spl(2,1) dynamical supersymmetry and suppression of ferromagnetism in flat band double-exchange models

The low energy spectrum of the ferromagnetic Kondo lattice model on a N-site complete graph extended with on-site repulsion is obtained from the underlying spl(2,1) algebra properties in the strong coupling limit. The ferromagnetic ground state is realized for 1 and N+1 electrons only. We identify the large density of states to be responsible for the suppression of the ferromagnetic state and argue that a similar situation is encountered in the Kagome, pyrochlore, and other lattices with flat bands in their one-particle density of states.Comment: 7 pages, 1 figur

Analisis Finansial Pemanenan Kayu Teknik Reduced Impact Logging Melalui Skema REDD+, Kalimantan Utara

The research was done at natural tropical forest of PT Inhutani II, East Kalimantan. The objectivesof the research were to study the carbon (C) stock in the natural tropical forest after conventional andreduced impact logging (RIL) and to get the effectivity of RIL based on carbon stock, financial andenvironmental aspects. The effect of conventional and RIL to environment and carbon stock in theplots were studied using the data of three plots with each size 100 m x 100 m. The plots are placedbased on purposive sampling at landing, main skiddtrail and branch skiddtrail, respectively. Cstocks are counted by allometric equation and C economics by the economic acceptance of REDD.Economic value of RIL was IDR 1,604,518,900,- ha-1. Based on financial analysis showed that RILwas feasible and profitable at rate of interesst 16 %

HAM dan Politik Kriminal Pasca Orde Baru (Konstruksi Pelanggaran HAM pada Kasus Pembantaian Dukun Santet di Kabupaten Banyuwangi Tahun 1998)

This research is motivated by the case of human rights violations during the massacre witches in Banyuwangi in 1998. The central government that when it is exposed to many issues require a diversion issues in other areas to divert attention began when the reform era turn of the new order of oligarchs capitalist towards a democratic state. Therefore, this study will analyze the motives brutality of human rights violations that led to the massacre of the witches. The purpose of this research that examines how government as the dominant party using a various social control to a group that dominated the society. This study used qualitative methods - descriptive. The subjects were the victims and the community leaders who concern about the problems of this massacre case. By using the theory of hegemony to explore the phenomenon of the role of the state to a case that comes to the human rights violations like this. Namely data collection techniques with direct observation to the test site and the literature to comparison be empirical research results also snowball technique purposive sampling. Based on the analysis of cases of human rights violations during the massacre witches in Banyuwangi 1998 as a whole is a game the government on the transfer issue. Turbulent political force people to accept an issue to distract him from the turmoil in the capital but did not go according to the destination. The lack of public understanding about the violation of Human Rights to make the case - a case that concerned have not or even cannot be resolved properly, including cases of human rights violations in Banyuwangi 1998's

Self-consistent approach for the quantum confined Stark effect in shallow quantum wells

A computationally efficient, self-consistent complex scaling approach to calculating characteristics of excitons in an external electric field in quantum wells is introduced. The method allows one to extract the resonance position as well as the field-induced broadening for the exciton resonance. For the case of strong confinement the trial function is represented in factorized form. The corresponding coupled self-consistent equations, which include the effective complex potentials, are obtained. The method is applied to the shallow quantum well. It is shown that in this case the real part of the effective exciton potential is insensitive to changes of external electric field up to the ionization threshold, while the imaginary part has non-analytical field dependence and small for moderate electric fields. This allows one to express the exciton quasi-energy at some field through the renormalized expression for the zero-field bound state.Comment: 13 pages, RevTeX4, 6 figure

Quasiparticle dynamics and phonon softening in FeSe superconductors

Quasiparticle dynamics of FeSe single crystals revealed by dual-color transient reflectivity measurements ({\Delta}R/R) provides unprecedented information on Fe-based superconductors. The amplitude of fast component in {\Delta}R/R clearly tells a competing scenario between spin fluctuations and superconductivity. Together with the transport measurements, the relaxation time analysis further exhibits anomalous changes at 90 K and 230 K. The former manifests a structure phase transition as well as the associated phonon softening. The latter suggests a previously overlooked phase transition or crossover in FeSe. The electron-phonon coupling constant {\lambda} is found to be 0.16, identical to the value of theoretical calculations. Such a small {\lambda} demonstrates an unconventional origin of superconductivity in FeSe.Comment: Final published version; 5 pages; 4 figure

Recent Enhancements to the Development of CFD-Based Aeroelastic Reduced-Order Models

Recent enhancements to the development of CFD-based unsteady aerodynamic and aeroelastic reduced-order models (ROMs) are presented. These enhancements include the simultaneous application of structural modes as CFD input, static aeroelastic analysis using a ROM, and matched-point solutions using a ROM. The simultaneous application of structural modes as CFD input enables the computation of the unsteady aerodynamic state-space matrices with a single CFD execution, independent of the number of structural modes. The responses obtained from a simultaneous excitation of the CFD-based unsteady aerodynamic system are processed using system identification techniques in order to generate an unsteady aerodynamic state-space ROM. Once the unsteady aerodynamic state-space ROM is generated, a method for computing the static aeroelastic response using this unsteady aerodynamic ROM and a state-space model of the structure, is presented. Finally, a method is presented that enables the computation of matchedpoint solutions using a single ROM that is applicable over a range of dynamic pressures and velocities for a given Mach number. These enhancements represent a significant advancement of unsteady aerodynamic and aeroelastic ROM technology