The construction of an underground charnber with
geomechanical considerations
ایرج شمس ملک
آرا
author
text
article
1974
per
University College of Engineering
دانشکده فنی
08031026
28
v.
0
no.
1974
https://jfe.ut.ac.ir/article_26704_0496f70543fc0d274c2d104898947629.pdf
Minimum inertia balance w eight
منصور نیک خواه
بهرامی
author
text
article
1974
per
The optimum shape of balance weights is determined, using two different
criteria. According to one, one of the balance weights should have minimum size.
While the other requires that the mass moment of inertia about the axis of
rotation should be minimum. In the second case, the calculus of variation is
used to determine the optimum shape. Graphs are presented to enable designers
to find the dimensions of the required balance weights for using either of the
two criteria .
University College of Engineering
دانشکده فنی
08031026
28
v.
0
no.
1974
https://jfe.ut.ac.ir/article_26705_c51ee9c693ff680f790d467178dc2e47.pdf
Problem s of scientific research in Iran
فرخ محمد زاده
فرحان
author
text
article
1974
per
The progress of higher education and scientific. research in – Iran has
been noteworthy in recent years . The measures taken by Iranian Universities,
specially Teheran University, have been effective in promoting research work .
However, compared with industrial achievements and economic growth rate of
the country, this expansion seems to be sluggish and insufficient. Renewed
impetus to scientific and technological research should be seriously considered.
Some of the problems and drawbacks that have hindered the rapid growth of
research activity in Iran are studied under seven headlines . Some of the steps
to be taken to remedy for these difficulties are reviewed and a few proposals
made .
University College of Engineering
دانشکده فنی
08031026
28
v.
0
no.
1974
https://jfe.ut.ac.ir/article_26706_cf6269cea52e0e0895be144759d4d3af.pdf
Metamorphic problems of south Iran
بیژن
مجیدی
author
text
article
1974
per
The Metamorphic complexes of south Iran (namely Sirdjan, HadjiAbad
and DolatAbad) are conspicuously related to two different cycles of orogeny
and metamorphism .
These two cycles are distinctly separate and have been mapped as such
throughout the Hadji  Abad area .
The older phase is definitely PreCambrin, whereas the younger is considered
to be Early  Kimmerian .
University College of Engineering
دانشکده فنی
08031026
28
v.
0
no.
1974
https://jfe.ut.ac.ir/article_26707_5c69296c76b9e7553a561595944d3ced.pdf
The three  body  problem
نصرالله
تابنده
author
text
article
1974
per
It has been tried to give a brief qualitative treatment of the wellknown
threebody problem. The restricted problem of three bodies is studied and
possible regions of motion according to the "energy of the system are explained.'.
The general problem is also studied qualitatively using1the Jacobian coordinates,
the Lagrange  Jacobi eqation and the Sundman inequality for the moment
of inertia and energy of the system .
University College of Engineering
دانشکده فنی
08031026
28
v.
0
no.
1974
https://jfe.ut.ac.ir/article_26708_fda8bf71d3f12b293e68c3b62b6c2975.pdf
o  Blocking  Circuits
حبیب الله
رشوند
author
text
article
1974
per
Iran is a rather wide country, and, as a rule, the chrage per one call in
S. T .D . (Subscriber Trunk Dialing ) is required more compared with a local
call , So, just after the opening of the STD service widely in national telephone
network, unconcerned use of the S. T. D. service has been caused on an incon
ceivable increase in telephone charge of th subscriber. This is a common problem
for all subscribers from home telephone to private or govermental offices.
Then, many subscribers requested to have a device available to control
trunk dialing. Therefore TCI (Telecommunication Company of Iran) asked us
to solve this problem specially for governmental offices .
We recommended several methods to T. C. I. for controlliug of toll dialing
such as rearrangement of wiring in telophone offices, applying the counting
method, applying the AC signalling method, and so on.
This report is the main part of our recommendation about «0» blocking
by impulse counting method.
In this article, four circuits arc presented , which have been developed
one by one in our ladoratory. So we have improved the device from the first
circuit to the next, and in some steps the circuit has been fully modified .
There are many interesting points, mentioned hereafter that we may say
they are suitable circuits. The first and second circuits have to be installed in
telephone offices .
The first circuit begins to count 1200 ms since the arrival of first dial
pulse in the first digit, but in the succee ding three circuits IS applied another
method called only first digit counting .
The third circuit should be connected to telephone line on telephone set
or PBX (Private Branch exchange), with a high parallel resistance (more than
3MEG OHMS) .
The fourth circuit employs only a very low resistance (1 to 2 OHMS) in
senes to the line , and provides two considerable features, no restriction for
connecting point of the circuit to the subscriber's line, and no using any de
current during hook on as previous one .
The consideration in those circuits were studied as follows;
1) Reasonable price
2) Small Size
3) Using a 5 Volt de power supply only
4) Wide range for acceptable speed of dial with high reliability to count
the pulse
5) Using a _very high resistance In parallel or a very low resistance In
series,
6) Using power off relay circuit and emergency battery .
University College of Engineering
دانشکده فنی
08031026
28
v.
0
no.
1974
https://jfe.ut.ac.ir/article_26709_2251466e58dfd811b59a3313229bb086.pdf
Pollution of water by insecticides
مرتضی
حسینیان
author
text
article
1974
per
Fifty percent of world argricultural production is destroyed by insects
each year. Therefore, enormous quantities of insecticides are consumed to
control these pests. As an example, France is using 35000 metric tons insecticide
every year. Some of the methods used for spraying and applying insecticides
tend to increase the pollution of natural waters .
In this article different factors causing water pollution by insecticides are
reviewed and studied briefly.
University College of Engineering
دانشکده فنی
08031026
28
v.
0
no.
1974
https://jfe.ut.ac.ir/article_26710_24406640621a613b097af58593337bbb.pdf
Simplifying pressure  drop calculation
فیروز
رسولی
author
text
article
1974
per
University College of Engineering
دانشکده فنی
08031026
28
v.
0
no.
1974
https://jfe.ut.ac.ir/article_26711_acca080a0668bc39ae8d23368d4b1e02.pdf
Dynamic behaviour of solvent extraction processes
طاهره
کاغذچی
author
مرتضی
سهرابی
author
text
article
1974
per
The dynamic behaviour of these processes involves the relationships between
time de pendent inputs and the output variables which also vary with time.
The unsteady  tate characteristics of processes are important in two
classes of problems; viz :
I  Start up problems
II Control problems
In the present paper a simplified treatment of the dynamic behaviour of
a mixer  settler unit is considered , first theoretically and then experimentally.
Also the literatuer on solvent  extraction dynamics is reviewed and
discussed .
University College of Engineering
دانشکده فنی
08031026
28
v.
0
no.
1974
https://jfe.ut.ac.ir/article_26712_716bdf83303cb3fdd1d3b2c471240361.pdf
Calculation of "a .c. resistance" of bimetal wire
فرخ
آرزم
author
text
article
1974
per
University College of Engineering
دانشکده فنی
08031026
28
v.
0
no.
1974
https://jfe.ut.ac.ir/article_26713_29451ab83923e7e61b1b725496cff871.pdf
Network formulation for power system analysis
فرخ حبیبی
اشرفی
author
text
article
1974
per
This paper presents as a brief introduction , the basic principles of matrix
algebra for an alysing the power system problems with Digital Computers.
The material contained in the text are as follows: Primitive network,
topology of electrical network, transformation of coordinates, bus admittance and
bus impedance matrix.
University College of Engineering
دانشکده فنی
08031026
28
v.
0
no.
1974
https://jfe.ut.ac.ir/article_26714_efdcd0cf5011cd1456cc2110d709acba.pdf
Plant microfossils from Shahrud coaly sediments
ابوالفضل جامع
الصنایع
author
text
article
1974
per

University College of Engineering
دانشکده فنی
08031026
28
v.
0
no.
1974
https://jfe.ut.ac.ir/article_26715_8d3bb2ab963cd8e567406682838d4275.pdf
Desinfection of water by Chemical oxidants
مرتضی
حسینیان
author
text
article
1974
per
Boiling of water for its purification has been recommended since 500 B. O.
Modern desinfecition methods involve specialized treatments for the purpose
of destroying or inactivating pathogenic organisms . Different factors .in flu 
ensing the efficiency of desinfection are considered in this article Physical
and chemical methods of water desinfection are described briefly The use of
chemical oxidants in water treatment is reviewed specifically
University College of Engineering
دانشکده فنی
08031026
28
v.
0
no.
1974
https://jfe.ut.ac.ir/article_26716_eb727be18dde964a0089477dc85e6128.pdf
Investigation of the water of the Ali Sard cave  Hamedan
حسن
فرسام
author
محمد رضا
غفوری
author
محمد شریعت
پناهی
author
text
article
1974
per
University College of Engineering
دانشکده فنی
08031026
28
v.
0
no.
1974
https://jfe.ut.ac.ir/article_26717_c233d5a904e5d747c2932ce9f7f5f556.pdf
summary of life development in Mesozoic time
علی
میثمی
author
text
article
1974
per
The outstanding feature of the life of Mesozoic time is the rise to dominance
of the reptiles and their radiation into almost all modes of existence on
the lands, in the waters, and in the air . Chief place among the invertebrates
is occupied by the cephalopods which reached at this time the culmination of
their career. This is indicated by their extraordinary specialization along many
lines, multitudinous variety, and the gaint stature of some forms. The characteristic
plant group of the era is that of the cycaduphytes, though in Cretaseous
time the appearance of the highest type of seed  bearing plants, the angiospermes,
introduces modern aspects in the flora .
A paleontological description is given of 23 Footprints of dinosaurs found
In The continental Liassic formations north of Kerman. Five different type are
Recognized . Four of them are attributed to ornithopod dinosaurs , and one to
Grallator, a Coelurosaurian theropod (A. F. de Lapparent, et M. Davoud,
zadeh) .
University College of Engineering
دانشکده فنی
08031026
28
v.
0
no.
1974
https://jfe.ut.ac.ir/article_26718_65ace72102619bd1f14f569eb2434792.pdf
COmite Europeen du Beton (CEB)
مهدی
قالیبافیان
author
text
article
1974
per

University College of Engineering
دانشکده فنی
08031026
28
v.
0
no.
1974
https://jfe.ut.ac.ir/article_26719_b1e90e912cb0158984d0be7453da2ee0.pdf

unknown
author
text
article
1974
per

University College of Engineering
دانشکده فنی
08031026
28
v.
0
no.
1974
https://jfe.ut.ac.ir/article_26720_5662fdedee5ed098deaf2c3e06f7ea89.pdf

محمد علی
رحمتی
author
text
article
1974
per

University College of Engineering
دانشکده فنی
08031026
28
v.
0
no.
1974
https://jfe.ut.ac.ir/article_26721_bd9ac0e4bf9ffd5702410eec6cf54c4d.pdf

unknown
author
text
article
1974
per

University College of Engineering
دانشکده فنی
08031026
28
v.
0
no.
1974
https://jfe.ut.ac.ir/article_26722_e59f5d5ec8b88798a2bde6581ff78538.pdf