نتایج جستجو برای: since the wavefield never vanishes completely however
تعداد نتایج: 16063765 فیلتر نتایج به سال:
We demonstrate reverse-time imaging using multicomponent elastic wavefields. The elastic data are used as boundary conditions for a numeric solution to the elastic wave-equation solved using a staggeredgrid finite-difference implementation. P and S components are not separated from recorded data, but are extrapolated together as part of a vector wavefield. A straightforward extension to the cro...
this study investigated how group formation method, namely student-selected vs. teacher-assigned, influences the results of the community model of teaching creative writing; i.e., group dynamics and group outcome (the quality of performance). the study adopted an experimental comparison group and microgenetic research design to observe the change process over a relatively short period of time. ...
the extent to which written corrective feedback on linguistic errors can play a role in helping l2 writers improve the accuracy of their writing continues to be an issue of interest to researchers and teachers since truscott (1996) mounted a case for its abolition. while there is growing empirical evidence that written corrective feedback can successfully target some types of linguistic error (...
this study aimed at examining the effects of iranian efl learners’ anxiety, ambiguity tolerance, and gender on their preferences for corrective feedback (cf, henceforth). the effects were sought with regard to the necessity, frequency, and timing of cf, types of errors that need to be treated, types of cf, and choice of correctors. seventy-five iranian efl students, twenty-eight males and forty...
Neutron and nuclear beta decay correlation coefficients are sensitive to the exotic scalar tensor interactions that not included in Standard Model (SM). The proposed experiment BRAND will measure simultaneously seven neutron coefficients: H , L N R S U V depend on transverse electron polarization – a quantity which vanishes SM. Five of these correlations: were never attempted experimentally bef...
learning a second or foreign language requires the manipulation of four main skills, namely, listening, reading, speaking, and writing which lead to effective communication. it is obvious that vocabulary is an indispensible part of any communication, so without a vocabulary, no meaningful communication can take place and meaningful communication relies heavily on vocabulary. one fundamental fac...
Lehmer’s 1947 conjecture that $\tau (n)$ never vanishes is still unresolved. In this context, it natural to consider variants of conjecture. We determine many integers cannot be values (n)$. For example, among the odd numbers $\a
investigating the feasibility of a proposed model for geometric design of deployable arch structures
deployable scissor type structures are composed of the so-called scissor-like elements (sles), which are connected to each other at an intermediate point through a pivotal connection and allow them to be folded into a compact bundle for storage or transport. several sles are connected to each other in order to form units with regular polygonal plan views. the sides and radii of the polygons are...
abstract previous studies on willingness to communicate (wtc) have shown the influence of many individual or situational factors on students’ tendency to engage in classroom communication, in which wtc has been viewed either at the trait-level or situational level. however, due to the complexity of the notion of willingness to communicate, the present study suggests that these two strands are ...
to explore the idea the investingation proposed, aimed at finding whether the performances of the population of iranians students studying english in an efl context are consistent in l1 and l2 writing taks and whether there is a cross-linguistic transfer in this respect. in this regard the subjects were instructed to write four compositions-two in english and two in farsi-which consisted of an ...
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