نتایج جستجو برای: fall velocity
تعداد نتایج: 211021 فیلتر نتایج به سال:
در این پروژه به مطالعه رفتار غیرمنتظره سطح مقطع های همجوشی در انرژی های پایین تر از سد کولنی پرداخته ایم. برای این منظور از واکنش همجوشی یون های سنگین، که در آن ها مقدارq منفی می باشد، استفاده کرده ایم. به طورکلی منظور از رفتار غیرمنتظره، کاهش ناگهانی مقادیرسطح مقطع آزمایشگاهی steep fall offنسبت به مدل های تئوری نظیر آکیوز- وینتر می باشد که دلیل آن را می توان ناشی از یک عامل بازدارنده همجوشی (f...
The unsteady free convection flow with thermal radiation past a vertical plate with Newtonian heating has been studied. The governing equations have been solved numerically by the implicit finite difference method of CrankNicolson's type. The variations of the fluid velocity and temperature are presented graphically. It is found that the fluid velocity decreases near the plate and it incre...
The Zenneck THz surface wave (Z-TSW) on metals is discussed with respect to its difficulty in generation and measurement. The spatial collapse of the extent of the Z-TSW evanescent field, upon the addition of a sub-wavelength dielectric layer on the metal surface, is explained by a simple model, in good agreement with exact analytical theory. Experimental measurements of the THz surface wave on...
Motor conduction velocity was measured in the median, ulnar and common peroneal nerves of 32 diabetics with clinical features of autonomic neuropathy. The responses to the Valsalva manoeuvre and sustained handgrip, and the postural fall in blood pressure were used to assess the integrity of the autonomic nervous system. Abnormalities in the three autonomic function tests were significantly corr...
The reaction 28 Si + 181 Ta has been studied at E Lab =125 and 135 MeV. Coincidences between high energy particles and various X-and γ-rays from abnormally long-lived states were observed. e.g. 7.8-8.6 MeV α-particles with γ-rays of a superdeformed band, 5.1-5.5 MeV α-particles with X-and γ-rays of W, Re, and Pt, and 3.88 MeV particles (interpreted as protons) with 185.8 keV γ-rays. The data ar...
Artificial reverberation is an important music production tool with a strong but poorly understood perceptual impact. A literature review of the relevant works concerned with the perception of musical reverberation is provided, and the use of artificial reverberation in multisource mixes is studied. The perceived amount of total artificial reverberation in a mixture is predicted using relative ...
Observations of traveling ionospheric disturbances (TIDs) associated with atmospheric gravity waves (AGWs) generated by the moving solar terminator have been made with the Millstone Hill incoherent scatter radar. Three experiments near 1995 fall equinox measured the AGW/TID velocity and direction of motion. Spectral and cross-correlation analysis of the ionospheric density observations indicate...
The semileptonic CP asymmetry in B-B̄ mixing, asl, is measured in proton-proton collision data, corresponding to an integrated luminosity of 3.0 fb−1, recorded by the LHCb experiment. Semileptonic B decays are reconstructed in the inclusive final states D−μþ and D −μþ, where the D− meson decays into theKþπ−π− final state and theD − meson into the D̄0ð→ Kþπ−Þπ− final state. The asymmetry between t...
In this paper we compute the radiation of the massless closed string states due to the non-vanishing coupling to the rolling open string tachyon with co-dimensions larger than 3, and discuss the effect of back reaction to the motion of the rolling tachyon. We find that for small string coupling, the tachyonic matters remain in the late time, but it will completely evaporate away over a string s...
The light quarks inside B mesons are usually treated as spectators and do not affect the decay rates which are assumed to be purely due to b quark decays. In this paper we calculate the non-spectator contributions to inclusive charmless B decays due to the spectator effects. We find that the non-spectator contributions to the branching ratio for B̄ are small (< 2 × 10), but the contributions to ...
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