Baryon Interactions in Nuclear and Hypernuclear Matter

The production and structure of Λ hypernuclei are investigated in field theoretical models. The production in coherent p+A reactions is investigated by means of a resonance model. Results of exploratory calculations for associated strangeness production are presented for proton reactions on 40Ca. The target single particle wave functions are obtained from DDRH theory with density dependent Dirac-Brueckner meson-baryon vertices. The dependence of the in-medium vertices on density is discussed.Comment: 5 pages, 2 figs, proceedings for 'HADRON SPECTROSCOPY, Tenth International Conference on Hadron Spectroscopy, Aschaffenburg, Germany 2003'. to be published in the AIP series of conference proceeding

Testing Static Trade-off Against Pecking Order Models of Capital Structure

This paper tests traditional capital structure models against the alternative of a pecking order model of corporate financing. The basic pecking order model, which predicts external debt financing driven by the internal financial deficit, has much greater explanatory power than a static trade-off model which predicts that each firm adjusts toward an optimal debt ratio. We show that the power of some usual tests of the trade-off model is virtually nil. We question whether the available empirical evidence supports the notion of an optimal debt ratio.

Anisotropic generalization of well-known solutions describing relativistic self-gravitating fluid systems: An algorithm

We present an algorithm to generalize a plethora of well-known solutions to Einstein field equations describing spherically symmetric relativistic fluid spheres by relaxing the pressure isotropy condition on the system. By suitably fixing the model parameters in our formulation, we generate closed-form solutions which may be treated as anisotropic generalization of a large class of solutions describing isotropic fluid spheres. From the resultant solutions, a particular solution is taken up to show its physical acceptability. Making use of the current estimate of mass and radius of a known pulsar, the effects of anisotropic stress on the gross physical behaviour of a relativistic compact star is also highlighted.Comment: To appear in Eur. Phys. J.

E1−E2E1-E2 interference in the Coulomb dissociation of 8^8B

We investigate the effects arising out of the $E1 - E2$ interference in the Coulomb dissociation of $^8$B at beam energies below and around 50 MeV/nucleon. The theory has been formulated within a first order semiclassical scheme of Coulomb excitation, in which both the ground state and the continuum state wave functions of $^8$B enter as inputs. We find that the magnitude of the interference could be large in some cases. However, there are some specific observables which are free from the effects of the $E1 - E2$ interference, which is independent of the models used to describe the structure of $^8$B. This will be useful for the analysis of the breakup data in relation to the extraction of the astrophysical factor $S_{17}(0)$.Comment: Revised version to appear in Physical Review

Backyard lobster fattening unit Economic feasibility analysis

Lobsters form an important fishery all along the coastline of India. The lobster resource potential of Indian EEZ is 50,000 mt (Vijayakumaran and Radhakrishnan, 2000). Against this, lobster production of India in the year 20.00 was 2,387 t, consisting of spiny lobsters, sand lobsters, and deep-sea lobsters. While lobster fishery occurs round the year along the Indian coast and its island territories , th ere are peak seasons depending on the hydrographic conditions and natural fishery dist ribution of the regions concerned

Effect of multimodal interventions on pain and activities of daily living among the elderly with osteoarthritis

The aim of the present study was to assess the effect of multimodal interventions on pain and activities of daily living among the elderly with         knee osteoarthritis attending Physical Medicine and Rehabilitation OPD at General Hospital Alappuzha,Kerala. Objectives were to assess the level of joint pain in elderly with knee osteoarthritis, to assess the ability of elderly to perform activities of daily living, to evaluate the effect of multimodal interventions on pain and activities of daily living of elderly with knee osteoarthritis and to find out association between multimodal interventions and analgesic usage. The investigator adopted quantitative experimental approach for the study and research design was quasi experimental non equivalent control group design. The sample size was 74 elderly patients diagnosed as knee osteoarthritis selected using purposive sampling technique. A structured interview schedule was used to assess the socio personal and clinical data; pain and activities of daily living were assessed by numerical pain rating scale and Katz index respectively. Routine care was given to control group, while the experimental group underwent multimodal interventions which included educational session, isometric exercises and moist heat application for three weeks along with routine care. After three weeks, post-test was done in both groups. The findings revealed that there was a significant reduction in pain (P<0.001), improvement in activities of daily living (P<0.001) and also reduction in frequency of analgesic intake (p< 0.001) among elderly with knee osteoarthritis

Pd-catalyzed enantioselective aerobic oxidation of secondary alcohols: Applications to the total synthesis of alkaloids

Enantioselective syntheses of the alkaloids (-)-aurantioclavine, (+)-amurensinine, (-)-lobeline, and (-)- and (+)-sedamine are described. The syntheses demonstrate the effectiveness of the Pd-catalyzed asymmetric oxidation of secondary alcohols in diverse contexts and the ability of this methodology to set the absolute configuration of multiple stereocenters in a single operation. The utility of an aryne C-C insertion reaction in accessing complex polycyclic frameworks is also described

Elucidating the structural composition of a Fe-N-C catalyst by nuclear and electron resonance techniques

Fe–N–C catalysts are very promising materials for fuel cells and metal–air batteries. This work gives fundamental insights into the structural composition of an Fe–N–C catalyst and highlights the importance of an in‐depth characterization. By nuclear‐ and electron‐resonance techniques, we are able to show that even after mild pyrolysis and acid leaching, the catalyst contains considerable fractions of α‐iron and, surprisingly, iron oxide. Our work makes it questionable to what extent FeN4 sites can be present in Fe–N–C catalysts prepared by pyrolysis at 900 °C and above. The simulation of the iron partial density of phonon states enables the identification of three FeN4 species in our catalyst, one of them comprising a sixfold coordination with end‐on bonded oxygen as one of the axial ligands