Edward Ullman

ɓii aadama
Jinsu	gorko
Ɓii-leydiyankaaku	Dowlaaji Dentuɗi
Inditirde	Edward Louis Ullman
Innde	Edward
Innde ɓesngu	Ullman
Ɗuubi daygo	24 Morso 1912
Ɗoforde	Chicago
Date of death	1976
Place of death	Seattle
Father	Berthold Ullman
Sana'aji	geographer
Field of work	transport geography
Employer	University of Washington
Janngi to	University of Chicago
Professorship	full professor
Memba en	Regional Science Association International

Edward Louis Ullman (1912 – 1976), ɓiy ganndo ɓooyɗo biyeteeɗo Berthold Ullman, janngi ko ganndal leydi to duɗal jaaɓi haaɗtirde Chicago ɗo o heɓi semmbe e teeŋtin’de wuro e faggudu e nder ganndal renndo. Ko o joogaraafi wuro, wiɗtiyanke yah-ngartaa e karallo ko faati e ƴellitaare diiwaan, o wonti kadi jaambaaro joogaraafi kuutorteeɗo.Jannde makko e dissertation makko e fannuuji faggudu Mobile, Ullman fuɗɗii golle jaŋde transit. Ko kanko wonnoo Biro toppitiiɗo ko fayti e yah-ngartaa e wolde adunaare ɗimmere

Caggal konu o waɗi ko laftinaande nder United States Navy Reserve e o laati mo jaajotooɗo nder United States Maritime Commission. O waɗi kadi kuugal kuugal ngam ardiiɓe ardiiɓe dowla nder Pentagon e nder Daartol Dowla. Nder hitaande 1951 o fuɗɗi kuuɗe maako nder jaangooje nder jaangooji nder jaangoji Washington, o laati Fulbright jannginoowo nder jaango Sapienza nder Roma nder hitaande 1956-1957. O waɗi kuuɗe jaŋde nder lesdi Jarmal e Isra'iila. Jaɓɓorgo Kewuuji pinal e Amtrak naftiri e kuugal maako nder duuɓi maɓɓe.

O holli wonde jaaynde woni hawtaade dow kuuɗe tati: hawtaade, fursatuuji hawtaade e jaayɗe.

Ɗuum darnde hawtaade ina waawi taƴde e laawol gravity:

$I_{i,j}={\frac {p_{i}p_{j}}{d_{i,j}^{\beta }}}$

I: Ɗuurol hawtaade hakkunde i, j. ko wayi no, ɗuuɗal jaaynde hakkunde i, j.
P_i = yimɓe i
d_i,j = yaasi hakkunde i,j
β = footiindi

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