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| 1 | Prediction of Flash Flood Susceptibility of Hilly Terrain Using Deep Neural Network:A Case Study of Vietnam显示文摘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. | Huong Thi Thanh Ngo Nguyen Duc Dam Quynh-Anh Thi Bui Nadhir Al-Ansari Romulus Costache Hang Ha Quynh Duy Bui Sy Hung Mai Indra Prakash Binh Thai Pham | 2023 | Computer Modeling in Engineering & Sciences2023，，6： | 2 |
| 2 | Upconversion luminescence of Gd2O3:Er3+and Gd2O3:Er3+/silica nanophosphors fabricated by EDTA combustion method显示文摘Gd2O3:Er^3+nanophosphors were fabricated by the combustion method in presence of Na2 ethylene diamine tetra acetic acid(EDTA-Na2)as fuel at not high temperature(≤350℃)within a very short time of 5 min.The added concentration of Er^3+ions in Gd2O3 matrix was changed from 0.5 mol%to 5.0 mol%.The X-ray diffraction pattern of samples indicates the monoclinic structure of Gd2O3:Er^3+.The morphology and chemical composition analysis of the Gd2O3:Er^3+samples are characterized by a field emission scanning electron microscope(FESEM)and a Fourier-transform infrared spectrometer(FTIR).The photoluminescence(PL),photo luminescence excitation(PLE)and upconversion(UC)at room temperature of the prepared materials with different concentrations of Er^3+were investigated.The PL of Gd2O3:Er^3+nanomaterials are shown in visible at 545,594,623,648,688 nm under excitation at 275 nm.The emission bands from transitions of Er^3+from 2P3/2 to 4F9/2 are observed,UC luminescent spectra of the Gd2O3:Er^3+/silica nanocomposites under 976 nm excitation show the bands at 548 and 670 nm.The influence of excitation power at 980 nm for transitions were measured and calculated.The results indicate that the upconversion process of Gd2O3:Er^3+/silica is two photons absorption mechanism.The low temperature dependence of UC luminescent intensities of the main bands of Gd2O3:Er^3+was investigated towards development of a nanotemperature sensor in the range of 10-300 K. | Le Quoc Minh Tran Kim Anh Nguyen Duy Hung Pham Thi Minh Chau Nguyen Thi Quy Hai Ho Van Tuyen Vu Thi Thai Ha Vu Duc Tu Wieslaw Strek | 2019 | Journal of Rare Earths2019，37，11： | 2 |
| 3 | Ecoregional variations of aboveground biomass and stand structure in evergreen broadleaved forests显示文摘Biotic and abiotic factors control aboveground biomass(AGB)and the structure of forest ecosystems.This study analyses the variation of AGB and stand structure of evergreen broadleaved forests among six ecoregions of Vietnam.A data set of 1731-ha plots from 52 locations in undisturbed old-growth forests was developed.The results indicate that basal area and AGB are closely correlated with annual precipitation,but not with annual temperature,evaporation or hours of sunshine.Basal area and AGB are positively correlated with trees>30 cm DBH.Most areas surveyed(52.6%)in these old-growth forests had AGB of 100–200 Mg ha^-1;5.2%had AGB of 400–500 Mg ha^-1,and 0.6%had AGB of>800 Mg ha^-1.Seventy percent of the areas surveyed had stand densities of 300–600 ind.ha^-1,and 64%had basal areas of 20–40 m^2 ha^-1.Precipitation is an important factor influencing the AGB of old-growth,evergreen broadleaved forests in Vietnam.Disturbances causing the loss of large-diameter trees(e.g.,>100 cm DBH)affects AGB but may not seriously affect stand density. | Tran Van Do Mamoru Yamamoto Osamu Kozan Vo Dai Hai Phung Dinh Trung Nguyen Toan Thang Lai Thanh Hai Vu Thanh Nam Trieu Thai Hung Hoang Van Thang Tran Duc Manh Cao Chi Khiem Vu Tien Lam Nguyen Quang Hung Tran Hoang Quy Pham Quang Tuyen Trinh Ngoc Bon Nguyen Thi Thu Phuong Ninh Viet Khuong Nguyen Van Tuan Dang Thi Hai Ha Tran Hai Long Dang Van Thuyet Dang Thinh Trieu Nguyen Van Thinh Tran Anh Hai Duong Quang Trung Nguyen Van Bich Dinh Hai Dang Pham Tien Dung Nguyen Huy Hoang Le Thi Hanh Phan Minh Quang Nguyen Thi Thuy Huong Hoang Thanh Son Nguyen Thanh Son Nguyen Thi Van Anh Nguyen Thi Hoai Anh Pham Dinh Sam Hoang Thi Nhung Hoang Van Thanh Nguyen Huu Thinh Tran Hong Van Ho Trung Luong Bui Kieu Hung | 2020 | Journal of Forestry Research2020，31，5： | 1 |
| 4 | Bacterial spores as vaccine vehicles 显示文摘 | Duc LH Hong HA Fairweather N | 2003 | Infect Immun2003，71，5： | 1 |
| 5 | Utility of urgent colonoscopy in acute lower gastro-intestinal bleeding:a single-center experience显示文摘Background.The role of urgent colonoscopy in lower gastro-intestinal bleeding(LGIB)remains controversial.Over the last two decades,a number of studies have indicated that urgent colonoscopy may facilitate the identification and treatment of bleeding lesions;however,studies comparing this approach to elective colonoscopy for LGIB are limited.Aims.To determine the utility and assess the outcome of urgent colonoscopy as the initial test for patients admitted to the intensive care unit(ICU)with acute LGIB.Methods.Consecutive patients who underwent colonoscopy at our institution for the initial evaluation of acute LGIB between January 2011 and January 2012 were analysed retrospectively.Patients were grouped into urgent vs.elective colonoscopy,depending on the timing of colonoscopy after admission to the ICU.Urgent colonoscopy was defined as being performed within 24 hours of admission and those performed later than 24 hours were considered elective.Outcomes included length of hospital stay,early re-bleeding rates,and the need for additional diagnostic or therapeutic interventions.Multivariable logistic regression analysis was performed to identify factors associated with increased transfusion requirements.Results.Fifty-seven patients underwent colonoscopy for the evaluation of suspected LGIB,24 of which were urgent.There was no significant difference in patient demographics,co-morbidities,or medications between the two groups.Patients who underwent urgent colonoscopy were more likely to present with hemodynamic instability(P=0.019)and require blood transfusions(P=0.003).No significant differences in length of hospital stay,re-bleeding rates,or the need for additional diagnostic or therapeutic interventions were found.Patients requiring blood transfusions(n=27)were more likely to be female(P=0.016)and diabetics(P=0.015).Fourteen patients re-bled at a median of 2 days after index colonoscopy.Those with hemodynamic instability were more likely to re-bleed[HR 3.8(CI 1.06–13.7)],undergo angiography[HR 9.8(CI 1.8–54.1)],require surgery[HR 13.5(CI 3.2–56.5)],and had an increased length of hospital stay[HR 1.1(1.05–1.2)].Conclusion:The use of urgent colonoscopy,as an initial approach to investigate acute LGIB,did not result in significant differences in length of ICU stay,re-bleeding rates,the need for additional diagnostic or therapeutic interventions,or 30-day mortality compared with elective colonoscopy.In a pre-specified subgroup analysis,patients with hemodynamic instability were more likely to re-bleed after index colonoscopy,to require additional interventions(angiography or surgery)and had increased length of hospital stay. | Mazen Albeldawi Duc Ha Paresh Mehta Rocio Lopez Sunguk Jang Madhusudhan R.Sanaka John J.Vargo | 2014 | Gastroenterology Report2014，2，4： | 1 |
| 6 | Characterization of Ba- cillus probiotics available for human use显示文摘 | Duc le H Hong HA Barbosa TM | 2004 | Appl Environ Microbiol2004，70，4： | 1 |
| 7 | Per- formance evaluation and comparison of different Ad Hoc rou- ting protocols 显示文摘 | Ha Duyen Trnng Watit Benjapolakul Phan Minh Duc | 2007 | Computer Communications2007，30，11： | 1 |
| 8 | Characteriztttion of Bacillusp pro- biotics available for human use显示文摘 | Duc LH Hong HA Barbosa TM | 2004 | Applied and Environmental Microbi- ol2004，70，4： | 1 |
| 9 | Germination of the spore in the gastrointestinal tract provides a novel route for heterologous antigen delivery 显示文摘 | Duc le H Hong HA Cutting SM | 2003 | Vaccine2003，21，2930： | 1 |
| 10 | Germination of the spore in the gastrointestinal tract provides a novel route for heterologous antigen presentation 显示文摘 | Duc LH Hong HA Cutting SM | 2003 | Vaccine2003，21，： | 1 |
| 11 | Toward sustainable energy usage in the power generation and construction sectors--a case study of Australia显示文摘 | Azzi M Duc H Ha Q P | 2015 | Automation in Construction2015，，59： | 1 |
| 12 | Characterization of Bacillus probiotics availiable for human use 显示文摘 | Duc LH Hong HA Barbosa TM Henriques AO Cutting SM | 2004 | Appl Environ Microbiol2004，70，： | 1 |
| 13 | Bacterial spores as vac- cine vehicles显示文摘 | Duc le H Hong HA Fairweather N | 2003 | Infect Immun2003，71，5： | 1 |
| 14 | High frequency oscillatory ventilation in the management of a high output bronchopleural fistula:a case report显示文摘 | Duc V Ha MD David Johnson MD | | 0，，01： | 1 |
| 15 | Association of impaired heart rate recovery with cardiopulmonary complications after lung cancer resection surgery显示文摘 | Duc Ha Humberto Choi Katrina Zell | 2015 | J Thorac Cardiovasc Surg2015，149，4： | 1 |
| 16 | Germination of the spore in the gastrointestinal tract provides a novel route for heterologous antigen delivery显示文摘 | Duc le H Hong HA Cutting SM | 2003 | Vaccine2003，21，2730： | 1 |
| 17 | Contamination by Selected Organochlorine Pesticides (OCPs) in Surface Soils in Hanoi, Vietnam显示文摘 | Vu Duc Toan Vu Duc Thao Jürg Walder Hans-Rudolf Schmutz Cao The Ha | 2007 | Bulletin of Environmental Contamination and Toxicology (-)2007，，3： | 1 |
| 18 | Association of Impaired Heart Rate Recovery with Cardiopulmonary Complications after Lung Cancer Resection Surgery显示文摘 | Duc Ha Humberto Choi Katrina Zell Daniel P. Raymond Kevin Stephans Xiao-Feng Wang Gregory Videtic Kevin McCarthy Omar A. Minai Peter J. Mazzone | 2014 | The Journal of Thoracic and Cardiovascular Surgery2014，，： | 1 |
| 19 | The use of bacterial spore formers as probiotics显示文摘 | HONG HA DUC LH CUTTING SM | 2005 | FEMS Merobioi Rev2005，29，4： | 1 |
| 20 | Bacterial spores as vaccine vehicles显示文摘 | Duc IH Hong HA Fairweather N | | 0，，05： | 1 |
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