International Technology Roadmap for Semiconductors 2003の要求清浄度について － シリコンウエハ表面と雰囲気環境に要求される清浄度, 分析方法の現状について －

Wave propagation and group velocity

By L I Sedov London: Cleaver-Hume Press Ltd Pp xvi + 363 Price 105s This is really two separate books within the same pair of covers First of all Chapters 1-3, some 145 pages, are devoted to the discussion of similarity and dimensional, methods and their application to a variety of problems in mechanics and fluid mechanics

http://iopscience.iop.org/article/10.1088/0031-9112/11/6/008/pdf

Similarity and Dimensional Methods in Mechanics

Vorlesungen uber theoretische Physik Von Prof. Arnold Sommerfeld. Band 1: Mechanik. Vierte, neubearbeitete Auflage. Pp. xii + 276. 18 D. marks. Band 2: Mechanik der deformierbaren Medien. Pp. xv + 376 + 4 plates. 18 D. marks. Band 3: Elektrodynamik. Pp. xvi + 368. 18 D. marks. Band 6: Partielle Differentialgleichungen der Physik. Pp. xiii + 332. 18 D. marks. (Wiesbaden: Dieterich'sche Verlagsbuchhandlung, 1947–1949.)

/pdf/lectures-on-theoretical-physics-4m0v0ffz5s.pdf

Lectures on Theoretical Physics

A new prototype triboelectric nanogenerator with superhydrophobic and self-cleaning features is invented to harvest water drop energy based on a sequential contact electrification and electrostatic induction process. Because of the easy-fabrication, cost-effectiveness, and robust properties, the developed triboelectric nanogenerator expands the potential applications to harvesting energy from household wastewater and raindrops.

Harvesting Water Drop Energy by a Sequential Contact-Electrification and Electrostatic-Induction Process

\nPurpose\nThe purpose of this paper is to introduce an innovative theoretical, numerical and experimental investigations on the HP NGD function. The identified HP NGD topology under study is constituted by first order passive RC-network. The simulations and measurements confirm in very good agreement the HP NGD behaviors of the tested circuits. NGD responses with optimal values of about -1 ns and cut-off frequencies of about 20 MHz are obtained.\n\n\nDesign/methodology/approach\nThe identified HP NGD topology understudy is constituted by a first-order passive Resistor-capacitor RC network. An innovative approach to HP NGD analysis is developed. The analytical investigation from the voltage transfer function showing the meaning of HP properties is established.\n\n\nFindings\nThis paper introduces innovative theoretical, numerical and experimental investigations on the HP NGD function.\n\n\nOriginality/value\nThe NGD characterization as a function of the resistance and capacitance parameters is investigated. The feasibility of the HP NGD function is verified with proofs of concept constituted of lumped surface mounted components on printed circuit boards. The simulations and measurements confirm in very good agreement the HP NGD behaviors of the tested circuits. NGD responses with optimal values of about −1 ns and cut-off frequencies of about 20 MHz are obtained.\n

Analysis, design and experimentation of high-pass negative group delay lumped circuit

This paper investigates on the theorization, design, fabrication and measurement of original phase shifter (PS) operating with two-step stair phase behavior. The innovative stair PS is designed with unfamiliar stop-band (SB) negative group delay (NGD) passive circuit. The elementary unfamiliar SB-NGD topology constituted by resistive, inductive, and capacitive lumped network is described. Acting as an RF and microwave circuit, the S-matrix model is expressed in function the RLC-network parameters. Thus, the canonical form of unfamiliar SB-NGD transfer function (TF) represented by the transmission coefficient is established. The unfamiliar SB-NGD circuit equations in terms of the NGD parameters are formulated. The established theory is validated comparing the calculated, simulated, and measured S-parameters and group delays (GDs). Results with a very good agreement showing unfamiliar SB-NGD behavior are observed around the central frequency 2.45 GHz and bandwidth of 100 MHz. An innovative application of unfamiliar SB-NGD function for the communication system front-end is developed. The developed application concept of unfamiliar SB-NGD circuit is illustrated by designing a microwave device operating as a PS presenting a two-step stair response completely original behavior. The basic theory, design and implementation of the two-step stair PS concept are introduced. To validate the two-step stair PS principle, a proof of concept (PoC) is designed based distributed element based inductive and capacitive microstrip elements. The simulated and measured results of the PS PoC are in good agreement. The experimental results confirm the feasibility of two-step stair PS with phase jumping from −70°±4° (from 2 GHz to 2.3 GHz) to −104°±2° (from 2.6 GHz to 3.0 GHz). The investigated unfamiliar SB-NGD function-based stair PS is promising for future development 5G and 6G communication system.

https://ieeexplore.ieee.org/ielx7/6287639/6514899/09663177.pdf

Original Application of Stop-Band Negative Group Delay Microwave Passive Circuit for Two-Step Stair Phase Shifter Designing

An unconventional circuit modelling for 3D multilayer printed circuit board (PCB) is developed. The modelling methodology uses the tensorial analysis of network (TAN) approach. The multilayer PCB TAN model is based on the modified Kron's formalism. This unfamiliar circuit modelling is first time applied to the multilayer PCB interconnect modelling. After the diakoptics analysis of the proof of concept structure, the equivalent graph topology is established. By analogy, the posed problem to be solved can be formulated by the consideration of four-layer PCB structure. The solution is implemented in Python programming of the proposed model mathematical abstraction. The proposed unconventional TAN model is validated by comparison with a 3D EM commercial tool with very wideband S-parameter computation from DC-to-5GHz.

Modified Kron's TAN modeling of 3D multilayer PCB

Nanostructured Rare Earth Nd3+doped Nickel–Zinc–Bismuth Spinel Ferrites: Structural, Electrical and Dielectric Studies

Today the building sector consumes than third of global energy consumption. Thus, improving building envelope performance can optimize building thermal and energy efficiency. This paper introduces an original modelling of thermal dynamic in the building wall. The model will help us to understand the heat transfer mechanism of multilayer walls to better support building retrofits, in order to reduce energy consumption. The model is based on the Kron's method developed with the Tensorial Analysis of Networks (TAN). The feasibility of the model is studied with a multi-layer pieces of wall. The TAN thermal modelling methodology is described with different steps of routine algorithm. The Kron's graph equivalent model is elaborated from the Cauer thermal model applied to multi-layer structure. Then, the TAN equation traducing analytically the thermal problem is established. As results, the thermal flux through two- and five-layer of wall was determined. The effectiveness of the building wall TAN model was verified with numerical parameters from a residential building located in the north of the France, subject to a retrofit problem. The thermal loss, was estimated for different parameters of materials constituting the piece of wall, is given to perform the building retrofit strategies.

Blaise Ravelo

Papers

Analysis, design and experimentation of high-pass negative group delay lumped circuit

Original Application of Stop-Band Negative Group Delay Microwave Passive Circuit for Two-Step Stair Phase Shifter Designing

Modified Kron's TAN modeling of 3D multilayer PCB

Nanostructured Rare Earth Nd3+doped Nickel–Zinc–Bismuth Spinel Ferrites: Structural, Electrical and Dielectric Studies

Thermal modelling of multilayer walls for building retrofitting applications