m. rahimi

Concrete is commonly used to shield gamma rays and neutrons. The effectiveness of concrete shielding for neutrons depends on the moisture content in the concrete. Moreover, the strength and durability of concrete structures are influenced by the moisture content in the concrete specimen. Therefore, determination of the moisture content in concrete is very important. The gamma ray attenuation technique is a potentially attractive non-destructive method for determining the concrete moisture content due to its high accuracy and speed. In this study, gamma attenuation in concrete shields of different thicknesses and moisture levels was simulated using the Monte Carlo method. Two separate artificial neural networks (ANN) were trained with simulation data to accurately estimate results and decrease calculation time. The thickness of concrete is predicted in the first ANN. Then, the count in full energy peak and thickness is applied to the second ANN to determine the concrete moisture. The trained neural network can estimate the thickness of concrete with a main relative error (MRE) of 0.42%. The findings indicate that the suggested approach can accurately determine the concrete moisture with an MRE error of 4.6% for test data.

In this research, copper/silver-silicon carbide Cu-Ag-SiC composite was prepared by the friction stir processing (FSP). For this purpose, nanometer and micrometer SiC particles were used as reinforcing particles. In order to evaluate the microstructural properties, X-ray diffraction (XRD) analysis, scanning electron microscope and optical microscope were employed. Evaluation of mechanical properties through microhardness measurement, tensile test and pin on disc test were utilized to evaluate the wear behavior of the composite. The results of X-ray analysis revealed the presence of two phases of CuAg solid solution along with SiC particles, which indicated the formation of Cu-Ag-SiC composite. The addition of nano-particles led to a significant decrease in the intensity of peaks compared to micro-particles. This indicated a decrease in the grain size of the CuAg matrix. Using the FSP in the presence of reinforcing particles and without it led to a decrease in the crystal size and average grain size compared to the sample without FSP. So that the grain size of the sample without FSP and the FSPed sample without reinforcing particles and with nano-reinforcing particles were found to be about 46.3, 19.2 and 3.6 µm, respectively. The wear mechanism in the sample before FSP was adhesive wear due to its soft nature of the matrix, and after FSP in the sample without reinforcing particles, the adhesive wear decreased and due to the addition of silicon carbide micro and nano- particles reinforcement, the wear mechanism in entirely altered to abrasive wear. Overall, it can be stated that the addition of silicon carbide nanoparticles by FSP leads to the fabrication of  Cu-Ag-SiC composite with high mechanical properties.

In this paper, as the main contribution, three sensorless control structures are presented for the control of the grid-connected PMSG-based wind turbine (WT) employing boost converter and diode rectifier as the machine-side converter. Then, detailed control structures of the boost converter and grid-side converter at the three mentioned control strategies are extracted, and next, features of the abovementioned control strategies are investigated and compared against wind speed variation and grid voltage dip. The boost converter, in the first control strategy, controls the generator speed at the MPPT mode, and in the second control strategy, it regulates the PMSG active power to its set point value. Also, the boost converter, in the third control strategy, adjusts the voltage of the dc link capacitor to its set point value. In this paper, steady-state performance and transient/LVRT behavior of the WT system are examined for each mentioned control strategy in the Matlab-Simulink environment. It is shown that WT steady-state responses are relatively identical for all three control strategies. However, as an interesting result, at the fault conditions, the third control strategy has superior performance, and thus, the WT fault ride-through behavior enhances significantly with the third control structure without any hardware protection.

Basil is one of the important plants belonging to the mint family, which is used as a medicinal plant, spice, and also as a fresh vegetable. In order to study the relationship between leaf yield and agricultural traits, 22 basil genotypes were evaluated on the basis of split plot design based on randomized complete block design with three replications in pots under field conditions. The main plot included drought stress in three levels (normal, moderate and severe stress) and the subplot included genotype (22 levels) and agricultural traits were measured. Correlation of traits in all three conditions showed that leaf yield had a positive and significant correlation with the traits of stem fresh weight, number of leaves, length and width of leaves. Considering the leaf yield as a dependent variable and performing a stepwise regression analysis in normal conditions (stem wet weight, number of leaves and leaf width in the first stage, respectively), moderate drought stress conditions (stem dry weight in the first stage) ) and severe drought stress conditions (stem wet weight in the first stage) were entered into the model and the model was significant at the level of 1%. Path analysis showed that stem wet weight in normal conditions, stem dry weight in moderate stress condition and stem wet weight in severe stress condition had the highest direct and positive effect on leaf yield. Therefore, the most important traits as a selection index for improving leaf yield werestem fresh weight, leaf number, leaf length and width, respectively.

Nonfiction is a new type of narrative literature influenced by the praxis of cultural-political discourses in the representation of reality. The dominant discourse seeks to display its desired patterns of action and life, with fictional literature being one of its channels. This study was conducted with the aim to highlight the semantic construction of Afghan immigrant women in the contemporary fictional literature in Afghanistan through the theoretical perspective of Homi K. Bhabha and Theodor W. Adorno. It also aims to identify the representations of these women in the nonfiction literary genre and interpret them according to the cultural context of the destination. To achieve this goal, "Border" from Why Shouldn’t Make Darkness My God? A collection of short stories by Masoumeh Jafari, a contemporary Afghan writer, was selected as the case study. It was analyzed using Seymour Chatman's narrative method in three sections of story, discourse, and ideology to illustrate the concept of Afghan immigrant women from lingual and ideological perspectives. The findings show that the identity of Afghan immigrant women was changed according to the cultural discourse governing the society, leading to identity diffusion (confusion) and their re-immigration to new land rather than their homeland to deal with this crisis. The interruption and cultural interference of the host society with the Afghan immigrant women is represented through the marginal and protesting voice of the author of "Border" to the existing situation and the context of the dominant realities, reflecting the "critical" function and "emancipation" of art in the analysis and criticism of the structures of domination and oppression. 

Investigating the flow pattern developed whitin spaces with relatively large scales that can be caused by forced or natural convection is of particular importance based on which, one can comment on the spread of polluting particles, temperature distribution and thermal comfort conditions. Calculating the developed flow field whitin such spaces using numerical methods, requires relatively large memory and long calculation time. Whereas, suitable zonal methods can predict accurate flow patterns with a very small amount of calculations. In the present research, equations similar to that of one-dimensional flow passing through an orifice, which is known as the zonal power law method, were used to predict the flow between the adjacent cells. These equations along with the mass conservation equation defined for each cell of the domain were solved using an innovative numerical method and the velocity distribution was specified. The 2-D sample domain had 1 m height and two different lengths of 0.5 and 2 m where the air inlet and outlet were considered at different positions. The air velocity at the inlet was 2 m/s. In order to make a better match with the experimental results, variable loss coefficients between the cells were used and significant improvement was found in the results. Despite the comformity made in the velocity distribution, the existence of recirculating flows predicted by the numerical methods could not be obtained using the employed method even with the variable coefficients.

Nowadays, due to the increase in the cases of kidney diseases, the demand for kidney transplant and dialysis is increasing, but unfortunately, no promising results with such methods were achieved, and most importantly, some kidney diseases are not found to be curable, yet. Because of this, new approach of tissue engineering became the starting point for diversifying the types of kidney treatments. In this way, researchers are trying to use scaffolds, especially natural or synthetic hydrogels, which act as extracellular matrices and carriers for mesenchymal stem cells or other therapeutic factors, to cure kidney disease in a quick and permanent way. In this article, new methods and procedures concerning the use of hydrogels in treating kidney diseases were reviewed. Clinical trials conducted in chronic kidney diseases have shown the safety and efficiency of using hydrogels containing one's own epithelial cells, and hopefully, could be used as a new method in the treatment of acute and chronic kidney diseases in the near future.

Easy access to social media enables users to express their opinions and ideology about various topics like news, videos, and personalities freely, without any fear, and often in an offensive manner. It is a vital task to detect comments with offensive language on social media platforms and relies on a complete and comprehensive tagged dataset. Therefore, in this paper, we introduce and make publicly available PerBOLD, a new Persian comment dataset collected from Instagram as a popular platform among Iranian. We follow a two-level manual annotation process in order to determine whether a comment has offensive language or not and fine-grained tags of different types of offensive language. Furthermore, we present some interesting aspects of data and analysis them.

In this paper harmonic resonance analysis of the grid comprising wind power plants (WPPs) with permanent magnet synchronous generators (PMSGs) is presented. Usually, Norton equivalent circuit is used as the wind turbine (WT) model for harmonic resonance studies, in which, WTs are simply modeled as ideal current and voltage sources and impacts of converters controls on the WTs output impedances are neglected. This paper deals with the harmonic resonance analysis of study WPP system taking the impacts of converters controls, and current and voltage measurement filters into account. In this way, harmonic impedance models of the WTs are presented for simple and detailed cases, and then WT harmonic impedance is extracted for the mentioned cases. Next, results of frequency scan and harmonic mode resonance analyses for different cases are given and compared, and then effects of the current and voltage measurements filters and WT converter control on harmonic resonance analysis of the study WPP system are presented. It is shown that increasing the bandwidth of the grid-side converter current control loop can not shift the resonant frequencies, but enhances the system damping, and consequently reduces the driving point impedances in the resonant frequencies.

Finding an effective way to combine the base learners is an essential part of constructing a heterogeneous ensemble of classifiers. In this paper, we propose a framework for heterogeneous ensembles, which investigates using an artificial neural network to learn a nonlinear combination of the base classifiers. In the proposed framework, a set of heterogeneous classifiers are stacked to produce the first-level outputs. Then these outputs are augmented using several combination functions to construct the inputs of the second-level classifier. We conduct a set of extensive experiments on 121 datasets and compare the proposed method with other established and state-of-the-art heterogeneous methods. The results demonstrate that the proposed scheme outperforms many heterogeneous ensembles, and is superior compared to singly tuned classifiers. The proposed method is also compared to several homogeneous ensembles and performs notably better. Our findings suggest that the improvements are even more significant on larger datasets.

Hot corrosion in Na2SO4-V2O5 environment has been regarded as a major challenge in the destruction of thermal barrier coatings (TBCs). The present study introduces a CoNiCrAlY/CSZ+Al2O3+SiC TBC with enhanced resistance to hot corrosion compared to the CSZ. CoNiCrAlY/CSZ+Al2O3+SiC and CoNiCrAlY/CSZ were applied on CoNiCrAlY, as a bond coat to nickel-based superalloy (IN738LC) using the atmospheric plasma spray (APS) technique. Hot corrosion behavior of TBCs was investigated in a cyclic approach (2 hours for each cycle) using Na2SO4-55 wt.% V2O5 salts at 950°C. The findings showed the higher hot corrosion resistance of CoNiCrAlY/CSZ+Al2O3+SiC TBC compared to CoNiCrAlY/CSZ coating system. The transformation of tetragonal zirconia to monoclinic ZrO2 and formation of YVO4 and CeVO4 crystals as hot corrosion products led to the degradation of the mentioned TBCs.

The present study was carried out in order to obtain a suitable micro propagation method of Rosa canina L. as the most important rootstock for roses. The experiment was a factorial based on a completely randomized design with two concentrations of BAP (0, 0.75, 1.5, 2.5 and 3 mg/l) and 2,4-D concentrations (0, 1.5, 2.5, 4 and 5.5 mg/l) were cultured in MS medium (one quarter) in four replicates (each replicate included two samples). Samples were prepared in the middle of the season in the middle part of the middle shoots of the shrubs located in the fruit stage (red), pieces of 1.5 cm after disinfection With 70% ethanol for one minute, 10% sodium hypochlorite for 15 minutes was cultured horizontally and purification under sterile conditions. The room was then kept under a temperature of 23°C to 25°C and a photoperiod of 16 hours of light and eight hours of darkness. After the three months and without any replanting, the experiment was stopped. Results indicated that both the 2,4-D and BAP factors, as well as their interactions, had a very significant effect on all the test characters (height, weights and shoot length, number of leaves, length of stem and number of new bud). The treatment has 1 mg/l 2,4-D plus 2.25 mg/l BAP, is the best treatment of this combination is to increase seedling height, stem length, weigh weight, and shoot weight. The treatment was 2.5 mg/l 2,4-D with concentrations of 0.75 mg/l BAP, the best treatment for increasing height, weight, and the treatment with 2.5 mg/l 2,4-D with concentrations of 1.5 mg/l BAP is the best treatment for increasing weight, leaf number and new bud.

Multigeneration system is one of the solutions to increase the productivity of existing thermal energy sources. In this paper, a novel combined system for simultaneous generation of power and fresh water by using a constant temperature heat source such as a nuclear reactor is introduced. This system consists of a recompression supercritical carbon dioxide cycle for producing power and a humidification-dehumidification cycle for producing fresh water by using wasted heat of the first cycle. In order to simulate the combined system, a code has been developed in EES software, and the simulation results are validated for each of the cycles. Then, in order to energy and exergy analysis of the combined system, by considering the temperature of 755 °C and the heat rate of 1 MW for the heat source, the effect of the main variable parameters including pressure ratio (Pr), mass fraction (x), temperature of water inters to the humidifier, and water to air mass ratio in the desalination cycle (̇ ⁄̇ ), on the performance of the combined system has been investigated. And the results show that at the optimum operating condition, the exergy efficiency of the combined system is increased from the common value of 65% to 73%, and exergy efficiency of the precooler as the main cause for exergy loss in the recompression S-CO2 cycle, has increased less than 50% to approximately 99%.

To evaluate the effects of different irrigation levels and foliar application of nutrients, on dry matter yield and essential oil content and composition of peppermint (Mentha piperita L.), a field experiment was conducted as a split plot based on a randomized complete block design, with 12 treatments and three replications, at the faculty of Agriculture, University of Maragheh, Iran in 2021. The factors included irrigation as the main factor at three levels (irrigation after 20 (control), 40 (moderate stress), and 60% (severe stress) of the maximum allowable moisture depletion) and fertilizer source as the sub-factor at four levels (non-application of fertilizer (control), and foliar application of Macromix gold, Ecoquel micromix, and Vitalem forte). The results demonstrated that the highest (280.5 g.m-2) and lowest (113.7 g.m-2) total dry weight were obtained under normal irrigation conditions (control) with the application of Macromix gold and severe stress without fertilizer application, respectively. Total dry weight decreased by 22.7 and 40.3% under moderate and severe drought stress conditions, respectively compared to normal irrigation. Macromix gold, Vitalem forte, and Ecoquel micromix application enhanced the amount of total dry weight by 37.7, 23.8, and 17.1% compared to no fertilizer application, respectively. The highest content (2.1%) and essential oil yield (4.5 g.m-2) and also the highest amount of menthol (40.9%), menthone (28.1%), and cineole (6.2%) in the essential oil were observerd under moderate water stress conditions fertilized with Macromix gold. Based on the obtained results, the foliar application of Macromix gold could be recommended as an effective solution to enhance the quantity and quality of the peppermint essential oil under drought stress conditions.

Automatic keyphrase generation plays an important role in many text analysis and natural language processing tasks. Many existing methods are bound to select keyphrases from the terms and phrases that are present in the target text. This handicap could be overcome using sequence-to-sequence methods. However, many such methods need huge datasets for training which pose a challenge for low-resource languages such as Persian. Transfer learning where a pre-trained model is adapted to a new task specified with a smaller dataset is very useful in such circumstances. In this paper, we present a sequence-to-sequence method utilizing a transformer model for Persian keyphrase generation. Accordingly, a corpus of 70K Persian scientific abstracts and their corresponding keyphrases have been gathered. A pretrianed MT5 mdel is fine-tuned on this corpus for the task of Persian keyword generation. The resulted model is compared to several other keyphrase generation methods. The results indicate that the proposed method can outperform existing methods at least by 2.71 percent.

This research carried out to optimize the micro propagation of medicinal plants dog rose, one of the rose rootstock, for quick access to get suitable callus. A factorial experiment conducted based on a completely randomized design with two factors, medium (1/2 MS and 1/4 MS) and different concentrations of 2,4-D (0, 1, 2.5, 4, and 5.5 mgL-1 ), with four replications. Explants prepared from middle of axillary stem during the fruiting stage in 1.5 cm length with nodal. The results evaluated based on deformation (ready to enter the callus production phase) and callugenesis ability after one month of planting. Results showed that the highest percentage of explants deformation related to 1/2 MS. The highest percentage of deformation in the bud area, and head and whole explants related to four and 2.5 mgL-1 2,4-D concentration, respectively. In addition, the highest percentage of callugenesis observed in one and two sides of explants. The highest fresh and dry weight of callus obtained from the high peak of 2,4-D and 1/2 MS containing 2.5 mgL-1 2,4-D. Callus produce in meristematic regions of leaflets base that attached to the axis of the explants (along with yellowing leaves) was not only influenced by 2,4-D. But also, this probably related to the importance of the high concentrations of medium nutrition time of taking explants (relating on the internal hormone balance and the amount of stored carbohydrates).

Integrating technology in the classroom is one of the essential competencies of teachers in the age of information and communication technology. Achieving new learning standards and meeting the learners’ needs in the present century depends on this competence. One of the most important issues and challenges in this field is the low knowledge, skills and attitudes of teachers in achieving the desired level of technology integration in the classroom. This prevents the use of technological capabilities in order to increase the quality of the teaching-learning process and also to meet the needs of the global community. Therefore, it is necessary to examine the methods and strategies for empowering teachers in this field and improving their level of technology integration in the classroom. Accordingly, the present study aimed to investigate the impact of the learning community as a learning strategy on improving the competence of high school teachers in integrating technology in their classroom.

The research method was mixed with an explanatory plan. In the quantitative part, the quasi-experimental method and the use of pre-test/ post-test with experimental and control groups, and in the qualitative part, the content analysis method were used. In conducting the research, knowledge and skills related to technology integration were discussed and shared in the classroom in the experimental group through the learning community, and the control group received the knowledge and skills related to technology integration separately. The statistical population of the study included all male teachers working in the first secondary school of District 2 of Kermanshah in the academic year of 1997-98, accounting for 310, of whom 30 teachers were selected from the statistical population via random sampling procedures and 15  via random placement in the experimental group and 15 others were included in the control group. In the qualitative section, all 15 teachers in the experimental group were considered as participants. The data collection tool was a semi-structured interview in the qualitative part and a researcher-made questionnaire in the quantitative part, compiled of 50 items. The validity of the questionnaire was confirmed by experts and its reliability was 0.97 using Cronbach's alpha. In the research, Momeni Rad’s (2020) learning community design model was used. Data analysis was performed using analysis of covariance using SPSS software and open coding was performed using MAXQDA software.

The results showed that teachers' learning community had a positive effect on their integrated technology knowledge (p= 0.002 <0.01 and F= 3.465), teachers' attitude towards technology integration (p = 0.0166 and F = 6.698) and also, the application of technology in the classroom by teachers (p=0.012 <0.05 and F=7.358) leading to increased teachers' knowledge, attitude, and skills in integrating technology in the classroom. Also, the analysis of qualitative data through open coding led to the extraction of six main categories, including search, support, self-assessment, cognition development, daring to learn, and synergy identified as an influential factor in the learning community on the integration of technology from teachers` view.

The learning community can be a supportive and effective factor in increasing the knowledge, attitude, and skills of teachers' technology integration in the classroom. Therefore, by forming and supporting teacher learning communities, the growth and development of teachers' professional competencies is increased in technology integration in the curriculum.

Heat transfer enhancement from a flat plate in which a thin blade is rotating at a certain speed in the vicinity of the plate has been investigated in the present study. For this numerical study, the finite volume method was used in which the rotation of the blade was simulated by the definition of sliding mesh and interface boundary within the computational domain. The equations of mass, momentum, and energy were solved in two-dimensional and transient form for airflow with constant physical properties using Fluent commercial software and the details of the flow and thermal fields were obtained at the top of the plate. The rotational Reynolds number of the blade has been changed in the range of 1360-5460 and the dimensionless parameter of blade-end-to-plate distance to the blade length (d/D) was ranged from 0.105 to 0.420. The results indicated that heat transfer from the plate is improved by increasing the rotational speed of the blade, especially on the front side of the rotating blade, while the effect of the d/D was effective only over a limited area of the plate central section

Patellofemoral pain occurs in the anterior part of the knee (around and behind the patella) and in activities such as sitting and long walks, going up and down stairs, and squatting. Exercise therapy is one of the basic strategies in the treatment of this syndrome, and Pilates is one of the training methods in which the central muscles of the trunk are called in all its movements and then the target muscles are challenged. Functional movement Screen (FMS) is a tool to identify the quality of movement patterns and this test can be effective in predicting and recognizing the defects of basic patterns. Additionally, improving this index can indicate the effectiveness of an exercise program. Therefore, the aim of this study was to evaluate the effect of 8 weeks of Pilates training on the overall and individual scores of the FMS index in girls with Patellofemoral pain syndrome.

In the present quasi-experimental study, 30 female students with Patellofemoral pain syndrome (mean age of 25.4 ± 4.9 years, height 161.8 ± 4.9 cm, weight 61.3 ± 5.2 kg) were randomly divided into two groups of control and pilates training. Subjects with a history of 6 months of pain in the anterior part of the knee and diagnosis and approval of a physician were included in the present study. All subjects were evaluated in the pre-test and post-test using FMS tools. The exercise program consisted of 8 weeks, three sessions per week, and each session lasted 45-60 minutes of selected pilates exercises. Data were analysed by SPSS software using Mann-Whitney and Wilcoxon statistical methods and interpreted at a significance level of 0.05.

The results of the present study showed that pilates training caused better performance with a significant difference in the overall FMS index (p=0.001) than the control group. Examination of the results of individual FMS tests showed that Pilates training compared to the control group improved the indicators of the pattern of Hurdle step (p=0.002), Straight-leg raise (p=0.015), Trunk stability push up (p=0.001) and Rotational stability (p=0.001). However, no significant differences were observed in Deep squat (p=0.249), In-line lunge (p=0.555) and Shoulder mobility (p=0.751) tests between the two groups.

Based on the results, pilates training has significantly improved the functional movement Screen (FMS) index and some of its subtests in girls with Patellofemoral pain syndrome. Therefore, it is recommended that trainers and people with this syndrome use pilates exercises to improve their motor function.

hyssop (Hyssopus officinalis L.) is a medicinal plant with an antimicrobial that has many applications. The present study was to evaluate the effect of different levels of stress salinity on germination of seeds hyssop, in a completely randomized design. In this experiment, different levels of sodium chloride (NaCl) (zero (distilled water), 50, 100, 150, and 200 mM) in four replications were evaluated. Petri dish containing Whatman filter paper (ash-free) each iteration includes a number 30 seeds disinfected by soluble fungicide Benomyl. In addition to treatment, the dose of 10 mg per liter of the solution was applied. Petri dish by parafilm clear sealant and then 14 days in the growth chamber under a temperature 2 ± 21℃ and eight hours dark photoperiod of 12 h light with fluorescent bulbs were stored. Results showed that salt stress on traits (seed vigor, germination rate, average germination percentage, seedling height, radicle, and shoot length) had a significant effect. So with increasing levels of salinity, indexes were reduced. When the salt or no salt at least, germination was successful. Due to, the treatment of 150 and 200 mM sodium chloride, Still, the seed germination rate was low, so it can be said that the hyssop in the phase germination, has relatively resistant to salt stress.

This study was carried out to examine the effectiveness of a parent training program based on cognitive-emotional mediation in improving mother-child interactions and maternal self-efficacy in mothers of children aged 3-6 in Yazd. Pretest, posttest, control group design was utilized in this quasi-experimental study.  The statistical population of the study was comprised of all mothers of children aged 3-6 who were not diagnosed with any mental condition and attended kindergarten in Yazd in 2018. The research sample consisted of 23 mothers who voluntarily participated in the study and were randomly assigned to the experimental (N= 10) and control groups (N= 13).The experimental group received cognitive-emotional mediation parent training program in 6 weekly sessions; however, the control group was not exposed to any intervention.  Before and after the training program both groups were pre- and post-tested via Pianta Child-Parent Relationship Scale (1992) and Dumka Parenting Self-Agency Measure (1996). Data were analyzed using ANCOVA and MANCOVA. Results indicated that parent training based on cognitive-emotional mediation enhanced the quality of mother-child interactions and maternal self-efficacy and decreased the conflicts between mothers and children. The findings revealed the significance of cognitive-emotional mediation in promoting daily mother and child interactions.

Wind turbines (WTs) with Permanent magnet synchronous generator (PMSG) are mostly integrated in power systems as popular energy conversion systems. From the machine-side converter (MSC) structure point of view, there are two types of PMSG-WTs: PMSG-WT with voltage source converter (VSC) as the MSC, and PMSG-WT with boost converter-diode rectifier as the MSC. The focus in this paper is on the control modification and dynamic and transient behavior improvement of PMSG-WTs with boost converter-diode rectifier. In this way, inner control loop of the boost converter current and outer control loop of generator speed are developed and extracted. Next, the boost converter control loop is modified by adding two auxiliary control signals, known as auxiliary damping signal and auxiliary compensation signal. The auxiliary damping signal modifies the boost converter current and provides a damping torque for inhibition of WT torsional oscillations. On the other hand, the auxiliary compensation signal, as the second auxiliary signal, limits the dc-link overvoltage during the voltage dip and amends the WT low voltage ride through capability. By modifying the wind turbine control through second auxiliary signal, the size, cost and rated energy of the required dc chopper resistance decrease considerably.

Induction of labor is a common procedure that is performed due to medical indications of mother or infant or social and elective causes. There are several methods for induction of labor, including misoprostol and oxytocin. Therefore, the aim of the present study was to determine and compare the effect of oxytocin and oral misoprostol on induction of pregnancy in term and post-term pregnancies.

This is a descriptive study that was conducted in 2019-2021. The statistical population consisted of 160 patients who were candidates for termination of pregnancy and were divided into two groups of 80 people, one group with misoprostol 50 micrograms which was administered as an oral solution up to a maximum dose of 200 micrograms and the other group with oxytocin ampoules with Initial doses of 10 units were induced. The success rate in each group was considered to achieve appropriate contractions (three contractions in ten minutes, each lasting 40 seconds) and finally the rate of successful normal delivery. The collected data were analyzed using Mann-Whitney, Chi-square and t-test.

According to the statistical test, a significant difference was observed between the two groups in the variables of type of delivery and lack of progress of delivery. The percentage of normal delivery in the misoprostol group was higher than the oxytocin group, which was statistically significant (p = 0.005). The mean age of patients in the misoprostol group compared to the oxytocin group was 28.21 7 7.64 and 25.84 99 5.99, respectively, which was not statistically significant (p = 0.005). Also, the lack of progression of labor was higher in the oxytocin group compared to the other group, which was statistically significant (p <0.001).

According to these cases, the present study displayed a better effect on induction of labor by misoprostol and considering that the two drugs were not different in side effects, it could indicate a better and more appropriate efficacy of misoprostol in induction of labor.

Drought stress, the most important is the inability of seeds to germination. Therefore, the present study was to evaluate the effect of different levels of stress drought on seed germination of seeds hyssop , in a completely randomized design. In this experiment , different levels of soluble Poly Ethylene Glycol 6000 with osmotic potential (zero (distilled water), -0.3, -0.6, -0.9, -1.2 and -1.5 MPa) four replications were evaluated. each iteration includes a Petri dish containing Whatman filter paper ash-free and number 30 seed disinfection by soluble fungicide Benomyl. In addition to treatment , the dose of 10 mg per liter of solution applied. Petri dish sealant by parafilm clear and then 14 days in the growth chamber under a temperature of 2 ± 21℃ and eight hours dark photoperiod of 12 h light with fluorescent bulbs were stored. Vigor index of seed, germination rate, germination percentage, seedling height, radicle length and plumule length was determined for each treatment. The results indicated that there were significant differences in levels of stress and decline while increasing stress. Stress from -0.6 MPa, significantly increased the radicle length. Thus, between -0.3 to -0.6 MPa drought stress at germination stage hyssop plants, the germination characteristics improves seed germination can be provided. On the other hand, hyssop with relative tolerant to stress adaptive mechanisms such as the production of a root system relatively long, so that in order to effectively use the resources.

We study Beck-like coloring of measurable functions on a measure space Ω taking values in a measurable semigroup ∆. To any measure space Ω and any measurable semigroup ∆, we assign a graph (called a zero-divisor graph) whose vertices are labeled by the classes of measurable functions defined on Ω and having values in ∆, with two vertices f and g adjacent if f · g = 0 a.e.. We show that, if Ω is atomic, then not only the Beck’s conjecture holds but also the domination number coincides to the clique number and chromatic number as well. We also determine some other graph properties of such a graph.