Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 33 for “"per-unit-length"”.
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Metodologia para representação da influência de meios externos nos parâmetros unitários de cabos subterrâneos e submarinos
… of the influence of external media in the per unit length parameters of underground and submarine cables. The per unit length expressions for the impedance and admittance were obtained using a full-wave model and then simplified considering a quasi-TEM (Transverse Electromagnetic) …
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High-frequency characterization of embedded components in printed circuit boards
… is the reduced electronic interconnection length between components. The shorter this connection, the faster the signal transmission can occur. Different high-frequency aspects of chip embedding are investigated within this dissertation: interconnections to the embedded chip, crosstalk …
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Slow-wave electrode structures for III-V semiconductor based electro-optic travelling-wave modulators
… use in these modulators are described. They are periodically loaded with narrow capacitive fins. Small pads may also be added on the ends of the fins to further increase the capacitance. If the fins are narrow, the capacitance per unit length can be increased substantially due to the fringing …
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Numerical Modeling of Multi-Conductor Interconnects for High Speed Integrated Circuits
… The methodology starts with the assumption that per unit length (p.u.l.) transmission line parameters — i.e. p.u.l. resistance R, inductance L, capacitance C, and conductance G — have been extracted using a two-dimensional RLCG extractor. The methodology relies upon a rational fitting algorithm …
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Ecological strategies of two Ranunculus species in relation to seasonal submergence
… the role of submergence in the ecology of the perennial <i>Ranunculus repens</i> and the annual <i>R. sceleratus</i>, both of which are common in seasonally submerged habitats. Evidence is presented for genetic differentiation between <i>R. repens</i> populations with respect to tactical …
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Production and Characterization of Micro-Tubular Solid Oxide Fuel Cells
… Then, investigation on rheological properties for the anode and electrolyte water-base slurries was carried out with particular emphasis to the solid loading and the concentration of slurry additives as well as temperature. In addition, thermal analyses elucidated the response of anode, …
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Microcracking Fracture Toughness for Graphite Epoxy Composite Laminates Using Finite Fracture Mechanics
… the industry cannot take full advantage of the superior strength and stiffness of composite materials until their failure mechanisms can be thoroughly understood by engineers. Recognizing the importance of such understanding, the current study was undertaken to determine the microcracking fracture …
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Novel applications of the Josephson Effect: Ferroelectric Characterisation and Capacitively Shunted Grain Boundary Junctions
… a hysteretic current voltage characteristic operating at high temperatures. A hysteretic junction with a McCumber parameter of 1.01 at 72.3K, with a critical current of 451mA and a resistance of 0.56W was achieved for a junction shunted with a 150mm2 external capacitor with a 50nm SrTiO3 …
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MORPHO-PHYSIOLOGICAL EVALUATIONS OF ALEPPO AND BRUTIA PINE SEEDLINGS UNDER TWO DIFFERENT MOISTURE REGIMES (SYRIA, AFFORESTATION, CHLOROPLASTS).
… Aleppo pine had a thicker cuticle, fewer stomata per unit length, per unit area, and per needle than Brutia pine. A significant number of Aleppo pine stomata were sealed with a waxy layer. Brutia pine had shorter needles, smaller needle surface area, a smaller surface area-to-volume ratio, and …
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Strength envelopes for deforming oceanic lithosphere with some implications for the history of lithospheric deformation of the equatorial Indian Ocean
… oceanic lithosphere inferred from laboratory experiments indicate that the oceanic lithosphere in the central Indian basin is several times stronger (≈27 TN m -1 ) than the force available to drive deformation (9±2 TN m -1 [95% confidence limits]). Thus the strength of oceanic lithosphere is …
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Interconnect capacitance extraction under geometric uncertainties
… of Laplace's equation for the calculation of the per-unit-length capacitance matrix of a multi-conductor interconnect structure embedded in a multi-layered insulating substrate and in the presence of statistical variation in conductor and substrate geometry. The proposed method is founded on the …
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Characterization and optimization of photonic devices fabricated using femtosecond laser micro-matching
… dimensional photonic devices that are able to perform their intended functions but whose loss properties are not yet well known. The first aim of this Masters thesis is to study waveguide loss. It will focus on studying and characterizing the losses of straight and circularly curved waveguides …
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Integration of signalling in smooth muscle caveolae
… the structure and function of caveolae. The papers summarized in this thesis examine the role of caveolae in smooth muscle function. Ca2+-sensitization is a contractile process depending on inhibition of myosin phosphatase activity. Here I test whether protein kinase C and Rho-associated …
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Rigorous Electromagnetic Modeling of Conductor and Substrate Losses for High -Speed Interconnect Structures
… wiring architectures vary in feature size and length, electrical material parameters, and bandwidth of operation. The electromagnetic analysis relies upon a pair of two-dimensional techniques. The analysis procedure begins with the introduction of the global surface impedance model that enables …
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The Influence of Root Geometry on Soil Cohesion and Anchoring Ability through Geologic Time
… systems of three major tree genera from these periods: Calamophyton, Lepidodendron, and Calamites. Simplified reconstructions were designed, 3D printed, and uprooted from a sand testbed to explore the effects of root geometry on anchoring ability. Force and displacement data were gathered for …
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Time-Domain Integral-Equation Based Analysis of Complex Structures Loaded With Cables
… which may be described with frequency-dependent per-unit length parameters. Field, circuit, and transmission-line solvers are rigorously interfaced at the cable connectors/loads and along the cable shields. Interfacing of the solvers results in a coupled system of equations that is solved …
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Diapycnal Mixing and Mass Transfer in Western Boundary Currents
… reveal significant diapycnal mixing between upper-thermocline and surface waters in the sector of the Stream between the Florida Straits and the Mid-Atlantic Bight. A two-box model of the nutrient-depleted surface layers (σ<sub>t</sub> < 26.8) and the nutrient-rich thermocline layers (26.8< …
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Characterizing the Respiration of Stems and Roots of Three Hardwood Tree Species in the Great Smoky Mountains
… with a newly developed system which allows periodic <i>in situ</i> measurements by using permanently installed flexible cuvettes. Temperature-adjusted CER of roots showed no diel variation. The moderate long-term changes occurred simultaneously in all species and size classes, suggesting …
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The ecology of colonial radiolarians : their colony morphology, trophic interactions and associations, behavior, distribution, and the photosynthesis of their symbionts
… on 98% of epipelagic diving stations in the period from 1977 to 1979. Measured abundances ranged from .04 to 540 colonies per m3. Colony morphology of common genera and species is described and three new shell-less species which reach a length in excess of 1 m are discussed in detail. Some …
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Nanophotonics for dark materials, filters, and optical magnetism
… for three application areas is described, a near perfect optical absorber based on a graphene/dielectric stack, an ultraviolet bandpass filter formed with an aluminum/dielectric stack, and structures exhibiting homogenizable magnetic properties at infrared frequencies. The graphene stack can be …
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