Solution of the Static Deflection Mode Shape Function of the Cantilever Beam under Transverse Flow Based on the Boundary Shooting Method

According to the characteristics of the reactor internal structure of nuclear power plants, the vibration of the secondary core support pillar in water can be modeled as the vibration of the cantilever beam structure under the action of transverse flow, and its first beam mode is highly likely to be activated. It is thus necessary to dedicate a separate study on the first-order beam mode. In this work, we study the secondary core support pillar in nuclear reactor AP1000 under the action of transverse flow and focus on the derivation of its static cantilever deflection mode shape function in order to lay a foundation for the calculation of hydrodynamic added mass and frequency for the nuclear reactor internal components and their structural integrity evaluation. First, we proposed a set of nonlinear differential equations for the analysis of the single cantilever beam. Second, to solve the nonlinear differential equations, we used a boundary shooting framework in combination with the Runge–Kutta method. The results of the numerical simulation agree with the analytical solution to a very high degree, which demonstrates the effectiveness of the simulation method. Finally, we solved the static deflection mode shape function of the secondary core support pillar under the normal operating conditions. The nonlinear differential model and simulation method proposed in this paper can be used to solve the static cantilever deflection mode shape function of the equipment support tube.

Genetic control of anthracnose stalk rot resistance in tropical maize

ABSTRACT The genetic resistance to diseases in plants represents an important support pillar in modern agriculture. This study aimed to determine the genetic inheritance to anthracnose stalk rot resistance in tropical maize. Nine segregating families were obtained from contrasting inbred lines crosses. The parental lines and the filial generations (F1, F2, BC1 and BC2) were evaluated for antrachnose stalk rot resistance in an experiment in randomized blocks, with three replications. The treatments were arranged in a split-plot design, with family effect in the plots and generation effect in the split-plots. The results showed a similar inheritance among the families, with predominance of additive genetic effects. The inbreed lines (LR 04-2, LR 03-2 and LR 23-1) were very effective in transmitting resistance genes to their descendants because they allowed sharp decreases in the lesions length in the stalks. It was also possible to notice an oligogenic inheritance involved in the anthracnose stalk rot resistance for the evaluated families. It may be inferred that genetic gains from artificial selection could be successful for developing maize inbred lines more resistant to anthracnose stalk rot.

Research on the Stability Evaluation Model of Composite Support Pillar in Backfill-Strip Mining

Backfill-strip mining, which combines the advantages of strip mining and backfill mining, is proposed to overcome high cost and shortage of filling materials in coal mines at present. The composite support pillar (CSP) is a combined support pillar of the filling body and coal pillar for supporting the overlying strata and achieving subsidence control. The stability of CSP is the key to the success of subsidence control in backfill-strip mining engineering. A stability evaluation model of the CSP mechanical model was proposed. First, the lateral stress between the coal pillar and filling body is calculated in consideration of their interaction relation in CSP based on the earth pressure theory. Then, the width calculation models of the broken and plastic zones of three types of CSPs are established on the basis of limit equilibrium theory. On this basis, the mathematical model of the safety design width of the three types of CSPs is proposed to ensure the stability of CSP. Meanwhile, an engineering case of stability width design of CSP is shown. This study can provide theoretical reference and technical support for the engineering design of backfill-strip mining.

Dance Ranup Lampuan: Exploration Genius Aceh Movement and Expression Female Body Beauty Values in Culture Peumulia Jamee

Dance Ranup Lampuan is a very popular art of dance in Aceh. This dance exists in every welcoming guests, ceremonies, cultural events, and arrive at a formal event Aceh administration. This article answered about the genius of the woman's body movements in Aceh and expression of beauty in cultural values Peumulia Jamee dance Ranup Lampuan. With a soft and agile movement, dance Ranup Lampuan tells about women in Aceh who are preparing the betel for entertaining guests. Starting from picking and wiping betel, put lime and gambier, wrapping up the betel organize into place named puan or ceurana. After betel has been prepared, the dancers in dance Ranup Lampuan betel deliver to the invited guests. The purpose of it all is to welcome and praise guests or in the Acehnese language is referred to as Peumulia Jamee. The story is played in the Acehnese dance, in the lift pass culture Jamee Peumulia that is the tradition Acehnese people who like to eat and glorify guests with betel. Every movements in dance Ranup Lampuan has its own philosophical meaning. Acehnese woman's body that is synonymous with weak and soft, as well as in demand to cling to their cultural values. In this case, the woman Aceh has an important position as a support pillar dance Ranup Lampuan and culture Peumulia Jamee Aceh. Dance Ranup Lampuan represetasi women is a manifestation of Aceh and cultural values Peumulia Jamee, as a form of expression of ideas, ideas, understanding and confidence in social and cultural life of the people of Aceh, as a reflection of religious and cultural values in tridisi welcoming guests. Through dance Ranup Lampuan this, the women of Aceh were able to show the genius of his movement and to express beauty in cultural values Peumulia Jamee Aceh.

SUSTAINABLE FOOD SECURITY IN MOROCCO: CHALLENGES & OPPORTUNITIES

Food security is a major issue and constant challenge in the developingworld. Morocco has reached the target of the first MDG and, since 1990-1992, hasmaintained the prevalence of undernourishment level of 5%, but it remainsvulnerable to climate change in case of recurrence of drought and external shocks.Researches on food security in Morocco and its relationship with sustainabledevelopment are not been sufficiently developed in the direction ofproposing models of sustainable food security strategies. Then, this study aims toclarify the relationship between food security and sustainable food chain and topropose a roadmap for food security in Morocco, learnt from the visit study toSingapore as a leading country in food security. According to GFSI (Global FoodSecurity Index) of the Economist Intelligence unit, Singapore is ranked second inthe world after United States in 2015. Results outline the issues and challenges offood security at both global and national levels and highlight the strengths andweaknesses of food security in Morocco via the analysis of the Moroccan’s foodsecurity balance through the GFSI (Global Food Security Index) of the EconomistIntelligence Unit. Finally, this study proposes a roadmap to ensure sustainable foodsecurity in Morocco focused on two strategic pillars: governance andorganizational pillar and technical and financial support pillar. The first pillarconcerns the establishment of a national authority in charge of coordination andimplementation of food security strategies. The second pillar includes a set ofrecommendations related to technical and financial support aspects as optimizingstorage foods, increasing agricultural productivity via agro-ecologicalintensification and sensitizing farmers in adoption of sustainable agricultureprinciples.

Numerical Analysis on the Failure Mode of Stage Backfill Stope due to Mining Disturbance

Based on engineering background of Hemushan iron mine, the stress state, the displacement deformation and the plastic zone changes characteristic of backfill stope during different excavation processes are simulated. The results show that the maximum excavation effect domain happens around the surrounding rock and panel pillars. The vertical displacement of the room roof increases during excavation processing. The ore-body adjacent to the mined out area leads tensile failure trends. The tensile and shear zone dominates the room roof rock, and the support pillar is under shear significantly. The failure mode of SBF stope is obtained

Civic education and religious education in the function of democratization of education in the Republic of Serbia

Starting from the socio-political context of changes that have affected the education systems of Eastern European countries, the authors summarize the specific nature of the process of democratization of education in Europe at the turn of the century. The paper analyzes the purpose of democratization of education and of introduction of Civic Education and Religious Education classes in the education system of the Republic of Serbia, observing the idea that education may serve as a generator of social changes, and stating that school is an important support pillar in promoting and accepting the values of the community, as well as in personal growth and the development of every individual. The presented theoretical concepts are supported by the summary of results of empirical studies that have been focused on the analysis of the pedagogical aspects of the implementation of teaching these subjects at the secondary level of education from the perspective of teachers, pupils and parents. Based on the insight into the topic, the authors suggest searching for a ?common tangent? in Civic Education and Religious Education teaching process via an open and tolerant dialogue of participants of both subjects, which would enable the exchange of experiences, attitudes, and opinions of pupils, as well as coinciding and permeating of spiritual and democratic values as a foundation for further democratization of school in general.