scholarly journals The Effect of Material Conveyances on Workload, Musculoskeletal Disorders, Productivity and Performance in the Process of Plate Cutting

2021 ◽  
Vol 21 (3) ◽  
pp. 197-204
Author(s):  
I Nyoman Sutarna ◽  
◽  
I Nengah Ludra Antara ◽  
Daud Simon Anakottapary ◽  
◽  
...  
Keyword(s):  
Musculoskeletal Disorders ◽  
Human Body ◽  
Design Method ◽  
Risk Category ◽  
Musculoskeletal Complaints ◽  
Material Transport ◽  
Subject Design ◽  
Increase In Productivity ◽  
And Performance ◽  
Paired T Test

The use of material conveyances that are not in accordance with the concept of ergonomics harm the human body. Repair of work brushes by applying ergonomics to material conveyances can reduce the risk category. The purpose of this study was to determine the effect of material conveyance on reducing workload, musculoskeletal disorders, increasing productivity and performance. The study was conducted using the same subject design method with a sample of 16 workers. The data were analyzed by paired t-test with a significant level of p<0.05. The results of the analysis showed that the PO workload data was 104.4 beats per minute, P1 was 93.5 beats per minute there was a decrease of 10.9 beats per minute or 10.4%, PO musculoskeletal complaints were 80.1 scores, P1 was 70.0 the scores were decreased by 10.1 or 12.6%, PO productivity of 0.201, P1 of 0.355, an increase of 0.154 or 43.4%. The conclusion is that the use of material conveyances means a decrease in workload, musculoskeletal disorders, an increase in productivity and performance. It is recommended to workers to use material conveyances equipment in carrying out transport and material transport activities.

Methodological Approaches to Research on Musculoskeletal Complaints and Injuries

2002 ◽  
Vol 46 (13) ◽  
pp. 1032-1036
Author(s):  
Krystyna Gielo-Perczak ◽  
Waldemar Karwowski ◽  
Shrawan Kumar ◽  
William Marras
Keyword(s):  
Fuzzy Logic ◽  
Musculoskeletal Disorders ◽  
Human Body ◽  
Musculoskeletal Injuries ◽  
Musculoskeletal Complaints ◽  
Theoretical Concepts ◽  
Simulation Tools ◽  
Machine System ◽  
Methodological Approaches ◽  
The Relationship

An important aspect of workplace design is the creation of possible ways to bring innovations to the prevention of excessive joint loading. The solutions for finding these different options are new theoretical concepts with applications of biomechanics and fuzzy logic, innovative insights into the human body using simulation tools, critical examinations of the relationship between workplace analysis and causality in the control of musculoskeletal disorders, and inventive studies of their validity through epidemiology. These methodological approaches can be useful tools for minimizing incompatibilities between the capabilities of workers and the demands of their jobs and prevention of likely musculoskeletal injuries during work. The results of these approaches can assess the suitability of the designed human-machine system and determine possible improvements in the workplace.

scholarly journals The Effectiveness of the Rule of Twenty Method in Reducing the Musculoskeletal Complaints among Educational Staffs

2020 ◽  
Vol 6 (2) ◽  
pp. 78
Author(s):  
Ratih Andhika Akbar Rahma ◽  
Dian Afif Arifah ◽  
Ario Ramadhan
Keyword(s):  
Musculoskeletal Disorders ◽  
T Test ◽  
Risk Level ◽  
Musculoskeletal Complaints ◽  
Significant Difference ◽  
Before And After ◽  
Post Test ◽  
Educational Staff ◽  
The University ◽  
Paired T Test

Educational staff at the University of Darussalam Gontor sit in front of the computer screen for quite a long time, causing musculoskeletal complaints. Applying the Rule of Twenty (RoT) method is one way to minimize the risk of musculoskeletal disorders. This study aimed to measure the effectiveness of the Rule of Twenty methods in reducing the risk level of complaints of musculoskeletal disorders for the educational staff of the University of Darussalam Gontor. This study was a pre-experimental research with one group pre-test – post-test design. The population in this study was the entire 68 educational staff of the University of Darussalam Gontor. Twenty-one (21) staff involved as a sample in this study and selected by purposive sampling method. The Nordic Body Map instrument was used to measure musculoskeletal complaint levels before and after the rule of twenty methods applied. Data were analyzed using the SPSS program version with autocorrelation test and paired t-test (CI: 95%). The measurement results of musculoskeletal disorders among 21 respondents before and after the application of RoT were the level of action 1 (low-risk level). The result of the autocorrelation measurement showed that the value of Durbin Watson (DW) was 1.958 and DW (1.968)> DU (1.8116), indicates that there was no autocorrelation between variables. The paired t-test showed the value of t = 5.760 and p = 0.0001, indicates a significant difference between musculoskeletal disorders before and after the application of the Rule of Twenty Method (p<0.05). Based on the result, this study found that the Rule of Twenty Method is effective in reducing the musculoskeletal disorders of the Educational Staffs, and potentially reduce 9.4% of musculoskeletal complaints among workers.

Frequency of Neck and Upper Extremity Musculoskeletal Disorders in Dentists

2020 ◽  
Vol 9 (3) ◽  
pp. 207-211
Author(s):  
Sidra Sarwar ◽  
Sara Khalid ◽  
Tahir Mahmood ◽  
Hadeeqa Jabeen ◽  
Shahid Imran
Keyword(s):  
Upper Extremity ◽  
Musculoskeletal Disorders ◽  
Health Care Professionals ◽  
Descriptive Analysis ◽  
Sampling Technique ◽  
Cross Sectional Study ◽  
Cross Sectional ◽  
Dental Hospital ◽  
Upper Extremity Musculoskeletal Disorders ◽  
And Performance

Background: Musculoskeletal disorders are not only becoming prevalent among health care professionals in our country but are affecting their health and performance adversely. They are caused by poor ergonomics and awkward posture during work activities. The purpose of this study was to determine the frequency of neck and upper limb musculoskeletal disorders in dentists of Lahore, Pakistan. Material and Methods: This cross-sectional study was conducted during October 2017 to March 2018. The data was collected using convenient sampling technique from 162 Dentists including 52 males and 110 females of Children hospital Lahore, Punjab Dental hospital and Fatima Memorial Hospital, Lahore. Data was collected by using Mangalore Questionnaire for identification of musculoskeletal disorders. Descriptive analysis of the data was done using SPSS version 22.0. Results: Of 162 dentists, 115 (71%) suffered from musculoskeletal disorders. Shoulder was the most commonly affected region (30.9%) followed by neck (25.9%), arm (6.2%), wrist (4.3%), elbow (3.1%) and forearm (0.6%). Pain (45.7%) was found to be the most common complaint followed by muscle weakness (20.4%), paraesthesia (3.7%) and swelling (1.2%). Conclusions: It was concluded that majority of the dentists were suffering from musculoskeletal disorders with shoulder as the most affected region and pain as the most frequent complaint. Key words: Dentists, Musculoskeletal disorders, Neck pain, Upper extremity

PENGARUH MEDIA GAMBAR TERHADAP KEMAMPUAN MENULIS PUISI SISWA

2018 ◽  
Vol 2 (1) ◽  
Author(s):  
Sinta Maria Dewi
Keyword(s):  
Design Method ◽  
Writing Skills ◽  
Class Action ◽  
T Test ◽  
Control Group ◽  
Control Group Design ◽  
Media Image ◽  
Group Design ◽  
Random Method ◽  
Paired T Test

Abstract: This research aims to know the Influence of Media Image on the ability of Writing Poetry students. The method used in this study is a random method that does not use posttes control group design method. The findings of this study show the average way of writing poetry on students by using the image media (experimental class) higher average poetry writing skills on students who were taught with conventional learning (control class). The average of pretest experiments obtained by experiment class is 63,75. The average pretest class of control class is 61,05. After the second class action, the average posttest of the experimental class is 79.45 and the control class is 74.95. Hypothesis calculation using t paired t test test and significance of 0.05 significant level indicates probability (significance) is 0,033. Because of the significance of 0.033

scholarly journals A modular design method based on TRIZ and AD and its application to cutter changing robot

2021 ◽  
Vol 13 (7) ◽  
pp. 168781402110343
Author(s):  
Mei Yang ◽  
Yimin Xia ◽  
Lianhui Jia ◽  
Dujuan Wang ◽  
Zhiyong Ji
Keyword(s):  
Modular Design ◽  
Design Method ◽  
Idea Generation ◽  
Design Parameters ◽  
Problem Analysis ◽  
Concept Design ◽  
Functional Requirements ◽  
Shield Tunneling ◽  
Structural Hierarchy ◽  
And Performance

Modular design, Axiomatic design (AD) and Theory of inventive problem solving (TRIZ) have been increasingly popularized in concept design of modern mechanical product. Each method has their own advantages and drawbacks. The benefit of modular design is reducing the product design period, and AD has the capability of problem analysis, while TRIZ’s expertise is innovative idea generation. According to the complementarity of these three approaches, an innovative and systematic methodology is proposed to design big complex mechanical system. Firstly, the module partition is executed based on scenario decomposition. Then, the behavior attributes of modules are listed to find the design contradiction, including motion form, spatial constraints, and performance requirements. TRIZ tools are employed to deal with the contradictions between behavior attributes. The decomposition and mapping of functional requirements and design parameters are carried out to construct the structural hierarchy of each module. Then, modules are integrated considering the connections between each other. Finally, the operation steps in application scenario are designed in temporal and spatial dimensions. Design of cutter changing robot for shield tunneling machine is taken as an example to validate the feasibility and effectiveness of the proposed method.

scholarly journals Characterizing the Effects of Explosive Ordnance Disposal Operations on the Human Body While Wearing Heavy Personal Protective Equipment

2021 ◽  
pp. 001872082199262
Author(s):  
Yi-Ning Wu ◽  
Adam Norton ◽  
Michael R. Zielinski ◽  
Pei-Chun Kao ◽  
Andrew Stanwicks ◽  
...  
Keyword(s):  
Human Body ◽  
Personal Protective Equipment ◽  
Evaluation Methodology ◽  
Protective Equipment ◽  
Physiological Measurement ◽  
Cognitive Stress ◽  
Explosive Ordnance Disposal ◽  
And Performance ◽  
Inspection Tasks ◽  
Muscle Activations

Objective To provide a comprehensive characterization of explosive ordnance disposal (EOD) personal protective equipment (PPE) by evaluating its effects on the human body, specifically the poses, tasks, and conditions under which EOD operations are performed. Background EOD PPE is designed to protect technicians from a blast. The required features of protection make EOD PPE heavy, bulky, poorly ventilated, and difficult to maneuver in. It is not clear how the EOD PPE wearer physiologically adapts to maintain physical and cognitive performance during EOD operations. Method Fourteen participants performed EOD operations including mobility and inspection tasks with and without EOD PPE. Physiological measurement and kinematic data recording were used to record human physiological responses and performance. Results All physiological measures were significantly higher during the mobility and the inspection tasks when EOD PPE was worn. Participants spent significantly more time to complete the mobility tasks, whereas mixed results were found in the inspection tasks. Higher back muscle activations were seen in participants who performed object manipulation while wearing EOD PPE. Conclusion EOD operations while wearing EOD PPE pose significant physical stress on the human body. The wearer’s mobility is impacted by EOD PPE, resulting in decreased speed and higher muscle activations. Application The testing and evaluation methodology in this study can be used to benchmark future EOD PPE designs. Identifying hazards posed by EOD PPE lays the groundwork for developing mitigation plans, such as exoskeletons, to reduce physical and cognitive stress caused by EOD PPE on the wearers without compromising their operational performance.

Equine hindlimb hoof biomechanics: an evaluation of the effect of routine hoof trimming on force and pressure distribution at midstance

2020 ◽  
Vol 16 (4) ◽  
pp. 333-337
Author(s):  
B. Faramarzi ◽  
M. Polniaszek ◽  
F. Dong
Keyword(s):  
Contact Pressure ◽  
Musculoskeletal Injuries ◽  
Medial Aspect ◽  
P Values ◽  
Pressure Plate ◽  
Before And After ◽  
And Performance ◽  
The Impact ◽  
Hindlimb Lameness ◽  
Paired T Test

Proper hoof function is vital for equine health and performance. Many musculoskeletal injuries in horses originate from the foot. Most studies performed to date have focused on the forehoof while the hindhoof (HH) has received less attention. Our goal was to examine the influence of routine hoof trimming on HH medio-lateral hoof balance. The objective of this study was to examine force (F), contact pressure (CP), and contact area (CA) at the medial and lateral aspects of the HH to evaluate the impact of routine hoof trimming on HH biomechanics. Clinically sound Arabian horses (n=9) were walked across a calibrated pressure plate before and after routine hoof trimming and the F, CP, and CA at the medial and lateral aspects of the HH were recorded at midstance pre- and post-trimming. The differences between these regions were investigated using a paired T-test. P-values <0.05 were considered significant. Among measured variables, force increased by 25% (P=0.007) and contact pressure increased by 13% (P=0.032) at the medial aspect of the HH after routine hoof trimming. Analysing data from hindlimb hoof-surface interaction in sound horses will allow for a better understanding of imbalances that may lead to pathologies and hindlimb lameness in horses.

Effect of a Musicians’ Exercise Intervention on Performance-Related Musculoskeletal Disorders

2014 ◽  
Vol 29 (4) ◽  
pp. 181-188 ◽  
Author(s):  
Cliffton Chan ◽  
Tim Driscoll ◽  
Bronwen J Ackermann
Keyword(s):  
Musculoskeletal Disorders ◽  
Private Practice ◽  
Perceived Exertion ◽  
Exercise Intervention ◽  
Exercise Program ◽  
Exercise Group ◽  
Control Group ◽  
Full Time ◽  
Related Factors ◽  
And Performance

PURPOSE: To evaluate the effect of a purpose-designed exercise program on performance-related musculoskeletal disorders (PRMDs) and associated risk factors in a sample of professional orchestral musicians. METHODS: A 10-week exercise program was made available to full-time musicians employed by the eight premier symphony orchestras of Australia. Questionnaires were administered before, immediately after (T1), and 6 months after interventions (T2) containing questions relating to change in frequency and severity of PRMDs, ratings of perceived exertion (RPE) during rehearsal, private practice, and performance, as well as nine performance-related factors. Participants were also asked to rate whether these performance-related factors affected their overall playing capacity during different playing situations. A comparative control group of musicians had no intervention and completed a modified questionnaire at the same time points. RESULTS: Exercise participants (n=30) reported a reduction in frequency (p<0.05) and severity (p<0.05) of PRMDs at T1 but not at T2 compared to controls (n=23). The exercise group reported a significant improvement in RPE during private practice at T1 (p<0.01) and T2 (p<0.01), but not during rehearsal and performance. At T1, the intervention was rated to be moderately to highly effective for three performance-related factors: strengthening muscles that support playing, learning techniques that support playing, and posture. Further, participants reported an intervention effect on overall playing capacity during rehearsal at T1 and T2. CONCLUSIONS: A tailored exercise program for musicians was effective at managing PRMDs, especially in reducing the frequency and severity of PRMDs. Physical therapy exercises should be considered in modifying performance-related factors that have been reported to be predictors of PRMDs.

scholarly journals In-Body Ranging with Ultra-Wideband Signals: Techniques and Modeling of the Ranging Error

2017 ◽  
Vol 2017 ◽  
pp. 1-15 ◽  
Author(s):  
Muzaffer Kanaan ◽  
Memduh Suveren
Keyword(s):  
Neural Networks ◽  
Human Body ◽  
Extreme Value Distribution ◽  
Generalized Extreme Value Distribution ◽  
Ultra Wideband ◽  
Wideband Signals ◽  
Ranging Error ◽  
And Performance ◽  
Ranging Errors ◽  
Wireless Capsule

Results about the problem of accurate ranging within the human body using ultra-wideband signals are shown. The ability to accurately measure the range between a sensor implanted in the human body and an external receiver can make a number of new medical applications such as better wireless capsule endoscopy, next-generation microrobotic surgery systems, and targeted drug delivery systems possible. The contributions of this paper are twofold. First, we propose two novel range estimators: one based on an implementation of the so-called CLEAN algorithm for estimating channel profiles and another based on neural networks. Second, we develop models to describe the statistics of the ranging error for both types of estimators. Such models are important for the design and performance analysis of localization systems. It is shown that the ranging error in both cases follows a heavy-tail distribution known as the Generalized Extreme Value distribution. Our results also indicate that the estimator based on neural networks outperforms the CLEAN-based estimator, providing ranging errors better than or equal to 3.23 mm with 90% probability.

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