The American Society for Testing and Materials (ASTM) is an independent organization devoted to the development of standards.

American Society for Testing and Materials

The Analysis of Time Series: An Introduction, 4th edn. By C. Chatfield. ISBN 0 412 31820 2. Chapman and Hall, London, 1989. 242 pp. £13.50.

The Analysis of Time Series: An Introduction

Inflammation, fracture and bone repair

After outlining why a systematic review of research in English medium instruction (EMI) in higher education (HE) is urgently required, we briefly situate the rapidly growing EMI phenomenon in the broader field of research in which content and language have been considered and compare HE research outputs with those from other phases of education. An in-depth review of 83 studies in HE documents the growth of EMI in different geographical areas. We describe studies which have investigated university teachers’ beliefs and those of students before attempting to synthesise the evidence on whether teaching academic subjects through the medium of English as a second language (L2) is of benefit to developing English proficiency without a detrimental effect on content learning. We conclude that key stakeholders have serious concerns regarding the introduction and implementation of EMI despite sometimes recognising its inevitability. We also conclude that the research evidence to date is insufficient to assert that EMI benefits language learning nor that it is clearly detrimental to content learning. There are also insufficient studies demonstrating, through the classroom discourse, the kind of practice which may lead to beneficial outcomes. This insufficiency, we argue, is partly due to research methodology problems both at the micro and macro level.

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A Systematic Review of English Medium Instruction in Higher Education.

Aging is the progressive loss of organ and tissue function over time. Growing older is positively linked to cognitive and biological degeneration such as physical frailty, psychological impairment, and cognitive decline. Oxidative stress is considered as an imbalance between pro- and antioxidant species, which results in molecular and cellular damage. Oxidative stress plays a crucial role in the development of age-related diseases. Emerging research evidence has suggested that antioxidant can control the autoxidation by interrupting the propagation of free radicals or by inhibiting the formation of free radicals and subsequently reduce oxidative stress, improve immune function, and increase healthy longevity. Indeed, oxidation damage is highly dependent on the inherited or acquired defects in enzymes involved in the redox-mediated signaling pathways. Therefore, the role of molecules with antioxidant activity that promote healthy aging and counteract oxidative stress is worth to discuss further. Of particular interest in this article, we highlighted the molecular mechanisms of antioxidants involved in the prevention of age-related diseases. Taken together, a better understanding of the role of antioxidants involved in redox modulation of inflammation would provide a useful approach for potential interventions, and subsequently promoting healthy longevity.

/pdf/antioxidant-and-oxidative-stress-a-mutual-interplay-in-age-22zo7ofsyc.pdf

Antioxidant and Oxidative Stress: A Mutual Interplay in Age-Related Diseases

This review analyses the design, mechanical behaviors, manufacturability, and application of gradient lattice structures manufactured via metallic additive manufacturing technology. By varying the ...

https://journals.sagepub.com/doi/pdf/10.1177/1687814020916951

A review on integration of lightweight gradient lattice structures in additive manufacturing parts

Reducing cyclic testing time for components of automotive suspension system utilising the wavelet transform and the Fuzzy C-Means

Development of multiple linear regression-based models for fatigue life evaluation of automotive coil springs

Generating strain signals under consideration of road surface profiles

This study presents the development of the STFT-based fatigue data editing technique that will be used as a tool to accelerate for accelerating fatigue testing. This technique was performed by removing low amplitude cycles contained in the original signal in order to produce a shortened signal using the Short-Time Fourier Transform (STFT) parameter. The effectiveness of STFT power spectrum was validated using an SAE random fatigue data in order to indicate the relationship between STFT parameter and fatigue damage. The data was separated into two segments, i.e., damage and non-damage segments based on the 100% retention of the original fatigue damage. For the editing process, the STFT power spectrum distribution was used as the parameter to identify the damaged segment according to the power spectrum Cut-Off Level (COL). The low amplitude cycles with power spectrum lower than COL value were then removed from the original signal. Thus, a new edited signal was obtained which has retained almost 100% of the original fatigue damage and has equivalent signal statistic. The edited signal was found to be approximately 84% of the time duration of the original signal.

Shahrum Abdullah

Papers

A review on integration of lightweight gradient lattice structures in additive manufacturing parts

Reducing cyclic testing time for components of automotive suspension system utilising the wavelet transform and the Fuzzy C-Means

Development of multiple linear regression-based models for fatigue life evaluation of automotive coil springs

Generating strain signals under consideration of road surface profiles

A Study of Fatigue Data Editing using the Short-Time Fourier Transform (STFT)