scholarly journals Surface electromyography: proposal of a protocol for cervical muscles

Revista CEFAC ◽  
2011 ◽  
Vol 14 (5) ◽  
pp. 918-924 ◽  
Author(s):  
Klyvia Juliana Rocha de Moraes ◽  
Daniele Andrade da Cunha ◽  
Luciana Ângelo Bezerra ◽  
Renata Andrade da Cunha ◽  
Hilton Justino da Silva
Keyword(s):  
Surface Electromyography ◽  
Evaluation Method ◽  
Electrical Potential ◽  
Electrical Signal ◽  
Target Area ◽  
Specific Therapy ◽  
Cervical Muscles ◽  
Signal Parameters ◽  
Potential Evaluation ◽  
Detailed Protocol

PURPOSE: to present a proposal of a surface electromyography evaluation method for cervical muscles specific and detailed protocol, with a standardized collection method of electrical signal in these muscles. METHODS: the researchers took as reference the existing publications about this subject which evidenced a need for standardization, clarity, better reproducibility and greater specificity for the surface electromyography evaluation of the upper trapezium and sternocleidomastoid muscles fibers. The proposal preparation process for the current protocol included the cleaning of the target area, placing the electrodes, required tasks in order to collect and register the electrical signal and interpretation of the electromyography signal parameters. This evaluation method was carried out in 24 healthy volunteers of both genders, with an average age of 26 years. We used the electromyography Miotool 400 with 4 channels. RESULT: an evaluation surface electromyography method for upper trapezium and sternocleidomastoid muscles fibers was developed and tested in order to determine the best form of electrical signal data collection for these muscles. CONCLUSION: we submitted a protocol proposal to evaluate the cervical muscles by a surface electromyography, allowing the healthy professionals and researchers to get more information about this electrical potential evaluation method for the sternocleidomastoid and the upper trapezium muscles fibers. This knowledge will be an adjuvant in a more specific therapy.

scholarly journals The Fast Potential Evaluation Method of Enhanced Oil Recovery Based on Statistical Analysis

Processes ◽  
2019 ◽  
Vol 7 (11) ◽  
pp. 795
Author(s):  
Zhengbo Wang ◽  
Qiang Wang ◽  
Desheng Ma ◽  
Wanchun Zhao ◽  
Xiaohan Feng ◽  
...  
Keyword(s):  
Oil Recovery ◽  
Evaluation Method ◽  
Enhanced Recovery ◽  
Chemical Flooding ◽  
Recovery Method ◽  
Steam Flooding ◽  
Tertiary Oil Recovery ◽  
Similarity Ratio ◽  
Potential Evaluation ◽  
Target Block

Based on a large number of empirical statistics of tertiary oil recovery technology in China, including polymer flooding, chemical flooding, gas flooding, in situ combustion, steam flooding, ect., 22 key reservoir parameters were filterized. Five levels of quantitative screening criteria were developed for different tertiary oil recovery methods. The mean algorithm for the downward approximation and the grey correlation theory were used in this paper to quickly select the appropriate tertiary oil recovery method for the target blocks, which provides a preferred development method for subsequent potential evaluation. In the rapid analogy evaluation method of tertiary oil recovery potential, the total similarity ratio between the target block and the example block is determined. The target block is matched with the appropriate instance block according to the total similarity ratio value, using 80% as the boundary. The ratio of the geological reserves is used to predict the oil recovery interval, the actual annual injection data, and the economic profit, thus quickly predicting the economic potential of the tertiary oil recovery technology in the target block. Currently, our research team has integrated these two methods into the tertiary oil production potential evaluation software EORSYS3.0. The empirical analysis shows that this method is reasonable and the conclusion is reliable. In addition, the actual enhanced recovery value is within the effective range predicted by the method. The method and results of this paper will provide an important decision-making reference for the application and sustainable development of China Petroleum’s main tertiary oil recovery technology in the next 5–10 years.

scholarly journals Research on Interaction Potential Evaluation Method of User-side Resources Accessing Energy Internet

2020 ◽  
Vol 446 ◽  
pp. 022060
Author(s):  
Yufeng Chai ◽  
Xianzhong Dai ◽  
Xiaoling Jin ◽  
Yan Zhang ◽  
Xinyang Han ◽  
...  
Keyword(s):  
Interaction Potential ◽  
Evaluation Method ◽  
Energy Internet ◽  
Potential Evaluation

Characteristic Parameters of Surface Electromyography Signals of Cervical Muscles

2012 ◽  
Vol 249-250 ◽  
pp. 1308-1312
Author(s):  
Lin Wang ◽  
Hong Wang ◽  
Rong Rong Fu ◽  
Ning Ning Zhang
Keyword(s):  
Surface Electromyography ◽  
Characteristic Parameters ◽  
Time Frequency ◽  
Cervical Muscles ◽  
Upper Trapezius ◽  
Resistance Moment ◽  
Long Time ◽  
Resistant Moment ◽  
Electromyography Signals ◽  
Semg Signals

Surface electromyography (SEMG) signals of cervical muscles are investigated by time-frequency analysis and biomechanics analysis. Medium frequency (MF) and integrated electromyography (IEMG) are extracted and analyzed from SEMG signals of subjects’ upper trapezius. The Experimental results show that the value of MF decreases and the value of IEMG increases with the increase of fatigue of the vertical muscles. Also, the values of IEMG at different testing points of same cervical muscle are compared. The value of IEMG with higher resistant moment is higher than that with lower resistant moment. That means the muscle with high resistance moment is easier to be fatigue. This investigation is important for people, especially those who work/read with bowing head or before computer for a long time, to prevent cervical spondylosis.

scholarly journals Development of a Wireless Surface Electromyography (sEMG) Signal Acquisition Device for Power-Assisted Wheelchair System

2019 ◽  
Vol 8 (6) ◽  
pp. 3414-3418
Keyword(s):  
Surface Electromyography ◽  
Sampling Rate ◽  
Electrical Potential ◽  
Smart Phone ◽  
Signal Acquisition ◽  
Semg Signal ◽  
Manual Wheelchair ◽  
Dc Motors ◽  
Propulsion Force ◽  
Wireless Device

Muscle fatigue due to long-term of manual wheelchair propulsion is an issue faced by most of users. A power-assisted wheelchair developed to amplify propulsion force that activated by surface electromyography (sEMG). A sEMG detection wireless device to trigger the assistive system is an advantage to ease installation on user’s body and wheelchair which is developed in this study. A device that operated on Arduino Nano processor connected to 2 (two) Myoware sEMG sensors to record muscles electrical potential (EP), recognise the pattern and activate DC motors wirelessly connected through radio frequency. Data monitoring on personal computer and smart phone associated with Bluetooth to store and ease observation on recorded information. Tested on 1 healthy participant by propelling a manual wheelchair on tiled floor. Developed device’s performance tested and the result are average sampling rate (33.55 ms) and average reading latency was just 12.38 ms. Compared to wired device, sampling rate is faster by % and reading latency slower by 1.04 %. Result demonstrate that developed wireless device would improve in speed in signal reading and enhancement on reading latency is needed to provide a reliable device for power-assisted system in the future

Potential Evaluation Method of Carbon Dioxide Flooding and Sequestration

2019 ◽  
pp. 311-331
Author(s):  
Yongle Hu ◽  
Mingqiang Hao ◽  
Chao Wang ◽  
Xinwei Liao ◽  
Lina Song
Keyword(s):  
Carbon Dioxide ◽  
Evaluation Method ◽  
Potential Evaluation ◽  
Carbon Dioxide Flooding

scholarly journals Electrical Signal Guided Ibuprofen Release from Electrodeposited Chitosan Hydrogel

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Youyu Liu ◽  
Kun Yan ◽  
Guoxia Jiang ◽  
Yuan Xiong ◽  
Yumin Du ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Drug Release ◽  
Electrical Potential ◽  
Electrical Signal ◽  
Signal Control ◽  
Titanium Plate ◽  
Chitosan Hydrogel ◽  
Drug Elution ◽  
Conductive Surface ◽  
Ibuprofen Release

Electrical signal guided drug release from conductive surface provides a simple and straightforward way for advanced drug delivery. In this study, we investigated the ibuprofen release from electrodeposited chitosan hydrogel by applying electrical signals. Specifically, chitosan hydrogel was electrodeposited on titanium plate and used as a matrix for ibuprofen load and release. The release of ibuprofen from the chitosan hydrogel on titanium plate was pH sensitive. By applying a positive or negative electrical potential, the release rate of ibuprofen from the electrodeposited chitosan can be facilely controlled. Thus, coupling chitosan electrodeposition and electrical signal control spurs new possibilities for biopolymeric coating and drug elution on conductive implants.

scholarly journals Landslide Potential Evaluation Using Fragility Curve Model

2020 ◽  
Author(s):  
Yi-Min Huang ◽  
Tsu-Chiang Lei ◽  
Bing-Jean Lee ◽  
Meng-Hsun Hsieh
Keyword(s):  
Disaster Response ◽  
Evaluation Method ◽  
Ground Surface ◽  
Shallow Landslide ◽  
Fragility Curve ◽  
Geological Environment ◽  
Damage State ◽  
Accumulated Rainfall ◽  
Steep Topography ◽  
Potential Evaluation

The geological environment of Taiwan mainly contains steep topography and geologically fragile ground surface. Therefore, the vulnerable environmental conditions are prone to landslides during torrential rainfalls and typhoons. The rainfall-induced shallow landslide has become more common in Taiwan due to the extreme weathers in recent years. To evaluate the potential of landslide and its impacts, an evaluation method using the historical rainfall data (the hazard factor) and the temporal characteristics of landslide fragility curve (LFC, the vulnerability factor) was developed and described in this chapter. The LFC model was based on the geomorphological and vegetation factors using landslides at the Chen-Yu-Lan watershed in Taiwan, during events of Typhoon Sinlaku (September 2009) and Typhoon Morakot (August 2009). The critical hazard potential (Hc) and critical fragility potential (Fc) were introduced to express the probability of exceeding a damage state of landslides under certain conditions of rainfall intensity and accumulated rainfall. Case studies at Shenmu village in Taiwan were applied to illustrate the proposed method of landslide potential assessment and the landslide warning in practice. Finally, the proposed risk assessment for landslides can be implemented in the disaster response system and be extended to take debris flows into consideration altogether.

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