Research Study Final Report—Electromagnetic Radiation in Life-
Research Study Final Report—Electromagnetic Radiation in Life
Topic Name : Electromagnetic radiation in life
1. Research background of the subject
In the 21st century, with the development of electronic technology, more and more power lines have been installed, such as TVs, computers, mobile phones Telephones and microwave ovens have entered our lives, bringing great convenience to our lives. At the same time, electromagnetic radiation with longer wavelengths and frequencies within 30,000MHz fills our space, destroying the good electromagnetic ecological environment and forming A new "hidden killer" in modern society. Electromagnetic radiation is everywhere, and its impact on people's daily lives is also everywhere. But most people are not aware of its hazards. Therefore, we chose this topic for research. We mainly studied the electromagnetic radiation and its hazards generated during the use of computers. We hope to learn knowledge from it, but we also hope that through our research, we can find better radiation protection methods. ways to help people.
2. The purpose and significance of the project research
The project aims to learn all aspects of electromagnetic waves: through observation and access to information, understand the generation and propagation of electromagnetic waves, and understand their Its impact on us; through the exploration of electricity and magnetism, understand its use in our lives; after analysis and discussion, explain its harmful effects and discuss corresponding radiation protection measures for these harmful effects, organize it into a manuscript, and share it with students Share research experience.
3. The content and expected goals of the project research
(1) Theoretical research:
Study the connotation of electromagnetic radiation: Electromagnetic radiation refers to energy in the form of electromagnetic waves The phenomenon of form being emitted into space from a source.
The sources of electromagnetic radiation: mainly natural radiation (natural electromagnetic radiation comes from the earth’s thermal radiation, solar thermal radiation, cosmic rays, lightning, etc.) and artificial radiation (artificial electromagnetic radiation comes from radio, television , radar, communication base stations and electromagnetic energy application equipment in industry, science, medical and daily life).
Hazards of electromagnetic radiation: There are four main hazards of electromagnetic radiation to the human body: 1. Inducing genetic mutations and promoting the production of mutant cells (1. Accelerated skin aging. 2. Various malignant diseases including leukemia Increase in tumors. 3. Decreased activity of T lymphocytes and decreased activity of B lymphocytes leads to an increase in various malignant tumors, including leukemia. 4. Decreased sperm activity and number lead to infertility. 5. Embryonic cells produce a large number of mutated cells. Developmental retardation, increased miscarriage rate in pregnant women, and increased teratogenesis rate) 2. Hormone secretion disorders (1. Reduced secretion of epinephrine and norepinephrine leads to reduced ability to resist damage. 2. Reduced secretion of growth hormone from the pituitary gland leads to developmental delay. 3. Abnormal secretion of thyroid and parathyroid glands leads to developmental disorders and abnormal bone metabolism. 4. Less pineal gland production leads to reduced immunity and biological clock disorder. 3. Neurasthenia (1. Headache, dizziness. 2. , insomnia, forgetfulness, and dreaminess. 3. Poor appetite, palpitations, and arrhythmia.) 4. Thermal effects (1. Affect the central nervous system, causing headaches, dizziness, fatigue, and drowsiness. 2. The lens in the eye becomes cloudy, leading to cataracts and even binocularity. Blindness)
(2) Practical research:
1. Investigate what electrical appliances have strong electromagnetic radiation in daily life? After investigation by our team, we learned that common electrical appliances with strong electromagnetic radiation in daily life mainly include: mobile phones, computers, microwave ovens, refrigerators, televisions and other electrical appliances
2. How to prevent electromagnetic radiation Harm to our human body? This is a focus of our group's research. After our group's research and investigation, we concluded that radiation protection mainly focuses on six aspects:
1) Don’t use all household appliances together.
2) If there is an application manual, you should follow the instructions and maintain a safe operating distance.
3) Try to avoid long-term operations.
4) Maintain indoor air circulation.
5) When electrical appliances are not in use, it is best to turn off the power supply rather than leaving it in standby mode. This not only saves power, but also reduces the accumulation of trace amounts of electromagnetic radiation.
6) Eat more foods rich in vitamin C to help regulate the electromagnetic field disorder of the human body.
3. The computer is an epoch-making invention. It brings people various conveniences in work, study, and life, but it also brings worries. People are more or less worried about long-term What are the effects of working on computers on your health, such as whether computer radiation will cause damage to the human body. In order to better understand the hazards of electromagnetic radiation released by computers and the prevention and control measures we should take, we launched a survey on computer-related issues in the second grade of high school. After our team's investigation, we learned that most people know that computers have electromagnetic radiation. radiation, and proposed prevention and control measures for electromagnetic radiation. The summary is as follows: 1) Place a pot of cactus next to the computer desk. The cactus can absorb the electromagnetic radiation emitted by the computer; 2) If the body is 71 cm away from the screen, the electromagnetic radiation it receives will be greatly reduced; 3) Do not be behind the computer Or place workbenches on both sides, because the electromagnetic radiation emitted by the back or sides of the computer is much greater than the screen in the front.
IV. The main methods and implementation process used in the project research
(1) Description of the main research methods used in the project
(1) Literature research method. At the beginning of the project research, we did not know much about electromagnetic related issues, so we needed to learn the relevant theories through literature research and learn from the experiences of others. By querying relevant newspapers, magazines, CD-ROMs, and online materials, we collect, organize, analyze and research, and understand the research trends, cutting-edge progress and corresponding results related to this topic.
(2) Action research method. According to the relevant steps of problem-plan-action-reflection, we organize some materials and outline the relationship between actions and research goals. We mainly use sample surveys to understand people's understanding of electromagnetic radiation, which can well supplement our shortcomings in the subject.
(3) Results analysis method. Collect and organize existing research results and materials (including papers, lesson examples, documents, etc.) in various aspects and summarize them.
(2) Implementation process of the project research
With the strong support of the teacher and the joint efforts of all the members of the research team, this project went through one year of continuous exploration and practice. , phased results have been formed. The following is an introduction to the research and implementation process of this topic and some of the results achieved. When we conduct research on this topic, we can roughly divide it into four stages:
The first stage (March 2010) Preparation stage:
Develop the topic plan, implement the division of labor, and invite The teacher demonstrates the design of the project research plan, organizes personnel to learn the theory of the project research, and clarifies the purpose and significance of the project research.
Second phase (April 2010) Preliminary research phase:
Since we are new to this topic, we don’t know much about electromagnetic radiation. In order to facilitate our better To study electromagnetic radiation, we first search the Internet for what electromagnetic radiation is and understand the sources of electromagnetic radiation. We carry out research activities through seminars, discussions, data analysis and other forms to promptly discover problems in the research and adjust and improve the research plan. , plan, make phased summaries in a timely manner, and initially form a research atmosphere.
The third phase (May 2010) comprehensive research phase:
Based on the previous phase, this time we focus on the impact of electromagnetic radiation on life and our human body. harm, and what measures we should take to prevent electromagnetic radiation. In order to be more conducive to our research, we conducted a questionnaire survey in the second grade of high school. And conduct timely research, evaluation and improvement on problems that arise during the research process, and write research papers.
The fourth phase (June 2006) Summary evaluation and identification phase:
After completing the discussion and research on electromagnetic radiation, we will summarize the content and conclusions of our group discussion , and collect information related to the topic, organize and analyze it, write a research report, and invite teachers to conduct topic appraisal.
V. Achievements and evaluation of the project research
In the process of the project research, with the members of the research team as the core, we successfully completed the research on electromagnetic radiation and understood The source and impact of electromagnetic radiation were understood and the radiation prevention measures discussed by our group were put forward. During the research process of the topic, each member had a clear division of labor, cooperated with each other, helped each other collect relevant information on electromagnetic radiation, sorted out some fragmentary information, and classified electrical appliances with electromagnetic radiation. Each member actively participated in the group discussion and put forward their own opinions on the prevention of electromagnetic radiation.
6. Main problems in the research
At present, although we have done some solid and effective research work on this topic and achieved some results, we They all clearly realize that there are still many issues worthy of reflection and improvement during the research process.
1. People’s understanding of electromagnetic radiation existing in life needs to be further improved.
2. Some measures to prevent electromagnetic radiation are theoretical and not very practical.
7. Research experience
In these few months of research study, we encountered many obstacles. No matter in differences of opinion or division of tasks, we encountered many difficulties. There were many obstacles. But in the end, after everyone discussed and studied, the problem was finally solved. This made us deeply realize the meaning of cooperation, unity and responsibility. Everyone has different ideas and opinions, which will cause differences among the team members. However, this It plays an important role in our research study. Because one person's thinking is relatively narrow, and everyone learns from each other's strengths and helps each other to get the most perfect results. The so-called "three cobblers are as good as Zhuge Liang." Moreover, research-based learning is not a matter of one or two people. It requires the entire group of members to cooperate and unite with a sense of responsibility.
We have achieved the purpose of research-based learning. There is no pie in the sky, and the same is true for research-based learning. There is no ready-made learning content, fixed model, or only method. This also makes our research studies more difficult and richer. This is another test to improve our learning ability and develop our innovative spirit. This time, from theme formulation, material collection, visits and surveys, to the combined use of books and the Internet, our overall quality level has been enhanced. At this stage, we have experienced the joy of unity, mutual assistance, and division of labor.
It exercises our perseverance. In the actual research and investigation process, we will encounter some problems, such as interpersonal communication in the questionnaire survey, how to make the other party understand our intentions simply and correctly, and cooperate with our investigation, etc. At this time, we will always encounter some information that is not consistent with the actual situation, so we must do it ourselves. Go to the field to investigate the information yourself. In the face of these difficulties, we were sometimes so busy that we were unable to solve them. Many times we thought about giving up, but with the mutual help and encouragement among the team members, the problem was finally solved. When the research study is completed, we are more convinced that nothing is difficult in the world, as long as there are people who are willing.