Multi-parameter approach to R-parity violating SUSY couplings

We introduce and implement a new, extended approach to placing bounds on trilinear R-parity violating couplings. We focus on a limited set of leptonic and semi-leptonic processes involving neutrinos, combining multidimensional plotting and cross-checking constraints from different experiments. This allows us to explore new regions of parameter space and to relax a number of bounds given in the literature. We look for qualitatively different results compared to those obtained previously using the assumption that a single coupling dominates the R-parity violating contributions to a process (SCD). By combining results from several experiments, we identify regions in parameter space where two or more parameters approach their maximally allowed values. In the same vein, we show a circumstance where consistency between independent bounds on the same combinations of trilinear coupling parameters implies mass constraints among slepton or squark masses. Though our new bounds are in most cases weaker than the SCD bounds, the largest deviations we find on individual parameters are factors of two, thus indicating that a conservative, order of magnitude bound on an individual coupling is reliably estimated by making the SCD assumption.Comment: 30 pages, 8 figures, 2 tables. Typos fixed, two references added and references updated. Eq. (41) removed, Eq. (40) and text modified. Published versio

Desain Tungku Biomassa pada Sistem Pengering Erk-Hibrid untuk Pengeringan Benih Jarak Pagar

This research was designing a unit of biomass stove which was rising heat used on greenhouse effect dryer system. The heat of drying system then utilized to dry seed with a certain Celsius degree; average of 40 oC and constantly due to effect of temperature controller. The result of the designed system indicated that level of castor oil plant drying temperature was 38 - 41 oC. The stove\u27s efficiency to the heat exchanger had 74.0 % and the efficiency of heat exchanger to the drying system had 57,3 %. The viability testing of castor oil plant seed which had been drying yield 90 % growing showed the ability to reduce dormant. Another treatment of the seed to remain into water for 6 hours before planted is not suggested

Electron Correlation and the c-axis Dispersion of Cu d_z^2: a New Band Structure for High Temperature Superconductors

Previously we showed the major effect of electron correlation in the cuprate superconductors is to lower the energy of the Cu d_x^2-y^2/O p_sigma (x^2-y^2) band with respect to the Cu d_z^2/O' p_z (z^2) band. In our 2D Hubbard model for La_1.85Sr_0.15CuO_4 (LaSCO), the z^2 band is narrow and crosses the standard x^2-y^2 band just below the Fermi level. In this work, we introduce c-axis dispersion to the model and find the z^2 band to have considerable anisotropic 3D character. An additional hole-like surface opens up in the z^2 band at (0,0,2pi/c) which expands with doping. At sufficient doping levels, a symmetry allowed x^2-y^2/z^2 band crossing along the (0,0)-(pi,pi) direction of the Brillouin zone appears at the Fermi level. At this point, Cooper pairs between the two bands (e.g. (k uparrow x^2-y^2/k downarrow z^2)) can form, providing the basis for the Interband Pairing Theory of superconductivity in these materials.Comment: submitted to Phys. Rev. Lett. Related publications: Phys. Rev. B 58, 12303 (1998); Phys. Rev. B 58, 12323 (1998); cond-mat/9903088; cond-mat/990310

Parameter Estimation In X-ray Astronomy Revisited

The method of obtaining confidence intervals on a subset of the total number of parameters (p) of a model used for fitting X-ray spectra is to perturb the best-fitting model until, for each parameter, a range is found for which the change in the fit statistic is equal to some critical value. This critical value corresponds to the desired confidence level and is obtained from the chi-square distribution for q degrees of freedom, where q is the number of interesting parameters. With the advent of better energy-resolution detectors, such as those onboard ASCA it has become more common to fit complex models with narrow features, comparable to the instrumental energy resolution. To investigate whether this leads to significant non-Gaussian deviations between data and model, we use simulations based on ASCA data and we show that the method is still valid in such cases. We also investigate the weak-source limit as well as the case of obtaining upper limits on equivalents widths of weak emission lines and find that for all practical purposes the method gives the correct confidence ranges. However, upper limits on emission-line equivalent widths may be over-estimated in the extreme Poisson limit.Comment: 21 pages, 6 Figures. Latex with separate postscript figure files. Appears in ApJ. NOTE:replaces erroneous version sent out due to clerical erro

The NMR of High Temperature Superconductors without Anti-Ferromagnetic Spin Fluctuations

A microscopic theory for the NMR anomalies of the planar Cu and O sites in superconducting La_1.85Sr_0.15CuO_4 is presented that quantitatively explains the observations without the need to invoke anit-ferromagnetic spin fluctuations on the planar Cu sites and its significant discrepancy with the observed incommensurate neutron spin fluctuations. The theory is derived from the recently published ab-initio band structure calculations that correct LDA computations tendency to overestimate the self-coulomb repulsion for the half-filled Cu d_x2-y2 orbital for these ionic systems. The new band structure leads to two bands at the Fermi level with holes in the Cu d_z2 and apical O p_z orbitals in addition to the standard Cu d_x2-y2 and planar O p_sigma orbitals. This band structure is part of a new theory for the cuprates that explains a broad range of experiments and is based upon the formation of Cooper pairs comprised of a k up spin electron from one band and a -k down spin electron from another band (Interband Pairing Model).Comment: In Press, Journal of Physical Chemistry. See also http://www.firstprinciples.com. Minor changes to references and figure readabilit

The Effect of Apparatus Competence on Public Service Quality of Financial Agency in Gorontalo District

This research aim is to examine the effect of apparatus competence on public service quality of Financial Agency in Gorontalo District. It uses explanatory survey method with quantitative approach to analyze the effect of apparatus competence as independent latent construct (exogenous) on public service quality of financial agency as latent construct (endogen). The population of 100 respondents spread in offices of Gorontalo District Financial Agency and some Local Apparatus Work Unit (LAWU), and all population become samples. The data is analyzed by Partial Least Square (PLS) with SmartPLS. The research results show that the effect of apparatus competence on public service quality of financial agency has path coefficient of 0.521 (52.1%) with t value of 7.919. This value is greater than t table (1.96). Therefore, the apparatus competence has a direct positive and significant effect on Public Service Quality of financial agency in Gorontalo District. It can be said that apparatus competence increase the Public Service Quality of financial agency in Gorontalo District. Keywords: apparatus Competence, Public Service Quality

Peningkatan Aktivitas Belajar Siswa Menggunakan Media Kartu Bilangan pada Pembelajaran Matematika

The research do with class action research. The research is about to step on student activity learning with used card number media of Mathematics Learning in third grade Elementary School number 18 West Pontianak. This research meant to describe whether using card number media could be step on student activity learn of Mathematics Learning in third grade Elementary School number 18 West Pontianak. The method used is descriptive method. Procedure of class action research have four step that is Planning, Action, Observation and Reflection. The data collecting technique is direct observation and data collection tool was observation sheet. The research do by two cycle. One cycle have two meeting. The first cycle reach for average score of 66%. The second cycle reach for average score 88%. Thats proving an increase of 22%. Can be deduced by using the card number media increase the activity of third grade Elementary School number 18 West Pontianak

The Antiferromagnetic Band Structure of La2CuO4 Revisited

Using the Becke-3-LYP functional, we have performed band structure calculations on the high temperature superconductor parent compound, La2CuO4. Under the restricted spin formalism (rho(alpha) equal to rho(beta)), the R-B3LYP band structure agrees well with the standard LDA band structure. It is metallic with a single Cu x2-y2/O p(sigma) band crossing the Fermi level. Under the unrestricted spin formalism (rho(alpha) not equal to rho(beta)), the UB3LYP band structure has a spin polarized antiferromagnetic solution with a band gap of 2.0 eV, agreeing well with experiment. This state is 1.0 eV (per formula unit) lower than that calculated from the R-B3LYP. The apparent high energy of the spin restricted state is attributed to an overestimate of on-site Coulomb repulsion which is corrected in the unrestricted spin calculations. The stabilization of the total energy with spin polarization arises primarily from the stabilization of the x2-y2 band, such that the character of the eigenstates at the top of the valence band in the antiferromagnetic state becomes a strong mixture of Cu x2-y2/O p(sigma) and Cu z2/O' p(z). Since the Hohenberg-Kohn theorem requires the spin restricted and spin unrestricted calculations give exactly the same ground state energy and total density for the exact functionals, this large disparity in energy reflects the inadequacy of current functionals for describing the cuprates. This calls into question the use of band structures based on current restricted spin density functionals (including LDA) as a basis for single band theories of superconductivity in these materials.Comment: 13 pages, 8 figures, to appear in Phys. Rev. B, for more information see http://www.firstprinciples.co