Tool traveling and tool switching time constitute almost seventy percent (70%) of the total timeconsumed in drilling process. This fact that 70% of the total time is nonproductive and does not add any value to the job, grabs attention of the researchers and the industrialist for optimization. A literature on drilling process revealed that very few ...

By Mehmood Nasir, Muhammad Umer, Umer Asgher

In Bosnia and Herzegovina, Tertiary volcanic rocks occur within two geotectonically different areas: (1) in northeastern Bosnia, the wider area of Srebrenica and, (2) to a lesser extent in central Bosnia, the wider areas of Maglaj, Teslić and Nemila (Kolići). The major and trace element variations in the rocks surrounding Maglaj indicate their high...

By Zehra Salkić, Elvir Babajić, Alisa Babajić, Vedran Pobrić, Aldin Bešić

Pesticide metsulfuron-methyl (chemical name: methyl 2-(4-methoxy-6-methyl-1,3,5-triazin-2- ylcarbamoylsulfamoyl)benzoate) is a post-emergence sulfonylurea herbicide which controls most annual grass broadleaf weeds in cereals, and it has been used for a long time.The effect of metsulfuron-methyl on microbiological activity in soil was investigated. ...

By Ljiljana Radivojević, Dubravka Jovičić, Ljiljana Šantrić, Slavica Gašić, Jelena Umiljendić Gajić

U ovom radu prikazani su rezultati mjerenja koncentracije aktivnosti radona u seizmički aktivnim zonama Tuzlanske regije. Od velikog broja metoda za mjerenje koncentracije aktivnosti radona izabrana je metoda trag detektora tipa CR39, koji su pogodni za dugotrajna mjerenja radona, od nekoliko dana do više mjeseci, pri čemu dobijeni rezultati predst...

By Uzeir Spona

Prilikom istraživanja ruderalne vegetacije Pala izdvojena je zajednica Onopordetum acanthii Br.-Bl. 1926. U radu je prikazan floristički sastav, ekološke i fitogeografske karakteristike ove asocijacije. Floristički sastav navedene fitocenoze čine 94 vrste od kojih edifikatorska vrsta Onopordum acanthium ostvaruje najveći stepen prisutnosti (...

By Slađana Petronić

In aim discussed about ruderal flora in the region Pale. Plant material collected from the surface that has been stamped out area, the places where defer droppings, organic or inorganic source, around the old deserted railroad tracks, along the roads, around construction sites, around the Miljacka riverbed, and from cultivated and uncultivated gree...

By Slađana Petronić, Dragana Pavlović, Vesna Milić

The paper describes a new way of injecting soil in order to repair the foundation of building facilities. This procedure is known under the name "JET grouting. Property procedure is that the depth of the ground, below ground facility, the addition cementnog veziva, create posts of autochthonous soil and cement, with a much stronger mechanical (defo...

By Petar Mitrovic