The problem of building supersymmetry in the quantum mechanics of two Coulombian centers of force is analyzed. It is shown that there are essentially two ways of proceeding. The spectral problems of the SUSY (scalar) Hamiltonians are quite similar and become tantamount to solving entangled families of Razavy and Whittaker–Hill equations in the first approach. When the two centers have the same ...

A brief review of previous studies shows that topographic features play an important role in the amplification (de-amplification) seismic waves. Most researchers who have focused on effects paid attention to distribution isolated features, whereas what is seen nature often more complicated. It known 2D or 3D geological structures further contribute ground motion. The main objective this study i...

soil erosion is undoubtedly one of the most important problems in natural areas and has a devastating impact on grassland ecosystems. the present study was conducted to assess the ability of rangeland hydrology and erosion model for estimating sediment yield on rangeland’s hill slopes in dry regions at shahid noori paired watershed of kakhk. rhem is a mathematical, distribution and physical mod...

This study aimed to determine the effect of biofertilizers from bamboo shoots and nitrogen (N) fertilizer on growth production lowland rice (Oryza sativa L.). The used a Randomized Block Design (RBD) with 2 factors. first factor is biofertilizer 3 levels : R1 = 20 ml/l water/plot, R2 30 R3 40 water/plot. second N (Urea) U1 20g/plot (100kg/ha), U2 30g/plot (150kg/ha), U3 40g/plot (200kg/ha). res...

This study presents an updated attenuation model to predict the peak ground acceleration (PGA), velocity (PGV), 5% damped pseudo-spectral (SA), and average spectral (AvgSA) at hill zone of Mexico City for interface earthquakes. The strong-motion dataset comprises 33 earthquakes recorded CU station, covering a moment magnitude (Mw) range from 6.0 8.1 source-to-site distance (Rrup) 240 490 km. Gi...

|This paper is concerned with function optimization in binary search spaces. It focuses on how hill-climbers can work together and/or use their past trials in order to speed up the search. A hill-climber is viewed as a set of mutations. The challenge is twofold: one must determine how many bits should be mutated, and which bits should preferably be mutated, or in other words, which climbing dir...

Using internet-based software known as 1000Minds, choice-experiment surveys were administered to experts and farmers from the Irish sheep industry to capture their preferences with respect to the relative importance - represented by part-worth utilities - of target traits in the definition of a breeding objective for sheep in Ireland. Sheep production in Ireland can be broadly separated into lo...