The Power and Energy Society Annual Conference was held online from Hokkaido University in Sapporo, on August 24-26, 2021. total number of papers 274, sessions were 45. A panel discussion a special lecture also organized during the conference period. participants reached 1045. successfully completed with great contribution all participants. This report summarizes conference.

In this paper, we present a new type of PKC, system-oriented PKC,referred to as K(I)SOPKC that can be well adapted to a secure and a high speed communication between various systems and organizations of the present day network society. K(I)SOPKC is constructed on the basis of K(XIV)SE(1)PKC, a modified version of K(XII)SE(1)PKC [1], K(XIII)SE(1)PKC [2] and Kp(XIII)SE(1)PKC [2].

We discuss new constructions of Hadamard and conference matrices using relative difference sets. We present the first example of a relative (n, 2, n − 1, n−2 2 )-difference set where n − 1 is not a prime power.

The 13th International Congress of Developmental Biology met in Snowbird, Utah in July, and was impressive in the breadth of issues covered and the number of renowned researchers present. Under the guidance of President Janet Rossant and Executive Officer Ida Chow the meeting had its largest attendance in history with over a thousand participants. In addition to the majestic scenery of the surr...