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1.
J Hazard Mater ; 476: 135074, 2024 Jun 29.
Artigo em Inglês | MEDLINE | ID: mdl-38954855

RESUMO

Sulfamethoxazole (SMX) is frequently detected in wastewater where anammox applications are promising. While it has been demonstrated that anammox consortia can adapt to SMX stress, the underlying community adaptation strategy has not yet been fully addressed. Therefore, in this study, we initially ascertained anammox consortia's ability to co-metabolize SMX in batch tests. Then, a 200-day domestication process of anammox consortia under SMX stress was carried out with community variations and transcriptional activities monitored by metagenomic and metatranscriptomic sequencing techniques. Despite the initial drop to 41.88 %, the nitrogen removal efficiency of the anammox consortia rebounded to 84.64 % post-domestication under 5 mg/L SMX. Meanwhile, a 4.85-fold accumulation of antibiotic resistance genes (ARGs) under SMX stress was observed as compared to the control group. Interestingly, the anammox consortia may unlock the SMX-inhibited folate synthesis pathway through a novel interspecies cooperation triangle among Nitrospira (NAA), Desulfobacillus denitrificans (DSS1), and the core anammox population Candidatus Brocadia sinica (AMX1), in which the modified dihydropteroate synthase (encoded by sul1) of NAA reconnected the symbiotic cooperation between AMX1 and DSS1. Overall, this study provides a new model for the adaptation strategies of anammox consortia to SMX stress.

2.
Adv Protein Chem Struct Biol ; 141: 563-650, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38960486

RESUMO

Cytoskeletal motor proteins are biological nanomachines that convert chemical energy into mechanical work to carry out various functions such as cell division, cell motility, cargo transport, muscle contraction, beating of cilia and flagella, and ciliogenesis. Most of these processes are driven by the collective operation of several motors in the crowded viscous intracellular environment. Imaging and manipulation of the motors with powerful experimental probes have been complemented by mathematical analysis and computer simulations of the corresponding theoretical models. In this article, we illustrate some of the key theoretical approaches used to understand how coordination, cooperation and competition of multiple motors in the crowded intra-cellular environment drive the processes that are essential for biological function of a cell. In spite of the focus on theory, experimentalists will also find this article as an useful summary of the progress made so far in understanding multiple motor systems.


Assuntos
Simulação por Computador , Proteínas Motores Moleculares , Proteínas Motores Moleculares/metabolismo , Proteínas Motores Moleculares/química , Humanos , Animais , Modelos Biológicos
3.
ISME Commun ; 4(1): ycae077, 2024 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-38962494

RESUMO

Staphylococcus aureus (Sa) and Acinetobacter baumannii (Ab) are frequently co-isolated from polymicrobial infections that are severe and refractory to therapy. Here, we apply a combination of wet-lab experiments and in silico modeling to unveil the intricate nature of the Ab/Sa interaction using both, representative laboratory strains and strains co-isolated from clinical samples. This comprehensive methodology allowed uncovering Sa's capability to exert a partial interference on Ab by the expression of phenol-soluble modulins. In addition, we observed a cross-feeding mechanism by which Sa supports the growth of Ab by providing acetoin as an alternative carbon source. This study is the first to dissect the Ab/Sa interaction dynamics wherein competitive and cooperative strategies can intertwine. Through our findings, we illuminate the ecological mechanisms supporting their coexistence in the context of polymicrobial infections. Our research not only enriches our understanding but also opens doors to potential therapeutic avenues in managing these challenging infections.

4.
Math Med Biol ; 2024 Jul 07.
Artigo em Inglês | MEDLINE | ID: mdl-38970827

RESUMO

We discuss the mathematical modelling of two of the main mechanisms that pushed forward the emergence of multicellularity: phenotype divergence in cell differentiation and between-cell cooperation. In line with the atavistic theory of cancer, this disease being specific of multicellular animals, we set special emphasis on how both mechanisms appear to be reversed, however not totally impaired, rather hijacked, in tumour cell populations. Two settings are considered: the completely innovating, tinkering, situation of the emergence of multicellularity in the evolution of species, which we assume to be constrained by external pressure on the cell populations, and the completely planned-in the body plan-situation of the physiological construction of a developing multicellular animal from the zygote, or of bet hedging in tumours, assumed to be of clonal formation, although the body plan is largely-but not completely-lost in its constituting cells. We show how cancer impacts these two settings and we sketch mathematical models for them. We present here our contribution to the question at stake with a background from biology, from mathematics and from philosophy of science.

5.
J Math Biol ; 89(2): 22, 2024 Jul 01.
Artigo em Inglês | MEDLINE | ID: mdl-38951257

RESUMO

Group defense in prey and hunting cooperation in predators are two important ecological phenomena and can occur concurrently. In this article, we consider cooperative hunting in generalist predators and group defense in prey under a mathematical framework to comprehend the enormous diversity the model could capture. To do so, we consider a modified Holling-Tanner model where we implement Holling type IV functional response to characterize grazing pattern of predators where prey species exhibit group defense. Additionally, we allow a modification in the attack rate of predators to quantify the hunting cooperation among them. The model admits three boundary equilibria and up to three coexistence equilibrium points. The geometry of the nontrivial prey and predator nullclines and thus the number of coexistence equilibria primarily depends on a specific threshold of the availability of alternative food for predators. We use linear stability analysis to determine the types of hyperbolic equilibrium points and characterize the non-hyperbolic equilibrium points through normal form and center manifold theory. Change in the model parameters leading to the occurrences of a series of local bifurcations from non-hyperbolic equilibrium points, namely, transcritical, saddle-node, Hopf, cusp and Bogdanov-Takens bifurcation; there are also occurrences of global bifurcations such as homoclinic bifurcation and saddle-node bifurcation of limit cycles. We observe two interesting closed 'bubble' form induced by global bifurcations due to change in the strength of hunting cooperation and the availability of alternative food for predators. A three dimensional bifurcation diagram, concerning the original system parameters, captures how the alternation in model formulation induces gradual changes in the bifurcation scenarios. Our model highlights the stabilizing effects of group or gregarious behaviour in both prey and predator, hence supporting the predator-herbivore regulation hypothesis. Additionally, our model highlights the occurrence of "saltatory equilibria" in ecological systems and capture the dynamics observed for lion-herbivore interactions.


Assuntos
Ecossistema , Cadeia Alimentar , Conceitos Matemáticos , Modelos Biológicos , Dinâmica Populacional , Comportamento Predatório , Animais , Dinâmica Populacional/estatística & dados numéricos , Comportamento Cooperativo , Simulação por Computador , Herbivoria , Modelos Lineares
6.
Psychophysiology ; : e14638, 2024 Jul 01.
Artigo em Inglês | MEDLINE | ID: mdl-38951737

RESUMO

Cooperation, as a mutual collaboration, is a defining feature of human social life. Individual characteristics can influence cooperation. Recent studies have shown a quadratic relationship between cardiac vagal tone (CVT), an index of self-regulation, and prosocial behaviors. Individual differences in cooperation might also vary as a function of people's environmental sensitivity (ES), i.e., may be influenced by individual differences in the perception and processing of inner and external stimuli. We tested the direct and interactive effect of CVT and ES on cooperative behaviors in two independent samples. We measured heart rate and engagement in cooperative acts in 80 young adults (M = 23.61; SD = 1.60) who were also asked to self-report on ES. We found an inverted-U relationship between CVT and cooperative behaviors. ES, on the other hand, did not predict differences in cooperative behaviors but moderated the relationships between CVT and cooperation, although the magnitude of this result was small. Specifically, only among individuals with higher ES cooperative behaviors change as a function of CVT. Highly sensitive individuals with lower or higher CVT, were less cooperative than low sensitive ones. Subsequently, we replicated the same study design in a second sample of 88 undergraduate students (M = 23.69; SD = 4.91). Once again, we found evidence supporting the presence of an inverted-U relationship between CVT and cooperative behaviors, and we also found that ES moderated the relationships between the quadratic CVT term and cooperation.

7.
World Neurosurg ; 2024 Jul 04.
Artigo em Inglês | MEDLINE | ID: mdl-38971493

RESUMO

South Asia, consisting of Bangladesh, Bhutan, India, Maldives, Nepal, Pakistan, and Sri Lanka spreads between the Himalayan base and the Indian ocean, and shares identical geophysical characteristics. With the inclusion of its newest member Afghanistan, these 8 member-nations of the South Asian Association for Regional Cooperation (SAARC) share more or less a homogenous geographical, political, and historical background and cultural heritage, with a significant role in shaping the world. This densely populated area is home to around a quarter of the world's total population. From the ancient ages, the neurosurgical practice has paced relentlessly and in the last 100 years, it has reached its zenith. With modern advancements, neurosurgery has developed in its diagnostic and treatment modalities along with facilities for training and education. Despite falling behind owing to economic, educational, and geopolitical constraints the pioneers of the SAARC region have established the fields of neurosurgery in their respective countries with command. No constraint could stop them from educating and training young physicians to make competent neurosurgeons to evolve the field of neurosurgery in their countries. Their firm determination and hard work paved the way to keep this field striving and thriving, to serve a substantial volume of the world population with their neurosurgical insight and skill. However, this region needs to go a long way as the number of neurosurgeons and facilities is still insufficient. This can be achieved with the guidance and collaboration among the neurosurgeons of the SAARC region as the youth here are talented and hard-working.

8.
Cad. Ibero-Am. Direito Sanit. (Online) ; 13(2): 11-18, abr.-jun.2024.
Artigo em Português | LILACS | ID: biblio-1560915

RESUMO

Objetivo: compreender a participação da IA nos diagnósticos da saúde moderna e definir limites para sua aplicação. Metodologia: Revisão integrativa da literatura. A busca dos estudos se deu nas bases de dados LILACS, MEDLINE e SCIELO e foram selecionados artigos científicos, sem recorte temporal e de idioma. Resultados: A inteligência artificial impacta a medicina em três níveis: otimiza a interpretação de imagens para os médicos, aprimora o fluxo de trabalho reduzindo potenciais erros para os sistemas de saúde e capacita os pacientes a processarem seus próprios dados para promover a saúde. Contudo, é necessária atenção aos dados gerados, pois podem desencadear erros em cascata e expor informações sensíveis dos usuários do sistema de saúde. Conclusão: Atribuir à IA a responsabilidade de escolhas e funções desempenhadas por humanos é intrinsecamente perigoso, apesar de sua contribuição inegável nos processos diagnósticos. Sugere-se a realização de pesquisas robustas para compreender plenamente o impacto dessa nova era tecnológica proporcionada pela IA na área da saúde.


Objective: To understand the role of AI in modern healthcare diagnostics and define boundaries for its application. Methodology:Integrative literature review. Studies were searched in the LILACS, MEDLINE, and SCIELO databases, selecting scientific articles without temporal or language restrictions. Results: Artificial intelligence impacts medicine at three levels: it optimizes image interpretation for physicians, enhances workflow by reducing potential errors for healthcare systems, and empowers patients to process their own data to promote health. However, attention is required regarding the generated data, as it may trigger cascading errors and expose sensitive information of healthcare system users. Conclusion: Assigning AI, the responsibility of choices and functions performed by humans is inherently dangerous, despite its undeniable contribution to diagnostic processes. Robust research is suggested to fully understand the impact of this new technological era provided by AI in healthcare.


Objetivo: Comprender la participación de la IA en los diagnósticos de la salud moderna y definir límites para su aplicación. Metodología:Revisión integrativa de la literatura. Los estudios se buscaron en las bases de datos LILACS, MEDLINE y SCIELO, seleccionando artículos científicos sin restricciones temporales ni lingüísticas. Resultados: La inteligencia artificial impacta la medicina en tres niveles: optimiza la interpretación de imágenes para los médicos, mejora el flujo de trabajo al reducir errores potenciales para los sistemas de salud y capacita a los pacientes para procesar sus propios datos y promover la salud. Sin embargo, se requiere atención respecto a los datos generados, ya que pueden desencadenar errores en cascada y exponer información sensible de los usuarios del sistema de salud. Conclusión: Asignar a la IA la responsabilidad de decisiones y funciones realizadas por humanos es intrínsecamente peligroso, apesar de su contribución innegable a los procesos de diagnóstico. Se sugiere realizar investigaciones sólidas para comprender completamente el impacto de esta nueva era tecnológica proporcionada por la IA en la salud.


Assuntos
Direito Sanitário
9.
Cad. Ibero-Am. Direito Sanit. (Online) ; 13(2): 19-28, abr.-jun.2024.
Artigo em Português | LILACS | ID: biblio-1560923

RESUMO

Objetivos: analisar se a Recomendação Geral n.º24, sobre saúde da mulher, amplia ou constrói interpretações para os Estados Partes da Convenção para a Eliminação de todas as Formas de Discriminação contra a Mulher. Metodologia: foi realizada uma pesquisa documental e bibliográfica para coletar dados e revisar criticamente documentos internacionais e literatura especializada. Os resultados foram analisados por meio da revisão crítico-narrativa. Resultados: a Convenção abrange direitos da mulher, incluindo saúde, e o Comitê da Convenção sobre a eliminação de todas as formas de discriminação contra as mulheres emite recomendações gerais para orientar sua implementação pelos Estados Partes. A Recomendação Geraln.º24 amplia as recomendações originais, abordando questões como saúde sexual, violência de gênero e participação na tomada de decisões. Conclusões: a interpretação política da Convenção, conforme preconizado por Kelsen, permite observar as necessidades e o contexto político dos Estados-parte. A Recomendação Geraln.º24 amplia as recomendações, refletindo a necessidade de adaptação das políticas públicas às mudanças globais e às necessidades das mulheres.


Objectives: This study examines whether General Recommendation (GR) No. 24, on women's health, broadens or constructs interpretations for the State parties of the Convention on the Elimination of All Forms of Discrimination against Women. Methodology: A documentary and bibliographical research was conducted to collect data and critically review international documents and specialized literature. The results were analyzed through critical-narrative review. Results: The Convention covers women's rights, including health, and the Committee on the Elimination of Discrimination against Women issues general recommendations to guide its implementation by State parties. GR No. 24 expands the original recommendations, addressing issues such as sexual health, gender-based violence, and participation in decision-making. Conclusions: The political interpretation of the Convention, as advocated by Kelsen, enables the observation of the needs and political context of the State parties. GR No. 24 expands the recommendations, reflecting the need to adapt public policies to global changes and women's needs.


Objetivos: Este estudio analiza si la Recomendación General (RG) n. 24, sobre la salud de la mujer, amplía o construye interpretaciones para los Estados Partes de la Convención para la Eliminación de todas las Formas de Discriminación contra la Mujer. Metodología: Se realizó una investigación documental y bibliográfica para recopilar datos y revisar críticamente documentos internacionales y literatura especializada. Los resultados fueron analizados mediante la revisión crítico-narrativa. Resultados: La Convención abarca los derechos de las mujeres, incluida la salud, y el Comité de la Convención sobre la eliminación de todas las formas de discriminación contra la mujer emite recomendaciones generales para guiar su implementación por parte de los Estados-partes. La RG n. 24 amplía las recomendaciones originales, abordando cuestiones como la salud sexual, la violencia de género y la participación en la toma de decisiones. Conclusiones: La interpretación política de la Convención, como preconiza Kelsen, permite la observación de las necesidades y el contexto político de los Estados Partes. La RG n. 24 amplía las recomendaciones, reflejando la necesidad de adaptar las políticas públicas a los cambios globales y a las necesidades de las mujeres.


Assuntos
Direito Sanitário
10.
BMC Nurs ; 23(1): 437, 2024 Jun 26.
Artigo em Inglês | MEDLINE | ID: mdl-38926867

RESUMO

BACKGROUND: Despite the importance of collaboration and communication in global health, existing educational approaches often rely on traditional one-way instruction from instructor to student. Therefore, this study aimed to evaluate the effectiveness of a newly developed undergraduate curriculum on global health in enhancing nursing students' competencies in global health and communication, problem-solving, and self-directed learning skills. METHODS: A 15-week course "Global Health and Nursing" was designed for undergraduate nursing students, and a collaborative project-based learning method was used. Study participants were undergraduate nursing students enrolled in the course. The study was a multi-method study and included quantitative and qualitative components. It employed a one-group pretest-posttest design to quantitatively assess the impact of the curriculum. Additionally, student experiences with the learning process were qualitatively explored through a focus group interview. A total of 28 students participated in this study, and 5 of them participated in the focus group interview. RESULTS: The collaborative project-based learning method significantly improved global health competency (t = - 10.646, df = 22, p < 0.001), with a large effect size. It also improved communication skills (t = - 2.649, df = 22, p = 0.015), problem-solving skills (t = - 3.453, df = 22, p = 0.002), and self-directed learning skills (t = - 2.375, df = 22, p = 0.027). Three themes were found through the focus group interview: (a) Promoting global health competency; (b) Fostering life skills through collaborative projects; and (c) Recommendations for future classes. The focus group interview indicated that overall, the study participants were satisfied with the collaborative project-based method for global health education. CONCLUSIONS: This study confirms that project-based learning significantly boosts the competencies and skills of students, recommending its broader adoption in nursing education. Nursing instructors should consider adopting this teaching approach for global health education at the undergraduate level. Future studies may employ a longitudinal design to assess the prolonged effects of the collaborative project-based learning approach, particularly focusing on the long-term retention of skills and the broader applicability of this model across different educational settings.

11.
Rev Infirm ; 73(302): 33-34, 2024.
Artigo em Francês | MEDLINE | ID: mdl-38901910

RESUMO

Cooperation protocols enable healthcare professionals to work together to meet patients' needs. One of the challenges of these protocols is to offer a wider range of care by reducing the time taken to access care, while also optimising the patient's pathway. Four cooperation protocols have been validated for emergency services.


Assuntos
Protocolos Clínicos , Serviço Hospitalar de Emergência , Humanos , Serviço Hospitalar de Emergência/organização & administração , Protocolos Clínicos/normas , Comportamento Cooperativo , Equipe de Assistência ao Paciente/organização & administração
12.
Int J Nurs Stud ; 157: 104812, 2024 May 20.
Artigo em Inglês | MEDLINE | ID: mdl-38861789

RESUMO

BACKGROUND: An inclusive workplace is where everyone is supported to thrive and succeed regardless of their background. Supportive working conditions and general self-efficacy have been found to be important for nurses' perceived competence and well-being at work, however, in the context of being a nurse in a new country, research is limited. Moreover, knowledge is lacking about whether different paths to a nursing license are related to nurses' perceived competence and well-being when working. OBJECTIVE: To examine determinants and experiences of nursing competence and well-being at work (thriving and stress) among internationally and domestically educated nurses. DESIGN: A longitudinal descriptive and correlational design with a mixed-methods convergent approach was used. METHODS: A longitudinal study was conducted between January 2019 and June 2022 with two groups of internationally educated nurses who had completed a bridging program or validation to obtain a Swedish nursing license and one group of domestically newly educated nurses. Data were collected on three occasions: Time1 at the end of the nursing licensure process (n = 402), Time2 after three months (n = 188), and Time3 after 12 months (n = 195). At Time3, 14 internationally educated nurses were also interviewed. Data were analyzed separately and then interpreted together. RESULTS: Multiple regression models showed that greater access to structural empowerment (B = 0.70, 95 % CI [0.31; 1.08]), better cooperation (B = 3.76, 95 % CI [1.44; 6.08]), and less criticism (B = 3.63, 95 % CI [1.29; 5.96]) were associated with higher self-rated competence at Time3, whereas the variable path to a nursing license was non-significant (R2 = 49.2 %). For well-being, greater access to structural empowerment (B = 0.07, 95 % CI [0.02; 0.12]), better cooperation (B = 0.36, 95 % CI [0.07; 0.66]) and being domestically educated (B = 0.53, 95 % CI [0.14; 0.92]) were associated with higher thriving at work (R2 = 25.8 %). For stress, greater access to structural empowerment (B = -0.06, 95 % CI [-0.09; -0.02]), better cooperation (B = -0.30, 95 % CI [-0.51; -0.10]), and less criticism (B = -0.28, 95 % CI [-0.46; -0.05]) were associated with having symptoms less frequently while being domestically educated was associated with having stress symptoms more often (B = 0.44, 95 % CI [0.07; 0.81]) (R2 = 43.3 %). Higher general self-efficacy at Time1 was associated with higher self-rated competence at Time2 (B = 4.76, 95 % CI [1.94; 7.59]). Quantitative findings concurred with findings from interviews with internationally educated nurses. However, qualitative findings also highlighted the importance of previous education, working experience, the new context, and communication abilities. CONCLUSIONS: Both quantitative and qualitative data showed that working conditions were important for nurses' self-rated competence and well-being at work. Although communication difficulties, previous education, and working experience were not statistically significant in the multiple regression models, in the interviews these factors emerged as important for internationally educated nurses' competence and well-being.

13.
Med Trop Sante Int ; 4(1)2024 03 31.
Artigo em Francês | MEDLINE | ID: mdl-38846128

RESUMO

Introduction: Surgical campaigns for thyroid surgery in low-income environments are very efficient, but there is little literature reporting results. These campaigns are complex due to multiple particularities: highly evolved cases, the need for professionals to travel or an obvious socio-cultural barrier influence towards the surgical act. We describe a surgical campaign in Cameroon to treat patients with goiter and issue some medical and sociocultural recommendations in view of our experience for its implementation with guarantees. Material and methods: An experienced group carried out an 11-day campaign at the Saint Martin de Porres Dominican Hospital, Yaounde, Cameroon. Demographic data, TSH values, surgery and complications after a 12-month follow-up were analyzed. Results: Thirty-eight patients with goiter were selected for the campaign and 32 patients (mean age, 40-years-old; 30 females) were operated. Bilateral goiter, as assessed with echography, was diagnosed in 13 patients (41%). Ten patients (31%) had a WHO grade II goiter (visible with the neck in a normal position). The surgical procedures were 18 unilateral thyroidectomy with isthmectomie, 13 total thyroidectomy, and 1 totalizing thyroidectomy, due to previous unilateral thyroidectomy (cancer recurrence). A pathological study in 13 patients (40%, extra cost 60 €) showed benign multinodular goiter/thyroid nodule (12 patients) and an extensive papillary carcinoma (one patient). Six months postoperatively, 3 patients had a slight dysphonia and one patient had persistent hypocalcemia. Follow-up was completed in all patients, either face to face (75%, 24 patients) or by phone (25%, 8 patients who failed to have a TSH test because of its cost, 23 €). Conclusions: Surgical campaigns to treat thyroid pathology can be carried out with guarantees if a series of important steps are followed: active participation of the patient's environment, thyroid ultrasound by the surgical team to decide which technique, intense awareness about monitoring and hormone replacement therapy, and the participation of local personnel for long-term follow-up.


Assuntos
Tireoidectomia , Humanos , Feminino , Camarões , Masculino , Adulto , Pessoa de Meia-Idade , Bócio/cirurgia , Recursos em Saúde , Adulto Jovem , Hospitais
14.
Front Psychol ; 15: 1382403, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38845774

RESUMO

From February to May 2022, the war in Ukraine prompted Poland to accommodate 3.37 million refugees from conflict zones, in addition to 850 thousand Ukrainian economic migrants already residing in the country. A substantial proportion of these refugees, primarily mothers with children, swiftly integrated into the Polish educational system, with some children commencing schooling within a week of their arrival. This influx significantly diversified the then predominantly monolingual landscape of Polish schools. Given the uniqueness of this situation and the fact that Poland has historically remained mono-national and monolingual for decades, Polish teachers suffered from a lack of preparedness, resources and expertise to effectively navigate their teaching practices in multilingual classes. To understand the specificity of this situation, taking especially into account the perspective of educators, we have designed a qualitative study drawing on focus group and individual interview reports. We were particularly interested in determining how teachers' agency was activated in times of crisis. The findings reveal how the newly-emerging linguistic and cultural heterogeneity is perceived by teachers, how it is manifested in school and home environments, and the extent to which possibilities for synergies exist between the two. The findings also highlight the fact that, despite teachers' inexperience and unpreparedness for the new educational context, they instantly responded to the challenges that emerged. This can be exemplified by teachers' collaboration in material design as well as the willingness to participate in courses sensitizing to migrant students' needs (e.g., linguistic, educational, or emotional ones).

15.
Proc Biol Sci ; 291(2025): 20232493, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38889792

RESUMO

Direct reciprocity is a mechanism for the evolution of cooperation in repeated social interactions. According to the literature, individuals naturally learn to adopt conditionally cooperative strategies if they have multiple encounters with their partner. Corresponding models have greatly facilitated our understanding of cooperation, yet they often make strong assumptions on how individuals remember and process payoff information. For example, when strategies are updated through social learning, it is commonly assumed that individuals compare their average payoffs. This would require them to compute (or remember) their payoffs against everyone else in the population. To understand how more realistic constraints influence direct reciprocity, we consider the evolution of conditional behaviours when individuals learn based on more recent experiences. Even in the most extreme case that they only take into account their very last interaction, we find that cooperation can still evolve. However, such individuals adopt less generous strategies, and they cooperate less often than in the classical setup with average payoffs. Interestingly, once individuals remember the payoffs of two or three recent interactions, cooperation rates quickly approach the classical limit. These findings contribute to a literature that explores which kind of cognitive capabilities are required for reciprocal cooperation. While our results suggest that some rudimentary form of payoff memory is necessary, it suffices to remember a few interactions.


Assuntos
Evolução Biológica , Comportamento Cooperativo , Memória , Animais , Humanos
16.
Infect Dis Poverty ; 13(1): 47, 2024 Jun 15.
Artigo em Inglês | MEDLINE | ID: mdl-38879557

RESUMO

Cooperation and networking are powerful tools in the combating against tropical diseases. Cooperation on a global scale is essential due to the transboundary nature of tropical diseases. Networking plays a pivotal role in facilitating such cooperation. Both cooperation and networking can foster innovation in disease control programmes. Collaborative research can lead to the development of new drugs and vaccines, while shared surveillance data can enable the early detection and control of disease epidemics. Therefore, consensus of cooperation and networking has been reached during the 7th Symposium on Surveillance-Response Systems Leading to Tropical Diseases Elimination, which reflected in the two documents, i.e., Consensus for Transboundary Tropical Diseases Control, and Action Consensus of the Network of WHO Collaborating Centres Related to NTDs. These documents will improve the efforts in the fighting against tropical diseases through collective actions to achieve the United Nations' Sustainable Development Goals (SDGs).


Assuntos
Erradicação de Doenças , Saúde Global , Cooperação Internacional , Medicina Tropical , Humanos , Medicina Tropical/métodos , Erradicação de Doenças/métodos , Organização Mundial da Saúde , Doenças Negligenciadas/prevenção & controle
17.
Front Psychol ; 15: 1380341, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38882517

RESUMO

Psychological research on norms has shown that norms are highly relevant for individuals' decision-making. Yet, there is so far little understanding of how norms change over time. Knowledge about how norms change may help better understanding their potential for as well as limitations in guiding decision-making and changing behavior. The present work investigated change in individuals' cooperation norms. As an indicator of different underlying processes of norm change, the temporal dynamics of different types of norms were examined. It was assumed that participants' social norms are adapted quickly whenever the social situation changes, while personal norms change more slowly and gradually, abstracting part of the situational learning in interaction with one's personality. In an experimental study, participants played a repeated prisoner's dilemma game with artificial co-players representing a predominantly cooperative or uncooperative social setting, depending on the experimental condition. The condition was expected to affect slow learning of personal norms. Additionally, the cooperativeness of the social setting was varied repeatedly within conditions, expected to result in fast changes in social norms. Participants' personal and social norms were assessed throughout the game. As predicted, the temporal dynamics differed between norms with social norms changing quickly and personal norms more slowly. Personal norms strongly predicted behavioral decision-making and were predicted by situational and personality factors. Potential qualitative differences of the underlying norm change processes are discussed.

18.
Front Psychol ; 15: 1390741, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38899125

RESUMO

The relative contribution of intuitive and reflective cognitive systems in cooperative decision making is a topic of hot debate. Research with adults suggests that intuition often favors cooperation, but these effects are contextually sensitive. Emerging evidence has shown that in many contexts children show a tendency toward intuitive cooperation, but research investigating these processes in children is sparse and has produced mixed findings. In the current study we investigated the influence of intuitive and reflective decision processes on children's fairness behavior by manipulating decision time. We tested (N = 158) pairs of children between 4 and 10 years of age from a rural community in Canada. Children's decisions to accept or reject allocations of candies were either made under time pressure or after a 10-s delay. We assessed the impact of decision time on children's aversion to inequitable distributions of resources by comparing their responses to equal allocations with either disadvantageous allocations or advantageous allocations. We found that children showed a greater age-related increase in advantageous inequity aversion when decisions were made under time pressure compared to when they were made after a delay. In contrast, we did not observe a significant impact of decision time on the development of disadvantageous inequity aversion. These findings suggest that intuitive decision processes may contribute to the development of fairness concerns in middle childhood.

19.
J Biol Dyn ; 18(1): 2366495, 2024 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-38899433

RESUMO

In this paper, we consider a stochastic two-species predator-prey system with modified Leslie-Gower. Meanwhile, we assume that hunting cooperation occurs in the predators. By using Itô formula and constructing a proper Lyapunov function, we first show that there is a unique global positive solution for any given positive initial value. Furthermore, based on Chebyshev inequality, the stochastic ultimate boundedness and stochastic permanence are discussed. Then, under some conditions, we prove the persistence in mean and extinction of system. Finally, we verify our results by numerical simulations.


Assuntos
Modelos Biológicos , Comportamento Predatório , Processos Estocásticos , Comportamento Predatório/fisiologia , Animais , Comportamento Cooperativo , Dinâmica Populacional , Simulação por Computador
20.
Front Psychol ; 15: 1303372, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38855310

RESUMO

Introduction: The Male Warrior Hypothesis (MWH) proposes that sex-specific selective pressures have promoted male cooperation with the ingroup members to outcompete rival groups. However, intergroup conflicts do not occur in isolation and the outcomes of previous competitions may influence group cooperativeness. Since this phenomenon is not well understood, we aimed to shed light on the effect of previous competition outcome on later cooperative behavior under intergroup conflicts. Based on the MWH, we hypothesized that repeated contests between groups could enhance ingroup cooperation, regardless of the outcome of the previous contest because status is at risk, but when competition is not present, participants would move to the symmetric equilibria. Methods: To test this hypothesis, we recruited 246 individuals organized in groups of 6 and measured cooperation using a threshold public good game over two rounds, manipulating the outcome in the first round to create groups of winners and losers. Results: Our results show that intergroup conflict scenarios promoted cooperation in both victory and defeat conditions, whereas, in the control scenario only losers increased their cooperation. Discussion: We argue that winners under the presence of an external threat may enhance in-group cooperation in order to assure their status; whereas, losers may be attempting to regain it.

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