A recent study by the University of Manchester in the United Kingdom showed that the use of technical means to "frequency" the brain to a certain brainwave frequency in a trial can successfully reduce the pain of volunteers. This finding may help develop the treatment of chronic pain. New therapy.
Chronic pain is plagued by many people, especially in the elderly, but there are currently limited safety and effective therapies to alleviate these symptoms. To this end, the University of Manchester researchers tried to achieve pain relief by regulating brain waves.
Alpha brain waves are one of four basic brain waves with frequencies between 7.5 and 12.5 Hz. The researchers previously found that alpha brain waves from the forebrain are associated with placebo analgesic effects and may affect the process of pain management in other areas of the brain. Researchers have speculated that if the brain can be "frequency modulated" to produce more alpha brain waves, it may alleviate people's pain.
The report, published in the Journal of European Painology on the 3rd of this month, showed that the researchers used lasers to repeat and briefly illuminate the volunteer's arm in the experiment, causing pain, and then using two methods to achieve "frequency modulation" of the brain: Volunteers were given special flash glasses, and the flash frequency was similar to that of Alpha brainwaves; the volunteers received sound stimulation in both ears, and the frequency of the sound was also within the frequency range of the Alpha brainwave.
Sprinkler irrigation and micro-irrigation automatic control equipment With the development of economy, water resources, energy shortage and labor cost increase, more and more water-saving irrigation systems will adopt automatic control. This article focuses on the advantages and classification of automated irrigation.
The advantages are as follows:
(1) It is possible to truly control the amount of irrigation, irrigation time and irrigation cycle in a timely and appropriate manner, thereby increasing crop yield and significantly improving water utilization.
(2) Saving labor and operating expenses.
(3) The work plan can be arranged conveniently and flexibly, and the management personnel do not have to go to the field at night or other inconvenient time.
(4) Since it can increase the effective working time every day, the initial capital investment in pipelines, pumping stations, etc. can be reduced accordingly.
classification:
First, fully automated irrigation system
The fully automated irrigation system does not require direct human involvement. The pre-programmed control procedures and certain parameters that reflect the water requirements of the crop can automatically open and close the pump for a long time and automatically irrigate in a certain order. The role of the person is simply to adjust the control program and overhaul the control equipment. In this system, in addition to emitters (heads, drip heads, etc.), pipes, fittings, pumps, and motors, it also includes central controllers, automatic valves, sensors (soil moisture sensors, temperature sensors, pressure sensors, water level sensors, and rain sensors). Etc.) and wires.
Second, semi-automatic irrigation system
In the semi-automated irrigation system, no sensors are installed in the field. The irrigation time, irrigation volume and irrigation period are controlled according to pre-programmed procedures, rather than feedback based on crop and soil moisture and meteorological conditions. The degree of automation of such systems is very different. For example, some pump stations implement automatic control, and some pump stations use manual control. Some central controllers are only one timer with simple programming function, and some systems have no central control. The controller, but only some of the sequential switching valves or volume valves are installed on each branch pipe.
Automated irrigation is the trend of the times. In the future water-saving irrigation projects, more and more automated irrigation systems will be applied.
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