PURPOSE To evaluate the ability of phacoemulsifiers with active versus passive infusion fluidics control systems to maintain target intraocular pressures (IOPs) under varying flow conditions. SETTING Alcon Research, Ltd., Lake Forest, California, USA. DESIGN Experimental study. METHODS An acrylic test chamber was used to model the anterior chamber of the eye. Two passive (gravity-based) s...

Supervisors in a less-than-truckload freight terminal establish material flows inside the terminal by assigning incoming trailers to open doors. A common scheduling strategy is to look ahead into the queue of incoming trailers and assign them to doors to minimize worker travel. We develop a model of the resulting material flows and use it to construct layouts that exploit this type of schedulin...

Lean Manufacturing concept is well described in the literature in the context of low-mix high-volume production. There are numerous case studies proving outstanding benefits of implementation Lean principles. Nowadays enterprises have to face the problem of high variety of products and dynamically changing demand. Lean tools and methods known from repetitive production do not always fit to high...

Supply chains in industry have a very complex structure. The influence of many parameters is not known. Therefore the control of the orders, material flow and stock is rather difficult. In order to recognize the basic relationships between the parameters, a very simple model was set up. It consists of 4 identical stages. In all stages the stock is closed-loop controlled to a nominal stock. Ther...

Bernanke (2005) hypothesized that a "global savings glut" was causing large trade imbalances. However, we show that the global savings rates did not show a robust upward trend during the relevant period. Moreover, if there had been a global savings glut there should have been a large investment boom in the countries that imported capital. Instead, those countries experienced consumption booms. ...

One aim of the working circle “Autonomous Cooperation and Control” within the Cooperative Research Center 637 was to ensure that the developed definition (chapter

Supply chains in industry have a very complex structure. The influence of many parameters is not known. Therefore the control of the orders, material flow and stock is rather difficult. In order to recognize the basic relationships between the parameters, a very simple model was set up. It consists of 4 identical stages. In all stages the stock is closed-loop controlled to a nominal stock. Ther...

Responding to the recent accounting scandals, the Securities and Exchange Commission (SEC) required chief executive officers (CEOs) and chief financial officers (CFOs) of large publicly traded companies to swear by their financial statements. Focusing on executive oaths that were filed by the first deadline of August 14, 2002, this study finds that stock markets, on average, reacted positively ...