This work focuses on the reinforcement of polyoxymethylene (POM) by nanosilica particles (NS) in ... more This work focuses on the reinforcement of polyoxymethylene (POM) by nanosilica particles (NS) in order to increase flexural strength and hardness of the POM matrix. Thermo - mechanical properties of the POM/NS nanocomposite were investigated by using dynamic mechanical thermal analysis (DMTA).
Consistent evidence indicates that cervical and breast cancer screening rates are low among socio... more Consistent evidence indicates that cervical and breast cancer screening rates are low among socioeconomically deprived women. This study aimed to assess trends in cervical and breast cancer screening rates and to analyze socioeconomic inequalities among Korean women from 2005 to 2015. Data from the Korean National Cancer Screening Survey, an annual nationwide cross-sectional survey, were utilized. A total of 19910 women were finally included for analysis. Inequalities in education and household income status were estimated by slope index of inequality (SII) and relative index of inequality (RII), along with calculation of annual percent changes (APCs), to show trends in cancer screening rates. Cervical and breast cancer screening rates increased from 54.8% in 2005 to 65.6% in 2015 and from 37.6% in 2005 to 61.2% in 2015, respectively. APCs in breast cancer screening rates were significant among women with higher levels of household income and education status. Inequalities by househ...
This study aimed to investigate socioeconomic inequalities in stomach cancer screening in Korea a... more This study aimed to investigate socioeconomic inequalities in stomach cancer screening in Korea and trends therein across income and education groups. Data from the Korean National Cancer Screening Survey, a nationwide cross-sectional survey, were utilized. A total of 28913 men and women aged 40 to 74 years were included for analysis. Prior experience with stomach cancer screening was defined as having undergone either an endoscopy or gastrointestinal series within the past two years. The slope index of inequality (SII) and relative index of inequality (RII) were evaluated to check inequalities. Stomach cancer screening rates increased from 40.0% in 2005 to 74.8% in 2015, with an annual percent change of 5.8% [95% confidence interval (CI) 4.2 to 7.5]. Increases in stomach cancer screening rates were observed for all age, education, and household income groups. Inequalities in stomach cancer screening were noted among individuals of differing levels of education, with a pooled SII es...
This paper presents the tensile, thermal, dielectric and morphological properties of composites b... more This paper presents the tensile, thermal, dielectric and morphological properties of composites based on polyoxymethylene (POM) and nanosilica (NS) prepared by melt mixing method at 190 °C. Based on the torque readings, the processing of POM/NS composites were found to be easier in comparison to only POM. The FT-IR spectra analysis of the POM/NS nanocomposites showed the presence of peak at approximately 910 cm-1, attributed to the Si-O and C-O groups in NS and POM on the POM/NS nanocomposite. The absorption at these peaks increased on gradually increasing the content of NS. Tensile property testing (tensile strength, elongation at break, and Young's modulus) indicated that the tensile strength of POM/NS nanocomposites increases as the NS content increases from 0.5 wt.% to 1.5 wt.%, and sharply dropped when the NS content was more than 2 wt.%. A similar trend was observed for Young's modulus and elongation at break of the nanocomposites. The DSC analysis of the nanocomposite...
This paper presents the results of zeta potential, water contact angle, atomic force microscopy i... more This paper presents the results of zeta potential, water contact angle, atomic force microscopy image, in vitro solubility, and content of heavy metals in polylactic acid (PLA)/chitosan (CS) nanoparticles loading nifedipine. In addition, the In Vivo test of the PLA/CS nanoparticles loading nifedipine in the mice is also one of highlights of this work. The Zeta potential result shows that the charged surface of the PLA/CS nanoparticles loading nifedipine is neutral, negative or complex depending on nifedipine content. Nifedipine plays a role in increase of hydrophobic property, swelling degree and regular surface as well as decrease of surface rough of the nanoparticles. The PLA/CS/nifedipine nanoparticles are dissolved in the solutions with pH 6.8, pH 4.5 and pH 1.2. The In Vivo test of PLA/CS nanoparticles loading nifedipine on mice was evaluated by the change in diastolic pressure, systolic pressure, arterial pressure and heart rate. The obtained results confirm that the PLA/CS na...
With improvement in hospice palliative care services and long-term care, Republic of Korea (herea... more With improvement in hospice palliative care services and long-term care, Republic of Korea (hereafter South Korea) has recorded significant changes in places of death (e.g., hospital, home), especially among older adults. Over the last few decades, the most common places of death in South Korea were hospitals. However, Koreans, especially older adults, reportedly prefer to receive terminal care and eventually die at home. This study was conducted to investigate trends in places of death among older Korean adults and factors associated therewith. Data were obtained from the Korean Death Registration Database maintained by the National Statistical Office. Decedents who died after the age of 65 years from 2001 to 2014 were included in the analysis. For descriptive analysis, proportions of places of death were analyzed and were used to plot graphs for visualizing trends during 13-year period. Logistic regression model was used to evaluate factors associated with places of death (hospita...
Cancer research and treatment : official journal of Korean Cancer Association, Jan 10, 2016
Hospice and palliative care services (HPC) are not commonly utilized in Korea; however, palliativ... more Hospice and palliative care services (HPC) are not commonly utilized in Korea; however, palliative care teams (PCTs) have been found to be effective at addressing the shortcomings in HPC. In this study, we attempted to outline unmet palliative care needs of terminal cancer patients and the potential benefits of PCTs as perceived by doctors in Korea. We surveyed 474 doctors at 10 cancer-related academic conferences from June to November 2014 with a self-report questionnaire to assess their perceptions of end-of-life (EOL) care needs and the expected effects of PCTs on caring for terminal cancer patients. Among those surveyed, 440 respondents who completed the entire questionnaire were analyzed. In all domains, fewer participants reported satisfaction with palliative care services than those reporting needs (P <0.001). The surveyed participants also reported difficulties with a shortage of time for treatment, psychological burden, lack of knowledge regarding hospice care, lengths o...
Named entity recognition (NER) has been extensively studied for the names of genes and gene produ... more Named entity recognition (NER) has been extensively studied for the names of genes and gene products but there are few proposed solutions for phenotypes. Phenotype terms are expected to play a key role in inferring gene function in complex heritable diseases but are intrinsically difficult to analyse due to their complex semantics and scale. In contrast to previous approaches we evaluate state-of-the-art techniques involving the fusion of machine learning on a rich feature set with evidence from extant domain knowledge-sources. The techniques are validated on two gold standard collections including a novel annotated collection of 112 abstracts derived from a systematic search of the Online Mendelian Inheritance of Man database for auto-immune diseases. Encouragingly the hybrid model outperforms a HMM, a CRF and a pure knowledge-based method to achieve an F1 of 77.07. Disagreement analysis points to further improvements on this emerging NE task. The annotated corpus and guidelines ar...
Significance: Vietnamese-Americans are less likely to eat 5 servings of fruits and vegetables (F&... more Significance: Vietnamese-Americans are less likely to eat 5 servings of fruits and vegetables (F&V) and to be physically active than non-Hispanic whites. Purpose: Increase in intake of F&V and physical activities (PA) in Vietnamese-Americans. Methods: Using a clustered randomized controlled design, Lay Health Workers (LHWs) recruited participants aged 50-74 years for an intervention (n=155) or control arm (n=158). LHWs delivered 2 educational sessions about healthy eating and PA to the intervention arm participants; the control arm attended sessions about colorectal cancer screening. Effectiveness was measured using pre-intervention and post-intervention surveys. Outcomes were: 1) knowing the recommended number of daily servings of F&V, 2) knowing the recommended number of weekly minutes of PA, 3) eating ≥5 servings of F&V daily, and 4) being moderately/vigorously physically active for ≥150 minutes weekly. Results: Participants in the intervention group showed significantly greater ...
OBJECT The impact of transsphenoidal surgery for nonfunctional pituitary adenomas (NFAs) on preop... more OBJECT The impact of transsphenoidal surgery for nonfunctional pituitary adenomas (NFAs) on preoperative hypopituitarism relative to the incidence of new postoperative endocrine deficits remains unclear. The authors investigated rates of hypopituitarism resolution and development after transsphenoidal surgery. METHODS Over a 5-year period, 305 transsphenoidal surgeries for NFAs performed at The California Center for Pituitary Disorders were retrospectively reviewed. RESULTS Patients with preoperative endocrine deficits (n = 153, 50%) were significantly older (mean age 60 vs 54 years; p = 0.004), more frequently male (65% vs 44%; p = 0.0005), and had larger adenomas (2.4 cm vs 2.1 cm; p = 0.02) than patients without preoperative deficits (n = 152, 50%). Of patients with preoperative endocrine deficits, 53% exhibited symptoms. Preoperative deficit rates were 26% for the thyroid axis; 20% and 16% for the male and female reproductive axes, respectively; 13% for the adrenocorticotropic h...
OBJECT.: While transsphenoidal surgery is associated with low morbidity, the degree to which morb... more OBJECT.: While transsphenoidal surgery is associated with low morbidity, the degree to which morbidity increases after reoperation remains unclear. The authors determined the morbidity associated with repeat versus initial transsphenoidal surgery after 1015 consecutive operations. The authors conducted a 5-year retrospective review of the first 916 patients undergoing transsphenoidal surgery at their institution after a pituitary center of expertise was established, and they analyzed morbidities. The authors analyzed 907 initial and 108 repeat transsphenoidal surgeries performed in 916 patients (9 initial surgeries performed outside the authors' center were excluded). The most common diagnoses were endocrine inactive (30%) or active (36%) adenomas, Rathke's cleft cysts (10%), and craniopharyngioma (3%). Morbidity of initial surgery versus reoperation included diabetes insipidus ([DI] 16% vs 26%; p = 0.03), postoperative hyponatremia (20% vs 16%; p = 0.3), new postoperative h...
2011 International Conference on Asian Language Processing, 2011
Page 1. An Integrated Approach Using Conditional Random Fields for Named Entity Recognition and P... more Page 1. An Integrated Approach Using Conditional Random Fields for Named Entity Recognition and Person Property Extraction in Vietnamese Text Hoang-Quynh Le, Mai-Vu Tran, Nhat-Nam Bui, Nguyen-Cuong Phan, Quang ...
2010 International Conference on Asian Language Processing, 2010
Page 1. User Interest Analysis With Hidden Topic In News Recommendation System Mai-Vu Tran Inform... more Page 1. User Interest Analysis With Hidden Topic In News Recommendation System Mai-Vu Tran Information Systems Dept., University of Engineer and Technology, VNU Hanoi, Vietnam Email: vutranmai@gmail.com Xuan-Tu ...
2011 International Conference on Asian Language Processing, 2011
... For example, with the Vietnamese paragraph: “Bách Dương tên thật là Quách Định Sanh, sinh năm... more ... For example, with the Vietnamese paragraph: “Bách Dương tên thật là Quách Định Sanh, sinh năm 1920 tại Hà Nam, Trung Quốc. ... From the above example, we can produce pairs (“Bách Dương”, “Quách Đình Sanh”), (“Bách Dương”, “Ông”), (“Bách Dương”, “nhà văn”), etc. ...
This work focuses on the reinforcement of polyoxymethylene (POM) by nanosilica particles (NS) in ... more This work focuses on the reinforcement of polyoxymethylene (POM) by nanosilica particles (NS) in order to increase flexural strength and hardness of the POM matrix. Thermo - mechanical properties of the POM/NS nanocomposite were investigated by using dynamic mechanical thermal analysis (DMTA).
Consistent evidence indicates that cervical and breast cancer screening rates are low among socio... more Consistent evidence indicates that cervical and breast cancer screening rates are low among socioeconomically deprived women. This study aimed to assess trends in cervical and breast cancer screening rates and to analyze socioeconomic inequalities among Korean women from 2005 to 2015. Data from the Korean National Cancer Screening Survey, an annual nationwide cross-sectional survey, were utilized. A total of 19910 women were finally included for analysis. Inequalities in education and household income status were estimated by slope index of inequality (SII) and relative index of inequality (RII), along with calculation of annual percent changes (APCs), to show trends in cancer screening rates. Cervical and breast cancer screening rates increased from 54.8% in 2005 to 65.6% in 2015 and from 37.6% in 2005 to 61.2% in 2015, respectively. APCs in breast cancer screening rates were significant among women with higher levels of household income and education status. Inequalities by househ...
This study aimed to investigate socioeconomic inequalities in stomach cancer screening in Korea a... more This study aimed to investigate socioeconomic inequalities in stomach cancer screening in Korea and trends therein across income and education groups. Data from the Korean National Cancer Screening Survey, a nationwide cross-sectional survey, were utilized. A total of 28913 men and women aged 40 to 74 years were included for analysis. Prior experience with stomach cancer screening was defined as having undergone either an endoscopy or gastrointestinal series within the past two years. The slope index of inequality (SII) and relative index of inequality (RII) were evaluated to check inequalities. Stomach cancer screening rates increased from 40.0% in 2005 to 74.8% in 2015, with an annual percent change of 5.8% [95% confidence interval (CI) 4.2 to 7.5]. Increases in stomach cancer screening rates were observed for all age, education, and household income groups. Inequalities in stomach cancer screening were noted among individuals of differing levels of education, with a pooled SII es...
This paper presents the tensile, thermal, dielectric and morphological properties of composites b... more This paper presents the tensile, thermal, dielectric and morphological properties of composites based on polyoxymethylene (POM) and nanosilica (NS) prepared by melt mixing method at 190 °C. Based on the torque readings, the processing of POM/NS composites were found to be easier in comparison to only POM. The FT-IR spectra analysis of the POM/NS nanocomposites showed the presence of peak at approximately 910 cm-1, attributed to the Si-O and C-O groups in NS and POM on the POM/NS nanocomposite. The absorption at these peaks increased on gradually increasing the content of NS. Tensile property testing (tensile strength, elongation at break, and Young's modulus) indicated that the tensile strength of POM/NS nanocomposites increases as the NS content increases from 0.5 wt.% to 1.5 wt.%, and sharply dropped when the NS content was more than 2 wt.%. A similar trend was observed for Young's modulus and elongation at break of the nanocomposites. The DSC analysis of the nanocomposite...
This paper presents the results of zeta potential, water contact angle, atomic force microscopy i... more This paper presents the results of zeta potential, water contact angle, atomic force microscopy image, in vitro solubility, and content of heavy metals in polylactic acid (PLA)/chitosan (CS) nanoparticles loading nifedipine. In addition, the In Vivo test of the PLA/CS nanoparticles loading nifedipine in the mice is also one of highlights of this work. The Zeta potential result shows that the charged surface of the PLA/CS nanoparticles loading nifedipine is neutral, negative or complex depending on nifedipine content. Nifedipine plays a role in increase of hydrophobic property, swelling degree and regular surface as well as decrease of surface rough of the nanoparticles. The PLA/CS/nifedipine nanoparticles are dissolved in the solutions with pH 6.8, pH 4.5 and pH 1.2. The In Vivo test of PLA/CS nanoparticles loading nifedipine on mice was evaluated by the change in diastolic pressure, systolic pressure, arterial pressure and heart rate. The obtained results confirm that the PLA/CS na...
With improvement in hospice palliative care services and long-term care, Republic of Korea (herea... more With improvement in hospice palliative care services and long-term care, Republic of Korea (hereafter South Korea) has recorded significant changes in places of death (e.g., hospital, home), especially among older adults. Over the last few decades, the most common places of death in South Korea were hospitals. However, Koreans, especially older adults, reportedly prefer to receive terminal care and eventually die at home. This study was conducted to investigate trends in places of death among older Korean adults and factors associated therewith. Data were obtained from the Korean Death Registration Database maintained by the National Statistical Office. Decedents who died after the age of 65 years from 2001 to 2014 were included in the analysis. For descriptive analysis, proportions of places of death were analyzed and were used to plot graphs for visualizing trends during 13-year period. Logistic regression model was used to evaluate factors associated with places of death (hospita...
Cancer research and treatment : official journal of Korean Cancer Association, Jan 10, 2016
Hospice and palliative care services (HPC) are not commonly utilized in Korea; however, palliativ... more Hospice and palliative care services (HPC) are not commonly utilized in Korea; however, palliative care teams (PCTs) have been found to be effective at addressing the shortcomings in HPC. In this study, we attempted to outline unmet palliative care needs of terminal cancer patients and the potential benefits of PCTs as perceived by doctors in Korea. We surveyed 474 doctors at 10 cancer-related academic conferences from June to November 2014 with a self-report questionnaire to assess their perceptions of end-of-life (EOL) care needs and the expected effects of PCTs on caring for terminal cancer patients. Among those surveyed, 440 respondents who completed the entire questionnaire were analyzed. In all domains, fewer participants reported satisfaction with palliative care services than those reporting needs (P <0.001). The surveyed participants also reported difficulties with a shortage of time for treatment, psychological burden, lack of knowledge regarding hospice care, lengths o...
Named entity recognition (NER) has been extensively studied for the names of genes and gene produ... more Named entity recognition (NER) has been extensively studied for the names of genes and gene products but there are few proposed solutions for phenotypes. Phenotype terms are expected to play a key role in inferring gene function in complex heritable diseases but are intrinsically difficult to analyse due to their complex semantics and scale. In contrast to previous approaches we evaluate state-of-the-art techniques involving the fusion of machine learning on a rich feature set with evidence from extant domain knowledge-sources. The techniques are validated on two gold standard collections including a novel annotated collection of 112 abstracts derived from a systematic search of the Online Mendelian Inheritance of Man database for auto-immune diseases. Encouragingly the hybrid model outperforms a HMM, a CRF and a pure knowledge-based method to achieve an F1 of 77.07. Disagreement analysis points to further improvements on this emerging NE task. The annotated corpus and guidelines ar...
Significance: Vietnamese-Americans are less likely to eat 5 servings of fruits and vegetables (F&... more Significance: Vietnamese-Americans are less likely to eat 5 servings of fruits and vegetables (F&V) and to be physically active than non-Hispanic whites. Purpose: Increase in intake of F&V and physical activities (PA) in Vietnamese-Americans. Methods: Using a clustered randomized controlled design, Lay Health Workers (LHWs) recruited participants aged 50-74 years for an intervention (n=155) or control arm (n=158). LHWs delivered 2 educational sessions about healthy eating and PA to the intervention arm participants; the control arm attended sessions about colorectal cancer screening. Effectiveness was measured using pre-intervention and post-intervention surveys. Outcomes were: 1) knowing the recommended number of daily servings of F&V, 2) knowing the recommended number of weekly minutes of PA, 3) eating ≥5 servings of F&V daily, and 4) being moderately/vigorously physically active for ≥150 minutes weekly. Results: Participants in the intervention group showed significantly greater ...
OBJECT The impact of transsphenoidal surgery for nonfunctional pituitary adenomas (NFAs) on preop... more OBJECT The impact of transsphenoidal surgery for nonfunctional pituitary adenomas (NFAs) on preoperative hypopituitarism relative to the incidence of new postoperative endocrine deficits remains unclear. The authors investigated rates of hypopituitarism resolution and development after transsphenoidal surgery. METHODS Over a 5-year period, 305 transsphenoidal surgeries for NFAs performed at The California Center for Pituitary Disorders were retrospectively reviewed. RESULTS Patients with preoperative endocrine deficits (n = 153, 50%) were significantly older (mean age 60 vs 54 years; p = 0.004), more frequently male (65% vs 44%; p = 0.0005), and had larger adenomas (2.4 cm vs 2.1 cm; p = 0.02) than patients without preoperative deficits (n = 152, 50%). Of patients with preoperative endocrine deficits, 53% exhibited symptoms. Preoperative deficit rates were 26% for the thyroid axis; 20% and 16% for the male and female reproductive axes, respectively; 13% for the adrenocorticotropic h...
OBJECT.: While transsphenoidal surgery is associated with low morbidity, the degree to which morb... more OBJECT.: While transsphenoidal surgery is associated with low morbidity, the degree to which morbidity increases after reoperation remains unclear. The authors determined the morbidity associated with repeat versus initial transsphenoidal surgery after 1015 consecutive operations. The authors conducted a 5-year retrospective review of the first 916 patients undergoing transsphenoidal surgery at their institution after a pituitary center of expertise was established, and they analyzed morbidities. The authors analyzed 907 initial and 108 repeat transsphenoidal surgeries performed in 916 patients (9 initial surgeries performed outside the authors' center were excluded). The most common diagnoses were endocrine inactive (30%) or active (36%) adenomas, Rathke's cleft cysts (10%), and craniopharyngioma (3%). Morbidity of initial surgery versus reoperation included diabetes insipidus ([DI] 16% vs 26%; p = 0.03), postoperative hyponatremia (20% vs 16%; p = 0.3), new postoperative h...
2011 International Conference on Asian Language Processing, 2011
Page 1. An Integrated Approach Using Conditional Random Fields for Named Entity Recognition and P... more Page 1. An Integrated Approach Using Conditional Random Fields for Named Entity Recognition and Person Property Extraction in Vietnamese Text Hoang-Quynh Le, Mai-Vu Tran, Nhat-Nam Bui, Nguyen-Cuong Phan, Quang ...
2010 International Conference on Asian Language Processing, 2010
Page 1. User Interest Analysis With Hidden Topic In News Recommendation System Mai-Vu Tran Inform... more Page 1. User Interest Analysis With Hidden Topic In News Recommendation System Mai-Vu Tran Information Systems Dept., University of Engineer and Technology, VNU Hanoi, Vietnam Email: vutranmai@gmail.com Xuan-Tu ...
2011 International Conference on Asian Language Processing, 2011
... For example, with the Vietnamese paragraph: “Bách Dương tên thật là Quách Định Sanh, sinh năm... more ... For example, with the Vietnamese paragraph: “Bách Dương tên thật là Quách Định Sanh, sinh năm 1920 tại Hà Nam, Trung Quốc. ... From the above example, we can produce pairs (“Bách Dương”, “Quách Đình Sanh”), (“Bách Dương”, “Ông”), (“Bách Dương”, “nhà văn”), etc. ...
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