Materials and methods

Lecture Finite Element Method - Dr. Danh Truong Nguyen (Eng) is a comprehensive introduction to the fundamental principles and applications of the finite element method in engineering. The lecture covers topics such as energy principles, elastic problems, bar and truss elements, beam and frame analysis, plane stress and strain, and numerical integration techniques. This material is especially useful for students and professionals in mechanical, civil, and structural engineering.

59p hoatrongguong02 15-05-2025 1 1   Download

In this study, a composite material between MnFe2O4 and activated carbon from coffee husks (MFO/AC) was synthesized using co-precipitate and hydrothermal methods to remove ammonium from aqueous solutions. The characteristics of MFO/AC were characterized and evaluated by scanning electron microscopy (SEM) and Fourier transform infrared spectra (FTIR).

9p vijiraiya 19-05-2025 2 1   Download

Although molar-incisor hypomineralization (MIH) is prevalent in Asian countries, no studies have evaluated its impact on oral health-related quality of life (OHRQoL). The aim of this study was to determine the impact of MIH on OHRQoL in Vietnamese schoolchildren. Materials and methods: This crosssectional study with 432 Vietnamese children aged 8-10 years was conducted in Hue city, Vietnam.

6p vijiraiya 19-05-2025 1 1   Download

Surface electromyographic (EMG) devices are becoming more and more popular to assess sleep bruxism. Objectives: To evaluate characteristics of sleep bruxism using EMG Logger. Materials and Methods: A convenient sample of the patients at Hue University of Medicine and Pharmacy Hospital who had clinical signs related to sleep bruxism was collected.

11p vijiraiya 19-05-2025 3 1   Download

In the study, the total nitrogen content of natural rubber was determined to evaluate the effectiveness of deproteinization on the synthesis of chemically modified rubber materials. The remaining protein content in the obtained deproteinized natural rubber (DPNR) was analyzed as nitrogen content using the Kjeldahl method.

8p visarada 28-04-2025 1 1   Download

In this paper, the authors have based on the methodologies of historical materialism and diffusionism, as well as research methods such as comparison, analysis and synthesis, logic and history, abstraction and generalization.

14p viling 11-10-2024 3 0   Download

This study evaluated the test-retest reliability of the question about trouble with the locomotive organs in the NMQ in Vietnamese physical therapists (VPTs). Materials and method: It was a cross-sectional study in 10 VPTs by a convenient sampling technique.

6p vifilm 11-10-2024 3 1   Download

The purpose of this study was to create an animal model of a mandibular alveolar bone defect without compromising the animal’s well-being. Materials and methods: A total of 24 New Zealand white rabbits underwent surgery to create mandibular alveolar bone defects.

10p viengfa 23-10-2024 4 1   Download

Folding plates with wavy shapes made of composite materials have been widely applied, hence designing this type of structure is significant in practice. In this research work, the results of static calculation of the sinusoidal corrugated composite plates will be analyzed.

9p viengfa 28-10-2024 4 1   Download

The auxiliary parts of the impact test hammer are only suitable for certain cases. The impact velocity of other cases are determined by measuring. Instead of measuring multiple times, the hammer velocity calculating method and program is suggested by this article for general cases and the input parameters will be changed for the other cases. The calculation results are verified by using a high speed camera to measure the hammer velocity.

9p viyuhi 26-03-2025 4 1   Download

Photoluminescent composites consisting of a photoluminescent material dispersed in a suitable matrix have been applied in many applications, such as light-emitting diodes, solar concentrators, and anticounterfeiting inks. In this study, we have demonstrated a one-step method to prepare homogeneous composites by inducing the formation of in-situ photoluminescent centers in a stable matrix.

8p viaburame 14-03-2025 1 1   Download

In this study, we synthesized YPO4:x%Tb3+ using the combustion synthesis method and investigated the effects of annealing temperature and dopant concentration on the structural, morphological, and optical properties of the material.

8p viaburame 14-03-2025 3 1   Download

In this study, spinel ferrite nanoparticles CoFe2-xLaxO4 (x = 0, 0.025, and 0.05) were successfully synthesized via a simple co-precipitation method using a 5% NaOH solution as a precipitating agent. The physicochemical properties of the materials, annealed at 850 °C for one hour, were characterized using powder X-ray diffraction (PXRD), energy-dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM), and vibrating-sample magnetometry (VSM) at room temperature.

10p viling 11-10-2024 3 1   Download

In the present work, CeO2 with different loading was embedded on reduced graphene oxide (rGO) by a simple one-pot hydrothermal method. The synthesized samples were characterized using XRD, EDX mapping, FESEM, and UV-Vis DRS techniques.

11p vifilm 11-10-2024 4 1   Download

This study aims to generate the system of histone deacetylase enzymes (HDAC) with its cofactor zinc ion using two different parameter models and application of molecular dynamic (MD) study for structure of HDAC2 and vorinostat ligand. Materials and methods: Two non-bonded models, including 12-6-4 Lennard-Jones and cationic dummy atom, were applied for building a solvation system of HDAC2 crystal structure with presence of suber-anilohydroxamic acid (SAHA) and zinc ion.

9p vihyuga 04-03-2025 4 1   Download

This study aimed to extract cellulose fibers from coffee grounds using a non-toxic and cost-efficient alkaline hydrogen peroxide extraction method. Scanning electron microscopy (SEM) analysis results indicated that, after being dried, the cellulose fibers tended to aggregate into bundles, with no individual fibers observed.

8p viinuzuka 28-02-2025 7 1   Download

This article provides an overview of methods for creating eco-friendly products using two primary materials: recycled coffee grounds and plastic bottles within the textile industry. Integrating technology and utilizing recycled materials significantly contribute to producing valuable products that aid in environmental conservation and promote sustainable manufacturing.

7p viyamanaka 06-02-2025 5 1   Download

Recognizing clinical and paraclinical reduce morbidity and mortality from this disease. Objective: To investigate the association of factors, clinical and paraclinical characteristics, and treatment outcomes of Eosinophilic meningitis. Materials and methods: Reports on a series of diseases detected with eosinophilic meningitis at the Department of Infectious Diseases at Can Tho Children's Hospital.

6p viakimichi 17-01-2025 5 2   Download

The research focuses on the composition of a hard capsule formula containing the extracts of Houttuynia cordata, Morus alba, and Carica papaya as well as the development of testing standards for prepared hard capsules. Materials and methods: the ratio of adsorbents and fillers in the formula was investigated so that the granules had low moisture, a suitable flow rate, and the appropriate apparent density for packaging.

9p vinara 11-01-2025 1 1   Download

The study investigates the changes in serum ADH concentration and finds out the relationship between prognosis factors in brain trauma injury, such as sodium treatment time at Emergency Department and patients' lives. Materials and methods: The study subjects include brain trauma patients, Glasgow Coma Scale 8, hospitalized for fewer than 72 hours at Hue Central Hospital with CT scans of the brain and diagnosis of brain trauma injury.

5p viuchiha 06-01-2025 3 1   Download