I describe two new species of the previously monotypic, Chilean endemic nysonine genus Cresson : C. mariastea Packer, sp. nov . and salitrera nov. , redescribe type parvispinosus (Reed) provide an identification key for three species. clear up confusion associated with original material latter by designating a specimen from locality as lectotype The extend range northwards, one over 1000 km. su...

Abstract Controlling lost circulation during drilling operations in a reservoir prone to fluid losses is typically remedied by cement squeezing or plug setting as the last resort. The aim being minimize stop and regain full returns at surface, maintain wellbore integrity. Different placement methods of plugs have been discussed detail literature, except for ‘level-off’ method, which can be effe...

PT Semen Indonesia (Persero) Tbk. Pabrik Gresik merupakan salah satu perusahaan manufaktur pembuatan semen dan turunannya yang juga memiliki setiap potensi bahaya keselamatan terhadap aktivitas pekerjaan. Banyaknya risiko kecelakaan kerja mungkin terjadi selama proses dapat diminimalkan dengan melakukan safety behavior ketika bekerja. Penelitian ini bertujuan untuk menganalisis faktor anteceden...

Periodic pumping tests are now being used to characterize subsurface hydraulic parameters owing several advantages over conventional tests, for example, option of superposing periodic excitations on transients by the data processing in frequency domain. We derive an analytical model using a double-packer system isolate injection interval borehole penetrating either confined or unconfined anisot...