Null Strings in Schwarzschild Spacetime [PDF]
, 1996 The null string equations of motion and constraints in the Schwarzschild spacetime are given. The solutions are those of the null geodesics of General Relativity appended by a null string constraint in which the "constants of motion" depend on the world ...
A. A. Zheltukhin +19 more
core +2 more sources
The effect of thermal stresses on the immune system of the potato tuber moth, Phthorimaea operculella (Lepidoptera: Gelechiidae) [PDF]
نامه 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
A Syntactic Analysis of Ergative Case Marking in some Iranian Languages: A minimalist View [PDF]
زبان 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
, 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
Causal structure and degenerate phase boundaries [PDF]
, 1999 Timelike and null hypersurfaces in the degenerate space-times in the Ashtekar theory are defined in the light of the degenerate causal structure proposed by Matschull. Using the new definition of null hypersufaces, the conjecture that the "phase boundary"
A. Ashtekar +14 more
core +3 more sources
Adaptive Learning Pedagogy of Universal Design for Learning (UDL) for Multimodal Training
Journal of Aviation/Aerospace Education & Research, 2018 Traditionally, students or trainees usually receive training through a unidirectional instructional approach that can lack interactive activities or through a single material source in classrooms.
Ziho Kang +6 more
doaj +1 more source
Assessment of causal relationships between teaching skills and students’ academic progress with the mediating role of positive and negative emotions and perceived control using the Structural Equation Modeling approach [PDF]
مطالعات روانشناسی تربیتی, 2018 The present study aimed to assess the causal relationships between teaching skills and students’ academic progress with the mediating role of positive and negative emotions and perceived control using the structural equation structural equation modeling ...
mostafa bagherian far +2 more
doaj +1 more source
The effect of the curriculum integration approach on the academic achievement of fourth grade female students in Khash city [PDF]
مطالعات روانشناسی تربیتی, 2019 The purpose of this study was to investigate the effect of the curriculum integration approach on the academic achievement of fourth grade female students in Khash city. The research method is quasi-experimental.
tahere hashemnejad +2 more
doaj +1 more source
, 2019 We show that the BMS-supertranslations and their associated supermomenta on past null infinity can be related to those on future null infinity, proving the conjecture of Strominger for a class of spacetimes which are asymptotically-flat in the sense of ...
Prabhu, Kartik
core +1 more source
Reliability assessment of null allele detection: inconsistencies between and within different methods [PDF]
, 2014 Microsatellite loci are widely used in population genetic studies, but the presence of null alleles may lead to biased results. Here we assessed five methods that indirectly detect null alleles, and found large inconsistencies among them.
Avise +31 more
core +1 more source