A hoist controlled by a computer is widely used for moving electroplates which is chemically treated in a sequence of tanks. The hoist scheduling directly a.ects the throughput of a production system. The objective of the hoist scheduling problem is to schedule the moves to maximize the throughput. This paper investigates the hoist scheduling problem, a speci2c material handling issue, in a man...

We evaluated the consumption of duckweed (Lemna minor, Linnaeus) by juvenile Blue Tilapia (Oreochromis aureus, Steindachner) through 48 hour indoor tank feeding trials. Feeding trials consisted of 5 tanks (4 treatment, 1 control). Tanks were stocked with 25 g of fresh duckweed at the initiation of each feeding trial. Designated treatment tanks were also stocked with 1 tilapia per tank. At the e...

Planktivorous fish which limit zooplankton grazing have been predicted to increase algal biodiesel production in wastewater fed open reactors. In addition, tanks with higher algal diversity have been predicted to be more stable, more productive, and to more fully remove nutrients from wastewater. To test these predictions, we conducted a 14-week experiment in Houston, TX using twelve 2,270-L op...

The objective of this study was to compare the presence on goats and cattle of adult ticks that usually infest cattle. To this end ticks collected from sets of five goats were compared with those collected from sets of five cattle at 72 communal dip-tanks in the eastern region of the Eastern Cape Province. Amblyomma hebraeum was present on goats at 25 and on cattle at 39 dip-tanks, and a total ...

BACKGROUND A five-year citywide control program based on regular application of temephos significantly reduced Aedes aegypti larval indices but failed to maintain them below target levels in Clorinda, northern Argentina. Incomplete surveillance coverage and reduced residuality of temephos were held as the main putative causes limiting effectiveness of control actions. METHODOLOGY The duration...

The ISAC Separated Function DTL is designed to accelerate ions of 3 ≤ A/q ≤ 6 to energies fully variable between 0.153 to 1.53 MeV/u. The DTL includes five IH-tanks with quadrupole triplets between tanks and triple gap split ring bunchers before tanks 2, 3, and 4. The final configuration of the DTL is due for commissioning in Dec. 2000. Recently a beam test with the first section of the DTL com...

Wastewater treatment plants affect the environment in many different ways. It can be assumed that the intensity and range of microbiological emission is the crucial factor in determining the range of restrictedusage zone. This paper presents emission levels of microbiological pollutants from the wastewater treatment plant in Bartoszyce, Poland. It is a new plant with multifunctional activated-s...

The paper addresses control related design issues for neutralization plants. Mainly for control reasons, the neutralization is usually performed in several steps (mixing tanks) with gradual change in the concentration. The aim is to give recommendations for issues like tank sizes and number of tanks. Assuming strong acids and bases, we derive linearized relationships from the disturbance variab...

-An apparatus providing continuous artificial illumination of constant intensity directed to the lower surface of flounders is pictured. Pigmentation was developed on the lower normally unpigmented surface in a high percentage of summer flounders in the following experimental situations: (1) Unoperated fishes in black tanks illuminated from below. (2) Blinded dark fishes in black tanks illumina...