Recent advances in low-cost, portable automated resuscitator systems to fight COVID-19

Photocatalysis holds great promise as an efficient and sustainable oxidation technology for application in wastewater treatment. Rapid progress developing novel materials has propelled photocatalysis to the forefront of sustainable wastewater treatments. This review presents the latest progress on applications of photocatalytic wastewater treatment. Our focus is on strategies for improving performance. Challenges and outlooks in this promising field are also discussed. We hope this review will help researchers design low-cost and high-efficiency photocatalysts for water treatment.

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A Review of Self-Coherent Optical Transceivers: Fundamental Issues, Recent Advances, and Research Directions

Applied Sciences ◽

10.3390/app11167554 ◽

2021 ◽

Vol 11 (16) ◽

pp. 7554

Author(s):

Isiaka Alimi ◽

Romil Patel ◽

Nuno Silva ◽

Chuanbowen Sun ◽

Honglin Ji ◽

...

Keyword(s):

High Speed ◽

High Performance ◽

Low Cost ◽

Dynamic Environment ◽

Digital Signal ◽

Research Directions ◽

Recent Advances ◽

Heterogeneous Nature ◽

Signal Processing Algorithms ◽

Processing Algorithms

This paper reviews recent progress on different high-speed optical short- and medium-reach transmission systems. Furthermore, a comprehensive tutorial on high-performance, low-cost, and advanced optical transceiver (TRx) paradigms is presented. In this context, recent advances in high-performance digital signal processing algorithms and innovative optoelectronic components are extensively discussed. Moreover, based on the growing increase in the dynamic environment and the heterogeneous nature of different applications and services to be supported by the systems, we discuss the reconfigurable and sliceable TRxs that can be employed. The associated technical challenges of various system algorithms are reviewed, and we proffer viable solutions to address them.

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Recent Advances in Low-Cost, Highly Efficient Bi-Functional Oxygen Electrocatalysts for High-Performance Zinc-Air Batteries

ECS Meeting Abstracts ◽

10.1149/ma2019-02/1/50 ◽

2019 ◽

Keyword(s):

High Performance ◽

Low Cost ◽

Highly Efficient ◽

Recent Advances ◽

Zinc Air Batteries

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Recent Advances in Seismocardiography

Vibration ◽

10.3390/vibration2010005 ◽

2019 ◽

Vol 2 (1) ◽

pp. 64-86 ◽

Cited By ~ 39

Author(s):

Amirtahà Taebi ◽

Brian Solar ◽

Andrew Bomar ◽

Richard Sandler ◽

Hansen Mansy

Keyword(s):

Signal Processing ◽

Low Cost ◽

Cardiac Activity ◽

Diagnostic Tools ◽

Noninvasive Evaluation ◽

Machine Learning Methods ◽

Recent Advances ◽

Signal Processing Algorithms ◽

Potential Clinical Utility

Cardiovascular disease is a major cause of death worldwide. New diagnostic tools are needed to provide early detection and intervention to reduce mortality and increase both the duration and quality of life for patients with heart disease. Seismocardiography (SCG) is a technique for noninvasive evaluation of cardiac activity. However, the complexity of SCG signals introduced challenges in SCG studies. Renewed interest in investigating the utility of SCG accelerated in recent years and benefited from new advances in low-cost lightweight sensors, and signal processing and machine learning methods. Recent studies demonstrated the potential clinical utility of SCG signals for the detection and monitoring of certain cardiovascular conditions. While some studies focused on investigating the genesis of SCG signals and their clinical applications, others focused on developing proper signal processing algorithms for noise reduction, and SCG signal feature extraction and classification. This paper reviews the recent advances in the field of SCG.

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Comparison of Emissions from Light Rail Transit and Bus Rapid Transit

Transportation Research Record Journal of the Transportation Research Board ◽

10.1177/0361198105192700104 ◽

2005 ◽

Vol 1927 (1) ◽

pp. 31-37 ◽

Cited By ~ 8

Author(s):

Christopher M. Puchalsky

Keyword(s):

Fuel Cycle ◽

Low Cost ◽

Bus Rapid Transit ◽

Light Rail ◽

Rail Transit ◽

Oxides Of Nitrogen ◽

Light Rail Transit ◽

Rapid Transit ◽

Recent Advances ◽

Plant Emissions

Bus rapid transit (BRT) is an evolving and promising transit mode that has emerged as a low-cost competitor to light rail transit (LRT) in providing medium-capacity semirapid transit. In addition, recent advances in diesel and compressed natural gas technology have caused the truism “electric rail is cleaner than diesel bus” to be revisited. A partial fuel cycle comparison of the regional or urban emissions of carbon monoxide, oxides of nitrogen, and volatile organic compounds from BRT and LRT is presented. The BRT analysis includes tailpipe exhaust emissions and fuel transportation, storage, and distribution emissions. The LRT analysis contains electric power plant emissions and line-loss-induced emissions. The analysis shows that whenever equal levels of technology are compared, LRT consistently performs better than BRT despite recent advances in the BRT mode. The analysis also shows that both modes are cleaner now than in the past.

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Recent Advances in the Development of Low-Cost Ceramic-Based Magnet Insulation

IEEE Transactions on Applied Superconductivity ◽

10.1109/tasc.2007.899271 ◽

2007 ◽

Vol 17 (2) ◽

pp. 1521-1524 ◽

Cited By ~ 3

Author(s):

M. W. Hooker ◽

K. S. Kano ◽

M. W. Stewart

Keyword(s):

Low Cost ◽

Recent Advances

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Recent advances and low cost concept for the gamma-ray lens project MAX

Experimental Astronomy ◽

10.1007/s10686-006-9044-3 ◽

2005 ◽

Vol 20 (1-3) ◽

pp. 455-464 ◽

Cited By ~ 1

Author(s):

Xavier Leyre ◽

Michel Sghedoni ◽

Francis Arbusti ◽

Primo Attina ◽

Peter von Ballmoos

Keyword(s):

Gamma Ray ◽

Low Cost ◽

Recent Advances

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Recent advances in nonbiofouling PDMS surface modification strategies applicable to microfluidic technology

TECHNOLOGY ◽

10.1142/s2339547817300013 ◽

2017 ◽

Vol 05 (01) ◽

pp. 1-12 ◽

Cited By ~ 44

Author(s):

Aslihan Gokaltun ◽

Martin L. Yarmush ◽

Ayse Asatekin ◽

O. Berk Usta

Keyword(s):

Rapid Prototyping ◽

Biomedical Applications ◽

Gas Permeability ◽

Low Cost ◽

Microfluidic Devices ◽

Mature Stage ◽

Major Drawback ◽

Pdms Surface ◽

Recent Advances ◽

Hydrophobic Recovery

In the last decade microfabrication processes including rapid prototyping techniques have advanced rapidly and achieved a fairly mature stage. These advances have encouraged and enabled the use of microfluidic devices by a wider range of users with applications in biological separations and cell and organoid cultures. Accordingly, a significant current challenge in the field is controlling biomolecular interactions at interfaces and the development of novel biomaterials to satisfy the unique needs of the biomedical applications. Poly(dimethylsiloxane) (PDMS) is one of the most widely used materials in the fabrication of microfluidic devices. The popularity of this material is the result of its low cost, simple fabrication allowing rapid prototyping, high optical transparency, and gas permeability. However, a major drawback of PDMS is its hydrophobicity and fast hydrophobic recovery after surface hydrophilization. This results in significant nonspecific adsorption of proteins as well as small hydrophobic molecules such as therapeutic drugs limiting the utility of PDMS in biomedical microfluidic circuitry. Accordingly, here, we focus on recent advances in surface molecular treatments to prevent fouling of PDMS surfaces towards improving its utility and expanding its use cases in biomedical applications.

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Recent Advances in TiO2-Based Heterojunctions for Photocatalytic CO2 Reduction With Water Oxidation: A Review

Frontiers in Chemistry ◽

10.3389/fchem.2021.637501 ◽

2021 ◽

Vol 9 ◽

Author(s):

Kai Li ◽

Chao Teng ◽

Shuang Wang ◽

Qianhao Min

Keyword(s):

Water Oxidation ◽

Rational Design ◽

Photocatalytic Performance ◽

High Efficiency ◽

Low Cost ◽

Spectral Response ◽

Co2 Reduction ◽

Environmental Crisis ◽

Ultraviolet Region ◽

Recent Advances

Photocatalytic conversion of CO2 into solar fuels has gained increasing attention due to its great potential for alleviating the energy and environmental crisis at the same time. The low-cost TiO2 with suitable band structure and high resistibility to light corrosion has proven to be very promising for photoreduction of CO2 using water as the source of electrons and protons. However, the narrow spectral response range (ultraviolet region only) as well as the rapid recombination of photo-induced electron-hole pairs within pristine TiO2 results in the low utilization of solar energy and limited photocatalytic efficiency. Besides, its low selectivity toward photoreduction products of CO2 should also be improved. Combination of TiO2 with other photoelectric active materials, such as metal oxide/sulfide semiconductors, metal nanoparticles and carbon-based nanostructures, for the construction of well-defined heterostructures can enhance the quantum efficiency significantly by promoting visible light adsorption, facilitating charge transfer and suppressing the recombination of charge carriers, resulting in the enhanced photocatalytic performance of the composite photocatalytic system. In addition, the adsorption and activation of CO2 on these heterojunctions are also promoted, therefore enhancing the turnover frequency (TOF) of CO2 molecules, so as to the improved selectivity of photoreduction products. This review focus on the recent advances of photocatalytic CO2 reduction via TiO2-based heterojunctions with water oxidation. The rational design, fabrication, photocatalytic performance and CO2 photoreduction mechanisms of typical TiO2-based heterojunctions, including semiconductor-semiconductor (S-S), semiconductor-metal (S-M), semiconductor-carbon group (S-C) and multicomponent heterojunction are reviewed and discussed. Moreover, the TiO2-based phase heterojunction and facet heterojunction are also summarized and analyzed. In the end, the current challenges and future prospects of the TiO2-based heterostructures for photoreduction of CO2 with high efficiency, even for practical application are discussed.

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