Processing of Bioceramic Implants Via Fused Deposition Process

Porous ceramic structures have long been a subject of investigation as bone sl..bstitute. Most of these porous structures are typically made by techniques that result .randomly arranged pores with a wide variety of pore sizes. In recent years, SFF methods are being used for the fabrication of porous bioceramic implants. Porous ceramic structures have been fabricated using indirect route where a .polymeric mold is fitst created via fused deposition process. The mold was then infiltrated with ceramic slurry, dried. and ·then subjected to a binder bum out and sintering cycle. In this paper, processing of 3D honeycomb porous alumina ceramic structures and some.initial mechanical properties for bone implants will be discussed.Mechanical Engineerin

Novel Ceramics and Metal-Ceramic Composites via Fused Deposition Process

Indirect fused·· deposition process is utilized.·.. to ·fabricate controlled porosity ceramic structures using alumina, mullite, zirconia, LSCF-perovskite, tricalcium phosphate and hydroxyapatite, where pore size, pore shape and pore connectivity are varied from one end to the other end of the parts. Some of these porous ceramics are then infiltrated with metals via pressureless reactive metal infiltration to form novel metal-ceramic composites. Thispaper will describe processing, structures of various porous and metal-infiltrated composites and their physical and mechanical properties.Mechanical Engineerin

Modification of Cooper’s 12-min Run Test to Predict Maximum Oxygen Uptake in Indian Cricketers

Cooper’s 12-minute run test (CRT) for prediction of maximum oxygen uptake (VO2max) has not yet been explored in Indian sportspersons. Present investigation was conducted to evaluate the applicability of CRT in Indian cricketers. 75 male and 45 female cricket players were randomly recruited from reputed cricket academies of Kolkata, India and were randomly assigned into the study group (male = 45, female = 25) and confirmatory group (male = 30, female = 20). Incremental cycle ergometer exercise was used for direct estimation of VO2max by expired gas analysis and the indirect prediction of VO2max (PVO2max) was performed by CRT method. The current protocol of CRT was found to be inapplicable in both the genders of Cricketers due to a significant difference between PVO2max and VO2max and a large limit of agreement between PVO2max and VO2max in the study groups. A significant correlation (r = 0.76 in males and r = 0.79 in females, p<0.001) was depicted between VO2max and distance covered in CRT. Regression equations were computed based on the significant correlation. The application of these equations in the confirmatory groups revealed an insignificant difference between PVO2max and VO2max and narrow limits of agreement. Standard errors of the estimate of the regression norms were also minimal. Therefore, modified equations are recommended for CRT application for valid and precise evaluation of cardiorespiratory fitness in terms of VO2max in male and female Indian cricketers

Single spin Toffoli-Fredkin logic gate

The Toffoli–Fredkin (TF) gate is a universal reversible logic gate capable of performing logic operations without dissipating energy. Here, we show that a linear array of three quantum dots, each hosting a single electron, can realize the TF gate, if we encode logic bits in the spin polarization of the electrons and allow nearest neighbor exchange coupling. The dynamics of the TF gate is realized by selectively driving spin resonances in the coupled spin system with an acmagnetic field. The conditions for gate operation are established, and an estimate of the switching speed and gate error are provided

SCIENTOMETRIC DIMENSIONS OF RESEARCH PRODUCTIVITY OF THE BOTANY DEPARTMENT, DURING 1960-2000.

Bibliometric analysis for 160 theses and 739 thesis articles collected from the Botany Department at The University of Burdwan in eight subdivisions of Botany during 1960-2000 has been carried out to determine year wise productivity, authorship pattern and collaboration. The study has identified that the highest number of thesis submission was 40 during 1981-1985 and the highest number of article submission was 189 during 1976-1980. The highest 22 number of theses were guided by Balen Nandi. Authorship trend is towards multiauthored papers. The Degree of Collaboration is 0.70. The most prolific author was M.A Choudhuri who topped the list with 54 papers during the period 1960-2000 followed by A Mukherjee with 48 publications, P.S Basu with 31 publications, K Gupta with 30 publications and B Nandi, with 27 publications. Among the top ranking journals publishing the papers are from India with 373 (50.47 %) publications followed by Germany with 61(8.29 %) publications, China with 53(7.17 %) publications and Netherlands with 45(6.09 %) publications