MeThODsRecruited individuals were categorised into either the middle-aged (age 45-59 years, n = 60) or elderly ≥ 60 group.Data on demographics, anthropometry, as well external and internal barriers to participation in physical activity exercise collected. ResUlTsAnalysis showed no significant differences total scores of all between two groups (p > 0.05).The for most also 0.05); only 'cost' 0.045) 'exercise interferes with social/family activities' 0.011) differences.The common among...

In a view to reduce the cost of production and harmful destruction in normal environment, there's lot research have been conducted or still ongoing for possibility using natural fibers which are wholly degradable combination biodegradable thermoplastic materials. This will focus on Kenaf; an extremely valuable fiber with robust mechanical properties. this research, kenaf fiber/fiberglass reinforced unsaturated polyester composites were subjected water absorption test. Water test by immersing...

Water absorption of natural fiber composite is serious concerned especially for outdoor application. In this study, long kenaf/woven glass hybrid fabricated in-house using cold press technique. The effect water on the composites investigated at room temperature under three different environmental conditions, i.e. distilled water, rain and sea water. moisture amount obtained by calculating percentage weight before after immersion process. content found to exhibit non-Fickian behaviour...

Ammonium perchlorate (AP) stands out as the predominant oxidizer in solid rocket propulsion systems, while sorbitol, frequently employed a fuel sounding rockets, is expected to generate non-hazardous gases during combustion. This study reports on effect of sorbitol potential organic green addition additive metals heat combustion, thermal properties and specific impulse for ammonium based propellant. The was measured using PROPEP 3.0 (Propellant evaluation program). Solid propellant...

Ammonium perchlorate (AP) stands out as the predominant oxidizer in solid rocket propulsion systems, while sorbitol, frequently employed a fuel sounding rockets, is expected to generate non-hazardous gases during combustion. This study reports on effect of sorbitol potential organic green addition additive metals heat combustion, thermal properties and specific impulse for ammonium based propellant. The was measured using PROPEP 3.0 (Propellant evaluation program). Solid propellant...

This paper presents an experimental investigation on the specific wear rate between Kenaf Polyester Composite (KPEC) and Epoxy (KEC). The raw material used in present work was long kenaf fiber. epoxy resin unsaturated polyester were mixed with hardener at weight ratios of 3:1 10:1, respectively. test carried out using Abrasion Resistance Tester (TR-600) dry sliding conditions a constant velocity 1.4 m/s. conducted room temperature different applied loads ranging from 5 30N. It observed that...

Drilling induced in fibre reinforced polymer resulted high rate of parts rejection and thus affects the in-service performance composite product. Therefore, tensile testing hybrid with drilled holes is necessary to render them satisfaction industrial application. The objective present research develop long kenaf composites kenaf/woven glass polyester resin composites. properties those were investigated. measurements taken from residual strength impacted specimens open hole specimens. From...

Over the past two decades, nanoparticle materials have been subject of enormous interest. These get their name from extreme small particle size microstructure. By changing into nanosize, it is an effective way to enhance mechanical and physical behavior materials. The corrosion resistance in aqueous solutions also great importance assessing a wide range potential applications such as steam generator tubes components, etc. In this paper, Co-Ni-Fe nanoparticles were coated on stainless steel...

Natural fibres have emerged as the potential reinforcement material for composites and thus gained an attraction by many researchers. This is mainly due to their applicable benefits they are light weight offer low cost compared synthetic fibre composites. Kenaf recently been a substitute in weight-critical applications areas such aerospace, automotive other high demanding industrial sectors. In this study, natural kenaf kenaf/fibreglass hybrid were fabricated combination of hand lay-up...

Using the electrodeposition process, cobalt‐iron (Co‐Fe) nanocrystalline coatings were successfully synthesized onto stainless steel in deposition times of 30, 60, and 90 minutes. The temperature used throughout process was 50°C an acidic environment pH 3. By changing time, physical properties such as phase crystallographic structure, surface morphology, grain size, microhardness, magnetic Co‐Fe examined. FESEM micrographs showed that sizes range from 57.9 nm to 70.2 nm. Dendrite irregular...

Kenaf fibres recently have been a substitute material in many weight-critical applications such as aerospace, automotive and other industrial sectors. Their characteristics, low densities, specific strength modulus are considered superior to those of metallic materials. The tensile velocity impact kenaf composites kenaf/fibreglass were investigated. findings revealed that the properties seriously impaired even when energy was used. As for hybrid composites, hardly affected tested with below...

The investigation was intended to optimize tri-objective of the welding parameters on tensile-shear (TS) strength, Fusion Zone (FZ) size and Heat Affected (HAZ) development in resistance spot (RSW) process similar sheet metals joint. experimental studies were conducted varying weld time, electrode force current for 1.2mm thickness low carbon steel. tests, according settings carried out L9 Taguchi orthogonal array randomized way. optimum parameter obtained using multi signal noise ratio...

The widely use of synthetic materials like carbon and fiberglass in various industries such as automotive aircraft has lead to human health environment problems. Therefore, the natural fibres kenaf received higher attention reinforcement. Kenaf or scientific name is Hibiscus Cannabinus. L one group Malvecea plant which early days, application served only rope canvas. However, it more advantages than as; availaible, renewable, lightweight, non-abbrasiveness during processing, high specific...

Titanium and stainless steel have become attractive materials especially in medical applications due to their improvement of implant performance longevity. The corrosion behaviour for 316L (316L SS) Ti-6Al-4V under simulated biological conditions with the presence proteins were investigated using electrochemical methods. tests performed addition bovine serum albumin (BSA) concentrations 2%, 4%, 6%, 8% 10% at 37°C. methods used this study open circuit potential (OCP), potentiodynamics...

Plastic recycling can be an effective way of reducing large amount plastic waste in manufacturing industry. Polypropylene (PP) is a versatile material that capable numerous commercial applications. This study about the effect composition between virgin and recycled PP towards their mechanical properties. The blending product was investigated whether it improve performance without deteriorating its original tensile flexural tests were conducted according to ASTM D638 D790, respectively....

Composite has been created to improve the mechanical characteristics in natural fibres such as stiffness, toughness and impact resistant. This research investigated tensile properties low velocity behaviour of long kenaf with two different thermoset polymer resins (epoxy polyester). The kenaf/epoxy kenaf/polyester composite were studied by experiment using Instron Universal Testing Machine according standard ASTM D638. Tensile testing was carried out fibre weight percentages (10, 15, 20...

Purpose The purpose of this study is to determine the effect current density on surface roughness and corrosion performance electrodeposited Co–Ni–Fe-coated mild steel. Process variables are key factor in controlling electrodeposition process. It important processing parameter optimize mechanical resistance coating substrate. Design/methodology/approach A low-cost method was used synthesize Co–Ni–Fe steel In electrodeposition, electrochemistry concept applied. temperature process controlled...

This study was intended to optimize the resistance Spot Welding Parameters (RSW) of sheet metals joints. The variation parameters selected were electrode force, welding current and time 1.2 mm thickness low carbon steel. settings process conducted according L9 Taguchi orthogonal array in randomized way. optimum parameter then obtained by using signal noise ratio analyzed further on significant level Analysis Variance (ANOVA). developed response has been found well fitted can be effectively...

This paper discusses the mechanical properties of woven kenaf/fiberglass hybrid composites which has been fabricating using vacuum bag technique. Kenaf fiber had chosen among others natural fibres due to its excellent and potential raw replace plastic or tobacco in manufacturing a multitude products for construction, automotive, textile advanced technology sectors. study investigates post impact tensile kenaf surface fractured. The energy used consists 4J, 6J, 8J, 12J 16J. specimens were...

This study is about the hybrid composite which used woven Kevlar, long Kenaf fibre, and unsaturated polyester as matrix. It focused on mechanical characterization properties of composite. The composites were fabricated by treated untreated kenaf fibre Kevlar reinforcement in matrix using hand lay-up process. Effect 6wt% sodium hydroxide (NaOH) analyzed X-ray Diffraction (XRD) Fourier Transform Infrared Spectroscopy (FTIR) analysis. tensile impact performance samples tested according to...

Composites are expensive and destructive test methods normally applied to determine their physical mechanical properties. For textile composites, a nondestructive (NDT) could save time cost if the properties such as moisture content, weave architecture, void content fiber volume fraction can be deduced from electrical Also, there would savings tensile stress elastic modulus determined by NDT methods. In this research, microwave (MNDT) techniques measurement of complex permittivities used for...

AbstractAbstractIn this paper, the authors report effect of nanosize MgO particles addition on superconducting and transport critical current density J c TlSr1212 superconductors prepared from Tl0·9Bi0·1Sr1·95Ta0·05Ca0·9Y0·1Cu2O7 starting composition using conventional solid state synthesis. X-ray diffraction analyses Tl0·9Bi0·1Sr1·95Ta0·05Ca0·9Y0·1Cu2O7+xMgO (x=0 to 0·8 wt-%) showed formation dominant 1212 phase (>90 vol.-%) together with minor 1201 phases. Undoped TlSr1212(x=0) was...

The corrosion behaviour for stainless steel 316L and Ti-6Al-4V at pH 5.2 7.4 under simulated biological conditions either with or without the presence of proteins were investigated using electrochemical methods. tests performed addition bovine serum albumin (BSA) withconcentration 10 g L-1 to phosphate buffer solution (PBS) two different phases pH, which areacidic (pH 5.2) neutral phase 7.4) 37 °C. methods used in this study open circuit potential (OCP) potentiodynamics polarization. results...