K59 Nguyen Phuong Anh - Academia.edu (original) (raw)

Papers by K59 Nguyen Phuong Anh

Based on a new theory of causality [1] and its development to the theory of the Universe [2], we ... more Based on a new theory of causality [1] and its development to the theory of the Universe [2], we show, in this paper, new ideas for building a theory of everything.

2005 IEEE International Conference on Personal Wireless Communications, 2005. ICPWC 2005.

This paper presents an overview of several popular sniffers that are available in the Internet, f... more This paper presents an overview of several popular sniffers that are available in the Internet, from simple and compact tools to more complex and multi-functional ones. We describe important wireless sniffing tools such as Wellenreiter, Kismet, Ethereal, AirTraf and AirSnort. We discuss their functions along with their strengths and weaknesses. We describe how they can be used for different purposes such as hacking, exploiting security holes, and their usage characterization of wireless networks. Through a detailed experimental study conducted at the National University of Singapore during a four months period in 2004, we observe several interesting properties.

Tonan ajia kenkyu, 2003

Focusing on the Vietnamese attitude towards cross-cultural borrowings and cultural adaptation, th... more Focusing on the Vietnamese attitude towards cross-cultural borrowings and cultural adaptation, this paper argues that, in spite of the age-old Sino-Vietnamese cultural alignment, the Vietnamese governing class had always been favourable to multi-centred technological transfer, contending at the same time that their own court culture would be less innovative than the Chinese Confucian tradition. In particular, the adoption of Western military technology, military strategy, and shipbuilding techniques from the very beginning of European expansion in the region belies the longstanding claims that the Vietnamese bureaucracy was blinded by Confucian dogmas to the real potential of Western technology in state-building and national defence. In fact, expressing strong interests in and understandings of Western material life in the early nineteenth century even as the Western threat was looming, the Vietnamese leadership was far from being introverted and anti-modernist, contrarily to the common belief.

Vietnam Journal of Mechanics, 2000

The aim of the paper is to present a control law for feedback active controlled structures in whi... more The aim of the paper is to present a control law for feedback active controlled structures in which a control algorithm is proposed to identify the external excitation with a time delay. The time duration in which the external excitation acts on the structure is devised into subintervals. In each subinterval the external excitation is identified and is then selected with the opposite sign as the control force for the next subinterval. The realization of the identification control algorithm in the practical application mainly depends on the computing capacity of the involved computer. and requires an investigation with respect to its robustness and stabilization.

Vietnam Journal of Biotechnology, 2021

Collagen type VI-related disorders consist of Ullrich congenital muscular dystrophies (UCMD) and ... more Collagen type VI-related disorders consist of Ullrich congenital muscular dystrophies (UCMD) and Bethlem myopathy, in which these entities are at two opposite extremes of the phenotype continuum. Clinical characteristics include proximal joint contracture, distal joint hyperlaxity, generalized muscle weakness, normal cognitive function, and pulmonary insufficiency. Affected individuals have trouble standing up and walking independently. Mutations in 3 genes (COL6A1, COL6A2, and COL6A3) are associated with decreasing collagen-VI production and disrupting the microfibrillar network between skeletal muscles. In the present study, using whole-exome sequencing (WES), a pathogenic variant in the COL6A1 gene (NM_001848, c.868G>C, p.G290R) was detected in a Vietnamese family with UCMD patients. Segregation analysis by Sanger sequencing confirmed that this mutation was inherited in an autosomal dominant pattern. This study expands the breadth of congenital muscular dystrophies research la...

Pseudoroegneria is a genus in Triticeae (Poaceae) consisting of diploid, auto-and allopolyploid s... more Pseudoroegneria is a genus in Triticeae (Poaceae) consisting of diploid, auto-and allopolyploid species that are built around St genome. Total genomic DNA of St genome is used in molecular assays for fundamental and applied studies. It is important to verify whether an accession belongs to the species shown in the catalogue or label. The study of plant material from Germplasm Resources Information Network (GRIN) have shown that the P. spicata accession PI 635993 is a diploid (2n=14), the P. spicata accession PI 537371 is a tetraploid (2n=28), the P. strigosa accessions PI 639805 and PI 595164 are hexaploids (2n=42). Genomic in situ hybridization revealed that each of the polyploids PI 537371 and PI 639805 possesses one St genome and one or two unidentified genomes, respectively.

Tạp chí Khoa học và Công nghệ biển, 2021

Fish bone by-products are considered as abundant source of hydroxyapatite (HAp). The preparation ... more Fish bone by-products are considered as abundant source of hydroxyapatite (HAp). The preparation of HAp from fish bones not only contributes to improving the value of by-products but also minimizes negative impacts on the environment. In this study, nanohydroxyapatite was successfully obtained from Lates calcarifer fish bone purchased from seafood export company in Khanh Hoa province. Fish bones were under alkali treatment and then heated at 600oC within different time intervals of 1, 2 and 4 hours. Analysis of XRD and SEM showed that the calcium formed was completely single-phase and possessed an average size of 50–64 nm depending on the calcination time. The results of the Ca/P molar ratio from 1.839 to 1.847 prove that the nano-HAp powders are B-type biological hydroxyapatites, which has been confirmed by FTIR spectrum. In addition, the content of heavy metals such as As, Pb, Hg, Cd is detected within safety limits. These properties allow nano-HAp powders to be applied in food an...

Tạp chí Khoa học và Công nghệ biển, 2021

The fan-bellied leatherjacket skin was treated to extract collagen by chemical method. The non-co... more The fan-bellied leatherjacket skin was treated to extract collagen by chemical method. The non-collagenous substances and the pigment in the skin were removed with NaOH and H2O2, respectively. Collagen was extracted with acetic acid. The treatment and extraction conditions were optimized by response surface methodology. The concentrations, skin/solution ratios (g/ml) and times were surveyed. The optimum conditions to remove the non-collagenous substances were as follows: the concentration of NaOH at 0.15M, the ratio (g/ml) at 1/13.9, time at 56.9 hours. Using H2O2 with the concentration at6%, the skin/solution ratio (g/ml) at 1/2, time at 10 minutes were suitable values for skin pigmentation removal. For collagen extraction, the concentration of acetic acid at 0.53M, skin/solution ratio at 1/9.6 g/ml and time in 59.6 hours were optimal.

Tạp chí Khoa học và Công nghệ biển, 2019

The Oceanographic Museum offers interesting exhibits of several marine lives for tourist sightsee... more The Oceanographic Museum offers interesting exhibits of several marine lives for tourist sightseeing and entertainment. These sea water ornamental fish are all caught in the wild. However, its health can be affected by cyanide poisoning during human fishing. Depending on the level of cyanide poisoning, fish can die after one and two weeks that caused economic damages for the museum. The present study is concerned with results of cyanide detoxification by using direct injection into cinnamon clownfish or soak of hydroxocobalamin, sodium nitrite and sodium thiosulfate with the aim of improving the health, survival and life time for fish, contributing to increasing economic efficiency for the Oceanographic Museum.

VNU Journal of Science: Education Research, 2019

Computerized Adaptive Testing - CAT is a form of assessment test which requires fewer test questi... more Computerized Adaptive Testing - CAT is a form of assessment test which requires fewer test questions to arrive at precise measurements of examinees' ability. One of the core technical components in building a CAT is mathematical algorithms which estimate examinee's ability and select the most appropriate test questions for those estimates. Those mathematical algorithms serve as a locomotive in operating the system of adaptive multiple-choice questions on computers. Our research aims to develop essential mathematical algorithms to a computerised system of adaptive multiple-choice tests. We also build a question bank of 500 multiple-choice questions standardised by IRT theory with the difficulty level follows the normal distribution satisfying Kolmogorov-Smirnov test, to measure the mathematical ability of students in grade 10. The initial outcome of our experiment of the question bank shows: the question bank satisfies the requirements from a psychometric model and the const...

Tạp chí Khoa học và Công nghệ biển, 2019

Tetrodotoxins in salted and fermented ovaries with rice bran of a puffer fish Lagocephalus inermi... more Tetrodotoxins in salted and fermented ovaries with rice bran of a puffer fish Lagocephalus inermis (Temminck & Schlegel, 1850) during five months were determined by high-performance liquid chromatography with fluorometric detector (HPLC- FLD). The analysed results showed that the original ovaries contained only tetrodotoxin with content of 7.59 µg/g fresh weight. 4,9-Anhydrotetrodotoxin - an isomer which is less toxic than tetrodotoxin has been found in all ovary samples since the second month. Tetrodotoxin in the ovaries disappeared in the 4th month of the experiment. In addition, 4,9-anhydrotetrodotoxin level in ovaries increased during fermentation. The present study contributes to clarifying the chemical mechanism of decreasing tetrodotoxin content in fermented ovary of puffer fish.

Health care for women international, 2018

Women made up more than half of the Vietnam's population (nearly 47 million or 50.7% of the total... more Women made up more than half of the Vietnam's population (nearly 47 million or 50.7% of the total population in 2016). The number of female employees in Vietnam in 2016 was 26.4 million accounting for 48.4% of the country's workforce (Vietnam General Statistics Office, 2017). Women's health and health care in Vietnam have been significantly improved over time. Maternal mortality in Vietnam has decreased from 233 per 100,000 live births in 1990 to 69 per 100,000 live births in 2009, and then again to approximately 50 per 100,000 live births in 2015 (Inter-Agency Group, 2015). Life expectancy at birth of Vietnamese women reached 76.1 years in 2016, higher than that of men (70.8 years) (Vietnam General Statistics Office, 2017). The improvement in health indicators for women has been impressive, but there still exist inequities in women's health and health care in Vietnam (United Nations Development Programme). To tackle the inequity problems, a deep understanding of the current situation of women's health and health care in Vietnam is needed by policy makers, social and health practitioners as well as by the public. The findings from this set of authors provide further insights into today's women and health care issues in Vietnam. Chuong et al., based on the analyses of data from the Vietnam Multiple Indicator Cluster Survey 2000, 2006, 2011, and 2014, found that the coverage of antenatal and skilled birth attendance both increased over time in Vietnam. However, improvements in antenatal care and skilled birth attendance in Vietnam have been uneven across different segments of the population, and the degrees of inequity are likely to increase (Chuong et al., 2018). Inequity in health service utilization was also discovered from a study by Hanh et al., which showed that about 28.2% of the migrants having sex had not used any contraceptive method. Contraceptive use was significantly associated with age, education, private companies, and income (Hanh, Tuan, Anh, Ha, & Anh, 2018). Many women in Vietnam are still suffering from communicable diseases, especially reproductive tract problems and HIV/AIDS. Le et al. revealed that about

Vaccine, Jan 22, 2018

In some settings, rotavirus vaccines have been associated with a low-level risk of intussusceptio... more In some settings, rotavirus vaccines have been associated with a low-level risk of intussusception, the most common cause of bowel obstruction in infants. As Vietnam prepares to introduce rotavirus vaccine into the national immunization program, we sought to better characterize the epidemiology of recurrent intussusception. We enrolled children <2 years of age who were hospitalized for intussusception retrospectively from January 2013 through December 2014 and prospectively from January 2015 through December 2016 at 2 hospitals in Vietnam. We enrolled 2477 children. Nearly all children were successfully treated by enema with low surgery rate (1%). We found 10% of children (n = 254) experienced at least once recurrence (range: 1-6) and 57% of first recurrences happened within the first 12 weeks after treatment of the first episode. The median age at first intussusception was 13 months for children without a recurrent episode and 10 months for children with a recurrence. The sympto...

The New England journal of medicine, Jan 18, 2018

Active case finding is a top priority for the global control of tuberculosis, but robust evidence... more Active case finding is a top priority for the global control of tuberculosis, but robust evidence for its effectiveness in high-prevalence settings is lacking. We sought to evaluate the effectiveness of household-contact investigation, as compared with standard, passive measures alone, in Vietnam. We performed a cluster-randomized, controlled trial at clinics in 70 districts (local government areas with an average population of approximately 500,000 in urban areas and 100,000 in rural areas) in eight provinces of Vietnam. Health workers at each district clinic or hospital were assigned to perform either household-contact intervention plus standard passive case finding (intervention group) or passive case finding alone (control group). In the intervention districts, household contacts of patients with positive results for tuberculosis on sputum smear microscopy (smear-positive tuberculosis) were invited for clinical assessment and chest radiography at baseline and at 6, 12, and 24 mo...

ChemInform, 2003

ABSTRACT For Abstract see ChemInform Abstract in Full Text.

International Journal of Advanced Science and Technology, 2016

In recent year, main research direction in LED technology is improving lighting performance of wh... more In recent year, main research direction in LED technology is improving lighting performance of white LED (CRI and lumen output). In this paper, effect of YAG:CE particle size on lighting performance of Multi-chip White LED (MCW-LEDs) is considered like an innovative method for improving their lighting performance. Main approaches of this work are: 1) using MCW-LEDs with high color temperature (CCT) near 8500 K, 2) investigating and demonstrating the effect of YAG:CE particle size on lighting performance of Multi-chip White LED with CCT 8500 K. Firstly, the phosphor layer mechanism of real MCW-LEDs with flat silicone coating is simulated by using LightTools 8.1.0 program. Then by varying YAG:CE particle size, ∆CCT, CRI and lumen output of MCW-LEDs were calculated and analyzed. The simulation and experimental results showed that ∆CCT, CRI and lumen output of MCW-LEDs of 8500 K MCW-LEDs are significantly influenced by varying YAG:CE particle size. These results can be a prospective ideal for future improving white LED manufacture.

Investigacion Y Ciencia, 2000

Proceedings of the 21st International Conference on Pattern Recognition, 2012

Segmenting objects from color images to obtain useful information is a challenging research area ... more Segmenting objects from color images to obtain useful information is a challenging research area recently. In this paper, a novel algorithm by combining a saliency map with an extension of a geometric active contour model is proposed to automatically segment the object of interest. The saliency map is first generated from the input image by a histogram based contrast method. The most salient regions are then detected as dominant parts of the object. After that, a contour is initialized using salient regions determined. Finally, by applying a geometric active contour model, the contour starts evolving iteratively to segment object boundaries. Experimental results attained on various natural scene images have shown that our proposed method is able to not only replace manual initialized contour and improve the accuracy, noise robustness of segmentation but converge to an optimal solution earlier than recent active contour models as well.

Vietnam Social Sciences, 2010

J. for International Business and Entrepreneurship Development, 2016

Based on a new theory of causality [1] and its development to the theory of the Universe [2], we ... more Based on a new theory of causality [1] and its development to the theory of the Universe [2], we show, in this paper, new ideas for building a theory of everything.

2005 IEEE International Conference on Personal Wireless Communications, 2005. ICPWC 2005.

This paper presents an overview of several popular sniffers that are available in the Internet, f... more This paper presents an overview of several popular sniffers that are available in the Internet, from simple and compact tools to more complex and multi-functional ones. We describe important wireless sniffing tools such as Wellenreiter, Kismet, Ethereal, AirTraf and AirSnort. We discuss their functions along with their strengths and weaknesses. We describe how they can be used for different purposes such as hacking, exploiting security holes, and their usage characterization of wireless networks. Through a detailed experimental study conducted at the National University of Singapore during a four months period in 2004, we observe several interesting properties.

Tonan ajia kenkyu, 2003

Focusing on the Vietnamese attitude towards cross-cultural borrowings and cultural adaptation, th... more Focusing on the Vietnamese attitude towards cross-cultural borrowings and cultural adaptation, this paper argues that, in spite of the age-old Sino-Vietnamese cultural alignment, the Vietnamese governing class had always been favourable to multi-centred technological transfer, contending at the same time that their own court culture would be less innovative than the Chinese Confucian tradition. In particular, the adoption of Western military technology, military strategy, and shipbuilding techniques from the very beginning of European expansion in the region belies the longstanding claims that the Vietnamese bureaucracy was blinded by Confucian dogmas to the real potential of Western technology in state-building and national defence. In fact, expressing strong interests in and understandings of Western material life in the early nineteenth century even as the Western threat was looming, the Vietnamese leadership was far from being introverted and anti-modernist, contrarily to the common belief.

Vietnam Journal of Mechanics, 2000

The aim of the paper is to present a control law for feedback active controlled structures in whi... more The aim of the paper is to present a control law for feedback active controlled structures in which a control algorithm is proposed to identify the external excitation with a time delay. The time duration in which the external excitation acts on the structure is devised into subintervals. In each subinterval the external excitation is identified and is then selected with the opposite sign as the control force for the next subinterval. The realization of the identification control algorithm in the practical application mainly depends on the computing capacity of the involved computer. and requires an investigation with respect to its robustness and stabilization.

Vietnam Journal of Biotechnology, 2021

Collagen type VI-related disorders consist of Ullrich congenital muscular dystrophies (UCMD) and ... more Collagen type VI-related disorders consist of Ullrich congenital muscular dystrophies (UCMD) and Bethlem myopathy, in which these entities are at two opposite extremes of the phenotype continuum. Clinical characteristics include proximal joint contracture, distal joint hyperlaxity, generalized muscle weakness, normal cognitive function, and pulmonary insufficiency. Affected individuals have trouble standing up and walking independently. Mutations in 3 genes (COL6A1, COL6A2, and COL6A3) are associated with decreasing collagen-VI production and disrupting the microfibrillar network between skeletal muscles. In the present study, using whole-exome sequencing (WES), a pathogenic variant in the COL6A1 gene (NM_001848, c.868G>C, p.G290R) was detected in a Vietnamese family with UCMD patients. Segregation analysis by Sanger sequencing confirmed that this mutation was inherited in an autosomal dominant pattern. This study expands the breadth of congenital muscular dystrophies research la...

Pseudoroegneria is a genus in Triticeae (Poaceae) consisting of diploid, auto-and allopolyploid s... more Pseudoroegneria is a genus in Triticeae (Poaceae) consisting of diploid, auto-and allopolyploid species that are built around St genome. Total genomic DNA of St genome is used in molecular assays for fundamental and applied studies. It is important to verify whether an accession belongs to the species shown in the catalogue or label. The study of plant material from Germplasm Resources Information Network (GRIN) have shown that the P. spicata accession PI 635993 is a diploid (2n=14), the P. spicata accession PI 537371 is a tetraploid (2n=28), the P. strigosa accessions PI 639805 and PI 595164 are hexaploids (2n=42). Genomic in situ hybridization revealed that each of the polyploids PI 537371 and PI 639805 possesses one St genome and one or two unidentified genomes, respectively.

Tạp chí Khoa học và Công nghệ biển, 2021

Fish bone by-products are considered as abundant source of hydroxyapatite (HAp). The preparation ... more Fish bone by-products are considered as abundant source of hydroxyapatite (HAp). The preparation of HAp from fish bones not only contributes to improving the value of by-products but also minimizes negative impacts on the environment. In this study, nanohydroxyapatite was successfully obtained from Lates calcarifer fish bone purchased from seafood export company in Khanh Hoa province. Fish bones were under alkali treatment and then heated at 600oC within different time intervals of 1, 2 and 4 hours. Analysis of XRD and SEM showed that the calcium formed was completely single-phase and possessed an average size of 50–64 nm depending on the calcination time. The results of the Ca/P molar ratio from 1.839 to 1.847 prove that the nano-HAp powders are B-type biological hydroxyapatites, which has been confirmed by FTIR spectrum. In addition, the content of heavy metals such as As, Pb, Hg, Cd is detected within safety limits. These properties allow nano-HAp powders to be applied in food an...

Tạp chí Khoa học và Công nghệ biển, 2021

The fan-bellied leatherjacket skin was treated to extract collagen by chemical method. The non-co... more The fan-bellied leatherjacket skin was treated to extract collagen by chemical method. The non-collagenous substances and the pigment in the skin were removed with NaOH and H2O2, respectively. Collagen was extracted with acetic acid. The treatment and extraction conditions were optimized by response surface methodology. The concentrations, skin/solution ratios (g/ml) and times were surveyed. The optimum conditions to remove the non-collagenous substances were as follows: the concentration of NaOH at 0.15M, the ratio (g/ml) at 1/13.9, time at 56.9 hours. Using H2O2 with the concentration at6%, the skin/solution ratio (g/ml) at 1/2, time at 10 minutes were suitable values for skin pigmentation removal. For collagen extraction, the concentration of acetic acid at 0.53M, skin/solution ratio at 1/9.6 g/ml and time in 59.6 hours were optimal.

Tạp chí Khoa học và Công nghệ biển, 2019

The Oceanographic Museum offers interesting exhibits of several marine lives for tourist sightsee... more The Oceanographic Museum offers interesting exhibits of several marine lives for tourist sightseeing and entertainment. These sea water ornamental fish are all caught in the wild. However, its health can be affected by cyanide poisoning during human fishing. Depending on the level of cyanide poisoning, fish can die after one and two weeks that caused economic damages for the museum. The present study is concerned with results of cyanide detoxification by using direct injection into cinnamon clownfish or soak of hydroxocobalamin, sodium nitrite and sodium thiosulfate with the aim of improving the health, survival and life time for fish, contributing to increasing economic efficiency for the Oceanographic Museum.

VNU Journal of Science: Education Research, 2019

Computerized Adaptive Testing - CAT is a form of assessment test which requires fewer test questi... more Computerized Adaptive Testing - CAT is a form of assessment test which requires fewer test questions to arrive at precise measurements of examinees' ability. One of the core technical components in building a CAT is mathematical algorithms which estimate examinee's ability and select the most appropriate test questions for those estimates. Those mathematical algorithms serve as a locomotive in operating the system of adaptive multiple-choice questions on computers. Our research aims to develop essential mathematical algorithms to a computerised system of adaptive multiple-choice tests. We also build a question bank of 500 multiple-choice questions standardised by IRT theory with the difficulty level follows the normal distribution satisfying Kolmogorov-Smirnov test, to measure the mathematical ability of students in grade 10. The initial outcome of our experiment of the question bank shows: the question bank satisfies the requirements from a psychometric model and the const...

Tạp chí Khoa học và Công nghệ biển, 2019

Tetrodotoxins in salted and fermented ovaries with rice bran of a puffer fish Lagocephalus inermi... more Tetrodotoxins in salted and fermented ovaries with rice bran of a puffer fish Lagocephalus inermis (Temminck & Schlegel, 1850) during five months were determined by high-performance liquid chromatography with fluorometric detector (HPLC- FLD). The analysed results showed that the original ovaries contained only tetrodotoxin with content of 7.59 µg/g fresh weight. 4,9-Anhydrotetrodotoxin - an isomer which is less toxic than tetrodotoxin has been found in all ovary samples since the second month. Tetrodotoxin in the ovaries disappeared in the 4th month of the experiment. In addition, 4,9-anhydrotetrodotoxin level in ovaries increased during fermentation. The present study contributes to clarifying the chemical mechanism of decreasing tetrodotoxin content in fermented ovary of puffer fish.

Health care for women international, 2018

Women made up more than half of the Vietnam's population (nearly 47 million or 50.7% of the total... more Women made up more than half of the Vietnam's population (nearly 47 million or 50.7% of the total population in 2016). The number of female employees in Vietnam in 2016 was 26.4 million accounting for 48.4% of the country's workforce (Vietnam General Statistics Office, 2017). Women's health and health care in Vietnam have been significantly improved over time. Maternal mortality in Vietnam has decreased from 233 per 100,000 live births in 1990 to 69 per 100,000 live births in 2009, and then again to approximately 50 per 100,000 live births in 2015 (Inter-Agency Group, 2015). Life expectancy at birth of Vietnamese women reached 76.1 years in 2016, higher than that of men (70.8 years) (Vietnam General Statistics Office, 2017). The improvement in health indicators for women has been impressive, but there still exist inequities in women's health and health care in Vietnam (United Nations Development Programme). To tackle the inequity problems, a deep understanding of the current situation of women's health and health care in Vietnam is needed by policy makers, social and health practitioners as well as by the public. The findings from this set of authors provide further insights into today's women and health care issues in Vietnam. Chuong et al., based on the analyses of data from the Vietnam Multiple Indicator Cluster Survey 2000, 2006, 2011, and 2014, found that the coverage of antenatal and skilled birth attendance both increased over time in Vietnam. However, improvements in antenatal care and skilled birth attendance in Vietnam have been uneven across different segments of the population, and the degrees of inequity are likely to increase (Chuong et al., 2018). Inequity in health service utilization was also discovered from a study by Hanh et al., which showed that about 28.2% of the migrants having sex had not used any contraceptive method. Contraceptive use was significantly associated with age, education, private companies, and income (Hanh, Tuan, Anh, Ha, & Anh, 2018). Many women in Vietnam are still suffering from communicable diseases, especially reproductive tract problems and HIV/AIDS. Le et al. revealed that about

Vaccine, Jan 22, 2018

In some settings, rotavirus vaccines have been associated with a low-level risk of intussusceptio... more In some settings, rotavirus vaccines have been associated with a low-level risk of intussusception, the most common cause of bowel obstruction in infants. As Vietnam prepares to introduce rotavirus vaccine into the national immunization program, we sought to better characterize the epidemiology of recurrent intussusception. We enrolled children <2 years of age who were hospitalized for intussusception retrospectively from January 2013 through December 2014 and prospectively from January 2015 through December 2016 at 2 hospitals in Vietnam. We enrolled 2477 children. Nearly all children were successfully treated by enema with low surgery rate (1%). We found 10% of children (n = 254) experienced at least once recurrence (range: 1-6) and 57% of first recurrences happened within the first 12 weeks after treatment of the first episode. The median age at first intussusception was 13 months for children without a recurrent episode and 10 months for children with a recurrence. The sympto...

The New England journal of medicine, Jan 18, 2018

Active case finding is a top priority for the global control of tuberculosis, but robust evidence... more Active case finding is a top priority for the global control of tuberculosis, but robust evidence for its effectiveness in high-prevalence settings is lacking. We sought to evaluate the effectiveness of household-contact investigation, as compared with standard, passive measures alone, in Vietnam. We performed a cluster-randomized, controlled trial at clinics in 70 districts (local government areas with an average population of approximately 500,000 in urban areas and 100,000 in rural areas) in eight provinces of Vietnam. Health workers at each district clinic or hospital were assigned to perform either household-contact intervention plus standard passive case finding (intervention group) or passive case finding alone (control group). In the intervention districts, household contacts of patients with positive results for tuberculosis on sputum smear microscopy (smear-positive tuberculosis) were invited for clinical assessment and chest radiography at baseline and at 6, 12, and 24 mo...

ChemInform, 2003

ABSTRACT For Abstract see ChemInform Abstract in Full Text.

International Journal of Advanced Science and Technology, 2016

In recent year, main research direction in LED technology is improving lighting performance of wh... more In recent year, main research direction in LED technology is improving lighting performance of white LED (CRI and lumen output). In this paper, effect of YAG:CE particle size on lighting performance of Multi-chip White LED (MCW-LEDs) is considered like an innovative method for improving their lighting performance. Main approaches of this work are: 1) using MCW-LEDs with high color temperature (CCT) near 8500 K, 2) investigating and demonstrating the effect of YAG:CE particle size on lighting performance of Multi-chip White LED with CCT 8500 K. Firstly, the phosphor layer mechanism of real MCW-LEDs with flat silicone coating is simulated by using LightTools 8.1.0 program. Then by varying YAG:CE particle size, ∆CCT, CRI and lumen output of MCW-LEDs were calculated and analyzed. The simulation and experimental results showed that ∆CCT, CRI and lumen output of MCW-LEDs of 8500 K MCW-LEDs are significantly influenced by varying YAG:CE particle size. These results can be a prospective ideal for future improving white LED manufacture.

Investigacion Y Ciencia, 2000

Proceedings of the 21st International Conference on Pattern Recognition, 2012

Segmenting objects from color images to obtain useful information is a challenging research area ... more Segmenting objects from color images to obtain useful information is a challenging research area recently. In this paper, a novel algorithm by combining a saliency map with an extension of a geometric active contour model is proposed to automatically segment the object of interest. The saliency map is first generated from the input image by a histogram based contrast method. The most salient regions are then detected as dominant parts of the object. After that, a contour is initialized using salient regions determined. Finally, by applying a geometric active contour model, the contour starts evolving iteratively to segment object boundaries. Experimental results attained on various natural scene images have shown that our proposed method is able to not only replace manual initialized contour and improve the accuracy, noise robustness of segmentation but converge to an optimal solution earlier than recent active contour models as well.

Vietnam Social Sciences, 2010

J. for International Business and Entrepreneurship Development, 2016