Mechanical systems

The study was therefore conducted to gain more insights into EFL teaching practices at Vietnamese high schools under the influences of the NHSGE English tests. Two main aspects of EFL teaching, including “what and how teachers teach” in the centralized educational context of Vietnam would be explored.

20p viling 11-10-2024 0 0   Download

In this article, the research team proposes a costeffective IoT-based approach, integrating data like SCADA, to enhance management and monitoring convenience. The research outcome aims to design an electrical cabinet that includes various mechanisms to detect, and safeguard loads from potential incidents, while also being capable of collecting operational data, recording incident occurrences, and integrating with the central management system at the construction site.

7p viyoko 01-10-2024 1 1   Download

This study proposes therefore to apply the transmissibility functions for modal identification of ambient vibration testing and investigates its performance in presence of harmonics. Numerical examples and an experimental test are used for illustration and validation.

14p vifilm 24-09-2024 7 1   Download

The research in the field of cementitious materials has brought towards many non-traditional binder systems. One of these systems, a ternary binder composed of calcium aluminate cement (CAC), ordinary Portland cement (OPC), and calcium sulfate (C$Hx), called ettringite binder, offers a possibility of very rapid development in mechanical strength.

6p viyoko 24-09-2024 2 1   Download

Các bộ vi kích hoạt đóng vai trò quan trọng trong việc dẫn động các thiết bị vi cơ điện tử (MEMS– Micro-electro-mechanical System). Bài viết giới thiệu phương pháp giảm điện trở bề mặt của bộ vi kích hoạt điện nhiệt dạng chữ V, từ đó, giảm điện áp dẫn, nâng cao chuyển vị, tỷ trọng công suất của bộ vi kích hoạt.

9p visergeyne 18-06-2024 8 1   Download

In this work, the free vibration analysis of Timoshenko microbeams made of the Functionally Graded Material (FGM) on the Winkler–Paternak elastic foundation based on the Modified Coupled Stress Theory (MCST) is investigated. Material characteristics of the beam vary throughout the thickness according to the power distribution and are estimated though Mori–Tanaka, Hashin–Shtrikman and Voigt homogenization techniques.

13p dianmotminh02 03-05-2024 9 3   Download

The sausage feeder takes an important role in automatic packaging systems. This paper presents the theoretical calculation, kinematic characteristics of an automatic sausage feeder using vibration technique and crank mechanism. The kinematics formulation of the crank mechanism is done using vector loop method and cosine rule are applied to describe the position of the mechanisms. Velocity of crank and connecting rod is performed by differentiating the position in terms of following crank angle and connecting rod angle respectively.

7p vidoctorstrange 06-05-2023 5 3   Download

This work demonstrated the potential of US for mitigating membrane fouling. However, the integration of the US transducers within the membrane system will be a major challenge for the application of US in membrane cleaning. It is more appropriate that US is used as pre-treatment to the membrane system, the transducers can be placed prior to the coagulant feed line. Further work on the determination of the detailed mechanisms associated with enhancing coagulation would enable optimisation of the system with regard to process, cost and energy efficiency.

108p runthenight05 01-03-2023 7 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

In the course of current research the procedure of obtaining of the piecewise linear vibration systems time and frequency responses have been developed. The method is partly analytical and partly numerical and is based on combining of linear solutions of different sections in a cycle of motion. In a row with the method of obtaining of the exact steady state time and frequency response, also it is provided sensitivity analysis of the vibration isolator.

86p runthenight07 01-03-2023 10 3   Download

Detailed objectives of this study are: to analyze the risk of failure and probability of failure of existing reinforced concrete bridges qualitatively and quantitatively; to consider the effects of interactions among various deterioration parameters and among bridge components on system failure; to identify major durability related distress mechanisms of deterioration of reinforced concrete bridges and model the subsequent risk of failure of bridge system;…

163p runthenight07 01-03-2023 8 3   Download

The main aim of this study is to investigate utilising root-like architectures to improve the interfacial strength of pin-integrated hybrid composite-metal structures. Joints are critical elements in aircraft structures and require special consideration due to their vital role in the structural integrity of airframes. Although bonded and bolted systems are used commonly in engineering applications, pinning technologies have shown tremendous potential for hybrid joints.

198p runthenight04 02-02-2023 6 2   Download

The specific research objectives of this study are: 1. The development of a high throughput method for evaluation of alloys (5xxx Al as model materials in this work) subject to pitting; 2. Understanding the roles of variation in functional groups' in determining the inhibition efficiency; 3. Elucidating the inhibition mechanisms; and 4. Unveiling the role of intermetallic present in Al matrix and their contribution to the inhibition mechanism, particularly the long-term durability of the inhibitor systems.

104p runthenight04 02-02-2023 9 2   Download

The present study draws from two major bodies of literature: (1) research on leadership, which recognizes the important role of leaders in driving organizational performance and that leadership style may differ across individuals; and (2) the MCS literature, including RM concepts, in which control systems are viewed as mechanisms to “assist the organization in managing its risk and to promote effective governance processes” (Krogstad et al., 1999, p.

310p runthenight04 02-02-2023 3 2   Download

The aim of this Masters of Engineering (MEng) - Aerospace thesis was to investigate the durability of Piezoelectric Wafer Active Sensors (PWAS) for the health monitoring of composite structures. One significant challenge faced by the aviation industry is the cost and time associated with maintaining aircrafts, in particular, aging airliners. Structural Health Monitoring (SHM) is a possible approach to reduce the high cost of inspection and maintenance.

164p runthenight04 02-02-2023 11 2   Download

The nasal route for drug administration has the potential for local and systemic delivery of a wide variety of therapeutics. Nasal spray drug delivery has the potential to administer drugs to the bloodstream, avoiding the use of painful needles. While there is great potential, studies in the area are limited and somewhat conflicting. This study aimed to support the improvement of nasal drug delivery through experimental work on a model nasal cavity and through experimental characterisation of nasal spray behaviour. Four different brands of nasal spray were investigated.

91p runthenight04 02-02-2023 7 3   Download

A submarine area close to the Turkish and Greek border between the cities of Samos-Greece and Seferihisar-Turkey has been shaked on October 30, 2020 by a Mw= 6.9 earthquake. In this study, the finite source mechanism of the Samos earthquake was investigated using geodetic methods and the coseismic behavior of the earthquake was modeled. The observed coseismic displacements at 62 sites were inverted for the fault geometry and the slips. The mainshock did not generate an on-land surface rupture. However, the uniform slip modeling shows a finite source of 43.

20p tanmocphong 29-01-2022 8 1   Download

Nowadays, the need for energy is increasing more and more. It is more difficult to acquire new resources in various fields than to preserve existing energy resources. Although Turkey is a very rich state in terms of various energy resources, misuse of these resources can even lead to conflicts that may occur between the states in forthcoming years. In today’s economic conditions, we can only protect our energy resources with the correct way of management.

16p tanmocphong 29-01-2022 12 2   Download

Autophagy and DNA repair are two essential biological mechanisms that maintain cellular homeostasis. Impairment of these mechanisms was associated with several pathologies such as premature aging, neurodegenerative diseases, and cancer. Intrinsic or extrinsic stress stimuli (e.g., reactive oxygen species or ionizing radiation) cause DNA damage. As a biological stress response, autophagy is activated following insults that threaten DNA integrity.

18p thiencuuchu 27-11-2021 11 1   Download

Object and scope: Small ship diesel engines with the range of power from 50 hp to 100 hp; traditional diesel fuel with 0.05% sulfur content, ULSD with 0.001% sulfur content, and Biodiesel originated from coconut oil; fabrication of ultrasonic wave-based equipment/system to produce homogeneous fuel blend;fuel supply system, exhaust system, and control and test system of the engine; testing equipment for engine power and emissions parameters.

27p closefriend09 16-11-2021 19 5   Download