Results 31 to 40 of about 5,320,214 (293)

Assessment of Behavior Factor for Steel Plate Shear Wall with Reinforced Concrete Moment Surrounded Frame [PDF]

open access: yesJournal of Structural and Construction Engineering, 2019
The steel shear wall is an appropriate resistant system against lateral loads that is been utilized in modern high-rise buildings and upgrading existing buildings because of numerous benefits.
Madjid Gholhaki   +2 more
doaj   +1 more source

The effect of thermal stresses on the immune system of the potato tuber moth, Phthorimaea operculella (Lepidoptera: Gelechiidae) [PDF]

open access: yesنامه انجمن حشره‌شناسی ایران, 2018
The hemocytes of insects are one of important components of immune system of insects against various stresses such as pathogens attack, parasitoids, starvation period and temperature changes.
z. Pourali, Maryam Ajam Hassani
doaj   +1 more source

Formulation design, preparation and characterization of drug carrier polysaccharide nanocomposite containing Curcumin [PDF]

open access: yesشیمی کاربردی روز, 2020
In this research, with the aim of improve the loading efficiency and particle size Chitosan (CS)-Montmorillonite (MMT) nanocomposite were prepared using a ionic gelatinization method for controlled delivery of curcumin.
mahdieh chegeni, shabnam jahani zadeh
doaj   +1 more source

Schild's Null Strings in Flat and Curved Backgrounds [PDF]

open access: yes, 1995
Schild's null (tensionless) strings are discussed in certain flat and curved backgrounds. We find closed, stationary, null strings as natural configurations existing on the horizons of spacetimes which possess such null hypersurfaces.
A. A. Zheltukhin   +22 more
core   +3 more sources

A Syntactic Analysis of Ergative Case Marking in some Iranian Languages: A minimalist View [PDF]

open access: yesزبان پژوهی, 2019
Tatic-type languages are among west Iranian languages divided into four main groups: northern Tatic, central Tatic, southern Tatic and Taleshi group (Stilo, 1981, p. 139).
Ifa Shafai, Mohammad Dabirmoghaddam
doaj   +1 more source

Maximum Principles for Null Hypersurfaces and Null Splitting Theorems

open access: yes, 1999
A maximum principle for C^0 null hypersurfaces is obtained and used to derive a splitting theorem for spacetimes which contain null lines. As a consequence of this null splitting theorem, it is proved that an asymptotically simple vacuum (Ricci flat ...
Galloway, Gregory J.
core   +1 more source

Prioritizing of repair and rehabilitation for concrete bridges of road network in Khorasan Razavi province, using analytical hierarchy process (AHP) [PDF]

open access: yesJournal of Structural and Construction Engineering, 2019
Considering the necessity of developing the road network, bridges as infrastructures, play a key role in helping and sustaining vital activities in the recovery phase after natural disasters and events.
Soheil Ghareh   +2 more
doaj   +1 more source

Null twisted geometries

open access: yes, 2014
We define and investigate a quantisation of null hypersurfaces in the context of loop quantum gravity on a fixed graph. The main tool we use is the parametrisation of the theory in terms of twistors, which has already proved useful in discussing the ...
Speziale, Simone, Zhang, Mingyi
core   +3 more sources

Matching LTB and FRW spacetimes through a null hypersurface [PDF]

open access: yes, 2007
Matching of a LTB metric representing dust matter to a background FRW universe across a null hypersurface is studied. In general, an unrestricted matching is possible only if the background FRW is flat or open.
C. Barrabès   +6 more
core   +2 more sources

Quantum Boltzman equation study for the Kondo breakdown quantum critical point

open access: yes, 2009
We develop the quantum Boltzman equation approach for the Kondo breakdown quantum critical point, involved with two bands for conduction electrons and localized fermions. Particularly, the role of vertex corrections in transport is addressed, crucial for
Kim, KS, null, Pepin, C
core   +1 more source

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