by Junesh Gautam  , Praneel Acharya  and Zhong Hu

Received: 15 July 2025;  Published: 24 October 2025;  doi: 10.21926/rpm.2504016

This paper investigates data-driven strain energy prediction for heterogeneous elastic materials using the Mechanical MNIST benchmark dataset (60,000 28 × 28 stiffness maps by precomputed finite-element results). The results by classical regression models (linear regression, random forest, and gradient boosting) using hand-crafted features were compared with the results by the deep learning models (Convolutional neural network (CNN) and residual network (ResNet)) trained end-to-end on images. In held-out tests, CNN [...]

by Duc Duy Huynh  , Hoang Phuc Nguyen  , Tran Quoc Thang Nguyen  , Thi Hong Nga Pham  , Quan Anh Pham  , Thi Van Anh Duong  , Van Huong Hoang  , Xuan Tien Vo  and Vinh Tien Nguyen

Received: 29 May 2025;  Published: 24 September 2025;  doi: 10.21926/rpm.2503015

Beverage bottle caps are usually made from two primary materials: PP and HDPE. In this study, the evaluation criteria were the unnotched impact toughness and the microstructure of PP/HDPE/EVA samples produced by injection molding. The samples were tested according to ASTM D256. PP/HDPE/EVA blends were prepared with various ratios: 47.5/47.5/5, 45/45/10, 42.5/42.5/15, 40/40/20, and 37.5/37.5/25. The results showed that adding EVA to the PP/HDPE blend significantly increased the unnotched impact toughness: from 84.03 [...]

by Yasmin Cherni  , Ridha Elleuch  , Cristian Botta  , Luca Cocolin  , Amjed Kallal  , Ismail Trabelsi  and Lobna Elleuch

Received: 09 November 2023;  Published: 16 September 2025;  doi: 10.21926/rpm.2503014

The sustainable management of water resources is increasingly recognized as a critical component of environmental conservation and socio-economic development. Among the most challenging aspects of wastewater treatment is the effective remediation of landfill leachate, a complex and highly polluted effluent characterized by high levels of organic matter, ammonia, turbidity, and heavy metals. This study investigates an integrated treatment approach that combines chemical coagulation using aluminum sulfate with a subs [...]

by Taofiq O. Mohammed  , Mohammad Zunaied Bin Harun  , Jian Liu  and Ebenezer O. Fanijo

Received: 04 June 2025;  Published: 04 September 2025;  doi: 10.21926/rpm.2503013

The high carbon footprint of cement production and the cost and environmental impact of steel reinforcement make conventional concrete unsustainable for long-term use. Reducing cement consumption and identifying sustainable, cost-effective alternatives to steel are critical for lowering construction’s ecological and economic burden. Bio-based supplementary cementitious materials (SCMs), such as rice husk ash (RHA), and natural plant fibers show promise, but prior studies have mostly tested them separately or with v [...]

by Mahyar Vefaghi  , Hediyeh Rezaei Sedehi  and Omid Ashkani

Received: 09 April 2025;  Published: 03 August 2025;  doi: 10.21926/rpm.2503012

Nowadays, the development of advanced processors plays a key role in the progress of humanity and the discovery of new sciences, and quantum computers play an essential role in this regard. In this regard, the development of new generation processors is necessary for the development of quantum computers. Quantum diamonds, with their astonishing properties, especially the presence of nitrogen-vacancy (NV) centers in their crystalline structure, are among the most advanced emerging technologies in the field of quantu [...]

by Kuok Ho Daniel Tang

Received: 28 February 2025;  Published: 28 July 2025;  doi: 10.21926/rpm.2503011

Plastic pollution has received worldwide attention due to its extensive environmental and health implications. The circular economy has emerged as a potential solution to plastic pollution. This overview comprehensively presents different plastic circular economy approaches and discusses their advantages, disadvantages, and implementation challenges. It highlights that the current plastic circular economy approaches primarily comprise mechanical recycling, chemical recycling, bio-based and biodegradable plastics, e [...]

by Gabriel de Souza Vieira Bié  , Zilda de Castro Silveira  , Rafael Vidal Aroca  and Marcia Cristina Branciforti

Received: 07 February 2025;  Published: 28 May 2025;  doi: 10.21926/rpm.2502010

Tissue engineering is a technique for regenerating living tissue using portions of the patient's tissue, which are dissociated into cells and cultured on biological or synthetic supports before being transferred to the patient. In this context, the present study seeks to develop implant models (scaffolds) for replacing trabecular bone tissue, with requirements such as porosity and interconnected pores. All design development was aimed at the manufacturing of scaffolds using the material extrusion additive manufactu [...]

by Obumneme Emmanuel Ezeani  , Christopher Igwe Idumah  , Ifeanyi Emmanuel Okoye  and Chioma Joan Ikebudu

Received: 13 January 2025;  Published: 27 May 2025;  doi: 10.21926/rpm.2502009

Nanotechnology has revolutionized the textile industry by introducing innovative finishing techniques that enhance the durability and performance of textile materials and the application of nanoscale/nanoparticles/nanomaterials and processes to improve the properties and performance of textiles. The synergism of textile technology and nanotechnological advancements has propelled a paradigm shift, changed the narrative, and formed novel platforms for textile surface engineering at both atomically affiliated and mole [...]

by Valeri Ligatchev

Received: 28 December 2024;  Published: 22 May 2025;  doi: 10.21926/rpm.2502008

So-called ‘Generalized Skettrup Model(s)’ (GSMs) of different (1D, 2D, 3D) spatial dimensionalities are used at simulations on temperature-dependent harmonic and anharmonic fractions of lattice thermal capacity of polyethylene and polypropylene with crystalline and/or amorphous atomic structures of limited spatial extents. Basic equations of the GSM slot in explicitly quantization effects of the single-particle and many-particle energy levels of spatially confined phonons. The harmonic lattice thermal c [...]

by A. Guillermo Bracamonte

Received: 24 November 2024;  Published: 18 February 2025;  doi: 10.21926/rpm.2501007

The generation of non-classical light with improved performances within tiny sizes, intervals of lengths, and diameters is still a challenge. The generation of variable wavelengths associated with different frequencies of energy modes produced from new sources of emitters within confined scales from the Quantum to Nano-and Micro-scales are of high impact. It is noted here that the concept of the generation of non-classical light related to electronics and photonics interactions with different topological matter con [...]