Potential Competitors Research Articles

Lessons from Wörgl: Key considerations for the continuation of an economic “miracle”

The Wörgl Experiment that took place in the Austrian town of Wörgl has long been celebrated as an economic miracle as the town experienced a remarkable economic revival amidst the Great Depression that drew attention from around the world. Community currency (CC) advocates often tout the experiment as a prime example of the socio-economic impact that CCs can have at the local level. However, despite its success, the Wörgl Experiment was short lived due to being shut down by the Austrian Central Bank. Consequently, questions regarding its unfulfilled potential remain. This paper conducts a detailed analysis of the experiment and uncovers what would have been two key considerations for the experiment’s continued success. The first key consideration would have been the labor certificates convertibility with, and therefore their potential substitutability and competition with the Austrian Schilling. This reframes the current understanding of the Wörgl Experiment as the amount of labor certificates redeemed for Austrian Schillings and its implications have not been discussed in the literature. The second key consideration would have been maintaining demand for the labor certificates in the face of dwindling tax arrears. Implications of these considerations for the broader field of CCs are discussed.

Single amino acid substitution analogs of marine antioxidant peptides with membrane permeability exert a marked protective effect against ultraviolet-B induced damage.

Ultraviolet-B (UVB) causes oxidative stress, which is implicated in skin damage and photoaging. Antioxidant peptides exhibit protective effects against UVB-induced oxidative stress and are thus regarded as potential competitors compared to synthetic antioxidants for cosmetics. In the present study, we provided a discovery pipeline for screening and modifying marine-derived antioxidant peptides, and successfully identified and characterized three novel modified peptides (WP5, LW5 and YY6) with strong antioxidant abilities. Their scavenging activities on 2,2'-azinobis-(3-ethylbenzthiazoline-6-sulphonate) radical (ABTS·) and hydroxyl radical (·OH) were higher than those of glutathione (GSH) (ABTS·: 71.12±3.58%, 67.63±1.65% and 68.51±0.54% by WP5, LW5 and YY6, respectively, vs 61.51±1.02% by GSH; ·OH: 52.15±1.99%, 51.25±1.29% and 53.06±2.23% by WP5, LW5 and YY6, respectively, vs 42.69±1.18% by GSH). The modified peptides can effectively penetrate cell membrane and significantly enhance cell viability against UVB-induced oxidative stress in human keratinocyte (HaCaT) cells by reducing the levels of reactive oxygen species and malondialdehyde and increasing the activity of intracellular antioxidant enzymes, including superoxide dismutase and glutathione peroxidase. Additionally, the modified peptides decreased the expression of tumor necrosis factor-α, interleukin-6 and interleukin-1β in UVB-induced cell inflammatory response, exhibiting a potent anti-inflammatory activity. Further investigation into the molecular mechanism revealed that the modified peptides not only decreased cell apoptosis by down-regulating the apoptosis factors Bax/Bcl-2 and c-PARP, but also increased the antioxidant capacity of HaCaT cells by interrupting the interaction between Kelch-like ECH associated protein 1 (Keap1) and nuclear factor erythroid 2-related factor 2 (Nrf2), and ultimately promoting Nrf2 activation. The findings suggest a promising strategy for accelerating the discovery of antioxidant peptides and cell-penetrating peptides, providing valuable insights for pharmaceutical and cosmetic industries.

Global Competitiveness Potential of U.S. Nuclear Energy Technologies

The new Trump administration considers the U.S. nuclear energy industry as one of the most important and promising tools for maintaining the country’s global leadership in the international arena. In order to assess the validity of these calculations, this paper provides a retrospective analysis of the development of U.S. nuclear industry, identifies its strengths and weaknesses and the overall state as D. Trump is about to enter his second term. The first section outlines the key stages and drivers of the U.S. nuclear energy industry evolution in the second half of the 20th century. The author notes that the development of the industry was steadily slowing down after a period of rapid growth in the 1960–1970s due to both purely economic reasons and extraordinary factors, including the accident at the Three Mile Island nuclear power plant. The second section compares the approaches of the administrations of George W. Bush, B. Obama, D. Trump and J. Biden to regulating the national nuclear energy industry. The research shows that, despite active government support of the industry, the trend towards a ‘nuclear renaissance’ emerged only with D. Trump's coming to power, as he set a course to restore the competitiveness of the country’s nuclear industry and establish dominance in this segment of international energy market. The author concludes that the U.S. nuclear energy technologies have significant potential in terms of strengthening the country’s global competitiveness, which, in particular, became possible thanks to the policy of the last two administrations to subsidize and technologically upgrade the nuclear industry, as well as to develop new markets in Europe and Asia. At the same time, as the author notes, there are still certain capacity constraints, related, in particular, to the disposal of spent nuclear fuel and the transition to cost-effective production of small modular reactors.

Recommender system ethics from Turkish academics’ perspective: a Q-methodology inquiry

Purpose This study aims to uncover the trends in Turkish experts’ views on the ethical concerns surrounding recommendation systems that use machine learning. Design/methodology/approach This study used a Q-methodology approach. To apply Q-methodology, a document review was first conducted as a meta study of meta studies. Then, to create a Q-set, semi-structured interviews were conducted with ten experts. Finally, the Q-methodology was conducted with 42 academics. Findings Turkish academics have diverse perspectives on the ethics of recommender systems. All groups agree on the importance of safeguarding user data and ensuring its ethical use, including concerns about data confidentiality and security and preventing data from being sold, stolen or monopolized by companies. Individualistic thinkers believe that recommendation systems have a minimal impact on social issues, such as polarization and inequality, and argue that users benefit from these services. Social thinkers emphasize the need to understand how these systems work and hold individuals accountable for their actions. Anxious thinkers are concerned about the potential for human rights violations and unfair competition through biased algorithms and agree that companies should not be the sole focus of regulations. Originality/value To the best of the author’s knowledge, no study has investigated Turkish academics’ thoughts on AI ethics. It is also rare for research to be conducted methodologically using the Q-methodology. Although the findings are based on a recommender system, the results can be generalized to all machine learning systems.

How many bees fit in the city? A spatial ecological case study to conserve urban wild bees

Pollination is crucial for biodiversity and food security, with bees playing a significant role. The growing popularity of urban beekeeping is leading to increasing honeybee densities in cities, raising concerns about competition for pollen and nectar with wild bees due to limited foraging resources in densely urbanized areas. To assess the current bee occurrences of wild and honeybees in urbanized and protected areas of a Central European city, we focused on the ecological similarities between honeybees and wild bees. We compiled an inventory of 462 wild bee species documented since 1990 in Vienna (Austria) and conducted a survey of apiary locations in cooperation with beekeepers. We calculated apiary densities and indices for species richness, rarity, and, based on flower-visiting traits, the trait similarity between honeybees and wild bees. We found that approximately four times more honeybee colonies were kept in central Vienna in 2023 than the habitat may support. In parts of Vienna’s nature conservation areas, the number of colonies also exceeded the density of 3.5 colonies per km² recommended by the literature. Results indicate a significant spatial overlap of high apiary densities and wild bee hotspots, particularly in urban nature conservation areas like Natura 2000 protected areas. In Natura 2000 areas, the trait similarity of rare wild bee species was significantly increased, indicating a potential elevated competition between wild bees and honeybees for floral resources. This study highlights the need for spatial planning to balance urban beekeeping and wild bee conservation, recommending actions to match habitat quality to apiary densities to mitigate competitive pressures.

Exploring Competitive Relationship Between Haemophilus parainfluenzae and Mitis Streptococci via Co-Culture-Based Molecular Diagnosis and Metabolomic Assay

Various bacterial strains with nitrate-reducing capacity (NRC), such as Haemophilus, Actinomyces, and Neisseria, are known to promote NH3 production, control pH in the oral cavity, and inhibit the growth of aciduric bacteria. However, experimental evidence on various estimated bacterial networks within the salivary microbiome is insufficient. This study aims to explore potential bacterial compositional competition observed within saliva samples from dental caries patients through a co-culture assay of mitis Streptococci, which is a primary colonizer in the salivary microbiome, and nitrate-reducing bacteria Haemophilus parainfluenzae. We investigated bacterial growth efficiency change by co-culture time using the qRT-PCR method. In addition, we applied LC/Q-TOF-based metabolites screening to confirm metabolic interactions between oral bacterial species and their association with dental caries from a metabolomics perspective. As a result, we first found that the nitrate reduction ability of H. parainfluenzae is maintained even in a co-culture environment with the mitis Streptococci group through a nitrate reduction test. However, nitrate reduction efficiency was hindered when compared with monoculture-based nitrate reduction test results. Next, we designed species-specific primers, and we confirmed by qRT-PCR that there is an obvious competitive relationship in growth efficiency between H. parainfluenzae and two mitis Streptococci (S. australis and S. sanguinis). Furthermore, although direct effects of nitrate reduction on competition have not been identified, we have potentially confirmed through LC/Q-TOF-based metabolite screening analysis that the interaction of various metabolic compounds synthesized from mitis Streptococci is driving inter-strain competition. In particular, we constructed a basic reference core-metabolites list to understand the metabolic network between each target bacterial species (H. parainfluenzae and mitis Streptococci) within the salivary microbiome, which still lacks accumulated research data. Ultimately, we suggest that our data have potential value to be referenced in further metagenomics and metabolomics-based studies related to oral health care.

Competitive Potential of Stable Biomass in Poland Compared to the European Union in the Aspect of Sustainability

Biomass is the primary source of renewable energy in Poland. Its share in renewable energy production in Poland has decreased in recent years, but it still maintains a nearly 70% share. Poland has extensive forest and straw resources, such as pellets, which can be used for stable biomass production. The main objective of this research was to understand the potential of plant biomass production for energy purposes in Poland and other European Union (EU) countries in terms of sustainable development. The period of analysis covered 2000–2022. Secondary data from Statistical Poland and Eurostat were used. The primary research method was the Augmented Dickey–Fuller (ADF) test, which aimed to check the stationarity of stable biomass. Moreover, we calculated the Vector Auto-Regressive (VAR) model, which was used to develop the forecast. The indigenous production of solid biomass in 2022 decreased to 363,195 TJ, while in 2018, it was 384,914 TJ. Our prognosis confirms that biomass will increase. The prognosis based on the VAR model shows an increase from 365,395 TJ in 2023 to 379,795 (TJ) in 2032. Such countries as France, Germany, Italy, Spain, Sweden, and Finland have a bigger potential for solid biomass production from forests because of their higher area. As a result, Poland’s biomass production competitiveness is varied when compared to other EU nations; it is lower for nations with a large forest share and greater for those with a low forest cover. The two main benefits of producing solid biomass are its easy storage and carbon dioxide (CO2) neutrality. The main advantage is that solid biomass preserves biodiversity, maintains soil fertility, and improves soil quality while lowering greenhouse gas emissions and environmental pollutants. The ability to leave added value locally and generate new jobs, particularly in troubled areas, is the largest social advantage of sustained biomass production.

The Response Patterns of Non-Native Rotifer Species Kellicottia bostoniensis (Rousselet, 1908) to Environmental Factors and Its Relationship with Potential Competitors and Predators

Kellicottia bostoniensis is a rotifer species originating from North America, with numerous reports documenting its spread to Europe and South America. Meanwhile, in Asia, the occurrence of this non-native species has been scarcely documented, but its presence was recently reported in Korea in 2020. In Korea, the close geographic proximity of artificial reservoirs within a small area is expected to make the region vulnerable to the spread of K. bostoniensis. Therefore, it is deemed necessary to study the spatio-temporal distribution of K. bostoniensis, which appears to have extensively proliferated across the region, and its relationship with environmental factors. We analyzed the response of K. bostoniensis occurrence to environmental factors and aimed to compare its response patterns with those of potential competitor and predator groups, which were classified based on a functional group approach. This study, conducted on 12 small lakes located under similar climatic conditions, revealed that the response of K. bostoniensis to variables representing the trophic state of the lakes differed from those of the potential competitor and predator groups. The study sites, encompassing a wide range of trophic states from oligotrophic to hypereutrophic, across various lakes and survey periods, were well-suited for examining these relationships. Furthermore, when TSI was calculated to compare the abundance of K. bostoniensis and potential competitors across trophic conditions, the abundance of potential competitors was proportional to TSI. In contrast, K. bostoniensis exhibited higher abundances in mesotrophic and lower eutrophic environments, which distinguished it from its competitors. Our results indicate that the impact of introduced K. bostoniensis on native communities is minimal, while the resistance of native communities through the biological filter based on biological interactions is ineffective against this non-native rotifer species. This provides key evidence for explaining the widespread distribution of K. bostoniensis across continents.

Interspecific Competition Between Eotetranychus sexmaculatus Riley and Oligonychus biharensis Hirst (Acari: Tetranychidae).

Eotetranychus sexmaculatus has long been recognized as an important spider mite pest of rubber trees. Recently, increasing damage from Oligonychus biharensis has elevated its importance as a key spider mite pest. These two species share highly overlapping ecological niches, with outbreaks strongly associated with high temperatures and drought stresses. However, little is known regarding the potential competition between these spider mite species and the role of temperature in shaping these interactions. This study investigates the development and reproduction of E. sexmaculatus and O. biharensis at varying population densities, and evaluates their dynamics at 27 °C, 30 °C, and 33 °C. Five initial population densities of E. sexmaculatus and O. biharensis were evaluated in mixed populations: 0:30, 10:20, 15:15, 20:10, and 30:0. The results demonstrate both intra- and interspecific competition between E. sexmaculatus and O. biharensis. At all three intraspecific densities, the survival rate and lifespan of both species declined as density increased, with fecundity also decreasing at higher densities. Single-species populations of each mite were larger in number when compared with mixed populations. Across all treatments, the mean and peak values of the intrinsic rate of increase (rm) were greater in O. biharensis than in E. sexmaculatus. Additionally, increasing temperatures accelerated the displacement of E. sexmaculatus by O. biharensis, regardless of the initial population density. When the mixed populations of E. sexmaculatus and O. biharensis were at densities of 10:20, the highest interspecific competition coefficients were obtained at 33 °C, with values of 0.6591. In conclusion, O. biharensis consistently outcompeted E. sexmaculatus at all tested temperatures, irrespective of initial densities, providing valuable insights into the competitive dynamics of dominant rubber tree pests.

DSB's General Rules in Dealing with Tariffs on Similar Imported Products and Their Implications for Domestic Practices: Taking the WTO Chilean Wine Duty Case as an Entry Point

The principle of national treatment ensures that foreign nationals receive(natural persons, legal persons, or things) economic treatment comparable to that given to a states nationals. In international trade, national treatment is reflected primarily in the taxation of imported goods of the same kind (including but not limited to substitutable and directly competitive goods). A lack of uniform standards exists in defining similar goods, and the WTO Dispute Settlement Body (DSB) mainly considers the identification of similar products in terms of their use, substitution elasticity, physical characteristics, consumer preferences, sales channels, prices, tariff categories, etc., and at the same time, it needs to take into account the potential competition. On the other hand, the identification of different taxes is mainly based on the different tax principle, and the determination of different taxation is mainly judged by whether it is more than a minor difference and whether it provides protection for domestic production. This lack of codified standards contributes to disputes regarding the application of the national treatment principle. Through the introduction and analysis of the Chilean Wine Duty case combined with the opinions of the Panel and the Appellate Body, this paper will try to draw the general rules of the DSB in dealing with similar cases, and use them to guide China's future practice, to playing the role of a large developing country on the road of international trade

Feeding Habits and Individual Specialization in Adult Female South American Sea Lions (Otaria flavescens) in Patagonia

Studying trophic feeding habits and their variation over time is crucial for understanding individual and population success. Although many generalist feeders’ populations appear to use diverse trophic resources, they are often composed of individuals that specialize in only a subset of these resources, a phenomenon known as individual trophic specialization (ITS). The South American sea lion (SASL) (Otaria flavescens), widely distributed along the South American coast, is an opportunistic and generalist predator with a diverse diet, making it a good model for studying ITS. We aimed to estimate the diet composition and the degree of ITS among SASL females on Isla Arce, Argentina, over a period of three years (2012 to 2014). For that, we analysed stable isotopes (δ15N and δ13C) in vibrissae from 12 females. Over the three years studied, females from this colony primarily fed on pelagic prey. At the population level, the most commonly consumed prey varied between the Argentine anchovy (Engraulis anchoita) in 2012 and 2014 and the Patagonian squid (Doryteuthis gahi) in 2013. Consuming mostly pelagic resources throughout the year, unlike previous studies in nearby colonies, suggests the existence of different foraging strategies in lactating females. Although the prey contribution varied between years, the analysis indicated that SASL females breeding on Isla Arce show some degree of ITS, which could be a mechanism adopted by individuals to mitigate the potential competition given by sustained population increases.

Interactions Between Woolly Whiteflies and Their Parasitoid Wasp: Development, Competition, and Reproductive Potential

Interactions Between Woolly Whiteflies and Their Parasitoid Wasp: Development, Competition, and Reproductive Potential

Reporting the others’ speech, uncovering China’s world dream

Abstract It has been over ten years since the Chinese Dream was proposed by President Xi Jinping in 2012. This study investigates the representations of the Chinese Dream in The New York Times (hereafter NYT) from the perspective of speech reporting. The analysis shows that four types of sources are favored: the political elites from the Chinese government, ordinary Chinese citizens, western scholars, and Chinese news agencies. Government officials’ speech is quoted to expose the global ambition of the Chinese-Dream-associated policies or practices, while stories from the ordinary Chinese provide contradictory evidence. Scholars’ speech is to warn audiences of the Chinese government’s global aspirations masked by the Chinese Dream. The reports and practices of Chinese news agencies are labeled propaganda to strangle potential discursive competition. In effect, all converge to strengthen and validate China’s world dream representation.

Artificial lemming algorithm: a novel bionic meta-heuristic technique for solving real-world engineering optimization problems

The advent of the intelligent information era has witnessed a proliferation of complex optimization problems across various disciplines. Although existing meta-heuristic algorithms have demonstrated efficacy in many scenarios, they still struggle with certain challenges such as premature convergence, insufficient exploration, and lack of robustness in high-dimensional, nonconvex search spaces. These limitations underscore the need for novel optimization techniques that can better balance exploration and exploitation while maintaining computational efficiency. In response to this need, we propose the Artificial Lemming Algorithm (ALA), a bio-inspired metaheuristic that mathematically models four distinct behaviors of lemmings in nature: long-distance migration, digging holes, foraging, and evading predators. Specifically, the long-distance migration and burrow digging behaviors are dedicated to highly exploring the search domain, whereas the foraging and evading predators behaviors provide exploitation during the optimization process. In addition, ALA incorporates an energy-decreasing mechanism that enables dynamic adjustments to the balance between exploration and exploitation, thereby enhancing its ability to evade local optima and converge to global solutions more robustly. To thoroughly verify the effectiveness of the proposed method, ALA is compared with 17 other state-of-the-art meta-heuristic algorithms on the IEEE CEC2017 benchmark test suite and the IEEE CEC2022 benchmark test suite. The experimental results indicate that ALA has reliable comprehensive optimization performance and can achieve superior solution accuracy, convergence speed, and stability in most test cases. For the 29 10-, 30-, 50-, and 100-dimensional CEC2017 functions, ALA obtains the lowest Friedman average ranking values among all competitor methods, which are 1.7241, 2.1034, 2.7241, and 2.9310, respectively, and for the 12 CEC2022 functions, ALA again wins the optimal Friedman average ranking of 2.1667. Finally, to further evaluate its applicability, ALA is implemented to address a series of optimization cases, including constrained engineering design, photovoltaic (PV) model parameter identification, and fractional-order proportional-differential-integral (FOPID) controller gain tuning. Our findings highlight the competitive edge and potential of ALA for real-world engineering applications. The source code of ALA is publicly available at https://github.com/StevenShaw98/Artificial-Lemming-Algorithm.

A Financial Analysis of Valuation Forecast of Chongqing Chuanyi Automation

As a basic and strategic high-tech industry of the national economy, the instrumentation industry plays a very important role in promoting industrial transformation and upgrading, developing strategic emerging industries, and ensuring and improving people's living standards. Instrumentation is also an important part of major equipment and an important device for realizing industrial informatization and intelligent manufacturing. The industrial structure of China's instrumentation industry is in a stage of gradual upgrading. This article focuses on the recent operating conditions and future development prospects of Chongqing Chuanyi Automation Co,. Ltd (Hereinafter referred to as CQCY), a leading enterprise in the industry. Combining external conditions such as the macroeconomic environment and national policy adjustments with the company's endogenous factors, this article predicts key indicators such as its future operating income, gross profit margin, interest rate, and capital turnover. This article further analyzes the sustainable operating capacity of CQCY and finds that the company is in good condition in terms of liquidity, debt repayment ability and profitability, which confirms that CQCY still has strong market competitiveness and development potential in the industry. This article provides a reference case for enterprises in the instrumentation field, especially in the industrial automatic control system device manufacturing industry, to assess whether their financial status is healthy and good, which has certain reference significance.

Population dynamics of the nonnative damselfish Neopomacentrus cyanomos and its potential competitors on coral reefs in the southern Gulf of Mexico

Introductions of nonnative species are known to negatively impact coral reef ecosystems. The planktivorous Indo-Pacific damselfish Neopomacentrus cyanomos has spread throughout the Gulf of Mexico (GoM) over the past decade. However, its population dynamics and potential adverse effects on native reef-fish communities have not been assessed. Here, we examined temporal change in the occurrence, density, and social-group size of N. cyanomos on reefs in the southern GoM and assessed its possible impact on native species by (i) modeling the occurrence and densities of N. cyanomos and syntopic native fish species and (ii) evaluating differences in the species composition of the broader reef-fish community on the Veracruz reef system (PNSAV) before and after N. cyanomos established there. Neopomacentrus cyanomos became more widely dispersed and abundant on PNSAV reefs from 2014 to 2021. Between 2006 and 2013 seven native fishes (four planktivores and three nonplanktivores) on PNSAV reefs experienced varying population trends. However, from 2014 onwards, populations of those seven species declined, although the 162-species PNSAV reef-fish community did not exhibit notable shifts in species composition. Our results indicate that while N. cyanomos has become an increasingly common inhabitant of reefs in the southwestern GoM, it has had no measurable impact on native planktivorous fishes. Instead, changes in the populations of native species are likely related to the increasing habitat degradation of reefs immediately adjacent to a large city experiencing expanding industrial development. Detailed and mechanistic explorations are required to determine if N. cyanomos has negative ecological effects on wider Caribbean reefs.

Narrow Dietary Niche With High Overlap Between Snow Leopards and Himalayan Wolves Indicates Potential for Resource Competition in Shey Phoksundo National Park, Nepal.

Understanding species' dietary ecology and interspecific interactions is crucial for multi-species conservation planning. In Central Asia and the Himalayas, wolves have recolonized snow leopard habitats, raising considerable concern about resource competition between these apex predators. Using micro-histological analysis of prey species remains (e.g., hair) in their fecal samples, we determined the prey composition, dietary niche breadth, and the extent of diet overlap between these two apex predators in Shey Phoksundo National Park, Nepal. We analyzed 152 scat samples collected along 89 survey transects from April to June 2021. Our findings reveal a significant overlap in their diets (Pianka's index = 0.93), with snow leopard and wolf scats containing the remains of 11 and 10 prey species, respectively. However, the interspecific difference in prey selection was apparent, with significant deviations between observed and expected prey use indicating non-random prey selection relative to availability: Snow leopards exhibited a higher occurrence of wild prey items in their diet (55.28%), primarily blue sheep (Pseudois nayaur) (24.83%), whereas wolves relied predominantly on domestic livestock (67.89%), with goats (Capra hircus) accounting for over one-fourth of their diet (29.15%). Yaks (Bos grunniens) comprised a significant portion of the biomass consumed by both predators, with higher for wolves (43.68%) than snow leopards (36.47%). Overall, the narrow dietary niche breadth with high overlap indicates potential resource competition between snow leopards and wolves. However, a comprehensive understanding of resource competition will require further study on other axes of niche partitioning, including habitat and time. Nevertheless, the region's low prey richness means that, with increasing human influence, any reduction in wild prey or increase in livestock could intensify competition between snow leopards and wolves, which could have implications for livestock depredation.

A targeted reformulation of safflower oil: Enhancing anti-inflammatory potential and market competitiveness through ω3 enrichment

A targeted reformulation of safflower oil: Enhancing anti-inflammatory potential and market competitiveness through ω3 enrichment

Structural modulated NH4V4O10 cathode materials for low temperature zinc ion storage devices

With the characteristics of nontoxicity and environmental benignity, aqueous zinc ion batteries (AZIBs) are rapidly emerging as potential competitors for high-performance energy storage systems. Nevertheless, several issues hinder their further...

Highly sensitive and selective detection of SARS-CoV-2 spike protein S1 using optically-active nanocomposite-coated melt-blown masks.

Detection of viruses, including coronavirus (SARS-CoV-2), via facile, fast, and optical methods is highly important to control pandemics. In this regard, optically-active nanomaterials and nanoparticles (NPs) are a wise choice due to their long-term stability, ease of functionalization, and modifications. In this work, a nanocomposite based on NiFe layered double hydroxide (LDH) and ZIF-67 metal-organic framework (MOF) was designed and synthesized, and decorated on the surface of the melt-blown mask. The developed nanocomposite has a fluorescence emission at 625nm. The selectivity of the nanocomposite towards the SARS-CoV-2 spike protein S1 was increased by adding CuO NPs. The limit of detection (LOD) of 1.5nM and 24.5nM against SARS-CoV-2 spike protein S1 was recorded by NiFe LDH@ZIF-67@CuO nanocomposite, and NiFe LDH@ZIF-67@CuO decorated on the surface of melt-blown. Also, in the presence of potential competitors and other types of pathogens, including Influenza virus types A and B, Staphylococcus aureus bacteria, and even cations/macromolecules, the fluorescence intensity changes had more than 40% difference.