Introduction: Carney Complex is an autosomal dominant syndrome that is defined with different tumors including myxoma in different organs, endocrine tumors and lentiginosis lesions. This is the first case report of this syndrome from Iran.Case: The patient is a 27 year old girl, referred with flank pain. Physical examination revealed hirsutism, truncal obesity, hyperpigmantasion and hypertension; Cushing's syndrome was suggested and confirmed with related classic biochemical tests. She had history of cardiac myxoma during her childhood and had been operated twice.Pituitary microadenoma and right adrenal adenoma were reported on MRI and CT-scan, respectively. Initially laparascopic right adrenalectomy was done; as expected, no remission in signs of Cushing's syndrome was observed after surgery. By laparoscopic adrenalectomy of the other site, Cushing's syndrome resolved. Pathologic report of 1st operation was adrenal adenoma with surrounding pigmented micronodular hyperplasia and of the 2nd one was just pigmented micronodular hyperplasia.Conclusion: We have reported a patient with Carney syndrome along with Cushing's syndrome due to bilateral adrenal hyperplasia and an adenoma in contralateral adrenal and microadenoma of the pituitary as an incidentaloma. This is a new presentation of Carney syndrome.

Electrical Resistivity techniques are well-established and applicable to a wide range of geophysical problems. 2D Resistivity measurements can give information about both the lateral and vertical variations of the subsurface Resistivity and can be used in a qualitative fashion for the identification of the structure and depth of masses. The Resistivity inverse problem involves constructing an estimate of a subsurface Resistivity distribution, which is consistent with the experimental data. This is a fully non-linear problem and its treatment involves iterative full matrix inversion algorithms, which can give good quality results. The back-projection Resistivity technique (BPRT) can be applied to a set of apparent Resistivity measures to quickly obtain an approximate image of the Resistivity distribution of the investigated volume. This technique is based on the consideration that a Resistivity perturbation in a point element (voxel) of a bounded region produces a change in voltage thus an apparent Resistivity anomaly at the surface of the region, according to a sensitivity coefficient. The value of the coefficient is dependent on the position of the voxel considered in respect of both the current and the voltage dipoles, in agreement with the sensitivity theorem of Geselowitz. This consideration suggests that it is possible to correlate all the measured Resistivity values, weighted by the appropriate sensitivity coefficients to each voxel of the investigated volume and to estimate the Resistivity value of each cell of the model using a weighted summation of the apparent Resistivity measurements. The BPRT considering a two-step approach. Initially, a damped least squares solution is obtained after a full matrix inversion of the linearized geoelectrical problem. Furthermore, on the basis of the results, a subsequent filtering algorithm is applied to the Jacobian matrix, aiming at reducing smoothness, and the linearized damped least square inversion is repeated to get the final result. This fast imaging technique aims at increasing the Resistivity contrasts, and practically, since it does not require a parameter set optimization, it can be used to easily obtain fast and preliminary results. The procedure proposed in this work consists of four steps: (1) Evaluation of sensitivity matrix B, (2) Inversion of matrix B using a damped LSQR solution, (3) Recalculation of a filtered Jacobian matrix B‘ obtained by means of a correlation filter, (4) Inversion of the filtered sensitivity matrix. The proposed technique is tested on Resistivity synthetic data from the Schlumberger, Wenner, Dipole-dipole and Pole-pole arrays, the objective of which is to find the optimal parameter set. The synthetic tests carried out with 2D data suggested that a good compromise for 2D inversions is to choose 𝜆 for the Schlumberger, Wenner, Dipole-dipole and Pole-pole arrays, 0. 1, 20, 1 and 0. 5, respectively. Furthermore, all the synthetic tests carried out with 2D data suggested that a good compromise for 2D inversions is to choose 𝜒 ≈ 5. The approximate images using the BPRT inverse modeling for all synthetic data, with and without random noise, is compared with the least square inversion by RES2DINV software. Finally, a field case is discussed, and the comparison between the back-projection and inversion is shown.

The Resistivity (r) data for RFeAsO compounds (R=Ce, Pr, Nd, Sm), in the temperature (T) range 35–315 K have been analyzed to identify the dominant scattering mechanisms. Close to the room temperature, the system appears to be a metal with low electron density, and the electron–phonon scattering is the dominant one. At lower temperatures, electron–electron scattering plays an important role. In an intermediate temperature region, unlike metallic system, dr/dT is negative; and r-1 varies as lnT as in a state of weak localization. We look into the origin of negative dr/dT. The analysis of r (T) data below the SDW transition temperature shows the presence of electron–electron interaction in addition to a SDW energy gap, and also gives an estimate of the SDW energy gap.

One of the main factors of premature deterioration of concrete structures is the corrosion of reinforcements. Chloride penetration of concrete is one of the main reasons of this phenomenon. Therefore, to have durable structure, it is necessary to have concretes with low permeability. There are various methods to evaluate permeability of concrete. Finding a relationship between them can be useful for understanding the mechanism of corrosion. Concrete Resistivity test is a suitable indicator for concrete penetration and chloride ion permeability. It is a non-destructive, simple, rapid and cheep method that can also be used in site. In this study, various permeability and Resistivity tests were carried out on different types of concrete to find a relationship between them. In addition, the main factors affected the Resistivity are disgusted and the major constraints of relation between Resistivity and permeability of concrete are illustrated. Finally, a new method is recommended to eliminate these problems.