The knowledge related to the methodology of the FIELD trial study as a type of intervention studies, yet for many of our researchers is not fully understood. The aim of the current study was a better understanding of conducting this type of research. FIELD trial studies are done on healthy individuals and aim to prevent. These types of studies such as clinical trials are performed on both individual and collective levels. One type of these studies is Community Intervention Trial which is usually done on a large scale population. FIELD trial study should be carried out in stages, such as the formulation of hypotheses, selection of the population (reference population, study population, and sampling), measuring the baseline variables (before conducting preventive intervention), random allocation of subjects to intervention and control groups, doing interventions and measuring outcome. The methodology of FIELD trial studies is very similar to clinical trials. The difference is that FIELD trials are conducted on healthy individuals and aim to prevent and also the sample size required to this type of study is relatively more, and these studies are usually time consuming and costly.

Sarvak Formation as the oil reservoir with the most hydrocarbon POTENTIAL in Yaran oil FIELD is of special importance. The present research was conducted to study the reservoir parameters of this Formation. For this purpose, petro-physical crude data was first prepared and using the Geolog6. 7 software, a petro physical plot was drawn. Afterward, petro-physical properties of reservoir were done by modeling and using cross plots and logs, including porosity, permeability, lithology type, shale volume, water saturation and fractures analysis were investigated. Finally, with the adaptation of petro-physical parameters and other geological assessments from drilling cores, reservoir zoning and reservoir quality was analyzed. The obtained results showed that in the studied well there is a depth of 2600 to 2693 m of hydrocarbon POTENTIAL friends. Effective porosity of the Sarvak Formation varies from 10 to 15%. Moreover, all of the investigated methods present of the prevailing lithology Carbonate, which can be on some outcrops of the shale layers, which has led to a decrease in reservoir quality in other zones.

POTENTIAL FIELD anomalies are usually superposed large-scale structures and small-scale structures anomalies. Separation of these two categories of anomalies is the most important step in the data interpretation. Different methods have been introduced for these types of works, but most of them are the semi-automatic methods. In this paper, empirical mode decomposition method is used to differentiate regional and residual anomalies. This automatic method is based on extraction of the intrinsic oscillatory modes of data. Efficiency of this method is investigated on both synthetic and real data acquired on Tromspberg area of South Africa. Different results show that this technique have higher accuracy than conventional methods like as polynomial fitting.

Imaging and inversion of POTENTIAL FIELD geophysics data permit the estimation of the source-property distribution in2D/3D space. In this work, the advantages and performances of a fast gradient-based imaging technique, known as the normalized full gradient (NFG), are examined to depict the source distribution in 2D space. In addition, a conventional Tikhonov norm-based inversion technique is used to estimate physical properties in 3D space. The functionality of these approaches are evaluated first for synthetic data sets, which involve three scenarios of a single source, a sloping source and a combination of them. Where the constructed sources and property distributions (i. e. density contrast and magnetic susceptibility) were compared. Then, algorithms were employed to the POTENTIAL FIELD data pertaining to the Shavaz iron-bearing deposit in Iran. Both methods have shown accurately the centroid depth of all sources, but the boundary is better preserved by the inversion method for simulated sources and the real data set. Iron ore occurrence is in the forms of hematite and magnetite lens which mainly has an elongation along a NW-SE strike, indicating the impact of the Dehshir-Baft fault on trapping the iron. It is worth pointing out that the inversion method led to more accurate information on geometry of the sought source by estimating density contrast and magnetic susceptibility values, but with higher execution time. In addition, the NFG algorithm took less time to run, more sensitive to noisy data, and severely smeared-out the border of the source responsible for POTENTIAL FIELD anomaly.

Summary:POTENTIAL FIELD images obtained in POTENTIAL FIELD data measurements are appropriate tools to explore mineral and hydrocarbon resources. These images consist of different anomalies which in many cases are contaminated with noise. The horizontal location of the boundaries of the POTENTIAL FIELD anomaly sources is a frequently requested job in POTENTIAL FIELD interpretations. However, the edge of the POTENTIAL FIELD sources is not clear-cut as the anomaly shape is not of enough resolution with respect to the shape of their sources.Edge enhancement in POTENTIAL FIELD data helps geologic interpretations and investigating the structural setting of a region as well as environmental and engineering applications. Edge enhancement is a procedure, applied to the POTENTIAL FIELD data to produce regions of constant FIELD amplitude separated by sharp boundaries as an aid to the interpretation.There are many methods to enhance the edges of POTENTIAL anomalies, most of which are high-pass filters based on the horizontal or vertical derivatives of the FIELD. Vertical derivatives have been used for many years to enhance the measured gravity FIELD.  Measures of the local phases of the POTENTIAL FIELDs can be a useful aid to edge detection. An alternative approach to the conventional phase filter is the tilt angle. The tilt angle is the ratio of the first vertical derivative to the horizontal gradient and is effective in balancing the amplitudes of the different anomalies, but it is not primarily an edgedetection filter. The total horizontal derivative of the tilt angle (THDR) successfully delineates the edges of the largest amplitude anomaly, but its results for the deeper bodies are less impressive. The most interesting characteristic of all these methods is that it is possible to get quantitative results on gridded data with only a few assumptions. One of the main limitations to making a good estimate of the boundary position of a source are interference effects caused by nearby sources, especially when they are deep-seated. Comparing different filters in order to detect the local phase edges, Pilkington and Keating (2004) showed that these filters cannot enhance all of the parameters of discontinuities.The theta-map method is presented here as a high-resolution boundary-analysis technique. Theta is the angle between the analytical signal and its horizontal component. The theta map uses the analytic signal amplitude to normalize the total horizontal derivative. This filter enhances the edges of anomalies of all azimuths.We tested the efficiency of this method on both synthetic and real data. We selected two nearby sources with different depths as a synthetic model. We also tested the method against gravity data over Trompsburg complex located in the Free State Province, South Africa. Trompsburg Complex is roughly circular in shape, a layered mafic intrusion, with a diameter of nearly 50 km.Results show that the theta-map method can enhance the edge of a deeper anomaly better than the tilt-angle or the total horizontal derivative of the tilt angle methods. Also, the anomalies edge detection by the theta-map method is more accurate than the two other methods. This method has a better resolution than two the other mentioned methods.

Introduction: Musculoskeletal problems are the common complaints of patients refer to internal medicine clinics and the pain is the most important of them. There are different physiotherapy methods for reduction of pain and action POTENTIAL simulation therapy (APS therapy) is one of newest methods. The aim of this study was to determine reduction of pain with APS therapy. Materials & Methods: In 47 patients with different musculoskeletal pain APS therapy performed in 6 days each for 16 minutes and with current of 0.7-1.2 mA. Pain (VAS), Global functional status (ACR) and relief of pain (VAS) before and after study compared.Results: APS therapy reduced pain (p<0.001) and increased Global functional status (p<0.001) and increased relief of pain (p<0.005) but there was not any correlation between this reduction of pain with APS therapy and educational status and past history of physiotherapy and duration of illness in these patients.Conclusion: APS therapy is a useful physiotherapy modality for reduction of pain in musculoskeletal problems.

POTENTIAL FIELDs are due to complex distribution of sources related to susceptibility and mass density variations for magnetic and gravity FIELD respectively. In researching the lateral heterogeneous of different geological bodies, in particular their edge location POTENTIAL FIELD has some advantages. We mainly refer to linear features such as fault, folding axis, dyke, trend and border of the geological units as well as to circular featurs such as crates and buried voids when mentioning geological bodies.Usually, the edge detection and edge enhancement techniques are used to distinguish between geological bodies with different depths and sizes. Edge detection methods are based on the position of the maximum or zero-crossing points associated with vertical derivative, horizontal derivative and analytic signal filters. These methods which are famed to derivative-based filters use different orders, but some instability may occur in high-order derivatives since any kind of noise or non-harmonic signal will be correspondingly enhanced with desired signals simultaneously. Another difficulty is that in the filtered image, the smaller amplitude features (which may be of considerable importance) may be hard to discern.Other edge detection methods are local phase filters (edge enhancement methods) based on the phase variation of the derivative quantities. The advantage of these filters is their flexibility to produce new filters with most applicability just with partial variation. The edge enhancement methods mainly include Tilt angle (TA), Total Horizontal derivative of the tilt angle (THDR), theta map, Hyperbolic Tilt Angle (HTA) and normalized horizontal derivative.The tilt angle filter did not serve as a very accurate method of locating deep sources. A much improved result came from using the second vertical derivative of the tilt angle in the space domain. Equations (1) to (4) are the local phase filters.T=tan-1[¶f/¶z/Ö[¶f/¶x]2+[¶f/¶y]2]THDR=Ö(¶T/¶x)2+(¶T/¶y)2Theta=cos-1[Ö(¶f/¶x)2+(¶f/¶y)2 / Ö(¶f/¶x)2+(¶f/¶y)2+(¶f/¶z)2]HTA=Â[tanh-1[¶f/¶z/Ö(¶f/¶x)2+(¶f/¶y)2]]Where, f is POTENTIAL FIELD data, T is tilt angle and x, y, z are three Cartesian components, in the above equation Á denote real part of function.In this paper we applied these filters on synthetic magnetic data from a cylinder model as well as on real magnetic data from the Abadeh quadrangle. According to the obtained results the Dehshir-Baft fault in the northeast of the studied and ophiolite outcrops in the southeast are enhanced.