scholarly journals Evaluation and Study on Relationship between Sitting Posture and Work Efficiency

2017 ◽  
Vol 128 ◽  
pp. 04002
Author(s):  
Pei Xuesheng ◽  
Tian Liyingi
2020 ◽  
Vol 140 (6) ◽  
pp. 338-339
Author(s):  
Hirofumi Sanada ◽  
Naofumi Wada ◽  
Megumi Takezawa ◽  
Hiroki Matsuzaki
Keyword(s):  

Author(s):  
С.А. Демидов

Рассматриваются возможности применения системы машин модульно-блочного типа в перспективных технологиях лесосечных работ, а также проблемы машинного парка лесозаготовительных предприятий России. Цель исследования - изучение структуры и особенностей эксплуатации системы лесных машин модульно блочного типа в современных условиях лесозаготовок с перспективой применения на ближайшее будущее. Для улучшения технологии проведения лесосечных работ и повышения экономической эффективности лесопромышленного комплекса предлагается провести ряд важных технических и технологических изменений. Одним из решений проблемы по улучшению эффективности работы является разработка и внедрение комплекса лесных машин, основанного на принципе эксплуатационной модульности. Это будет гарантировать технологическую гибкость производства, предоставит высокую производительность и обеспечит совместимость с окружающей средой. Приведен принцип устройства машин модульно-блочного типа с разделением функций между транспортными и технологическими модулями. Представлены графически классификация модулей по их назначению и концепция компоновки системы машин модульно-блочного типа, а также главный модуль (энергетический) и несколько технологических модулей, способных выполнять различные технологические операции в зависимости от условий и технологии производства. Как показал анализ рынка, наиболее перспективным направлением по улучшению механизации лесного парка машин является создание комплекса модульно-блочных машин на базе колесного трактора, оснащенных гидрообъемными передачами. Это делает конструкцию машины более гибкой и мобильной. Принцип формирования и работы модульной системы машин с многофункциональным технологическим оборудованием рассматривается в качестве перспективного направления по улучшению лесозаготовительного процесса. The article deals with the prospects for the use of machines modular block type in the advanced technology logging activities, as well as the machinery problems of logging enterprises in Russia. The research objective. The study of the structure and operating characteristics of a system of forest modular block type machines in current conditions with the prospect of their application in the nearest future. It is necessary that a number of important technical and technological changes should be made to improve the technology of logging operations and increase the economic efficiency of timber industry complex. One of the solutions to improve work efficiency is the development and introduction of forest machines based on the principle of operational modularity. It will ensure the flexibility of the production process, provide high work efficiency and, what counts, will be environmentally friendly. The article gives the description of the principle of the machine module block type, as well as the functions and how they are divided between the two modules. There are two pictures in the article. The first picture gives the classification of modules according to their application. The second picture shows the principle of arrangement of modular machine-block type. Both the main energetic module and some technological modules capable of performing processing steps depending on the conditions and production technology are presented. According to the market analysis that shows that the most promising direction to improve the mechanization of forest machinery is to create a complex modular block machines on the base of a wheeled tractor equipped with hydrostatic transmission. It will make the machine design more flexible and mobile. The principle of formation and operation of the modular system with multi-function machines process equipment is considered as a promising direction for improvement of the process of logging.


Author(s):  
Dr. Unnikrishnan VS ◽  
Dr. Prashanth AS

Now a days due to sedentary lifestyle and lack of time, people cannot concentrate on their proper regimen and people undergo many unwanted practices like faulty dietary habits, improper sitting posture, continuous work in one posture and overexertion, load bearing movements during travelling and sports. All these factors lead to the increase in the incidents of Manyasthambha in a large population. In classics Manyasthambha is explained under Vataja Nanatmaja Vikaras and is mentioned as Kaphaavruta Vata in its Samprapthi. While explaining treatment of Manyasthambha, Acharya Susruta clearly explains about Rooksha Sweda and Nasya which helps in the Samprapti Vighatana of Avarana in Manyasthambha.


2020 ◽  
Vol 179 ◽  
pp. 02101
Author(s):  
Jiao Hu ◽  
Qing Yin ◽  
Canqun He

In the daily work of office workers, the comfort of the office chair has a great impact on the staff’s work efficiency and human health. Sitting on the office chair for a long time may cause diseases such as cervical, shoulder, and lumbar spine. This article uses online literature research, brand analysis, and offline field research to understand the current status and deficiencies of office chairs, find design points and design directions, and based on ergonomics and sitting analysis research, design general office chairs for female white-collar workers to achieve a comfortable and healthy office purpose.


2021 ◽  
Vol 17 (7) ◽  
pp. 155014772110248
Author(s):  
Miaoyu Li ◽  
Zhuohan Jiang ◽  
Yutong Liu ◽  
Shuheng Chen ◽  
Marcin Wozniak ◽  
...  

Physical health diseases caused by wrong sitting postures are becoming increasingly serious and widespread, especially for sedentary students and workers. Existing video-based approaches and sensor-based approaches can achieve high accuracy, while they have limitations like breaching privacy and relying on specific sensor devices. In this work, we propose Sitsen, a non-contact wireless-based sitting posture recognition system, just using radio frequency signals alone, which neither compromises the privacy nor requires using various specific sensors. We demonstrate that Sitsen can successfully recognize five habitual sitting postures with just one lightweight and low-cost radio frequency identification tag. The intuition is that different postures induce different phase variations. Due to the received phase readings are corrupted by the environmental noise and hardware imperfection, we employ series of signal processing schemes to obtain clean phase readings. Using the sliding window approach to extract effective features of the measured phase sequences and employing an appropriate machine learning algorithm, Sitsen can achieve robust and high performance. Extensive experiments are conducted in an office with 10 volunteers. The result shows that our system can recognize different sitting postures with an average accuracy of 97.02%.


Sensors ◽  
2021 ◽  
Vol 21 (11) ◽  
pp. 3588
Author(s):  
Yuki Iwata ◽  
Han Trong Thanh ◽  
Guanghao Sun ◽  
Koichiro Ishibashi

Heart rate measurement using a continuous wave Doppler radar sensor (CW-DRS) has been applied to cases where non-contact detection is required, such as the monitoring of vital signs in home healthcare. However, as a CW-DRS measures the speed of movement of the chest surface, which comprises cardiac and respiratory signals by body motion, extracting cardiac information from the superimposed signal is difficult. Therefore, it is challenging to extract cardiac information from superimposed signals. Herein, we propose a novel method based on a matched filter to solve this problem. The method comprises two processes: adaptive generation of a template via singular value decomposition of a trajectory matrix formed from the measurement signals, and reconstruction by convolution of the generated template and measurement signals. The method is validated using a dataset obtained in two different experiments, i.e., experiments involving supine and seated subject postures. Absolute errors in heart rate and standard deviation of heartbeat interval with references were calculated as 1.93±1.76bpm and 57.0±28.1s for the lying posture, and 9.72±7.86bpm and 81.3±24.3s for the sitting posture.


2021 ◽  
Vol 58 (4) ◽  
pp. 103462
Author(s):  
Xueping Yang ◽  
Hua (Jonathan) Ye ◽  
Xinwei Wang

ITNOW ◽  
2020 ◽  
Vol 62 (4) ◽  
pp. 56-57
Author(s):  
Johanna Hamilton

Abstract Trevor Hall, Community Lead for Architecture and Operations at the Financial Conduct Authority (FCA) talks to Johanna Hamilton AMBCS about a new model for work efficiency, prioritising people development and how awards reflect team excellence.


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