Synthesis, Thermal Studies and Spectral Characterization of Co(II), Ni(II), Cu(II), and Zn(II) Complexes with Some Polymeric Diacetyl Acyldihydrazone Ligands

Vinod Prasad Singh,Divya Pratap Singh 한국고분자학회 2013 Macromolecular Research Vol.21 No.7

Two polymeric ligands, diacetyl oxaloyldihydrazone (DODH), diacetyl malonoylhydrazone (DMDH)and their Co(II), Ni(II), Cu(II) and Zn(II) complexes were synthesized and characterized by elemental analyses, IR,mass, 1H & 13C NMR, ESR and electronic spectral studies. The ligands and their complexes are highly insoluble in water and common organic solvents and decompose at high temperature. The metal atoms are embedded between two polymeric chains of the organic ligands and the monomeric unit of the polymeric chain behaves as a neutral bidentate ligand and coordinate through two >C=N groups to different metals as indicated by 1H & 13C NMR and IR spectral studies. The molecular weights determined by 1H NMR and mass spectral studies suggest oligomeric nature of the ligands and their Zn(II) complexes. The magnetic susceptibility measurements and electronic spectral studies indicate a square planar geometry around the metal ion in Co(II) and Ni(II) complexes. Electronic and ESR spectral studies for Cu(II) complexes suggest a distorted octahedral stereochemistry around the metal atom and 2B1g as the ground state. Thermal studies (TGA and DTA) of some of the complexes in inert atmosphere show a multi-step exothermic decomposition of the bonded organic ligand at high temperature and metal (II) chloride as the end product.

PHOTON-ASSISTED INTERSUBBAND TRANSITIONS IN A QUANTUM WIRE

VINOD PRASAD,PRADEEP KUMAR JHA,MAN MOHAN,MONICA GUDWANI 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2006 NANO Vol.1 No.3

We investigate the response of electrons confined in a quantum wire in the presence of intense terahertz (THz) electric field. An exact and powerful nonperturbative fundamental approach of Floquet theory is employed to solve the equation of motion for resonantly driven intersubband transitions. Several interesting features namely dynamic Stark shift, power broadening and hole-burning are observed with the variation in electric field strength. In addition, the degeneracy between several excited states is found to be removed in the presence of high electric field.

Area-Power Trade-Offs for Flexible Filtering in Green Radios

Michael, Navin,Moy, Christophe,Vinod, Achutavarrier Prasad,Palicot, Jacques The Korea Institute of Information and Commucation 2010 Journal of communications and networks Vol.12 No.2

The energy efficiency of wireless infrastructure and terminals has been drawing renewed attention of late, due to their significant environmental cost. Emerging green communication paradigms such as cognitive radios, are also imposing the additional requirement of flexibility. This dual requirement of energy efficiency and flexibility poses new design challenges for implementing radio functional blocks. This paper focuses on the area vs. power trade-offs for the type of channel filters that are required in the digital frontend of a flexible, energy-efficient radio. In traditional CMOS circuits, increased area was traded for reduced dynamic power consumption. With leakage power emerging as the dominant mode of power consumption in nanoscale CMOS, these trade-offs must be revisited due to the strong correlation between area and leakage power. The current work discusses how the increased timing slacks obtained by increasing the parallelism can be exploited for overall power reduction even in nanoscale circuits. In this context the paper introduces the notion of 'area efficiency' and a metric for evaluating it. The proposed metric has also been used to compare the area efficiencies of different classes of time-shared filters.

Anomalous Stark effect and optical properties of exciton in a quantum dot with linear potential under ionized donor hydrogenic impurity

Varsha,Arora Monika,Gambhir Monica,Prasad Vinod 한국물리학회 2023 Current Applied Physics Vol.48 No.-

Wannier-Mott (W-M) exciton is studied under the confinement of linear potential in a Spherical Quantum Dot (QD) with ionized donor hydrogenic impurity (IDHI). Using electric field excitonic transitions have been used to explore the optical properties of the above-said system. Time independent Schrödinger equation is solved numerically using effective mass approximation. The response of Absorption Coefficients (ACs) as a function of excitonic transition, electric field, and intensity of the laser field is investigated. Optical properties get drastically modified under confinement. The effect of IDHI is also studied in ACs for exciton in linear potential under spherical QD for the first time.

Area-Power Trade-Offs for Flexible Filtering in Green Radios

Navin Michael,Christophe Moy,Achutavarrier Prasad Vinod,Jacques Palicot 한국통신학회 2010 Journal of communications and networks Vol.12 No.2

The energy efficiency of wireless infrastructure and terminals has been drawing renewed attention of late, due to their significant environmental cost. Emerging green communication paradigms such as cognitive radios, are also imposing the additional requirement of flexibility. This dual requirement of energy efficiency and flexibility poses new design challenges for implementing radio functional blocks. This paper focuses on the area vs. power trade-offs for the type of channel filters that are required in the digital frontend of a flexible, energy-efficient radio. In traditional CMOS circuits, increased area was traded for reduced dynamic power consumption. With leakage power emerging as the dominant mode of power consumption in nanoscale CMOS, these trade-offs must be revisited due to the strong correlation between area and leakage power. The current work discusses how the increased timing slacks obtained by increasing the parallelism can be exploited for overall power reduction even in nanoscale circuits. In this context the paper introduces the notion of ‘area efficiency’ and a metric for evaluating it. The proposed metric has also been used to compare the area efficiencies of different classes of time-shared filters.

Acquiring Business Intelligence through Temporal Mining of Smart Meter Data

Siva Koteswara Rao Chinnam,AV Krishna Prasad,B.Premamayudu,Moka Vinod,Hye-Jin Kim 보안공학연구지원센터 2016 International Journal of Software Engineering and Vol.10 No.9

More and more enterprises are switching over to Machine learning applications to improve their analyzing and predicting capabilities of their business. In this paper we propose a new outlook towards utility computing where public services can be view as a business. A public service can be better delivered by viewing it as a business model rather than a service model. The demand supply can be better analyzed and predicted by our model. This paper is about using efficient mining techniques on real time smart meter data for any utility like water, power or gas etc. The parameters that smart meters provide from time to time over a network can give us real time readings of the consumption which in itself adds enough intelligence to the service. Now by applying temporal mining techniques on this smart meter data we attempt to show how the Business intelligence can be improved by data analysis and analytics. Though there is an opposition from some point of views that smart meters are hazardous to health due to its RF technology we can only improve utility computing by smarter data so that the service in efficient and effective.

Biological and Medicinal Properties of Grapes and Their Bioactive Constituents: An Update

Mukesh Yadav,Shalini Jain,Aarti Bhardwaj,Ravinder Nagpal,Monica Puniya,Radha Tomar,Vinod Singh,Om Parkash,G.B.K.S. Prasad,Francesco Marotta,Hariom Yadav 한국식품영양과학회 2009 Journal of medicinal food Vol.12 No.3

The grape is one of the most valued conventional fruits, worldwide. Although most of the parts of the grapevine are useful, primarily, the grape is considered as a source of unique natural products not only for the development of valuable medicines against a number of diseases, but also for manufacturing various industrial products. Over the last few decades, apart from the chemistry of grape compounds, considerable progress has been made towards exploring the biological activities of various grape-derived constituents. Today, it is well established that in addition to serving as food, the grape is a major source of several phytochemicals. The main biologically active and well-characterized constituent from the grape is resveratrol, which is known for various medicinal properties in human diseases. This review discusses the roles of various grape-derived phytochemicals in relation to various diseases.

Biological and Medicinal Properties of Grapes and Their Bioactive Constituents: An Update

Yadav, Mukesh,Jain, Shalini,Bhardwaj, Aarti,Nagpal, Ravinder,Puniya, Monica,Tomar, Radha,Singh, Vinod,Parkash, Om,Prasad, G.B.K.S.,Marotta, Francesco,Yadav, Hariom The Korean Society of Food Science and Nutrition 2009 Journal of medicinal food Vol.12 No.3

The grape is one of the most valued conventional fruits, worldwide. Although most of the parts of the grapevine are useful, primarily, the grape is considered as a source of unique natural products not only for the development of valuable medicines against a number of diseases, but also for manufacturing various industrial products. Over the last few decades, apart from the chemistry of grape compounds, considerable progress has been made towards exploring the biological activities of various grape-derived constituents. Today, it is well established that in addition to serving as food, the grape is a major source of several phytochemicals. The main biologically active and well-characterized constituent from the grape is resveratrol, which is known for various medicinal properties in human diseases. This review discusses the roles of various grape-derived phytochemicals in relation to various diseases.