Effect Of Different Weights Research Articles

Effect of Different Weight on the Movable PZT Device on the Damage Detection Performance of Electromechanical Impedance Technique

This study presents a novel approach to conducting the electromechanical impedance (EMI) technique for delamination detection in composite structures without the need for permanently attaching PZT (Lead Zirconate Titanate) transducers to the surface. Instead, a device is created that can be simply placed on top of the composite structure, enabling one to perform the EMI technique for detecting damage. The primary objective is to investigate the effectiveness of this device in detecting delamination within composite materials. Additionally, this study explores the impact of placing additional weight on top of the transducer to investigate the performance of the device subjected to higher pressure. Experimental results and analysis will be presented to evaluate the feasibility and reliability of this approach for non-destructive testing and structural health monitoring of composite components. This research is significant as it lays the groundwork for developing automated damage detection systems using robotics in the near future. By demonstrating the proposed concept that can be easily integrated into robotic platforms, this study contributes to the advancement of automation in structural health monitoring. Implementing this technique in robotic systems has the potential to revolutionize maintenance practices by enabling continuous, real-time monitoring of composite structures, enhancing safety, and minimizing downtime due to structural defects. Moreover, the investigation into the impact of additional weight on the transducer’s performance is crucial for setting minimum weight limits in robotic systems, ensuring optimal functionality and accuracy during automated damage detection tasks.

PENGARUH PERBANDINGAN BERAT DAN TIGA MEDIA YANG BERBEDA TERHADAP LAJU PERTUMBUHAN INFUSORIA (PARAMECIUM SP) SEBAGAI PAKAN ALAMI LARVA IKAN

The purpose of this study was to determine the effect of different weights and media on the growth rate of Infusoria (Paramecium sp). The method used in this study is an experimental method using a completely randomized design (CRD). The results of the Variety Sidik Analysis (ANASRA) showed that the growth of Infusoria (Paramecium sp) in each treatment was significantly and very significantly different (Significant) where F count > F table 5% (5.795 > 3.68) and (8.765 > 3.68 ), means that the growth rate of Infusoria (Paramecium sp) is different in each treatment or experiment. The highest cell division was on day V (five) with 5,160 cell divisions and an average of 1,720 cells in the A2B1 treatment and the lowest division occurred on day IX (nine), namely 40 cells with an average of 13.4 cells in treatment A1B3. Further test results using the Least Significant Difference (LSD) test showed a significant (significant) difference in the A2B1 and A2B3 treatments (3,563 > 2,940.452), whereas in the A2B1 and A2B2 treatments (2,563,333 < 2,940,452), A2B2 with A2B3 (1000 < 2940.452), A1B1 with A1B2 (2320 < 2940.452), A1B1 with A1B3 (2780 < 2940.452) and A1B2 with A1B3 (460 < 2940.452) this shows no significant difference (non significant

A method of automatically obtaining master surfaces of resin matrix composites by time–temperature superposition

AbstractThe time–temperature superposition (TTS) is a data processing method of viscoelastic mechanics, which is realized by translating and superposing the responses at different temperatures to get master curves beyond the test time or frequency. In this study, an automatic shift method is developed to obtain master surfaces of the carbon fiber reinforced plastics and epoxy resin. First step, an interpolation is used to process the dynamic mechanical analysis test data measured by frequency sweep/temperature step or continuous heating‐up method. Second step, the Prony series of the generalized Maxwell model are used to fit the storage and loss modulus at each temperature, which makes the fitting curves have physical meaning and causality. Third step, the automatic shift is achieved by minimizing the sum of squares of the vertical distances between two fitting curves. Last step, master surfaces are created by Prony series fitting and interpolation, and the storage modulus, loss modulus, loss factors, and relaxation modulus at any temperature, frequency or time can be found on the master surfaces. Both storage modulus and loss modulus are considered at same time according to the weight. The effects of different weights are studied.

Experimental analysis on single slope solar still by the inclusion of Agar-Agar (Eucheuma) Fibre and micro Phase Change Material for the productivity enhancement

The freshwater ecosystem connects humans with resources for a healthy life. One of the most typical problems confronted by living beings is the scarcity of fresh water. The clean water shortages can be alleviated by converting seawater to potable water using solar still. The limitation of solar still is its lower productivity. The main aim of this work is to enhance the productivity of single slope solar still by the inclusion of the best weight of naturally available agar-agar fibre in the absorber basin and best weight% of micro-Phase Change Material under the absorber basin. In this regard, the effect of different weights of agar-agar fibres such as 5, 10, 20, 30 and 40 g in the absorber basin was experimentally investigated. The solar still with 10 g of agar fibres in the absorber enhanced the productivity by 26.24% whereas, for 5, 20, 30 and 40 g was 16.21%, 23.14%, 21.53% and 5.15% respectively. The effect of different weight% of agar-agar powder such as 5, 10, 15 and 20 wt% in paraffin wax was investigated. The paraffin wax with 20 wt% of agar-agar powder has a better thermal conductivity of 0.34 W/mK. Furthermore, the experiment has been carried out with 10 g of agar fibre in the absorber, 20 wt% micro-Phase Change Material bed under the absorber basin solar still (PCMAAF-SS) and Conventional Solar Still (CSS). From the experimentation, it was found that the overall yield of PCMAAF-SS was 4380 mL/m2-day on day 1 and 3950 mL/m2-day on day 2, for CSS it was 3030 mL/m2-day on day 1 and 2800 mL/m2-day on day 2 respectively. The thermal efficiency of PCMAAF-SS was 40% on day 1 and 36.78% on day 2 whereas the thermal efficiency of CSS was 27.68% and 26.07% on day 1 and day 2 respectively. The thermal efficiency of PCMAAF-SS was increased by 44% on day 1 and 38.08% on day 2 relative to CSS. The economic analysis revealed that the Cost per Litre and Payback period of PCMAAF-SS were $ 0.054 and 4.8 months at the same time for CSS, it was $ 0.058 and 5.1 months. From the environmental analysis, it was found that the carbon credit gained from PCMAAF-SS and CSS were $ 194.6 and $ 133.5 respectively.

Control strategies of an SIVS network model with two vaccinations

Understanding effectiveness of control policies can be helpful to prevent and control diseases. In this paper, we evaluate effects of control strategies containing two vaccinations, which are given to the newly born and the susceptible individuals. An SIVS epidemic model with two degree-dependent vaccination rates on scale-free networks is developed. We argue the effects of the vaccinations on the basic reproduction number R0. And spatial immunity and time-varying optimal vaccination schemes are performed. Particularly, we discuss effects of different weights in the objective function on disease control. We find that, two vaccinations can give rise to decreasing of R0; especially for R0>1, the effect of the booster vaccination is larger than that of the primary. Thus, strengthening the booster vaccination, or enlarging costs for the infected individuals and the booster vaccination, or reducing costs for the primary vaccination can be beneficial to stop and control diseases more effectively. These results can provide a new insight into controlling infectious disease on networks.

Statistical Study on Additives Used to Improve Mechanical Properties of Polypropylene.

Polypropylene (PP) is a semi-crystalline polymer that is brittle under severe conditions. To meet industry needs, and to increase the applications of polypropylene, its mechanical properties should be improved. In this research, the mechanical properties of polypropylene, such as tensile strength at break, tensile strength at yield, % elongation, and Young’s modulus, were improved using two types of additives. Additives used were calcium carbonate master batch filler composed of 80% calcium carbonate and 20% polyethylene, and a mixture of linear low-density polyethylene (LLDPE)/low density polyethylene (LDPE). Results showed that both tensile strength at break, and tensile strength at yield, decrease with increasing the amount of both additives. Percentage elongation of PP increased using both additives. The modulus of elasticity of PP increases by increasing the amount of both additives, until a value of 20 wt%. Analysis of variance (ANOVA test) or (F-test) shows significant differences between the effect of different weights of LLDPE/LDPE mixture and calcium carbonate filler on the four mechanical properties of polypropylene studied at a level of 0.05. T-tests are applied to compare between the effect of both calcium carbonate master batch filler and the mixture LLDPE/LDPE on the four mechanical properties of polypropylene studied. T-tests show no significant differences between the effect of both calcium carbonate master batch filler and the mixture LLDPE/LDPE on all mechanical properties of polypropylene studied at a level of 0.05.

Magnetic susceptibility and frequency dependence ac conductivity of PPY/PANI/V2O5 nanosheets

The conducting copolymer (CCP) Polypyrrole (PPY)/ Polyaniline (PANI) and polycrystalline conducting copolymer nanocomposites (CCPNCs) PPY/PANI/V2O5 were synthesized by in situ chemical oxidative polymerization with nano-particles (NPs) V2O5 using FeCl3 as an oxidant and HCl as dopant by keeping different molar weight percent of V2O5 with pyrrole and aniline. The chemical structures of prepared PPY, PANI, PPY/PANI, V2O5 and CCPNCs are characterized by Fourier transform infrared (FT-IR) spectroscopy and X-ray diffraction (XRD) techniques. Scanning electron microscopy (SEM) were used to characterize the surface morphologies of the PPY, PANI, NPs and the CCPNCs shows some nanosheets having thickness about 28 nm. The grains are highly agglomerated and well interconnected with each other. XRD patterns of the CPNCs shows significant effect of change in weight % of additives V2O5 on polycrystalline structure and shows variation in crystallinity. FTIR reveals the broad absorption bands in the range 1100 – 1150 cm−1, which confirms the formation of polymers and absorption bands in the lower frequency regions (750 to 400 cm−1) confirm the existence of MO groups in the hybrids. Magnetic susceptibility increases as increase in magnetic field shows paramagnetic behaviour of CP, CCP and CCPNCs powder at room temperature studied by Gouy’s method. A gradual increment in ac conductivity of CP and CCP were observed with increase in frequency and with increase in temperature, revealing its semi-conducting behaviour. CCPNCs pellets also demonstrated a similar trend with increase in conductivity is the effect of different weight % of additive studied by computer control High Resolution Dielectric Analyser.

Does the weight of basketball shoes affect speed and jumping performance?

Purpose: The objective of this study was to analyze the effect of different weights of basketball shoes on speed and jumping performance in male basketball players. Methods: 20 male basketball players in two groups, as eyes open (n:10) and eyes closed (n:10) participated in the study. The two groups performed vertical jump (VJ) and 10m sprint tests with three different weights of shoes (light, 352g; medium, 510g; heavy, 637g). The data were analyzed with Friedman repeated measurements variance analysis. Results: In Vertical Jump test, jumping performance of the eyes open group (EOG) with light shoes was found to be statistically higher as 1.8% and 2.1%, respectively when compared with medium and heavy shoes (p< 0.001). In eyes closed group (ECG), no statistically significant difference was found between any of the 3 shoe weights in vertical jump performance (p>0.005). In 10 meter (m) sprint test, 10 m sprint time of the eyes open group was found to be statistically better as 0.5% and 1.6%, respectively when compared with medium and heavy shoe performance (p<0.001). Medium weight shoe was found to be 1.2% statistically better than heavy shoes (p<0.001). In eyes closed group, light shoes affected 10m sprint performance statistically better with 1% when compared with heavy shoes (p<0.001). Conclusions: Wearing light shoes in basketball has 2.1% and 1.6% positive effect on jumping and sprint performance, respectively. It can increase basketball players’ performance. Choosing light shoes will help provide both psychological and physical advantages.

Dual-Objective Program and Scatter Search for the Optimization of Disassembly Sequences Subject to Multiresource Constraints

The effective dismantling of discarded products regardless being used or not is critically important to their reuse, recovery, and recycling. However, the existing product disassembly planning methods pay little or no attention to resource constraints, e.g., limited numbers of disassembly operators and tools. Thus, a resulting plan when being executed may be ineffective in practice. This paper presents a dual-objective optimization model for selective disassembly sequences by considering multiresource constraints such that disassembly profit is maximized and time is minimized. A scatter search is adopted to solve the proposed dual-objective optimization model. It embodies the generation of diverse initial solutions, global assessment of objective functions, a crossover combination operator, a local search strategy for improved solutions, and a reference set update method. To analyze the effect of different weights on its performance, simulations are conducted on different products. Its effectiveness is verified by comparing its optimization results and those of genetic local search. Note to Practitioners —This work deals with a sequence modeling and planning problem of product disassembly. It establishes a novel dual-objective optimization model for product disassembly subject to multiresource constraints. Previously, such a problem is handled through a methodology based on the optimization of a single objective, i.e., disassembly time or cost. The resultant solution is insufficient without fully considering disassembly resources, e.g., labors and tools. Also, in an actual disassembly process, a decision-maker may want to maximize disassembly profit, as well as minimize disassembly time. This work considers both objectives and proposes scatter search to solve disassembly problems. The results demonstrate that the proposed approach can solve them effectively. The obtained solutions give decision makers some desired choices to select a right disassembly process when an actual product is disassembled.

A weighted sparse neighbor representation based on Gaussian kernel function to face recognition

Currently, sparse representation was widely used in face recognition. However, traditional sparse representation method cannot effectively consider the effect of different weight of training samples When reconstruct the test samples. In this paper, a weighted sparse neighbor representation based on Gaussian kernel function model is presented to resolve above problems. Firstly, K nearest training samples is selected for constructing a new training dictionary according to the Euclidean distances between the test samples and training samples. Then, a weight is given to each sparse coefficient of new training sample. Above sparse coefficient is solved by norm L1 minimization method. Finally, recognition task is performed by the minimum reconstruction error of sparse coefficient. Experimental results illustrate that, the proposed algorithm achieves 96.64% correct recognition rate, which is significantly higher than the various existing comparison methods.

Catalytic steam methane reforming enhanced by CO2 capture on CaO based bi-functional compounds

Sorption enhanced steam methane reforming (SE-SMR) was performed to maximize hydrogen production and contemporary remove CO2 from the product stream using bi-functional sorbent-catalyst compounds. Samples were tested at two different scales: micro and laboratory. The CaO amount varied in the CaO–Ca12Al14O33 sorbent system synthesized by wet mixing (CaO content of 100 wt%, 56 wt%, 30 wt%, or 0 wt% and balance of Ca12Al14O33) which were upgraded to bi-functional compounds by impregnation of 3 wt% of Ni. Nitrogen adsorption (BET/BJH), X-Ray Diffraction (XRD), Temperature-Programmed Reduction (TPR) and Scanning and Transmission Electronic Microscopy (SEM and TEM, respectively) analyses were performed to characterize structural and textural properties and reducibility of the bi-functional materials and evaluate their catalytic behavior. A fixed sorbent composition CaO–Ca12Al14O33 (56 wt% of CaO and Ca12Al14O33 balance), was chosen to study the effect of different weight hourly space times (WHST) and CH4 stream compositions in SE-SMR activity. Impregnated mayenite at both micro and laboratory scales showed stable H2 content of almost 74%, with CH4 conversion of 72% similarly to the values reported by the sample containing 30 wt% of CaO in the post-breakthrough.Sample with 30 wt% of CaO showed promisingly behavior, enhancing H2 content up to almost 94.5%. When the sorption enhanced reaction is performed roughly 89% of CH4 conversion is achieved, and after the pre-breakthrough, the catalyst worked at the thermodynamic level. During cycling sorption/regeneration experiments, even if CO2 removal efficiency slightly decreases, CH4 conversion and H2 yield remain stable.

Effects of different weights and lifting postures on balance control following repetitive lifting tasks in construction workers

PurposeRepetitive lifting tasks have detrimental effects upon balance control and may contribute toward fall injuries, yet despite this causal linkage, risk factors involved remain elusive. The purpose of this paper is to evaluate the effects of different weights and lifting postures on balance control using simulated repetitive lifting tasks.Design/methodology/approachIn total, 20 healthy male participants underwent balance control assessments before and immediately after a fatiguing repetitive lifting tasks using three different weights in a stoop (ten participants) or a squat (ten participants) lifting posture. Balance control assessments required participants to stand still on a force plate with or without a foam (which simulated an unstable surface) while center of pressure (CoP) displacement parameters on the force plate was measured.FindingsResults reveal that: increased weight (but not lifting posture) significantly increases CoP parameters; stoop and squat lifting postures performed until subjective fatigue induce a similar increase in CoP parameters; and fatigue adversely effected the participant’s balance control on an unstable surface vis-à-vis a stable surface. Findings suggest that repetitive lifting of heavier weights would significantly jeopardize individuals’ balance control on unstable supporting surfaces, which may heighten the risk of falls.Originality/valueThis research offers an entirely new and novel approach to measuring the impact that different lifting weights and postures may have upon worker stability and consequential fall incidents that may arise.

Influence of tuber weight and cutting on growth and yield of safed musli (Chlorophytum borivilianum)

ABSTRACTThe present study was aimed to investigate the effect of different weight of planting material and cutting on safed musli cultivation. Tubers were divided into three weight categories (3, 6 and 9 g bulk−1) and were either planted as whole or cut tubers. The plant growth and development were recorded at 60, 90 and 120 days after sprouting (DAS). The results showed that both factors had no interaction for all parameters measured. The sprouting percentage was not significantly different in all the treatments. The weight of planting materials used in the treatments had no influence on the overall plant growth and development. However, there was a significant difference observed between whole tuber and cut tuber treatments. At 90 DAS, tubers subjected to cutting encouraged the plants to produce the higher number of leaves (22.7) with improved total leaf area (642 cm2), fibrous root length (2795 cm) and tuber dry weight (7.8 g). The same pattern was observed at 120 DAS where the cut tubers produced the higher number of tubers (20.7) with increased length (8.6 cm) and diameter (6.6 mm). Consequently, these factors resulted in higher yield, 15.7 as compared to 13.6 g bulk−1 in non-cut treatment.

Effect of the added weight on the rear wheels and inflating pressure in agricultural Tractor type (New Holland 2WD) on the performance of Mold Board Plow in terms of some mechanical and physical properties of the soil

Experiment was conducted in one fields of Agricultural Sciences College in Sulaymaniyah University with Silty-clay soil in order to study the effect of different weights added to the rear wheels for agricultural tractor type New Holland 2WD, with the effect of pressure bloating of rear wheels on the performance of triple Mold Board in terms of some properties represented by: The amount of fuel consumption, plowing practical speed, Slippage percent, soil penetration resistance, covered soil volume, number of clods which have a diameter more than 10 cm. Split- plot design used in this research under randomized complete block design RCBD, where added weights factor on rear wheels wear put in the main plots represented by two levels which are without weights and added weights by 100 kg per each rear wheel, While bloating pressure factor of the wheels has been developed in sub plots by three levels included 80, 100 and 120 Kpa. The results showed that the added weight had a significant effect on all studded properties except of fuel consumed amount. While bloating pressure factor of the wheels was significantly difference in the level 80 Kpa on 100 Kpa level, which in turn significantly differs on the third level 120 Kpa in all studied properties. As to the interaction between the factors, the weights 200 kg factor with bulging pressure wheels 80Kpa recorded best significant effect on the rest of interactions in all studded properties except in fuel consumed property which the differences between the factors was In favor for the factor without weights with the bulging pressure wheels 80 Kpa, as the results showed that there is no significant differences between number of interactions for all studded properties in the experiment except soil penetration resistance property, where was significant differences between its levels.

Electromyographic analysis according to shoe weight during ambulation

Objective: To examine the effects of different shoe weights on lower leg muscle fatigue when walking by electromyographic (EMG) analysis due to the most effective weight for loading not being established. Design: Cross-sectional study. Methods: Thirty healthy university students (15 male, 15 female) were enrolled and randomly assigned into three conditions, which included wearing athletic shoes with an addition of 300 g, 500 g, and 1,000 g weights respectively. Prior to walking, all subjects were instructed to sit in a chair for 10 minutes. All subjects walked at a speed of 3.6 m/s on a treadmill for 20 minutes without rest. EMG measurements were taken using the median power frequency to assess for the effect of the different weight of shoes on muscle fatigue of the soleus, gastrocnemius, and tibialis anterior while walking on a treadmill in an upright posture. EMG measurements were taken during the first and last 30 seconds of walking. Results: In terms of muscle fatigue, for the soleus, the median power frequency was significantly lower with 1,000 g compared with 300 g and 500 g (p

Comparison of actuator placement criteria for control of structures

The performance of a controlled system depends on the location of the control actuator, in addition to the controller itself. Thus actuator placement is part of controller design for these systems. In this paper, a number of different actuator placement criteria are compared in the context of controlling vibrations on a simply supported beam. Maximizing a measure of the controllability is very common actuator placement criteria. It is shown here that this approach yields predictions that depend on the order of the model used for the calculations. Furthermore, this criteria does not always lead to locations that also minimize the control objective. The control objectives considered here are the minimization of linear-quadratic, H2 and H∞ costs. The effect of different weights in the linear-quadratic, H2 and H∞ cost functions on the optimal actuator location is also examined. The control signal is calculated for a number of different cases. Linear-quadratic, H2 or H∞ optimal location of the actuator typically leads to better performance with control effort comparable to that at sub-optimal points.

Effect of Weight and an Increased Workload on Heart Rate and Blood Pressure

Previous studies have shown that personal protective equipment (PPE) is responsible for increases in heart rate (HR) and VO2max response in firefighters (FF), but has not been examined in collegiate lacrosse players. We have found that FF have exaggerated blood pressure (BP) responses to a treadmill test, and during recovery when wearing PPE (data unpublished). PURPOSE: To compare the effects of weight and an increased workload on BP and HR, between FF and lacrosse players. METHODS: Division III lacrosse players (5M, 20.4 ±0.5yrs) and volunteer firefighters (5M, 21.8 ±2.2yrs) who were matched by body size (FF BMI 26.9 ±3.7kg/m2; lacrosse BMI 26.3 ±3.5 kg/m2, p=0.79) came to the lab for two visits within two weeks for two symptom-limited maximal treadmill tests. The first treadmill test (Regular) was completed following Bruce Protocol in normal clothing; ECG, BP, and HR were continuously monitored. The second treadmill test (PPE) was completed following Bruce Protocol while participant was wearing full gear or PPE; BP and HR were monitored. Changes in HR and BP were compared within groups. RESULTS: Between FF and lacrosse players, gear weight (FF 54.2±4.5 lbs.; lacrosse 6.1±2.1 lbs.), reported number of times exercise/week (FF 1.8±1.5; lacrosse 5.2±0.4), Regular HRmax (FF 230.2 ±31.0 bpm; lacrosse 190.4 ±9.2 bpm), and Regular VO2max (FF 40.2±8.0 ml/kg/min; lacrosse 50.4±4.7 ml/kg/min) were different between groups (p<0.05 for all). For lacrosse players, there were no differences in the BP at each stage or HR at each minute - in Regular compared to PPE. However, for the FF there was a difference in the stage systolic BP and minute HR - in Regular compared to PPE (p<0.05 for all). CONCLUSION: Division III lacrosse players are not affected by the weight of their gear in the same way as FF. Future research should be done to verify the effect of different weights of gear and an increased workload on HR and BP responses.

A protocol for evaluating the sustainability of agri-food production systems—A case study on potato production in peri-urban agriculture in The Netherlands

Frameworks describing the overall assessment of sustainability are limited and usually not well described. This study proposes a protocol for the selection and quantification of indicators that can be used to discuss and communicate the sustainability of agri-food production systems. A gross list of indicators was established covering the social, environmental and economic dimensions. Core indicators were selected from this gross list using predefined criteria. Then, sustainability limits were set for these core indicators to evaluate their sustainability impact. Policy makers can determine the effects of different weights and the extent to which indicators can compensate each other (compensability) either at the level of the individual indicator or on the overall sustainability. The protocol was tested in a case study comparing potato production in peri-urban agriculture to conventional and to organic agriculture. Data were based on literature, expert opinion and additional calculations. Application in the case study showed that the protocol can be a valuable tool in assessing the sustainability of agri-food production systems. It enables more transparent policy decisions and facilitates communication with stakeholders about these decisions.

Optimal Offline Cycle Length Model Based on Online Bus Priority Demand

Cycle is one of the most important parameters of traffic control system which has many effects on the delay of buses. The basic requirement of bus signal priority is to decrease bus delay at intersections. First, the optimal cycle length model under the condition of bus signal priority is built by giving different weight to vehicles and buses. Then, a four-phase signal controlled intersection which has an exclusive bus lane is adopted to validate the optimal cycle length model and analyze the effects of different weight. The results show that the optimal cycle for buses and vehicles is not equal. And the weighted optimal cycle length model can make a trade-off between buses and vehicles. Finally, the appropriate on-line increment of cycle can further reduce the delay of buses and would not affect the non-priority vehicles.

Effect of different sizes of planting material on the growth and yield components of edible mushroom &lt;i&gt;Pleurotus tuberregium&lt;/i&gt;

An experiment was conducted in 2004 and 2005 at the University of Uyo Teaching and Research Farm to assess the effect of different weights of planting materials on the performance and yield components of ediblemushroom Pleurotus tuberregium. The experiment was laid out in Randomized complete block design with three weights (20g, 40g and 60g) as treatments and replicated five times. Each plot size measured 1m x 1m with a total of 16 polybags per plot. Parameters studied were percent emergence, cap diameter, stipe height and girth as well as number of shoots. Results obtained showed no significance (P&lt;0.05) in percent emergence amongst the weights of planting materials. However, a significant (P&lt;0.05) effect was recorded in cap diameter (3.68cm) from the 20g weight planting material. Stipe height and girth did not show any significant difference amongst the treatments. The 60g planting material weight recorded more shoots than the 20g and 40g planting material sizes. The 60g planting material weight is recommended to farmers for the purpose of multiplication of Pleurotus tuberregium for better economicreturns.