Predicting Cutting Forces in Aluminum Using Polynomial Classifiers

AbstractDue to increased calls for environmentally benign machining processes, there has been focus and interest in making processes more lean and agile to enhance efficiency, reduce emissions and increase profitability. One approach to achieving lean machining is to develop a virtual simulation environment that enables fast and reasonably accurate predictions of various machining scenarios.Polynomial Classifiers (PCs) are employed to develop a smart data base that can provide fast prediction of cutting forces resulting from various combinations of cutting parameters. With time, the force model can expand to include different materials, tools, fixtures and machines and would be consulted prior to starting any job. In this work, first, second and third order classifiers are used to predict the cutting coefficients that can be used to determine the cutting forces. Predictions obtained using PCs are compared to experimental results and are shown to be in good agreement

Production and utilization of crop residues for ruminant feeding in Aliero Lga Of Kebbi State, Nigeria

An investigation of the production and utilization of crop residues for ruminant feeding in five villages within Aliero Local Government Area of Kebbi State was carried out using a structured questioner which was administered to 75 respondents. The data collected was analyzed by using simple statistical tool such as frequency distribution and percentage. The study revealed that 47.95% of the respondents were farmers with more than half (52.41%) had 5-8 members in their family. Mixed farming is common to all the respondents with cereal and legumes crops combination alongside with cattle, sheep, and goats rearing. Some crop residues such as maize stover, rice straw, etc are available all year round since they are generated both at rainy and dry season in the study area. Maize/sorghum/millet stovers and groundnut/cowpea straws plays a major part in ruminant feeding in the study area. The level of cultivation, production and utilization of crop residues as observed in this study depends on the land size, season of production and flock size amongst others. Most of the respondents (39.74%) source their crop residues from self-production and the type of crop residues are those from groundnut/cowpea straws, maize/millet/sorghum stovers and rice straws. The present study revealed the potential of crop residues not only as ruminant feeding but also as a means of livelihood among the respondents. Keywords: Production, Utilization, Crop residues, Livestock

New ultra-short acting hypnotic: Synthesis, biological evaluation, and metabolic profile of ethyl 8-oxo-5,6,7,8-tetrahydro-thiazolo[3,2-a][1,3]diazepin-3-carboxylate (HIE-124)

Ethyl 8-oxo-5,6,7,8-tetrahydro-thiazolo[3,2-a][1,3]diazepin-3-carboxylate (HIE-124, 4) is a member of a new generation of ultra-short acting hypnotics. HIE-124 (4) exhibited potent in vivo activity with a rapid onset of action and a short duration of action, with no acute tolerance or noticeable side effects. The metabolic profile of 4 is also performed. HIE-124 (4) has the potential use as a preanesthetic medication, anesthesia inducer, and could be used with thiopental sodium to maintain anesthesia for longer duration