Mistakes:

Fatih Aşçı:
  Toughness: 
Amount of energy per unit volume, which a material can absorb before fracturing. Its unit is J per cubic meter and  

Are you sure that's your own words? Because ı saw the same description on the wikipedia.

Ahmet şahin 

Catia:CATIA (Computer Aided Three-Dimensional Interactive Application) is a professional CAD / CAM based software. Catia program; is a computer software that makes both design and analysis of all products for industrial purposes extremely fast, easy and reliable. This program is widely used because it can meet the needs of the automotive sector and aircraft production in general.

Catia is not a concept of mechanical engineering. It's a kind of cad programs. We can say it's a tool for engineering but catia is not a concept

skills list updated with explanation - AMR EBID

1- 3d printing 
it is a printer that prints the drown model in 3d with plastic material. to print probably you need to know swt the printer with good sottin so you will get a good output like infill and the speed.

2 -solidwork 
it is a drowing program used widely in mechanical engineering factory to drow the prototype. it is one of the mani skills should every mechanical engineers have an idea about it 

3 -ansys 
it is an analysis program used to analysis the load and deflection and other perspective of  the design 

4 -matlap
it is a programing program for mathmatical calualtion it can used espessily with inverse kinamitcs

5 -time study
it is an important skill which is analysis the time required to produce or manufacture a peace, it has many using in manufacturing line and developing 

6- lathe mechanism

7- degree of freedoms

8- steering system

9- feedback control systems

10-design process

Mistakes Under Mechanical Engineering Concepts

İbrahim Burkay TUĞLUCA

110410022

(1)  Biomechanics- Süleyman Çiçek

Does not seems to be your own explanation.

 https://www.verywellfit.com/understanding-biomechanics-3498389

(2) All Concepts - Veli İsmail Avan

Not proper to say misake, however, the explanations should be longer than one sentence, at least "one paragraph each" means longer than one sentence.

(3) Radiation - Furkan Çetinalp

Probably you wanted to explain radiation in heat transfer, if you explained it everything could be better, but the radiation you explained here I guess has nothing to do with mech. eng.

(4) All Concepts/ Good English Knowledge - Rıdvan Büyükçapar

All concepts, same problem with Veli İsmail, good english knowledge does not seems to be mech. eng. concept. May be you can say skill but not concepts fyi. 

(5) Stress-Strain Graph - Hacı Ali Kerse

Definition is wrong. FYI

(6) Amr

Guess you forget explain some of your concepts, like half of them. 

Tnx.

Mistakes Identification Homework; SYED FAIZ ALI (110410169)

Mistakes Identification

https://me403prototyping.blogspot.com/b/post-preview?token=APq4FmBz23qHw-ozNO5eiJI6fRicVfjR-ppzLINNRLoxRDA6lw59YFvPAoM0qCsS_bokSb16ba-qb3bUOP_yQ-Pb84i2YZG4I3hEq89Xgs4phac-crVNV-d3WtD3IgY5MYWUWI2uy72Z&postId=8905489933354008757&type=POST

AMR EBID (october/7/2018)

3D printing: The writer defines the 3D printing as a machine which is able to 3D print the drown plastic object.

1) The problem is that the word 'drown' institutes the method or process which includes water. 

2) 3D printers print the object whereas 3D printing process of printing something in 3D.

3) 3D printing is not only of plastic materials, and there are resin 3D printers, metallic 3D printers, and even 3D printers that can 3D print the cells from bio-ink. Basically, 3D printing is a practice in Additive Manufacturing. The term "3D printing is not defined properly".

4)Ansys: the writer has defined "ANSYS" software as an analysis software. Though the definition is not wrong, yet it is also not complete and proper at the same time. ANSYS uses finite element analysis based on meshing to analyze the different physics environments and their collective or segregative impact on the object. 

5) Also, the writer has specified that it is used for analyzing load deflection and other perspectives of design', but remains absent in defining the perspectives of design. Rather in actual, the FEA modeling is done of multiphysics provided by the user.

6) Time study: The writer has defined the concept of time study, to a very extent, wrong. Time study is a feature offered by FEA software to incorporate in the cases where physics defined are time-dependent. (This has been already pointed out by Ismail Avan, I just explained it in detail)

7) The writer has also defined a time study a skill. Might it be possible that he wanted to define time-management instead of time study?

8) The writer has only explained 5 concepts, not all of them. As a homework, we were supposed to give 10 explanations.

9) Other than this, the writer has made plenty of spelling mistakes such as MATLAB is spelled as matlap.

The link is given above.

2  mistakes

the concept "energy" is used by both
 Mehmet Taşdemir  and  YUNUS CULFA (posted it first)

the concept "fatigue" is used by both 
 İbrahim Burkay Tuğluca and  Mehmet Taşdemir (posted it first)

2 Mistakes

Hina Najam

1- Solar System by Furkan Çentinalp is not a mechanical engineering concept
2- Risk Management by Mehmet Polat is not a mechanical engineering concept

2 Mistakes

1- Fatih Aşçı and Kaan Karaömer both have 'Density' as an engineering concept.

2- Veli İsmail and Serhat Kaya both have 'Bernouli Equation' as an engineering concept.

2 Mistakes

- Amr Ebid 

Time study

Not a mechanical engineering concept. 

- Muammer Kılçık

Satellite 

Not a mechanical engineering concept. 

                                       Definitions of the Concepts

1.  Vector projection of 'Fab' onto 'Fac':    
It is a vector whose magnitude is the scalar projection of Fab on Fac with the same direction as Fac. 
(Fab)ac = Fab * Uac where Fab is the vector Fab and Uac is the unit vector of Fac, and Uac= Fac / (Length of Fac)
  
2.  Toughness: 
Amount of energy per unit volume, which a material can absorb before fracturing. Its unit is J per cubic meter and  

3.  Specific gravity: 

It is the ratio of the density of a substance to the density of a well-known substance. Here well-known substance is usually chosen as H2O at a specified temperature. 

Specific Gravity: SG= P of substance /P of H2O

4.  Density: 

It is the ratio of mass to the volume for a substance. Density: p = m/V

5.  Elastic limit: It is the point on the stress-strain curve beyond which the material is permanently deformed after load is removed. When stress is applied till the elastic limit, and released, the material should come back to its first size and shape.

6.  Ultimate strength: 

It is the maximum stress that a material can endure without any alongation.

7.  Proportional limit: It is the highest stress where the stress is proportional to the strain. In other words, the maximum stress limit where the slope of the stress strain curve is still constant.

8.  Yield strength: It is the point where the material exceeds the elastic limit and can not return to original shape even if the stress is removed.

9.  First-angle projection: In the first-angle projection, the object is imagined to be in the first quadrant, and it lies between the observer and the projection plane. This is commonly used in most of the world except the United States.

10.Third-angle projection:  In the third-angle projection, the object is imagined to be in the third quadrant, and projection plane lies between the observer and the object. When views are drawn, the right side view is placed on the right side of the front view, and the top view is placed above the front view. This is used in the United States.

Explaniton of Mechanical Engineering Concepts (Ali Karaca)

1-) Gear Box: Gearbox is set of gear and it usually use with engine. it adjust the engine rpm and torque. 

2-) Belt: Belt is a flexible material that used to link rotating shafts it basically transmit rpm and it has variety usage like engine or 3D printers.

3-) Pulley: A simple device which has cylindrical shape and it can be used with rope or chain to lift or drag load. Simply heavy loads can be lift with smaller force with pulley system.

4-)  Suspension: Suspension is a system of spring and shock absorber that supports the body of the vehicle and it can be eitner used in wheeled or trackedvehicle. it basically absorb shocks transmitted from the wheels.

5-)Spring: Spring is an elastic object and it stores mechanical energy under force when the force realese it moves its initial position. Springs can be made veriaty materials.

6-) Differential: Differential is a sytem of gears and it basically allows two shaft rotate in diffirent speeds which is important when a vehicle turns bend because outer wheel and inner wheel should be different rpm in order to take bend safely in high speeds.

7-) Tire: Tire is ring shaped component that surrounds the rim and it gives vehicle traction and it also aborbs shock since they are made of rubber.

8-) Hydraulic Lift: Hydraulic lift is a device that uses liquid pressure in a piston to lift or move objects.

9-) Steering System: Steering sytem is responsible for turning the vehicle of the tire. it basically transmit steering wheel response to the tire and it transfer cylindrical movement to linear movement.

10-) Linear rail: a linear motion bearing is a bearing designed to provide free motion in one direction. it usually uses at heavy movement and precision machine.