By studying the physics behind toppling dominoes we are able to create a theory to predict the time for the dominoes to fall and if necessary, find an arrangement of dominoes that will optimize the topple time. The conservation of energy is used and all interactions between the dominoes are neglected except for the initial impact. Using the number of dominoes, the geometry of the chain, and the...

Wind routinely topples trees during storms, and the likelihood that a tree is toppled depends critically on its allometry. Yet none of the existing theories to explain tree allometry consider wind drag on tree canopies. Since leaf area index in crowded, self-thinning stands is independent of stand density, the drag force per unit land can also be assumed to be independent of stand density, with...

Extensive field and site investigations were conducted to assess evaluate the situation in presently exploited quarries of cement raw materials Yemen. These have several geological complications represented mainly by high elevations, steep slopes, rugged topography, heterogeneity bed thickness, lithologic composition quality, presence igneous sills dykes, intensive fracturing jointing abundance...

Abstract. Regional monitoring of rock slope failures using the seismic technique is rarely undertaken due to significant source location errors; this method also still lacks signal features needed understand events type because complex mass movement involved. To better comprehend these types events, 10 known along highways in Taiwan were analyzed. First, a hybrid (GeoLoc) composed cross-correla...

Controlled by regional geological background, and affected human activity weathering, toppling deformation slopes occur in different regions China. Based on statistics about domestic their distribution, the susceptibility zonation area of was determined. Firstly, a evaluation conducted according to these slopes, choosing landform, stratigraphic age, seismic intensity tectonic stress study divid...

A successful renormalization-group (RG) approach may provide signinicant insights of a system exhibiting power-law dependencies. In 1994, a RG scheme [1] was proposed for sandpile models which exhibit power-law behavior and function as the models of self-organized criticality [2]. One momentous result of such a RG approach is that BakTang-Wisenfeld (BTW) [2] sandpile posepossing a deterministic...

Recall that an excedance of a permutation $\pi$ is any position $i$ such $\pi_i > i$. Inspired by the work Hopkins, McConville and Propp (Elec. J. Comb., 2017) on sorting using toppling, we say toppleable if it gets sorted certain sequence toppling moves. One our main results number permutations $n$ letters same as those for which excedances happen exactly at $\{1,\dots, \lfloor (n-1)/2 \rfl...

The chronology of the geologic timescale’s stratigraphic units has been defi ned by a variety of methods. Over the decades many have waxed and waned in popularity, but at present the most important ones are: (1) radiometric dating, (2) astronomical “tuning,” (3) magnetostratigraphy, and (4) biostratigraphy. Each of these methods assumes deep time and uniformitarianism rather than demonstrating ...

Abstract Large granitic boulders resting on steep slopes represent considerable safety hazards that largely depend the location of contact surface characterized by impression d , denoting parallel distance between and original rock surface. On other hand, this reflecting often convex nature platforms, cannot be measured precisely, so Factors Safety (FoS) computed with input may have significant...

Tensile strength is an important parameter in many engineering applications. In loess slopes, for instance, it governs the development and propagation of tension cracks that usually ultimately lead to crack–sliding toppling failures, which are among most common modes slope failure Loess Plateau China. Reliable measurement tensile geomaterial therefore a necessity. Commonly used methods have lim...