This paper presents a geometric-variational approach to continuous and discrete mechanics and field theories. Using multisymplectic geometry, we show that the existence of the fundamental geometric structures as well as their preservation along solutions can be obtained directly from the variational principle. In particular, we prove that a unique multisymplectic structure is obtained by taking...

nature displays profound preference for certain specific ratios to design her life-forms. these are geometric relationships that are transcendent and originated from sacred geometry. the view that geometry had a ritual origin is a part of a wider view that civilization itself had a ritual origin, and therefore the history of utilization of sacred geometry by man goes back to many centuries ago....

With ongoing development of new technological devices, the demand for efficient magnetic materials and composites has significantly increased. Micromagnetic simulations can predict magnetization distribution on sub micrometer scales. Due to performance purposes these are often run finite differences schemes. In contrast method, element based micromagnetic posses high flexibility with geometry. ...

the present study investigated the possibility of replacing salamon with modified shotor diluent (msd) and egg yolk (ey) with low density lipoprotein (ldl) for chilled storage of ram semen. good quality semen (>80% progressive forward motility (pfm) of sperm) from 3 fertile rams was collected using an artificial vagina and pooled for each experiment. low density lipoprotein was extracted from f...

background: environmental problems of the plastic materials used in food packaging and the demand for food quality improvements lead to the development of packaging in natural materials. edible films such as calcium alginate extend the shelf life by acting as a selective barrier against moisture and oxygen. the main objective of this study was to explore a calcium alginate based edible film to ...

background: in vitro maturation (ivm) of immature oocytes collected from ovary has been proposed for fertility preservation. in addition, quality of oocytes post ivm is one of the factors determining its developmental competence. by using the non-invasive polscope system, both meiotic spindle (ms) and zona pellucida (zp) can be assessed in living oocytes. objective: the aim was to investigate t...

Introduction: Ability to reconstruct the papilla in anterior maxilla is important aspect of perio-plastic surgery. In most articles, connective tissue is used with different designs of incisions. The aim of this study was to use sub-epithelial connective tissue graft (SCTG) with two types of incisions called papilla preservation and semilunar. Materials & Methods: This basic randomized clinica...

Background: Epididymal spermatozoa have been used for production of offspring from genetically important animals after they are dead. To attain optimal fertility with epididymal spermatozoa, they should be preserved in a suitable medium in 37°C. Preservation media provides requirement for spermatozoa and affects its motility, viability, and fertility. Sucrose is one of the important components ...