Subject: Re: [AUDITORY] Paper Request: K=?UTF-8?Q?=C3=BCpfm=C3=BCller=2C_?=1924 From: Adam Weisser <adam_weisser@xxxxxxxx> Date: Thu, 27 Feb 2025 23:04:27 +0700--52c8dbdd1a71472aa4e54fd27f1f8ef1 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Dear Alessandro and all, Thank you, this is fantastic - much appreciated!=20 Also thanks to Elisabeth and Richard that kindly offered their help.=20 For those who wonder:=20 According to some of Gabor's comments in his seminal paper from 1946, th= e signal-processing version of the uncertainty principle was apparently = known well before that time, and possibly before Heisenberg published hi= s original quantum mechanical version in 1927. In this paper by K=C3=BCp= fm=C3=BCller he derived a relationship between the bandwidth of a band-p= ass filter that is used to intercept rectangular telegraph pulses and th= e pulse width (p. 146), which is a corollary of the uncertainty principl= e. There may be earlier examples in print, but that's the first one I'm = aware of.=20 All the best, Adam. Gabor, Dennis. Theory of communication. Part 1: The analysis of informat= ion. Journal of the Institution of Electrical Engineers-Part III: Radio = and Communication Engineering, 93(26):429-457, 1946. Heisenberg, W. =C3=9Cber den anschaulichen Inhalt der quantentheoretisch= en Kinematik und Mechanik. Zeitschrift f=C3=BCr Physik, 43:172-198, 1927. On Thu, Feb 27, 2025, at 10:30 PM, Alessandro Tavano wrote: > Dear Adam, >=20 > here is the paper, courtesy of the Library services of the Max Planck = Institute. >=20 > Regards, > Alessandro >=20 >=20 >=20 >> On 25. Feb 2025, at 07:56, Adam Weisser <adam_weisser@xxxxxxxx> wr= ote: >>=20 >> Dear all, >>=20 >> Does anybody happen to have a copy of this paper: >>=20 >> K=C3=BCpfm=C3=BCller, K. =C3=9Cber Einschwingvorgange in Wellenfilter= n (Transient phenomena in wave filters). Elektrische Nachrichten-Technik= , 1:141 -152, 1924. >>=20 >> As far as I can tell, it's never been officially digitized. >>=20 >> Thank you in advance, >> Adam. >=20 > Dr. Alessandro Tavano > a.tavano@xxxxxxxx > alessandro.tavano.office@xxxxxxxx > https://orcid.org/0000-0002-2096-5542 > https://github.com/peopleslab > Goethe University, Frankfurt am Main >=20 > *Attachments:* > =E2=80=A2 Ku=CC=88pfmu=CC=88ller (1924)-UEber Einschwingvorgange in W= ellenfiltern.pdf --52c8dbdd1a71472aa4e54fd27f1f8ef1 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable <!DOCTYPE html><html><head><title></title><style type=3D"text/css">=0Ap.= MsoNormal,p.MsoNoSpacing{margin:0}</style></head><body><div style=3D"fon= t-family:Arial;">Dear Alessandro and all,<br></div><div style=3D"font-fa= mily:Arial;"><br></div><div style=3D"font-family:Arial;">Thank you, this= is fantastic - much appreciated! <br></div><div style=3D"font-family:Ar= ial;"><br></div><div style=3D"font-family:Arial;">Also thanks to Elisabe= th and Richard that kindly offered their help. <br></div><div style=3D"f= ont-family:Arial;"><br></div><div style=3D"font-family:Arial;">For those= who wonder: <br></div><div style=3D"font-family:Arial;">According to so= me of Gabor's comments in his seminal paper from 1946, the signal-proces= sing version of the uncertainty principle was apparently known well befo= re that time, and possibly before Heisenberg published his original quan= tum mechanical version in 1927. In this paper by K=C3=BCpfm=C3=BCller he= derived a relationship between the bandwidth of a band-pass filter that= is used to intercept rectangular telegraph pulses and the pulse width (= p. 146), which is a corollary of the uncertainty principle. There may be= earlier examples in print, but that's the first one I'm aware of. <br><= /div><div style=3D"font-family:Arial;"><br></div><div style=3D"font-fami= ly:Arial;"><div style=3D"font-family:Arial;">All the best,<br></div><div= style=3D"font-family:Arial;">Adam.<br></div></div><div style=3D"font-fa= mily:Arial;"><br></div><div style=3D"font-family:Arial;"><br></div><div = style=3D"font-family:Arial;">Gabor, Dennis. Theory of communication. Par= t 1: The analysis of information. Journal of the Institution of Electric= al Engineers-Part III: Radio and Communication Engineering, 93(26):429-4= 57, 1946.<br></div><div style=3D"font-family:Arial;"><br></div><div styl= e=3D"font-family:Arial;">Heisenberg, W. =C3=9Cber den anschaulichen Inha= lt der quantentheoretischen Kinematik und Mechanik. Zeitschrift f=C3=BCr= Physik, 43:172-198, 1927.<br></div><div style=3D"font-family:Arial;"><b= r></div><div style=3D"font-family:Arial;"><br></div><div style=3D"font-f= amily:Arial;"><br></div><div style=3D"font-family:Arial;"><br></div><div= >On Thu, Feb 27, 2025, at 10:30 PM, Alessandro Tavano wrote:<br></div><b= lockquote type=3D"cite" id=3D"qt" style=3D"overflow-wrap:break-word;"><d= iv>Dear Adam,<br></div><div><br></div><div>here is the paper, courtesy o= f the Library services of the Max Planck Institute.<br></div><div><br></= div><div>Regards,<br></div><div>Alessandro<br></div><div><br></div><div>= <div><br></div><div><div><br></div><blockquote type=3D"cite"><div>On 25.= Feb 2025, at 07:56, Adam Weisser <adam_weisser@xxxxxxxx> wrote= :<br></div><div><br></div><div><div><div style=3D"font-family:Arial;">De= ar all,<br></div><div style=3D"font-family:Arial;"><br></div><div style=3D= "font-family:Arial;">Does anybody happen to have a copy of this paper:<b= r></div><div style=3D"font-family:Arial;"><br></div><div style=3D"font-f= amily:Arial;">K=C3=BCpfm=C3=BCller, K. =C3=9Cber Einschwingvorgange in W= ellenfiltern (Transient phenomena in wave filters). Elektrische Nachrich= ten-Technik, 1:141 -152, 1924.<br></div><div style=3D"font-family:Arial;= "><br></div><div style=3D"font-family:Arial;">As far as I can tell, it's= never been officially digitized.<br></div><div style=3D"font-family:Ari= al;"><br></div><div style=3D"font-family:Arial;">Thank you in advance,<b= r></div><div style=3D"font-family:Arial;">Adam.<br></div></div></div></b= lockquote></div><div><br></div><div><div dir=3D"auto" style=3D"text-alig= n:start;text-indent:0px;overflow-wrap:break-word;"><div dir=3D"auto" sty= le=3D"text-align:start;text-indent:0px;overflow-wrap:break-word;"><div d= ir=3D"auto" style=3D"text-align:start;text-indent:0px;overflow-wrap:brea= k-word;"><div dir=3D"auto" style=3D"text-align:start;text-indent:0px;ove= rflow-wrap:break-word;"><div style=3D"color:rgb(0, 0, 0);letter-spacing:= normal;text-transform:none;text-wrap-mode:wrap;white-space-collapse:coll= apse;word-spacing:0px;text-decoration-color:currentcolor;text-decoration= -line:none;text-decoration-style:solid;text-decoration-thickness:auto;-w= ebkit-text-stroke-width:0px;"><div>Dr. Alessandro Tavano<br></div><div>a= .tavano@xxxxxxxx<br></div><div>alessandro.tavano.office@xxxxxxxx= ail.com<br></div></div><div>https://orcid.org/0000-0002-2096-5542<br></d= iv><div><div>https://github.com/peopleslab<br></div><div>Goethe Universi= ty, Frankfurt am Main<br></div></div></div></div></div></div></div></div= ><div><br></div><div><b>Attachments:</b><br></div><ul><li>Ku=CC=88pfmu=CC= =88ller (1924)-UEber Einschwingvorgange in Wellenfiltern.pdf<br></li></u= l></blockquote><div style=3D"font-family:Arial;"><br></div></body></html= > --52c8dbdd1a71472aa4e54fd27f1f8ef1--