Subnormal weighted translation semigroups

AbstractA weighted translation semigroup {St} on L2(R+) is defined by (Stf)(x) = (φ(x)φ(x − t))f(x − t) for x ⩾ t and 0 otherwise, where φ is a continuous nonzero scalar-valued function on R+. It is shown that {St} is subnormal if and only if φ2 is the product of an exponential function and the Laplace-Stieltjes transform of an increasing function of total variation one. A necessary and sufficient condition for similarity of weighted translation semigroups is developed

Injectable Famphur for Control of Grubs in Cattle

Grubs are a major pest of cattle and cause considerable economic loss to the cattle industry. Running of cattle and standing in available water sources during heel fly strikes no doubt are reflected in lighter weaning weights of claves because of reduced grazing time and cows becoming separated from their calves. Other losses to producers and feeders include possible reduced feedlot performance by grub infested animals, weight loss and down grading of carcasses that are trimmed to remove areas damaged by grubs and a lower value for hides due to grub holes. Several effective products and methods of treatment are available for control of grubs. Timely administration of a proper dosage to all animals from problem areas is necessary for effective control

Effects of Monensin on Dietary Protein Needs and Nonprotein Nitrogen Utilization by Growing Feedlot Cattle

The objectives of this experiment were to study the possible protein sparing effects of monensin in a growin ration composed primarily of corn silage and to determine its effects on the utilization of urea

Soybean Meal or Urea During Feedlot Adaptation and Growing of Calves

This experiment investigated the response by calves to different levels of protein during the first four weeks of feedlot adaptation using soybean meal, urea or a combination of the two sources. Following the adaptation period, the calves were continued on experiment for a growing phase to compare soybean meal and urea as supplements to corn silage

Diethylstilbestrol, Synovex or Zeranol Implants for Finishing Steers

Comparisons between DES, Synovex and zeranol implants and a nonimplanted control under various conditions of growing and finishing are more limited. The experiment reported here is a continuation of research comparing implants of the three products during feedlot finishing of steers

Roughage Quality and Protein Supplementation with High-Concentrate Rations for Finishing Cattle

Feedlot cattle have been shown to make high rates of gain with low feed requirements when fed all-concentrate rations during finishing periods up to 6 months or more. However, some roughage has frequently been reported to improve weight gain and to reduce digestive problems associated with all-concentrate rations. Roughage levels of 8 to 10% have appeared adequate for these purposes and are considered to be about optimum on basis of weight gain and feed efficiency. Questions are often raised as to the importance of roughage quality when included in rations at these low levels

Methods of Vitamin A Supplementation for Fattening Beef Cattle

The objective of this experiment was to study the effects of administering vitamin A through a mineral supplement or injection on feedlot performance and liver storage of vitamin A. The feeding trail was conducted at James Valley Agricultural Research and Extension Center near Redfield during the summer and fall of 1977. The present study also involved a comparison of conventionally-dried, solar-dried and acid-treated corn. Feedlot performance results for these treatments have been reported in the 1978 Progress Report of the Center