Calculus Jobs

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Fixed-Price - Entry Level ($) - Est. Budget: $65 - Posted
I'm looking for an engineer to develop a set of piecewise equations for computing the stress field around a shaped hole in an infinite plate. The hole shall take the form of compound ellipses, which intersect at a points of equal slope (see attachment). The analyst will assume that the stress field of each of the compound ellipses will behave independently from one another. Verification of equal stress state at the intersection of the ellipses is required. The assumption will be further validated with finite element modeling in future work. The stress field around the perimeter of the ellipse will be a function of theta and will include the following parameters: R = Ratio of A-to-B (0<R<inf) M = curvature at intersection, squareness (-inf<M<0) The stress field around an elliptical feature can be found from a reference such as Peterson's Stress Concentration Factors, or other locations on the internet (e.g. http://www2.mae.ufl.edu/haftka/adv-elast/lectures/Sections14.1-2.pdf). The developed equations will be used to optimize the length-to-width ratio and squareness of such a hole in a known biaxial stress field, using stress superposition in a fatigue-critical application. Applicants should provide proposal with: 1. Estimated cost 2. Estimated number of hours to perform work 3. Soonest possible start date and associated finishing date >>>DELIVERABLE<<< The deliverable will be a PDF document with the derivation of a piecewise equation for the stress field around the perimeter of a shaped hole, as described in the attachment.
Skills: Calculus Geometry Mechanical Engineering Physics
Fixed-Price - Intermediate ($$) - Est. Budget: $20 - Posted
I am looking for an experienced person having sound knowledge of relational calculus. I need someone to provide me a step by step result of intermediate steps involved in a relational calculus. ... I need someone to provide me a step by step result of intermediate steps involved in a relational calculus. I will be providing an expression (using universal quantifier) and a small database sample.
Skills: Calculus Relational Databases
Fixed-Price - Expert ($$$) - Est. Budget: $135 - Posted
We have a inventory text file that we generate daily. It includes UPC, SKU, product name, quantity along with other information that is not applicable. We would like to upload this file every day in the system and it should shoot back which items are out of stock, meaning they are no longer on the file, and items that are under 15 should be a separate report, from 15-50 should be another report, and another report for items that are 50-100 in quantity. The items that are newly in this filter should be on top. Meaning the items that were yesterday also below 15 should be on the bottom of the file. As opposed to items that became 15 today should be on top) Also another report just to highlight of what items got changed from yesterday until today. should highlight more and less in different colors. (for example more should be red, and less should be yellow) Also want another report what wasn't there yesterday but is there today. I should also be able to select an older file and compare to todays file. Or compare any two files that we need. Reports should be in xls
Skills: Calculus Microsoft Excel
Fixed-Price - Intermediate ($$) - Est. Budget: $750 - Posted
Freelancer must be fluent in LaTeX and TikZ, and able to produce high-quality images and text at a high pace; knowledge of calculus is essential! Right now I need various graphs, with various curves, labeled points, shaded regions, tangent lines, etc.
Skills: Calculus LaTeX
Hourly - Entry Level ($) - Est. Time: 3 to 6 months, 10-30 hrs/week - Posted
Ukraine location is preferred but not limited. People from countries that were parts of USSR are also considered. I need ukraine/russian speaking person who likes to do any engineering task like PCD drawing or conversion, electric circuits calculation, researches of any concurrent products, finding analogue devices, circuit modelling; developing desktop, embedded and web software, debugging, etc. The person should not know all these technologies, just have basic knowledges of the electrics circuits and software and have much wishes of self-studying and self-development. Experience is not important. Part-time employment for the first time.
Skills: Calculus Agile software development PCB Design Scientific Research