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Objective The goal was to explore low‐income, Black fathers' personal strengths and barriers to engaged fatherhood, healthy relationships, and economic stability. Background Fatherhood programs often rely on case management and education to promote positive fathering, healthy relationships, and economic stability. However, methods should be tailored to fit the strengths and needs of participating fathers. Low‐income, Black fathers face additional challenges related to systemic discrimination and structural violence that can hinder their success. To effectively serve this group, research is required to understand their relevant strengths and barriers. Methods Semistructured focus groups explored fathers' personal strengths and barriers specific to the three areas of interest with fatherhood program staff (n = 8) and enrolled fathers (n = 26). Thematic analysis was conducted then systematically vetted by community scholars (previously enrolled or graduated fathers). Results Fathering strengths included empathy, listening skills, and active family participation. Barriers included limited custody or access, individual constraints, and unmet social needs. Participants contextualized these findings with structural issues related to coparenting and the legal system (e.g., biased court systems). Men's relationship strengths included mutual respect and teamwork. Barriers included past trauma, lack of healthy relationship models, and relationship strain. Economic stability strengths included financial literacy and motivation to provide, whereas barriers included legal history, financial obligations, and limited resources. Conclusion These findings highlight key individual‐level strengths and barriers grounded in fathers' intersectional identities as predominantly low‐income, Black men. Implications Programs serving low‐income, Black fathers should consider tailoring their programming to the lived experiences of participants to navigate these critical barriers and amplify assets for success.

This multi-methods dissertation, consisting of a systematic review, quantitative study, and qualitative study, examines and explores the link between violence exposure and bullying perpetration among youth, focusing on the role of youth’s identities and social contexts, such as gender, race/ethnicity, and socioeconomic status. Using Bronfenbrenner’s (1994) social-ecological framework, the systematic review synthesizes the quantitative literature examining the link between violence exposure and traditional and cyberbullying perpetration among youth, with particular attention to the contexts of violence exposure and roles of youth’s identities and social contexts. The review found that most studies reported significant associations between different forms of violence exposure in varying social-ecological systems and traditional/cyberbullying perpetration. Gaps in the literature were found, as none of the studies considered the contexts of violence exposure in their analyses, and only a small number of the studies examined the role of youth’s identities in shaping the link between violence exposure. The findings from the studies that examined the role of identities reflected nuances and complexities, warranting further research. Informed by the social-ecological framework, developmental psychopathology, and hegemonic masculinity framework, the quantitative study used the Future of Families & Child Wellbeing Study data to examine the association between cumulative violence exposure and bullying perpetration among youth, with attention to the roles of sex assigned at birth as a moderator. Greater levels of cumulative violence exposure significantly predicted greater odds of bullying perpetration among adolescents; however, sex assigned at birth did not significantly moderate this relationship. Finally, the qualitative study employs hermeneutic phenomenology to explore the perspectives and lived experiences of eight violence-exposed adolescent boys about the links between masculinity, bullying, and youth’s identities and social contexts. Three themes were drawn from the boys’ stories on masculinity: internalization of the traditional narratives of masculinity, transcending the traditional narratives of masculinity, and growth and maturity. Three themes were drawn regarding the link between boys’ masculinity and bullying: embodiment of heteronormativity and misogyny, power and dominance, and victims to bullies. Finally, boys provided varying perspectives on how race/ethnicity may or may not affect their gender socialization and experience of bullying.

Dairy cattle farming was identified as an important source of enteric methane (CH4) emissions. In order to contribute to the improvement of the national greenhouse gas emission inventory, this work aims to develop emission factors (EF) for CH4 emissions from enteric fermentation in dairy cattle in South Korea. Information on dairy cattle herd characteristics, diet and management practices specific to the Korean dairy cattle population were gathered. EF was estimated according to the 2019 refinement to the 2006 Intergovernmental Panel on Climate Change (IPCC) using the Tier 2 approach. Three animal subcategories were considered: milking cows (650 kg body weight, BW), heifers 1~2 years (473 kg BW) and growing animals < 1 year (167 kg BW). The estimated enteric CH4 EFs for milking cows, heifers 1~2 years, growing animal < 1 year, were 139, 83 and 33 kg/head/year, respectively. South Korea adopted the Tier 1 default enteric CH4 EFs for GHG inventory reporting from the North America region. Compared with the generic Tier 1 default EF of 138 kg CH4/head/ year proposed by the 2019 refinement to the 2006 IPCC guidelines for high milking cows, our suggested value is quite similar (139 kg CH4/ head/year). While enteric CH4 EFs values were 23% higher and 49% lower for heifers and growing animals < one year than Tier 1 default EFs values, respectively. In addition, enteric CH4 EF is highly correlated with the level of milk production, feed intake and digestibility and methane conversion factor (%Ym). The outcome of this study underscores the importance of obtaining country-specific EF to estimate national enteric CH4 emissions. Thus, this work is a step forward in the revision of dairy cattle enteric CH4 EF and can further support assessment of mitigation strategies in South Korean livestock farming systems.

An estimated 15.5 million children in the United States are exposed to intimate partner violence (IPV) in their homes each year. Empirical data suggest that childhood IPV exposure is associated with a plethora of adverse outcomes such as poor behavioral regulation, reduced cognitive functioning, and greater aggressive behavior. Within this body of research, it has been suggested that IPV-exposed children are more likely to both perpetrate and fall victim to bullying than non-exposed children. This systematic review explores the relationship between IPV exposure and bullying perpetration and victimization in the existing literature and includes a discussion of individual- and family-level factors that have been considered in the association between IPV exposure and bullying perpetration and victimization. Building upon findings from a broader Evidence and Gap Map, this systematic literature review identified 14 articles that examined the association between IPV exposure and bullying perpetration and victimization. Of these 14 articles, 12 assessed the relationship between youth IPV exposure and bullying perpetration, and 75.0% of these articles (n = 9) found a significant relationship between IPV exposure and bullying perpetration. Ten of the 14 articles examined youth IPV exposure and bullying victimization, with 70.0% of the articles (n = 7) supporting this association. Individual- and broader family-level characteristics, including gender, race/ethnicity, mental health symptoms, other types of adversities, and parenting were also examined. The article addresses implications for research and practice, including methodological suggestions for future studies and avenues for potential intervention for IPV-exposed children experiencing bullying victimization and perpetration.

The quality of adolescent dating relationships is an outcome of developmental importance for young people exposed to intimate partner violence (IPV) in childhood. As adolescents explore romantic interests for the first time, it is important to consider whether youth who have witnessed IPV have an increased likelihood of adolescent dating violence (ADV) victimization and/or perpetration. This systematic review seeks to synthesize empirical literature on ADV victimization and perpetration outcomes in youth exposed to IPV, examine mechanisms that may explain ADV outcomes in IPV-exposed youth, and summarize methodological factors that influence interpretation of findings. Seven bibliographic databases were searched through August 2020 for a broader evidence and gap mapping (EGM) project examining published empirical studies on child outcomes of IPV exposure. Following de-duplication, 350 empirical studies on child IPV exposure outcomes were identified and categorized into child outcome themes, including 29 studies that examine ADV victimization and/or perpetration among IPV-exposed youth. The association between IPV exposure and ADV perpetration and victimization varies widely, with factors such as gender, mental health symptoms, beliefs about violence, and emotion regulation differentially influencing outcomes. Inconsistencies in measurement of IPV, ADV, and sample ages make cross-study comparisons challenging. Practice and research implications are addressed, including the importance of examining strengths-based youth assets and resilient trajectories of healthy dating relationships among IPV-exposed youth.

Relational health has emerged as a consistent factor that can mitigate the effects of trauma among children; however, less is known about relational health with adults, particularly related to intimate partner violence (IPV) perpetration among racially and socioeconomically marginalized men. The Exploratory Sequential Design, Taxonomy Development Model was used. Semi-structured interviews (N = 11) and narrative analysis were conducted in Phase I. In Phase II, variables approximating the key themes that emerged in Phase I were selected from an existing dataset (N = 67), and relationships were examined using bivariate associations. The sample consisted of low-income Black, Indigenous, men of color (BIMOC) in a batterer intervention program (BIP). Adverse life experiences shaped participants’ world view via mistrust in others, stifling emotions and vulnerability, and a sense of personal guilt and shame. These orientations were then carried into adult relationships where men coped using social isolation to manage challenges, negatively affecting intimate relationships. For some men, mental health exacerbated these circumstances. Significant bivariate and multivariate associations supported this narrative. This study lays the foundation for future research to examine the potential effects of social support on IPV perpetration. BIPs should consider augmenting programming to enhance men’s social networks to support their use of nonviolence after program completion.

Infertility treatment often requires patients to self-administer hormonal injections, creating significant physical, logistical, and psychological burdens. While medical technologies have improved pharmacological efficacy and safety, design aspects addressing usability, portability, and emotional distress remain underexplored. This study presents Blloom, a compact self-injection device that integrates ergonomic, thermal, and emotional considerations designed through an interdisciplinary design-thinking framework. This study identified critical user needs related to self-injection anxiety, medication refrigeration, and treatment-related stigma through in-depth, multi-method qualitative design research. The resulting prototype is characterized by one-handed operation, concealed needle delivery, and built-in passive cooling (2–8 °C for up to 8 h). Formative evaluations with patients and clinicians confirmed its improved usability, emotional comfort, and contextual compatibility. At this prototypical stage, medication- and container-specific compatibility, as well as long-term reliability, require further bench testing and clinical validation. Process analysis further revealed how designer–engineer collaboration evolved from empathic exploration to implementation-driven convergence. The findings demonstrate how human-centered design can mitigate the multidimensional burdens of infertility treatment and provide a replicable framework for interdisciplinary innovation in self-managed healthcare devices.

Background Layered double hydroxides (LDHs) are one type of 2-dimensional material with unique structure and strongly positive surface charge. Particularly, LDHs can be exfoliated by mono-layered double hydroxides (MLHs) as a single layer, showing an increased surface area. Therefore, there is a large focus on LDHs for drug delivery applications. Furthermore, most photosensitizers are hydrophobic that they cannot be soluble in aqueous solvents. Herein, we designed a simple way to solubilize hydrophobic photosensitizers by MLH with electrostatic interactions for anticancer photodynamic therapy (PDT), which has tremendous therapeutic advantages. The photosensitizer solubilized via loading on the MLH exhibited fluorescence and singlet oxygen-generation activities in aqueous solvent without chemical modification, resulting in photo-mediated anticancer treatment. Methods Negatively charged hydrophobic photosensitizers, chlorin e6 (Ce6) were solubilized by loading on the MLHs through the electrostatic interaction between positively charged MLHs. MLH/Ce6 complexes evaluated for physico-chemical characterization, pH-sensitive release property, in vitro photocytotoxicity, and in vivo tumor ablation. Results The photosensitizer solubilized via MLH exhibited fluorescence intensity and singlet-oxygen generation activities in aqueous solvent without chemical modification, resulting photocytotoxicity in cancer cells. The encapsulation efficiency of Ce6 increased to 21.2% through MLH compared to 0.6% when using LDH. In tumor-bearing mice, PDT with solubilized MLH/Ce6 indicated a tumor-suppressing effect approximately 3.4-fold greater than that obtained when Ce6 was injected alone. Conclusions This study provided the solubilized Ce6 by the MLH in a simple way without chemical modification. We demonstrated that MLH/Ce6 complexes would have a great potential for anticancer PDT.

Recently, serious concerns have been raised about the privacy issues related to training datasets in machine learning algorithms when including personal data. Various regulations in different countries, including the GDPR grant individuals to have personal data erased, known as 'the right to be forgotten' or 'the right to erasure'. However, there has been less research on effectively and practically deleting the requested personal data from the training set while not jeopardizing the overall machine learning performance. In this work, we propose a fast and novel machine unlearning paradigm at the layer level called layer attack unlearning, which is highly accurate and fast compared to existing machine unlearning algorithms. We introduce the Partial-PGD algorithm to locate the samples to forget efficiently. In addition, we only use the last layer of the model inspired by the Forward-Forward algorithm for unlearning process. Lastly, we use Knowledge Distillation (KD) to reliably learn the decision boundaries from the teacher using soft label information to improve accuracy performance. We conducted extensive experiments with SOTA machine unlearning models and demonstrated the effectiveness of our approach for accuracy and end-to-end unlearning performance.

The objective of this paper is to develop a logical procedure to determine the center roller displacement, in the three-roll bending process, which is required in the fabrication of curved rectangular plates with a desired curvature. To this end, the mechanics of the process was analyzed by both analytical and finite element approaches. Comparisons of the results reveal that a simple analytical procedure, based on the beam theory, yields a reasonably accurate relationship between the center roller displacement and residual curvature. With further development and refinement, the procedure proposed in this work has great promise for practical application, particularly for the automation of the process.[PUBLICATION ABSTRACT]