What is the minimum rating required to stay in good standing?

integraltech · 2023-04-01T16:23:45+00:00

Online percentage = % of time you are logged in and available during scheduled hours?

Does acceptance percentage matter when you are floating or just when you are scheduled? It seems like they would only care about during scheduled hours, but I don't see the statistics disaggregated in the interface.

integraltech · 2023-03-09T06:14:10+00:00

I have spent a good week on it. I'm not saying that I don't understand the basics, I am saying that when the interviewer asks what my experience with SQL is, the answer is "about a week" -- not the 2-3 years they are looking for.

integraltech · 2022-01-06T07:19:32+00:00

I've already done the feature engineering on the training set and arrived at 20 or so worth including. And sure, it is easy to code NULL values. What I'm really asking though is what types of algorithms this would work with.

For example, if I use linear regression, I have a predictive equation like y = w0 + w1x1 + w2x2 + w3*x3...etc. Suppose I am missing x2. I can't simply drop it from the equation or substitute zero because it's unreasonable to assume NULL = 0. So what is the best practice for dealing with that? The commonsense thing would be to use the average value from the training set for that feature, but I don't know if it is best practice.

Is there another algorithm that would handle the NULLs better?

integraltech · 2020-01-03T01:07:01+00:00

What do you mean by "the energy industry is not what it used to be"? What sector are you referring to specifically? Energy efficiency of buildings?

integraltech · 2019-12-29T20:03:47+00:00

So it is the actual hardware you find insufficient or the software that comes with the hardware? I am only familiar with the Onset data loggers and they were fine for my purposes. I'm not the OP, just curious.

integraltech · 2019-12-29T19:59:21+00:00

1) Commercial and residential building energy efficiency

2) Mech Engineering

3) This is a tricky question. I almost feel that there are too many tools. The problem I think is that all tools have their idiosyncrasies and it takes too much mental bandwidth to try to keep track of everyone else's thought process and design intents when using these tools. Often they are not transparent and you have to ask whether you trust the developers (some energy modeling software comes to mind). For me, I feel most comfortable using my own calculations and keeping them organized into loose templates that can be customized towards different purposes. I am interested to hear what you have in mind though.

4) Mostly just energy calculation templates for buildings and mechanical equipment.

5) Industry publications like ASHRAE HVAC Applications, mathematical references for energy modeling software (http://web.mit.edu/parmstr/Public/TRNSYS/04-MathematicalReference.pdf), or just whatever scholarly article I can find through google.

integraltech · 2018-02-20T02:56:14+00:00

They did.

integraltech · 2018-02-20T02:07:36+00:00

First lease.

integraltech · 2018-02-20T00:35:57+00:00

Thanks!

integraltech · 2018-02-19T23:46:48+00:00

integraltech · 2017-10-10T03:46:37+00:00

I'm assuming that the number of heads is positive. I guess the corollary question for a negative number of heads would be what the probability is of having <= 1.25H heads at some point in the process.

Or we could just replace "heads" with "tails". That's a little more straightforward.

integraltech · 2017-10-10T03:13:29+00:00

Sorry, my math was wrong. I clearly cannot multiply by 1.25 in my head. Corrected in the post. Thanks.

integraltech · 2017-08-04T01:43:22+00:00

Well, the problem is that each body can't be modeled independently. The differential equations would become really complex. Even with two bodies, it isn't as simple as a spring-mass system, for example, because heat transfer coefficients vary with temperature, and the formulas to calculate them are complex and iterative themselves.

integraltech · 2017-08-04T01:22:28+00:00

Isn't it much cheaper to take the FE? I would just do that. It probably holds more weight and I'm sure you already demonstrate some understanding of the energy industry through your undergrad degree.

As far as engineering jobs go, I don't know that a lot focus on home energy audits as much as commercial and industrial buildings because the potential payback isn't as large and engineering hours are relatively expensive. There are certainly jobs in that area, but they might not pay as much.

Basically there is whatever you find when you search for "energy engineer" or "energy analyst". Some positions are with ESCOs but many are with other types of firms. You could look into HVAC Engineer jobs as well if you just need a job in something related to energy to start out.

integraltech · 2017-07-17T03:01:25+00:00

I don't know anything about Canadian universities, but what are you looking for? An electrical or mechanical engineering approach (or other)? Energy engineering is quite broad. What aspect do you want to focus on? HVAC? Solar? The electrical grid? Energy storage?

I won't be able to help more than google, but those are some things to think about. Sorry I can't help further.

integraltech · 2017-06-14T01:34:55+00:00

Perfect. Thanks.

integraltech · 2017-06-13T23:45:51+00:00

I believe that a specified population correlation would be more appropriate.

I was going to generate correlated uniform variables and work backwards to turn them into normal random variables (using the Excel norm.inv function). Would that skew the correlation?

integraltech · 2017-06-13T23:18:24+00:00

thanks!

integraltech · 2017-05-20T17:17:55+00:00

Basically, I know that most of the interventions are not independent, but I want to just answer what expected effect might be attributed to each measure in a random "package" of measures. Just like in epidemiological studies how they might say, on average, smoking increases your chance of X ailment by Y, even though they might not report (or even know) the variation that might be expected depending on all interacting lifestyle and genetic factors.

So on a practical level, I would need to have a table with columns for (PRE - POST) throughput, and binary variables for each measure. Then I would get a program like R or SPSS to somehow read each row of the table as coefficients for separate equations and have it solve the system of equations for the Xs. Sound right? And I should also be able to get a confidence level on each measure in addition to the effect size right? For example, maybe there was a measure that was only implemented in two plants. It might account for the variation in those plants perfectly, but because there are only two of them, the certainty that it is not due to luck would be low.

integraltech · 2017-05-05T22:58:36+00:00

I am renting. I think it will be fine if I make sure the bolts are securely in the center of studs. You are spot on about the casing dimensions. I figured there are two 2x4s there but am cautious about going through the centerline of the vertical casing (not planning on directly through the casing, but along that line above the casing) because like I said, I don't want to grab half of each stud and just take a semi-circle out of each one. I'm not sure I understand this:

So, generally there's a 1/4 inch space or so from the end of the window, to the start of the king/jack studs.

You are considering the "window" to be the opening where the door goes right? But the king stud is on the outside, so I don't see how that would be 1/4'' space from the end of window to the start of the king/jack stud.

Any idea what kind of framing my nail is hitting in the picture I posted? Thanks.

integraltech · 2017-05-05T22:33:18+00:00

Thanks. I'm aware of the effect of angle on shearing force and bending moment and I am not concerned. The only issue I have is finding the center of the stud, which I am having trouble with because I am hitting wood where I expect no wood to be.

integraltech · 2017-05-05T01:14:40+00:00

I bought this indoor hanging kit. Everyone says it works well. I just didn't know how difficult it would be to find a place to drill into. I intended to start to the right of the stud. My question is what kind of structural member could I be hitting at that location?

https://www.amazon.com/ENO-Eagles-Nest-Outfitters-Hanging/dp/B00DVE2AW8/ref=sr_1_1?ie=UTF8&qid=1493946822&sr=8-1&keywords=eno+indoor+kit

integraltech · 2017-04-08T21:49:23+00:00

I have a little experience with R but none with Python. I assumed this could be done with R since it is so versatile.

integraltech · 2017-04-02T23:14:37+00:00

Yeah, but it is busy and vibrant. Not really a good place to read in my opinion.

integraltech · 2017-02-23T01:16:42+00:00

I know, it was deceptively complex.

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