scholarly journals Classifier Chains: A Review and Perspectives

2021 ◽  
Vol 70 ◽  
pp. 683-718
Author(s):  
Jesse Read ◽  
Bernhard Pfahringer ◽  
Geoffrey Holmes ◽  
Eibe Frank
Keyword(s):  
Recent Decade ◽  
Underlying Mechanism ◽  
Learning Problems ◽  
Future Research ◽  
Research Themes ◽  
The Family ◽  
Empirical Performance ◽  
Key Issues ◽  
Binary Classifiers ◽  
Classifier Chains

The family of methods collectively known as classifier chains has become a popular approach to multi-label learning problems. This approach involves chaining together off-the-shelf binary classifiers in a directed structure, such that individual label predictions become features for other classifiers. Such methods have proved flexible and effective and have obtained state-of-the-art empirical performance across many datasets and multi-label evaluation metrics. This performance led to further studies of the underlying mechanism and efficacy, and investigation into how it could be improved. In the recent decade, numerous studies have explored the theoretical underpinnings of classifier chains, and many improvements have been made to the training and inference procedures, such that this method remains among the best options for multi-label learning. Given this past and ongoing interest, which covers a broad range of applications and research themes, the goal of this work is to provide a review of classifier chains, a survey of the techniques and extensions provided in the literature, as well as perspectives for this approach in the domain of multi-label classification in the future. We conclude positively, with a number of recommendations for researchers and practitioners, as well as outlining key issues for future research.

Collaborative writing in L2 classrooms: A research agenda

2021 ◽  
pp. 1-19
Author(s):  
Mimi Li ◽  
Meixiu Zhang
Keyword(s):  
Language Learning ◽  
Research Agenda ◽  
Collaborative Writing ◽  
Recent Decade ◽  
Future Research ◽  
Assessment Practice ◽  
Theoretical Frameworks ◽  
Research Themes ◽  
Research Gap ◽  
Practice Development

Abstract Research on second language (L2) collaborative writing (CW) has proliferated over the recent decade and will continue to bloom due to the changing landscape of writing and learning in the digital age. This article provides a research agenda on CW in L2 classrooms. We illustrate six research themes for future research inquiry by pointing out the research gap, following a brief review of theoretical frameworks and existing empirical efforts on CW. We then expound on six specific research tasks that we deem to be pressing for this domain to progress, including more attention to multimodal CW, expanded frameworks for analyzing peer interaction and writing products, deployment of underused research techniques and improved research practice, development of CW assessment practice, as well as the inquiry of practitioners’ input on CW. We hope to provide guidance for future research endeavors by identifying avenues of investigations on CW and meanwhile contribute to the trajectory of vibrant research on L2 writing and language learning.

Families and pain

2013 ◽  
pp. 111-118
Author(s):  
Kathryn A. Birnie ◽  
Katelynn E. Boerner ◽  
Christine T. Chambers
Keyword(s):  
Critical Role ◽  
Theoretical Models ◽  
Future Research ◽  
Illustrative Case ◽  
Comprehensive Review ◽  
Case Examples ◽  
Research Themes ◽  
The Family ◽  
Pain Experiences

The family has long been acknowledged as an important social context where children learn about and receive support for their pain. When a child is in pain, it is the family who is responsible for the initial pain assessment and seeking appropriate evaluation and care. Families may inadvertently encourage the expression of pain and play a critical role in influencing their children’s ability to cope with pain, both positively and negatively. Having a child in pain can also pose significant personal, familial, and economic strains. Therefore, consideration of the family is absolutely critical in the understanding of factors involved in children’s acute and chronic pain experiences (McGrath, 2008). A concentration of research has continued since the last comprehensive review on the topic was published (Chambers, 2003). This chapter considers relevant theoretical models and summarizes current major research themes regarding the role of the family in both acute and chronic paediatric pain. Two illustrative case examples are provided and key areas for future research are identified.

Families and pain

2021 ◽  
pp. 109-117
Author(s):  
Kristen S. Higgins ◽  
Christine T. Chambers ◽  
Kathryn A. Birnie ◽  
Katelynn E. Boerner
Keyword(s):  
Psychological Symptoms ◽  
Critical Role ◽  
Theoretical Models ◽  
Future Research ◽  
Parent Perspective ◽  
Case Examples ◽  
Experienced Pain ◽  
Research Themes ◽  
The Family ◽  
Children's Pain

The family has long been acknowledged as an important social context where children learn and receive support for experienced pain. When a child is in pain, the family is responsible for identifying pain and seeking appropriate evaluation and care. Families’ responses may inadvertently encourage or discourage the expression of pain and play a critical role in influencing children’s ability to cope with pain, both positively and negatively. Having a child in pain can pose significant personal, familial, and economic strains to parents, and parents’ health can impact pain and psychological symptoms in their offspring. Therefore, consideration of the family is critical in understanding children’s pain. This chapter describes relevant theoretical models and summarizes current major research themes regarding the role of the family in both acute and chronic pediatric pain. Two illustrative case examples and a parent perspective are provided and key areas for future research are identified.

Parenting, Religion, and Moral Development

2019 ◽  
pp. 178-196
Author(s):  
Sam A. Hardy ◽  
David C. Dollahite ◽  
Chayce R. Baldwin
Keyword(s):  
Moral Development ◽  
Parenting Styles ◽  
Family Relationships ◽  
Future Research ◽  
Adolescent Religiosity ◽  
Faith Traditions ◽  
The Family ◽  
Role Of Religion

The purpose of this chapter is to review research on the role of religion in moral development within the family. We first present a model of the processes involved. Parent or family religiosity is the most distal predictor and affects moral development through its influence on parenting as well as child or adolescent religiosity. Additionally, parenting affects moral development directly, but also through its influence on child or adolescent religiosity. In other words, parent or family religiosity dynamically interconnects with parenting styles and practices, and with family relationships, and these in turn influence moral development directly as well as through child or adolescent religiosity. We also discuss how these processes might vary across faith traditions and cultures, and point to directions for future research.

Flavor halos andconsumer perceptions offood healthfulness

2019 ◽  
Vol 53 (4) ◽  
pp. 685-707
Author(s):  
Nguyen Pham ◽  
Maureen Morrin ◽  
Melissa G. Bublitz
Keyword(s):  
Cognitive Biases ◽  
Underlying Mechanism ◽  
Repeated Exposure ◽  
Future Research ◽  
Medicinal Products ◽  
Dietary Compliance ◽  
Health Goals ◽  
Health Related ◽  
Prevalence Of Obesity ◽  
Cough Syrup

Purpose This paper aims to examine how repeated exposure to health-related products that contain flavors (e.g. cherry-flavored cough syrup) create “flavor halos” that can bias perceptions about the healthfulness of foods that contain the same flavors (e.g. cherry-flavored cheesecake). Design/methodology/approach Six experiments, using both between- and within-subjects designs, explore the effects of flavor halos in hypothetical and actual consumption settings. They test the underlying mechanism, rule out competing explanations and identify an opportunity to correct the cognitive biases created by flavor halos. Findings Flavor halos can be created via repeated exposure to flavored medicinal products in the marketplace. These flavor halos bias dieters’ judgments about the healthfulness of vice foods containing such flavors. Dieters are motivated toward a directional conclusion about food healthfulness to mediate the guilt associated with consuming indulgent products. Providing dieters with corrective information mitigates these effects. Research limitations/implications The authors examine one way flavor halos are created –via repeated exposure to flavored medicinal products. Future research should explore other ways flavor halos are created and other ways to mitigate their effects. Practical implications Considering the prevalence of obesity, organizations striving to help consumers pursue health goals (e.g. weight watchers) can use flavors to improve dietary compliance. Health-care organizations can help consumers understand and correct the cognitive biases associated with flavor halos. Originality/value By identifying flavor halos, this work adds to the literature investigating how flavors influence consumers’ judgments about healthfulness. The results suggest dieters apply flavor halos as they engage in motivated reasoning to license their indulgent desires.

scholarly journals Thrombotic Thrombocytopenia after COVID-19 Vaccination: In Search of the Underlying Mechanism

Vaccines ◽  
2021 ◽  
Vol 9 (6) ◽  
pp. 559
Author(s):  
Piotr Rzymski ◽  
Bartłomiej Perek ◽  
Robert Flisiak
Keyword(s):  
Direct Interaction ◽  
Underlying Mechanism ◽  
The United States ◽  
Cross Reactivity ◽  
Spike Protein ◽  
Vaccine Hesitancy ◽  
Future Research ◽  
Platelet Factor ◽  
Precautionary Measures ◽  
Adenoviral Proteins

The rollout of COVID-19 vaccines brings hope for successful pandemic mitigation and getting the transmission of SARS-CoV-2 under control. The vaccines authorized in Europe displayed a good safety profile in the clinical trials. However, during their post-authorization use, unusual thrombotic events associated with thrombocytopenia have rarely been reported for vector vaccines. This led to the temporary suspension of the AZD1222 vaccine (Oxford/AstraZeneca) in various European countries and the Ad26.COV2 vaccine (Janssen/Johnson&Johnson) in the United States, with regulatory bodies launching investigations into potential causal associations. The thromboembolic reactions were also rarely reported after mRNA vaccines. The exact cause of these adverse effects remains to be elucidated. The present paper outlines the hypotheses on the mechanisms behind the very rare thrombotic thrombocytopenia reported after the COVID-19 vaccination, along with currently existing evidence and future research prospects. The following are discussed: (i) the role of antibodies against platelet factor 4 (PF4), (ii) the direct interaction between adenoviral vector and platelets, (iii) the cross-reactivity of antibodies against SARS-CoV-2 spike protein with PF4, (iv) cross-reactivity of anti-adenovirus antibodies and PF4, (v) interaction between spike protein and platelets, (vi) the platelet expression of spike protein and subsequent immune response, and (vii) the platelet expression of other adenoviral proteins and subsequent reactions. It is also plausible that thrombotic thrombocytopenia after the COVID-19 vaccine is multifactorial. The elucidation of the causes of these adverse events is pivotal in taking precautionary measures and managing vaccine hesitancy. It needs to be stressed, however, that the reported cases are currently sporadic and that the benefits of COVID-19 vaccines vastly outweigh their potential risks.

scholarly journals Tourism Network in Urban Agglomerated Destinations: Implications for Sustainable Tourism Destination Development through a Critical Literature Review

2020 ◽  
Vol 13 (1) ◽  
pp. 285
Author(s):  
Huanhuan Hua ◽  
Amare Wondirad
Keyword(s):  
Sustainable Development ◽  
Urban Tourism ◽  
Urban Agglomeration ◽  
Future Research ◽  
Tourism Destination ◽  
Research Fields ◽  
Research Themes ◽  
Research Architecture ◽  
Critical Literature

This study analyzes tourism network in urban agglomerated destinations and puts forth implications for future sustainable development through a critical and extensive review of related literature. First of all, with a bibliometric analysis of 2670 selected articles from three research fields of urban tourism, urban agglomeration tourism and tourism destination network, we analyzed their respective research themes and classified them accordingly. Then, the study further investigates the role of tourism network in urban agglomerated destinations by identifying the differences and connections between urban agglomeration tourism and urban tourism. Finally, a basic architecture is established for the study of tourism networks in urban agglomerated destinations context. Study findings highlight that urban agglomeration tourism emphasizes the interconnectivity and social network relationships. However, research on the destination network of urban agglomerations is limited, especially from the tourism development perspectives. Therefore, the evolution process, structural effects, determinants and dynamic mechanisms of the tourism network in urban agglomerated destination are among the opportunities for future research. Moreover, the research architecture shows that the network relationship emerges as a new direction for the study of urban agglomeration system to better integrate and harness destinations’ resources and thereby promote sustainable development in urban agglomerated areas.

Marital Satisfaction of Portuguese Families in Times of Social Lockdown

2021 ◽  
pp. 106648072110098
Author(s):  
Carla Sílvia Fernandes ◽  
Bruno Magalhães ◽  
Sílvia Silva ◽  
Beatriz Edra
Keyword(s):  
Marital Satisfaction ◽  
Exploratory Study ◽  
Social Economic ◽  
Future Research ◽  
Marital Relations ◽  
The Social ◽  
The Family ◽  
Convenience Sampling ◽  
Global Threat ◽  
The Impact

The COVID-19 pandemic represents a global threat and crisis situation, and its wide-reaching impact has also affected marital satisfaction. Dysfunction of the marital system puts the survival of the family unit at risk. This research aimed to determine the level of marital satisfaction of Portuguese families during the social lockdown and the association between the variables under study. A descriptive, exploratory study was conducted. During the social lockdown, 276 people of Portuguese nationality and residing in Portugal were recruited using nonprobabilistic convenience sampling. Marital satisfaction in the pandemic phase showed low values that may be associated with the social, economic, and political context experienced by the pandemic situation. Future research must be carried out in order to identify, prevent, and intervene in situations of violence. In addition, future research should explore not only marital satisfaction during the current pandemic but a more systemic assessment of marital relations during crises, expanding the impact of marital satisfaction in family functioning.

scholarly journals Antitrypanosomal and Antileishmanial Activity of Chalcones and Flavanones from Polygonum salicifolium

Pathogens ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 175
Author(s):  
Ahmed M. Zheoat ◽  
Samya Alenezi ◽  
Ehab Kotb Elmahallawy ◽  
Marzuq A. Ungogo ◽  
Ali H. Alghamdi ◽  
...  
Keyword(s):  
Human Cell Line ◽  
Antileishmanial Activity ◽  
Cross Resistance ◽  
Future Research ◽  
Parasitic Diseases ◽  
Leishmania Mexicana ◽  
First Line ◽  
Trypanosoma Brucei Brucei ◽  
The Family

Trypanosomiasis and leishmaniasis are a group of neglected parasitic diseases caused by several species of parasites belonging to the family Trypansomatida. The present study investigated the antitrypanosomal and antileishmanial activity of chalcones and flavanones from Polygonum salicifolium, which grows in the wetlands of Iraq. The phytochemical evaluation of the plant yielded two chalcones, 2′,4′-dimethoxy-6′-hydroxychalcone and 2′,5′-dimethoxy-4′,6′-dihydroxychalcone, and two flavanones, 5,7-dimethoxyflavanone and 5,8-dimethoxy-7-hydroxyflavanone. The chalcones showed a good antitrypanosomal and antileishmanial activity while the flavanones were inactive. The EC50 values for 2′,4′-dimethoxy-6′-hydroxychalcone against Trypanosoma brucei brucei (0.5 μg/mL), T. congolense (2.5 μg/mL), and Leishmania mexicana (5.2 μg/mL) indicated it was the most active of the compounds. None of the compounds displayed any toxicity against a human cell line, even at 100 µg/mL, or cross-resistance with first line clinical trypanocides, such as diamidines and melaminophenyl arsenicals. Taken together, our study provides significant data in relation to the activity of chalcones and flavanones from P. salicifolium against both parasites in vitro. Further future research is suggested in order to investigate the mode of action of the extracted chalcones against the parasites.

Effects of social attachment on social media continuous usage intention: The mediating role of affective commitment

2020 ◽  
pp. 1-13
Author(s):  
Maosheng Yang ◽  
Shangui Hu ◽  
Bagna Essohanam Kpandika ◽  
Lei Liu
Keyword(s):  
Social Media ◽  
Structural Equation ◽  
Affective Commitment ◽  
Underlying Mechanism ◽  
Equation Model ◽  
Three Dimensions ◽  
Future Research ◽  
Social Attachment ◽  
Mediating Role ◽  
Continuous Usage Intention

BACKGROUND: Social attachment has been identified as a key antecedent motivating users’ social media involvement. However, there is a scarcity of research investigating whether and how three dimensions of social attachment exert impacts on users’ continuous usage intention of social media. OBJECTIVE: Based on structural equation model analysis, the current research clarifies the relationships between social attachment, affective commitment and social media continuous usage intention, which unveils the underlying mechanism through which three dimensions of social attachment influence users’ continuous usage intention of social media. METHODS: A survey was conducted with 536 informative responses obtained from TikTok public users for hypothesis testing analysis. RESULTS: Results indicate that three dimensions of social attachment (social connections, social dependence and social identity) are all positively related to users’ continuous usage intention of social media. Affective commitment partially mediates the relationship between social attachment and users’ continuous usage intention of social media. CONCLUSIONS: The current research makes an in-depth study about the underlying mechanism whereby social attachment exerts impacts on social media continuous usage intentionand provides several managerial and theoretical implications. Future research directions are discussed as well.

Sign in / Sign up

Export Citation Format

Share Document