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  1. ramzerimar

    Engineering Job experience or pursue a Master (Computer Vision)?

    I intend to finish my bachelor in Computer Science 3 years from now, by which time I will be 24 years old. I'm very interested in technology and cutting edge fields like Computer Vision/Machine Learning, and I would like to work with something like that in the future. Not necessarily with...
  2. ramzerimar

    Engineering Is Computer Engineering "inferior" to EE and CS?

    I've heard some people saying that Computer Engineering is not highly valued by employers because it typically doesn't delve too deep in electrical engineering essentials (at my college, CompE's takes Circuits classes, Digital Systems, some microcontroller classes, electromagnetics and basic...
  3. ramzerimar

    Programs Switching major to EE: is this a good move?

    I'm currently enrolled in a MechE course, at my third year, and it took a long time to discover that this is not the major for me. In my spare time, I've been learning electronics (Arduino) and programming, and I decided that I like this stuff better than my MechE classes. Most of my interest...
  4. ramzerimar

    Engineering MechE working with software?

    I'm at the third year of my MechE course, and in those three years I've developed a keen interest in software/coding. I still like my degree, things like fluid dynamics/aerodynamics fascinate me, but more and more I see myself working with software and coding. One of the things that I like about...
  5. ramzerimar

    Courses Is CFD fluid mechanics + computer science?

    I'm having fluid dynamics classes right now and I'm enjoying it very much (much more than my solid mechanics classes, by the way). Also, I do like programming and computer science, and CFD looks like a very interesting field. I'm developing a real interest for it. One question for those who are...
  6. ramzerimar

    Explain to me the flaw in this perpetual motion scheme

    Someone showed this to me, and I'm struggling to explain why this perpetual motion scheme is impossible. A picture: Basically, this is a cylinder within a large reservoir, with water at the level of the reservoir water level. The mass would be dropped and then reach the bottom of the cylinder...
  7. ramzerimar

    When are the Navier Stokes equations invalid?

    I'm studying the Navier Stokes equations right now, and I've heard that those set of equations are invalid in some situations (like almost any mathematical formulation for a physics problem). I would like to know in which situations I cannot apply the NS equations, and what is the common...
  8. ramzerimar

    How is the moment of inertia of airplanes measured?

    I know it's possible to use a trifilar pendulum to extract information on moments of inertia by measuring the period of oscillation. I've seen this test being executed on small aircraft, like in this video. But I wonder how do is the momement of inertia calculated on big aircraft, like a Boeing...
  9. ramzerimar

    Engineering Opening a CFD consulting firm?

    I've been thinking about entrepreneurship in the engineering field. Unlike other fields like computer science, where small companies with small investments often end up becoming huge business, engineering is usually a very expensive thing. So consulting is a way for those who don't want to work...
  10. ramzerimar

    Other Want to study higher level engineering

    Hello, I'm currently majoring in ME with keen interest in fields like mechanical vibrations and fluid dynamics/aerodynamics. There is a ton of stuff that I want to learn in those fields that aren't typically in the subjects of a ME course. I want to work doing CFD and FEM analysis for vibrations...
  11. ramzerimar

    Mechanical vibrations + Aerodynamics?

    I'm now taking classes on mechanical vibrations and fluid dynamics, and those are two fields that are very interesting to me. I've always liked the subject of aerodynamics, but now I'm really liking to study mechanical vibrations, very interesting field of study. I'm looking for some specialty...
  12. ramzerimar

    Strength of materials vs Theory of Elasticity

    In mechanical engineering we have various courses in strenght of materials, and I've noticed that graduate students learn the Theory of Elasticity. I've researched a little bit about it, and I know that the Theory of Elasticity is more general than strenght of materials. But I have some doubts...
  13. ramzerimar

    Shaft in torsion?

    I have some conceptual doubts about shafts subjected to torsion. When studying Strenght of Materials, to find stress and strain in power transmission shafts, we consider that one of the ends of the shaft is fixed, with all degrees of freedom restricted, and the other one is receiving torque. I'm...
  14. ramzerimar

    The Boundary Element Method?

    Hello! I'm starting a project with one of my professors at college whose subject is the Boundary Element Method. I've studied a little bit of Finite Element Method, but BEM is new to me. This project will envolve a lot of programming in Python and Matlab. I would like to know how does BEM...
  15. ramzerimar

    Calculations for weight-lifting motor...

    The project I'm building involves a 12 V electric motor connected to a spindle lifting a 20kg weight. The radius of the spindle is 2cm, so the torque applied by the weight is 0,02m*20kg*9,8m/s^2, which gives me 3,92N*m. So, my 12 V motor needs to deliver 3,92N*m just to keep the weight steady...
  16. ramzerimar

    Dynamics problem: Crankshaft angular speed?

    Homework Statement Homework Equations Kinematic theorems: The Attempt at a Solution Ok, I'm trying to use another angle, phi, and find some relation betwen phi and theta so I can derive the equation for the angular velocity of rod B with respect to S, but I'm stuck at that point. How...
  17. ramzerimar

    Project: Speed and force control of a linear actuator

    My background is in mechanical engineering, but I'm working on a project for which I need to design a control system for a linear actuator. I want to design the actuator using a roller screw mechanism, which in turn will be conected to a 3 horsepower electric motor through gear reduction. I need...
  18. ramzerimar

    Is entropy real or just a construct?

    When we talk about entropy, we say it comes from our inability to completely describe the state of a system. Also, we say it is a property of the system (like entalphy). That's confusing me a lot. If entropy is a property, how can it come from our inability to describe the system? Or it's just a...
  19. ramzerimar

    SpaceX About the SpaceX Interplanetary Transport System

    I know mars colonization is a hot topic these days, and there are a lot of threads on this topic, but I would like to discuss specifically the SpaceX Interplanetary Transport System. There's a video on the subject here. On a recent thread that I posted here, some people came to the conclusion...
  20. ramzerimar

    I Finite Element Method: Weak form to Algebraic Equations?

    Okay, I'm following a series of video lectures on applications of finite element method to engineering, and the tutor started by demonstrating the mathematical background of FEM using a simple heat transfer problem. He derived the governing equation (in just one dimension): (1)...
  21. ramzerimar

    Where does natural frequency comes from?

    I know everything has a natural frequency that is a intrinsic property to the body in question. For example, a string vibrating has the largest amplitudes when it's vibrating near it's natural frequency, and the same thing happens with other things too (like the Tacoma Bridge). Natural...
  22. ramzerimar

    I Laplace's Demon and determinism

    Not sure if this is the correct forum to post this thread, but here we go. I'm a layman in physics and mathematics, and recently, I was reading about the Laplace's Demon and how, according to classical mechanics, the future could be entirely determined if some entity (the Demon) could have...
  23. ramzerimar

    Books on structures of rockets and spacecraft?

    I've been looking after some good books dealing with structural engineering of rockets and spacecrafts in general. I know that Rocket Propulsion Elements is a good book on rocket science, but I'm looking not only for propulsion but more specifically for structural design (loads, stress...). Do...
  24. ramzerimar

    Aerospace transferable skills?

    I would like to know what are some transferable skills a mechanical engineer working in the aerospace industry for some years could bring to other engineering areas (like renewable energies, oil and gas, structures, manufacture...). Preferably, areas of expertise in the field of fluid...
  25. ramzerimar

    Dynamics problem: determine maximum angle for equilibrium

    Homework Statement A uniform bar with lenght c can slide a cylindrical surface with a radius of r. Determine the maximum angle theta that guarantees the equilibrium of the bar if the friction coefficient at the points of contact is u. Homework Equations Friction force = u*N (where N is the...
  26. ramzerimar

    Does the eletromagnetic field exists everywhere?

    Okay, so we learn in basic physics that electric fields are created by charges and that magnetic fields are created by moving charges. After that, we learn that those two are just two faces of the same coin: the electromagnetic field. Also, we know that electromagnetic waves travel trough the...
  27. ramzerimar

    I What's the feasibility of space mining companies?

    Recently, I've been reading about those space mining companies (like Deep Space Mining and Planetary Resources), and from an amateur point of view, I thought that the overall idea was pretty interesting. I mean, the concept is that they would be mining resources that could be useful in space...
  28. ramzerimar

    Engineering Planning for a career with a Master's Degree [Counseling]

    I'm aware that a huge percentage of engineers (especially mechanical engineers) end up working in positions that require almost none of the knowledge they acquired during undergrad. I know that college isn't work, but I'm interested in pursuing a career that, at least, requires me to use some of...
  29. ramzerimar

    Engineering Which engineering jobs are the most technical?

    Most of the engineers I know are currently working in positions that are not strictly related to their majors (things like supply chain management, sales...). Looks like there are more job opportunities in those areas. That doesn't really appeal to me, since I like to deal more with simulations...
  30. ramzerimar

    Is Machine Design important for Aerospace Engineering?

    I'm a Mechanical Engineering student intending to pursue a Master's Degree in Aeronautical Engineering after college, and Machine Design is one of the disciplines I'm going to take next year. I understand the importance of various topics in mechanical engineering to an aircraft project (topics...
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