Leadership is key in sports management, as it allows organizations to endure over time. style determines how an organization or club works. The purpose of this study investigate employees’ perceptions the leadership presidents (managers) amateur clubs and influences effort, efficiency satisfaction those employees. sample consists managers (N = 334), whom 286 are men 48 women, with average age 4...

Humidity, along with other climatic factors such as temperature, can impact the skin health. Indeed, our is daily exposed to humidity and temperature variations. All around world, varies from low high relative (45% 90%). In addition, reach 44°C under sun exposure. The rare studies available show that causes several changes in (dryness, itchiness, impairment of desquamation process, roughness, l...

In this paper, we propose a short and efficient certificatebased signature (CBS) scheme. Certificate-based cryptography proposed by Gentry [6] combines the merit of traditional public key cryptography (PKI) and identity based cryptography, without use of the costly certificate chain verification process and the removal of key escrow security concern. Under this paradigm, we propose the shortest...