Many people eat and sleep a little in winter and hate dark mornings and short days. This is called "winter blue". Others have more serious symptoms such as sleep disorders, withdrawal symptoms, binge eating, depression, anxiety, and lethargy. These often lead to family, work, and relationship difficulties. This is a perceived problem called seasonal affective disorder (SAD). Light Therapy Lamp,Circle SAD Therapy Lamp,Portable LED Therapy Light Guangdong Jishengke Industrial Co.,Ltd , https://www.dgjskpad.com
SAD is caused by a lack of bright light in winter. The light that enters our eyes stimulates our brain and controls our daily rhythm through the production of hormones. For some people, winter does not have enough light to regulate the hormones that prevent us from getting up and sleeping, being energized, and depressed.
Basic knowledge of indoor environment testing and measurement
The basic knowledge of metrology in the chemical inspection industry includes 6 basic knowledge such as general metrology terminology, physical quantity and measurement unit, data processing and statistical analysis, measurement error and measurement uncertainty, measurement quality assurance, measurement regulations and rules. The main contents of basic knowledge for each category should be listed in the "Contents of Examination of Basic Knowledge in Measurement" table.
The measurement basic knowledge exam outline is the basis for writing, reviewing, and subsequently expanding and maintaining the measurement basic knowledge test questions, as well as the basis for forensic examination and review and measurement basic knowledge training.
The measurement basic knowledge examination outline defines the specific content that should be "mastered, familiar, and understood" for each part of the content that should be known and understood for each part. It is used for reference when determining the amount of test questions and the difficulty of test questions, and also for candidates to review And reference during training.