subalpine ecosystems are highly fragile as compared to biological andenvironmental factors. landslide is one of the ruinous upshots of this ecosystem. one of theimpressionable areas in the cause of natural factor is masoleh watershed in western alborzmt, (iran). in order to landslide hazard zonation, landslide index and frequency ratio methodbased on twelve causative factors such as slope, slop...

flood frequency analysis is faced with the problem of data and information limitation in arid and semi-arid regions. particularly in these regions, the length of records is usually too short to ensure reliable quantile estimates. more than 75% of iran is located in arid and semi-arid regions and despite the low annual precipitation, often large floods occur. one way to provide more information ...

This article examines the time duration of individual occasions in light discovery that temporal succession produces frequency ratios. The ratios are used to define energy and quantum. manifold common particles constructed graphically using arrows time, with mass-ratios derivable from graphs. formal reduction physics compels us adopt Whitehead's conception physical universe as experience engage...

the freshwater angel fish (pterophyllum scalare schultze, 1823) is south american cichlid become very popular among aquarists. there is little information on their culture and aquarium husbandry. in this study growth performance and survival rate of angelfish subjected to different feeding frequencies were evaluated. four groups of angel fish juveniles (0.87 ± 0.01 g; 3.98 ± 0.08 mm) were fed e...

It is known that subglottal pressure (Psb) is a major factor in the control of fundamental frequency (Fo) in speech. Yet, the details of this relation remain unclear. Estimates of the Fo to Psb ratio (FPR) from speech and special phonation tasks yield values between 5 and 15 Hz/cmH20 [1,2,3,4]. In another type of experiments pressure variations are induced externally, either subglottally or sup...