Consider the Cauchy problem for a strictly hyperbolic, N×N quasilinear system in one space dimension ut + A(u)ux = 0, u(0, x) = ū(x), (1) where u 7→ A(u) is a smooth matrix-valued map, and the initial data u is assumed to have small total variation. We investigate the rate of convergence of approximate solutions of (1) constructed by the Glimm scheme, under the assumption that, letting λk(u), r...

Môi tr??ng ??u t? là m?t trong nh?ng nhân t? có ?nh h??ng l?n t?i ho?t ??ng thu hút v?n tr?c ti?p n??c ngoài. Trong n?m qua, t?nh Thái Nguyên ?ã ??t ???c thành t?u nh?t ??nh vi?c c?i thi?n môi nh?m Tuy nhiên, làm th? nào ?? th? nâng cao h?n n?a ngoài bài toán mà c?n ph?i xem xét. Nghiên c?u c?a tác gi? phân tích thông qua ch? s? n?ng l?c c?nh tranh c?p t?nh, ??n vào Nguyên. Ngu?n li?u th? tích,...

This paper presents new U–Th/He crystallization and He exposure ages on olivine for a suite of basalt samples from the Snake River Plain, Idaho. The results provide the first demonstration that U–Th/He geochronology can be successfully applied to Late Quaternary basalts using measurements of olivine phenocrysts as opposed to U-rich minerals. The approach employs abrasion to remove the outer rin...

A b s tr a c t: T h e n e e d to le a rn fro m in c id e n ts a n d a c c id e n ts re s u ltin g fro m s o ftw a re fa ilu re to im p ro v e th e d e v e lo p m e n t p ro c e s s a n d re d u c e th e in c id e n c e o f s u c h e v e n ts m a n d a te s a rig o ro u s d is c ip lin e o f fo re n s ic s o ftw a re e n g in e e rin g. T h e p ro life ra tio n o f a s s u m p tio n in th e n o ...