At the 1991 West Coast Number Theory Conference, Emma Lehmer asked for proofs of the formulas on semi-symmetric cyclotomic sums that appeared without proof in D. H. Lehmer's last notebook. This note is the result. Furthermore, we show how to determine signs which Lehmer had left ambiguous. Classical cyclotomy defined the cyclotomic classes of degree e and prime conductor p = ef + 1 to be (1) C ...

Although tremendous efforts have been devoted to investigating planar single-conductor circuits, it remains challenging provide tight confinement of electromagnetic field and compatibility with active semi-conductor components such as amplifier, harmonic generator mixers. Single-conductor spoof surface plasmon polariton (SSPP) structure, which is one the most promising transmission media due ou...

Using a novel in-situ scanning tunneling microscope integrated into a 200kV transmission electron microscope (TEM), we have shown that boron nitride nanotubes (BNNTs) possess remarkable flexibility and convert from insulator to semi-conductor upon bending. To measure the electrical properties, the BNNT was bent between two gold contacts constructing a metal-semiconductor-metal circuit. The resi...

The electronic properties of a particular class of domain walls in gapped graphene are investigated. We show that they can support mid-gap states which are localized in the vicinity of the domain wall and propagate along its length. With a finite density of domain walls, these states can alter the electronic properties of gapped graphene significantly. If the mid-gap band is partially filled,th...

This article studies a hyperbolic conservation law that models a highly re-entrant manufacturing system as encountered in semi-conductor production. Characteristic features are the nonlocal character of the velocity and that the influx and outflux constitute the control and output signal, respectively. We prove the existence and uniqueness of solutions for L-data, and study their regularity pro...

This paper presents the application of quality function deployment (QFD) to process analysis. QFD has been applied in various industries since the 1960s, but traditional QFD methodologies still have many limitations. An improved QFD framework is proposed, in which, customer requirements are identified through value engineering and strategic analysis. Process mapping using the IDEF methodology i...

9 www.alliedjournals.com  Abstract— Power quality is a very important issue. Non-linear loads and semi-conductor devices connected to AC electric mains generate unwanted signals (harmonics) in the dynamics of current which are responsible for additional power losses in heat loss and the risk of equipment damage or malfunctioning. In the simulink model of shunt active filter fuzzy logic control...

In this study, the data envelopment analysis (DEA), three-stage DEA (3SDEA) and artificial neural network (ANN) are employed to measure the technical efficiency of 29 semi-conductor firms in Taiwan. Estimated results show that there are significant differences in efficiency scores among DEA, 3SDEA and ANN analysis. The advanced setting of the three stages mechanism of DEA does show some changes...

Processors used in wireless and ad hoc networks bring more strict requirements on performance and power consumption. The hardware and software need to coordinate more efficiently to meet such requirements. With the rapid development of semi-conductor technology, more memory can be integrated into the processor. ScratchPad Memory (SPM) is a kind of the on-chip memory, is a SRAM based memory with...

Changes in forehead skin blood flow during active and quiet sleep were determined in 16 healthy neonates using a recently developed semi-conductor laser Doppler flow meter with-out light conducting fibres. Measurements were carried out at a postnatal age varying from 5 hours to 7 days. The two sleep states could be distinguished in 17 recordings. The mean skin blood flow values during active sl...