Musculoskeletal disorders and the stagnation of sitting are among side effects excessive in awkward positions. In this study, a developed chair attachment cushion design with an optimal air blowing technique is proposed to eliminate negative prolonged sitting. Instantaneously reducing contact area between its occupant fundamental goal design. The fuzzy multi-criteria decision-making approaches represented by FAHP FTOPSIS were integrated evaluate select An ergonomic biomechanics assessment...

The paper presents a methodology that integrates Quality-Function Deployment (QFD) and the Theory of Inventive Problem Solving (TRIZ) used for generating innovative solutions to design problems. It proposes modified analytical House Quality (HoQ) reveal prioritize contradictions between parameters customer requirements. proposed extends traditional HoQ eliminates need TRIZ’s Function Analysis (FA) procedure. involves identifying functions product or process elements trying find system...

A just-in-time (JIT)–Kanban production system with sampling inspection is considered in this paper, where the processing do not always meet requirement of quality. Under environment, characteristics and components corresponding inventory management are identified, relations interactions between these explained consequently, growth replenishment pattern finished products to customers investigated. Furthermore, JIT–Kanban formulated as a generalised Poisson queuing model both arrival rate...

Planar drag-link mechanism is a Grashofian four-bar chain with the shortest link fixed. In practice, used as coupling between two shafts to convert uniform rotation of driving shaft into nonuniform driven shaft. The nonuniformity in characterized by cyclically increasing and decreasing delay (or advance) displacement relative that Drag-link synthesis problems include synthesizing generate specified maximum delay. mechanism, longer links make full about fixed pivots, which results relatively...

Quality control and improvement at the process level is a vital activity for achievement of defect-free products in various manufacturing processes. This study employs statistical (SPC) tools such as charts capability ratio quality improvement. The employed are , R cumulative-sum (CUSUM). used so called index (PCI). These have been implemented with aid Minitab® software. In this study, gelatin capsules investigated terms capsules, which produced shipped use by drug companies. As result...

<abstract> Copper alumina (Cu-x%Al₂O₃) was prepared from micro-sized powder particles through the metallurgy (PM) process. Experimental runs were designed according to design of experiments (DOE) methodology investigate effect concentration and sintering time on hardness corrosion rate powdered composite. Four times tested (1, 2, 3, 4 h) in combination with different levels (1 wt%, 3 6 10 wt%). Given narrow range temperature for copper alumina, this fixed at 900 ℃,...

Quality control and improvement at the process level is a vital activity for achievement of quality in products services. This paper presents three-phase scheme based on statistical methodology that employs variable charts capability indices improvement. The employed are , s exponentially weighted moving average. centred ratio (Cpm) assessment. accounts both short-term long-term changes performance it designed structured less-complex implementation proposed has been implemented to...

This paper revisits a classical problem in linkage mechanism design, specifically the design of centric crank-rocker mechanisms for specified rocker stroke with unit time ratio. Beyond traditional objective minimizing transmission angle's deviation from 90 degrees, this uses another objective: maximizing shortest-to-longest link-length ratio linkage. The former ensures motion quality mechanism, while latter aims to make less sensitive variations link lengths. It is shown that these two...

This paper examines the feasibility of using friction surfacing to deposit Aluminum alloy AA6061 material over an AISI 1017 steel substrate. Further, this work aims identify deposition speed settings that would improve effectiveness process. Consumable AA6061-T6 rods were deposited at different combinations rotational and travel speeds while maintaining same axial pressing force. The experiment involved 12 with 3 replicates from each combination. Quantitative qualitative methods used...

Abstract This work aims to introduce simple-to-implement modifications the elliptical trainer device increase its utility with added new exercise options. The effectiveness of introduced was assessed on 51 subjects, representing recruitment a broader range muscle groups desired intensity levels. improvements include in-phase mode, where bilateral body synchronization creates skiing-like motion, and variable motion through adjusting stride length rotating-link mechanism. impact these by...