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11 February 2020 3,076 10 View

How to get the 1 Rotation Vector and 1 Translation vector from 5 images using Opencv-python?

I am calibrating my camera and took 5 images on it. I used OpenCV for the calibration and i end up having 1 Set of Camera Intrinsic Matrix , 5 Rvecs and 5 Tvecs . I would like to know how to solve...

13 March 2019 1,483 1 View

How to estimate mass flow rate (mass balancing) on a vertical opening (window) of a room having both inflow and back flow?

how to estimate mass flow rate (mass balancing) of air on a vertical opening (window) of a room having both inflow and back flow? There is no equipment (fan etc.) used for transfer the air. The...

31 July 2018 3,969 1 View

How to do a Z-test in STATISTICA software?

Hello, everyone. Someone knows how can I do a Comparing Two Proportions Z-test in STATISTICA software? It's the first time that I'm woring on this software and I really don't know if i can obtain...

01 February 2018 3,846 0 View

Can TNF ALPHA inhibit 18s genes?

27 June 2016 5,972 2 View

How accurate is to evaluate T-regulatory cells in a tumor infiltrate only by immunohistochemistry of foxp3+ cells?

19 June 2016 1,732 3 View

How do I deal with quality constraints in a simulation-optimization run in Matlab?

I'm working in a simulation-optimization problem, for which I'm using Matlab. The simulation consists in solving a set of ODE's, which in turn gives information to calculate an objective function...

24 June 2015 5,587 1 View

How do I deal with quality constraints in a simulation-optimization run in Matlab?

I'm working in a simulation-optimization problem, for which I'm using Matlab. The simulation consists in solving a set of ODE's, which in turn gives information to calculate an objective function...

05 June 2015 4,883 1 View

Does somebody have a good experience by teaching some programming course by using a pseudolanguage like Karel or Logo?

One hypothesis is that by doing that, students can learn programming faster...

04 May 2014 1,520 1 View

How does one visualize the amino acids involved in docked proteins?

I have docked two proteins using Patchdock tool and firedock. How will I point out those amino acids which are involved in binding of the two proteins, using which software?

15 June 2013 800 12 View

Waters 2707 HPLC autosampler problem?

I am using a 2707 waters HPLC device. When I try to inject a sample, it says missing plate or rack. I changed the needle and calibrated its position but I still get the same problem. I even get...

02 March 2021 1,408 1 View

How optimize the Size Exclusion Chromatography?

Hello! I'll do a size exclusion chromatography, but I only have an open column, and I'll perform the peptide extraction from yeast, using buffer lysis (sodium phosphate 50 mM/NaCl 30 mM/DNAse and...

01 March 2021 2,215 2 View

Precipitate after adding laemmli buffer to protein solution containing Potassium Acetate?

Hi, I am running a size exclusion chromatography experiment with a buffer containing Potassium Acetate as a salt. I analyse these fractions through SDS-PAGE. After boiling my SEC fractions in...

01 March 2021 2,622 3 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

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

Why do the air flow results vary totally when adding scalar in CFD ?

Dear All, We are using Autodesk cfd to calculate the air flow in a single sided naturally ventilated room, where air flow depends only on buoyancy due to temperature difference between inside and...

25 February 2021 9,602 4 View

How to model Supercritical water gasification (SCWG) process in Homer software?

Hi everyone How to model Supercritical water gasification (SCWG) process in Homer software?

25 February 2021 4,075 1 View