Interpretation of negative values when using Dekati ELPI+?

Hi, I am currently using an Electrical Low Pressure Impactor (ELPI+) manufactured by Dekati. While using it to measure the number of particles, sometime, I encounter negative value for number of...

10 November 2017 827 0 View

Drag Loss in Aircraft?

What is the percentage of aircraft speed that is lost due to drag experienced by it? Does the drag loss vary with respect to the altitude and speed of aircraft? How do you calculate the loss of...

08 September 2015 1,849 1 View

How do I calculate the temperature rise during friction?

I would like to know if there is a way to calculate the temperature rise and hence the wear rate of two bodies in sliding contact theoretically? The data I have are contact pressure, sliding...

31 December 2014 6,398 6 View

Which software should be used for contact dynamic analysis?

11 December 2014 5,172 17 View

What is the Shear Modulus and specific heat of Molybdenum Disulphide?

What is the Shear Modulus and specific heat of MoS2? Also I would like to know other important mechanical properties of MoS2

11 December 2014 6,077 4 View

Young's Modulus of Molybdenum Disulphide (MoS2)?

08 September 2014 7,149 3 View

What are the dimensions of the Total Knee Replacement Implant?

I would like to know the Dimensions of a TKR Implant with both the femoral and the tibial part. Also reference for creating a TKR Implant on either ProE or Solidworks or Catia?

08 September 2014 7,023 4 View

What are the guidelines set by the FDA (Food and Drug Administration) for bio-compatibility of a metal?

I would like to know what are guidelines set by the FDA (USA) for the Bio-compatibility of a Metal that is in direct contact with the body (attached to the femoral bone)? Metal to be used is...

08 September 2014 9,603 1 View

Buffer Exchange using column packed with sephadex G-25 effect on protein concentration?

Hello, If i am doing a buffer exchange for an antibody of 1mg/mL, does the elution lose protein in the process of buffer exchange? For example, if i flow through 500 uL of 1mg/mL sample, and...

03 March 2021 6,299 3 View

No title

03 March 2021 5,360 2 View

Any research papers for extraction of nutrient deprivation on macroalgae? Analysed by HPLC-UV and GC/MS. Possibly from macroalgae genus Rhizoclonium?

I am doing my thesis on the nutrient deprivation on the macroalgae Rhizoclonium sp. I will be analysing the levels over a period of roughly 5 days by HPLC-UV and GC/MS. I will be using seawater as...

28 February 2021 6,477 1 View

Necessary tube lenght to cool Natural gas in a dry-ice cooling bath?

I have a tank which contains natural gas at 250 Bar and 293 Kelvin. I want to cool the gas in a dry-ice cooling bath to about 195 Kelvin. The gas will flow in a copper-tube through the bath with a...

27 February 2021 8,128 1 View

How can we raise the figure when we writing a paper with Latex ?

Hi, everyone. I'm a starter to write a paper by Latex. But I have some difficulty using it. I'm writing the paper with 2 columns. And, there is one figure that occupies the 2 both-sides. I want to...

26 February 2021 3,738 3 View

Exit velocity of natural gas from pressurized tank?

Hi Guys. I'm a mechanical engineer and have a bit trouble, would be very glad if you could help me with my questions. I have a pressurized tank which contains Natural Gas at 200 Bar and 293...

26 February 2021 6,253 3 View

Gas sensor response and recovery time independant of flow rate and chamber volume?

I am trying to obtain the response and recovery times for my gas sensor device. It appears the the response/recovery times are primarily dependant on the flow rate of the gas I inject into the...

26 February 2021 1,511 3 View

Why do a weight decrease for thermal degradation in nitrogen gas condition?

Hi all The question is related to TGA(Thermogravimetric analysis). Thermal degradation easily understood but why do samples weight decrease? altough just binding is broked, the weight of...

26 February 2021 1,100 5 View

What is the best way to calculate the angles of twist for concrete columns subjected to torsional moment using finite element software?

In Finite element software like ANSYS , there is difficulty in obtaining direct results of twisting of concrete members because SOLID65 which is the unique element designed to represent concrete...

26 February 2021 3,806 2 View

Compute for the total volume of concrete needed for the concrete pouring of the foundation including its column up to NGL only as shown in the plan?

Looking for the quantity of cement, sand, and gravel of footings and columns. Thank you!

25 February 2021 3,092 2 View