Author: Abby

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2/3 of the class received an extra 10 minutes on an exam. Should I bring this up to the professor?

One of my graduate-level classes had our midterm exam that's worth 30% of our class grade. Since our class is too big for proper distancing in our usual room, the professor split the class....

October 26, 2021 2
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Building a toroidal transformer core

I found these stainless steel wires (in diameters 0.3mm to 3mm) being sold in affordable prices. My question is whether it's a good idea to wound a thin wire (0.3mm diam.) like the top-right...

October 26, 2021 2
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Write Boolean equations for Q and Q' of clocked SR latch

I am not an EE student but a CS student, so I may not have in depth knowledge regarding the specific of latches, flip flop. The answer to this question was: Q(next) = (RC + (Q'))' Q'(next)...

October 26, 2021 2
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Is it ok connect 60Hz inverter to 50Hz transformer?

I have an inverter (DC 12V to AC 240V). Inverter's frequency is 60Hz. I want to connect the output (240V) inverter to an transformer (AC 240V to AC 16V) which indicates input...

October 26, 2021 2
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Can comfort nursing become a problem?

I practice comfort nursing with my baby and at this point I wonder if it’s becoming his sleep association and possibly contributing to his unwillingness to fall asleep without the breast....

October 26, 2021 2
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Can APIC LVTERR on AMD be configured as NMI message type?

In fact, the message type / delivery mode of LVTERR on Intel is unconfigured. However, on AMD, it is presented as below. The problem is, when I configure the MT of LVTERR on AMD as NMI,...

October 26, 2021 2
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Can I share my peers' class visit reports with the hiring committee?

I am currently a TT faculty at school A and I am applying to school B. I have my peers' letters from their annual class visits at school A. Can I share them with the hiring committee while...

October 26, 2021 2
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Descriptive language to generate real code

This question may be silly but would still like to know a response. Is there some descriptive language through which one could define a functionality of a class or function and than generate...

October 26, 2021 2
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Why are there four RTGs in a row sitting in this room? What are they waiting for? Were they built together and stored for separate launches?

The extremely cool NASA JPL video Triumph at Saturn (Part I) is really worth a watch and/or listen. At about 17:40 it discusses Cassini's RTG and at 18:36 there is a shot of four...

October 26, 2021 2
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How exactly did Cassini provide rock-solid attitude control to enable high resolution low light imaging? (1.2 arcsec/pixel for narrow angle camera)

The extremely cool NASA JPL video Triumph at Saturn (Part I) is really worth a watch and/or listen. At about 45:45 it discusses the period after SOI (Saturn Orbit Insertion, July 1, 2004,...

October 26, 2021 2
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How can I get the pid of a subshell?

How can I get the pid of a subshell? For example: $ echo $$ 16808 This doesn't work, because the original shell expands $$: $ ( echo $$ ) 16808 Why does single quoting...

October 26, 2021 2
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"rev" command: I want to reverse only $string but it reverses everything before $string too

read -p "Input a sentence: " mystring string=("$mystring" | rev) echo "The sentence reversed character by character is: " $string I want to reverse only...

October 26, 2021 2
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Why does gnome-terminal lag when using brackets or parentheses?

Whenever there are many brackets drawn in the gnome-terminal window, things start to lag pretty badly. This effect is especially apparent, when the brackets don't have anything in between...

October 26, 2021 2
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Problem with apache2 server

So I am having a problem with my apache2 server sharing a file. I am on ParrotSec OS 4.11 debian. Anyhow, when I create a file alexa.exe and place it in /var/www/html directory and then...

October 26, 2021 2
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Discouraging reviewers from an entire research group

I have recently β€” and prematurely β€” interrupted a work relationship with a research institution, due to a series of professional/scientific disagreements. Considering that these disagreements...

October 26, 2021 2
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How to choose optocoupler

The circuit below will drive a 12v motor using an optocoupler. In the circuit PC817 is used but how do you know which optocoupler to use?

October 26, 2021 2
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In terms of costs of mass production: is it better to try to reduce resistances' tolerance or capacitors' tolerance?

So I am doing a small project of optimization of components tolerance to reduce the impact of circuit sensitivity to meet a project specification. Right now I am with 5% resistors and inductors...

October 26, 2021 2
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force output on a MAX3232 RS-232 transceiver

I need to probe the output RX (DOUT1/2) nets (connected to one MCU's UART) of a MAX3232 RS232 transceiver, for this I'll use the PCB test points, but I'd also like to "force" logic...

October 26, 2021 2
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Manchester and NRZ coding schemes

How does NRZ recover the clock? For example, Manchester coding is a self-time scheme, but we still need to have DLL or PLL for the recovery, it can be done without those CDR circuits? and...

October 26, 2021 2
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Why AC motor driver shorts out?

I have been working in a VFD using an AC motor driver FSSB30CH60DF and making control of it using a dspic30f4011. As you can see in the attached circuit schematic, the mains supply is a single...

October 26, 2021 2
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