The development of a practical magnetic tunneling junction (MTJ) ten years ago allowed the creation of a new class of non-volatile memories. This technology may offer superior resistance to total ionizing dose and virtually unlimited write endurance, making it more attractive than flash memories for space applications. Although a number of manufacturers are developing high-density bulk magnetic...

Phase diagrams as a function of anisotropy D and magnetic field H are obtained for discommensurations and surface states for an antiferromagnet in which H is parallel to the easy axis, by modeling it using the ground states of a one-dimensional chain of classical XY spins. A surface spin-flop phase exists for all D, but the interval in H over which it is stable becomes extremely small as D goes...

The relative stability of cholesterol in cellular membranes and the thermodynamics of fluctuations from equilibrium have important consequences for sterol trafficking and lateral domain formation. We used molecular dynamics computer simulations to investigate the partitioning of cholesterol in a systematic set of lipid bilayers. In addition to atomistic simulations, we undertook a large set of ...

The rates of spontaneous interbilayer and transbilayer exchange of [3H]dimyristoylphosphatidylcholine ([3H]DMPC) were examined in DMPC and DMPC/dimyristoylphosphatidylethanolamine (DMPE) large unilamellar vesicles in the liquid-crystalline-, gel-, and mixed-phase states. DMPC desorption rates from either gel or liquid-crystalline phases containing DMPE are very similar to the corresponding rate...

Memory elements play a vital role on Digital World. In memory devices the most important factor is power consumption. Because the power consumption of the memory device increases means, the device reliability and life time is reduced. The basic memory elements of designer considerations are Latch and Flip-flop. In this paper we design SRAM using arrays of flip-flops and we analyze the design of...

Flip-flops is critical timing elements in digital circuits which have a large impact on the circuit speed and power consumption. The performance of flip-flop is an important element to determine the efficiency of the whole synchronous circuit . In an attempt to reduce power consumption in flip-flops a low-power flip-flop (FF) design featuring an explicit type pulse-triggered structure and a mod...

The transmembrane distribution of phospholipids plays an important regulatory role in human erythrocytes. Membrane-bound translocase enzymes maintain an asymmetric phospholipid distribution across the membrane monolayers by promoting transmembrane diffusion or flip-flop. Mechanistic understanding of the flip-flop process is weak at the molecular level. Recently, we discovered that amide and sul...