136 research outputs found
Data on the viscoelastic behavior of neoprene rubber
No full textThe present article contains data on the multi-step cyclic stress relaxation tests associated with the viscoelastic behavior of the neoprene rubber. Herein, the present data aims the accurate prediction of the time dependent mechanical behavior of the polymeric materials. The findings of the present data include the demonstration of the Mullin׳s stress-softening phenomenon, clearly. These data findings may serve as a benchmark to validate the more advanced phenomenological model developments in future as compared to the existing ones
Instability analysis of an electro-magneto-elastic actuator: A continuum mechanics approach
No full textThe study of advanced artificial electro-magneto-elastic (EME) materials recently connects the material science with the electrodynamics. In particular, EME materials established a new research direction, which provides the fruitful ideas for the advanced engineering and medical field applications. In the present paper, we introduce a continuum mechanics-based method to analyze an electro-magneto-mechanical instability (EMMI) phenomenon of a smart actuator made of an EME material. The proposed method is based on the nonlinear theory of electro-magneto-elasticity followed by the second law of thermodynamics. We develop an analytical EMMI model for a smart actuator through a new amended energy function. This amended energy function accounts the electro-magnetostriction phenomenon for a class of an incompressible isotropic EME material. Additionally, the amended energy function successfully resolves the physical interpretation issue of the Maxwell stress tensor in large deformation. The formulated continuum mechanics-based EMMI model is also compared and validated with an energy-based EMMI model existing in the literature
Instability analysis of an electro-magneto-elastic actuator: A continuum mechanics approach
No full text
Dilemmas of Trishanku
No full textThis is an interesting account of our contemporary society that is plagued with several contradictions depicted in the puranic mould. Taking the puranic character of how Trishanku was hanging in the air belonging neither here nor there, the author narrated important events and socio-economic processes that keep artisans of certain castes as displaced persons while upper castes make suitable adjustments for upward mobility. The author has identified the Three Cs, corruption, casteism and communalism as disturbing trends that tear apart present-day Indian society. He has aspired that the three Ds, development, democracy and diversity might tackle them. Using Emic and Etic approaches, the author explains his participant observations for the benefit of the perceptible reader. Around 300 pages book is reasonably priced
Universal relations in coupled electro-magneto-elasticity
No full textIn the present work, we develop a class of the coupled universal relations with the possible forms of electro-magneto-elastic (EME) deformation families in smart materials. In line with that, we adopt a classical continuum mechanics-based approach following the second law of thermodynamics. More precisely, we first formulate the deformation of an EME continua through the fundamental laws of physics with an amended form of energy function. This amended energy function successfully resolves the physical interpretation of the Maxwell stress tensor under large deformations. Next, we develop the EME coupling type of universal relations through a new inequality [equation] for a class of an EME material parallel to an equation [equation] for an isotropic elastic material existing in the literature. Wherein, T and b denote the total Cauchy stress tensor and left Cauchy-Green deformation tensor, respectively. Further, we propose the possible forms of EME deformation families in smart materials for some standard experimental arrangements. At last, we also apply the above findings to a magnetostriction phenomenon in order to check the practical feasibility of the same and a good agreement is achieved successfully
Flip Learning experiments. An introductory course in A.I
No full textActive learning with Flip learning techniques are described in an active learning course in introductory A.I , taught at IIT Madras Computer Sciences Department, by the author in collaboration with Dr Deepak Khemani. In a methodology of flip learning and inverting the classroom, a system of surprise quizzes as more than an assessment, but a self exploratory flip learning pedagogy, with open ended deadlines.
The author describes a flip learning methodology, with preparatory reading and future reading summaries, as part of an open evaluation as part of the course instruction, combined with lectures, eliminating examinations, quizzes and traditional assessment techniques.
As a novel approach, the grading is modified to award original contributions, more than a good understanding of the subject matter, with a viva voce for a grading poorer than a B, inspired by Prof Josua Chover of UW Madison.
This active learning methodology builds on the methods practiced by Prof V Balakrishnan of the Physics department, IIT Madras, Prof Deepak Khemani of Computer Sciences , IIT Madras and Prof Joshua Chover of the Mathematics Department, UW Madison.
Keywords: Active Learning, Flip Learning, Undergrad instruction, Creative thinking, critical thinkin
In-Vitro Anticoagulant Study of Leaf Extract of Couropita Guianensis
No full textAnticoagulant activity of different extract of cannon ball tree was evaluated in-vitro. Medicinal plant acts as a metabolic bio factory, which can be accessed as therapeutic potential with lesser side effects. The phyto constituents of various medicinal plants can be correlated with pharmacological study. In vitro study was carried out with a vision to setup standards that could be beneficial for detecting authenticity of this medicinal plant. Numerical standards reported in this work could be useful for the compilation of suitable monograph of Couropita guianensis. Various phyto constituents such as alkaloids, tannins, saponnins and glycosides are producing a better opportunity for testing various pharmacological activities. The results obtained from this research revealed that that the plant contains bioactive agents which are connected with anticoagulant activity in plants
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