The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
We have analyzed the band-stopping characteristic of non-metal periodic structures for electromagnetic wave in a microwave region. The target frequencies are 2.4 and 5 GHz bands, which are popularly used in wireless LAN in Japan. There are two types of periodic structure in this article. One is the multilayer slab (a 1D photonic crystal) and the other is the square lattice of dielectric columns (a...
The introduction of wireless communication technology into large Japanese hospitals is rapidly progressing, notably wireless LAN and wireless voice communication systems. However, many hospitals have problems, such as inadequate signal range, electromagnetic interference by waves generated inside/outside the hospital, or by devices carried in by the staff or patients. Many have problems with network...
Wireless technologies are being rapidly introduced as part of the data communication infrastructure of modern hospitals. Even though there are concerns about problems associated with wireless communication security, the demand is remarkably large. In addition, insuring that the network is always available is important. Herein, we discuss electromagnetic compatibility and security countermeasures,...
We present two examples of antenna near-field analysis for RFID inventory systems. One is the radiation characteristic of a waveguide antenna and the other is the magnetic field distribution around a loop antenna. Computer simulations are based on FDTD method. We discuss the usefulness of the numerical results for constructing appropriate electromagnetic environment in hospitals.
RFID have been used for decades, and several standards and a variety of systems for RFID tags have been developed. RFID systems have long been utilized in industry, but their use in hospitals is not yet widespread. RFID tag systems with specific applications to hospital needs have the potential for great benefit, both clinically and economically. Here, we show some typical uses of RFID in hospitals...
Wireless technologies as part of the data communication infrastructure of modern hospitals are being rapidly introduced. Even though there are concerns about problems associated with wireless communication security, the demand is remarkably large. In addition, insuring that the network is always available is important. Herein, we discuss security countermeasures and points to insure availability that...
Medical devices driven by electric power have come to be commonly used in hospitals, and rapid changes of voltage or current can easily cause them to fail. A stable and high quality power supply is indispensable in order to maintain safety in the modern clinical setting. Therefore, we investigated the quality of the power supply in a hospital and determined the tolerance of 13 pieces of medical equipment...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.