antenna structures with low side lobe levels are normally the main goal during antenna design. in this paper, a new method for reduction of radiation pattern side lobe level in phased array antenna with uniform and non-uniform weighting is presented. in this method, by changing the array elements weight or adding several elements, such as slc technique, the pattern with low side lobe level can ...

Telah dilakukan penelitian untuk menentukan bidang gelincir pada daerah Wisata Bukit Chinangkiek, Kabupaten Solok menggunakan metode geolistrik resistivitas dua dimensi konfigurasi Wenner-Schlumberger. Penelitian ini 2 lintasan dengan panjang bentangan 80 meter software Res2Dinv. Hasil pengolahan data berupa penampang bawah permukaan yang menunjukkan bahwa diduga memiliki lapisan batuan gamping...

background: disorders of sex development (dsds) belong to uncommon pathologies and result from abnormalities during gonadal determination and differentiation. various gene mutations involved in gonadal determination and differentiation have been associated with gonadal dysgenesis. despite advances in exploration of genes and mechanisms involved in sex disorders, most children with severe 46,xy ...

In this paper two linear arrays including a linear 1×4 and a planar 2×2 of microstrip patch and half-mode substrate integrated waveguide (SIW) cavity hybrid antenna are introduced and investigated. These are simply implemented using low cost single layer printed circuit board (PCB) process. The array element consists of a rectangular microstrip patch with appropriate dimensions in the vicinity ...

The availability of clean water in the Kuber Beach tourist area is not known for certain. To determine depth and characteristics aquifer, rock resistivity measurement was carried out using geoelectric method with Schlumberger configuration on two tracks a span 200 m each. results showed that semi-confined aquifer at below 8 from ground surface. Aquifers sand lithology have low potential, while ...

We have studied the velocity dispersion of guided waves in transversely isotropic formations. Theoretical velocity dispersion curves were calculated with elastic constants based on laboratory and field measurements and compared to dispersion curves for isotropic formations having the same vertical po and S-wave velocities. The symmetry axis for the transverse isotropy was parallel to the boreho...

We present improved combinatorial approximation algorithms for the uncapacitated facility location and k-median problems. Two central ideas in most of our results are cost scaling and greedy improvement. We present a simple greedy local search algorithm which achieves an approximation ratio of 2:414+ in ~ O(n= ) time. This also yields a bicriteria approximation tradeo of (1+ ; 1+ 2= ) for facil...