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<font face="Arial">Thanks, should have caught that .. too late at
night !<br>
<br>
So from 27 to 40 C, your results for the Z axis are in the same
ballpark as the JJ runs, approximately -10nT per degree C. One of
my RM3100s shows the same relative magnitude but opposite sign on
the Z axis. And I'm also seeing a sign change depending upon the
axis.<br>
<br>
Jules K2KGJ<br>
<br>
</font>
<div class="moz-cite-prefix">On 8/4/2020 1:20 AM,
<a class="moz-txt-link-abbreviated" href="mailto:tangerinesdr-request@lists.tapr.org">tangerinesdr-request@lists.tapr.org</a> wrote:<br>
</div>
<blockquote type="cite"
cite="mid:mailman.3276.1596518429.14912.tangerinesdr_lists.tapr.org@lists.tapr.org">
<pre class="moz-quote-pre" wrap="">Send TangerineSDR mailing list submissions to
<a class="moz-txt-link-abbreviated" href="mailto:tangerinesdr@lists.tapr.org">tangerinesdr@lists.tapr.org</a>
To subscribe or unsubscribe via the World Wide Web, visit
<a class="moz-txt-link-freetext" href="http://lists.tapr.org/mailman/listinfo/tangerinesdr_lists.tapr.org">http://lists.tapr.org/mailman/listinfo/tangerinesdr_lists.tapr.org</a>
or, via email, send a message with subject or body 'help' to
<a class="moz-txt-link-abbreviated" href="mailto:tangerinesdr-request@lists.tapr.org">tangerinesdr-request@lists.tapr.org</a>
You can reach the person managing the list at
<a class="moz-txt-link-abbreviated" href="mailto:tangerinesdr-owner@lists.tapr.org">tangerinesdr-owner@lists.tapr.org</a>
When replying, please edit your Subject line so it is more specific
than "Re: Contents of TangerineSDR digest..."
Today's Topics:
1. Weekly Thursday 10 AM Telecon on Low-Cost PSWS System
(Kristina Collins)
2. Re: TangerineSDR Digest, Vol 17, Issue 5---re: N1HAC temp
test (David G. McGaw)
----------------------------------------------------------------------
Message: 1
Date: Tue, 4 Aug 2020 00:54:00 -0400
From: Kristina Collins <a class="moz-txt-link-rfc2396E" href="mailto:kvc2@case.edu"><kvc2@case.edu></a>
To: TAPR TangerineSDR Modular Software Defined Radio
<a class="moz-txt-link-rfc2396E" href="mailto:tangerinesdr@lists.tapr.org"><tangerinesdr@lists.tapr.org></a>
Subject: [TangerineSDR] Weekly Thursday 10 AM Telecon on Low-Cost PSWS
System
Message-ID:
<a class="moz-txt-link-rfc2396E" href="mailto:CAEeerr4JWVA4p25=nDUun83Ap+twSoqsbS8w6DEJzC2vm_xuvw@mail.gmail.com"><CAEeerr4JWVA4p25=nDUun83Ap+twSoqsbS8w6DEJzC2vm_xuvw@mail.gmail.com></a>
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Hi all,
I'd like to make you aware of our weekly telecon discussing the Standard
Station Receiver/Low Cost Personal Space Weather Station - colloquially,
the Grape. We meet on Thursdays at 10 am EDT to discuss the system
development and related topics. As we're articulating our software
requirements, we'd like to get some feedback from the Tangerine team to
ensure the systems work well together. All are welcome to join. Please
email me if you'd like to be added to the mailing list for weekly telecon
reminders.
Zoom link:
<a class="moz-txt-link-freetext" href="https://cwru.zoom.us/j/93592820870?pwd=SXhjU0ZDeGNmcTlEc0pSSTltNGs0UT09">https://cwru.zoom.us/j/93592820870?pwd=SXhjU0ZDeGNmcTlEc0pSSTltNGs0UT09</a>
(Password: 734778)
YouTube playlist of meetings to date:
<a class="moz-txt-link-freetext" href="https://www.youtube.com/playlist?list=PLTvFnCylkeSDkcVfj_qjAhQXar2LYrIP5">https://www.youtube.com/playlist?list=PLTvFnCylkeSDkcVfj_qjAhQXar2LYrIP5</a>
Hope to see you there!
73 de KD8OXT,
-KC
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------------------------------
Message: 2
Date: Tue, 4 Aug 2020 01:19:34 -0400
From: "David G. McGaw" <a class="moz-txt-link-rfc2396E" href="mailto:david.g.mcgaw@dartmouth.edu"><david.g.mcgaw@dartmouth.edu></a>
To: <a class="moz-txt-link-abbreviated" href="mailto:tangerinesdr@lists.tapr.org">tangerinesdr@lists.tapr.org</a>
Subject: Re: [TangerineSDR] TangerineSDR Digest, Vol 17, Issue 5---re:
N1HAC temp test
Message-ID: <a class="moz-txt-link-rfc2396E" href="mailto:cb24a50b-eca0-3f7f-74ad-ef1e316492ae@dartmouth.edu"><cb24a50b-eca0-3f7f-74ad-ef1e316492ae@dartmouth.edu></a>
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No, not Rz, just Z from runMag.? Started the temperature high above 85C,
ended at 27C.
The space between T and Z has been suppressed in your copy below. The
first line is 27C, 50.9uT, the last line is 85C, 48.6uT.
David N1HAC
On 8/3/20 11:34 PM, Julius Madey via TangerineSDR wrote:
</pre>
<blockquote type="cite">
<pre class="moz-quote-pre" wrap="">Dave, is 'raw data' the rz column from the latest runMag?? I assume
you started the test at 85C and ended around perhaps 25C or close to
that ??????
For Z axis on one of my two RM3100's I'm seeing around -10nT/degreeC
Thanks,
Jules K2KGJ
On 8/3/2020 10:51 PM, <a class="moz-txt-link-abbreviated" href="mailto:tangerinesdr-request@lists.tapr.org">tangerinesdr-request@lists.tapr.org</a> wrote:
</pre>
<blockquote type="cite">
<pre class="moz-quote-pre" wrap="">Send TangerineSDR mailing list submissions to
<a class="moz-txt-link-abbreviated" href="mailto:tangerinesdr@lists.tapr.org">tangerinesdr@lists.tapr.org</a>
To subscribe or unsubscribe via the World Wide Web, visit
<a class="moz-txt-link-freetext" href="http://lists.tapr.org/mailman/listinfo/tangerinesdr_lists.tapr.org">http://lists.tapr.org/mailman/listinfo/tangerinesdr_lists.tapr.org</a>
or, via email, send a message with subject or body 'help' to
<a class="moz-txt-link-abbreviated" href="mailto:tangerinesdr-request@lists.tapr.org">tangerinesdr-request@lists.tapr.org</a>
You can reach the person managing the list at
<a class="moz-txt-link-abbreviated" href="mailto:tangerinesdr-owner@lists.tapr.org">tangerinesdr-owner@lists.tapr.org</a>
When replying, please edit your Subject line so it is more specific
than "Re: Contents of TangerineSDR digest..."
Today's Topics:
1. Notes from PSWS / TangerineSDR call of 08-02-2020 (Tom McDermott)
2. Re: Mag update? (David G. McGaw)
----------------------------------------------------------------------
Message: 1
Date: Mon, 3 Aug 2020 19:12:11 -0700
From: Tom McDermott<a class="moz-txt-link-rfc2396E" href="mailto:tom.n5eg@gmail.com"><tom.n5eg@gmail.com></a>
To: TAPR TangerineSDR Modular Software Defined Radio
<a class="moz-txt-link-rfc2396E" href="mailto:tangerinesdr@lists.tapr.org"><tangerinesdr@lists.tapr.org></a>
Subject: [TangerineSDR] Notes from PSWS / TangerineSDR call of
08-02-2020
Message-ID:
<a class="moz-txt-link-rfc2396E" href="mailto:CACO3nRRbYte9MYE4UQBsej7puLR-qQtSddFH9j8D6wY1Zoku+g@mail.gmail.com"><CACO3nRRbYte9MYE4UQBsej7puLR-qQtSddFH9j8D6wY1Zoku+g@mail.gmail.com></a>
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Notes from PSWS / TangerineSDR call of 08-02-2020
1. Still an open question about correlation of the Tangerine magnetometer
data with the instruments at Jenny Jump. Other measurements seem like the
Tangerine unit is basically working, so there are plans to re-try the
measurements at Jenny Jump but at a location closer to the existing science
grade fluxgate magnetometer. Given the very few working copies of Dave's
hand-built units, it's difficult to separate a possible problem with one
unit from a general problem. We agreed to make 10 prototype sets (20
extender boards + 10 PNI boards) using Scotty's artwork so we can have more
units in order to verify proper operation.
-- Tom, N5EG
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------------------------------
Message: 2
Date: Mon, 3 Aug 2020 22:50:25 -0400
From: "David G. McGaw"<a class="moz-txt-link-rfc2396E" href="mailto:david.g.mcgaw@dartmouth.edu"><david.g.mcgaw@dartmouth.edu></a>
<a class="moz-txt-link-abbreviated" href="mailto:To:tangerinesdr@lists.tapr.org">To:tangerinesdr@lists.tapr.org</a>
Subject: Re: [TangerineSDR] Mag update?
Message-ID:<a class="moz-txt-link-rfc2396E" href="mailto:8aadd47f-fc94-e011-fec3-dfb049fe2b41@dartmouth.edu"><8aadd47f-fc94-e011-fec3-dfb049fe2b41@dartmouth.edu></a>
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I did a quick and rough test of the magnetometer change vs temperature.?
Here is my raw data.? I was measuring the Z-axis which here in NH is
about 50 uT while changing the temperature, as measured by the T
sensor.? I heated the unit up above 85C and then put it under a
cardboard cover to slow down the cooling and equilibrate the
temperature.? Here is my raw data:
T??????? Z-axis
2750.9 uT
3050.85
3550.77
4050.7
4550.7
5050.5
5550.4
6050.1
6549.9
7049.6
7549.2
8548.6
Noise was about .10 uT peak-peak.
David N1HAC
On 8/3/20 12:15 PM, Dr. Nathaniel A. Frissell Ph.D. via TangerineSDR wrote:
</pre>
<blockquote type="cite">
<pre class="moz-quote-pre" wrap="">This all sounds very good. I?m eager to see the results.
73 de Nathaniel W2NAF
*From:* TangerineSDR<a class="moz-txt-link-rfc2396E" href="mailto:tangerinesdr-bounces@lists.tapr.org"><tangerinesdr-bounces@lists.tapr.org></a> *On Behalf
Of *Julius Madey via TangerineSDR
*Sent:* Monday, August 3, 2020 11:57 AM
*To:* Kim, Hyomin<a class="moz-txt-link-rfc2396E" href="mailto:hmkim@njit.edu"><hmkim@njit.edu></a>; TAPR TangerineSDR Modular Software
Defined Radio<a class="moz-txt-link-rfc2396E" href="mailto:tangerinesdr@lists.tapr.org"><tangerinesdr@lists.tapr.org></a>
*Cc:* Julius Madey<a class="moz-txt-link-rfc2396E" href="mailto:hillfox@fairpoint.net"><hillfox@fairpoint.net></a>
*Subject:* Re: [TangerineSDR] TangerineSDR Digest, Vol 16, Issue
32_RM3100temperature effects
Great ! Out of direct sunlight and close to ground level would be best.
On 8/3/2020 11:28 AM, Kim, Hyomin wrote:
This time, I will try to place the sensor as close as possible to
the science magnetometer at Jenny Jump and insulate it to minimize
the temperature effect if any.
Gil (the site manager) and I will not be available until next week
but will try to address this issue as soon as possible.
Hyomin
NJIT logo
<a class="moz-txt-link-rfc2396E" href="https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.njit.edu%2F&data=02%7C01%7CDavid.G.McGaw%40dartmouth.edu%7C3b6a91608e414c3e359408d837c88c7e%7C995b093648d640e5a31ebf689ec9446f%7C0%7C0%7C637320681789745357&sdata=ucpyw%2FCCoLnq8YpSxPDMvU6K9r7Kgz7CaZbXeNqFNk0%3D&reserved=0"><https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.njit.edu%2F&data=02%7C01%7CDavid.G.McGaw%40dartmouth.edu%7C3b6a91608e414c3e359408d837c88c7e%7C995b093648d640e5a31ebf689ec9446f%7C0%7C0%7C637320681789745357&sdata=ucpyw%2FCCoLnq8YpSxPDMvU6K9r7Kgz7CaZbXeNqFNk0%3D&reserved=0></a>
*Hyomin Kim*
Assistant Professor
Physics
Center for Solar-Terrestrial Research
Institute for Space Weather Sciences
<a class="moz-txt-link-abbreviated" href="mailto:hmkim@njit.edu">hmkim@njit.edu</a> <a class="moz-txt-link-rfc2396E" href="mailto:hmkim@njit.edu"><mailto:hmkim@njit.edu></a>???(973)?596-5704
<a class="moz-txt-link-freetext" href="https://web.njit.edu/~hmkim/">https://web.njit.edu/~hmkim/</a>
<a class="moz-txt-link-rfc2396E" href="https://nam12.safelinks.protection.outlook.com/?url=https:%2F%2Fweb.njit.edu%2F~hmkim%2F&data=02%7C01%7CDavid.G.McGaw%40dartmouth.edu%7C3b6a91608e414c3e359408d837c88c7e%7C995b093648d640e5a31ebf689ec9446f%7C0%7C0%7C637320681789745357&sdata=BHNGmalVicIaozYaLs8qrpyLbAZVxSgPteuU4DFCMP4%3D&reserved=0"><https://nam12.safelinks.protection.outlook.com/?url=https:%2F%2Fweb.njit.edu%2F~hmkim%2F&data=02%7C01%7CDavid.G.McGaw%40dartmouth.edu%7C3b6a91608e414c3e359408d837c88c7e%7C995b093648d640e5a31ebf689ec9446f%7C0%7C0%7C637320681789745357&sdata=BHNGmalVicIaozYaLs8qrpyLbAZVxSgPteuU4DFCMP4%3D&reserved=0></a>
104 Tiernan Hall, 161 Warren Street, Newark, NJ 07102
On Sun, Aug 2, 2020 at 1:49 PM Julius Madey via TangerineSDR
<<a class="moz-txt-link-abbreviated" href="mailto:tangerinesdr@lists.tapr.org">tangerinesdr@lists.tapr.org</a> <a class="moz-txt-link-rfc2396E" href="mailto:tangerinesdr@lists.tapr.org"><mailto:tangerinesdr@lists.tapr.org></a>>
wrote:
That is the claim.? So either that's not the case, or perhaps
it holds for levels in excess of a few hundred nT or something
else is causing the variations that were observed at Jenny
Jump and in my various tests.? It is probably not B fields
very local to the adapter board, which sees currents in the
10mA range.? Just did some tests with 100mA into a twisted
pair of #31 magnet wire held near different parts of the
RM3100 board.
If the twisted pair was 0.5cm or more away from anything on
the board, no effect observed.? If it lay directly on one of
the sensing inductors, effect was ~ 50nT.
Another thought on temperature stability .... place the mag in
an in-ground vault.? Back in the 60's when we needed xtal
oscillator stability on the cheap and better than the usual
xtal oven of the day, we put the oscillator assembly about 3
feet underground.? Very stable short term and excellent long
term.? It would certainly work for 24 hour observation periods.
Jules Madey-K2KGJ
On 7/31/2020 1:38 PM,<a class="moz-txt-link-abbreviated" href="mailto:tangerinesdr-request@lists.tapr.org">tangerinesdr-request@lists.tapr.org</a>
<a class="moz-txt-link-rfc2396E" href="mailto:tangerinesdr-request@lists.tapr.org"><mailto:tangerinesdr-request@lists.tapr.org></a> wrote:
Send TangerineSDR mailing list submissions to
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or, via email, send a message with subject or body 'help' to
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When replying, please edit your Subject line so it is more specific
than "Re: Contents of TangerineSDR digest..."
Today's Topics:
?? 1. Re: Mag update? (David G. McGaw)
?? 2. Re: Mag update? (David G. McGaw)
----------------------------------------------------------------------
Message: 1
Date: Fri, 31 Jul 2020 13:36:38 -0400
From: "David G. McGaw"<a class="moz-txt-link-rfc2396E" href="mailto:david.g.mcgaw@dartmouth.edu"><david.g.mcgaw@dartmouth.edu></a> <a class="moz-txt-link-rfc2396E" href="mailto:david.g.mcgaw@dartmouth.edu"><mailto:david.g.mcgaw@dartmouth.edu></a>
<a class="moz-txt-link-abbreviated" href="mailto:To:tangerinesdr@lists.tapr.org">To:tangerinesdr@lists.tapr.org</a> <a class="moz-txt-link-rfc2396E" href="mailto:tangerinesdr@lists.tapr.org"><mailto:tangerinesdr@lists.tapr.org></a>
Subject: Re: [TangerineSDR] Mag update?
Message-ID:<a class="moz-txt-link-rfc2396E" href="mailto:3718db2a-97b4-eba5-8f0a-e94ead711cd7@dartmouth.edu"><3718db2a-97b4-eba5-8f0a-e94ead711cd7@dartmouth.edu></a> <a class="moz-txt-link-rfc2396E" href="mailto:3718db2a-97b4-eba5-8f0a-e94ead711cd7@dartmouth.edu"><mailto:3718db2a-97b4-eba5-8f0a-e94ead711cd7@dartmouth.edu></a>
Content-Type: text/plain; charset="utf-8"; Format="flowed"
Interesting, this, as it says on the RM3100 webpage "Measurements are
stable over temperature and inherently free of offset drift" and a
temperature coefficient is not even mentioned in the specs.
David N1HAC
On 7/31/20 11:18 AM, Julius Madey via TangerineSDR wrote:
Good morning all.? Betty Zhang at PNI is responding to the request and
has asked for more information which I have supplied, including some
of the JJ test comparisons, how I ran the calibration runs I did, data
reduction, etc.
I would suggest one further item for consideration in getting to a
useable solution.? If RM3100 temperature turns out to be a concern,
place the sensor in a small foam insulated box with a proportionally
controlled heater which maintains the temperature at something just
above what would be considered the highest environmental temperature
around the sensor.? That should be relatively simple to do without
introducing an interfering magnetic field local to the sensor.? Some
power would be required but with careful design, I would think well
within 1 watt.
Another possibility would be using peltier effect heat pumps to do the
same thing, although the technology would probably result is stronger
local B fields from the peltier device and require more power.? The
insulated foam box and proportional heater is also probably the
cheapest approach considering the need to keep overall costs for the
expected users low.
Regards,
Jules
On 7/31/2020 10:26 AM, David Witten wrote:
Hyomin,
I'm not certain what the next step should be.? Julius is hoping for
further response from PNI on this subject.
If temperature compensation does account for the differences in
observed response I would think that the important thing to? do may
be to find a way to calibrate out the discrepancy.? Then we can look
at insulation to further minimize the effect.
Calibration will hopefully give us more meaningful values to begin?with.
Insulation will dampen the effect of those behaviors over short
timespans.
Fortunately, neither requires changes?in the basic circuit, just
adjustments to the data collection and device packaging.
Dave
On Fri, Jul 31, 2020 at 9:10 AM Kim, Hyomin <<a class="moz-txt-link-abbreviated" href="mailto:hmkim@njit.edu">hmkim@njit.edu</a> <a class="moz-txt-link-rfc2396E" href="mailto:hmkim@njit.edu"><mailto:hmkim@njit.edu></a>
<a class="moz-txt-link-rfc2396E" href="mailto:hmkim@njit.edu"><mailto:hmkim@njit.edu></a> <a class="moz-txt-link-rfc2396E" href="mailto:hmkim@njit.edu"><mailto:hmkim@njit.edu></a>> wrote:
??? Hi Dave
??? Sorry that I've been out of the loop for a while as I was
??? completely caught up with something else. May I ask you what the
??? current status is?
??? I can visit Jenny Jump if there is something that I can do. At
??? this moment, I cannot think of anything that can be fixed from my
??? end.
??? If the temperature compensation is the issue, I could install
??? insulations around the sensor.
??? Hyomin
??? NJIT logo
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??? ? *Hyomin Kim*
??? Assistant Professor
??? Physics
??? Center for Solar-Terrestrial Research
??? Institute for Space Weather Sciences
<a class="moz-txt-link-abbreviated" href="mailto:hmkim@njit.edu">hmkim@njit.edu</a> <a class="moz-txt-link-rfc2396E" href="mailto:hmkim@njit.edu"><mailto:hmkim@njit.edu></a> <a class="moz-txt-link-rfc2396E" href="mailto:hmkim@njit.edu"><mailto:hmkim@njit.edu></a> <a class="moz-txt-link-rfc2396E" href="mailto:hmkim@njit.edu"><mailto:hmkim@njit.edu></a>?? (973)?596-5704
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??? 104 Tiernan Hall, 161 Warren Street, Newark, NJ 07102
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Message: 2
Date: Fri, 31 Jul 2020 13:37:51 -0400
From: "David G. McGaw"<a class="moz-txt-link-rfc2396E" href="mailto:david.g.mcgaw@dartmouth.edu"><david.g.mcgaw@dartmouth.edu></a> <a class="moz-txt-link-rfc2396E" href="mailto:david.g.mcgaw@dartmouth.edu"><mailto:david.g.mcgaw@dartmouth.edu></a>
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Subject: Re: [TangerineSDR] Mag update?
Message-ID:<a class="moz-txt-link-rfc2396E" href="mailto:f86f2596-ef2b-25c7-5b12-3f83c4429cb3@dartmouth.edu"><f86f2596-ef2b-25c7-5b12-3f83c4429cb3@dartmouth.edu></a> <a class="moz-txt-link-rfc2396E" href="mailto:f86f2596-ef2b-25c7-5b12-3f83c4429cb3@dartmouth.edu"><mailto:f86f2596-ef2b-25c7-5b12-3f83c4429cb3@dartmouth.edu></a>
Content-Type: text/plain; charset="utf-8"; Format="flowed"
Interesting, this, as it says on the RM3100 webpage "Measurements are
stable over temperature and inherently free of offset drift" and a
temperature coefficient is not even mentioned in the specs.
David N1HAC
On 7/31/20 11:44 AM, Julius Madey via TangerineSDR wrote:
One more thought.? I've asked PNI for information both on temperature
and supply voltage sensitivity, the only two variables I could think
of besides the need to minimize local B fields due to currents in
circuit board traces, nearby wiring, etc.
I did not find data on the temperature stability of the 3.3 volt
regulator Dave's JJ board? is using but the regulator I used with the
original adapter board Dave sent me has about 5 millivolts of change
out of 3.3 volts between 25 and 50 C and Dave's is probably similar.?
That doesn't seem like enough change to produce the observed
variations but that information was given to PNI as well.
On 7/31/2020 10:26 AM, David Witten wrote:
Hyomin,
I'm not certain what the next step should be.? Julius is hoping for
further response from PNI on this subject.
If temperature compensation does account for the differences in
observed response I would think that the important thing to? do may
be to find a way to calibrate out the discrepancy.? Then we can look
at insulation to further minimize the effect.
Calibration will hopefully give us more meaningful values to begin?with.
Insulation will dampen the effect of those behaviors over short
timespans.
Fortunately, neither requires changes?in the basic circuit, just
adjustments to the data collection and device packaging.
Dave
On Fri, Jul 31, 2020 at 9:10 AM Kim, Hyomin <<a class="moz-txt-link-abbreviated" href="mailto:hmkim@njit.edu">hmkim@njit.edu</a> <a class="moz-txt-link-rfc2396E" href="mailto:hmkim@njit.edu"><mailto:hmkim@njit.edu></a>
<a class="moz-txt-link-rfc2396E" href="mailto:hmkim@njit.edu"><mailto:hmkim@njit.edu></a> <a class="moz-txt-link-rfc2396E" href="mailto:hmkim@njit.edu"><mailto:hmkim@njit.edu></a>> wrote:
??? Hi Dave
??? Sorry that I've been out of the loop for a while as I was
??? completely caught up with something else. May I ask you what the
??? current status is?
??? I can visit Jenny Jump if there is something that I can do. At
??? this moment, I cannot think of anything that can be fixed from my
??? end.
??? If the temperature compensation is the issue, I could install
??? insulations around the sensor.
??? Hyomin
??? NJIT logo
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??? ? *Hyomin Kim*
??? Assistant Professor
??? Physics
??? Center for Solar-Terrestrial Research
??? Institute for Space Weather Sciences
<a class="moz-txt-link-abbreviated" href="mailto:hmkim@njit.edu">hmkim@njit.edu</a> <a class="moz-txt-link-rfc2396E" href="mailto:hmkim@njit.edu"><mailto:hmkim@njit.edu></a> <a class="moz-txt-link-rfc2396E" href="mailto:hmkim@njit.edu"><mailto:hmkim@njit.edu></a> <a class="moz-txt-link-rfc2396E" href="mailto:hmkim@njit.edu"><mailto:hmkim@njit.edu></a>?? (973)?596-5704
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??? 104 Tiernan Hall, 161 Warren Street, Newark, NJ 07102
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