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Applied Sciences, Volume 12, Issue 16

August-2 2022 - 435 articles

Cover Story: An intercomparison study was conducted to evaluate the contributions of carboxylic acids to m/z 44 (COO+) signals obtained by an on-line aerosol mass spectrometer (AMS) during a field campaign at Cape Hedo, Okinawa, in the western North Pacific Rim. We report for the first time that carboxylic acids (diacids, oxoacids, benzoic acid, and fatty acids) significantly contribute to m/z 44 signals with a strong correlation (R = 0.93); oxalic acid accounts for 16 ± 3% of the m/z 44 signals and 3.7 ± 0.9% of organic mass measured by AMS. We also found that about half of AMS m/z 44 signals can be explained by diacids and related compounds, suggesting that the remaining signals may be derived from other organic acids including monocarboxylic acids (e.g., formate and acetate) in aerosol phase. This study confirms that AMS-derived m/z 44 can be used as a surrogate tracer of carboxylic acids. View this paper
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Articles (435)

  • Article
  • Open Access
13 Citations
5,752 Views
16 Pages

Research on Seismic Signal Analysis Based on Machine Learning

  • Xinxin Yin,
  • Feng Liu,
  • Run Cai,
  • Xiulong Yang,
  • Xiaoyue Zhang,
  • Meiling Ning and
  • Siyuan Shen

22 August 2022

In this paper, the time series classification frontier method MiniRocket was used to classify earthquakes, blasts, and background noise. From supervised to unsupervised classification, a comprehensive analysis was carried out, and finally, the superv...

  • Article
  • Open Access
11 Citations
3,247 Views
20 Pages

22 August 2022

Deep neural network (DNN), with the capacity for feature inference and nonlinear mapping, has demonstrated its effectiveness in end-to-end fault diagnosis. However, the intermediate learning process of the DNN architecture is invisible, making it an...

  • Article
  • Open Access
1 Citations
2,122 Views
14 Pages

22 August 2022

In this paper, unsteady motion tests of a lateral jet adjusting an air vehicle’s attitude are carried out. Curves of pitch moment amplification factors (KM) for a lateral jet versus angle of attack (α) are obtained using a wind tunnel fre...

  • Article
  • Open Access
7 Citations
3,368 Views
23 Pages

22 August 2022

This study investigates the visual servo control of the space station macro/micro manipulator system. The proposed approach is based on the position-based eye-in-hand visual servo (PBVS) and takes advantage of the hardware sensors to overcome the mac...

  • Article
  • Open Access
8 Citations
2,932 Views
17 Pages

Internal Curing Effect of Waste Glass Beads on High-Strength Cement Composites

  • Sujeong Pyeon,
  • Gyuyong Kim,
  • Sangsoo Lee and
  • Jeongsoo Nam

22 August 2022

High-strength concrete (HSC) uses binders and microfillers with ultrafine particles, such as silica fume. The resulting dense internal hydration structure rapidly decreases HSC humidity, causing shrinkage cracks and affecting internal hydration. Here...

  • Article
  • Open Access
4 Citations
2,627 Views
26 Pages

22 August 2022

With the development of hypersonic air-breathing propulsion systems, such as the supersonic combustion ramjet (Scramjet) and rocket-based combined cycle (RBCC) engines, the mixing process of supersonic airstream with fuel in the engine combustor has...

  • Article
  • Open Access
1 Citations
3,083 Views
13 Pages

22 August 2022

The template-based chip design method aims to build rapidly. However, it still need synthesis and simulation flows to get the performance, power, and area (PPA) reports and find the proper parameters set in the design space exploration, which takes a...

  • Article
  • Open Access
6 Citations
2,997 Views
16 Pages

22 August 2022

In this paper, the performance of a gas barrier that consisted of polyacrylamide (PAM)-modified compacted clayey soil was experimentally explored. The moisture content and water loss characteristics of the tested soils were adopted as indicative indi...

  • Article
  • Open Access
2 Citations
2,705 Views
16 Pages

Plasma-Sprayed Flexible Strain Sensor and Its Applications in Boxing Glove

  • Yongsheng Liao,
  • Yue Cheng,
  • Zhongyu Zhuang,
  • Rongjun Li,
  • Yuan Yu,
  • Ruixue Wang and
  • Zhiwei Jiao

22 August 2022

The most common and easy approach to fabricating flexible strain sensors is based on the deposition principle. To improve the design of the sensing layer pattern, the reproducibility of the process and the sensitivity of the sensor, a controllable lo...

  • Article
  • Open Access
7 Citations
4,274 Views
14 Pages

Risk Analysis of Seaport Construction Project Execution

  • Magdalena Kaup,
  • Dorota Łozowicka,
  • Karolina Baszak,
  • Wojciech Ślączka and
  • Agnieszka Kalbarczyk-Jedynak

22 August 2022

This article concerns the assessment of the level of risk at the stage of construction of a seaport, with particular emphasis on selected adverse incidents that can significantly affect the timeliness of the investment. In this article, the matrix me...

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Appl. Sci. - ISSN 2076-3417