Symulacja warunków krzepnięcia wysokojakościowych odlewów dla przemysłu górniczego

To obtain a right casting methoding of a yoke used in mining industry, a computer simulation of filling of mould cavity as well as casting solidification has been applied. Analysis of the casting solidification showed, that an initial casting methoding, based on common foundry practice, had to be changed. An initial bottom gating system was changed into a side-bottom one, what allowed smooth filling of mould cavity. Modified risering system enabled proper feeding of the casting. Ensuring high quality casting enable to substitute parts manufactured by forging.Dla uzyskania właściwej technologii odlewania jarzm dla przemysłu górniczego wykorzystano komputerową symulację zapełniania wnęki formy i krzepnięcia odlewu. Analiza procesu krzepnięcia odlewu wykazała, że zastosowana typowa technologia odlewania musi być zmieniona. Syfonowy układ wlewowy zastąpiono doprowadzeniem metalu z boku u dołu formy, co zapewniło spokojne wypełnienie wnęki formy. Zmodyfikowany układ zasilający zapewnił odpowiednie zasilenie, co gwarantuje wysoką jakość odlewu i wyeliminowanie odkuwek

Metacognitive Ability Effect on Leadership Development

Leadership is the single most important element for the success of an organization. This explains why leadership skill is one of the most sought after skills. The only challenge is that effective leaders are few. Leadership development is meant to eradicate the shortage of leaders but there is a widespread outcry about the effectiveness of the current leadership interventions. Despite the huge expenditure in developing leaders, the outcomes are not comparable to the resources invested. Beyond the traditional elements (content, context, program length and delivery) of leadership development, the boundaries of research and practices have to be extended to the neglected elements of learning like metacognitive ability, hence this study examines the effect metacognitive ability on leadership development. The study was conducted among MBA students within private universities in Kenya. The sample size was 314 students, with a response rate of 92 percent. The results reveal that metacognitive ability significantly predicts leadership developments. The results imply that the higher the levels of metacognitive ability that leadership development participants have, the better they are at acquiring leadership skills