A Helmholtzian operator and electromagnetic-nuclear field

submitted by: cloudmichael
A Helmholtzian operator is a linear second order partial differential operator, typically in four independant variables; a generalization of the d'Alembertian operator where it's additional constant vanishes. When the time-independant version (in three independent (space) variables acting on a function or vector vanishes, the resulting equation is called the Helmholtz's equation. In four dimensions this equation is referred to as the Klein-Gordon equation (with imaginary constant) . The...

master of art-Imperial City of the Southern Song Dynasty

linked profile(s): MinglouChen
submitted by: MinglouChen
Dear Sir/Madam, i am honored to tell you that Chen Minglou’s important painting Imperial City of the Southern Song Dynasty has been finished after five years ‘hardworking.. The painting is half a meter in width, more than 28 meters in height. Size of people, buildings and other articles in the Painting for Imperial City of the Southern Song Dynasty is almost same with those in the “Along the River During the Qing Ming Festival”showed on the 2010 shanghai Expo, but the...

The d'Alembertian and Maxwell's equations

submitted by: cloudmichael
The d'Alembertian is a linear second order differential operator, typically in four independant variables. The time-independant version (in three independent (space) variables is called the Laplacian operator. When it's action on a function or vector vanishes, the resulting equation is called the wave equation (or Laplace's equation). When it's action is identified with a non-zero function (or vector function) the resulting equation is called Poisson's equation. This equation is fundamental...

Auditory Interfaces for Indoor navigation

submitted by: shreyans2

This video explains our current research in the VEMI lab to find best possible interface for indoor navigation to be used by blind and sighted users.

One Way to Structure an Hour in an Elementary Classroom.

submitted by: KidsJudgePartnership

A fourth grade teacher describes strategies she uses to structure individual lessons in her elementary school classroom. In the video you will notice biomedical science students from Charles Drew University of Medicine and Science observing Ms. Thai in her classroom prior to starting their mentoring activities with the elementary school students.

A Firm Foundation For Private Data Analysis

submitted by: cdwork2003@yahoo.com
In the information realm, loss of privacy is usually associated with failure to control access to information, to control the flow of information, or to control the purposes for which information is employed. Differential privacy arose in a context in which ensuring privacy is a challenge even if all these control problems are solved: privacy-preserving statistical analysis of data. The problem of statistical disclosure control— revealing accurate statistics about a set of...
Authors: Cynthia Dwork