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A Lens-Free Imager (LFI) is one of promising candidates for massive visual inspection systems in biology and medical science. In a practical application, millions of samples need to be inspected in a short period of time, which a single Lens-Free Imager (LFI) system cannot accomplish. Therefore, we propose a high performance parallel LFI system called RALFIE (Real-time Advanced LFI Evaluation system)...
Domain Name System (DNS) is one of the most important services of the Internet since most communications normally begin with domain name resolutions provided by DNS. However, DNS has vulnerability against some kind of attacks such as DNS spoofing, DNS cache poisoning, and so on. DNSSEC is an security extension of DNS to provide secure name resolution services by using digital signature based on public...
Recently, spoofed e-mails become sophisticated and the messages that cannot be identified by visual confirmation have been increasing. DKIM is one of the most famous methods as countermeasure of spoofed e-mail. However, since DKIM allows a signature by third party domains, a recipient server can be unable to determine whether the attached signature is the legitimate. To solve the problem, although...
The widespread computers in all over the world are connected with each other via the Internet and their communications normally begin with domain name resolutions which are mainly provided by DNS (Domain Name System). Recent cyber threats to DNS system attract much attentions of DNSSEC (DNS Security Extensions) which can provide secure name resolution services. However the high workload on DNS full...
With the spread of mobile devices, demands for high speed and stable communication have been growing. However wireless communication has a feature that is susceptible to the surrounding environment. For instance, many packet losses occur caused by the radio wave interference or attenuation. Recent many mobile devices have multiple wireless network interfaces. Multihoming improves throughput by connecting...
In the present paper the static lubrication characteristics of a slider flying over a running boundary wall with arbitrary local temperature distributions are analyzed using the thermomolecular gas-film lubrication (t-MGL) equation. We obtain two approximate solutions: (a) a linearized solution when the temperature deviation is small ( $$ \tau_{W} \ll 1 $$ τ W ≪ 1 ) and arbitrarily distributed,...
Tempfailing is widely used in many organizations as anti-spam technology. However, this technology causes a serious problem: it imposes long delays in mail delivery. To solve this problem, another technique called 5-Way Handshake was proposed, but its conventional implementation has a serious drawback. Based on the MX fallback mechanism defined by RFC5321, a legitimate sender must access MX hosts...
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