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Article: A Simplified Kinetic Modeling of CO

Tran, Mai Lien / Nguyen, Chi Hieu / Chu, Kuan-Yan / Juang, Ruey-Shin

2023 Volume 13, Issue 5

Abstract: The absorption of ... ...

Abstract	The absorption of CO
Language	English
Publishing date	2023-05-05
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2614641-1
ISSN	2077-0375
ISSN	2077-0375
DOI	10.3390/membranes13050494
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Book ; Online: Multi-UAV Assisted Data Gathering in WSN

Nguyen, Chi-Hieu / Nguyen, Khanh-Van

A MILP Approach For Optimizing Network Lifetime

2021

Abstract: In this paper, we study the problem of gathering data from large-scale wireless sensor networks using multiple unmanned air vehicles (UAVs) to gather data at designated rendezvouses, where the goal is to maximize the network lifetime. Previous proposals ... ...

Abstract	In this paper, we study the problem of gathering data from large-scale wireless sensor networks using multiple unmanned air vehicles (UAVs) to gather data at designated rendezvouses, where the goal is to maximize the network lifetime. Previous proposals often consider a practical approach where the problem of determining a data gathering scheme is decomposed into 2 sub-problems: i) partitioning the networks into clusters for determining the rendezvouses as these obtained cluster heads; and ii) determining the paths for a set of a given number of UAVs to come gathering data at these rendezvouses which have been harvesting data within each local clusters, respectively. We try to deal with this as a whole optimization problem, expecting a significant increase in computation complexity which would bring new challenge in creating practical solutions for large-scale WSNs. We introduce two alternatives mixed-integer linear programming (MILP) formulations, namely the 2-index model with $O(n^2)$ variables and the 3-index model that has $O(n^3)$ variables, where $n$ denotes the number of sensor nodes. We show that our best model could solve optimally the problem instances with up to 50 sensor nodes in less than 30 minutes. Next, we propose a heuristic idea to reduce the number of variables in implementing the 3-index model to effectively handle larger-scale networks with size in hundreds. The experiment results show that our heuristic approach significantly prolongs the network lifetime compared to existing most efficient proposals.
Keywords	Computer Science - Networking and Internet Architecture
Subject code	006
Publishing date	2021-08-24
Publishing country	us
Document type	Book ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Locked thumb metacarpophalangeal joint due to sesamoid bone entrapment: A case report and review of literature.

Do Phuoc, Hung / Pham Quang, Vinh / Nguyen Chi, Hieu / Nguyen Hoang, Phu / Hoang Quoc, Huy / Nguyen, Ngoc

Trauma case reports

2023 Volume 47, Page(s) 100905

Abstract: Locked thumb metacarpophalangeal (MCP) joint has been known as a relatively rare condition. We present a case of a 25-year-old male presented with a traumatic locked thumb MCP joint of the right hand. Clinical presentation showed the joint was in a ... ...

Abstract	Locked thumb metacarpophalangeal (MCP) joint has been known as a relatively rare condition. We present a case of a 25-year-old male presented with a traumatic locked thumb MCP joint of the right hand. Clinical presentation showed the joint was in a hyperextention position and resistant to active flexion and extension. The radial sesamoid was distally displaced on X-ray film and entrapped into the joint on CT scan. The mechanism of the locked MCP joint was thought as a "pull-hook lock" between the pointed proximal edge of the sesamoid and the deformed volar groove on the cartilaginous surface of the metacarpal head. Surgical treatment included partially releasing the insertion of the abductor pollicis brevis (APB) and flexor pollicis brevis (FPB) muscles to move the entrapped radial sesamoid, and resurfacing the deformed metacarpal head.
Language	English
Publishing date	2023-08-15
Publishing country	Netherlands
Document type	Case Reports
ZDB-ID	2835433-3
ISSN	2352-6440 ; 2352-6440
ISSN (online)	2352-6440
ISSN	2352-6440
DOI	10.1016/j.tcr.2023.100905
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Article: Giant schwannoma on the lower leg: A case report and review of the literature.

Pham Quang, Vinh / Hoang Quoc, Huy / Nguyen, Bach / Ngo Quang, Chuong / Nguyen Chi, Hieu / Nguyen, Ngoc

International journal of surgery case reports

2023 Volume 109, Page(s) 108468

Abstract: Introduction and importance: Peripheral nerve sheath tumors are common neoplasm with different biological features ranging from benign to malignant. The majority of these tumors are smaller than 5 cm, whereas those larger are termed giant schwannomas. ... ...

Abstract	Introduction and importance: Peripheral nerve sheath tumors are common neoplasm with different biological features ranging from benign to malignant. The majority of these tumors are smaller than 5 cm, whereas those larger are termed giant schwannomas. When localized in the lower legs, the maximum length of the schwannoma is less than 10 cm. We report a case of giant schwannoma of the leg and its management. Case presentation: A 11-year-old boy presented with a 13 cm × 5 cm firm, smooth, well-defined margin mass in the posterior-medial aspect of right leg. The tumor was fusiform, well capsulated, multi-lobulated soft tissue with 13 cm × 4 cm × 3 cm in size at the biggest region. On MRI the tumor was low signal, isointense with adjacent tissue on T1S, hyper-intense on T2-FS sequences and surrounded by a thin fat-like intense rim. Biopsy findings were considered most consistent with Schwannoma (Antoni A). Tumor resection was performed. The mass appeared capsulated, white, and glistening with 132 mm × 45 mm × 34 mm in size. Postoperative course was uneventful without neurological deficit. Clinical discussion and conclusion: Schwannomas are the most common peripheral nerve sheath tumors that derived almost entirely from Schwann cells. Schwannomas usually affect the head and neck region, localization in the lower extremity is rare. When located in lower extremity, the maximum diameter of 5 cm is described in most studies. Clinical presentation of schwannomas is unclear and unspecific. Diagnosis is based on ultrasound, MRI, and histology. The recommended treatment for schwannoma is surgical enucleation or resection without damaging the involved nerve.
Language	English
Publishing date	2023-07-06
Publishing country	Netherlands
Document type	Case Reports
ISSN	2210-2612
ISSN	2210-2612
DOI	10.1016/j.ijscr.2023.108468
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Article ; Online: A portable band-shaped bioimpedance system to monitor the body fat and fasting glucose level

Duong Trong Luong / Nguyen Quang Linh / Hoang Anh Duc / Dang Tuan Diep / Nguyen Chi Hieu / Nguyen Minh Duc

Journal of Electrical Bioimpedance, Vol 13, Iss 1, Pp 54-

2022 Volume 65

Abstract: With better quality of life, obesity is becoming a worldwide disease due to over-eating and sedentary lifestyle. Therefore, daily monitoring of the glucose and body fat percentage (%) is vital to keep track of one’s health. Currently, separated devices ... ...

Abstract	With better quality of life, obesity is becoming a worldwide disease due to over-eating and sedentary lifestyle. Therefore, daily monitoring of the glucose and body fat percentage (%) is vital to keep track of one’s health. Currently, separated devices are required to monitor each parameter at home and some are still invasive to measure the glucose level. In this study, a portable band-shaped bioimpedance system is proposed to measure both parameters. The system is battery run with two main modules: the current source and the voltage recording, with minimal design to fit into a band of 150 mm x 40 mm in dimension. The impedance is measured at the frequency of 1 kHz at 30 kHz sampling frequency and in 1000 signal cycles to flatten noises. The final average impedance is calculated and evaluated in correlation with the body fat and the fasting glucose. The system was tested on 21 volunteers and 4 locations were picked for the impedance measurement: the arm under the triceps, the side of the belly, the back on one side and the thigh under the bicep femoris. The results show promising results with the arm being the best location for predicting the body fat (correlation coefficient: 0.89, 95% CI: 0.73-0.95), while the thigh impedance best correlated with the fasting glucose (correlation coefficient: 0.92, 95% CI: 0.81-0.97). These preliminary results indicate the feasibility and capacity of the proposed system as a home-based, portable and convenient system in monitoring the body fat and glucose. The system’s performance will be verified and replicated in a future larger study.
Keywords	bioimpedance ; home-based device ; obesity ; Medicine (General) ; R5-920
Subject code	600
Language	English
Publishing date	2022-11-01T00:00:00Z
Publisher	Sciendo
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Book ; Online: A Novel Blockchain Based Information Management Framework for Web 3.0

Hassan, Md Arif / Nguyen, Cong T. / Nguyen, Chi-Hieu / Hoang, Dinh Thai / Nguyen, Diep N. / Dutkiewicz, Eryk

2024

Abstract: Web 3.0 is the third generation of the World Wide Web (WWW), concentrating on the critical concepts of decentralization, availability, and increasing client usability. Although Web 3.0 is undoubtedly an essential component of the future Internet, it ... ...

Abstract	Web 3.0 is the third generation of the World Wide Web (WWW), concentrating on the critical concepts of decentralization, availability, and increasing client usability. Although Web 3.0 is undoubtedly an essential component of the future Internet, it currently faces critical challenges, including decentralized data collection and management. To overcome these challenges, blockchain has emerged as one of the core technologies for the future development of Web 3.0. In this paper, we propose a novel blockchain-based information management framework, namely Smart Blockchain-based Web, to manage information in Web 3.0 effectively, enhance the security and privacy of users data, bring additional profits, and incentivize users to contribute information to the websites. Particularly, SBW utilizes blockchain technology and smart contracts to manage the decentralized data collection process for Web 3.0 effectively. Moreover, in this framework, we develop an effective consensus mechanism based on Proof-of-Stake to reward the user's information contribution and conduct game theoretical analysis to analyze the users behavior in the considered system. Additionally, we conduct simulations to assess the performance of SBW and investigate the impact of critical parameters on information contribution. The findings confirm our theoretical analysis and demonstrate that our proposed consensus mechanism can incentivize the nodes and users to contribute more information to our systems.
Keywords	Computer Science - Cryptography and Security
Subject code	303
Publishing date	2024-01-23
Publishing country	us
Document type	Book ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Tetracycline Removal from Water by Adsorption on Hydrochar and Hydrochar-Derived Activated Carbon

Duong Minh Ngoc / Nguyen Chi Hieu / Nguyen Huy Trung / Hoang Huu Chien / Nguyen Quang Thi / Nguyen Duy Hai / Huan-Ping Chao

Sustainability, Vol 15, Iss 4412, p

Performance, Mechanism, and Cost Calculation

2023 Volume 4412

Abstract: The objective of this study was to investigate the adsorption performance and mechanisms of tetracycline (TC) on hydrochar and hydrochar-derived activated carbon. We also assessed the influence of the solution pH and ionic strength on the adsorption of ... ...

Abstract	The objective of this study was to investigate the adsorption performance and mechanisms of tetracycline (TC) on hydrochar and hydrochar-derived activated carbon. We also assessed the influence of the solution pH and ionic strength on the adsorption of these compounds and studied their removal by synthetic adsorbents. The maximum adsorption capacities of TC estimated by the Langmuir model in pH 5.5 solution at 25 °C were found to follow the order: ACZ1175 (257.28 mg/g) > MGH (207.11 mg/g) > WAC (197.52 mg/g) > MOPH (168.50 mg/g) > OPH (85.79 mg/g) > GH (75.47 mg/g). The pH value and ionic strength affected TC’s adsorption on the adsorbents. These results indicate that the electrostatic interaction plays a critical role in these adsorption processes. Moreover, adsorption kinetic curves and adsorption isotherms demonstrated that electrostatic interactions were not the only adsorption driving force. Except for electrostatic interactions, the main adsorption mechanisms involved hydrogen bonding and π-π interaction. In addition, the cost of oxidized hydrochar (USD 4.71/kg) is slightly higher than that of hydrochar-derived activated carbon (USD 3.47/kg). This production cost would be lower when it can be produced on a large scale. The outcomes of this study show that the modified-hydrochar and hydrochar-derived activated carbon had the potential for TC removal in wastewater.
Keywords	compound-synthetic adsorbent ; tetracycline ; adsorption mechanisms ; cost calculation ; Environmental effects of industries and plants ; TD194-195 ; Renewable energy sources ; TJ807-830 ; Environmental sciences ; GE1-350
Subject code	333
Language	English
Publishing date	2023-03-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: A Portable Band-shaped Bioimpedance System to Monitor the Body Fat and Fasting Glucose Level.

Duong Trong, Luong / Nguyen Quang, Linh / Hoang Anh, Duc / Dang Tuan, Diep / Nguyen Chi, Hieu / Nguyen Minh, Duc

Journal of electrical bioimpedance

2022 Volume 13, Issue 1, Page(s) 54–65

Abstract	With better quality of life, obesity is becoming a worldwide disease due to over-eating and sedentary lifestyle. Therefore, daily monitoring of the glucose and body fat percentage (%) is vital to keep track of one's health. Currently, separated devices are required to monitor each parameter at home and some are still invasive to measure the glucose level. In this study, a portable band-shaped bioimpedance system is proposed to measure both parameters. The system is battery run with two main modules: the current source and the voltage recording, with minimal design to fit into a band of 150 mm x 40 mm in dimension. The impedance is measured at the frequency of 1 kHz at 30 kHz sampling frequency and in 1000 signal cycles to flatten noises. The final average impedance is calculated and evaluated in correlation with the body fat and the fasting glucose. The system was tested on 21 volunteers and 4 locations were picked for the impedance measurement: the arm under the triceps, the side of the belly, the back on one side and the thigh under the bicep femoris. The results show promising results with the arm being the best location for predicting the body fat (correlation coefficient: 0.89, 95% CI: 0.73-0.95), while the thigh impedance best correlated with the fasting glucose (correlation coefficient: 0.92, 95% CI: 0.81-0.97). These preliminary results indicate the feasibility and capacity of the proposed system as a home-based, portable and convenient system in monitoring the body fat and glucose. The system's performance will be verified and replicated in a future larger study.
Language	English
Publishing date	2022-11-04
Publishing country	Poland
Document type	Journal Article
ZDB-ID	2580506-X
ISSN	1891-5469 ; 1891-5469
ISSN (online)	1891-5469
ISSN	1891-5469
DOI	10.2478/joeb-2022-0009
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Article ; Online: Hybridizing Ag-Doped ZnO nanoparticles with graphite as potential photocatalysts for enhanced removal of metronidazole antibiotic from water.

Tran, Mai Lien / Nguyen, Chi Hieu / Fu, Chun-Chieh / Juang, Ruey-Shin

Journal of environmental management

2019 Volume 252, Page(s) 109611

Abstract: In this study, the ZnO nanoparticles were doped with Ag and then hybridized on graphite (GP) layer (Ag-ZnO/GP) by a hydrothermal method, which was used as photocatalysts to remove metronidazole (MNZ) antibiotic from aqueous solutions. The fine structure, ...

Abstract	In this study, the ZnO nanoparticles were doped with Ag and then hybridized on graphite (GP) layer (Ag-ZnO/GP) by a hydrothermal method, which was used as photocatalysts to remove metronidazole (MNZ) antibiotic from aqueous solutions. The fine structure, morphologies, and optical properties of the synthesized composites were first examined. The incorporation of Ag would readily reduce the rate of the recombination of electron-hole pairs and enhance the photocatalytic activity in a wide range of light wavelength. The graphite surface also acted as an electron sink to efficiently inhibit the photocorrosion of ZnO, thereby improving the photostability of the composites. The composition of the composite was optimized to be 0.5 wt% GP/ZnO and 1.0 wt% Ag/ZnO according to the extent of the enhancement of photocatalytic activity. In a solution containing 30 mg L
MeSH term(s)	Anti-Bacterial Agents ; Catalysis ; Graphite ; Metronidazole ; Nanoparticles ; Silver ; Water ; Zinc Oxide
Chemical Substances	Anti-Bacterial Agents ; Water (059QF0KO0R) ; Metronidazole (140QMO216E) ; Silver (3M4G523W1G) ; Graphite (7782-42-5) ; Zinc Oxide (SOI2LOH54Z)
Language	English
Publishing date	2019-10-03
Publishing country	England
Document type	Journal Article
ZDB-ID	184882-3
ISSN	1095-8630 ; 0301-4797
ISSN (online)	1095-8630
ISSN	0301-4797
DOI	10.1016/j.jenvman.2019.109611
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Article ; Online: In vitro and field responses of various active ingredients to Fusarium proliferatum species which causes Fusarium root rot disease in Indian mulberry (Morinda officinalis How.) in Thai Nguyen

Duong Thi Nguyen / Nguyen Thi Nhu Hoa / Le Thi Kieu Oanh / Dang Kim Tuyen / Nguyen Chi Hieu / Duong Son Ha / To Thi Ngan

Vietnam Journal of Science, Technology and Engineering, Vol 61, Iss

2022 Volume 2

Abstract: Fusarium proliferatum has been identified as the causal pathogen of Fusarium root rot of Ba kich (Morinda officinalis) (FRRBK). No studies are available regarding the effectiveness of chemical treatments on the disease incidence of FRRBK. The efficacy of ...

Abstract	Fusarium proliferatum has been identified as the causal pathogen of Fusarium root rot of Ba kich (Morinda officinalis) (FRRBK). No studies are available regarding the effectiveness of chemical treatments on the disease incidence of FRRBK. The efficacy of five active ingredients (metconazole, prochloraz, tebuconazole, kresoximmethyl, and pyraclostrobin) from two chemical groups (demethylation inhibitors and quinone outside inhibitors) in reducing three isolates (BKVN, BKDT, and BKPL) of F. proliferatum mycelial growth was tested in vitro. The results indicate that only metconazole, prochloraz, and tebuconazole are highly effective in inhibiting the mycelial growth of F. proliferatum. These were selected for investigation of their efficacy with regard to the disease incidence of FRRBK in pot and in field conditions. Prochloraz and metconazole showed the highest efficacy and significantly suppressed the disease incidence of FRRBK in pot and in field conditions.
Keywords	Ba kich ; demethylation inhibitors ; Fusarium proliferatum ; Morinda officinalis ; quinone outside inhibitor ; Science ; Q
Subject code	571
Language	English
Publishing date	2022-04-01T00:00:00Z
Publisher	Vietnam Ministry of Science and Technology
Document type	Article ; Online
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