High‐Stability Control of Multizone Furnaces using Optical Fibre Thermometers

A high‐stability temperature control system for a 1500 °C multizone furnace has been developed and experimentally verified. It relies on the utilisation of optical fibre thermometers as precise temperature sensors. The strong thermal coupling between the zones requires an exact quantitative determination of the thermal exchange process. A holistic approach integrating theoretical and practical considerations has lead to a short‐term stability of less than 0.02 K at a temperature level of 1500 °C which is about one order of magnitude better than a temperature control based on thermocouples.     

Synthesising injectable molecular self-curing polymer from monomer derived from lignocellulosic oil palm empty fruit bunch biomass: A review on treating Osteoarthritis

Osteoarthritis (OA) is a chronic and irreversible degenerative joint disease that most commonly affects individuals in their forties and fifties worldwide due to the continuously increasing life expectancy. Although joint replacement is an effective remedy for severe end-stage OA, the functional outcomes could be unsatisfactory, while the implants might have a limited lifespan. Due to the drawbacks and limitations of the joint replacement approach, bone Tissue Engineering (TE) is one of the promising bone tissue regeneration technologies that aid in cartilage repair and regeneration and has attracted the attention of experts. The advanced development of biopolymers, in particular biopolymer derived from Oil Palm Empty Fruit Bunch (OPEFB), has been utilised in the fabrication of scaffolds that serve as a crucial component in bone TE. The abundant supply of OPEFB biomass and the increasing trend of converting waste into wealth for environmental sustainability have also provided the opportunity and interest to fully apply biopolymer-derived materials for bone scaffolding and other applications. Therefore, this paper aimed to provide a review of the biopolymers derived from OPEFB for the treatment of OA and other related applications. A brief overview of the biomass sources in Malaysia was presented, followed by a discussion on the chemical compositions and pre-treatment methods of OPEFB by using organosolv pre-treatment and enzymatic hydrolysis for maximum glucose recovery, monomer derived from cellulose OPEFB and synthesizing self-curing polymer scaffold. Additionally, a detailed review of the polymeric biomaterials in bone TE for the fabrication of scaffolds were included in this review. Most importantly, the paper described the potential use of injectable polymeric biomaterials that provide a significant benefit in orthopaedic applications. Overall, this paper provides a perspective on the potential of OPEFB-derived injectable scaffolds as an alternative OA treatment and future bone TE applications.     

基于声发射技术的钢丝绳断丝模式识别

基于大量实验及波形分析,给出钢丝绳断丝事件的声发射（ＡＥ）定量化表征形式．采用类内类间距离和二维图示方法综合选择ＡＥ特征,并根据其分布情况建立起基干Ｆｉｓｈｅｒ准则的分段线性分类器,以实现断丝事件的自动检测．