Objective:To investigate the prevalence and risk factors associated with long COVID symptoms among children and adolescents who have recovered from COVID-19.Methods:This study applied a cross-sectional approach within...Objective:To investigate the prevalence and risk factors associated with long COVID symptoms among children and adolescents who have recovered from COVID-19.Methods:This study applied a cross-sectional approach within community settings in a southern province of Vietnam.A structured questionnaire featuring socio-demographic information and common long COVID symptoms was employed.Phi correlation coefficients assessed associations among pairs of long COVID symptoms.Additionally,multivariable logistic regression models were performed to investigate the risk factors of long COVID in recovered COVID-19 children and adolescents.Results:Among 422 participants,39.3%reported long COVID symptoms,with a prevalence of 45.2%(SD=0.5)in children and 22.2%(SD=0.4)in adolescents.Common symptoms reported were cough 34.6%(SD=0.5),fatigue 20.6%(SD=0.4),shortness of breath 10.9%(SD=0.3),and lack of appetite 6.6%(SD=0.3).Concerning risk factors of long COVID,a higher risk was observed among demographic groups,including girls(OR 1.25,95%CI 1.15-1.37;P<0.001,reference:boys),children compared to adolescents(OR 1.24,95%CI 1.12-1.37;P<0.001),overweight individuals(OR 1.14,95%CI 1.02-1.27;P=0.018,reference:healthy weight),and participants without any COVID-19 vaccination(OR 1.36,95%CI 1.20-1.54;P<0.001),or have received only one single dose(OR 1.35,95%CI 1.10-1.64;P=0.004)compared to those who have received two doses.Besides,patients with a COVID-19 treatment duration exceeding two weeks also had a higher risk of long COVID(OR 1.32,95%CI 1.09-1.60;P=0.003)than those who recovered less than seven days.Conclusions:The insights from this study provide crucial guidance for predicting the factors associated with the occurrence of long COVID in pediatric patients,contributing to strategic interventions aimed at mitigating the long COVID risks among children and adolescents in Vietnam.展开更多
Objective:To investigate the evolving patterns of antimicrobial resistance against beta-lactam antibiotics in Escherichia coli isolates from urinary tract infection patients in Vietnam,covering the period from 2005 to...Objective:To investigate the evolving patterns of antimicrobial resistance against beta-lactam antibiotics in Escherichia coli isolates from urinary tract infection patients in Vietnam,covering the period from 2005 to 2022.Methods:29 Descriptive studies published between 2010 and 2022 in English and Vietnamese were included in the analysis.Data on resistance rates to beta-lactam antibiotics,including cephalosporins and carbapenems,were extracted and analyzed.Weighted pooled resistance rates were calculated using random-effects models.Annual trends in resistance were assessed using linear regression analysis.Results:Among the beta-lactam antibiotics studied,Escherichia coli exhibited varying levels of resistance,with cephalosporins showing higher resistance rates compared to carbapenems.Weighted pooled resistance rates were 66%for cefotaxime,65%for ceftriaxone,54%for ceftazidime,and 56%for cefepime.In contrast,carbapenems demonstrated lower resistance rates,with weighted pooled resistance rates ranging from 3%to 4%for meropenem,ertapenem,and imipenem.Resistance rates were also observed for amoxicillin/clavulanate(35%),ticarcillin/clavulanate(26%),and piperacillin/tazobactam(12%).Significant annual increases in resistance were noted for imipenem(0.56%,P<0.001).Conclusions:This study highlights the critical issue of antimicrobial resistance in urinary tract infections in Vietnam and emphasizes the importance of prudent antibiotic use and the regular monitoring of resistance patterns.These insights are useful for guiding healthcare professionals in optimizing treatment strategies and for policymakers in formulating evidence-based clinical guidelines to combat antibiotic resistance effectively.展开更多
Hoi An Ancient Town in Vietnam is not only a UNESCO(United Nations Educational,Scientific,and Cultural Organization)World Heritage Site but also a convergence point of traditional and modern cultures.Throughout its hi...Hoi An Ancient Town in Vietnam is not only a UNESCO(United Nations Educational,Scientific,and Cultural Organization)World Heritage Site but also a convergence point of traditional and modern cultures.Throughout its historical transitions,the cultural heritage of Hoi An Ancient Town has been well preserved and developed,and the worship of Mazu,an essential component of Hoi An’s culture,is no exception.As far as is known,Hoi An in central Vietnam houses the most Mazu temples,including the Chung Wah Hall,the Guangzhou Assembly Hall,the Fujian Assembly Hall,the Teochew Assembly Hall,and the Hainan Assembly Hall,among others,with the Fujian Assembly Hall being the most vibrant center of Mazu worship.This study employs field surveys and literature research to explore the Mazu worship practices at the Fujian Assembly Hall in Hoi An,Quang Nam Province,Vietnam.展开更多
On August 20,2024,General Secretary of the Communist Party of Vietnam(CPV)Central Committee and Vietnamese President To Lam concluded his state visit to China.China was the destination for Lam's first overseas vis...On August 20,2024,General Secretary of the Communist Party of Vietnam(CPV)Central Committee and Vietnamese President To Lam concluded his state visit to China.China was the destination for Lam's first overseas visit after taking office as general secretary of the CPV Central Committee,which clearly demonstrates that the heads of both countries attach importance to developing the bilateral relations and that Vietnam regards China as the strategic choice and top priority for its foreign policy.展开更多
Chinese President Xi Jinping made a state visit to Vietnam from December 12 to 13,2023.During the two-day visit,China and Vietnam issued a joint statement on continuing to deepen and elevate their comprehensive strate...Chinese President Xi Jinping made a state visit to Vietnam from December 12 to 13,2023.During the two-day visit,China and Vietnam issued a joint statement on continuing to deepen and elevate their comprehensive strategic cooperative partnership and building a community with a shared future that carries strategic significance.The two sides also signed more than 30 agreements on bilateral cooperation.These developments injected strong momentum into China-Vietnam relations and elevated bilateral ties to a new height.展开更多
As the inaugural Vietnam International Trade Fair for Apparel,Textiles and Textile Technologies(VIATT)drew curtains on 1 March 2024,Messe Frankfurt's first inte-grated textile fair in Asia has positioned itself as...As the inaugural Vietnam International Trade Fair for Apparel,Textiles and Textile Technologies(VIATT)drew curtains on 1 March 2024,Messe Frankfurt's first inte-grated textile fair in Asia has positioned itself as an essential platform for the entire textile value chain.Covering three major industry sectors,the three-day fair attracted 17262 visits from 55 countries and regions,connecting with 409 exhibitors from 17 countries and regions.In addition to atracting top-quality suppliers,participants also noted the high calibre of buyers and the dlear potential for growth at future editions.展开更多
Flash floods are one of the most dangerous natural disasters,especially in hilly terrain,causing loss of life,property,and infrastructures and sudden disruption of traffic.These types of floods are mostly associated w...Flash floods are one of the most dangerous natural disasters,especially in hilly terrain,causing loss of life,property,and infrastructures and sudden disruption of traffic.These types of floods are mostly associated with landslides and erosion of roads within a short time.Most of Vietnamis hilly and mountainous;thus,the problem due to flash flood is severe and requires systematic studies to correctly identify flood susceptible areas for proper landuse planning and traffic management.In this study,three Machine Learning(ML)methods namely Deep Learning Neural Network(DL),Correlation-based FeatureWeighted Naive Bayes(CFWNB),and Adaboost(AB-CFWNB)were used for the development of flash flood susceptibility maps for hilly road section(115 km length)of National Highway(NH)-6 inHoa Binh province,Vietnam.In the proposedmodels,88 past flash flood events were used together with 14 flash floods affecting topographical and geo-environmental factors.The performance of themodels was evaluated using standard statisticalmeasures including Receiver Operating Characteristic(ROC)Curve,Area Under Curve(AUC)and Root Mean Square Error(RMSE).The results revealed that all the models performed well(AUC>0.80)in predicting flash flood susceptibility zones,but the performance of the DL model is the best(AUC:0.972,RMSE:0.352).Therefore,the DL model can be applied to develop an accurate flash flood susceptibility map of hilly terrain which can be used for proper planning and designing of the highways and other infrastructure facilities besides landuse management of the area.展开更多
Agent Blue, a mixture of cacodylic acid (CH<sub>3</sub>) As O<sub>2</sub>H) and sodium cacodylate (C<sub>2</sub>H<sub>6</sub> AsNaO<sub>2</sub>), was a tacti...Agent Blue, a mixture of cacodylic acid (CH<sub>3</sub>) As O<sub>2</sub>H) and sodium cacodylate (C<sub>2</sub>H<sub>6</sub> AsNaO<sub>2</sub>), was a tactical arsenic-based herbicide used during the Vietnam War to destroy grasses and rice crops. Natural and synthetic sources of arsenic can degrade into water-soluble forms and persist in groundwater and potentially contribute to elevating As levels in drinking water. The United States Department of Defense (DOD) and United States Department of Agricultural (USDA) Operation Ranch Hand records for tactical herbicides including Agent Blue sprayed in southern Vietnam during the Vietnam War (1961-1971) are very detailed, rather complete and publicly available. The same is not true for tactical herbicides sprayed by the Republic of Vietnam (RV) during the Khai Quang program which was supported by the U.S. Army, U.S. Navy and Central Intelligence Agency (CIA) in the Mekong Delta. Agent Blue was sprayed by the RV military for three years before the official start of the American-Vietnam War. Few, if any, RV military, US Army, US Navy and CIA spray records exist from 1962 to 1965. Vietnam War veterans, historians and scholars have reported the spraying of 3.2 million liters (468,008 kg As) of Agent Blue on rice paddies and mangrove forests in the Mekong Delta and Central Highlands by the RV military with the support of the US Army, US Navy and CIA. The Institute of Medicine estimated that 3.2 million liters (468,000 kg As) were sprayed during the RV Khai Quang program. This was in addition to the U.S. Air Force’s Operation Ranch Hand spraying of the tactical herbicide Agent Blue primarily by C-123 aircraft. The Operation Ranch Hand missions maintained location and quantities of herbicides sprayed (over 4,712,000 liters (664,392 kg As) from 1961-1971. The RV military and US military (Army and Navy) spray equipment included hand and backpack sprayers, sprayers mounted on Brown Water Navy boats, on Army track vehicles and Army land-based helicopters and helicopters based on the decks of Blue Water Navy ships. Some of these spray missions were a military secret and spray records were classified or if kept were not maintained. Agent Blue containing cacodylic acid had a short half-life and degraded to water-soluble arsenic, which was released into the surface water and/or leached into the groundwater. Once the water-soluble arsenic leached into the Vietnam Mekong Delta groundwater, the arsenic-rich water was pumped back to the surface by tens of thousands of tube wells for urban and agricultural use. The primary objectives of this research are to explore the conditions during the Vietnam War under which 1) the RV military herbicide spray program with the support of the US Navy, CIA and US Army, and 2) the US Air Force spray program during Operation Ranch Hand may have significantly contributed to the natural and anthropic As spikes found in the Mekong Delta today. The environmental impacts of Agent Blue, on the Menominee River at manufacturing sites in the United States, were studied to identify possible As remediation and mitigation strategies. The lessons previously learned at the manufacturing sites in Wisconsin and Michigan, United States can be considered and applied to the Mekong Delta to help mitigate and remediate the arsenic-rich surface water, soil, sediment and groundwater found in the Mekong Delta.展开更多
DEAR EDITOR,We describe a new species of Nanohyla from the Song Hinh Protected Forest in Phu Yen Province,southern Vietnam,based on an integrative taxonomic approach.The new species represents a divergent lineage(16S ...DEAR EDITOR,We describe a new species of Nanohyla from the Song Hinh Protected Forest in Phu Yen Province,southern Vietnam,based on an integrative taxonomic approach.The new species represents a divergent lineage(16S rRNA gene uncorrected P-distance>5.3%),which clearly differs from any other Nanohyla species based on a series of morphological characters,most notably the presence of white spots on the top of its head.Morphologically,Nanohyla albopunctata sp.nov.is characterized by small body size(male snout-vent length(SVL)18.2-20.2 mm);moderately slender body habitus;rounded snout;distinct tympanum;rounded canthus rostralis;loreal region slightly concave;skin on dorsum tubercular,ventral surfaces smooth;mid-vertebral skin ridge and dorsomedial stripe absent;superciliary tubercles absent.展开更多
In recent years,the China-Vietnam com-prehensive strategic and cooperative partnership has been tightened,and the economic and trade relations between the two countries have deepened,along with the level of bilateral ...In recent years,the China-Vietnam com-prehensive strategic and cooperative partnership has been tightened,and the economic and trade relations between the two countries have deepened,along with the level of bilateral trade,cooperation in terms of the production capacity and the infrastructure interconnection has also continuously improved,bringing tangible benefits to the people of both countries.展开更多
On September 10 after the G20 Summit in New Dehli,U.S.President Joe Biden traveled by Air Force One to Hanoi,Vietnam,for a state visit.There,he met with Nguyen Phu Trong,general secretary of the Communist Party of Vie...On September 10 after the G20 Summit in New Dehli,U.S.President Joe Biden traveled by Air Force One to Hanoi,Vietnam,for a state visit.There,he met with Nguyen Phu Trong,general secretary of the Communist Party of Vietnam(CPV)Central Committee,and other senior state leaders to exchange views on how to deepen cooperation between the two countries.展开更多
According to the newest Vietnam Macro Monitoring,an economic report released by World Bank,Vietnam’s economy slowed to 3.32 percent year-on-year in the first quarter,falling short of the anticipated 4.8 percent.The f...According to the newest Vietnam Macro Monitoring,an economic report released by World Bank,Vietnam’s economy slowed to 3.32 percent year-on-year in the first quarter,falling short of the anticipated 4.8 percent.The figure stands as the second-lowest first-quarter data in the past 12 years.展开更多
The high temperatures and heat waves in Vietnam have caused local residents’demand for electricity to surge,while the output of hydropower has declined.As a result,the power supply has frequently failed in many parts...The high temperatures and heat waves in Vietnam have caused local residents’demand for electricity to surge,while the output of hydropower has declined.As a result,the power supply has frequently failed in many parts of Vietnam.Since early June,north-central Vietnam has experienced unusually high temperatures that soared to 37-43 degrees Celsius at noon.Nguyen Quoc Trung,deputy director of the National Load Dispatch Center of Vietnam(EVNNLDC),said that grid demand has increased by 20 percent as the use of air conditioners and electric fans has surged.At the same time,high temperatures have caused the reservoirs behind most hydropower plants in northern Vietnam to be“at dead water levels,”unable to support the local power system.Chen Yuehe,director of the Power Regulation Bureau of the Ministry of Industry and Trade of Vietnam(MOIT),said that the current electricity that can be mobilized in the northern Vietnam power system accounts for about 59.2 percent of the installed capacity.展开更多
[Objective] The aim was to screen longan varieties suitable for local production in Vietnam.[Method] The fruit botanical characteristics and quality characteristics of longan varieties introduced into Northern Mountai...[Objective] The aim was to screen longan varieties suitable for local production in Vietnam.[Method] The fruit botanical characteristics and quality characteristics of longan varieties introduced into Northern Mountainous Agriculture and Forestry Science Institute of Vietnam Academy of Agriculture Sciences were compared and analyzed.[Result] Two varieties with good general qualities including PMP6 and PHS1-1 which were suitable to be cultivated in the local area were selected.In addition,Phu Dong was the available processed germplasm resource.[Conclusion] This research will provide reference for longan production and breeding in Northern Mountainous.展开更多
[Objective] The aim was to screen litchi varieties suitable for local production in Vietnam. [Method] The fruit botanical and quality characteristics of the seven litchi varieties introduced into Northern Mountainous ...[Objective] The aim was to screen litchi varieties suitable for local production in Vietnam. [Method] The fruit botanical and quality characteristics of the seven litchi varieties introduced into Northern Mountainous Agriculture and Forestry Science Institute of Vietnam Academy of Agriculture Sciences were compared and analyzed. [Result] Three varieties with good general qualities including Lai Phu Ho,Thach Binh and Hung Long which were suitable to be cultivated in the local area were selected. In addition,Phu Dong was the available,early-maturing germplasm resource. [Conclusion] This research will provide reference for litchi production and breeding in northern mountainous area.展开更多
Itamus deuvei, sp. nov. is described from Tan Phu, near Ho Chi Minh City, southern Vietnam, based on seven specimens collected in a lava tube system. It is the second troglophile species of the genus Itamus Schmidt-Go...Itamus deuvei, sp. nov. is described from Tan Phu, near Ho Chi Minh City, southern Vietnam, based on seven specimens collected in a lava tube system. It is the second troglophile species of the genus Itamus Schmidt-Gobel and is easily distinguished from I. cavicola (Moore), the other troglophile from Papua New Guinea, by its more elongate body, longer antennae, head without a supraorbital setiferous pore, and very shallow and impunctate elytral striae.展开更多
Based on the similarity in geographic and climatic conditions between Guangxi and Vietnam, a new extension model, i.e., variety prescreening test in Nanning-variety screening tests in Vietnam-multi-location test and d...Based on the similarity in geographic and climatic conditions between Guangxi and Vietnam, a new extension model, i.e., variety prescreening test in Nanning-variety screening tests in Vietnam-multi-location test and demonstration in Vietnam-commercial production in Vietnam, was put forward for rapid extension of the hybrid rice varieties from Guangxi, China in Vietnam. Through practice, this model had a very good effect on a group of hybrid rice varieties like Teyou 136 selected for rapid extension in Vietnam. Besides, some suggestions were offered for the extension of Guangxi hybrid rice varieties in Vietnam.展开更多
The little known harpactorine species, Agyrius watanabeorum Ishikawa, 2002, is redescribed based on the material from China and Vietnam. The characters of phallus are reported for the first time. The dorsal ...The little known harpactorine species, Agyrius watanabeorum Ishikawa, 2002, is redescribed based on the material from China and Vietnam. The characters of phallus are reported for the first time. The dorsal habitus, head, male genitalia and other diagnostic morphological features are illustrated. The genus Agyrius St?l, 1863 and A. watanabeorum Ishikawa, 2002 are new records to China and Vietnam. This is the northernmost distributional record of the genus and the species.展开更多
文摘Objective:To investigate the prevalence and risk factors associated with long COVID symptoms among children and adolescents who have recovered from COVID-19.Methods:This study applied a cross-sectional approach within community settings in a southern province of Vietnam.A structured questionnaire featuring socio-demographic information and common long COVID symptoms was employed.Phi correlation coefficients assessed associations among pairs of long COVID symptoms.Additionally,multivariable logistic regression models were performed to investigate the risk factors of long COVID in recovered COVID-19 children and adolescents.Results:Among 422 participants,39.3%reported long COVID symptoms,with a prevalence of 45.2%(SD=0.5)in children and 22.2%(SD=0.4)in adolescents.Common symptoms reported were cough 34.6%(SD=0.5),fatigue 20.6%(SD=0.4),shortness of breath 10.9%(SD=0.3),and lack of appetite 6.6%(SD=0.3).Concerning risk factors of long COVID,a higher risk was observed among demographic groups,including girls(OR 1.25,95%CI 1.15-1.37;P<0.001,reference:boys),children compared to adolescents(OR 1.24,95%CI 1.12-1.37;P<0.001),overweight individuals(OR 1.14,95%CI 1.02-1.27;P=0.018,reference:healthy weight),and participants without any COVID-19 vaccination(OR 1.36,95%CI 1.20-1.54;P<0.001),or have received only one single dose(OR 1.35,95%CI 1.10-1.64;P=0.004)compared to those who have received two doses.Besides,patients with a COVID-19 treatment duration exceeding two weeks also had a higher risk of long COVID(OR 1.32,95%CI 1.09-1.60;P=0.003)than those who recovered less than seven days.Conclusions:The insights from this study provide crucial guidance for predicting the factors associated with the occurrence of long COVID in pediatric patients,contributing to strategic interventions aimed at mitigating the long COVID risks among children and adolescents in Vietnam.
文摘Objective:To investigate the evolving patterns of antimicrobial resistance against beta-lactam antibiotics in Escherichia coli isolates from urinary tract infection patients in Vietnam,covering the period from 2005 to 2022.Methods:29 Descriptive studies published between 2010 and 2022 in English and Vietnamese were included in the analysis.Data on resistance rates to beta-lactam antibiotics,including cephalosporins and carbapenems,were extracted and analyzed.Weighted pooled resistance rates were calculated using random-effects models.Annual trends in resistance were assessed using linear regression analysis.Results:Among the beta-lactam antibiotics studied,Escherichia coli exhibited varying levels of resistance,with cephalosporins showing higher resistance rates compared to carbapenems.Weighted pooled resistance rates were 66%for cefotaxime,65%for ceftriaxone,54%for ceftazidime,and 56%for cefepime.In contrast,carbapenems demonstrated lower resistance rates,with weighted pooled resistance rates ranging from 3%to 4%for meropenem,ertapenem,and imipenem.Resistance rates were also observed for amoxicillin/clavulanate(35%),ticarcillin/clavulanate(26%),and piperacillin/tazobactam(12%).Significant annual increases in resistance were noted for imipenem(0.56%,P<0.001).Conclusions:This study highlights the critical issue of antimicrobial resistance in urinary tract infections in Vietnam and emphasizes the importance of prudent antibiotic use and the regular monitoring of resistance patterns.These insights are useful for guiding healthcare professionals in optimizing treatment strategies and for policymakers in formulating evidence-based clinical guidelines to combat antibiotic resistance effectively.
基金sponsored by the 2021 Research Project of Hainan Research Center for Applied Foreign Languages(HNWYJD21-05)by the Scientific Research Project of Hainan Higher Education Institutions(Hnky2023-20).
文摘Hoi An Ancient Town in Vietnam is not only a UNESCO(United Nations Educational,Scientific,and Cultural Organization)World Heritage Site but also a convergence point of traditional and modern cultures.Throughout its historical transitions,the cultural heritage of Hoi An Ancient Town has been well preserved and developed,and the worship of Mazu,an essential component of Hoi An’s culture,is no exception.As far as is known,Hoi An in central Vietnam houses the most Mazu temples,including the Chung Wah Hall,the Guangzhou Assembly Hall,the Fujian Assembly Hall,the Teochew Assembly Hall,and the Hainan Assembly Hall,among others,with the Fujian Assembly Hall being the most vibrant center of Mazu worship.This study employs field surveys and literature research to explore the Mazu worship practices at the Fujian Assembly Hall in Hoi An,Quang Nam Province,Vietnam.
文摘On August 20,2024,General Secretary of the Communist Party of Vietnam(CPV)Central Committee and Vietnamese President To Lam concluded his state visit to China.China was the destination for Lam's first overseas visit after taking office as general secretary of the CPV Central Committee,which clearly demonstrates that the heads of both countries attach importance to developing the bilateral relations and that Vietnam regards China as the strategic choice and top priority for its foreign policy.
文摘Chinese President Xi Jinping made a state visit to Vietnam from December 12 to 13,2023.During the two-day visit,China and Vietnam issued a joint statement on continuing to deepen and elevate their comprehensive strategic cooperative partnership and building a community with a shared future that carries strategic significance.The two sides also signed more than 30 agreements on bilateral cooperation.These developments injected strong momentum into China-Vietnam relations and elevated bilateral ties to a new height.
文摘As the inaugural Vietnam International Trade Fair for Apparel,Textiles and Textile Technologies(VIATT)drew curtains on 1 March 2024,Messe Frankfurt's first inte-grated textile fair in Asia has positioned itself as an essential platform for the entire textile value chain.Covering three major industry sectors,the three-day fair attracted 17262 visits from 55 countries and regions,connecting with 409 exhibitors from 17 countries and regions.In addition to atracting top-quality suppliers,participants also noted the high calibre of buyers and the dlear potential for growth at future editions.
基金funded by Vietnam National Foundation for Science and Technology Development (NAFOSTED)under Grant No.105.08-2019.03.
文摘Flash floods are one of the most dangerous natural disasters,especially in hilly terrain,causing loss of life,property,and infrastructures and sudden disruption of traffic.These types of floods are mostly associated with landslides and erosion of roads within a short time.Most of Vietnamis hilly and mountainous;thus,the problem due to flash flood is severe and requires systematic studies to correctly identify flood susceptible areas for proper landuse planning and traffic management.In this study,three Machine Learning(ML)methods namely Deep Learning Neural Network(DL),Correlation-based FeatureWeighted Naive Bayes(CFWNB),and Adaboost(AB-CFWNB)were used for the development of flash flood susceptibility maps for hilly road section(115 km length)of National Highway(NH)-6 inHoa Binh province,Vietnam.In the proposedmodels,88 past flash flood events were used together with 14 flash floods affecting topographical and geo-environmental factors.The performance of themodels was evaluated using standard statisticalmeasures including Receiver Operating Characteristic(ROC)Curve,Area Under Curve(AUC)and Root Mean Square Error(RMSE).The results revealed that all the models performed well(AUC>0.80)in predicting flash flood susceptibility zones,but the performance of the DL model is the best(AUC:0.972,RMSE:0.352).Therefore,the DL model can be applied to develop an accurate flash flood susceptibility map of hilly terrain which can be used for proper planning and designing of the highways and other infrastructure facilities besides landuse management of the area.
文摘Agent Blue, a mixture of cacodylic acid (CH<sub>3</sub>) As O<sub>2</sub>H) and sodium cacodylate (C<sub>2</sub>H<sub>6</sub> AsNaO<sub>2</sub>), was a tactical arsenic-based herbicide used during the Vietnam War to destroy grasses and rice crops. Natural and synthetic sources of arsenic can degrade into water-soluble forms and persist in groundwater and potentially contribute to elevating As levels in drinking water. The United States Department of Defense (DOD) and United States Department of Agricultural (USDA) Operation Ranch Hand records for tactical herbicides including Agent Blue sprayed in southern Vietnam during the Vietnam War (1961-1971) are very detailed, rather complete and publicly available. The same is not true for tactical herbicides sprayed by the Republic of Vietnam (RV) during the Khai Quang program which was supported by the U.S. Army, U.S. Navy and Central Intelligence Agency (CIA) in the Mekong Delta. Agent Blue was sprayed by the RV military for three years before the official start of the American-Vietnam War. Few, if any, RV military, US Army, US Navy and CIA spray records exist from 1962 to 1965. Vietnam War veterans, historians and scholars have reported the spraying of 3.2 million liters (468,008 kg As) of Agent Blue on rice paddies and mangrove forests in the Mekong Delta and Central Highlands by the RV military with the support of the US Army, US Navy and CIA. The Institute of Medicine estimated that 3.2 million liters (468,000 kg As) were sprayed during the RV Khai Quang program. This was in addition to the U.S. Air Force’s Operation Ranch Hand spraying of the tactical herbicide Agent Blue primarily by C-123 aircraft. The Operation Ranch Hand missions maintained location and quantities of herbicides sprayed (over 4,712,000 liters (664,392 kg As) from 1961-1971. The RV military and US military (Army and Navy) spray equipment included hand and backpack sprayers, sprayers mounted on Brown Water Navy boats, on Army track vehicles and Army land-based helicopters and helicopters based on the decks of Blue Water Navy ships. Some of these spray missions were a military secret and spray records were classified or if kept were not maintained. Agent Blue containing cacodylic acid had a short half-life and degraded to water-soluble arsenic, which was released into the surface water and/or leached into the groundwater. Once the water-soluble arsenic leached into the Vietnam Mekong Delta groundwater, the arsenic-rich water was pumped back to the surface by tens of thousands of tube wells for urban and agricultural use. The primary objectives of this research are to explore the conditions during the Vietnam War under which 1) the RV military herbicide spray program with the support of the US Navy, CIA and US Army, and 2) the US Air Force spray program during Operation Ranch Hand may have significantly contributed to the natural and anthropic As spikes found in the Mekong Delta today. The environmental impacts of Agent Blue, on the Menominee River at manufacturing sites in the United States, were studied to identify possible As remediation and mitigation strategies. The lessons previously learned at the manufacturing sites in Wisconsin and Michigan, United States can be considered and applied to the Mekong Delta to help mitigate and remediate the arsenic-rich surface water, soil, sediment and groundwater found in the Mekong Delta.
基金Specimen collection and data analysis were supported by the Russian Science Foundation(22-14-00037)to N.A.P.
文摘DEAR EDITOR,We describe a new species of Nanohyla from the Song Hinh Protected Forest in Phu Yen Province,southern Vietnam,based on an integrative taxonomic approach.The new species represents a divergent lineage(16S rRNA gene uncorrected P-distance>5.3%),which clearly differs from any other Nanohyla species based on a series of morphological characters,most notably the presence of white spots on the top of its head.Morphologically,Nanohyla albopunctata sp.nov.is characterized by small body size(male snout-vent length(SVL)18.2-20.2 mm);moderately slender body habitus;rounded snout;distinct tympanum;rounded canthus rostralis;loreal region slightly concave;skin on dorsum tubercular,ventral surfaces smooth;mid-vertebral skin ridge and dorsomedial stripe absent;superciliary tubercles absent.
文摘In recent years,the China-Vietnam com-prehensive strategic and cooperative partnership has been tightened,and the economic and trade relations between the two countries have deepened,along with the level of bilateral trade,cooperation in terms of the production capacity and the infrastructure interconnection has also continuously improved,bringing tangible benefits to the people of both countries.
文摘On September 10 after the G20 Summit in New Dehli,U.S.President Joe Biden traveled by Air Force One to Hanoi,Vietnam,for a state visit.There,he met with Nguyen Phu Trong,general secretary of the Communist Party of Vietnam(CPV)Central Committee,and other senior state leaders to exchange views on how to deepen cooperation between the two countries.
文摘According to the newest Vietnam Macro Monitoring,an economic report released by World Bank,Vietnam’s economy slowed to 3.32 percent year-on-year in the first quarter,falling short of the anticipated 4.8 percent.The figure stands as the second-lowest first-quarter data in the past 12 years.
文摘The high temperatures and heat waves in Vietnam have caused local residents’demand for electricity to surge,while the output of hydropower has declined.As a result,the power supply has frequently failed in many parts of Vietnam.Since early June,north-central Vietnam has experienced unusually high temperatures that soared to 37-43 degrees Celsius at noon.Nguyen Quoc Trung,deputy director of the National Load Dispatch Center of Vietnam(EVNNLDC),said that grid demand has increased by 20 percent as the use of air conditioners and electric fans has surged.At the same time,high temperatures have caused the reservoirs behind most hydropower plants in northern Vietnam to be“at dead water levels,”unable to support the local power system.Chen Yuehe,director of the Power Regulation Bureau of the Ministry of Industry and Trade of Vietnam(MOIT),said that the current electricity that can be mobilized in the northern Vietnam power system accounts for about 59.2 percent of the installed capacity.
基金Supported by Introduction of Overseas Tropic Crops Germplasm Resources(948Program of China)(2010-G2-08)a Program for Construction of Modern Agriculture Industrial Technology System(nycytx-32-17)~~
文摘[Objective] The aim was to screen longan varieties suitable for local production in Vietnam.[Method] The fruit botanical characteristics and quality characteristics of longan varieties introduced into Northern Mountainous Agriculture and Forestry Science Institute of Vietnam Academy of Agriculture Sciences were compared and analyzed.[Result] Two varieties with good general qualities including PMP6 and PHS1-1 which were suitable to be cultivated in the local area were selected.In addition,Phu Dong was the available processed germplasm resource.[Conclusion] This research will provide reference for longan production and breeding in Northern Mountainous.
基金Supported by Introduction of Overseas Tropic Crop Germplasm Resources (948 Program of China)(2010-G2-08)a Grant from Modern Agricultural Industry Technology System Construction Program(nycytx-32-17)~~
文摘[Objective] The aim was to screen litchi varieties suitable for local production in Vietnam. [Method] The fruit botanical and quality characteristics of the seven litchi varieties introduced into Northern Mountainous Agriculture and Forestry Science Institute of Vietnam Academy of Agriculture Sciences were compared and analyzed. [Result] Three varieties with good general qualities including Lai Phu Ho,Thach Binh and Hung Long which were suitable to be cultivated in the local area were selected. In addition,Phu Dong was the available,early-maturing germplasm resource. [Conclusion] This research will provide reference for litchi production and breeding in northern mountainous area.
文摘Itamus deuvei, sp. nov. is described from Tan Phu, near Ho Chi Minh City, southern Vietnam, based on seven specimens collected in a lava tube system. It is the second troglophile species of the genus Itamus Schmidt-Gobel and is easily distinguished from I. cavicola (Moore), the other troglophile from Papua New Guinea, by its more elongate body, longer antennae, head without a supraorbital setiferous pore, and very shallow and impunctate elytral striae.
基金Supported by Guangxi Scientific Problem Tackling Project(GKH 15104003-2-1,GKH14125007-1-1,GKN 15104002-3-4)
文摘Based on the similarity in geographic and climatic conditions between Guangxi and Vietnam, a new extension model, i.e., variety prescreening test in Nanning-variety screening tests in Vietnam-multi-location test and demonstration in Vietnam-commercial production in Vietnam, was put forward for rapid extension of the hybrid rice varieties from Guangxi, China in Vietnam. Through practice, this model had a very good effect on a group of hybrid rice varieties like Teyou 136 selected for rapid extension in Vietnam. Besides, some suggestions were offered for the extension of Guangxi hybrid rice varieties in Vietnam.
基金The Project was supported by the National Natural Science Foundation of China (30370161 30430100)and the Natural Science Foundation of Beijing (6042014).
文摘The little known harpactorine species, Agyrius watanabeorum Ishikawa, 2002, is redescribed based on the material from China and Vietnam. The characters of phallus are reported for the first time. The dorsal habitus, head, male genitalia and other diagnostic morphological features are illustrated. The genus Agyrius St?l, 1863 and A. watanabeorum Ishikawa, 2002 are new records to China and Vietnam. This is the northernmost distributional record of the genus and the species.