Study on 1600 servants of 26 various companies, production units belongs to General Corporation Electricity of Vietnam (EVN) during 4 weeks, in 2004. The most common diseases included acute diseases (hay fever 16.6%), otorhinolaryngologic diseases (25.5%), and dental diseases (15.7%), especially the rates of accidents, trauma increase twofold compared to the rates of whole country (2.6% vs. 1.2%). The number of ill stages was 1.76/person/year and the rate of sick servants who workless was 3.62%, higher than rate of whole country and other industries. The percentage of civil servants having 1 and 2 types of health was 77.4%, bad health of 4 and 5 types was 4.4%.
Health ; Electricity ; Vietnam

Nanogenerator (triboelectric nanogenerator and piezoelectric nanogenerator) has experienced a rapid development since it was proposed. This technique can covert various mechanical energies into electric energy, including human motion energy, wind energy, acoustic energy and ocean energy. The converted electricity can be used for health monitoring and physiological function regulation, such as pulse detection, bioelectrical stimulation and cardiac pacing. This review summarizes the structure, working mechanism, output performance of nanogenerator and its latest progress in circulatory system, nervous system, biological tissue, sleep and rescue system. Additionally, a further analysis was also made on the application challenge of nanogenerator in clinical treatment. In the future, nanogenerator is expected to be an auxiliary power source, or even to replace battery to power medical electronic device and realize the self-powered health monitoring and physiological function regulation of human body.
Electric Power Supplies ; Electricity ; Humans

This paper introduces the temperature rising experimental process and some matters needing attention when the transformer is normally loading. And an analysis of the uncertainty for transformer's temperature rising is also made based on the practical examples' data.
Electricity ; Equipment Safety ; Temperature ; Uncertainty

China ; Conservation of Natural Resources ; Electricity

As a novel tumor therapy, pulse electric field has shown a clinical perspective. This paper reviews the characteristics of tumor ablation by microsecond pulse and nanosecond pulse electric field, and the research advances of anti-tumor immune response induced by pulse electric field ablation. Recent researches indicate that the pulse electric field not only leads to a complete ablation of local tumor, but also stimulates a protective immune response, thereby inhibiting tumor recurrence and metastasis. These unique advantages will show an extensive clinical application in the future. However, the mechanism of anti-tumor immune response and the development of related tumor vaccine need further studies.
Ablation Techniques ; Electricity ; Humans ; Neoplasms ; immunology ; therapy

This paper introduces the principle of invert transformer of high frequency X-ray machine, and analyzes its main constitution. Meanwhile, a scheme based on SG3525 for closed loop voltage regulation is given. The experimental result testifies its efficiency and utility.
Electricity ; Equipment Design ; Radiography ; instrumentation ; X-Rays

This paper describes 5 national standards related to the term on the residual voltage with different indicators. Compare the advantages and disadvantages of various test methods. Finally, give suggestions on improving the testing method.
Electric Capacitance ; Electric Impedance ; Electricity ; Reference Standards

This article presents several common problems.of medical injection pump through one case of ESD troubleshooting. Expounds the causes of the problem and provides solutions.
Equipment and Supplies ; Injections ; instrumentation ; Static Electricity

This study aims to analyze and improve Howland current source circuit and to study the constant current source of alternating current with high output impedance and high stability. A simulation study was carried out on the constant-current characteristics of Howland current source from two aspects of resistance match value and the selection of Op amp parameters, and then the output impedance was analyzed. The simulation experiment showed that when it was with the best matched resistance, the constant-current characteristics of Howland current source was better. Op amp parameters could affect the constant-current characteristics of Howland current source. In Howland current source circuit, the current source after parameter optimization had better output impedance and load capacity. The results showed that there was the best matched resistance in the selection by Howland current source. The Op amp with large broadband, high slew rate and open loop gain, and wide range of power supply voltage is more suitable for the bioelectrical impedance detection circuit.
Electric Impedance ; Electric Power Supplies ; Electricity

The environmental test for medical electrical equipment may be interrupted by power cut or the equipment broken and so on. For the purpose of standard and valid testing, this paper puts forward a project about how to deal with the interrupted disposal of environmental test for medical electrical equipment. The project aims at the environmental requirements and test methods for GB/T 14710--93.
Electricity ; Environment ; Equipment Safety ; methods ; standards