Showing papers by "Azarbaijan Shahid Madani University published in 2012"
TL;DR: In this paper, the notion of -contractive multifunctions was introduced and a fixed-point result for self-maps in complete metric spaces satisfying a contractive condition was obtained.
Abstract: Recently Samet, Vetro and Vetro introduced the notion of α-ψ-contractive type mappings and established some fixed point theorems in complete metric spaces. In this paper, we introduce the notion of -contractive multifunctions and give a fixed point result for these multifunctions. We also obtain a fixed point result for self-maps in complete metric spaces satisfying a contractive condition.
160 citations
TL;DR: In this article, a statistical signal processing technique known as Independent Component Analysis (ICA) for fault detection and diagnosis in the real Turbine system (V94.2 model) is suggested.
94 citations
TL;DR: In this article, a cascaded transformer reduced switches inverter (CTRSI) is proposed for multilevel inverters, which consists of one DC source and several single-phase transformers.
Abstract: This study presents a novel topology for multilevel inverters so called cascaded transformer reduced switches inverter (CTRSI). This topology consists of one DC source and several single-phase transformers. Each single-phase transformers generates three levels with two semiconductor switches and only two switches for all transformers alter the direction of single DC source. Whereas each single-phase transformers in conventional cascaded transformer multilevel inverter includes four switches. Hence, CTRSI has the advantage of a reduced number of components compared with conventional cascaded transformer multilevel inverter. Simulation results carried out by MATLAB/SIMULINK and a low-power experimental setup was planned to test the converter in practice. The results show that the proposed inverter topology is able to reach high-quality output voltages. Using switches with higher rating current than conventional topology is main disadvantage of CTRSI.
84 citations
TL;DR: A green and efficient one-pot, four-component synthesis of methyl 6-amino-5-cyano-4-aryl-2,4-dihydropyrano[2,3-c]pyrazole-3-carboxylates in water is described in this paper.
76 citations
TL;DR: In this paper, the Friedmann equation was derived as a differential equation for the function f (T) in spatially flat universe and obtained the real valued solutions of this equation for some power-law solutions.
Abstract: We have considered an action of the form T + f (T) + Lm describing Einstein’s gravity plus a function of the torsion scalar. By considering an exact power-law solution we have obtained the Friedmann equation as a differential equation for the function f (T) in spatially flat universe and obtained the real valued solutions of this equation for some power-law solutions. We have also studied the power-law solutions when the universe enters a Phantom phase and shown that such solutions may exist for some f (T) solutions.
39 citations
TL;DR: In this paper, the results of adding nanoparticles (spherical shape Al 2 O 3 with a diameter of 20nm) to silicone oil as a base fluid in a floating zone with aspect ratio equal to unity have been reported.
31 citations
TL;DR: The numerical results reveal that the ES shock density profiles strongly depend on the plasma number density and composition (the atomic-number) parameters, and ion density perturbations propagate with Mach numbers which significantly depends on the studied plasma fractional parameters.
Abstract: We present a generalized nonlinear theory for large-amplitude electrostatic (ES) ion shocks in collisional quantum plasmas composed of mildly coupled degenerate electron fluid of arbitrary degeneracy and nondegenerate strongly correlated ion fluid with arbitrary atomic number. For our purposes, we use the inertialess electron momentum equation including the electrostatic force, pressure gradient, and relevant quantum forces, as well as a generalized viscoelastic ion momentum (GVIM) equation for strongly correlated nondegenerate ions. The ion continuity equation, in the quasineutral approximation, then closes our nonlinear system of equations. When the electric field force is eliminated from the GVIM equation by using the inertialess electron momentum equation, we then obtain a GVIM and ion continuity equations, which exhibit nonlinear couplings between the ion number density and the ion fluid velocity. The pair of nonlinear equations is numerically solved to study the dynamics of arbitrarily-large-amplitude planar and nonplanar ES shocks arising from a balance between harmonic generation nonlinearities and the ion fluid viscosity for a wide range of plasma mass densities and ion atomic numbers that are relevant for the cores of giant planets (viz., Jupiter) and compact stars (viz., white dwarfs). Our numerical results reveal that the ES shock density profiles strongly depend on the plasma number density and composition (the atomic-number) parameters. Furthermore, ion density perturbations propagate with Mach numbers which significantly depend on the studied plasma fractional parameters. It is concluded that the dynamics of the ES shocks in the superdense degenerate plasma is quite different in the core of a white dwarf star from that in the lower density crust region.
29 citations
TL;DR: Nanostructured nickel-aluminum-zirconium ternary layered double hydroxide was successfully applied as a solid-phase extraction sorbent for the separation and pre-concentration of trace levels of iodate in food, environmental and biological samples.
Abstract: Nanostructured nickel-aluminum-zirconium ternary layered double hydroxide was successfully applied as a solid-phase extraction sorbent for the separation and pre-concentration of trace levels of iodate in food, environmental and biological samples. An indirect method was used for monitoring of the extracted iodate ions. The method is based on the reaction of the iodate with iodide in acidic solution to produce iodine, which can be spectrophotometrically monitored at 352 nm. The absorbance is directly proportional to the concentration of iodate in the sample. The effect of several parameters such as pH, sample flow rate, amount of nanosorbent, elution conditions, sample volume, and coexisting ions on the recovery was investigated. In the optimum experimental conditions, the limit of detection (3s) and enrichment factor were 0.12 μg mL−1 and 20, respectively. The calibration graph using the preconcentration system was linear in the range of 0.2–2.8 μg mL−1 with a correlation coefficient of 0.998. In order to validate the presented method, a certified reference material, NIST SRM 1549, was also analyzed.
29 citations
TL;DR: In this paper, the GNR field effect transistors with p + -type source and drain in the presence of a gate voltage-induced n -type channel using the non-equilibrium Green's function formalism were numerically investigated.
Abstract: The electron-hole symmetry characteristic of graphene nanoribbons (GNRs) gives rise to the electron (hole) tunneling through valence (conduction) band states. By employing this property we have numerically investigated GNR field effect transistors with p + -type source and drain in the presence of a gate voltage-induced n -type channel using the non-equilibrium Green's function formalism. For long channels, the traditional FET-like I-V behavior is achieved, but at short channels, the sub threshold current opens up an oscillatory dependence on the gate voltage with a considerable amount of current of over 10 −6 A. This is the characteristic current behavior of resonant tunneling transistors that exhibit regions of negative differential resistance. The calculated discrete density of states in the channel attributes this behavior to the constructed n-type channel island between p-type source and drain with thin barriers formed by the energy gap.
28 citations
TL;DR: In this article, the correction terms for temperature, entropy, and heat capacity of the Schwarzschild black hole were obtained from commutation relations in the framework of Modified Generalized Uncertainty Principle suggested by Doubly Special Relativity.
Abstract: We study the black hole thermodynamics and obtain the correction terms for temperature, entropy, and heat capacity of the Schwarzschild black hole, resulting from the commutation relations in the framework of Modified Generalized Uncertainty Principle suggested by Doubly Special Relativity.
20 citations
TL;DR: In this article, a new configuration of multicell converters is presented, in which the number of high-frequency switches is decreased while the voltage ratings of them during a full cycle are kept constant.
Abstract: Multilevel converters are very interesting alternatives for medium and high-power applications. This study presents a new configuration of multicell converters. The main advantages of the proposed converter, in comparison with conventional flying capacitor multicell (FCM) and stacked multicell (SM) converters, are doubling the number of output voltage levels and the root mean square (RMS), improving the output voltage frequency spectrum and lowering the number and rating of components and decreasing the converter losses. Furthermore, the stored energy and rating of flying capacitors will be decreased to half in this topology in comparison with FCM and SM converters. These improvements are achieved by adding only four low-frequency switches to the conventional SM converters configuration. In this topology, the number of high-frequency switches is decreased while the voltage ratings of them during a full cycle are kept constant. Also, a modified phase shifted pulse-width-modulation-based control method has been applied to the proposed topology, which can decrease the harmonic distortions and THD. The circuit is simulated using PSCAD/EMTDC software and simulation results are presented to validate the effectiveness and advantages of the proposed configuration. In addition, the experimental results of proposed configuration prototype have been presented to examine its practicability.
TL;DR: Dringer's desirability function was used for simultaneous optimization of mass rearing of tobacco budworm, H. armigera, on a modified artificial diet and Taguchi orthogonal array facilitated a systematic mathematical approach with a few well-defined experimental sets.
Abstract: With the aim to improve the mass rearing feasibility of tobacco budworm, Helicoverpa armigera Hubner (Lepidoptera: Noctuidae), design of experimental methodology using Taguchi orthogonal array was applied. To do so, the effect of 16 ingredients of an artificial diet including bean, wheat germ powder, Nipagin, ascorbic acid, formaldehyde, oil, agar, distilled water, ascorbate, yeast, chloramphenicol, benomyl, penicillin, temperature, humidity, and container size on some biological characteristics of H. armigera was evaluated. The selected 16 factors were considered at two levels (32 experiments) in the experimental design. Among the selected factors, penicillin, container size, formaldehyde, chloramphenicol, wheat germ powder, and agar showed significant effect on the mass rearing performance. Derringer's desirability function was used for simultaneous optimization of mass rearing of tobacco budworm, H. armigera, on a modified artificial diet. Derived optimum operating conditions obtained by Derringer's desirability function and Taguchi methodology decreased larval period from 19 to 15.5 days (18.42 % improvement), decreased the pupal period from 12.29 to 11 days (10.49 % improvement), increased the longevity of adults from 14.51 to 21 days (44.72 % improvement), increased the number of eggs/female from 211.21 to 260, and increased egg hatchability from 54.2% to 72% (32.84 % improvement). The proposed method facilitated a systematic mathematical approach with a few well-defined experimental sets.
01 Jan 2012
TL;DR: There were no significant differences between strains at the lowest concentration in all exposure times and H. bacteriophora IRA10 was more pathogenic against cotton bollworm compared to S. feltiae and S. carpocapsae.
Abstract: The insecticidal effect of Heterorhabditis bacteriophora Poinar (Rhabditida: Nematoda: Heterorhabditidae), Steinernema carpocapsae (Weiser) and Steinernema feltiae (Filipjev) (Rhabditida: Nematoda: Steinernematidae), was examined against Helicoverpa armigera under laboratory conditions. The nematodes were used in the following doses: 0 (control), 1, 10, 50, 100 and 500 infective juveniles (IJs) per insect, and their infectivity was tested at 22° C after 72, 96 and 120 h. of exposure using three methods of filter paper assay, food assay and soil assay. In all trials, H. bacteriophora IRA10 had the highest toxicity and S. carpocapsae IRA18 the lowest. There were no significant differences between strains at the lowest concentration in all exposure times. In filter paper assay, a dose of 500IJ/Larvae of H. bacteriophora IRA10 after 120h of exposure time caused 83% mortality, whereas S. feltiae IRA24 and S. carpocapsae IRA18 caused 71.67%and 30% mortality, respectively. In food and soil assay, similar results were found and H. bacteriophora IRA10 was more pathogenic against cotton bollworm compared to S. feltiae and S. carpocapsae.
TL;DR: In this article, the authors considered a multidimensional cosmological model with FRW type metric having 4-dimensional space-time and d-dimensional Ricci-flat internal space sectors with a higher dimension.
Abstract: We consider a multidimensional cosmological model with FRW type metric having 4-dimensional space-time and d-dimensional Ricci-flat internal space sectors with a higher dimensional cosmological constant. We study the classical cosmology in commutative and GUP cases and obtain the corresponding exact solutions for negative and positive cosmological constants. It is shown that for negative cosmological constant, the commutative and GUP cases result in finite size universes with smaller size and longer ages, and larger size and shorter age, respectively. For positive cosmological constant, the commutative and GUP cases result in infinite size universes having late time accelerating behavior in good agreement with current observations. The accelerating phase starts in the GUP case sooner than the commutative case. In both commutative and GUP cases, and for both negative and positive cosmological constants, the internal space is stabilized to the sub-Planck size, at least within the present age of the universe. Then, we study the quantum cosmology by deriving the Wheeler-DeWitt equation, and obtain the exact solutions in the commutative case and the perturbative solutions in GUP case, to first order in the GUP small parameter, for both negative and positive cosmological constants. It is shown that good correspondence exists between the classical and quantum solutions.
TL;DR: In this article, a sensitive hydrogen peroxide (H2O2) biosensor was developed based on a reduced graphene oxide|carbon ceramic electrode (RGO|CCE) modified with cadmium sulfide-hemoglobin (CdS-Hb).
Abstract: A sensitive hydrogen peroxide (H2O2) biosensor was developed based on a reduced graphene oxide|carbon ceramic electrode (RGO|CCE) modified with cadmium sulfide-hemoglobin (CdS-Hb). The electron transfer kinetics of Hb were promoted due to the synergetic function of RGO and CdS nanoparticles. The transfer coefficient (α) and the heterogeneous electron transfer rate constant (ks) were calculated to be 0.54 and 2.6 s−1, respectively, indicating a great facilitation achieved in the electron transfer between Hb and the electrode surface. The biosensor showed a good linear response to the reduction of H2O2 over the concentration range of 2–240 µM with a detection limit of 0.24 µM (S/N=3) and a sensitivity of 1.056 µA µM−1 cm−2. The high surface coverage of the CdS-Hb modified RGO|CCE (1.04×10−8 mol cm−2) and a smaller value of the apparent MichaelisMenten constant (0.24 mM) confirmed excellent loading of Hb and high affinity of the biosensor for hydrogen peroxide.
Journal Article•
TL;DR: A full Newton step infeasible interior-point algorithm based on the classic logarithmical barrier function and a specific kernel function is introduced, and the feasibility step is induced by this kernel function instead of theclassic logarital barrier function.
Abstract: In this paper, we first present a brief infeasible interior-point method with full-Newton step for solving linear complementarity problem (LCP). The main iteration consists of a feasibility step and several centrality steps. First we present a full Newton step infeasible interior-point algorithm based on the classic logarithmical barrier function. After that a specific kernel function is introduced. Then the feasibility step is induced by this kernel function instead of the classic logarithmical barrier function. The results of complexity coincides with the best bound known for infeasible interior-point methods for LCP.
TL;DR: In this article, a 12-bit current-steering binary-weighted digital-to-analog converter (DAC) based on nanoampere bits is designed and modified for high-definition television (HDTV) applications.
Abstract: In this paper, a novel 12-bit current-steering binary-weighted digital-to-analog converter (DAC) based on nanoampere bits is designed and modified for high-definition television (HDTV) applications. As a part of a widely used consumer appliance, it is aimed to be such designed to consume power as low as possible. Hence, as a distinguished idea, prime concentration is focused on the reduction of the currents providing the bits of the proposed DAC. To do this, current mirrors operating in the weak inversion region are arranged to establish the least significant bit (LSB) current as low as 10 nA while the power supply is also reduced to 1 V, resulting to an ultralow power of 52.9 μW. Many other powerful ideas are then deliberately combined to maintain both high speed and very low glitches required for HDTV application despite those ultralow currents and power. The result is a speed of 100 MS/s, an ultralow glitch of ≃10.91 fAs, |INL| ≤ 0.988 LSB, |DNL| ≤ 0.99 LSB, and a spurious-free dynamic range of ≃73 dB. These results caused the proposed DAC to execute a distinguished overall performance (defined as figure of merit) greatly better than some other advanced ones by outstanding ratios of 77 to 277,185. Hspice simulations with the SMIC 0.18-μm complementary metal-oxide semiconductor technology have been used to validate the proposed circuit. Performance evaluation of the proposed DAC versus Monte Carlo simulations and also a wide range of temperature variations proved both its well mismatch insensitivity and thermal stability.
TL;DR: In this paper, a task-specific ionic liquid, N 3, was used as an effective catalyst and reaction medium for the direct oxidative esterification of arylaldehydes with alcohols.
Journal Article•
TL;DR: In this paper, the optimal design of supplementary controller parameters of a unified power flow controller (UPFC) to damp low-frequency oscillations in a weakly connected system is investigated.
Abstract: In this paper, the optimal design of supplementary controller parameters of a unified power flow controller (UPFC) to damp low-frequency oscillations in a weakly connected system is investigated. The individual design of the UPFC controller, using the imperialist competitive algorithm (ICA) technique over a wide range of operating conditions, is discussed. The effectiveness and validity of the proposed controller on damping low-frequency oscillations is tested through a time-domain simulation and eigenvalue analysis under 4 loading conditions and a large disturbance. The simulation results, carried out using MATLAB/Simulink software, reveal that the tuned ICA-based UPFC controller has an excellent capability of damping power system low-frequency oscillations and greatly enhances the dynamic stability of the power systems.
TL;DR: In this paper, the classical r-matrices of two-and three-dimensional Lie superbialgebras were obtained and the Sklyanin superbracket was used to obtain the super Poisson structures on the related Poisson-Lie supergroups.
Abstract: We obtain the classical r-matrices of two- and three-dimensional Lie superbialgebras. We thus classify all two- and three-dimensional coboundary Lie superbialgebras and their types (triangular, quasitriangular, or factorable). Using the Sklyanin superbracket, we then obtain the super Poisson structures on the related Poisson-Lie supergroups.
TL;DR: The electromagnetic beam reflection from layered structures that include the so-called ε-negative and the μ-negative materials, also called single negative materials, is studied and it is shown that the Goos-Hänchen shift can be positive and negative depending on the type of this layer, which can support TE or TM surface waves.
Abstract: We study the electromagnetic beam reflection from layered structures that include the so-called e-negative and the μ-negative materials, also called single negative materials. We predict that such structures can demonstrate a giant lateral Goos-Hanchen shift of the resonant excitation of surface waves at the interface between the conventional and single negative materials, as well as due to the excitation of leaky modes in the layered structures. Then we replace the conventional layer with a left-handed layer (a material with both e<0 and μ<0). We show that the Goos-Hanchen shift can be positive and negative depending on the type of this layer (conventional or LH material), which can support TE or TM surface waves.
TL;DR: The operational Adomian–Tau method is extended with Pade approximant for the numerical solution of non-linear Fredholm integro-differential equations with unknown solution determined by using computational aspects of these matrices.
TL;DR: In this article, the authors measured the phase change imposed by the refractive index profile of a single mode optical fiber and used it to calculate the intensity of diffraction fringes versus optical path difference.
Abstract: When a transparent plane-parallel plate is illuminated at a boundary region by a parallel monochromatic beam of light, Fresnel diffraction occurs because of the abrupt change in phase imposed by the finite change in refractive index at the plate boundary. The intensity of the diffraction fringes varies periodically with changes in the optical path difference of the light passing through the plate edge. The optical path difference depends on the incident angle of the light, the refractive index of the plate and surrounding medium, and the wavelength of the light. Plotting the intensity of the diffraction fringes versus optical path difference provides a general phase shift method for phase change measurement, in which the phase shift is made by changing the incident angle. Using this technique we have measured the phase change imposed by the refractive index profile of a single mode optical fiber.
TL;DR: In this paper, the authors studied the classical Euclidean wormholes in the context of extended theories of gravity and constructed a point-like Lagrangian in the flat Friedmann-Robertson-Walker space-time.
Abstract: We study the classical Euclidean wormholes in the context of extended theories of gravity. Without loss of generality, we use the dynamical equivalence between f(\(\tilde R\)) gravity and scalar-tensor theories to construct a pointlike Lagrangian in the flat Friedmann-Robertson-Walker space-time. We first show the dynamical equivalence between the Palatini f(\(\tilde R\)) gravity and the Brans-Dicke theory with a self-interaction potential and then show the dynamical equivalence between the Brans-Dicke theory with a self-interaction potential and the minimally coupled O’Hanlon theory. We show the existence of new Euclidean wormhole solutions for this O’Hanlon theory; in a special case, we find the corresponding form of f(\(\tilde R\)) that has a wormhole solution. For small values of the Ricci scalar, this f(\(\tilde R\)) agrees with the wormhole solution obtained for the higher-order gravity theory \(\tilde R + \varepsilon \tilde R^2 ,\varepsilon < 0\).
01 Jan 2012
TL;DR: In this article, a modification to the homotopy perturbation method for solving linear and non-linear integral equations is presented, which gives an approximate analytic solution to the equations (usually the exact solution of the equations).
Abstract: In this paper, we present a modification to so-called homotopy perturbation method for solving linear and non-linear integral equations. This method gives an approximate analytic solution to the equations (usually the exact solution of the equations). Some numerical examples presented to show the accuracy and efficiency of the method.
TL;DR: In this paper, the propagation of small but finite-amplitude quantum electrostatic shock-wave in an inertial-less symmetric pair (ion) plasma with immobile background positive constituents is considered.
Abstract: In this paper, the quantum hydrodynamics (QHD) model is used to study the propagation of small- but finite-amplitude quantum electrostatic shock-wave in an inertial-less symmetric pair (ion) plasma with immobile background positive constituents. The dispersion due to the quantum tunneling and inertial effects as well as dissipation caused by particle collisions leading to the shock-like or double-layer structures are considered. Investigation of both the stationary and traveling-wave solutions to Kortewege-de Veries-Burgers evolution equation show that critical values exist which govern the type of collective plasma structures. Current analysis apply to diverse kind of symmetric plasmas such as laboratory inertially confined or astrophysical pair-ion or electron-positron degenerate plasmas.
TL;DR: In this article, a multidimensional cosmological model with FRW type metric having 4-dimensional space-time and $d$-dimensional Ricci-flat internal space sectors with a higher dimension was considered.
Abstract: We consider a multidimensional cosmological model with FRW type metric having 4-dimensional space-time and $d$-dimensional Ricci-flat internal space sectors with a higher dimensional cosmological constant. We study the classical cosmology in commutative and GUP cases and obtain the corresponding exact solutions for negative and positive cosmological constants. It is shown that for negative cosmological constant, the commutative and GUP cases result in finite size universes with smaller size and longer ages, and larger size and shorter age, respectively. For positive cosmological constant, the commutative and GUP cases result in infinite size universes having late time accelerating behavior in good agreement with current observations. The accelerating phase starts in the GUP case sooner than the commutative case. In both commutative and GUP cases, and for both negative and positive cosmological constants, the internal space is stabilized to the sub-Planck size, at least within the present age of the universe. Then, we study the quantum cosmology by deriving the Wheeler-DeWitt equation, and obtain the exact solutions in the commutative case and the perturbative solutions in GUP case, to first order in the GUP small parameter, for both negative and positive cosmological constants. It is shown that good correspondence exists between the classical and quantum solutions.
01 Dec 2012
TL;DR: In this paper, a new topology without dc-link based on direct ac/ac converter is proposed for shunt active filter (SHAF), which is an effective solution to compensate unbalanced, harmonic and distorted currents and reactive power of the nonlinear and/or asymmetric loads.
Abstract: In this paper, a new topology without dc-link based on direct ac/ac converter is proposed for shunt active filter (SHAF). SHAF is an effective solution to compensate unbalanced, harmonic and distorted currents and reactive power of the non-linear and/or asymmetric loads. Most of SHAF topologies are based on voltage source converters with a relatively large capacitor as dc-link. Dc-link capacitor is a bulky and costly element and makes the control scheme more complicated. Considering unpredictable dynamic condition of utility grid and consumers connected, capacitor voltage will experience oscillations and may leave stability region, which leads to improper operation of SHAF. Elimination of the dc-link capacitor decreases the weight, bulk and cost of the SHAF, makes the control method simpler and the active filter more reliable and effective. The proposed active filter, which is more stable and reliable, has better dynamic behavior and can operate properly under distorted grid voltages and varying load conditions. The applied control strategy in order to generate compensating reference current signals is based on instantaneous power theory. Current modulation is carried out by PI technique. Operation and performance of this new topology has been verified by simulation under various load conditions.
TL;DR: In this article, the conditions for which the no boundary proposal may have a classical realization of a continuous change of signature, are investigated for a cosmological model described by FRW metric coupled with a self-interacting scalar field, having a noncommutative phase space of dynamical variables.
Abstract: The conditions for which the no boundary proposal may have a classical realization of a continuous change of signature, are investigated for a cosmological model described by FRW metric coupled with a self-interacting scalar field, having a noncommutative phase space of dynamical variables. The model is then quantized and a good correspondence is shown between the classical and quantum cosmology indicating that the noncommutativity does not destruct the classical-quantum correspondence. It is also shown that the quantum cosmology supports a signature transition where the bare cosmological constant takes a vast continuous spectrum of negative values. The bounds of bare cosmological constant are limited by the values of noncommutative parameters. Moreover, it turns out that the physical parameters are constrained by the noncommutativity parameters.
Journal Article•
TL;DR: O-LIFE has favorable psychometric properties in the Iranian society and is applicable in psychiatric and psychologic researches as a valid tool.
Abstract: Background The Oxford-Liverpool Inventory of Feelings and Experiences (O-LIFE) is a 104-item tool made based on the factor analysis of 15 available scales to measure schizotypy. This research aims to investigate the psychometric properties of Oxford-Liverpool Inventory of Feelings and Experiences.Materials and Methods Conducted as an ex-post facto survey, this study is a descriptive cross–sectional research. A sample of 482 patients was selected and assessed through stratified random sampling from different faculties of Shahid Madani University of Azarbaijan. Data were analyzed using exploratory factor analysis method by means of the Principal Component Analysis method.Results Factor analysis using the Principal Component Analysis method extracted five principal factors, which were named cognitive disorganization, impulsive nonconformity, unusual experiences/magical thinking, introvertive anhedonia, and isolation. In addition, two other types of validity (concurrency and correlation of subscales with the total scale and each other) and three types of reliability (test-retest, half-splitting, and internal consistency) were reported.Conclusion According to the findings of the present study, O-LIFE has favorable psychometric properties in the Iranian society and is applicable in psychiatric and psychologic researches as a valid tool.