scholarly journals Usage of Augmented Reality Glasses in Automotive Industry: Age-Related Effects on Cognitive Load

2019 ◽  
Vol 8 (3) ◽  
pp. 1-6 ◽  
Keyword(s):  
Augmented Reality ◽  
Cognitive Load ◽  
Manufacturing Industry ◽  
Assembly Line ◽  
Assembly Lines ◽  
Automotive Manufacturing ◽  
Research Areas ◽  
Age Related ◽  
Eeg Data ◽  
Significant Difference

With the development of technology, augmented reality (AR) devices were introduced in many areas. One of these devices, AR glasses, is more convenient and easy to fulfil and still continuing to evolve. The AR glasses, which are frequently used in sectors such as education, entertainment, construction and automotive, bring many research areas. In this article, the cognitive load that AR glasses bring to the users who is working on an assembly line has been investigated. Cognitive load refers to the resources used by working memory in the brain. This study was carried out with healthy participants in the assembly line of an automotive manufacturing factory and 60 tests were performed for measurement. Effect of the AR glasses for participants under 35 and over 35 years of age was measured by electroencephalography (EEG). EEG is a common objective technique used in cognitive load measurements. EEG data collected were examined and no significant difference was observed between participants of under and over 35 years of age. When compared with the data obtained in the experiments without glasses, it was seen that the use of the AR glasses in assembly lines of automotive manufacturing factories did not create an additional cognitive load. It can be seen from the article that AR glasses did not have an age-related effect and can be use in the automotive manufacturing industry

scholarly journals Increasing The Efficiency of The Cub Engine Assembly Lines In The Automotive Industry Using Ranked Positional Weight

2018 ◽  
Vol 218 ◽  
pp. 04028
Author(s):  
Inaki Maulida Hakim ◽  
Syarafi Auzan Mu’min ◽  
Rolina Oktapiani Zaqiah
Keyword(s):  
Production Process ◽  
Automotive Industry ◽  
Manufacturing Industry ◽  
Assembly Line ◽  
Consumer Demand ◽  
Assembly Lines ◽  
Production Flow ◽  
Subsequent Increase ◽  
The Right ◽  
Positional Weight

In this modern era, the competition among the manufacturing industry, especially in the automotive sector will become increasingly tight which causes companies need to innovate so that satisfaction of the consumer can be maintained. The production process will be an important aspect in the automotive industry to maintain the quality of products and ensure consumer demand can be fulfilled. The problems that often occur in the production process is in the form of production flow constraints caused by workload unbalanced in the assembly lines. The imbalance causes the assembly lines do not run in a cycle time that is determined, so that consumer demand can not be meet in the right amount and companies need to spend more to mitigate them. Therefore, this study was conducted to balance workload on the assembly line by using line balancing form Ranked Positional Weight (RPW) with a subsequent increase in the efficiency and productivity of assembly line that affect production process runs without any contraints.

scholarly journals An augmented reality learning system for Japanese compound verbs: study of learning performance and cognitive load

2020 ◽  
Vol 7 (1) ◽  
Author(s):  
Xuewang Geng ◽  
Masanori Yamada
Keyword(s):  
Augmented Reality ◽  
Cognitive Load ◽  
Language Learning ◽  
Learning System ◽  
Learning Performance ◽  
Learning Methods ◽  
Significant Difference ◽  
Image Schema ◽  
Compound Verbs ◽  
Improved Performance

Abstract To address the difficulties related to acquiring Japanese compound verbs, which lack the clarity of verb combinations and the opacity of compound verb meanings, we designed and developed an augmented reality (AR) learning system based on image schema and AR animations. We investigated the effects of the AR-based language learning system developed in this study on the learning performance and cognitive load of an AR learning system and paper-based image schema materials. This study also examined the correlation between learning performance and cognitive load. Learners of these two learning methods had significantly improved performance on post-tests. Especially, regarding the retention of knowledge, the AR learning system was more effective. However, there was no significant difference in the perceived cognitive loads between the two learning methods. It is also found that the learning performance of the two learning methods was related to the perceived different types of cognitive load.

scholarly journals Analysis of the Effect of the Line-Seru Conversion on the Waiting Time with Batch Arrival

2019 ◽  
Vol 2019 ◽  
pp. 1-13
Author(s):  
Hui Ren ◽  
Dongyu Wang
Keyword(s):  
Waiting Time ◽  
Queue Length ◽  
Manufacturing Industry ◽  
Assembly Line ◽  
Production Method ◽  
Assembly Lines ◽  
Batch Production ◽  
Batch Arrivals ◽  
Successful Innovation ◽  
The Relationship

The conveyor assembly line has been widely used in manufacturing industries to produce standard products with low costs. However, due to lack of flexibility, this production method has not been conducive to multivariety and small-batch production. In this situation, seru production formed by converting conveyor assembly lines has been a successful innovation in the Japanese manufacturing industry. Most of the existing literature has studied the benefits of this line-seru conversion from the perspective of the enterprises themselves, but this paper studies the effect of the line-seru conversion on the waiting time from the perspective of the customer. First, the change in the average waiting queue length caused by the line-seru conversion is proposed as an evaluation index. Second, with the consideration of the practical situation of random batch arrivals, the average waiting queue length formulas for the conveyor assembly line and seru production are established based on the assumption that the arrival is a Poisson process. Then, under two scenarios, we investigate the relationship between the average waiting queue length changed by the line-seru conversion and other parameters and find that the conversion can reduce the average waiting queue length in multivariety and small-batch production. Finally, under other potential scenarios, the equations for determining the average waiting queue length resulting from a change to line-seru conversion are derived.

scholarly journals The effects of noise exposure and work-related fatigue on the acceptable noise level test in normal-hearing people

2021 ◽  
Author(s):  
Nafiseh Heidari ◽  
Ahmad Geshani ◽  
Nematollah Rouhbakhsh ◽  
Elham Faghihzadeh ◽  
Mohammad Alishahi
Keyword(s):  
Noise Level ◽  
Manufacturing Industry ◽  
Noise Exposure ◽  
Normal Hearing ◽  
Automotive Manufacturing ◽  
Work Related ◽  
Significant Difference ◽  
Acceptable Noise Level ◽  
Before And After ◽  
Production Group

Background and Aim: The acceptable noise level (ANL) assesses the noise that a person can tolerate during a running speech. Although it is a strong test, it has not yet become popular in clinical practice. One of the reasons is its contradictory results. Since it is a psychoacoustic test, psychological factors can affect its output. Investigation of these factors can provide more accurate results. This study aims to investigate the effects of noise and work-related fatigue on the ANL in normal-hearing people. Methods: Participants were the male workers in the administration (n = 26) and production (n = 26) departments of an automotive manufacturing industry in Iran. They were evaluated before and after leaving the workplace in order to determine the effects of noise exposure, fatigue as well as their simultaneous effects on the ANL. Results: In both groups, the ANL showed a significant increase after work compared to its level before work, and the background noise level (BNL) was significantly decreased. There was no significant difference in the BNL between administration and production groups before work. The most comfortable level (MCL) showed no significant increase. Moreover, the MCL changes were not significantly different in the production group compared to administration group, but the BNL and ANL changes were significantly higher. Conclusion: Noise exposure and work-related fatigue affect the ANL. During the ANL test, earlier exposure to noise and the amount of fatigue should be controlled.   Keywords: Exposure to noise; fatigue; acceptable noise level

scholarly journals A Branch-and-Price Algorithm for Balancing Two-Sided Assembly Lines with Zoning Constraints

2021 ◽  
Vol 2021 ◽  
pp. 1-18
Author(s):  
Qidong Yin ◽  
Xiaochuan Luo ◽  
Julien Hohenstein
Keyword(s):  
Large Scale ◽  
Manufacturing Industry ◽  
Assembly Line ◽  
Programming Model ◽  
Assembly Line Balancing ◽  
Mixed Integer ◽  
Branch And Price ◽  
Assembly Lines ◽  
Real World Datasets ◽  
Assembly Production

Two-sided assembly lines are widely used in the large-size product manufacturing industry, especially for automotive assembly production. Balancing the assembly line is significant for assembly process planning and assembly production. In this study, we develop a novel and exact method to optimize the two-sided assembly line balancing problem with zoning constraints (TALBz), in which the aim is to minimize the number of mated-stations considering the task restrictions. A mixed-integer programming model is employed to exactly describe the TALBz problem. To strengthen the computational efficiency, we apply Dantzig–Wolfe decomposition to reformulate the TALBz problem. We further propose a branch-and-price (B&P) algorithm that integrates the column generation approach into a branch-and-bound frame. Both the benchmark datasets with zoning constraints and without zoning constraints are tested to evaluate the performance of the B&P algorithm. The numerical results show that our proposed approach can obtain optimal solutions efficiently on most cases. In addition, experiments on the real-world datasets originating from passenger vehicle assembly lines are conducted. The proposed B&P algorithm shows its advantage in tackling practical problems with the task restrictions. This developed methodology therefore provides insight for solving large-scale TALBz problems in practice.

The influence of osteopathic correction on the rate of various rhythms of the body

2019 ◽  
pp. 64-71 ◽  
Author(s):  
A. E. Chernikova ◽  
Yu. P. Potekhina
Keyword(s):  
Heart Rate ◽  
Respiratory Rate ◽  
Age Groups ◽  
Biomechanical Properties ◽  
Dispersion Analysis ◽  
The Body ◽  
Body Tissues ◽  
Age Related ◽  
Significant Difference ◽  
Before And After

Introduction. An osteopathic examination determines the rate, the amplitude and the strength of the main rhythms (cardiac, respiratory and cranial). However, there are relatively few studies in the available literature dedicated to the influence of osteopathic correction (OC) on the characteristics of these rhythms.Goal of research — to study the influence of OC on the rate characteristics of various rhythms of the human body.Materials and methods. 88 adult osteopathic patients aged from 18 to 81 years were examined, among them 30 men and 58 women. All patients received general osteopathic examination. The rate of the cranial rhythm (RCR), respiratory rate (RR) heart rate (HR), the mobility of the nervous processes (MNP) and the connective tissue mobility (CTM) were assessed before and after the OC session.Results. Since age varied greatly in the examined group, a correlation analysis of age-related changes of the assessed rhythms was carried out. Only the CTM correlated with age (r=–0,28; p<0,05) in a statistically significant way. The rank dispersion analysis of Kruskal–Wallis also showed statistically significant difference in this indicator in different age groups (p=0,043). With the increase of years, the CTM decreases gradually. After the OC, the CTM, increased in a statistically significant way (p<0,0001). The RCR varied from 5 to 12 cycles/min in the examined group, which corresponded to the norm. After the OC, the RCR has increased in a statistically significant way (p<0,0001), the MNP has also increased (p<0,0001). The initial heart rate in the subjects varied from 56 to 94 beats/min, and in 15 % it exceeded the norm. After the OC the heart rate corresponded to the norm in all patients. The heart rate and the respiratory rate significantly decreased after the OC (р<0,0001).Conclusion. The described biorhythm changes after the OC session may be indicative of the improvement of the nervous regulation, of the normalization of the autonomic balance, of the improvement of the biomechanical properties of body tissues and of the increase of their mobility. The assessed parameters can be measured quickly without any additional equipment and can be used in order to study the results of the OC.

scholarly journals Age-Related Biology of Early-Stage Operable Breast Cancer and Its Impact on Clinical Outcome

Cancers ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 1417
Author(s):  
Binafsha M. Syed ◽  
Andrew R. Green ◽  
Emad A. Rakha ◽  
David A.L. Morgan ◽  
Ian O. Ellis ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Early Stage ◽  
Histological Grade ◽  
Survival Rates ◽  
Growth Factor Receptor ◽  
Progesterone Receptors ◽  
Biological Characteristics ◽  
Cancer Specific Survival ◽  
Age Related ◽  
Significant Difference

As age advances, breast cancer (BC) tends to change its biological characteristics. This study aimed to explore the natural progression of such changes. The study included 2383 women with clinically T0-2N0-1M0 BC, managed by primary surgery and optimal adjuvant therapy in a dedicated BC facility. Tissue micro-arrays were constructed from their surgical specimens and indirect immunohistochemistry was used for analysis of a large panel (n = 16) of relevant biomarkers. There were significant changes in the pattern of expression of biomarkers related to luminal (oestrogen receptor (ER), progesterone receptors (PgR), human epidermal growth factor receptor (HER-2), E-cadherin, MUC1, bcl2 CK7/8, CK18 and bcl2) and basal (CK5/6, CK14, p53 and Ki67) phenotypes, lymph node stage, histological grade and pathological size when decade-wise comparison was made (p < 0.05). The ages of 40 years and 70 years appeared to be the milestones marking a change of the pattern. There were significantly higher metastasis free and breast cancer specific survival rates among older women with ER positive tumours while there was no significant difference in the ER negative group according to age. Biological characteristics of BC show a pattern of change with advancing age, where 40 years and 70 years appear as important milestones. The pattern suggests <40 years as the phase with aggressive phenotypes, >70 years as the less aggressive phase and 40–70 years being the transitional phase.

Impact of Cochlear Implantation on Neurocognitive Subdomains in Adult Cochlear Implant Recipients

2021 ◽  
pp. 1-10
Author(s):  
Christiane Völter ◽  
Lisa Götze ◽  
Imme Haubitz ◽  
Janine Müther ◽  
Stefan Dazert ◽  
...  
Keyword(s):  
Hearing Loss ◽  
Cochlear Implant ◽  
Cochlear Implantation ◽  
Verbal Fluency ◽  
Homogeneous Population ◽  
Delayed Recall ◽  
Hearing Status ◽  
Age Related ◽  
Significant Difference ◽  
The Impact

<b><i>Introduction:</i></b> Age-related hearing loss affects about one-third of the population worldwide. Studies suggest that hearing loss may be linked to cognitive decline and auditory rehabilitation may improve cognitive functions. So far, the data are limited, and the underlying mechanisms are not fully understood. The study aimed to analyze the impact of cochlear implantation on cognition in a large homogeneous population of hearing-impaired adults using a comprehensive non-auditory cognitive assessment with regard to normal-hearing (NH) subjects. <b><i>Material and Methods:</i></b> Seventy-one cochlear implant (CI) candidates with a postlingual, bilateral severe or profound hearing loss aged 66.3 years (standard deviation [SD] 9.2) and 105 NH subjects aged 65.96 years (SD 9.4) were enrolled. The computer-based neurocognitive tool applied included 11 subtests covering attention (M3), short- and long-term memory (recall and delayed recall), working memory (0- and 2-back, Operation Span [OSPAN] task), processing speed (Trail Making Test [TMT] A), mental flexibility (TMT B), inhibition (cFlanker and iFlanker), and verbal fluency. CI patients underwent a neurocognitive testing preoperatively as well as 12 months postoperatively. Impact of hearing status, age, gender, and education on cognitive subdomains was studied. Additionally, after controlling for education and age, cognitive performance of CI subjects (<i>n</i> = 41) was compared to that of NH (<i>n</i> = 34). <b><i>Results:</i></b> CI users achieved significantly better neurocognitive scores 12 months after cochlear implantation than before in most subtests (M3, [delayed] recall, 2-back, OSPAN, iFlanker, and verbal fluency; all <i>p</i> &#x3c; 0.05) except for the TMT A and B. A significant correlation could be found between the postoperative improvement in speech perception and in the attentional task M3 (<i>p</i> = 0.01). Hearing status (<i>p</i> = 0.0006) had the strongest effect on attention, whereas education had a high impact on recall (<i>p</i> = 0.002), OSPAN (<i>p</i> = 0.0004), and TMT A (<i>p</i> = 0.005) and B (<i>p</i> = 0.003). Inhibition was mainly age-dependent with better results in younger subjects (<i>p</i> = 0.016). Verbal fluency was predicted by gender as females outperformed men (<i>p</i> = 0.009). Even after controlling for age and education NH subjects showed a significantly better performance than CI candidates in the recall (<i>p</i> = 0.03) and delayed recall (<i>p</i> = 0.01) tasks. Postoperatively, there was no significant difference between the 2 groups anymore. <b><i>Conclusion:</i></b> Impact of cochlear implantation on neurocognitive functions differs according to the cognitive subdomains. Postoperatively, CI recipients performed as good as age- and education-matched NH subjects.

Sign in / Sign up

Export Citation Format

Share Document