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Applied Sciences, Volume 14, Issue 21

2024 November-1 - 464 articles

Cover Story: The search for alternative, more environmentally friendly coolants to replace mineral oils in power transformers represents a relevant challenge for the power industry. In this frame, a CFD analysis is carried out by means of an open-source, conjugate heat transfer Finite Volume solver to assess the heat transfer performance of different coolants in a disc-type winding of an oil-immersed power transformer. Four different oils are considered: two mineral oils widely established among power transformer manufacturers, a synthetic ester and a natural ester. The influence of temperature-dependent thermophysical properties on the overall flow and on the location and value of the hot spots in the copper conductors is discussed, highlighting the strength and weaknesses of the four oils as transformer coolants. View this paper
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Articles (464)

  • Article
  • Open Access
1 Citations
2,369 Views
15 Pages

4 November 2024

This study presents a significant advancement in LED interior lighting through the development and application of Asymmetric Lens–Total Internal Reflection (AL–TIR) optics, with a focus on enhancing lighting uniformity and indoor comfort...

  • Article
  • Open Access
1,719 Views
19 Pages

4 November 2024

The staggered grid finite difference method has emerged as one of the most commonly used approaches in finite difference methodologies due to its high computational accuracy and stability. Inevitably, discretizing over time and space domains in finit...

  • Article
  • Open Access
1 Citations
1,367 Views
13 Pages

4 November 2024

In recent years, tunnel-boring machines (TBMs) have been widely applied in deep coal mining. Turning is an inevitable challenge in TBM tunneling, and a TBM turning roadway exhibits greater instability than a straight roadway, as engineering experienc...

  • Article
  • Open Access
1 Citations
3,748 Views
29 Pages

4 November 2024

This study investigates the evolution of online assessment practices through Moodle, a leading Learning Management System (LMS). It explores Moodle’s array of question types alongside the transformative impact of FastTest PlugIn (FTP) on educat...

  • Article
  • Open Access
1,745 Views
17 Pages

4 November 2024

Pb-contaminated soil poses inherent risks for the spread of antibiotic resistance genes (ARGs). However, few reports have investigated the distribution of lead resistance genes (LRGs), particularly their role in ARGs dynamics during Pb-contaminated s...

  • Article
  • Open Access
1 Citations
1,419 Views
16 Pages

Experimental Evaluation of Gas-Dynamic Conditions of Heat Exchange of Stationary Air Flows in Vertical Conical Diffuser

  • Leonid Plotnikov,
  • Mikhail Ershov,
  • Alexander Nikitin,
  • Vladimir Tuponogov and
  • Alexander Ryzhkov

4 November 2024

Conical diffusers are widely used in technical devices (gasifiers, turbines, combustion chambers) and technological processes (ejectors, mixers, renewable energy). The perfection of flow gas dynamics in a conical diffuser affects the intensity of hea...

  • Article
  • Open Access
1 Citations
2,833 Views
17 Pages

4 November 2024

Multi-agent reinforcement learning (MARL) has demonstrated significant potential in enabling cooperative agents. The communication protocol, which is responsible for message exchange between agents, is crucial in cooperation. However, communicative M...

  • Review
  • Open Access
1 Citations
4,390 Views
18 Pages

4 November 2024

Electrocardiographic (ECG) R-peak detection is essential for every sensor-based cardiovascular health monitoring system. To validate R-peak detectors, comparing the predicted results with reference annotations is crucial. This comparison is typically...

  • Review
  • Open Access
3 Citations
4,902 Views
22 Pages

4 November 2024

Metabolic diseases are significant diseases that affect the welfare, health, and production of small ruminant flocks raised for dairy and meat purposes. In breeding females, they mainly occur from six to eight weeks before and after parturition, resp...

  • Article
  • Open Access
1,905 Views
30 Pages

4 November 2024

Software is used in diverse settings and depends on development and testing environments. Software development should improve the reliability, quality, cost, and stability of software, making the software testing period crucial. We proposed a softwar...

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Appl. Sci. - ISSN 2076-3417