Experimental

Bài viết trình bày đánh giá hiệu quả chương trình giáo dục sức khỏe về dinh dưỡng đối với kiến thức và hành vi tuân thủ chế độ ăn uống của người bệnh viêm tụy cấp. Đối tượng và phương pháp nghiên cứu: Bán thực nghiệm (Quasi-Experimental Study), một nhóm gồm 44 người bệnh (NB) viêm tụy cấp (VTC) điều trị tại khoa Nội tiêu hóa, Bệnh viện Nhân dân Gia Định trong khoảng thời gian từ tháng 01 năm 2021 đến tháng 09 năm 2021, được can thiệp giáo dục sức khỏe (GDSK) về chế độ dinh dưỡng và tham gia khảo sát trước can thiệp và sau khi xuất viện một tháng.

5p vicarlos 16-05-2024 10 0   Download

This modeling is performed on an experimental data set of complexes, where the metal ions of these complexes include transition ion metals and lanthanide ion metals. We use these models to develop a series of new thiosemicarbazone and their complexes; simultaneously, the complexes are worked out the stability constants from the novel models.

9p dianmotminh02 03-05-2024 6 2   Download

A new semi-empirical technic has been established relying on the linkage between the chemistry in the bulk liquid and that taking place in the acoustic cavitation bubble. The open-source COPASI software has been used for the optimization of number density according to the total yield of a single bubble and the fitting of the experimental yield of hydrogen peroxide in the sonicated solution. It was observed that the number density is increased with the rise of ultrasound frequency from 200 to 1140 kHz, independently of the saturating gas nature (O2, Ar or air).

10p dianmotminh02 03-05-2024 2 2   Download

The F2B slab model weakens the oscillations and calculations on F2B model quickly converge. However, the F2B model leads to artificial narrowness of band gap. Besides, when the number of layers increases, surface energy obtained from all three slab models approaches similar values. In particular, values of surface energy from DFT calculations converge to the experimental range for all three slab models.

8p dianmotminh02 03-05-2024 7 2   Download

One new sesquiterpene, (4S,7R,10S)-2-oxo-4,10,11-trihydroxyguaia-1(5)-ene, and five lignans, kadsuralignan J, isovaleroylbinankadsurin A, schizandrin O, futokakadsurin C and arisantetralone were isolated from the roots of Kadsura induta. Their chemical structures were revealed by MS, 1D and 2D NMR spectra in comparison with the reported data. The absolute configuration of compound 1 was determined by calculation of its theoretical ECD spectra and compared with the experimental results.

9p dianmotminh02 03-05-2024 5 2   Download

In this research, an algorithm has been developed to predict traffic density on the delayed Lighthill - Whitham - Richards (LWR) model, in which a regularization difference method has been proposed as the basis for the algorithm. This article mainly focus on building an algorithm and performing experimental calculations to verify the correctness of the algorithm on a mathematical model.

7p gaupanda024 04-04-2024 7 1   Download

To evaluate the acute toxicity and semi-chronic toxicity of the remedy “Bo phe dinh suyen QY” on experimental animals. Subjects and methods: The remedy “Bo phe dinh suyen QY” meeting basic standards was used to evaluate for acute toxicity in Swiss white mice, and for semi-chronic toxicity in Wistar white rats. Acute toxicity was assessed according to the Litchfield-Wilcoxon method. Sub-chronic toxicity was assessed according to the guidance of the Ministry of Health of Vietnam.

4p viohoyo 02-04-2024 3 2   Download

The effect of machining parameters on the surface roughness in dry-turning Ti6Al4V alloy using an experimental design method was investigated. A mathematical equation based on the response surface methodology was established to fully understand the influence of machining parameters (cutting speed, feed rate, and depth of cut) on the surface roughness.

9p viwarmachine 01-07-2023 11 3   Download

In this thesis, a numerical model with detailed reaction mechanism which is tailored for studying the behaviour of combustion of natural gas has been introduced and validated with available experimental data. The numerical model attempts to comprehensively simulate the physical conditions (temperature and pressure), equivalent ratio, and fuel dilution and strain rate effect in the laminar flames.

158p runthenight05 01-03-2023 10 3   Download

Magnetic bearing systems have received much attention in the research community for the past decades. Its inherent nonlinearity and open-loop instability present challenges for controller design. This thesis investigates and designs model predictive control (MPC) systems for an experimental Active Magnetic Bearing (AMB) laboratory system. A host-target development environment of real-time control system with hardware in the loop (HIL) is used for implementation of the predictive control systems. In this thesis, both continuous and discrete time model predictive controllers are studied.

172p runthenight05 01-03-2023 6 3   Download

This dissertation aims to investigate the electrical impedance properties of fruits and vegetables, and explore the relationship between impedance and quality criteria. In particular, the present dissertation outlines experimental research conducted on relationships between impedance properties and fruit tastes as well as the impedance changes observed during ripening process. Impedance measurement to monitor moisture content changes in the progress of drying is also included in this research.

116p runthenight05 01-03-2023 6 2   Download

This study focuses on experimental testing and subsequent numerical analysis of impacted and pre-loaded composite coupons and bonded composite scarf joints under varying impact conditions. A methodology will be developed for the numerical modelling of preloaded impact tests to enable capture of critical failure modes and ultimate failure. The main aim is to validate a modelling strategy that will provide accurate failure characterisation of the tested joints using numerical analysis.

185p runthenight05 01-03-2023 5 3   Download

The aim of this Master of Engineering (MEng) - Aerospace thesis is to study the structural response and failure of aerospace grade composites during exposure to fire. Key aspects of the research are to analyse the thermal and mechanical responses of laminates and sandwich composites in high temperature and fire environments, which result in softening and structural failure. The research is concentrated on carbon/epoxy laminates and sandwich composites, which are the most common composite materials used in aerospace structures.

209p runthenight05 01-03-2023 7 3   Download

One of the limitations of the BDI (Belief-Desire-Intention) model is the lack of any explicit mechanisms within the architecture to be able to learn. In particular, BDI agents do not possess the ability to adapt based on past experience. This is important in dynamic environments as they can change, causing previously successful methods for achieving goals to become inefficient or ineffective.

108p runthenight07 01-03-2023 9 3   Download

The focus of this thesis was to study the chemotaxonomic relationship of selected southern Australian marine brown algae of the genera Cystophora and Sargassum. Consequently, this resulted in the isolation and structure elucidation of six new terpenoids from two southern Australian marine brown algae Cystophora moniliformis and Sargassum fallax together with 10 previously reported natural products. As a result of the re-isolation of these known secondary metabolites, updated and complete structural characterisation data could be provided for the first time for 7 of these compounds.

132p runthenight07 01-03-2023 6 3   Download

The aim of this project is to provide a summary of the current knowledge on energy recovery options from wastewater treatment plants sludge and/or biosolids. This covers technologies as well as data from case studies and research experimental results. The focus of the study is the ATP. The project methodology comprised two stages. The first stage involved a review of the current literature.

166p runthenight07 01-03-2023 7 3   Download

This thesis investigates the SPH capability available in the commercial Finite Element (FE) code LS-DYNA®, for water impact problems. Experiments have been conducted on rigid wedges impacting water, which were then simulated with the SPH method. Although certain limitations were experienced with the experimental results, a positive correlation was observed with the numerical technique, thus establishing SPH as a promising method for crashworthiness design.

176p runthenight07 01-03-2023 7 3   Download

The aim of this research is to improve the reliability of the dynamic formula. This research program will concentrate on the proposal of a correction factor to adjust for this dynamic component similar to the damping parameter used in the Wave Equation Analysis and validate its reliability experimentally and theoretically. Similarly, the issue of the variation in the hammer energy delivered to pile needs to be improved by the adoption of new technology and validate experimentally.

207p runthenight07 01-03-2023 5 3   Download

The thesis is structured as follows: Chapter 1 Introduction; Chapter 2 Literature Review; Chapter 3 Experimental Design, Development and Application of an Accelerated Drill Test; Chapter 4 Discussion: The Developed Accelerated Drill Test; Chapter 5 Conclusions and Recommendations for Further Work; Appendix A – VMC Setup and Programming for Drill Testing; Appendix B - Designing an Automated Drill Test and DAQ System for Spindle Current Collection.

172p runthenight07 01-03-2023 5 3   Download

This thesis emphasizes on implementing and experimentally demonstrating innovative fabrication solutions for micro-scale metamaterials designed to operate in the terahertz electromagnetic regime. Microfabrication is a conventional fabrication technique that has been employed to fabricate metamaterials operating at terahertz frequencies.

81p runthenight07 01-03-2023 7 4   Download