One of the three major goals of the Atmospheric Radiation Measurement (ARM) Program is to improve the quality of radiation models under clear sky, homogeneous cloud, and broken cloud conditions. This report is concerned with the development of the theory of radiation transfer in the broken clouds. Our approach is based on a stochastic description of the interaction between the radiation and clo...

Based on the promising developments in Cloud Computing technologies in recent years, commercial computing resource services (e.g. Amazon EC2) or software-as-a-service offerings (e.g. Salesforce.com) came into existence. However, the relatively weak business exploitation, participation, and adoption of other Cloud Computing services remain the main challenges. The vague value structures seem to ...

Cloud computing is a new paradigm that offers several advantages in terms of scalability, maintainability, high availability, efficiency and data processing. Infrastructure and applications are moved to the cloud and provided as a pay-for-use service. When designing a cloud infrastructure, it is critical to assure beforehand that the system will be able to offer the desired level of QoS (Qualit...

Cloud Computing (CC) has become one of the most talked about emerging technologies that provides powerful computing and large storage environments through the use of the Internet. Cloud computing provides different dynamically scalable computing resources as a service. It brings economic benefits to individuals and businesses that adopt the technology. In theory adoption of cloud computing redu...

Cloud computing is a recent computing paradigm that represents a fundamental change of information commu- nication technology (ICT) services and Cloud services continue to grow rapidly with increasing functionality and more users. As a result of this growth, it is a critical issue to select a suitable Cloud service which meets all the business strategies and the objectives of firms. This paper ...

A major threat to cloud infrastructure network is distributed denial of service (DDoS) attacks. It makes the resources unavailable for its anticipated users, which can be accomplished through malicious virtual machines (VMs) in a hypervisor layer of cloud datacenter. Less protection in VMs leads to DDoS attacks on cloud environment. Traditional approaches used data flow based method, but that i...

The dense molecular cloud cores that form stars, like other self-gravitating objects, undergo bulk oscillations. Just at the point of gravitational instability, their fundamental oscillation mode has zero frequency. We study, using perturbation theory, the evolution of a spherical cloud that possesses such a frozen mode. We find that the cloud undergoes a prolonged epoch of subsonic, accelerati...

CLOUD computing has emerged as a disruptive technology andnew computing paradigm inwhich IT resources (hardware, software, applications, data storage, computing capacity, etc.) are provided as services over the Internet, through “everything-as-a-service”. It builds on the foundations of distributed computing, grid computing, virtualization, service orientation, etc. Cloud storage, which is one ...

Firstly in the paper, it raised a comprehensive evaluation method of the digital image map quality estimation based on cloud model using the mapping between qualitative and quantitative knowledge of the cloud mode. Then it calculated the cloud parameters of each quality element using the theory of virtual cloud. After calculated the finally cloud’s parameter, it described the finally digital im...