J. L. SILVÁN-CÁRDENAS*{{, L. WANG§ and F. B. ZHAN{ {Texas State University-San Marcos, Texas Center for Geographic Information Science, Department of Geography, 601 University Dr., ELA 139, San Marcos, TX 78666, US {Centro de Investigación en Geografı́a y Geomática, Ing. ‘‘Jorge L. Tamayo’’, Contoy 137, Lomas de Padierna, Mexico, D.F. 14240, MEX §Department of Geography, University at Buffalo, t...

Purpose This study aims to make foamed polylactic acid (PLA) structures with different densities by varying deposition temperatures using the material extrusion (MEX) additive manufacturing process. Design/methodology/approach The multiplier (EM) was calibrated for each temperature control foaming expansion. Material density determined extruded cubes optimal EM value temperature. influence of o...

Aiming to develop more robust, mechanically advanced, Fused Filament Fabrication (FFF) materials, High-Density Polyethylene (HDPE) nanocomposites were developed in the current research work. Titanium Dioxide (TiO2) was selected as filler be incorporated into HDPE matrix concentration steps of 0.5, 2.5, 5, and 10 wt.%. 3D printing nanocomposite filaments extruded ~1.75 mm diameter used print tes...

OBJECTIVE To identify the prevalence of depression in Mexican pediatric patients with systemic lupus erythematosus. MATERIALS AND METHODS Analytical transversal study including patients aged 7-16 years with a diagnosis of systemic lupus erythematosus seen at the Pediatric Rheumatology Consultation Service. The disease was classified by means of the MEX-SLEDAI questionnaire. Descriptive statis...

Translational control is an essential mechanism of gene control utilized throughout development, yet the molecular mechanisms underlying translational activation and repression are poorly understood. We have investigated the translational control of the C. elegans caudal homolog, pal-1, and found that GLD-1, a member of the evolutionarily conserved STAR/Maxi-KH domain family, acts through a min...

Since Mars lacks a global intrinsic magnetic field, the solar wind interacts directly with the Martian upper atmosphere and ionosphere. The presence of localized intense remnant crustal magnetic fields adds to this interaction, making the Martian plasma system a unique environment within the solar system. Rapid reductions in the electron flux, referred to as “electron holes,” occur within the M...

The distribution of heavy metals in El-Mex Bay located in Northern Egypt was studied. Eight metals (Cd, Cr, Co, Cu, Zn, Pb, Mn and Fe) were determined in water, Suspended Particulate Matter (SPM) and sediments. The Bay presents higher metal concentrations in aqueous Cd, Co and Pb are above the chronic freshwater quality criteria for aquatic life. Most of the dissolved trace metals displayed a n...

In the realm of scheduling problems different sources of uncertainty can invalidate the solutions. In this paper we are concerned with the generation of high quality downlink schedules in a spacecraft domain in presence of a high degree of uncertainty. In particular, we refer to a combinatorial optimization problem called MARS EXPRESS Memory Dumping Problem (MEX-MDP), which arises in the Europe...