نتایج جستجو برای: دهۀ 1370
تعداد نتایج: 3170 فیلتر نتایج به سال:
در این پژوهش این موضوع مورد بحث قرار گرفته است که به دنبال برنامه های نوسازی و مدرن سازی پهلوی نوعی سرگشتگی (آنومی) در جامعه ایران پدید آمد این سرگشتگی معلول گسستن ازهمبستگی های سنتی قدیمی، و در حال گذر قرار گرفتن به سمت همبستگی های جدید بود و با توجه به خصوصیات روانی - اجتماعی جامعه سرگشته و نیاز آن ها به تعریف و معنابخشی زندگی، حضرت امام خمینی (ره) و در کنار او شهید مطهری و دکتر علی شریعتی تو...
Here, we report a two-step synthesis of graphene/sulfur/carbon ternary composite with a multilayer structure. In this composite, ultrathin S layers are uniformly deposited on graphene nanosheets and covered by a thin layer of amorphous carbon derived from β-cyclodextrin on the surface. Such a unique microstructure, not only improves the electrical conductivity of sulfur, but also effectively in...
We discuss the theoretical expectations and phenomenological evidence for the lightest glueballs and the members of the meson nonet with quantum numbers J PC = 0 ++. We reconsider the recent evidence for candidate states with masses below 1700 MeV, but include also the results from earlier phase-shift analyses. Arguments are presented to classify the scalars f 0 (980) and f 0 (1500) as members ...
Transfer entropy is a measure of the magnitude and the direction of information flow between jointly distributed stochastic processes. In recent years, its permutation analogues are considered in the literature to estimate the transfer entropy by counting the number of occurrences of orderings of values, not the values themselves. It has been suggested that the method of permutation is easy to ...
As the duration of rover missions increases (the Mars Exploration Rovers are each currently beyond 1370 sols on the Martian surface), a wider variety of terrain types (slopes, soil types, etc) will usually be accessed. It is extremely important that a simulation environment used for flight systems has the necessary fidelity to model rover mobility on sloped, uneven terrain such as that encounte...
Single-wall boron nitride nanotubes samples synthesized by laser vaporization of a hexagonal BN target under a nitrogen atmosphere are studied by UV and visible Raman spectroscopy. We show that resonant conditions are necessary for investigating phonon modes of BNNTs. Raman excitation in the UV (229 nm) provides preresonant conditions, allowing the identification of the A1 tangential mode at 13...
The very recently observed D(*)(sJ)(2317)(+) meson is described as a quasibound scalar csmacr; state in a unitarized meson model, owing its existence to the strong 3P0 Okubo-Zweig-Iizuka-allowed coupling to the nearby S-wave DK threshold. By the same mechanism, a scalar D(*)(0)(2100-2300) resonance is predicted above the Dpi threshold. These scalars are the charmed cousins of the light scalar n...
Restriction mapping of genes by capillary electrophoresis with laser-induced fluorescence detection.
Restriction mapping is one of the essential steps in gene analysis and molecular biology studies. Slab gel electrophoresis is the traditional way to separate DNA fragments for restriction mapping. However, slab gel electrophoresis does not provide sufficient resolution as required in many mapping applications, and the use of radioisotopes in traditional mapping methods creates health hazards. I...
A bstract Using 6 . 32 fb ? 1 of e + collision data collected at the center-of-mass energies between 4.178 and 4.226 GeV with BESIII detector, we perform an amplitude analysis decay $$ {D}_s^{+} D s + ? K ? determine amplitudes various intermediat...
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