محمد حبیبی

In this article, we study skew monoid rings in which the monoid used in their structure is a quotient of a free monoid. We study annihilator conditions of them and describe conditions for transferring some properties from the base ring $R$ to these extensions. Interesting examples are provided for properties that are not transferred from $R$ to these extensions.

Fish cell cellular metastructures have received wide interest from researchers due to their zero Poisson ratio behaviour. However, their production, which is mainly based on additive manufacturing processes, is one of their limitations. Therefore, in this research, a new method based on the conventional manufacturing processes including laser cutting and metal forming was presented for the production of metallic cylindrical metastructures. Two samples were manufactured using this method and their quality was verified using mechanical and non-destructive tests. The samples’ mechanical and buckling behaviour under uniaxial compression were simulated using ABAQUS FEM package and experimentally validated. This was followed by the effects of the metastructures’ geometrical parameters including the cylinder diameter, height and thickness on their linear buckling being investigated numerically, and the results compared with the outcome of classic theories for conventional cylinder buckling. The results showed that these metastructures can be produced successfully with the conventional manufacturing processes, and t the buckling behaviour of these metastructures does not follow the classical buckling theories of cylinders; their buckling behaviour shows much lower sensitivity to the thickness and radius changes in comparison with conventional cylinders.

One of the most important quantitative and qualitative changes in the contemporary family is the phenomenon of women's custody, which has a growing trend. In the framework of gender studies and with reference to the to the feminist theory approach, the article examines the causes and consequences of custody as a social issue. Methodologically, the study was conducted with the Grounded theory approach and using the research interview technique. The samples are divorced women in Marivan city. Using purposive sampling and theoretical sampling, 20 people were interviewed. The finding is based on a paradigm model and is analyzed by extracting 13 central categories in the data coding process. "Socio-legal determinism" and "maternal emotions" are categories that imply causal conditions. "Class status" and "spouse child" as contextual conditions; and "Marital disputes", "men's inability to pay for family expenses" and "domestic violence" play a role as interfering conditions. The consequences of custody are reflected in the categories of "increasing poverty", "role pressure", "dependence" and "feeling of abandonment". Finally, the women react to the situation with dual strategies of "despair" and "tolerance". "Despair" represents subjective confrontation and "tolerance" means the objective acceptance of the custody.

One of the most important environmental problems of Miankaleh Wetland in recent years was the  high death rate of migratory wild birds in 2020. Accordingly, a comprehensive monitoring  program was designed  and carried out to investigate the causes of this mortality by the authors of this manuscript , in coordination with responsible organizations and the results were published by the Journal of Veterinary Research And Biological Products in  article, entitled "comprehensive monitoring of the high mortality rate of wild waterbirds of Miankaleh Wetland in 2020"  (called the Monitoring article for short), and in issue 140 of this journal, a critical article was published in the critique of the original article (called the critical article for short), which casts some doubt on the authors.  In this article were monitored  the methodology and results of the Monitoring article. The authors of Monitoring article, while thanking the authors of the Critical article for their attention, prepare present article in response to the Critical article authers.

The purpose of this study is the mediating role of organizational trust in relation to job motivation and organizational identity of Marvdasht Education Department employees. The research method used is part of applied research in terms of purpose and in terms of data collection method is part of descriptive correlational research. The statistical population of this research includes all employees of Marvdasht Education Department, which according to the recruitment statistics of this department The official staff is 140 people. To determine the sample size using random sampling method and using Morgan table, 103 people were selected as the sample. Data collection tool in this study is three questionnaires of organizational trust, job motivation and organizational identity to analyze the data. Descriptive and inferential statistics have been used. At the level of descriptive statistics, mean and standard deviation of research variables and at the inferential level, Pearson correlation coefficient significance test and simple regression and hierarchical Baroness analysis are used. The results after data analysis showed that there is a significant relationship between employees 'organizational trust with job motivation and organizational identity. Also, employees' organizational identity has a significant relationship with their job motivation. While organizational trust can mediate between job motivation and organizational identity. To play.

The purpose of this research was to investigate the effects of income diversification strategies on market power in Iranian banking system during the period of 2015-2020. The fitting method of the present study was the Generalized Method of Moments (GMM) model. Market power in banking system is measured by the Lerner index using the Translog stochastic frontier cost function. Two adjusted Herfindahl-Hirschman indices are used to measure income diversification strategies, including interest and non-interest income diversifications. The results showed that the non-interest income diversification strategy had a significant positive effect on market power in the banking system; however, the effect of the interest income diversification strategy on the market power was not confirmed.

Study of water stress effect in traits of crops is related to stress tolerance, increasing their growth and yield in stress situation.This research was performed to evaluate the impact of different irrigation regimes on cotton yield, fiber quality were conducted using a split-plot factorial design with four irrigation levels (rainfed, 33%, 66% and 100%) as the main factor. After physiological maturation, fiber performance and quality traits were evaluated.protein and phylogenetic properties have been evaluated by bioinformatics tools. The results indicated that the highest yield with 1.2 kg was observed in 66% irrigation treatment. The highest fiber weight was observed in 66% treatment and the lowest in rainfed conditions. Seeds grown under 66% irrigation saved more water and produced potential seeds with high quality fibers. Bioinformatics analysis also revealed that the intracellular locations of CesA and XET1 enzymes are plasma membrane and cell wall, respectively. The enzymes CesA and XET1 belong to the protein family of transferases and hydrolase, respectively. Phylogenetic analysis revealed that the sequences of both cotton enzymes with co-family genera were separated in the Malvaceae . It appears that in order to grow cotton seeds with desirable fibers in low water conditions and in dry areas, it is better to use seeds that are irrigated under optimal irrigation conditions (66%). by cultivating cotton seeds with about one third of the water requirement in three years, in addition to reducing the amount of water requirement and irrigation water consumption, better yields can be achieved.

Abstract In this research the survey The Effect’s orientation of social entrepreneurship on social innovation are discussed. The statistical population of dtudy are From The collection of people who participated in entrepreneurship festivals during the years1395-1977, which according to Morgan table have 384 users as a samples who completed questionnaires have been defined for this study Data were analyzed using CFA (Confirmatory Factor Analysis), SEM (Structural Equation Modeling), Kolmogrov – Smirnoff and Sobel test with Lisrel and SPSS22 software. The empirical result supports the claim that social-entrepreneurship has a significant, direct and positive effect on social innovation. It also showed that social innovation has direct and positive effect on Product innovation and Product Service. The results of this study are useful for Entrepreneurs that make innovation in Service and Product. Key Words: social entrepreneurship, innovation Service, innovation Product.

One of the most important environmental problems of Miankaleh wetland in recent years was high mortality of wild waterbirds occurrence in 2020. The present study was conducted to perform a comprehensive monitoring of this event and accurate diagnosis of the cause of death, due to the environmental significance of wild waterbirds mortality, through standard passive Surveillance methods and clinical, autopsy and laboratory studies. The estimated death of birds was 38587, during 50 days. The highest losses were related to Common Coot (about 85%) and flamingos (6%). 198 birds were sampled from different species of birds in two areas (Behshahr and Galuogah). Tissue samples included samples of pharyngeal and tracheal swabs, cloaca, whole blood and blood serum of live birds, and brain, tracheal, lung, gizzard and anterior gastric tissues, intestines and its contents, liver, spleen, pancreas and Chest muscle of dead birds. Tests performed on the samples included: influenza serotypes, Newcastle disease, avian Cholera, pasteurella, duck viral enteritis, duck viral hepatitis, differential diagnosis between gram-negative and gram-positive bacteria, presence of mercury, Arsenic and the remnants of pesticides in tissues and samples, cyanide in water. All tests were negative, except for botulin toxin. According to the results, Clostridium botulinum poisoning is cause of high casualties of waterfowl in Miankaleh Wetland. Laboratory results were shown that the physicochemical properties of alluvium and water create favorable conditions for the production of biotoxins and if it will be not managed, they may recur in the coming years.

Let $R$ be a unitary ring with an endomorphism $σ$ and $F∪{0}$ be the free monoid generated by $U={u_1,…,u_t}$ with $0$ added, and $M$ be a factor of $F$ setting certain monomial in $U$ to $0$, enough so that, for some natural number $n$, $M^n=0$. In this paper, we give a sufficient condition for a ring $R$ such that the skew monoid ring $R*M$ is quasi-Armendariz (By Hirano a ring $R$ is called quasi-Armendariz if whenever $f(x)=Σa_ix^i$ and $g(x)=Σb_jx^j$ in $R[x]$ satisfy $f(x)R[x]g(x)=0$, we have $a_iRb_j=0$ for every $0leq i leq m$ and $0leq j leq n$) and provide rich classes of non-semiprime quasi-Armendariz rings. Let $R$ be a unitary ring with an endomorphism $σ$ and $F∪{0}$ be the free monoid generated by $U={u_1,…,u_t}$ with $0$ added, and $M$ be a factor of $F$ setting certain monomial in $U$ to $0$, enough so that, for some natural number $n$, $M^n=0$. In this paper, we give a sufficient condition for a ring $R$ such that the skew monoid ring $R*M$ is quasi-Armendariz (By Hirano a ring $R$ is called quasi-Armendariz if whenever $f(x)=Σa_ix^i$ and $g(x)=Σb_jx^j$ in $R[x]$ satisfy $f(x)R[x]g(x)=0$, we have $a_iRb_j=0$ for every $0leq i leq m$ and $0leq j leq n$) and provide rich classes of non-semiprime quasi-Armendariz rings.

Childbirth is a physiologic but stressful event in women's life. Anxiety during labor can affect pregnancy outcomes and causes pain and fear of childbirth. So, reduction of anxiety during labor was strictly recommended in various studies. Acupressure, against pharmacological methods, is a simple and cost-effective method which is limitedly investigated in childbirth. This study was performed with aim to investigate the effects of acupressure at LI4, He7, SP6 and Neima points on anxiety during labor in nulliparous women. This randomized clinical trial was conducted on 130 mothers who were hospitalized in delivery wards of Qazvin Razi hospital in 2018. They were randomly assigned to intervention and control groups. In the intervention group, stimulation of SP6 and Neima points was started in cervical dilatation of 4 cm and continued for 30 minutes, then in cervical dilatation of 8 cm, stimulation of LI4 and H7 continued by TENS until the end of delivery. Control group received routine obstetrics cares. Spielberger’s State-Trait Anxiety Inventory (STAI) was completed at the time of admission to delivery room and one hour after delivery. Data was analyzed by SPSS software (version 24) and Chi-square, independent t-test, Paired t-test. P Acupressure had a significant influence on mean score of state anxiety in experimental (33.7 ± 9.5) compared to control group (40.1 ± 9.9) (P = 0.001). Difference in mean score of trait anxiety in experimental (35.5 ± 8.2) compared to control group (39.08 ± 7.7) was statically significant (p=0.04). Stimulation of LI4, H7, SP6 and Neima points is effective in decreasing state and trait anxiety in nulliparous women and is recommended as one of the methods for treatment of anxiety in pregnancy and childbirth.

labor increases the chances of cesarean section delivery and creates maternal and neonatal complications (like fetal heart rate drop).  This study aimed to investigate the effect of acupressure on sp6, He-7, LI4, and NEIMA points on the duration and outcome of delivery in nulliparous women. This randomized clinical trial was performed on 130 mothers admitted to the Maternity Ward of Razi Hospital in Qazvin City, Iran. The samples were randomly assigned to the intervention (n=64) and control groups (n=66). The intervention group received Transcutaneous Electrical Nerve Stimulation (TENS) on four acupressure points (SP6, LI4, He-7, and NEIMA) in the unilateral upper and lower extremities during the delivery stages and the control group was received routine labor care. Durations of the first and second stages of delivery were measured using a digital clock. The obtained data were analyzed by the Chi-square, t-test, and Mann-Whitney tests. The Mean±SD age of the participants was 24.48±4 years. Acupressure intervention did not produce a significant effect on the mean duration of the first and second stages of delivery in the intervention group compared to the control group (P>0.05). Also, the outcome of delivery in the two groups did not show a significant difference (P>0.05). The application of TENS on specific acupuncture points could not reduce the length of labor stages and the outcome of childbirth. Further studies are recommended in this regard.

Loading and hauling represent an important part of open pit mines production cycle and account for a considerable share of the total operating cost. The decision making during mine planning requires suitable and quick cost models. This paper intends to develop a model for estimating the capital and operating cost of major loading and haulage equipment used in the open pit mining, applying single (SRA) and multiple regression analysis (MRA). The MRA is based on Principal Component Analysis (PCA). The equipment include classical loading vehicles including hydraulic and cable shovels, wheel loader and backhoe along with rigid rear dump truck. Cost functions are classified on the basis of cost types; i.e. capital and operating costs. Furthermore, a set of functions is presented for operation cost items. Explanatory variable in SRA is bucket capacity of loading and hauling while explanatory variables in MRA include bucket capacity, power and certain specific parameters (including dump height, digging depth and boom length) depending on the proposed equipment. The performance of each multivariate cost function has been measured through the Mean Absolute Error Rate, whose maximum was found to be 17%.

This paper studies seismic evaluation of unsymmetric-plan tall reinforced concrete (RC) buildings with a dual wall-frame system, in which the effect of higher modes in plan and height is important. In this paper, one unsymmetric-plane reinforced concrete building of 18-story height was studied. Shear walls were replaced with an equivalent beam-column and their nonlinear behavior was considered with the interaction point hinges (PMM) and fiber elements. The seismic responses of the buildings were computed by nonlinear response history analysis (NL-RHA), advanced pushover analyses including the modal pushover analysis (MPA), the consecutive modal pushover (CMP), the upper bound pushover analysis (UB) and the extended N2 method (EN2) and a conventional pushover analysis with fundamental mode force distribution considering the two nonlinear behavior for the shear walls mentioned above. The results show that floor displacements are slightly influenced by the shear wall nonlinear model in comparison with the story drifts and plastic hinge rotations. Errors resulting from interaction point hinge (PMM) are almost larger than those from the fiber element. Also, the results indicate that the advanced pushover analyses can evaluate the seismic demands accurately in unsymmetric-plane tall buildings; The EN2 method gives a larger error compared with the other advanced methods, especially in estimating plastic hinge rotations.

Destruction of ammunition and explosives which are defected during production, transportation, storage or use, is very important requiring special attention. Immersed in sea water, burning, exploding, buried are common methods of demolition and disposal of explosives. Today, drowned at sea and on land faces many limitations due to environmental sensitivities and decomposition methods are not applicable in many cases and therefore, the explosion and burning are common methods for destroying them. In this paper, the methods of explosives demolition by burning and explosion were studied and their general requirements, limitations, electrical power requirements, sensitivity to the electrical signal and required containers were investigated. Also, destruction of the dangerous components of munitions and explosives such as RDX and PENT, gun powder and propellant were studied.

In order to optimize and optimize the supply of food needed Operations forces in military missions, exercises, camps, and other exercises Military ... prepared and backed up to provide food rations that provide The energy and nutrients needed by people are one of the main problems in providing and supporting Nutrition including the preparation of raw materials, cooking, distribution, contamination and spoilage of food, update Diseases caused by contaminated food, food waste and other problems Preventive measures should be taken to ensure the supply of food needed by the operational forces. Accordingly, during the studies of the basics and principles of military nutrition, including food diets. Individual operations of different and prominent countries of the world, such as France, Angis, USA, Russia, Germany, Canada, etc. Designing Indigenous Operating Diets One-Day Indigenous Operation "Indigenous" According to the country's food culture, production facilities, food safety and health, price and more Health, health and military factors were taken into account. Initial design of the mentioned diets in 5 varieties In the special exhibition of achievements, the attention of the Supreme Commander of the Armed Forces and the commanders of the IRGC, The General Staff of the Armed Forces and the Ministry of Defense were appointed. Then the number of these diets as Sample production and by logistics experts and operational personnel in a specific scenario It was subjected to field testing and evaluation. By analyzing the results, the corrections The necessary work was done in the diets and then on a larger scale between the operational force units. Was consumed; And now it is produced and consumed as an operating food ration.