Perceived Risk of Sharing Other People’s Information on Facebook: The Perspective of Young People in Ho Chi Minh City, Vietnam

Dinh Tien Minh,Tran Ngoc Thuy,Ngo Nguyen Gia Nghi,Nguyen Yen Vy,Nguyen Thi Thanh Lam,Pham Cong Minh KINFORMS 2021 Management Review Vol.16 No.2

In Vietnam, young people are gradually becoming the most accessible objects to social networks. With the development of technology, they usually use online social networks (ONS) as a tool to update information through multimedia content, which may contain other people s information. In different cases, other people s information will be shared and received for different purposes. Therefore, the risk is inevitable and may affect the privacy of individuals whose information is shared, causing turbulence in the community. This study aims to measure impact and find out the factors that influence the willingness of others to share information on social networks in Ho Chi Minh City by examining young people s perceptions that their activities on Facebook may be risky for other people s information. Besides that, the study proposes solutions to avoid possible risks when sharing information with others.

New Synthesis of the Ternary Type Bi2WO6-GO-TiO2 Nanocomposites by the Hydrothermal Method for the Improvement of the Photo-catalytic Effect

Dinh Cung Tien Nguyen,조광연,오원춘 한국공업화학회 2017 공업화학 Vol.28 No.6

A novel material, Bi2WO6-GO-TiO2 composite, was successfully synthesized using a facile hydrothermal method. During the hydrothermal reaction, the loading of Bi2WO6 and TiO2 nanoparticles onto graphene sheets was achieved. The obtained Bi2WO6-GO-TiO2 composite photo-catalysts were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray (EDX) analysis, transmission electron microscopy (TEM), Raman spectroscopy, ultraviolet-visible diffuse reflectance spectroscopy (UV-vis-DRS), and X-ray photoelectron spectroscopy (XPS). The Bi2WO6 nanoparticle showed an irregular dark-square block nanoplate shape, while TiO2 nanoparticles covered the surface of the graphene sheets with a quantum dot size. The degradation of rhodamine B (RhB), methylene blue trihydrate (MB), and reactive black B (RBB) dyes in an aqueous solution with different initial amount of catalysts was observed by UV spectrophotometry after measuring the decrease in the concentration. As a result, the Bi2WO6-GO-TiO2 composite showed good decolorization activity with MB solution under visible light. The Bi2WO6-GO-TiO2 composite is expected to become a new potential material for decolorization activity. Photocatalytic reactions with different photocatalysts were explained by the Langmuir-Hinshelwood model and a band theory.

Highly efficient visible light driven photocatalytic activities of the LaCuS₂-graphene composite-decorated ordered mesoporous silica

Nguyen, Dinh Cung Tien,Woo, Jung-Hun,Youn Cho, Kwang,Jung, Chong-Hun,Oh, Won-Chun Elsevier 2018 Separation and purification technology Vol.205 No.-

<P><B>Abstract</B></P> <P>A combination of mesoporous silica with an LaCuS<SUB>2</SUB>-graphene composite has been prepared by a self-assembly method in support of the CTAB surfactant as the structure creator and basic medium. The characterization was investigated using XRD, SEM, TEM, HR-TEM, EDS, XPS, Raman, and DRS analysis. The pore size of the as-fabricated composite was calculated to be 5.83 nm by the nitrogen adsorption/desorption isotherms. In addition, the photocatalytic properties revealed that the mesoporous SiO<SUB>2</SUB>/LaCuS<SUB>2</SUB>-graphene catalyst presented a good result for the photocatalytic activity of organic dyes and gallic acid under visible light irradiation. Moreover, the as-prepared mesoporous SiO<SUB>2</SUB>/LaCuS<SUB>2</SUB>-graphene nanocomposite exhibited a good photodegradation rate for a cationic organic dye group under a pH medium of 11. The photocatalytic performance of the phenol compound representation presented a good result, and the optimum amount of the catalytic for the gallic acid photocatalytic activity is 0.05 g. In addition, the mesoporous SiO<SUB>2</SUB>/LaCuS<SUB>2</SUB>-graphene catalyst can be exploited for the application of solar energy conversion with high hydrogen production capacity.</P> <P><B>Highlights</B></P> <P> <UL> <LI> The mesoporous SiO<SUB>2</SUB>/LaCuS<SUB>2</SUB>-graphene catalyst presented a good photocatalytic performance of organic dyes. </LI> <LI> The photocatalytic performance of the phenol compound representation presented a good result. </LI> <LI> The achieved catalyst can be exploited for the application of solar energy conversion. </LI> </UL> </P>

Mesoporous CuO-graphene coating of mesoporous TiO₂ for enhanced visible-light photocatalytic activity of organic dyes

Nguyen, Dinh Cung Tien,Cho, Kwang Youn,Oh, Won-Chun Elsevier Science B.V 2019 Separation and purification technology Vol.211 No.-

<P><B>Abstract</B></P> <P>This work presents a combination of mesoporous CuO-graphene and mesoporous TiO<SUB>2</SUB> materials, using a hydrothermal method at low temperature. The photocatalytic activity was evaluated for organic dyes decomposition. The high photocatalytic rate is mainly due to the high photogenerated electron-holes transport properties, as well as the mesoporous structure of the as-obtained CuO-graphene-TiO<SUB>2</SUB> photocatalyst. The as-prepared materials were characterized by XRD, nitrogen adsorption/desorption isotherms, SEM, EDX, TEM, HR-TEM, XPS, DRS, and Raman analysis. The highest photocatalytic activity of RBB organic dyes is mainly due to the large adsorption capacity of the as-obtained CuOGT material, as well as the high separation efficient of the photogenerated e<SUP>—</SUP>h<SUP>+</SUP> pairs. The as-prepared mesoporous CuO-graphene-TiO<SUB>2</SUB> material is a promising candidate for enhancing the photocatalytic performance of organic dyes, phenol compounds, and industrial wastewater.</P> <P><B>Highlights</B></P> <P> <UL> <LI> The high photocatalytic rate is mainly due to the high photogenerated electron-holes transport properties of the as-obtained mesoporous CuO-graphene-TiO<SUB>2</SUB> photocatalyst. </LI> <LI> This is attributed to the large BET surface area, large total pore volume, and small average pore size distribution, which play an important role in the photocatalytic performance. </LI> <LI> The as-prepared mesoporous CuO-graphene-TiO<SUB>2</SUB> material is a promising candidate for enhancing the photocatalytic performance of organic dyes, phenol compounds, and industrial wastewater. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

BONEcheck: A digital tool for personalized bone health assessment

Dinh Tan Nguyen,Thao P. Ho-Le,Liem Pham,Vinh P. Ho-Van,Tien Dat Hoang,Thach S. Tran,Steve Frost,Tuan V. Nguyen 대한골다공증학회 2023 Osteoporosis and Sarcopenia Vol.9 No.3

Objectives: Osteoporotic fracture is a significant public health burden associated with increased mortality risk and substantial healthcare costs. Accurate and early identification of high-risk individuals and mitigation of their risks is a core part of the treatment and prevention of fractures. Here we introduce a digital tool called 'BONEcheck' for personalized assessment of bone health. Methods: The development of BONEcheck primarily utilized data from the prospective population-based Dubbo Osteoporosis Epidemiology Study and the Danish Nationwide Registry. BONEcheck has 3 modules: input data, risk estimates, and risk context. Input variables include age, gender, prior fracture, fall incidence, bone mineral density (BMD), comorbidities, and genetic variants associated with BMD. Results: Based on the input variables, BONEcheck estimates the probability of any fragility fracture and hip fracture within 5 years, subsequent fracture risk, skeletal age, and time to reach osteoporosis. The probability of fracture is shown in both numeric and human icon array formats. The risk is also contextualized within the framework of treatment and management options on Australian guidelines, with consideration given to the potential fracture risk reduction and survival benefits. Skeletal age was estimated as the sum of chronological age and years of life lost due to a fracture or exposure to risk factors that elevate mortality risk. Conclusions: BONEcheck is an innovative tool that empowers doctors and patients to engage in wellinformed discussions and make decisions based on the patient's risk profile. Public access to BONEcheck is available via https://bonecheck.org and in Apple Store (iOS) and Google Play (Android).

Photocatalytic activities of contaminants by Bi₂WO₆-graphene composites decorated with mesoporous silica

Nguyen, Dinh Cung Tien,Cho, Kwang Youn,Jung, Chong-Hun,Oh, Won-Chun Elsevier 2018 Journal of alloys and compounds Vol.766 No.-

<P><B>Abstract</B></P> <P>This work reports a self-assembly method for preparing a composite of Bi<SUB>2</SUB>WO<SUB>6</SUB>-graphene and ordered mesoporous to form a novel ternary SiO<SUB>2</SUB>/Bi<SUB>2</SUB>WO<SUB>6</SUB>-graphene material. The successful synthesis was confirmed by physical tests such as XRD, SEM, TEM, EDX, XPS, DRS, Raman, and Galvano cyclic voltammetry. Moreover, the mesoporous structure of the obtained material was demonstrated by nitrogen adsorption/desorption isotherms. The investigations imply that the Bi<SUB>2</SUB>WO<SUB>6</SUB>-graphene composite was grown on an ordered mesoporous structure of the silica in a basic medium and the structure was modified with a cetyltrimethylammonium bromide surfactant. The photocatalytic activity was investigated in terms of photodegradation of cationic-anionic organic dye groups and the photocatalytic performance of gallic acid under visible light irradiation. The achieved results showed that the ternary SiO<SUB>2</SUB>/Bi<SUB>2</SUB>WO<SUB>6</SUB> catalyst holds promise to become a new potential photocatalyst for the enhancement of photocatalytic activities.</P> <P><B>Highlights</B></P> <P> <UL> <LI> The Bi<SUB>2</SUB>WO<SUB>6</SUB>-graphene composite was successfully grown on an ordered mesoporous structure of the silica. </LI> <LI> The degradation of MB at a pH of 11 in the presence of SiO<SUB>2</SUB>/Bi<SUB>2</SUB>WO<SUB>6</SUB>-graphene achieved the best photodegradation efficiency. </LI> <LI> The catalytic performance had a good result for the gallic acid degradation with 0.05 g photocatalyst. </LI> <LI> The ternary catalyst holds promise to become a new potential photocatalyst for the enhancement of photodegradation. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

A new synergetic mesoporous silica combined to CdSe-graphene nanocomposite for dye degradation and hydrogen evolution in visible light

Nguyen, Dinh Cung Tien,Zhu, Lei,Zhang, Qinfang,Cho, Kwang Youn,Oh, Won-Chun Elsevier 2018 Materials research bulletin Vol.107 No.-

<P><B>Abstract</B></P> <P>To promote outstanding qualities of mesoporous silica and enhance photocatalytic activity of CdSe and silica nanoparticles, the combination of SiO<SUB>2</SUB> nanoparticles from silica precursor with CdSe-graphene nanoparticles was processed under catering of cetyltrimethylammonium bromide (CTAB) and sodium lauryl sulfate (SLS) as the surfactant template. The as-synthesized sample exhibited highly efficient photocatalytic effects for treatment of MB and RBB organic dye solutions at optimum conditions for this study, including pH and catalyst dosage, were at pH 11 for MB dye solution case and pH 3 for RBB dye solution case and initial amount was 0.05 g catalyst for both cases. Besides, hydrogen generation of SiO<SUB>2</SUB>/CdSe-graphene was markedly higher than that of binary CdSe-graphene nanocomposite under ambient conditions with/without methanol 20% sacrificing reagents at room temperature. The SiO<SUB>2</SUB>/CdSe-graphene nanocomposite is capable of photocatalytic degradation of different organic dyes under visible light irradiation as well as for developing efficient hetero-system for hydrogen production.</P> <P><B>Highlights</B></P> <P> <UL> <LI> The SiO<SUB>2</SUB>/CdSe-graphene material is capable of photocatalytic degradation of different organic dyes under visible light irradiation. </LI> <LI> The large surface area of silica was provided a large response surface with a large quantity of reactions centers that needed H<SUB>2</SUB> generation. </LI> <LI> High H<SUB>2</SUB> generation can be attributed to the effective charge carrier system and a good charge transferability of graphene decorated with SiO<SUB>2</SUB>, and CdSe semiconductors. </LI> <LI> The ternary catalyst holds promise to become a new potential photocatalyst for developing efficient hetero-system for hydrogen production. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

Ischemic Colitis Presented as Pseudomembranous Colitis: An Untypical Case from Vietnam

Tien Manh Huynh,Quang Dinh Le,Khanh Lan Nguyen Bui,Minh Quang Huynh Bui,Cong Minh Hong Vo,Duc Trong Quach 대한소화기학회 2022 대한소화기학회지 Vol.80 No.2

Ischemic colitis (IC) is an underreported chronic disease characterized by the hypoperfusion of the bowel mucosa. The diagnosis and treatment may be challenging because its clinical course resembles other colitis or even colorectal malignancies. This paper reports an untypical case to underline the diversity of IC manifestation. A 68-year-old man with several comorbidities was admitted because of abdominal pain with a 6-month duration and a mass in the left lower quadrant. Colonoscopy revealed erosive pseudomembranous colitis narrowed colon segments with ulcerated mucosa mimicking colorectal cancer and inflammatory bowel disease. The stool cultures and Clostridium difficile toxin tests were negative. After the failure of conservative therapy, the Hartmann procedure with temporary ileostomy was performed uneventfully. The histological results of the surgical specimens revealed IC with focal pseudomembranous areas.

A Multidisciplinary approach to treat massive recurrent hematochezia from a jejunal Dieulafoy lesion: A case report

Tien Manh Huynh,Quang Dinh Le,Mai Ngoc Luu,Tram Thi Huyen Nguyen,Quy Nhuan Bui,Anh Phan Tuong Mai,Thang Hiep Duc Tran,Hien Minh Tran,Cong Hong Minh Vo,Duc Trong Quach 소화기인터벤션의학회 2022 International journal of gastrointestinal interven Vol.11 No.3

Jejunal Dieulafoy lesion (DL) is an exceedingly rare, life-threatening cause of gastrointestinal bleeding. Due to its rarity, intermittent bleeding symptoms that often necessitate prompt clinical intervention, variability in detection and treatment methods, and the risk of rebleeding, this condition frequently presents a diagnostic and therapeutic conundrum. We report a case of severe, intermittent, recurrent hematochezia due to a jejunal DL that was difficult to localize. In this case, the metallic coils used as a radiopaque marker allowed surgeons to accurately identify the bleeding site during intraoperative enteroscopy and successfully manage the lesion with minimally invasive laparoscopic surgery.

Modeling and Energy Management Strategy in Energetic Macroscopic Representation for a Fuel Cell Hybrid Electric Vehicle

Dinh, To Xuan,Thuy, Le Khac,Tien, Nguyen Thanh,Dang, Tri Dung,Ho, Cong Minh,Truong, Hoai Vu Anh,Dao, Hoang Vu,Do, Tri Cuong,Ahn, Kyoung Kwan The Korean Society for Fluid Power and Constructio 2019 드라이브·컨트롤 Vol.16 No.2

Fuel cell hybrid electric vehicle is an attractive solution to reduce pollutants, such as noise and carbon dioxide emission. This study presents an approach for energy management and control algorithm based on energetic macroscopic representation for a fuel cell hybrid electric vehicle that is powered by proton exchange membrane fuel cell, battery and supercapacitor. First, the detailed model of the fuel cell hybrid electric vehicle, including fuel cell, battery, supercapacitor, DC-DC converters and powertrain system, are built on the energetic macroscopic representation. Next, the power management strategy was applied to manage the energy among the three power sources. Moreover, the control scheme that was based on back-stepping sliding mode control and inversed-model control techniques were deduced. Simulation tests that used a worldwide harmonized light vehicle test procedure standard driving cycle showed the effectiveness of the proposed control method.