Executive Summary
Epson.com is the main web site for Epson North America and is designed to perform as both a corporate and a major e-commerce site. As online business expanded, Epson.com began to experience inconsistent site response. Understandably, a uniform user experience was a high priority in order to meet demand and stay competitive. With the installation of WebAccelerator™, the company now supports over 1 million page views per day. Epson.com has realized a dramatic and consistent increase in response time, from an average of 75 seconds to less than one second, regardless of traffic.

The Company
Epson is at the forefront of technological invention, manufacture and sales for information-related equipment (computers and peripherals). Founded in 1942, Epson follows the principle that corporations must be able to respond to any situation and that employees must recognize the need for innovation,  speed and change. With a vast product line available for purchase online, Epson.com was in danger of becoming a victim of its own success and needed to aggressively pursue a solution to their impending growing pains.

The Problem
Server utilization was increasing, resulting in inconsistent site response. Web requests would time out at peak traffic times. The IT group had to regularly power-cycle the servers as they repeatedly locked up under load. Making matters worse, a decision was made to standardize on a single technology base for all areas of the web site. This meant the server application now had to deal with 600,000 page views per day instead of the previous 200,000. continue reading...

1 Introduction
The aim of this work is the better understanding of the physics of the aeroelastic motion of wind turbine blades in order to improve the numerical simulation of such dynamical systems. In previous works, both aerodynamic damping calculations and fully-coupled aeroelastic simulations of wind turbine blades were performed by using the CFD code EllipSys3D as a fluid flow model, and the aeroelastic code HAWC as a structural model [1, 2]. The results were compared with semi-empirical dynamic stall engineering models, such as the Beddoes-Leishman model [3]. However, the lack of experimental results in such configurations made it difficult to conclude which model was performing better. In order to clarify this issue, it was decided to come back to more basic cases for which experimental results exist in the litterature. Not many experimental campaigns exist for which the operational conditions (including Reynolds number, Mach number, etc...) are close to our concern, namely wind turbine applications. One of the rare experimental set-ups that meets these requirements is the measurements performed by Risø in the VELUX wind tunnel [4]. The airfoil profile that has been chosen for our comparative tests is the RISØ-B1-18 airfoil designed by Fuglsang et al [5].

The so-called Direct Numerical Simulation of the fluid flow dynamics (for which all the scales of the turbulent flow are simulated by the numerical code) around a turbine blade is still far out of reach of modern computers. Therefore, turbulence models have to be implemented in the numerical codes in order to reduce the computational costs to an acceptable size. Two types of turbulence modelling, which have been implemented in the Navier-Stokes code EllipSys3D, are considered in this paper. In a first place, the so-called Reynolds Averaged Navier-Stokes (RANS) approach using the k − ! SST turbulence model by Menter [6] has been implemented. The simulation of a wind turbine rotor with this model has proven to give sensible results [7] compared to the well-detailed measurements obtained during the NREL Unsteady Aerodynamics Experiment Phase VI performed by NREL at the NASA-Ames wind tunnel [8]. However, a more detailed study showed that the RANS approach alone was unable to correctly simulate the three-dimensional patterns in the flowfield around the 2D section of a pitching airfoil [9]. Conversely, the so-called Detached Eddy Simulation (DES) [10], which is a combination of a RANS approach in the vicinity of the blade and a Large Eddy Simulation (LES) in the far field, gave promising results [9].  inally, two-dimensional simulations using the k − ! SST model will be performed, mainly due to their low computational costs, and in order to evaluate the discrepancies that can be expected with such simulations compared to three-dimensional and experimental results. continue reading...

The patent exhaustion doctrine operates to exhaust a patentee’s rights following
the first authorised sale of a patented item. Once a patented article is
unconditionally sold by the patent owner or its licensee without restriction,
that article passes beyond the exclusive rights of the patent. In this way, the first
authorised sale of a patented article exhausts the patent to the extent that an unconditional
sale frees the purchaser from patent liability to use and resale the article.

While the patent exhaustion doctrine is relatively easy to state, courts tend to
hold that many sales and licensing strategies fall victim to the doctrine. On June 9
2008, the Supreme Court attempted to clarify the patent exhaustion doctrine in
Quanta Computer Inc v LG Electronics Inc by holding that the doctrine applies 1)
to the method and not just the apparatus claims of patents and 2) to sales “authorised”
by the patent holder of incomplete products that “substantially embody”
essential features of a patented invention.

Avoiding exhaustion

Field of use licensing
Licences that carve out a particular field of customer class for the licensee are commonly
referred to as field of use licences. Like territorial licences, these arrangements
have long been considered presumably lawful exercises of the patentee’s exclusionary
rights (such as making, using, offering for sale or importing) under its patent,
notwithstanding their obvious competitive ramifications. The leading case upholding
the basic legality of field of use licences is the Supreme Court’s decision in
General Talking Pictures Corp v Western Electric Co, which, while distinguished,
was implicitly adopted by the Quanta Court.

In General Talking Pictures, the patent owner had granted Transformer Company a
non-exclusive licence to sell the patented product solely for home use. The licence agreement
required Transformer Company to mark each product with a label describing the
limited field licence. Transformer Company sold the product to General Talking
Pictures with knowledge that the latter intended to use it for commercial purposes. In
addition, General Talking Pictures knew Transformer Company had no right to sell outside
the home use field. The Court held that the patent owner could sue General Talking
Pictures for patent infringement because “[t]he sales made by the Transformer
Company ... were outside the scope of its license and not under the patent.” The Court
further reasoned that both parties knew this fact at the time of the transactions. continue reading...

WLB Metaal , a sheetmetal subcontractor based in  Valkenswaard, Netherlands, has driven their Muratec Wiedeman Vectrum 3000a turret punch press with its originally provided software for 8 years. As business increased a number of problems became significant.  There was no form of automatic nesting and there had been no updates of the software for around 7 years.  Furthermore the creation and amendment of parts was extremely labour intensive and prone to error.

In 2007 WLB decided to replace their CAD and CAM systems and, after researching the marketplace narrowed their selection to two systems, one of which was the JETCAM.

Mark Meuwissen, CNC Programmer, said; “During the comparison process it was clear that JETCAM was more efficient.  It was also easy to use.  The fact that it was in Dutch languate with local language support was also important to us.

A license of JETCAM Expert 1 was supplied and installed in April 2007 by local JETCAM reseller Widenhorn Industriele Automatisering, who also supplied a license of Autopol 3D CAD software to work in conjunction with JETCAM. continue reading...