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Coal-sand attrition system and its importance in fine coal cleaning
The primary objective of this project is geared toward the substitution of steel media by fracturing silica sand as a grinding media for ultrafine coal grinding. The experimental silica is as follows: (1) design and fabrication of attrition cell; (2) sample procurement, preparation, and characterization; (3) batch grinding tests; (4) continuous grinding test; and (5) fracture mechanics
Bilateral temporal spinous projections overshadowing the sphenoidal spines: an anatomical and radiological evaluation
The infratemporal fossa has traditionally been described as a post-maxillary
space, which is open below, to the rear and laterally. The most reliable osseous
landmarks of the infratemporal and parapharyngeal spaces are the pterygoid
and styloid processes and the sphenoidal spine. In the present study the skull
exhibited the normal sphenoidal spines along with a prominent spinous projection
emanating bilaterally from the tympanic plate of the temporal bone.
The objective of the present paper is to report an anatomical and radiological
evaluation of the sphenoidal spines coexistent with bilateral temporal spinous
projections. Additionally, the topographical relationship of this osseous variation
is discussed with particular reference to neurovascular structures. Unduly
prominent temporal spinous projections may cause obstruction, thus reducing
the operative field. The anatomical variations relating to bony and vascular
structures in this region are of paramount importance to neurosurgeons and
otorhinolaryngologists
A study on innovativeness and regulating conflicts between the fishers and farmers in the Balua wetland
Wetlands store ground and surface water even when the rainfall is erratic. However, the rising demand for water and land to sustain the ever increasing population has manifested in many kinds of conflicts in wetlands. In the study area, Balua Chaur (wetland) in Bihar state of India, 16 conflicts emerged when the flooded lands offarmers was accessed by the fishers to fish. Such conflicts had further marginalized the already indigent fishers. Factor analysis, to reduce the socioeconomic and psychological variables of the fishers that were associated with innovativeness and further analysis of ANOVA and regression was used. In case of fishers, two major groups of interrelated variables that accounted for 60.6 % of the total variance were identified through this method. Factor 1 accounted for 34.8 % of the total variance that included innovativeness, income, education, mass media exposure, extension contact, livestock ownership, land ownership, mobile use collaborating and competing style of conflict management and named as innovative factors. The ANOVA table and stepwise multiple regression model exhibited that the nuclear family type and livestock have significant impact on the innovativeness of fishers with R2 value 0.255. In this paper, peace and prosperity model based upon the analysis of primary information collected from the fishers, farmers and key informants is proposed to foster innovativeness to enhance the productivity of wetland and resolve conflict to mobilize the resources in efficient and judicial manner
The effects of grain shape and frustration in a granular column near jamming
We investigate the full phase diagram of a column of grains near jamming, as
a function of varying levels of frustration. Frustration is modelled by the
effect of two opposing fields on a grain, due respectively to grains above and
below it. The resulting four dynamical regimes (ballistic, logarithmic,
activated and glassy) are characterised by means of the jamming time of
zero-temperature dynamics, and of the statistics of attractors reached by the
latter. Shape effects are most pronounced in the cases of strong and weak
frustration, and essentially disappear around a mean-field point.Comment: 17 pages, 19 figure
Applications of the Collective Field Theory for the Calogero-Sutherland Model
We use the collective field theory known for the Calogero-Sutherland model to
study a variety of low-energy properties. These include the ground state energy
in a confining potential upto the two leading orders in the particle number,
the dispersion relation of sound modes with a comparison to the two leading
terms in the low temperature specific heat, large amplitude waves, and single
soliton solutions. The two-point correlation function derived from the
dispersion relation of the sound mode only gives its nonoscillatory asymptotic
behavior correctly, demonstrating that the theory is applicable only for the
low-energy and long wavelength excitations of the system.Comment: LaTeX, 31 page
Bose-Einstein condensation in multilayers
The critical BEC temperature of a non interacting boson gas in a
layered structure like those of cuprate superconductors is shown to have a
minimum , at a characteristic separation between planes . It is
shown that for , increases monotonically back up to the ideal
Bose gas suggesting that a reduction in the separation between planes,
as happens when one increases the pressure in a cuprate, leads to an increase
in the critical temperature. For finite plane separation and penetrability the
specific heat as a function of temperature shows two novel crests connected by
a ridge in addition to the well-known BEC peak at associated with the
3D behavior of the gas. For completely impenetrable planes the model reduces to
many disconnected infinite slabs for which just one hump survives becoming a
peak only when the slab widths are infinite.Comment: Four pages, four figure
Dietary Pattern of Schoolgoing Adolescents in Urban Baroda, India
Diet plays a very important role in growth and development of
adolescents, during which the development of healthy eating habits is
of supreme importance. There is a dual burden of undernutrition and
overnutrition in this age-group. The study assessed the food habits,
food preferences, and dietary pattern of schoolgoing urban adolescents
in Baroda, India. Both quantitative and qualitative methods were used
in this study. A quantitative survey was carried out using a pre-tested
self-administered structured questionnaire among 1,440 students from
class 6 to 12 in 7 English medium and 23 Gujarati medium schools. Focus
group discussions, 5 each with adolescent boys and girls, were held,
along with 5 focus group discussions with teachers of Gujarati and
English medium schools. Nearly 80% of adolescents had consumed regular
food, like dal, rice, chapati, and vegetables, including green leafy
vegetables. Nearly 50% of them had consumed chocolates, and about
one-third consumed fast foods. Nearly 60% of adolescents had their
breakfast daily while the remaining missed taking breakfast daily.
Nearly one-third of adolescents were missing a meal once or twice a
week. A large majority had consumed regular foods. However, more than
half of them had consumed chocolates, soft drinks, and over one-third
had taken fast foods
S-duality, 't Hooft operators and the operator product expansion
We study S-duality in N=4 super Yang-Mills with an arbitrary gauge group by
determining the operator product expansion of the circular BPS Wilson and 't
Hooft loop operators. The coefficients in the expansion of an 't Hooft loop
operator for chiral primary operators and the stress-energy tensor are
calculated in perturbation theory using the quantum path-integral definition of
the 't Hooft operator recently proposed. The corresponding operator product
coefficients for the dual Wilson loop operator are determined in the strong
coupling expansion. The results for the 't Hooft operator in the weak coupling
expansion exactly reproduce those for the dual Wilson loop operator in the
strong coupling expansion, thereby demonstrating the quantitative prediction of
S-duality for these observables.Comment: 33 pages; v2: references adde
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