On the incorporation of cubic and hexagonal interfacial energy anisotropy in phase field models using higher order tensor terms

In this paper, we show how to incorporate cubic and hexagonal anisotropies in interfacial energies in phase field models; this incorporation is achieved by including upto sixth rank tensor terms in the free energy expansion, assuming that the free energy is only a function of coarse grained composition, its gradient, curvature and aberration. We derive the number of non-zero and independent components of these tensors. Further, by demanding that the resultant interfacial energy is positive definite for inclusion of each of the tensor terms individually, we identify the constraints imposed on the independent components of these tensors. The existing results in the invariant group theory literature can be used to simplify the process of construction of some (but not all) of the higher order tensors. Finally, we derive the relevant phase field evolution equations.Comment: About 14 pages; 2 figures, to be submitted for revie

Enantioselective Total Synthesis of (+)-Salvileucalin B

An enantioselective total synthesis of the diterpenoid natural product (+)-salvileucalin B is reported. Key findings include a copper-catalyzed arene cyclopropanation reaction to provide the unusual norcaradiene core and a reversible retro-Claisen rearrangement of a highly functionalized norcaradiene intermediate

Rapid Assembly of the Salvileucalin B Norcaradiene Core

Preparation of the polycyclic core of the cytotoxic natural product salvileucalin B is described. The key feature of this synthetic strategy is a copper-catalyzed intramolecular arene cyclopropanation to provide the central norcaradiene. These studies lay the foundation for continued investigations toward an enantioselective total synthesis of 1

Supplier Selection Based On Capabilities Index For Multiple Characteristics With One Sided Specification

Raw materials are a significant requirement in the production process for manufacturing companies. In meeting the needs of raw materials for the production process, most manufacturing firms rely on suppliers. Supplier selection is an essential part of manufacturing companies. From several supplier selection criteria, quality is one of the fundamental standards and is used in supplier assessment. Selecting suppliers based on the quality of their products will have a positive impact on manufacturing companies, such as increased profits through reduced operational costs and increased market share. The problem faced is the lack of accuracy in choosing qualified suppliers. In this study will compare two suppliers at manufacturing companies and pick one that has a higher capability value. Supplier selection is made by using multiple characteristic capability indexes. The Supplier will be selected by comparing the ratio of two suppliers. Numerical calculations are performed on leather suppliers in shoe companies based on bursting quality, tear strength, tensile strength and elongation. The result of the calculation can be seen that supplier B is chosen as a better supplier. Characteristics of quality will affect the production process and application of shoes

Analysis of Factors Related to the Stroke in Patients with Stroke in Ward C 1st Floor and 2nd Floor in the Rssn Bukittinggi 2016

Stroke still become a health problem of society, due to the high incidence of morbidity, mortalities, and disability. Stroke attack estimated 25% was recovered from the first stroke in five years. Stroke occurrence because of risk factors an unhealthy lifestyle. The aim of this research was to determine to analyze risk factors (smoking and sports habits, diet and medical check-up obedience) related to the causes of stroke attack. The research of methods was observational analytic with a retrospective approach. The result of this research shows that smoking habits unrelated to stroke occurrence (p-value 1,000). Diet obedience unrelated to stroke occurrence (p-value 0,952). Sport habits unrelated to stroke occurrence (p-value 0,501). Medical check-up obedience was unrelated to stroke occurrence (p-value 0,069). In conclusion, there is not a relationship between smoking habits, diet obedience, sport habits, and medical check-up obedience by the stroke. It is advisable to the institutional hospital can give information to stroke patients the cause of incidence stroke not only one but many factors, and then how to control to avoid stroke attack and recurrent stroke attack

Analisis Produk Unggulan Tanaman Pangan di Provinsi Riau

This research is done/conducted by in Province Riau. The selecting of this area because to know superior product of food crop in Province Riau and To see the level of contribution of subsektor food crop to agricultural sector and agricultural sector contribution in economics of Province RiaU. Type and data source which is used in this research is data of sekunder Time Series, that is obtained from information and also report published by Statistical Body Center of Province Riau, and statistical publication data of Indonesia. Result of this research is expected can be of benefit to government of Province Riau expected can be made as input in making policy and execution of development of Province Riau a period of/to to come and upon which information to researchers hereinafter. From result of research obtained by paddy crop represent superior product of food crop in Riau province because seen from result of analysis of LQ got that paddy crop of year 2008 - 2012 having value of LQ > 1 , that is in the year 2008 with value of LQ 1,36512, year 2009 with value of LQ 1,32451, year 2010 value of LQ 1,37013, year 2011 with value of LQ 1,35989, and year 2012 with value of LQ 1,33677. This its meaning of paddy crop represent superior product of food crop of Province Riau.Keywords: Superior Product, Location Quotient, Food Cro