Thursday, November 27, 2025

 

Narrating immigrants’ pain and tragedy can reduce perceived threat to Muslim immigrants in the US





University of Sharjah
Main findings 

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The findings are striking: tragic narratives elicited significantly more empathy and compassion than nostalgic ones. In simple terms, participants exposed to stories of real suffering felt more connected to and less threatened by Muslim immigrants.

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Credit: Dr. Syed Ali Hussain




US media and politicians often celebrate beautiful stories of immigrants arriving in America, finding a new home, and thriving in the land of opportunity.

However, a new study published in the Journal of Intercultural Communication Research challenges these prevailing assumptions, particularly regarding Muslim immigrants. Contrary to widely held views, the research urges US media and educators to draw from the painful and tragic stories that the immigrants themselves share.

The researchers highlight that nostalgia—a sentimental longing for “the good old days”—is a powerful tool frequently leveraged by media, politicians, and advertisers to evoke emotional connection. Yet, they caution that nostalgia, when misapplied, can reinforce exclusion and deepen divides between in-groups and out-groups.

“We wanted to flip nostalgia on its head—use it not to divide, but to unite,” says Dr. Syed Ali Hussain, a media communication scholar at Sharjah University’s College of Communication. “To find out, we designed an experiment. We produced short videos about a Muslim refugee family: one told through nostalgia—happy memories of home before war; another through tragedy—the family’s painful displacement and loss. We asked participants to watch (the videos) and then share their responses about the family.”

Scientists affiliated with universities in the US, China, and the UAE participated in the research. Their findings are striking: tragic narratives elicited significantly more empathy and compassion than nostalgic ones. In simple terms, participants exposed to stories of real suffering felt more connected to and less threatened by Muslim immigrants. Conversely, nostalgic stories—those recalling a beautiful past—often triggered weaker empathy and, in some cases, reinforced subtle forms of social distance.

The authors argue that in a polarized society like the US, narratives about immigrants—often framed as “the other”—can either build empathy or evoke fear. Their research revolves around a key question through which they examine the potential of stories grounded in nostalgia and tragedy in reshaping Americans’ perceptions of Muslim immigrants.

The experiences of Muslim immigrants in the US, home to nearly 4.5 million Muslims, remain a frequent subject of debate and discussion. Polling organizations and think tanks have documented a sharp rise in anti-Muslim discrimination and hate incidents. According to a 2025 report by the Council on American-Islamic Relations (CAIR), the organization received more than 8,650 complaints of discrimination and Islamophobic attacks—the highest number since it began publishing civil rights reports in 1966.

To understand the drivers and possible remedies for this surge in anti-Muslim bias, the authors review a wide range of studies conducted in the US. Some attribute the problem to news and social media, which amplify narratives that reinforce negative stereotypes. Other research highlights a correlation between fear of terrorism, prejudice against immigrants, and negative attitudes toward Muslims.

To examine whether nostalgia- or tragedy-based narratives can increase empathy and perspective-taking toward Muslim immigrants, the authors created four narrative videos as research stimuli. These included a tragedy narrative depicting the devastating effects of war on a Muslim refugee family and a nostalgia narrative portraying happier times in the same family’s life before they became refugees.

The study involved 239 adult participants (121 women, 116 men, and 2 transgender individuals) recruited via Amazon Mechanical Turk (MTurk), a platform increasingly recognized for providing access to diverse, non-student US populations in psychological and communication research.

“The main experiment showed that tragedy narratives, more than nostalgia, indirectly influenced threat perceptions and helping intentions through empathy,” the authors write. “Compared to tragedy narratives, nostalgia narratives elicited less empathy. There was no significant direct effect of narrative content on threat perceptions and intention to help the Muslim family.”

They report that tragedy narratives elicited more empathy, while nostalgic narratives resulted in less empathy. “There was no direct effect on the outcomes; significant indirect effects were observed through empathy on threat perceptions and intention to help, indicating that empathy served as a mediator.

“Tragedy narratives, compared to nostalgia narratives, were able to evoke more empathy for the narrator, which further led to reduced realistic and symbolic threat perceptions as well as increased intention to help the Muslim family.”

Summarizing the outcome of the study, co-author Dr. Mary Bresnahan of the Department of Communication at Michigan State University stated, “Empathy is not about longing for yesterday. It’s about caring for someone today. The bottom line is that peacebuilding begins person to person and family to family.”

Reflecting on the broader significance, Dr. Hussain explained, “Our findings matter because they challenge how we design public campaigns, news features, or even films about migration. When we sanitize or sentimentalize the immigrant experience, we risk diluting empathy. But when we acknowledge struggle—when we humanize pain rather than romanticize the past—we create space for understanding.”

The authors emphasize that the implications of their research extend beyond academia, offering insights for nonprofit organizations working with refugees, journalists covering immigration stories, media professionals producing documentaries, educators teaching intercultural communication, and state-run immigration agencies.

 

Uncovering hidden losses in solar cells: A new analysis method reveals the nature of defects




A joint research team from Korea Institute of Energy Research and Chungbuk National University has, for the first time, identified that defects in silicon heterojunction solar cells exist in two distinct forms.



National Research Council of Science & Technology

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A researcher is analyzing defects in silicon heterojunction solar cells.

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Credit: KOREA INSTITUTE OF ENERGY RESEARCH




A joint research team led by Dr. Hee-Eun Song of the Photovoltaics Research Department at the Korea Institute of Energy Research (President Yi Chang-Keun, hereafter “KIER”) and Prof. Ka-Hyun Kim of the Department of Physics at Chungbuk National University (President Koh Chang-Seup, hereafter “CBNU”) has successfully identified, for the first time, the specific types of defects responsible for efficiency loss in silicon heterojunction (SHJ) solar cells. The findings are expected to significantly contribute to improving solar cell efficiency when combined with defect-suppression (passivation) techniques.

Silicon Heterojunction Solar Cell (SHJ): A silicon-based solar cell structure with the highest efficiency among existing silicon technologies. Recently, it has been actively used in tandem solar cells, where different types of solar cells are stacked together to achieve even higher efficiencies.

Various defects that occur within solar cells cause losses and reduce both conversion efficiency and power output. To prevent this, passivation techniques, such as applying surface coatings, are used to control these defects. For passivation to be applied effectively, it is essential to fully understand the types and characteristics of the defects present in each solar cell.

The conventional defect-analysis method known as Deep Level Transient Spectroscopy (DLTS) applies a short voltage pulse to the solar cell, temporarily altering its electronic properties, and then analyzes the device by measuring its response as it returns to its normal state (hereafter “transient response”). However, because the time it takes for the device to relax back to equilibrium is extremely short, on the order of milliseconds, previous approaches typically measured only two points: once immediately after the voltage pulse and once when the device had fully returned to its steady state, rather than capturing the entire transient response.

This approach is suitable for analyzing devices with simple structures, but because it does not capture the full transient response, it is not appropriate for devices such as silicon heterojunction solar cells, which contain multiple, complex defects. As a result, even until recently, the defects and characteristics of silicon heterojunction solar cells could only be inferred indirectly, making it difficult to determine their true nature.

To address this limitation, the research team refined the conventional analysis method and proposed a new interpretation technique capable of examining the solar cell’s entire transient response. Through this approach, they discovered that the key defect in heterojunction solar cells, previously assumed to be a single type, is in fact a superposition of two distinct defects. In other words, they have, for the first time, identified that defects in silicon heterojunction solar cells exist in two combined forms.

The two defect types identified by the research team are a slow component (deep-level defect) and a fast component (shallow-level defect). By analyzing each component separately, the team extracted various defect characteristics, such as the defect energy level, spatial location within the device, and atomic bonding configuration. This demonstrates that, for effective integration with passivation technologies, both quantitative evaluation (e.g., increases or decreases in defect density) and qualitative assessment focused on the defects’ impact on device performance are critically important.

The research team also found that the two types of defects can undergo changes in atomic bonding configuration depending on the solar cell’s fabrication process and device operation conditions. In particular, they experimentally demonstrated that hydrogen present within the solar cell plays a key role in driving these defect-state transformations.

Dr. Hee-Eun Song of the Photovoltaics Research Department at KIER stated, “We expect that this study will accelerate the development of high-efficiency silicon heterojunction solar cells and, furthermore, enable us to realize world-class tandem solar cells using KIER’s proprietary technologies.”

Professor Ka-Hyun Kim of the Department of Physics at Chungbuk National University stated, “This study provides a fundamental understanding of the relationship between defects and passivation,” adding that “the developed analysis method can be extended not only to solar cells but also to a wide range of semiconductor and display applications, including sensors, LEDs, and CMOS devices.”

The joint research was conducted using SHJ solar cells fabricated at the Center for Advanced Solar PV Technology (CAST) at KIER, and the DLTS measurements were analyzed at CBNU. The results of this work provide a solid foundation for high-efficiency tandem solar cells.

This research was supported by KIER’s Basic Research Program and was selected as a cover article for the October 2025 issue of Advanced Functional Materials (IF 19, top 4.5% in JCR), a world-renowned journal in materials science.

The research team is inspecting the quality of the fabricated silicon heterojunction solar cells

Silicon heterojunction solar cells developed by KIER

 

Flame-retardant recyclable epoxy networks: Strategies, mechanisms, and future directions




Songshan Lake Materials Laboratory
Advanced flame-retardant recyclable epoxy resin system 

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Advanced flame-retardant recyclable epoxy resin system.

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Credit: Qingshan Yang, Pingan Song and Siqi Huo from University of Southern Queensland; Hao Wang from Swinburne University of Technology





Research teams from Swinburne University of Technology and University of Southern Queensland have provided a deep overview of the current state of the art of fire-retardant recyclable epoxy systems (FRREs) based on covalent adaptable networks. By integrating dynamic covalent bonds (DCBs) and flame-retardant groups into the epoxy crosslinking network can effectively improve fire safety and recyclability. However, how to balance the recyclability, flame retardancy, and network stability of FRREs remains a key challenge. This review provides valuable insights into the directional design of high-stability FRREs.

Epoxy resins (EPs) are fundament material in modern industries owing to their exceptional properties and thermal stability. These qualities make them indispensable in electronics, automotive, aerospace, and structural engineering applications. They are widely used in the fields of adhesives, coatings, electronics and electrical, construction, and carbon fibers-reinforced polymers (CFRPs) due to its excellent processability, mechanical properties, adhesive performance, corrosion resistance, and dimensional stability. However, there are two main drawbacks of EP materials in practical industrial applications: (i) high flammability due to their carbon-hydrogen-based structure; and (ii) non-recyclability/reprocessability caused by their permanently crosslinked network. These problems raise safety concerns and environmental issues. Currently, efforts to enhance fire safety often involve adding flame-retardant additives, which can compromise mechanical strength and complicate recycling processes.

Despite advancements in flame-retardant strategies, sustainability remains elusive. Conventional epoxy systems are predominantly thermosetting, rendering them difficult to recycle, and their fixed network structures tend to deteriorate over time, especially under environmental stress. The integration of reversible bonds through dynamic covalent chemistry (DCC) offers a promising avenue to imbue epoxy networks with recyclability and self-healing capabilities. Yet, achieving a delicate balance between flame retardancy, recyclability, and in-service performance has remained a significant hurdle. Depending on the difference of dynamic covalent reactions, FRREs can be categorized into carboxylic ester-based, phosphate ester-based, imine-based, disulfide-based, and Diels-Alder-mediated exchange. Nevertheless, the introduction of weak reversible linkages and labile flame-retardant structures inevitably compromise the structural integrity of the networks, resulting in reduced thermal stability, creep resistance, and long-term durability in harsh service environments. This contradiction between dynamic recyclability and network stability represents the central obstacle preventing FRREs from broader engineering applications. Following this, researchers proposed some feasible and potential solutions to construct high-stability FRREs, such as (i) controlling catalytic activity, (ii) incorporating high-energy DCBs, (iii) introducing rigid or conjugated groups, (iv) utilizing noncovalent interactions, (v) constructing hyperbranched and interpenetrating networks.

By rational structure design, future FRREs are expected to achieve the combined goals of excellent in-service performance, outstanding flame retardancy, and high-efficiency recyclability. Nevertheless, several challenges and technical barriers related to achieving an optimal balance between recyclability, flame retardancy, and long-term stability continue to hinder the large-scale application and commercialization of high-stability FRREs. To advance the practical implementation of these materials, future research should focus on optimizing molecular design strategies, conducting systematic mechanistic studies, employing theoretical modeling, and developing scalable manufacturing processes.

This review provides a comprehensive roadmap for the directional design and fabrication of FRREs, while also suggesting promising research pathways for developing high-stability FRREs.

This work has been recently published in the online edition of Materials Futures, a new international journal in the field of interdisciplinary materials science research.

Reference: Qingshan Yang, Yong Guo, Guofeng Ye, Cheng Wang, Asim Mushtaq, Min Hong, Pingan Song, Hao Wang, Siqi Huo. Fire-retardant recyclable epoxy systems based on covalent adaptable networks[J]. Materials Futures. DOI: 10.1088/2752-5724/ae17de