O u r ability to detect and monitor infectious disease threats to health is in jeopardy. False perceptions that such threats had dwindled or disappeared led to complacency and decreased vigilance regarding infectious diseases, resulting in a weakening of surveillance--the foundation for control of infectious diseases (1). However, such infectious diseases as acquired immunodeficiency syndrome (...

introduction recently, employment of rotary tillers has been expanded in gardens and small farms, especially in the northern of iran. however using the l-shaped blades in the conventional rotary tillers have some problems such as severe vibration problems, weeds stucking around the blades, forming the plow pan and lower performance due to the less powers of such small rototillers. therefore in ...

Even as the world we knew is crumbling, with deepening social and economic inequalities, ever-growing environmental crises, COVID-19 pandemic, still seem to be stuck in prosaic imagi...

In this paper we continue the study of ‘sabotage modal logic’ SML which was suggested by van Benthem. In this logic one describes the progression along edges of a transition graph in alternation with moves of a saboteur who can delete edges. A drawback of the known results on SML is the asymmetry of the two modalities of ‘moving’ and ‘deleting’: Movements are local, whereas there is a global ch...

The great number of actors in port city regions, such as authorities, municipalities, national governments, private companies, societal groups, and flora fauna, need to develop shared visions. Collaborative approaches that focus on combined values can help achieve long-term resilience enable a sustainable just coexistence within the same territory. However, sheer economic profit generated by ac...

Purpose. To increase the stability of wellbore during its construction in unstable rocks. Methodology. solve set tasks, an integrated approach is used work, which includes critical analysis and generalization scientific technical achievements combination with theoretical experimental research. Findings. Factors influencing borehole walls conditions prone to rock slides falls are analyzed. Exped...