Serwis Infona wykorzystuje pliki cookies (ciasteczka). Są to wartości tekstowe, zapamiętywane przez przeglądarkę na urządzeniu użytkownika. Nasz serwis ma dostęp do tych wartości oraz wykorzystuje je do zapamiętania danych dotyczących użytkownika, takich jak np. ustawienia (typu widok ekranu, wybór języka interfejsu), zapamiętanie zalogowania. Korzystanie z serwisu Infona oznacza zgodę na zapis informacji i ich wykorzystanie dla celów korzytania z serwisu. Więcej informacji można znaleźć w Polityce prywatności oraz Regulaminie serwisu. Zamknięcie tego okienka potwierdza zapoznanie się z informacją o plikach cookies, akceptację polityki prywatności i regulaminu oraz sposobu wykorzystywania plików cookies w serwisie. Możesz zmienić ustawienia obsługi cookies w swojej przeglądarce.
Partial Volume Effect (PVE), the image blurring caused by the finite spatial resolution of PET imaging system, can cause incorrect quantification of radioactivity especially for small objects. High-resolution small animal PET system has been developed for rodents, but sizes of rodent hearts are still close to the spatial resolution, that might cause significant PVE than human heart in clinic PET....
The government of Japan assumes that a large portion of renewable energy in the near future will be provided by photovoltaic generation systems installed at end consumers. Thus, smart grids in Japan will be established mainly at the distribution and the end-consumer level of power systems. Considering this situation, the Smart Grid Working Group, created inside the Cooperative Study Group on Applications...
In this paper, we present the development of an intuitive user interface for hand-held multi-DOF forceps for laparoscopic surgery. Interface design is crucial to the development of hand-held medical instruments. Surgeons may not use medical devices owing to their poor usability, regardless of their performance. In addition, most surgeons do not have the time to learn the use of robotic instruments...
The purpose of this study is to realize a practical method of providing cyber security for power system communications. Considering communication requirements needed for Smart Grids, power system communications can be classified into five main categories: real-time protection, supervisory control and data acquisition (SCADA), remote access, demand management system (DMS) and advanced metering infrastructure...
In fuel cells applications, current-ripple reduction is essential for conversion efficiency and life span. This paper analyzes the pulse-link DC-AC converter for fuel cells applications operated in zero-current-slope mode. As the result, in zero-current-slope operation mode, input-current-ripple is reduced. Furthermore, in this operation mode, the parameters of series LC circuit which is worked as...
This paper presents a flaw in the permission scheme of Android. The Android framework enforces a permission-based security policy where an application can access the other parts of the system only when the application is explicitly permitted. The security of the framework depends to a large extent on the owner of a device since the authorization decisions are mainly made by the user. As a result,...
The authors suggest the concepts of protection relay systems for operation within a Smart Grid and describe the results of a prototype development. This paper introduces each of the system characteristics that should be considered for protection operation within Smart Grid, and the evaluation methods that were applied under both normal and faulted conditions. The results of a field trial in the 66kV...
In recent years, progress in the development of communication network technology has been very rapid and Ethernet can now be applied to provide the backbone for wide area communication networks. Within this framework a Next Generation Network (NGN) that fuses mobile and fixed communication service interfaces is considered for the integration of a variety of data traffic types. This type of technology...
Networks around home electronics are a recent development. Assuming that home networks will develop in the future, we have been working on networks systems of gas appliances. This paper starts with a description of the existing state of IT usage in gas appliances and the company's efforts thus far in this field. It then introduces a home network system of gas appliances remotely controlled using the...
The purpose of this study is to realize a practical method of providing cyber security for power system communications. Power system communications can be classified into three main categories: real-time protection, supervisory control and data acquisition (SCADA), and remote access. This paper describes a concept and method of effectively applying information-theoretic cryptography to real-time protection...
Recently, DC power supply systems have been widely viewed as an energy-saving solution. The protection of the system from over current is one of the most important factors in DC power supply system. This paper presents noise current characteristics of a semiconductor circuit breaker.
This paper examines the effect of input current-ripple reduction on Pulse-link DC-AC converter for fuel cells applications. For reducing the input current-ripple, series LC circuit has been connected in parallel at the Pulse-link DC-AC converter. The input current-ripple characteristics have two main domains with combination of series LC parameters. The current-ripple level depends on inductance values...
This paper proposes a software obfuscation mechanism in conjunction with a tamper-proof module. The proposed mechanism overcomes the limitation of software-based obfuscation techniques where an obfuscated program contains critical parameters in itself. We divide a program into two parts: an obfuscated program and secret parameters. The obfuscated program is executed on a mobile phone or a computer,...
Since the source code of Android was released to the public, people have concerned about the security of the Android system. Whereas the insecurity of a system can be easily exaggerated even with few minor vulnerabilities, the security is not easily demonstrated. Formal methods have been favorably applied for the purpose of ensuring security in different contexts to attest whether the system meets...
In order that resins such as laminates may be made resistant to heat arising from the higher voltage or larger current of power device, it is necessary to make them highly thermally conductive. To make resins highly thermally conductive, it is usual to use a compound with inorganic filler. However, the thermal conductivity of matrix resins is low compared to that of ceramics. To achieve high thermal...
The purpose of this study is to produce practical cyber security for protection relay systems using communication channels, such as pilot protection schemes or wide area protection systems. This paper describes a concept and method of effectively applying unconditionally secure authentication codes (A-codes) to such protection relay systems. From the requirements of real-time communication and long-term...
In recent years, many researchers have studied on the rehabilitation robotics to assist medical staff or patients. Some kinds of haptic devices have been developed and evaluated its efficiency with clinical tests, for example, upper limb training for patients with spasticity after stroke. Almost all the devices for upper limb rehabilitation have only 2-DOF for its active motion except for wrists....
This paper mentions the input current ripple reduction method of the Pulse-link DC-AC Converter for Fuel Cells. The conventional DC-AC converter for fuel cells is interpolated large capacitor between boost converter stage and PWM inverter stage. That capacitor disturbs the size reduction of this unit. To overcome this problem, authors have proposed a novel topology called as Pulse-link DC-AC converter...
This paper considers the influence of small-series LC circuit on the input current-ripple which is inserted to pulse-link DC-AC converter for fuel cells applications. Fuel cells have drawback about current-ripple because the chemical reaction time is much slower than commercial frequency. Therefore, in these applications, the input current-ripple reduction is essential factor in the DC-AC converter...
This paper considers that the mechanism of input current-ripple on pulse-link DC-AC converter for fuel cells. And the reduction methods are shown. In general, fuel cells are weak about current ripple. The current-ripple damages to the fuel capacity and life span because the chemical reaction time when generates electricity is much slower than commercial frequency. Therefore, the input current-ripple...
Podaj zakres dat dla filtrowania wyświetlonych wyników. Możesz podać datę początkową, końcową lub obie daty. Daty możesz wpisać ręcznie lub wybrać za pomocą kalendarza.