Abstract The value of utilizing multiple data sources for classifying images has long been recognized in remote sensing. However, any attempts to do so have faced enormous problems primarily due the inadequacy traditional single source analytical techniques. This paper demonstrates feasability using knowledge-based procedures provide a new scheme incorporating several classification process. two schemes presented (based on numerical and qualitative reasoning) are computationally efficient...

It has been apparent in the last few years that small non coding RNAs (ncRNA) play a very significant role biological regulation. Among these microRNAs (miRNAs), 22-23 nucleotide regulatory RNAs, have major object of study as found to be involved some basic processes. So far about 706 miRNAs identified humans alone. However, it is expected there may many more encoded human genome. In this report, "context-sensitive" Hidden Markov Model (CSHMM) represent miRNA structures proposed and tested...

Semiconductor holes with strong spin-orbit coupling allow all-electrical spin control, broad applications ranging from spintronics to quantum computation. Using a two-dimensional hole system in gallium arsenide well, we demonstrate new mechanism of electrically controlling the Zeeman splitting, which is achieved through altering wave vector k. We find threefold enhancement in-plane g-factor g∥(k). introduce method for quantifying splitting magnetoresistance measurements, since conventional...

We study the electronic structure of ${\mathrm{WTe}}_{2}$ thin films with different thicknesses. High-quality thin-film samples are obtained carrier mobility up to 5000 ${\mathrm{cm}}^{2}\phantom{\rule{0.16em}{0ex}}{\mathrm{V}}^{\ensuremath{-}1}\phantom{\rule{0.16em}{0ex}}{\mathrm{s}}^{\ensuremath{-}1}$, which enables us resolve four main Fermi pockets from Shubnikov--de Haas (SdH) oscillations. Angle-resolved SdH oscillations show that cross three-dimensional two-dimensional systems at a...

In the last decades, energy and management has grown as an important research area. Energy consumption can be significantly reduced by making people aware of their behavior consumers. this project we implement a Smart Sustainable technology adapting IoT based methodologies using plugs for capturing data which is transferred through Wireless-gateway to central database [1]. The system designed in way that switched on/off when not use from server. Due facility been enabled turn off smart apart...

The out-of-plane g-factor g([perpendicular])(*) for quasi two-dimensional (2D) holes in a (100) GaAs heterostructure is studied using variable width quantum wire. A direct measurement of the Zeeman splitting performed magnetic field applied perpendicular to 2D plane. We measure an up = 5, which larger than previous optical studies and approaching long predicted but never experimentally verified 7.2 heavy holes.

In-plane hole g-factors measured in quantum point contacts based on p-type heterostructures strongly depend the orientation of magnetic field with respect to electric current. This effect, first reported a decade ago and confirmed number publications, has remained an open problem. In this work, we present systematic experimental studies disentangle different mechanisms contributing effect develop theory which describes it successfully. We show that there is new mechanism for anisotropy...

We investigate the relationship between Zeeman interaction and inversion asymmetry induced spin orbit interactions (Rashba Dresselhaus SOIs) in GaAs hole quantum point contacts. The presence of a strong SOI results crossing anti-crossing adjacent spin-split subbands magnetic field. demonstrate theoretically experimentally that energy gap depends on interplay terms highly anisotropic g tensor, this can be tuned by selecting crystal axis along which current field are aligned. Our constitute...

Experience in the physical sciences suggests that only realistic means of understanding complex systems is through use mathematical models. Typically, this has come to mean identification quantitative models expressed as differential equations. Quantitative modelling works best when structure model (i.e., form equations) known; and primary concern one estimating values parameters model. For biological systems, model-structure rarely known modeler deal with both model-identification...

We report the design and development of a piezoelectric sample rotation system, its integration into an Oxford Instruments Kelvinox 100 dilution refrigerator, for orientation-dependent studies quantum transport in semiconductor nanodevices at millikelvin temperatures magnetic fields up to 10 T. Our apparatus allows continuous situ device through >100° two possible configurations. The first enables field within plane device, second be rotated from in-plane perpendicular plane. An...

Zeeman splitting of one-dimensional hole subbands is investigated in quantum point contacts fabricated on a (311)-oriented GaAs-AlGaAs heterostructure. Transport measurements can determine the magnitude $g$ factor, but cannot usually sign. Here we use combination tilted fields and unique off-diagonal element tensor to directly detect sign ${g}^{*}$. We are able tune not only magnitude, also factor by electrical means, which interest for spintronics applications. Furthermore, show...

Abstract A symbolic approach to the analysis of mixed data types found in spatial database a Geographical Information System is developed. Unlike statistical techniques, that are essentially based on manipulation numeric quantities, method here attempts emulate photo-interpretation by manipulating representations photo-interpretive knowledge. This representation consists mixture normal and ‘defeasible’ rules. The latter enables proceed face uncertainty making (and possibly revising)...

In two-dimensional hole systems, the Rashba spin-orbit interaction leads to a spin dependent momentum. A perpendicular magnetic field spatially separates holes with different spins, creating mass spectrometer for spin. Spin-resolved focussing has been used measure polarization from amplitude of peaks. this work, authors show that ${k}^{3}$ form term semiconductor changes scattering rate, which an exponential effect on peak amplitude. This result further demonstrates impact in physics.

We have performed transport measurements in tilted magnetic fields a two-dimensional hole system grown on the surface of (311)A GaAs crystal. A striking asymmetry Shubnikov-de Haas oscillations occurs upon reversing in-plane component field along low-symmetry [2[over ¯]33] axis. As usual, magnetoconductance are symmetric with respect to reversal aligned high-symmetry [011[over ¯]] Our observations demonstrate that an can generate out-of-plane magnetization system, creating new possibilities...

Abstract One dimensional semiconductor systems with strong spin-orbit interaction are both of fundamental interest and have potential applications to topological quantum computing. Applying a magnetic field can open spin gap, pre-requisite for Majorana zero modes. The gap is predicted manifest as dependent dip on the first 1D conductance plateau. However, disorder effects make identifying signatures challenging. Here we study experimentally numerically channel in series low p-type GaAs point...

We perform magnetic focussing of high mobility holes confined in a shallow GaAs/Al0.33Ga0.67As quantum well grown on (100) GaAs substrate. observe ballistic over path length up to 4.9 μm with large number peaks. show that additional structure the peaks can be caused by combination finite width injector point contact and Shubnikov–de Haas oscillations. These results pave way studies spin-dependent spin relaxation lengths two-dimentional hole systems without complications crystal anisotropies...

Abstract The Enterprise gas field is a discovery in Shell's operated acreage the Columbus Basin off east coast of Trinidad. It comprised two major fault blocks, with an exploration well smaller one and appraisal larger one. block further broken up by minor faults. potential compartmentalization this uncertainty development field. plan called for or wells to be drilled Detailed mapping each faults analysis log pressure data from was used determine how connected various segments are. Using...

The ability to convert spin accumulation charge currents is essential for applications in spintronics. In semiconductors, spin-to-charge conversion typically achieved using the inverse Hall effect or a large magnetic field. Here we demonstrate general method that exploits nonlinear interactions between and perform all-electrical, rapid, noninvasive detection of without need We operation this technique with ballistic GaAs holes as model system strong spin-orbit coupling, which quantum point...

The reproducible operation of quantum electronic devices is a key requirement for future information processing and spintronics applications. Traditionally, have been fabricated from modulation-doped heterostructures, where there an intrinsic lack reproducibility due to the random potential ionized donors. Here, we show that can greatly improve over by using completely undoped architecture, with superior uniformity in confinement more consistent operating voltages both electron hole devices....

We have studied the anisotropic Zeeman splitting of ID holes formed on a (100) GaAs/AlGaAs heterostructure single cooldown. The strong spin-orbit coupling and confinement gives rise to highly spin-splitting. In measuring quantum point contacts high symmetry plane, we eliminate effects crystal anisotropy our direct transport measurements find that g <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">||</sup> <sub...

In this paper we present the design, assembly and characterization of a low temperature sample rotation system based upon commercial, electrically controlled piezo rotator. This allows for samples to be rotated through angles greater than 100° within 39 mm space our Kelvinox100 dilution refrigerator, whilst maintaining below 100 mK. Preliminary transport measurements on 2DEG show that quantum effects can clearly observed rotator is active.