Peer-to-peer Research Articles

General and healthcare-related HIV stigma among cisgender Brazilian women: the role of socioeconomic vulnerability

Background HIV-related stigma is associated with worse health outcomes and lower adherence to antiretroviral therapy. There is limited data on the stigma faced by Latin American cisgender women, although they are among the populations most affected by HIV. This study aims to provide insight into the Stigma Index Brazil, with the objective of estimating the prevalence of HIV-related stigma among cisgender women in Brazil and to investigate the role of low socioeconomic status in stigma experience. Methods This is a cross-sectional community-based study. A total of 30 people with HIV were trained to recruit participants from their peer networks; 1,768 people with HIV from all regions of Brazil participated in the study, of which 566 participants were cisgender women. We used the Stigma Index, an instrument that assesses global trends in HIV-related stigma from the perspective of people with HIV. Results Approximately 70% of participants reported some form of HIV-related stigma. The most prevalent forms were discriminatory comments or gossiping (51.26%) and verbal harassment (30.99%). More than 20% experienced any health care related HIV-stigma in the last 12 months, the most frequent being the avoidance of physical contact (10.02%). Women in social vulnerability faced more stigma compared to the group without social vulnerability, both in general contexts (75.79% vs 64.32%; χ2 = 8.67, p < 0.05) and in healthcare contexts (24.12% vs 16.02%; χ2 = 4.06, p < 0.05). Conclusion We found a high prevalence of stigma associated with HIV faced by Brazilian women from all regions of the country, both in everyday life and in healthcare contexts. Evidence-based interventions to reduce stigma in the general population, and specific mental health care aimed at women with HIV in Brazil, especially among those with greater socioeconomic vulnerability, are urgent.

Small-scale sheep and cattle enterprises in Scotland: Demographics, animal health, and biosecurity

Livestock keepers who operate on a small scale in the United Kingdom are often described as either smallholders or hobby farmers; however, this is not always the case. There is another distinct population in Scotland. The crofting system promotes the preservation of a way of life that is significant to the cultural heritage of Scotland, whilst at the same time utilising and maintaining marginal land that could otherwise be deemed of very low productive value. We developed two cross-sectional questionnaire surveys to gather descriptive data about individuals from two populations (crofters and smallholders) who kept sheep and/or cattle. Our aim was to explore demographics, animal health, husbandry, and biosecurity practices of these two communities, including how they may interact with other livestock sectors. Most respondents in each population kept sheep, with far fewer keeping cattle. There was a distinct geographical difference in the approximate location of respondents’ holdings. Movement of sheep was often local, temporary, and exempt from reporting to national databases. Visits from the vet were infrequent, but the vet remained an important source of animal health advice, alongside peer networks. The information from these surveys is valuable because policy decisions taken with predominantly larger, commercial-scale enterprises in mind also frequently apply to small-scale enterprises, even though these smaller enterprises may not have the same opportunity to influence those decisions or implement the requirements. Aspects of agricultural activity and food production at the scale explored in these surveys – including plurality of employment and diversification away from purely agricultural activities – are relevant to the United Nations Sustainable Development Goals of sustainable cities and communities, zero hunger and life on land. In this context, competent authorities should support this type of context-sensitive agriculture, alongside seeking to maintain animal health and welfare standards at the highest possible level on a national scale. Our surveys contribute to improved understanding of how these enterprises function and therefore will support policy makers when considering the breadth of keepers and circumstances affected by rules and regulations governing agriculture.

Peers Influence on Youth Political Behavior: A Systematic Review

Youth political behaviour plays a crucial role in shaping the democratic system of a country. Several factors, such as socio-economic status, employment opportunities, and educational background, have been extensively studied in relation to their impact on youth political behaviour. However, there is a deficiency in systematic reviews specifically focusing on the influence of peers on youth political behavior. This article aims to address this gap by conducting a systematic review of relevant studies from the Web of Science, Scopus, SpringerLink, and ProQuest databases. In total, 30 studies were identified through comprehensive search terms such as “peer influence”, “youth”, “political knowledge”, and “political behavior”. Through this review, four key themes emerged: (1) political knowledge, (2) group discussion, (3) peer pressure, and (4) identity development. The findings highlight the significance of identity development and peer pressure as the most influential factors shaping youth political behaviour. By adhering to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines, this review encompasses studies conducted in various countries without any geographical restrictions. Gaining a comprehensive understanding of how peers influence the political behaviour of youth can provide leaders and policymakers with crucial insights for encouraging knowledgeable peer networks.

Towards a Formal MultipathP2P Protocol

Peer-To-Peer networks are becoming increasingly common as a mean of transferring files over Internet. In this paper, we describe, first, the design and implementation of our P2P system (MultiPathP2P). This latter is based on the social networks concepts where nodes are identified through their virtual addresses, we have designed our protocol based on 1) An architecture exploiting the principle of social networks where nodes are identified by virtual addresses and are able to randomly change their neighbors 2) A process of data request and file sharing differing from those supported in other P2P networks. Second, we present a formal validation of our proposal in order to prove its optimality and completeness.

Research on blockchain smart contract technology based on resistance to quantum computing attacks.

In recent years, blockchain technology has developed rapidly and has been widely used in medical, financial, energy and other fields. However, in the process of practical application, each blockchain is a small independent ecosystem, with all transactions and operations limited to the chain, resulting in a large number of mutually heterogeneous to independent blockchains. It presents challenges for cross-chain interactions, cross-organization data sharing, and cross-blockchain expansion, and hinders the wider application of blockchain technology. In addition, the traditional digital signature method based on elliptic curve cipher faces the threat of being cracked by quantum computing attacks. To solve the aforementioned problems, this paper proposed a blockchain smart contract technique based on quantum computing attack resistance(BSCTQCAT). The technique first introduces the digital signature of the lattice cipher into the blockchain to resist the quantum search algorithm attack. Then, based on the smart contract authentication scheme, the nodes on multiple heterogeneous chains are organized into an identity agent layer P2P network, through which transactions on the chain will establish a credible identity management and message authentication mechanism between different chains, solving the current problem that each chain is difficult to communicate with each other. In this paper, the performance of the algorithm is evaluated by simulating the Bitcoin transaction scenario and analyzing the experimental data.

Perceptions of Overdose Response Hotlines and Phone Application Services Among Women and Gender-diverse Individuals Who Use Drugs in Canada: A Qualitative Study.

In 2021, opioid-related deaths have increased by 96% and continue to be higher than prepandemic levels. In particular, women and gender-diverse individuals face numerous challenges when assessing harm reduction supports, including physical supervised consumption sites, compared with male counterparts. Mobile overdose response services (MORSs) including overdose response hotlines and phone-based overdose response applications are novel virtual overdose response technologies that may help mitigate this issue. This study aims to explore how women and gender-diverse individuals engage with and perceive these services. A qualitative study using grounded theory was conducted. Using existing peer networks and purposive and snowball sampling between March and July 2023, 19 semistructured interviews were conducted with women and gender-diverse individuals in Canada who have lived experience using substances. NVivo was used for thematic analysis, which continued until saturation was reached. The interviews elucidated the following 5 themes: Overdose response hotlines and applications were generally preferred over supervised consumption sites due to (1) perceived gender-based safety; (2) better accommodation for mothers concerned with stigma, childcare, and child welfare systems; and (3) eased accessibility for those involved in sex work. It was also noted that (4) judgment-free spaces and trauma-informed care provided by staff with lived experiences were invaluable, and (5) decriminalization of illicit substances will encourage uptake of these harm reduction services. This study found that women and gender-diverse individuals felt positively toward overdose response hotlines and applications with the potential to fill a need in providing harm reduction services that create feelings of safety, support roles of motherhood and sex work, and generate nonstigmatizing spaces.

Transmission of Mental Disorders in Adolescent Peer Networks.

Previous research indicates that mental disorders may be transmitted from one individual to another within social networks. However, there is a lack of population-based epidemiologic evidence that pertains to the full range of mental disorders. To examine whether having classmates with a mental disorder diagnosis in the ninth grade of comprehensive school is associated with later risk of being diagnosed with a mental disorder. In a population-based registry study, data on all Finnish citizens born between January 1, 1985, and December 31, 1997, whose demographic, health, and school information were linked from nationwide registers were included. Cohort members were followed up from August 1 in the year they completed ninth grade (approximately aged 16 years) until a diagnosis of mental disorder, emigration, death, or December 31, 2019, whichever occurred first. Data analysis was performed from May 15, 2023, to February 8, 2024. The exposure was 1 or more individuals diagnosed with a mental disorder in the same school class in the ninth grade. Being diagnosed with a mental disorder during follow-up. Among the 713 809 cohort members (median age at the start of follow-up, 16.1 [IQR, 15.9-16.4] years; 50.4% were males), 47 433 had a mental disorder diagnosis by the ninth grade. Of the remaining 666 376 cohort members, 167 227 persons (25.1%) received a mental disorder diagnosis during follow-up (7.3 million person-years). A dose-response association was found, with no significant increase in later risk of 1 diagnosed classmate (HR, 1.01; 95% CI, 1.00-1.02), but a 5% increase with more than 1 diagnosed classmate (HR, 1.05; 95% CI, 1.04-1.06). The risk was not proportional over time but was highest during the first year of follow-up, showing a 9% increase for 1 diagnosed classmate (HR, 1.09; 95% CI, 1.04-1.14), and an 18% increase for more than 1 diagnosed classmate (HR, 1.18; 95% CI, 1.13-1.24). Of the examined mental disorders, the risk was greatest for mood, anxiety, and eating disorders. Increased risk was observed after adjusting for an array of parental, school-level, and area-level confounders. The findings of this study suggest that mental disorders might be transmitted within adolescent peer networks. More research is required to elucidate the mechanisms underlying the possible transmission of mental disorders.

The cycle of violence: effects of violence experience, behavior, and attitudes on adolescents’ peer rejection networks

Previous research on adolescent peer networks has mainly focused on friendship networks and their association with violence, but very limited research is available on peer rejection networks. This lack of knowledge hinders the effectiveness of preventing peer rejection and its negative effects. Based on the theory of the cycle of violence, the present study examines the extent to which parental physical abuse experiences, aggressive behavior toward peers and acceptance of violence are related to peer rejection networks at school. Social network analysis with a stochastic actor-oriented model of longitudinal data collected from high school students (Wave 1, n = 620; Wave 2, n = 590) confirms that adolescents who frequently use aggression toward their peers are more likely to be rejected, especially if those adolescents have experienced abuse. Similarly, peers are more likely to reject adolescents with high levels of accepting violence. The results also show that aggression toward peers generally tends to decrease over time but not for adolescents who reject a larger number of students. For students who reject many peers, aggression frequency increases. From the perspective of resilience theory, peer rejection, when combined with aggression toward peers and acceptance of violence, particularly in female adolescents, creates a significant risk factor for socio-emotional development. Therefore, tackling violence attitudes, experiences and behavior in the school environment and at home is crucial in overcoming the cycle of violence.

College peer effects on learning behaviors in synchronous online courses

This study contributes to the growing body of research on peer effects in educational contexts by examining the peer effects on learning behaviors, which are pivotal in understanding how peers impact academic achievements, especially in online education. Drawing upon an administrative dataset and a learning behavior dataset from an online education platform at a Chinese research university in 2020, we employ fixed effects and dynamic models to investigate the peer effects on undergraduates' class absence. Notably, we further consider partially overlapping networks of peers and utilize the class absence of “classmates of classmates” (who are not one's own classmates) as instrumental variables for peers' absence to address potential estimation biases. Our findings reveal significantly positive effects of classmates' class absence on individuals' both full-class and part-class absence in synchronous online courses. Additionally, heterogeneity analyses show that males, freshmen and sophomore students are more susceptible to peer influence and exhibit greater influence on their peers, and peer effects are stronger in subject required courses, courses with larger class sizes, courses with mandatory attendance policies, and among students in the same department or grade level.

Perceived quality of peer relationships and position in peer network from late childhood to early adolescence: A three-wave longitudinal study with cross-lagged panel model

Objective: The main aim of this study was to investigate the mutual relationship between perceptions of peer relationship quality and position in positive and negative peer networks among young people from late childhood to early adolescence. Method: A cross-lagged panel model of three waves of data was conducted using a large representative sample of Polish students from third grade to sixth grade ( N = 4 673). Results: The results proved a reciprocal relationship between position in positive (Like) and negative (DisLike) peer networks and the perceived quality of peer relationships (PPI). The effect found of position on the perceived quality of peer relationships is in line with the existing state of knowledge. Since previous research has yielded divergent results, this demonstration of the prospective impact of perceived relationship quality on peer network position fills an important cognitive gap. The study also revealed the following: (1) in the first (W1→W2) and second period (W2→W3) the strength of the prospective effects of position in the peer network on its perceived quality (Like→PPI and DisLike→PPI), and the strength of the prospective effects of perceived quality on position (PPI→Like and PPI→DisLike), were not statistically significantly different; (2) the effect size of the cross-lagged coefficients ranged from small to medium; (3) all constructs showed greater stability in the second period than in the first; (4) in both periods stability of PPI was lower than the stability of sociometric indicators. Conclusion: This research confirms the presence of a self-reinforcing loop: a low position in peer networks→poor perceived quality of relations→decrease of position in peer networks. The findings are discussed in relation to the evolutionary theory of loneliness (ETL), which assumes a potentially active role of the perception of peer relationships in forming a position in a peer network. Practical implications of the results are discussed.

Alone in the Academic Ultraperiphery: Online Doctoral Candidates’ Quest to Belong, Thrive, and Succeed

Despite the increasing number of non-traditional doctoral researchers, this population’s experiences remain largely understudied and their voices unheard. Through in-depth interviews with 24 part-time online doctoral candidates, we explored the perceived facilitators and barriers to academic integration and sense of belonging, as well as how online delivery influences the doctoral journey. Reflexive thematic analysis revealed a strong drive for participation, sometimes matched by the supervisor but rarely supported by the institution, which in the end does not sufficiently promote community building. Online delivery was viewed as both a blessing for the accessibility it enabled and a curse due to pervasive feelings of isolation and virtually non-existent peer networks. Online doctoral researchers coped by breaking free from the fully online model whenever possible to seek in-person and synchronous interactions and guidance. We conclude that online doctoral candidates constitute an ultraperipheral population in the academic landscape. Support provided by online PhD programmes should be modelled after the actual needs of their non-traditional students.

Organisational Dynamics of University Social Capital: Developing Constructs Through Factor Analysis

&lt;p style="text-align:justify"&gt;This study is designed to illuminate the role of four key constructs—teacher-student relationships, peer networks, satisfaction with support services, and employability trust—in shaping the social capital within universities. Utilising a sample of 1902 working students derived from the Eurostudent VII survey data, this research applies both exploratory and confirmatory factor analysis to validate the proposed model. The findings indicate that all four constructs demonstrate statistically significant and positive associations with university social capital. Crucially, the measures of reliability and validity are within an acceptable range, lending credibility to the findings. The teacher-student relationship was found to be the most influential factor, highlighting its crucial value in the functioning of social capital inside universities. Along with providing a framework for future studies on the ever-changing nature of social capital in universities, the results highlight the significance of cultivating an interconnected academic community, which enriches the educational organisation as a whole.&lt;/p&gt;

Tri-composed fuzzy relation inequality with weighted-max-min composition and the relevant min-max optimization problem

In the existing works, the classical fuzzy relation inequality (FRI) with double-composed operators has been introduced to describe the P2P network system. In this work, considering the successful rate of the line connection within the P2P network system, we establish the so-called tri-composed FRI, with a weighted-max-min composition, for the first time. We study the solutions induced through paths and further construct the complete solution set of the tri-composed FRI using the path-induced solutions. Moreover, the whole solution set could be fully determined by all the path-induced solutions and its unique maximum solution. Furthermore, considering a specific optimal management objective in the P2P network, we further study the min-max optimization problem with the tri-composed FRI constraints. A path-based algorithm is proposed for handling the problem we studied, accompanied by an illustrative example.

Include board members in peer groups, networking opportunities

While your nonprofit may frequently send senior staff and even the executive director to attend conferences, join peer groups and network with others in the field, it's not all that common for board members. And that's to their detriment, according to Eugene Fram, professor emeritus at Saunders College of Business at the Rochester Institute of Technology.

Acceptability of an Incentivized Peer Referral Intervention to Address COVID-19 Vaccine Hesitancy Among Adults in Yopougon-Est, Côte d'Ivoire.

Vaccine hesitancy persists as a barrier to vaccine uptake among adults across geographies. We pilot-tested an incentivized peer referral intervention in Yopougon-Est, Côte d'Ivoire, to encourage adults who recently received COVID-19 vaccination to discuss their experiences and motivate family and friends to seek vaccination.Implementation: From May through June 2023, the intervention operated at 2 vaccination sites, where staff approached individuals immediately after receiving COVID-19 vaccination. Interested vaccine recipients received up to 9 referral coupons to distribute among their social circles, with a small financial incentive (approximately US$3) offered for each person they referred who returned to 1 of the 2 sites for COVID-19 vaccination. We collected data on numbers of people vaccinated and coupons returned. Qualitative interviews were conducted with 40 referred vaccine recipients and 7 public health officials. During the 6-week intervention, 450 newly vaccinated individuals were offered the opportunity to enroll, with 197 opting to distribute coupons. Nearly half (45%) of these peer mobilizers who distributed coupons referred at least 1 person who subsequently came in for vaccination, and most of this subset had 2 or more completed referrals. Qualitative findings revealed that coupons served as effective reminders, sparking discussions within social networks and prompting vaccine-seeking behavior. According to the referred vaccine recipients, hearing about their peers' vaccination experience influenced uptake. Vaccine recipients and public health officials found the small referral incentive acceptable. Officials noted the intervention's potential utility and cost effectiveness, suggesting possible sustainability. This incentivized peer referral intervention, capitalizing on peer networks and social norms, holds promise for increasing vaccine uptake in Yopougon-Est and potentially in other vaccination contexts globally. Practitioners can leverage the implementation guide and training materials we developed to replicate the intervention at larger scale and assess impact on vaccination trends.

A computational model of the effects of borrower default on the stability of P2P lending platforms

Peer-to-peer (P2P) lending has attracted scholarly attention because of its economic significance and potential to democratize access to finance. However, P2P lending platforms face many challenges and failures that we need to understand more clearly. We build a computational model to study how borrower default affects P2P platform lending. We show that borrower default disrupts the P2P network formation process and undermines platform stability. Moreover, we find that defaults increase the inequality in accessing funding and provide a rationale for using curation rules, widely used in P2P platforms, in contrast to P2P insurance, which fosters cascading defaults. We also address a new trend in P2P lending platforms in which large companies (institutional investors) play an increasingly important role. We find that the presence of large companies creates a denser network (more loans) but generates a trade-off between making the platform more resilient to cascading defaults and more dependent on specific players. Overall, we explain how borrower defaults affect platform stability and what makes a platform vulnerable, threatening its survival. We discuss research and managerial insights into platform stability and the economic effect of P2P lending platforms.

Peer groups, networking can aid board development

While it may be common for nonprofit executive directors and senior staff to attend conferences, join peer groups and network with others in the field, it's not all that common for board members. And that's to their detriment, according to Eugene Fram, professor emeritus at Saunders College of Business at the Rochester Institute of Technology.

A Web-Based Peer Support Network to Help Care Partners of People With Serious Illness: Co-Design Study.

Care partners of people with serious illness experience significant challenges and unmet needs during the patient's treatment period and after their death. Learning from others with shared experiences can be valuable, but opportunities are not consistently available. This study aims to design and prototype a regional, facilitated, and web-based peer support network to help active and bereaved care partners of persons with serious illness be better prepared to cope with the surprises that arise during serious illness and in bereavement. An 18-member co-design team included active care partners and those in bereavement, people who had experienced serious illness, regional health care and support partners, and clinicians. It was guided by facilitators and peer network subject-matter experts. We conducted design exercises to identify the functions and specifications of a peer support network. Co-design members independently prioritized network specifications, which were incorporated into an early iteration of the web-based network. The team prioritized two functions: (1) connecting care partners to information and (2) facilitating emotional support. The design process generated 24 potential network specifications to support these functions. The highest priorities included providing a supportive and respectful community; connecting people to trusted resources; reducing barriers to asking for help; and providing frequently asked questions and responses. The network platform had to be simple and intuitive, provide technical support for users, protect member privacy, provide publicly available information and a private discussion forum, and be easily accessible. It was feasible to enroll members in the ConnectShareCare web-based network over a 3-month period. A co-design process supported the identification of critical features of a peer support network for care partners of people with serious illnesses in a rural setting, as well as initial testing and use. Further testing is underway to assess the long-term viability and impact of the network.

Nurses' Well-Being: An Amazing Recipe, But What Ingredients Remain Missing?

The term "system well-being" can move forward a new vision, meaning the result coming from the addition of the well-being of persons belonging to different institutions and organizations, which are all parts of the "health care system." Beginning with this "new definition," with the aim of analyzing the multifaceted issues related to nurses' well-being, we could use the "classical nursing metaparadigm" composed of 4 concepts: "health," "nursing," "environment," and "person." We briefly describe this conceptual map and provide some focused suggestions for further reflection on topics such as physical and psychological well-being, economic gain and career opportunities, work climate, burnout, low job satisfaction, moral distress, compassion fatigue, and a joyful work environment. This view may help organizations to focus on interventions to prevent or eliminate stress, which may be more proactive and effective than interventions to manage stress. Moreover, it offers a multidimensional map to analyze the different aspects influencing the well-being issue, keeping in mind that a concrete solution can be obtained only if all the components of health care systems and society do their part. Some solutions proposed by authors and organizations to increase nurses' well-being are mindfulness based, such as meditation, yoga, acupuncture, gratitude, journaling, choirs, coaching, workload reduction, job crafting, and peer networks. Other reflections on work organization, expected professional behaviors, nurses' retention, and education should be added to the discussion on this multidimensional issue.

Spatial Structure of Peer Networks and Academic Achievement Based on a Random Control Trial Experiment

AbstractThis paper investigates whether changing the seating arrangement in a classroom can facilitate positive spillovers from top‐performing students to others, using a field experiment conducted in a Chinese high school. Among study groups with balanced abilities, the treatment altered the spatial distribution by assigning the two top students to seats in the spatial center of each group. In the reference groups where students were allowed to choose their own seating arrangements, the lowest performing were significantly less likely to sit next to a top student than they would be under a random assignment. The results suggest that, in the treated groups, there could be enhanced academic spillovers from the top students. The treatment especially benefited the two lowest performing students in science subjects. In contrast, the treatment exerted negative effects on the test scores of the two middle‐performing students, due to a disruption mechanism. The results suggest that the spatial layout of a peer network can have a significant impact on learning outcomes.