Two-way digital driver/receiver uses one set of lines

Two-way /bilateral/ digital driver/receiver system using MOS circuits was designed for a multiprocess computer having several subsystems at relatively close locations. The system requires only a single set of communication lines between subsystems, thus achieving lower cost with increased reliability

Granular discharge rate for submerged hoppers

The discharge of spherical grains from a hole in the bottom of a right circular cylinder is measured with the entire system underwater. We find that the discharge rate depends on filling height, in contrast to the well-known case of dry non-cohesive grains. It is further surprising that the rate increases up to about twenty five percent, as the hopper empties and the granular pressure head decreases. For deep filling, where the discharge rate is constant, we measure the behavior as a function of both grain and hole diameters. The discharge rate scale is set by the product of hole area and the terminal falling speed of isolated grains. But there is a small-hole cutoff of about two and half grain diameters, which is larger than the analogous cutoff in the Beverloo equation for dry grains

High-temperature LM cathode ion thrusters Quarterly progress report, 5 Feb. - 4 May 1968

Poiseuille flow measurements for high temperature liquid metal cathode ion thruster

Our Town: A Heartland Lynching, A Haunted Town, and the Hidden History of White America

Review of: Our Town: A Heartland Lynching, a Haunted Town, and the Hidden History of White America, by Cynthia Carr

Farm Diversification in Relation to Landscape Properties

Current European Common Agricultural Policy (CAP) has been moving from production support subsidies to direct decoupled income support. The emergence in policy making of the concept of multifunctional agriculture leads to the recognition that a farmer produces more than food: he produces jointly both commodity and non-commodity goods. Environmental contracts were developed in order to encourage the provision of non-commodity goods such as landscape or biodiversity. Next to these contracts, other activities as for example recreation can be observed. They are the result of farm diversification. The role of location in farmers’ decision making to diversify is pointed out in literature but geographical information is generally reduced to the location within a political delimitation unit the empirical work. Objective of this paper is two-fold. Firstly, it addresses the role of location, in term of site specific natural conditions as well as neighbouring emerging dynamics in farmer’s decision making to diversify. Attention is paid to number of activities as well as the specific types of activities, notably green services, daily recreation and other farm-linked services. Secondly, this paper introduces income from agriculture explicitly allowing testing short term price sensitivity. It was found that attractive landscape is a driver for diversification as these landscape offer more opportunities. Furthermore, diversification is responsive to price. Thirdly, role of density of past multifunctional activities in the neighborhood influences farm diversification: multifunctional activities create an externality effects as new activities emerge next to already existing ones. This dynamic may lead to the emergence of ‘multifunctional hotspots’ in landscape.Farmer diversification, landscape services, location, Farm Management, Land Economics/Use,

The Bellevue War: Mandate of Justice or Murder by Mob: A True — and Still Controversial — Story of Iowa as the Wild West

Review of: "The Bellevue War: Mandate of Justice or Murder by Mob? A True - and Still Controversial - Story of Iowa as the Wild West,"by Susan K. Lucke

The Catholic Church in Southwest Iowa

Review of: The Catholic Church in Southwest Iowa, by Steven M. Avella

Our Town: A Heartland Lynching, A Haunted Town, and the Hidden History of White America

Review of: "Our Town: A Heartland Lynching, a Haunted Town, and the Hidden History of White America," by Cynthia Carr