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The objective of this study was to investigate the mental disturbances among COVID-19 survivors while also examining their quality of life. A retrospective cohort study was conducted among COVID-19 survivors in northern Vietnam. Anxiety, depression, insomnia, cognitive impairment, and quality of life were assessed using the Patient Health Questionnaire-9, Generalized Anxiety Disorder-7, Pittsburgh Sleep Quality Index, Mini-Cog, and Short Form-8 (SF-8), respectively. Information regarding COVID and post-COVID conditions was retrospectively collected through direct interviews. Ordinal logistic regression was employed to identify factors associated with the severity of depression and anxiety; binary logistic regression was used to identify factors associated with the presence of sleep disturbance and cognitive impairment, and linear regression was utilized to identify factors associated with the mental and physical components of the SF-8. A total of 1596 participants were included in this study, with the prevalence of depression, anxiety, sleep disturbance, and cognitive impairment being 8.7%, 16.9%, 23.4%, and 5.6%, respectively. Experiencing discrimination during COVID-19 infection and post-COVID syndrome were both linked to long-term outcomes of depression, anxiety, and insomnia and were also related to a decline in the quality of life. Our study provided initial insights into the mental outcomes and quality of life among COVID-19 survivors over an extended period, with stigmatization and post-COVID syndrome identified as the primary associated factors. A longitudinal study with random sampling, a control group, and measures to better control recall bias is recommended.

This study examines the relationships between Green Human Resources Management and employees’ intention to engage in environmentally responsible behaviors. Conducted within the context of 380 employees in Vietnam, a developing country, the research collected data from these workers, which were processed using SmartPLS. The research results indicated that Green Human Resources Management has a positive impact on employees’ green behavioral intention and also highlighted the moderating impact of individual green values and the mediating role of Corporate Social Responsibility. These results offer invaluable guidance for organizations seeking to cultivate environmental sustainability through effective HRM practices. Simultaneously, they emphasize the importance of promoting social responsibility and enhancing business performance within the unique Vietnamese business landscape. This research underscores the pivotal role HRM plays in steering organizations towards a greener and more socially responsible future, particularly in emerging economies like Vietnam.

AbstractThis study examines the joint effects of climate policy uncertainty (CPU) and economic policy uncertainty (EPU) on the green activities (GAs) of Vietnamese listed companies from 2010 to 2022. CPU and EPU are measured by standardizing the search volume index of relevant keywords using data from Google Trends and Glimpse. Meanwhile, GAs are assessed through variables related to green finance (GF) and green innovation (GI). The findings from multivariate regression models show a positive relationship between CPU, EPU, and either GF or GI in Vietnam during the period of 2010–2022. Furthermore, the interaction between CPU and EPU positively influences both GF and GI among listed firms throughout the research period. This study suggests that governments promoting policies to enhance economic activity or address climate change can facilitate firms in sustaining their green economic activities.

Toxoplasmosis caused by Toxoplasma gondii is an important zoonosis that shows severe symptoms in immunocompromised patients. High seroprevalences of toxoplasmosis were found in cats, humans, and pigs in traditional farms in Thua Thien Hue province. The main sources of infections remain unknown, thus making toxoplasmosis neglected and uncontrollable in this region. This study aimed to determine T. gondii contamination in vegetables used for human and livestock consumption and its spatial distribution in Thua Thien Hue rural areas. A cross-sectional study was conducted to investigate T. gondii contamination in vegetables grown in households in three different geographic regions. The pathogen DNA was detected from vegetable samples using a primer pair that is highly specific for the 529-bp repetitive element found in T. gondii genome. In this study, 55 out of 221 (24.9%) vegetable samples were positive for T. gondii using PCR. Factors, including location, presence of fence in the garden, owning cats, and treatment of feed for cats, were not significantly associated with T. gondii contamination in vegetables according to the logistic regression. However, vegetables collected in households that have no fence for vegetable gardens, own cats, and feed cats raw or undercooked foods tend to be more heavily contaminated than others. Furthermore, a wide distribution of infected vegetables was observed in all investigated districts, showing a high infection pressure in these residential areas. This is the first report of vegetables contaminated with T. gondii in Vietnam, which reveals an overlooked health risk for humans and animals.

Abstract This study investigates the relationship between corporate governance, external financing, and earnings management in an emerging market. Using a sample of Vietnamese listed companies in the period of 2010–2020, the results indicate that corporate governance, which is measured by a principal component analysis (PCA) methodology, is a useful mechanism to control earnings management. However, when firms engage in external financing activities, corporate governance is not significantly associated with both accrual-based and real earnings management. In addition, the study also examines the role of corporate governance in moderating the effects of earnings management on firm value, and how it is encouraged by external financing needs. The study shows that while good corporate governance lessens the influence of earnings management on firm value, external financing needs only prompts earnings manipulation and have no effect on firm value, directly or indirectly. Therefore, the findings could provide implications for managers and regulators to enhance governance practice to alleviate firm devaluation caused by earnings management practice.

Abstract Background While early detection and early containment are key to controlling the African swine fever (ASF) pandemic, the lack of practical testing methods for use in the field are a major barrier to achieving this feat. Objectives To describe the development of a rapid and sensitive point‐of‐care test (POCT) for ASF, and its evaluation using swine whole blood samples for field settings. Methods In total, 89 swine whole blood samples were collected from Vietnamese swine farms and were performed the POCT using a combination of crude DNA extraction and LAMP (loop‐mediated isothermal amplification) amplification. Results The POCT enabled crude DNA to be extracted from swine whole blood samples within 10 min at extremely low cost and with relative ease. The entire POCT required a maximum of 50 min from the beginning of DNA extraction to final judgment. Compared to a conventional real‐time PCR detection, the POCT showed a 1 log reduction in detection sensitivity, but comparable diagnostic sensitivity of 100% (56/56) and diagnostic specificity of 100% (33/33). The POCT was quicker and easier to perform and did not require special equipment. Conclusions This POCT is expected to facilitate early diagnosis and containment of ASF invasion into both regions in which it is endemic and eradicated.

ABSTRACT: Objective: This study described the rate of suicidal ideation in lung cancer patients and identify associated factors. Method: A cross-sectional study was conducted from August 2021 to October 2022 at the Nuclear Medicine and Oncology Center – Bach Mai Hospital, Hanoi, Vietnam. A total of 256 patients completed the survey. The Columbia Suicide Severity Rating Scale (C-SSRS) was used to measure suicidal ideation. The Hospital Anxiety and Depression Scale (HADS) was utilized to evaluate depression and anxiety. Socio-demographic characteristics, clinical features and pain severity were also measured. Multivariate logistic regression was used to identify factors associated with suicidal ideation. Results: There was 8.2% having suicidal ideation. Among patients with suicidal ideation, the mean score of intensity subscale was 13.33 ± 4.98, and mean scores on intensity scale items were as follows: frequency (mean=2.86 ± 1.32). duration (mean=2.29 ± 1.15), controllability (mean=2.67 ± 1.28), deterrents (mean=2.48 ± 1.21), and reason for ideation (mean=3,05 ± 1,63). Being female (OR=3.36, 95%CI=1.35-8.37), having severxe pain (OR=5.91, 95%CI=1.65-21.18), having depression (OR=10.36, 95%CI=3.93-27.39) and having anxiety (OR=7.81, 95%CI=3.05-20.01) were positively associated with the likelihood of having suicidal ideation among lung cancer patients. Conclusion: Findings revealed the high prevalence of suicidal ideation among individuals diagnosed with lung cancer in Vietnam. Notably, this trend was more pronounced among female patients, those with severe pain, and individuals experiencing mental disorders such as depression and anxiety. Practitioners ought to prioritize the screening and intervention processes for lung cancer patients with a high risk of suicidal tendencies.

AbstractThis study examines the relationship between institutional investors, corporate governance, and firm performance in Vietnam. The findings on Vietnamese listed companies indicate that while institutional investors are less likely to hold shares of companies with larger board sizes, Chief Executive Officer (CEO) duality, and ultimate control by the state (except for state-owned institutions’ perspective), the effect of their ownership on firm performance depends on whether they are pressure-sensitive (grey) or pressure-insensitive (independent) institutions. In Vietnam, independent institutional investors monitor the company and their investment more effectively than grey institutional investors. They can significantly influence management decisions and improve shareholder value. In contrast, grey institutional ownership is either negatively or insignificantly related to firm performance due to conflicts of interest, as they have a potentially related business relationship with the invested companies.

This paper examines the impact of COVID-19 nationwide lockdown on the relationship between weather anomaly and the Vietnam stock market – a fast-growing emerging market. The paper employs event study methodology to compute the cumulative abnormal return of stocks during the pandemic, and the Holt-Winters Exponential Smoothing model to build the formula for weather anomaly for weather variables. In addition, a t-test is performed to examine the statistical significance of weather variables, as well as the impact that the lockdown order had on stock performance. Cross-sectional analysis by Ordinary Least Squares regression is also applied for estimating the relationship between weather and stock market performance. The finding shows that prior to the COVID-19 lockdown, all of the risk and return indicators, with the exception of idiosyncratic risk, are affected by temperature. After the lockdown order was withdrawn, temperature is only correlated with cumulative real returns and cumulative abnormal returns. Meanwhile, air pressure only appears to have an influence on cumulative abnormal returns after the lockdown, yet being the only meteorological factor that could impact the stock market during the lockdown. Generally, the larger the weather anomaly, the worse the returns and the higher the risks. The paper gives recommendations for listed companies and authorities to have better performance while engaging in and regulating the stock markets. Moreover, the results can be used as a reference for the investing community to incorporate meteorological factors into their analysis.

We built a model and proposed a theory about the thermodynamic properties of face-centered cubic (FCC) binary interstitial alloy’s thin films based on the statistical moment method and performed numerical calculations for AuSi (gold silicide). First, the statistical moment method (SMM) calculations for the thermodynamic properties of Au are compared with reported experiments and calculations that show a good agreement between the calculations in this paper and earlier studies. Additionally, the SMM calculations for thermodynamic properties of AuSi alloy films are performed, which show that the thermal expansion coefficient, the specific heat at constant volume, and the specific heat at constant pressure increases, while the isothermal elastic modulus decreases with increasing temperature and increasing interstitial atom concentration. Furthermore, when the number of layers reaches 100, the thermodynamic properties of the film are similar to those of the bulk material. The achieved theoretical results for AuSi films are novel and can be useful in designing future experiments.

This study examines the fly ash from Soc Son municipal waste power plant (SMPP) and suggests ways to repurpose it to reduce its environmental impact. Fly ash from the Soc Son waste power plant has a gray color, spherical particles with a 5–103 μ m diameter, and a high carbon and heavy metal content. Bermorite crystals can absorb and release heavy metals, making monitoring secondary pollutants during incineration crucial. The EDX analysis of fly ash from the Soc Son waste power plant revealed that it was predominantly contaminated with metal elements, with the highest percentage of calcium. The EDX was able to detect heavy metals in incinerator fly ash. The concentration of Zn in the fly ash exceeded QCVN 07:2009/BTNMT standards, indicating the high amounts of some elements that may be hazardous to the environment and human health. Using the SEM/EDX and XRF, the fly ash from the Soc Son landfill power plant was analyzed and discovered that it exceeds permissible limits for dangerous heavy elements. The most common inorganic elements are Ca, followed by Zn, Pb, Cd, and Ag. Fly ash is classed as hazardous waste due to its high concentration of heavy metals, which results from the combustion of municipal solid waste that has not been separated. Vietnam fights municipal solid waste incinerator fly ash production. Some nations stabilize fly ash to remove harmful components and use it in buildings. Stabilized fly ash makes unfired construction bricks and cement manufacturing components and combining fly ash with inorganic trash protects the environment.

Abstract Background Porcine epidemic diarrhoea (PED) is a highly contagious infectious disease with negative economic impacts on the swine industry. PED outbreaks were reported from 2009 to 2015, but sporadic infection has been observed until now in Vietnam. However, the seroprevalence of PEDV infection has not yet been reported for commercial pig farms in Vietnam. The aim of this study was to assess the seroprevalence of PEDV infection in Vietnamese pig farms to reveal the endemic status of PEDV in northern Vietnam. Results A serological survey of PEDV infection was carried out using indirect ELISA in commercial pig farms in Hai Duong, Hung Yen and Thai Binh provinces in northern Vietnam in 2019. Twenty sera were randomly collected from each of 10 commercial pig farms, from each province; none of the farms had vaccinated for PEDV. Serological evidence of natural PEDV infection, expressed as a high antibody titre, was observed in the pig farms in all 3 provinces. The OD values were significantly higher (p 0.05) were detected for seropositivity to PEDV based on locality, age, pig breed and farm size. Conclusions This study indicates serological evidence of natural PEDV infection with high antibody titre in commercial pig farms. PEDV infection was widespread among the pig population in these 3 provinces and that good management and strict biosecurity are needed at these pig farms.

In this work, we develop a model of an electrostatically actuated functionally graded (FG) microbeam under a longitudinal magnetic field based on the Euler-Bernoulli beam and nonlocal strain gradient theories to investigate the nonlinear vibration problem. The FG microbeam is placed between two electrodes, a DC voltage applied between the two fixed electrodes causes an electrostatic force to be exerted on the FG microbeam. The FG microbeam is composed of metal and ceramic in which the properties of these materials are assumed to change in the thickness direction according to the simple power-law distribution. The Galerkin method and the Hamiltonian Approach are employed to find the approximate frequency of the FG microbeam. The accuracy of the present solution is verified by comparing the obtained results with the numerical results and the published results in the literature. Effects of the power-law index, the material length scale parameter, the nonlocal parameter, the applied voltage and the magnetic force on the nonlinear vibration behaviour of the FG microbeam are studied and discussed.

7-O-Galloyltricetifavan (7OGT), a natural flavonoid, is isolated from the leaves of Pithecellobium clypearia. The compound exhibits a variety of biological activities. This study details the evaluation of the HOO• antiradical activity of 7OGT by quantum chemistry calculations. The HOO• trapping activity of 7OGT in the gas phase (reference state) was discovered to follow the formal hydrogen transfer mechanism with a rate constant of k = 4.58 × 108 M−1 s−1. In physiological environments, 7OGT is predicted to be an excellent HOO• radical scavenger with koverall = 2.65 × 108 and 1.40 × 104 M−1 s−1 in water and pentyl ethanoate solvents, respectively. The HOO• antiradical activity of 7OGT in water at physiological pH is approximately 2000 times that of Trolox and substantially higher than that of other well-known natural antioxidants such as trans-resveratrol or ascorbic acid. Thus, 7OGT is an excellent natural antioxidant in polar environments.

In this study, the performance of 17 different density functional theory functionals was compared for the calculation of the bond dissociation energy (BDE) values of X−H (X=C, N, O, S) bonds of aromatic compounds. The effect of the size of the basis set (expansions of 6-31(G)) was also assessed for the initial geometry and zero-point energy calculations, followed by the single-point BDE calculations with different model chemistries with the 6-311 + (3df,2p) basis set. It was found that the size of the basis set for geometry optimization has a much smaller effect on the accuracy of BDE than the choice of functional for the following single-point calculations. The M06-2X, M05-2X and M08−HX functionals yielded highly accurate BDE values compared to experimental data (with the average mean unsigned error MUE = 1.2–1.5 kcal mol−1), performing better than any of the other functionals. The results suggest that geometry optimization may be performed with B3LYP functional and a small basis set, whereas the M06-2X, M05-2X and M08-HX density functionals with a suitably large basis set offer the best method for calculating BDEs of ArX−H (X=C, N, O, S) bonds.

This study aims to determine emission source areas of fine particulate matter (PM2.5) in Ho Chi Minh (HCM) City, Vietnam, using a conditional bivariate probability function (CBPF) and hybrid receptor models, including three-dimensional potential source contribution function (3D-PSCF) and concentration-weighted trajectory (3D-CWT), considering latitudes, longitudes, and height of trajectory segments. Uncertainties of the CBPF and 3D-PSCF/3D-CWT were evaluated based on the 95th confidence intervals and 95% confidence levels, respectively. For the local scale, PM2.5 in HCM City was primarily emitted from shallow or common ground sources (e.g., vehicle emissions) throughout the year. Regarding non-local source areas, PM2.5 in HCM City is contributed by those originated from the East Sea (e.g., shipping emissions) and southeastern Vietnam (e.g., Binh Duong and Dong Nai provinces) having several industrial zones with PM2.5 emission sources, especially in the dry season (December to April of the following year). In the rainy season (May–November), PM2.5 derived from emission sources in the Mekong Delta (e.g., biomass burning) might be transported to HCM City. However, contribution of the non-local sources to PM2.5 pollution in HCM City during the rainy season is less important because of PM2.5 deposition stemmed from the high rainfall amount in this season.

Taking the model of interstitial alloy AB with a body-centred cubic structure and the condition of absolute stability for the crystalline state, we derive analytic expression for the temperature of the limit of absolute stability for the crystalline state, the melting temperature, and the equation for the melting curve of this alloy using the statistical moment method. The results allow us to determine the melting temperature of alloy AB under pressure as well as at zero pressure. In limit cases, we obtain the melting theory of main metal A with a body-centred cubic structure. The theoretical results are numerically applied for alloys FeH, FeSi and FeC using different potentials.

Despite the discovery of several closely related viruses in bats, the direct evolutionary progenitor of SARS-CoV-2 has not yet been identified. In this study, we investigated potential animal sources of SARS-related coronaviruses using archived specimens from Sunda pangolins (Manis javanica) and Chinese pangolins (Manis pentadactyla) confiscated from the illegal wildlife trade, and from common palm civets (Paradoxurus hermaphroditus) raised on wildlife farms in Viet Nam. A total of 696 pangolin and civet specimens were screened for the presence of viral RNA from five zoonotic viral families and from Sarbecoviruses using primers specifically designed for pangolin coronaviruses. We also performed a curated data collection of media reports of wildlife confiscation events involving pangolins in Viet Nam between January 2016 and December 2020, to illustrate the global pangolin supply chain in the context of Viet Nam where the trade confiscated pangolins were sampled for this study. All specimens from pangolins and civets sampled along the wildlife supply chains between February 2017 and July 2018, in Viet Nam and tested with conventional PCR assays designed to detect flavivirus, paramyxovirus, filovirus, coronavirus, and orthomyxovirus RNA were negative. Civet samples were also negative for Sarbecoviruses, but 12 specimens from seven live pangolins confiscated in Hung Yen province, northern Viet Nam, in 2018 were positive for Sarbecoviruses. Our phylogenetic trees based on two fragments of the RdRp gene revealed that the Sarbecoviruses identified in these pangolins were closely related to pangolin coronaviruses detected in pangolins confiscated from the illegal wildlife trade in Yunnan and Guangxi provinces, China. Our curated data collection of media reports of wildlife confiscation events involving pangolins in Viet Nam between January 2016 and December 2020, reflected what is known about pangolin trafficking globally. Pangolins confiscated in Viet Nam were largely in transit, moving toward downstream consumers in China. Confiscations included pangolin scales sourced originally from Africa (and African species of pangolins), or pangolin carcasses and live pangolins native to Southeast Asia (predominately the Sunda pangolin) sourced from neighboring range countries and moving through Viet Nam toward provinces bordering China.

Mexidol (MD, 2-ethyl-6-methyl-3-hydroxypyridine) is a registered therapeutic agent for the treatment of anxiety disorders. The chemical structure suggests that MD may also act as an antioxidant. In this study, the hydroperoxyl radical scavenging activity of MD was studied to establish baseline antioxidant activity, followed by an investigation of the effect of MD on the copper-catalysed oxidative damage in biological systems, using computational methods. It was found that MD exhibits moderate radical scavenging activity against HOO• in water and pentyl ethanoate solvents following the single electron transfer and formal hydrogen transfer mechanisms, respectively. MD can chelate Cu(II), forming complexes that are much harder to reduce than free Cu(II): MD chelation completely quenches the Cu(II) reduction by ascorbic acid and suppresses the rate of reduction reaction by [Formula: see text] that are the main reductants of Cu(II) in biological environments. Therefore, MD exerts its anti-HO• activity primarily as an OIL-1 inhibitor.

Honeybees play a vital role in the ecological environment and agricultural economy. Increasing evidence shows that the gut microbiome greatly influences the host’s health. Therefore, a thorough understanding of gut bacteria composition can lead to the development of probiotics specific for each development stage of honeybees. In this study, the gut microbiota at different developmental stages (larvae, pupae, and adults) of the honeybees Apis cerana in Hanoi, Vietnam, was assessed by sequencing the V3–V4 region in the 16S rRNA gene using the Illumina Miseq platform. The results indicated that the richness and diversity of the gut microbiota varied over the investigated stages of A. cenara. All three bee groups showed relative abundance at both phylum and family levels. In larvae, Firmicutes were the most predominant (81.55%); however, they decreased significantly along with the bee development (33.7% in pupae and 10.3% in adults) in favor of Proteobacteria. In the gut of adult bees, four of five core bacteria were found, including Gilliamella apicola group (34.01%) Bifidobacterium asteroides group (10.3%), Lactobacillus Firm-4 (2%), and Lactobacillus Firm-5 (1%). In contrast, pupae and larvae lacked almost all core bacteria except G. apicola (4.13%) in pupae and Lactobacillus Firm-5 (4.04%) in larvae. This is the first report on the gut microbiota community at different developmental stages of A. cerana in Vietnam and provides potential probiotic species for beekeeping.

Abstract Background Patient experience with primary health care services can vary markedly between different types of health care facilities, even within the same country setting. Given known benefits of high quality primary health care, the performance of these facilities may significantly impact population health. The aim of this study was to compare the quality of primary care in different types of health facilities as experienced by Vietnamese consumers. Methods 1662 people who utilized primary health care services at least once over the past two years in various types of facilities in central Vietnam were surveyed in a cross-sectional study using the Vietnamese version of the Primary Care Assessment Tool (VN PCAT-AE) to assess overall primary care quality as well as several different domains of high quality primary care services. Results Commune health centers were associated with the highest overall primary care quality (PCAT expanded score 21.07, p

Outbreaks of emerging coronaviruses in the past two decades and the current pandemic of a novel coronavirus (SARS-CoV-2) that emerged in China highlight the importance of this viral family as a zoonotic public health threat. To gain a better understanding of coronavirus presence and diversity in wildlife at wildlife-human interfaces in three southern provinces in Viet Nam 2013-2014, we used consensus Polymerase Chain Reactions to detect coronavirus sequences. In comparison to previous studies, we observed high proportions of positive samples among field rats (34.0%, 239/702) destined for human consumption and insectivorous bats in guano farms (74.8%, 234/313) adjacent to human dwellings. Most notably among field rats, the odds of coronavirus RNA detection significantly increased along the supply chain from field rats sold by traders (reference group; 20.7% positivity, 39/188) by a factor of 2.2 for field rats sold in large markets (32.0%, 116/363) and 10.0 for field rats sold and served in restaurants (55.6%, 84/151). Coronaviruses were also detected in rodents on the majority of wildlife farms sampled (60.7%, 17/28). These coronaviruses were found in the Malayan porcupines (6.0%, 20/331) and bamboo rats (6.3%, 6/96) that are raised on wildlife farms for human consumption as food. We identified six known coronaviruses in bats and rodents, clustered in three Coronaviridae genera, including the Alpha-, Beta-, and Gammacoronaviruses. Our analysis also suggested either mixing of animal excreta in the environment or interspecies transmission of coronaviruses, as both bat and avian coronaviruses were detected in rodent feces on wildlife farms. The mixing of multiple coronaviruses, and their apparent amplification along the wildlife supply chain into restaurants, suggests maximal risk for end consumers and likely underpins the mechanisms of zoonotic spillover to people.

IntroductionMeasuring the performance of a primary care system is one of the very first steps to find out whether there is room for improvement. To obtain an objective and comprehensive view, this measurement should come from both the supply and demand sides of the system. Patients' experiences of primary care have been studied around the world, but much less energy has been invested in researching providers' perspectives. This research aims to explore how primary care physicians working at commune health centers in Vietnam evaluate their performance and their opinions on how to improve the quality of primary care services.Materials and methodsFirst, a quantitative study was conducted using the validated Vietnamese PCAT questionnaire-provider expanded version (VN PCAT PE) targeting all primary care physicians (PCPs) working at commune health centers in a province of Central Vietnam. Next, a qualitative study was carried out, consisting of in-depth interviews with PCPs, to better understand the results of the quantitative survey and gain insight on barriers of primary care services and how to overcome them.ResultsIn the quantitative portion of our study, 150 PCPs rated the quality of ongoing care and first contact in CHCs as the best (3.09 and 3.11 out of 4, respectively), and coordination as the worst performing core domain (2.53). Twenty-two PCPs also participated in our qualitative research. In regards to challenges that primary care physicians face during their daily practice, three central themes emerged: 1) patient factors such as client attitude and knowledge, 2) provider factors such as the burden of administrative work and lack of training opportunities, and 3) contextual factors such as low income and lack of resources including medicines and diagnostics. Participants recommended more health promotion campaigns in the media, increasing the number of services available at CHCs (such as being able to take blood samples), reducing the workload related to administration for CHC leaders, greater government subsidies, and providing more training courses for PCPs.ConclusionsFindings from this study offer a valuable view from the supply-side of the primary care system, specifically those who directly deliver primary care services. Along with the earlier study on consumers' evaluation of the Vietnamese primary care system, and literature from other low and middle-income countries, these findings offer emerging evidence for policymakers to improve the quality of primary care in Vietnam.

We demonstrate a dual-band, polarization-insensitive, ultrathin and flexible metamaterial absorber (MA), based on high-order magnetic resonance. By exploiting a flexible polyimide substrate, the thickness of MA came to be 1/148 of the working wavelength. The absorption performance of the proposed structure was investigated for both planar and bending models. In the case of the planar model, a single peak was achieved at a frequency of 4.3 GHz, with an absorption of 98%. Furthermore, additional high-order absorption peaks were obtained by the bending structure on a cylindrical surface, while the fundamental peak with a high absorption was maintained well. Our work might be useful for the realization and the development of future devices, such as emitters, detectors, sensors, and energy converters.

Scrub typhus has been documented since 1932 in Vietnam, however, the disease burden of scrub typhus remains poorly understood in the country. We conducted this study to describe the phylogenetic analysis of the 56-kDa type-specific antigen (TSA) gene of Orientia tsutsugamushi associated with PCR positive cases of scrub typhus. Of 116 positive samples, 65 type-specific antigen gene sequences were obtained and classified into 3 genogroups: Karp, Kato and Gilliam. The Karp genogroup was the most frequently detected phylogenetic cluster in the study with 30 samples (46%), followed by Kato and Gilliam with 20 (31%) and 15 (23%), respectively. All sequences showed 94-100% nucleotide similarity to reference sequences collected in the central part of Vietnam in 2017. Patients infected with Karp genogroup were more likely to have significant thrombocytopenia than the other genogroups. These results suggest that any scrub typhus vaccine considered for use in Vietnam should provide protection against each of these 3 genogroups.

Craft village is one of the distinct features of rural areas and an important factor in industrial and secondary manufacturing zones and subzones in Vietnam. Craft village, in nature, is a guild within a village who earn their living through non-agricultural activities. Craft village has been long preserved and developed with various characteristics including production subject (artisan); produce (featured by sophistication and arts); natural condition and specific technological process. In the context of industrialization and modernization being interwined with sustainable development, this article provides an insight into environmental protection policies applied to craft villages in Hanoi in order to understand the situation of executing environmental protection policies for craft villages in Hanoi; to point out challenges in formulating and implementing the policies; to therefore propose measures to develop the policies and enhance the implementation effectiveness.

In the current context, the training for cadres and civil servants is crucial to the operations of the civil service system. However, it is influenced by many factors, affecting its effectiveness in practice. This article makes mention of factors affecting the quality of training and retraining for cadres and civil servants, such as policy institution, management, inspection, supervision and curriculum, etc., Therefore, identifying factors affecting the training and retraining is to find suitable solutions, making an important contribution to improve the capacity of cadres and public servants as well as the effectiveness of public service.

Three-phase two-level inverters using space vector modulation (SVPWM) technology are one of the most popular inverter architectures today. The process of designing and manufacturing inverter systems usually goes through the following stages: simulation, hardware design, software programming on MCU, editing … In this article, we will focus on problem researching and implementing the SVPWM algorithm on an Arduino in detail. Besides, it is also based on the experimental survey of the inverter’s parameters, analyzing and proposing improved solutions for the inverter to operate optimally. SVPWM algorithm is tested on Arduino Mega 2560 board and small power inverter model.

Improving quality of life (QOL) is an important objective. This study measured the QOL of farmers in rural areas in Vietnam using the WHOQOL-BREF. 600 farmers from 5 provinces in Vietnam participated in the study. Farmers reported low QOL, with psychological dimension had the highest QOL score and environmental dimension had lowest QOL. Male, young, well-educated, married, healthy farmers and farmers who had average living standard, living in small families, living with having less than 3 working members, and have savings were more likely to have higher QOL. However, only 3 factors predicted QOL: education, living standard and number of working members. Implications on Vietnamese family culture and the role of agriculture in modern society were discussed.

To adapt the consumer version of the Primary Care Assessment Tool (PCAT) for Vietnam and determine its internal consistency and validity.A quantitative cross sectional study.56 communes in 3 representative provinces of central Vietnam.Total of 3289 people who used health care services at health facility at least once over the past two years.The Vietnamese adult expanded consumer version of the PCAT (VN PCAT-AE) is an instrument for evaluation of primary care in Vietnam with 70 items comprising six scales representing four core primary care domains, and three additional scales representing three derivative domains. Sixteen other items from the original tool were not included in the final instrument, due to problems with missing values, floor or ceiling effects, and item-total correlations. All the retained scales have a Cronbach's alpha above 0.70 except for the subscale of Family Centeredness.The VN PCAT-AE demonstrates adequate internal consistency and validity to be used as an effective tool for measuring the quality of primary care in Vietnam from the consumer perspective. Additional work in the future to optimize valid measurement in all domains consistent with the original version of the tool may be helpful as the primary care system in Vietnam further develops.