Chinese Peasants and Communism ::

The Communist revolution in China was loosely based on the revolution in Russia. Russia was able to implement the beginnings of Marxist Communism in the way that it was intended They had a large working class of factory workers, known as the proletariat, that were able to band together and rise up to overthrow the groups of rich property owners, known as the bourgeoisie. The communist party wanted to adopted this same Marxist sense of revolution, but they realized that there were some fatal flaws in the differences between the two countries. The first was that there was not the same sense of class difference between people, yes there were peasants and landowners but there was not a sense of a class struggle. The other difference was that China was not industrialized like Russia so there was no proletariat group, as defined by Marxism, to draw the revolution from. What the Chinese Communists needed to do is re-define the proletariat for their situation, who they looked at were the pe asants. To see how the Communists looked at the peasants the anarchist view needs to be considered as it can be argued the the anarchists were a precursor to the Communists in the view of peasants. The anarchists tried to instil the idea of class struggle by saying the peasant revolution is showing resistance to taxes and opposition to the government and landlords. By showing opposition to taxes and the government the anarchists tried to bring about collapse due to lack of money which would in turn bring about a communitarian property system where the peasants would share land. The anarchists also did not seem that it was a stretch that peasants could be united citing that villages will work to protect their own, so if the idea can spread that all peasants are one big village that they would be able to unite. Mao Zedong held a very similar belief when he was left in charge of the peasant revolution in his home province of Hunan. Rather than have the peasants in silent protests against the government he advocated terror attacks against the landowners and officials. This was completely against Chinese tradition which favors more moderate action and an emphasis on harmony. Mao believed that with these â€Å"terror attacks† by the peasants, or as he called it their revolutionary potential, that the party can assume a leadership role. Without these acts of violence, without using the fullness of their strength, Mao believes that the peasants could never overthrow the authority of the landowning class.

Soil Behaviour and Geotechnical Modelling

(a) Discuss advantages and limitations of Duncan and Chang's model. Duncan and Chang's model assumes a hyperbolic stress-strain relation and was developed based on triaxial soil tests. The original model assumes a constant Poisson's ratio while the revised model accommodates the variation of Poisson's ratio by means of stress-dependent Poisson's ratio or stress-dependent bulk modulus. The Duncan-Chang model is advantageous in analyzing many practical problems and is simple to set up with standard triaxial compression tests. When tri-axial test results are not available, model parameters are also abundantly available in literatures. It is a simple yet obvious enhancement to the Mohr-Coulomb model. In this respect, this model is preferred over the Mohr-Coulomb model. However, it has its limitations, including, (i) the intermediate principal stress s2 is not accounted for; (ii) results may be unreliable when extensive failure occurs; (iii) it does not consider the volume change due to changes in shear stress (shear dilatancy); (iv) input parameters are not fundamental soil properties, but only empirical values for limited range of conditions. (v) the model is mainly intended for quasi-static analysis. (b) Discuss advantages and limitations of Yin and Graham's KGJ model. Yin and Graham's KGJ model is formed using data from isotropic consolidation tests and consolidated undrained triaxial tests with pore-water pressure measurement. It provides functional expressions for , , , and relationships in soils. In Duncan and Chang's model for triaxial stress conditions: may cause volume strain ( dilation and compression) may cause shear strain. Whereas Yin and Graham's KGJ model: Thus the volume change and shear strain was taken into account, which is an improvement to Duncan and Chang's model. The limitation of Yin and Graham's KGJ model may exist in the determination of the parameter and the complexity of its calculation. (c) Discuss the differences between elastic models and hypo-elastic models. For soils, the behaviour depend on the stress path followed. The total deformation of such materials can be decomposed into a recoverable part and an irrecoverable part. Hypoelasticity constitutes a generalized incremental law in which the behaviour can be simulated from increment to increment rather than for the entire load or stress at a time. In hypoelasticity, the increment of stress is expressed as a function of stress and increment of strain. The Hypoelastic concept can provide simulation of constitutive behaviour in a smooth manner and hence can be used for hardening or softening soils. Hypoelastic models can be considered as modification of linear elastic models. However, it may incrementally reversible, with no coupling between volumetric and deviatoric responses and is path-independent. 5.2 Use sketches to explain the physical (geometric) meaning of all 7 parameters (only 5 independent) in a cross-anisotropic elastic soil model (). Figure 5.1 Parameters in cross-anisotropic elastic model – Young's modulus in the depositional direction; – Young's modulus in the plane of deposition ; – Poisson's ratio for straining in the plane of deposition due to the stress acting in the direction of deposition; – Poisson's ratio for straining in the direction of deposition due to the stress acting in the plane of deposition; – Poisson's ratio for straining in the plane of deposition due to the stress acting in the same plane; – Shear modulus in the plane of the direction of deposition; – Shear modulus in the plane of deposition. Due to symmetry requirements, only 5 parameters are independent. Assignment 6 (Lecture 6 – Elasto-plastic behaviour): 6.1 (a) Explain and discuss (i) yield, (ii) yield criterion, (iii) potential surface, (iv) flow rule, (v) normality, (vi) consistency condition. (i) The yield strength or yield point of a material is defined in engineering and materials science as the stress at which a material begins to deform plastically. Prior to the yield point the material will deform elastically and will return to its original shape when the applied stress is removed. Once the yield point is passed some fraction of the deformation will be permanent and non-reversible. In the uniaxial situations the yield stress indicates the onset of plastic straining. In the multi-axial situation it is not sensible to talk about a yield stress. Instead, a yield function is defined which is a scalar function of stress and state parameters. (ii) A yield criterion, often expressed as yield surface, or yield locus, is an hypothesis concerning the limit of elasticity under any combination of stresses. There are two interpretations of yield criterion: one is purely mathematical in taking a statistical approach while other models attempt to provide a justification based on established physical principles. Since stress and strain are tensor qualities they can be described on the basis of three principal directions, in the case of stress these are denoted by , and . (iii) Potential surface is the segment of a plastic potential surface plotted in principal stress space, as shown in Figure 6.1 (a). A two dimensional case was shown in Figure 6.1 (b). (iv) Flow rule: – a scalar multiplier; – plastic potential function; {} – location of surface (a vector), not in the final equation Figure 6.1 Plastic potential presentation (v) Assuming the plastic potential function to be the same as the yield function as a further simplification: The incremental plastic strain vector is then normal to the yield surface and the normality condition is said to apply. (vi) Having defined the basic ingredients of an elasto-plastic constitutive model, a relationship between incremental stresses and incremental strains then can be obtained. When the material is plastic the stress state must satisfy the yield function. Consequently, on using the chain rule of differentiation, gives: This equation is known as the consistency equation or consistency condition. (b) Explain and discuss the associate flow rule and non-associate flow rule and how the two rules affect the volumetric deformation and the bearing capacity of a strip footing on sand. Sometimes simplification can be applied by assuming the plastic potential function to be the same as the yield function (i.e. ). In this case the flow rule is said to be associated. The incremental plastic strain vector is then normal to the yield surface and the normality condition is said to apply. In the general case in which the yield and plastic potential functions differ (i.e. ), the flow rule is said to be non-associated. If the flow rule is associated, the constitutive matrix is symmetric and so is the global stiffness matrix. On the other hand, if the flow rule is non-associated both the constitutive matrix and the global stiffness matrix become non-symmetric. The inversion of non-symmetric matrices is much more costly, both of storage and computer time. As noted, it occurs in a special class of plasticity in which the flow rule is said to be associated. Substitution of a symmetric for all elements in a finite element mesa, into the assembly process, results in a symmetric global stiffness matrix. For the general case in which the flow rule is non-associated and the yield and plastic potential functions differ, the constitutive matrix is non-symmetric. When assembled into the finite element equations this results in a non- symmetric global stiffness matrix. The inversion of such a matrix is more complex and requires more computing resources, both memory and time, than a symmetric matrix. Some commercial programs are unable to deal with non-symmetric global stiffness matrices and, consequently, restrict the typo of plastic models that can be accommodated to those which have an associated flow rule. (c) Explain plastic strain hardening and plastic work hardening or softening. The state parameters, , are related to the accumulated plastic strains . Consequently, if there is a linear relationship between and so that then on substitution, along with the flow rule, the unknown scalar,, cancels and A becomes determinant. If there is not a linear relationship between and , the differential ratio on the left hand side of the above equation is a function the plastic strains and therefore a function of . When substituted, along with the flow rule given, the A's do not cancel and A becomes indeterminate. It is then not possums to evaluate the []. In practice all strain hardening/ softening models assume a linear relationship between the state parameters and the plastic strains . In this type of plasticity the state parameters}, are related to the accumulated plastic work, ,which is dependent on the plastic strains it can be shown, following a similar argument to that parented above for strain hardening/softening plasticity, that as long as there is a linear relationship between the state parameters }, and the plastic work, , the parameter defined becomes independent of the unknown scalar, , send therefore is determinant. If the relationship between and is not linear, become a function of and it is not possible to evaluate the constitutive matrix. 6.2 Show steps to derive the elastic plastic constitutive matrix [] in (6.16). The incremental total strains can be split into elastic and plastic , componets. The incremental stress, are related to the incremental elastic strains, by the elastic constitutive matrix: Or alternatively Combining gives The incremental plastic strains are related to the plastic potential function, via the flow rule. This can be written as Substituting gives When the material is plastic the stress state must satisfy the yield function. Consequently, which, on using the chain rule of differentiation. This equation is known as the consistency equation. It can be rearranged to give Combining, we can get Where Substituting again So that 6.3 The dimension of a slope is shown in Figure 6.2. Calculate the factor of safety of the following cases: (a) Without tension crack, the properties of Soil (1) are kPa, , kN/m3; The properties of Soil (2) are kPa, , kN/m3 (no water table). (b) With tension crack filled with water, repeat the calculation in (a). (c) Without tension crack, the properties of Soil (1) are kPa, , kN/m3 (below water table) and kN/m3 (above water table); the properties of Soil (2) are kPa, , kN/m3 (below water table) and kN/m3 (above water table). Water table is shown. Figure 6.2 Dimension of the slope and water table (a) Figure 6.3 Model without tension crack or water table Factor of Safety: 1.498 Figure 6.4 Results without tension crack or water table Figure 6.5 Slice 1 – Morgenstern-Price Method (b) Figure 6.6 Model with tension crack filled with water Figure 6.7 Results with tension crack filled with water The safety factor : 1.406 Figure 6.8 Slice 1 – Morgenstern-Price Method (c) Figure 6.9 Model without tension crack but with water table Figure 6.10 Results without tension crack but with water table Factor of Safety: 1.258 Figure 6.11 Slice 1 – Morgenstern-Price Method

Forensic Accounting in Practice - 1443 Words

Running Head Page 1 Forensic Accounting In Practice Ronald Wimberly-EL Bagher Fardanes, Ph.D, MPA Business 508 May 19,2013 Running Head: Forensic Accounting In Practice Page 2 The five most important skills a forensic accountant should know are: Accounting, Auditing, Investigative, Evidence gathering, and†¦show more content†¦More importantly, they help put together and implement systems and controls to prevent internal or external fraud from happening again.[Forensic Accounting: Kessler Internet]. Running Head: Forensic Accounting In Practice Page 4 Accounting professionals do important responsibilities beyond preparing financial statements. In a more critical role, they help managers interpret the statements by comparing data about the firm’s current activities to those for previous periods and to results posted by other companies in the industry. Fraud, by its very nature, is hidden in the accounting systems of organizations and therefore a forensic accountant is usually required to unravel the transaction history and reveal what has actually occurred. As part of this, the forensic accountant is often called upon to quantify the value of the loss experienced by an organization or individual. Any lost funds are traced from bank account to bank account to identify where the money( or assets ) being overstated by false accounting in the financial statements and records. The forensic accountant’s role is therefore to understand the accounting records and show the true nature of the transactions being recorded. 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