abstract efficacy of encouraging and punishing policies of government in different markets is related to market power. study of market behavior is also important for efficient structuring of tools such as commodity exchanges and cooperatives. in this study, market power structure of pistachio domestic market in iran was investigated. sample was 343 pistachio producers and 252 pistachio traders ...

Image hashing allows compression, enhancement or other signal processing operations on digital images which are usually acceptable manipulations. Whereas, cryptographic hash functions are very sensitive to even single bit changes in image. Image hashing is a sum of important quality features in quantized form. In this paper, we proposed a novel image hashing algorithm for authentication which i...

This paper presents a new islanding detection method based on the difference of the power transfer angle between the distributed generation and local load. After islanding, current id and iq will be changed by adding the variation to d_q transformation block of current. This makes voltage and frequency disturbance and therefore islanding is recognized. Active islanding detection method usually ...

the dabuyids is a local dynasty who managed to dominate over an area known as padashwargar for more than a century. they came to power when on the one hand the sassanid empire was on the decline, and on the other hand the arab invasion had become irresistible. however, the dabuyids managed to take root in such circumstances and survive powerfully for a long time. the dabuyids even remained aliv...

reactive power management plays an essential role in the secure operation of the power system as an ancillary service. although in electricity markets, the particular attention is paid to active power, the reactive power also plays an important on total generation costs of electricity. on the other hand, as it is mainly confined to local consumption, to avoid market power and maintain the secur...

mohammed, north, and ashton find that decentralization in fiji shifted health-sector workloads from tertiary hospitals to peripheral health centres, but with little transfer of administrative authority from the centre. decisionmaking in five functional areas analysed remains highly centralized. they surmise that the benefits of decentralization in terms of services and outcomes will be limited....

Discriminative latent-variable models are typically learned using EM or gradient-based optimization, which suffer from local optima. In this paper, we develop a new computationally efficient and provably consistent estimator for a mixture of linear regressions, a simple instance of a discriminative latentvariable model. Our approach relies on a lowrank linear regression to recover a symmetric t...

Controlling power flow and achieving appropriate matching between power sources and loads according to the quality of energy is expected to be one of the approaches to reduce wasted energy consumption. A power router, proposed recently, has the capability of realizing circuit switching in a power distribution network. This study focuses on the feasibility of an AC power routing network system c...