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Journal of Scientific & Industrial Research

 

 

 

ISSN: 0022-4456

CODEN: JSIRAC (64) (5)  (2005)

VOLUME 64

NUMBER 5

MAY  2005

 

CONTENTS

 

Review Papers

323

Subsidence control measures in coalmines: A review

This paper reviews subsidence control approaches adopted in underground coalmines. Subsidence, a sudden depression of the ground, occurs in two forms, trough and pothole subsidence. This can be hazardous to life and property as it occurs without any prior indication. Subsidence can be controlled by using partial extraction methods, stowing etc. in working mines. Backfilling and Grouting can be used to stabilize unapproachable abandoned underground mines.

IPC Code: E 21 C 45/00

 

 

 

 

 

 

 

R D Lokhande, A Prakash, K B Singh & K K K Singh

 

333

Performance and emissions of natural gas fueled internal combustion engine: A review

 

Kirti Bhandari, Akhil Bansal,
Anuradha Shukla & Mukesh Khare

Natural gas has emerged as a solution to depleting crude oil resources as well as to the deteriorating urban air quality problem. Air-fuel ratio, operating cylinder pressure, fuel injection, and compression ratio are some of the parameters that need to be analyzed and optimally exploited for better engine performance and reduced emissions. In this study, a comprehensive review of various operating parameters and concerns has been prepared.

 

IPC Code: C 10 L 1/08

Papers

339

Internet diffusion in India and China - Who holds the edge

Study highlights the importance of the Internet access in the context of India and China, which together are home to approx 40% of world’s population. China holds the clear edge over India in terms of number of Internet users and Internet hosts; India is better rated when it comes to e-readiness. Internet is still out of reach of rural population in both the countries and both need to have low cost local language based computing devices for the use of rural population to access Internet.

 

 

 

 

 

 

Yogesh Suman & V P Kharbanda

 

347

GA applications to RSM based models for burr size reduction in drilling

 

 

V N Gaitonde, S R Karnik, B T Achyutha & B Siddeswarappa

Application of Genetic Algorithm (GA) for reduction of burr size in drilling process, models using Response Surface Methodology (RSM) were presented. Second order mathematical models of burr height and burr thickness are developed using central composite rotatable design of experiments for drilling of mild steel work pieces. The developed RSM models are then employed with GA, which is a search algorithm based on natural selection, to minimize the burr size. The advantages of GA to obtain optimum process parameters in a multi-objective non-linear problem by proper design of fitness function involving burr size are demonstrated through simulation results.

354

Comparison of pipelined IEEE-754 standard floating point adder with unpipelined adder

This paper presents a comparison of pipelined floating-point adder complaint with IEEE 754 format with an unpipelined adder also complaint with IEEE 754 format. The functional partitioning of the adder into four distinct stages operates simultaneously for different serial input data stream. It not only increases the speed but also is energy efficient. The basic methodology and approach used for VHDL implementation of the floating-point adder are also described. Detailed synthesis report operated upon Xilinx ISE 5.2i software and Modelsim is given. The hardware design is implemented on Spartan IIE FPGA chip.

 

 

 

 

 

 

 

 

 

 

 

 

 

Kavita Khare, R P Singh & Nilay Khare

 

358

Geotechnical investigation for support design in depillaring panels in Indian coalmines

In Indian coalmines, CMRI- RMR and NGI-Q Systems are mostly used for formulating design of support in rock engineering. Roof support, which is an important aspect of ground control, involves maintaining roof competency to ensure a safe and efficient mining environment. This paper deals with a case study where CMRI- RMR and NGI Q- Systems are used for estimation of rock load for design of support in a coalmine in India in semi-mechanized depillaring workings with desired success.

IPC Code: E 21 C 41/18

 

 

 

 

 

 

 

 

 

Ajoy K Singh, A Sinha, A Paul &
K Saikia

 

364

Ring opening polymerization of ethylene carbonate with base as initiator

The study presents synthesis of industrially important polymer, polyethylene ether carbonate, via ring opening polymerization of ethylene carbonate using KOH as initiator at 200°C for 7 h. The molecular weight (1200-3400) and yield (40-80%) of the polymer were determined. The structure analysis using IR and NMR techniques showed the presence of carbonate and ether linkages in the polymer.

IPC Code: C 08 G 64/02

 

 

 

 

 

 

 

 

 

A G Patil, U R Kapadi & D G Hundiwale

 

367

Improvement in optical brightness of fly ash based zeolite-A for use as detergent builder

 

 

 

J S Udhoji, A K Bansiwal, S U Meshram & S S Rayalu

A process has been formulated for synthesis of fly ash-based Zeolite-A (FAZ-A), optical brightness (58.2%) of which is slightly less for use as detergent builder. Attempts have been made to improve the optical brightness (OB) of FAZ-A samples using pretreatment of fly ash (FA) through magnetic separation of iron, acid treatment and lime treatment to control colour development in zeolite sample. Treatment of FA and FAZ-A samples has also been attempted by EDTA chelation technique to control iron content. Treatment methodologies have been standardized for improvement in OB as a trade-off between CBC and iron content depending upon the end use of zeolite A.

IPC Code: B 29 D 11/00

372

Purification of phycobiliproteins from Nostoc muscorum

Purification of phycobiliproteins from phycoerythrin (PE) rich strain of Nostoc msucorum was carried out. Salting out with 55 % (NH4)2SO4 precipitates >80 % of each class of phycobiliprotein. Chromatography on DEAE cellulose-52 column gives pure PE (A562/A280 = 8.12), while rechromatography of the blue coloured fraction from this column using a hydroxy apatite column yields pure phycocyanin (PC) (A615/A280 = 3.89). SDS-PAGE analysis of purified PE and PC yields two polypeptides (~19.4 and 16.9 kDa). PE is found to be stable between pH 5-9. This protocol helps to get highly pure PE (72%) and PC (39%).

IPC Code: C 12 N 1/12

 

 

 

 

 

 

 

 

 

 

K Ranjitha & B D Kaushik

 

Report

376

Crop surveillance, disease forecasting and management - A report

J K Johri & S K Raj

Book Review

381

Industrial districts: A new approach to industrial change

Reviewer: Rajat K Baisya

Author-Reader Platform

382

Announcements

383

Instructions to contributors

 

Author Index

 

Achyutha B T 

 

Bansal Akhil

Bansiwal A K

Bhandari Kirti

 

Gaitonde V N

 

Hundiwale D G

 

Johri J K

 

Kapadi U R

Karnik S R

Kaushik B D

Kharbanda V P

Khare Kavita

Khare Mukesh

Khare Nilay

 

Lokhande R D

347

 

333

367

333

 

347

 

364

 

376

 

364

347

372

339

354

333

354

 

 323

 

Meshram S U

 

Patil A G

Paul A

Prakash A

 

Raj S K

Ranjitha K

Rayalu S S 

 

Saikia K

Shukla Anuradha

Siddeswarappa B

Singh Ajoy K

Singh K B

Singh K K K

Singh R P

Sinha A

Suman Yogesh

 

Udhoji J S

 

367

 

364

358

323

 

376

372

367

 

358

333

347

358

323

323

354

358

339

 

 367 

 

 

 

Keyword Index

 

Allophycocyanin

 

Bandwidth

Burr size

 

Central composite rotatable  design of experiments

China 

CMRI-RMR system

CNG

Coalmines

Compression ignition engines

 

Depillaring

Detergent builder

Drilling

Dual fuel engine

 

Emissions

E-readiness

Ethylene carbonate

 

372

 

339

347 

 

347

 

 

339

358

333

323,358

333 

 

 

358

367

347

333

 

333

339

364  

Floating point adder

Fly ash

 

Genetic algorithm

Grouting

 

IEEE floating point standard

India

Internet

 

Latency

 

Model-Sim

 

NGI-Q system 

Nostoc muscorum

 

Optical brightness

 

354

367

 

347

323

 

354

339

339

 

354

 

354

 

358

372

 

367

Partial extraction

Phycobiliproteins

Phycocyanin

Phycoerythrin

Pipelining

Polycarbonate

 

Response surface methodology 

Ring opening polymerization

Rock engineering

 

Spark ignition engines

Stowing

Subsidence

 

VHDL

 

Xilinx ISE 5.2i 

 

Zeolite-A 

 

323

372 

372

372

354

364 

 

347

 

364

358

 

333

323

323

 

354

 

354

 

367