test if past changes to the islands' landscape caused bursts of speciation. Unlike previous analyses restricted to only pairs of populations, we find evidence for patterns of shared divergences. By generalizing the space of phylogenetic trees in a way that is independent from the likelihood model, our approach opens many avenues for future research.

2019 ◽  
Vol 76 (1) ◽  
pp. 333-353 ◽  
Author(s):  
Stephen Macdonald ◽  
Briony Birdi

Purpose Neutrality is a much debated value in library and information science (LIS). The “neutrality debate” is characterised by opinionated discussions in contrasting contexts. The purpose of this paper is to fill a gap in the literature by bringing these conceptions together holistically, with potential to deepen understanding of LIS neutrality. Design/methodology/approach First, a literature review identified conceptions of neutrality reported in the LIS literature. Second, seven phenomenographic interviews with LIS professionals were conducted across three professional sectors. To maximise variation, each sector comprised at least one interview with a professional of five or fewer years’ experience and one with ten or more years’ experience. Third, conceptions from the literature and interviews were compared for similarities and disparities. Findings In four conceptions, each were found in the literature and interviews. In the literature, these were labelled: “favourable”, “tacit value”, “social institutions” and “value-laden profession”, whilst in interviews they were labelled: “core value”, “subservient”, “ambivalent”, and “hidden values”. The study’s main finding notes the “ambivalent” conception in interviews is not captured by a largely polarised literature, which oversimplifies neutrality’s complexity. To accommodate this complexity, it is suggested that future research should look to reconcile perceptions from either side of the “neutral non-neutral divide” through an inclusive normative framework. Originality/value This study’s value lies in its descriptive methodology, which brings LIS neutrality together in a holistic framework. This framework brings a contextual awareness to LIS neutrality lacking in previous research. This awareness has the potential to change the tone of the LIS neutrality debate.


2014 ◽  
Vol 21 (3) ◽  
pp. 368-384 ◽  
Author(s):  
Lidija Breznik ◽  
Robert D. Hisrich

Purpose – The purpose of this paper is to provide insights into the relationship between dynamic capabilities and innovation capabilities. It links dynamic capability with innovation capability and indicates the ways they can be related. Design/methodology/approach – The relationships between dynamic and innovation capability were investigated through a systematic literature review. Findings – The review indicates that common characteristics exist between of the both fields, which demonstrate six relationships. Additionally, findings show some inconsistencies and even contradictions. Originality/value – In this paper, the authors have compared dynamic capabilities, a relatively new approach in the field of strategic management, with innovation capabilities, a widely recognised crucial domain for sustained competitiveness. Since both areas address issues that are essential to today's environment, future research should seek to clarify both concepts, by undertaking some new research and developing comprehensive and unambiguous framework.


2019 ◽  
Vol 24 (1) ◽  
pp. 147-169 ◽  
Author(s):  
Britta Søgaard ◽  
Heather Dawn Skipworth ◽  
Michael Bourlakis ◽  
Carlos Mena ◽  
Richard Wilding

PurposeThis paper aims to explore how purchasing could respond to disruptive technologies by examining the assumptions underlying purchasing strategic alignment and purchasing maturity through a contingency lens.Design/methodology/approachThis study uses a systematic review across purchasing maturity and purchasing strategic alignment literature. This is supplemented with exploratory case studies to include practitioners’ views.FindingsThis research demonstrates that neither purchasing maturity nor purchasing strategic alignment are suitable approaches to respond to disruptive technologies. Purchasing maturity does not allow purchasing managers to select relevant practices. It also shows no consideration of any contingencies, which practitioners highlight as important for the selection of practices. Purchasing strategic alignment includes the company strategy as a contingency but does not provide any practices to choose from. It does not include any other contextual contingencies considered important by practitioners. The findings indicate that linking the two research streams may provide a more suitable approach to responding to disruptive technologies.Research limitations/implicationsThis research demonstrates the requirement to develop a new approach to responding to disruptive technologies, by linking purchasing maturity and purchasing strategic alignment to contextual contingencies. This is a currently unexplored approach in academic literature, which refutes the generally accepted premise that higher maturity unilaterally supports a better positioning towards technological disruption. This research also highlights a requirement for practitioners to shift their approach to “best practices”.Originality/valueThis is the first research to systematically review the relationships between purchasing maturity and purchasing strategic alignment. It adds to contingency theory by suggesting that purchasing maturity models can support the achievement of strategic alignment. Also, future research directions are suggested to explore these relationships.


PCD Journal ◽  
2019 ◽  
Vol 6 (2) ◽  
pp. 305
Author(s):  
Erickson D Calata ◽  
Reginald G. Ugaddan

There are frequent calls to enhance citizens' trust in government to pave the way towards a new paradigm of participatory governance and strong citizen support for government. In various realms, citizens may directly or indirectly engage with the government through various available mediums, even though, despite the availability of various policies and services provided by the government, citizens are generally passive and adamant in trusting the public sector. While many studies have explored a set of determinants that influence citizens' trust in government (i.e., central government, local government, parliament, and the legal system), few studies have ascertained the relationship and the role of social trust, happiness, governance, and political systems. These are critical factors that may influence trust in government. To address this gap, this study draws on the theoretical lens of social capital theory, proposing that cognitive social trust and citizen happiness—environment and performance—are the most likely predictors of citizen trust in government. This study assumes that citizens' perceptions of governance and political systems will moderate the effect of social trust and happiness on trust in government. Using data from the Asia Barometer Survey 2007, and focusing on data collected from the Philippines, this study tests a latent model employing the structural equation modelling technique. It finds that happiness negatively predicts trust in the central government and the legal system, while all other predictors do not have a significant effect. The findings also show that the political system moderates the impact of social trust and happiness on trust in government. Finally, this article points out its theoretical, empirical, and practical implications and provides directions for future research.


Author(s):  
Johnny J. Yao

A professional skill that permits nursing students to carry out nursing interventions in the workplace is the ability to solve health care problems. This is essential if they want to become professional nurses. Educators have been attempting to establish effective instructional techniques to improve nursing students’ problem-solving abilities. This study examined the relationship between problem-solving ability, academic self-efficacy, and self-directed learning readiness (SDLR) among nursing students. This study utilized a descriptive correlational study and recruited 170 nursing students in a private higher education institution in the Philippines. Standardized questionnaires were distributed, and data were analyzed using descriptive and inferential statistics. Results show that there is a significant indirect association between problem-solving ability and SDLR (r = -0.525, p < 0.001). Secondly, there is a significant direct association between SDLR and academic self-efficacy (r = 0.549, p < 0.001). Lastly, there is a significant indirect association between academic self-efficacy and problem-solving ability (r = -0.505, p < 0.001). The findings substantiate the assumptions of the study that academic self-efficacy, SDLR, and problem-solving ability of students have relationships with each other. Thus, students who are self-directed learners and are confident with their abilities of success in school tasks are able to solve complex problems or issues. Future research may be explored using longitudinal designs to be able to ascertain the causal link and directionality of the variables related to the present study.


2021 ◽  
Vol 24 ◽  
pp. 26-37
Author(s):  
Jonah C. Balba ◽  
Manuel E. Cainigcoy

Individuals with high self-concept will likely have high life satisfaction, they easily get adjusted to life, and they communicate their feeling more appropriately. However, it was not certain whether self-concept would decline or improve as individuals age, or whether self-concept would vary between genders and ethnic groups.  To prove, a study was carried out to compare the self-concept of college students in an Asian context. The inquiry utilized the cross-sectional design in finding out significant differences in the self-concept of participants in terms of age, gender, and ethnicity. A 22-item questionnaire was adapted and administered to 222 Bachelor of Public Administration and Bachelor of Science in Business Administration students from the satellite campus of Bukidnon State University in the Philippines. Initially, a sample was randomly drawn from the population. During the actual data collection, the researchers had difficulty getting the responses from the randomly selected individuals due to internet connection and it was done amidst a pandemic. Instead, it took all responses from those who were available, have access to the internet, and could accomplish the google forms. The data were analyzed using Mean, Standard Deviation, T-test for independent sample, ANOVA and Post Hoc test. The results revealed that college students at the locale have a high level of self-concept in self-fulfilment, emotional adjustment, and honesty. Yet, they only had a moderate level of self-concept in autonomy. Further, there were significant differences in college students’ autonomy and honesty in terms of age and gender. Furthermore, there were significant differences in their emotional adjustment and self-fulfilment as to their ethnicity. The results have implications for instruction, administration, guidance services, and future research.


2019 ◽  
Vol 75 (3) ◽  
Author(s):  
Jaco Gericke

Recourse to auxiliary disciplines has greatly contributed to the ways in which biblical scholars seek to elucidate various dimensions of meaning in textual constructions of dreams and dreaming in the Old Testament. The original contribution this article hopes to make to the ongoing research on associated oneirocritic topoi is to propose the so-called philosophy of dreaming as a potential dialogue partner to supplement already available perspectives within the multidisciplinary discussion. At present, there is no descriptive philosophical approach exclusively devoted to the identification and clarification of the folk-philosophical assumptions implicit in oneirocritic materials as conditions of their possibility. By way of comparative-philosophical commentary, the article features a brief introduction to the related research within Old Testament studies, an overview of the history and problems of the auxiliary subject, and an illustration of how the new approach might look when applied to texts involving ‘oneirophany’ (Gn 15:1–21, 20:3–6, 28:11–17 and 1 Ki 3:5–15). The study concludes with a few remarks on the limits of the proposal and suggestions for more extensive and in-depth future research in related and alternative areas.


Author(s):  
Harriet J. A. Teare ◽  
Megan Prictor ◽  
Jane Kaye

AbstractDynamic consent (DC) was originally developed in response to challenges to the informed consent process presented by participants agreeing to ‘future research’ in biobanking. In the past 12 years, it has been trialled in a number of different projects, and examined as a new approach for consent and to support patient engagement over time. There have been significant societal shifts during this time, namely in our reliance on digital tools and the use of social media, as well as a greater appreciation of the integral role of patients in biomedical research. This paper reflects on the development of DC to understand its importance in an age where digital health is becoming the norm and patients require greater oversight and control of how their data may be used in a range of settings. As well as looking back, it looks forwards to consider how DC could be further utilised to enhance the patient experience and address some of the inequalities caused by the digital divide in society.


2020 ◽  
Vol 2020 ◽  
pp. 1-14
Author(s):  
Tao Yin ◽  
Peihong Ma ◽  
Zilei Tian ◽  
Kunnan Xie ◽  
Zhaoxuan He ◽  
...  

The effects of acupuncture facilitating neural plasticity for treating diseases have been identified by clinical and experimental studies. In the last two decades, the application of neuroimaging techniques in acupuncture research provided visualized evidence for acupuncture promoting neuroplasticity. Recently, the integration of machine learning (ML) and neuroimaging techniques becomes a focus in neuroscience and brings a new and promising approach to understand the facilitation of acupuncture on neuroplasticity at the individual level. This review is aimed at providing an overview of this rapidly growing field by introducing the commonly used ML algorithms in neuroimaging studies briefly and analyzing the characteristics of the acupuncture studies based on ML and neuroimaging, so as to provide references for future research.


Author(s):  
Jose Anson ◽  
Olivier Cadot ◽  
Marcelo Olarreaga

AbstractThis paper provides a new approach to the evaluation of pre-shipment inspection (PSI) programs as ways of improving tariff-revenue collection and reducing fraud when customs administrations are corrupt. We build a model highlighting the contribution of private surveillance firms to the generation of information and describing how incentives for underinvoicing and collusive behaviour between importers and customs are affected by the introduction of PSI. It is shown theoretically that the introduction of PSI has an ambiguous effect on the level of fraud. Empirically, our econometric results suggest that the introduction of PSI services increased underinvoicing in Argentina and Indonesia, and reduced it in the Philippines.


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