Increasing number of information technology users allows possibility for crimes to take advantage continue increasing either directly and indirectly. Criminals often use computer devices commit crimes. This is a major concern so that the need handling digital evidences becomes significantly urgent. Therefore, forensic storage framework required managing evidences. designed by applying composite...

This paper focuses on I/O optimizations of N-hybrid (New-Form of hybrid), which provides a hybrid file system space constructed on SSD and HDD. Although the promising potentials of SSD, such as the absence of mechanical moving overhead and high random I/O throughput, have drawn a lot of attentions from IT enterprises, its high ratio of cost/capacity makes it less desirable to build a large-scal...

With areal recording density of hard disk drives (HDD) historically growing at an average of 60% per year, it is becoming increasingly more difficult to maintain the precise positioning required of the eversmaller GMR heads to read and write data. It is predicted that 100 Gb/in HDD areal density would be probably delivered by 2003. To reach such high track densities, the lower mechanical distur...

Missing position error signal sampling data in hard disk drives (HDDs) results in their servo systems having irregular sampling rates (ISRs).With the natural periodicity ofHDDs, which is related to the disk rotation, HDD servo systems with ISRs can be modeled as linear periodically time-varying systems. Based on our previous results, an explicit minimum entropy controller for HDD servos with IS...

In this study we utilize the self-sensing capabilities of piezoelectric micro-actuators in hard disk drives (HDD) to actively suppress in-plane resonance modes of the suspension in an HDD. The self-sensing circuit is based on a tunable capacitance bridge that decouples the control signal from the sensing signal in the micro-actuator. A hybrid modeling technique based on a realization algorithm ...

In a modern large-capacity magnetic hard disk drive (HDD), both fast track seeking and perfect positioning of the read/write head are required. Mode switching control (MSC) approaches are widely used to meet these requirements. This paper proposes a new approach in designing MSC with an application to HDD servo systems. The proposed scheme uses a proximate time-optimal servomechanism in the tra...

This article presents the horizontal directional drilling (HDD) as one of most suitable technique used to reduce impact on environment during submarine pipe and cable installation process, especially in coastal area shallow waters. HDD is a drill subsea tunnel or under other designated with goal pull facility through drilled underground tunnel. With development offshore natural gas wind industr...

Abstract The interfacial adhesion between microstructures is inevitable in a micro-electro-mechanical system (e.g., hard disk drive (HDD)), which may lead to complicated microtribodynamics problems. This research has investigated the effect of surface potential on and head–disk interface (HDI) an HDD. A dynamic continuum force model, where electrowetting considered, proposed evaluate interactio...

Previous literature suggests that daily changes in US natural gas (NG) futures prices and their variance can be explained by oil volatilities, storage announcements, temperature shocks. These studies measure shocks using the National Oceanic Atmospheric Administration definitions of heating degree day (HDD) cooling (CDD). We show how hourly temperatures used to better long as well much depart a...