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Last updated: July 1, 2015
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  1. Nigar Ahmed

    Nigar Ahmed

    Electrical Engineering |Calculus |Algebra | NA &C | ODE

    Pakistan - Last active: 4 days ago - Tests: 1 - Portfolio: 3

    Hello I am Nigar Ahmed, PhD student at Nanjing University of Aeronautics and Astronautics in Electrical Engineering Specialization Control systems I am part time freelancer and I work on the assignments and projects related to subjects/Fields mentioned below. I work with full devotion to meet needs, criteria and especially deadline of my beloved clients so i could develop a long term relation with them and work for them on regular basis. Following are the Areas of Expertise on which i have full command and i can deliver over 90%+ in it assignments and project. For my previous result please don't hesitate to see my portfolio I look for the assignments and projects related to Electrical Engineering, Mathematics, Linear Algebra, ODE (Ordinary Differential Equations), NA & C (Numerical Analysis & Computation), Calculus, Solving of Advanced Mathematics and Engineering Problems/Numerical,Projects and Academic Report Writing and Students' Projects and Assignments. Softwares on which I have full command are Mathematica, MATLAB, MultiSim,Proteus and MultiSim, AutoCAD, Microsoft Office (Word, Excel, Powerpoint), Microsoft Project, Microsoft Visio.

    $12.00 /hr
    21 hours
  2. Konstantin P.

    Konstantin P.

    CAD/CAE engineer

    Russia - Last active: 1 day ago - Tests: 14 - Portfolio: 19

    Hello! I am hard-working, fast learner, responsible and accurate. I'm ready to provide you help using my skills as efficient as i can. I am capable of 3D modeling in CAD software, most familiar with SolidWorks. I have wide experience in solving problems of different nature (structural, thermal, electromagnetics) in FEA software, mostly in ANSYS; capable of writing macro on APDL. Working to get PhD in electrotechnologies I received wide experience in technical text translation, formatting text in office application and so on.

    $7.40 /hr
    17 hours
  3. Nikola Bugarcic

    Nikola Bugarcic

    Virtual Assistant

    Serbia - Last active: 13 days ago - Tests: 3

    Thank You for viewing my profile! I am a detailed worker with 3 years of experience - the last two years in a "virtual office" environment. I specialize in delivering quality services with respect for strict deadlines and high expectation. I have equipped with a dedicated home office complete with a computer, laptop and laser printer. I provide creative and detailed administrative, collecting, date entry and editing services. I posses the self discipline and time menagement skills necessary to have served as a virtual emloyee. I can bring a value to your business and help solve your issues. I have extensive experience in excel and word.

    $4.00 /hr
    53 hours
  4. Anwar A.

    Anwar A.

    Electronics Engineer/Article Writer/Admin Support/Assignment Expert

    Pakistan - Last active: 11/11/2014 - Tests: 2 - Portfolio: 6

    I am an Electronics Engineer. I have developed my skills,during my course of study,of programming in Matlab,C,PHP,AS3,HTML,Microwind,Verilog,Simulink,Labview,Latex,Pspice, Article Writing,Report Writing and Web Research.I have also good experience of working with Wordpress,Autoit(desktop applications)and Flash. I have also studied courses related to Technical writing,Communication skills,Project Management,Total Quality Management,Engineering Economy and Ethical and legal dimension.I believe that,having the required skills and knowledge,I can provide my best services to clients.

    $11.11 /hr
    64 hours
  5. Nikolay K.

    Nikolay K.

    Translation / Transcription

    Ukraine - Last active: 1 day ago - Tests: 19

    Hello! My name is Nikolay, I work as a research associate and hold a candidate of sciences' degree. I am experienced, reliable and professional English to Russian/Ukrainian (and vice versa) translator and data entry specialist. I am fluent in English, and have a native level of Russian and Ukrainian languages. If you want your text to be translated quickly, professionally, and in correct way, or if you want some internet research or data entry made accurately, feel free to contact me. I am skilled in Mathcad, office suites, Express Scribe, CAT-tools.

    Groups: oTranslators

    $4.00 /hr
    2,654 hours
  6. John lester S.

    John lester S.

    Senior Electronic Hardware Design Engineer

    Philippines - Last active: 1 day ago - Tests: 3 - Portfolio: 10

    More than 10 years of experience in circuit design and product development. Have long time experience in doing electrical and electronic schematics. Experienced in switching converter design such as flayback, boost, buck, forward, ITTF, LLC and others. Have experience in designing low to high power switch mode power supply from proto to mass production. Capable of doing detailed analysis such as worst case, design failure mode and effects analysis, monte carlo and reliability prediction to come up with a robust and high quality design. Have long experience in implementing customer requirements and designing circuit from scratch that best fit the specifications. Capable of leading people. Summary of Capabilities: 1. AC-DC power supply design, switching and linear, multiple outputs or single, trimmable or fixed 2. DC-DC power supply design 3. Offline AC-DC adapter design 4. Charger design with constant current and constant voltage, AC-DC 5. Charger design with constant current and constant voltage , DC-DC for Li-Ion, Li-Poly, LiFeP04, Lead acid and so on 6. LED lighting related applications 7. Solar panel energy harvesting and charging systems 8. Switching converters such as buck, boost, buck-boost, flyback, forward, LLC, half bridge etc 9. Amplifiers, filters, switch 10. MCU, DSP and digital circuits 11. Schematic and PCB using eagle 12. Simulations using LTSpice, Matlab, Simulink, Simetrix and Simplis 13. Design analysis and computations using Mathcad 14. Control system design, type 1,2,3 and PID using spice, SISO tool in Matlab or Simulink control design Projects: 1. 750 W AC-DC, efficiency 94% This is a three stage design consisting of power factor correction circuit (boost topology), buck pre-regualtor and main DC-DC (half bridge resonance). The supply has EMI filter on board and passed CE and FCC or ICES emission limits. This supply is compliant to line surge; can withstand 2.6kV and 1.3kV common mode and differential mode voltage spikes. It complies to ESD, EFT, ringwave, dips and interruptions and harmonics and of course conducted and radiated EMI. The design has an auxilliary circuit which is a flyback topology that provides power to the control and houskeeping circuits. The main controllers are digital signal controllers (DSC). Some features includes but not limited to: a) Current sharing, b) Startup short protection, c) Running Short Protection, d) Over voltage protection, e) Under voltage protection, f) Power limit, g) Higher power factor (close to unity), h) holdup of 20msec, i) over current protection, j) over temperature protection, k) output reporting, l) input reporting, m) higher accuracy 2. 500 W AC-DC, efficiency 92% Have the same features as above. This PSU is composed of two stage only; PFC and LLC resonant converter. 3. 360 W AC-DC, 90% efficiency, variable output This power supply has variable output voltage from 14.25V to 16.5V. Two stage design using PFC and LLC resonant converter. All the basic circuits in item number one are in place. All the international standards are also met. This power supply has a convection rating of 220W; meaning it can handle this power without a fan cooling. This is ideal for medical and other fanless applications. 4. 450 W AC-DC, 92% efficiency, multiple outputs This power supply has multiple outputs. It has 12V/21A, 5V/30A, 3.3V/10A and standby of 5V/4A. All the international standards are in place and has all the protections needed as item number 1 above. 5. 50W buck-boost design This is used for e-cigarrete. It can handle continuous 50W with variable output voltage of 1V to 10V. It is powered by a 3.7V rechargeable batttery. 6. AC-DC, 5W charger design with constant current and contant voltage 7. Charging circuit for solar panel applications 8. Lithium Ion Charger 32V input to 24V output with variable charge current 9. Energy saving standby circuit 10. Smart Junction boxes for automotive. This is the one controlling all the body electronics of an automobile. Such as headlights, foglights, wipers, mirrors, heated mirror, fans, etc.

    $30.00 /hr
    11 hours
  7. Bilal Shayb

    Bilal Shayb

    chemical engineer with renewable energy and water analysis experience

    Palestinian Territories - Last active: 2 days ago - Tests: 6 - Portfolio: 2

    I am a Chemical engineer with long term practical experience in Environmental Technology, pharmaceutical industry, plastic reforming technology, and scientific research , over the last 10 years I work on more than 25 research projects that related to biogas , biodiesel, solar energy , rural areas development, wind energy bio-plastic development,and energy future.

    $7.78 /hr
    37 hours
  8. Ana Petelj

    Ana Petelj

    MSc in Environmental Engineering

    Serbia - Last active: 1 day ago - Tests: 1

    Excellent command of English due to use of books and scientific papers in English for years, participation in international projects, working in foreign countries, etc. Excellent command of MS Office due to technical preparation of books, papers, presentations for lectures at university, conferences, workshops, etc; Excel for programming and statistical analysis. Highly analytical, precise, paying attention to details, research and innovative spirit, capable to understand complex texts. Familiar with different topics related to environmental issues.

    $7.00 /hr
    684 hours
  9. Muhammad Enam Ul Haq

    Muhammad Enam Ul Haq

    Mechanical Engineer,CAD/CAM,Design Engineer,Researcher,Writer,Lecturer

    Pakistan - Last active: 2 days ago - Tests: 3 - Portfolio: 5

    My basic aim is to provide CAD/CAM/Designing/Modeling/Analysis/Drawing services to the potential vendors resulting in knowledge & experience gain and, especially, deliver a high-quality work responsibly. I have vast knowledge of Fluid Mechanics, Heat Transfer, Applied Thermodynamics and Computational Fluid Dynamics. I am a self-motivated, highly qualified Mechanical Engineer. I have been designing and developing different types of machine tools and industrial equipments like pumps, vessels, valves and other industrial components. I offer innovative thinking for coming up with new types of special ideas. With my Math, Design and Development background and very high skills using Pro/E, Creo, Solid Works, AutoCAD and Autodesk Inventor, CATIA, I offer design skills not commonly found. I am capable of reverse engineer existing equipment for the purpose of improvement of the design. I have good working knowledge of machining processing. The key responsibilities include; 1. Modeling/Designing using Pro/E, Autodesk Inventor, Solid Works etc. 2. Developing Production drawings using Pro/E, Autodesk AutoCAD, Autodesk Inventor, Solid-works etc. 3. Simulations and analysis of prototypes using Pro/E, Ansys, MatLab, Autodesk Inventor, CF Design, Gambit.Fluent etc. 4. Structural & Thermal Analysis using Pro/E, Ansys etc I have done a lot of such projects i.e. 1. Design, Simulation and fabrication of power section of Positive Displacement Mud Motor (An oil & gas field drilling tool) 2. Reverse Engineering of Blower Pump, Rotary Piston Vacuum Pump etc. 3. Study & Fabrication of Electric Geyser. 4. Study & modeling of Temperature Distribution on tube sheet of shell & tube type heat exchangers. 5. Study of Hook's Law and simple harmonic motion in Working Model. 6. Modeling of different mechanical components as lab projects using Pro/E, Autodesk Inventor, and AutoCAD etc. 7. Motion, Feasibility, Structural, Heat etc. analysis using Pro/E, Ansys, MathCAD, MATLab, MSc NASTRAN, Autodesk Inventor, CF Design, Gambit.Fluent etc. Furthermore, I have been doing industrial experience for more than 05 years that is polishing my skills time by time giving my work more professional touch. I assure complete sincerity and honesty regarding my work.

    $16.67 /hr
    160 hours
  10. Raluca Sabou

    Raluca Sabou Agency Contractor

    Data Entry, Internet research, Designer, iOS dev

    Romania - Last active: 29 days ago - Tests: 5 - Portfolio: 68

    My objective is to complete the job as perfect as it is possible in due time. I am meticulous with the projects I have. I have 7 years experience in MsOffice, expecially Word and Excel, in Data Entry, designing using Photoshop and Illustrator and an iOS developer. Also I have knowledge of other programs like Mathcad, Autocad, Dialux. I am here to provide you good work in shortest time.

    Associated with: DesignR

    $7.78 /hr
    852 hours