During vessel evolution in angiosperms, scalariform perforation plates with many slit-like openings transformed into simple plates with a single circular opening. The transition is hypothesized to have resulted from selection for decreased hydraulic resistance. Previously, additional resistivity of scalariform plates was estimated to be small – generally 10% or less above lumen resistivity – ba...

helicopter-borne electromagnetic (hem) is a fast and high resolution airborne electromagnetic (aem) method that is frequently used for imaging of the subsurface resistivity structures. this is a versatile and cost effective method, frequently has used in mineral and groundwater exploration and various environmental problems. modern frequency-domain hem systems utilize small electromagnetic, mag...

The effect of film thickness on the structural- and electrical-properties is investigated in Co 2 FeAl 0.5 Si (CFAS) thin films thickness, t, range 12–75 nm. These are grown by ultrahigh vacuum dc magnetron sputtering Si(100) substrates with SiO buffer layer (300 nm), at substrate temperature 500 ◦ C. GIXRD patterns reveal that B2 structural order decreases increasing t. t = 75 nm has sizable A...

We show that the strain-induced resistivity anisotropy in the tetragonal state of the representative underdoped Fe arsenides BaFe_{2}As_{2}, Ba(Fe_{1-x}Co_{x})_{2}As_{2} and Ba(Fe_{1-x}Ni_{x})_{2}As_{2} is independent of disorder over a wide range of defect and impurity concentrations. This result demonstrates that the anisotropy in the in-plane resistivity in the paramagnetic orthorhombic stat...

The synthesis and crystallographic, thermodynamic, and transport properties of single crystalline Rh 9 In 4 S 4 were studied. The resistivity, magnetization, and specific heat measurements all clearly indicate bulk superconductivity with a critical temperature, T c ∼ 2.25 K. The Sommerfeld coefficient γ and the Debye temperature(Θ D) were found to be 34 mJ mol −1 K −2 and 217 K, respectively. T...

In this study, the structural and electrical properties of Ni49-xVxMn37Sn12B2 (x = 0, 1, 2, 3) ferromagnetic shape memory alloys were investigated. According to XRD analyzes at room temperature, x=0 sample was in martensite phase, x=1 2 samples mixture x=3 austenite phase. The resistivity analyses depend on temperature showed that all exhibited martensitic transformation phase decreased with V ...

The problem of an electron gas interacting via exchanging transverse gauge bosons is studied using the renormalization group method. The long wavelength behavior of the gauge field is shown to be in the Gaussian universality class with a dynamical exponent z = 3 in dimensions D ≥ 2. This implies that the gauge coupling constant is exactly marginal. Scattering of the electrons by the gauge mode ...

We theoretically study the Coulomb drag in graphene when there is a temperature difference between layers. Within degenerate limit for equal layer densities, we find that this can lead to significant deviations from usual quadratic dependence of resistivity. The exact behavior depends strongly on phase space available intraband scattering, and not symmetrical temperatures layers are interchange...