Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1985. / Vita. Abstract. Includes bibliographical references (leaves 135-141). Also available via the Internet.

The aim of the master's thesis is to suggest a workplace for finishing and fiting parts in TOS Kuřim company. To try optimize the quality, time and costs in production of these parts and to set up this production with new CNC machine. Find a suitable option through evaluation of the costs.

A feeding trial was conducted comparing four finishing diets, typically fed in this area, two hormone implants zeranol (Ralgro) and estradiol 17-beta (compudose), and a feed additive. thirty-two Hereford steers were fed in individual pens to maintain accurate intake records. The four diets compared were: 1) a whole corn diet with a small amount of corn silage as roughage; 2) a high energy ground barley diet using corn silage and chopped alfalfa as roughage; 3) a total diet consisting of rolled barley, beet pulp, and ground alfalfa hay; and 4) a high energy rolled barley diet using corn silage and chopped alfalfa hay as roughage. All finishing diets were supplemented with a protein, vitamin, and mineral supplement containing monensin. The cattle were fed in two phases--a growing and finishing phase. The diet comparisons were conducted only during the finishing phase. The implant and additive comparisons were made over both phases. Diet had little effect on feed lot performance. Rate of gain and feed efficiency were not significantly affected. Voluntary intake of net energy for gain was significantly affected (p<.01) by diet. Cattle fed diet #1 consumed significantly more net energy for gain than cattle on diets #2, 3, and 4. The effect of diet was also significant for internal fat percent and marbling score (p<.05). Cattle fed diet #2 had the highest internal fat percent (3.06%) followed by those on diets #3 (2.6%), diet #1 (2.3%), and diet #4 (2.1%). Marbling scores were similar with cattle on diet #2 showing significantly higher (p%lt;.05) marbling scores than the other three groups. No other carcass characteristics were affected. The difference between the implants used was very small. None of the feedlot performance traits were affected. The feed additive Trigrr II produced significantly more (p<.05) efficient gains during the growing period. This efficiency was apparent during the finishing period. Average daily gains were significantly higher for Trigrr II fed cattle (p<.05). During the combined period, average daily gain and feed efficiency were both superior for Trigrr II fed cattle (p<.05). Ribeye and hot carcass weights were significantly affected also (p.01). Cattle fed Trigrr II were superior in this case. Cattle implanted with zeranol fed Trigrr II consumed significantly greater amounts of net energy for gain and had heavier hot carcass weights than estradiol 17-beta implanted cattle or zeranol x control cattle.

Abrasive finishing is a machining process which alters the surface of a workpiece to achieve a specific property. Typical abrasive finishing processes focus on geometric tolerances and surface topography. Abrasive finishing is primarily dependent on finishing forces, relative velocities, and abrasive size. The material removal rate in finishing is inversely related to the surface finish. Magnetic and electric fields have been used to control the force applied to abrasives which finish the workpiece. These processes show an increase in performance when the field is used to control the process. Field assisted finishing processes can be energy intensive and expensive. A novel finishing media is proposed which does not require a field to achieve a similar force response. This media has inherent thickening mechanisms driven by shear jamming. This shear jamming mechanism can deliver forces an order of magnitude higher than shear thickening mechanisms. This novel slurry is demonstrated as a viable finishing media with performance similar to magnetic abrasive finishing. / Thesis / Master of Applied Science (MASc)

M.S.

This is a study of the facilities and processes used in finishing wood and metal projects used in industry as compared with facilities available and the processes used in industrial arts programs in one hundred Texas schools.

No description available.

Thesis (Ph. D.)--University of Wisconsin, 1967. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

Doctor of Philosophy / Department of Animal Sciences and Industry / Joel M. DeRouchey / A total of 7,061 finishing pigs were used in 7 experiments. Experiment 1 investigated the effects of withdrawing high-fiber ingredients prior to marketing to optimize growth performance, carcass yield, and carcass fat quality. Switching pigs from a high-fiber to a low-fiber corn-soy diet approximately 15 to 19 d before slaughter restored carcass yield and partially decreased carcass fat IV compared to pigs fed the high-fiber diet until slaughter. Experiment 2 studied 30% distillers dried grains with solubles (DDGS) and 5% added fat prior to slaughter on growth performance and carcass characteristics. Adding 5% fat to finishing pig diets containing 30% DDGS approximately 20 d before slaughter improved ADG and G:F but did not overcome the reduction in carcass yield from feeding DDGS. Experiment 3 investigated the Cu source on growth performance and carcass characteristics. Increasing dietary Cu in high byproduct diets improved growth and feed intake, resulting in increased final BW and HCW for pigs fed both Cu sources. Experiment 4 examined added Cu and standardized ileal digestible (SID) lysine (Lys) level on growth performance, carcass characteristics, and carcass fat quality. Feeding 150 mg/kg Cu to pigs in the 100% SID Lys requirement diet had improved growth but in the 85 or 92.5% SID Lys requirement diet no response to added Cu was found. Furthermore, increasing SID Lys increased ADG and HCW, but added Cu did not influence growth when feeding low SID Lys. Experiment 5 investigated diet ingredient type and added Cu on growth performance, carcass characteristics, gross energy digestibility, and small intestine histology and gene expression. When comparing diet type and added Cu, pigs fed a byproduct diet with DDGS and bakery meal tended to have lower G:F and reduced HCW compared to pigs fed a corn-soy diet. Adding Cu did not influence growth or carcass characteristics. However, adding Cu to the byproduct diet improved gross energy digestibility and decreased the crypt depth in the distal small intestine. Finally, a linear programming model was developed as a decision tool for commercial swine producers to help guide pig flow decisions to maximize the return to the operation.

Master of Science / Department of Animal Sciences and Industry / Joel M. DeRouchey / Five experiments using a total of 4,470 pigs were used to determine the effects of dietary Cu and Zn source and finishing pig space allowance. Experiment 1 evaluated increasing dietary Zn from Zn hydroxychloride or ZnSO4 for finishing pigs. Increasing dietary Zn up to 100 mg/kg Zn maximized ADG and HCW with the greatest response observed during the last 37 d period when ractopamine was included in the diet. Pigs fed diets with Zn hydroxychloride had greater HCW compared to those fed ZnSO4. Experiment 2 evaluated increasing dietary Cu from either CuSO4 or a 50:50 blend of CuSO4:Cu-AA for finishing pigs. Pigs fed Cu from CuSO4 alone consumed more feed and tended to have poorer feed efficiency than those fed a 50:50 blend of Cu from CuSO4:Cu-AA. Pigs fed a 50:50 blend of CuSO4:Cu-AA had improved HCW G:F but ADG was unchanged on a live and HCW basis. Experiments 3 and 4 evaluated increasing dietary Cu from tri-basic copper chloride or a Cu-chelate for nursery pigs. In Exp. 3, increasing Cu from Cu-chelate to 150 mg/kg Cu increased ADG and ending BW. Increasing Cu to 150 mg/kg Cu increased ADFI and improved G:F. Pigs fed Cu from Cu-chelate had greater ADG, ADFI and ending BW than those fed Cu from tri-basic copper chloride. In Exp. 4, increasing Cu to 225 mg/kg Cu increased ADG and ending BW. Because ADFI was unchanged, G:F tended to be improved as Cu level increased. There were no differences detected between Cu sources for growth performance. Experiment 5 was conducted to determine the effects of increasing space allowance by pig removal or gate adjustment during the finishing period. Pigs provided 0.91 m2 had increased ADG compared with those allowed 0.63 m2 with pigs from pens provided increased space intermediate. Pigs provided 0.91 m2 had increased ADFI compared with pigs allowed 0.63 m2 and those where a pig was removed; however, pigs from pens where the gate was adjusted were intermediate. As pigs grew to the minimum predicted space requirement and were subsequently allowed more space, performance was greater than those initially provided 0.61 m2 but less than those allowed 0.91 m2.