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Urease enzymes from plants are directly utilised in enzyme-induced calcite precipitation (EICP) to catalyse calcium carbonate (CaCO3) precipitation between soil particles to improve their strength and stiffness. EICP does not require microbial culture and may be applicable for finer soils with their smaller size. However, most studies on EICP utilise purified urease enzymes, which are often rare, expensive and limited to food-grade beans or seeds, making the technique less cost-effective. To find alternative and cheaper sources, crude urease extracts from diverse plant species, particularly weeds and Australian native plants, were obtained, identified and characterised using a series of in vitro experiments. All selected plant species contain a considerable amount of urease enzyme, exhibiting different urease activity and calcium carbonate precipitation. EICP treatment by different crude extracts showed different levels of hydraulic conductivity, unconfined compressive strength (UCS), wind and raindrop erosion resistance. However, the crude extract from an Australian weed, matured paddy melon seeds (M-PMS), had the highest specific activity of 8997 U/mg and was further used for EICP treatment of six different soil types. The UCS of treated soils was influenced by the soil types. For similar calcium carbonate content, the strength and stiffness of the EICP-treated specimens were significantly influenced by the confining stress and degree of saturation in undrained triaxial conditions. Also, the mass loss, strength and average calcium carbonate decreased with increasing cycles of wetting–drying, freezing–thawing and elevated temperature. When compared with purified urease enzyme, M-PMS produced comparable strength and durability resistance in the treated samples. [ABSTRACT FROM AUTHOR]

Microbial- or enzyme-induced calcium carbonate (CaCO3) precipitation (MICP and EICP) are relatively new ground improvement techniques. In this study, the mechanical behaviour of biotreated (MICP/EICP) and untreated sands was investigated in light of the critical state soil mechanics framework using a series of direct simple shear (DSS) tests. A wide range of calcium carbonate content (CC), initial void ratio after consolidation (e0) and effective initial normal stress ( σ ′ N 0 ) was considered. The biotreated specimens showed improved shear strength and dilative tendency compared to untreated specimens with similar initial states. The ultimate state (US) for the biotreated sand shifted towards a smaller void ratio (e) than the value of e at the critical state of untreated sand at the same σ′N in e–log σ′N space. Compared to untreated sand, a significantly larger US stress ratio was achieved for the biotreated sand, particularly at high CC and low σ ′ N 0 . The characteristic features of undrained behaviour, such as instability stress ratio, stress ratio at phase transformation and flow potential showed good relationships with modified initial state parameter, void ratio after biotreatment and CC. The bonding ratio, (τ/σ′N)bond, was used to quantify the interparticle bonding. The peak value of (τ/σ′N)bond for the biotreated sand was significantly larger than zero, particularly at high CC and low σ ′ N 0 , while the peak (τ/σ′N)bond for the untreated sand was negligible. It was also observed that the mobilisation and degradation of calcium carbonate bonds in biotreated sand during DSS shearing are influenced by both CC and σ ′ N 0 . [ABSTRACT FROM AUTHOR]

This investigation evaluated the therapeutic benefit of apocynin in isoproterenol (ISO)‐induced cardiac damage in rats. ISO‐administered male Wistar rats were treated with apocynin for 2 weeks. Blood plasma and left ventricle of heart tissues were collected and analyzed for oxidative stress‐related parameters such as malondialdehyde (MDA), advanced oxidation protein product (AOPP), and nitric oxide (NO). The activities of endogenous antioxidant enzymes such as superoxide dismutase (SOD) and catalase were also measured. The gene expressions of oxidative stress‐related proteins such as Nrf‐2, HO‐1, and HO‐2 in cardiac tissues were also measured. In silico studies like molecular docking and molecular dynamics were also performed to detect how apocynin interacts with NADPH and nitric oxide synthase at the molecular level. This investigation revealed significant elevation of serum transferase enzymes and creatinine kinase‐Muscle Brain (CK‐MB) activities in ISO‐administered rats compared to the control. Apocynin effectively normalized the serum transferases and CK‐MB activities in the blood of ISO‐stressed rats. Moreover, ISO‐induced elevations of MDA, NO, and AOPP levels were also suppressed by apocynin treatment. Consistently, apocynin restored the reduced SOD and catalase activities in ISO‐administered rats. This restoration of enzyme activity might be due to the increased expression of Nrf‐2 and HO‐1 and reduced expression of iNOS and TNF‐α in ISO‐administered rats. Histological analysis revealed that apocynin treatment ameliorated the mononuclear cell adherence and fibrosis in the cardiac tissue of ISO‐administered rats. Computational studies also support the experimental findings. This study demonstrates that apocynin prevents ISO‐induced cardiac injury not only by preventing inflammation but also by empowering the antioxidant defense system. [ABSTRACT FROM AUTHOR]

A comprehensive study of a novel structure for In2S3 based CIGS solar cell has been observed. The effects of the absorber layer and temperature with various back surface field (BSF) layers (SnS/SnTe/MoTe2/GeTe) are analyzed with the SCAPS‐1D simulator. Performances of the ultrathin CIGS solar cell enhanced with the proposed structure of ZnO:Al/i‐ZnO/In2S3/CIGS/BSF/Mo and efficiency reached over 24% with 1000 nm CIGS absorber layer. The cell with SnS BSF layer has obtained 24.41% efficiency but shows less stability with temperature variation. On the other hand, the cell with MoTe2 BSF shows better stability at a higher temperature and reached an efficiency of 24.14%. Besides, the cell with SnTe BSF also suitable for ultrathin In2S3/CIGS, which results in an efficiency of 23.27%. However, the cell with GeTe BSF can give just over 18% efficiency, but it shows greater stability with temperature changes. This study highlights the potential of BSF layer in In2S3/CIGS solar cell enhancing the performance and stability of cells by reducing recombination losses. The incorporation of a 50 nm BSF layer allows further thinning of the absorber layer, reducing material consumption in the fabrication process without sacrificing overall efficiency. [ABSTRACT FROM AUTHOR]

The anisotropic microstructure of granular materials has a profound effect on their macroscopic behaviour and can be characterised using a fabric tensor. To include of fabric in the critical state theory (CST), anisotropic critical state theory (ACST) was proposed by modifying the state parameter (ψ) of CST to a fabric-dependent dilatancy state parameter (ζ) . Noteworthy that ψ showed a very strong correlation with characteristic features (e.g. instability, phase transformation and characteristic state) of macroscopic behaviour and, as a result, it has been adopted in many constitutive models. While ζ aided the inclusion of fabric in ACST models, the correlation between ζ and characteristic features has not been evaluated in detail yet, although a large number of works are found on micromechanics and fabric only. In this study, a large number of discrete element method simulations for drained and undrained triaxial were conducted to evaluate the correlation between ζ and characteristic features. To this purpose, the correlation between stress ratio and both classic and dilatancy state parameter (ψ and ζ ) were studied in important characteristic features (e.g. instability, phase transformation and characteristic state). It was found that this correlation was improved using ζ which might be due to the inclusion of fabric in our model. This observation is new and significant for inclusion of fabric evolution in constitutive modelling. [ABSTRACT FROM AUTHOR]

In the present study, the undrained cyclic behaviour of biotreated sands using microbial and enzyme-induced carbonate precipitation was investigated for a wide range of initial void ratio after consolidation ( e 0 ), initial effective normal stress ( σ N 0 ′ ) and calcium carbonate content (CC) under direct simple shear (DSS) testing conditions. The critical state soil mechanics framework for untreated sand was first established using a series of drained and undrained (constant volume) tests, which served as a benchmark for evaluating the undrained cyclic liquefaction behaviour of untreated and biotreated sands. The results indicated that the modified initial state parameter ( ψ m 0 ) in DSS condition showed a good correlation with instability states and phase transformation under monotonic shearing. In undrained cyclic DSS loading condition, samples displayed cyclic mobility indicated by an abrupt accumulation of large strain or σ N 0 ′ transiently reaching zero or a sudden build-up of excess pore water pressure. The linkage between static and cyclic liquefaction was established for untreated and biotreated sand specimens based on the equivalence of characteristic soil states. The number of cycles before liquefaction (NL) for the biotreated sand specimens was mainly controlled by the cyclic stress ratio, e 0 , σ N 0 ′ and CC. For a similar initial state prior to undrained cyclic loading, the biotreated specimens required a larger NL compared to the untreated sand. The cyclic resistance ratio at NL = 15 (CRR15) increased with decreasing ψ m 0 for the untreated sand, while the CRR15 for biotreated sand increased with increasing CC and decreasing σ N 0 ′ . [ABSTRACT FROM AUTHOR]

Immigrant organisations tend to engage with immigrant communities within a host country and their country of origin through various transnational activities. This study explores the emergence of immigrant organisations among new immigrant groups in the United States by shedding light on opportunity structure, group characteristics, and collective engagement. Empirically, this paper draws upon interviews of 33 Bangladeshi immigrant organisations in the United States. This paper reports that the intersection of opportunity structure and group characteristics creates a favourable environment for the emergence of immigrant organisations within a new immigrant group. This research suggests that local engagement is a process of adapting to a new environment while still holding onto the cultural norms and values of one's home country, and transnational engagement improves the lives of the marginalised people in their country of origin. [ABSTRACT FROM AUTHOR]

By selecting appropriate microhabitats, animals gain various benefits. For amphibians, which are ectothermic, appropriate microhabitat selection is directly related to their survival. This study aims to characterize the microhabitat type selected by Bufo gargarizans in South Korea, which has not yet been examined, using radiotelemetry. We analyzed the percent cover of different microhabitat features at sites where B. gargarizans was found. The microhabitat was categorized into eight types: stacked dry leaves litter or hay, grass, naked field, stones/pebbles, fallen branches, alive or dead trees/shrubs, wetland, and other. We collected a total of 60 location data, all of which had closed cover. From these, nine hibernation sites and six post-breeding dormancy sites were identified. Dry leaf litter was found to be the most frequently selected microhabitat type. We also found significant differences in microhabitat type between the hibernation period and the post-breeding dormancy period. We considered that these differences can be explained by the ecological characteristics of B. gargarizans. [ABSTRACT FROM AUTHOR]

Background: Cameroon is among countries that have made notable investments nationwide in line with the Family Planning 2030 initiative. This study examines the progress made across the 10 regions and 58 divisions of the country, including potential impairments following COVID-19 and armed conflict. Methods: In this time-series analysis, parameters were sourced from 5 Demographic and Health Surveys and 3 Multiple Indicator Cluster Surveys conducted between 1991 and 2018. The Family Planning Estimation Tool (FPET) was used to estimate key family planning indicators among married women of reproductive age. Data from official country reports and FPET results were incorporated into Bayesian models to assess how projections (from 2020 to 2030) would vary given varying contractions (i.e., 0%, 5%, 10%, and 25% annually) to services coverage. Results: Nationally, modern contraceptive prevalence rate (mCPR) and demand satisfied with modern (contraceptive) methods reached 16.8% (95% credible interval 12.0 to 23.0) and 37.6% (28.7 to 47.0), respectively; and unmet need for modern methods decreased to 27.9% (22.9 to 33.7) in 2022. Notable improvements were observed in the East region and Boumba et Ngoko division, with annual mCPR trends of 2.1 percentage points (%p) (− 0.2 to 4.2) and 7.0%p (4.5 to 9.3) from 2015–2020; and 2030 projections of 58.7% (41.3 to 74.0) and 79.1% (65.0 to 89.0), respectively. The least performing in terms of demand satisfied with modern methods include Adamawa at the regional and Boyo at the divisional level, with 2030 projections of 45.5% (26.5 to 65.1) and 0.4% (0.2 to 0.8), respectively. The northern regions (Adamawa, Far North, and North) recorded the lowest levels of unmet need for modern methods. To achieve ≥ 75% demand satisfied with modern methods in 2030, an additional 1.4 (0.6 to 2.2) million modern contraceptive users are required. Given large reductions (− 25% annually) in services coverage post-COVID-19/armed conflict (2020 to 2030), the South region could experience the most significant contraction in projected mCPR, with a decrease of − 9.2%. Conclusions: Family planning outcomes vary significantly across subnational territories of Cameroon. While the East region shows notable success, greater attention is needed in the northern regions. Strategies must be adaptive to address unprecedented emergencies that may disrupt access to services. [ABSTRACT FROM AUTHOR]

Seafood is one of the most traded food commodities in the world. Traditionally, frozen seafood is evaluated using destructive chemical methods, which are complicated and time-consuming. Therefore, this study proposed a noninvasive method for evaluation of frozen seafood, focusing on fluorescence fingerprints (FFs). FFs, also known as an excitation–emission matrix (EEM), refer to an arranged fluorescence spectrum of emission stimulated by different excitation wavelengths. As FFs is a set of fluorescence spectra acquired at consecutive excitation wavelengths, it produces a three-dimensional diagram that is composite fluorescence of every fluorophore, similar to a fingerprint. Compared with conventional fluorescence spectroscopy, the FFs technique can measure complex samples that contain many fluorophores, because it includes emission spectra excited at many different excitation wavelengths. In this review, the applications of FFs technology for nondestructive prediction of seafood quality are summarized. Postmortem metabolism and seafood freshness indices are discussed comprehensively. We have also introduced multidimensional fluorescence imaging, a combination of FFs and imaging techniques for visualizing seafood product quality. Finally, the advantages of the FFs technique for nondestructive evaluation of seafood quality, even at the frozen state, over traditional methods and previous fluorescent spectroscopic techniques are enumerated. [ABSTRACT FROM AUTHOR]

Background: The lack of appropriate prognostic biomarkers remains a significant obstacle in the early detection of Head and Neck Squamous Cell Carcinoma (HNSCC), a cancer type with a high mortality rate. Despite considerable advancements in treatment, the success in diagnosing HNSCC at an early stage still needs to be improved. Nuclear factor erythroid 2-related factor 2 (Nrf2) and Sonic Hedgehog (Shh) are overexpressed in various cancers, including HNSCC, and have recently been proposed as possible therapeutic targets for HNSCC. Circulating Tumor Cell (CTC) is a novel concept used for the early detection of cancers, and studies have suggested that a higher CTC count is associated with the aggressiveness of HNSCC and poor survival rates. Therefore, we aimed to establish molecular markers for the early diagnosis of HNSCC considering Shh/Nrf2 overexpression in the background. In addition, the relation between Shh/Nrf2 and CTCs is still unexplored in HNSCC patients. Methods: In the present study, we selected a cohort of 151 HNSCC patients and categorized them as CTC positive or negative based on the presence or absence of CTCs in their peripheral blood. Data on demographic and clinicopathological features with the survival of the patients were analyzed to select the patient cohort to study Shh/Nrf2 expression. Shh and Nrf2 expression was measured by qRT-PCR. Results: Considering significant demographic [smoking, betel leaf (p-value < 0.0001)] and clinicopathological risk factors [RBC count (p < 0.05), Platelet count (p < 0.05), Neutrophil count (p < 0.005), MCV (p < 0.0001), NLR (p < 0.05), MLR (p < 0.05)], patients who tested positive for CTC also exhibited significant overexpression of Shh/Nrf2 in both blood and tissue compared to CTC-negative patients. A strong association exists between CTCs and tumor grade. Following chemotherapy (a combination of Cisplatin, 5FU, and Paclitaxel), the frequency of CTCs was significantly decreased in patients with HNSCC who had tested positive for CTCs. The Kaplan–Meier plot illustrated that a higher number of CTCs is associated with poorer overall survival (OS) in patients with HNSCC. Conclusions: Detecting CTCs, and higher expression of Shh and Nrf2 in HNSCC patients' blood, can be a promising tool for diagnosing and prognosticating HNSCC. [ABSTRACT FROM AUTHOR]

Purpose: Entrepreneurship education (EE) through innovative teaching techniques (ITEE) and entrepreneurial intention (EI) are two essential components of entrepreneurship development. Using the assumptions of the Theory of Planned Behavior (TPB), we took three constructs: attitude (ATT), subjective norms (SUBNs), and perceived behavioral control (PBC), and from the assumption of Human Capital (HC) theory, we constructed another variable, ITEE. Thus, the fundamental objective of this study is to find out the essential predictor of EI between entrepreneurial antecedents (ATT, SUBNs, PBC) and ITEE through an artificial neural network (ANN). Design/methodology/approach: Using the snowball sampling technique, a highly structured questionnaire was sent to respondents. Finally, a sample size of 397 business graduate students was chosen. Findings: The findings revealed that two dimensions of entrepreneurial antecedents (attitude and subjective norm) positively impacted EI. Furthermore, ITEE partially mediated the relationship between two dimensions of entrepreneurial antecedents (attitude and subjective norm) and EI. Moreover, through ANN, we found that attitude (ATT) was a crucial predictor of EI among business graduate students in Bangladesh. Research limitations/implications: In this study, only business graduate students were included as respondents; thus, further research should include students from other departments or disciplines to generalize the findings. Practical implications: This study covers numerous actors in terms of practical contributions, including students, academics, the government, and the state. This article should draw the attention of Bangladesh government policymakers regarding the significance of ITEE for developing entrepreneurship. The research framework of this study proposed that ITEE should implement antecedents of entrepreneurship into business education, boosting the ability of students to make judgments, which will also enhance EI in the future. Originality/value: Integrating the TPB theory with human capital theory represents a significant scholarly advancement in business education for graduate students in Southeast Asia, namely Bangladesh. Furthermore, we developed a novel ITEE scale by synthesizing information from many literary sources, providing valuable insights for future researchers. [ABSTRACT FROM AUTHOR]

Background: Sudden stroke had caused the caregivers minimal time to prepare for their role as carers. Some stroke caregivers were overwhelmed to adjust and accept new responsibilities. They need to reorganise their functions and establish new daily life routines in response to the chronic illness that happens with stroke survivors. Objective: This study aimed to determine and explore coping strategies employed by stroke caregivers. Methods: This mixed-method study involved 32 stroke caregivers from a community-based stroke rehabilitation centre in Kuching, Sarawak. Results: From quantitative analysis, most stroke caregivers employed problem-focused coping strategies (mean=56.66, SD=10.79), followed by emotion-focused coping strategies (mean=55.63, SD=10.29) in confronting the challenges of caring for stroke survivors. Data from qualitative findings revealed eight themes of coping strategies: adjustment to daily life, selfmotivation, sharing with other people, acceptance, avoiding thinking about the problem, hoping stroke survivors will get better, emotion suppression and self-blame. Conclusion: This study's outcomes provide crucial information about the burdens held by stroke caregivers when taking care of stroke survivors. Stroke caregivers need to adapt better and suitable coping strategies. This will prevent them from becoming overwhelmed by the accumulated stress from caring burdens. The long-term effect of coping strategies should positively assist stroke caregivers in managing the burdens effectively and fostering satisfaction in their life. [ABSTRACT FROM AUTHOR]

Biodiversity loss can have significant consequences for human well‐being, as it can affect multiple ecosystem properties and processes (MEPP) that drive ecosystem services. However, a comprehensive understanding of the link between environmental factors, biodiversity, and MEPP remains elusive, especially in mangrove ecosystems that millions of people along tropical coastlines worldwide depend upon. Here, we collated a comprehensive dataset on forest inventory, plant traits, and environmental factors across 93 plots in the Sundarbans Reserved Forests, Bangladesh. The functional composition (FC) of leaf area showed a stronger positive association with MEPP, being determined by total biomass and productivity of the mangroves, sediment organic carbon, and ammonium, phosphorus, and potassium contents of the sediment, than species richness (SR) or functional diversity (FD). Further, FC mediated a strong negative association of sediment salinity, and a positive association of SR, with MEPP. The similar but opposite total associations of SR and sediment salinity with MEPP suggest that species‐rich mangroves could offset the negative impacts of rising salinity on MEPP. When focusing on a single aspect of MEPP, both FD and FC mattered, with the FD of leaf area showing a strong association with mangrove productivity and sediment potassium content, while the FC of leaf litter nitrogen showed the strongest associations with sediment ammonium and phosphorus contents. Therefore, to sustain mangrove ecosystems as a reliable nature‐based solution for climate change mitigation, conservation and (re‐)establishment projects should prioritize regionally dominant species with high leaf area and nitrogen content, plus functionally different species to support the ecosystem processes and services provided by mangroves. [ABSTRACT FROM AUTHOR]

Several Asian countries that encourage international migration of labour call their emigrants 'national heroes and heroines' because of their contributions to foreign currency reserves and subsequent national development. However, the massive involuntary return amid the COVID-19 pandemic and the health risk associated with returning from virus-affected regions, such as the Gulf states, call the development narratives of migrants and migrant remittances into question. This study examines the experiences of Gulf return migrants in Bangladesh, focusing on their arrivals at the airport, their travels home, their receptions at the origin communities, their financial hardship upon return and the shifting development narratives in the origin country. The paper draws on primary data, collected through interviews of Gulf returnees in Bangladesh between 2020 and 2021. This study finds that the image of migrants as 'national heroes' is not only challenged during the pandemic but replaced almost overnight by a new one, such as 'COVID-19 super-spreaders'. This research reports that migrants confront with unpleasant circumstances during their return migration process that render their return to their country of origin disgraceful. The paper stresses developing policy measures to protect involuntary returnees from victimisation and disgraceful circumstances. [ABSTRACT FROM AUTHOR]

As dark meat has a faster deterioration rate and its unintentional mixing occurs during processing, it is crucial to know the status and freshness indicators of dark meat to ensure fishery product quality. In this method, fluorescence fingerprints (FFs) was applied as a rapid and noninvasive quality authentication method to determine differences between white and dark meat in the evaluation of freshness indicators at frozen state. Spotted mackerel (Scomber australasicus) fish chunks with different postmortem conditions (0–40 h ice stored) were obtained and frozen. A new generation of fluorescence spectrophotometer (F‐7100) was used to acquire FFs of the frozen fish chunks (containing white and dark meat). Adenosine triphosphate metabolites and pH were determined in both white and dark meat using their relevant biochemical methods. Higher K‐values in dark meat might be attributed to a higher accumulation rate of inosine (HxR) in dark meat than in white meat. The pH decrease rate in white meat was higher than that in dark meat during postmortem ice storage periods of fish. Principal component analysis of FFs spectra demonstrated clear discrimination (PC1 + PC2 = 91.7%) between white and dark meat of frozen fish due to the influence of freshness parameters based on the fluorescence features of fish meat. Furthermore, partial least squares regression validation models revealed that freshness indicators of white meat could be predicted more accurately at the frozen state than those of dark meat. This method could be applied during the processing of fishery products, thereby facilitating quality control activities and making it a promising authentication tool for the fisheries industries. [ABSTRACT FROM AUTHOR]

The paper examines the fragility, fragmentation, and crisis in the Middle East and North Africa (MENA) by dissecting the region into three subregions--Maghreb, Mashreq, and the GCC--and elaborating on their complex contours, diverse ideological orientations, and unavoidable outcomes. Politically, economically, demographically, and ethnically heterogeneous, and religiously reasonably homogenous, the MENA records high conflict rates. There is a lack of unity in diversity, hurting regional cooperation and cohesion. We argue that fragility and fragmentation lead to persistent inter- and intra-state conflict, high unemployment, water disputes, deepening poverty, recurrent famine, and growing numbers of refugees and displacement. By referring to examples from Maghreb, Mashreq, and the GCC, the paper shows the interplay between fragility and resilience and thus attempts to offer a nuanced understanding of the factors that trigger and sustain fragmentation and conflict in the region. The insights into the dynamics of fragility, fragmentation, and crisis highlight the imperatives of cooperation and cohesion in regional integration. [ABSTRACT FROM AUTHOR]

Women are recognized as proactive catalysts for societal change in rural Bangladesh because of their significant socio-economic contributions to agricultural practices. Historically, they have been closely associated with various agricultural activities ranging from seed preservation to crop harvesting. Despite their vital role in the rural economy, women farmers have encountered a number of obstacles resulting from the adaptation of neoliberal agrarian policies. In recent decades, women's participation in the agricultural sector has declined, which can be attributed to the influence of capitalist patriarchy on agricultural practices. Grounded on this argument, this present study aims to investigate a research question: What are the major challenges to women's participation in agricultural practices in Bangladesh? In order to answer this question, data has been collected through in-depth interviews and household surveys from three villages of Jaldhaka Upazila in the Nilphamari district of northwestern Bangladesh. The findings of this paper argue that women's participation in agriculture is challenged by the effects of the neoliberal policy perspective, such as the mechanization of agriculture, commercial land use, and land inequality, which continue to ratify patriarchy in agriculture. In such a situation, this study suggests women's empowerment could be effectively facilitated by adopting agricultural policies that are specifically tailored to address gender dynamics, emphasizing the active engagement and meaningful representation of women in the processes of policy formulation and execution. [ABSTRACT FROM AUTHOR]

South Asian labour migration to the GCC States is a debt-financed migration in which labour diasporas mobilise resources from a variety of sources, often at exorbitant interest rates, to cover migration costs. In the event of the COVID pandemic, job losses and involuntary returns compound the problem of debt-financed migration, affecting the transnational livelihood of migrant families. This paper explores how the debt-financed migration shapes the transnational livelihood of Gulf labour diasporas amid the pandemic. Empirically, this paper draws on the experiences of 60 Gulf migrants from the Indian state of Bihar. This study reports that the families diversify their labour resources by joining Gulf labour market and migration generates remittances that provide improved livelihood for their families. Although unforeseen events such as the pandemic may delay migration episodes and thus mount the debt burden on migrants, migrants nevertheless find ways to join the Gulf labour market and erk out a trananational livelihood. [ABSTRACT FROM AUTHOR]

This paper examines the healthcare provisions for migrants in Qatar. Migration and health are intricately entwined in the GCC states, with ramifications for both migrants and their host countries in the Gulf. The GCC states are home to nearly 30 million non-national residents or migrants, constituting the largest concentration of temporary migrants in the world. The provision of healthcare services to such a large migrant population presents a tremendous challenge for most Gulf states. It is worth pointing out that migration to the GCC states is inherently transient in nature, which further compounds the healthcare challenge. This paper explores how the GCC states respond to the rising demand for migrant healthcare by focusing on healthcare infrastructure and healthcare provisions for migrants in Qatar. The study reveals that Qatar has invested heavily in the expansion of healthcare infrastructure in tandem with its growing migrant population. Qatar offers healthcare services to the increasing migrant population through the Hamad health card, which allows its holders to access public healthcare services. This study suggests that there is a need for more expansion of public healthcare facilities to meet the expanding healthcare needs in coming years. [ABSTRACT FROM AUTHOR]

Cyclic liquefaction failure modes are directly related to the consequence of liquefaction and important for mitigation strategies. Two common failure modes, cyclic mobility (CM) and cyclic instability (CI), are well reported in the literature. However, recent experimental studies revealed three other failure modes, i.e. plastic strain accumulation (PSA) and two hybrid failures: CI followed by CM and CI followed by PSA. This study used discrete element method (DEM) which demonstrated all five different failure modes for cyclic loadings. The mechanics involved in these failure modes were evaluated in light of the Critical State Soil Mechanics (CSSM) framework using a series of drained and undrained triaxial simulations after isotropic and K0 consolidation. The state parameter (ψ) showed a good correlation with phase transformation (PT) and instability (IL) states. It was found that cyclic failure modes, particularly CM and CI, are closely linked with the PT and IL states, respectively. Some previous studies reported that the hybrid failure mode depends on the soil fabric influenced by the sample preparation method. However, all five different failure modes were observed for the assemblies prepared by the same technique. It was found that the failure modes depended on the location of the initial states of soil with respect to the critical state line in the classical e-log(p′) space, where e is the void ratio and p′ is mean effective stress. Also, distinct zones for failure modes were observed in the SSR/CSR-ψ space, which confirmed that the cyclic behaviour was strongly dependent on ψ; where CSR is cyclic stress ratio and SSR is static stress ratio. Such observation allows the prediction of cyclic failure modes within the CSSM framework. [ABSTRACT FROM AUTHOR]

This article examines the migration of international students to the Gulf Coop-eration Council (GCC) states from a comparative perspective. Over the past few decades, the GCC states have made significant investments in their education sec-tor, leading to notable improvements in educational infrastructure and quality, the establishment of new universities and knowledge parks, as well as the emergence of international university branches. Consequently, this transformation has attracted a growing number of international students to the Gulf region, including non-national resident students and foreign students arriving in the Gulf specifically for educational purposes. Student migration entails more than just entering a host country; it also involves university admissions policies, tuition fees, scholarship programs, immigration status and the pathways available for employment after graduation. Therefore, this article delves into the intricate aspects of student migration to the GCC states, shedding light on migration patterns, student compositions, admissions processes, financial considerations and integration into the Gulf labour market. The findings of this study indicate that the GCC states have made some headway in managing international student migration. However, there is still a need for the development of a comprehensive student migration policy that fully capitalises on the benefits of student migration to promote economic development in the Gulf states. [ABSTRACT FROM AUTHOR]

Microplastics are tiny plastic debris in the environment from industrial processes, various consumer items, and the breakdown of industrial waste. Recently, microplastics have been found for the first time in the airways, which increases the concern about long-term exposure and corresponding impacts on respiratory health. To date, a precise understanding of the microplastic transport to the airways is missing in the literature. Therefore, this first-ever study aims to analyze the microplastic transport and deposition within the upper lung airways. A computational fluid dynamics-discrete phase model approach is used to analyze the fluid flow and microplastic transport in airways. The sphericity concept and shape factor values are used to define the non-spherical microplastics. An accurate mesh test is performed for the computational mesh. The numerical results report that the highly asymmetric and complex morphology of the upper airway influences the flow fields and microplastic motion along with the flow rate and microplastic shape. The nasal cavity, mouth-throat, and trachea have high pressure, while a high flow velocity is observed at the area after passing the trachea. The flow rates, shape, and size of microplastics influence the overall deposition pattern. A higher flow rate leads to a lower deposition efficiency for all microplastic shapes. The nasal cavity has a high deposition rate compared to other regions. The microplastic deposition hot spot is calculated for shape and size-specific microplastic at various flow conditions. The findings of this study and more case-specific analysis will improve the knowledge of microplastic transport in airways and benefit future therapeutics development. The future study will be focused on the effect of various microplastic shapes on the human lung airways under the healthy and diseased airways conditions. [ABSTRACT FROM AUTHOR]

Tailings dams, which are storage structures for tailings, often are constructed using the tailings itself. A large number of tailings dam failures have been reported recently, especially due to static liquefaction, and can be attributed to a lack of knowledge of the geotechnical principles to be used and the lack of characterization of tailings as they continuously are produced and used as construction materials. Furthermore, the majority of past research work has been based on triaxial conditions even though it is believed that direct simple shear conditions may better represent the in situ condition of a tailings dam structure. This paper characterized the behavior of a tailings material from a copper tailings storage facility in Canada using the critical state soil mechanics framework using constant volume (undrained), drained, and constant shear drained shearing tests in direct simple shear space. The correlation between a modified state parameter (ψm) with instability state and the flow potential was investigated. Special attention was paid to the behavioral features of the material such as pore-water pressure generation, flow rule and dilatancy, phase transformation, characteristics state, and how they correlate with ψm. The differences in behavior from that of natural granular soils were highlighted. [ABSTRACT FROM AUTHOR]

Alien invasive species are posing conservation challenges worldwide. Pet trade, one of the many ways, is worsening the situation. Especially, pet turtles have been released into nature due to their longer life span and peoples' religious and traditional beliefs. In addition, unwanted and undesired pets are also released. While information on the successful local establishment and subsequent dispersal into new habitats is required to designate an invasive and ecosystem-disturbing species, alien freshwater turtle nests have always been hard to find and identify in nature. Because one should identify nests by the eggs, which do not always guide properly, as adults abandon the sites quickly. We thought the recent advancement in DNA technology may help improve the situation. We studied Pseudemys peninsularis, one of the most traded freshwater turtle pet species, which has already been reported from a wide range of wild areas in South Korea. Yet, it is not designated as ecosystem-disturbing species due to a lack of adequate information on their local reproduction and establishment. We conducted surveys and found two nests in Jeonpyeongje Neighborhood Park, Maewol-dong, Seo-gu, Gwangju. We developed the methodology for extracting DNA from the eggshells and successfully identified the nests by phylogenetic analysis and verified through egg characteristics and morphological features of artificially hatched juveniles. This was the first successful initiative to extract DNA from freshwater turtle eggshells. We believe it will help future researchers identify the alien invasive turtle nests and develop their control and management policies. In addition, our study also included comparative descriptions and schematic diagrams of the eggs of eight freshwater turtles, including a native and three ecosystem-disturbing species, from South Korea. We urged an immediate designation of P. peninsularis as an ecosystem-disturbing species considering its local establishment, distribution range, and potential negative impact on native ecosystems. [ABSTRACT FROM AUTHOR]

Introduction: Alcohol is classified as a psychoactive substance, and its dependence is one of the three leading risk factors for death, disability, or disease. Early age alcohol use by the age of 15 is implied to be harmful due to interference in the brain development of adolescents, causing alcohol-related problems later in life. This study aims to determine the prevalence and factors associated with alcohol use among Dayak adolescents in Sarawak, Malaysia. Methods: This was a cross-sectional quantitative research approach. A total of 12 districts within the 12 divisions were selected by multistage stratified cluster sampling. Dayak housing area lists were obtained from district offices and the local councils. The respondents were selected systematically according to male and female respondent houses, and they were interviewed using an interviewer-administered questionnaire. Data were entered into Microsoft Excel and analysed through IBM SPSS Version 27.0. Results: Dayak adolescents' mean age was 17.31 years. They were either low-risk (50.0 %), hazardous (31.0%), abstainers (11.0%), harmful (5.0%) or alcohol dependant (3.0%) drinkers. Age (p<.001), gender (p<.05), ethnicity (p<.001), religion (p<.05), employment (p<.001), level of education (p<.01), allowance (p<.001), family relationship (p<.05), and family size (p<.05) were the potential predictors of alcohol use disorder. Conclusion: Dayak adolescent alcohol drinking is prevalent and a public health problem, particularly among disadvantaged socio-economic families. The lower proportion of abstainers suggested that alcohol use among adolescents is on the rise. Hence, the results should be utilised to do targeted health promotion regarding harmful alcohol use among adolescents since early use of alcohol among adolescents may lead to more severe health and non-health outcomes in the future. [ABSTRACT FROM AUTHOR]

The pH of fish muscle is an important index for quality assessment, but the traditional methods using a pH meter and probe/electrode are destructive, time-consuming, and laborious, making them unsuitable for on-line meat-quality monitoring. Hence, an approach of using fluorescence fingerprints (FFs) for the non-destructive prediction of pH in frozen fish fillets was trialled. Sixty-three live horse mackerel (Trachurus japonicus) and spotted mackerel (Scomber australasicus) were freshly harvested, sacrificed instantly, then preserved in ice, filleted, vacuum-packed, and frozen. Subsequently, the FFs of all frozen fillets were recorded using a fibreoptic-equipped fluorescence spectrometer, and the corresponding pH values of the samples were measured. After pre-processing, the masked FFs were modelled using partial least squares regression (PLSR) for the prediction of pH values. The results revealed that the developed method was accurate enough for predicting the pH changes in frozen horse mackerel and spotted mackerel fillets with R2 = 0.71 and R2 = 0.90, respectively. The proposed technique could be utilized as a rapid and non-contact alternative to traditional pH electrodes for the quality monitoring of fish products. [ABSTRACT FROM AUTHOR]

During the time being, while everybody else is busy conversing about the adverse effects of COVID‐19, researchers solemnly look forward to intensifying the positive effects of COVID‐19 on political, economic, social, technological, environmental, and ethical (PESTEL) aspects, as it was unrevealed. The FGD (Focus Group Discussion) and Delphi methods were conducted from April 2020 to January 2021 through the online platform to collect the data. In this research, 40 graduates from 40 families were taken as our sample size who carried out the opinions of their family members. The average duration of the interview was 30–40 min. This article highlighted that COVID‐19 has some positive effects on social‐psychological aspects (PESTEL) and, people are trying to adapt to new practices (New Normal) to improve their lifestyles against the deadly virus. COVID‐19 would pass, but life will never be the same; thus, researchers conduct the research based on a country, which may not be similar to the other cultures and countries' perceptions. This is the first and foremost study on the positive effects of covid‐19 and a guideline to cope with any pandemic in the near future. The study's findings are intended to assist the community in developing positive social psychology to call the covid‐19 into question and look forward to a new standard. [ABSTRACT FROM AUTHOR]

This paper investigates the effects of the dynamic properties of a photovoltaic generator (PVG) on the stability of a grid-connected current-source inverter (CSI)-based photovoltaic system and presents a simple yet effective active compensator to ensure system stability. A detailed equivalent model of the PVG that considers the dynamic resistance, diffusion capacitance, series inductance, and dc cable resistance and inductance is used, and the effects of these parameters are assessed. It has been found that when the PVG operates in the constant-current region (CCR), the phase margin becomes negative in the control-to-input dynamics, which alters the stability of the dc-link current control. The change in the system dynamics when the operating point of the PVG shifts from the constant-voltage region (CVR) to CCR is verified through a detailed small-signal state-space model of the complete system. Furthermore, an active compensator is proposed to ensure stable dc-link current control operation at all operating points of the PVG. The influence of different control parameters on the integrated system dynamics is examined to determine the range of the control parameters required for stable operation. The performance of the proposed system under utility-grid fault, grid voltage parameter variation, weak grid, and changes in insolation level is also evaluated. Detailed nonlinear time-domain simulation results, using a typical utility-scale CSI-based PV system, validate the analytical results and the effectiveness of the proposed active stabilization under different operating conditions. [ABSTRACT FROM AUTHOR]

The SARS-CoV-2 Omicron variant is more highly transmissible and causes a higher mortality rate compared to the other eleven variants despite the high vaccination rate. The Omicron variant also establishes a local infection at the extrathoracic airway level. For better health risk assessment of the infected patients, it is essential to understand the transport behavior and the toxicity of the Omicron variant droplet deposition in the extrathoracic airways, which is missing in the literature. Therefore, this study aims to develop a numerical model for the Omicron droplet transport to the extrathoracic airways and to analyze that transport behavior. The finite volume method and ANSYS Fluent 2020 R2 solver were used for the numerical simulation. The Lagrangian approach, the discrete phase model, and the species transport model were employed to simulate the Omicron droplet transport and deposition. Different breathing rates, the mouth and nose inhalation methods were employed to analyze the viral toxicity at the airway wall. The results from this study indicated that there was a 33% of pressure drop for a flow rate at 30 l/min, while there was only a 3.5% of pressure drop for a 7.5 l/min. The nose inhalation of SARS-CoV-2 Omicron droplets is significantly more harmful than through the mouth due to a high deposition rate at the extrathoracic airways and high toxicity in the nasal cavities. The findings of this study would potentially improve knowledge of the health risk assessment of Omicron-infected patients. [ABSTRACT FROM AUTHOR]

Estimates of married women of reproductive age (MWRA) are needed for policy decisions to enhance reproductive health. Given the unavailability in Cameroon, this study aimed to derive MWRA counts by regions and divisions from 2000 to 2030. Data included 1976, 1987, and 2005 censuses with 606,542 women, five Demographic and Health Surveys from 1991 to 2018 with 48,981 women, and United Nations World Population Prospects from 1976 to 2030. Bayesian models were used in estimating fertility rates, net-migration, and finally, MWRA counts. The total MWRA population in Cameroon was estimated to increase from 2,260,665 (2,198,569–2,352,934) to 6,124,480 (5,862,854–6,482,921), reflecting a 5.7 (5.2–6.2) percentage points (%p) annual rise from 2000–2030. The Centre and Far North regions host the largest numbers, projected to reach 1,264,514 (1,099,373–1,470,021) and 1,069,814 (985,315–1,185,523), respectively, in 2030. The highest divisional-level increases are expected in Mfoundi [14.6%p (11.2–18.8)] and Bénoué [14.9%p (11.1–20.09). This study's findings, showing varied regional- and divisional-level estimates of and trends in MWRA counts should set a baseline for determining the demand for programmes such as family planning, and the scaling of relevant resources sub-nationally. [ABSTRACT FROM AUTHOR]

Introduction: Many factors hinder the effective responses to the HIV/AIDS epidemic. Stigma is one of the major barriers to effective responses to the HIV/AIDS epidemic. It is often considered the main reason for the low response to access proper services for prevention, treatment, and care for HIV/AIDS. In this context, we assessed the perceived level of stigmatisation towards people with HIV/AIDS among rural communities in Sarawak and determined its associated factors. Methods: This cross-sectional community-based study was conducted among the adult population aged 18 years and above among rural communities in Sarawak, Malaysia. A gender-stratified multistage cluster sampling technique was adopted to select the respondents. A total of 900 respondents were successfully interviewed using interviewer-guided questionnaires. Stepwise multiple linear regression with forward and backward selection method was used to determine the HIV/AIDS-related stigma. A p-value of ≤.05 was considered statistically significant. Results: Analysis revealed that females are more stigmatised than males (p<.05). Multivariate analysis showed that those who did not know someone had HIV and Chinese ethnicity were potential predictors in both male and female groups. Having no gainful job, and discussion of HIV/AIDS, household income less than MYR 500, history of HIV testing, knowledge on HIV transmission and exposure to HIV/AIDS information were factors that influenced HIV/AIDS-related stigma among female respondents. On the other hand, age group 30 to 39, Bidayuh, Chinese ethnicity, and not knowing someone had HIV and media exposure on HIV were factors that influenced HIV/AIDS-related stigma among male respondents. Conclusion: HIV/AIDS-related stigma towards HIV/AIDS existed in rural communities. Enhanced health promotion related to HIV/AIDS activities in rural communities are needed to curb stigmatisation toward people with HIV/AIDS. [ABSTRACT FROM AUTHOR]

Invasive species are of global conservation concern. South Korea is also facing the same challenge, especially, due to the growing pet trade. Herein, we report Pelomedusa cf. olivacea (Schweigger, 1812) from the wild in South Korea, where it has been imported as a pet. This is the first record of Pelomedusa in the Asian continent. In October 2019, we found an individual of this species beside Hongje Stream in Seoul. We recommend immediate control measures and strict monitoring of the pet trade to avoid the introduction of more invasive species. [ABSTRACT FROM AUTHOR]

Depletion of fossil fuel and massive emissions of hazardous greenhouse gases are prompting many researchers to focus on greener renewable fuel such as biodiesel, which has the potential to replace petrodiesel partially. This review covers various aspects related to biodiesel feedstock and its effects on biodiesel characteristics, biodiesel production methods, blending techniques, biodiesel properties, combustion, engine performance, and emission analysis, the effects of different additives on biodiesel characteristics, and some challenges associated with biodiesel. Moreover, different relevant empirical correlations of biodiesel properties and combustion parameters are presented. Despite alkali catalysis being the most adopted transesterification process, lipase catalysis and heterogeneous catalysis are potential processes for future biodiesel production from low‐cost feedstock. Biodiesel has higher viscosity, density, flash point, cetane number, and pour point while having low heating value in comparison with petrodiesel. Most studies conducted on diesel engine led to a reduction in brake power, brake thermal efficiency, carbon monoxide, sulfur dioxide, particulate matter, and unburned hydrocarbons, and increased brake specific fuel consumption and oxides of nitrogen are associated with biodiesel compared to petrodiesel. In brief, biodiesel is comparable to petrodiesel. However, before there is a large‐scale application of biodiesel in the automotive sector it has to overcome some challenges such as its compatibility with engine components, its instability, its effect on engine wear, deposit formation, and clogging of fuel filters and injectors. Increased focus should also be given to second‐generation biodiesel over first‐generation biodiesel because second‐generation biodiesel can offset production costs, reduce deforestation, and solve the food versus fuel problem. © 2022 Society of Chemical Industry and John Wiley & Sons, Ltd. [ABSTRACT FROM AUTHOR]

The invasive species are of global concern, and the Invasive American Bullfrog (IAB; Lithobates catesbeianus) is one of the worst invasive amphibian species worldwide. Like other countries, South Korea is also facing challenges from IAB. Although many studies indicated impacts of IAB on native anurans in Korea, the actual risk at the specific level is yet to evaluate. Considering the putative invasiveness of IAB, it is hypothesized that any species with the possibility of physical contact or habitat sharing with them, will have a potential risk. Thus, we estimated and observed their home range, preferred habitats, morphology, behavior, and ecology. Then, comparing with existing knowledge, we assessed risks to the native anurans. We found a home range of 3474.2 ± 5872.5 m2 and identified three types of habitats for IAB. The analyses showed at least 84% of native anurans (frogs and toads) were at moderate to extreme risks, which included all frogs but only 33% of toads. Finally, we recommended immediate actions to conserve the native anurans based on our results. As this study is the first initiative to assess the specific risk level from the invasiveness of L. catesbeianus, it will help the managers to set conservation priorities and strategies. [ABSTRACT FROM AUTHOR]

This study aimed to identify the impact of home quarantine challenges on the psychological status of mass people during Coronavirus Disease (COVID‐19) in the capital city (Dhaka) of Bangladesh. A highly organized questionnaire was created in "Google Form" and given to respondents at random via multiple social media sites, including WhatsApp, LinkedIn, and Messenger. However, a sample size of 208 people was taken and analysis was carried out using Statistical Package for the Social Sciences and Analysis of a Moment Structures software. Analysis showed that home quarantine challenges are positively related to the psychological status and home quarantine challenges have a significant impact on psychological status during COVID‐19. In Bangladesh, the major challenges to home quarantine are lack of consciousness, lack of medical support, and the possibility of losing their current jobs. This study provides insight into the challenges of home quarantine and the psychological status of Bangladeshi people. The findings may be helpful for policymakers in identifying necessary measures to overcome these challenges. Only Dhaka division was taken out of seven divisions in Bangladesh to conduct this study, which might be difficult to generalize the findings of this study. Thus, in the future, it is suggested that more respondents from other divisions need to be covered. [ABSTRACT FROM AUTHOR]

The study attempted to identify the challenges and threats to coastal and marine conservation and assessed the effectiveness of the existing legal, policy, and institutional frameworks in this regard. This multidisciplinary research used both primary and secondary data. It was revealed that in the protected areas, both conservations and degradations go hand in hand, indicating the ineffectiveness of regulatory schemes. Ironically, many destructive activities like wetland poisoning, onslaught wildlife poaching, and clear felling of mangrove tree species threaten conservation initiatives in the coastal habitats. There is no specific law and policy which can effectively regulate marine and coastal resource management and conservation. Instead, many fragmented laws and policies created jurisdictional overlapping, followed by interest conflicts in most cases. The study recommends legal and institutional reforms to abolish jurisdictional overlapping and establish effective marine governance. The study proposed a model of an evidence-based national marine policy based on stakeholders' perceptions. [ABSTRACT FROM AUTHOR]

In recent years, there has been a notable emphasis on waste reduction and the adoption of recycled materials within the construction industry to reduce the industry's overall carbon footprint. This study investigates the structural performances of concrete kerb sections prepared with five different concrete mixes containing recycled concrete aggregate, recycled tyre-derived aggregates and recycled polypropylene fibres. Kerb sections were cast at a road site in a suburb of Adelaide, Australia. After the concrete hardened, sections were cut and brought to the laboratory. A large number of monotonic and cyclic load tests were conducted on the kerb sections. The load-carrying capacity, bending moment capacity, cyclic fatigue capacity, durability properties along with deformation tolerance were evaluated. Kerb sections made with concrete containing recycled aggregate and polypropylene fibre could sustain nearly 2000 cycles of loading. Kerb sections prepared with natural aggregate concrete performed comparatively better. The addition of polypropylene fibre significantly improved the post-cracking behaviour of kerb sections and can delay crack propagation and other distress when subjected to cyclic loadings such as excessive soil movement, e.g., in areas with expansive soils or prone to tree root migration. Long-term observation may be required to confirm the mechanical and durability performance improvement in real field conditions. • Large concrete kerb sections tested under monotonic and cyclic loading. • Concrete mixes contained natural, recycled, tyre-derived aggregate and PP fibres. • Fatigue tests indicated excellent post-peak load capacity in cyclic loading. • Kerbs with RCA and recycled fibre sustained ∼2000 cycles of loading. • Fibre delayed crack propagation and improved post-cracking behaviour. [ABSTRACT FROM AUTHOR]

Simple Summary: Age determination is very important for observing life history traits, evaluating vulnerable life stages, and setting proper management and conservation strategies. Age determination in animals has always been tricky. Among other approaches, skeletochronology, an age determination method that involves counting the lines of arrested growth (LAGs) produced during inactive periods, similar to plant year rings, is well-practiced in many animal groups. However, the applicability of this method remains questioned for many species, including amphibians, because of concerns around the scarcity of information on confirmed numbers of annual LAGs (e.g., once or twice in a year), chances of the disappearance of LAGs over time, and which lines exactly to count. Herein, we tested its applicability to Kaloula borealis, a class II endangered amphibian in South Korea, by rearing juveniles in the laboratory for more than one year and comparing the results with the wild population at Lake Sihwa. This study confirmed the formation of one LAG each year and no disappearance of LAGs over time in this species. Furthermore, we were also able to determine the age structure of this wild population accurately. Hence, our study validates using skeletochronology in this species and recommends it for others that show similar growth patterns. Despite having some limitations, the use of skeletochronology—age determination by counting lines of arrested growth (LAGs)—in amphibians is increasing. The main limitation of using skeletochronology is identifying the innermost visible line (IVL) and counting the exact number of LAGs. Thus, we tested its applicability to Kaloula borealis, a class II endangered amphibian in South Korea. We reared juveniles in the lab to investigate the process of bone formation. This confirmed the development of one LAG each year. Hence, our study validates skeletochronology for the age determination of this species and recommends it for others that show similar growth patterns. Furthermore, the comparison of threshold diameters with the IVL of wild individuals confirmed no LAG1 resorption. The average age of males and females in this population was 2.75 ± 1.05 and 3.64 ± 3 years, respectively. We estimated sexual maturity at 2 years with rapid growth up to that stage in both sexes. We found a female-dominated sexual size dimorphism. This study offers accurate information on the life history traits and age structure of K. borealis that may help to evaluate population dynamics in other areas, identify vulnerable life stages and sites, assess the causes of population decline, and set conservation priorities. [ABSTRACT FROM AUTHOR]

Collecting data using an appropriate sampling technique is a challenging task for a researcher to do. The researchers will be unable to collect data from all possible situations, which will preclude them from answering the study's research questions in their current form. In light of the enormous number and variety of sampling techniques/methods available, the researcher must be knowledgeable about the differences to select the most appropriate sampling technique/method for the specific study under consideration. In this context, this study also looks into the basic concepts in probability sampling, kinds of probability sampling techniques with their advantages and disadvantages. Social science researchers will benefit from this study since it will assist them in choosing the most suitable probability sampling technique(s) for completing their research smoothly and successfully. [ABSTRACT FROM AUTHOR]

Fabric anisotropy and fines content (fc) in sands modify significantly their mechanical behaviour, particularly as related to static liquefaction under undrained conditions. The fabric anisotropy aspect, expressed by means of an evolving fabric tensor F, has been addressed in the recently developed Anisotropic Critical State Theory (ACST) that enhances the two critical state conditions on stress ratio (η) and void ratio (e) of the classical Critical State Theory by an additional condition on the critical state value of F in relation to loading direction; based on this concept it introduces the dependence of dilatancy on fabric anisotropy. Various models have been successfully developed within this framework for clean sands. The fc aspect has been addressed within the Equivalent Granular State Theory (EGST) that substitutes a properly defined equivalent granular void ratio (e*) for e in any model for clean sand in order to obtain the response of sand with fines without any other change of the model structure and constants. Along these lines, a constitutive model is constructed in this work in order to address the effect of both F and fc simultaneously, by a combination of these two powerful propositions. The idea is very simple: one takes a constitutive model developed within ACST for clean sands, hence it accounts for fabric anisotropy, and substitutes the e* for e, as well as the derivative quantities of such substitution, hence it accounts for fc. The result yields a model that can simulate data on the undrained response for a range of fc, with emphasis on static liquefaction. It is shown that the inclusion of fabric anisotropy improves previous similar simulations made within the EGST but without the framework of ACST. [ABSTRACT FROM AUTHOR]

New methods are required for biomonitoring of poorly known tropical ecosystems, but biological assessments of environmental status are limited by insufficient information on taxonomy, composition and ecology of local communities. The current work applies DNA‐based assessment to establish the impact of various types of anthropogenic disturbances on the freshwater macroinvertebrates in an understudied biodiversity hotspot in South Asia, an area that attracts increasing attention for the loss of aquatic ecosystems.We sampled 16 river systems in the Chittagong Hill Tracts region of Bangladesh and characterised habitat intactness based on a set of 14 environmental parameters associated with habitat quality and human activities. Whole‐community metabarcoding was used to investigate the distribution of hypothetical species‐level clusters (Operational Taxonomic Units, OTUs) across sites of different impacts.We found >900 DNA clusters of insects, decapods and molluscs, dominated by Diptera, which revealed significant variation (p < 0.001) in richness across sites. The presumed sensitive Ephemeroptera‐Plecoptera–Trichoptera (EPT) represented 15.6% of total OTU richness. The type and strength of anthropogenic stressors varied greatly across streams but did not affect total OTU diversity. In contrast, EPT richness decreased by ~50% in response to habitat degradation. Partial‐network analysis revealed 26 OTUs that may serve as potential indicators for either good or poor ecological status. Overall, our results document high diversity, local endemicity and pronounced responses to disturbance in these largely unexplored but threatened habitats.Synthesis and applications. The proposed methodology combines local habitat surveys across sites of various degrees of disturbance with species‐level metabarcoding, as a model for biological evaluation of water bodies in poorly known and inaccessible places across the world. Implemented here for the Indo‐Burmese hotspot, the approach will have great value for applied conservation management as a step towards building a biomonitoring system in this region where currently little is known about the taxonomy, diversity and endemicity in both intact and disturbed ecosystems. [ABSTRACT FROM AUTHOR]

In recent times, lithium‐ion batteries (LIBs) are widely used in the fields of small electronic devices, wearable electronic devices, and automobiles. In the light of some current research on LIBs investigated on replacing commercial carbonaceous anode materials with transition metal oxides such as NiO due to its high theoretical capacity of 718 mAh g−1. However, NiO still suffers from low cycling stability, low coulombic efficiency, and low rate capability resulting from large volume expansion and poor electrical conductivity which greatly limits the development of large‐capacity LIBs. To overcome these barriers, various NiO electrodes with different morphologies and physical structures are developed. In this review, we introduce and summarize the electrochemical performances of binder‐free NiO‐Ni foam as anode of LIBs. [ABSTRACT FROM AUTHOR]

Background: Limitations to accessing delivery care services increase the risks of adverse outcomes during pregnancy and delivery for all pregnant women, particularly among adolescents in LMICs. In order to inform adolescent-specific delivery care initiatives and coverage, we conducted a comprehensive analysis of trends, projections and inequalities in coverage of delivery care services among adolescents at national, urban-rural and socio-economic levels in LMICs.Methods: Using 224 nationally representative cross-sectional survey data between 2000 and 2019, we estimated the coverage of institutional delivery (INSD) and skilled birth attendants (SBA). Bayesian hierarchical regression models were used to estimate trends, projections and determinants of INSD and SBA.Results: Coverage of delivery care services among adolescents increased substantially at the national level, as well as in both urban and rural areas in most countries between 2000 and 2018. Of the 54 LMICs, 24 countries reached 80% coverage of both INSD and SBA in 2018, and predictions for 40 countries are set to exceed 80% by 2030. The trends in coverage of INSD and SBA of adult mothers mostly align with those for adolescent mothers. Our findings show that urban-rural and wealth-based inequalities to delivery care remain persistent by 2030. In 2018, urban settings across 54 countries had higher rates of coverage exceeding 80% compared to rural for both INSD (45 urban, 16 rural) and SBA (50 urban, 19 rural). Several factors such as household head age ≥ 46 years, household head being female, access to mass media, lower parity, higher education, higher ANC visits and higher socio-economic status could increase the coverage of INSD and SBA among adolescents and adult women.Conclusions: More than three-quarters of the LMICs are predicted to achieve 80% coverage of INSD and SBA among adolescent mothers in 2030, although with sustained inequalities. [ABSTRACT FROM AUTHOR]

The overall objective of the study was to examine the pros and cons of the participatory approach adopted in natural resource management in the ecologically protected areas of the Sundarbans mangrove of Bangladesh. A comparative study was done between the people who are involved and non-involved in this approach. Empirical data was collected through personal interviews with a structured questionnaire. The Gini coefficient was measured first and then embedded with the Lorenz curve to draw a line between perfect equality and inequality vis-a-vis. The study revealed that the co-management built awareness in favor of biodiversity conservation and the efficient use of natural resources. Contradictorily, a segment of different hierarchical committees was involved in destructive activities like poisoning the wetlands for fishing. Therefore, a mixed outcome was found. The findings will help the policymakers in identifying the pitfalls and bottlenecks rooted in co-management. Hence, the study recommends revising the approach to ensure the community’s active participation on an equal basis and take action against them who degrade those resources. Exploring profitable alternative income-generating activities is warranted to narrow down the dependency on the Sundarbans mangrove’s natural resources. In order to address the tragedy of the commons, the study advocates for the unity of all knowledge ranging from science to humanistic scholarship for sound policymaking. [ABSTRACT FROM AUTHOR]

Due to the advancements of power electronic devices and photovoltaic (PV) power systems, there has been an increasing interest in transformerless grid-connected PV inverters, which offer lower cost, smaller volume, and higher efficiency than the one with the transformer. However, transformerless inverters with conventional topologies suffer from leakage current problem, which needs to be handled carefully. To overcome the conduction loss and leakage current problem associated with conventional transformerless inverters, a new transformerless H6 (six-switch-based) inverter topology is proposed in this article that can maintain constant common-mode (CM) voltage. At the same time, reduce or eliminate the leakage current problem. The proposed inverter topology is simulated using MATLAB/Simulink software to validate the proposed system's accuracy. The proposed topology's effectiveness is verified through the comparative results of CM voltage, CM leakage current, and conduction loss of the proposed topology with the conventional H6-I, H6-II, and H5 topologies. Finally, to validate the proposed topology, a laboratory prototype is also built and tested. The experimental results validate the theoretical analysis and simulation results. [ABSTRACT FROM AUTHOR]

Introduction: Maternal and child health, which is integral to public health, depends on maintaining a healthy diet during pregnancy and lactation to achieve optimal outcomes. This study aimed to investigate the prevalence and determinants of minimum dietary diversity (MDD) among pregnant and lactating women (PLW) in this particular context. Methods: A stratified cluster sampling approach was employed, encompassing intervention areas (Rangpur and Nilphamari in Bangladesh) as strata, with 30 clusters. The study included 631 pregnant and lactating women (PLW) aged 15 to 49 years, focusing on their consumption of a minimally diverse diet. The outcome variable was binary: MDD (1 = if they consumed ≥ 5 food items from a basket of 10 food groups, indicating they met the MDD; 0 = if they consumed < 5 items, indicating they did not meet the MDD), assessed based on ten food groups over a 24-hour period. The data were analyzed using a binary logistic regression model. Results: The study found that 51.19% of PLW met MDD criteria, indicating positive dietary practices. Those aged 21–49 years had significantly lower odds of meeting MDD than those aged 15–20 years. Education played a key role, with completion of primary (p = 0.029) and secondary incomplete education (p = 0.055) associated with higher odds of meeting MDD. Other identified predictors included climate-smart techniques for agriculture, women's empowerment, food security, producing legume, nut and seeds and negative impact on family expenditure due to increase in commodity prices, especially food prices. Employing climate-smart agriculture increased odds by 1.58 times (p = 0.028), empowered women had 2.31 times higher odds (p < 0.001), and food security played a crucial role (p = 0.006). Moreover, producing legumes, nuts, or seeds was significantly associated with higher odds of meeting MDD (OR = 1.55, p = 0.039), while experiencing negative economic impacts lowered the odds (OR = 0.63, p = 0.034). Conclusion: The study provides insights into factors influencing MDD among PLW in northern Bangladesh. Empowering women and promoting climate-smart techniques for agriculture emerged as pivotal determinants, alongside enhancing education levels, increasing food security, and addressing economic barriers. Implementing multifaceted interventions that consider socio-demographic diversity, economic disparities, and dietary preferences is crucial for enhancing dietary diversity and improving health outcomes in this vulnerable population. [ABSTRACT FROM AUTHOR]

Background: A significant number of chikungunya virus infected people develop neuropathic pain lasting for months to years. Patients with neuropathic pain are difficult to treat with conventional analgesics and frequently require antidepressant and anticonvulsant medications. The current study compared the efficacy of amitriptyline and duloxetine in the treatment of post-chikungunya neuropathic pain. Methodology: In this randomized, cross-over, clinical trial, a total of forty patients were enrolled and randomly assigned to either amitriptyline or duloxetine for four weeks followed by a two-week washout period. Then the patients were crossed-over to the next phase which lasted for another four weeks. Amitriptyline was given in doses of 10, 25, and 50 mg and duloxetine was given in 20, 30, and 60 mg once daily at 8.00 PM respectively with optional dose up-titration. Pain relief was measured by VAS (visual analogue scale) after one, two, three, and four weeks in each phase as a primary outcome, and improvement of quality of life was assessed by SF-36 (short form-36) at the beginning and end of each phase as a secondary outcome. Results: A total of twenty one patients completed both treatment phases out of forty patients. The reduction of pain intensity was significant in both amitriptyline and duloxetine groups compared with their baseline values (p < 0.001), with no significant difference between the groups (p > 0.336). The quality of life (SF-36) was significantly improved with both amitriptyline and duloxetine (p < 0.001) but the difference between the two treatments was not significant (p > 0.324). Regarding adverse events, dry mouth was significantly more common in the amitriptyline group than the duloxetine group (p < 0.013). Conclusion: Amitriptyline and duloxetine can be used in the treatment of post-chikungunya neuropathic pain effectively, but duloxetine is preferred because of its less adverse effects. Trial registration: The trial was approved by Institutional Review Board, Bangabandhu Sheikh Mujib Medical University dated January 19, 2020; Trial number: BSMMU/2020/712. [ABSTRACT FROM AUTHOR]

Background: Equity is one of three dimensions of universal health coverage (UHC). However, Iraq has had capital-focused health services and successive conflicts and political turmoil have hampered health services around the country. Iraq has embarked on a new reconstruction process since 2018 and it could be time to aim for equitable healthcare access to realise UHC. We aimed to examine inequality and determinants associated with Iraq's progress towards UHC targets. Methods: We assessed the progress toward UHC in the context of equity using six nationally representative population-based household surveys in Iraq in 2000–2018. We included 14 health service indicators and two financial risk protection indicators in our UHC progress assessment. Bayesian hierarchical regression model was used to estimate the trend, projection, and determinant analyses. Slope and relative index of inequality were used to assess wealth-based inequality. Results: In the national-level health service indicators, inequality indices decreased substantially from 2000 to 2030. However, the wide inequalities are projected to remain in DTP3, measles, full immunisations, and antenatal care in 2030. The pro-rich inequality gap in catastrophic health expenditure increased significantly in all governorates except Sulaimaniya from 2007 to 2012. The higher increases in pro-rich inequality were found in Missan, Karbala, Erbil, and Diala. Mothers' higher education and more antenatal care visits were possible factors for increased coverage of health service indicators. The higher number of children and elderly population in the households were potential risk factors for an increased risk of catastrophic and impoverishing health payment in Iraq. Conclusions: To reduce inequality in Iraq, urgent health-system reform is needed, with consideration for vulnerable households having female-heads, less educated mothers, and more children and/or elderly people. Considering varying inequity between and within governorates in Iraq, reconstruction of primary healthcare across the country and cross-sectoral targeted interventions for women should be prioritised. [ABSTRACT FROM AUTHOR]