[en] Four neutron Schroedinger wave interference experiments are described: (A) Null Fizeau Effect for Thermal Neutrons in Moving Matter; (B) Precision Measurements of the Energy Dependent Scattering Length of ²³⁵U; (C) Gravitationally Induced Quantum Interference Experiment; and (D) Investigation of Incident-Beam Coherence Questions in Dynamical Diffraction Experiments. In the Fizeau Effect experiment is was verified that a neutron de Broglie wave is not affected by the state of motion of matter within fixed boundaries through which the neutron is propagating. Using neutron interferometric techniques, the energy dependent bound coherent scatting length of ²³⁵U was directly measured in the energy range of 30 meV to 92 with an error limit of 0.3%. Experimental data are in very good agreement with the theoretical values obtained from Breit-Wigner formalism. In the second generation Gravity Induced Quantum Interference Experiments (COW), results showed that the observed loss of contrast of the interference pattern is caused in part by the bending of the perfect crystal neutron interferometer. Lastly, mathematical and numerical calculation techniques are presented to investigate the effect of wavefront modulation and transverse coherence of an incident neutron beam in dynamical diffraction experiments. Experimental and theoretical pendelloesung interference patterns for dynamical neutron diffraction in perfect silicon crystal were obtained and compared

[en] The effects of cavity detuning and damping on the predictions of the one-photon Jaynes Cummings model about the atomic population inversion and the second-order coherence function are computed. For the cases where both detuning and damping are present two alternative approximation schemes based on second-order perturbation theory are developed and numerically analyzed. For the case where damping is absent but detuning present, an exact solution of the density matrix is worked out and a numerical study of the dynamical quantities of interest carried out. These three approaches used are compared with each another. (author)

[en] Using a LLL type neutron interferometer at the University of Missouri Research Reactor the author have begun measuring the energy dependent bound coherent scattering length of ²³⁵U in the incident neutron energy range of 25 meV to 125 meV. So far the authors have taken measurements at 41 meV, 50 meV and 75 meV incident neutron energies. Two sample foils of 0.5 mm and 0.6 mm thicknesses with 93.5% ²³⁵U isotopic purity were used. Within experimental uncertainties, the independent measurements from the two samples, corrected for composition and density, give identical values for the scattering length at these energies. The error in their measured values is about 4 parts in 1000, which is about one order smaller than the presently accepted value at comparable energy. Comparison of their results with those obtained from single level Breit Wigner formalism gives satisfactory agreement. Their future aim is to extend these measurements to higher energies at a pulsed neutron source

[en] A Reply to the Comment by C. A. Chatzidimitriou-Dreismann et al. (c) 2000 The American Physical Society

[en] A field experiment was conducted to evaluate the effect of different plant densities on growth and yield of white mustard during Rabi 2008-09 under rain fed conditions. Three plant spacing (5, 10 and 15 cm) and three row spacing (10, 20 and 30 cm) were applied during the course of study. Results indicated that plant density has significant effects on growth, seed yield and oil contents of white mustard. Number of pods per plant (2002), number of seeds per pod (4.67), 1000 seed weight (5.02 g), oil contents (32.21 %) and fatty acids except linoleic acid significantly increased by increasing plant spacing due to less competition among plants for moisture, light and nutrients. The maximum plant height (148.9 cm) was with 10 X 20 cm/sup -1/ spacing. Maximum seed yield (2046 kg ha) was recorded for row spacing 15 cm where plants were spaced 10 cm within rows. At higher plant density, the overall seed yield of white mustard increased with increasing number of pods per plant. Thus, it is concluded that white mustard should be grown at 150 cm grids for higher yield output. (author)

[en] Full text: An accurate measurement off the n-e scattering length (a_ne) and assessment of the reliability of the existing measurements have been of considerable interest in recent years. The existing measured values are clustered in two groups that differ almost by 20%. This discrepancy has resulted in difficulty to determine the sign of the intrinsic mean squared charge radius value of the neutron that reveals information about the internal charge structure of the electrically neutral neutron. A neutron interferometric measurement of a_ne using diffraction of neutrons from perfect crystal Si and Ge inside interferometer is now in progress at the Neutron Interferometer and Optics Facility (NIOF) at the NIST. Preliminary results from this experiment and the theoretical background will be presented. Copyright (1999) Australian Optical Society

[en] Grain size and weight determine crop yield in cereals, whereas in rice grain size and shape is major attribute to identify market value and also used for classifying rice genotypes. Rice germplasm collection and knowledge of genetic diversity are required for variety improvement. Molecular markers provide powerful tool for identification of genetic variation and mapping of gene/ QTLs. There are a lot of gene/QTLs were identified by different groups on chromosome 3 and 7 controlling grain length. Clustering based on grain length divided the 48 accessions into two major clusters with some contradiction. Genetic relationships among the 48 rice accessions were determined based on allelic diversity using Power Marker tree, structure analyses and PCA using 51 SSR markers located on chromosome 3 and chromosome 7. Two-dimensional PCA scaling and power marker tree analysis showed high-level of differentiation between Basmati and indica rice accessions and divide these rice accessions in two distinct clusters. (author)

[en] It is predicted that, at some sufficiently high level of sensitivity, two streaks intersecting at the Bragg point and symmetrically situated about the reciprocal-lattice vector G should always be observable in a diffraction experiment. (orig.)

[en] A low alloy steel containing 0.2% C was heat treated with three cycles of heat treatments with the aim to acquire different morphologies of martensite in dual phase microstructure. Microscopic examination revealed that the morphologies consisting of grain boundary growth, scattered laths and bulk form of martensite were obtained. These morphologies have their distinct patterns of distribution in the matrix (ferrite). In tensile properties observations the dual phase steel with bulk morphology of martensite showed minimum of ductility but high tensile strength as compared to other two morphologies. This may be due to poor alignments of bulk martensite particles along tensile axes during deformation. Tempering was employed with various holding times at 550 deg. C to induce ductility in the heat treated material. The tempering progressively increased the ductility by increasing holding time. However, tempering response to strengths and ductilities was different to all three morphologies of martensite. (author)

[en] We report the results of an experiment which observed the 4π-symmetry of the neutron wave function under space rotation by the use of a slowly rotating magnetic field which trapped the precessing neutron spin and turned it in space