Government College

About: Government College is a based out in . It is known for research contribution in the topics: Population & Ring (chemistry). The organization has 4481 authors who have published 5986 publications receiving 57398 citations.

A Unified Shear Deformation Theory for the Bending of Isotropic, Functionally Graded, Laminated and Sandwich Beams and Plates

Abstract: In this paper, a displacement-based unified shear deformation theory is developed for the analysis of shear deformable advanced composite beams and plates. The theory is developed with the inclusio...

Search for possible fusion reactions to synthesize the superheavy element Z =121

Abstract: We have studied the $\ensuremath{\alpha}$-decay properties of superheavy nuclei $Z=121$ in the range $265\ensuremath{\le}A\ensuremath{\le}316$. A detailed study of competition between $\ensuremath{\alpha}$ decay and fission enables us to identify the possible isotopes for superheavy element $Z=121$. The nuclei $^{299--304}121$ were found to have long half-lives and hence they could be detected if synthesized in a laboratory. After identifying the possible isotopes, we have identified the most probable projectile-target combinations by studying the fusion cross section, evaporation residue cross section, compound nucleus formation probability (${P}_{\mathrm{CN}}$), and survival probability (${P}_{\mathrm{Surv}}$) of different projectile-target combinations to synthesize the superheavy element $Z=121$. The most probable projectile-target combinations to synthesize the superheavy nuclei $^{299--305}121$ is $\mathrm{V}+\mathrm{Cf}$. The predicted $\ensuremath{\alpha}$-decay half-lives and projectile-target combinations play a vital role in the synthesis of the superheavy element $Z=121$.

Adaptive fuzzy sliding mode control for robust trajectory tracking control of an autonomous underwater vehicle

Abstract: In this study, a robust and adaptive tracking control is designed for a complete nonlinear model of an autonomous underwater vehicle. The tracking control is accomplished by proposing an adaptive fuzzy sliding mode control (AFSMC) scheme. Firstly, the fuzzy control rules are derived using the Lyapunov energy function to minimize the chattering in the control signal, which is commonly appeared in conventional sliding mode control. Furthermore, an adaptive control law is obtained to adapt the fuzzy consequent parameter of a fuzzy logic controller which enhances the stability of the whole system. Simulations were carried out under different sets of reference trajectories to test the potency of the AFSMC. The proposed method not only eliminates the problem of chattering but also reduces the steady-state errors in tracking control. In addition, due to adaptive control law, the proposed AFSMC is effective in adapting the unknown lumped uncertainty acting on the vehicle dynamics.

Phase morphology, thermomechanical, and crystallization behavior of uncompatibilized and PP-g-MAH compatibilized polypropylene/polystyrene blends

Abstract: In this article, we discuss the phase morphology, thermal, mechanical, and crystallization properties of uncompatibilized and compatibilized polypropylene/polystyrene (PP/PS) blends. It is observed that the Young's modulus increases, but other mechanical properties such as tensile strength, flexural strength, elongation at break, and impact strength decrease by blending PS to PP. The tensile strength and Young's modulus of PP/PS blends were compared with various theoretical models. The thermal stability, melting, and crystallization temperatures and percentage crystallinity of semicrystalline PP in the blends were marginally decreased by the addition of amorphous PS. The presence of maleic anhydride-grafted polypropylene (compatibilizer) increases the phase stability of 90/10 and 80/20 blends by preventing the coalescence. Hence, finer and more uniform droplets of PS dispersed phases are observed. The compatibilizer induced some improvement in impact strength for the blends with PP matrix phase, however fluctuations in modulus, strength and ductility were observed with respect to the uncompatibilized blend. The thermal stability was not much affected by the addition of the compatibilizer for the PP rich blends but shows some decrease in the thermal stability of the blends, where PS forms the matrix. On the other hand, the % crystallinity was increased by the addition of compatibilizer, irrespective of the blend concentration. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42100.