Would the presence of sodium carbonate interfere with the COD measurement?

The water sample contains organics and sodium carbonate. Sodium carbonate reacts with sulfuric acid (in the COD tube) in the following reaction: H2SO4(aq) + Na2CO3(s) = Na2SO4(aq) + H2O +...

28 August 2019 9,684 3 View

What research has been done on learning non-Markovian reward functions?

Recently, some work has been done planning and learning in Non-Markovian Decision Processes, that is, decision-making with temporally extended rewards. In these settings, a particular reward is...

06 April 2019 4,890 2 View

Is this contamination in cell culture?

In my human cell line, I've observed masses that look different from the cells. When seen with the naked eye, they appear to be white spots. When seen under a scope, they appear to be dense...

14 August 2018 8,480 4 View

What's the best way of comparing data from multiple uears of one population of Common Spadefoot toads?

Research on the population size of the common spadefoot in different parts of the Dutch province of Noord-Brabant. How can I compare if there's a significant difference between the population...

10 May 2018 577 3 View

Why are my THP-1 cells dying so fast?

Im working with THP-1. I culture them well, they grow well, they differenciate well. Then i infect them with 1:1 MOI and i treat them for 4 days with antibiotic. At they 4 almost all the cells...

01 February 2018 6,263 0 View

Estimating sample size: can secondary outcome data be used where primary outcome data does not exist?

I'm estimating sample size for a future study using the primary outcome (mean and SD) from a current study. The future study will use a randomized control design with two independent 'arms' (or...

17 January 2018 4,037 1 View

Can anyone spot any possible problems with this approach to diagnosing colorectal caner?

Take a sample from the suspected area, polyp, ulcer etc. Extract RNA from these cells. Convert to cDNA and do real time PCR to determine whether the oncogene VAV3 is over expressed? (VAV3 is...

25 October 2016 9,528 3 View

What is the definition of the POMDP state value function when the reward function is defined as R:S x A x S->Reals?

When the reward function is defined as R(a,s), the value function is defined as max_{a in A} (rho(a,b) + ...), where A is the set of actions, b is the current belief state and rho(a,b) is the...

05 May 2016 9,561 3 View

Why am I getting a low ICC even though agreement is objectively high?

31 January 2016 4,730 3 View

How can I derive the order of a LTI system?

16 January 2016 4,836 3 View

error in running a model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

error in modelling model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

MGL tools

20 June 2021 0 0 View

i have some problem with chtMultiRegionSimpleFoam

--> FOAM FATAL ERROR: Maximum number of iterations exceeded From function Foam::scalar Foam::species::thermo::T(Foam::scalar, Foam::scalar, Foam::scalar, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar) const) const [with Thermo = Foam::hConstThermo >; Type = Foam::sensibleEnthalpy; Foam::scalar = double; Foam::species::thermo = Foam::species::thermo >, Foam::sensibleEnthalpy>] in file /home/ubuntu/OpenFOAM/OpenFOAM-4.1/src/thermophysicalModels/specie/lnInclude/thermoI.H at line 66. FOAM aborting #0 Foam::error::printStack(Foam::Ostream&) at ??:? #1 Foam::error::abort() at ??:? #2 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::calculate() at ??:? #3 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::correct() at ??:? #4 ? at ??:? #5 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6" #6 ? at ??:?

24 March 2021 0 0 View

Could you recommend any books about Number Theory?

Beginner level books. High level books. Analytical Number Theory. Algebraic Number Theory. Combinatorical Number Theory. Books about partitions. Books about primes.

03 March 2021 7,174 5 View

Resistor definition in Piezoelectric bimorph with ANSYS workbench

Hello, good day! I am trying to simulate similar bimorph piezoelectric harvester with below commands. However, the output power doesn't change with resistor value. Please help to find the reason. ET,10,CIRCU94,0 !SET UP RESISTOR R,1,100000 !RESISTANCE VALUE TYPE,10 !SET ELEMENT TYPE E,1,2 !CREATE RESISTOR BETWEEN NODES 1 AND 2 Thanks in advance Regards,

02 March 2021 0 0 View

Arena simulation - how do i model the following model in ARENA (see description) (new to ARENA)?

Hello, I'm fairly new to ARENA and I have the following problem: I have two queues in which, in each queue, a different order type arrives (both having an arrival rate of exponential 10). Order...

02 March 2021 2,431 3 View

No title

02 March 2021 3,060 3 View

How to repeat an operation on an atom selection for multiple times in PyMol?

Hi, I am trying to construct a multi-layer fibril structure from a single layer in PyMol by translating the layer along the fibril axis. For now, I am able to use the Translate command in PyMol...

02 March 2021 4,569 4 View

How does Scientist/RG community evaluates a case study article and the impact of it on a researcher career?

An article that is published as a case study in the SJR listed journal. How much value is added to a researcher career? How it is evaluated by a scientific researcher/University admission...

02 March 2021 9,661 3 View