|
Re: large alignment error with polemaster & mach2
Jim Hawn
Hi Robert,
I think that is right. As a rule of thumb, I too find that one arc minute or less is adequate for producing decent subs using PHD2 all other things equal.
|
|
|
|
locked
Re: [ap-ug] To mask or not to mask, that is the question
Richard Crisp
If I go in public I wear mask and gloves
toggle quoted messageShow quoted text
“Corrected” by my iPhone
On Aug 1, 2020, at 5:01 PM, chris1011@aol.com wrote:
|
|
|
|
Re: Moving to a new imaging laptop
#APCC
Yes, we will see how well it works. ;-) I want to carry over as many of the settings from the old machine to the new machine as possible. Then I can go in and reconfigure machine specific settings - like the COM port setting - manually on the new machine. Now I just need the new machine.
-- Dean Jacobsen http://astrophoto.net/wp/ Image Gallery - http://astrophoto.net/wp/image-gallery/ Astrobin - https://www.astrobin.com/users/deanjacobsen/
|
|
|
|
Re: To mask or not to mask, that is the question
DFisch
And here I thought Rowland was going to talk about putting a mask on his 10 inch Mak to make it a 4 “ in order to be fair to all the other telescope makers
On Sat, Aug 1, 2020 at 21:57 Robert Sinitiere <bobstar9@...> wrote:
--
TJF MOBILE
|
|
|
|
locked
Re: [ap-ug] To mask or not to mask, that is the question
thefamily90 Phillips
As a physician, I have not missed a day at work since this virus stuff began. I have been there with almost nothing to do for days on end but I still have gone in. Things are getting back to normal in terms of patient volume and
biopsies, etc. I just hope we move forward and not backward.
Get Outlook for iOS
From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of thefamily90 Phillips <thefamily90@...>
Sent: Sunday, August 2, 2020 9:08:43 AM To: main@ap-gto.groups.io <main@ap-gto.groups.io>; rdcrisp@... <rdcrisp@...>; main@ap-ug.groups.io <main@ap-ug.groups.io>; robert-wynne@... <robert-wynne@...> Subject: Re: [ap-gto] [ap-ug] To mask or not to mask, that is the question I wear a mask when out in public or when dealing with patients in the Dermatopathology office down the hall. As a dermatopathologist I read skin margins for excision of cancers while the patient is in the office. I have to have contact
with the physician and often go into the dermatology office during the procedure. I wear a mask then. I don’t really know whether it is doing anyone any good or not, but I know if I don’t wear one I will make others nervous and there is no need to do that.
Get
Outlook for iOS
From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of uncarollo2 <chris1011@...> via groups.io <chris1011@...>
Sent: Saturday, August 1, 2020 8:01:27 PM To: rdcrisp@... <rdcrisp@...>; main@ap-ug.groups.io <main@ap-ug.groups.io>; robert-wynne@... <robert-wynne@...>; main@ap-gto.groups.io <main@ap-gto.groups.io> Subject: Re: [ap-gto] [ap-ug] To mask or not to mask, that is the question It takes a while to get used to it. Just like it took a year to begin wearing seatbelts back in 1960. But now it's automatic. I don't even think about seatbelts, they just seem to attach themselves.
Rolando
 -----Original Message-----
From: Richard Crisp <rdcrisp@...> To: main@ap-ug.groups.io; robert-wynne@...; main@ap-gto.groups.io Sent: Sat, Aug 1, 2020 6:11 pm Subject: Re: [ap-ug] To mask or not to mask, that is the question I figure there are three scenarios of interest re: masks
I figure 1 is about like expecting chicken wire to keep mosquitoes out
#2 is reasonable and a kind thing to do for your fellow man (this is S.O.P. in Japan for decades btw) and #3 is a dead on BULLSEYE for me
It’s a constant battle for me to try to remember to keep my hands away from my face/eyes.
Not sure about you, but it’s hard for me to break habits that are going on their 7th decade!
From: main@ap-ug.groups.io <main@ap-ug.groups.io>
On Behalf Of Roland Christen via groups.io
Sent: Saturday, August 1, 2020 3:31 PM To: robert-wynne@...; main@ap-ug.groups.io; chris1011@...; main@ap-gto.groups.io Subject: Re: [ap-ug] To mask or not to mask, that is the question Yes, maybe a fine point.
I wear one not for my own protection because breathing in doesn't prevent my getting a lung full of critters. My mask is for the protection of other
people so that my phlegm and snot doesn't spray into the air when i sneeze or cough.
Our company was shot down for 2 months because of governor's orders, but now we are all working again. None of our crew has caught the virus, all of
us wear our masks here at work when we have to interact or are within 10 ft of each other. Our small operation cannot survive if we get sick, so the mask is a small inconvenience.
Just heard the governor may shut our state down again because of a surge of rising cases. Hope not because right now we are going gang busters and want
to produce and ship product. Our competitors overseas have no restrictions now and are eager to put US companies out of business. Is that enough reason to don a mask in public? I hope so.
Rolando
-----Original Message-----
From: ROBERT WYNNE <robert-wynne@...> To: main@ap-ug.groups.io; Roland Christen via groups.io <chris1011@...>; main@ap-gto.groups.io <main@ap-gto.groups.io> Sent: Sat, Aug 1, 2020 5:15 pm Subject: Re: [ap-ug] To mask or not to mask, that is the question Maybe this is putting too fine a point on topic without any humor; but from
N95
masks are designed to remove more than 95% of all particles that are at least 0.3 microns (µm) in diameter. In fact, measurements of the particle filtration efficiency of N95 masks show that they are capable of filtering ≈99.8% of particles with a diameter
of ≈0.1 μm (Rengasamy
et al., 2017). SARS-CoV-2 is an enveloped virus ≈0.1 μm in diameter, so N95 masks are capable of filtering most free virions, but they do more than that. How so? Viruses are often transmitted through respiratory droplets produced by coughing and sneezing.
Respiratory droplets are usually divided into two size bins, large droplets (>5 μm in diameter) that fall rapidly to the ground and are thus transmitted only over short distances, and small droplets (≤5 μm in diameter). Small droplets can evaporate into 'droplet
nuclei', remain suspended in air for significant periods of time and could be inhaled. Some viruses, such as measles, can be transmitted by droplet nuclei (Tellier
et al., 2019). Larger droplets are also known to transmit viruses, usually by settling onto surfaces that are touched and transported by hands onto mucosal membranes such as the eyes, nose and mouth (CDC,
2020). The characteristic diameter of large droplets produced by sneezing is ~100 μm (Han
et al., 2013), while the diameter of droplet nuclei produced by coughing is on the order of ~1 μm (Yang
et al., 2007). At present, it is unclear whether surfaces or air are the dominant mode of SARS-CoV-2 transmission, but N95 masks should provide some protection against both (Jefferson
et al., 2009; Leung
et al., 2020).
|
|
|
|
locked
Re: [ap-ug] To mask or not to mask, that is the question
thefamily90 Phillips
I wear a mask when out in public or when dealing with patients in the Dermatopathology office down the hall. As a dermatopathologist I read skin margins for excision of cancers while the patient is in the office. I have to have
contact with the physician and often go into the dermatology office during the procedure. I wear a mask then. I don’t really know whether it is doing anyone any good or not, but I know if I don’t wear one I will make others nervous and there is no need to
do that.
Get Outlook for iOS
From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of uncarollo2 <chris1011@...> via groups.io <chris1011@...>
Sent: Saturday, August 1, 2020 8:01:27 PM To: rdcrisp@... <rdcrisp@...>; main@ap-ug.groups.io <main@ap-ug.groups.io>; robert-wynne@... <robert-wynne@...>; main@ap-gto.groups.io <main@ap-gto.groups.io> Subject: Re: [ap-gto] [ap-ug] To mask or not to mask, that is the question It takes a while to get used to it. Just like it took a year to begin wearing seatbelts back in 1960. But now it's automatic. I don't even think about seatbelts, they just seem to attach themselves.
Rolando
-----Original Message-----
From: Richard Crisp <rdcrisp@...> To: main@ap-ug.groups.io; robert-wynne@...; main@ap-gto.groups.io Sent: Sat, Aug 1, 2020 6:11 pm Subject: Re: [ap-ug] To mask or not to mask, that is the question I figure there are three scenarios of interest re: masks
I figure 1 is about like expecting chicken wire to keep mosquitoes out
#2 is reasonable and a kind thing to do for your fellow man (this is S.O.P. in Japan for decades btw) and #3 is a dead on BULLSEYE for me
It’s a constant battle for me to try to remember to keep my hands away from my face/eyes.
Not sure about you, but it’s hard for me to break habits that are going on their 7th decade!
From: main@ap-ug.groups.io <main@ap-ug.groups.io>
On Behalf Of Roland Christen via groups.io
Sent: Saturday, August 1, 2020 3:31 PM To: robert-wynne@...; main@ap-ug.groups.io; chris1011@...; main@ap-gto.groups.io Subject: Re: [ap-ug] To mask or not to mask, that is the question Yes, maybe a fine point.
I wear one not for my own protection because breathing in doesn't prevent my getting a lung full of critters. My mask is for the protection of other people
so that my phlegm and snot doesn't spray into the air when i sneeze or cough.
Our company was shot down for 2 months because of governor's orders, but now we are all working again. None of our crew has caught the virus, all of us
wear our masks here at work when we have to interact or are within 10 ft of each other. Our small operation cannot survive if we get sick, so the mask is a small inconvenience.
Just heard the governor may shut our state down again because of a surge of rising cases. Hope not because right now we are going gang busters and want
to produce and ship product. Our competitors overseas have no restrictions now and are eager to put US companies out of business. Is that enough reason to don a mask in public? I hope so.
Rolando
-----Original Message-----
From: ROBERT WYNNE <robert-wynne@...> To: main@ap-ug.groups.io; Roland Christen via groups.io <chris1011@...>; main@ap-gto.groups.io <main@ap-gto.groups.io> Sent: Sat, Aug 1, 2020 5:15 pm Subject: Re: [ap-ug] To mask or not to mask, that is the question Maybe this is putting too fine a point on topic without any humor; but from
N95
masks are designed to remove more than 95% of all particles that are at least 0.3 microns (µm) in diameter. In fact, measurements of the particle filtration efficiency of N95 masks show that they are capable of filtering ≈99.8% of particles with a diameter
of ≈0.1 μm (Rengasamy
et al., 2017). SARS-CoV-2 is an enveloped virus ≈0.1 μm in diameter, so N95 masks are capable of filtering most free virions, but they do more than that. How so? Viruses are often transmitted through respiratory droplets produced by coughing and sneezing.
Respiratory droplets are usually divided into two size bins, large droplets (>5 μm in diameter) that fall rapidly to the ground and are thus transmitted only over short distances, and small droplets (≤5 μm in diameter). Small droplets can evaporate into 'droplet
nuclei', remain suspended in air for significant periods of time and could be inhaled. Some viruses, such as measles, can be transmitted by droplet nuclei (Tellier
et al., 2019). Larger droplets are also known to transmit viruses, usually by settling onto surfaces that are touched and transported by hands onto mucosal membranes such as the eyes, nose and mouth (CDC,
2020). The characteristic diameter of large droplets produced by sneezing is ~100 μm (Han
et al., 2013), while the diameter of droplet nuclei produced by coughing is on the order of ~1 μm (Yang
et al., 2007). At present, it is unclear whether surfaces or air are the dominant mode of SARS-CoV-2 transmission, but N95 masks should provide some protection against both (Jefferson
et al., 2009; Leung
et al., 2020).
|
|
|
|
Re: Pelican Nebula and M33
Robert Chozick
I enjoyed the discussion. I actually took the second version I did for this and combined it 25% with the first one and like it better.
toggle quoted messageShow quoted text
I like the control and manipulation in Photoshop. I just combined 2 versions in a few seconds. I prefer painting to pixel math. Robert
On Aug 1, 2020, at 10:11 PM, Stuart <stuart.j.heggie@...> wrote: Robert, you are right, we did talk about this before - I forgot - apologies! I appreciate the detailed description of your workflow. I tend to start in PI and move to PS only at the end. I've not had enough (any?) experience with Nebulosity to know what it does but I've heard lots of good things about it. For sure this is art more than science. Especially when it comes to "pretty pictures". I was very curious if you found the OSC camera made it easier or harder to achieve a pleasing balance. Either way, the steps you describe give you the control you need to produce the image you're looking for. I think both were very pleasing. Just curious about the colour balance using a OSC. Stuart Heggie
-- Stuart http://www.astrofoto.ca/stuartheggie/ Robert Chozick
|
|
|
|
Re: large alignment error with polemaster & mach2
Robert Chozick
What degree of polar alignment do most find workable? I find that Polemaster gets me from 30 arc seconds to one arc minute polar alignment. Shouldn’t 1 arc minute be sufficient for guiding in most cases?
toggle quoted messageShow quoted text
Robert
Here is some more information:
Note, this covers only the RA drift rate. Dec drift will also always be there no matter how you polar align.
Rolando
-----Original Message-----
To: main@ap-gto.groups.io <main@ap-gto.groups.io> Sent: Sat, Aug 1, 2020 5:51 pm Subject: Re: [ap-gto] large alignment error with polemaster & mach2 The RA tracking rate can vary anywhere from 35 to 70 arc seconds per hour (0.6 to 1.5 arc sec per minute) between the zenith and +- 3 hours from the zenith. The rate of drift is not linear. Modeling creates a drift curve for each point in the sky over the modeled track. The link below can tell you the actual tracking rate for different points in the sky:
These are approximate and depend on perfect polar alignment and not scope flex. In reality the drift can be worse if everything is not perfect. The calculations cover only the atmospheric refraction at nominal temperature and pressure.
Rolando
-----Original Message-----
From: Andrea Lucchetti <andlucchett@...> To: main@ap-gto.groups.io Sent: Sat, Aug 1, 2020 5:35 pm Subject: Re: [ap-gto] large alignment error with polemaster & mach2 Hi Roland,
I always thought the refraction effect depends on latitude, but can be taken into account using the refracted pole. do you think the effect is so big at my latitude? I leave and image at 42 deg north. Or do you mean refraction due to altitude over the horizon? In both cases, I don't understand why I need a model, unless you mean a model with different atmospheric parameters (i.e pressure and temp). If these are not adjusted night after night , the refraction effect should be a "factor" not requiring modeling. It should be just calculated. Am I missing something? Thank you again, Andrea Robert Chozick
|
|
|
|
Re: Pelican Nebula and M33
Stuart <stuart.j.heggie@...>
Robert, you are right, we did talk about this before - I forgot - apologies! I appreciate the detailed description of your workflow. I tend to start in PI and move to PS only at the end. I've not had enough (any?) experience with Nebulosity to know what it does but I've heard lots of good things about it. For sure this is art more than science. Especially when it comes to "pretty pictures". I was very curious if you found the OSC camera made it easier or harder to achieve a pleasing balance. Either way, the steps you describe give you the control you need to produce the image you're looking for. I think both were very pleasing. Just curious about the colour balance using a OSC. Stuart Heggie
--
Stuart http://www.astrofoto.ca/stuartheggie/
|
|
|
|
Re: Pelican Nebula and M33
Robert Chozick
Thanks Stuart. I think we have had this discussion before. I do use Photometric Color Calibration in PI. I pre process in Nebulosity (I am a Mac user) then I go to PI and use SCNR to remove green, Photometric Color Calibration and DBE. Then I go back to Nebulosity to use its Digital Development for its final stretch to a 16 bit Tiff for Photoshop. Then I finish the rest of the way in Photoshop. I have attached what M33 looked like when it went to Photoshop:
toggle quoted messageShow quoted text
I did a quick processing in Photoshop without the galaxy color change described below. I just took a bit of green out. When I do galaxies I use Curves in Photoshop to bring up the red in the core and blue in the arms. These are slight adjustments at specific points with the opposite color being reduced where the other is increased. I manually play to create which part of the galaxy becomes core and which part starts the arms. I know this is not kosher to many but I am not trying for exact reproduction. I think of it as art more than science. In the end I am not trying to get the exact colors just what looks nice to me. I do think I overdid it the effect on this one. Again the version I posted tonight I did M33 a while ago without doing the color correction. This one was LRGB plus a good amount of Ha. I intend to get a lot more subs of M33 and also adding Ha. The one I posted tonight was really only meant to be a test of the new camera. Robert
On Aug 1, 2020, at 8:09 PM, Stuart <stuart.j.heggie@...> wrote: Robert, both of these shots are really nice! I have been going back and forth on them and wonder about the constraints that OSC cameras put on you for colour. How do you calibrate them for colour? I shoot monochrome with filters and use PixInsight's PhotometricColorCalibration tool which is simply amazing. I mention this because the M33 shot seems like it could stand a tweak on colour but not an arbitrary one to "make it look like everyone else's". You mention that you use PixInsight. Have you tried that calibration tool? Stuart Heggie
-- Stuart http://www.astrofoto.ca/stuartheggie/ Robert Chozick
|
|
|
|
Re: To mask or not to mask, that is the question
Robert Sinitiere
Funny but good video.....So, wear your Masks, for astronauts and non astronuts!
toggle quoted messageShow quoted text
Be Safe everyone at Astro-Physics, and everyone else out there. I was a unit based pharmacist and infusion pharmacist for 43 years. I’m 70 now, and I’m sure masks played some part in my survival, for N95 PPE’s on the units, and self preservation PPE’s compounding some fairly toxic chemotherapy agents. Let’s all survive to see 2021!! CLEAR SKIES!!
On Aug 1, 2020, at 4:38 PM, uncarollo2 <chris1011@...> via groups.io <chris1011@...> wrote:
|
|
|
|
Re: Pelican Nebula and M33
DFisch
On Sat, Aug 1, 2020 at 21:09 Stuart <stuart.j.heggie@...> wrote:
TJF MOBILE
|
|
|
|
Re: Pelican Nebula and M33
Stuart <stuart.j.heggie@...>
Robert, both of these shots are really nice! I have been going back and forth on them and wonder about the constraints that OSC cameras put on you for colour. How do you calibrate them for colour? I shoot monochrome with filters and use PixInsight's PhotometricColorCalibration tool which is simply amazing. I mention this because the M33 shot seems like it could stand a tweak on colour but not an arbitrary one to "make it look like everyone else's". You mention that you use PixInsight. Have you tried that calibration tool? Stuart Heggie
--
Stuart http://www.astrofoto.ca/stuartheggie/
|
|
|
|
locked
Re: [ap-ug] To mask or not to mask, that is the question
Pete Lardizabal
I’ve had a recent exposure to a COVID-19 positive member I supervise and thankfully none of us in my Unit have come down with this virus. Our Sheriffs Office has had over 200 members infected in the past few months. Wear a mask 😷 when interacting with others. The primary value is minimizing transmission to others. N95 masks are less common and provide some protection in receiving the virus from others. Common masks do a good job of preventing transmitting the virus. A 52 year old VERY fit colleague (prior to being infected) of mine has been in ICU for 4 weeks now. Other members of his Unit have recovered but Chris has a long road in front of him for recovery. Be Safe out there my friends! 🤗 Pete
On Aug 1, 2020, at 8:01 PM, Roland Christen via groups.io <chris1011@...> wrote:
|
|
|
|
locked
Re: [ap-ug] To mask or not to mask, that is the question
Richard Crisp
I figure there are three scenarios of interest re: masks
I figure 1 is about like expecting chicken wire to keep mosquitoes out #2 is reasonable and a kind thing to do for your fellow man (this is S.O.P. in Japan for decades btw) and #3 is a dead on BULLSEYE for me
It’s a constant battle for me to try to remember to keep my hands away from my face/eyes.
Not sure about you, but it’s hard for me to break habits that are going on their 7th decade!
From: main@ap-ug.groups.io <main@ap-ug.groups.io> On Behalf Of Roland Christen via groups.io
Sent: Saturday, August 1, 2020 3:31 PM To: robert-wynne@...; main@ap-ug.groups.io; chris1011@...; main@ap-gto.groups.io Subject: Re: [ap-ug] To mask or not to mask, that is the question
Yes, maybe a fine point. I wear one not for my own protection because breathing in doesn't prevent my getting a lung full of critters. My mask is for the protection of other people so that my phlegm and snot doesn't spray into the air when i sneeze or cough.
Our company was shot down for 2 months because of governor's orders, but now we are all working again. None of our crew has caught the virus, all of us wear our masks here at work when we have to interact or are within 10 ft of each other. Our small operation cannot survive if we get sick, so the mask is a small inconvenience.
Just heard the governor may shut our state down again because of a surge of rising cases. Hope not because right now we are going gang busters and want to produce and ship product. Our competitors overseas have no restrictions now and are eager to put US companies out of business. Is that enough reason to don a mask in public? I hope so.
Rolando
-----Original Message----- Maybe this is putting too fine a point on topic without any humor; but from N95 masks are designed to remove more than 95% of all particles that are at least 0.3 microns (µm) in diameter. In fact, measurements of the particle filtration efficiency of N95 masks show that they are capable of filtering ≈99.8% of particles with a diameter of ≈0.1 μm (Rengasamy et al., 2017). SARS-CoV-2 is an enveloped virus ≈0.1 μm in diameter, so N95 masks are capable of filtering most free virions, but they do more than that. How so? Viruses are often transmitted through respiratory droplets produced by coughing and sneezing. Respiratory droplets are usually divided into two size bins, large droplets (>5 μm in diameter) that fall rapidly to the ground and are thus transmitted only over short distances, and small droplets (≤5 μm in diameter). Small droplets can evaporate into 'droplet nuclei', remain suspended in air for significant periods of time and could be inhaled. Some viruses, such as measles, can be transmitted by droplet nuclei (Tellier et al., 2019). Larger droplets are also known to transmit viruses, usually by settling onto surfaces that are touched and transported by hands onto mucosal membranes such as the eyes, nose and mouth (CDC, 2020). The characteristic diameter of large droplets produced by sneezing is ~100 μm (Han et al., 2013), while the diameter of droplet nuclei produced by coughing is on the order of ~1 μm (Yang et al., 2007). At present, it is unclear whether surfaces or air are the dominant mode of SARS-CoV-2 transmission, but N95 masks should provide some protection against both (Jefferson et al., 2009; Leung et al., 2020).
|
|
|
|
Re: OFF TOPIC: Duplication of Group messages - tagged as “[Edited Message Follows]”
I'm guilty as charged.
Before groups.io
If a saw an big error or link was not clickable.
I would to delete and resend a corrected message.
I normally compose message in notepad++, copy, paste and send.
If a link was not clickable, I have found adding a return at end
of link will make it clickable and then I delete the next blank line.
That would make the message seem unchanged.
I don't want members to have to select, copy and paste to go to a link. If it was an un-clickable link edit, you may not see a difference.
After switching to groups.io
I don't have to delete message but can edit an existing message.
I don't desire to resend message to group but only 2 choices.
It's either "Resend to Group" or ''Discard''.
I would like another button "Save work and exit without resending to group"
My edits are for those that search for old messages and I want mine as correct
as I can get them with all links clickable.
In groups.io if you click on the ''Edited on date'' it will display a list of revisions.
You check-mark any 2 and click compare button to see what was changed.
November 2019 was a message I sent on Orthogonality and
I did indeed edit that one many times maybe 10 times
Each message is different if only 1 word (no links to correct in that message).
As I re-read message or members comment,
I would edit to make message hopefully easier too understand.
Jimmy
33.6N, 88.6W
I've got nothing to do and all day to do it I'm retired!
|
|
|
|
Re: To mask or not to mask, that is the question
Roland Christen
-----Original Message-----
From: jimmyjujames <jimmy_an@...> To: main@ap-gto.groups.io Sent: Sat, Aug 1, 2020 6:33 pm Subject: Re: [ap-gto] To mask or not to mask, that is the question Thank you for the mask link.
Funny and makes a point.
I sent it to 19 family and friends.
Took a screen shot of hit count and 30 minutes later it had increased 9,000 hits.
It's going viral on the virus.
Thanks
Jimmy
Think Again!
|
|
|
|
locked
Re: [ap-ug] To mask or not to mask, that is the question
Roland Christen
It takes a while to get used to it. Just like it took a year to begin wearing seatbelts back in 1960. But now it's automatic. I don't even think about seatbelts, they just seem to attach themselves.
Rolando
-----Original Message-----
From: Richard Crisp <rdcrisp@...> To: main@ap-ug.groups.io; robert-wynne@...; main@ap-gto.groups.io Sent: Sat, Aug 1, 2020 6:11 pm Subject: Re: [ap-ug] To mask or not to mask, that is the question I figure there are three scenarios of interest re: masks
I figure 1 is about like expecting chicken wire to keep mosquitoes out
#2 is reasonable and a kind thing to do for your fellow man (this is S.O.P. in Japan for decades btw) and #3 is a dead on BULLSEYE for me
It’s a constant battle for me to try to remember to keep my hands away from my face/eyes.
Not sure about you, but it’s hard for me to break habits that are going on their 7th decade!
From: main@ap-ug.groups.io <main@ap-ug.groups.io> On Behalf Of Roland Christen via groups.io
Sent: Saturday, August 1, 2020 3:31 PM To: robert-wynne@...; main@ap-ug.groups.io; chris1011@...; main@ap-gto.groups.io Subject: Re: [ap-ug] To mask or not to mask, that is the question Yes, maybe a fine point.
I wear one not for my own protection because breathing in doesn't prevent my getting a lung full of critters. My mask is for the protection of other people so that my phlegm and snot doesn't spray into the air when i sneeze or cough.
Our company was shot down for 2 months because of governor's orders, but now we are all working again. None of our crew has caught the virus, all of us wear our masks here at work when we have to interact or are within 10 ft of each other. Our small operation cannot survive if we get sick, so the mask is a small inconvenience.
Just heard the governor may shut our state down again because of a surge of rising cases. Hope not because right now we are going gang busters and want to produce and ship product. Our competitors overseas have no restrictions now and are eager to put US companies out of business. Is that enough reason to don a mask in public? I hope so.
Rolando
-----Original Message-----
From: ROBERT WYNNE <robert-wynne@...> To: main@ap-ug.groups.io; Roland Christen via groups.io <chris1011@...>; main@ap-gto.groups.io <main@ap-gto.groups.io> Sent: Sat, Aug 1, 2020 5:15 pm Subject: Re: [ap-ug] To mask or not to mask, that is the question Maybe this is putting too fine a point on topic without any humor; but from
N95 masks are designed to remove more than 95% of all particles that are at least 0.3 microns (µm) in diameter. In fact, measurements of the particle filtration efficiency of N95 masks show that they are capable of filtering ≈99.8% of particles with a diameter of ≈0.1 μm (Rengasamy et al., 2017). SARS-CoV-2 is an enveloped virus ≈0.1 μm in diameter, so N95 masks are capable of filtering most free virions, but they do more than that. How so? Viruses are often transmitted through respiratory droplets produced by coughing and sneezing. Respiratory droplets are usually divided into two size bins, large droplets (>5 μm in diameter) that fall rapidly to the ground and are thus transmitted only over short distances, and small droplets (≤5 μm in diameter). Small droplets can evaporate into 'droplet nuclei', remain suspended in air for significant periods of time and could be inhaled. Some viruses, such as measles, can be transmitted by droplet nuclei (Tellier et al., 2019). Larger droplets are also known to transmit viruses, usually by settling onto surfaces that are touched and transported by hands onto mucosal membranes such as the eyes, nose and mouth (CDC, 2020). The characteristic diameter of large droplets produced by sneezing is ~100 μm (Han et al., 2013), while the diameter of droplet nuclei produced by coughing is on the order of ~1 μm (Yang et al., 2007). At present, it is unclear whether surfaces or air are the dominant mode of SARS-CoV-2 transmission, but N95 masks should provide some protection against both (Jefferson et al., 2009; Leung et al., 2020).
|
|
|
|
Re: To mask or not to mask, that is the question
Thank you for the mask link.
Funny and makes a point.
I sent it to 19 family and friends.
Took a screen shot of hit count and 30 minutes later it had increased 9,000 hits.
It's going viral on the virus.
Thanks
Jimmy
Think Again!
|
|
|
|
Re: Moving to a new imaging laptop
#APCC
I'm about to do the same thing, so I'm watching this thread
carefully.
toggle quoted messageShow quoted text
Mojo
On 8/1/20 10:28 AM, Dean Jacobsen
wrote:
I am moving to a new imaging laptop in a couple of days and will be installing APCC Pro, ASCOM 6.4 and the AP ASCOM driver on it.
|
|
|
